JP3540507B2 - Electric razor - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electric razor including a slit outer blade.
[0002]
[Prior art]
Electric razors with two to three blades were developed. The triple electric razor has a feature that enables efficient shaving. However, even a three-blade electric razor cannot efficiently cut a beard. This is because the beard does not protrude from the skin in the vertical direction, but curves and makes the tip adhere to the skin. A beard of this shape cannot be cut by an outer blade that bends a net blade in an arch shape.
[0003]
In order to solve this problem, a triple electric razor in which a slit outer blade is disposed between two arch outer blades has been developed. The slit outer blade has a flat upper surface and an open parallel slit. The slit outer blade having this structure can cut a whisker more quickly than an outer blade in which thin mesh blades opening countless shaving holes are curved in an arch shape. This is because the parallel slits are better at inducing habit beards than shaving holes.
[0004]
[Problems to be solved by the invention]
However, even with an electric razor provided with a slit outer blade, it is extremely difficult to cut a beard swiftly and satisfactorily. In order for the slit outer blade to reliably cut the beard, it is necessary to surely guide the beard to the parallel slit. The slit outer blade can increase the width of the parallel slit to improve the attraction of the beard. However, if the parallel slits are widened, there is a problem that the skin is easily damaged. This is because the skin is pressed into the wide parallel slit and cut by the inner blade that slides on the inner surface. If the width of the parallel slit is reduced in order to protect the skin, the intrusion of the beard will be significantly worse. The fact that the slit outer blade can reliably cut the beard and does not damage the skin are mutually contradictory characteristics.
[0005]
The present invention has been developed with the primary objective of achieving extremely difficult and conflicting properties. A first object of the present invention is to reduce habitual beard with less damage to the skin.Electric razorIs to provide.
[0006]
By the way, the slit outer blade can be mass-produced at low cost by pressing a metal plate. In this method, a flat metal plate is pressed to open parallel slits and then bent into a rectangular shape. According to this method, a large number of slit outer blades can be efficiently produced, but the shape cannot be ideally cut. The slit outer blade can improve sharpness by making the edge angle between the opposing surface of the parallel slit and the inner surface of the slit outer blade an acute angle. However, in the method of manufacturing by pressing, the edge angle cannot be processed to an acute angle. Further, in order to improve the sharpness of the parallel slit and the inner blade, the inner blade needs to be slightly inclined with respect to the parallel slit. With this structure, the inner blade and the parallel slit approach each other while crossing each other like a scissor to cut a beard, thereby reliably cutting the beard. However, in order to realize this structure, it is necessary to make the parallel slit and the inner blade in an inclined position, which makes the manufacturing difficult.
[0007]
A second object of the present invention is to solve this problem, that is, to provide a method of manufacturing a slit outer blade mounted on an electric shaver capable of easily, easily, and inexpensively mass-producing a slit outer blade that can be cut well. It is in.
[0008]
[Means for Solving the Problems]
The electric shaver according to the present invention includes a slit outer blade 2 extending in the lateral direction and opening a plurality of parallel slits 4. A beard is drawn into the parallel slits 4 of the slit outer blade 2 to slide the inner surface. Cut with a blade.
[0009]
Further, in the electric shaver of the present invention, the width of the parallel slit 4 is tapered toward the end. When the slit outer blade 2 is moved along the skin H, the beard is led into the parallel slit 4 from the wide portion at the end and cut.
[0010]
Furthermore, the electric razor according to claim 2 of the present invention,The parallel slit 4 is extended from the outer corner portion to the outer vertical portion 2a and opened, and the width of the parallel slit 4 is increased toward the outer corner portion.
[0011]
Still further, according to claim 3 of the present inventionThe electric razor is characterized in that the parallel slit 4 is extended to both ends and opened, and the width of the parallel slit 4 is formed wider at both ends than at the center.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the following examples illustrate an electric shaver for embodying the technical idea of the present invention, and the present invention does not specify the electric shaver as follows.
[0013]
Further, in this specification, in order to make it easy to understand the claims, the numbers corresponding to the members shown in the embodiments are referred to as “claims” and “means for solving the problems”. Are added to the members indicated by "." However, the members described in the claims are not limited to the members of the embodiments.
[0014]
The electric razor shown in FIGS. 1 and 2 has two arch outer blades 1, two slit outer blades 2 provided outside the arch outer blades 1, an arch outer blade 1 and a slit outer blade. 2 are arranged in parallel and detachably mounted, an outer blade frame 7 in which the outer blade case 6 is detachably mounted, and an inner blade of the arch outer blade 1 for sliding. An inner blade 3 that is moved, a sub-inner blade 5 that is pressed and slid on the inner surface of the slit outer blade 2, an inner blade base 11 that connects the arch inner blade 3 and the sub-inner blade 5, And a drive mechanism for reciprocating the inner blade base 11.
[0015]
The two arch outer blades 1 and the two slit outer blades 2 are independently mounted on the outer blade case 6 as shown in FIG. The slit outer blade 2 is arranged in parallel outside the two arch outer blades 1. The arch outer blade 1 is disposed at a position protruding from the slit outer blade 2. The reason is that the arch outer blade 1 is surely pressed against the skin to finish and shave the beard neatly.
[0016]
As shown in FIG. 3, the arch outer blade 1 has a mesh holder 1A fixed to a plastic holder 8. The mesh blade 1 </ b> A is a thin metal plate having a thickness of, for example, 30 to 100 μm, optimally about 50 μm, and is fixed to the holder 8 while being curved in an arch shape. The mesh blade 1A has numerous shaving holes. The holder 8 is formed by molding a hard plastic into a rectangular square tube having an open top and bottom.
[0017]
The slit outer blade 2 has a parallel blade 2A fixed to a plastic holder 8 as shown in FIG. 3 and FIG. The parallel blade 2A is, as shown in FIG. 5, a rectangular metal plate having a plurality of parallel slits 4 extended in the lateral direction and opened. The parallel blade 2A has a parallel slit 4 formed in an upper portion of a rectangular metal plate obtained by bending a metal plate into a rectangular shape having a flat upper surface.
[0018]
As shown in FIG. 4 and FIG. 5, the parallel blade 2A of the slit outer blade 2 has a parallel slit 4 provided on an upper portion of a rectangular metal plate. As shown in the perspective views of FIGS. 4 and 5 and the plan view of FIG. 6, the parallel slit 4 gradually increases in width from the inner end facing the arch outer blade 1 to the outer end. I have. That is, when the inner width is X1 and the outer width is X2, the design is such that X1 <X2. For example, the inner width X1 is 0.3 to 1 mm, and the outer width X2 is 1.1 to 2 times X1.
[0019]
Further, as shown in FIG. 7 and FIG. 8 which is a cross-sectional view taken along the line AA of FIG. 6, the parallel blade 2A of the slit outer blade 2 has an edge angle formed between the opposing surface of the parallel slit 4 and the inner surface of the slit outer blade. α is an acute angle. The edge angle α is designed to be, for example, 50 to 85 degrees, preferably 55 to 80 degrees, and optimally about 60 degrees.
[0020]
The parallel blade 2A shown in FIGS. 5 and 6 is manufactured by the method shown in FIGS. The slit outer blade 2 is manufactured by manufacturing a parallel blade 2A having a parallel slit 4 and inserting this into a plastic holder.
[0021]
As shown in FIG. 9, the parallel blade 2 </ b> A rotates a rotating shaft 24 that fixes a plurality of polishing disks 23 in parallel at regular intervals, and uses the polishing disks 23 to move the tip of the rectangular metal plate 25. It is manufactured by cutting into a slit shape. The interval between the polishing disks 23 is the pitch of the parallel slits 4. The thickness of the polishing disk 23 determines the width of the parallel slit 4.
[0022]
The polishing disk 23 is manufactured by bonding abrasive materials such as diamonds in a disk shape with a binder. The outer periphery of the polishing disk 23 is gradually thinned in order to cut the parallel slit 4 in which the width of one end is gradually widened and the edge angle α is an acute angle. As shown in FIG. 10, the rectangular metal plate 25 is pressed against the polishing disk 23 in a posture inclined with respect to the radial direction of the polishing disk 23. The rectangular metal plate 25 pressed against the polishing disc 23 in this position is cut one deeper than the other, and the width of the parallel slit 4 that is deeply cut is wider than the width of the parallel slit 4 that is cut shallowly. You.
[0023]
Further, since the outer periphery of the polishing disk 23 is gradually thinned, the parallel slits 4 are cut so that the edge angle α becomes an acute angle. The rectangular metal plate 25 has a parallel slit 4 cut in the radial direction of the polishing disk 23 as shown by an arrow B in FIG. 10 or a parallel slit 4 approached in a tangential direction as shown by an arrow C in FIG. 4 is cut.
[0024]
In the parallel blade 2A shown in FIGS. 5 and 6, the width of one end is gradually increased from the width of the other end. As shown in FIG. 11, the parallel blade 2 </ b> A of the slit outer blade may have a shape in which the width at both ends is gradually increased from the center. The parallel blade 2A of this shape can be manufactured by cutting the rectangular metal plate 25 with the polishing disk 23 in the posture shown by the solid line in FIG. 10 and then cutting the parallel slit 4 in the posture shown by the chain line.
[0025]
As shown in FIG. 11, although not shown, the slit outer blade which makes the width of both ends wider than the center is most suitable for being provided between the arch outer blades. The slit outer blade shown in FIG. 5 is most suitable for being disposed outside the arch outer blade. The slit outer blade is arranged outside the arch outer blade so that the beard can be cut in an ideal state. For this reason, in this embodiment, the details in which the slit outer blade is disposed outside the arch outer blade are described in detail.
[0026]
The thickness of the parallel blade 2A is thicker than the mesh blade, for example, 0.1 to 0.5 mm, optimally 0.2 to 0.3 mm, 2 to 10 times the mesh blade, optimally about 5 mm. Double it. The reason why the thickness of the parallel blade 2A is increased is to increase the width of the slit outer blade 2 and reduce damage to the skin. In order to smoothly guide the beard to the parallel slit 4, it is necessary to increase the width of the parallel slit 4. However, if the parallel slits 4 are widened, the skin is easily pressed into the slits, and the skin is easily damaged by the sub inner blade 5 that slides on the inner surface. In order to prevent this adverse effect, the parallel blade 2A is made thick. As long as the thick parallel blade 2A does not press the skin deep into the parallel slit 4, the skin is not damaged by the sub inner blade 5.
[0027]
The parallel blade, in which the width of the parallel slit is widened and is thicker than the mesh blade of the shaving hole, can surely cut the beard and reduce the damage to the skin. The parallel blade of the slit outer blade roughly shave the beard. The rough shaved beard is finish shaved with an arch outer blade that is moved along the skin following the slit outer blade. The short-cut habit must be easily guided to the shaving hole of the arch outer blade, and the shaved beard is finely shaved.
[0028]
The arch outer blade 1 and the slit outer blade 2 are independently mounted on the outer blade case 6. The arch outer blade 1 and the slit outer blade 2 fix a mesh blade 1A or a parallel blade 2A to a rectangular cylindrical plastic holder 8.
[0029]
As shown in FIG. 3, the holders 8 of the slit outer blades 2 arranged on both sides of the arch outer blade 1 project from the lower surface and integrally form elastic deformation portions 8A at both ends. The elastic deformation portion 8A is a member that pushes out the slit outer blade 2 elastically. The elastic deformation portion 8A has a rod shape and protrudes downward from the center of the holder 8 toward both ends. As shown in this figure, the holder 8 provided with the elastic deformation portions 8A at both ends has a feature that the slit outer blade can be moved in parallel by the two elastic deformation portions 8A.
[0030]
The elastic deformation portion 8A presses the upper surface of the opening window side wall 7A of the outer cutter frame 7 at the tip, and pushes the slit outer blade 2 toward the skin. Therefore, the elastically deformable portion 8A is provided at a position where the slit outer blade 2 is mounted on the outer blade frame 7 and protrudes downward from the outer blade case 6 to press the upper surface of the open window side wall 7A of the outer blade frame 7. Can be The electric razor equipped with four outer blades can press the slit outer blades 2 arranged on both sides with the upper surface of the opening window side wall 7A of the outer blade frame 7. The double slit outer blades 2 arranged on both sides are provided with the elastically deformable portions 8A on one side of the holder 8 and on the surface that can press the upper surface of the opening window side wall 7A.
[0031]
The arch outer blade 1 disposed inside the slit outer blade 2 is pushed out toward the skin via the end spring 16 which is a coil spring, regardless of the elastic deformation portion. Therefore, it is not necessary to provide an elastically deformable portion in the holder 8 of the arch outer blade 1. The end spring 16 presses the arch outer blade 1 against the skin with a large stroke and a weaker pressing force than the elastically deformed portion. A quadruple shaver that presses the arch outer blade 1 against the skin lighter than the slit outer blades 2 on both sides, sinks deeply until the arch outer blade 1 becomes flush with the slit outer blade 2 when it is close to a right angle to the skin. Therefore, all four outer blades of the slit outer blade 2 and the arch outer blade 1 can be comfortably pressed against the skin.
[0032]
The slit outer blade 2 is mounted on the outer blade case 6 so as to be able to move up and down. Therefore, the slit outer blade 2 is provided with upper and lower slits 9 on both end surfaces of the holder 8. A guide projection 10 projecting from the inner surface of the outer cutter case 6 is guided by the upper and lower slits 9. The slit outer blade 2 is mounted on the outer blade case 6 so as to be able to move up and down via the upper and lower slits 9 and the guide protrusions 10. When the slit outer blade 2 moves up and down, the guide projection 10 moves up and down inside the upper and lower slits 9.
[0033]
The arch outer blade 1 is mounted on the outer blade case 6 so as to be able to move up and down via an intermediate base 6C of the outer blade case 6. The outer cutter case 6 in this figure includes an intermediate base 6C for connecting the arch outer cutter 1. The arch outer blade 1 is mounted on the intermediate table 6C so as to be able to move up and down while being pushed out by the end spring 16. The intermediate table 6C is connected to the outer blade case 6 so as not to be able to move up and down. The structure for connecting the arch outer blade 1 to the intermediate base 6C of the outer blade case 6 is the same as connecting the slit outer blade 2 to the outer blade case 6. That is, upper and lower slits 9 are provided at both ends of the holder 8 of the arch outer blade 1, guide protrusions 12 to be inserted into the upper and lower slits 9 are provided on the intermediate base 6C, and the guide protrusions 12 are slid into the upper and lower slits 9 so that the arch outer blade 9 is slid. The blade 1 is moved up and down.
[0034]
The intermediate base 6C is inserted into a connecting cylinder 6D provided on the inner surface of the outer cutter case 6 and connected to the outer cutter case 6. At the lower end of the connecting cylinder 6D, there is a locking projection 13 that hooks into the locking hole 14 of the intermediate base 6C to be inserted, and the locking projection 13 prevents the intermediate base 6C from coming off.
[0035]
The outer cutter case 6 is detachably attached to the outer cutter frame 7. As shown in FIGS. 3 and 12, the outer cutter case 6 is detachably mounted on the outer cutter frame 7 by hooking a hook piece 6 </ b> A on a hook portion 7 </ b> B which is a concave portion. The hook pieces 6A are provided so as to protrude from both end surfaces of the outer cutter case 6 and extend upward from below. The hook piece 6A has a built-in elastic metal plate 6B on its inner surface so that it can be elastically deformed. The hook 6A has a T-shape with a wide upper end. The outer cutter frame 7 has a hook portion 7B at a position where the hook piece 6A is hooked when the outer cutter case 6 is mounted, as shown in the cross-sectional view of FIG. When the outer cutter case 6 is mounted on the outer cutter frame 7, the hook pieces 6A are guided by the hook portions 7B and mounted on the outer cutter frame 7.
[0036]
In order to remove the outer cutter case 6 from the outer cutter frame 7, a detachable knob 15 is provided on the hook 7 </ b> B of the outer cutter frame 7. The attachment / detachment knob 15 is made of an elastically deformable plastic and is formed into a plate shape as a whole. The detachable knob 15 has a lower end fixed to the outer cutter frame 7 so that the upper part can be elastically deformed. A pressing rod 15A for pressing both ends of a T-shaped hooking piece 6A is integrally formed on the upper part of the attaching / detaching knob 15. Further, the detachable knob 15 is integrally formed with a push button 15B protruding outside the outer cutter frame 7. The push button 15B is inserted so as to be able to enter and exit the through hole of the outer cutter frame 7. When the outer cutter case 6 is removed from the outer cutter frame 7, the push button 15B is pressed. When the push button 15B is pressed, the pressing rod 15A pushes the hook piece 6A out of the hook portion 7B, and the hooked state of the outer cutter case 6 and the outer cutter frame 7 is released, and the outer blade case 7 is pulled out.
[0037]
The outer cutter frame 7 has an opening window 7C for mounting the outer cutter case 6 with almost no gap. The opening window 7C positions the upper surface of the opening window side wall 7A at the lower end surface of the outer cutter. The thickness of the upper surface of the opening window side wall 7A is designed so that the elastic deformation portion 8A provided on the holder 8 can be pressed. Since the holder 8 forms a part of the outer cutter case 6, it is preferably made of metal. In the electric razor shown in the figure, the outer blade frame 7 is detachably attached to the main body of the electric razor, but the outer blade frame may be formed integrally with the electric razor main body.
[0038]
The arch outer blade 1 and the slit outer blade 2, the outer blade case 6, and the outer blade frame 7 shown in FIG. 3 are assembled as described below.
(a) Attach the arch outer blade 1 to the intermediate table 6C. The arch outer blade 1 is mounted on the intermediate table 6C by guiding the upper and lower slits 9 to the guide projections 12.
(b) The slit outer blade 2 and the arch outer blade 1 mounted on the intermediate base 6C are mounted side by side in parallel with the outer blade case 6. The slit outer blade 2 is mounted on the outer blade case 6 via the upper and lower slits 9 and the guide protrusions 10. The intermediate base 6C is inserted into and connected to the connecting cylinder 6D of the outer cutter case 6.
(c) The outer blade case 6 having the arch outer blade 1 and the slit outer blade 2 mounted thereon is mounted on the opening window 7C of the outer blade frame 7. The outer cutter case 6 attached to the outer cutter frame 7 is attached to the outer cutter frame 7 in such a manner that the hook piece 6A is inserted into the hook portion 7B and cannot be easily removed.
[0039]
In this state, the slit outer blade 2 attached to the outer blade frame 7 elastically presses the upper surface of the opening window side wall 7A by the elastic deformation portion 8A. The slit outer blade 2 is attached to the outer blade case 6 in a state of being elastically pushed up by a reaction of the elastic deformation portion 8A pressing the opening window side wall 7A. Therefore, when the electric razor is used, when the slit outer blade 2 is pressed against the skin, the respective arch outer blade 1 and the slit outer blade 2 are elastically pressed against the skin, so that the shaving can be performed efficiently.
[0040]
The inner cutter connects the arch inner cutter 3 and the sub inner cutter 5 to the inner cutter base 11 as shown in FIG. The two arch inner blades 3 are reciprocated in the opposite direction, and the two sub inner blades 5 disposed outside the arch inner blade 3 are also reciprocated in the opposite direction. 3 and a series of sub inner cutters 5 are integrally connected to two inner cutter stands 11 vibrated in opposite directions.
[0041]
As shown in FIG. 13, the arch inner blade 3 is manufactured by arranging a plurality of blade plates 3B in parallel and inserting the blade plates 3B into plastic. The blade plate 3B is a metal plate, and the upper end is formed in a curved shape so as to contact the inner surface of the arch outer blade 1 curved in an arch shape.
[0042]
As shown in FIG. 5, the sub inner blade 5 is a metal blade having a tip bent in an L shape and provided with a comb-shaped slit, and is manufactured by being inserted into plastic similarly to the arch inner blade 3. ing. The upper surface of the sub inner blade 5 slides on the inner surface of the parallel blade 2A, and cuts a beard drawn into the parallel slit 4 of the parallel blade 2A.
[0043]
The plastic body into which the blade plate 3B of the arch inner blade 3 and the metal blade of the sub inner blade 5 are inserted is shown in FIG. 15 inside the parallel plate 6E which is disposed in parallel to face each other. Thus, the pair of connecting posts 6F are integrally formed. The connection support 6F is inserted and connected to the vertical cylinder 11B of the inner blade base 11. The center spring 21 that elastically pushes the sub inner blade 5 is disposed between the connecting posts 6F, as indicated by a chain line in FIG. Therefore, the interval between the connecting posts 6F is designed to be slightly wider than the outer diameter of the central spring 21 so that the central spring 21 can be inserted therebetween. Further, the inside, which is the opposing surface of the connecting post 6F, is curved so as to be recessed at the center as shown in FIG. Since the connecting column 6F is inserted into the vertical cylinder 11B of the inner cutter base 11, the outer space is designed to be substantially equal to the inner space of the vertical cylinder 11B.
[0044]
Further, the parallel plate 6E protrudes from the inner surface to form a locking portion 6G. The locking portion 6G is a locking member that prevents the slit outer blade 2 from being easily detached from the inner blade base 11 when the slit outer blade 2 is connected to the inner blade base 11. The locking portion 6G is provided at the center of the parallel plate 6E and integrally formed at the lower end thereof. Further, as shown in FIG. 15, the engaging portion 6G is formed in a hook shape having a tapered surface as shown in FIG. 15 so that the engaging portion 6G can be smoothly inserted into the inner blade base 11 and hooked. The locking portion 6G is guided by the locking window 11d of the vertical cylinder 11B when the slit outer blade 2 is connected to the inner blade base 11, and prevents the inner blade from coming off the inner blade base 11. When the parallel plate 6E of the inner blade and the connecting column 6F are inserted and connected to the vertical cylinder 11B of the inner blade base 11, the parallel plate 6E is elastically deformed, the interval thereof is slightly widened, and the locking portion 6G is It is guided to the locking window 11d of the vertical cylinder 11B. When the locking portion 6G is guided to the locking window 11d, the interval between the parallel plates 6E is reduced, and the locking portion 6G is hooked on the locking window 11d.
[0045]
Since the parallel plate 6E is inserted outside the vertical tube 11B of the inner cutter base 11 and the connecting post 6F is inserted inside the vertical tube 11B, the inner cutter base 11 is inserted between the parallel plate 6E and the connecting post 6F. There is a gap into which the vertical cylinder 11B can be inserted.
[0046]
The slit outer blade 2 is directly connected to the inner blade base 11, and the arch inner blade 3 disposed inside the slit outer blade 2 is connected to the inner blade base 11 via the upper and lower bases 11A. As shown in FIG. 13, the upper and lower bases 11A are connected to a vertical cylinder 11B of the inner cutter base 11 so as to be able to move up and down by being pushed by a central spring 21 which is a coil spring.
[0047]
The upper and lower bases 11A have stopper projections 11a at the lower ends so as not to easily come off from the vertical cylinder 11B. The stopper projection 11a is hooked on an upper surface of a hooking window 11b provided to extend vertically on a side surface of the vertical cylinder 11B, and prevents the upper and lower bases 11A from falling out of the vertical cylinder 11B. The upper and lower bases 11A are inserted into the vertical cylinder 11B so as to be able to move up and down in a vertical posture. In order to hold the attitude of the upper and lower bases 11A vertically, the vertical cylinder 11B has a facing surface formed into a shallow groove shape, and a sliding surface 11c of the upper and lower bases 11A is formed into a shape along this groove. The upper and lower stands 11A connect the arch inner blade 3 to the upper end. The arch inner blade 3 is connected to the upper and lower bases 11A so as not to move up and down. This is because the upper and lower bases 11A are moved up and down, and the arch inner blade 3 is moved up and down. The upper ends of the upper and lower bases 11A have locking windows 11d on both side surfaces for catching the locking portions of the inner blade, similarly to the upper shapes of the vertical cylinders 11B on both sides. Further, the upper and lower bases 11A are formed in a rectangular tube shape in which the central spring 21 can be built, and a bottom plate 11e pressed against the upper end of the built-in central spring 21 is provided in the middle. On the lower surface of the bottom plate 11e, a convex portion into which the upper end of the central spring 21 is inserted is formed.
[0048]
The vertical cylinder 11B of the inner cutter base 11 is provided with an insertion rod 11C for positioning the central spring 21 at the inner bottom. As shown in FIGS. 13 and 15, the insertion rod 11 </ b> C is integrally formed with a locking projection 11 f protruding from the surface thereof and hooking the center spring 21. The locking projection 11f protrudes between the lines of the spirally wound central spring 21 and hooks the central spring 21. Therefore, the locking projection 11f is designed to have a width inserted between the lines of the center spring 21. The locking projection 11f prevents the center spring 21 from coming off the insertion rod 11C when the lower end of the center spring 21 is hooked and the inner blade is detached from the inner blade base 11. However, if the central spring 21 is pulled strongly or the central spring 21 is pulled while rotating, the central spring 21 is deformed, or the spiral central spring 21 comes out of the locking projection 11f, and the central spring 21 is removed. be able to.
[0049]
As shown in FIG. 13, a window 11 g is opened on the bottom surface of the vertical cylinder 11 </ b> B connecting the sub inner blade 5, located below the locking projection 11 f. The locking projection 11f is provided on one side of the insertion rod 11C, located above the window 11g. The vertical position of the locking projection 11f provided on the insertion rod 11C is designed to be a position where the lower end of the center spring 21 inserted into the insertion rod 11C can be hooked.
[0050]
The vertical cylinder 11B of the inner cutter base 11 is extended up and down on the side surface to open a slit-like locking window 11d in order to prevent the locking part 6G of the attached sub inner cutter 5 from slipping out. I have. The locking portion 6G of the sub inner blade 5 is hooked on the locking window 11d to prevent the sub inner blade 5 mounted on the inner blade base 11 from easily coming off. However, when the sub inner blade 5 is pulled strongly, the locking portion 6G of the sub inner blade 5 comes out of the locking window 11d, and the sub inner blade 5 can be removed from the inner blade base 11.
[0051]
The center spring 21 is inserted into an insertion rod 11C provided on the inner cutter base 11, and elastically pushes the sub inner cutter 5 and the upper and lower bases 11 together. The sub inner blade 5 pushed out by the central spring 21 is elastically pressed by the inner surface of the slit outer blade 2 and cuts the beard that passes through the slit outer blade 2 efficiently.
[0052]
As shown in FIG. 14, the two inner cutter stands 11 that vibrate the arch inner cutter 3 and the sub inner cutter 5 are reciprocated in opposite directions by a drive mechanism built in the case. The drive mechanism includes a vibration table 17 for connecting the inner blade table, a motor 18 for reciprocating the vibration table 17, and a conversion mechanism for converting the rotation of the motor 18 into reciprocating motion to reciprocate the vibration table 17. .
[0053]
The conversion mechanism includes a cam shaft 19 fixed to a rotation shaft of a motor 18 and a connecting rod 20 connecting an eccentric shaft of the cam shaft to the vibration table 17. The center of the camshaft is arranged at a symmetric position about the rotation axis in order to vibrate the two connecting rods 20 in opposite directions. When one connecting rod 20 moves to the right, the other connecting rod 20 moves to the left and reciprocates the inner cutter base 11 in the opposite direction.
[0054]
In the drive mechanism having this structure, the cam 18 is rotated by the motor 18, the rotational motion of the eccentric shaft of the cam shaft 19 is converted into reciprocating motion by the connecting rod 20, and the vibration table 17 is reciprocated. At the center of the vibration table 17, a hole for connecting the connection rod of the inner blade table 11 is opened vertically. The connecting rod of the inner blade base 11 is inserted into the hole of the vibration table 17, and the inner blade table 11 is connected to the vibration table 17.
[0055]
【The invention's effect】
The electric razor of the present invention realizes an extremely excellent feature that can reduce the damage of the skin and reliably cut the habit. It also achieves two ideal but mutually contradictory properties that are important for electric razors. That is, the electric razor of the present invention, the width of the parallel slit provided on the slit outer blade is tapered toward the end portion, and when the slit outer blade is moved along the skin, the beard becomes the end portion. This is because the wide portion is promptly guided into the parallel slit and cut. The electric shaver of the present invention does not increase the width of the entire parallel slit. The width of the end is gradually increased. The important end for inducing the beard is widened to guide the beard quickly, but the part for cutting the introduced beard is not widened as a whole. For this reason, the electric razor of the present invention can promptly introduce a beard to the parallel slit having a large width, but does not damage the skin because the entire width of the parallel slit is not widened.
[0056]
Furthermore, the parallel slits that increase in width toward the ends are not parallel to each other, but are inclined to each other. The inclined parallel slit cuts the beard in a position intersecting the inner blade that slides inside. In this cutting state, the beard is surely cut so that the scissors cut the beard, and the sharpness is improved. In addition, since the blade of the inner blade is slid in a position intersecting the parallel slits without tilting, the inner blade can be easily manufactured.
[0057]
[0058]
[Brief description of the drawings]
FIG. 1 is a front view showing an electric shaver according to an embodiment of the present invention.
FIG. 2 is an exploded front view of the electric razor shown in FIG.
FIG. 3 is an exploded perspective view showing a state where an arch outer blade and a slit outer blade of the electric razor shown in FIG. 1 are disassembled.
FIG. 4 is a perspective view of an arch outer blade and a slit outer blade of the electric razor shown in FIG. 1;
FIG. 5 is a perspective view showing a state where a slit outer blade and a sub inner blade invite a beard into a parallel slit and cut the beard;
FIG. 6 is a plan view of the slit outer blade shown in FIG. 5;
FIG. 7 is a perspective view, partially in section, of the slit outer blade shown in FIG. 5;
8 is a cross-sectional view of the slit outer blade taken along line AA shown in FIG. 6;
FIG. 9 is a perspective view showing a state in which a rectangular metal plate is cut with a polishing disk.
FIG. 10 is a perspective view showing a state in which a rectangular metal plate is cut with an abrasive disc in an inclined posture.
FIG. 11 is a plan view showing a slit outer blade according to another embodiment of the present invention.
FIG. 12 is a sectional view of a portion where the outer blade case is detachably mounted.
FIG. 13 is a partial cross-sectional side view showing a state where the arch inner blade and the sub inner blade are connected to the inner blade base.
FIG. 14 is a perspective view showing a mechanism for vibrating the inner blade base.
FIG. 15 is a perspective view showing a portion connecting the arch inner blade and the sub inner blade to the inner blade base.
[Explanation of symbols]
1: Arch outer blade 1A: Net blade
2 ... Slit outer blade 2A ... Parallel blade
3 ... arch inner blade 3B ... blade plate
4: Parallel slit
5 ... Sub inner blade
6: Outer blade case 6A: Hook piece 6B: Elastic metal plate
6C: Intermediate table 6D: Connecting tube
6E: Parallel plate 6F: Connecting column
6G: Locking part
7: Outer blade frame 7A: Opening window side wall 7B: Hook
7C: Open window
8 Holder 8A Elastic deformation part
9 ... Top and bottom slits
10. Guide protrusion
11 ... Inner blade stand 11A ... Upper and lower stand 11B ... Vertical cylinder
11C ... insertion rod
11a: Stopper projection 11b: Hook window 11c: Sliding surface
11d: locking window 11e: bottom plate 11f: locking projection
11g ... window
12: Guide protrusion
13 ... locking projection
14 ... locking hole
15: Detachable knob 15A: Push rod 15B: Push button
16 ... End spring
17 ... Shaking table
18 ... Motor
19 ... Cam shaft
20 ... connecting rod
21 ... Central spring
22 ... Case
23 ... Polishing disc
24 ... Rotary axis
25 ... rectangular metal plate
K: habit mustache H: skin

Claims (3)

Arched curved mesh blade (1A) Arch outer blade with (1) And this arch outer blade (1) The blade has an edge along the inner surface of the (1) Inner blade that slides on the inner surface of the arch (3) When,
The arch outer blade (1) Slit outer blade arranged parallel to (2) And this slit outer blade (2) Has a blade edge along the inner surface of the (2) Sub inner blade that slides on the inner surface of (Five) And having
The slit outer blade (2) Is a rectangular parallel blade with a flat or nearly flat top surface (2A) With a rectangular parallel blade (2A) Is a parallel slit opened on the upper surface (Four) Is extended to the end and opened, parallel slit (Four) An electric razor characterized by having its width increased toward its ends. Arched curved mesh blade (1A) Arch outer blade with (1) And this arch outer blade (1) The blade has an edge along the inner surface of the (1) Inner blade that slides on the inner surface of the arch (3) When,
The arch outer blade (1) Outer blades arranged parallel to the outside of the slit (2) And this slit outer blade (2) Has a blade edge along the inner surface of the (2) Sub inner blade that slides on the inner surface of (Five) And having
The slit outer blade (2) Is a rectangular parallel blade with a flat or nearly flat top surface (2A) With a rectangular parallel blade (2A) Is a parallel slit opened on the upper surface (Four) From the outer corner to the outer vertical (2a) Extended to open, parallel slit (Four) An electric razor characterized by having its width increased toward the outer corners. Arched curved mesh blade (1A) Multiple arch outer blades with (1) And this arch outer blade (1) The blade has an edge along the inner surface of the (1) Inner blade that slides on the inner surface of the arch (3) When,
The arch outer blade (1) Outer slits arranged in parallel between (2) And this slit outer blade (2) Has a cutting edge along the inner surface of the (2) Sub inner blade that slides on the inner surface of (Five) And having
The slit outer blade (2) Is a rectangular parallel blade with a flat or nearly flat top surface (2A) With a rectangular parallel blade (2A) Is a parallel slit opened on the upper surface (Four) , Extend to both ends and open, parallel slit (Four) An electric shaver characterized in that the width of both ends is made wider than that of the center.

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