JP2011147646A - Electric razor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an electric razor which can aim at a further improvement in the introductory performance to an external edge of body hair which lies down. <P>SOLUTION: The electric razor 1 has: a grip part 2, which is held by the hand, the external edge 8, which has an edge hole 40 divided by a bar 37; an inner edge 17, which cuts the body hair which is inserted in the edge hole 40 in cooperation with the external edge 8 by carrying out relative movement to the external edge 8 by being arranged in the inside direction of the external edge 8; a motor 33 as an external edge driving means which carries out the relative movement of the external edge 8 to the grip part 2, a pinion 34; and racks 35 and 36. Further a napping part 45, which makes the body hair stand up to the skin surface by coming in contact with the body hair when the external edge 8 moves on the skin surface, is formed in the bar 38b which extends in a direction of bisecting the relative movement direction to the grip part 2 of the external edge 8. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electric razor.

  Conventionally, as an electric razor, a plurality of outer blades each incorporating an inner blade that reciprocates in a direction perpendicular to the shaving direction are juxtaposed in the shaving direction, and each outer blade is vibrated in a direction perpendicular to the shaving direction. Is known (for example, see Patent Document 1).

  In this patent document 1, each outer blade is vibrated in the direction orthogonal to the shaving direction, thereby improving the introduction performance of the body hair lying in the direction orthogonal to the shaving direction.

JP 2007-29123 A

  In this way, if each outer blade is vibrated in a direction orthogonal to the shaving direction, it is possible to improve the introduction performance of body hair lying in the direction orthogonal to the shaving direction with respect to the outer blade. It is still more preferable if the introduction performance of the body hair to the outer blade can be further improved.

  Then, an object of this invention is to obtain the electric shaver which can aim at the further improvement of the introduction performance with respect to the outer blade of the sleeping body hair.

  In the present invention, a grip portion to be gripped by hand, an outer blade having a blade hole defined by a crosspiece, and an inner blade of the outer blade disposed relative to the outer blade. An electric razor comprising: an inner blade that cuts the body hair that is inserted into the blade hole in cooperation with the outer blade; and an outer blade driving means that moves the outer blade relative to the grip portion. The outer blades extending in a direction intersecting with the direction of relative movement of the outer blades with respect to the grip portion of the outer blades, contacting the body hair when the outer blades move on the skin surface. The most important feature is that a raised portion for raising body hair is provided.

  According to the present invention, since the raised portions are provided on the crosspieces extending in the direction intersecting the relative movement direction of the outer blade with respect to the grip portion, the sleeping hair can be efficiently removed during the relative movement of the outer blade with respect to the grip portion. Can be brushed. As a result, it is possible to further improve the introduction performance of the sleeping hair on the outer blade.

FIG. 1 is a perspective view showing an electric razor according to an embodiment of the present invention. FIG. 2 is an exploded perspective view showing the blade head. FIG. 3 is a plan view schematically showing a crosspiece provided with a raised portion of the outer blade. FIG. 4 is a schematic view of the outer blade as viewed from the side. FIG. 5 is an enlarged perspective view of a part of the outer blade. 6A is a cross-sectional view taken along the line AA of FIG. 5, and FIG. 6B is an enlarged cross-sectional view of a short-side end. 7A is a cross-sectional view taken along the line BB in FIG. 5, and FIG. 7B is an enlarged cross-sectional view of the raised portion. FIG. 8 is an enlarged perspective view of the periphery of the longitudinal rail in FIG. 9 is an enlarged cross-sectional view taken along the line CC of FIG. FIG. 10 is a plan view schematically showing a crosspiece provided with a raised portion when the outer blade reciprocates in the shaving direction. FIG. 11 is a plan view schematically showing a crosspiece provided with a raised portion when the outer cutter reciprocates in the reciprocating direction of the inner cutter. FIG. 12 is a plan view schematically showing a crosspiece provided with a raised portion when the outer blade revolves around an axis along a direction substantially orthogonal to the reciprocating direction and the shaving direction of the inner blade. FIG. 13 is a side view schematically showing the distribution of contact pressure between the outer blade and the skin surface when the outer blade is swiveled around an axis along the reciprocating direction of the inner blade. Is a side view showing a state where the top portion is located above, and (b) is a side view showing a state where portions other than the top portion are located above. FIG. 14 is a front view schematically showing the distribution of contact pressure between the outer blade and the skin surface when the outer blade swivels around an axis along the shaving direction. FIG. The front view which shows the state located in (b) is a front view which shows the state in which other than a top part is located upwards. FIG. 15 is a side view schematically showing the outer cutter when the outer cutter reciprocates in a direction substantially orthogonal to the reciprocating motion direction and the shaving direction of the inner cutter. 16A is a side view schematically showing the distribution of contact pressure between the outer blade and the skin surface during rough shaving, and FIG. 16B is the distribution of contact pressure between the outer blade and the skin surface during finishing shaving. It is a side view which shows typically. FIG. 17 is a cross-sectional view showing a longitudinal rail according to a modification of the embodiment of the present invention, in which (a) is a cross-sectional view at the top and (b) is a cross-sectional view at the outside.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following, the direction in which a plurality of outer blades are arranged side by side is the front-rear direction (shaving direction) X, and the direction in which each outer blade extends is the left-right direction (direction substantially orthogonal to the shaving direction: the reciprocating direction of the inner blades) ) Y will be described. Further, the vertical direction in a state in which the head portion is disposed so that the outer blade faces upward will be described as the vertical direction (direction substantially orthogonal to the reciprocating direction of the inner blade and the shaving direction) Z.

  As shown in FIG. 1, the electric shaver 1 according to the present embodiment includes a grip part 2 that is gripped by a hand, and a head part 5 that is swingably supported with respect to the grip part 2 in the front-rear direction and the left-right direction. It has.

  The grip portion 2 includes a synthetic resin grip body 3 and a synthetic resin grip connection portion 4 projecting rearward from the upper surface of the grip body 3. A known left / right swing mechanism (not shown) for swinging the head portion 5 in the left / right direction is provided on the upper surface of the grip connection portion 4. Between the lower part, a known front / rear swing mechanism (not shown) for swinging the head unit 5 in the front / rear direction is provided. The head portion 5 may be swung in any one direction without being swung in the front-rear direction and the left-right direction, or may be fixed to the grip portion 2 so that the head portion 5 is not swung. Good.

  The head unit 5 includes a linear motor (not shown), and is connected to the grip connection unit 4 so as to be swingable in the front-rear direction and the left-right direction, and a shaving blade unit to which the linear head unit 6 is attached. 7. As shown in FIG. 1, the grip body 3 is formed with a switch portion 90 for turning on / off the driving of the linear motor and a display portion 91 for displaying a charging state of a battery (not shown) built in the grip body 3. Has been. In addition, you may make it display things other than the charge condition of a battery on the display part 91, and you may make it not provide a display part in the grip main body 3. FIG.

  The shaving blade unit 7 is disposed on the inner side of the outer blade 8 (below the outer blade 8) and is relatively moved with respect to the outer blade 8. And an inner blade 17 to be provided.

  In the present embodiment, four (plural) outer blades are provided, and the first net blade 9, the finishing net blade 10, the slit blade 11, and the second net blade 12 are arranged in parallel in the front-rear direction X. Yes.

  As shown in FIG. 4, the net blades 9, 10, and 12 are all along the front-rear direction (short direction) X so that the upper side is convex in a side view (when the outer blade is viewed in the left-right direction Y). And curved in an inverted U shape. Furthermore, the net blades 9, 10, and 12 are formed to be slightly curved along the left-right direction (longitudinal direction) Y so that the upper side is convex when viewed from the front (when the outer blade is viewed in the front-rear direction X). Yes. In the present embodiment, the net blades 9, 10, and 12 are curved so that the upper side is convex in a front view, but it is not always necessary to bend.

  In the net blades 9, 10, and 12, a large number of blade holes 40 are defined by crosspieces 37. In this embodiment, as shown in FIGS. 1 and 2, the blade width of the finishing net blade 10 (width in the front-rear direction X) is the blade width (front-rear direction) of the first and second net blades 9, 12. X width). As described above, the width of the finishing net blade 10 is smaller than that of the other net blades 9 and 12, that is, the skin pressed against the surface by providing a small radius of curvature of the finishing net blade 10. Is protruded inward from the blade hole 40 so that the hair can be shaved short.

  The slit blade 11 is formed in a U-shaped curve along the front-rear direction (short direction) X, and is formed by drilling a large number of slits from the flat upper wall to the side wall.

  The net blades 9, 10, 12 and the slit blade 11 constituting the outer blade 8 are attached to dedicated outer blade frames 13, 14, 16, and 15, respectively.

  Furthermore, a skin guard member 14a is formed on the first net blade 9 side of the outer blade frame 14, and the radius of curvature is determined by the slit blade 11 and the skin guard member 14a sandwiching the finishing net blade 10 back and forth. It effectively prevents the skin from being strongly pressed against the small finishing net blade 10.

  The outer blade frame 13 to which the first net blade 9 is attached and the outer blade frame 14 to which the finishing net blade 10 is attached are respectively engaged with the holding frame 28 and the outer blade frame to which the slit blade 11 is attached. The outer blade frame 16 to which the blade frame 15 and the first net blade 12 are attached is engaged with the holding frame 29, respectively.

  The outer cutter frames 13 and 14 are held by a holding frame 28 so as to be movable up and down independently, and the outer cutter frames 15 and 16 are held by a holding frame 29 so as to be able to move up and down independently. Yes.

  The holding frames 28 and 29 are attached to the movable bases 26 and 27, respectively, and the movable bases 26 and 27 are attached to the upper surface of the linear head unit 6.

  The inner blade 17 is provided exclusively for the net blades 9, 10, 12 and the slit blade 11 constituting the outer blade 8. Specifically, as shown in FIG. 2, below each net blade 9, 10, 12 (inward), an inverted U-shaped inner blade 18 that follows the curvature of the corresponding net blade 9, 10, 12. , 19, 21 are disposed. In addition, a U-shaped slit inner blade 20 along the curve of the slit blade 11 is disposed below (inward) the slit blade 11.

  The inner blades 18, 19, 20, and 21 are mounted on dedicated drive rods 22, 22a, 23a, and 23, respectively.

  At this time, the inner blades 18, 19, 20, and 21 are mounted on the drive rods 22, 22a, 23a, and 23 so as to be biased upward, and pressed against the inner surfaces of the outer blades 9, 10, 11, and 12, respectively. It is preferable to do so.

  The drive rods 22 and 23 are attached to drive pins 30 and 31 formed on the linear motor via sliders 24 and 25, respectively. The movable bases 26 and 27 are provided with substantially rectangular openings 26a and 27a that allow the sliders 24 and 25 to move relative to each other (reciprocating in the left-right direction Y). It can be reciprocated in the left-right direction Y without interfering with the bases 26 and 27.

  When the linear motor is driven, the drive pins 30 and 31 reciprocate in the left-right direction (longitudinal direction) Y in opposite phases, and the inner blades 18 and 19 interlock with the reciprocation of the drive pins 30 and 31. , 20, 21 reciprocate in the left-right direction (longitudinal direction) Y.

  In this embodiment, the driving rod 22a is fixed to the driving rod 22 and the driving rod 23a is fixed to the driving rod 23, respectively, and the inner blades 18 and 19 are reciprocated integrally, and the inner blades 20 and 21 are The blades 18 and 19 are configured to reciprocate integrally with the opposite phase.

  In this way, the inner blades 18, 19, 20, and 21 disposed below (inward) the outer blades 9, 10, 11, and 12 are connected to the outer blades 9, 10, 11, and 12, respectively. The body hairs inserted into the blade holes 40 of the outer blades 9, 10, 12 and the slits of the slit blade 11 are moved to the outer blades 9, 10, 11, by moving relative to each other (reciprocating in the left-right direction Y). 12 and the inner blades 18, 19, 20, 21 are configured to cut together.

  Furthermore, in this embodiment, the outer blade drive means for moving the outer blade 8 relative to the grip portion 2 is provided.

  Specifically, the motor 33, the pinion 34 attached to the motor shaft 33a of the motor 33, and the racks 35 and 36 having gears meshed with the gears on the side surface of the pinion 34 constitute drive means. .

  The movable bases 26 and 27 are provided with the above-described openings 26 a and 27 a, and guide pins 32 provided on the upper surface of the linear head portion 6 on both sides in the left-right direction Y of the openings 26 a and 27 a. , 32 are respectively provided with long holes 26b, 27b.

  In the present embodiment, the long holes 26b and 27b extend in the direction intersecting with the front-rear direction X and the left-right direction Y (arrow a direction in FIG. 3), respectively.

  The racks 35 and 36 are attached to the movable bases 26 and 27, respectively, and the motor 33 alternately repeats forward rotation and reverse rotation, so that the movable bases 26 and 27 are moved in the front-rear direction X and the left-right direction Y, respectively. It will reciprocate in the opposite phase in the intersecting direction (the direction of arrow a in FIG. 3). The movable bases 26 and 27 reciprocate in the direction of arrow a, so that the outer blades attached to the movable bases 26 and 27 via the holding frames 28 and 29 and the outer blade frames 13, 14, 15 and 16. 9, 10, 11, 12 reciprocate in the direction of arrow a. That is, in this embodiment, the outer cutter 8 reciprocates in a plane including the reciprocating direction Y and the shaving direction X of the inner cutter by the motor 33, the pinion 34, and the racks 35 and 36 as outer cutter driving means. I am doing so.

  A long hole (not shown) extending substantially parallel to the extending direction of the long holes 26b, 27b is provided on the lower surface side of the sliders 24, 25. Then, the drive pins 30 and 31 are slidably inserted into the long holes (not shown), so that the sliders 24 and 25 reciprocate in the left and right direction (longitudinal direction) Y while moving the arrows a of the movable bases 26 and 27. Following the reciprocating motion in the direction, the reciprocating motion can also be performed in the direction of arrow a.

  As described above, in the present embodiment, the left-right swing mechanism performs a turning motion (relative movement of the outer blade 8 with respect to the grip portion 2) about the axis along the shaving direction X of the outer blade 8, The forward / backward swing mechanism performs a turning motion (relative movement of the outer cutter 8 with respect to the grip portion 2) about an axis along the reciprocating direction Y of the inner cutter of the outer cutter 8. That is, a left / right swing mechanism and a front / rear swing mechanism (not shown) also correspond to the outer blade driving means.

  Next, the net blades 9, 10, and 12 according to the present embodiment will be described in detail.

  In the present embodiment, the net blades 9, 10, and 12 have a large number of blade holes 40 defined by the crosspieces 37. Specifically, as shown in FIG. 5, the crosspiece 37 includes a short-side crosspiece 39 extending in a wavy shape along the short-side direction (front-rear direction) X and a long-side direction (left-right direction) Y. Existing longitudinal bars 38a and 38b. These crosspieces 39, 38a, 38b define a substantially hexagonal blade hole 40 in plan view. The blade hole 40 is formed in a size that allows body hair to be inserted.

  Further, as described above, the net blades 9, 10, and 12 are formed in a curved shape in an inverted U shape when viewed from the side, and the top portions 9a, 10a, and 12a positioned at the highest portion are formed on the skin surface. This is the part where the contact pressure increases. And outer part 9b, 10b, 12b located in the outer side of the transversal direction of top part 9a, 10a, 12a is a site | part where contact pressure with a skin surface becomes smaller than top part 9a, 10a, 12a.

  Moreover, the longitudinal bars 38a having the cross-sectional shape shown in FIG. 6 are arranged at the top portions 9a, 10a, and 12a, and the longitudinal bars 38b shown in FIG. 7 are arranged at the outer portions 9b, 10b, and 12b. Yes. In addition, the dashed-dotted line in FIG. 5 is a centerline which passes along the center of the transversal direction of the top parts 9a, 10a, and 12a.

  As shown in FIGS. 6A and 6B, the longitudinal bar 38a is formed in a substantially flat plate shape in cross section, and the short side end (raised portion) 41 of the longitudinal bar 38a has a radius of curvature R1. It is formed in a semicircular cross section. This R1 is preferably 10 μm, for example. Here, the surface 43 of the short-side bar 39 is closer to the skin side than the surface 42 of the long-side bar 38a, and the vertical distance between the surface 42 of the long-side bar 38a and the surface 43 of the short-side bar 39 is L1. Is set to

  On the other hand, the longitudinal bar 38b is formed in a substantially U-shaped cross section as shown in FIG. Specifically, the short direction center 46 is formed in a flat surface, and a bent portion 45 is provided that bends upward and extends from the short direction center 46 toward both ends in the short direction. It has a tapered raised portion 45a. These raised parts 41 and 45a have an action of causing body hair having a small angle with the skin surface.

  Further, the upper surface of the bent portion 45 is an inclined upper surface 47, and the lower surface is an inclined lower surface 48. In other words, the longitudinal bar 38 b is defined by the short direction center 46, the inclined upper surface 47, the inclined lower surface 48, and the bottom surface 49. Further, the vertical distance between the short-side end 44 of the bent portion 45 and the surface 43 of the short-side bar 39 is set to L2, and is offset by a magnitude relationship of L2 <L1. The difference between L1 and L2 is preferably 10 μm, for example.

  Further, as shown in FIG. 7B, the short-side end 44 of the bent portion 45 is formed in a semicircular cross section having a radius of curvature R2, and is set to have a magnitude relationship of R2 <R1. R2 is preferably 3 μm, for example. Here, the clearance angle α between the reference line 50 in the short direction indicated by the two-dot chain line and the inclined upper surface 47 is the reference of the surface 42 of the longitudinal bar 38a and the reference in the short direction as shown in FIG. It is set larger than the clearance angle (0 °) formed with the line 50. That is, in the longitudinal bars 38a, 38b according to the present embodiment, the longitudinal bars 38a arranged at the top portions 9a, 10a, 12a are not provided with a clearance angle, and the longitudinal directions arranged at the outer portions 9b, 10b, 12b. The crosspiece 38b has a clearance angle.

  As shown in FIGS. 8 and 9, the longitudinal end portion 52 of the longitudinal rail 38 b extends in a substantially straight section from the side wall surface 51 of the short-side rail 39 in the longitudinal direction. And the central portion 53 in the longitudinal direction are connected by being gently curved via a boundary portion 54. The radius of curvature of the boundary 54 is preferably 10 μm, for example.

  Thus, in this embodiment, as shown in FIG. 3, it is a bar extended in the direction which intersects with the relative movement direction (arrow a direction of FIG. 3) with respect to the grip part 2 of the net blades 9, 10, and 12. Raised portions 41 and 45 a are provided on the longitudinal bar 38.

  Further, in the present embodiment, the short side end (raised portion) 41 of the longitudinal bar 38a is formed in a semicircular cross section having a radius of curvature R1, and the surface 42 of the longitudinal bar 38a and the lateral bar 39 are The vertical distance from the surface 43 is set to L1. On the other hand, the raised portion 45a of the longitudinal beam 38b is formed in a semicircular cross section having a radius of curvature R2 smaller than the radius of curvature R1, and the short direction end 44 of the bent portion 45 and the surface 43 of the short direction beam 39 The vertical distance is set to L2 shorter than L1.

  As described above, in this embodiment, by setting R2 <R1 and L2 <L1, in the areas of the net blades 9, 10, and 12, the portions having high contact pressure with the skin surface (the top portions 9a, 10a, and 12a). The raising force for raising the body hair of the raised portion 41 is set to be smaller than the raising force of the raised portion 45a provided in the portion (outer portions 9b, 10b, 12b) where the contact pressure is low.

  The raised portions 41 and 45a are provided at both ends of the direction X (short direction) X orthogonal to the extending direction Y of the longitudinal bars 38a and 38b. The raised portions of the outer portions 9b, 10b and 12b (the raised portions provided at least in the portions of the raised portions 41 and 45a where the contact pressure of the outer blade is low) 45a are the bottom surfaces of the longitudinal bars 38b (on the inner blade side). In a state where the (surface) 49 is downward, the bottom surface (surface on the inner blade side) 49 is tapered to be inclined upward as it goes to both ends in the short direction X.

  As described above, in the present embodiment, the longitudinal length which is a bar extending in a direction intersecting the relative movement direction (direction of arrow a in FIG. 3) of the net blades (outer blades) 9, 10, 12 with respect to the grip portion 2. Raised portions 41 and 45 a are provided on the direction bar 38. Therefore, when the net blades (outer blades) 9, 10, 12 are moved relative to the grip portion 2, the sleeping hair can be efficiently raised. As a result, it is possible to further improve the performance of introducing the sleeping body hair into the blade holes 40 of the net blades (outer blades) 9, 10, 12.

  It should be noted that the rail provided with the raised portion may extend in a direction intersecting the relative movement direction of the outer blade with respect to the grip portion, but has a large intersection angle with the relative movement direction (the relative movement direction and the extension of the rail). It is more preferable that the acute angle formed with the current direction is large). Therefore, when the outer cutter 8 reciprocates in the direction of the arrow a as in the present embodiment, as shown in FIG. 3, the short blade directional bar 39 is provided in a portion 39a having a large intersection angle with the direction of the arrow a. Then, when the outer blade moves relative to the grip portion, the sleeping body hair can be raised more efficiently.

  The extending direction (longitudinal direction) Y of the longitudinal bar 38 intersects the relative movement direction (direction of arrow a in FIG. 3) with respect to the grip portion of the outer blade, and the shaving direction (short direction) of the electric razor 1. Crosses X.

  Therefore, if the raised portions 41 and 45a are provided on the longitudinal bars 38 as in the present embodiment, the shaver direction of the electric razor 1 is shaved when shaving the body hair in addition to raising by the relative movement of the outer blade with respect to the grip portion. Also when moved, the sleeping hairs can be raised by the raised portions 41 and 45a.

  Moreover, according to this embodiment, the body hair in a region where the contact pressure between the net blades (outer blades) 9, 10, 12 and the skin surface is high among the areas of the net blades (outer blades) 9, 10, 12 is raised. The raising force to make is set smaller than the raising force in the part where contact pressure is low.

  In this way, the effect of damage on the skin surface due to the portion with high contact pressure with the skin surface is reduced by making the brushing force of the portion with high contact pressure with the skin surface smaller than that with the portion with low contact pressure. ) Can be suppressed.

  Moreover, about the site | part with a low contact pressure with a skin surface, since the influence which it has on a skin surface is low originally, raising hair force can be raised and efficient raising can be performed.

  Furthermore, during rough shaving with a relatively low pressing force, since the contact pressure with the skin of the raised portion 45a having a high raising force is low, it is possible to suppress the deterioration of the slipperiness of the skin, and during finishing shaving. When such a relatively high pressing force is applied, the raised portion 45a having a high raising force acts to raise the sleeping body hair and improve the introduction performance of the outer blade 8 into the blade hole 40. There is also an advantage (see FIG. 16).

  Further, according to the present embodiment, the crosspieces extend in the short direction intersecting with the longitudinal crosspieces 38a and 38b extending along the longitudinal direction of the net blades (outer blades) 9, 10, and 12. It consists of a transverse bar 39 extending along the net, and net blades (outer blades) 9, 10, and 12 have a mesh shape. Therefore, it is easy to insert body hair into the blade hole 40, and there is an effect that the body hair can be easily shaved.

  In addition, according to the present embodiment, the net blades (outer blades) 9, 10, and 12 are formed in an inverted U shape when viewed from the side, and the raised portions 41 and 45a are connected to the net blade (outer blades). The blades 9, 10, 12 are formed at both ends of the longitudinal bars 38 a, 38 b in the short direction. For this reason, even if the electric razor 1 is moved in one of the short direction and the other direction, the hair can be erected, so that there is an effect that the user's convenience is improved.

  Further, according to the present embodiment, the raised portions of the outer portions 9b, 10b, and 12b (the raised portions provided at least in the portions of the raised portions 41 and 45a where the contact pressure of the outer blade is low) 45a are connected to the longitudinal bars 38b. In the state where the inner blade side surface is downward, the inner blade side surface is tapered so as to incline upward toward both ends in the lateral direction X. In this way, the raised portion 45a can be formed in a simple shape by forming the raised portion 45a by making the end in the short-side direction tapered (tapered shape). Further, the raised portion 45a is tapered so that the surface on the inner blade side is inclined upward as the inner blade side faces both ends in the short direction X, thereby raising the raising angle (the angle formed by the direction in which the body hair extends and the skin surface). Small body hairs can be prevented from sinking between the raised portions 45a and the skin, and sleeping body hairs can be raised more reliably.

  Then, the curvature radius R1 of the short direction end (raised portion) 41 of the longitudinal beam (longitudinal beam at a portion where the contact pressure between the outer blade and the skin surface is high) 38a is set to the longitudinal beam (outer blade and skin surface). Is set to be larger than the radius of curvature R2 at the end in the short-side direction of the longitudinal beam 38b at the portion where the contact pressure is low. As described above, the curvature radius R1 at the short-side end of the portion where the contact pressure with the skin surface is high is larger than the curvature radius R2 at the short-side end of the portion where the contact pressure is low, thereby making contact with the skin surface. The influence (damage) which a site | part with a high pressure has on a skin surface can be suppressed more reliably.

  Moreover, according to this embodiment, the surface of the short direction end 41 and the surface 43 of the short direction crosspiece 39 of the longitudinal direction crosspiece (longitudinal crosspiece in the part where the contact pressure between the outer blade and the skin surface is high) 38a. The distance L1 is larger than the distance L2 between the surface of the short-side end 44 of the longitudinal rail (longitudinal rail at a portion where the contact pressure between the outer blade and the skin surface is low) 38b and the surface 43 of the lateral rail 39. It is set. If it carries out like this, the influence (damage) which the longitudinal direction crosspiece 38a in a site | part with a high contact pressure with a skin surface has on a skin surface can be suppressed.

  Further, according to the present embodiment, the entire cross-sectional shape of the longitudinal bar 38b is formed in a substantially U shape, the clearance angle α with respect to the short direction 50 is provided on the surface of the bent portion 45, and the contact pressure with the skin surface Is set smaller than the clearance angle α at the portion where the contact pressure with the skin surface is low. For this reason, the influence (damage) which the site | part with a high contact pressure with a skin surface has on a skin surface can be suppressed.

  Further, according to the present embodiment, the longitudinal end portion 52 of the longitudinal crosspiece 38b is formed in a substantially linear cross section, and the bent portion 45 is provided in the longitudinal central portion 53, and the longitudinal end portion 52 and the longitudinal direction are provided. The boundary portion 54 with the central portion 53 is gently curved and connected. In this way, the net blades (outer blades) 9, 10, and 12 are connected to the skin surface by gently connecting the boundary portion 54 between the longitudinal end portion 52 and the longitudinal central portion 53 of the longitudinal rail 38b. When moved along the top, the influence (damage) of the boundary portion 54 on the skin surface can be suppressed.

  In the present embodiment, the relative movement of the outer cutter 8 in the direction of the arrow a with respect to the grip portion 2 is illustrated, but the relative movement of the outer cutter with respect to the grip portion is not limited to this.

  Hereinafter, the relative movement other than the direction of the arrow a will be described.

  First, as shown in FIG. 10, when the outer blade 8A reciprocates in the shaving direction X with respect to the grip portion 2, as in the above embodiment, the longitudinal bar (crossing the relative movement direction of the outer blade with respect to the grip portion). It is only necessary to provide a raised portion on the crosspiece 38 extending in the direction of the movement. If it carries out like this, in the case of relative movement with respect to the grip part 2 of the outer blade 8A, it becomes possible to raise the sleeping body hair efficiently.

  Further, as shown in FIG. 11, when the outer blade 8B reciprocates in the reciprocating direction Y of the inner blade with respect to the grip portion 2, a short direction bar (a direction intersecting the relative movement direction of the outer blade with respect to the grip portion). A raised portion may be provided on the crosspiece 39). If it carries out like this, in the relative movement with respect to the grip part 2 of the outer blade 8B, the sleeping body hair can be efficiently raised now.

  In addition, as shown in FIG. 12, when the outer cutter 8 </ b> C revolves around the axis C <b> 1 along the direction Z substantially perpendicular to the reciprocating direction Y and the shaving direction X of the inner cutter with respect to the grip portion 2, The raised portions may be provided on the direction bars 38 and the short direction bars 39 (the bars extending in a direction intersecting the circumference centered on the axis C1). If it carries out like this, when the outer blade 8C carries out the turning motion centering on the axis | shaft C1 with respect to the grip part 2, it will become possible to raise a body hair irrespective of the sleeping direction.

  As shown in FIG. 13, when the outer cutter 8D pivots about the axis C2 along the reciprocating direction Y of the inner cutter 17, as in the above-described embodiment, the longitudinal bar (the grip portion of the outer cutter) is used. A raised portion may be provided on the crosspiece 38) extending in a direction intersecting the relative movement direction with respect to. If it carries out like this, in the case of relative movement with respect to the grip part 2 of the outer blade 8D, it becomes possible to raise the sleeping body hair efficiently.

  Moreover, if the raising force of the site | part with a high contact pressure with a skin surface is made smaller than the raising force of the site | part with a low contact pressure like the said embodiment, the outer blade 8D will be in the reciprocating direction Y of the inner blade 17. FIG. Even when a turning motion is performed about the axis C2 along, the influence (damage) exerted on the skin surface by a portion having a high contact pressure with the skin surface can be suppressed. Furthermore, the raising part with high raising force provided in the site | part with a low contact pressure can be made to act on skin effectively by the turning motion centering on the axis | shaft C2 of the outer blade 8D.

  Further, as shown in FIG. 14, when the outer blade 8E pivots around the axis C3 along the shaving direction X with respect to the grip portion 2, a short-direction bar (relative movement direction of the outer blade with respect to the grip portion and A raised portion may be provided on the crosspiece 39 extending in the intersecting direction. If it carries out like this, in the relative movement with respect to the grip part 2 of the outer blade 8E, the sleeping body hair can be efficiently raised now.

  Moreover, when using the outer blade 8E curved in an inverted U-shape when viewed from the front, the raising force of the raised portion provided on the top portion 8Ea, which is a portion having a high contact pressure with the skin surface, is applied at a portion where the contact pressure is low. You may make it smaller than the raising force of the raising part provided in a certain outer side part (left-right direction Y both ends) 8Eb. If it carries out like this, the influence (damage) which the site | part with a high contact pressure with a skin surface has on a skin surface can be suppressed.

  As shown in FIG. 15, when the outer cutter 8F reciprocates in the direction (vertical direction) Z substantially perpendicular to the reciprocating direction Y and the shaving direction X of the inner cutter with respect to the grip portion 2, an inverted U shape is obtained. A raised portion may be provided on a longitudinal beam (a beam extending in a direction crossing the vertical direction Z) 38b on the outer side of the outer blade 8F that is curved. If it carries out like this, a raising part will act with the upward movement of the outer blade 8F, and it can raise the sleeping body hair. At this time, if a raised portion having a higher raising force than a portion having a high contact pressure with the skin surface is provided in a portion having a low contact pressure with the skin surface, the portion (top) having a high contact pressure with the skin surface. Can suppress the influence (damage) on the skin surface.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made.

  For example, in the above-described embodiment, the longitudinal bars 38a and 38b are exemplified as the longitudinal bars 38, but the shape shown in FIG. 17 may be used, and various other shapes may be used. . Hereinafter, the shape of FIG. 17 will be described.

  As shown in FIG. 17A, the longitudinal bar 71 disposed at the top has a flat upper surface 73 and a raised portion 77 at the lateral end. Further, the opening angle of the taper between the upper surface 73 and the inclined surface 75 is set to β1. On the other hand, as shown in FIG. 17B, the longitudinal rail 79 disposed on the outer side has an upper surface 81 formed flat and a raised portion 85 formed at the lateral end. Further, the opening angle of the taper between the upper surface 81 and the inclined surface 83 is set to β2. The opening angle of the taper is set to a magnitude relationship of β2 <β1, and β1 is preferably 70 °, for example, and β2 is preferably 20 °, for example.

  As described above, the taper opening angle β1 of the short side end of the longitudinal bar 71 at the site where the contact pressure with the skin surface is high is defined as the taper opening angle β1 of the longitudinal bar 79 at the site where the contact pressure is low. By setting the angle larger than the angle β2, the influence (damage) exerted on the skin surface by a portion having a high contact pressure with the skin surface can be suppressed.

  Moreover, in the said embodiment, what provided the raising part in which the raising force was substantially the same was illustrated in the top part including the both ends of the left-right direction Y, but the left-right direction Y center part of the top part, and the left-right direction Y both ends of the top part A raised portion may be provided on the outer blade bar so that the raised force gradually increases with the outer and outer portions.

  Moreover, in the said embodiment, although the thing which made the shape of the top longitudinal bar | burr the cross-section substantially flat plate shape was illustrated, it is not restricted to this, The cross-sectional shape of the longitudinal bar | burr of a top part is convex U shape convex upwards It may be. That is, you may make it not provide a raising part in the top part which is a site | part with a high contact pressure with a skin surface. If it carries out like this, the influence (damage) which the site | part with a high contact pressure with a skin surface has on a skin surface can be suppressed further.

  In the above embodiment, four outer blades are arranged in parallel, but the number of outer blades may be 1 to 3, or 5 or more.

  Further, the above-described plural types of relative movement with respect to the grip portion of the outer blade can be performed independently, or a plurality of types of relative movement can be combined. At this time, the above-described operations and effects may be achieved by appropriately setting the portion of the outer blade bar where the raised portion is provided and the magnitude of the raised force.

  Also, the outer blade, inner blade, and other detailed specifications (shape, size, layout, etc.) can be changed as appropriate.

DESCRIPTION OF SYMBOLS 1 Electric razor 2 Grip part 8 Outer blade 9a, 10a, 12a Top part 9b, 10b, 12b Outer part 17 Inner blade 33 Motor (outer blade drive means)
34 Pinion (outer blade drive means)
35, 36 rack (outer blade drive means)
37 Crosspiece 40 Blade hole 41, 45a, 77, 85 Brushed part

Claims (6)

A grip portion to be gripped by a hand, an outer blade having a blade hole defined by a crosspiece, and an inner blade disposed inward of the outer blade and moving relative to the outer blade to cooperate with the outer blade. An electric razor comprising: an inner blade that works to cut the hair inserted into the blade hole; and an outer blade driving means that moves the outer blade relative to the grip portion;
Of the outer blade crosspieces, the crosspieces extending in a direction intersecting with the direction of relative movement with respect to the grip portion of the outer blade are brought into contact with the body hair when the outer blade moves on the skin surface, and the body hair is applied to the skin surface. An electric razor characterized in that a raised portion for raising is provided. The inner blade is moved relative to the outer blade by reciprocating in a direction substantially orthogonal to the shaving direction,
Relative movement of the outer cutter with respect to the grip portion by the outer cutter driving means is substantially the same as the reciprocating motion in a plane including the reciprocating motion direction and the shaving direction of the inner cutter, the reciprocating motion direction and the shaving direction of the inner cutter. Revolving motion around the axis along the orthogonal direction, reciprocating motion of the inner blade in a direction substantially orthogonal to the reciprocating direction and shaving direction, swiveling around the axis along the reciprocating direction of the inner blade The electric razor according to claim 1, wherein the electric razor is at least one of a movement and a turning movement around an axis along the shaving direction.   The raising force for raising the body hair of the raised portion provided in the portion where the contact pressure between the outer blade and the skin surface is high in the outer blade region is higher than the raising force of the raised portion provided in the portion where the contact pressure is low. The electric shaver according to claim 1 or 2, wherein the electric shaver is also small.   The outer cutter is formed to be curved in an inverted U shape when viewed from the side, the top is a portion where the contact pressure between the outer cutter and the skin surface is high, and the outer portion is the contact pressure between the outer cutter and the skin surface. The electric shaver according to claim 3, wherein the electric shaver is a low part.   The raised portions are provided at both ends of the outer blade in the direction orthogonal to the extending direction of the outer blade, and the raised portions provided at least in the portion of the raised portion where the contact pressure of the outer blade is low 4. A taper shape in which the inner blade side surface is inclined upward as it goes to both ends in a direction orthogonal to the extending direction of the crosspiece with the blade side surface facing downward. Or the electric shaver of Claim 4.   The plurality of outer blades are juxtaposed in the shaving direction, and the inner blades are respectively disposed inside the plurality of outer blades. The electric razor as described in the item.

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