JPS6149978B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus that automatically sets an examination table to a pre-stored height.

Generally, an examination table for obstetrics and gynecology is set at a lowered position on which a patient is placed, and then raised to adjust the height to a height that is convenient for the doctor to perform the examination. After the examination is completed, the examination table is lowered to lower the patient, and then raised again for the next examination. Therefore, a doctor must take the trouble of adjusting the examination table to a height that is convenient for each examination.

The present invention has been developed in view of the above-mentioned problems.The height of the examination table is set in advance and stored, and the height is automatically set each time a medical examination is performed. Embodiments of the present invention will be described below with reference to the drawings.

In the figure, a medical examination table 1 is configured to move up and down in the direction of the arrow by, for example, a single-acting hydraulic cylinder. This vertical movement is supplied between terminals 2 and 3.
This is done by operating the hydraulic pump motor 4 and the solenoid valves 5 and 6 with the AC100V power supply voltage.
The examination table 1 is raised by driving the motor 4 and energizing the solenoid valve 5 to form a hydraulic circuit for lifting, and by energizing the solenoid valve 6 to form a hydraulic circuit for lowering. descend. In the case of descent, the motor 4 is not operated, and the examination table 1 is lowered by its own weight or its own weight including the load. The motor 4 and the electromagnetic valve 5 are energized by the triac 9 constituting the photocoupler 7 being conductive, and the electromagnetic valve 6 is energized by the triac 10 constituting the photocoupler 8 being conductive. In order to adjust and set the height of the examination table 1, manual setting switches S ₁ and S ₂ and automatic setting switches S ₃ and S ₄ are provided. The switches S ₁ and S ₃ are for raising, and the switches S ₂ and S ₄ are for lowering. Also switch
S ₁ to _{S 4} may be closed by stepping on a pedal.

In this embodiment, first, the switches S ₁ and S ₂ are closed, the examination table 1 is moved up and down to adjust it to the desired height, and the height is stored in the analog memory 11 as a set value. Examination table 1 with ₃ or S ₄
It is designed to move up and down. That is, after setting the height, when the switch _S3 is closed from the lowered position of the examination table 1, the examination table 1 automatically rises to the set height and stops, and from this state, when the switch _S4 is closed, it is lowered. The set values stored at this time are retained. Furthermore, if the switch _S1 or _S2 is closed at any time, the examination table 1 is raised or lowered, and the height at the time of stopping is stored in the memory 11 as a new set value. Also, Switch S ₅ is an upper limit switch, Switch S ₆
are lower limit switches, each of which is used as a limit switch, and defines the highest and lowest positions of the examination table 1.

Next, the operating procedure and circuit operation will be explained.

Now, suppose that the examination table 1 is at the lowest position, and when switch S ₁ is closed in this state, AND gate 12
input a and the a input of Noah gate 13 are "L"
(low level), and the outputs of each gate 12 and 13 are inverted. The inverted output of the NOR gate 13 is transmitted to the b input of the NAND gate 15 via the inverter 14, and the output is inverted to "L". As a result, the light emitting diode 16 constituting the photocoupler 7 becomes conductive and emits light.
conducts. As a result, power is applied to the motor 4 and the solenoid valve 5, and the examination table 1 starts to rise. In conjunction with this rise, the slider 19 of the sliding resistor 18 slides, thereby changing the voltage V _c obtained by dividing the reference voltage Vref. When the examination table 1 rises to a desired height, switch _S1 is opened. As a result, the output of the NAND gate 15 becomes "H" (high level), the light emitting diode 16 becomes non-conductive, and therefore the power to the motor 4 and the solenoid valve 5 is cut off, and the examination table 1
stops. At the same time, the output of the NOR gate 12 falls to "L", and this fall triggers the memory hold signal forming circuit 20, which is composed of a monomulti or the like. The output pulse P of this circuit 20 generates a voltage V corresponding to the height of the examination table 1 at the time of stop.
_c1 is sampled and stored in memory 11. If the switch _S1 is closed again in this state, a similar operation is performed to raise the examination table 1, and when it is stopped, the stored value in the memory 11 is updated. Also, if switch S ₂ is closed, AND gate 12
Then, the b input of the NOR gate 21 becomes "L", and the outputs of the respective gates 12 and 21 are inverted. The inverted output of the NOR gate 21 is transmitted to the NAND gate 23 via the inverter 22, and its output becomes "L". As a result, the light emitting diode 17 constituting the photocoupler 8 becomes conductive and emits light, so that the triac 10 becomes conductive. As a result, the electromagnetic valve 6 is energized and the examination table 1 is lowered.

Then, when it has descended to the desired position, switch S ₂
When opened, the output of the NAND gate 23 becomes "H" and the examination table 1 stops. At the same time, the output of the AND gate 12 falls, triggering the signal forming circuit 20, and the output pulse P updates the contents of the memory 11 to a voltage value corresponding to the height of the examination table 1 at the time of the stop.

By closing the switches S ₁ and S ₂ as described above, the examination table 1 can be adjusted to a desired height. Then, a voltage value V _c1 corresponding to the set height is stored in the memory 11. Furthermore, when the examination table 1 reaches the upper limit or lower limit position, the switch _S5 or _S6 is closed, and the NAND gate 15 or 2 is thereby closed.
3 becomes "H", the examination table 1 immediately stops.

Next, a case in which the height is automatically set will be explained.

As mentioned above, the switches S ₁ and S ₂ switch the examination table 1.
After adjusting the voltage to a desired height and storing the voltage value V _c1 corresponding to the height in the memory 11, the switch _S4 is closed. As a result, the actual operation setting control circuit 2
4's a input becomes "L" and its d output becomes "L"
This inverted output passes through the NOR gate 21 and the inverter 22 and makes the output of the NAND gate 23 "L". Therefore, the electromagnetic valve 6 is energized and the examination table 1 is lowered by its own weight. When it descends to the lower limit position, the switch _S6 is closed and the output of the NAND gate 23 becomes "H" and stops.

Next, after placing, for example, a patient on the examination table 1, when the switch _S3 is closed, the b input of the control circuit 24 becomes "L".
As a result, the c output becomes "H". This output is NAND gate 25, NOR gate 13, inverter 14
As a result, the output of this NAND gate 15 becomes "L" and the examination table 1 rises. Along with this rise, the voltage V _c representing the height rises and is applied to the comparator 26 . The memory 11 applies this voltage V _c1 to the comparator 26 immediately after the set value voltage V _c1 is stored. The comparator 26 compares _Vc and _Vc1 , and when the examination table 1 rises to a height where _Vc exceeds _Vc1 , the comparison output becomes "L". This comparison output is transmitted to the NAND gate 15 and the output becomes "H", whereby the examination table 1 is stopped at the set height. When the switch _S4 is closed again after the end of the examination, the output of the NAND gate 23 becomes "L", the examination table 1 is lowered, and the switch _S6 is closed and stopped at the lower limit position. Note that the inverted output of the comparator 26 is applied through an AND gate 27 as an e input of the control circuit 24. By this,
Control circuit 24 is reset to its initial state. Furthermore, when the switch _S5 is closed, the e input of the AND gate 27 becomes "L" and the control circuit 24
is reset and switch _S6 is closed, control circuit 24 is reset at the f input.

According to the above, the examination table 1 can be adjusted to an arbitrary height by inverting the NAND gate 15 or 23 through the NAND gate 13 or 21 using the switch S ₁ or S ₂ . Along with this, any height can be set. In addition, after setting the height, by closing switch _S3 , control circuit 2
By inverting the NAND gate 15 through the NAND gate 25 and NOR gate 13 based on the c output of No. 4 and the output of the comparator 26, the NAND gate 15 can be automatically raised to a set position and stopped. still,
The switch _S4 is used to lower the robot from the set position, and since the lowering is performed by its own weight, the stopping position is determined by the lower limit switch _S6 .

According to this embodiment, all of the above-mentioned operations are performed electrically, so that stable operations can be achieved with fewer malfunctions. Furthermore, since the drive circuit of the examination table 1 is operated by the photocouplers 7 and 8, reliability is higher than when a mechanical switch such as a relay is used. Incidentally, when setting the height using the switches S ₁ and S ₂ , the fact that the height has been set may be indicated by a signal sound or the like. In that case, for example, an oscillator may be driven by the output pulse P of the signal forming circuit 20, and the oscillated sound may be emitted from a speaker for a predetermined period of time, or may be displayed using a lamp, a light emitting diode, or the like.

As described above, the present invention provides first and second switches (for example, switch S ₁ ,
S ₃ ), means for detecting the height of the examination table (for example, sliding resistor 18), and means for storing the detected value of the height when the examination table is raised by the first switch. (e.g., memory 11) and a means for comparing the value detected by the second switch (e.g., switch S ₃ ) when the examination table is raised with the stored value (e.g., V _c1 ). and an automatic height setting device for an examination table, characterized in that when the examination table is raised by the second switch, the examination table is stopped by the inverted output of the comparison means. It is something.

Therefore, according to the present invention, once the height of the examination table is set, the height is automatically set by simply operating the second switch, so there is no need to adjust it every time it is used. This eliminates the need for medical examinations, making it possible to perform medical examinations more efficiently.

[Brief explanation of the drawing]

The drawing is a circuit diagram showing an embodiment of the present invention. In addition, in the symbols used in the drawings, 1...examination table, 11...analog memory, 18...sliding resistor, 20...memory hold signal forming circuit,
24...Automatic setting control circuit, 26...Comparator, _S1 , _S2 ...Manual setting switch, _S3 , _S4 ...
This is an automatic setting switch.

Claims (1)

[Claims] 1. First and second switches for raising the examination table, means for detecting the height of the examination table, and storing the detected value of the height when the examination table is raised by the first switch. and the second method mentioned above.
means for comparing the detected height when the examination table is raised by the second switch with the stored value, and the comparison is made when the examination table is raised by the second switch. An automatic height setting device for an examination table, characterized in that the examination table is stopped by a reverse output of the means.