Liftable multifunctional student desk and chair

Abstract

The utility model discloses a liftable multifunctional student desk and chair, which comprises desk legs with adjustable height, a desk box for storing articles and a desk panel, one end of the desk panel is rotatably connected with one end of the top of the desk box, and the desk panel has a horizontal working position and an inclined working position; an angle maintaining mechanism is arranged between the bottom of the other end and the desk box; the angle maintaining mechanism comprises a supporting rod assembly arranged at the bottom end of the table top plate and a locking mechanism arranged on the table box, and when the table top plate is located at the inclination adjusting position, the supporting rod assembly is matched through the locking mechanism, so that multi-angle fixing of the table top plate is achieved; the utility model belongs to the technical field of teaching aids, aims to solve the problem that the angle of a table top cannot be adjusted in the prior art, and achieves the technical effects that one end of the table top plate is rotationally connected with the table box, the table top plate can be pulled to adjust the angle, and when the table top plate is in an inclined position, the locking mechanism is matched with the supporting rod assembly, so that the table top plate can be adjusted. Multi-angle fixation of the desktop board is achieved, the desktop inclination angle is locked, and students can conveniently use the desk.

Description

Technical Field

[0001] This utility model relates to the field of teaching aids technology, specifically to a height-adjustable multifunctional student desk and chair. Background Technology

[0002] With the increasing demand for upgrading the educational environment, the functional design of student desks and chairs, as the core carriers of the teaching scenario, urgently needs to be improved. In the current product system, the chairs have achieved significant innovations - equipped with mechanical multi-stage adjustment function, students can freely switch between standard sitting and lying positions through manual operation to meet the lunch break mode, which can effectively improve sleep quality, while ensuring that students can quickly return to a standard sitting position during the teaching period, achieving a seamless switch between the "learning-rest" scenario.

[0003] In contrast, the functional upgrades of school desks have lagged behind, revealing two core problems:

[0004] 1. The current flat desktop forces the reading angle to be maintained in a low angle range of 25-35°, causing students to be forced to maintain a forward-leaning posture, which not only easily causes cervical fatigue, but may also affect the normal development of the spine in the long run; (According to research by the AOA Optometry Association, the ideal reading angle should be 15-20°).

[0005] 2. In a standard classroom lighting environment, a fixed-plane design is prone to two types of optical interference: shadow effect in the writing area and specular reflection in the non-shadow area. This abnormal lighting environment can reduce the processing efficiency of the visual cortex by more than 30%, causing eye fatigue. In simple terms, when looking down, there may still be shadows on the textbook (due to the current lighting control, this part has a smaller impact on students), and the parts that do not overlap with the shadows may be illuminated and produce some reflections (this part may cause eye fatigue for students). Both of these will affect students.

[0006] If the desktop angle could be adjusted so that the books could be tilted, it would reduce glare from the books and the amount of head tilting required when reading, thus reducing neck strain, without affecting students' reading experience.

[0007] Therefore, since the existing needs are not met, we propose a multifunctional student combination desk and chair. Utility Model Content

[0008] Therefore, this utility model provides a height-adjustable multifunctional student desk and chair to solve the above-mentioned problems in the prior art.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] According to a first aspect of the present invention, a height-adjustable multifunctional student desk and chair includes height-adjustable table legs, a storage box for storage, and a desktop. One end of the desktop is rotatably connected to the top end of the storage box, and has two forms: a horizontal working position and an inclined working position. An angle maintaining mechanism is provided between the bottom of the other end and the storage box.

[0011] The angle maintaining mechanism includes a support rod assembly disposed at the bottom of the desktop panel and a locking mechanism disposed on the table box. When the desktop panel is in the tilt adjustment position, the locking mechanism cooperates with the support rod assembly to achieve multi-angle fixation of the desktop panel.

[0012] Furthermore, the support rod assembly includes: a hinge frame, the top end of which is rotatably connected to the bottom of the tabletop, and a through hole on the side of the hinge frame away from the tabletop; and a positioning hole on the side wall of the table case.

[0013] Furthermore, the locking mechanism includes: a bolt installed in the positioning hole, the bolt's shank passing through the through hole and threadedly connected to the inner wall of the positioning hole, and the outer wall of the shank being rotatably connected to the inner wall of the through hole.

[0014] Furthermore, the through hole is a vertical through groove.

[0015] Furthermore, the hinge frame includes:

[0016] Hinged rod one, the top end of which is rotatably connected to the bottom of the desktop board;

[0017] A hinge frame, wherein the top of the hinge frame is rotatably connected to the bottom of a hinge rod, and the through hole is formed at the bottom of the hinge frame.

[0018] Furthermore, a connecting shaft is fixedly connected to the top outer side of the hinge frame, and an arc-shaped groove is provided on the side wall of the table box, with the center of the arc-shaped groove being coaxial with the positioning hole.

[0019] Furthermore, the locking mechanism also includes:

[0020] A flexible pawl is rotatably connected to the outer wall of the connecting shaft;

[0021] The ratchet teeth are arranged in an arc-shaped array on the inner wall of the arc-shaped groove.

[0022] Preferably, the outer wall of the connecting shaft is provided with an annular groove, and a spiral spring is installed on the inner wall of the annular groove. The two ends of the spiral spring are respectively fixedly connected to the bottom end of the inner wall of the annular groove and the inner wall of the claw.

[0023] This utility model has the following advantages:

[0024] 1. This type of height-adjustable multi-functional student desk and chair has one end of the desktop panel rotatably connected to the desk box. The desktop panel can be pulled to adjust its angle. When the desktop panel is in the tilt adjustment position, the locking mechanism cooperates with the support rod assembly to fix the desktop panel at multiple angles and lock the desktop tilt angle for convenient use by students.

[0025] 2. This height-adjustable multi-functional student desk and chair, through the linkage of the hinge rod, the hinge frame and the connecting shaft, combined with the meshing and locking mechanism of the ratchet teeth and the elastic pawl, allows the operator to automatically trigger the lock by simply lifting the desktop once when adjusting the tilt angle of the desktop, without the need for repeated disassembly or tightening of bolts, which significantly simplifies the operation steps and improves the adjustment efficiency.

[0026] 3. This height-adjustable multi-functional student desk and chair features a connecting shaft that revolves along an arc-shaped groove, which, in conjunction with the elastic reset characteristics of the pawl, allows the desktop to be infinitely adjustable within the arc-shaped groove's trajectory. Simultaneously, the evenly spaced ratchet teeth transform the adjustment process into segmented locking, ensuring both flexibility in angle selection and precise fixation at preset positions, thus expanding its applicability. Attached Figure Description

[0027] Figure 1 This is a front view of a height-adjustable multifunctional student desk and chair proposed in this utility model;

[0028] Figure 2 This is an internal view of a height-adjustable multifunctional student desk and chair proposed in this utility model.

[0029] Figure 3 The front view of the circular through-hole of a height-adjustable multifunctional student desk and chair proposed in this utility model;

[0030] Figure 4 This is a front view of the vertical through-hole of a height-adjustable multifunctional student desk and chair proposed in this utility model.

[0031] Figure 5 This utility model proposes a height-adjustable, multi-functional student desk and chair. Figure 1 Side, front, and bottom views;

[0032] Figure 6 This utility model proposes a height-adjustable, multi-functional student desk and chair. Figure 5 A schematic diagram of the decomposition process;

[0033] Figure 7 The present invention proposes a hinge rod for a height-adjustable multifunctional student desk and chair, and a front view of the hinge frame.

[0034] Figure 8 This utility model proposes a height-adjustable, multi-functional student desk and chair. Figure 1 Enlarged view of region A in the middle;

[0035] Figure 9 This utility model proposes a height-adjustable, multi-functional student desk and chair. Figure 7 Schematic diagram of the exploded annular groove.

[0036] In the diagram: 101, table leg; 102, table case; 202, tabletop; 3, support rod assembly; 4, hinge frame; 401, hinge rod one; 402, hinge frame; 403, connecting shaft; 5, locking mechanism; 501, arc groove; 502, ratchet tooth; 503, pawl; 504, annular groove; 505, spiral spring; 506, through hole; 507, positioning hole; 509, bolt. Detailed Implementation

[0037] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0038] Example 1

[0039] Reference Figure 3 A height-adjustable multifunctional student desk and chair includes height-adjustable table legs 101, a storage box 102, and a desktop 202. The height adjustment of the table legs 101 can be driven by an electric telescopic rod. The storage box 102 is a box with an open structure at the top and front.

[0040] One end of the desktop panel 202 is rotatably connected to the top end of the table box 102, and has two forms: a horizontal working position and an inclined working position; the other end of the bottom is provided with an angle maintaining mechanism between the bottom of the table box 102.

[0041] The angle maintaining mechanism includes a support rod assembly 3 located at the bottom of the desktop panel 202 and a locking mechanism 5 located on the table box 102. When the desktop panel 202 is in an inclined position, the locking mechanism 5 cooperates with the support rod assembly 3 to achieve multi-angle fixation of the desktop panel 202.

[0042] The support rod assembly 3 includes: a hinge frame 4, the top of which is rotatably connected to the bottom of the desktop 202, and a through hole 506 on the side of the hinge frame 4 away from the desktop 202. The through hole 506 is a circular hole. The support rod assembly 3 also includes a positioning hole 507 on the side wall of the table box 102. The hinge frame 4 is a crossbar.

[0043] The locking mechanism 5 includes a bolt 509 installed in the positioning hole 507. The screw of the bolt 509 passes through the through hole 506 and is threadedly connected to the inner wall of the positioning hole 507. The outer wall of the screw is rotatably connected to the inner wall of the through hole 506.

[0044] Working principle: When in use, pull the desktop panel 202 and rotate it upward with the rotating connection point at the front end of the table box 102 as the center. After the circular through hole 506 is aligned with the positioning hole 507 opened on the side wall of the table box 102, the bolt 509 is threaded through the positioning hole 507 and connected to the inner wall of the through hole 506, thereby fixing the bottom of the hinge frame 4. The hinge frame 4 supports the rear bottom of the desktop panel 202, so that the desktop panel 202 remains tilted.

[0045] Example 2:

[0046] Similar to Embodiment 1, the technical problem with the above solution is that the through hole 506 is a through circular hole. When adjusting the angle of the desktop panel 202, it can only be adjusted to a specific angle, and the angle is determined by the position of the through hole 506. It is impossible to adjust it to a suitable angle according to the actual situation. Furthermore, referring to... Figure 4 A height-adjustable, multi-functional student desk and chair, with through hole 506 being a vertical through groove;

[0047] Working principle: Before use, bolt 509 is threaded through the vertical through hole 506 and connected to the inner wall of the positioning hole 507. However, at this time, the connection between the stud of bolt 509 and the positioning hole 507 is not deep, and the nut of bolt 509 does not contact the bottom outer side of the hinge frame 4. Therefore, when the desktop panel 202 is pulled and rotated upward with the rotational connection point with the front end of the table box 102 as the center, the desktop panel 202 pulls the hinge frame 4 upward. At the same time, the vertical through hole 506 on the hinge frame 4 moves along the stud of bolt 509. Within the length of the vertical through hole 506, it can be adjusted to any angle. After adjusting to a suitable angle, the bolt 509 is rotated and the nut of bolt 509 cooperates with the inner wall of the table box 102 to clamp and fix the hinge frame 4, so that the desktop panel 202 remains tilted.

[0048] Example 3:

[0049] The solution is basically the same as in Example 1, except that the hinge frame 4 is a folding frame. A problem with the above solution is that when adjusting the angle of the desktop 202, when pulling one side of the desktop 202 upwards, it is necessary to manually install the bolt 509. Furthermore, referring to… Figure 1 , Figures 5-9A height-adjustable multifunctional student desk and chair, the hinge frame 4 includes: a hinge rod 401, the top of the hinge rod 401 being rotatably connected to the bottom of the desktop 202; a hinge frame 402, the top of the hinge frame 402 being rotatably connected to the bottom of the hinge rod 401, and a through hole 506 being opened at the bottom of the hinge frame 402; a connecting shaft 403 is fixedly connected to the outer side of the top of the hinge frame 402, and an arc groove 501 is opened on the side wall of the desk box 102, the center of the arc groove 501 being coaxial with the positioning hole 507; the hinge frame 4 is set as a folding frame composed of the hinge frame 402 and the hinge rod 401, expanding the extension space, thereby expanding the adjustment range.

[0050] The locking mechanism 5 further includes: a pawl 503 rotatably connected to the outer wall of the connecting shaft 403; ratchet teeth 502 arranged in an arc-shaped array on the inner wall of the arc-shaped groove 501; an annular groove 504 is formed on the outer wall of the connecting shaft 403, and a spiral spring 505 is installed on the inner wall of the annular groove 504, with both ends of the spiral spring 505 fixedly connected to the bottom end of the inner wall of the annular groove 504 and the inner wall of the pawl 503, respectively. Figure 8 , Figure 9 For example, the spiral spring 505 exerts a counterclockwise elastic thrust on the pawl 503;

[0051] When the connecting shaft 403 moves, the pawl 503 on its outer wall moves. When the pawl 503 moves, it rotates clockwise and squeezes the scroll spring 505 connected to its inner side when it passes the ratchet tooth 502. After passing through the ratchet tooth 502, the reset thrust of the scroll spring 505 will drive the pawl 503 to rotate counterclockwise and lock into the groove between two adjacent ratchet teeth 502, thereby restricting the position of the connecting shaft 403 in the arc groove 501. When the desktop 202 is lifted, its rear end drives the hinge frame 402 to rotate around the bolt 509 through the hinge rod 401, which drives the connecting shaft 403 to slide along the arc groove 501. When the connecting shaft 403 moves, the pawl 503 is squeezed by the ratchet tooth 502 and rotates clockwise and compresses the scroll spring 505. After passing the tooth tip, the scroll spring 505 resets and pushes the pawl 503 to lock into the tooth groove counterclockwise, locking the position of the connecting shaft 403 and fixing the angle of the desktop 202.

[0052] In this invention, during use, pulling the desktop panel 202 causes it to rotate upwards with its rotatable connection point with the front end of the table box 102 as the center; pulling the rear end of the desktop panel 202 causes the hinge rod 401 to rise, which in turn causes the hinge frame 402 to rotate with its rotatable connection point with the bolt 509 as the center; when the hinge frame 402 rotates, it causes the connecting shaft 403 to revolve along the inner wall of the arc-shaped groove 501, and simultaneously... Figure 8For example, when the desktop 202 is tilted, the hinge rod 401 pulls the hinge frame 402 to rotate clockwise. The hinge frame 402 drives the connecting shaft 403 to move clockwise along the arc groove 501. At the same time, the connecting shaft 403 will drive the pawl 503, which is elastically connected to its outer wall, to move. When the pawl 503 moves, it will rotate clockwise when it passes the ratchet tooth 502 and squeeze the spiral spring 505 connected to its inner side. After passing through the ratchet tooth 502, the return thrust of the spiral spring 505 will drive the pawl 503 to rotate counterclockwise and engage with the two adjacent ratchet teeth 502. The connecting shaft 403 is positioned within the arc-shaped groove 501, thus limiting the height of the hinge rod 401. The angle of the desktop 202 is controlled by limiting the height of the hinge rod 401 through the connecting shaft 403. The angle can be limited without repeatedly disassembling the bolt 509 when adjusting the angle. At the same time, multiple angles can be adjusted to expand the range of applications. The pawl 503 forms a one-way meshing self-locking with the ratchet tooth 502 under the action of the spiral spring 505, effectively resisting the reverse torque generated by the desktop load, avoiding accidental slippage caused by external force after adjustment, and ensuring the reliability of angle fixation.

[0053] When it is necessary to restore the surface to a flat state, the tabletop 202 can be laid flat after the pawl 503 is disengaged from the two adjacent ratchet teeth 502 and the contact restriction is lifted.

Claims

1. A multi-functional student desk and chair with lifting function, comprising height-adjustable desk legs (101), a desk box (102) for storage and a desk panel (202), characterized in that, One end of the desktop panel (202) is rotatably connected to one end of the top of the desk box (102), and has two forms of horizontal working position and inclined working position; the other end is provided with an angle maintaining mechanism between the bottom of the desktop panel (202) and the desk box (102). The angle maintaining mechanism comprises a support rod assembly (3) arranged at the bottom end of the desktop panel (202) and a locking mechanism (5) arranged on the desk box (102), and when the desktop panel (202) is in the inclined position, the support rod assembly (3) is matched by the locking mechanism (5) to realize multi-angle fixation of the desktop panel (202).

2. The multi-functional student desk and chair of claim 1, wherein, The support rod assembly comprises a hinged frame (4), the top end of the hinged frame (4) is rotatably connected to the bottom of the desktop panel (202), and a through hole (506) is formed on the side of the hinged frame (4) away from the desktop panel (202); and a positioning hole (507) is formed on the side wall of the desk box (102).

3. The multi-functional student desk and chair of claim 2, wherein, The locking mechanism (5) comprises a bolt (509) mounted in the positioning hole (507), the screw rod of the bolt (509) is threadedly connected with the inner wall of the positioning hole (507) through the through hole (506), and the outer wall of the screw rod is rotatably connected with the inner wall of the through hole (506).

4. The multi-functional student desk and chair of claim 2, wherein, The through hole (506) is a vertical slot.

5. The multi-functional student desk and chair of claim 4, wherein, The hinged frame (4) comprises: A hinged rod (401), the top end of the hinged rod (401) is rotatably connected to the bottom of the desktop panel (202); A hinged frame (402), the top of the hinged frame (402) is rotatably connected to the bottom of the hinged rod (401), and the through hole (506) is formed on the bottom of the hinged frame (402).

6. The multi-functional student desk and chair of claim 5, wherein, The top outer side of the hinged frame (402) is fixedly connected with a connecting shaft (403), an arc-shaped groove (501) is formed on the side wall of the desk box (102), and the center of the arc-shaped groove (501) is coaxial with the positioning hole (507).

7. The multi-functional student desk and chair of claim 6, wherein, The locking mechanism (5) further comprises: A resilient clamping jaw (503) rotatably connected to the outer wall of the connecting shaft (403); An arc-shaped array of ratchet teeth (502) distributed on the inner wall of the arc-shaped groove (501).

8. The multi-functional student desk and chair of claim 7, wherein, An annular groove (504) is formed on the outer wall of the connecting shaft (403), a volute spring (505) is mounted on the inner wall of the annular groove (504), and the two ends of the volute spring (505) are fixedly connected with the inner wall bottom end of the annular groove (504) and the inner wall of the clamping jaw (503), respectively. The clamping jaw (503) is in one-way meshing self-locking with the ratchet teeth (502) under the action of the volute spring (505), effectively resisting the reverse torque generated by the desktop load.

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