TW202121959A - Fixing assembly - Google Patents

Abstract

A fixing assembly includes a casing, a first support component, a contact component and a circuit board. The casing has a carrying surface. The first support component is disposed on the carrying surface of the casing. The contact component includes a seat part and a stand part connected to each other. The seat part is disposed on the carrying surface of the casing. The stand part has a first contact surface. The first contact surface and the carrying surface together form an acute angle therebetween. The circuit board is movably disposed on the first support component, and the circuit board is movably in contact with the first contact surface of the stand part.

Description

Circuit board fixing assembly

The present invention relates to a circuit board fixing assembly, in particular to a circuit board fixing assembly having a supporting member and a supporting member respectively supporting and supporting the circuit board.

Nowadays, the world is in an era of rapid development of information technology. Both companies and individuals have already used personal computers (such as desktop computers, notebook computers, etc.) to process business. With the maturity of communication technology, ordinary personal computers can no longer meet the needs of enterprises for their business. Therefore, the computer industry has developed various types of servers for enterprises to use in their business.

Generally speaking, a circuit board is provided in the chassis of the server. The circuit board is fixed between the two limiting planes of the fixing member, and an electrical connector is arranged on the circuit board for electrical connection with other electronic components in the server. However, the size of the circuit board and the fixing part may have tolerances in manufacturing, so that the circuit board may be installed on the fixing part due to the thickness tolerance of the circuit board or the height tolerance of the two limit planes of the fixing part. The circuit board is not in the correct position, so when the electrical connector on the circuit board is mated with other electronic components, stress is easily generated on the electrical connector, which increases the probability of damage to the electrical connector. Therefore, the current research and development personnel in this field are working to solve the above-mentioned problems.

The present invention is to provide a circuit board fixing assembly, so as to solve the problem that when the electric connector on the circuit board is docked with other electronic components in the prior art, the probability of damage to the electric connector is increased due to the tolerance of the circuit board and the abutting parts. problem.

A circuit board fixing assembly disclosed in an embodiment of the present invention includes a housing, a first supporting member, a supporting member, and a circuit board. The shell has a bearing surface. The first support is arranged on the bearing surface of the shell. The supporting member includes a connecting body part and a vertical part. The seat body portion is arranged on the bearing surface of the casing, the vertical portion includes a first abutting surface, and the first abutting surface and the bearing surface of the casing form an acute angle. The circuit board is movably disposed on the first support, and the circuit board movably abuts against the first abutment surface of the vertical portion.

According to the circuit board fixing assembly disclosed in the above embodiment, since the circuit board is movably arranged on the first supporting member, and the circuit board movably abuts against the first abutment surface of the vertical portion, and the first abutment surface of the vertical portion of the supporting member The abutment surface and the bearing surface of the housing have an acute angle, so even if the circuit board has tolerances, the position of the circuit board can still be adjusted to keep the circuit board in a proper position and maintain the first abutment against the vertical portion. Lean against the surface, so that the electrical connector on the circuit board can be more accurately butted with other electronic components, thereby reducing the probability of damage to the electrical connector.

The above description of the content of the present invention and the description of the following embodiments are used to demonstrate and explain the principle of the present invention, and to provide a further explanation of the scope of the patent application of the present invention.

Please refer to Figure 1 to Figure 5. FIG. 1 is a three-dimensional schematic diagram of the circuit board fixing assembly according to the first embodiment of the present invention. Fig. 2 is an exploded schematic diagram of Fig. 1. Fig. 3 is a partially enlarged schematic diagram of the circuit board of Fig. 2. Fig. 4 is a schematic top view of Fig. 1. Fig. 5 is a schematic cross-sectional view of Fig. 1.

In this embodiment, the circuit board fixing assembly 1 includes a housing 10, two first supporting members 20, a supporting member 30 and a circuit board 40. In addition, in this embodiment or other embodiments, the circuit board fixing assembly 1 further includes a second support 50 and a motherboard 60.

The casing 10 is, for example, a casing of a server, and the casing 10 includes a bearing surface 11. The two first support members 20 are respectively fixed at different positions of the bearing surface 11 of the housing 10. The two first supports 20 are the same element, so only one of the first supports 20 will be described in detail below. The first support 20 includes a body 21, a neck 22 and a head 23. The body 21 of the first support 20 is fixed to the bearing surface 11 of the housing 10, and the neck 22 is located between the body 21 and the head 23 and connects the body 21 and the head 23. The width W1 of the head 23 and the width W2 of the body 21 are larger than the width W3 of the neck 22.

In this embodiment, the circuit board fixing assembly 1 may further include two studs 70 and two screws 80, for example. The two studs 70 are fixed on the bearing surface 11 of the housing 10, and for example, both have internal threads. The main board 60 abuts against the side of the two studs 70 away from the bearing surface 11 of the casing 10, and the two screws 80 pass through the main board 60 and are respectively locked to the two studs 70, so that the main board 60 is fixed to the casing 10 , And keep a distance from the bearing surface 11 of the housing 10. The second support 50 includes an assembly barrel 51. The assembly cylinder 51 is fixed to the bearing surface 11 of the housing 10. The body 21 of the first support 20 penetrates the main board 60, and the main board 60 abuts on the side of the assembly cylinder 51 of the second support 50 away from the bearing surface 11 of the housing 10.

The supporting member 30 includes a body portion 31 and a vertical portion 32. The vertical portion 32 includes a straight plate 321 and an inclined plate 322 connected to each other. The straight plate 321 is connected to the base portion 31 at a side away from the inclined plate 322, and the straight plate 321 is substantially perpendicular to the base portion 31. The obtuse angle θ1 is formed between the inclined plate 322 and the straight plate 321, and the obtuse angle θ1 is, for example, greater than or equal to 135 degrees and less than or equal to 165 degrees. In this embodiment, the seat portion 31 includes a guiding groove 311, and the second support 50 further includes a stud 52, and the stud 52 includes a head 521 and a body 522 connected to each other. The outer diameter of the head 521 of the stud 52 is larger than the outer diameter of the body 522, and the body 522 has, for example, an external thread. The base portion 31 is stacked on a side of the main board 60 away from the assembly barrel 51 of the second support 50. The body 522 of the stud 52 penetrates the guide groove 311 of the base 31 and the main board 60 and is locked in the assembly cylinder 51 of the second support 50, and the head 521 of the stud 52 abuts against the base The part 31 is away from the side of the main board 60. In this embodiment, the seat portion 31 and the main board 60 are located between the head 521 of the stud 52 and the assembly barrel 51, and the seat portion 31 is slidably disposed on the housing through the body 522 of the stud 52 and the assembly barrel 51. The bearing surface 11 of the body 10. In addition, in this embodiment, the inclined plate 322 of the vertical portion 32 of the supporting member 30 includes a first abutting surface 3221, and the first abutting surface 3221 and the supporting surface 11 of the housing 10 form an acute angle θ2. In other words, the first abutting surface 3221 is an inclined surface.

The circuit board 40 includes a board portion 41 and an abutting portion 42. The plate portion 41 includes a first outer side surface 411, a second outer side surface 412, a third outer side surface 413, two groove side surfaces 414 and 415 and a groove bottom surface 416. The first outer side surface 411, the second outer side surface 412, and the third outer side surface 413 respectively face different directions, and two opposite sides of the first outer side surface 411 are connected to the second outer side surface 412 and the third outer side surface 413, respectively. The groove side surface 414 is closer to the second outer side surface 412 than the groove side surface 415 is. One side of the groove bottom surface 416 is connected to the first outer side surface 411 through one of the groove side surfaces 414, and the other side of the groove bottom surface 416 is connected to the first outer side surface 411 through another groove side surface 415. The groove bottom surface 416 and the two groove side surfaces 414 and 415 jointly form a groove 417.

The abutting portion 42 of the circuit board 40 is located in the groove 417 and connected to the groove bottom surface 416 of the board portion 41, and the two groove side surfaces 414 and 415 of the board portion 41 each maintain a distance from the abutting portion 42. In other words, the abutting portion 42 is not connected to the two groove side surfaces 414 and 415 of the plate portion 41. In addition, the abutting portion 42 of the circuit board 40 includes a second abutting surface 421.

In this embodiment, the board portion 41 of the circuit board 40 includes two buckling grooves 418 separated from each other. The two buckle slots 418 have the same structure, so only one of the buckle slots 418 will be described below. The buckle groove 418 includes a wide-diameter section 4181 and a narrow-diameter section 4182 that are connected, and the width W4 of the wide-diameter section 4181 is greater than the width W5 of the narrow-diameter section 4182. In addition, the width W4 of the wide section 4181 of the buckle groove 418 is greater than the width W1 of the head 23 of the first support 20, and the width W5 of the narrow section 4182 of the buckle groove 418 is greater than the neck of the first support 20 The width W3 of 22 is smaller than the width W1 of the head 23 and the width W2 of the body 21 of the first support 20.

First, for the convenience of description, define the X-axis, Y-axis, and Z-axis that are perpendicular to each other. The X axis is parallel to the normal direction of the groove side surface 414 and the Z axis is perpendicular to the normal direction of the bearing surface 11 of the housing 10.

In this embodiment, the neck 22 of the first support 20 is slidably located in the narrow section 4182 of the buckle groove 418 of the board portion 41 of the circuit board 40, so that the head 23 and the body 21 of the first support 20 The movement of the circuit board 40 in the positive and negative Z axis is restricted, and the neck 22 of the first support 20 restricts the movement of the circuit board 40 in the positive and negative Y axis. In addition, the inclined plate 322 of the vertical portion 32 of the supporting member 30 is clamped in the groove 417 of the board portion 41 of the circuit board 40 and abuts against the two groove sides 414 and 415 of the board portion 41, and the circuit board 40 abuts The second abutting surface 421 of the portion 42 matches the first abutting surface 3221 of the inclined plate 322 of the vertical portion 32, so that the supporting member 30 restricts the movement of the circuit board 40 in the positive and negative X-axis.

Next, how the circuit board 40 is assembled to the first supporting member 20 and the supporting member 30 will be described. First, let the head 23 of the first support 20 pass through the wide-diameter section 4181 of the buckle groove 418 of the circuit board 40, so that the neck 22 of the first support 20 is located in the buckle groove 418 of the circuit board 40. Wide diameter section 4181. Next, move the circuit board 40 so that the neck 22 of the first supporting member 20 is located at the narrow section 4182 of the buckle groove 418 of the circuit board 40, and the groove 417 of the board portion 41 of the circuit board 40 is aligned with the supporting member 30的斜板322。 30的斜板322。 Then, when the stud 52 of the second support member 50 is slightly loosened, the guide groove 311 of the seat portion 31 of the support member 30 is moved relative to the stud 52 of the second support member 50, so that the support member The inclined plate 322 of 30 is located in the groove 417 of the plate portion 41 of the circuit board 40, and the first abutment surface 3221 of the inclined plate 322 of the vertical portion 32 abuts against the second abutment surface of the abutment portion 42 of the circuit board 40 421. Then, the studs 52 of the second supporting member 50 are tightened to complete the assembly of the circuit board 40 on the first supporting member 20 and the supporting member 30.

In this embodiment, the circuit board 40 shown in FIGS. 4 and 5 is, for example, a standard circuit board. Generally speaking, there are some tolerances in the manufacture of circuit boards. For example, the position of the groove of the board portion of the circuit board may have a tolerance, or the thickness of the circuit board may have a tolerance.

As shown in Figures 3 and 4, only when the position of the groove of the board of the circuit board has a tolerance, if the groove side of the groove of the board of the circuit board with tolerance is between the groove side and the second outer side Is greater than the distance d1 between the groove side surface 414 of the groove 417 shown in FIG. 4 and the second outer side surface 412, the circuit board needs to be adjusted to a proper position along the positive X axis from the position shown in FIG. 4, The groove of the plate part is aligned with the inclined plate 322 of the supporting member 30, so that the inclined plate 322 of the supporting member 30 can enter the groove later. Conversely, if the distance between the groove side surface of the groove of the board portion of the circuit board with tolerance and the second outer side surface is smaller than the distance d1 between the groove side surface 414 of the groove 417 and the second outer side surface 412 shown in FIG. 4 , The circuit board needs to be adjusted to the proper position along the negative X axis from the position shown in Figure 4.

It can be seen that since the circuit board is movably disposed on the first supporting member 20, and the circuit board movably abuts the first abutting surface 3221 of the supporting member 30, and the first abutting surface 3221 of the supporting member 30 is an inclined surface Therefore, even if the circuit board has tolerances, the position of the circuit board can be adjusted to keep the circuit board in a proper position and keep against the first abutment surface 3221 of the supporting member 30, so that the circuit board The electrical connector can be more accurately docked with other electronic components, and the probability of damage to the electrical connector is reduced.

As shown in FIG. 5, only when the thickness of the circuit board has a tolerance, if the thickness of the circuit board with tolerance is less than the thickness T1 of the circuit board 40 shown in FIG. 5, the seat portion 31 of the supporting member 30 It needs to be adjusted to the proper position along the negative Y axis from the position shown in FIG. 5 so that the inclined plate 322 of the supporting member 30 can be located in the groove of the circuit board, and the inclined plate 322 first abuts The surface 3221 abuts against the second abutment surface of the abutment portion of the circuit board. On the contrary, if the thickness of the circuit board with tolerance is greater than the thickness T1 of the circuit board shown in FIG. 5, the seat portion 31 of the supporting member 30 needs to be adjusted from the position shown in FIG. 5 along the positive Y axis to a proper position.

In this way, the seat 31 of the supporting member 30 can be slidably arranged relative to the bearing surface 11 of the housing 10, even if the thickness of the circuit board has a tolerance, it can still be ensured that the inclined plate 322 of the supporting member 30 can be locked in. The groove of the circuit board restricts the movement of the circuit board, and the first abutment surface 3221 of the inclined plate 322 can abut the second abutment surface of the abutment portion of the circuit board to provide a resisting effect.

Next, please refer to FIGS. 6 and 7. FIG. 6 is an exploded schematic view of the circuit board fixing assembly disclosed according to the second embodiment of the present invention. Fig. 7 is a schematic cross-sectional view of Fig. 6.

In this embodiment, the circuit board fixing assembly 1a includes a housing 10a, a first supporting member 20a, a supporting member 30a, and a circuit board 40a.

The housing 10a is, for example, a server housing, and the housing 10a includes a bearing surface 11a. The first support 20a includes an assembly cylinder 21a, and the assembly cylinder 21a is fixed to the bearing surface 11a of the housing 10a. The supporting member 30a includes a connecting base portion 31a and a vertical portion 32a. The seat portion 31a is fixed to the bearing surface 11a of the housing 10a. The vertical portion 32a includes a groove 321a, a first abutting surface 322a, and a second abutting surface 323a. The first abutting surface 322a and the second abutting surface 323a are located in the groove 321a and face two different directions, respectively. In detail, the first abutting surface 322a faces away from the bearing surface 11a of the casing 10a, and the second abutting surface 323a faces the bearing surface 11a of the casing 10a. The first abutting surface 322a and the bearing surface 11a of the casing 10a form an acute angle θ3, and the second abutting surface 323a and the bearing surface 11a of the casing 10a form another acute angle θ4, and the angles of the two acute angles θ3 and θ4 are, for example, equal. In other words, both the first abutting surface 322a and the second abutting surface 323a are inclined surfaces, and the absolute values of the slopes of the first abutting surface 322a and the second abutting surface 323a are equal.

The circuit board 40a includes a guiding groove 41a, and the first support 20a further includes a stud 22a. The stud 22a includes a head 221a and a body 222a connected to each other. The outer diameter of the head 221a of the stud 22a is larger than the outer diameter of the body 222a. The body 222a of the stud 22a passes through the guide groove 41a of the circuit board 40a and is locked in the assembly barrel 21a, and the circuit board 40a is sandwiched between the head 221a of the stud 22a and the assembly barrel 21a.

In addition, the circuit board 40a further includes a through hole 42a and an annular wall 43a forming the through hole 42a. The perforation 42a includes, for example, but not limited to, a wide groove and a narrow groove that are connected. The annular wall surface 43a includes two guide slopes 431a. The two inclined guide surfaces 431a face and face the bearing surface 11a of the housing 10a, respectively. The vertical portion 32a of the supporting member 30a passes through the through hole 42a, and the circuit board 40a is located in the groove 321a of the vertical portion 32a, and the two inclined guide surfaces 431a respectively abut the first abutment surface 322a and the second abutment surface 323a . In this way, the circuit board 40a is supported by the first supporting member 20a and abutted by the supporting member 30a.

Next, it will be described how the circuit board 40a is assembled to the first supporting member 20a and the supporting member 30a. First, align the guiding groove 41a of the circuit board 40a with the assembly cylinder 21a of the first supporting member 20a, and allow the vertical portion 32a of the supporting member 30a to pass through the perforation 42a of the circuit board 40a. Next, pass the body 222a of the stud 22a through the guide groove 41a of the circuit board 40a and lock it into the assembly barrel 21a of the first support 20a, but do not lock the stud 22a temporarily at this time. Then, move the circuit board 40a so that the two inclined surfaces 431a of the annular wall surface 43a of the circuit board 40a respectively abut against the first abutment surface 322a and the second abutment surface 323a of the vertical portion 32a, and then the stud 22a is locked .

In this embodiment, the circuit board 40a shown in FIG. 7 is, for example, a standard circuit board. Generally speaking, there are some tolerances in the manufacture of circuit boards. For example, the thickness of the circuit board may have tolerances.

As shown in Figure 7, only for the case where the thickness of the circuit board has a tolerance, if the thickness of the circuit board with the tolerance is less than the thickness T2 of the circuit board shown in Figure 7, then the circuit board needs to be as shown in Figure 7 The position is adjusted toward the bottom of the groove 321a of the vertical portion 32a of the supporting member 30a, so that the two inclined surfaces of the annular wall respectively abut against the first abutting surface 322a and the second abutting surface 323a of the vertical portion 32a. On the contrary, if the thickness of the circuit board with tolerance is greater than the thickness T2 of the circuit board shown in FIG. 7, the circuit board needs to be adjusted from the position shown in FIG. 7 toward the direction away from the bottom of the groove 321a of the vertical portion 32a.

In this embodiment, since the circuit board is movably disposed on the first supporting member 20a, and the circuit board movably abuts the first abutting surface 322a and the second abutting surface 323a of the supporting member 30a, and the supporting member 30a The first abutment surface 322a and the second abutment surface 323a are both inclined surfaces, so even if the thickness of the circuit board has a tolerance, the position of the circuit board can still be adjusted to keep the circuit board against the support member 30a的 first abutment surface 322a and second abutment surface 323a. Thereby, the influence of the thickness tolerance on the height of the electrical connector on the lower surface of the circuit board can be reduced, so that the electrical connector on the circuit board can be more accurately butted with other electronic components, and the probability of damage to the electrical connector is reduced.

In this embodiment, the annular wall surface 43a of the circuit board 40a includes the arrangement of two guide inclined surfaces 431a, which is not intended to limit the present invention. In other embodiments, the annular wall surface of the circuit board may include only one inclined guide surface, or there may be no inclined guide surface.

In this embodiment, the first abutting surface 322a and the second abutting surface 323a of the vertical portion 32a are not limited to be inclined surfaces at the same time. For example, please refer to FIG. 8. FIG. 8 is a schematic cross-sectional view of the circuit board fixing assembly according to the third embodiment of the present invention.

In this embodiment, the circuit board fixing assembly 1b is similar to the circuit fixing assembly 1a of FIG. 6, so only the differences between the two are described below. In this embodiment, only the first abutting surface 322b of the vertical portion 32b of the supporting member 30b is an inclined surface, and the second abutting surface 323b of the vertical portion 32b is parallel to the bearing surface 11b of the housing 10b. In other words, the second abutting surface 323b is a flat surface.

In this embodiment, with the arrangement where the first abutting surface 322a is an inclined surface and the second abutting surface 323a is a flat surface, even if the thickness of the circuit board has a tolerance, the circuit board after the adjusted position is maintained against the first The abutting surface 322a and the second abutting surface 323a completely eliminate the influence of the thickness tolerance on the height of the electrical connector on the surface of the circuit board, thereby further reducing the probability of damage to the electrical connector.

In this embodiment, the first abutting surface 322a is an inclined surface, and the second abutting surface 323a is a flat configuration, which is not intended to limit the present invention. In other embodiments, the first abutting surface may be a flat surface, and the second abutting surface may be an inclined surface. In this way, the influence of the thickness tolerance on the height of the electrical connector on the lower surface of the circuit board can be completely eliminated.

According to the circuit board fixing assembly disclosed in the above embodiment, since the circuit board is movably arranged on the first supporting member, and the circuit board movably abuts against the first abutment surface of the vertical portion, and the first abutment surface of the vertical portion of the supporting member The abutment surface and the bearing surface of the housing have an acute angle, so even if the circuit board has tolerances, the position of the circuit board can still be adjusted to keep the circuit board in a proper position and maintain the first abutment against the vertical portion. Lean against the surface, so that the electrical connector on the circuit board can be more accurately butted with other electronic components, thereby reducing the probability of damage to the electrical connector.

Although the present invention is disclosed in the foregoing preferred embodiments as above, it is not intended to limit the present invention. Anyone familiar with similar art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of patent protection for inventions shall be determined by the scope of patent applications attached to this specification.

1, 1a, 1b: circuit board fixing components 10, 10a, 10b: shell 11, 11a, 11b: bearing surface 20, 20a: the first support 21: Body 22: neck 23: head 30, 30a, 30b: supporting parts 31, 31a: seat body 311: guide slot 32, 32a, 32b: vertical 321: Straight 322: Slope 3221, 322a, 322b: the first abutment surface 321a: Groove 323a, 323b: second abutment surface 40, 40a: circuit board 41: Board Department 411: first outer side 412: second outer side 413: third outer side 414, 415: groove side 416: groove bottom 417: groove 418: Snap Slot 4181: wide section 4182: Narrow section 42: abutment 421: second abutment surface 41a: guide groove 42a: Piercing 431a: Guide slope 43a: annular wall 50: second support 51, 21a: Assembled cylinder 52, 22a: Stud 521, 221a: head 522, 222a: Body 60: Motherboard 70: Stud 80: Screw W1, W2, W3, W4, W5: width θ1: Obtuse angle θ2, θ3, θ4: acute angle T1, T2: thickness

FIG. 1 is a three-dimensional schematic diagram of the circuit board fixing assembly according to the first embodiment of the present invention. Fig. 2 is an exploded schematic diagram of Fig. 1. Fig. 3 is a partially enlarged schematic diagram of the circuit board of Fig. 2. Fig. 4 is a schematic top view of Fig. 1. Fig. 5 is a schematic cross-sectional view of Fig. 1. FIG. 6 is an exploded schematic view of the circuit board fixing assembly according to the second embodiment of the present invention. Fig. 7 is a schematic cross-sectional view of Fig. 6. FIG. 8 is a schematic cross-sectional view of the circuit board fixing assembly according to the third embodiment of the present invention.

1: Circuit board fixing components

10: Shell

11: Bearing surface

20: The first support

30: Supporting parts

40: circuit board

60: Motherboard

Claims (10)

A circuit board fixing assembly, including: A housing including a bearing surface; a first support member arranged on the bearing surface of the housing; a supporting member including a connecting seat body and a vertical portion, the seat body being arranged on the housing The bearing surface, the vertical portion includes a first abutting surface, the first abutting surface and the bearing surface of the housing have an acute angle; and a circuit board, which is movably fixed to the first support, And the circuit board movably abuts the first abutment surface of the vertical portion. The circuit board fixing assembly described in item 1 of the scope of patent application, wherein the vertical portion includes a straight board and a sloping board connected to each other, and one side of the straight board away from the sloping board is connected to the base portion, and the straight board is perpendicular to the seat In the body, the inclined plate and the straight plate form an obtuse angle, and the first abutting surface is located on the inclined plate. As for the circuit board fixing assembly described in item 2 of the scope of patent application, the obtuse angle is greater than or equal to 135 degrees and less than or equal to 165 degrees. For the circuit board fixing assembly described in item 2 of the scope of patent application, the circuit board includes a board portion and an abutting portion, the board portion includes a groove, a groove bottom surface and two groove side surfaces, the groove bottom surface and the The groove side surfaces form the groove, the groove side surfaces are respectively connected to two opposite sides of the groove bottom surface, the abutting portion is located in the groove and connected to the groove bottom surface, and the groove side surfaces each maintain a distance from the abutting portion The abutting portion includes a second abutting surface, the inclined plate is clamped in the groove and abuts against the side surfaces of the grooves, and the first abutting surface matches the second abutting surface. According to the circuit board fixing assembly described in claim 2, wherein the first support includes a body, a neck and a head, the body is fixed to the bearing surface of the housing, and the neck is located Between the body and the head, and connect the body and the head, the width of the head and the width of the body are greater than the width of the neck, the circuit board includes a buckle groove, the buckle The groove includes a wide-diameter section and a narrow-diameter section connected, the width of the wide-diameter section is greater than the width of the narrow-diameter section and the width of the head, the width of the narrow-diameter section is greater than the width of the neck and smaller than the body And the width of the head part and the width of the head part, and the neck part is slidably located in the narrow-diameter section of the buckle groove. The circuit board fixing assembly described in item 2 of the scope of patent application further includes a second support member, the seat body includes a guide groove, and the second support member includes an assembly barrel and a stud, the assembly barrel Fixed to the bearing surface of the housing, the stud includes a head and a body connected to each other, the body of the stud penetrates the guide groove and is locked to the assembly cylinder, and the seat body is located at the Between the head of the stud and the assembly cylinder, and the seat body is slidably disposed on the bearing surface of the housing through the body of the stud and the assembly cylinder. The circuit board fixing assembly described in claim 1, wherein the vertical portion further includes a groove and a second abutting surface, the first abutting surface and the second abutting surface are located in the groove And face two different directions respectively, and the circuit board abuts against the first abutment surface and the second abutment surface. In the circuit board fixing assembly described in item 7 of the scope of patent application, the second abutting surface is parallel to the bearing surface of the casing or forms an acute angle with the bearing surface of the casing. The circuit board fixing assembly described in claim 7 wherein the circuit board includes a through hole and an annular wall forming the through hole, the annular wall includes a guide slope, the vertical portion passes through the through hole, and the circuit board The part of is located in the groove of the vertical part, and the inclined guide surface abuts against the first abutting surface. The circuit board fixing assembly according to claim 7, wherein the circuit board includes a guide groove, the first support includes an assembly cylinder and a stud, and the assembly cylinder is fixed to the bearing of the housing Surface, the stud includes a head and a body connected, the body of the stud penetrates the guide groove of the circuit board and is locked in the assembly cylinder, and the circuit board is clamped in Between the head of the stud and the assembly barrel.

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