JP2008029449A - Communication mode determining device for hand switch in electrically operated machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent communication abnormalities or the like when a hand switch 4 is connected to a separate controller 6 of a different communication mode with an electric power switch 7a of the hand switch 4 turned on in the hand switch 4 for controlling to raise or lower an electrically operated bed 1 by inserting the hand switch 4 into the electrically operated bed 1. <P>SOLUTION: A signal to reset the controller is output from the hand switch when the hand switch is connected to the separate controller with the electric power switch 7a turned on, and the hand switch which receives the signal obtains the communication mode corresponding to the separate controller by carrying out the operation to obtain a communication mode again. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention belongs to the technical field of a hand switch controller in an electric actuator that operates electrically such as a transport vehicle or an electric bed.

In general, some of these types of electric actuators are equipped with a remote control type hand switch in order to operate an actuator provided in the actuator, and the actuator can be operated by operating the hand switch. ing. In this case, the hand switch may be detachably connected to a controller provided in the actuator, and the hand switch may be removed when unnecessary (see, for example, Patent Documents 1 and 2).
JP 2000-37425 A Japanese Utility Model Publication No. 6-26839

There are places where a large number of such electric actuators are provided. In such places, the specifications of the controller may differ between old and new depending on the purchase time of the electric actuator. In this way, when the controller is different between old and new, the communication format of the hand switch has been changed to a new one when the power is turned on, for example. Old → new... Are output alternately, and when the controller responds normally, either new or old is recognized and this is determined.
However, in the hand switch, when the new or old format is confirmed, the determined one is maintained in the power-on state, and as a result, when the hand switch is connected to another actuator with the power turned on next When the format of the actuator is different, there is a problem that the actuator does not move due to communication abnormality, and here is a problem to be solved by the present invention.

The present invention has been created in order to solve these problems in view of the above circumstances, and the invention of claim 1 provides a controller for driving an actuator system provided in an electric actuator. When connecting a hand switch for outputting a drive control command to the controller in a wired and detachable manner, the hand switch consists of a power switch, switches for outputting a switch command necessary for driving the actuator system, and a controller. Communication mode capturing means for capturing a plurality of communication modes, communication mode determining means for determining the communication mode of the connected controller based on an ON operation of the power switch, and a hand switch while the power switch remains ON The communication mode determined based on being connected to another controller A communication mode fixing device of hand switch in electric actuating motor which is characterized by being configured a communication mode reestablished means for the determination of resetting to the communication mode again.
According to a second aspect of the present invention, the communication mode re-establishing means receives a reset signal output means for outputting a reset signal to the controller in response to the fact that the hand switch is connected to another controller, and the controller is reset. And a mode resetting means for resetting the communication mode when the communication mode is reset, and a mode resetting means for resetting the communication mode based on the resetting of the communication mode. A communication mode determination device for a hand switch in the electric actuator according to Item 1.
In the invention of claim 3, the communication mode re-establishing means includes a mode reset means for resetting a communication mode that has been confirmed in response to the hand switch being connected to another controller, and the communication mode is reset. 2. The communication mode determination device for a hand switch in an electric actuator according to claim 1, further comprising mode re-determination means for re-determining the communication mode based on the mode switch.

According to the first aspect of the present invention, when the hand switch is connected to another controller while the power switch is in the ON state, the hand switch resets the communication mode that has already been established, and the other controller Therefore, it is possible to avoid the occurrence of communication abnormality.
According to the second aspect of the present invention, since the communication mode is re-determined after resetting the controller, a special detection circuit is not required and the structure can be simplified.
According to the third aspect of the present invention, although it is necessary to provide detection means for detecting connection to another controller on the hand switch side, a communication mode corresponding to the case of connection to another controller is required. You will be able to win.

  Next, embodiments of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 denotes an electric bed which is an example of an electric actuator. The electric bed 1 is an actuator system in which a backrest portion 1a, a waist portion 1b, and a foot portion 1c are composed of a plurality of electric actuators (electric motors) not shown. The raising / lowering operation is performed by M. However, since these raising / lowering mechanisms employ general-purpose ones, detailed description thereof is omitted here.

  2 is a female connector provided on the electric bed 1, and 3 is a male connector provided at the tip of a cord 5 extending from the hand switch 4. The hand switch 4 and the electric bed 1 are connected by connecting these connectors 2 and 3. The controller 6 is detachably connected.

  The hand switch 4 has a switch output provided with a plurality of switches 8 for driving the actuator system M in addition to a power supply circuit 7 provided with a power switch 7a for turning on and off the power supply (battery power supply). A circuit 9 is provided. With the hand switch 4 connected to the controller 6, the power switch 7a is turned on and the necessary switches 8 are operated to output a drive signal for driving the actuator system M. It is supposed to be.

The controller 6 is provided with an AC / DC converter circuit 11 connected to an insertion plug 10 to be plugged into a household outlet, and the controller 6 and the power supply actuator M are connected to the direct current converted by the AC / DC converter circuit 11. It comes to be driven by.
Reference numeral 12 denotes a switch input circuit provided in the controller 6. The switch input circuit 12 receives signals from the power supply circuit 7 and the switch output circuit 9.

  Reference numeral 13 denotes a control unit provided in the controller 6. The control unit 13 is configured using various electric and electronic devices such as a microcomputer, and performs necessary calculations based on various signals input to the switch input circuit 12. Then, a necessary drive signal for the actuator system M is output to the output circuit 14, and the actuator system M is driven based on the signal output from the output circuit 14.

  In the present embodiment, the switch output circuit 9 of the hand switch 4 can be set to a plurality (for example, not only the number of old and new, but also two or more types depending on the model, manufacturer, etc.) corresponding to the old and new, for example. A format capturing unit 15 in which a communication format is captured, and the plurality of captured communication formats are repeated in a preset order based on turning on the power by turning on the power switch 7a. The data is output to the controller 6. In the controller 6, the communication format input by the control unit 13 is read, and when there is a communication format that matches the communication format set (registered) by itself, the matching communication format is stored in the hand switch 4. The format capturing unit 15 is set to switch the format so as to output a switch signal determined to the fed back communication format.

  Further, the power supply circuit 7 is provided with a reset signal output circuit 16 for outputting a reset signal to the controller 6. The reset signal output circuit 16 is configured using a capacitor in the present embodiment. Yes. When the hand switch 4 is connected to a different (different) controller 6 with the power switch 7a kept ON, the capacitor charging current from the reset signal output circuit 16 flows to the controller 6 and the voltage drop In response to this, the control unit 13 receives the reset signal from the reset circuit 17 provided in the controller 6 and is reset, and this is fed back to the hand switch 4 so that the hand switch 4 is also reset. As a result, the local switch 4 repeats the sequential output of the communication format to determine the communication format corresponding to the controller 6, thereby enabling the output of the switch signal corresponding to the controller 6. Yes.

  In the embodiment of the present invention configured as described above, the power switch 7a of the hand switch 4 is kept in the ON state, and the connector 3 of the hand switch 4 is pulled out from the connector 2 on the electric bed 1 side to be different from the electric bed 1 In this case, the hand switch 4 is connected to a different controller 6, and in this case, the capacitor charging current from the reset signal output circuit 16 flows to the controller 6, causing a voltage drop. When the control unit 13 receives the reset signal, the control unit 13 receives the reset signal from the reset circuit 17 provided in the controller 6 and is reset. The control unit 13 is fed back to the hand switch 4 so that the hand switch 4 is also reset. The hand switch 4 repeats the sequential output of the communication format. It will be to determine the communication format corresponding to the controller 6 Te, thereby becomes possible to output a switch signal corresponding to the controller 6. As a result, the hand switch 4 has a communication format corresponding to the controller 6 and can avoid a problem that a communication abnormality occurs.

  In addition, since the controller 6 is reset in the control unit 13, the communication format of the hand switch 4 is alternately output from new to old to new as in the case of power-on. When the controller responds normally to any one of them, it recognizes whether the responding one is new or old, and determines the recognized communication format, so that the capacitor 16 is charged on the hand switch 4 side. It is not necessary to provide a detection circuit for detecting that the current has decreased, and the communication format can be rewritten using the existing one as it is.

  Of course, the present invention is not limited to the above-described embodiment, and the communication mode determined based on the fact that the hand switch is connected to another controller while the power switch is ON is reset. As the communication mode re-determining unit for re-determining the communication mode, a reset signal output unit that outputs a reset signal to the controller in response to the hand switch being connected to another controller, as in the above-described embodiment, A mode reset unit that resets a communication mode that has been confirmed in response to the controller being reset, and a mode re-decision unit that re-establishes the communication mode based on the reset of the communication mode. Of course, it is not limited to the ones that have been changed, and it is possible to control the connection by connecting the hand switch to another controller. A detection circuit (for example, a combination of a shunt resistor and a comparator) that detects that the charge current of the sensor has decreased is provided in the handheld switch, and the communication mode that has been determined based on the detection of the decrease is reset. It is possible to carry out the operation even if the communication mode is determined again.

It is a schematic perspective view of an electric bed. It is a front view of a hand switch. It is a block circuit diagram which shows the connection state of a hand switch and a controller.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric bed 4 Hand switch 6 Controller 7a Power switch 13 Control part 16 Reset signal output circuit 17 Reset circuit

Claims (3)

When connecting a hand switch for outputting a drive control command to the controller that drives the actuator system provided in the electric actuator in a detachable manner by wire,
A power switch;
Switches that output switch commands necessary to drive the actuator system;
A communication mode capturing means in which a plurality of communication modes to the controller are captured;
A communication mode determining means for determining a communication mode of the connected controller based on an ON operation of a power switch;
Communication mode re-establishing means for resetting the determined communication mode and re-establishing the communication mode based on the fact that the hand switch is connected to another controller while the power switch is ON. A communication mode determination device for a hand switch in an electric actuator characterized by the above.   The communication mode reconfirming means includes a reset signal output means for outputting a reset signal to the controller when the hand switch is connected to another controller, and a communication mode determined after the controller is reset. 2. The motorized operation according to claim 1, further comprising mode resetting means for resetting the mode and mode re-establishing means for resetting the communication mode when the communication mode is reset. Device for determining the communication mode of the hand switch in the motive.   The communication mode re-establishing unit is a mode reset unit that resets the communication mode that has been confirmed when the hand switch is connected to another controller, and the communication mode is re-confirmed based on the reset of the communication mode. The apparatus for determining the communication mode of the hand switch in the electric actuator according to claim 1, further comprising a mode re-determining unit configured to perform the operation.

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