JP2636611B2 - Reclining chair - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reclining chair in which the angle of a backrest can be changed and a footrest is attached to a front portion of a seat so as to be able to come and go.

[0002]

2. Description of the Related Art Conventionally, a reclining chair of this type is disclosed in Japanese Utility Model Laid-Open Publication No.
As shown in -86160, there is known a configuration in which a footrest extends forward of a seat in conjunction with a tilt of a backrest. In other words, when the backrest stands almost vertically, the footrest hangs downward in front of the seat, and when the backrest is tilted almost horizontally, the footrest is horizontal in front of the seat. It is configured to extend to. Usually, in such a reclining chair, the seat is inclined so that its front portion is higher than its rear portion in consideration of the sitting comfort when the backrest is not tilted.

[0003]

In the above publication, the seat is fixed to the legs even when the backrest is tilted, that is, when the seat is reclined, so that the backrest is substantially upright. As in the case of the sitting position, the front of the seat is inclined higher. However, if the backrest is almost horizontal and the front of the seat is inclined high, the back of the user will be kept almost horizontal but the thighs will be lifted. Therefore, the whole body was not fully stretched horizontally and the sitting comfort was poor.

An object of the present invention is to solve such a problem.

[0005]

In order to achieve the above object, the present invention takes the following measures. That is, the reclining chair according to the present invention,
A leg placed on the floor, a backrest that is tiltably attached to the leg with an intermediate portion of the back support rod as a fulcrum, and a seat whose base end is pivotally attached to a back support rod below the fulcrum. Posture changing means for movably connecting the seat to the leg and changing the seat from a tilted posture to a substantially horizontal posture when the backrest is tilted backward, a footrest rotatably attached to a front edge of the seat, The rear end is pivotally attached to the lower end of the back support rod, and the front end is pivotally attached to the lower surface of the footrest. Features. As the posture changing means of the present invention, a second link member having one end pivotally attached to the leg and the other end pivotally attached near the front of the seat, and near the lower end of the back support rod And a spring member which is attached between the leg and the leg and biases the backrest to fall forward. In this case, a gas spring is typically used as the spring member. It is preferable that the second link member is pivotally attached to the leg with a slight forward tilt in a posture before the backrest is tilted rearward in order to restrict unnecessary movement.

[0006]

With such a construction, when the backrest is tilted backward, the portion below the pivot of the back support rod rises forward, thereby raising the base end of the seat, and Since the footrest is pushed forward by the link member, the footrest rotates at the front edge of the seat and gradually approaches a horizontal state. At this time, since the posture changing means lowers the front edge portion of the seat while moving it forward, the front edge of the seat is at the same height as the raised base end, and the seat is at a position where the backrest is almost horizontal. Is changed to an almost horizontal posture. Since the seat is substantially horizontal, the thigh of the user is not lifted, and the sitting comfort when reclining is improved.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1 and FIG. 2, the reclining chair has a leg 1, a backrest 2 attached to the leg 1 so as to be tiltable, and a backrest 2 which is always tilted rearward with a front portion being high and a rear portion being low. Seat 3 which becomes almost horizontal posture when
, A footrest 4 rotatably attached to the front edge 3 a of the seat 3, and an armrest 5 fixed to a side surface of the leg 1. Reference numeral 6 denotes an operation lever for reclining, which will be described later.

As shown in FIGS. 3 and 4, the leg 1 includes a front leg member 1a, a rear leg member 1b longer than the front leg member 1a, and a predetermined angle between the front leg member 1a and the rear leg member 1b with respect to the floor. Member 1c, a reinforcing pipe 1d connecting the front leg members 1a, and a reinforcing pipe 1e connecting the rear leg members 1b, which are connected by welding.

The backrest 2 includes a back support rod 2a and a cushion member 2b fixed to the back support rod 2a. The back support rod 2a has an inverted U-shape when viewed from the front, and a frame 16 for a headrest 2c is fixed by welding to the upper edge thereof, and a round pipe is formed near the lower end 2n. It is connected at 7. In the back support rod 2a having such a configuration, an intermediate portion 2m is pivotally mounted on the rotation shaft 8 with the upper end portion of the rear leg member 1b of the leg 1 as a pivot point P. Therefore, the backrest 2 can be tilted rearward about the rotation axis 8. Further, the lower end 2n of the back support rod 2a located below the pivot point P is provided with a base end 3b of the seat 3.
The rear end 3n of the seat frame 3c is pivotally mounted.

On the front end 3p of the seat receiving frame 3c, a foot rest 4
The substantially U-shaped frame 4a is rotatably mounted.
In the vicinity of the connection between the substantially U-shaped frame 4a and the seat receiving frame 3c, a flat plate-shaped reinforcing member 9 is fixed by welding parallel to the front side frame 4b to reinforce the substantially U-shaped frame 4a. On the lower surface of the reinforcing member 9, a vertical piece 9a for pivotally attaching the link member 10 is provided by welding. On the lower surface near the front end 3p of the seat receiving frame 3c, a vertical piece 13 for pivotally mounting the second link member 12 constituting the attitude changing means 11 is provided.
Has been fixed. The link member 10 has a rear end pivotally attached to a lower end of an arm member 7a fixed to the center of the round pipe 7, and a front end pivotally attached to the vertical piece 9a. Since the arm member 7a extends in the same direction as the downward extension direction of the back support rod 2a, its lower end can be considered substantially as the lower end of the back support rod 2a.

In this embodiment, the posture changing means 11 is mounted between the second link member 12, the vicinity of the lower end 2n of the back support rod 2a and the leg 1, and biases the backrest 2 to fall forward. Gas spring 14 as a spring member
It is composed of In a posture before the backrest 2 is tilted rearward, the second link member 12 is slightly inclined forward, so that its lower end 12n is on the vertical piece 17 on the lower surface of the horizontal member 1c of the leg 1, and The upper end 12m is axially mounted on the vertical piece 13 of the seat receiving frame 3c. The gas spring 14 has a front end 14a pivotally attached to a tongue piece 18 of the front leg member 1a, and a rear end 14b connected to the lower end 2 of the back support rod 2a.
n is attached to the lower end of the extension member 15 to be welded. The gas spring 14 is unlocked when the operation lever 6 is pulled backward,
The extension member 15 is biased so as to be pushed backward, that is, the backrest 2 is pushed forward. Then, when the operation lever 6 is returned to the front initial position from the unlocked state, the locked state is restored.

In the reclining chair having the above-described structure, when the reclining chair is used as a normal chair, the gas spring 14 is locked in an extended state, and the backrest 2 is moved to a position where the gasket 14 is biased forward by the urging force of the gas spring 14. After that, the gas spring 14 is locked and the backrest 2 is stopped. In this case, since the back support rod 2a is in the most upright state in this reclining chair, its lower end 2n is located at the lowest position. Therefore, the base end 3b of the seat 3 is at a position lower than the front edge 3a of the seat 3, and the seat 3 is in a forwardly inclined posture.

Next, when the backrest 2 is tilted backward to be in a reclining state, first, the operating lever 6 is pulled backward to unlock the gas spring 14. In this state, the backrest 2 or the headrest 2c is pushed rearward, and the backrest 2 is tilted. Backrest 2
Is tilted backward, the lower end 2n of the back support rod 2a rises, and the backrest 2 changes its angle in the forward tilt direction and moves forward. That is, the lower end 2n of the back support rod 2a is
Ascending from a lower position with a circular support point P at the pivot point P at the upper end of b ascending upward. As a result, the base end 3b of the seat 3 rises and moves forward. When the seat 3 moves forward, the second link member 1 pivotally mounted on the lower surface of the seat 3
2 is tilted forward, so that the front portion of the seat 3 makes a circular motion with the radius of the length of the second link member 12 as the base end 3b.
It descends in the opposite direction. Then, when the backrest 2 is in the state of being tilted backward at the maximum, the seat 3 assumes a substantially horizontal posture.

In addition to the above, at the same time as the seat 3 changes to the horizontal posture, the arm member 7a acts so that the footrest 4 is positioned substantially on the extension of the seat 3. That is, when the backrest 2 tilts backward, the lower end of the arm member 7a moves circularly, and the link member 10 operates obliquely upward. Due to the movement of the link member 10, the footrest 4 rotates about the front edge 3a of the seat 3 as a center of rotation, and changes its position upward. When the backrest 2 is tilted rearward as much as possible, as shown in FIG. 4, the backrest 2 is located on the front extension of the seat 3 with the front edge slightly elevated.

The present invention is not limited to the embodiment described above. For example, a combination of a normal coil spring and a ratchet hinge that can be unlocked by the operation lever 6 for locking the backrest 2 may be used as the posture changing unit 11. In this case, the coil spring may be disposed between the lower end of the back support rod 2a and the rear leg member 1b.

In addition, the configuration of each section is not limited to the illustrated example, and various modifications can be made without departing from the spirit of the present invention.

[0018]

As described in detail above, according to the present invention, when the backrest is reclined, the seat changes its angle in the forward tilt direction while moving forward, so that the seat becomes substantially horizontal. When used as a chair, there is no portion for lifting the thighs, the legs can be extended sufficiently, and the sitting comfort when reclining is improved.
Further, when the backrest is reclined, the seat simultaneously moves forward and changes the angle in the forward tilt direction, so that the backrest can be easily reclined by leaning the backrest of the entire body of the user in the sitting state.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a side view of the embodiment.

FIG. 3 is a side view showing the frame structure of the embodiment when the backrest is not tilted backward.

FIG. 4 is a side view showing the frame structure of the embodiment when the backrest is tilted backward.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Leg 2 ... Backrest 2a ... Back support rod 2m ... Intermediate part of back support rod 2a 3 ... Seat 3a ... Front edge of seat 3 3b ... Base end 4 ... Footrest 10 ... Link member 11 ... Posture changing means P ... Shaft fulcrum

Claims (4)

(57) [Claims] 1. A leg placed on the floor, a backrest attached to the leg so as to be tiltable about an intermediate portion of the back support rod as a pivot point, and a base end pivotally attached to a back support rod below the pivot support point. And a posture changing means for movably connecting the seat to the leg and changing the seat from the inclined posture to a substantially horizontal posture when the backrest is tilted backward, and rotatably attached to the front edge of the seat. A link member for positioning the footrest on a substantially extension of the seat when the footrest is pivotally attached to the lower end of the back support rod and the front end is pivotally attached to the lower surface of the footrest and the backrest is tilted backward; A reclining chair, comprising: 2. A posture changing means comprising: a second link member having one end pivotally mounted on a leg and the other end pivotally mounted near a front portion of the seat; and a lower end of the back support rod. 2. The reclining chair according to claim 1, further comprising a spring member attached between the vicinity and the leg, for urging the backrest to fall forward. 3. The reclining chair according to claim 2, wherein the spring member is a gas spring. 4. The reclining chair according to claim 2, wherein the second link member is pivotally mounted on the leg with a slight forward tilt in a posture before the backrest is tilted rearward.