EP0389007A1 - Wet shaver - Google Patents

Abstract

In a wet shaver (10), a razor blade (7) is firmly embedded in a blade body (6). To increase safety and to improve the shaving properties, wire (15) is wound around the blade body (6) together with the razor blade (7). Areas of application are disposable wet shavers in which the shaver head is formed in one piece with the handle, so- called razor-blade units which can be arranged exchangeably on the front end of a handle (1), so-called turret head wet shavers whose blade holder (6) is provided with a wire winding, and also conventional razor blades. <IMAGE>

Description

The invention relates to a wet shaver in which a razor blade is firmly embedded in a blade body.

Wet razors are known in which a single razor blade or a double razor blade is embedded in a plastic body, the cutting edges of the two razor blades being offset from one another in the double razor blade. A distinction is made between two types, namely a wet razor, in which the razor head is formed in one piece with the handle, and second, the so-called razor blade units, which are formed separately from the handle and can be interchangeably attached to the handle by means of a corresponding mechanism.

A disadvantage of these wet shavers is that unevenness in the skin can be detected by the razor blades during the shaving process and can thus be the cause of skin injuries (skin irritation) that are sometimes not visible. In addition, in the known wet shaver there is a risk that the user may be injured if the cutting edge of the razor blade is touched unintentionally.

Based on this, the object of the invention is to further develop the known wet shaving apparatus of the type mentioned at the outset, in which a razor blade is firmly embedded in a blade body, in such a way that the shaving properties are improved with an increase in safety.

As a technical solution , the invention proposes that the blade body is wrapped with wire together with the razor blade.

The wire wrapping ensures very good protection against injuries if the cutting edge is touched unintentionally or if a misfortune happens to the user during shaving, which would otherwise lead to a cut injury without the wire wrapping. In addition, the wire wrap significantly improves the shaving properties of the wet shaver. The wire prevents the formation of a skin fold, so that skin injuries are avoided even in the invisible area. The wire also reduces shaving resistance. Such a wire wrap can be used both for wet shavers, the razor head with the razor blade embedded therein is formed in one piece with the handle, as well as for the so-called razor blade units, which can be exchangeably attached to the front end of a handle as separate components with a razor blade embedded in a blade body .

The wire is preferably a metal wire and can consist of copper, silver or stainless steel. Instead of the metal wire, the wire can also be a plastic fiber and is in particular a polyamide, polyethylene, polystyrene, vinylidene-vinyl chloride copolymer, acrynitrile copolymer, rubber-elastic polyurethane or polyerephthalic acid ester.

In a further preferred embodiment, the wire can be provided with a coating which reduces friction and serves as a lubricant. This coating can consist in particular of a water-soluble polymer, in particular polyethylene oxide, polyvinyl pyrrolidone, methyl cellulose or polyvinyl methylene ether. Instead of the water-soluble polymer the coating can also consist of a water-absorbing but not water-soluble material, for example of polyvinyl alcohol fibers or PUR-polyvinyl interpolymer. The use of such a lubricant to reduce the friction of the wires ensures that they slide over the skin of the user without resistance during shaving and thus do not impair the shaving process. When using a water-soluble polymer as a lubricant, the adhesion and the cohesion of this water-soluble polymer must be adjusted so that water and pressure must come together for the detachment. The water is used to release the water-soluble polymer, while the pressure ensures the necessary abrasion and thus realizes the lubrication.

The wire preferably has a diameter of less than 0.1 mm.

In order to hold the wire securely in position, it is proposed according to a further development of the invention that recesses are provided in which the wire runs. Lateral displacement is prevented by guiding the wire in the recesses. The wire can also be glued on.

Furthermore, the invention proposes the use of wire wrapping for the conventional razor blades. Furthermore, the use of the wire wrap for a wet shaver with a single or double razor blades having a razor head which is arranged at the front end of a handle is proposed according to the invention, wherein a plurality of razor blades are arranged uniformly over its circumference on a common blade carrier rotatable about an axis, the Cutting edges of the razor blades run parallel to this axis and the blade carrier with the Razor blades can be rotated into the shaving position and locked there by means of a rotary knob located on the axis and arranged on the blade carrier, the blade carrier being wrapped with wire together with the razor blades. With these types of use, a blade body with an embedded razor blade of the type specified at the outset is no longer assumed, but rather conventional razor blades and a so-called turret razor.

• Fig. 1 eine Ansicht eines sogenannten Revolverkopf-Rasier­apparates;
• Fig. 2 einen Schnitt entlag der Linie II-II in Fig. 1 durch den Rasierkopf;
• Fig. 3 einen Schnitt entlang der Linie III-III in Fig. 2 im Bereich der Verrastung des Klingenträgers;
• Fig. 4 einen Schnitt entlang der Linie IV-IV in Fig. 2 im Bereich der Dreheinrichtung für den Klingenträger;
• Fig. 5 eine Ansicht einer Rasierklinge mit einer Drahtum­wicklung.

Further details, features and advantages result from the following description of the accompanying drawing, in which various embodiments of the invention are shown schematically. The drawing shows:

• Figure 1 is a view of a so-called turret shaver.
• 2 shows a section along the line II-II in FIG. 1 through the razor head;
• 3 shows a section along the line III-III in FIG. 2 in the region of the latching of the blade carrier;
• 4 shows a section along the line IV-IV in FIG. 2 in the region of the rotating device for the blade carrier;
• Fig. 5 is a view of a razor blade with a wire wrap.

The turret shaver shown in Fig. 1 consists of a handle 1 and a shaving head 2, which is arranged at the front end of the handle 1.

On an L-shaped extension 3 of the handle 1, an axis of rotation 4 is mounted extending transversely to the longitudinal extent of the handle 1, this axis of rotation 4 projecting freely, as can be seen in particular in FIG. 2. The handle 1, the continuation 3 and the axis of rotation 4 can be formed in one piece and consist, for example, of plastic or metal. A spring 5 is arranged in the axis of rotation 4 and projects beyond the circumferential surface of the axis of rotation 4 through a slot. This can also be seen in FIG. 2. This spring 5 can be pressed transversely to the longitudinal extent of the axis of rotation 4 into its interior.

A blade carrier 6 (in the drawing from the right) is attached to the axis of rotation 4. This blade carrier 6 has an essentially square cross section, a razor blade 7 in the form of a double razor blade being welded firmly onto each side surface. The cutting edges 8 of the razor blades 7 run parallel to the central axis of rotation 4.

An axis A is defined by the axis of rotation 4, about which the blade carrier 6 can be rotated with the razor blades 7, which is indicated by the arrow D.

To fix the blade carrier 6 on the axis of rotation 4 both in the axial direction of the axis of rotation 4 and in the rotational position, the blade carrier is provided on the inside with a circumferential recess 9 with a square cross section (FIG. 3), as can be seen in FIG. 2. This circumferential recess 9 abuts on the end face of the spring 5 of the axis of rotation 4, so that the blade carrier 6 is thereby fixed in the axial direction. By overcoming the spring force of the spring 5, however, it can be pressed inward into the axis of rotation 4, so that the blade carrier 6 can be pulled off the axis of rotation 4. Accordingly, a new blade carrier 6 can be fixed in position after being pushed onto the axis of rotation 4.

Due to the square cross-sectional shape of the circumferential recess 9, the spring 5 always comes to rest in the corners, so that in addition an angular adjustment of the blade carrier 6 on the axis of rotation 4 is also realized. This latching defines the shaving position of the blade carrier 6 and thus the razor blades 7.

In order to be able to rotate the blade carrier 6 on the axis of rotation 4, a rotating device 10 is provided. This consists of a rotary knob 11 outside the blade carrier 6. This rotary knob 11 lies in the axis A or in the extension of the axis of rotation 4. The rotary knob 11 is provided with an actuating rod 12 which is penetrated through a bore 13 on the end face of the blade carrier 6 protrudes axially. The end of the actuating rod 12 located inside the blade carrier 6 is provided with a stop 14 which has a non-round cross-sectional shape and is square in the exemplary embodiment shown. The inner contour of the blade carrier 6 is adapted to this cross-sectional shape of the stop 14, so that the stop 14 is arranged in the blade carrier 6 such that it cannot rotate.

In the rest position, the rotary knob 11 is in the inserted position (solid line in Fig. 2). If the blade carrier 6 is to be rotated into the next position, the rotary knob 11 is pulled out, which is indicated by the arrow P, the drawn-out position being shown in dashed lines. Due to the non-rotatable arrangement of the stop 14 in the blade carrier 6, the blade carrier 6 can be rotated into the next position of the razor blade 7 by turning the rotary knob 11. When the turning process has ended, the rotary button 11 is pushed in again (from right to left in the drawing).

In Fig. 1 it is indicated that the blade carrier 6 is spirally wrapped by a wire 15, which preferably has a diameter less than 0.1 mm. This wire wrapping serves as protection against injury, the shaving properties of the razor blades 7 being fully retained.

The use of this wire wrap is not limited to the blade carrier 6 in such turret shavers. The wire wrapping is equally applicable to razor blades. In Fig. 5, a single razor blade 7 is shown, which is provided with such a wire wrap. To fix the wire 15, the razor blade 7 (or the blade carrier 6) can be provided with recesses, not shown, in which the wire 15 runs and thus protects it from displacement. In addition, the wire 15 can also be glued, welded or soldered to the razor blade 7. Such a razor blade 7 can then either be embedded in a razor blade unit, as is the case with the so-called disposable razors. Instead, the razor blade 7 can also be replaced as a single piece in a corresponding razor head.

The wire wrapping was described using a so-called turret razor (FIGS. 1 to 4) and a conventional razor blade 7 (FIG. 5). In a preferred, but not shown embodiment, the wire wrapping is provided in a wet shaver in which a single or double razor blade is firmly embedded in a plastic blade body. The blade body can be integrally formed with the handle and thus forms a so-called disposable wet shaver. Instead, it is also conceivable to provide the wire wrapping in a so-called razor blade unit, which can be interchangeably arranged at the front end of a handle of a wet shaving apparatus.

The disclosure of the present application is not limited to the above and the following statements. The disclosure also includes the documents of the European parent application belonging to this divisional application under the application number 87 10 0035.2-2302 and likewise forms the subject of the present application.

Reference symbol list

• 1 handle
• 2 razor heads
• 3 continued
• 4 axis of rotation
• 5 spring
• 6 blade carriers
• 7 razor blade
• 8 cutting edge
• 9 circumferential recess
• 10 rotating device
• 11 rotary knob
• 12 operating rod
• 13 perforation
• 14 stop
• 15 wire
• A axis
• D rotation
• P arrow

Claims (8)

1. wet shaver,
where a razor blade is firmly embedded in a blade body,
characterized,
that the blade body is wrapped with wire together with the razor blade. 2. Shaver according to claim 1, characterized in that the wire is a metal wire, in particular made of copper, silver or stainless steel. 3. Shaver according to claim 1, characterized in that the wire is a plastic fiber, in particular made of a polyamide, polyethylene, polystyrene, vinylidene-vinyl chloride copolymer, acrynitrile copolymer, rubber-elastic polyurethane or polyterephthalic acid ester. 4. Razor according to one of claims 1 to 3, characterized in that the wire with a friction-reducing and serving as a lubricant coating in particular from a water-soluble polymer, in particular polyethylene oxide, polyvinyl pyrrolidone, methyl cellulose or polyvinyl methylene ether, or in particular from a water-absorbing, but not water-soluble material, in particular polyvinyl alcohol fibers or PUR-polyvinyl interpolymer, is provided. 5. Shaver according to one of claims 1 to 4, characterized in that the wire has a diameter less than 0.1 mm. 6. Shaver according to one of claims 1 to 5, characterized in that recesses are provided in which the wire runs. 7. Use of the wire wrap according to one of claims 1 to 6 for razor blades (7). 8. Use of the wire wrap according to one of claims 1 to 6 for a wet shaver with a single or double razor blades (7) having a razor head (2) which is arranged at the front end of a handle (1), wherein a plurality of razor blades (7) on one common blade carrier (6) rotatable about an axis (A) are arranged uniformly over its circumference, the cutting edges (8) of the razor blades (7) running parallel to this axis (A) and the blade carrier (6) with the razor blades ( 7) can be rotated into the shaving position and locked there by means of a rotary knob (11) located in the axis (A) and arranged on the blade carrier (6), the blade carrier (6) together with the razor blades (7) with wire (15) is wrapped.

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