JPS6214307B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electric shaver, and more particularly to an electric shaver equipped with a sharpening unit.

[Conventional technology]

Conventionally, in this type of electric shaver, the sharpening unit is rotatably supported relative to the razor body using its longitudinal side as a fulcrum, and the sharpening unit is rotated to the operating position only when the shaver is used. A tool has already been proposed in which the cutting edge protrudes from the main body and the cutting unit is rotated to the storage position when the cutting edge is not in use.

[Problems to be Solved by the Invention] However, in this device, the housing window is provided in the main body, and the sliding unit is rotated within this housing window, so that the housing window does not protrude too far. Sometimes, the inside of the razor is exposed to the outside through the storage window, and hair and dust easily enter the razor through the storage window, and these adhere to drive parts such as the motor and driver, obstructing the movement of the drive parts. There was a fear that I might do it. Therefore, it is necessary to form a shielding wall on the rear side of the storage window integrally with the main body, or to install it separately later, which imposes dimensional restrictions on the edge unit and also increases the This has the disadvantage that the radius of rotation becomes smaller and the amount of protrusion is restricted, and the structure for rotating the edge unit is also restricted and complicated due to the presence of the shielding wall.

[Means for solving problems]

The present invention has been made in view of the above-mentioned drawbacks, and in an electric shaver equipped with an edge unit that is rotated to protrude and housed with respect to the main body, when the edge unit is in the edge protrusion state, the front edge of the edge unit is of,
In the stored state, the top surface doubles as a lid for the opening.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 4. The razor main body 1 has an upper part as a cutting part 1a, a lower part as a gripping part 1b, and an upper front surface of the cutting part 1a. A rotary shaving head 2 is provided, and a sharpening unit 3 is provided at the center of the back of the hair cutting section 1a, and the sharpening unit 3 has a fixed blade 5 mounted in a sharpening blade support 4, A movable blade 7, on which a drive lever 8 is integrally formed, is pressed against the fixed blade by a compression spring 6, so that the cutting edge portions of the fixed blade 5 and the movable blade 7 are sharply cut into the blade support 4.
A fulcrum pin 9 configured to protrude from the front surface 4a of
By fitting into a fulcrum hole (not shown) drilled in the periphery of the opening 11 of the case 10, the crease unit 3 can be freely rotated about the longitudinal direction within the opening 11. Supported. Therefore,
During the edge protrusion operation, the front surface of the edge blade support 4
a faces the opening 11, and the cutting edges of the fixed blade 5 and the movable blade 7 protrude.

Here, in the sharply protruding state, the front surface 4
a, and its upper surface 4b in the sharply stored state
In order to be able to respectively close the openings 11, the sharp edge support 4 is formed into a substantially rectangular box shape with at least a front surface 4a and a top surface 4b substantially corresponding to the openings 11. .

Further, the operation knob 13 having the lid body 14 slidably fitted into the fitting hole 12 of the case 10 is made of a molded product of synthetic resin such as polyacetal.
Elastic arm portion 15 having elongated holes 16 at both upper ends thereof
are integrally formed. The elongated hole 16 of the elastic arm portion 15 is fitted into an actuation pin 18 protruding from the outer side wall of the edge cutting blade support 4, and is spaced above the elongated hole 16 at a distance approximately equal to the diameter of the actuation pin 18. A neck portion 17 having a narrow hole width is formed. In the figure, 19 is a drive motor, 20 is an eccentric cam, and 21 is a storage battery.

In the electric shaver configured in this manner, when the operating knob 13 is in the downwardly pressed position as shown in FIG. Located below the pivot point of the sled unit 3,
The rear part of the edge cutting blade support 4 is pressed by the elastic force of the elastic arm part 15 via the actuating pin 18, and the upper surface of the edge cutting unit 3 is pressed against the upper edge of the opening 11 of the case 10. 3 is firmly held in an operating position where its cutting edge protrudes from the case 10 without wobbling.

At this time, as shown in FIG.
1 is closed by the front surface 4a of the edge cutting blade support 4, that is, the front surface 4a of the edge cutting unit 3, and the drive lever 8 of the movable blade 7 is closed by the eccentric cam 2.
0, the movable blade 7 can be reciprocated by driving the motor 19 to perform a cutting action. Therefore, when the shaver is driven, the opening 11 that communicates the inside and outside of the razor body 1 is reliably closed by the front face 4a of the razor unit 3, and the hair and dirt cut by the razor are removed from the razor body 1. It can reliably prevent intrusion into the interior.

Now, if you push up the operation knob 13,
The elastic arm portion 15 integrally formed therewith moves upward, and the actuating pin 18, which is locked above the elongated hole 16 by the neck portion 17, also moves upward, so that the edge sliding unit 3 is moved upward from the fulcrum pin. It rotates clockwise around 9 as a fulcrum and reaches the storage position inside the case 10.
When the cutting edge of the cutting unit 3 hits the lower edge of the opening 11 of the case 10, the locking of the neck 17 of the operating pin 18 is released, so the insertion knob 13 is moved downward from the neck 17 of the elongated hole 16. The cover body 14, which is integrally formed with the cover body 14, covers and protects the cutting edge portion of the sharpening unit 3.

At this time, the opening 11 is closed by the upper surface 4b of the edge shaving unit 3, as shown in FIG. etc. can be prevented from entering.

Furthermore, in this storage position, the lower end of the elongated hole 16 is located above the fulcrum pin 9, and the rear part of the edge cutting blade support 4 is controlled via the actuating pin 18 by the elastic force of the elastic arm 15. Due to the pressing, the cutting edge of the sharpening unit 3 is pressed against the lower edge of the opening 11 of the case 10, and is firmly held without wobbling. At this time, the engagement between the drive lever 8 of the movable blade 7 and the eccentric cam 20 is released.

Moreover, in order to project the sharpening unit 3 to the operating position again, the operation knob 13 may be pushed down. That is, in this case, first, the lid body 14 formed integrally with the operation knob 13
moves downward, and the elastic arm 15 also moves downward, but since there is some play in the elongated hole 16,
Only during that time, the operating pin 18 does not move, the edge unit 13 remains in its retracted position, and the lid body 14
The cutting edge, which had been covered by

At this time, it is necessary to prevent the tensioning unit 3 from being rotated counterclockwise due to the frictional engagement between the elongated hole 16 and the operating pin 18. That is, as shown in FIG. 3, the operating pin 18 is in the storage position in which it is engaged with the lower end of the elongated hole 16. Rotating fulcrum P of edge sliding unit 3 and operating pin 18
The distance between the point pressed by the elastic arm 15, that is, the pressing point Q of the edge unit 3, in the vertical direction is a, the distance in the horizontal direction is b, and the elastic force of the elastic arm 15 is Assuming that F is the coefficient of static friction between the periphery of the elongated hole 16 and the actuating pin 18, then the force trying to rotate the edge unit 3 in the clockwise direction is
Tr is Tr=F・a Also, the force Tl that tries to rotate counterclockwise
is Tl=F・μ・b, and Tr>Tl must be satisfied, so F・a>F・μ・b ∴a/b>μ …(1), and set a to satisfy (1). , b needs to be set.

Then, when the operating knob 13 is pushed down further, the neck 17 of the elongated hole 16 and the operating pin 18 engage, so the operating pin 18 also begins to move downward, exposing the cutting edge and reaching the point where it can rotate freely. The sliding unit 3 is rotated so as to protrude outside the case 10, but when the upper surface of the sliding unit 3 reaches the operating position where it comes into contact with the upper edge of the opening 11 of the case 10, the sliding unit 3 is rotated so as to protrude outside the case 10. The unit 3 is prevented from moving when it stands up and protrudes at an angle of approximately 90 degrees from the stored state, and when the operation knob 13 is pressed down thereafter, the unit 3 crosses the neck 17 and engages with the upper end of the elongated hole 16. The state shown in Figure 1 is reached.

〔Effect of the invention〕

As explained above, the present invention includes the sharpening unit 3 in which the cutting edges of the sharpening blades 5 and 7 protrude from the front surface 4a, and the sharpening unit 3, which is rotatably supported on the razor case 10 side with its longitudinal side as a fulcrum. Then, by rotating the edge cutting unit 3, the front surface 4a and the upper surface 4b of the edge cutting unit 3 are selectively exposed through the opening 11 formed in the outer wall of the case 10, and the edge cutting blade 5 is selectively exposed. , 7 are protruded from and housed in the outer wall of the case 10, and in the sharply protruding state, the sharpening unit 3
Since the front surface 4a covers each of the openings 11 with the top surface 4b in the stored state,
There is no need to form a special blind wall etc. behind the opening of the case where the edge unit rotates.
The razor unit itself can cover the opening when the razor is protruding and when stored, simplifying the structure and reliably preventing hair and dust from entering the razor body. It is possible to provide an electric shaver with excellent properties.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of an electric shaver showing an embodiment of the present invention, and FIG. 2 is a vertical sectional side view of the same main part.
FIG. 3 is an explanatory diagram for explaining the turning force applied to the sharpening unit, and FIG. 4 is an exploded perspective view of the sharpening unit and the operating knob in the electric shaver shown in FIGS. 1 and 2. 3... Edge unit, 4a... Front side of edge unit, 4b... Top surface of edge unit, 5, 7...
Sharp blade (fixed blade, movable blade), 10...Razor case, 11...Opening.

Claims (1)

[Claims] 1. The edge cutting unit 3 with the edge parts of the edge cutting blades 5 and 7 protruding from the front surface 4a is rotatably supported on the razor case 10 side with its longitudinal side as a fulcrum, and the edge cutting unit 3 is By the rotation operation, the front surface 4a and the upper surface 4b of the edge cutting unit 3 are selectively exposed through the opening 11 formed in the outer wall of the case 10. protruding from the outer wall,
An electric shaver characterized in that the opening 11 is covered by the front surface 4a of the cutting unit 3 when the shaver is stored, and by the top surface 4b when the shaver is stored.