CN1116967C

CN1116967C - Safety razor

Info

Publication number: CN1116967C
Application number: CN97192795A
Authority: CN
Inventors: T·A·克里斯特曼; C·M·哈维斯
Original assignee: Gillette Co LLC
Current assignee: Gillette Co LLC
Priority date: 1996-01-16
Filing date: 1997-01-16
Publication date: 2003-08-06
Anticipated expiration: 2017-01-16
Also published as: AU1394797A; EP0960004B1; DE69705326T2; EP0960004A1; GB9600818D0; KR100523008B1; PL182457B1; CN1212647A; AU722992B2; JP3980060B2; CZ224898A3; WO1997026119A1; CZ290857B6; DE69705326D1; JP2000503222A; PL327852A1; ES2158482T3; RU2171174C2; CA2242529C; ATE202307T1

Abstract

In a safety razor, a blade assembly (2; 22; 52) is mounted to a handle by a mounting arrangement including several spring devices (8; 28: 68; 70) adapted so that the blade assembly is movable relative to the handle with several degrees of freedom, including pivotal movement about a longitudinal axis, pivotal movement about a transverse axis and translational movement in a downward direction substantially perpendicular to the plane defined by these axes. The longitudinal and transverse pivotal axes are not fixed in position and are variably located due to the spring suspension, allowing the blade assembly to follow closely the contours of a skin area being shaved.

Description

Safety razor

Technical field

The present invention relates to safety razor, particularly relate to and comprise a handle and one group of safety razor that is installed in this form of knife assembly on this handle, and can make this knife assembly with respect to this handle motion by a kind of device.The knife assembly of Miao Shuing comprises at least one elongated cutter and a knife rest between protective surface and cover plate face in embodiments of the present invention.But the present invention also is applicable to and is not bistoury but the razor of the thin blade of the sharp keen edge of a knife with holes.

Background technology

The motion that makes knife assembly for knife assembly being contained on the handle with scrape must process in the skin surface part that contacts skin be consistent, people had once proposed different suggestions.For example commercially available many razors all have the knife assembly that rotates around a longitudinal axis at present.Having described knife assembly among the number of patent application GB-A-2116470 before us also is a kind of razor that rotates around a transverse axis.But make knife assembly follow the contoured skin ability with these known structures and be subjected to the restriction of knife assembly with respect to the finite degrees of freedom of allowing motion of handle.

WO-A-8901394 is the most approaching prior art of the present invention, a kind of safety razor has been described, wherein one group of knife assembly is contained on the cutter handle, this handle is provided with a pair of spring loaded finger, this finger has bearing-surface at its free end, and the surface of the complementation that the downside of this bearing-surface and knife assembly frame forms acts synergistically and knife assembly can be rotated around a longitudinal axis.Additional fixedly finger prevents that knife assembly breaks away from from handle.Be provided with the separate motion of finger energy of bearing-surface, like this, the end of knife assembly can be towards handle while or separate motion.

Summary of the invention

The objective of the invention is to propose a kind of razor that one handle and is assembled in the knife assembly on the handle that has, the motion that can make knife assembly with scrape must process in the skin surface part that contacts skin be consistent.

The technical solution of above-mentioned purpose is this have a handle and one group of safety razor that is contained in the knife assembly on this handle by an erecting device, its erecting device comprise several be distributed in disperse the position be intended to knife assembly the spring suspension of supporting is provided and can make this knife assembly with several frees degree with respect to this handle motion, comprise rotatablely moving around a longitudinal axis, rotatablely moving and be approximately perpendicular to the translational motion of the plane downward direction that limits by this longitudinal axis and transverse axis around a transverse axis, wherein, the bearing position of two dispersions is vertically separated by a distance knife assembly, another bearing position then be connected these two axles that disperse bearing positions laterally at intervals.

The additional free degree of motion is provided and can makes knife assembly by spring suspension system independently more immediately following the profile of being shaved skin surface.Particularly, longitudinal rotating shaft and horizontal rotating shaft are not fixed on preposition, but can change its position owing to the independent suspension device.Knife assembly be equipped with one or many situation of elongated cutter in, knife assembly vertically and the motion in the backward directions do not meet the requirements, suspension arrangement then is suitable for knife assembly and prevents translational motion at this both direction conscientiously.

The exact number of spring suspension is not main, but needs three at least.Preferably arrange suspension arrangement like this, i.e. vertically separated by a distance at knife assembly of two bearing positions, another supporting position is laterally separated by a distance from the axle that connects these two bearing positions.It is favourable that four suspension arrangements are set, and with its be arranged on the contrary in pairs knife assembly knife rest for example respective corners near.This device can be made up of spring, and the plastics spring, semielliptic spring or the steel wire torsionspring that for example form one maybe can comprise the solid of the compression spring of related pitch of the laps.

The present invention is applicable to the razor of the knife assembly of razor with hard-wired knife assembly and changeable cutter holder form.In the later case, suspension arrangement can be integrated with cutter holder and have with the removable of handle and be connected, perhaps suspension arrangement is fixed on the handle and detachably directly is connected with cutter holder or is connected on the cutter holder that has a part that can discharge the knife rest connection, for example is slidingly connected by on record.

Below in conjunction with accompanying drawing several typical embodiment of the present invention is described.

Description of drawings

Fig. 1 represents the perspective view of the first embodiment of the present invention;

Fig. 2 represents the lower perspective view of second embodiment of the invention razor folder;

The end-view and the enlarged drawing of Fig. 3 presentation graphs 2 cutter holders;

Fig. 4 represents the perspective view of third embodiment of the invention.

Specific embodiment is described

Fig. 1 represents to be furnished with according to the present invention the upper part of the razor of an independent suspension system.Only show the top 1 of razor handle among the figure, by means of the bottom handle is held in the hand, this bottom is owing to being omitted principle of the present invention is unimportant.The cutter holder instrument that is installed in handle top has a general rectangle knife rest 6, and two parallel elongated cuttves 3 of the edge of a knife one in front and one in back are contained in respectively between protective surface 4 and the cover plate face 5 in this knife rest.

Cutter can be installed on the knife rest, also movable, for example move downward by the rightabout of on record mode by the restoring force of backspring element effect.This cutter holder 2 by respectively with four jiaos on knife rest near cutter holder be connected four independently suspension arrangement be connected to upper handle 1.Each suspension arrangement is made up of a steel wire torsionspring 8, and 9, two spring arms 10,11 of section that this torsionspring has one section pitch of the laps are mutually the acute angle stretching, extension from this pitch of the laps.The free end of arm 10,11 respectively with handle be connected with the cutter holder that rotatablely moves around the cutter holder longitudinal axis.Preferably the arm section of fall home is rotatably inserted in the hole of the end of upper handle and cutter holder.Pendulum spring 8 makes cutter holder deflect into a resting position, and on this resting position, cutter holder with respect to the position of handle as shown in Figure 1.Independent and flexibly be bearing in and make it have several frees degree on four points that separate by cutter holder with respect to handle motion.Particularly, in use, under masterpiece is used situation on the cutter holder, can make cutter holder move out from resting position by following motion:

A) translational motion of downward direction as shown in arrow 12;

B) moving down of cutter holder front portion or rear portion causes that centers on the effective of the knife rest longitudinal axis

Rotatablely move;

C) moving downward of the arbitrary end of cutter holder causes effectively rotatablely moving around transverse axis

Or tilt.

Certainly, do not need to distinguish these motions, and they can and can make protective surface and the profile of the skin surface that the cover plate face passes through immediately following them by any combination results in the process of shaving.Cutter holder need not the predetermined longitudinal axis and the transverse axis fixing with respect to razor handle rotate, and pendulum spring can make cutter holder float, so the active position of rotating shaft changes.The degree of allowing motion does not need too big.

Cutter holder fixedly secures in a rightabout of torsionspring 8 motions, that is the cutter holder parallel with the edge of a knife vertically in, so stoped the translational motion backward shown in the arrow 13, and the motion backward of the arbitrary end of cutter holder all can cause effectively rotatablely moving or swinging around an axle that extends downwards.

In Fig. 2 and second embodiment shown in Figure 3, independently suspension arrangement is made up of four semielliptic springs 28 that oppositely are provided with in pairs.Cutter holder 22 comprises a knife rest 6, in this example, is bearing in three on the tool rest 33 carrying out guiding movement in the groove of cutter 3 in the knife rest end wall and upwards promoting by spring.The upper arm 31 of each semielliptic spring 28 has a L shaped free end firmly to be connected on the knife rest with a clip 34.Can know in Fig. 2 and find out that part all has a groove that can freely pass through semielliptic spring upper arm 31 before and after the knife rest.The free end of semielliptic spring underarm 30 constitutes a fixing point that is connected with the cutter handle, for example by a releasable clamping device, has the fixedly cutter holder of pendulum spring so that change.

Certainly, though it is near from the end that semielliptic spring is positioned at from the center of cutter holder ratio, but semielliptic spring can provide basically as the identical free degree of the top relevant described cutter holder of first embodiment with respect to handle motion, and particularly, above-mentioned (a) is to the translational motion and the angular motion of (c).

Fig. 4 represents further embodiment of this invention, and in this example, handle top 51 comprises four support block 64 with vertical hole, and rotatable axle 65 is housed in vertical hole.Axle 65 has the amplifying head 66 of horizontal through hole 67 in its outer end.Be generally upright pillar 68 can be in the hole slide-and-guide, and have flange 69 near the upper end, this flange plays the backstop effect to the upper end of the spring 70 of coiling, to withstand the coaxial spring that is contained on this pillar, the lower end of spring then rests on the axle.So spring 70 upwards promotes 68 to resting positions of pillar, the lower end of the pillar of fitting with the amplifying head 66 of axle on this position is provided with amplifies part or stop part (not shown).The upper end of each pillar all rotatably and resemble the pivot and be connected on the knife rest 56 or cutter holder 52 of knife assembly.(in Fig. 1, only show the knife rest of knife assembly, but clearly, as the embodiment of front, it comprises at least one elongated cutter and protective surface and cover plate face.) preferably each pillar 68 all have one for example the such part of spheroid be fixed on its upper end, and the part from the complementary groove 72 that the knife rest abutting end extends inwards of packing into.At least one pair of vertical straight axle 65 (with two pairs of axles of possibility) all has part with holes 75 and is keyed onto on its inner end, and there is sizable tension spring 76 to be connected between these with holes and the spring anchor head 77, these spring anchor heads are fixed on the upper handle part 51, keep basically on the vertical diagram position of rotation so that tension spring makes axle 65 deflect into pillar 68.

The independent spring suspension arrangement of razor shown in Figure 4 can make cutter holder 52 from removing with the resting position that the identical free degree by the described motion of Fig. 1 (a) to (c) deflects into by means of spring 70,76.Can realizing by spring 70 of the every angle of cutter holder to bottom offset, and the pillar 68 of slide-and-guide is positioned on the adjacent angle.68 jiaos on pillar moves a little angle can realize that along the rotation of the opposite offset direction of tension spring 76 such angle is moved and needed around its axis by axle 65, so that cutter holder is around longitudinal axis rotation.Foot can stop the motion backward of cutter holder under the situation of spring 76 normal active force in the process of shaving.The lengthwise movement of cutter holder is stoped by the supporting surface between knife rest and the pillar.

Clearly, illustrated razor is typical embodiment more of the present invention, and other independent suspension device also can provide several frees degree of cutter holder motion to closely follow the profile of skin in the process of shaving.Clearly, though can make amendment in spirit and scope of the invention and change, our purpose is only limited to the claim of enclosing.

Claims

1. one kind has a handle and one group and is contained in knife assembly (2 on this handle by an erecting device; 22; 52) safety razor, this erecting device comprise that several being distributed in disperse positions to be intended to knife assembly (2; 22; 52) provide the spring suspension (8 of supporting; 28; 68; 70) can make this knife assembly with several frees degree with respect to this handle motion, comprise (i) rotatablely moving around a longitudinal axis, (ii) center on rotatablely moving and the translational motion that (iii) is approximately perpendicular to the plane downward direction that limits by this longitudinal axis and transverse axis of a transverse axis, it is characterized in that, the bearing position of two dispersions is vertically separated by a distance knife assembly, another bearing position then be connected these two axles that disperse bearing positions laterally at intervals.

2. by the safety razor of claim 1, it is characterized in that spring suspension is shifted knife assembly onto a resting position, and this cutter holder can move out from this resting position to (iii) any motion or any combination of these motions by above-mentioned (i).

3. by the safety razor of claim 1 or 2, it is characterized in that four spring suspensions (8; 28; 68; 70) oppositely be provided with in pairs.

4. by the safety razor of claim 3, it is characterized in that, bearing position be positioned at knife assembly knife rest respective corners near.

5. shave power by each insurance of claim 1 to 4, it is characterized in that suspension arrangement is by spring part (8; 28) form.

6. by the safety razor of claim 5, it is characterized in that spring part is semielliptic spring (28).

7. by the safety razor of claim 5, it is characterized in that spring part is torsionspring (8).

8. by each safety razor of claim 1 to 4, it is characterized in that suspension arrangement comprises the rotating column (68) that is connected with knife assembly (52) and the compression spring (70) coaxial with this column.

9. by each safety razor of claim 1 to 8, it is characterized in that suspension arrangement directly and the knife rest (6 of knife assembly; 56) connect.