JPH10165253A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase holding force with the increase of a sheet angle by connecting the rear end part of a seat surface frame to the lower end part of a back surface frame so as to be freely rotation possible and connecting the connecting fixture receiver of the seat surface frame to the connecting fixture receiver of the back surface frame with connecting fixtures. SOLUTION: The rear end part of the seat surface frame constituted by a seat part 8 where a bending possible seat side surf ace part 7 with the connecting fixture receiver 4 is fixed is connected to the lower end part of the back surface frame constituted by a back part 10 where a bending possible back side surface part 9 with the connecting fixture receiver 4 is fixed with engaging fixtures 3 so as to be freely rotation possible. The connecting fixture receiver 4 of the seat surface frame is connected to that of the back surface frame with the connecting fixtures 5. The connecting fixtures 5 is connected and fixed to the connecting fixture receiver 4 by a pin which penetrates the connecting fixture receiver 4. The rear end part of the seat surface frame is connected to the lower end part of the back surface frame is connected to the lowr end part of the back surface frame with the engaging fixtures which is fixed to the seat surface frame so as to be freely rotation possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair whose seating position can be changed.

[0002]

2. Description of the Related Art In a conventional chair, as shown in FIG. 16, a rear end portion of a seat frame 17 and a lower end portion of a rear frame 18 are connected via an angle holding fixture such as a ratchet type bracket 19, and the like. As shown in FIG. 13, an angle 20 between the seat surface 22 and the back surface 23 (hereinafter, seat angle 20) is fixed.

[0003]

FIG. 17 shows a configuration in which the rear end of the seat frame 17 and the lower end of the rear frame 18 are connected via an angle holding fixture such as a ratchet-type fitting 19. As shown in FIG. 7, the ratchet-type bracket 19 is fixed at a predetermined angle 26 in several steps. For this reason, the user can select the angle to be set and fix the seat angle 20 of the chair. However, since it is necessary to fix the seat angle, there is a problem that the seat angle 20 cannot be flexibly changed by an operation such as applying weight to the back while sitting down, depending on the taste of the user. In general, when sitting for a long time,
It is known that sitting down with the seat angle 20 fixed increases the fatigue of the user.

In the above-mentioned chair, as shown in FIGS. 14 and 15, the seat side 7 and the back side 9 apply a force 21 for holding the user's body side (hereinafter referred to as a hold force 21) to the seat angle. Since the seat angle 20 cannot be increased in conjunction with the increase of the seat angle 20, the holding force 21 which is required to be increased originally becomes insufficient as the seat angle 20 increases, and there is a disadvantage that the stability of the body holding and the feeling of sitting are impaired.

An object of the present invention is to link a holding force 21 to a side of a user's body with a change in a seat angle 20,
The object is to provide a wheel in which the holding force 21 can increase as the seat angle 20 increases.

[0006]

The means of the present invention are as follows.

<Means 1> A rear end of the seat frame 1 and a lower end of the rear frame 2 are rotatably connected via a fitting 3.

<Means 2> A pair of left and right connecting member receivers 4
A flexible seat frame 1 and a rear frame 2 are provided, and the connector receiver 4 of the seat frame 1 and the connector receiver 4 of the rear frame 2 are connected via a connector 5.

[0009]

Since the rear end of the seat frame 1 and the lower end of the rear frame 2 are rotatably connected via the fitting 3, the seat angle 20 changes when the user applies weight to the back. , The seat angle 20 changes with the fitting 3 as the center of rotation.

The side surfaces of the seat frame 1 and the rear frame 2 are connected to each other by a pair of right and left connecting member receivers 4 via connecting members.
The relative distance between them is kept constant. Therefore, when the seat angle 20 increases, the seat frame 1 and the rear frame 2
Since the tensile force acts on the side portion of the seat 5 and the connecting tool 5, the bendable seat surface frame 1 and the back frame 2 respectively have a direction in which the width direction distance 24 between the left and right side surfaces is shortened (the seat surface and the back surface). (Inward).

[0011] The bending force in the direction in which the width direction distance 24 between the left and right side surfaces of the seat frame 1 and the rear frame 2 decreases becomes shorter, and the holding force 21 on the user's body is changed.
Can be increased. Further, since the amount of deflection 25 does not exceed the seating width of the user himself, the seat angle 20 depends only on the physique of the user, that is, the seating width of the waist periphery, increases only up to a certain angle, and does not increase any more. Show behavior.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a perspective view of a chair frame according to the present invention,
2 shows a side view, FIG. 3 shows a front view, and FIG. 4 shows a plan view. FIG. 4 also shows the bent state of the seat side surface and the back side surface with broken lines.

The chair according to the present invention comprises a rear end portion of the seat frame 1 comprising a seat portion 8 to which the deflectable seat side portion 7 is fixed, to which the connecting member receiver 4 is attached, and the connecting member receiver 4. The lower end of the back frame 2, which is composed of the attached back portion 10 to which the flexible back side portion 9 is fixed, is rotatably connected via the fitting 3.

The connector receiver 4 of the seat frame 1 and the connector receiver 4 of the rear frame 2 are connected via a connector 5.

As shown in FIG. 5, the connector 5 is connected and fixed to the connector receiver 4 by pins 11 penetrating both ends of the connector 4. The pin 11 is freely rotatable with respect to the connector receiver 4.

As shown in FIG. 6, the rear end of the seat frame 1 is rotatably connected to the lower end of the rear frame 2 via a fitting 3 fixed to the seat frame 1. .

As shown in FIG.
Can be connected via a winding spring 12, and can be connected via a leaf spring 13 as shown in FIG. Also, as shown in FIG. 9, the connection can be made via a length adjustment mechanism such as an adjustment bolt / nut 14.

In this embodiment, as shown in FIG. 10, a seat 8 to which a flexible seat side 7 is fixed and a back 10 to which a flexible back side 9 is fixed are respectively mounted on the seat frame 1. , The rear frame 2, as shown in FIG. 11, each side portion is constituted by several divided side members 15, and connected and constituted by using several connecting members 16. Also, with the seat frame 1 and the rear frame 2,
The number of divisions may be changed.

[0019]

Since the chair of the present invention has the above-described structure, the following effects can be obtained. (1) The user can always sit while changing the seat angle 20 according to the user's preference. For this reason, it is possible to suppress physical fatigue caused by sitting for a long time. (2) Depending on the user's preference, the body side holding force 21
Can be easily adjusted. (3) In conjunction with the increase in the seat angle 20, the holding force 21
Increases, the stability of seating is improved, and the seating feeling is improved. (4) By additionally setting springs to the connecting member 5, a more comfortable sitting comfort can be obtained. (5) The seat angle 20 can be finely adjusted by additionally setting the length adjusting function to the connecting tool 5.

[Brief description of the drawings]

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

FIG. 2 is a side view of the same.

FIG. 3 is a front view of the same.

FIG. 4 is a plan view of the same.

FIG. 5 is a vertical cross-sectional view showing the connection between the connector and the connector receiver.

FIG. 6 is a side view showing a connection portion between the seat frame and the rear frame.

FIG. 7 is a front view showing an embodiment of the coupler.

FIG. 8 is a front view showing an application example of the coupler.

FIG. 9 is a front view of the above.

FIG. 10 is a longitudinal sectional view showing an example of a side member.

FIG. 11 is a longitudinal sectional view showing an application example of the side member.

FIG. 12 is a perspective view showing a finished state of a seat surface and a back surface.

FIG. 13 is a side view showing a seat angle.

FIG. 14 is a plan view showing a holding force on the back surface.

FIG. 15 is a front view showing the holding force of the seat.

FIG. 16 is a perspective view of a conventional chair frame.

FIG. 17 is a side view of the ratchet-type bracket.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat frame 2 Back frame 3 Fitting tool 4 Connector receiving 5 Connector 6 Pin receiver 7 Seat side part 8 Seat part 9 Back side part 10 Back part 11 Pin 12 Winding spring 13 Leaf spring 14a Adjustment bolt 14b Adjustment nut 15 Side Member 16 Connector 17 Seat frame 18 Back frame 19 Ratchet bracket 20 Seat angle 21 Hold force 22 Seat 23 Back 24a Width direction distance (small seat angle) 24b Width direction distance (large seat angle) 25 Deflection Quantity 26 several levels of angles

Claims (1)

[Claims] 1. A seat frame provided with a pair of left and right connector receivers on a side portion, and a back frame provided with a pair of left and right connector receivers on a side portion, wherein a rear end portion of the seat frame and a back frame are provided. The lower end is rotatably connected, and the connecting member receiver of the seat frame and the connecting member receiver of the rear frame are connected via a connecting member.