JPH10156067A - Reciprocation type electric razor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate extra increase in the load current by achieving a smooth operation of a vibrator while facilitating the mounting of the vibrator on a body case without requiring strict dimensional management in the design of a fixed shaft and a recessed part of the body case. SOLUTION: A vibrator 12 is made up of a part 31 for fixing thereof on a body case, a base part 32 on which a cutter is mounted while an eccentric shaft is linked thereto and an elastically deforming part 33 which is formed between the fixing part 31 and the base part 32 to allow reciprocation of the base part 32. The fixing part 31 has a fixed shaft 34 made insertable into a recessed part formed on the body case and the fixed shaft 34 has a tapered part 35 which is tapered in the direction of insertion of the shaft into the recessed part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reciprocating electric shaver.

[0002]

2. Description of the Related Art A reciprocating electric shaver converts a rotary motion of a motor into a reciprocating motion and transmits the output to a cutter to cut a beard. That is, the eccentric shaft is connected to the rotating shaft of the motor, and the vibrator connected to the eccentric shaft converts the rotating motion of the motor into a reciprocating motion. A cutter is mounted on the vibrator, and the cutter reciprocating by the vibrator cuts the beard introduced from the mesh blade.

[0003] The vibrator has a fixed portion to the main body case, a base portion for connecting the eccentric shaft and mounting a cutter,
An elastically deformable portion formed between the fixed portion and the base portion to enable the base portion to reciprocate. The fixed portion of the vibrator has a fixed shaft that can be inserted into a recess formed in the main body case, and the vibrator is fixed to the main body case by press-fitting the fixed shaft into the concave portion of the main body case. .

[0004]

When the vibrator is mounted on the main body case, the fixed shaft is press-fitted into the recess of the main body case as described above. In this case, the design of the fixed shaft and the recess of the main body case is performed. Strict dimensional control is required. That is, if the size of the fixed shaft is smaller than that of the recess, a play space is created between the fixed shaft and the recess in the recess. Because of this, the fixed shaft could not be fixed sufficiently and unpleasant vibration noise was generated during the vibration of the vibrator, and the vibration of the razor body also increased, and the movement of the cutter became unstable and shaving was successful. There are drawbacks that can not be done. On the other hand, if the size of the fixed shaft is large relative to the recess, it becomes difficult to insert the fixed shaft, making assembly difficult, and completely fixing the fixed part of the vibrator.
The operation of the elastically deforming portion of the vibrator formed continuously with the fixed portion is also restricted, and as a result, there is a disadvantage that the load current is increased.

Accordingly, the present invention does not require strict dimensional control in the design of the fixed shaft and the recess of the main body case, facilitates the mounting of the vibrator on the main body case, and facilitates the operation of the vibrator. To provide a reciprocating electric shaver which does not cause an increase in load current.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a drive motor, an eccentric shaft connected to a rotating shaft of the motor, and a motor connected to the eccentric shaft. In a reciprocating electric shaver that houses a vibrator that converts rotary motion into reciprocating motion and attaches a cutter to the vibrator to cut a beard, the vibrator includes a fixing portion to a main body case, and the eccentric shaft. And a resilient deformation portion formed between the fixed portion and the base portion to enable reciprocation of the base portion, wherein the fixed portion is formed on the main body case. It has a fixed shaft that can be inserted into the recess, and the fixed shaft has a tapered portion that becomes thinner in the direction of insertion into the recess.

[0007]

According to the present invention, since the fixed shaft formed in the fixed portion of the vibrator has a tapered portion which becomes thinner in a direction of being inserted into the concave portion provided in the main body case, the fixed shaft is formed in the concave portion. At the time of insertion, the insertion can be easily started, and the tapered portion gradually eliminates the gap with the recess with the insertion,
Eventually, it will be in a press-fit state, and the insertion will be completed by pushing the fixed shaft. The inserted fixed shaft is hard to come off when pushed into the recess.

[0008]

An embodiment of the present invention will be described with reference to the drawings.
Reference numeral 1 denotes a main body case of a reciprocating electric shaver, which is constituted by divided cases 1A and 1B. Body case 1
A razor head 2 is detachably mounted on the upper end of the razor head.
The razor head 2 has four cutters, the central two being arcuate, and the cutters on both sides being rectangular.

The razor head 2 includes an outer blade case 21,
It comprises a blade frame 22, an inner blade 23, and a blade holder 24. The outer blade case 21 has two arched outer blades and rectangular outer and inner blades on both sides. The outer blade case 21 is detachably mounted on the blade frame 22 and can be removed by operating a detachable button 25. The inner blade 23 is mounted on the tip of a drive shaft 26 protruding from the blade holder 24, and when the blade holder 24 is mounted inside the blade frame 22, the inner blade 23
Are arranged along the inner surface of the central arch-shaped outer blade.

Inside the main body case 1, a nickel-cadmium battery as a driving power source, a charging circuit, a driving motor 11,
Further, two vibrators 12, 13 and the like are provided. Rubber 14 for vibration suppression is put on the upper and lower sides of the drive motor 11 and fixed to the main body case. An eccentric shaft 15 is mounted on a rotation shaft of the drive motor 11. The eccentric shaft 15 is provided at a position where a two-story shaft is eccentric from the center. Each shaft of the eccentric shaft 15 is connected to vibrators 12 and 13 via a cam 16.

Since the vibrator 12 is connected to the shaft of the eccentric shaft 15 as it is, the connecting portion of the vibrator 12 to the shaft has an elongated hole shape. On the other hand, the vibrator 13 is
6, and the connecting portion has a round hole shape. Thus, each of the vibrators 12 and 13 is converted into a reciprocating motion by the rotational motion of the rotation shaft of the motor 11.

Since the two vibrators 12 and 13 are connected to the respective eccentric shafts of the eccentric shaft 15, they reciprocate in opposite directions. Thus, the two vibrators can cancel each other's vibrations. Two vibrators 1
The distal ends of the blades 2 and 13 are connected to the arc-shaped inner blade 23 and the rectangular inner blade provided in the outer blade case 21 via the drive shaft 26 of the blade holder 24. Each of the two vibrators has two left and right sides of the four blades, that is,
The central arched blade and the outer rectangular blade are driven one by one. The two vibrators 12, 13 are connected by a connecting rod so as to be arranged in parallel with each other.

The vibrators 12 and 13 include a fixing portion 31 to the main body case 1, a base 32, and an elastic deformation portion 33 formed between the fixing portion 31 and the base 32 to enable the base 32 to reciprocate. It is composed of The elastically deforming portion 33 creates elasticity by deforming the thin resin into a U-shape. The fixing part 31 has a fixing shaft 34 that can be inserted into a recess 40 formed in the main body case 1. The fixed shaft 34 has a tapered portion 35 which becomes thinner in the direction of insertion into the recess 40.

In order to fix the vibrators 12 and 13 to the main body case 1, the fixed shaft 34 is inserted into the recess 40. At this time, the insertion can be easily started due to the presence of the tapered portion 35, and the tapered portion 35 gradually eliminates the gap with the recess 40 with the insertion, and is finally press-fitted. Then, the insertion is completed by pushing the fixed shaft 34. The inserted fixed shaft 34 is
It is difficult to pull out when pushed into.

The tapered portion 35 formed on the fixed shaft 34 may have various shapes. For example, a fixed shaft provided with tapered portions on both side surfaces as shown in FIG.
As shown in FIG. 6, a tapered portion may be provided on one of the side surfaces, or the fixed shaft may have a conical shape as shown in FIG. Furthermore, the shape shown in FIGS. 7 and 8 can be adopted.

[0016]

According to the present invention, since the fixed shaft formed on the fixed portion of the vibrator has the tapered portion which becomes thinner in the direction of being inserted into the concave portion provided in the main body case, the concave portion is formed. At the time of insertion, the insertion can be easily started, and with the insertion, the tapered portion gradually eliminates the gap with the recess, and eventually becomes a press-fit state, and pushes in the fixed shaft. This completes the insertion. The inserted fixed shaft is hard to come off when pushed into the recess.

As a result, strict dimensional control is not required for designing the fixed shaft and the recess of the main body case, and the mounting of the vibrator on the main body case can be facilitated, so that the assemblability of the electric shaver is improved. Can be done. Further, since the gap between the fixed portion and the recess can be secured by the tapered portion, the fixed portion of the vibrator is not completely fixed, and the vibrator formed continuously with the fixed portion is not formed. The operation of the elastically deformable portion can be made smooth. as a result,
Without increasing the load current, the built-in battery can be prevented from being wasted and the battery can be used longer.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a reciprocating electric shaver.

FIG. 2 is an exploded perspective view of a motor and a vibrator.

FIG. 3 is a divided perspective view of a main body case.

FIG. 4 is a perspective view showing one embodiment of a vibrator.

FIG. 5 is a perspective view showing another embodiment of the vibrator.

FIG. 6 is a perspective view showing another embodiment of the vibrator.

FIG. 7 is a perspective view showing another embodiment of the vibrator.

FIG. 8 is a perspective view showing another embodiment of the vibrator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body case 2 Razor head 12, 13 Transducer 31 Fixed part 32 Base 33 Elastic deformation part 34 Fixed shaft 35 Tapered part 40 Concave part

Claims (1)

[Claims] 1. A main body case, in which a driving motor, an eccentric shaft connected to a rotating shaft of the motor, and a vibrator connected to the eccentric shaft for converting a rotating motion of the motor into a reciprocating motion are housed in a main body case, In a reciprocating electric shaver that cuts a beard by attaching a cutter to the vibrator, the vibrator includes a fixing portion to a main body case, a base connecting the eccentric shaft and mounting the cutter, and a fixing portion and a base. And a resiliently deforming portion that allows the base to reciprocate. The fixed portion has a fixed shaft that can be inserted into a recess formed in the main body case. A reciprocating electric shaver having a tapered portion which becomes thinner in a direction of being inserted into the recess.