WO2022244407A1

WO2022244407A1 - Hair-clipper blade, hair-clipper-type trimming device, and method of manufacturing hair-clipper blade

Info

Publication number: WO2022244407A1
Application number: PCT/JP2022/010647
Authority: WO
Inventors: 勝弥松尾; 浩司二杉
Original assignee: 株式会社源平刃物工場
Priority date: 2021-05-20
Filing date: 2022-03-10
Publication date: 2022-11-24
Also published as: JP2022178363A

Abstract

According to the present invention, a plate-shaped base material is provided with a body on which a plurality of blades are provided so as to protrude therefrom and a crank part which accommodates an eccentric cam that rotates upon receiving a driving force. The crank part has formed therein a crank hole that penetrates from the front to the back of the crank part and that has an inner peripheral surface on which the eccentric cam is to slide. The crank part also has a rising part that is formed along the rim of the crank hole and that rises from a surface of the base material.

Description

Hair clipper blade, hair clipper type cutting device, and method for manufacturing hair clipper blade

The present invention relates to a clipper blade that cuts an object to be cut by being reciprocated by receiving a driving force, a clipper-type cutting blade device equipped with the same, and a method for manufacturing a clipper blade.

Conventionally, there has been known a device that cuts an object to be cut, such as plants, by reciprocally driving two superimposed hair clipper blades each having a plurality of blade bodies. For example, Patent Document 1 discloses a hedge trimmer having a pair of clipper blades (cutter in Patent Document 1) having a plurality of blade bodies, and a crank hole ( A pair of eccentric cams (eccentric discs in Patent Document 1) that rotate by receiving the driving force from the engine are accommodated in the frame-shaped engaging portion), and the eccentric cams are in sliding contact with the inner peripheral surface of the crank hole. It is disclosed that two hair clipper blades are configured to reciprocate by rotating.

In the hair clipper blade in which the eccentric cam slides on the inner peripheral surface of the crank hole formed in the hair clipper blade as in Patent Document 1, it is necessary to ensure the strength of the portion where the crank hole is formed. In other words, if this portion is deformed due to its low strength, the eccentric cam will not rotate properly, and the behavior of the clipper blade may become unstable. Also, if the thickness of the portion where the crank hole is formed is thin, the eccentric cam may come off the crank hole. To address this, for example, it is conceivable to increase the strength and thickness of this portion by fixing a separate reinforcing member by welding or the like to the portion of the clipper blade where the crank hole is formed. However, in this case, there is a problem that the number of parts increases, which is disadvantageous in terms of cost, and that it takes time and effort to manufacture the hair clipper blades.

JP 2010-98972 A

The present invention has been made in view of the circumstances described above, and manufactures a hair clipper blade, a hair clipper-type cutting blade device, and a hair clipper blade that can ensure strength and thickness around the crank hole while keeping the number of parts and manufacturing man-hours small. The purpose is to provide a method.

In order to solve the above problems, the present invention provides a hair clipper blade for cutting an object to be cut by being reciprocated by receiving a driving force, the clipper blade comprising a plate-like base material and a plurality of blade bodies. In addition, the base material includes a main body portion from which a plurality of blades protrude, and a crank portion in which an eccentric cam that rotates by receiving the driving force is accommodated, and the crank portion includes the crank portion. A crank hole having an inner peripheral surface through which the eccentric cam slides is formed through the front and back, and the crank portion is formed along the periphery of the crank hole and rises from the surface of the base material. characterized by having

1 is a schematic configuration diagram showing the overall configuration of a clipper-type cutting blade device according to an embodiment of the present invention; 4 is a plan view showing the main parts of the operating section; FIG. 3 is a schematic cross-sectional view taken along line III-III of FIG. 2; FIG. FIG. 3 is an exploded perspective view showing a part of the main parts of the operating section; Fig. 3 is a cross-sectional view of the hair clipper blade showing an enlarged periphery of the crank portion; FIG. 4 is a plan view for explaining the operation of the clipper blade; It is the flow chart which showed the manufacturing method of the hair clipper blade. It is a schematic sectional drawing for demonstrating a burring process. It is a schematic sectional view for demonstrating shape correction processing.

(overall structure)
FIG. 1 is a diagram showing the overall configuration of a clipper-type cutting blade device according to an embodiment of the present invention. The clipper-type cutting blade device 1 is used, for example, as a device for pruning branches and leaves of trees and the like. A clipper-type cutting blade device 1 of this embodiment includes a long operating rod 2, a driving unit 3 provided at one end of the operating rod 2, an operating unit 4 provided at the other end of the operating rod 2, and an operating rod 2. An operation hand 10 provided in the middle of the rod 2 is provided.

The operation part 4 is a part that includes the hair clipper blade 30 and cuts objects such as branches and leaves. The drive unit 3 is a portion that drives the clipper blades 30, and includes a drive source 11 that drives the clipper blades 30 and a drive source case 12 that houses the drive source 11. As shown in FIG. For example, an engine is used as the drive source 11 . The operating hand 10 is a portion that is gripped by the operator, and the operator can grip the operating hand 10 to move the clipper-type cutting blade device 1 . A drive shaft 14 is arranged inside the operating rod 2 , and the output of the drive source 11 is transmitted to the operating portion 4 via the drive shaft 14 .

(Moving part)
FIG. 2 is a plan view showing the main parts of the operating section 4. As shown in FIG. As shown in FIG. 2 , the operating section 4 includes a case 21 , a cam mechanism 70 housed in the case 21 , and a cutting mechanism 22 partially housed in the case 21 . FIG. 3 is a schematic cross-sectional view taken along line III-III of FIG. FIG. 4 is an exploded perspective view showing a part of the main parts of the operating section 4. As shown in FIG.

The cam mechanism 70 has a transmission shaft 71 and a pair of eccentric cams 72 connected thereto. The transmission shaft 71 has a cylindrical shaft portion 71a and a disk-shaped head portion 71b provided at one end of the shaft portion 71a and having a larger diameter than the shaft portion 71a. The central axis of the head portion 71b and the central axis of the shaft portion 71a coincide with each other.

The two eccentric cams 72 have the same shape. The two eccentric cams 72 each have a disk shape. The two eccentric cams 72 are fixed to the transmission shaft 71 in such a manner that their central axes extend parallel to the central axis X1 of the transmission shaft 71 and are eccentric with respect to the transmission shaft 71 . Specifically, each eccentric cam 72 is formed with through-holes penetrating the front and back sides thereof, and the shaft portion 71a of the transmission shaft 71 is fixed to these through-holes.

The two eccentric cams 72 are arranged along the central axis X1 of the transmission shaft 71. A portion of each eccentric cam 72 overlaps when viewed from the direction along the central axis X1 of the transmission shaft 71, and the shaft portion 71a of the transmission shaft 71 is fixed to the overlapped portion. Also, the two eccentric cams 72 are arranged at positions facing each other with the transmission shaft 71 interposed therebetween. That is, the two eccentric cams 72 are arranged such that their central axes are separated by 180 degrees around the central axis X1 of the transmission shaft 71 . One of the two eccentric cams 72 corresponds to the "first eccentric cam" in the claims, and the other corresponds to the "second eccentric cam" in the claims.

The cutting mechanism 22 includes a pair of

clipper blades

30, 30, a first cover member 40 and a second cover member 50 as blade parts.

The first cover member 40 and the second cover member 50 are plate-like members elongated in one direction. The first cover member 40 is held by the case 21 via the connecting member 29 in a posture extending from the case 21 in a predetermined direction. The second cover member 50 is fixed to the first cover member 40 in a parallel posture. Specifically, a common bolt 91 is inserted into the through hole 41 formed in the first cover member 40 and penetrating the front and back and the through hole 51 formed in the second cover member 50 and penetrating the front and back. The second cover member 50 is fixed to the first cover member 40 by tightening the nut 92 to this. In the following description, the direction in which the first cover member 40 and the second cover member 50 are arranged is referred to as the vertical direction, and the first cover member 40 side is the upper side and the second cover member 50 side is the lower side. Further, the longitudinal direction of the first cover member 40 is referred to as the front-rear direction, the case 21 side is the rear side, and the opposite side is the front side.

The two clipper blades 30 have the same shape and structure, and in the following description of the clipper blades 30, the shape and structure of one clipper blade 30 will be described. The hair clipper blade 30 has a plate-like base material 31 elongated in one direction and a plurality of blade bodies 32 projecting around the base material 31 . In the following description of the clipper blade 30, the width direction of the base material 31 (the direction orthogonal to the longitudinal direction of the base material 31 and its front and back directions) is simply referred to as the width direction as appropriate.

A crank hole 33 in which the eccentric cam 72 is accommodated is formed at one end of the base material 31 in the longitudinal direction. The blade body 32 is provided on substantially the entire portion of the base material 31 excluding the portion where the crank hole 33 is formed. That is, the base material 31 includes a crank portion 30A in which a crank hole 33 is formed, and a main body portion 30B in which a plurality of blade bodies 32 are protruded. The base material 31 is made of one plate-like member, and the crank portion 30A and the main body portion 30B are integrally formed. Moreover, in this embodiment, the plurality of blade bodies 32 and the base material 31 are also formed integrally.

Each of the blade bodies 32 protrudes outward in the width direction from both side portions in the width direction of the body portion 30B. Each blade 32 is arranged at a constant pitch along the longitudinal direction of the base material 31 . The thickness dimension of each blade 32 (dimension in the front and back direction of the base material 31) is the same as the thickness dimension of the base material 31 (dimension in the front and back direction of the base material 31), and both sides of the blade body 32 in the thickness direction are , are continuous with both side surfaces of the substrate 31 in the thickness direction.

The blade body 32 has a substantially trapezoidal shape when viewed along its thickness direction. A rake face is formed on the peripheral portion of the blade body 32 , and the cut surface when the blade body 32 is cut along the longitudinal direction of the base material 31 has a substantially trapezoidal shape. In other words, the dimension of the surface on one side in the thickness direction of the blade body 32 in the longitudinal direction of the base material 31 is shorter than the dimension of the surface on the other side. In the following description of the hair clipper blade 30, in the thickness direction of the base material 31, the short surface side is referred to as the blade surface side, and the long surface side is referred to as the rear surface side. Further, of the two side surfaces in the thickness direction of the base material 31, the surface on the blade surface side is referred to as a cutting edge forming surface 31a, and the opposite surface is referred to as a back surface 31b. The cutting edge forming surface 31a of the base material 31 corresponds to the "surface of the base material" in the claims.

The crank portion 30A has a substantially elliptical shape extending in the width direction in plan view. The widthwise dimension of the crank portion 30A is larger than the widthwise dimension of the main body portion 30B, and the crank portion 30A is wider than the main body portion 30B. As described above, the crank hole 33 is formed in the crank portion 30A. The crank hole 33 is a through hole penetrating the front and back of the base material 31 . The crank hole 33 has a shape along the outer peripheral edge of the crank portion 30A, and has a substantially elliptical shape extending in the width direction in plan view.

The peripheral edge of the crank hole 33 protrudes toward the blade surface with respect to the edge forming surface 31a of the base material 31, and the crank portion 30A rises from the edge forming surface 31a of the base material 31 along the edge of the crank hole 33. A rising portion 34 is formed. The rising portion 34 is provided over the entire circumference of the crank hole 33 .

FIG. 5 is a cross section of the hair clipper blade 30 showing an enlarged view of the periphery of the crank portion 30A. As shown in FIG. 5 , the rising portion 34 rises substantially perpendicularly to the base material 31 , and the inner peripheral surface of the rising portion 34 , that is, the inner peripheral surface 33 a of the crank hole 33 , substantially entirely extends from the base material 31 . It extends straight almost perpendicularly to the back surface 31b of the .

The two hair clipper blades 30 configured as described above are held between the first cover member 40 and the second cover member 50 in a posture extending in the front-rear direction along these

cover members

40 and 50 . The two hair clipper blades 30 are stacked vertically between the first cover member 40 and the second cover member 50 with the rear surfaces 31b of the substrates 31 facing each other. That is, the two hair clipper blades 30 are superimposed on each other with the front and back sides reversed, and each rising portion 34 is formed along the overlapping surface of the two hair clipper blades 30 (that is, along the back surface 31b of each hair clipper blade 30). , projecting in opposite directions to each other.

Each hair clipper blade 30 is fixed to the first cover member 40 via a bolt 91 and a nut 92 so as to be movable in the front-rear direction. Specifically, elongated holes 39 elongated in the front-rear direction are formed at a plurality of positions in the front-rear direction in each base material 31 . A common bolt 91 is inserted through the elongated hole 39 and the circular hole 42 formed in the first cover member 40, and the bolt 91 is fastened with a nut 92 on the upper surface of the first cover member 40, so that each hair clipper The blade 30 is held by the first cover member 40 . Thus, the clipper blade 30 is mainly held by the first cover member 40, and the first cover member 40 corresponds to the "holding portion" in the claims.

A single eccentric cam 72 is accommodated in each crank hole 33 of each hair clipper blade 30 . In other words, the cam mechanism 70 is arranged at a position where one eccentric cam 72 is accommodated inside each crank hole 33 . In this arrangement state, the central axis X1 of the transmission shaft 71 of the cam mechanism 70 extends along the vertical direction, that is, along the front and back directions of each base material 31 . The cam mechanism 70 is arranged such that the transmission shaft 71 protrudes upward from the upper eccentric cam 72 and the head portion 71b of the transmission shaft 71 is positioned above the eccentric cam 72 . Each eccentric cam 72 is located only in one crank hole 33 and is arranged so as not to enter the other crank holes 33, and one eccentric cam 72 is a plane along the back surface 31b of each hair clipper blade 30. , and the other eccentric cam 72 is located below this plane. In this embodiment, the thickness dimension (vertical dimension) of the eccentric cam 72 and the height dimension (vertical dimension) of the rising portion 34 are set to be substantially the same. The upper surface and the upper end of the rising portion 34 of the upper hair clipper blade 30 are at the same height position, and the lower surface of the lower eccentric cam 72 and the lower end of the rising portion 34 of the lower hair clipper blade 30 are at the same height position. ing.

The driving force from the drive source 11 is transmitted to the transmission shaft 71 via the drive shaft 14, a crank mechanism (not shown) and a gear mechanism (not shown). The transmission shaft 71 receives the driving force and rotates around its axis, that is, around its central axis X1. When the transmission shaft 71 rotates, each eccentric cam 72 also rotates around the central axis X1 of the transmission shaft 71 integrally therewith. At this time, each eccentric cam 72 slides on the inner peripheral surface 33a of each crank hole 33 (the inner peripheral surface 33a of each rising portion 34), whereby each hair clipper blade 30 is driven to reciprocate in the front-rear direction. . Also, the two hair clipper blades 30 reciprocate with a phase difference of 180 degrees.

A specific explanation will be given using FIG. FIG. 6 is a plan view for explaining the operation of the clipper blade 30. FIG. FIG. 6A shows a state in which two eccentric cams 72 are arranged in the width direction of the base material 31 with the transmission shaft 71 interposed therebetween. In the state shown in FIG. 6(a), the two hair clipper blades 30 are at the same position in the front-rear direction. From this state, when the transmission shaft 71 rotates counterclockwise by 90 degrees as indicated by the arrow Y1 and the upper eccentric cam 72 moves forward, the upper eccentric cam moves forward as indicated by the arrow Y11 in FIG. 6(b). The upper clipper blade 30 is pushed forward by 72, and the upper clipper blade 30 moves forward. On the other hand, the lower eccentric cam 72 moves rearward, and the lower hair clipper blade 30 is pushed rearward as indicated by an arrow Y12. When the transmission shaft 71 further rotates counterclockwise by 90 degrees as indicated by arrow Y2 from the state shown in FIG. It moves backward, and the lower hair clipper blade 30 moves forward as indicated by an arrow Y14 in FIG. 6(c). As a result, the two hair clipper blades 30 return to the same positions in the front-rear direction. Further, when the transmission shaft 71 rotates 90 degrees counterclockwise as indicated by arrow Y3 from the state shown in FIG. 6(c), the upper clipper blade 30 moves backward as indicated by arrow Y15 in FIG. 6(d). 6(d), the lower hair clipper blade 30 moves forward as indicated by an arrow Y16 in FIG. 6(d). In this way, along with the rotation of the transmission shaft 71, the two hair clipper blades 30 reciprocate in the front-rear direction between the positions shown in FIGS. 6(b) and 6(d). Also, the two hair clipper blades 30 reciprocate in the front-rear direction with a phase difference of 180 degrees.

In the clipper-type cutting blade device 1 according to the present embodiment, the two clipper blades 30 reciprocate in the front-rear direction in this way, so that the object to be cut that has entered between the blade bodies 32 of the clipper blades 30 is cut into the blade bodies. 32.

(Manufacturing method of hair clipper blade)
Next, a method for manufacturing the hair clipper blade 30 configured as described above will be described with reference to FIGS. 7, 8 and 9. FIG. FIG. 7 is a flow chart showing the procedure of the method for manufacturing the hair clipper blade. 8 and 9 are schematic sectional views showing the periphery of the crank hole 33. FIG. FIG. 8 is a diagram for explaining burring processing, which will be described later, and FIG. 9 is a diagram for explaining a shape correction process, which will be described later.

First, the crank hole 33 is formed by drilling the prepared hole 101 in the plate material 100 that constitutes the base material 31 (S1). Specifically, as shown in FIG. 8( a ), a plate material 100 is provided with a through hole 101 penetrating through the front and back of the plate material 100 , the hole 101 being slightly smaller in diameter than the final crank hole 33 . In addition, in this embodiment, a plate-like steel material is used as the plate material 100 described above.

Next, the pilot hole 101 (crank hole 33) is burred, and the peripheral edge of the pilot hole 101 (crank hole 33) is raised from the surface 100a of the plate material 100, which serves as the cutting edge forming surface 31a. . Specifically, as shown in FIG. 8B, a mold 200 having a shape tapering upward and having a maximum diameter larger than that of the pilot hole 101 is used. Then, from the state shown in FIG. 8(a), as shown in FIG. 8(b), the mold 200 is passed through the pilot hole 101 (crank hole 33) along the direction orthogonal to the surface 100a of the plate material 100, While enlarging the diameter of the pilot hole 101 (crank hole 33), the periphery thereof is raised to form a raised portion 102 (34).

The rising portion 102 (34) is basically formed by the burring process described above. However, as shown in FIGS. 8(b) and 9(a), in the burring process, the rising portion 102 (34), which is the base end portion Z of the rising portion 102, and the flat plate portion 110 therearound are The intersecting corners Z have a curved shape, and the range in which the inner diameter is uniform in the inner peripheral surface of the rising portion 102 (34) is limited.

Therefore, in this embodiment, shape correction is performed to reduce the roundness of the corner Z and bring the angle closer to 90 degrees (S3). Specifically, the corner Z is pressed from the surface 100a side (cutting edge forming surface 31a side) of the rising portion 102 (34) (S3). In this embodiment, as shown in FIG. 9, a cylindrical mold 201 having an inner diameter substantially the same as the outer diameter of the tip of the rising portion 102 (34), the tip surface of which is An orthogonal mold 201 is used. Then, from the state shown in FIG. 9(a), as shown in FIG. 9(b), while inserting the rising portion 34 inside the mold 201, the mold 201 is placed at the corner Z and the leading end side of the rising portion 102 (34) is pressed. push toward the proximal end. As a result, the corner Z becomes less rounded, and the rising portion 102 (34) rises substantially vertically from the surface 100a of the plate member 100, that is, the surface 31a of the substrate 31. FIG. As a result, the inner diameter of the inner peripheral surface 33a of the rising portion 102 (34) becomes uniform over substantially the entire height direction. That is, as described above, substantially the entire inner peripheral surface of the rising portion 34, that is, the inner peripheral surface 33a of the crank hole 33, has a shape extending straight and substantially perpendicular to the rear surface 31b of the base material 31. As shown in FIG.

Next, the plate material 100 with the rising portion 102 (34) is formed into the hair clipper blade 30 (S4). Specifically, a portion of the plate material 100 including the crank hole 101 (33) and the rising portion 102 (34) is punched so as to match the outer shape of the hair clipper blade 30, and the blade body 32 is formed in the punched product. At the same time, the elongated holes 39 and the like are formed. Finally, the molded hair clipper blade 30 is quenched and tempered (S5).

Thus, in this embodiment, the clipper blade 30 having the rising portion 34 formed on the peripheral edge of the crank hole 33 as described above is manufactured.

(action, etc.)
As described above, in the clipper blade 30 according to the above-described embodiment, the rising portion 34 rising from the cutting edge forming surface 31a of the base material 31 is provided on the periphery of the crank hole 33 having the inner peripheral surface 33a on which the eccentric cam 72 slides. It is

Thus, according to the above embodiment, the strength around the crank hole 33 can be increased, the height of the inner peripheral surface 33a of the crank hole 33 can be increased, and the eccentric cam 72 can be prevented from coming off the crank hole 33. It is possible to prevent the peripheral portion of the crank hole 33 from being deformed. Therefore, the eccentric cam 72 can be stably slid on the inner peripheral surface 33a of the crank hole 33, and the eccentric cam 72 can be moved along an appropriate track. This achieves proper and stable forward and backward movement of the clipper blades 30 .

In particular, in the above-described embodiment, the strength and thickness of the periphery of the crank hole 33 can be increased by a simple configuration in which the portion along the periphery of the crank hole 33 of the plate-like member that constitutes the base material 31, that is, the crank portion 30A is raised. Increased. Therefore, there is no need to fix a separate reinforcing member to the crank portion 30A in order to increase the strength and thickness, and the strength and thickness around the crank hole 33 can be ensured while reducing the number of parts and cost.

Further, in the clipper-type cutting blade device 1 according to the above-described embodiment, the two clipper blades 30 are arranged so that each rising portion 34 is positioned with respect to a predetermined plane (the plane along the back surface 31b of the base material 31 of each clipper blade 30). They are held in a superimposed state in a posture projecting in mutually opposite directions.

Therefore, it is possible to prevent one of the rising portions 34 from interfering with the other clipper blade 30, and provide the two rising portions 34 of the clipper blades 30 to appropriately and stably move each of the clipper blades 30. The two hair clipper blades 30 can be appropriately reciprocated at the same time.

Further, in the above-described embodiment, by burring the pilot hole 101 (the pilot hole 101 that becomes the crank hole 33) formed in the plate member 100 that constitutes the base material 31, the peripheral edge of the pilot hole 101 (the crank hole 33) rises. Since the portion 102 (34) is formed, the rising portion 102 (34) can be formed with a small number of man-hours. For example, as a method of providing the rising portion 34 on the periphery of the crank hole 33, the crank hole 33 is formed in the base material 31, and a tubular member having the same inner diameter as the crank hole 33 is formed from a member different from the base material 31. There is also a method of fixing this tubular member to the periphery of the crank hole 33 by welding or the like, but this method requires a step of separately forming a tubular member and a step of fixing it to the periphery of the crank hole 33. The number of man-hours increases. In contrast, according to the above-described embodiment, it is only necessary to perform burring processing on the plate material 100 forming the base material 31, and the rising portion 34 can be provided on the peripheral edge of the crank hole 33 with a small number of man-hours.

Furthermore, in the above-described embodiment, the peripheral edge of the prepared hole 101 (crank hole 33) raised from the surface 100a of the plate material 100 by burring, that is, the raised portion 34 after burring and the flat plate portion 110 around it intersect. The roundness of the corner Z is reduced by pressing the corner Z from the cutting edge forming surface 31a (that is, pressing the rising portion 34 from the tip side to the base end side). Therefore, as described above, substantially the entire inner peripheral surface of the rising portion 102 (34), that is, the inner peripheral surface 33a of the crank hole 33, can be formed in a shape extending straight and substantially perpendicular to the back surface 31b of the base material 31. can. Therefore, the inner peripheral surface 33a of the crank hole 33 and the eccentric cam 72 can be stably slidably contacted, and the hair clipper blade 30 can be reciprocated more appropriately and stably.

(Modification)
In the above-described embodiment, as a method for manufacturing the clipper blade 30, after forming the rising portion 102 by burring the prepared hole 101 (crank hole 33), the corner where the rising portion 102 intersects with the surrounding flat plate portion 110 is formed. Although the case where the shape correction is performed to reduce the roundness of the portion Z has been described, the shape correction step may be omitted. However, if the above shape correction is performed, the inner peripheral surface 33a of the crank hole 33 and the eccentric cam 72 can be brought into sliding contact more reliably and stably as described above.

In the above-described embodiment, the hair clipper blade 30 is a double-edged type hair clipper blade in which the blade bodies 32 are provided on both sides in the width direction of the base material 31 . It is also applicable to a single-edged type hair clipper blade in which the blade body 32 is provided only on one side in the width direction.

Further, in the above embodiment, the case where the base material 31 of the hair clipper blade 30 has an elongated plate shape has been described, but the configuration of the present invention can be applied to a hair clipper having a base material having another shape such as a semicircular shape. It is also applicable to blades.

Further, in the above embodiment, the clipper blade 30 reciprocates along the longitudinal direction of the base material 31 (the front-rear direction in the above embodiment). 31 may be used in a reciprocating motion in a direction perpendicular to the longitudinal direction of 31 .

Further, in the above embodiment, the clipper-type cutting blade device 1 has two clipper blades 30 that reciprocate with a phase difference of 180 degrees from each other. The device to which is applied is not limited to this, and can also be applied to a device provided with only one hair clipper blade 30 .

It is as follows when the said embodiment is put together.
The clipper blade of the embodiment is a clipper blade that cuts an object to be cut by being reciprocated by receiving a driving force, and includes a plate-shaped base material and a plurality of blade bodies, the base material being and a crank portion in which an eccentric cam that rotates by receiving the driving force is accommodated. A crank hole having an inner peripheral surface on which the eccentric cam slides is formed, and the crank portion has a rising portion formed along the periphery of the crank hole and rising from the surface of the base material.

According to this clipper blade, the rising portion formed along the periphery of the crank hole increases the strength of the periphery of the crank hole and increases the height of the periphery. That is, according to the clipper blade of the above-described embodiment, it is possible to increase the strength and thickness of the periphery of the crank hole with a simple configuration in which the portion of the base material constituting the crank portion along the periphery of the crank hole is raised. can. Therefore, it is possible to omit the fixing of a reinforcing member for increasing the strength and thickness, and it is possible to secure the strength and thickness around the crank hole while keeping the number of parts and the cost small.

Further, the clipper-type cutting blade device of the above embodiment includes two clipper blades configured as described above, a transmission shaft that rotates about an axis extending in a direction orthogonal to the surface of the base material, and the transmission shaft. A first eccentric cam fixed rotatably and eccentrically to the shaft and accommodated in the crank hole of one of the hair clipper blades; and a first eccentric cam fixed to the transmission shaft rotatably and eccentrically. a second eccentric cam disposed at a position facing the first eccentric cam with the transmission shaft interposed therebetween and accommodated in the crank hole of the other hair clipper blade; and a driving portion for rotationally driving the transmission shaft. and a holding portion for holding the two hair clipper blades in a superimposed state in such a manner that each of the rising portions protrudes in opposite directions to a predetermined plane.

According to this device, it is possible to provide a clipper-type cutting blade device that secures strength and thickness around the crank hole while keeping the number of parts and cost small. In addition, since the two clipper blades are superimposed in such a manner that each of the raised portions protrudes in opposite directions, it is possible to avoid interference of one of the clipper blades with the other clipper blade. These clipper blades can be appropriately reciprocated while providing

Further, the method for manufacturing the clipper blade of the above embodiment includes the steps of forming the crank hole in a plate material, burring the crank hole, and raising the peripheral edge of the crank hole from the surface of the plate material to form the rising portion. and forming.

With this method, a raised portion can be formed on the periphery of the crank hole by a simple method of forming the crank hole in the plate material and then burring the crank hole. As a result, the number of man-hours for manufacturing can be reduced compared to the conventional case of separately manufacturing a reinforcing member and fixing the reinforcing member around the crank hole while ensuring the strength and thickness around the crank hole.

The method preferably further includes the step of pressing a corner portion of the plate where the rising portion intersects with the surrounding flat plate portion from the surface side of the plate member to reduce the roundness of the corner portion. .

According to this method, the roundness of the corners of the plate material where the rising portion and the surrounding flat plate portion intersect is kept small, so that the angle between the rising portion and the surrounding flat plate portion, that is, the rising portion and the plate material. The angle with the surface of the substrate to be processed can be made closer to vertical. Therefore, the inner peripheral surface of the rising portion, that is, the inner peripheral surface of the crank hole and the eccentric cam can be stably brought into sliding contact with each other, and the clipper blade can be reciprocated more appropriately.

Claims

A hair clipper blade that cuts an object to be cut by being reciprocated by receiving a driving force,
Equipped with a plate-shaped base material and a plurality of blades,
The base material includes a main body portion from which a plurality of blades protrude, and a crank portion that accommodates an eccentric cam that rotates by receiving the driving force,
The crank portion is formed with a crank hole having an inner peripheral surface through which the eccentric cam slides through the front and back of the crank portion,
A hair clipper blade, wherein the crank portion has a rising portion formed along the periphery of the crank hole and rising from the surface of the base material.
A clipper-type cutting blade device comprising two clipper blades according to claim 1,
a transmission shaft rotating around an axis extending in a direction orthogonal to the surface of the base;
a first eccentric cam fixed rotatably and eccentrically to the transmission shaft and accommodated in the crank hole of one of the hair clipper blades;
It is fixed rotatably and eccentrically to the transmission shaft, is disposed at a position facing the first eccentric cam across the transmission shaft, and is received in the crank hole of the other hair clipper blade. a second eccentric cam that
a drive unit that rotationally drives the transmission shaft;
A clipper-type cutting blade device comprising: a holding portion that holds the two clipper blades in a state in which the raised portions project in opposite directions from each other with respect to a predetermined plane. .
A method for manufacturing the clipper blade according to claim 1,
forming the crank hole in the plate;
A method of manufacturing a hair clipper blade, comprising: burring the crank hole, and raising the peripheral edge of the crank hole from the surface of the plate to form the raised portion.
In the method for manufacturing the hair clipper blade according to claim 3,
A hair clipper further comprising a step of pressing a corner portion of the plate material where the rising portion and the surrounding flat plate portion intersect from the surface side of the plate member to reduce the roundness of the corner portion. Blade manufacturing method.