JPH1156525A - Chair with armrest - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily adjust the height of an armrest without making a system large. SOLUTION: An armrest 20 height adjusting means 50 comprises plural engagement recessed part 51 which are separated and formed in a support member 10 in a vertical direction, an engagement projected part 52 which is provided so as to be engagement/engagement-release possible with the respective engagement recessed part 51 in the cover part 25 of the armrest 20 and an operation member 54B for connecting the engagement projected part 52 with an operating part. Then, the operating part is formed by an operation lever 54 which is supported by the cover part 25 so as to be rotatable with a spindle part 57 in its lower end part and a finger hook part 58 is provided in a part upper than the lower end part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair with armrests capable of adjusting the height of armrests.

[0002]

2. Description of the Related Art A conventional structure of a chair with armrests is shown in FIG.
(B) and shown in FIG. In these figures, 1 is a leg, 3 is a seat, 5 is a backrest, 10 is a supporting member, 20 is an armrest, and 50P is a height adjusting means for an armrest.

As shown in FIGS. 3 (A) and 3 (B), the seat 3 is provided on an upper portion of the leg 1, and a support member 10 for mounting an armrest is provided on both left and right sides thereof. . The armrests 20 (the main body 20D and the cover 25) are respectively mounted on the support members 10 so as to be movable in the vertical direction (Z direction).

As shown in FIG. 4, the height adjusting means 50P is provided with a plurality of engaging recesses 51 formed in the support member 10 in the vertical direction (Z direction) and a cover portion 25 of the armrest 20, respectively. An operating portion (54P) connected to the engaging convex portion (52) and an engaging convex portion (engaging pin 52) provided to be capable of engaging and disengaging with the concave portion 51, 54P) is engaged with the engaging protrusion (52) and the engaging recess 5 when the predetermined rotation operation is performed.
1 can be engaged and disengaged. The operation section is formed of an operation lever 54P whose upper end is rotatably mounted on the cover section 25 via the support shaft section 57P. In FIG. 4, the operation unit (54 </ b> P) is connected to the engagement protrusion (52) via the operation member 53.

[0005] Therefore, in order to adjust the height of the armrest 20, as shown in FIG.
When the counterclockwise rotation (R1 direction) in the figure is rotated about the center 7P, the operating member 53 moves rightward in FIG. 4 to disengage the engagement projection (52) and the engagement recess 51. You. Thereby, the armrest 20 is unlocked, and the vertical direction (Z direction)
To a free state.

Next, in this state, the armrest 20 is moved up and down (Z direction) to stop at a desired height position, and then the pressing force applied to the operation lever 54P is released.
Then, the operation lever 54P is moved to the return spring member 59SP.
4 rotates clockwise in FIG. 4 so that the engaging projection (52) and the engaging recess 51 at the same height position are engaged. Thereby, the armrest 20 can be locked at a desired height position.

The height of the armrest 20 is generally adjusted by a person sitting on the seat 3 while placing his / her elbow on the main body 20D of the armrest 20 and watching the condition.

[0008]

In the chair with armrests described above, when the engaging projections (52) and the engaging recesses 51 are engaged, the total weight of the armrests 20 is reduced by the engaging projections (5).
2), it acts in a concentrated manner on the engaging concave portion 51, so that when the engaging convex portion (52) is moved out of the engaging concave portion 51, a large frictional force is generated between the two (52, 51). I do.

Therefore, when the two (52, 51) are disengaged from each other, a large rotational moment is applied to the operation lever 54P, and a large force (pressing force) that overcomes the frictional force is applied to the engaging projection (52). ) Must be added.

In particular, when the engagement protrusion (52) has a tendency to bite into the engagement recessed portion 51 during the engagement state due to long-term use or the like, it is necessary to apply a larger rotating moment to the operation lever 54P. There is.

Here, the hand (H) is applied to the operation lever 54P.
In the case of pressing each finger of D), the magnitude of the rotational moment is proportional to the distance from the position where each pressing force is applied to the support shaft 57P. Therefore, in order to increase the rotational moment acting on the operation lever 54P, it is more effective to press a lever portion farther away than to press a lever portion close to the support shaft portion 57P.

By the way, a person sitting on the seat (3)
When a finger of a hand (HD) is put on the operation lever 54P to adjust the height of the armrest 20, a little finger is put on a portion of the operation lever 54P far from the support shaft portion 57P.

However, since the operating lever 54P is lower than the elbow of the above-mentioned person, each finger hung on the lever 54P faces obliquely downward, and the short little finger among the fingers is the operating lever 54P. It is hard to hang on. In some cases, it may be necessary to start over. Moreover, the little finger is not suitable for applying a large force unlike the index finger.

Therefore, it is difficult to apply a large rotational moment to the operation lever 54P. In particular, the operation lever 54P
If the person who operates is a woman or a child whose fingers are shorter than a general adult man, it becomes more difficult to adjust the height of the armrest 20 by rotating the operation lever 54P.

In view of this, it is conceivable to increase the length of the operation lever 54P to increase the distance from each part on which each finger of the hand is hooked to the support shaft 57P. And so on, which is problematic from the viewpoint of economy and design.

It is conceivable that the position of the finger on the operating lever 54P is shifted downward as a whole and the index finger is hooked on a lever portion far away from the support shaft portion 57P. Cannot be used effectively, and it is difficult to easily turn the operation lever 54P.

Further, when the armrest 20 is raised while the operation lever 54P is pressed with the finger of the hand (HD), the armrest 20 drops vigorously, for example, the finger slips from the operation lever 54P. The person who adjusts the height position may be injured unexpectedly. In particular, such an accident is likely to occur in summer or the like where it is easy to sweat on the palm.

An object of the present invention is to provide a chair with armrests which can easily and reliably adjust the height.

[0019]

According to a first aspect of the present invention, an armrest is provided on a support member on both sides of a seat so as to be vertically adjustable through height adjustment means, and the height adjustment means is provided with a height adjustment means. ,
A plurality of engagement recesses formed in the support member in the vertical direction; an engagement projection provided on the armrest cover so as to be able to engage and disengage with each of the engagement recesses; And an armrest that is formed so that when the operating part is rotated by a predetermined amount, the engaging protrusion moves to engage with and disengage from the engaging recess. The lower portion is formed of an operation lever having a lower end portion rotatably supported by the cover portion via a support shaft portion and a finger hook portion provided above the lower end portion.

According to the invention, for example, when a person sitting on the seat portion performs a predetermined rotation operation by placing a finger on a finger hook portion of the operation lever to adjust the height of the armrest, the operation lever is set to the above-mentioned operation lever. Since the finger is lower than the elbow of the person, the finger of the hand is hung on the finger-holding portion obliquely downward.

Since the lower end of the operating lever is rotatably supported, a portion of the finger-holding portion of the operating lever farthest from the support shaft (a portion having the longest arm of the rotational moment). , The index finger of the above-mentioned person is hung.

Since the index finger is relatively long among the fingers of the hand and can be moved toward the thumb without being hindered by other fingers, it can be easily set at an angular position orthogonal to the finger hook.
It is possible to reliably and strongly press a portion of the finger hook portion farthest from the support shaft portion. At the same time, other parts of the finger rest can be pressed by each finger other than the index finger.

Therefore, a large rotational moment is applied to the operation lever, whereby the lever can be more easily and smoothly rotated. As a result, the height can be easily and reliably adjusted.

According to a second aspect of the present invention, there is provided a chair with armrests, wherein a projection is provided above a fingerrest of the operation lever.

According to this invention, the same operation and effect as those of the first aspect of the invention can be obtained. In addition, the person sitting on the seat raises the armrest while the finger of the hand rests on the finger holder of the operation lever.
When it is lowered (especially when it is raised), it is possible to more reliably prevent the index finger or the like from coming off the finger hook portion, and to further improve safety.

According to a third aspect of the present invention, there is provided a chair with armrests having a sloping surface in which the amount of outward projection increases as the front end face below the most protruding part of the projection of the operation lever goes upward. .

In this invention, for example, when a person sitting on the seat raises the armrest to adjust the height position, the index finger is put on the inclined surface of the projection, and the other fingers lightly touch the finger hook ( When the hand is lifted in a state of contact or non-contact, the operation lever is rotated about the support shaft portion by a pushing force acting on the inclined surface from the index finger. This allows
The engagement between the engaging projection and the engaging recess is released. At this time, the projection prevents the index finger or the like from coming off the finger rest, so that a situation in which the arm rest falls during the ascent can be more reliably prevented.

As described above, by simply lifting the hand with the index finger in contact with the inclined surface of the projection, the locked state of the armrest can be released and the operation can be smoothly shifted to the ascending operation. Therefore, in addition to providing the same operation and effect as the case of the invention of claim 2, the armrest can be more easily and smoothly raised to adjust the height.

[0029]

Embodiments of the present invention will be described below with reference to the drawings. The chair with armrests is shown in FIGS.
As shown in FIG. 5, the basic configuration is the same as that of the conventional example (FIGS. 3 and 4), but the operation lever 54 as the operation unit of the height adjusting means 50 is moved to the lower end (support shaft 57). Is provided so as to be rotatable around the center.

The same components as those in the conventional example (FIGS. 3 and 4) are denoted by the same reference numerals, and description thereof will be simplified or omitted.

First, as shown in FIG. 1, the support member 10 is formed of, for example, a metal pipe material having an elliptical cross section. The armrest 20 includes a main body 20D that directly receives the user's arm, elbow, and the like, and the main body 20D is supported by the supporting member 1
And a cover portion 25 for mounting vertically on the cover. The main body 20D and the cover 25
Is made of, for example, a synthetic resin.

More specifically, the cover portion 25 is provided with an inner guide portion 27 that slides on the outer surface 11 of the support member 10 and a middle support portion 28 that slides on the inner surface 12 of the support member 10. The cooperation between the inner guide portion 27 of the cover portion 25 and the middle support portion 28 allows the armrest 20 to move in the vertical direction (Z direction) along the support member 10 without rattling.

As shown in FIG. 1, an operation lever 54 also serving as an operation member (53) is provided on the cover 25 so as to be rotatable via a support shaft 57. When the operating lever 54 is pressed against the elastic force of the return spring member 59SP and rotated in the clockwise direction (R2 direction) around the support shaft 57 in the drawing, the engaging projection (52) Moves rightward in the drawing to release the engagement relationship with the engagement recess 51. When the pressing of the operation lever 54 is released, the lever 54 rotates counterclockwise (R1 direction) in the figure by the elastic force of the return spring member 59SP, and as a result, the engagement protrusion (52). Engages with the engaging concave portion 51 at the same height position.

Generally, when the operating lever of the height adjusting means is turned by applying a pressing force, the pressing force is applied to a portion far from the turning fulcrum (support shaft portion) rather than to a portion near the turning fulcrum (support shaft portion). Since the distance from the fulcrum is increased, a larger rotational moment can be applied. That is, the operation lever can be more easily rotated.

On the other hand, when a person sitting on the arm of a chair with armrests tries to put his fingers on the operation lever, each finger is directed obliquely downward, but the index finger is compared with the fingers of the hand. It can be easily moved to the thumb side without being hindered by other fingers and can easily be set at an angle position perpendicular to the finger hook, so that a greater force can be reliably applied to the operation lever compared to other fingers. it can.

Therefore, according to the present invention, the operation lever is arranged so that when the person sitting on the seat (3) puts the finger of the hand (HD) on the operation lever 54, the forefinger is positioned far from the pivot point. The lower end of the cover 54 is connected to the cover 2 via the support shaft 57.
5 so as to be rotatable, and the operation lever 54
The finger hook 58 is provided above the lower end of the finger.

In this embodiment, the operation lever 54
Is provided on the upper part of the finger hook 58, and when the armrest 20 is moved up and down with the index finger hooked on the finger hook 58, the index finger or the like is more likely to come off the finger hook 58. It is formed so that it can be prevented reliably. Then, the most protruding portion 59a of the finger hook 59 of the operation lever 54
The lower front end surface is an inclined surface 59b in which the amount of outward projection increases upward.

More specifically, the finger hook 58 of the operation lever 54 projects forward from the front opening 25A of the cover 25, and is formed so as to be able to be pressed from outside and to be released from the outside. Actuator 54B of operation lever 54
Is provided with an engaging projection (engaging pin 52).
Note that the above-described inclined surface 59b of the projection 59 has a curved surface shape that is convex upward.

Therefore, the finger hook 5 of the operation lever 54
When the lever 54 is turned by applying force to a finger (especially, the index finger) applied to the hook 8, the engaging pin 52 rotates clockwise (R2 direction) in FIG. Then, the engagement relationship with the engagement concave portion 51 is released. Thus, the armrest 20 is in a free state.

When the index finger is applied to the inclined surface 59b of the projection 59 of the operation lever 54, and the other finger is lightly touched (or non-contacted) with the corresponding finger hook 58, the hand is lifted. 54 is a return spring member 59 by a pushing force acting on the inclined surface 59b from the index finger.
Rotating clockwise (R2 direction) in FIG. 1 around the support shaft 57 against the elastic force of the SP, the engagement relationship between the engagement pin 52 and the engagement recess 51 is released.

At this time, the projection 59 prevents the index finger or the like from coming off the finger hook 58, so that the armrest 20
There is no situation in which the vehicle falls during the ascent.

Therefore, by merely lifting the hand (HD) with the index finger in contact with the inclined surface 59b of the projection 59, the locked state of the armrest 20 can be released and the operation can be smoothly shifted to the ascending operation.

Next, when the pressing of the operation lever 54 against the finger hook portion 58 is released, the operation lever 54 rotates counterclockwise (R1 direction) in FIG. 1 by the elastic force of the return spring member 59SP. As a result, the engaging projection (engaging pin 52) and the engaging recess 51 at the same height position engage with each other. Thereby, the armrest 20 is locked.

Next, the operation of this embodiment will be described. For example, when a person sitting on the seat portion (3) performs a rotation operation by putting a finger of a hand (HD) on a finger hook portion 58 of the operation lever 54 in order to adjust the height of the armrest 20, Since 54 is lower than the elbow of the above-mentioned person, the finger of the hand (HD) hangs on the finger hook 58 in a state of facing obliquely downward.

Here, since the lower end of the operation lever 54 is rotatably supported via the support shaft 57, the portion of the finger hook 58 of the operation lever 54 that is farthest from the support shaft 57. The index finger of the above-mentioned person hangs on 58a (the portion where the arm of the rotational moment is the longest).

Since the index finger is relatively long among the fingers of the hand (HD) and can be easily moved to the thumb side without being hindered by other fingers to easily set the angular position orthogonal to the finger hook 58, the above-mentioned portion is used. 58a can be reliably pressed strongly. At the same time, other portions of the finger hook 58 can be pressed by fingers other than the index finger.

As a result, a large rotational moment is applied to the operation lever 54, and the lever 54 can be rotated clockwise (R2 direction) in FIG.

Thus, when the operating lever 54 is rotated, the engaging pin 52 moves rightward in FIG. It is extracted. That is, the engagement relationship between the two (51, 52) is released, and the armrest 20 is free in the vertical direction (Z direction).

Next, in this state, the above-mentioned person lowers the armrest 20 with the finger of the hand (HD) placed on the operation lever 54 shown in FIG. 2 and applies the force applied to the finger at an appropriate position. When the operating lever 54 is loosened, the operating lever 54 rotates counterclockwise in FIG. 1 (R1 direction) by the elastic force of the return spring member 59SP, and as a result, the engaging pin 52 is engaged with the opposite engaging recess 51. As a result, the armrest 20 is positioned at a new position.

According to this embodiment, however, the operating portion is rotatably supported by the cover 25 at the lower end via the support shaft 57, and the finger hook 58 is provided above the lower end. Since the operation lever 54 is provided, when a person sitting on the seat portion (3) puts a finger of the hand (HD) on the finger-holding portion 58 of the operation lever 54, the index finger which can easily apply a large force is used. Finger hook 58 of operation lever 54
The portion 58a far from the support shaft portion 57 can be pressed, and the other portion of the finger hook portion 58 can be pressed simultaneously by each finger other than the index finger. Therefore, the turning operation can be easily performed by applying a large turning moment to the operation lever 54. Therefore, the height can be easily adjusted. In addition, since the operation lever 54 can be pivotally operated by effectively using each finger of the hand, the length of the lever 54 does not need to be particularly large, and the cover 25 of the armrest 20 can be used.
The portion can be prevented from becoming large.

Further, since the protrusion 59 is provided above the finger hook 58 of the operation lever 54, when the armrest 20 is moved up and down while the finger of the hand (HD) is hooked on the finger hook 58, the index finger or the like is used. Can be prevented from coming off the operation lever 54. Therefore, the height of the armrest 20 can be more reliably adjusted.

Further, since the front end face below the most protruding portion 59a of the projection 59 of the operation lever 54 is formed as the inclined surface 59b, the person sitting on the seat (3) can put the index finger on the inclined surface 59b of the projection 59. By simply lifting the hand (HD) with the arm resting on the armrest 20, the locked state of the armrest 20 can be released and the operation can be smoothly shifted to the ascent operation. Therefore, the height of the armrest 20 can be adjusted more easily and smoothly.

[0053]

According to the first aspect of the present invention, the operating portion has a lower end portion rotatably supported by the cover portion via the support shaft portion, and a finger hook portion is provided above the lower end portion. Since the control lever is formed of the operating lever, when the person sitting on the seat places his / her finger on the finger holder of the operating lever, the support shaft of the operating lever can be easily applied with a large force by using the index finger. The part far from the finger can be pressed, and the other part of the finger rest can also be pressed simultaneously with each finger other than the index finger. Therefore, a turning operation can be easily performed by applying a large turning moment to the operation lever. Therefore, the height of the armrest can be easily and reliably adjusted without increasing the size.

According to the second aspect of the present invention, since the projection is provided on the upper portion of the finger hook of the operation lever, the same effect as that of the first aspect of the invention can be obtained. Can be more reliably prevented from coming off the finger hook.

According to the third aspect of the present invention, since the front end surface below the most protruding portion of the projection of the operation lever is formed as the inclined surface, the hand is simply lifted with the index finger touching the inclined surface of the projection. Thus, the locked state of the armrest can be released and the operation can be smoothly shifted to the ascent operation. Therefore, claim 2
In addition to the effects similar to those of the invention, the armrest can be raised and adjusted more easily and smoothly.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining an embodiment of the present invention.

FIG. 2 is also a view for explaining a rotation operation of an operation lever.

FIG. 3 is a view for explaining a conventional configuration of a chair with armrests.

FIG. 4 is also a view for explaining a conventional height adjusting means.

FIG. 5 is a view for explaining a rotation operation of the operation lever.

[Explanation of symbols]

 Reference Signs List 3 seat portion 10 support member 20 armrest 20D body portion of armrest 25 cover 25A front opening 27 inner guide portion 28 middle support portion 50 height adjusting means 51 engagement recess 52 engagement pin (engagement protrusion) 54 operation lever (Operation part) 58 Finger hook part 59 Projection part 59a Most protruding part of projection part 59b Inclined surface of projection part 59SP Return spring member

Claims (3)

[Claims] An armrest is provided on each of the support members on both sides of the seat so as to be vertically adjustable through height adjustment means, and the height adjustment means is formed vertically separated from the support member. An operating portion including a plurality of engaging concave portions, an engaging convex portion provided on the armrest cover so as to be able to engage with and disengage with each of the engaging concave portions, and an operating portion connected to the engaging convex portion; In a chair with armrests formed such that the engaging projection moves and can be engaged with and disengaged from the engaging recess when a predetermined rotation operation is performed, the operating portion has a lower end portion supporting the shaft portion. A chair with armrests, comprising: an operating lever rotatably supported by the cover portion via a cover and having a finger hook portion provided above the lower end portion. 2. A chair with armrests according to claim 1, wherein a projection is provided above a finger hook of the operation lever. 3. An inclined surface in which an amount of outward projection increases as a front end face below a most protruding portion of the protrusion of the operation lever goes upward.
A chair with armrests as described.