JPH06261986A - Electric razor - Google Patents

Abstract

PURPOSE:To prevent the body of an electric razor from enlarging even though it is applied to a comparatively small shaving head rotating structure, where only one set of an outer cutter and inner cutter is furnished, by introducing such an arrangement that the axis of the outer cutter body tilts in an arbitrary direction and the tip of the output shaft and the inner cutter body tilt in any arbitrary direction relatively while moving interlockingly in the direction around the output shaft. CONSTITUTION:A shaving head 30 has a base 31, an outer cutter mounting table 32 with outer cutter 33, and an inner cutter mounting table 34 with inner cutter 35. The base 31 and outer cutter 33 are held on a mounting wall 25 in such a way that their axes 0 can tilt in any arbitrary direction. The inner cutter 35 is in resilient contact with the inner surface of the outer cutter 33 in such a way as capable of movement in slide contact, while the inner cutter mounting table 34 is engaged by the output shaft 27c of a drive motor 27 through a ball joint 40 in such a way as capable of tilting in any direction relatively. The inner cutter mounting table 34 and a coupling shaft 42 are arranged with possibility of relative rotating to a certain minor extent in the direction round the axes of the coupling shaft 42 and output shaft 27c, and after a detent vane 42c is brought into contact with a detaining groove 34c, they can make movement interlockingly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric shaver in which a shaving head having an outer blade is provided in a main body which also serves as a gripper so as to be tiltable in any direction.

[0002]

2. Description of the Related Art As an electric shaver of this type, for example, those shown in FIGS. 6 and 7 are considered.

In the electric shaver shown in FIG. 6, a spherical mounting wall 2 is provided at one end of a hollow main body 1 which also serves as a grip, and an insertion hole 3 is formed in the center of the mounting wall 2. A ring-shaped pedestal 4 is provided around the spherical concave portion 2a of the second body and is integral with the main body 1. A shaving head SH is mounted on the mounting wall 2 so as to be rotatable in an arbitrary direction.

The shaving head SH has a blade mount 5 formed in a hollow shape and having a spherical portion 5a on the base side supported by a pedestal 4, and a tip end of the blade mount 5 provided at intervals of 120 °. It has two circular outer blades 6. The shaving head SH has a motor 7 whose one end is inserted into the mounting hole 5b at the base of the blade mount 5, and a mounting plate 8 fixed to one end of the motor 7 and arranged in the blade mount 5. Have. The other end of the motor 7 is inserted into the main body 1 through the insertion hole 3.

At the other end of the motor 7, a holding ring 9
The peripheral edge of is fitted and the nut 10 is screwed. The nut 10 abuts the holding ring 9 on the inner surface of the mounting wall 2 and holds the blade mounting base 5 on the mounting wall 2 between the holding ring 9 and the mounting plate 8 so as to be rotatable in any direction. I am letting you.

The shaving head SH is provided inside the blade mount 5 and is provided integrally with the circular inner blade 11 and the circular inner blade 11 arranged corresponding to each circular outer blade 6. A rotary shaft 12 rotatably held by a plate 8 and a rotary shaft 1
2 and a gear 13 provided integrally with the output shaft 7 of the motor 7.
The pinion 14 is fixed to a and meshes with the gear 13.

When the electric shaver having such a structure is used, the rotation of the motor 7 is transmitted to the circular inner blade 11 via the pinion 14, the gear 13, and the rotary shaft 12, and the circular outer blade 6 moves to the inside of the blade mount 5. The beard inserted into the blade is cut between the circular inner blade 11 and the circular outer blade 6.

On the other hand, in this case, the shaving head S
The H is rotated around the center C between the three circular outer blades 6, and the circular outer blade 6 rotates following the shape of the user's face.

[0009]

However, in the electric shaver having such a structure, since the motor 7 is rotationally displaced in the main body 1, the main body 1 becomes large to allow the rotational displacement of the motor 7. It was.

Therefore, the head rotating structure of the shaving head SH for an electric razor described above is not suitable for an electric razor having a relatively small shaving head provided with only one set of outer and inner blades. there were.

Therefore, even if the present invention is applied to a rotating structure of a relatively small shaving head provided with only one set of outer and inner blades, the main body for supporting the shaving head does not become large. The purpose is to provide an electric razor.

[0012]

In order to achieve this object, the present invention is formed in a dome shape from a main body which also serves as a gripping portion, an outer cutter mount and an outer cutter attached to the outer cutter mount. An outer cutter attached to the main body, an inner cutter mount rotatably disposed in the outer cutter body around the center line of the outer cutter, and the outer cutter attached to the inner cutter mount. An inner blade body made of an inner blade slidably contacting an inner surface so as to be slidable, and a motor arranged and fixed in the main body and rotating the inner blade body by engaging an output shaft with the inner blade mounting base. In the electric razor including, the outer blade is held by the main body so that the center line can be tilted in any direction, and the tip end portion of the output shaft and the inner blade can be tilted relatively in any direction. And an electric razor which is connected so as to be interlockable in the direction around the axis of the output shaft. It is characterized in that the.

[0013]

With this structure, the motor is fixed in the main body and does not move, and only the inner blade and the outer blade tilt in any direction with respect to the output shaft of the motor, and the outer blade is used. It will rotate following the shape of the person's face.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

In FIGS. 1A and 1B, 20 is a main body of the electric razor, and 30 is a shaving head mounted on the main body 20.

The main body 20 is formed in a hollow shape by aligning the half cases 21 and 22 with each other and fixing them with screws. The half cases 21 and 22 have a semi-cylindrical portion 21.
a, 22a and cylindrical portions 21b, 22 provided at right angles to one ends of the semi-cylindrical portions 21a, 22a and having one end closed.
b. The semi-cylindrical parts 21a and 22a also form a circuit housing part 23 that also serves as a grip part and houses a control circuit (not shown), and the cylindrical parts 21b and 22b form the motor housing part 2.
4 is forming.

A semispherical mounting wall 25 protruding inward is formed at the closed end of the cylindrical portion 21b, and a bottom wall 26 is provided at the closed end of the cylindrical portion 22b. A holding recess 25a is formed in the center of the inner surface of the mounting wall 25, and a holding cylinder 26a is formed in the center of the inner surface of the bottom wall 26. Moreover, the drive motor 27 is sandwiched and fixed between the mounting wall 25 and the holding tubular portion 26 in a state where the bearing tubular portions 27a and 27b at both ends are fitted to the holding recess 25a and the holding tubular portion 26a.
27c is an output shaft of the drive motor 27.

Further, an annular projection 25c is formed on the peripheral edge of the hemispherical recess 25b located outside the mounting wall 25, and the peripheral edge of the mounting wall 25 is opened to the hemispherical recess 25b at intervals of 120 °. The roller receiving recess 28 is formed, and the mounting wall 2
The hemispherical recess 2 communicates with the holding recess 25a in the center of
A small-diameter cylindrical portion 25d protruding toward the 5b side is integrally provided. 25e is a locking recess provided in the small-diameter cylindrical portion 25d.

The roller receiving concave portion 28 extends in the radial direction as shown in FIG. 3, and bearing concave portions 28a, 28a are formed on both side surfaces of the roller receiving concave portion 28, and each of the bearing concave portions 28a is shown in FIG. As described above, the shaft portion 29a integral with the spherical roller 29 disposed in the roller receiving recess 28 is rotatably held.
The radius passing through the center of the roller receiving recess 28 and the shaft portion 29a are orthogonal to each other.

The shaving head 30 has a hemispherical portion 31.
a and a base 31 having a screw portion 31b, and a screw portion 31b
A ring-shaped outer blade mounting base 32 screwed to the outer blade, and a braided and dome-shaped outer blade 33 integrally provided on the outer blade mounting base 32.
And an inner blade mounting base 34 arranged inside the outer blade 33, and an inner blade 35 mounted on the inner blade mounting base 34. The small-diameter cylindrical portion 25d is inserted into the insertion hole 31c provided in the center of the hemispherical recess 31a of the base 31, and the roller 29 has the hemispherical recess 31a.
Are brought into abutting engagement with each other. The outer blade mounting base 32 and the outer blade 33 form an outer blade body, and the base 31, the inner blade mounting base 34, and the inner blade 35 form an inner blade body.

A pressing plate 36 is provided on the outer circumference of the small diameter cylindrical portion 25d.
An insertion hole 36a provided in the center of the holding plate 36 is fitted, and a locking claw 36b protruding from the pressing plate 36 is formed in the locking recess 25 of the small-diameter cylindrical portion 25d.
is engaged with e. As a result, the holding plate 36 is fixed to the small-diameter tubular portion 25d. This holding plate 36 has
Corresponding to each roller receiving recess 28, cylindrical portions 36c open to the hemispherical portion 31a are formed at 120 ° intervals. A spring 37 and a holding pin 38 pressed by the spring 37 to the hemispherical portion 31a are arranged in the holding hole 36d of each tubular portion 36c. The spring 37 and the pressing pin 38 press the hemispherical portion 31a against the roller 29 to hold the base 31 and the outer blade 33 on the mounting wall 25 such that their center lines O can be tilted in arbitrary directions. .

The above-mentioned inner blade 35 is held by an inner blade mounting base 34 by a wire-working spring 39 so as to be able to move back and forth with respect to the outer blade 33, and the wire-working spring 39 slidably contacts the inner surface of the outer blade 33. It is movable so that it can be moved. At the center of the inner blade mount 34, a tubular portion 34a that projects toward the drive motor 27 is integrally provided, and a ball receiving portion 34b that opens into the tubular portion 34a and an inner surface of the tubular portion 34a. Open and cylindrical portion 34a
Has an engaging groove 34c extending in a direction along the center line of the.

The inner blade mounting base 34 is engaged with the output shaft 27c of the drive motor 27 through a ball joint 40 so as to be tiltable relatively in any direction. This ball joint 40 is
The connecting shaft 4 in which the output shaft 27c of the drive motor 27 is lightly press-fitted and fixed in the ball receiving portion 34b and the mounting hole 42a in the one end.
2 and a spherical body 42b provided at the other end of the connecting shaft 42 and rotatably engaged with the spherical recess 41. Further, the connecting shaft 42 is integrally provided with an engaging blade 42c that is loosely inserted in the engaging groove 34c of the cylindrical portion 34a. As a result, the inner blade mount 34 and the connecting shaft 42 are connected to each other by the connecting shaft 42 and the output shaft 27.
The inner blade mounting base 34 and the connecting shaft 42 are provided so that they can be slightly rotated relative to each other in the direction around the axis of c, and that the inner blade mounting base 34 and the connecting shaft 42 can be interlocked with each other after the engagement blade 42c abuts on the engagement groove 34c.

Next, the operation of the electric shaver having such a structure will be described.

In such a structure, the drive motor 27
Is operated to rotate the output shaft 27c, the rotation of the output shaft 27c causes the connecting shaft 42, the engaging blades 42c, and the engaging groove 3 to rotate.
After being transmitted to the inner blade mounting base 34 via 4c, the inner blade 35 is rotated integrally with the inner blade mounting base 34 in the direction around the axis of the output shaft 27c. With this rotation, when the user moves the outer blade 35 against the cheek or the like and moves it, the beard of the cheek enters inside from the outer blade 33 and is cut by the inner blade 35 and the outer blade 33.

During this movement, the drive motor 27 is fixed in the main body 20 and does not move, and only the inner blade 35 and the outer blade 33 center around the ball joint 40 in an arbitrary direction with respect to the output shaft 27c of the drive motor 27. The outer blade 33 tilts and rotates following the shape of the user's face.

[0027]

[Effect] According to such a configuration, the main body also serving as the gripping portion,
A braided and dome-shaped outer blade attached to the main body, and rotatably arranged around the center line of the outer blade and disposed in the outer blade and slidably slidably contacted with the inner surface of the outer blade. In an electric razor having a fixed inner blade and a motor whose output shaft is interlocked with the inner blade, the outer blade is held by the main body so that the center line can be tilted in any direction. The tip of the output shaft and the inner blade are connected to each other so that they can be tilted relatively in an arbitrary direction and interlocked with each other around the axis of the output shaft. Even if it is applied to a rotating structure of a relatively small shaving head in which only the blade and the inner blade are provided, the main body that supports the shaving head does not become large.

[Brief description of drawings]

1A is a sectional view taken along line AA of the electric shaver according to the present invention shown in FIG. 1B, and FIG. 1B is a schematic side view of the electric shaver having the structure of FIG.

2 (a) and 2 (b) are operation explanatory views of the electric shaver shown in FIG.

3 is an exploded perspective view of the electric razor shown in FIG. 1. FIG.

FIG. 4 is a perspective view of the holding plate and related components shown in FIGS. 1A and 3 as viewed from the back side.

FIG. 5 is a perspective view of the inner blade mount shown in FIGS. 1 (a) and 3 as viewed from the back side.

FIG. 6 is a cross-sectional view of a main part of a conventional electric shaver.

FIG. 7 is a front view of the outer blade mount of FIG.

[Explanation of symbols]

 20 ... Main body 27 ... Drive motor 27C ... Output shaft 31 ... Outer blade mounting base 33 ... Outer blade 34 ... Inner blade mounting base 35 ... Inner blade

Claims (1)

[Claims] 1. A main body also serving as a grip, an outer blade mounting base, and an outer blade body formed in a dome shape from an outer blade mounted on the outer blade mounting base and mounted on the main body, and the outer blade body. From an inner blade mount rotatably disposed in the outer blade body about the center line of the inner blade and an inner blade mounted on the inner blade mount and slidably slidably contacting the inner surface of the outer blade. In an electric razor provided with an inner blade body and a motor that is arranged and fixed in the main body and rotates an inner blade body by engaging an output shaft with the inner blade mounting base, the outer blade body has a center line. The output shaft is held by the main body so as to be tiltable in any direction, and the tip end portion of the output shaft and the inner blade body are connected so as to be relatively tiltable in any direction and interlocking with the output shaft about the axis. An electric razor characterized by being used.