CN210204067U

CN210204067U - Armrest for chair

Info

Publication number: CN210204067U
Application number: CN201920128374.XU
Authority: CN
Inventors: Jianglin Wang; 王江林; Decai Li; 李德才
Original assignee: ANJI HENGLIN TECHNOLOGY DEVELOPMENT Co Ltd
Current assignee: ANJI HENGLIN TECHNOLOGY DEVELOPMENT Co Ltd
Priority date: 2019-01-25
Filing date: 2019-01-25
Publication date: 2020-03-31
Anticipated expiration: 2029-01-25

Abstract

The utility model relates to a thing to sit on field especially relates to a handrail for chair. The utility model provides an armrest for chair, includes the fixed bolster with chair body side fixed connection, the fixed bolster is for including the L type of horizontal end and perpendicular end, and its perpendicular end intermediate position is equipped with the rotation axis, the activity handrail has been cup jointed on the rotation axis, the tail end of activity handrail is equipped with the shaft hole that matches with the rotation axis, handrail front end upper portion lock joint has the handrail lid, all be equipped with stopper and concentric arc spacing groove with it on rotation axis and the shaft hole, the rotation axis set up with use the axle center as two through-holes of symmetry point, the rotation axis passes shaft hole rear surface lid and is equipped with the connection piece, be equipped with on the connection piece with two screw of through-hole assorted, through-hole and screw interpolation are equipped with the screw, the screw tail end passes through the nut and fixes. The utility model discloses whole realization inventor's invention purpose has good economic value.

Description

Armrest for chair

Technical Field

The utility model relates to a thing to sit on field especially relates to a handrail for chair.

Background

A considerable portion of armrests for chairs currently on the market are of the following construction: comprises a fixed bracket fixedly connected with a chair body and a movable armrest connected with the fixed bracket through a movable shaft. The armrest with the structure is particularly suitable for the conditions of the environments with tight space, such as buses, cinemas, office chairs needing to be stacked and the like. But the handrail of traditional structure only sets up the stopper of two start and stop points on for the rotation axis and carries on spacingly, has found the not enough problem of intensity in the use, when people's upper part of the body passes through the elbow and presses on the handrail, the stopper fracture leads to the accident. Meanwhile, the problem of inconvenient rotation and the like is also generated when the device is used. As another example, the patent numbers are: 201120069031.4 and 2012220482170.4, which solves the problem of partial rotation inconvenience, but does not fundamentally change the structural strength. Meanwhile, the existing rotatable armrest has new problems: in present factory environment, traditional intensive trade of working all improves labor efficiency through industrial robot in the transformation, and above two current utility model's patent and traditional rotation handrail all have a problem, and structural component is a little more meticulous, and the tolerance is not enough, leads to unable current industrial robot of utilizing to assemble, can only pass through manual assembly. How to solve the above problems is the object of the inventors' invention.

Disclosure of Invention

In order to solve the above problems, an object of the present invention is to provide a chair armrest with flexible rotation, high structural strength, and large allowable tolerance.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a handrail for a chair comprises a fixing support fixedly connected with the side surface of a chair body, wherein the fixing support is an L-shaped structure comprising a transverse end and a vertical end, a rotating shaft is arranged at the middle position of the vertical end, a movable handrail is sleeved on the rotating shaft, the tail end of the movable handrail is provided with a shaft hole matched with the rotating shaft, a handrail cover is buckled at the upper part of the front end of the handrail, a limiting block and an arc-shaped limiting groove concentric with the limiting block are arranged on the rotating shaft and the shaft hole, the rotating shaft is provided with two through holes taking the shaft center as a symmetrical point, the rotating shaft penetrates through the shaft hole and is provided with a connecting sheet, the connecting sheet is provided with two screw holes matched with the through holes, screws are inserted into the through holes and the screw holes, the tail ends of the screws are fixed through nuts, the tail end of the movable handrail is provided with a cover plate groove concentric, the buckle is clamped with the connecting sheet. Among all prior art here, stopper and spacing groove all set up respectively on movable handle and fixed bolster, and the utility model discloses all be equipped with stopper and the arc spacing groove concentric with it on rotation axis and the shaft hole, that is to say the utility model discloses set up two pairs of stopper spacing grooves at least, moreover, separately set up, the intensity that has so maximized has improved, has solved the intensity problem in the invention purpose, the utility model discloses fixed bolster and movable handle all can the die sinking injection moulding, and in the assembly, the utility model discloses a structure of screw with the connection piece is fixed movable handle and is made the installation tolerance big, can install through industrial robot, and in the traditional technique, all have parts such as what spring, trip, need the manual work to install. To the flexibility, the utility model discloses accessible adjusting screw nut's the degree of screwing up is adjusted, and is very convenient.

As preferred, the upper and lower both ends of rotation axis lateral wall are equipped with two first stoppers that use the rotation axis axle center to set up as central symmetry, the rotation axis lateral wall left and right sides is equipped with two second spacing grooves that use the rotation axis axle center to set up as central symmetry, the shaft hole inner wall be equipped with first stopper assorted first spacing groove, the shaft hole side be equipped with second spacing groove assorted second stopper, first stopper card is established first spacing inslot, first spacing groove be with the endocentric arc in shaft hole, the second stopper card is established the second spacing inslot, the second spacing groove be with the endocentric arc in rotation axis. The structure utilizes the principle that the cross symmetrical structure is firm, thus also considering the simple type of die sinking and assembly and facilitating the mass production of industrial robots.

Preferably, the connecting piece is a concentric ring structure with a thick middle part and a thin edge, and a first notch and a second notch are formed in the edge of the connecting piece. The cover plate is convenient to mount and dismount.

Preferably, the cover plate is provided with a first buckle and a second buckle, the size of the first buckle is matched with that of the first notch, and the size of the second buckle is matched with that of the second notch. Because the damping that needs adjusting screw degree of screwing up to adjust the handrail is the flexibility, still be difficult to drop when the apron must be dismantled easily so, the apron of structure and connection piece accessible apron rotate to its buckle and the convenient dismantlement of breach like this. The cover is reversely operated, the cover plate can not fall off due to common external force, and the structure is convenient.

The utility model discloses whole realization inventor's invention purpose has good economic value.

Drawings

FIG. 1 is an exploded view of the present invention;

FIG. 2 is an exploded view of another angle structure of the present invention;

FIG. 3 is a schematic view of the fixing bracket of the present invention;

FIG. 4 is a schematic view of the movable armrest of the present invention;

FIG. 5 is a schematic view of the connecting sheet structure of the present invention;

FIG. 6 is a schematic view of the cover plate structure of the present invention;

fig. 7 is the structure diagram of the utility model after assembly.

The reference numbers in the drawings are as follows:

1 fixed bracket, 2 movable handrails, 3 screw caps, 4 cover plates, 5 connecting pieces, 11 rotating shafts, 12 first limit blocks, 13 second limit grooves, 21 handrail covers, 22 shaft holes, 23 first limit grooves, 24 second limit blocks, 51 first notches, 52 second notches, 41 first buckles and 42 second buckles,

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The armrest for the chair shown in the figures 1 to 7 comprises a fixing support 1 fixedly connected with the side surface of a chair body, wherein the fixing support 1 is an L-shaped structure comprising a transverse end and a vertical end, a rotating shaft 11 is arranged in the middle of the vertical end, a movable armrest 2 is sleeved on the rotating shaft 11, a shaft hole 22 matched with the rotating shaft is arranged at the tail end of the movable armrest, an armrest cover 21 is buckled at the upper part of the front end of the armrest, a limiting block and an arc-shaped limiting groove concentric with the limiting block are arranged on the rotating shaft 11 and the shaft hole 22, the rotating shaft 11 is provided with two through holes which take the shaft center as a symmetrical point, a connecting sheet 5 is covered on the surface of the rotating shaft 11 after the rotating shaft 11 passes through the shaft hole 22, two screw holes matched with the through holes are arranged on the connecting sheet 5, screws 31 are inserted into the through holes and the screw holes, and, the tail end of the movable handrail is provided with a cover plate groove concentric with the shaft hole 22, a cover plate 4 is clamped in the cover plate groove, a buckle is arranged on the inner surface of the cover plate 4, and the buckle is clamped with the connecting sheet 5. The upper and lower both ends of 11 lateral walls of rotation axis are equipped with two first stoppers 12 that use the 11 axle centers of rotation axis to set up as central symmetry, the 11 lateral walls left and right sides of rotation axis is equipped with two second spacing grooves 13 that use the 11 axle centers of rotation axis to set up as central symmetry, shaft hole 22 inner wall is equipped with the first spacing groove 23 with first stopper 12 assorted, shaft hole 22 side be equipped with second spacing groove 13 assorted second stopper 24, first stopper 12 card is established in first spacing groove 23, first spacing groove 23 be with the endocentric arc in shaft hole 22, second stopper 24 card is established in second spacing groove 13, second spacing groove 13 be with the endocentric arc in rotation axis 11. The connecting piece 5 is a concentric ring structure with thick middle and thin edge, and a first gap 51 and a second gap 52 are arranged at the edge. The cover plate 4 is provided with a first buckle 41 and a second buckle 42, the size of the first buckle 41 is matched with the first gap 51, and the size of the second buckle 42 is matched with the second gap 52.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an armrest for chair, includes fixed bolster (1) with chair body side fixed connection, fixed bolster (1) is the L type that includes horizontal end and perpendicular end, and its erects the end intermediate position and is equipped with rotation axis (11), movable armrest (2) have been cup jointed on rotation axis (11), movable armrest's tail end is equipped with shaft hole (22) that matches with the rotation axis, armrest front end upper portion lock joint has armrest lid (21), its characterized in that, all be equipped with stopper and arc spacing groove concentric with it on rotation axis (11) and shaft hole (22), rotation axis (11) seted up with two through-holes that use the axle center as the symmetric point, rotation axis (11) pass shaft hole (22) rear surface lid and are equipped with connection piece (5), be equipped with on connection piece (5) with two screw holes of through-hole assorted, through-hole and screw interpolation are equipped with screw (31), the tail end of the screw (31) is fixed through the nut (3), the tail end of the movable handrail is provided with a cover plate groove concentric with the shaft hole (22), a cover plate (4) is clamped in the cover plate groove, a buckle is arranged on the inner surface of the cover plate (4), and the buckle is connected with the connecting piece (5) in a clamping mode.

2. The armrest for the chair according to claim 1, wherein the upper and lower ends of the side wall of the rotating shaft (11) are provided with two first limiting blocks (12) symmetrically arranged around the axis of the rotating shaft (11), the left and right sides of the side wall of the rotating shaft (11) are provided with two second limiting grooves (13) symmetrically arranged around the axis of the rotating shaft (11), the inner wall of the shaft hole (22) is provided with a first limiting groove (23) matched with the first limiting block (12), the side edge of the shaft hole (22) is provided with a second limiting block (24) matched with the second limiting groove (13), the first limiting block (12) is clamped in the first limiting groove (23), the first limiting groove (23) is arc-shaped concentric with the shaft hole (22), and the second limiting block (24) is clamped in the second limiting groove (13), the second limiting groove (13) is arc-shaped concentric with the rotating shaft (11).

3. The armrest for chairs as claimed in claim 1, wherein the connecting piece (5) is a concentric ring structure with thick middle and thin edge, and has a first notch (51) and a second notch (52) formed at its edge.

4. The armrest for the chair as claimed in claim 3, wherein the cover plate (4) is provided with a first catch (41) and a second catch (42), and the first catch (41) is sized to match the first notch (51), and the second catch (42) is sized to match the second notch (52).