Hair clippers

Abstract

When cutting hair with the blade facing in the opposite direction, it is easier to apply force regardless of the direction of the haircut, making it easier to cut hair. [Solution] The gripping portion 21 is provided with a first surface 211 to a fourth surface 214, corresponding to the first surface 351 to the fourth surface 354 of the head portion 3. In this structure, when attempting to cut hair using any surface of the head portion 3 as the skin contact surface, there is a opposite surface of the gripping portion 21 facing away from the skin contact surface. Therefore, regardless of which surface is used for cutting hair, it becomes possible to place a finger F on the opposite surface of the gripping portion 21 and cut hair, making it easier to apply force and cut hair easily.

Description

Technical Field

[0001] The present disclosure relates to a hair cutter capable of cutting hair at multiple lengths.

Background Art

[0002] Conventionally, in Patent Document 1, a hair styling tool with double blades having blade tips facing in opposite directions has been proposed. In this hair styling tool, the lengths of the teeth of the comb part are made different, and it is possible to cut hair of different lengths with each blade tip.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, although the hair styling tool of Patent Document 1 can cut hair of different lengths, since the handle part has an elliptical cross-sectional shape, no matter which blade tip is used for hair cutting, it is not structured to be easy to apply force, and hair cannot be easily cut.

[0005] An object of the present disclosure is to make it easy to apply force and easily cut hair in any direction when cutting hair with a blade part whose blade tips are directed in opposite directions.

Means for Solving the Problems

[0006] The hair cutter according to the first aspect of the present disclosure is composed of a rod-shaped member with one direction as the longitudinal direction, and has a handle part (2) having a tip part (22) and a rear end part (23) on the side opposite to the tip part, and a head part (3) disposed on the tip part side of the handle part. The head portion is, The first blade (31) includes a planar first blade body (311) with a first cutting edge (311a) facing in one direction perpendicular to the longitudinal direction, and a first comb structure (312) having a plurality of first comb teeth (312a) arranged at a first interval (S1) covering the first blade body, and the first blade portion (31) cuts hair that passes through the first comb teeth with the first blade body, The device includes a planar second blade body (321) with a second cutting edge (321a) directed toward the other side in the width direction, and a second comb structure (322) having a plurality of second comb teeth (322a) covering the second blade body, arranged at a second interval (S2) narrower than the first interval, and a second blade portion (32) that is shorter than the first blade portion and cuts hair that has passed through the second comb teeth with the second blade body in a range narrower than the range of hair cutting by the first blade body, In the first comb structure, the portions of the plurality of first comb teeth covering the first blade are designated as peaks, and the portions between the plurality of first comb teeth that expose the first blade are designated as valleys, and in the second comb structure, the portions of the plurality of second comb teeth covering the second blade are designated as peaks, and the portions between the plurality of second comb teeth that expose the second blade are designated as valleys. On one side and the other side of the first blade, virtual planes passing through the ridges of the peaks formed by each of the plurality of first comb teeth and inclined with respect to the first blade are defined as the first head surface (351) and the second head surface (352), respectively. On one and the other side of the second blade, virtual planes passing through the ridges of the peaks formed by each of the plurality of second comb teeth and inclined relative to the second blade are defined as the third head surface (353) and the fourth head surface (354), respectively. The handle portion has a first handle surface (211) corresponding to the first surface of the head, a second handle surface (212) corresponding to the second surface of the head, a third handle surface (213) corresponding to the third surface of the head, and a fourth handle surface (214) corresponding to the fourth surface of the head. The first surface of the handle and the first surface of the head face in the same direction, while the fourth surface of the handle and the fourth surface of the head face in opposite directions, and the second surface of the handle and the second surface of the head face in the same direction, while the third surface of the handle and the third surface of the head face in opposite directions. This configuration allows users to place their fingers on the opposite side of the handle when cutting hair, making it easier to apply pressure and cut hair smoothly.

[0007] The reference numerals in parentheses attached to each component indicate an example of the correspondence between that component and the specific components described in the embodiments described later. [Brief explanation of the drawing]

[0008] [Figure 1] This is a front view of a hair cutter according to a first embodiment of the present disclosure. [Figure 2] Figure 1 is a bottom view of the hair cutter. [Figure 3] (a) is an exploded view of the handle tip and head in the first position, and (b) is an exploded view of the handle tip and head in the second position. [Figure 4] This is a cross-sectional view of the length adjustment mechanism. [Figure 5] (a) is a partial cross-sectional view of the tip of the handle and the head of the handle in the first position, and (b) is a partial cross-sectional view of the tip of the handle and the head in the second position. [Figure 6] (a) and (b) are bottom views of a hair cutter showing how it works when moving in the direction of arrows A1 and A2, respectively. [Modes for carrying out the invention]

[0009] The embodiments of this disclosure will be described below with reference to the drawings. In each embodiment, including the other embodiments described below, parts that are the same or equivalent to each other will be denoted by the same reference numerals.

[0010] (First Embodiment) Hereinafter, the hair cutter 1 according to the first embodiment of the present disclosure will be described with reference to FIGS. 1 to 6.

[0011] 〔Configuration of Hair Cutter 1〕 The hair cutter 1 shown in FIGS. 1 to 6 realizes haircuts of different lengths by combining two types of razors. The hair cutter 1 can be used for haircuts of the whole body, and can be used, for example, for a hair clipper that performs a relatively long haircut such as on the arms and legs, or for a hair shaver that performs a relatively short haircut such as in a delicate zone such as the VIO zone. Note that the V zone indicates the part below the navel called the bikini line, the I zone indicates the part from around the genitals to the anus, and the O zone indicates the part around the anus.

[0012] In the drawings attached to this specification, the X-axis, Y-axis, and Z-axis are shown. As shown in FIG. 1, when the hair cutter 1 is viewed from the front, the vertical direction, that is, the longitudinal direction, is the X-axis, the left-right direction of the hair cutter 1 orthogonal to the X-axis, that is, the width direction, is the Y-axis, and the thickness direction of the hair cutter 1 orthogonal to the X-axis and Y-axis is called the Z-axis.

[0013] As shown in FIGS. 1 to 6, the hair cutter 1 has a handle portion 2 and a head portion 3 provided with a first blade portion 31 and a second blade portion 32.

[0014] 〔Configuration of Handle Portion 2〕 The handle portion 2 is composed of a rod-shaped member with one direction as the longitudinal direction, has a rod-shaped gripping portion 21, has one end side in the X-axis direction in the gripping portion 21 as the tip portion 22, and the opposite side as the rear end portion 23, and the head portion 3 is attached to the tip portion 22. The handle portion 2 is made of, for example, resin.

[0015] The gripping portion 21 has a first center line L1 along the longitudinal direction. The shape of the gripping portion 21 is such that the cross-sectional shape with the longitudinal direction as the normal direction is hexagonal, specifically, a flat hexagonal shape with each corner rounded as shown in FIG. 2, and a hexagonal shape is formed around the first center line L1. The dimensions in each radial direction around the first center line L1 in the gripping portion 21 gradually increase from the tip portion 22 toward the rear end portion 23 along the first center line L1, but they may also be the same.

[0016] The gripping portion 21 has six surfaces, namely, a first surface 211 to a sixth surface 216. These first surfaces 211 to 216 correspond to the handle first surface to the handle sixth surface. The first surface 211 to the fourth surface 214 are surfaces corresponding to the first surface 351 to the fourth surface 354, which will be described later, in the head portion 3. The fifth surface 215 is a surface between the first surface 211 and the second surface 212, and the sixth surface 216 is a surface between the third surface 213 and the fourth surface 214. Details of these first surfaces 211 to 216 will be described later.

[0017] As shown in FIG. 1, a plurality of grooves 21a may be provided in the gripping portion 21 along a direction inclined with respect to the first center line L1 to form an anti-slip structure. When the grooves 21a are provided, the surfaces connecting the portions other than the grooves 21a are the first surface 211 to the sixth surface 216.

[0018] The tip portion 22 is a portion that supports the head portion 3. In the present embodiment, the tip portion 22 is housed in the head portion 3 and constitutes a part of a length adjustment mechanism 313 provided in the head portion 3. As shown in FIG. 3, openings 221, 222, etc. are formed on the gripping portion 21 side and the opposite side of the tip portion 22. Further, between the two openings 221, 222, a locking portion 223 and a slide guide 224 that constitute a part of the length adjustment mechanism 313 are formed. The locking portion 223 has a semicircular cross-section as shown in FIG. 4 and is a part of the spring mechanism in the length adjustment mechanism 313. The slide guide 224 is formed by a groove along the Y-axis direction. Here, a rail 224a extending in the Y-axis direction is provided inside the groove constituting the slide guide 224 to make it easier to guide.

[0019] [Configuration of Head Unit 3] As shown in Figure 1, the head portion 3 comprises a first blade portion 31 and a second blade portion 32. The outer shape of the head portion 3 is formed by a cover portion 34. As shown in Figures 1 to 3, the cover portion 34 has a first cover 341 and a second cover 342. As shown in Figure 2, the head portion 3 is fixed to the tip portion 22 by fitting projections 342a and 342b protruding from the inner wall of the second cover 342 into the openings 221 and 222 of the tip portion 22, and by fitting or joining the outer edges of the first cover 341 and the second cover 342.

[0020] The first cover 341 and the second cover 342 form the outer shape of the head portion 3, but as will be described later, they also constitute the first comb structure 312 in the first blade portion 31 and the second comb structure 322 in the second blade portion 32.

[0021] The first blade portion 31 and the second blade portion 32 are positioned on one side and the other side in the Y-axis direction, that is, on the left and right sides in Figure 1, enabling hair cutting of different lengths.

[0022] The first blade portion 31 is positioned on one side of the head portion 3 in the Y-axis direction and includes a first blade body 311, a first comb structure 312, and a length adjustment mechanism 313.

[0023] The first blade body 311 is planar, for example, substantially rectangular, with one side forming the first cutting edge 311a, and one of its longer sides is the first cutting edge 311a, which is oriented in one direction along the Y axis. The first cutting edge 311a is arranged parallel to, for example, the first center line L1.

[0024] The first comb structure 312 is formed from a part of the cover portion 34 and covers the first cutting edge 311a in a comb-like manner. The first comb structure 312 is formed by arranging a plurality of first comb teeth 312a at equal intervals of a first interval S1 along the edge of the cover portion 34 that aligns with the first center line L1 on one side in the Y-axis direction. Specifically, one side of the first cutting edge 311 is covered by the portion of the first comb structure 312 that is made up of the first cover 341, and the other side is covered by the portion of the first comb structure 312 that is made up of the second cover 342.

[0025] The first comb structure 312 has multiple first comb teeth 312a that cover the first cutting edge 311a, which are called peaks, and portions between the multiple first comb teeth 312a that expose the first cutting edge 311a, which are called valleys. Hair passing through the valleys is cut by the first blade body 311. The shortest distance between the ridge of the peaks of the first comb teeth 312a and the first cutting edge 311a determines the length of hair to be cut by the first blade portion 31. The first comb teeth 312a protrude beyond the first cutting edge 311a in one direction along the Y axis, preventing the user's skin from touching the first cutting edge 311a, while also covering one side and the other side of the first blade body 311. The tip of the first comb teeth 312a on the second cover 342 side protrudes more than the tip on the first cover 341 side, and the tip of the protruding part is given an R shape, covering the tip on the first cover 341 side. This structure prevents the tip of the first comb teeth 312a from catching on the user's skin during use.

[0026] As shown in Figure 2, among the multiple first comb teeth 312a, the first surface 351 is formed by a virtual plane that passes through the ridge line formed by the portion on the first cover 341 side and is inclined with respect to the first blade body 311, and the second surface 352 is formed by a virtual plane that passes through the ridge line formed by the portion on the second cover 342 side and is inclined with respect to the first blade body 311. When cutting hair using the first blade portion 31, if the user is left-handed, the first surface 351 is the skin contact surface that comes into contact with the user's skin, and if the user is right-handed, the second surface 352 is the skin contact surface that comes into contact with the user's skin.

[0027] The length adjustment mechanism 313 shown in Figure 3 adjusts the length of hair to be cut by moving the first cutting edge 311a relative to the tip of the first comb teeth 312a in the Y-axis direction. Specifically, as shown in Figures 3 and 4, the length adjustment mechanism 313 has a first clamping portion 313a that abuts against one side of the first blade body 311 and a second clamping portion 313b that abuts against the other side of the first blade body 311, and these clamp the first blade body 311. As shown in Figure 4, the first clamping portion 313a and the second clamping portion 313b are provided with a fitting convex portion 313i and a concave portion 313j, and the first blade body 311 is fixed to the first clamping portion 313a and the second clamping portion 313b by inserting the convex portion 313i into the through hole 311b formed in the first blade body 311 and engaging with the concave portion 313j.

[0028] Furthermore, the length adjustment mechanism 313 is integrally formed with the first clamping portion 313a and is provided with a locking portion 313c that extends from the first clamping portion 313a in a direction away from the first blade body 311. The locking portion 313c has a first recess 313d with a semicircular cross-section that is recessed from the first clamping portion 313a, a protrusion 313e located further away from the first clamping portion 313a than the first recess 313d, and a second recess 313f located on the opposite side of the protrusion 313e from the first recess 313d, aligned in the Y-axis direction. In addition, the dimension of the locking portion 313c in the X-axis direction matches the dimension of the slide guide 224 in the same direction, and although not shown, one surface on the second clamping portion 313b side is provided with a groove extending in the Y-axis direction corresponding to the rail 224a. The locking portion 313c and the locking portion 223 provided on the tip portion 22 described above constitute a spring mechanism, enabling relative movement of the first cutting edge 311a in the Y-axis direction with respect to the tip of the first comb teeth 312a.

[0029] Specifically, as shown in Figure 3, an adjustment projection 313h is formed on one side of the first clamping portion 313a facing the first cover 341, and as shown in Figure 1, a through hole 341a is formed in the first cover 341 through which the adjustment projection 313h is inserted. Within the through hole 341a, the adjustment projection 313h is movable in the Y-axis direction and can be switched between a first position farther from the second blade portion 32 and a second position closer to it. That is, at least one of the locking portion 223 and the locking portion 313c undergoes elastic deformation, allowing the locking portion 223 to ride over the convex portion 313e, enabling movement from the first recess 313d to the second recess 313f, and vice versa.

[0030] When switching between the first and second positions, the locking portion 313c slides within the slide guide 224, causing the first blade body 311 to move in the Y-axis direction together with the length adjustment mechanism 313. At this time, since the X-axis dimensions of the locking portion 313c and the slide guide 224 are matched, the first blade body 311 can be moved accurately without misalignment. Furthermore, by providing a rail 224a and allowing the locking portion 313c to slide within a groove formed on one side of the second clamping portion 313b, sliding resistance can be reduced, making it possible to switch positions easily. In addition, if the locking portion 223 or the locking portion 213c is made of rubber, the locking portion 223 will be able to easily overcome the protrusion 313e, making it possible to switch positions even more easily.

[0031] In the first position, the locking portion 223 is located within the second recess 313f. In this position, as shown in Figure 5(a), the portions of the first clamping portion 313a and the second clamping portion 313b that are on the side of the first cutting edge 311a abut against the inner wall surface of the cover portion 34, and the first blade body 311 is held without any looseness. Therefore, when cutting hair with the first blade body 311, even if a force is applied in the direction of pushing the first cutting edge 311a, the inner wall surface of the second recess 313f abuts against the locking portion 223, and the force is absorbed, making it possible to cut hair. In the first position, the first cutting edge 311a is located closer to the tip of the first comb teeth 312a than in the second position, so it is possible to cut relatively short hair.

[0032] In the second position, the locking portion 223 is located within the first recess 313d. In this position, as shown in Figure 5(b), the portion of the first clamping portion 313a and the second clamping portion 313b on the side of the first cutting edge 311a is separated from the inner wall surface of the cover portion 34. However, the locking portion 223 fits into the semicircular cross-section of the first recess 313d, holding the first blade body 311 without any wobbling. Therefore, when cutting hair with the first blade body 311, even if a force is applied in the direction of pushing the first cutting edge 311a, the inner wall surface of the first recess 313d contacts the locking portion 223, absorbing the force and enabling hair cutting. In the second position, the first cutting edge 311a is located further away from the tip of the first comb teeth 312a than in the first position, allowing for relatively longer hair cuts.

[0033] Here, when switching from the first position to the second position, the amount of movement M of the first blade 311 shown in Figure 5 is set to, for example, 1.8 mm. In this case, the change in the shortest distance between the ridge of the first comb teeth 312a and the first cutting edge 311a between the first and second positions can be made to, for example, about 0.5 mm, making it possible to finely adjust the length of the cut hair in two stages.

[0034] The second blade portion 32 is located on the other side of the head portion 3 in the Y-axis direction and has a second blade body 321 and a second comb structure 322.

[0035] The second blade body 321 is planar in shape, having one side that forms the second cutting edge 321a, for example, as shown in Figure 3, and is roughly rectangular in shape, with one long side forming the second cutting edge 321a, and facing in the other direction in the Y-axis direction. The second cutting edge 321a is arranged parallel to the first center line L1, for example. An oval-shaped slot 321b is formed inside the second blade body 321, with the X-axis direction as its major axis, and the engaging projection 342c of the second cover 342 is inserted into the slot 321b, so that it is held securely by the second cover 342. The second blade body 321 is then clamped by attaching the first cover 341 to the second cover 342.

[0036] The second comb structure 322 is formed from a part of the cover portion 34 and covers the second cutting edge 321a in a comb-like manner. The second comb structure 322 is formed by arranging a plurality of second comb teeth 322a at equal intervals with a second interval S2 that is narrower than the first interval S1, along the edge of the cover portion 34 that is aligned with the first center line L1 on the other side in the Y-axis direction. Specifically, one side of the second cutting edge 321 is covered by the portion of the second comb structure 322 that is composed of the first cover 341, and the other side is covered by the portion of the second comb structure 322 that is composed of the second cover 342.

[0037] The second comb structure 322 has multiple second comb teeth 322a covering the second cutting edge 321a, which are called peaks, and the parts between the multiple second comb teeth 322a that expose the second cutting edge 321a are called valleys. Hair passing through the valleys is then cut by the second blade 321. The distance between the ridge of the peak of the second comb teeth 322a and the second cutting edge 321a is the shortest possible distance, which determines the length of hair cut by the second blade 32. Since the distance from the second cutting edge 321a to the tip of the second comb tooth 322a is shorter than the distance from the first cutting edge 311a to the tip of the first comb tooth 312a, the second blade 32 can cut hair shorter than the first blade 31. The second comb teeth 322a protrude beyond the second cutting edge 321a in the opposite direction in the Y-axis direction, preventing the user's skin from touching the second cutting edge 321a, while also covering one and the other side of the second blade body 321. As shown in Figure 2, the tip of the second comb teeth 322a on the second cover 342 side protrudes beyond the tip on the first cover 341 side, and the tip of the protruding portion is given an R-shape to cover the tip on the second cover 342 side, thereby preventing the tip of the second comb teeth 322a from catching on the user's skin during use.

[0038] Of these multiple second comb teeth 322a, the third surface 353 is formed by a virtual plane that passes through the ridge line formed by the portion on the second cover 342 side and is inclined with respect to the second blade body 321, and the fourth surface 354 is formed by a virtual plane that passes through the ridge line formed by the portion on the second cover 342 side and is inclined with respect to the second blade body 321. When cutting hair using the second blade portion 32, if the user is right-handed, the third surface 353 is the skin contact surface that comes into contact with the user's skin, and if the user is left-handed, the fourth surface 354 is the skin contact surface that comes into contact with the user's skin.

[0039] The head portion 3 has a second center line L2 that runs along its longitudinal direction. When viewed from the X-axis direction, the head portion 3 has a flattened hexagonal shape as shown in Figure 2, and the hexagonal shape is formed around the second center line L2, and in addition to the first to fourth surfaces 351 to 354 described above, it has six surfaces in total: a fifth surface 355 and a sixth surface 356. These first surfaces 351 to 356 correspond to the first to sixth surfaces of the head. The first to fourth surfaces 351 to 354 correspond to the first to fourth surfaces 211 to 214 of the gripping portion 21, respectively. The fifth surface 355 is the surface between the first surface 351 and the third surface 353, and the sixth surface 356 is the surface between the second surface 352 and the fourth surface 354. Details of these first to sixth surfaces 356 will be described later.

[0040] In this way, the hair cutter 1 according to this embodiment is configured. Next, the first surface 211 to the sixth surface 216 of the gripping portion 21 and the first surface 351 to the sixth surface 356 of the head portion 3 will be described.

[0041] As described above, the first to fourth surfaces 211 to 214 of the gripping portion 21 and the first to fourth surfaces 351 to 354 of the head portion 3 are corresponding surfaces. The pairs of the first surface 211 and the first surface 351, the second surface 212 and the second surface 352, the third surface 213 and the third surface 353, and the fourth surface 214 and the fourth surface 354 are all facing in approximately the same direction and opposite to the first centerline L1 and the second centerline L2. Each surface in each pair is inclined in approximately the same direction with respect to the XY plane passing through the first centerline L1 and the second centerline L2. The XY plane is parallel to one surface and the other surface of the first blade body 311 and the second blade body 321.

[0042] The first surface 351 and the second surface 352 are inclined in opposite directions with respect to one surface of the first blade 311, and the inclination angle is set to approximately 15 degrees with respect to one surface of the first blade 311, which is an angle that facilitates hair cutting. The first surface 211 and the first surface 351 are parallel or the angle between them is less than 5 degrees. The second surface 212 and the second surface 352 are also parallel or the angle between them is less than 5 degrees.

[0043] The third surface 353 and the fourth surface 354 are inclined in opposite directions with respect to one surface of the second blade 321, and the inclination angle is set to approximately 30 degrees with respect to one surface of the second blade 321, which is an angle that facilitates hair cutting. The third surface 213 and the third surface 353 are parallel or the angle between them is less than 5 degrees. The fourth surface 214 and the fourth surface 354 are also parallel or the angle between them is less than 5 degrees.

[0044] Furthermore, the hexagonal shape formed by the gripping portion 21 of the handle portion 2 and the hexagonal shape formed by the head portion 3 are positioned so as to be offset by 90 degrees when viewed from the longitudinal direction. Specifically, the diagonal D1 passing between the first surface 351 and the second surface 352 of the head portion 3 and between the second center line L2 and between the third surface 353 and the fourth surface 354 intersects at 90 degrees with respect to the diagonal D1 passing between the first center line L1 and the second surface 212 and the fourth surface 214 of the gripping portion 21. The distance between the fifth surface 355 and the sixth surface 356 of the head portion 3, that is, the dimension of the head portion 3 in the Z-axis direction, is set to a thickness of, for example, about 10 mm, making it easy to cut hair while conforming to the body and easy to handle in narrow areas. In addition, as shown in Figure 2, in the Z-axis direction, the position of the first surface 211 and the third surface 213 of the handle portion 2 is aligned with the position of the fifth surface 355 of the head portion 3, and the position of the second surface 212 and the fourth surface 214 of the handle portion 2 is aligned with the position of the sixth surface 356 of the head portion 3. As a result, the handle portion 2 is also thin in the Z-axis direction and has a structure that does not interfere with the handling of the head portion 3.

[0045] [How to use Hair Cutter 1] Next, we will explain how to use the hair cutter 1. As mentioned above, the hair cutter 1 is equipped with two types of razors, a first blade 31 and a second blade 32, which are positioned facing in opposite directions. Therefore, the user can use the type of razor appropriate for the area to be cut.

[0046] For example, there is a desire to cut the hair in the VIO zone shorter. In such cases, the second blade 32 is used. For example, as shown in Figure 6(a), the fourth surface 354 of the head 3 is used as the skin contact surface, and the head 3 is moved in the direction of arrow A1. This allows the hair that has passed through the second comb teeth 322a to be cut by the second blade 321. Since the distance from the tip of the second comb teeth 322a to the tip of the second blade 321a is shortened, the VIO zone can be cut shorter. This makes it possible to keep the VIO zone clean.

[0047] In this case, since the hexagonal shape formed by the clamping portion 2 and the hexagonal shape formed by the head portion 3 are positioned with a 90-degree offset, as shown in Figure 6(a), the first surface 211 of the gripping portion 21 exists as the opposite surface to the fourth surface 354, which is the skin contact surface. Therefore, it becomes possible to place a finger F on the first surface 211 and cut hair, making it easier to apply force and cut hair easily.

[0048] On the other hand, there is a demand for haircuts that leave the arms and legs relatively long. In such cases, the first blade portion 31 is used. For example, as shown in Figure 6(b), the second surface 352 of the head portion 3 is used as the skin contact surface, and the head portion 3 is moved in the direction of arrow A2. This allows the hair that has passed through the first comb teeth 312a to be cut by the first blade body 311. Furthermore, since the distance from the tip of the first comb teeth 312a to the first blade tip 311a is longer than that of the second blade portion 32, the hair on the arms and legs can be cut to a relatively long length. This makes it possible to thin the hair on the arms and legs to a neat length while leaving some length, and also makes it possible to give the arms and legs a clean appearance.

[0049] In this case as well, since the hexagonal shape formed by the clamping part 2 and the hexagonal shape formed by the head part 3 are positioned with a 90-degree offset, as shown in Figure 6(b), the third surface 213 of the gripping part 21 exists as the opposite surface to the second surface 352, which is the skin contact surface. Therefore, it becomes possible to place a finger F on the third surface 213 and cut hair, making it easier to apply force and cut hair easily.

[0050] Additionally, if you wish to adjust the length of the hair on the arms or legs, you can move the adjustment projection 313h along the Y-axis and adjust it to your preferred position, either the first or second position.

[0051] Although this explanation uses the second surface 352 or the fourth surface 354 as the skin contact surface as an example, the same applies when the first surface 351 or the third surface 353 is the skin contact surface. Even when attempting to cut hair with any surface of the head portion 3 as the skin contact surface, there is a opposite surface facing away from the skin contact surface on the gripping portion 21. Therefore, it becomes possible to place a finger F on the opposite surface of the gripping portion 21 and cut hair, making it easier to apply force and cut hair easily.

[0052] [Effects of hair cutter 1] (1) In this embodiment, the hair cutter 1 has a gripping portion 21 with a first surface 211 to a fourth surface 214 corresponding to the first surface 351 to the fourth surface 354 of the head portion 3. With this structure, when attempting to cut hair using any surface of the head portion 3 as the skin contact surface, there is a opposite surface on the gripping portion 21 that faces away from the skin contact surface. Therefore, regardless of which surface is used for cutting hair, it becomes possible to place a finger F on the opposite surface of the gripping portion 21 and cut hair, making it easier to apply force and cut hair easily.

[0053] Specifically, the corresponding surfaces are either parallel or the angle between them is less than 5 degrees. Therefore, the angle between the opposite surface and the skin contact surface is less than 10 degrees, making it easy to apply pressure by placing a finger F on the opposite surface. Furthermore, even if a haircut is performed with the skin contact surface touching the skin, safety is ensured because the first comb structure 312 and the second comb structure 322 cover the first cutting edge 311a and the second cutting edge 321a.

[0054] (2) The external shape of the gripping portion 21, that is, the cross-sectional shape with the first center line L1 as the normal direction, is a hexagonal shape composed of the first surface 211 to the sixth surface 216. The external shape of the head portion 3, that is, the cross-sectional shape with the second center line L2 as the normal direction, is a hexagonal shape composed of the first surface 351 to the sixth surface 356. In addition, the hexagonal shape composed of the gripping portion 2 and the hexagonal shape composed of the head portion 3 are offset by 90 degrees.

[0055] This allows for a shape that makes it easier to maintain contact with the skin when pushing the head 2 in the direction of hair cutting or pulling it in the opposite direction, and also makes it easier to apply force to the handle 2. Furthermore, the hexagonal shape fits comfortably in the hand and has a good design, allowing the side of the head 3 opposite the skin contact surface to be configured as the gripping part 21.

[0056] (3) A length adjustment mechanism 313 is provided, allowing the first blade 311 to be moved in the Y-axis direction. This makes it possible to cut hair at two different lengths using the first blade 31. Furthermore, a spring mechanism consisting of a locking part 223 provided on the tip 22 and a locking part 313c integrated with the first blade 311 enables the movement of the first blade 311. When reduced, the adjustment projection 313h is operated, causing the locking part 223 to overcome the protrusion 313e, thereby enabling switching between the first and second positions. As a result, the load when the locking part 223 overcomes the protrusion 313e is applied to the hand operating the adjustment projection 313h, providing a moderate click sensation. Furthermore, the length of the haircut of the first blade 31 can be adjusted with a one-touch switch by simply changing the position of the adjustment projection 313h while holding the handle 2 in your hand. In addition, safety is ensured because the first blade tip 311a is covered by the first comb structure 312 when switching.

[0057] (4) By providing the length adjustment mechanism 313, the first comb structure 312 enables hair cutting at two different lengths, and together with the second comb structure 322, it enables hair cutting at three different lengths. This allows for hair cutting at various lengths to suit the user's preferences for each area of ​​hair being cut. In addition, the first blade section 31 can function as a thinning blade for relatively long hair cuts, and the second blade section 32 can function as a full shave for relatively short hair cuts. The angles of the first surface 351 and the second surface 352 relative to the first blade body 311, and the angles of the third surface 353 and the fourth surface 354 relative to the second blade body 321 are set to facilitate the realization of each function. This makes it possible to adjust the thinning amount to the desired length or to perform a full shave.

[0058] (5) The range in which hair can be cut by the first blade 31 and the range in which hair can be cut by the second blade 32 are made smaller in the X-axis direction than the range in which hair can be cut by the first blade 31. Therefore, it is possible to use the device differently depending on whether you want to cut a wide area or a narrow area.

[0059] Furthermore, since one hair clipper can cut hair to multiple lengths, there is no need to prepare multiple razors for different lengths. This also contributes to reducing waste and aligns with "SDG Goal 12. Responsible Consumption and Production, Target 12.5: By 2030, substantially reduce waste generation through prevention, reduction, recycling and reuse."

[0060] (6) The hair cutter 1 has a three-part body, as if the body of the hair cutter 1 were divided into three parts by the first blade section 31, the second blade section 32, and the handle section 2. This makes it easy to understand each function at a glance while also giving the impression of being multi-functional due to its complex shape. In addition, the cross-sectional shape of the head section 3 and the handle section 2 is hexagonal, giving it a sharp styling that can satisfy the preferences of users who like sharp products.

[0061] (Other embodiments) This disclosure is not limited to the embodiments described above, and can be modified as appropriate within the scope of the claims. It goes without saying that, in the embodiments described above, the elements constituting the embodiments are not necessarily essential unless explicitly stated to be particularly essential or considered fundamentally essential. Furthermore, in the embodiments described above, when numerical values ​​such as the number, number of elements, quantity, or range are mentioned, the embodiments are not limited to those specific numbers unless explicitly stated to be particularly essential or considered fundamentally limited to those specific numbers. Also, in the embodiments described above, when the shape, positional relationship, etc., of the elements are mentioned, the embodiments are not limited to those shapes, positional relationships, etc., unless explicitly stated or considered fundamentally limited to those specific shapes, positional relationships, etc.

[0062] (1) For example, in the above embodiment, the first to fourth surfaces 351 to 354 of the head portion 3 that are in contact with the skin are configured as planar surfaces inclined with respect to the first blade 311 or the second blade 321. However, other shapes are also acceptable, such as curved surfaces that gently bulge on the opposite side of the first center line L1. However, configuring the parts of the first to fourth surfaces 351 to 354 that are in contact with the skin as planar surfaces makes it easier to adjust the angle of the first blade 311 or the second blade 321 with respect to the skin.

[0063] Furthermore, although the fifth surface 355 and the sixth surface 356 of the head portion 3 are also flat, these surfaces are not used as skin contact surfaces, so their shape is arbitrary; they can be flat, curved surfaces that bulge outwards from the second center line L2, or curved surfaces that concave towards the second center line L2.

[0064] (2) Similarly, in the above embodiment, the surfaces connecting the first surface 211 to the fourth surface 214 of the gripping portion 21 that are not the anti-slip grooves 21a are flat. However, other shapes are also acceptable, such as curved surfaces that gently bulge on the opposite side of the first center line L1. However, if the first surface 211 to the fourth surface 214 are flat, it becomes easier to apply force when cutting hair.

[0065] Furthermore, although the fifth surface 215 and the sixth surface 216 of the gripping portion 21 are also flat, these surfaces are not the parts where you want to place your finger F and apply force, so their shape is arbitrary. They can be flat, curved surfaces that bulge outwards from the first center line L1, or curved surfaces that concave towards the first center line L1.

[0066] (3) In the above embodiment, the length adjustment mechanism 313 is provided to allow adjustment of the hair cutting length of the first blade portion 31, but the length adjustment mechanism 313 is not required. Also, the length adjustment mechanism 313 is configured to include a locking portion 223 and a locking portion 313c, but other configurations are also possible, such as providing a comb operating part with a screw as shown in Japanese Patent No. 4504676 to allow length adjustment.

[0067] (4) In the above embodiment, the arms, legs, and VIO zone were given as examples of areas where the hair cutter 1 is used to cut hair, but it can be used to cut hair on any part of the body. For example, in addition to the areas mentioned in the above embodiment, hair can be cut to a length that suits the user's preference, such as keeping eyebrows relatively long and underarm hair relatively short. [Explanation of Symbols]

[0068] 1…Hair cutter, 2…Handle part, 3…Head part, 21…Gripping part, 21a…Groove, 22…Tip part, 23…Rear end part, 31…First blade part, 32…Second blade part, 34…Cover part, 211~216…First surface~Sixth surface, 221, 222…Opening, 223…Locking part, 224…Slide guide, 224a…Rail, 311…First blade body, 311a…First cutting edge, 312…First comb structure, 312a…First comb teeth, 313…Length adjustment mechanism, 3 13a...First clamping part, 313b...Second clamping part, 313c...Locking part, 313d...First recess, 313e...Protrusion, 313f...Second recess, 313h...Adjustment projection, 321...Second blade body, 321a...Second cutting edge, 321b...Elongated hole, 322...Second comb structure, 322a...Second comb teeth, 341...First cover, 341a...Through hole, 342...Second cover, 342a, 342b...Protrusion, 342c...Engaging projection, 351~356...First to sixth surfaces

Claims

1. A hair cutter used to adjust the length of hair, It is composed of a rod-shaped member with one direction as its longitudinal direction, and has a handle portion (2) having a tip portion (22) and a rear end portion (23) opposite to the tip portion, The handle portion has a head portion (3) positioned on the tip side, The head portion is, The first blade (31) includes a planar first blade body (311) with a first cutting edge (311a) facing in one direction perpendicular to the longitudinal direction, and a first comb structure (312) having a plurality of first comb teeth (312a) arranged at a first interval (S1) covering the first blade body, and a first blade portion (31) that cuts hair passing through the first comb teeth with the first blade body, The device includes a planar second blade body (321) with a second cutting edge (321a) directed toward the other side in the width direction, and a second comb structure (322) having a plurality of second comb teeth (322a) covering the second blade body, arranged at a second interval (S2) narrower than the first interval, and a second blade portion (32) that is shorter than the first blade portion and cuts hair that has passed through the second comb teeth with the second blade body in a range narrower than the range of hair cutting by the first blade body, In the first comb structure, the portions of the plurality of first comb teeth covering the first blade are designated as peaks, and the portions between the plurality of first comb teeth that expose the first blade are designated as valleys, and in the second comb structure, the portions of the plurality of second comb teeth covering the second blade are designated as peaks, and the portions between the plurality of second comb teeth that expose the second blade are designated as valleys. On one side and the other side of the first blade, virtual planes passing through the ridges of the peaks formed by each of the plurality of first comb teeth and inclined with respect to the first blade are defined as the first head surface (351) and the second head surface (352), respectively. On one side and the other side of the second blade, virtual planes passing through the ridges of the peaks formed by each of the plurality of second comb teeth and inclined with respect to the second blade are defined as the third head surface (353) and the fourth head surface (354), respectively. The handle portion has a first handle surface (211) corresponding to the first head surface, a second handle surface (212) corresponding to the second head surface, a third handle surface (213) corresponding to the third head surface, and a fourth handle surface (214) corresponding to the fourth head surface. A hair clipper in which the first surface of the handle and the first surface of the head face in the same direction, the fourth surface of the handle and the fourth surface of the head face in opposite directions, the second surface of the handle and the second surface of the head face in the same direction, and the third surface of the handle and the third surface of the head face in opposite directions.

2. The hair cutter according to claim 1, wherein the first blade portion has a length adjustment mechanism (313) that moves the first cutting edge relative to the tips of the plurality of first comb teeth in a direction perpendicular to the longitudinal direction to adjust the length of hair to be cut.

3. The hair cutter according to claim 1, wherein the first surface of the head and the first surface of the handle are parallel or the angle between them is less than 5 degrees, the second surface of the head and the second surface of the handle are parallel or the angle between them is less than 5 degrees, the third surface of the head and the third surface of the handle are parallel or the angle between them is less than 5 degrees, and the fourth surface of the head and the fourth surface of the handle are parallel or the angle between them is less than 5 degrees.

4. The head portion has a fifth head surface (355) on one surface between the first head surface and the third head surface, and a sixth head surface (356) on one surface between the second head surface and the fourth head surface, and the cross-sectional shape with the longitudinal direction as the normal direction is a hexagon formed by the first head surface to the sixth head surface. The hair cutter according to any one of claims 1 to 3, wherein the handle portion has one surface between the first surface of the handle and the second surface of the handle designated as the fifth surface of the handle (215), and one surface between the third surface of the handle and the fourth surface of the handle designated as the sixth surface of the handle (216), and the cross-sectional shape with the longitudinal direction as the normal direction is a hexagonal shape formed by the first surface of the handle to the sixth surface of the handle.

5. The handle portion has a first center line (L1) along the longitudinal direction, and forms a hexagonal shape from the first surface of the handle to the sixth surface of the handle with respect to the first center line. The head portion has a second center line (L2) along the longitudinal direction, and the head portion is hexagonal in shape from the first surface to the sixth surface of the head, with the second center line as the center. The hair cutter according to claim 4, wherein the hexagonal shape formed by the handle portion and the hexagonal shape formed by the head portion are arranged such that the diagonal (D2) passing between the first surface and the second surface of the head and between the second center line and the third surface and the fourth surface of the head intersects at a 90-degree angle when viewed from the longitudinal direction with respect to the diagonal (D1) passing between the first surface and the third surface of the handle and between the first center line and between the second surface and the fourth surface of the handle.

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