JPH07204059A - Legless chair - Google Patents

Abstract

PURPOSE:To provide a legless chair with less installation space and a good appearance, which gives a user a comfort in any sitting posture such as cross- legged sitting, square sitting, etc., reduces the load on user's legs and waist especially in square sitting posture, and allows the user to sit straight easily. CONSTITUTION:A square-sitting hip rest 12 fitted in a recessed hip rest housing 11a of a seat main body 11 can be freely moved up and down between and kept stationary at two positions by a hip rest lifting mechanism: a retracted position where the hip rest 12 is fitted in the recessed housing 11a and its upside becomes almost an equal level with the upside of the seat main body 11 and a service position where the hip rest 12 is projected up from the recessed housing 11a and positioned above the upside of the seat main body 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat chair that can be seated in either a cross or a sitting position.

[0002]

2. Description of the Related Art In recent years, many sitting chairs have been proposed which can provide a comfortable sitting comfort in any of the postures such as cross-legged sitting and straight sitting, and can significantly reduce the load on the legs and waist in the sitting posture. . For example, in the seat chairs disclosed in Japanese Utility Model Publication Nos. 3-32283 and 3-32284, the seat plate is configured to be able to move up and down. The seat is placed so that the buttocks are placed on the seat plate, and when the sitting position is taken, the seat plate is placed at a high position and the lower leg is inserted between the seat plate and the installation surface. Then, the buttocks are placed on the upper surface of the seat plate and the weight is supported by the seat plate to be seated.

On the other hand, as another type of seat chair, there has been proposed, for example, one in which a support is provided on a seat plate so that it can be raised and lowered, and a buttocks are attached to the tip of the support. If you want to take a cross-legged position, this chair should be laid down so that the buttocks rest on the back of the seat, with the struts lying down, and the buttocks set on the seat. In this case, the stanchion is erected, the buttocks are arranged above the seat plate, and the buttocks are seated so that the buttocks are placed on the buttocks.

[0004]

However, in the former seat chair, since the whole seat plate is configured to be able to move up and down, when the user sits down straight, the lower leg is troublesomely inserted and arranged on the lower surface side of the seat plate. There is a problem that it is difficult to take a sitting posture.

Further, in the latter seat chair, since the column having the buttocks is attached to the tip of the chair so that it can be raised and lowered, the buttocks are projected to the rear of the seat plate when the columns are laid down. Since they are arranged, the appearance is impaired and the installation space becomes large.

The present invention has been made in view of the above circumstances. A comfortable sitting comfort can be obtained in any sitting posture such as cross-legged seat and sitting posture, and the sitting posture can be easily achieved. The purpose is to provide a chair with a small installation space and a good aesthetics.

[0007]

In order to achieve the above-mentioned object, a seat chair according to the present invention has a seat portion, a seat portion main body having a buttocks receiving matching concave portion formed in the center of the upper surface side, and the buttocks receiving matching concave portion. It is composed of a buttocks for normal seat that fits inside, and the buttocks are arranged so that the buttocks receiving / lowering mechanism fits the buttocks receiving matching recesses so that the buttocks receiving upper surface is substantially flush with the seat body upper surface. It is movable up and down between a position where it is arranged and a position where it is pulled out upward from the buttocks receiving compatible concave portion and the buttocks receiving upper surface is arranged above the seat body main body upper surface, and can be fixed at these two positions respectively. The gist is to be supported by.

In the present invention, it is preferable to adopt a structure in which the buttock receiver is fixedly supported by the buttock receiver lifting mechanism at three or more lifting positions including the two positions.

[0009]

In the seat chair according to the present invention, the butt rest for the right seat, which fits into the butt rest-accommodating concave portion of the seat main body, is fitted to the buttock-receiving conforming concave portion by the buttock receiving and elevating mechanism, and more than the seat main body. It is supported so as to be able to move up and down between it and a position where it rises and to be fixed at each of these two positions. For this reason, when taking the cross-legged posture, the buttocks are fitted into the recesses, the buttocks receiving upper surface is arranged substantially flush with the seat body upper surface to form a seating surface, and the buttocks are formed on the seating surface. By sitting down, you can comfortably cross a wide seating surface consisting of the upper part of the buttocks and the upper part of the seat body, and when you take a normal sitting posture, the buttocks stand higher than the seat body. By fixing it to the position and placing the buttocks on the buttocks while keeping the lower leg along the upper surface of the seat body, the weight of the seated person is supported by the buttocks and the burden on the legs and waist is reduced. It will be. In addition, since only the buttocks in the center of the seat are raised and lowered, when the user sits upright, the lower leg may be placed on the seat body,
Unlike the conventional case, it is not necessary to insert almost all of the lower leg part into the lower surface side of the seat part, which is troublesome. Further, by fitting the buttocks to the buttocks-accommodating recesses of the seat body, the seat body and the buttocks form a simple seat.

Further, in the present invention, in the case where the buttock receiver is fixedly supported at three or more lifting positions by the buttock lifting mechanism, it can be adjusted according to the physique and preference of the user. The height of the buttocks can be appropriately selected.

[0011]

1 is a perspective view showing a seat chair according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a frame portion of the seat chair. As shown in both figures, this chair has a seat (1).
And a backrest (2). The seat (1) is
From the center on the upper surface side to the rear end,
The seat body (11) is formed with a) and the buttocks support (12) for a normal seat that fits into the buttocks reception compatible recess (11a).

The seat body (11) and the backrest (2) are formed by covering the seat frame (15) and the backrest frame (25) with a cushion material or the like, and the seat frame (15). On the rear end of both sides of
By connecting both end portions of the backrest frame (25) via the ratchet mechanism (3) (3), the backrest portion (2) is configured to be able to move up and down with respect to the seat body (11). The backrest (2) is configured to be held in an arbitrary tilted posture. Also, the buttocks (12)
For example, it is formed by covering the core material with a cushion material or the like.

As shown in FIGS. 3 and 4, the buttock receiving and elevating mechanism (4) arranged in the buttock-receiving-compatible recess (11a) has a substrate (5), an outer arm (6), and an inner arm (). 7)
It has and. A shaft support portion (51) is formed on the front end side of the substrate (5), and both side regions from the central portion to the rear end portion are bent upward to form a bent piece (52).
(52) is formed. Each bent piece (52) (52)
The shaft engaging holes (5
3) (53) is formed so as to correspond between the bent pieces (52) (52) on both sides, and the shaft engaging holes (53) (5) are formed.
3) On the lower side, as shown in FIG. 5, a plurality of arcuate shaft engaging portions (53a) to (53d) are provided on both side bent pieces (52).
It is formed so as to correspond between (52).

The outer arm (6) is in the shape of a rectangular frame, and has both side pieces (61) (61) and both side pieces (61) (6).
1) has a rotating shaft (62) and a connecting piece (63) provided so as to be bridged between the respective ends. Then, the rotation shaft (62) is rotatably attached to the shaft support portion (51) of the substrate (5).

Further, the inner arm (7) is also connected to the outer arm (6).
Similar to the above, it has a rectangular frame shape, and both side pieces (71) (7
1), and an engaging shaft (72) and a rotating shaft (73) which are provided so as to be bridged between the respective end portions of the both side pieces (71) (71). And the engaging shaft (72)
Is inserted and arranged in both shaft engaging holes (53) (53) of the substrate (5), the outer side of the central portion of the both side pieces (71) (71) is located at the both side pieces (61) () of the outer arm (6). It is rotatably attached inside the central part of 61).

The substrate (5) of the buttock receiving and lifting mechanism (4) having such a structure is fixed to the central piece (15a) of the seat frame (15) shown in FIG. 2 by screwing, and further the inner arm (7). The rotary shaft (73) of the above is rotatably attached to the lower surface side of the buttocks receiver (12), and the connecting piece (63) of the outer arm (6) is attached to the lower surface side of the buttocks receiver (12) in the seat back and forth direction. It is attached slidably along. As a result, as shown in FIG. 4, the engagement shaft (7) of the inner arm (7) is
In the state in which 2) is engaged with the shaft engagement portion (53a) of the first stage, both arms (6) and (7) lie down so as to overlap with the substrate (5), and the buttocks are received (12). Seat body (11)
1b fitted into the fitting recess (11a) of the buttock (12) and the seat body (1) as shown in FIG. 1 (b).
The upper surface of 1) will be arrange | positioned on substantially the same surface.

From this state, the buttock receiver (12) is attached to the front end of the buttock receiver (12) and is pulled up by pulling the string (8) for raising and lowering the buttock receiver by lifting it with a finger. When going, the engagement shaft (72) of the inner arm (7)
Disengage from the shaft engaging portion (53a) upward and are disengaged, and the engaging shaft (72) moves forward along the upper portions of the shaft engaging holes (53) (53) to move both arms ( 6) (7) stands up. Furthermore, when the above-mentioned lifting operation is released when the buttocks (12) have reached the desired height position, the engagement shaft (72) of the inner arm (7) moves to the second position as shown in FIG.
Stage to fourth stage shaft engaging portions (53b) to (53d)
Among them, it falls down and engages with an appropriate shaft engaging portion, both arms (6) and (7) are held in an inclined posture, and the buttocks receiving portion (12) is held.
Is fixed with its upper surface arranged above the upper surface of the seat body (11). In this case, the engagement position of the engagement shaft (72) of the inner arm (7) is changed to the second, third, and fourth stage shaft engagement portions (53b) (53c) (53d). As a result, the fixed position of the buttocks (12) gradually increases.

On the other hand, when the buttock receiver (12) is pulled a little forward from this state and then lowered and lowered, the engagement shaft (72) of the inner arm (7) causes the shaft engagement portions (53b) to (53).
d) is disengaged and disengaged, and the engaging shaft (72)
Moves rearward along the upper portions of the shaft engaging holes (53) (53), the arms (6) (7) fall down, and further, as shown in FIG. The mating shaft (72) falls into and engages with the shaft engaging portion (53a), and the buttocks (12) are fitted in the buttocks receiving fitting recesses (11a).

In this seat chair, for example, when the user sits with his legs extended, or when he sits with his legs crossed so as to cross the cross, as shown in FIG. 1 (b) and FIG. Fit the buttocks (12) to the buttocks compatible recess (11a)
The inside of the buttocks (12) with the upper surface of the seat body (1
By arranging them on the same plane with respect to the upper surface of 1) and seating them so that the buttocks are placed on the seating surface composed of that surface, it is possible to comfortably cross the cross on a wide seating surface composed of the buttocks receiving upper surface and the seat body upper surface. When the person sits up and sits upright, the buttocks (12) are fixed at an appropriate height, and the lower legs are placed along the seat body (11) while the buttocks (1
By sitting with the buttocks on 2), the weight of the seated person is supported by the buttocks (12), and the load on the legs and waist is reduced. Therefore, a comfortable sitting comfort can be obtained in any sitting posture such as cross-legged and sitting.

Further, since only the buttocks (12) at the center of the seat part is moved up and down, the lower leg may be placed on the seat body (11) when performing a right seat, as in the conventional example. In addition, it is not necessary to insert the lower leg portion into the lower surface side of the seat portion even if it is troublesome, and it is possible to easily take a normal sitting posture.

Further, in the case where the sitting position is not maintained, the buttocks (12) are fitted into the buttocks receiving matching recesses (11a) of the buttocks main body (11), whereby the buttocks main body (11). ) And the buttocks (12) form a simple rectangular seat (1), so that the buttocks are not arranged rearward as in the conventional case, and the installation space is reduced. , You can also get a good aesthetic.

Further, four shaft engaging portions (53a) to (53d) are formed in the shaft engaging hole (53), and the buttocks (1) are received.
Since the height of 2) can be adjusted in 4 steps, the buttocks (12) can be adjusted according to the physique and preference of the user.
The height of the seat can be appropriately selected, and a more comfortable sitting comfort can be obtained.

Further, in the present embodiment, since the string (8) for lifting and lowering the buttocks is attached to the front end of the buttocks (12), the buttocks (12) are used by using the string (8). The lifting operation of the buttocks (12) can be easily performed by performing the lifting operation of the, the disengagement operation of the engagement shaft (72) of the inner arm (7), and the like.

In the above embodiment, the buttocks (1
The height of 2) is configured to be adjustable in four steps, but in the present invention, the height of the buttocks (12) is configured to be adjustable in two steps, three steps, or five steps or more. You may.

[0025]

As described above, according to the seat chair of the present invention, the sitting buttock receiver that fits the buttock-receiving fit recess of the seat body fits in the buttock-receiving fit recess by the buttock-receiving lifting mechanism. Since it is supported so that it can be raised and lowered between a position and a position that is higher than the seat body, and can be fixed at each of these two positions, when taking a crossed posture,
By adapting the buttocks to the recesses and arranging the buttocks upper surface almost flush with the upper surface of the seat body to form a seat surface, and seating so that the buttocks are placed on the seat surface, a wide seat surface is obtained. In addition to being able to comfortably cross the upper part of the seat, when taking a sitting posture, fix the buttocks at a position higher than the seat body, and place the buttocks while keeping the lower legs along the top of the seat body. By sitting with the buttocks on the back, the weight of the seated person is supported by the buttocks and the load on the legs and waist is reduced. Therefore, a comfortable sitting comfort can be obtained in any sitting posture such as cross-legged and sitting. In addition, since only the buttocks in the center of the seat are raised and lowered, the leg can be placed on the main body of the seat when sitting in a sitting position. There is no need to insert and arrange it on the lower surface side of, and the sitting position can be easily taken. Also, by adapting the buttocks to the buttocks-accommodating recesses of the seat body, a simple seat is formed by the seat body and buttocks, so the installation space can be reduced and good aesthetics can be obtained. There is an effect that can be.

In the present invention, when the buttock receiver is fixedly supported at three or more lift positions by the buttock lift mechanism, it can be adjusted according to the physique and preference of the user. The height of the buttocks can be appropriately selected, and there is an advantage that a more comfortable sitting comfort can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing a seat chair according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a frame portion of the seat chair according to the embodiment.

FIG. 3 is a perspective view showing a buttocks receiving and elevating mechanism of the seat chair according to the embodiment.

FIG. 4 is a perspective view showing a buttocks receiving and elevating mechanism of the seat according to the embodiment.

FIG. 5 is a side cross-sectional view showing a substrate of a buttocks receiving and elevating mechanism of the seat according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Seat part 4 ... Buttocks receiving and elevating mechanism 11 ... Seat part main body 11a ... Buttocks receiving conforming recessed part 12 ... Buttocks receiver

Claims (2)

[Claims] 1. The seat portion includes a seat portion main body having a buttocks receiving-compatible recess formed in the center of the upper surface and a seat for buttocks that fits within the buttocks receiving-compatible recess, and the buttocks receiving member is provided. A position where the buttocks receiving / lowering mechanism is fitted to the buttocks receiving conforming concave portion so that the buttocks receiving upper surface is arranged substantially on the same plane as the seat body upper surface, and a position where the buttocks receiving conforming concave portion is upwardly pulled out and goes up. Is movable up and down between a position where the upper part of the seat body is arranged above
A seat chair characterized in that it is fixedly supported in each of two positions. 2. The seat chair according to claim 1, wherein the buttocks are fixedly supported by the buttocks lifting mechanism in three or more lifting positions including the two positions.