TWI875465B - Electronic card retaining device - Google Patents

Abstract

An electronic card retaining device includes a seat mounted on a motherboard and a movable retaining member. The seat is provided with a stopper section and a guide section; the movable retaining member has an elastic arm corresponding to the stopper section and a mating guide section for engaging with the guide section. When the movable retaining member is assembled to the seat, the elastic arm can be pressed against the stopper section and elastically deformed; and the guide section and the mating guide section can engage with each other to guide the movable retaining member to elastically displace on the seat relative to a position to where an electronic card is to be fixed between a retaining position and a release position. With the above arrangements, the electronic card retaining device so formed is structurally simplified and easily operable for conveniently, securely and elastically retaining or releasing the electronic card to or from the motherboard.

Description

Electronic snap-on device

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

The traditional solid state drive (SSD) standard is the mSATA standard, but it is limited by the number of flash memories that can be arranged on the printed circuit board (PCB), resulting in a limited overall capacity. Therefore, the newer NGFF (Next Generation Form Factor; also known as M.2) standard for solid state drives was created. Since the M.2 standard can arrange flash memory chips on both sides of the circuit board, it has a smaller size and higher capacity than the traditional mSATA standard, and also has the advantage of helping to reduce costs.

Generally, M.2 standard solid state drives have a variety of lengths to choose from, and computer motherboards are also designed to share solid state drives of various lengths. In response to the need to fix solid state drives of different lengths, screws and studs are currently mostly used to lock and fix M.2 standard solid state drives on computer motherboards; however, the combination of screws and studs is not only very inconvenient in assembly and disassembly, but also requires studs to be buried in the computer motherboard for screw locking, which leads to increased costs.

In the invention case of the Republic of China Patent Publication No. I568334, an assembly fastener is disclosed, comprising: a bearing portion, a hinge portion, a protruding portion and a pressing portion; the bearing portion has a bearing surface and a back surface opposite to each other. The hinge portion and the protruding portion protrude from the back surface of the bearing portion and the bearing surface of the bearing portion respectively, and extend along the axial direction of the hinge portion. The pressing portion protrudes from one side of the protruding portion and extends along the radial direction of the hinge portion, so that a locking groove is formed between the pressing portion and the bearing portion, and a release notch is provided next to the locking groove and is not covered by the pressing portion.

When the above structure is used, the assembly clip can insert the hinge part into the corresponding assembly hole on the computer motherboard according to the specifications of the solid state hard disk, and a tool (such as a flat-blade screwdriver) is inserted into the preset operating groove on the protrusion to rotate the protrusion of the assembly clip so that the locking groove and the release notch located on two opposite sides can face the solid state hard disk respectively, thereby forming different states such as fixed or released; however, when this device is actually used, it must be operated with a specific tool (a flat-blade screwdriver), and the operation method of rotating the protrusion is also more troublesome, and the effect of easy operation cannot be achieved.

A tool-free grounding quick-release device is disclosed in the utility model case of Chinese patent announcement No. CN 209390455U, which has a male buckle and a female buckle; the female buckle has a main body, and the main body has an interference sleeve that can be inserted into a fixing hole on a circuit board, a clamping hole is recessed at the top of the interference sleeve, and a metal grounding buckle is combined around the clamping hole; the male buckle has a pressing part, and a plug is protruding from the center of the pressing part; and at least one bendable flexible connecting belt is provided between the pressing part and the main body.

When in use, the plug of the male buckle is inserted into the hole of the female buckle, and the pressing portion can be used to press on the edge of the M.2 card (solid state hard drive) around the notch to form grounding and positioning; this device not only has a complex overall structure, but also is difficult to process, and is not economical to use in low-priced components.

In addition, a retaining device assembly is disclosed in the invention case of Chinese patent publication No. CN 109659727A, wherein the retaining device has a main body component arranged on a circuit board, and at least one clamping member is accommodated inside the main body component. A clamping portion is provided in a recessed manner on one side of the clamping member, and a spring sheet or elastic member that can push against the clamping member is further provided inside the main body component, so that the clamping member can maintain a stretchable and skew elasticity.

In actual application, the edge of the electronic card (solid state hard disk) can be directly pressed down from the top of the card holder, so that the card holder produces elastic movements of compression and deflection, and the engaging portion is clamped around the notch of the edge of the electronic card (solid state hard disk) to form an easy-to-operate and stable positioning; however, the composition of the above-mentioned structure is relatively complicated and difficult to assemble, which does not meet the economic benefits of low-priced components.

In view of the above-mentioned shortcomings of the conventional electronic card (solid state hard disk) buckle positioning device in actual application, the inventor has studied ways to improve these shortcomings, and finally the present invention is produced.

The main purpose of the present invention is to provide an electronic card fastening device, comprising: a base body arranged on a motherboard and a movable fastening member assembled with the base body, a stopper, an elastic arm and a guide portion corresponding to the stopper, and a guided portion corresponding to the guide portion are arranged between the base body and the movable fastening member; the guided portion can be assembled with the guide portion, so that the movable fastening member can be elastically displaced between a fastening position and a release position on the base body relative to a position for mounting an electronic card; When the movable latching part is acted upon by an external force and moves from the initial latching position toward the releasing position, the movable latching part can be moved out of the position for latching the electronic card, and the elastic arm can be acted upon by the blocking portion to produce elastic deformation and accumulate elastic restoring force; when the external force acting on the movable latching part is released, the elastic arm can, through the action of the elastic restoring force, cause the movable latching part to move back from the releasing position to the latching position for latching the electronic card, thereby forming an electronic card buckling device with a simple structure and convenient assembly.

Another object of the present invention is to provide an electronic card fastening device, wherein a guiding slope is provided on a side surface of the blocking portion facing the elastic arm, so that the elastic arm is blocked and the above-mentioned elastic restoring force is generated. At the same time, due to the action of the guiding slope, the guided portion can generate a force in a direction perpendicular to the displacement path of the guiding portion, so as to eliminate the combined gap between the guiding portion and the guided portion, and avoid looseness between the base and the movable fastening member to affect the fastening effect of the electronic card.

To achieve the above-mentioned purpose and effect, the technical means adopted by the present invention include: an electronic card fastening device, comprising: a base body arranged on a motherboard and a movable fastening member combined with the base body, a stopper, an elastic arm and a guide portion corresponding to the stopper, and a guided portion corresponding to the guide portion are arranged between the base body and the movable fastening member; the guided portion can be combined with the guide portion, so that the movable fastening member can be elastically displaced between a fastening position and a release position on the base body relative to a position for installing an electronic card, and the elastic arm is arranged The base and the movable card member are arranged on one of the base and the movable card member, and the blocking portion is arranged on the other of the base and the movable card member; when the movable card member is subjected to an external force and moves from the initial locking position toward the releasing position, the movable card member can be moved out of the position of locking the electronic card, and the elastic arm is subjected to the action of the blocking portion to produce elastic deformation and accumulate elastic restoring force; when the external force acting on the movable card member is released, the elastic arm can, through the action of the above-mentioned elastic restoring force, move the movable card member back from the releasing position to the locking position of locking the electronic card.

According to the above structure, a guiding slope is provided on a side surface of the blocking portion facing the elastic arm.

According to the above structure, the movable clamping part has a receiving space that can accommodate the elastic arm and the blocking part, the guided part is an elongated hollow guide groove arranged on the side of the receiving space, and the elongated hollow guide groove is extended along the elastic displacement direction of the movable clamping part relative to the base body; and the guiding part is an elastic sheet arranged on the side of the base body corresponding to the elongated hollow guide groove, and the elastic sheet is provided with a hook protruding into the elongated hollow guide groove; the elongated hollow guide groove can produce a displacement guiding and displacement stroke limiting effect on the hook, so that the movable clamping part can be assembled on the base body and form a guide and limit for the elastic displacement path.

According to the above structure, the base has a receiving space capable of accommodating the blocking portion and the elastic arm, the guiding portion has an elongated side extension portion arranged beside the receiving space, the side extension portion extends along the elastic displacement direction of the above-mentioned active clamping member relative to the base, and a vertically protruding protrusion portion is provided in the middle section of the side extension portion; and the guided portion has a transverse side extension portion arranged beside the active clamping member corresponding to the side extension portion. A guide groove, the transverse guide groove accommodates the side extension part, and a vertically extending lower notch is provided on the transverse guide groove, the lower notch accommodates the protruding part, and the width of the lower notch is larger than the protruding part; the transverse guide groove guides the displacement of the side extension part, and the lower notch limits the displacement stroke of the protruding part, so that the movable clamping part can be assembled on the base in a standard manner, and forms a guide and limit for the elastic displacement path.

According to the above structure, the two ends of the electronic card are respectively provided with a card end and an electrical connection end, the electrical connection end can form an electrical connection with a terminal seat arranged on the motherboard, and a positioning notch is provided at the edge of the card end; the movable card component is provided with a positioning protrusion corresponding to the positioning notch toward the direction of the electronic card, and a pressing part protruding toward the direction of the electronic card is provided above the positioning protrusion, and the pressing part is provided with an inclined surface toward the positioning notch of the electronic card.

In order to make the above-mentioned purpose, effect and characteristics of the present invention more specifically understood, the following drawings are provided for explanation:

Please refer to Figures 1 to 7, it can be seen that the structure of the first embodiment of the present invention includes: a base 1 and a movable card member 2. The base 1 can be fixedly assembled on a motherboard 30 for setting the side of the electronic card 3 (which can be a solid state drive) by bonding, welding or connecting with other components. A stopper 11 and a guide portion 12 are provided on the base 1.

The movable card member 2 is assembled on the base 1, and has a guided portion 22. The guided portion 22 can be assembled with the guiding portion 12, and the movable card member 2 can form an elastic displacement path between a clamping position 200 (as shown in Figures 4 and 6) and a release position 201 (as shown in Figure 7) on the base 1 relative to the electronic card 3. The movable card member 2 is provided with an elastic arm 21 corresponding to the stopping portion 11 toward the base 1. The stopping portion 11 is located on the displacement path of the elastic arm 21 as the movable card member 2 is elastically displaced, and a guiding slope 111 is provided on a side surface of the stopping portion 11 facing the elastic arm 21.

In this embodiment, when the movable clamping component 2 is assembled on the base body 1, a receiving space 24 that can accommodate the elastic arm 21 and the blocking portion 11 is formed between the movable clamping component 2 and the base body 1, and the guided portion 22 is an elongated hollow guide groove 220 arranged in the middle section of both sides of the receiving space 24, and the elongated hollow guide groove 220 is extended along the elastic displacement direction of the above-mentioned movable clamping component 2 relative to the base body 1.

The guide portion 12 can be an elastic sheet 121 arranged on the side of the base body 1 corresponding to the elongated hollow guide groove 220, and a hook portion 122 protruding into the inside of the elongated hollow guide groove 220 is arranged on the elastic sheet 121; the elongated hollow guide groove 220 is used to guide the displacement direction and limit the movable stroke of the hook portion 122, so that the movable clamping component 2 is assembled on the base body 1 in a standard manner, and the guidance and limitation of the elastic displacement path are formed.

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

In actual application, if the electronic card 3 is to be assembled, the electrical connection end 32 of the electronic card 3 with the pins can be first plugged into a terminal seat 40. At this time, the locking end 31 of the electronic card 3 with the positioning notch 310 remains in an elastic upward state, and the movable locking member 2 is located at the initial locking position 200 (as shown in FIG. 4 ) where the electronic card 3 has not been locked. The user can directly press down the electrical connection end 32 of the electronic card 3 to lock the electronic card 3. The daughter card 3 causes the engaging end 31 to gradually contact the inclined surface 232 and slide downward, and at the same time, the inclined surface 232 is used to link the active card member 2 to move away from the electronic card 3 toward the release position 201, so that the positioning protrusion 23 and the pressing portion 231 of the active card member 2 are moved to a position close to the engaging end 31 of the electronic card 3 or the end edge of the positioning notch 310 (as shown in FIG. 5 ).

During the above gradual displacement process, the elastic arm 21 is gradually blocked and pushed by the guide slope 111 of the blocking portion 11 to produce elastic bending and accumulate elastic restoring force that can be restored to the initial clamping position 200, and the elongated hollow guide groove 220 of the guided portion 22 is restricted to move in the direction allowed by the hook portion 122 of the guide portion 12, that is, it can only move in the direction allowed by the hook portion 122 of the guide portion 12. The elastic arm 21 is displaced along the displacement path between the clamping position 200 and the releasing position 201 relative to the electronic card 3, and the vertical elastic force generated by the elastic arm 21 being blocked by the guiding inclined surface 111 of the blocking portion 11 can provide a lateral abutment effect between the elongated hollow guide groove 220 and the hook portion 122, thereby effectively eliminating the looseness therebetween.

When the electronic card 3 continues to press downward to displace the movable card member 2 relative to the base 1 until the positioning notch 310 is embedded by the positioning protrusion 23, the elastic restoring force of the elastic arm 21 can cause the movable card member 2 to displace in the direction of returning to the initial locking position 200, and the pressing portion 231 is blocked at the upper part 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 be released from the clamping of the pressing portion 231 and is in a positioned state. At this time, the positioning protrusion 23 is embedded in the positioning notch 310, which can provide a lateral stabilization effect on the electronic card 3, thereby avoiding an unexpected lateral deviation that causes an error in the electrical connection of the electrical connection terminal 32.

On the contrary, if the assembled electronic card 3 is to be disassembled, an external force can be applied to the movable card member 2 to move the movable card member 2 from the locking position 200 toward the release position 201, and the positioning protrusion 23 and the pressing portion 231 move out of the position of the positioning notch 310 that locks the electronic card 3. The electronic card 3 applies the elasticity of the electrical connection end 32 through the terminal seat 40, so that the locking end 31 with the positioning notch 310 can be tilted upward to a position that is easy to disassemble (as shown in Figure 7).

It should be noted that the blocking portion 11 can also be disposed on the movable clamping member 2 as required, and the elastic arm 21 can be disposed at a corresponding position on the base 1, and the same effect can be achieved in practical applications.

8 to 14 , it can be seen that the structure of the second embodiment of the present invention includes: a base 10 and a movable card member 20. The base 10 can be fixedly assembled on a motherboard 30 for setting the side of the electronic card 3 by bonding, welding or connecting with other components. A stopper 11 and a guide 13 are provided on the base 10.

The movable card member 20 is assembled on the base 10. The movable card member 20 has a guided portion 25. The guided portion 25 can be assembled with the guiding portion 13, and the movable card member 20 forms an elastic displacement path between a clamping position 200 (as shown in Figures 11 and 13) and a release position 201 (as shown in Figure 14) on the base 10 relative to the electronic card 3. The movable card member 20 is provided with an elastic arm 21 corresponding to the stop portion 11 toward the base 10. The stop portion 11 1 is located on the displacement path of the elastic arm 21 along with the elastic displacement of the movable card member 20; and the blocking portion 11 is provided with a guiding inclined surface 111 on a side surface facing the elastic arm 21, and the movable card member 20 is provided with a positioning protrusion 23 corresponding to the positioning notch 310 on a side facing the electronic card 3, and a protruding pressing portion 231 is provided above the positioning protrusion 23, and the pressing portion 231 is provided with an inclined surface 232 in the direction of pressing the electronic card 3 (towards the positioning notch 310 of the electronic card 3).

In this embodiment, the base 10 has a receiving space 14 that can accommodate the blocking portion 11. When the movable clamping member 20 is assembled on the base 10, the receiving space 14 can also accommodate the elastic arm 21 at the same time; the guide portion 13 has an elongated side extension portion 132 arranged on both sides of the receiving space 14, and the two side extension portions 132 extend along the elastic displacement direction of the above-mentioned movable clamping member 20 relative to the base 10, and a vertically protruding protrusion 131 is respectively provided in the middle section of the two side extension portions 132.

The guided portion 25 has transverse guide grooves 252 arranged on both sides of the movable clamping member 20 corresponding to the side extension portion 132. The two transverse guide grooves 252 respectively accommodate the two side extension portions 132. The two transverse guide grooves 252 are respectively provided with vertically extending lower notches 251. The lower notches 251 accommodate the protruding portion 131, and the width of the lower notches 251 is larger than the protruding portion 131. The two transverse guide grooves 252 can form active guides for the two side extension portions 132. The lower notches 251 can limit the active travel of the protruding portion 131, so that the movable clamping member 20 can be assembled on the base 10 in a standard manner, and the elastic displacement path can be guided and limited.

In actual application, if the electronic card 3 is to be assembled, the electrical connection end 32 of the electronic card 3 with the pins can be first plugged into a terminal seat 40. At this time, the locking end 31 of the electronic card 3 with the positioning notch 310 remains in an elastic upward state, and the movable locking member 20 is located at the initial locking position 200 (as shown in FIG. 11 ) where the electronic card 3 has not been locked. The user can directly press down the electronic card 3. The card 3 is pressed by the inclined surface 232, so that the card end 31 gradually contacts the inclined surface 232 and slides downward. At the same time, the movable card member 20 is linked to the inclined surface 232 to move away from the electronic card 3 toward the release position 201, so that the positioning protrusion 23 and the pressing portion 231 of the movable card member 20 are moved to a position close to the card end 31 of the electronic card 3 or the end edge of the positioning notch 310 (as shown in FIG. 12).

During the above gradual displacement process, the elastic arm 21 is gradually blocked and pushed by the guide slope 111 of the blocking portion 11 to generate elastic bending and accumulate elastic restoring force that can be restored to the initial clamping position 200, and the transverse guide groove 252 of the guided portion 25 is restricted to move in the direction allowed by the side extension portion 132 of the guide portion 13, that is, only It can move along the displacement path between the clamping position 200 and the releasing position 201 relative to the electronic card 3, and utilize the vertical elastic force generated by the elastic arm 21 being blocked by the guiding inclined surface 111 of the blocking portion 11 to provide a lateral abutment effect between the transverse guide groove 252 and the side extension portion 132, effectively eliminating the looseness therebetween.

When the electronic card 3 continues to press downwards to displace the movable card member 20 relative to the base 10 until the positioning notch 310 is embedded by the positioning protrusion 23, the elastic restoring force of the elastic arm 21 can cause the movable card member 20 to displace in the direction of returning to the initial locking position 200, so that the pressing portion 231 stops at the upper part of the end edge of the positioning notch 310 (as shown in FIG. 13), so that the end edge of the electronic card 3 with the positioning notch 310 cannot be released from the clamping of the pressing portion 231 and is in a positioned state. At this time, the positioning protrusion 23 is embedded in the positioning notch 310, which can provide a lateral stabilization effect on the electronic card 3, thereby avoiding an unexpected lateral deviation that causes an error in the electrical connection of the electrical connection terminal 32.

On the contrary, if the assembled electronic card 3 is to be disassembled, an external force can be applied to the movable card member 20 to move the movable card member 20 from the locking position 200 toward the release position 201, and the positioning protrusion 23 and the pressing portion 231 are moved out of the position of the positioning notch 310 that locks the electronic card 3. The electronic card 3 applies the elasticity of the electrical connection end 32 through the terminal seat 40, so that the locking end 31 with the positioning notch 310 can be tilted upward to a position that is easy to disassemble (as shown in Figure 14).

It should be noted that the blocking portion 11 can also be disposed on the movable clamping member 20 as required, and the elastic arm 21 can be disposed at a corresponding position on the base 10, and the same effect can be achieved in practical applications.

In summary, the electronic snap-on device of the present invention can achieve the effects of simplified structure, easy assembly and reduced production cost, and is indeed a novel and progressive invention, and therefore an invention patent application is filed in accordance with the law; however, the above description is only for the better embodiment of the present invention, and all changes, modifications, alterations or equivalent substitutions extended from the technical means and scope of the present invention should also fall within the scope of the patent application of the present invention.

1,10: base 11: stopper 111: guide slope 12,13: guide part 121: elastic sheet 122: hook part 131: protrusion 132: side extension part 14,24: storage space 2,20: movable clamping part 200: clamping position 201: release position 21: elastic arm 22,25: guided part 220: long hollow guide groove 23: positioning protrusion 231: pressing part 232: slope 251: lower notch 252: horizontal guide groove 3: electronic card 30: motherboard 31: card end 310: positioning notch 32: electrical connection end 40: Terminal block

[Fig. 1] is a three-dimensional exploded view of the first embodiment of the present invention.

[Fig. 2] is a combined appearance diagram of the first embodiment of the present invention.

[Figure 3] is a cross-sectional view along the A-A direction of Figure 2.

[Fig. 4] is a schematic diagram (I) of the application of the first embodiment of the present invention, which reveals the state of the electronic card before being locked and positioned by the movable card component.

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

[Fig. 6] is a schematic diagram (III) of the application of the first embodiment of the present invention, which reveals the state of the electronic card being locked and positioned by the movable card component.

FIG. 7 is a schematic diagram (IV) of the application of the first embodiment of the present invention, which reveals the state in which the movable card member releases the locking position of the electronic card.

[Fig. 8] is a three-dimensional exploded view of the second embodiment of the present invention.

[Fig. 9] is a combined appearance diagram of the second embodiment of the present invention.

FIG. 10 is a front plan view of FIG. 9 along the moving direction of the movable clamping member. FIG.

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

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

[Fig. 13] is a schematic diagram (III) of the application of the second embodiment of the present invention, which reveals the state of the electronic card being locked and positioned by the movable card component.

FIG. 14 is a schematic diagram (IV) of the application of the second embodiment of the present invention, which reveals the state in which the movable card member releases the locking position of the electronic card.

1: Seat

11: Stopper

111:Guide slope

12: Guidance Department

121: Elastic sheet

122: Hook

2: Movable card parts

21: Elastic arm

22: Guided Department

220: Long hollow guide groove

23: Positioning convex part

231: Pressing Department

232: Slope

24: Containment Space

3: Electronic card

31: Card end

310: Positioning gap

Claims (7)

An electronic card fastening device includes: a base body arranged on a motherboard and an active card member combined with the base body, a stopper, an elastic arm and a guide portion corresponding to the stopper, and a guided portion corresponding to the guide portion are arranged between the base body and the active card member; the guided portion can be combined with the guide portion, so that the active card member can be elastically displaced between a locking position and a release position on the base body relative to a position for installing an electronic card, and the elastic arm is arranged between the base body and the active card member. One of them, and the blocking portion is arranged on the other one of the base and the movable locking member; when the movable locking member is subjected to the external force and moves from the initial locking position toward the releasing position, the movable locking member can be moved out of the position of locking the electronic card, and the elastic arm is subjected to the action of the blocking portion to produce elastic deformation and accumulate elastic restoring force; when the external force acting on the movable locking member is released, the elastic arm can, through the action of the above-mentioned elastic restoring force, move the movable locking member back from the releasing position to the locking position of locking the electronic card. An electronic snap-on fixing device as described in claim 1, wherein a guiding slope is provided on a side surface of the blocking portion facing the elastic arm. An electronic card fastening device as described in claim 1 or 2, wherein the movable card component has a receiving space that can accommodate the elastic arm and the blocking portion, the guided portion is an elongated hollow guide groove arranged on the side of the receiving space, and the elongated hollow guide groove is extended along the elastic displacement direction of the movable card component relative to the base body; and the guiding portion is an elastic sheet arranged on the side of the base body corresponding to the elongated hollow guide groove, and the elastic sheet is provided with a hook portion protruding into the elongated hollow guide groove; the elongated hollow guide groove can produce a displacement guiding and displacement stroke limiting effect on the hook portion, so that the movable card component can be assembled on the base body and form a guide and limit for the elastic displacement path. The electronic card fastening device as described in claim 1 or 2, wherein the base has a receiving space capable of accommodating the blocking portion and the elastic arm, the guiding portion has an elongated side extension portion arranged beside the receiving space, the side extension portion extends along the elastic displacement direction of the above-mentioned active card member relative to the base, and a vertically protruding protrusion portion is provided in the middle section of the side extension portion; and the guided portion has a side extension portion arranged beside the active card member corresponding to the elastic arm. A transverse guide groove of the side extension portion accommodates the side extension portion, and a vertically extending lower notch is provided on the transverse guide groove, the lower notch accommodates the protruding portion, and the width of the lower notch is larger than the protruding portion; the transverse guide groove guides the displacement of the side extension portion, and the lower notch limits the displacement stroke of the protruding portion, so that the movable clamping part can be assembled on the base in a standard manner, and forms a guide and limit for the elastic displacement path. An electronic card fastening device as described in claim 1 or 2, wherein the two ends of the electronic card are respectively provided with a card end and an electrical connection end, the electrical connection end can form an electrical connection with a terminal block arranged on the motherboard, and a positioning notch is provided at the edge of the card end; the movable card component is provided with a positioning protrusion corresponding to the positioning notch toward the electronic card, and a pressing portion protruding toward the electronic card is provided above the positioning protrusion, and the pressing portion is provided with an inclined surface toward the positioning notch of the electronic card. An electronic card fastening device as described in claim 3, wherein the two ends of the electronic card are respectively provided with a card end and an electrical connection end, the electrical connection end can form an electrical connection with a terminal block arranged on the motherboard, and a positioning notch is provided at the edge of the card end; the movable card component is provided with a positioning protrusion corresponding to the positioning notch toward the electronic card, and a pressing portion protruding toward the electronic card is provided above the positioning protrusion, and the pressing portion is provided with an inclined surface toward the positioning notch of the electronic card. An electronic card fastening device as described in claim 4, wherein the two ends of the electronic card are respectively provided with a card end and an electrical connection end, the electrical connection end can form an electrical connection with a terminal block arranged on the motherboard, and a positioning notch is provided at the edge of the card end; the movable card component is provided with a positioning protrusion corresponding to the positioning notch toward the electronic card, and a pressing part protruding toward the electronic card is provided above the positioning protrusion, and the pressing part is provided with an inclined surface toward the positioning notch of the electronic card.

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