Computer back cover removing jig

By designing a computer back cover removal fixture including a hinged seat, an adsorption cover plate and a driving member, the problem of low back cover removal efficiency in the prior art is solved, and efficient separation between the back cover and the display main body is achieved.

CN222289954UActive Publication Date: 2025-01-03YUSHENG ELECTRONICS(SHANGHAI) CO LTD
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Patent Information

Application Number
CN202421163265.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-24
Publication Date
2025-01-03
Estimated Expiration
2034-05-24

AI Technical Summary

Technical Problem

In the prior art, the removal efficiency of computer back cover is low and improvement is needed to improve the removal efficiency.

Method used

A computer back cover removal fixture is designed, including a substrate, a positioning base mold, a body fixing device and a removal device. The removal device uses the hinge seat, adsorption cover plate and front and rear drive members to achieve flexible removal of the back cover by using suction cups and spring mechanisms, including the flip of the adsorption cover plate and the sliding of the drive members, and removes the horizontal and vertical sliding of the back cover. Move the freedom to achieve complete separation of the back cover and the display main body.

Benefits of technology

It effectively improves the removal efficiency of the back cover, simplifies the separation process between the back cover and the display main body, and improves the removal efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of computer back cover removing devices, in particular to a computer back cover removing jig which comprises a base plate, a positioning bottom die arranged on the base plate and used for positioning and placing a display screen, a main body fixing device arranged on the base plate and used for fixing a display screen main body and a removing device arranged on the base plate and used for removing a back cover. The removing device comprises a hinge seat which is rotatably connected to the base and located on one side of the rear portion of the back cover, an adsorption cover plate which is slidably connected to the hinge seat in the front-back direction so as to adsorb the upper surface of the back cover, and a front-back driving part which is arranged on the hinge seat so as to drive the adsorption cover plate to slide front and back. And the adsorption cover plate is provided with a plurality of suckers for adsorbing the back cover. The back cover dismounting device has the effect of improving the dismounting efficiency of the back cover.
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Description

Technical Field

[0001] The present application relates to the technical field of computer back cover removal devices, and in particular to a computer back cover removal jig. Background Art

[0002] Reference Figure 6 , Figure 7 A computer display screen includes a display screen body 10 and a back cover 20 covering the display screen body 10. A front buckle is provided between the back cover 20 and the front portion of the display screen body 10. The front buckle includes an elastic buckle 201 fixedly connected to the inner wall of the back cover 20 and a front plug-in column 101 fixedly connected to the inner wall of the display screen body 10. The front plug-in column 101 is inserted and embedded in the elastic buckle 201 to limit the horizontal sliding freedom of the back cover 20. The back cover 20 and the display screen body 1 0 is provided with a rear claw, the rear claw includes a limiting piece 202 fixedly connected to the inner wall of the back cover 20 and a rear clamping column 102 fixedly connected to the inner wall of the display screen body 10, a clamping slot is provided on one side of the limiting piece 202, the limiting piece 202 slides along the front and rear directions to clamp the rear clamping column 102, the upper part of the rear clamping column 102 protrudes with an anti-slip convex part 103 abutting against the upper end surface of the limiting piece 202, and the rear clamping column 102 is clamped in the clamping slot to limit the vertical sliding freedom of the back cover 20.

[0003] When the computer display needs to be repaired, the back cover needs to be removed. Currently, the back cover is removed manually, and the removal efficiency of the back cover is low, so further improvement is needed. Utility Model Content

[0004] In order to improve the efficiency of removing the back cover, the present application provides a computer back cover removal jig.

[0005] The computer back cover removal jig provided in this application adopts the following technical solution:

[0006] A computer back cover removal jig comprises a base plate, a positioning bottom mold arranged on the base plate for positioning a display screen, a main body fixing device arranged on the base plate for fixing the display screen main body, and a removal device arranged on the base plate for removing the back cover, wherein the removal device comprises a hinge seat rotatably connected to the base and located on one side of the rear portion of the back cover, an adsorption cover plate slidably connected to the hinge seat along the front-rear direction for adsorbing the upper surface of the back cover, and a front-rear driving member arranged on the hinge seat for driving the adsorption cover plate to slide back and forth, and the adsorption cover plate is provided with a plurality of suction cups for adsorbing the back cover.

[0007] By adopting the above technical scheme, under normal circumstances, the adsorption cover is rotated to a vertical state, which is convenient for placing the display screen on the positioning bottom mold, and the display screen body is fixed by the main body fixing device, and then the adsorption cover is flipped to a horizontal state, so that the suction cup on the adsorption cover is adsorbed and fixed to the back cover, and then the free end of the adsorption cover is flipped upward. In the process of flipping the free end of the adsorption cover upward, the front end of the back cover is first warped, so that the elastic buckle slides vertically and disengages from the front plug-in column, thereby releasing the horizontal sliding freedom of the back cover, and then, the adsorption cover is driven to slide relative to the hinge seat by the front and rear drive parts, thereby driving the back cover to slide forward a short distance, so that the rear card column slides out of the card slot of the limit plate, releasing the limit on the back cover, and the adsorption cover continues to flip, so as to achieve complete separation of the back cover and the display screen body, effectively improving the removal efficiency of the back cover.

[0008] Preferably, the removal device also includes an upward flipping driving mechanism for driving the free end of the adsorption cover plate to flip upward, the upward flipping driving mechanism includes a cam guide block fixedly connected to the base plate and located on one side of the front of the back cover, a cam fixing block movably connected to the cam guide block and fixedly connected to the free end of the adsorption cover plate, a push block connected to the base plate and abutting the cam fixing block along a horizontal sliding movement, and a removal driving member driving the push block to slide, the push block has a guide surface for the cam fixing block to abut against to force the cam fixing block to move upward, the cam fixing block is protrudingly provided with a limit rod, the cam guide block is provided with an arc groove for the limit rod to slide and an inclined groove connected to the upper part of the arc groove, the upper part of the inclined groove is inclined toward the front end of the back cover and extends to the upper end surface of the cam guide block, and the front and rear driving members are forward push springs arranged on the hinge seat.

[0009] By adopting the above technical solution, when the adsorption cover is folded to a horizontal state, the limit rod on the cam fixing block slides into the lower end of the arc groove. At this time, the front push spring is in a compressed state and has elastic potential energy. After the suction cup on the adsorption cover is adsorbed and fixed to the back cover, the push block is driven to slide toward the cam fixing block by removing the driving member, so that the guide surface of the push block abuts against the lower end surface of the cam fixing block. When the push block continues to advance, the cam fixing block is forced to move upward, so that the limit rod slides along the arc groove, thereby driving the adsorption. The free end of the cover plate flips over, and when the limit rod slides to the upper part of the arc groove and enters the inclined groove, the front end of the back cover warps, causing the elastic buckle to slide vertically and disengage from the front plug-in column, thereby releasing the horizontal sliding freedom of the back cover. Subsequently, the forward push spring forces the adsorption cover plate to slide forward, thereby driving the back cover to slide forward a short distance, causing the rear card column to slide out of the card slot of the limit plate, releasing the limit on the back cover, and then manually driving the adsorption cover plate to continue to flip upward, thereby achieving complete separation of the back cover and the display screen body.

[0010] Preferably, the hinge seat includes a rotating shaft base fixedly connected to the base plate, a fixed horizontal block rotatably connected to the rotating shaft base, and a fixed vertical block fixedly connected to one side of the fixed horizontal block, the adsorption cover plate is slidably connected to the fixed horizontal block, the adsorption cover plate is fixedly connected to a connecting block, the connecting block is fixed with a connecting rod slidably passed through the fixed vertical block, the forward push spring is sleeved on the connecting rod, one end of the forward push spring abuts / fixed to the side wall of the connecting block, and the other end of the forward push spring abuts / fixed to the side wall of the fixed vertical block.

[0011] By adopting the above technical solution, a connecting rod is added to provide a mounting carrier for the forward push spring, thereby facilitating the installation of the forward push spring.

[0012] Preferably, the removal driving member is a forward push cylinder, a cylinder body of the forward push cylinder is fixedly connected to the base plate, and a piston rod of the forward push cylinder is fixedly connected to the push block.

[0013] By adopting the above technical solution, the sliding of the push block is achieved by the extension and retraction of the piston rod of the cylinder, the response speed of the cylinder is fast, and the removal efficiency of the back cover is improved.

[0014] Preferably, the main body fixing device comprises a pair of clamping blocks respectively located at the left and right sides of the positioning bottom mold and slidably connected to the base plate, and a clamping driving member driving the clamping blocks to slide and abut against the outer wall of the display screen body.

[0015] By adopting the above technical solution, the clamping block is driven to slide by the clamping driving member, so that the clamping block abuts against the outer wall of the display screen body, thereby achieving clamping and fixing of the display screen body.

[0016] Preferably, the clamping drive member is a clamping cylinder, a cylinder body of the clamping cylinder is fixedly connected to the base plate, and a piston rod of the clamping cylinder is fixedly connected to the clamping block.

[0017] By adopting the above technical solution, the sliding of the clamping block is achieved by the extension and retraction of the piston rod of the cylinder, the response speed of the cylinder is fast, and the fixing efficiency of the display screen body is improved.

[0018] Preferably, the upper end surface of the positioning bottom mold is provided with a positioning cavity for placing the display screen body, the bottom inner wall of the positioning cavity is provided with a plurality of adsorption holes, the positioning bottom mold has an adsorption cavity connected to the adsorption holes, and the main body fixing device includes an air pump connected to the adsorption cavity.

[0019] By adopting the above technical solution, after the display screen body is placed in the positioning cavity, the lower end of the display screen body covers the adsorption hole, and the adsorption cavity is evacuated by starting the vacuum pump, so that the display screen body is adsorbed and fixed in the positioning cavity.

[0020] In summary, the utility model has the following beneficial effects:

[0021] 1. Under normal conditions, the adsorption cover is rotated to a vertical state to facilitate placing the display screen on the positioning bottom mold, and the display screen body is fixed by the main body fixing device, and then the adsorption cover is flipped to a horizontal state so that the suction cup on the adsorption cover is adsorbed and fixed to the back cover, and then the free end of the adsorption cover is flipped upward. During the upward flipping process of the free end of the adsorption cover, the front end of the back cover is first warped, so that the elastic buckle slides vertically out of the front plug-in column, thereby releasing the horizontal sliding freedom of the back cover, and then the front and rear driving parts drive the adsorption cover to slide relative to the hinge seat, thereby driving the back cover to slide forward a short distance, so that the rear card column slides out of the card slot of the limit plate, releasing the limit on the back cover, and the adsorption cover continues to flip, so as to achieve complete separation of the back cover and the display screen body, effectively improving the removal efficiency of the back cover;

[0022] 2. When the adsorption cover is flipped to the horizontal state, the limit rod on the cam fixing block slides into the lower end of the arc groove. At this time, the forward push spring is in a compressed state with elastic potential energy. After the suction cup on the adsorption cover is adsorbed and fixed to the back cover, the driving member is removed to drive the push block to slide in the direction close to the cam fixing block, so that the guide surface of the push block abuts against the lower end surface of the cam fixing block. During the continuous advancement of the push block, the cam fixing block is forced to move up, thereby causing the limit rod to slide along the arc groove, thereby driving the free end of the adsorption cover to flip over. When the limit rod slides to the upper part of the arc groove and enters the inclined groove, the front end of the back cover is warped, thereby causing the elastic buckle to slide vertically and disengage from the front plug-in column, thereby releasing the horizontal sliding freedom of the back cover. Subsequently, the forward push spring forces the adsorption cover to slide forward, thereby driving the back cover to slide forward a short distance, thereby causing the rear card column to slide out of the card slot of the limit plate, releasing the limit on the back cover, and then manually driving the adsorption cover to continue to flip upward, thereby achieving complete separation of the back cover and the display screen body.

[0023] 3. After the display screen body is placed in the positioning cavity, the lower end of the display screen body is covered with the adsorption hole, and the adsorption cavity is evacuated by starting the vacuum pump, so that the display screen body is adsorbed and fixed in the positioning cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of a computer back cover removal jig in Example 1;

[0025] Figure 2 is a structural schematic diagram of the positioning bottom mold in Example 1;

[0026] Figure 3 is a schematic structural diagram of the hinge seat in Example 1;

[0027] Figure 4 is a schematic structural diagram of the adsorption cover plate in Example 1;

[0028] Figure 5is a structural schematic diagram of the positioning bottom mold in Example 2;

[0029] Figure 6 It is a schematic diagram of the structure of a display screen main body and a back cover in the prior art;

[0030] Figure 7 It is a structural schematic diagram of the front buckle and the rear claw in the prior art.

[0031] In the figure, 10, display screen body; 101, front plug column; 102, rear clamping column; 103, anti-drop convex part; 20, back cover; 201, elastic buckle; 202, limit plate; 1, substrate; 2, positioning bottom mold; 21, positioning cavity; 22, adsorption cavity; 23, adsorption hole; 3, main body fixing device; 31, clamping block; 32, clamping cylinder; 4, removal device; 41, hinge seat; 411, shaft base; 41 2. Fixed horizontal block; 413. Fixed vertical block; 414. Connecting rod; 42. Adsorption cover plate; 421. Connecting block; 422. Suction cup; 423. Handle; 43. Forward push spring; 44. Upturn drive mechanism; 441. Cam guide block; 4411. Arc groove; 4412. Inclined groove; 442. Cam fixing block; 4421. Limiting rod; 443. Push block; 4431. Guide surface; 444. Forward push cylinder. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-7 This application is described in further detail.

[0033] Embodiment 1:

[0034] The present application embodiment discloses a computer back cover removal jig, referring to Figure 1 , including a substrate 1, a positioning bottom mold 2 fixedly connected to the upper end surface of the substrate 1 for positioning the display screen, a main body fixing device 3 arranged on the substrate 1 to fix the display screen main body 10, and a removal device 4 arranged on the substrate 1 to remove the back cover 20.

[0035] Reference Figure 1 , Figure 2 The upper end surface of the positioning bottom mold 2 is provided with a positioning cavity 21 for placing the display screen body 10. After the display screen body 10 is placed in the positioning cavity 21, the upper end surface of the display screen body 10 protrudes from the upper end surface of the positioning bottom mold 2. The main body fixing device 3 includes a pair of clamping blocks 31 respectively located on the left and right sides of the positioning bottom mold 2 and connected to the upper end surface of the substrate 1 in a sliding manner along the left and right directions, and a clamping driving member driving the clamping blocks 31 to slide against the outer wall of the display screen body 10. The clamping driving member is a clamping cylinder 32, the cylinder body of the clamping cylinder 32 is fixedly connected to the upper end surface of the substrate 1, and the piston rod of the clamping cylinder 32 is fixedly connected to the outer wall of the clamping block 31.

[0036] Reference Figure 1 The removal device 4 includes a hinge seat 41 rotatably connected to the base and located on one side of the rear portion of the back cover 20, an adsorption cover plate 42 slidably connected to the hinge seat 41 along the front-to-back direction to adsorb the upper surface of the back cover 20, a front-to-rear driving member arranged on the hinge seat 41 to drive the adsorption cover plate 42 to slide back and forth, and an upward flipping driving mechanism 44 that drives the free end of the adsorption cover plate 42 to flip upward.

[0037] Reference Figure 3 , Figure 4 There are two hinged seats 41, which are respectively located on the left and right sides of the positioning bottom mold 2. Each hinged seat 41 includes a rotating shaft base 411 fixedly connected to the upper end surface of the base plate 1, a fixed horizontal block 412 rotatably connected to the rotating shaft base 411 through a hinge shaft, and a fixed vertical block 413 fixedly connected to one side of the fixed horizontal block 412. The axial direction of the hinge shaft is parallel to the left and right direction of the positioning bottom mold 2. The adsorption cover plate 42 is slidably connected to the fixed horizontal block 412 along the length direction of the fixed horizontal block 412. The adsorption cover plate 42 is fixedly connected to the fixed horizontal block 412. The connecting block 421 is fixed with a connecting rod 414 that is slidably penetrated by the fixed vertical block 413. The front and rear driving members are forward push springs 43 sleeved on the connecting rods 414. One end of the forward push spring 43 abuts / is fixed to the side wall of the connecting block 421, and the other end of the forward push spring 43 abuts / is fixed to the side wall of the fixed vertical block 413. A plurality of suction cups 422 are fixed to the lower end surface of the adsorption cover plate 42 for contacting with the upper end surface of the back cover 20 to adsorb the back cover 20 , and a handle 423 is fixedly connected to the upper surface of the free end of the adsorption cover plate 42 .

[0038] The flip-up driving mechanism 44 includes a cam guide block 441 fixedly connected to the upper end surface of the base plate 1 and located at one side of the front part of the back cover 20, a cam fixing block 442 movably connected to the cam guide block 441 and fixedly connected to the free end of the adsorption cover plate 42, a push block 443 slidably connected to the upper end surface of the base plate 1 along the front-back direction and abutting against the cam fixing block 442, and a removal driving member driving the push block 443 to slide. The push block 443 has a guide surface 4431 for the cam fixing block 442 to abut against so as to force the cam fixing block 442 to move upward, a limit rod 4421 is fixedly protruded from the side wall of the cam fixing block 442, and the cam guide block 441 is provided with an arc groove 4411 for the limit rod 4421 to slide and an inclined groove 4412 connected to the upper part of the arc groove 4411, and the upper part of the inclined groove 4412 is inclined toward the front end of the back cover 20 and extends to the upper end surface of the cam guide block 441. The removal driving member is a forward push cylinder 444 , the cylinder body of the forward push cylinder 444 is fixedly connected to the upper end surface of the base plate 1 , and the piston rod of the forward push cylinder 444 is fixedly connected to the outer side wall of the push block 443 .

[0039] The implementation principle of the jig for removing the computer back cover 20 in the embodiment of the present application is as follows: under normal conditions, the adsorption cover plate 42 is rotated to a vertical state, the display screen is placed on the positioning bottom mold 2, and then the piston rod of the clamping cylinder 32 is extended and retracted to drive the clamping block 31 to press against the outer wall and the upper surface of the edge of the display screen body 10, so as to fix the display screen body 10;

[0040] Then, the adsorption cover plate 42 is flipped over to a horizontal state. During this process, the limiting rod 4421 on the cam fixing block 442 passes through the inclined groove 4412 in sequence and enters the lower part of the arc groove 4411, and forces the adsorption cover plate 42 to slide a distance toward the rear end relative to the fixed cross block 412. At this time, the forward push spring 43 is in a compressed state and has elastic potential energy. After the suction cup 422 on the adsorption cover plate 42 is adsorbed and fixed to the back cover 20; the piston rod of the forward push cylinder 444 extends and drives the push block 443 to slide toward the cam fixing block 442, so that the guide surface 4431 of the push block 443 abuts against the lower end surface of the cam fixing block 442. When the push block 443 continues to advance, the cam fixing block 442 is forced to move upward, thereby causing the limiting rod 4421 to slide along the arc groove 4411. , thereby driving the free end of the adsorption cover plate 42 to flip over. When the limit rod 4421 slides to the upper part of the arc groove 4411 and enters the inclined groove 4412, the front end of the back cover 20 warps, causing the elastic buckle 201 to slide vertically out of the front plug column 101, thereby releasing the horizontal sliding freedom restriction of the back cover 20. Subsequently, the forward push spring 43 forces the adsorption cover plate 42 to slide forward, thereby driving the back cover 20 to slide forward for a distance. The limit rod 4421 slides to the upper part of the inclined groove 4412, thereby causing the rear card column 102 to slide out of the card slot of the limit plate 202, releasing the limit on the back cover 20. Subsequently, the operator drives the adsorption cover plate 42 to continue to flip upward through the handle 423, thereby realizing the complete separation of the back cover 20 and the display screen body 10.

[0041] Embodiment 2:

[0042] The difference from Example 1 is that, referring to Figure 5 The bottom inner wall of the positioning cavity 21 is provided with a plurality of adsorption holes 23, the positioning bottom mold 2 has an adsorption cavity 22 connected to the adsorption holes 23, and the main body fixing device 3 further includes an air pump connected to the adsorption cavity 22. After the display screen body 10 is placed in the positioning cavity 21, the lower end face of the display screen body 10 covers the adsorption holes 23, and the air pump is started to evacuate the adsorption cavity 22, so that the display screen body 10 is adsorbed and fixed to the positioning cavity 21.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A computer back cover removal jig, characterized in that: The invention comprises a substrate (1), a positioning bottom mold (2) arranged on the substrate (1) for positioning a display screen, a main body fixing device (3) arranged on the substrate (1) for fixing a display screen main body (10), and a removal device (4) arranged on the substrate (1) for removing a back cover (20), wherein the removal device (4) comprises a hinge seat (41) rotatably connected to a base and located on one side of a rear portion of the back cover (20), an adsorption cover plate (42) slidably connected to the hinge seat (41) along a front-to-rear direction for adsorbing an upper surface of the back cover (20), and a front-to-rear driving member arranged on the hinge seat (41) for driving the adsorption cover plate (42) to slide forward and backward, and the adsorption cover plate (42) is provided with a plurality of suction cups (422) for adsorbing the back cover (20).

2. The computer back cover removal jig according to claim 1, characterized in that: The removal device (4) further comprises an upward flipping driving mechanism (44) for driving the free end of the adsorption cover plate (42) to flip upward, the upward flipping driving mechanism (44) comprising a cam guide block (441) fixedly connected to the base plate (1) and located on the front side of the back cover (20), a cam fixing block (442) movably connected to the cam guide block (441) and fixedly connected to the free end of the adsorption cover plate (42), a push block (443) connected to the base plate (1) and abutting against the cam fixing block (442) along a horizontal sliding movement, and a removal driving member for driving the push block (443) to slide. The cam fixing block (442) is provided with a guide surface (4431) for abutting against the cam fixing block (442) so as to force the cam fixing block (442) to move upward. The cam fixing block (442) is provided with a limit rod (4421) protruding therefrom. The cam guiding block (441) is provided with an arc groove (4411) for the limit rod (4421) to slide and an inclined groove (4412) connected to the upper part of the arc groove (4411). The upper part of the inclined groove (4412) is inclined toward the front end of the back cover (20) and extends to the upper end surface of the cam guiding block (441). The front and rear driving members are forward push springs (43) provided on the hinge seat (41).

3. The computer back cover removal jig according to claim 2, characterized in that: The hinge seat (41) comprises a rotating shaft base (411) fixedly connected to the base plate (1), a fixed horizontal block (412) rotatably connected to the rotating shaft base (411), and a fixed vertical block (413) fixedly connected to one side of the fixed horizontal block (412); the adsorption cover plate (42) is slidably connected to the fixed horizontal block (412); the adsorption cover plate (42) is fixedly connected to a connecting block (421); the connecting block (421) is fixed with a connecting rod (414) slidably penetrated through the fixed vertical block (413); the forward push spring (43) is sleeved on the connecting rod (414); one end of the forward push spring (43) abuts / is fixed to a side wall of the connecting block (421); and the other end of the forward push spring (43) abuts / is fixed to a side wall of the fixed vertical block (413).

4. The computer back cover removal jig according to claim 2, characterized in that: The removal driving member is a forward push cylinder (444), the cylinder body of the forward push cylinder (444) is fixedly connected to the base plate (1), and the piston rod of the forward push cylinder (444) is fixedly connected to the push block (443).

5. The computer back cover removal jig according to claim 1, characterized in that: The main body fixing device (3) comprises a pair of clamping blocks (31) respectively located on the left and right sides of the positioning bottom mold (2) and slidably connected to the base plate (1), and a clamping driving member driving the clamping blocks (31) to slide and abut against the outer wall of the display screen main body (10).

6. The computer back cover removal jig according to claim 5, characterized in that: The clamping drive component is a clamping cylinder (32); a cylinder body of the clamping cylinder (32) is fixedly connected to the base plate (1); and a piston rod of the clamping cylinder (32) is fixedly connected to the clamping block (31).

7. The computer back cover removal jig according to claim 1, characterized in that: The upper end surface of the positioning bottom mold (2) is provided with a positioning cavity (21) for placing the display screen body (10), the bottom inner wall of the positioning cavity (21) is provided with a plurality of adsorption holes (23), the positioning bottom mold (2) has an adsorption cavity (22) connected to the adsorption holes (23), and the main body fixing device (3) includes an air pump connected to the adsorption cavity (22).