JP6543757B1 - Charging device - Google Patents

Abstract

A charging device for charging an electrically powered device such as a portable terminal or a personal computer using electromotive force generated in a piezoelectric element can easily supply power without manual operation by a user.
A charging device (100) includes a battery (10), an operating member (20) operating as an actuator operable by the electric power of the battery (10), a piezoelectric member (30) generating electric power by the operation of the operating member (20) And a power supply member 40 for supplying the motor-driven device 200.
[Selected figure] Figure 1

Description

  The present invention relates to a charging device for an electrically powered device such as a portable terminal or a notebook computer.

The current mobile terminals such as smartphones and tablets have a problem that their battery life is short and they must be recharged frequently. Generally, the charging operation of the portable terminal has to be performed using a dedicated charger for each portable terminal where there is AC power. In addition, lithium ion batteries are used as a power source for current portable terminals. It is estimated that, in the future, long-life batteries such as improvement of lithium ion batteries and fuel cells will be put to practical use, but have not been put on the market so far. For this reason, in the market, a power generation device capable of charging the battery of the portable terminal by a simple operation is desired.

  Also, conventionally, as an emergency charging means, a device is known which generates power by a piezoelectric element to charge a portable terminal (Patent Document 1). Patent Document 1 discloses that a battery is charged by an electromotive force generated in a piezoelectric element by providing a piezoelectric element in a storage portion of a telescopic antenna of a mobile phone and expanding and contracting the antenna to press the piezoelectric element. ing.

JP, 2004-088385, A

  By the way, in the charging device described in Patent Document 1, in order to generate an electromotive force in the piezoelectric element, an operation to extend and retract the antenna is always required, and such a manual operation is necessary to continue charging the portable terminal. Have to continue. For this reason, there is a problem that charging of the mobile phone is stopped in a situation where the expansion and contraction operation of the antenna can not be performed, for example, the situation where the user is away from the portable terminal or the user sleeps.

  Therefore, the present invention provides a charging device for charging a motor-driven device using electromotive force generated in a piezoelectric element, which can easily supply power without manual operation by a user. With the goal.

  The present invention relates to a charging device for charging an electrically powered device such as a portable terminal. The charging device according to the present invention includes a battery 10, an operating member 20, a piezoelectric member 30, and a power feeding member 40. The battery 10 may be a primary battery or a secondary battery. The operating member 20 is a member operable by the power of the battery 10. The operating member 20 may be operated not only electrically but also manually. The piezoelectric member 30 is a member that generates electric power by the operation of the operating member 20. The power supply member 40 is a member that supplies the electric power generated by the piezoelectric member 30 to the electric device. As described above, by making the operation member 20 generating the electromotive force in the piezoelectric member 30 electrically-operated, charging of a portable terminal or the like can be easily continued without manual operation by the user. Also, the power of the battery 10 is not supplied directly to the motorized device, but the operating member 20 is operated to generate electric power by the piezoelectric member 30, thereby creating a novel feeling of use that is easy to distinguish from general lithium ion batteries and the like. We can provide products.

  In the charging device according to the present invention, the operating member 20 preferably includes a motor 21 and a rotating cam 22 attached to a shaft of the motor 21. In this case, it is preferable that the piezoelectric member 30 includes the piezoelectric element 31 and a leaf spring 33 which is elastically deformed by the rotation of the rotating cam 22 to apply pressure to the piezoelectric element 31. For example, the plate spring 33 may be provided with a collision portion that collides with the piezoelectric element 31, and the piezoelectric element 31 may be caused to generate an electromotive force by striking the piezoelectric element 31 when the plate spring 33 is restored. An electromotive force may be generated in the piezoelectric element 31 by sandwiching the piezoelectric element 31 between a plurality of leaf springs 33 and bending the piezoelectric element 31 when the leaf spring 33 is elastically deformed. By configuring the operation member 20 and the piezoelectric member 30 as described above, the piezoelectric element 31 can efficiently generate power.

  The charging device according to the present invention may further include a switch 60 for turning on and off the connection circuit between the battery 10 and the operation member 20. By operating the switch 60, the operation member 20 automatically operates using the power stored in the battery 10 to start power generation by the piezoelectric member 30, so that the electric device can be charged with a simple operation. . Further, the mode in which the operation member 20 is operated electrically and the mode in which the operation member 20 is operated manually may be switched by turning on and off the switch 60.

  The charging device according to the present invention may further include a reflux circuit 70 for recirculating a part or all of the electric power generated by the piezoelectric member 30 to the battery 10. For example, a part of the electric power generated by the piezoelectric member 30 can be used to charge the electrically powered device, and the surplus can be returned to the battery 10 (secondary battery), or the charging device and the electrically powered device are not connected In such a case, all of the power generated by the piezoelectric member 30 can be returned to the battery 10. In this way, the life of the battery 10 can be extended.

  In the charging device according to the present invention, the operation member 20 may also be operable by manual operation. Thereby, even when the power in the battery 10 is exhausted, for example, the charging can be continued by operating the operation member 20 manually.

  The present invention relates to a charging device for charging an electrically-powered device using electromotive force generated in a piezoelectric element, and has a unique effect that power can be easily supplied without manual operation by the user.

FIG. 1 is a circuit configuration diagram showing an embodiment of a charging apparatus according to the present invention. FIG. 2 shows an example of the configuration of the operating device and the piezoelectric member. FIG. 3 shows another example of the configuration of the operating device and the piezoelectric member.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below, and includes those modified as appropriate from the following embodiments by those skilled in the art within the obvious scope.

  FIG. 1 is a circuit diagram of a charging apparatus 100 according to the present invention. As shown in FIG. 1, the charging device 100 is mainly used for supplying power to the battery 201 provided in the electric device 200 such as a portable terminal or a notebook computer. The charging device 100 is attached to, for example, the outside of the housing of the motor-driven device 200 and connected by a USB cable or a dedicated cable. Alternatively, the charging device 100 can be mounted inside the housing of the electrically powered device 200. The driving of the charging device 100 can be performed at any time regardless of whether the electric device 200 is operated or not operated.

  The charging apparatus 100 includes a battery 10, an operation member 20, a piezoelectric member 30, and a power feeding member 40. In addition, it is preferable that the charging apparatus 100 further include a rectifier circuit 50, a switch 60, and a return circuit 70. Each component will be described below.

  The battery 10 functions as a power source of the operation member 20, and may be a primary battery such as a dry battery or a button battery, or may be a secondary battery such as a lithium ion battery. When using a secondary battery, it is preferable to provide an overcharge prevention function. In addition to chemical batteries such as dry batteries and lithium ion batteries, the battery 10 can also use physical batteries such as photovoltaic cells for converting light energy into electrical energy and thermal batteries for converting thermal energy into electric power.

  The operating member 20 is an actuator that operates using the battery 10 as a power source. Although the representative example of the operation member 20 is the motor 21 that performs rotational movement, it may be a piston that performs forward and backward movement. In the example shown in FIG. 1, the operating member 20 is configured to include the motor 21 and the rotating cam 22. The rotating cam 22 is attached to the shaft of the motor 21 and is configured to rotate as the shaft rotates. It is preferable to use a DC reduction motor as the motor 21. For example, one having a rotational speed of 20 to 48 revolutions / minute is suitable.

The piezoelectric member 30 includes a piezoelectric element 31 that converts pressure due to the operation of the operating member 20 into electric power. A piezoelectric element 31, such as a known piezoelectric film, can be used to generate electrical energy when pressure is applied or when it is deformed. Examples of the material of the piezoelectric film include PVDF (polyvinylidene fluoride), PZT (lead zirconate titanate), BaTiO ₃ (barium titanate), and the like. The thickness of the piezoelectric film is preferably about 20 to 200 μm. The piezoelectric film may be attached to a plate spring or the like to be flexible or may be sandwiched in a sandwich form. A plurality of piezoelectric films may be stacked to increase the output voltage. Moreover, it can replace with a piezoelectric film and can also use piezoelectric ceramics.

  FIG. 2 shows an example of the configuration of the operation member 20 and the piezoelectric member 30. As shown in FIG. As shown in FIG. 2, the rotation cam 22 constituting the operation member 20 is a member attached to the shaft of the motor and rotated electrically. A plurality of cam portions 22a are formed on the rotating cam 22 at intervals in the circumferential direction so as to protrude on the outer periphery thereof.

  On the other hand, in the piezoelectric member 30, the support 35 is provided in the housing of the charging apparatus 100, and the plate spring 33 and the support plate 32 are disposed to face the support 35. The plate spring 33 is an elastically deformable plate-like member having a fixed end fixed to the support portion 35 and a free end opposite to the fixed end, and when the rotation cam 22 rotates, the free end thereof is a cam portion 22a. It is configured to be pushed up contact. The support plate 32 is disposed to face the plate spring 33, and the piezoelectric element 31 (piezoelectric film or piezoelectric ceramic) is provided on the surface facing the plate spring 33. Further, on the surface of the plate spring 33 facing the support plate 32, a plurality of collision parts 34 that collide with the piezoelectric element 31 are provided in a protruding manner. The collision part 34 is configured to collide with the piezoelectric element 31 by its restoring force to apply pressure when the plate spring 33 is elastically deformed by the rotation of the rotation cam 22. The electric power generated by the piezoelectric element 31 is supplied to the battery 201 of the electrically powered device 200 via the rectifier circuit 50 and the power supply member 40.

  FIG. 3 shows another example of the configuration of the operation member 20 and the piezoelectric member 30. As shown in FIG. In the example shown in FIG. 3, the configuration of the piezoelectric member 30 is different from that of FIG. 2, and the operation member 20 basically adopts the same configuration as that of FIG. In the example of FIG. 3, the piezoelectric member 30 has a configuration in which one or more piezoelectric elements 31 are sandwiched between two plate springs 33. Each leaf spring 33 is an elastically deformable plate-like member having a fixed end fixed to the support portion 35 and a free end opposite to the fixed end, and when the rotation cam 22 rotates, the free end thereof is the cam portion 22a. It is pushed up in contact with. When the plate spring 33 is pushed up by the rotation cam 22 and elastically deformed, the plurality of piezoelectric elements 31 (piezoelectric film or piezoelectric ceramic) disposed therebetween are bent. As described above, by causing the piezoelectric element 31 to bend according to the elastic deformation of the plate spring 33, an electromotive force is generated in the piezoelectric element 31. The electric power generated by the piezoelectric element 31 is supplied to the battery 201 of the electrically powered device 200 via the rectifier circuit 50 and the power supply member 40. In the present embodiment, in order to increase the amount of electric power in the piezoelectric portion 30, it is preferable that the number of piezoelectric elements 31 provided between the plate springs 33 be plural, and three or more, or four or more It can also be done.

  The power supply member 40 supplies the electric power generated by the piezoelectric member 30 to the electric device 200. The power supply member 40 may be connected to the electrically powered device 200 by wire or may be wirelessly connected. In the case of wired connection, the power supply member 40 may be provided with the connection terminal 41 and the diode 42 for backflow prevention. In the case of wireless connection, instead of the connection terminal 41, for example, a power transmission coil or the like for non-contact power transmission to the electrically powered device 200 may be provided. A well-known thing can be suitably utilized as such a wireless electric power feeding member.

  The rectifying circuit 50 is a circuit for rectifying the current generated by the piezoelectric member 30, and is disposed between the piezoelectric member 30 and the feeding member 40. The current generated by the piezoelectric member 30 is in the form of random pulses, but is smoothed through the rectifying circuit 50.

  The switch 60 turns on and off the connection circuit of the battery 10 and the operation member 20. When the switch 60 is on, power is supplied from the battery 10 to the operating member 20, and the operating member 20 operates electrically. On the other hand, turning off the switch 60 causes the operating member 20 to stop. In addition, it is also possible to operate the operation member 20 manually while the operation member 20 is stopped. As described above, the electric mode and the manual mode of the operation member 20 can be switched by turning on and off the switch 60.

  The switch 60 may have a timer function that is automatically turned off in a fixed period. As a result, the user only needs to press the switch when starting the charging device. By the timer function, charging of the battery 201 of the electrically powered device 200 can be performed automatically and efficiently, and power consumption of the battery 10 can be suppressed. In addition, it is possible to automatically turn on the switch 60 when the charging device 100 is connected to the electrically powered device 200. Furthermore, an IC chip or the like for monitoring the charge state of the battery 201 of the electrically powered device 200 may be provided to automatically control the on / off of the switch 60 of the charging device 100.

  The reflux circuit 70 is a circuit for recirculating part or all of the electric power generated by the piezoelectric member 30 to the battery 10 (secondary battery). For example, a diode 71 for backflow prevention is disposed in the reflux circuit 70. For example, when the amount of power generation by the piezoelectric member 30 exceeds the amount of supply of the motorized member 200 to the battery 201, the surplus is returned to the battery 10. Further, when the charging of the battery 201 of the electrically powered device 200 is completed, the power supply to the electrically powered device 200 may be stopped at that time, and the entire power generation amount of the piezoelectric member 30 thereafter may be returned to the battery 10 . In addition, when the charging device 100 is not connected to the electrically powered device 200, the power generated by the piezoelectric member 30 is supplied to the battery 10 as it is. By providing the reflux circuit 70 in this manner, the life of the battery 10 can be extended.

  Hereinabove, in order to express the content of the present invention, the embodiments of the present invention have been described with reference to the drawings. However, the present invention is not limited to the above embodiments, and includes modifications and improvements apparent to those skilled in the art based on the matters described in the present specification.

DESCRIPTION OF SYMBOLS 10 ... Battery 20 ... Operating member 21 ... Motor 22 ... Rotation cam 30 ... Piezoelectric member 31 ... Piezoelectric element 32 ... Support plate 33 ... Plate spring 34 ... Collision part 35 ... Support part 40 ... Feeding member 41 ... Connection terminal 42 ... Backflow prevention Diode 50 ... Rectification circuit 60 ... Switch 70 ... Reflux circuit 71 ... Backflow prevention diode 100 ... Charging device 200 ... Electric device 201 ... Battery

Claims (4)

With a battery (10),
An operating member (20) operable by the power of the battery;
A piezoelectric member (30) that generates electric power by the operation of the operating member;
A feed member (40) for supplying the electric power generated by the piezoelectric member to an external electric device;
A return device (70) for returning at least a part of the electric power generated by the piezoelectric member to the battery. The operating member (20) is
With the motor (21)
A rotary cam (22) mounted on the shaft of said motor,
The piezoelectric member (30) is
A piezoelectric element (31),
The charging device according to claim 1, further comprising: a leaf spring (33) that elastically deforms by rotation of the rotation cam and applies pressure to the piezoelectric element. The charging device according to claim 1 or 2, further comprising a switch (60) for turning on / off a connection circuit of the battery (10) and the operation member (20). The charging device according to any one of claims 1 to 3, wherein the operation member (20) is also operable by a manual operation.

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