Thinning scissors

Abstract

To provide combing scissors for surely cutting hair positioned between the projecting end part of comb teeth and a bar blade by locking it by a groove, capable of providing natural dispersion in a combing state and a cutting state and not requiring high accuracy in the formation and assembly of the comb teeth and the groove.SOLUTION: The comb blade has a plurality of comb teeth protruding along a tangential direction of a rotation trajectory of the comb blade, and at least a part of the plurality of comb teeth formed on the comb blade has, on a protruding end surface thereof, one or a plurality of grooves recessed in a direction opposite to the protruding direction and formed along a thickness direction of the comb blade, among the plurality of comb teeth, at least one set of a combination of comb teeth having different numbers of grooves formed therein is provided, or at least one set of a combination of comb teeth having grooves formed therein and comb teeth having no grooves formed therein is provided.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to hair scissors.

Background Art

[0002] A hair scissors including a comb blade, a bar blade, and a shaft support for rotatably connecting the comb blade and the bar blade to each other is conventionally known. The comb blade has a plurality of comb teeth protruding along the tangential direction of its rotation locus. With the hair scissors, the hair located between the protruding end of the comb teeth and the bar blade is cut, and the hair located between adjacent comb teeth is combed, so that the volume of the hair in that part can be appropriately adjusted without changing the hair length.

[0003] As an improvement of this, there is a known hair scissors in which a plurality of three or more grooves are formed in the bar blade, the intervals between adjacent grooves are made different, and a plurality of grooves having different depths are provided (see, for example, Patent Document 1).

[0004] According to the hair scissors of the above document, the hair located between the protruding end of the comb teeth and the bar blade can be securely cut by being locked in the groove portion, and by the difference in the density of the grooves provided and the difference in depth, variations are intentionally provided in the state of combing the hair and the state of cutting the hair, enabling a natural finish.

[0005] On the other hand, for the hair scissors of the above document, it is necessary to precisely align the relative positions of the groove portion formed in the bar blade and the comb teeth formed in the comb blade. Therefore, high precision is required for the connection between the bar blade and the comb blade and the formation of the comb teeth and grooves.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] The present invention aims to provide thinning scissors that securely cut hair located between the protruding ends of the comb teeth and the blade by engaging it with grooves, while allowing for natural variations in the thinning and cutting state, and without requiring high precision in the formation and assembly of the comb teeth and grooves. [Means for solving the problem]

[0008] To solve the above problems, the device comprises a comb blade, a rod blade, and a pivot that rotatably connects the comb blade and the rod blade, wherein the comb blade has a plurality of comb teeth that protrude along the tangential direction of its rotational trajectory, and at least some of the comb teeth formed on the comb blade have one or more grooves formed on their protruding end faces, recessed in the direction opposite to the direction of protrusion and along the thickness direction of the comb blade, and at least one set of comb teeth is provided in which the number of grooves formed on each of the plurality of comb teeth are different from each other, or at least one set of comb teeth is provided in which a comb tooth with a groove is formed and a comb tooth without a groove is formed. The comb blade is provided with a decreasing region where the density of the grooves gradually decreases from the tip to the base of the blade, and an increasing region where the density of the grooves gradually increases. It is characterized by the following.

[0009] The comb may be configured such that, among the multiple comb teeth, there are multiple combinations of comb teeth with different numbers of grooves formed on them, and also multiple combinations of comb teeth with grooves and comb teeth without grooves.

[0010] The comb blade has a decreasing region where the density of the grooves gradually decreases from the tip to the base of the blade, and an increasing region where the density of the grooves gradually increases. Mutually multiple It may be considered to have been established.

[0011] The comb teeth may be formed in a curved shape along the rotational trajectory of the comb blades.

[0012] The protruding end of the comb teeth is made into an enlarged portion whose cross-sectional area is larger than that of the other parts. One or more grooves, The enlarged portion protruding end face to , provided in a biased manner towards the tip of the blade It may be considered as such. [Effects of the Invention]

[0013] Because grooves are provided on the comb teeth, high precision is not required in forming the blade side. Furthermore, by providing at least one set of grooved comb teeth in which the number of grooves formed on each tooth differs from that of the multiple comb teeth, or by providing at least one set of comb teeth with grooves and comb teeth without grooves, it is possible to create natural variations in the thinning and cutting state. [Brief explanation of the drawing]

[0014] [Figure 1] This is a front view of thinning shears to which the present invention is applied. [Figure 2] Figure 1 is a magnified front view of the blade portion of the thinning shears. [Figure 3] (A) is a front view of the comb teeth, and (B) is a view of (A) taken via arrow B. [Figure 4] This is an enlarged front view of the cutting edge side of a pair of blades. [Figure 5] This is an enlarged front view of the cutting edge side of a pair of thinning scissors according to another embodiment. [Modes for carrying out the invention]

[0015] Figure 1 is a front view of thinning scissors to which the present invention is applied. The thinning scissors shown in the figure include a pair of blades 1 and 2, handles 3 and 4 integrally formed on each blade 1 and 2 and extending in the direction opposite to the cutting edge (tip) of each blade 1 and 2, ring-shaped finger rings 6 and 7 integrally formed on the base ends of each handle 3 and 4, which are the ends opposite to the blades 1 and 2, and a screw part (pivot part) 8 that connects the pair of blades 1 and 2 so that they can rotate relative to each other at their base end portions.

[0016] For convenience, in this example, we define the thickness direction of blades 1 and 2 as the front-to-back direction, and the overall length direction of the thinning shears as the left-to-right direction, and the following explanation will be based on this premise.

[0017] One of the pair of blades 1 and 2 is formed into a comb-shaped blade 1, and the other is a rod blade 2. Similar to a common hair clipper, the comb blade 1 is a stationary blade, and the rod blade 2 is a movable blade. The finger hole 6a formed in the finger ring 6 on the handle 4 side extending integrally from the rod blade 2 is usually a finger hole through which the thumb passes. On the other hand, the finger hole 7a formed in the finger ring 7 on the handle 3 side extending integrally from the comb blade 1 is usually a finger hole through which the ring finger or the middle finger passes.

[0018] On the part of the finger ring 7 near the comb blade 1, a rod-shaped finger hook 9 protruding on the side away from the cutting edge of the comb blade 1 on the outer side of its ring shape and on the side separated from the other finger ring 6 is integrally formed. With the little finger hooked on this finger hook 9, the ring finger is inserted into the finger hole 7a of the finger ring 7, or with the ring finger hooked, the middle finger is inserted into the finger hole 7a of the finger ring 7.

[0019] On the part of the finger ring 6 near the rod blade 2, a rod-shaped hit point 11 protruding on the side of the finger ring 7 on the comb blade 1 side on the outer side of its ring shape is integrally formed. When switching from the state where the pair of blades 1 and 2 are open to the state where they are closed and overlap each other, the hit point 11 of the finger ring 6 collides with the other finger ring 7, generating an impact sound, enabling the operator to recognize that this hair clipper will not close any further.

[0020] The screw part 8 is a conventionally known connector that connects the comb blade 1 and the rod blade 2. The details of its structure are omitted. For example, it has a male screw, a female screw, and a bearing. The male screw and each of the male screws are inserted into the connecting holes drilled in the pair of blades 1 and 2 respectively, and with a bearing interposed therebetween, they are screwed together to connect the pair of blades 1 and 2 rotatably with respect to each other.

[0021] Figure 2 is an enlarged front view of the blade part of the hair clipper in Figure 1. The blade line 2a of the rod blade 2 has a shape in which the central part bulges in an arc shape with respect to the cutting edge side and the blade root side, improving the sharpness.

[0022] The comb blade 1 has a plurality of comb teeth 12 arranged in its longitudinal direction. Each comb tooth 12 is formed to protrude along the tangential direction of the rotational trajectory of the comb blade 1. More specifically, the shape of the comb teeth 12 is curved in an arc along the rotational trajectory of the comb teeth 12.

[0023] The imaginary line L, formed by connecting the tips of the multiple comb teeth 12, has a shape similar to the shape of the cutting edge 2a of the rod blade 2, with its central part bulging in an arc shape relative to the cutting edge and the base of the blade. Furthermore, the distance from the threaded portion 8 at the tip of the comb tooth 1 is set to be slightly shorter than the distance from the threaded portion 8 at the tip of the rod blade 2.

[0024] Figure 3(A) is a front view of the comb teeth, and (B) is a view taken along arrow B in (A). As shown in Figures 2 and 3, an enlarged portion 13 is integrally formed on the protruding end (tip side) of the comb teeth 12, which is longer in the overall length direction of the comb blade 1 than the middle and base portions, and has an enlarged cross-sectional area. The tip surface of this enlarged portion 13 (the protruding end surface of the comb teeth 12) is inclined toward the side where the comb teeth 12 protrude from the cutting edge toward the base of the comb blade 1.

[0025] On the end faces of the comb teeth 12 in the comb blade 1, recessed grooves 13a are formed in the thickness direction of the comb blade 1 and in the direction opposite to the protruding direction of the comb teeth 12. Incidentally, one or more grooves 13a provided on a single comb tooth 12 are provided in a manner that is biased toward the part of the cutting surface closer to the cutting edge.

[0026] For example, in the example shown in Figure 3, three grooves 13a are concentrated on the cutting edge side half of the cut surface. These three grooves 13a have the same or approximately the same depth, and the spacing between adjacent grooves is the same or approximately the same.

[0027] Figure 4 is an enlarged front view of the cutting edge side of a pair of blades. As shown in Figures 3 and 4, these thinning scissors are provided with five types of comb teeth 12, each with 0 to 4 grooves 13a. Here, a comb tooth 12 with 0 grooves 13a means a comb tooth 12 that does not have any grooves 13a. When a comb tooth 12 has one groove 13a, this groove 13a is recessed in the cutting edge end of the end face of the comb tooth 12. When a comb tooth 12 has multiple grooves 13a, the multiple grooves 13a are recessed in a sequential parallel manner from the cutting edge end of the end face of the comb tooth 12 toward the base of the blade.

[0028] Among the multiple comb teeth 12, at least one combination of comb teeth 12 is provided in which the number of grooves 13a formed on each of them is different from that of the other comb teeth 12, or at least one combination of comb teeth 12 with grooves 13a and comb teeth 12 without grooves 13a is provided. Furthermore, among the multiple comb teeth 12, there are multiple combinations of comb teeth 12 in which the number of grooves 13a formed on each of them is different from that of the other comb teeth 12, and there are also multiple combinations of comb teeth 12 with grooves 13a and comb teeth 12 without grooves 13a.

[0029] In the illustrated example, the comb tooth 12 closest to the cutting edge has four grooves 13a, the comb tooth 12 second closest to the cutting edge has three grooves 13a, the comb tooth 12 third closest to the cutting edge has two grooves 13a, the comb tooth 12 fourth closest to the cutting edge has one groove 13a, and the comb tooth 12 fifth closest to the cutting edge does not have a groove 13a.

[0030] In other words, the region where these five comb teeth 12 are arranged is a region in the comb blade 1 where the density of grooves 13a decreases gradually from the cutting edge towards the base of the blade.

[0031] On the other hand, as described above, the fifth comb tooth 12 closest to the cutting edge does not have a groove 13a formed thereon, the sixth comb tooth 12 closest to the cutting edge has two grooves 13a formed thereon, and the seventh comb tooth 12 closest to the cutting edge has three grooves 13a formed thereon.

[0032] In other words, the region where these five comb teeth 12 are arranged is a region in the comb blade 1 where the density of grooves 13a gradually increases from the cutting edge towards the base of the blade.

[0033] Incidentally, the thinning scissors in this example are provided with 29 comb teeth 12, and the number of grooves 13a on each comb tooth 12 changes from the tip to the base of the comb blade 1 as follows: 4→3→2→1→0→2→3→4→3→2→1→0→2→3→4→3→2→1→0→2→3→4→3→2→1→0→2→3→4. In other words, the comb blade 1 is provided with alternating decreasing and increasing regions from the tip to the base of the blade. The depth of the grooves 13a is set to 0.07~0.09 [mm].

[0034] With thinning scissors configured as described above, the density of the grooves 13a changes continuously throughout its entire length by the comb blades 1, resulting in natural variations in the thinning state and making it possible to adjust the volume of the hair without any discomfort.

[0035] Next, with reference to Figure 5, another embodiment of the present invention will be described in terms of its differences from the above-described embodiment.

[0036] Figure 5 is an enlarged front view of the cutting edge side of a pair of thinning scissors according to another embodiment. The number of comb teeth 12 provided on the comb blade 1 is 28, and the number of grooves 13a on each comb tooth 12 may change from the cutting edge to the base of the comb blade 1 as follows: 4→3→2→1→2→3→4→4→3→2→1→2→3→4→4→3→2→1→2→3→4→4→3→2→1→2→3→4. In other words, this other example of thinning scissors does not have comb teeth 12 that do not have grooves 13a. [Explanation of Symbols]

[0037] 1 comb blade 2 bar blade 8 axis branches 12 comb teeth 13 Enlarged section 13a Groove

Claims

1. Comb blades, A rod blade and The comb blade and the rod blade are connected to each other by a pivot support that allows them to rotate relative to one another. The comb blade has a plurality of comb teeth that protrude along the tangential direction of its rotational trajectory, At least some of the comb teeth formed on the comb blade have one or more grooves formed on their protruding end faces, in the direction opposite to the direction of protrusion and along the thickness direction of the comb blade. Among the multiple comb teeth, at least one set of comb teeth is provided in which the number of grooves formed on each tooth differs from that of the comb teeth, or at least one set of comb teeth is provided in which a groove is formed and a comb tooth is not formed. The comb blade is provided with a decreasing region in which the density of grooves gradually decreases from the tip of the blade towards the base of the blade, and an increasing region in which the density of grooves gradually increases. Thinning scissors characterized by the following.

2. Among the multiple comb teeth, several combinations are provided in which the number of grooves formed on each tooth differs from that of the comb teeth, and several combinations are also provided in which comb teeth have grooves and comb teeth do not have grooves. The thinning scissors according to claim 1.

3. The comb blade is provided with multiple decreasing regions where the density of grooves gradually decreases from the tip to the base of the blade, and increasing regions where the density of grooves gradually increases. The thinning scissors according to claim 1.

4. The comb teeth are curved along the rotational trajectory of the comb blades. The thinning scissors according to claim 1.

5. The protruding end of the comb teeth is made into an enlarged portion whose cross-sectional area is larger than that of the other parts. One or more grooves are provided on the protruding end face of the enlarged portion, biased toward the cutting edge. The thinning scissors according to claim 1.

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