• 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:
    The invention relates to a printed circuit board (1), preferably for a circuit for operating a luminous means, with a retaining clip (2) arranged on a flat upper side (11) of the printed circuit board (1) and mechanically connected to the printed circuit board (1); and a throughbore (3) which is at least partially disposed below the retaining clip (2); wherein the throughbore (3) has at least one taper (31) and wherein a housing (5) for protecting the printed circuit board (1) by means of the retaining clip (2) and the taper (31) is mechanically fixable. The invention also relates to a system for a circuit for operating a luminous means and to a method for fixing a housing (5) to a printed circuit board (1).
    公开号:AT15258U1
    申请号:TGM397/2015U
    申请日:2015-12-22
    公开日:2017-04-15
    发明作者:
    申请人:Tridonic Gmbh & Co Kg；
    IPC主号:
    专利说明:

    description
    PCB FOR MECHANICAL FIXING OF A HOUSING
    The invention relates to a circuit board and a system of printed circuit board and housing, preferably for a circuit for operating a light source, such as a driver circuit, English ballast, or an electronic ballast, short electronic ballast. The invention relates in particular to optimizing a holding connection between the housing and the printed circuit board.
    Circuits for operating at least one light source, for example an LED or gas discharge lamp, are preferably arranged on a printed circuit board. To protect this circuit from external influences, such as dirt, mechanical destruction, moisture or electromagnetic radiation and to protect humans and the environment before the circuit, for example by touching live parts of the circuit or by the out-sent electromagnetic radiation of the circuit, the circuit board provided with a housing. The housing can accommodate additional elements in addition to the circuit board.
    If the housing is made, for example, of a metallic material, it is also necessary, for safety reasons, to ensure that a ground potential of a voltage supply is connected to the housing.
    Usually, a mechanical holding connection, in particular a clamping connection between the housing and printed circuit board is made possible by a holding element of the housing. This holding element is guided through a through hole of the printed circuit board and mechanically fixed by means of a retaining clip. In this case, the holding element of the housing has no or no sufficient physical contact with the inner wall of the through hole of the printed circuit board. In this way, under mechanical stress on the printed circuit board, for example during testing of the printed circuit board or during electrical contacting or during the installation of the circuit in the lighting system, the holding connection can be severely degraded.
    Conventionally, the housing can therefore be mechanically fixed only insufficiently on the circuit board. If the mechanical holding connection is unstable, sufficient protection of the printed circuit board against external influences or protection of the environment from the effects of the printed circuit board is not ensured.
    Moreover, due to the insufficient physical contact between the through hole and the holding member of the housing, a reduction in the holding force and the clamping force of the holding member is possible, resulting in an additional deterioration of the mechanical fixing. This deteriorated mechanical fixing can in particular lead to a deterioration of the ground potential connection between the housing and printed circuit board and especially lead to disruption or failure of the bulb during testing or commissioning of the circuit.
    It is therefore an object of the present invention to provide a printed circuit board available which can be reliably protected by means of a housing, wherein the mechanical holding connection of the housing is to be substantially improved on the circuit board. In particular, an electrical connection for applying a grounding potential between the housing and the circuit board should be made more reliable in order to improve the safety in handling the housing. It is important to ensure that the mass produced electronic circuit for a lamp does not have increased production costs and ease of manufacture is still guaranteed.
    This object is achieved with the technical features described in the independent claims. Preferred embodiments are described in the respective dependent claims.
    According to a first aspect of the invention is a printed circuit board, preferably for a
    Circuit for operating a light source, provided. The light-emitting means is preferably at least one LED. The printed circuit board has a retaining clip which is arranged on a flat upper side of the printed circuit board and is mechanically connected to the printed circuit board. Thus, a headband is provided which is fixedly arranged on the circuit board. The mechanical connection of the retaining clip is for example a releasable fixing, such as soldering, screws or clamps allows, or a permanent fixing, for example by gluing or riveting. The headband is thus adapted to hold a housing to the circuit board to provide protection to the circuit board.
    The circuit board also has a through hole, which is at least partially disposed below the retaining clip. The through hole is formed from the top of the circuit board to an opposite bottom of the circuit board.
    The perforation has according to the invention at least a constructive taper. This taper substantially restricts the freedom of movement of the retaining element of a housing within the throughbore. In particular, the taper ensures that the retaining element is in physical contact with the throughbore. For example, the taper is a protrusion or constriction within the throughbore. This taper partially reduces the inside diameter of the throughbore.
    E in the housing can be mechanically fixed to protect the circuit board by means of the retaining clip and the taper improved. Due to the lack of or very limited freedom of movement of the retaining element, the housing sits very tight on the circuit board and can not be solved in physical stress on the circuit board relative to the housing. The greatly minimized freedom of movement also ensures that the holding connection remains stable for a long period of time under normal use (testing, wiring, etc.) of the circuit, and thus no release of the housing from the circuit board is to be feared. In this way, a loose connection, such as shaking, of the housing due to the lack of mechanical fixation in the through hole is prevented. The taper ensures a tight fit of the housing or the retaining element of the housing within the through hole, whereby a later stressing of the circuit board, for example for testing the driver circuit or the wiring of the circuit at startup of the lighting system does not cause the case is different from the Circuit board dissolves and so may not be protected against electromagnetic radiation, moisture or dirt.
    This restriction of the freedom of movement of the housing by the taper already has an advantageous effect when applying the housing on the circuit board, since the range of movement of the housing is limited. Thus, it does not lead to a bending apart of the holding element of the housing when applying and thus not by relative displacement of the circuit board in the housing to a relaxation of this mechanical holding connection.
    In a preferred embodiment, the headband is electrically connected to a ground potential. Thus, the taper fulfills a dual function, since now the housing on the one hand mechanically fixed to the circuit board and also at the same time a reliable electrical connection between the housing and printed circuit board is made.
    Preferably, the housing for electronic ballasts made of metal, in order to ensure, for example, a mechanical and shielding against electromagnetic radiation. The grounding of the housing by means of the grounding potential has the goal to produce a defined reference potential or a potential equalization by which a faulty voltage occurring at the housing is to be short-circuited. According to standardized regulations in building technology, it is necessary that metallic housings be subjected to a grounding potential.
    By improving the mechanical holding connection and the electrical contact between the housing and printed circuit board is improved. A loose holding connection leads to a weak or partially broken electrical connection. The security and the functionality of such a circuit board are thus substantially increased. The formation of the retaining clip as a grounding line enables an efficient production of a circuit for operating the luminous means, since with a connection the double function is reliably produced. In particular, the design of the through hole with a taper ensures that the grounding always contacted with the housing - that is clamped - is so that even when testing the circuit on the circuit board or installing in the lighting system, a corresponding electrical and mechanical connection is ensured.
    In a preferred embodiment, the through hole in plan view of the circuit board is a slot, wherein the longitudinal sides of the slot at an angle greater than 0 degrees, preferably greater than 10 degrees, more preferably greater than 30 degrees below the retaining bracket.
    In plan view of the top of the circuit board, the through hole crosses the headband at an angle greater than 0 degrees. By increasing the angle between the longitudinal side and the headband, the holding force is increased, since the holding element is now aligned rather than transverse to the headband and the distance between the holding element and headband is reduced.
    E in slot is an elongated through hole. Its narrow transverse sides are preferably closed by semicircles whose diameters correspond to the width of the oblong hole. The longitudinal sides of the elongated hole preferably run parallel to one another. The use of a slot as a through hole ensures that a holding element is used with larger dimensions, which massive housing can be used or greater holding power is enabled.
    Now, if a holding element of the housing is used, which has for example two retaining tabs and a centrally extending slot, the retaining element can be arranged in the slot such that each retaining tab is clamped by the headband and the taper.
    In a preferred embodiment, the through hole in plan view of the circuit board is a slot, wherein at least two tapers are arranged on opposite longitudinal sides of the through hole. In this way, the housing is kept improved in the through hole, since now two opposite constrictions and the headband mechanically fix the housing within the through hole of the circuit board. The tapers are arranged, for example, near the semicircles of the longitudinal hole.
    In a preferred embodiment, the at least one taper is trapezoidal, wherein a tapered side of the taper runs parallel to a longitudinal side of the throughbore. A trapezoidal configuration of the taper is easy to produce and also allows a large overlapping area between the through hole and the holding element. In this way, a larger area of the holding element of the housing with the through hole is physically contacted, so that an increased mechanical fixation is obtained. In this way, the housing is arranged improved on the circuit board.
    In a further preferred embodiment, the headband is arranged by means of a solder joint on the circuit board. In this way, the headband is mechanically connected by a simplified production on the circuit board. Thus, the circuit board is equipped with the headband similar to all circuit elements of the circuit on the circuit board, whereby no additional manufacturing process is needed to connect the headband with the circuit board.
    In a preferred embodiment, circuit elements of a circuit for operating a lighting means are arranged on an underside of the printed circuit board opposite the upper side. In this way, the housing protects the circuit below the housing, wherein the housing is inserted through the circuit board and is fixed in the through hole.
    In an alternative embodiment, circuit elements of a circuit for operating a luminous means are arranged on the upper side of the printed circuit board. Thus, no two-sided assembly of the circuit board is necessary to produce on the one hand a mechanical holding connection and on the other hand, a reliable electrical connection between the housing and printed circuit board. By clamping the holding elements by means of taper and headband a one-sided loading of the circuit board is possible. Moreover, the headband then does not constitute an elevation on the top of the circuit board. Since the headband is now located on the side of the circuit elements and the height of the retaining bracket is less than the height of the circuit elements, miniaturization of the circuit is effected.
    In a preferred embodiment, the headband is arranged in the interior of the circuit board, ie in particular between the top of the circuit board and the opposite bottom. As a result, the headband is integrated into the circuit board and does not increase on the top or bottom of the circuit board. Thus, a miniaturization of the circuit board can be made possible.
    In a preferred embodiment, the bore is tapered by at least 10 percent, preferably 15 percent, more preferably 20 percent by means of the taper. These different degrees of taper enable a different degree of clamping. The greater the degree of taper, the greater the holding force of the holding connection between the housing and the printed circuit board.
    According to a further aspect of the invention, a system for a circuit for operating at least one light source consisting of a printed circuit board according to the previously described type and a housing is proposed. The housing serves to protect against external influences, such as moisture, dirt, etc. and the electromagnetic shielding of the arranged on the circuit board circuit.
    According to a preferred embodiment, the housing has at least one holding element, which is placed in the throughbore to mechanically fix the housing by means of the retaining clip and the taper to the circuit board. For example, four holes are provided at the corners or at the edge region of the circuit board in a rectangular printed circuit board, in which four retaining elements of the housing are placed according to the invention to produce the mechanical and possibly electrical connection between the housing and printed circuit board.
    Preferably, the holding element is a tear from the housing. An elevation is understood below as a holding element produced by means of a manufacturing method. In this example, parts of the housing are punched out and the inner portion of the punched is bent accordingly. This creates a holding element which is obtained from the same material of the housing and by simple material processing.
    Preferably, the retaining element has at least two retaining tabs, wherein the retaining tabs are preferably formed the same. Located midway between the tabs is a slot that has been made, for example, in a stamping or cutting process. If such a retaining element of the housing is then fixed in the throughbore, the retaining tabs are separated from the retaining clip. It creates a tension in the form that each retaining tab is clamped by means of a taper of the through hole and the headband.
    Preferably, the holding element is mechanically fixed to the first retaining tab on the headband and a first taper. In addition, the second retaining tab is mechanically fixed by means of the retaining clip and a second taper. In this way, a clamping of the retaining element takes place, wherein the headband extends through a slot between the retaining tabs. The taper is now provided so that each side of the retaining tab has direct physical contact with the interior of the bore. In this way, after the application of the housing on the circuit board, the holding element in the through hole no longer has freedom of movement and is clamped. Thus, the holding tabs of the retaining element during application can not be bent apart beyond a certain extent, so that even with physical force stress of the circuit board relative to the housing, the mechanical holding connection and thus inevitably does not solve an electrical connection.
    In a preferred embodiment, at least one tab of the holding element is mechanically fixed by the taper and the headband in the throughbore.
    In a preferred embodiment, the at least one retaining tab of the retaining element has a longitudinal side, wherein this longitudinal side of the retaining tab abuts at least 25 percent of the taper. In this way, the retaining tab over a majority of the through hole is physically fixed to the circuit board in contact and in particular mechanically fixed by the headband and the taper. In this way, a very stable holding connection and a reliable grounding line are obtained.
    In a further aspect of the invention, a method for fixing a housing to a circuit board is provided. The method comprises the method steps: arranging a retaining clip on an upper side of the printed circuit board above a throughbore, wherein the throughbore has at least one taper; Placing a retaining element of the housing in the interior of the throughbore, wherein the retaining element has at least two retaining tabs and a slot; and wherein the headband is passed through the slot, so that the retaining element is mechanically fixed by the headband and the taper.
    The invention or further embodiments and advantages of the invention will be explained in more detail with reference to figures, wherein the figures describe only embodiments of the invention. Identical components in the figures are given the same reference numerals. The figures are not to be considered as true to scale, it can be exaggerated large or exaggerated simplified individual elements of the figures.
    FIG. 1 shows a first embodiment of a system according to the invention; FIG. 2a shows a first embodiment of a circuit board according to the invention; 2b shows a second embodiment of a system according to the invention; 3a shows a third embodiment of a system according to the invention; 3b shows a fourth embodiment of a system according to the invention; FIG. 4 shows a fifth embodiment of a system according to the invention; FIG. 5 shows a second embodiment of a printed circuit board according to the invention.
    Fig. 1 shows a first embodiment of a system according to the invention. In this case, a circuit board 1 is shown as a flat plate in cross section. The printed circuit board 1 has a retaining clip 2. The headband 2 is mechanically connected to the printed circuit board 1 as an arcuate elevation above printed circuit board 1 with two soldering points 21. The headband 2 is thus mechanically detachable and fixed to the circuit board 1 connected. Instead of the soldering points 21, it is also possible to select spot welds, screw connections, adhesions or other mechanical fixings.
    The circuit board 1 also has a through hole 3, which is at least partially below the retaining clip 2. The through hole 3 is formed from a first upper side 11 of the printed circuit board 1 to a lower side 12 of the printed circuit board 1. The perforation 3 is designed in particular as a slot.
    1, a housing 5 is provided which has at least one retaining element 4. This holding element 4 is formed as a tear. A tear is a part of the housing 5, which is obtained in a punching and bending process. The retaining element 4 according to FIG. 1 has two retaining tabs 41, which are both identical and are separated centrally by a slot 42. The slot 42 can be obtained by punching or cutting.
    In order to mechanically fix the housing 5 to the circuit board 1, the holding element 4 is guided from the bottom 12 through the circuit board 1. At the located on the top 11 of the circuit board 1 headband 2, the retaining tabs 41 are widened, so that the slot 42 is at least temporarily expanded when applying the housing to the circuit board 1. The headband 2 is located after the application of the housing 5 in the region of the slot 42 of the holding element 4th
    In Fig. 1 is not shown that the through hole 3 has a taper 31. By means of this taper 31 and the retaining clip 2, the retaining element 4 is mechanically fixed in the throughbore 3 such that the retaining tabs 41 abut against the taper 31 and thus form a physical contact with the inner wall of the throughbore 3. In this way it is achieved that the holding element 4 is clamped between the taper 31 and the headband 2. The freedom of movement of the holding element 4 in the through hole 3 is thus substantially reduced or no longer present, so that in particular in mechanical stress of the circuit board 1 relative to the housing in the course of testing or commissioning a circuit on the circuit board 1 when installed in a lighting system, the holding connection can not be easily solved and is not inadvertently deteriorated, in particular does not lose its stability or becomes loose.
    In addition, it is provided that the headband 2 also has an electrical connection to a ground potential. In this way, the headband 2 is also a grounding line. A grounding line is useful, for example, if by means of the connection between the housing 5 and the circuit board 1 also an electrical connection must be created, for example, if the housing 5 consists of a metallic material. In this way, a grounding of the housing 5 and a simultaneous mechanical fixation on the circuit board 1 is obtained.
    In Fig. 2a is a plan view of an upper side 11 of a first embodiment of a printed circuit board 1 according to the invention is shown. Here, the plan view is shown. It can be seen that the perforation 3 in the form of a slot - here stylistically represented as a quadrangle - is formed. The longitudinal sides 32 orthogonal transverse sides may for example also be formed as semicircles. The slot 3 has two tapers 31 on opposite longitudinal sides 32. The longitudinal sides 32 of the through hole 3 are arranged at an angle α greater than 0 degrees relative to a longitudinal orientation of the retaining clip 2. By changing the angle α, the holding force of the mechanical fixation can be adjusted.
    The taper 31 tapers the through hole 3. Thus, a transverse dimension x of the through hole 3 in the height of the retaining clip 2 is greater than a transverse dimension y in the region of the taper 31. The taper 31 is formed for example as a trapezoidal projection. The trapezoidal configuration of the projections 31 makes it possible for a holding element 4 to be physically contacted with the inner walls of the throughbore 3 in a comparatively large area of the longitudinal side 32 of the throughbore 3. Thus, the mechanical fixation of the housing 5 is substantially improved on the circuit board 1.
    In Fig. 2b, a second embodiment of a system according to the invention is shown. In this case, the circuit board 1 described in Fig. 2a with a housing 5 and a holding element 4 of the housing 5 is shown. The holding element 4 is formed, for example, as shown in FIG. 1 and has two retaining tabs 41,41 ', which are placed in the interior of the through hole 3. A retaining clip 2 separates the retaining tabs 41,41 'in the region of the slot 42. Since the tapered side z of the taper 31 extends over a significant part of the longitudinal side of a tab 41, it is achieved that the retaining element 4 mechanically fixed on both sides of the slot 3 is and makes physical contact with the puncture. The retaining tabs 41,41 'are clamped by means of the taper 31 and the bracket 2. This leads to the fact that there is no bending apart of the retaining tabs 41 of the support member 4, since the freedom of movement of the retaining tabs 41 is massively limited within the through hole 3, so even when moving the circuit board 1 relative to the housing 5 no release of the housing 5 allow.
    The educated as grounding high holding elements 4 of the housing 5 are thus more clamped than without projections 31 and fix the housing 5 to the circuit board 1 permanently. In this way, a permanently reliable ground connection is achieved.
    In Fig. 3a, a third embodiment of a system according to the invention is shown. In this case, at least two retaining clips 2 at the corners of the printed circuit board 1 are arranged on an upper side 11 on the printed circuit board 1. The housing 5 has at least two holding elements 4, which are mechanically fixed to the headband 2 according to FIG. 1 or FIG. 2 b. In addition, it is shown in FIG. 3 that on a lower side 12 of the printed circuit board 1 circuit elements 6, 6 'are arranged, which can form a circuit for operating a lighting means. These circuit elements 6, 6 'are, for example, a rectifier, a clocked converter, a transformer, a battery as a secondary voltage supply, as well as input and output interfaces. In order to protect these circuit elements 6, 6 'from external influences, it is provided that the housing 5 is arranged mechanically fixed on the printed circuit board 1. The housing 5 is made of aluminum, for example, and must be grounded. For this purpose, the connection between the retaining element 4 and the retaining clip 2 is also an electrical contact with a ground potential.
    In Fig. 3b, a fourth embodiment of a system according to the invention is shown. In contrast to FIG. 3a, it is provided that the retaining clips 2 are formed on the same side as the circuit elements 6, 6 '. According to FIG. 3 b, this is the upper side 11 of the printed circuit board 1. The mechanical fixation by means of the retaining clip 2 and the taper 31 is not worse than according to FIG. 3 a, but now it is possible to dispense with a two-sided assembly of the printed circuit board 1. This simplifies the manufacturing effort and reduces the height of the system, since the height of the headband 2 is smaller than the height of the circuit elements 6, 6 '.
    4, a fifth embodiment of a system according to the invention is shown. In contrast to FIG. 1, the retaining clip 2 is arranged in the interior of the printed circuit board 1, that is to say between the upper side 11 and the lower side 12. This reduces the height of the system and improves the mechanical stability of the connection of the retaining clip 2 with the circuit board first
    In Fig. 5, a second embodiment of a circuit board 1 is shown in plan view. In contrast to Fig. 2a, the projections 31 are alternatively formed. According to the left projection 31 ', a semicircular bulge is provided in the interior of the through hole 3. In contrast, the right-hand projection 31 is triangular-shaped. The embodiment of a printed circuit board 1 shown in FIG. 5 makes it clear that the taper 31 only has to be configured such that it restricts or completely clamps the retaining element 4 or corresponding retaining tabs 41, 41 'in the through bore 3 in their movement radius.
    In the context of the invention, all described and / or drawn and / or claimed elements can be combined with each other as desired.
    REFERENCE LIST 1 Circuit board 11 Top 12 Bottom 2 Bracket, ground line 21 Solder point 3 Through hole, slot 31 Rejuvenation, projection 32 Long side 4 Retainer 41,41 'Retaining tab 42 Slot 5 Housing 6,6' Circuit elements x Transverse dimension below retainer y Transverse dimension at taper z tapered side of taper α angle between retaining bracket and through hole
    权利要求:
    Claims (10)
    [1]
    1. printed circuit board (1), preferably for a circuit for operating a light source, comprising: a headband (2) arranged on a flat top side (11) of the printed circuit board (1) and mechanically connected to the printed circuit board (1); and a throughbore (3) which is at least partially disposed below the retaining clip (2); wherein the throughbore (3) has at least one taper (31), wherein a housing (5) for protecting the printed circuit board (1) by means of the retaining clip (2) and the taper (31) is mechanically fixable.
    [2]
    2. Printed circuit board (1) according to claim 1, wherein the headband (2) is electrically connected to a ground potential.
    [3]
    3. Printed circuit board (1) according to any one of claims 1 or 2, wherein the through bore (3) in plan view of the printed circuit board (1) is a slot; and wherein the longitudinal sides (32) of the slot at an angle (a) greater than 0 degrees, preferably greater than 10 degrees, more preferably greater than 30 degrees below the retaining bracket (2).
    [4]
    4. printed circuit board (1) according to any one of the preceding claims, wherein the through bore (3) in plan view of the printed circuit board (1) is a slot; and wherein at least two tapers (31) are disposed on opposite longitudinal sides (32) of the throughbore (3).
    [5]
    5. printed circuit board (1) according to one of the preceding claims, wherein the at least one taper (31) is trapezoidal; and wherein a tapered side (z) of the taper (31) is parallel to a longitudinal side (32) of the throughbore (3).
    [6]
    6. printed circuit board (1) according to one of the preceding claims, wherein the headband (2) by means of soldered connection (21) on the circuit board (1) is arranged.
    [7]
    7. Printed circuit board (1) according to one of the preceding claims, wherein circuit elements (6, 6 ') of a circuit for operating a light source on one of the upper side (11) opposite underside (12) of the printed circuit board (1) are arranged.
    [8]
    8. printed circuit board (1) according to one of claims 1 to 6, wherein circuit elements (6, 6 ') of a circuit for operating a lighting means on the upper side (11) of the printed circuit board (1) are arranged.
    [9]
    9. System for a circuit for operating at least one lighting means consisting of a printed circuit board (1) according to one of claims 1 to 7; and a housing (5).
    [10]
    10. A method for mechanically fixing a housing (5) to a printed circuit board (1), comprising the following method steps: arranging a retaining clip (2) on an upper side (11) of the printed circuit board (1) above a through bore (3), wherein the through bore (3) has at least one taper (31); Placing a holding element (4) of the housing (5) inside the throughbore (3); wherein the holding element (4) has at least two retaining tabs (41) and a slot (42); and wherein the retaining clip (1) is guided through the slot (42), so that the retaining element (4) is mechanically fixed by the retaining clip (2) and the taper (31). For this 5 sheets of drawings
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
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