JP2006042896A - Electric shaver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve the shaving without leaving any unshaved part by fitting tightly to a recess beneath a chin and to avoid reducing shaving efficiency by ensuring an area of contact with the skin under a nose or chin. <P>SOLUTION: An electric shaver is provided with a net-like screen 1 and a cutter 2 which slidably comes in contact with the inner surface of the net-like screen 1. The net-like screen 1 forms a convex surface 3 curved in a longitudinal direction. The curvature radius R of the curve in the longitudinal direction is set to be 150 to 350 mm. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electric razor whose blade shape is a convex curved surface curved in the longitudinal direction.

  Conventionally, Patent Documents 1 and 2 disclose electric razors in which the shape of a net-shaped outer blade is curved in the longitudinal direction to form a convex curved surface.

  In the conventional examples shown in Patent Document 1 and Patent Document 2, the net-shaped outer blade fits into the recess under the jaw by curving the shape of the net-shaped outer blade in the longitudinal direction to form a convex curved surface. Like to do.

  However, in the conventional example shown in Patent Document 1 described above, the net-shaped outer blade is curved in the longitudinal direction and also in the lateral direction, and the curvature radius of the convex curved surface curved in the longitudinal direction is 120 mm, The radius of curvature of the convex curved surface curved in the short direction is 17 mm. Thus, since the radius of curvature of the convex curved surface in the longitudinal direction of the net-shaped outer blade is as small as 120 mm, the center portion in the longitudinal direction of the net-shaped outer blade is locally attached to the skin. There is a problem that the contact load on the skin at the center in the longitudinal direction of the net-shaped outer blade becomes larger than the appropriate load, and the skin is attracted when shaving. Since the radius of curvature of the convex curved surface in the longitudinal direction is as small as 120 mm, the contact area between the skin and the net-shaped outer blade at the nose, chin, etc. is lower than that of the net-shaped outer blade that is straight in the longitudinal direction. There is a problem that the shaving range becomes narrow and the shaving efficiency decreases.

  In the conventional example shown in Patent Document 2, the radius of curvature of the convex curved surface in the longitudinal direction of the net-shaped outer blade is as small as about 35 mm. There is a problem that the contact pressure to the skin of the part becomes large and the skin is attracted when shaving, and the radius of curvature of the convex curved surface in the longitudinal direction of the net-like outer blade is too small, so There is a problem that the contact area between the skin and the net-like outer blade decreases, the shaving range becomes narrow, and the shaving efficiency decreases.

  As described above, since both of the conventional examples have a small curvature radius of the convex curved surface in the longitudinal direction of the net-shaped outer blade, there is a problem that the skin is attracted, and that the shaving range is narrowed to reduce the shaving efficiency. .

On the other hand, it is conceivable to increase the radius of curvature of the convex curved surface in the longitudinal direction of the net-shaped outer blade so as to eliminate the sticking during shaving and widen the shaving range. If the radius of curvature of the curved surface is too large, it will not fit in the dent under the chin, and it will not be possible to shave deeply, resulting in a large amount of unshaved material.
Japanese Examined Patent Publication No. 57-53748 JP-A-6-142349

  The present invention has been invented in view of the above-mentioned conventional problems, and can be shaved so as not to leave a shaving by fitting into a dent under the chin, and skin under the nose or chin. It is an object of the present invention to provide an electric razor that secures a contact area with the razor and does not reduce shaving efficiency.

  In order to solve the above-described problems, an electric shaver according to the present invention includes a net-like outer blade 1 and an inner blade 2 that is in sliding contact with the inner surface of the net-like outer blade 1. A convex curved surface 3 curved in the longitudinal direction is formed, and the curvature in the longitudinal direction is characterized in that the radius of curvature R is 150 mm to 350 mm.

When shaving with a blade-shaped outer blade 1 having a convex curved surface 3 formed in the longitudinal direction, if the radius of curvature R of the convex curved surface 3 along the longitudinal direction of the net-shaped outer blade 1 is small, The contact area between the skin and the net-shaped outer blade 1 in the chin and chin is reduced, the shaving efficiency is lowered, and if the radius of curvature R is large, the chin will not fit under the chin. In the invention, as described above, by setting the curvature radius R of the convex curved surface 3 curved in the longitudinal direction to 150 mm to 350 mm,
The convex curved surface 3 fits into the dent under the chin to ensure an appropriate contact pressure, and the contact area between the skin and the net-like outer blade 1 is secured under the nose and chin, thereby widening the range. You can shave efficiently without leaving any shaving.

  Moreover, it is preferable that the net-shaped outer blade 1 bends so that the central portion in the short direction is convex even in the short direction, and the curvature radius of the short direction is 1.5 mm to 3.5 mm. .

  By setting it as such a structure, the curvature radius of the transversal direction of the net-shaped outer blade 1 can be made into an optimal curvature radius from a contact pressure with skin, and a contact area, and a favorable shaving can be performed.

  Further, it is preferable that a plurality of net-shaped outer blades 1 are arranged in parallel in the short direction of the net-shaped outer blade 1.

  By setting it as such a structure, it will shave while extending skin with the some outer blade 1, and the cutting effect by the net-shaped outer blade 1 curved in the longitudinal direction will further improve.

  Further, the head portion 4 is provided so as to protrude from one end portion of the grip portion 5 in the longitudinal direction, and a plurality of net-like outer blades 1 are arranged in the short direction of the net-like outer blade 1 on the protruding front end surface of the head portion 4. It is preferable that the angle formed by the grip portion 5 and the head portion 4 is set to be an obtuse angle when viewed from the same direction as the longitudinal direction of the net-like outer cutter 1.

  With such a configuration, when the grip portion 5 is grasped by hand and the plurality of net-shaped outer blades 1 are pressed against the skin, among the plurality of net-shaped outer blades 1 arranged in parallel in the short-side direction. Since the net-like outer blade 1 on one end side in the short direction is in close contact with the skin and the contact pressure is high, the net-like outer blade 1 with the higher contact pressure is short so that the head becomes the head. When moving in the hand direction, the effect of stretching the skin is improved, and by shaving while stretching the skin, the wrinkles can be squeezed and cut while raising, and can be shaved up shortly.

  Moreover, it is preferable that the plurality of net-shaped outer blades 1 be floatable.

  By adopting such a configuration, the net-shaped outer blade 1 moves up and down with respect to the unevenness of the skin, and the contact state between the skin and the net-shaped outer blade 1 is stable and good shaving can be performed.

  Further, an elastic push-up force is applied to each of the plurality of net-like outer blades 1 by a spring so that each net-like outer blade 1 can float freely, and the elastic push-up force applied to the plurality of net-like outer blades 1 is different. Preferably.

  By adopting such a configuration, in a state where a plurality of net-shaped outer blades 1 are pressed against the skin, the net-shaped outer blade 1 with the larger elastic push-up force moves in the short direction so as to be at the head. By doing so, the effect of extending the skin is improved, and by shaving while stretching the skin, the folds can be squeezed out and raised while raising, so that deep shaving can be effectively performed.

  Moreover, it is preferable to make the space | interval between the net-shaped outer blades 1 into the dimension of 0.5 times-2 times the curvature radius of the transversal direction of this net-shaped outer blade.

  With such a configuration, when shaving while moving in the short-side direction with a plurality of net-shaped outer blades 1 pressed against the skin, the sleeping hair is raised and the wrinkles are squeezed out. Can be shaved short.

  Moreover, it is preferable to arrange the slit outer blade 11 between the net-shaped outer blade 1 and the net-shaped outer blade 1.

  By adopting such a configuration, it becomes easy to catch long wrinkles with the slit outer blade 11 and the contact pressure between the slit outer blade 11 and the skin does not increase so much, so that the contact between the net-like outer blade 1 and the skin is increased. Without damaging the pressure greatly, it is possible to squeeze out and shave.

  Further, a slit outer blade 11 is disposed between the net-shaped outer blade 1 and the net-shaped outer blade 1, and elastic lifting force is applied to the net-shaped outer blade 1 and the slit outer blade 11 on both sides by springs. Thus, each net-shaped outer blade 1 and slit outer blade 11 can be floated freely, and the elastic lifting force of one of the net-shaped outer blades 1 on both sides is applied to the other net-shaped outer blade 1 and slit outer blade 11. It is preferable to make it larger than the elastic lifting force applied to each.

  By adopting such a configuration, in a state where a plurality of net-shaped outer blades 1 are pressed against the skin, the net-shaped outer blade 1 with the larger elastic push-up force moves in the short direction so as to be at the head. By doing so, the effect of extending the skin is improved, and by shaving while stretching the skin, the folds can be squeezed out and raised while raising, so that deep shaving can be effectively performed.

  Moreover, it is preferable that the height position of the longitudinal center part of the slit outer blade 11 is lower than the height position of the longitudinal center part of the net-shaped outer blades 1 on both sides.

  With such a configuration, the contact pressure between the slit outer blade 11 and the skin does not increase, the contact pressure between the net-like outer blade 1 and the skin is not impaired, and the wrinkles are squeezed more effectively. Deep shaving is possible.

  The slit outer blade 11 is curved in the longitudinal direction to form a convex curved surface 11a, and the radius of curvature of the convex curved surface 11a of the slit outer blade 11 is larger than the radius of curvature of the convex curved surface 3 of the net-like outer blade 1 in the longitudinal direction. Is also preferably large.

  By adopting such a configuration, the contact pressure between the slit outer blade 11 and the skin is reduced, the contact pressure between the net-like outer blade 1 and the skin is not impaired, and the wrinkles are squeezed more effectively. Shaving is possible.

  The longitudinal direction of the net-like outer blade 1 is defined as the left-right direction, and the head portion 4 that holds the outer blade 1 and the inner blade 2 is preferably configured to be rotatable left and right with respect to the grip portion 5. .

  With such a configuration, when the grip portion 5 is grasped by hand and the outer blade 1 is pressed against the skin, the convex curved surface 3 curved in the longitudinal direction according to the pressing direction of the outer blade 1 against the skin, The head portion 4 with the outer blade 1 is rotated with respect to the grip portion 5 and the convex curved surface 3 follows the skin and inclines in a direction adapted to the skin, and can be shaved effectively. Of course, it is possible to shave while smoothly moving the outer cutter 1 in the short direction while the convex curved surface 3 is made to follow the skin and tilted in a direction that fits the skin. The head portion 4 having the outer cutter 1 having a convex curved surface 3 rotates with respect to the grip portion 5, so that a part of the head portion 4 does not partially bite into the skin. The longitudinal direction of the outer cutter 1 with the outer cutter 1 having a convex curved surface 3 in the direction fitted to the skin Shaving while moving smoothly, or shaving by turning the outer blade 1 against the skin with the outer blade 1 having a convex curved surface 3 in the longitudinal direction fitted to the skin It is possible to perform shaving while smoothly moving the outer blade 1 in all directions while the outer blade 1 is pressed against the skin, and the shaving efficiency is improved. In particular, since the outer cutter 1 has a convex curved surface 3 in the longitudinal direction, the outer cutter 1 can be fitted into the recess under the chin, and thus the outer cutter 1 is fitted in the recess under the chin, As described above, the outer blade 1 is moved in the longitudinal direction or the short-side direction to be shaved, or the outer blade 1 is rotated with respect to the skin while the outer blade 1 is fitted in the recess under the chin. It is possible to move and shave, and to efficiently shave and shave against various hair flows under the jaw, and the shaving efficiency is remarkably improved.

  Moreover, it is preferable to make the magnitude | size of the blade hole of the center part of the longitudinal direction of the net-shaped outer blade 1 smaller than the blade hole of the edge part of a longitudinal direction.

  By adopting such a configuration, the contact pressure distribution between the skin and the net-like outer blade 1 becomes higher at the central portion in the longitudinal direction due to the curvature in the longitudinal direction of the net-like outer blade 1, but this contact pressure is higher. It is possible to obtain optimum shaving performance at each part in the longitudinal direction of the net-like outer blade 1 by making the size of the blade hole at the central portion in the high longitudinal direction smaller than the blade hole at the end portion in the longitudinal direction. it can.

  Moreover, it is preferable to make thickness in the center part of the longitudinal direction of the net-shaped outer blade 1 larger than the thickness of the edge part of a longitudinal direction.

  By adopting such a configuration, the contact pressure distribution between the skin and the net-like outer blade 1 becomes higher at the central portion in the longitudinal direction due to the curvature in the longitudinal direction of the net-like outer blade 1, but this contact pressure is higher. By making the thickness at the central portion in the high longitudinal direction larger than the thickness at the end portion in the longitudinal direction, optimum shaving performance can be obtained at each site in the longitudinal direction of the net-like outer blade 1.

  Moreover, it is preferable that the inner blade 2 that is in sliding contact with the inner surface of the net-shaped outer blade 1 is formed by bending one sheet metal.

  Thus, by bending one sheet metal, the inner blade 2 can be configured relatively inexpensively.

  Moreover, it is preferable that the front-end | tip of the blade part of the inner blade 2 which slidably contacts with the inner surface of the net-shaped outer blade 1 is made into an acute angle.

  By setting it as such a structure, since cutting resistance reduces, sharpness improves.

  Moreover, it is preferable that the rigidity of the center part in the longitudinal direction of the inner cutter 2 that is in sliding contact with the inner surface of the net-like outer cutter 1 is larger than the rigidity of the end portion in the longitudinal direction.

  Although the contact pressure is increased at the center portion in the longitudinal direction due to the curvature in the longitudinal direction, the rigidity at the center portion in the longitudinal direction of the inner blade 2 is larger than the rigidity at the end portion in the longitudinal direction. It is difficult to deform at the part, and the sharpness can be prolonged.

  According to the present invention, the radius of curvature R of the convex curved surface curved in the longitudinal direction of the net-shaped outer blade can be set to an optimum radius of curvature, and the convex curved surface can be fitted into the recess under the jaw and the central portion of the net-shaped outer blade. Ensures proper contact pressure without excessively biting into the skin and securing the contact area between the skin and the net-like outer blade under the nose and chin, thereby shaving a wide area There is an advantage that it can be shaved efficiently without leaving.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  An embodiment of the present invention is shown in the accompanying drawings. As shown in FIGS. 1 to 6, the electric razor has a grip portion 5 for gripping by hand, and a hook on a surface opposite to the grip portion 5 that is disposed at one end in the longitudinal direction of the grip portion 5. The head portion 4 has a net-like outer blade 1 for shaving. Here, it is assumed that the end of the grip portion 5 where the head portion 4 is disposed at one end in the longitudinal direction is defined as “upper” and the other end of the grip portion 5 in the longitudinal direction is defined as “lower”. As shown in FIGS. 1, 4, and 6, the head 4 from the upper end of the grip 5 is viewed from the side (that is, viewed from the same direction as the longitudinal direction of the net-like outer blade 1). The head portion 4 is attached so as to be inclined at an obtuse angle (inclined so that the head portion 4 protrudes obliquely forward and upward relative to the grip portion 5). Moreover, the head portion 4 is attached to the grip portion 5 via a head support block 35 so that the head portion 4 can be rotated (swing) and floated in the vertical direction via a head support block 35 as will be described later. is there.

  First, the head unit 4 will be described. As shown in FIG. 7, the head unit 4 includes a motor 6 made of a linear motor, an inner blade 2, a blade block 7, a head case 8 that houses and holds the motor 6, and a head case cover 9. Since the motor 6 is incorporated in the head portion 4 in this way, the head portion 4 is rotated with respect to the grip portion 5 as will be described later, and the inner blade 2 is driven by the output from the motor 6. This mechanism can be simplified.

  As shown in FIG. 9, the blade block 7 includes a plurality of (two in the embodiment) net blade cassettes 10 provided with a net-shaped outer blade 1, and a comb-like slit disposed between the net blade cassettes 10. And a slit blade cassette 12 having a slit outer blade 11 provided with a rectangular holding member 13. The net-shaped outer blade 1 is long in the reciprocating direction of the inner blade 2 (that is, the reciprocating direction of the inner blade 2 is the longitudinal direction of the net-shaped outer blade 1), and a plurality of net-shaped outer blades 1 The blades 1 are juxtaposed in the short direction so that the longitudinal direction is parallel, and the slit outer blade 11 disposed between the net-like outer blade 1 and the net-like outer blade 1 is also a net-like outer. The direction parallel to the longitudinal direction of the blade 1 is the longitudinal direction. That is, if the vibration direction of the motor 6 made of a linear motor (that is, the reciprocating direction of the inner blade 2) is defined as the left-right direction, the vibration in the left-right direction is transmitted to the inner blade 2 by the driver 22 at the tip. The inner blade 2 is reciprocated in the left-right direction and reciprocated along the longitudinal direction (left-right direction) of the inner surface of the net-shaped outer blade 1 to reciprocate in the blade hole provided in the net-shaped outer blade 1. A slit provided in the slit outer blade 11 is cut while the inner blade 78 of the slit is reciprocated in the left-right direction by the reciprocating motion of the driver 22 and reciprocated while being in sliding contact with the inner surface of the slit outer blade 11. It is designed to cut the bag that has entered. The net-shaped outer blade 1 is for deeply shaving a short heel from the base, and the slit outer blade 11 is for shaving a long heel that is difficult to shave with the net-shaped outer blade 1. Effective shaving. A specific configuration of the blade block 7 will be described later.

  In the following description, as described above, the upper end side of the grip part 5 in the longitudinal direction of the grip part 5 and the other end side of the grip part 5 in the longitudinal direction are arranged on the upper side. “Down”, that is, the vertical direction is defined, the longitudinal direction of the net-shaped outer blade 1 (that is, the reciprocating direction of the inner blade 2) is defined as the left-right direction, and the short direction of the net-shaped outer blade 1 is defined as the front-back direction. It is defined and explained.

  The motor 6 made of a linear motor is inserted into the head case 8 from the upper opening and is internally installed. The motor 6 is mounted in the head case 8 so that the upper case is covered with the head case cover 9 and the driver element. It is fixed with screws 15 through a waterproof rubber 29 and a rubber pressing plate 14.

  The lower side of the motor 6 is fixed to the head case 8 by screwing screws 16 through the lid 97 from below the head case 8. In this way, the motor 6 is housed in the head case 8 and fixed in a state sandwiched between the head case 8 and the head case cover 9, so that the head case 8, the motor 6, the head case cover 9, and the driver waterproof rubber are provided. 29, the rubber pressing plate 14 constitutes a drive block in which the motor 6 is housed in a single waterproof box.

  The lead wire 17 extending from the lower side of the motor 6 is connected to the drive circuit 18 in the grip portion 5 in order to drive the motor 6, and is inserted into the wiring tube 60. 60 is led out of the head case 8 by being fixed to the head case 8 through a hole 19 (see FIG. 6) provided in the bottom of the head case 8 and exposed to the lower side.

  A detachable button spring 20 and a detachable button 21 are attached to both end surface portions in the longitudinal direction (left and right end surface portions) of the head case 8, and the detachable button spring 20 is biased outward by the detachable button spring 20. Yes.

  A drive element 22 of the motor 6 protrudes from a hole in the center of the upper surface of the head case cover 9. The drive element 22 is provided with a slit drive rod 23 and a trimmer drive rod 24, and an inner blade push-up spring 25 is a spring stopper. The inner blade 2 is coupled to the driver 22 in a state where the inner blade 2 is urged upward by the inner blade push-up spring 25.

  In the lower end portion of the head case 8, grooves 28 that are long in the front-rear direction are provided at two positions on the left and right when viewed from the front. The pair of left and right grooves 28 are constituent elements of the blade head side connecting portion B for rotatably connecting one end portions of the pair of connecting members 36 to the head portion 4 as will be described later.

  As described above, the blade block 7 includes the net blade cassette 10 having the net-like outer blade 1, the slit blade cassette 12 having the slit outer blade 11, and the net blade cassette 10 in order from the front to the rear. Each cassette is configured to be mounted on the holding member 13, and each of these cassettes is held by the holding member 13 so as to be independently movable up and down, and this holding member 13 is attached to the head case 8. .

  As shown in FIG. 9, the net blade cassette 10 is configured by attaching an outer blade frame 70 to which a net-shaped outer blade 1 is fixed to a cover member 71. In the case of a substantially U-shape, one side in the upper, lower and front / rear directions is open, and a locking groove 73 is formed on the inner surface facing the left and right of the upper part of the left and right sides. The outer cutter frame in which the net-like outer cutter 1 is fixed as shown in FIG. 10 by engaging the locking portions 70a provided at the left and right ends of the outer cutter frame 70 with the locking groove 73 of the cover member 71. 70 is attached to the cover member 71, and the net-like outer blade 1 is located in the upper opening of the cover member 71 in this attached state. In addition, a recess 72 is formed in the upper part of the left and right ends of the cover member 71 so as to open to one side in the lower and front-rear directions. The recess 72 on both the left and right sides crosses the recess 72 in the left-right direction. A connecting piece 74 is installed on the connecting piece 74, and a vertical groove 74a is provided in the connecting piece 74 in the vertical direction. Further, a protrusion 72 a is provided on the opposite surface of the recess 72 in the left-right direction. The outer blade frame 70 is provided with an engaging projection 75 projecting from a side surface facing the slit blade cassette 12 side, which will be described later, toward the slit blade cassette 12 side. A spring receiving projection 75a projects from the side surface projecting 75 toward the slit blade cassette 12 side.

  As shown in FIGS. 9 and 11, the slit blade cassette 12 includes a slit outer blade body 77 in which support portions 76 are fixed to the left and right ends of the slit outer blade 11, and a slit inner blade 78 in which a joint member 79 is fixed to the slit inner blade 78. The blade body 80 is configured in combination, and the inner slit body 80 is incorporated so as to be movable in the longitudinal direction with respect to the outer slit body 77, and is further interposed between the joint member 79 and the support portion 76. The slit inner blade 78 is elastically contacted with the slit outer blade 11 by the spring 81, and the slit inner blade 78 is configured to slide in the left-right direction while being elastically contacted with the slit outer blade 11. . A cover piece 82 is provided obliquely downward from an upper end on the outer side in the left-right direction of the support portion 76, and the support portion 76 faces downward on the inner side in the left-right direction of the cover piece 82 so as to face the cover piece 82. A locking piece 83 protrudes, and the locking piece 83 and the cover piece 82 are integrally connected by a vertical rib 84. A hooking claw 83 a is provided at the lower end of the locking piece 83. Further, a spring receiving hole 93 that opens downward is provided on the inner side of the support portion 76 in the left-right direction with respect to the locking piece 83, and further, on the front and rear surfaces on the inner side of the spring receiving hole 93 of the support portion 76. A protrusion receiving step 91 is provided. Further, the joint member 79 is provided with a drive rod fitting recess 85 into which the slit drive rod 23 is fitted so as to be movable up and down.

  As shown in FIGS. 9 and 10, the holding member 13 has a rectangular frame shape, and has a longitudinal groove for attaching an outer blade that is long in the vertical direction and is opened upward and laterally at the front and rear portions of both ends in the lateral direction. 86 is formed, and a slit groove mounting longitudinal groove 87 that is open in the upper and left and right directions is formed between the outer blade mounting longitudinal grooves 86. The outer blade attaching vertical grooves 86 at the front and rear portions have outer blade retaining claws 88 formed on the inner surfaces facing the front and rear of the upper end portion, and the outer blade retaining members at both ends in the left-right direction of the holding member 13 are formed. Slit blade extraction claw portions 89 are formed on inner surface portions on both sides of the claw portion 88 for use. Furthermore, attachment locking holes 90 are provided at both left and right ends of the holding member 13.

  In order to assemble the net blade cassette 10 to the holding member 13, the connecting piece 74 of the cover member 71 is held in the left and right recesses 72 of the cover member 71 so as to be inserted into the outer blade attaching vertical groove 86 of the holding member 13. The left and right wall portions of the member 13 are inserted slidably in the vertical direction. At this time, the connecting piece 74 inserted in the outer blade attaching vertical groove 86 has an outer blade retaining pawl 88 inserted in the vertical groove 74a, and the cover member 71 slides up and down with respect to the holding member 13. When the outer blade retaining pawl 88 reaches the end of the vertical groove 74a, it cannot slide any further and is prevented from coming off. Moreover, the protrusion 72a provided in the left-right direction opposing surface of the recess 72 of the cover member 71 is arrange | positioned so that the side wall of the edge part of the left-right direction of the holding member 13 may be pinched | interposed from the inside and outside.

  In order to assemble the slit blade cassette 12 to the holding member 13, the left and right wall portions of the holding member 13 are slid vertically in the vertical ribs 84 of the support portion 76 to the slit blade mounting vertical grooves 87 of the holding member 13. Insert freely. At this time, the hooking claw portion 83 a of the locking piece 83 of the support portion 76 can be engaged with the slit blade retaining claw portion 89 of the holding member 13 from below, so that the slit blade cassette 12 is in contact with the holding member 13. If it slides for a certain length, it will be prevented from slipping further and will be prevented from coming off.

  Further, the pair of net blade cassettes 10 attached to the holding member 13 and the slit blade cassette 12 as described above are the spring receiving protrusions 75a of one net blade cassette 10 (the previous net blade cassette 10 in the figure). And a spring receiving hole 93 of the slit blade cassette 12 are interposed between the blade receiving push-up springs 92 and the engaging projections 75 of the pair of net blade cassettes 10 are protrusion receiving step portions of the slit blade cassette 12. 91 can be elastically locked from above. That is, the slit blade cassette 12 is elastically pushed upward with respect to the net blade cassette 10 by the urging of the double blade connecting push-up spring 92, and the engaging protrusion 75 is elastically contacted with the protrusion receiving step 91. Further, the slit blade cassette 12 is prevented from moving upward with respect to the net blade cassette 10, but in a state where the slit blade cassette 12 is pushed upward by the connecting push-up spring 92, When the pressing force is applied, the slit blade cassette 12 can slide downward relative to the net blade cassette 10 against the spring force of the double blade connecting push-up spring 92. As described above, the slit blade cassette 12 is float-supported so as to be slidable in the vertical direction with respect to the net blade cassette 10 while receiving the spring force of the connecting push-up spring 92.

  As shown in FIG. 5, the blade block 7 having the above-described configuration is configured such that the attachment locking hole 90 of the holding member 13 is detachably engaged with the attachment claw 21 a provided on the attachment / detachment button 21, thereby The holding member 13 is attached to the head case cover 9 attached to the head case 8, whereby the blade block 7 is attached to the head case 8 side, and the head portion 4 is assembled.

With the head portion 4 assembled and configured as described above, the inner blade 2 is elastically pressed against the net-like outer blades 1 of the front and rear net blade cassettes 10 by the inner blade push-up springs 25, respectively. Is pushed upward, the outer blade retaining claw portion 88 is in contact with the end portion of the vertical groove 74a, and the slit blade cassette 12 has a lower end on the spring receiving projection 75a of the net blade cassette 10 positioned forward in the front-rear direction. Are supported by the double blade connecting push-up spring 92, and the hooking claw portion 83a of the slit blade cassette 12 is engaged with the slit blade retaining claw portion 89 of the holding member 13 from below. In this state, push-up force of the upward (elastic pushing force of the spring) and Q ₁ with respect to the holding member 13 of the spring receiving net blade cassette 10 side having no protrusion 75a (net blade cassette 10 after in the embodiment) , push-up force (in the embodiment before net blade cassette 10) net blade cassette 10 towards having a spring receiving protruding portion 75a upward against the holding member 13 (elastic by a spring pushing force) and Q _2, the slit blade cassette upward force upward with respect to the holding member 13 of the 12 (elastic pushing force of the spring) and _{Q 3} (the _{Q 1,} Q 2, _{Q 3} is shown in FIG. 6), _further, the Q 1> _{Q 3,} Also, assuming that the spring force of the inner blade push-up springs 25 mounted on the front and rear inner blades 2 is equal, the net blade cassette 10 having no spring receiving projection 75a is moved by the inner blade push-up spring 25. Since the elastically pushed upward relative to the holding member 13, the push-up force Q ₁ is a push-up force upward by the inner cutter upwardly spring 25. Further, the upward pushing force with respect to the holding member 13 of the slit blade cassette 12 is the upward pushing force by the double blade connecting push-up spring 92. On the other hand, in the net blade cassette 10 having the spring receiving projection 75a, the inner blade push-up spring 25 is elastically pushed upward by the inner blade push-up spring 25, and the blade receiving projection 75a has both blades. A downward force is applied downward by the connecting upward spring 92, and therefore, Q ₂ = Q ₁ −Q ₃ is satisfied. Therefore, in the present invention, Q ₁ > Q ₂ is satisfied. That is, among the front and rear net blade cassettes 10, in the initial state where no external force is applied (the initial state where the external blade is not pressed against the skin), one (the back in the embodiment) net blade cassette 10 is the other (the front in the embodiment) net. The upward pushing force is set to be larger than the blade cassette 10. In the embodiment, Q ₂ and Q ₃ are set to be approximately equal, but Q ₂ > Q ₃ may be satisfied.

  In the configuration as described above, the front and rear net blade cassettes 10 and the slit blade cassette 12 move up and down independently, and therefore the front and rear net blade cassettes 10 and the slit blades positioned in the middle in the front and rear direction. The cassettes 12 can float independently.

  As shown in FIGS. 1, 2, 3, 5, 9, 10 and 10 etc., the net-shaped outer blade 1 is curved in the longitudinal direction (that is, the left-right direction) to form a gently convex curved surface 3. In addition, as shown in FIG. 1, FIG. 2, FIG. 4, FIG. 6, FIG. 9, FIG. The curvature radius of the convex curved surface 3 curved in the longitudinal direction of the net-shaped outer blade 1 is 150 mm to 350 mm.

  In FIG. 14, when the curvature radii of the convex curved surfaces 3 curved in the longitudinal direction of the net-shaped outer blade 1 are different, the net-shaped outer blade under the jaw when the net-shaped outer blade 1 is straight in the longitudinal direction. A graph showing the contact load distribution of 1 is shown. The above graph is obtained by experiment. In the case of R350, (the contact pressure at both ends in the longitudinal direction of the net-shaped outer blade 1) / (at the center in the longitudinal direction of the net-shaped outer blade 1) When the radius of curvature is longer than 350 mm, (contact pressure at both ends in the longitudinal direction of the net-shaped outer blade 1) / (in the central portion in the longitudinal direction of the net-shaped outer blade 1) Contact pressure) is smaller than 1. That is, when the radius of curvature is greater than 350 mm, the contact pressure at the central portion in the longitudinal direction is reduced, and unshaved portions are left in the depressions below the jaws. For this reason, the curvature radius of the convex curved surface 3 curved in the longitudinal direction of the net-shaped outer blade 1 is set to 350 mm or less. Thus, by setting the curvature radius of the convex curved surface 3 to 350 mm or less, the contact pressure at the central portion in the longitudinal direction of the net-like outer blade 1 is obtained with respect to the depression under the jaw, and wrinkles are caused by the skin stretching effect. It is squeezed out and can be shaved short.

  Further, in FIG. 15, when the curvature radii of the convex curved surface 3 curved in the longitudinal direction of the net-shaped outer blade 1 are different from each other, the net in the nose and chin when the net-shaped outer blade 1 is straight in the longitudinal direction. A graph showing the contact width between the outer blade 1 and the skin is shown. As is apparent from this graph, when the radius of curvature R of the convex curved surface 3 curved in the longitudinal direction of the net-like outer blade 1 is reduced in the nose and chin, the contact width with the skin is reduced and the shaving efficiency is greatly reduced. I know that Therefore, when an area where the shaving efficiency is not greatly reduced in actual use was determined by sensory evaluation with 50 monitors, it was found that the area where the shaving efficiency was not greatly reduced in actual use was about 80% of the straight area. That is, it can be seen from FIG. 15 that when the radius of curvature is 150 mm or more, the shaving efficiency in actual use is not greatly reduced.

  Due to the above reasons, the curvature radius of the convex curved surface 3 curved in the longitudinal direction of the net-shaped outer blade 1 is set to 150 mm to 350 mm, so that it fits well under the chin and obtains an appropriate contact pressure, leaving unshaved. It is possible to cut the eyelids effectively, and to secure the contact area between the skin and the net-like outer blade 1 under the nose and chin, which makes it possible to shave efficiently without shaving a wide area. The radius of curvature could be set.

  Further, the net-like outer blade 1 is curved so that the central portion in the short direction is convex even in the short direction, and the curvature radius of the short direction is set to 1.5 mm to 3.5 mm. It has an optimal radius of curvature based on the contact pressure with the skin and the contact area.

  Moreover, in this invention, the space | interval between the front net-like outer blade 1 arranged in parallel in the short side direction (front-rear direction) and the rear net-like outer blade 1 is set in the short direction of the net-like outer blade 1. When the shaving is performed while moving in the short direction with the front and rear net-shaped outer blades 1 pressed against the skin, the size is set to 0.5 to 2 times the radius of curvature. As well as waking up the hair, it is possible to squeeze out the eyelids and shave it short. Here, by disposing the slit outer blade 11 between the front and rear net-shaped outer blades 1 arranged in the short direction through the gap of the above dimensions, it becomes easier to catch the long ridge by the slit outer blade 11, Since the contact pressure between the slit outer blade 11 and the skin does not increase so much, the contact pressure between the net-like outer blade 1 and the skin is not greatly impaired, and the wrinkles can be squeezed and deep shaving can be performed. When the height position of the central portion in the longitudinal direction of the slit outer blade 11 is positioned lower than the height position of the central portion in the longitudinal direction of the front and rear net-shaped outer blades 1, the slit outer blade The contact pressure between the skin 11 and the skin does not increase further, the contact pressure between the net-shaped outer blade 1 and the skin is not impaired, the effect of squeezing out the wrinkles can be further demonstrated, and deep shaving is possible It is.

  The blade hole provided in the net-shaped outer blade 1 having the convex curved surface 3 curved in the longitudinal direction is smaller in the size of the blade hole in the central portion in the longitudinal direction than the blade hole in the end portion in the longitudinal direction. . That is, the contact pressure distribution between the skin and the net-like outer blade 1 becomes higher at the center portion in the longitudinal direction due to the curvature in the longitudinal direction of the net-like outer blade 1, but the contact pressure distribution at the center portion in the longitudinal direction is higher. By making the size of the blade hole smaller than the blade hole at the end portion in the longitudinal direction, the optimum shaving performance can be obtained at each site in the longitudinal direction of the net-like outer blade 1.

  In addition, the thickness of the net-like outer blade 1 in the central portion in the longitudinal direction may be larger than the thickness of the end portion in the longitudinal direction, and thus the thickness in the central portion in the longitudinal direction where the contact pressure is high. By making it larger than the thickness of the end portion in the longitudinal direction, optimum shaving performance can be obtained at each site in the longitudinal direction of the net-shaped outer blade 1.

  Further, in the present invention, the frame end surface portion 10a adjacent to both ends in the longitudinal direction of the net-shaped outer blade 1 in the net blade cassette 10 has a smooth convex curved surface continuous with the net-shaped outer blade 1. Sliding surfaces 27 constituting corners are provided. The width of the sliding surface 27 in the short direction of the net-shaped outer blade 1 is set to 2 mm to 5 mm, and the radius of curvature of the corner of the skin sliding surface 27 is set to 2 mm to 10 mm. In addition to widening the contact surface between the sliding surface 27 and the skin, the skin sliding surface 27 becomes a large and smooth corner shape, so that there is no edge contact, and the pressing load by the net blade cassette 10 is reduced. For these reasons, the skin sliding surface 27 In this way, the net blade cassette 10 can be smoothly slid against the skin and moved in the short direction (front-rear direction) of the net-shaped outer blade 1 with the blade block 7 pressed against the skin. It is possible to smoothly move in the longitudinal direction and rotate.

  The skin slipping surface 27 has been subjected to a graining process, and the skin sliding surface 27 that is a contact portion with the skin becomes minute irregularities by the graining process, thereby reducing the contact area between the skin sliding surface 27 and the skin. The dynamic friction between the skin sliding surface 27 and the skin is reduced, and the sliding performance of the blade block 7 is enhanced.

  The slit outer blade 11 is also curved in its longitudinal direction (left and right direction) to form a gently convex curved surface 11a as shown in FIG. 1, FIG. 2, FIG. 9, FIG. The radius of curvature of the convex curved surface 11a is larger than the radius of curvature of the convex curved surface 3 in the longitudinal direction of the net-shaped outer blade 1, and the contact pressure between the slit outer blade 11 and the skin does not increase. Without damaging the contact pressure between the net-like outer cutter 1 and the skin, the wrinkles are squeezed out and deep shaving is possible.

  By the way, the inner blade 2 that is in sliding contact with the inner surface of the net-shaped outer blade 1 in the present invention is formed by punching one sheet metal 99 as shown in FIG. The sheet metal 99 is bent so as to bend in both the longitudinal direction and the short direction as shown in FIGS. 16 (a) and 16 (b), and the net-shaped outer blade 1 curved in the longitudinal direction and the short direction. An inner blade 1 that is in sliding contact with the inner surface is formed. By bending one sheet metal in this manner, the inner blade 2 curved in the longitudinal direction and the short direction can be formed, so that the inner blade 1 curved in the longitudinal direction and the short direction can be formed relatively inexpensively. can do.

  The tip of the blade portion 98 of the inner blade 2 formed by processing the one sheet metal 99 is formed at an acute angle as shown in FIG. 16C to reduce cutting resistance and improve sharpness. Yes. The inner blade 2 formed of the single sheet metal 99 has a rigidity at the center in the longitudinal direction larger than that at the end in the longitudinal direction. That is, the contact pressure is increased at the center portion in the longitudinal direction due to the curvature in the longitudinal direction, but the rigidity at the center portion in the longitudinal direction of the inner blade 2 is larger than the rigidity at the end portion in the longitudinal direction. It is hard to be deformed at the central part of the glass, and the sharpness can be prolonged. In the embodiment shown in FIG. 16, the width in the short side direction of the inner blade 2 of the gap between the blade portion 98 of the inner blade 2 is shorter than the both end portions in the central portion in the longitudinal direction of the inner blade 2. By forming, the rigidity of the center part of the longitudinal direction is made higher than both ends.

  In the above example, the inner blade 2 that is in sliding contact with the inner surface of the net-shaped outer blade 1 is formed by bending a single sheet metal 99, but the slit inner blade 78 that is in sliding contact with the inner surface of the slit outer blade 11 is also used. It may be formed by bending one sheet metal 99 in the same manner as described above.

  Next, the grip part 5 will be described in detail. As shown in FIG. 8, the main body grip case 30 constituting the outer shell of the grip portion 5 is divided into a front main body grip case 30a and a rear main body grip case 30b, and the front and rear main body grip cases 30a and 30b are used for the housing. A box body in which the lower part of the main body grip case 30 is sealed in a state of being coupled via the O-ring 30c, and the battery 31 and the drive circuit 18 are placed inside the lower box part of the main body grip case 30. A switch button 32 and a base 33 for holding these are internally mounted and fixed. The front and rear main body grip cases 30a and 30b are fixed by screws 34 from the rear side after these interior parts are assembled.

  Further, the rear panel 61 is fitted from the rear side of the main body grip case 30, and the lower cover 62 is fitted to the lower end portion.

  The upper part of the lower part of the main body grip case 30 sealed in the box shape, that is, the upper part of the main body grip case 30 is a recess opened upward, and the head part 4 is supported in this recess. A head support block 35 is arranged for this purpose.

  As shown in FIGS. 7 and 8, the head support block 35 is a support for connecting a pair of left and right connecting members 36 for connecting the head portion 4 and the grip portion 5 and one end of each of the pair of left and right connecting members 36. A base 37 and a guide member 38 fixed to the support base 37 and attached to the main body grip cases 30a and 30b so as to be movable up and down are configured.

  The connecting member 36 includes two front and rear arm portions 39, a shaft 40 that integrally connects one end portions (lower end portions) of the two front and rear arm portions 39, and the other end portion (upper end portion) of the two front and rear arm portions 39. It is comprised with the axis | shaft 41 which faces the provided front-back direction.

  The guide member 38 is attached to the main body grip case 30 so as to be slidable in the vertical direction as will be described later. A support base 37 is attached to the upper portion of the guide member 38 with screws 42.

  The support base 37 is provided with hanging pieces 37c for fixing to the guide member 38 from both the left and right ends of the bottom plate 37a, and the standing pieces 37b overlapping the front and rear sides of the head portion 4 from the front and rear ends of the bottom plate 37a. The holes 43 are provided at two positions on the left and right of the upper end of the front and rear standing pieces 37b. A shaft 41 provided at the upper end portion of the connecting member 36 is rotatably fitted in the hole 43, and one end portion of the connecting member 36 is inserted by fitting the shaft 41 provided at the upper end portion of the connecting member 36 with the hole 43. A main body side connecting portion A is configured to rotatably connect to the grip portion 5 side. In this way, one end portion (upper end portion) of the pair of left and right two connecting members 36 is rotatably connected by the main body side connecting portion A including the shaft 41 and the hole 43 as described above.

  Further, as shown in FIG. 5, the shafts 40 at the lower ends of the pair of connecting members 36 are rotatably fitted in grooves 28 provided at the lower ends of the head case 8, and the lids 28 are prevented from coming off. 97, and is attached to the head portion 4 side so as to be freely rotatable by attaching with the screw 16 for fixing the motor 6 described above. Accordingly, the blade head side connecting portion B for rotatably connecting one end portion of the connecting member 36 to the head portion 4 side is constituted by the groove 28, the lid 97 and the shaft 40.

  In this way, the head portion 4 is attached to one end portion (upper end portion) side of the grip portion 5 via the pair of connecting members 36. In this case, the main body side connecting portion A is the blade head side connecting portion B. Rather than the net-like outer blade 1 side (blade surface side) of the head portion 4 (that is, the net-like outer blade 1 constituting the blade surface is present on the upper surface of the head portion 4. The main body side connecting portion A is disposed at the upper position and the blade head side connecting portion B is disposed at the lower position), and the head portion 4 is laterally moved with respect to the grip portion 5 via the pair of connecting members 36. The head portion 4 is attached to the grip portion 5 so as to be rotatable (swing) to the left and right.

  Here, the distance between the blade head side connection part B which is a part which connects a pair of connection member 36 to the head part 4 is longer than the distance between the main body side connection parts A, and a pair of connection member 36 is a front surface. It looks like an eight character. As a result, the intersection point on the extension line of the arm portion 39 of the pair of connecting members 36 can be set as the instantaneous virtual fulcrum O so that the head portion 4 can swing with respect to the grip portion 5 via the connecting member 36. In addition, it is preferable that the distance between the blade head side connection part B of a pair of connection member 36 is 1.5 times or more of the distance between the main body side connection parts A. If the distance between the blade head side connecting portions B of the pair of connecting members 36 is less than 1.5 times the distance between the main body side connecting portions A, the swing angle is too small and there is a problem in followability to the skin. However, by setting it to 1.5 times or more, the pair of connecting members 36 can suspend and support the head portion 4 in a swingable manner with good followability to the skin and stably. Moreover, it is preferable that the angle which a pair of connection member 36 makes exists in the range of 30 degrees-120 degrees.

  The front and rear arm portions 39 of the pair of left and right connecting members 36 form links on the front and rear surfaces of the head portion 4, respectively, but it is preferable to cover the outside in order to prevent impacts and prevent garbage such as wrinkles.

  In this embodiment, the front and rear portions of the head case 8 are provided with a recess 44 whose lower surface is an opening 44a, and the left and right arm portions 39, the shaft 41, and the standing piece 37b of the connecting member 36 are assembled into the recess 44 from the opening 44a. The front and rear surfaces are protected with the cover 97, and the shaft 40 is protected with the lid 97.

  The guide member 38 having the support base 37 attached to the upper end portion is provided with a hole 47 corresponding to the hole 37d formed in the bottom plate 37a of the support base 37 so that the lead wire 17 passes through the communicating hole 37d and hole 47. It has become.

  The guide member 38 is provided with a crosspiece 48 so as to cross the hole 47, and a spring 49 made of a tension spring is attached so as to connect the lower end of the head case 8 and the crosspiece 48.

  As shown in FIG. 8, guide grooves 50 are formed in the vertical direction on the rear surface of the upper portion of the front main body grip case 30a and the front surface of the upper portion of the rear main body grip case 30b. The head is arranged so as to be sandwiched between the front and rear main body grip cases 30a and 30b, and a guide portion 38a provided on the front and rear surfaces of the guide member 38 is fitted in the guide groove 50 so as to be slidable in the vertical direction. The support block 35 is slidably mounted in the upper and lower recesses of the main body grip case 30. Here, when the head support block 35 slides up and down in the recess in the upper part of the main body grip case 30 as described above, the outer surface side of the head support block 35 or the recess of the main body grip case 30 can be smoothly slid. When either one or both of the inner surfaces are provided with a roller 63 and slide up and down, the roller 63 rolls to make the slide smooth. In the embodiment shown in the accompanying drawings, a front roller 63 is rotatably attached to the inner surface side of the recess of the front body grip case 30a, and the front roller 63 is rolled to the front surface of the head support block 35 to support the head. A rear roller 63 is rotatably attached to the rear surface side of the block 35 so that the rear roller 63 rolls on the inner surface of the recess of the rear main body grip case 30b.

  A spring 51 is interposed between the bottom of the recess provided in the upper portion of the main body grip case 30 (that is, the upper surface portion of the lower box-shaped portion) and the guide member 38 of the head support block 35. An upward spring force is applied to the support block 35. Here, a stopper (not shown) is provided so that the head support block 35 attached to the grip portion 5 so as to be movable up and down does not come off from the grip portion 5.

  As described above, the head support block 35 is movable in the vertical direction to the grip portion 5 and is elastically biased upward by the spring 51, so that the head portion 4 floats to be movable in the vertical direction with respect to the grip portion 5. Will be supported. Accordingly, in the present embodiment, as described above, the two net blade cassettes 10 provided with the net-like outer blade 1 constituting the upper portion of the head portion 4 and the slit blade cassette 12 provided with the slit outer blade 11 are respectively heads. In addition to being able to float independently of the holding member 13 attached to the head case 8 constituting the lower part of the portion 4, the head portion 4 further floats and supports the grip portion 5 so as to be movable in the vertical direction. It is.

  When using the electric razor having the above-described configuration, the grip portion 5 is grasped by hand, and the net-like outer blade 1 and the slit outer blade 11 on the upper surface of the head portion 4 are pressed against the skin for shaving. It is.

  Here, in the present invention, as described above, the net-shaped outer blade 1 is curved in the longitudinal direction to form a gently convex curved surface 3, and the net-shaped outer blade 1 and the inner blade 2 are combined. As shown in FIGS. 13A and 13B, the holding head portion 4 is configured to be rotatable to the left and right as shown in FIGS. Therefore, when the grip portion 5 is grasped by hand and the net-like outer blade 1 is pressed against the skin, the convex curved surface 3 curved in the longitudinal direction according to the pressing direction of the net-like outer blade 1 against the skin. The head portion 4 having the net-shaped outer blade 1 is rotated with respect to the grip portion 5, and the convex curved surface 3 follows the skin and inclines in a direction adapted to the skin and can be effectively shaved. It is. In addition, in this case, the net-shaped outer blade 1 is curved so as to be a convex curved surface in the short direction in a state in which the convex curved surface 3 is made to follow the skin and is tilted in a direction adapted to the skin. Therefore, it is possible to shave while smoothly moving the net-like outer cutter 1 in the front-rear direction (short direction), and of course, the head portion 4 having the net-like outer cutter 1 whose longitudinal direction is the convex curved surface 3. Is rotated with respect to the grip part 5 so that a part of the head part 4 does not partly penetrate into the skin, and the net-like outer cutter 1 having the convex curved surface 3 in the longitudinal direction is thereby formed on the skin. Shaving while smoothly moving in the longitudinal direction of the net-shaped outer blade 1 while fitting to the skin, or fitting the net-shaped outer blade 1 having a convex curved surface 3 in the longitudinal direction to the skin Keep the net-shaped outer blade 1 rotating against the skin in the state of being left It is possible to perform shaving, in which shaving can while moving the outer blade 1 of the net-like net-shaped outer blades 1 smoothly in all directions in the pressing state to the skin.

  In particular, since the net-shaped outer blade 1 has a convex curved surface 3 in the longitudinal direction, the convex curved surface 3 can be fitted to the concave under the chin. The net-shaped outer blade 1 is shaved by moving the net-shaped outer blade 1 in the longitudinal direction or the short-side direction while keeping the convex curved surface 3 of the net-shaped outer blade 1 fitted. The net-shaped outer blade 1 can be moved and shaved while the convex curved surface 3 is fitted to the indentation under the chin, and the shaving efficiency under the chin is greatly improved. Will do.

  Furthermore, in the present invention, the slit outer blade 11 disposed between the front and rear net-shaped outer blades 1 that are curved in the longitudinal direction to form a gently convex curved surface 3 is also curved in the longitudinal direction and is gentle. Since the convex curved surface 11a is formed, when the head portion 4 is moved along the longitudinal direction of the net-shaped outer blade 1, the slit outer blade 11 is pressed against the skin with the convex curved surface 11a of the slit outer blade 11. However, it is possible to shave so that it can be moved more smoothly in the longitudinal direction and can be turned more smoothly against the skin.

  In the present invention, the head portion 4 is movable up and down as shown in FIGS. 12A and 12B via the head support block 35 having the pair of connecting members 36 as described above with respect to the grip portion 5. (FIG. 12A shows an initial state in which the pressing force from above does not act on the head portion 4, and FIG. 12B shows that the pressing force acts on the head portion 4 from above. Since the net-like outer blade 1 and the slit outer blade 11 provided on the head portion 4 have better followability to the skin, the impact on the skin is reduced and the skin is touched. In the embodiment, the two net blade cassettes 10 provided with the net-like outer blade 1 and the slit blade cassette 12 provided with the slit outer blade 11 are respectively provided at the lower part of the head portion 4. Configure the head case Since each net-like outer cutter 1 and slit outer cutter 11 follow the skin more independently, the followability to the skin is further improved. is there.

  Further, as described above, the skin slip that constitutes a smooth corner continuous with the net-shaped outer blade 1 on the frame end surface portion 10a adjacent to both ends in the longitudinal direction of the net-shaped outer blade 1 in the net blade cassette 10. Since the surface 27 is provided, the slippery surface 27 improves the sliding of the net blade cassette 10 to the skin, and when the shaving is performed, the blade block 7 is pressed against the skin. In addition to being able to move in the hand direction (front-rear direction), it can be moved more smoothly in the longitudinal direction or moved in the longitudinal direction. Therefore, the contact area between the skin sliding surface 27 and the skin is reduced, the dynamic friction between the skin sliding surface 27 and the skin is reduced, the sliding performance of the blade block 7 is increased, and the net-like outer blade at the time of shaving is further increased. 1 Movement or rotational movement in the longitudinal direction can be performed smoothly.

In addition, the blade block 7 is moved in the short direction (front-rear direction) of the net-shaped outer blade 1 while the grip portion 5 is gripped by hand and the net-shaped outer blade 1 and the slit outer blade 11 are pressed against the skin. When the grip portion 5 is gripped by hand and pressed against the skin, the subsequent net blade cassette 10 (the net blade cassette 10 having no spring receiving projection 75a) is pushed upward with respect to the holding member 13. force Q ₁ is, push-up or power Q ₂ upward with respect to the holding member 13 of the previous net blade cassette 10 (net blade cassette 10 towards having a spring receiving protruding portion 75a), the upper against the holding member 13 of the slit blade cassette 12 It is greater than the upward force Q ₃ to, that is, since it is _{Q 1> Q 2, Q 3} , the outer blade 1 the net-like net blade cassette 10 after a large push-up force to the skin becomes the head Move backward If in the so that performing shaving, it is possible to improve the squeezing and brushed with its cutting efficiency beard when moving backward along the skin.

  By the way, in the present invention, the head portion 4 provided with the net-like outer blade 1 having the convex curved surface 3 in the longitudinal direction and the slit outer blade 11 having the convex curved surface 11a along the longitudinal direction is located above and below the grip portion 5. The head portion 4 is moved in the front-rear direction in a state where the net-like outer cutter 1 having the convex curved surface 3 in the longitudinal direction as described above is pressed against the skin and fitted by being movable and swingable left and right. Although it is easy to move the head part 4 smoothly in all directions or to rotate it even in a difficult-to-move part, in the present invention, the head part 4 is connected to the grip part via the pair of connecting members 36. 5, the link mechanism is constituted by a pair of connection members 36, and as shown in FIGS. 12 and 13, by arranging the pair of connection members 36 in an eight-character shape, Connecting member 36 The instantaneous virtual fulcrum O, which is the point where the extension line of the line connecting the blade head side connecting part B and the main body side connecting part A, which is the rotating part of both ends intersects, is used as the blade surface of the head part 4 (that is, the net-like outer blade) 1 and can be provided at a position close to the slit outer blade 11), thereby centering the instantaneous virtual fulcrum O located at a position close to the blade surface of the head portion 4 (that is, the net-shaped outer blade 1 and the slit outer blade 11). Since the head portion 4 oscillates and can be oscillated with low resistance, the oscillating motion can be smoothly performed and the blade surface (the net-like outer cutter 1 and the slit outer cutter 11) can be applied to the skin with a small pressing force. Sufficient adhesion can be obtained, and good shaving can be achieved with a light operation.

  Moreover, the main body side connecting portion A is brought closer to the blade surface (net-like outer blade 1, slit outer blade 11) side of the head portion 4 than the blade head side connecting portion B, and the head is connected to the grip portion 5 by the pair of connecting members 36. Since the suspension support type link structure is configured to suspend and support the portion 4, it is temporarily placed on the left side of the blade surface (the net-shaped outer blade 1 and the slit outer blade 11) in the state of FIG. When the force F3 is applied from the diagonally left direction, both connecting members 36 rotate counterclockwise around the main body side connecting portion A as viewed from the front, and the head portion 4 rotates counterclockwise as a whole. Although it moves, as shown in FIG. 13A, it rotates until the line connecting the main body side connecting portion A and the blade head side connecting portion B of the right side connecting member 36 becomes parallel to the force F3 acting obliquely. Then, it corresponds to the force F3 acting from the diagonal direction The convex surface 3 along the longitudinal direction of the net-like outer blade 1 of the head portion 4 and the convex curved surface 11a along the longitudinal direction of the slit outer blade 11 in a stable state are stopped at the inclination angle of the head portion 4. Will be pressed against.

  12A, when a force F4 is applied to the right side of the net-shaped outer blade 1 from the right oblique direction, both connecting members 36 have the main body side connecting portion A as the center of rotation when viewed from the front. The head part 4 rotates clockwise as a whole by rotating clockwise, but the connecting member 36 becomes horizontal (that is, the line connecting the main body side connecting part A and the blade head side connecting part B becomes horizontal). ) Previously, as shown in FIG. 13B, the line connecting the main body side connecting portion A and the blade head side connecting portion B of the left side connecting member 36 is rotated until it is parallel to the force F4 acting obliquely. Then, it stops at the inclination angle of the head portion 4 corresponding to the force F4 acting from the oblique direction, and the convex curved surface 3 along the longitudinal direction of the net-like outer blade 1 of the head portion 4 and the slit outer blade 11 in a stable state. The convex curved surface 11a along the longitudinal direction of the To become.

  The force F3 and the force F4 indicated by the force F3 are the net-shaped outer blades 1 and 4a when the convex curved surfaces 3 and 11a along the longitudinal direction of the slit outer blade 11 are pressed against the skin. The reaction force from the skin acting on the convex curved surfaces 3 and 11a along the longitudinal direction of the blade 1 and the slit outer blade 11, and the state of the skin against which the head portion 4 is pressed and the state where the head portion 4 is pressed against the skin However, in the present invention, the connecting member 36 always corresponds to the direction and inclination angle of the force acting obliquely. The main body side connecting portion A and the blade head side connecting portion B are stably stopped in a state where they are rotated until they are parallel to the force F acting obliquely. Further, the magnitude of the force F differs depending on whether the head portion 4 is pressed strongly against the skin or weakly, but even if the magnitude of the force F is different, in the present invention, the force F acting obliquely is used. When the head portion 4 is rotated, the line connecting the main body side connecting portion A and the blade head side connecting portion B of the connecting member 36 in parallel with the force F acting obliquely corresponds to the direction and inclination angle of the force F. The head unit 4 is stably stopped in a state where the head unit 4 is rotated until it becomes. Thereby, according to the contact direction and force of the head part 4 with respect to skin, each convex curved surface 3 and 11a along the longitudinal direction of the net-shaped outer blade 1 and the slit outer blade 11 presses against skin in the most preferable state. Thus, the head 4 is swung, and the convex curved surface 3 along the longitudinal direction of the net-like outer cutter 1 with respect to the skin and the slit outer cutter 11 so as to be in a preferable state suitable for the pressing direction of the head 4. The convex surface 11a along the longitudinal direction of the head portion 4 can be stabilized in a state in which the head portion 4 is placed in a posture in which the shaving can be best achieved regardless of the shaving method. The shave can be satisfactorily shaved so as not to leave any shaving of the heel while smoothly making the convex curved surface 3 along the longitudinal direction of the blade 1 and the convex curved surface 11a along the longitudinal direction of the slit outer blade 11 follow the skin smoothly. .

  Here, the head portion 4 is suspended and supported from the grip portion 5 via the connecting member 36 as described above, and is suspended so that the head portion 4 is sandwiched by the connecting member 36 from both the front and rear sides at a high position in the front and rear. By lowering, it becomes difficult to bend even in pressing from the front and rear oblique directions. Regardless of strong pressing or weak pressing, the convex curved surface 3 along the longitudinal direction of the net-shaped outer blade 1 and the longitudinal direction of the slit outer blade 11 Can be directed in the pressing direction.

  In this case, as in this embodiment, both the connection methods in the main body side connection portion A and the blade head side connection portion B for connecting the pair of connection members 36 to the grip portion 5 side are axial rotation types. Thus, the head portion 4 can be swung and rotated with a small force, so that no matter how it is shaved, the convex curved surface 3 along the longitudinal direction of the net-like outer cutter 1 and the slit outer cutter 11 The convex curved surface 11a along the longitudinal direction can be made to follow the skin more smoothly.

  Further, since one end portion (lower end portion) of the front and rear two arm portions 39 of the connecting member 36 is integrated with the shaft 40, the connecting portion where the rattle is generated can be reduced, and at the same time, the shaft 40 which is long in the front and rear direction is attached to the head case 8. It is possible to make a structure that fits in the longitudinally long groove 28 provided at the lower end portion so as to be freely rotatable, and the link between the shaft 40 and the groove 28 becomes long, and a link mechanism that is difficult to twist against torsion can be achieved.

  In addition, the head portion 4 and the head support block 35 are always attracted by the spring 49 made of a tension spring, so that the inclination of the head portion 4 can always be kept neutral when there is no external force to the head portion 4. The contact angle against the skin is stable, and by using a tension spring as the spring 51, the force that the spring force exerts on the rotational force in the left-right direction can be reduced, and the followability to the skin is improved. Can be improved.

  The trimmer block 52 is provided in the electric shaver according to the present invention. The trimmer block 52 is attached to the rear side of the rear body grip case 30b so as to be movable up and down, and by sliding the trimmer block 52 upward, The trimmer driving rod 24 of the section 4 and the trimmer driving element of the trimmer block 52 are coupled, so that the trimmer blade 53 is driven.

It is a perspective view of the electric razor of this invention. It is a perspective view of the state which removed the blade block same as the above and an inner blade. It is a front view same as the above. It is a side view same as the above. It is front sectional drawing same as the above. It is side surface sectional drawing same as the above. It is a disassembled perspective view of a head part same as the above and a head support block. It is a disassembled perspective view of a grip part same as the above and a head support block. It is a disassembled perspective view of a blade block same as the above. It is a partially-omission exploded perspective view of a head part same as the above. It is a disassembled perspective view of the slit blade cassette same as the above. (A) is an operation explanatory view showing a state in which no external force is applied to the head part with respect to the grip part of the above, and (b) is a downward direction due to a pressing force from above acting on the head part of the same. It is action explanatory drawing which shows the state which moved. (A) and (b) are operation | movement explanatory drawings which show the state which the head part is swinging in the left-right direction with respect to the grip part same as the above. It is a graph which shows the contact load distribution of the net-shaped outer blade under a jaw. It is a graph which shows the contact width of a net-like outer blade and skin in the nose and chin. (A) is a perspective view of the inner blade used in the above, (b) is a front view, (c) is a sectional view of the blade portion of the inner blade, and (d) is before bending the inner blade. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Net-shaped outer blade 2 Inner blade 3 Convex curved surface 4 Head part 5 Grip part

Claims (17)

  A net-like outer blade and an inner blade that is in sliding contact with the inner surface of the net-like outer blade, the net-like outer blade forms a convex curved surface that is curved in the longitudinal direction, and the curvature in the longitudinal direction is the radius of curvature thereof An electric shaver characterized by having a thickness of 150 mm to 350 mm.   The net-like outer blade is curved so that the central portion in the short direction is convex even in the short direction, and the curvature radius of the short direction is 1.5 mm to 3.5 mm. Item 1. An electric razor according to item 1.   The electric razor according to claim 1 or 2, wherein a plurality of net-shaped outer blades are arranged side by side in a short direction of the net-shaped outer blade.   A head portion is provided to protrude at one end portion in the longitudinal direction of the grip portion, and a plurality of net-like outer blades are juxtaposed in the short direction of the net-like outer blade on the projecting tip surface of the head portion. 4. The electric shaver according to claim 3, wherein the angle between the grip portion and the head portion is set to be an obtuse angle when viewed from the same direction as the longitudinal direction of the blade.   The electric shaver according to claim 3 or 4, wherein a plurality of net-shaped outer blades are freely floatable.   Each of the net-shaped outer blades is provided with an elastic lifting force by a spring so that each net-shaped outer blade can float freely, and the elastic lifting force applied to the plurality of net-shaped outer blades is made different. The electric shaver according to claim 5, wherein   The distance between the net-shaped outer blades is 0.5 to 2 times the radius of curvature in the short direction of the net-shaped outer blades. The described electric razor.   The electric shaver according to claim 7, wherein a slit outer blade is disposed between the net-shaped outer blade and the net-shaped outer blade.   A slit outer blade is disposed between the net-shaped outer blade and the net-shaped outer blade, and each net-shaped outer blade is provided with elastic lifting force by a spring on each of the net-shaped outer blade and the slit outer blade on both sides. The blade and slit outer blade are floatable, and one of the net-shaped outer blades on both sides has an elastic lifting force larger than the elastic lifting force applied to the other net-shaped outer blade and slit outer blade. The electric shaver according to claim 8, wherein:   The height position of the center part in the longitudinal direction of the slit outer blade is lower than the height position of the center part in the longitudinal direction of the net-shaped outer blades on both sides. 9. The electric razor according to 9.   The slit outer blade is curved in the longitudinal direction to form a convex curved surface, and the curvature radius of the convex curved surface of the slit outer blade is larger than the curvature radius of the convex curved surface in the longitudinal direction of the net blade. The electric razor according to claim 10.   The longitudinal direction of the net-shaped outer blade is defined as the left-right direction, and the head portion holding the net-shaped outer blade and the inner blade is configured to be rotatable to the left and right with respect to the grip portion. The electric shaver according to any one of claims 1 to 11.   The size of the blade hole at the center in the longitudinal direction of the net-shaped outer blade is made smaller than the blade hole at the end in the longitudinal direction. Electric razor.   The electric shaver according to any one of claims 1 to 13, wherein the thickness of the net-shaped outer blade in the center portion in the longitudinal direction is made larger than the thickness of the end portion in the longitudinal direction.   The electric shaver according to any one of claims 1 to 14, wherein the inner blade that is in sliding contact with the inner surface of the net-shaped outer blade is formed by bending one sheet metal.   16. The electric shaver according to claim 15, wherein the tip of the blade portion of the inner blade that is in sliding contact with the inner surface of the net-shaped outer blade has an acute angle.   The electric shaver according to claim 15 or 16, wherein the rigidity of the central portion in the longitudinal direction of the inner blade that is in sliding contact with the inner surface of the net-shaped outer blade is larger than the rigidity of the end portion in the longitudinal direction. .

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