Height-adjustable dining chair

Abstract

The utility model relates to the technical field of dining chairs, in particular to a height-adjustable dining chair which comprises a base, a height adjusting mechanism is mounted on the base, a seat plate is mounted on the height adjusting mechanism, handrails are mounted on two sides of the seat plate, a backup plate is mounted at one end of the seat plate through a rotating mechanism, and the other end of the seat plate is mounted on the rotating mechanism. The rotating mechanism comprises a rotating assembly and a drawing positioning assembly, the rotating assembly is used for conducting swing adjustment on the backup plate, the drawing positioning assembly is used for locking the angle position of the adjusted backup plate, the rotating assembly comprises a mounting cylinder mounted at one end of the seat plate, a rotating groove is formed in the top end of the mounting cylinder, and the rotating groove is matched with the rotating assembly. A damping rotating shaft is rotationally connected to the inner side of the rotating groove, and a connecting plate is mounted on the outer side of the damping rotating shaft; the chair is simple in structure and convenient to operate, a person can conveniently adjust the chair to a proper height and a proper leaning angle according to own requirements, and the practicability of the chair is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dining chairs, in particular to a dining chair with adjustable height. Background Art

[0002] Tables and chairs refer to chairs specially used for dining. They are a type of restaurant furniture. According to the material of the dining chair, they are divided into: solid wood chairs, steel-wood chairs, bentwood chairs, aluminum alloy chairs, metal chairs, chairs, plastic chairs, fiberglass chairs, acrylic chairs, board chairs, miscellaneous wood chairs, baby dining chairs and round chairs, etc. According to the purpose of the dining chair, they are divided into: Chinese dining chairs, Western dining chairs, coffee chairs, fast food chairs, bar chairs, office chairs, etc. The use of dining chairs is relatively common, but the existing dining chairs are difficult to disassemble and assemble quickly and conveniently, which makes it inconvenient to repair and replace the dining chair when it is partially damaged, and it is inconvenient to carry the dining chair, making it difficult to better ensure the use and transportation of the dining chair.

[0003] In order to solve the above technical problems, a Chinese patent with announcement number CN217906946U in the prior art discloses a height-adjustable dining chair, including a first support plate: one side of the first support plate is movably connected to the second support plate, and one side of the second support plate is movably connected to the third support plate, the back sides of the first support plate, the second support plate and the third support plate are movably connected to a connecting piece, and the side of the connecting piece away from the first support plate, the second support plate and the third support plate is fixedly connected to a backrest.

[0004] Although the above-mentioned prior art solution is convenient for repairing and replacing the dining chair when it is partially damaged, the angle of the backrest is fixed and cannot be adjusted according to the leaning angle required by the person, thereby lacking in practicality. Utility Model Content

[0005] The purpose of the utility model is to provide a dining chair with adjustable height to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A height-adjustable dining chair comprises a base, a height-adjusting mechanism is mounted on the base, a seat plate is mounted on the height-adjusting mechanism, armrests are mounted on both sides of the seat plate, a back plate is mounted on one end of the seat plate via a rotating mechanism, the rotating mechanism comprises a rotating assembly and a pull-out positioning assembly, the rotating assembly is used to swing and adjust the back plate, and the pull-out positioning assembly is used to lock the angle position of the back plate after adjustment.

[0008] As a preferred solution of the utility model, the rotating assembly includes a mounting tube installed on one end of the seat plate, a rotating groove is opened at the top of the mounting tube, a damping shaft is rotatably connected to the inner side of the rotating groove, a connecting plate is installed on the outer side of the damping shaft, the other end of the connecting plate is fixedly connected to one end of the support plate, the connecting plate and the rotating groove are slidably connected, and a movable rod is installed at one end of the damping shaft.

[0009] As a preferred solution of the utility model, the pull-out positioning assembly includes a mounting plate installed on one side of the mounting cylinder, the mounting plate is rotatably connected to the movable rod, a plurality of positioning holes are arranged on one side of the mounting plate, a positioning column is slidably connected to the inner side of the positioning hole, a movable sleeve is installed at one end of the positioning column, the movable rod extends to the outer side of the mounting plate and is slidably connected to the movable sleeve, sliding grooves are provided at both ends of the movable sleeve on the outer side of the movable rod, sliding blocks slidably connected to the sliding grooves are installed at both ends of the movable rod, a spring is installed between the sliding block and the inner wall of the sliding groove, and a handle is installed at one end of the movable sleeve.

[0010] As a preferred solution of the utility model, a magnetic block is embedded and installed at the bottom end of the positioning column, and an iron block adsorbed by the magnetic block is embedded and installed on the inner wall of the positioning hole.

[0011] As a preferred solution of the utility model, the height adjustment mechanism includes a fixed cylinder embedded and installed inside the base, a threaded rod extending to the inner side of the fixed cylinder is rotatably connected inside the base, an adjustment groove is opened inside the base on the outer side of the threaded rod, a first bevel gear is installed at one end of the threaded rod located inside the adjustment groove, a second bevel gear is meshedly connected to one side of the first bevel gear, a crank handle rotatably connected to the base is installed on one side of the second bevel gear, an extension cylinder is threadedly connected to the outer side of the threaded rod, and the top of the extension cylinder is fixedly connected to the bottom end of the seat plate.

[0012] As a preferred solution of the utility model, lifting grooves are provided at both ends of the inner side of the fixed tube, and lifting blocks slidably connected to the lifting grooves are installed at both ends of the extending tube.

[0013] As a preferred solution of the utility model, universal wheels are installed at the bottom corners of the base, the universal wheels are lockable universal wheels, and the grip of the handle is covered with a rubber anti-slip sleeve.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] In the utility model, a rotating component is used to swing and adjust the backrest, and a pull-out positioning component can lock the angle position of the backrest after adjustment. The structure is simple and the operation is convenient, which makes it easy for people to adjust the chair to a suitable height and leaning angle according to their own needs, thereby increasing the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a partial cross-sectional structural diagram of the fixed cylinder of the utility model;

[0018] Figure 3 It is a partial cross-sectional structural schematic diagram of the fixed disk and the movable sleeve of the utility model.

[0019] In the figure: 1. base; 2. seat plate; 3. armrest; 4. back plate; 5. mounting cylinder; 6. damping shaft; 7. connecting plate; 8. mounting plate; 9. positioning column; 10. movable sleeve; 11. sliding block; 12. handle; 13. fixed cylinder; 14. first bevel gear; 15. extension cylinder; 16. lifting block; 17. magnetic block; 18. universal wheel; 19. crank. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] Example:

[0022] See also Figure 1-Figure 3 , the utility model provides a technical solution:

[0023] A height-adjustable dining chair comprises a base 1, a height-adjusting mechanism is installed on the base 1, a seat plate 2 is installed on the height-adjusting mechanism, armrests 3 are installed on both sides of the seat plate 2, a backrest plate 4 is installed on one end of the seat plate 2 through a rotating mechanism, the rotating mechanism comprises a rotating component and a pull-out positioning component, the rotating component is used to swing-adjust the backrest plate 4, and the pull-out positioning component is used to lock the adjusted angular position of the backrest plate 4, when the chair is in use, the rotating component can be used to swing-adjust the backrest plate 4, and the pull-out positioning component can lock the adjusted angular position of the backrest plate 4, the structure is simple and the operation is convenient, so that people can adjust the chair to a suitable height and leaning angle according to their own needs, thereby increasing the practicality of the device.

[0024] In this embodiment, if Figure 1 , Figure 2 and Figure 3As shown, the rotating assembly includes a mounting tube 5 installed at one end of the seat plate 2, a rotating groove is opened at the top of the mounting tube 5, a damping shaft 6 is rotatably connected to the inner side of the rotating groove, a connecting plate 7 is installed on the outer side of the damping shaft 6, the other end of the connecting plate 7 is fixedly connected to one end of the supporting plate 4, the connecting plate 7 and the rotating groove are slidably connected, and a movable rod is installed at one end of the damping shaft 6. First, hold the handle 12 to drive the movable sleeve 10 to move, so that the sliding block 11 squeezes the spring on the inner side of the sliding groove, so that the positioning column 9 is separated from the inner side of the positioning hole, and then rotate the handle 12 to cooperate with the movable rod and the damping shaft 6 to drive the supporting plate 4 to rotate inside the rotating groove.

[0025] In this embodiment, if Figure 1 , Figure 2 and Figure 3 The movable sleeve 10 is installed at one end of the movable sleeve 10, and the movable sleeve 10 is installed at one end of the movable sleeve 10.

[0026] In this embodiment, if Figure 1 , Figure 2 and Figure 3 As shown, the height adjustment mechanism includes a fixed cylinder 13 embedded in the base 1, and a threaded rod extending to the inner side of the fixed cylinder 13 is rotatably connected inside the base 1. An adjusting groove is provided inside the base 1 on the outer side of the threaded rod, and a first bevel gear 14 is installed at one end of the threaded rod located inside the adjusting groove. A second bevel gear is meshedly connected to one side of the first bevel gear 14, and a crank 19 rotatably connected to the base 1 is installed on one side of the second bevel gear. An extension cylinder 15 is threadedly connected to the outer side of the threaded rod, and the top of the extension cylinder 15 is fixedly connected to the bottom end of the seat plate 2. Lifting grooves are provided at both ends of the inner side of the fixed cylinder 13, and lifting blocks 16 slidably connected to the lifting grooves are installed at both ends of the extension cylinder 15. Further, rotating the crank 19 can drive the second bevel gear to rotate, and then drive the first bevel gear 14 meshed with it to rotate, and the threaded rod also rotates accordingly, so that the extension cylinder 15 cooperates with the two sets of lifting blocks 16 and the lifting grooves to rise and fall inside the fixed cylinder 13, thereby achieving the effect of adjusting the height.

[0027] In this embodiment, if Figure 1 , Figure 2 and Figure 3 As shown, universal wheels 18 are installed at the bottom corners of the base 1. The universal wheels 18 are lockable universal wheels. The grip of the handle 12 is provided with a rubber anti-slip sleeve. Furthermore, holding the armrest 3 and cooperating with the universal wheels 18 at the bottom corners of the base 1 can drive the whole to move.

[0028] The implementation principle of an adjustable height dining chair in the embodiment of the present application is as follows: holding the handle 12 drives the movable sleeve 10 to move, so that the sliding block 11 squeezes the spring on the inner side of the sliding groove, so that the positioning column 9 is separated from the inner side of the positioning hole, and then the handle 12 is rotated to cooperate with the movable rod and the damping shaft 6 to drive the back plate 4 to rotate on the inner side of the rotating groove, and holding the handle 12 drives the movable sleeve 10 to move, so that the sliding block 11 squeezes the spring on the inner side of the sliding groove, so that the positioning column 9 is separated from the inner side of the positioning hole, and then the handle 12 is rotated to cooperate with the movable rod and the damping shaft 6 to drive the back plate 4 to rotate on the inner side of the rotating groove, and rotating the crank 19 can drive the second bevel gear to rotate, and then drive the first bevel gear 14 meshed with it to rotate, and the threaded rod also rotates accordingly, so that the extension cylinder 15 cooperates with the two sets of lifting blocks 16 and the lifting groove to rise and fall on the inner side of the fixed cylinder 13, so as to achieve the effect of adjusting the height, and holding the armrest 3 cooperates with the universal wheel 18 at the bottom corner of the base 1 to drive the whole to move.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A height-adjustable dining chair, comprising a base (1), characterized in that: The base (1) is provided with a height adjustment mechanism, a seat plate (2) is provided with the height adjustment mechanism, armrests (3) are provided on both sides of the seat plate (2), a backrest plate (4) is provided at one end of the seat plate (2) via a rotating mechanism, the rotating mechanism comprises a rotating assembly and a pull-out positioning assembly, the rotating assembly is used for swinging and adjusting the backrest plate (4), and the pull-out positioning assembly is used for locking the angle position of the backrest plate (4) after adjustment.

2. The height-adjustable dining chair according to claim 1, characterized in that: The rotating assembly comprises a mounting tube (5) mounted on one end of the seat plate (2), a rotating groove is formed at the top end of the mounting tube (5), a damping shaft (6) is rotatably connected to the inner side of the rotating groove, a connecting plate (7) is mounted on the outer side of the damping shaft (6), the other end of the connecting plate (7) is fixedly connected to one end of the support plate (4), the connecting plate (7) is slidably connected to the rotating groove, and a movable rod is mounted on one end of the damping shaft (6).

3. The height-adjustable dining chair according to claim 2, characterized in that: The pull-out positioning assembly comprises a mounting plate (8) mounted on one side of the mounting tube (5); the mounting plate (8) is rotatably connected to the movable rod; a plurality of positioning holes are arranged on one side of the mounting plate (8); a positioning column (9) is slidably connected to the inner side of the positioning hole; a movable sleeve (10) is mounted on one end of the positioning column (9); the end of the movable rod extending to the outer side of the mounting plate (8) is slidably connected to the movable sleeve (10); sliding grooves are arranged at both ends of the outer side of the movable rod; sliding blocks (11) slidably connected to the sliding grooves are mounted on both ends of the movable rod; a spring is mounted between the sliding block (11) and the inner wall of the sliding groove; a handle (12) is mounted on one end of the movable sleeve (10).

4. The height-adjustable dining chair according to claim 3, characterized in that: A magnetic block (17) is embedded and installed at the bottom end of the positioning column (9), and an iron block adsorbed by the magnetic block (17) is embedded and installed on the inner wall of the positioning hole.

5. The height-adjustable dining chair according to claim 4, characterized in that: The height adjustment mechanism comprises a fixed cylinder (13) embedded and installed inside the base (1); a threaded rod extending to the inside of the fixed cylinder (13) is rotatably connected inside the base (1); an adjustment groove is provided inside the base (1) on the outside of the threaded rod; a first bevel gear (14) is installed at one end of the threaded rod located inside the adjustment groove; a second bevel gear is meshingly connected to one side of the first bevel gear (14); a crank (19) rotatably connected to the base (1) is installed on one side of the second bevel gear; an extension cylinder (15) is threadedly connected to the outside of the threaded rod; the top end of the extension cylinder (15) is fixedly connected to the bottom end of the seat plate (2).

6. The height-adjustable dining chair according to claim 5, characterized in that: Both ends of the inner side of the fixed tube (13) are provided with lifting grooves, and both ends of the stretching tube (15) are provided with lifting blocks (16) slidably connected to the lifting grooves.

7. The height-adjustable dining chair according to claim 6, characterized in that: Universal wheels (18) are installed at the bottom corners of the base (1), and the universal wheels (18) are lockable universal wheels. The grip of the handle (12) is covered with a rubber anti-slip sleeve.

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