Adjusting mechanism for stepless adjusting backrest reclining angle and lunch break chair

Abstract

The utility model provides a kind of adjusting mechanism of stepless adjusting backrest reclining angle and lunch break class chair.The adjusting mechanism includes fixed plate, rotating pipe and operating assembly.Fixed plate is used to install to seat plate pipe frame, and each fixed plate is provided with sitting posture stop pin and reclining stop plate;Rotating pipe is used to install backrest pipe frame, and the axial direction of rotating pipe is left and right direction, and rotating pipe is arranged between two fixed plates around its axial direction;Two ends of rotating pipe are provided with positioning member, and the bottom end of positioning member is threadedly connected with adjusting bolt;Operating assembly includes limiting member and linkage, and linkage connects two limiting members to make two limiting members rotate synchronously.Adjusting mechanism is a whole module, and it is convenient and fast to disassemble and assemble.By the cooperation of positioning member, sitting posture stop pin and limiting member, the rotation of rotating pipe can be limited, so as to adjust the posture of backrest pipe frame.By rotating adjusting bolt, the reclining angle of backrest pipe frame can be changed, so as to realize the stepless adjustment of reclining angle of backrest pipe frame, and it is convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of school chairs, and in particular to a school chair with a stepless adjustable backrest reclining angle. Background Technology

[0002] To facilitate students' lunch break, the chair backs are designed with an adjustable structure. In normal use, the backrest is upright or slightly tilted to help students maintain good posture. During lunch break, the backrest is tilted back at a larger angle so students can recline and achieve a better rest. However, in current technology, the chair backrest can only be adjusted to a fixed angle when reclining for lunch break; it cannot be adjusted vertically to suit different students' reclining positions, making it inconvenient to use. Furthermore, the existing adjustment mechanisms are complex and make backrest installation difficult. Utility Model Content

[0003] This utility model provides an adjustment mechanism for stepless adjustment of the backrest reclining angle and a lunch break chair, which facilitates adjustment of the backrest reclining angle and is easy to install.

[0004] On the one hand, this utility model provides an adjustment mechanism for steplessly adjusting the reclining angle of a backrest, used to adjust the angle between the backrest tube frame and the seat plate tube frame, including a fixed plate, a rotating tube and an operating component;

[0005] The fixing plate is used to install onto the seat plate tube frame. There are two fixing plates arranged in the left-right direction. Each fixing plate is provided with a sitting posture stop pin and a reclining baffle.

[0006] The rotating tube is used to install the backrest tube frame. The axis of the rotating tube is in the left-right direction and is rotatably arranged between the two fixed plates around its own axis. Both ends of the rotating tube are provided with positioning parts, and the bottom end of the positioning parts is threaded with an adjusting bolt.

[0007] The control component includes a limiting member and a linkage member. There are two limiting members, each of which is strip-shaped, and its front end is rotatably connected to each of the fixed plates in the left and right directions, and an elastic member is connected between them. The linkage member connects the two limiting members so that the two limiting members rotate synchronously. An elastic member is provided between the limiting member and the fixed plate.

[0008] When the rotating tube rotates to the backrest tube frame in a sitting position, the positioning member is positioned in the front-back direction between the rear end of the limiting member and the sitting position stop pin.

[0009] When the rear end of the limiting member rotates downward, the elastic member deforms to provide an upward rotational force to the limiting member. The rear end of the limiting member moves away from the front side of the positioning member to release the limiting of the positioning member. The rotating tube and the backrest tube frame can rotate backward to a reclining state. One end of the adjusting bolt abuts against the reclining baffle for stepless adjustment of the reclining angle of the backrest tube frame.

[0010] The rotating tube has insertion holes on its wall for installing the backrest support.

[0011] The outer diameter of the rotating tube is 1.3-2 times the diameter of the insertion hole.

[0012] The positioning component includes a rotating part and a positioning part. One end of the rotating tube is fixedly connected to the rotating part and rotates with the fixed plate through the rotating part. The rotating part is a circular plate with an outer diameter that matches the inner diameter of the rotating tube. The positioning part is connected to the bottom of the rotating part, and the front and rear sides of the positioning part are respectively used to abut against the limiting component and the sitting posture stop pin.

[0013] The linkage component includes a linkage shaft and a control lever. The two ends of the linkage shaft are respectively connected to the two limiting components. The front end of the control lever is connected to the linkage shaft, and the rear end extends backward and protrudes from the rotating tube.

[0014] Wherein, the distance between the linkage shaft and the rear end of the limiting member is less than the distance between the linkage shaft and the front end of the limiting member.

[0015] The front end of the control lever is connected to the middle position in the left-right direction of the linkage shaft.

[0016] Specifically, when the rotating tube is rotated to the point where the backrest tube frame is in a seated position, the rear end of the control lever extends horizontally, or the rear end of the control lever extends diagonally downwards, with an angle of less than 20° between it and the horizontal direction.

[0017] The inclined baffle is vertically fixed to the fixed plate, and one side of its plate surface is used to abut against the adjusting bolt.

[0018] The fixed plate is further provided with a reinforcing plate and a connecting plate. The reinforcing plate and the connecting plate are both perpendicular to the fixed plate. The reinforcing plate is perpendicular to the inclined baffle, and one end of the reinforcing plate abuts against the other surface of the inclined baffle. One end of the connecting plate is connected to the other end of the reinforcing plate, and the two are intersecting. The connecting plate is connected to one end of the elastic member.

[0019] On the other hand, this utility model provides a lunch break chair, including a seat frame, a backrest frame, and the aforementioned stepless adjustment mechanism for adjusting the reclining angle of the backrest. The fixed plate of the adjustment mechanism is connected to the seat frame, and the rotating tube of the adjustment mechanism is connected to the backrest frame.

[0020] This utility model provides a stepless adjustable backrest reclining angle adjustment mechanism and a nap chair. The fixed plate facilitates the assembly and connection between the seat frame and the adjustment mechanism, making it easy to install the adjustment mechanism onto the seat frame. The rotating tube facilitates the assembly and connection between the backrest frame and the adjustment mechanism, making the installation of the backrest frame convenient. The adjustment mechanism is a single module, allowing for quick and easy assembly and disassembly. The positioning component, along with the sitting posture stop and limiting component, restricts the rotation of the rotating tube, thus allowing for posture adjustment of the backrest frame. Rotating the adjusting bolt changes the reclining angle of the backrest frame, achieving stepless adjustment of the backrest frame's reclining angle, making it convenient to use. Attached Figure Description

[0021] Figure 1 A schematic diagram of the structure of the lunch break chair in a seated position, provided in a preferred embodiment of this utility model;

[0022] Figure 2 yes Figure 1 A vertical sectional view of a classroom chair in a seated position during lunch break;

[0023] Figure 3 yes Figure 2 A vertical sectional view of a classroom chair in a reclining position during lunch break;

[0024] Figure 4 yes Figure 3 A diagram showing the adjustment bolts on the lunch break chair in a reclining position.

[0025] Figure 5 yes Figure 1 A schematic diagram of the adjustment mechanism for the lunch break chairs;

[0026] Figure 6 yes Figure 5 A schematic diagram of the adjustment mechanism from another angle;

[0027] Figure 7 yes Figure 5 Exploded view of the central adjustment mechanism;

[0028] Figure 8 yes Figure 7 A exploded view of the central adjustment mechanism from another angle. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] In the diagram, units with similar structures are represented by the same labels.

[0031] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 This utility model provides a lunch break chair, which includes a seat frame 200, a backrest frame 300, and an adjustment mechanism 100 for infinitely adjusting the reclining angle of the backrest. The backrest frame 300 is provided with a backrest mounting hole for mounting the backrest; the top of the seat frame 200 is provided with a seat mounting hole for mounting the seat. The adjustment mechanism 100 is connected between the backrest frame 300 and the seat frame 200, and is used to adjust the angle between the backrest frame 300 and the seat frame 200, so that the backrest frame 300 can switch between a sitting position and a reclining position.

[0032] The adjustment mechanism 100 includes a fixed plate 1, a rotating tube 2, and an operating component 3. The fixed plate 1 is used to install onto the seat frame 200. Two fixed plates 1 are arranged in a left-right direction, and each fixed plate 1 is provided with a sitting posture stop pin 11 and a reclining baffle 12. The sitting posture stop pin 11 and the reclining baffle 12 are used to position the backrest frame 300 in two states, respectively. It can be understood that in this embodiment, the left-right direction, front, and back refer to the orientation when the user normally uses the lunch break chair. Figure 2 As shown, Figure 2 The left side of the image represents the front, and the right side represents the back.

[0033] Since the backrest tube frame 300 is connected to the upper rear side of the seat tube frame, the adjustment mechanism 100 is installed at the upper rear side of the seat tube frame. Furthermore, the fixing plate 1 is fixedly connected to the upper rear side of the seat tube frame.

[0034] The rotating tube 2 is used to install the backrest tube frame 300. Its axis is in the left and right direction. The rotating tube 2 is rotated around its own axis and is set between two fixed plates 1. Both ends of the rotating tube 2 are provided with positioning parts 21. The bottom end of the positioning part 21 is threaded with an adjusting bolt 22. The adjusting bolt 22 is used to realize the stepless adjustment of the angle of the backrest tube frame 300 in the inclined state.

[0035] The control assembly 3 includes two limiting members 31 and a linkage member 32. Each limiting member 31 is strip-shaped, with its front end rotatably connected to each fixed plate 1 in a left-right direction. An elastic member 33 connects the two limiting members 31, which is used to reset the limiting member 31 upwards after downward rotation. The linkage member 32 connects the two limiting members 31, enabling them to rotate synchronously.

[0036] like Figure 3 As shown, when the rotating tube 2 rotates to the backrest tube frame 300 in a sitting position, the positioning member 21 is positioned in the front-back direction between the rear end of the limiting member 31 and the sitting position stop pin 11, so that the backrest tube frame 300 cannot rotate back and forth, thus reliably positioning itself in a sitting position, which is convenient for students to use in class and study.

[0037] like Figure 4 As shown, when the rear end of the limiting member 31 rotates downward, the elastic member 33 deforms, thereby providing an upward rotational force to the limiting member 31. The rear end of the limiting member 31 moves away from the front side of the positioning member 21 to release the limiting of the positioning member 21. The rotating tube 2 and the backrest tube frame 300 can rotate backward to the inclined position. One end of the adjusting bolt 22 abuts against the inclined baffle 12 for stepless adjustment of the inclined angle of the backrest tube frame 300.

[0038] The deformation of the elastic element 33 can generate an upward force on the rear end of the limiting element 31, facilitating the upward reset of the limiting element 31. In this embodiment, the elastic element 33 is a tension spring for ease of installation. When the rear end of the limiting element 31 moves downward, the elastic element 33 stretches and deforms to provide a reset force to the limiting element 31. Of course, in other embodiments, the elastic element 33 can also be a compression spring, torsion spring, or other forms of elastic element 33.

[0039] like Figure 3 and Figure 4 As shown, by rotating the adjusting bolt 22, the distance between one end of the adjusting bolt 22 and the positioning part 21 can be changed. When one end of the adjusting bolt 22 abuts against the inclined baffle 12, the inclined angle of the backrest tube frame 300 can be changed. The user can rotate the adjusting bolt 22 as needed to adjust the tilt angle of the backrest tube frame 300 to a suitable state, thereby realizing stepless adjustment of the inclined angle of the backrest tube frame 300, which is convenient to use.

[0040] To adjust the lunch break chair from a sitting position to a reclining position, simply move the linkage 32 downwards, causing the rear ends of the two limiting members 31 to move downwards simultaneously. This releases the position lock on the positioning member 21, allowing the rotating tube 2 and the backrest frame 300 to rotate. The user can then flip the backrest frame 300 backwards to adjust it to the reclining position. To return to the sitting position, the user flips the backrest frame 300 forwards. The rotating tube 2 drives the two positioning members 21 to rotate. When the positioning member 21 abuts against the sitting position stop pin 11, the limiting member 31 rotates upwards under the action of the elastic member 33, causing the rear end of the limiting member 31 to move upwards to the front end of the positioning member 21. This limits the positioning member 21 between the rear end of the limiting member 31 and the sitting position stop pin 11, thus locking the backrest frame 300 in the sitting position. The lunch break chair's position adjustment is convenient, quick, and has a simple structure.

[0041] When assembling the lunch break chair, first connect the two fixing plates 1 to the seat plate tube frame 200 to install the entire adjustment mechanism 100 onto the seat plate tube frame 200; then connect the bottom end of the backrest tube frame 300 to the rotating tube 2 to complete the installation of the backrest tube frame 300. The adjustment mechanism 100 is a whole module, which is convenient and quick to assemble and disassemble.

[0042] The rotating tube 2 has insertion holes 20 on its wall for mounting the backrest support 300. The bottom of the backrest support 300 can be inserted into the insertion holes 20 and then fastened with screws or other fasteners to further facilitate the installation between the backrest support 300 and the adjustment mechanism 100. Of course, in other embodiments, the backrest support 300 can also be mounted on the rotating tube 2 using other structures or fastening devices.

[0043] The diameter of the insertion hole 20 is matched with the outer diameter of the backrest tube frame 300 so that the bottom of the backrest tube frame 300 can be inserted into the insertion hole 20. The outer diameter of the rotating tube 2 is 1.3-2 times the diameter of the insertion hole 20, that is, the outer diameter of the rotating tube 2 is 1.3-2 times the outer diameter of the backrest tube frame 300, making the rotating tube 2 a relatively thick tubular structural component, improving its connection strength with the backrest tube frame 300, and ensuring its rotational stability and reliability.

[0044] like Figure 7 and Figure 8As shown, the positioning component 21 includes a rotating part 211 and a positioning part 212. One end of the rotating tube 2 is fixedly connected to the rotating part 211 and rotates with the fixed plate 1 through the rotating part 211. The rotating part 211 is a circular plate, and its outer diameter matches the inner diameter of the rotating tube 2 to facilitate positioning and installation between the two. It is then fixedly connected by welding / screws or other methods. The positioning part 212 is connected to the bottom of the rotating part 211, and its front and rear sides are used to abut against the limiting component 31 and the sitting position stop pin 11, respectively. The rotating part 211 enables the assembly connection between the rotating tube 2 and the positioning component 21, as well as the rotational engagement between the rotating tube 2 and the fixed plate 1. The structure is simple and facilitates the assembly connection between the positioning component 21, the rotating tube 2, and the fixed plate 1. Bearings or other structures can be installed between the rotating part 211 and the fixed plate 1 to ensure the stability of the rotation of the rotating tube 2 and the backrest support 300.

[0045] The positioning component 21, the fixing plate 1, and the limiting component 31 are all integrally plate-shaped and parallel to each other, which facilitates assembly and ensures the stability and reliability of the rotation of the positioning component 21 and the limiting component 31.

[0046] like Figure 5 and Figure 7 As shown, an adjusting block 213 is provided on the side of the positioning part 212 opposite to the fixed plate 1. The adjusting block 213 is provided with a threaded hole, and the adjusting bolt 22 is threaded into the threaded hole to achieve a threaded fit between the positioning part 21 and the adjusting bolt 22. The adjusting block 213 can be welded to the positioning part 212 to improve the connection strength.

[0047] The inclined baffle 12 is vertically fixed to the fixed plate 1, and one side of its plate surface is used to abut against the adjusting bolt 22. The inclined baffle 12 has a large plate surface area, which can effectively ensure that the adjusting bolt 22 abuts against the inclined baffle 12, ensuring the reliability of the abutment between the two.

[0048] like Figure 3 and Figure 4 As shown, the fixed plate 1 is also provided with a reinforcing plate 13 and a connecting plate 14. Both the reinforcing plate 13 and the connecting plate 14 are perpendicular to the fixed plate 1. The reinforcing plate 13 is perpendicular to the inclined baffle 12, and one end of the reinforcing plate 13 abuts against the other surface of the inclined baffle 12. The reinforcing plate 13 can improve the structural strength of the inclined baffle 12 and ensure the reliability of the adjusting bolt 22 abutting against the inclined baffle 12. One end of the connecting plate 14 is connected to the other end of the reinforcing plate 13, and the two are intersecting to improve the overall structural strength. The connecting plate 14 is connected to one end of the elastic element 33 to facilitate the assembly of the elastic element 33, and at the same time, it makes the elastic element 33 located on the side of the inclined baffle 12 away from the adjusting bolt 22, avoiding mutual interference between the adjusting bolt 22 and the elastic element 33.

[0049] like Figure 5 and Figure 6As shown, the linkage 32 includes a linkage shaft 321 and a control lever 322. Both ends of the linkage shaft 321 are connected to two limiting members 31. The front end of the control lever 322 is connected to the linkage shaft 321, and its rear end extends rearward and protrudes from the rotating tube 2. By moving the rear end of the control lever 322 downward, the user can drive the rear ends of the two limiting members 31 downward via the linkage shaft 321, making operation convenient. The rear end of the control lever 322 protrudes rearward relative to the rotating tube 2, facilitating the user to apply force to the rear end of the control lever 322. The user can move the control lever 322 downward by stepping on it or using a foot pedal.

[0050] The distance between the rear end of the linkage shaft 321 and the limiting member 31 is less than the distance between the front end of the linkage shaft 321 and the limiting member 31, which makes the linkage shaft 321 closer to the rear end of the limiting member 31, which is conducive to transmitting the force to the rear end of the limiting member 31 and causing it to move downward.

[0051] The front end of the control lever 322 is connected to the middle position in the left-right direction of the linkage shaft 321 so that the force of the control lever 322 can be transmitted evenly to the two limiting members 31 through the linkage shaft 321.

[0052] like Figure 2 As shown, when the rotating tube 2 is rotated to the backrest tube frame 300 in a seated position, the rear end of the control lever 322 extends horizontally, or the rear end of the control lever 322 extends obliquely downward, with an angle of less than 20° with the horizontal direction, so as to facilitate the user to apply a downward force to the rear end of the control lever 322.

[0053] The adjustment mechanism 100 also includes a foot pedal (not shown in the figure). The foot pedal is located at the rear end of the control lever 322, and the upper surface of the foot pedal is marked with the word "step" or "step" to clearly indicate the operation method to the user. When the user steps on the foot pedal, the control lever 322 can be rotated downwards. The user can use their foot to operate the control lever 322 to unlock the backrest frame 300, while simultaneously rotating the backrest frame 300 by hand, facilitating operation.

[0054] The foot pedal can be made of plastic so that it can be injection molded, making it easy to form a conspicuous "step" or "step" mark on its surface. The foot pedal can be provided with a connection hole (not shown in the figure). After the end of the control lever 322 is inserted into the insertion hole 20, the two are fixed with screws to ensure a firm and reliable connection.

[0055] The stepless adjustable reclining chair provided by this utility model allows the user to step on the rear end of the control lever 322 while in a seated position. This causes the control lever 322 to move downwards, which in turn moves the linkage rod downwards. This causes the rear ends of the two limiting members 31 to disengage from the positioning member 21, allowing the positioning member 21 and the rotating tube 2 to rotate. This unlocks the backrest frame 300, allowing the backrest frame 300 and the rotating tube 2 to rotate backwards until the adjusting bolt 22 on the backrest frame 300 touches the reclining baffle 12 on the fixing plate 1. The chair then shifts to a reclining position suitable for a midday nap. In a reclining position, the backrest support 300 is rotated upwards to an upright or nearly upright position. The positioning component 21 and the rotating tube 2 rotate under the influence of the backrest support 300 until the positioning component 21 touches the sitting position stop pin 11. At the same time, the limiting component 31 rotates upwards under the action of the elastic component 33 until the rear end of the limiting component 31 abuts against the positioning protrusion. The backrest is in a sitting position. The positioning component 21 is locked in position by the sitting position stop pin 11 and the rear end of the limiting component 31, so that the rotating tube 2 will not rotate, thereby locking the backrest support 300 in a sitting position without shaking.

[0056] By rotating the adjusting bolt 22, the position of the adjusting bolt 22 on the positioning part 21 can be changed, and the reclining angle of the chair back can be adjusted steplessly.

[0057] The stepless adjustable backrest reclining angle adjustment mechanism 100 and the lunch break chair provided by this utility model utilize a fixing plate 1 to facilitate the assembly and connection between the seat frame 200 and the adjustment mechanism 100, thereby facilitating the installation of the adjustment mechanism 100 onto the seat frame 200. The rotating tube 2 facilitates the assembly and connection between the backrest frame 300 and the adjustment mechanism 100, thereby facilitating the installation of the backrest frame 300. The adjustment mechanism is a single module, making assembly and disassembly convenient and quick. Through the cooperation of the positioning component 21, the sitting posture stop pin 11, and the limiting component 31, the rotation of the rotating tube 2 can be restricted, thereby enabling the posture adjustment of the backrest frame 300.

[0058] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A stepless adjustment mechanism for adjusting the reclining angle of a backrest, used to adjust the angle between the backrest frame and the seat frame, characterized in that, Includes a fixed plate, a rotating tube, and an operating assembly; The fixing plate is used to install onto the seat plate tube frame. There are two fixing plates arranged in the left-right direction. Each fixing plate is provided with a sitting posture stop pin and a reclining baffle. The rotating tube is used to install the backrest tube frame. The axis of the rotating tube is in the left-right direction and is rotatably arranged between the two fixed plates around its own axis. Both ends of the rotating tube are provided with positioning parts, and the bottom end of the positioning parts is threaded with an adjusting bolt. The control component includes a limiting member and a linkage member. There are two limiting members, each of which is strip-shaped, and its front end is rotatably connected to each of the fixed plates in the left and right directions, and an elastic member is connected between them. The linkage member connects the two limiting members so that the two limiting members rotate synchronously. An elastic member is provided between the limiting member and the fixed plate. When the rotating tube rotates to the backrest tube frame in a sitting position, the positioning member is positioned in the front-back direction between the rear end of the limiting member and the sitting position stop pin. When the rear end of the limiting member rotates downward, the elastic member deforms to provide an upward rotational force to the limiting member. The rear end of the limiting member moves away from the front side of the positioning member to release the limiting of the positioning member. The rotating tube and the backrest tube frame can rotate backward to a reclining state. One end of the adjusting bolt abuts against the reclining baffle for stepless adjustment of the reclining angle of the backrest tube frame.

2. The stepless adjustment mechanism for the reclining angle of the backrest according to claim 1, characterized in that, The rotating tube has insertion holes on its wall for installing the backrest tube frame.

3. The stepless adjustment mechanism for the reclining angle of the backrest according to claim 2, characterized in that, The outer diameter of the rotating tube is 1.3-2 times the diameter of the insertion hole.

4. The stepless adjustment mechanism for the reclining angle of the backrest according to claim 3, characterized in that, The positioning component includes a rotating part and a positioning part. One end of the rotating tube is fixedly connected to the rotating part and rotates with the fixed plate through the rotating part. The rotating part is a circular plate with an outer diameter that matches the inner diameter of the rotating tube. The positioning part is connected to the bottom of the rotating part, and the front and rear sides of the positioning part are respectively used to abut against the limiting component and the sitting posture stop pin.

5. The stepless adjustment mechanism for the reclining angle of the backrest according to any one of claims 1-4, characterized in that, The linkage component includes a linkage shaft and a control lever. The two ends of the linkage shaft are respectively connected to the two limiting members. The front end of the control lever is connected to the linkage shaft, and the rear end extends backward and protrudes from the rotating tube.

6. The stepless adjustment mechanism for the reclining angle of the backrest according to claim 5, characterized in that, The distance between the linkage shaft and the rear end of the limiting member is less than the distance between the linkage shaft and the front end of the limiting member.

7. The stepless adjustment mechanism for the reclining angle of the backrest according to claim 5, characterized in that, The front end of the joystick is connected to the middle position in the left-right direction of the linkage shaft.

8. The stepless adjustment mechanism for the reclining angle of the backrest according to claim 5, characterized in that, When the rotating tube is rotated to the backrest tube frame in a seated position, the rear end of the control lever extends horizontally, or the rear end of the control lever extends diagonally downwards, with an angle of less than 20° between it and the horizontal direction.

9. The stepless adjustment mechanism for the reclining angle of the backrest according to any one of claims 1-4, characterized in that, The inclined baffle is vertically fixed to the fixed plate, and one side of its plate surface is used to abut against the adjusting bolt; The fixed plate is also provided with a reinforcing plate and a connecting plate. The reinforcing plate and the connecting plate are both perpendicular to the fixed plate. The reinforcing plate is perpendicular to the inclined baffle, and one end of the reinforcing plate abuts against the other surface of the inclined baffle. One end of the connecting plate is connected to the other end of the reinforcing plate, and the two are intersecting. The connecting plate is connected to one end of the elastic member.

10. A type of afternoon nap chair, characterized in that: It includes a seat plate frame, a backrest frame, and an adjustment mechanism for steplessly adjusting the reclining angle of the backrest as described in any one of claims 1-9, wherein the fixed plate of the adjustment mechanism is connected to the seat plate frame, and the rotating tube of the adjustment mechanism is connected to the backrest frame.

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