CS9100834A2 - Head for safety razor - Google Patents

Abstract

A safety razor head comprises a head frame (101) carrying a cap member (104) and two blade units (105) all mounted in slots in end walls (103) of the frame (101) so as to be movable vertically, i.e. towards and away from the base (102) of the frame. The movable elements are urged upwardly by springs (106). The blade units (105) comprise metal pressing (108) of inverted L-shaped cross-section. Blade members (107) are attached to the top limbs (109) and guard portions (111, 112) are spaced forwardly of the blade edges (107A). The pressing (108) has projecting ears (114) at opposite ends by which each unit is mounted in the frame (101) for limited pivotal movement about an axis parallel with and close to the blade edge (107A).

Description

to fit these shavers.

Stav_technjky

SUMMARY OF THE INVENTION The present invention is directed to a problem of providing a razor device with a high degree of "adaptability", i.e. the ability to allow the razor-engaging elements of the skin to optimally contact the transducers to guide the skin contours during shaving or straightness.

The pellets are disposed

According to the invention, the razor blade unit comprises a blade having a sharpened cutting edge and a blade carrier comprising a platform to which the blade is attached with an angularly extending forward direction from the platform, characterized in that it comprises an integral protection portion located at a distance from the platform. forward of the blade, and the support means on which the integral guard and blade are placed in use in the holistic head, for joint rotation about an axis parallel to and adjacent to the blade edge.

The invention also includes a razor comprising a head frame in which at least one such blade unit is mounted for rotation about said axis. Advantageously, the unit or each unit is also capable of being moved relative to the frame in the transverse / ie. substantially perpendicular to the imaginary plane comprising the blade edge and the skin-protecting surface of the skin.

In the following description, the blade unit and the razor head frame of the present invention will be explained in more detail, including some modifications thereof, with reference to the accompanying drawings. EQUIPMENTSoftheFeatures

FIG. 1 is a perspective view of an end portion of the head frame; FIG. 2 is a perspective view of an enlarged portion of the blade unit; FIG. 3 is a cross-sectional view of FIG. 1 showing the blade units and cover member in normal rest positions; 3 and showing parts in different relative positions; FIG. 5 is a schematic sectional view showing the different positions of the housing and the blade units in use; FIG. 6 is an exploded perspective view of the ice on a modified frame. 7 is a cross-sectional view of the head frame of FIG. 6, corresponding to FIG.

Embodiments of the Invention

The razor head shown in FIGS. 1 to 4 comprises a metal frame or molded plastic head frame 1 having a long base and an upwardly extending wall 3 at opposite ends thereof. Only one end of the frame is shown in the figures and the opposite end is a mirror image.

The head frame carries a cover member 4, two blade units 5a, three pairs of beam wire springs 3, the inner not shown ends of which are fixed to the central portion of the longitudinal base. Each blade unit 5 has a sharpened cutter 7A and a blade carrier 8 formed by a metal molding of the L-shaped branch to form a platform 9 and a protective portion securing the curved protective surface 11 of the engaging and protruding legs 12. The carrier has a slot 13 over a predominantly space-forming length thereof between the platform 2a of the protection portion and the blade 7 is rigidly attached to the platform with its edge extending forwardly into the space above the platform. At the end of ch. The lugs 8 are formed in the upwardly displaced protruding lugs, on which they engage with the upwardly extending end portions 6 of the springs 6 from below.

The cover member 4 consists of a U-shaped carrier 1,2 in which a cover member 17 is fastened. The cover member and blade units are retained at their ends in recesses formed in the end walls 3 of the head frame. Specifically, the ear carrier ears 14 are inserted into narrow vertical slots 18 which also receive the vertical end portions 6 of the corresponding wire springs. Along each slot 1.8 there is a smaller and wider recess 1.2, whose front face 21 acts as a stop for the adjacent end of the corresponding leg 12.

Thus, each blade unit is guided with the possibility of vertical movement in the head frame by inserting its lugs 1.4 in the slots 1.8. The springs 6 are prestressed so that, in the normal clutch position, the blade units are held by slots in their most extreme positions, as shown in FIG. 3. The spring ends 6A are guided and delimited in their vertical movement in their respective positions. and are pointed at their upper ends so as to form abutments permitting rotational movement of the units about axes parallel thereto and adjacent to the cutting edges of the corresponding blades. As best seen in FIG. 4, this rotational movement is limited by the engagement of the legs 12 to the rear surfaces of the slits 1.8 and the front surfaces 21 of the recesses 19. The cover member 4, which is located behind the blade units in the shaving direction, is defined and guided only vertically parallel to the corresponding movement of the blade units. The cover member is also pushed into its upper extreme position by its corresponding wire and springs as shown in FIG. 3.

FIG. 4 shows the movable parts in their extreme inner positions in which their springs 6 are "lowered" by the base 2 of the frame. 5 .lZ · μλ * α; When using a razor, the housing and blade units are capable of adapting to the different contours of the skin area due to their ability to move independently and against the spring return forces of their springs. the forces to which they are built. This movement independence is known to the person, but the blade units are also significantly able to rotate freely in order to allow each unit to maintain close contact with the skin at both its cutting edge 7A, and its skin surface by the skin, thereby maintaining optimal behavior through deflections in surface contours. This results from the fact that the axis of rotation of each unit is parallel to it and lies just in front of the sharpened blades.

FIG. 5 shows an outline of the contours of the contour to illustrate the manner in which the movable parts of the movement adapt to the undulations in the skin surface, and in particular to show how the behavior of the blade mono-automatic adjustments is maintained to maintain the desired skin contact.

The movement of the units is described above as "vertical".

This, of course, implies a certain behavior of the razor head. The purpose of the desired movement, irrespective of the behavior of the razor, is transverse to the imaginary plane containing the blade and the surface of the skin-engaging portion. /

Due to the self-protecting nature of the blade units, it will generally be unnecessary to use a separate protective member, but if used, it may be mounted for sliding movement, a spring suspension, in the same manner as a cover member.

Of course, the razor may have a single shaving unit or three or more if desired, but two units are currently considered optimal.

FIG. Figures 6 and 7 show a modified shape of the blade unit and the head frame, which are substantially similar to the above described SMSSbs yZ *> 7 7 S S j S ii Í Í Í Í Í A A A. however, they are subjected to some structural variations as described in principle below. The portions of the modified embodiment are provided with reference numbers increased by one hundred times with the reference numerals used for corresponding parts in the first embodiment. The blade units 105 are substantially identical to the first described except that the ears 114 are in the same plane as the guard portion instead of being moved upward. As a result, the axis of rotation " A " is the sagging unit than in the first embodiment.

The shaped head frame 101 ' of a different design is provided in the known manner with the lowered feet 22 by which it is adapted to releasably mount the upside end of the razor handle with limited freedom to rotate relative to the handle about the longitudinal axis.

The upper surface of the base 102 is formed with an upwardly projecting mandrel 102A for forming an integral rivet fastening of a metal spring member comprising a rectangular central portion 106A having integral spring fingers 106 extending in the longitudinal direction as well as upwardly from the plane portion 106A.

The rear wall of the frame 101 3 ® is formed by a U-shaped shape adapted to receive a cover molding 117 in a fixed position. In the frame end walls 103, slots 118 and tabs 119 are fully open from the top and separate tabs 123 are used for the retainer tabs of their frame lugs.

The function and operation of the blade units is as described above.

Claims (4)

, Fί · '-; ί WfSfe &amp; &amp; &amp; &amp; J S - 34 PATENT REQUIREMENTS 4 · le (t c *) ι ο Ί <<<<'<<<<<β β Α Α Α Α | [ixý. ....... . . -. ffz χ ··············································· a blade having a sharpened cutting edge, and a blade support extending to the platform to which the blade is attached with its edge extending forwardly from the platform, characterized in that the carrier further comprises an integral protective portion spaced forwardly from the blade edges and the support means on the carrier by which the integral guard and blade are carried when used by the shaving head, for co-rotating about an axis parallel to the blade retracted and positioned close thereto. 2. The method according to claim 1, wherein said blade carrier has a generally L-shaped cross-section, one of which is said to be of the aforesaid type. the second leg is lowered and lies at a distance forward of the blade edge, said guard surface being formed by a transition portion in the bend of the carrier. 3. according to claim 1, characterized in that said blade carrier generally has an L-shaped cross-section, one leg of which has said platform and the other leg is lowered and located at a distance from the edge of the blade with limited rotation about said axis. . AV 1/4 according to claim 2 or 3, characterized in that the carrier is provided at opposite ends with a pair of protrusions extending beyond corresponding ends of said platform and forming said stored means. 3. according to claim 2, 3 or 4, characterized in that said blade carrier is formed as a one-piece molding. A head comprising at least one blade unit according to any one of the preceding claims, in combination with a shaving head frame, characterized in that said blade unit is supported in a frame with rotation possibilities about said axis. - 7 - Head according to claim 6, characterized in that the blade unit or each blade unit receiving means is positioned and retained in the recessing portions in the counter-facing end walls of said frame. 8. FIBMBÉF Head according to claim 6 or 7, characterized in that the blade unit or each blade unit is also mounted for sliding movement relative to the frame under the action of shaving forces, against the action of the resilient elastic, in the direction transverse to the washed blade-like surface and the surface skin protector parts. 9. IMM · Head according to claim 8, characterized in that the opposite ends of the blade carrier or each blade carrier are engaged by engagement of corresponding springs, said ends being displaceable relative to each other in said transverse directions. WM * Head according to claim 9, characterized in that said frame is formed as a unitary blank having an elongated base with upwardly projecting walls at their opposite ends, wherein the inner surfaces of said walls are provided with slots in which the receiving means of the blade are inserted. the carrier or each blade carrier, wherein spring members are attached to the elongate base, which engage upwardly at their ends in said receiving means, wherein the inner surfaces of said walls are also provided with front and rear bearing surfaces engaging portions of the carrier to limit rotation of the carrier. JJI 11. * | ········································································································ for · · β · β · β · β · β · β · β · β · β · β · β connecting said blade-like blades and said guard portions to each other to maintain said said spaced apart position, and said receptacle means provided to said blade unit to allow said blade edge to rotate and said guard together about an axis of equilibrium. > Λ í, * ^ Λ '^ Ψ'; <'z \ _ ° - 8 - common with said blade edge and lying close to it, so that the geometric relationship between said blade edge and said guard may be maintained relative to one another when this blade unit moves along the user's face. H ♦ '