Student table and chair with automatic lifting function

Abstract

The invention relates to the technical field of student desks and chairs, in particular to a student desk and chair with an automatic lifting function. The invention provides a student desk and chair with an automatic lifting function, which comprises a support frame, a desk controlled to lift is arranged on the support frame, a cushion is arranged on the support frame, a backrest controlled to rotate is arranged on the cushion, two groups of electric push rods are mounted on the support frame, the electric push rods are fixedly connected with the desk, the desk is connected to the support frame in a sliding manner, and the backrest is connected to the support frame in a sliding manner. A control panel is arranged on the desk, the control panel is in electric signal connection with the electric push rod, multiple modes are arranged in the control panel, through the integrated structural design of the desk, the seat cushion and the backrest, daily teaching requirements are met, the height of the desk is adjusted by adjusting and controlling lifting of the desk, and when an earthquake occurs, a temporary danger avoiding space is provided for students; the student injury risk is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of student desks and chairs, and in particular to a student desk and chair with automatic lifting function. Background Art

[0002] Student desks and chairs are supporting furniture designed specifically for school students. They are usually composed of desks (including: desktop, supporting structure) and seats (including: seat, backrest), used to support learning activities. Their design must comply with ergonomics, safety standards and educational scenario requirements. They are widely used in traditional classrooms, multi-functional learning spaces, and home learning areas.

[0003] In earthquake-prone areas, most traditional student desks and chairs are independent structures and lack an overall structural design. During an earthquake, the independent-structured traditional desks and chairs cannot be adjusted in an emergency, and the desktop design does not take anti-smashing protection into consideration, making them unable to serve as temporary shelters.

[0004] Based on the above situation, there is an urgent need for a student desk and chair with automatic lifting function to realize the overall structural design of the desk and chair. When an earthquake occurs, the automatic lifting of the desktop can provide a temporary shelter, reduce the risk of student injury, and take into account daily teaching needs. Summary of the Invention

[0005] According to the problems raised in the background technology, the present invention provides a student desk and chair with automatic lifting function to solve the problems. The present invention will be further explained below.

[0006] A student desk and chair with automatic lifting function includes a support frame, a desk with controlled lifting function is provided on the support frame, a seat cushion is provided on the support frame, and a backrest with controlled rotation is provided on the seat cushion. Two groups of electric push rods are installed on the support frame, and the electric push rods are fixedly connected to the desk, and the desk is slidably connected to the support frame. A control panel is provided on the desk, and the control panel is connected to the electric push rod by electrical signals, and multiple modes are set in the control panel.

[0007] Preferably, a protective plate is provided on the desk, and two sets of screws are provided on the desk. The screws are threadedly connected to the protective plate, and a first gear is provided on the screws. Two sets of fixing rods are provided on the support frame, and the fixing rods are provided with a first rack. The first rack is engaged with the first gear to realize the lifting and lowering of the protective plate.

[0008] Preferably, the protective plate is provided with a first stretching rod and a second stretching rod, and an angle is formed between the first stretching rod and the second stretching rod. The first stretching rod and the second stretching rod are provided with pillars, and the pillars are fixed to the desk to achieve stable support for the desk.

[0009] Preferably, a seat cushion is provided on the support frame, a sliding frame is provided on the seat cushion, a handle is provided on the sliding frame, two symmetrically distributed guide rods are provided on the support frame, a sliding groove is provided on the guide rods, and the sliding frame slides in the sliding groove to lock the seat cushion.

[0010] Preferably, the sliding frame is provided with a second rack, the supporting frame is provided with a rotating shaft, the rotating shaft is provided with a backrest, the backrest is provided with two symmetrically distributed second gears, the second gears are both connected to the rotating shaft, and the second rack is engaged with the second gear to achieve angle adjustment of the backrest.

[0011] Preferably, the desk is provided with two symmetrically distributed straight rods, and the straight rods are contact-connected to the support frame. A locking frame is provided on the straight rod, and the locking frame restricts the seat cushion. The locking frame is slidably connected to the support frame. A lock buckle is provided on the handle, and a friction surface is provided on the lock buckle. A first spring is provided between the lock buckle and the handle to lock the seat cushion.

[0012] Preferably, an emergency box is provided on the desk, the emergency box is provided with an opening, the emergency box is provided with a closing plate, the support frame is provided with a fixed plate, the fixed plate is provided with two groups of support members, the support members are provided with a wedge block, the fixed plate is provided with a movable plate, the movable plate is fixedly connected to the desk, the emergency box is provided with a short column, the short column is provided with a locking member, the locking member is connected to the closing plate with mortise and tenon joints, a second spring is provided between the locking member and the short column, the locking member is provided with a pin, the pin is squeezed and matched with the wedge block to realize the movement of the closing plate.

[0013] Preferably, a protective shell is provided on the first gear to protect the first gear.

[0014] Preferably, a protective cover is provided on the seat cushion to protect relevant components of the avoidance assembly.

[0015] Beneficial effects: Compared with the existing technology, this device adjusts the electric push rod and then adjusts the desk height through multiple modes of the control panel to meet different usage needs. Through the cooperation of the lifting component, the support component, and the protective component, it is realized that in the avoidance mode, sufficient risk avoidance and anti-smashing protection space is provided, which is convenient for users to avoid; by locking the straight rod and the locking frame, the lock is tightly pressed against the side walls of the guide rod and the sliding frame, so that the seat cushion cannot move, which is convenient for daily use. In the risk avoidance mode, the lock is manually pushed to unlock the straight rod and the locking frame, and the handle is manually pushed backward to move the sliding frame backward in the slide groove of the guide rod, thereby driving the seat cushion to move backward, thereby achieving the avoidance effect of the seat cushion, which is convenient for users to avoid; through the extrusion cooperation of the pin and the wedge block, the sealing plate cancels the obstruction of the open part of the emergency box, which is convenient for taking items in the emergency box. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 : Schematic diagram of the three-dimensional structure of the present invention;

[0017] Figure 2 : A schematic structural diagram of the first gear, the first stretching rod, the second stretching rod and other components of the present invention;

[0018] Figure 3 : Schematic diagram of the structure of the protective plate, screw, first gear and other components of the present invention;

[0019] Figure 4 : A schematic structural diagram of the sliding frame, the second rack, the second gear and other components of the present invention;

[0020] Figure 5 : Schematic diagram of the structure of the locking member, second spring, sealing plate and other components of the present invention;

[0021] Figure 6 : Structural diagram of the sealing plate, emergency box and desk of the present invention;

[0022] Figure 7 : A schematic diagram of the structure of the movable plate, fixed plate, latch and other components of the present invention;

[0023] In the figure: 1-support frame, 11-desk, 111-straight rod, 12-cushion, 13-backrest, 2-electric push rod, 21-control panel, 211-fixed rod, 22-first rack, 23-first gear, 24-first stretching rod, 241-second stretching rod, 25-pillar, 26-protective plate, 27-screw, 28-protective shell, 3-locking frame, 31-sliding frame, 32-second rack, 33-second gear, 34-lock, 35-first spring, 36-handle, 37-guide rod, 38-rotating shaft, 4-fixed plate, 41-wedge block, 42-locking piece, 421-latch, 43-second spring, 44-sealing plate, 45-emergency box, 451-short column, 46-support member, 47-movable plate. DETAILED DESCRIPTION

[0024] Next, combine Figure 1-Figure 7 A specific embodiment of the present invention is described in detail.

[0025] refer to Figure 1A student desk and chair with automatic lifting, including a support frame 1, as the load-bearing body of the overall structure, is made of high-strength metal frame material to ensure stability and earthquake resistance. A desk 11 with controlled lifting is provided on the support frame 1, and a seat cushion 12 is slidably connected to the support frame 1, which can be moved back and forth to adjust the sitting distance. The seat cushion 12 is provided with a controlled rotation backrest 13, and the seat cushion 12 and the backrest 13 constitute a seat structure. This device meets daily teaching needs through the integrated structural design of the desk 11, the seat cushion 12 and the backrest 13. By regulating the lifting of the desk 11, and then adjusting the height of the desk 11, a temporary shelter space is provided for students in the event of an earthquake, reducing the risk of student injury.

[0026] refer to Figure 1 and Figure 2 This device realizes the lifting and lowering action of the desk 11 through a lifting component. Two sets of electric push rods 2 are installed on the support frame 1. The telescopic ends of the electric push rods 2 are fixedly connected to the desk 11, and the ends of the desk 11 are slidably connected to the support frame 1. The lifting height of the desk 11 is regulated by the electric push rods 2. On the one hand, the height can be adjusted in a small range according to the height differences of students. On the other hand, when an earthquake occurs, the desk 11 is directly adjusted to rise to the maximum height to provide sufficient shelter space.

[0027] The desk 11 is provided with a control panel 21 for adjusting the movement of the electric push rod 2. The control panel 21 is electrically connected to the electric push rod 2. At the same time, a variety of modes are provided in the control panel 21, aiming to provide different command signals to the electric push rod 2 for intelligently controlling the lifting height of the desk 11 to meet different usage requirements.

[0028] In daily teaching scenarios, the touch control panel 21 selects the corresponding mode, controls the start of the electric push rod 2, and links the lifting and lowering of the desk 11 to meet the needs of students with different height differences.

[0029] When a dangerous situation occurs, the touch control panel 21 selects the avoidance mode, controls the electric push rod 2, and links the desk 11 to rise to the limit height to provide enough avoidance space for users to avoid.

[0030] refer to Figure 2 and Figure 3, in order to better protect the user when a dangerous situation occurs, this device is implemented through a protective component. A protective plate 26 is retractably slidably connected to the desk 11. The protective plate 26 is made of a high-strength metal frame. When a dangerous situation occurs, the protective plate 26 can be pulled out in a controlled manner to achieve anti-smashing protection. Two sets of screws 27 are connected to the desk 11. The screws 27 are threadedly connected to the two ends of the protective plate 26. The withdrawal action of the protective plate 26 depends on the rotation of the screws 27. The ends of the screws 27 that pass through the desk 11 are keyed to the first gear 23. Two sets of fixed rods 211 are fixed to the support frame 1. The ends of the fixed rods 211 are fixed to the first racks 22. The first racks 22 are engaged with the first gear 23 to provide rotational power to the screws 27.

[0031] In particular, only in the avoidance mode, when the desk 11 rises to the limit height, can the first rack 22 and the first gear 23 engage with each other. In other modes, the first rack 22 and the first gear 23 cannot engage with each other.

[0032] Initially, the protective plate 26 is hidden in the desk 11. In a dangerous situation, the desk 11 rises to its maximum height, and the first gear 23 is linked, and the screw 27 and the protective plate 26 move up. When the first gear 23 moves up to a certain height, the first gear 23 contacts and engages with the first rack 22, the first gear 23 rotates, and the linked screw 27 rotates, and the protective plate 26 is controlled to move outward in parallel, that is, the protective plate 26 and the desk 11 together constitute a protective top plate structure, providing sufficient anti-smashing protection space.

[0033] refer to Figure 2 In order to enhance the seismic performance of the desk 11, a support assembly is used to achieve this. The upper and lower side walls of the protective plate 26 are connected with a retractable first stretching rod 24 and a second stretching rod 241. The first stretching rod 24 and the second stretching rod 241 form an angle. The ends of the first stretching rod 24 and the second stretching rod 241 are connected with pillars 25. The pillars 25 are fixed to the bottom wall of the desk 11. As the protective plate 26 moves, one end of the first stretching rod 24 and the second stretching rod 241 moves, and then the first stretching rod 24 and the second stretching rod 241 are expanded, so that a dynamic and stable triangular structure is formed between the first stretching rod 24, the second stretching rod 241 and the desk 11, thereby improving the overall anti-tilting and seismic resistance of the device.

[0034] refer to Figure 4In the avoidance mode, the seat cushion 12 of this device needs to move to an avoidance position to facilitate the user to enter the avoidance space. Therefore, this device realizes the movement of the seat cushion 12 through an avoidance component. The seat cushion 12 is slidably connected to the support frame 1, and sliding frames 31 are fixed on both sides of the seat cushion 12. The sliding frames 31 are fixed with handles 36. Two symmetrically distributed guide rods 37 are fixed on the support frame 1. The guide rods 37 are distributed on the left and right sides of the seat cushion 12. The guide rods 37 are each provided with a sliding groove, and the sliding frame 31 is slidably connected in the sliding groove.

[0035] Pushing the handle 36 backwards causes the sliding frame 31 to move backwards in the sliding groove of the guide rod 37, thereby driving the seat cushion 12 to move backwards, thereby achieving an avoidance effect of the seat cushion 12, making it easier for the user to avoid.

[0036] refer to Figure 1 and Figure 4 A second rack 32 is fixedly connected to the sliding frame 31, a rotating shaft 38 is fixed to the supporting frame 1, a backrest 13 is connected to the rotating shaft 38, and two symmetrically distributed second gears 33 are keyed to the backrest 13. The second gears 33 are both connected to the rotating shaft 38, and the second rack 32 is engaged with the second gear 33 to rotate the backrest 13 and adjust the angle.

[0037] In the avoidance mode, the sliding frame 31 moves backward, driving the second rack 32 to move backward, the second rack 32 engages with the second gear 33, the second gear 33 rotates, and the backrest 13 rotates in conjunction with the rotation of the backrest 13. The purpose is to flip the backrest 13 to form a protective plate to protect the user hiding under the desk 11 from injury.

[0038] refer to Figure 4 However, in daily use scenarios, the seat cushion 12 does not need to be out of position, so the present device is locked in the following manner: two symmetrically distributed straight rods 111 are fixed to the desk 11, and the bottoms of the straight rods 111 are contact-connected to the support frame 1, and the straight rods 111 are clamped with locking frames 3, and the ends of the locking frames 3 are limited to the rear side of the seat cushion 12, and the locking frames 3 are slidably connected to the support frame 1, and a lock buckle 34 is slidably connected to the handle 36, and a friction surface is provided on the lock buckle 34, and a first spring 35 is compressed between the lock buckle 34 and the handle 36, in order to use the elastic force of the first spring 35 to press the friction surface of the lock buckle 34 tightly against the guide rod 37 and the side wall of the sliding frame 31, thereby limiting the movement of the sliding frame 31 in the sliding groove of the guide rod 37.

[0039] Through the restriction of the friction surface of the lock buckle 34 against the guide rod 37 and the sliding frame 31, the locking frame 3 restricts the rearward movement of the seat cushion 12, thereby achieving the locking of the seat cushion 12 to meet daily use needs.

[0040] In daily use, the straight rod 111 is locked with the locking frame 3, and the lock buckle 34 is pressed tightly against the guide rod 37 and the side wall of the sliding frame 31. Pushing the handle 36 cannot achieve the effect of moving the seat cushion 12 backward, which is convenient for daily use. In the avoidance mode, it is necessary to manually push the lock buckle 34 to disengage the lock buckle 34 from the squeezing of the guide rod 37 and the side wall of the sliding frame 31, the first spring 35 is deformed, and the electric push rod 2 is started, and the linked desk 11 and the straight rod 111 rise to the limit height. In this mode, the straight rod 111 is unlocked from the locking frame 3, and the handle 36 is manually pushed backward to make the sliding frame 31 move backward in the slide groove of the guide rod 37, thereby driving the seat cushion 12 to move backward, thereby achieving the avoidance effect of the seat cushion 12, which is convenient for the user to avoid.

[0041] refer to Figure 5 , Figure 6 and Figure 7 In the avoidance mode, the device stores necessary items through the storage component, which is convenient for the avoiders to use in an emergency in case of danger. An emergency box 45 is fixed to the bottom of the desk 11. One side of the emergency box 45 is open. Emergency medicines are prepared in the emergency box 45. A sealing plate 44 is slidably connected to the open side of the emergency box 45. This sealing plate 44 is only opened under control in the avoidance mode. A fixed plate 4 is fixed to the support frame 1. Two groups of support members 46 are fixed to the inner side of the fixed plate 4. The ends of the support members 46 are fixed with wedge blocks 41. A movable plate 47 is telescopically slidably connected to the fixed plate 4. The end of the movable plate 47 is fixedly connected to the bottom of the desk 11, and the movement of the desk 11 is linked to the movement of the movable plate 47. A short column 451 is fixedly connected to the rear side of the emergency box 45, and a locking piece 42 is slidably connected to the short column 451. The locking piece 42 is connected to the end of the closing plate 44 with a mortise and tenon joint, that is, the locking piece 42 is locked to the end of the closing plate 44, so that the closing plate 44 is maintained at the opening of the emergency box 45. A second spring 43 is compressed between the locking piece 42 and the short column 451, and the two side walls of the locking piece 42 are fixed with a pin 421, and the pin 421 is squeezed and fitted with the wedge block 41 to move the locking piece 42.

[0042] In a dangerous situation, as the desk 11 moves upward, the movable plate 47, the emergency box 45, the closing plate 44, and the short column 451 move upward, and the locking member 42 and the latch 421 move upward synchronously. The latch 421 moves upward to squeeze the wedge block 41, driving the locking member 42 to move backward. The second spring 43 deforms and moves backward with the locking member 42. The mortise and tenon connection between the locking member 42 and the end of the closing plate 44 is cancelled, that is, the locking member 42 and the closing plate 44 are unlocked, the closing plate 44 is not restricted and moves downward, thereby removing the obstruction to the open part of the emergency box 45, making it easier for the evader to take items.

[0043] refer to Figure 2 and Figure 7The cooperation between the fixed plate 4 and the movable plate 47 can protect the storage component and avoid external interference with the normal operation of the parts. A protective shell 28 is provided on the first gear 23 to protect the first gear 23 and avoid accidental touch. Protective covers (not shown in the figure) are provided on both sides of the seat cushion 12 to protect the relevant components of the avoidance component.

[0044] In summary, the device adjusts the electric push rod 2 and then adjusts the height of the desk 11 through the multiple modes of the control panel 21 to meet different usage requirements. Through the cooperation of the lifting component, the support component, and the protective component, sufficient risk avoidance and anti-smashing protection space is provided in the avoidance mode, which is convenient for the user to avoid; through the locking of the straight rod 111 and the locking frame 3, the lock buckle 34 is pressed tightly against the side wall of the guide rod 37 and the sliding frame 31, so that the seat cushion 12 cannot move, which is convenient for daily use. In the risk avoidance mode, the lock buckle 34 is manually pushed to unlock the locking frame 3 on the straight rod 111, and the handle 36 is manually pushed backward to make the sliding frame 31 move backward in the slide groove of the guide rod 37, thereby driving the seat cushion 12 to move backward, thereby achieving the avoidance effect of the seat cushion 12, which is convenient for the user to avoid; through the extrusion cooperation of the latch 421 and the wedge block 41, the sealing plate 44 removes the obstruction of the open part of the emergency box 45, which is convenient for taking the items in the emergency box 45.

[0045] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A student desk and chair with automatic lifting function, comprising a support frame (1), characterized in that: The support frame (1) is provided with a desk (11) capable of controlled lifting, a seat cushion (12) is provided on the support frame (1), and a backrest (13) capable of controlled rotation is provided on the seat cushion (12). Two groups of electric push rods (2) are installed on the support frame (1), the electric push rods (2) are fixedly connected to the desk (11), and the desk (11) is slidably connected to the support frame (1). A control panel (21) is provided on the desk (11), and the control panel (21) is electrically connected to the electric push rods (2). The control panel (21) is provided with multiple modes.

2. The student desk and chair with automatic lifting function according to claim 1, characterized in that: The desk (11) is provided with a protective plate (26), the protective plate (26) is made of a high-strength metal frame material, the desk (11) is provided with two sets of screw rods (27), the screw rods (27) are threadedly connected to the protective plate (26), the screw rods (27) are provided with a first gear (23), the support frame (1) is provided with two sets of fixed rods (211), the fixed rods (211) are provided with a first rack (22), and the first rack (22) is engaged with the first gear (23).

3. The student desk and chair with automatic lifting function according to claim 2, characterized in that: A first stretching rod (24) and a second stretching rod (241) are provided on the protective plate (26), an angle is formed between the first stretching rod (24) and the second stretching rod (241), and pillars (25) are provided on the first stretching rod (24) and the second stretching rod (241), and the pillars (25) are both fixedly connected to the desk (11).

4. The student desk and chair with automatic lifting function according to claim 2, characterized in that: The support frame (1) is provided with a seat cushion (12), the seat cushion (12) is provided with a sliding frame (31), the sliding frame (31) is provided with a handle (36), the support frame (1) is provided with two symmetrically distributed guide rods (37), the guide rods (37) are provided with sliding grooves, and the sliding frame (31) is slidably connected in the sliding grooves.

5. The student desk and chair with automatic lifting function according to claim 4 is characterized in that: The sliding frame (31) is provided with a second rack (32), the supporting frame (1) is provided with a rotating shaft (38), the rotating shaft (38) is provided with a backrest (13), the backrest (13) is provided with two symmetrically distributed second gears (33), the second gears (33) are both connected to the rotating shaft (38), and the second rack (32) is meshed with the second gear (33).

6. The student desk and chair with automatic lifting function according to claim 2, characterized in that: The desk (11) is provided with two symmetrically distributed straight rods (111), and the straight rods (111) are both contact-connected to the support frame (1). The straight rods (111) are provided with a locking frame (3), and the locking frame (3) restricts the seat cushion (12). The locking frame (3) is slidably connected to the support frame (1). The handle (36) is provided with a lock buckle (34), and the lock buckle (34) is provided with a friction surface. A first spring (35) is provided between the lock buckle (34) and the handle (36).

7. The student desk and chair with automatic lifting function according to claim 6, characterized in that: The desk (11) is provided with an emergency box (45), one side of the emergency box (45) is open, the emergency box (45) is provided with a sealing plate (44), the sealing plate (44) is controlled to open only in the risk avoidance mode, the support frame (1) is provided with a fixed plate (4), the fixed plate (4) is provided with two groups of support members (46), the support members (46) are provided with a wedge block (41), the fixed plate (4) is provided with a movable plate (47), and the The movable plate (47) is fixedly connected to the desk (11), the emergency box (45) is provided with a short column (451), the short column (451) is provided with a locking member (42), the locking member (42) is connected to the sealing plate (44) by mortise and tenon, a second spring (43) is provided between the locking member (42) and the short column (451), the locking member (42) is provided with a latch (421), and the latch (421) is squeezed and matched with the wedge block (41).

8. The student desk and chair with automatic lifting function according to claim 2, characterized in that: A protective shell (28) is provided on the first gear (23).

9. The student desk and chair with automatic lifting function according to claim 4, characterized in that: A protective cover is provided on the seat cushion (12).

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