CN120428819A - Electronic snap-fit device - Google Patents

Abstract

An electronic snap-in device comprising: the base is provided with a stop part and a guide part, the movable clamping part is provided with an elastic arm corresponding to the stop part and a guided part combined with the guide part, when the movable clamping part is combined on the base, the elastic action between the stop part and the elastic arm is utilized to cooperate with the guiding action between the guide part and the guided part, so that the movable clamping part can elastically displace between a clamping position and a releasing position relative to a position for arranging an electronic card on the base, and the electronic card can be conveniently and firmly clamped and released on the base to form the electronic card fixing device with simple structure and convenient assembly.

Description

Electronic fastener fixing device

Technical Field

The present invention relates to an electronic card fastening device, and more particularly to an electronic card (such as a solid state disk) fastening structure with simple structure, convenient assembly and low production cost.

Background

The standard of the traditional Solid state disk (Solid STATE DRIVE, SSD) is an mSATA standard, but is limited by the quantity of flash memories which can be distributed on a circuit board (PCB), so that the whole capacity of the Solid state disk is limited, and accordingly, the newer NGFF (Next Generation Form Factor; also called M.2) standard applicable to the Solid state disk is generated, and compared with the traditional mSATA standard, the M.2 standard can be used for respectively distributing flash memory chips on two sides of the circuit board, and has the advantages of smaller volume and higher capacity and is beneficial to reducing the cost.

The solid state disk of the general m.2 standard has various length specifications for selection, and is designed on the computer motherboard to share the solid state disk of various length specifications. In order to fix solid state disks with different length specifications, at present, screws and studs are mostly adopted to fix the solid state disk with M.2 standard on a computer motherboard, however, the combination means of the screws and the studs are not convenient in assembly and disassembly, and the studs are buried on the computer motherboard for screw locking, so that the cost is increased.

The invention of taiwan patent publication No. I568334 discloses an assembly buckle, which comprises a bearing part, a pivoting part, a protruding part and a buckling part, wherein the bearing part is provided with a bearing surface and a back surface which are opposite to each other. The pin joint part and the bulge are respectively protruded out of the back surface of the bearing part and the bearing surface of the bearing part and extend along the axial direction of the pin joint part. The buckling part protrudes out of one side of the protruding part and extends along the radial direction of the pivoting part, so that a buckling groove is formed between the buckling part and the bearing part, and a release notch which is not covered by the buckling part is arranged beside the buckling groove.

When the structure is used, the pin joint part of the assembly buckle can be inserted into the corresponding assembly hole on the computer motherboard according to the specification and the size of the solid state disk, and a tool (such as a straight screwdriver) stretches into the preset operation groove on the bulge part to rotate the bulge part of the assembly buckle, so that the buckling groove and the release notch positioned on two opposite sides can respectively face the solid state disk to form different states such as fixing or releasing.

The utility model discloses a tool-free grounding type quick-fastening device disclosed in the patent publication No. CN 209390455U, which comprises a male fastener and a female fastener, wherein the female fastener is provided with a main body, the main body is provided with an interference sleeve which can be inserted into a fixing hole on a circuit board, the top of the interference sleeve is concavely provided with a clamping hole, a metal grounding fastener is combined on the periphery of the clamping hole, the male fastener is provided with a pressing part, the center of the pressing part is convexly provided with a plug, and at least one bendable flexible connecting belt is arranged between the pressing part and the main body.

When the device is used, the plug of the male buckle is inserted into the clamping hole of the female buckle, the pressing part can be pressed above the peripheral side of the notch at the edge of the M.2 card (solid state disk) to form grounding and positioning, and the device has complex integral structure and difficult processing, and is not suitable for being applied to low-unit-price components.

In addition, in the chinese patent publication CN 109659727a, a combination of fastening devices is disclosed, where the fastening device has a set of main body parts disposed on the circuit board, at least one fastening part is accommodated in the main body parts, a fastening part is concavely disposed at one side of the fastening part, and a spring sheet or an elastic part capable of abutting against the fastening part is disposed in the main body part, so that the fastening part can maintain a elasticity of stretching and tilting.

In practical application, the edge of the electronic card (solid state disk) can be directly pressed down from the upper part of the clamping piece, so that the clamping piece can generate compression and deflection elastic action, and the clamping part is clamped on the periphery of the notch of the edge of the electronic card (solid state disk) to form easy-to-operate and stable positioning.

In view of the above drawbacks of the conventional clip positioning device for electronic cards (solid state disk), the present inventors have studied and improved the drawbacks, and finally have the present invention.

Disclosure of Invention

The invention mainly aims to provide an electronic buckle fixing device which comprises a base body arranged on a mainboard and a movable clamping piece combined with the base body, wherein a blocking part, an elastic arm corresponding to the blocking part, a guiding part and a guided part corresponding to the guiding part are arranged between the base body and the movable clamping piece, the guided part can be combined with the guiding part, so that the movable clamping piece can move elastically between a clamping position and a releasing position relative to a position for arranging an electronic card on the base body, when the movable clamping piece moves towards the releasing position from the initial clamping position under the action of external force, the movable clamping piece can move out of the position for clamping the electronic card, the elastic arm generates elastic deformation under the action of the blocking part and accumulates elastic restoring force, and when the external force acting on the movable clamping piece is released, the elastic arm can move back to the clamping position for clamping the electronic card from the releasing position under the action of the elastic restoring force, so that the electronic buckle fixing device with a simple structure is formed.

Another objective of the present invention is to provide an electronic card locking device, wherein a guiding inclined plane is disposed on a side surface of the blocking portion facing the elastic arm, such that the elastic arm is blocked to generate the elastic restoring force, and meanwhile, the guided portion generates a force perpendicular to a displacement path of the guiding portion due to the guiding inclined plane, so as to eliminate a combined gap between the guiding portion and the guided portion, and prevent a loosening between the base and the movable clamping member from affecting a clamping effect of the electronic card.

The electronic fastener fixing device comprises a base body arranged on a motherboard and a movable clamping piece combined with the base body, wherein a blocking part, an elastic arm corresponding to the blocking part, a guiding part and a guided part corresponding to the guiding part are arranged between the base body and the movable clamping piece, the guided part can be combined with the guiding part, the movable clamping piece can perform elastic displacement between a clamping position and a releasing position relative to a position for arranging an electronic card on the base body, the elastic arm is arranged on one of the base body and the movable clamping piece, the blocking part is arranged on the other one of the base body and the movable clamping piece, when the movable clamping piece moves towards the releasing position from the initial clamping position under the action of external force, the movable clamping piece can move out of the position of the electronic card, the elastic arm generates elastic deformation and accumulates elastic restoring force under the action of the blocking part, and when the movable clamping piece acts on the movable clamping piece, the elastic arm can restore to the elastic restoring position by the action of the elastic restoring force when the movable clamping piece releases the elastic arm.

According to the above structure, a guiding inclined plane is disposed on a side surface of the stopping portion facing the elastic arm.

According to the structure, the movable clamping piece is provided with an accommodating space capable of accommodating the elastic arm and the blocking part, the guided part is a long hollow guide groove arranged at the side of the accommodating space and extends along the elastic displacement direction of the movable clamping piece relative to the base body, the guide part is an elastic piece arranged at the side of the base body and corresponding to the long hollow guide groove, the elastic piece is provided with a hook part protruding into the long hollow guide groove, and the long hollow guide groove can exert displacement guiding and displacement stroke limiting effects on the hook part, so that the movable clamping piece can be combined on the base body and form guiding and limiting of an elastic displacement path.

According to the structure, the base body is provided with an accommodating space capable of accommodating the blocking part and the elastic arm, the guide part is provided with a long side extension part arranged at the side of the accommodating space, the side extension part extends along the elastic displacement direction of the movable clamping piece relative to the base body, the middle section of the side extension part is provided with a vertically protruding extension part, the guided part is provided with a transverse guide groove arranged at the side of the movable clamping piece and corresponding to the side extension part, the transverse guide groove accommodates the side extension part, the transverse guide groove is provided with a vertically extending lower notch, the lower notch accommodates the protruding extension part, the width of the lower notch is larger than that of the protruding extension part, and the guide of displacement formed by the transverse guide groove to the side extension part is matched with the lower notch to limit the displacement stroke of the protruding extension part, so that the movable clamping piece can be normally combined on the base body, and the guide and the limit of an elastic displacement path are formed.

According to the structure, two ends of the electronic card are respectively provided with a clamping end and an electric connection end, the electric connection end can be electrically connected with a terminal seat arranged on the motherboard, a positioning notch is arranged at the edge of the clamping end, a positioning convex part corresponding to the positioning notch is arranged in the direction of the movable clamping piece towards the electronic card, a pressing part protruding towards the electronic card is arranged above the positioning convex part, and an inclined plane is arranged in the direction of the pressing part towards the positioning notch of the electronic card.

Drawings

So that the manner in which the above recited objects, features and features of the present invention can be understood in detail, a more particular description of the invention, briefly summarized below, may be had by reference to the appended drawings.

FIG. 1 is an exploded perspective view of a first embodiment of the present invention.

FIG. 2 is a combined appearance of the first embodiment of the present invention.

FIG. 3 is a cross-sectional view of FIG. 2 taken along the direction A-A.

Fig. 4 is a schematic diagram (one) of the first embodiment of the present invention, which discloses a state of the electronic card before being locked by the movable locking member.

FIG. 5 is a schematic diagram (II) of the first embodiment of the present invention, which shows the moving state of the movable clamping member when the electronic card is assembled.

Fig. 6 is a schematic diagram (III) of the first embodiment of the present invention, which discloses a state that the electronic card is locked and positioned by the movable locking member.

Fig. 7 is a schematic diagram (fourth) of the first embodiment of the present invention, which discloses a state that the movable clamping piece releases the positioning of the electronic clamping piece.

FIG. 8 is an exploded perspective view of a second embodiment of the present invention.

FIG. 9 is a combined appearance of a second embodiment of the present invention.

FIG. 10 is a front plan view of FIG. 9 taken along the direction of movement of the movable clamp.

FIG. 11 is a schematic diagram (I) of a second embodiment of the present invention, which discloses a state of the electronic card before being locked by the movable locking member.

FIG. 12 is a schematic diagram (II) of a second embodiment of the present invention, which shows a state of moving against the movable clamping member when the electronic card is assembled.

FIG. 13 is a schematic diagram (III) of a second embodiment of the present invention, which discloses a state that the electronic card is locked and positioned by the movable locking member.

Fig. 14 is a schematic diagram (fourth) of an application situation of the second embodiment of the present invention, which discloses a state that the movable clamping piece releases the positioning of the electronic clamping piece.

The reference symbols in the drawings indicate:

1,10, seat body

11 Stop part

111 Guiding inclined plane

12,13 Guide portions

121 Elastic sheet

122 Hook portion

131 Protruding part

132 Side extension

14,24 Containing space

2,20, Movable clamping piece

200 Clamping position

201 Release position

21 Elastic arm

22,25 Guided portion

220-Long hollow guide groove

23 Positioning convex part

231 Press section

232 Inclined plane

251 Lower notch

252 Transverse guide groove

3 Electronic card

30 Motherboard

31 Clip end

310 Positioning notch

32 Electrical connection terminal

40 Terminal base

Detailed Description

Referring to fig. 1 to 7, the structure of the first embodiment of the present invention includes a base 1 and a movable clamping member 2, wherein the base 1 can be fixedly assembled on a motherboard 30 by bonding, welding or other component connection for installing the side of the electronic card 3 (which can be a solid state disk), and a stop portion 11 and a guiding portion 12 are provided on the base 1.

The movable clamping member 2 is assembled on the base 1, the movable clamping member 2 has a guided portion 22, the guided portion 22 can be assembled with the guiding portion 12, and the movable clamping member 2 can form an elastic displacement path between a clamping position 200 (shown in fig. 4 and 6) and a releasing position 201 (shown in fig. 7) on the base 1 relative to the electronic card 3, the movable clamping member 2 is provided with an elastic arm 21 corresponding to the blocking portion 11 towards the base 1, the blocking portion 11 is located on the displacement path of the elastic arm 21 along with the elastic displacement of the movable clamping member 2, and a guiding inclined plane 111 is provided on a side surface of the blocking portion 11 towards the elastic arm 21.

In this embodiment, when the movable fastening member 2 is assembled on the base 1, a receiving space 24 capable of receiving the elastic arm 21 and the stop portion 11 is formed between the movable fastening member 2 and the base 1, the guided portion 22 is a hollow-out guide slot 220 disposed at a middle section of two sides of the receiving space 24, and the hollow-out guide slot 220 extends along the elastic displacement direction of the movable fastening member 2 relative to the base 1.

The guiding portion 12 may be an elastic piece 121 disposed beside the base 1 and corresponding to the elongated hollow guiding slot 220, a hook portion 122 protruding into the elongated hollow guiding slot 220 is disposed on the elastic piece 121, and the elongated hollow guiding slot 220 is utilized to guide the hook portion 122 in a displacement direction and limit a moving stroke, so that the moving fastening member 2 is normally assembled on the base 1 and forms a guiding and limiting of an elastic displacement path.

In the above structure, a positioning notch 310 is disposed at an edge of a fastening end 31 of the electronic card 3, a positioning protrusion 23 corresponding to the positioning notch 310 is disposed in a direction of the movable fastening member 2 toward the electronic card 3, a pressing portion 231 protruding toward the electronic card 3 is disposed above the positioning protrusion 23, and an inclined surface 232 is disposed in a direction of the pressing portion 231 toward the electronic card 3 (toward the positioning notch 310 of the electronic card 3).

In practical application, if the electronic card 3 is to be assembled, the electrical connection end 32 of the electronic card 3 with pins is inserted and combined into the terminal seat 40, at this time, the fastening end 31 of the electronic card 3 with the positioning notch 310 keeps an elastically tilted state, the movable fastening member 2 is located at the initial fastening position 200 (as shown in fig. 4) where the electronic card 3 is not fastened yet, the user can directly press the electronic card 3 to make the fastening end 31 gradually touch the inclined surface 232 to slide downwards, and meanwhile, the inclined surface 232 is utilized to link the movable fastening member 2 to displace away from the electronic card 3 towards the releasing position 201, so that the positioning protrusion 23 and the pressing portion 231 of the movable fastening member 2 displace to a position close to the fastening end 31 of the electronic card 3 or the end edge of the positioning notch 310 (as shown in fig. 5).

In the gradual displacement process, the elastic arm 21 is gradually pushed by the guiding inclined plane 111 of the blocking portion 11 to generate elastic bending, and the elastic restoring force capable of restoring to the initial blocking position 200 is accumulated, and the elongated hollow guide slot 220 of the guided portion 22 is limited to be displaced along the allowed direction of the hook portion 122 of the guiding portion 12, that is, only the displacement along the displacement path between the blocking position 200 and the releasing position 201 relative to the electronic card 3 can be performed, and the lateral leaning action between the elongated hollow guide slot 220 and the hook portion 122 can be further provided by using the vertical elastic force generated by the elastic arm 21 blocked by the guiding inclined plane 111 of the blocking portion 11, so as to effectively eliminate the loosening phenomenon therebetween.

When the electronic card 3 continues to press the movable clamping member 2 downward to displace relative to the base 1 until the positioning notch 310 is embedded by the positioning protrusion 23, the movable clamping member 2 can be displaced towards the direction of returning to the initial clamping position 200 by the elastic restoring force of the elastic arm 21, and the pressing portion 231 is blocked at the upper portion of the end edge of the positioning notch 310 (as shown in fig. 6), so that the end edge of the electronic card 3 with the positioning notch 310 cannot release the clamping of the pressing portion 231 to be in a positioning state, and at this time, the positioning protrusion 23 can provide lateral stabilization of the electronic card 3 for the embedding of the positioning notch 310, thereby avoiding the deviation of the electrical connection terminal 32 caused by unexpected lateral deviation.

On the contrary, when the assembled electronic card 3 is to be disassembled, an external force can be applied to the movable clamping member 2 to move the movable clamping member 2 from the clamping position 200 toward the releasing position 201, and the positioning protrusion 23 and the pressing portion 231 move out of the position of the positioning notch 310 for clamping the electronic card 3, and the electronic card 3 can tilt up the clamping end 31 with the positioning notch 310 to a position easy to disassemble (as shown in fig. 7) by applying the elasticity of the electrical connection end 32 to the terminal base 40.

It should be noted that the above-mentioned stopping portion 11 may also be disposed on the movable clamping member 2 according to the requirement, and the elastic arm 21 may be disposed at a corresponding position on the base 1, so as to achieve the same effect in practical application.

Referring to fig. 8 to 14, the structure of the second embodiment of the present invention includes a base 10 and a movable clamping member 20, wherein the base 10 can be fixedly assembled on a motherboard 30 by bonding, welding or other component connection for installing the side of the electronic card 3, and a stop portion 11 and a guiding portion 13 are provided on the base 10.

The movable clamping member 20 is assembled on the base 10, the movable clamping member 20 has a guided portion 25, the guided portion 25 can be assembled with the guiding portion 13, the movable clamping member 20 forms an elastic displacement path between a clamping position 200 (as shown in fig. 11 and 13) and a releasing position 201 (as shown in fig. 14) on the base 10 relative to the electronic card 3, the movable clamping member 20 is provided with an elastic arm 21 corresponding to the blocking portion 11 towards the base 10, the blocking portion 11 is located on the displacement path of the elastic arm 21 along with the elastic displacement of the movable clamping member 20, a guiding inclined plane 111 is provided on a side surface of the blocking portion 11 towards the elastic arm 21, a positioning convex portion 23 corresponding to the positioning notch 310 is provided on a side of the movable clamping member 20 towards the electronic card 3, a protruding pressing portion 231 is provided above the positioning convex portion 23, and a slant 232 is provided on the pressing portion 231 towards the electronic card 3 (towards the positioning notch 310 direction of the electronic card 3).

In the present embodiment, the base 10 has a receiving space 14 capable of receiving the blocking portion 11, and the receiving space 14 can also receive the elastic arm 21 when the movable fastening member 20 is assembled on the base 10, the guiding portion 13 has elongated side extending portions 132 disposed at two sides of the receiving space 14, the two side extending portions 132 extend along the elastic displacement direction of the movable fastening member 20 relative to the base 10, and a vertically protruding protrusion 131 is disposed at a middle section of the two side extending portions 132.

The guided portion 25 has a lateral guide groove 252 disposed at two sides of the movable fastening member 20 and corresponding to the lateral extension portion 132, the two lateral guide grooves 252 respectively accommodate the two lateral extension portions 132, vertically extending lower notches 251 are respectively disposed on the two lateral guide grooves 252, the lower notches 251 accommodate the protruding portion 131, and the width of the lower notches 251 is greater than that of the protruding portion 131, so that the two lateral guide grooves 252 can form a movable guide for the two lateral extension portions 132, and cooperate with the lower notches 251 to limit the movable travel of the protruding portion 131, so that the movable fastening member 20 can be normally assembled on the base 10, and form a guide and a limit of an elastic displacement path.

In practical application, if the electronic card 3 is to be assembled, the electrical connection end 32 of the electronic card 3 with pins is inserted and combined into the terminal seat 40, at this time, the fastening end 31 of the electronic card 3 with the positioning notch 310 keeps an elastically tilted state, the movable fastening member 20 is located at the initial fastening position 200 (as shown in fig. 11) where the electronic card 3 is not fastened, the user can directly press the electronic card 3 to make the fastening end 31 gradually touch the inclined surface 232 to slide downwards, and meanwhile, the inclined surface 232 is utilized to link the movable fastening member 20 to displace away from the electronic card 3 towards the releasing position 201, so that the positioning protrusion 23 and the pressing portion 231 of the movable fastening member 20 displace to a position close to the fastening end 31 of the electronic card 3 or the end edge of the positioning notch 310 (as shown in fig. 12).

In the gradual displacement process, the elastic arm 21 is gradually pushed by the guide inclined surface 111 of the blocking portion 11 to generate elastic bending, and the elastic restoring force capable of restoring to the initial blocking position 200 is accumulated, and the lateral guide groove 252 of the guided portion 25 is limited to displace along the allowed direction of the lateral extension 132 of the guiding portion 13, that is, displacement can be performed only along the displacement path between the blocking position 200 and the releasing position 201 of the electronic card 3, and the lateral leaning action between the lateral guide groove 252 and the lateral extension 132 can be further provided by using the vertical elastic force generated by the elastic arm 21 blocked by the guide inclined surface 111 of the blocking portion 11, so as to effectively eliminate the loosening phenomenon therebetween.

When the electronic card 3 continues to press the movable clamping member 20 downward to displace relative to the base 10 until the positioning notch 310 is embedded by the positioning protrusion 23, the movable clamping member 20 can be displaced towards the direction of returning to the initial clamping position 200 by the elastic restoring force of the elastic arm 21, so that the pressing portion 231 is blocked at the upper portion of the end edge of the positioning notch 310 (as shown in fig. 13), and the end edge of the electronic card 3 with the positioning notch 310 cannot release the clamping of the pressing portion 231 to be in a positioning state, and at this time, the positioning protrusion 23 can provide lateral stabilization of the electronic card 3 for the embedding of the positioning notch 310, thereby avoiding the deviation of the electrical connection terminal 32 due to unexpected lateral deviation.

On the contrary, when the assembled electronic card 3 is to be disassembled, an external force can be applied to the movable clamping member 20 to move the movable clamping member 20 from the clamping position 200 toward the releasing position 201, and the positioning protrusion 23 and the pressing portion 231 are moved out of the position of the positioning notch 310 for clamping the electronic card 3, and the electronic card 3 can tilt up the clamping end 31 with the positioning notch 310 to a position easy to disassemble (as shown in fig. 14) by applying the elasticity of the electrical connection end 32 to the terminal block 40.

It should be noted that the above-mentioned stopping portion 11 may also be disposed on the movable locking member 20 according to the requirement, and the elastic arm 21 may be disposed at a corresponding position on the base 10, so as to achieve the same effect in practical application.

In view of the foregoing, the electronic buckle fixing device of the present invention can achieve the effects of simplifying the structure, being easy to assemble and reducing the production cost, and is a novel and advanced invention, and the invention is claimed in the law.

Claims (7)

1. The electronic buckle fixing device is characterized by comprising a base body arranged on a host board and a movable clamping piece combined with the base body, wherein a blocking part, an elastic arm corresponding to the blocking part, a guiding part and a guided part corresponding to the guiding part are arranged between the base body and the movable clamping piece, the guided part can be combined with the guiding part, the movable clamping piece can perform elastic displacement between a clamping position and a releasing position relative to a position for arranging an electronic clamp on the base body, the elastic arm is arranged on one of the base body and the movable clamping piece, the blocking part is arranged on the other one of the base body and the movable clamping piece, when the movable clamping piece moves towards the releasing position under the action of external force, the movable clamping piece can be moved out of the position of the electronic clamp under the action of the blocking part, the elastic arm can be elastically deformed relative to the position for arranging the electronic clamp, and the elastic arm can restore the elastic clamping piece to the releasing the elastic clamping piece under the action of the elastic restoring force when the elastic arm is restored to the elastic clamping piece.

2. The electronic fastener according to claim 1, wherein a side surface of the stopper facing the elastic arm is provided with a guide slope.

3. The electronic fastener fixing device according to claim 1 or 2, wherein the movable fastener has an accommodating space capable of accommodating the elastic arm and the blocking portion, the guided portion is a long hollow guide groove arranged at the side of the accommodating space, the long hollow guide groove extends along the elastic displacement direction of the movable fastener relative to the base, the guiding portion is an elastic sheet arranged at the side of the base and corresponding to the long hollow guide groove, the elastic sheet is provided with a hook portion protruding into the long hollow guide groove, and the long hollow guide groove can perform displacement guiding and displacement stroke limiting functions on the hook portion, so that the movable fastener can be combined on the base and form guiding and limiting of an elastic displacement path.

4. The electronic fastener according to claim 1 or 2, wherein the base has a receiving space for receiving the stopper and the elastic arm, the guide has an elongated side extension portion disposed beside the receiving space, the side extension portion extends along the elastic displacement direction of the movable fastener relative to the base, a vertically protruding portion is disposed in a middle section of the side extension portion, the guided portion has a transverse guide groove disposed beside the movable fastener and corresponding to the side extension portion, the transverse guide groove accommodates the side extension portion, a vertically extending lower notch is disposed on the transverse guide groove, the lower notch accommodates the protruding portion, and the width of the lower notch is larger than that of the protruding portion, and the guide of the displacement formed by the transverse guide groove to the side extension portion cooperates with the lower notch to limit the displacement of the protruding portion, so that the movable fastener can be assembled on the base and form a guide and a limitation of an elastic displacement path.

5. The electronic card fixing device according to claim 1 or 2, wherein two ends of the electronic card are respectively provided with a clamping end and an electric connection end, the electric connection end can be electrically connected with a terminal seat arranged on a motherboard, a positioning notch is arranged at the edge of the clamping end, a positioning convex part corresponding to the positioning notch is arranged in the direction of the movable clamping piece towards the electronic card, a pressing part protruding towards the electronic card is arranged above the positioning convex part, and an inclined plane is arranged in the direction of the pressing part towards the positioning notch of the electronic card.

6. The electronic card fixing device according to claim 3, wherein the two ends of the electronic card are respectively provided with a clamping end and an electric connection end, the electric connection end can be electrically connected with a terminal seat arranged on the motherboard, a positioning notch is arranged at the edge of the clamping end, a positioning convex part corresponding to the positioning notch is arranged in the direction of the movable clamping piece towards the electronic card, a pressing part protruding towards the electronic card is arranged above the positioning convex part, and an inclined plane is arranged in the direction of the pressing part towards the positioning notch of the electronic card.

7. The electronic card fixing device according to claim 4, wherein the two ends of the electronic card are respectively provided with a clamping end and an electric connection end, the electric connection end can be electrically connected with a terminal seat arranged on the motherboard, a positioning notch is arranged at the edge of the clamping end, a positioning convex part corresponding to the positioning notch is arranged in the direction of the movable clamping piece towards the electronic card, a pressing part protruding towards the electronic card is arranged above the positioning convex part, and an inclined plane is arranged in the direction of the pressing part towards the positioning notch of the electronic card.