JP6768103B2 - Angle adjuster - Google Patents

Description

The present invention relates to an angle adjusting device for an armrest support pad of a chair, and mainly relates to an angle adjusting device having stability in adjusting the angle of the armrest support pad.

Well-known chairs are generally provided with armrests on both sides, and the armrests support the forearms to enhance sitting comfort, and a joint shaft that can be joined to the chair body is provided below the armrests and above the joint shaft. The front and rear support pads are fixedly connected, and the support pads can be used as a forearm armrest.
However, the seating posture of the user varies, and the angle of the forearm when the seated person rests, types, and performs other work is different, so the support pad with a fixed angle may be a situation. Therefore, it was not possible to fit in the direction of the forearm, and the low applicability of the forearm support was a drawback of the well-known chair.

In order to solve the above drawbacks and improve the applicability of the armrests, there are now support pads with adjustable angles. The bottom of the support pad is pivotally installed on the joint shaft, and the support pad rotates in response to the joint shaft to enable angle adjustment.
However, since the stability when the support pad and the joint shaft are combined is not good, it is not possible to stabilize the installation of the support pad on the joint shaft when the rotating force is large, and the angle of the support pad is changed. The inability to combine stably has always been a drawback. Prior art documents relating to well-known chairs include, for example, Patent Document 1.

JP-A-2010-89557

An object of the present invention is to provide a device having good stability in adjusting the angle of an armrest support pad.

The present invention is an angle adjusting device for an armrest support pad of a chair, including a joining shaft, a positioning piece, and a support pad.
The lower part of the joining shaft is joined to the chair body, the top end is provided with a lower joining surface, the lower joining surface is provided with a housing groove, a rotating groove, and at least one limit groove, and the center of the rotating groove is provided with a joining hole.
Further, the positioning piece is made of an elastic material, is installed in the accommodating groove of the joint shaft, and is provided with an elastic piece portion capable of flexible movement up and down, and a positioning body is provided above the elastic piece portion. Is projected.
The support pad is provided with a pedestal, and an upper joint surface is provided below the pedestal at a position corresponding to the lower joint surface of the joint shaft, and a rotation shaft is provided on the upper joint surface at a position corresponding to the rotation groove of the joint shaft. Is provided, the rotation shaft is provided with a joint hole in the center, and the support pad and the joint shaft can be combined by inserting the joint member into the joint hole between the support pad and the joint shaft, and the upper joint surface is A plurality of positioning grooves that are distributed at different angles and can be joined to the positioning body are provided at the positions corresponding to the positioning bodies, and the upper joint surface operates in the limit grooves at the positions corresponding to the limit grooves. A limit body that can be used is provided.

Preferably, the rotating groove of the joining shaft is provided at the rear position of the accommodating groove, and the arc-shaped rear limit groove provided in front of the accommodating groove and the arc-shaped front limit provided in front of the accommodating groove. Further includes a groove.
Further, the support pad is provided with a rear limit body capable of operating in the rear limit groove in front of the rotation shaft of the upper joint surface, and is located in front of the upper joint surface at a position corresponding to the front limit groove of the joint shaft. A front limit body that can move in the front limit groove is provided.
Further, the maximum rotation angle of the support pad can be limited by contacting the front limit body and the rear limit body with the side walls of the front limit body and the rear limit groove, respectively.

More preferably, the support pad
With the top lid
A through hole provided above the pedestal at a position corresponding to the joint hole through which the joint member can be inserted,
It further includes a plurality of insertion pins provided above the pedestal.
An insertion groove that can be joined to the insertion pin is provided below the upper lid.

In the present invention, after combining the parts, a wide area of the lower upper joint surface is joined between the joint shaft and the support pad, so that good combination stability can be provided.
In addition, the armrest is pivotally installed by the rotating shaft and the rotating groove, and the front and rear limit bodies are joined to the front limit groove and the rear limit groove, respectively, and the central position is joined to the positioning groove by the positioning body. By averaging and supporting the load, good combination stability can be provided.
Further, since the positioning piece is made of a good flexible material, the positioning body and the positioning groove can be provided with good positioning stability.
Further, since the side walls of the front limit groove and the rear limit groove can be provided for contact with the front limit body and the rear limit body, it is possible to ensure that the rotation does not shift excessively when the support pad is rotated, which is good. It is possible to provide stable operation and service life.

It is an exploded perspective view of this invention. It is a three-dimensional assembly perspective view of this invention. It is an assembly sectional view of this invention. It is an assembly plan view of this invention. It is the schematic plan view which showed the mode of adjusting the angle of the support pad of this invention.

(Example)
See FIGS. 1 to 4.
The present invention includes a joining shaft 1, a positioning piece 2, and a support pad 3.
The lower part of the joint shaft 1 is joined to the chair body (not shown), the upper part is provided with a lower joint surface 11, the lower joint surface 11 is provided with an accommodating groove 12 in the center, and the rear part of the accommodating groove 12 is provided with a rotating groove 13. The rotating groove 13 is provided with a joint hole 14 in the center, an arc-shaped rear limit groove 15 is provided in front of the rotating groove 13, and an arc-shaped front limit groove 16 is provided in front of the accommodating groove 12. It is provided.

The positioning piece 2 is made of an elastic material, is installed in the accommodating groove 12 of the joint shaft 1, and is further provided with an elastic piece portion 21 capable of flexible moving operation up and down, and is above the elastic piece portion 21. The positioning body 22 is convexly provided on the surface.

The support pad 3 includes a pedestal 31 and an upper lid 32.
An upper joint surface 311 is provided below the pedestal 31 at a position corresponding to the lower joint surface 11 of the joint shaft 1, and a rotation shaft 312 is provided on the upper joint surface 311 at a position corresponding to the rotation groove 13 of the joint shaft 1. is provided, the central communication hole 313 is provided in the rotation shaft 312, also above the pedestal 31 through hole 314 is provided at a position corresponding to the communicating hole 313, and the through-hole 314 of the support pad 3 and it can be combined supporting pad 3 and the bonding shaft 1 by bonding member 315 to the joint hole 14 of the communicating hole 313 and the bonding shaft 1 is inserted.
Further, a rear limit body 316 capable of operating in the rear limit groove 15 is provided in front of the rotation shaft 312, and a front limit is provided in front of the upper joint surface 311 at a position corresponding to the front limit groove 16 of the joint shaft 1. A front limit body 317 that can move in the groove 16 is provided.
The front and rear limit bodies 317 and 316 can limit the maximum rotation angle of the support pad 3 by contacting the side walls of the front and rear limit grooves 16 and 15, respectively, and the positioning body 22 is placed on the upper joint surface 311. A plurality of positioning grooves 318 distributed at different angles are provided at positions corresponding to, a plurality of insertion pins 319 are provided above the pedestal 31, and an insertion pin 319 is provided on the bottom surface of the upper lid 32. A plurality of insertion grooves 321 that can be joined are provided.

When assembling the present invention, the positioning piece 2 is placed in the accommodating groove 12 of the joining shaft 1, and the positioning body 22 is turned upward.
Further, the pedestal 31 and the upper lid 32 of the support pad 3 are separated, and the lower joint surface 11 is applied to the upper joint surface 311 so that the rotation shaft 312 can be fitted into the rotation groove 13 at the same time, so that the front / rear limit bodies 317, The 316 can be fitted into the front and rear limit grooves 16 and 15, respectively.
Also attached is inserted through holes 314 and the communication hole 313 and the bonding member 315 to the joint hole 14 of the joint shaft 1 of the pedestal 31, may be coupled with a positioning groove 318 corresponding positioning member 22 in a central position when the ..
Further, if the upper lid 32 is put on the pedestal 31 and the insertion groove 321 is joined to the insertion pin 319, the combination can be completed, the assembly is easy, and the combination of the armrests can be provided with a good overall texture. it can.
Since the positioning piece 2 of the present invention is a compact and independent component, the cost can be reduced, and a good service life can be provided by manufacturing using a material having good elasticity and resistance to tearing. ..

According to the present invention, good combination stability can be provided by joining the lower and upper joint surfaces 11 and 311 having a wide area between the joint shaft 1 and the support pad 3 after the combination.
Further, the armrest is joined to the rotating shaft 312 by the rotating groove 13, and the armrest is joined to the front and rear limit grooves 16 and 15 by the front and rear limit bodies 317 and 316, respectively, and the center position is formed by the positioning body 22. It can be joined to the positioning groove 318. As a result, it is possible to provide good combination stability by supporting the load on average, and it is possible to prevent the support pad 3 from being displaced when the arm is placed on the support pad 3.

See FIGS. 3-5.
The angle of the support pad 3 of the present invention can be adjusted according to the position of the forearm of the seated person.
In the present invention, when the support pad 3 rotates in response to the joining shaft 1, the elastic piece 21 of the positioning piece 2 flexibly moves up and down, and the positioning body 22 is joined to the positioning grooves 318 at different angles. be able to.
Further, when the support pad 3 rotates, the rotation shaft 312 can rotate in the rotation groove 13, and at the same time, the joint member 315 can better improve the strength of the pivot position.
Further, during the rotational operation of the support pad 3, the front / rear limit bodies 317 and 316 are simultaneously joined to the front / rear limit grooves 16 and 15 in the front-rear direction of the pivot position, so that good operation stability can be provided.

In the present invention, since the positioning piece 2 is made of a good flexible material, the positioning body 22 and the positioning groove 318 can be provided with good positioning stability.
Further, since the side walls of the front / rear limit grooves 16 and 15 can be provided for contact with the front / rear limit bodies 317 and 316, it is possible to ensure that the rotation of the support pad 3 does not shift excessively, and the operation is good. Can be provided with stability and service life.

Summarizing the above, the present invention has good assembly reliability and stability in positioning of the support, and the above-mentioned examples exemplify the present invention and do not limit the present invention by any means. All modifications that provide equivalent effects based on the spirit of the invention fall within the scope of the invention.

Although detailed explanations have been given with specific examples, many modifications and changes can be made without departing from the technical scope of the present invention, and the scope of the present invention is defined by the scope of claims.

1 Joint shaft 11 Lower joint surface 12 Accommodation groove 13 Rotating groove 14 Joint hole 15 Rear limit groove 16 Front limit groove 2 Positioning piece 21 Elastic piece 22 Positioning body 3 Support pad 31 Pedestal 311 Upper joint surface 312 Rotating shaft 313 Communication Hole 314 Through hole 315 Joining member 316 Rear limit body 317 Front limit body 318 Positioning groove 319 Insertion pin 32 Top lid 321 Insertion groove

Claims (3)

It is an angle adjustment device for the support pad of the armrest of the chair.
The lower part is joined to the chair body, the top end is provided with a lower joint surface, the lower joint surface is provided with a housing groove, a rotation groove, and at least one limit groove, and the rotation groove is a joint having a joint hole in the center. With the shaft
It is made of an elastic material, is installed in the accommodating groove of the joint shaft, and is further provided with an elastic piece portion capable of flexible moving operation up and down, and a positioning body is convexly provided above the elastic piece portion. With the positioning piece that is
A pedestal is provided, and an upper joint surface is provided below the pedestal at a position corresponding to the lower joint surface of the joint shaft, and the upper joint surface is rotated to a position corresponding to the rotation groove of the joint shaft. rotary shaft is provided, wherein the center of the rotating shaft is provided communication holes, and combining the joint shaft and the support pad by the bonding member in contact Goana support pad and the junction shaft is inserted The upper joint surface is provided with a plurality of positioning grooves that are distributed at different angles at positions corresponding to the positioning body and can be joined to the positioning body, and the upper joint surface is provided. A support pad provided with a limit body capable of operating in the limit groove at a position corresponding to the limit groove, and an angle adjusting device. The rotation groove of the joint shaft is provided at a position rearward of the accommodation groove, and has an arc-shaped rear limit groove provided in front of the rotation groove and an arc-shaped rear limit groove provided in front of the accommodation groove. Including the front limit groove
Further, the support pad is provided with a rear limit body capable of operating in the rear limit groove in front of the rotation shaft of the upper joint surface, and in front of the upper joint surface is the front of the joint shaft. A front limit body that can move in the front limit groove is provided at a position corresponding to the limit groove.
The first aspect of the present invention is characterized in that the front limit body and the rear limit body are in contact with the side wall of the front limit groove and the rear limit groove, respectively, to limit the maximum rotation angle of the support pad. Angle adjustment device. The support pad
With the top lid
A through hole provided above the pedestal at a position corresponding to the communication hole and through which the joining member can be inserted.
Further including a plurality of insertion pins provided above the pedestal,
The angle adjusting device according to claim 1, wherein an insertion groove that can be joined to the insertion pin is provided below the upper lid.

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