JPS6239734Y2 - - Google Patents

Description

[Detailed description of the invention] Conventionally, in a chair, especially a massage chair, a seat on which the user sits and a backrest on which the user's back rests are connected in a relationship with each other, so that the user can rest on his or her back. There is a chair in which the backrest is pushed and tilted in a reclining manner, so that the seat extends and moves approximately horizontally in front of the main body of the chair.

However, in the conventional seat and backrest interlocking type of this type, the switching from the normal state to the overhanging tilting position is only possible in two stages, front and back, so it is difficult to adjust the overhanging tilting position desired by the user. There was a problem that I couldn't get it.

The present invention focuses on the above-mentioned difficulties and attempts to provide an easy chair or massage chair in which the seat and backrest can be changed steplessly to the user's desired overhanging and tilting posture.

An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a chair body, which has a base 2 and left and right side frames 3, 3. Reference numeral 4 denotes a seat, with guide rollers 5, 5 being pivotally supported on the left and right sides thereof, which are slid onto U-shaped guide rails 6, 6 fixed to the insides of the side frames 3, 3, so that the seat 4 can be mounted. It extends in the front of the chair body 1 in a substantially horizontal direction so that it can be moved. 7 is the back support stand, and the left and right side frames 3, 3
It is pivotably mounted to pivots 8, 8 at the rear upper position of the side frame between them. A pair of band-shaped support brackets 9, 9 fixed to the left and right sides of the seat 4 and extension pieces 10, 10 at the bottom of the backrest 7 are pivotally connected by detachable fittings 11, 11 such as bolts and nuts. By doing so, the seat base 4 is moved in conjunction with the tilting of the backrest base 7, and the seat base 4 is moved to protrude in front of the chair body 1. When not in use, the second seat base 4 can be moved by removing the detachable fittings 11, 11. As shown by the chain line in the figure, the back rest 7 can be folded between the side frames 3, 3 by rotating the pivots 8, 8 as fulcrums.

Further, a groove-shaped friction rail 12 is fixed to the base 2 of the chair body 1 in the moving direction of the seat 4, and a band-shaped friction plate 13 is slidable within the friction rail 12 along its friction surface 12'. Further, an eccentric cam 15 which is supported on the friction rail 12 by an eccentric shaft 14 comes into contact with the friction plate 13, and an operating lever such as an operating lever (operating button) is connected to one end of the eccentric shaft 14. 16 is fixed, a tension spring 17 is attached to one end of the operating rod 16, and the eccentric cam 15 is rotated by rotating the operating rod 16 to the solid line position in FIG.
is separated from the top of the friction plate 13, but is normally pulled by the tension spring 17 to press the eccentric cam 15 onto the friction plate 13.

Furthermore, a guide pin 18 is attached to the rising piece 13' at one end of the friction plate 13, and the guide pin 18 is fitted into guide grooves 19, 19 provided on both side pieces of the friction rail 12.
One end of a connecting rod 20 is pivotally attached to the seat 4, and the other end is pivotally attached to a connecting fitting 21 fixed to the seat 4, so that the friction plate 13 slides on the friction rail 12 as the seat 4 extends.

Furthermore, a return spring 22 is interposed and connected between the seat base 4 and the chair body 1, and is pulled by the return spring 22 to change the seat base 4 from the extended position (the back support base 7 is tilted) to the storage position. It will automatically return to .

The present invention has the above-mentioned structure, and when the user changes the sitting position 4 from the stored position and the backrest 7 from the vertical position to an extended and tilted position, the operating rod 1 is used.
6 to the position shown by the solid line in FIG. 3, the eccentric cam 15 is removed from the friction plate 13. In this state, the back rest 7 is pressed and tilted, and then the operating rod 16 is returned to its original position. By pulling back
The eccentric cam 15 presses the friction plate 13, and this pressing force causes the friction plate 13 to move against the friction rail 1.
2 and thus maintain the seat 4 connected to the friction plate 13 via the connecting rod 20 in a desired extended state, and also tilt the back support 7 connected and interlocked to the seat 4 as desired. It will be kept in the state.

In order to return to the normal state from this overhanging and tilting position, the operating rod 16 is rotated and the eccentric cam 1 is rotated.
By releasing the pressing force on the friction plate 13 of 5, the friction rail 1 of the friction plate 13 is released.
Since the frictional engagement force against 2 is released, the seat 4
The backrest 7 is pulled by the return spring 22 and automatically returns.

Therefore, according to the present invention, the friction plate 13 is slidably fitted to the friction rail 12 provided on the chair body 1, and the friction rail 12 of the friction plate 13 is moved by the eccentric cam 15 that presses the friction plate 13. Since the frictional engagement position can be freely adjusted, the protrusion and tilting positions of the seat 4 pivotally connected to the friction plate 13 and the back rest 7 connected and interlocked thereto can be adjusted as desired by the user. It can be adjusted steplessly to any position, making it perfectly suitable as a massage chair or easy chair.
Moreover, since the operating rod 16 is normally equipped with a tension spring 17 that presses the eccentric cam 15 onto the friction plate 13, once the seat base 4 and the backrest base 7 are adjusted to the desired extended and tilted state. After that, the more the user's weight is applied to the backrest 7, the more easily the eccentric cam 15 bites into the friction plate 13, which has the effect of maintaining its adjusted position even more firmly.

Further, according to the present invention, the support bracket 9 provided on the seat base 4 and the extension piece 10 protruding from the back rest base 7 are provided.
Since these are removably pivotally connected by the detachable fitting 11, the backrest 7 can be folded into the chair body 1 by removing the detachable fitting 11.
It does not take up much bulk during transportation and storage.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view showing an embodiment of the present invention;
FIG. 2 is a front view showing the internal structure, FIG. 3 is a front view showing the operating state, and FIG. 4 is a perspective view showing the internal structure. 1... Chair body, 4... Stool, 7... Back rest, 9... Support bracket, 10... Extension piece,
11...Detachable fitting, 12...Friction rail, 13...
...Friction plate, 14...Eccentric shaft, 15...Eccentric cam, 16...Operation rod, 17...Tension spring, 20
...Running, 22...Return spring.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A seat base mounted on the chair body so as to be able to extend freely in a substantially horizontal direction, and a backrest pivotally attached to the chair body so as to be tiltable in conjunction with the seat base. In the chair, a friction plate is slidably fitted to a friction rail provided on the chair body, and an eccentric cam that presses the friction plate to the friction rail in a detachable manner is pivotally supported, and the eccentric shaft of the eccentric cam is operated. A tension spring is attached to the operating rod to connect the rod and normally press and bias the eccentric cam onto the friction plate, and the friction plate and the seat are pivotally supported via the connecting rod. Connected chairs, especially massage chairs. 2. A chair, particularly a massaging chair, as claimed in claim 1, which is a registered utility model, and includes a return spring interposed and connected between the seat and the chair body to resist the protruding movement of the seat. 3. A chair according to claim 1, in which a support bracket provided on the seat and an extension piece protruding from the backrest are removably pivotally connected by a detachable fitting, particularly Massage chair.