EP0259304A1

EP0259304A1 - Vibrating razor with cutting blade.

Info

Publication number: EP0259304A1
Application number: EP19860901418
Authority: EP
Inventors: Jacques Leroux
Original assignee: Individual
Current assignee: CHENARD, JULIA; CORNUT Alain; Leroux Jacques
Priority date: 1985-02-25
Filing date: 1986-02-25
Publication date: 1988-03-16
Anticipated expiration: 2006-02-25
Also published as: MC1815A1; DE3671186D1; WO1986004854A1; AU5459386A; EP0259304B1; FR2577842A1

Abstract

Rasoir du type comportant une lame logée et maintenue de façon solidaire dans une tête support, elle-même solidaire d'un corps de rasoir (5) s'étendant perpendiculairement au bord tranchant de la lame. Le rasoir est caractérisé en ce que l'ensemble solidaire ainsi constitué par la lame (1), sa tête support (3) et le corps de rasoir (5) porte, au voisinage de la tête support (3) un moteur électrique (7) portant sur son axe (12) une masselotte excentrée (11) de manière à faire accomplir à ladite tête support (3), de façon parallèle au bord tranchant (2) de la lame (1) un mouvement de faible amplitude et de fréquence élevée et en ce que la tête support (3) est pourvue d'éléments de maintien et verrouillage amovible lui assurant une ferme solidarité avec le corps de rasoir (5). L'invention permet de constituer un rasoir dans lequel le bord tranchant décrit une trajectoire sans déplacement de la lame par rapport à la tête support, ni au corps de rasoir.Razor of the type comprising a blade housed and held integrally in a support head, itself integral with a razor body (5) extending perpendicularly to the cutting edge of the blade. The razor is characterized in that the integral assembly thus constituted by the blade (1), its support head (3) and the razor body (5) carries, in the vicinity of the support head (3) an electric motor (7 ) carrying on its axis (12) an eccentric flyweight (11) so as to cause said support head (3) to perform, in parallel to the cutting edge (2) of the blade (1), a movement of low amplitude and frequency high and in that the support head (3) is provided with retaining elements and removable locking ensuring a firm solidarity with the razor body (5). The invention makes it possible to constitute a razor in which the cutting edge describes a trajectory without displacement of the blade relative to the support head, nor to the razor body.

Description

Vibrating razor with sharp blade

The invention relates to a vibrating razor with a transparent blade and more particularly a set of means intended to improve the efficiency and reliability of ra¬ evenings of this type currently known.

It also relates to a manufacturing method particularly adapted to the constitution of such a razor, so that the manufacturing cost of the razor is as low as possible.

It should be specified that the razor, object of the invention, is of the type in which the blade is connected to a support by appropriate means of holding, this support itself being connected to a transverse handle at the cutting edge of the blade and which constitutes the gripping and pulling member of the razor.

In the context of this type of razor, it has already been proposed, in order to improve the cutting power of the blade, to interpose between the latter and its support drive means connected to an energy source suitable, these means being arranged so as to cause the said blade and in its plane, relative to its support, in which it can slide parallel to its cutting edge, to perform a linear reciprocating movement parallel to said cutting edge. However, such a device poses the arrangement of relatively complex blade drive means while means for guiding the blade in its support must be provided. Such a device is described in particular in BR. FR. 1,185,200.

It follows, both from the relative complexity of the drive means intended to communicate to the blade its reciprocating movement relative to the support head, that from the need for the provision of sufficiently precise guide means intended to avoid parasitic and dan¬ gerous vibrations of this blade relative to its support, that such razor has a high manufacturing cost which makes it difficult to distribute a large number of razors of this type.

In order to remedy these drawbacks, it has already been proposed to communicate to the handle of the razor itself a vibratory movement parallel to the plane of the blade by fitting, in an integral manner, in the part of said handle which undergoes the gripping and traction action of the user, of an electric motor whose axis of rotation co-axial to the handle, carries on its end oriented towards the blade support and in an integral manner, a eccentric gobball which, thus driven in rotation by the motor shaft, determines the vibration input of the whole handle and of the blade support. The vibratory movement is then of substantially circular shape in a planperpendicular to the axis of the motor and, theoretically, the support entrai¬ not in the same vibratory movement the blade which is connected to it.

Such a device has been described in patents US -A- 3,611,568 (ALEXANDER ET AL.) Published on October 12, 1971, US -A- 3,636,627 (TIFFIN) published on January 25, 1972 and DE -A- 2,114 709 (GILLETTE) published on October 7, 1971. This device is also described in US patent -A- 2,054,418 (HARTMANN, née BOHM) published on September 15, 1936.

However, it should be noted that in the case of documents US -A- 3,636,627, DE -A- 2,114,709 and US -A-2,054,418 which describe razors in which the blade, of the traditional type , is positioned on its support by elements passing through openings in the said blade, it is necessary to reserve, between the positioning elements and the openings they pass through, sufficient play, of the order of a millimeter in total so as to facilitate the installation by the user of this blade devoid of any protection and very dangerous to handle because of the existence of these two opposite sharp edges. However, it is clear that the speed of rotation of the electric motor as described in each of these documents, is extremely fast and on the order of fifty to several hundred cycles per second. At such a speed of rotation, the inertia forces developed on the blade itself are of a non-negligible order of magnitude despite its low weight. Thus, it is made possible that despite the action of maintaining or adjusting the curvature of the blade exerted on the latter by the upper cover more or less tight in the direction of the correspondingly shaped blade support, is insufficient to oppose any movement of said blade relative to the holding elements. Now, it is established by experience that the amplitude of the vibratory movement defined above is in practice of an order of magnitude lower than that of the clearance reserved between the holding elements and the openings which they pass through.

It is thus established that, in the known devices which have just been mentioned, the repercussion of the vibratory movement determined by the motor, integral with the handle, on the blade itself, takes place in a very imperfect manner and most often nothing. It follows that the blade is in fact driven either by any relative movement relative to the direction of traction exerted on the handle by the user, or by an uncontrolled movement of very small amplitude, but nevertheless dangerous as for the risks of cut of the skin.

The main concern in a vibrating razor with a sharp blade must therefore be to ensure total solidarity at least in the direction of the sharp edge of the blade, between the latter and the handle which can still be designated as the gripping member. and traction.

In addition, it should be noted that the last three documents which have just been analyzed relate to razors in which the removable blade is completely unprotected as to the risk of cutting by its sharp edges. during the positioning and removal manipulations, which explains that for several decades, the preference of customers has been worn with regard to razors devoid of vibratory device, and practically exclusively, towards razors in which the blade is housed in a plastic support head generally mounted removably relative to the handle by means of sliding means transverse to the latter. The means, intended to allow the replacement of the blade holder head, are of different designs, but none is designed to oppose a slight displacement of the blade holder element under the effect of the forces of 'inertia developed on the blade or on the blade holder and which have been mentioned above; it is also necessary to see the reason in the reason in the fact that in such razors devoid of vibratory device, the question does not arise since¬ the forces exerted on the blade are limited to the pulling action which s 'performs in the axial direction of the handle that is to say perpendicular to the cutting edge of said blade.

With regard to document US -A- 3 611 568, apart from the observation that the razor described actually comprises a vibratory device housed axially in the sleeve and integral with it, there can be no comment with regard to possible elements for holding the blade relative to the upper part of the razor, no details being given on the point in the description and the blade only appearing completely symbolic under the reference 4 in FIG. 1. Furthermore, this document does not reveal any details with regard to a possible removableness of the upper part of the ra¬ evening designated by the reference 2 no more than a possible solidarity with the part lower or handle of the razor which carries the vibratory means. It should also be noted that the three claims granted to the United States are essentially directed towards one. very particular mode of fixing, inside the handle, of the bat- E REPLACEMENT engine power supply.

It should be understood that, in the following developments and for the sake of simplification of terminology, the term "blade" will designate both the blade itself as well as the assembly of the blade and of a carrier element, dis¬ tincture of the "razor head", carrier element in which it could, according to certain embodiments, be anchored in a solid fashion, the said assembly thus defined being, in this case, generally removable for replacement, after wear of the blade.

The invention makes it possible, in particular, to eliminate the drawbacks of the state of the art which have just been stated.

To this end, the invention relates to a vibrating razor with a sharp blade in which the blade is connected to a support by appropriate holding means, this support itself being connected to a handle or body of razor extending trans- - versal ent at the cutting edge of the blade and which constitutes the gripping and traction member of the razor, handle which has, in an integral manner, in its part which undergoes the gripping and traction action of the user, means for fixing an electric motor whose axis of rotation co-axial to the handle, carries on its end oriented towards the blade support and in an integral manner, an eccentric counterweight which, thus driven in rotation by the axis of the motor, determines the entry into vibration of the whole of the handle and of the blade support which is thus animated by a vibratory movement of substantially circular shape in a plane perpendicular to the axis of the motor, the cutting edge of the blade remaining substantially parallel to itself even under the gripping action of the user's hand, electrical supply means being also arranged in the end of the handle opposite to the head, characterized in that the razor body produced in a suitable plas¬ tic material present in its part close to the blade-holder head, firstly, cradle elements MPLACEMENT coming from molding and constituting the engine fixing means, on the other hand, an end part including the. (or the) face (s) end (s) oriented (s) towards the blade holder head is (are) arranged (s) to come into abutment with at least one of the corresponding faces thereof, a third part, means for detachably fixing the blade-holder head constituted by a well formed in the razor body and opening onto its said area (s). faces (s) ^" extremes (s), intended to receive by sliding in the razor body, transversely to the cutting edge of the blade, a locking plate carried by the corresponding face of the blade holder head, combined means of ver¬ removable rusting being carried respectively by the well and the locking plate and arranged so as to exert traction on said plate when the (or the) faces (s) corresponding (s) thereof and razor body arrived in mutual abutment, in order to ensure close contact of said corresponding faces, on the other hand, in that combined means of firm immobilization are provided between the blade and the head blade, and finally, in that, with a view to ensuring the narrow immobilization of the blade-holder head relative to the razor body, conjugate elements comprising faces transverse to the plane of the blade are formed respectively on the blade holder head and on the body of ra evening and arranged so as to come into close contact by said corresponding transverse faces when the head carries. blade and razor body have arrived at their mutual abutment position, the groups of transverse faces which thus come into close contact being at least two in number and arranged so as to obstruct, in respectively opposite directions, at relative movement of the blade head and the razor body parallel to the cutting edge of the blade.

The invention also relates to a method of manufacturing a

REPLACEMENT SHEET vibrating razor with blade as it has just been defined generally consisting in constituting the razor body in two half shells intended to be joined and soli¬ darisés on either side of a longitudi joint plane - nal extending from the extreme upper face of the razor body on which the locking well opens and substantially in the median plane of said well, until at the opposite extreme lower part of said razor body, the two half shells being said to be "ventral" as to that which is situated on the same side as the cutting edge of the blade and "dorsal" as to the other, the set of said half shells being intended to constitute a hollow case, each of them having on its internal face of the conjugated elements coming from molding, for example in the form of strips, arranged so as to constitute by their meeting opposite, on the one hand, the transverse walls of the well of locking thus formed between the free edgesd es corresponding lamellae, the side walls of the well being constituted by similar lamellae carried by the ventral half-shell and carrying, by molding, projecting elements facing each other and constituting, by the elasticity of the constituent plastic lamellae which carry them, locking elements intended to cooperate with corresponding notches formed on the edges making them opposite the said locking plate, on the other hand, cradle elements arranged so as to embrace and immobilize the motor both in the direction parallel to its axis of rotation and in the plane transverse to the latter, thirdly, to be fitted on the internal face of the ventral shell, two insulated metal strips one on the other and each extending by one of their ends respectively up to the level of two contact elements carried by the motor on the ventral surface corr.es- pondante and arranged by their rs opposite ends so as to ensure contact with an electric battery mentation housed in the lower end of the razor body, on the other hand, to put the motor in place between the cradle elements of the ventral shell so that the contact elements which it carries come into contact with corresponding ends of said metal strips, on the other hand, to ensure the coincidence of the dorsal and ventral shells, the cradle elements which are formed on their internal faces being arranged so as to ensure that they are held in place of the motor, on the sixth hand, to secure by all appropriate means said ventral and dor¬ dirty shells, in particular at the level of their part corresponding to the upper and lower end parts of the razor body and finally, to carry out place of the blade-holder head by sliding its rust-proof plate into the locking well until its face oriented towards the end face of the razor body v ienne in abutment against the latter with cooperation of the combined locking elements arranged on the wafer and in the well.

Other particularities will appear on reading the description which follows of several embodiments of the razor according to the invention, made with reference to the appended drawings in which: FIGS. 1A, 1B, are sections with cutaway and elé ¬ partial elevations by II in FIGS. 2A, 2B, made along the joint plane of the two half shells, constituting the razor body and its extension in the blade support head, the upper part of FIG. IA being shown in dashed outline and in detail, clearly enlarged in FIG. 1B, FIGS. 2A, 2B, are similar sections by II-II of FIGS. 1A, 1B, produced and enlarged under the same conditions as above, FIGS. 3, 4 and 5 are sections with partial elevations respectively by III-III, IV-IV and VV of FIG. 2,

REPLACEMENT SHEET FIG. 6 is an exploded view of the blade holder head,

FIG. 7 is a theoretical schematic representation of the trajectory of a point on the blade when the gripping member is simply held between the fingers of the user and in the absence of any contact with the surface to be shaved ,

Figure 8 is a theoretical schematic view similar to Figure 7 of the trajectory of the same point of the blade during the shaving action.

FIG. 9 is a schematic elevation view of an alternative embodiment,

FIG. 10 is a partial view on a large scale of the embodiment of FIGS. 1 to 7 as regards the mode of cooperation of the conjugate locking elements, respectively carried by the ver¬ rusting plate and by the lateral slats of the rusting well,

FIGS. 11 and 12 are the plan views of the half ventral and dorsal half of the razor body, respectively, according to another embodiment,

Figures 13 and 14 are sections with partial elevation - ^• respectively according to XIII-XIII and XIV-XIV of Figures 11 and 12, -the lower part of each of them having been torn off since its details are not part of the invention,

FIG. 15 is a section similar to FIGS. 13 and 14 showing, schematically and partially cut away, the initial phase of the positioning of the motor on

REPLACEMENT SHEET his cradle.

FIG. 16 is a view similar to FIG. 15 after the dorsal and ventral shells have coincided,

FIG. 17 is a diagrammatic view of the rotary bayonet plug intended to be introduced into the lower part of the body of the razor formed in FIG. 16 and intended to maintain the electric battery (not shown) and the electrical connection between the negative pole of the engine supply battery and the corresponding contact metal strip,

FIGS. 18 and 19 are sections respectively by XVIII-XVIII and XIX-XIX of the ventral part of FIG. 15,

FIG. 20 is a similar section on a larger scale by XX- X of FIG. 15, -

Figure 21 is a partial elevational view schemati¬ that a razor body according to Figure 16, provided with its blade holder head

and FIG. 22, a large-scale section with partial elevation of the blade holder head of FIG. 21.

In FIGS. 1 to 8, 1 designates the blade whose edge tran¬ edge carries _* > the reference 2. 3 designates the whole of a blade support head which comprises an upper cover 4 bearing, perpendicular to its lower face intended to receive the blade, a locking plate 26.

The support head 3 is held, in a removable manner and by means which will be described below, in close contact by its lower face 3A with the corresponding face 6A of the upper upper part 6 of the razor body 5. The razor body 5 consists of two half-shells 51, 52, arranged on either side of a joint plane 50 and they are made of plastic material for the sake of lightness and ease of assembly of the constituent elements, as will be explained below.

With the exception of the blade 1, the assembly of the support head 3 is also made, for the same reasons, of plastic material.

As indicated in the introduction, the razor body 5 extends perpendicular to the cutting edge 2.

Outside the cover 4, the support head 3 carries, on its lower face 30, receiving the blade, and perpendicular to this face, the locking plate 26 which is integral therewith. This plate 26 is intended to be introduced with a j.eu as reduced as possible considered tan in the direction of the cutting edge of the blade than in the direction perpendicular to the latter, in a well 31 of corresponding dimensions arranged in the part upper end 6 of the razor body 5 with which the lower face 30 of the support head 3 is intended to come into close contact with the interposition of the blade and, optionally of a cover 37 intended to mask the latter and whose other functions will be described in detail below.

The well 31 extends in the said upper end portion 6 longitudinally thereto, that is to say transversely to the cutting edge 2 of the blade 1.

The underside 30 of the cover 4 is substantially flat and has a length at least equal to that of the blade which is intended to come into contact with it.

Said lower face 30 of the cover 4 carries, in the middle of its length, the locking plate 26 which is

REPLACEMENT SHEET integral and ensures the narrow positioning and locking of the support head by its lower peripheral edge 3A on the extreme upper face 6A of the razor body 5. For this purpose, said wafer 26 has in the vicinity of its free end 33, opposite the cover, 4 and on each of its lateral edges, respectively two notches 34 intended to cooperate with elastic locking means carrying, in the vicinity of their free ends, a boss 35 in the form of a spherical cap or in the form of a segment of sphere or cylinder intended for cooperate closely, with the corresponding notch 34. Each elastic means is constituted by a strip 27 secured to the inner wall 36 of the upper part 6 of the razor body 5.

Furthermore, the lateral edges 49 of the plate 26 present at the end portion 33 of said plate a bevel shape 43 intended to facilitate the introduction of the plate 26 into the well 31 as well as the erasure of the elastic locking means 27/35 before they penetrate into their corresponding slots 34 in order to ^• achieve said narrow locking of the support head 3 on the upper part 6 of the razor body 5.

The locking elements 35 cooperate with the notches 34 by a face 34A thereof inclined towards the blade 1, so as to allow the withdrawal of the support head by simple traction exerted on the latter, traction which determines the spacing lamellae 27 by cooperation of the faces 34A of the notches 34 with the inclined faces 35A which make them opposite the locking elements 35.

As shown on a larger scale in Figure 10

IS LYING which shows the plate 25 (partially shown) in its locking position between the lamellae 27 (only one of which is shown), it appears that, with a view to said locking, the boss 35 is arranged on the nipple 27 so that its face 35A opposite to the lower face 30 of the cover 4, comes to cooperate elastically and firmly with the face 34A of the notch oriented in an inclined manner, in the direction of the blade 1 and of the lower ace 30 of the cover, without, in this locking position, the top 35B of the locking boss 35 being able to come into contact with the bottom 34B of the notch 34. As a result, the part 35A of the locking boss 35 subjects the inclined face 34A of the notch 34 at a force determined by the elastic pressure exerted by the lamellae 27 of which the said bosses are integral and which are formed for this purpose in the extreme upper part, of which they are integral, dumancheoucorpsde ra s oir5. The lower edge ^' 3A of the cover 4 then being, by definition. from its locking position, in close contact with ^'the upper end face 6A of the body 5, the locking plate 26 is therefore subjected to a health compo¬ of said force acting in the direction opposite to the face 30 in which it is solidarity, material direction. Seed in Figure 10 by the arrow FI, this component firmly applying said lower edge 3A of the cover 4 of the support head 3. against the end face 6A. body 5.

In practice, and taking into account the need to maintain the possibility of withdrawing the support head 3 by a pull exerted opposite the arrow FI, it can be considered that the optimal angle of inclination of the face 34A of the notch 34 relative to the lateral face such as 49 of the plate 26 on which • it is formed is of the order of 30 ° to 45 °.

REPLACEMENT SHEET In addition, the lower face 30 of the door cover, substantially in the mean plane of the plate 26, respectively at least two nipples 32 hot-swappable for the purpose of fixing the blade 1, suitably perforated at 39.40, so as to be traversed, practically without play, by said pins 32 and by the plate 26 for locking and positioning.

Finally, the blade 1 is covered by a cover 37 in the form of a plate of length substantially equal to that of the said blade 1 and perforated at 41, 42 in the same way as the latter, the pins 32 being of such length that 'after the blade 1 has been put in place until it comes to bear against the underside 30 of the cover 4, the locking plate 26 and the pins 32 passing through their corresponding openings respectively, the said pins protrude slightly above the cover 37 so as to allow them to be subjected to hot crushing with a view to firmly joining together with respect to each other the various censtituent elements of the support head 3 and, in particular, the firm fixing of the blade 1 with respect to these.

To this end, and in order to facilitate the operation, the cover 37 advantageously has the shape of a wedge, the thinner edge 44 of which is intended to be adjacent to the cutting edge 2 of the blade 1, while its longitudinal edge opposite 45 is substantially thicker so as to allow, in the intermediate longitudinal part 46, thus made thicker at the level of the studs 42, the formation of housings 47 formed in the thickness of the cover, intended to receive the extreme part of the nipples which form a thin head after hot crushing.

Of course, and according to a conventional arrangement, the locking plate 26 and the pins 32 are dimensioned and arranged so that, after assembly, the cutting edge 2 of the blade 1 is slightly projecting from the edges corresponding longitudinal sides of cover 4 and cover 37.

In order to improve the solidarity of the support head 3 with the upper part of the razor body 5, said support head still carries, preferably at each of its ends and parallel to the median plane of the perpendicular locking plate 26 at the cutting edge 2 of the blade, respectively two transverse extensions in the form of an ear 58, intended to cooperate closely with two housings 59 of corresponding shape formed in the side walls 60 of said upper part; this cooperation takes place both by the faces facing one another 61, 62 of said ears and by their faces 63 corresponding to the end faces 64 of said housings, the faces 63 and the end faces 64 being transverse to the median plane of the locking plate 26 and thus completing the arrangement, practically without play, of the latter in its well 31.

According to an advantageous arrangement, the cover 4 of the blade support head 3 has at each end of its upper part 29, a gripping boss 65 intended to facilitate the extraction of said support head from its well 31.

Finally, the support head 3 has, in front of the edge tran¬ edge of the blade 1 and a short distance from the latter, an element coming from molding and parallel to said cutting edge which forms, is opposite to that -this, a security guard 66; this safety guard is, in the example, connected to each of the ends, of which it is integral, with the cover 4 by the transverse extensions thereof which constitute the transverse holding ears 58.

In order to allow easy demolding, the well 31 is, in fact.

REPLACEMENT SHEET consisting, on the one hand, by the planes of the faces 48, oriented towards one another, of the strips 27 constituting the locking elements; the said faces 48 thus constitute the lateral kings of the well 31 of the plate 26 which cooperate closely with the lateral faces 49 of the said plate while the internal face of each of the half-shells 51-52 carries, in an integral manner, symmetrically with respect to the mean plane of the locking plate 26, between and parallel to the lamellae 27, respectively two groups of lamellae 28A, 28.B, coming from molding, oriented towards one another and constituting, by the extreme edges -57A, 57B, of said lamellae arranged parallel to the lock plate, the transverse walls of the well 31.

The razor body 5 is, as has been said previously, constituted by the two half-shells 51, 52 arranged on either side of their longitudinal joint plane 50 which extends from the upper part 6 carrying the head support up to its opposite lower end portion '23 which carries the actuator button 56 and the element 56A intended to establish contact between the conductive strip 55 of one of the two contact strips 80 by which the motor 7, which will be described below, is supplied, - and the corresponding pole of the battery 82.

The two half-shells 51, 52 are made integral by assembly means constituted, at their part close to _# the support head, by a screw 69 which crosses the bottom of a well 70 coming from molding with the half-shell 52, the said screw cooperating with a corresponding borehole 71 formed in a pillar 72 coming from molding and integral with the other half-shell 51; at their opposite part 23, the half-coquil¬ are made integral for example by gluing or snap-fastening by a ring 73.

The element ensuring the movement of the blade holder head 3 soli¬ daire the blade and the razor body as it was said above is constituted by an electric motor 7 fixed in REPLACEMENT the upper part of said razor body and supplied by the electric battery 82 via the contact strips 54, 55 fixed by hot crushing of the pins 83, 83A which pass through them, with the interposition of an insulating plate 84, which come , by simple elastic contact being made during assembly with the connection bars 80, make the said electrical supply to the motor 7.

The motor 7 has a rotor axis 12, the said rotor not being shown in the figures, but arranged in a well known manner in the stator 10.

The axis of rotation 12 pivots in the bearings 19, 20 and it carries, on its end oriented towards the support head, an eccentric counterweight 11 which communicates with the support head 3 carrying the blade 1 and with the razor body 5 of which it is made integral, a vibratory movement which determines each point of the blade to be made, as has been shown - on a large scale in FIG. 7, a _. pseudo-circular path 8 when said member 5 is held slightly in hand by the operator without contact with the area to be shaved, the cutting edge 2 remaining substantially parallel to itself.

When the support head and the blade come into contact with the area to be shaved and that traction is applied to the razor body 5 by the user, the trajectory of said points of the blade, in particular of its cutting edge 2, undergoes a significant flattening in the direction of the shaving traction and thus takes, as shown at 9 in FIG. 8, a pseudo-elliptical shape, elongated in the direction of said cutting edge, itself substantially perpendicular to said direction of traction.

The gripping action of the user is carried out substantially at the point 5A shown in FIG. 2 substantially at the lower third of the length of the entire razor. It follows that the gripping action determines. in addition, perpendicular to the cutting edge of the blade, a movement which is exerted alternately, at each rotation cycle, in the direction of the area to be shaved or on the skin of the user then in the opposite direction, substantially in a plane 21 perpendicular to the axis 12 and which makes, with the plane 22 of the blade, an angle A which has been chosen expéri¬ mentally as between 15 ° and 35 ° and preferably substantially equal to 25 °.

The movement of the blade which has just been defined as to its direction perpendicular to the cutting edge 2, is in fact analyzed in a series of percussions and rapid withdrawals which, as well complete the action of pressures or rapid percussions alternating tending to favor the insertion of the cutting edge in the hair, that the relief of the rotation of the motor during the withdrawal which immediately follows this percussion action.

As follows from the preceding statements, the angle of inclination B of the plane of the blade relative to the axis 12 of the rotor is complementary to the angle A and approximately between 55 ° and 75 ° and, preferably substantially around 65 °.

Furthermore, in the embodiment shown, the razor body 5 has a portion 24 remote from the blade 1 and close to its end 23 opposite to said blade, which has an axis of symmetry 25, from the level of the end of the motor 7, located opposite the blade tan¬ say that the axis of the motor forms, with the said axis of symmetry, an obtuse angle open; in the direction (F) of the area to be shaved and between 165 ° and 145 degrees and preferably of the order of 155 °, this resulting from experimental observations.

The engine rotational speed that determines the frequency of movement of ^"the blade is advantageously between 100 and 200 cycles / second and preferably substan- ment of the order of 150 cycles / second.

As it appears in FIGS. 1 to 5, the motor 7 is held in a housing constituted by the assembly of the ventral half-shell 51 and the golden half-shell 52.

The stator of this motor has a flat part 89 which cooperates, on the side of the dorsal part, with the longitudinal strips 13 integral with the latter so as to prohibit its rotation relative to a razor 5.

On the side of the ventral part, the motor rests on elements or lamellae 14 coming from molding and forming cradle.

At its part 67 oriented in the direction of the support head 3, the motor is held by the blades 15, 16 which cooperate with the bearing 20, while at its opposite end 68 it is held by the blades 17, 18 which cooperate with the bearing 19, all of these different strips 13 to 18 coming from molding constituting a logs ent which firmly maintains the motor 7 in all directions and which prohibits its rotation relative to aucor D sdera _¬ itself r 5 .

In FIG. 9, a slightly different embodiment has been shown comprising a support head with blade with two parallel and opposite cutting edges 102A, 102B, symmetrical in relation to a plane of symmetry 103 and possibly alternately usable, in a known way. The ears 104 of the head have end edges 105 cooperating with the end walls 106 of the corresponding housings which extend symmetrically with respect to the plane 103, the mean plane, or of symmetry of the locking plate, (not shown, as well as its corresponding well, in the schematic drawing of FIG. 9) _f being

REPLACEMENT SHEET confused with said plane 103 so as to allow re¬ turning of the head after wear of the cutting edge 102A. For the rest, the constitution of the head and of its locking systems is the same as that previously described in FIGS. 1 to 6.

It should be noted that, in this example, the fact that the end edges 105 of the ears 104 of the support head which cooperate closely with the diverging end walls 106 of the corresponding housings extend with the said walls 106 symmetrically with respect to the plane of symmetry of the locking plate, forming between -π-- a certain angle, less than 180 °, produced due to the traction exerted towards the razor body in the plane 103 by the elements locking the wafer, a very effective immobilization of the support head, dirty to the sharp edge then in use in the also symmetrical angular housings formed by them. ^' said end walls 106, immobilization which complè¬ te the security of the device by making impossible an anarchic and dangerous movement of the blade relative to the razor body.

Figures 11 to 20 are more especially intended for the re¬ present method for manufacturing the razor mentioned in the description, this manufacturing method being more particularly intended to allow rapid construction and little _ι expensive stage in the shaver of the assembly of its various constituent parts, the main ones of which have been referenced by increasing by 200 units, the reference figures used in Figures IA to 8 and 10 for the elements of these homologous or substantially corresponding figures of a mode of achievement to another.

ISA / EP REPLACEMENT SHEET In said FIGS. 11 to 20, the manufacturing process consists in forming, by molding, the two ventral half-shells 251 and dorsal 252.

The half-shell 251 has, for molding, on its internal face the elastic strips 227 which carry the locking bosses 235 intended to cooperate with the notches of the locking plate not shown in said figures. Said internal face also carries the lamellae 228B which are intended to constitute - by their extreme edges 257B one of the transverse walls of the locking well 231 whose other transverse wall is constituted by the extreme edges 257A of the lamellae 228A carried by the internal face of the dorsal half-shell 252.

The two half shells 251 and 252 are intended to be joined and secured on either side of a longitudinal joint plane 250. The ventral half shell carries the protruding element 215 forming a fork 215A intended to receive the front bearing of the motor 207 while the latch-shaped locking element 218 is intended to support the rear bearing of said motor.

Between these two elements, a cradle element has formed, forming an elastic clamp 214 intended to temporarily receive and immobilize the motor 207 during assembly, both by its elastic branches 214 which embrace the cylindrical part of the motor and the flat part. ¬ the ventral 289A of said motor.

On the dorsal shell, the locking elements of the dorsal flat part 289 consist of two housings 213 formed in the dorsal wall of the half shell 252 and which constitute, on the one hand, by their flat faces 213A formed in the extension one of the other the elements for holding the motor 207 and for preventing the rotation of its stator 210 after coincidence

ENT of the two half shells in the position of FIG. 16. Furthermore, the opposite end faces 213B of said lo¬ gements constitute, in the same position, immobilizing elements of the motor 207.

The connecting elements of the engine with the electric supply battery have not been shown in Figures 11 to 20 and it will suffice to refer to Figures 1 and 2 where the contact strips from the engine bear the reference 80 and provide the electrical connection by simple elastic contact with the metal blades 54, 55 respectively connected to the positive and negative poles of the electric cell by means of a contact plug such as 56A which has only been shown very schematically in FIG. 17 where it bears the reference 256A and where we notice the spring contact elements 256B intended for future wear on the corresponding metal blade such as the blade 55 (FIG. 2) and establish the circuit with the negative pole of the electric cell 82 such as by ^• means of the electrical connection 256C shown schematically in broken lines and the contact pad 256D. As defined in the introduction, the method of manufacturing and mounting the body of the razor consists first of all in placing the motor in the ventral half-shell between the projecting element 215 and the element in shape lamella 218, the front bearing being introduced into the fork 215A while the motor body is embraced by the elastic branches 214 and thus held provisionally in place. In this position and as it appears in FIGS. 1 and 2, the bars 80 coming from the engine come elastically into contact with the lamellae 54 and 55.

It then suffices to bring together the dorsal and ventral half shells 252, 251, ^' according to their joint plane, the dorsal flat part 289 coming to be embedded in the housings 213, then to put in place, on the one hand, on the end

REPLACEMENT SHEET lower of the razor body the assembly ring 273 by snap-fastening of its pins 273 A in the housings 273B provided for this purpose on each of the half-shells, then to put the assembly screw in place as shown in 69 aux Figures 1 and 2 in the well 270 des¬ tiné to receive it and to perform the screwing in the bore 271 of the pillar 272 and finally, to introduce, by longitudinal sliding, the locking plate of the blade holder head as shown at 226 in Figure 22.

FIG. 21 shows, in partial schematic elevation, the body of such a razor constituted by the half shells 251, 252 and which, at its upper part carries the head, support for the blade 203 formed by the cover 204 which carries the ears 258 locking and inside which is fitted the blade cover 237 fixed with the interposition of the blade not shown on the underside 230 of the cover by hot crushing of the pins coming from molding as indicated in the description of the figure 6.

It should be noted that in this embodiment which corresponds to that of FIGS. 11 to 20, the ears 258 of the head 203 cooperate by their faces 263 symmetrically arranged relative to the axis M of the locking plate with the end walls 264 of the corresponding housings formed at the end of the body of the razor and that, in addition, the upper faces 275 of the end part of the razor body which also form an obtuse angle between them similar to the preceding cooperate with the faces 276 of the blade cover 237 which form the same angle between them.

It is clear that the locking thus achieved by coopé¬ ration of the faces 263 and 264 on the one hand and 275, 276 on the other hand makes it impossible to move the blade holder head transversely to the cutting edge, due to the ac ¬ traction exerted on the head by the elements locking pads of the locking pad.

Claims

1. Vibrating razor with a sharp blade in which the blade is connected to a support by appropriate means of main¬ tien, this support being itself connected to a handle or body of razor extending transversely to the cutting edge of the blade and which constitutes the gripping and trac¬ ing member of the razor, handle which has, in an integral manner, in its part which undergoes the gripping and trac¬ ing action of the user, means for fixing a electric motor whose axis of rotation co-axial with the handle, carries on its end oriented towards the blade support and in an integral manner, an eccentric counterweight which, thus driven in rotation by the axis of the motor, determines the en¬ entry into vibration of the entire handle and the blade support which is thus animated by a vibratory movement of substantially circular shape in a plane perpendicular to the axis of the motor, the cutting edge of the blade remaining subs ¬ so parallel to itself under the action of grasping by the hand of the user, electrical supply means being also arranged in the end of the handle opposite the head, characterized in that the razor body (5), made of a suitable plastic material, present in its part (6) close to the blade holder head (3), on the one hand, cradle elements (13-18) coming from molding and constituting the means for fixing the motor (7), from a second part, an end part (6) whose end face (s) (6A, 64) oriented towards the blade holder head (3) is (are) arranged to come ^* in abutment with at least one of the corresponding faces (3A, 63) thereof, thirdly, means for detachably fixing the blade-holder head (3) constituted by a well (31 ) formed in the razor body (5) and opening onto its so-called end face (s) (6A) intended to be received by sliding in the razor body (5), trans¬ versally to the cutting edge (2) of the blade (1), a plate q locking plate (26) carried by the corresponding face dante (30) of the blade holder head (3), combined means of. removable locking (35,34) being carried respectively by the well (31) and the locking plate (26) and arranged so as to exert traction on said plate when the corresponding face (s) ( s) (3, 6A) of the head (3) and of the razor body (5) have come into mutual abutment, with a view to ensuring close contact with said corresponding faces, on the other hand, in that combined means of firm immobilization (32, 37, 40, 42) are arranged between the blade (1) and the blade-holder head (3), and finally in that, in order to ensure the narrow immobilization of the blade holder head (3) relative to the razor body (5), conjugate elements (58,59) having faces (59A, 59B and 61, 62) transverse to the plane of the blade (1) are formed respectively on the blade holder head (3) and on the razor body (5) and arranged so as to come into close contact by the said corresponding transverse dirty faces (59A, 59B and 61, 62) when the head carries blade (3) and the razor body (5) have arrived at their mutual abutment position, the groups of transver¬ dirty faces which thus come into close contact being at least two in number and arranged so as to obstruct, in respectively opposite directions, to the relative movement of the blade holder head (3) and the razor body (5) parallel to the cutting edge (2) of the blade (1).

2. Razor according to claim 1, characterized in that the motor is arranged so that the path (8, 9) described by each point of the cutting edge (2) of the blade

(1) is contained in a plane (21) inclined relative to the plane (22) of said blade (1), parallel to its cutting edge

(2) and extending, relative to the opposite end (23) of the razor body (5), above the plane (22) of said blade in the direction of the area to be shaved.

3. Razor according to claim 2, characterized in that -2, _7,

the angle of inclination (A) of the plane (22) of the blade (1), relative to the plane (21) of the trajectory described by each point of its cutting edge (2), or approximately between 15 ° and 35 ° and, preferably, substantially on the order of 25 °.

4. Razor according to one of claims 1 to 3, characterized in that the axis (12) of the rotor is inclined, relative to the plane of the blade, by an angle B, approximately between 55 degrees and 75 degrees and preferably substantially on the order of 65 degrees.

5. Razor according to one of claims 1 1 4, characterized in that the part (24) ducorpsdera¬ evening (5) distant from the blade (1) and close to its end (23) opposite to it, comprises an axis of symmetry (25) from the level of the end of the motor (7) situated opposite the blade and in that the axis of the motor forms, with, the said axis of symmetry, a obtuse angle open - in the direction (F) of the area to be shaved, between 165 and 145 degrees and preferably substantially around 155 degrees.

6. Razor according to one of claims 1 to 5, characterized in that the member (7) for generating movement is so arranged that the frequency of movement of the blade (1) is approximately between 100 and 200 periods per second and preferably ^to substantially in the order of 150 periods per second.

7. Razor according to one of claims 1 to 6, characterized in that the support head (3) of the blade consists: firstly, by a cover (4) of plastic material forming the upper part of the said support head, said cover (4) having an upper external face (29) extending in the lengthwise direction of the blade (1) and a substantially planar lower face (30).

REPLACEMENT SHEET of length at least equal to that of the latter on which are fitted, coming from molding:

- In the middle of its length, a plate (26) for locking and positioning the support head extending perpendicularly to said bottom face (30) of the cover (4) and intended to penetrate with as little play as possible (considered both in the direction of the cutting edge of the blade and in the direction perpendicular to the latter, and taking into account the possibility of introducing the locking plate) in a well (31) of dimensions corresponding arranged in the end or upper part (6) of the gripping and traction member (5) with which the lower face (30) of the support head (3) is intended to come into close contact. - On either side of said plate (26) and in the vicinity of its mean plane, respectively at least two pins (32) hot-swappable at their free end.

- Said plate (26) ^" for locking and positioning the support head (3) having, in the vicinity of its free end (33) opposite the cover (4), on each of its lateral edges, respectively two notches (34) each intended to cooperate with a corresponding resilient locking means (27/35), integral with the inner wall (36) of the upper part (6) of the razor body (5).

- Secondly, by the blade (1> ... itself, suitably _ openly perforated so as to be crossed, practically free from play at least by the pins (32) hot-swappable above mentioned, and possibly by the locking and positioning plate (26),

- thirdly, by a cover (37) in the form of a plate, of length substantially equal to that of the blade (1) and perforated in the same way as the latter,

REPLACEMENT SHEET the pins (32) being of such length that after the blade (1) has been put in place until it comes to bear against the underside (30) of the cover (4), the lock plate (26) and the nipples (32) passing through the corresponding openings, respectively (39, 40) and (41, 42) and, likewise, in the same way, after fitting the openwork cover until coming to bear against the blade ( 1), the so-called nipples (32) protrude slightly above the latter and can undergo hot crushing in order to firmly secure the various constituent elements of the support head (3) of the blade,

- The lateral edges (38) of the end part (33) of said plate 26 having a bevel shape (43) so as to facilitate the introduction of the plate (26) into the well (31) and the 'erasing the elastic locking means (27), 35) before they enter their corresponding notches (34) in order to achieve said locking of the support head (3) on said ^' upper part (6) of the razor body - (5).

8. A razor according to claim 7, characterized in that the cover (37) has the shape of a wedge, one of the longitudinal edges (44) of which is substantially thicker than its opposite longitudinal edge (45), so to allow, in the intermediate longitudinal part (46), the constitution, at the level of the openings of nipples (42), of housing -. ,, ments (47) intended to receive the extreme part of the nipples (32) after crushing hot.

9. A razor according to claim 7, characterized in that the elastic locking means consist of two strips (27) of plane perpendicular to the internal face (36) of the upper part of the razor (5), the said strips:

REPLACEMENT SHEET constituting by their faces (48) oriented towards one another, the side walls of the well of the locking plate (26) which cooperate with the lateral edges (49) of said plate,

- Each carrying at least one locking element (35) of which they ensure, by their own elasticity that they have at their free lower end edges, the cooperation with the locking notches (34) of corresponding shape, arranged in the vicinity of the extreme part of the plate (26),

- The locking elements (35) being constituted by bosses coming from molding carried by said lamellae (27) and having, in the direction of the blade (1) and relative to the corresponding notches (34), a slight inclination of nature to allow the re¬ trait of the support head by simple traction exerted on the latter by the ends of its cover (4).

10. A razor according to claim 9, characterized in that the locking elements or bosses (35) are arranged on the lamellae (27) so that their faces (35A) opposite the lower face (30) of the cover (4) , cooperate resiliently and firmly with the faces (34A) of the corresponding notches in an inclined manner, in the direction of the blade (1) and of the lower face (30) of the cover, without in this locking position, for which the lower peripheral edge (3A) of the cover (4) is in contact with the extreme upper face ^" (6A). of the body (5), the vertices (35B) of the locking bosses (35) can come into contact with the bottom (34B) of the notch (34). As a result, the part (35A) of the locking boss (35) subjects the inclined face (34A) of the notch (34) determined by the elastic pressure exerted by the lamellae (27) of which the said bosses are integral and which are formed for this purpose in the upper upper part , of which they are integral, the handle or the body

REPLACEMENT SHEET (5). The lower edge (3A) of the cover (4) then being, by definition of its locking position, in close contact with the upper upper face (6A) of the body (5), the locking plate (26) is therefore subjected to a component of said force which acts in the opposite direction to the face

(30) of which it is integral, direction shown in FIG. 10 by the arrow (F), this component firmly applying the said lower edge (3A) of the cover- (4) of the support head (3) against the end face ( 6A) of the razor body (5).

11. A razor according to claim 10, characterized in that the optimal angle of inclination of the face (34A) of the locking notch (34) relative to the lateral face such as (49) of the insert (26) on which it is arranged, is of the order of 30 ° to 45 °.

12. Razor according to one of claims 1 to 11, caracté¬ ized in that the e c o r p s. derasoir (5) is constituted, on both sides of a longi¬ tudinal joint plane (50) extending from its upper part (6) carrying the support head to its lower end part opposite the latter, by two half shells called "ventral" as for that (51) which is located on the same side as the edge tran¬ song (2) of the blade, and "dorsal" as for the other shell (52), the whole said shells constituting a hollow case intended to receive, on the one hand, the free end of the locking plate (26) of the support head (3), on the other hand, the motor (7) and the eccentric flyweight (11) and finally the feed members (82) and connection (54, 55, 56) of the latter.

13. A razor according to claim 12, characterized in that each of the half-shells (52, 52) carries, between and prallelement to the planes of the faces (48) oriented towards one another, strips (27) constituting the side walls of the well

(31) of the locking plate (26) and, so

REPLACEMENT SHEET symmetrical with respect to the median plane thereof perpen¬ dicular to the cutting edge (2) of the blade (1), two groups of lamellae (28A, 28B), coming from molding, oriented towards one another , whose end edges (57A, 57B) parallel to said locking plate constitute the wall elements of the well (31) complementary to said strips (27) and constituting the transverse walls of the well, so as to produce the latter this.

14. Razor according to one of claims 1 to 13, characterized in that the support head (3) of the blade (1) carries at each of its ends and parallel to the median plane of the locking plate (26) perpendicular to the cutting edge (2) of the blade, respectively two transverse ear-shaped extensions (58) intended to cooperate closely with two correspondingly-shaped housings (59) formed in the side walls (60) of the upper part ducorpsderasoiras (5), both by the faces facing one another (61, 62 of the ears (58) and the faces (59A, 59B) of the housings (59) and by their edges (63) corresponding to the walls end (64) of said housing (59), transverse to said median plane, in order to complete the positioning action of the support head (3) resulting from the arrangement of the lock plate (26) in its well (31).

15. Razor according to one of claims 1 to 14, charac- ^• • terized in that the cover (4) of the blade support head (3) has at its upper part and at each of its ends a gripping boss (65) intended to facilitate the extraction of said support head.

16. Razor according to one of claims 1 to 15, charac¬ terized in that the blade support head (3) has in front of the cutting edge of the blade (1) and a short distance from the latter, a element coming from molding parallel to the said

REPLACEMENT SHEET edge and forming security guard {66) connected at each of its ends to the cover (4) by the transverse extensions thereof forming transver¬ sal retaining ears (58).

17. Razor according to one of claims 1 to 16, charac¬ terized in that the stator (10) of the electric motor (7) comprises at least one flat part (89) intended to cooperate with a plurality of elements such as strips (13, 14) of the extreme edges of corresponding shape formed on the internal face of at least one of the half-shells (51 and / or 52) in order to prohibit the relative rotation of the said stator (10) relative to the body δ ir (5) and, as for the lamellae (14) from the plane transverse to the axis (12) of the motor, to constitute a cradle for ^" positioning said stator during the corresponding operation of placing the engine in the half-shell.

18. A razor according to claim 17, characterized in that each half-shell (51,52) comprises a plurality of strips (15, 16 and 17,18) for holding the stator (10) in the longitudinal direction substantially cooperating with its part end (67) oriented towards the support head (3) for the lamellae (15,16) and with its opposite extreme part (68) for the lamellae (17 and 18), so as to constitute, for the said stator, in cooperation with the slats (13 and 14), a longitudinal retention housing after the final assembly of the half shells.

19. Razor according to one of claims 1 to 18, charac¬ terized in that the means for assembling the half-shells (51 and 52) consist on the one hand, between the well (31) and the eccentric flyweight (11), by a screw (69) passing through

REPLACEMENT SHEET the bottom of a well (70) coming from molding with the dorsal half-shell (52), the said screw (69) cooperating with a corresponding drilling (71) formed in a pillar (72) coming from molding with the ventral half-shell (51), and on the other hand, at the opposite end (23), by a ring (73) tightly enclosing the corresponding ends of the half shells to which it is secured by gluing or snap-fastening.

20. Razor, according to one of claims 1 to 19, wherein the blade comprises in its plane, in known manner, two cutting edges (102A, 102B) of parallel direction, oppo¬ ed, on either side the surface of said blade, relative to a plane of symmetry (103), characterized in that, firstly, the mean plane or plane of symmetry of the locking plate is coincident with said plane of symmetry (103) of said cutting edges (102A, 102B) perpendicular to the plane of the blade, the locking well being • arranged correspondingly, secondly, that the end edges (105) ears (104) extend symmetrically and at an angle less than 180 ° on either side of said mean plane of symmetry (103), the edges of the corresponding end walls (106) of the cooperating housings closely with said ears (104) being arranged in a corresponding manner, so as to allow: - either, after wear of one of the trenches ants of the blade, the withdrawal of the support head, its 180 ° reversal and its insertion into the well of this new orientation for a use carried out as previously unidirectionally, - either, in the absence of any notion of wear of one of the cutting edges of the blade, the possibility of shaving carried out alternately in one or the other of the two directions perpendicular to the two cutting edges (102A, 102b). and also to ensure, under the effect of the traction exerted towards the razor body, effective immobilization of the support head transversely to the cutting edge of the blade.