CN111772346A - A desk that can prevent myopia - Google Patents

Abstract

The invention discloses a desk capable of preventing eye myopia, comprising a connecting frame, the connecting frame is movably connected with a table board through a movable shaft, the connecting frame is connected with the support board through a support rod, and the table board is connected with a fixing block The first is movably connected with the top of the sleeve, the inside of the sleeve is provided with a movable rod, the bottom of the movable rod is movably connected with the second fixed block, the second fixed block is connected with the support plate, the The top is connected with the sliding rod through the first limiting mechanism, the end of the sliding rod close to the movable rod is fixedly connected with a sliding plate, the top of the sliding rod is connected with the screw rod 1 through the adjusting mechanism, and the outer surface of the screw rod 1 is threadedly connected with a thread A second sleeve is connected between the threaded sleeve and the first screw rod, a connecting cylinder is sleeved on the outer surface of the threaded sleeve, and the top of the connecting cylinder is fixedly connected to a limiting plate. Beneficial effect: The desk has high adaptability and diversity, and can meet the different needs of students.

Description

A desk that can prevent myopia

technical field

The invention relates to the technical field of desks, in particular to a desk capable of preventing myopia.

Background technique

Myopia in children belongs to myopia, a type of refractive error, which is different from myopia in adults. Myopia (nearsightedness) refers to a refractive state in which parallel rays pass through the refractive system of the eye and fall before the retina when the eye is relaxed. Pediatric myopia refers to the onset of childhood, which is characterized by dysregulation, progression, and multi-factor interference.

In the prior art, the essential cause of myopia in young people is that they look at things near for a long time, the eyes cannot rest for a long time, and visual fatigue occurs for a long time. Myopia, although the existing desks have guardrails to maintain the distance between the desks, but due to the different heights of different students, the guardrails play a limited role in preventing myopia. There is a large height difference between them, and the existing desks have a fixed height, which cannot be aimed at different students, and most of the desks cannot be changed in angle, but can only be kept horizontal. For some students, learning maintains a good posture. more difficult;

Although some of the existing desks have height adjustment or change the angle of the desktop, on the one hand, changing the angle of the desktop will affect the students' learning. Therefore, there is a need for a desk that can be adjusted according to the actual height of students and has anti-myopia function to meet the needs of students of different heights.

For the problems in the related technologies, no effective solutions have been proposed so far.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a desk capable of preventing myopia, so as to solve the above-mentioned problems in the background art.

In order to achieve the above purpose, the present invention provides the following technical solutions: a desk capable of preventing myopia, including a connecting frame, the connecting frame is movably connected to the table board through a movable shaft, and a support rod is fixedly connected to the bottom of the connecting frame , the bottom of the support rod is fixedly connected with a support plate, the bottom of the side of the table plate away from the support rod is fixedly connected with two fixing blocks 1, and the fixing block 1 is movably connected with the top of the sleeve , the inside of the sleeve is provided with a movable rod, the bottom of the movable rod is movably connected with a second fixed block, the second fixed block is connected with the support plate, and there are sliding grooves on both sides of the movable rod, so A sliding block is arranged inside the chute, and the sliding block is fixedly connected with the bottom end of the inner wall of the sleeve. The sleeve is provided with a groove near the sliding block, and a connecting block is arranged inside the groove. 1. One side of the first connecting block is fixedly connected with the connecting block 2, the other side of the connecting block 1 is fixedly connected with a connecting rod, the surface of the slider has a through hole 1, and the through hole 1 extends to the sleeve and communicate with the groove, the inner wall of the through hole 1 is fixedly connected to a limit ring 1, and a spring 1 is connected between the limit ring 1 and the connecting block 1, and the spring One is wrapped around the outer surface of the connecting rod, the surface of the movable rod is provided with a plurality of through holes matching the connecting rod, and the top of the support plate is connected to the sliding rod through the first limiting mechanism. One end of the sliding rod close to the movable rod is fixedly connected with a sliding plate, the top of the sliding rod is connected with the first screw rod through an adjustment mechanism, the outer surface of the first screw rod is threadedly connected with a threaded sleeve, and the threaded sleeve is connected with the first screw rod. Limiting mechanism 2 is connected between them, the outer surface of the threaded sleeve is sleeved with a connecting cylinder, the outer bottom of the connecting cylinder is fixedly connected with a fixed box 1, and the interior of the fixed box 1 is provided with a movable block, the movable block A fixing rod is fixedly connected to the middle part of the fixing rod. One end of the fixing rod is located on the outer side of the fixing box 1 and is fixedly connected with the connecting block 3. A spring 2 is connected between the fixing box 1 and the movable block. The spring The second is wound on the outer surface of the fixing rod, the connecting cylinder has a through hole 3 near the fixing rod, the threaded sleeve has a through hole 4 near the through hole, and the through hole 4 is opened. Three-phase matching with the through hole, a through hole five is opened on the top of the threaded sleeve and located above the through hole four, the through hole five is matched with the fixing rod, and the top of the connecting cylinder is fixed Connect the limit plate, the support plate is provided with a fixing mechanism at the second place near the fixed block, the bottom four corners of the support plate are fixedly connected with a fixed cylinder, and the interior of the fixed cylinder is provided with a moving rod, the moving rod A bottom block is fixedly connected to the bottom of the support plate, and the bottoms of the two sides of the support plate are provided with stabilizing rods. The stabilizing rods are fixedly connected to the moving rods. One side of the moving rod close to the connecting bolt is provided with a connecting groove.

Further, the adjustment mechanism includes a support block, a second screw, a moving block 1 and a bearing. The top two sides of the slide plate are fixedly connected with support blocks, and the support blocks are movably connected with the second screw through the bearing. A moving block 1 is threadedly connected to the outer surface of the second screw, and the bottom end of the screw 1 is fixedly connected with the moving block 1.

Further, a limit slot 1 is opened on the top of the slide plate, a limit block 1 is fixedly connected to the bottom of the moving block 1, and the limit block 1 is located in the limit slot 1 and is connected with the limit slot 1. match.

Further, one end of the second screw rod extends to the outside of the support block and is fixedly connected with the rotating block.

Further, a rubber pad is fixedly connected to the top of the limiting plate.

Further, the fixing mechanism includes a second fixing box, a second moving block, a third spring, a limiting frame, a second moving rod and a fixing slot, the top of the support plate is fixedly connected with the second fixing box, and the inside of the second fixing box is The second spring is connected to the moving block 2. The movable rod 2 is fixedly connected to the side of the movable block 2 away from the spring 3. The two ends of the fixed box 2 are fixedly connected to the limiting frame, and the inner side of the sliding rod is open. There is a fixing slot matched with the second moving rod.

Further, an opening is opened at the top of the fixed box 2, and a push block 1 is arranged in the opening. The bottom of the push block 1 is fixedly connected with the movable block 2, and the top of the push block 1 is fixedly connected with a Push block two.

Further, the first limit mechanism includes a second limit slot and a second limit block, a second limit slot is opened at the top of the support plate and close to the sliding rod, and a limit block is arranged inside the second limit slot. Second, the second limiting block is fixedly connected with the sliding rod.

Further, the second limiting mechanism includes a cavity, a third moving block, a third moving rod, and a second limiting ring. The top of the first screw rod is provided with a cavity, and the interior of the cavity is provided with a third moving block. The top of the moving block 3 is fixedly connected with the moving rod 3, the top of the moving rod 3 is located outside the cavity and is fixedly connected with the inner top of the threaded sleeve, and the inner wall of the cavity top is fixedly connected with the limiting ring 2.

Further, a prompt line is provided on the outer surface of the first moving rod.

Compared with the prior art, the present invention has the following beneficial effects:

(1) The desk not only has the function of height adjustment, so that it can adapt to students of different heights, and at the same time can adjust the angle of the desk board, so as to improve the comfort of students' learning, in addition, it can prevent students from myopia operation, to avoid the students' heads being too close to the desktop when studying, reducing the probability of myopia, and the anti-myopia operation is not affected by the adjustment of the angle of the desk, so that the desk has high adaptability and diversity, can Meet the different needs of students.

(2) The adjustment mechanism can adjust the position of the limit plate, so that the limit plate can be located under the chin of the student, and limit the sitting posture of the student, so that the limit plate can adapt to the position of the student. Together with the limit block 1, it can limit the moving block 1 to prevent it from rotating with the second screw rod. The rotating block is convenient for the rotation operation of the second screw rod. The rubber pad can improve the comfort of the students' chin in contact with the limit plate.

(3) The fixing mechanism can fix the sliding rod, so that the sliding rod cannot move on the support plate, so as to achieve the purpose of fixing the limit plate. The cooperation of the first push block, the second push block and the opening can facilitate the moving block. The second is to perform a moving operation, so as to achieve the purpose of moving the second moving rod.

(4) The limit mechanism limits a pair of sliding rods, so that the sliding rod can slide on the support plate but cannot be separated from the support plate. The limit mechanism two limits the threaded sleeve to prevent the threaded sleeve from rotating and moving away from the screw one. The prompt line plays the role of prompt, prompting the operator of the position of the connecting groove, so as to facilitate the operator to connect and fix the operation.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic structural diagram of a desk capable of preventing eye myopia according to an embodiment of the present invention;

2 is a schematic diagram of the connection structure of a connecting frame and a table board in a desk capable of preventing myopia according to an embodiment of the present invention;

3 is a schematic structural diagram of an adjustment mechanism in a desk capable of preventing myopia of the eyes according to an embodiment of the present invention;

4 is a schematic structural diagram of a screw rod, a threaded sleeve and a connecting cylinder in a desk capable of preventing eye myopia according to an embodiment of the present invention;

Fig. 5 is the enlarged view of A place in Fig. 4;

6 is a schematic structural diagram of a second fixing box in a desk capable of preventing myopia of the eyes according to an embodiment of the present invention;

7 is a schematic structural diagram of a skateboard in a desk that can prevent eye myopia according to an embodiment of the present invention;

8 is a schematic diagram of the connection structure of a sleeve and a movable rod in a desk capable of preventing eye myopia according to an embodiment of the present invention;

FIG. 9 is an enlarged view of B in FIG. 8 .

Reference number:

1. Connecting frame; 2. Active shaft; 3. Table plate; 4. Support rod; 5. Support plate; 6. Fixed block one; 7. Sleeve; 8. Active rod; 9. Fixed block two; 10. Slider Slot; 11, slider; 12, groove; 13, connecting block one; 14, connecting block two; 15, connecting rod; 16, through hole one; 17, limit ring one; 18, spring one; 19, through hole Hole two; 20, sliding rod; 21, slide plate; 22, screw one; 23, threaded sleeve; 24, connecting cylinder; 25, fixed box one; 26, movable block; 27, fixed rod; 28, connecting block three; 29 , spring two; 30, through hole three; 31, through hole four; 32, through hole five; 33, limit plate; 34, fixed cylinder; 35, moving rod one; 36, bottom block; 37, stable rod; 38 , connecting bolt; 39, connecting groove; 40, supporting block; 41, screw two; 42, moving block one; 43, bearing; 44, limit groove one; 45, limit block one; 46, rotating block; 47, Rubber pad; 48, fixed box two; 49, moving block two; 50, spring three; 51, limit frame; 52, moving rod two; 53, fixed groove; 54, opening; 55, push block one; 56, push block two; 57, limit slot two; 58, limit block two; 59, cavity; 60, move block three; 61, move rod three; 62, limit ring two; 63, prompt line.

Detailed ways

Below, in conjunction with the accompanying drawings and specific embodiments, the invention is further described:

Example 1:

1-9, according to an embodiment of the present invention, a desk capable of preventing myopia includes a connecting frame 1, the connecting frame 1 is movably connected with the table board 3 through a movable shaft 2, and the shape of the connecting frame 1 is designed Similar to the U shape, a support rod 4 is fixedly connected to the bottom of the connecting frame 1 , a support plate 5 is fixedly connected to the bottom of the support rod 4 , and the bottom of the side of the table board 3 away from the support rod 4 is fixedly connected There are two fixed blocks one 6, the fixed block one 6 is movably connected with the top of the sleeve 7, the inside of the sleeve 7 is provided with a movable rod 8, and the bottom of the movable rod 8 is movably connected with a fixed Block two 9, the fixed block two 9 is connected with the support plate 5;

There are sliding grooves 10 on both sides of the movable rod 8, and a sliding block 11 is arranged inside the sliding groove 10. The sliding block 11 is fixedly connected with the bottom end of the inner wall of the sleeve 7, and the sleeve 7 is close to The slider 11 is provided with a groove 12, and a connecting block 13 is arranged inside the groove 12. One side of the connecting block 13 is fixedly connected with a connecting block 2 14. A connecting rod 15 is fixedly connected to the other side. A through hole 16 is formed on the surface of the slider 11 . The through hole 16 extends to the sleeve 7 and communicates with the groove 12 . The inner wall of the hole one 16 is fixedly connected with a limiting ring 17. A spring one 18 is connected between the limiting ring 17 and the connecting block one 13, and the spring one 18 is wound around the outside of the connecting rod 15. The surface of the movable rod 8 is provided with a plurality of through holes 19 matching the connecting rod 15;

The top of the support plate 5 is connected with the sliding rod 20 through the limiting mechanism 1, and the sliding rod 20 is fixedly connected with the sliding rod 21 at one end of the movable rod 8, and the top of the sliding rod 21 is connected with the screw rod 22 through the adjusting mechanism. , the outer surface of the screw one 22 is threadedly connected with a threaded sleeve 23, the threaded sleeve 23 and the screw one 22 are connected with a second limiting mechanism, and the outer surface of the threaded sleeve 23 is sleeved with the connecting cylinder 24. The outer bottom of the connecting cylinder 24 is fixedly connected with a fixed box 1 25, the interior of the fixed box 25 is provided with a movable block 26, and the middle of the movable block 26 is fixedly connected with a fixed rod 27, and one end of the fixed rod 27 is located at The outer side of the first fixed box 25 is fixedly connected with the third connecting block 28 , a second spring 29 is connected between the first fixed box 25 and the movable block 26 , and the second spring 29 is wound around the fixing rod 27 The outer surface of the connecting cylinder 24 has a through hole 30 close to the fixing rod 27, and the threaded sleeve 23 has a through hole 31 close to the through hole 30. The third through hole 30 is matched, the top of the threaded sleeve 23 is located above the fourth through hole 31 and a through hole five 32 is opened, and the fifth through hole 32 is matched with the fixing rod 27;

The top of the connecting cylinder 24 is fixedly connected to the limit plate 33, and the top of the limit plate 33 is fixedly connected with a rubber pad 47. The rubber pad 47 can improve the comfort when the student’s chin is in contact with the limit plate 33, and the support The plate 5 is provided with a fixing mechanism near the fixing block 29, the bottom four corners of the support plate 5 are fixedly connected with a fixing cylinder 34, and a moving rod 35 is arranged inside the fixing cylinder 34, and the moving rod 1 35 A bottom block 36 is fixedly connected to the bottom of the support plate 5, and a stabilizing rod 37 is provided at the bottom of both sides of the support plate 5. The stabilizing rod 37 is fixedly connected with the moving rod 1 35, and the side wall of the fixing cylinder 34 is threadedly connected with a Connecting bolt 38, a connecting groove 39 is opened on the side of the moving rod one 35 close to the connecting bolt 38, and a prompt line 63 is provided on the outer surface of the moving rod one 35, and the prompt line 63 plays a role of prompting, prompting The position of the operator's connection groove 39 is convenient for the operator to perform the connection and fixing operation.

Embodiment 2:

1-3, the adjustment mechanism includes a support block 40, a second screw 41, a moving block 42 and a bearing 43. The top two sides of the slide plate 21 are fixedly connected with support blocks 40, and between the support blocks 40 The bearing 43 is movably connected with the second screw 41, the outer surface of the second screw 41 is threadedly connected with a moving block one 42, the bottom end of the screw one 22 is fixedly connected with the moving block one 42, and the top of the sliding plate 21 A limit slot 1 44 is opened, the bottom of the moving block 1 42 is fixedly connected to a limit block 1 45 , and the limit block 1 45 is located in the limit slot 1 44 and matches with the limit slot 1 44 , one end of the second screw 41 extends to the outer side of the support block 40 and is fixedly connected with the rotating block 46, and the adjustment mechanism can adjust the position of the limit plate 33, so that the limit plate 33 can be located below the student's chin , to limit the student's sitting posture, so that the limit plate 33 can adapt to the position of the student, and the limit slot one 44 and the limit block one 45 can limit the moving block one 42 to prevent it from rotating with the second screw 41. The rotating block 46 facilitates the rotating operation of the second screw 41 .

Embodiment three:

Please refer to FIG. 1 and FIG. 6 , the fixing mechanism includes a second fixing box 48 , a second moving block 49 , a third spring 50 , a limit frame 51 , a second moving rod 52 and a fixing groove 53 , and the top of the support plate 5 is fixedly connected There is a second fixed box 48, the interior of the second fixed box 48 is connected with the second moving block 49 through a third spring 50, and a second moving rod 52 is fixedly connected to the side of the second moving block 49 away from the third spring 50. The two end ports of the second fixed box 48 are fixedly connected to the limiting frame 51, the inner side of the sliding rod 20 is provided with a fixing groove 53 that matches the second moving rod 52, and the top of the second fixed box 48 is opened with an opening 54, The opening 54 is provided with a push block 1 55, the bottom of the push block 1 55 is fixedly connected with the moving block 2 49, and the top of the push block 1 55 is fixedly connected with a push block 2 56, and the fixing mechanism can The sliding rod 20 is fixed so that the sliding rod 20 cannot move on the support plate 5, so as to achieve the purpose of fixing the limit plate 33. The cooperation of the first push block 55, the second push block 56 and the opening 54 can facilitate the movement of the second block. 49 performs a moving operation, so as to achieve the purpose of moving the second moving rod 52 .

Embodiment 4:

Please refer to FIG. 1 , the first limiting mechanism includes a second limiting slot 57 and a second limiting block 58 , a second limiting slot 57 is opened on the top of the support plate 5 and close to the sliding rod 20 . The limiting slot There is a second limit block 58 inside the second 57, the second limit block 58 is fixedly connected with the sliding rod 20, and the limit mechanism limits the sliding rod 20, so that the sliding rod 20 can slide on the support plate 5 However, it cannot be separated from the support plate 5.

Embodiment 5:

Please refer to FIGS. 3-4 , the second limiting mechanism includes a cavity 59 , a third moving block 60 , a third moving rod 61 and a second limiting ring 62 , and a cavity 59 is opened on the top of the first screw rod 22 . The interior of the cavity 59 is provided with a third moving block 60 , the top of the moving block 60 is fixedly connected with the moving rod three 61 , and the top of the moving rod three 61 is located outside the cavity 59 and is connected with the inner top of the threaded sleeve 23 . For fixed connection, the inner wall of the top of the cavity 59 is fixedly connected with the limit ring 2 62 , and the limit mechanism 2 limits the threaded sleeve 23 to prevent the threaded sleeve 23 from rotating and moving away from the screw rod 1 22 .

In order to facilitate the understanding of the above technical solutions of the present invention, the working principle or operation mode of the present invention in the actual process will be described in detail below.

In practical application, when the height of the desk is not satisfied, the connecting bolt 38 can be rotated to make the connecting bolt 38 separate from the connecting groove 39, so as to move the moving rod 1 35, and the position of the connecting groove 39 can be known through the prompt line 63 , after adjusting the height, turn the connecting bolt 38 to fix the moving rod 1 35 and the fixed cylinder 34. When the students are studying, they first drive the pushing block 1 55 through the pushing block 2 56, so that the moving block 2 49 is inward. At this time, the spring three 50 is in a compressed state, and the moving rod two 52 does not affect the movement of the slide plate 21. Then the slide plate 21 is moved outward, and the slide rod 20 moves with the slide plate 21. When the slide rod 20 moves to the fixed box two 48 When the moving rod 2 52 pushes the lower port into the fixing groove 53 by the spring 3 50, the sliding rod 20 is fixedly operated, so that the sliding plate 21 cannot slide;

When the limiting plate 33 is located on the outside of the table top 3, the connecting block 3 28 is initially moved outward to make the fixing rod 27 separate from the through hole 4 31. At this time, the connecting cylinder 24 can move upward, and when the fixing rod 27 moves to the through hole 4 When the hole five is 32, the port of the fixing rod 27 enters the through hole five 32 under the push of the spring two 29. At this time, the connecting cylinder 24 cannot continue to move, and then the connecting cylinder 24 is rotated, and the threaded sleeve 23 rotates with the connecting cylinder 24. At this time, the threaded sleeve 23 and the connecting cylinder 24 are rotated and moved on the screw one 22, the height of the limit plate 33 is adjusted, so that the height of the limit plate 33 is matched with the student, and then the rotating block 46 is rotated to make the second screw 41 rotate , thereby driving the moving block one 42, the limit plate 33 moves together with the moving block one 42, so that the limit plate 33 is located in a suitable position, at this time, the limit plate 33 limits the chin of the student, so that the student maintains a standard sitting posture;

When the angle of the table board 3 needs to be adjusted, the second connecting block 14 can be moved outward, the first connecting block 13 moves with the second connecting block 14, and the connecting rod 15 is separated from the second through hole 19. At this time, the movable rod 8 can be in The sleeve 7 moves inside, and the table board 3 can be rotated at this time. After the angle of the table board 3 is adjusted, the second connecting block 14 can be released, so that the connecting rod 15 enters the second through hole 19, so that the table board 3 can be rotated. 3 The current angle is fixed.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (5)

1. The desk capable of preventing the myopia of the eyes is characterized by comprising a connecting frame (1), wherein the connecting frame (1) is movably connected with a desk plate (3) through a movable shaft (2).

2. The desk capable of preventing the myopia of the eyes as claimed in claim 1, wherein the bottom of the connecting frame (1) is fixedly connected with a supporting rod (4), the bottom of the supporting rod (4) is fixedly connected with a supporting plate (5), the bottom of one side of the desk plate (3) far away from the supporting rod (4) is fixedly connected with two first fixed blocks (6), the first fixed blocks (6) are movably connected with the top of a sleeve (7), a movable rod (8) is arranged inside the sleeve (7), the bottom of the movable rod (8) is movably connected with a second fixed block (9), the second fixed blocks (9) are connected with the supporting plate (5), sliding grooves (10) are formed in two sides of the movable rod (8), sliding blocks (11) are arranged inside the sliding grooves (10), and the sliding blocks (11) are fixedly connected with the bottom end of the inner wall of the sleeve (7), the sleeve (7) is provided with a groove (12) at a position close to the sliding block (11), a first connecting block (13) is arranged inside the groove (12), a second connecting block (14) is fixedly connected to one side of the first connecting block (13), a connecting rod (15) is fixedly connected to the other side of the first connecting block (13), a first through hole (16) is formed in the surface of the sliding block (11), the first through hole (16) extends to the sleeve (7) and is communicated with the groove (12), a first limiting ring (17) is fixedly connected to the inner wall of the first through hole (16), a first spring (18) is connected between the first limiting ring (17) and the first connecting block (13), the first spring (18) is wound on the outer surface of the connecting rod (15), and a plurality of second through holes (19) matched with the connecting rod (15) are formed in the surface of the movable rod (8), the top of the supporting plate (5) is connected with a sliding rod (20) through a first limiting mechanism, the sliding rod (20) is close to one end of a movable rod (8) and is fixedly connected with a sliding plate (21), the top of the sliding plate (21) is connected with a first screw rod (22) through an adjusting mechanism, the outer surface of the first screw rod (22) is in threaded connection with a threaded sleeve (23), a second limiting mechanism is connected between the threaded sleeve (23) and the first screw rod (22), the outer surface of the threaded sleeve (23) is sleeved with a connecting cylinder (24), the outer bottom of the connecting cylinder (24) is fixedly connected with a first fixed box (25), a movable block (26) is arranged inside the first fixed box (25), a fixed rod (27) is fixedly connected to the middle of the movable block (26), one end of the fixed rod (27) is located on the outer side of the first fixed box (25) and is fixedly connected with a third connecting block (, the fixing box I (25) and the movable block (26) are connected with a spring II (29), the spring II (29) is wound on the outer surface of the fixed rod (27), the connecting cylinder (24) is close to the fixed rod (27) and is provided with a through hole III (30), the thread bush (23) is close to the through hole III (30) and is provided with a through hole IV (31), the through hole IV (31) is matched with the through hole III (30), the top of the thread bush (23) is positioned above the through hole IV (31) and is provided with a through hole V (32), the through hole V (32) is matched with the fixed rod (27), the top of the connecting cylinder (24) is fixedly connected with a limiting plate (33), the supporting plate (5) is close to the fixed block II (9) and is provided with a fixing mechanism, and the bottom four corners of the supporting plate (5) are fixedly connected with a fixing cylinder (34), a first moving rod (35) is arranged inside the fixed cylinder (34), the bottom of the first moving rod (35) is fixedly connected with a bottom block (36), the bottoms of the two sides of the supporting plate (5) are provided with stabilizing rods (37), the stabilizing rods (37) are fixedly connected with the first moving rod (35), the side wall of the fixed cylinder (34) is in threaded connection with a connecting bolt (38), and one side, close to the connecting bolt (38), of the first moving rod (35) is provided with a connecting groove (39); the adjusting mechanism comprises supporting blocks (40), a second screw rod (41), a first moving block (42) and a bearing (43), the supporting blocks (40) are fixedly connected to two sides of the top of the sliding plate (21), the supporting blocks (40) are movably connected with the second screw rod (41) through the bearing (43), the first moving block (42) is connected to the outer surface of the second screw rod (41) in a threaded mode, and the bottom end of the first screw rod (22) is fixedly connected with the first moving block (42); the fixing mechanism comprises a second fixing box (48), a second moving block (49), a third spring (50), a limiting frame (51), a second moving rod (52) and a fixing groove (53), the second fixing box (48) is fixedly connected to the top of the supporting plate (5), the inside of the second fixing box (48) is connected with the second moving block (49) through the third spring (50), the second moving block (49) is fixedly connected with the second moving rod (52) on one side far away from the third spring (50), the limiting frames (51) are fixedly connected to ports at two ends of the second fixing box (48), and the fixing groove (53) matched with the second moving rod (52) is formed in the inner side of the sliding rod (20).

3. The desk capable of preventing the myopia of the eyes as claimed in claim 2, wherein a first limit groove (44) is formed in the top of the sliding plate (21), a first limit block (45) is fixedly connected to the bottom of the first moving block (42), and the first limit block (45) is located in the first limit groove (44) and matched with the first limit groove (44).

4. The desk capable of preventing myopia of eyes of claim 3, wherein one end of the second screw rod (41) extends to the outer side of the supporting block (40) and is fixedly connected with the rotating block (46).

5. The desk capable of preventing the myopia of the eyes as claimed in claim 2, wherein a rubber pad (47) is fixedly connected to the top of the limiting plate (33).

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