JP2534856B2 - Reciprocating electric razor - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a reciprocating electric shaver having a noise-preventing pair.

[Conventional technology]

Conventionally, as a reciprocating electric shaver, for example, as shown in Japanese Utility Model Laid-Open No. 58-86070, a rotary motion of a drive motor is composed of an eccentric cam on a motor shaft and a vibrator engaged with the cam. The inner blade reciprocates linearly by changing to linear motion through the power transmission means, but the eccentric cam and the oscillator, which are power transmission means, generate high noise.

Therefore, the eccentric cam and the vibrator are housed in the main body case so that they are entirely surrounded by the main body case, like the motor.

However, only by surrounding the eccentric cam and the vibrator with the main body case as described above, the sound generated from them cannot be sufficiently shielded, and the noise has not been sufficiently reduced.

[Problems to be solved by the invention]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the problem of noise generation that the conventional products have and to provide a reciprocating electric shaver having excellent soundproofing.

[Means for solving problems]

According to the present invention, a motor 5 for driving a reciprocating inner blade 2 and a power transmission means for converting the rotational movement of the motor 5 into a linear movement and transmitting the linear movement to the inner blade 2 are provided inside the main body case 1. The power transmission means includes an eccentric cam 9 fixed on the shaft of the motor 5, a vibrator 10 connected to the eccentric cam 9, and the vibrator.
It is premised on a reciprocating electric shaver including a drive shaft 16 projecting upward from 10 and supporting the inner blade 2. In addition, according to the present invention, the eccentric cam 9 and the vibrator 10, and the connecting portion of the eccentric cam 9 and the vibrator 10 are housed in a soundproof case 7 that is hermetically sealed, and the reciprocating vibration fulcrum of the vibrator 10 is a soundproof case. It is supported and fixed inside 7. The sound insulation case 7 is fixed to the inner wall of the main body case 1, and the motor 5 is fixed to the sound insulation case 7 side to suspend and support the main body case 1 via the sound insulation case 7.

In such a case, the noise most often generated from the power transmission means, that is, the sound generated from the connecting portion between the eccentric cam 9 and the vibrator 10 and the wind noise of the vibrator 10 vibrating at a high speed, etc., is sealed by the sealed soundproof case 7. Can be confined and shielded. In addition, the sound insulation case 7 in which the noise source is confined in this way
Is fixed to the inner wall of the main body case 1, so that the double wall of the sound insulating case 7 and the wall of the main body case 1 can further enhance the sound insulating effect. Further, since the motor 5 which is another noise and vibration source is fixed to the sound insulation case 7, the vibration of the motor 5 is not directly transmitted to the main body case 1.

〔Example〕

An embodiment of an electric shaver according to the present invention will be described with reference to the drawings.

1 to 3, a main body case 1 of this electric razor is formed by arranging plastic front and rear cases 1a and 1b in a rectangular cylindrical shape.
The reciprocating inner blade 2 is provided on the upper part of the above, and the mesh-shaped outer blade 3 covering the upper part of the inner blade 2 is provided by detachably covering the upper part of the main body case 1 with the outer blade holder 4.

A motor 5, a battery 6 and the like are housed inside the body case 1, and a sound insulation case 7 is incorporated above the motor 5.

The sound insulation case 7 is formed in a rectangular box shape with an open bottom by associating the front and rear cases 7a and 7b with each other, and the open bottom is closed by a bottom plate 7c to form a closed box independent of the main body case 1. The front and rear cases 7a and 7b of the sound insulation case 7 are die-cast molded articles made of zinc, aluminum, or the like having a mass larger than that of plastic, which is a molding material of the main body case 1, so that the vibrations themselves are small.

An eccentric cam 9 and a vibrator 10, which are power transmission means for converting the rotational motion of the motor 5 into a linear motion and transmitting the linear motion to the inner blade 2, are housed inside the sound insulation case 7.

The sound insulating case 7 supports the motor 5 by fixing it with screws 11 on the lower surface side of the bottom plate 7c, and the shaft 12 protruding from the upper end of the motor 5
Is projected into the case 7 from the opening 13 of the bottom plate 7c, and the eccentric cam 9 is fixed on the shaft 12.

In addition, the inside of the sound insulation case 7 is a plastic vibrator.
The vibrator 10 has a vibrator body 17 in which a drive shaft 16 is integrally projected upward, and thin-walled legs 18 and 18 integrally formed at the left and right ends of the vibrator 10. Becomes the drive axis
16 is projected upward from the opening 19 in the center of the upper wall of the sound insulation case 7, and the upper and lower ends of the left and right legs 18, 18 which are the reciprocating vibration fulcrums of the vibrator 10 are provided on the inner surface of the upper wall of the sound insulation case Engage and fix in the engaging recesses 20. Oscillator 10 and eccentric cam 9
Is the pin 21 and the eccentric cam 9 protruding from the lower surface of the vibrator 10.
A plastic connecting rod (23) is rotatably connected to an eccentric pin (22) protruding from the rotatably connected ends.

At this time, when the motor 5 rotates, this rotation is transmitted to the vibrator 10 via the eccentric cam 9 and the connecting rod 23, and the vibrator 10 reciprocates in the left-right direction through elastic deformation of the thin legs 18, 18. Vibrate.

The inner blade 2 is provided by connecting an inner blade holder 24 to the projecting upper end of the drive shaft 16 of the vibrator 10, and slides in contact with the inner surface of the outer blade 3 along with the reciprocating vibration of the vibrator 10 to reciprocate left and right. Move linearly.

At this time, as means for transmitting the rotation of the eccentric cam 9 to the vibrator 10, since both ends of the connecting rod 23 are pivotally connected to the pin 22 on the eccentric cam 9 side and the pin 21 on the vibrator 10 side respectively, There is a gap between the eccentric pin and the groove, such as that seen in the above-mentioned Japanese Utility Model Laid-Open No. 58-86070, in which the eccentric pin on the eccentric cam is slidably engaged directly with the groove on the lower surface side of the vibrator. Since no rattling occurs, a quiet and smooth power transmission effect with less vibration is obtained, which is advantageous in preventing sound generation.

The play formed between the opening 19 of the sound insulation case 7 and the drive shaft 16 is a rubber bristling plate that allows the drive shaft 16 to move.
By closing the inside of the sound insulation case 7 by closing it with 14, the effect of shielding the sound generated from the eccentric cam 9 and the vibrator 10 can be further enhanced.

3 and 4, a large number of honeycomb-shaped recesses 8 are provided on the inner surfaces of the front and rear cases 7a and 7b of the sound-insulating case 7 so that the vibration sounds of the eccentric cam 9 and the vibrator 10 resonate. It can be reduced by 8 to improve the noise prevention effect.

In FIG. 4, the sound insulation case 7 is formed by inserting the connecting pins 25 protruding from the inner surfaces of the front and rear cases 1a and 1b of the main body case 1 into the holes 26 provided in the front and rear cases 7a and 7b of the sound insulation case 7. The case 1 is integrally connected and fixed, but at this time, vibration isolation O is applied between the two cases 7 and 1 on the connecting pin 25.
An anti-vibration material 27 such as a ring is interposed. According to this, the vibration of the sound insulation case 7 can be prevented as much as possible from being transmitted to the main body case 1, and the vibration of the main body case 1 can be reduced, which is also advantageous in noise prevention.

[Another embodiment]

In the case where the sound insulation case 7 is configured by abutting the front and rear cases 7a and 7b, which are divided into two in the front and rear, as in the above-described embodiment, the vibrator 10 can be easily assembled in the inside, but is not necessarily limited to this. Absent. For example, front and rear cases 7a and 7b
May be formed in a box shape integrally formed from the beginning.

Further, it is more advantageous in terms of noise prevention that the main body case 1 is formed not only to surround and surround the four sides of the sound insulation case 7 but also to cover the upper surface side of the sound insulation case 7.

Needless to say, the power transmission means is not limited to the one configured of the eccentric cam 9, the connecting rod 23 and the vibrator 10, and may be another mechanism.

Further, the sound insulation case 7 may be a die-cast molded product made of aluminum or the like, and may be pressed by brass, for example.

〔The invention's effect〕

According to the present invention, the power transmission means between the reciprocating inner blade 2 and the motor 5 is stored in the hermetically sealed sound insulating case 7, and then the outer periphery of the sound insulating case 7 is fixed to the inner wall of the main body case 1. Therefore, there is an advantage that the effect of shielding the sound generated from the power transmission means is enhanced and the noise generation can be significantly reduced. In particular, the eccentric cam 9 and the vibrator 10, which are power transmission means, and the eccentric cam 9 and the vibrator.
The connecting portion of 10 is confined in a soundproof case 7, and the reciprocating vibration fulcrum of the vibrator 10 is supported and fixed inside the soundproof case 7, and then the soundproof case 7 is fixed to the inner wall of the main body case 1. Therefore, the sound generated from the connecting portion of the eccentric cam 9 and the vibrator 10 and the noise such as the wind noise of the vibrator 10 can be effectively insulated by the double wall of the sound insulation case 7 and the main body case 1. Excellent performance.

Moreover, the sound insulation case 7 is a sound insulation structure that supports and fixes the reciprocating vibration fulcrum of the vibrator 10 and the motor 5, and has rigidity. Since this is fixed to the inner wall of the main body case 1, the sound insulation case 7 vibrates. Therefore, the reciprocating vibration of the vibrator 10 can be fully transmitted to the inner blade 2 without loss, and the reciprocating stroke of the inner blade 2 is not reduced.

Further, since the motor 5 is fixed to the sound insulation case 7, it is possible to suppress the vibration of the motor 5 from being directly transmitted to the main body case 1. Therefore, it is possible to obtain a reciprocating electric shaver that is quiet and has little vibration.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of an electric shaver according to the present invention, and FIG.
FIG. 3 is a vertical sectional side view of a main part, FIG. 3 is an exploded perspective view of the main part, and FIG. 4 is a cross-sectional view showing a connecting portion between a main body case and a sound insulation case. 1 ... Main body case, 2 ... Inner blade, 5 ... Motor, 7 ... Sound insulation case, 9 ... Eccentric cam (power transmission means), 10 ... Vibrator (power transmission means), 23 ... Connecting rod (Power transmission means).

Claims (1)

(57) [Claims] 1. A reciprocating inner blade 2 inside a main body case 1.
The eccentric cam 9 fixed to the shaft of the motor 5 is provided with a motor 5 for driving the motor 5 and a power transmission means for converting the rotational motion of the motor 5 into a linear motion and transmitting the linear motion to the inner blade 2. And a vibrator 10 connected to the eccentric cam 9, and the vibrator 10.
A reciprocating electric shaver comprising a drive shaft 16 projecting upward from 10 and supporting the inner blade 2, said eccentric cam 9 and vibrator 10, and eccentric cam 9 and vibrator.
The connecting portion of 10 is housed in a closed sound-insulating case 7, and the reciprocating vibration fulcrum of the vibrator 10 is supported and fixed inside the sound-insulating case 7. The sound-insulating case 7 is attached to the inner wall of the main body case 1. It is fixed, and the motor 5 is fixed to the sound insulation case 7 side, and the main body case 1 is fixed.
On the other hand, a reciprocating electric razor characterized in that it is suspended and supported through the sound insulation case 7.