JPH07222881A - Electric razor - Google Patents

Abstract

PURPOSE:To let both an increase in a closely touching range for skin to a cutting edge and good skin touch feeling be satisfied. CONSTITUTION:Elastic arms 20 and 70 acting as a float elasticity means A are provided for the side wall 13a of an inner cassette 13 and the side wall 12a of an outer cassette 12, and the inner and outer cassettes 13 and 12 are connected to each other via both the elastic arms 20 and 70. A fulcrum position at the one end side of the elastic arm 70 in the inner cassette 13 and a fulcrum position at the one end side of the elastic arm 20 in an outer cassette body 100 are disposed at opposite positions at both of sides in the direction D perpendicularly intersected with the settling direction C of the inner cassette 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reciprocating type, a rotary type electric shaver.

[0002]

2. Description of the Related Art Conventionally, an outer blade head 3 having an outer blade 11 (net blade) and an inner cassette 13 for holding it,
As an electric razor having an inner blade (not shown) that is reciprocally moved by being pressed against the outer blade 11 by an inner blade pushing spring (not shown), for example, as shown in FIG. 12, the inner cassette 13 is an outer cassette. The E-shaped arm 40 is attached to the connecting portion 16 of the E-shaped arm 40, and the E-shaped arm 40 elastically supports the inner cassette 13 so as to float freely with respect to the outer cassette 12. In FIG. 12, 15 is an outer blade frame, 30 is a slide handle, and 31 is a slide plate. Further, since the inner blade is pushed up by the inner blade pushing-up spring (not shown), as shown in FIG. 13, the float force C of the outer blade 11 (the force that lowers the outer blade 11 downward) is It is the resultant force of the spring force C ₁ and the float force C ₂ by the E-shaped arm 40 of the outer cassette 12.

[0003]

However, in the conventional connecting and supporting structure for the inner cassette 13 and the outer cassette 12 by the E-shaped arm 40, the E-shaped arm 40 has a short length. The float force C ₂ by the character arm 40 is increased. Therefore, the float force C of the outer blade 11
Is large, and there is a problem that the skin contact (smoothness) deteriorates. Moreover, since the float force C of the outer blade 11 becomes large, as shown in FIG. 14, when the outer blade 11 is pressed against the skin H to be used, the float amount h ₁ (outer blade (The amount by which 11 lowers downward) becomes smaller, and the angle θ ₁ between the outer blade 11 and the tangent line connecting the outer blades 11 and the original tangent line becomes smaller. As a result, the skin H that adheres closely to the outer blade 11
Has a problem that the outer blade 11 follows the skin only at a narrow angle θ ₁ .

The present invention has been made in view of the above conventional problems, and an object of the present invention is to reduce the float force of the outer blade and increase the range of skin contact with the outer blade in use. And there is to provide an electric razor that can satisfy both the goodness of the skin.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 relates to an inner cassette 13 having an outer blade 11 stretched thereon, and an outer cassette body 100 for supporting the inner cassette 13 in a freely floatable manner. And a side wall 1 of the inner cassette 13
3a and the side wall of the outer cassette body 100 are respectively provided with float elastic means A, and the inner cassette 13 and the outer cassette body 100 are connected to each other via both float elastic means A.

In the float elastic means A, one end 20a (70a) of the elastic leg portion 20b (70b) has the side wall 1 formed therein.
2a (13a) is supported in a cantilever manner, and the other end of the elastic leg portion 20b is separated from the side wall 12a (13a) at one end 20.
Bend toward the a side, and connect the connecting portion 16 to the tip of this bent portion.
(14) is provided on the elastic arm 20 (70), and one end 70 of the elastic arm 70 in the inner cassette 13 is formed.
The fulcrum position on the a side and the fulcrum position on the one end 20a side of the elastic arm 20 in the outer cassette body 100 correspond to the inner cassette 13
It is preferable that they are arranged at opposite positions on both sides in a direction D orthogonal to the subduction direction C of.

Further, the invention according to claim 3 is provided with an inner cassette 13 in which an outer blade 11 is stretched, and an outer cassette body 100 for connecting and supporting the inner cassette 13 via a float elastic means A so as to be floatable. The float elastic means A is characterized by including an elastic body B that applies an elastic force to the inner cassette 13 in the sinking direction C thereof. Here, the elastic body B preferably comprises a leaf spring 80 or a coil spring 90.

[0008]

According to the first aspect of the invention, the float elastic means A is provided on each of the side wall 13a of the inner cassette 13 and the side wall of the outer cassette body 100, and the inner cassette 13 is connected via both float elastic means A. And outer cassette body 10
Since 0 and 0 are connected to each other, the inner cassette 13
And two float elastic means A between the outer cassette body 100 and the outer cassette body 100.
Therefore, the float force is halved as compared with the case where the float elastic means A is provided only on one of the inner cassette 13 and the outer cassette body 100. Therefore, the outer blade 11
The float force of is reduced and the skin contact (smoothness) is improved. Moreover, since the float force of the outer blade 11 is halved, when the outer blade 11 is pressed against the skin H to be used, the float amount h ₁ with respect to the pressing force of the outer blade 11 is doubled, and the outer blade 11 touches the skin. It becomes easier to follow.

Further, according to the third aspect of the invention, the float elastic means A is provided with the elastic body B for applying an elastic force to the inner cassette 13 in the direction C of sinking the elastic body B. The downward load is caused by the float elastic means A.
In addition, the float force of the outer blade 11 can be further reduced.

[0010]

The present invention will be described below in detail with reference to the illustrated embodiments. As shown in FIG. 3, the electric shaver 1 used in the present embodiment has a motor 7, a battery unit 5, a switch unit 6 and the like housed in a housing 7 of a main body 2, and an output shaft of the motor 4 is An eccentric shaft (not shown) and a pair of driver elements 8, 8 for converting the rotation of the eccentric shaft into reciprocating motion are connected to each other. The inner blades 9, 9 are connected. The inner blade 9 has a driver 8
A push-up force is constantly applied by the inner blade push-up spring 10 formed of a compression coil spring, and the inner blade 9 is always biased upward by the inner blade push-up spring 10.

On the other hand, each outer blade head 3 includes an outer blade 11 in which a net blade in the form of a thin metal plate is bent into a semicylindrical shape and stretched and held by an inner cassette 13, and an inner cassette 13 which holds the outer blade 11. It is composed of. As shown in FIG. 1, the inner cassette 13 is provided with elastic arms 70 formed of molded products on both side walls 13a in the length direction. Further, the outer cassette 12 to which the inner cassette 13 is attached is formed in a rectangular frame shape by molding a synthetic resin, and elastic arms 20 made of a molded product are provided on both side walls 12a in the length direction thereof. And the inner cassette 13 is the outer cassette 1.
The inner cassette 13 is accommodated in the outer cassette 12 through the lower opening of the inner cassette 13, and the connecting portion 14 of the elastic arm 70 of the inner cassette 13 engages with the connecting portion 16 of the elastic arm 70 of the outer cassette 12, thereby causing the inner cassette 13 to move. It is detachably attached to 12.

Here, the elastic arm 70 of the inner cassette 13
2, one end 70a of the elastic leg portion 70b is cantilevered on one side of the side wall 13a of the inner cassette 13, and the other end of the elastic leg portion 70b is one end 70a from a position away from the side wall 13a. The bent portion 70c is bent toward the side, and the mounting portion 70d provided with the connecting portion 14 is connected to the tip of the bent portion 70b. On the other hand, the outer cassette 12
In the elastic arm 20, the one end 20a of the elastic leg portion 20b is cantilevered on one side of the side wall 12a of the outer cassette 12,
The other end of the elastic leg portion 20b is a bent portion 20c that is bent from a position away from the side wall 12a toward the one end 20a side, and a mounting portion 20d including a connecting portion 14 is formed at the tip of the bent portion 20c. Has been done. The fulcrum position on the one end 70a side of the elastic arm 70 in the inner cassette 13 and the fulcrum position on the one end 20a side of the elastic arm 20 in the outer cassette 12 are on both sides in the direction D orthogonal to the sinking direction C of the inner cassette 13. They are located opposite each other.

A slide handle 30 shown in FIG. 1 is provided on the outer surface of the side wall 12a of the outer cassette 12,
A slide plate 31 is arranged on the inner surface side of the slide handle 30, and the slide handle 30 and the slide plate 31 slide a hook 32 provided on the slide handle 30 through a long hole 33 provided in the outer cassette 12. By engaging with the plate 31, it is slidably attached to the outer cassette 12. Hook portions 36, 36 to which decorative buttons 35 are attached are provided on both outer surfaces of the outer cassette 12, and the outer cassette 12 is detachably attached to the outer blade frame 15 by the hook portions 36, 36. The outer blade frame 15 and the outer cassette 12
The outer cassette body 100 is constituted by and.

Therefore, when the motor 4 is driven by the switch section 6 shown in FIG.
It is converted into reciprocating motion by 8, and the reciprocating motion reciprocally drives the inner blade 9 while slidingly contacting the inner surface of the outer blade 11, and the outer blade 11 is pressed against the skin H in this state. First, in the stage without the float, both elastic arms 20 and 70 are deformed upward, so a negative float force is generated in the elastic arms 20 and 70, and the pushing force C of the inner blade pushing spring 10 shown in FIG. 6 is generated. Only ₁ acts on the inner blade 9.

Next, when pressing the outer cutter 11 to the skin H, the outer blade 11 acts a positive float force C ₂ by the two resilient arms 20 and 70 (force the outer blade 11 falls down), the outer The blade head 3 includes an inner blade push-up spring 10 and both elastic arms 20, 7.
A float force C of 0 is generated. The float force C of the outer blade head 3 at this time is the resultant force of the push force C ₁ of the inner blade pushing spring and the float force C ₂ of the elastic arms 20 and 70, but the float force of the elastic arms 20 and 70 is the same as in the conventional case. In comparison with the case where the elastic arm is provided only in the outer cassette, it is halved. Therefore, as shown in FIG. 5, when the outer blade 11 is pressed against the skin H for use, good contact with the skin (smoothness) can be obtained, and at the same time, the amount h ₂ (of the outer blade head 3 that can be floated). Since the amount by which the outer blade 11 is lowered downward is larger than the conventional float amount (h _{1 in} FIG. 14) and the follow-up angle θ ₂ to the skin H is also larger than the conventional (θ _{1 in} FIG. 14), the outer blade is The contact range of the skin H with respect to 11 can be increased, and the followability to the skin H can be increased.

Moreover, the fulcrum position of the elastic arm 70 on the one end 70a side of the inner cassette 13 and the fulcrum position of the elastic arm 20 on the one end 20a side of the outer cassette body 12 are:
Since the inner cassette 13 is arranged at the opposite position to the direction D orthogonal to the sinking direction C, each elastic arm 2
The balance of the float force due to 0, 70 is improved, and the float force acts vertically on the outer blade 11 to move the outer blade 11 right below. Moreover, both elastic arms 20, 7
The distance from the fulcrum position of 0 to the connecting portions 14 and 16 is doubled, and the float amount of the outer blade 11 can be increased, and at the same time, two Es are provided even in a narrow area between the inner cassette 13 and the outer cassette body 12. Since the character-shaped elastic arms 20 and 70 can be compactly housed and arranged, there is an advantage that the outer blade head 3 can be prevented from becoming large.

As another embodiment of the present invention, as shown in FIGS. 7 to 9, an elastic body B which applies an elastic force to the float elastic means A in the direction C in which the inner cassette 13 is depressed. May be provided. First, in FIGS. 7 and 8, the elastic body B is composed of a pair of leaf springs 80 and 80 ', and the leaf springs 80 and 80' apply downward load to the elastic arms 20 and 70 which are the float elastic means A. As a result, the float force of the outer blade 11 is further reduced. The leaf springs 80 and 80 'have a bilaterally symmetrical structure, and are attached to the elastic arms 20 and 70 by attaching portions 80c (80
c '), an arm portion 80b (80b') extending upward from the mounting portion 80c, and an outer cassette fitting portion 80a (80a ') provided at the tip of the arm portion 80b. whole leaf springs 80 by attaching portion 80c is pressed downward by the elastic force is spring biased downward, resulting in, as shown in FIG. 10, it takes a load C ₃ of the downward orientation to the resilient arms 20, 70 As a result, the float force C of the outer blade 11 is reduced, and good contact with the skin (smoothness) and followability to the skin can be improved.

Further, in FIG. 9, the elastic body B comprises a pair of coil springs 90 and 90 '.
One end 90a (90a ') of 0, 90' is the outer cassette 12
And the other end 90b (90b ') is attached to the elastic arm 2.
As shown in FIG. 11, a downward pulling load C ₅ is applied to the elastic arms 20 and 70 by attaching to the 0 and 70, respectively, and the float force of the outer blade 11 is reduced to give a smooth contact with the skin. The goodness and the ability to follow the skin can be improved respectively.

In each of the above embodiments, the outer cassette body 1
Although 00 is configured by separate components that are detachable between the outer cassette 12 and the outer blade frame 12, the present invention is not limited to this, and the outer cassette 12 and the outer blade frame 12 may be integrated. Further, the float elastic means A may be provided not on the outer cassette 12 but on the outer blade frame 15.
Furthermore, the number of outer blade heads 3 is not limited to two, and may be one or three or more.

[0020]

As described above, according to the first aspect of the invention, the inner cassette having the outer blade stretched and the outer cassette body for supporting the inner cassette in a freely floatable manner are provided. Since the float elastic means is provided on the side wall of the outer cassette body and the inner cassette and the outer cassette body are connected to each other through both float elastic means, the float force of the outer blade is reduced to half that of the conventional one. The float force of the outer blade becomes smaller and the skin contact (smoothness) becomes better, and when the outer blade is pressed against the skin, the float amount doubles against the pressing force of the outer blade and the outer blade follows the skin. As a result, there is an effect that both the increase in the contact area of the skin with the outer blade in use and the goodness of contact with the skin can be satisfied.

According to the second aspect of the present invention, in the float elastic means, one end of the elastic leg portion is supported in a cantilever manner on the side wall, and the other end of the elastic leg portion is on the one end side at a position apart from the side wall. It is made up of an elastic arm that is bent toward the end and the connecting portion is provided at the tip of this bent portion. Since the cassettes are placed at opposite positions on both sides in the direction orthogonal to the sinking direction of the cassette, the balance of the float force by each elastic arm is improved, and the float force acts vertically on the outer blade to move the outer blade directly below. Can be made. Therefore, the contact with the skin (feeling of smoothness) is further improved.

According to the third aspect of the present invention, there is provided an inner cassette having an outer blade stretched thereon, and an outer cassette body for connecting and supporting the inner cassette via float elastic means so that the inner cassette can be floated freely. Since the means has an elastic body that applies an elastic force to the inner cassette in the direction of its sinking, a downward load is applied to the float elastic means by the elastic body, and the float force of the outer blade is further reduced. Can be made. Therefore, the float force of the outer blade is reduced by the elastic body, the skin contact (smoothness) can be further improved, and the followability to the skin can be further improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention.

FIG. 2 is an exploded side view of the same inner cassette and outer cassette.

FIG. 3 is a side sectional view of the above electric shaver.

FIG. 4 is an exploded perspective view of a main part of the electric shaver.

FIG. 5 is a cross-sectional view showing a close contact state between the outer blade and the skin of the same.

FIG. 6 is a graph showing a relationship between a float amount and a float force of the above.

FIG. 7 is a side view of another embodiment of the present invention.

8A and 8B are perspective views of the leaf spring of the same.

9 is a side view showing a modified example of FIG. 7. FIG.

10 is a graph showing the relationship between the float amount and the float force shown in FIG.

11 is a graph showing the relationship between the float amount and the float force shown in FIG.

FIG. 12 is a conventional exploded perspective view.

FIG. 13 is a graph showing the relationship between the conventional float amount and float force.

FIG. 14 is a cross-sectional view showing a state of close contact between a conventional outer blade and skin.

[Explanation of symbols]

 11 Outer Blade 12a Side Wall 13 Inner Cassette 13a Side Wall 14, 16 Connection Part 80 Leaf Spring 90 Coil Spring 100 Outer Cassette Body A Float Elastic Means B Elastic Body C Depression Direction D Orthogonal Direction

Claims (5)

[Claims] 1. An inner cassette having an outer blade stretched, and an outer cassette body for supporting the inner cassette in a freely floatable manner. Float elastic means are provided on the side wall of the inner cassette and the side wall of the outer cassette body, respectively. An electric razor characterized in that an inner cassette and an outer cassette body are connected to each other via a float elastic means. 2. The float elastic means has one end of the elastic leg portion supported in a cantilever manner on the side wall, and the other end of the elastic leg portion is bent toward the one end side at a position apart from the side wall, A direction in which a fulcrum position on one end side of the elastic arm in the inner cassette and a fulcrum position on one end side of the elastic arm in the outer cassette body are orthogonal to the sinking direction of the inner cassette. The electric shaver according to claim 1, wherein the electric razor is arranged at opposite positions on both sides of the electric shaver. 3. An inner cassette having an outer blade stretched, and an outer cassette body for connecting and supporting the inner cassette via float elastic means so that the inner cassette can be freely floated. The float elastic means comprises:
An electric razor, comprising an elastic body that applies an elastic force to the inner cassette in the direction of depression thereof. 4. The electric razor according to claim 3, wherein the elastic body is a leaf spring. 5. The electric shaver according to claim 3, wherein the elastic body comprises a coil spring.