JPS6015473Y2 - front and back rocking chair - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a rocking chair that can be rocked both forward and backward.

(Prior Art) Rocking chairs that can be rocked only in the front or only in the rear are known.

A chair that can be rocked forward is convenient because it allows you to lean forward when doing tasks such as typewriting, and a chair that can be rocked backwards is convenient for you to stretch out while sitting and relieve fatigue from work. can.

In the case of these conventional examples, since the locking direction is only the front or only the rear, the above-mentioned usage modes cannot be adopted, and the locking direction is the lower part.

(Problems to be solved by the invention) In view of the above-mentioned problems, the present invention is capable of locking in both the front and rear directions, which not only improves workability by leaning forward, but also provides a comfortable feeling like a ``cradle'' by swinging back and forth. The idea is to provide a rocking chair.

(Means for solving the problem) In the front-rear rocking chair according to the present invention, the seat is pivotably supported by a base supported via a shaft so that it can rotate in the front-rear direction, and the seat rotates together with the seat toward the lower front. a movable front arm;
A rear arm that can rotate toward the rear and lower part of the seat together with the seat is pivotally supported on both left and right sides of the seat and is equipped with a stopper that prevents rotation in the opposite direction. One torsion bar for applying return forces in opposite directions is inserted at both ends into the respective support tubes and fixed to each support tube, and the front arm and the rear arm have respective torsion bars. It is characterized in that the torsion bar is attached via a support tube.

(Example) Hereinafter, an example of the front and rear rocking chair according to the present invention will be described with reference to the drawings.

. In Figures 1 to 4, 1 is a shaft, 2 is a leg attached to the lower end of the shaft 1, 3 is a pedestal attached to the upper end of the shaft 1, and 4 is rotatable in the front and back direction by the pedestal 3. 10 is a seat on the seat 4.

5 is a front arm that can be rotated forward and downward together with the seat;
Reference numeral 6 denotes a rear arm 6 that is rotatable toward the rear and lower part together with the seat portion 4.

The front arm 5 and the rear arm 6 are each provided with a stopper 7.8 for preventing rotation in the opposite direction, and are pivotally supported at both left and right ends of the seat 3. The arm 6 is provided with a torsion bar 9 that applies return forces in opposite directions.
is installed.

To explain the relative relationship of each of the above members in detail with reference to FIGS. 2 to 4, both ends of the torsion bar 9 are inserted into the left and right support tubes 11 and 12 and fixed to each part 11 and 12. These support tubes 11.12 pass through the brackets 3a and 3b on both sides of the seat 3 and the walls 4a and 4b on both sides of the seat 4, and are connected to the seat 3 through bearings 13.14. It is provided so as to be rotatable relative to the seat portion 4.

That is, the torsion bar 9 has support tubes 11.1 at both ends thereof.
2 and penetrates through each of the above parts.

In this configuration, the front arm 5 is attached to the outer periphery of the support tube 12, the rear arm 6 is attached to the outer periphery of the support tube 11, and thus the torsion bar 9 is attached to the front arm 5 and the rear arm 6.

As shown in FIG. 3, the stopper 8 of the front arm 5 has a handle 8a at its lower end, a threaded portion 8b at its upper end, and a flange 8c at its longitudinal midpoint. 3C% passes through the front arm 5 and the hole 5a.

In this penetrating state, the flange 8C of the stopper 8 is in contact with the back surface of the seat 3, and the nut 8d is screwed into the threaded portion 8b of the stopper 8 that protrudes upward from the hole 5a. comes into contact with a receiving portion 15 on the back surface of the seat tube 4.

As shown in FIGS. 2 and 4, the stopper 7 of the rear arm 6 is formed by a protrusion projecting from the side wall 3a of the seat 3.
The front end side of the rear arm 6 collides with this stopper 7, and the rear end side of the rear arm 6 comes into contact with the back surface of the seat portion 4.

In the above embodiment, when no load is applied that causes the seat 10 to tilt forward or backward, the front arm 5, the rear arm 6,
The seat portion 4 and the like maintain the solid line state shown in the figure, and no torsional force is applied to the torsion bar 9.

When a load due to body weight is applied to the front side of the seat 10 and the seat 4 tilts forward as shown in the imaginary line in FIG. 3, the stopper 8 is pushed down by the receiving part 15 of the seat 4, and the front arm 5 8d, the seat portion 10 also rotates in the same direction as it rotates downward in the front direction against the torsion bar 9.

Due to the forward tilt at this time, the torsion bar 9 is twisted, and a force is accumulated in the direction of returning the seat 10 etc. to the neutral position.

When a load is applied to the rear side of the seat 10 and the seat 4 tilts backward as shown in the imaginary line in FIG.
The rear arm 6 rotates rearwardly and downwardly against the torsion bar 9, and the seat portion 1o rotates in the same direction.

The torsion bar 9 is also twisted during this backward tilting, thereby accumulating a force in the direction of returning the seat 10 and the like to the neutral position.

Note that when either the front arm 5 or the rear arm 6 rotates, no load is applied to the other arm, so the other arm does not rotate.

The screwing length of the stopper 8 into the nut 8d can be adjusted, so that the return force can be freely adjusted via the torsion bar 9.

(Function and Effect) As explained above, the front-rear rocking chair according to the present invention can be applied to work in a forward-leaning position, as well as the front-rear rocking chair, since the seat supporting the seat can swing in either the front or back direction. By swinging to the ``cradle J'' type of use, you can experience a sense of comfort not found in conventional products.

Moreover, the front arm and rear arm are applied with a return force in a predetermined direction via the torsion bar, and the seat returns independently from the front-rear neutral position to the front and rear, respectively, so it can rotate in either direction. Even in such a case, the seat properly returns to maintain a neutral position, and therefore, even though it is possible to lock the seat in the front-rear direction, a stable feeling of use can be obtained without returning more than necessary.

[Brief explanation of the drawing]

Figure 1 is a side view of the front and back rocking chair according to the present invention.
Figure 2 is a cross-sectional plan view of the same chair, Figure 3 is Figure 2 ■-■
4 is a sectional view taken along line IV--■ in FIG. 2. 1... Axis, 3... Base, 4...
・Seat, 5... Front arm, 6... Rear arm, 7° 8... Stopper, 9... Torsion bar, 11° 12. ...Support pipe.

Claims (1)

[Scope of utility model registration request] A front arm is pivotally supported by a seat supported via a shaft so as to be rotatable in the front-rear direction, and a front arm is rotatable toward the lower front together with the seat, and a rear arm is rotatable toward the lower rear together with the seat. is equipped with a stopper that prevents rotation in the opposite direction, and is pivotally supported on both the left and right ends of the base, and a single piece is provided to apply return forces in opposite directions to the front and rear arms. Both ends of the torsion bar are inserted into the respective support tubes and fixed to each other, and contact torsion bars are attached to the front arm and the rear arm through the support tubes. Front and rear rocking chairs.