JPH0744003U - Model power supply device - Google Patents

Abstract

(57) [Abstract] [Purpose] In a model such as a radio controlled car, the LE installed on the cover without wiring from the main body to the cover.
Turn on D etc. [Structure] An oscillator 33 and a transmission coil 34 are provided in the main body, and an alternating magnetic field is generated from the transmission coil 34. Also,
A receiving coil 35 is provided on the cover, and a current (pulsating current) is caused to flow through the LED 5 by electromagnetic induction from the transmitting coil 34.
Turn on ED5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a model power supply device that is suitable for use in supplying necessary power to various parts of a model such as a radio controlled car.

[0002]

[Prior art]

 The configuration of a conventional radio controlled car will be described with reference to FIG. In the drawing, reference numeral 1 denotes a vehicle main body, and mounting members 11 and 12 project upward from both ends thereof. Reference numeral 2 is a cover simulating the outer shape of an automobile, which is made of a synthetic resin thin plate. The cover 2 is provided with through holes 21 and 22. By fitting these through holes into the tip ends of the mounting members 11 and 12, the cover 2 can be mounted on the vehicle body 1. ing. A battery 13 is provided in the vehicle body 1, and its output is supplied to the controller 14. The control unit 14 is configured to receive a wireless control signal from a controller (not shown) operated by a user and drive each unit of the radio controlled car.

Further, in recent radio controlled cars, not only each part of the vehicle body 1 is driven, but also various accessories are attached to the cover 2 to enable more interesting operations. For example, the radio controlled car shown in FIG. 3 is provided with an LED 5 imitating a brake lamp of an actual vehicle and an LED 6 imitating a headlight. These LEDs 5 and 6 are connected to the control unit 14 via wires 7 and 8, and can be appropriately turned on according to the operation of the controller.

[0004]

[Problems to be solved by the device]

 By the way, the discharge time of the battery 13 is relatively short, and depending on the type of radio controlled car, it is necessary to replace or charge the battery 13 after operating for about 5 to 10 minutes. Therefore, the user needs to frequently attach / detach the vehicle body 1 and the cover 2 by detaching / attaching the cover 2 from the attachment members 11 and 12. However, at that time, there is a possibility that the wires 7 and 8 may be pulled with an unreasonable force, and this may damage the wires 7 and 8. On the other hand, if the wires 7 and 8 are made sufficiently long, the above problem can be solved to some extent, but if the wires 7 and 8 are made long, the wires 7 and 8 may become entangled in rotating parts such as the wheels 17 and 18. In recent years, some radio-controlled cars can run at speeds of around 40 km / h, and if such an accident occurs, the radio-controlled cars will be greatly damaged.

Further, the radio control car has a strong hobby, and many users are not tired of the cover 2 provided by the manufacturer and often deform or repaint the cover 2. In this case, in the configuration of FIG. 3, it is necessary to remove the wires 7 and 8 and reconnect the cover 2 after repainting, which is extremely complicated and inconvenient. The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to provide a model power supply device in which the main body part and the cover can be completely separated by a simple operation, and the risk of damage is extremely small. .

[0006]

[Means for Solving the Problems]

 In order to solve the above problems, according to the present invention, there is provided a model power supply device for a model, which comprises a main body part on which a direct current power source part of the model is mounted, and a cover mounted on the main body part. An oscillator that is provided in the main body and outputs an alternating current when the output voltage of the direct current power supply is applied; a transmitter coil that is provided in the main body and is supplied with the alternating current from the oscillator; and a cover. It is characterized in that it is provided with a receiving coil which is provided and which is close to the transmitting coil in a state where the main body portion and the cover are mounted and which is coupled to a predetermined load.

[0007]

[Action]

 When the oscillator outputs an alternating current with the cover attached to the main body, this alternating current flows through the transmitting coil, and an alternating magnetic field is generated around the transmitting coil. A current flows through the receiving coil due to electromagnetic induction by the alternating magnetic field, and this current is supplied to the load.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to FIG. In the figure, parts corresponding to those in FIG. 3 are designated by the same reference numerals, and description thereof will be omitted. In the figure, reference numeral 15 is an inverted L-shaped mounting member, which is fixed to the vehicle body 1. Reference numeral 16 denotes a mounting member provided with the cover 2 so as to face the mounting member 15. Power supply devices 3 and 4 are provided between the mounting members 15 and 16. Here, the configuration of the power supply device 3 will be described with reference to FIG.

In FIG. 2, the power feeding device 3 is composed of a primary side member 31 and a secondary side member 32 provided separately from the primary side member 31, and the primary side member 31 is fixed to the mounting member 15. The secondary member 32 is fixed to the mounting member 16. The primary side member 31 and the secondary side member 32 are arranged so as to be close to each other when the cover 2 is mounted on the vehicle body 1. Here, inside the primary member 31, an oscillator 33 that generates an alternating current when a direct current voltage is applied via the controller 14 and a transmission coil 34 to which the alternating current output from the oscillator 33 is supplied. Is provided. Further, inside the secondary member 32, there is provided a receiving coil 35 provided at a position facing the transmitting coil 34 and coupled to the LED 5. The power feeding device 4 is also configured similarly to the power feeding device 3.

In the above configuration, when a DC voltage is applied to the oscillator 33 via the control unit 14, an AC current is output from the oscillator 33, and this AC current is supplied to the transmission coil 34. As a result, an alternating magnetic field is generated around the transmitting coil 34, and an induced electromotive force due to this alternating magnetic field is generated in the receiving coil 35. When this induced electromotive force is applied to the LED 5, a pulsating current flows through the LED 5 to turn on the LED 5. Similarly, when a DC voltage is applied to the power supply device 4, the LED 6 lights up.

It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made. For example, the primary member 31 and the secondary member 32 in FIG. 2 may be modified as shown in FIG. In FIG. 4, the oscillator 33 is constructed so that the oscillation frequency is about 40 kHz. Further, the receiving coil 35 and the capacitor 40 are connected in parallel, thereby forming a resonance circuit having a frequency of 40 kHz. According to the above configuration, since the oscillation frequency of the oscillator 33 and the resonance frequency of the secondary side member 32 match, the impedance of the secondary side member 32 becomes small, and the primary side member 31 moves to the secondary side member 32. It is possible to improve power transmission efficiency. According to the experimental results by the present inventors, the transmission efficiency is only about 30% when the electromagnetic induction is simply used as shown in FIG. 2, whereas the transmission efficiency is reduced when the resonance phenomenon is used as shown in FIG. It has been found that it can be improved to about 70%.

[0012]

[Effect of device]

 As described above, according to the model power supply device of the present invention, the oscillator and the transmitting coil are provided in the main body, and the receiving coil is provided in the cover to supply the current to the load. Therefore, the cover is removed from the main body. In this case, they can be completely separated. Further, since the wire connecting the main body and the cover can be eliminated, the wire will not be damaged when the battery is replaced.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view showing the configuration of a radio controlled car according to an embodiment.

FIG. 2 is a block diagram showing a main part of one embodiment.

FIG. 3 is a partially cutaway plan view of a conventional radio controlled car.

FIG. 4 is a circuit diagram showing a main part of a modified example of the embodiment.

[Explanation of symbols]

 1 Vehicle Main Body (Main Body) 2 Cover 5 LED (Load) 13 Battery (DC Power Supply) 14 Controller (DC Power Supply) 33 Oscillator 34 Transmitting Coil 35 Receiving Coil

Claims (1)

[Scope of utility model registration request] 1. A main body part on which a DC power supply part of a model is mounted,
A model power supply device used for a model comprising a cover attached to the main body, wherein the oscillator is provided in the main body and outputs an alternating current when an output voltage of the direct current power supply is applied, A transmission coil that is provided in the main body and to which the alternating current is supplied from the oscillator; and a cover that is provided in the cover and that is close to the transmission coil when the main body and the cover are mounted A model power supply device comprising: a receiving coil coupled to the.