A dining chair with an adjustable backrest angle

Abstract

This utility model discloses an adjustable backrest angle dining chair, relating to the field of dining chair technology. It includes a reclining backrest, with an adjustment mechanism fixedly connected to the outer surface of the backrest. When the backrest is reclined, the rotation of a pivot and groove releases a certain length of pull rope, further driving the sliding pad forward. This effectively lowers the body's center of gravity. When the body reclines, the center of gravity shifts upwards and backwards. If the sliding pad does not move, the body is prone to losing balance. The forward movement of the sliding pad adjusts the center of gravity forward appropriately, allowing the body to maintain a stable posture while reclining, reducing the risk of slipping. When the backrest angle is adjusted to the normal position, the sliding pad returns to its corresponding position. The overall size of the dining chair does not increase, saving space like a regular dining chair and making it convenient for placement in a restaurant or home dining environment.

Description

Technical Field

[0001] This utility model relates to the field of dining chair technology, specifically to a dining chair with an adjustable backrest angle. Background Technology

[0002] Dining chair, a Chinese term, refers to a chair specifically designed for dining and is a type of restaurant furniture. Dining chairs can be categorized by material, such as solid wood chairs and steel-wood chairs; and by purpose, such as Chinese dining chairs, Western dining chairs, and coffee chairs.

[0003] Most dining chairs have fixed backrests that cannot be adjusted during use, resulting in a significant distance between the chair and the dining table. Furthermore, the chair cannot allow the user to recline comfortably after eating, leading to a poor dining experience. Therefore, this invention presents a dining chair with an adjustable backrest to address these issues. Utility Model Content

[0004] To address the shortcomings of existing technologies, the technical solution adopted by this utility model to solve its technical problems is: an adjustable backrest angle dining chair, including a reclining backrest, the outer surface of which is fixedly connected to an adjustment mechanism; the reclining backrest is the same as the backrest, and together with the adjustment mechanism, it achieves adaptive adjustment of the backrest angle.

[0005] The adjustment mechanism includes a motor, the output end of which is fixedly connected to a rotating shaft. A groove is formed on the outer surface of the rotating shaft, and a seat cushion is rotatably connected to the outer surface of the rotating shaft. A stabilizing component is slidably connected to the inner surface of the seat cushion, and an auxiliary component is installed on the inner surface of the seat cushion. The motor is installed inside the seat cushion, and the grooves are symmetrically formed on both sides of the outer surface of the rotating shaft.

[0006] Furthermore, the stabilizing component includes a pull cord, one end of which is fixedly connected to a sliding pad. The upper surface of the sliding pad has a groove, and a compression spring is installed on the side of the sliding pad near the groove. The pull cord is installed on the inner surface of the groove. Rotation of the shaft drives the groove to rotate, further releasing the pull cord. The released length of the pull cord is relatively small, within a few centimeters. The sliding pad can slide along the inner surface of the cushion. The groove limits the sliding path of the sliding pad. The compression spring initially has a pushing force on the sliding pad, but due to the pulling force of the pull cord, it cannot push the sliding pad to move. A portion of the pull cord passes through the inner surface of the cushion and can slide along it. The pull cords are also symmetrically arranged.

[0007] Furthermore, the inner surface of the backrest is fixedly connected to the outer surface of the rotating shaft, the motor is installed on the inner surface of the seat cushion, the end of the pull rope near the rotating shaft is installed on the inner surface of the groove, the end of the pull rope away from the groove is installed on the side of the sliding pad near the rotating shaft, the outer surfaces of the sliding pad and the sliding groove are both slidably connected to the inner surface of the seat cushion, and the end of the compression spring away from the sliding pad is fixedly connected to the inner surface of the seat cushion.

[0008] Furthermore, the auxiliary component includes a magnetic plate with symmetrically arranged protruding plates on both sides. A pressing block is positioned on the upper surface of each protruding plate, and a spring band is fixedly connected to the bottom of the pressing block. A pressure sensor is fixedly connected to the bottom of the spring band. The pressure sensor detects the applied pressure. The spring band functions similarly to a spring, possessing elasticity and a restoring function. The pressing block can slide downwards along the inner surface of the cushion, with the protruding plates limiting its sliding depth along the sliding path.

[0009] Furthermore, a fixed shaft is installed on the recessed inner wall at the center of the lower pressure block. A right-turning plate is rotatably connected to the outer surface of the fixed shaft. A rubber plate is fixedly connected to the lower surface of the right-turning plate, and a right magnetic block is fixedly connected to the bottom of the right-turning plate. A left-turning plate is fixedly connected to the side of the rubber plate away from the right-turning plate, and a left magnetic block is fixedly connected to the bottom of the left-turning plate. The rubber plate has elasticity and a restoring function; its presence allows the lower surfaces of the left and right-turning plates to tend to move away from each other in the initial state.

[0010] Furthermore, the magnetic plate is embedded in the inner surface of the cushion, the side of the convex plate away from the magnetic plate is fixedly connected to the inner surface of the cushion, the outer surface of the pressing block is slidably connected to the inner surface of the cushion, the pressure sensor is placed on the inner surface of the cushion, and the inner surface of the left-turning plate is rotatably connected to the outer surface of the fixed shaft. Since the magnetic plate is embedded in the inner surface of the cushion and symmetrically arranged on both sides of the fixed shaft, a magnetic plate is provided on one side of both the left and right turning plates. The magnetic plate on the left-turning plate can attract the left magnetic block, and the magnetic plate on the right-turning plate can attract the right magnetic block.

[0011] The beneficial effects of this utility model are as follows:

[0012] 1. In the process of leaning back, the present invention can release a certain length of pull rope by rotating the pivot and the groove, and further drive the sliding mat to move forward. This can effectively lower the body's center of gravity. When the body leans back, the center of gravity will move backward and upward. If the sliding mat does not move, the body is prone to losing balance. The forward movement of the sliding mat can adjust the center of gravity forward appropriately, so that the body can maintain a stable sitting posture in the leaning state and reduce the risk of the body slipping.

[0013] 2. When the backrest angle is adjusted to the normal position, the sliding pad will also return to the corresponding position. The overall size of the dining chair will not increase as a result, and it can still save space like an ordinary dining chair, making it convenient to place in a restaurant or family dining environment.

[0014] 3. In this invention, the user can adjust the backrest angle simply by squeezing the left and right rotating plates. Furthermore, the user can directly adjust the angle by touch while reclining, without needing to stand up or look at the screen, making operation more convenient and user-friendly. During adjustment, the user can adjust the pressure and angle according to their own feeling. Through the linkage of the pressure sensor and the motor, the backrest angle changes in real time, allowing the user to more accurately find a comfortable angle.

[0015] 4. In this utility model, after the user finds a suitable backrest angle, they only need to release the left and right rotating plates. The magnetic block and the magnetic plate can quickly fix the entire structure by adsorption. This method is simple and quick. The magnetic block and the magnetic plate have high stability and can ensure that the backrest angle will not slide accidentally due to external force during use. This can avoid accidents such as loss of balance or falling caused by sudden changes in the backrest angle when the user is leaning back. Attached Figure Description

[0016] Figure 1 This is the front view of this utility model;

[0017] Figure 2 This is a schematic diagram of the adjustment mechanism of this utility model;

[0018] Figure 3 This is a cross-sectional view of the seat cushion of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the auxiliary component of this utility model;

[0020] Figure 5 This is a cross-sectional view of the pressing block of this utility model;

[0021] Figure 6 This is a schematic diagram of the right-turn plate of this utility model.

[0022] In the diagram: 1. Reclining backrest; 2. Adjustment mechanism; 21. Motor; 22. Rotating shaft; 23. Groove; 24. Seat cushion; 25. Stabilizing component; 251. Pull cord; 252. Sliding pad; 253. Sliding groove; 254. Compression spring; 26. Auxiliary component; 261. Magnetic plate; 262. Protruding plate; 263. Lower pressure block; 264. Spring belt; 265. Pressure sensor; 266. Fixed shaft; 267. Right rotating plate; 268. Rubber plate; 269. Right magnetic block; 270. Left rotating plate; 271. Left magnetic block. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose.

[0024] Example 1:

[0025] Please see Figure 1 - Figure 3 This utility model provides a technical solution: an adjustable backrest angle dining chair, including a reclining backrest 1, and an adjustment mechanism 2 fixedly connected to the outer surface of the reclining backrest 1; the reclining backrest 1 is the backrest, and works with the adjustment mechanism 2 to achieve adaptive adjustment of the backrest angle, wherein the reclining backrest 1 is the backrest.

[0026] The adjustment mechanism 2 includes a motor 21, the output end of which is fixedly connected to a rotating shaft 22. A groove 23 is formed on the outer surface of the rotating shaft 22. A seat cushion 24 is rotatably connected to the outer surface of the rotating shaft 22. A stabilizing component 25 is slidably connected to the inner surface of the seat cushion 24. An auxiliary component 26 is installed on the inner surface of the seat cushion 24. The motor 21 is installed inside the seat cushion 24, and the grooves 23 are symmetrically formed on both sides of the outer surface of the rotating shaft 22.

[0027] The stabilizing component 25 includes a pull cord 251, one end of which is fixedly connected to a sliding pad 252. A groove 253 is formed on the upper surface of the sliding pad 252, and a compression spring 254 is installed on the side of the sliding pad 252 near the groove 23. The pull cord 251 is installed on the inner surface of the groove 23. Rotation of the pivot 22 drives the groove 23 to rotate, further releasing the pull cord 251. The released length of the pull cord 251 is relatively small, between a few centimeters. The sliding pad 252 can slide along the inner surface of the seat cushion 24. The groove 253 limits the sliding path of the sliding pad 252. The compression spring 254 initially has a pushing force to push the sliding pad 252, but due to the pulling force of the pull cord 251, it cannot push the sliding pad 252 to move. A portion of the pull cord 251 passes through the inner surface of the seat cushion 24 and can slide along it. The pull cords 251 are also symmetrically arranged and are of high quality, making them difficult to break.

[0028] The inner surface of the backrest 1 is fixedly connected to the outer surface of the rotating shaft 22. The motor 21 is installed on the inner surface of the seat cushion 24. One end of the pull rope 251 near the rotating shaft 22 is installed on the inner surface of the groove 23. The other end of the pull rope 251 away from the groove 23 is installed on the side of the sliding pad 252 near the rotating shaft 22. The outer surfaces of the sliding pad 252 and the sliding groove 253 are slidably connected to the inner surface of the seat cushion 24. The end of the compression spring 254 away from the sliding pad 252 is fixedly connected to the inner surface of the seat cushion 24.

[0029] When in use, diners can sit on the upper surface of the seat cushion 24. When the backrest 1 is in close contact with the back of the person and makes the person feel comfortable, the angle of the backrest 1 does not need to be adjusted. In the initial state, the backrest 1 is already at an angle perpendicular to the horizontal plane. Therefore, diners adjust the angle of the backrest outward to make it easier to lean back. When the motor 21 is started, it can drive the rotating shaft 22 and the backrest 1 to rotate, adjusting the backrest to a suitable angle so that diners can lean back.

[0030] When the backrest 1 and the pivot 22 rotate at an angle away from the seat cushion 24, the groove 23 on the surface of the pivot 22 will also rotate clockwise and release a certain length of pull rope 251. After the pull rope 251 is released, the pull rope 251 on the inner surface of the sliding pad 252 will be in a loose state. Therefore, under the compression of the compression spring 254, the sliding pad 252 will slide along the inner surface of the seat cushion 24 away from the pivot 22. That is, when the backrest 1 is reclined, the sliding pad 252 moves forward an appropriate distance under the pressure of the person's buttocks, which can better fit the buttocks and thighs of the human body. When the human body is reclining to rest, the center of gravity of the body will change. The forward movement of the sliding pad 252 can effectively prevent the buttocks from being unsupported, so that the weight of the body can be evenly distributed on the sliding pad 252, reducing local pressure, and making the user more comfortable when eating or resting.

[0031] Example 2:

[0032] Please see Figure 1 - Figure 6 This utility model provides a technical solution: Based on Embodiment 1, the auxiliary component 26 includes a magnetic plate 261, with convex plates 262 symmetrically arranged on both sides of the magnetic plate 261. A pressing block 263 is arranged on the upper surface of the convex plate 262, and a spring band 264 is fixedly connected to the bottom of the pressing block 263. A pressure sensor 265 is fixedly connected to the bottom of the spring band 264. The pressure sensor 265 can detect the pressure received. The spring band 264 has the same function as a spring, both having elasticity and reset functions. The pressing block 263 can slide downward along the inner surface of the cushion 24, and the sliding depth is limited by the convex plates 262 along the sliding path.

[0033] A fixed shaft 266 is installed on the recessed inner wall at the center of the lower pressure block 263. A right-turning plate 267 is rotatably connected to the outer surface of the fixed shaft 266. A rubber plate 268 is fixedly connected to the lower surface of the right-turning plate 267. A right magnetic block 269 is fixedly connected to the bottom of the right-turning plate 267. A left-turning plate 270 is fixedly connected to the side of the rubber plate 268 away from the right-turning plate 267. A left magnetic block 271 is fixedly connected to the bottom of the left-turning plate 270. The rubber plate 268 has elasticity and a reset function. Its presence allows the lower surfaces of the left-turning plate 270 and the right-turning plate 267 to tend to move away from each other in the initial state.

[0034] The magnetic plate 261 is embedded in the inner surface of the seat cushion 24. The side of the protruding plate 262 away from the magnetic plate 261 is fixedly connected to the inner surface of the seat cushion 24. The outer surface of the pressing block 263 is slidably connected to the inner surface of the seat cushion 24. The pressure sensor 265 is placed on the inner surface of the seat cushion 24. The inner surface of the left-turning plate 270 is rotatably connected to the outer surface of the fixed shaft 266. The magnetic plate 261 is embedded in the inner surface of the seat cushion 24, and the magnetic plates 261 are also symmetrically arranged on both sides of the fixed shaft 266. Therefore, the left-turning plate 270 and the right-turning plate 267 are both provided with a magnetic plate 261. The magnetic plate 261 on the left-turning plate 270 and the left magnetic block 271 can attract each other, and the magnetic plate 261 on the right-turning plate 267 and the right magnetic block 269 can attract each other.

[0035] When in use, when a diner sits on the upper surface of the sliding mat 252 and wants to adjust the angle of the backrest 1, they can press the outer surfaces of the left-turning plate 270 and the right-turning plate 267 by hand, causing the two plates to rotate around the outer surface of the fixed shaft 266 and promoting the upper surfaces of the two plates to move away from each other. During this process, the lower surfaces of the two plates will move closer together and press against the rubber plate 268 connecting them. As the lower surfaces of the left-turning plate 270 and the right-turning plate 267 move closer together, the left magnetic block 271 and the right magnetic block 269 will detach from the magnetic plate 261 on their respective adjacent sides. At this time, the diner can also press down on the left-turning plate 270 and the right-turning plate 267, and push the fixed shaft 266 and the pressing block 263 downwards. The pressure block 263 can move downwards along the inner surface of the sliding pad 252 and compress the spring band 264 at the bottom. After being pressed, the spring band 264 will continue to compress the pressure sensor 265, and the pressure sensor 265 will sense the pressure. The pressure sensor 265 will transmit the sensed pressure signal to the external controller, and the controller will continue to control the rotation angle of the output shaft of the motor 21. The deeper the pressing block 263 presses down along the inner surface of the sliding pad 252, the greater the pressure of the spring band 264 sensed by the pressure sensor 265, and the greater the rotation angle of the output shaft of the motor 21, that is, the greater the rotation angle of the reclining backrest 1. The diner can manually adjust the reclining angle of the reclining backrest 1, which can more easily meet the user's needs.

[0036] Once the user feels that the angle of the backrest 1 has been adjusted, the left and right rotating plates 270 and 267 can be released. The lower surfaces of the left and right rotating plates 270 and 267 rotate away from each other around the outer surface of the fixed shaft 266 under the elasticity of the rubber plate 268. This ultimately promotes the left magnetic block 271 on one side of the left rotating plate 270 to attract the magnetic plate 261 embedded in the sliding pad 252 together. At the same time, the right magnetic block 269 on one side of the right rotating plate 267 to attract the magnetic plate 261 embedded in the sliding pad 252 together. This can fix the entire left rotating plate 270, right rotating plate 267, fixed shaft 266, and lower pressure block 263. Furthermore, the squeezing force of the lower pressure block 263 on the spring band 264 is also further fixed. When the pressure sensor 265 senses that the pressure is constant, the motor 21 drives the rotating shaft 22 and the angle of the backrest 1 is fixed. The angle of the backrest 1 can be adjusted and fixed by the operator and can be stopped at any time.

[0037] Working principle:

[0038] During the process of leaning back, the rotation of the pivot 22 and the groove 23 can release a certain length of the pull rope 251 and further drive the sliding mat 252 to move forward. This can effectively lower the body's center of gravity. When the body leans back, the center of gravity will move backward and upward. If the sliding mat 252 does not move, the body is prone to losing balance. The forward movement of the sliding mat 252 can adjust the center of gravity forward appropriately, so that the body can maintain a stable sitting posture while leaning back, reduce the risk of slipping, and improve dining safety.

[0039] When the backrest angle 1 is adjusted to the normal position, the sliding pad 252 will also return to the corresponding position. The overall size of the dining chair will not increase as a result, and it can still save space like a regular dining chair, making it convenient to place in a restaurant or family dining environment.

[0040] Users can adjust the angle of the backrest 1 simply by squeezing the left-hand rotating plate 270 and the right-hand rotating plate 267. This adjustment can be made directly by touch while reclining, eliminating the need to stand up or look at the surface, making it more convenient and user-friendly. During adjustment, users can adjust the pressure and angle at any time according to their own feeling. Through the linkage of the pressure sensor 265 and the motor 21, the angle of the backrest 1 changes in real time, allowing users to more accurately find a comfortable angle.

[0041] Once the user finds a suitable reclining angle, simply release the left and right rotating plates 270 and 267. The magnetic blocks and magnetic plates 261 will quickly fix the entire structure in place. This method is simple and quick. The magnetic blocks and magnetic plates 261 have high stability and can ensure that the reclining angle will not slide accidentally due to external forces during use. This can prevent the user from losing balance or falling due to sudden changes in the reclining angle when leaning back.

[0042] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A dining chair with adjustable backrest angle, comprising a lying back (1), characterized in that: An adjustment mechanism (2) is fixedly connected to the outer surface of the backrest (1); The adjustment mechanism (2) includes a motor (21), the output end of which is fixedly connected to a rotating shaft (22). The outer surface of the rotating shaft (22) is provided with a groove (23). A seat cushion (24) is rotatably connected to the outer surface of the rotating shaft (22). A stabilizing component (25) is slidably connected to the inner surface of the seat cushion (24). An auxiliary component (26) is installed on the inner surface of the seat cushion (24).

2. A dining chair with an adjustable backrest angle according to claim 1, characterized in that: The stabilizing component (25) includes a pull rope (251), one end of which is fixedly connected to a sliding pad (252). A groove (253) is provided on the upper surface of the sliding pad (252), and a compression spring (254) is installed on the side of the sliding pad (252) near the groove (23).

3. A dining chair with an adjustable backrest angle according to claim 2, characterized in that: The inner surface of the backrest (1) is fixedly connected to the outer surface of the rotating shaft (22). The motor (21) is installed on the inner surface of the seat cushion (24). One end of the pull rope (251) near the rotating shaft (22) is installed on the inner surface of the groove (23). The other end of the pull rope (251) away from the groove (23) is installed on the side of the sliding pad (252) near the rotating shaft (22). The outer surfaces of the sliding pad (252) and the sliding groove (253) are slidably connected to the inner surface of the seat cushion (24). The end of the compression spring (254) away from the sliding pad (252) is fixedly connected to the inner surface of the seat cushion (24).

4. The dining chair with adjustable backrest angle according to claim 1, characterized in that: The auxiliary component (26) includes a magnetic plate (261), with convex plates (262) symmetrically arranged on both sides of the magnetic plate (261). A pressing block (263) is arranged on the upper surface of the convex plate (262), and a spring belt (264) is fixedly connected to the bottom of the pressing block (263). A pressure sensor (265) is fixedly connected to the bottom of the spring belt (264).

5. A dining chair with an adjustable backrest angle according to claim 4, characterized in that: A fixed shaft (266) is installed on the recessed inner wall at the center of the lower pressure block (263). A right rotating plate (267) is rotatably connected to the outer surface of the fixed shaft (266). A rubber plate (268) is fixedly connected to the lower surface of the right rotating plate (267). A right magnetic block (269) is fixedly connected to the bottom of the right rotating plate (267). A left rotating plate (270) is fixedly connected to the side of the rubber plate (268) away from the right rotating plate (267). A left magnetic block (271) is fixedly connected to the bottom of the left rotating plate (270).

6. The adjustable backrest angle dining chair according to claim 5, characterized in that: The magnetic plate (261) is embedded in the inner surface of the cushion (24), the side of the convex plate (262) away from the magnetic plate (261) is fixedly connected to the inner surface of the cushion (24), the outer surface of the lower pressure block (263) is slidably connected to the inner surface of the cushion (24), the pressure sensor (265) is placed on the inner surface of the cushion (24), and the inner surface of the left-turning plate (270) is rotatably connected to the outer surface of the fixed shaft (266).

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