Disclosure of utility model
Based on the above description, the present utility model provides a shield case for a vehicle lamp driving module, which reduces occupied space of a circuit board while ensuring stable installation of the shield case.
The technical scheme for solving the technical problems is as follows:
A shield for a vehicle lamp driving module comprising a side wall and a top cover, the side wall being closed ring-shaped and defining together with the top cover a shield space having one end open;
A flanging antenna is outwards formed at one end of the side wall, which is far away from the top cover, and is in fit contact with a PCB (printed circuit board) provided with the shielding cover, and salient points in interference contact with the PCB are formed on the antenna;
the side wall is provided with a claw;
elastic ribs are formed on the top cover.
Compared with the prior art, the technical scheme of the application has the following beneficial technical effects:
The shielding cover provided by the application is fixed on the PCB board in a clamping interference fit mode, welding is not needed, positioning assembly holes are not needed to be formed on the PCB, the occupation of the PCB space is reduced on the premise of ensuring low cost, and the utilization rate of electronic components and wiring space is effectively improved.
On the basis of the technical scheme, the utility model can be improved as follows.
Furthermore, the number of the flanging antennae is multiple, and the grounding sizes of the flanging antennae and the PCB are designed to be different sizes.
Further, the top cover is provided with a first through hole corresponding to the elastic rib, the elastic rib is provided with 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.
Further, the free ends of the elastic ribs extend to a side away from the shielding space.
Further, one end of the claw is connected to the side wall, and the other end of the claw extends out from one side far away from the shielding space in an inclined mode by a preset angle.
Further, the side wall comprises a first side plate and a second side plate, the first side plate is connected to two sides of the top cover, the second side plate is connected to two ends of the top cover, the clamping jaws are formed at two ends of the first side plate, the first side plate is bent downwards to form two side straight walls, the second side plate is bent downwards to form two side straight walls, and the first side plate forms a part of the clamping jaws which is bent towards the two side straight walls and is close to the two side straight walls.
Further, a plurality of heat dissipation holes are formed in the top cover.
Further, the shielding case is made of electroplated tin steel plate, the plate thickness is 0.3mm, and the shielding case is formed by stamping.
The application also provides a car lamp driving module which comprises the shielding cover, an upper cover, a PCB (printed circuit board), a lower cover and a fastener, wherein the shielding cover is arranged on the upper cover;
The PCB is fixed on the lower cover through a fastener;
The shielding cover is covered on a region to be shielded of the PCB, and a copper laying region is arranged on the periphery of the region to be shielded corresponding to the flanging antenna and is used for forming grounding connection with the shielding cover;
The lower extreme of upper cover has the spacing groove that is limited by spacing arris, the shape of spacing groove with the shape looks adaptation of shield cover, the lateral wall of spacing arris with the jack catch butt, the top of spacing groove have with the supporting rib that the elastic rib corresponds.
Further, the upper cover is a plastic piece and made of PBT.
Detailed Description
In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. Embodiments of the application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that spatially relative terms, such as "under," "above," "over," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use and operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "under" or "beneath" other elements would then be oriented "on" the other elements or features. Thus, the exemplary terms "under" and "under" may include both an upper and a lower orientation. Furthermore, the device may also include an additional orientation (e.g., rotated 90 ° or other orientations) and the spatial descriptors used herein interpreted accordingly.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. In the following embodiments, "connected" is understood to mean "electrically connected", "communicatively connected", and the like, if the connected circuits, modules, units, and the like have electrical or data transferred therebetween.
As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof.
As shown in fig. 1, an embodiment of the present application discloses a lamp driving module including an upper cover 10, a shield can 20, a PCB board 30, a lower cover 40, and a fastener 50.
The structural design of the shielding case 20, as shown in fig. 2 and 3, is an innovation of the present application, and uses a completely different design concept compared with the prior art, so that the shielding case can be fixed on a PCB board.
The shielding cover 20 comprises a side wall 21 and a top cover 22, wherein the side wall 21 is in a closed ring shape and defines a shielding space with one open end together with the top cover 22.
The material of the shielding case 20 may be a metal material with better conductivity, in this embodiment, preferably an electroplated tin steel plate, the plate thickness of which is 0.3mm, and the structural components of which are formed by stamping, wherein the shape of the shielding case 20 is designed according to the area to be shielded on the PCB board 30, as in this embodiment, it is a cuboid box-shaped structure with a bottom end open.
The side wall 21 is kept away from the outside turn-ups feeler 211 that is formed with of one end of top cap 22, turn-ups feeler 211 and the laminating of the PCB board 30 of installing this shield cover 20 contact, turn-ups feeler 211 and PCB board 30 laminating contact effectively guarantee the electric current circulation of shield cover 20, for the contact of reinforcing turn-ups feeler 211 and PCB board 30, can design punching press bump 212 on the feeler, in this embodiment, punching press bump 212 has 0.2mm interference contact with PCB board 30.
Preferably, the number of the flange antenna 211 is plural, and the contact surfaces of the plurality of flange antennas 211 and the PCB 30 are designed to be different sizes.
Wherein, the side wall 21 is formed with a claw 213, and the top cover 22 is formed with an elastic rib 221.
In order to understand the principle of mounting and fixing the shielding case 20 of the present application, the structure of the shielding case needs to be matched 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 case 20, the side wall of the limiting rib 11 is formed with a retaining wall 111 abutting against the end of the claw 213, and the top of the limiting groove 10a has a supporting rib 12 corresponding to the elastic rib 221.
Namely, the shielding cover 20 is limited by the limiting groove 10a of the upper cover 10, the clamping claw 213 is matched with the retaining wall 111 to realize the position stabilization of the shielding cover 20 in the limiting groove 10a, and the shielding cover 20 is tightly pressed on the PCB 30 by the supporting rib 12.
Specifically, in this embodiment, the top cover 22 of the shielding case 20 has two elastic ribs 221, the two elastic ribs 221 are disposed in a diagonal direction of the top surface of the top cover, preferably, the top cover 22 is formed with a first through hole 22a corresponding to the elastic ribs 221, the elastic ribs 221 have a connection end 2211 and a free end 2212, the connection end 2211 is connected to an inner side of the first through hole 22a, and the free end 2212 is movably disposed in the first through hole 22a.
The elastic rib 221 may form interference contact with the support rib 12 of the upper cover 10, after the shielding cover 20 is installed in place, pressure is further generated on the shielding cover 20, so that the shielding cover 20 is more stable, preferably, the free end of the elastic rib 221 extends to a side far away from the shielding space, so that the support rib 12 of the upper cover 10 forms more stable pressure on the free end of the elastic rib 221, in this embodiment, the free end of the elastic rib 221 protrudes upwards by 0.2mm, so that interference contact of 0.2mm is formed between the elastic rib 221 and the support rib 12 of the upper cover 10.
As shown in fig. 4, one end of the claw 213 is connected to the side wall 21, the other end of the claw 213 extends to a side far away from the shielding space by a predetermined angle, in this embodiment, the claw 213 forms an included angle of 15 ° with an inner plane of the limiting rib 11 on two sides of the shielding cover 20, 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 0.3mm with the limiting rib 11, the end of the claw 213 is in cooperation with the retaining wall 111 to limit, after the shielding cover 20 is installed at the bottom of the upper cover 10, the claw 213 forms an inverted snap state with the upper cover 10, and the shielding cover 20 is limited in the upper cover 10.
The top cover 22 is formed with a plurality of heat dissipation holes 22b, which are beneficial to heat dissipation of components in the shielding space.
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 two sides of the top cover 22, the second side plate 2102 is connected to two ends of the top cover 22, the claw 213 is formed at two ends of the first side plate 2101, the first side plate 2101 is bent downward to form two side straight walls, the second side plate 2102 is bent downward to form two end straight walls, and a portion of the first side plate 2101 forming the claw 213 is bent toward the two end straight walls and is disposed close to the two end straight walls.
Wherein the PCB 30 is fixed to the lower cover 40 by a fastener 50, in the preferred embodiment of the present application, the fastener 50 is a screw.
As shown in fig. 6, the shielding case 20 is covered on a region a to be shielded of the PCB board 30, and a copper laying region B is provided on the periphery of the region to be shielded corresponding to the flange antenna 211, so as to form a grounding connection with the shielding case 20.
Preferably, the upper cover 10 is a PBT plastic member.
Preferably, as shown in fig. 5, in the area where the shielding case is installed, a plurality of first positioning ribs 13 are uniformly distributed on the upper cover 10, and the first positioning ribs 13 are respectively designed with an installation gap of 0.1mm with the top surface of the shielding case 20, so as to limit the vertical Z-direction movement of the shielding case, and the claw 213 and the retaining wall 111 cooperate to prevent the shielding case 20 from moving in the Z-direction negative direction. And meanwhile, the first positioning ribs 13 which are uniformly distributed can ensure the parallelism of the installation of the shielding cover 20 and ensure the Z-direction positioning of the shielding cover.
After the shielding cover 20 is installed in the upper cover 10, the elastic ribs 221 of the shielding cover 20 are pressed downwards by the supporting ribs 12 of the upper cover 10, and the shielding cover 20 cannot move in the negative Z direction due to the limitation of the clamping jaws 213, so that the elastic ribs 221 are elastically deformed and always pressed downwards by the upper cover, and the stable Z-direction positioning of the shielding cover is ensured.
The inner side of the limit groove 10a is also provided with a second positioning rib 14 for positioning the two ends in the X direction and a third positioning rib 15 for positioning the two sides in the Y direction, a positioning gap of 0.1mm is designed in the upper and lower profile direction of the second positioning rib 14 and the shielding cover 20, and a positioning gap of 0.1mm is designed in the left and right direction of the third positioning rib 15 and the shielding cover.
The vehicle lamp driving module provided by the embodiment of the application comprises the following assembly method:
1> the shield 20 is gently pushed into the limit groove 10a of the upper cover 10, and at this time, the shield 20 is fixed inside the upper cover 10 by the peripheral positioning and the claw.
2> Lightly put PCB 30 and upper cover 10, turn-ups feeler in the bottom of shield cover 20 contacts with copper-laying area of PCB at this moment, form the ground shield space, play electromagnetic shielding effect to the internal device and circuit of shield cover
3> Mounting the lower cover 40 on the PCB board 30 and screwing to complete the module assembly.
The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.