JPH1040964A - Charging type electric device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the existence of a secondary coil for non-contact charge from preventing discharge of gas generated during secondary battery charging to the outside by forming a gas discharge path to the outside of a device body in an opening portion penetrating a coil bobbin of the secondary coil of a charge type electric device. SOLUTION: In a charging electric device incorporating a secondary coil 3 for electromagnetic, dielectric coupling with a primary coil on a charger side and a secondary battery 2, a gas discharge path (composed of a pipe 21 and a through hole 13) connecting the secondary battery 2 and the device body 1 outside is formed in an opening portion penetration a coil bobbin 30 of the secondary coil 3. When the coil bobbin is a waterproof sealing material integrally molded on an opening portion side thereof, the coil bobbin itself can be a member for gas discharge path, and further when the coil bobbin 30 is a mold of the waterproof sealing material, the coil bobbin 30 can be a member for the gas discharge path without employing additional waterproof sealing material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rechargeable electric device, and more particularly to a rechargeable electric device in which connection with a power supply for charging is performed by non-contact by electromagnetic induction.

[0002]

2. Description of the Related Art A rechargeable battery built in a rechargeable electric device is:
Gas may be generated at the time of charging, and if this gas is hydrogen gas or if the body with a built-in secondary battery has a sealed structure for waterproofing, the gas filled in the body will Explosions can be caused by sparks from motors and switches. For this reason, in a waterproof type rechargeable electric device, a hole is provided at a location where a connection to a power supply for charging in the body is made, and a tip of a gas release pipe attached to the secondary battery is sealed with a sealing material. The gas generated at the time of charging is discharged outside the body through a pipe.

[0003]

In recent years, there have been many waterproof rechargeable devices which are connected to a power supply for charging without contact by electromagnetic induction.
When placing the secondary coil for electromagnetic induction coupling with the primary coil on the charger side inside the case, place the secondary coil close to the inner surface of the case to achieve good coupling with the primary coil. At this time, the existence of the secondary coil hinders the projecting of the pipe of the secondary battery out of the body, and there are many restrictions on the arrangement of parts. turn into.

[0004] The present invention has been made in view of such a point, and it is an object of the present invention that the presence of a secondary coil for non-contact charging reduces the gas generated during charging of the secondary battery. An object of the present invention is to provide a rechargeable electric device which does not hinder emission to the outside.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a rechargeable electric device having a built-in secondary coil for electromagnetic induction coupling with a primary coil on a charger side and a built-in secondary battery. Is characterized in that a gas discharge path connecting the secondary battery and the outside of the body is formed in an opening penetrating the coil bobbin of the secondary coil. The presence of the secondary coil does not hinder the securing of the gas discharge path.

At this time, if the coil bobbin is integrally formed with a waterproof sealing material on the opening side, the coil bobbin itself can be used as a member for forming a gas discharge path.
Furthermore, if the coil bobbin is formed as a molded product of a waterproof sealing material, the coil bobbin can be used as a member for forming a gas discharge path without using a separate waterproof sealing material.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described. The rechargeable electric apparatus shown in FIGS. 1 and 2 is an electric razor, and has a cylindrical housing 10 and a lower end opening of the housing 10 which is closed. A secondary battery 2 such as a nickel cadmium battery or a nickel metal hydride battery is accommodated in a housing 1 composed of a lower cover 11 and a chassis 15. A secondary coil 3 for non-contact charging by electromagnetic induction is accommodated in a lower end portion of the housing 1.

In the secondary battery 2, the anode side, which generates gas at the time of charging, is housed with the anode facing downward, and a small hole is formed at the tip for gas release from the anode. The anode of the secondary battery 2 including the connection portion of the pipe 21 is provided with a packing 2.
0 and the tube 22 are hermetically sealed. The gas generated during charging flows only to the pipe 21 side.

The lower cover 11 is fixed to the lower end of the chassis 15 with screws 16 and has a seal packing 17 in contact with the chassis 15 and the housing 10 at the opening edge. The boss portion 12 is provided with a through hole 13 in the vertical direction. A plurality of grooves 14 running in the vertical direction are cut in the inner surface on the lower end side of the through hole 13, and further, a plug is provided. 18 is fitted.

The secondary coil 3 includes a coil bobbin 30
The coil bobbin 30 here has an opening penetrating the center thereof, and the boss 12 of the lower cover 10 is provided.
Is attached to the inner surface side of the lower cover 10 in a state where it is passed through the opening. The pipe 21 of the secondary battery 2 has a tip facing the inside of the through hole 13 of the boss 12, and the sealing material 19 attached to the tip of the boss 12 is a pipe 21.
It is in contact with the outer peripheral surface.

In this case, the secondary coil 3 is located between the secondary battery 2 and the gas discharge portion (through hole 13) of the body 1 even though the secondary coil 3 is located between the secondary battery 2 and the gas discharge portion (through hole 13). The pipe 21 and the through hole 13 are arranged in the central opening of the coil bobbin 30 to form a discharge path for gas generated during charging, thereby ensuring a gas discharge path. The stopper 18 provided in the through hole 13 is for preventing the large through hole 13 from opening on the lower surface and keeping the appearance good. However, the groove 14 does not close the groove 14 and is not gas. Is released through the plurality of grooves 14. The boss portion 12 of the lower cover 11 corresponds to FIG.
As shown in the figure, the outer peripheral surface is provided with a plurality of vertical ribs 12a, and the secondary coil 3 is positioned on the lower cover 11 by press-fitting the boss portion 12, and further, is mounted on the chassis 15 by the lower cover 11. Is fixed between the chassis 15 and the lower cover 11 by the screws 16.

FIG. 3 shows another example. Here, a waterproof sealing material 33 is integrally formed on the inner peripheral surface of the opening penetrating through the center of the coil bobbin 30 of the secondary coil 3 and on the upper and lower surfaces of the coil bobbin 30. 2
The pipe 21 is inserted into the lower cover 11, and the inner surface of the lower cover 11 is brought into contact with the waterproof seal material 33, so that the gas discharge path surrounded by the waterproof seal material 33 is formed between the through hole 13 provided in the lower cover 11 and the pipe 21. Has formed. In this case, since the diameter of the through hole 13 formed in the lower cover 11 can be reduced, the appearance can be kept good, and the secondary coil 3 can be piped to the chassis 15 holding the secondary battery 2. In the state temporarily held at 21, the secondary coil 3
Can be assembled, thereby facilitating the assembly.

As shown in FIG. 4, the coil bobbin 30 of the secondary coil 3 itself may be formed of a waterproof sealing material. Since a separate waterproof seal member is not required, cost can be reduced.

[0014]

As described above, according to the present invention, there is provided a rechargeable electric device having a built-in secondary coil for electromagnetic induction coupling with a primary coil on the charger side and a built-in secondary battery. Since the gas discharge path connecting the secondary battery and the outside of the body is formed in the opening penetrating the coil bobbin of the secondary coil, the gas generated when the secondary battery is charged due to the presence of the secondary coil is formed. It does not hinder the securing of a gas discharge path for discharging gas to the outside, and the restriction on the arrangement of the secondary battery and the secondary coil is reduced, so that it is easy to obtain a preferable component arrangement. .

If the coil bobbin is integrally formed with a waterproof sealing material on the opening side, the coil bobbin itself can be used as a member for forming a gas discharge path, so that the component configuration and the shape of the component itself can be simplified. If the coil bobbin is formed as a molded product of a waterproof sealing material, the coil bobbin can be used as a member for forming the gas discharge path without using a separate waterproof sealing material, which is a preferable result in cost reduction. Can be obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part of one embodiment.

FIG. 2 is a cross-sectional view of the same.

FIG. 3 is a longitudinal sectional view of a main part of another example.

FIG. 4 is a longitudinal sectional view of a main part of another example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 2 Secondary battery 3 Secondary coil 30 Coil bobbin

Claims (3)

[Claims] 1. A rechargeable electric device having a built-in secondary coil for electromagnetic induction coupling with a primary coil of a charger side and a built-in secondary battery, penetrating a coil bobbin of the secondary coil. A rechargeable electric device characterized in that a gas discharge path connecting a secondary battery and the outside of a body is formed in an opening that is formed. 2. The rechargeable electric device according to claim 1, wherein the coil bobbin is integrally formed with a waterproof sealing material on an opening side thereof. 3. The rechargeable electric device according to claim 1, wherein the coil bobbin is a molded product of a waterproof sealing material.