CN220403533U - Chair convenient to adjust - Google Patents

Abstract

The utility model discloses a chair convenient to adjust. The device comprises a backrest and an adjusting box, wherein an internal thread sliding block in threaded connection with a screw rod is arranged on the backrest; an opening which is in sliding fit with the internal thread sliding block is formed in the adjusting box; the upper end of the adjusting box is rotationally connected with the screw rod, and the lower end of the screw rod is provided with a sliding plate with a rectangular through groove; the lower end of the adjusting box is provided with a polygonal through hole, and the polygonal through hole is internally matched with a matched rotating handle in a sliding way; the upper end of the rotating handle is fixedly connected with a shaft lever, two sliding rods are fixedly arranged on the shaft lever, and the upper ends of the two sliding rods are connected by a connecting rod; the connecting rod passes through the rectangular through groove and is in sliding fit with the rectangular through groove; the regulating box is internally provided with a lug which is rotationally connected with the shaft lever, the lower end of the lug is provided with a groove, and a magnet which is matched with the rotary handle in a magnetic attraction way is arranged in the groove. The chair realizes stepless adjustment of the backrest through the screw thread transmission on the screw rod, and has wide applicability; the up-and-down adjustment is completed by one action, the adjustment process is simple, and time and labor are saved; the rotary handle is fixed through magnetic attraction, so that the fixing performance is good.

Description

Chair convenient to adjust

Technical Field

The utility model relates to the technical field of furniture, and particularly discloses a chair convenient to adjust.

Background

Chairs are one of the pieces of furniture that are indispensable to our daily lives, and the comfort of chairs is one of the most interesting factors in our choice of chairs. Among them, the backrest adjustment principle of the chair is one of important factors affecting the comfort of the chair.

Searching the prior art, the utility model with publication number of CN219249641U discloses a backrest seat with adjustable chair. Including the back, this back seat passes through top connecting plate and movable connecting rod and connector and spacing lug's cooperation, can make back and movable connecting rod when upwards sliding along the spout, and spacing lug slides along the spacing groove to prevent that movable connecting rod from falling back, thereby fixed back's position, and movable block and connecting spring and mounting groove and movable groove's cooperation can make spacing lug and spacing groove separation, thereby make things convenient for back and movable connecting rod to slide downwards.

In the technical scheme, the whole backrest is required to be moved upwards when the backrest is adjusted upwards, and the movable block is required to be pulled when the backrest is adjusted downwards, so that the up-down adjustment is required to be completed by different actions, and the method is time-consuming, labor-consuming and complex in operation; the backrest is limited by the cooperation of the limiting convex blocks and the limiting sliding grooves, the requirements of each person cannot be met due to the step adjustment, and the applicability is poor; the movable block is exposed outside the fixed seat, and is limited by the spring, so that the limiting projection is easily separated from the limiting chute due to the influence of external force, and the safety coefficient and the fixing performance are poor.

Disclosure of Invention

The utility model aims to solve the problems in the background art and provides a chair convenient to adjust.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the chair convenient to adjust comprises a backrest and an adjusting box, wherein an internal thread sliding block is fixedly arranged on the rear surface of the backrest, and the internal thread sliding block is in threaded connection with a screw rod; an opening is formed in one side face of the adjusting box and is in sliding fit with the internal thread sliding block; the upper end of the adjusting box is rotationally connected with the screw rod, the lower end surface of the screw rod is fixedly provided with a sliding plate, and a rectangular through groove is formed in the sliding plate; the outer bottom surface of the lower end of the adjusting box is provided with a polygonal through hole, the polygonal through hole is slidably matched with a rotating handle, and the rotating handle is matched with the polygonal through hole; the lower bottom surface of the rotary handle is fixedly provided with a handle; the upper end face of the rotating handle is fixedly connected with a shaft lever, two sliding rods which are parallel to each other and are symmetrically arranged are fixedly arranged at the upper end of the shaft lever, and the upper ends of the two sliding rods are connected through a connecting rod; the connecting rod passes through the rectangular through groove and is in sliding fit with the rectangular through groove; the inner bottom surface of the lower end of the adjusting box is fixedly provided with a lug which is rotationally connected with the shaft lever, the lower end surface of the lug is provided with a groove, and a magnet is fixedly arranged in the groove; the magnet is preferably matched with the rotary handle in a magnetic attraction way, and the shaft rod and the screw rod are vertically arranged and coaxial.

Preferably, a second circular through hole is formed at the upper end of the groove, and the second circular through hole penetrates through the protruding block; the shaft rod penetrates through the second circular through hole and is rotationally connected with the second circular through hole.

Preferably, the rotating handle is made of magnetic materials, and the shaft rod and the handle are made of non-magnetic materials.

Preferably, the adjusting box is fixedly connected to the seat plate, and chair legs are arranged on the lower bottom surface of the seat plate.

Preferably, the adjusting box is vertically arranged; the upper side of the adjusting box is provided with a first circular through hole, and the upper end of the screw rod is rotationally connected with the first circular through hole.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, stepless adjustment of the backrest is realized by arranging the threaded connection of the screw rod and the internal thread sliding block, so that the requirements of different people can be met, and the adaptability is wide; the up-and-down adjustment of the backrest is completed through one action, the adjustment process is simple, and time and labor are saved; through the cooperation of rotatory handle and polygon through-hole, add magnet and rotatory handle's magnetism and inhale the cooperation, can carry out spacing to rotatory handle, can fix the handle again, the fixity is strong, is difficult for receiving the external force effect change the state after the adjustment.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic side cross-sectional view of the present utility model;

FIG. 3 is a schematic view of the rotary handle connection structure of the present utility model;

FIG. 4 is a schematic diagram of the connection of the shaft and the connecting rod of the present utility model;

in the figure: 1. a backrest; 2. an adjusting box; 3. a seat plate; 4. chair legs; 5. a screw rod; 6. an internal thread slider; 7. a shaft lever; 8. a magnet; 9. a handle; 10. a rotating handle; 11. a slide bar; 12. a connecting rod; 13. rectangular through grooves; 14. a groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, an embodiment of the present utility model is provided: a chair convenient to adjust comprises a backrest 1, wherein an internal thread sliding block 6 is fixedly arranged on the rear surface of the backrest 1, and the internal thread sliding block 6 drives the backrest 1 to move up and down. Right under the backrest 1 is a rectangular seat 3 which is horizontally placed, and four corners of the lower bottom surface of the seat 3 are fixed with chair legs 4 which are used for supporting the whole chair and bearing the weight of a human body. The rear surface fixed mounting of seat 3 is the regulating box 2 of vertical placing, and regulating box 2 is the rectangle box, and the opening is seted up to a side that regulating box 2 is close to back 1, opening and internal thread sliding block 6 sliding connection, and internal thread sliding block 6 only can follow the opening and slide from top to bottom, ensures not carrying out rotation or horizontal displacement.

A first vertical and downward circular through hole is formed in the center of the outer end face of the upper side of the adjusting box 2, and the screw rod 5 is rotationally connected to the first circular through hole. The upper end of the screw rod 5 passes through the first circular through hole and is arranged at the upper end of the adjusting box 2, so that the screw rod 5 can only rotate around the axis of the screw rod and cannot move up and down. The internal thread sliding block 6 is provided with a thread through hole, the thread through hole is in threaded connection with the screw rod 5, and the screw rod 5 and the thread of the thread through hole are matched to drive the backrest 1 to move up and down so as to adjust the backrest 1.

The center position of the lower extreme of regulating box 2 sets up vertical ascending hexagon through-hole, and sliding fit is the rotatory handle 10 of hexagon cylinder in the hexagon through-hole, and hexagon through-hole and rotatory handle 10 mutually match ensures that rotatory handle 10 can not rotate in the polygon through-hole because of external force. The lower end surface of the rotary handle 10 is fixedly provided with a handle 9 for pulling and pushing.

The central position of the inner end surface of the lower side of the adjusting box 2 is fixed with a convex block which is a polygonal column, and the lower surface of the polygonal column is provided with a groove 14. The upper surface of the groove 14 is fixedly provided with a magnet 8, and the magnet 8 is annular. The magnet 8 is in magnetic attraction fit with the rotating handle 10 made of magnetic materials, so that the rotating handle 10 is reset after adjustment, the rotating handle 10 can be firmly fixed, and meanwhile, the rotating handle 10 can be pulled out through the handle 9 during adjustment. A second circular through hole is formed in the center of the upper surface of the groove 14, the shaft rod 7 is connected in a cylindrical mode in a rotating mode through the second circular through hole, the shaft rod 7 is made of a non-magnetic material, and the magnet 8 is prevented from being in magnetic attraction fit with the shaft rod 7. The magnet 8 is sleeved on the outer surface of the shaft lever 7 and is rotationally connected with the shaft lever 7.

The lower end surface of the shaft lever 7 is fixedly connected to the upper surface of the rotary handle 10, and the shaft lever 7 and the rotary handle synchronously slide up and down and rotate. The upper end face of the shaft lever 7 is fixedly provided with two sliding rods 11 which are parallel to each other and are symmetrically arranged, and the upper ends of the sliding rods 11 are connected together through a connecting rod 12. A sliding plate is fixed at the lower end of the screw rod 5, and a rectangular through groove 13 is formed in the sliding plate. The rectangular through groove 13 is in sliding fit with the connecting rod 12, so that the connecting rod 12 can slide up and down along the rectangular through groove 13, and meanwhile, the connecting rod 12 can drive the screw rod 5 to rotate.

Working principle: when the backrest 1 needs to be adjusted, the handle 9 is pulled downwards, the handle 9 drives the rotary handle 10 to slide out downwards from the polygonal through hole, and the magnet 8 and the rotary handle 10 are demagnetized.

The rotating handle 10 moves downwards to drive the shaft lever 7 and the sliding rod 11 to move downwards, and the sliding rod 11 drives the connecting rod 12 to slide downwards along the rectangular through groove 13. In the process, the shaft lever 7, the rotary handle 10, the sliding rod 11 and the connecting rod 12 do not rotate, and meanwhile the rectangular through groove 13 limits the connecting rod 12. Thereafter, the rotary knob 10 is rotated, and the rotary knob 10 drives the shaft lever 7 to rotate. The shaft lever 7 drives the sliding rod 11 to rotate, and at the moment, the connecting rod 12 on the sliding rod 11 drives the rectangular through groove 13 to rotate, and the connecting rod 12 does not slide in the rectangular through groove 13. The rectangular through groove 13 rotates to drive rotation, and the screw rod 5 is in threaded connection with the internal thread sliding block 6, so that the internal thread sliding block 6 moves up and down along the opening of the adjusting box 2. The internal thread sliding block 6 moves up and down to drive the backrest 1 to move up and down, so that the backrest 1 is adjusted.

After the adjustment is finished, the pushing handle 9 drives the rotating handle 10 to slide into the polygonal through hole. When the rotary handle 10 is completely engaged with the polygon, and the magnet 8 magnetically attracts the rotary handle 10, the rotary handle 10 is fixed. In the process of upward sliding, the rectangular through groove 13 is in interactive fit with the connecting rod 12 and does not rotate.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (6)

1. Chair convenient to adjust, including back (1) and regulating box (2), its characterized in that: an internal thread sliding block (6) is fixedly arranged on the rear surface of the backrest (1), and the internal thread sliding block (6) is in threaded connection with the screw rod (5); an opening is formed in one side face of the adjusting box (2), and the opening is in sliding fit with the internal thread sliding block (6); the upper end of the adjusting box (2) is rotationally connected with a screw rod (5), a sliding plate is fixedly arranged on the lower end surface of the screw rod (5), and a rectangular through groove (13) is formed in the sliding plate; the outer bottom surface of the lower end of the adjusting box (2) is provided with a polygonal through hole, the polygonal through hole is slidably matched with a rotary handle (10), and the rotary handle (10) is matched with the polygonal through hole; the lower bottom surface of the rotary handle (10) is fixedly provided with a handle (9); the upper end face of the rotating handle (10) is fixedly connected with a shaft lever (7), two sliding rods (11) which are parallel to each other and are symmetrically arranged are fixedly arranged at the upper end of the shaft lever (7), and the upper ends of the two sliding rods (11) are connected through a connecting rod (12); the connecting rod (12) passes through the rectangular through groove (13) and is in sliding fit with the rectangular through groove (13); the inner bottom surface of the lower end of the adjusting box (2) is fixedly provided with a lug which is rotationally connected with the shaft lever (7), the lower end surface of the lug is provided with a groove (14), and a magnet (8) is fixedly arranged in the groove (14); the magnet (8) is in magnetic attraction fit with the rotary handle (10).

2. A chair for facilitating adjustment according to claim 1, wherein: the shaft rod (7) and the screw rod (5) are vertically arranged and coaxial.

3. A chair for facilitating adjustment according to claim 1, wherein: the upper end of the groove (14) is provided with a second circular through hole, and the second circular through hole penetrates through the convex block; the shaft rod (7) penetrates through the second circular through hole and is rotationally connected with the second circular through hole.

4. A chair for facilitating adjustment according to claim 1, wherein: the rotating handle (10) is made of magnetic materials, and the shaft rod (7) and the handle (9) are made of non-magnetic materials.

5. A chair for facilitating adjustment according to claim 1, wherein: the adjusting box (2) is fixedly connected to the seat plate (3), and chair legs (4) are arranged on the lower bottom surface of the seat plate (3).

6. A chair for facilitating adjustment according to claim 1, wherein: the adjusting box (2) is vertically arranged; the upper side of the adjusting box (2) is provided with a first circular through hole, and the upper end of the screw rod (5) is rotationally connected with the first circular through hole.