JPS59149172A - Long hair cutter for dry shaver - Google Patents

Abstract

1. A long-hair trimming device for dry shaving apparatus, with a shearing comb (5) fixedly secured to a shearing head frame (1) and with a shearing blade assembly reciprocable longitudinally of said comb in a straight line and being urged thereagainst by means of pressure springs (8), said shearing blade assembly being comprised of a blade (6) and a carrier body (7) resistant to bending, characterized in that the blade (6) is of plane configuration and fixedly secured to the carrier body (7), with at least the teeth (26) having their entire cutting area projecting beyond the carrier body (7), that the blade (6) and the carrier body (7) form a constructional unit resistant to bending, and that the pressure springs (8) bear with their one ends against a support strip (4) provided on the shearing head frame (1) while their other ends rest against the carrier body (7).

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a long hair cutter for a dry shaver, which comprises a shearing comb fixedly disposed on a shearing head frame, and capable of reciprocating linearly along the shearing comb. The shearing comb has a shearing force pressed by a pressure spring against the shearing comb, and this shearing force consists of a support and a blade body.

It is generally difficult to provide a long hair cutter with a blade body manufactured by an electrolytic method or an etching method. The blade body manufactured by such an electrolytic method or an etching method can have an optimal configuration of the cutting edge and can maintain an optimal edge angle, so a particularly good cutting edge can be obtained, and it can be made by the punching method. This has the advantage that the manufacturing cost is lower because the manufacturing process is omitted for the manufactured blade body. In contrast, the punching method requires punching, stamping, hardening, and polishing steps. In addition, the machine tools and tools necessary for this purpose are exposed to wear and must be constantly maintained, but even ignoring the need to use such machine tools and tools, this punching method is sufficient. It is difficult to obtain a blade body with a cutting edge and an edge angle that are free of .

Furthermore, blade bodies manufactured by electrolytic or etching methods have the advantage of being thinner than blade bodies manufactured by punching methods. The thinner the blade body, the better the hair cutting range and the ability to guide longer hair cutting sections! It has the advantage of being possible. However, in the past, thin blade bodies manufactured by the electrolytic method or etching method (particularly electrolytic method) lacked rigidity or bending rigidity over the entire width of the blade body, making it inconvenient to install in long hair cutters. According to Swiss Patent No. 480922, a pivotable long hair with a spring-elastic folded vibrating thin blade body and a stationary shearing comb embedded in a support. Cutters are known. However, a spring-elastic blade body having such a shape cannot be manufactured by either an electrolytic method or an etching method, and therefore it is not possible to obtain an optimum cutting edge and edge angle.

US Pat. No. 3,909,938 discloses a pivotable long hair cutter with a blade body that is embedded or riveted to a support. This support is fixedly journalled and the bearing is movably journalled. The blade body, which projects relatively largely from the support, projects into a U-shaped spring-elastic shearing comb. The strain of the blade body protruding from the support is certainly accommodated by the U-shaped shearing comb that surrounds the blade body, but the blade body does not rest continuously against the active cutting edge; In addition, the guided hair is torn or torn off in this area rather than being cut.

DE 201.9978 discloses a long hair cutter consisting of a shearing comb made by stamping and a blade body also made by stamping. In this known long hair cutter, a stationary shearing comb is fixed to a support, and a vibrating blade body with a large bending rigidity is pressed against the shearing comb by a pressure spring provided between the support and the blade body. It is being

Still, Federal Republic of Germany Patent Application No. 2836959
According to the specification, between the shearing head frame and the blade body with high bending rigidity that comes into contact with the immovable shearing comb,
A two-armed lever is provided to divide the spring force of the pressure spring. One end of the lever is supported by the shear head frame and the other end is supported by the blade body.

Furthermore, the Federal Republic of Germany Patent Application No. 303191
In the long hair cutter according to Specification No. 8, an angled blade body with high bending rigidity is fixed via a support member capable of reciprocating movement, and a pressing spring that directly acts on the blade body is immovable. It is configured to be movable while contacting the shearing comb at right angles. This pin only prevents lateral movement of the blade body on the support.

All of the above-mentioned known long hair cutters have to be constructed with a special construction, in particular the shape of the blade body or the desired elastic properties or the type of compression of the pressure spring against the blade body, so that electrolytic or etching methods are required. None of them are suitable for use with blade bodies manufactured by the law.

SUMMARY OF THE INVENTION An object of the present invention is, in order to take advantage of the above-mentioned advantages of a blade body manufactured by an electrolytic method or an etching method, to provide an initial method in which a blade body manufactured by an electrolytic method or an etching method can be used. An object of the present invention is to provide a long hair cutter of the type described above.

The present invention solves this problem in that the blade body is arranged flatly and immovably on a support, and the blade body and the support constitute a structural unit with high bending rigidity. One end of the pressing spring is fixed to the casing, and the other end is in contact with the support. The rigidity of the support can be increased by fixing the blade body to a support, which is preferably made of an injection-molded synthetic resin and is provided with projections that engage in corresponding recesses in the blade body. This is transmitted to the thin blade body, such that the blade body and the support form a structural unit with high bending rigidity. According to such a structural unit with high bending rigidity obtained by the structure of the present invention, it is possible to use a blade body manufactured by an electrolytic method or an etching method, and furthermore, it is possible to use a blade body manufactured by an electrolytic method or an etching method. It is possible to take advantage of the advantages of a blade body manufactured by the method.

According to K., such structural units with high bending rigidity:
On the side of the immovably arranged shearing comb that rests against the blade body, it is possible to provide a sliding surface in order to reduce the friction of the two surfaces sliding against each other.

The oscillating movement of the drive lever is transmitted via a drive pin to a fork configured as a coupling member. This fork can be integrally molded onto the support or the blade body and, in the active state, causes the structural unit to move in an oscillating manner.

A cutout for receiving a pressure spring is provided on the side of the support opposite to the blade body. On the one hand, this cutout facilitates the mounting of the support and the pressure spring in the shear head frame, and on the other hand, it serves to distribute the pressure of the shear force against the shear comb evenly over the entire width of the structural unit. The location and pressure point of the spring can be defined.

The shearing force and thus the position of the support are fixed by means of pressure springs on the support strips in the casing wall of the shear head frame and by abutment against the casing wall of the shear head frame as well as on the support. By abutting the blade body against the shearing comb, it is defined and secured on three inside sides. In order to avoid displacement of the shear force or support towards the opening fourth side, the shear force or support is slidably held in a position defined by one or more guide strips. ing. This guide strip is preferably part of the shear head frame and is fixed to the inner wall of the shear head frame.

Next, the configuration of the present invention will be specifically explained with reference to the embodiments shown in the drawings.

In FIG. 1, the shear head frame of the dry shaver is designated by the reference numeral 1, the casing wall shown broken away is designated by the reference numeral 2, and the side wall is designated by the reference numeral 3.

On the inner wall of the casing wall 2 there is provided a longitudinally extending support strip 4.
is integrally molded.

This long hair cutter has a shearing force consisting of an immovable shearing comb 5, a blade body 6 and a support 7, a pressure spring 8 supported on the support strip 4, and a fork 9 integrally molded on the support 7. It consists of

The illustrated long hair cutter is shown in its operating state. integrally molded drive bin 11 of movable drive lever 10;
is arranged in the U-shaped notch of the fork 9, and transmits the vibration movement of the switched-on drive lever 10 to the blade body 6.
and the support 7. When the drive lever 10 is moved in the direction of arrow B, the drive bin 11
is released from the fork 9, thereby stopping the long hair cutter from operating.

The shearing foil 12 is held in a known manner in the shearing head frame 1, whereas the stationary shearing comb 5 is fastened by screws or rivets 13 to projections 14 on the shearing head frame l. Since the casing wall 2 of the shear head frame ends just below the movable blade body 6, a narrow gap 7627 is formed between this casing wall 2 and the blade body 6, through which gap 27 the blade body 6 and the support can be connected. The entire width of the body 7 can be seen.

Through the part of the casing wall 2 shown broken away, a drive lever 10 with a drive pin 11, a fork 9 and a support 7 are inserted.
, two pressure springs 8 and a guide strip 15 are shown.

The pressure spring 8 is attached to the casing wall 2 of the shear head frame.
One end is supported by a support strip located inside the support strip 1, and the other end projects into a recess 16 provided in the support body 7. This recess 16 defines the position and the pressure point of the pressure spring 8 in the support 7 and is also used to guide these interlocking structural parts and to facilitate assembly. Advantageously, the support 7 has four
Four notches 16 are provided, and the illustrated long hair cutter is provided with four pressure springs 8.

The guide strip 15 is used to hold the support 7 in its sliding position, ie to prevent it from moving in the direction of the arrow A in FIG.

In the cutaway part of the drawing, only the right-hand part of the carrier 7 with the guide strip 15 and the two pressure springs 8 is shown, but the left-hand part is also constructed in the same way.

A groove 17 is provided in the support 7 above the fork 9, and within this groove 17 is provided a convex portion 18 for holding the blade body 6.

Furthermore, two protrusions 1 (J, 20) for fixing the blade body 6 to the support 7 are shown in FIG. Although it is sufficient and ideal for the blade body, a two-point fixing type or a three-point or more fixing type may be used.Convex portion 18,
The shapes of 19° and 20 are, for example, square, rectangular, or circular shapes, and they may all have the same shape or may have different shapes. Convex portions 18, 19.20
A receiving through hole 21.22.2 is provided in the blade body 6 in accordance with the shape of the blade body 6.
3 is provided. In this case, these protrusions and the receiving through hole engage with each other with play. The blade body 6 is pressed against the support body 7 via the convex portion, and the entire back side of the blade body 6 is in contact with the support body.

In order to avoid friction between the blade body 6 and the shearing comb 5, the blade body 6 has a sliding surface 24, 25 on the side opposite the support 7. Only this sliding surface 24,25 slides on the stationary shear comb 5. The sliding surface 24 is configured to be narrower than the width of the sliding surface 25, and the sliding surface 25 is configured to have a wider width than the sliding surface 24. .22.23 is surrounded. The thickness of the blade body 6 is slightly thinner in the range between the sliding surfaces 24 and 25. This thin area can be obtained without additional costs during production by electrolytic or etching methods.

FIG. 4 shows a cross-sectional view of the shearing force formed by the support 7 and the blade body 6 shown in FIG. 3 along the line C--C. The blade body 6 is slightly thicker in the area of the sliding surfaces 24 and 25. The support body 7 is injection molded from synthetic resin.
Convex portions 18, 19, 20 and a fork 9 are integrally formed on this support 7 as a connecting member. fork 9
may be integrally molded on the blade body 6. The blade body 6, which has a low shape stability, is connected to a shape stable support 7 which, together with this support 7, has a uniform shape stability and a greater bending rigidity than the support 7. forming a structural unit.

The teeth 26 of the blade body 6 project outwardly beyond the outer contour of the support 7 at least over the entire cutting area. Blade body 6
Since the end opposite to the teeth 26 is sufficiently rigid,
It may also protrude beyond the outer contour of the support 7.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of the range of the shearing head frame of a dry shaver equipped with a long hair cutter according to an embodiment of the present invention, and FIG. FIG. 3 is a plan view of the shearing force portion viewed from the direction of arrow B in FIG. 1, and FIG. 4 is a sectional view taken along line C--C in FIG. 3. DESCRIPTION OF SYMBOLS 1... Shearing head frame, 2... Casing wall, 3... Side wall, 4... Support strip, 5... Shearing comb, 6... Blade body, 7... Support body, 8 ... Pressure spring, 9... Fork, 10... Drive lever, 11.
... Drive bin, 12 ... Shear foil, 13 ...
Screw or rivet, 14...Protrusion, 15...Guide strip, 16...Notch, 17...Groove, 18,19.
20. Convex portion, 21.22.23... Reception through hole, 2
4.25...Sliding surface, 26...Teeth, 27...Gap. (1 other person) FIG, 3 FIG, 4

Claims (1)

[Scope of Claims] 1. A long hair cutter for Dry Scieno 9-, comprising a shearing comb fixedly disposed on a shearing head frame, and a shearing comb capable of reciprocating linearly along the shearing comb. In the case of a type in which the shear force is pressed against the support body by a pressing spring, and the shear force consists of a support body and a blade body, the blade body (6) is placed on the support body (7). The blade body (6) and the support (7) constitute a structural unit with high bending rigidity, and the pressure spring ( 8) A long hair cutter for dry hair, characterized in that one end is fixed to the casing and the other end is in contact with the support (7). 2. The blade body (6) is constructed thinner than the immovable anti-shear comb (5) and cooperates with the support (7) to constitute a structural unit with high bending rigidity. A long hair cutter as described in Scope 1. 3. The support body (7) is attached to the straight line (26) of the blade body (6).
) The long hair cutter according to claim 1, wherein the long hair cutter is located in close proximity to the hair clipper. 4. The long hair cutter according to any one of claims 1 to 3, wherein the blade body (6) has sliding surfaces (24, 25). 5. The blade body (6) has a receiving through hole (21, 22, 2
3), the long hair cutter according to any one of claims 1 to 4. 6. Any one of claims 1 to 5, wherein a convex portion (18, 19, 20) for holding the blade body (6) is integrally molded on the support body (7). or the long hair cutter described in item 1. 7. The fork (9) as a connecting member is integrally molded on the support (7) or the blade body (6), according to any one of claims 1 to 6. long hair cutter. 8. The long hair according to any one of claims 1 to 7, wherein the support (7) is provided with a notch (16) for receiving the pressure spring (8). Cutter. 9 the pressure spring (8) is supported by a support strip (4) provided on the shear head frame (1);
A long hair cutter according to any one of claims 1 to 8. 10. Long hair cutter according to any one of claims 1 to 9, wherein the support (7) is slidably held by one or more guide strips (15). . 11. Long hair according to claim 10, wherein the guide strip (15) is constructed as part of the shearing head frame (1) or is fixed to the shearing head frame (1) with. Cutter.