JP2001038069A - Separate type electric razor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the electromagnetic waves generated from a motor mounted on an electric razor from adversely affecting the human body. SOLUTION: The electric razor is bisected to a razor unit 10 and a driving power unit 20. The two units 10 and 20 are connected by a flexible shaft 30. One end of a power transmission shaft 31 is connected via a power transmission mechanism 26 to an AC motor 24 within the driving power unit 20. The other end is connected to a revolving shaft of an inner blade arranged on the inner side of an outer blade 12 of the razor unit 10. As a result, the revolution output of the AC motor 24 is transmitted to the revolving shaft of the inner blade through the flexible shaft 30. Since the razor unit 10 brought into tight contact with the face is separated from the AC motor 24 which is an electromagnetic generating source, a user does not receive the influence of the electromagnetic waves generated from the motor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric razor, and more particularly to a technique for preventing electromagnetic waves generated from an electric motor from adversely affecting a human body.

[0002]

2. Description of the Related Art Recently, there has been a problem that electromagnetic waves generated from electric appliances around the human body have a bad influence on a human body. Electric motors mounted on refrigerators, electric fans, vacuum cleaners, and the like are the main sources. In particular, a considerably strong electromagnetic wave is generated from the AC motor, which has a great influence.

[0003]

Among electric appliances, electric razors, in particular, have an extremely large effect on the human body. Since the electric razor is used in direct contact with the skin of a person, the distance between the motor, which is a source of electromagnetic waves, and the skin is extremely short, and the intensity of the electromagnetic waves exposed to the person becomes correspondingly strong. Moreover, since the electric razor is used repeatedly every day, even if the exposure time per day is short, it has a long-term effect and is said to be extremely dangerous.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a safe electric razor capable of preventing electromagnetic waves generated from an electric motor from adversely affecting a human body. is there.

[0005]

Therefore, according to the present invention, there is provided a power unit for transmitting the rotational output of an electric motor to one end of a flexible shaft via a suitable power transmission mechanism, It is divided into a razor unit that is operatively connected via a mechanism and drives the inner blade by its rotational driving force, and transmits the power of the inner blade via the flexible shaft having an appropriate length.

In this electric razor, it is more preferable to carry out the following items (A) to (D). (A) The power unit incorporates the electric motor and the power transmission mechanism in a cylindrical case body, and flanges are integrally formed at both ends of the cylindrical case body,
A reel for winding and storing the flexible shaft is provided. (B) The razor unit has a circular dome-shaped rotary razor mechanism protruding from the front of a grip section held by a user with a palm and a finger, and the rotation axis of the inner blade is orthogonal to the front of the grip section. The flexible shaft is connected to the base of the grip portion in a direction orthogonal to the rotation axis, and the rotation axis of the flexible shaft is changed to the rotation axis of the inner blade inside the grip portion. Gear mechanism is built in. (C) The outside of the electric motor is covered with an electromagnetic wave shielding material. (D) If the electric motor is an AC motor, connect a commercial power cable to the power unit.

[0007]

FIG. 1 shows an example of the structure of a separate electric razor of the present invention. The electric razor has a two-part configuration including a razor unit 10 and a power unit 20. The razor unit 10 is a small plastic case 1 serving as a grip portion that can be easily held by a user with one hand.
It is summarized in 1. A circular dome-shaped rotary razor mechanism 12 protrudes from the front of the case 11. An inner blade (not shown) is arranged inside the outer blade 13 of the razor mechanism 12. The inner blade is attached to the tip of a rotating shaft (not shown) arranged in the case 11 perpendicular to the front surface of the grip, and is driven to rotate about the rotating shaft.

[0008] The power unit 20 is assembled into a plastic case 23 integrally having a rectangular flange 22 at each end of a cylindrical case body 21. An AC motor 24 is fixed inside the case body 21. The outside of the AC motor 24 is covered with an electromagnetic wave shielding material. Power cable 2 for driving AC motor 24
5 is wired to the outside through a hole in the flange 22 and is inserted into a commercial power outlet installed in a general household.

The two units 10 and 20 are connected by a flexible shaft 30 having a length of 30 cm or more in order to transmit the rotational driving force of the AC motor 24 of the power unit 20 to the rotary shaft of the razor unit 10. The flexible shaft 30 includes a power transmission shaft 31, a bearing tube 32 wrapping around the outside of the shaft 31, and a protection tube 33 covering the outside of the tube 32, as shown in a detailed view A in the figure. Become. Bearing tube 32
The power unit 20 is fixed to the outer periphery of the case body 21, and the razor unit 10 is fixed to the base of the case 11.

In the power unit 20, an AC motor 24
Are coupled to a gearbox 26.
The gear box 26 has a mechanism in which two bevel gears 40 are engaged with each other, as shown in an enlarged view B in the figure. The output shaft of the AC motor 24 is connected to the shaft of one bevel gear 40 and the other bevel gear The flexible shaft 30 is attached to the shaft of the gear 40.
Of the power transmission shaft 31 are connected. AC motor 2
The rotation driving force from 4 is turned by two bevel gears 40 and transmitted to the power transmission shaft 31 of the flexible shaft 30.

The razor unit 10 also has a direction changing mechanism using the same bevel gear 40 as described above, and one bevel gear 40 has an inner blade coupled thereto. The power transmission shaft 31 is connected to the other bevel gear 40. When the AC motor 24 is driven to rotate, the inner blade rotates. Therefore, the power unit 20
Can be used by placing only the razor unit 10 on the face while placing on the washstand. The user is hardly affected by the electromagnetic waves generated from the AC motor 24.

After the electric razor is used, the flexible shaft 30 is wound around the outer periphery of the case body 21 of the power unit 20 and housed between the flanges 22 as shown in FIG. At this time, if the distance between the flanges 22 is set to be larger than the diameter of the razor mechanism 12 of the razor unit 11 and smaller than the width of the grip, FIG.
As shown in FIG. 7, the razor mechanism 12 can be housed between the flanges 22, and the whole can be compactly assembled.

=== Other Embodiments === (1) The electric motor mounted on the power unit 20 may be a DC motor or another drive type motor in addition to the AC motor.

(2) As a driving method of the inner blade, other methods such as a reciprocating driving method may be adopted in addition to the rotary driving method.

(3) The bevel gear 40 mechanism is not always necessary, and the flexible shaft 30 may be directly connected to the output shaft of the motor or the rotating shaft of the inner blade.

(4) The power transmission mechanism between the flexible shaft 30 and the output shaft of the motor or the rotating shaft of the inner blade may include a speed reduction mechanism or a speed increase mechanism.

(5) A power switch for turning on / off the electric motor and an operation for changing the rotation output of the electric motor on the outer surface of the razor unit so that the user can easily operate the razor with one hand. A control switch or the like may be provided. By connecting each switch to the control circuit of the electric motor with a signal cable arranged in parallel with the flexible cable, the user can operate the power supply of the motor and the rotation speed of the motor while using the razor.

[0018]

According to the present invention, the electric motor, which is a source of electromagnetic waves, and the razor portion which is in direct contact with the human body are separated at a predetermined interval. Can be prevented from being exposed to the human body in close proximity. Therefore, it is possible to minimize the adverse effect of the electromagnetic waves generated from the electric motor on the human body.

In particular, if a reel is provided on the outer periphery of the power unit, the flexible shaft can be stored smoothly. In addition, when the rotation direction of the flexible shaft does not match the rotation direction of the electric motor or the rotation direction of the inner blade, the problem can be solved by providing an appropriate gear mechanism for changing the direction. In addition, by covering the outside of the electric motor with an appropriate electromagnetic wave shielding material, the influence of the electromagnetic wave can be further reduced. In the case of an AC motor, if a power supply unit is provided with a commercial power cable, it can be used by directly connecting to an outlet.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a separate electric razor of the present invention.

FIG. 2 is a perspective view showing an example of a storage state of the separate electric razor of FIG. 1 when not in use.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Razor unit 11 Case 12 Razor mechanism 13 Outer blade 20 Power unit 21 Case trunk 22 Flange 24 AC motor 25 Power cable 30 Flexible shaft

Claims (5)

[Claims] 1. A power unit for transmitting the rotational output of an electric motor to one end of a flexible shaft via a suitable power transmission mechanism, and a power unit which is operatively connected to the other end of the flexible shaft via a suitable power transmission mechanism. A separate type electric razor, which is divided into a razor unit that drives an inner blade by a rotational driving force, and transmits power of the inner blade via the flexible shaft having an appropriate length. 2. The power unit according to claim 1, wherein the electric motor and the power transmission mechanism are built in a cylindrical case body, and flanges are integrally formed at both ends of the cylindrical case body. A separate type electric razor, comprising a reel for winding and storing the flexible shaft. 3. The razor unit according to claim 1, wherein the razor unit has a circular dome-shaped rotary razor mechanism protruding in front of a grip portion held by a user with a palm and a finger, and a rotating shaft of an inner blade thereof. Is perpendicular to the front of the grip,
The flexible shaft is connected to the base of the grip portion in a direction orthogonal to the rotation axis, and a gear mechanism that changes the rotation axis of the flexible shaft to the rotation axis of the inner blade is provided inside the grip portion. A separate electric razor characterized by being built-in. 4. A separate electric razor according to claim 1, wherein an outside of said electric motor is covered with an electromagnetic wave shielding material. 5. A separate electric razor according to claim 1, wherein said electric motor is an AC motor, and a commercial power cable is connected to said power unit.