JP5839395B2 - Nose hair cutter outer blade manufacturing method - Google Patents

Description

The present invention relates to an outer cutter manufacturing method using the nose hair cutter for cutting the inner cutter nose hair entering the distal end of the cylindrical outer blade to slit extending in an axial direction, rotates in contact with the inner surface of said outer cutter It is.

  In this type of nose hair cutter, the outer blade is formed in a metal cylinder (including a truncated cone shape) with an outer diameter that can be inserted into the nostril, and a blade groove (slit) extending in the axial direction from the tip portion. We use what we did. 7 is a plan view (A) and a front view (B) of a conventional outer cutter, and FIG. 8 is a sectional view taken along the line VIII-VIII in the front view (B). In these figures, reference numeral 50 denotes a metal outer blade, which has a substantially cylindrical shape with a reduced diameter at the top or a substantially truncated cone shape (a shape obtained by cutting the vicinity of the top of the cone). A plurality of slits (blade grooves) 50 </ b> A extending in the axial direction from the distal end surface are formed in a substantially comb shape at the distal end portion of the outer blade 50. That is, the tip of each slit 50A is open. The outer blade 50 is fixed to a resin outer blade base 52, and the outer blade base 52 is attached to a main body (not shown).

  The outer blade base 52 has a substantially conical cylinder shape with a reduced diameter at the upper portion, and the outer blade 50 is fixed so as to protrude upward from the lower inner side of the outer blade base 52 through the upper opening. For example, a plurality of flange portions 50B are formed on the lower edge of the outer blade 50 at intervals in the circumferential direction, and a stopper 52A is formed on the inner surface of the outer blade base 52 with a circumferential gap passing through the flange portion 50B from below. Is integrally formed, the flange portion 50B of the outer blade 50 is inserted into the outer blade base 52 through the gap of the stopper 52A, and the outer blade 50 is pressed while pressing the flange portion 50B against the lower surface of the opening edge 52B of the outer blade base 52. By turning, the flange portion 50B can be engaged with and fixed to the stopper 52A. The outer blade 50 may be inserted into a resin-molding mold of the outer blade base 52, and both may be integrally molded (insert molding).

  Here, an inner blade (not shown) is slidably loaded inside the outer blade 50, and this inner blade is rotationally driven by an electric motor housed in the main body. The main body is provided with a battery, an electric circuit, a switch, and the like, and controls the motor by turning on / off the switch.

  The outer blade 50 used here is manufactured by the process shown in FIG. 9, for example. This method is a method conventionally used by the applicant. That is, first, a flat metal plate having an appropriate thickness is prepared (step S200 in FIG. 9), and is drawn into a substantially cylindrical shape (including a substantially conical cylindrical shape) having a diameter that can be inserted into the nostril by pressing. (This state is also referred to as a drawn product or a workpiece. Step 202 in FIG. 9). The drawn product is heat-treated and quenched (step S204), and then the slit 50A is grooved with a rotary cutter (step S206). The reason for performing quenching (step S204) is to enable smooth subsequent grooving (step S206). That is, if this quenching is not performed, large burrs will be produced during grooving and workability will deteriorate.

  Further, in order to perform grooving, it is necessary to increase the rigidity of the workpiece, and it is also necessary to make the thickness of the metal plate of the outer blade appropriate. Therefore, for example, a metal plate (metal thick plate, blank) of 0.65 to 0.7 mm is used as the metal plate. Further, when grooving is performed on the hardened workpiece, burrs are inevitably generated due to the processing, and it is necessary to perform deburring. For this reason, barrel polishing is required (step S208). In this barrel polishing, a polishing stone, a workpiece, a compound, and water are mixed and filled in a polishing tank at a fixed ratio, and the polishing tank is moved by applying motion to rub the polishing stone and the workpiece.

  Patent Document 1 discloses that the outer edge of the outer blade made of a synthetic resin is covered with a synthetic resin comb in order to prevent the metal outer blade from coming into direct contact with the nostril and to damage the nostril mucosa. Yes. In other words, the edge of the outer groove (slit) of the outer blade is slightly projected into the groove width of the groove of the comb. However, although there is no disclosure about the manufacturing method of the metal outer blade here, it is considered that it is manufactured by the above-described normal method.

Japanese Patent No. 2598466

  The reason why a relatively thick metal plate is used in the manufacturing method shown in FIG. 9 is that when a long hole that becomes a slit is first processed with a rotary cutter (step S206), it is necessary that the fixing strength of the slit processing surface be high. is there. For this reason, it is necessary to make the metal plate thick with sufficient strength and rigidity.

  For this reason, it is necessary to use a material that can be squeezed even if it is thick, for example, a soft material having a Vickers strength (HV) of 200 or less or a material having a large elongation. As a result, a heat treatment for increasing the strength and rigidity is required before the slit grooving (step S104), resulting in a problem that the manufacturing process increases. For manufacturing the outer blade, various other methods are conceivable. For example, electric discharge machining, ECM (electro-chemical machining) or the like may be used instead of slit grooving. There is a problem that processing is complicated and efficiency is low.

  As described above, in the conventional manufacturing method, since it is necessary to thicken the metal plate, it is necessary to use such a soft and highly stretchable material that can be drawn, and in order to machine a slit with a rotary cutter on the drawn workpiece. However, it was necessary to perform heat treatment so as to have rigidity and hardness suitable for processing. When a rotary cutter is used for slit processing, the slit can be processed only in a straight line, and it is also necessary to perform deburring after the slit processing. Although it is conceivable to use ECM, electric discharge machining or the like for the slit machining, a special apparatus is required and productivity is lowered. For this reason, there has been a problem that the manufacturing process becomes complicated and the productivity deteriorates.

The present invention has been made in view of such circumstances, and it is not necessary to use troublesome machining methods such as ECM and electric discharge machining, so that the productivity can be greatly improved, and the slit machining shape is limited to a linear shape. An object of the present invention is to provide a method for manufacturing an outer blade of a nose hair cutter that can increase the degree of freedom in designing a slit shape without being done.

Nose this purpose, according to the present invention, the slits extending axially from the distal end portion of the cylindrical outer cutter is formed, for cutting the inner cutter rotating the nose hair entering the slit in contact with the inner surface of said outer cutter In the manufacturing method of the outer blade used for the cutter,
a) A long hole serving as the slit is radially processed in a flat metal thin plate;
b) processing the outer cutter inner having a slit extending in the axial direction from the tip by drawing the metal sheet;
c) quenching the outer cutter inner;
d) The outer cutter inner is inserted inside the outer outer blade made of resin in which a slit-shaped opening slightly wider in the circumferential direction than the slit of the outer cutter inner is formed, and the inner edge of the slit of the outer cutter inner Integrating the outer cutter outer and the outer cutter inner so as to slightly protrude into the opening of the outer cutter outer;
This is achieved by a method for manufacturing an outer blade of a nose hair cutter, characterized by having the above steps.

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  After forming a long hole to be a slit in the metal plate in advance by press punching or the like, the processed metal plate is processed into a substantially cylindrical shape (including a truncated cone shape) by drawing, There is no need to use a thick metal material (metal plate), and the generation of burrs associated with slitting is eliminated (or slightly reduced), making deburring unnecessary or simple, reducing the number of manufacturing processes and improving productivity. Can be made. In other words, as in the conventional method, when the slit is cut after the metal plate is press-drawn, the metal plate is thickened to suppress the occurrence of burrs so that the workpiece can be firmly held for the slit processing. It is because it is necessary to heat-process for this.

  In addition, according to the present invention, since a thin material can be used from the beginning, drawing workability is good, and it is not always necessary to use a thick material that is soft and has good elongation. Productivity can be greatly improved. Moreover, since a rotary cutter is not used for slit processing, generation of burrs is suppressed, and in some cases, deburring processing can be omitted. In particular, since the long hole that becomes the slit is processed and then drawn, even if some burrs are generated during the processing of the long holes, this burr can be removed during the drawing process by the press, so the deburring process is virtually unnecessary. is there. Furthermore, it is not necessary to limit the slit processing shape to a linear shape, and the degree of freedom in designing the shaving surface can be increased. Furthermore, since a thin material is used, it is suitable for reducing the weight of the outer blade.

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The top view (A), front view (B), and bottom view (C) of the outer blade which is one Example of this invention II-II line sectional view in the same front view (B) Similarly, an enlarged cross-sectional view of the outer blade tip in FIG. Similarly, a cross-sectional view taken along line IV-IV in FIG. Similarly, an exploded perspective view of the outer blade Diagram showing outer blade manufacturing process Plan view (A) and front view (B) of conventional outer cutter It is the VIII-VIII sectional view taken on the line of the front view (B) in FIG. The figure which shows the manufacturing process of the conventional outer blade

    If the thickness of the flat metal thin plate is made sufficiently smaller than the width of the long hole serving as the slit, the long hole can be processed easily and can be cleaned without generating burrs (Claim 2). For example, the thickness of the thin metal plate can be 0.1 mm, and the slit width can be 0.7 mm. The long hole can be processed by, for example, press punching. In this case, the workability is good and the productivity is remarkably improved (claim 3). The long hole can be processed by etching instead of press punching. In this case, the productivity can be improved by thinning the metal plate. The long hole of the slit may be processed by laser processing. In either case, an ECM or an electric discharge machining apparatus is unnecessary, so that the manufacturing process is simplified.

In the step a), the central disk portion of the thin metal plate is left in the center of the radial long hole, and in the step b), a long hole serving as a slit surrounding the central disk portion can be formed radially (Claim 5). . In this case, since the central disk portion blocks the slit tip of the outer blade inner, the slit does not open at the tip of the outer blade, and the open end of the slit may be exposed at the tip and damage the nostril mucosa. There is no .

  In step b), when the outer blade inner is drawn into a substantially truncated cone shape in which the outer diameter gradually increases from the tip portion toward the other end portion, it becomes a shallow drawing and causes wrinkles due to drawing. This can be prevented and the product yield is improved (claim 6).

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    The long hole to be the slit may be formed in a straight line, but the width can be changed or the curve can be bent by appropriately setting the shape of the press die. When etching is used instead of press punching, an etching resist pattern formed on the surface of the thin metal plate may be appropriately determined.

  1-5, the code | symbol 10 is an outer blade inner and 12 is an outer blade outer. As is apparent from FIG. 5, the outer blade inner 10 is obtained by drawing a thin metal plate such as SUS (stainless steel) into a substantially cylindrical shape, and radiates in the axial direction from around the central disk portion 14 provided at the center of the tip. Six slits 16 extending in the direction are formed. Further, a flange portion 18 protruding in the outer diameter direction is formed on the opposite end side (the other end side, the base side). The outer blade inner 10 is processed into a tapered shape (conical surface shape) whose outer diameter gradually decreases toward the tip.

  Next, a method for manufacturing the outer cutter inner 10 will be described. First, a thin metal plate such as SUS is prepared (step S100 in FIG. 9), and a plurality of (six) long holes are processed by, for example, press punching processing around the central disk portion 14 (step S102). Etching or laser processing may be used instead of press punching. And this metal thin plate is press-drawn to form the outer cutter inner 10 shown in FIG. 5 (step S104). At this time, the flange portion 18 is also formed at the same time.

  By this press drawing, even if some burrs are generated during the punching of the long hole, the burrs can be removed. Since the metal plate is thin, for example, by making it a plate having a thickness sufficiently smaller than the width dimension of the slit 16, it is possible to improve the punching workability of the long hole and the cylindrical drawing workability and to easily improve the processing accuracy. .

  Thereafter, the strength is increased by quenching (step S106). By this quenching, the durability of the outer blade inner 10 can be improved and the sharpness can be improved. The outer cutter inner 10 is inserted and fixed to the outer cutter outer 12 shown in FIG. 5 from below (step S108).

  The outer cutter outer 12 is formed integrally with an outer cutter base 20 formed in a substantially conical shape with resin. That is, the outer blade base 20 is integrally formed so as to protrude upward from the upper end surface in a substantially cylindrical shape. The outer cutter outer 12 which is this cylindrical portion is reduced in diameter toward the tip so as to be in close contact with the outer shape of the outer cutter inner 10, and the edge 16A of the slit 16 is slightly at the tip. An opening 12A that is slightly wider in the circumferential direction than the opening width of the slit 16 is formed in a comb blade shape so as to protrude. The edge portion 16A serves as a blade that cuts the nose hair that has entered the slit 16 in cooperation with the inner blade.

  The outer cutter inner 10 is inserted from below the outer cutter case 20 and is loaded and fixed to the outer cutter outer 12 from below. At this time, the edge 16 </ b> A of the slit 16 is fixed at a position slightly protruding into the opening 12 </ b> A of the outer blade outer 12. That is, as shown in FIG. 1C, three caulking bosses 20 </ b> A project from the inner surface of the outer cutter case 20 at equal intervals in the circumferential direction, and these are arranged on the outer periphery of the flange portion 18 of the outer cutter inner 10. It is engaged with three of the six recesses 18A formed. In this state, the outer blade inner 10 is positioned and fixed to the outer blade outer 12 by caulking the boss 20A.

  In addition, ribs 20B for fixing the inner blade height projecting from the outer blade case 20 pass through the other three recesses 18A formed in the flange portion 18 of the outer blade inner 10 and protrude downward. A height setting flange (not shown) provided on the inner blade (not shown) is in sliding contact with the lower surface of these ribs 20B to position the inner blade in the height direction. That is, the inner blade is rotationally driven by the motor and elastically supported upward, and the positioning in the height direction is set by the rib 20B.

DESCRIPTION OF SYMBOLS 10 Outer blade inner 12 Outer blade outer 12A Opening 14 Center disc part 16 Slit 16A Edge (blade)
18 Flange part 20 Outer blade case

Claims (6)

In a manufacturing method of an outer blade used in a nose hair cutter, in which a slit extending in the axial direction is formed from the tip of a cylindrical outer blade, and the nose hair entering the slit is cut by an inner blade rotating in contact with the inner surface of the outer blade ,
a) A long hole serving as the slit is radially processed in a flat metal thin plate;
b) processing the outer cutter inner having a slit extending in the axial direction from the tip by drawing the metal sheet;
c) quenching the outer cutter inner;
d) The outer cutter inner is inserted inside the outer outer blade made of resin in which a slit-shaped opening slightly wider in the circumferential direction than the slit of the outer cutter inner is formed, and the inner edge of the slit of the outer cutter inner Integrating the outer cutter outer and the outer cutter inner so as to slightly protrude into the opening of the outer cutter outer;
A method for manufacturing an outer blade of a nose hair cutter, comprising the above steps.   The thickness of a flat metal thin plate is the outer blade manufacturing method of the nose hair cutter of Claim 1 smaller than the width | variety of the long hole used as a slit.   In the process a), the outer blade manufacturing method of the nose hair cutter of Claim 2 which forms the long hole used as a slit by press punching.   In the process a), the outer blade manufacturing method of the nose hair cutter of Claim 1 which forms the long hole used as a slit by an etching.   2. The outer blade processing method for a nose hair cutter according to claim 1, wherein in step a), a central disc portion of a thin metal plate is left at the center of the radial slot, and in step b), slits surrounding the central disc portion are formed radially. .   In the process b), the outer cutter inner blade manufacturing method of the nasal hair cutter according to claim 1, wherein the outer cutter inner is drawn into a substantially conical shape in which the outer diameter gradually increases from the tip portion toward the base portion on the other end side.

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