Large-stroke back-chasing chair

Abstract

The utility model discloses a large-stroke back-chasing chair, which comprises a backrest assembly, a cushion assembly and a chair leg assembly, the backrest assembly is connected with a back-chasing mechanism, the back-chasing mechanism comprises a backrest supporting piece, a movable rod, a connecting positioning piece and a driving piece, the backrest assembly is connected with the backrest supporting piece, and the movable rod is connected with the connecting positioning piece. One end of the driving piece is movably connected with the connecting positioning piece, the other end of the driving piece acts on the backrest supporting piece, and the driving piece drives the backrest supporting piece to act and enables the backrest assembly to move front and back through linkage of the movable rod. The back-chasing chair is relatively simple to operate, large-stroke automatic back-chasing can be realized, and the use experience feeling is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, specifically to a long-travel backrest chair. Background Technology

[0002] As seating for children during their studies, study chairs play a vital role in their growth and learning. Among various types of children's study chairs, those with adjustable backrests are becoming increasingly popular due to their ease of use, as the backrest can be adjusted to meet the child's specific needs. Currently, adjusting the backrest of existing chairs on the market is relatively cumbersome, requiring a combination of fore-and-aft seat cushion adjustment and backrest adjustment to accommodate changes in maximum and minimum travel. Utility Model Content

[0003] To address the aforementioned technical problems, the purpose of this utility model is to provide a long-travel backrest-tracking chair. This backrest-tracking chair is relatively simple to operate and can achieve automatic backrest-tracking with a long travel distance, greatly improving the user experience.

[0004] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution:

[0005] A long-travel backrest chair includes a backrest assembly, a seat cushion assembly, and a chair leg assembly. A backrest-tracking mechanism is connected to the backrest assembly. The backrest-tracking mechanism includes a backrest support, a movable rod, a connecting positioning member, and a driving member. The backrest assembly is connected to the backrest support. One end of the driving member is movably connected to the connecting positioning member, and the other end acts on the backrest support. The driving member drives the backrest support to move, and through the movable rod, causes the backrest assembly to move back and forth.

[0006] Furthermore, the backrest assembly is rotatably connected to the backrest support, the backrest support is also rotatably connected to the connecting positioning member, and the driving member is rotatably connected to the backrest support.

[0007] Furthermore, one end of the movable rod is rotatably connected to the connecting positioning member, and the other end is rotatably connected to the backrest assembly.

[0008] Furthermore, the backrest assembly, movable rod, backrest support, and connecting positioning component cooperate to form a linkage mechanism with four fulcrums.

[0009] Furthermore, the drive component and the movable rod are both concealed within the backrest support component.

[0010] Furthermore, there are two movable rods, symmetrically arranged at the backrest assembly.

[0011] Furthermore, the connecting positioning member is fixed to the bottom of the seat cushion assembly.

[0012] Furthermore, the drive unit is connected to a drive line, and the drive line is also connected to a control unit, which can operate the drive unit through the drive line.

[0013] Furthermore, the control element is located at the front of the seat cushion assembly.

[0014] Furthermore, the driving component is a pneumatic driving component, an electric driving component, or a hydraulic driving component.

[0015] The beneficial effects of this utility model are:

[0016] In use, users only need to use the drive component and the linkage between the backrest support and the movable rod to move the backrest assembly in the forward and backward directions, so as to achieve the purpose of following the backrest as needed. The adjustment is relatively convenient, and a large stroke of following the backrest can be achieved without adjusting the seat cushion assembly.

[0017] This backrest chair is easy to operate, saves time and effort, is easy for users to operate on their own, has low production costs, is highly practical, and provides a good user experience. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the long-stroke backrest chair according to an embodiment of the present utility model.

[0019] Figure 2 This is a partial structural diagram of the long-stroke backrest chair according to an embodiment of the present utility model.

[0020] Figure 3 This is a partial structural schematic diagram of the chasing mechanism in an embodiment of this utility model.

[0021] In the diagram, 1: backrest assembly, 11: backrest body, 12: backrest connector; 2: seat cushion assembly; 3: chair leg assembly; 4: backrest support; 5: movable rod; 6: connecting and positioning component; 7: drive component; 8: control component. Detailed Implementation

[0022] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so that the advantages and features of this utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of this utility model.

[0023] As 1 to Figure 3 A preferred embodiment of a long-travel backrest chair is shown, which includes a backrest assembly 1, a seat cushion assembly 2, and a chair leg assembly 3. The chair leg assembly 3 is installed below the seat cushion assembly 2, and the backrest assembly 1 is installed above the seat cushion assembly 2.

[0024] The backrest assembly 1 is connected to a backrest tracking mechanism at its rear. The backrest tracking mechanism includes a backrest support 4, a movable rod 5, a connecting positioning component 6, and a driving component 7.

[0025] The connecting positioning component 6 is fixed to the bottom of the seat cushion assembly 2.

[0026] The backrest assembly 1 includes a backrest body 11 and a backrest connector 12 fixed to the rear side of the backrest body 11. The backrest connector 12 is rotatably connected to the upper part of the backrest support 4, and the lower part of the backrest support 4 is rotatably connected to the rear end of the connecting positioning member 6.

[0027] The driving component 7 can be selected from a pneumatic driving component, an electric driving component, or a hydraulic driving component; in this embodiment, the driving component 7 is a pneumatic driving component; one end of the driving component 7 is rotatably connected to the rear end of the connecting positioning component 6 through a pin, and the other end is rotatably connected to the backrest support component 4 through a pin.

[0028] One end of the movable rod 5 is rotatably connected to the connecting positioning member 6, and the rotatable connection point is coaxial with the rotatable connection point of the driving member and the connecting positioning member. The other end of the movable rod 5 is rotatably connected to the backrest connector 12 of the backrest assembly 1.

[0029] In this embodiment, the backrest support 4 has an inverted U-shaped structure; the drive component 7 and the movable rod 5 are both concealed within the backrest support 4. Furthermore, in this embodiment, there are two movable rods 5, symmetrically installed at the rear of the backrest assembly 1, i.e., located in the two arms of the inverted U-shaped backrest support 4. In other embodiments, the backrest support 4 may have other structures.

[0030] In this embodiment, the drive component 7 is connected to a drive line, and the drive line is also connected to a control component 8, which is located at the front of the seat cushion assembly 2. The control component 8 can operate the drive component 7 to close or open via the drive line.

[0031] The backrest assembly 1, movable rod 5, backrest support 4, and connecting positioning member 6 cooperate to form a linkage mechanism with four fulcrums, i.e., a quadrilateral linkage mechanism. The driving member 7 drives the backrest support 4 to move, and through the movable rod 5, causes the backrest assembly 1 to move back and forth, realizing backrest adjustment.

[0032] The working principle of the long-travel backrest chair in this embodiment is as follows:

[0033] In use, the user sits on the seat cushion assembly 2 and operates the control unit 8 at the front of the seat cushion assembly to activate the drive unit 7. Under air pressure, the drive unit 7 rotates, and its telescopic rod extends and retracts, driving the backrest support 4 to rotate around the fulcrum formed by its lower end and the connecting positioning unit 6. The movable rod 5 also rotates around the fulcrum formed by its lower end and the connecting positioning unit 6, and simultaneously limits the movement of the backrest assembly 1 and the backrest support 4, ensuring that the backrest assembly 1 can only move in the forward and backward direction. When further adjustment of the backrest assembly 1 is needed, the user can apply force with their back to activate the drive unit 7, backrest assembly 1, movable rod 5, and backrest support 4, achieving automatic adjustment of the backrest assembly. Once the adjustment is complete, operating the control unit 8 closes the drive unit 7, achieving the desired positioning.

[0034] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A long-travel backrest chair, comprising a backrest assembly, a seat cushion assembly, and a chair leg assembly, characterized in that: The backrest assembly is connected to a backrest tracking mechanism, which includes a backrest support, a movable rod, a connecting positioning component, and a driving component. The backrest assembly is connected to the backrest support. One end of the driving component is movably connected to the connecting positioning component, and the other end acts on the backrest support. The driving component drives the backrest support to move and, through the movable rod, causes the backrest assembly to move back and forth.

2. The long-travel backrest chair according to claim 1, characterized in that, The backrest assembly is rotatably connected to the backrest support, the backrest support is also rotatably connected to the connecting positioning member, and the driving member is rotatably connected to the backrest support.

3. A long-travel backrest chair according to claim 2, characterized in that, One end of the movable rod is rotatably connected to the connecting positioning component, and the other end is rotatably connected to the backrest assembly.

4. A long-travel backrest chair according to claim 3, characterized in that, The backrest assembly, movable rod, backrest support, and connecting positioning component work together to form a linkage mechanism with four fulcrums.

5. A long-travel backrest chair according to claim 1, characterized in that, The drive unit and the movable rod are both concealed within the backrest support.

6. A long-travel backrest chair according to claim 1, characterized in that, There are two movable rods, symmetrically arranged behind the backrest assembly.

7. A long-travel backrest chair according to claim 1, characterized in that, The connecting positioning component is fixed to the bottom of the seat cushion assembly.

8. A long-travel backrest chair according to claim 1, characterized in that, The drive unit is connected to a drive line, and the drive line is also connected to a control unit, which can operate the drive unit through the drive line.

9. A long-travel backrest chair according to claim 8, characterized in that, The control element is located at the front of the seat cushion assembly.

10. A long-travel backrest chair according to claim 1, characterized in that, The driving component is a pneumatic driving component, an electric driving component, or a hydraulic driving component.

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