EP2554339B1 - Rasoir électrique - Google Patents

Rasoir électrique Download PDF

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Publication number
EP2554339B1
EP2554339B1 EP11759499.4A EP11759499A EP2554339B1 EP 2554339 B1 EP2554339 B1 EP 2554339B1 EP 11759499 A EP11759499 A EP 11759499A EP 2554339 B1 EP2554339 B1 EP 2554339B1
Authority
EP
European Patent Office
Prior art keywords
hair
hair lifting
frames
blade
portions
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP11759499.4A
Other languages
German (de)
English (en)
Other versions
EP2554339A1 (fr
EP2554339B2 (fr
EP2554339A4 (fr
Inventor
Hiroaki Shimizu
Noboru Kobayashi
Shunsuke Komori
Toshio Ikuta
Jyuzaemon Iwasaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Panasonic Corp
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Publication date
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Application filed by Panasonic Corp filed Critical Panasonic Corp
Publication of EP2554339A1 publication Critical patent/EP2554339A1/fr
Publication of EP2554339A4 publication Critical patent/EP2554339A4/fr
Publication of EP2554339B1 publication Critical patent/EP2554339B1/fr
Application granted granted Critical
Publication of EP2554339B2 publication Critical patent/EP2554339B2/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/38—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards
    • B26B19/384—Dry-shaver foils; Manufacture thereof

Definitions

  • the present invention relates to an electric shaver.
  • Patent Document 1 Japanese Patent No. 3083548
  • JP 57-39871 a further shaver is disclosed with an outer blade, wherein perpendicular to a shaving direction alternatingly holes and protrusions are formed.
  • the protrusions protrude towards a skin of a user to support lifting the hair to pass through the holes and to improve a shaving performance.
  • the hair lifting frames provided with the hair lifting portions are uniformly arranged in the outer blades.
  • outer blades are formed into an arc-like shape projecting toward the skin surface.
  • the skin contact surface located on the front side of the outer blade in the traveling direction on the basis of the top portion of the outer blade comes into contact with the skin in a different manner from the skin contact surface located on the rear side in the traveling direction, in which a hair lifting ability of second hair lifting frames provided on the skin contact surface on the rear side tends to be lower than that of first hair lifting frames provided on the skin contact surface on the front side.
  • an electric shaver includes: a shaver main body; an outer blade having blade holes defined by frames; an inner blade provided inside the outer blade to move relative to the outer blade and cut body hair inserted into the blade holes, and hair lifting portions provided on the frames of the outer blade to come into contact with the body hair and lift the body hair from the skin surface when moving on a skin surface, wherein the outer blade is formed into an arc-like shape projecting toward the skin surface and exposed on a top end surface of the shaver main body, the hair lifting portions include first hair lifting portions provided on a front side in a traveling direction of the shaver main body and second hair lifting portions provided on a rear side in the traveling direction based on a top portion of the outer blade, and the second hair lifting portions have a hair lifting ability higher than the first hair lifting portions.
  • the second hair lifting portions have the hair lifting ability higher than the first hair lifting portions. Therefore, during the use of the electric shaver, the second hair lifting portions, which are provided on the skin contact surface on the rear side in which a contact pressure with the skin surface is low, can come into contact with the skin surface 37 more easily. As a result, the differences in hair lifting ability between the first hair lifting portions and the second hair lifting portions can be reduced, so as to lift the body hair up more efficiently.
  • FIGS. 1 to 11 are views showing an electric shaver according to the embodiment of the present invention.
  • an electric shaver 1 is mainly composed of a shaver main body 3, a blade unit 4 provided on the top of the shaver main body 3, and a driving unit (not shown in the figures.) to drive the blade unit 4.
  • the shaver main body 3 is divided into a grip portion 7 held by a user, and a head unit 5 connected to the upper end of the grip portion 7.
  • the head unit 5 is provided with the blade unit 4 to remove body hair
  • the grip portion 7 is provided with a push-button switch 9 to control the driving unit to operate (turn on and off) the blade unit 4.
  • the blade unit 4 includes outer blades 11 exposed on the top end surface of the shaver main body 3, and inner blades 13 provided inside the outer blades 11 (below the outer blades 11) and configured to reciprocate in a longitudinal direction 23.
  • the outer blades 11 include a first net blade 17, a second net blade 19 and a third net blade 21, which are arranged parallel to each other in a short-side direction 25 that is the traveling direction (the shaving direction) of the electric shaver 1.
  • the first to third net blades 17, 19 and 21 extend in the longitudinal direction 23 perpendicular to the short-side direction 25.
  • the first net blade 17 and the second net blade 19 are located on both sides (on one side and the opposite side) in the short-side direction 25, and the third net blade 21 is located between the first net blade 17 and the second net blade 19.
  • the first to third net blades 17, 19 and 21 composing the outer blades 11 are each formed into an arc-like shape projecting toward the skin of a user (toward the upper side in the present embodiment) as shown in FIG. 4 .
  • the first to third net blades 17, 19 and 21 are formed into an inverted U-shape in cross-section in the short-side direction 25 each having a top portion 27 and both side surfaces 29 and 29.
  • the inner blades 13 are formed to conform to the inner shape of the respective net blades 17, 19 and 21.
  • the outer blades 11 are provided with a number of blade holes 36 that introduce body hair thereinto.
  • the inner blades 13 move relative to the outer blades 11 (reciprocate in the longitudinal direction 23) so that the inner blades 13 cut the introduced body hair in cooperation with the outer blades 11.
  • the blade holes 36 are defined by frames 32.
  • the frames 32 of the outer blades 11 include transverse frames 35 extending in an inverted U-shaped manner in the short-side direction 25 and vertical frames 30 extending in the longitudinal direction 23, and the blade holes 36 are defined by the transverse frames 35 and the vertical frames 30.
  • the blade holes 36 have the dimension sufficient to introduce the body hair thereinto.
  • a dashed-dotted line Y is a center line (the top) passing through the middle of the top portion 27 in the short-side direction 25.
  • the vertical frames 30 include first frames 31 having the cross-sectional shape shown in FIG. 6 , second frames 34 having the cross-sectional shape shown in FIG. 7 , and hair lifting frames 33 having the cross-sectional shape shown in FIG. 8(a) .
  • each first frame 31 includes a surface (a skin contact surface) 31a formed into an approximately flat shape located on the skin side (on the upper side in the figure) to come into contact with the skin, a bottom surface 31b formed into a flat shape located on the inner blade 31 side (on the lower side in the figure), and side surfaces 31c and 31c smoothly connecting the surface (the skin contact surface) 31a and the bottom surface 31b in the short-side direction.
  • the first frame 31 is thus formed into a barrel-vaulted shape.
  • sliding contact portions 31e projecting toward the inner blade 13 to slidably come into contact with the inner blade 13 are formed on both sides of a bottom portion 31d in the short-side direction of the first frame 31 to cut the body hair together with the inner blade 13.
  • each short-side edge 31g of an upper portion 31f of the first frame 31 is formed into a semicircular shape in cross-section having a radius of curvature of R1.
  • the R1 is preferably 10 ⁇ m, for example.
  • a surface 37 of the transverse frame 35 is located closer to the skin than the surface 31a of the first frame 31, and the vertical distance between the surface 31a of the first frame 31 and the surface 37 of the transverse frame 35 is set to L1.
  • each second frame 34 is formed into substantially the same outer shape as the first frame 31, and includes a surface (a skin contact surface) 34a formed into an approximately flat shape, a bottom surface 34b, and side surfaces 34c and 34c smoothly connecting the surface 34a and the bottom surface 34b in the short-side direction.
  • the second frame 34 is thus formed into a barrel-vaulted shape.
  • the surface 34a of the second frame 34 is located closer to the skin than the surface 31a of the first frame 31, and the vertical distance between the surface 34a of the second frame 34 and the surface 37 of the transverse frame 35 is set to L3.
  • each hair lifting frame 33 is formed into an approximately V-shape in cross-section.
  • a plate portion 33a formed into an approximately flat plate is formed in the middle portion in the short-side direction, and inclined portions 33b provided on both sides of the plate portion 33a in the short-side direction inclined upward in the short-side direction from the flat plate portion 33a.
  • the inclined portions 33b are formed into a tapered shape tapering toward the both ends in the short-side direction from the plate portion 33a.
  • Both short-side edges 331 of the inclined portions 33b are provided with hair lifting portions 33c to lift the body hair up.
  • the hair lifting portions 33c have a function to efficiently lift the body hair at a small angle to the skin surface (that is, the lying body hair).
  • each hair lifting frame 33 is provided with one hair lifting portion 33c (on the right side in FIG. 8 ) to function to lift the body hair up when moving mainly in one direction of the shaving direction (from left to right in FIG. 3 ), and the other hair lifting portion 33c (on the left side in FIG. 8 ) to function to lift the body hair up when moving mainly in the opposite direction of the shaving direction (from right to left in FIG. 3 ).
  • each hair lifting frame 33 is composed of an upper flat surface 33d of the plate portion 33a, upper inclined surfaces 33e of the inclined portions 33b, a bottom surface 33f of the plate portion 33a, and lower inclined surfaces 33g of the inclined portions 33b.
  • the vertical distance between the short-side edge 331 of each hair lifting portion 33c and the surface 37 of the transverse frame 35 is set to L2.
  • the hair lifting frames 33 are arranged in an offset manner so as to satisfy the magnitude relation of L2 ⁇ L3 ⁇ L1.
  • each inclined portion 33b is formed into a semicircular shape in cross-section having a radius of curvature of R2.
  • the R2 is preferably 3 ⁇ m, for example.
  • a clearance angle ⁇ formed by the upper inclined surface 33e and a reference line 57 in the short-side direction indicated by the chain double-dotted line is set larger than the clearance angle formed by the surface 31a of the first frame 31 and the reference line 57 in the short-side direction (that is 0°) and the clearance angle formed by the surface 34a of the second frame 34 and the reference line 57 in the short-side direction (that is 0°).
  • each longitudinal end portion 33j of the hair lifting frame 33 extends substantially linearly in cross-section from a side wall 59 of the transverse frame 35 in the longitudinal direction.
  • Each longitudinal end portion 33j is connected to a longitudinal center portion 33k via a gently-curved boundary 33m.
  • a radius of curvature of the boundary 33m is preferably 10 ⁇ m, for example.
  • the vertical frames 30 include the hair lifting frames 33 provided with the hair lifting portions 33c having a hair lifting ability higher than the first and second frames 31 and 34, the first frames 31 provided in such a manner that the surface 31a is located closer to the inner blade 13 than the short-side edges 331 of the hair lifting portions 33c, and the second frames 34 provided in such a manner that the surface 34a is located closer to the skin than the surface 31a of the first frame 31.
  • the hair lifting portions (second hair lifting portions) 33c provided on the rear side in the traveling direction on the basis of the top Y of the respective outer blades 11 have a hair lifting ability higher than the hair lifting portions (first hair lifting portions) 33c provided on the front side.
  • a pair of hair lifting frames 33A and 33B (the hair lifting frames 33 described above) having the identical shape are provided on one side (on the right side in FIG. 11 ) and on the other side (on the left side in FIG. 11 ) in the traveling direction on the basis of the top Y of the outer blade 11.
  • the first frames 31 are provided between the pair of the hair lifting frames 33A and 33B.
  • the first frames 31 are arranged in front of the hair lifting frame 33B having the second hair lifting portions 33c and adjacent to the hair lifting frame 33B.
  • the second frames 34 are provided on the outer sides of the pair of the hair lifting frames 33A and 33B.
  • the space in front of the second hair lifting portion (the hair lifting portion located on the right side of the hair lifting frame 33B in FIG. 11 ) 33c is increased so that the skin surface 37 is more strongly pressed to the inner blade 13 side. Therefore, during the use of the electric shaver 1, the second hair lifting portions 33c can easily come into contact with the skin surface 37. As a result, the differences in hair lifting ability between the first hair lifting portions 33c and the second hair lifting portions 33c can be reduced, so as to lift the body hair up more efficiently.
  • the first frames 31 are provided between the pair of the hair lifting frames 33A and 33B, even when the shaving direction of the electric shaver 1 is reversed (that is, in the case in which the left side is defined as the front side in the traveling direction in FIG. 11 ), the above-described effects can also be achieved.
  • the second hair lifting portions 33c provided on the rear side in the traveling direction on the basis of the top Y of the respective outer blades 11 have the hair lifting ability higher than the first hair lifting portions 33c provided on the front side.
  • the second hair lifting portions 33c which are provided on the skin contact surface on the rear side having a low contact pressure with the skin surface 37, can come into contact with the skin surface 37 more easily.
  • the differences in hair lifting ability between the first hair lifting portions 33c and the second hair lifting portions 33c can be reduced, so as to lift the body hair up more efficiently.
  • due to the increase in hair lift efficiency it is possible to improve performance of introduction of the lying body hair into the outer blades 11, and enhance the shaving ability of the electric shaver 1.
  • the frames 32 of the outer blades 11 include the pair of the hair lifting frames 33A and 33B provided with the first and second hair lifting portions 33c and 33c having the identical shape, and the first frames 31 provided in such a manner that the skin contact surface 31a that comes into contact with the skin is provided closer to the inner blade 13 than the first and second hair lifting portions 33c and 33c, in which the first frames 31 are provided between the pair of the hair lifting frames 33A and 33B and adjacent to these hair lifting frames.
  • the second hair lifting portions 33c can easily come into contact with (can be easily pressed to) the skin surface 37, and the hair lifting ability of the second hair lifting portions 33c can be increased with respect to the first hair lifting portions 33c.
  • each hair lifting frame 33 is provided with one hair lifting portion 33c (on the right side in FIG. 8 ) to function to lift the body hair up when moving mainly in one direction of the shaving direction (from left to right in FIG. 3 ), and the other hair lifting portion 33c (on the left side in FIG. 8 ) to function to lift the body hair up when moving mainly in the opposite direction of the shaving direction (from right to left in FIG. 3 ).
  • the hair lifting frames 33 are provided on one side and the other side on the basis of the top Y of the respective outer blades 11, and the first frames 31 are provided between the pair of the hair lifting frames 33A and 33B.
  • the effect that the second hair lifting portions 33c located on the rear side in the traveling direction can have the hair lifting ability higher than the first hair lifting portions 33c located on the front side is achieved.
  • the differences in hair lifting ability between the first hair lifting portions 33c and the second hair lifting portions 33c can be reduced so as to lift the body hair up more efficiently whichever direction the electric shaver 1 moves, forward or backward in the shaving direction. Accordingly, the effect of improving usability for a user can be achieved.
  • the frames 32 include the vertical frames 30 extending in the longitudinal direction 23 of the outer blades, and the transverse frames 35 extending in the short-side direction 25, in which the hair lifting frames 33 having the hair lifting portions 33c are provided in the vertical frames 30.
  • the body hair lifted by the hair lifting frames 33 is easily inserted into the blade holes 36 so as to shave the body hair easily.
  • the hair lifting portions 33c of the hair lifting frames 33 are formed into a tapered shape inclined upward and extending toward the outer surfaces of the outer blades 11 (in the upper direction in the figure). Since the short-side edges 331 are formed into a tapered shape in cross-section, the hair lifting portions 33c having a simple configuration can be provided.
  • the tapered shape of the hair lifting portions 33c inclined upward and extending toward the outer surfaces of the outer blades 11 (in the upper direction in the figure) can prevent the body hair at a small hair rising angle from entering the gap between the hair lifting portions 33c and the skin, and can lift the lying body hair up more reliably.
  • the longitudinal end portions 33j of the hair lifting frames 33 are formed into an approximately linear shape in cross-section, the inclined portions 33b are provided in the longitudinal center portions 33k, and the longitudinal end portions 33j located on both sides are respectively connected to the longitudinal center portions 33k via the gently-curved boundaries 33m. Due to the gently-curved boundaries 33m connecting the respective longitudinal end portions 33j located on both sides and the longitudinal center portions 33k of the hair lifting frames 33, an influence (damage) on the skin surface 37 caused by the boundaries 33m can be prevented when sliding the outer blades 11 along the skin surface 37.
  • the present invention is not limited to the foregoing embodiment, and various modifications can be made.
  • the first frames 31 having the lower skin contact surfaces 31a are provided between the pair of the hair lifting frames 33A and 33B having the identical shape so that the second hair lifting portions 33c have the hair lifting ability higher than the first hair lifting portions 33c.
  • the first hair lifting portions 33c and the second hair lifting portions 33c may have different shapes and configurations in order to increase the hair lifting ability of the second hair lifting portions.
  • the differences in hair lifting ability between the first hair lifting portions provided on the front side in the traveling direction and the second hair lifting portions provided on the rear side in the traveling direction on the basis of the top of the respective outer blades can be reduced. Accordingly the electric shaver capable of lifting the body hair up more efficiently can be obtained.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)

Claims (2)

  1. Rasoir électrique (1) comprenant :
    un corps principal de rasoir (3) ;
    une lame externe (11) ayant des trous de lame (36) définis par des bâtis (32) ;
    une lame interne (13) prévue à l'intérieur de la lame externe (11) pour se déplacer par rapport à la lame externe (11) dans une direction longitudinale et couper le poil corporel inséré dans les trous de lame (36), et
    des parties de soulèvement de poil (33) prévues sur les bâtis (32) de la lame externe (11) pour venir en contact avec le poil corporel et soulever le poil corporel de la surface cutanée lors du déplacement sur une surface cutanée, dans lequel la lame externe (11) est formée selon une forme d'arc faisant saillie vers la surface cutanée dans une section transversale le long d'une direction du côté court perpendiculaire à la direction longitudinale, et la lame externe (11) est exposée sur une surface d'extrémité supérieure du corps principal de rasoir (3),
    caractérisé en ce que dans un cas dans lequel la direction de côté court correspond à une direction de rasage et une direction de déplacement du corps principal de rasoir (3) qui est déplacé le long de la direction de rasage, est définie comme étant une direction de déplacement du corps principal de rasoir (3), les parties de soulèvement de poil (33) comprennent des premières parties de soulèvement de poil (33A) prévues sur un côté avant dans une direction de déplacement du corps principal de rasoir (3) et des secondes parties de soulèvement de poil (33B) prévues sur un côté arrière dans la direction de déplacement sur la base d'une partie supérieure de la lame externe (11), et
    les secondes parties de soulèvement de poil (33B) ont une capacité de soulèvement de poil supérieure aux première parties de soulèvement de poil (33A).
  2. Rasoir électrique (1) selon la revendication 1, dans lequel :
    chacun des bâtis (32) de la lame externe (11) comprend une paire de bâtis de soulèvement de poil (33) comprenant des premières et secondes parties de soulèvement de poil (33c) qui sont formées selon une forme identique, et un premier bâti (31) ayant une surface de contact qui vient en contact avec la peau et est positionné plus à proximité de la lame interne (13) que les premières et secondes parties de soulèvement de poil (33c) ; et
    le premier bâti (31) est prévu entre et de manière adjacente à la paire de bâtis de soulèvement de poil (33).
EP11759499.4A 2010-03-26 2011-03-24 Rasoir électrique Active EP2554339B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010071571A JP5421834B2 (ja) 2010-03-26 2010-03-26 電気かみそり
PCT/JP2011/057144 WO2011118694A1 (fr) 2010-03-26 2011-03-24 Rasoir électrique

Publications (4)

Publication Number Publication Date
EP2554339A1 EP2554339A1 (fr) 2013-02-06
EP2554339A4 EP2554339A4 (fr) 2013-11-27
EP2554339B1 true EP2554339B1 (fr) 2019-05-08
EP2554339B2 EP2554339B2 (fr) 2022-09-21

Family

ID=44673240

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11759499.4A Active EP2554339B2 (fr) 2010-03-26 2011-03-24 Rasoir électrique

Country Status (3)

Country Link
EP (1) EP2554339B2 (fr)
JP (1) JP5421834B2 (fr)
WO (1) WO2011118694A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5739871A (en) 1980-08-20 1982-03-05 Hitachi Maxell Electric razor
EP1930137A1 (fr) 2006-12-08 2008-06-11 Matsushita Electric Works, Ltd. Feuille de rasage pour rasoir à sec
US20090271994A1 (en) 2006-11-08 2009-11-05 Martin Kluge Shaving foil for an electric shaving apparatus
EP2347869A1 (fr) 2010-01-22 2011-07-27 Panasonic Electric Works Co., Ltd Rasoir électrique

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5837871U (ja) * 1981-09-07 1983-03-11 三洋電機株式会社 電気かみそりの外刃
JPS5858469U (ja) * 1981-10-15 1983-04-20 東芝テック株式会社 電気かみそりの外刃
JPS6044765U (ja) * 1983-08-31 1985-03-29 日本電気ホームエレクトロニクス株式会社 電気カミソリの外刃
NL8902807A (nl) 1989-11-14 1991-06-03 Philips Nv Scheerapparaat.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5739871A (en) 1980-08-20 1982-03-05 Hitachi Maxell Electric razor
US20090271994A1 (en) 2006-11-08 2009-11-05 Martin Kluge Shaving foil for an electric shaving apparatus
EP1930137A1 (fr) 2006-12-08 2008-06-11 Matsushita Electric Works, Ltd. Feuille de rasage pour rasoir à sec
EP2347869A1 (fr) 2010-01-22 2011-07-27 Panasonic Electric Works Co., Ltd Rasoir électrique

Also Published As

Publication number Publication date
JP5421834B2 (ja) 2014-02-19
EP2554339A1 (fr) 2013-02-06
EP2554339B2 (fr) 2022-09-21
WO2011118694A1 (fr) 2011-09-29
JP2011200489A (ja) 2011-10-13
EP2554339A4 (fr) 2013-11-27

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