JPH1094685A - Rechargeable electric razor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dry a blade part while utilizing electromagnetic force supplied from a charger and to shorten drying time after washing in water by providing a heating part for generating heat for drying the blade part while receiving the electromagnetic force generated by a primary side coil on the side of the charger. SOLUTION: When charging a secondary battery 10 of an electric razor 1, the electric razor 1 is placed on a charger 3 as shown in the figure (a) and a built-in secondary coil 12 is proximated with a primary coil 31 of the charger and power is transmitted from the side of the charger 3 to the electric razor 1 by electromagnetic induction coupling between the both. After a blade part 2 is washed in water, the electric razor 1 is placed on the charger 3 while being vertically inverted as shown in the figure (b). Then, the outer metallic blade of the blade part 2 is heated by generating an eddy current because of the passage of magnetic flux generated by the primary coil 31 of the charger 3, and the blade part 2 is dried by heat generated by itself.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art There is a rechargeable electric shaver in which power supply for charging is performed in a non-contact manner by electromagnetic induction. This is adopted in a waterproof structure to enable shaving and washing with soap. This is because in both the charger and the electric shaver, the electrical contacts for interconnection do not need to be exposed to the outside, so that it is easy to ensure waterproofness and to prevent short circuit due to moisture.

[0003]

In the case of an electric razor, shavings and grease on the face adhere to the blade, but these are difficult to remove by cleaning with a brush or the like, and the odor tends to remain. However, an electric razor that can be washed with water can surely remove shavings and grease, and can keep the electric razor clean.

[0004] However, the electric razor after washing with water, many water drops remain on its blade portion,
Conventionally, since it was naturally dried, it took a long time to dry. The present invention has been made in view of such a point, and an object of the present invention is to provide a rechargeable electric shaver capable of shortening a drying time after washing with water.

[0005]

SUMMARY OF THE INVENTION The present invention provides a rechargeable electric shaver having a secondary coil for electromagnetic induction coupling with a primary coil on the charger side. It is characterized in that it has a heat generating portion that generates electromagnetic heat generated by drying the blade portion by receiving the electromagnetic force generated by the side coil. The blade is dried using an electromagnetic force supplied from a charger.

As the heat generating portion, the metal outer blade itself in the blade portion can be used, or the heat generating portion may be provided in a detachable protective cap for protecting the blade portion. In the latter case, the heat generating portion may be composed of a second secondary coil and a heat generating element, and the heat generating element at this time may be a Peltier element in addition to the resistance heat generating wire.

The protective cap may be formed of a magnetic material that functions as a heat-generating portion. In this case, the protective cap is formed of metal on the mounting surface side of the electric device and non-magnetic material on the outer surface side. You may. It is preferable that the engaging attachment portion of the protective cap to the electric device is formed of a non-magnetic material. It is also preferable to provide a sublimable deodorant or antibacterial agent in the protective cap.

It is preferable that the heating section receives the electromagnetic force of the primary coil for charging on the side of the electric appliance. In this case, the heating section is disposed at the upper end of the shaver, the secondary coil is disposed at the lower end, and the heating section is connected to the charger. It is good to be able to select a set up and down freely. At this time, it is preferable that the secondary coil is disposed at the bottom or bottom side of the lower end.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described. As shown in FIG. 1, an electric shaver 1 having a blade portion 2 at an upper end includes a secondary battery 10 and a motor 1 inside.
1. A switch 13 with a built-in secondary coil 12
The secondary coil 12 is disposed at the bottom of the lower end. On the other hand, the charger 3 has a built-in primary coil 31 connected to the oscillation circuit 30 and has both ends of the core 32 of the primary coil 31 facing upward.

When charging the secondary battery 10 of the electric shaver 1, the electric shaver 1 is placed on the charger 3 as shown in FIG. By bringing the primary coil 31 close to the power transmission unit, electric power is transmitted from the charger 3 to the electric shaver 1 by electromagnetic induction coupling between the two. When the blade 2 is washed with water,
As shown in (b), the electric shaver 1 is placed upside down on the charger 3. The metal outer blade in the blade portion 2 generates heat by generating an eddy current due to the passage of the magnetic flux generated by the primary coil 31 of the charger 3. The blade part 2 dries by the heat generated by itself. At this time, a temperature sensor 5 for detecting the temperature of the blade 2 of the electric shaver 1 is provided on the charger 3 side, and when the temperature of the blade 2 becomes a predetermined value or more, the oscillation circuit 30 is stopped and the blade 2 is stopped. It is also preferable to keep the temperature of the film from becoming too high.

As shown in FIG. 2, if a recess 34 is provided on the upper surface of the housing of the charger 3 so that the lower end of the electric shaver 1 is fitted, the primary side is used for transmitting power for charging the secondary battery 10. Since the positional relationship between the coil 31 and the secondary coil 12 can be maintained in a predetermined state, efficient power transmission can be performed. As shown in FIG. 3, the concave portion 34 is formed between both ends of the core 32, and when the lower end of the electric shaver 1 is fitted into the concave portion 34, the core 3
If the secondary coil 12 is located between both ends of the power supply 2, more efficient power transmission can be performed.

In the examples shown in FIGS. 2 and 3,
When the electric shaver 1 is turned upside down and the blade portion 2 is dried, the electric shaver 1 is prevented from being fitted into the concave portion 34, but the concave portion 34 or another concave portion provided so as to overlap the concave portion 34 ( The blade portion 2 of the electric shaver 1 may be fitted into the electric shaver 1 (not shown). FIG. 4 shows another embodiment. In this case, it is assumed that the protection cap 4 attached for protecting the blade portion 2 when the electric shaver 1 is not used is formed by the metal magnetic body 40 on the inner surface side and the non-magnetic material 41 on the outer surface side, and FIG. As shown in the figure, when the battery is placed upside down on the charger 3, the metal magnetic body 40 of the protective cap 4 generates heat due to the eddy current due to the passage of the magnetic flux generated by the primary coil 31, thereby promoting the drying of the facing blade portion 2. Note that an engaging portion 43 for attaching the protective cap 4 to the electric shaver 1 is provided in a portion of the non-magnetic material 41 which is a synthetic resin. The surface of the metal magnetic body 40 is mirror-finished so that it can be used as a mirror for shaving.

FIG. 5 shows an example of another embodiment. The point that the primary coil 31 is used for heat generation for accelerating drying and the point where heat is generated in the protective cap 4 during charging are the same as those described above. A dedicated secondary coil 42 for supplying power to the heating element 44 is provided. The heating element 44 may be a Peltier element as shown in FIG. 6 in addition to a resistance heating element such as a nichrome wire.

When the electric shaver 1 is placed on the charger 3 for charging the built-in secondary battery 10, the primary coil 31 of the charger 3 is separated from the secondary coil 42 in the protective cap 4. Therefore, no power is transmitted to the secondary coil 42, but when the battery is placed upside down on the charger 3, a current flows through the secondary coil 42 in the protective cap 4 and the heating element 44 The blade 2 can be dried to generate heat.

Reference numeral 7 in FIG. 6 denotes a deodorant or an antibacterial agent provided on the protective cap 4 and uses a sublimable one. When the blade 2 is dried by the heat of the heating element 44, deodorization or antibacterial action by a sublimable deodorant or antibacterial agent can be performed at the same time. In using the secondary coil, the primary coil 31 of the charger 3 is used for both charging and drying, but the secondary coil is divided into a charging coil and a heating coil. The primary side coil may also be provided with a charging coil and a heating / drying coil. The secondary coil may also be used for charging and heat drying, and a switch provided on the electric shaver 1 may be used to switch between charging and heat drying.

The primary coil 31 of the charger 3 may be arranged at a position shown in the drawing opposite to the secondary coil 12 arranged on the lower side surface of the electric shaver 1 as shown in FIG. In this case, the case where the blade portion 2 is placed upside down is charging, and the case where the blade portion 2 is placed upright is drying. The protective cap 4 shown in FIG. 7 is formed of a magnetic material made of all metals, and urges the blade portion 2 to be dried by heat generated by eddy current.

In each of the above examples, the primary coil and the secondary coil are provided with cores, but may be provided without cores.

[0018]

As described above, the present invention is provided with a heat generating portion for generating heat for drying the blade portion by receiving the electromagnetic force generated by the primary coil on the charger side, and supplied from the charger. Since the blade is dried using the electromagnetic force, the drying time after the blade is washed with water can be reduced.

When the metal outer blade itself in the blade portion is used as the heat generating portion, heat drying can be performed without requiring a new member. Further, when the heat generating portion is provided on the detachable protective cap for protecting the blade portion, the blade portion can be dried without fear of damaging the blade portion. When the protective cap is used, if the heat generating portion is composed of the second secondary coil and the heat generating element, the blade portion can be efficiently heated.

The protective cap may be formed of a magnetic material that functions as a heat generating portion. In this case, it is not necessary to provide a secondary coil or a heating element on the protective cap, and cost can be reduced. Also, if the mounting surface side to the electric equipment is made of metal and the outer surface side is made of a non-magnetic material, the outer surface of the protective cap will not be hot,
It is preferable in terms of handling. Also, if the engagement attachment portion to the electric device in the protective cap is formed of a non-magnetic material,
It is possible to avoid thermal effects on parts other than the blade of the electric razor.

It is also preferable to provide a sublimable deodorant or antibacterial agent in the protective cap. Deodorization and antibacterial can be performed simultaneously. Furthermore, it is not excluded to provide a dedicated primary coil for heating and drying on the charger side, but if the heating part generates heat by receiving the electromagnetic force of the charging primary coil on the electric appliance side, the charger side Costs can be reduced. If the heating unit is arranged at the upper end of the electric shaver and the secondary coil is arranged at the lower end, and the setting to the charger can be selected up and down, the charging and the heating and drying are switched depending on the placement in the charger. Therefore, it is easy to identify the current state. In particular, if the secondary coil is arranged on the end side, both the facing distance between the primary coil and the secondary coil and the distance between the primary coil and the secondary coil for drying the blade are shortened. To be able to
Higher efficiency can be obtained.

[Brief description of the drawings]

FIG. 1 shows an example of an embodiment of the present invention, in which (a)
FIG. 3 is a schematic sectional view at the time of charging, and FIG.

FIGS. 2A and 2B show another example of the above, in which FIG. 2A is a schematic sectional view at the time of charging, and FIG.

FIGS. 3A and 3B show still another example of the above, wherein FIG. 3A is a schematic sectional view at the time of charging, and FIG.

FIGS. 4A and 4B show an example of another embodiment, in which FIG. 4A is a schematic cross-sectional view at the time of charging, and FIG.

FIG. 5 is a schematic sectional view of another example of the above during charging.

FIG. 6 is a perspective view showing another example of the heating element of the above.

7 shows still another example of the above, wherein (a) is a schematic sectional view at the time of charging, and (b) is a schematic sectional view at the time of heat generation and drying.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric razor 2 Blade part 3 Charger 12 Secondary coil

Claims (14)

[Claims] 1. A rechargeable electric shaver incorporating a secondary coil for electromagnetic induction coupling with a primary coil on the charger side, the blade receiving the electromagnetic force generated by the primary coil on the charger side. A rechargeable electric razor comprising a heat generating portion for generating heat for drying the portion. 2. The rechargeable electric shaver according to claim 1, wherein the heat generating portion is a metal outer blade in the blade portion. 3. The rechargeable electric shaver according to claim 1, wherein the heat generating portion is provided on a detachable protective cap for protecting the blade portion. 4. The rechargeable electric shaver according to claim 3, wherein the heat generating portion comprises a second secondary coil and a heat generating element. 5. The rechargeable electric shaver according to claim 4, wherein the heating element is a resistance heating wire. 6. The rechargeable electric shaver according to claim 4, wherein the heating element is a Peltier element. 7. The rechargeable electric shaver according to claim 3, wherein the protective cap is made of a magnetic material. 8. The rechargeable electric shaver according to claim 7, wherein the protective cap is formed of metal on the side of the electric device to be mounted on the electric device, and formed of a non-magnetic material on the outer side. 9. The protection cap according to claim 7, wherein the engagement mounting portion to the electric device is formed of a non-magnetic material.
Or the rechargeable electric razor according to 8. 10. The rechargeable electric shaver according to claim 3, wherein the protective cap includes a sublimable deodorant or an antibacterial agent. 11. The rechargeable electric shaver according to claim 1, wherein the electromagnetic force applied to the heat generating portion is an electromagnetic force of a primary coil for charging on a charger side. 12. The rechargeable battery according to claim 11, wherein a heat generating portion is arranged at an upper end, a secondary coil is arranged at a lower end, and a set to a charger can be selected up and down. Electric razor. 13. The rechargeable electric shaver according to claim 12, wherein the secondary coil is disposed at a bottom portion of the lower end. 14. The rechargeable electric shaver according to claim 12, wherein the secondary coil is disposed on a lower side surface.