CN210227501U - A lifting device for the armrest of an office chair - Google Patents

Abstract

The utility model discloses a lifting device of an office chair armrest, which comprises an armrest frame, a telescopic sleeve and a pressing piece, the armrest frame is provided with a fixed seat fixed at the bottom of the chair seat and a hollow vertical tube, the upper half part of the outer side surface of the hollow vertical tube is provided with a strip-shaped positioning slot, the telescopic tube is sleeved on the hollow vertical tube of the armrest frame, the outer end surface is concavely provided with a containing groove, the two side walls of the containing groove are respectively provided with a pivot opening, the bottom end is provided with a through hole, the pressing piece is sleeved in the containing groove of the telescopic sleeve, the bottom end of the telescopic sleeve is concavely provided with a convex positioning block which can just extend into the through hole at the bottom end of the telescopic sleeve to be meshed with the positioning groove of the handrail frame, meanwhile, the inner edge of the upper end of the pressing piece is provided with an elastic piece, so that the elastic force of the pressing piece which is outwards propped in a normal state can adjust the height of the telescopic sleeve up and down after the upper end of the pressing piece is pressed by stress, thereby achieving the purpose of lifting the handrail. The utility model discloses only need according to pressing member collocation elastic component, easily make, equipment, use and maintain.

Description

Lifting device for office chair armrest

Technical Field

The utility model provides an office chair armrest technical field indicates especially that it provides a lifting device of office chair armrest technically.

Background

Some traditional office chairs are not provided with armrests, some office chairs are provided with armrests, most of the office chairs provided with the armrests are fixed-height armrests, but the fixed-height armrests can only be suitable for people with specific heights to use, so that people with different heights sometimes appear to be too high or too low when using the fixed armrests. Therefore, the height-adjustable armrest can be suitable for more people.

The conventional office chair has the disadvantages that the adjustable armrests are adjustable, but the adjustable armrests are complicated in structure, so that the manufacturing, the assembly and the maintenance are not easy, and the problems of parts and components of the conventional armrests are influenced by the complicated structure, the failure rate is increased, or the service life is shortened, so that the users of the adjustable armrests are not benefited.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a lifting device of office chair handrail according to the not enough of above-mentioned prior art, the simple and easy structure of pressing piece cooperation elastic component reaches its easy manufacturing, equipment, uses and maintains.

The technical scheme of the utility model as follows:

a lifting device for an armrest of an office chair, comprising:

the armrest frame is provided with a fixed seat fixed at the bottom of the chair seat and a hollow vertical pipe, the upper half part of one outer side surface of the hollow vertical pipe is provided with a strip-shaped positioning groove, and tooth sockets which are arranged oppositely are arranged at two sides of the positioning groove;

the telescopic sleeve is sleeved on the hollow vertical pipe of the armrest frame, the telescopic sleeve is concavely provided with an accommodating groove towards the outer end surface, the two side walls of the accommodating groove are respectively convexly provided with a pivot opening, and the bottom end of the accommodating groove is provided with a through hole; and

the pressing piece is a body opposite to the containing groove of the telescopic sleeve, the bottom end of the pressing piece is provided with a concave positioning block, the positioning block can just extend into the through hole at the bottom end of the containing groove of the telescopic sleeve to be meshed with the positioning groove of the handrail frame, two side edges of the positioning block are provided with pivot lugs corresponding to the pivot openings of the containing groove and just can be buckled into the pivot openings to form pivot swinging, the pivot lugs form a gradually tapered and inclined abutting surface upwards, when the pressing piece is buckled in the containing groove, an inclined gap can be formed for the pressing piece to swing, and meanwhile, a convex column is arranged in the abutting surface and sleeved with an elastic piece for the pressing piece to have elastic force of outward supporting in a normal state.

Further, a longitudinal groove is formed in one lateral side, facing outwards, of the hollow vertical pipe, and the positioning groove is located in the longitudinal groove.

Furthermore, the hollow vertical pipe is provided with at least two transverse grooves which can be matched with and sleeved with lantern rings which are generally opposite and slightly protrude out of the surface of the hollow vertical pipe.

Furthermore, the containing groove and the pressing piece are rectangular.

Further, the pivot opening is higher than a half position of the height of the containing groove.

Compared with the prior art, the utility model discloses following beneficial effect has: the armrest can be lifted, adjusted and positioned only by matching the pressing piece with the elastic piece, and the armrest is easy to manufacture, assemble, use and maintain.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a perspective exploded view of the present invention.

Fig. 3 is a schematic sectional view of the assembly of the present invention.

Fig. 4 is a schematic sectional view of the three-dimensional assembly of the present invention.

Fig. 5 is a schematic diagram of the combined cross-sectional operation of the present invention.

Fig. 6 is a schematic diagram of the three-dimensional sectional operation of the present invention.

Fig. 7 is a schematic view of the lifting operation of the present invention assembled to an office chair.

Reference numerals

10-handrail frame, 11-fixing base, 12-hollow vertical pipe, 121-positioning groove, 122-toothed groove, 123-longitudinal groove, 124-transverse groove, 13-lantern ring, 20-telescopic sleeve, 21-horizontal part, 22-containing groove, 221-pivot opening, 222-through hole, 30-pressing piece, 31-convex positioning block, 32-pivot lug, 33-abutting surface, 34-convex column, 35-elastic piece, 40-seat and 50-handrail pad.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 and 2, the present invention provides an embodiment of a lifting device for an armrest of an office chair.

The armrest frame 10, have fixed seat 11 and a hollow riser 12 fixed to bottom of the seat 40, the hollow riser has a long strip-like locating slot 121 on one side upper half outside, the locating slot 121 both sides have tooth sockets 122 arranged oppositely, the hollow riser 12 has longitudinal grooves 123 on one side outside, the locating slot 121 locates in the longitudinal groove 123, and the hollow riser 12 has at least two horizontal grooves 124, can cooperate and set up the lantern ring 13 that presents the relative form and slightly bulge on the surface of the hollow riser 12, form the antiskid efficacy with resistance with the inner wall edge of a telescopic tube 20;

a telescopic tube 20, which is sleeved on the hollow vertical tube 12 of the armrest frame 10, the top end of which is provided with a horizontal part 21 for sleeving the armrest pad 50 (as shown in the seventh figure), the outer end surface of the telescopic tube 20 is concavely provided with a rectangular accommodating groove 22, the positions of two side walls of the accommodating groove 22 slightly higher than a half are respectively convexly provided with a pivot opening 221, and the bottom end of the accommodating groove 22 is provided with a through hole 222; and

the pressing member 30, relative to the rectangular sheet body of the receiving slot 22 of the telescopic tube 20, has a convex positioning block 31 recessed from the bottom end thereof, the convex positioning block 31 can be inserted into the through hole 222 at the bottom end of the receiving slot of the telescopic tube 20 to engage with the positioning slot 121 of the armrest frame 10, and two side edges thereof are provided with pivot lugs 32 corresponding to the pivot openings 221 of the receiving slot 22, and can be just buckled into the pivot openings 221 to form a pivot swing, the pivot lugs 32 are formed into abutting surfaces 33 which are gradually inclined upwards, so that when the pressing member 30 is buckled in the receiving slot 22, an inclined gap can be formed for the pressing member 30 to swing, and meanwhile, a convex column 34 is arranged in the abutting surfaces 33 to be sleeved with an elastic member 35 for the pressing member 30 to normally have an elastic force of outward propping.

As shown in fig. 3 and 4, the sectional view of the assembly of the present invention shows that the pressing member 30 is accommodated in the accommodating slot 22 of the telescopic tube 20, and the pivot lug 32 and the pivot port 221 in the accommodating slot 22 form a pivot, and the convex positioning block 31 at the bottom end extends into the positioning slot 121 engaged with the armrest frame 10 through the through hole 222 at the bottom end of the accommodating slot 22, and because the pivot lug 32 of the pressing member 30 forms the inclined abutting surface 33, an inclined gap is formed between the pressing member 30 and the accommodating slot 22 for the pressing member 30 to swing up and down, and because the elastic member 35 in the abutting surface 33 abuts against, the convex positioning block 31 at the bottom end of the pressing member 30 can have an inward abutting elastic force to engage with the positioning slot 121 of the armrest frame 10, and when the upper end of the pressing member 30 is pressed by a force, the inclined abutting surface 33 and the pivot of the pressing member 30 are designed to make the positioning block 31 at the bottom end swing away from the limitation of the convex positioning slot 121, the telescopic tube 20 can be adjusted in height up and down (see fig. 5-7).

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims (5)

1. a lifting device for the armrest of an office chair, characterized in that: comprising: The armrest frame has a fixed seat fixed on the bottom of the seat and a hollow riser, the upper half of the side of the hollow riser is provided with a long positioning groove, and the two sides of the positioning groove have teeth arranged in an opposite shape groove; The telescopic sleeve is sleeved on the hollow standpipe of the handrail frame, the outer end surface of the telescopic sleeve is concavely provided with a accommodating groove, the two side walls of the accommodating groove are each protruding with pivot openings, and the bottom end of the accommodating groove is formed with through holes; and The pressing piece is a body corresponding to the accommodating groove of the telescopic sleeve, and a convex positioning block is concave in its bottom end, and the positioning block can just extend into the through hole at the bottom end of the accommodating groove of the telescopic sleeve and the positioning groove of the handrail frame The two sides of the two sides are provided with pivot ears corresponding to the pivot opening of the accommodating groove, which can just be buckled into the pivot opening to form a pivot point to swing, and the pivot ear is formed as an upwardly tapered and inclined contact surface, so that the When the pressing piece is buckled in the accommodating groove, a sloping gap can be formed for the pressing piece to swing, and at the same time, there is a protruding column sleeved with an elastic piece in the abutting surface, so that the pressing piece normally has an outward support. Elasticity. 2 . The lifting device for the armrest of an office chair according to claim 1 , wherein a longitudinal groove is provided on an outer side of the hollow riser, and the positioning groove is located in the longitudinal groove. 3 . 3 . The lifting device for the armrest of an office chair according to claim 1 , wherein the hollow riser is provided with at least two transverse grooves, which can be fitted with the approximately opposite collars that are slightly convex. 4 . Out of the hollow riser surface. 4 . The lifting device for the armrest of an office chair according to claim 1 , wherein the accommodating groove and the pressing member are rectangular. 5 . 5 . The lifting device for the armrest of an office chair according to claim 1 , wherein the pivot opening is higher than half of the height of the container. 6 .

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