Angle-adjustable chair

Abstract

The utility model relates to the technical field of furniture, in particular to an angle-adjustable chair which comprises chair legs, a seat surface, armrests, first connecting shafts and second connecting shafts, the seat surface is connected to the upper side surfaces of the chair legs, the armrests are rotatably connected to the left and right sides of the seat surface, the first connecting shafts are symmetrically connected to the chair legs, and the second connecting shafts are symmetrically connected to the chair legs. And second connecting shafts are rotationally connected to the first connecting shafts. According to the chair, the second connecting shaft is installed, the multiple clamping grooves are formed, after the fixing plate drives the first clamping block to be separated from the clamping grooves in the second connecting shaft, the chair back is rotated, the chair back drives the second connecting shaft to rotate, and due to the fact that the multiple clamping grooves are annularly formed in the second connecting shaft, the adjusting angle of the chair can be maximized; the angle adjustment limitation is small, so that the device can adjust the angle between the chair back and the seat surface according to the requirements of a user, the comfort and experience of the user are effectively improved, and the flexibility and the utilization rate of the device are also improved.

Description

Technical Field

[0001] This utility model relates to the field of furniture technology, and more specifically, to an adjustable chair. Background Technology

[0002] A chair is a common piece of furniture, primarily used to provide support for people when sitting. It typically consists of the following parts: 1. Seat: This is the part where a person sits directly; it is usually flat or slightly concave to provide comfortable support. 2. Backrest: Located behind the seat, it supports the person's back. Some chairs do not have a backrest and are called stools. 3. Armrests: Located on either side of the seat, they support the person's arms. Not all chairs have armrests. 4. Legs: These support the overall structure of the chair; they usually have four legs, but some chairs have three legs or other designs.

[0003] According to patent publication number CN107232825A, published on 2017-10-10, an adjustable-backchair includes a chair panel, a backrest, and support legs, with the chair panel supported on the support legs. Its features include: a backrest with a first support rod and second support rods on both sides of the backrest; four support legs; a first fixing rod between the support legs on one side of the first support rod; and a second fixing rod between the support legs on one side of the second support rod. The first and second support rods are hinged to each other; four support plates are provided at the top corners of the chair panel; the first and second support rods rotate around the first and second fixing rods, causing the chair backrest to rotate around the first and second fixing rods; when the first and second support rods move to the support plates at the top corners of the chair panel, the first and second support rods are blocked by the support plates. This invention improves the comfort of working and studying at a desk. This chair can adjust the angle between the backrest and the seat panel according to the user's needs, thereby improving user comfort. However, although the backrest angle adjustment function of this chair is effective, the following technical problems still exist: Limited adjustment range. In the existing design, the adjustment range of the backrest is limited by the support plate, which cannot achieve a wider range of tilt angle adjustment. This may not meet the needs of some users for a larger tilt angle in specific situations, such as when reading or resting for a long time; Insufficient adjustment precision. The adjustment of the backrest depends on the contact points between the first and second support rods and the support plate, which may result in low adjustment precision and the inability to achieve fine angle adjustment. In other application scenarios (such as home leisure, office meetings, etc.), it may not be flexible enough. The versatility and adaptability of the chair need to be further enhanced to meet the needs of more usage scenarios.

[0004] Therefore, it is necessary to design a chair whose angle can be freely adjusted. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, the present invention provides a chair with an adjustable angle.

[0006] Technical solution: An adjustable chair includes chair legs, a seat, armrests, a first connecting shaft, a second connecting shaft, a backrest, a mounting plate, a fixing plate, first locking blocks, and a first connecting spring. The seat is connected to the upper side of the chair legs, and armrests are rotatably connected to both sides of the seat. The first connecting shaft is symmetrically connected to the chair legs, and the second connecting shaft is rotatably connected to each of the first connecting shafts. Each second connecting shaft has multiple locking slots arranged in a ring. The backrest is connected to both second connecting shafts. The mounting plate is symmetrically connected to the chair legs, and the fixing plate is slidably connected to both mounting plates. The fixing plate has symmetrically connected first locking blocks, each of which engages with a nearby locking slot. The first connecting spring connects the fixing plate and the mounting plate.

[0007] In addition, it is particularly preferred that the seat also includes a second locking block, which is symmetrically and slidably connected to the seat surface, and the end of the second locking block away from the seat surface is inserted into the adjacent armrest.

[0008] In addition, it is particularly preferred that the armrests also include support frames, which are rotatably connected to each other.

[0009] Furthermore, it is particularly preferred that the armrest also includes a connecting block, a second limiting block, a second connecting spring, and a pull rope. Connecting blocks are symmetrically connected to each armrest, and a second limiting block is slidably connected to each connecting block. The second limiting block contacts the support frame, and a second connecting spring is connected between the second limiting block and the connecting block. A pull rope is connected between the second limiting blocks.

[0010] Furthermore, it is particularly preferred that the armrest also includes a first limiting block, with the upper part of each armrest symmetrically connected to a first limiting block.

[0011] In addition, it is particularly preferred that the chair also includes an elastic fabric, which is connected between the backrest and the seat.

[0012] This utility model has the following advantages:

[0013] This invention, by installing a second connecting shaft and having multiple slots, allows the fixing plate, along with the first locking block, to disengage from the slots on the second connecting shaft. Then, rotating the chair back causes the chair back to rotate along with the second connecting shaft. Because the second connecting shaft has multiple slots arranged in a ring, the adjustment angle of this device can be maximized with minimal limitations. This allows the device to adjust the angle between the chair back and the seat according to the user's needs, effectively improving user comfort and experience, and also enhancing the flexibility and utilization of the device. Attached Figure Description

[0014] Figure 1This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a three-dimensional structural diagram of the chair legs, seat, and armrests of this utility model.

[0016] Figure 3 This is a cross-sectional view of the second connecting shaft of this utility model.

[0017] Figure 4 This is a three-dimensional structural diagram of the support frame, the first limiting block, and the second guide block of this utility model.

[0018] Figure 5 This is a cross-sectional view of the second guide block of this utility model.

[0019] Figure 6 This is a cross-sectional view of the handrail of this utility model.

[0020] Figure 7 The extended state diagram of this utility model.

[0021] The above-mentioned figures include the following reference numerals: 1: chair leg, 2: seat, 3: armrest, 4: first connecting shaft, 5: second connecting shaft, 51: slot, 6: chair back, 7: mounting plate, 8: fixing plate, 81: first locking block, 9: first connecting spring, 10: support frame, 11: first limiting block, 12: connecting block, 13: second limiting block, 14: second connecting spring, 15: pull rope, 16: second locking block, 17: elastic cloth. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example: An adjustable chair, such as... Figures 1-3 and Figure 7As shown, the chair includes chair legs 1, seat 2, armrests 3, first connecting shaft 4, second connecting shaft 5, backrest 6, mounting plate 7, fixing plate 8, first locking block 81, and first connecting spring 9. The seat 2 is connected to the upper side of the chair legs 1. The armrests 3 are rotatably connected to the left and right sides of the seat 2 via pivots. The first connecting shafts 4 are symmetrically connected to the left and right sides of the chair legs 1. The second connecting shafts 5 are rotatably connected to the first connecting shafts 4. The second connecting shafts 5 are provided with multiple slots 51 arranged in a ring. The backrest 6 is connected to both second connecting shafts 5. The mounting plate 7 is symmetrically connected to the left and right sides of the chair legs 1. Two mounting plates 7 are connected to a fixed plate 8 by sliding up and down. The fixed plate 8 is symmetrically connected to a first locking block 81, which fits into the adjacent locking slot 51. The fixed plate 8 and the mounting plate 7 are connected by a first connecting spring 9 through a spring seat. The fixed plate 8 will take the first locking block 81 and disengage from the locking slot 51 on the second connecting shaft 5. At this time, when the chair back 6 is rotated, the chair back 6 will rotate together with the second connecting shaft 5 on the first connecting shaft 4. Since the second connecting shaft 5 has multiple locking slots 51 in a ring shape, the adjustment angle of this device can be maximized and the adjustment angle limitation is small.

[0024] like Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, it also includes a support frame 10 and a second locking block 16. The second locking block 16 is symmetrically and slidably connected to the seat surface 2. The end of the second locking block 16 away from the seat surface 2 is inserted into the adjacent armrest 3. The armrest 3 is rotatably connected to the support frame 10 for providing support for the armrest 3.

[0025] like Figure 2 , Figure 4 and Figure 5 As shown, it also includes a connecting block 12, a second limiting block 13, a second connecting spring 14, and a pull rope 15. Each handrail 3 is symmetrically connected with a connecting block 12, and each connecting block 12 is slidably connected with a second limiting block 13. The second limiting block 13 contacts the support frame 10. The second limiting block 13 and the connecting block 12 are connected by a second connecting spring 14 through a spring seat. The second limiting blocks 13 are connected with pull ropes 15.

[0026] like Figure 1 and Figure 4 As shown, it also includes a first limiting block 11 and an elastic cloth 17. The upper part of the armrest 3 is symmetrically connected with the first limiting block 11. An elastic cloth 17 is connected between the backrest 6 and the seat 2. The elastic cloth 17 will be stretched due to the rotation of the backrest 6. The elastic cloth 17 can provide support for the user's waist when the user lies on the backrest 6, effectively preventing the user's waist from being suspended for a long time and causing lower back muscle soreness.

[0027] When using this device, first move it to the location of use. To adjust the angle between the backrest 6 and the seat 2, first press down the fixing plate 8. The first connecting spring 9 is compressed, and the fixing plate 8, along with the first locking block 81, will disengage from the slot 51 on the second connecting shaft 5. At this time, rotate the backrest 6. The backrest 6 will rotate along with the second connecting shaft 5 on the first connecting shaft 4. Since the second connecting shaft 5 has multiple slots 51 arranged in a ring, the adjustment angle of this device can be maximized, and the adjustment angle limitation is small. During this process, the elastic cloth 17 will be stretched due to the rotation of the backrest 6, and the elastic cloth 17 can... When the user lies on the backrest 6, it provides support for the user's lower back, effectively preventing lower back muscle soreness caused by prolonged unsupported movement. When the backrest 6 is rotated to the user's desired angle, the rotation of the backrest 6 is stopped, and the fixing plate 8 is released. The first connecting spring 9 will move the fixing plate 8 upwards and reset it. At this time, the first locking block 81 will engage with the corresponding locking slot 51, thereby re-fixing the backrest 6. This allows the device to adjust the angle between the backrest 6 and the seat 2 according to the user's needs, and the adjustment angle is not limited, effectively improving the user's comfort and experience, as well as the flexibility and utilization of the device.

[0028] To expand the usable area of ​​this device, first pull the second locking block 16 to disengage it from the armrest 3. Then rotate the armrest 3 until it reaches its limit, at which point the upper side of the armrest 3 is flush with the upper side of the seat 2. Next, pull the pull rope 15, which will move the second limiting block 13 towards the center. At this point, the second connecting spring 14 will be compressed. When the second limiting block 13 disengages from the support frame 10, it indicates that the second limiting block 13 no longer limits the support frame 10. Rotate the support frame 10 and make it contact the first limiting block 11. When the support frame 10 is in contact with the ground, it is perpendicular to the ground, thus providing support for the extended armrest 3. After this is completed, the pull rope 15 is released, and the second connecting spring 14 will move the second limiting block 13 outward to reset and contact the side of the support frame 10 that is close to it. After this is completed, the second locking block 16 is re-inserted into the armrest 3, which completes the expansion of the usable area, so that the device can accommodate more users. This allows the device to not only adjust the angle between the backrest 6 and the seat 2, but also expand the usable area, effectively improving the utilization rate and practicality of the device.

[0029] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. All equivalent substitutions made within the principles of this utility model should be included within the protection scope of this utility model. Contents not described in detail in this utility model are existing technologies known to those skilled in the art.

Claims

1. An adjustable chair, comprising: Chair legs (1); The seat (2) is connected to the upper side of the chair leg (1); Armrests (3) are rotatably connected to the left and right sides of the seat (2); The first connecting shaft (4) is symmetrically connected to the chair leg (1); Its characteristics include: The second connecting shaft (5) is rotatably connected to the two first connecting shafts (4). The second connecting shaft (5) is provided with multiple slots (51), and the slots (51) are arranged in a ring. The chair back (6) is connected to the two second connecting shafts (5); Mounting plate (7) is symmetrically connected to the chair leg (1); The fixing plate (8) is slidably connected to the two mounting plates (7); The first card block (81) is symmetrically connected to the fixed plate (8), and the first card block (81) is fitted with the adjacent card slot (51); A first connecting spring (9) is connected between the fixed plate (8) and the mounting plate (7).

2. The adjustable chair as described in claim 1, characterized in that it further... include: The second locking block (16) is symmetrically slidably connected to the seat surface (2), and the end of the second locking block (16) away from the seat surface (2) is inserted into the nearby armrest (3).

3. The adjustable chair as described in claim 2, characterized in that it further... include: The support frame (10) is rotatably connected to the handrail (3).

4. The adjustable chair as described in claim 3, characterized in that it further... include: Connecting blocks (12) are symmetrically connected to the two handrails (3); The second limiting block (13) is slidably connected to the four connecting blocks (12) respectively, and the second limiting block (13) is in contact with the support frame (10); The second connecting spring (14) is connected between the second limiting block (13) and the connecting block (12); A pull rope (15) is connected between the second limiting blocks (13).

5. The adjustable chair as described in claim 4, characterized in that it further... include: The first limiting block (11) is symmetrically connected to the upper part of the handrail (3).

6. The adjustable chair as described in claim 5, characterized in that it further... include: Elastic fabric (17) is connected between the backrest (6) and the seat (2).

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