JPH06141945A - Legless chair - Google Patents

Abstract

PURPOSE:To provide a legless chair which gives less burden on the lower limbs in the sitting-down state of sitting straight or sitting cross-legged and on which a person can sit down with the posture of his spinal column being extended. CONSTITUTION:In this legless chair consisting of a seat portion 1 and a back rest portion 2, an auxiliary seat plate 4 big enough to be able to mount a hip portion is provided at the rear center portion of the seat portion 1, and the auxiliary seat plate 4 is made ascendable/descendable by means of the ascent/ descent portion 10 of an ascent/descent mechanism 9 provided low at a lateral center portion in the front view, and at the time of descent, the main seat surface 7 of the seat portion 1 becomes flush with the seat surface 13 of the auxiliary seat plate 4, and at the time of ascent, a space 12 that can house the lower limbs is formed between the main seat surface 7 and the lower surface of the auxiliary seat plate 4 and on both side portions of the ascent/descent portion 10. An auxiliary back rest plate 5 turningly openable/closable with the lower end as a center is provided at an opening portion 15 formed at the lower end of the back rest portion 2, and when the auxiliary back rest plate 5 is opened backward, the tips of the toes that are through the opening portion 15 are made mountable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low-seat chair to be used on a carpet or tatami mat, and more specifically, it reduces the load on the lower limbs when sitting in a sitting or sitting position. , Relates to a chair that allows the user to sit in a posture where the back muscles are stretched.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Utility Model Publication No. 59-42936, a recess is formed in a rear part of a seat cushion main body, and a seat is provided in the recess so that the seat can be stored and the legs can be folded. There is provided a seat cushion with a seat for sitting, in which the seat can be set above the seat surface of the main body of the seat cushion. It is also disclosed that even when sitting on the cross, it is stable and does not hurt the numbness or ankles of the foot.

On the other hand, as disclosed in Japanese Utility Model Publication No. 57-12934, an opening is formed at the lower end of the seat back (backrest part), and the lower end is connected by a four-bar linkage mechanism. The foot rest (auxiliary backrest plate) can be opened and closed, and when the foot rest is tilted backwards with respect to the seat back, the foot of the rear seat occupant can be placed on the foot rest and the opening There is provided a seat for use in an automobile or the like, which can extend its legs to a seat cushion (seat portion) of a front seat through the seat.

[0006] However, when the user sits in a sitting position, both lower limbs are located outside the legs supporting the seat, but since the legs have a lateral dimension close to the lateral width of the seat, both lower limbs are significantly opened. It becomes a leg condition, especially for men. On the other hand, the latter is related to the seat for the automobile, and therefore, the sitting position and the cross position are not considered at all, and only the footrest that can be used by the passenger in the rear seat is provided.

[0005]

In view of the above-mentioned situation, the present invention is to solve the problem that the lower limbs can be seated with their legs extended, and that the load on the lower limbs is exerted even in the sitting state of sitting straight or cross-legged. The point is to provide a seat chair having a seat portion and a backrest portion that can be seated in a posture in which the back muscles are stretched while the number of seats is reduced.

[0006]

In order to solve the above-mentioned problems, the present invention is a seat chair comprising a seat portion and a backrest portion, and a buttocks can be placed on the rear central portion of the seat portion. An auxiliary seat plate of a size is provided, and the auxiliary seat plate can be freely moved up and down by an elevating part of an elevating mechanism installed at a central portion in the lateral direction in a front view,
The space between the main seat surface of the seat and the seat surface of the auxiliary seat plate when descending, and between the main seat surface and the lower surface of the auxiliary seat plate when ascending so that the lower limbs can be accommodated on both sides of the elevating part. To form a sitting chair.

A seat chair comprising a seat portion and a backrest portion, wherein an auxiliary seat plate having a size capable of mounting the buttocks is provided at the rear center of the seat portion, and the auxiliary seat plate is viewed from the front. At the center of the horizontal direction, it is possible to move up and down by the elevating part of the elevating mechanism.When descending, the main seat surface of the seat part and the seat surface of the auxiliary seat plate are flush, and when ascending, the main seat surface and the auxiliary seat plate are A space is formed between the lower surface and both sides of the elevating part to accommodate lower limbs, and an auxiliary spine that can be opened and closed around the lower end in an opening formed in the lower end of the backrest part. A seat chair is provided which has a backrest plate, and when the auxiliary backrest plate is opened rearward, the toes through the opening can be placed.

[0008]

According to the seat chair of the present invention having the above-mentioned contents, the auxiliary seat plate having a size capable of mounting the buttocks provided on the rear center of the seat is provided at the center in the lateral direction when viewed from the front. Since the lifting and lowering part of the lifting and lowering mechanism can move up and down, the auxiliary seating plate is raised, and the auxiliary seating plate is located between the main seating surface of the seating part and the lower surface of the auxiliary seating plate on both sides of the lifting and lowering part. The lower limbs can be accommodated in the formed space so that the person can sit in a sitting position. Further, it is possible to fold the lower limbs in front of the elevating part while sitting on the auxiliary seating plate and to sit in the cross seat. Furthermore,
Since the main seat surface of the seat portion and the seat surface of the auxiliary seat plate are flush with each other when the auxiliary seat plate is lowered, it is of course possible to take a normal sitting state with the lower limbs extended forward.

In the case of a seated person with long lower limbs, an auxiliary backrest plate provided at the lower end of the backrest is opened rearward around the lower end of the backrest so that the toe is opened in the normal sitting state. It is possible to allow it to escape, or it is possible to place the toes on the upper surface of the rear auxiliary backrest plate through the opening.

[0010]

The present invention will be described in more detail with reference to the embodiments shown in the accompanying drawings. FIG. 1 shows a typical embodiment of the present invention, in which 1 is a seat portion, 2 is a backrest portion, 3 is a pedestal, 4 is an auxiliary seat plate, and 5 is an auxiliary backrest plate. 2 shows a state in which the auxiliary seat plate 4 is raised, and FIG. 3 shows a state in which the auxiliary seat plate 4 is raised and the auxiliary backrest plate 5 is tilted rearward.

The seat chair according to the present invention has at least a seat portion 1 and a backrest portion 2 standing upright behind the seat portion 1, and the backrest portion 2 appropriately adjusts a tilt angle in the front and rear with respect to the seat portion 1. It is possible. The seat portion 1 is a pedestal 3 that is placed on a carpet or tatami mat.
On the other hand, it is rotatably supported by an appropriate rotation supporting means 6 such as an appropriate ball bearing.

A recess 8 for accommodating an auxiliary seat plate 4 having a size capable of mounting the buttocks of a seated person is formed in a part of a main seat surface 7 of the seat portion 1 at the rear center thereof. An elevating part 10 of an elevating mechanism 9 whose height can be adjusted is arranged in the central part of the recess 8 and the elevating part 10 is provided below the lateral center part of the auxiliary seat plate 4 in a front view. ing. The elevating mechanism 9 is not particularly limited, and an appropriate mechanism such as a gas cylinder system, a link system, or a gear system is adopted.
No. 0 is covered with a cover so that the mechanism part is not exposed.
Incidentally, reference numeral 11 in the figure denotes a lifting operation section of the lifting mechanism 9.

Here, the lateral width of the elevating part 10 is set sufficiently smaller than the lateral width of the auxiliary seat plate 4, that is, the lateral width of the lower limbs in the normal sitting state, and the auxiliary seat plate 4 is raised. At times, between the main seat surface 7 of the seat portion 1 and the lower surface of the auxiliary seat plate 4, a space 12 for accommodating a lower limb is formed on both sides of the elevating portion 10. Further, the depth of the recess 8 is set so as not to be too deep so that the lower limbs do not feel uncomfortable in a sitting position, and the thickness of the auxiliary seat plate 4 is also set accordingly. Further, since the vertical position of the auxiliary seat plate 4 can be set to an arbitrary position by the elevating mechanism 9, it can be adjusted according to the physique of the seated person. When the auxiliary seat plate 4 is lowered, the main seat surface 7 of the seat portion 1 and the seat surface 13 of the auxiliary seat plate 4 are set to be flush with each other, whereby the main seat surface 7 and the seat surface 13 are Together, they can take a sitting state in a normal seat chair with the lower limbs extended forward.

Further, at the lower end of the backrest portion 2, an opening portion 15 penetrating forward and backward except for the support portions 14 on both sides.
The lower end of the opening portion 15 can be opened and closed by the auxiliary backrest plate 5 attached to the backrest portion 2 by an appropriate rotation mechanism, and the auxiliary backrest plate 5 is tilted rearward to open the opening portion. When 15 is opened, the upper surface 16 of the backrest 2
The main seat surface 7 of the seat portion 1 is set to be substantially flush with the main seat surface 7. In addition, reference numeral 17 in the drawing denotes a rotating operation portion of the auxiliary backrest plate 5.

Therefore, in the case of sitting straight on the chair of the present invention, as shown in FIGS. 3 and 4, the elevating mechanism 9 is driven to elevate the elevating section 10 to raise the auxiliary seat plate 4. A predetermined space 12, 12 is formed between the lower surface and the main seat surface 7 of the seat portion 1 on both sides of the elevating portion 10, and the auxiliary backrest plate 5 is opened rearward so that the seated person A The buttocks a of the above is placed on the seating surface 13 of the auxiliary seating plate 4, the lower limbs b are folded and accommodated in the space 12, and the toe c is placed on the upper surface 16 of the auxiliary backrest plate 5 which is laid down through the opening 15, or It is located in the opening 15. In this normal sitting state, both lower limbs b of the occupant A can be made substantially parallel to each other at an interval substantially equal to the lateral width of the elevating part 10 and can be seated in a more natural state. Of course, spread the toes c, c,
The seated person A who can comfortably sit with the lower limbs b in a C-shape in plan view can be placed in such a seated state. Here, when the physical size of the seated person A is small, or the lower limb b
When the length is short, the toe c may not hit the auxiliary backrest plate 5 even if the opening 15 is closed by the auxiliary backrest plate 5, or the toe c contacts the auxiliary backrest plate 5 but is not pressed. Sometimes.

Further, in the case of sitting on the cross, as shown in FIGS. 2 and 5, the auxiliary seat plate 4 is raised and the buttocks a of the occupant A are placed on the seat surface 13 of the auxiliary seat plate 4. The lower limb b is folded into a cross-legged state and placed on the main bearing surface 7 of the seat 1. In this case, it is not necessary to open the auxiliary backrest plate 5 rearward, and the opening 15 remains closed.

[0017]

The seat chair according to the present invention as described above is a seat chair comprising a seat portion and a backrest portion, and an auxiliary member having a size capable of mounting the buttocks on the rear central portion of the seat portion. A seat plate is provided, and the auxiliary seat plate is movable up and down by an elevating part of an elevating mechanism installed at the center in the lateral direction in a front view, and when descending, the main seat surface of the seat part and the seat surface of the auxiliary seat plate are flush with each other. Since a space is formed between the main seat surface and the lower surface of the auxiliary seat plate when ascending so that the lower limbs can be accommodated on both sides of the elevating part, the seat should be raised with the auxiliary seat plate raised. Between the main seating surface of the lower part and the lower surface of the auxiliary seating plate, the lower limbs can be accommodated in the space formed on both sides of the elevating part and seated in the right seated state, and the lower limbs even if seated for a long time Since the burden is small and the lower limbs are not pressed, there is no numbness or pain, and the back muscles can be maintained in a stretched state. Moreover, since the lower limbs of the seated person are accommodated in the space formed on both sides of the elevating part provided in the lateral center of the auxiliary seat plate, both lower limbs are seated in a natural state in which they are substantially parallel and closed. It is possible. It is also possible to fold the lower limbs in front of the lifting seat while sitting on the auxiliary seat to sit in the cross seat. Since it is flush, it is possible to take a normal sitting state with the lower limbs extended forward.

In the case of a seated person with a long lower limb, the auxiliary backrest plate provided at the lower end of the backrest is opened rearward around the lower end of the seat so that the toe is opened in the normal sitting state. Since the toes can be released or the toes can be placed on the upper surface of the rear auxiliary backrest plate through the opening, it is possible to take a very comfortable sitting position.

[Brief description of drawings]

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

FIG. 2 is a perspective view of a state where the auxiliary seat plate is also raised.

FIG. 3 is a perspective view showing a state where the auxiliary seat plate is lifted up and the auxiliary backrest plate is opened rearward.

FIG. 4 is a simplified side view showing a state where the user sits down on a chair according to the present invention.

FIG. 5 is a simplified side view of the seat of the present invention seated in a cross seat.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat part 2 Backrest part 3 Pedestal 4 Auxiliary seat plate 5 Auxiliary backrest plate 6 Rotation support means 7 Main seat surface 8 Recess 9 Elevating mechanism 10 Elevating part 11 Elevating operation part 12 Space 13 Seat surface 14 Support part 15 Opening part 16 Upper surface 17 Rotation operation part

Claims (2)

[Claims] 1. A seat chair comprising a seat portion and a backrest portion, wherein an auxiliary seat plate having a size capable of mounting a buttocks is provided at a rear center portion of the seat portion, the auxiliary seat plate being viewed from the front. At the central part of the horizontal direction, it is possible to move up and down by the lifting part of the lifting mechanism.
The space between the main seat surface of the seat and the seat surface of the auxiliary seat plate when descending, and between the main seat surface and the lower surface of the auxiliary seat plate when ascending so that the lower limbs can be accommodated on both sides of the elevating part. Seat chair characterized by being formed. 2. A seat chair comprising a seat portion and a backrest portion, wherein an auxiliary seat plate having a size capable of mounting the buttocks is provided at a rear center portion of the seat portion, the auxiliary seat plate being viewed from the front. At the central part of the horizontal direction, it is possible to move up and down by the lifting part of the lifting mechanism.
The space between the main seat surface of the seat and the seat surface of the auxiliary seat plate when descending, and between the main seat surface and the lower surface of the auxiliary seat plate when ascending so that the lower limbs can be accommodated on both sides of the elevating part. And an opening formed at the lower end of the backrest portion is provided with an auxiliary backrest plate which can be opened and closed about the lower end, and the opening portion is opened when the auxiliary backrest plate is opened rearward. A seat chair characterized by being able to place the toes through it.