JPH10295739A - Motor control system with switching means having operating command halt function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an unintentional action attributed to a touching by a demented aged person or a mischief by an infant from occurring. SOLUTION: When a motor control system is operated by a normal person, an ON/OFF switch 6 located on the back face of a switch 1 at hand is turned OFF. On the other hand, the ON/OFF switch 6 is turned ON so that only an attendant is allowed to operate it, when a demented aged person or an infant happens to be accessible to the operation. When the ON/OFF switch 6 is turned ON, a circuit between both terminals of operating switches Sw4 , Sw5 is closed through a short circuit switch circuit 9, resulting in both operating switches Sw4 , Sw5 being depressed simultaneously. Therefore, a controller interprets that two or more operating switches ate operated at the same time, and these operations are invalidated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation command stop function which can prevent unintentional operation due to, for example, an operation by an elderly with dementia or a prank operation of an infant or the like, and can contribute to improvement of safety. The present invention relates to an electric control system provided with switch means having:

[0002]

2. Description of the Related Art In recent years, electric beds have been increasing not only for hospitals but also for home use. In such an electric bed, a control signal is transmitted to a remote control switch (hereinafter, a hand switch) arranged on the bed floor and a motor which is a driving source of the floor position / posture adjusting mechanism in response to an operation command from the hand switch. And an electric control system configured by the controller. With such a configuration, the motor can be started by operating the hand switch, and the floor position / posture adjustment mechanism can be operated to easily adjust the inclination of the bottom and raise / lower.
It has become comfortable and easy to use for both users and caregivers. On the other hand, it is dangerous if an erroneous operation or a mischievous operation is not accepted. As one means for that, it has been proposed to provide a switch on the nurse panel or on the controller side in order to prevent or accept the operation signal from the hand switch depending on the situation.

[0003]

However, with the above-described structure, it is necessary to change the controller and the like, so that an increase in cost is unavoidable. Alternatively, the switch on the controller side must be operated, which is complicated, and the effect is reduced by half. The present invention has been proposed in view of such a background, an operation by an elderly person with dementia, and an undesired operation due to a mischief operation of an infant or the like can be prevented, and an operation that can enhance safety of an electric bed or the like can be performed. It is an object of the present invention to provide an electric control system including switch means having a command stop function.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a switch means for giving an operation command to operate a specific portion of an apparatus, wherein the switch circuit includes a plurality of operation switches. The switch circuit is provided with a means for forcibly creating an operation command signal cutoff condition, and the operation of this means prevents the operation command signal from the operation switch from being accepted. Further, the present invention has a switch circuit having a plurality of operation switches, switch means for giving an operation command to operate a specific portion of the device,
Based on a signal related to an operation command by the switch means, a desired specific portion is operated, and when an operation command signal is input by simultaneously pressing a plurality of operation switches, these operation command signals are ignored. In the electric control system, in parallel with any two of the operation switches in the switch circuit,
A short-circuit switch circuit for arbitrarily creating the ON states of these operation switches and preventing erroneous operation and tampering operation is provided. In the above-mentioned switch means, while a plurality of operation switches are arranged on the front surface of the casing, switches in the short-circuit switch circuit can be arranged on the rear surface of the casing.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an electric control system provided with a switch means having an operation command stopping function according to the present invention will be described with reference to the accompanying drawings, with reference to one embodiment. FIG. 1 shows, for example, a switch means 1 (hereinafter, a hand switch 1) for adjusting a floor posture of an electric bed (not shown). This hand switch 1
The controller is connected to a controller (not shown) mounted on the bed by a cable 2 for transmitting and receiving signals. The hand switch 1 is connected to a controller box (not shown) containing a controller.
It is configured to be detachably connected via a. That is, the hand switch 1 sends a command signal to the controller via the cable 2 by operating the hand switch 1, and supplies electric power from the controller to a motor (not shown), which is a drive source of a corresponding mechanism, so that the floor of the bed Etc. are adjusted to desired positions and postures. The hand switch 1 includes a hanging hook 5 in a casing 4, operation switches Sw1 to Sw6 disposed on the front surface, and an on / off switch 6 constituting a short-circuit switch circuit described later on the rear surface (see FIG. 2). ). The operation switch Sw1 corresponds to a back-up operation, Sw2 corresponds to a knee-up operation, Sw3 corresponds to a bottom-up operation, Sw4 corresponds to a back-down operation, Sw5 corresponds to a knee-down operation, and Sw6 corresponds to a bottom-down operation.

A switch circuit 7 and a display circuit 8 are mounted on the hand switch 1 as shown in FIG. 3. In the switch circuit 7, operation switches Sw1 and Sw are provided.
2. One terminal of Sw3 is connected to the anodes of diodes D1, D2 and D3, respectively.
The first current supply line L1 is connected to the other terminals of Sw3 to Sw3. Further, one terminal side of the operation switches Sw4, Sw5, Sw6 is connected to the anode side of the diodes D1, D2, D3, respectively, while a second energizing line L2 is connected to the other terminal side of these operation switches Sw4 to Sw6. ing. The cathodes of the diodes D1 to D3 are connected to a data line DATA.
1, DATA2, DATA3.

Next, in the display circuit 8, a light emitting diode is provided on the cathode side of the diodes D1 to D3.
The cathode side of LED1, LED2, LED3 is connected, and the first LED energizing line Le1 is connected to the anode side of these light emitting diodes LED1 to LED3. Further, light emitting diodes LED4, LE4 are provided on the cathode side of the diodes D1 to D3.
D5 and LED6 are connected on the cathode side, and the second LED energizing line Le2 is connected on the anode side of these light emitting diodes LED4 to LED6.

A short-circuit switch circuit 9 is connected in parallel between both terminals of the operation switches Sw4 and Sw5 in the switch circuit 7. In the short-circuit switch circuit 9, the anodes of the diodes D4 and D5 are connected in series to one terminal of the on / off switch 6, and the cathodes of the diodes D4 and D5 are connected to the operation switches Sw4 and Sw5, respectively. While being connected to the terminal side, the other terminal side of the on / off switch 6 is connected to the second energizing line L2.

Here, a controller for supplying power to a motor (not shown), which is a drive source of a corresponding mechanism, by an operation command signal from the operation switches Sw1 to Sw6 of the hand switch 1 as described above will be schematically described. . That is, the controller includes a power supply control circuit (not shown) that supplies power to the motor that is the drive source of the corresponding mechanism in response to an operation command signal from the operation switches Sw1 to Sw6, and the power supply control circuit includes the operation switch Sw1 The setting is made such that when at least two or more switches among Sw6 to Sw6 are simultaneously operated, those operation commands are not accepted.

In the electric control system configured as described above, when a normal user (patient, caregiver, etc.) operates, the on / off switch 6 on the back of the casing 4 of the hand switch 1 is turned off, Is the operation switch S
By w1 to Sw6, the bottom of the bed can be adjusted to a desired posture and height.

On the other hand, when the user leaves the bed, or when the patient is a demented elderly person, the ON / OFF switch 6 on the back of the casing 4 is turned ON so that only the caregiver can operate. When the on / off switch 6 is turned on, the terminals of the operation switches Sw4 and Sw5 are closed via the short-circuit switch circuit 9 to be energized, and the operation switches Sw4 and Sw5 are simultaneously pressed and operated. The data lines DATA1 and DATA2 are taken out as operation commands and transferred to the controller via the cable 2. Then, assuming that two or more operation switches are simultaneously operated in the controller, these operations are invalidated, and the bottom posture and height adjustment are not performed at all. Therefore, in this state, it is possible to prevent the operation by the elderly with dementia or the unintentional operation of the bottom of the bed due to the mischief operation of the infant or the like, and the on / off switch 6 is provided on the back surface of the casing 4. , Can not be easily operated for elderly people with dementia, infants, etc.
Safety is greatly improved. In addition, even when not in use,
Alternatively, if the on / off switch 6 is turned on even at bedtime, it is possible to prevent the operation switch from being inadvertently touched and causing the bottom to move unexpectedly.

As described above, the function of the controller, that is, the function of not accepting two or more operation commands, can be provided by simply adding and changing a few components to the switch circuit 7 of the hand switch 1. Yes, there is no need to change the controller, and there is no problem in terms of cost.

[0013]

As described above, according to the present invention, there is no need to transmit a signal to enable / disable the hand switch from the hand switch or the nurse panel to the controller. Since the function of the controller can be utilized, it is not necessary to improve the controller. Further, since only a few components are added to the hand switch side, cost increase can be suppressed as much as possible.

[0014]

[Brief description of the drawings]

FIG. 1 is an overall front view of a hand switch in an electric control system according to the present invention.

FIG. 2 is an overall rear view of the hand switch in the electric control system according to the present invention.

FIG. 3 is a circuit diagram mounted on a hand switch.

[Description of Signs] 1 Hand switch 2 Cable 3 Connector 4 Casing 5 Hanging hook 6 On / off switch 7 Switch circuit 8 Display circuit 9 Short circuit switch circuit Sw1 ~ Sw6 Operation switch D1 ~ D5 Diode LED1 ~ LED6 Light emitting diode

Claims (3)

[Claims] 1. A switch means for giving an operation command to operate a specific part of an apparatus, comprising a switch circuit having a plurality of operation switches, and forcing the switch circuit to generate an operation command signal cutoff condition. An electric control system comprising switch means having an operation command stop function, wherein the operation command signal from the operation switch is not accepted by operation of the means. A switch circuit for providing an operation command to operate a specific portion of the apparatus; and a desired specific portion based on a signal related to the operation command from the switch portion. On the other hand, when an operation command signal is input by simultaneously pressing a plurality of operation switches, the electric control system is configured to ignore these operation command signals. An electric control system comprising switch means having an operation command stop function, provided with a short-circuit switch circuit for arbitrarily setting an ON state of these operation switches in parallel with the two operation switches. 3. The operation command stopping function according to claim 2, wherein a plurality of operation switches are arranged on the front surface of the casing, and switches in the short-circuit switch circuit are arranged on the rear surface of the casing. An electric control system including switch means.