JP3648580B2 - Rechargeable electrical equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rechargeable electric device, and more particularly, to a non-contact type connection to a power source for charging by electromagnetic induction.
[0002]
[Prior art]
Many rechargeable devices perform power supply for charging in a non-contact manner by electromagnetic induction. This is remarkable in a device that needs to have a waterproof structure.
In this case, in order to maintain good electromagnetic induction coupling with the primary coil on the charger side, it is required to accurately arrange the secondary coil at a predetermined position on the body of the rechargeable electric device. Conventionally, however, the secondary coil is positioned and fixed by means such as bringing the coil bobbin of the secondary coil into close contact with the inner surface of the vessel body by urging with an elastic body.
[0003]
[Problems to be solved by the invention]
However, since the secondary coil and the elastic body are incorporated, the number of parts is large, the assemblability is not good, and the positioning accuracy cannot be so high.
The present invention has been made in view of these points, and the object of the present invention is to improve the assemblability and the position accuracy of the secondary side coil in the case of having the secondary side coil for non-contact charging. It is in providing a rechargeable electrical device that can.
[0004]
[Means for Solving the Problems]
Therefore, the present invention relates to a rechargeable electric device having a secondary coil for electromagnetic induction coupling with a primary coil on the charger side, and holds the inner bottom surface of the device body and the internal components of the device. The secondary coil disposed between the chassis and the chassis housed in the container is formed as a coil wound around a coil bobbin formed integrally with the container. Alternatively, the coil bobbin formed integrally with the chassis is formed by winding a coil. Since the coil bobbin of the secondary side coil is integral with the body or the chassis, an independent coil bobbin is not required, and the positional accuracy of the secondary side coil can be increased.
[0005]
And, if the screw for coupling the chassis and the body passes through the inside of the coil bobbin, the coupling screw for coupling the chassis and the body can have the role of a core capable of enhancing electromagnetic induction coupling. it can.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
An example of an embodiment of the present invention will be described. The rechargeable electric device shown in FIG. 1 is an electric razor, and is a container 1 including a cylindrical housing 10 and a lower cover 11 that closes a lower end opening of the housing 10. Inside, a secondary battery 2 such as a nickel cadmium battery or a nickel metal hydride battery is housed in a state of being held by a chassis 15. The chassis 15 is inserted into the housing 10 through the lower end opening of the housing 10 and fixed to the housing 10 with screws on the upper end side of the housing 10. In addition to the secondary battery 2, a motor (not shown) And a charging circuit board and the like. The secondary coil 3 for non-contact charging by electromagnetic induction is housed between the lower end surface of the chassis 15 and the lower cover 11 at the lower end portion in the container 1.
[0007]
The secondary coil 3 is configured as a coil bobbin 30 around which a coil 31 is wound. The coil bobbin 30 here is integrally formed on the inner surface side of the lower cover 11 of the body 1. A hollow shaft 16 protruding from the lower end surface of the chassis 15 is fitted in the coil bobbin 30, and a screw 17 inserted from the lower surface side of the lower cover 11 is screwed into the hollow shaft 16. Yes. In the figure, 18 is a packing disposed on the joint surface between the housing 10 and the lower cover 11, and 19 is a packing disposed on the end surface of the coil bobbin 30 and the chassis 15.
[0008]
In the secondary battery 2, the anode side that generates gas at the time of charging is stored facing downward, and a pipe 21 for degassing and having a small hole at the tip is provided from the anode. Projectingly, the tip of the pipe 21 is opposed to the tip of the screw 17 in the hollow shaft portion 16.
The screw 17 that connects the chassis 15 and the lower cover 11 and has a hole penetrating in the axial direction serves as a core in the secondary coil 3 and charges the secondary battery 2. It also serves as a gas flow path for releasing gas that may be released from the secondary battery 2 to the outside.
[0009]
FIG. 2 shows another example, in which the coil bobbin 30 is formed integrally with the chassis 15 at the lower end of the chassis 15. The screw 17 is screwed into the coil bobbin 30 to connect the lower cover 11 and the chassis 15 and to form the aforementioned gas discharge path.
In any of the above examples, the flange portion 32 at the tip of the coil bobbin 30 may be formed separately from the coil bobbin 30 in order to facilitate winding of the coil 31 around the coil bobbin 30.
[0010]
【The invention's effect】
As described above, according to the present invention, when the secondary coil for electromagnetic induction coupling with the primary coil on the charger side is incorporated, the inner bottom surface of the device body and the internal parts of the device are held. Because the coil bobbin of the secondary coil placed between the chassis and the chassis housed in the container is integrally formed with the container or the chassis, an independent coil bobbin is not required, and positioning is fixed. Therefore, the number of components is small and assembly is improved, and the positional accuracy of the secondary coil can be increased. The induction transmission efficiency with the side coil can be maintained at a high value.
[0011]
And, if the screw for coupling the chassis and the body passes through the inside of the coil bobbin, the coupling screw for coupling the chassis and the body can have the role of a core capable of enhancing electromagnetic induction coupling. In order to do so, the efficiency can be further enhanced despite the fact that no dedicated core is required.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an essential part of an example of an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of a main part of another example.
[Explanation of symbols]
1 Body 2 Secondary Battery 3 Secondary Coil 15 Chassis 30 Coil Bobbin 31 Coil

Claims (3)

In a rechargeable electric device having a secondary coil for electromagnetic inductive coupling with a primary coil on the charger side, for holding the inner bottom surface of the device body and the internal parts of the device, The secondary coil arranged between the chassis housed in the body is formed by winding a coil around a coil bobbin formed integrally with the body, and is a rechargeable electric machine. In a rechargeable electric device having a secondary coil for electromagnetic inductive coupling with a primary coil on the charger side, for holding the inner bottom surface of the device body and the internal parts of the device, The rechargeable electric device characterized in that the secondary side coil arranged between the chassis housed in the body is formed by winding a coil around a coil bobbin formed integrally with the chassis. . 3. A rechargeable electric device according to claim 1, wherein a screw for coupling the chassis and the body passes through the coil bobbin.

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