JP2015192833A - Hair clipper, head unit of the same, and movable blade of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hair clipper, a head unit of the same, and a movable blade of the same which hardly stimulate a target portion.SOLUTION: A movable blade 40 of a head clipper comprises a plurality of unit blades 41. A tip region 50, an intermediate region 60, and a root region 70 having different edge angles from each other are formed side by side in a longitudinal direction of the unit blade 41. The tip region 50 is formed on the tip side of the unit blade 41 and has an edge angle which hardly stimulates a target portion compared to the intermediate region 60 and the root region 70. The root region 70 is formed on the root side of the unit blade 41 and has an edge angle with smaller cutting resistance of hair compared to the tip region 50 and the intermediate region 60. The intermediate region 60 is formed between the tip region 50 and the root region 70 of the unit blade 41, and its edge angle is set so as to change the edge angle smoothly from the tip region 50 toward the root region 70.

Description

  The present invention relates to a clipper, a head unit thereof, and a movable blade thereof.

  The usage pattern of the clipper is classified into, for example, a usage pattern in which the attachment is attached to the main body and the cutting height is adjusted, and a usage pattern in which the hair is cut short without using the attachment. According to the latter form of use, since the fixed blade is directly applied to the target site such as the skin, a part of the target site enters between the fixed blade and the movable blade, and the fixed blade and the movable blade are the part. May cause strong irritation. Since such a stimulus may cause discomfort to the person to be cut, it is preferable that the stimulation does not occur as much as possible.

  Patent Document 1 discloses an example of a hair clipper head unit for solving the above-described problems. This head unit has a fixed blade having a plurality of unit blades arranged in the width direction and a movable blade having a plurality of unit blades arranged in the width direction. The unit blade of the movable blade has a first region and a second region having different blade edge angles. The first region is formed in a portion on the base side in the longitudinal direction of the movable blade, and the edge angle thereof is set to an angle within a predetermined range suitable for hair cutting. The second region is formed at a tip side portion of the movable blade in the longitudinal direction, and the blade edge angle is set larger than the blade edge angle of the first region.

  According to this head unit, since the cutting edge angle on the tip side of the movable blade that easily sandwiches the target portion is set large, a part of the target portion enters between the unit blade of the fixed blade and the unit blade of the movable blade. Even if it does, it is hard to give a strong irritation | stimulation to the part by a fixed blade and a movable blade.

Japanese Patent Laid-Open No. 11-57244

  According to the movable blade of Patent Document 1, there may be variations in the length of the first region and the length of the second region due to manufacturing errors. For example, when the length of the second region is shorter than the preferred range, the length of the first region is increased according to the difference between the preferred length and the actual length of the second region. The shape of the unit blade of such a movable blade is explained as follows when it is examined from the functions of the first region and the second region.

  The second region contributing to making it difficult to give strong stimulation to the target site does not exist at a position closer to the tip side of the unit blade than the position designed in advance when viewed from the tip side of the unit blade of the movable blade. Instead, the first region suitable for hair cutting begins to exist at a position closer to the tip of the unit blade than the position designed in advance.

  For this reason, the amount of the target part that has entered between the unit blade of the movable blade and the unit blade of the fixed blade whose length of the second region is shorter than the preferred range is the length of the first region and the second region. If the length of each region is included in the preferred range, even if the amount is such that strong stimulation is not given from each unit blade, the length of the second region is short from each unit blade. A strong stimulus may be given.

  An object of the present invention is to provide a clipper that hardly gives a stimulus to a target site, a head unit thereof, and a movable blade thereof.

  According to an independent embodiment of the movable blade of the clipper, the tip region, the intermediate region, and the root region, which have a movable blade having a plurality of unit blades and have different edge angles, are arranged in the longitudinal direction of the unit blade. The tip region is formed on the tip side of the unit blade, and has a cutting edge angle that is less likely to irritate a target site compared to the intermediate region and the root region, the root region is The unit blade is formed on the root side of the unit blade, and has a cutting edge angle that has a smaller hair cutting resistance than the tip region and the intermediate region, and the intermediate region includes the tip region of the unit blade. The edge angle is set so as to smoothly change the edge angle from the tip area to the root area.

  According to the clipper, the head unit, and the movable blade, it is difficult to stimulate the target site.

The disassembled perspective view of the clipper of embodiment. The side view of the head unit of an embodiment. The front view of the head unit of an embodiment. The perspective view of the fixed blade and movable blade of embodiment. The front view of the fixed blade and movable blade of embodiment. The side view of the unit blade of the fixed blade of embodiment, and the unit blade of a movable blade. The front view of the unit blade of the movable blade of embodiment. Sectional drawing which follows the Z8A-Z8A line | wire of FIG. Sectional drawing which follows the Z8B-Z8B line | wire of FIG. Sectional drawing which follows the Z8C-Z8C line | wire of FIG. Sectional drawing which follows the Z8D-Z8D line | wire of FIG. Sectional drawing which follows the Z8E-Z8E line | wire of FIG. Sectional drawing which follows the Z8F-Z8F line | wire of FIG. Sectional drawing which follows the Z8G-Z8G line | wire of FIG. Sectional drawing which follows the Z8H-Z8H line | wire of FIG. Sectional drawing which follows the Z8I-Z8I line | wire of FIG. Sectional drawing which follows the Z8J-Z8J line | wire of FIG.

(An example of the shape of this clipper blade and clipper)
[1] According to an independent embodiment of the movable blade of the clipper, the tip region, the intermediate region, and the root region having a movable blade having a plurality of unit blades and having different blade edge angles are the length of the unit blade. The tip region is formed on the tip side of the unit blade, and has a cutting edge angle that is less likely to irritate a target site compared to the intermediate region and the root region, The region is formed on the root side of the unit blade, and has a cutting edge angle that has a smaller hair cutting resistance than the tip region and the intermediate region, and the intermediate region is the one of the unit blades. The edge angle is set so that the edge angle is formed between the tip area and the root area, and the edge angle is smoothly changed from the tip area to the root area.

  According to the movable blade of this clipper, when the length of the tip region is shorter than the preferred range, the intermediate region where the change in the blade edge angle relative to the tip region is gentler than the pre-designed position compared to the root region. Also begins to exist near the tip of the unit blade. On the other hand, the tip region side portion of the intermediate region is formed so that the blade edge angle smoothly changes from the tip region. For this reason, the portion has substantially the same degree as the tip region or approximately the same degree as the tip region in that it contributes to making it difficult to give a strong stimulus to the target site. For this reason, even when the length of the tip region is shorter than the preferred range, the fixed blade unit blade is compared with the configuration in which the tip region and the root region are continuously formed without the intermediate region. In addition, it is difficult for the unit blade of the movable blade to give a strong stimulus to the target part that has entered between them.

[2] According to one embodiment depending on the movable blade of the clipper, the entire cutting edge angle of the tip region is larger than the cutting edge angle of the intermediate region and the cutting edge angle of the root region.
According to the movable blade of this clipper, compared with a configuration in which a part of the edge angle of the tip region is smaller than the edge angle of the intermediate region and the edge angle of the root region, it becomes more difficult to stimulate the target part.

  [3] According to one embodiment depending on the movable blade of the clipper, the blade width of the intermediate region gradually decreases from the tip region side toward the intermediate portion of the intermediate region, It gradually becomes wider toward the root area.

  According to the movable blade of the hair clipper, when the unit blade of the movable blade comes in contact with the hair, the hair may move along the edge of the unit blade. The movement of the bristles is easily urged in a direction in which the blade width of the unit blade becomes narrower because the unit blade of the movable blade reciprocates in the short direction of the unit blade with respect to the fixed blade. For this reason, it becomes easy for hair to gather in the middle part of a middle field. Moreover, since each hair is thin, it is not easy to cut hair by itself. However, it has been confirmed that when a plurality of hairs are cut simultaneously, the hair is more easily cut than when hairs are cut alone. This suggests that the hair gathered in the intermediate part of the intermediate region is likely to be cut. For this reason, according to the movable blade of this hair clipper, hair becomes easy to be cut.

[4] According to one embodiment dependent on the movable blade of the clipper, the rake face formed in the intermediate region is a curved surface.
The cutting edge angle of the unit blade varies depending on the shape of the rake face formed on the unit blade. For example, when the shape of the rake face is an inclined surface, it is difficult to change the edge angle. That is, when the shape of the rake face formed in the intermediate region is an inclined surface, it is difficult to manufacture a shape that smoothly changes the edge angle of the intermediate region from the tip region to the root region.

  According to the movable blade of this clipper, since the shape of the rake face formed in the intermediate region is a curved surface, it is easy to change the edge angle of the intermediate region. For this reason, compared with the case where the shape of the rake face formed in the intermediate region is an inclined surface, it is easy to manufacture a shape that smoothly changes the edge angle of the intermediate region from the tip region to the root region.

[5] According to one embodiment depending on the movable blade of the clipper, the length of the root region in the longitudinal direction of the unit blade is more than half of the total length of the unit blade.
According to the inventor of the present application, it has been confirmed that when the length of the root region in the longitudinal direction of the unit blade is half or more of the entire length of the unit blade, a significant effect is obtained on the ability to cut hair. For this reason, according to the movable blade of this hair clipper, it contributes to the improvement of the ability to cut hair.

[6] According to an independent form of the head unit of the present clipper, the movable blade of the clipper according to any one of [1] to [5] and a fixed blade having a plurality of unit blades.
According to the head unit of the clipper, the same effect as that obtained by the movable blade of the clipper can be obtained.

[7] According to an embodiment dependent on the head unit of the clipper, a surface facing the fixed blade in the tip region escapes from the fixed blade.
According to the head unit of this clipper, the tip region does not contact the unit blade of the fixed blade. For this reason, even if a part of the target portion enters between the unit blade of the fixed blade and the unit blade of the movable blade, the portion is not easily sandwiched. For this reason, it is difficult for the fixed blade and the movable blade to give a strong stimulus to the portion. Further, when a part of the target region comes into contact with the tip region, the tip region acts to push back the target site. For this reason, a part of the target portion is less likely to enter between the unit blade of the fixed blade and the unit blade of the movable blade. For this reason, according to the head unit of this hair clipper, it becomes more difficult to give irritation | stimulation to an object part.

[8] According to an independent embodiment of the hair clipper, the hair clipper head unit according to any one of [6] and [7] is provided.
According to this clipper, the same effect as that obtained by the head unit of the clipper can be obtained.

(Embodiment)
The configuration of the clipper 1 will be described with reference to FIG.
The clipper 1 has a main body 10 that is held by a cut person, and a head unit 20 that is attached to the main body 10. The main body 10 has a drive unit (not shown) for driving the clipper 1 and a power supply unit (not shown) for supplying power to the drive unit.

The configuration of the head unit 20 will be described with reference to FIGS.
The head unit 20 includes a fixed blade 30 fixed to the tip of the head unit 20, a movable blade 40 that forms a reciprocating motion with respect to the fixed blade 30, a fixed frame 21 that supports the fixed blade 30, and the movable blade 40. It has a holding frame 22 that supports it. The head unit 20 further includes a spring 25 that brings the movable blade 40 and the fixed blade 30 into contact with each other.

  As shown in FIG. 2, the fixed frame 21 supports the fixed blade 30 from the side opposite to the side where the movable blade 40 is disposed with respect to the fixed blade 30, and the position of the fixed blade 30 with respect to the fixed frame 21. The fixed blade 30 is held so as not to slip. The holding frame 22 holds the movable blade 40 from the side opposite to the side where the fixed blade 30 is disposed with respect to the movable blade 40, and the movable blade 40 is prevented from being displaced with respect to the holding frame 22. 40 is held.

  As shown in FIG. 3, the holding frame 22 includes a plate 23 that is pressed against the movable blade 40 and an attachment portion 24 that is attached to the plate 23. When the head unit 20 is mounted on the main body 10 (see FIG. 1), the mounting portion 24 is connected to a part of the drive unit, and only the component in the width direction of the head unit 20 is transmitted. For this reason, the holding frame 22 forms a reciprocating movement along the width direction of the head unit 20.

  The spring 25 is attached to the fixed frame 21. The spring 25 has a role of pushing the movable blade 40 and the plate 23 toward the fixed blade 30. As an example, the spring 25 has a structure in which two torsion springs are connected to each other.

  The fixed blade 30 has a plurality of unit blades 31. The plurality of unit blades 31 are arranged at equal intervals along the width direction of the head unit 20, and slits 32 are formed between the unit blades 31 and the unit blades 31. The fixed blade 30 is fixed to the fixed frame 21.

  The movable blade 40 has a plate-like base 43 and a plurality of unit blades 41 formed so as to extend from the base 43. The plurality of unit blades 41 are arranged at equal intervals in the same direction as the unit blade 31 of the fixed blade 30, and a slit 42 is formed between the unit blade 41 and the unit blade 41. The base 43 is pushed toward the fixed blade 30 by the spring 25. For this reason, the movable blade 40 forms a reciprocating movement along the width direction of the head unit 20 so as to slide with the unit blade 31 of the fixed blade 30 along with the reciprocating movement of the holding frame 22.

With reference to FIG. 4 and FIG. 5, the structure of the unit blade 31 of the fixed blade 30 is demonstrated.
The unit blade 31 of the fixed blade 30 has a line-symmetric relationship with respect to the center line in the short direction of the unit blade 31. The unit blade 31 includes a side surface 33 that supports hair flowing into the slit 32, a front end surface 34 that is a front end surface of the unit blade 31 in the longitudinal direction, and a movable blade 40 that slides with the unit blade 41 of the movable blade 40. The sliding surface 35 which is an opposing surface is included. The distal end surface 34 has a rounded shape. As shown in FIG. 5, the blade width of the unit blade 31 that is the width of the sliding surface 35 in the short direction of the unit blade 31 is gradually narrowed toward the tip surface 34 side.

With reference to FIGS. 4-6, the structure of the unit blade 41 of the movable blade 40 is demonstrated.
The unit blade 41 of the movable blade 40 is in a line-symmetric relationship with respect to the center line of the unit blade 41 in the short direction. The unit blade 41 includes a rake surface 44 that supports the cut hair, a sliding surface 46 that is a facing surface between the sliding surface 35 of the fixed blade 30 and the fixed blade 30 that slides, and the opposite side of the sliding surface 46. And a tip surface 48 which is a tip surface of the unit blade 41 in the longitudinal direction. The rake face 44 forms a reinforcing surface 45 for reinforcing the unit blade 41 at a part of the base side of the unit blade 41.

  As shown in FIG. 5, the distance LA is open in the longitudinal direction of the unit blade 41 at the most distal portion of the distal end surface 34 of the fixed blade 30 and the distal end portion of the distal end surface 48 of the movable blade 40. Yes. This distance LA is preferably in the range of 0 to 0.7 mm. The distance LA is more preferably in the range of 0 to 0.3 mm. An example of this distance LA is 0.2 mm.

  The width of the slit 42 of the movable blade 40 is different from the width of the slit 32 of the fixed blade 30. That is, the pitch of the unit blades 41 of the movable blade 40 and the pitch of the unit blades 31 of the fixed blade 30 are different from each other. As shown in FIG. 6, the sliding surface 46 of the movable blade 40 escapes from the sliding surface 35 of the fixed blade 30.

The configuration of the rake face 44 will be described with reference to FIGS. 4 and 6.
As an example, the rake face 44 is partitioned into four faces, a first face, a second face, a third face, and a fourth face. The first surface is a surface on the distal end side in the longitudinal direction of the unit blade 41 and is an inclined surface inclined from the top surface 47 side toward the sliding surface 46 side. The second surface is a surface adjacent to the first surface, and is an inclined surface inclined from the top surface 47 side toward the sliding surface 46 side. A boundary line 49A is formed at the boundary between the first surface and the second surface.

  The third surface is a surface adjacent to the first surface and the second surface, and is a curved surface curved from the top surface 47 side toward the sliding surface 46 side. A boundary line 49B is formed at the boundary between the first surface, the second surface, and the third surface. The fourth surface is a surface on the base side in the longitudinal direction of the unit blade 41 and is a surface adjacent to the third surface, and is an inclined surface inclined from the top surface 47 side toward the sliding surface 46 side. A boundary line 49C is formed at the boundary between the third surface and the fourth surface.

Next, the configuration of the unit blade 41 will be described.
The unit blade 41 of the movable blade 40 forms an edge at the edge where the rake face 44 and the sliding face 46 are in contact with each other. When the sliding surface 46 of the movable blade 40 slides with respect to the sliding surface 35 of the fixed blade 30, this edge cuts the hair.

  In the unit blade 41, a tip region 50, an intermediate region 60, and a root region 70 having different blade edge angles are formed side by side in the longitudinal direction of the unit blade 41. The tip region 50 is formed on the tip side of the unit blade 41. The root region 70 is formed on the root side of the unit blade 41. The intermediate region 60 is formed between the tip region 50 of the unit blade 41 and the root region 70.

  The tip region 50 has a cutting edge angle that is less likely to irritate a target site such as skin compared to the intermediate region 60 and the root region 70. The edge angle of the tip region 50 corresponds to the tip rake surface 51 which is a portion corresponding to the tip region 50 of the rake face 44 of the unit blade 41 and the tip region 50 of the sliding surface 46 of the unit blade 41. This is an angle formed by the tip sliding surface 52 as a part. The edge angle of the tip region 50 is, for example, a portion closer to the tip than the boundary line 49 </ b> A formed on the rake face 44 of the unit blade 41. The tip rake face 51 constitutes the entire first face and a part of the third face.

  The root region 70 has a cutting edge angle with a smaller hair cutting resistance than the tip region 50 and the intermediate region 60. The edge angle of the root region 70 corresponds to the root rake surface 71 that is a portion corresponding to the root region 70 of the rake face 44 of the unit blade 41 and the root region 70 of the sliding surface 46 of the unit blade 41. This is an angle formed with the root sliding surface 72 as a part. The length of the root region 70 in the longitudinal direction of the unit blade 41 is at least half of the total length of the unit blade 41. The edge angle of the root region 70 is, for example, a portion closer to the root side than the boundary line 49 </ b> C formed on the rake face 44 of the unit blade 41. The root scoop surface 71 constitutes a part of the third surface and the entire fourth surface.

  In the intermediate region 60, the blade edge angle is set so as to smoothly change the blade edge angle from the tip region 50 to the root region 70. The edge angle of the intermediate region 60 corresponds to the intermediate rake surface 61 that is a portion corresponding to the intermediate region 60 of the rake surface 44 of the unit blade 41 and the intermediate region 60 of the sliding surface 46 of the unit blade 41. This is an angle formed with the intermediate sliding surface 62 as a part. The cutting edge angle of the intermediate region 60 is a portion between the cutting edge angle of the tip region 50 and the cutting edge angle of the root region 70, and decreases from the tip region 50 side to the root region 70 side. The intermediate scoop surface 61 constitutes all of the second surface and part of the third surface.

  The entire cutting edge angle of the tip region 50 is larger than the cutting edge angle of the intermediate region 60 and the cutting edge angle of the root region 70. Further, the entire cutting edge angle of the root region 70 is smaller than the cutting edge angle of the intermediate region 60. The cutting edge angle of the tip region 50 is such that the cutting edge angle on the tip side is larger than the cutting edge angle on the intermediate region 60 side.

  As shown in FIG. 6, the tip sliding surface 52 is inclined so as to be away from the sliding surface 35 of the fixed blade 30 from the intermediate region 60 side toward the tip side. For this reason, a gap S is formed between the tip sliding surface 52 and the sliding surface 35.

The blade width of the unit blade 41 of the movable blade 40 will be described with reference to FIG.
The blade width of the unit blade 41, which is the width of the edge in the short direction of the unit blade 41, is different in each of the tip region 50, the intermediate region 60, and the root region 70. The blade width of the tip region 50 gradually increases from the tip side toward the intermediate region 60 side. The blade width of the intermediate region 60 gradually decreases from the tip region 50 side toward the intermediate portion of the intermediate region 60 and gradually increases from the intermediate portion toward the root region 70 side. The blade width of the root region 70 gradually increases from the intermediate region 60 side toward the root side.

The cutting edge angle of the unit blade 41 will be described with reference to FIGS. 8A to 8J.
FIG. 8A is a cross-sectional view of the tip region 50. As an example, the edge angle of the tip region 50 of this portion is 72 °.

  8B is a cross-sectional view of the front end region 50 on the intermediate region 60 side with respect to the cross-sectional view shown in FIG. 8A. The edge angle of the tip region 50 in this portion is, for example, the same angle as the edge angle of the tip region 50 shown in FIG. 8A.

  8C is a cross-sectional view of the front end region 50 on the intermediate region 60 side with respect to the cross-sectional view shown in FIG. 8B. The edge angle of the tip region 50 of this part is smaller than the edge angle of the tip region 50 shown in FIG. 8B as an example.

FIG. 8D is a cross-sectional view of a boundary portion between the tip region 50 and the intermediate region 60. As an example, the edge angle of the boundary portion is smaller than the edge angle of the tip region 50 shown in FIG. 8C.
FIG. 8E is a cross-sectional view of the intermediate region 60. As an example, the edge angle of the intermediate region 60 of this portion is smaller than the edge angle of the boundary portion shown in FIG. 8D.

  FIG. 8F is a cross-sectional view closer to the root region 70 than the cross-sectional view shown in FIG. As an example, the edge angle of the intermediate area 60 in this portion is smaller than the edge angle of the intermediate area 60 shown in FIG. 8E.

  FIG. 8G is a cross-sectional view of the intermediate region 60 that is closer to the root region 70 than the cross-sectional view illustrated in FIG. 8F in the intermediate region 60. As an example, the edge angle of the intermediate region 60 in this portion is smaller than the edge angle of the intermediate region 60 shown in FIG. 8F.

  FIG. 8H is a cross-sectional view of the root region 70. As an example, the edge angle of the root area 70 in this portion is smaller than the edge angle of the intermediate area 60 shown in FIG. 8G. In addition, the edge angle of the root region 70 in this portion is 45 ° as an example.

  FIG. 8I is a cross-sectional view of the root region 70 on the root side with respect to the cross-sectional view shown in FIG. 8H. The edge angle of the root region 70 in this portion is, for example, the same angle as the edge angle of the root region 70 shown in FIG. 8H.

  FIG. 8J is a cross-sectional view on the root side of the cross-sectional view shown in FIG. The edge angle of the root region 70 in this portion is, for example, the same angle as the edge angle of the root region 70 shown in FIG. 8I.

The operation of the clipper 1 will be described with reference to FIG.
As an example of the usage pattern of the clipper 1 (see FIG. 1), a usage pattern for cutting hair without attaching an attachment (not shown) to the main body 10 (see FIG. 1) will be described. The cut person applies the fixed blade 30 of the clipper 1 to the target part of the person to be cut who is himself or another person, and cuts the hair of the person to be cut.

  According to this usage pattern, the fixed blade 30 of the clipper 1 is directly applied to the target site. For this reason, a part of the target portion may enter between the unit blade 31 of the fixed blade 30 and the unit blade 41 of the movable blade 40, and the fixed blade 30 and the movable blade 40 may give strong stimulation to the portion. On the other hand, according to the movable blade 40 of the clipper 1, the tip region 50 that easily sandwiches the target part has a cutting edge angle that hardly gives the target part a stimulus. For this reason, even if a part of the target portion enters between the unit blade 31 of the fixed blade 30 and the unit blade 41 of the movable blade 40, the fixed blade 30 and the movable blade 40 are unlikely to stimulate the portion.

  Furthermore, according to the movable blade 40 of the clipper 1, even when the length of the tip region 50 varies due to a manufacturing error, the unit blade 31 of the fixed blade 30 and the unit blade 41 of the movable blade 40 are targeted. Hard to give irritation. According to the movable blade 40 of the clipper 1, when the length of the tip region 50 is shorter than the preferred range, the intermediate region 60 in which the change in the edge angle with respect to the tip region 50 is gentle compared to the root region 70 in advance. It begins to exist from a position closer to the tip of the unit blade 41 than the designed position. On the other hand, a portion of the intermediate region 60 on the tip region 50 side is formed so that the blade edge angle smoothly changes from the tip region 50. For this reason, the portion has substantially the same degree as the tip region 50 or approximately the same degree as the tip region 50 in that it contributes to making it difficult to give a strong stimulus to the target site. For this reason, even when the length of the tip region 50 is shorter than the preferred range, the tip region 50 and the root region 70 are formed continuously without the intermediate region 60 being fixed. The unit blade 31 of the blade 30 and the unit blade 41 of the movable blade 40 are unlikely to give a strong stimulus to the target part that has entered between them.

  Further, according to the movable blade 40 of the clipper 1, when the length of the tip region 50 is longer than the preferred range, the corresponding amount appears not in the reduction of the root region 70 but in the change in the intermediate region 60. That is, the intermediate region 60 becomes relatively small. For this reason, even when the length of the tip region 50 is longer than the preferred range, the hair is compared with a configuration in which the tip region 50 and the root region 70 are formed continuously without the intermediate region 60. The ability to cut is difficult to decrease.

According to the clipper 1, the following effects can be obtained.
(1) According to the movable blade 40 of the clipper 1, the entire cutting edge angle of the tip region 50 is larger than the cutting edge angle of the intermediate region 60 and the cutting edge angle of the root region 70. For this reason, compared with a configuration in which a part of the edge angle of the tip region 50 is smaller than the edge angle of the intermediate region 60 and the edge angle of the root region 70, it becomes more difficult to stimulate the target part.

  (2) According to the movable blade 40 of the clipper 1, when the unit blade 41 of the movable blade 40 and the bristle contact each other, the bristle may move along the edge of the unit blade 41. The movement of the bristles is easily urged in the direction in which the blade width of the unit blade 41 becomes narrower because the unit blade 41 of the movable blade 40 reciprocates in the short direction of the unit blade 41 with respect to the fixed blade 30. According to the movable blade 40 of the clipper 1, the blade width of the intermediate region 60 gradually decreases from the tip region 50 side toward the intermediate portion of the intermediate region 60, and gradually increases from the intermediate portion toward the root region 70 side. It has become. For this reason, it becomes easy for hair to gather in an intermediate portion of the intermediate region 60.

  Moreover, since each hair is thin, it is not easy to cut hair by itself. However, it has been confirmed that when a plurality of hairs are cut simultaneously, the hair is more easily cut than when hairs are cut alone. This suggests that the hair gathered in the intermediate portion of the intermediate region 60 is likely to be cut. For this reason, according to the movable blade 40 of the clipper 1, hair becomes easy to be cut | disconnected.

  (3) The cutting edge angle of the unit blade 41 of the movable blade 40 varies depending on the shape of the rake face 44 formed on the unit blade. For example, when the shape of the rake face 44 is an inclined surface, it is difficult to change the edge angle. That is, when the shape of the intermediate rake face 61 formed in the intermediate region 60 is an inclined surface, it is difficult to manufacture a shape that smoothly changes the edge angle of the intermediate region 60 from the tip region 50 to the root region 70.

  According to the movable blade 40 of the clipper 1, since the shape of the third surface constituting a part of the intermediate rake face 61 formed in the intermediate region 60 is a curved surface, the cutting edge angle of the intermediate region 60 can be easily changed. . For this reason, compared with the case where the shape of the intermediate rake face 61 formed in the intermediate region 60 is an inclined surface, a shape that smoothly changes the edge angle of the intermediate region 60 from the tip region 50 to the root region 70 is obtained. Easy to manufacture.

  (4) According to the movable blade 40 of the clipper 1, the length of the root region 70 in the longitudinal direction of the unit blade 41 is at least half of the entire length of the unit blade 41. According to the inventor of the present application, when the length of the root region 70 in the longitudinal direction of the unit blade 41 of the movable blade 40 is half or more of the entire length of the unit blade 41, a significant effect is obtained on the ability to cut hair. Has been confirmed. For this reason, it contributes to the improvement of the ability to cut hair.

  (5) According to the head unit 20 of the clipper 1, the gap S is formed between the tip sliding surface 52 and the sliding surface 35. For this reason, the tip region 50 does not contact the unit blade 31 of the fixed blade 30. For this reason, even if a part of the target part enters between the unit blade 31 of the fixed blade 30 and the unit blade 41 of the movable blade 40, the part is not easily sandwiched. For this reason, it is difficult for the fixed blade 30 and the movable blade 40 to give a strong stimulus to the portion. Further, when a part of the target region comes into contact with the tip region 50, the tip region 50 acts to push back the target region. For this reason, a part of the target portion is less likely to enter between the unit blade 31 of the fixed blade 30 and the unit blade 41 of the movable blade 40 any more. For this reason, according to the head unit 20 of the clipper 1, it becomes more difficult to give irritation | stimulation to an object site | part.

  (6) According to the movable blade 40 of the clipper 1, the pitch of the unit blades 41 of the movable blade 40 and the pitch of the unit blades 31 of the fixed blade 30 are different from each other. For example, when the pitch of the unit blades 41 and the pitch of the unit blades 31 are the same, it is necessary to cut a large number of hairs simultaneously because the timings of cutting the hairs in the unit blades 41 are the same. In this case, it is necessary to increase the power of the electric motor that is an example of the power supply unit. For this reason, according to the movable blade 40 of the clipper 1, the pitch of the unit blades 41 of the movable blade 40 and the pitch of the unit blades 31 of the fixed blade 30 are made different from each other, so that such a situation is less likely to occur. ing.

(Modification)
The specific form that the movable blade of the clipper can take is not limited to the form exemplified in the above embodiment. The movable blade of the hair clipper can take various forms different from the above-described embodiment within the scope in which the object of the present invention is achieved. The modification of the said embodiment shown below is an example of the various forms which the movable blade of this hair clipper can take.

Whether or not the gap S is formed between the tip sliding surface 52 of the unit blade 41 of the movable blade 40 and the sliding surface 35 of the unit blade 31 of the fixed blade 30 is an arbitrary selection matter It is.
-According to the unit blade 41 of the movable blade 40 of the modification, a part of the tip region 50 on the intermediate region 60 side and the unit blade 31 of the fixed blade 30 are in contact with each other. For example, the tip sliding surface 52 of the tip region 50 is inclined so as to be away from the sliding surface 35 of the fixed blade 30 from the middle portion of the tip region 50 toward the tip side.

  -According to the unit blade 41 of the movable blade 40 of the modified example, a part of the tip region 50 and the intermediate region 60 on the tip region 50 side does not contact the unit blade 31 of the fixed blade 30. For example, the distal end sliding surface 52 of the distal end region 50 and the intermediate sliding surface 62 of the intermediate region 60 are formed on the fixed blade 30 from the distal end region 50 side of the intermediate region 60 toward the distal end side of the distal end region 50. It inclines away from the sliding surface 35.

  Whether or not the length of the root region 70 in the longitudinal direction of the unit blade 41 is more than half of the entire length of the unit blade 41 is an arbitrary choice. For example, the length of the tip region 50 of the unit blade 41, the length of the intermediate region 60, and the length of the root region 70 are the same length.

Whether or not the intermediate rake face 61 of the intermediate region 60 is a curved surface is an arbitrary choice. For example, the intermediate rake surface 61 formed in the intermediate region 60 is an inclined surface.
-According to the unit blade 41 of the movable blade 40 of the modification, the blade width of the intermediate region 60 is gradually narrowed from the tip region 50 side toward the root region 70 side. In this case, hair is likely to gather at the boundary between the intermediate region 60 and the root region 70.

A part of the edge angle of the tip region 50 of the modification is smaller than a part of the edge angle of the intermediate region 60 and the edge angle of the root region 70.
A part of the edge angle of the root area 70 of the modification is larger than a part of the edge angle of the intermediate area 60.

All the cutting edge angles of the tip region 50 of the modification form the same angle or different angles.
-A part of blade edge | corner angle of the intermediate | middle area | region 60 of a modification forms the same angle.
-Some or all of the edge angles of the root region 70 of the modified example form different angles.

  -According to the unit blade 41 of the movable blade 40 of the modified example, the boundary portion between the tip rake face 51 in the tip region 50 and the top surface 47 and the tip face 48 of the unit blade 41 is subjected to R chamfering. Form. For this reason, even if the part and a part of target part contact, it is difficult to give a stimulus to a part of target part.

DESCRIPTION OF SYMBOLS 1 ... Hair clipper 20 ... Head unit 30 ... Fixed blade 31 ... Unit blade 40 ... Movable blade 41 ... Unit blade 44 ... Rake face 50 ... Tip area 60 ... Middle area 61 ... Intermediate rake face 70 ... Root area

Claims (8)

A movable blade having a plurality of unit blades;
A tip region, an intermediate region, and a root region having different edge angles are formed side by side in the longitudinal direction of the unit blade,
The tip region is formed on the tip side of the unit blade, and has a cutting edge angle that is less likely to irritate a target site compared to the intermediate region and the root region,
The root region is formed on the root side of the unit blade, and has a cutting edge angle that has a smaller hair cutting resistance than the tip region and the intermediate region,
The intermediate region is formed between the tip region and the root region of the unit blade, and the blade edge angle is set so as to smoothly change the blade edge angle from the tip region to the root region. Movable blade. The movable blade of a clipper according to claim 1, wherein an entire cutting edge angle of the tip region is larger than a cutting edge angle of the intermediate region and a cutting edge angle of the root region. The blade width of the intermediate region gradually decreases from the tip region side toward the intermediate portion of the intermediate region, and gradually increases from the intermediate portion toward the root region side. Clipper movable blade. The movable blade of the clipper according to any one of claims 1 to 3, wherein the rake face formed in the intermediate region is a curved surface. The movable blade of the clipper according to any one of claims 1 to 4, wherein a length of the root region in a longitudinal direction of the unit blade is not less than half of a total length of the unit blade. The movable blade of the clipper according to any one of claims 1 to 5,
A hair clipper head unit having a fixed blade having a plurality of unit blades. The head unit of the clipper according to claim 6, wherein a surface facing the fixed blade in the tip region escapes from the fixed blade.   A clipper having the head unit according to claim 6.