WO2008051109A1 - Razor - Google Patents

Abstract

The invention relates to domestic appliances and is used for removing hair from the facial skin or from the human body by means of wet shaving. The invention makes it possible to extend a range of shaving systems and to provide a quality and friendly removal of hair from the human skin during wet shaving by means of the optimally positioned cutting edges of a razor cartridge with respect to the treatable surface and to extend the service life of the cutting edges of the razor cartridge blades by reducing cutting force. The razor comprises an interchangeable razor cartridge (1), a handle (2) and a connecting element (3) for providing an interaction between the razor cartridge and the handle. The razor cartridge comprises a pivotable body (4), a cover (5) and a safety surface (6), wherein said pivotable body is provided with elements which are used for fastening blades (7) and are embodied in the form of slots, the longitudinal axes of which are arranged at an angle to the longitudinal sides of the body on which they are mounted. The blades (7) are arranged at an angle to a vertical plane passing though the longitudinal axis of the handle (2), i.e. at an angle to the direction of shaving.

Description

 Razor

FIELD OF TECHNOLOGY

The invention relates to household appliances and is used to remove hair from the skin of a person or body during a wet shave.

BACKGROUND OF THE INVENTION In the literature and technology, various designs of shaving systems for wet shaving are widely known. A known design of a razor device which comprises a shaving unit with one or more blades mounted on a handle and holder, the longitudinal axis of the shaving unit or the shaving edge of the blade being at an angle to a plane perpendicular to the longitudinal axis of the handle, which is up to 45 ° in both directions, and the shaving unit is fixed with the possibility of rotation in the frontal plane on both sides of the plane perpendicular to the longitudinal axis of the handle, and fixation in an inclined position (Application RU JN ° 2002122368, IPC 7 B23B21 / 28; 2004).

Designs of this type during their operation allows you to change the angle of inclination of the shaving unit and, accordingly, the blade. This improves the quality of shaving of rounded areas of the face, for example, the chin, but can cause unpleasant subjective sensations, and also contributes to the rapid blunting of the blades since the hair cutting force is directed perpendicular to the cutting edges of the blades.

To reduce the resistance of cutting hair from the skin and increase the comfort of the user in the process of wet shaving, there are known solutions aimed at improving the attachment point of the replaceable cartridge to the handle of the razor system, as well as solutions aimed at improving the shape of the blades with cutting edges and their location relative to each other.

For example, a razor system is known in which the inclined blades with one lower end are fixed in the holder by means of an elastic element made in the form of a base of elastic material, which allows the blades to deviate from their original position and, if necessary, independently occupy any optimal position at an increased angle of inclination . (Patent RU M 2174903, IPC B26B 21/22, 2001).

A known design of a shaving system, including a skeleton with a correcting structure, a protective element with a knife structure and an element of a shaving aid, which includes a coaxially arranged distribution head, a neck section and a fixing part, as well as an additional cantilever section located between the distribution head and the neck section and having a cross-sectional width increasing along the longitudinal axis. The shaving aid during shaving is released from the corresponding element with each pass of the shaving system. During each pass, the razor system rotates as a unit on the handle, following the contour of the shaved skin surface (patent RU JNb 2108233, IPC B26B 21/44, 1998).

Known razor unit containing a blade and a stationary interacting with the skin element of a polymeric material located near the blade, this element contains an elongated shell with a skin interacting surface located along the outer surface of the shell, and the inner part passing axially through the entire shell, this shell contains polyethylene oxide and a water-insoluble matrix, and interacting with the skin the element contains a water-insoluble polymer (Patent RU N ° 2203799, MPK B26B 21/44, 1999).

Closest to the proposed one is a razor system containing a replaceable razor cartridge mounted on a handle, a cartridge rotatable housing, a connecting element, a fuse and a cover, the housing is equipped with elements for attaching one or more blades and has a cam surface, the connecting element has a rotary support device, which holds the housing rotatably and the central base having a recess and an opening therein facing the cam surface, the handle has a support device Cartridge is conjugate with the recess and a spring-loaded plunger (Patent RU N ° 2,214,903, B21B26 / 14 IPC, 2003).

Known designs provide good shaving ability, however, do not fully solve the problem of improving the comfort of shaving and increasing the life of the cartridge blades. In our opinion, this is due to the fact that the location of the cutting edges of the blades parallel to the longitudinal side of the body determines their position perpendicular to the movement of the razor, which causes chopping of the hairs with considerable force applied to the cut hairs. This, on the one hand, leads to rapid wear of the blades and requires replacement of the cartridge, on the other hand, cutting off the hairs causes discomfort when shaving, especially in people with sensitive skin. The device rotates the body relative to the axis perpendicular to the handle of the razor system, allows you to change the angle at which the cutting edge of the blade, perpendicular to the direction of movement of the razor, cuts the hair, which allows you to somewhat reduce discomfort, however, it is not possible to completely replace the process of cutting hairs by cutting them. SUMMARY OF THE INVENTION

The objective of the invention is to expand the range of razor systems for wet shaving while improving shaving comfort and increasing the life of replaceable cartridges.

The problem is solved in that in a razor containing a replaceable razor cartridge, a handle and a connecting element, the razor cartridge contains a rotary body, a cover and a safety surface, the rotary body is provided with elements for attaching blades with cutting edges, while the blades are mounted at an angle to the vertical plane passing through the longitudinal axis of the handle, and, therefore, at an angle to the direction of shaving, and the fastening elements of the blades are located on the longitudinal sides of the body at an angle to them. The blades are mounted parallel to each other with a step that ensures that each successive blade overlaps the horizontal projection of the previous blade. The blades are mounted in pairs at an angle to each other, with the top of the corner facing the handle. Installing the blades at an angle to the vertical plane passing through the longitudinal axis of the handle means that the blades are mounted at an angle to the longitudinal sides of the razor cartridge with a rotatable housing. In the rotary housing, grooves are made for rigid fastening of the blades, excluding their deformation along the longitudinal axis. On top of the blade fastening elements along the longitudinal side of the rotary body, pads can be installed to help achieve an additional result - skin tightening during shaving and improved razor glide on the skin surface.

As noted above, in previously known designs, the ability to create a comfortable shave was not fully provided. AT of the proposed design, the process of cutting off the hairs is replaced by the process of cutting them. Cutting of hairs is ensured by the fact that the blades are located at an angle to the vertical plane passing through the longitudinal axis of the handle, and, therefore, at an angle to the direction of shaving. As you know, the reaction of the support, which is the hair when shaving, is calculated by the formula: F ₀ = F x cos Y, where: F ₀ - reaction force of the support;

F is the force applied when shaving; Y is the angle of inclination of the force vector applied to the hair to the support reaction force vector.

The inventive design of the razor due to the location of the blades in the razor cartridge allows for a minimum value of cos Y, and, therefore, with the same force applied during shaving, it can reduce the reaction force of the support, i.e. shaving force of the hair. Thus, the claimed design allows high-quality shaving with less effort applied to the hairs, and, therefore, eliminates unpleasant sensations when shaving. In addition, this arrangement of blades can reduce their wear and increase the useful life of the razor cartridge.

The location of the blade attachment elements on the longitudinal sides of the body at an angle to them allows you to position the blade at an angle to the direction of shaving, while providing an angle of inclination of up to 45 °, which reduces the force applied to the hairs during shaving by up to 50%. The location of the blades with a step that ensures that each successive blade overlaps the horizontal projection of the previous blade allows for complete overlap of the shaving line, which ensures a clean and high-quality shave.

The symmetrical arrangement of the blades relative to the longitudinal axis of the handle with an angle between them, the apex of which faces the handle, increases the comfort and quality of shaving by additional angular stretching of the skin, and also increases the safety of shaving.

BEST MODES FOR CARRYING OUT THE INVENTION A specific embodiment of the inventive razor is described below with reference to the accompanying drawings.

Figure 1 schematically shows a General view of the razor.

The razor contains a replaceable razor cartridge 1, a handle 2 and a connecting element 3, the razor cartridge contains a rotary body 4, a cover 5 and a safety surface 6, while the rotary body 4 is provided with elements for attaching the blades 7, made in the form of grooves, the longitudinal axes of which are located under angle to the longitudinal sides of the housing on which they are located (not shown in the drawing). The connecting element 3 is made in the form of a trapezoidal protrusion (not shown in the drawing) located on the handle 2 and interacting with a groove corresponding to the connecting profile element (not shown in the drawing) located at the base of the cartridge 1. The connecting element 3. providing a strong mutual connection of the cartridge 1 and the handle 2, is formed by a molding method compatible with the manufacture of other razor parts made, like the connecting element 3, from high impact polystyrene. The blades 7 are installed at an angle to a vertical plane that resembles the axis of the handle, and, therefore, at an angle to the direction of shaving. The angle of inclination of the blades is selected based on the location of the blades, their number and dimensions of the housing 4. In the embodiment, when the blades are parallel to each other and mounted on the longitudinal sides of the housing 4 with overlapping horizontal projections, the angle of inclination of the blades to the longitudinal side of the housing 4 is 30 ° -45 °. With this arrangement of blades, the task is carried out in full, namely the process cutting of hairs is replaced by cutting them with a minimum force applied by the blade 7 to the hair and the required safety and quality of shaving is ensured. In the embodiment, when the blades are arranged in pairs symmetrically to each other with an angle between them directed toward the handle, the angle of inclination of the blades to the longitudinal side of the housing 4 is 40 ° -45 °.

The rotation of the housing 4 is carried out using any known means (not shown in the drawing), for example, a rotary support device interacting with the cam surface of the housing 4, as, for example, described in the prototype.

When using a razor, the same movements are performed as well-known razors.

INDUSTRIAL APPLICABILITY

The inventive razor allows for high-quality and comfortable hair removal from human skin during wet shaving due to the optimal location of the cutting edges of the razor blade blades relative to the surface being treated, as well as to extend the service life of the cutting edges of the blades by reducing the cutting force.

The inventive razor can be made in industry from known materials on known equipment. One of the possible industrial applications is the serial industrial production of replaceable shaving cartridges for use in previously known designs of shaving systems.

Claims

CLAIM 1. A razor comprising a replaceable razor cartridge, a handle and a connecting element, a razor cartridge comprises a rotary body, a cover and a safety surface, and the rotary body is provided with elements for attaching blades with cutting edges, characterized in that the blades are mounted at an angle to a vertical plane passing through the longitudinal axis of the handle, and the fastening elements of the blades are located on the longitudinal sides of the body at an angle to them. 2 .. The razor according to claim 1, characterized in that the blades are mounted parallel to each other with a step that ensures that each successive blade overlaps the horizontal projection of the previous blade. 3. The razor according to claim 1, characterized in that the blades are mounted in pairs at an angle to each other, the apex of which is turned towards the handle. 4. The razor according to claim 1, characterized in that the fastening elements of the blades are made in the form of grooves, providing a rigid fastening of the blades.