JP2001017340A - Chair for bathroom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain an always table centroid balance at a least possible necessary longitudinal leg width by providing the above chair with a means for cooperatively changing the angle of inclination of a seat surface or back rest and the longitudinal position of the seat surface and back rest with respect to legs. SOLUTION: The upper parts of a pair of the right and left leg frames 2 are provided with a pair of right and left bearing members 8 facing each other and the angle regulating shaft 6 is suspended to the bearing members 8 at its both ends 6a. Both ends 6a of the angle regulating shaft 6 are formed to a square rod shape and fits to one of the groove parts 9 of the bearing members 8. The groove parts 9 are arranged in right and left positions facing each other to one row in a longitudinal direction and are respectively formed to the groove shapes respectively varying in the angles of inclination in such a manner that the angle regulating shaft 6 fitted in these groove parts is rotated and fitted by the determined angle around its axial center as the shaft moves forward and that the angle of inclination of the seat surface 3 increases toward the direction where the front part of the seat surface 3 rises. Then, the angles of inclination of the seat surface 3 and the back rest 4 may be changed stepwise.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair used in a bathroom, and more particularly to a bathroom chair suitable for a person to maintain a stable sitting position.

[0002]

2. Description of the Related Art Conventionally, bathroom chairs have been devised in which the inclination angle of a seat surface or a backrest is variable and the posture of a sitting position can be changed.

In a conventional bathroom chair in which the inclination angle of the seat surface or the backrest is variable, if the inclination angle is changed, the center of gravity of the occupant moves in the front-back direction. If the balance is extremely biased forward or backward, there is a risk of falling. Or, because the legs are widened in the front-back direction to prevent falling, the size of the seat and back is larger than that of fixed chairs, and it is difficult to use in places where the installation space is not wide enough. is there. The present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide a chair used in a bathroom, in which the center of gravity of a sitting person can be changed even when the inclination angle of a seat surface or a backrest is greatly changed. It is an object of the present invention to provide a chair which can maintain a stable center of gravity balance with a small change in position and a minimum necessary leg width in the front-rear direction.

In order to achieve the above object, the present invention comprises means for changing the inclination angle of the seat or the backrest and the position of the seat and the backrest with respect to the leg in the front-rear direction. ing.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described. 1 to 4 show a first embodiment. The bathroom chair 1 of this embodiment is a four-legged chair and includes a leg frame 2, a seating surface 3, a backrest 4, and an armrest 5. The seat 3, the backrest 4, and the armrest 5 are all fixed to an angle adjusting shaft 6. A pair of left and right inverted U-shaped leg frames 2
At a substantially central portion, the structure is connected by a horizontal frame 7 to be self-standing. A pair of left and right bearing members 8 are provided on the upper portions of the pair of left and right leg frames 2 so as to face each other, and the angle adjusting shaft 6 is suspended from the bearing members 8 at both ends 6a. Both ends 6 a of the angle adjusting shaft 6 are shaped like square bars, and fit into one of the four grooves 9 of the bearing member 8. The groove portions 9 are arranged in a line in the front-rear direction at positions opposed to each other in the left-right direction.
9b, 9c and 9d, the angle adjusting shaft 6 to be fitted is rotated and fitted by a predetermined angle around the axis thereof, and the seat surface 3 is raised in a direction in which the front of the seat surface 3 rises. Are formed with different inclination angles so that the inclination angle becomes larger. Thereby, the angle adjusting shaft 6 can be selectively suspended at different axial twist angles and positions. The bearing member 8 is fixed by the upper lid 10 so that the angle adjusting shaft 6 does not come off from the bearing member 8 and is covered so as not to be exposed. Thus, the bathroom chair 1 of this embodiment is
The inclination angle of the seat 3 and the backrest 4 can be changed stepwise, and the positions of the seat 3 and the backrest 4 are linked back and forth so that the position of the center of gravity of the sitting person hardly moves with respect to the legs. The balance of the center of gravity can always be maintained with the minimum necessary leg width in the front-rear direction. 5 and 6 are views showing a second embodiment. The bathroom chair 11 of this embodiment is a four-legged chair, and includes a leg frame 2, a seating surface 3, a backrest 4,
Armrest 5 is provided. 3 seats, 4 backs, 5 armrests
Are fixed to the angle adjustment shaft 6. A pair of right and left inverted U-shaped leg frames 2 is provided with a horizontal frame 7 at a substantially central portion.
It is connected and is independent. In this embodiment,
At both ends of the angle adjusting shaft 6, a plate member 14 having a screw portion 12 and a guide pin 13 protruding outward is fixed, and a pair of left and right gear rollers 15 are rotatably provided inside the plate member 14 so as to be rotatable. Has been inserted. Gear roller 1
5 freely rotates freely without being affected by the rotation of the angle adjustment shaft 6. The bearing member 16 attached to the upper part of the pair of left and right leg frames 2 is provided with a screw portion guide elongated hole 17 extending substantially horizontally and a side plate 19 provided with a pin guide elongated hole 18.
And a bottom plate 21 provided with a rack 20 extending in the front-rear direction in which the left and right gear rollers 15 run in synchronization with the angle adjusting shaft 6. Screw part 12 and guide pin 1
Numeral 3 can move in the long hole by passing through the screw portion guide long hole 17 and the pin guide long hole 18, respectively. Pin guide slot 18
Is arranged at a position above the screw portion guide long hole 17, and
As the angle adjusting shaft 6 moves from the rear to the front, the plate member 14 is provided so as to rotate around the axis of the screw portion 12 by the movement path of the screw portion 12 and the guide pin 13.
Thereby, the angle adjustment shaft 6 can move in the front-rear direction while synchronizing both ends, and the plate member 14 moves while rotating around the axis in conjunction with the movement of the angle adjustment shaft 6 in the front-rear direction. , The angle adjusting shaft 6 moves while rotating in conjunction therewith. That is, the angle adjustment shaft 6 is suspended so that the rotation of the shaft and the horizontal movement can be interlocked, and when the angle adjustment shaft 6 is moved from the rear to the front, the seating surface 3 is continuously inclined in the direction in which the front part is raised, and the rear is tilted. Move forward from. In addition, the opposite movement is performed. Then, the tip of the screw portion 12 protruding outward from the screw portion guide long hole 17 is connected to the nut 2 at an arbitrary position.
The angle adjustment shaft 6 can be fixed by tightening to the side plate 19 of the bearing member 16 at 2. Further, the bearing member 1
6 is covered with an upper lid 23 and a lower lid 24 so as not to be exposed. Thus, the bathroom chair 11 of the present embodiment can continuously change the inclination angle of the seat 3 and the backrest 4, and can prevent the position of the center of gravity of the sitting person from moving. The position of the backrest 4 changes in conjunction with the front and rear, and a stable balance of the center of gravity can always be maintained with the minimum necessary leg width in the front and rear direction. In both the first embodiment and the second embodiment, the example in which the seat surface, the backrest, and the armrest are connected to each other and tilted integrally to move in the front-back direction is shown. However, only the backrest tilts, and the seating surface is interlocked with it. A structure in which the backrest and the armrest move in the front-back direction may be used. Also, the armrest is not required. In addition, casters were attached to the legs of the chair,
It may be a shower carry.

As described above, according to the present invention, the position of the center of gravity of the occupant is small even when the inclination angle of the seat surface or the backrest is changed, and the center of gravity and the backrest can maintain a stable balance of the center of gravity at any inclination angle. The position in the front-rear direction is automatically determined, and it is possible to provide a bathroom chair that is always stable and hard to fall down with a minimum necessary front-rear leg width.

[Brief description of the drawings]

FIG. 1 is a perspective view of a bathroom chair according to a first embodiment of the present invention, in which a seat surface is in a horizontal state.

FIG. 2 is an exploded perspective view of the bathroom chair according to the first embodiment of the present invention.

FIG. 3 is a schematic side view illustrating a structure of a bearing member of the bathroom chair according to the first embodiment of the present invention.

FIG. 4 is a perspective view of the bathroom chair according to the first embodiment of the present invention, in which a seat surface is inclined by one step.

FIG. 5 is a perspective view of the bathroom chair according to the first embodiment of the present invention, in a state where the seating surface is inclined to the maximum.

FIG. 6 is a perspective view of a bathroom chair according to a second embodiment of the present invention, in which a seating surface is horizontal.

FIG. 7 is an exploded perspective view of a bathroom chair according to a second embodiment of the present invention.

FIG. 8 is a schematic side view illustrating a structure of a bearing member of a bathroom chair according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bathroom chair of 1st Example 2 Leg frame 3 Seat surface 4 Backrest 5 Armrest 6 Angle adjusting shaft 6a End of angle adjusting shaft 7 Horizontal frame 8 Bearing member 9 Groove 9a Groove 9b Groove 9c Groove 9d Groove 10 Top lid 11 Bathroom chair of 2 embodiment 12 Screw portion 13 Guide pin 14 Plate material 15 Gear roller 16 Bearing member 17 Screw portion guide long hole 18 Pin guide long hole 19 Side plate 20 Rack 21 Bottom plate 22 Nut 23 Top cover 24 Lower cover

Claims (5)

[Claims] An angle of inclination of a seat surface or a backrest with respect to a floor surface, and a fixed position of a seat surface and a backrest with respect to a fixed leg for supporting the seat surface or a backrest in a front-rear direction are univocally defined. A bathroom chair having a variable structure for changing in conjunction with the bathroom. 2. The bathroom chair according to claim 1, wherein the variable structure is a structure that changes the inclination angle of the seat surface or the backrest and the fixed position in a stepwise manner. 3. The variable structure includes: a position adjusting member having a plurality of shaft fixing positions provided intermittently so that the inclination angles are different from each other; and an angle for fixing to a seat surface or a backrest. The bathroom chair according to claim 2, further comprising an adjustment shaft, wherein the angle adjustment shaft is selectively suspended at the fixed position. 4. The bathroom chair according to claim 1, wherein the variable structure is a structure that continuously changes the inclination angle of the seat surface or the backrest and the fixed position. 5. The variable structure according to claim 1, wherein the variable structure comprises an angle adjusting shaft fixed to a seat surface or a backrest, and a guide groove for continuously moving the angle adjusting shaft in the front-rear direction. The bathroom chair according to claim 4, characterized in that: