TW202325126A - Multi-axis adjustable holding system for expansion card - Google Patents

Abstract

The present invention provides a multi-axis adjustable holding system for expansion card comprising a fixing structure, a first holding member, a second holding member, a third holding member and a fourth holding member, the first holding portion of the first holding member holds the expansion card in a length direction of the expansion card, a first adjustment portion of the first holding member adjusts the position in the length direction of the expansion card and is fixed to the fixing structure, a second adjustment unit of the second holding member adjusts the position of the second holding unit in the height direction of the expansion card to hold the expansion card and is fixed to the fixing structure, the third adjusting portion of the third holding element and the fourth adjusting portion of the fourth holding element adjust the positions of the third holding portion and the fourth holding portion in the width direction of the expansion card to clamp the expansion card, and the third adjusting portion and the fourth adjusting portion are fixed to the fixing structure.

Description

Multi-Axis Adjustable Retention System for Expansion Cards

The invention relates to a holding system for expansion cards, in particular to a multi-axis adjustable holding system for expansion cards, which uses a plurality of holding pieces to hold expansion cards in multiple directions.

In the face of increasingly harsh use environments and fields, whether the expansion card can be firmly fixed is related to whether the system can operate stably. However, in the current technology that only fixes the expansion card in one direction, the shock resistance can only reach 0.5G, and when the vibration occurs in an unexpected direction, the expansion card will still fall out of the slot due to system vibration, causing system failure. Signal loss may even cause serious problems such as system crashes.

In addition, with the expansion of the functions of the expansion cards, the external dimensions of the expansion cards are no longer fixed. Therefore, the original fixing method is bound to be incapable of universal use, and a new structure and fixing method are needed to solve these problems.

In order to solve the problems in the prior art, the present invention provides a multi-axis adjustable holding system for expansion cards, including a fixed structure, a first holding part, a second holding part, a third holding part and a first Four holders. The multi-axis adjustable holding system for expansion cards is suitable for holding an expansion card including a connector, wherein the expansion card is inserted into a slot of a circuit board with the connector, and the expansion card further includes a connector-mounted A bottom, a top opposite to the bottom, two ends of a front end respectively connected to the bottom and the top, two sides connected to the top and the bottom and opposite to each other a first side and a second side. Especially, at least a part of the expansion card is arranged in a setting space defined by the fixing structure, and the slot is located in the setting space. The first holding part includes a first holding part and a first adjusting part, wherein the first adjusting part is configured to adjust its position on the fixed structure, and when the first adjusting part is set on the fixed structure, the first holding part holds the front end . The second holding member includes a second holding unit and a second adjusting unit, the second adjusting unit is configured to adjust the position of the holding top of the second holding unit, and when the second adjusting unit is arranged in a fixed structure, the second holding unit holds top. The third holding part includes a third holding part and a third adjusting part, the fourth holding part includes a fourth holding part and a fourth adjusting part, the third adjusting part and the fourth adjusting part are configured to adjust the third holding part part and the fourth holding part hold the positions of the first side and the second side respectively, and when the third adjusting part and the fourth adjusting part are fixed to the fixed structure, the third holding part and the fourth holding part hold the first side and the fourth holding part respectively. second side.

In at least one embodiment of the present invention, the first holding portion includes a first slot for a locking member to pass through the first slot to adjust the position of the front end of the first holding portion.

In at least one embodiment of the present invention, the first adjusting portion includes a second slot for a locking member to adjust the position of the first adjusting portion disposed on the fixing structure through the second slot.

In at least one embodiment of the present invention, the fixing structure further includes a bridge plate, which includes a first opening connecting the two opposite surfaces of the bridge plate, and the top is located between the first opening and the slot for the second holding The unit is pressed against the top through the first opening.

In at least one embodiment of the present invention, the second adjustment unit includes a first board and a second board connected by a first turning part, and a third board and a second board connected by a second turning part. The fourth plate, the first plate and the third plate each include a third slot, and the two third slots are located on opposite sides of the first opening and parallel to each other, so that the two locking pieces can pass through the two third slots respectively The hole adjusts the position of the second adjustment unit locked on the bridge plate, and wherein the second plate and the fourth plate each include a fourth slot parallel to each other for the other two locking pieces to pass through the two holes respectively. The fourth slot adjusts the position where the second holding unit presses against the top through the first opening.

In at least one embodiment of the present invention, the bridge plate further includes two fifth slots communicating with the two opposite plate surfaces of the bridge plate, so that the third holding part and the fourth holding part respectively pass through a fifth slot, and The first side and the second side are located between the third holding part and the fourth holding part, and the distance between the third holding part and the first side and the distance between the fourth holding part and the second side are adjusted, and the third Both the adjustment part and the fourth adjustment part further include a sixth slot hole for a locking piece to adjust the position of the third holding part and the fourth holding part to hold the first side and the second side through the second sixth slot, and the lock The firmware is locked to the bridge plate through the second and sixth slots.

In at least one embodiment of the present invention, the multi-axis adjustable holding system for expansion cards further includes a third adjustment member, which includes two seventh slots parallel to each other and at least one second opening, and the bridge plate is further Including an eighth slot connected to the opposite two board surfaces of the bridge plate, the third holding part and the fourth holding part respectively pass through the second opening through a fifth slot, the length of the second seventh slot and the eighth slot The directions are parallel to each other, wherein when the third holding part and the fourth holding part respectively hold the first side and the second side, the two seventh slots are used by the other two locking parts to adjust the position of the third adjusting part locked on the bridge plate, and at the same time The eighth slot is used for the locking member to be locked to the bridge plate through the second, sixth slot and eighth slot in sequence.

In at least one embodiment of the present invention, the multi-axis adjustable holding system for expansion cards further includes a first buffer unit disposed on the second holding unit, so that the first buffer unit is located between the second holding unit and the top between.

In at least one embodiment of the present invention, the multi-axis adjustable holding system for expansion cards further includes at least one second buffer unit, which is arranged on one of the third holding part and the fourth holding part, so that the second The buffer unit is located between the third holding portion and the first side, or the second buffer unit is located between the fourth holding portion and the second side.

In at least one embodiment of the present invention, the fixing structure is any one of the following: a frame, a casing, or a combination of a frame and a casing.

Through the multi-axis adjustable holding system that holds the expansion card in at least three directions, the invention can greatly improve the acceleration (force) tolerance when the expansion card is inserted into the slot, thereby avoiding the problem of force crash during use. In addition, the present invention can better adapt to expansion cards of various sizes and external contours through the position adjustment parts added to each holder.

Please refer to FIG. 1 and FIG. 2 , which are a schematic view and a schematic exploded view of a multi-axis adjustable holding system for an expansion card according to the present invention. As shown in Figures 1 and 2, the multi-axis adjustable holding system 1 for expansion cards includes a fixed structure 3, a first holding member (holding member) 11, a second holding member 12, and a third holding member 13 and a fourth holder 14.

Firstly, the multi-axis adjustable holding system 1 for expansion cards of the present invention is suitable for holding an expansion card 2 including a connector 20 . The expansion card 2 is inserted into a slot 41 of a circuit board 4 through the connector 20 .

As shown in FIG. 2, the expansion card 2 further includes a bottom 20a with a connector 20, two ends of a front end 21 are respectively connected to the bottom 20a and a top 22, and the two sides of the top 22 and the bottom 20a are connected to a first side opposite to each other. 23 and a second side 24. The connector 20 of the expansion card 2 can be, but not limited to, a card edge connector (golden finger), and is usually provided with a row of second terminals, and the side wall of the slot 41 is correspondingly provided with a row of first terminals to couple Connect to the second terminal. The circuit board 4 is usually a motherboard, but the invention is not limited thereto. The surface shapes of the first side 23 and the second side 24 of the expansion card 2 include planes or substantially planes (for example, the surface of the circuit board of the expansion card 2, the plane surface of the electronic components, the plane of the motor components (such as the plane surface of the heat sink) surface, etc.), a slope (eg, a sloped surface of a motor component), and a curved surface (eg, a curved surface of a motor component).

As shown in Figures 1 and 3, what can be defined in advance is: the direction in which the expansion card 2 is inserted into the slot 4 is defined as a first direction D1, and the extension direction of the connector 20 (for example, the direction of the plurality of second terminals) The arrangement direction, or the length direction of the slot 4) is defined as a second direction D2, and the normal vector of a plane formed by the first direction D1 and the second direction D2 (for example, the width direction of the slot 4) is defined as a third direction. Direction D3.

In detail, at least a part of the expansion card 2 is disposed in an installation space 30 defined by the fixing structure 3 . For example, the fixing structure 3 is any one of the following: a frame 31, a casing 32, or a combination of the frame 31 and the casing 32, for use in the multi-axis adjustable holding system 1 for expansion cards Each holding member is firmly supported, thereby stably holding the expansion card 2 . Generally speaking, the circuit board 4 is also disposed on the fixing structure 3 , and the slot 4 is located in the installation space 30 , and the casing 32 is usually disposed outside the frame 31 relative to the installation space 30 .

As shown in FIG. 3 , the first holding member 11 includes a first holding portion 110 and a first adjusting portion 111 . The first adjustment part 111 is configured to adjust its position on the fixed structure 3 , and when the first adjustment part 111 is installed on the fixed structure 3 , the first holding part 110 holds the front end 21 . In a feasible embodiment, the first adjustment part 111 is configured to adjust the position of the first adjustment part 111 disposed on the fixing structure 3 in a fourth direction D4. The fourth direction D4 is parallel or forms an acute angle with the second direction D2, so as to obtain the thrust component of the first holding part 110 parallel to the second direction D2 from one of the adjustment directions of the first adjustment part 111, so that in the second direction D2 presses the expansion card 2 against the slot 4 . Wherein, there is a turning angle between the extending direction of the first holding portion 110 and the extending direction of the first adjusting portion 111 . Further, the fourth direction D4 is parallel to the second direction D2, and the turning angle is a right angle.

As shown in FIG. 3 , in another feasible embodiment, the first holding portion 110 includes a first slot 1100 for a locking member 5 to pass through the first slot 1100 to adjust the position of the first holding portion 110 holding the front end 21 . Location. In detail, taking the first slot 1100 as an example, the first slot 1100 has a semicircular through hole at both ends and a rectangular through hole communicating with the semicircular through hole between the two ends. The length of the first slot 1100 (or the rectangular through hole) The direction is parallel or forms an acute angle with the first direction D1. However, the first slot 1100 can also be a rectangular hole, a polygonal hole with a maximum length direction, or an oblong hole. The locking member 5 adjusts the relative position of the locking member 5 locked on the front end 21 and/or the bracket provided on the front end 21 along the length direction of the first slot hole 1100 through the first slot 1100 . That is, the height of the expansion card 2 (the first direction D1) is adapted to the height component of one of the adjustment directions of the first slots 1100 parallel to the first direction D1. Further, the length direction of the first slot 1100 is parallel to the first direction D1.

Similarly, the first adjusting portion 111 includes a second slot 1110 for a locking member 5 to pass through the second slot 1110 to adjust the position of the first adjusting portion 111 disposed on the fixing structure 3 . Wherein, the shape of the second slot 1110 is similar to that of the first slot 1100 . Therefore, the locking member 5 adjusts the position of the locking member 5 locked on the fixing structure 3 along the length direction of the second slot 1110 through the second slot 1110 . That is, the length component of one of the adjustment directions of the various second slots 1110 parallel to the second direction D2 adapts to the length of the expansion card 2 (the second direction D2). Further, the length direction of the second slot 1110 is parallel to the second direction D2.

In a feasible embodiment, as shown in FIG. 4 , the fixed structure 3 further includes a bridge plate 33, which includes a first opening 330 connecting the two opposite surfaces of the bridge plate 33, and the top 22 is located between the first opening 330 and the first opening 330. between the slots 41 for the second holding unit 120 to press against the top 22 through the first opening 330 . The bridge plate 33 is disposed on the fixed structure 3 such as the frame 31 . In this example, the opposite sides of the bridge plate 33 are arranged on the two frames of the frame 31 on the opposite sides of the expansion card 2, so that the top 22 is located between the slot 4 and the first opening 330, so as to be held by the second The unit 120 is pressed against the top 22 through the first opening 330 .

Further, the second adjustment unit 121 includes a first plate 1211 and a second plate 1212 connected by a first turning portion 1210, and a third plate 1214 and a second plate 1213 connected by a second turning portion 1213. The fourth plate 1215 . The first plate 1211 and the third plate 1214 each include a third slot 12110, and the two third slots 12110 are located on opposite sides of the first opening 330 and parallel to each other, so that the two locking members 5 can pass through the two third slots. The slot 12110 adjusts the position of the second adjusting unit 121 locked on the bridge plate 33 . The second plate 1212 and the fourth plate 1215 each include a fourth slot 12111, and the two fourth slots 12111 are parallel to each other, so that the other two locking members 5 can adjust the second holding unit 120 through the two fourth slots 12111. The position of pressing against the top 22 through the first opening 330 .

Please refer to Fig. 4 again, in detail, the shape of the third slot 12110 is similar to the shape of the first slot 1100, and the length direction (eighth direction D8) of the third slot 12110 is parallel to the second direction D2 or at an acute angle. Therefore, the position where the second holding unit 120 presses against the top 22 is adjusted by the length component of one of the adjustment directions of the various third slots 12110 parallel to the second direction D2. Further, the length direction (the eighth direction D8 ) of the third slot 12110 is parallel to the second direction D2 .

Further, please refer to FIG. 4 and FIG. 5 , FIG. 5 is a schematic cross-sectional view along line AA' of FIG. 4 . The second holding unit 120 is a box with an opening or a U-shaped structure. The opposite ends of the bottom surface 1201 of the second holding unit 120 are respectively connected to the two side surfaces 1202 of the second holding unit 120, and the two sides 1202 each include a Perforation 1203. The shape of the fourth slot 12111 is similar to the shape of the first slot 1100, so that the locking member 5 can pass through the fourth slot 12111 and adjust the locking member 5 to lock along the length direction of the fourth slot 12111 (the fifth direction D5). at the position of perforation 1203. The fifth direction D5 is parallel to or forms an acute angle with the first direction D1. Therefore, the height component of one of the adjustment directions of the fourth slots 12111 parallel to the first direction D1 adapts to the height of the expansion card 2 (the first direction D1 ). That is, adjust the position where the bottom surface 1201 presses against the top 22 to accommodate various possibilities of the top 22 being at different heights (the first direction D1 ) after being inserted into the slot 4 . Furthermore, the length direction (fifth direction D5 ) of the fourth slot 12111 is parallel to the first direction D1 .

Optionally, the multi-axis adjustable holding system 1 for expansion cards of the present invention further includes a first buffer unit 6 . As shown in FIG. 5 , the first buffer unit 6 is disposed on the second holding unit 120 such that the first buffer unit 6 is located between the second holding unit 120 and the top 22 . For example, the material of the first buffer unit 6 is any one of the following: rubber, foam, resin, plastic, cork, silicone, or a combination of at least two of them (such as overlapping sheets of different materials, braided structures, etc.) . Furthermore, the first buffer unit 6 is disposed on the bottom surface 1201 , so that when the bottom surface 1201 is pressed against the top 22 , the first buffer unit 6 can prevent the top 22 from being crushed.

In a feasible embodiment, as shown in Fig. 6 and Fig. 7, Fig. 7 is a schematic cross-sectional view along line BB' of Fig. 6 . The bridge plate 33 further includes two fifth slots 331 communicating with two opposite surfaces of the bridge plate. The third holding portion 130 and the fourth holding portion 140 respectively pass through a fifth slot 331 correspondingly, so that the first side 23 and the second side 24 are located between the third holding portion 130 and the fourth holding portion 140 for adjustment The distance between the third holding portion 130 and the first side 23 and between the fourth holding portion 140 and the second side 24 . Both the third adjusting portion 131 and the fourth adjusting portion 141 further include a sixth slot 1310 for a locking member 5 to pass through the second sixth slot 1310 to adjust the third holding portion 130 and the fourth holding portion 140 to hold the first side surface 23 and the position of the second side 24. The locking member 5 is locked to the bridge plate 33 through the second and sixth slots 1310 . It should be noted that the positions of the third holder 13 and the fourth holder 14 are interchangeable.

In detail, the third holding portion 130 is connected to the third adjusting portion 131 by a turning portion, and the fourth holding portion 140 is connected to the fourth adjusting portion 141 by another turning portion. The third holding portion 130 and the fourth holding portion 140 are individually adjusted in a sixth direction D6 corresponding to a fifth slot 331 to hold the expansion card 22 between the third holding portion 130 and the fourth holding portion 140 between. The shape of the fifth slot 331 is rectangular or similar to that of the first slot 1100 , and the sixth direction D6 and the third direction D3 are parallel or form an acute angle. In this way, the third holding portion 130 and the fourth holding portion 140 are adapted to the width (third direction D3) and/or side of the expansion card 2 by the width component of one of the adjustment directions of the sixth slot 1310 parallel to the third direction D3. contour. Further, the sixth direction D6 is parallel to the third direction D3.

As shown in FIG. 6 , and please refer to FIG. 7 , the third adjusting portion 131 and the fourth adjusting portion 141 overlap each other, and the sixth slot 1310 of the two also at least partially overlaps, and the shape of the sixth slot 1310 is similar to that of the first The shape of a slot 1100 is for the locking member 5 to pass through the second and sixth slots 1310 and the through hole or slot of the bridge plate 33 to be locked to the bridge plate 33 .

Optionally, the multi-axis adjustable holding system 1 for expansion cards of the present invention further includes at least one second buffer unit 7 . The second buffer unit 7 is disposed on one of the third holding portion 130 and the fourth holding portion 140, so that the second buffer unit 7 is located between the third holding portion 130 and the first side 23, or the second buffer unit 7 Located between the fourth holding portion 140 and the second side 24 .

For example, the material of the second buffer unit 7 is any of the following: rubber, foam, resin, plastic, cork, silicone, or a combination of at least two of them (for example, overlapping sheets of different materials, braided structures, etc.) . Furthermore, the second buffer unit 7 prevents the first side 23 or the second side 24 from being crushed when the third holding portion 130 or the fourth holding portion 140 holds the expansion card 2 . Reasonably, the two second buffer units 7 can be individually disposed on the third holding portion 130 and the fourth holding portion 140 .

Please return to FIG. 6 , the multi-axis adjustable holding system 1 for expansion cards of the present invention further includes a third adjusting member 15 . And the third adjuster 15 includes two seventh slots 150 parallel to each other and at least one second opening 151, and the bridge plate 33 further includes an eighth slot 332 connecting the opposite two board surfaces of the bridge plate, and the third holding portion 130 and the fourth holding portion 140 respectively pass through a fifth slot 331 through the second opening 151, and the length directions of the two seventh slots 150 and the eighth slot 332 are parallel to each other, wherein the third holding portion 130 and the fourth In the case where the holding part 140 individually holds the first side 23 and the second side 24, the second and seventh slots 150 are used for the other two locking members 5 to adjust the position of the third adjustment member 15 locked on the bridge plate 33, while the eighth slot 332 for the locking member 5 to pass through the second and sixth slots 1310 , the through hole or the second opening 151 of the third adjustment member 15 , and the eighth slot 332 to be locked to the bridge plate 33 in sequence.

In detail, the shape of the seventh slot 150 and the eighth slot 332 is similar to the shape of the first slot 1100, and the length direction of the seventh slot 150, the second opening 151 and the eighth slot 332 (the seventh The direction D7) is parallel or forms an acute angle with the second direction D2. Therefore, the length component of one of the adjustment directions of the various seventh slots 150 parallel to the second direction D2 adapts to the length of the expansion card 2 (the second direction D2 ). Further, the seventh direction D7 is parallel to the second direction D2.

Reasonably, when the third adjustment member 15 is stacked on the bridge plate 33, at least one second opening 151 is located on the fifth slot 331, so that the third holding portion 130 and the fourth holding portion 140 can be opened from the second opening in sequence. 151 and the fifth slotted hole 331 and pass through. In addition, when the second and seventh slots 150 are used by the other two locking members 5 to adjust the position of the third adjusting member 15 locked on the bridge plate 33, the other locking member 5 also moves along the parallel eighth slot 332, so as to adjust the position of the third adjustment member 15 on the bridge plate 33. When the third holding part 130 and the fourth holding part 140 clamp the expansion card 22, the other locking member 5 passes through the second and sixth slot holes 1310, the through hole of the third adjusting member 15 or the second opening 151, and the eighth slot in sequence. The hole 332 is locked to the bridge plate 33 .

The above is only one of the preferred embodiments of the present invention, and is not used to limit the scope of the present invention, that is, all changes and equal changes made according to the shape, structure, characteristics and spirit described in the patent scope of the present invention Modifications should be included in the patent application scope of the present invention.

1: Multi-axis adjustable holding system 11: The first holder 110: the first holding part 1100: the first slot 111: First Adjustment Department 1110: Second slot 12: Second holder 120: the second holding unit 1201: Bottom 1202: side 1203: perforation 121: Second adjustment unit 1210: The first turning point 1211: The first board 12110: The third slot 12111: The fourth slot 1212: The second board 1213: The second turning point 1214: The third board 1215: The fourth board 13: The third holder 131: The third adjustment department 130: The third holding part 1310: The sixth slot 14: The fourth holder 140: The fourth holding part 141: Fourth Adjustment Department 15: The third adjustment piece 150: Seventh slot 151: second opening 2: expansion card 20: Connector 20a: Bottom 21: front end 22: top 23: First side 24: Second side 3: fixed structure 30: Set up space 31: Rack 32: Chassis 33: bridge plate 330: first opening 331: Fifth slot 332: Eighth slot 4: Circuit board 41: slot 5: Locking piece 6: The first buffer unit 7: The second buffer unit AA': line BB': line D1: the first direction D2: Second direction D3: Third direction D4: the fourth direction D5: fifth direction D6: Sixth direction D7: the seventh direction D8: Eighth direction

[ FIG. 1 ] is a schematic diagram of the multi-axis adjustable holding system for expansion cards of the present invention.

[ FIG. 2 ] is a schematic exploded view of the multi-axis adjustable holding system for expansion cards of the present invention.

[ FIG. 3 ] is an enlarged schematic view of the first holding member of the multi-axis adjustable holding system for expansion cards of the present invention.

[ FIG. 4 ] is an enlarged schematic view of the second holder of the multi-axis adjustable holder system for expansion cards of the present invention.

[ FIG. 5 ] is a cross-sectional side view of the second holder of the multi-axis adjustable holder system for expansion cards of the present invention.

[ FIG. 6 ] is a top view of the second holder of the multi-axis adjustable holder system for expansion cards of the present invention.

[ FIG. 7 ] is a sectional side view of the third holder of the multi-axis adjustable holder system for expansion cards of the present invention.

1: Multi-axis adjustable holding system

11: The first holder

110: the first holding part

111: First Adjustment Department

12: Second holder

13: The third holder

14: The fourth holder

15: The third adjustment piece

2: expansion card

20: Connector

20a: Bottom

21: front end

22: top

23: First side

24: Second side

3: fixed structure

30: Set up space

33: bridge plate

4: Circuit board

41: slot

5: Locking piece

Claims (10)

A multi-axis adjustable holding system for expansion cards, suitable for holding an expansion card including a connector, wherein the expansion card is inserted into a slot of a circuit board with the connector, the expansion card further includes A bottom of the connector, a top opposite to the bottom, two ends of a front end are respectively connected to the bottom and the top, and two sides of the top and the bottom are connected and opposite to a first side and a second Sideways, this multi-axis adjustable retention system for expansion cards includes: a fixed structure, at least a part of the expansion card is arranged in an installation space defined by the fixed structure, and the slot is located in the installation space; A first retainer, including a first retaining portion and a first adjustment portion, wherein the first adjustment portion is configured to adjust its position on the fixed structure, and when the first adjustment portion is disposed on the fixed structure the first holding portion holds the front end; A second holding member, including a second holding unit and a second adjusting unit, the second adjusting unit is configured to adjust the position where the second holding unit holds the top, and the second adjusting unit is arranged on the fixing structure when the second holding unit holds the top; and A third holding part and a fourth holding part, the third holding part includes a third holding part and a third adjusting part, the fourth holding part includes a fourth holding part and a fourth adjusting part, the first The third adjusting part and the fourth adjusting part are configured to adjust the position of the third holding part and the fourth holding part respectively holding the first side and the second side, and the third adjusting part and the fourth adjusting The third holding part and the fourth holding part respectively hold the first side and the second side when the part is fixed to the fixing structure. The multi-axis adjustable holding system for expansion cards as described in claim 1, wherein the first holding portion includes a first slot for a locking member to pass through the first slot to adjust the holding of the first holding portion The location of the frontend. The multi-axis adjustable holding system for expansion cards as claimed in item 1, wherein the first adjustment part includes a second slot for a locking member to pass through the second slot to adjust the setting of the first adjustment part at the position of the fixed structure. The multi-axis adjustable holding system for expansion cards as described in claim 1, wherein the fixing structure further includes a bridge plate, including a first opening communicating with two opposite plate surfaces of the bridge plate, and the top is located on the second plate surface Between an opening and the slot, for the second holding unit to press against the top through the first opening. The multi-axis adjustable holding system for expansion cards as described in claim 4, wherein the second adjustment unit includes a first plate and a second plate connected by a first turning portion, and a second A third plate and a fourth plate connected by the turning portion, each of the first plate and the third plate includes a third slot, and the two third slots are located on opposite sides of the first opening And parallel to each other, so that the two locking pieces can adjust the position of the second adjustment unit locked on the bridge plate through the two third slots, and the second plate and the fourth plate each include a fourth The two fourth slots are parallel to each other, so that the other two locking pieces can respectively pass through the two fourth slots to adjust the position where the second holding unit presses against the top through the first opening. The multi-axis adjustable holding system for expansion cards as described in claim 4, wherein the bridge plate further includes two fifth slots connecting the two opposite surfaces of the bridge plate for the third holding portion and the The fourth holding part respectively passes through one of the fifth slots, so that the first side and the second side are located between the third holding part and the fourth holding part, and the third holding part and the fourth holding part can be adjusted. The distance between the first side and the fourth holding portion and the second side, the third adjusting portion and the fourth adjusting portion further include a sixth slot for a locking member to pass through the second The six slots adjust the positions of the third holding portion and the fourth holding portion holding the first side and the second side, and the locking member is locked to the bridge plate through the two sixth slots. The multi-axis adjustable holding system for expansion cards as described in claim 6 further includes a third adjustment member, including two seventh slots parallel to each other and at least one second opening, and the bridge plate further includes communication An eighth slot on the opposite two plate surfaces of the bridge plate, the third holding portion and the fourth holding portion respectively pass through the fifth slot through the second opening, the two seventh slots and the second opening respectively The length directions of the eight slots are parallel to each other, and when the third holding part and the fourth holding part respectively hold the first side and the second side, the two seventh slots are used by the other two locking members to adjust the third side. The position of the adjustment piece is locked on the bridge plate, and the eighth slot allows the locking piece to pass through the second sixth slot and the eighth slot to be locked on the bridge plate in sequence. The multi-axis adjustable holding system for expansion cards as described in claim 1 further includes a first buffer unit arranged on the second holding unit so that the first buffer unit is located between the second holding unit and the second holding unit between the tops. The multi-axis adjustable holding system for expansion cards as described in claim 1 further includes at least one second buffer unit, which is arranged on one of the third holding part and the fourth holding part, so that the second The buffer unit is located between the third holding portion and the first side, or the second buffer unit is located between the fourth holding portion and the second side. The multi-axis adjustable holding system for expansion cards according to claim 1, wherein the fixing structure is any one of the following: a rack, a case, or a combination of a rack and a case.

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