JPS5944069B2 - electric razor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention fixedly connects one of the three shaft supports 4 of the sun gear 1, internal gear 2, and planet gear 3 of a planetary gear mechanism to the rotating shaft 6 of the motor 5. At the same time, one of the remaining two drives the main blade 7 and the other drives the movable blade 8 of the trimmer, and a first stopper 9 is provided on the outer periphery of the element that drives the main blade 7 and the movable blade 8, respectively. A second stopper 10 is provided, and a changeover switch 12 is provided in a housing 11 surrounding the outer side of the planetary gear mechanism.
A first protrusion 13 and a second protrusion 14 are provided on the inner circumferential wall surface of the housing 11 and are capable of simultaneously recessing and selectively protruding.
first and second protrusions 13 and 14 that can alternately protrude from the inner circumferential wall surface of the
The first and second stoppers 9 and 10 selectively abut on the movable contact 43 provided on the changeover switch 12.
The purpose of this electric shaver is to separate and transmit the rotation of the motor to the main blade and the movable blade in a small space. There are electric shavers available to you.

Conventionally, when the main blade 16 of an electric shaver and the movable blade 17 of a trimmer are selectively driven separately by the rotating shaft 19 of a single motor 18, a method is disclosed, for example, in Japanese Patent Publication No. 44-7195. An eccentric cam 20 is provided on the rotating shaft 19 so that the movable blade 17 of the trimmer is reciprocated by the eccentric cam 20, and as shown in FIG. Movable movable clutch part 2
2 is provided so that when the trimmer is not in use, both the fixed and movable clutch parts 21 and 22 are engaged and the main blade 16 rotates while slidingly contacting the outer blade 23, and the trimmer is made to protrude from the housing 24. As shown in FIG. 6, the protrusion 25 interlocking with the trimmer raises the movable clutch portion 22 to stop the rotation of the main blade 16.

However, in this case, the movable clutch part must be moved up and down along the rotating shaft, which inevitably requires a long space in the axial direction of the rotating shaft, which poses a problem in terms of miniaturization, and also requires the trimmer to be moved. However, it is not suitable for a mechanism that does not require the movement of the trimmer, the operation is complicated, and it has the disadvantage that the rotation (vibration) of the main blade can only be obtained at a frequency that matches the frequency of the trimmer.

The present invention aims to eliminate such conventional drawbacks, and will be described in detail below with reference to the accompanying drawings.

The planetary gear machine Sakaki is formed by a sun gear 1, an internal gear 2, a planet gear 3, and a shaft support 4 of the planet gear 3.
The rotating shaft 6 of the motor 5 is fixed to any one of the three elements, the sun gear 1, the internal gear 2, and the shaft support 4, for example, the sun gear 1, and one of the remaining two, for example, the shaft support. The main blade 7 is driven by the body 4, and the movable blade 8 of the trimmer is driven back and forth by the other internal gear 2.

Here, if the main blade 7 is to be driven and the main blade 7 is to be rotated, the main blade 7 may be fixedly connected directly to the shaft support 4 as shown in FIG. Alternatively, for example, an eccentric cam or an eccentric pin may be provided on the shaft support 4, and the elongated hole of the main blade 7 may be connected to this.

In addition, when reciprocating the movable blade 8, as shown in FIG. Thus, the eccentric cam 15 can be loosely fitted into the loosely fitting portion 27 of the drive rod 26 for reciprocating the movable blade 8.

In addition, a first stopper 9 and a second stopper 10 are provided at different heights on the outer peripheries of the elements that drive the main blade 7 and the movable blade 8, the triangular shaft support 4, and the internal gear 2, respectively. and
In addition, the housing 11 that houses these mechanisms has a changeover switch 1 that can be slid left and right as shown in Figure 2.
2 is attached, and the changeover switch 12 is provided with a first protrusion 13 and a second protrusion 14 that elastically slide into contact with the inner circumferential surface of the housing 11 via first and second elastic arms 45 and 46.

Here, the first protrusion 13 is provided at approximately the same height as the first stopper 9, the second protrusion 14 is provided at approximately the same height as the second stopper 10, and the inner peripheral surface of the housing 11 is First and second recesses 28 and 29 into which the first and second protrusions 13 and 14 can fit simultaneously are provided, and the first and second recesses 28 and 29 are provided.
First and twentieth recesses 30 and 31 are arranged adjacent to the outside of the recesses 28 and 29, and when the first protrusion 13 comes out of the first recess 28 and protrudes toward the center, the second The protrusion 14 is fitted into the 20th recess 31 outside the second recess 29, so that the first stopper 9 comes into contact with the first protrusion 13, and in the opposite case, the second protrusion 14 is inserted into the second recess. 29, the first protrusion 13 fits into the tenth recess 30, and the second stopper 10
comes into contact with the second protrusion 14.

Further, as shown in FIG. 3, an elastic leg 32 is provided vertically from the changeover switch 12, and a movable contact 43 is provided at the lower end of the elastic leg 32. As shown in Figure 4, a fixed contact 44 is provided,
Both the first and second protrusions 13 and 14 are located in the first and second recesses 2.
8. In the neutral position inserted into 29, the movable contact 43
When the contact is separated from the fixed contact 44 and one of the first and second protrusions 13 and 14 projects out of the first and second recesses 28 and 29, the movable and fixed contacts 43 and 44 are brought into contact continuity. .

In addition, 33 in the figure is an outer cutter with which the main cutter 7 comes into sliding contact, and is attached to the housing 11 by an outer cutter frame 34.
3 is a push-up spring that brings the main blade 7 into elastic contact with the outer blade 33, 36 is a fixed blade that together with the movable blade 8 constitutes a trimmer, 37 is a slide hole of the changeover switch 12, and 38 is a link between the movable blade 8 and the fixed blade 36. A push-up spring 39 is a pin implanted in the fixed blade 36 and supports the movable blade 8 in a reciprocating manner, 40 is a support shaft of the drive rod 26, and 41 and 42 are movable pins. , are lead wires connected to fixed contacts 43 and 44.

In the present invention, FIG. 2 shows a state in which the changeover switch 12 is in the neutral position, and the movable contact 43 is in the fourth position.
As shown in the figure, it is separated from the fixed contact 44.

Now, if you move the selector switch 12 to the left in Fig. 2,
The first stopper 9 comes into contact with the first projection 13 and disables rotation of the shaft support 4, and the second projection 14 sinks into the 20th lock recess 31 so that the second stopper 10 does not come into contact with it. , the internal gear 2 can rotate freely, and at the same time the movable contact 43
moves to the position a in FIG. 4 and comes into contact with the fixed contact 44,
The motor 5 is connected to a power source and rotates.

When the motor 5 rotates in this way, the sun gear 1 rotates first, and when the shaft support 4 stops, the planetary gear 3 rotates at a fixed position, rotates the internal gear 2, and drives the drive rod 26 by the eccentric cam 15. The trimmer can be used by reciprocating and driving the movable blade 8 reciprocally.

Conversely, when the changeover switch 12 is operated to the right, the second protrusion 14 comes out of the second recess 29 and protrudes through the neutral position, and the first protrusion 13 moves into the tenth recess 31.
At the same time, the movable contact 43 reaches the position b in FIG. 4 and contacts the fixed contact 44, causing the motor 5 to rotate. 2 stops rotating, and conversely to the above, the planetary gear 3 is stopped, and the internal gear 2 revolves around the sun gear 1 to rotate the shaft support 4, causing the main blade 7 to rotate or reciprocate. You can shave your beard.

In addition, the sun gear 1, the internal gear 2, the shaft support 4, and the rotating shaft 6
, the main blade 7, and the movable blade 8 can be connected in any combination other than the above.

In the present invention, since the main blade and the movable blade are driven using the planetary gear mechanism as described above, the drive path of the main blade and the drive path of the movable blade are selectively locked. By this, only by stopping one, only the other is selectively driven to rotate, and in order to selectively lock the main blade and the movable blade, a planetary gear mechanism is used to drive each of both blades. First and second stoppers are provided on the outer periphery of the two elements, and first and second protrusions are provided that selectively protrude from the changeover switch, and the protruding first and second protrusions are connected to the first and second stoppers. Since the main blade and the movable blade can be driven separately by a simple sliding operation of the changeover switch, there is no need for a movable clutch that moves in the direction of the rotation axis. Therefore, the space in the vertical direction becomes smaller,
It has the advantage of being compact, and by changing the number of teeth of each gear of the planetary gear mechanism, the drive speeds of the main blade and movable blade can be set to appropriate independent speeds.

In addition, an elastic leg is installed vertically from the changeover switch, and the movable contact provided on the elastic leg can freely contact and detach from the fixed contact, so switching between the main blade and the movable blade and opening and closing the motor power can be done in a single operation. You can do both at the same time using a selector switch.

In addition, in this case, since there is a neutral position where the power to the motor is cut off while switching between the main blade and the movable blade, the motor rotates slowly or stops at the time of switching and starts the next operation. This has the advantage that the impact force at the time of switching is alleviated.

[Brief explanation of the drawing]

FIG. 1 is a partially omitted vertical sectional view of an embodiment of the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. 3 is a B in FIG.
-A sectional view taken along line B, Figure 4 is an explanatory diagram of the same action as above, Figure 5 is
The figure is a partially cutaway side view of the conventional example, and FIG. 6 is an explanatory view of the operation of the same conventional example, in which 1 is a sun gear, 2 is an internal gear, 3 is a planetary gear, 4 is a shaft support, and 5 is an explanatory diagram of the operation of the conventional example. Motor, 6 is rotating shaft, 7
1 is a main blade, 8 is a movable blade, 9 is a first stopper, 10 is a second stopper, 11 is a housing, 12 is a changeover switch, 13
14 is a first protrusion, 14 is a second protrusion, 43 is a movable contact, and 44 is a fixed contact.

Claims (1)

[Claims] 1 One of the sun gear, internal gear, and planetary gear shaft support of the planetary gear mechanism is fixedly connected to the rotating shaft of the motor, and one of the remaining two drives the main blade, and the other A switching switch is configured to drive the movable blade of the trimmer, and a first stopper and a second stopper are provided on the outer periphery of an element for driving the main blade and the movable blade, respectively, and a switching switch is provided in a housing surrounding the outer side of the planetary gear mechanism. The changeover switch is provided with a first protrusion and a second protrusion that are simultaneously recessed into the inner circumferential wall surface of the housing and can be selectively protruded; 1. An electric shaver characterized in that the first and second stoppers are selectively brought into contact with the second protrusion, and a movable contact provided on the changeover switch can be brought into contact with and detached from a fixed contact.