WO2018129826A1

WO2018129826A1 - Apparatus for fixing printed circuit board and electronic device

Info

Publication number: WO2018129826A1
Application number: PCT/CN2017/081016
Authority: WO
Inventors: 夏红华; 程良军; 陈登旭; 赵成君
Original assignee: 华为技术有限公司
Priority date: 2017-01-16
Filing date: 2017-04-19
Publication date: 2018-07-19
Also published as: CN109156088B; CN109156088A

Abstract

Disclosed is an apparatus for fixing a printed circuit board, comprising a front limiting part, a rear limiting part, an elastic snap fastener and a placement slot, wherein when the printed circuit board is placed in the placement slot, a notch of the printed circuit board passes through the front limiting part, so that the printed circuit board presses against the elastic snap fastener, and the elastic snap fastener is deformed; and when the printed circuit board moves away from the elastic snap fastener until the elastic snap fastener is reset from deformation, the front limiting part and the rear limiting part press against the printed circuit board, and the elastic snap fastener presses against the printed circuit board.

Description

Fixing device and electronic device for printed circuit board

The present application claims priority to Chinese Patent Application, filed on Jan. 16, 2017, filed Jan. in.

Technical field

The present application relates to the field of communication devices, and in particular, to a fixing device for a printed circuit board and an electronic device.

Background technique

With the rapid development of smart home products in recent years, consumers are increasingly demanding the appearance of products, so the design of router products using built-in printed circuit boards (PCBs) is increasing. However, the built-in printed circuit board has the risk of detachment during the reliability drop test and the logistics transportation process, resulting in poor performance or intermittent failure of the Wireless Fidelity (Wi-Fi) antenna, which greatly affects the product experience.

In the prior art, several common printed circuit board fixing methods are a snap fastening manner, a slide-in fastening manner, a adhesive bonding fixing method, and a screw fixing method. However, the disadvantage of the snap-fastening method is that the amount of the buckle cannot be controlled. If the design of the buckle is small, there will be problems such as the occurrence of the printed circuit board when the drop test is performed. If the design of the buckle is large, Difficulties in the installation and removal of printed circuit boards can affect production efficiency. The disadvantage of the slide-in fixing method is that the printed circuit board needs to be moved a large distance when assembled, and the occupied space is limited by the internal structure of the product during the application process. The disadvantage of the adhesive bonding method is that the adhesive has high cost and is not easy to disassemble, and the maintenance cost is relatively high. The disadvantage of the screw fixing method is that the cost is high, and the screw needs to avoid the antenna, and the arrangement position is limited.

Summary of the invention

The embodiment of the present application provides a fixing device and an electronic device for a printed circuit board. With a relatively simple structural design, the printed circuit board has a relatively good fixing effect in a relatively small space, and the product is guaranteed. Stability and user experience.

In a first aspect, the embodiment of the present application provides a fixing device for a printed circuit board, which may include: a front limiting portion, a rear limiting portion, an elastic snap member, and a placement slot; when the printed circuit board is placed on When the slot is placed, the notch of the printed circuit board can pass through the front limiting portion, so that the printed circuit board presses the elastic latching member and deforms the elastic latching member; One end of the elastic snap member is connected to one edge of the placement slot, and the other end extends below the placement of the printed circuit board in the placement slot, so when the printed circuit board is When the notch passes through the front limiting portion, the elastic snap member can be pressed to deform; when the printed circuit board moves away from the elastic snap member until the elastic snap member recovers, the The front limiting portion and the rear limiting portion abut the printed circuit board, and the elastic snap member abuts the printed circuit board. After the elastic latching member is deformed, the end of the printed circuit board adjacent to the elastic latching member is placed under the front limiting portion, so that the printed circuit board is placed away from the end of the elastic latching member. Below the rear limit portion, and the elastic snap member abuts against the side of the printed circuit board. That is, the user may be required to apply a thrust to the printed circuit board in a direction away from the elastic snap member, so that the pressure generated by the printed circuit board on the elastic snap member disappears, that is, the elastic snap member recovers deformation and elasticity. The snap fastener is just against one end of the printed circuit board. The printed circuit board is also fit in the placement slot, the placement slot and the elastic snap fasteners fix the horizontal direction of the printed circuit board, and the front limit portion and the rear limit portion fix the upper and lower sides of the printed circuit board. direction.

In some embodiments of the present application, since the front limiting portion and the rear limiting portion can fix the printed circuit board in the up and down direction in the fixing device, the placing groove and the elastic snap member can be fixed in the horizontal direction. Printed circuit board, the solution proposed in the embodiment of the present application, with a relatively simple structural design, can fix the printed circuit board in the placement slot in a relatively small space, and is well fixed. effect. Moreover, the limiting portion is pre-designed on the placement groove, so unlike the prior art, the snap-fit is required to fix the printed circuit board, and unlike the prior art, the printed circuit board needs to be slipped. Enter a longer distance into the placement slot and fix it.

With reference to the first aspect of the embodiments of the present application, in a first possible implementation manner of the first aspect of the embodiment of the present application, when the printed circuit board is placed in the placement slot from a vertical direction of the placement slot, The notch of the printed circuit board passes through the front limiting portion. That is to say, the manner in which the printed circuit board is placed in the placement slot may be placed vertically or in other manners, and the implementation manner is not limited.

With reference to the first aspect or the first possible implementation manner of the embodiment of the present application, in a second possible implementation manner of the first aspect of the embodiment of the present application, the front limiting portion and the printed circuit board are notched The shape is consistent. Here, the shape of the printed circuit board may determine the shape of the front limiting portion of the fixing device, or the shape of the front limiting portion of the fixing device may determine the shape of the notch of the printed circuit board, which is not limited. Only the front limit portion and the printed circuit board have the shape of the notch. When the mating is matched, the gap of the printed circuit board can pass through the front limit portion for further subsequent operations.

With reference to the first aspect, the first possible implementation manner, or the second possible implementation manner of the embodiment of the present application, in a third possible implementation manner of the first aspect of the embodiments of the present application, the pre-limitation portion The first limiting portion and the second limiting portion, the rear limiting portion includes a third limiting portion and a fourth limiting portion; the printed circuit board includes a first matching portion of the first limiting portion a notch and a second gap matching the second limiting portion; the first notch passes through the first limiting portion and the second notch when the printed circuit board is placed in the receiving slot Passing through the second limiting portion, such that one end of the printed circuit board presses the elastic latching member and deforms the elastic latching member; when the printed circuit board moves away from the elastic latching member until When the elastic latching member is deformed, the first limiting portion, the second limiting portion, the third limiting portion and the fourth limiting portion abut the printed circuit board, and the elastic fastening member Resist the printed circuit board. That is, when the printed circuit board can be subjected to an external force, the user can apply an external force to the printed circuit board that moves away from the elastic snap member until the elastic snap member recovers, so that the printed circuit board is close to One end of the elastic latching member is disposed under the first limiting portion, and an end of the printed circuit board adjacent to the elastic latching member is disposed under the second limiting portion, and the printed circuit board is further away from the printed circuit board. One end of the elastic snap member is disposed under the third limiting portion and the fourth limiting portion, and the elastic snap member abuts against a side of the printed circuit board.

With reference to the first aspect, the first possible implementation manner, or the second possible implementation manner of the embodiment of the present application, in the fourth possible implementation manner of the first aspect of the embodiment of the present application, the pre-limitation portion The first limiting portion and the second limiting portion, the rear limiting portion includes a third limiting portion; the printed circuit board includes a first notch matching the first limiting portion, and a second gap in which the second limiting portion is matched; when the printed circuit board is placed in the placing slot, the first notch passes through the first limiting portion, and the second notch passes through the second limit a position such that one end of the printed circuit board presses the elastic snap member and deforms the elastic snap member; when the printed circuit board faces away from the elasticity The first limiting portion, the second limiting portion and the third limiting portion abut against the printed circuit board, and the elastic locking member is pressed against the movement of the locking member until the elastic locking member is restored. The printed circuit board. That is, when the printed circuit board can be subjected to an external force, the user can apply an external force to the printed circuit board that moves away from the elastic snap member until the elastic snap member recovers, so that the printed circuit board is close to One end of the elastic latching member is disposed under the first limiting portion, and an end of the printed circuit board adjacent to the elastic latching member is disposed under the second limiting portion, and the printed circuit board is further away from the printed circuit board. One end of the elastic snap member is disposed under the third limiting portion, and the elastic snap member abuts against a side of the printed circuit board.

With reference to the first aspect, the first possible implementation manner, or the second possible implementation manner of the embodiment of the present application, in a fifth possible implementation manner of the first aspect of the embodiments of the present application, the pre-limitation portion The first limiting portion includes a second limiting portion and a third limiting portion; the printed circuit board includes a first notch that coincides with the first limiting portion; when the printing When the circuit board is placed in the receiving slot, the first notch passes through the first limiting portion, so that one end of the printed circuit board presses the elastic latching member and deforms the elastic latching member. The first limiting portion, the second limiting portion and the third limiting portion abut the printing when the printed circuit board moves away from the elastic fastening member until the elastic fastening member recovers and deforms a circuit board, and the elastic snap member abuts the printed circuit board. When the printed circuit board can be subjected to an external force, the user can apply an external force to the printed circuit board that moves away from the elastic snap member until the elastic snap member recovers, so that the printed circuit board is close to the printed circuit board. One end of the elastic latching member is disposed under the first limiting portion, and the end of the printed circuit board away from the elastic latching member is disposed below the second limiting portion and the third limiting portion. And the elastic snap member abuts against the side of the printed circuit board.

In the embodiment of the present application, the third, fourth, and fifth possible implementation manners provide specific implementation manners for the limiting portion, so that the technical solution of the present application is more complete and specific.

With reference to the first aspect, the first possible implementation manner, and the fifth possible implementation manner of the embodiment of the present application, in a sixth possible implementation manner of the first aspect of the embodiments of the present application, the pre-limit The position portion, the rear limit portion and the placement groove are integrally formed. Further, the front limiting portion, the rear limiting portion, the elastic snap member and the placing groove may be integrally formed.

With reference to the first aspect, the first possible implementation manner, and the sixth possible implementation manner of the embodiment of the present application, in the seventh possible implementation manner of the first aspect of the embodiment of the present application, the elastic buckle The material is made of elastic plastic or elastic metal, or other materials that are elastic and not easy to break or not easily broken.

With reference to the first aspect, the first possible implementation manner, and the seventh possible implementation manner of the embodiment of the present application, in the eighth possible implementation manner of the first aspect of the embodiment of the present application, when the printing is performed When the circuit board is placed in the placement slot, the notch of the printed circuit board passes through the front limit portion, so that the printed circuit board presses the elastic snap member and causes the elastic snap member to face The deformation of the bottom of the placement slot. Here, a brief description of what kind of deformation occurs when the elastic snap member is pressed by the printed circuit board makes the technical solution of the present application more specific and specific.

With reference to the first aspect, the first possible implementation manner, and the eighth possible implementation manner of the embodiment of the present application, in the ninth possible implementation manner of the first aspect of the embodiment of the present application, when the printing When the circuit board is placed in the receiving slot, the notch of the printed circuit board passes through the front limiting portion, so that the end of the printed circuit board adjacent to the elastic latching member presses the elastic latching member. And the elastic snap fastener is deformed.

In a second aspect, an embodiment of the present application provides an electronic device, which may include: a printed circuit board and a fixing device for a printed circuit board in any possible implementation manner of the first aspect of the present application; wherein the printed circuit The plate has a notch that coincides with the front stop.

The embodiment of the present application provides a fixing device, which may include a front limiting portion, a rear limiting portion, an elastic snap member and a placement slot; when the printed circuit board is placed in the placement slot And a gap of the printed circuit board passes through the front limiting portion, so that the printed circuit board presses the elastic snap member and deforms the elastic snap member; When the printed circuit board moves away from the elastic snap member until the elastic snap member recovers, the front limit portion and the rear limit portion abut against the printed circuit board, and The elastic snap member abuts the printed circuit board. In the fixing device, the front limiting portion and the rear limiting portion can fix the printed circuit board in the up and down direction, and the placing slot and the elastic latching member can fix the printed circuit board in the horizontal direction. The solution proposed in the present invention uses a relatively simple structural design to fix the printed circuit board in the placement slot in a relatively small space range, thereby achieving a good fixing effect.

DRAWINGS

Figure 1 (a) is a schematic view of the prior art in the snap-fastening manner;

Figure 1 (b) is a schematic view of the prior art in the snap-fastening manner;

2(a) is a schematic view of the prior art slide-in fixing method before assembly;

2(b) is a schematic view showing the assembled state of the slide-in fixing method in the prior art;

FIG. 3(a) is a schematic diagram of a fixing device according to an embodiment of the present application;

FIG. 3(b) is a schematic diagram of a printed circuit board according to an embodiment of the present application;

FIG. 3(c) is a schematic diagram of a printed circuit board assembly process according to an embodiment of the present application;

FIG. 3(d) is a schematic diagram showing deformation of an elastic snap fastener according to an embodiment of the present application;

FIG. 3(e) is a schematic diagram of a recovery deformation of an elastic snap fastener according to an embodiment of the present application; FIG.

FIG. 3(f) is a schematic diagram of a printed circuit board assembled according to an embodiment of the present application;

3(g) is a schematic view showing a vertical placement of a printed circuit board according to an embodiment of the present application;

4(a) is a schematic diagram of a printed circuit board assembled according to an embodiment of the present application;

4(b) is a schematic view of another printed circuit board provided after the assembly of the embodiment of the present application is completed;

4(c) is a schematic view showing another printed circuit board after the assembly of the embodiment of the present application is completed;

4(d) is a schematic diagram showing the relationship between the distance of the printed circuit board moving away from the elastic snap member and the front limiting portion according to an embodiment of the present application;

4(e) is a schematic view of another printed circuit board provided after the assembly of the embodiment of the present application is completed;

FIG. 5( a) is a schematic diagram of still another printed circuit board after the assembly of the embodiment of the present application is completed;

FIG. 5(b) is a schematic diagram of another printed circuit board provided after the assembly of the embodiment of the present application is completed;

FIG. 5(c) is a schematic diagram of still another printed circuit board after the assembly of the embodiment of the present application is completed;

FIG. 5(d) is a schematic diagram of another printed circuit board provided after the assembly of the embodiment of the present application is completed;

FIG. 5(e) is a schematic diagram of still another printed circuit board after the assembly of the embodiment of the present application is completed;

FIG. 5(f) is a schematic diagram of another printed circuit board provided after the assembly of the embodiment of the present application is completed;

FIG. 6( a ) is a schematic diagram of still another printed circuit board assembled according to an embodiment of the present application;

FIG. 6(b) is a schematic diagram of another printed circuit board provided after the assembly of the embodiment of the present application is completed;

FIG. 7( a ) is a schematic diagram showing the relationship between the elastic snap fastener and the printed circuit board after the elastic snap fastener is restored and deformed according to the embodiment of the present application;

7(b) is a schematic cross-sectional view showing the length of deformation of the elastic snap fastener provided by the embodiment of the present application;

FIG. 7(c) is a schematic diagram of the distance provided by the embodiment of the present application for the movement of the printed circuit board to restore the elastic snap member;

FIG. 7( d ) is a schematic diagram of a rear limiting portion in a fixing device according to an embodiment of the present application;

FIG. 7(e) is a schematic diagram of an electronic device and a limit portion thereof according to an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

In the prior art, a common router product usually adopts an internal antenna because of an increase in appearance requirements, but the built-in printed circuit board has a risk of detachment during reliability drop test and logistics transportation, thereby causing malfunction of the Wi-Fi antenna. Or intermittent bad, greatly affecting the product experience.

In the prior art, the common printed circuit board fixing manner is a snap fastening manner, as shown in FIG. 1( a ), which is a schematic diagram of assembling the printed circuit board a to the fixing device b; 1(b) is a schematic view of the snap fastening method. Here, four snap fixing schemes are adopted, and the number and position of the buckles can also be designed according to the specific position and structure of the printed circuit board. However, the disadvantage of the snap-fastening method is that the amount of the buckle cannot be controlled. If the design of the buckle is small, there will be problems such as the release of the printed circuit board during the drop test; if the design of the buckle is large, the production will occur. Line installation and disassembly is difficult, affecting production efficiency.

Another common printed circuit board fixing method is a slide-in fixing method, as shown in FIG. 2(a), which is a schematic diagram of assembling the printed circuit board a to the fixing device b; as shown in FIG. 2(b) Shown as a schematic diagram of the slide-in fixing method. In Figure 2(b), the printed circuit board has not yet fully slid in. When the printed circuit board is completely slid into, the sliding end has a limit to fix the printed circuit board. The disadvantage of the slide-in fixing method is that the printed circuit board needs to be moved a large distance during assembly, and the occupied space is large, which is limited by the internal structure of the product during the application process.

The embodiment of the present application discloses a buckle fixing scheme. Under the premise of ensuring reliability, the hand feeling of assembly and disassembly of the printed circuit board and the stroke space required for assembly are taken into consideration, which is a high reliability and low cost. , small space, easy to disassemble printed circuit board fixing scheme.

As shown in FIG. 3( a ), the fixing device 10 may include a front limiting portion 101 , a rear limiting portion 102 , an elastic latching member 103 , and a placing slot 104 . It should be understood that the limiting portion herein may also be referred to as a limiting station. As shown in FIG. 3(b), the printed circuit board 20 includes a notch 201 that coincides with the front limiting portion 101.

As shown in FIG. 3(c), when the printed circuit board 20 is placed in the placement slot 104, the notch 201 of the printed circuit board 20 passes through the front limiting portion 101, as shown in FIG. 3(d). The printed circuit board 20 is pressed against the elastic latching member 103, and the elastic latching member 103 is deformed. It should be noted that one end of the elastic latching member 103 can be connected to one edge of the placing slot 104, and the other end can be The printed circuit board 20 extends below the printed circuit board 20 when placed in the placement slot 104. Therefore, when the notch 201 of the printed circuit board 20 passes through the front limiting portion 101, the elastic card can be The fastener 103 generates pressure.

As shown in FIG. 3(e), when the printed circuit board 20 is moved away from the elastic snap member 103 until the elastic snap member 103 recovers, it should be understood that the printed circuit board 20 can be oriented under the action of an external force. Moving away from the elastic latching member 103 until the elastic latching member 103 recovers, at this time, the printed circuit board 20 is located between the front limiting portion 101 and the rear limiting portion 102, and the middle of the placing slot 104, the front limit The side of the bit portion 101 and the rear stop portion 102 adjacent to the printed circuit board 20 may be on the same plane. As shown in FIG. 3(f), the front limiting portion 101 and the rear limiting portion 102 abut against the printed circuit board 20, and the elastic latching member 103 abuts against the printed circuit board 20. That is, one end of the notch 201 of the printed circuit board 20 near the elastic latching member 103 is below the front limiting portion 101, so that the end of the printed circuit board 20 away from the elastic latching member 103 is in the rear limiting portion. Below the 102, and the elastic snap member 103 is pressed against the printed circuit board 20. It can be understood that the user applies a pushing force to the printed circuit board 20 in a direction away from the elastic latching member 103, so that the pressure generated on the elastic latching member 103 disappears, that is, the elastic latching member 103 recovers and deforms, and the elastic latching member 103 is elastically deformed. The end of the printed circuit board 20 is pressed against the printed circuit board 20, and the printed circuit board 20 is also fitted in the placement groove 104.

It should be noted that, in the schematic view shown in FIG. 3(f), when the fixing device 10 is viewed from the top, the front limiting portion 101 and the rear limiting portion 102 are seen by the user with the placing groove 104 as a reference surface. The front side of the front limiting portion 101 and the rear limiting portion 102 is the front limiting portion 101, and the opposite side of the front limiting portion 101 and the rear limiting portion 102 is the front limiting portion. 101 and the lower portion of the rear limit portion 102. The front limiting portion 101 and the rear limiting portion 102 can fix the printed circuit board 20 in the vertical direction, and the placing groove 104 and the elastic locking member 103 can fix the printed circuit board 20 in the horizontal direction, thereby The printed circuit board 20 is fixed to the fixture 10.

Because in the fixing device 10, the front limiting portion 101 and the rear limiting portion 102 can fix the printed circuit board in the up and down direction, and the placing groove 104 and the elastic snap member 103 can fix the printed circuit board in the horizontal direction. 20, the limiting portion is pre-designed on the placing groove 104, so that the printed circuit board 20 can be fixed in the placing groove 104 in a relatively small space by using a relatively simple structural design. Good fixing effect.

Optionally, the front limiting portion 101 conforms to the shape of the notch 201 of the printed circuit board 20. When the current limiting portion 101 and the notch 201 of the printed circuit board 20 are shaped and matched, the notch 201 of the printed circuit board 20 can pass through the front limiting portion 101, and then slide the printed circuit board 20 into the housing. The groove 104 is fixed inside. Here, the notch 201 of the printed circuit board 20 may determine the shape of the front limiting portion 101 of the fixing device 10, or the shape of the front limiting portion 101 of the fixing device 10 may determine the shape of the notch 201 of the printed circuit board 20. The specific is not limited. It can be understood that the shape of the notch 201 of the printed circuit board 20 is equal to the size of the front limiting portion 101, and the size of the notch 201 of the printed circuit board 20 is matched and matched. The size of the notch 201 of the printed circuit board 20 is slightly larger than the size of the front limiting portion 101.

Alternatively, when the printed circuit board 20 is placed in the placement slot 104 from the vertical direction of the placement slot 104, the notch 201 of the printed circuit board 20 passes through the front limiting portion 101. As shown in FIG. 3(g), the printed circuit board 20 is placed in the placement slot 104, and can be placed in the placement slot 104 from the vertical direction. However, in practical applications, the printed circuit board is not limited to being printed from other directions. 20 is placed in the placement slot 104.

It should be noted that, in practical applications, the shape of the printed circuit board 20 is not limited to the shape shown in FIG. 3(b), and other shapes such as a circle, a triangle, a square, etc. may be printed, or printed. The notch 201 on the circuit board 20 is not limited to the case shown in FIG. 3(b), and may be determined according to actual needs, and is also used in the embodiment of the present application. The technical solution provided is also applicable to other printed circuit boards, such as printed antenna boards.

It should be noted that the number of the foregoing front limiting portion 101 and the rear limiting portion 102 is not limited, and the following can be explained by several examples:

(1) Optionally, the front limiting portion 101 includes a first limiting portion 1011 and a second limiting portion 1012, and the rear limiting portion 102 includes a third limiting portion 1021 and a fourth limiting portion 1022; The circuit board 20 includes a first notch 2011 that coincides with the first limiting portion 1011 and a second notch 2012 that coincides with the second limiting portion 1012.

When the printed circuit board 20 is placed in the placement slot 104, the first notch 2011 passes through the first limiting portion 1011 and the second notch 2012 through the second limiting portion 1012, so that one end of the printed circuit board 20 abuts The elastic latching member 103 is pressed and deformed by the elastic latching member 103; when the printed circuit board 20 is moved away from the elastic latching member 103 until the elastic latching member 103 is restored to the deformation, the first limiting portion 1011 and the second portion The limiting portion 1012 , the third limiting portion 1021 and the fourth limiting portion 1022 are pressed against the printed circuit board 20 , and the elastic snap member 103 is pressed against the printed circuit board 20 . That is, one end of the printed circuit board 20 near the elastic latching member 103 is placed under the first limiting portion 1011, and the end of the printed circuit board 20 near the elastic latching member 103 is placed below the second limiting portion 1012. The end of the printed circuit board 20 away from the elastic latching member 103 is also placed under the third limiting portion 1021 and the fourth limiting portion 1022, and the elastic latching member 103 is pressed against the printed circuit board 20.

It should be noted that, as shown in the schematic diagrams of FIGS. 4( a ), 4 ( b ), and 4 ( c ), the distance L1 with respect to the movement of the printed circuit board 20 away from the elastic snap member 103 may be greater than 0 or less than or equal to the front. The length L2 of the limiting portion 101 can be specifically referred to FIG. 4(d). It should be understood that FIG. 4(e) is an example based on FIG. 4(a), and is also applicable to 4(b). 4(c), the front limit portion 101 is caused to abut against the printed circuit board 20.

As shown in Fig. 4(e), a schematic view of the printed circuit board after assembly on the fixture is completed. In FIG. 4(e), when the printed circuit board 20 is subjected to an external force, the distance moved away from the elastic snap member 103 is greater than 0 and smaller than the length of the printed circuit board 20.

(2) Optionally, the front limiting portion 101 includes a first limiting portion 1011 and a second limiting portion 1012, and the rear limiting portion 102 includes a third limiting portion 1021; the printed circuit board 20 includes The first notch 2011 that coincides with the first limiting portion 1011 and the second notch 2011 that coincides with the second limiting portion 1012.

When the printed circuit board 20 is placed in the placement slot 104, the first notch 2011 passes through the first limiting portion 1011 and the second notch 2012 through the second limiting portion 1012, so that one end of the printed circuit board 20 abuts The elastic latching member 103 is pressed and deformed by the elastic latching member 103; when the printed circuit board 20 is moved away from the elastic latching member 103 until the elastic latching member 103 is restored to the deformation, the first limiting portion 1011 and the second portion The limiting portion 1012 and the third limiting portion 1021 are pressed against the printed circuit board 20, and the elastic latching member 103 is pressed against the printed circuit board 20. That is, one end of the printed circuit board 20 near the elastic latching member 103 is placed under the first limiting portion 1011, and the end of the printed circuit board 20 near the elastic latching member 103 is placed below the second limiting portion 1012. The end of the printed circuit board 20 away from the elastic latching member 103 is also placed under the third limiting portion 1021, and the elastic latching member 103 is pressed against the printed circuit board 20.

It should be noted that, as shown in FIGS. 5(a), 5(b), 5(c), 5(d), and 5(e), the printed circuit board 20 is moved away from the elastic snap member 103. The distance L1 may be greater than 0 and less than or equal to the length L2 of the front limiting portion 101. Referring to the schematic diagram shown in FIG. 4(d) above, the front limiting portion 101 is pressed against the printed circuit board 20.

As shown in Fig. 5(f), a schematic view of the printed circuit board after assembly on the fixture is completed. In FIG. 5(f), when the printed circuit board 20 is subjected to an external force, the distance moved away from the elastic snap member 103 is greater than 0 and Less than the length of the printed circuit board 20.

(3) Optionally, the front limiting portion 101 includes a first limiting portion 1011, and the rear limiting portion 102 includes a second limiting portion 1021 and a third limiting portion 1022; the printed circuit board 20 includes The first notch 2011 is matched by the first limiting portion 1011.

When the printed circuit board 20 is placed in the placement slot 104, the first notch 2011 passes through the first limiting portion 1011, so that one end of the printed circuit board 20 presses against the elastic fastening member 103, and the elastic fastening member is caused. When the printed circuit board 20 is moved away from the elastic latching member 103 until the elastic latching member 103 is restored, the first limiting portion 1011, the second limiting portion 1021, and the third limiting portion 1022 are resisted. The circuit board 20 is printed, and the elastic snap member 103 is pressed against the printed circuit board 20. That is, one end of the printed circuit board 20 near the elastic latching member 103 is placed under the first limiting portion 1011, and the end of the printed circuit board 20 away from the elastic latching member 103 is placed in the second limiting portion 1021 and Below the third limiting portion 1022, the elastic latching member 103 abuts against the printed circuit board 20.

It should be noted that, as shown in the schematic diagrams of FIGS. 6( a ) and 6 ( b ), the distance L1 of the printed circuit board 20 moving away from the elastic latching member 103 may be greater than 0 and less than or equal to the front limiting portion 101 . For the length L2, reference may be made to the schematic diagram shown in FIG. 4(d) above, so that the front limiting portion 101 abuts against the printed circuit board 20.

Optionally, the front limiting portion 101, the rear limiting portion 102 and the placing groove 104 are integrally formed.

Optionally, the elastic snap member 103 is made of elastic plastic or elastic metal or other material that is elastic and is not easily broken or broken.

Optionally, when the printed circuit board 20 is placed in the placing slot 104, the notch of the printed circuit board 20 passes through the front limiting portion 101, so that the printed circuit board 20 presses the elastic latching member 103, and The elastic snap member 103 is deformed toward the bottom of the placement groove 104.

Optionally, when the printed circuit board 20 is placed in the placing slot 104, the notch 201 of the printed circuit board 20 passes through the front limiting portion 101, so that the printed circuit board 20 is adjacent to the elastic latching member 103. One end presses the elastic snap member 103 and deforms the elastic snap member 103.

Optionally, when the elastic latching member 103 is deformed, as shown in FIG. 7( a ), a point on the lower surface of the printed circuit board 20 is taken as point A1, and a point on the upper surface of the printed circuit board 20 is A2. Point, and one point of the side of the extending portion of the elastic latching member 103 away from the front limiting portion 101 is B1 point, and one point of the side close to the front limiting portion 101 is B2 point to be elastic The fastener member 103 is abutted against the side of the printed circuit board 20, wherein A2>A1, B2>B1, the distance between the A1 point and the A2 point is represented by A1A2, and the distance between the B1 point and the B2 point is used. B1B2 indicates that there can be two cases, as shown below:

(1) A1A2<B1B2, then, there may be three cases, 1B1<A1<B2, 2B1<A2<B2, 3A2<B2 and B1<A1;

(2) A1A2 ≥ B1B2, then, there may be three cases, 1B1 ≤ A1 ≤ B2, 2B1 ≤ A2 ≤ B2, 3A2 ≥ B2 and B1 ≥ A1.

Optionally, as shown in FIG. 7(b), the length m of the portion of the elastic snap member 103 that is deformed may be equal to the printed circuit board 20 as shown in FIG. 7(c) facing away from the elastic snap member 103 until elastic. The catching member 103 restores the moving distance n of the deformation.

That is, when the printed circuit board 20 is placed in the placing slot 104, the notch 201 of the printed circuit board 20 passes through the front limiting portion 101, so that the printed circuit board 20 is pressed against the elastic latching member 103, and then printed. The portion of the elastic buckle that the circuit board 20 is pressed against The length of the piece 103 may be equal to the moving distance at which the printed circuit board 20 moves such that the elastic snap member 103 returns to deformation.

It should be noted that, in the schematic diagrams shown in FIGS. 4(a), 4(b), 4(c), 4(e), 6(a), and 6(b) above, the rear limiting portion 102 is The setting may also be a structure as shown in Fig. 7(d).

FIG. 7(e) is a schematic diagram of an electronic device and a limiting portion thereof provided in the embodiment of the present application, including: a printed circuit board 20 and the fixing device 10 of the printed circuit board of any of the above; The printed circuit board 20 has a notch that coincides with the front limiting portion 101. In Fig. 7(e), a and b are front limit portions, and c and d are rear limit portions.

The structural solution provided by the embodiment of the present application is a high reliability, low cost, small space printed circuit board fixing scheme, and uses a relatively simple structural design to play a printed circuit board in a relatively small space range. Better fixed effect, and there will be little detachment in the more demanding environment, ensuring product stability and product user experience.

The terms "first", "second", "third", "fourth", etc. (if present) in the specification and claims of the present application and the above figures are used to distinguish similar objects without having to use To describe a specific order or order. It is to be understood that the data so used may be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than what is illustrated or described herein. In addition, the terms "comprises" and "comprises" and "the" and "the" are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to Those steps or units may include other steps or units not explicitly listed or inherent to such processes, methods, products or devices.

Claims

A fixing device for a printed circuit board, comprising: a front limiting portion, a rear limiting portion, an elastic snap member and a placing groove;

When the printed circuit board is placed in the placement slot, the notch of the printed circuit board passes through the front limiting portion, so that the printed circuit board presses the elastic fastener And deforming the elastic snap member;

The front limiting portion and the rear limiting portion abut against the printed circuit board when the printed circuit board moves away from the elastic snap member until the elastic snap member returns to deformation. And the elastic snap member is against the printed circuit board.
The fixing device for a printed circuit board according to claim 1, wherein the front limiting portion conforms to a notch shape of the printed circuit board.
The fixing device for a printed circuit board according to claim 1 or 2, wherein the printed circuit board is placed in the placement groove in a vertical direction of the placement groove A notch of the plate passes through the front limit portion.
The fixing device for a printed circuit board according to any one of claims 1 to 3, wherein the front limiting portion includes a first limiting portion and a second limiting portion, and the rear limiting portion The third limiting portion and the fourth limiting portion are included; the printed circuit board includes a first notch that matches the first limiting portion, and a second that matches the second limiting portion gap;

When the printed circuit board is placed in the placement slot, the first notch passes through the first limiting portion, and the second notch passes through the second limiting portion, such that the One end of the printed circuit board presses the elastic snap member and deforms the elastic snap member;

The first limiting portion, the second limiting portion, and the third limiting portion are configured when the printed circuit board moves away from the elastic snap member until the elastic snap member recovers and deforms And the fourth limiting portion abuts the printed circuit board, and the elastic snap member abuts the printed circuit board.
The fixing device for a printed circuit board according to any one of claims 1 to 3, wherein the front limiting portion includes a first limiting portion and a second limiting portion, and the rear limiting portion a third limiting portion is included; the printed circuit board includes a first notch that matches the first limiting portion, and a second notch that coincides with the second limiting portion;

When the printed circuit board is placed in the placement slot, the first notch passes through the first limiting portion, and the second notch passes through the second limiting portion, such that the One end of the printed circuit board presses the elastic snap member and deforms the elastic snap member;

The first limiting portion, the second limiting portion, and the third limiting portion when the printed circuit board moves away from the elastic snap member until the elastic snap member recovers and deforms Abut against the printed circuit board, and the elastic snap member abuts the printed circuit board.
The fixing device for a printed circuit board according to any one of claims 1 to 3, wherein the front limiting portion includes a first limiting portion, and the rear limiting portion includes a second limiting portion. And a third limiting portion; the printed circuit board includes a first notch that coincides with the first limiting portion;

When the printed circuit board is placed in the placement slot, the first notch passes through the first limiting portion such that one end of the printed circuit board presses against the elastic snap member, And causing the elastic snap member to be deformed;

The first limiting portion, the second limiting portion, and the third limiting portion when the printed circuit board moves away from the elastic snap member until the elastic snap member recovers and deforms Abut against the printed circuit board, and the elastic snap member abuts the printed circuit board.
The fixing device for a printed circuit board according to any one of claims 1 to 6, wherein the front limiting portion, the rear limiting portion and the placing groove are integrally formed.
The fixing device for a printed circuit board according to any one of claims 1 to 7, wherein the elastic snap member is made of elastic plastic or elastic metal.
The fixing device for a printed circuit board according to any one of claims 1 to 8, wherein when the printed circuit board is placed in the placement groove, the notch of the printed circuit board passes through The front limiting portion causes the printed circuit board to press against the elastic snap member and cause the elastic snap member to deform toward the bottom of the placement slot.
A fixing device for a printed circuit board according to any one of claims 1 to 9, wherein

When the printed circuit board is placed in the placement slot, the notch of the printed circuit board passes through the front limiting portion, so that the printed circuit board is adjacent to the elastic fastener One end presses the elastic snap member and deforms the elastic snap member.
An electronic device, comprising: a printed circuit board and the fixing device of the printed circuit board according to any one of claims 1 to 10;

Wherein, the printed circuit board has a notch that coincides with the front limiting portion.