PCBA fixing device

Abstract

The utility model discloses a fixing device of a PCBA, and relates to the technical field of circuit board installation. The fixing device of the PCBA comprises a shell, the shell is provided with an installation space, and the installation space is provided with an opening end; the PCBA is positioned in the mounting space; the end cover covers the opening end; wherein the shell and / or the end cover are / is provided with a plurality of extrusion blocks, the plurality of extrusion blocks are distributed at intervals, and the plurality of extrusion blocks are in interference extrusion fit with the PCBA. According to the utility model, the PCBA can be reliably fixed in the installation space, and bolts are not needed for fastening, so that the disassembly and assembly operation of the PCBA can be simplified, and the disassembly and assembly efficiency of the PCBA can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board installation, in particular to a fixing device for a PCBA. Background Art

[0002] In a battery management system, a housing is usually used to install and fix the circuit board in the battery management system. In the related art, multiple bolt holes are usually set on the housing and the circuit board respectively, and the circuit board and the housing are screwed and fixed by bolts inserted into the bolt holes. In the above-mentioned circuit board fixing scheme, during the assembly process, multiple bolts usually need to be installed in sequence, resulting in a cumbersome disassembly and assembly process. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art to at least a certain extent. To this end, the utility model provides a fixing device for a PCBA, which can reliably fix the PCBA in an installation space without the need for bolts to be fastened, thereby simplifying the disassembly and assembly operation of the PCBA and improving the disassembly and assembly efficiency of the PCBA.

[0004] The PCBA fixing device provided by the utility model comprises: a shell, the shell having an installation space, and the installation space having an open end; a PCBA, the PCBA being located in the installation space; and an end cover, the end cover being arranged on the open end; wherein the shell and / or the end cover are provided with a plurality of extrusion blocks, the plurality of extrusion blocks are distributed at intervals, and the plurality of extrusion blocks are extrusion-fitted with the PCBA by interference.

[0005] In some embodiments, among the multiple extrusion blocks, at least one extrusion block is located on the upper side of the PCBA, at least one extrusion block is located on the lower side of the PCBA, and the extrusion blocks located on the upper side of the PCBA and the extrusion blocks located on the lower side of the PCBA are respectively arranged correspondingly; wherein the up and down directions are parallel to the thickness direction of the PCBA.

[0006] In some embodiments, there is a distance d1 between the extrusion block located on the upper side of the PCBA and the corresponding extrusion block located on the lower side of the PCBA, the thickness of the part of the PCBA that cooperates with the extrusion block is d2, and the fixing device satisfies: 0.1mm≤d2-d1≤0.2mm.

[0007] In some embodiments, the PCBA has a first edge and a second edge that are oppositely disposed; wherein the second edge is disposed toward the open end.

[0008] In some embodiments, portions of the PCBA close to the first edge and the second edge are respectively extruded and fit with the extrusion block by interference; wherein the extrusion block close to the first edge of the PCBA is connected to the housing; and the extrusion block close to the second edge of the PCBA is connected to the end cover.

[0009] In some embodiments, a portion of the PCBA close to the second edge is provided with a mounting hole; the end cover is provided with a buckle, and the buckle is engaged with the mounting hole.

[0010] In some embodiments, the mounting hole includes a first through hole and a second through hole, the axial directions of the first through hole and the second through hole are parallel to the thickness direction of the PCBA; the first through hole is located on the side of the second through hole facing the second edge, the aperture of the first through hole is larger than the aperture of the second through hole, the first through hole and the second through hole are connected, and a limiting protrusion is formed at the connection between the first through hole and the second through hole; the buckle is used to move from the first through hole to the second through hole under the action of external force, and the limiting protrusion is used to limit the buckle from moving from the second through hole to the first through hole after the external force is removed.

[0011] In some embodiments, the clip includes a clamping column extending along the thickness direction of the PCBA, one end of the clamping column is connected to the end cover through a connecting portion, the other end of the clamping column can extend from the mounting hole, and the portion of the clamping column extending from the mounting hole forms a limiting portion, and the maximum dimension of the limiting portion along the radial direction of the second through hole is greater than the diameter of the second through hole.

[0012] In some embodiments, the PCBA further has a third edge and a fourth edge arranged opposite to each other, and the third edge and the fourth edge are both located between the first edge and the second edge; two opposite side walls of the shell are provided with slide grooves, and the slide grooves are connected to the installation space, and the two slide grooves are respectively matched with parts of the PCBA close to the third edge and the second edge, and the slide grooves are used to guide the PCBA to move from the opening end to the installation space.

[0013] In some embodiments, a portion of the slide groove away from the open end can be press-fitted with the PCBA by interference.

[0014] The fixing device of PCBA provided by the embodiment of the utility model is provided with a shell, a PCBA and an end cover, wherein the shell has an installation space, and the installation space has an open end, the PCBA is located in the installation space, and the end cover is provided at the open end, and the shell and / or the end cover are provided with a plurality of extrusion blocks, the plurality of extrusion blocks are distributed at intervals, and the plurality of extrusion blocks are interference fit with the PCBA. In this way, the PCBA can be reliably fixed in the installation space through the interference fit between the PCBA and the extrusion blocks in the installation space, so that bolts are no longer needed for fastening, which facilitates the simplification of the disassembly and assembly of the PCBA and improves the disassembly and assembly efficiency of the PCBA.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a structural schematic diagram of a PCBA fixing device provided by an exemplary embodiment;

[0017] Figure 2 This is a structural schematic diagram of a PCBA fixture provided by an exemplary embodiment when a part of the structure is hidden and displayed;

[0018] Figure 3 This is a schematic diagram of the cooperation between a PCBA, an extrusion block, and a buckle provided by an exemplary embodiment;

[0019] Figure 4 is a schematic structural diagram of an end cap provided by an exemplary embodiment;

[0020] Figure 5 It is a schematic structural diagram of two extrusion blocks corresponding to each other along the thickness direction of the PCBA provided by an exemplary embodiment;

[0021] Figure 6 is a schematic diagram of the structure of a PCBA provided by an exemplary embodiment;

[0022] Figure 7 is a schematic diagram of a partial structure of a buckle provided by an exemplary embodiment;

[0023] Figure 8 is a schematic diagram of the cooperation between a PCBA and an end cover provided by an exemplary embodiment;

[0024] Fig. 9 This is a schematic diagram of the structure of a housing provided by an exemplary embodiment. Figure 1 ;

[0025] Fig.10 This is a schematic diagram of the structure of a housing provided by an exemplary embodiment. Figure 2;

[0026] Fig.11 It is a schematic diagram of the cooperation between the PCBA and the housing provided by an exemplary embodiment;

[0027] Fig.12a , Figure 12b and Fig.12c The figure is a schematic diagram of an assembly process of a PCBA fixture provided by an embodiment.

[0028] Description of reference numerals:

[0029] 1-housing; 11-first shell; 12-second shell; 13-extrusion block; 14-slide groove; 1a-installation space; 1b-open end; 2-PCBA; 2a-first edge; 2b-second edge; 21-installation hole; 211-first through hole; 212-second through hole; 213-limiting protrusion; 3-end cover; 31-cover body; 32-folded edge; 33-buckle; 331-clamping column; 332-limiting part. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0031] The structure, function and implementation process of the PCBA fixing device of the embodiment of the utility model are described below with reference to the accompanying drawings for illustration.

[0032] Among them, PCBA (Printed Circuit Board Assembly) is a circuit board obtained by printing solder paste on a PCB (Printed circuit board), and then installing various components such as resistors, integrated circuits, capacitors and transformers on the PCB according to application scenario requirements.

[0033] In addition, other structures and functions of the fixing device of the PCBA in the embodiment of the utility model are known to those skilled in the art, and are not described here in detail to reduce redundancy.

[0034] Figure 1 is a structural schematic diagram of a PCBA fixing device provided by an exemplary embodiment; Figure 2 This is a structural schematic diagram of a PCBA fixture provided by an exemplary embodiment when a part of the structure is hidden and displayed; Figure 3 This is a schematic diagram of the cooperation between a PCBA, an extrusion block, and a buckle provided by an exemplary embodiment; Figure 4It is a schematic structural diagram of an end cover provided by an exemplary embodiment.

[0035] Please refer to Figures 1 to 4 The PCBA fixing device provided in this embodiment includes: a housing 1, a PCBA 2 and an end cover 3. An installation space 1a is formed in the housing 1, and the installation space 1a has an open end 1b. The end cover 3 is arranged at the open end 1b, so that the end cover 3 and the housing 1 can enclose a relatively closed installation space 1a, and the PCBA 2 is located in the installation space 1a.

[0036] For ease of description, the following description will be made with the thickness direction Z of the PCBA 2 as the height direction, i.e., the up-down direction. The housing 1 and / or the end cover 3 are provided with a plurality of extrusion blocks 13, the plurality of extrusion blocks 13 are distributed at intervals, and each extrusion block 13 is extended in the up-down direction, so that each extrusion block 13 can be extruded and fit with the PCBA 2 by interference.

[0037] The interference fit means that the extrusion block 13 is in extrusion contact with the PCBA 2 and the interference generated by the contact between the two is within a preset interference range.

[0038] In some examples, the upper side and the lower side of PCBA 2 can cooperate with a plurality of extrusion blocks 13 respectively, and the extrusion blocks 13 located on the upper side of PCBA 2 can be pressed by interference with the upper surface of PCBA 2, and the extrusion blocks 13 located on the lower side of PCBA 2 can be pressed by interference with the lower surface of PCBA 2, so as to clamp and fix PCBA 2. In other examples, a supporting boss is provided on the lower side of PCBA 2, and the extrusion blocks 13 are located on the upper side of PCBA 2 and are pressed by interference with the upper surface of PCBA 2; or, a limiting boss is provided on the upper side of PCBA 2, and the extrusion blocks 13 are located on the lower side of PCBA 2 and are pressed by interference with the lower surface of PCBA 2.

[0039] Among them, for the multiple extrusion blocks 13 located on the same side of the PCBA 2 , at least two adjacent extrusion blocks 13 may be connected by a reinforcing plate to improve the strength of the extrusion blocks 13 .

[0040] In one possible implementation, the housing 1 is provided with an extrusion block 13. The extrusion block 13 can be integrally provided with the housing 1 through an integral molding process. Alternatively, the extrusion block 13 can be connected to the housing 1 through a fixed connection method such as welding or bonding.

[0041] The extrusion block 13 may be formed by a protrusion disposed on the inner wall of the housing 1. Exemplarily, at least one extrusion block 13 may be connected to the top wall of the housing 1 and extend downward; or, the extrusion block 13 may be connected to the upper portion of the inner side wall of the housing 1, and the extrusion block 13 may extend toward the inside of the installation space 1a and extend downward, so as to be extruded by interference with the upper surface of the PCBA 2.

[0042] Alternatively, at least one extrusion block 13 may be connected to the bottom wall of the housing 1 and extend upward; or, the extrusion block 13 is connected to the lower portion of the inner wall of the housing 1, and the extrusion block 13 extends toward the installation space 1a and extends upward to facilitate interference extrusion with the lower surface of the PCBA 2.

[0043] Optionally, when a plurality of extrusion blocks 13 can be respectively disposed on the upper side and the lower side of the PCBA 2, the extrusion blocks 13 located on the upper side and the lower side of the PCBA 2 can be disposed opposite to each other or staggered. The extrusion block 13 located on the upper side of the PCBA 2 can be connected to the top wall of the housing 1 and can also be connected to the upper part of the inner side wall of the housing 1 to improve the strength of the extrusion block 13; the extrusion block 13 located on the lower side of the PCBA 2 can be connected to the bottom wall of the housing 1 and can also be connected to the lower part of the inner side wall of the housing 1 to improve the strength of the extrusion block 13. Of course, the extrusion block 13 located on the upper side of the PCBA 2 can also be connected to one of the top wall of the housing 1 and the inner side wall of the housing 1; or, the extrusion block 13 located on the lower side of the PCBA 2 can also be connected to one of the bottom wall of the housing 1 and the inner side wall of the housing 1.

[0044] During assembly, take the housing 1, insert the PCBA 2 into the installation space 1a from the open end 1b, and then install the end cover 3 at the open end 1b. When the PCBA 2 is inserted into the installation space 1a and inserted into place, the extrusion block 13 can be extruded and fit with the surface of the PCBA 2 by interference, and the interference amount can be set according to actual needs.

[0045] In another possible implementation, the end cover 3 is provided with an extrusion block 13. The extrusion block 13 can be integrally provided with the end cover 3 through an integral molding process. Alternatively, the extrusion block 13 can be connected to the end cover 3 by a fixed connection method such as welding or bonding. The end cover 3 can have a cover body 31 and a folding edge 32, and the folding edge 32 is folded relative to the cover body 31 in a direction toward the installation space 1a. The extrusion block 13 can be connected to the cover body 31. When a plurality of extrusion blocks 13 can be respectively provided on the upper and lower sides of the PCBA 2, the extrusion block 13 located on the upper side of the PCBA 2 is connected to the cover body 31 and the folding edge 32; the extrusion block 13 located on the lower side of the PCBA 2 is connected to the cover body 31. Among them, the extrusion blocks 13 located on the upper and lower sides of the PCBA 2 can be arranged relative to each other or staggered.

[0046] During assembly, take the end cover 3 and the PCBA 2 , and mate the PCBA 2 with the extrusion block 13 on the end cover 3 ; insert the PCBA 2 into the installation space 1 a from the opening end 1 b until the end cover 3 is connected to the housing 1 .

[0047] The fixing device of PCBA provided in this embodiment is provided with a housing 1, a PCBA 2 and an end cover 3, wherein the housing 1 has an installation space 1a, and the installation space 1a has an open end 1b, the PCBA 2 is located in the installation space 1a, and the end cover 3 is provided at the open end 1b, and the housing 1 and / or the end cover 3 are provided with a plurality of extrusion blocks 13, the plurality of extrusion blocks 13 are distributed at intervals, and the plurality of extrusion blocks 13 are interference-extrusion-fitted with the PCBA 2. In this way, the PCBA 2 can be reliably fixed in the installation space 1a through the interference-extrusion-fitting between the PCBA 2 and the extrusion blocks 13 in the installation space 1a, so that bolts are no longer needed for fastening, which facilitates the simplification of the disassembly and assembly operation of the PCBA 2 and improves the disassembly and assembly efficiency of the PCBA 2.

[0048] Please continue to refer to Figures 1 to 3 In some embodiments, among the multiple extrusion blocks 13, at least one extrusion block 13 is located on the upper side of the PCBA 2, and at least one extrusion block 13 is located on the lower side of the PCBA 2, and each extrusion block 13 located on the upper side of the PCBA 2 and each extrusion block 13 located on the lower side of the PCBA 2 are respectively arranged correspondingly; wherein the up-down direction is parallel to the thickness direction Z of the PCBA 2. The above arrangement is conducive to ensuring the uniformity of the force on the PCBA 2.

[0049] Among them, each extrusion block 13 located on the upper side of the PCBA 2 is respectively arranged corresponding to each extrusion block 13 located on the lower side of the PCBA 2. It can be understood that: the orthographic projection of each extrusion block 13 located on the upper side of the PCBA 2 on a preset projection plane perpendicular to the thickness direction Z of the PCBA 2 is at least partially overlapped with the orthographic projection of each extrusion block 13 located on the lower side of the PCBA 2 on the preset projection plane.

[0050] Taking at least two extrusion blocks 13 arranged on the housing 1 as an example: the housing 1 includes: a first housing 11 and a second housing 12, and the first housing 11 can be located on the upper side of the second housing 12. Among them, the first housing 11 can include a first plate body and a first side panel, the first side panel is connected to each edge of the first plate body, and the first side panel is folded downward relative to the first plate body. The second housing 12 can include a second plate body and a second side panel, the second side panel is connected to each edge of the second plate body, and the second side panel is folded downward relative to the second plate body. The lower end of the first side panel can be docked with the upper end of the second side panel. In addition, the first housing 11 and the second housing 12 can be connected by a fixed connection method such as snap connection, screw connection or bonding. When disassembling the PCBA 2, there is no need to separate the first housing 11 and the second housing 12.

[0051] In some examples, the extrusion block 13 located on the upper side of the PCBA 2 is connected to the first plate body and the first side plate of the first shell 11; the extrusion block 13 located on the lower side of the PCBA 2 is connected to the first side plate of the first shell 11. Optionally, when there are multiple extrusion blocks 13 located on the lower side of the PCBA 2, at least two adjacent extrusion blocks 13 are connected by a reinforcing plate.

[0052] The extrusion block 13 located on the upper side of the PCBA 2 and the extrusion block 13 located on the lower side of the PCBA 2 are respectively arranged correspondingly. Optionally, the orthographic projection of the extrusion block 13 located on the upper side of the PCBA 2 on a preset projection plane perpendicular to the thickness direction Z of the PCBA 2 coincides with the orthographic projection of the extrusion block 13 located on the lower side of the PCBA 2 on the preset projection plane perpendicular to the thickness direction Z of the PCBA 2, so as to ensure the uniformity of the force on the PCBA 2.

[0053] In other examples, the first shell 11 is provided with an extrusion block 13 extending toward the second shell 12, and the extrusion block 13 can be connected to at least one of the first plate body and the first side plate, for example, the top end of the extrusion block 13 is connected to the first plate body, and one side of the extrusion block 13 is connected to the first side plate. The second shell 12 is provided with an extrusion block 13 extending toward the first shell 11, and the extrusion block 13 can be connected to at least one of the second plate body and the second side plate, for example, the top end of the extrusion block 13 is connected to the second plate body, and one side of the extrusion block 13 is connected to the second side plate.

[0054] The extrusion block 13 in the first shell 11 and the extrusion block 13 in the second shell 12 are respectively arranged correspondingly. That is, the orthographic projection of the extrusion block 13 in the first shell 11 on the preset projection plane perpendicular to the thickness direction Z of the PCBA 2 and the orthographic projection of the extrusion block 13 in the second shell 12 on the preset projection plane at least partially overlap. Optionally, the orthographic projection of the extrusion block 13 in the first shell 11 on the preset projection plane perpendicular to the thickness direction Z of the PCBA 2 and the orthographic projection of the extrusion block 13 in the second shell 12 on the preset projection plane coincide with each other, so as to ensure the uniformity of the force on the PCBA 2.

[0055] In other examples, the extrusion block 13 located at the lower side of the PCBA 2 may be connected to the second board body and the second side plate, and the extrusion block 13 located at the upper side of the PCBA 2 may be connected to the second side plate.

[0056] Take at least two extrusion blocks 13 disposed on the end cover 3 as an example: the extrusion block 13 located on the upper side of the PCBA 2 is connected to the cover body 31 and the folded edge 32; the extrusion block 13 located on the lower side of the PCBA 2 is connected to the cover body 31, and when there are multiple extrusion blocks 13 located on the lower side of the PCBA 2, at least two adjacent extrusion blocks 13 are connected by a reinforcing plate. The extrusion blocks 13 located on the upper side of the PCBA 2 and the extrusion blocks 13 located on the lower side of the PCBA 2 are respectively disposed correspondingly.

[0057] Please refer to Figures 2 to 5 In some embodiments, there is a distance d1 between the extrusion block 13 located on the upper side of the PCBA 2 and the corresponding extrusion block 13 located on the lower side of the PCBA 2, the thickness of the part where the PCBA 2 and the extrusion block 13 cooperate is d2, and the fixing device satisfies: d2>d1, and 0.1mm≤d2-d1≤0.2mm. Exemplarily, the difference between d2 and d1 can be 0.1mm or 0.12mm or 0.15mm or 0.18mm or 0.2mm, or the difference between any two of the above.

[0058] In this embodiment, by reasonably setting the difference between d2 and d1, both the installation reliability of the PCBA 2 and the assembly efficiency of the PCBA 2 can be ensured.

[0059] In some embodiments, the PCBA 2 has a first edge 2a and a second edge 2b that are oppositely disposed; wherein the second edge 2b is disposed toward the open end 1b.

[0060] Taking the PCBA 2 as an example, which is roughly rectangular, the cross section of the installation space 1a along the direction perpendicular to the thickness of the PCBA 2 is also roughly rectangular. The first edge 2a and the second edge 2b of the PCBA 2 can be long edges, and the second edge 2b is arranged closer to the opening end 1b than the first edge 2a. Accordingly, the PCBA 2 can also have a third edge and a fourth edge connected between the first edge 2a and the second edge 2b, and the third edge and the fourth edge are both wide edges.

[0061] In some examples, the portion of the PCBA 2 near the first edge 2a and the second edge 2b is interference fit with the extrusion block 13. For example, the portion of the first housing 11 near the first edge 2a is provided with a plurality of extrusion blocks 13 distributed at intervals, and the plurality of extrusion blocks 13 are respectively located on the upper and lower sides of the PCBA; the portion of the end cover 3 near the second edge 2b is provided with a plurality of extrusion blocks 13 distributed at intervals, and the plurality of extrusion blocks 13 are respectively located on the upper and lower sides of the PCBA, thereby ensuring the installation reliability of the PCBA 2 and taking into account the assembly efficiency of the PCBA 2.

[0062] In other examples, the portion of the PCBA 2 close to the third edge and the fourth edge may be in interference fit with the extrusion block 13 .

[0063] Figure 6 is a schematic diagram of the structure of a PCBA provided by an exemplary embodiment; Figure 7 is a schematic diagram of a partial structure of a buckle provided by an exemplary embodiment; Figure 8 It is a schematic diagram of the cooperation between a PCBA and an end cover provided by an exemplary embodiment.

[0064] Please refer to Figures 6 to 8 In some examples, a portion of the PCBA 2 close to the second edge 2 b is provided with a mounting hole 21 ; the end cover 3 is provided with a buckle 33 , and the buckle 33 is engaged with the mounting hole 21 .

[0065] Exemplarily, the mounting hole 21 includes a first through hole 211 and a second through hole 212, and the axial directions of the first through hole 211 and the second through hole 212 are parallel to the thickness direction Z of the PCBA 2; the first through hole 211 is located on the side of the second through hole 212 facing the second edge 2b, the aperture of the first through hole 211 is larger than the aperture of the second through hole 212, the first through hole 211 and the second through hole 212 are connected, and a limiting protrusion 213 is formed at the connection point between the first through hole 211 and the second through hole 212; for example, the cross-section of the mounting hole 21 along the direction perpendicular to the thickness of the PCBA 2 is roughly gourd-shaped.

[0066] The buckle 33 is used to move from the first through hole 211 to the second through hole 212 under the action of external force, and the limiting protrusion 213 is used to limit the buckle 33 from moving from the second through hole 212 to the first through hole 211 after the external force is removed, thereby realizing a non-return effect.

[0067] Exemplarily, the clip 33 includes a clip post 331 extending along the thickness direction Z of the PCBA 2, one end of the clip post 331 is connected to the end cover 3 through a connecting portion, the other end of the clip post 331 can extend from the mounting hole 21, and the portion of the clip post 331 extending from the mounting hole 21 forms a limiting portion 332, and the maximum dimension of the limiting portion 332 along the radial direction of the second through hole 212 is greater than the diameter of the second through hole 212. In addition, the maximum dimension of the limiting portion 332 along the radial direction of the first through hole 211 is less than or equal to the diameter of the first through hole 211, so as to reduce the difficulty of matching the clip 33 with the mounting hole 21.

[0068] Among them, when the first through hole 211 and the second through hole 212 are circular holes, the clamping column 331 can be a cylinder, and the limiting portion 332 can be a flange connected to the end of the clamping column 331, and the limiting portion 332 is used to limit the clamping column 331 from falling off from the mounting hole 21 along the axial direction.

[0069] The connecting part may include a connecting plate and a reinforcing plate. The connecting plate is connected between the cover body 31 and the snap-on column 331 . The reinforcing plate is connected to the connecting plate and the cover body 31 to improve the connection strength between the snap 33 and the cover body 31 , thereby improving the strength of the snap 33 .

[0070] In this embodiment, through the above arrangement, it is possible to ensure that the PCBA 2 is reliably connected to the end cover 3 and also to take into account the convenience of the installation operation.

[0071] In other embodiments, the mounting hole 21 may also be a rectangular hole or a hole of a circular or other shape, and the buckle 33 may have a plurality of elastic claws, which can be elastically deformed in opposite directions under the action of external force and smoothly inserted into the mounting hole 21. After the elastic claws partially extend out of the mounting hole 21, the force acting on the elastic claws is canceled, and the plurality of elastic claws have a tendency to return to the original state, thereby achieving the clamping connection between the buckle 33 and the mounting hole 21. Of course, the specific matching structure of the buckle 33 and the mounting hole 21 is not limited thereto, and this embodiment is only used as an example.

[0072] Fig. 9 This is a schematic diagram of the structure of a housing provided by an exemplary embodiment. Figure 1 ; Fig.10 This is a schematic diagram of the structure of a housing provided by an exemplary embodiment. Figure 2 ; Fig.11 It is a schematic diagram of the cooperation between a PCBA and a housing provided by an exemplary embodiment.

[0073] Please refer to Figures 9 to 11 In some embodiments, two opposite side walls of the housing 1 are provided with slide grooves 14, the slide grooves 14 are connected to the installation space 1a, and the two slide grooves 14 are respectively matched with the parts of the PCBA 2 close to the third edge and the second edge 2b. The slide grooves 14 are used to guide the PCBA 2 to move from the opening end 1b to the installation space 1a, thereby improving the convenience of installing the PCBA 2.

[0074] In some examples, the portion of the slide groove 14 away from the exit end 1b can be pressed and fit with the PCBA 2 by interference. Exemplarily, the slide groove 14 has a first section close to the opening end 1b and a second section away from the exit end 1b; in the first section of the slide groove 14, the distance between the upper and lower groove walls can be slightly greater than the thickness of the PCBA 2, so as to smoothly guide the PCBA 2 into the installation space 1a; in the second section of the slide groove 14, there is a minimum distance d3 between the upper and lower groove walls, and the thickness of the portion of the PCBA 2 that matches the second section of the slide groove 14 is d4, and the fixing device satisfies: d4>d3, and 0.1mm≤d4-d3≤0.2mm. Exemplarily, the difference between d4 and d3 can be 0.1mm or 0.12mm or 0.15mm or 0.18mm or 0.2mm, or the difference between any two of the above. Among them, d4 can be equal to or different from the aforementioned d2. In a specific implementation, along the direction away from the opening end 1 b , one of the groove walls of the sliding groove 14 gradually inclines toward the other groove wall opposite to the groove wall.

[0075] Optionally, along the width direction of the PCBA 2, the size of the first section of the slide groove 14 may be greater than the size of the second section of the slide groove 14, and the specific size of the second section of the slide groove 14 in this direction may be set according to actual needs.

[0076] In this embodiment, by reasonably setting the size of the slide slot 14 , both the installation reliability of the PCBA 2 and the assembly efficiency of the PCBA 2 can be ensured.

[0077] Fig.12a , Figure 12b and Fig.12c The figure is a schematic diagram of the assembly process of a PCBA fixture provided by an embodiment. The dotted arrows in the figure are used to indicate the installation direction.

[0078] The PCBA fixing device provided in this embodiment is used during assembly. Fig.12a and Figure 12b As shown, take the end cover 3 and PCBA 2, insert the buckle 33 of the end cover 3 into the first through hole 211 of the PCBA 2, and make the buckle 33 move in the direction toward the second through hole 212, until the buckle 33 passes through the connection between the first through hole 211 and the second through hole 212 to form a limiting protrusion 213 and cooperate with the second through hole 212, and at the same time, the part of the PCBA 2 close to the second edge 2b is sandwiched between the upper and lower extrusion blocks 13 of the end cover 3; Fig.12c As shown, the PCBA 2 is inserted into the installation space 1a from the open end 1b, and the PCBA 2 is gradually moved into the installation space 1a along the slide groove 14 until the PCBA 2 is installed in place. At the same time, the end cover 3 is snap-fitted with the housing 1, and the assembly is completed.

[0079] In the above assembly process, there is no need to use fasteners such as screws, which not only reduces material costs and assembly costs, but also avoids risks such as short circuits caused by falling screws.

[0080] The PCBA fixing device provided in this embodiment can be applied to a vehicle controller, and can also be applied to other control scenarios where the PCBA 2 needs to be used.

[0081] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0082] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0083] In addition, the terms "first", "second", etc. used in the embodiments of the present invention are only used for descriptive purposes and should not be understood as indicating or implying relative importance, or implicitly indicating the number of technical features indicated in the embodiments. Therefore, the features defined by the terms "first", "second", etc. in the embodiments of the present invention can explicitly or implicitly indicate that the embodiment includes at least one of the features. In the description of the present invention, the word "multiple" means at least two or two or more, such as two, three, four, etc., unless otherwise clearly and specifically defined in the embodiments.

[0084] In the present utility model, unless otherwise clearly specified or limited in the embodiments, the terms "install", "connect", "connect" and "fix" etc. appearing in the embodiments should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integrated connection. It can be understood that it can also be a mechanical connection, an electrical connection, etc.; of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements, or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific implementation situation.

[0085] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0086] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A PCBA fixing device, characterized in that: include: A housing (1), the housing (1) having an installation space (1a), and the installation space (1a) having an open end (1b); A PCBA (2), the PCBA (2) being located in the installation space (1a); An end cover (3), the end cover (3) being arranged to cover the opening end (1b); Wherein, the housing (1) and / or the end cover (3) are provided with a plurality of extrusion blocks (13), the plurality of extrusion blocks (13) are distributed at intervals, and the plurality of extrusion blocks (13) are interference-extrusion-fitted with the PCBA (2).

2. The fixing device according to claim 1, characterized in that: Among the plurality of extrusion blocks (13), at least one extrusion block (13) is located on the upper side of the PCBA (2), and at least one extrusion block (13) is located on the lower side of the PCBA (2), and each extrusion block (13) located on the upper side of the PCBA (2) and each extrusion block (13) located on the lower side of the PCBA (2) are respectively arranged correspondingly; wherein the up-down direction is parallel to the thickness direction (Z) of the PCBA (2).

3. The fixing device according to claim 2, characterized in that: There is a distance d1 between the extrusion block (13) located on the upper side of the PCBA (2) and the corresponding extrusion block (13) located on the lower side of the PCBA (2), the thickness of the part where the PCBA (2) and the extrusion block (13) match is d2, and the fixing device satisfies: 0.1mm≤d2-d1≤0.2mm.

4. The fixing device according to claim 1, characterized in that: The PCBA (2) has a first edge (2a) and a second edge (2b) that are arranged opposite to each other; wherein the second edge (2b) is arranged toward the opening end (1b).

5. The fixing device according to claim 4, characterized in that: Portions of the PCBA (2) close to the first edge (2a) and the second edge (2b) are respectively fitted in an interference fit with the extrusion block (13); The extrusion block (13) close to the first edge (2a) of the PCBA (2) is connected to the housing (1); and the extrusion block (13) close to the second edge (2b) of the PCBA (2) is connected to the end cover (3).

6. The fixing device according to claim 4, characterized in that: A mounting hole (21) is provided at a portion of the PCBA (2) close to the second edge (2b); and a buckle (33) is provided on the end cover (3), and the buckle (33) is buckled with the mounting hole (21).

7. The fixing device according to claim 6, characterized in that: The mounting hole (21) comprises a first through hole (211) and a second through hole (212), wherein the axial directions of the first through hole (211) and the second through hole (212) are parallel to the thickness direction (Z) of the PCBA (2); The first through hole (211) is located on a side of the second through hole (212) facing the second edge (2b); the diameter of the first through hole (211) is larger than the diameter of the second through hole (212); the first through hole (211) and the second through hole (212) are connected; and a limiting protrusion (213) is formed at the connection point between the first through hole (211) and the second through hole (212); The buckle (33) is used to move from the first through hole (211) to the second through hole (212) under the action of an external force, and the limiting protrusion (213) is used to limit the buckle (33) from moving from the second through hole (212) to the first through hole (211) after the external force is removed.

8. The fixing device according to claim 7, characterized in that: The buckle (33) comprises a clamping column (331) extending in the thickness direction of the PCBA (2), one end of the clamping column (331) is connected to the end cover (3) via a connecting portion, the other end of the clamping column (331) can extend from the mounting hole (21), and the portion of the clamping column (331) extending from the mounting hole (21) forms a limiting portion (332), and the maximum dimension of the limiting portion (332) along the radial direction of the second through hole (212) is greater than the diameter of the second through hole (212).

9. The fixing device according to claim 4, characterized in that: The PCBA (2) further comprises a third edge and a fourth edge which are arranged opposite to each other, wherein the third edge and the fourth edge are both located between the first edge (2a) and the second edge (2b); Two opposite side walls of the housing (1) are provided with slide grooves (14), the slide grooves (14) are arranged in communication with the installation space (1a), the two slide grooves (14) respectively cooperate with the parts of the PCBA (2) close to the third edge and the second edge (2b), and the slide grooves (14) are used to guide the PCBA (2) to move from the opening end (1b) into the installation space (1a).

10. The fixing device according to claim 9, characterized in that: The portion of the slide groove (14) that is away from the opening end (1b) can be interference-pressed with the PCBA (2).

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