Angle-adjustable backrest seat

Abstract

The utility model discloses a backrest seat with an adjustable angle. The backrest seat comprises a seat backrest, a seat cushion and supporting frames, wherein the seat backrest and the seat cushion are connected based on a plug pin, and the supporting frames are arranged on the two sides of the seat cushion. The supporting frame is of an L-shaped frame structure, a matching rod is arranged at one end of the L-shaped frame, a matching groove is formed in the middle of the seat backrest, and the L-shaped frame is in sliding fit with the matching groove based on the matching rod; a mounting frame is arranged at the bottom of the seat cushion and is in sliding fit with the other end of the L-shaped frame. According to the backrest seat, the seat backrest and the seat cushion which are connected through the plug pin are arranged and matched with the supporting frame, the mounting frame below the seat cushion and other structures, so that angle adjustment of the seat backrest and the seat cushion is achieved, and the use reliability of the backrest seat and the structural stability of the backrest seat are improved.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, specifically to an adjustable backrest seat. Background Technology

[0002] Existing classroom chairs, besides meeting students' daily learning needs, also need to accommodate their lunch break. Adjustable backrests would allow the chairs to accommodate different sitting postures. Currently, adjustable backrest classroom chairs primarily use hinges to connect the backrest and seat cushion. An adjustment switch releases the lock, and the student adjusts the backrest's angle using their own pressure, then locks it back in place. This adjustment method lacks stability, requiring students to make multiple adjustments to achieve the desired posture, making the process cumbersome. Furthermore, during backrest rotation, the concentrated force at the hinge point between the backrest and seat cushion can easily damage this joint, affecting the chair's structural stability. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art. This utility model provides an adjustable backrest seat. Through the cooperation of the support frame and the mounting frame, the seat cushion can be extended outward to drive the seat back to rotate, thereby realizing the adjustment of the seat back angle, improving the convenience of adjusting the seat back angle, and improving the stability of the seat structure based on the support frame.

[0004] This utility model provides an adjustable angle backrest seat, the backrest seat includes: a seat back and a seat cushion connected by a pin, and support frames disposed on both sides of the seat cushion;

[0005] The support frame is an L-shaped frame structure, and one end of the L-shaped frame is provided with a mating rod. The middle position of the seat back is provided with a mating groove. The L-shaped frame is slidably engaged with the mating rod and the mating groove.

[0006] The bottom of the seat cushion is provided with a mounting bracket, which slides into contact with the other end of the L-shaped frame.

[0007] Furthermore, pulleys are provided on both sides of the mounting frame, and guide grooves for the pulleys to move are provided inside the support frame;

[0008] The mounting bracket is based on the sliding engagement between the pulley and the support frame.

[0009] Furthermore, a control panel and an adjustment switch are provided on one side of the mounting bracket. The adjustment switch is fixed to the outside of the support frame and has a locking groove that cooperates with the control panel.

[0010] Furthermore, the control board is provided with several mating holes, and the angle of the backrest seat is adjusted based on these mating holes.

[0011] Furthermore, the mounting bracket at the bottom of the seat cushion is provided with a foot pedal mechanism, and the mounting bracket has a receiving groove in the middle, and the foot pedal mechanism slides within the receiving groove.

[0012] Furthermore, the foot pedal mechanism includes a connecting rod and a foot pedal, one end of the connecting rod is inserted into the receiving groove, and the foot pedal is fixed to the other end of the connecting rod.

[0013] Furthermore, the backrest seat is provided with armrests symmetrically distributed on both sides of the support frame, and the armrests are rotatably mounted on the support frame.

[0014] Furthermore, the backrest seat is also equipped with a retractable and adjustable support base.

[0015] This utility model provides an adjustable backrest seat. By setting up a seat back and seat cushion connected by a pin, and with the help of a support frame and a mounting bracket under the seat cushion, the angle of the seat back and seat cushion can be adjusted, thereby improving the reliability and structural stability of the backrest seat. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the adjustable angle backrest seat structure in an embodiment of this utility model;

[0018] Figure 2 This is a schematic diagram of the adjustable-angle backrest seat in the unfolded state in an embodiment of this utility model;

[0019] Figure 3 This is a side view of the adjustable-angle backrest seat in the unfolded state in an embodiment of this utility model;

[0020] Figure 4 This is a schematic diagram of the bottom structure of the adjustable-angle backrest seat in an embodiment of this utility model;

[0021] Figure 5 This is an example of the embodiments of this utility model. Figure 4 An enlarged schematic diagram of the structure at point A. Detailed Implementation

[0022] 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.

[0023] refer to Figures 1 to 5 This utility model provides an adjustable-angle backrest seat, comprising: a seat back 2 and a seat cushion 1 connected by a pin; support frames 6 disposed on both sides of the seat cushion 1; the support frames 6 having an L-shaped structure, with a mating rod 61 at one end; a mating groove 21 at the middle of the seat back 2; and the L-shaped frame slidingly engaging with the mating rod 61 and the mating groove 21; and a mounting bracket 5 at the bottom of the seat cushion 1, which slidably engages with the other end of the L-shaped frame. By using the L-shaped support frame 6, the seat back 2 and the seat cushion 1 can be arranged in a linked structure based on the support frame 6. The structure of the support frame 6 improves the stability of the structural connection between the seat back 2 and the seat cushion 1 within the backrest seat, and supports the relative movement of the seat back 2 and the seat cushion 1, thereby improving the reliability of the backrest seat angle adjustment action.

[0024] Furthermore, the seat back 2 and the seat cushion 1 are connected by a pin, allowing the seat back 2 and the seat cushion 1 to rotate relative to each other, thereby satisfying the angle adjustment between the seat back 2 and the seat cushion 1.

[0025] Specifically, the mounting bracket 5 is provided with pulleys on both sides, and the support frame 6 is provided with a guide groove 62 for the pulleys to move. The mounting bracket 5 is slidably engaged with the support frame 6 based on the pulleys. The mounting bracket 5 is provided with two or more mounting rods, and pulleys are provided at both ends of any mounting rod. The mounting bracket 5 can be slidably engaged with the pulleys in the guide groove 62 of the support frame 6, so that the mounting bracket 5 can move horizontally along the guide groove 62 of the support frame 6, thereby driving the seat cushion 1 to move horizontally.

[0026] Furthermore, when the mounting bracket 5 moves the seat cushion 1 horizontally, the seat back 2 can deflect based on the movement of the seat cushion 1, so that the mating groove 21 of the seat back 2 and the mating rod 61 of the support bracket 6 can move and rotate relative to each other, thereby realizing the relative posture adjustment between the seat back 2 and the seat cushion 1 and meeting the angle adjustment requirements of the backrest seat.

[0027] Specifically, a control plate 51 and an adjustment switch 8 are provided on one side of the mounting bracket 5. The adjustment switch 8 is fixed to the outside of the support frame 6, and the adjustment switch 8 is provided with a locking groove that cooperates with the control plate 51. The adjustment switch 8 is provided with a button baffle and an elastic element. By pressing the button baffle, the locking groove of the adjustment switch 8 is opened, and the elastic element is squeezed. The control plate 51 can move within the locking groove. Based on the force applied by the student to the seat back 2 or the seat cushion 1, the seat cushion 1 can be easily moved horizontally, thereby adjusting the angle between the seat back 2 and the seat cushion 1.

[0028] Furthermore, after the adjustment is completed, the button cover is released. Based on the elastic reset of the elastic element, the locking groove of the adjustment switch 8 can be driven to lock the control plate 51, thereby locking and fixing the relative position between the seat back 2 and the seat cushion 1.

[0029] Specifically, the control board 51 is provided with a number of mating holes 511. The angle of the backrest seat is adjusted based on the number of mating holes 511. The control board 51 can limit the angle between the seat back 2 and the seat cushion 1 based on the number of mating holes 511, so that students can adjust to a preset angle position according to their actual use needs, thereby meeting the students' use needs.

[0030] Specifically, the mounting bracket 5 at the bottom of the seat cushion 1 is equipped with a foot pedal mechanism 7. The mounting bracket 5 has a receiving groove 52 in the middle, and the foot pedal mechanism 7 slides within the receiving groove 52. The foot pedal mechanism 7 is retractable at the bottom of the mounting bracket 5. During daily study and use by students, the foot pedal mechanism 7 can be stored at the bottom of the seat cushion 1 to avoid interfering with the daily use of the seat. When students use the seat to rest, the foot pedal mechanism 7 can be extended to allow students to stretch their legs and improve their comfort.

[0031] Furthermore, the foot pedal mechanism 7 includes a connecting rod 71 and a foot pedal 72. One end of the connecting rod 71 is inserted into the receiving groove 52, and the foot pedal 72 is fixed to the other end of the connecting rod 71. When the foot pedal 72 is extended, it can provide support for the student's legs and improve the reliability of the student's rest.

[0032] Specifically, the backrest seat is provided with armrests 3 symmetrically distributed on both sides of the support frame 6. The armrests 3 are rotatably mounted on the support frame 6, so that students can adjust the position of the armrests 3 according to their own needs, thereby improving the students' user experience of the backrest seat.

[0033] Specifically, the backrest seat is also equipped with a retractable and adjustable support base 4. The support base 4 is provided with two sets of parallel T-shaped steel profiles, which have good structural stability and support performance, and meet the positional adjustment requirements between the seat back 2 and the seat cushion 1.

[0034] Furthermore, the vertical section of any of the T-shaped steel profiles is configured as a telescopic structure, allowing students to adjust the overall height of the backrest seat to meet their usage needs.

[0035] This utility model embodiment provides an adjustable backrest seat. By setting up a seat backrest 2 and seat cushion 1 based on a pin connection, and with the help of a support frame 6, a mounting bracket 5 under the seat cushion 1 and other structures, the angle of the seat backrest 2 and seat cushion 1 can be adjusted, thereby improving the reliability of the backrest seat and the structural stability of the backrest seat.

[0036] Furthermore, the above description provides a detailed introduction to an adjustable backrest seat provided by the embodiments of this utility model. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An adjustable-angle backrest seat, characterized in that, The backrest seat includes: a seat back and a seat cushion connected by a pin, and support frames disposed on both sides of the seat cushion; The support frame is an L-shaped frame structure, and one end of the L-shaped frame is provided with a mating rod. The middle position of the seat back is provided with a mating groove. The L-shaped frame is slidably engaged with the mating rod and the mating groove. The bottom of the seat cushion is provided with a mounting bracket, which slides into contact with the other end of the L-shaped frame.

2. The adjustable-angle backrest seat according to claim 1, characterized in that, The mounting frame is provided with pulleys on both sides, and the support frame is provided with guide grooves for the pulleys to move. The mounting bracket is based on the sliding engagement between the pulley and the support frame.

3. The adjustable-angle backrest seat according to claim 2, characterized in that, A control panel and an adjustment switch are provided on one side of the mounting bracket. The adjustment switch is fixed to the outside of the support frame and has a locking groove that cooperates with the control panel.

4. The adjustable-angle backrest seat according to claim 3, characterized in that, The control panel is provided with several mating holes, and the angle of the backrest seat is adjusted based on these holes.

5. The adjustable-angle backrest seat according to claim 1, characterized in that, The mounting bracket at the bottom of the seat cushion is equipped with a foot pedal mechanism, and a receiving groove is provided in the middle of the mounting bracket, and the foot pedal mechanism slides in the receiving groove.

6. The adjustable-angle backrest seat according to claim 5, characterized in that, The foot pedal mechanism includes a connecting rod and a foot pedal. One end of the connecting rod is inserted into the receiving groove, and the foot pedal is fixed to the other end of the connecting rod.

7. The adjustable-angle backrest seat according to claim 1, characterized in that, The backrest seat is provided with armrests symmetrically distributed on both sides of the support frame, and the armrests are rotatably mounted on the support frame.

8. The adjustable-angle backrest seat according to claim 1, characterized in that, The backrest seat is also equipped with a retractable and adjustable support base.

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