JP2015177939A - Electronic apparatus and power source supply method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic apparatus and a power source supply method capable of controlling a power supply of a radio reception driving device in conjunction with an outside switch connected to the radio reception driving device even while the radio reception driving device is attached to a battery storage part.SOLUTION: An electronic apparatus determines the on/off state of an outside switch 104 connected to an outside switch detector 303 of a radio reception driving device 30. When determined as an on-state, the electronic apparatus supplies a power to a radio reception part 304, and when determined as an off-state, the electronic apparatus does not supply a power to the radio reception part 304. Thereby, a power supply of the radio reception driving device 30 in conjunction with the outside switch 104 connected to the radio reception driving device 30 can be controlled even while the radio reception driving device 30 is attached to a battery storage part 101.

Description

  The present invention relates to an electronic device and a power supply method.

  There is a wireless system that enables an electric toy that moves at a constant speed to be wirelessly controlled by turning on a switch. In such a system, the wireless reception driving device is supplied with power by installing a battery or by turning on the power supply switch of the device body after the battery is installed. After that, unless the wireless reception driving device is taken out from the battery housing and the battery is removed or the power supply switch of the device main body is turned off, the energized state is maintained and the current continues to flow.

  Patent Document 1 describes the configuration of this wireless reception driving device.

Utility model registration No. 3143765

  In the technique described in Patent Document 1, there is no technical description regarding the power supply control of the wireless reception driving device. Actually, a power supply switch is provided in the apparatus body, and the user operates this switch to supply power. Control. Therefore, in order to stop the power supply of the wireless reception driving device, there is a problem that the battery storage unit must be opened and the battery removed every time or the switch of the device main body must be turned off. In such a moving electric toy, in consideration of safety, the lid of the battery housing part is often fixed with a screw, and the troublesomeness is further increased. If it is left as it is, the battery will run out the next time, so the trouble of having to prepare a new battery and replace it has become obvious.

  Therefore, the present invention has been made in view of the above-described circumstances, and is interlocked with an external switch connected to the wireless reception driving device, for example, a switch of an electric toy, even with the wireless reception driving device mounted on the battery housing. An object of the present invention is to provide an electronic device and a power supply method capable of controlling the power supply of the wireless reception driving device.

  Some aspects of the present invention are a wireless reception driving device including a wireless reception driving circuit and a battery including an external switch state detection unit, a wireless reception unit, and a driving signal generation unit, wherein the battery is attached to the device. The external switch state detection unit determines whether or not an external switch connected to the device is turned on for a period of time, and when the external switch is on, power supply to the wireless reception unit is performed. The electronic device is characterized in that when the external switch is in an OFF state, power is not supplied to the wireless reception unit.

  According to another aspect of the present invention, there is provided a power supply method in a wireless reception driving device including an external switch state detection unit, a wireless reception unit, a driving signal generation unit, and a battery, and the apparatus includes: The external switch state detection unit determines whether or not an external switch connected to the device is turned on while the battery is mounted. When the external switch is on, the wireless reception unit A power supply method comprising: supplying power to the wireless receiver; and not supplying power to the wireless receiver when the external switch is off.

  According to the present invention, the on / off state of the external switch to which the external switch detection unit of the wireless reception driving device is connected is determined, and when it is determined to be on, power is supplied to the wireless reception unit, and the off state If it is determined that the power is not supplied to the wireless receiver. As a result, even when the wireless reception driving device is mounted on the battery storage unit, the power supply of the wireless reception driving device can be controlled in conjunction with an external switch connected to the wireless reception driving device, for example, a switch of an electric toy.

It is the schematic which showed the structure of the radio | wireless system in embodiment of this invention. It is a block diagram for demonstrating the operation example of the radio | wireless reception drive device by embodiment of this invention. It is a circuit block diagram for demonstrating the operation example of the radio | wireless reception drive device by embodiment of this invention. 5 is a timing chart for explaining an operation example of the wireless reception driving apparatus according to the embodiment of the present invention. 5 is a timing chart for explaining an operation example of the wireless reception driving apparatus according to the embodiment of the present invention. 5 is a flowchart illustrating a power supply processing procedure of the wireless reception driving apparatus according to the embodiment of the present invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram illustrating a configuration of a wireless system according to the present embodiment. In the illustrated example, the wireless system 1 includes an electric toy 10 and an electronic device 20.

  The electric toy 10 is, for example, an electric toy such as a miniature train that moves at a constant speed by turning on a switch or a miniature car. In the illustrated example, the electric toy 10 includes a battery storage unit 101, a battery terminal A102, a battery terminal B103, an external switch 104, a motor 105, a wheel A106, and a wheel B107.

  The electronic device 20 is, for example, an electronic device such as a smartphone, a mobile phone, a tablet terminal, or a radio control transmitter. In the example illustrated, the electronic device 20 includes a display unit 201 and an operation unit 202.

  The wireless reception driving device 30 is, for example, an electronic device that receives a wireless signal containing a motor output instruction from the electronic device 20, generates a motor driving signal according to the instruction, and outputs a driving signal. In the illustrated example, a battery 301 and a wireless reception driving circuit 302 are provided.

  The battery storage unit 101 stores the wireless reception driving device 30.

  The battery terminal A102 and the battery terminal B103 are contacts that electrically couple the wireless reception driving device 30, the external switch 104, and the motor 105.

  The external switch 104 is connected in series between the wireless reception driving device 30 and the motor 105, and when the switch is turned on, the wireless reception driving device 30 and the motor 105 are electrically connected. Further, the radio reception driving device 30 and the motor 105 are electrically disconnected by switching off.

  When the external switch 104 is on, the motor 105 stops rotating or increases / decreases the rotation speed according to the drive signal output of the wireless reception drive device 30.

  The wheel A106 rotates freely.

  The wheel B107 rotates in conjunction with the rotational movement of the motor 105.

  The display unit 201 displays a motor output instruction amount. In the illustrated example, the current motor drive signal output value between the motor drive signal output value 0% (no drive signal output) and 100% (drive signal output value maximum) at the position of the slide bar 203 is shown.

  The operation unit 202 changes the output instruction amount of the motor. In the illustrated example, the output instruction amount of the motor 105 is changed by pinching and moving the slide bar 203.

  The battery 301 is mounted inside the wireless reception driving device 30. The wireless reception driving device 30 may be mounted inside as a replaceable structure.

  The wireless reception drive circuit 302 determines whether or not the external switch 104 connected to the wireless reception drive device 30 is turned on while the battery 301 is attached, and when the external switch 104 is on, Power is supplied to the wireless reception unit in the wireless reception drive circuit 302, and a wireless signal containing a motor output instruction from the electronic device 20 is received.

  When the motor output instruction value from the electronic device 20 is 0%, the motor drive signal is not output. When the motor output instruction value from the electronic device 20 is 100%, the maximum motor drive signal output is output.

  In one embodiment, the motor drive output signal can be a PWM (Pulse Width Signal Modulation) signal.

  Further, when the external switch 104 is in an off state or the wireless reception driving device 30 is detached from the battery storage unit 101, the power supply to the wireless reception unit in the wireless reception driving circuit 302 is stopped.

  FIG. 2 is a conceptual diagram divided into functional blocks based on the flow of electrical signals of the electric toy 10.

  The battery unit 301 ′ is included in the wireless reception driving device 30 and supplies power to the wireless reception driving circuit 302.

  The wireless reception drive circuit 302 includes an external switch detection unit 303, a wireless reception unit 304, and a drive signal generation unit 305.

  The external switch unit 104 ′ electrically connects or disconnects the radio reception driving circuit 302 and the motor unit 105 ′.

  The motor unit 105 ′ converts the motor drive signal output from the wireless reception drive device 30 into a rotational motion.

  The operation of the wireless reception driving circuit 302 will be described based on the flow of electrical signals. It is assumed that the battery unit 301 ′ and the wireless reception driving device 30 are mounted.

  The external switch detection unit 303 starts an external switch operation when the battery unit 301 ′ is attached. The external switch detection unit 303 detects an on state or an off state of the external switch unit 104 ′. The external switch detection unit 303 supplies power to the wireless reception unit 304 when the external switch unit 104 ′ is on. Further, when the external switch unit 104 ′ is in an off state, power supply to the wireless reception unit 304 is stopped.

  The wireless reception unit 304 receives a motor output instruction value from the electronic device 20 while power is supplied.

  The drive signal generation unit 305 generates a PWM (pulse width signal modulation) signal based on the received motor output instruction value, and amplifies the motor drive signal output.

  When the motor output instruction value is 0%, a signal with a duty ratio of 0% (only low level) is generated. When the motor output instruction value is 50%, a signal with a duty ratio of 50% (the ratio between the low level and high level is half) is generated. In the case of 100%, a signal with a duty ratio of 100% (only high level) is generated.

  The drive signal output generated by the drive signal generation unit 305 is transmitted to the motor unit 105 'to rotate the motor.

  FIG. 3 is a circuit configuration diagram of the wireless reception driving device 30.

  The wireless reception driving device 30 includes a battery 301 and a wireless reception driving circuit 302.

  The wireless reception drive circuit 302 includes an external switch detection circuit 401, a wireless reception circuit 402, and a drive circuit 403.

  The external switch 104 and the motor 105 are electrically connected through the battery terminal A102 and the battery terminal B103.

  The external switch detection circuit 401 includes a DC-DC converter 410, an OR circuit 411, a diode 412, a resistor 413 and a capacitor 414. In the illustrated example, when the external switch 104 is turned on, the logical sum input 411 (1) becomes high level, the logical sum circuit 411 output becomes high level, the DC-DC converter 410 output also becomes high level, and the wireless reception circuit 402 Among them, power supply to the power input port 422 of the wireless module 421 is started.

The wireless reception circuit 402 includes a wireless module 421 and an antenna 423. In the illustrated example, the wireless module 421 is a module equipped with a short-range wireless standard capable of wireless communication with the electronic device 20 such as Bluetooth or radio control wireless. The wireless connection with the electronic device 20 is started by the power supply from the external switch detection circuit 401, and the motor output instruction is awaited.

  When the motor output instruction value is 0%, the wireless module 421 generates a signal with a duty ratio of 0% (only low level) in advance, and when 50%, the wireless module 421 generates a duty ratio of 50% (low level and high level). When the signal is 100%, a signal with a duty ratio of 100% (only high level) is generated and output from the drive signal output port 424.

  An output signal from the drive signal output port 424 is input to the drive circuit 403 and amplifies the motor drive current.

  The drive circuit 403 includes a transistor 431 and a resistor 432. In the illustrated example, when the drive signal output is at a low level, the transistor 431 is turned off, and no current flows through the motor 105 and the motor 105 does not rotate. When the drive signal output is at a high level, the transistor 431 is turned on, a current flows through the motor 105, and rotation starts. When it becomes low level again, rotation will fall gradually by the coil characteristic which a motor has. Here, when the drive signal output becomes a high level again, the rotation becomes faster again. Using this characteristic, an arbitrary motor 105 can be rotated at a rotational speed by PWM control.

  Here, in the external switch detection circuit 401, since the transistor 431 is turned on when the drive signal output becomes high level, the logical OR input 411 (1) changes to low level, but at the same time, the logical OR input 411 (2 ) Becomes high level, the power input to the wireless reception circuit 402 is maintained.

  When the external switch 104 is switched from ON to OFF during the period in which the drive signal output is low level, the external switch detection circuit 401 also changes the logical OR input 411 (1) to low level, and the output of the OR circuit 411 is The output becomes low level, the output of the DC-DC converter 410 also becomes low level, and power input to the wireless reception circuit 402 is stopped.

In the example shown in the figure, if the drive signal output continues to be output at a duty ratio of 100%, the logical sum input 411 (2) continues to be at the high level while the drive signal output is at the high level. The state cannot be detected.

  In order to reliably detect the state of the external switch 104, the maximum value of the motor output instruction value is set to a maximum value less than 100%, or a maximum value less than 100% of the maximum duty ratio of the program of the wireless module 421. May be.

  In the illustrated example, power is supplied to the external switch detection circuit 401 by mounting the battery unit 301 ′. However, by appropriately selecting the resistor 413, the external switch state can be changed with little power consumption. Can be detected. Normally, the wireless reception circuit 402 consumes power in the order of milliwatts. Therefore, the external switch 104 automatically detects the off state and stops the power supply of the wireless reception circuit 402 by itself. Can be prevented.

  FIG. 4 is a timing chart showing signal levels of the respective circuits from when the external switch 104 is turned on until the external switch 104 is turned off while the drive signal output is in the low level period.

  FIG. 5 is a timing chart showing the signal level of each circuit when the external switch 104 is turned off while the drive signal output is in the high level period after the external switch 104 is turned on.

  When the external switch 104 is turned on (time t 1), the logical sum input 411 (1) becomes high level, and at the same time, the output of the logical sum circuit 411, that is, the power input port 422 becomes high level, and power is supplied to the wireless reception circuit 402. Is done.

  When the motor output instruction value is received from the electronic device 20 (time t2), when the motor output instruction value is 0%, the wireless module 421 generates a signal with a duty ratio of 0% (low level only), and 50 In the case of%, a signal with a duty ratio of 50% (the ratio between the low level and the high level is half) is generated, and in the case of 100%, a signal with a duty ratio of 100% (only the high level) is generated, and the drive signal Output from the output port 424.

  Since the transistor 431 is turned on when the drive signal output becomes high level, the logical OR input 411 (1) changes to low level, but at the same time, the logical OR input 411 (2) becomes high level. The output of the circuit 411, that is, the power input port 422 is maintained at a high level.

  In FIG. 4, when the external switch 104 is turned off (time t3) while the drive signal output is at the low level, the logical sum input 411 (1) changes to the low level, and the logical sum circuit 411 output, that is, the power input The port 422 is also at a low level, and power input to the wireless reception circuit 402 is stopped.

  In FIG. 5, even when the external switch 104 is turned off (time t3 ′) while the drive signal output is at the high level, the OR input 411 (2) continues to be at the high level, so the drive signal output is at the low level. The power input to the wireless reception circuit 402 is maintained until the level is reached (time t4).

  In order to reliably detect the state of the external switch 104, the maximum value of the motor output instruction value is set to a maximum value less than 100%, or a maximum value less than 100% of the maximum duty ratio of the program of the wireless module 421. May be.

  Next, with reference to FIG. 2 and FIG. 6, the power supply processing procedure of the radio reception driving device 30 will be described. FIG. 6 is a flowchart showing the power supply processing procedure of the wireless reception driving device 30.

(Step S101) The external switch operation (Step S102) is started by mounting the battery unit 301 ′.
(Step S102) The external switch detection unit 303 detects an on state or an off state of the external switch unit 104 ′. If the external switch unit 104 ′ is on, the process proceeds to step S103. If the external switch unit 104 ′ is off, the process proceeds to step S104.

(Step S <b> 103) The external switch detection unit 303 turns on the power supply of the wireless reception unit 304. Next, the process proceeds to step S105.
(Step S104) The external switch detection unit 303 turns off the power supply of the wireless reception unit 304. Next, the process proceeds to step S102.

(Step S105) The wireless reception unit 304 receives the motor output instruction value from the electronic device 20 while the power is supplied. If the motor output instruction value is received, the process proceeds to step S106. If the motor output instruction value has not been received, the process proceeds to step S102.
(Step S106) The drive signal generation unit 305 generates a PWM (pulse width signal modulation) signal based on the received motor output instruction value, amplifies the motor drive signal output, and transmits the amplified signal to the motor unit 105 ′. Rotate. Next, the process proceeds to step S102.

  As described above, in this embodiment, the on / off state of the external switch 104 to which the external switch detection unit 303 of the wireless reception driving device 30 is connected is determined, and if it is determined to be on, the power to the wireless reception unit 304 is determined. If it is determined that the wireless receiver 304 is off, power is not supplied to the wireless receiver 304. Thus, even when the wireless reception drive device 30 is mounted on the battery housing 101, the power supply of the wireless reception drive device 30 is controlled in conjunction with the external switch 104 connected to the wireless reception drive device 30, that is, for example, a switch of an electric toy. can do.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the external switch detection unit 303 includes the DC-DC converter 410, the OR circuit 411, the diode 412, the resistor 413, and the capacitor 414. However, the external switch detection unit 303 uses an ASIC that realizes the same function. Also good.

  In the above-described embodiment, the drive circuit 403 is configured to rotate only in one direction. However, when a plurality of drive signal output ports of the wireless module 421 are prepared and a motor output instruction value in the reverse direction is received. Alternatively, a configuration may be adopted in which the drive signal is generated from a port different from the drive signal output port 424 and the newly prepared reverse rotation transistor is driven in the drive circuit 403 to rotate the motor in both directions. .

DESCRIPTION OF SYMBOLS 1 Wireless system 10 Electronic toy 20 Electronic device 30 Wireless reception drive device 101 Battery storage part 102 Battery terminal A
103 Battery terminal B
104 External switch 105 Motor 106 Wheel A
107 Wheel B
201 Display Unit 202 Operation Unit 203 Slide Bar 301 Battery 302 Radio Reception Drive Circuit 303 External Switch Detection Unit 304 Radio Reception Unit 305 Drive Signal Generation Unit 104 ′ External Switch Detection Unit 105 ′ Motor Unit 301 ′ Battery Unit 401 External Switch Detection Circuit 410 DC-DC converter 411 OR circuit 412 Diode 413 Resistor 414 Capacitor 411 (1) OR input (external switch)
411 (2) OR input (drive signal)
402 Radio reception circuit 421 Radio module 422 Power input port 423 Antenna 424 Drive signal output port 403 Drive circuit 431 Transistor 432 Resistance

Claims (2)

A wireless reception driving device including a wireless reception driving circuit and a battery including an external switch state detection unit, a wireless reception unit, and a drive signal generation unit,
While the battery is attached to the device, the external switch state detection unit determines whether an external switch connected to the device is turned on, and when the external switch is on, An electronic apparatus that supplies power to a wireless reception unit and does not supply power to the wireless reception unit when the external switch is in an off state. A power supply method in a wireless reception driving device including a wireless reception driving circuit and a battery including an external switch state detection unit, a wireless reception unit, and a driving signal generation unit,
While the battery is attached to the device, the external switch state detection unit determines whether an external switch connected to the device is turned on, and when the external switch is on, A power supply method comprising: supplying power to a wireless reception unit; and not supplying power to the wireless reception unit when the external switch is in an off state.

Images