Adaptive lifting armrest

Abstract

The present invention proposes an adaptive lifting armrest, comprising an armrest body and an armrest tube assembly, wherein the armrest body is installed on the top of the armrest tube assembly; the armrest tube assembly comprises an armrest outer tube and an armrest inner tube, wherein the armrest outer tube is sleeved on the armrest inner tube and can move up and down along the armrest inner tube; an elastic reset element is provided between the armrest outer tube and the armrest inner tube, wherein the elastic reset element enables the armrest outer tube to always have a tendency to pop up; the armrest body is installed on the upper end of the armrest outer tube. The armrest of the present invention is lifted and lowered by the nested and movable cooperation of the armrest outer tube and the armrest inner tube, and the force of the elastic reset element is used to balance the weight applied by the user, thereby realizing stepless adaptive lifting and lowering adjustment, so that the user's hands can enjoy a comfortable supporting state.

Description

Technical Field

[0001] The invention belongs to the field of office chair accessories, and in particular relates to an adaptive lifting armrest. Background Art

[0002] The armrests are installed on both sides of the seat for people to rest their hands. The armrests increase the comfort of the seat. However, most of the existing armrests are fixed in height and cannot be adjusted, which cannot meet the needs of consumers of different body shapes. A small number of adjustable armrests are adjusted in height step by step by setting multiple holes, and the height position of each level may not be compatible with the user. Summary of the invention

[0003] The object of the present invention is to provide an adaptive lifting handrail, comprising a handrail main body and a handrail tube assembly, wherein the handrail main body is installed at the upper end of the handrail tube assembly; the handrail tube assembly comprises an handrail outer tube and an handrail inner tube, wherein the handrail outer tube is sleeved on the handrail inner tube and can move up and down along the handrail inner tube; an elastic reset element is provided between the handrail outer tube and the handrail inner tube, wherein the elastic reset element enables the handrail outer tube to always have a tendency to pop up; the handrail main body is installed at the upper end of the handrail outer tube.

[0004] The armrest of the present invention is lifted and lowered by nesting and flexibly cooperating with the armrest outer tube and the armrest inner tube, and uses the force of the elastic reset element to balance the weight applied by the user, thereby achieving stepless adaptive lifting and lowering adjustment, so that the user's hands can enjoy a comfortable supporting state. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 It is a structural schematic diagram of the present invention.

[0006] Figure 2 The structural decomposition of the present invention Figure 1 .

[0007] Figure 3 It is a cross-sectional view of the present invention.

[0008] Figure 4 The structural decomposition of the present invention Figure 2 .

[0009] Figure 5 The structural decomposition of the present invention Figure 3 .

[0010] Figure 6 It is a structural exploded view of the armrest body of the present invention. DETAILED DESCRIPTION

[0011] Combine the following Figures 1 to 6 , further describe this application scheme:

[0012] An adaptive lifting handrail comprises a handrail body 1 and a handrail tube assembly 2, wherein the handrail body 1 is mounted on the top of the handrail tube assembly 2; the handrail tube assembly 2 comprises a handrail outer tube 21 and a handrail inner tube 22, wherein the handrail outer tube 21 is sleeved on the upper part of the handrail inner tube 22 and can move up and down along the handrail inner tube 22; an elastic reset element 23 is provided between the handrail outer tube 21 and the handrail inner tube 22, wherein the elastic reset element 23 makes the handrail outer tube 21 always have a tendency to pop up; the handrail body 1 is mounted on the upper end of the handrail outer tube 21.

[0013] The armrest of the present technical solution is raised and lowered by the nested and movable cooperation of the armrest outer tube 21 and the armrest inner tube 22, and the force of the elastic reset element 23 is balanced with the weight applied by the user, thereby achieving stepless adaptive lifting and lowering adjustment, so that the user's hands can enjoy a comfortable supporting state.

[0014] Specifically: an outer tube end cover 211 is fixedly provided at the upper end of the handrail outer tube 21; an inner tube end cover 221 is fixedly provided at the upper end of the handrail inner tube 22; the elastic reset element 23 is a spring, one end of the spring abuts against the outer tube end cover 211, and the other end abuts against the inner tube end cover 221.

[0015] An outer tube limiting hole 212 is provided on the handrail outer tube 21, and the outer tube limiting hole 212 extends along the axial direction of the handrail outer tube; a limiting member 24 is provided on the handrail inner tube 22, and the limiting member 24 is passed through the outer tube limiting hole 212 and there is a movable gap between the limiting member 24 and the hole wall of the outer tube limiting hole 212, so that when the handrail outer tube 21 moves up and down, the outer tube limiting hole 212 can move relative to the limiting member 24.

[0016] The outer tube limiting hole 212 has an upper extension end 2121 and a lower extension end 2122; when the upper extension end 2121 of the outer tube limiting hole 212 abuts against the limiting member 24, the armrest outer tube 21 is at the downward movement limit; when the lower extension end 2122 of the outer tube limiting hole 212 abuts against the limiting member 24, the armrest outer tube 21 is at the upward movement limit.

[0017] The cooperation between the outer tube limiting hole 212 and the limiting member 24 limits the upward and downward movement range of the handrail outer tube 21 and limits the circumferential rotation of the handrail outer tube 21 at the same time.

[0018] The limiting member 24 is a screw or a column fixed on the handrail inner tube 22 .

[0019] In this embodiment, the limiting member 24 is a screw, which is easier to install than a column; a screw hole 222 for installing the screw is provided on the handrail inner tube 22; the nut portion of the screw is exposed on the handrail outer tube 21 and the outer diameter is greater than the width of the outer tube limiting hole 212.

[0020] The plastic inner sleeve 25 is nested in the handrail outer tube 21; the plastic inner sleeve 25 is provided with an inner sleeve limiting hole 251 corresponding to the shape of the outer tube limiting hole 212. The plastic inner sleeve 25 is a hollow tube, and a convex edge 252 extending radially outward is provided at its lower end. During installation, the plastic inner sleeve 25 is inserted into the handrail outer tube 21 from the tube opening at the lower end of the handrail outer tube 21, and the outer wall of the plastic inner sleeve 25 is in close contact with the inner wall of the handrail outer tube 21, the convex edge 252 is in close contact with the lower end surface of the handrail outer tube 21, and the inner sleeve limiting hole 251 is aligned with the outer tube limiting hole 212.

[0021] The provision of the plastic inner sleeve 25 can avoid collision and friction between metal pipes, and solve the problem of noise generated by friction between the handrail outer tube 21 and the handrail inner tube when the handrail outer tube 21 moves.

[0022] like Figure 2 As shown, when installing the handrail tube assembly 2, first embed the plastic inner sleeve 25 into the handrail outer tube 21, then put the spring into the handrail outer tube 21, and then insert the handrail inner tube 22 into the handrail outer tube 21 from the tube opening at the lower end of the handrail outer tube 21, so that the screw hole 222 on the handrail inner tube 22 is exposed from the outer tube limiting hole 212, and finally install the screw (limiting piece) on the handrail inner tube 22.

[0023] A connecting plate 3 is installed on the top of the handrail outer tube 21, and a first connecting hole 31 is provided on the connecting plate 3; a groove 10 corresponding to the shape of the connecting plate 3 is provided at the bottom of the handrail body 1, and a second connecting hole 101 is provided at the bottom of the groove 10; the connecting plate 3 is embedded in the groove 10, and the first connecting hole 31 and the second connecting hole 101 are connected by a first screw 4 for fixation.

[0024] The armrests of most chairs are one-piece plastic parts that cannot be disassembled, making packaging difficult and costly, and they are easily damaged during transportation.

[0025] The handrail tube assembly of the present technical solution is fixed to the handrail body 1 by means of screws through the connecting piece 3. It is a detachable connection and can be disassembled for packaging and sale, thus saving space, reducing packaging materials, being environmentally friendly and saving costs. In addition, the installation operation is simple, which is convenient for consumers to assemble by themselves and also convenient for after-sales maintenance and replacement.

[0026] The armrest body 1 includes a cover 11 and a bottom shell 12; the upper end of the bottom shell 12 has an opening 120, and the edge of the bottom surface of the cover 11 is provided with an annular limiting rib 113, the cover 11 covers the opening 120 of the bottom shell 12 and the limiting rib 113 is tightly matched with the opening 120 of the bottom shell 12; the cover 11 is connected and fixed to the bottom shell 12 by a second screw 5.

[0027] In addition to the one-piece plastic armrests on the market, there are also some detachable armrests that are made of multiple plastic parts such as a top cover, a middle cover, and a bottom cover. The armrest body of the present technical solution only requires the top cover and the bottom shell to be connected and fixed, which not only reduces the cost but also reduces the difficulty of assembly.

[0028] The edge of the top surface of the cover 11 is an arc chamfered edge; the transition is smooth and not prone to scratches.

[0029] The bottom surface of the bottom shell 12 is an arc surface, and the connecting piece 3 is an arc shape. In appearance, the connecting piece 3 and the bottom shell 12 are both arc-matched, and after assembly, they do not protrude from the surface of the bottom shell 12, and the appearance is not affected.

[0030] A connecting column 111 extending into the bottom shell 12 is provided on the bottom side of the surface cover 11, and a third connecting hole 112 is provided on the connecting column 111, and the third connecting hole 112 is a blind hole; a fourth connecting hole 121 is provided at the bottom of the bottom shell 12; the fourth connecting hole 121 is an inward-turned hole, and the fourth connecting hole 121 is folded on the inner side of the bottom shell 12 to form a ring platform 122, and the connecting column 111 is against the ring platform 122; the second screw 5 is passed through the fourth connecting hole 121 and the third connecting hole 112.

[0031] like Figure 6 As shown, during installation, the second screw 5 is inserted from the bottom of the bottom shell 12 through the fourth connection hole 121 into the bottom shell 12 and connected to the third connection hole 112 on the connection column 111. The connection column 111 abuts against the ring 122 on the inner side of the inverted hole, so that the third connection hole 112 and the fourth connection hole 121 are connected and will not be misaligned, reducing the difficulty of self-installation.

[0032] The second screw is preferably a long screw. Since the third connection hole 112 is a blind hole, the screw will not be exposed on the top of the cover 11, and will not affect the appearance. Compared with the assembly method of directly screwing from the top of the cover 11, the cover 11 of the technical solution has no perforation and is not easy to crack.

[0033] The cover 11 is a plastic part, which is easy to shape and process. The bottom shell 12 is a metal part, which is stable and not easy to deform, environmentally friendly and durable, and prolongs the service life of the armrest.

[0034] The connecting piece 3 is a metal piece, and the connecting piece 3 is welded to the top of the handrail outer tube 21 .

[0035] Specifically, the top of the handrail outer tube 21 is penetrated on the connecting plate 3 through the through hole on the connecting plate 3 and fixed by welding.

[0036] The bottom of the groove 10 is provided with a tube hole 102 for the top of the handrail outer tube 21 to penetrate. Figure 5As shown, during installation, the upper end of the handrail outer tube 21 is extended into the bottom shell 12 through the tube hole 102, the connecting piece 3 is embedded in the groove 10 and connected with the bottom surface of the bottom shell 12, and then the first screw 4 is screwed in to connect the first connecting hole 31 and the second connecting hole 101 for fixing.

[0037] The armrest inner tube 22 is L-shaped, and a fixing piece 6 is provided at the end of the bottom of the armrest inner tube 22. The adaptive lifting armrest is connected to the seat body through the fixing piece 6. Specifically, the fixing piece 6 is connected to the seat body through screws.

[0038] The above-mentioned preferred implementation modes should be regarded as illustrative examples of the implementation modes of the present application scheme. Any technical deductions, replacements, improvements, etc. that are identical or similar to the present application scheme or made based on this scheme should be regarded as within the scope of protection of this patent.

Claims

1. An adaptive lifting handrail, comprising a handrail body and a handrail tube assembly, wherein the handrail body is mounted on the top of the handrail tube assembly; characterized in that: The handrail tube assembly comprises a handrail outer tube and a handrail inner tube, wherein the handrail outer tube is sleeved on the handrail inner tube and can move up and down along the handrail inner tube; An elastic reset element is provided between the outer tube of the handrail and the inner tube of the handrail, and the elastic reset element makes the outer tube of the handrail always have a tendency to pop up; the handrail body is installed on the upper end of the outer tube of the handrail; an outer tube end cover is provided on the upper end of the outer tube of the handrail; an inner tube end cover is provided on the upper end of the inner tube of the handrail; the elastic reset element is a spring, one end of the spring abuts against the outer tube end cover, and the other end abuts against the inner tube end cover; An outer tube limiting hole is provided on the outer tube of the handrail, and the outer tube limiting hole extends along the axial direction of the outer tube of the handrail; a limiting piece is provided on the inner tube of the handrail, and the limiting piece is inserted into the outer tube limiting hole and there is a movable gap between the limiting piece and the hole wall of the outer tube limiting hole; the outer tube limiting hole has an upper extension end and a lower extension end; when the upper extension end of the outer tube limiting hole abuts against the limiting piece, the outer tube of the handrail is at the lower movement limit; when the lower extension end of the outer tube limiting hole abuts against the limiting piece, the outer tube of the handrail is at the upper movement limit; the limiting piece is a screw or a column fixed on the inner tube of the handrail; A plastic inner sleeve is nested in the outer tube of the handrail; and an inner sleeve limiting hole corresponding to the shape of the outer tube limiting hole is opened on the plastic inner sleeve.

2. The adaptive lifting armrest according to claim 1, characterized in that: A connecting plate is installed on the top of the outer tube of the handrail, and a first connecting hole is provided on the connecting plate; The bottom of the armrest body is provided with a groove corresponding to the shape of the connecting piece, and the bottom of the groove is provided with a second connecting hole; The connecting piece is embedded in the groove and is fixed by connecting the first connecting hole and the second connecting hole through a first screw.

3. The adaptive lifting armrest according to claim 2, characterized in that: The armrest body includes a surface cover and a bottom shell; The upper end of the bottom shell has an opening, the edge of the bottom surface of the surface cover is provided with an annular limiting convex rib, the surface cover covers the opening of the bottom shell and the limiting convex rib is tightly matched with the opening of the bottom shell; The surface cover is connected and fixed to the bottom shell by a second screw.

4. The adaptive lifting armrest according to claim 3, characterized in that: A connecting column extending into the bottom shell is provided on the bottom side of the surface cover, and a third connecting hole is provided on the connecting column, and the third connecting hole is a blind hole; A fourth connection hole is provided at the bottom of the bottom shell; the fourth connection hole is an inward-turned hole, and the fourth connection hole is folded on the inner side of the bottom shell to form a ring platform, and the connection column abuts against the ring platform; The second screw is inserted into the fourth connecting hole and the third connecting hole.

5. The adaptive lifting armrest according to claim 3, characterized in that: The surface cover is a plastic part; the bottom shell is a metal part; The connecting piece is a metal piece, which is welded to the top of the outer tube of the handrail.

6. The adaptive lifting armrest according to claim 3, characterized in that: The edge of the top surface of the face cover is a circular chamfered edge; The bottom surface of the bottom shell is a curved surface, and the connecting piece is arc-shaped.

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