JP2013063232A - Electric razor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric razor that can adjust the pressure of an outer blade to a skin surface and the pressure of a rotating body.SOLUTION: The electric razor 1 includes: an outer blade cassette 25 for supporting the outer blade 15 in contact with the skin surface 41; a roller support bracket 33 for supporting a rotation support shaft 35 of a roller 31 which rotates while contacting the skin surface 41; and a connection mechanism 50 which is rotatably supported and connects the outer blade cassette 25 to the roller support bracket 33.

Description

  The present invention relates to an electric razor.

  Various proposals for electric shavers that reduce the frictional force between the outer blade and the skin surface (the frictional force exerted by the outer blade surface on the skin surface) when the outer blade is moved against the skin surface. Has been made.

  For example, an electric razor including a rotating body that rotates in an orthogonal direction orthogonal to the extending direction of the outer blade while contacting the skin surface is known (see, for example, Patent Document 1). This rotating body protrudes to the skin surface side from the outer blade and is supported by a spring (elastic body). Thereby, since a rotary body is pressed on the skin surface with a spring and rotates, the frictional force between an outer blade and the skin surface can be reduced.

JP 2009-232894 A (2nd to 3rd pages, FIGS. 1 and 2)

  However, in the conventional electric shaver described above, the rotating body is supported in an independent state with respect to the outer blade. For this reason, when the pressure of the outer blade against the unevenness of the skin surface and the pressure of the rotating body are different, the frictional force between the outer blade and the skin surface increases, and the body hair is shaved too short, or the outer blade and the skin surface As a result, the frictional force is lowered and the body hair cannot be shaved shortly.

  Then, an object of this invention is to provide the electric shaver which can adjust the pressure of the outer blade with respect to the skin surface, and the pressure of a rotary body.

  In order to solve the above-described problems, the present invention has the following features. First, the first feature of the present invention is that an outer blade support portion that supports an outer blade that contacts the skin surface, and a rotation shaft support portion that supports a rotation shaft of a rotating body that rotates while contacting the skin surface. It is an electric razor provided, and is further characterized by further comprising a connecting mechanism for connecting the outer blade support portion and the rotary shaft support portion and moving the outer blade and the rotating body along opposite directions. .

  According to this feature, the connection mechanism connects the outer blade support portion and the rotary shaft support portion, and moves the outer blade and the rotating body along opposite directions. Thereby, even when the pressure of the outer blade against the unevenness of the skin surface and the pressure of the rotating body are different, the pressure of the outer blade and the pressure of the rotating body against the skin surface are adjusted, and the pressure and rotation of the outer blade are adjusted. The body pressure is even. Therefore, it is possible to prevent the frictional force between the outer blade and the skin surface from becoming high or low, and to prevent the phenomenon that the body hair is shaved too short, or conversely the body hair cannot be shaved shortly.

  A second feature of the present invention relates to the first feature of the present invention, wherein the coupling mechanism is formed by a link member made of a rigid body and rotates between the outer blade support portion and the rotary shaft support portion. The gist is to do.

  According to this feature, the connection mechanism is formed by a link member made of a rigid body, and rotates between the outer blade support portion and the rotary shaft support portion. Thereby, it becomes difficult to cause loss in transmission between the outer blade support portion and the rotary shaft support portion by the coupling mechanism, and it becomes easy to adjust the pressure of the outer blade and the pressure of the rotating body. For this reason, the frictional force between the outer blade and the skin surface can be maintained optimally, and the phenomenon that the body hair is shaved too short or the body hair cannot be shaved shortly can be more reliably prevented.

  A third feature of the present invention relates to the first or second feature of the present invention, wherein the coupling mechanism is fixed to the outer blade side fixing portion fixed to the outer blade support portion and the rotary shaft support portion. And a rotation support portion that rotatably supports the coupling mechanism, and the rotation support portion is provided at a central position between the outer blade side fixing portion and the shaft side fixing portion. The main point is that

  According to this feature, the rotation support portion is provided at the center position between the outer blade side fixing portion and the shaft side fixing portion. Thereby, when the rotational moment centering on the rotation center axis | shaft of a connection mechanism is negated, the pressure of an outer blade and the pressure of a rotary body can be equalized reliably. For this reason, it can prevent more reliably that the frictional force of an outer blade and the skin surface becomes too high and becomes too low.

  A fourth feature of the present invention relates to the first to third features of the present invention, wherein the connection mechanism includes the rotation support portion with respect to an orthogonal direction orthogonal to the axial direction of the rotation support portion. A plurality of fitting portions to be fitted are formed, and the rotation center axis of the coupling mechanism is fitted to any of the plurality of fitting portions.

  According to this feature, the rotation center axis of the coupling mechanism is fitted into any of the plurality of fitting portions. That is, the rotation center axis of the coupling mechanism can be varied, and the pressure of the outer blade and the pressure of the rotating body can be changed according to the user's preference. That is, by increasing the pressure of the outer blade, the hair can be shaved short. On the other hand, by increasing the pressure of the rotating body, skin can be prevented from entering a hole formed in the outer blade, and skin protection can be realized.

  According to the characteristics of the present invention, it is possible to provide an electric razor that can adjust the pressure of the outer blade against the skin surface and the pressure of the rotating body.

It is sectional drawing of the blade unit 17 of the electric shaver 1 which concerns on 1st Embodiment. It is sectional drawing which shows operation | movement of the roller 31 which concerns on 1st Embodiment. It is sectional drawing of the blade unit 17 of the electric shaver 1 which concerns on 2nd Embodiment. It is sectional drawing of the blade unit 17 of the electric shaver 1 which concerns on 3rd Embodiment.

  Next, an embodiment of an electric shaver according to the present invention will be described with reference to the drawings. Specifically, (1) the first embodiment, (2) the second embodiment, (3) the third embodiment, and (4) other embodiments will be described.

  In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones.

  Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, the part from which the relationship and ratio of a mutual dimension differ also in between drawings may be contained.

(1) 1st Embodiment (Whole structure of an electric shaver)
First, the configuration of the electric shaver 1 according to the first embodiment will be described with reference to the drawings. FIG. 1 is a cross-sectional view of the blade unit 17 of the electric razor 1 according to the first embodiment.

  As shown in FIG. 1, the electric razor 1 includes a head portion 3 connected to the distal end side of a grip portion 2 held by a user, and the head portion 3 is provided with a blade head housing 7.

  The blade head housing 7 includes an outer cover 9 and a central boss portion 11 as a rotating shaft support portion located inside the outer cover 9. Two regions between the outer cover 9 and the central boss portion 11 are provided with a pair of blade units 17 each having an inner blade 13 and an outer blade 15 that is located outside and contacts the skin surface 41. ing.

  The lower end of the inner blade 13 is supported by the inner blade cassette 14, and the lower portion of the inner blade cassette 14 is connected via a connecting rod 21 to a drive shaft 19 connected to a vibration source (not shown) having a motor and the like. The

  In addition, a spring 23 that presses the inner blade 13 against the inner surface of the outer blade 15 is interposed between the inner blade 13 and the drive shaft 19. The spring 23 urges the inner blade cassette 14 upward with respect to the connecting rod 21. Thereby, the inner blade 13 is pressed against the inner surface of the outer blade 15 by the spring 23, and the extending direction of the outer blade 15 via the drive shaft 19, the connecting rod 21 and the inner blade cassette 14 by a vibration source (not shown). Vibrates in the depth direction of the drawing.

  The outer blade 15 is formed in a net shape having an infinite number of holes having a diameter of about several hundred μm. The inner blade 13 described above is disposed inside the outer blade 15. That is, when the inner blade 13 moves relative to the outer blade 15 (reciprocating in the extending direction of the outer blade 15), the inner blade 13 and the outer blade 15 cooperate to cut the body hair 39. .

  The outer blade 15 is formed in a U-shaped cross section, and is held by an outer blade cassette 25 as an outer blade support portion that supports the outer blade 15. The outer blade cassette 25 has a shape inward of the entire inner blade 13, and the lower end of the outer blade cassette 25 is an outer blade cassette base 43. Further, a locking projection 26 is provided on the outer side of the end portion of the outer blade cassette 25, and the locking projection 26 is a locking portion 27 provided on the inner surface of the outer cover 9 and the side surface of the central boss portion 11, respectively. 29 is locked. Thereby, the outer blade cassette 25 holding the outer blade 15 is prevented from coming off upward.

  The central boss portion 11 is fixed to the bottom plate 7 a of the blade head housing 7, and a roller 31 as a rotating body that rotates while contacting the skin surface 41 is provided at the tip of the central boss portion 11. The tip of the roller 31 protrudes closer to the skin surface 41 than the tip of the outer blade 15. The roller 31 is rotatably attached to a rotation support shaft 35 that is fixed to the tip of a roller support bracket 33 as a rotation shaft support portion.

  The roller support bracket 33 is inserted into a space 11 a formed in the central boss portion 11 so as to be movable on the proximal end side, and the distal end side protrudes outside from an opening portion 11 b formed at the distal end of the central boss portion 11. . The roller support bracket 33 includes a large-diameter portion 33a in the space 11a, and the large-diameter portion 33a is caught by the opening 11b, so that the roller 31 is prevented from coming off.

  Here, the roller support bracket 33 and the outer blade cassette base 43 are connected via a connecting mechanism 50. The coupling mechanism 50 moves the outer blade 15 and the roller 31 along opposite vertical directions. The coupling mechanism 50 is rotatably fixed to a bottom plate protrusion 7b provided in the blade unit 17 protruding upward from the bottom plate 7a of the blade head housing 7. Further, the coupling mechanism 50 is formed by a plate-like link member made of a rigid body, and is rotatable between the roller support bracket 33 and the outer blade cassette base 43.

  Specifically, the coupling mechanism 50 is fixed to the outer blade side fixing portion 51 fixed to the outer blade cassette base portion 43, the shaft side fixing portion 52 fixed to the roller support bracket 33, and the bottom plate protrusion portion 7b. A rotation support portion 53 as a rotation center axis that rotatably supports the coupling mechanism 50 is provided.

  In the present embodiment, the rotation support portion 53 is provided at a position closer to the shaft side fixing portion 52 than the outer blade side fixing portion 51. That is, the distance A from the rotation support portion 53 to the outer blade side fixing portion 51 is longer than the distance B from the rotation support portion 53 to the shaft side fixing portion 52.

(Movement of coupling mechanism)
Next, the movement of the coupling mechanism 50 described above will be described with reference to the drawings. 2A is a cross-sectional view showing the moment when the roller 31 comes into contact with the skin surface 41, and FIG. 2B is a cross-sectional view showing a state where the roller 31 has moved downward.

  As shown in FIG. 2A, when the roller 31 is pressed vertically against the uneven skin surface 41, there is a difference between the pressure 60a of the outer blade 15 against the skin surface 41 and the pressure 60b of the roller 31 (60a> 60b). ).

  As shown in FIG. 2B, when there is a difference between the pressure 60 a of the outer blade 15 and the pressure 60 b of the roller 31, the rotational moment 60 c around the rotation support portion 53 of the coupling mechanism 50 is Be countered. For this reason, the pressure 60a of the outer blade 15 and the pressure 60b of the roller 31 against the skin surface 41 are adjusted, and the pressure 60a of the outer blade 15 and the pressure 60b of the roller 31 become equal.

(Action / Effect)
In the first embodiment described above, the coupling mechanism 50 couples the outer blade cassette base 43 and the roller support bracket 33 and moves the outer blade 15 and the roller 31 along opposite directions. Thereby, even if the pressure 60a of the outer blade 15 on the unevenness of the skin surface 41 and the pressure 60b of the roller 31 are different, the pressure 60a of the outer blade 15 on the skin surface 41 and the pressure 60b of the rotating body are adjusted. Thus, the pressure 60a of the outer blade 15 and the pressure 60b of the rotating body are equalized. Therefore, it is possible to prevent the frictional force between the outer blade 15 and the skin surface 41 from becoming high or low, and to prevent the phenomenon that the hairs 39 are shaved too short, or conversely, the hairs 39 cannot be shaved shortly.

  In the first embodiment, the coupling mechanism 50 is formed of a rigid link member, and rotates between the outer blade cassette base 43 and the roller support bracket 33. This makes it difficult for loss to occur in the transmission between the outer blade cassette base 43 and the roller support bracket 33 by the connecting mechanism 50, and it becomes easier to adjust the pressure 60a of the outer blade 15 and the pressure 60b of the rotating body. For this reason, the frictional force between the outer blade 15 and the skin surface 41 can be maintained optimally, and the phenomenon that the body hair 39 is shaved too short or the body hair 39 cannot be shaved shortly can be more reliably prevented.

(2) Second Embodiment Next, an electric shaver 1 according to a second embodiment will be described with reference to the drawings. FIG. 3 is a cross-sectional view of the blade unit 17 of the electric razor 1 according to the second embodiment. In addition, the same code | symbol is attached | subjected to the same part as the electric shaver 1 which concerns on 1st Embodiment mentioned above, and a different part is mainly demonstrated.

  In the first embodiment described above, the rotation support portion 53 is provided at a position closer to the shaft side fixing portion 52 than the outer blade side fixing portion 51. In contrast, in the second embodiment, the rotation support portion 53 is provided at the center position between the outer blade side fixing portion 51 and the shaft side fixing portion 52.

  Specifically, as shown in FIG. 3, the outer blade side fixing portion 51 is located at the center of the orthogonal direction (left and right direction in the drawing) orthogonal to the extending direction of the outer blade 15. Similarly, the shaft-side fixing portion 52 is located at the center in the orthogonal direction orthogonal to the axial direction of the rotation support shaft 35 (the same direction as the extending direction of the outer blade 15). That is, the outer blade cassette base 43 is provided at the center in the orthogonal direction of the outer blade 15, and the roller support bracket 33 is provided at the center in the orthogonal direction of the rotation support shaft 35.

  The distance A from the rotation support part 53 to the outer blade side fixing part 51 is equal to the distance B from the rotation support part 53 to the shaft side fixing part 52. That is, the distance from the center of the rotation support portion 53 to the center of the outer blade cassette base 43 is equal to the distance from the center of the rotation support portion 53 to the center of the roller support bracket 33.

  In the second embodiment described above, the rotation support portion 53 is provided at the center position between the outer blade side fixing portion 51 and the shaft side fixing portion 52. Thereby, when the rotational moment 60c centering on the rotation support part 53 of the connection mechanism 50 is canceled, the pressure 60a of the outer blade 15 and the pressure 60b of the roller 31 can be made equal evenly. For this reason, it can prevent more reliably that the frictional force of the outer blade 15 and the skin surface 41 becomes too high and becomes too low.

(3) Third Embodiment Next, an electric shaver 1 according to a third embodiment will be described with reference to the drawings. FIG. 4 is a cross-sectional view of the blade unit 17 of the electric razor 1 according to the third embodiment. In addition, the same code | symbol is attached | subjected to the same part as the electric shaver 1 which concerns on 1st, 2nd embodiment mentioned above, and a different part is mainly demonstrated.

  In the first and second embodiments described above, the rotation support portion 53 is fixed to the bottom plate protrusion 7b. On the other hand, in the third embodiment, the rotation support portion 53 is variable.

  Specifically, as shown in FIG. 4, the coupling mechanism 50 is a fitting portion in which the rotation support portion 53 is fitted in an orthogonal direction orthogonal to the axial direction of the rotation support portion 53. A plurality of fitting grooves 54 are formed. Then, the rotation support portion 53 is fitted into any of the plurality of fitting grooves 54.

  In the third embodiment described above, the rotation support portion 53 is fitted into any of the plurality of fitting grooves 54. That is, the rotation center axis of the coupling mechanism 50 can be varied, and the pressure 60a of the outer blade 15 and the pressure 60b of the roller 31 can be changed according to the user's preference. That is, the hair 60 can be shaved short by increasing the pressure 60 a of the outer blade 15. On the other hand, the pressure 60b of the roller 31 can be increased to prevent the skin from entering the hole formed in the outer blade 15, thereby realizing skin protection.

  Here, the fitting portion does not necessarily need to be the fitting groove 54, and may be a hole into which the rotation support portion 53 is inserted and fitted.

(4) Other Embodiments As described above, the contents of the present invention have been disclosed through the embodiments of the present invention. However, it is understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. Should not. From this disclosure, various alternative embodiments, examples, and operational techniques will be apparent to those skilled in the art.

  For example, the embodiment of the present invention can be modified as follows. Specifically, the electric shaver 1 is not limited to what was demonstrated in embodiment mentioned above. For example, the electric razor 1 may be an electric razor provided with at least an outer blade cassette 25 as an outer blade support portion and a roller support bracket 33 as a rotating shaft support portion.

  Moreover, although the connection mechanism 50 was demonstrated as what is directly connected with the roller support bracket 33, it is not limited to this. For example, the coupling mechanism 50 may be coupled to the roller support bracket 33 via some member.

  Moreover, although the connection mechanism 50 demonstrated as what connects the outer blade cassette base 43 and the roller support bracket 33 on the left side of drawing, it is not limited to this. For example, the connecting mechanism 50 may connect the outer blade cassette base 43 and the roller support bracket 33 on the right side of the drawing, or may connect both the outer blade cassette base 43 and the roller support bracket 33. Good.

  Moreover, although the connection mechanism 50 was demonstrated as what is formed by the link which consists of rigid bodies, it is not limited to this. For example, the coupling mechanism 50 may be a hydraulic type, an elastic body (for example, a spring), a gear mechanism, or the like, and may be a mechanism that moves the outer blade 15 and the roller 31 along opposite directions.

  Further, the coupling mechanism 50 may include a lock mechanism (such as an engagement portion or a gear portion) that is locked at a predetermined position. For example, the coupling mechanism 50 may be locked so that the pressure 60a of the outer blade 15 and the pressure 60b of the roller 31 become predetermined pressures according to the user's preference.

  As described above, the present invention naturally includes various embodiments that are not described herein. Therefore, the technical scope of the present invention is determined only by the invention specifying matters according to the scope of claims reasonable from the above description.

DESCRIPTION OF SYMBOLS 1 ... Electric razor 13 ... Inner blade 14 ... Inner blade cassette 15 ... Outer blade 25 ... Outer blade cassette (outer blade support part)
31 ... Roller (rotating body)
33 ... Roller support bracket (rotating shaft support)
35 ... Rotation support shaft (rotation shaft)
43 ... Outer blade cassette base 50 ... Connection mechanism 51 ... Outer blade side fixing portion 52 ... Shaft side fixing portion 53 ... Rotation support portion 54 ... Fitting groove (fitting portion)

Claims (4)

An outer blade support that supports the outer blade in contact with the skin surface;
An electric razor comprising a rotating shaft support portion that supports a rotating shaft of a rotating body that rotates while contacting the skin surface;
An electric shaver further comprising a connection mechanism for connecting the outer blade support portion and the rotating shaft support portion and moving the outer blade and the rotating body in opposite directions. The electric razor according to claim 1,
The connecting mechanism is formed of a link member made of a rigid body, and rotates between the outer blade support part and the rotary shaft support part. An electric shaver according to claim 1 or 2,
The coupling mechanism is
An outer blade side fixing portion fixed to the outer blade support portion;
A shaft side fixing portion fixed to the rotating shaft support portion;
A rotation support unit that rotatably supports the coupling mechanism;
The rotating razor is provided in a center position between the outer blade side fixing portion and the shaft side fixing portion. An electric shaver according to any one of claims 1 to 3,
The coupling mechanism is formed with a plurality of fitting portions into which the rotation support portion is fitted in an orthogonal direction orthogonal to the axial direction of the rotation support portion,
An electric shaver characterized in that a rotation center axis of the coupling mechanism is fitted into any of the plurality of fitting portions.

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