Seat convenient to adjust height

Abstract

The utility model relates to the technical field of lifting chairs, and particularly discloses a chair convenient for height adjustment, when the chair needs to be lifted upwards, a rotating wheel is rotated, a transmission belt is driven by a gear below the rotating wheel to enable a threaded rod to rotate in a lifting barrel, and as the threaded rod is in threaded connection with the lifting barrel, the threaded rod rotates to jack up a seat plate; in the ascending process, the two helical tooth racks slide upwards, overcome the elastic force of the springs to contract inwards through inclined planes between the helical tooth racks and the helical tooth clamping blocks, and after sliding is stopped, the helical tooth clamping blocks pop up to clamp the helical tooth racks, so that the seat plate is kept at the height and cannot descend, and when the height needs to be decreased, a shifting rod is pulled, the shifting rod rotates to push an insertion block downwards, so that the seat plate is lifted. When the lifting chair is used, the oblique tooth clamping block overcomes the elastic force of the spring and contracts inwards along the oblique surface of the oblique tooth clamping block, the seat plate slides downwards under the action of gravity, the height is adjusted by rotating the wheel or pulling the shifting rod, and the effect of facilitating lifting is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting chairs, in particular to a chair that is convenient to adjust in height. Background Art

[0002] A chair is a kind of daily furniture, a kind of seat with a backrest and armrests. Modern chairs pursue beauty and fashion. Some chairs are no longer just seats. With the combination of technology, they make human life more convenient.

[0003] Existing Chinese patent: A chair, patent announcement number: CN201194663Y, comprising: a back frame, a seat body arranged on the back frame, and two legs connected to the seat body, the two legs are the two front legs of the chair; the back frame comprises a back plate, and two legs connected to the back plate, the two legs are the two rear legs of the chair. The back frame of the chair of the utility model is formed by the back plate and the two legs as the two rear legs of the chair, and the two legs as the two front legs of the chair are connected through the design of the seat body. The structure of the back frame, the seat body and the two legs is simple, easy to assemble and firmly connected, which can fully meet people's use needs.

[0004] However, during the implementation of the above technical solution, it was found that at least the following technical problems exist: the above-mentioned seat has no lifting structure, which makes its height unadjustable, and therefore it cannot be used by users of different heights, and its applicability is poor. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the utility model provides a chair that is easily height-adjustable, thereby resolving the technical problem that the above-mentioned chair has no lifting structure, resulting in its height being non-adjustable and thus being unable to be used by users of different heights and having poor applicability.

[0007] (II) Technical solution

[0008] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] A chair that is easy to adjust in height comprises a seat plate, a lifting rod is fixedly installed on the bottom end of the seat plate, a lifting bucket is slidably installed on the outer wall of the lifting rod, and a threaded rod is rotatably installed inside the lifting rod; the lifting bucket is threadedly connected to the threaded rod, a gear is installed on the top of the threaded rod, a backrest frame is fixedly installed on the side end of the seat plate, a backrest plate is slidably installed inside the backrest frame, and bolts are symmetrically installed with threads on both sides of the backrest plate; the backrest plate is a plate with high elasticity, a base is fixedly installed on the bottom end of the lifting bucket, two support arms are symmetrically installed on the top end of the base, two helical racks are symmetrically fixedly installed on both sides of the lifting rod, and a rotating wheel is rotatably installed on the bottom end of the seat plate; a gear is installed on the bottom end of the rotating wheel, a helical tooth block is slidably installed inside the support arm, a spring is fixedly installed on the side end of the helical tooth block, and a lever is rotatably installed on the bottom end of the seat plate.

[0010] Preferably, two inserting blocks are symmetrically rotatably mounted on the side end of the lever; the two inserting blocks are respectively located at the top ends of the two oblique tooth clamping blocks.

[0011] Preferably: a transmission belt is installed at the bottom end of the rotating wheel; the transmission belt is used to connect the rotating wheel and the gears of the threaded rod.

[0012] (III) Beneficial effects

[0013] 1. When it is necessary to lift upward, turn the wheel, and the gear under the wheel drives the transmission belt to rotate the threaded rod inside the lifting barrel. Since the threaded rod is threadedly connected to the lifting barrel, the rotation of the threaded rod will lift the seat plate upward. During the rising process, the two bevel racks slide upward, and through the inclined surface between the bevel rack and the bevel gear block, they overcome the elastic force of the spring and shrink inward. After stopping sliding, the bevel gear block pops out and jams the bevel gear rack, so that the seat plate maintains the height and does not drop. When it is necessary to lower the height, pull the lever, and the lever will push the plug block downward through rotation. The plug block will shrink inward along the inclined surface of the bevel gear block to overcome the elastic force of the spring, and the seat plate will slide downward under the action of gravity. The height adjustment is completed by rotating the wheel or pulling the lever, thereby achieving the effect of easy lifting.

[0014] 2. Loosen the bolts, press the backrest or pull the backrest to slide inside the backrest frame to change the curvature of the backrest so that the curvature of the backrest can fit the curve of your back, and then tighten the bolts to fix the backrest. By changing the curvature of the backrest and then fixing it with bolts, it can be adjusted at will according to the user's own situation, thereby achieving the effect of increasing the scope of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings.

[0016] Figure 1 This is a structural diagram of the backrest frame of the utility model;

[0017] Figure 2 This is a structural diagram of the transmission belt of the utility model;

[0018] Figure 3 This is a cross-sectional structural diagram of the support arm of the utility model;

[0019] Figure 4 It is a partial structural diagram of the helical rack of the utility model.

[0020] Legend: 1. Seat; 2. Lifting rod; 3. Bevel rack; 4. Lifting barrel; 5. Rotating wheel; 6. Transmission belt; 7. Support arm; 8. Backrest frame; 9. Backrest plate; 11. Bolt; 12. Push rod; 13. Insert block; 14. Bevel block; 15. Spring; 16. Threaded rod; 17. Base. DETAILED DESCRIPTION

[0021] The embodiment of the present application provides a seat that is easy to adjust in height, which effectively solves the technical problem that the above-mentioned seat has no lifting structure, resulting in that its height cannot be adjusted, and therefore it cannot be used by users of different heights and has poor applicability. When it is necessary to raise it upward, the rotating wheel is turned, and the gear under the rotating wheel drives the transmission belt to rotate the threaded rod inside the lifting barrel. Since the threaded rod is threadedly connected to the lifting barrel, the rotation of the threaded rod will push the seat plate upward. During the rising process, the two bevel racks slide upward, and through the inclined surface between the bevel rack and the bevel gear block, they overcome the elastic force of the spring and shrink inward. After the sliding stops, the bevel gear block pops out and clamps the bevel gear rack, so that the seat plate maintains its height and does not drop. When the height needs to be lowered, the lever is pulled, and the lever will push the plug downward by rotating, and the plug will be retracted inward along the inclined surface of the beveled tooth block to overcome the elastic force of the spring. The seat plate will slide downward under the action of gravity, and the height can be adjusted by rotating the wheel or pulling the lever, thereby achieving the effect of facilitating lifting and lowering. The bolts are loosened, and the backrest plate is pressed or pulled to slide inside the backrest frame to change the curvature of the backrest plate so that the curvature of the backrest plate can fit the curve of one's back, and then the bolts are tightened to fix the backrest plate. By changing the curvature of the backrest plate and fixing it with bolts, it can be adjusted at will according to the user's own situation, thereby achieving the effect of increasing the scope of use.

[0022] Example

[0023] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the technical solution in the embodiment of the present application effectively solves the technical problem that the existing chair has no lifting structure, the height cannot be adjusted, and it cannot be used by users of different heights. The overall idea is as follows:

[0024] In view of the problems existing in the prior art, the utility model provides a chair with convenient height adjustment, including a seat plate 1, a lifting rod 2 is fixedly installed on the bottom end of the seat plate 1, a lifting bucket 4 is slidably installed on the outer wall of the lifting rod 2, and a threaded rod 16 is rotatably installed inside the lifting rod 2; the lifting bucket 4 is threadedly connected to the threaded rod 16, and a gear is installed on the top of the threaded rod 16; a backrest frame 8 is fixedly installed on the side end of the seat plate 1, and a backrest plate 9 is slidably installed inside the backrest frame 8.

[0025] Bolts 11 are symmetrically installed with threads on both sides of the backrest plate 9; the backrest plate 9 is a plate with high elasticity, a base 17 is fixedly installed at the bottom end of the lifting barrel 4, two support arms 7 are symmetrically installed on the top of the base 17, two helical racks 3 are symmetrically fixedly installed on both sides of the lifting rod 2, a rotating wheel 5 is rotatably installed at the bottom end of the seat plate 1, and a gear is installed at the bottom end of the rotating wheel 5.

[0026] A helical tooth block 14 is slidably installed inside the support arm 7, and a spring 15 is fixedly installed on the side end of the helical tooth block 14. A shift rod 12 is rotatably installed on the bottom end of the seat plate 1, and two plug blocks 13 are symmetrically rotatably installed on the side end of the shift rod 12; the two plug blocks 13 are respectively located at the top ends of the two helical tooth blocks 14, and a transmission belt 6 is installed at the bottom end of the rotating wheel 5; the transmission belt 6 is used to connect the gears of the rotating wheel 5 and the threaded rod 16.

[0027] Working principle:

[0028] The first step, when it is necessary to rise upward, turn the rotating wheel 5, and the gear under the rotating wheel 5 drives the transmission belt 6 to make the threaded rod 16 rotate inside the lifting barrel 4. Since the threaded rod 16 is threadedly connected to the lifting barrel 4, the rotation of the threaded rod 16 will push the seat plate 1 upward. During the rising process, the two bevel racks 3 slide upward, and through the inclined surface between the bevel rack 3 and the bevel gear block 14, they overcome the elastic force of the spring 15 and shrink inward. After stopping sliding, the bevel gear block 14 pops out and blocks the bevel gear rack 3, so that the seat plate 1 maintains the height and does not drop. When it is necessary to lower the height, detent lever 12 is detent lever 12, which will push the plug block 13 downward through rotation, and the plug block 13 will shrink inward along the inclined surface of the bevel gear block 14 to overcome the elastic force of the spring 15. The seat plate 1 will slide downward under the action of gravity, and the height adjustment is completed by rotating the wheel 5 or detent lever 12, thereby achieving the effect of easy lifting.

[0029] The second step is to loosen the bolts 11 and press the backrest plate 9 or pull the backrest plate 9 to slide inside the backrest frame 8 to change the curvature of the backrest plate 9 so that the curvature of the backrest plate 9 can fit the curve of one's back, and then tighten the bolts 11 to fix the backrest plate 9. By changing the curvature of the backrest plate 9 and then fixing it with the bolts 11, it can be adjusted at will according to the user's own situation, thereby achieving the effect of increasing the scope of use.

[0030] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A chair that can be easily adjusted in height, comprising a seat plate (1), characterized in that: A lifting rod (2) is fixedly mounted on the bottom end of the seat plate (1), a lifting bucket (4) is slidably mounted on the outer wall of the lifting rod (2), and a threaded rod (16) is rotatably mounted inside the lifting rod (2); The lifting bucket (4) is threadedly connected to the threaded rod (16), and a gear is installed at the top end of the threaded rod (16).

2. A convenient height-adjustable chair as claimed in claim 1, characterized in that: A backrest frame (8) is fixedly mounted on the side end of the seat plate (1), a backrest plate (9) is slidably mounted inside the backrest frame (8), and bolts (11) are symmetrically threadedly mounted on both sides of the backrest plate (9); Wherein, the backrest plate (9) is a plate with high elasticity.

3. A convenient height-adjustable chair as claimed in claim 1, characterized in that: A base (17) is fixedly mounted on the bottom end of the lifting bucket (4), and two support arms (7) are symmetrically mounted on the top end of the base (17).

4. The convenient height-adjustable chair as claimed in claim 1, characterized in that: Two helical racks (3) are symmetrically and fixedly mounted on both sides of the lifting rod (2), and a rotating wheel (5) is rotatably mounted on the bottom end of the seat plate (1); Wherein, a gear is installed at the bottom end of the rotating wheel (5).

5. The convenient height-adjustable chair as claimed in claim 3, characterized in that: A helical tooth block (14) is slidably mounted inside the support arm (7), and a spring (15) is fixedly mounted on the side end of the helical tooth block (14).

6. The convenient height-adjustable chair as claimed in claim 1, characterized in that: A shifting rod (12) is rotatably mounted on the bottom end of the seat plate (1).

7. A convenient height-adjustable chair as claimed in claim 6, characterized in that: Two insert blocks (13) are symmetrically and rotatably mounted on the side ends of the lever (12); The two insert blocks (13) are respectively located at the top ends of the two oblique tooth clamping blocks (14).

8. The convenient height-adjustable chair as claimed in claim 4, characterized in that: A transmission belt (6) is installed at the bottom end of the rotating wheel (5); Wherein, the transmission belt (6) is used to connect the gears of the rotating wheel (5) and the threaded rod (16).

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