JPH08323064A - Electric shaver - Google Patents

Abstract

PURPOSE: To provide an electric shaver having a smooth floating performance of a skin smoothing member and an excellent touch to the skin. CONSTITUTION: This electric shaver has a skin smoothing member 8 arranged in or near a blade head part and is come into contact with the skin to smooth it. A pair of cantilever float arms are extended so as to face each other on the side wall faces of inner cassettes 11 having blades in the upper parts along the longitudinal direction of the blade head part. The tip of each float arm is connected to the skin smoothing member 8 so as to be rotatable and slidable in the longitudinal direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric shaver, and more particularly to an electric shaver having a skin stretching member that stretches the skin and raises a beard.

[0002]

2. Description of the Related Art When shaving a beard with an electric razor, a skin stretching member that comes into contact with the skin is provided on the electric razor according to the operation of shaving the beard while stretching the skin with fingers. It is shown. In addition, when the skin stretching member is provided on the electric razor, if the skin stretching member is pressed against the skin, the skin stretching member sinks against the spring bias, that is, the skin stretching member can float freely. It is shown in the publication.

[0003]

Such a skin-stretching member stretches the skin and raises a beard by pressing in the vicinity of the part of the skin where the beard is to be shaved with an electric razor. In the one in which the skin stretching member is fixedly arranged, it is extremely difficult to keep the contact pressure of the skin stretching member on the skin constant when shaving a beard while moving the electric razor along the skin, In addition, the skin may be caught on the skin stretching member and the beard cannot be shaved smoothly.

In the case where the skin stretching member is floatable, the spring force of the spring for the float so as to keep the contact pressure between the skin stretching member and the skin constant against changes in the pressing force on the skin. However, the above-mentioned problem is reduced, but it still has the following problem. That is, in forming the float spring, when the spring is biased by the leaf spring in order to simplify the structure, when the skin stretching member floats, the connecting portion between the leaf spring and the skin stretching member is twisted and smoothed. Since no float is obtained and the float force of the skin stretching member increases, the contact pressure between the skin and the skin stretching member increases, and the skin contact may deteriorate.

The present invention is intended to solve the above problems, and an object of the present invention is to provide an electric razor having a smooth float of the skin stretching member and a good skin contact therewith.

[0006]

To achieve the above object, in the present invention, an electric shaver is provided with a skin stretching member which is disposed at or near a blade head portion and stretches the skin in contact with the skin. , A pair of cantilevered float arms are extended so as to face each other along the longitudinal direction of the blade head portion on the side wall surface of the inner cassette having a blade portion on the upper part, and the tip of each float arm is rotatable. Further, it is characterized in that it is connected to the skin stretching member so as to be slidable in the longitudinal direction.

[0007]

By connecting the tip of each cantilevered float arm to the skin stretching member so as to be rotatable and slidable in the longitudinal direction, the skin stretching member is spring-biased toward the skin and floats freely. Can be
Simplification of the float structure by forming a structure for urging the skin stretching member toward the skin on the side wall surface of the inner cassette,
The size and the number of parts can be reduced, and the blade head portion and the electric razor body can be downsized. Further, since the tips of the pair of float arms facing each other are rotatable and slidable in the longitudinal direction when connected to the skin stretching member, the connecting portion between the float arm and the skin stretching member when the skin stretching member floats. It is possible to prevent the kneading from occurring, so that the float force can be reduced, the maximum stress can be relaxed, and a smooth float can be performed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the illustrated embodiments. The electric shaver shown in FIG. 2 is arranged at the upper end of a main body 5 between a pair of blade heads 1 and 1 and both blade heads 1. Blade heads 2 are arranged in parallel and in parallel, and these three blade heads 1, 1, 2 are simultaneously driven by a motor 4. In the figure, 6 is a trimmer block, and 7 is a switch unit.

Of the blade heads 1 and 2, the blade head 1,
As shown in FIG. 3, reference numeral 1 denotes an outer blade 10 formed of a thin metal plate and having a large number of blade holes, and an outer blade 1
The inner cassette 11 holds 0 and the inner blade 12 shown in FIG. 5 that is in sliding contact with the inner surface of the outer blade 10. The inner cassette 11 has a plurality of outer blades for mounting the outer blades. The heat-sealing projections 13 are integrally provided with E-shaped elastic arms 16 on both end surfaces.

The blade head 2 has an inverted U-shaped cross section consisting of an upper wall and both side walls, and has a fixed blade 20 having a large number of slits in the upper wall, and is fixed to both ends of the fixed blade 20 in the longitudinal direction. The plate 21 includes a pair of plates 21 and 21, a movable blade 22 slidably contacting the inner surface of the upper wall of the fixed blade 20, and a drive plate 23 fixed to the movable blade 22.
Between the upper surface of the lower piece of 1 and the lower surfaces of both ends of the drive plate 23, push-up springs 24, 24 are arranged, respectively.

The blade heads 1, 1 and 2 are attached to the upper end of the main body 5 via the outer cassette 3 shown in FIG. 4 and the outer blade frame 56 to which the outer cassette 3 is detachable. The outer cassette 3 is formed in a rectangular frame shape by molding a synthetic resin, and engaging projections 16a at the tip of the elastic arm 16 of the inner cassette 11 of the blade head 1 are formed on both sides of both end faces in the longitudinal direction of the outer cassette 3. Engagement part 3 to receive
1 and 31 are provided respectively, and vertical grooves are formed in the central portions of both end faces thereof, which can be engaged with the end faces of the plate 21 of the blade head 2 and can slide up and down. Further, the outer cassette 3 is provided with hook portions 36, 36 provided with decorative buttons 39 on the outer surfaces of both ends thereof. These hook portions 36, 36
Is for detachably attaching the outer cassette 3 to the outer blade frame 56.

A pair of skin stretching members 8 are further attached to the outer cassette 3. The skin extending member 8 is a flat plate and has a plurality of thin ribs 80 protruding from the upper end surface. Each rib 80 is formed parallel to the longitudinal direction of the skin extending member 8 and is attached to the outer cassette 3. On the other hand, it is held so as to be slidable up and down, and is biased upward from the inner cassette 11.

A convex portion 18 protruding from the inner cassette 11 is provided at the lower edge of the skin stretching member 8 at the center in the longitudinal direction.
Is provided with a guide groove 88 into which is vertically slidably fitted. Guide groove 3 provided on the inner surface of the outer cassette 3
By virtue of the sliding engagement between the convex portion 18 and the guide groove 88 that are slidably engaged with each other in the vertical direction, rattling in the longitudinal direction of the skin stretching member 8 is prevented. Further, the projections 17 projecting from both upper ends of the side wall surface of the inner cassette 11 toward the skin extending member 8 side, the skin extending member 8 collapses toward the inner cassette 11 side due to the contact pressure between the skin and the skin extending, and the skin is extended. To prevent the member 8 from touching the outer blade 10 and deforming the outer blade 10, the outer blade 1
The distance between 0 and the skin stretching member 8 is maintained.

Here, the skin extending member 8 has a lower portion as a rigid portion 8a made of a member having a small friction coefficient such as synthetic resin or metal, and an upper portion as an elastic member portion 8b made of a material having elasticity such as rubber. Each of the ribs 80 is formed integrally with the elastic material portion 8b having a large coefficient of friction to have elasticity. In order to obtain the skin stretching function, it is necessary to form the skin stretching member 8 having a required friction coefficient, but the portion supported by the inner cassette 11 and the outer cassette 3 so as to be vertically slidable has a friction coefficient. Because of the small rigid portion 8a,
The skin stretching member 8 can be smoothly moved up and down.

The skin stretching member 8 is the blade head 1 as described above.
If the blade head 1 and the skin extending member 8 are pressed against the skin, the float force of the skin extending member 8, that is, the float force of the skin extending member 8, is first set. The sum of the spring constants of the pair of float arms 89 is smaller than the float force of the blade head 1, that is, the spring constant of the combined force of the push-up spring 19 pushing up the inner blade 12 and the elastic arm 16. By the way, the float force of the blade head 2 is also smaller than the float force of the blade head 1.

Therefore, when the blade heads 1, 2, 1 of this reciprocating electric razor are pressed against the skin to shave, the skin extending members 8, 8 located in the vicinity of the blade heads 1, 1 also contact the skin at the same time. In addition, the contact pressure between the skin stretching member 8 and the skin is appropriately set by the spring force of the float arm 89, and the skin stretching member 8 that contacts the skin in this manner presses the skin. By this, the skin is stretched to raise a beard, and the efficiency of beard introduction to the blade heads 1 and 2 is improved.

When shaving, the blade heads 1 and 2 are used.
Also, the electric shaver is moved in a direction orthogonal to the longitudinal direction of the skin stretching member 8, but since the contact portion of the skin stretching member 8 with the skin is composed of a plurality of thin and flexible ribs 80. The skin stretching member 8 surely contacts the skin over its entire length in the longitudinal direction, and since it can be floated freely, the skin stretching member 8 is surely stretched.

On the other hand, an eccentric shaft and a pair of driver elements 41, 42 for converting the rotation of the eccentric shaft into reciprocating motion are connected to the output shaft of the motor 4 arranged in the main body 5 side, and the main body is connected. As shown in FIG. 5, the inner blades 12 and 12 of the blade heads 1 and 1 are connected to the driver elements 41 and 42 whose upper portions project from the upper surface of the blade 5, respectively. At this time, the driver elements 41, 42 and the inner blades 12, 1
As shown in FIG. 1, push-up springs 19 and 19 for urging the inner blade 12 upward are disposed between the two. Further, the sub driver 43 is attached to the one driver 41.
The auxiliary driver 43 engages with the drive plate 23 of the blade head 2 and transmits the movement of the driver 41 to the drive plate 23.

Therefore, two kinds of three blade heads 1, 2, 1
In this reciprocating electric shaver in which the skin stretching members 8, 8 are arranged outside the blade heads 1, 1 in parallel and in parallel, if the motor 4 is driven, the rotation of the motor 4 is driven. The inner blades 12, 12 of the blade heads 1, 1 are reciprocally driven by the reciprocating motions of the blade heads 1, 1 by the reciprocating motions 41, 42, and the blade heads 2 are driven by the auxiliary driving elements 43.
The movable blade 22 of is also reciprocally driven, and when these blade heads 1, 2, 1 are pressed against the skin, the blade head 1
Floats when the elastic arm 16 of the inner cassette 11 bends, and the blade head 2 floats when the elastic spring 32 of the outer cassette 3 bends. Furthermore, each skin stretching member 8 is also a float arm 8 arranged in the inner cassette 11.
Float as 9 bends.

The float arm 89 is formed as a pair of cantilever beams facing each other, which are composed of thin elastic pieces integrally formed with the inner cassette 11. At this time, since the float arm 89 is formed in the side wall surface of the inner cassette 11, the float arm 89 can be made compact, and the number of parts can be reduced because a separate part such as a coil spring is not used.

The float arm 89 is connected to the skin stretching member 8 through the through hole 8 formed in the skin stretching member 8.
The boss 8 is attached to the tip of the float arm 89 so as to engage with 1.
2 is provided in a protruding manner, and after the through hole 81 and the boss 82 are engaged with each other, heat sealing is performed, so that the connection between the inner cassette 11 and the skin stretching member 8 is made more reliable. As shown in FIGS. 10 and 11, in the float arm 89, when the skin stretching member 8 floats, the boss 82 at the tip of the float arm 89 moves in an arc around the root 89a of the float arm 89. The boss 82 moves in the longitudinal direction of the blade head 1 and causes a rotational movement.

Due to these actions, if the boss 82 and the skin stretching member 8 are firmly fixedly connected, problems such as an increase in the float force and an increase in the maximum stress of the float arm 89 will occur, resulting in a smooth float. Cannot be realized. Therefore, as shown in FIG. 6, the through hole 81 provided in the skin stretching member 8 is largely penetrated in the longitudinal direction so that the boss 82 can move in the longitudinal direction of the blade head 1, and the boss 82
In order to make the boss rotatable, as shown in FIG. 10, the upper and lower ends of the boss 82 are arcuate. From this,
The boss 82 can smoothly float without being twisted at the time of float, and the skin stretching member 8 does not increase the float force, so that the skin contact is good.

As shown in FIG. 3, the skin extending member 8 has a pair of bosses 83 projecting from the side wall surface of the skin extending member 8.
The inner cassette 11 has a pair of bosses 84a and 84b protrudingly provided at positions where the bosses 83 are engaged with each other in the vertical direction.
The upper limit of the float at both longitudinal ends of the skin stretching member 8 can be determined by the engagement between the boss 84 and the boss 84.
By engaging b with the boss 83, it is possible to determine the lower limit portions of the floats at both ends in the longitudinal direction of the skin stretching member 8.

With the above operation, the inclination of the skin stretching member 8 in the longitudinal direction is controlled so that it does not tilt more than necessary.
The maximum stress of the float arm 89 can be relaxed. As shown in FIG. 9, when connecting to the skin stretching member 8, the float arm tip portion 82 is attached to the side wall surface of the inner cassette 11.
By mounting the inner cassette 11 in a state in which the blade head 1 is flexed by the amount of flexure C, the inner blade inside the blade head 1 is detached from the main body 5 or attached when cleaning or replacing the blade head 1. It is possible to prevent the inner blade 12 and the float arm 89 from interfering with each other by moving the upper and lower parts 12 and to prevent the float arm 89 from being damaged by the interference.

The skin stretching member 8 is pulled toward the inner cassette 11 side by the reaction force due to the flexure of the flexure amount C of the float arm 89, and is brought into contact with the skin stretching member 8 to rattle the skin stretching member 8 in the lateral direction of the blade head 1. Can be prevented, and vibration and noise can be reduced. The flexure amount C is 0.
It is preferably 1 mm or more and less than 1.0 mm. As shown in FIG. 6, when the inner cassette 11 and the skin stretching member 8 are connected to each other, the float arm 89 is on the side wall surface of the skin stretching member 8 and is covered so that a cleaning brush for cleaning the blade head 11 is provided. It is possible to prevent the float arm 89 from being damaged by being caught on the float arm 89.

[0026]

INDUSTRIAL APPLICABILITY The present invention relates to an electric razor provided with a skin stretching member which is disposed at or near the blade head portion and stretches the skin by contact with the skin. A pair of cantilevered float arms are extended so as to face each other along the longitudinal direction of the blade head portion, and the tip of each float arm is connected to the skin stretching member so as to be rotatable and slidable in the longitudinal direction. Therefore, each cantilevered float arm can bias the skin stretching member toward the skin with a spring and make it freely floatable, and the connecting portion between the tip of the float arm and the skin stretching member is The maximum stress of the float arm is relaxed without twisting, and it is possible to improve the skin contact while preventing the increase of the float spring constant. Also,
By adopting the cantilevered float arm, it is possible to reduce the number of parts, simplify the float structure, and downsize the blade block and electric razor body.

[Brief description of drawings]

FIG. 1 is a partial vertical sectional view of an embodiment of the present invention.

FIG. 2 is a vertical sectional view of the above.

FIG. 3 is an exploded perspective view of the above blade head portion and a skin stretching member.

FIG. 4 is an exploded perspective view of the outer cassette and the outer blade frame of the same.

FIG. 5 is an exploded perspective view of the same driver and inner blade.

FIG. 6 is a partially omitted front view showing a state in which the blade head and the skin stretching member are attached to the outer cassette.

FIG. 7 is a partial vertical cross-sectional view showing a state at the time of float of the above.

FIG. 8 is a vertical cross-sectional view showing a state in which a skin stretching member is attached to the inner cassette of the above.

FIG. 9 is a partially enlarged sectional view of the above.

FIG. 10 (a) is a partially omitted front view showing the behavior of the float arm at the time of float, and FIG. 10 (b) is an enlarged front view showing a boss.

FIG. 11 is a partially omitted front view showing a connection state of the arm tip with the skin stretching member when the skin stretching member is floated to the lowest point.

[Explanation of symbols]

 8 Skin Extending Member 11 Internal Cassette 89 Float Arm

Claims (1)

[Claims] 1. An electric razor having a skin stretching member which is disposed at or near the blade head portion and stretches the skin by contact with the skin, wherein the blade head portion is provided on the side wall surface of the inner cassette having the blade portion at the upper portion. Characterized in that a pair of cantilevered float arms are extended so as to face each other along the longitudinal direction, and the tip of each float arm is connected to the skin stretching member so as to be rotatable and slidable in the longitudinal direction. And an electric razor.