CN214675871U - Circuit board assembly - Google Patents

Abstract

The utility model provides a circuit board assembly, include: a main board; the circuit board is detachably arranged on the main board, and a first bayonet is arranged on the circuit board; first mount, including mount body, joint portion and the flexible portion of connecting between mount body and the joint portion, the mount body is connected with mainboard detachably, and joint portion has the joint position that is located first bayonet socket and breaks away from the unblock position of first bayonet socket. The technical scheme of this application has solved the circuit board installation among the correlation technique effectively and has dismantled the difficult problem.

Description

Circuit board assembly

Technical Field

The utility model relates to a fire alarm field particularly, relates to a circuit board subassembly.

Background

In the fire alarm controller, a circuit board assembly is arranged in the fire alarm controller, the circuit board assembly comprises a circuit board and a mainboard electrically connected with the circuit board, and the circuit board can be detached from the mainboard for replacement when necessary.

As shown in fig. 1 to 3, the circuit board 1 is connected to the main board 2 through a fixing structure, and the fixing structure includes a fixing bracket 3, a hook 4, a nut 5 and a screw 6. The hook 4 is arranged on the fixed bracket 3. In the process that the circuit board 1 is installed on the mainboard 2, the nut 5 is installed in the fixed bolster 3 earlier, and the fixed bolster 3 is inserted the fixed orifices position on the mainboard 2 again, is connected with the nut 5 from the for the screw 6 of mainboard another side again, makes fixed bolster 3 and mainboard 2 accomplish fixedly. The circuit board 1 is fixed on the fixed bracket 3 through the hook 4.

However, the circuit board can be clamped by the whole fixing support which is required to deform outwards during circuit board installation, and the fixing support is high in strength and not easy to deform, so that the circuit board is difficult to install and disassemble.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a circuit board assembly for solving the problems of the circuit board assembly and the disassembly difficulty in the related art.

In order to achieve the above object, the utility model provides a circuit board assembly, include: a main board; the circuit board is detachably arranged on the main board, and a first bayonet is arranged on the circuit board; first mount, including mount body, joint portion and the flexible portion of connecting between mount body and the joint portion, the mount body is connected with mainboard detachably, and joint portion has the joint position that is located first bayonet socket and breaks away from the unblock position of first bayonet socket.

Further, joint portion includes that first standing arm, second stand arm and joint post, and first standing arm and second stand the arm interval and set up on the mount body, and the joint post setting is between first standing arm and second stand arm, joint post and the cooperation of first bayonet socket joint.

Further, joint portion includes connecting portion, and connecting portion connect on the mount body, and first grudging post and second grudging post set up on connecting portion with the interval, form the space of dodging the circuit board between joint post and the connecting portion.

Further, connecting portion include first linkage segment and set up second linkage segment and the third linkage segment on first linkage segment at an interval, and first arm setting is on the second linkage segment, and the arm setting is found on the third linkage segment to the second, and flexible portion includes first flexible section and second flexible section, and first flexible section is connected between second linkage segment and mount body, and the flexible section of second is connected between third linkage segment and mount body.

Further, the first fixing frame further comprises an operation part arranged on the clamping part.

Further, the first bayonet has an opening, and the width of opening is less than the diameter of first bayonet.

Further, the first fixing frame further comprises a limiting groove formed in the fixing frame body, and the side portion of the circuit board is inserted into the limiting groove.

Furthermore, the fixing frame body is connected with the main board through a first locking structure, the first locking structure comprises a first locking hole formed in the main board and a locking portion arranged at the bottom of the fixing frame body, and the locking portion is provided with a dismounting position capable of penetrating through the first locking hole and a locking position matched with the first locking hole in a stopping manner; the first fixing frame further comprises a limiting part, the limiting part and the locking part are arranged at intervals along the axis direction of the fixing frame body, and when the locking part is located at the locking position, the limiting part and the locking part respectively stop the upper side and the lower side of the main board.

Furthermore, the circuit board assembly further comprises a second fixing frame, the second fixing frame is connected with the main board through a second locking structure, the first fixing frame and the second fixing frame are respectively located on two opposite sides of the circuit board, and a second bayonet is further arranged on the circuit board, wherein the second fixing frame is identical to the first fixing frame in structure, and the second locking structure is identical to the first locking structure.

Further, the circuit board assembly further comprises a first connecting terminal arranged on the main board and a second connecting terminal arranged on the circuit board, and the first connecting terminal can be matched with the second connecting terminal in an inserting mode.

Use the technical scheme of the utility model, circuit board components include: mainboard, circuit board and first mount. Circuit board detachably sets up on the mainboard, the first bayonet socket that is provided with on the circuit board. The first fixing frame comprises a fixing frame body, a clamping portion and a flexible portion connected between the fixing frame body and the clamping portion. The fixing frame body is detachably connected with the main board, and the clamping portion is provided with a clamping position located in the first clamping opening and an unlocking position separated from the first clamping opening. The plasticity of flexible portion is better for joint portion can be for the swing of mount body, makes joint portion can switch between joint position and unblock position. The in-process on the mainboard is installed to the circuit board, fixes the mount body on the mainboard, inserts the circuit board on the mainboard again, and joint portion swings to the joint position from the unblock position, fixes the circuit board on the mainboard. In the process that the circuit board is dismantled from the mainboard, the joint portion swings to the unblock position from the joint position, can dismantle the circuit board from the mainboard. The circuit board carries out the process of dismouting on the mainboard, need not to make whole mount outwards warp, and the easy dismouting of circuit board is favorable to improving the installation effectiveness. Therefore, the technical scheme of the application effectively solves the problem that the circuit board in the related art is difficult to mount and dismount.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification

Fig. 1 is a perspective view of a related art wiring board assembly;

FIG. 2 shows an exploded schematic view of the circuit board assembly of FIG. 1;

FIG. 3 shows a schematic partial cross-sectional view of the wiring board assembly of FIG. 1;

fig. 4 shows a schematic front view of an embodiment of a circuit board assembly according to the invention;

FIG. 5 shows an exploded schematic view of the circuit board assembly of FIG. 4;

FIG. 6 is an exploded view of the first and second fixtures of FIG. 4 during installation;

fig. 7 is a schematic perspective view illustrating the first and second fixing frames of fig. 4 mounted on a main board;

FIG. 8 is a perspective view of the first fastening frame of FIG. 4;

FIG. 9 is a schematic perspective view of the first fastening frame of FIG. 4 after being laid down;

FIG. 10 shows a schematic side view of the first mount of FIG. 4;

FIG. 11 shows a schematic top view of the main plate of FIG. 4; and

fig. 12 shows a front view schematic of the wiring board of fig. 4.

Wherein the figures include the following reference numerals:

1. a circuit board; 2. a main board; 3. fixing a bracket; 4. a hook; 5. a nut; 6. a screw; 10. a main board; 11. a first lock hole; 111. avoiding a hole section; 112. a pivot bore section; 12. a notch; 13. a second lock hole; 20. a circuit board; 21. a first bayonet; 22. a second bayonet; 30. a first fixing frame; 31. a fixed frame body; 311. a fixed section; 312. a connecting section; 32. a clamping part; 321. a connecting portion; 3211. a first connection section; 3212. a second connection section; 3213. a third connection section; 322. a first vertical arm; 323. a second vertical arm; 324. a clamping column; 325. avoiding a space; 33. a flexible portion; 331. a first flexible segment; 332. a second flexible section; 34. a limiting part; 35. a locking portion; 351. a rotating shaft; 352. a locking projection; 36. a fool-proof projection; 37. a limiting groove; 38. an operation section; 40. a second fixing frame; 50. a first connection terminal; 60. a second connection terminal.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 4 to 10, the wiring board assembly of the present embodiment includes: mainboard 10, circuit board 20 and first mount 30. The circuit board 20 is detachably arranged on the main board 10, and the first bayonet 21 is arranged on the circuit board 20. The first holder 30 includes a holder body 31, a clamping portion 32, and a flexible portion 33 connecting between the holder body 31 and the clamping portion 32. The fixing frame body 31 is detachably connected with the main board 10, and the clamping portion 32 has a clamping position located in the first clamping opening 21 and an unlocking position separated from the first clamping opening 21.

By applying the technical scheme of the embodiment, the circuit board assembly comprises: mainboard 10, circuit board 20 and first mount 30. The circuit board 20 is detachably arranged on the main board 10, and the first bayonet 21 is arranged on the circuit board 20. The first holder 30 includes a holder body 31, a clamping portion 32, and a flexible portion 33 connecting between the holder body 31 and the clamping portion 32. The fixing frame body 31 is detachably connected with the main board 10, and the clamping portion 32 has a clamping position located in the first clamping opening 21 and an unlocking position separated from the first clamping opening 21. The plasticity of the flexible portion 33 is good, so that the clamping portion 32 can swing relative to the fixed frame body 31, and the clamping portion 32 can be switched between a clamping position and an unlocking position. In the process that the circuit board 20 is installed on the main board 10, the fixing frame body 31 is fixed on the main board 10, the circuit board 20 is inserted on the main board 10, and the clamping portion 32 swings from the unlocking position to the clamping position to fix the circuit board 20 on the main board 10. In the process of detaching the circuit board 20 from the motherboard 10, the clamping portion 32 swings from the clamping position to the unlocking position, so that the circuit board 20 can be detached from the motherboard 10. The process of dismouting is carried out to circuit board 20 on mainboard 10, need not to make whole mount outwards warp, and easy dismouting of circuit board 20 is favorable to improving the installation effectiveness. Therefore, the technical scheme of the embodiment effectively solves the problem that the circuit board in the related art is difficult to mount and dismount.

As shown in fig. 8 to 12, the catching portion 32 includes a first standing arm 322, a second standing arm 323, and a catching column 324. The first standing arm 322 and the second standing arm 323 are arranged on the fixing frame body 31 at intervals, the clamping column 324 is arranged between the first standing arm 322 and the second standing arm 323, and the clamping column 324 is in clamping fit with the first bayonet 21. The first standing arm 322 and the second standing arm 323 are arranged to support the snap-in post 324, so that an avoiding space 325 can be formed between the snap-in post 324 and the connecting portion 321. The clip column 324 is clipped in the first bayonet 21, and can play a role of firmly fixing the clip portion 32 on the circuit board 20. Preferably, the snap column 324 is matched with the first bayonet 21 in structural shape.

As shown in fig. 8, in order to fix the first standing arm 322 and the second standing arm 323 to the fastening portion 32, the fastening portion 32 includes a connecting portion 321, and the connecting portion 321 is connected to the fixing frame body 31. The first standing arm 322 and the second standing arm 323 are disposed on the connecting portion 321 at an interval, and a space 325 for avoiding the circuit board 20 is formed between the snap-in post 324 and the connecting portion 321.

As shown in fig. 8, the connection portion 321 includes a first connection segment 3211, and a second connection segment 3212 and a third connection segment 3213 which are arranged at intervals on the first connection segment 3211. The first standing arm 322 is disposed on the second connecting segment 3212, the second standing arm 323 is disposed on the third connecting segment 3213, the flexible portion 33 includes a first flexible segment 331 and a second flexible segment 332, the first flexible segment 331 is connected between the second connecting segment 3212 and the fixing frame body 31, and the second flexible segment 332 is connected between the third connecting segment 3213 and the fixing frame body 31. The second connection segment 3212 and the third connection segment 3213 can form a certain interval, so that a certain interval is formed between the first standing arm 322 located on the second connection segment 3212 and the second standing arm 323 located on the third connection segment 3213, and an avoiding space 325 is easily formed between the clamping column 324 and the connection portion 321.

As shown in fig. 8 to 10, in order to facilitate the operation of the clamping portion 32, the first fixing frame 30 further includes an operation portion 38 provided on the clamping portion 32. Thus, the operation is easy, and the installation efficiency is improved.

As shown in fig. 12, the first bayonet 21 has an opening, and the width of the opening is smaller than the diameter of the first bayonet 21. Thus, the engaging column 324 located in the first engaging opening 21 is reliably engaged with the first engaging opening 21, and the engaging column 324 is prevented from being disengaged from the first engaging opening 21.

As shown in fig. 4, 8 and 9, the first fixing frame 30 further includes a limiting groove 37 disposed on the fixing frame body 31, and the side portion of the circuit board 20 is inserted into the limiting groove 37. In the process of inserting the circuit board 20 on the main board 10, the lateral part of the main board 10 enters the limiting groove 37 along the groove lateral wall of the limiting groove 37, and the limiting groove 37 plays a guiding role and can limit the main board 10 to prevent from toppling over, thereby being beneficial to improving the stability of the first fixing frame 30 for fixing the circuit board 20.

In the related art, in the process of mounting the circuit board on the main board, the fixing bracket needs to be fixed by matching a nut and a screw. Make the operation in-process loaded down with trivial details, lead to installation and dismantlement inefficiency.

In order to solve the problem of low efficiency of mounting or dismounting the circuit board on or from the main board, as shown in fig. 4 to 8, in the present embodiment, the fixing frame body 31 is connected to the main board 10 through a first locking structure. The first locking structure includes a first locking hole 11 provided on the main board 10 and a locking portion 35 provided at the bottom of the mount body 31, and the locking portion 35 has an attachable/detachable position capable of passing through the first locking hole 11 and a locking position in backstop cooperation with the first locking hole 11. The first fixing frame 30 further includes a limiting portion 34, the limiting portion 34 and the locking portion 35 are disposed at intervals along the axial direction of the fixing frame body 31, and when the locking portion 35 is located at the locking position, the limiting portion 34 and the locking portion 35 respectively stop the upper and lower sides of the main board 10.

By applying the technical scheme of the embodiment, in the process that the circuit board 20 is installed on the main board 10, when the locking portion 35 passes through the first locking hole 11 and is switched from the dismounting position to the locking position, the first fixing frame 30 can be fixed on the main board 10 through the locking portion 35, the circuit board 20 is inserted on the main board 10, the fixing frame body 31 is connected with the circuit board 20, and then the circuit board 20 is installed on the main board 10. In the process of detaching the circuit board 20 from the motherboard 10, the first fixing frame 30 and the circuit board 20 are detached, so that the circuit board 20 can be detached from the motherboard 10. The process of dismouting is carried out to circuit board 20 on mainboard 10, need not to use nut and screw cooperation, and the easy dismouting of circuit board 20 is favorable to improving the installation effectiveness.

As shown in fig. 4, 8 and 9, the stopper portion 34 is two arc-shaped pieces each of which is bent toward the locking portion 35. Thus, the stopper portion 34 provided in a bent state can be elastically deformed when pressed. The curved arrangement described above brings the fixed end to the free end of the arcuate tab closer and closer to the main panel 10. When the locking portion 35 is located at the locking position, the bent limiting portion 34 presses the upper side of the main board 10, and the locking portion 35 stops at the lower side of the main board 10, so that the first fixing frame 30 is fixed on the main board 10.

As shown in fig. 8 and 9, in order to facilitate the provision of the stopper portion 34 and the locking portion 35 on the holder body 31, the holder body 31 includes a fixing section 311 and a connecting section 312 connected to the fixing section 311. The fixing section 311 is detachably connected to the circuit board 20, and the stopper portion 34 and the locking portion 35 are provided at intervals on the connecting section 312. When the locking portion 35 is located at the locking position, a part of the connecting piece 312 is located in the first lock hole 11. Thus, the provision of the connection section 312 facilitates the positioning of the locking portion 35 on the lower side of the main board 10.

As shown in fig. 8, 9 and 11, the first lock hole 11 includes an escape hole section 111 and a pivot hole section 112 communicating with each other. The locking portion 35 includes a rotation shaft 351 and a locking projection 352 provided on the rotation shaft 351. The rotating shaft 351 is matched with the pivoting hole section 112 to play a positioning role, and the locking lug 352 is matched with the avoiding hole section 111. The locking projection 352 is disposed to be offset from the escape hole section 111 when the locking portion 35 is in the locking position. As such, the length of the pivot bore section 112 is less than the length of the escape bore section 111 such that the locking tab 352 cannot disengage from both the pivot bore section 112 and the escape bore section 111.

As shown in fig. 8, 9 and 11, the locking portion 35 is provided with a fool-proof projection 36. The main board 10 is further provided with a notch 12 avoiding the fool-proof protrusion 36, and the notch 12 is communicated with the first lock hole 11. In the process that the locking part 35 passes through the first locking hole 11, the matching of the fool-proof protrusion 36 and the notch 12 enables the locking projection 352 to have a determined passing position, which is beneficial to improving the installation efficiency of the first fixing frame 30.

As shown in fig. 4 to 8, the circuit board assembly further includes a second fixing frame 40, the second fixing frame 40 is connected to the main board 10 through a second locking structure, the first fixing frame 30 and the second fixing frame 40 are respectively located at two opposite sides of the circuit board 20, and the circuit board 20 is further provided with a second bayonet 22, wherein the second fixing frame 40 has the same structure as the first fixing frame 30, and the second locking structure is the same as the first locking structure. The clamping portion of the second fixing frame 40 has a clamping position located in the second bayonet 22 and an unlocking position separated from the second bayonet 22. In this way, the first fixing frame 30 and the second fixing frame 40 are respectively located at two opposite sides of the circuit board 20, and effectively fix the circuit board 20, so that the circuit board 20 is reliably fixed on the main board 10. The main board 10 is further provided with a second locking hole 13. The locking portion of the second fixing bracket 40 has a detachable position capable of passing through the second locking hole 13 and a locking position in backstop engagement with the second locking hole 13.

In the present embodiment, as shown in fig. 4 to 7, the first fixing frame 30 is passed through the first locking hole 11 according to a downward arrow direction, so that the locking portion of the first fixing frame 30 is located at the dismounting position, and then the first fixing frame 30 is rotated by 90 ° according to a clockwise arrow, so that the locking portion of the first fixing frame 30 is located at the locking position, so as to fix the first fixing frame 30 on the main board 10. The second fixing frame 40 passes through the second locking hole 13 according to the direction of the downward arrow, so that the locking portion of the second fixing frame 40 is located at the dismounting position, and after the second fixing frame 40 is rotated by 90 degrees according to the clockwise arrow, the locking portion of the second fixing frame 40 is located at the locking position, so that the second fixing frame 40 is fixed on the main board 10. At this time, the fool-proof protrusion of the first fixing frame 30 and the fool-proof protrusion of the second fixing frame 40 are oppositely disposed.

As shown in fig. 4 to 7, the circuit board assembly further includes a first connection terminal 50 provided on the main board 10 and a second connection terminal 60 provided on the circuit board 20, and the first connection terminal 50 is capable of being plug-fitted with the second connection terminal 60. Thus, the circuit board 20 and the main board 10 can be electrically conducted.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device 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 or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A circuit board assembly, comprising:

a main board (10);

the circuit board (20) is detachably arranged on the main board (10), and a first bayonet (21) is arranged on the circuit board (20);

first mount (30), including mount body (31), joint portion (32) and connection mount body (31) with flexible portion (33) between joint portion (32), mount body (31) with mainboard (10) detachably connects, joint portion (32) have and are located joint position in first bayonet socket (21) and break away from the unblock position of first bayonet socket (21).

2. The circuit board assembly according to claim 1, wherein the clamping portion (32) comprises a first standing arm (322), a second standing arm (323) and a clamping column (324), the first standing arm (322) and the second standing arm (323) are arranged on the fixing frame body (31) at intervals, the clamping column (324) is arranged between the first standing arm (322) and the second standing arm (323), and the clamping column (324) is in clamping fit with the first bayonet (21).

3. The circuit board assembly according to claim 2, wherein the clamping portion (32) comprises a connecting portion (321), the connecting portion (321) is connected to the fixing frame body (31), the first standing arm (322) and the second standing arm (323) are arranged on the connecting portion (321) at intervals, and an avoiding space (325) for avoiding the circuit board (20) is formed between the clamping column (324) and the connecting portion (321).

4. The circuit board assembly according to claim 3, wherein the connecting portion (321) comprises a first connecting section (3211) and a second connecting section (3212) and a third connecting section (3213) which are arranged at intervals on the first connecting section (3211), the first standing arm (322) is arranged on the second connecting section (3212), the second standing arm (323) is arranged on the third connecting section (3213), the flexible portion (33) comprises a first flexible section (331) and a second flexible section (332), the first flexible section (331) is connected between the second connecting section (3212) and the holder body (31), and the second flexible section (332) is connected between the third connecting section (3213) and the holder body (31).

5. The wiring board assembly according to claim 1, wherein the first fixing frame (30) further comprises an operating portion (38) provided on the snap-in portion (32).

6. The cord plate assembly of claim 1, wherein the first bayonet (21) has an opening having a width less than a diameter of the first bayonet (21).

7. The circuit board assembly according to claim 1, wherein the first fixing frame (30) further comprises a limiting groove (37) provided on the fixing frame body (31), and a side portion of the circuit board (20) is inserted in the limiting groove (37).

8. The wiring board assembly of claim 1,

the fixing frame body (31) is connected with the main board (10) through a first locking structure, the first locking structure comprises a first locking hole (11) formed in the main board (10) and a locking portion (35) arranged at the bottom of the fixing frame body (31), and the locking portion (35) is provided with a dismounting position capable of penetrating through the first locking hole (11) and a locking position in backstop fit with the first locking hole (11);

the first fixing frame (30) further comprises a limiting part (34), the limiting part (34) and the locking part (35) are arranged at intervals along the axis direction of the fixing frame body (31), and when the locking part (35) is located at the locking position, the limiting part (34) and the locking part (35) are respectively stopped and arranged on the upper side and the lower side of the main board (10).

9. The circuit board assembly according to claim 8, further comprising a second fixing frame (40), wherein the second fixing frame (40) is connected to the main board (10) through a second locking structure, the first fixing frame (30) and the second fixing frame (40) are respectively located at two opposite sides of the circuit board (20), and a second bayonet (22) is further disposed on the circuit board (20), wherein the second fixing frame (40) has the same structure as the first fixing frame (30), and the second locking structure is the same as the first locking structure.

10. The wiring board assembly according to claim 1, further comprising a first connection terminal (50) provided on the main board (10) and a second connection terminal (60) provided on the wiring board (20), the first connection terminal (50) being capable of being plug-fitted with the second connection terminal (60).

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