巴西专利BR112015029325B1 VEHICLE LAMP

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专利摘要:
vehicle lamp. a vehicle lamp (30) comprises a light source (32) mounted on a vehicle body (11) and a light guide body (33) for guiding the light generated by the light source (32). in the light guide body (33), vertically to a light path direction, a plurality of recess-shaped portions (33a to 33l) are formed in a row. the recess-shaped portions (33a to 33l) become narrower in pitch as the distance from the light source (32) increases, and are formed deeper as the distance from the light source (32) increases. ) increases. preferably, the recessed portions (33a to 33l) have arc cross sections having the same radius of curvature and the depths of the recessed portions (33a to 33l) are specified by the central angles of the arc cross sections.
公开号:BR112015029325B1
申请号:R112015029325-5
申请日:2014-05-19
公开日:2022-01-11
发明作者:Akira Yamada；Shunsuke Iwao；Koji Ueda；Ryo Chijimatsu
申请人:Honda Motor Co., Ltd.；
IPC主号:

专利说明:

Technical Field
[0001] The present invention relates to an improved lamp for vehicles. Background Technique
[0002] Among the known techniques related to vehicle mounted lamps (i.e. vehicle lamps), one is disclosed in Patent Literature 1.
[0003] The vehicle lamp disclosed in Patent Literature 1 is to be used as a flasher of an automotive vehicle, and includes a light source and light guide member to guide the light emitted by the light source. The light-guiding member has a plurality of recess-shaped portions formed therein perpendicular to a direction of the light path. Steps between the recessed portions progressively narrow or decrease as distances from the light source from the recessed portions to the light source increase, i.e. with increasing distance from the light source .
[0004] Light within the light guide member is reflected towards the outside at positions where recess-shaped portions are formed. The light energy is large in the vicinity of the light source, and therefore sufficient light can be guaranteed with a small number of the recessed portions formed in that vicinity. Light energy decreases with increasing distance from the light source. Therefore, in such a distant area, a greater number of recess-shaped portions are formed, so that more light can be reflected, and thus a necessary light can be guaranteed. With the vehicle lamp constructed as above, the entire light guide member can be evenly illuminated.
[0005] Such a vehicle lamp has a function of allowing a person (or persons) outside the vehicle to recognize (recognise) the vehicle. In order to allow a person outside the vehicle to recognize the vehicle, it is desirable that the light guide member can be illuminated uniformly, and in various lighting styles. Prior Art Literature Patent Literature
[0006] Patent Literature 1: Japanese Patent Application Open for Public Inspection Number 2005-2667928. Summary of the Invention Technical problem
[0007] Therefore, it is an objective to provide a technique that can freely control a degree of brightness (brightness and darkness) of the light emitted from a vehicle lamp. Solution of the problem
[0008] In accordance with one aspect of the present invention, there is provided an improved vehicle lamp, including a light source mounted on a vehicle body, and a light-guiding member, for guiding the light emitted by the light source, characterized in that the light-guiding member has a row of a plurality of recess-shaped portions formed therein substantially perpendicular to a direction of the path of light emitted by the light source, and the recess-shaped portions are formed such that as the distances from the light source of the individual portions of the recessed portions increase, the pitches between the recessed portions decrease and the depths of the recessed portions increase.
[0009] Preferably, each of the plurality of recess-shaped portions has an arched section with the same radius of curvature, and the depth of each of the recess-shaped portions is defined by a central angle of the arched section .
[00010] Preferably, each of the recess-shaped portions comprises a pair of opposing surfaces formed in a linear symmetrical relationship to each other, so that the opposing surfaces extend from a point, gradually moving away from each other, and, as seen, perpendicular to a surface where the recessed portions are formed, the respective edges of the pair of opposing surfaces forming a line corresponding to a part of a half parabola.
[00011] Preferably, each of the recess-shaped portions comprises a pair of opposing surfaces in a linear symmetrical relationship to each other, so that the opposing surfaces extend from a point gradually away from each other, and , as seen, perpendicular to a surface where recess-shaped portions are formed, the respective edges of the pair of opposing surfaces forming a line corresponding to at least a part of a line of an ellipse divided into a quarter along the long and short axes of the same.
[00012] Preferably, as seen in a section taken along an arranged direction of the plurality of recess-shaped portions, the portions between recess-shaped portions are each formed straight or substantially straight, so that light does not escape out of the light guide member.
[00013] Preferably, the depths of the recess-shaped portions are set in a range of 0.01 μm to 25.00 μm and the steps between the recess-shaped portions are set equal to or greater than a lower limit value of 0 .1 mm. Advantageous Effects of the Invention
[00014] In accordance with the present invention, the recessed portions are formed in such a way that as the distances from the light source of individual recessed portions increase, the pitches between the recessed portions increase. recessed portions decrease, and the depths of recessed portions increase. Light within the light-guiding member is reflected outwardly at positions where recess-shaped portions are formed. As the light energy is large in the vicinity of the light source, sufficient brightness can be guaranteed by only a small number of recess-shaped portions formed shallowly or with a small depth in that vicinity. On the other hand, light energy decreases with increasing distance from the light source. In such a portion away from the light source, a greater number of recess-shaped portions with greater or deeper depths are formed. With the provisions mentioned above it is possible to guarantee the necessary clarity. By adjusting the pitches and depths of the recessed portions, it is possible to lightly illuminate a portion of the light guide member furthest from the light source and to lightly illuminate the middle longitudinal portion of the light guide member. Thus, the present invention can freely control a degree of brightness (brightness and darkness) of the light and improve the quality of the external appearance.
[00015] Furthermore, according to the present invention, the plurality of recessed portions each have an arcuate section. If each of the recessed portions is shaped to have a cross section, the light tends to be reflected in similar directions. As a result, the vehicle lamp appears bright or dark depending on the angle at which it is viewed from the outside. In contrast, in the present invention, each of the recessed portions has a curved section so that light is reflected in various directions. In this way, the vehicle lamp can be illuminated with substantially uniform brightness regardless of the angle from which it is viewed from the outside. Thus, the vehicle lamp can have a high visibility from the outside.
[00016] Furthermore, according to the present invention, the respective edges of the pair of opposing surfaces of the recess-shaped portion form a line corresponding to a part of a half parabola. If the recess-shaped portion is shaped to have a cross section, light tends to be reflected in similar directions. As a result, the vehicle lamp appears bright or dark depending on the angle at which it is viewed from the outside. On the contrary, in the present invention, each of the recessed portions has an arcuate section, so that light is reflected in various directions. In this way, the vehicle lamp can be illuminated with substantially uniform brightness, regardless of the angle at which it is viewed from the outside. Thus, the vehicle lamp can provide a high visibility to the outside.
[00017] Furthermore, in accordance with the present invention, the respective edges of the pair of opposing surfaces of the recess-shaped portion form a line corresponding to at least a part of a line of an ellipse divided into a quarter, along long axis and short axis thereof. If the recess-shaped portion is shaped to have a cross section, light tends to be reflected in similar directions. As a result, the vehicle lamp appears bright or dark, depending on the angle at which it is viewed from the outside. On the contrary, in the present invention, each of the recessed portions has an arcuate section, so that light is reflected in various directions. In this way, the vehicle lamp can be illuminated with substantially uniform brightness, regardless of the angle at which it is viewed from the outside. Thus, the vehicle lamp can have a high visibility from the outside.
[00018] Further, in accordance with the present invention, as seen in a section taken along an arranged direction of the plurality of recess-shaped portions, the portions between the recess-shaped portions are each formed straight or substantially straight, so that light does not escape out of the light guide member. On straight or substantially straight formed surface portions, light is not reflected away from the light-guiding member. In this way, it is possible to reduce the loss of light energy that occurs between the recessed portions, and therefore to finely control the degree of brightness (brightness and darkness) of the light.
[00019] Furthermore, according to the present invention, the depths of the recess-shaped portions are set in the range of 0.01 μm to 25.00 μm, and the steps between the recess-shaped portions are set equal to or greater than a lower limit value of 0.1 mm. It has been found that the external appearance quality of the light guide member, when the light source is OFF or in a non-illuminated state, has a tendency to degrade as the depth of the recessed portion increases beyond of 25.00 μm. Such a degradation of the external appearance quality is considered to be due to the fact that the recess-shaped portion looks like a line because it is deep. Thus, it is preferable that the depth of the recessed portion be 0.01 µm or more, still 2.00 µm or less.
[00020] It was also found that if the pitch between the recessed portions is 0.01 mm or less, the external appearance quality of the light guide member, when the light source is in the unilluminated state, has a tendency to degrade. Such degradation of external appearance quality is considered to be due to the fact that even where the recess-shaped portions are shallow or have a small depth, the light-guiding member is undesirably blurred, as the recess-shaped portions are undesirably blurred. recess are located very close to each other. Therefore, it is preferred that the pitch between the recessed portions is 0.10 mm or more.
[00021] Because the depths of the recess-shaped portions are set in a range of 0.01 μm to 25.00 μm and the steps between the recess-shaped portions are set equal to or greater than the lower limit value of 0.1 mm, the present invention improves the external appearance quality of the light guide member when the light source is in a non-illuminated state. Specifically, the present invention can provide a vehicle lamp that has a very high external appearance quality both when the light source is in the illuminated state and when the light source is in the non-illuminated state. Brief Description of Drawings
[00022] Figure 1 is a perspective view of a vehicle on which a first embodiment of a vehicle lamp of the present invention is mounted;
[00023] Figure 2 is a perspective view of the position lamp shown in Figure 1;
[00024] Figure 3 is a sectional view taken along line 33 of Figure 2;
[00025] Figure 4 is an enlarged view of the sections shown in 4(a) to 4(c) in Figure 3;
[00026] Figure 5 is a graph showing the relationship between the formed positions of the individual recess-shaped portions and depths of the recess-shaped portions;
[00027] Figure 6 is an explanatory view of the operation of the recessed portions shown in Figure 3;
[00028] Figure 7 is a view showing a test piece of a light guide member, which was used in experiments conducted for depths and pitches of the recessed portions shown in Figure 3;
[00029] Figure 8 is an explanatory graph of a modification of the relationship between the formed positions of the Individual recessed portions and the depths of the recessed portions shown in Figure 5;
[00030] Figure 9 is an explanatory view of a modification of the recess-shaped portion shown in Figure 6;
[00031] Figure 10 is an enlarged view showing recessed portions employed in a second embodiment of the vehicle lamp of the present invention; and
[00032] Figure 11 is an enlarged view showing recessed portions employed in a third embodiment of the vehicle lamp of the present invention. Description of Modalities
[00033] Now, embodiments of the present invention will be described with reference to the accompanying drawings in relation to a case where a vehicle lamp of the invention is applied to a position lamp for a vehicle. Mode 1
[00034] As in Figure 1, a headlight unit is mounted on a front section of a vehicle body 11, which constitutes the frame of the vehicle 10. The headlight unit 20 includes: a tall lamp bulb 21, for illuminating a area in front of vehicle 10; a low lamp bulb 22, for illuminating an area to and from the vehicle 10, and a position lamp 30 (vehicle lamp 30) provided to surround the high lamp bulb 21 and low lamp bulb 22.
[00035] Position lamp 30 is provided to enable a person outside the vehicle to readily recognize vehicle 10. With reference to Figure 2, and subsequent figures, a detailed description will be given with respect to position lamp 30.
[00036] As shown in Figure 2, the position lamp 30 includes: a housing 31; a light source 32, in the form of an LED, accommodated in the housing 31; and a generally Y-shaped light-guiding member 33 provided adjacent the light source 32.
[00037] The light guide member 33, which is formed for example of acrylic, curves slightly as a whole along the contour of a body part and vehicle 11. The light guide member 33 has a plurality of portions recessed portions 33a to 33l formed therein perpendicular to a direction of the path of light emitted by light source 32. The recessed portions 33a to 33l differ from each other in depth.
[00038] In the present invention, the positions where the recessed portions 33a to 33l (positions formed of the recessed portions 33a to 33l) and respective depths of the recessed portions 33a to 33l are particularly important. The recess-shaped portions 33a to 33f and the recess-shaped portions 33g to 33l are based on the same technical idea of the invention, and thus, the recess-shaped portions 33a to 33f will be described in detail below with a detailed description. over recessed portions 33g to 33l, omitted to avoid unnecessary duplication.
[00039] The recess-shaped portions 33a to 33l only need to be notch-shaped. Specifically, the recessed portions 33a to 33l need not necessarily be recessed. The light-guiding member 33 and the recessed portions 33a to 33f will be detailed further below with reference to Figure 3 and subsequent figures.
[00040] As shown in Figure 3, recess-shaped portions 33a to 33f are formed in a rear surface section Re of the light-guiding member 33. A front surface section Fr and side surface sections Si of the light-guiding member 33. light guide 33 are formed as flat surfaces. The upper and lower surface sections of the light guide member 33 are also formed as flat surfaces.
[00041] The distances between the individual recessed portions 33a to 33f will be referred to as "steps". Steps P1 to P5 narrow or decrease as distances from the light source 32 from the recessed portions 33a to 33f increase; that is, the steps P1 to P5 decrease with increasing distance from the light source 32. Furthermore, the respective depths D1 to D6 of the recess-shaped portions 33a to 33f increase as the distances from the light source 33a to 33f increase. of light 32, of the recessed portions 33a to 33f increase; that is, the recess-shaped portions 33a to 33f are formed deeper with increasing distance from the light source 32. Steps P1 to P5 between the recess-shaped portions 33a to 33f are measured by measuring the distances between the respective deepest parts of the recessed portions 33a to 33f.
[00042] A portion of the back surface between the recess-shaped portion 33a and the recess-shaped portion 33b is formed straight (i.e., as a straight surface), in the illustrated example of Figure 3. In fact, however, in that the light-guiding member 33 extends along the contour of a vehicle body part 11 (Figure 1), the rear surface portion between the recess-shaped portion 33a and the recess-shaped portion 33b curve slightly. The curvature of the rear surface portion between the recess-shaped portion 33a and the recess-shaped portion 33b is set in such a way that light displacing in the light-guiding member 33 does not escape out of the light-guiding member. 33. The rear surface portions, between the other recess-shaped portions, are formed similarly to the rear surface portion between the recess-shaped portion 33a and the recess-shaped portion 33b. Specifically, the back surface portions between the recessed portions 33a to 33e and the recessed portions 33b to 33f are formed substantially straight so that light traveling in the light guide member 33 does not escape outward. of the light guide member 33.
[00043] Figure 4(a) shows, in enlarged scale, a section surrounded by 4a in Figure 3. Similarly, Figure 4(b) shows, in enlarged scale, a section surrounded by 4b in Figure 3, and Figure 4(c) shows, on a larger scale, a section surrounded by 4c in Figure 3.
[00044] As shown in Figure 4(a), the recessed portion 33a is shaped so that the arcuate back surfaces, each having a radius Y and a central angle θ1, are opposite each other. Specifically, the recessed portion 33a comprises two opposite arcuate back surfaces, and such opposing arcuate back surfaces have the same radius and the same central angle. The other recessed portions 33b to 33l are shaped substantially similarly to the recessed portion 33a.
[00045] As shown in Figure 4(b), the recess-shaped portion 33d is shaped so that the arcuate back surfaces, each having a radius y and a central angle θ4, are opposite each other. Furthermore, as shown in Figure 4(c), the recessed portion 33f is shaped so that the arcuate rear surfaces, each having radius y and a central angle θ6, are opposite each other. The central angle θ6 is 90°, which is the largest angle the central angle θ can take.
[00046] As seen in Figures 4(a) to 4(c), the depths D1, D4 and D6 of the recess-shaped portions 33a, 33d and 33f have a relationship of D1 < D4 < D6, and the central angles θ1 , θ4 and θ6 of the recessed portions 33a, 33d, and 33f have a relationship of 0°<θ i 90°e θ1 <θ4 <θ6.
[00047] Referring also to Figure 3, the plurality of recess-shaped portions 33a to 33f each have an arcuate section with the same radius of curvature Y and depths D1 to D6 of the recess-shaped portions 33a to 33f are defined or determined by the central angles θ of the arcuate sections of the recessed portions 33a to 33f.
[00048] Figure 5 shows the relationship between the distances from the light source of the individual recessed portions 33a to 33f and the depths of the recessed portions 33a to 33f. Specifically, in Figure 5, the distances from the light source of the individual recessed portions 33a to 33f are plotted on the horizontal axis and the depths of the recessed portions 33a to 33f are plotted on the vertical axis.
[00049] Referring also to Figure 3, in the case where the distances from the light source of the individual recess-shaped portions 33a to 33f and the depths of the recess-shaped portions 33a to 33f are in the In the relationship shown in Figure 5, the position lamp 30 shown in Figure 3 is illuminated with the greatest intensity in a portion distant from the light source 32, i.e., in the vicinity of the recess-shaped portion 33f.
[00050] The way of lighting the position lamp 30 can be modified by changing the slopes of a curve of the graph shown in Figure 5, with the condition that the steps P1 to P5 are set to narrow or decrease, and the depths D1 to D6 are set to increase as the distances from the light source of the individual recessed portions 33a to 33f increase; specifically, P1 > P2 > P3 > P4 > P5, and D1 < D2 < D3 < D4 < D5 < D6.
[00051] Specifically, light within the light-guiding member 33 is reflected to the outside (represented at Fr in Figure 3) of the light-guiding member 33 at positions where portions 33a to 33f are formed. Because the light energy is large in the vicinity of the light source 32, sufficient brightness can be guaranteed in the vicinity of the light source 32 with a small number of recess-shaped portions (eg, recess-shaped portion 33a) , formed at a shallow or shallow depth nearby.
[00052] On the other hand, the light energy decreases with increasing distance from the light source 32. In such a distant portion of the light source 32, a greater number of recess-shaped portions (eg, recess-shaped portions 33e and 33f) are formed at greater or deeper depths.
[00053] With the above-mentioned arrangement, it is possible to guarantee the necessary clarity. By adjusting the steps P1 to P5 and depths D1 to D6 of the recess-shaped portions 33a to 33f, it is possible to lightly illuminate a portion of the light guide member 33 farthest from the light source 32. Furthermore, it is possible to lightly illuminate a portion longitudinal mean of the light guide member 33. In this way, it is possible to freely control a degree of brightness (brightness and darkness) of the light and improve the external appearance of the vehicle lamp.
[00054] In a comparative example, shown in Figure 6(a), a recess-shaped portion 133 is shaped to have straight surfaces. Because of the straight surfaces, light tends to reflect off the recessed portion 133 in similarly fixed directions as indicated by arrows; light can be easily reflected in some directions, but hardly reflected in other directions. As a result, the position lamp 130 appears bright or dark, depending on the angle at which it is viewed from the outside.
[00055] As shown in Figure 6(b), each of the recess-shaped portions 33a to 33f in the present embodiment, on the other hand, have arcuate sections, so that light is reflected in various directions, as indicated by arrows . In this way, the position lamp 30 can be illuminated with substantially uniform brightness regardless of the angle at which it is viewed from the outside. Thus, the position lamp 30 can have great visibility from the outside.
[00056] Referring also to Figure 3, the surface portions between the recess-shaped portions 33a to 33e and the surface portions 33b to 33f are formed straight as can be seen in section or formed substantially straight as can be seen viewed in section, so that light does not escape from the light-guiding member 33. In straight or substantially straight formed surface portions, light is not reflected away from the light-guiding member 33. In this way, it is possible to reduce the energy of light occurring between the recessed portions 33a to 33f and therefore finely controlling the degree of brightness (brightness and darkness) of the light.
[00057] The inventors of the present invention have found that the degree of brightness (brightness and darkness) of the light and the external appearance of the vehicle lamp 30 can be freely controlled by adjusting the depths and pitches of the recessed portions. The light guide member is a component part, which is visible from outside the vehicle when the light source is off (i.e., in a non-illuminated state), such as during the day. It has also been found that if the depths of the recess-shaped portions are too deep and the steps between the recess-shaped portions are too short, the recess-shaped portions would undesirably look like lines, and the light-guiding member would undesirably look like blurry. If the light guide member appears so blurry, the external appearance of the light guide member, and therefore the vehicle lamp, would be affected. For these reasons, the inventors of the present invention have conducted the following experiments with a view to providing an improved vehicle lamp that has a better quality of external appearance even when the light source is OFF, or in an unlit state.
[00058] Figure 7 shows a test piece 43 of the light guide member that was used in the experiments. Test piece 43 has recess-shaped portions 43a, each having a depth (depth of recess-shaped portion) of a (μm) formed therein with a pitch of b (mm). Specifically, in the test piece 43, the recessed portions 43a have the same depth (depth of the recessed portion) a (μm) and the same pitch b (mm).
[00059] The experiments were carried out using a plurality of test pieces 43 made with depth a (μm) and pitch b (mm) differentiated between test pieces 43. More specifically, the experiments were conducted measuring mist values of test pieces 43. If the haze value is less than 50, the light-guiding member is evaluated or determined to be acceptable because it is not hazy, or even if hazy, does not substantially influence the external appearance of the light-guiding member. If the haze value is 50 or more, on the other hand, the light guide member is determined to be unacceptable as it substantially influences the external appearance of the guide member. The results of the experiments are shown below: TABLE 1

[00060] As shown in Table 1 above, in the case where the recess-shaped portion depth was 0.01 (μm) and the pitch 0.01 (mm), the mist value was less than 5.0. Under these conditions, the light-guiding limb had a high quality of external appearance, and was determined to be acceptable (○).
[00061] Similarly, in the case where the depth of the recess-shaped portion was 0.01 (μm) and the pitch was 0.05, 0.10, 0.20, 0.30 or 0.50 (mm), the light guide member was determined to be acceptable (o).
[00062] Furthermore, in the case where the depth of the recess-shaped portion was 1 (μm) and the pitch was 0.01, 0.05, 0.10, 0.20, 0.30 or 0.50 (mm ), the light guide member was determined to be acceptable (o).
[00063] Furthermore, in the case where the depth of the recessed portion was 5.0 (μm) and the pitch 0.1 (mm), the mist value was 5.0 or more. Under these conditions, the light guide member was blurred and determined to be unacceptable (x).
[00064] On the other hand, in the case where the depth of the recess-shaped portion was 5.0 (μm) and the pitch was 0.05, 0.10, 0.20, 0.30 or 0.50 (mm ), the light guide member was determined to be acceptable (o).
[00065] Furthermore, in the case where the depth of the recess-shaped portion was 10.0 (μm) and the pitch was 0.01 (mm), the light guide member was determined to be unacceptable (x).
[00066] On the other hand, in the case where the depth of the recess-shaped portion was 10.00 (μm) and the pitch was 0.05, 0.10, 0.20, 0.30 or 0.50 (mm ), the light guide member was determined to be acceptable (o).
[00067] Furthermore, in the case where the depth of the recess-shaped portion was 20.00 (μm) and the pitch was 0.01 (mm), the light-guiding member was determined to be unacceptable (x).
[00068] On the other hand, in the case where the depth of the recess-shaped portion was 20.00 (μm) and the pitch was 0.05, 0.10, 0.20, 0.30 or 0.50 (mm ), the light guide member was determined to be acceptable (o).
[00069] Furthermore, in the case where the depth of the recess-shaped portion was 25.00 (μm) and pitch was 0.01 or 0.05 (mm), the light guide member was determined to be unacceptable (x ).
[00070] On the other hand, in the case where the depth of the recess-shaped portion was 25.00 (μm) and the pitch was 0.10, 0.20, 0.30 or 0.50 (mm), the member -guide light has been determined to be acceptable (o).
[00071] Furthermore, in the case where the depth of the recess-shaped portion was 30.00 (μm) and the pitch was 0.01, 0.05 or 0.10 (mm), the light guide member was determined to be unacceptable (x).
[00072] On the other hand, in the case where the depth of the recess-shaped portion was 30.00 (μm) and the pitch was 0.20, 0.30, or 0.50 (mm), the guide member of light was determined to be acceptable (o).
[00073] With the results of the above experiments, it was found that the quality of the external appearance of the light guide member, when the light source is in the unilluminated state, has a tendency to degrade as the depth of light increases. recessed portion increases beyond 25.00 μm. Such a degradation of external appearance quality is considered to be due to the fact that the recessed portion 43a, being deep, appears to be a line. Therefore, it is preferred that the depth of the recessed portion 43a be 0.01 µm or more, still 25.00 µm or less.
[00074] Also, it has been found that if the pitch between the recess-shaped portions 43a is 0.01 mm or less, the quality of the external appearance of the light guide member when the light source is in the undisturbed state. illuminated, has a tendency to degrade. Such a degradation of the quality of the external appearance is considered to be due to the fact that even with the recess-shaped portions 43a being relatively shallow in depth, the light-guiding member is blurred by the recess-shaped portions 43a being blurred. located very close to each other. Therefore, it is preferred that the pitch between the recessed portions 43a is 0.10 mm or more.
[00075] Although the experiments were conducted only up to the pitch of 0.5 mm, it is considered for the reasons mentioned that the quality of the external appearance of the light guide member when the light source is in the unilluminated state, does not matter. would degrade even if the pitch between the recessed portions is increased beyond 0.5 mm. Therefore, it is considered that a high quality of the light-guiding member's external appearance can be guaranteed if 0.1 mm is set as a lower threshold value for the pitch.
[00076] The depths of the recess-shaped portions 43a are set in a range of 0.01 to 25.00 μm, and the pitches between the recess-shaped portions 43a are set equal to or greater than the lower limit value of 0 .10 mm. In this way, it is possible to improve the quality of the external appearance of the light guide member when the light source is in the non-illuminated state. Specifically, it is possible to provide a vehicle lamp having a high quality of external appearance in both situations, when the light source is in the illuminated state, and also when the light source is in the non-illuminated state.
[00077] Figure 8 shows a modification of the relationship between the distances from the light source of the individual recessed portions and the depths of the individual recessed portions. In Figure 8, the horizontal axis represents the distances from the light source, while the vertical axis represents the depths of the individual recessed portions.
[00078] The curve of the graph in the modified relationship shown in Figure 8 has a different slope to the curve of the graph shown in Figure 5. With the slope of the curve shown in Figure 8, it is possible to change the way in which the light bulb position (30 in Figure 3) is illuminated. More specifically, with the slope shown in Figure 8, the longitudinal middle portion of the light-guiding member 33 can be lightly illuminated.
[00079] Also according to the modification, the steps P11 to P15 between the recess-shaped portions (33a to 33f in Figure 3) are set to narrow (decrease) and the depths D11 to D16 of the recess-shaped portions are set to increase as the distances from the light source (32 in Figure 3) of the individual recessed portions increase; specifically P11 > P12 > P13 > P14 > P15, and D11 < D12 < D13 < D14 < D15 < D16.
[00080] By adjusting the pitches and depths of the recess-shaped portions, the entire position lamp can be illuminated evenly, and also the brightness degree (brightness and darkness) of the position lamp can be freely controlled.
[00081] As in Figure 9, the recessed portion 33m comprises opposing arcuate surfaces spaced from one another, as seen in section. The bottoms, i.e. the deepest parts of the opposing arcuate surfaces are interconnected by a straight line portion. In the recess-shaped portion 33m, the middle part of the recess-shaped portion is a step reference point. Even with the recessed portion 33m shaped in this way, it is possible to obtain the predetermined advantageous benefits of the present invention. Mode 2
[00082] Next, with reference to Figure 10, a second embodiment of the present invention is described. Figure 10(a) shows, on an enlarged scale, primary sections of a light-guiding member employed in the second embodiment of the vehicle lamp of the present invention. Figure 10(b) shows a modification of the light guide member employed in the second embodiment of the vehicle lamp of the present invention. Figures 10(a) and 10(b) each correspond to Figure (4c).
[00083] The second embodiment of the vehicle lamp 50, 60 is different from the first embodiment of the vehicle lamp (30 in Figure 2) in terms of the shapes of the recess-shaped portions (33a to 33f in Figure 4). The other basic structural aspects of the second embodiment of the vehicle lamp 50, 60 are similar to those of the first embodiment of the vehicle lamp. The same elements of the first embodiment are represented by the same reference characters used in the first embodiment, and therefore will not be described in detail here, to avoid unnecessary duplication.
[00084] As shown in Figure 10(a), the recessed portion 53a is formed perpendicular to the direction of the light path emitted by the light source (32 in Figure 2). Specifically, the recess-shaped portion 53a is formed from the rear surface toward the front surface of the light-guiding member 53. Furthermore, as the light-guiding member 53 is viewed in plan, the recess-shaped portion 53a comprises a pair of opposing surfaces formed in linear symmetrical relationship to each other so that the two surfaces extend from a point gradually away from each other. As seen in plan (ie, viewed in a direction perpendicular to the surface where the recess-shaped portion 53a is formed), the respective edges of the two surfaces (ie, edge of the recess-shaped portion 53a) together form a line corresponding to to a part of the parable divided in two.
[00085] The recess-shaped portion 63a shown in Figure 10(b) is substantially similar to the recess-shaped portion 53a shown in Figure 10(a). Specifically, the recessed portion 63a is formed perpendicular to the direction of the light path emitted by the light source. Specifically, the recess-shaped portion 63a is formed from the rear surface towards the front surface of the light-guiding member 63. Furthermore, as the light-guiding member is viewed in plan, the recess-shaped portion 63a comprises a pair of opposing surfaces formed in a linear symmetrical relationship to each other, so that the two surfaces extend from a point, gradually moving away from each other. As seen in plan, the respective edges of the two surfaces form a line that corresponds to a part of a parabola divided in two.
[00086] With such recessed portions 53a and 63a as well, it is possible to obtain the predetermined advantageous benefits of the present invention. The recess-shaped portion 53a of a more pronounced arcuate shape is more preferable than the recess-shaped portion 63a, as it can more efficiently scatter light from the light source. Mode 3
[00087] Next, with reference to Figure 11, a third embodiment of the present invention is described. Figure 11(a) shows in enlarged scale primary sections of a light-guiding member employed in the third embodiment of the vehicle lamp of the present invention. Figure 11(b) shows a modification of the light guide member employed in the third embodiment of the vehicle lamp of the present invention. Figures 11(a) and 11(b) each correspond to Figure 4(c).
[00088] The third embodiment of the vehicle lamp 70, 80 is different from the first embodiment of the vehicle lamp (30 in Figure 2) in terms of the shape of the recess-shaped portions (33a to 33f in Figure 4). The other basic structural aspects of the third embodiment of the vehicle lamp 70, 80 are similar to those of the first embodiment of the vehicle lamp. The same elements of the first embodiment are represented by the same reference characters used for the first embodiment, and will not be described in detail here.
[00089] As shown in Figure 11(a), the recess-shaped portion 73a is formed perpendicular to the direction of the light path emitted by the light source (32 in Figure 2). Specifically, the recess-shaped portion 73a is formed toward the rear surface toward the front surface of the light-guiding member 73. The recess-shaped portion 73a comprises a pair of opposing surfaces formed in a linear symmetrical relationship with each other. the other, so that the two surfaces extend from a point (ie, the deepest point of the recess) gradually away from each other. As seen in plan (ie, as seen in the direction perpendicular to the surface where the recess-shaped portion 73a is formed) the respective edges of the two surfaces (ie, the edge of the recess-shaped portion 73a) form a line corresponding to at least a part of a line of an ellipse divided into a quarter, along its long and short axes.
[00090] The recess-shaped portion 83a shown in Figure 11(b) is similar to the recess-shaped portion 73a shown in Figure 11(a). Specifically, the recessed portion 83a is formed perpendicular to the direction of the light path emitted by the light source. Specifically, the recess-shaped portion 83a is formed from the rear surface toward the front surface of the guide member 83. Specifically, the recess-shaped portion 83a is formed from the rear surface toward the front surface of the member. -light guide 83. The recess-shaped portion 83a comprises a pair of opposing surfaces formed in a linear symmetrical relationship to each other so that the two surfaces extend from a point (ie, deepest point of the recess ), gradually moving away from each other. As seen in plan, the respective edges of the two surfaces form a line that corresponds to a part of a line of an ellipse divided into a quarter, along its long and short axes.
[00091] With such recessed portions 73a and 83a as well, it is possible to obtain the predetermined advantageous benefits of the invention. The recessed portion 73a of a sharper arc shape is more preferable than the recessed portion 83a because it can more effectively scatter light from the light source.
[00092] While the vehicle lamp of the present invention has been described above as a position lamp of a passenger vehicle, the basic principles of the present invention are also applicable to any other interior or exterior lamps. Furthermore, the vehicle lamp of the present invention can be mounted on motorcycles. Specifically, the lamp of the present invention is not limited to the aforementioned constructions and applications as long as it is a lamp designed for use in vehicles. Industrial Application
[00093] The vehicle lamp of the present invention is suitable for application as a position lamp in passenger vehicles. List of Reference Signs

权利要求:
Claims (4)
[0001]
1. Vehicle lamp (30, 50, 60, 70, 80), including a light source (32), mounted on a vehicle body (11), and a light guide member (33, 53, 63, 73, 83) for guiding the light emitted by the light source (32), characterized in that the light-guiding member (33, 53, 63, 73, 83) has a row of a plurality of shaped portions. recess (33a to 33m, 53a, 63a, 73a, 83a) formed therein substantially perpendicular to a direction of the light path emitted by the light source (32); the recess-shaped portions (33a to 33m, 53a, 63a, 73a, 83a) are formed in such a way that as the distances from the light source (32) of individual portions of the recess-shaped portions recess (33a to 33m, 53a, 63a, 73a, 83a) increase, the pitches between the recess-shaped portions (33a to 33m, 53a, 63a, 73a, 83a) decrease, and the depths of the recess-shaped portions ( 33a to 33m, 53a, 63a, 73a, 83a) increase, and each of the recess-shaped portions (33a to 33m, 53a, 63a, 73a, 83a) is shaped so that two convex arcuate back surfaces are opposite each other. another, wherein the arcuate surface portions of each of the recess-shaped portions (33a to 33m, 53a, 63a, 73a, 83a) are formed spaced apart from each other with respective deeper portions (33a to 33f) of the portions of arcuate surface interconnected by a portion of a straight line, as seen in a section, and wherein, as seen in a section, a length of each surface portion ie arcuate of each of the recess-shaped portions (33a to 33m, 53a, 63a, 73a, 83a) along the direction of the light path is greater than that of the straight-line portion of a corresponding transverse recess-shaped portion .
[0002]
2. Vehicle lamp (30, 50, 60, 70, 80), according to claim 1, characterized in that each of the plurality of recess-shaped portions (33a to 33m, 53a, 63a, 73a, 83a) has an arcuate section of the same radius of curvature, and the depth of each of the recess-shaped portions (33a to 33m, 53a, 63a, 73a, 83a) is defined by a central angle (θ) of the arcuate section .
[0003]
3. Vehicle lamp (30, 50, 60, 70, 80) according to claim 1 or 2, characterized in that as seen in a section taken along an arranged direction of the plurality of portions in the form of recess, the portions between the recessed portions are each formed straight or substantially straight so that light does not leak out of the light-guiding member.
[0004]
4. Vehicle lamp (30, 50, 60, 70, 80), according to any one of claims 1 to 3, characterized in that the depths of the recess-shaped portions (33a to 33m, 53a, 63a, 73a, 83a) are set in a range of 0.01 μm to 25.00 μm, and the pitches between the recess-shaped portions (33a to 33m, 53a, 63a, 73a, 83a) are set equal to or greater than one lower limit value of 0.1 mm.

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同族专利:

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JP6081587B2|2017-02-15|

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WO2014192572A1|2014-12-04|

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法律状态:
2018-03-27| B15K| Others concerning applications: alteration of classification|Ipc: F21S 8/00 (2006.01), F21S 2/00 (2016.01), F21Y 101 |

2018-11-06| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

2020-07-28| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

2021-07-20| B350| Update of information on the portal [chapter 15.35 patent gazette]|

2021-11-16| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

2022-01-11| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 19/05/2014, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

申请号 | 申请日 | 专利标题

JP2013111903|2013-05-28|

JP2013-111903|2013-05-28|

PCT/JP2014/063186|WO2014192572A1|2013-05-28|2014-05-19|Vehicle lamp|

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