JPS5936537B2 - chairs, especially massage chairs - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Chairs, particularly massage chairs, have heretofore been provided with so-called footrests on which the user's calves and thighs are placed, extending out from the front of the chair body.

In this case, it is common to have the footrest extended all the time (and to avoid high tension, it is stored vertically along the front of the chair body when not in use, and can be extended horizontally only when in use. In order to extend or retract the footrest, the footrest was operated by an operating rod that protruded from the chair body through a series of link structures.

This allows the user to operate the operating rod one by one.
Accordingly, the feet must be placed on the footrest, which makes the timing of the operation quite difficult, and furthermore, the operating rod is exposed to the outside from the chair body, making the appearance undesirable.

In view of the above-mentioned difficulties, the present invention enables the backrest at the rear of the chair body to be rotated, and also automatically operates the rotation of the backrest and the extension of the footrest in relation to each other. This eliminates the troublesome operation of the operating rod, improves the appearance of the chair, and allows the user to easily take a supine position even with a small chair in its extended state. It is something.

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.

4 is a pair of reinforcing aggregates that extend from the base 2 to the side frames 3 and are fixed to both side frames 3.3.
The reinforcing aggregate 4 supports a footrest 5, a seat 6, and a backrest 7, as will be described later.

Reference numeral 8 denotes a pair of support brackets which are fixed to the reinforcing aggregate 4 integral with the chair body 1 with bolts or welding 9 and extend bent in a substantially horizontal direction on the inner (back) side of both side frames 3, and are used to hold iron plates etc. in a band shape. The front end thereof is bent upward, and the rear end thereof is bent downward.

Reference numeral 10 denotes a swing link which is located above the support bracket 8 and whose seat is integrally fixed to the stand 8 with screws 11.As will be described later, the link 10, that is, the seat is substantially parallel to the support bracket 8. (slightly downward to the right in the figure).

The main operating link 12 bent in a substantially doglegged shape near the front end of the support bracket 8 is pivoted in a substantially X shape by a pivot pin 13a, and the support bracket 8 is bent upward from the pivot point 13a at the front end. The main operating link 1 is attached to the end 8a.
A sub-operation link 14 is pivotally supported by a pin 13b substantially parallel to the footrest 5, and a response link 15 and a driven link 16 are supported by pins 13c and 13 on the back side of the footrest 5 in parallel with each other.
The response link 15 is pivoted to the sub-operating link 14 in an X-shape by a pin 13e, and its free end is pivotally connected to the lower end of the main drive link 12 by a pin 13f. The free end is pivotally connected to the lower end of the sub-operating link 14 by a pin 13g, and these main operating links 1
2. A series of expandable and retractable pantograph fluff link mechanisms are constituted by the auxiliary operating link 14, the responsive link 15, and the driven link 16.

The upper end of the main operating link 12 is pivotally connected to the front end of the swing link 10 by a pin 13h, and the seat extends integrally from the base 6 to the back support base 7. Auxiliary link 18 fixed to back rest 7 with screw 17
A pin 13i is pivoted to the pin 13i, and a pin 13j is pivoted to the downwardly bent end 8b of the support bracket 8 to the lower end of the auxiliary link 18, and the distance between the pins 13h and 13i is
It is set longer than the distance between 3j.

The support bracket 8, the swing link 10, the main operating link 12, and the auxiliary link 18 constitute a four-speed link mechanism having a substantially inverted ladder shape with the support bracket 8 as a fixed position link.

That is, the footrest 5 is movably supported by the pantograph mechanism connected to the support bracket 8, and the seat is movably supported by the footrest 5.
and the backrest 7 are movably supported by the four-speed link mechanism connected to the support bracket 8.

Further, a stepped portion 19 is formed at the upwardly bent end 8a of the support bracket 8 on the side of the footrest 5, so that the footrest 5 can be vertically aligned along the front surface of the chair body 1 as shown in FIG. When stored, the front end 10a of the swing link 10 is aligned with the stepped portion 1.
9 to prevent further movement of the footrest 5, and to play the role of a regulating stopper for storing the footrest 5 in a fixed position.

Furthermore, an upwardly bent extension 20 is provided to project from the downwardly bent end 8b of the support bracket 8, which is the end on the side of the backrest 7, so that the backrest 7 swings when the backrest 7 is tilted backwards as much as possible, as shown in FIG. The rear end portion 10b of the dynamic link 10 is connected to the upwardly bent extension portion 20.
It hits the back support base 1 to prevent further rotation of the back support base 1, and serves as a regulating stopper for holding the back support base 7 in a fixed position.

Furthermore, a tension spring 21 is interposed and connected between the support bracket 8 and the swing link 10, and as shown in FIG. Alternatively, the tension spring 21 is made to bear an auxiliary force during storage and upright operation.

Further, a drive link driven by a motor is connected to the series of link mechanisms.

That is, as shown in FIGS. 3 and 4, a long bolt 25 is mounted on the base 2 using mounting brackets 23 and 24, a nut 26 is screwed onto the long bolt 25, and the nut 26 is connected to the response link. 15 are connected by two drive links 27 and 27 with a pivot pin 33, and the rotational force of the reversible motor 28 is transmitted to the long bolt 25 via the belt 29 and pulley 30, and the rotation of the bolt 25 causes the nut to tighten. 26 is reciprocated back and forth, and drive links 27, 27 connected thereto reciprocate the response link 15 as shown in FIG. 1 or 2.

Note that 31 is a limit switch for contraction, and 32 is a limit switch for extension.

Therefore, when the motor 28 is driven in the state shown in FIG.
The drive link 27 connected to 6 presses the response link 15, and the pantograph link mechanism composed of the response link 15, the main operation link 12, the auxiliary operation link 14, and the driven link 16 moves around the pivot points 13a and 13b. The main operating link 12, which is pivotally connected to the response link 15, rotates around the pivot point 13a, thereby extending the footrest 5 forward as shown in FIG. That is, the seat presses the table 6 in the direction of arrow a in FIG. Rotate the center back and the nut 26 is the limit switch 3.
1, the motor 28 is stopped, and the footrest 5 and the back rest 7 are reliably held in the extended and rotated position as shown in FIG.

Incidentally, as the swing link 10 moves, the tension spring 21 assists the movement of the swing link 10 by the tensile force from the time when the tension spring 21 exceeds the tension dead center 22, thereby reducing the load on the motor 28.

Further, by reversing the motor 28 from the state shown in FIG. The connected swing link 10, that is, the seat 6 is moved toward the left in the figure (arrow b
), and with the help of the tension spring 21, the back support base 7
The footrest 5 is returned to an upright position, and the footrest 5 is stored in a vertical position along the front of the chair body 1. When the nut 26 comes into contact with the limit switch 32, the motor 28 is stopped, and the footrest 5 and the back rest are The stand 7 will be stored and maintained in an upright position.

As described above, according to the present invention, the seat is moved by a four-speed link mechanism having a substantially inverted ladder shape with the support bracket 8 fixed in the substantially horizontal direction of the chair main body IK as a fixed position link. The base 6 and the back rest base 7 are movably supported, and a pantograph link mechanism is connected to the support bracket 8, and the footrest 5 is movably supported by the pantograph link mechanism. are connected to each other through the support bracket 8, so the force of the footrest 5 is automatically extended forward by simply rotating the backrest 7, and there is no need to operate the operating rod as in the conventional case. It is convenient and easy to use, making it suitable as a chair, especially as a massage chair, and also has a good appearance.

Further, the sub-operation link 14 is pivotally supported at the front end of the support bracket 8, only the main operation link 12 is connected to the seat 6, and the seat is connected to the base by a four-speed link mechanism in which the support bracket 8 is a fixed position link. 6 and the backrest 7 are movably supported, so in the extended state (the state shown in Fig. 2), the footrest 5
Since the seat 6 extends forward and the seat 6 moves backward, the horizontal length can be increased accordingly. It can be done.

゛Especially, since the four-speed link mechanism has a substantially inverted ladder shape,
In the extended state, the table 6 of the seat is slightly downwardly inclined toward the rear, which matches the body shape of the user and allows the user to take a supine position more easily.At the same time, the horizontal length of the user in the supine position Since it is shorter, it has the effect of requiring a smaller floor area in the extended state.

Furthermore, if these series of link mechanisms are automatically operated by the drive link 27, it is possible to eliminate the need for human power by
Can be dynamically driven or remotely controlled.

Further, by interposing the tension spring 2 between the swing link 10 and the support bracket 8, the chair can be operated very smoothly and easily from the normal state to the extended state and vice versa.

[Brief explanation of the drawing]

FIG. 1 is a vertical side view showing a normal state of a chair according to an embodiment of the present invention, FIG. 2 is a vertical side view showing the chair in an extended state, FIG. 3 is a side view of the main parts, and FIG. FIG. 1...Chair body, 5...Foot rest, 6...Seat is a stand, 7...Back rest, 8...Support bracket, 10
...Owing link, 12...Main operation link, 14...
- Width operation link, 15... Response link, 16... Driven link, 21... Tension spring, 27... Driving link.

Claims (1)

[Claims] 1. In a chair equipped with a footrest that extends in a substantially horizontal direction in front of the chair body and is stored vertically along the front surface of the chair body, a support bracket is provided in a substantially horizontal direction on the chair body. At the same time, a swinging link that swings in a substantially horizontal direction along the support bracket above the support bracket is fixed to the base, and is pivoted to the support bracket in a substantially X-shape as a main operating link. At the same time, a sub-operating link is pivotally supported on the support bracket at a front end further from the pivot point substantially parallel to the main operating link, and these main operating links and auxiliary operating links are respectively pivoted parallel to the footrest. A response link and a driven link are pivotally connected to each other in a pantograph shape, and the upper end of the main operating link is pivotally supported to the swing link, and the seat extends integrally from the base to the white side of the backrest. By pivotally connecting the loose fitting part of the swinging link and the rear end of the support bracket to the back rest, the support bracket is used as a fixed position link, and the swing link, the main operating link, and the back rest are connected to each other. A chair, especially a massage chair, constructed of a four-speed link mechanism having a substantially inverse ladder shape. 2. A chair, particularly a massaging chair, according to claim 1, wherein the footrest, the seat, and the backrest are driven and supported in relation to each other via a drive link connected to the series of link mechanisms. . 3. A chair, particularly a massage chair, according to claim 1 or 2, wherein a tension spring is interposed between the swing link and the support bracket.