Pull handle type adjusting device and lunch break chair

Abstract

The utility model provides a kind of handle type adjusting device and lunch break class chair.Handle type adjusting device includes fixed part, rotating assembly, control and handle piece;Rotating assembly is connected around horizontal direction in fixed part;Control is the strip shape being set along longitudinal direction, and the longitudinal middle position of control is connected around horizontal direction in fixed part, and control is located in the front side of rotating assembly;Handle piece is set in the front end of control;When backrest is in sitting posture, the rear end of control is abutted with rotating assembly;When handle piece moves upward, the rear end of control moves downward and separates from rotating assembly, to release the limiting of rotating assembly, and backrest can be rotated to reclining position to rearward.The handle piece is set in the front end of control, relatively close to user, and user only needs to pull handle piece upward on lunch break class chair to make control rotate, to release the limiting of rotating assembly, so that backrest can be rotated relative to base, effectively improve operation convenience.

Description

Technical Field

[0001] This utility model relates to the field of school chairs, and in particular to a handle-type adjustment device and a lunch break school chair. Background Technology

[0002] To facilitate students' lunch break, the backrests of the school chairs are designed to be adjustable. Under normal use, the backrest is upright or slightly tilted to help students maintain good posture, and an adjustment mechanism locks the backrest in this position to prevent it from tilting backward. During lunch break, the adjustment mechanism is released, allowing the backrest to tilt backward at a greater angle, enabling students to recline and achieve a better rest. In existing technology, the unlocking component of the adjustment mechanism is located on the back of the chair, requiring the user to stand up to unlock it, which is inconvenient. Utility Model Content

[0003] This utility model provides a handle-type adjustment device and a lunch break chair, which improves the ease of operation.

[0004] On one hand, this utility model provides a handle-type adjustment device for adjusting the angle between the backrest and the base, including a fixing member, a rotating assembly, a control member, and a handle; the fixing member is used to install to the rear end of the base; the rotating assembly is used to install the backrest and is rotatably connected to the fixing member about the lateral direction; the control member is a strip-shaped component arranged along the longitudinal direction, and the middle position of the control member is rotatably connected to the fixing member about the lateral direction, and the control member is located on the front side of the rotating assembly; the handle is located at the front end of the control member;

[0005] When the rotating assembly rotates to the point where the backrest is in a sitting position, the rear end of the control component abuts against the rotating assembly to restrict the rotation of the rotating assembly.

[0006] When the handle moves upward, the control component rotates, and the rear end of the control component moves downward and separates from the rotating component to release the restriction on the rotating component. The rotating component and the backrest can then rotate backward to a reclining position.

[0007] The device comprises two fixing members arranged horizontally; a rotating assembly is disposed between the two fixing members; two control members are also present, each rotatably connected to one of the two fixing members; a linkage rod is fixed between the two control members to enable the two control members to rotate simultaneously; at least one control member is connected to the handle.

[0008] The rotating assembly includes a rotating tube and two positioning components. The rotating tube is rotatably connected between the two fixing components around its own axis, and the two positioning components are respectively fixed at the two transverse ends of the rotating tube. Each positioning component has an adjusting nut at its bottom, and the adjusting nut is threadedly connected to an adjusting bolt. The axis of the adjusting bolt is perpendicular to the rotation axis of the rotating assembly.

[0009] Each of the aforementioned fixing components is provided with a reclining limiting component; when the rotating assembly rotates to the reclining position of the backrest, the end of the adjusting bolt abuts against the reclining limiting component to infinitely adjust the reclining angle of the backrest.

[0010] The control component and the fixing component are both plate-shaped, arranged in parallel and perpendicular to the rotation axis between them; the front end of the control component is bent laterally away from the other control component and connected to the handle component.

[0011] The front half of the control component is inclined and bent downwards.

[0012] The handle is made of plastic, and the front end of the control component is inserted into the handle.

[0013] The upper part of the handle is a horizontally arranged plate with the word "pull" on its upper surface.

[0014] An elastic element is provided between the control component and the fixing component; when the handle component moves upward, the elastic element deforms to provide elastic force, causing the rear end of the control component to rotate upward.

[0015] On the other hand, this utility model provides a lunch break chair, including a base, a backrest and the aforementioned handle-type adjustment device, wherein the fixing member is connected to the base and the rotating component is connected to the backrest; a seat plate is provided on the top of the base and the handle is located below the seat plate.

[0016] The handle is located on the side of the base in the horizontal direction; or the handle is located on the front side of the base in the vertical direction.

[0017] The pull-type adjustment device and lunch break chair provided by this utility model have a handle that is located at the front end of the control component and is relatively close to the user. The user only needs to pull the handle upwards on the lunch break chair to make the control component rotate. After the rear end of the control component is rotated downwards, the restriction on the rotating component can be released, so that the rotating component and the backrest can rotate relative to the base, which effectively improves the ease of operation. Attached Figure Description

[0018] Figure 1A schematic diagram of the structure of the lunch break chair in a seated position, provided in a preferred embodiment of this utility model;

[0019] Figure 2 yes Figure 1 A structural diagram of the lunch break chair from another angle in a seated position;

[0020] Figure 3 yes Figure 2 The structural view of the lunch break chair in a reclining position;

[0021] Figure 4 yes Figure 2 A schematic diagram of the handle-type adjustment device on the lunch break desk;

[0022] Figure 5 yes Figure 4 Exploded view of the middle handle-type adjustment device. Detailed Implementation

[0023] 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.

[0024] In the diagram, units with similar structures are represented by the same labels.

[0025] Please see Figure 1 , Figure 2 and Figure 3 This utility model provides a lunch break chair, which includes a base 100, a backrest 200, and a handle-type adjustment device 300. A seat plate 101 is provided on the top of the base 100, and the handle-type adjustment device 300 is connected between the backrest 200 and the base 100 to adjust the angle between the backrest 200 and the base 100, so that the backrest 200 can switch between a sitting position and a reclining position.

[0026] The handle-type adjustment device 300 includes a fixing member 1, a rotating assembly 2, a control member 3, and a handle 4. The fixing member 1 is used to install to the rear end of the base 100. The rotating assembly 2 is used to connect to the backrest 200, and it is rotatably connected to the fixing member 1 about the horizontal direction X. The backrest 200 and the rotating assembly 2 can rotate together relative to the fixing member 1 and the base 100, thereby changing the reclining angle of the backrest 200. It can be understood that in this utility model, the horizontal direction X refers to the left-right direction under normal use, the vertical direction Y refers to the front-back direction under normal use, and the vertical direction Z refers to the height direction.

[0027] The control component 3 is a strip-shaped component arranged along the longitudinal direction Y. The middle position of the control component 3 in the longitudinal direction Y is rotatably connected to the fixing component 1 around the transverse direction X, and the control component 3 is located in front of the rotating assembly 2. The handle component 4 is located at the front end of the control component 3 and below the seat plate 101.

[0028] like Figure 2 As shown, when the rotating component 2 rotates to the backrest 200 in a sitting position, the rear end of the control component 3 abuts against the rotating component 2 to restrict the rotation of the rotating component 2.

[0029] like Figure 3 As shown, when the handle 4 moves upward, the handle 4 drives the control component 3 to rotate, causing the front end of the control component 3 to move upward and the rear end of the control component 3 to move downward and separate from the rotating component 2, so as to release the restriction on the rotating component 2, and the rotating component 2 and the backrest 200 can rotate backward to the reclining state.

[0030] Because the handle 4 is located at the front end of the control component 3, relatively close to the user, the user only needs to pull the handle 4 upwards while sitting on the lunch break chair to rotate the control component 3. Rotating the rear end of the control component 3 downwards releases the restriction on the rotating component 2, allowing the rotating component 2 and the backrest 200 to rotate relative to the base 100, effectively improving operational convenience. The handle 4 is located below the seat plate 101 and does not affect the user's ability to sit on the seat plate 101.

[0031] An elastic element 5 is provided between the control element 3 and the fixing element 1. When the handle 4 moves upward, the elastic element 5 deforms to provide an upward rotational elastic force to the rear end of the control element 3, facilitating the reset of the control element 3. The elastic element 5 can be a tension spring, with its two ends connected to the control element 3 and the fixing element 1 respectively. The elastic element 5 can also be a torsion spring, located at the pivot of the control element 3. As another embodiment, the elastic element 5 can be omitted, and the front end of the control element 3 can be moved downward by the weight of the handle 4 itself, thereby achieving the reset of the control element 3.

[0032] like Figure 4 and Figure 5 As shown, the front half of the control component 3 is inclined and bent downwards, so that the front end of the control component 3 and the handle component 4 are positioned low, and sufficient space is reserved between the handle component 4 and the seat plate 101 to facilitate lifting the handle component 4 upwards.

[0033] In this embodiment, there are two fixing members 1, arranged along the horizontal X direction. A rotating component 2 is positioned between the two fixing members 1. There are also two control members 3, each rotatably connected to one of the two fixing members 1. Using the two control members 3, the rotating component 2 can be limited from both sides of the horizontal X direction, ensuring the reliability of the limitation. The handle-type adjustment device 300 can be formed as a whole to facilitate assembly and connection with the base 100 and backrest 200. A linkage rod 6 is fixed between the two control members 3, allowing both control members 3 to rotate simultaneously.

[0034] In this embodiment, there are two handles 4, each mounted on one of the two control components 3. The two handles 4 are located on opposite sides of the horizontal axis of the base 100. Pulling either handle 4 unlocks the backrest 200, facilitating operation. Alternatively, in other embodiments, there may be only one handle 4, mounted on either control component 3. The handle 4 can be located on the left or right side of the chair. Pulling this handle 4 will cause both control components 3 to move simultaneously, meaning at least one control component 3 is connected to the handle 4. The handle 4 can be directly mounted on the front end of the control component 3, or it can be installed on the front end of the control component 3 using other components.

[0035] In this embodiment, as Figure 2 , Figure 3 As shown, the handle 4 is located on the side of the base 100 in the horizontal X direction, allowing the user to operate it from the side of the lunch break chair, making it convenient to use. Alternatively, the front end of the control member 3 can extend to the front of the base 100, so that the handle 4 is located on the front of the base 100 in the vertical Y direction, allowing the user to operate the handle 4 from the front of the base 100.

[0036] Both the control component 3 and the fixing component 1 are plate-shaped, arranged parallel to each other and perpendicular to the rotation axis between them to ensure the smoothness of their rotation. The front end of the control component 3 is bent in the direction away from the other control component 3 along the horizontal X direction and connected to the handle component 4 so that the handle component 4 is located on the horizontal X side of the base 100, making it convenient for the user to operate with their left or right hand.

[0037] The handle 4 is made of plastic, and the front end of the control component 3 is inserted into the handle 4 to ensure a secure and reliable connection. The upper part of the handle 4 is a horizontally positioned plate to increase its horizontal surface area, making it easier for the user to apply upward force. Figure 1 As shown, the upper surface of the handle 4 is marked with the word "pull," which prominently indicates the operating method to the user.

[0038] In this embodiment, as Figure 4 and Figure 5As shown, the rotating assembly 2 includes a rotating tube 21 and two positioning members 22. The rotating tube 21 is rotatably connected between two fixing members 1 around its own axis, and the two positioning members 22 are respectively fixed at the two transverse X ends of the rotating tube 21.

[0039] Each positioning component 22 has an adjusting nut 23 at its bottom, and the adjusting nut 23 is threadedly connected to an adjusting bolt 24. The axis of the adjusting bolt 24 is perpendicular to the rotation axis of the rotating assembly 2. Each fixing component 1 is provided with a reclining limiting component 11. When the rotating assembly 2 rotates to the reclining position of the backrest 200, the end of the adjusting bolt 24 abuts against the reclining limiting component 11 for stepless adjustment of the reclining angle of the backrest 200. The two adjusting bolts 24 respectively abut against the reclining limiting components 11 on the two fixing components 1 to ensure the stability of the backrest 200 in the reclining position.

[0040] By rotating the adjusting bolt 24, the distance between one end of the adjusting bolt 24 and the rotating component 2 can be changed. When one end of the adjusting bolt 24 abuts against the reclining limit member 11, the reclining angle of the backrest 200 can be changed. Users can rotate the adjusting bolt 24 as needed to adjust the tilt angle of the backrest 200 to a suitable state, thereby realizing stepless adjustment of the reclining angle of the backrest 200, which is convenient to use.

[0041] In this embodiment, the inclined limiting member 11 is plate-shaped and vertically fixed to the fixing member 1, with one side of its plate surface used to abut against the adjusting bolt 24. The inclined limiting member 11 has a large plate surface area, which can effectively ensure that the adjusting bolt 24 abuts against the inclined limiting member 11, ensuring the reliability of the abutment between the two.

[0042] The rotating tube 21 is provided with a insertion hole (not shown in the figure) for mounting the backrest 200. The bottom of the backrest 200 can be inserted into the insertion hole and then fastened with screws or other fasteners to further facilitate the installation between the backrest 200 and the adjustment mechanism. Of course, in other embodiments, the backrest 200 can also be mounted to the rotating tube 21 by other structures or fastening devices.

[0043] Each fixing component 1 is equipped with a sitting position stop pin 12, which is used to position the rotating component 2 and the backrest 200 in a sitting position. When the rotating component 2 rotates to the point where the backrest 200 is in a sitting position, the positioning component 22 is positioned between the rear end of the control component 3 and the sitting position stop pin 12 in the longitudinal Y direction, so that the backrest 200 cannot rotate back and forth, thus reliably positioning it in a sitting position, which is convenient for students to use in class and study.

[0044] The lunch break chair provided by this utility model allows the user to adjust the chair from a sitting position to a reclining position. While seated, the user simply lifts the handle 4, causing the front end of the control component 3 to rotate upwards. This releases the locking of the positioning component 22 on the rotating assembly 2, allowing the rotating assembly 2 and the backrest 200 to rotate. The user then flips the backrest 200 backwards until the adjusting bolt 24 contacts the reclining limit component 11 on the fixing component 1, thus shifting the chair to a reclining position suitable for lunch breaks. By rotating the adjusting bolt 24, the position of the adjusting bolt 24 on the positioning component 22 can be changed, allowing for stepless adjustment of the reclining angle of the chair backrest 200.

[0045] In the reclining position, the backrest 200 is rotated upwards to an upright or nearly upright position. The positioning component 22 and the rotating tube 21 rotate under the action of the backrest 200 until the positioning component 22 touches the sitting position stop pin 12. At the same time, the rear end of the control component 3 rotates upwards under the action of the elastic component 5 until the rear end of the control component 3 abuts against the front side of the positioning component 22. The backrest 200 is in a sitting position. The position of the positioning component 22 is locked by the sitting position stop pin 12 and the rear end of the control component 3, so that the rotating component 2 will not rotate, thereby locking the backrest 200 in a sitting position without shaking.

[0046] Since the handle 4 is located at the front end of the control component 3 and is relatively close to the user, the user only needs to pull the handle 4 upwards on the lunch break chair to make the control component 3 rotate. After the rear end of the control component 3 rotates downwards, the restriction on the rotating component 2 can be released, so that the rotating component 2 and the backrest 200 can rotate relative to the base 100, which effectively improves the ease of operation.

[0047] 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 handle-type adjustment device for adjusting the angle between the backrest and the base, characterized in that, It includes a fixing component, a rotating assembly, a control component, and a handle component; the fixing component is used to install to the rear end of the base; the rotating assembly is used to install the backrest, which is rotatably connected to the fixing component about a lateral direction; The control component is a strip-shaped component arranged longitudinally. The middle position of the control component is rotatably connected to the fixing component in the transverse direction. The control component is located on the front side of the rotating assembly. The handle component is located at the front end of the control component. When the rotating assembly rotates to the point where the backrest is in a sitting position, the rear end of the control component abuts against the rotating assembly to restrict the rotation of the rotating assembly. When the handle moves upward, the control component rotates, and the rear end of the control component moves downward and separates from the rotating component to release the restriction on the rotating component. The rotating component and the backrest can then rotate backward to a reclining position.

2. The handle-type adjustment device according to claim 1, characterized in that, There are two fixing members arranged horizontally; the rotating assembly is disposed between the two fixing members; there are also two control members, which are rotatably connected to the two fixing members respectively; a linkage rod is fixed between the two control members so that the two control members can rotate simultaneously; at least one control member is connected to the handle.

3. The handle-type adjustment device according to claim 2, characterized in that, The rotating assembly includes a rotating tube and two positioning components. The rotating tube is rotatably connected between the two fixing components around its own axis. The two positioning components are respectively fixed at the two transverse ends of the rotating tube. Each positioning component has an adjusting nut at its bottom, and the adjusting nut is threadedly connected to an adjusting bolt. The axis of the adjusting bolt is perpendicular to the rotation axis of the rotating assembly. Each of the aforementioned fixing components is provided with a reclining limiting component; when the rotating assembly rotates to the reclining position of the backrest, the end of the adjusting bolt abuts against the reclining limiting component to infinitely adjust the reclining angle of the backrest.

4. The handle-type adjustment device according to claim 2, characterized in that, Both the control component and the fixing component are plate-shaped, arranged in parallel, and perpendicular to the rotation axis between them; the front end of the control component is bent laterally away from the other control component and connected to the handle component.

5. The handle-type adjustment device according to any one of claims 1-4, characterized in that, The front half of the control component is inclined and bent downwards.

6. The handle-type adjustment device according to any one of claims 1-4, characterized in that, The handle is made of plastic, and the front end of the control component is inserted into the handle.

7. The handle-type adjustment device according to any one of claims 1-4, characterized in that, The upper part of the handle is a horizontally set plate with the word "pull" on its upper surface.

8. The handle-type adjustment device according to any one of claims 1-4, characterized in that, An elastic element is provided between the control element and the fixing element; when the handle moves upward, the elastic element deforms to provide elastic force so that the rear end of the control element rotates upward.

9. A type of afternoon nap chair, characterized in that, The device includes a base, a backrest, and a handle-type adjustment device as described in any one of claims 1-8, wherein the fixing member is connected to the base, and the rotating component is connected to the backrest; a seat plate is provided on the top of the base, and the handle is located below the seat plate.

10. The lunch break chair according to claim 9, characterized in that, The handle is located on the side of the base in the lateral direction; or, the handle is located on the front side of the base in the longitudinal direction.

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