JP3157848B2 - Reciprocating electric razor - Google Patents

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, and more particularly to a reciprocating electric shaver having a plurality of blade heads.

[0002]

2. Description of the Related Art To meet the demand for faster shaving, there is provided a type in which two blade heads are juxtaposed as shown in Japanese Utility Model Publication No. 36-26751. . In this publication, a pair of eccentric cams are provided on the output shaft of the motor so as to be shifted in the axial direction, and each eccentric cam is provided with a reciprocating drive element connected to the inner blade of each blade head. By combining
The two drivers are caused to reciprocate. At this time, in order to reduce the influence of the vibration of the inner blade, the movements of the two drivers are set in directions opposite to each other.

[0003]

In this case, the vibration of the inner blade in the reciprocating motion direction is canceled out by the two blade heads moving in opposite directions. Because the eccentric cam must be mounted with the eccentric cam shifted in the axial direction, forces in opposite directions are applied to the motor side portion and the tip side portion of the output shaft, and a bending moment is applied, There is also a problem in terms of noise and vibration as well as increased wear of the motor bearing.

[0004] The present invention has been made in view of such a point, and an object of the present invention is to provide a motor having a plurality of blade heads, in which vibration noise is small and unnecessary load is applied to the motor. An object of the present invention is to provide a reciprocating electric shaver that can extend the life of a bearing of a motor without using the electric shaver.

[0005]

According to the present invention, there is provided an eccentric member connected to an output shaft of a motor, and a plurality of driving members engaged with the eccentric member to reciprocally drive a plurality of inner blades in opposite directions. A reciprocating electric shaver having a shaft and a plurality of eccentric members having an eccentric direction opposite to the eccentric direction are provided on the output shaft of the motor, and the eccentric member has the same eccentric direction. Each of the eccentric members having different eccentric directions is provided on both sides in the axial direction with the same eccentric direction.
The drive load applied to the eccentric member individually is shifted to a different eccentric direction.
As a half of the driving load applied to the core member,
The first feature is that the drive loads applied to the two types of eccentric members are equal, and a plurality of eccentric members which are opposite to each other in the eccentric direction in the output shaft of the motor are provided in the axial direction. Of the eccentric members to which the driving loads are connected, respectively.
Of the same eccentric direction as the eccentric member located at one end in the axial direction.
An eccentric weight is provided at the other end in the axial direction.
The drive loads on the two types of eccentric members with different directions are equalized.
And a second feature that is.

According to the present invention, the forces can be balanced in the axial direction of the output shaft and in the direction perpendicular to the output shaft, so that a bending force which causes the shaft to fall can be prevented from being applied to the output shaft.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The reciprocating electric razor according to the present invention will now be described in detail with reference to the illustrated embodiment. A trimmer blade 6 is attached to the upper end of a trimmer handle 60 which is arranged to be able to move up and down along the surface of the trimmer. The blade head 1 disposed at the upper end of the main body 2
And a frame 18 and a holding frame 15, and as shown in FIG. 6, the outer blade 12 bent in an arch shape is mounted on a rectangular frame-shaped carrier 10. The two blade heads 1, 1 are housed in a rectangular frame-shaped holding frame 15, and as shown in FIG. 11 is holding frame 1
The double blade heads 1 and 1 can float up and down independently of each other by engaging with the long holes 16 formed in the up and down direction. In the drawing, reference numeral 17 denotes the holding frame 15 and the frame 1
8 is a hook that is detachably engaged with the hook 8.

On the other hand, a motor 3 and a pair of drivers 41 and 42 for converting the rotation of the motor 3 into reciprocating motion are disposed in the main body 2 via a mounting base 20.
1, the inner blades 13 slidingly contacting the inner surface of the outer blades 12 are respectively pushed up by connecting springs 44 on connecting cylinder portions 43 of the drivers 41 and 42.
Are connected via Both drivers 4 by motor 3
The driving of the motors 1 and 42 is performed as follows. That is, as shown in FIGS. 5 to 7, eccentric members 31, 32, and 33 are sequentially attached to the output shaft 30 of the motor 3 while being shifted in the axial direction, and are formed as circular eccentric cams. Eccentric cam 32
And a pin 46 protruding from the driver 41 are connected by a link 35. The other two eccentric members 31, 33 having the same eccentric direction and a pin 47 projecting from the driver 42 are connected by a link 36, and a link 3
5 is loosely fitted to the eccentric member 32 and the forked end of the link 36 is loosely fitted to the eccentric members 31 and 33.
When the eccentric members 31, 32, 33 are rotated by the motor 3, the links 35, 36
The reciprocating motion is performed on the drivers 41 and 42, which are fixed and easily bent in only one direction. At this time,
The phases of the reciprocating motion of the two drivers 41 and 42 are 180 degrees so that the movements of the two drivers 41 and 42 are in opposite directions.
The positions of the pins 46 and 47 are determined while the eccentric directions of the eccentric member 32 and the eccentric members 31 and 33 are shifted by 180 ° so as to be different from each other.

Since the link 36 is engaged with the output shaft 30 at two eccentric members 31 and 33 located above and below the eccentric member 32 at which the link 35 is engaged. In this reciprocating electric shaver,
In the reciprocating drive of the inner blades 13, 13 via the drivers 41, 42, the eccentric member 32 is driven by the
And the force required to drive the inner cutter 13 (= the eccentric member 32
When the F such driving load), the eccentric member 31 and 33
, A driving load of の of the force F required to drive the driver 42 and the inner blade through the link 36 is applied in the opposite direction, and the output shaft 30 is balanced because the forces are balanced in the axial direction of the output shaft 30. Since no bending force is applied to the shaft 30, the shaft does not easily fall down, and the load on the bearing of the motor 3 is small.

Here, as shown in FIG. 8A, the lines connecting the pins 46 and 47 are made parallel to the reciprocating directions of the drivers 41 and 42, so that the drivers 41 and 42 are parallel. 8 and no vibration in a direction orthogonal to the axial direction of the output shaft 30 of the motor 3, respectively, as shown in FIG. 8B, the line connecting the pins 46 and 47 is a driver element. 41, 4
It does not have to be parallel to the two reciprocating directions.

In FIGS. 1 and 5, reference numeral 25 denotes a bracket for receiving a hinge plate 26 attached to the frame 18, and 27 denotes a frame whose one end is rotatably connected to the main body 2 by the hinge plate 26. A hook for locking the other end of 18, a spring for urging the hook 27, a dust-proof packing 60 for opening the upper surface of the main body 2 through which the connecting cylinders 43 of the drivers 41 and 42 are inserted, 61 Is a holding member for the packing 61. 9 is a battery, and 7 in FIG. 2 is a switch handle.

As described above, the trimmer blade 6 is provided on the surface of the main body 2 so as to be vertically slidable.
The trimmer handle 60 is provided at the upper end of the trimmer blade 60 and supports a trimmer driver 62 connected to the movable blade of the trimmer blade 6 on the inner surface of the upper part of the trimmer handle 60.
When the trimmer handle 62 is moved upward, the engagement portion 63 at the lower end is engaged with the joint 45 attached to the connecting cylinder 43 of the driver 42, and the trimmer driver 62 reciprocates. The power is transmitted to the movable blade of the trimmer blade 6.

FIGS. 9 and 10 show another embodiment. Here, eccentric members 31, 32, and 33 having eccentric shafts 31a, 32a, and 33a, respectively, are used.
The eccentric member 32 is fixed to the tip of the eccentric shaft 31a, the eccentric member 33 is fixed to the tip of the eccentric shaft 32a, and the eccentric shaft 32a and the pin 46 of the driver 41 are connected by the link 35. The link 33 a and the pin 47 of the driver 42 are connected by a link 36. FIG. 11 (a) shows a portion of the bifurcated end of the link 36 that is loosely fitted to the eccentric shaft 31a in a C-shape, that is, a partially cut-out ring shape. The figure shows the result of improvement. The link 36 may have the shape shown in FIG. 11B or may be divided into two as shown in FIG. 11C. Further, the links 35 and 36 may be formed as flexible members integrally with the drivers 41 and 42, respectively.

FIGS. 12 and 13 show still another embodiment, in which an eccentric member 37 having an eccentric shaft 38 bent in a crank shape is used, and the center of the eccentric shaft 38 is driven by a driver 41. , And both ends of the eccentric shaft 38 having different eccentric directions from the central portion thereof are engaged with a pair of long holes 76 provided in the driver 42. 14 and 15 show the eccentric member 3 attached to the output shaft 30 of the motor 3.
An eccentric member 33 having an eccentric shaft 33a is fixed to the tip of an eccentric shaft 31a protruding from the eccentric shaft 31a.
And the pin 47 of the driver 42 are connected by a link 36. Further, an eccentric weight portion 31b is formed integrally with the eccentric member 31, and an eccentric weight 39 is interposed in a fitting portion between the link 35 and the eccentric shaft 31a. Thus, an example is shown in which the forces in the axial direction of the output shaft 30 of the motor 3 and in the direction orthogonal thereto are balanced. That is, link 3
6, while the driver 42 is connected to the eccentric shaft 33a, the eccentric shaft 31 is provided with an eccentric weight portion 31b which is eccentric in the same direction as the eccentric shaft 33a. By making the eccentric weight portion 31b engage, the axial balance is obtained,
Further, an eccentric weight 39 is provided to counteract an increase in driving load in one eccentric direction due to the addition of the eccentric weight portion 31b . In this case, since the total number of the eccentric members can be reduced, the overall length in the axial direction can be reduced.

As shown in FIGS. 16 and 17, when the sizes of the two inner blades 13 are different, the eccentric
Eccentric weight 39 despite the existence of the weight portion 31b
Can be balanced without providing
You . In each of the embodiments described above, the case where the number of the inner cutters 13 is two is shown. However, FIGS. 18 and 19 show the case where the number of the inner cutters 13 is three. 31a,
Three eccentric members 31, 32, 3 provided with 32a, 33a
3, the eccentric member 32 is fixed to the tip of the eccentric shaft 31a, the eccentric member 33 is fixed to the tip of the eccentric shaft 32a, and the eccentric shaft 32a and the pin 46 of the driver 41 are connected by the link 35. The eccentric shaft 33a and the pin 47 of the driver 42 are connected by the link 36, and the pin 50 of the driver 49 and the eccentric shaft 31a are connected by the link 40, so that the eccentric shafts 31a and 33a located coaxially. The driven elements 49 and 42 are driven in the same phase by the eccentric shaft 32a.
The driving element 41 is driven back and forth in opposite phases.
In view of the weight of each inner blade 13, since the forces cannot be balanced in this state, the inner blades 13 are driven independently in opposite phases.
The force is balanced by adding an eccentric weight 39 to a fitting portion between the eccentric shaft 32a and the link 35 for the driver 41 to be driven.

[0016]

As described above, according to the present invention, a plurality of eccentric members having opposite eccentric directions are provided in the axial direction on the output shaft of the motor, and the eccentric members having the same eccentric direction have different eccentric directions. Each eccentric member provided on both axial sides of the eccentric member and having the same eccentric direction.
Drive loads applied to the eccentric members with different eccentric directions
As half of the driving load, two types of eccentric directions different from each other
Since the drive load applied to the eccentric member is equal,
Or, among the eccentric members to which the drive loads are connected,
Eccentric member in the same eccentric direction as the eccentric member
A light source is provided on the other end in the axial direction, and the eccentric direction is further different
The drive load applied to the two types of eccentric members must be equal
From, which may take the balance of forces in the axial direction and the direction perpendicular thereto of the output shaft, as it can prevent the causative bending forces fall shaft to the output shaft for this is added In addition, in the case of having a plurality of inner blades, in addition to the reduction of the vibration noise by reversing the phase of the reciprocating vibration of the inner blade, the reduction of the vibration noise due to no unnecessary load applied to the motor. It is possible to extend the bearing life of the motor.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of one embodiment of the present invention.

FIG. 2 is a cross-sectional view of the same.

FIG. 3 is a front view of the same.

FIG. 4 is a rear view of the same.

FIG. 5 is an exploded perspective view of the reciprocating drive mechanism of the same.

FIG. 6 is an exploded perspective view of the blade head according to the first embodiment.

FIG. 7 is a cross-sectional view of the reciprocating drive mechanism of the above.

FIGS. 8A and 8B show a reciprocating drive mechanism of the above, wherein FIG. 8A is a plan view and FIG. 8B is a plan view of another example.

FIG. 9 is an exploded perspective view of a reciprocating drive mechanism according to another embodiment.

FIG. 10 is a cross-sectional view of the reciprocating drive mechanism of the above.

FIG. 11 shows another example of the link, (a) is a perspective view,
(b) is a perspective view of another example, and (c) is a perspective view of still another example.

FIG. 12 is an exploded perspective view of a reciprocating drive mechanism according to another embodiment.

FIG. 13 is a cross-sectional view of the reciprocating drive mechanism of the above.

FIG. 14 is an exploded perspective view of a reciprocating drive mechanism according to still another embodiment.

FIG. 15 is a cross-sectional view of the reciprocating drive mechanism of the above.

FIG. 16 is an exploded perspective view of a reciprocating drive mechanism according to still another embodiment.

FIG. 17 is a cross-sectional view of the reciprocating drive mechanism of the above.

FIG. 18 is an exploded perspective view of a reciprocating drive mechanism according to a different embodiment.

FIG. 19 is a sectional view of the reciprocating drive mechanism of the above.

[Explanation of symbols]

 3 Motor 30 Output shaft 31 Eccentric member 32 Eccentric member 33 Eccentric member 39 Eccentric weight 41 Driver 42 Driver

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B26B 19/28

Claims (3)

(57) [Claims] 1. A reciprocating electric shaver comprising an eccentric member connected to an output shaft of a motor, and a plurality of drivers engaged with the eccentric member to reciprocate a plurality of inner blades in opposite directions. A plurality of eccentric members are provided on the output shaft of the motor that are opposite to each other in the eccentric direction in the axial direction, and the eccentric members having the same eccentric direction are different from the eccentric members having different eccentric directions. Eccentric direction
Drive load applied to each eccentric member with the same direction
Half of the drive load applied to eccentric members with different eccentric directions
As a drive for two types of eccentric members having different eccentric directions.
A reciprocating electric razor characterized by a uniform load . 2. A reciprocating electric shaver comprising: an eccentric member connected to an output shaft of a motor; and a plurality of drivers engaged with the eccentric member to reciprocate a plurality of inner blades in opposite directions. A plurality of eccentric members are provided on the output shaft of the motor, which are opposite to each other in the eccentric direction, in the axial direction, and one of the eccentric members to which the driving load is connected is connected in the axial direction.
Eccentric weight in the same eccentric direction as the eccentric member located on the end side
Are provided on the other end side in the axial direction, and the eccentric directions are different.
A reciprocating electric shaver characterized in that drive loads applied to various kinds of eccentric members are equalized . 3. Driving by eccentric members having different eccentric directions.
Provide eccentric weights according to the difference in load, and
The drive loads on the two eccentric members are equalized
3. The reciprocating electric device according to claim 1 or 2,
Razor.