JP4953232B2 - Rotary electric razor - Google Patents

Description

  The present invention relates to a rotary electric shaver having a mesh blade-like outer blade.

  Regarding the electric razor of the present invention, it is known in Patent Document 1 that the wall surface of the outer blade is divided into two regions and the blade hole pattern is different in each region. However, the electric razor of Patent Document 1 is intended for an electric razor including an inner blade that is driven to rotate about a vertical axis and a dome-shaped mesh blade that circumscribes the upper surface of the inner blade. Has a fundamentally different beard cutting method.

  In a rotary electric shaver having a so-called twin blade structure with a pair of front and rear outer blades, one outer blade has a long hole and a slit, and the other outer blade has a hexagonal shape. It is known in Patent Document 2 to be composed of short hole groups. With regard to the arrangement pattern of the blade holes and the structure of the blade holes of the present invention, three blade holes are arranged along the inner corner of the Y-shaped cutting blade, and this basic pattern is repeated vertically and horizontally to create a mesh blade. (Refer to Patent Document 3), a partial arc-shaped blade hole is arranged adjacent to each of the sides of a regular triangular blade hole (see Patent Document 4), and one of the blade holes It is known to provide a raised protrusion on the part (see Patent Document 5).

Japanese Utility Model Publication No. 54-61795 (page 2, lines 15-17, FIG. 1) JP 2001-198366 A (paragraph number 0027, FIG. 7) Japanese Utility Model Publication No. 51-44493 (page 3, lines 7-17, Fig. 3) Japanese Patent Application Laid-Open No. 52-84063 (page 2, upper right column, lines 2 to 7, line 1) Japanese Utility Model Publication No. 59-59977 (page 4, lines 1-3, FIG. 3)

  As described above, although there are various proposals regarding the arrangement pattern of the blade holes and the structure of the cutting blade, it is necessary to surely perform primary cutting of long hairs and comb hairs and further to perform secondary cutting of primary hairs that have been primary cut. It is difficult to achieve both, and there is room for improvement in that shaving requires a lot of time. In actual use, the electric razor is reciprocated along the skin surface to cut the whiskers, but the cutting efficiency during the backward movement is often significantly lower than during the forward movement. It was one of the factors that required a lot of time for shaving.

  It is an object of the present invention to effectively perform primary cutting of long hairs and comb hairs and secondary cutting of primary hairs that have been primary-cut, and further, by reciprocating the electric razor along the skin surface, cutting the beard. When performing, as in the case of forward movement, it is possible to effectively perform whisker cutting during backward movement, and to provide a rotary electric razor capable of cutting whiskers in a shorter time as a whole.

  The electric razor of the present invention is directed to a rotary electric razor having an inner blade 22 that is rotationally driven and an arch-shaped outer blade 16B that is in sliding contact with the outer peripheral surface of the inner blade 22. An upstream cutting region N is provided in the outer blade wall on the upper side in the rotational direction of the inner blade 22 with respect to the arch apex C, and downstream in the outer blade wall on the lower side in the rotational direction of the inner blade 22 from the boundary. A cutting region R is provided. The bending direction length of the blade hole 37 provided in the upstream cutting region N is set to be larger than the bending direction length of the blade holes 37 and 40 provided in the downstream cutting region R.

  As shown in FIG. 6, the basic pattern of the mesh blade in the upstream cutting region N is a Y-shaped central cutting edge 35 extending in three directions, and an uneven annular peripheral cutting edge 36 surrounding each central cutting edge 35. And three heart-shaped blade holes 37 surrounded by the two cutting blades 35 and 36. After that, the basic patterns are arranged in a staggered manner in the width direction of the outer blade 16B, and the basic patterns adjacent in the width direction and the bending direction are formed so as to share the peripheral cutting edge 36 with each other. Thus, the inner projecting edge 38 of the peripheral cutting edge 36 is caused to face the two blade holes 37 of the adjacent basic pattern.

  The basic pattern of the mesh blade in the downstream cutting region R is based on the basic pattern of the mesh blade in the upstream cutting region N as a basic shape, and one heart-shaped blade hole 37 positioned on the upper rotation side of the inner blade 22 The remaining two heart-shaped blade holes are divided into two parts, and a total of four small blade holes 40 are formed.

  The basic pattern of the mesh blade in the downstream cutting region R is based on the basic pattern of the mesh blade in the upstream cutting region N as a basic shape, and one heart-shaped blade hole 37 positioned on the upper rotation side of the inner blade 22 And the three small blade holes 44 and 45 disposed on the lower rotation side of the inner blade from the blade hole 37.

  The razor head 2 is provided with an inner blade 22 and outer blades 16F and 16B adjacent to each other in the front-rear direction. The inner blade 22 is rotationally driven in a direction in which the respective upper peripheral surfaces approach each other.

The maximum arrangement number in the bending direction of the basic pattern in the upstream cutting region N of the front outer blade 16F is set to be smaller than the maximum arrangement number in the bending direction of the basic pattern in the upstream cutting region N of the rear outer blade 16B.

  In the present invention, with the arch apex C of the outer blade 16B as a boundary, an upstream cutting region N is provided on the outer blade wall on the upper side of the rotation direction of the inner blade 22 from the boundary, and the rotation direction of the inner blade 22 from the boundary. A downstream cutting region R was provided on the outer blade wall on the lower side. Further, the length of the cutting hole 37 provided in the upstream cutting area N is set to be longer than the bending direction length of the cutting holes 37 and 40 provided in the downstream cutting area R, and the long hair in the upstream cutting area N is set. The scalp hair was effectively captured and primary cut, and the short hair primary cut in the downstream cutting region R could be secondary cut.

  As described above, the cutting direction lengths of the blade holes 37 and 40 are made different between the upstream cutting region N and the downstream cutting region R, and the long hair and the comb hair are primarily cut in one region N, and the other region R When the short hair is secondarily cut, when the rotation direction of the inner blade 22 is opposite to the moving direction of the outer blade 16B along the skin surface (in a forward sled), the long hair and the hair are cut in the upstream cutting region N. It is possible to effectively cut primary hair, and further cut the primary short hair secondarily in the downstream cutting region R to more effectively perform whisker cutting, with the blade holes formed uniformly. Compared to a rotary electric shaver, the beard can be cut in a shorter time.

  Furthermore, in the conventional rotary electric razor having a single blade structure, when the rotation direction of the inner blade and the movement direction of the outer blade along the skin surface are the same (reverse warpage), a feeling of tension is likely to occur. According to the outer blade structure of the present invention, such a feeling of pulling during reverse warping can be eliminated. At the time of reverse warping, the blade holes 37 and 40 having a small length in the bending direction mainly come into contact with the skin surface, so that the distance pulled until the whiskers are captured by the inner blade 22 and cut is reduced. It is because a beard can be cut | disconnected without being accompanied with a pull feeling.

  The basic pattern of the mesh blade in the upstream cutting area N is divided into a central cutting edge 35 extending in three directions, a peripheral annular cutting edge 36 having an uneven shape, and three heart-shaped blade holes surrounded by these cutting edges 35. 37, and this basic pattern is arranged in a staggered manner in the width direction of the outer blade 16, and according to the outer blade structure in which each basic pattern shares the peripheral cutting blade 36 with each other, three heart-shaped Two blades adjacent to the inner projection edge 38 can be cut by attracting a beard from multiple directions by the blade hole 37, and long hairs or comb hairs are forcedly raised at the inner projection edge 38 of the heart-shaped blade hole 37. Since it can be tempted into the hole 37, long hairs and comb hairs can be cut more effectively.

  The basic pattern of the mesh blade in the downstream cutting region R is divided into the region occupied by one heart-shaped blade hole 37 positioned on the upper rotation side of the inner blade 22 and the remaining two heart-shaped blade holes, respectively. Compared with the average value of the bending direction length of the blade hole 37 in the upstream cutting region N, the blade hole 37 in the downstream cutting region R is configured with a total of four small blade holes 40 divided into two. And the average value of the bending direction length of the small blade hole 40 can be made small. Thereby, the movement distance of the whisker in the blade hole 37 and the small blade hole 40 is reduced, and the distance from the contact of the whisker to the inner blade 22 to the contact of the central cutting blade 35 and the peripheral cutting blade 36 is reduced. Since it can be reduced, that is, in the downstream cutting region R, the distance that the whisker is caught by the inner blade 22 and then is cut is reduced so that the whisker is cut without causing a sense of tension. it can. In particular, as described above, during reverse warping, the blade holes 37 and 40 having a small length in the bending direction are in contact with the skin surface, so that the whisker is captured by the inner blade 22 and is then cut. It is possible to cut the beard without a feeling of pulling by reducing the pulled distance. Further, the number of blade holes formed in the downstream cutting region R is greater than the number of blade holes formed in the upstream cutting region N, so that the opportunity for cutting the whiskers is increased, and secondary short hair cutting is effectively performed. be able to.

  A basic shape of the mesh blade in the downstream cutting region R and a basic pattern of the mesh blade in the upstream cutting region N as a basic shape, and a single heart-shaped blade hole 37 positioned on the upper rotation side of the inner blade 22; According to the outer blade structure including the three small blade holes 44 and 45 arranged on the lower rotation side of the inner blade from the blade hole 37, the blade hole 37 and the small blade for the same reason as described above. The movement distance of the whiskers in the blade holes 44 and 45 is reduced, and the distance from the contact of the whisker to the inner blade 22 to the contact with the central cutting blade 35, the peripheral cutting blade 36, or the cutting blade 43 is reduced. Therefore, in the downstream cutting region R, the whisker can be cut without causing a sense of tension by reducing the distance that is pulled until the whisker is captured by the inner blade 22 and is cut. As the number of blade holes formed in the downstream-side cutting region R is larger, the chance of cutting the whiskers is increased, and secondary cutting of short hair can be effectively performed as described above.

  According to the rotary electric razor, in which the inner blade 22 and the outer blades 16F and 16B are provided adjacent to the front and rear in the razor head 2, and the inner blade 22 is rotationally driven so that the respective upper peripheral surfaces approach each other, for example, FIG. 11, during the forward movement in which the electric razor is moved from the lower surface side of the jaw to the lip side, mainly the upstream cutting region N of the rear outer blade 16B and the downstream cutting region R of the front outer blade 16F. During the backward movement in which the beard is cut in a state where it contacts the skin surface and the electric razor is moved from the lip side to the lower surface side of the jaw, the upstream side cutting region N of the front outer blade 16F and the rear side outer The beard can be cut in a state where the downstream cutting region R of the blade 16B is in contact with the skin surface. In other words, in an electric razor with a twin blade structure, primary cutting of long hairs and comb hairs and secondary cutting of primary short hairs are performed reliably in both forward and backward movements. Can be effectively performed, and the time required for cutting the beard can be further shortened.

  In an electric razor having a twin blade structure in which the inner blades 22 are rotationally driven so that the respective upper peripheral surfaces approach each other, the front main blade 13 and the rear main blade 13 are always in a relationship of forward and reverse warpage. become. For example, as shown in FIG. 11, when the rotation direction of the inner blade 22 in the rear main blade 13 and the moving direction P of the upstream cutting region N of the outer blade 16B in contact with the skin surface are opposite (in order) In the main blade 13 on the front side, the rotation direction of the inner blade 22 and the moving direction of the downstream cutting region R of the outer blade 16F that contacts the skin surface are the same (reverse warpage). Further, when the moving direction of the outer cutters 16F and 16B in contact with the skin surface is opposite to that of the arrow P, the upstream cutting area N of the front outer cutter 16F becomes a straight line, and the downstream of the rear outer cutter 16B. The side cutting region R is a reverse warp.

  An outer blade structure in which the number of arrangements in the bending direction of the basic pattern in the upstream cutting region N of the front outer blade 16F is set smaller than the number of arrangements in the bending direction of the basic pattern in the upstream cutting region N of the rear outer blade 16B. As shown in FIG. 11, when the whiskers are cut while moving the electric razor from the lower surface side of the chin to the lip side, the long hairs and the comb hairs are further removed by the upstream cutting region N of the rear outer blade 16B. It is advantageous in that it can be surely captured and primary cut, and the whiskers can be cut effectively in the usage mode of the most frequently used electric razor. In addition, the number of arrangement in the bending direction of the basic pattern in the downstream cutting region R of the front outer blade 16F is larger than the number of arrangement in the bending direction of the basic pattern in the downstream cutting region R of the rear outer blade 16B. Accordingly, the opportunity for cutting the beard can be increased, and secondary cutting of the short hair can be effectively performed.

(Embodiment) FIGS. 1 to 10 show an embodiment of an electric shaver according to the present invention. 2 and 3, the electric razor is composed of a main body 1 and a razor head 2 provided on the main body 1, a secondary battery 3 and a circuit board are arranged inside the main body 1, and inside the razor head 2. A motor 4 and a transmission mechanism for decelerating and transmitting motor power are provided. A switch button 5 for starting the motor and an indicator lamp 6 are provided on the front surface of the main body 1, and a shave blade 7 and a slide knob 8 for pushing the shave blade 7 up to a driving position are provided on the rear surface of the main body 1. Is provided.

  The razor head 2 has a lower half head case 11 and an outer blade holder 12 that is detachably attached to the head case 11 as main outer shells. A motor 4 and a conduction mechanism are arranged. On the upper part of the razor head 2, a pair of front and rear main blades 13 and a center blade 14 disposed between the main blades 13 are provided. The main blade 13 is the center blade by the rotational power of the previous conduction mechanism. Reference numerals 14 are configured to be driven by a reciprocating power system branched from the conduction mechanism.

  The outer blade holder 12 includes an outer case 12a that is detachably attached to the head case 11, and an inner case 12b that is detachably attached to the outer case 12a. A pair of front and rear outer blades 16F and 16B constituting the main blade 13 are supported in an arch shape on the inner case 12b, and the center blade 14 is incorporated between the outer blades 16F and 16B. Reinforcing frames 17 made of a press-molded product are fixed to the front and rear centers of the inner surface of the inner case 12b so as to bridge the left and right side walls of the inner case 12b (see FIG. 5). One end of the outer blades 16F and 16B is connected to the outer blade tension spring 18 incorporated in the reinforcing frame 17, and the other end of the outer blades 16F and 16B is fixed to the front wall and the rear wall of the inner case 12b. .

  The main blade 13 includes an inner blade unit that is detachably attached to the head case 11 and front and rear outer blades 16F and 16B. As shown in FIG. 4, the inner blade unit includes an inverted double-blade inner blade frame 21 and a pair of front and rear inner blades 22 that are rotatably supported by the inner blade frame 21. As shown in FIGS. 1 and 5, the inner blade 22 is configured by twelve small blades 22a embedded and fixed in a spiral shape with respect to a plastic core shaft 22b. As a result, each small blade 22a is inclined obliquely with respect to the axial center of the core shaft 22b as shown in FIGS. 8, 9, and 10 in the deployed state. Both inner blades 22 are configured as rotary blades, and are driven to rotate in opposite directions around the horizontal axis. Specifically, as shown in FIG. 5, the inner blade 22 on the front side (left side in FIG. 5) of the electric razor has a passive gear 23 fixed to the inner blade shaft meshes with the final gear 24 of the previous transmission mechanism. Thus, it is driven to rotate in the clockwise direction. Further, the inner blade 22 on the rear side of the electric razor is driven to rotate in the counterclockwise direction by meshing the passive gear 25 fixed to the inner blade shaft with the final gear 24 of the transmission mechanism via the reversing gear 26. Is done.

  In the electric razor as described above, in order to effectively perform whisker cutting by the main blade 13, the structure of the cutting blades of the outer blades 16F and 16B and the arrangement pattern of the blade holes are configured as follows. There are features. The outer blades 16F and 16B are made of a sheet-like mesh blade formed by electroforming using nickel or a nickel cobalt alloy. The front outer blade 16F and the rear outer blade 16B are slightly different in structure, but the basic structure of both is substantially the same, so the common structure will be described first with the rear outer blade 16B.

  As shown in FIGS. 1 and 10, the sliding contact surface of the rear outer blade 16 </ b> B with the inner blade 22 has an arch apex C as a boundary, and an upstream cutting region N and a downstream cutting region R on both sides thereof. A group of slit blades 30 and a group of heat radiation holes 31 are formed adjacent to the former region N, and a slit blade 32 is formed adjacent to the latter region R. The arch apex C of the outer blade 16B is defined by a vertical line passing through the center of rotation of the inner blade 22.

  As shown in FIG. 7, the basic pattern of the mesh blade in the upstream cutting area N is three Y-shaped central cutting edges 35 extending in three directions from the central portion, and an uneven ring surrounding each central cutting edge 35. , And three heart-shaped blade holes 37 surrounded by the two cutting blades 35 and 36. The angles sandwiched between the individual center cutting edges 35 are set equally, and one of them (a horizontally long cutting edge in FIG. 7) is orthogonal to the rotation center axis of the inner cutting edge 22. The peripheral cutting edge 36 is composed of a partial arc-shaped outer projecting arc portion 36a extending in the circumferential direction from the projecting end of each central cutting blade 35, and a partial arc-shaped inner projecting arc portion 36b that connects adjacent outer projecting arc portions 36a. It is formed in an endless annular shape.

  As shown in FIGS. 8 and 10, the basic patterns are arranged in a staggered manner in the width direction of the outer blade 16 </ b> B, so that the basic patterns adjacent to each other in the width direction and the bending direction share the peripheral cutting edge 36 with each other. Configure as follows. By making the basic pattern a staggered arrangement pattern, the inner protruding edge 38 of the peripheral cutting edge 36 can face the two blade holes 37 of the adjacent basic pattern. The meaning will be described later. 8 to 10, reference numeral 22a denotes the small blade of the inner blade 22, arrows a and b indicate the moving direction of the small blade 22a, and arrow P indicates the reciprocating movement with the outer blades 16F and 16B in close contact with the skin surface. The direction of movement during forward movement when performing whisker cutting is shown (see FIG. 10).

  The basic pattern of the mesh blade in the downstream cutting region R is basically composed of the central cutting edge 35, the peripheral cutting blade 36, and the blade hole 37 in the same manner as the basic pattern of the mesh blade in the upstream cutting region N. The point which bisects each of the blade hole located in the both sides of the central cutting blade 35 orthogonal to the rotation center axis line of the blade 22 into the small blade hole 40 with another cutting blade 39 is different from the previous basic pattern. As a result, the basic pattern in the downstream-side cutting region R includes one heart-shaped blade hole 37 positioned on the upper rotation side of the inner blade 22 and a total of four small blade holes 40, and three more in the center. In addition to the cutting blade 35, two cutting blades 39 are provided. The four small blade holes 40 have the same opening shape and opening dimensions, and are arranged in a petal shape along the cutting blades 35 and 39.

  As shown in FIGS. 8 and 9, the sliding contact surface of the front outer cutter 16F with the inner cutter 22 has an arch apex C as a boundary in the same manner as the previous outer cutter 16B, and upstream cutting regions on both sides thereof. N and the downstream cutting region R are provided. The same is true in that a group of slit blades 30 and a group of heat radiation holes 31 are formed adjacent to the upstream cutting region N, and a slit blade 32 is formed adjacent to the downstream cutting region R. The basic pattern in the upstream cutting area N is composed of three central cutting edges 35, a concave / convex annular peripheral cutting edge 36, and three heart-shaped blade holes 37 surrounded by both cutting edges 35 and 36. The point is the same. Further, the basic pattern in the downstream cutting region R includes one heart-shaped blade hole 37 positioned on the upper rotation side of the inner blade 22 and a total of four small blade holes 40, and further includes three central centers. The point of providing two cutting blades 39 separately from the cutting blades 35 is also the same.

  The front outer blade 16F is different from the rear outer blade 16B because part of the basic pattern in the upstream cutting region N of the rear outer blade 16B exceeds the arch apex C as shown in FIG. In contrast to the formation of the downstream cutting region R, the basic pattern forming region in the upstream cutting region N of the outer cutter 16F on the front side is up to the arch apex C. Specifically, when the number of arrangements in the bending direction of the basic pattern in the upstream upstream cutting area N is two pitches, the number of arrangements in the bending direction of the basic pattern in the upstream upstream cutting area N is 2.5. The pitch is used.

  For example, as shown in FIG. 11, the electric razor configured as described above holds the electric razor in a state where the front surface of the main body 1 faces the user, and the outer blades 16 </ b> F and 16 </ b> B are in close contact with the skin surface. Reciprocate with to cut the beard. During forward movement of the electric razor from the lower surface side of the jaw to the lip side (in the direction of arrow P), mainly the upstream cutting region N of the rear outer blade 16B and the downstream cutting of the front outer blade 16F. The beard is cut while the region R is in contact with the skin surface. When the electric razor is moved backward from the lip side to the lower surface side of the jaw, the upstream cutting region N of the front outer blade 16F and the downstream cutting region R of the rear outer blade 16B are mainly the skin surface. The beard is cut while in contact with

  Incidentally, the average value of the length in the bending direction of the blade hole 37 in the upstream cutting region N of the front and rear outer blades 16F and 16B is the blade hole 37 in the downstream cutting region R of the front and rear outer blades 16F and 16B, and small It is sufficiently larger than the average value of the lengths of the blade holes 40 in the bending direction, and it is easy to capture long hairs and wrinkles that have fallen into the skin. In addition, the beard that has entered each blade hole 37 can be hooked by the inner projecting edge 38 of the peripheral cutting edge 36 to forcibly raise the hair, and can be fed into the two blade holes 37 adjacent to the inner projecting edge 38. Therefore, in the upstream cutting region N, not only normal whiskers can be accurately cut, but also primary hairs and comb hairs can be surely cut and shortened.

  Further, in the blade hole 37 and the small blade hole 40 in the downstream cutting region R of the outer blades 16F and 16B, the average value of the length in the bending direction is small, so that the inside of the blade hole 37 and the small blade hole 40 is reduced. The movement distance of the whiskers is reduced, and therefore the distance from when the whiskers contact the inner blade 22 until they contact the central cutting edge 35 and the surrounding cutting edges 36 is reduced. That is, in the downstream cutting region R, the distance that the whiskers are caught by the inner blade 22 and before being cut can be reduced, and the whiskers can be cut without a feeling of pulling.

  Therefore, at the time of forward movement, the upstream cutting area N of the rear outer blade 16B leads first to cut the whiskers, and then the downstream cutting area R of the front outer blade 16F follows to secondarily cut the whiskers. According to the cutting form, it is possible to effectively perform cutting of long hairs and comb hairs and secondary cutting of primary hairs that have been primarily cut. Similarly, at the time of reverse movement, the whisker is primarily cut or secondary cut at the upstream cutting region N of the front outer blade 16F, and further, the secondary of mainly short hair is cut at the downstream cutting region R of the rear outer blade 16B. Cutting can be performed effectively, and shaving can be completed in a shorter time as a whole.

  In addition to cutting long hairs and comb hairs in the upstream cutting region N of the front and rear outer blades 16F and 16B as described above, if the center blade 14 is disposed between the outer blades 16F and 16B, The hair can be shaved more effectively by cutting the comb hair with the center blade 14.

  In the present invention, whisker cutting can be most effectively performed in an electric shaver having a twin blade structure in which the main blade 13 is provided in front of and behind the razor head 2, but the whisker cutting effect is similarly improved in an electric shaver having a single blade structure. To help. In that case, it is possible to perform primary cutting of long hairs and comb hairs in the upstream cutting region N of the outer blade 16B in the above embodiment and secondary cutting of the short hairs primary cut in the downstream cutting region R.

  In addition to the above embodiment, the basic pattern in the downstream cutting region R can be formed as shown in FIGS. There, the basic pattern in the upstream cutting area N is a basic shape, and one heart-shaped blade hole 37 located on the upper rotation side of the inner blade 22 and the remaining two heart-shaped blade holes occupy it. A total of three small blade holes 44 constituted by dividing the region into three. Specifically, as shown in FIG. 12, the area occupied by the two heart-shaped blade holes located on the lower rotation side of the inner blade 22 is divided into three by two cutting blades 43, and A small blade hole 44 having a shape and one small blade hole 45 having an elliptical shape are formed. More specifically, a heart-shaped blade hole 37 and an elliptical small blade hole 45 are arranged at both ends in the curved direction in the peripheral cutting blade 36, and the trapezoidal small blade hole 44 is placed between the two blade holes 37 and 45 on the left and right sides. Arrange symmetrically to make a basic pattern. By arranging this basic pattern in a staggered manner in the width direction of the outer blade 16B as shown in FIG. 13, a cutting blade in the downstream cutting region R is configured.

  As described above, in the blade hole 37 and the small blade holes 44 and 45 provided in the downstream cutting region R of the outer blades 16F and 16B, the blade hole 37 and the small blade hole are reduced in proportion to the smaller average length in the bending direction. The movement distance of the whisker in the blade holes 44 and 45 can be reduced, and the distance from the contact of the whisker to the inner blade 22 to the contact with the central cutting blade 35, the peripheral cutting blade 36, or the cutting blade 43 is reduced. . Accordingly, in the downstream side cutting region R, the distance that the whiskers are caught by the inner blade 22 and before being cut can be reduced, and the whiskers can be cut without any feeling of pulling.

  14, the area occupied by the two heart-shaped blade holes is divided into three to form three small blade holes 44 and 45 as in FIG. 12, but the cutting blade 35 and the cutting blade 43 are separated from each other. The point of forming the small blade hole 45 in a triangular shape by equalizing the three angles of the sandwiching angle and the angle sandwiched by the two cutting blades 43 is different from the previous blade hole pattern.

  In the above embodiment, the basic pattern is configured by the three central cutting edges 35, the concave and convex peripheral cutting edges 36, and the three heart-shaped blade holes 37 surrounded by the two cutting edges 35 and 36. It is not necessary, and the shape of the blade hole can be changed as necessary, such as a quadrangle, a circle, an oval, and a square shape. Specifically, when the upstream cutting region N and the downstream cutting region R have the same blade hole shape, for example, when the blade hole shape is circular, the former region N is increased in diameter and the latter region R It is better to reduce the diameter of the blade hole. Alternatively, a circular or square blade hole is provided in the upstream cutting region N, and a blade hole such as an ellipse or a square shape is provided in the downstream cutting region R, and the average value of the blade lengths in the bending direction is determined as the upstream cutting region N. And the downstream cutting region R can be made different in size.

It is a vertical side view of a main blade. It is a front view of an electric razor. It is a side view of an electric razor. It is a vertical side view of a razor head. It is an exploded sectional view in the state where the outer blade was separated from the inner blade. It is a top view which shows the basic pattern of the front outer blade. It is a top view which shows the basic pattern of a rear side outer blade. It is a top view which shows the arrangement pattern of the front-and-back outer blade. It is a whole top view of the outer blade on the front side. It is a whole top view of the rear outer blade. It is explanatory drawing which shows the state of the outer blade in use condition. It is a top view which shows another Example of the basic pattern in the downstream cutting area | region R. FIG. It is a top view which shows the arrangement | sequence pattern of a rear side outer blade. It is a top view which shows another Example of the basic pattern in the downstream cutting area | region R. FIG.

Explanation of symbols

13 Main blades 16F and 16B Outer blades 22 Inner blades 35 Central cutting blades 36 Peripheral cutting blades 37 Blade hole N Upstream cutting area R Downstream cutting area C Arch apex

Claims (4)

A rotary electric shaver comprising an inner blade (22) that is driven to rotate and an arch-shaped outer blade (16B) that is in sliding contact with the outer peripheral surface of the inner blade (22),
With the arch apex (C) of the outer blade (16B) as a boundary, an upstream cutting region (N) is provided on the outer blade wall on the upper side in the rotational direction of the inner blade (22) from the boundary, and the inner blade from the boundary. The downstream cutting region (R) is provided in the outer blade wall on the lower side in the rotational direction of (22),
The bending direction length of the blade hole (37) provided in the upstream cutting region (N) is set larger than the bending direction length of the blade hole (37, 40) provided in the downstream cutting region (R) ,
The basic pattern of the mesh blade in the upstream cutting area (N) is a Y-shaped central cutting edge (35) extending in three directions, and an uneven annular peripheral cutting edge (36) surrounding each central cutting edge (35). ) And three heart-shaped blade holes (37) surrounded by these two cutting edges (35, 36),
The basic patterns are arranged in a staggered manner in the width direction of the outer blade (16B), and the basic patterns adjacent to each other in the width direction and the bending direction are formed so as to share the peripheral cutting blade (36) with each other.
The inner edge (38) of the peripheral cutting edge (36) faces the two blade holes (37) of the adjacent basic pattern,
One heart located on the upper rotation side of the inner blade (22), wherein the basic pattern of the mesh blade in the downstream cutting region (R) is based on the basic pattern of the mesh blade in the upstream cutting region (N). And a total of four small blade holes (40) configured by dividing the remaining two heart-shaped blade holes into two, respectively. Rotary electric razor. A rotary electric shaver comprising an inner blade (22) that is driven to rotate and an arch-shaped outer blade (16B) that is in sliding contact with the outer peripheral surface of the inner blade (22),
With the arch apex (C) of the outer blade (16B) as a boundary, an upstream cutting region (N) is provided on the outer blade wall on the upper side in the rotational direction of the inner blade (22) from the boundary, and the inner blade from the boundary. The downstream cutting region (R) is provided in the outer blade wall on the lower side in the rotational direction of (22),
The bending direction length of the blade hole (37) provided in the upstream cutting region (N) is set larger than the bending direction length of the blade hole (37, 40) provided in the downstream cutting region (R),
The basic pattern of the mesh blade in the upstream cutting area (N) is a Y-shaped central cutting edge (35) extending in three directions, and an uneven annular peripheral cutting edge (36) surrounding each central cutting edge (35). ) And three heart-shaped blade holes (37) surrounded by these two cutting edges (35, 36),
The basic patterns are arranged in a staggered manner in the width direction of the outer blade (16B), and the basic patterns adjacent to each other in the width direction and the bending direction are formed so as to share the peripheral cutting blade (36) with each other.
Inner flange of the peripheral cutting edge (36) (38), Ri Oh to face the two blade holes of the adjacent basic pattern (37),
One heart located on the upper rotation side of the inner blade (22), wherein the basic pattern of the mesh blade in the downstream cutting region (R) is based on the basic pattern of the mesh blade in the upstream cutting region (N). It is configured to include a shaped blade hole (37) and three small blade holes (44, 45) arranged on the lower rotation side of the inner blade from the blade hole (37). Rotary electric razor. The razor head (2) is provided with an inner blade (22) and an outer blade (16F, 16B) adjacent to each other in the front-rear direction,
The rotary electric shaver according to claim 1 or 2, wherein the inner blade (22) is rotationally driven in a direction in which each upper peripheral surface approaches . The maximum arrangement number in the bending direction of the basic pattern in the upstream cutting area (N) of the front outer blade (16F) is equal to the bending direction of the basic pattern in the upstream cutting area (N) of the rear outer blade (16B). The rotary electric shaver according to claim 3 , wherein the rotary shaver is set to be smaller than the maximum number of arrays .

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