Razor

Abstract

To provide a razor that enables shaving by moving a blade with a linear blade edge, without using a special circular blade, in any desired direction while a skin contacting surface is held in contact with the skin.SOLUTION: The present invention comprises a plurality of blade bodies 10 each having a linear blade edge 11, a skin contact surface 25 in which an opening part 21 for exposing the blade edges 11 is formed, and a barrel part 30 that is integrated with the skin contact surface 25 and constitutes a hollow part 33 linked to the opening part 21. The opening part 21 is formed in a regular polygonal shape, and the respective blade edges 11 of the plurality of blade bodies 10 are arranged along the respective sides of the regular polygonal shape constituting the opening part 21, so that the respective blade edges 11 of the plurality of blade bodies 10 are arranged in a regular polygonal shape facing each other.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a razor that can perform a "stroking shave" by stroking the skin to shave hair. [Background technology]

[0002] Conventionally, Patent Document 1 proposes a circular razor equipped with a circular blade in a circular opening in a circular housing. The circular razor has a structure in which the inner circumference of the circular blade is the cutting edge, and a circular guard that is smaller than the circular blade is disposed inside the cutting edge. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] U.S. Patent Publication No. 2022 / 0168912 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the circular razor described in Patent Document 1 requires a circular blade with a special shape, which increases the cost of manufacturing and developing the circular blade.

[0005] Furthermore, with a circular blade, there is always a portion where the cutting edge is parallel to the direction of movement of the circular razor when shaving, and if the guard is simply positioned inside the circular blade at a distance from the cutting edge of the circular blade, there is a risk of injuring the skin at that parallel portion. In particular, if the distance from the skin-contacting surface of the circular razor to the cutting edge is shortened so that hair can be shaved close to the root, there is a risk of the circular blade injuring the skin. Furthermore, if the distance from the skin-contacting surface to the cutting edge is lengthened to avoid injuring the skin, it will not be possible to shave hair closely, and if the skin-contacting surface is pressed too hard against the skin in an attempt to shave closely, there is a risk of injuring the skin.

[0006] As the age at which children start shaving unwanted hair increases, market research has shown that most children from the fourth grade of elementary school to junior high school are concerned about unwanted hair and that many have experience removing it. However, not only children but also parents are concerned about the risk of injury when young children use razors. For this reason, it is desirable to develop a more affordable razor that is safe enough for young users to use without getting hurt, allows for intuitive, easy shaving as if gently stroking the skin, and allows anyone, even those with visual impairments or weak grip strength, to shave with confidence.

[0007] The first objective of this disclosure is to provide a razor that can perform smooth shaving using a blade with a straight cutting edge without using a special circular blade, and the second objective is to provide a razor that can prevent damage to the skin. [Means for solving the problem]

[0008] A razor in a first aspect of the present disclosure comprises a plurality of blade bodies (10) having straight cutting edges (11) for shaving hair, a skin contact surface (25) having openings (21) exposing the cutting edges of the blade bodies and contacting the skin, and a body portion (30) that is integral with the skin contact surface and forms a hollow portion (33) connected to the openings, and the openings are arranged in the shape of a regular polygon, and the cutting edges of the plurality of blade bodies are arranged along each side of the regular polygon formed by the openings, so that the cutting edges of the plurality of blade bodies are arranged facing each other in the shape of a regular polygon.

[0009] In this way, by arranging multiple blades with straight cutting edges in a regular polygonal shape, rather than special circular blades, a razor can be made that can shave a wide area by "stroking" the razor while moving the razor along the skin while bringing the skin-contacting surface into direct contact with the skin. Furthermore, because multiple blades are arranged in a regular polygonal shape, shaving can be easily performed by simply moving the razor while bringing the skin-contacting surface into contact with the skin, regardless of the orientation of the blades during shaving.

[0010] In a second aspect of the present disclosure, a comb structure (315) is provided which has a plurality of comb teeth (315a) which cover the cutting edges of a plurality of blades and protrude further inward into the opening than the covering cutting edges, so that hair passes through the comb teeth and then comes into contact with the cutting edges to be cut.

[0011] In this way, because the cutting edges of the multiple blades are each covered with comb teeth, shaving can be done safely without damaging the skin. Also, because the razor has a structure in which multiple blades are arranged in a regular polygonal shape, allowing shaving in any direction, not only some blades have cutting edges that are nearly perpendicular to the direction of hair movement during shaving, but also some blades have cutting edges that face the longitudinal direction of the hair movement. However, even for blades whose cutting edges face the longitudinal direction of the hair movement, covering them with comb teeth makes it possible to shave safely.

[0012] In a third aspect of the present disclosure, the spacing (I1) between the teeth is 1.0 mm or less, and the shortest distance (L1) from the skin contact surface to the cutting edge of the blade is 0.15 mm or more. For example, the spacing between the teeth is preferably 0.4 mm or more and 1.0 mm or less. The shortest distance is preferably 0.15 mm or more and 0.25 mm or less.

[0013] In this way, by setting the spacing between the comb teeth to 1.0 mm or less, skin is prevented from getting caught between the comb teeth, preventing damage to the skin caused by the blades. Setting the spacing between the comb teeth to 0.4 mm or more ensures sufficient space for hair to fit between the comb teeth. Furthermore, by ensuring a minimum distance of 0.15 mm or more from the skin-contacting surface to the blade tip, the blade tip can be positioned slightly away from the skin, preventing the blade tip from directly contacting the skin and further reducing the risk of skin injury. Furthermore, setting the minimum distance to 0.25 mm or less allows hair to be cut as close to the root as possible.

[0014] In a fourth aspect of the present disclosure, there are five or more blades, the five or more blades are arranged in a regular polygonal shape having five or more sides, and the opening is in the shape of a regular polygonal shape having five or more sides.

[0015] In this way, the blades are arranged in a regular pentagon or a regular polygon with more sides, so hair can be shaved well regardless of the direction the hair is moving in. Furthermore, if there are five blades, the blade arrangement and the shape of the opening will be a regular pentagon, which prevents the razor from becoming too large due to the increased number of blades.

[0016] In a fifth aspect of the present disclosure, when shaving hair with one of the multiple blade bodies by moving the blade body in any direction while bringing the skin contact surface into contact with the skin, the angle formed between the cutting edge of at least one of the multiple blade bodies and the direction of movement is 45 degrees or more.

[0017] In this way, by having any of the cutting edges of the multiple blades at an angle of 45 degrees or more relative to the direction of hair movement, it becomes possible to shave hair well. For example, if the blades are arranged in a regular pentagonal shape or a regular polygonal shape with more sides, any one of the cutting edges of the multiple blades will always be at an angle of 45 degrees or more relative to the direction of hair movement, regardless of the direction of hair movement.

[0018] In a sixth aspect of the present disclosure, the body portion has an arched cross section and forms a dome shape that is rotationally symmetric about an apex of the arch.

[0019] By making the body dome-shaped, the razor can be used by gripping it as if enveloping the entire body, making it easy to hold and use. Furthermore, when moving the razor in various directions to shave, the dome-shaped body, i.e., the circular shape when viewed from above, does not specify the direction of movement of the razor, and hair can be shaved by moving it in any direction. This also increases the degree of freedom in shaving operability. In particular, as the age at which people remove unwanted hair is becoming younger, and razors are sometimes used by minors, making the body dome-shaped makes it easy to use for younger people.

[0020] In a seventh aspect of the present disclosure, the body portion is provided on the side opposite the skin contact surface with a grip portion (40) that protrudes from the body portion to the opposite side and has an enlarged dimension in the planar direction of the skin contact surface at the tip side of the protruding portion.

[0021] The handle can be used to hold the razor. By configuring the handle so that it projects from the body and has an enlarged skin-contacting surface at the tip, the handle can be held in a comfortable manner.

[0022] In an eighth aspect of the present disclosure, the body is provided with a communication hole (321) that connects the hollow portion with the outside of the body. By forming such a communication hole in the body, if water or shaved hair gets into the hollow portion of the body, it is possible to discharge them, thereby keeping the razor clean.

[0023] In a ninth aspect of the present disclosure, the body portion has an arched cross-sectional shape and is dome-shaped with the apex of the arch as its center, and multiple communicating holes are formed in a row in the circumferential direction around the apex.

[0024] Furthermore, if the body is dome-shaped with an arched cross section, forming multiple communication holes in a row in the circumferential direction around the apex of the arch allows water and dirt to be discharged from any position. Furthermore, the communication holes act as a grip, improving the stability of holding the razor when shaving. In addition, the presence of the communication holes adds an accent and enhances the design of the razor.

[0025] In a tenth aspect of the present disclosure, the device has a bottom (20) that forms a skin contact surface, and the body and bottom are connected to each other, thereby sandwiching the blade body between them. The body has a comb structure and a pressing portion (314a) that presses the blade body on the inside of the blade tip, and a clearance is provided between the comb teeth of the comb structure and the blade body on the blade tip side of the pressing portion. The bottom has a seat (22) that contacts the blade body and sandwiches the blade body together with the pressing portion, and a flow path-forming groove (24) that surrounds the seat at a location corresponding to the periphery of the blade body, reaches the opening, and is recessed from the seat.

[0026] In this way, the flow path grooves are provided to form a flow path for washing with water. Therefore, it is possible to wash away hair with the water flow through the flow path configuration section. Furthermore, there is clearance between the comb teeth and the blade body, so even if shaved hair remains between the comb teeth and the blade body, it is not tightly pinched between the comb teeth and the blade body, so it can be easily washed away with water.

[0027] A razor in an eleventh aspect of the present disclosure comprises a plurality of blade bodies (10) having straight cutting edges (11) for shaving hair, a skin contact surface (25) having openings (21) exposing the cutting edges of the blade bodies and contacting the skin, a body portion (30) that is integral with the skin contact surface and forms a hollow portion (33) connected to the opening, and a comb structure (315) that covers each of the cutting edges of the plurality of blade bodies and has a plurality of comb teeth (315a) that protrude further inward into the opening than the covering cutting edges so that hair passes through the comb teeth before coming into contact with the cutting edges and being cut, and the openings are arranged in a polygonal shape, and the cutting edges of the plurality of blade bodies are arranged along each side of the polygonal shape formed by the opening, so that the cutting edges of the plurality of blade bodies are arranged facing each other in a polygonal shape.

[0028] In this way, by using multiple blades with linear cutting edges arranged in a polygonal shape rather than special circular blades, a razor can be made that can shave a wide area by smoothing. Furthermore, because the multiple blades are arranged in a polygonal shape, shaving can be easily performed by smoothing, regardless of the orientation of the blades during shaving. Furthermore, because each cutting edge of the multiple blades is covered with comb teeth, shaving can be performed safely without damaging the skin. Furthermore, because the razor is structured so that shaving can be performed regardless of the orientation by arranging multiple blades in a polygonal shape, not only blades whose cutting edges are nearly perpendicular to the direction of hair movement during shaving, but also blades whose cutting edges are oriented along the direction of hair movement are available. However, even blades whose cutting edges are oriented along the direction of hair movement can be safely shaved by covering them with comb teeth.

[0029] The reference symbols in parentheses attached to each component indicate an example of the correspondence between the component and the specific components described in the embodiments described below. [Brief explanation of the drawings]

[0030] [Figure 1] 1 is a perspective view from above of a razor according to a first embodiment of the present disclosure. [Figure 2] FIG. 2 is a perspective view of the razor shown in FIG. 1 from below. [Figure 3] FIG. 2 is a bottom view of the razor shown in FIG. [Figure 4] FIG. 2 is an exploded view of the razor shown in FIG. [Figure 5] 7 is an enlarged partial cross-sectional view of the vicinity of the blade body corresponding to line VV in FIG. 6. [Figure 6] FIG. 6 is an enlarged partial cross-sectional view of the blade body and its vicinity corresponding to the line VI-VI in FIG. [Figure 7] FIG. 2 is an enlarged view of the cutting edge of the blade body and the comb-tooth structure. [Figure 8] FIG. 2 is an enlarged perspective view of the cutting edge of the blade body and the comb-tooth structure from below. [Figure 9] 10 is a cross-sectional view taken along the line XI-XI in FIG. 7. [Figure 10] FIG. 10 is a perspective view of a razor according to a second embodiment of the present disclosure. [Figure 11] 11 is a diagram showing an example of how the razor shown in FIG. 10 is used. FIG. [Figure 12] 11 is a diagram showing another example of how to use the razor shown in FIG. 10. FIG. [Figure 13] 11 is a diagram showing another example of how to use the razor shown in FIG. 10. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0031] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. In the following, including other embodiments described below, identical or equivalent parts will be denoted by the same reference numerals.

[0032] (First embodiment) A razor 1 according to a first embodiment of the present disclosure will be described below with reference to FIGS.

[0033] [Configuration of Razor 1] The razor 1 shown in Figures 1 to 3 is capable of shaving hair by smoothing, has a structure in which a body part 30 is connected to a bottom part 20 equipped with blade bodies 10, and is used, for example, for shaving body hair. As shown in Figure 2, an opening 21 is formed in the bottom part 20, and the opening 21 is a regular polygon. With a plurality of blade bodies 10 arranged on each side of the opening 21, the blade bodies 10 are also arranged in a regular polygonal shape. In this embodiment, five blade bodies 10 are provided, and the blade bodies 10 and openings 21 are arranged in a regular pentagonal shape. Hereinafter, the center line of the regular polygon formed by the openings 21 and blade bodies 10 is referred to as the central axis C, and the direction around the central axis is referred to as the circumferential direction.

[0034] Each blade body 10 has the same shape, and as shown in Figures 4 and 5, is a substantially rectangular plate with one of its long sides defined as a cutting edge 11. As shown in Figures 2 and 3, the cutting edges 11 of the five blade bodies 10 are exposed from openings 21, and are arranged facing each other in a regular polygonal shape. An oval slot 12 with its major axis tangent to the circumferential direction is formed inside each blade body 10, and as shown in Figure 5, the bottom portion 20 and the body portion 30 are attached by inserting an engaging protrusion 23 formed on the bottom portion 20 (described later) into the slot 12. The minor axis dimension of the slot 12 is aligned with the dimension of the engaging protrusion 23, so that each blade body 10 is held between the bottom portion 20 and the body portion 30 without any rattle.

[0035] A protrusion 13 partially projects from one end of the side of the blade body 10 opposite the cutting edge 11. As a result, as shown in Figure 5, when placing the blade body 10 in the seat 22 of the bottom 20 (described later), the front and back of the blade body 10 can be attached correctly, and the protrusion 13 partially projects from the seat 22, making it easy to remove the blade body 10.

[0036] The bottom 20 is a member that exposes the blade body 10 and constitutes the portion that comes into contact with the skin during shaving, and is formed, for example, as a one-piece resin molded product in the shape of a circular dish with an opening in the center. The bottom 20 has a circular shape when the razor 1 is viewed from below as shown in Figure 3, and has an opening 21, a seat 22, an engaging protrusion 23, a flow path forming groove 24, a skin contact surface 25, and a first locking portion 26 as shown in Figures 2 to 5.

[0037] The opening 21 is formed at the center of the bottom 20 and has a regular polygonal shape, a regular pentagon as described above. The term "regular polygonal shape" does not mean a strictly regular polygon, but rather an approximately regular polygon. Specifically, the opening 21 has straight portions 21a constituting five sides and discharge holes 21b located between the straight portions 21a, i.e., at the corners of the regular polygon. The straight portions 21a are portions that follow the cutting edge 11 of each blade 10, and are spaced apart from the engaging projection 23 so that the cutting edge 11 protrudes toward the central axis C beyond the straight portions 21a when the blade 10 is positioned on the bottom 20, as shown in FIGS. 3 and 5 . Furthermore, each straight portion 21a is set to be equal to or greater than the longitudinal dimension of the blade 10. The discharge holes 21b are approximately circular openings at the corners of the regular polygonal shape and are connected to the flow path grooves 24, facilitating the discharge of water and dirt when cleaning the razor 1.

[0038] The seat 22 is where the blade 10 is disposed, and is provided at a plurality of locations (here, five locations) along the circumferential direction centered on the central axis C, at equal intervals, and extends radially from the straight portion 21a relative to the central axis C. Specifically, the blade 10 is disposed so as to abut against the surface 22a of the seat 22, and as shown in Figure 6, the surface 22a is inclined at an angle of, for example, 10 to 30 degrees so that the surface 22a approaches the skin contact surface 25 as it approaches the straight portion 21a. Therefore, the blade 10 disposed in the seat 22 abuts against the skin at that inclination, allowing for easier shaving.

[0039] The engagement protrusions 23 are provided at the center of each seat 22 so as to protrude from the seat 22. They position the blade body 10 and, in this embodiment, also serve to integrate the bottom 20 and the body 30. The engagement protrusions 23 are arranged in three positions along the longitudinal direction of the blade body 10, with the two protrusions 23a on both sides positioned to correspond to the ends of the slot 12 of the blade body 10 and the one protrusion 23b located between them positioned at the center of the slot 12. As shown in FIG. 5 , the protrusions 23a have a T-shaped cross section and an arc-shaped tip that fits along the slot 12, ensuring that the blade body 10 is positioned properly in the seat 22. The protrusion 23b is higher than the protrusion 23a and has a cross-shaped cross section with a rounded tip. It fits into the body 30 before the protrusion 23a, facilitating positioning of the bottom 20 and the body 30 when they are connected.

[0040] As shown in Figure 5, flow path forming groove 24 is formed in a location corresponding to the periphery of blade body 10, surrounding seat portion 22 and reaching opening 21, and is configured as a groove recessed below seat portion 22. When razor 1 is washed with water, water and dirt such as shaved hair are discharged through a path that bypasses support wall 314, particularly flow path forming groove 24.

[0041] The skin contact surface 25 is the surface of the bottom 20 opposite the body 30, and is the surface that comes into contact with the user's skin during shaving. The skin contact surface 25 may be either curved or flat, but a curved surface that protrudes slightly away from the body 30 as it approaches the central axis C is preferable because it presses against the skin when brought into contact with the skin, allowing the cutting edge 11 of the blade body 10 to hit the root of the hair. The opening 21 is located in the center of this skin contact surface 25.

[0042] The first locking portion 26 is a connecting member that connects the bottom portion 20 and the body portion 30, and engages with a second locking portion 313 (described later) provided on the body portion 30. In this embodiment, the first locking portion 26 is provided on the side of the bottom portion 20 opposite the skin-contact surface 25, i.e., on the body portion 30 side, and stands upright toward the body portion 30 at a position inside the outer edge of the bottom portion 20. The number of first locking portions 26 is arbitrary, but here there are five, the same number as the number of blades 10. Each first locking portion 26 is disposed radially outward from each blade 10, centered on the central axis C. The first locking portions 26 may have any shape as long as they engage with the second locking portion 313 on the body portion 30, but here they are rectangular with a through-hole 26a formed on the inside.

[0043] An annular flat surface 27 is formed on the bottom portion 20 on the outer circumferential side of the first locking portion 26, with the center being the center axis C, and an R-shaped curved surface 28 is formed between the flat surface 27 and the skin contact surface 25. As shown in Fig. 2, when the bottom portion 20 and the body portion 30 are connected, the flat surface 27 is in close contact with the body portion 30 and is hidden inside the razor 1, and the outer wall surface of the body portion 30 and the curved surface 28 are connected as a seamless surface to form the outer wall of the razor 1.

[0044] The body 30 is connected to the bottom 20 on the side opposite the skin contact surface 25, thereby being integrated with the blade 10 and the bottom 20. In this embodiment, as shown in Figure 4, the body 30 is made up of two parts, a housing 31 and a lid 32, but it may also be made up of a single part.

[0045] The housing 31 is a member disposed between the bottom 20 and the lid 32, and is formed, for example, as a single resin molded product, and has a generally cylindrical shape. The housing 31 serves to connect the body 30 to the bottom 20, to hold the blade 10 together with the bottom 20, and to cover the cutting edge 11 of the blade 10 to protect the skin from injury. Specifically, the housing 31 has an outer edge 311, a body 312, a second locking portion 313, a support wall 314, a comb structure 315, a connecting protrusion 316, etc.

[0046] The outer edge portion 311 is generally tubular and forms part of the outer shape of the razor 1. The inner periphery of the outer edge portion 311 is provided with a plurality of connecting portions 311a that protrude radially inward from the central axis C, and the body portion 312 is connected to the inner periphery of the outer edge portion 311 via these connecting portions 311a. The portions between the outer edge portion 311 and the body portion 312 that are not connected by the connecting portions 311a form windows 311b that penetrate in the direction of the central axis C. The connecting portions 311a are formed at positions corresponding to the spaces between the plurality of blade bodies 10, and the positions corresponding to each of the plurality of blade bodies 10, i.e., the positions corresponding to each first locking portion 26, form the windows 311b.

[0047] The body portion 312 is a generally cylindrical portion disposed inside the outer edge portion 311 and integrates the portions constituting the second locking portion 313, the support wall 314, and the comb structure 315 with the outer edge portion 311. The second locking portion 313 is disposed on the outer edge side of the body portion 312 at a position corresponding to the window portion 311b, and the support wall 314 and the comb structure 315 are disposed on the bottom 20 side of the body portion 312. The body portion 312 protrudes beyond the outer edge portion 311 in both directions along the central axis C, with the support wall 314 and the comb structure 315 provided on the portion protruding toward the bottom 20 and the connecting protrusion 316 provided on the portion protruding toward the lid portion 32. The second locking portion 313 is disposed so as to extend from the portion of the body portion 312 protruding toward the lid portion 32, through the window portion 311b, to the portion protruding toward the bottom 20. The inner circumferential side of the body portion 312 is hollow, and constitutes a part of the hollow portion 33 formed in the trunk portion 30 .

[0048] The second locking portion 313 is a connecting member that, together with the first locking portion 26, connects the bottom portion 20 and the trunk portion 30. In this embodiment, the second locking portion 313 is shaped to extend from the outer peripheral wall of the body portion 312 toward the bottom portion 20 within the window portion 311b. More specifically, the second locking portion 313 has a base end 313a near the end face of the body portion 312 opposite the bottom portion 20, extends from the base end 313a toward the radially outer side of the body portion 312 for a predetermined distance, and then bends back at a right angle from there and extends toward the bottom portion 20, thereby forming the locking piece 313b. Furthermore, as shown in FIG. 6, a gap is formed between the locking piece 313b and the outer wall surface of the body portion 312, allowing the locking piece 313b to be elastically deformable. At the tip position of the locking piece 313b opposite the base end 313a, a protrusion 313c is provided that protrudes opposite the body portion 312, i.e., radially outward from the center axis C, and this protrusion 313c fits into the through hole 26a of the first locking portion 26, thereby locking the first locking portion 26 and the second locking portion 313 together.

[0049] 4, the support wall 314 is configured by protruding a portion of the body 312 corresponding to the location of the blade 10 toward the bottom 20, and the pressing portion 314a is configured by the tip surface of the support wall 314 facing the bottom 20. The pressing portion 314a is inclined at the same angle as the seat portion 22 formed on the bottom 20 with respect to a plane normal to the central axis C, so that the pressing portion 314a approaches the skin contact surface 25 as it approaches the central axis C. The first locking portion 26 and the second locking portion 313 are locked together, so that the blade 10 is sandwiched between the seat portion 22 on the bottom 20 and the pressing portion 314a.

[0050] As shown in FIGS. 4 to 6, the support wall 314 has a linear portion 314b and a cylindrical portion 314c. The linear portion 314b is shaped to fit the cutting edge 11 of the blade body 10. The cylindrical portion 314c protrudes from the linear portion 314b toward the locking piece 313b at three locations: both ends and the center of the linear portion 314b. The tips of the linear portion 314b and the cylindrical portion 314c form the pressing portion 314a. The support wall 314 is also formed with engagement holes 314d and 314e into which the engagement protrusions 23 formed on the bottom portion 20 fit. The engagement holes 314d and 314e are formed inside the portions of the pressing portion 314a that are formed by the three cylindrical portions 314c. Each of the engagement holes 314d, 314e is a circular hole of corresponding size and at a position corresponding to the three engagement protrusions 23. Each engagement protrusion 23 fits into these engagement holes 314d, 314e, and the outer walls of the engagement protrusions 23 and the inner walls of the engagement holes 314d, 314e come into close contact with each other, thereby suppressing rattling between the housing part 31 and the bottom part 20.

[0051] 6, the support wall 314 is sized to fit inside the blade body 10, and the area outside the support wall 314 in the planar direction of the blade body 10 is hollow. Therefore, when cleaning the razor 1, this hollow, together with the flow path-forming groove 24, serves as a flow path, making it easy to drain water and dirt.

[0052] As shown in FIGS. 4 to 6, the comb structure 315 is composed of multiple comb teeth 315a protruding inward from the linear portion 314b of the support wall 314, i.e., opposite the cylindrical portion 314c. As shown in FIG. 7, the comb teeth 315a are arranged at equal intervals along the cutting edge 11 of the blade body 10. The spacing I1 between the comb teeth 315a and the width W1 in the arrangement direction are arbitrary, but the spacing I1 is set to 0.4 mm or more and 1.0 mm or less, the pitch between the comb teeth 315a is set to 0.8 mm or more and 2.5 mm or less, and the width W1 is set to 0.4 mm or more and 2.0 mm or less. Furthermore, as shown in FIG. 8, the tip of each comb tooth 315a protrudes beyond the linear portion 21a of the base 20 and curves toward the skin contact surface 25. This protruding portion toward the skin contact surface 25 constitutes a cover portion 315b, covering the cutting edge 11. 9, the cover portion 315b protrudes toward the skin contact surface 25 to such an extent that it overlaps with an extension of the cutting edge 11 in the planar direction of the blade body 10. The shortest distance L1 from the skin contact surface 25 to the cutting edge 11 is 0.15 mm or more and 0.25 mm or less. The amount of protrusion P1 of the comb teeth 315a from the cutting edge 11 radially inward relative to the central axis C can also be set arbitrarily, but in this example, the amount of protrusion P1 is set to 0.5 mm or more and 1.2 mm or less.

[0053] 7 to 9, the outer shape of each comb tooth 315a is generally rounded, and the tip of cover portion 315b is also rounded. This allows comb teeth 315a to slide easily over the skin surface and is shaped to prevent them from catching on the skin and causing damage during shaving.

[0054] 6, the comb teeth 315a are spaced apart from the blade body 10. Specifically, when viewed from the direction along the central axis C, the comb teeth 315a are spaced apart from the blade body 10 over the entire area of ​​the portions of the comb teeth 315a that overlap with the flat surface portions of the blade body 10. In other words, the pressing portions 314a protrude more than the comb teeth 315a, and a clearance is provided between the comb teeth 315a and the blade body 10 on the cutting edge 11 side of the pressing portions 314a. This makes it difficult for hair to get caught between the comb teeth 315a and the blade body 10 when shaving.

[0055] The connecting protrusions 316 are provided in plurality on the outer edge side of a portion of the body portion 312 that protrudes from the outer edge portion 311 toward the lid portion 32, and protrude radially outward relative to the central axis C. The lid portion 32 can be connected to the housing portion 31 via the connecting protrusions 316.

[0056] The lid 32 is connected to the housing 31 on the side opposite the bottom 20, thereby constituting the body 30 together with the housing 31. The lid 32 has an arch-shaped cross section cut radially about the central axis C, forming a dome shape with rotational symmetry about the apex of the arch. The inside of the lid 32 is hollow, and is connected to the cavity of the housing 31 to form a hollow portion 33. The lid 32 is provided with communication holes 321 connecting the hollow portion 33 to the outside of the body 30, allowing water to be injected or discharged when cleaning the razor 1. The communication holes 321 are arranged in a circumferential direction around the central axis C, in other words, the apex of the arch, and are arranged at equal intervals in this example. The shape of the communication holes 321 is arbitrary, but may be, for example, a rectangular or elliptical shape with the radial direction from the apex of the arch as the longitudinal direction.

[0057] Also, although not shown, a connecting groove or connecting protrusion corresponding to the connecting protrusion 316 formed on the housing part 31 is formed on the inside of the lid part 32, making it possible for the lid part 32 to be connected to the housing part 31.

[0058] The end of the lid portion 32 on the housing portion 31 side is formed as a ring-shaped flat surface 322 whose outer diameter is aligned with the outer edge portion 311 of the housing portion 31, centered on the central axis C. Therefore, when the lid portion 32 is connected to the housing portion 31 as shown in Fig. 1, the flat surface 322 comes into close contact with the outer edge portion 311 and is hidden inside the razor 1, and the outer wall surface of the housing portion 31 and the outer wall surface of the lid portion 32 are connected as a seamless surface to form the outer wall of the razor 1.

[0059] [How to use Razor 1] Next, we will explain how to use the razor 1. The razor 1 is used, for example, for shaving body hair. The razor 1 is placed with the skin contact surface 25 against the area to be shaved, and then moved in any direction while lightly pressing the razor 1; in other words, shaving is performed by "stroking" the skin. The razor 1 has a polygonal opening 21, and the cutting edges 11 of the multiple blades 10 are arranged in a polygonal shape, so that the cutting edge 11 of any of the multiple blades 10 comes into contact with the hair and cuts it.

[0060] As shown in FIG. 3, if the direction of hair movement, which is the opposite direction to the movement of the razor 1, is designated as A1, then it is preferable that the direction of movement A1 is perpendicular to the cutting edge 11 that cuts the hair, but it may be inclined relative to the perpendicular direction. As long as the angle between the cutting edge 11 and the direction of movement A1 is 45 degrees or greater, hair can be cut accurately even if the cutting edge 11 is inclined relative to the perpendicular direction to the direction of movement A1. For this reason, in this embodiment, five or more blade bodies 10 are used, and the blade bodies 10 are arranged in a regular pentagonal shape or a regular polygonal shape with more angles. In this way, regardless of the direction of movement A1, one of the cutting edges 11 of the multiple blade bodies 10 will always be at an angle of 45 degrees or greater relative to the direction of movement A1, ensuring good shaving.

[0061] However, as the number of blade bodies 10 increases, the size of the regular polygon formed by the multiple blade bodies 10 increases. In this case, the size of the skin contact surface 25 on which the blade bodies 10 are provided and the body portion 30 integrated with the skin contact surface 25 increases, which may make it difficult to hold in the hand. For this reason, it is preferable to use five blade bodies 10 so that the arrangement of the blade bodies 10 and the shape of the opening 21 form a regular pentagon. In this way, the size of the razor 1 does not become too large, and the direction A1 of hair movement during shaving can be made nearly perpendicular to the cutting edge 11, allowing for better shaving.

[0062] By reducing the blade length (length of the cutting edge 11), it is possible to prevent the size of the regular polygon formed by the multiple blade bodies 10 from increasing even when the number of blade bodies 10 is increased. However, this reduces the area that can cut hair in one stroke of the razor 1, in other words, the number of hairs that can be cut. For this reason, it is preferable to configure the blade length of the blade body 10 to a certain size, for example, 10 mm or more and 25 mm or less. By making the blade length 10 mm or more, it is possible to prevent the amount of hair that can be cut in one stroke of the razor 1 from becoming too small. Furthermore, by making the blade length 25 mm or less, it is possible to prevent the razor 1 from becoming too large due to an increase in the area of ​​the opening 21, and to avoid the razor 1 becoming too large, which would impair ease of holding or make it difficult to store.

[0063] [Effect of Razor 1] The effects obtained when shaving hair using the razor 1 according to this embodiment will be described below.

[0064] (1) The razor 1 of this embodiment includes a plurality of blade bodies 10 each having a linear cutting edge 11, a skin contact surface 25 in which openings 21 are formed, and a body portion 30 that defines a hollow portion 33 connected to the openings 21 and is integrated with the skin contact surface 25. The openings 21 are arranged in a regular polygonal shape, and the cutting edges 11 of the plurality of blade bodies 10 are arranged along each side of the regular polygonal shape defined by the openings 21, so that the cutting edges 11 are arranged facing each other in a regular polygonal shape.

[0065] In this way, by arranging multiple blade bodies 10 with straight cutting edges 11 in a regular polygonal shape, rather than using special circular blades, the razor 1 can be made to be capable of shaving a wide area with a smooth shave. Furthermore, because multiple blade bodies 10 are arranged in a regular polygonal shape, shaving can be easily performed by simply moving the razor 1 while bringing the skin contact surface 25 into contact with the skin, regardless of the orientation of the blade bodies 10 during shaving. Furthermore, because of the simple shape of the straight cutting edges 11, ready-made products can also be used as the blade bodies 10.

[0066] Furthermore, since the blades 10 are arranged in a regular pentagonal shape or a regular polygonal shape with more corners than that, no matter which direction the direction of travel A1 faces, one of the cutting edges 11 of the multiple blades 10 is always at an angle of 45 degrees or more to the direction of travel A1, making it possible to shave hair well.

[0067] Furthermore, in this embodiment, the number of blades 10 is five, and the arrangement of the blades 10 and the shape of the openings 21 are regular pentagonal, which prevents the size of the razor 1 from becoming too large.

[0068] (2) The razor 1 is provided with a comb structure 315 that covers each of the cutting edges 11 of the multiple blade bodies 10 and has multiple comb teeth 315a that protrude toward the inside of the opening 21 beyond the cutting edges 11 they cover, so that hair passes through the comb teeth 315a and then comes into contact with the cutting edges 11 to be cut.

[0069] In this way, because each cutting edge 11 of the multiple blade bodies 10 is covered with the comb teeth 315a, shaving can be performed safely without injuring the skin. Furthermore, because the razor 1 has a structure in which the multiple blade bodies 10 are arranged in a regular polygonal shape and can shave in any direction, not only are there blade bodies 10 whose cutting edges 11 are nearly perpendicular to the hair movement direction A1 during shaving, but there are also blade bodies 10 whose cutting edges 11 face longitudinally along the hair movement direction A1. However, even for blade bodies 10 whose cutting edges 11 face longitudinally along the hair movement direction A1, covering them with the comb teeth 315a makes it possible to shave safely.

[0070] Furthermore, the spacing I1 between the multiple comb teeth 315a is set to 1.0 mm or less, and the shortest distance L1 from the skin contact surface 25 to the cutting edge 11 is set to 0.15 mm or more. In this way, setting the spacing I1 between the comb teeth 315a to 1.0 mm or less prevents the skin from getting caught between the comb teeth 315a, thereby preventing the skin from being injured by the blade body 10. Furthermore, the comb teeth 315a ensure that the shortest distance L1 from the skin contact surface 25 to the cutting edge 11 is 0.15 mm or more, so the cutting edge 11 can be spaced slightly away from the skin, preventing the cutting edge 11 from directly contacting the skin and further reducing the risk of skin injury.

[0071] (3) The body 30 of the razor 1 of the first embodiment has an arched cross section and a dome shape that is rotationally symmetric about the apex of the arch.

[0072] By making the body 30 dome-shaped, the razor 1 can be used by gripping it as if enveloping the entire body 30, making it easy to hold and use. Furthermore, when shaving by moving the razor 1 in various directions, the dome shape, i.e., the circular shape when viewed from above, does not limit the direction of movement of the razor 1 depending on the shape, and shaving can be performed by moving it in any direction. This also increases the degree of freedom in shaving operability. In particular, as hair removal is increasingly being done at younger ages, and razors are sometimes used by minors, making the body 30 dome-shaped makes it easy to use even for younger people.

[0073] Furthermore, since the opening 21 is a regular polygon in the skin contact surface 25, if the body 30 is made dome-shaped, the razor 1 can be designed with a rounded shape and a soft impression. Therefore, even though the razor 1 is a cutting tool, it can give the user a gentle impression.

[0074] (4) The body 30 is provided with a hollow portion 33 and a communication hole 321 that connects the hollow portion 33 to the outside of the body 30. By forming such a communication hole 321 in the body 30, if water or shaved hair gets into the hollow portion 33 of the body 30, it is possible to discharge these substances, and the razor 1 can be kept clean.

[0075] Furthermore, when the body 30 is dome-shaped with an arched cross section, forming a plurality of communication holes 321 in a row in the circumferential direction around the apex of the arch allows water and dirt to be discharged at any position. Furthermore, the communication holes 321 act as a grip, improving the stability of holding the razor 1 when shaving. In addition, the presence of the communication holes 321 adds an accent and can enhance the design of the razor 1.

[0076] (5) The body 30 and the bottom 20 are connected to each other, and the blade 10 is sandwiched between them. Specifically, the body 30 is provided with a comb structure 315 having multiple comb teeth 315a, and a pressing portion 314a that presses the blade 10 on the inside of the cutting edge 11 of the blade 10. The bottom 20 is also provided with a seat 22, and the blade 10 is sandwiched between the pressing portion 314a and the seat 22. A flow path-forming groove 24 that surrounds the seat 22 and leads to the opening 21 is provided at a location corresponding to the periphery of the blade 10, and a clearance is provided between the comb teeth 315a and the blade 10 on the cutting edge 11 side of the pressing portion 314a of the blade 10.

[0077] In this way, the provision of the flow path groove 24 forms a flow path for rinsing with water. Therefore, hair can be washed away with a water flow through the flow path groove 24. Furthermore, since a clearance is provided between the comb teeth 315a and the blade body 10, even if shaved hair remains between the comb teeth 315a and the blade body 10, it is not pinched tightly, and can be easily washed away with water. Specifically, as shown by the thick arrows in Figures 5 and 6, when water is poured through the communication hole 321, the cavity, clearance, and flow path groove 24 within the razor 1 act as a flow path, allowing the water to flow easily. Therefore, the razor 1 can be easily cleaned. Regarding cleaning the razor 1, the same effect can be achieved by pouring water into the opening 21 side instead of through the communication hole 321 and discharging it from the communication hole 321 side.

[0078] (6) With the razor 1 of this embodiment, shaving can be easily performed by simply moving the razor in any direction while contacting the skin with the skin contact surface 25. In this way, by realizing a razor 1 that is easy for anyone to use, it becomes easier to keep the razor clean by removing unwanted hair, and it can contribute to Goal 3 of the 17 Sustainable Development Goals (SDGs) adopted at the United Nations Summit, which is to "ensure good health and well-being for all."

[0079] Furthermore, the blade 10 can be made into a simple shape with a straight cutting edge 11, and because a ready-made product can be used as the blade 10, waste can be reduced, contributing to SDG Goal 12, "Responsible Consumption and Production." In addition, because the blade 10 can be manufactured using existing equipment, the manufacturing process can be simplified and the amount of surplus material that would otherwise be wasted can be reduced, contributing to SDG Goals 12 and 13.

[0080] (Second embodiment) The second embodiment will be described. This embodiment is different from the first embodiment in that the structure of the body 30 and the like are changed, but the rest is the same as the first embodiment, so only the parts that are different from the first embodiment will be described.

[0081] 10, the razor 1 of this embodiment is provided with a grip 40 that protrudes from the body 30 on one side of the body 30 opposite the skin contact surface 25. The grip 40 may be formed integrally with the cover 32 of the body 30, or may be configured to be connected to the cover 32, for example.

[0082] The gripping portion 40 has a structure in which the dimension of the skin contact surface 25 in the planar direction is enlarged on the tip side protruding from the body portion 30. Specifically, the gripping portion 40 has a structure having a side surface 41 and a tip portion 42.

[0083] The direction along the central axis C of the gripping portion 40 is the height direction, and the dimension of the skin contact surface 25 of the side surface 41 in the planar direction gradually decreases as the height from the body portion 30 increases, and then gradually increases from the middle. In other words, the side surface 41 has a constricted shape at a position midway in the height direction. There is a seamless connection between the side surface 41 and the body portion 30, with no steps or joints. The tip portion 42 has an elliptical shape when viewed from the direction along the central axis C, and is curved so as to gradually approach the body portion 30 in one direction from the central axis C indicated by arrow A2 in the figure.

[0084] In this embodiment, the thickness of the body 30 is thinner than in the first embodiment, but the thickness of the body 30 is arbitrary. Also, the body 30 does not have a communication hole 321, but the body 30 may have a communication hole 321. Even in this case, the razor 1 can be washed by pouring water into the opening 21 side.

[0085] As described above, since the present embodiment is provided with the grip portion 40, the razor 1 can be held and used using the grip portion 40. For example, as shown in Fig. 11, the razor 1 can be held by wrapping the hand around the grip portion 40, that is, by placing the thumb 51 in contact with the side surface 41 and covering the grip portion 40 with the other fingers. In this case, the tip portion 42 is curved so that it gradually approaches the body portion 30 in one direction, so that it matches the shape of the thumb 51 when gripping the razor 1, allowing the grip portion 40 to be held in a comfortable manner.

[0086] 12, when the razor 1 is held by hand, the gripping portion 40 is held between the index finger 52 and the middle finger 53, while the body portion 30 is gripped with the thumb 51, as shown in FIG. 13. In this case, the side surface 41 has a constricted shape, so that the gripping portion 40 can be comfortably held between the index finger 52 and the middle finger 53, allowing the gripping portion 40 to be held in a comfortable manner. Furthermore, the tip portion 42 has a curved shape that gradually approaches the body portion 30 in one direction, so that it matches the shape of each finger when gripping the razor 1, allowing the gripping portion 40 to be held in a comfortable manner. Then, hair can be shaved by pressing the razor 1 toward the skin and smoothing it as shown by the arrow in the figure.

[0087] In this way, by providing the grip portion 40 on the side of the body portion 30 opposite the skin contact surface 25, it becomes possible to shave stably by holding the grip portion 40.

[0088] (Other embodiments) The present disclosure is not limited to the above-described embodiments and can be modified as appropriate within the scope of the claims. Furthermore, in the above-described embodiments, it goes without saying that the elements constituting the embodiments are not necessarily essential unless they are specifically stated as essential or are clearly considered essential in principle. Furthermore, in the above-described embodiments, when numerical values ​​such as the number, numerical value, amount, and range of components of the embodiments are mentioned, they are not limited to the specific number unless they are specifically stated as essential or are clearly limited to a specific number in principle. Furthermore, in the above-described embodiments, when the shape, positional relationship, etc. of components, etc. are mentioned, they are not limited to the shape, positional relationship, etc. unless they are specifically stated or are clearly limited to a specific shape, positional relationship, etc. in principle.

[0089] For example, in each of the above embodiments, the body 30 is provided with the comb structure 315, and the portions of the bottom 20 that correspond to the sides of the regular polygonal shape formed by the opening 21 are set as the straight line portions 21a. This is an example, and the linear portions 314b of the pressing portion 314a of the body 30 may be formed up to a position close to the cutting edge 11, so that the bottom 20 is provided with the comb structure.

[0090] In each of the above embodiments, the cutting edge 11 is covered with the cover portion 315b of the comb teeth 315a of the comb structure 315 to prevent injury to the skin. Alternatively, a sheet-like guard sheet having a plurality of holes formed along the cutting edge 11 may be attached to the blade body 10, and the cutting edge 11 may be exposed through the plurality of holes to prevent injury to the skin with the guard sheet.

[0091] Furthermore, in the above embodiments, the opening 21 is configured as a regular polygon, and the cutting edges 11 of the multiple blade bodies 10 are also arranged in a regular polygonal shape. However, these may be polygonal shapes, and are not necessarily regular polygonal. For example, the four sides of a pentagon may be the same size, with the remaining side being longer or shorter than the other four sides. Furthermore, when using a polygonal shape with an even number of sides, with multiple pairs of parallel sides, the polygon may be elongated, with one pair of opposing sides longer than the other two pairs of opposing sides. When using polygonal shapes that are not regular polygons, such as these, the dimensions of the blade bodies 10 can be varied to form a polygonal shape. However, even in this case, blade bodies 10 with a simple shape, such as linear cutting edges 11, may be used, even if they are different in size. Pre-made products may also be used.

[0092] As described above, the "regular polygon" described in each embodiment does not mean a strictly regular polygon, but means that the overall contour shape is approximately a regular polygon. In each embodiment, the opening 21 has a shape including a linear portion 21a and a discharge hole 21b. Therefore, although the shape of the opening 21 is not a strictly regular polygon, the overall contour shape is close to a regular polygon. While each side of the opening 21 has a linear portion 21a, the sides may be curved or wavy. Similarly, a regular polygon shape is formed by arranging the cutting edges 11 of multiple blade bodies 10 facing each other. However, because there are gaps between the blade bodies 10, the shape of the cutting edges 11 when arranged is not a strictly regular polygon, but the overall contour shape is close to a regular polygon. [Explanation of symbols]

[0093] 1...razor, 10...blade, 11...cutting edge, 12...long hole, 13...projection, 20...bottom, 21...opening, 21a...straight portion, 21b...discharge hole, 22...seat, 22a...surface, 23...engaging projection, 23a, 23b...projections, 24...flow path forming groove, 25...skin contact surface, 26...first locking portion, 26a...through hole, 27...flat surface, 28...curved surface, 30...body portion, 31...housing portion, 32...lid portion, 33...hollow portion, 40...grip portion, 41...side surface, 42...tip portion, 51...index finger, 52...middle finger, 53...thumb, 311...outer edge portion, 311a...connecting portion, 311b...window portion, 312...body portion, 313...second locking portion, 313a...base end, 313b...locking piece, 313c...convex portion, 314...support wall, 314a...pressing portion, 314b...linear portion, 314c...cylindrical portion, 314d, 314e...engagement hole, 315...comb structure, 315a...comb teeth, 315b...cover portion, 316...connecting protrusion, 321...communicating hole, 322...flat surface

Claims

1. Multiple blades (10) having a straight cutting edge (11) for shaving hair, The blade body has an opening (21) that exposes the cutting edge, and a skin contact surface (25) that comes into contact with the skin, It comprises a body portion (30) which is integrated with the skin contact surface and forms a hollow portion (33) connected to the opening, A razor in which the openings are arranged in a polygonal shape, and the cutting edges of the plurality of blades are positioned along each side of the polygon formed by the openings, so that the cutting edges of the plurality of blades face each other and are arranged in a polygonal shape.

2. The comb structure (315) includes a comb structure (315) that covers each of the multiple cutting edges of the multiple blades, and has multiple comb teeth (315a) that protrude inward from the covered cutting edges of the opening, so that the hair passes through the comb teeth before touching and being cut by the cutting edges, The razor according to claim 1, wherein the spacing between the multiple comb teeth (I1) is 1.0 mm or less, and the shortest distance (L1) from the skin contact surface to the cutting edge of the blade is 0.15 mm or more.

3. The razor according to claim 1, wherein there are five or more blades, and the five or more blades are arranged in a polygonal shape having five or more sides, and the opening is a polygonal shape having five or more sides.

4. The razor according to claim 3, wherein when the razor is moved in an arbitrary direction while the skin is in contact with the skin contact surface and hair is shaved with one of the plurality of blades, the angle between the tip of at least one of the plurality of blades and the direction of movement is 45 degrees or more.

5. The razor according to any one of claims 1 to 4, wherein the body portion has an arched cross-sectional shape and forms a dome shape that is rotationally symmetrical with respect to the apex of the arch.

6. The razor according to any one of claims 1 to 4, wherein the body portion opposite to the skin contact surface is provided with a gripping portion (40) that protrudes from the body portion to the opposite side, and at the protruding tip side, the dimensions in the surface direction of the skin contact surface are enlarged.

7. The razor according to any one of claims 1 to 4, wherein the body portion is provided with a communication hole (321) connecting the hollow portion and the outside of the body portion.

8. The aforementioned fuselage section has an arched cross-sectional shape, forming a dome shape centered on the apex of the arch. The razor according to claim 7, wherein the communication holes are formed in a plurality of arrangements in the circumferential direction centered on the vertex.

9. Having a bottom portion (20) that constitutes the skin contact surface, The body portion and the bottom portion are connected, and the blade is held between the body portion and the bottom portion. The body portion has the comb structure and also has a pressing portion (314a) that presses the blade body inside the blade tip, and a clearance is provided between the comb teeth of the comb structure and the blade body on the blade tip side of the pressing portion. The bottom is, A seat portion (22) that contacts the blade body and clamps the blade body together with the pressing portion, In a location corresponding to the periphery of the blade body, a flow channel groove (24) is formed that surrounds the seat portion and extends to the opening, and is recessed compared to the seat portion. The razor according to claim 2, having the following features.

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