JPH059865Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is used to operate a chair such as a hairdressing chair or a dental chair, such as raising and lowering the seat, raising and lowering the backrest, etc. Regarding equipment.

[Conventional technology]

Conventionally, when operations such as raising and lowering the seat of a hairdressing chair, raising and lowering the backrest, etc., are performed using electric or other mechanical means, it is generally done using a foot-operated switch or a hand-operated switch. It was spot on.

[Problem that the invention aims to solve] When performing this operation with a switch, at least one hand is required, but while doing hairdressing, both hands are often occupied and it may not be possible to operate the switch. It was inconvenient.

For this reason, foot-operated switches have come into widespread use, and they are usually installed at the base of a hairdressing chair set on the floor.

However, the seat of the hairdressing chair rotates during the hairdressing process, and the hairdresser may move to the opposite side of the foot switch.

Then, the hairdresser has the inconvenience of having to turn to the other side to press the foot switch, and in order to press the switch, he has to lift one leg off the floor, which also causes his posture to become unstable.

Dust and cut hair tend to accumulate on the back of the foot switch, which is not only unsanitary but also obstructs its operation.Moreover, a moderate amount of force is required to operate the foot switch. Because of this, I had to adjust the amount of pressure I applied.

[Purpose of invention]

This invention allows the operation location to move as the seat rotates, making it possible to operate the seat without turning to the opposite side, and to operate the drive means without lifting the feet, thereby preventing unstable posture. It is an object of the present invention to provide a chair operating device capable of preventing such occurrences and preventing malfunctions such as unconsciously operating a detection means.

[Means to solve the problem]

In order to achieve the above object, the present invention includes an irradiation member that is provided on the underside of the base of the chair and that irradiates a display displaying operation contents such as characters and figures onto the installation surface of the chair; Located adjacent to
an optical sensor that receives reflected light from the installation surface of the chair, a detection means that determines whether or not an optical path toward the optical sensor is blocked and is switched to an on state or an off state, and a detection signal from the detection means; Therefore, the chair is characterized by comprising a driving means for raising and lowering the chair, and a switch means provided at a part of the backrest for enabling the driving means to operate.

[Example of idea]

Next, a case where an example of the implementation of the present invention is applied to a hairdressing chair will be described with reference to the drawings.

As shown in FIGS. 1 and 2, inside the cover 2 on the back of the base 1 installed on the floor surfaces F and L, there is a cylindrical body that irradiates the light beam of the light bulb 3 toward the bottom surface. 4 and an optical sensor 5 that emits infrared rays and picks up the reflected light.

Attached to the lower side of the cylinder 4 are a light shielding plate 6 that allows characters and figures to pass through, and a concave lens 7 that magnifies and illuminates the letters and figures onto the floor. When lit, the required characters and figures are projected onto the floor.

These characters and figures are displayed according to the content of the operation; for example, the content is displayed according to the number of operations, such as ``Up'' for raising the seat and ``Dw'' for lowering the seat.

The optical sensors 5 are installed as many times as the number of operations required, and are installed facing the illuminated letters and figures on the floor surfaces F and L, and pick up the reflected light from the floor surfaces F and L to turn them on. It's summery.

However, if a foot or the like is inserted into the passage path of the light rays of the letters, figures, etc., and the letters, figures, etc. are no longer reflected on the floor surfaces F and L, the reflected light from the optical sensor 5 is also blocked, so the optical sensor 5 detects this,
This is the OFF state.

Furthermore, on the back of the backrest 8, there is provided an earthing switch 9 which is turned on by touching it, and as shown in FIG. voltage is applied to the light bulb 3 and the light sensor 5 via the earth switch 9.
is supplied to a detection circuit 11 connected to.

Therefore, unless the earth switch 9 is touched, the light bulb 3 will not light up and the detection circuit 11 will not operate.

Then, when you touch earth switch 9, light bulb 3
lights up and projects letters and figures on the floor surfaces F and L.
The optical sensor 5 becomes operational.

At this time, when the reflected light to the optical sensor 5 is blocked, the optical sensor 5 becomes OFF state, and the detection circuit 11
is operated by this, and relay switch 12 is activated.
It is turned on to rotate the drive device 13, for example a seat lift motor, to raise the seat.

However, when two or more optical sensors 5 are installed to perform two or more operations, such as raising and lowering the seat, the malfunction of one optical sensor 5 due to the blocking of light from the other optical sensor 5 can be prevented as follows.

FIG. 4 is a circuit diagram in that case, and when performing the A operation and the B operation, the optical sensors 5A and 5B emit pulses a and b at different timings as shown in FIG. 5.

Therefore, the pulse a' is received by the optical sensor 5A, and the pulse b' is received by the optical sensor 5B.
Even if this light is received at a timing shifted from the received light timing, as shown in b' in the same figure, this is determined by the determination circuit 14 in FIG. 4.

Thereby, erroneous light reception is determined, the detection unit 15 is operated, and the drive device 13 is caused to drive up and down.

In addition, although the light bulb 3, cylinder body 4, and optical sensor 5 are installed on the base 1, if this is installed on the seat,
As the seat rotates, these components also rotate, and their operating positions also move together with the seat, so there is no need for the operator to move to the operating position, unlike when the operating position is constant. It disappears.

Although the above-mentioned embodiment has been described with reference to a case where the present invention is applied to a hairdressing chair, it goes without saying that the present invention can also be applied to a chair such as a dental chair in which the seat part moves up and down.

[Effect of idea]

As described above, the present invention enables the desired operation of the chair by inserting the feet into the letters and figures projected on the floor and blocking the reflection and transmission of the detection wavelength of infrared rays. It can be carried out.

In the configuration of the present invention, by touching the switch means provided on the back of the chair and inserting the foot between the bottom surface of the chair base and the floor surface, This has the effect of being able to operate the driving device of the chair without using both hands.

Therefore, unlike conventional foot switches, there is no need to lift your feet off the floor to operate them, eliminating the instability of your posture caused by lifting your feet, and eliminating the unsanitary condition of dust, etc., accumulating on the underside of the foot switch. The malfunction associated with this will be eliminated.

Furthermore, since a non-contact switch such as an optical sensor is used, mechanical failures such as poor contact do not occur, and the appearance does not deteriorate unlike a foot switch.

Furthermore, since a malfunction prevention switch such as a ground switch is also used, malfunctions caused by inserting one's foot within the operating range of the detection means can be prevented.

Furthermore, if the irradiation member and the detection means are attached to a rotatable seat, the detection position will also rotate as the seat rotates, eliminating the need for the operator to move to the detection position. It is.

[Brief explanation of the drawing]

Fig. 1 is an external side view of one embodiment of the present invention;
3 is a circuit block diagram thereof, FIG. 4 is a circuit block diagram for multiple operations, and FIG. 5 is an explanatory diagram thereof. 3... Light bulb, 5... Light sensor, 6... Light shielding plate,
7...Concave lens, 9...Earth switch, 11...
...Detection circuit, 12...Relay switch, 13...
Drive device, 14...discrimination circuit, 15...detection section.

Claims (1)

[Scope of utility model registration request] an irradiation member that is provided on the underside of the base of the chair and that irradiates a display displaying operation contents such as characters and figures onto the installation surface of the chair; and an irradiation member that is provided adjacent to the irradiation member and that is provided on the installation surface of the chair. an optical sensor that receives reflected light from the optical sensor; a detection device that determines whether the optical path toward the optical sensor is blocked and is switched to an on state or an off state; and a detection signal from the detection device that allows the chair to be raised or lowered What is claimed is: 1. A chair operating device comprising: a drive means for performing operations such as the above, and a switch means provided at a part of a backrest for enabling the operation of the drive means.