JPS6057331B2 - Reclining chair fall prevention device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for preventing a reclining chair from falling.

Conventional reclining chairs have the disadvantage that when the chair back is tilted significantly backwards, the front end of the chair cushion is lifted around the bottom of the rear end as the center of rotation, making the chair cushion unstable and therefore preventing the reclining angle from increasing. Moreover, when the legs projecting rearward are set in advance, the legs have the disadvantage of getting in the way.

An object of the present invention is to provide a device for preventing the reclining chair from collapsing, which eliminates the drawbacks of the conventional reclining chair and can increase the reclining angle. Dew.

1 and 2 show an embodiment of the present invention, which includes a reclining chair 1 (equipped with a chair cushion 2, a chair back 3, and a device lock mechanism 4, in which the chair back 3 has a device lock mechanism 4). It is designed to be reclined in a range from an upright state shown by a solid line in FIG. 1 to a substantially horizontal state shown by a phantom line, and held at an arbitrary rotation angle.

A chair back receiving frame 5 with casters 9 is installed at the bottom of the chair cushion 2 so as to be slidable in the front and rear directions.

The chair back receiving frame 5 includes an upper member 6 which has a chair back receiving portion 6' shaped into a convex arc and is long in the front and back direction and is disposed on both sides of the chair cushion 2.
A vertical member 7 extending downward from the rear end and a lower member 8 connecting the lower ends of both vertical members 7 are integrally formed, and the casters 9 are attached to the lower member 8. The chair back 3 and the chair back receiving frame 5
are connected via a link mechanism that converts rotational motion into linear motion.

The embodiment of the link mechanism shown in FIG. The guide member 18 has an elongated hole 19 extending in the front-rear direction and is attached to the upper surface of each upper member 6 of the chair bag receiving frame 5. Each rotation axis 11 is
The tip 1" is bent inward and is L when viewed from the front.
It is formed in a letter shape and is attached to the rear end side of the bottom of the chair bag 3 near both ends of the chair bag 3 in the width direction. The pivot shaft 12 is inserted into an elongated hole 19 of a guide member 18 attached to each upper member 6 of the chair bag receiving frame 5, and both ends of the pivot shaft 12 are attached to the fixing member 10. Each lever 13 is supported by the pivot shaft 12 at an approximately intermediate portion thereof in the length direction, and is engaged with the tip end portion 1V of the rotation shaft 11 through an elongated hole 14 formed in one half of the length direction. are combined. Each link 15 is connected at one end to the other end of the lever 13 through a pin 16, and at the other end to the vertical member 7 of the chair bag receiving frame 5 through another pin 17. The apparatus for preventing the reclining chair from falling according to the embodiment described above operates as follows.

When the chair back 3 of the reclining chair 1 is in the upright position shown in solid lines in FIG. 1, the chair back receiving frame 5 is retracted below the chair action 2.

Then, when the device lock mechanism 4 is operated and the chair bag 3 is tilted backward from the state shown by the solid line in FIG. 1, the chair bag receiving frame 5 moves as follows through the link mechanism that converts rotational motion into linear motion. Be manipulated.

That is, when the chair bag 3 rotates clockwise as shown by the arrow a in FIG. Each lever 13 is rotated counterclockwise about the pivot shaft 12 by the tip 11'' of the rotation shaft 11 as shown by arrow b in FIG. The links 15 are pushed toward the rear of the chair action 2 as shown by arrow c in FIG. Move operation is performed.

At this time, the chair bag receiving frame 5 is guided by the elongated hole 19 of the guide member 18 into which the pivot shaft 12 is inserted, and moves on a horizontal plane, and is smoothly moved by the casters 9. As a result, the chair action 2 is supported by the chair back support frame 5, which has been moved to a position far behind the chair action 2, as described above, and therefore, the seated person is placed on the side of the tilted chair back 3. The chair action 2 can be stably supported even when the body weight is applied, and the problem of lifting the front end side of the chair action 2 is eliminated.

Next, when the chair back 3 is tilted almost horizontally as shown by the imaginary line in FIG. move,
Not only can lifting of the chair back 2 be prevented, but in this state, the back of the chair back 3 comes into contact with and is supported on the chair back receiving part 6'' formed in a convex arc on the upper member 6 of the chair back receiving frame 5, so that the chair back 3 can be prevented from lifting up. The reclining chair can be used stably by tilting it horizontally.

Furthermore, when the chair bag 3 is tilted horizontally as described above, the chair action 2 and the chair bag 3 are connected on almost the same plane and are strongly supported by the chair bag receiving frame 5, so that the chair bag can be used as a stable cot. can do. On the other hand, when the chair bag 3 is raised from the horizontal position, the chair bag receiving frame 5 moves forward of the chair action 2 via a link mechanism that converts rotational motion into linear motion. During the process of raising the chair back 3 from the horizontal state to the upright state, the device locking mechanism 4 can be operated to set the chair bag 3 to any desired tilting angle. Lifting can be prevented.

Note that, in the present invention, the mechanism for converting rotational motion into linear motion is not limited to the one in the illustrated embodiment; the point is that when the chairbag 3 is tilted, the chairback receiving frame 5 is moved from the chairback receiving frame 5 to the chairaction 2 in accordance with the tilting angle. Any structure that allows movement to the rear of the camera may be used.

The above is the configuration of an embodiment of the reclining chair collapse prevention device according to the present invention. According to this configuration, a chair back receiving frame is provided, and a link between the chair back and the chair back receiving frame converts rotational motion into linear motion. They are connected via a mechanism, and when the chair bag is tilted backwards, the chair bag receiving frame moves toward the rear of the chair action in accordance with the tilt angle, and this prevents the front end of the chair bag from lifting up, allowing the chair bag to stand upright. It has the effect of allowing the chair bag to be tilted at a large tilt angle from the horizontal position to the horizontal position, allowing it to be used as a stable chair.In addition, when the chair bag is not tilted backwards, the chair bag receiving frame is stored below the chair action. It doesn't get in the way. It should be noted that the above description merely shows one embodiment of the present invention, and it will be obvious that various modifications and changes can be made without departing from the spirit of the present invention.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention,
FIG. 1 is a side view, and FIG. 2 is an enlarged perspective view. In the figure, 1... reclining chair, 2...
...Cheer action, 3...Cheer back, 4...Device lock mechanism, 5...
Chair bag receiving frame, 11... Rotation axis of link mechanism that converts rotational motion into linear motion, 12...
...Pivot axis, 13...Luv, 15...
Links, 16, 17...pins that connect links,
18... Guide member.

Claims (1)

[Claims] 1. A chair back receiving frame is installed at the lower part of the chair cushion so as to be slidable in the front and back direction, and the chair back and the chair back receiving frame are arranged to correspond to the rearward inclination angle of the chair back. A toppling prevention device for a reclining chair, characterized in that the device is connected via a link mechanism that converts a rotational motion capable of moving a chair back support frame to the rear of a chair cushion into a linear motion. 2. The link mechanism that converts the rotational motion into linear motion is
A rotating shaft attached to the bottom of the chair back, a fixed pivot shaft, and a lever supported to be rotatable about the pivot shaft and having one end engaged with the pivot shaft. and a link pinned to the chair back receiving frame and the other end of the lever.