PCBA (Printed Circuit Board Assembly) connecting metal piece grounding structure

Abstract

The utility model discloses a PCBA connecting metal piece grounding structure, comprising a metal bottom shell, the top of the metal bottom shell is provided with an assembling groove, the top of the assembling groove is plugged with a PCBA board matched with the assembling groove, and the outer side of the metal bottom shell is provided with an annular frame integrally formed with the metal bottom shell. The utility model relates to the technical field of PCBA connecting metal piece grounding structures, through arranging the annular frame integrally formed with the metal bottom shell on the outer side of the metal bottom shell and connecting the plurality of groups of movable buckle assemblies on the outer side of the annular frame, when a PCBA board is connected with the metal bottom shell, an operator can conveniently press the PCBA board into an assembling groove, so that the PCBA board is connected with the metal bottom shell. Therefore, quick connection can be achieved, the overall structure is simple and free of bolts, and the risk of metal column dislocation caused by blind installation of the PCBA board is avoided; compared with a traditional grounding method, the requirement for the size precision of the metal piece is not high, the production process steps are reduced, and the bolt hitting procedure and station do not need to be increased.

Description

Technical Field

[0001] The utility model relates to the technical field of grounding structures of PCBA connection metal parts, and specifically relates to a grounding structure of PCBA connection metal parts. Background Art

[0002] The traditional method of grounding PCBA connection metal parts is to use bolts to fasten and ground the PCBA and the metal parts, or to add tin-plated through holes on the PCBA and columns with a diameter larger than the diameter of the tin-plated through holes on the PCBA on the metal parts, so that the metal columns and the tin-plated through holes on the PCBA are press-fitted and grounded.

[0003] Since each time the PCBA and the metal parts are assembled, bolts need to be added to fasten the PCBA to the metal parts for grounding, this assembly method has low efficiency, and the production process and workstations for fastening bolts need to be added; if the PCBA has been assembled with an opaque shell on one side, when assembling the metal shell on the other side, it is impossible to see whether the internal metal part columns are completely inserted into the tin-plated through holes on the PCBA; this assembly method has low efficiency, and the assembly of the metal shell during production is blind assembly, seriously affecting production efficiency and qualification rate. Content of the Utility Model

[0004] The utility model aims to provide a grounding structure of PCBA connection metal parts, which can avoid the risk of misalignment of metal columns caused by blind assembly of the PCBA board and improve the product qualification rate.

[0005] To achieve the above purposes, the utility model is realized through the following technical solutions: a grounding structure of PCBA connection metal parts, including a metal bottom shell, an assembly groove is opened at the top of the metal bottom shell, a PCBA board matching the assembly groove is inserted at the top of the assembly groove, and an annular frame integrally formed with the metal bottom shell is arranged on the outer side of the metal bottom shell;

[0006] Assembly grooves are opened at the outer side of the annular frame near the four corners, connection pieces are welded inside the assembly grooves, limit seats are welded at the tops of the connection pieces, guide blocks are welded on both sides of the limit seats, and a moving buckle assembly is arranged inside the guide blocks.

[0007] Preferably, the moving buckle assembly includes a clamping block, a guide groove is opened inside the guide block, both sides of the clamping block are slidably connected with the guide groove, a spring rod is connected to the rear side of the clamping block, and one end of the spring rod is connected to the limit seat.

[0008] More preferably, the clamping block is integrally T-shaped. The assembly effect of the PCBA board is improved.

[0009] More preferably, a tin coating is arranged at the bottom of the PCBA board.

[0010] Further preferably, a weight-reducing groove is formed at the top of the clamping block, which increases the overall structural strength of the clamping block.

[0011] Further preferably, the front end of the clamping block is arc-shaped, which reduces the friction between the clamping block and the outer edge of the PCBA board.

[0012] The utility model has the following beneficial effects: by arranging an annular frame integrally formed with the metal bottom shell on the outer side of the metal bottom shell and connecting a plurality of mobile buckle assemblies on the outer side of the annular frame, when connecting the PCBA board to the metal bottom shell, the operator can conveniently press the PCBA board into the assembly groove, so as to realize quick connection. The overall structure is simple without bolts, and there is no risk of misalignment of the metal posts caused by blind installation of the PCBA board; compared with the traditional grounding method, the size accuracy requirements of metal parts in this scheme are not high, the production process steps are reduced, and the processes and workstations of adding bolts are not required. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the main three-dimensional structural schematic diagram of the utility model.

[0014] Figure 2 It is the bottom three-dimensional structural schematic diagram of the utility model.

[0015] Figure 3 It is the partial enlarged structural schematic diagram of the utility model.

[0016] In the figure: <1>, metal bottom shell; <2>, assembly groove; <3>, PCBA board; <4>, annular frame; <5>, assembly slot; <6>, connecting piece; <7>, limit seat; <8>, guide block; <9>, clamping block; <10>, spring rod; <11>, tin coating. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] As Figures 1-3 shown, a PCBA connection metal part grounding structure includes a metal bottom shell <1>, an assembly groove <2> is formed at the top of the metal bottom shell <1>, a PCBA board <3> matching the assembly groove <2> is inserted at the top of the assembly groove <2>, and an annular frame <4> integrally formed with the metal bottom shell <1> is arranged on the outer side of the metal bottom shell <1>.

[0019] Assembly slots <5> are formed at the positions near the four corners on the outer side of the annular frame <4>, a connecting piece <6> is welded inside the assembly slot <5>, a limit seat <7> is welded at the top of the connecting piece <6>, guide blocks <8> are welded on both sides of the limit seat <7>, and a mobile buckle assembly is arranged inside the guide block <8>.

[0020] The movable buckle assembly includes a clamping block 9. A guide groove is formed inside the guide block 8, and both sides of the clamping block 9 are slidably connected to the guide groove. A spring rod 10 is connected to the rear side of the clamping block 9, and one end of the spring rod 10 is connected to the limit seat 7.

[0021] It should be noted that an annular frame 4 integrally formed with the metal bottom case 1 is provided on the outer side of the metal bottom case 1. At the same time, assembly grooves 5 with connecting pieces 6 welded inside are formed at the four-corner positions of the annular frame 4. When connecting the PCBA board 3 to the metal bottom case 1, the operator can press the PCBA board 3. At this time, the outer edge of the PCBA board 3 will push the clamping blocks 9 on both sides of the annular frame 4 away from each other, and cooperate with the limit seat 7 to compress the spring rod 10. After the PCBA board 3 is completely pressed into the assembly groove 2, the spring rod 10 will push the clamping block 9 to reset. A guide groove is formed inside the guide block 8, which is convenient for limiting the moving direction of the clamping block 9. After the clamping block 9 is reset, it will block the PCBA board 3, so that the PCBA board 3 will not fall off, and finally the connection between the PCBA board 3 and the metal bottom case 1 is completed.

[0022] A tin coating 11 is provided at the bottom of the PCBA board 3. The hardness of the tin coating 11 is relatively small. By using the height, hardness and conductivity of the tin coating 11, when assembling the PCBA board 3, a downward pressure is applied to the PCBA board 3, so that the PCBA board 3 is assembled on the upper side of the metal bottom case 1. At this time, the tin coating 11 contacts the metal bottom case 1 and deforms, which can make the PCBA and the metal part conduct electricity and be grounded.

[0023] The clamping block 9 is integrally designed as a T shape, which can increase the contact area between the bottom of the clamping block 9 and the upper side of the PCBA board 3, and further increase the assembly stability of the PCBA board 3.

[0024] A weight-reducing groove is formed at the top of the clamping block 9, which can reduce the overall mass of the clamping block 9 while increasing the overall structural strength of the clamping block 9, thereby increasing the assembly quality of the PCBA board 3.

[0025] The front end of the clamping block 9 is set as an arc shape, which reduces the friction between the clamping block 9 and the outer edge of the PCBA board 3, thereby increasing the convenience of assembling the PCBA board 3.

[0026] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A grounding structure for a PCBA connection metal part, including a metal bottom case (1), characterized in that, An assembly groove (2) is provided at the top of the metal bottom case (1), and a PCBA board (3) matching the assembly groove (2) is inserted into the top of the assembly groove (2). An annular frame (4) integrally formed with the metal bottom case (1) is provided on the outer side of the metal bottom case (1). Assembly grooves (5) are provided at the outer side of the annular frame (4) near the four corners. A connecting piece (6) is welded inside the assembly groove (5). A limiting seat (7) is welded to the top of the connecting piece (6). Guide blocks (8) are welded to both sides of the limiting seat (7). A moving buckle assembly is provided inside the guide blocks (8).

2. The grounding structure of the PCBA connection metal part according to claim 1, characterized in that, The moving buckle assembly includes a clamping block (9). A guide groove is provided inside the guide block (8). Both sides of the clamping block (9) are slidably connected to the guide groove. A spring rod (10) is connected to the rear side of the clamping block (9). One end of the spring rod (10) is connected to the limiting seat (7).

3. A grounding structure for a PCBA connecting metal part according to claim 2, characterized in that, The clamping block (9) is integrally T-shaped.

4. A grounding structure of a PCBA connecting metal part according to claim 1, characterized in that, A tin coating (11) is provided at the bottom of the PCBA board (3).

5. The grounding structure of the PCBA connection metal part according to claim 2, wherein A weight-reducing groove is provided at the top of the clamping block (9).

6. The grounding structure of the PCBA connection metal part according to claim 2, characterized in that, The front end of the clamping block (9) is arc-shaped.

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