MXPA06010278A - Saving razor with additional trimming blade - Google Patents

Abstract

A shaving razor (10) including a housing (20) having a primary guard (22) at a front of the housing and a primary cap (24) at an upper surface at a back of the housing, one or more primary shaving blades (28) between the primary guard and said primary cap, and a trimming blade (504) mounted at the back of the housing having a trimming blade cutting edge (536) oriented away from the upper surface. The razor also has an elongated handle (14) having a curve (720) at end secured to the housing, with the curve being concave on the same side as the primary blades. The elongated handle can also have a finger pad (726) at the end of the handle secured to the housing on the same side as the primary blades. The elongated handle can also be bifurcated at the end of the handle secured to the housing into two portions (722, 724) such that there is a region between the two portions.

Description

SHAVING MACHINE WITH ADDITIONAL TRIMMING SHEET The invention relates to a razor having a trimming blade. In recent years, shaving machines with several blades have been proposed in patent literature and marketed, as discussed p. ex. in U.S. Pat. no. 5,787,586, which generally describes a type of design marketed by The Gillette Company as the triple-blade Mach lll razor. Increasing the number of blades on a razor usually improves the machine's efficiency and the distribution of compressive forces on the skin, but can also result in increased drag forces, reduce handling capacity and decrease the ability to cut, p. ex. the whiskers and hairs that are close to the nose. U.S. Pat. no. 6,276,061, incorporated herein by reference, discloses the placement of an extra sheet for trimming on an angular blade support on the back of a three-blade shaver. The patent does not disclose the manner in which the sheet is secured in the housing, and illustrates the sheet attached to a machine having a cartridge and handle of the design corresponding to the Mach lll razor, as shown in Figure 14 of the present. In one aspect, the invention generally shows a razor including a housing with a primary cover in a front portion of the housing and a primary cover in a top surface of an inset portion of the housing, one or more razor blades primary between the primary cover and that primary cover, a cutting sheet with a cutting edge oriented away from the upper surface, located at the rear of the housing. The razor also has an elongated handle that has a curve at the end secured to the housing; the curve is concave on the same side as the primary leaves. In another aspect, the invention shows, in general, a razor including a housing with a primary cover, a primary cover, one or more primary razor blades between the primary cover and the primary cover, a cut sheet having a cutting edge oriented away from the upper surface located at the rear of the housing and an elongated handle having a finger pad at the end of the handle secured to the housing, on the same side in which the primary sheets are located. In another aspect, the invention shows, in general, a razor that includes a housing with a primary cover, a primary cover, one or more primary razor blades between the primary cover and the primary cover, a cut sheet that is a cutting edge oriented away from the upper surface located in the iris part of the housing, an elongated handle which is bifurcated at the end of the handle secured to the housing in two portions forming a region therebetween.

The particular embodiments of the invention may include one or more of the following characteristics. The finger pad may be made of an elastomeric material. The handle may have freed portions that allow access to the finger pad. There may be three, four, five or more than five primary leaves. The housing can be connected to the handle in the form of a pivot by means of a connection having a stop position at rest to prevent that housing from rotating while trimming the hair with the cutting blade. Some embodiments of the invention may include one or more of the following advantages. The curve of the handle on the same side in which the primary leaves are located, the finger pad located on the same side and the access to the finger pad provided by the bifurcated handle allow the user to place a thumb or other finger in line with the cutout sheet and directly below it when the pins, whiskers or other hairs of the user's skin are trimmed to provide greater precision and control. Other advantages and features of the invention will be apparent from the following description of particular embodiments and the appended claims. Figure 1 is a perspective view of a razor.

Figure 2 is a perspective view of the razor of Figure 1 illustrating its replaceable cartridge separated from its handle. Figure 3 is a perspective view of a razor blade unit of the razor of Figure 1 without the primary razor blades. Figure 4 is a plan view of a trimming unit of the razor blade unit of Figure 3. Figure 5 is a rear elevation of the trimming unit of Figure 4. Figure 6 is a view of the base of the trimming unit of Figure 4. Figure 7 is a front elevation of the trimming unit of Figure 4. Figure 8 is a vertical section view taken along line 8-8 of Figure 6 , of the housing of the razor blade unit of Figure 3. Figure 9 is a vertical sectional view taken along line 9-9 of Figure 6, of a portion of the razor blade unit of Figure 3. Figure 10 is a vertical sectional view taken along line 9-9 of Figure 6, of a portion of the razor blade unit of Figure 3.

Figure 11 is a perspective view of the razor blade unit of Figure 3 without the razor blades. Figure 12 is a perspective view of the back of the housing of the razor blade unit of Figure 3. Figure 13 is a perspective view of a blade holder component of an alternative embodiment of a trim unit without the cutout sheet. Figure 14 illustrates a prior art apparatus applied to the skin for shaving. Figure 15 illustrates the razor of Figure 1 applied to the skin for shaving. Figure 16 illustrates the razor of Figure 1 rotated 90 ° from the orientation illustrated in Figure 15. With reference to Figures 1 and 2, the razor 10 includes a disposable cartridge 12 and a handle 14. cariucho 12 includes a connecting member 18 which is connected to the handle 14 and a razor blade unit 16 which is pivotally connected to the connecting member 18. The razor blade unit 16 includes a plastic housing 20, a primary cover 22 on the front of the housing, a cover 24 with a lubricant strip 26 on the back of the housing 20, five elongated sheets 28 between the primary cover 22 and the primary cover 24 and a cutting blade unit 30 attached to the rear part of the housing 20 by means of fasteners 32 which also retain the leaves 28 in the housing 20.

With reference to Figure 3, the trimming blade unit 30 is secured to the back of the housing 20 and includes a blade holder 502 and a trim blade 504 located on that blade holder. The blade holder 502 is made of a stainless steel sheet metal having a thickness of 0.028 cm (0.011") cut and formed to provide support structures for the cut sheet 504 and to define a cutout cover and cap surfaces for that purpose. cover and to attach it to the housing 20. With reference to Figures 3-9, the blade holder 502 has a rear wall 506, upper tabs 508, 510 curved in such a way as to extend forward at both ends from the top of the cover. rear wall 506, a bottom wall 512 curved so as to extend forward along the length of the rear wall 506 at the bottom of the rear wall 506 and two side portions 514, 516, each of the which is formed by a side tab 518 curved so as to extend forward from the respective side at one end of the rear wall 506 and a vertical tongue 520 curved in such a way that It extends upwards from a respective end of the lower wall 512. The central portion of the rear wall 506 is open at its lower portion forming an empty space 522 between the lower end surface 526 of the rear wall 506 and the trim cover 528 extending upwardly from the bottom wall 512. Two alignment surfaces 530 are located at a precise distance from the bottom of the terminal surface 526 at the two ends of that surface 526. The sheet cutout 504 is welded to inner surface 532 of rear wall 506 by means of punched welds 534 and cutting edge 536 of cutout sheet 504 is aligned with alignment surfaces 530. All edges surrounding empty space 524 and that they will come into contact with the user's skin are rounded and provide a radius of curvature of 0.2 mm in such a way that the user does not feel the edges. With reference to the Figures, 3, 5-10, the empty space 522 causes the cutting edge 536 of the cutting blade 504 to be exposed. As best seen in Figure 9, the rear wall 506 and its lower end surface 526 provide a trim cap 535 for the trim sheet 504 and its cutting edge 536 and define the exposure area for the trim sheet 504. With Referring to Figures 3 and 10, two skin protection projections 537 spaced from the two ends extend into the space located behind a tangent line from the cutting cutting edge 536 to the clipping cover 528 to limit the volume of user skin that can be bulked in the space between the cutting cutting edge 536 and the cutting cover 528. With reference to Figures, 4 and 6, the upper side tabs 508 and 510 have upper grooves 538 and the lower wall 512 has aligned slots 540 where the fasteners 30 used to secure the clipping blade unit 30 are inserted into the housing 20. With reference to Figures 3 and 6, the bottom wall 512 it also has cavities 542 which engage the projections 544 of the housing 20 to facilitate alignment and keep the unit 30 in the proper position in the housing 20. With reference to Figures, 3, 6, 8, 9, 11, 12 , the lower wall also has four slots for the removal of remnants 546 that are aligned with four ducts for the removal of remnants 548 in the housing 20 useful for eliminating during shaving the remains that remain in the region that is behind and below the edge 536. To make the sheet holder 506, a sheet of metal is cut and shaped. The cutting sheet 504 is then placed against the inner surface 532 and the cutting edge 536 is aligned with the alignment surfaces 530 using an automatic positioning member, and then secured to the inner surface 532 by spot welding 534, with the cutting cutting edge 536 in the precise position with respect to the cutting cover 528 and the cutting cap 534. The cutting unit 30 is then placed in the rear part of the housing 20 by sliding it forward on the rear part of the housing 20 with cavities 542 of the inner wall 512 aligned with projections 544 of the housing 20. Simultaneously, the upper projections 502 and the lower projections 554 of the housing 20 (Figure 8) are deformed by the compression applied between the upper tabs 508, 510 and the lower wall 512 when the unit 30 moves forward on the rear part of the housing 20. Then, the unit 30 is as the housing 20 by means of fasteners 32 passing through upper slots 538 and lower slots 540 of the blade holder 506 and aligned slots 550 through the housing 20. During use, the handle 14 of the shaver rotates 180 ° from the position in which it is usually held such that the thumb is supported on the pad 726 (Figures 14 and 15) on the side near the primary cover 22, and moves the back of the razor blade unit toward the area of the skin that will be shaved with the trim sheet 504 in alignment with the edge of the hairs to be trimmed, e.g. ex. in a place where it is desired to shave the lower edge of the pin or an edge of the mustache or the beard or under the nose of the user when shaving the hairs of these difficult to shave places. The razor blade unit 16 is located in its rest position with respect to the connecting member 18, and therefore does not rotate when the user presses the back of the razor blade unit 16 and the cutting edge 536 against the skin. and then move it laterally on the skin to trim the hairs. The cut hairs and other shaving debris that pass to the region located behind the cutting edge 536 during the cutting pass through the conduits for the removal of debris 548 from the housing 20 and the slots for the removal of remnants 546 aligned in the lower wall during the removal. cutout, and the entire region and the ducts and slots for the removal of debris are easily cleaned during rinsing with water, e.g. ex. between passes of the machine to shave or trim. The cut hairs and shaving debris can also pass through conduits 549 behind the conduits 548 and above the lower wall 512. The location of the cutting edge 536 of the cutting blade 504 with respect to the rear wall 506 of the razor blade unit prevents the user from cutting the skin while using the cartridge 12 and the razor 10. The inclusion of a trim sheet and a trim cover in a common unit coupled to a housing of a blade the razor facilitates the precise location of the trim cover with respect to the trim sheet to provide a precise trimming sheet tangent angle and accurate spacing between trim sheets. With reference to Figure 13, an alternative blade holder 600 includes a comb guard 602 having separate segments 604 to facilitate the removal of shaving debris, trimming of the pins and other longer hairs, and allows the inclusion of protective surfaces. located precisely when forming the cover during the manufacturing process. The sheet holder 600 also has rinsing openings 606 to facilitate the removal of trapped hairs between the trim sheet 504 and the housing 20 (see Figure 9). In this embodiment, the space between the housing 20 and the blade is larger than the one illustrated in Figure 10 to facilitate the removal of cut hairs and shaving debris.

With reference to Figure 14, it is noted that the handle of the shaver 700 has the design of the Mach III; the end of the handle 702 has an S-shaped curve 704 which includes a first curve 706, a second reverse curve 708 cambered in the proper place for a user to support the thumb or other finger when using the trim sheet located in the end 710 of the cartridge 712 for trimming the hairs on the surface of the skin 714 with precise control. With reference to Figures, 15 and 16, the handle 14 includes a single moderate curve 720 in the extrude, concave on the same side in which the primary leaves 28 are located. The handle 14 is bifurcated into two portions 722, 724 of so that an empty region is formed therebetween so that the user has access to the finger pad 726 located on the concave side of the curve 720. The moderate curve 720 located on the same side as the primary leaves and the pad for the finger 726 and access to pad 726 that provides the bifurcated handle allows the user to place the thumb or other finger in line with the cutout sheet 504 and directly below that sheet 504 located at the corner 728 illustrated in Figure 14 when the user trims the whiskers, whiskers or other hairs of their skin 730. The finger pad 726 is made of an elastomeric material and has projections that provide a suitable connection. The internal surfaces 732, 734 of the portions 722, 724 are released to allow access to the finger pad 726.

Claims (12)

1. A razor comprising: A housing with a primary cover on a front part of that housing and a primary cover on a top surface of a rear part of that housing, one or more primary razor blades between that primary cover and that cover primary, a cutting blade with a cutting edge oriented away from the upper surface, located at the rear of the housing, and an elongated handle having a first end secured to that housing, that handle has a curve at that first end which is concave on the same side on which those primary leaves are located.

2. A razor comprising: A housing with a primary cover in a front part of that housing and a primary cover in a top surface of a rear part of that housing, one or more primary razor blades between said primary cover and that primary cap, a cutting blade with a cutting edge oriented away from the upper surface, located at the rear of the housing, and an elongated handle having a first end secured to that housing, that handle has a finger pad in that first end on the same side on which those primary leaves are located.

3. A razor comprising: A housing with a primary cover on a front part of that housing and a primary cover on a top surface of a rear part of that housing, one or more primary razor blades between said primary cover and that primary cap, a cutting blade with a cutting edge oriented away from the upper surface, located at the rear of the housing, and an elongated handle having a first end secured to that housing, that handle is bifurcated at that first end at two portions so that a region is formed between those two portions. The razor according to claim 1, further characterized in that said handle has a finger pad at that first end on the same side in which said primary sheets are located. The razor according to claim 3, further characterized in that said handle has a finger pad at that first end on the same side in which said primary sheets are located. The razor according to claim 1, further characterized in that said handle is bifurcated at that first end in two portions so that a region is formed between those two portions. The razor according to claim 2, 4 or 5, further characterized in that said finger pad is made of elastomeric material. The razor according to claim 2, 4 or 5, further characterized in that said handle has released portions that provide access to that finger pad. 9. The razor according to claim 1, 2 or 3, further characterized in that it includes more than or equal to those of the primary razor blades. 10. The razor according to claim 1, 2 or 3, further characterized in that it includes four or more of four of those primary razor blades. 11. The shaver in accordance with the claim 1, 2 or 3, further characterized because it includes five or more than five of those primary razor blades. 12. The razor in accordance with the claim 1, 2 or 3, further characterized in that said housing is pivotally connected to that handle by means of a connection having a stop position at rest to prevent that housing from rotating while trimming the hair with the trimming blade.