A desk adjustment device

Abstract

The present application provides a kind of desk adjusting device, belongs to desk technical field.It solves the problem of inconvenient height adjustment of existing table board and small lifting stroke at the same time.The adjusting device of the present desk, the desk includes table board frame, table leg and table board arranged on the table board frame, the upper end of the table leg is formed into a curved portion with downwardly inclined front end along the transverse protrusion, the present adjusting device includes support rod hingedly connected at the front end of the table board frame, the rear end of the support rod is hingedly connected with the rear end of the curved portion, the present adjusting device further includes adjusting plate one and adjusting plate two, one end of the adjusting plate one is hingedly connected with the table board frame, the other end is slidingly connected to the middle part of the support rod, a strip-shaped slot one is formed on the adjusting plate one, the lower end of the strip-shaped slot one extends to form a hook portion one to one side, and a limiting rod one is slidingly connected in the strip-shaped slot one.The adjusting device of the present desk can maintain the inclined state of the table board after being folded twice, which is convenient for students to lie down during lunch break.

Description

Technical Field

[0001] The invention belongs to the technical field of desks and relates to an adjusting device for a desk. Background Art

[0002] With the improvement of living standards, people are paying more and more attention to the comfort of students' lunch breaks. More and more desks and chairs that can be used for lying down during lunch breaks have been developed. During lunch breaks, students need to lower the table to a relatively low height to make it easier for them to place their legs on the table, thereby improving the comfort of their lunch breaks.

[0003] When lowering the desk top to a relatively low height, the legs of the desk can be made into a multi-section retractable structure. During adjustment, the position of the desk top needs to be adjusted after multiple unlockings. However, this will affect the stability of the table and is inconvenient to adjust. If the legs are made into two sections, the lifting stroke of the desk top will be greatly limited and it cannot be lowered to a lower height.

[0004] The table top can be adjusted to adjust the height of the table top by adjusting the angle of the table top, and the table top can be adjusted to adjust the height of the table top by adjusting the angle of the table top.

[0005] The above structure has two upper and lower slides on the desktop support rod, and the angle of the desktop is adjusted by the desktop angle adjustment rod and the desktop angle support rod, but the user's hands need to reach under the desktop to adjust the desktop angle adjustment rod and the desktop angle support rod, which makes adjustment inconvenience for the user. The adjustment of the desktop angle support rod and the desktop angle adjustment rod allows the desktop to change angle in only one direction, resulting in the maximum adjustment angle of the desktop being that the desktop can be placed horizontally on the base beam, thereby limiting the lifting travel of the desktop. In order to make it more comfortable for students to take a nap, the desktop can be directly lowered to a lower position, and the students' legs can be rested on the desktop to support the students' legs. The desktop lifting travel of the above-mentioned comparative document is limited, so the desktop can only be set close to the chair back after being tilted, freeing up space under the desktop for the students' legs, but cannot support the students' legs, reducing the comfort of students lying down. Summary of the Invention

[0006] The purpose of the present invention is to address the above-mentioned problems in the existing technology and to propose an adjustment device for a desk. The technical problem to be solved by the present invention is: how to solve the problem that the existing table top height adjustment is inconvenient and the lifting stroke is small.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] 7. The swiftly and minutely adjusting device for a wood-planer working table as claimed in claim 1, wherein said linking rod and said adjusting base are pivotally connected to each other with a bolt, and said bolt has a round shank to contact with said linking rod.

[0009] Working principle: When students need to use the desk normally in class, the table frame and the support rod are positioned against each other through the limit rod 1 and the top of the hook part 1. At this time, the rear end of the desktop frame tilts upward, and the desk top tilts upward with the table frame. The support rod and the curved part are positioned against each other through the limit rod 2 and the top of the hook part 2. At this time, the front end of the support rod tilts upward, so that the desk top on the table frame is set horizontally through the setting of two folding angles, which can be used by students normally in class; when students need to take a lunch break, they can directly lift the table frame upward, and at this time, the adjustment plate 1 moves upward synchronously with the table frame, so that the limit rod 1 can slide out from the hook part 1 and slide along the strip groove 1 The yoke is moved to the top of the first strip groove, so that the rear end of the table top of the table top frame swings downward, and the table top frame is positioned with the support rod through the adjustment plate one under its own gravity, and then by lifting the support rod upward, the limit rod two on the bent part can slide out from the hook part one and slide along the second strip groove to the top of the second strip groove, so that the front end of the support rod swings downward, and the front end of the table top frame swings downward synchronously with the support rod, and the table top frame and the support rod are positioned with the second adjustment rod and the bent part under their own gravity. At this time, the front end of the table top is tilted downward as the front end of the table top frame swings downward, which is convenient for students to place their legs on the table top to rest their legs during lunch break, making the students' lunch break more comfortable.

[0010] By swinging and folding twice in different directions, the table top can be lowered to a lower position, and the folding in two different directions can better support the table top frame, thereby improving the stability of the support after the table top is adjusted. When adjusting the position of the table top frame, you only need to lift the table top frame or the support rod to achieve rapid adjustment of the table top. Compared with the existing setting that directly adopts multiple-section telescopic rods, this case only needs to pull the table top on the table top frame to achieve position adjustment, so that students can adjust more conveniently and simply, and by changing the connection angle and connection position, the table top can be lowered to a lower height, thereby improving the lifting stroke of the table top, and maintaining the table top in an inclined state after two foldings, which is convenient for students to lie down and take a nap during lunch break.

[0011] In the above-mentioned desk adjustment device, the strip groove one and the strip groove two are both arc-shaped grooves, and the strip groove one and the strip groove two are both bent toward the rear end, the hook part one is located on the rear side of the strip groove one and is tilted upward, and the hook part two is located on the rear side of the strip groove two and is tilted upward.

[0012] The first and second strip grooves are both designed as arc grooves, which extend the guide path and can better guide the limit rods 1 and 2. The hook part 1 is located at the rear side of the strip groove 1. When the rear end of the table frame is moved down and folded, it is necessary to first lift the table frame and then slightly pull the adjustment plate 1 backwards so that the limit rod 1 can slide from the hook part to the strip groove 1. This avoids the rear end of the table frame swinging downward directly after the student slightly lifts the table frame when the desk is in use. The hook part 2 is located at the rear side of the strip groove 2. The side makes it necessary that when the rear end of the table frame is moved downward and folded, the table frame needs to be lifted first and then the adjustment plate 2 is slightly pulled backward so that the limit rod 2 can slide from the hook part 2 into the strip groove 1, avoiding the front end of the support rod swinging downward directly after the student slightly lifts the support rod when the desk is in use, thereby improving the safety of the desk. In addition, by arranging it on the rear side of the strip groove 2, it is more convenient for students to exert force after sitting at the rear end of the desk, which can improve the adjustment convenience of the adjustment device while ensuring the safety of the desk.

[0013] In the above-mentioned desk adjustment device, the limiting rod 1 is located at the front side of the hinge between the adjusting plate 2 and the support rod, and there is a clearance distance between the limiting rod 1 and the front side of the adjusting plate 2.

[0014] By setting the spacing, the adjustment plate 1 and the adjustment plate 2 do not interfere with each other during the adjustment process, and the adjustments of the two are independent of each other. Therefore, when the table frame needs to be adjusted in two opposite directions, it is sufficient to adjust one of the adjustment plates 1 and / or the adjustment plate 2, which improves the safety of the adjustment device and the convenience of operation.

[0015] In the above-mentioned desk adjustment device, when the limiting rod 1 abuts against the top wall of the hook part 1, the front end of the support rod is tilted upward, and the upper end surface of the table top is a horizontally arranged plane.

[0016] This structure ensures that when the limit rod 1 abuts against the top wall of the strip groove 1 of the adjustment plate 1, the rear end of the table frame swings downward, and the student sits at the rear end of the table frame. At this time, the table top of the table frame is tilted towards the student, and this state can be used as a drawing board bracket, so that the desk can not only be set horizontally for normal classes, but also be used as a drawing board with the rear end tilted downward. Therefore, the desk achieves dual uses and improves its practicality.

[0017] In the above-mentioned desk adjustment device, a hinge seat 1 is fixedly connected to the table frame, the front end of the support rod is hinged to the hinge seat 1, and a rotation gap 1 is provided between the front end of the support rod and the table frame, the upper end of the bent portion is fixedly connected to a hinge seat 2, the lower end of the support rod is hinged to the hinge seat 2, and a rotation gap 2 is provided between the support rod and the bent portion.

[0018] The setting of hinge seat 1 and hinge seat 2 makes the connection of the adjustment device more convenient, and for the adjustment of rotation gap 1 and rotation gap 2, the hinge seat 1 and hinge seat 2 of different sizes can be directly replaced, which is convenient for adjusting the inclination angle of the table top on the table top frame, reducing the changes to the table top frame, support rod and table legs, and the setting of rotation gap 1 and rotation gap 2 can also avoid interference between the table top frame and the support rod after swinging, thereby improving the adjustment stability of the adjustment device.

[0019] In the above-mentioned desk adjustment device, the adjustment plate 1 has a hinged part 1 hinged to the table frame and a sliding part 1 slidably connected to the support rod. When the limiting rod 1 abuts against the top wall of the strip groove 1, the upper end surface of the sliding part 1 is flush with the upper end surface of the support rod, or is located below the upper end surface of the support rod.

[0020] By setting the position of the upper end surface of the sliding part, the sliding part will not affect the space setting between the table frame and the support rod during adjustment, which is convenient for students to use and avoids students' fingers being pinched when using it, further improving the safety performance of the adjustment device.

[0021] In the above-mentioned desk adjustment device, the adjustment plate 2 has a hinged part 2 hinged to the table frame and a sliding part 2 slidably connected to the support rod. The rear side wall of the hinged part 2 and the upper side wall of the sliding part 2 are combined to form a clearance groove. When the limit rod 2 abuts against the top wall of the strip groove 2, the sliding part 2 and the hinged part 2 are both located obliquely below the upper end face of the support rod. A hand clamping opening is formed between the groove wall of the clearance groove and the lower side wall of the support rod. When the adjustment plate 2 moves upward, the hand clamping opening gradually becomes smaller, and an anti-clamping plate is connected to the support rod to block the hand clamping opening.

[0022] By setting the clearance groove, the sliding part 2 and the hinge part 2 of the adjustment plate 2 are always located below the upper end surface of the support rod when the support rod swings, and will not protrude from the upper end surface of the support rod to affect the setting between the support rod and the table frame. However, this design will form a hand clamping hole between the groove wall of the clearance groove and the lower side wall of the support rod, and the hand clamping hole becomes smaller when the adjustment plate 2 moves upward. Since the adjustment plate 2 needs to be pulled backward when the support rod is lifted upward so that the limit rod 2 can stably move from the hook part 2 to the strip groove 1, it is easy for students to put their fingers into the hand clamping hole when holding the adjustment plate 2. By connecting an anti-pinch plate to the support rod, the hand clamping hole is directly blocked, thereby improving the safety of the adjustment plate 2 when sliding.

[0023] In the above-mentioned desk adjustment device, when the second limiting rod abuts against the top wall of the second strip groove, the lower edge of the anti-pinch plate is close to or abuts against the upper edge of the curved portion.

[0024] If the lower edge of the anti-pinch plate is close to the upper edge of the curved portion, the anti-pinch plate will not affect the swing of the support rod; and if the lower edge of the anti-pinch plate is abutted against the upper edge of the curved portion, multiple supports are achieved between the support rod and the curved portion, thereby improving the stability of the downward swinging setting of the front end of the support rod.

[0025] In the above-mentioned desk adjustment device, there is a gap between the anti-pinch plate and the second hinge seat.

[0026] The interval setting ensures that the anti-pinch plate will not interfere with the second hinge seat when the support rod swings, further improving the adjustment stability of the adjustment device.

[0027] In the above-mentioned desk adjustment device, the above-mentioned table legs are provided on both the left and right sides of the table frame, and a door-shaped connecting rod is fixedly connected between the two support rods. The opening of the connecting rod is set toward the rear, and the connecting rod has two positioning sections connected to the support rods and a supporting section located at the front end of the support rod and connecting the two positioning sections.

[0028] The setting of the supporting section and the positioning section can enhance the connection strength of the two support rods, thereby enhancing the lateral positioning effect between the two support rods without affecting the normal use of students, and also improving the stability of the entire front end of the desk.

[0029] Compared with the prior art, the adjustment device of this desk has the following advantages:

[0030] 1. The table top can be lowered to a lower position by swinging and folding twice in different directions, and when adjusting the position of the table top frame, you only need to lift the table top frame or the support rod to achieve rapid adjustment of the table top. Compared with the existing setting that directly adopts a multi-section telescopic rod, this case only needs to pull the table top on the table top frame to achieve position adjustment, so that students can adjust it more conveniently and simply, and by changing the connection angle and connection position, the table top can be lowered to a lower height, the lifting stroke of the table top can be improved, and the table top can maintain an inclined state after two foldings, which is convenient for students to lie down and take a nap.

[0031] 2. The hook part 1 is located at the rear side of the strip groove 1, so that when the rear end of the table frame is moved downward and folded, it is necessary to first lift the table frame and then pull the adjusting plate 1 slightly backward so that the limit rod 1 can slide from the hook part 1 into the strip groove 1, avoiding that the front end of the support rod is directly swung downward after the student slightly lifts the support rod when the desk is in use, thereby improving the safety of the desk. In addition, by arranging it at the rear side of the strip groove 2, it is more convenient for students to exert force after sitting at the rear end of the desk, which can ensure the safety of the desk while improving the adjustment convenience of the adjustment device.

[0032] 3. The setting of the give way groove ensures that when the support rod swings, the sliding part and the hinge part of the adjustment plate 2 are always located below the upper end surface of the support rod, and will not protrude from the upper end surface of the support rod to affect the setting between the support rod and the table frame. However, this design will form a hand clamping hole between the groove wall of the give way groove and the lower side wall of the support rod, and the hand clamping hole becomes smaller when the adjustment plate 2 moves upward. Since the adjustment plate 2 needs to be pulled backward when the support rod is lifted upward so that the limit rod 2 can stably move from the hook part 2 to the strip groove 1, it is easy for students to put their fingers into the hand clamping hole when holding the adjustment plate 2. By connecting an anti-pinch plate to the support rod, the hand clamping hole is directly blocked, thereby improving the safety of the adjustment plate 2 when sliding. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the desk in the present invention when it is normally used in class.

[0034] Figure 2 This is a structural schematic diagram of the present invention in which the cover shell 1, the cover shell 2 and the anti-pinch plate are not installed and the desk is used normally during class.

[0035] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0036] Figure 4 This is a structural schematic diagram of the present invention in which the cover shell 1 and the cover shell 2 are not installed and the desk is used normally during class.

[0037] Figure 5 yes Figure 4 A partial enlarged view of point B in the middle.

[0038] Figure 6 It is a schematic diagram of the structure of the table frame and the support rods folded in the present invention.

[0039] Figure 7It is a schematic structural diagram of the desk after being folded twice in the present invention.

[0040] Figure 8 yes Figure 7 A partial enlarged view of point C in the middle.

[0041] Figure 9 The diagram is a structural diagram of the desk in the present invention in a lying down state after the desk is folded twice and the lowest end is lowered by using retractable legs.

[0042] In the figure, 1, table frame; 11, table top; 12, hinged seat 1; 2, table leg; 21, bent portion; 21a, limit rod 2; 22, hinged seat 2; 23, reinforcement rod; 23a, connecting section; 23b, reinforcement section; 3, support rod; 31, limit rod 1; 32, anti-pinch plate; 33, connecting rod; 33a, positioning section; 33b, support section; 4, adjustment plate 1; 41, strip groove 1; 41a, hook 1; 42 , hinge part one; 43, sliding part one; 44, cover shell one; 44a, handle two; 44a1, handle groove one; 5, adjustment plate two; 51, strip groove two; 51a, hook part two; 52, hinge part two; 53, sliding part two; 54, clearance groove; 55, cover shell two; 55a, handle two; 55a1, handle groove two; 6, clearance spacing; 7, rotation gap one; 8, rotation gap two; 9, hand clamping mouth; 10. interval. DETAILED DESCRIPTION

[0043] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0044] like Figure 1 As shown, the adjustment device of the desk comprises a desk frame 1, table legs 2 and a desk board 11 arranged on the desk frame 1, and the upper end of the table leg 2 is laterally raised to form a curved portion 21 with the front end inclined downward.

[0045] Specifically, if Figure 1-9 As shown, the present adjusting device includes a support rod 3 whose front end is hinged to the front end of the table board frame 1, and the rear end of the support rod 3 is hinged to the rear end of the bent portion 21. The present adjusting device also includes an adjusting plate 1 4 and an adjusting plate 2 5. One end of the adjusting plate 1 4 is hinged to the table board frame 1, and the other end is slidably connected to the middle part of the support rod 3. A strip groove 1 41 is provided on the adjusting plate 1 4, and the lower end of the strip groove 1 41 extends to one side to form a hook 1 41a. A limiting rod 1 31 is provided on the support rod 3 and is slidably connected to the strip groove 1 41. One end of the adjusting plate 2 5 is hinged to the middle part of the support rod 3, and the other end is slidably connected to the bent portion 21. A strip groove 2 51 is provided on the adjusting plate 2 5, and the lower end of the strip groove 2 51 extends to one side to form a hook 2 51a. The bent portion 21 is provided with a limiting rod 21a that is slidably connected to the strip groove 2 51.

[0046] Working principle: When students need to use the desk top frame 1 normally in class, the limit rod 131 and the top of the hook 41a are pressed against each other between the table frame 1 and the support rod 3. At this time, the rear end of the desktop frame tilts upward, and the desk top 11 tilts upward with the desk frame 1. The limit rod 21a and the top of the hook 251a are pressed against each other between the support rod 3 and the curved portion 21. At this time, the front end of the support rod 3 tilts upward, so that the desk top 11 on the desk frame 1 is set horizontally through the setting of two folding angles, which can be used by students normally in class; when students need to take a lunch break, they can directly lift the desk frame 1 upward, and at this time, the adjustment plate 4 moves upward synchronously with the desk frame 1, so that the limit rod 31 can slide out from the hook 41a and slide along the strip groove 41 When the support rod 3 is lifted up, the front end of the table top 11 is tilted downwards, and the students can put their legs on the table top 11 and rest their legs on it.

[0047] By swinging and folding twice in different directions, the table top 11 can be lowered to a lower position, and when adjusting the position of the table top frame 1, it is only necessary to lift the table top frame 1 or the support rod 3, thereby realizing rapid adjustment of the lifting and lowering of the table top 11. Compared with the existing setting that directly adopts a multi-section telescopic rod, this case only needs to pull the table top 11 on the table top frame 1 to achieve position adjustment, so that students can adjust it more conveniently and simply, and by changing the connection angle and connection position, the table top 11 can be lowered to a lower height, thereby increasing the lifting stroke of the table top 11, and maintaining the table top 11 in an inclined state after two foldings, which is convenient for students to lie down and take a nap.

[0048] like Figure 2-6As shown, the strip groove 1 41 and the strip groove 2 51 are both arc grooves, and the strip groove 1 41 and the strip groove 2 51 are both bent toward the rear end, the hook portion 1 41a is located at the rear side of the strip groove 1 41, and the hook portion 2 51a is located at the rear side of the strip groove 2 51, the limiting rod 1 31 is located at the front side of the hinge of the adjustment plate 2 5 and the support rod 3, and there is a clearance 6 between the limiting rod 1 31 and the front side of the adjustment plate 2 5. When the limiting rod 1 31 abuts against the top wall of the hook portion 1 41a of the adjustment plate 1 4, the front end of the support rod 3 is tilted upward, and at this time, the clamping force between the support rod 3 and the connecting cross bar of the table frame 1 The angle is 30°~60°. In the present embodiment, the angle is 45°. The outer wall of the support rod 3 is a vertically arranged plane. When the limit rod 21a abuts against the top wall of the hook 2 51a of the adjustment plate 2 5, the angle between the support rod 3 and the bent portion 21 is 30°~60°. In the present embodiment, the angle is 45°. When both angles are 45°, the lifting and lowering of the table board 11 is most stable, and the table legs 2 are retractable table legs 2. The table legs 2 can realize fine-tuning of the overall height of the table board frame 1, which is convenient for students of different heights to use and enhances the practicality of the entire desk adjustment device.

[0049] like Figure 6-8 As shown, a hinge seat 12 is fixedly connected to the table frame 1, the front end of the support rod 3 is hinged to the hinge seat 12, and a rotation gap 7 is provided between the front end of the support rod 3 and the table frame 1, the upper end of the bent portion 21 is fixedly connected to a hinge seat 22, the lower end of the support rod 3 is hinged to the hinge seat 22, and a rotation gap 28 is provided between the support rod 3 and the bent portion 21.

[0050] like Figure 6-8 As shown, the adjustment plate 4 has a hinge portion 42 hinged to the table frame 1 and a sliding portion 43 slidably connected to the support rod 3. When the limiting rod 31 abuts against the top wall of the strip groove 41, the upper end surface of the sliding portion 43 is flush with the upper end surface of the support rod 3, or is located below the upper end surface of the support rod 3.

[0051] like Figure 2-6 As shown, the adjustment plate 2 5 has a hinge part 2 52 hinged to the table frame 1 and a sliding part 2 53 slidably connected to the support rod 3. The rear side wall of the hinge part 2 52 and the upper side wall of the sliding part 2 53 are combined to form a clearance groove 54. When the limit rod 21a abuts against the top wall of the strip groove 2 51, the sliding part 2 53 and the hinge part 2 52 are both located obliquely below the upper end surface of the support rod 3, and a hand clamping opening 9 is formed between the groove wall of the clearance groove 54 and the lower side wall of the support rod 3. When the adjustment plate 2 5 moves upward, the hand clamping opening 9 gradually becomes smaller. An anti-pinch plate 32 is connected to the support rod 3 to block the hand clamping opening 9. When the limit rod 21a abuts against the top wall of the strip groove 2 51, the lower edge of the anti-pinch plate 32 is close to or abuts against the upper edge of the curved part 21, and there is a gap 10 between the anti-pinch plate 32 and the hinge seat 2 22.

[0052] like Figure 1 and Figure 2 As shown, the table frame 1 is provided with the aforementioned table legs 2 on both sides. A door-shaped reinforcement rod 23 is fixedly connected between the two curved portions 21. The opening of the reinforcement rod 23 faces rearward. The reinforcement rod 23 comprises two connecting segments 23a connected to the inner sidewalls of the curved portion 21, and a reinforcement segment 23b located at the front end of the curved portion 21 and connecting the two connecting segments 23a. A door-shaped connecting rod 33 is fixedly connected between the two support rods 3. The opening of the connecting rod 33 faces rearward. The connecting rod 33 comprises two positioning segments 33a connected to the support rods 3, and a support segment 33b located at the front end of the support rods 3 and connecting the two positioning segments 33a. The provision of the reinforcement rod 23 does not affect the normal use of the student, but also increases the strength of the table legs 2, making the table frame 1 more stable when placed after being folded twice, thereby improving the stability of the entire desk.

[0053] like Figure 1 As shown, adjustment plate 1 (4) is connected to cover 1 (44), which is located within cover 1 (44). Cover 1 (44) has a raised handle 1 (44a) with a forward-facing handle groove 1 (44a1). Adjustment plate 2 (5) is connected to cover 2 (55), which is located within cover 2 (55). Cover 2 (55) has a raised handle 2 (55a) with a forward-facing handle groove 2 (55a1). The arrangement of cover 1 (44) and cover 2 (55) prevents students' hands from getting stuck in strip groove 1 (41) and strip groove 2 (51) during adjustment. The arrangement of handle groove 1 (44a1) and handle groove 2 (55a1) facilitates student exertion, making desk adjustment more convenient.

[0054] like Figure 8 and Figure 9 As shown, the table legs 2 can be retractable, so that students with different heights can further adjust the height of the table top 11 by adjusting the height of the table legs 2, thereby improving the practicality of the desk.

[0055] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A desk adjustment device, comprising a desk frame (1), table legs (2) and a desk board (11) arranged on the desk frame (1), wherein the upper end of the table leg (2) is laterally raised to form a curved portion (21) with a front end inclined downward, characterized in that: The present adjustment device comprises a support rod (3) whose front end is hinged to the front end of the table frame (1), and the rear end of the support rod (3) is hinged to the rear end of the bending portion (21). The present adjustment device also comprises an adjustment plate 1 (4) and an adjustment plate 2 (5), one end of the adjustment plate 1 (4) is hinged to the table frame (1), and the other end is slidably connected to the middle part of the support rod (3), the adjustment plate 1 (4) is provided with a strip groove 1 (41), the lower end of the strip groove 1 (41) extends to one side to form a hook 1 (41a), the support rod (3) is provided with a limit rod 1 (31) slidably connected to the strip groove 1 (41), and one end of the adjustment plate 2 (5) is hinged to the middle part of the support rod (3). The middle part is hinged, and the other end is slidably connected to the curved part (21). The second regulating plate (5) is provided with a second strip groove (51). The lower end of the second strip groove (51) extends to one side to form a second hook part (51a). The curved part (21) is provided with a second limiting rod (21a) slidably connected in the second strip groove (51). The first strip groove (41) and the second strip groove (51) are both arc grooves. The first strip groove (41) and the second strip groove (51) are both bent toward the rear end. The first hook part (41a) is located at the rear side of the first strip groove (41) and is tilted upward. The second hook part (51a) is located at the rear side of the second strip groove (51) and is tilted upward.

2. The desk adjustment device according to claim 1, characterized in that: The limiting rod 1 (31) is located at the front side of the hinge between the adjusting plate 2 (5) and the supporting rod (3), and there is a clearance distance (6) between the limiting rod 1 (31) and the front side of the adjusting plate 2 (5).

3. The desk adjustment device according to claim 1, characterized in that: When the limiting rod (31) abuts against the top wall of the hook portion (41a), the front end of the support rod (3) is tilted upward, and the upper end surface of the table top (11) is a horizontally arranged plane.

4. The desk adjustment device according to claim 1, characterized in that: The table frame (1) is fixedly connected to a hinge seat (12), the front end of the support rod (3) is hinged to the hinge seat (12), and a rotation gap (7) is provided between the front end of the support rod (3) and the table frame (1); the upper end of the curved portion (21) is fixedly connected to a hinge seat (22), the lower end of the support rod (3) is hinged to the hinge seat (22), and a rotation gap (8) is provided between the support rod (3) and the curved portion (21).

5. The desk adjustment device according to claim 1, characterized in that: The adjustment plate (4) comprises a hinged portion (42) hinged to the table frame (1) and a sliding portion (43) slidably connected to the support rod (3); when the limiting rod (31) abuts against the top wall of the strip groove (41), the upper end surface of the sliding portion (43) is flush with the upper end surface of the support rod (3), or is located below the upper end surface of the support rod (3).

6. The desk adjustment device according to claim 4, characterized in that: The second adjustment plate (5) comprises a second hinged portion (52) hinged to the table frame (1) and a second sliding portion (53) slidably connected to the support rod (3); the rear side wall of the second hinged portion (52) and the upper side wall of the second sliding portion (53) are combined to form a clearance groove (54); when the second limiting rod (21a) abuts against the top wall of the second strip groove (51), the second sliding portion (53) and the second hinged portion (52) are both located obliquely below the upper end face of the support rod (3); a hand clamping opening (9) is formed between the groove wall of the clearance groove (54) and the lower side wall of the support rod (3); when the second adjustment plate (5) moves upward, the hand clamping opening (9) gradually becomes smaller; and an anti-clamping plate (32) is connected to the support rod (3) to block the hand clamping opening (9).

7. The desk adjustment device according to claim 6, characterized in that: When the second limiting rod (21a) abuts against the top wall of the second strip groove (51), the lower edge of the anti-snap plate (32) is close to or abuts against the upper edge of the curved portion (21).

8. The desk adjustment device according to claim 6, characterized in that: There is a gap (10) between the anti-sandwich plate (32) and the second hinge seat (22).

9. The desk adjustment device according to claim 1, characterized in that: The table legs (2) are provided on both the left and right sides of the table frame (1), and a door-shaped connecting rod (33) is fixedly connected between the two support rods (3). The opening of the connecting rod (33) is arranged toward the rear, and the connecting rod (33) has two positioning sections (33a) connected to the support rods (3) and a supporting section (33b) located at the front end of the support rod (3) and connecting the two positioning sections (33a).

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