Adjustable seat

Abstract

The utility model relates to an adjustable seat in the field of seats, which comprises a base, a cushion, a backrest and armrests, side support plates are arranged at two ends of the base, the two side support plates and the base are combined to form a movable cavity, a fixed cross arm is arranged on the inner wall of the movable cavity, and the backrest is rotatably connected with one end of the fixed cross arm through a first rotating shaft. The end, away from the backrest, of the fixed cross arm is connected with a leg support, the leg support is rotatably connected with the cushion through a second rotating shaft, the face, away from the fixed cross arm, of the backrest is provided with a first connecting arm, the first connecting arm extends into the movable cavity, and the end, away from the fixed cross arm, of the leg support is rotatably connected with a second connecting arm; one end, far away from the leg support, of the second connecting arm is rotatably connected with one end, far away from the backrest, of the first connecting arm, the cushion is made of cloth and can be bent freely to adjust the shape, when the backrest inclines backwards, the leg support can be automatically lifted, the gravity center is kept in the base, the cushion can automatically adapt to curves of the back and the hip of a user after the user sits down, and the sitting comfort is improved.

Description

Technical Field

[0001] The utility model relates to the field of seats, in particular to an adjustable seat. Background Art

[0002] As a part of furniture or transportation means, the main function of a seat is to provide a place for people to sit down for activities such as rest, work or entertainment. There are various types of seats, such as household seats, office seats, transportation seats, outdoor seats, etc.

[0003] With the acceleration of the modern life rhythm, people's demands for the comfort and functionality of seats in different occasions are becoming increasingly diversified. Whether it is white-collar workers working long hours in the office, parents taking care of children at home, or temporary resters in public places, they all desire to have a seat that can be flexibly adjusted according to personal needs. For a seat with adjustable backrest inclination, the angle between the backrest and the seat surface is changed through an inclination adjustment lever or handle under the seat to adapt to different sitting postures. This adjustment usually relies on mechanical structures such as springs, linkages or gears.

[0004] For existing seats with adjustable backrests, when the backrest is adjusted backward, the overall center of gravity will move backward, resulting in the seat being prone to tipping backward. Moreover, the seat cushion and the backrest usually have a fixed shape. When people with different body shapes sit down, the curves of their backs and buttocks are different, and the fixed-shaped seat cushion and backrest cannot automatically adapt, and only users can adjust a relatively comfortable sitting posture by themselves. Summary of the Utility Model

[0005] In order to overcome the deficiencies of the prior art solutions, the utility model provides an adjustable seat, which can effectively solve the technical problems that the seat is prone to tipping backward after the backrest is adjusted backward and the seat cushion and the backrest usually have a fixed shape.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] An adjustable seat, comprising a base, a seat cushion, a backrest and armrests. The seat cushion is arranged in the base, and the backrest and armrests are both arranged around the seat cushion. Side support plates are provided at both ends of the base. The two side support plates and the base form a movable cavity. A fixed cross arm is arranged on the inner wall of the movable cavity. The backrest is rotatably connected to one end of the fixed cross arm through a first rotating shaft. A leg rest is connected to the end of the fixed cross arm away from the backrest. The leg rest is rotatably connected to the seat cushion through a second rotating shaft. A first connecting arm is arranged on the side of the backrest away from the fixed cross arm. The first connecting arm extends into the movable cavity. A second connecting arm is rotatably connected to the end of the leg rest away from the fixed cross arm. The end of the second connecting arm away from the leg rest is rotatably connected to the end of the first connecting arm away from the backrest. The first connecting arm, the fixed cross arm, the leg rest and the second connecting arm form a rectangle after combination. A counterweight block is arranged on the inner wall of the leg rest. Limit blocks are arranged on the opposite surfaces of the side support plates. One end of the seat cushion is connected to the backrest, and the other end is connected to the leg rest. The seat cushion is made of cloth and can be bent and adjusted in shape at will.

[0008] Further, a nylon support belt is arranged on the back of the seat cushion. The two ends of the nylon support belt are respectively connected to the end of the backrest away from the fixed cross arm and the second rotating shaft.

[0009] Further, the armrests are arranged at the ends of the side support plates away from the base, and the armrests extend towards the opposite surfaces of the two side support plates.

[0010] Further, a footrest is arranged at the end of the second connecting arm close to the leg rest, and the footrest extends to the outside of the footrest.

[0011] Further, a neck support is arranged on the seat cushion, and a head support is arranged at the top of the backrest. The neck support is close to the head support.

[0012] Further, the surfaces of the seat cushion, the armrests, the leg rest, the backrest and the side support plates are all covered with sponge cushions, and a protective cover is arranged on the surface of the sponge cushions.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: The first connecting arm, the fixed cross arm, the leg rest and the second connecting arm are provided and can rotate relative to each other. The backrest is connected to the first connecting arm. When the user sits on the seat cushion and leans backward, the backrest rotates backward relative to the base, and at the same time the first connecting arm rotates synchronously. The first connecting arm pushes the leg rest through the second connecting arm, so that the leg rest rotates upward with the second rotating shaft as the axis. When the backrest leans backward, the leg rest will automatically lift. A counterweight block is arranged on the inner wall of the leg rest to keep the center of gravity in the base. The seat cushion is made of cloth and can be bent and adjusted in shape at will. After sitting down, the seat cushion can automatically adapt to the curves of the user's back and buttocks, improving the comfort of sitting. Description of the Drawings

[0014] Figure 1 is a three-dimensional schematic diagram of the present utility model;

[0015] Figure 2 Schematic diagram of the connection of the first connecting arm, fixed cross arm, leg support and the second connecting arm 11 in the present utility model;

[0016] Figure 3 Schematic diagram of the seat cushion in the present utility model;

[0017] Figure 4 Schematic diagram of the backrest of the present utility model being turned backward;

[0018] Reference numerals in the figure: 1 - base, 2 - seat cushion, 201 - sponge soft cushion, 202 - nylon support belt, 3 - backrest, 4 - armrest, 5 - side support plate, 6 - movable cavity, 7 - leg support, 8 - first rotating shaft, 9 - second rotating shaft, 10 - first connecting arm, 11 - second connecting arm, 12 - fixed cross arm, 13 - limit block, 14 - counterweight, 15 - footrest. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0020] Next, in conjunction with Figures 1-4 A detailed description will be given of an adjustable seat of the present utility model:

[0021] An adjustable seat includes a base 1, a seat cushion 2, a backrest 3 and armrests 4. The seat cushion 2 is disposed in the base 1, and the backrest 3 and armrests 4 are both disposed around the seat cushion 2. Side support plates 5 are provided at both ends of the base 1. Sponge soft cushions 201 cover the surfaces of the seat cushion 2, armrests 4, leg supports 7, backrest 3 and side support plates 5. A protective cover is provided on the surface of the sponge soft cushion 201. The armrests 4 are disposed at one end of the side support plates 5 away from the base 1, and the armrests 4 extend towards the opposite sides of the two side support plates 5.

[0022] Two side support plates 5 and a base 1 are combined to form a movable cavity 6. The inner wall of the movable cavity 6 is provided with a fixed cross arm 12. The backrest 3 is rotatably connected to one end of the fixed cross arm 12 through a first rotating shaft 8. One end of the fixed cross arm 12 away from the backrest 3 is connected with a leg rest 7. The leg rest 7 is rotatably connected to the seat cushion 2 through a second rotating shaft 9. One side of the backrest 3 away from the fixed cross arm 12 is provided with a first connecting arm 10. The first connecting arm 10 extends into the movable cavity 6. One end of the leg rest 7 away from the fixed cross arm 12 is rotatably connected with a second connecting arm 11. One end of the second connecting arm 11 away from the leg rest 7 is rotatably connected with one end of the first connecting arm 10 away from the backrest 3. After the first connecting arm 10, the fixed cross arm 12, the leg rest 7 and the second connecting arm 11 are combined, a rectangle is formed. The inner wall of the leg rest 7 is provided with a counterweight 14. The opposite surfaces of the side support plates 5 are provided with limit blocks 13 to limit the angle at which the backrest 3 can be flipped.

[0023] One end of the seat cushion 2 is connected with the backrest 3, and the other end is connected with the leg rest 7. The seat cushion 2 is made of cloth and can be bent and adjusted at will. A nylon support belt 202 is arranged on the back of the seat cushion 2. The two ends of the nylon support belt 202 are respectively connected with one end of the backrest 3 away from the fixed cross arm 12 and the second rotating shaft 9. The nylon support belt 202 can strengthen the strength of the seat cushion 2 to prevent it from breaking, so that it can bear a greater weight.

[0024] One end of the second connecting arm 11 close to the leg rest 7 is provided with a footrest 15. The footrest 15 extends to the outside of the footrest 15 so that when the user sits on the chair, the sole of the foot has a place to place, avoiding the feet hanging in the air when sitting. A neck support is arranged on the seat cushion 2, and a head support is arranged at the top of the backrest 3. The neck support is close to the head support to improve the comfort when sitting.

[0025] An adjustable seat in this embodiment is provided with a first connecting arm 10, a fixed cross arm 12, a leg rest 7 and a second connecting arm 11, and they are rotatable with each other. The backrest 3 is connected with the first connecting arm 10. When the user sits on the seat cushion 2 and leans backward, the backrest 3 rotates backward relative to the base 1. At the same time, the first connecting arm 10 rotates synchronously. The first connecting arm 10 pushes the leg rest 7 through the second connecting arm 11, so that the leg rest 7 rotates upward with the second rotating shaft 9 as the axis. When the body leans backward, the leg rest 7 will automatically lift. A counterweight 14 is arranged on the inner wall of the leg rest 7 to keep the center of gravity in the base 1. The seat cushion 2 is made of cloth and can be bent and adjusted at will. After sitting down, the seat cushion 2 can automatically adapt to the curves of the user's back and buttocks, improving the comfort of sitting.

[0026] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claimed rights involved.

Claims

1. An adjustable chair, comprising a base, a seat cushion, a backrest and armrests, wherein the seat cushion is arranged in the base, and the backrest and the armrests are arranged around the seat cushion, characterized in that: The two ends of the base are provided with side support plates, and the two side support plates and the base are combined to form an active cavity. The inner wall of the active cavity is provided with a fixed cross arm, and the backrest is rotatably connected to one end of the fixed cross arm through a first rotating shaft, and the end of the fixed cross arm away from the backrest is connected to the leg support, and the leg support is rotatably connected to the seat cushion through a second rotating shaft, and a first connecting arm is provided on a side of the backrest away from the fixed cross arm, the first connecting arm extends into the active cavity, and the end of the leg support away from the fixed cross arm is rotatably connected to the second connecting arm, and the end of the second connecting arm away from the leg support is rotatably connected to the end of the first connecting arm away from the backrest. The first connecting arm, the fixed cross arm, the leg support and the second connecting arm are combined to form a rectangle, and a counterweight is provided on the inner wall of the leg support, and a limiting block is provided on the opposite surface of the side support plate, one end of the seat cushion is connected to the backrest, and the other end is connected to the leg support, and the seat cushion is made of cloth and can be bent and adjusted to its shape at will.

2. An adjustable seat according to claim 1, characterized in that: The back of the seat cushion is provided with a nylon support belt, and both ends of the nylon support belt are respectively connected to one end of the backrest away from the fixed cross arm and the second rotating shaft.

3. An adjustable seat according to claim 1, characterized in that: The armrest is arranged at one end of the side support plate away from the base, and the armrest extends toward opposite back sides of the two side support plates.

4. An adjustable chair according to any one of claims 1 to 3, characterized in that: A footrest is arranged at one end of the second connecting arm close to the leg support, and the footrest extends to the outside of the footrest.

5. An adjustable chair according to any one of claims 1 to 3, characterized in that: The seat cushion is provided with a neck support, and the top of the backrest is provided with a head support, and the neck support is close to the head support.

6. An adjustable chair according to any one of claims 1 to 3, characterized in that: The surfaces of the seat cushion, armrests, leg braces, backrest and side support plates are all covered with sponge cushions, and the surfaces of the sponge cushions are provided with protective covers.

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