JP2002119368A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair which has a backrest part so as not to obstruct motion of user's elbows. SOLUTION: This chair 1 is equipped with a stretched member 9 on a backrest frame 5 arranged aback the sitting frame 4. A longitudinal frame part 56 of the backrest upper frame 55 is arranged further inside the side edges of the stretched member 9. The stretched member 9 is supported by the backrest upper frame 55 and the backrest lower frame 50. Thus the side edge parts of the stretch member 9 can be freely moved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair structure, and more particularly, to a chair structure that allows a seated person to freely move his or her elbow.

[0002]

2. Description of the Related Art At present, chairs used in offices and the like are provided with cushions and outer shells made of synthetic resin on the front and back surfaces, and a backing member made of cloth or the like. There is a device which is attached to a frame body of the vehicle so as to improve air permeability in a backrest portion.

[0003] In recent years, chairs tend to have a body contact surface as large as possible so as to reduce the fatigue of a seated person during long-time work. The backrest portion is provided in a wide range from around the shoulder of the seated person.

[0004]

However, if a large backrest is secured in this way, the elbow portion of the seated person will hit a frame fixed to the outer shell or the like or a frame-like frame attached with a tension member. Therefore, for example, in the case of performing a look-back operation to take luggage behind the seat, or in the case of performing a refresh operation with the arms spread downward, there is a problem that the movement of the elbow is restricted. I was

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a chair having a backrest portion so as not to disturb the movement of the elbow of the occupant. .

[0006]

That is, in order to solve the above-mentioned problems, a chair according to the present invention comprises a chair provided with an upholstery member on a backrest provided behind a seating portion. A backrest frame is provided inside the edge, and the tension member is supported at the upper end side and the lower end side of the backrest frame.

As described above, since the backrest frame is provided inside the side edge of the tension member, the side edge of the tension member is not restrained by the outer shell or the like, whereby the movement of the elbow of the occupant is free. Can be made. As a method of providing the backrest frame inside the tension member, a method of providing a backrest frame adjacent to the back surface of the tension member, a method of providing a backrest frame away from the back surface of the tension member, and the like are conceivable.

In this case, as in the latter case, if the backrest frame is provided so as to have a space for allowing the tension member to bend, a large allowable range for the movement of the elbow of the occupant can be secured. Further, the cushioning property due to the bending of the tension member can be secured at the same time.

When a backrest frame is provided inside the side edge of the upholstery member, one backrest frame may be provided on the back surface of the upholstery member. More preferably, a plurality of backrest frames are provided. Are preferably provided in parallel. In the case of such a configuration, it is possible to prevent torsion based on the backrest operation, and to stabilize the backrest portion.

When the tension member is attached as described above, it is necessary to attach the tension member to the upper portion of the backrest. When attaching the tension member in this way, one horizontal frame may be provided at the upper end of the backrest frame, and the tension member may be attached to this horizontal frame.
More preferably, the distal end side of the backrest frame is formed in a loop shape, and a tension member is attached to a portion formed in the loop shape. In the case of such a configuration, the sharp portion of the end of the frame is not exposed as compared with the case where one horizontal frame is provided and the tension member is attached, and in particular, the frame extends over a plurality of backrest frames. When such a loop shape is provided, the strength can be maintained by preventing the backrest frame from being twisted or the like.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a main part of a chair 1 according to an embodiment of the present invention.
Is a diagram showing the back of the chair 1. FIG.

This chair 1 is provided with a support 3 attached to a base leg 2, a link 6 and a link 7 attached to the support 3, and a seat attached to the link 6 and the link 7. Seating frame 4 that constitutes the part
And a backrest frame 5 provided behind the seating frame 4. In addition, a cushion 41 and the like are appropriately attached in addition to the above, but in the present embodiment, the cushion 41 is omitted and described.

The support base 3 is made of an inverted triangular aluminum member. The lower side of the support base 3 is attached to the base leg 2 and the link 6 is attached to the tip of the base leg 2 via a shaft 61. is there. The link 6 is made to move while rotating by the shafts 40 and 61 on both front sides of the seating frame 4. The shaft 40 provided at the upper end of the link 6 has the support base 3 and A gas spring 90 is provided therebetween, and by operating a lever (not shown), the gas spring 90 is switched between a fixed state and a free state so that the inclination of the backrest frame 5 can be changed. A torsion bar 72 is provided at a substantially central portion of the support base 3, and one end of the link 7 is fixed to a shaft 71 extending in the extension direction. The link 7 is formed of a metal member extending obliquely rearward from the shaft 71, and the other end of the link 7 is rotatably attached to a frame portion provided at the rear of the seating frame 4. It is. The link 7 is configured to rotate the shaft 8 side of the link 7 toward the front side (B side) of the chair 1 by the elastic force of the torsion bar 72.

A gas spring 91 is attached to the upper back surface of the link 7 between the link 7 and the upper frame 55 of the backrest, and the upper frame 55 is constantly pressed forward (side B) by the gas force. I am trying to do it. In addition, a mechanism (not shown) for sandwiching and fixing the shaft of the gas spring 91 is provided near the gas spring 91 so that the gas spring 91 can be switched between a free state and a fixed state. ing.

A lower backrest frame 50 is rotatably mounted on the inside of the upper backrest frame 55 attached via the shaft 8 via a shaft 70 provided on the link 7. The lower backrest frame 50 includes an ischial frame 51 extending substantially in the direction in which the link 7 extends, a connecting portion 53 provided at an upper portion of the ischial frame 51, and a bone supporting frame 51 from both ends of the connecting portion 53. And a lumbar support frame 52 extending substantially perpendicularly upward. This connecting part 5
3 is wider than the interval between the left and right upper back frames 55, and furthermore, elastic pieces 93d can be attached to the lumbar support frame 52 and the connecting portion 53. The elastic piece 93d is formed in a substantially U-shape that opens upward by a thin synthetic resin. The elastic piece 93d is attached to the connecting portion 53 and the lower end portion of the lumbar support frame 52. The end side can be bent on the curved portion 52a of the lumbar support frame 52. In addition, a gas spring 92 is attached to the connecting portion 53 between the connecting portion 53 and the seat frame 4. By changing the length of the shaft of the gas spring 92, the gas spring 92 is rotated around the lower end portion of the lower frame 50, The lumbar and ischial portions of the seated person can be pressed.

The backrest upper frame 55 is provided to be exposed on the back side of the chair 1, passes under the connecting portion 53 from the shaft 8, bends behind the connecting portion 53, and forms the two lower backrest frames 50. The vertical frame portion 56 is configured to extend to the upper part near the elbow of the seating portion through the rear portion therebetween. Also, on the upper side of the vertical frame portion 56,
A connecting portion 55d for connecting the left and right frames is provided,
The shoulder vertical frame portion 57 is provided by bending the frames forward from the portion of the connecting portion 55d so as to spread each other, and the connecting portion 55u is provided at the upper end thereof, so that the upper backrest frame 55 is configured as a whole. I have to. As described above, by providing the loop-shaped shoulder support portion including the connecting portions 55d and 55u and the left and right shoulder vertical frame portions 57 above the left and right vertical frame portions 56, the backrest upper frame 55 is prevented from being twisted. The strength of the connecting portion 5 can be maintained by exposing the upper frame 55 of the backrest.
A hand is placed near 5d so that the chair 1 can be easily carried. Further, a thin plate-like elastic piece 93u is attached to the connecting portion 55u so as to oppose the elastic piece 93d provided on the lower frame 50 of the backrest, and the free end side of the elastic piece 93u is connected to the opposing elastic piece. It overlaps on the free end of 93d.

The elastic pieces 93u and 93d are provided with an upholstery member 9 so as to wrap the upper portion or the elastic pieces 93u and 93d, and the elastic member 93 does not restrict the movement of the elbow of the occupant. It constitutes a contact surface. That is, the tension member 9 has its lower end attached to the connecting portion 53 together with the elastic piece 93d, and also has its upper end connected to the backrest upper frame 55 which can be selectively rotated by the shaft 71 or 8. The elastic piece 93u is attached to the portion 55u. This allows the left and right side edges near the elbow to be freely bent toward the space S formed between the tension member 9 and the upper backrest frame 55.

Next, the use state of the chair 1 configured as described above will be described with reference to FIGS.

When the occupant sits on the chair 1 configured as described above and leans on the tension member 9, the tension member 9
It is deformed so as to bend together with 3u and 93d. When the backrest portion of the chair 1 is tilted backward, that is, when the gas spring 90 is in a free state, the gas spring 91 is fixed, and the entire backrest frame 5 is tilted backward integrally with the link 7 (FIG. 3) Also, in the case where the gas spring 90 is fixed and the gas spring 91 is in the free state and only the backrest upper frame 55 is tilted rearward about the shaft 8 (FIG. 4), the tension member 9 The bending of the elastic pieces 93u and 93d is allowed. Then, in such a state, when the occupant extends the arm backward and refreshes in such a state, the tension member 9 and the elastic pieces 93u, 93 which come into contact with the occupant's elbow portion.
d is deformed to allow the movement of the elbow based on the refresh operation of the seated person. Not only the refreshing operation, but also in the case where the occupant performs an operation of turning back to the back of the chair 1 and taking a luggage or the like, similarly, the tension member 9 or the elastic member that contacts the occupant's elbow portion. The pieces 93u and 93d can be deformed.

As described above, according to the embodiment of the present invention, in the chair 1 in which the backrest frame 5 provided behind the seating frame 4 is provided with the upholstery member 9, The vertical frame portion 56 of the backrest upper frame 55 is provided on the inside, and the tension member 9 is supported by the backrest upper frame 55 and the backrest lower frame 50, so that the side edge of the backrest portion has an outer shell as in the conventional case. And the elbow of the occupant can be freely moved.

Further, since the chair 1 is provided with the upper frame 55 of the backrest so as to have the space S for allowing the tension member 9 to bend, a large allowable range for the movement of the elbow of the seated person is secured. Further, the cushioning property due to the bending of the tension member 9 can be secured at the same time.

Further, as the backrest upper frame 55 to which the tension member 9 is attached, the backrest upper frame 55 is constituted by two frames,
Since a loop-shaped portion is formed by the connecting portions 55u and 55d at the upper part, it is possible to prevent the seat back from being twisted with respect to the upper frame 55 while supporting the vicinity of the shoulder of the seated person.

In the above embodiment, various modifications can be made without departing from the spirit of the present invention.

For example, in this embodiment, two vertical frame portions 56 are provided as the upper frame 55 for the backrest. However, this may be constituted by one vertical frame. The space portion S is provided between the vertical frame portion 56, but the present invention is not limited to this, and a cushion member or the like is sandwiched between the vertical frame portion to improve the feeling of back contact and allow the seated person to move with respect to the elbow. You may do it.

[0025]

The present invention is embodied in the form described above and has the following effects.

That is, in the chair according to the present invention, in a chair having a backrest provided behind a seating portion provided with a tension member, a backrest frame is provided inside a side edge of the tension member, and the backrest frame is provided. Because the upper end side and lower end side support the tension member,
The degree of freedom of movement of the seated person's elbow can be provided.

Further, since a space is provided between the backrest frame and the tension member for allowing the tension member to bend, the permissible range for the movement of the seated person's elbow can be increased. .

Further, in this invention, since a plurality of backrest frames are provided, it is possible to prevent torsion or the like due to the backrest operation and to stabilize the backrest portion.

Further, in this invention, since the upper end side of the backrest frame is formed in a loop shape and the tension member is attached to the loop-shaped portion, the sharp end of the frame end can be exposed. Gone
In particular, when such a loop shape is provided across a plurality of backrest frames, it is possible to prevent torsion between the backrest frames and the like.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a chair showing an embodiment of the present invention.

FIG. 2 is a rear view of the chair showing the embodiment.

FIG. 3 is a side view showing a use state in the embodiment.

FIG. 4 is a side view showing a use state in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Chair 4 ... Seated part (seat frame) 5 ... Back part (back frame) 50 ... Back part (back part lower frame) 55 ... Back part (back part upper frame) 56 ...・ Back part (vertical frame part) 55u, 55d ... Back part (connecting part) 57 ... Back part (shoulder vertical frame part) S ... Space part

Continued on the front page (72) Inventor Fritz Frenkler Germany 60594 Frankfurt am Main Schweizerstrasse 7 FP Design Gae Mbeher (72) Inventor Annette Ponholzer Germany 60594 Frankfurt am Main Schweizerstrasse 7 FP Design GAMEBEHER F-term (reference) 3B084 GA01 3B091 AA01 AB04 AC07 AD02 3B099 AA02 BA09 CA35 CA36

Claims (4)

[Claims] A chair provided with an upholstery member at a backrest provided behind a seating portion, wherein a backrest frame is provided inside a side edge of the upholstery member;
A chair, wherein the tension member is supported at the upper end and the lower end of the backrest frame. 2. The chair according to claim 1, wherein a space is provided between the backrest frame and the tension member to allow the tension member to bend. 3. The chair according to claim 1, wherein a plurality of the backrest frames are provided. 4. The chair according to claim 1, wherein an upper end side of the backrest frame is formed in a loop shape, and the tension member is attached to the loop shape portion.