CN214011863U

CN214011863U - Display card fixing device

Info

Publication number: CN214011863U
Application number: CN202022722016.7U
Authority: CN
Inventors: 唐恒亮; 尹棋正; 薛菲; 曹阳
Original assignee: Beijing Wuzi University
Current assignee: Beijing Wuzi University
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-08-20
Anticipated expiration: 2030-11-23

Abstract

The embodiment of the utility model provides a display card fixing device, which comprises a fixed frame, a connecting rod connected with the top of the fixed frame, and a mounting plate connected with the top end of the connecting rod; the fixed frame is a quadrilateral structure which is arranged in the vertical direction and is formed by sequentially connecting an upper cross beam, a side beam on the left side, a bottom beam and a side beam on the right side; the horizontally placed display card is connected to the hollow position in the middle of the fixed frame; the inner side surface of the bottom beam supports the bottom surface of the other end of the display card opposite to the slot end, and two side surfaces of the display card are connected to the inner side surfaces of the two side beams; the surface of the mounting plate is parallel to the horizontal plane. This technical scheme adopts the suspension type support to support the free end of display card, and its fixed respond well has avoided the easy deformation of display card non-support or production when adopting the bottom sprag or even the problem of damaging.

Description

Display card fixing device

Technical Field

The utility model relates to a computer manufacturing technology field, concretely relates to display card fixing device.

Background

The display card is image processing hardware equipment of a computer, is arranged in a PCI-E slot of a mainboard, and has an interface end fixed with a case by a screw and the other end suspended in the case. With the development of science and technology, the performance of the display card is stronger and more important.

In the process of implementing the present invention, the inventor finds that there are at least the following problems in the prior art:

along with the reinforcing of performance, the weight and the volume of display card also increase thereupon, under traditional mounting means, display card suspension end produces obvious deformation gradually because self weight, seriously influences the display card outward appearance, can cause the solder joint on the PCB board to break away from when warping to a certain extent and cause the damage of display card. In addition, when the host is carried or vibrated, the connection between the display card and the main board is affected, and meanwhile, local stress concentration is caused, so that the host is more easily damaged.

In the prior art, display card fixing supports with various structures are used for solving the problems, but the existing typical display card fixing supports (CN201921701397.1, a computer display card support; CN202020220739.4, a display card support for a desktop computer, CN201721547530.3, a display card support) all adopt a bottom supporting structure, but the bottom supporting structure has obvious defects: the display card is usually arranged below the case, and the installation is difficult due to the narrow space at the bottom of the display card, so that the installation quality is difficult to ensure. These methods are not effective in solving the problem.

Therefore, how to effectively fix the display card and eliminate the hidden trouble of deformation and even damage of the display card is a problem to be solved.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a display card fixing device has solved the problem that the display card can not reliably be fixed among the prior art, warp and damage easily.

In order to achieve the above object, an embodiment of the present invention provides a graphics card fixing device, which includes a fixing frame, a connecting rod connected to a top of the fixing frame, and a mounting plate connected to a top end of the connecting rod, wherein the mounting plate is used for connecting an inner side surface of a top plate of a chassis;

the fixed frame comprises a quadrangular hollow structure which is arranged in the vertical direction and is formed by sequentially connecting an upper cross beam, a side beam positioned on the left side, a bottom beam and a side beam positioned on the right side;

one end of a horizontally placed display card is inserted on the main board, and the other end of the horizontally placed display card is placed on the inner side surface of the bottom beam; two side surfaces of the display card are respectively connected to the inner side surfaces of the two side beams;

the surface of the mounting plate is parallel to the horizontal plane.

Further, the side beam is divided into a side beam upper part and a side beam lower part, and the side beam upper part and the side beam lower part are connected through a buffer structure.

Further, a first through hole which is vertically arranged is formed in the upper surface of the lower portion of the side beam, and a first mounting groove communicated with the first through hole is formed below the first through hole; the caliber of the first through hole is smaller than that of the first mounting groove;

the buffer structure comprises a buffer connecting rod, a buffer spring and a first nut; one end of the buffer connecting rod is provided with a first boss, the other end of the buffer connecting rod is provided with a first thread, one end provided with the first boss is fixed at the upper part of the side beam, and one end provided with the first thread penetrates through the first through hole and extends into the first mounting groove; the buffer spring is arranged in the first mounting groove and sleeved outside the threaded end of the buffer connecting rod; the first nut is screwed at the tail end of the threaded end of the buffer connecting rod.

Further, the floorbar is divided into a floorbar left part and a floorbar right part, and the floorbar left part and the floorbar right part are connected through an adjusting clamping structure.

Furthermore, a second through hole which is horizontally arranged is formed in the left side surface of the right part of the bottom beam, and a second mounting groove communicated with the second through hole is formed in the right side of the second through hole; the caliber of the second through hole is smaller than that of the second mounting groove;

the adjusting and clamping structure comprises an adjusting connecting rod, an adjusting spring and a second nut; one end of the adjusting connecting rod is provided with a second boss, the other end of the adjusting connecting rod is provided with a second thread, one end provided with the second boss is fixed at the left part of the bottom beam, and one end provided with the second thread penetrates through the second through hole to extend into the second mounting groove; the adjusting spring is arranged in the second mounting groove and sleeved outside the threaded end of the adjusting connecting rod; the second nut is screwed at the tail end of the threaded end of the adjusting connecting rod.

Furthermore, the upper cross beam is a round rod, one end of the round rod is provided with a third boss, the other end of the round rod is provided with a third thread, the upper parts of the side beams are provided with third through holes which are horizontally arranged, and the upper cross beam sequentially penetrates through the third through holes in the upper parts of the left side beam and the right side beam and is fixed by screwing a third nut.

Further, the lower part of the side beam on the left side and the left part of the bottom beam are of an integrated structure; the lower part of the side beam on the right side and the right part of the bottom beam are of an integrated structure.

Furthermore, the connecting rod comprises a sleeve and a telescopic rod positioned below the sleeve, the outer diameter of the telescopic rod is smaller than the inner diameter of the sleeve, and the upper end of the telescopic rod extends into the sleeve; the bottom of the sleeve is provided with external threads and an opening arranged along the length direction of the sleeve; and a locking nut matched with the external thread is further arranged on the outer side of the sleeve.

Furthermore, a plurality of fourth through holes are formed in the mounting plate; the mounting plate is connected with the inner side surface of the top plate of the case in a gluing or threaded connection mode; and rubber pads are arranged on the inner side surfaces of the bottom beam and the two side beams.

Furthermore, a fifth through hole in the horizontal direction is formed in the middle of the upper cross beam; the bottom of the telescopic rod is provided with a connecting screw arranged in the horizontal direction; the fixed frame is in threaded connection with the telescopic rod through the fifth through hole.

The technical scheme has the following beneficial effects:

the suspension type fixing scheme is innovative, the fixing effect is good, the suspension section of the display card is effectively supported, and the problem that the display card is easy to deform or even damage when the display card is not supported or bottom support is adopted is avoided.

Meanwhile, the technical scheme also has the following characteristics:

1. the side beam of the fixed frame is provided with a buffer structure, so that the display card fixing device has a damping function, and the impact on the display card when the host machine is vibrated is effectively reduced.

2. The display card fixing device has the advantages that universality is high, the fixing frame is provided with the adjusting clamping mechanism capable of adjusting the left width and the right width, and the connecting rod is provided with the telescopic rod capable of adjusting the height position, so that the display card fixing device can be suitable for display cards of different sizes and models.

3. The installation is convenient, the adjustment is easy. The top side of the inner part of the case is connected, so that the mounting space is large and the mounting quality is effectively ensured; meanwhile, the fixing device can be flexibly fixed in various modes such as bonding or threaded connection.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a display card fixing device and a display card according to an embodiment of the present invention;

fig. 2 is a schematic view of a connection relationship between a display card fixing device and a display card according to the present invention;

fig. 3 is a partial schematic view of a buffering structure in a graphics card fixing device according to the present invention;

fig. 4 is a partial schematic view of an adjusting clamping structure of a graphics card fixing device according to the present invention;

fig. 5 is a partial schematic view of a mounting plate in a graphics card fixing device according to the present invention;

FIG. 6 is a schematic view of the buffering structure and the adjusting clamp of the graphics card fixing device of the present invention in an initial state;

reference numerals: 1. a display card; 2, a main board; 10. mounting a plate; 11. a fourth via hole; 20. a connecting rod; 21. a sleeve; 22. A telescopic rod; 23. locking the nut; 24. an opening; 25. a connecting screw; 30. a fixed frame; 31. an upper cross beam; 32. a side beam; 32-1, side sill upper portions; 32-2, lower part of side beam; 32-3, a first mounting groove; 32-4, a first through hole; 33. a bottom beam; 33-1, the left part of the bottom beam; 33-2, the right part of the bottom beam; 33-3, a second mounting groove; 33-4, a second through hole; 34. a third nut; 35. A fifth through hole; 36. a rubber pad; 41. a buffer connecting rod; 42. a buffer spring; 43. a first nut; 51. adjusting the connecting rod; 52. adjusting the spring; 53. a second nut.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, the utility model provides a graphics card fixing device, which comprises a fixing frame 30, a connecting rod 20 connected to the top of the fixing frame 30, and a mounting plate 10 connected to the top end of the connecting rod 20, wherein the mounting plate 10 is used for connecting the inner side surface of the top plate of a chassis;

the fixed frame 30 comprises a quadrangular hollow structure which is arranged in the vertical direction and is formed by sequentially connecting an upper cross beam 31, a side beam 32 positioned on the left side, a bottom beam 33 and the side beam 32 positioned on the right side;

one end of a horizontally placed display card 1 is inserted on the main board 2, and the other end is placed on the inner side surface of the bottom beam 33; two side surfaces of the display card 1 are respectively connected to the inner side surfaces of the two side beams 32;

the plate surface of the mounting plate 10 is parallel to the horizontal plane.

In the prior art, a bottom supporting type fixing device exists, but the structural characteristics of the device determine that the mounting space is limited, the mounting is difficult, and the stress of a display card is uneven, so that the problem solving effect is not good. Meanwhile, the bottom supporting structure brings the problems of influencing the normal heat dissipation of the display card and the like. In view of this, this application provides a brand-new design, adopts suspension type fixed bolster to carry out the fixed of display card, makes the mounted position of display card fixing device be located the top of quick-witted incasement, and its space is open, be convenient for installation and adjustment, can exert the effect of fixed display card well, has avoided influencing the display card heat dissipation scheduling problem simultaneously.

As shown in fig. 2, it is a schematic diagram of a connection relationship after the display card fixing device of the present technical solution is installed: the slot end of the display card is inserted in the PCI-E slot of the mainboard, and the other end of the display card is a suspension end. Because the position that the display card fixing device of this application is connected with the display card is a hollow quadrangle structure, consequently can be close to the most terminal position at the suspension end, overlap the display card fixing device in the outside of display card, hold the bottom surface of display card with above-mentioned quadrangle structure's base crossbeam, the top is connected to on the roof of quick-witted incasement side simultaneously to the realization is to the effective support of display card suspended section, eliminates the moment of flexure effect of its self weight to the slot end, thereby has avoided the deformation and the damage of display card.

Further, as shown in fig. 1, the side member 32 is divided into a side member upper portion 32-1 and a side member lower portion 32-2, and the side member upper portion 32-1 and the side member lower portion 32-2 are connected by a buffer structure.

When the host computer receives vibrations or impact, the damage probability of traditional display card can increase by a wide margin, consequently in this application, increases shock-absorbing function innovatively in display card fixing device. The elastic damping and buffering structures are additionally arranged on the left side beam and the right side beam of the fixed frame to absorb shock or impact.

Further, as shown in fig. 3, the upper surface of the lower part 32-2 of the side beam is provided with a first through hole 32-4 which is vertically arranged, and a first mounting groove 32-3 communicated with the first through hole 32-4 is arranged below the first through hole; the caliber of the first through hole 32-4 is smaller than that of the first mounting groove 32-3;

the buffer structure comprises a buffer connecting rod 41, a buffer spring 42 and a first nut 43; one end of the buffer connecting rod 41 is provided with a first boss, the other end of the buffer connecting rod is provided with a first thread, the end provided with the first boss is fixed on the side beam upper part 32-1, and the end provided with the first thread penetrates through the first through hole 32-4 and extends into the first mounting groove 32-3; the buffer spring 42 is arranged in the first mounting groove 32-3 and sleeved outside the threaded end of the buffer connecting rod 41; the first nut 43 is screwed onto the end of the threaded end of the damping connection rod 41.

In the buffer structure, the pitch diameter of the spring is larger than the aperture of the first through hole and smaller than the size of the outer contour of the first nut, so that the spring can be always positioned in the first mounting groove and cannot be separated from the first mounting groove. The first mounting groove may be a square groove or a circular groove. Each cross beam and each side beam of the fixed frame can be made of ABS engineering plastics, and the first boss end of the connecting rod made of metal materials can be embedded into the bottom end of the upper part of each side beam in the injection molding process of the upper part of each side beam. In normal working state at ordinary times, the buffer structure in the display and clamping fixing device does not work, at the moment, the spring is in an initial state after assembly, and a reasonable gap is kept between the lower part of the side beam and the upper part of the side beam, as shown in fig. 6; when the host computer produces vibrations, the suspension end of display card produces the trend of displacement from top to bottom, and the spring among the buffer begins to play a role this moment, through the compression or the extension of spring, produces the effort opposite with the displacement trend to effectively cushion, offset the impact force, avoid vibrations to the damage of display card. In the process of spring deformation, the buffer connecting rod plays a role in motion guiding all the time.

Further, as shown in fig. 1, the bottom beam 33 is divided into a bottom beam left portion 33-1 and a bottom beam right portion 33-2, and the bottom beam left portion 33-1 and the bottom beam right portion 33-2 are connected by an adjustment clamp structure.

Different display cards may have different width direction sizes, in order to be compatible with the display cards with different specifications, the bottom beam is divided into a left part and a right part, and an elastic adjusting and clamping structure is arranged between the two parts, so that the width size of the fixed frame can be adjusted within a certain range. And this structure has additional advantages: the left side surface and the right side surface of the display card can be clamped through elasticity, so that the display card can be fixed better.

Further, as shown in fig. 4, a horizontally arranged second through hole 33-4 is provided on the left side surface of the bottom beam right portion 33-2, and a second mounting groove 33-3 communicated with the second through hole 33-4 is provided on the right side thereof; the caliber of the second through hole 33-4 is smaller than the caliber of the second mounting groove 33-3;

the adjusting and clamping structure comprises an adjusting connecting rod 51, an adjusting spring 52 and a second nut 53; one end of the adjusting connecting rod 51 is provided with a second boss, the other end of the adjusting connecting rod is provided with a second thread, one end provided with the second boss is fixed at the left part 33-1 of the bottom beam, and the other end provided with the second thread penetrates through the second through hole 33-4 and extends into the second mounting groove 33-3; the adjusting spring 52 is arranged in the second mounting groove 33-3 and sleeved outside the threaded end of the adjusting connecting rod 51; the second nut 53 is screwed onto the end of the threaded end of the adjusting connecting rod 51.

The structure has a similar structure with the buffering structure, and the second boss end of the connecting rod made of metal materials can be embedded into the right end of the left part of the bottom beam in the process of injection molding of the left part of the bottom beam. The second mounting groove may be a square groove or a circular groove. When the display card is not assembled, the adjusting clamping structure does not work, the spring is in an initial state after assembly, and a minimum preset gap is kept between the left part of the bottom beam and the right part of the bottom beam, as shown in fig. 6; after the display card is placed in the fixed frame, the clamping structure can be pulled open and adjusted to a proper size, so that the gap between the left part of the bottom beam and the right part of the bottom beam is increased, the display card is placed, the hand is loosened, and the spring for adjusting the clamping structure under the action of elasticity can automatically retract a part, so that certain clamping force is generated on the left side surface and the right side surface of the display card. After the graphics card is fixed, a certain amount of clearance exists between the left part of the bottom beam and the right part of the bottom beam, and the state is shown in figure 1.

Further, the upper cross beam 31 is a round rod with a third boss at one end and a third thread at the other end, the upper side beam upper portion 32-1 is provided with a horizontally arranged third through hole, and the upper cross beam 31 sequentially passes through the third through holes on the left and right side beam upper portions 32-1 and is fixed by screwing a third nut 34.

When placing the display card, when pulling open the clearance increase of adjusting between chucking structure messenger floorbar left part and the floorbar right part, the clearance between two curb girders of top also need increase in step, just can make the display card steadily arrange, consequently in this application, when being provided with on the crossbeam of bottom and adjusting the structure, the entablature at top also need be adjusted. In order to facilitate operation and simplify the structure, the round rod is used as the upper cross beam in the technical scheme, and through holes are formed in the upper parts of the two side beams connected with the round rod, so that the round rod can slide in the through holes to adjust the width of the fixed frame. And the third boss and the third nut are respectively arranged at the outer sides of the two side beams during installation. And after the adjustment is finished, locking a third nut at the threaded end of the right end of the round rod.

Further, the lower side beam part 32-2 on the left side and the left bottom beam part 33-1 are of an integrated structure; the lower part 32-2 of the side beam on the right side and the right part 33-2 of the bottom beam are of an integrated structure.

In order to simplify the structure and facilitate the installation, the lower parts of the side beams at two sides and the bottom beams at two sides can be designed into an integrated structure respectively to form two L-shaped supporting plates which are arranged oppositely,

further, the connecting rod 20 comprises a sleeve 21 and a telescopic rod 22 positioned below the sleeve 21, the outer diameter of the telescopic rod 22 is smaller than the inner diameter of the sleeve 21, and the upper end of the telescopic rod 22 extends into the sleeve 21; the bottom of the sleeve 21 is provided with an external thread and an opening 24 arranged along the length direction of the sleeve 21; and a locking nut 23 matched with the external thread is further arranged on the outer side of the sleeve 21.

In the installation, during the telescopic link upper end inserted the sleeve pipe, adjust the display card gesture afterwards, make the connecting rod be in suitable length, then screw up lock nut on the sleeve pipe downwards, make adjustable connecting rod be in fixed state, be convenient for adjust the display card fixed height. The opening of the threaded end of the sleeve can be deformed to enable the locking nut to better perform the locking function. Simultaneously, in order to achieve better locking effect, the outer surface of the telescopic rod can be subjected to anti-skidding treatment.

Further, as shown in fig. 5, a plurality of fourth through holes 11 are provided on the mounting plate 10; the mounting plate 10 is connected with the inner side surface of the top plate of the case in a gluing or threaded connection mode; the inner side surfaces of the bottom beams 33 and the two side beams 32 are provided with rubber pads 36.

In the scheme, the mounting plate can be connected with the case by a screw through a reserved fourth through hole, and can also be fixed with the case by an adhesion mode or a magnetic attraction mode; when the threaded connection is adopted, the number of the fourth through holes is preferably 4.

Further, a fifth through hole 35 in the horizontal direction is formed in the middle of the upper cross beam 31; the bottom of the telescopic rod 22 is provided with a connecting screw 25 arranged in the horizontal direction; the fixed frame 30 is connected with the telescopic rod 22 through the fifth through hole 35.

The telescopic rod positioned below the connecting rod can be connected with the fixed frame through the reserved through hole in the middle of the upper cross beam and fastened through the connecting screw.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. To those skilled in the art; various modifications to these embodiments will be readily apparent, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A display card fixing device, comprising: the device comprises a fixed frame (30), a connecting rod (20) connected to the top of the fixed frame (30), and a mounting plate (10) connected to the top end of the connecting rod (20), wherein the mounting plate (10) is used for connecting the inner side surface of a top plate of the chassis;

the fixed frame (30) comprises a quadrangular hollow structure which is formed by sequentially connecting an upper cross beam (31), a side beam (32) positioned on the left side, a bottom beam (33) and the side beam (32) positioned on the right side in the vertical direction;

one end of a horizontally placed display card (1) is inserted on the main board (2), and the other end of the horizontally placed display card is placed on the inner side surface of the bottom beam (33); two side surfaces of the display card (1) are respectively connected to the inner side surfaces of the two side beams (32);

the plate surface of the mounting plate (10) is parallel to the horizontal plane.

2. The graphics card fixing apparatus according to claim 1, wherein the side member (32) is divided into a side member upper portion (32-1) and a side member lower portion (32-2), and the side member upper portion (32-1) and the side member lower portion (32-2) are connected by a buffer structure.

3. The graphic card fixing device according to claim 2, wherein the upper surface of the lower portion (32-2) of the side sill is provided with a first through hole (32-4) arranged vertically, and a first mounting groove (32-3) communicating with the first through hole (32-4) is provided therebelow; the caliber of the first through hole (32-4) is smaller than that of the first mounting groove (32-3);

the buffer structure comprises a buffer connecting rod (41), a buffer spring (42) and a first nut (43); one end of the buffer connecting rod (41) is provided with a first boss, the other end of the buffer connecting rod is provided with a first thread, one end provided with the first boss is fixed on the side beam upper part (32-1), and one end provided with the first thread penetrates through the first through hole (32-4) and extends into the first mounting groove (32-3); the buffer spring (42) is arranged in the first mounting groove (32-3) and sleeved outside the threaded end of the buffer connecting rod (41); the first nut (43) is screwed onto the end of the threaded end of the buffer connecting rod (41).

4. The graphics card fixing apparatus of claim 3, wherein the bottom beam (33) is divided into a bottom beam left portion (33-1) and a bottom beam right portion (33-2), and the bottom beam left portion (33-1) and the bottom beam right portion (33-2) are connected by an adjustment clamping structure.

5. The graphics card fixing apparatus according to claim 4, wherein the left side surface of the bottom beam right portion (33-2) is provided with a second through hole (33-4) horizontally arranged, and the right side of the second through hole (33-4) is provided with a second mounting groove (33-3) communicated therewith; the caliber of the second through hole (33-4) is smaller than that of the second mounting groove (33-3);

the adjusting and clamping structure comprises an adjusting connecting rod (51), an adjusting spring (52) and a second nut (53); one end of the adjusting connecting rod (51) is provided with a second boss, the other end of the adjusting connecting rod is provided with a second thread, one end provided with the second boss is fixed at the left part (33-1) of the bottom beam, and one end provided with the second thread penetrates through the second through hole (33-4) and extends into the second mounting groove (33-3); the adjusting spring (52) is arranged in the second mounting groove (33-3) and sleeved outside the threaded end of the adjusting connecting rod (51); the second nut (53) is screwed on the end of the threaded end of the adjusting connecting rod (51).

6. The graphics card fixing apparatus according to claim 2, wherein the upper cross member (31) is a round bar having a third boss at one end and a third thread at the other end, the side rail upper portions (32-1) are provided with third through holes arranged horizontally, and the upper cross member (31) passes through the third through holes of the left and right side rail upper portions (32-1) in sequence and is fixed by tightening a third nut (34).

7. The graphics card fixing apparatus according to claim 5, wherein the lower side sill portion (32-2) on the left side is of an integral structure with the left bottom sill portion (33-1); the lower part (32-2) of the side beam on the right side and the right part (33-2) of the bottom beam are of an integrated structure.

8. The graphics card fixing apparatus of claim 1, wherein the connection rod (20) comprises a sleeve (21) and a telescopic rod (22) located below the sleeve (21), an outer diameter of the telescopic rod (22) is smaller than an inner diameter of the sleeve (21) and an upper end of the telescopic rod (22) extends into the sleeve (21); the bottom of the sleeve (21) is provided with external threads and an opening (24) arranged along the length direction of the sleeve (21); and a locking nut (23) matched with the external thread is also arranged on the outer side of the sleeve (21).

9. The graphics card fixing apparatus according to claim 1, wherein the mounting plate (10) is provided with a plurality of fourth through holes (11); the mounting plate (10) is connected with the inner side surface of the top plate of the case in a gluing or threaded connection mode; and rubber pads (36) are arranged on the inner side surface of the bottom beam (33) and the inner side surfaces of the two side beams (32).

10. The graphics card fixing device according to claim 8, wherein a fifth through hole (35) is formed in the middle of the upper beam (31) in the horizontal direction; the bottom of the telescopic rod (22) is provided with a connecting screw (25) which is arranged in the horizontal direction; the fixed frame (30) is in threaded connection with the telescopic rod (22) through the fifth through hole (35).