CN1227520A

CN1227520A - Rasor

Info

Publication number: CN1227520A
Application number: CN97197069.6A
Authority: CN
Inventors: 保罗·沃里克; 丹尼尔·B·拉扎尔奇克
Original assignee: Gillette Co LLC
Current assignee: Gillette Co LLC
Priority date: 1996-08-05
Filing date: 1997-07-28
Publication date: 1999-09-01
Anticipated expiration: 2017-07-28
Also published as: RU2214902C2; ATE230331T1; GB9616402D0; CA2261759C; AU738107B2; DE69718184D1; MY132495A; ID19214A; CA2261759A1; EG21083A; TW382609B; AU4046097A; WO1998005478A1; AR008109A1; CN1142050C; JP4267071B2; EP0929382B1; ES2185982T3; BR9710805A; JP2000515406A

Abstract

A safety razor including at least one movable blade. The blade is moveable with respect to other parts of the razor. Movement of the blade increases the blade tangent angle in response to forces encountered during shaving.

Description

Razor

The present invention relates to safety razor, and be particularly related to the blade assembly that safety razor is used.But blade assembly of the present invention both had been installed on the clip that uses on the handle replaceably, the also shaver head of disposable razor, and the blade loading station of disposable razor forever is connected with handle.The safety razor clip of Xiao Shouing comprises a moulded plastic frame that is roughly rectangle in the market, along the length extending direction of shelf backplate and lid surface is housed.Be the tandem blade of a pair of one-tenth in the shelf opening, their blade is parallel to each other, and towards the backplate surface.Blade is placed on the respective holder, and firmly connects with it, and the end of blade support is positioned in the groove of shelf end wall slippingly, thereby when shaving, blade can be withdrawn under the effect of power.The spring that acts on the blade can be pushed into normal position at rest with them.

As everyone knows, the what is called of blade assembly the fight to the finish performance of shaving of ledger-plate assembly of geometry of shaving plays an important role.The geometry of shaving is determined blade other skin engaging member relatively, the position and the orientation of particularly relative backplate and cover plate.A parameter of the geometry of shaving is that blade exposes the orientation, and this is that blade edge stretches out in the vertical range on the plane of shaving, then surperficial tangent with near the forward and backward skin engaging member of blade edge of plane of shaving.Blade in the above-mentioned existing blade assembly is to install like this, promptly when the load that is enough to overcome spring force acts on the blade, exposes the orientation and reduces.Another key factor in the geometry of shaving is the insert tangential angle, and this is the mid-plane of blade and the angle that intersect in the section, and the section then is and blade edge and adjacent blade tangent plane, skin engaging member surface before.For example, in the double blade clip, first or the insert tangential angle of main blade be the blade and the angle of intersecting with the tangent section of backplate surface and main blade edge.

When shaving, the blade of blade assembly is subjected to the acting in conjunction of tractive force and load force.Tractive force is the power on the substantially parallel plane of shaving, and load force then is to be pointed to the power of blade by skin at the in-plane of substantially vertically shaving.

Advise, for example United States Patent (USP) 4709477 and 4774765 proposes blade is mounted to, and makes blade to move, and exposes orientation and insert tangential angle so that increase along with the increase of tractive force.But strain-ga(u)ge measurement shows that tractive force does not change substantially during shaving.Usually beard is not vertical skin surface growth, and concerning most of men's beard, beard is that relative face is downward-sloping.Believe that when shaving, when blade moves in face of the pachylosis face substantially, when promptly up, the man uses razor with the pressure when descending in face of face, its final result is during uplink and downlink, and tractive force is big difference very not.Want by under bigger load pressure, using razor so that shave and more to be adjacent to according to people, thereby wish to have a kind of more initiatively blade geometry in this state in face of skin surface.But the razor that removable blade is housed in the prior art, is responsive load power in this way.

Therefore, the present invention attempts to fill the vacancy that prior art stays.According to the present invention proposes a kind of safety razor blades assembly, this assembly has at least a slice blade to be mounted to, during shaving, be subjected to the time spent of doing of power when blade edge, other skin engaging member of blade assembly carries out self-movement relatively, wherein blade or every blade are installed into, during shaving, can move, to increase the insert tangential angle along with acting on the load force on the blade.

In most preferred embodiment of the present invention, blade assembly comprises a framework, blade or every blade then are fixedly mounted in the blade support, blade support is connected on the framework by fulcrum, motion at the load bottom knife comprises that the angle that carries out around fulcrum moves, the more close blade edge of point that a shaft position then intersects than the skin contact surface that is close to before section and the blade.Also have, fulcrum is positioned at or tightly near the section.When the insert tangential angle increased, this layout made the orientation variation that exposes of blade reach minimum, and with regard to blade exposed the orientation, it changed really, but when the insert tangential angle increased, it reduced.In addition, the angle of blade moves the tractive force that acts on the blade insensitive substantially, and blade span, promptly before blade edge and the blade edge between the skin contact surface, measure on the tangential plane distance when the insert tangential angle increases, change not remarkable.This suits to fulcrum and the blade edge distance that is positioned at 0.2mm to 0.6mm scope of being separated by.

By in the blade assembly of the invention process, when beginning, blade or set of blades are arranged to have minimum cutting angle, this angle increases and increases along with load force then.As a result, compare with other device of the insert tangential angle being arranged to maximum when beginning, the present invention is more comfortable.

Blade support can be connected with framework easily, thus the relative framework of fulcrum and fixing, and but this is not an internal, and can make fulcrum have to a certain degree controlled motion.

Can obtain in conjunction with the accompanying drawings to inventing better understanding, wherein by following detailed description:

Fig. 1 is the cross section of the razor blade clip that proposes of the present invention, shown in blade be positioned at normal position at rest;

Clip in Fig. 2 presentation graphs 1, blade wherein is in maximum angular to the shift position;

Fig. 3 is the decomposition diagram of clip shown in Figure 1;

Fig. 4 is an enlarged drawing, and it has represented part blade assembly and support thereof in detail;

Fig. 5 is the perspective view of an expression correction type blade mounting arrangements;

Fig. 6 A and 6B are perspective view and end-view, and they represent the substituting blade mounting arrangements with hinge;

Fig. 7 A and 7B are perspective view and end-view, and they represent that another has the substituting blade mounting arrangements of housing bearing;

Fig. 8 A and 8B are perspective view and end-view, and they represent that another has the substituting blade mounting arrangements of movable fulcrum;

Fig. 9 A and 9B are perspective view and end-view, and shown blade mounting arrangements comprises one four bar push and pull system; And

Fig. 9 C represents that this embodiment is positioned at the blade displacement and is maximum state.

Safety razor blades assembly shown in Fig. 1-4 is the clip of shaving.The handle that clip is installed is expression not, and it can be a common form.Clip comprises the moulded plastic frame 1 that is roughly rectangle.The front of shelf comprises a guard bar 2, and installs the guard strip 3 of flexible material, and it has the vertical wing that stretches along guard strip.The backstop of shelf limits a lid surface 5, and device has the slat 6 of lubriation material.Three blades 7 with parallel edge are installed between the guard bar 2 and lid surface 5 in the shelf, thereby when shaving, blade passes through on skin successively.Every blade is to be mounted to regularly on the blade support 8, as being clear that by Fig. 4, be combined on each end of blade support be one forward with acclivitous cantilever 9, it has axle journal 10 at its free end.The axis of axle journal is parallel with blade edge, and separates one 0.2 to 0.6mm distance thus forward.Axle journal is placed in the bearing that is limited by spring base 12 and clamp stand end wall.Spring base has attaching parts 13, and in the socket of shelf wall, what become integral body with spring base is spring clip 14 with the snap-fastener fit engagement for they, and they act on the downside of respective blade, so that blade is pushed to their resting position as shown in Figure 1.The key member that is directed upwards towards 15 on the spring base is arranged to stretch into the narrow slit that is formed in the shelf end wall, so that axle journal 10 is clamped in their bearing that is defined in these narrow slits upper end, this can be seen by Fig. 1 and 2.By this layout, every blade 7 is installed in the clamp stand 1 and carries out the pivot rotation so that center on the axis that is limited by axle journal 10, and this axis is between the skin engaging member in blade edge and adjacent blade the place ahead, and this axis is positioned at or is close to the section of blade.Spring clip 14 is biased into the resting position of Fig. 1 with blade, and in this position, blade or their support rest on the convex shoulder 18 that forms on the shelf end wall.When blade 7 is subjected to acting on blade edge, and the basic vertical load force of pointing to the plane of shaving, and the load force size causes that the blade pivot rotates when being enough to overcome the prestressing force of spring clip 14, thereby when load force continues to increase, the increase gradually that cuts angle of blade.As seen from Figure 2, blade exposes the orientation to be reduced, but only slightly reduce if required, the minimizing that exposes direction can be offset by following method, being about to guard bar 2 is arranged to be installed by himself spring, or elastically deformable, thereby when blade was sending that pivot rotates under the effect of load force of blade to, guard bar will be gradually to pressing down under the respective load power that is applied to it.See that thus under this clip structure, when the razor user increases razor and presses to the power of desiring to repair the skin of scraping, the insert tangential angle also will increase thereupon.

As shown in Figure 5, substitute with blade support is integrally formed and be, cantilever 9 and axle journal 10 can be shaped as independent moulded parts 20, and they can be formed with slit to lay the end of blade support 8.

Fig. 6 A and 6B have showed a kind of device, and wherein blade 7 is formed by hinges 22 around carrying out pivotally supported fulcrum, and it is combined in the parts that comprise cantilever 9.These parts can form with clamp stand 1 integral body, or mold pressing separately, are mounted thereon then.

In the alternate embodiment of Fig. 7 A and 7B, blade support is an arc, and the end projection 24 on the support then is positioned in the corresponding arcuate slots that is assemblied in the shelf end wall, to form shell type bearing, limits blade 7 pivotally supported centers.

Every blade is limited to move around fixed pivot or pivotal axis does not have essence different.In the correcting principle of Fig. 8 A and 8B, shown cantilever 9 forms integral body with blade support, though they also can be mounted on the blade support then as mold pressing separately as shown in Figure 5, has hook 26 at the free end of cantilever.Hook rests on the cantilever support bar 27, and support bar 27 is fixed on the shelf end wall, and has the basic surface on plane that is, its opposite end limits corresponding pivot axis.During the initial pivot of blade rotated, cantilever 9 and blade 7 carried out pivot around the axis that is limited by support bar 27 leading edges and rotate, and during angular motion subsequently, pivot rotates around the pivotal axis that is limited by the support bar back edge and produces.

In the modification embodiment of Fig. 9 A, 9B and 9C, blade 7 is by the four bar connection rod set components supporting of integral die.First bar 30 constitutes cantilever 9, the second L shaped bar 31 is fixed on the clamp stand, the 3rd bar 32 is connected with cantilever 9 by a hinges 33 that limits blade 7 motion fulcrums, link to each other by the end of another hinges 34 with second bar 31, the 4th short and small bar 35 of length then links to each other with the other end and first bar of second bar by corresponding hinges 36,37.Under the effect that puts on the blade edge load force, bar 30 is around the support motion by hinge 33 restrictions.Because hinge 34, fulcrum has some downward motions, but this causes blade to expose mobile very little that the orientation reduces for a moment, because the length of the 4th bar 35 is very short.In the embodiment of all explanations, basic identical with Fig. 1-4 explanation of point location, the result, desired insert tangential angle just can obtain with the effect that load force increases, and while blade span change is not remarkable, and it is also still very little that blade exposes the change of direction.

Claims

1. safety razor blades assembly, this assembly has at least a slice blade to be installed into, during shaving, be subjected to the time spent of doing of power when blade edge, other skin engaging member of blade assembly carries out self-movement relatively, wherein, blade or every blade are installed into, and can move to increase the insert tangential angle along with acting on the load force on the blade during shaving.

2. according to the safety razor blades assembly of claim 1, it is characterized in that, blade assembly comprises a framework, blade or every blade then are fixedly mounted in the blade support, blade support is connected on the framework by fulcrum, the motion of blade comprises that the angle that carries out around described fulcrum moves, the more close blade edge of point that a shaft position then intersects than the skin contact surface that is close to before section and the blade.

3. according to the safety razor blades assembly of claim 2, it is characterized in that fulcrum is positioned at or is close to the section.

4. according to the safety razor blades assembly of claim 2 or 3, it is characterized in that the relative framework of fulcrum is fixed, and limit an axis that blade is around its support and carry out the pivot rotation.

5. according to the safety razor blades assembly of claim 4, it is characterized in that fulcrum comprises and is arranged on the blade support opposite end, and is engaged on the axle journal in the frame bearing.

6. according to the safety razor blades assembly of claim 2 or 3, it is characterized in that blade support is connected on the framework, thereby during the blade angle moves, the fulcrum motion.

7. according to the safety razor blades assembly of claim 6, it is characterized in that blade support has cantilever, this cantilever is meshed with the cramp bar that is fixed in framework and has opposite edges, when the angle of blade moved increase, cantilever carried out pivot successively around opposite edges and rotates.

8. according to the safety razor blades assembly of claim 3 or 6, it is characterized in that fulcrum comprises a hinges.

9. according to the safety razor blades assembly of claim 3, it is characterized in that fulcrum comprises the housing bearing.

10. according to each safety razor blades assembly among the claim 2-9, it is characterized in that fulcrum and the blade edge distance that is positioned at the scope of 0.2mm to 0.6mm of being separated by.