Adjustable Armrest Support Assembly for Chair

Abstract

An armrest support assembly for chair includes an upright support member, an outer tube movably and adjustably mounted on the support member and two opposite resting members each secured in the outer tube to move in concert with the outer tube and each abutting the support member during movement of the outer tube relative to the support member. Thus, when the outer tube is moved relative to the support member, the inner wall of each of two resting members presses the support member closely and tightly to stabilize movement of the outer tube relative to the support member, so that the outer tube is moved relative to the support member smoothly and stably without incurring vibration.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an armrest support and, more particularly, to an adjustable armrest support assembly for chair.

2. Description of the Related Art

A conventional armrest support assembly 1 for chair in accordance with the prior art shown in FIG. 6 comprises an upright support member 11, an outer tube 10 movably mounted on the support member 11 and two spaced limit plates 12 each secured on the support member 11 and each abutting an inner wall of the outer tube 10. However, the outer tube 10 is not fitted on the support member 11 closely so that the outer tube 10 is not moved on the support member 11 smoothly and stably, thereby easily incurring vibration during movement of the outer tube 10 relative to the support member 11.

BRIEF SUMMARY OF THE INVENTION

In accordance with the present invention, there is provided an armrest support assembly for chair, comprising an upright support member, an outer tube movably and adjustably mounted on the support member and two opposite resting members each secured in the outer tube to move in concert with the outer tube and each abutting the support member during movement of the outer tube relative to the support member.

The primary objective of the present invention is to provide an armrest support assembly that is operated smoothly and stably.

According to the primary objective of the present invention, when the outer tube is moved relative to the support member, the inner wall of each of two resting members presses the support member closely and tightly to stabilize movement of the outer tube relative to the support member, so that the outer tube is moved relative to the support member smoothly and stably without incurring vibration.

Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S)

FIG. 1 is a perspective view of an armrest support assembly for chair in accordance with the preferred embodiment of the present invention.

FIG. 2 is an exploded perspective view of the armrest support assembly for chair as shown in FIG. 1.

FIG. 3 is a cross-sectional view of the armrest support assembly for chair taken along line 3-3 as shown in FIG. 1.

FIG. 4 is a locally enlarged view of the armrest support assembly for chair taken along a circle “A” as shown in FIG. 3.

FIG. 5 is a schematic operational view of the armrest support assembly for chair as shown in FIG. 3.

FIG. 6 is an exploded perspective view of a conventional armrest support assembly for chair in accordance with the prior art.

DETAILED DESCRIPTION OF THE INVENTION

Referring to the drawings and initially to FIGS. 1-4, an armrest support assembly for chair in accordance with the preferred embodiment of the present invention comprises an upright support member 3, an outer tube 2 movably and adjustably mounted on the support member 3, and two opposite resting members 4 each secured in the outer tube 2 to move in concert with the outer tube 2 and each abutting the support member 3 during movement of the outer tube 2 relative to the support member 3.

The outer tube 2 has an inner wall provided with two opposite locking ribs 21. Each of the two locking ribs 21 of the outer tube 2 has a substantially convex arcuate cross-sectional profile as shown in FIG. 4.

The two resting members 4 are located at two opposite sides of the support member 3 to surround and clamp the support member 3 between the two resting members 4. Each of the two resting members 4 has an elongate inner wall 45 pressing the support member 3 during movement of the outer tube 2 relative to the support member 3. Each of the two resting members 4 has a lower end provided with a locking groove 42 locked onto a respective one of the two locking ribs 21 of the outer tube 2 to lock each of two resting members 4 in the outer tube 2. The lower end of each of the two resting members 4 is provided with an outwardly protruding lower pressing plate 41 pressing the inner wall of the outer tube 2. The locking groove 42 of each of the two resting members 4 is formed in the lower pressing plate 41. Each of the two resting members 4 has an upper end provided with an outwardly protruding upper pressing plate 43 pressing the inner wall of the outer tube 2.

In operation, referring to FIGS. 4 and 5 with reference to FIGS. 1-3, each of two resting members 4 is locked in the outer tube 2 to move in concert with the outer tube 2, and the support member 3 is surrounded and clamped between the two resting members 4, so that when the outer tube 2 is moved relative to the support member 3, each of two resting members 4 presses the support member 3 closely and tightly to stabilize movement of the outer tube 2 relative to the support member 3. Thus, the outer tube 2 is moved relative to the support member 3 smoothly and stably without incurring vibration.

Accordingly, when the outer tube 2 is moved relative to the support member 3, the inner wall 45 of each of two resting members 4 presses the support member 3 closely and tightly to stabilize movement of the outer tube 2 relative to the support member 3, so that the outer tube 2 is moved relative to the support member 3 smoothly and stably without incurring vibration.

Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the invention.

Claims

1. An armrest support assembly for chair, comprising:

an upright support member;

an outer tube movably and adjustably mounted on the support member;

two opposite resting members each secured in the outer tube to move in concert with the outer tube and each abutting the support member during movement of the outer tube relative to the support member.

2. The armrest support assembly for chair of claim 1, wherein

the outer tube 2 has an inner wall provided with two opposite locking ribs;

each of the two resting members 4 has a lower end provided with a locking groove locked onto a respective one of the two locking ribs of the outer tube to lock each of two resting members in the outer tube.

3. The armrest support assembly for chair of claim 2, wherein the lower end of each of the two resting members is provided with an outwardly protruding lower pressing plate pressing the inner wall of the outer tube.

4. The armrest support assembly for chair of claim 3, wherein the locking groove of each of the two resting members is formed in the lower pressing plate.

5. The armrest support assembly for chair of claim 1, wherein each of the two locking ribs of the outer tube has a substantially convex arcuate cross-sectional profile.

6. The armrest support assembly for chair of claim 1, wherein the two resting members are located at two opposite sides of the support member to surround and clamp the support member between the two resting members.

7. The armrest support assembly for chair of claim 1, wherein each of the two resting members has an elongate inner wall pressing the support member during movement of the outer tube relative to the support member.

8. The armrest support assembly for chair of claim 1, wherein each of the two resting members has an upper end provided with an outwardly protruding upper pressing plate pressing the inner wall of the outer tube.