JPS5817496Y2 - Chair - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a chair in which the inclination angle of the backrest and footrest can be adjusted.

2. Description of the Related Art Generally, chairs are known in which the inclination angle of a backrest can be automatically moved and adjusted by a drive motor.

However, in conventional chairs like this, when adjusting the inclination angle by raising or lowering the backrest, the drive motor must be reversed when raising or lowering the backrest after it has been reclined. For this purpose, limit switches and other control devices must be provided, resulting in a complicated structure, resulting in high costs and troublesome operation.

Furthermore, a geared motor is used as the drive motor, and the rotation speed of the output shaft of this geared motor is set to be relatively low in order to swing the backrest, so its torque is quite large, and the gear of the geared motor is There was a risk of damage due to excessive force.

This idea was made in view of the above circumstances, and provides a chair that does not require reversing the drive motor, has a simple structure, is inexpensive, has good operability, and is free from the risk of breakage. The purpose is to

An embodiment of this invention will be described below based on the drawings.

Reference numeral 1 in FIG. 1 is a base, and casters 2 are attached to the lower part of the base 1.

Further, a seat 3 is provided on the upper part of the base 1.

This seat 3 is constructed by providing a base frame 4 with an outer skin 5 such as synthetic leather or a synthetic resin sheet, and further embedding a padding such as foam rubber or hair lock inside the outer skin 5.

Further, a magnetizer 6 capable of performing magnetic pine surge is buried inside the seat 3.

Further, a hinge 7 is provided on one side of the base frame 4, and a backrest 8 is attached to this hinge 7, and this backrest 8 can swing around a hinge pin 9.

The backrest 8 is constructed in substantially the same manner as the seat 3, and magnetizers 10, 11, and 12 are embedded therein.

Further, a connecting member 14 is provided at the end of the base frame 13 of the backrest 8 on the hinge 7 side.

Further, a hinge 15 is provided on the other side of the base frame 4, a footrest 16 is attached to this hinge 15, and this footrest 16 is attached to this hinge 15.
6 is able to swing around a hinge pin 17.

The footrest 16 is constructed in substantially the same manner as the seat 3, and has a magnetizer 18 embedded therein.

Additionally, a connecting member 20 is provided near the end of the base frame 19 of the footrest 16 on the hinge 15 side.

Further, a guard motor 21 is attached to the lower part of the base frame 4 of the seat 3.

A friction clutch 23 is attached to the shaft 22 of this geared motor 21.
is installed.

The friction clutch 23 consists of a wheel 24, a rubber disk 25 embedded in the wheel 24, and a wheel 26, and the wheel 24 is fixed to the shaft 22 via a key 27.

Further, the rubber discs 25 are buried in six equal parts of the circumference on one side of the wheel 24 with the majority of their thickness protruding.

Further, the wheel 26 is provided with a coupling shaft 28 on one side thereof, which is fitted into the shaft 22, and further includes a rubber disc 25.
Washer 2 with the other side in contact with...
The bolt 30 is fastened to the shaft 22 via the bolt 9.

One end of a connecting rod 31 for transmitting the force of the geared motor 21 to the backrest 8 is rotatably attached to the connecting shaft 28, and is prevented from being removed by a snap ring 32.

The other end of the connecting rod 31 is rotatably attached to the connecting member 14.

Further, one end of a connecting rod 33 for interlocking the backrest 8 and the footrest 16 is rotatably attached to the mounting member 14, and the other end of the connecting rod 33 is rotatably attached to the connecting member 20.

The connecting rod 33 is constructed as shown in FIG.

That is, a mounting member 35 is provided at one end of the cylindrical body 34, a spring 36 is telescopically fitted into the cylindrical body 34, and a bolt 37 is screwed into the side wall of the cylindrical body 34.

Further, a pressing body 39 is provided at one end of another cylindrical body 38, a mounting member 40 is provided at the other end, and a long hole 41 is provided in the side wall.

Further, a cylindrical body 38 is slidably fitted into the cylindrical body 34, and a bolt 37 is inserted into the elongated hole 41, so that the connecting rod 33 can be freely expanded and contracted.

When using the chair configured as described above, first sit on the seat 3, place your feet on the footrest 16, and lean your back against the backrest 8.

When it is desired to adjust the inclination angle of the backrest 8 and the footrest 16, a switch (not shown) is turned on, and the guard motor 21 and wheel 24 rotate in the direction of arrow A in FIG.

Then, the wheel 24 passes through the rubber disc 25...
The rotation of the wheel 26 is transmitted to the wheel 26, which rotates in the direction of arrow A, and further rotates the connecting rod 31. The backrest 8 swings about the hinge pin 9 in the directions of arrows B and C via the connecting member 14.

At the same time, the footrest 16 swings in the E direction about the hinge pin 17 via the connecting rods 31, 33 and the connecting member 20.

Therefore, if the switch is turned off when the backrest 8 or the footrest 16 reaches a desired inclination angle position, the backrest 8 and the footrest 16 will stop at that position.

Furthermore, if you wish to readjust the inclination angle of the backrest 8 and the footrest 16, by repeatedly turning the switch ON and OFF, the backrest 8 and the footrest 16 will operate in the same manner as described above. It is possible to readjust the footrest 16 to the desired inclination angle.

At this time, the geared motor 21 can be rotated in the same direction any number of times to adjust the inclination angle, and there is no need to rotate it in the opposite direction.

Note that when the geared motor 21 is about to be overloaded, the wheel 26 of the clutch 23 slips on the contact surface with the rubber discs 25 .

As a result, the geared motor 21 is not overloaded.

Then, when the load applied to the geared motor 21 decreases, the wheel 2 is automatically
4.26 rotates in conjunction and returns to its original state.

Further, for example, when a child is placed on the footrest 16, the cylindrical body 38 slides in the direction of arrow F with respect to the cylindrical body 34, and the pressing body 39 presses the spring 36 against the force of the spring 36. .

As a result, the impact load that would otherwise be applied to the gear motor 21 and other members due to the child riding on the footrest 16 is alleviated.

Then, when the child on the footrest 16 gets off, the connecting rod 33 is extended by the force of the spring 36 and returns to its original state.

When the connecting rod 33 is fully extended, the bolt 37 comes into contact with the end of the elongated hole 41 to prevent the cylindrical body 38 from being pulled out from the cylindrical body 34.

Further, the length of the elongated hole 41 is set to be sufficiently longer than the deflection of the spring 36, so that when the connecting rod 33 contracts, the bolt 37 comes into contact with the end of the elongated hole 41, and the above-mentioned impact load is not alleviated. Care has been taken to ensure that this does not happen.

Furthermore, the guarded motor 21 is provided with a temperature controller (not shown), and when the guarded motor 21 reaches a predetermined temperature or higher, the power supply circuit of the guarded motor 21 is cut off to prevent overheating.

Further, when the magnetizers 6, 10, 11, 12, and 18 are operated, magnetism is generated from these magnetizers, and thereby a person on the seat 3 can be subjected to magnetic pine surge.

Note that instead of fitting the spring 36 into the cylindrical body 34, a cylindrical body made of rubber may be fitted in a telescopic manner.

As explained in detail above, according to this invention, the connecting member connecting the backrest and the footrest is connected to the friction clutch connected to the drive motor. By operating the connecting rod that connects the backrest and footrest, the backrest and footrest can be swung together, and the inclination angle of the backrest and footrest can be adjusted without reversing the drive motor. can be adjusted.

Therefore, there is no need for limit switches and other control devices that are necessary when adjusting the inclination angle of the backrest and footrest by rotating the drive motor in the opposite direction, which simplifies the structure and reduces manufacturing costs. Turn on the power to the drive motor.

It is easy to operate since it only needs to be turned off, and if the drive motor is about to be overloaded, the friction clutch works to prevent this, so there is no risk of it breaking down.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway side view showing an embodiment of this invention, Fig. 2 is a partial vertical sectional view taken along the II-II feed line in Fig. 1, and Fig. 3 is a part of a continuous stroke of this invention. It is an omitted partially notched vertical cross-sectional view. 1...base, 3...seat, 7...
・Hinge, 8... Backrest, 14...
Connecting member, 15... Hinge, 16...
Foot rest, 20... Connection member, 21...
Guard motor, 23...Friction clutch, 31
・・・・・・Continue, 33・・・・・・Continue.

Claims (1)

[Scope of utility model registration request] A chair in which the inclination angle of the backrest and footrest can be adjusted by swinging the backrest and footrest hinged to both ends of the seat via a connecting member connected to the drive motor by a drive motor. A chair characterized in that a friction clutch is connected to the drive motor, and a connecting member connecting the backrest and the footrest is connected to the friction clutch.