JPH04354966A - Reciprocating type electric razor - Google Patents

Abstract

PURPOSE:To provide an electric razor which does not generate tortional stress even if a pair of vibrators are reciprocatingly driven in the left and right directions opposite to each other with a pair of the vibrators connected to each other to minimize a storage space. CONSTITUTION:Eccentric pins 11, 12 are formed in the respective eccentric positions from a shaft of a motor and a pair of parallel vibrators 9, 10 are fitted o the eccentric pins 11, 12. The vibrators 9, 10 are each provided on both sides with elastic legs 13 ended with locating pieces 14. The respective locating pieces 14 are provided with projections 15 and holes 16 in which the projection is loosely rotatably fitted.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive device for converting the rotational motion of a motor into reciprocating motion in a reciprocating electric shaver.

0002

2. Description of the Related Art Conventionally, reciprocating electric shavers have had a problem with noise generated during the reciprocating motion of a vibrator. In view of this problem, for example, as shown in Japanese Unexamined Patent Publication No. 56-20484, there is a device in which a pair of inner cutter bases are provided and reciprocated in opposite directions. In this case, the impact required for reciprocating drive is canceled out, and there is an effect that vibration related to the shaft can be reduced and smooth vibration can be achieved. However, in this drive device, each drive element for transmitting vibration to a pair of inner cutter bases is formed from a single member. That is, this driver consists of a pair of parallel bases on which each inner cutter base is placed, and elastic legs extending from both ends of each base. In addition, the ends of the elastic legs are connected to each other, making the shape complicated and difficult to mold with a mold. Furthermore, since the pair of bases of the driver move in opposite directions, torsional stress acts on the ends of the elastic legs, resulting in irregular reciprocating motion.

0003

The present invention has been devised to solve the above-mentioned drawbacks, and provides a reciprocating blade having a simple structure and equipped with a pair of inner cutter bases that regularly reciprocate in opposite directions. This is a type of electric shaver.

0004

[Means for Solving the Problems] The present invention provides a motor, an eccentric cam that is fitted onto the shaft of the motor and has eccentric pins located eccentrically in opposite directions from the center of the motor shaft, and A reciprocating electric shaver is composed of a pair of parallel vibrators that fit together, and the pair of vibrators are reciprocated in left and right directions opposite to each other by the rotation of a motor. It has an elastic leg that allows driving, and a positioning piece that is positioned on the razor body at the end of the elastic leg, and the positioning piece of one vibrator is formed with a protrusion, and the positioning piece of the other vibrator is formed with a protrusion. A hole is formed into which the protrusion is rotatably fitted.

[0005]

[Operation] According to the present invention, the pair of vibrators are made of different members and are connected by the protrusion and hole of the positioning piece of each vibrator, so that the vibrator can be made into a simple shape. , easy to mold. Also, a pair of vibrators can be placed adjacent to each other with respect to the razor body,
The razor body can be made compact. Moreover, since the positioning pieces of each vibrator are rotatably connected, torsional stress is not generated in the positioning piece even if the vibrators are reciprocated in opposite directions. Therefore, each vibrator can smoothly reciprocate in opposite directions,
Make regular movements.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below in detail with reference to the drawings.

Reference numeral 1 denotes a main body case of an electric shaver according to the present invention, in which a main switch 2 is slidably provided on the front surface, and a sliver blade 3 that can be protruded and retracted along the main body case 1 is provided on the back surface. A sharpening blade switch 4 for protruding and retracting the sharpening blade 3 is provided. On the other hand, a frame member 5 is provided at the upper part of the main body case 1 and is detachable from the main body case. Further, inside the main body case 1, a Ni-Cd battery 6, a motor 7, and charging parts (not shown) for the Ni-Cd battery 6 are provided.

An eccentric cam 8 is fitted onto the rotating shaft of the motor 7, and a pair of vibrators 9 and 10 are attached to the eccentric cam 8. The pair of vibrators 9 and 10 reciprocate in opposite directions when the motor 7 rotates. That is, the eccentric cam 8 has eccentric pins 11 and 12 protruding from symmetrical positions with respect to the rotation axis of the motor 7, respectively. Vibrators 9 and 10 are connected to these eccentric pins 11 and 12, respectively. For this reason, the oscillators 9 and 10
reciprocate in opposite directions (see Figure 3). In addition, elastic legs 1 are provided on both sides of the vibrators 9 and 10 to allow reciprocating drive.
3, and a cylindrical positioning piece 14 for positioning the main body case is formed at the end of the elastic leg 13. Further, a protrusion 15 is formed on the positioning piece 14 of one vibrator 9, and a protrusion 15 is formed on the positioning piece 14 of the other vibrator 10.
A hole 16 is formed into which 5 is rotatably and loosely fitted. Here, since the pair of vibrators 9 and 10 are connected parallel to the main body case and positioned, torsional stress is generated in the positioning piece 14 due to reciprocating drive in opposite directions, but the positioning piece 14 is rotatable. Since they are loosely fitted, each reciprocating drive does not independently affect each other's operations. Note that each of the pair of vibrators 9 and 10 has an inner cutter 1.
7 are connected.

[0009] Reference numeral 18 designates a pair of outer cutter holders, which are arranged parallel to each other. An arch-shaped outer cutter 19 is stretched over the outer cutter holder 18 . A boss hole 20 is formed in the side surface of this outer cutter holder 18. Further, reference numeral 21 denotes a link member, which is formed of an upper piece, a lower piece, and both side pieces consisting of thin pieces 22. The upper and lower pieces of the link member 21 are provided with bosses 2 that fit into the boss holes 20 of the outer cutter holder 18.
3 are erected. At this time, the boss hole 20 has a slightly elongated rectangular hole shape, which restricts the movement of the outer cutter holder in the left and right direction, and allows each outer cutter holder to move in the vertical direction, allowing pressure contact with the inner cutter. The state can be adjusted. A boss hole 24 is formed in the center of each of the upper and lower pieces, and is rotatably fitted into a boss 25 erected on the frame member 5. In this way, the pair of outer blade holders 18 are attached to the frame member 5 via the link member 21, and since the link member 21 is rotatably attached to the frame member 5, the pair of outer blade holders 18 are attached to the frame member 5 via the link member 21. move up and down relative to each other. That is, when one outer cutter holder is pressed against the skin and moves downward, the other outer cutter holder is pushed upward by the rotation of the link member 21.

By the way, since both sides of the link member 21 are formed of thin pieces, when the outer cutter is pressed against the skin, one outer cutter holder moves upward and the other outer cutter holder moves downward. In this case (FIGS. 4b and 4c), the link member 21 rotates around the boss 25 formed on the frame member 5, and
Deforms while maintaining a substantially parallelogram shape. At this time, the link member attempts to return to its original substantially rectangular shape due to the elasticity of the thin piece. As a result, the pair of outer cutter holders try to maintain mutually neutral postures (FIG. 4a). Therefore, even if the pressure contact force with the skin is not sufficient, a pushing force is constantly generated on one of the outer cutter holders, improving the adhesion with the skin.

[0011]

[Effects of the Invention] According to the present invention, since the pair of vibrators are connected to each other by the protrusion and hole of the positioning piece, it is possible to arrange the pair of vibrators adjacent to each other with respect to the razor body. This allows the razor body to be made more compact. Further, since the positioning pieces of the pair of vibrators are rotatably connected, torsional stress is not generated in the positioning pieces even if the vibrators are reciprocated in opposite directions.

[Brief explanation of drawings]

FIG. 1: a is a front view of an electric shaver, b is a rear view, and c is a bottom view.

FIG. 2 is an inner side view of the electric shaver.

FIG. 3 is a conceptual diagram of the operation of the vibrator.

FIG. 4 is an internal view of a main part showing vertical movement of the outer cutter holder.

FIG. 5 is an exploded perspective view of essential parts of the electric shaver.

FIG. 6 is an exploded perspective view of essential parts of the electric shaver.

[Explanation of symbols]

1 Main body case 5 Frame members 9,10 Vibrator 17 Inner blade 18 Outer blade holder 19 Outer blade 21 Link member 22 Thin piece

Claims (1)

[Claims] Claim 1: a motor; a motor fitted to the shaft of the motor;
It consists of an eccentric cam with eccentric pins located eccentrically in opposite directions from the center of the motor shaft, and a pair of mutually parallel vibrators that fit into each eccentric pin. In the reciprocating electric shaver in which the oscillators are reciprocated in left and right directions opposite to each other, each of the pair of vibrators has elastic legs that allow reciprocating movement on both sides, and a positioning piece that is positioned on the razor body at the end of the elastic leg. 1. A reciprocating electric shaver, characterized in that a positioning piece of one vibrator is formed with a protrusion, and a positioning piece of the other vibrator is formed with a hole into which the protrusion is rotatably fitted.