JP5879179B2 - Cutting device - Google Patents

Description

  The present invention relates to a cutting device including a cutting blade and a cleaning device for the cutting device. The cutting device of the present invention is a concept including an electric razor and a clipper, and a photocatalytic film is provided on the surface of the cutting blade.

  As in the present invention, it is known in Patent Documents 1 to 3 to provide a photocatalyst film on the surface of the cutting blade. For example, in Patent Document 1, in an electric shaver provided with an ultraviolet irradiation lamp inside a fuzz chamber. The photocatalytic film is provided on at least one of the outer blade surface, the inner blade surface, and the inner peripheral surface of the fluff chamber, and the interior of the fluff chamber is sanitized by the organic matter decomposition action and antibacterial action of the photocatalyst film. It is kept in a proper state.

JP 2004-105327 A (Claim 7) JP-A-11-216276 (paragraph numbers 0038-0042) JP 2000-94564 A (paragraph numbers 0044-0046)

  A cutting device such as this type of electric shaver is essentially required to have a good cutting ability for cutting a whisker or the like, and this ability largely depends on the cutting ability of the cutting edge of the inner blade or the outer blade. However, when the photocatalytic film is formed so as to cover the blade edge, it is inevitable that the cutting ability of the blade edge is greatly reduced. For this reason, in order to obtain a good organic substance decomposition action and antibacterial action of the photocatalyst film without impairing the cutting ability, it is not sufficient to simply form the photocatalyst film on the cutting edge as in Patent Document 1, etc. It is necessary to strictly define the location where the photocatalytic film is formed.

  The objective of this invention is providing the cutting device which exhibits the favorable organic-material decomposition | disassembly effect | action and antimicrobial effect which originate in a photocatalyst film | membrane, without reducing the cutting capability of a cutting blade. Another object of the present invention is to provide a cleaning device that can exhibit an organic substance decomposing action and an antibacterial action derived from a photocatalyst film more efficiently and is excellent in a washing function.

  The present invention is directed to a cutting device including a cutting blade 11. The small blade 31 provided on the cutting blade 11 has a blade edge 54 provided at the protruding end of the outer surface 50, and a scooping surface 52 formed in an inner recess shape on the side surface of the small blade 31 continuously to the blade edge 54. . A photocatalytic film 75 is formed on at least the surface of the scooping surface 52 of the small blade 31. And the thickness dimension of the photocatalyst film | membrane 75 formed in the scooping surface 52 shall become thick gradually as it leaves | separates from the blade edge | tip 54, It is characterized by the above-mentioned.

  The scooping surface 52 can take the form in which the side surface of the small blade 31 is formed in an indented curved shape continuously to the cutting edge 54.

  A form in which the surface curvature (R2) of the photocatalytic film 75 is set smaller than the surface curvature (R1) of the scooping surface 52 can be adopted.

  The small blade 31 includes an outer surface 50 having a cutting edge 54 and an inner surface 51 facing the outer surface 50 with the scooping surface 52 interposed therebetween. At least in addition to the surface of the scooping surface 52, the photocatalytic film 75 is formed on the surface of the inner surface 51. The form in which is formed can be taken.

  The thickness dimension (D3) of the photocatalyst film | membrane 75 formed in the inner surface 51 can take the form set larger than the thickness dimension (D1) of the photocatalyst film | membrane 75 formed in the scooping surface 52.

  On the side surface of the small blade 31 opposite to the scooping surface 52, a scooping surface 53 is formed in an indented shape, and a photocatalytic film 75 is also formed on the surface of the scooping surface 53. The maximum thickness dimension (D2) of the photocatalyst film 75 can be set larger than the maximum thickness dimension (D1) of the photocatalyst film 75 formed on the scooping surface 52.

  The photocatalyst film 75 formed on the surface of the scooping surface 52 is formed in an indented shape, and the photocatalyst film 75 formed on the surface of the scooping surface 53 is formed in an outwardly convex shape.

  On the surface of the scooping surface 52, a minute uneven portion 82 is formed by etching, and a photocatalytic film 75 is formed on the surface of the scooping surface 52 so as to bite into the minute uneven portion 82. . Note that the minute uneven portion 82 is an unevenness on the order of μm, and is formed by an etching process when forming the blade 31 or a chemical process using an acidic solution prior to the formation of the photocatalyst film 75.

  A recess 81 a is formed on the outer surface 50 of the small blade 31 including the blade edge 54, and a photocatalytic film 75 can be formed on the surface of the outer surface 50 so as to bite into the recess 81 a.

  The recess 81a can be formed by half etching.

  The cutting blade 11 and the recess 81a can be formed by electroforming.

  A recess 81b is formed in the inner surface 51, and a form in which a photocatalytic film 75 is formed on the surface of the inner surface 51 so as to bite into the recess 81b can be adopted. The recess 81b can be formed by half etching.

  A cutting device provided with a cutting blade 11, wherein a small blade 31 provided on the cutting blade 11 is internally recessed on a side surface of the small blade 31 continuously to the blade edge 54 provided at the protruding end of the outer surface 50 and the blade edge 54. And the small blade 31 applies the liquid photocatalyst 71 to at least the scooping surface 52 side, and then feeds air toward the cutting edge 54, so that the thickness dimension is reduced. It is possible to form the photocatalyst film 75 on the scooping surface 52 that gradually increases as the distance from the surface 54 increases.

  A cutting device provided with a cutting blade 11, wherein a small blade 31 provided on the cutting blade 11 is internally recessed on a side surface of the small blade 31 continuously to the blade edge 54 provided at the protruding end of the outer surface 50 and the blade edge 54. After the small blade 31 has applied the liquid photocatalyst 71 to at least the scooping surface 52 side, the excess photocatalyst 71 is removed by centrifugal force, and further toward the cutting edge 54. By supplying the wind, the photocatalytic film 75 whose thickness dimension gradually increases as the distance from the blade edge 54 increases can be formed on the scooping surface 52.

  It is a cutting device provided with the cutting blade 11, Comprising: The small blade 31 provided in the cutting blade 11 is indented on the side surface of a cutting blade continuously with the blade edge 54 provided in the protrusion end of the outer surface 50, and the blade edge 54. The small blade 31 applies the liquid photocatalyst 71 to at least the scooping surface 52 side, and then removes the excess photocatalyst 71 by centrifugal force. It is possible to form the photocatalyst film 75 that gradually increases in thickness on the scooping surface 52 as the distance from the surface increases.

  The present invention is a cutting device that includes a mesh-like fixed outer blade 10 and an inner blade 11 that performs a cutting operation in cooperation with the fixed outer blade 10, and the small blade 31 provided on the inner blade 11 includes A cutting edge 140 provided on the fixed outer blade 10 having a cutting edge 54 provided at the protruding end of the outer surface 50 and a scooping surface 52 formed in an inner recess shape on the side surface of the small blade 31 continuously to the cutting edge 54. Has a scissors surface 144 and a scooping surface 143 formed in an indented shape on the side surface continuously to the scissors 144, and photocatalytic films 75 and 75 are formed on at least the scooping surfaces 52 and 143 of the small blades 31 and 140. The photocatalytic film 75 formed on both scooping surfaces 52 and 143 has a thickness dimension that gradually increases as the distance from the blade edges 54 and 144 increases.

  The scooping surface 52 of the small blade 31 of the inner blade 11 is formed in a curved shape of an inner recess on the side surface of the small blade 31 continuously to the cutting edge 54, and the scooping surface 143 of the small blade 140 of the fixed outer blade 10 is formed. Further, it is possible to adopt a form in which the side surface of the small blade 140 is formed in an indented curved shape continuously with the blade edge 144.

  The surface curvature (R2) of the photocatalytic film 75 formed on the small blade 31 of the inner blade 11 is set to be smaller than the surface curvature (R1) of the scooping surface 52, and is formed on the small blade 140 of the fixed outer blade 10. It is possible to adopt a form in which the surface curvature (R6) of the photocatalyst film 75 is set smaller than the surface curvature (R5) of the scooping surface 143.

  A cleaning device for performing a cleaning process on a cutting device provided with a cutting blade 11 in the head unit 2 is an object. The cleaning device includes a drying unit 165 that performs a drying process on the head unit 2 that has been washed with water, and an ultraviolet irradiation unit 166 that irradiates the head unit 2 with ultraviolet rays. The small blade 31 provided on the cutting edge 11 has a blade edge 54 provided at the tip of the inner and outer surfaces thereof, and a scooping surface 52 formed in an inner recess shape on the side surface of the small blade 31 continuously to the blade edge 54. The photocatalyst film 75 is formed on at least the surface of the scooping surface 52 of the small blade 31, and the thickness dimension of the photocatalyst film 75 formed on the scooping surface 52 gradually increases as the distance from the blade edge 54 increases. is there. The ultraviolet irradiating unit 166 is configured to irradiate the head unit 2 with ultraviolet light during the drying process by the drying unit 165 after the head unit 2 is washed with water.

  It is assumed that the drying unit 165 includes a heater 171 that heats the head unit 2. Then, the heater 171 and the ultraviolet irradiation means 166 are arranged opposite to the head unit 2 of the cutting device.

  In the present invention, since the photocatalytic film 75 is formed on the surface of the scooping surface 51 of the small blade 31 of the cutting edge 11, the inside of the cutting apparatus is maintained in a sanitary state by the organic matter decomposing action and antibacterial action of the photocatalytic film 75. can do. In addition, since the thickness dimension of the photocatalytic film 75 formed on the surface of the scooping surface 52 is thin on the blade edge 54 side and gradually increases as the distance from the blade edge 54 increases, the photocatalytic film 75 adheres to the blade edge 54. This can prevent the cutting ability of the cutting blade 11 from being lowered. From the above, it is possible to obtain a cutting device having a good organic matter decomposing action and antibacterial action of the photocatalytic film 75 without impairing the cutting ability (sharpness) of the cutting edge 11.

  When the scooping surface 52 is formed in an indented curved shape on the side surface of the small blade 31 continuously to the cutting edge 54, the contact area between the photocatalytic film 75 and the scooping surface 52 is increased, and the photocatalytic film 75 is formed from the scooping surface 52. It can be surely prevented from falling off.

  If the surface curvature (R2) of the photocatalytic film 75 is set smaller than the surface curvature (R1) of the scooping surface 52, the size of the inner recess of the photocatalytic film 75 can be reduced. As a result, it is possible to effectively prevent dirt such as debris from accumulating in the indented portion of the photocatalytic film 75.

If the photocatalyst film 75 is formed on the surface of the inner surface 51 in addition to the surface of the scooping surface 52, the portion of the inner surface 51 that is difficult to clean of the blade 31 can be covered with the photocatalyst film 75. The inside can be kept in a more hygienic state.
In particular, if the thickness dimension (D3) of the photocatalyst film 75 formed on the surface of the inner surface 51 is larger than the maximum thickness dimension (D1) of the photocatalyst film 75 formed on the surface of the scooping surface 52, the inner surface 51 The organic substance decomposing action and antibacterial action derived from the photocatalytic film 75 on the side can be obtained over a longer period.

  If the photocatalyst film 75 formed on the surface of the scooping surface 52 is formed in an indented shape, the contact area between the photocatalyst film 75 and the scooping surface 52 is increased, and the photocatalyst film 75 falls off from the scooping surface 52. Can be surely prevented. In addition, when the photocatalyst film 75 formed on the surface of the ridged surface 53 is formed in an outer convex shape, the maximum thickness dimension of the photocatalyst film 75 on the ridged surface 53 side can be increased, and therefore, for a longer period of time. Thus, the organic substance decomposing action and antibacterial action derived from the photocatalytic film 75 can be obtained.

  On the surface of the scooping surface 52, a minute uneven portion 82 is formed by etching. When the photocatalytic film 75 is formed on the surface of the scooping surface 52 so as to bite into the minute concave and convex portion 82, Since the contact area between the photocatalyst film 75 and the scooping surface 52 can be increased by increasing the surface area, it is possible to effectively prevent the photocatalyst film 75 from falling off from the scooping surface 52. Thereby, the organic substance decomposing action and antibacterial action derived from the photocatalytic film 75 can be obtained over a longer period of time. Here, “etching” is a concept that includes a chemical process performed prior to the formation process of the photocatalyst film 75 in addition to an etching process for forming the blade 31. However, the fine irregularities 82 may be formed by an etching process for forming these blades 31 or an etching process different from the chemical process.

  When the concave portion 81a is formed on the outer surface 50 of the small blade 31 including the blade edge 54 and the photocatalytic film 75 is formed on the surface of the outer surface 50 so as to bite into the concave portion 81a, the surface area of the outer surface 50 is increased, and the photocatalytic film 75 is formed. Since the contact area between the outer surface 50 and the outer surface 50 can be increased, it is possible to effectively prevent the photocatalytic film 75 from falling off the outer surface 50. Thereby, the organic substance decomposing action and antibacterial action derived from the photocatalytic film 75 can be obtained over a longer period of time. The recess 81a of the outer surface 50 is preferably formed by half-etching or by electroforming with the cutting blade 11, so that the cutting blade 11 having the recess 81a on the outer surface 50 can be obtained at a lower cost.

  Similarly, when the concave portion 81b is formed in the inner surface 51 and the photocatalytic film 75 is formed on the surface of the inner surface 51 so as to bite into the concave portion 81b, the surface area of the inner surface 51 is increased, and the photocatalytic film 75 and the inner surface 51 are separated. Since the contact area can be increased, the photocatalytic film 75 can be effectively prevented from falling off from the inner surface 50. Thereby, the organic substance decomposing action and antibacterial action derived from the photocatalytic film 75 can be obtained over a longer period of time. The recess 81b is preferably formed by half etching, whereby the cutting edge 11 having the recess 81b on the inner surface 51 can be obtained at a lower cost.

  The photocatalyst film 75 having a form in which the thickness dimension gradually increases as the distance from the blade edge 54 is increased as described above, after the liquid photocatalyst 71 is applied to the scooping surface 52 side, and then air is fed toward the blade edge 54. In addition, after the liquid photocatalyst 71 is applied to the scooping surface 52 side, the excess photocatalyst 71 is removed by centrifugal force, and further air is fed toward the cutting edge 54, or the liquid photocatalyst is applied to the scooping surface 52 side. After applying 71, it can be formed by removing excess photocatalyst 71 by centrifugal force. Moreover, the photocatalyst layer 75 having a predetermined shape can be obtained at a lower cost by adopting any one of the above production methods.

  In the present invention, the photocatalyst film 75 is formed on the surface of the scooping surface 52 of the small blade 31 of the inner blade 11 and the photocatalyst film 75 is formed on the surface of the scooping surface 143 of the small blade 140 of the fixed outer blade 10. Therefore, the inside of the cutting device can be maintained in a sanitary state by the organic matter decomposing action and antibacterial action of the photocatalytic film 75. In addition, the thickness of the photocatalyst film 75 formed on the surfaces of the scooping surfaces 52 and 143 is such that the blade edges 54 and 144 are thin, and the thickness gradually increases as the distance from the blade edges 54 and 144 increases. It is possible to prevent the cutting ability of the fixed outer blade 10 and the inner blade 11 from being deteriorated due to adhering to the blade edges 54 and 144. From the above, it is possible to obtain a cutting device having a good organic matter decomposing action and antibacterial action of the photocatalytic film 75 without impairing the cutting ability (sharpness) of the fixed outer blade 10 and the inner blade 11.

  When the scooping surface 52 of the small blade 31 of the inner blade 11 is formed in an indented curved shape on the side surface of the small blade 31 continuously to the cutting edge 54, the contact area between the photocatalytic film 75 and the scooping surface 52 is increased, It is possible to reliably prevent the photocatalytic film 75 from dropping from the scooping surface 52. Similarly, when the scooping surface 143 of the small blade 140 of the fixed outer blade 10 is formed in an indented curved shape on the side surface of the small blade 140 continuously to the blade edge 144, the contact area between the photocatalytic film 75 and the scooping surface 143 is increased. By enlarging, it is possible to reliably prevent the photocatalytic film 75 from dropping from the scooping surface 143.

  If the surface curvature (R2) of the photocatalyst film 75 in the inner blade 11 is set smaller than the surface curvature (R1) of the scooping surface 52, the size of the inner recess of the photocatalyst film 75 can be reduced. It is possible to effectively prevent dirt such as fouling from accumulating in the indented portion of the film 75. Similarly, if the surface curvature (R6) of the photocatalyst film 75 in the fixed outer blade 10 is set smaller than the surface curvature (R5) of the scooping surface 143, the size of the inner dent of the photocatalyst film 75 can be reduced. It is possible to effectively prevent dirt such as fouling from accumulating in the inner recess portion of the photocatalyst film 75 in the outer blade 10.

  In the cleaning device for performing the cleaning process on the cutting device having the cutting edge 11 in the head unit 2, the photocatalyst 71 is irradiated with ultraviolet light while performing the drying process by the drying means 165, and the photocatalyst layer. The photocatalyst 71 that constitutes 75 can be excited. According to this, the organic substance decomposing action and the antibacterial action derived from the photocatalyst film 75 can be obtained better than in the form of irradiating with ultraviolet light before the drying treatment, so that the cleaning device has a more excellent cleaning function. Can be obtained.

  The drying means 165 may include a heater 171 that heats the head unit 2, and the heater 171 and the ultraviolet irradiation unit 166 may be arranged to face the head unit 2 of the cutting device. According to this, since heating and irradiation of ultraviolet light can be performed from a position closer to the head unit 2, the heat drying process for the head unit 2 can be executed more efficiently. Moreover, since the head part 2 can be more efficiently irradiated with ultraviolet light, it is expected to improve the organic substance decomposition action and antibacterial action derived from the photocatalyst film 75.

It is a vertical side view of the small blade of an inner blade (cut blade) in 1st Example which applied the cutting device concerning this invention to the electric shaver. It is a front view of the electric razor which concerns on 1st Example. It is the sectional view on the AA line of FIG. It is a vertical side view which shows the manufacturing method of the inner blade which concerns on 1st Example. It is a top view which shows the manufacturing method of the inner blade which concerns on 1st Example. (A), (b) is a figure for demonstrating the manufacturing method of the inner blade which concerns on 1st Example. It is a figure for demonstrating the manufacturing method of the inner blade which concerns on 1st Example. (A)-(c) is a figure for demonstrating the manufacturing method of the inner blade which concerns on 1st Example, and is a figure which shows the example of formation of a crimping protrusion. It is a figure for demonstrating the manufacturing method of the inner blade which concerns on 1st Example, and is sectional drawing which shows the press fitting form with respect to a disc and a shaft main body. It is a figure for demonstrating the manufacturing method of the inner blade which concerns on 1st Example. It is a front view of the inner blade which concerns on 1st Example. It is a figure for demonstrating the manufacturing method of the inner blade which concerns on 1st Example. (A)-(d) is a figure for demonstrating the manufacturing method of the inner blade which concerns on 1st Example, and is a figure for demonstrating the formation procedure of the base layer with respect to an inner blade. (A)-(d) is a figure for demonstrating the manufacturing method of the inner blade which concerns on 1st Example, and is a figure for demonstrating the formation procedure of the photocatalyst layer with respect to an inner blade. It is a vertical side view of the principal part of the electric shaver which concerns on 2nd Example. It is a vertical side view of the principal part of the electric shaver which concerns on 3rd Example. It is a vertical side view of the principal part of the electric shaver which concerns on 4th Example. It is a vertical side view of the principal part of the electric shaver which concerns on 5th Example. (A)-(c) is a figure which shows the manufacturing method of the inner blade of the electric razor which concerns on 5th Example. It is a figure which shows the manufacturing method of the inner blade of the electric razor which concerns on 6th Example. It is a vertical side view of the principal part of the electric shaver which concerns on 7th Example. It is a vertical side view of the principal part of the electric shaver which concerns on 8th Example. It is a vertical side view of the inner blade of the electric razor which concerns on 9th Example. It is a vertical side view of the small blade of the inner blade (cut blade) in the electric shaver which concerns on 10th Example. It is a front view of the principal part of the electric shaver which concerns on 10th Example. It is the BB sectional view taken on the line of FIG. It is a front view of an inner blade. It is a figure for demonstrating the manufacturing method of the inner blade which concerns on 10th Example. It is a figure for demonstrating the manufacturing method of the inner blade which concerns on 10th Example. It is a figure for demonstrating the manufacturing method of the inner blade which concerns on 10th Example. (A)-(d) is a figure for demonstrating the manufacturing method of the inner blade which concerns on 10th Example, and is a figure for demonstrating the formation procedure of the base layer with respect to an inner blade. (A)-(c) is a figure for demonstrating the manufacturing method of the inner blade which concerns on 10th Example, and is a figure for demonstrating the formation procedure of the photocatalyst layer with respect to an inner blade. It is a figure which shows the manufacturing method of the inner blade of the electric razor which concerns on 11th Example. It is a figure which shows the manufacturing method of the inner blade of the electric razor which concerns on 12th Example. It is a front view of the principal part of the electric shaver which concerns on 13th Example. It is a figure which shows the manufacturing method of the inner blade of the electric razor which concerns on 13th Example. It is a figure which shows the manufacturing method of the inner blade of the electric razor which concerns on 13th Example. It is a figure which shows the manufacturing method of the inner blade of the electric razor which concerns on 13th Example. (A)-(d) is a figure for demonstrating the manufacturing method of the inner blade which concerns on 13th Example, and is a figure for demonstrating the formation procedure of the base layer with respect to an inner blade. (A)-(c) is a figure for demonstrating the manufacturing method of the inner blade which concerns on 13th Example, and is a figure for demonstrating the formation procedure of the photocatalyst layer with respect to an inner blade. It is a vertical front view of the principal part of the electric razor which concerns on 14th Example. It is a figure which shows the manufacturing method of the outer blade of the electric razor which concerns on 14th Example. It is a figure which shows the manufacturing method of the outer blade of the electric razor which concerns on 14th Example. (A)-(d) is a figure for demonstrating the manufacturing method of the outer blade which concerns on 14th Example, and is a figure for demonstrating the formation procedure of the base layer with respect to an outer blade. (A)-(d) is a figure for demonstrating the manufacturing method of the outer blade which concerns on 14th Example, and is a figure for demonstrating the formation procedure of the photocatalyst layer with respect to an outer blade. It is a schematic block diagram of the cleaning apparatus based on 15th Example of this invention. It is a front view of the principal part of the electric shaver which concerns on 16th Example of this invention. It is a vertical front view of the principal part in the 17th Example which applied the cutting device concerning this invention to the clipper. It is a front view of the principal part of the clipper which concerns on 17th Example of this invention. It is a front view of the movable blade of the clipper which concerns on 17th Example of this invention.

(First embodiment)
1 to 14 show a first embodiment in which a cutting apparatus according to the present invention is applied to a rotary electric shaver. As shown in FIG. 2, the electric razor is disposed on the main body 1, the head 2 supported by the main body 1, the outer frame 3 attached to the main body 1, and the rear surface side of the main body 1. Consists of a shaving unit not shown. The outer frame 3 is provided in order to improve the decorativeness of the electric razor, and constitutes a grip in cooperation with the main body 1. A switch button 5 for turning on / off the energization state of the motor 4 is provided on one side upper part of the outer frame 3. In addition to the motor 4, a secondary battery 6, a circuit board 7, and the like are assembled inside the main body 1. In addition to the switch that can be switched by the previous switch button 5, an LED for the indicator lamp 8, a control circuit, a power circuit, and the like are mounted on the circuit board 7.

  The head portion 2 is provided with a main blade including an outer blade 10 and an inner blade (cutting blade) 11, and further, a motor 4 that rotationally drives the inner blade 11, and the rotational power of the motor 4 is a rotating blade. A drive structure for transmitting to the blade 11 is provided. The motor 4 is fixed to the lower surface of the head frame 14 and is accommodated in the upper inner surface of the main body 1. The drive structure is composed of a group of gear trains 9, and the rotational power around the vertical axis of the motor 4 is converted into rotational power around the horizontal axis and transmitted to the inner blade 11. The inner blade 11 is rotationally driven in the direction of the arrow shown in FIG. 3 (counterclockwise direction). The outer blade 10 is composed of a sheet-like mesh blade formed by an etching method or an electroforming method, and the front and rear edges thereof are supported by the outer blade holder 12 and held in an inverted U shape. FIG. 3 shows an outer blade 10 formed by electroforming. Reference numeral 13 denotes a cutting edge of the outer blade 10. The head portion 2 is supported by the main body portion 1 so as to be movable up and down, and the space between the two is sealed with a waterproof packing.

  The outer blade holder 12 is detachably attached to the head frame 14, and is locked and held in a non-separable manner by a lock structure not shown. When the pair of left and right lock release buttons 15 and 15 provided on the head frame 14 are pushed in at the same time, the lock structure is unlocked, and the outer blade holder 12 can be removed from the head frame 14 to expose the inner blade 11. . In this state, the hair adhering to the upper surface of the head frame 14 and the inner blade 11 can be washed with water.

  As shown in FIGS. 3, 10, and 11, the inner blade 11 includes a rotating shaft body 20 and a cutting blade 21 that is fixed to the rotating shaft body 20. As shown in FIG. 7, the rotating shaft body 20 includes a shaft main body 22 and five disks 23 that are press-fitted and fixed to the shaft main body 22. The shaft body 22 is formed into a round shaft by turning a martensitic stainless steel material, and the disk 23 is formed into a disk shape by turning the austenitic stainless steel material.

  In order to press-fit (clamp and fix) the disk 23 to the shaft body 22, a plurality of caulking protrusions 24 are formed around the shaft body 22 corresponding to the fixing positions of the disks 23. The caulking protrusions 24 are formed by staking the periphery of the shaft body 22. In this embodiment, rib-shaped caulking protrusions 24 are formed at four positions in the circumferential direction for each fixing position of each disk 23. (See FIG. 8 (c)). As shown in FIG. 9, the caulking protrusions 24 are formed in an intermittent state at five positions in the central axis direction of the shaft body 22, and the length of the caulking protrusions 24 in the central axis direction is the thickness dimension of the disk 23. 2.5 times. Details of the staking process will be described later.

  A loading hole 25 inserted through the shaft body 22 is formed in the center of the disk-shaped disk 23, and a relief groove corresponding to the caulking protrusion 24 is formed on the inner surface of the loading hole 25. A circular blade receiving surface 26 is formed on the peripheral surface of the disk 23, and the cutting blade 21 is welded to the peripheral surface of the blade receiving surface 26.

  The cutting blade 21 is formed into a cylindrical shape by subjecting a martensitic stainless steel plate to etching and further rolling (plastic processing). Details of the processing will be described later. As shown in FIG. 5, the etched sheet-like blank 27 includes a group of first blades (small blades) 31a, a group of second blades (small blades) 31b, and both blades 31a. A group of rhombus blade holes 33 surrounded by 31b and a peripheral frame 34 surrounding these are formed. A group of both small blades 31 (31a and 31b) is formed so as to be inclined in directions opposite to each other with respect to the central axis of the rotating shaft body 20, whereby the unfolded sheet blank 27 is entirely expanded. It has a metal appearance.

  As described above, when the sheet-like blank 27 is formed in an expanded metal shape, the total length of the cutting blade can be increased as compared with the conventional rotary blade having a spiral blade as a cutting element, and the two small blades having different inclination directions are used. By 31 (31a, 31b), the cutting object can be cut alternately. Furthermore, since the opening area of the blade hole 33 is remarkably large, the cutting object can be effectively introduced into the blade hole 33 and can be cut efficiently, similarly to the inner blade having a spiral blade as a cutting element.

  Next, the detail of the manufacturing method of the inner blade 11 is demonstrated. The manufacturing process of the inner blade 11 that is a rotary blade includes a step of forming the rotary shaft body 20, a step of forming the cutting blade 21 and fixing it to the rotary shaft body 20, and a step of forming the photocatalytic film 75 on the cutting blade 21. Can be broadly divided. The step of forming the rotating shaft body 20 includes a step of forming a caulking projection 24 around the shaft body 22, a step of forming a loading hole 25 in the disk 23, and a press-fit posture by inserting the disk 23 into the shaft body 22. And the step of relatively fitting the disk 23 and the shaft main body 22 to press-fit the caulking protrusion 24.

  As shown in FIG. 4, the step of forming the cutting blade 21 includes etching the stainless steel plate material to form the sheet-like blank 27, and roll processing (plastic working) on the sheet-like blank 27 as shown in FIG. ) To form a cylindrical cutting blade blank 28. After that, a rotary blade blank 29 is formed through a process of welding the cutting blade blank 28 to the rotary shaft body 20, and the rotary blade blank 29 is subjected to quenching and grinding processing to complete the inner blade 11 which is a rotary blade. To do. The cutting blade blank 28 may be formed by punching a stainless steel plate material.

(Process for forming loading holes)
In this step, a stainless steel round shaft is cut to form a turning blank having a predetermined diameter value, and the loading hole 25 is formed by turning or drilling the center of the obtained turning blank. The obtained long blank is cut into a predetermined width with a cutting tool to form a disk 23. The disk 23 can be formed by punching a stainless steel plate or can be formed by etching a stainless steel plate.

(Process for forming caulking protrusions)
As shown in FIG. 8, in the step of forming the caulking projection 24, the stationary staking process fixed mold 35 and the staking process movable mold 36 that descends or rises toward the fixed mold 35. Thus, long rib-shaped caulking projections 24 in the central axis direction are formed on the peripheral surface of the shaft main body 22. As shown in FIG. 8B, acute-angle cutting blades 37 and 37 are formed on the front and rear sides of the opposed surfaces of the fixed die 35 and the movable die 36, respectively. With the cutting blade 37 of the fixed die 35 supporting the shaft main body 22 on which the disk 23 is temporarily assembled, the movable die 36 is pivoted while the shaft main body 22 is positioned by the positioning frame 38 provided on the side end of the fixed die 35. By biting into the peripheral surface of the main body 22, rib-shaped caulking protrusions 24 protruding in an inverted V shape can be formed at four locations in the circumferential direction of the shaft main body 22 as shown in FIG. The caulking protrusions 24 are formed intermittently at regular intervals along the central axis direction of the shaft body 22 for each fixing position of each disk 23, but the phase position of each caulking protrusion 24 at the fixing position of each disk 23. Are aligned at a certain position. At the same time that the caulking projection 24 is formed, a biting mark 39 of the cutting edge 37 is formed.

(Process for press-fitting caulking protrusions)
In this step, as shown in FIG. 9, the disk 23 temporarily assembled to the shaft body 22 is supported by the support wall 41 of the jig 40. In this state, the shaft main body 22 is pushed downward along the central axis, and the lower end surface of the shaft main body 22 is circumscribed by the stopper 42 at the lower end of the jig 40, so that the caulking protrusion 24 and the loading hole 25 are press-fitted together. Thus, the portion on the projecting end side of the caulking projection 24 where the loading hole 25 has passed is scraped off by the loading hole 25, or conversely, a portion of the loading hole 25 is crushed on the base side of the remaining caulking projection 24. The disc 23 can be press-fitted and fixed to the shaft main body 22 because the two 24 and 25 are in close contact with each other.

(Process of forming the cutting blade)
In this step, as shown in FIGS. 4 and 5, the stainless steel plate 46 is etched to form the sheet-like blank 27 of the cutting blade 21. Specifically, the front and back surfaces of the stainless steel plate 46 having a thickness of 0.3 mm are etched to form the small blades 31 (31a and 31b) and the like. In the etching step, as shown in FIG. 4, a resist film 47 is formed on both front and back surfaces of the stainless steel plate 46, and then exposed, the exposed portion is removed, and the surface of the plate material surrounded by the non-exposed portion is etched with an etching solution. At this time, a large number of sheet-like blanks 27 are formed at the same time, and the bridging portions 48 provided on the sides thereof are cut to separate the sheet-like blanks 27 from the stainless steel plate material 46.

  By performing the etching process, a small blade 31 having a cross-sectional shape as shown in FIG. 4 is formed. The small blade 31 is divided into four parts: a cut surface 50 on the outer surface, a base surface 51 on the inner surface, and a scooping surface 52 and a scooping surface 53 formed in an indented shape on the side surface between the end edges of both of them. It is formed in a modified cross-sectional shape with corners. A cutting edge 54 is formed at a protruding end (edge) of the cutting surface 50 indicated by an arrow on the rotation direction side, and a scooping surface 52 is formed on the side surface of the inner blade 11 continuously to the cutting edge 54. Further, a clearance edge 55 is formed on the opposite edge of the blade edge 54, and a turning surface 53 is formed on the side surface of the inner blade 11 continuously to the clearance edge 55. The scooping surface 52 and the scooping surface 53 are formed as one concave curved surface extending from the edge of the cut surface 50 to the edge of the base surface 51. As an etchant, ferric chloride can be used. By this etching process, minute irregularities are formed on the surface of the scooping surface 52 and the scooping surface 53 that are not covered with the resist film 47.

(Process of forming a cutting blade blank)
In this step, as shown in FIGS. 6A and 6B, the sheet-like blank 27 is subjected to roll processing (plastic processing) to form a cylindrical cutting blade blank 28. Roll processing is performed by two base rollers 56 and 56 disposed on the lower side and a pressure roller 57 disposed above both base rollers 56 and 56, and a sheet is formed between both rollers 56 and 57. By passing the shaped blank 27, a cylindrical cutting blade blank 28 is formed. The cutting blade blank 28 is curved into an incomplete cylinder having a slit 58.

(Process of welding the cutting blade blank)
In this step, the cutting blade blank 28 of the cutting blade 21 is welded to the peripheral surface of the disk 23 of the rotary shaft body 20. Specifically, a cylindrical cutting blade blank 28 is externally fitted to the disk 23, and the cutting blade blank 28 is held with a jig having a semicircular cross section and is brought into close contact with the blade receiving surface 26 of the disk 23. In this state, the cutting blade blank 28 is welded to the disk 23 with a laser welding machine, whereby a cylindrical blade-shaped rotating blade blank 29 as shown in FIG. 11 is obtained.

(Heat treatment process)
In the heat treatment step, the rotary blade blank 29 is heated to about 1000 ° C., and after maintaining the state for a predetermined time, quenching is performed by sequentially cooling with water and heated oil. Thereby, the metal structure of the cutting blade 21 and the shaft body 22 can be martensitic, and the surface hardness can be enhanced. By heating the rotary blade blank 29, it is possible to remove internal distortion caused by heat generated at the periphery of the weld during laser welding. Temper as necessary.

(Polishing process)
In the polishing process, rough grinding and finish grinding are sequentially performed on the peripheral surface of the rotary blade blank 29 to improve the roundness of the peripheral surface of the cutting blade 21 and further sharpen the cutting edge 54. In the rough grinding process, the bulging surface of the welded portion is removed, and at the same time, the surface of the cutting blade 21 is ground. Further, in the finish grinding process, finish grinding is performed so that the surface roughness of the peripheral surface of the cutting blade 21 is reduced, and the diameter, roundness, and surface roughness of the outer peripheral surface of the inner blade 11 that is a rotary blade are performed. And finish in a predetermined state. In the rough grinding process, the bulging surface of the welded portion that is easily corroded is removed, so that the durability of the cutting blade 21 can be improved by removing the corrosion and cracking of the welded portion. As shown in FIG. 12, the polishing step can be performed by rotating the polishing roller 59 and the rotary blade blank 29 in the same direction while pressing the polishing roller 59 against the surface of the cutting blade 21. However, polishing may be performed by performing electrolytic polishing on the cutting blade 21. If the required specification for the roundness of the inner cutter 11 is low, the grinding process can be omitted.

(Photocatalyst formation process)
The formation process of the photocatalyst film is largely divided into a formation process of the underlayer 60 as shown in FIGS. 13A to 13D and a formation process of the photocatalyst layer 61 as shown in FIGS. 14A to 14D. Can be separated. In the formation process of the foundation layer 60, first, a chemical treatment (etching treatment) is performed in which the rotary blade blank 29 is immersed in an acidic solution (chemical polishing solution) containing an inorganic acid as a main component for a predetermined time. By such chemical treatment, a passive film is formed on the surfaces of the cutting surface 50, the base surface 51, the scooping surface 52, and the scoring surface 53 of the small blade 31, and micro-unevenness on the order of μm is formed on the surface. It is formed. Such fine irregularities 82 are formed by chemical treatment with an acidic solution prior to the formation of the photocatalytic film 75. Thus, when a passive film is formed, it can prevent effectively that each surface is corroded. In addition, the formation of minute irregularities increases the adhesion of the photocatalyst film 75 and prevents the photocatalyst film 75 from being accidentally dropped off. In addition, in such chemical treatment, minute irregularities are also formed on the surface of the rotating shaft 21. Therefore, the adhesiveness of the photocatalyst film 75 on the surface of the rotary shaft 21 is increased as in the case of the small blade 31, and the photocatalyst film 75 can be prevented from being accidentally dropped off. Specific examples of the chemical polishing liquid include known deburring agents in addition to ferric chloride (etching liquid) used when forming the sheet-like blank 27 of the cutting blade 21. Further, the chemical treatment can be carried out by spraying the acidic solution onto the rotary blade blank 29 with a spraying device or the like, in addition to being immersed in the acidic solution.

  Next, as shown in FIG. 13A, the rotary blade blank 29 is immersed in a binder tank 63 filled with the binder resin 62 constituting the base layer 60 for a predetermined time, and the entire surface of the rotary blade blank 29 is immersed. A binder resin 62 is adhered. Thus, the binder resin 62 can be attached to the surface of the small blade 31 constituted by the cut surface 50, the base surface 51, the scooping surface 52, and the scooping surface 53 with a substantially uniform thickness dimension.

  Next, as shown in FIG. 13B, a process for removing excess binder resin 62 adhering to the blade edge 54 and a process for thinning the base layer 60 made of the binder resin 62 are performed. Here, first, the rotary blade blank 29 is rotated around the shaft body 22 for a predetermined time (about 10 seconds), whereby the binder resin 62 is moved to the outer surface side of the small blade 31 by the centrifugal separation force, and an excess binder is used. Resin 62 is removed. Next, after arranging the blower outlet 65 of the blower so as to face the cutting edge 54 positioned at the uppermost part of the cutting blade 21, the rotary blade blank is arranged in the same direction (counterclockwise) as the rotation direction of the inner blade 11. While rotating 29 about the shaft body 22, the binder resin removal air 66 is fed from the outlet 65 (about 3 seconds). The air outlet 65 having a flat nozzle opening is located on a tangent line extending from the uppermost part of the cutting blade 21 and is downstream in the rotational direction of the cutting edge 54 of the uppermost cutting blade 21 (left side in the illustrated example). ). In this way, the binder resin 62 adhering to the blade edge 54 can be removed by supplying the removal air 66 from the downstream side in the rotation direction toward the blade edge 54 while rotating the cutting blade 21. Further, the removed air 66 can push the binder resin 62 adhering to the blade edge 54 to the lower side of the scooping surface 52. Therefore, the layer thickness of the binder resin 62 adhering to the scooping surface 52 can be gradually increased as the blade edge 54 side is thin and the blade edge 54 is separated.

  Next, as shown in FIG.13 (c), using the baking apparatus 67, it heat-processes with respect to the rotary blade blank 29 to which the binder resin 62 adheres (120-150 degreeC), and the binder resin 62 is solidified. Then, the base layer 60 is formed on the surface of the small blade 31. Next, as shown in FIG.13 (d), the rotary blade blank 29 is accommodated in the temperature-controlled room 68 maintained at 60 degreeC for predetermined time (about 10 minutes), and the rotary blade blank 29 is warmed. When the rotary blade blank 29 is warmed in this manner, the photocatalyst layer 61 adheres well to the underlayer 60 in the next step.

  In the subsequent step of forming the photocatalyst layer 61, first, as shown in FIG. 14A, the rotary blade blank 29 on which the base layer 60 was formed in the previous step is placed in the catalyst tank 70 filled with the liquid photocatalyst 71. The photocatalyst 71 is attached to the entire surface of the foundation layer 60 by dipping for a predetermined time. In this state, the photocatalyst 71 is attached to the surface of the foundation layer 60 with a substantially uniform thickness dimension.

  Next, the removal process of the excess photocatalyst 71 adhering to the blade edge | tip 54 and the thinning process of the photocatalyst layer 61 comprised with the photocatalyst 71 are performed (refer FIG.14 (b)). The method of the removal process and the thinning process is the same as that in FIG. That is, first, the rotary blade blank 29 is rotated around the shaft body 22 for a predetermined time (about 10 seconds), the photocatalyst 71 is moved to the outer surface side of the cutting blade 21 by centrifugal force, and the excess photocatalyst 71 is removed. To do. Next, after arranging the blower outlet 72 of the blower so as to face the uppermost blade edge 54 of the cutting blade 21, the rotary blade blank 29 is placed in the same direction (counterclockwise) as the rotation direction of the inner blade 11. While rotating around the shaft body 22, the removal air 73 of the photocatalyst 71 is fed from the outlet 72 (about 3 seconds). The blower outlet 72 having a flat nozzle opening is located on a tangent line extending from the uppermost part of the cutting blade 21 and is downstream in the rotation direction of the cutting edge 54 of the uppermost cutting blade 21 (left side in the illustrated example). ). Thus, the photocatalyst 71 adhering to the blade edge 54 is removed by supplying the removal air 73 from the downstream side in the rotation direction toward the blade edge 54 of the cutting blade 21 while rotating the cutting blade 21. Can do. Further, the removal air 66 can push the photocatalyst 71 adhering to the blade edge 54 to the lower side of the scooping surface 52. Therefore, the layer thickness of the photocatalyst 71 adhering to the surface of the base layer 60 of the scooping surface 52 can be made gradually thicker as the blade edge 54 side is thinner and away from the blade edge 54.

  Next, as shown in FIG.14 (c), using the baking apparatus 67, it heat-processes with respect to the rotary blade blank 29 to which photocatalyst 71 adheres (120-150 degreeC), solidifies photocatalyst 71, A photocatalytic layer 61 is formed on the underlayer 60. Finally, as shown in FIG. 14 (d), the grinding roller 74 and the rotary blade blank 29 are rotated in the same direction with the cutting surface 50 pressed against the polishing roller 74, thereby forming on the cutting surface 50. The underlying layer 60 and photocatalyst layer 61 thus formed are removed. From the above, the inner blade 11 as shown in FIG. 14D and FIG. 1 can be obtained. In addition, the removal operation | work of the base layer 60 and the photocatalyst layer 61 which were formed on the cut surface 50 in FIG.14 (d) can be abolished. This is because when the inner blade 11 is driven and rotated with the outer blade 10 mounted, the base layer 60 and the photocatalyst layer 61 formed on the cut surface 50 are removed by contact with the outer blade 10. .

(Inner blade configuration)
As shown in FIG. 1, the small blades 31 (31 a and 31 b) of the inner blade 11 have inner recesses on the outer cut surface 50, the inner base surface 51, and the side surfaces between the edges of the both 50 and 51. The scooping surface 52 and the scooping surface 53 are formed in a modified cross-sectional shape having four corners, and the cutting edge 50 is provided with a cutting edge 54 at the protruding end on the rotation direction side. The scooping surface 52 and the scooping surface 53 are formed as one concave curved surface extending from the edge of the cut surface 50 to the edge of the base surface 51, and the scooping surface 52, the scooping surface 53, and the surface of the base surface 51 are formed. Then, a photocatalytic film 75 having an indented shape composed of the base layer 60 and the photocatalyst layer 61 is formed.

  In addition, the thickness of the photocatalyst film 75 formed on the surface of the scooping surface 52 is thin on the blade edge 54 side by performing the above-described removal processing and thinning processing of FIG. 13B and FIG. 14B. As the distance from the blade edge 54 increases, the thickness gradually increases. More specifically, the film thickness of the photocatalytic film 75 on the scooping surface 52 is thin on the blade edge 54 side and gradually increases as it approaches the most concave portion 52a of the scooping surface 52, and passes through the most concave portion 52a. As the surface 51 is approached, it gradually becomes thinner. In FIG. 1, the dimension (D1) indicates the maximum film thickness dimension of the photocatalytic film 75 in the most concave portion 52a. Further, the surface curvature (R2) of the photocatalytic film 75 is smaller than the surface curvature (R1) of the scooping surface 52.

  The thickness dimension of the photocatalyst film 75 formed on the surface of the flange surface 53 is uniform, and the dimension (D2) in FIG. 1 indicates the film thickness dimension of the photocatalyst film 75 formed on the flange surface 53. The surface curvature (R4) of the photocatalyst film 75 is larger than the surface curvature (R3) of the turning surface 53. The maximum thickness dimension (D3) of the photocatalyst film 75 formed on the surface of the base surface 51 is larger than the maximum thickness dimension (D1) of the photocatalyst film 75 formed on the scooping surface 52.

  As described above, according to the electric razor according to the first embodiment, since the photocatalytic film 75 is formed on the scooping surface 52 and the like constituting the inner blade 11, the head portion is formed by the organic matter decomposing action and the antibacterial action of the photocatalytic film 75. The inside of 2 can be kept in a hygienic state. In addition, since the thickness dimension of the photocatalytic film 75 formed on the surface of the scooping surface 52 is thin on the blade edge 54 side and gradually increases as the distance from the blade edge 54 increases, the photocatalytic film 75 adheres to the blade edge 54. This can prevent the cutting ability of the inner blade 11 from being lowered. From the above, it is possible to obtain an electric razor having a good organic matter decomposing action and antibacterial action of the photocatalytic film 75 without impairing the cutting ability (sharpness).

  Since the scooping surface 52 is formed in an indented curved shape on the side surface of the small blade 31 (the first small blade 31 a and the second small blade 31 b) continuously to the cutting edge 54, the contact between the photocatalytic film 75 and the scooping surface 52. By increasing the area, it is possible to reliably prevent the photocatalytic film 75 from falling off the scooping surface 52. Moreover, since the surface curvature (R2) of the photocatalyst film 75 is made smaller than the surface curvature (R1) of the scooping surface 52, the size of the inner recess of the photocatalyst film 75 can be reduced. As a result, it is possible to effectively prevent dirt such as debris from accumulating in the indented portion of the photocatalytic film 75.

  If the photocatalyst film 75 is formed on the surface of the base surface 51 in addition to the surface of the scooping surface 52, the hard-to-clean portion of the inner blade 11 can be covered with the photocatalyst film 75. The inside of the head part 2 can be sterilized and washed by utilizing the decomposition action and the antibacterial action. In particular, if the thickness (D3) of the photocatalyst film 75 formed on the surface of the base surface 51 is larger than the maximum thickness (D1) of the photocatalyst film 75 formed on the surface of the scooping surface 52, the base The organic matter decomposing action and antibacterial action derived from the photocatalytic film 75 on the surface 51 side can be obtained over a longer period.

  When the maximum thickness dimension (D2) of the photocatalyst film 75 formed on the face 53 is larger than the maximum thickness (D1) of the photocatalyst film 75 formed on the face 52, the photocatalyst on the face 53 side is formed. The organic matter decomposing action and antibacterial action derived from the film 75 can be obtained over a longer period of time.

  Further, according to this electric razor, the photocatalytic film 75 is also formed on the surface of the rotary shaft 21 constituting the inner blade 11. Therefore, as with the blade 31, the organic matter decomposing action and the antibacterial action derived from the photocatalyst film 75 are also exerted on the hair adhering to the rotating shaft 21. In addition, since the micro unevenness 82 is formed on the surface of the base surface 51 and the photocatalytic film 75 is formed so as to cover the micro unevenness (the micro unevenness), the photocatalytic film 75 is formed so as to bite into the recess of the micro unevenness 82. The photocatalytic film 75 can be effectively prevented from falling off the base surface 51.

(Second embodiment)
FIG. 15 shows a second embodiment of the present invention. The small blade 31 of the inner blade 11 shown in FIG. 15 is different from the inner blade of the first embodiment in that the turning surface 53 is formed in a square shape with two concave curved surfaces. That is, the point which comprised the turning surface 53 by the 1st turning surface 80a and the 2nd turning surface 80b is different from the previous 1st Example. Since the other points are the same as those of the first embodiment, the same members are denoted by the same reference numerals and the description thereof is omitted.

(Third embodiment)
FIG. 16 shows a third embodiment of the present invention. The small blade 31 of the inner blade 11 shown in FIG. 16 has a point that a recess 81a is formed on the cut surface 50 by half etching, a point that a recess 81b is formed on the base surface 51 by half etching, and the recesses 81a and 81b. The point that the photocatalyst film 75 is formed so as to fill the inside is different from the first embodiment. Since the other points are the same as those of the first embodiment, the same members are denoted by the same reference numerals and the description thereof is omitted. As described above, when the recesses 81a and 81b are formed in the cut surface 50 and the base surface 51, it is possible to effectively prevent the photocatalytic film 75 from dropping from the cut surface 50 and the like. The organic substance decomposing action and antibacterial action derived from the photocatalytic film 75 can be obtained.

(Fourth embodiment)
FIG. 17 shows a fourth embodiment of the present invention. The small blade 31 of the inner blade 11 shown in FIG. 17 is different from the first embodiment in that a fine uneven portion 82 is further formed on the surface of the scooping surface 52 by etching. That is, as shown in the first embodiment described above, the surface of the blade 31 is etched by an etching process in the forming process of the sheet-like blank 27 and a chemical process using an acidic solution performed prior to the forming process of the foundation layer 60. However, in this embodiment, a further uneven etching process is performed to form a micro uneven portion 82 of μm order on the scooping surface 52. Since the other points are the same as those of the first embodiment, the same members are denoted by the same reference numerals and the description thereof is omitted. As described above, when the fine uneven portion 82 is formed on the surface of the scooping surface 52, the surface area of the scooping surface 52 is increased as in the first embodiment, and the photocatalytic film 75 and the scooping surface 52 Therefore, it is possible to effectively prevent the photocatalytic film 75 from falling off from the scooping surface 52. Thereby, the organic substance decomposing action and antibacterial action derived from the photocatalytic film 75 can be obtained over a longer period of time.

(5th Example)
18 and 19 show a fifth embodiment of the present invention. In the fifth embodiment, the scooping surface 52 and the scooping surface 53 formed on the side surfaces of the small blade 31 are formed by linear slopes, and the point where the concave portion 81 a is formed on the cutting surface 50 is the previous point. This is different from the first embodiment. Since the other points are the same as those of the first embodiment, the same members are denoted by the same reference numerals and the description thereof is omitted.

  The inner blade 11 can be formed by subjecting a sheet-like blade blank 83 formed by electroforming to press working, formation of a photocatalytic film 75, polishing treatment, and the like. Specifically, as shown in FIG. 19A, a photoresist film is formed on the upper surface of the mother die 84, a pattern film is placed on the surface, exposed and developed, and then a photoresist that matches the electroformed pattern. The layer 85 is formed, and the primary electroformed layer 86 is formed. Next, as shown in FIG. 19B, the secondary electroformed layer 87 is formed on the outer surface of the primary electroformed layer 86 while flowing the electroforming solution in the direction indicated by the arrow. By peeling off the secondary electroformed layer 87, a blade blank 83 provided with the small blade 31 having a trapezoidal cross section is obtained. Specifically, it is possible to form the unequal-leg trapezoidal small blade 31 in which the slope angle of the slope 88 on the upper side in the flow direction of the electroforming liquid is small and the slope angle of the slope 89 on the lower side in the flow direction is large.

  Next, by peeling off the secondary electroformed layer 87, a blade blank 83 as shown in FIG. 19C is obtained. Next, after pressing the blade blank 83 and plastically deforming the entire shape into a curved shape, the rotary blade blank 29 is formed by press processing in the same procedure as in the first embodiment, and the photocatalyst film 75 is formed. By performing formation and polishing treatment, an inner blade 11 as shown in FIG. 18 can be obtained.

  As shown in FIG. 18, the small blade 31 of the inner blade 11 includes a scooping surface 52 composed of a slope 88 with a small inclination angle and a scooping surface 53 composed of a slope 89 with a large inclination angle, and a cutting surface. On the 50 side, a recess 81 a corresponding to the primary electroformed layer 87 is provided. The protruding edge of the cut surface 50 becomes the cutting edge 54. A photocatalytic film 75 is formed on the surface of the base surface 51, the scooping surface 52, and the scooping surface 53. A photocatalytic film 75 is also formed in the recess 81 a of the cut surface 50. The thickness dimension of the photocatalytic film 75 on the scooping surface 52 is such that the blade edge 54 side is thin, and the thickness dimension gradually increases as the distance from the blade edge 54 increases.

(Sixth embodiment)
FIG. 20 shows a sixth embodiment of the present invention. The sixth embodiment is different from the first embodiment in that the photocatalytic film 75 is formed not by the dipping method (dipping method) but by the spray method. More specifically, in the inner blade 11 according to the present embodiment, a one-component solvent obtained by mixing a binder resin and a photocatalyst is sprayed from the nozzle opening of the spray 90 onto the scooping surface 52 and the scooping surface 53 of the small blade 31. In addition, the photocatalyst film 75 is formed by solidifying the solvent containing the photocatalyst. The thickness of the photocatalyst film 75 on the scooping surface 52 is controlled by gradually increasing the spraying time of the solvent to the scooping surface 52 by the spray 90 as the cutting edge 54 side is short and the distance from the cutting edge 54 is increased. Specifically, the thickness of the photocatalyst film 75 on the scooping surface 52 is gradually increased as the blade edge 54 side is thin and the distance from the blade edge 54 is increased. Other points are the same as in the first embodiment.

(Seventh embodiment)
FIG. 21 shows a seventh embodiment of the present invention. This seventh example is different from the previous sixth embodiment in that the photocatalytic film 75 on the side of the turning surface 53 is formed in an outer convex shape. The photocatalytic film 75 on the side of the turning surface 53 is formed in an outer convex shape on the surface of the first layer 91 by the spraying method on the surface of the first layer 91 and the first layer 91 formed in an indented shape along the turning surface 53. And the second layer 92. The other points are the same as in the sixth embodiment. As described above, when the photocatalytic film 75 on the side of the turning surface 53 is formed in an outer convex shape, the maximum thickness dimension of the photocatalytic film 75 on the side of the turning surface 53 can be increased. The organic substance decomposing action and antibacterial action derived from the photocatalytic film 75 can be obtained.

(Eighth embodiment)
FIG. 22 shows an eighth embodiment of the present invention. In the eighth embodiment, the point that the photocatalyst film 75 is not formed on the surface of the base surface 51 and the point that the photocatalyst film 75 formed on the surface of the second turned surface 80b is formed in an outer convex shape are the second embodiment. Different from the example. The photocatalytic film 75 on the second wrinkled surface 80b side is formed with a first layer 91 formed in an indented shape along the second wrinkled surface 80b by a spray method, and the surface of the first layer 91 is projected outward by a spray method. The second layer 92 is formed in a shape. The other points are the same as in the second embodiment.

(Ninth embodiment)
FIG. 23 shows a ninth embodiment in which the present invention is applied to a rotary electric shaver. In the ninth embodiment, a group of small blades 96 are implanted and fixed on the peripheral surface of a cylindrical holder 95 to constitute the inner blade 11. Each small blade 96 includes a base portion 97 protruding from the holder 95 and a cut portion 98 having a cup-shaped cross section provided at the tip of the base portion 97. The cutting portion 98 functions as the small blade 31 of the inner blade 11, and is formed on the side surface of the base portion 97 from the cutting surface 50 formed in an outwardly curved shape and the edge of the cutting surface 50 on the rotation direction side. It has a continuous scooping surface 52 and a scooping surface 53 continuous from the edge of the cutting surface 50 opposite to the rotation direction to the side surface of the base 97. A cutting edge 54 is formed at a corner portion defined by the edge of the cutting surface 50 in the rotation direction and the scooping surface 52, and is defined by the edge of the cutting surface 50 opposite to the rotation direction and the scooping surface 53. A relief edge 55 is formed at the corner portion. The scooping surface 52 is formed by an inclined surface formed in an inner dent shape from the cutting edge 54, and the scooping surface 53 is formed by an inclined surface formed in an inner dent shape from the escape edge 55.

  The photocatalytic film 75 in the present embodiment is formed on the side of the inner blade 11 in the rotational direction, on the scooping surface 52 and on the side surface of the base 97 projecting from the holder 95 continuously to the scooping surface 52. On the opposite side in the rotational direction, the surface is formed on the side surface of the base portion 97 protruding from the holder 95 in a continuous manner with the surface 53 and the surface 53. The thickness dimension of the photocatalytic film 75 formed on the scooping surface 52 is assumed to gradually increase as the distance from the blade edge 54 increases. The photocatalytic film 75 formed on the side of the turning surface 53 including the side surface of the base 97 is formed by the first layer 91 and the second layer 92, and the outermost surface of the second layer 92 is convex outward. Is formed. The photocatalytic film 75 on the scooping surface 52 and the scooping surface 53 is formed by a spray method.

(Tenth embodiment)
24 to 32 show a tenth embodiment in which the present invention is applied to a reciprocating electric shaver. As shown in FIGS. 25 and 26, the head portion 2 of the electric razor includes a head frame 14, a motor 4 fixed to the lower portion thereof, a cutting mechanism 100 disposed on the upper portion of the head portion 2, and the motor 4. A driving structure 101 that transmits power to the cutting mechanism 100 and an outer blade holder 12 that is attached to and detached from the head frame 14 are configured. The cutting mechanism 100 includes a left and right laterally long outer blade 10 and a left and right laterally long inner blade 11 that is driven to reciprocate left and right along the inner surface of the outer blade 10. The outer blade 10 is a sheet-like mesh blade formed by electroforming or etching, and is held in an inverted U shape by the outer blade holder 12. The inner blade 11 is formed of a slit blade that is pressed into a sheet blank 108 and bent into an inverted U shape, and is fixed in an inverted U shape by the inner blade holder 110. The sheet blank 108 is formed by an etching method as will be described later.

  A drive structure 101 that reciprocates the inner blade 11 includes an eccentric cam 102 that is fixed to the output shaft of the motor 4, a vibrator 103, and a drive shaft 104 that protrudes from the upper center of the vibrator 103. . The rotational power of the motor 4 is converted into reciprocating power by the eccentric cam 102 and the vibrator 103 and transmitted to the inner blade 11 through the drive shaft 104. The inner blade 11 is pushed up and biased by a compression coil spring 105 disposed between the vibrator 103 and the inner blade holder 110, and is always in close contact with the inner surface of the outer blade 10.

(Inner blade manufacturing method)
Next, the detail of the manufacturing method of the inner blade 11 is demonstrated. The manufacturing process of the inner blade 11 which is a reciprocating drive blade includes a step of forming the sheet blank 108, a step of pressing the sheet blank 108 to form the cutting blade blank 109, and a surface of the cutting blade blank 109. The process can be roughly divided into a process of forming the photocatalyst film 75 and a process of fixing the cutting blade blank 109 on which the photocatalyst film 75 is formed to the inner blade holder 110.

  As shown in FIG. 29, the sheet-like blank 108 is formed of a horizontally long sheet body, and rib-shaped small blades 31 and slit-shaped blade holes 112 are alternately formed in the left-right direction on the wall surface of the sheet body. ing. As shown in FIG. 24, the blade 31 has an inverted isosceles trapezoidal cross section with a cut surface 50 on the outer surface, a base surface 51 on the inner surface, and left and right scooping surfaces 52 and 52 curved in an inner recess shape. Formed as follows. Along with this, sharp edges 54 are formed on the left and right side edges of the cutting surface 50, respectively, and these cutting edges 54 cooperate with the outer blade 10 to cut the beard. In addition, acute corner portions 113 similar to the tip edge 54 are formed on the left and right side edges of the base surface 51. A photocatalytic film 75 is formed on the surfaces of the cut surface 50, the base surface 51, and the left and right scooping surfaces 52 and 52.

  The sheet-like blank 108 is formed by subjecting the stainless steel plate 46 having a thickness of 0.25 mm to an etching process. In the process, the surfaces 50, 51, and 52 constituting the blade 31 are formed. First, as shown in FIG. 28, in the etching process, resist films 47 and 47 are formed on both the front and back surfaces of the stainless steel plate 46, respectively, and then exposed, the exposed portions are removed, and the plate surface surrounded by the resist pattern is etched with an etching solution. Etch. The resist pattern on the back side is slightly smaller than the resist pattern on the front side. Therefore, the degree of etching on the back surface side becomes larger than the surface of the stainless steel plate material 46. The curved surface grown from the front surface (cut surface 50) side by the etching and the curved surface grown from the back surface (base surface 51) side finally become one curved surface to form a scooping surface 52. As the degree of etching on the side is larger, the taper is tapered toward the back side. As a result, the entire cross section of the small blade 31 is formed in an inverted isosceles trapezoid shape. At this time, as shown in FIG. 29, a large number of sheet-like blanks 108 are formed at the same time, and the bridging portions 48 provided on the sides are cut to separate the sheet-like blanks 108 from the stainless steel plate material 46. . In FIG. 29, reference numeral 114 denotes a mounting hole for mounting to the inner blade holder 110.

  Next, as shown in FIG. 30, in a state where the sheet blank 108 is set on the lower mold 116 having the U-shaped groove 115, the upper mold 118 having the convex ball portion 117 is pressed against the sheet blank 108 from above. The sheet blank 108 is pressed. Thereby, the cutting blade blank 109 plastically deformed into a U-shaped cross section can be obtained.

  The photocatalyst film forming step is largely divided into a base layer 60 forming step as shown in FIGS. 31A to 31D and a photocatalyst layer 61 forming step as shown in FIGS. 32A to 32C. Can be separated. In the formation process of the foundation layer 60, first, a chemical treatment (etching treatment) is performed in which the cutting blade blank 109 is immersed in an acidic solution (chemical polishing solution) mainly composed of an inorganic acid for a predetermined time. By such chemical treatment, a passive film is formed on the surfaces of the cutting surface 50, the base surface 51, and the scooping surfaces 52 and 52 of the small blade 31, and micro irregularities on the order of μm are formed on the surface. The Such fine irregularities 82 are formed by chemical treatment with an acidic solution prior to the formation of the photocatalytic film 75. Thus, when a passive film is formed, it can prevent effectively that each surface is corroded. In addition, the formation of minute irregularities increases the adhesion of the photocatalyst film 75 and prevents the photocatalyst film 75 from being accidentally dropped off.

  Next, as shown in FIG. 31A, the cutting blade blank 109 is immersed in a binder tank 63 filled with the binder resin 62 constituting the base layer 60 for a predetermined time, and the entire surface of the cutting blade blank 109 is immersed. A binder resin 62 is adhered. Thus, the binder resin 62 can be attached to the surface of the small blade 31 constituted by the cut surface 50, the base surface 51, and the scooping surfaces 52 and 52 with a substantially uniform thickness dimension.

  Next, as shown in FIG. 31 (b), a process for removing excess binder resin 62 adhering to the blade edge 54 and a process for thinning the underlayer 60 composed of the binder resin 62 are performed. Here, the cutting blade blank 109 is set in the centrifuge 120 so that the U-shaped projecting surface is directed to the rotation center axis 121 side of the centrifuge 120, and the centrifuge 120 is kept for a predetermined time (about 10 seconds). By rotating, the binder resin 62 is moved to the base surface side by centrifugal force, and the excess binder resin 62 is removed. Thereby, the binder resin 62 adhering to the blade edge 54 can be pushed to the scooping surface 52 side. Further, the layer thickness of the binder resin 62 adhering to the scooping surface 52 can be made gradually thicker as the blade edge 54 side is thinner and away from the blade edge 54.

  Next, as shown in FIG.31 (c), using the baking apparatus 67, the cutting blade blank 109 to which the binder resin 62 adheres is heat-processed (120-150 degreeC), and the binder resin 62 is solidified. Then, the base layer 60 is formed on the surface of the cutting blade 21. Next, as shown in FIG.31 (d), the rotary blade blank 29 is accommodated in the temperature-controlled room 68 maintained at 60 degreeC for predetermined time (about 10 minutes), and the cutting blade blank 109 is warmed. When the cutting blade blank 109 is thus warmed, the photocatalyst layer 61 adheres well to the underlayer 60 in the next step.

  In the subsequent step of forming the photocatalyst layer 61, first, as shown in FIG. 32A, the cutting blade blank 28 on which the base layer 60 was formed in the previous step is placed in the catalyst tank 70 filled with the liquid photocatalyst 71. The photocatalyst 71 is attached to the entire surface of the foundation layer 60 by dipping for a predetermined time. In this state, the photocatalyst 71 is attached to the surface of the foundation layer 60 with a substantially uniform thickness dimension.

  Next, the removal process of the excess photocatalyst 71 adhering to the blade edge | tip 54 and the thinning process of the photocatalyst layer 61 comprised with the photocatalyst 71 are performed (refer FIG.32 (b)). The method of the removal process and the thinning process is the same as that in FIG. That is, the cutting blade blank 109 is set in the centrifuge 120 so that the U-shaped projecting surface faces the rotation center axis 121 side of the centrifuge 120, and the centrifuge 120 is rotated for a predetermined time (about 10 seconds). Thus, the photocatalyst 71 is moved to the base surface 51 side by the centrifugal separation force, and the excess photocatalyst 71 is removed. Thereby, the photocatalyst 71 adhering to the blade edge 54 can be pushed to the scooping surface 52 side. Further, the layer thickness of the photocatalyst 71 adhering to the scooping surface 52 can be made gradually thicker as the blade edge 54 side is thinner and away from the blade edge 54.

  Finally, as shown in FIG. 32 (c), using the baking device 67, the photocatalyst 71 is attached to the cutting blade blank 119 by heating (120 to 150 ° C.) to solidify the photocatalyst 71, A photocatalytic layer 61 is formed on the underlayer 60. As described above, the inner blade 11 having the small blade 31 as shown in FIG. 24 can be obtained.

(Inner blade configuration)
As shown in FIG. 24, the small blade 31 of the inner blade 11 is formed in an inner dent shape on the cut surface 50 on the outer surface, the base surface 51 on the inner surface, and the side surface between the edges of both 50 and 51. The scooping surfaces 52 and 52 are formed in an inverted isosceles trapezoidal shape having four corners, and the cutting edges 50 are provided with cutting edges 54 and 54 at the left and right edges. The scooping surface 52 is formed as one concave curved surface extending from the edge of the cutting surface 50 to the edge of the base surface 51, and the base layer 60 and the surface of the scoring surface 52, the cutting surface 50, and the base surface 51 are formed. An indented photocatalyst film 75 composed of the photocatalyst layer 61 is formed.

  In addition, the thickness of the photocatalyst film 75 formed on the surface of the scooping surface 52 is thin on the blade edge 54 side by performing the removal process and the thinning process of FIG. 31B and FIG. 32B described above. As the distance from the blade edge 54 increases, the thickness gradually increases. More specifically, the film thickness of the photocatalytic film 75 on the scooping surface 52 is thin on the blade edge 54 side and gradually increases as it approaches the most concave portion 52a of the scooping surface 52, and passes through the most concave portion 52a. As the surface 51 is approached, it gradually becomes thinner. In FIG. 24, the dimension (D1) indicates the maximum film thickness dimension of the photocatalytic film 75 in the most concave portion 52a. Further, the surface curvature (R2) of the photocatalytic film 75 is smaller than the surface curvature (R1) of the scooping surface 52.

(Eleventh embodiment)
FIG. 33 shows an eleventh embodiment of the present invention. In this eleventh embodiment, instead of the removal process of the binder resin 62 and the photocatalyst 71 using the centrifuge 120 and the thinning process of the underlayer 60 and the photocatalyst layer 61, the removal process is performed using a blower. This is different from the previous tenth embodiment. Specifically, in the present embodiment, in the formation process of the base layer 60, the binder resin 62 is applied to the surface of the small blade 31 in the same procedure as in FIG. The blower outlet 65 of the blower is disposed so as to face, and the removal air 66 of the binder resin 62 is fed from the outlet 65 to remove the binder resin 62 adhering to the blade edge 54 and the binder adhering to the scooping surface 52. It is assumed that the layer thickness of the resin 62 is thin on the blade edge 54 side and gradually increases as the distance from the blade edge 54 increases. Similarly, in the formation process of the photocatalyst layer 61, the photocatalyst 71 is applied to the surface of the small blade 31 in the same procedure as in FIG. 32A, and then the blower blows so as to face the cutting edge 54 of the small blade 31. The outlet 72 is disposed, and the removal air 73 of the photocatalyst 71 is supplied from the blowout port 72 to remove the photocatalyst 71 adhering to the blade edge 54, and the layer thickness dimension of the photocatalyst 71 adhering to the scooping surface 52 is changed to the blade edge 54. It is assumed that the side is thin and gradually increases as the distance from the blade edge 54 increases. The other steps are the same as in the previous tenth embodiment.

(Twelfth embodiment)
FIG. 34 shows a twelfth embodiment of the present invention. In this 12th Example, the arrangement position of the blower outlets 65 * 72 of a blower, and the delivery method of the removal air 66 * 73 from these blower outlets 65 * 72 differ from 11th Example. Specifically, the blower outlets 65 and 72 of the blower are arranged so as to face the wall surface of the cut surface 50, and the removal air 66 and 73 is fed from the blower outlets 65 and 72 toward the cut surface 50. The binder resin 62 or the photocatalyst 71 adhering to the blade edge 54 is removed, and the layer thickness dimension of the binder resin 62 and the photocatalyst 71 on the scooping surface 52 is made thinner on the blade edge 54 side and gradually increases as the distance from the blade edge 54 increases. To do. The other steps are the same as in the previous eleventh embodiment.

(Thirteenth embodiment)
35 to 40 show a thirteenth embodiment of the present invention. As shown in FIG. 35, in the thirteenth embodiment, the inner blade 11 is configured by implanting and fixing a large number of cutting blades 123 on the upper surface of the inner blade holder 110 that is long in the left-right direction. Each cutting blade 123 is a flat plate made of stainless steel formed in a U shape in a side view (see FIG. 38), and is formed on the outer peripheral edge with a thin depressed portion 124 that is recessed in the center of the board surface. And a thick bulge 125. The upper end portion of the bulging portion 125 of the cutting blade 123 functions as the small blade 31 in the present invention, and the bulging portion 125 is constricted from the flat cutting surface 50 and the left and right peripheral edges of the cutting surface 50. It is formed in a cross-sectional cup shape having a pair of left and right scooping surfaces 52 and 52 formed in a tapered shape (see FIG. 35). A blade edge 54 is formed at a corner portion defined by the edge of the cutting surface 50 of each small blade 31 and the scooping surface 52, and the blade edge 54 cooperates with the outer blade 10 (see FIG. 26) to make a beard. Disconnect. In the present embodiment, the photocatalytic film 75 is formed on the left and right side surfaces of the small blade 31 including the scooping surface 52.

(Inner blade manufacturing method)
Next, the detail of the manufacturing method of the inner blade 11 is demonstrated. The manufacturing process of the inner blade 11 that is a reciprocating blade includes a step of forming the plate blank 126, a step of polishing the plate blank 126 to form a cutting blade blank 127 having the cutting surface 50, and cutting. It can be roughly divided into a process of forming the photocatalytic film 75 on the surface of the blade blank 127.

  First, as shown in FIG. 36, a semicircle that bulges so as to connect the straight side 130 and both ends of the straight side 130 by pressing the upper die 129 with the stainless steel plate 46 set in the lower die 128. A bowl-shaped plate member 132 having an arcuate curved side 131 is cut out. Next, as shown in FIG. 37 (a), the plate material 132 is pressed using a pair of upper and lower press dies 135 and 135 having a flat surface 133 and a flank 134 continuous to the flat surface 133. Apply. Here, the flat surface 133 is pressed from the vertical direction only on the center portion of the plate surface of the plate material 132. Thus, as shown in FIG. 37B, a plate-like blank 126 having a depressed portion 124 at the center of the board surface and having a bulging portion 125 protruding in the vertical direction on the outer peripheral edge along the curved side 131 is obtained. .

  Next, as shown in FIG. 38, the outer peripheral edge along the straight side 130 of the plate blank 126 is embedded and fixed in the blade holder 110, and the bulging portion 125 related to the apex portion of the curved side 131 is attached to the polishing roller 136. Press to polish. By this polishing process, it is possible to obtain a cutting blade blank 127 having a flat cutting surface 50 at the bulging portion 125 related to the apex portion of the curved side 131 (see FIG. 35).

  The photocatalyst film forming process is largely divided into a base layer 60 forming process as shown in FIGS. 39A to 39D and a photocatalyst layer 61 forming process as shown in FIGS. 40A to 40C. Can be separated. In the formation process of the foundation layer 60, first, a chemical treatment (etching treatment) is performed in which the cutting blade blank 127 is immersed in an acidic solution (chemical polishing solution) containing an inorganic acid as a main component for a predetermined time. By such chemical treatment, a passive film is formed on the surfaces of the cutting surface 50, the base surface 51, and the scooping surfaces 52 and 52 of the small blade 31, and micro irregularities on the order of μm are formed on the surface. The Such fine irregularities 82 are formed by chemical treatment with an acidic solution prior to the formation of the photocatalytic film 75. Thus, when a passive film is formed, it can prevent effectively that each surface is corroded. In addition, the formation of minute irregularities increases the adhesion of the photocatalyst film 75 and prevents the photocatalyst film 75 from being accidentally dropped off.

  Next, as shown in FIG. 39A, the cutting blade blank 127 is immersed in a binder tank 63 filled with the binder resin 62 constituting the base layer 60 for a predetermined time, and the entire surface of the cutting blade blank 127 is placed. A binder resin 62 is adhered. Thus, the binder resin 62 can be attached to the surface of the small blade 31 such as the cut surface 50 and the scooping surfaces 52 and 52 with a substantially uniform thickness.

  Next, as shown in FIG. 39 (b), a process for removing excess binder resin 62 adhering to the blade edge 54 and a process for thinning the base layer 60 made of the binder resin 62 are performed. Here, the cutting blade blank 127 is set in the centrifuge 120 so that the apex portion of the curved side 131 is directed to the rotation center axis 121 side of the centrifuge 120, and the centrifuge 120 is set for a predetermined time (about 10 seconds). By rotating, the binder resin 62 is moved to the depressed portion 124 side by centrifugal force, and the excess binder resin 62 is removed. Thereby, the binder resin 62 adhering to the blade edge 54 can be pushed to the scooping surface 52 side. Further, the layer thickness of the binder resin 62 adhering to the scooping surface 52 can be made gradually thicker as the blade edge 54 side is thinner and away from the blade edge 54.

  Next, as shown in FIG. 39C, the baking blade 67 is used to heat the cutting blade blank 127 to which the binder resin 62 is adhered (120 to 150 ° C.) to solidify the binder resin 62. Then, the base layer 60 is formed on the surface of the small blade 123. Next, as shown in FIG. 39 (d), the rotary blade blank 29 is accommodated in a temperature-controlled room 68 maintained at 60 ° C. for a predetermined time (about 10 minutes), and the cutting blade blank 127 is heated. When the cutting blade blank 127 is warmed in this way, adhesion of the photocatalyst layer 61 to the underlayer 60 in the next step becomes good.

  In the subsequent formation process of the photocatalyst layer 61, first, as shown in FIG. 40 (a), the cutting blade blank 28 on which the underlayer 60 was formed in the previous process is placed in the catalyst tank 70 filled with the liquid photocatalyst 71. The photocatalyst 71 is attached to the entire surface of the foundation layer 60 by dipping for a predetermined time. In this state, the photocatalyst 71 is attached to the surface of the foundation layer 60 with a substantially uniform thickness dimension.

  Next, the removal process of the excess photocatalyst 71 adhering to the blade edge | tip 54 and the thinning process of the photocatalyst layer 61 comprised with the photocatalyst 71 are performed (refer FIG.40 (b)). The method of the removal process and the thinning process is the same as that in FIG. That is, the cutting blade blank 127 is set in the centrifuge 120 so that the apex of the curved side 131 is directed to the rotation center axis 121 side of the centrifuge 120, and the centrifuge 120 is rotated for a predetermined time (about 10 seconds). As a result, the photocatalyst 71 is moved to the depressed portion 124 side by centrifugal force, and the excess photocatalyst 71 is removed. Thereby, the photocatalyst 71 adhering to the blade edge 54 can be pushed to the scooping surface 52 side. Further, the layer thickness of the photocatalyst 71 adhering to the scooping surface 52 can be made gradually thicker as the blade edge 54 side is thinner and away from the blade edge 54.

  Finally, as shown in FIG. 40 (c), using the baking device 67, the photocatalyst 71 is attached to the cutting blade blank 127 by heating (120 to 150 ° C.) to solidify the photocatalyst 71, A photocatalytic layer 61 is formed on the underlayer 60. From the above, the inner blade 11 having the photocatalyst film 75 formed on the surface of the small blade 123 as shown in FIG. 35 can be obtained.

(14th embodiment)
41 to 45 show a fourteenth embodiment of the present invention. As shown in FIG. 41, in the fourteenth embodiment, the photocatalytic film 75 is formed not only on the small blade 31 of the inner blade 11 but also on the surface of the small blade 140 of the outer blade 10. Each of the small blades 140 includes four inner cutting surfaces 141, an outer base surface 142, and scooping surfaces 143 and 143 formed inwardly on the left and right side surfaces between the edges of both 141 and 142. It is formed in a cross-sectional cup shape with corners. A cutting edge 144 is formed at a corner defined by the cutting surface 141 and the scooping surface 143, and a scooping surface 143 is formed on the side surface of the outer blade 10 continuously to the cutting edge 144. The scooping surface 143 is formed as one concave curved surface extending from the end edge of the cut surface 141 to the end edge of the base surface 142. Photocatalytic films 75 are formed on the surfaces of the base surface 142 and the scooping surfaces 143 and 143. Since the configuration of the inner blade 11 in this embodiment is the same as that of the first embodiment, the same members are denoted by the same reference numerals, and the description thereof is omitted. In addition, the cutting edges 144 and 54 of the double-edged blades 10 and 11 cooperate to perform hair cutting.

  The outer blade 10 in the present embodiment is formed through a step of forming a sheet-like blank 146 having a small blade 140 and a step of forming a photocatalytic film 75 on the sheet-like blank 146. In the step of forming the sheet-like blank 146, as shown in FIGS. 42 and 43, the resist film 148 is formed on the front and back surfaces of the stainless steel plate 147 having a thickness of 0.3 mm, and then exposed to remove the exposed portion. A sheet-like blank 146 having a large number of blade holes 149 and small blades 140 formed on the peripheral edge of the blade holes 149 is formed by etching the surface of the plate surrounded by the non-exposed portion with an etching solution. At this time, a large number of sheet-like blanks 146 are formed at the same time, the bridging portions 150 provided on the sides thereof are cut, and the sheet-like blanks 146 are separated from the peripheral stainless steel plate 147. The small blade 140 formed on the peripheral edge of the blade hole 149 by etching has an inner cut surface 141, an outer base surface 142, and a scooping surface 143 formed in an indented shape on the side surface between the two edges. -It is comprised with 143.

  The formation process of the photocatalyst film 75 includes a formation process of the base layer 60 as shown in FIGS. 44A to 44D and a formation process of the photocatalyst layer 61 as shown in FIGS. Can be divided roughly. In the formation process of the foundation layer 60, first, a chemical treatment (etching treatment) is performed in which the sheet-like blank 146 is immersed in an acidic solution (chemical polishing solution) containing an inorganic acid as a main component for a predetermined time. By such chemical treatment, a passive film is formed on the surfaces of the cutting surface 141, the base surface 142, and the scooping surfaces 143 and 143 of the small blade 140, and minute irregularities on the order of μm are formed on the surface. The Such fine irregularities 82 are formed by chemical treatment with an acidic solution prior to the formation of the photocatalytic film 75. Thus, when a passive film is formed, it can prevent effectively that each surface is corroded. In addition, the formation of minute irregularities increases the adhesion of the photocatalyst film 75 and prevents the photocatalyst film 75 from being accidentally dropped off.

  Next, as shown in FIG. 44 (a), the sheet blank 146 is immersed in a binder tank 63 filled with the binder resin 62 constituting the foundation layer 60 for a predetermined time, and the whole surface of the sheet blank 146 is immersed. A binder resin 62 is adhered. Thus, the binder resin 62 can be attached to the surface of the small blade 140 constituted by the cut surface 141, the base surface 142, and the scooping surfaces 143 and 143 with a substantially uniform thickness dimension.

  Next, as shown in FIG. 44 (b), a process for removing excess binder resin 62 adhering to the blade edge 144 and a process for thinning the base layer 60 made of the binder resin 62 are performed. Here, first, the sheet-like blank 146 is set in the centrifuge 120 so that the base surface 142 faces the rotation center axis 121 side of the centrifuge 120, and the sheet-like blank 146 is centered on the rotation center axis 121. By rotating for a predetermined time (about 10 seconds), the binder resin 62 is moved to the outer surface of the sheet-like blank 146 by centrifugal force, and excess binder resin 62 is removed. Next, after arranging the blower outlet 65 of the blower so as to face the blade edge 144, the centrifuge 120 is stopped at a position where the removal air 66 can be fed to the blade edge 144, and the binder resin 62 is discharged from the blower outlet 65. The removal air 66 is supplied (about 3 seconds), and the binder resin 62 adhering to the blade edge 144 is removed. Further, the removed air 66 can push the binder resin 62 adhering to the cutting edge 144 to the lower side of the scooping surface 143 and the center side of the cutting surface 141. Therefore, the layer thickness of the binder resin 62 adhering to the scooping surface 143 can be gradually increased as the blade edge 144 side is thin and the blade edge 144 is separated. Removal of the binder resin 62 adhering to the blade edge 144 is performed for each sheet-like blank 146 set in the centrifuge 120.

  Next, as shown in FIG. 44 (c), the baking blank 67 is used to heat the sheet-like blank 146 to which the binder resin 62 is adhered (120 to 150 ° C.) to solidify the binder resin 62. Then, the base layer 60 is formed on the surface of the small blade 140. Next, as shown in FIG. 44 (d), the rotary blade blank 29 is accommodated in a temperature-controlled room 68 maintained at 60 ° C. for a predetermined time (about 10 minutes), and the sheet blank 146 is warmed. When the sheet blank 146 is warmed in this way, the photocatalyst layer 61 adheres well to the underlayer 60 in the next step.

  In the subsequent step of forming the photocatalyst layer 61, first, as shown in FIG. 45A, the sheet-like blank 146 on which the underlayer 60 was formed in the previous step is placed in the catalyst tank 70 filled with the liquid photocatalyst 71. The photocatalyst 71 is attached to the entire surface of the foundation layer 60 by dipping for a predetermined time. In this state, the photocatalyst 71 is attached to the surface of the foundation layer 60 with a substantially uniform thickness dimension.

  Next, the removal process of the excess photocatalyst 71 adhering to the blade edge | tip 144 and the thinning process of the photocatalyst layer 61 comprised with the photocatalyst 71 are performed (refer FIG.45 (b)). The method of the removal process and the thinning process is the same as that in FIG. That is, the sheet blank 146 is set in the centrifuge 120 so that the base surface 142 is directed to the rotation center axis 121 side of the centrifuge 120, and the sheet blank 146 is centered on the rotation center axis 121 for a predetermined time ( By rotating about 10 seconds), the photocatalyst 71 is moved to the outer surface of the sheet-like blank 146 by centrifugal force, and the excess photocatalyst 71 is removed. Next, after arranging the blower outlet 65 of the blower so as to face the blade edge 144, the centrifugal separator 120 is stopped at a position where the removal air 66 can be supplied to the blade edge 144, and the photocatalyst 71 is removed from the blower outlet 65. Air 66 is supplied (about 3 seconds), and the photocatalyst 71 adhering to the blade edge 144 is removed. Further, the removal air 66 can push the photocatalyst 71 adhering to the cutting edge 144 to the lower side of the scooping surface 143 and the center side of the cutting surface 141. Therefore, the layer thickness of the photocatalyst 71 attached to the scooping surface 143 can be gradually increased as the blade edge 144 side is thin and the blade edge 144 is separated. The removal of the photocatalyst 71 adhering to the blade edge 144 is performed for each sheet-like blank 146 set in the centrifuge 120.

  Next, as shown in FIG.45 (c), using the baking apparatus 67, it heat-processes with respect to the sheet-like blank 146 to which photocatalyst 71 adheres (120-150 degreeC), solidifies photocatalyst 71, A photocatalytic layer 61 is formed on the underlayer 60. Finally, as shown in FIG. 45 (d), the cut surface 141 of the sheet blank 146 is pressed against the polishing roller 74, thereby removing the underlayer 60 and the photocatalyst layer 61 formed on the cut surface 141. As described above, the outer blade 10 as shown in FIGS. 41 and 45 (d) can be obtained. In addition, the surface curvature (R6) of the photocatalytic film 75 is smaller than the surface curvature (R5) of the scooping surface 143 by the thinning process (see FIG. 41).

(15th embodiment)
FIG. 46 shows a fifteenth embodiment of the present invention. The electric razor to be cleaned by the cleaning device 160 of the present embodiment is the same as that shown in the first embodiment, and the head portion 2 has an arch-shaped outer blade 10 made of a mesh blade and an outer blade 10. A rotary type inner blade 11 that is in sliding contact with the inner surface of the inner blade 11 is provided, and the inner blade 11 is rotationally driven by the rotational power of the motor 4 (see FIG. 2) to cut the whiskers. The photocatalyst film 75 is formed on the scooping surface 52 of the small blade 31 of the inner blade 11 and the thickness of the photocatalyst film 75 formed on the scooping surface 52 gradually increases as the distance from the blade edge 54 increases. Some points are as described above (see FIG. 1).

  The cleaning device 160 includes a base wall 162 that contacts the desk surface 161 and a housing 163 that is erected from the outer peripheral edge of the base wall 162. A pocket 164 for accommodating the electric razor in an inverted position is formed in the center of the upper surface of the housing 163, and the head portion 2 is dried inside the housing 163 so as to surround the pocket 164. There are provided a drying means 165 for irradiating and an ultraviolet irradiation means 166 for irradiating the head unit 2 with ultraviolet light for photocatalyst excitation. The pocket 164 includes a side wall 167 supporting the side of the electric razor and a bottom wall 168 provided at the lower end of the side wall 167. The drying means 165 and the ultraviolet irradiation means 166 are the heads of the electric razor housed in the pocket 164. It is provided at a position facing the portion 2 in proximity.

  Specifically, the drying unit 165 includes a fan 170 disposed on the side of the pocket 164 and driven by a motor (not shown), and a heater 171 disposed below the pocket 164. The ultraviolet irradiation means 166 is composed of an ultraviolet irradiation lamp disposed below the pocket 164. The fan 170, the heater 171, and the ultraviolet irradiation means 166 are arranged to face the head portion 2 of the electric razor mounted in the pocket 164. A ventilation hole 172 is formed in the side wall 167 of the pocket 164, and air sent from the fan 170 is supplied to the head unit 2 through the ventilation hole 172. The bottom wall 168 of the pocket 164 is provided with a transparent window 173 and a heat transfer body 174, and the ultraviolet light irradiated from the ultraviolet irradiation means 166 is irradiated to the head unit 2 through the transparent window 173, and a photocatalytic film. The photocatalyst 71 constituting 75 is excited. A heater 171 is provided on the lower surface of the heat transfer body 174, and heat generated from the heater 171 is transferred to the head unit 2 through the heat transfer body 174.

  A cleaning method for an electric shaver using the cleaning device 160 configured as described above is performed in the following procedure. First, the internal cleaning of the head unit 2 is performed by hand washing or water washing means (not shown). Next, when the electric razor washed with water is stored in the pocket 164 of the cleaning device 160 in an inverted position, the fan 170 and the heater 171 are driven to perform a drying process by the drying means 165. At the same time, the ultraviolet irradiation means 166 is driven to irradiate the photocatalytic film 75 formed on the inner blade 11 of the head unit 2 through the transparent window 173 with ultraviolet light. As described above, when the photocatalyst 71 is irradiated with ultraviolet light while performing the drying process by the drying means 165, an improvement in the sterilization effect by the photocatalyst 71 can be expected.

(Sixteenth embodiment)
FIG. 47 shows a sixteenth embodiment of the present invention. In this case, a guard body 181 for restricting the amount of biting of the rotary blade 180 is provided around the rotary blade 180, and both the 180 and 181 are rotated by motor power. The guard body 181 is formed in a coil spring shape, and the coil portion is wound around the peripheral surface of the rotary blade 180 and both ends thereof are fixed to the rotary blade 180. The rotary blade 180 is provided with a small blade 31, and the photocatalytic film 75 as described above is formed on the surface of the small blade 31. Thus, this invention is applicable also to the electric shaver which is not equipped with the outer blade.

(Seventeenth embodiment)
48 to 50 show a seventeenth embodiment in which the cutting apparatus according to the present invention is applied to a clipper. As shown in FIG. 49, the clipper 190 includes a main body portion 1, a motor 4 disposed therein, a shear blade unit 191 disposed in the head portion 2 at the front end of the main body portion 1, and the like. The shear blade unit 191 includes a fixed blade 10 and a movable blade (cut blade) 11, and the movable blade 11 is reciprocated in the left-right direction by an eccentric cam 192 fixed to the output shaft of the motor 4.

  As shown in FIG. 50, the movable blade 11 is a stainless molded product including a rectangular base plate 193 and a plurality of comb-shaped small blades 31 arranged at the front end of the base plate 193. Each of the blades 31 has a tapered shape with a width that decreases toward the tip, and these blades 31 extend from the edge of the base plate 193 to the front in a cantilevered manner. Has been formed. The small blades 31 are arranged at equal intervals on the front end of the base plate 13, and a comb groove 195 is formed between adjacent small blades 31.

  As shown in FIG. 48, each of the small blades 31 of the movable blade 11 is formed in an indented shape on the inner cut surface 50, the outer base surface 51, and the left and right side surfaces between the edges of both 50 and 51. The scooping surfaces 52 and 52 are formed in a cross-shaped cup shape with four corners. A cutting edge 54 is formed at a corner defined by the cutting surface 50 and the scooping surface 52, and a scooping surface 52 is formed on the side surface of the small blade 31 continuously to the cutting edge 54. The scooping surface 52 is formed as one concave curved surface that extends from the edge of the cut surface 50 to the edge of the base surface 51. A photocatalytic film 75 is formed on the surface of the base surface 51 and the scooping surfaces 52 and 52. The thickness dimension of the photocatalyst film 75 formed on the scooping surface 52 gradually increases as the distance from the blade edge 54 increases.

2 Head part 10 Outer blade 11 Inner blade 31 Small blade 50 Cutting surface 51 Base surface 52 Scooping surface 53 Turning surface 54 Cutting edge 65 Outlet 66 Removed air 71 Photocatalyst 72 Outlet 73 Removed air 75 Photocatalyst film 81a Concave 81b Concave 140 Small blade 141 cutting surface 142 base surface 143 scooping surface 144 cutting edge 160 cleaning device 165 drying means 166 ultraviolet irradiation means

Claims (4)

A cutting device comprising a cutting blade (11),
The small blade (31) provided on the cutting blade (11) is provided on the side surface of the small blade (31) continuously to the blade edge (54) provided at the protruding end of the outer surface (50) and the blade edge (54). A scooping surface (52) formed in a recess shape,
A photocatalytic film (75) is formed on the surface of at least the scooping surface (52) of the small blade (51),
Thickness of rake face (52) which is formed on the photocatalytic film (75) is, with increasing distance from the cutting edge (54), Ri gradually becomes thicker ones and Citea,
The scooping surface (52) is formed in an indented curved shape on the side surface of the small blade (31) continuously to the cutting edge (54),
Surface curvature of the photocatalyst film (75) (R2) is rake face (52) cutting device characterized that you have been set smaller than the surface curvature (R1) of. A cutting device comprising a mesh-shaped fixed outer blade (10) and an inner blade (11) that performs a cutting operation in cooperation with the fixed outer blade (10),
The small blade (31) provided on the inner blade (11) is formed on the side surface of the small blade (31) continuously to the blade edge (54) provided at the protruding end of the outer surface (50) and the blade edge (54). A scooping surface (52) formed in a recess shape,
The small blade (140) provided on the fixed outer blade (10) has a cutting edge (144) and a scooping surface (143) formed in an inner concave shape on the side surface continuously to the cutting edge (144),
The photocatalyst film (75/75) is formed on the surface of at least the scooping surface (52/143) of both small blades (31/140),
A cutting apparatus characterized in that the thickness dimension of the photocatalyst film (75) formed on both scooping surfaces (52, 143) gradually increases with increasing distance from the cutting edge (54, 144) . The scooping surface (52) of the small blade (31) of the inner blade (11) is formed in an indented curved shape on the side surface of the small blade (31) continuously to the blade edge (54),
The scooping surface (143) of the small blade (140) of the fixed outer blade (10) is formed in an indented curved shape on the side surface of the small blade (140) continuously to the blade edge (144). The cutting device as described. The surface curvature (R2) of the photocatalytic film (75) formed on the small blade (31) of the inner blade (11) is set smaller than the surface curvature (R1) of the scooping surface (52),
The surface curvature (R6) of the photocatalyst film (75) formed on the small blade (140) of the fixed outer blade (10) is set smaller than the surface curvature (R5) of the scooping surface (143). 3. The cutting device according to 3 .

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