JPS625347A - Control system of medical treatment stand apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a medical treatment table device in which a treatment table chair and a treatment handpiece that can be adjusted in various ways such as lifting and lowering are arranged near the chair. It is related to the control method.

<Prior Art> Taking a device including this type of treatment table chair and a treatment handpiece, such as a dental treatment table device, first, an operator (doctor) moves the treatment table chair on which the patient is sitting. After setting it to the optimal height and adjusting the orientation, hold the treatment handpiece and
Treating a patient's teeth.

<Problems to be solved by the invention> However, in such a treatment table device, for some reason (contact by a treatment assistant, getting caught in the cords of various instruments, etc.) during the treatment of the operator, If the set switch or reset switch of the treatment table chair is turned on and the set position of the chair changes, the cutting tool at the tip of the handpiece may dig into the gums, which is extremely dangerous.

Therefore, preferably, during treatment, that is, while the handpiece is in use, operations such as lifting and lowering of the treatment table chair should be stopped.

From this point of view, some proposals have been made in the past that give priority to the use of handpieces, but many of these have been complicated, such as by using full-scale IC circuits.

The present invention has been made in view of the current situation, and aims to achieve the object with a relatively simple configuration.

Means for Solving the Problems> The features of the present invention include a treatment chair, a set and reset control circuit for controlling the lifting and lowering of the treatment chair, and a set and reset control circuit for controlling the lifting and lowering of the treatment chair. A treatment handpiece placed nearby and a hanger switch on which the handpiece is placed, the set and reset control circuit being provided with both switches between the set and reset control circuit and the set and reset switch that drives each of the control circuits. A cutoff circuit is provided to cut off the operation signal of the handpiece, and the cutoff circuit is driven by a signal from the hanger switch obtained when the handpiece is used.

<Function> As a result, when using the handpiece, the signal from the hanger switch is input to the cutoff circuit, so the setting and reset switch of the treatment table chair will not work (1. There's nothing to do.

<Embodiment> FIG. 1 shows an example of a control system for a medical treatment table and chair apparatus according to the present invention.

In the figure, 1 is a treatment table chair, 2 and 3 are set and reset control circuits that control the lifting and lowering of the treatment table chair 1, and 4.
5 is a set and reset switch that drives the set and reset control circuit 2.3, 6 is a treatment handpiece placed near the treatment table chair 1, 7 is a hanger switch on which the handpiece 6 is placed, and 8 is a This is a cutoff circuit provided between the set and reset switch 4.5 and the set and reset control circuit 2.3.

For example, in the case of dental use, the treatment table chair 1 can freely raise and lower the seat, adjust the angle of the backrest, and move the leg rest up and down, and is controlled by set and reset control circuits 2 and 3. . For example, to raise and lower the seat, upper limit and lower limit switches are provided, and by turning on the set switch 4, the treatment chair 1 is set to a predetermined set height, and by turning on the reset switch 5, By turning it on, it can be returned to a predetermined reset position.

The handpiece 6 has a tool (cutting tool, etc.) at its tip.
It is connected to an air source 9 such as a compressor via a foot switch 10 and a switching valve 11. It is driven by supply of pressurized air from this air source 9, and is placed on the hanger switch 7 when not in use. This hanger switch 7 is a combination of a switching valve 12 connected to the air source 9, and this switching valve 1
The output side of 2 is linked to the control section of the switching valve 11 on the air supply side, so that when the hand piece 6 is lifted, the switching valve 12 opens, and in conjunction with this, the switching valve 11 opens. ing. Conversely, when the hand piece 6 is placed on the hanger switch 7, the switching valve 12 closes, and in conjunction, the switching valve 11 closes.

The cutoff circuit 8 includes set and reset switches 4 and 5.
This circuit prohibits (stops) the operation (on or off) signal from being input to the setting and reset control circuit 2.3 of the treatment table chair 1, and switches the hanger switch 7 through the static switch 13. connected to the output side of the valve 12,
It is controlled by a signal from the hanger switch 7. That is, when the switching valve 12 is opened by lifting the hand piece 6, the slider 15 in the cylinder 14 is pressed down in the pneumatic mechanism part of the static switch 13 by the air pressure, and the slider 15 moves downward in the figure. The movable contact piece 16 is turned on, and a positive voltage is applied to the cutoff circuit 8 from the power supply 17. That is, the cutoff circuit 8 is brought into a driving state. Conversely, when the hand piece 6 is placed on the hanger switch 7 and the switching valve 12 is closed, the slider 15 is pushed back by the compression spring 18 in the pneumatic mechanism part of the static switch 13 and moves upward in the figure, causing the switch to close. The movable contact piece 16 of the mechanism part is turned off, and the voltage application from the power source 17 is released. That is, the cutoff circuit 8
becomes non-driving.

Specific examples of this cutoff circuit 8 are shown in FIG. 2, FIG. 3, or FIG. 4, for example.

The cutoff circuit 8 of FIG. When there is no signal input (voltage applied), that is, when the static switch 13 is off, the relay contact 20a
, 20b are always closed, but when there is a signal input (voltage application) to the base 19g, that is, when the static switch 13 is turned on, the power supply 21 connected to the relay coil 20c closes.
From the collector 19c1 of the transistor 19
A current flows between E and energizes the relay coil 20C, opening the relay contacts 20a and 20b. That is, when the handpiece 6 is lifted from the hanger switch 7, the relay contacts 20a, 20b are opened, and the set/reset switch 4.5 and the set/reset control circuit 2.3 are cut off. ing.

The cutoff circuit 8 in FIG. 3 includes a transistor 19 and a latch circuit 2.
2, this latch circuit 22 may be a commercially available one, which is connected to the base 19.2 of the transistor 19. Signal input (
When there is no voltage applied (voltage applied), that is, when the static switch 3 is off, the misset and reset switches 4 and 5 are connected to the set and reset control circuit 2.3, but a signal is input (voltage applied) to the base 19m. If there is, that is, when the static switch 13 is turned on, the operation (on or off) signals of the set and reset switches 4 and 5 are latched and not transmitted to the set and reset control diagrams B2 and B3. In other words, when the handpiece 6 is lifted from the hanger switch 7, the launch circuit 22 is activated, and the set and reset switches 4 and 5 and the set and reset control circuit 2.3 are cut off.

The cutoff circuit 8 shown in FIG. 4 includes two transistors 23 and 24 inserted between the set switch 4 and the set control circuit 2, and between the reset switch 5 and the reset control circuit 3, and a switch mechanism part of the static switch 13. , the fixed part of the movable contact piece 16 is connected to the base 23 of the transistor 23.24.
g, 24g and always grounded. Therefore, under normal conditions, the emitters 23E of each transistor 23, 24,
24E and the collectors 23c and 24c are kept conductive, and the set and reset switch 4.5 and the set and reset control circuit 2.3 are connected.
When there is a signal input (voltage application) to ++ and 24m, that is, when the static switch 13 is turned on, each transistor 2
3.24 emitters 23t, 24E and collector 23C,
24c is cut off, and the operation (ON or OFF) signal of the set and reset switch 4.5 is not transmitted to the set and reset control circuit 2.3 side. In other words, when the handpiece 6 is lifted from the hanger switch 7,
The set and reset switch 4.5 and the set and reset control circuits 2 and 3 are cut off.

According to the present invention, in any case, when the handpiece 6 is lifted from the hanger switch 7, the control signal from the hanger switch 7 is input to the cutoff circuit 8, and the treatment table chair 1 side is inoperable. becomes.

Note that the hanger switch 7 may be combined with an electric switch 25 instead of the switching valve 12 as shown in FIG. 5. In that case, when the hand piece 6 is lifted, the movable contact piece 26 It is preferable to contact the output side contact 27 so that the voltage from the power supply 28 is applied to the cutoff circuit 8 side.

(Effects of the Invention) As described above, according to the control method of the medical treatment table device of the present invention, the configuration is extremely simple and priority is given to the use of the handpiece. The cutoff circuit is activated by the signal from the hanger switch when the piece is lifted, and the setting and reset switches for the treatment table chair are no longer activated, so there is no careless lifting or lowering of the treatment table chair, and the operator can operate with a high degree of safety. You can concentrate on your treatment.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram showing one embodiment of a control system for a medical treatment table device according to the present invention, and FIGS. 2 to 4 are explanatory diagrams showing specific examples of a cutoff circuit used in the present invention. , FIG. 5 is an explanatory diagram showing another example of the part. In the figure, 1... treatment table chair, 2... set control circuit, 3... reset control circuit. , 4... Set switch, 5... Reset switch, 6... Hand piece, 7... Hanger switch, 8... Cutoff circuit.

Claims (1)

[Claims] A treatment table chair, a set and reset control circuit for controlling the lifting and lowering of the treatment table chair, a treatment handpiece disposed near the treatment table chair, and a hanger switch on which the handpiece is placed. A cutoff circuit is provided between the set and reset control circuit and the set and reset switch that drives each of the control circuits to cut off the operating signals of both switches, and the cutoff circuit is connected to the set and reset control circuit when the handpiece is used. A control system for a medical treatment table device, characterized in that it is driven by a signal from a hanger switch obtained.