• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A light guide (112) for a vehicle lamp (100) includes a bar-shaped portion (116) and a plate-shaped portion (118). The bar-shaped portion (116) includes a bar-shaped light guide portion (120) and a projecting connecting portion (122) projecting from a peripheral surface (120c) of the light guide portion bar-like and extending along the bar-shaped light guide portion (120). The plate-shaped portion (118) includes two facing major surfaces, and a side surface of the plate-shaped portion (118c) connecting the two major surfaces. The light guide (112) is a multi-colored molded product in which the bar-shaped portion (116) is formed of a first resin material, and the plate-shaped portion (118) is formed of a second material resin containing a light scattering agent. The bar-shaped light guide portion (120) is connected to the side surface (118c) of the plate-shaped portion (118) by the projecting connecting portion (122).
    公开号:FR3070071A1
    申请号:FR1857386
    申请日:2018-08-08
    公开日:2019-02-15
    发明作者:Eiji Matsubara；Mamoru Kosuge；Akinori Yamamoto；Asami NAKADA
    申请人:Koito Manufacturing Co Ltd；
    IPC主号:
    专利说明:

    LIGHT GUIDE AND VEHICLE LAMP TECHNOLOGICAL BACKGROUND OF THE INVENTION
    1. Field of the Invention The present invention relates to light guides suitable for use in lamps, such as vehicle lamps. The present invention further relates to vehicle lamps for use, for example, in vehicles, such as automobiles.
    2. Description of the Related Art [0002] We know, to date, a vehicle lamp which emits light from a light source towards the front of the lamp by a light guide. For example, the document JP2014-116142 describes a vehicle lamp having the following structure. Specifically, light enters a plate-shaped light guide, through a side surface thereof, the light is then reflected by a reflective element., Such as a facet, provided on a main surface d an inner side of the lamp, and light is emitted towards the front of the lamp, through another main surface, on an outer side of the lamp.
    With the structure of light emission by a reflective element, of a light guide, such as a facet, it is difficult to obtain a uniform surface emission by the light guide.
    SUMMARY OF THE INVENTION The present invention has been made in view of the foregoing, and is intended to provide a technique for improving the uniformity of emission of a surface of a light guide.
    To solve the above problem, a light guide according to one aspect of the present invention includes a bar-shaped part and a plate-shaped part. The bar-shaped IG portion includes a bar-shaped light guide portion and a projecting connection portion projecting from a peripheral surface of the bar-shaped light guide portion and extending along the bar-shaped light guide portion. The plate-shaped part includes, two main surfaces opposite one another and a side surface of the plate-shaped part connecting the two main surfaces. The light guide is a multi-colored molded product in which the bar-shaped part is formed from a first resin material and the plate-shaped part is formed from a second resin material containing a diffusion agent. light. The light guide portion is connected to the. lateral surface of the plate-shaped part by the projecting connecting part. According to this aspect, the emission uniformity of a surface of the light guide can be improved.
    In one embodiment, the connection part.
    protruding may include a bonding surface connected to the side surface of the plate-like part. In one embodiment, the protruding connecting part may include two lateral surfaces of the protruding part, arranged on respective sides of the connecting surface, and connecting the connecting surface to the peripheral surface of the guide guide part. bar shaped light. In one embodiment, one of the two lateral surfaces of the projecting part can be flush with one of the two main surfaces of the plate-shaped part. In one embodiment, the two lateral surfaces of the projecting part can be flush with the respective main surfaces of the plate-shaped part. In one embodiment, the connecting surface can be inclined relative to the lateral surfaces of the protruding part. In one embodiment, the plate-shaped part may have a base thickness greater than a width of the connecting surface, the width being a distance between the two lateral surfaces of the projecting part and the projecting connecting part. , and a part of the peripheral surface of the bar-shaped light guide part can be connected to the lateral surface of the plate-shaped part.
    In one embodiment, at least one of the two lateral surfaces of the projecting part can be tangent to the peripheral surface of the bar-shaped light guide part. In one embodiment, one of the two lateral surfaces of the projecting part can be tangent to the peripheral surface of the bar-shaped light guide part, and the connecting surface can form an obtuse angle with one of the lateral surfaces of the protruding part which is tangent to the peripheral surface of the light-shaped bar portion, and forming an acute angle with the other one of the lateral surfaces of the protruding part.
    In one embodiment, a width of the connecting surface can be greater than a base thickness of the plate-shaped part, the width being a distance between the two lateral surfaces of the projecting part. In one embodiment, at least one of the side surfaces of the protruding part may include a shelf-shaped part connected to the side surface of the plate-shaped part. In one embodiment, another shelf portion may be provided on the plate-shaped side surface.
    In one embodiment, the projecting connection part may partially protrude on the lateral surface of the. part in the form of a plate. In one embodiment, the projecting connecting portion may include a bonding surface connected to the side surface of the plate-shaped portion, the bonding surface may include a facet, and the side surface of the shaped portion plate may include a facet which engages in the facet of the bonding surface.
    In one embodiment, the bar-shaped light guide part and the projecting connection part can be molded in one piece. In one embodiment, the bar-shaped light guide portion can
    to be curved. In one embodiment, the first resin material and the second resin material may have a common optical property. In one embodiment, the light guide can include neither an optical element nor a reflecting element.
    One aspect of the present invention provides a vehicle lamp. The vehicle lamp can include the light guide according to any of the preceding aspects and a light source. The light source can be configured to emit light, and the light can enter the bar-shaped light guide portion through a light incident surface of the bar-shaped light guide portion, entering in the plate-shaped part, from the plate-shaped light guide part, through the projecting connection part, and be emitted through the main surfaces of the plate-shaped part by the agent light scattering.
    BRIEF DESCRIPTION OF THE DRAWINGS [0012] FIG. 1 is a front view of a vehicle lamp according to one embodiment;
    Fig. 2 is a front view illustrating an interior structure of a vehicle lamp according to an embodiment;
    Fig. 3A is a sectional view taken along the line A-A indicated in FIG. 2, and FIG. 3B is a sectional view taken along line B ~ B indicated in Figure 2;
    Fig. 4A is. a front view of a light guide according to one embodiment, and FIG. 4B is a sectional view taken along line C-C indicated in Figure 4A;
    Fig. 5 is. an enlarged schematic perspective view of an end portion of a bar-shaped portion in a light guide according to one embodiment;
    Figs. 6A and 6B are schematic diagrams for describing a method of measuring the light emission efficiency of a plate-shaped part;
    Fig. 7 illustrates a cross-sectional shape of a light guide according to a comparative example;
    Figs. 8A and 8B are schematic diagrams illustrating examples of problems which may arise in the method of molding a light guide according to a comparative example;
    Figs. 9A to D illustrate various other examples of the light guide according to one embodiment;
    Figs. 10A to 10D illustrate various other examples of the light guide according to one embodiment; and
    Figs. 11A to 11C illustrate various other examples of the light guide according to one embodiment.
    DETAILED DESCRIPTION OF THE INVENTION The invention will now be described with reference to the preferred embodiments. This is not intended to limit the scope of the present invention, but to illustrate it with examples. [G014] The present invention will be described below on the basis of examples of embodiments with reference to the drawings. The embodiments are given by way of illustration, and are not intended to limit the invention. The characteristics described in the embodiments and the corresponding combinations are not necessarily essential to the invention. Identical or equivalent constituent elements, members and processes, illustrated in the drawings, are assigned identical reference characters, and their duplicate descriptions will be omitted, where appropriate. The scales and the shapes of the components illustrated in the drawings are given for information only to facilitate descriptions, and should not be interpreted as limiting the invention, unless otherwise specified. Terms such as "first" and "second" used in the present description and in the claims indicate neither the order nor the importance, and are simply used to distinguish between a given configuration and another. [0015] FIG. 1 is a front view of a vehicle lamp according to one embodiment. Fig. 2 is a front view illustrating an interior structure of a vehicle lamp according to one embodiment. Fig. 3A is a sectional view taken along the line A-A indicated in FIG. 2. Fig. 3B is a sectional view taken along line B-B indicated in Figure 2. FIG. 4A is a front view of a light guide according to one embodiment. Fig. 4B is a sectional view taken along line C-C indicated in FIG. 4A. Fig. 5 is an enlarged schematic perspective view of an end portion of a bar-shaped portion in a light guide according to one embodiment.
    A vehicle lamp 100 according to the present embodiment is, for example, a combined rear light arranged in a rear part of a vehicle. The vehicle lamp 100 includes a lamp body 102 having an opening and an outer light-transmitting cover 104 which covers the opening in the lamp body 102. The lamp body 102 and the outer cover 104 form a lamp space 106 , and a light source 110, a light guide 112, and a shielding element 114 are housed in the lamp space 106. The light source 110, the light guide 112, and the shielding element 114 are each fixed to the lamp body 102. FIG. 2 illustrates the vehicle lamp 100 with the outer cover 104 and the shielding element 114 removed therefrom.
    The light source 110 is a light emitting diode (LED), for example. According to a variant, the light source can be a laser diode (LD), another light-emitting semiconductor element, such as an organic or inorganic light-emitting element (EL), an incandescent lamp, a halogen lamp, a discharge lamp, or similar.
    The light guide 112 includes a bar-shaped part 116 and a plate-shaped part 118. The bar-shaped part 116 is intended to serve as a light conduit for guiding the light between the light source 110 and the part plate-shaped 118. The bar-shaped portion 116 extends along at least a side edge portion of the plate-shaped portion 118. The bar-shaped portion 116 includes a light guide portion in the form of a bar 120 and a projecting connection portion 122. The bar-shaped light guide portion 120 and the protruding connecting portion 122 are molded in one piece. The plate-shaped part 118 is intended to serve as an emission part which allows the light guided by the bar-shaped part 116 to be emitted outside the light guide 112. The plate-shaped part
    118 has a strictly elongated shape in the direction in which the bar-shaped portion 116 extends.
    The plate-like part 118 has two main surfaces 118a and 118b which are opposite to each other. The main surface 118a is placed to face towards the front of the lamp, and the main surface 118b is placed to face towards the rear of the lamp. The plate-shaped part
    118 further includes a plurality of side surfaces connecting the two main surfaces 118a and 118b. The plate-shaped portion 118 according to the present embodiment has a substantially rectangular shape elongated in the direction in which the bar-shaped portion 116 extends and includes four side surfaces 118c, 118d, 118e, and 118f.
    The lateral surface 118c and the lateral surface 118d extend in the direction in which the bar-shaped portion 116 extends or, in other words, extend, in the transverse direction of the vehicle. The side surface 118c is located lower than the side surface 118d in the vertical direction. The side surface 118c extends parallel to the direction in which the bar-shaped portion 116 extends.
    The side surface 118d is curved to gradually approach the side surface 118c from the outside side 10 in the transverse direction of the vehicle to the inside side in the transverse direction of the vehicle. The side surface 118e and the side surface 118f extend in the direction substantially orthogonal to the direction in which the bar-shaped portion 116 extends. The side surface 118e connects the side surface 118c and the side surface 118d at their outer end portions in the transverse direction of the vehicle, and the side surface 118f connects the side surface 118c and the side surface 118d at their inner end portions in the transverse direction of the vehicle.
    The bar-shaped light guide portion .120 is a long member which extends in a given direction and is a light guide having the shape of a round bar. The bar-shaped light guide portion 120 according to the present embodiment has a columnar shape and extends in the transverse direction of the vehicle. The bar-shaped light guide portion 120 has an end portion 120a (or an end surface) placed outside in the transverse direction of the vehicle, another end portion 120b (or a surface end) placed inside in the transverse direction of the vehicle and a peripheral surface 120c connecting the two end parts 120a and 120b. In one example, the bar-shaped light guide part 120 extends in a slightly accentuated curve, but this example is not limiting, and the bar-shaped light guide part 120 can be heard linearly. . Alternatively, the bar-shaped light guide portion 120 may include a linear portion and a curved portion connected to each other along the direction in which the bar-shaped light guide portion 120 extends. In one embodiment, the bar-shaped light guide portion 120 may have the shape of an elliptical column.
    The projecting connecting portion 122 protrudes from the peripheral surface 120c of the bar-shaped light guide portion 120 and extends along the bar-shaped light guide portion 120. The portion of protruding connection 122 protrudes from the peripheral surface 120c in the radial direction of the bar-shaped light guide part 120. In the present embodiment, the bar-shaped part 116 is placed under the plate-shaped part 118 in the vertical direction and the projecting connecting portion 122 protrudes from the bar-shaped light guide portion 120 upward in the vertical direction. The projecting connection part 122 is. a linear projecting portion extending in the direction in which the bar-shaped light guide portion 120 extends, and is formed on the peripheral surface 120c to extend substantially the entire length of the guide portion bar shaped light 120. In one example, the projecting connecting portion 122 is provided at the end portion 120b of the bar shaped light guide portion 120, but not at the portion end 120a of the bar-shaped light guide portion 120. In the light guide 112, the bar-shaped light guide portion 120 is connected to the side surface 118c of the plate-shaped portion 118 by the projecting connection part 122.
    The projecting connecting part 122 has a connecting surface 122a and two lateral surfaces of the projecting part 122b and 122c. The connecting surface 122a is connected to the lateral surface 118c of the plate-shaped part 118. The connecting surface 122a corresponds to an upper surface of the projecting connection part 122 which connects the two lateral surfaces of the projecting part 122b and 122c. The side surfaces of the protruding part 122b and 122c are arranged on respective sides of the connecting surface. 122a and connect the connecting surface 122a to the peripheral surface 120c of the bar-shaped light guide part 120. The two lateral surfaces of the projecting part 122b and 122c are opposite to each other. The connecting surface 122a is connected, orthogonally to the lateral surfaces of the projecting part 122b and 122c.
    In a state in which the projecting connecting part 122 is connected to the plate-shaped part 118, the lateral surfaces of the projecting part 122b and 122c connect the peripheral surface 120c of the light guide part in bar form 120 at the main surfaces 118a and 118b of the plate-shaped part 118. The two lateral surfaces of the protruding part 122b and 122c are flush with the respective main surfaces 118a and 118b of the plate-shaped part 118. in other words, the side surfaces of the protruding part 122b and 122c are flush with the respective adjacent main surfaces 118a and 118b of the plate-like part 118. As illustrated in FIG. 4B, when viewed along a section orthogonal to the direction in which the bar-shaped portion 116 extends, the side surfaces of the protruding portion 122b and 122c form straight lines with the main adjacent surfaces 118a and 118b, respectively, of the plate-shaped part 118. No facet is present at a part where the projecting connecting part 122 and the plate-shaped part 118 are connected to each other. other. In one example, the plate-like part 118 has a thickness, or a base thickness T, for example, in the range 25 from 1 mm to 20 mm or, for example, in the range from 1 mm to 5 mm.
    The "base thickness" of a molded product typically refers to the thickness generally contained in the molded product as a whole.
    In one example, the bar shaped light guide portion 120 has a diameter Al in the range of 3 mm to 20 mm or, for example, in the range of 5 mm to 15 mm. The projecting connecting part 122 has a width A2 equal to the base thickness T of the plate-shaped part 118. Thus, the width A2 is in the range of 1 mm to 20 mm or, for example, in the. range from 1 mm to 5 mm. The width A2 of the projecting connecting part 122 corresponds to the distance between the two lateral surfaces of the projecting part 122b and 122c. The protruding connecting portion 122 has a height A3 in the range of 0.5 mm to 20 mm or, for example, in the range of 2 mm to 10 mm. The height A3 of the projecting connecting part 122 corresponds to the projecting height of the projecting connecting part 122, starting from the peripheral surface 120c of the bar-shaped light guide part 120.
    The base thickness T of the plate-shaped part 118 is less than the diameter Al of the bar-shaped light guide part 120. The width A2 of the projecting connection part 122 is less than the diameter A1 of the bar-shaped light guide portion 120. The height A3 of the projecting connecting portion 122 is less than the diameter A1 of the bar-shaped light guide portion 120.
    As can be seen in Figs. 4B and 5, the section of the bar-shaped portion 116 along a plane orthogonal to its. direction of extension has a shape obtained by combining a circular region and a rectangular region. The circular region corresponds to the cross section of the bar-shaped light guide portion 120 and the rectangular region corresponds to the cross section of the protruding connecting portion 122. The rectangular region is adjacent to the circular region and coupled to it. This cross-sectional shape is symmetrical about a straight line extending from the diameter of the circular region serving as the axis of symmetry.
    The vehicle lamp 100 includes the shielding element 114. The shielding element 114 is a long plate-shaped element extending in the transverse direction of the vehicle. The shielding element 114 is in the form of a frame and extends over the peripheral part of the light source 110, the bar-shaped part 116, and the plate-shaped part 118, in a plane oriented towards the front of the lamp. The shielding element 114 can conceal the peripheral part of the light source 110, the bar-shaped part 116, and the plate-shaped part 118 from the outside of the lamp. The entire bar-shaped part 116 is concealed by the shielding element 114. In other words, not only the bar-shaped light guide part 120, but also the projecting connecting part 122 are arranged so as not to be visible from the outside of the lamp. The main surfaces of the plate-like part 118 are exposed through an opening in the frame constituting the shielding element 114. Consequently, as illustrated in FIG. 1, only the plate-shaped part
    118 is visible from the outside of the lamp.
    The light guide 112 is a multicolored molded product in which the bar-shaped part 116 is formed of a first resin material and the plate-shaped part 118 is formed of a second resin material. The first resin material and the second resin material both transmit light, and therefore the light guide 112, as a whole, is a light-transmitting resin member. Light guide 112 is made in one piece molded by a well known double color molding process, for example. Light guide 112 can also be manufactured by a multi-component double color molding process in which the bar-shaped part 116 serves as the primary molded product and the plate-shaped part
    118 serves as a secondary molded product. Alternatively, the plate-like portion 118 may serve as the primary molded product, and the bar-shaped portion 116 may serve as the secondary molded product. The light guide 112 can also be manufactured by an insertion molding process in which the bar-shaped portion 116 (or the plate-shaped portion 118) serves as a resin insertion product.
    The first resin material to form the bar-shaped portion 116 (i.e., the bar-shaped light guide portion 120 and the protruding connecting portion 122) is a transparent resin material containing no light scattering agent 119 and the second resin material for forming the plate-like portion 118 is a transparent resin material containing a light scattering agent 119. The transparent resin material is, for example, a resin thermoplastic or a transparent thermosetting resin, such as polycarbonate resin or acrylic resin. In general, the transparent resin material making up the first resin material, and the transparent resin material making up the second resin material are the same material, but may be different. In a case where the two transparent resin materials are different, the two transparent resin materials preferably have a common optical property (e.g., refractive index) so as to obtain a strong propagation of light between the bar-shaped portion 116 and plate-shaped portion 118. The light scattering agent 119 is uniformly mixed in the transparent resin material. The first resin material may contain the light scattering agent 119 at a concentration lower than that of the second resin material. As illustrated in an enlarged view of a dotted region R in FIG. 3B, the plate-like portion 118 contains the light scattering agent 119. Examples of the light scattering agent 119 include a metal oxide particle, such as a titanium dioxide particle. The average size of the titanium dioxide particle is, for example, from 150 nm to 500 nm, preferably from 160 nm to 450 nm, more preferably from 170 nm to 450 nm, even more preferably from 200 nm to 400 nm, and in particular preferably from 220 nm to 400 nm. The content of the light scattering agent 119 is, for example, from 0.1 ppm by mass to 100 ppm by mass, relative to the total mass of the plate-like part 118, preferably from 0 , 1 ppm by mass to 50 ppm by mass, and more preferably, from 0.1 ppm by mass to 10 ppm by mass. The proportion of transformation of rutile in the particle of titanium dioxide is, for example, at least 50% by mass, preferably, at least 60% by mass, more preferably, at least 70% by mass, and even more preferably, at least 90% by mass. The plate-like portion 118 may contain another monomer which may be copolymerized with a primary monomer of a resin used therein or a typical additive, such as an anti-static agent, an antioxidant, an agent release agent, flame retardant, lubricant, flow enhancing agent, filler, or light stabilizer.
    When the haze value is measured with the thickness of the plate fixed at 4 mm, the plate-shaped part 118, in at least part of it, has a haze value in the direction of l plate thickness greater than 7% but not more than 30%. When the haze value is measured under the same condition, the bar-shaped portion 116 has a haze value of up to 7%. When the visible light transmission is measured with the thickness of the plate fixed at 4 mm, the plate-shaped part 118, in at least part of it, has a visible light transmission, in the direction the thickness of the plate, between 60% and 92%. The visible light transmission in the thickness direction of the plate corresponds to the proportion of the amount of light emitted in all directions through the main surface 118a, relative to the amount of light entering the shaped part of plate 118 through the main surface 118b, in the direction perpendicular to the main surface 118b. The haze values of the plate-like portion 118 and the bar-shaped portion 116 can be measured using the HZ-2 turbidimeter (manufactured by Suga Test Instruments Co., Ltd.) according to JIS K7136. The visible light transmission from the plate-like part 118 of the HZ-2 turbidimeter (manufactured by
    Suga Test Instruments Co.,
    The plate part 118 satisfies the following conditions with regard to the emission efficiency obtained when the light entering, through the side surfaces 118c to 118f is emitted through the main surface 118a. Figs. 6A and 6B are schematic diagrams for describing a method of measuring the light emission efficiency of the plate-shaped part. Fig. 6Ά illustrates the dimensions of the plate-shaped part 118 and the arrangement of an LED. Fig. 6B illustrates the plate-like part 118 to which a mounting frame B is attached, viewed from one side C of an outlet surface of
    1a. light.
    As illustrated in FIG. 6A, a portion in the shape of a rectangular parallelepiped plate 118 having a dimension of 100 mm in the up-down direction, a dimension of 190 mm in the right-left direction, and a thickness of 3.2 mm, is prepared. A lateral surface A of this plate-shaped part 11.8 serves as the incident surface of the light source. The LED is arranged in a direction perpendicular to the lateral surface A. The LED is arranged so that a focal point P is oriented facing the lateral surface A, and that the focal point A is located at a distance of 1.85 mm from the lateral surface A. The light is diffused by an emitting surface of the. LED in a range of ± 80 degrees.
    As illustrated in FIG. 6B, the periphery of the prepared plate-like part 118 is covered by the mounting frame B. In a state in which the plate-like part 118 is covered by the mounting frame B, the light-emitting surface C of the plate-like part 118 has a dimension of 90 mm in the up-down direction and a dimension of 160 mm in the right-left direction. Neither the front surface nor the rear surface of the mounting frame B reflects the light. In addition, a light receiving surface (not shown) is disposed at a distance of y'iO from the light exit surface C, in the direction perpendicular to the light exit surface C.
    In this state, the light is emitted by the LED. The. luminous flux of light then applied to a rectangular region of the light receiving surface is measured. This rectangular region is defined by lines at 15 degrees and lines above and below 25 degrees right and left, relative to the center, at an intersection of the light-receiving surface, and the line perpendicular to the light-emitting surface C, at its center. In the case of the plate-shaped part 118, the luminous flux of the light applied to this rectangular region is at least 0.3%, the luminous flux of the light emitted by the LED being 1.
    The plate-shaped part 118 has the following optical characteristics. Specifically, when light enters the plate-like portion 118 through one of the side surfaces 118c to 118f, the amount of light emitted per unit area through the main surface 118a is greater than the amount of light emitted by surface unit, through the side surface (e.g., the side surface 118d) facing the side surface (e.g., the side surface 118c) through which light has entered the shaped portion plate 118. When light enters the plate-like portion 118 through the main surface 118b, the amount of light emitted per unit of surf ace. through the main surface 118a is greater than the amount of light emitted per unit area through the side surfaces 118c to 118f. In dpf other words, in the shaped portion of plate 118, in both cases where the light enters the plate-shaped portion 118 through the side surfaces 118c to 118f, and enters the shaped plate portion 118 through the main surface 118b, the. proportion of light emitted through the. main surface 118a is greater than the proportion of light emitted through the lateral surfaces 118c to 118f. The light source 110 is arranged so that its light-emitting surface opposes the one end portion 120a of the bar-shaped light guide portion 120. The light emitted by the light source 110 enters the bar-shaped portion 116 through the end portion 120a serving as the light incident surface of the bar-shaped light guide portion 120. The light that has entered the shaped portion bar 116 enters the plate-like portion 118 from the bar-shaped light guide portion 120 through the protruding connecting portion 122. To be more precise, light from the light source 110 propagates inside the bar-shaped portion 116 while undergoing internal reflection from the one end portion 120a to the other end portion 120b of the bar-shaped light guide portion 120. A portion light from of the light source 110 enters the projecting connection portion 122 in the process of propagation from one end portion 120a to another end portion 120b of the bar-shaped portion 116, and this portion of light leaks towards the lateral surface 118c of the plate-shaped part 118 through the connecting surface 122a, and enters the plate-shaped part 118 (see Fig.
    AT) .
    The light which has entered the plate-shaped part 118 through the lateral surface 118c is deflected towards the main surface 118a by the light scattering agent 5 119 dispersed in the plate-shaped part 118. Light is then emitted through the entire main surface
    118a of the plate-like part 118. In this way, when the light source 110 operates, the plate-shaped part
    118 appears as if light were emitted uniformly, from the entire main surface 118a, due to the light scattering function of the light scattering agent 119. At the same time, when the light source
    110 does not work, the plate-shaped part 118 appears transparent. According to a variant, the plate-shaped part
    118 appears slightly colored (e.g. slight white color), depending on the concentration of the light scattering agent 119.
    [0041] FIG. 7 illustrates a cross-sectional shape of a light guide 212 according to a comparative example. Fig. 7 illustrates a section of the light guide 212 along a plane orthogonal to its direction of extension. The light guide 212 has a structure in which a lateral surface 218c of a plate-shaped part 218 is directly connected to a peripheral surface 220c of a bar-shaped part 220.
    In other words, unlike the light guide 112 according to the present embodiment, no shape corresponding to 1a.
    protruding connection part 122 is only present in a connection part 224 in the light guide 212, according to the comparative example. It should be noted that the light guide 212 according to the comparative example has not been made known to the public. The light guide 212 according to the comparative example can be produced by a multi-component double color molding process. wherein the bar-shaped portion 220 serves as the primary molded product, and the plate-shaped portion 218 serves as the secondary molded product.
    FIGS. 8A and. 8B are schematic diagrams illustrating examples of problems which could arise in the molding process of the light guide 212 according to the comparative example.
    [0043] FIG. 8A illustrates an overflow (also known as an overlap) of resin produced at the connecting portion 224. In a double color molding process, a primary molded product, or the bar-shaped portion 220 , is held in advance in a die to mold a secondary molded product, or the plate-shaped part 218. The charge pressure of molten resin widens a gap between the bar-shaped part 220 and. the matrix when the molten resin for forming the plate-like part 218 is poured into the matrix and, in connection therewith, the molten resin can enter the gap. The resin entering the gap solidifies and creates an overlap. Since the resin of the plate-like part 218 partially covers the peripheral surface 220c of the bar-shaped part 220, the cross-sectional shape of the bar-shaped part 220 deviates from the cross-sectional shape of the drawing (p e.g. a circular cross-sectional shape ideal for good light propagation). The 5 loss of spread of. bar shaped part light
    220 resulting from light leakage, blockage of light, or the like, increases, thereby creating a decrease in the amount of light emitted from the plate-like portion 218 or uneven light emission. The above can also affect the light distribution of a vehicle lamp in which the light guide 212 is mounted.
    [0044] FIG. 8B illustrates a crack or detachment produced in the connecting part 224. When an acute angle notch is present in the connecting part 224, a crack or detachment is likely to occur from this notch . When a crack or detachment occurs, the loss of light propagation increases between the bar-shaped part 220 and the plate-shaped part 218, leading to a decrease in. quantity of light emitted by the plate-shaped part 20 218 or with an uneven light emission.
    [0045] Consequently, it is desirable to take countermeasures to remedy this type of problem. F According to study of the present inventors, the problems such as a crack and overlap described above, which may arise in a 25 multicolor molding method for molding the light guide 212, are likely due to the shape of the portion of connection 224, or in other words, to a discontinuous variation between the plate-shaped part 218 and the bar-shaped part 220.
    The light guide 112 according to the present embodiment includes the bar-shaped part 11.6 and the plate-shaped part 118. The bar-shaped part 116 includes the bar-shaped light guide part 120 and the projecting connecting portion 122 projecting from the peripheral surface 120c of the bar-shaped light guide portion 120 and extending along the bar-shaped light guide portion 120. The portion plate form 118 includes the two main surfaces 118a and 118b which are opposite to each other and the lateral surface 118c connecting the main surfaces 118a and 118b. Light guide 112 is a multi-colored molded product in which the bar-shaped part 116 is formed from the first resin material and the plate-shaped part
    118 is formed of the second resin material containing the light scattering agent 119, and the bar-shaped light guide portion 120 is connected to the side surface 118c of the plate-shaped portion 118 through the portion of surface connection 122.
    With the light guide 112 according to the present embodiment, the projecting connection part .122 is interposed between the light guide part in the form of a bar
    120 and the plate-shaped portion 118. The shape of each of the bar-shaped light guide portion 120 and the plate-shaped portion 118 can be optimally designed to provide the desired optical characteristics. At the same time, the shape of the projecting connecting part 122 can be optimally designed to obtain a good connection between the bar-shaped part 116 and the plate-shaped part 118. In this way, the risk of problems such as that an overlap and a crack, which can appear in a multicolored molding process, can be reduced. Reduction in the amount of light emitted from the plate-like portion 118 or uneven light emission can be avoided or mitigated. This ensures the distribution of the light of the vehicle lamp 100 in which the light guide 112 is mounted. The protruding connecting part 122 includes the connecting surface 122a connected to the lateral surface 118c of the plate-shaped part 118 and the two lateral surfaces of the connecting part 122b and 122c arranged at the respective sides of the connecting surface 122a and connecting the connecting surface 122a to the peripheral surface 120c of the bar-shaped light guide part 120. The two lateral surfaces of the projecting part 122b and 122c are flush with the respective main surfaces 118a and 118b of the plate-shaped part 118. In this way, any discontinuous shape variation between the plate-shaped part 118 and the bar-shaped part 116 is eliminated. Consequently, any gap between the bar-shaped portion 116 and the die is less likely to be enlarged by the pressure of molten resin in a multi-color molding process. In addition, an acute angle cut is less likely to occur on the bonding surface 122a. In this way, the risk of problems, such as overlap and cracking, which may appear in a multi-color molding process, can be reduced.
    The vehicle lamp 100 according to, the present embodiment includes the light source 110 and the light guide
    112. The light guide 112 includes the bar-shaped portion 116 and the plate-shaped portion 118, and has a structure in which the peripheral surface 120c of the bar-shaped light guide portion 120 is connected to the lateral surface 118c of the plate-shaped part 118 by the projecting connecting part 122. The plate-shaped part 118 contains the light scattering agent 119. The light coming from the light source 110 enters the bar-shaped light guide portion 1.20 through the light incidence surface of the bar-shaped light guide portion 120, enters the plate-shaped portion 118 from the guide guide portion bar-shaped light 120 through the projecting connecting portion 122, and is emitted through the main surface 118a of the plate-like portion 118 by the light scattering agent 119 (see Fig. 3A).
    Thus, a more uniform surface emission can be obtained from the plate-shaped part 1.18 of the light guide 112, compared to a light guide in which the light entering inside it by a side surface is reflected by a reflective element, such as a facet, provided in a main surface on an interior side of the. lamp, and is emitted through another main surface on an exterior side of the lamp. In addition, the emission uniformity of the surface of the light guide can be improved, and thus a pedestrian, a driver of another vehicle or the like, can visually recognize the emission of the vehicle lamp 100 more reliable. As a result, the visibility of the lamp 100 can be improved. In addition, the conceptual sophistication and appearance of the vehicle lamp 100 can be improved.
    The plate-like part 118 allows. light to be emitted through the main surface 118a by the light scattering agent 119. This makes it unnecessary to carry out an optical check such as adjusting the angle of a reflecting surface, which could , be required when a reflective element is used. As a result, the light guide 112 can be molded more simply, and the manufacturing cost can be reduced. The bar-shaped part 116 and the plate-shaped part 118 are molded in one piece. This makes it possible to increase the efficiency of light propagation from the bar-shaped part 116 to the plate-shaped part 118. In addition, the number of components of the vehicle lamp .100 and the manufacturing cost of the vehicle lamp 100 can be reduced.
    The light from the light source 110 propagates inside the bar-shaped part 116 while undergoing internal reflection between the end part 120a and the end part 120b of the part of bar-shaped light guide 120, and part of the leaking light in the projecting connecting part 122, in the above-mentioned internal reflection process, enters the plate-shaped part 118. As a result, the light in from the light source 110 gradually enters the plate-like part 118 in the process of propagation inside the bar-shaped part 116. This makes it possible to obtain a more uniform surface emission from the part plate shape 118.
    The plate-like part 118 allows the light which has entered inside thereof through the lateral surface 118c to be emitted efficiently by the main surface 118a. Thus, the light source 110 and the bar-shaped part 116 can be arranged in the same plane as the plate-shaped part 118. This makes it possible to reduce the thickness of the vehicle lamp 100, compared to a structure in which a light source is arranged behind a plate-shaped part 118 to allow light to be emitted from the plate-shaped part 118.
    In this embodiment, the light guide
    112 is not provided with either a so-called optical facet or with any other reflecting element. No facet is formed on the peripheral surface 120c of the bar-shaped light guide portion 120, and no facet is formed on the main surfaces 118a and 118b of the plate-shaped portion 118 either. However, if necessary, the light guide 112 can include this reflecting element. For example, a reflective element, such as a metallic film, a facet, or a dome-shaped element, can be provided in the end part 120b of the bar-shaped part 116. This makes it possible to reflect back the front lumen reaches the end portion 120b toward the end portion 120a. As a result, the amount of light emitted from the plate-like portion 118 can be increased. Alternatively, a reflective element may be provided in the end portion 120a or on the peripheral surface 120c of the bar-shaped light guide portion 120. A reflective element may be mounted on the main surface 118a or 118b or on any of the side surfaces 118c to 118f of the plate-like part 118.
    Figs. 9A to 11C illustrate various other examples of the light guide according to certain embodiments. The protruding connecting part of the light guide can hang in different shapes. Figs. 9A to 11C each illustrates a section of the light guide along a plane orthogonal to its direction of extension. Various examples of the light guide according to certain embodiments will be described below, the descriptions being centered on the configurations which differ. from those of the previous embodiment. The common configurations among the embodiments are described briefly, or will be omitted.
    As illustrated in FIGS. 9A to 9D, in a light guide 312 also according to one embodiment, a bar-shaped light guide part 320 is connected to a lateral surface of the plate-shaped part 118 by a projecting connection part 322 The protruding connecting part 322 includes a connecting surface 322a connected to the side surface of the plate-like part 118 and to two side surfaces of the protruding part 322b and 322c, disposed on respective sides of the surface 322a, and connecting the connecting surface 322a to a peripheral surface 320c of the bar-shaped light guide part 320. One or both lateral surfaces of the projecting part 322b and 322c are flush with one or more the two main surfaces 118a and 118b of the plate-shaped part 118. A section of a bar-shaped part 316 along a plane orthogonal to its direction of extension has a shape obtained by combining u ne circular region and a rectangular region. The circular region corresponds to the cross section of the bar-shaped light guide portion 320, and the rectangular region corresponds to the cross section of the protruding connecting portion 322. The rectangular region is adjacent to the circular region and coupled with it. Also in the guide, light 312 according to an embodiment illustrated in FIGS.
    9Ά to 9D, the risk of problems, such as overlap and cracking, which may appear in a multi-color molding process, can be reduced.
    As illustrated in FIG. 9Ά, a lateral surface of the projecting part 322b of the two lateral surfaces of the projecting part 322b and 322c is tangent to the peripheral surface 320c of the bar-shaped light guide part 320. In a case where the part of bar-shaped light guide 320 extends linearly, the lateral surface of the projecting part 322b serves as a planar surface tangent to the peripheral surface 320c of the bar-shaped light guide part 320. In a case where the bar shaped light guide portion 320 extends in a curve, the side surface of the protruding portion 322b serves as a curved surface tangent to the peripheral surface 320c of the bar shaped light guide portion 320. In the light guide section 312 along a plane orthogonal to its direction of extension, the peripheral surface 320c of the bar-shaped light guide portion 320 forms an arc-shaped outline, and the sure lateral face of the projecting part
    322b is therefore tangent to this arc-shaped contour. The side surface of the protruding part 322c, on the opposite side, is connected to the peripheral surface 320c of the bar-shaped light guide part 320 at right angles, or at any other angle.
    In this way, the lateral surface of the projecting part 322b of the projecting connection part 322 forms a planar surface with the peripheral surface 320c of the bar-shaped light guide part 320. No facet 25 n is present between the lateral surface of the projecting part
    322b and the peripheral surface 320c of the shaped light guide portion, of bar 320. The planar surface indicated can be used as the surface against which a die ejection pin abuts when the light guide 312 is unmolded from. matrix in the molding process. A larger stop surface can be secured for the ejection pin, with the light guide 312 according to an embodiment illustrated in FIG. 9A, and an impact influence of the stop can be reduced, compared to the light guide 112 illustrated in FIG. 4B. The possibility of a crack on the bonding surface 322a can be reduced. In addition, compared to the light guide 112, any overlap is more easily eliminated, with the light guide 312, when the bar-shaped part 316 is held more firmly in the matrix, and the rotation of the part in. 316 bar shape in the die is prevented in the molding process.
    As illustrated in FIG. 9B, la. surface, of. link 322a can be inclined relative to the lateral surfaces of the projecting part 322b and 322c. This inclination makes it possible to secure a larger area of the connection surface 322a, compared with the case where the connection surface 322a is orthogonal to the lateral surfaces of the projecting part 322b and 322c. The enlargement of the bonding zone makes it possible to improve the bonding force between the bar-shaped part 316 and the plate-shaped part 118. From the point of view of improving the bonding force, an angle d 'tilt 322d. can be any desired angle, for example, less than 90 degrees or fall, for example, in a range between 45 degrees and 89 degrees. The improved bond strength reduces the possibility of cracking on the 3zza bonding surface.
    The connecting surface 322a is inclined to form an obtuse angle with the lateral surface of the projecting part 322b (that is to say a stop surface for an ejection pin) which is tangent to the surface peripheral device 320c of the bar-shaped light guide part 320 and to form an acute angle with the lateral surface of the projecting part 322c on the opposite side. This inclination can facilitate the demolding of the bar-shaped part 316 of the matrix. From the demolding point of view, the angle of inclination 322d may differ slightly from 90 degrees and may, for example, be less than 90 degrees or be in a range between 85 degrees and 89 degrees.
    From the point of view of improving the bonding force, the inclination can be in any direction, and the bonding surface 322a can be inclined in the opposite direction to that illustrated in FIG. 9B or, in other words, inclined to form an acute angle with the lateral surface of the projecting part 322b and to form an obtuse angle with the lateral surface of the projecting part 322c on the opposite side.
    As illustrated in FIG. 9C, a side surface of the projecting part 322b of the two side surfaces of the projecting part 322b and 322c can be flush with a main surface 118a of the two main surfaces 118a and 118b of the plate-shaped part 118, and the side surface of the projecting part 322c, on the opposite side, need not be flush with the main surface 118b on the opposite side. The base thickness T of the plate-like part 118 is greater than the width A2 of the projecting connecting part 322 and the plate-like part 118 covers the lateral surface of the projecting part 322c of the part of projecting connection 322 to be connected to the peripheral surface 320c of the bar-shaped light guide part 320. In this way, the light guide 312 can have a connected shape obtained by stacking the plate-shaped part 118 on the projecting connection part 322. The bar-shaped portion 316 and the plate-shaped portion 118 can be connected not only to the bonding surface 322a, but also to a portion of the peripheral surface 320c and the side surface of the protruding portion 322c. Thus, the bonding area can be increased, and the bonding strength between the bar-shaped portion 316 and the plate-shaped portion 118 can be improved. Improving the bond strength reduces the possibility of cracking on the bond surface 322a.
    As illustrated in FIG. 9D, the two lateral surfaces of the projecting part 322b and 322c can be tangent to the peripheral surface 320c of the bar-shaped light guide part 320. In a section of the light guide 312 along an orthogonal plane , in its direction of extension, not only the lateral surface of the projecting part 322b, but also the lateral surface of the projecting part 322c, on the opposite side, can be tangent to the peripheral surface 320c.
    As illustrated in FIGS. 10A to 10D, in a light guide 412 also according to one embodiment, a bar-shaped light guide part 420 is connected to a lateral surface of the plate-shaped part 118 by a projecting connection part 422 The projecting connecting part 422 includes a connecting surface 422a connected to the lateral surface of the plate-shaped part 118 and to the two lateral surfaces of the projecting part 422b and 422c arranged on respective sides of the connecting surface. 422a and connecting the connecting surface 422a to a peripheral surface 420c of the bar-shaped light guide part 420. A section of a bar-shaped part 416 along a plane orthogonal to its direction of extension has a shape obtained by combining a circular region and a rectangular region. The circular region corresponds to the cross section of the bar-shaped light guide portion 420, and the rectangular region corresponds to the cross section of the protruding connecting portion 422. The rectangular region is adjacent to the circular region and coupled to it, also without the light guide 412 according to an embodiment illustrated in FIGS. 10A to 10D, the possibility of problems, such as overlapping and cracking, which may appear in a multi-color molding process, can be reduced.
    As illustrated in FIG. 10A, the width A2 of the connecting surface 422a, between one of the two lateral surfaces of the projecting part 4 22b and 422c and the other of the two lateral surfaces of the projecting part 422b and 422c, is greater in design at the base thickness T of the plate-like part 118. A lateral surface of the. projecting part 422c of the two lateral surfaces of the projecting part 422b and 422c is flush with a main surface 118b of the two main surfaces 118a and 118b of the plate-shaped part 118. A facet 426 is therefore provided between the other lateral surface of the projecting part 422b and the main surface 118a. This configuration is an advantage by eliminating an overlap. Even if the bar-shaped part 416, serving as the primary molded product, shrinks slightly on cooling, the width A2 of the connecting surface 422a is greater in design than the base thickness T of the plate-shaped part 118, which eliminates any overflow of molten resin to form the plate-like portion 118 of the bonding surface 422a.
    [0066] Similarly to FIG. 10A, in FIG. 10B, the width A2 of the connecting surface 422a, between one of the two lateral surfaces of the projecting part 422b and 422c and the other of the two lateral surfaces of the projecting part 422b and 422c, is greater in design than the base thickness. T of the plate-shaped part 118. The lateral surfaces of the projecting part 422b and 422c do not lie flush with the main surfaces
    118a and 118b. The facets 426 are provided between the lateral surfaces of the projecting part 422b and 422c and the respective main surfaces 118a and 118b. This configuration also removes any overlap.
    As illustrated in FIG. 10C, a lateral surface of the projecting part 422b of the two lateral surfaces of the projecting part 422b and 422c can be equipped with a shelf-shaped part 428. The shelf-like part 428 is provided to make the width Ά2 of the bonding surface 4 22a greater than the base thickness T of the base part T of the plate in the form of plate 118. This configuration also makes it possible to eliminate any overlap. On the other hand, the shelf-shaped part 428 can be provided on the lateral surface of the projecting part 422c on the affixed side, or can be provided on each lateral surface of the projecting part 422b and 422c.
    As illustrated in FIG. 10D, in addition to the shelf-shaped part 428 provided on the projecting connection part. 422, a shelf-shaped portion 430 can also be provided on the plate-shaped portion 118. Providing the shelf-shaped portion 430 on the plate-shaped portion 118 makes it possible to match a width T ′ of the lateral surface of the plate-shaped part 118, connected to the projecting connecting part 422, with the width A2 of the connecting surface 422a. Providing the shelf-shaped parts 428 and 430, respectively, on the projecting connection part 4 22 and the plate-shaped part 118 results in an increase in the connection area, and makes it possible to improve the bonding force between the bar-shaped portion 416 and the plate-shaped portion 118. Improving the bonding force reduces the possibility of cracking on the bonding surface 422a.
    As illustrated in FIGS. 11A to 11C, in a light guide 512 also according to one embodiment, a bar-shaped light guide part 520 is connected to a lateral surface of the plate-shaped part 118 by a projecting connection part 522 The projecting connecting part 522 includes a connecting surface 522a connected to the lateral surface of the plate-shaped part 118 and to the two lateral surfaces of the projecting part 522b and 522c arranged on respective sides of the connecting surface. 522a and connecting the connection surface 522a to a peripheral surface 520c of the bar-shaped light guide part 520. One or both lateral surfaces of the projecting part 522b and 522c are flush with one or both main surfaces 118a and 118b of the plate-shaped part 118. Also in the light guide 512 according to an embodiment illustrated in FIGS. 11A to 11C, the possibility of problems, such as overlapping and cracking, which may appear in a multi-color molding process, can be reduced.
    In the light guide 512 according to an embodiment illustrated in FIGS. 11Ά to 110, a section of a bar-shaped part 516 along a plane orthogonal to its direction of extension has a shape obtained by combining a circular region and a rectangular region. The circular region corresponds to the cross section of the bar-shaped light guide part 520, and the rectangular region 5 corresponds to the cross section of the protruding connecting part 522. The rectangular region is adjacent to the circular region and coupled with it. The protruding connecting part 522 protrudes, partially in the lateral surface of the plate-shaped part 118. Consequently, the rectangular region corresponding to the protruding connecting part 522 has a shape which partially protrudes towards the lateral surface of the plate-like part 118.
    As illustrated in FIG. 11A, a projecting part
    532 which protrudes towards the side surface of the plate-like part 118 is formed at the connection surface 522a and the connection surface 522a is inclined relative to the side surfaces of the projecting part 522b and 522c. The lateral surface of the plate-shaped part 118 is also inclined according to the inclination of the connecting surface 522a. The protruding part 532 is formed on the side of the one side surface of the protruding part 522b, but instead, the protruding part 532 can be formed on the side of the other side surface of the protruding part projection 522c. This inclination makes it possible to secure a larger area for the connection surface 522a, compared to the case where the connection surface 522a is orthogonal to the lateral surfaces of the projecting part 522b and 522c. The enlargement of the bonding area makes it possible to improve the bonding force between the bar-shaped part 516 and the plate-shaped part 118. From the point of view of improving the bonding force, an angle d the inclination 522d of the protruding part 532 can be any desired angle, and can be, for example, in a range between 1 degree and 45 degrees. Improving the bond strength reduces the possibility of cracking on the bond surface 522a.
    As illustrated in FIG. 11B, the projecting part 532 on the connection surface 522a forms a facet 534 in the connection surface 522a. In one example, the facet 534 is formed at an intermediate position or, in other words, formed at a position which represents one half of the base thickness T of the plate-like part 118 A facet is also formed in the side surface of the plate-like portion 118 in accordance with facet 534, and these facets engage with each other. Also in this way, the bonding force between the bar-shaped portion 516 and the plate-shaped portion 118 is improved, and the possibility of cracking on the bonding surface 522a can be reduced.
    As illustrated in FIG. 11C, the facet 534 formed in the connection surface 522a by the projecting part 532 can be inclined. This inclination or a gradually varying facet makes it possible to attenuate the concentration of the stresses at the level of the connection surface 522a. The protruding part 532 makes it possible to improve the bonding force between the bar-shaped part 516 and the shaped part. plate 118. The present invention is not limited to the preceding embodiments and modifications. The embodiments and modifications may be combined, or other modifications, including different design changes, may be made to the preceding embodiments and modifications, based on the knowledge of those skilled in the art. An embodiment or modification obtained by these combinations or by making other modifications is also included within the scope of the present invention. The preceding embodiments and modifications, and a new embodiment obtained by combining the preceding embodiments and modifications, with the following modifications, exhibit advantageous effects of each of the embodiments, modifications, and other modifications, combined.
    The bar-shaped light guide part 120 is connected to the lateral surface 118c of the plate-shaped part 118 by the projecting connection part 122 of the previous embodiment, but this example is not limiting. The bar-shaped light guide portion 120 can be connected to any of the other side surfaces 118d, 118e, and 118f, of the plate-like portion 118, through the protruding connecting portion 122. In addition , the light guide 112 may include a plurality of. bar-shaped portions 116. Each bar-shaped portion 116 may include the bar-shaped light guide portion 120 and the protruding connecting portion 122. In this case, a bar-shaped light guide portion of a first bar-shaped part can be connected to a first lateral surface of a plate-shaped part by a projecting connecting part, and a bar-shaped light guide part of a second part in A bar shape can be connected to a second lateral surface of the plate-shaped part by a projecting connecting part. The first side surface and the second side surface may be opposite to each other.
    In the previous embodiments, a rear light has been illustrated as an example of the vehicle lamp. However, the vehicle lamp is not limited to a specific type or use, and the present invention can be widely applied to different types of vehicle lamps, including a turn signal, brake light, clearance lamp , a daytime running light, a corner light, a hazard light, a position light, a reverse light, a fog light, and a searchlight.
    权利要求:
    Claims (9)
    [1]
    1. Light guide (112), comprising:
    a bar-shaped portion (116); and a plate-shaped part (118), wherein the bar-shaped part (116) includes a bar-shaped light guide part (120), and a projecting connecting part (122) projecting from a peripheral surface (120c) of the bar-shaped light guide portion (120) and extending along the bar-shaped light guide portion (120), and the plate-shaped portion ( 118) includes two main surfaces (118a, 118b) facing each other, and a side surface of the plate-like portion (118c) connecting the two main surfaces (118a, 118b), the light guide (112) being a product a multicolored mold in which the bar-shaped portion (116) is formed of a first resin material, and the plate-shaped portion (118) is formed of a second resin material containing a light scattering agent (119), the light guide portion (120) being connected to the lateral surface of the shaped portion e of plate (118c) by the projecting connection part (122).
    [2]
    2. A light guide (112) according to claim 1, wherein the protruding connecting portion (122) includes a connecting surface (122a) connected to the side surface of the plate-like portion (118c).
    [3]
    3. Light guide (112) according to claim 2, wherein the projecting connection part (122) includes two
    10 lateral surfaces of the projecting part (122b, 122c) arranged on respective sides of the connection surface (122a) and connecting the connection surface (122a) to the peripheral surface (120c) of the light guide part in the form of a bar (12 0).
    15
    [4]
    4. Light guide (112) according to claim 3, in which one of the two lateral surfaces of the projecting part (122b, 122c) is flush with one of the two main surfaces (118a, 118b) of the plate-shaped part (118 ).
    [5]
    5. Light guide (112) according to claim 3, wherein the two lateral surfaces of the protruding part (122b, 122c) are flush with the respective main surfaces (118a, 118b) of the plate-shaped part (118) .
    light (112) according to any one of claims 3 to
    5, in
    1st o
    Light guide (112) according to claims 3 to
    [6]
    6, in which the projection (122b, 122c) is tangent to the peripheral surface (120c) of the bar-shaped light guide part (120).
    [7]
    8. Light guide (112) according to any one of claims 3 to 7, wherein a width of the connecting surface (122a) is greater than a base thickness of the plate-shaped part (118) , the width being a distance between the two lateral surfaces of the projecting part (122b, 122c).
    [8]
    9. Light guide (112) according to any one of
    20 claims 1 to 8, wherein the projecting connecting portion (122) partially protrudes into the side surface of the plate-like portion (118c).
    [9]
    10. Vehicle lamp (100), comprising:
    the light guide (112) according to any one of claims 1 to 9; and a light source (110), in which:
    the light source (110) is configured to emit light, the light entering the light guide portion
    5 in the form of a bar (120) through a light incidence surface (120a) of the bar-shaped light guide part (120), entering the plate-shaped part (118), from the plate-shaped light guide portion (120), through the projecting connection portion (122), and being emitted, at
    10 through the main surfaces (118a, 118b) of the plate-like portion (118) by the light scattering agent (119).
    类似技术:
    公开号 | 公开日 | 专利标题
    FR3070071A1|2019-02-15|GUIDE LIGHT AND LAMP VEHICLE
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    FR2851030A1|2004-08-13|VEHICLE HEADLIGHT WITH SOURCE, REFLECTOR AND LENS
    EP2518392A2|2012-10-31|Signalling device with stop and position functions using a light guide and generating a 3D effect
    EP1443265A1|2004-08-04|Light guide provided with reflectors
    FR2841967A1|2004-01-09|VEHICLE LAMP WITH INTERNAL REFLECTION
    EP1881263A1|2008-01-23|Lighting or signalling device comprising a curved light guide
    EP3273149B1|2021-10-20|Light module for a motor vehicle
    FR2841966A1|2004-01-09|VEHICLE LAMP WITH LOW DEPTH REFLECTOR
    EP0947761A1|1999-10-06|Signaling light with several light sources
    FR2878938A1|2006-06-09|LIGHTING MODULE FOR MOTOR VEHICLE PROJECTOR
    FR2852379A1|2004-09-17|Vehicle lamp, has coupling unit with optical waveguide units that are formed with ellipsoidal surface with two focuses and coupled in series by coupling part
    FR3070070A1|2019-02-15|ROD-SHAPED LIGHT GUIDE AND VEHICLE LAMP
    FR3042258A1|2017-04-14|TRANSPARENT LIGHT ELEMENT WITH MULTIPLE LIGHT SOURCES AND A COMMON EXIT SIDE
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    FR3092048A1|2020-07-31|Linear lighting device
    EP2650600A1|2013-10-16|Lightguide for a light-emitting device of a motor vehicle
    EP2703220B1|2016-12-21|Lighting and/or signalling device for an automobile
    FR2977654A1|2013-01-11|LIGHTING DEVICE FOR A VEHICLE WITH A COVER PLATE OBLIGED SUBJECT TO THE DIRECTION OF DISPLACEMENT
    FR2815589A1|2002-04-26|Signal light unit for an automotive vehicle, has a compact design especially with regard to its width
    EP3628914B1|2022-01-12|Optical unit with dual signalling and lighting function
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    FR3101695A1|2021-04-09|Optical system, and optical element for shaping an optical beam and corresponding lighting, signaling and / or cosmetic device
    同族专利:
    公开号 | 公开日
    US10520155B2|2019-12-31|
    JP6967394B2|2021-11-17|
    CN208859536U|2019-05-14|
    JP2019033044A|2019-02-28|
    US20190049086A1|2019-02-14|
    CN109386816A|2019-02-26|
    DE102018213317A1|2019-02-14|
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    JP6967394B2|2017-08-09|2021-11-17|株式会社小糸製作所|Light guide and vehicle lighting|JP6967394B2|2017-08-09|2021-11-17|株式会社小糸製作所|Light guide and vehicle lighting|
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    法律状态:
    2020-07-15| PLFP| Fee payment|Year of fee payment: 3 |
    2020-09-25| PLSC| Publication of the preliminary search report|Effective date: 20200925 |
    2021-07-15| PLFP| Fee payment|Year of fee payment: 4 |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2017154610|2017-08-09|
    JP2017154610A|JP6967394B2|2017-08-09|2017-08-09|Light guide and vehicle lighting|
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