Shielding cover for vehicle lamp driving module and vehicle lamp driving module

Abstract

The utility model relates to a shielding case for a car lamp driving module, which comprises a side wall and a top cover, the side wall is in a closed ring shape, and the side wall and the top cover jointly define a shielding space with an open end; one end, far away from the top cover, of the side wall outwards forms a flanging antenna, the flanging antenna is in fit contact with a PCB (Printed Circuit Board) provided with the shielding case, and a salient point in interference contact with the PCB is formed on the antenna; clamping jaws are formed on the side walls; the elastic ribs are formed on the top cover, welding does not need to be adopted, positioning assembly holes do not need to be formed in the PCB, on the premise that low cost is guaranteed, occupied space of the PCB is reduced, and the utilization rate of electronic components and wiring space is effectively increased.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive parts structure design, and particularly relates to a shielding cover for a headlight driving module and a headlight driving module. Background Art

[0002] With the development of automotive intelligence and networking, the number of modules on vehicles has increased, and the electronic devices and circuits on the internal circuit board of the headlight driving module have become increasingly complex. To avoid the influence of external electromagnetic waves on the internal circuit of the module and the radiation of the electromagnetic waves generated inside, a metal shell is required to integrally cover the key devices. The common practice is to use a metal shielding cover inside the module to shield electronic signals.

[0003] In the prior art, the metal shells of the shielding covers are directly welded to the PCB or positioned and assembled on the PCB board. Welding to the PCB is costly; for the solution of welding to the PCB, the cost is high, the welding process needs to be added, and the welding process may affect the welding process of the surrounding electronic devices during welding, increasing the product rejection rate; for the solution of positioning and assembling on the PCB, positioning and assembling holes need to be made on the PCB, resulting in a large area of prohibited device areas and wiring areas on the PCB. Summary of the Utility Model

[0004] Based on the above description, the utility model provides a shielding cover for a headlight driving module, which reduces the space occupied on the circuit board while ensuring stable installation.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A shielding cover for a headlight driving module, which includes a side wall and a top cover. The side wall is a closed ring and jointly defines a shielding space with one end open with the top cover;

[0007] One end of the side wall away from the top cover is formed with a flanging antenna, the flanging antenna is in contact with the PCB board on which the shielding cover is installed, and convex points for interference fit with the PCB board are formed on the antenna;

[0008] Claw fingers are formed on the side wall;

[0009] Elastic ribs are formed on the top cover.

[0010] Compared with the prior art, the technical solution of the present application has the following beneficial technical effects:

[0011] The shielding cover provided by this application is fixed on the PCB board by means of a snap-fit interference fit. There is no need for welding or positioning and assembly holes on the PCB. On the premise of ensuring low cost, it reduces the occupation of PCB space and effectively improves the utilization rate of electronic component and wiring space.

[0012] Based on the above technical solution, the present utility model can also be improved as follows.

[0013] Further, the number of the flanging antennae is multiple, and the installation of the multiple flanging antennae on the grounding of the PCB board is designed with different sizes.

[0014] Further, the top cover is provided with a first through hole corresponding to the elastic rib. The elastic rib has a connecting end and a free end. The connecting end is connected to the side wall of the first through hole, and the free end is movably arranged in the first through hole.

[0015] Further, the free end of the elastic rib extends to the side away from the shielding space.

[0016] Further, one end of the claw is connected to the side wall, and the other end extends out at a predetermined angle inclined to the side away from the shielding space.

[0017] Further, the side wall includes a first side plate and a second side plate. The first side plate is connected to both sides of the top cover, and the second side plate is connected to both ends of the top cover. The claws are formed at both ends of the first side plate. The first side plate is bent downward to form two straight side walls, and the second side plate is bent downward to form two straight end walls. The part of the first side plate forming the claws is bent towards the two straight end walls and is arranged close to the two straight end walls.

[0018] Further, a plurality of heat dissipation holes are formed on the top cover.

[0019] Further, the material of the shielding cover is electroplated tin steel sheet with a thickness of 0.3 mm, which is formed by stamping.

[0020] This application also provides a headlight driving module, which includes the above-mentioned shielding cover, and also includes an upper cover, a PCB board, a lower cover and a fastener;

[0021] The PCB board is fixed to the lower cover by a fastener;

[0022] The shielding cover covers the area to be shielded on the PCB board. The outer periphery of the area to be shielded corresponds to the flanging antennae and has a copper plating area for forming a ground connection with the shielding cover;

[0023] The lower end of the upper cover has a limiting groove defined by a limiting edge. The shape of the limiting groove is adapted to the shape of the shielding cover. The side wall of the limiting edge abuts against the clamping claw, and the top of the limiting groove has a supporting rib corresponding to the elastic rib.

[0024] Further, the upper cover is a plastic part, and the material is PBT. Description of the Drawings

[0025] Figure 1 It is an exploded structural schematic diagram of a vehicle lamp drive module provided by an embodiment of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the shielding cover in an embodiment of the present application;

[0027] Figure 3 It is a top view structural schematic diagram of the shielding cover in an embodiment of the present application;

[0028] Figure 4 It is a cross-sectional schematic diagram of a vehicle lamp drive module in an embodiment of the present application;

[0029] Figure 5 It is a structural schematic diagram of the upper cover in an embodiment of the present application;

[0030] Figure 6 It is a structural schematic diagram of the PCB board in an embodiment of the present application. Detailed Embodiments

[0031] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present application is more thorough and comprehensive.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the specification of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0033] It will be understood that spatial relationship terms such as "under", "below", "beneath", "underneath", "above", "over" etc. may be used herein to describe the relationship of one element or feature shown in the figures to other elements or features. It should be understood that, in addition to the orientation shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the drawings is flipped, an element or feature described as "under other elements" or "beneath them" or "under it" will be oriented "above" the other elements or features. Thus, the exemplary terms "under" and "beneath" can include both the upper and lower orientations. In addition, the device may also have other orientations (such as being rotated 90° or other orientations), and the spatial descriptors used herein are to be interpreted accordingly.

[0034] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element or connected to the other element through an intermediate element. In the following embodiments, "connection", if there is a transfer of electrical signals or data between the connected circuits, modules, units, etc., should be understood as "electrically connected", "communicatively connected", etc.

[0035] As used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprises / include" or "has" etc. specify the presence of the stated features, wholes, steps, operations, components, parts or combinations thereof, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0036] As Figure 1 shown, an embodiment of the present application discloses a headlight driving module, which includes an upper cover 10, a shielding cover 20, a PCB board 30, a lower cover 40 and a fastener 50.

[0037] Among them, as Figure 2 and Figure 3 shown, the structural design of the shielding cover 20 is a major innovation of the present application. It adopts a completely different design concept compared with the prior art, so that it can be fixed on the PCB board.

[0038] Among them, the shielding cover 20 includes a side wall 21 and a top cover 22. The side wall 21 is a closed ring and jointly defines a shielding space with one end open with the top cover 22.

[0039] The material of the shielding cover 20 can be a metal material with better electrical conductivity. In this embodiment, it is preferably electroplated tin steel sheet with a thickness of 0.3 mm. Its structural components are formed by stamping. The shape of the shielding cover 20 is designed according to the area to be shielded on the PCB board 30. For example, in this embodiment, it is a rectangular box-shaped structure with an open bottom end.

[0040] One end of the side wall 21 away from the top cover 22 is formed with a flanging antenna 211 outward. The flanging antenna 211 is in contact with the PCB board 30 on which the shielding cover 20 is installed. The contact between the flanging antenna 211 and the PCB board 30 effectively ensures the current flow of the shielding cover 20. To enhance the contact between the flanging antenna 211 and the PCB board 30, stamping bumps 212 can be designed on the antenna. In this embodiment, the stamping bumps 212 have an interference contact of 0.2 mm with the PCB board 30.

[0041] Preferably, the number of the flanging antennas 211 is multiple, and the contact surface sizes of the multiple flanging antennas 211 with the PCB board 30 are designed to be of different sizes.

[0042] Wherein, a clamping claw 213 is formed on the side wall 21, and an elastic rib 221 is formed on the top cover 22.

[0043] To understand the principle of the installation and fixation of the shielding cover 20 of the present application, its structure needs to be understood in cooperation with the structure of the upper cover 10. Specifically, the lower end of the upper cover 10 has a limiting groove 10a defined by a limiting rib 11. The shape of the limiting groove 10a is adapted to the shape of the shielding cover 20. A retaining wall 111 for abutting against the end of the clamping claw 213 is formed on the side wall of the limiting rib 11, and a supporting rib 12 corresponding to the elastic rib 221 is provided at the top of the limiting groove 10a.

[0044] That is, the shielding cover 20 is limited by the limiting groove 10a of the upper cover 10, and the clamping claw 213 and the retaining wall 111 cooperate to be clamped to realize the stable position of the shielding cover 20 in the limiting groove 10a, and the shielding cover 20 is pressed tightly on the PCB board 30 by the supporting rib 12.

[0045] Specifically, in this embodiment, there are two elastic ribs 221 on the top cover 22 of the shielding cover 20. The two elastic ribs 221 are arranged in the diagonal direction of its top surface. Preferably, the top cover 22 is formed with a first through hole 22a corresponding to the elastic rib 221. The elastic rib 221 has a connecting end 2211 and a free end 2212. The connecting end 2211 is connected to the inside of the first through hole 22a, and the free end 2212 is movably arranged in the first through hole 22a.

[0046] The elastic rib 221 can form an interference contact with the support rib 12 of the upper cover 10. After the shielding cover 20 is installed in place, it further generates pressure on the shielding cover 20 to make the shielding cover 20 more stable. Preferably, the free end of the elastic rib 221 extends toward the side away from the shielding space, so as to ensure that the support rib 12 of the upper cover 10 forms a more stable pressure on the free end of the elastic rib 221. In this embodiment, the free end of the elastic rib 221 protrudes upward by 0.2 mm, so that an interference contact of 0.2 mm is formed between the elastic rib 221 and the support rib 12 of the upper cover 10.

[0047] Among them, in combination Figure 4 As shown, one end of the claw 213 is connected to the side wall 21, and the other end extends obliquely by a predetermined angle toward the side away from the shielding space. In this embodiment, there are two claws 213 on each of the left and right sides of the shielding cover 20. Among them, the claw 213 forms a 15° angle with the inner plane of the limiting rib 11. When the shielding cover 20 is installed inside the upper cover 10, the claw 213 is compressed and deformed by an external force to form an interference fit of 0.3 mm between it and the limiting rib 11. The end of the claw 213 is matched and limited with the retaining wall 111. After the shielding cover 20 is installed at the bottom of the upper cover 10, the claw 213 forms a reverse buckle and locking state with the upper cover 10, and the shielding cover 20 is limited within the upper cover 10.

[0048] A plurality of heat dissipation holes 22b are formed on the top cover 22, which is conducive to the heat dissipation of the components inside the shielding space.

[0049] In the embodiment of the present application, the side wall 21 is an integrally formed structure. Specifically, the side wall 21 includes a first side plate 2101 and a second side plate 2102. The first side plate 2101 is connected to both sides of the top cover 22, and the second side plate 2102 is connected to both ends of the top cover 22. The claw 213 is formed at both ends of the first side plate 2101. The first side plate 2101 is bent downward to form two straight side walls, and the second side plate 2102 is bent downward to form two straight end walls. The part of the first side plate 2101 where the claw 213 is formed is bent toward the two end straight walls and is arranged close to the two end straight walls.

[0050] Among them, the PCB board 30 is fixed to the lower cover 40 through a fastener 50. In a preferred embodiment of the present application, the fastener 50 is a screw.

[0051] Such as Figure 6 As shown, the shielding cover 20 covers the area A to be shielded of the PCB board 30, and a copper plating area B corresponding to the flanging antenna 211 is provided on the outer periphery of the area to be shielded for forming a grounding connection with the shielding cover 20.

[0052] Preferably, the upper cover 10 is a PBT plastic part.

[0053] Preferably, as Figure 5 shown, in the area where the shielding cover is installed, a plurality of first positioning ribs 13 are evenly distributed on the upper cover 10. The first positioning ribs 13 are respectively designed with an installation gap of 0.1 mm from the top surface of the shielding cover 20 to limit the upward movement of the shielding cover in the vertical Z direction. The claw 213 and the retaining wall 111 cooperate to prevent the shielding cover 20 from moving in the negative Z direction. At the same time, the evenly distributed first positioning ribs 13 can ensure the parallelism of the installation of the shielding cover 20 and ensure the Z-direction positioning of the shielding cover.

[0054] After the shielding cover 20 is installed into the upper cover 10, the elastic rib 221 of the shielding cover 20 is subjected to the downward pressure of the support rib 12 of the upper cover 10. Due to the restriction of the claw 213 on the shielding cover 20, it cannot move in the negative Z direction, and the elastic rib 221 undergoes elastic deformation and will always be subjected to the downward pressure of the upper cover; to ensure the stable Z-direction positioning of the shielding cover.

[0055] On the inner side of the limit groove 10a, a second positioning rib 14 for X-direction positioning at both ends and a third positioning rib 15 for Y-direction positioning on both sides are further formed. The second positioning rib 14 and the upper and lower contour directions of the shielding cover 20 are designed with a positioning gap of 0.1 mm, and the third positioning rib 15 and the shielding cover are designed with a positioning gap of 0.1 mm in the left and right directions.

[0056] The headlight drive module provided by the embodiment of the present application has the following assembly method:

[0057] 1> Gently push the shielding cover 20 into the limit groove 10a of the upper cover 10. At this time, the shielding cover 20 is fixed inside the upper cover 10 through peripheral positioning and claws.

[0058] 2> Gently place the PCB board 30 on the upper cover 10. At this time, the flanging antenna at the bottom of the shielding cover 20 contacts the copper-clad area of the PCB board, forming a grounded shielding space, which has an electromagnetic shielding effect on the devices and circuits inside the shielding cover.

[0059] 3> Install the lower cover 40 on the PCB board 30 and tighten the screws to complete the module assembly.

[0060] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A shielding cover for a vehicle light driving module, characterized in that: It comprises a side wall and a top cover, wherein the side wall is a closed ring and defines a shielding space with one end open together with the top cover; The side wall is formed with a flanged feeler at one end away from the top cover, the flanged feeler is in close contact with the PCB board on which the shielding cover is installed, and a convex point is formed on the feeler for interference contact with the PCB board; A claw is formed on the side wall; Elastic ribs are formed on the top cover.

2. The shielding cover for a vehicle light driving module according to claim 1, characterized in that: There are multiple flanged feelers, and the contact surfaces between the multiple flanged feelers and the PCB board are designed to be of different sizes.

3. The shielding cover for a vehicle light driving module according to claim 1, characterized in that: The top cover is formed with a first through hole corresponding to the elastic rib, and the elastic rib has a connecting end and a free end, the connecting end is connected to the side wall of the first through hole, and the free end is movably disposed in the first through hole.

4. The shielding cover for a vehicle light driving module according to claim 3, characterized in that: The free end of the elastic rib extends toward a side away from the shielding space.

5. The shielding cover for a vehicle light driving module according to claim 1, characterized in that: One end of the claw is connected to the side wall, and the other end thereof is extended outwardly at a predetermined angle to a side away from the shielding space.

6. The shielding cover for a vehicle light driving module according to claim 5, characterized in that: The side wall includes a first side panel and a second side panel, the first side panel is connected to both sides of the top cover, the second side panel is connected to both ends of the top cover, the claws are formed at both ends of the first side panel, the first side panel is bent downward to form straight walls on both sides, the second side panel is bent downward to form straight walls at both ends, and the part of the first side panel forming the claws is bent toward the straight walls at both ends and arranged close to the straight walls at both ends.

7. The shielding cover for a vehicle light driving module according to claim 1, characterized in that: A plurality of heat dissipation holes are formed on the top cover.

8. The shielding cover for a vehicle light driving module according to any one of claims 1 to 7, characterized in that: The shielding cover is made of tin-plated steel plate with a thickness of 0.3 mm, which is formed by stamping.

9. A vehicle light driving module, characterized in that: The shielding cover comprises the shielding cover as claimed in any one of claims 1 to 7, and further comprises an upper cover, a PCB board, a lower cover and a fastener; The PCB board is fixed to the lower cover by fasteners; The shielding cover is arranged on the shielding area of ​​the PCB board, and the outer periphery of the shielding area corresponds to the flanged feeler and has a copper-plated area for forming a grounding connection with the shielding cover; The lower end of the upper cover has a limiting groove defined by a limiting edge, the shape of the limiting groove is adapted to the shape of the shielding cover, the side wall of the limiting edge is formed with a retaining wall abutting against the claw, and the top of the limiting groove has a supporting rib corresponding to the elastic rib.

10. The vehicle light driving module according to claim 9, characterized in that: The upper cover is a plastic part, and the material is PBT.

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