CN219249643U

CN219249643U - Chair with liftable backrest

Info

Publication number: CN219249643U
Application number: CN202320041446.3U
Authority: CN
Inventors: 康正; 王志鹏; 杜敏雷; 李绍亮; 郝豪鹏; 徐新杰
Original assignee: Shandong Kangtai Industry Co Ltd
Current assignee: Shandong Kangtai Industry Co Ltd
Priority date: 2023-01-03
Filing date: 2023-01-03
Publication date: 2023-06-27
Anticipated expiration: 2033-01-03

Abstract

The utility model relates to a seat with a liftable backrest, which belongs to the technical field of seats and comprises a chassis, a seat and a backrest, wherein a linkage mechanism, a seat guide mechanism and a backrest guide mechanism are arranged on the chassis; the seat guide mechanism comprises two symmetrically arranged guide plates, and the seat is arranged on the guide plates; the linkage mechanism comprises a front connecting rod, an upper supporting rod and a linkage rod, wherein two ends of the front connecting rod are respectively movably arranged on the guide plate, the linkage rod is rotatably arranged on the upper supporting rod, and one end of the linkage rod is movably connected with the front connecting rod; the backrest guide mechanism comprises a sliding rail and a rear connecting rod, two ends of the rear connecting rod are slidably mounted on the sliding rail, the backrest is connected with the rear connecting rod, and the other end of the linkage rod is movably connected with the rear connecting rod. The utility model realizes the lifting of the backrest through a simple structure, and can be realized only by the gravity of a person, and the operation is very simple and convenient.

Description

Chair with liftable backrest

Technical Field

The utility model relates to a seat with a liftable backrest, and belongs to the technical field of seats.

Background

The traditional seat back seat is linked, the seat is leaned back forward, when the adjustment is needed, the button is pressed, the seat back is unlocked, the seat back angle adjustment is realized by applying external force or an automatic device, and the other is that the spring controls the seat back angle adjustment. The former is complex and high in cost, needs adjusting buttons, is inconvenient and long in time, and the latter is assisted by springs and has more severe weight requirements. Above-mentioned back chair linkage is the angle of adjusting the seat back, and still seat back seat linkage is that the seat support descends, the back rises, and the back descends, and the seat support rises, so people can back the seat back when using the seat, when not using, and the seat back is accomodate and is not taking too much space, but, the lift adjustment mechanism of the liftable seat of back is loaded down with trivial details, uses inconvenient operation, so needs a simple structure at present, convenient to use's seat that the back can go up and down.

Disclosure of Invention

The utility model provides a seat with a liftable backrest, which aims at the problems of complicated structure and inconvenient use and operation of the existing seat with the adjustable backrest.

The technical scheme for solving the technical problems is as follows:

the seat with the liftable backrest comprises a chassis, a seat and a backrest, wherein the chassis is provided with a seat guide mechanism and a backrest guide mechanism; the seat guide mechanism comprises a guide mechanism and a linkage mechanism, the seat guide mechanism comprises symmetrically arranged guide plates, the seat is arranged on the guide plates, and the guide plates provide guide for lifting of the seat; the linkage mechanism is arranged on the seat guide mechanism and comprises a front connecting rod, an upper supporting rod and a linkage rod, wherein two ends of the front connecting rod are respectively movably arranged on the guide plate, the upper supporting rod is fixedly arranged on the seat guide mechanism, the linkage rod is rotatably arranged on the upper supporting rod, and one end of the linkage rod is movably connected with the front connecting rod; the backrest guide mechanism comprises two sliding rails and two rear connecting rods, two ends of each rear connecting rod are respectively and slidably mounted on the two sliding rails, the backrest is connected with the rear connecting rods, and the other ends of the linkage rods are movably connected with the rear connecting rods.

On the basis of the technical scheme, the utility model can also make the following improvements for the technical scheme in order to achieve the convenience of use and the stability of equipment:

further, the seat guide mechanism further comprises a first guide rail and a second guide rail which are fixed on the chassis, the first guide rail is symmetrically provided with two guide rails, the second guide rail is symmetrically provided with two guide rails, the slide rail, the first guide rail and the second guide rail which are positioned on the same side are parallel, and the guide plate is slidably mounted on the first guide rail and the second guide rail on the same side.

By adopting the further technical scheme, the guide plates are moved more stably and smoothly by guiding the guide plates through the first guide rail and the second guide rail.

Further, the first guide rail is arranged between the sliding rail and the second guide rail, and two ends of the upper support rod are respectively and fixedly arranged on the upper parts of the two second guide rails.

Further, the two linkage rods are symmetrically arranged, the linkage rods are provided with mounting holes, front connecting holes and rear connecting holes, the upper support rods penetrate through the mounting holes, the front connecting rods penetrate through the front connecting holes, and the rear connecting rods penetrate through the rear connecting holes.

By adopting the further technical scheme, the linkage of the chair seat and the backrest is realized through the two linkage rods, so that the linkage process is more stable.

Further, the front connecting hole and the rear connecting hole are respectively arranged at two ends of the linkage rod, and the mounting hole is arranged at one end, close to the front connecting hole, of the middle point of the linkage rod.

By adopting the further technical scheme, the mounting hole is formed in one end close to the front connecting hole, the arm of force of the backrest is larger than that of the seat, the seat can realize larger displacement by only needing shorter displacement, and when a person sits on the seat, the backrest can be lifted faster.

Further, the link gear also comprises a lower support rod and a hydraulic cylinder, wherein two ends of the lower support rod are fixedly arranged at the lower part of the second guide rail, the hydraulic cylinder is arranged corresponding to the link rod, the end part of the hydraulic cylinder is arranged on the lower support rod, and the end part of a piston rod of the hydraulic cylinder is movably connected with the link rod.

By adopting the further technical scheme, when the backrest ascends, the piston rod of the hydraulic cylinder extends along with the linkage rod, and the piston rod of the hydraulic cylinder retracts to drive the linkage rod to move, so that the backrest can be reset.

Further, the hydraulic cylinder is a rebound hydraulic cylinder.

By adopting the further technical scheme, the piston rod of the hydraulic cylinder automatically retracts, so that the backrest is automatically reset.

Further, the backrest guide mechanism further comprises two connecting plates arranged at two ends of the rear connecting rod, one end of each connecting plate is fixedly connected with the backrest, and the other end of each connecting plate is in sliding connection with the sliding rail.

Further, a pulley I and a pulley II are arranged on the connecting plate, the pulley I is arranged in the sliding rail, and the pulley II is arranged on the outer side of the sliding rail.

By adopting the further technical scheme, the smooth movement of the connecting plate on the sliding rail is realized through the pulley I and the pulley II.

Further, a group of guide wheels are respectively arranged on the guide plate corresponding to the first guide rail and the second guide rail, and the two groups of guide wheels are respectively movably arranged in the first guide rail and the second guide rail.

The utility model has the advantages that: by arranging the seat guide mechanism and the backrest guide mechanism, the seat and the backrest are linked, when a person sits on the seat, the seat descends to drive the front connecting rod to move, the front connecting rod drives one end of the linkage rod to descend, the other end of the linkage rod ascends to drive the rear connecting rod to ascend, and the backrest is driven to ascend; when people leave the chair seat, the chair seat and the backrest are reset under the action of gravity, the backrest is lifted through a simple structure, and the operation is very simple and convenient only through the gravity of people.

Drawings

FIG. 1 is a schematic view of the overall structure of a seat according to the present utility model;

FIG. 2 is a schematic view of the internal structure of the seat of the present utility model;

fig. 3 is a schematic structural view of a backrest-raised state of the seat of the present utility model;

fig. 4 is a schematic view showing an internal structure of the seatback in the raised state of the seat of the present utility model.

The reference numerals are recorded as follows: 100. a chassis; 101. a universal wheel; 200. a seat; 201. a first guide rail; 202. a second guide rail; 203. a guide plate; 300. a backrest; 301. a slide rail; 302. a rear connecting rod; 303. a connecting plate; 304. a pulley I; 305. a second pulley; 401. a front link; 402. an upper support rod; 403. a linkage rod; 404. a lower support rod; 405. and a hydraulic cylinder.

Detailed Description

The principles and features of the present utility model are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.

As shown in fig. 1 to 4, the utility model provides a chair capable of lifting up and down, comprising a chassis 100, a seat 200 and a backrest 300, wherein the backrest 300 and the seat 200 are arranged on the chassis 100, the backrest 300 is arranged on one side of the seat 200, and a linkage mechanism, a seat guide mechanism and a backrest guide mechanism are arranged on the chassis 100.

The backrest guide mechanism comprises a sliding rail 301, a rear connecting rod 302 and two connecting plates 303 which are arranged at two ends of the rear connecting rod 302, the sliding rail 301 is fixedly arranged on the chassis 100, the sliding rail 301 is obliquely arranged, preferably is in an L shape, the sliding rail 301 is symmetrically provided with two connecting plates, two ends of the rear connecting rod 302 are respectively and slidably arranged on the sliding rail 301, one end of each connecting plate 303 is fixedly connected with the backrest 300 through screws, the other end of each connecting plate 303 is slidably connected with the sliding rail 301, a pulley I304 and a pulley II 305 are arranged on each connecting plate 303, the pulley I304 is arranged in the sliding rail 301, the pulley II 305 is arranged on the outer side of the sliding rail 301, two ends of the rear connecting rod 302 penetrate through the sliding rail 301 and are fixedly connected with the connecting plates 303, and the pulley I304 and the pulley II 305 are matched, so that the connecting plates 303 move up and down on the sliding rail 301 to drive the connecting rods and the backrest 300 to lift.

The seat guiding mechanism comprises a first guide rail 201, a second guide rail 202 and two symmetrically arranged guide plates 203, wherein one ends of the first guide rail 201 and the second guide rail 202 are fixed on the chassis 100, preferably on a part of the L-shaped slide rail 301 fixed on the chassis 100, the first guide rail 201 is symmetrically provided with two guide plates, and the second guide rail 202 is symmetrically provided with two guide plates; a part of the sliding rail 301, a first guide rail 201 and a second guide rail 202 on the same side are parallel, and the first guide rail 201 is arranged between the sliding rail 301 and the second guide rail 202; the guide plate 203 is slidably mounted on the first guide rail 201 and the second guide rail 202 on the same side, a group of guide wheels are respectively arranged on the guide plate 203 corresponding to the first guide rail 201 and the second guide rail 202, the two groups of guide wheels are respectively movably mounted in the first guide rail 201 and the second guide rail 202, the seat 200 is mounted on the guide plate 203, and the guide plate 203 can move up and down on the first guide rail 201 and the second guide rail 202, so that guiding is provided for lifting of the seat 200.

The linkage mechanism comprises a front connecting rod 401, an upper supporting rod 402 and a linkage rod 403; two ends of the front connecting rod 401 are respectively movably mounted on the guide plate 203, the guide plate 203 is provided with a connecting rod mounting hole, and two ends of the front connecting rod 401 are movably inserted into the connecting rod mounting hole; two ends of the upper support bar 402 are respectively and fixedly arranged at the upper parts of the two guide rails II 202; the linkage rod 403 is rotatably installed on the upper support rod 402, and one end of the linkage rod 403 is movably connected with the front connecting rod 401; the other end of the linkage rod 403 is movably connected with the rear connecting rod 302; the two linkage rods 403 are symmetrically arranged, the linkage rods 403 are provided with mounting holes, front connecting holes and rear connecting holes, the front connecting holes and the rear connecting holes are respectively arranged at two ends of the linkage rods 403, the upper supporting rods 402 penetrate through the mounting holes, the front connecting rods 401 penetrate through the front connecting holes, the rear connecting rods 302 penetrate through the rear connecting holes, the mounting holes are arranged at one end, close to the front connecting holes, of the middle point of the linkage rods 403, so that the moment arm of the chair seat 200 is shorter than that of the backrest 300, and the backrest 300 can be greatly displaced due to the fact that the shorter displacement of the chair seat 200 occurs.

The linkage mechanism further comprises a lower support rod 404 and a rebound type hydraulic cylinder 405, two ends of the lower support rod 404 are fixedly arranged at the lower part of the second guide rail 202, two hydraulic cylinders 405 are arranged corresponding to the linkage rods 403, the end parts of the hydraulic cylinders 405 are arranged on the lower support rod 404, the end parts of piston rods of the hydraulic cylinders 405 are movably connected with the linkage rods 403, and connecting points of the piston rods of the hydraulic cylinders 405 and the linkage rods 403 are arranged between the mounting holes and the rear connecting holes.

Four universal wheels 101 are symmetrically arranged at the bottom of the chassis 100 in pairs.

Working principle:

when a person sits down on the seat 200, the seat 200 and the guide plate 203 move downwards along the first guide rail 201 and the second guide rail 202 under the action of gravity, the front connecting rod 401 is driven to descend, the front connecting rod 401 drives the connecting rod 403 to rotate around the supporting rod 402, the front end (i.e. the end connected with the front connecting rod 401) of the connecting rod 403 descends, the rear end (i.e. the end connected with the rear connecting rod 302) ascends, the upper end of the rebound hydraulic cylinder 405 slowly stretches out along with the connecting rod 403, the rear connecting rod 302 drives the connecting plate 303 to ascend along the sliding rail 301 under the action of the connecting rod 403, the backrest 300 is driven to ascend, the automatic lifting of the seat backrest 300 is realized, and when the seat 200 contacts with the chassis 100, the backrest 300 reaches the highest point, the backrest 300 of the chair is adjusted.

When a person plays a role, as the chair seat 200 loses the gravity effect, no external force acts on the front connecting rod 401 and the linkage rod 403, the piston rod of the rebound hydraulic cylinder 405 automatically retracts to drive the upper supporting rod 402 of the linkage rod 403 to rotate as the center, the front end of the linkage rod 403 rises to drive the front connecting rod 401 to rise, and the front connecting rod 401 drives the guide plate 203 and the chair seat 200 to rise; the rear end of the linkage rod 403 descends to drive the rear connecting rod 302 to descend, the rear connecting rod 302 drives the connecting plate 303 and the backrest 300 to descend, the front connecting rod 401 is reset to the highest point, and the rear connecting rod 302 descends to the lowest point, namely the seat 200 and the backrest 300 are reset.

The chair adopts the rebound hydraulic cylinder, so that the descending of the chair seat and the ascending of the backrest are slow processes, and the experience is good; the structure is simple, time and labor are saved, the backrest can be adjusted only by sitting, and manual operation is not needed; when the chair is not used, the backrest is retracted, so that the space is saved.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.

Claims

1. The seat with the liftable backrest comprises a chassis, a seat and the backrest, and is characterized in that a linkage mechanism, a seat guide mechanism and a backrest guide mechanism are arranged on the chassis; the seat guide mechanism comprises two symmetrically arranged guide plates, the seat is arranged on the guide plates, and the guide plates provide guide for lifting of the seat; the linkage mechanism comprises a front connecting rod, an upper supporting rod and a linkage rod, wherein two ends of the front connecting rod are respectively movably installed on the guide plate, the upper supporting rod is fixedly arranged on the seat guide mechanism, the linkage rod is rotatably installed on the upper supporting rod, and one end of the linkage rod is movably connected with the front connecting rod; the backrest guide mechanism comprises two sliding rails and rear connecting rods, two ends of each rear connecting rod are respectively and slidably mounted on the sliding rails, the backrest is connected with each rear connecting rod, and the other end of each linkage rod is movably connected with each rear connecting rod.

2. The seat with the liftable backrest of claim 1, wherein the seat guiding mechanism further comprises a first guide rail and a second guide rail which are fixed on the chassis, the first guide rail is symmetrically provided with two, the second guide rail is symmetrically provided with two, the sliding rail, the first guide rail and the second guide rail which are positioned on the same side are parallel, and the guide plate is slidably arranged on the first guide rail and the second guide rail on the same side.

3. The seat with the liftable backrest according to claim 2, wherein the first guide rail is arranged between the slide rail and the second guide rail, and both ends of the upper support rod are respectively fixedly installed at the upper parts of the two second guide rails.

4. A seat with a liftable backrest according to claim 3, wherein the linkage bars are symmetrically provided with two, the linkage bars are provided with a mounting hole, a front connecting hole and a rear connecting hole, the upper support bar passes through the mounting hole, the front connecting rod passes through the front connecting hole, and the rear connecting rod passes through the rear connecting hole.

5. The seat with the liftable backrest of claim 4, wherein the front connecting hole and the rear connecting hole are respectively arranged at two ends of the linkage rod, and the mounting hole is arranged at one end, close to the front connecting hole, of the middle point of the linkage rod.

6. The seat with the liftable backrest according to claim 2, wherein the linkage mechanism further comprises a lower support rod and a hydraulic cylinder, two ends of the lower support rod are fixedly installed at the lower portion of the second guide rail, the hydraulic cylinder is arranged corresponding to the linkage rod, the end portion of the hydraulic cylinder is installed on the lower support rod, and the end portion of a piston rod of the hydraulic cylinder is movably connected with the linkage rod.

7. The seat of claim 6, wherein the hydraulic cylinder is a rebound hydraulic cylinder.

8. The seat with a liftable backrest according to claim 2, wherein the backrest guiding mechanism further comprises two connecting plates provided with two ends of the rear connecting rod, one end of each connecting plate is fixedly connected with the backrest, and the other end of each connecting plate is in sliding connection with the sliding rail.

9. The seat with the liftable backrest of claim 8, wherein the connecting plate is provided with a pulley I and a pulley II, the pulley I is arranged in the sliding rail, and the pulley II is arranged outside the sliding rail.

10. The seat with the liftable backrest according to claim 2, wherein a group of guide wheels are respectively arranged on the guide plate corresponding to the first guide rail and the second guide rail, and the two groups of guide wheels are respectively movably arranged in the first guide rail and the second guide rail.