JPH0441958Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a control device that activates and stops specified controlled elements of a power sprayer using remote control commands from a transmitter. The present invention relates to a control device for a power sprayer that can prevent malfunctions caused by noise or the like.

[Conventional technology]

FIG. 2 is a circuit diagram of a conventional control device for a power sprayer operated by remote control commands from a transmitter. A pair of power supply connection input terminals 1 are connected to the positive and negative output terminals of a DC power supply such as a battery installed in the power sprayer, and the controlled element 2 is composed of, for example, an electromagnetic clutch for controlling the rotation of a hose reel. It is turned on and off by a control device. The control switch 3 consists of an a contact and is turned on by an on command from the transmitter. The excitation coil 4 is connected at one end to one power supply connection input terminal 1 via the control switch 3, and at the other end to the other power supply connection input terminal 1. The output switch 5 is composed of an a contact and is turned on when the excitation coil 4 is energized, and the excitation coil 4 and the output switch 5 constitute a relay. The controlled element 2 receives power from the power supply connection input terminal 1 via the output switch 5 .

When the operator carries a transmitter and turns on a predetermined switch on the transmitter, an on command is sent to the receiver of the power sprayer, and the control switch 3 is turned on. As a result, the excitation coil 4 becomes energized, the output switch 5 is turned on, and power is supplied from the power supply connection input terminal 1 to the controlled element 2.

In this control device, in order to maintain the controlled element 2 in an energized state, it is necessary to continuously transmit an ON command from the transmitter to keep the control switch 3 ON.

[Problem that the invention attempts to solve]

In conventional control devices, if the ON command from the transmitter is not temporarily received by the control device due to radio wave interference such as diffused reflection from buildings, noise from other radio wave sources, etc., the control switch 3 is turned off. As a result, the output switch 5 is turned off, power supply to the controlled element 2 is stopped, and the controlled element 2 malfunctions. Since the remote control command from the transmitter is a weak radio wave, there is a high possibility of malfunction due to such noise.

The purpose of this invention is to provide a control device for a power sprayer that can prevent erroneous operation due to radio wave interference, noise, etc.

[Means for solving problems]

This invention will be explained using the reference numerals in FIG. 1 that correspond to the embodiments.

The power sprayer control device according to this invention includes a first control switch 13 that is turned on in response to an on command from a transmitter, a second control switch 17 that is turned off in response to an off command from the transmitter, and a second control switch 17 that is turned off in response to an off command from the transmitter. a memory switch 15 connected in parallel to the control switch 13; an output switch 16 that causes current to flow to the controlled element 12 when the switch is on; and an operation section that turns on the memory switch 15 and the output switch 16 when the switch is energized. It is equipped with 14. The first control switch 13 and the second control switch 17
and the operating section 14 are connected in series and connected to the power source 1.
Connected to 1.

[Effect]

When an on command is received from the transmitter, the first control switch 13 is turned on. Since the second control switch 17 is on when an off command is not received from the transmitter, the operation section 14
The memory switch 15 is supplied with current through the first control switch 13 and the second control switch 17.
and close the output switch 16. Output switch 1
6 is turned on, the controlled element 12 is supplied with power via the output switch 16 and is turned on. Furthermore, when the memory switch 15 is turned on, the operating unit 14 controls the power supply 11 not only via the first control switch 13 and the second control switch 17 but also via the memory switch 15 and the second control switch 17. is connected to the power supply and remains energized. When reception of the ON command from the transmitter is interrupted due to radio wave interference, noise, etc., the first control switch 13 is turned OFF. However, the operation unit 14 does not control the power supply 1 via the memory switch 15 and the second control switch 17.
1, the memory switch 15 and output switch 16 remain on, and the controlled element 12 receives current from the power source 1 through the output switch 16.
Current is supplied from 1.

After that, when the off command is received from the transmitter,
The second control switch 17 is turned off, and the power supply 11
The supply of current to the operating unit 14 is stopped, the memory switch 15 and the output switch 16 are turned off, the supply of current from the power source 11 to the controlled element 12 is stopped, and the controlled element 12 is turned off. .

After this, due to radio interference, noise, etc., the second
Even if the first control switch 17 is turned on, the memory switch 15 is already turned off, so the operating section 14 will not be energized unless the first control switch 13 is turned on by an on command from the transmitter. Therefore, the controlled element 12 is kept in an off state.

〔Example〕

This invention will be explained below with reference to the embodiment shown in FIG.

FIG. 1 is a circuit diagram of a control device for a power sprayer operated by a remote control command from a transmitter. A pair of power supply connection input terminals 11 are connected to the positive and negative output terminals of a DC power supply such as a battery installed in the power sprayer, and the controlled element 12 is composed of, for example, an electromagnetic clutch for controlling the rotation of a hose reel. It is turned on and off by a control device. The first control switch 13 consists of an a contact and is turned on by an on command from the transmitter. The second control switch 17 consists of a b contact and is turned off by an off command from the transmitter. The excitation coil 14 is connected at one end to one power supply connection input terminal 11 via the first control switch 13 and second control switch 17, and at the other end to the other power supply connection input terminal 11. . Both the memory switch 15 and the output switch 16 are composed of a-contact points, and one end thereof is connected to one of the power supply connection input terminals 11 via a connection line 18, and is turned on when the excitation coil 14 is energized. Excitation coil 14, memory switch 15, and output switch 16 constitute a relay.
The memory switch 15 is connected in parallel to the first control switch 13, and the controlled element 12 is
Input terminal 1 for power connection via output switch 16
Receives power supply from 1.

The operation of the embodiment will be explained.

When an on command is received from the transmitter, the first control switch 13 is turned on. Since the second control switch 17 is on when an off command is not received from the transmitter, the excitation coil 14
is supplied with current through the first control switch 13 and the second control switch 17, closing the storage switch 15 and the output switch 16. When the output switch 16 is turned on, the controlled element 12 is supplied with power via the output switch 16 and becomes in the on state. Furthermore, when the memory switch 15 is turned on, the excitation coil 14 is connected to the power supply not only via the first control switch 13 and the second control switch 17 but also via the memory switch 15 and the second control switch 17. It is connected to the input terminal 11 to maintain the energized state. When reception of the ON command from the transmitter is interrupted due to radio wave interference, noise, etc., the first control switch 13 is turned OFF. However, since the excitation coil 14 receives current from the power supply connection input terminal 11 via the memory switch 15 and the second control switch 17, the memory switch 15
The output switch 16 is kept on, and the controlled element 12 is supplied with current from the power supply connection input terminal 11 via the output switch 16.

After that, when the off command is received from the transmitter,
The second control switch 17 is turned off, the supply of current from the power supply connection input terminal 11 to the excitation coil 14 is stopped, the memory switch 15 and the output switch 16 are turned off, and the controlled The supply of current to the element 12 is stopped, and the controlled element 12 is turned off.

After this, due to radio interference, noise, etc., the second
Even if the first control switch 17 is turned on, the memory switch 15 is already turned off, so unless the first control switch 13 is turned on by an on command from the transmitter, the excitation coil 14 will not be energized. Therefore, the controlled element 12 is kept in the OFF state.

[Effect of idea]

With this device, once the ON command is received from the transmitter and the first control switch is turned on, the memory switch is turned on, so even if the first control switch is turned off due to radio wave interference or noise, etc. ,
The operating portion is kept energized to keep the output switch on and ensure the supply of current to the controlled element. Therefore, it is possible to prevent the controlled element from malfunctioning due to radio wave interference, noise, etc., and to obtain good and stable operation of the power sprayer.

[Brief explanation of the drawing]

Fig. 1 is a control circuit diagram of a power sprayer operated by a remote control command from a transmitter concerning an embodiment of this invention, and Fig. 2 is a power sprayer operated by a remote control command from a transmitter. FIG. 2 is a circuit diagram of a conventional control device. 11...Input terminal for power connection (power supply), 12...
...Controlled element, 13...First control switch, 1
4... Excitation coil (operation unit), 15... Memory switch, 16... Output switch, 17... Second control switch.

Claims (1)

[Scope of utility model registration request] A first control switch 13 that is turned on in response to an on command from the transmitter, and a second control switch 17 that is turned off in response to an off command from the transmitter, are connected in parallel to the first control switch 13. a memory switch 15, an output switch 16 that causes current to flow to the controlled element 12 when turned on, and an operating section 14 that turns on the memory switch 15 and the output switch 16 when energized; A control device for a power sprayer, characterized in that the control switch 13, the second control switch 17, and the operating section 14 are connected in series and connected to a power source 11.