JP3017919B2 - Chair armrest vertical position adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair armrest and, more particularly, to a chair armrest vertical position adjusting device capable of selecting a vertical position at a fine pitch.

[0002]

2. Description of the Related Art Conventionally used office chairs are designed so that the height of the chair can be adjusted up and down, and a seat and a backrest can be tilted at an appropriate angle so as to be able to cope with a desired posture of a seated person. Have been.

[0003]

However, the height of the armrest is conventionally constant for each chair. However, in practice, the height of the armrest depends on the height of the tall person, the low person, the man, the woman, and the contents of the work. However, there is a problem that the function of the armrest cannot be used effectively because the difference depends on the user. In addition, among the many chairs, there are some chairs in which the height of the armrests can be adjusted up and down by inserting pins into notches with multiple pitches, but in order to secure the strength of the engaging pins and the columns Since the pitch of the vertical movement must be relatively large, the height cannot be adjusted as desired, and the operability is poor.

SUMMARY OF THE INVENTION An object of the present invention is to provide an armrest vertical position adjusting device for a chair, which can adjust the vertical position at a fine pitch while ensuring the required strength, and aims to eliminate the drawbacks of the prior art. And

[0005]

In order to achieve the above object, according to the present invention, a seat and a backrest are provided on an upper portion of a leg, and armrests are provided on both sides of the seat via a support frame. A chair having a rack-shaped cut hole integrally connected to the support frame and having a predetermined interval in the vertical direction, and holding the upper and lower pins engaged with the hole to remove the pillar. A support that fits, a support that covers the support, and an armrest body that can move up and down with respect to the support integrally with the support, and that is inserted into the armrest and clamps the support from outside, A switch in which a torsion spring is attached to the pin portion, both ends of the torsion spring are brought into contact with the pin, and a spring resiliently interposed between the pin and the outer surface of the support is provided. Armrest can be moved up and down by pressing Characterized by being fixable at any position to.

Further, in the above structure, one of the upper and lower pins is always engaged with the rack-shaped cut hole so as to be positioned at a desired height.

According to a third aspect of the present invention, a seat is provided on an upper part of a leg,
And a chair having a backrest and armrests on both sides of the seat via a support frame, wherein the support column is integrally connected to the support frame and provided with rack-shaped cut holes at predetermined intervals in the vertical direction. A pin holder for holding a pin engaged with the cutout hole, and a column receiver externally fitted to the column, and covering the column receiver, and vertically moving with respect to the column integrally with the column receiver. A possible armrest body, a spring mounted on the strut receiver and constantly biased to contact the pin holder to engage the pin with the cutout, and protrude outward from the armrest body in connection with the pin holder. The armrest is moved up and down by rotation of the dial and can be fixed at an arbitrary position.

Further, in the configuration described in the preceding paragraph, the pins are composed of three pins arranged at an equal distance of 120 ° from the axis of the pin holder and arranged in parallel, and any two of them are always in the rack-like shape. Claim 4 relates to positioning at a desired height by engaging with the cut hole.

[0009]

According to the above construction, the height of the armrest can be freely adjusted at a fine pitch by pressing the switch. In the invention according to the third aspect, the height of the armrest can be adjusted by turning the dial. The height of the elbow can be set arbitrarily according to the physique of the person sitting because the height of the elbow can be adjusted freely.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings. FIG. 1 illustrates a chair 1 to which the present invention is applied. The chair 1 includes a seat 3 and a backrest 4 on the upper part of a leg 2 and armrests 6 on both sides of the seat 3 via support frames. is there. The armrest 20 according to the present invention is shown in FIG.
As shown in FIG. 4 to FIG. 4, there is a column 22 integrally connected to the upper part of the support frame 21, and a rack-shaped cutout 23a at a predetermined interval is provided in the vertical direction of the column 22. In addition, the upper and lower pins 2 that engage with the
A strut support 26 holding the 4 and 25 is provided so as to be fitted outside,
Further, the support 26 is provided with an armrest main body 27 that can move up and down with respect to the support 22 integrally with the support 26 so as to cover the support 22. A switch 28 is inserted into the armrest body 27 so as to sandwich the support 26 from the outside.
Is attached. The pins 24 and 25 come into contact with both ends of the torsion spring 29, and a coil spring 30 is interposed between the pins 24 and 25 and the outer surface of the column support 26.

More specifically, as shown in FIG. 5 in which parts are disassembled, a lower portion of a support column 22 is fixed to a support frame 21 with bolts 31 or the like as shown in FIGS. A hole 23 is provided in a vertical direction in a portion having a constant width from the upper portion to the middle portion. This hole 23 is provided with a semi-circular cutout 23 at a predetermined interval on one side thereof.
a and the protruding portions 22a partitioning between them are formed alternately, and the other side is formed linearly.

The column 22 has a notch 22b provided at the top.
And the projection 32a of the guide member 32 are engaged with each other.
The guide members 33 and 34 are attached so as to surround from both sides by engaging with a, and the guide member 34 is externally fitted to a portion below the hole 23. Further, between the upper and lower guide members 32, 33 and 34, the column support 26 is slidably fitted outside.

The strut support 26 is a square tube, and has a long side surface which penetrates the pins 24 and 25 up and down on the wider side surface.
5 and 35 are provided, and these pins 24 and 25
When entering the third cutout 23a, the position is fixed. A U-shaped switch 28 is inserted outside the support 26 via a coil spring 30 so as to be sandwiched therebetween.
8a, 28a are provided, and torsion springs 29, 29 are attached to the pin portion 28a.

The armrest main body 27 is a pair of right and left T-shaped 27
a, 27b, and covers the support 22, the support 26, and the switch 28 assembled as described above from outside (see FIGS. 2 and 4) so that the support 26 can slide following the vertical movement of the support 26. It has become. That is, the portions of the wings 26 a provided on the support 26 are engaged with the notches 36, 36 of the armrest main body 27 to be integrated. Then, the armrest body 27 is tightened from the left and right with bolts 37, and at this time, the U-shaped bottom surface of the switch 28 projects beyond the rear surface of the armrest body 27, and this portion pushes the armrest 20 up and down. Surface 38.

Next, the operation will be described.

As shown in FIG. 2, the pin 25 pressed by the torsion spring 29 enters the lower cutout 23a, and the pin 24 not pressed by the spring 29 stays on the convex portion 22a thereon. . By pressing the switch surface 38 by hand, the depth position of the pin portion 28a changes, so that the armrest main body 27 can move up and down with respect to the support column 22. When the hand is released, the pin portion 28a returns to the torsion spring 29. Pin 2 of the pressed one
Either one of 4 and 25 is engaged with the cutout 23a of the hole 23, and the position is fixed. Therefore, when adjusting the armrest up and down, pressing the switch surface 38 by hand causes the armrest main body 27 to move to the support 2.
2 can be moved up and down, and one of the pins 24 and 25 is engaged with one of the upper and lower cutouts 23a by releasing the hand. After the switch is released, the switch surface is released and the switch is fixed at that position, and can be moved up and down at a minute pitch.

FIG. 6 shows a hole 23 'according to another embodiment of the present invention. The difference from FIG. 2 is that the holes 23 shown in FIG. 2 are semicircular cut holes 23a at predetermined intervals and convex portions located between them. 22a and one side alternately formed, and the other side formed linearly, while the semicircular cutout 23a on one side is the same, but the end face of the convex portion 22a is Cut down the slope 22
c, and the straight portion on the other side has a cutout 23a on one side and a convex portion 22c.
Is formed into one arc shape having a length corresponding to
. are different from each other in that the b, 23b... face the open ends of the cutouts 23a, 23a.

Next, the operation state (including the case of FIG. 2) in the case of FIG. 6 will be described. First, FIG. 6A shows a case where the switch surface 38 is not pressed and the pin 24 (upper side) is turned off. The armrest 20 is locked in this position by engaging and locking the hole 23a. FIG. 6B shows the switch surface 3.
When the button 8 is pressed, the pin portion 28a of the switch 28 is also pushed inward, so that the pin 24 comes off from the cutout 23a and slides on the slope 22c, so that the pin 25 also moves and stops in the state of FIG. FIG. 6D shows a case in which the hand is released from the switch surface 38, and the pin 25 enters the cut hole 23a immediately below and is locked. Therefore, the height is lowered by one step as compared to before the pressing, and thus the height can be adjusted stepwise. Although FIG. 6 illustrates the case where the armrest 20 is lowered, when the armrest is raised, the switch surface is pushed in and raised.

Next, FIG. 7 to FIG.
This will be described with reference to FIG. The present invention also includes a seat 3 and a backrest 4 above the legs 2 of the chair shown in FIG. 1, and armrests on both sides of the seat 3 via support frames. That is, as shown in FIGS. 7 and 8, the armrest 40 of the present invention is provided with a column 41 integrally connected to an upper portion of a support frame (not shown). The support column 41 has rack-shaped cut holes 42 at predetermined intervals in the vertical direction.
a is provided. Further, the column 41 has a column receiver 43 fitted externally, and the column receiver 43
The pin holder 45 which holds the pin 44 engaged with a is held.

The armrest body 46 covers the support 43 and is provided so as to be able to move up and down integrally with the support 43 so as to sandwich the support 43 from both sides. Also, inside the armrest body 46, leaf springs 47, 47 for constantly contacting the pin holder 45 and holding the pin 44 in the cutout 42a are connected to one side of the pin holder 45,
A dial 48 protruding from the outside of the armrest body 46 is provided.

The pins 44 (44 ₁ , 44 ₂ , 44 ₃ )
Are pinched on both sides by a pair of pin holders 45, and are arranged at equal distances from the axis of the pin holder 45 at intervals of 120 ° and in parallel. Any two of them are arranged so as to always engage with the rack-shaped cutout 42a.

The structure of the present invention will be described in detail. The support column 41 has a predetermined thickness in the shape of a flat plate, and a hole 42 is provided in a vertical direction in a portion of a fixed width from the upper portion to the middle portion of the support column 41. I have. The hole 42 is formed with a semicircular cut hole 42a and a convex portion 41a partitioning the semicircular cut hole 42a alternately at one internal side, and is formed linearly on the other side.

The strut support 43 is a square tube, and elongated holes 49, 49 through which the three pins 44 can be penetrated are provided on both sides of the wider side in the vertical direction. When the column 41 enters the cutout 42a of the hole 42 of the column 41, its position is fixed, and the column receiver 43 can slide up and down with respect to the column 41 fitted inside. Also,
Protrusions 43a each having a mounting hole are fixedly provided on the upper, lower, left, and right sides of the column receiver 43, respectively.

The armrest body 46 has a pair of right and left T-shaped 46.
a, 46b, and in the vertical direction of the T-shape, there is provided a concave portion 50 for accommodating the column 41 housed in the column receiver 43 and capable of moving up and down.
a is provided with a screw seat 51 for the protruding piece 43a of the column receiver 43. As a result, the projecting piece 43a of the strut support 43 is formed.
Is aligned with one screw seat 51 of the armrest body 46a and tightened with screws 52 or the like.
6, the armrest body 46b on the other side is combined with the armrest body 46b, and tightened with a plurality of screws 54 or the like.
3 is in a state of being covered by the armrest body 46.

On one side of the pin holder 45, a dial 48 rotatable through a hole formed in the armrest body 46b.
The plug 53 for the back cover is attached to the other side so as to be in contact with the plug 53 for the back cover through a hole formed in the armrest body 46a, so that the position of the pin holder 45 is fixed. Further, a leaf spring 47 having a fixed base end is provided in a concave portion of the screw seat 51 of the armrest body 46a, and a tip of the leaf spring 47 is always in contact with the pin holder 45 and is engaged with the cutout 42a of the support column 41. It is biased in a direction to prevent it from getting out.

Next, the operation will be described.

As shown in FIG.
The pin 44 ₁ and 44 ₂ of the present is stopped at that position entering vertically the adjacent Setsuana 42a, armrest body 46 is fixed to its height. When the height of the armrest body 46 is made higher (or lower) than it is now, the dial 48 is rotated counterclockwise in FIG. pin 44 ₂ rotates about an axis is deviated from Setsuana 42a, a state depressing Setsuana 42a engaged only by the pin 44 _1, pin 44 ₃ by further rotation
Is engaged with the upper cutout 42a, so that the height of the armrest body 46 by one pitch with respect to the support 41 is increased. In this manner, during adjustment, one of the two pins engaged with the cut hole 42a is disengaged, and while the other pin is engaged, the third pin is rotated into the adjacent cut hole by rotation. Since the two pins are engaged at the time of the engagement and the completion of the adjustment, no problem such as the disengagement occurs at all.

By repeating this, the armrest body 46 can be raised to a desired height. In addition, in the case of lowering, the operation can be adjusted by performing the reverse operation. Therefore, any two of the three pins are
By engaging with 2a, it can be fixed at any position,
Fine adjustment is possible by reducing the pitch of the cut holes.

[0029]

Since the present invention is configured as described above, it has the following effects.

According to the first aspect of the present invention, when the armrest is moved up and down, the pins engaged between the teeth of the rack are pushed in and the positions of the upper and lower two pins are changed by pushing the switch, so that the up and down movement with respect to the column is free, The desired height can be adjusted by releasing the switch at the desired height.

Further, according to the third and fourth aspects of the present invention, since two of the three pins are always engaged, the height can be easily changed by turning the dial.

In addition, each of the inventions can be moved up and down at a fine pitch, and the strength can be secured. Therefore, an excellent effect is obtained in which the height of the armrest can be easily adjusted to the optimum height according to the preference of the person using the chair.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of a chair to which an armrest vertical position adjusting device of a chair according to the present invention is attached, wherein (a) shows a state in which the armrest is lowered, and (b) shows respective side views in a state where the armrest is raised.

FIG. 2 is a side view showing one embodiment of the armrest up-and-down position adjusting device according to the first embodiment of the present invention;

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a sectional view taken along line AA of FIG. 2;

FIG. 5 is an exploded perspective view of the parts shown in FIG. 2;

FIGS. 6A and 6B show the operation sequence of another embodiment of the vertical position adjusting portion according to the first aspect of the present invention, wherein FIG. 6A is a non-operation state diagram of the switch, and FIGS. , (D)
FIG. 3 is a diagram showing the completion of switch operation.

FIG. 7 is an exploded perspective view showing one embodiment of the armrest vertical position adjusting device for a chair according to the invention of claim 3;

FIG. 8 is a side view of FIG. 7;

FIG. 9 is a sectional view taken along line BB of FIG. 8;

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 chair 2 legs 3 seat 4 backrest 6 armrest 20 armrest 21 support frame 22 support 23, 23 ′ hole 23 a cutout 24, 25 pin 26 support post 27 armrest main body 28 switch 28 a pin 29 torsion spring 30 coil spring 40 armrest 41 support 42 hole 42a cut hole 43 prop receiver 44 pin 45 pin holder 46 armrest body 47 leaf spring 48 dial

Claims (4)

(57) [Claims] 1. A chair comprising a seat and a backrest on the upper part of a leg, and armrests on both sides of the seat via a support frame, wherein the chair is integrally connected to the support frame.
And a column provided with rack-shaped cut holes at predetermined intervals in the vertical direction, a column receiver that holds upper and lower pins engaged with the cut holes, and a column receiver that is externally fitted to the column, and covers the column receiver. An armrest body that can move up and down with respect to the strut integrally with the strut receiver,
Inserted into this armrest body, and sandwiching the column support from the outside, attaching a spring to the pin portion at the tip to contact both ends of the spring with the pin, and between the outer surface of the column receiver. A switch interposed by a resilient spring, the armrest can be moved up and down by pressing the switch, and one of the upper and lower pins can be released by releasing the switch.
An armrest vertical position adjusting device for a chair, wherein the armrests can be fixed at an arbitrary position by engaging with the notch . 2. An armrest vertical position of the chair according to claim 1, wherein the one of the upper and lower pin is positioned at the desired height engage always the rack-like Setsuana Adjustment device. 3. A chair provided with a seat and a backrest on the upper part of a leg, and armrests on both sides of the seat via a support frame, wherein the chair is integrally connected to the support frame,
A column provided with rack-shaped cut holes at predetermined intervals in a vertical direction; a pin holder for holding a pin holder in which a pin engaging with the cut hole is sandwiched; and a column receiver externally fitted to the column, An armrest body that can move up and down with respect to the column integrally with the column receiver, and a spring mounted on the column receiver and constantly biased to contact the pin holder to engage the pin with the cutout. And a dial connected to the pin holder and protruding from the outside of the armrest body, wherein the armrest can be moved up and down by rotation of the dial and fixed at an arbitrary position. Vertical position adjustment device. 4. The pin is at 120 ° from the axis of the pin holder.
It is composed of three parallel and equidistant,
4. The armrest up-and-down position adjusting device for a chair according to claim 3 , wherein any two of them are always engaged with the rack-shaped cutout and positioned at a desired height.