JPH02161981A - Oscillating electric shaver - Google Patents

Abstract

PURPOSE:To minimize an oscillation in a grip part side and to give the oscillating electric shaver excellent usefulness by making a head part, to which a shaver blade is fitted, into a freely attachable and detachable state for a body in which a motor is built-in and providing an eccentric weight in the head part. CONSTITUTION:A head part 2 is composed of housings 21 and 22 formed with two front and rear partitioned parts, a fitting cylinder part 25, which is to be inserted into the inner surface of the small diameter cylinder part of a grip part 7 and connected with the side of the grip part 7 by a bayonet engagement, is projectingly provided for the bottom edge of the head part 2, and a driven side joint 30, to which an eccentric weight 3 is fitted, is provided for the internal part of the head part 2. However, in this oscillating electric shaver, when a motor 8 is rotated by the operation of a switch 14, the oscillation is generated by the eccentric rotation of this eccentric weight 3. At this time, since a shaft 31 projectingly provided for the eccentric weight 3 is eccentric to an output shaft 80 of the motor 8 and slides and contacts with the inner surface of a hole 24 of a ring guide member 23 accompanying the eccentric rotation of the eccentric weight 3, the oscillation can be surely transmitted through the guide member 23 to the housings 21 and 22 of the head part 2, and slight oscillation is given to a shaver blade 1.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a vibrating electric shaver that vibrates a head portion to which razor blades are attached.

[Conventional technology]

The best electric razor is one that has an outer blade and an inner blade that slides into contact with the inner surface of the outer blade, but there are also razor blades that are equipped with the same razor blades as safety razors. There are vibrating electric razors that vibrate the head. This type of electric razor disclosed in Japanese Patent Application Laid-Open No. 63-220898 has the feature of being able to shave even long beards reliably without resistance. As shown in FIG. 9, the razor is equipped with two razor blades 1, 1 at the tip of an arm 13 integrally projecting from the upper end of a main body housing 12 containing a motor 8 and a battery 9. When the motor 8 is rotated by operating the switch 14, vibration is generated by the eccentric weight 3 attached to the output shaft of the motor 8, and this vibration causes the motor 8 and the motor mounting The power is transmitted to the razor blade 1 portion via the base 15 and the main body housing 12.

[Problem to be solved by the invention]

In this case, the transmission loss is large because the vibration transmission path from the eccentric weight to the razor blade is long, and even if sufficient vibration can be applied to the razor blade, the side opposite to the razor blade from the center of gravity G Since the vibration on the grip end side at the lower end of the main body housing 12 also increases, there is a problem that the grip is not convenient to use. The present invention has been made in view of these points, and its purpose is to reliably transmit vibrations caused by the rotation of the eccentric weight to the razor blade side, but to reduce vibrations on the grip side. To provide a vibrating electric shaver that is easy to use.

[Means to solve the problem]

Accordingly, the present invention provides a vibrating electric shaver in which the head portion to which the razor blade is attached is vibrated by the rotation of an eccentric weight, in which the head portion to which the razor blade is attached is detachable from the main body that has a built-in motor. Additionally, it is characterized in that an eccentric weight is disposed within the head portion. [Function] According to the present invention, since the head portion equipped with the eccentric weight is detachable from the grip portion that has a built-in motor, vibrations generated by the eccentric rotation of the eccentric weight are easily transmitted to the head portion, and therefore the head portion has a built-in motor. Since the head part is separate from the grip part, the vibration of the head part is difficult to be transmitted to the grip part. [Example] The present invention will be described in detail based on the illustrated example below.
Figures 3 to 3 show one embodiment. This vibrating electric shaver has a grip part 7 that has a built-in motor 8 and battery 9.
, a battery cover 10 attached to the lower end of the grip part 7, a head part 2 detachably connected to the upper end of the grip part 7, and two razor blades 1, 1 attached to the upper end of the head part 2. It is formed with a mounting base 11 that is attached to the base. As is clear from FIG. 1, the upper end of the grip portion 7 is a small-diameter cylindrical portion surrounded by a ring 5, and is connected to a drive shaft 81 attached to an output shaft 80 of a motor 8,
A drive-side joint 82 attached to 1 is located within the small-diameter cylindrical portion. The drive side joint 82 is attached to the drive shaft 81 so as to be able to transmit rotation and to be able to freely slide in the axial direction within a required range, and a spring 84 causes the drive side joint 82 to move upward. 14 in the energized figure is a switch handle, and 15 is a waterproof gasket. On the other hand, as is clear from FIG. 3, the head part 2 consists of a housing 21 and 22 formed in two halves, front and rear, and is inserted into the inner surface of the small diameter cylindrical part of the grip part 7 and gripped by bayonet engagement. A fitting cylinder part 25 connected to the part 7 side is provided protruding from the lower end, and a driven side joint 30 to which an eccentric weight 3 is attached is disposed inside. This driven side joint 30 is detachably connected to the drive side joint 82 and transmits the rotation of the motor 8 to the eccentric weight 3.
It is press-fitted into place. The driven side joint 3o is prevented from falling into the fitting cylinder part 25 by a flange 36 provided on its outer peripheral surface, and is also provided protruding from the upper surface of the eccentric weight 3 on the upper side of the eccentric weight 3. There is a ring-shaped guide member 23 through which the shaft 31 is inserted into the hole 24, which prevents the shaft 31 from moving upward.
Even when the eccentric weight 3 and the driven joint 30 are removed, the eccentric weight 3 and the driven joint 30 remain in the predetermined positions in the head part 2. When the head part 2 is next connected to the grip part 7, the driving joint 82 and the driven joint 30 are removed.
are ensured to be connected. A mounting base 11 equipped with two razor blades 1, 1 is removably attached to the upper end of the head portion 2 while sandwiching the housing 21 and 22, which are divided into two, from the front and back.
The head portion 2 is positioned and fixed by engagement with a fixing spring 17 disposed at the upper end of the head portion 2. Therefore, in this vibrating electric shaver, if the motor 8 is rotated by operating the switch 14, the drive shaft 8
1, the drive side joint 82, and the driven side joint 30, the eccentric weight 3 is driven, and the eccentric rotation of the eccentric weight 3 causes vibration. At this time, since the shaft 31 protruding from the eccentric weight 3 is centered with respect to the output shaft 80 of the motor 8, as the eccentric weight 3 rotates eccentrically,
The ring-shaped guide member 23 is in sliding contact with the inner surface of the hole 24, and the vibration is transmitted to the head portion 2 through the guide member 23.
The vibration is reliably transmitted to the housing 21, 22 of the razor blade 1, and a slight vibration is applied to the razor blade 1. In order to transmit vibrations to the razor blade 1 reliably and with little loss in this way, even if the eccentricity and weight of the eccentric weight 3 are small, vibrations sufficient for shaving can be applied to the razor blade 1. Furthermore, since the motor 8 can be rotated at high speed, the vibration frequency of the razor blade 1 can be increased, and in this respect as well, a good shaving action can be obtained. In addition, since the eccentricity and weight of the eccentric weight 3 can be reduced, vibrations generated at the lower end of the grip part 7 on the opposite side of the center of gravity G can be reduced. Since the head part 2 is detachably connected and the vibration of the head part 2 is less likely to be transmitted to the grip part 7 side, the vibration of the grip part 7 can be further suppressed. As shown in FIG. 4, the guide member 23 may have no hole 24 and may simply have the upper surface of the eccentric weight 3 in sliding contact with the lower surface. Further, as shown in FIGS. 5 to 7 or 8, the shaft 31 of the eccentric weight 3 is provided coaxially with the output shaft 80 of the motor 8, and this shaft 31 is connected to the housing 22 or the housing 21 of the head section 2. In the case where the grip portion 7 containing the motor 8 and the head portion 2 containing the eccentric weight 3 are separated, which may be received by a bearing 27 formed on the guide member 23 formed integrally, the motor 3 Since the distance of the eccentric weight 3 inevitably becomes longer, the shaft runout increases, the motor load increases, and the rotational speed tends to decrease. However, when the bearing 27 is installed in this way, the vibration effect due to this decrease in the rotational speed can be reduced. This can prevent the reduction of In addition, in each of the above embodiments, the guide member 2 provided on the head portion 2
3 guides the rotation of the eccentric weight 3 and ensures that vibrations generated by the eccentric weight 3 are transmitted to the head portion 2. However, even without the guide member 23, it is possible to transmit good vibration to the razor blade 1 can give.

【Effect of the invention】

As described above, in the present invention, since the head part equipped with the eccentric weight is detachable from the grip part with a built-in motor, the vibrations generated by the eccentric rotation of the eccentric weight are easily transmitted to the head part, and therefore the head part has a built-in motor. While the razor blade provided in the head part can be sufficiently vibrated, since the head part is separate from the grip part, the vibration of the head part is difficult to be transmitted to the grip part.
Furthermore, since the eccentricity and weight of the eccentric weight required to give sufficient vibration to the razor blade can be reduced, the vibration of the grip is extremely small, and the hand holding the grip does not have to worry about the vibration. You can get something that is easy to use without any hassle.

[Brief explanation of the drawing]

FIGS. 1(a) and 1(b) are a broken side view and an enlarged broken side view of one embodiment of the present invention, and FIGS. 2(a), (b), and (c) are a side view, a front view, a bottom view of the same, and 3 is an exploded perspective view of the same as above, FIG. 4 is an enlarged broken side view of another embodiment, FIG. 5 is a front view of a head portion of still another embodiment, FIG. 6 is a sectional view of the same as above, and FIG. The figure is a view taken in the direction of arrow A in FIG. 6, FIG. 8 is a sectional view of the head portion of another embodiment, and FIGS. 9(a) and 9(b) are a front view and a sectional view of the conventional example. Razor blade, 2 is the head part, 3
is an eccentric weight, 7 is a grip part, and 8 is a motor 6 Agent Patent Attorney Ishi 1) Length 7 1...Razor blade 2...Head part 3...Eccentric weight Fig. 2 (b) Fig. 4 0 (b) Figure 5 Figure 6 Figure 8

Claims (1)

[Claims] (1) In a vibrating electric shaver in which the head part to which the razor blade is attached is vibrated by the rotation of an eccentric weight, the head part to which the razor blade is attached is removable from the main body with a built-in motor, and the head part A vibrating electric shaver characterized by having an eccentric weight installed inside.