JP2919080B2 - 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 two blade heads.

[0002]

2. Description of the Related Art A reciprocating electric razor usually has only one blade head, and therefore, vibrations in the reciprocating direction are transmitted to a hand gripping the main body case, which causes discomfort. In order to solve this point, by using two blade heads and reciprocating a pair of movable blades arranged in parallel in each blade head in opposite phases, vibrations in the reciprocating direction are mutually canceled. There is something that I did.

In this case, it is necessary to provide a plurality of drivers for causing the movable blade of each blade head to reciprocate, and to make these drivers reciprocate with different phases. No. 47-13139 uses an eccentric cam and a slot in which it is engaged.
Further, there is also a type in which a pair of reciprocally movable drivers having elastic leg pieces on both side ends and a pair of eccentric shafts performing a rotational movement are connected by links.

[0004]

However, in the former case, the reciprocating motion is caused by the engagement between the eccentric cam and the slot.
Since the sliding sound of the engaging portion is high and the transmission point of the force to the driving member moves, the driving member is vibrated by the frictional force generated in the engaging portion in a direction orthogonal to the reciprocating direction. There is a disadvantage that.

In the latter case, as shown in FIG. 19, a pair of drivers 41 and 42 are arranged in parallel, and a pair of eccentric shafts 32 and 34 driven by the motor 3 are connected to the rotation center O of the motor 3. The eccentric shaft 3
2 and 34 and a pair of drivers 41 and 42,
36, the pair of drivers 41,
Although the reciprocating motion of the opposite phase is performed by the 42, since the pair of the drivers 41 and 42 are arranged in parallel, a line connecting the connection points of the respective drivers 41 and 42 with the links 35 and 36 is formed. 20 intersects the reciprocating direction X of the drivers 41 and 42. As a result, vibration is applied to the drivers 41 and 42 in the direction Y which is also orthogonal to the reciprocating direction X, as shown in FIG. In addition, there is a problem that the reciprocating stroke becomes shorter than twice the eccentric amount of the eccentric shafts 32 and 34, resulting in a load loss of the motor 3.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object the reciprocation of vibration not only in the reciprocating direction but also in the direction perpendicular thereto, and the load loss of the motor is small. To provide an electric shaver.

[0007]

According to the present invention, there is provided a drive element having an elastic leg and being reciprocally movable, and an eccentric shaft for eccentric rotation and the drive element being connected to each other. With a link that allows the child to reciprocate,
In a reciprocating electric shaver having a pair of drivers that reciprocate in opposite phases, a pair of eccentric shafts are provided symmetrically at positions sandwiching the center of rotation, and these eccentric shafts and each driver are respectively It is characterized in that the connection point of the connected link with the driver is provided on a straight line parallel to the reciprocating direction of the driver and passing through the rotation center.

According to the present invention, in converting the rotational motion into the reciprocating motion, no vibration is generated in any of the driving elements in a direction orthogonal to the reciprocating motion direction, and the reciprocating stroke is also equal to the eccentric amount of the eccentric shaft. It becomes twice the maximum value.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the illustrated embodiment. This reciprocating electric shaver is provided with two blade heads 1, 1 at the upper end of a main body 2 as shown in FIGS. Are arranged in parallel and parallel, and a trimmer blade 6 is attached to the upper end of a trimmer handle 60 which is arranged to be vertically movable along the surface of the main body 2.

The above-mentioned blade head 1 arranged at the upper end of the main body 2
As is clear from FIG. 6, the outer blade 12 is attached to the main body 2 via the frame 18 and the holding frame 15, and the outer blade 12 bent in an arch shape on the rectangular frame-shaped carrier 10 is provided. The two blade heads 1 and 1 are housed in a holding frame 15 having a rectangular frame shape, and as shown in FIG. Projected protrusion 1
A vertically long slot 16 formed in the holding frame 15
, Respectively, the two-blade heads 1 and 1 can float up and down independently of each other. In the figure, reference numeral 17 denotes a hook for detachably holding the holding frame 15 with respect to the frame 18.

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, a battery 30 and the like are disposed in the main body 2 via a mounting base 20. The movable blades 13 that are in sliding contact with the inner surface of the outer blades 12 in 1 and 1 are connected to connection cylinder portions 43 of the drivers 41 and 42 arranged in parallel and parallel via push-up springs 44, respectively.

The driving of the two drivers 41 and 42 by the motor 3 is performed as follows. That is, as shown in FIG. 7 to FIG. 9, an eccentric shaft 32 projects from the output shaft of the motor 3 via the base 31, and projects from the eccentric shaft 32 and the driver 41. The pin 46 is connected with the link 35. A base 33 is fixed to the upper end of the eccentric shaft 32, and the eccentric shaft 3 further protruded from the base 33.
4 is connected to a pin 47 projecting from the driver 42 by a link 36, and the motor 3 drives the two eccentric shafts 32,
When the link 34 rotates, the links 35 and 36 are connected to the mounting base 20.
The driving elements 41 and 42, which are easily bent in only one direction due to the presence of the elastic leg pieces 410 and 420 fixed at both ends by screws 39 and resilient, are caused to reciprocate.

At this time, the eccentric shafts 32 and 34 are connected to the motor 3
1 is provided at a symmetrical position sandwiching the rotation center O, that is, at a position shifted by 180 °, and as is apparent from FIG. Of the driver 41 by protruding from the piece 421 that is also recessed below the driver 41 of the
The pin 46 protruding from just below, the rotation center O, and the pin 47 are arranged on a straight line parallel to the reciprocating direction X of both the drivers 41 and 42. As a result, both drivers 4
1 and 42 in opposite directions, that is, both drivers 41,
The phase of the reciprocating motion of the motor 42 is 180 ° different from each other so that the vibrations cancel each other. Further, the vibration in the direction Y orthogonal to the reciprocating motion X does not occur in both the drivers 41 and 42, and furthermore, the eccentricity The value of twice the amount of eccentricity of the shafts 32, 34 is the reciprocating stroke of the drivers 41, 42. The links 35 and 36 may be formed integrally with the drivers 41 and 42 as having elasticity.

The flat portions 310 and 330 provided on the side surfaces of the bases 31 and 33 clarify the directionality of the bases 310 and 330, thereby facilitating the assembling accuracy. Base 31
Is formed as a pressing surface when the blocks of the bases 31 and 32 and the link 35 are press-fitted to the output shaft of the motor 3 so that the press-fitting can be performed without pressing the base 33. That's what we do. The link 36 is attached to the pin 47 side and is prevented from falling off by heat sealing at the tip of the pin 47, thereby improving the assemblability.

The provision of the piece 411 that covers the piece 421 on the driver 41 side increases the creepage distance from the upper surface opening of the main body 2 through which the connecting cylinders 43 penetrate to the eccentric shaft 34. In addition, it is possible to prevent the packing 70 from dropping to the driving elements 41 and 42 side when cleaning shavings,
It also prevents the sound generated from 5, 36 from leaking to the outside. Wall 4 suspended from each driver 41, 42
12, 422 is also to prevent this sound leakage. Wall 4
A window 413 provided at 12 is a viewing window for facilitating assembly.

Further, the screw 3 in each of the drivers 41 and 42
9, both ends of the mounting base 20 and the inner surface of the main body 2 are not only partially overlapped with each other up and down, but also the projections 416 and 426 and the recesses 417 and 427 are engaged with each other. To prevent rattling of each other, and protrusions 201 and
02 is a recess 417, 428 in each driver 41, 42.
And the direction of engagement coincides with the direction in which the drivers 41 and 42 are assembled to the mounting base 20, so that the positioning and fixing of the two drivers 41 and 42 are easy. Has become.

In mounting the motor 3 to the mounting base 20, a vibration isolator 80 made of an elastic material is fixed on the surface of the motor 3 as shown in FIG. As shown in the figure, a bearing metal 301 for receiving the rotating shaft 300 of the motor 3 and the motor case 30
2 with an elastic body 303 made of rubber or the like interposed therebetween.
Even if the rotating shaft 300 receives a lateral load, its deflection is reduced by the elastic body 30.
3, so that the motor 3 itself also has a soundproofing effect. As described above, the drivers 41, 4
Since the vibration caused by the reciprocating drive of the motor 2 is canceled, the sound and vibration generated by the motor 3 itself are hardly transmitted to the main body 2 by utilizing the fact that the motor 3 does not need to be firmly fixed. That's why.

5 to 7, reference numeral 25 denotes a metal fitting for receiving a hinge plate 26 attached to the frame 18, and 27 denotes a hinge plate 26 having one end rotatably connected to the main body 2 by the hinge plate 26. A hook for locking the other end of the frame 18, a spring 28 for urging the hook 27, and a packing 70 for dustproofing an upper opening of the main body 2 through which the connecting cylinders 43 of the drivers 41 and 42 are inserted. Reference numerals 71 denote holding members for the packing 70. The screws 39 for fixing the drivers 41 and 42 also serve to fix the holding members 71. 7 in FIGS. 2 and 4 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 freely slidable up and down.
0, as shown in FIG. 12,
Fixed blade 600, movable blade 601, and movable blade 601 are fixed blade 6
The fixed blade 600 is fixed to a protrusion 605 protruding from the upper end of the trimmer handle 60, and the movable blade 601 has a sliding direction defined by engagement with the protrusion 605. Both ends thereof are engaged with the spring fixing grooves 606 on both upper ends of the trimmer handle 60 and are attached to the trimmer handle 60.

A cover 63 is attached to the back surface of the trimmer handle 60, and a trimmer driver 62 is supported in a space between the cover 63 and a shaft 61 projecting from the back surface. The trimmer driver 62 having the lower end engaging portion 620 projecting rearward from the elongated hole 630 provided in the cover 63 and having the upper end connected to the movable blade 601, when the trimmer handle 60 is moved upward. Joint 45 attached to connecting cylinder 43 of driver 42
And the engaging portion 63 at the lower end is engaged to transmit the reciprocating motion of the driver 42 to the movable blade 601.

A cover 8 for pressing the upper surface of the spring 602 and hiding the upper rear surface of the trimmer handle 60.
Is provided with a locking hole 632 in which a hook 607 protruding from the trimmer handle 60 is locked.
2 is prevented from coming off the shaft 61, and a pair of click springs 631, 631 are integrally protruded from the lower end. A mounting hook 608 protruding from the rear surface of the trimmer handle 60 is provided in the engagement groove 2 shown in FIG.
When the click spring 631 is slidably engaged with the main body 2 up and down, the click spring 631 engages with a plurality of click projections 207 provided on the main body 2 and applies a click.

As shown in FIGS. 10 and 11, the joint 45 for connecting the driver 41 and the trimmer driver 62 has thin blade pieces 450 integrally protruding on both sides in the reciprocating direction. However, this is provided in order to prevent the joint 45 itself from covering the gap as the movable space of the joint 45 generated between the main body 2 and the cover 63 and to prevent the shavings from falling into the inside. The wing piece 450 is attached to the upper surface of the holding plate 71 so as to be in contact therewith. Compared to the case where a dust-proof member using a malt plane or the like is arranged, the frictional resistance is reduced, the load due to sliding can be reduced, and there is an advantage that the dust is not turned up when cleaning whiskers.

FIGS. 17 and 18 show another embodiment of the present invention. In this embodiment, a base 31 is provided with a deviation portion 315 as a balance weight. That is, link 3
5 is F1, the driving force of the driving element 42 by the link 36 is F2, and the centrifugal force by the biasing unit 315 is F3. By setting F1 = F2 + F3, this deviation is obtained. By providing the quantity section 315 on the side close to the motor 3, the rotation is stabilized and the vibration is reduced.

[0024]

As described above, in the present invention, since a pair of drivers reciprocatingly move in opposite phases is provided, vibrations in the reciprocating direction of the drivers are canceled each other. Moreover, a pair of eccentric shafts are provided symmetrically at positions sandwiching the center of rotation, and a connection point between the eccentric shaft and the driver of the link connecting each driver is set in parallel with the reciprocating direction of the driver. In addition, since it is provided on a straight line passing through the rotation center, no vibration is generated in any of the driving elements in a direction orthogonal to the reciprocating direction, so that the vibration is small and no discomfort is caused. In addition, the reciprocating stroke of both drivers also has a maximum value of twice the amount of eccentricity of the eccentric shaft, so that power efficiency is high.

[Brief description of the drawings]

FIG. 1 is a plan view showing a main part of an embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a rear view of the above.

FIG. 4 is a longitudinal sectional view of the same.

FIG. 5 is a transverse sectional view of the same.

FIG. 6 is an exploded perspective view of the blade head.

FIG. 7 is an exploded perspective view of the same drive block.

FIG. 8 is an exploded perspective view of the above drive block.

FIG. 9 is a sectional view of the above.

FIG. 10 is a perspective view showing an arrangement portion of the above joint.

FIG. 11 is a perspective view showing a state in which the above joint is arranged.

FIG. 12 is an exploded perspective view of the same trimmer portion.

FIG. 13 is a rear view of the trimmer part according to the third embodiment.

FIG. 14 is a perspective view showing a trimmer mounting portion of the main body of the above.

15 (a) is a perspective view, and FIG. 15 (b) is an exploded perspective view showing the same motor.

FIG. 16 is a cross-sectional view of the same motor.

FIG. 17 is an exploded perspective view of a drive block according to another embodiment.

FIG. 18 is a sectional view of the above.

FIG. 19 is a plan view of a conventional example.

FIG. 20 is an explanatory diagram of the operation of the above.

[Explanation of symbols]

 2 Body 32 Eccentric shaft 34 Eccentric shaft 35 Link 36 Link 41 Driver 42 Driver

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Takashi Yoneda 1048 Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd. (56) References JP-A-56-20484 (JP, A) JP-A-47-13139 ( JP, A) Japanese Utility Model 52-165791 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B26B 19/28 B26B 19/04

Claims (1)

(57) [Claims] 1. A reciprocating driver having leg pieces having elasticity, and a link connecting an eccentric shaft for eccentric rotation and the driver to reciprocate the driver. In a reciprocating electric shaver having a pair of drivers that reciprocate in opposite phases, a pair of eccentric shafts are provided symmetrically at positions sandwiching the rotation center, and the eccentric shaft and each driver A connection point between the link and the driver connecting each of the links is provided on a straight line parallel to the reciprocating direction of the driver and passing through the rotation center.