JPH11178669A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair wherein a rising speed of a seat part can be changed even if a spring member is not replaced. SOLUTION: One of the ends 4a of a coil spring 4, as a spring member, is connected to a shaft 3 disposed on a proximal part 2a of a seat 2 and the other end 4b of the spring 4 is connected to the seat 2 to urge the seat 2 in a direction in which the forward end 2d of the seat 2 is raised with respect to the shaft 3. A connector 5 including a plurality of connection parts 5a, into each of which the end 4a can be inserted, is fixed on the shaft 3. By changing the connection part 5a for connection with the end 4a of the spring 4, the rising speed of the seat 2 can be changed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair which is urged by a spring member, and in which the front end of the seat stands up when not in use.

[0002]

2. Description of the Related Art The above-mentioned chair which stands up when the front end of the seat is not in use is often used in theaters, movie theaters and the like.

[0003]

In this type of chair, when a person stands up, the seat stands up.
This is because the shaft supporting the seat and the seat are connected by a spring member. Therefore, when trying to change the speed at which the seat rises, it has conventionally been time-consuming to replace the spring member without changing the spring member to one having a different elasticity.

[0004] Further, regardless of which spring member is employed, the seat rotates around the shaft at the same speed from the beginning to the end of rising. Therefore, even when the seat finally collides with the backrest, it collides vigorously and a loud collision sound is generated. Therefore, when standing up, it is necessary to stand up while holding down the seat with hands or the like.

[0005] The present invention has been made in view of the above,
First, it is a first object to provide a chair capable of changing a rising speed of a seat portion without performing a replacement operation of a spring member. It is a second object of the present invention to provide a chair that can reduce the collision sound when the seat collides with the backrest.

[0006]

According to a first aspect of the present invention, there is provided a chair according to the present invention, wherein one end is connected to a shaft disposed on a base side of a seat, and the other end is connected to the seat. In a chair having a spring member that is connected and biases the front end portion of the seat portion around the shaft in a direction of rising, a connection position of one end of the spring member to the shaft can be changed. A chair according to a second aspect of the present invention is the chair according to the first aspect, further comprising a connecting body fixed to the shaft and having a plurality of connecting portions for connecting one end of a spring member. It is characterized by the following. Further, in order to solve the above-mentioned problem, a third aspect is provided.
In the chair of the present invention described above, one end is connected to a shaft disposed on the base side of the seat, the other end is connected to the seat, and the chair is attached in a direction in which the front end of the seat is raised around the shaft. A chair having a biasing spring member, comprising a main body case and a rotating shaft, one of which is connected to the shaft and the other is provided with a rotary damper connected to the seat. A chair according to a fourth aspect of the present invention is the chair according to the third aspect, wherein a connecting position of one end of a spring member to the shaft can be changed. The chair according to the fifth aspect of the present invention provides the chair according to the fourth aspect.
The chair according to any one of claims 1 to 3, further comprising a connecting body fixed to the shaft and having a plurality of connecting portions for connecting one ends of the spring members.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. In the figure, reference numeral 1 denotes a chair according to the present embodiment. The chair 1 has a seat 2 on which a user sits, and the seat 2 is located near a base 2 a of the seat 2.
A shaft 3 which is a center of rotation of the shaft 3 is provided. FIG.
Is a view of the seat portion 2 as viewed from the back surface 2g side. As shown in the figure, the seat portion 2 has a concave back surface 2g, and the shaft 3 is attached to both side walls 2b and 2c. End 3
a, 3b side, and the end portions 3a, 3b
b, 2c project outward. These ends 3a, 3b
Is connected and fixed to an appropriate stationary part, usually an armrest (not shown). Accordingly, when a person sits down, the tip 2d of the seat 2 rotates around the shaft 3 toward the upper side of FIG. 1, and when the person stands up, the tip 2d is urged by a spring member to be described later. 1 It turns from the front to the rear, and the state shown in FIG. 1 is obtained. Reference numerals 2e and 2f denote stoppers protruding from both side walls 2b and 2c of the seat 2, and come into contact with an appropriate portion such as an armrest or a backrest (not shown), and a rotation range of the seat 2. Is regulated.

On one end 3a side of the shaft 3, a coil spring 4 as a spring member is disposed. Specifically, the coil spring 4 is provided on the shaft 3, and one end 4 a is connected and fixed to the shaft 3. In this embodiment, an annular connector 5 that is non-rotatably attached to the shaft 3 is used as the connecting means. The connecting body 5 has a plurality of concave grooves 5a on its inner peripheral surface.
Are formed, and the groove portion 5a functions as a connection portion. The other end 4b of the coil spring 4 is engaged with a bolt 2h projecting inward from one side wall 2b of the seat 2 (see FIG. 2).

On the other end 3b side of the shaft 3, a rotary damper 6 is provided. This rotary damper 6 is shown in FIG.
As shown in the figure, the main body case 6a and the main body case 6a
And a hollow rotary shaft 6b inserted therein.
A viscous liquid is filled between the main body case 6a and the rotating shaft 6b. The main body case 6a is connected to the other side wall 2 of the seat 2.
The other end 3b of the shaft 3 is inserted into the hollow portion of the hollow rotary shaft 6b so as not to rotate relative to the hollow rotary shaft 6b. As described above, the other end 3b of the shaft 3 is fixedly connected to an immovable portion such as an armrest, so that the main body case 6a constituting the rotary damper 6 rotates with the rotating shaft 6b Rotate around. Thereby, the viscous resistance of the viscous liquid acts.

According to the present embodiment, when not in use, the seat portion 2 is in a state of standing up as shown in FIG. 1 by the elastic force of the coil spring 4. When the user sits on the seat 2, the seat 2 rotates around the shaft 3 in FIG. 1 so that the tip 2 d side comes to the near side. At this time, since one end 4a of the coil spring 4 is inserted and connected to an arbitrary groove 5a of the connection body 5, the other end 4b engaged with the seat 2 is twisted by approximately 90 degrees.

As a result, the seat part 2 is urged by the coil spring 4 in the direction in which it rises. Therefore,
When the user stands up from this state, the load on the seat 2 is released, so that the seat 2 turns and rises to the state shown in FIG. At this time, according to the present embodiment, since the main body case 6a of the rotary damper 6 rotates about the rotary shaft 6b together with the seat 2, the viscosity of the viscous liquid filled between the main body case 6a and the rotary shaft 6b is increased. Resistance works. Therefore, the main body case 6a and the seat 2 rotate slowly.

When the resilience of the coil spring 4 is changed, one end 4a of the coil spring 4 is inserted into a different one of the plurality of grooves 5a of the connecting member 5 and connected. In either case of increasing the elasticity or decreasing the elasticity, it is only necessary to change the groove 5a to be inserted, and there is no need to replace the coil spring 4 itself with a different one.

In the above embodiment, the coil spring 4 is used as the spring member. However, other spring members such as a leaf spring and a spiral spring can be used. In any case, any configuration may be used as long as the connection position of one end of the spring member to the shaft 3 can be changed.

In the above-described embodiment, the rotary damper 6 utilizing the viscous resistance of the viscous liquid is provided, but the type of the rotary damper 6 is not limited to this. For example, a rotary damper using a dynamic pressure resistance generated when a viscous liquid passes through an orifice is formed by projecting a vane (not shown) having an orifice on the peripheral surface of the hollow rotary shaft by reducing the diameter of the hollow rotary shaft. It can also be used.

Further, in the above-described embodiment, both the structure capable of changing the connection position of the coil spring 4 as the spring member and the structure of the rotary damper 6 are provided.
The first and second objects of the present invention can both be achieved. However, in order to achieve only the first object of the present invention, it is only necessary to provide a configuration capable of changing the connection position of the coil spring 4. Only the configuration including the damper 6 may be adopted.

[0016]

According to the chair of the first aspect of the present invention,
Since the connection position of one end of the spring member to the shaft can be changed, the rising speed of the seat portion can be changed without replacing the spring member. According to the chair of the second aspect of the present invention, since the connecting member having a plurality of connecting portions for connecting one end of the spring member is fixedly disposed on the shaft, the connecting position of one end of the spring member can be easily changed. It is possible. According to the chair of the third aspect of the present invention, since the rotary damper is provided, it is possible to reduce the collision sound when the seat collides with the backrest. According to the chair according to the fourth aspect of the present invention, since the rotary damper is provided and the connecting position of one end of the spring member to the shaft can be changed, the sound of collision with the seat back can be reduced. And the rising speed of the seat can be changed. According to the chair of the present invention described in claim 5, the chair is provided with a rotary damper,
Since the connecting member having a plurality of connecting portions for connecting one end of the spring member is fixedly disposed on the shaft, it is possible to reduce the collision sound to the backrest of the seat portion and to reduce the connecting position of one end of the spring member. It can be easily changed.

[Brief description of the drawings]

FIG. 1 is a bottom view showing one embodiment of a chair of the present invention.

FIG. 2 is an arrow view as viewed from a point P in FIG. 1;

FIG. 3 is a cross-sectional view for explaining a structure of a rotary damper used in the embodiment.

[Description of Signs] 1 Chair 2 Seat 3 Shaft 4 Coil spring 5 Connection body 6 Rotary damper

Claims (5)

[Claims] 1. A spring, one end of which is connected to a shaft disposed on the base side of the seat, and the other end of which is connected to the seat, for urging the front end of the seat about the shaft in a direction of rising. A chair having a member, wherein a connection position of one end of a spring member to the shaft can be changed. 2. The chair according to claim 1, further comprising a connecting member fixed to the shaft and having a plurality of connecting portions for connecting one end of a spring member. . 3. A spring having one end connected to a shaft disposed on the base side of the seat, the other end connected to the seat, and biasing the front end of the seat about the shaft in a direction of rising. A chair having a member, comprising: a main body case and a rotation shaft, one of which is connected to the shaft and the other is provided with a rotation damper connected to the seat. 4. The chair according to claim 3, wherein a connection position of one end of a spring member to the shaft can be changed. 5. The chair according to claim 4, wherein a connection body fixed to the shaft and provided with a plurality of connection portions for connecting one end of a spring member is provided. .