CN2252088Y - Shaver - Google Patents

Abstract

The utility model relates to a shaver which is provided with a cutting assembly at least, comprising a fixed knife blade and a group of moving knife blades. The fixed knife blade is formed by bridges which are arranged among a plurality of long and thin whisker inlet small holes. The shaft of the cross section of the bridge is an isosceles trapezoid. The upper bottom edge of the trapezoid is meshed with the both side edges of the trapezoid through the transition small circular arcs. The radius r of the small circular arc is one-third of the thickness h of the fixed knife blade. The lower bottom angle alpha of the trapezoid takes 85 to 89 DEG. The utility model can not scratch the skin, and can increase the comfortable feeling.

Description

Shaver

It is that ledger-plate and one do in relative rotation with outer cutting member that inner cutting member is the shaver that cutting blade is formed that the utility model relates to by outer cutting member, relates in particular to elongated design of advancing the bridge between the palpus aperture on the ledger-plate.

Above-mentioned shaver is existing open in Chinese patent 90109176.6, this shaver comprises that an outer cutting member can cut the inner cutting member that member rotates relative to outer with one, outer cutting member is formed by some elongated bridges that advance between must aperture, the longitudinal side wall of each aperture is an almost parallel, it is characterized in that: on the rotation direction of inner cutting member, see, respectively advance must aperture sidewall all be that outside from outer cutting member tilts to its inner edge, in cross section longitudinally, be parallelogram basically two shapes of advancing the bridge between the palpus aperture perpendicular to bridge.

Such design is with the following prerequisite that is assumed to be: inclination advance must the aperture sidewall effect be behind skin-tightening, can make beard hold up and the root that gives beard has individual strong point, beard is excised ideal length.

In fact the prerequisite of this hypothesis is inclined to one side face, and this can the following fact illustrate.

The first, if that a part of skin surface that the outer surface of skin under the effect that pressure is arranged, enters in the elongated aperture must be tightened.If whole beard all enters aperture, beard will be vertically on the skin surface that is tauted, and the strong point of beard to be stationary knife obtain in the irregular moving process on skin, therefore irrelevant with the shape of the vertical longitudinal cross-section of bridge.

The second, in the whole process that shaves, the excision of every beard be not the once resecting ideal length to root, but stationary knife is cut to root through several in the moving of pressure arranged with in the fast rotational process of moving knife.In this working angles, the cutting edge thickness of stationary knife plays a part very important, and advance must aperture the inclination of sidewall do not play an important role.

At last, whether the sharpness of shaver is in shape relevant with the cutting edge contact-making surface of moving knife by the cutting edge of stationary knife, relevant with the size of the power of moving knife on direction of rotation, relevant with the cutter head angle of moving knife, and irrelevant with the shape of advancing the palpus aperture.

In sum, the sidewall design of advancing the palpus aperture is become, parallelogram is adopted in the cross section of bridge, to raising shave performance, the excision ideal length effect be limited,, because the existence of the sharp comer of parallelogram (being the outer wall of ledger-plate and the acute angle of the sidewall formation of advancing the palpus aperture), shaver is pressed in when sliding on the skin, can produce and draw pain, the aperture sidewall of Qing Xieing also hinders beard to stretch in aperture vertically simultaneously.

The purpose of this utility model is to improve the shape of cross section of the bridge of ledger-plate, makes beard advance must the easier stretching, extension of aperture vertically, eliminates the pain of drawing to skin simultaneously.

For achieving the above object, the design that the utility model adopts is: a kind of shaver that has a cutter assembly at least, it comprises the cutting blade that a ledger-plate and a group can rotate with respect to ledger-plate, ledger-plate is formed by some elongated bridges that advance between must aperture, it is characterized in that: in longitudinal cross-section perpendicular to bridge, two shapes of advancing the bridge between the palpus aperture are isosceles trapezoids, this trapezoidal dual-side is two adjacent sidewalls that advance the palpus aperture, last bottom line is the outer wall of ledger-plate, following bottom line is a ledger-plate, the inwall that is meshed with cutting blade, last base is less than the bottom, last base and dual-side have transition roundlet arc kiss to connect, 1/3rd of the thickness that it is ledger-plate that the radius r of the little circular arc of this transition is about above-mentioned trapezoidal high h, this trapezoidal following base angle are got 85 to 89 degree.

Good effect of the present utility model is: because of the longitudinal cross-section perpendicular to bridge is an isosceles trapezoid that the top is little, following big, advance must aperture lateral cross section also just to be upper base big, the little isosceles trapezoid of going to the bottom, the beard that enters aperture is easy to vertically under the situation that skin in compression is tightened, simultaneously, because the last base of the trapezoid cross section of bridge and dual-side have little arc transition kiss to connect, beard also is easier to slip into into palpus aperture, and extend, the little circular arc of transition can not drawn pain to skin yet, has increased comfort sense.

Provide embodiment of the present utility model and accompanying drawing thereof below.

Fig. 1 is the perspective view with shaver of three cutter assemblies.

Fig. 2 is the plan view of a cutter assembly, and wherein ledger-plate is not shown at the right half part of this figure.

Fig. 3 is the cross-sectional view that cuts along Fig. 2 III-III line, for the purpose of clear wash rice two cutting blades only is shown.

Fig. 4 illustrates the amplification cross sectional view of the part of the ledger-plate that cuts along IV-IV line among Fig. 2, and the part of skin also is shown, with the working condition of expression shaver.

Shaver shown in Figure 1 comprises a shell 1 that has three cutter assemblies 2.

Cutter assembly (Fig. 2 and Fig. 3) comprises a ledger-plate 3 and one group of cutting blade 4 that can be driven work with respect to ledger-plate 3 rotations.Cutting blade 4 can be driven in known manner by a motor that is contained in the shell 1.

Ledger-plate 3 has a flat circular wall part, and this circular wall is partly with many longitudinal extensions, and radially radial elongated advance must aperture 11.Advancing must aperture 11 be that sidewall with two adjacent bridges 9 is the boundary.Cutting blade 4 is placed on the cutter hub 5 that is rotated by Motor Drive, and the cutting edge 6 of cutting blade 4 is meshed with the inwall 12 of ledger-plate 3.As shown in Figure 4, the special feature of present embodiment is in the longitudinal cross-section perpendicular to bridge 9, is isosceles trapezoids two shapes of advancing the bridge 9 between the palpus aperture 11.This trapezoidal dual-side is exactly two adjacent sidewalls that advance palpus aperture 11, and last base is the outer wall 10 of ledger-plate 3, and the bottom is the inwall 12 of ledger-plate 3, and last base is less than the bottom.Last base and dual-side have transition roundlet arc kiss to connect, 1/3rd of the thickness that it is ledger-plate 3 that the radius r of the little circular arc of this transition is about above-mentioned trapezoidal high h, and this trapezoidal following base angle is got 85 to 89 degree.According to experience, angle α is decided to be 87 degree, and the sharpness of shaver is best.

In the shaver use, the outer wall 10 of ledger-plate 3 is pressed on the skin and moves, being positioned at into, the skin at palpus aperture 11 places is tauted, whole beard 13 enters aperture 11 just can be vertical, be under the effect of inwall 12 of ledger-plate 3 in the bottom of the cutting edge 6 of cutting blade 4 of rotation and bridge 9, cut on the direction P of power.

In the present embodiment, advance the width t of hole aperture 11, the thickness h of ledger-plate 3, cutting blade 4 all are the important parameters that influences the shaver performance with the angle of inclination beta of the inwall 12 of ledger-plate 3.According to known technology, the t of their span should get 0.25 to 0.3 millimeter, and h should get 0.07 to 0.10 millimeter, and β should get 40 to 60 degree.

Claims (2)

1. shaver that has a cutter assembly at least, it comprises the cutting blade that a ledger-plate and a group can rotate with respect to ledger-plate, ledger-plate is formed by some elongated bridges that advance between must aperture, it is characterized in that: in longitudinal cross-section perpendicular to bridge, two shapes of advancing the bridge between the palpus aperture are isosceles trapezoids, this trapezoidal dual-side is two adjacent sidewalls that advance the palpus aperture, last bottom line is the outer wall of ledger-plate, following bottom line is a ledger-plate, the inwall that is meshed with cutting blade, last base is less than the bottom, last base and dual-side have transition roundlet arc kiss to connect, 1/3rd of the thickness that it is ledger-plate that the radius r of the little circular arc of this transition is about above-mentioned trapezoidal high h, this trapezoidal following base angle are got 85 to 89 degree.

2. shaver according to claim 1, it is characterized in that described trapezoidal following base angle get 87 the degree.

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