DE2348914A1 - ELECTRIC SHAVER WITH DETACHABLE SHAVING HEAD - Google Patents

Description

Patent attorneys Dipl.-Ing, F. Weickmann,

Dipl.-Ing. H.Weickmann, Dipl.-Phys Dr. K. Fincke Dipl.-Ing. F. A-Weickmann, Dipl.-Chem. B. Huber

8 MUNICH 86, THE SAHA POST BOX 860820.

MDHLSTRASSE 22, CALL NUMBER 983921/22

SCHICK Incorporated, 216 Greenfield Road, ■ Lancester,

Pennsylvania
V.St.A.

Electric shaver with removable shaving head.

The invention relates to electric dry shavers, specifically those with a removable shaving head.

It is extremely useful to make the shaving head of an electric razor detachable so that you can remove the pieces of hair can be removed from the shear blades, normally Pieces of hair are deposited in the shaving head and would collect there if not removed. A special need exists for a detachable shaving head that can be used in special for a ladies razor and the can also be operated by people with little mechanical knowledge without the risk of the user injure yourself, damage the shaving head or assemble the appliance incorrectly.

It is clear that the cleaning of the shaving head is part of it

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routine use of the shaver if the operations involved are simple, quick and essentially foolproof. It is therefore desirable a razor with these advantageous properties to accomplish.

The electric razor heads are operational connected to an electric motor, generally via a powerfully reciprocating drive arm. This is what makes it special necessary that the head can be easily and conveniently removed and reattached to the razor as required is that the head is attached in a manner that is resistant to both harsh mechanical handling and vibration as well withstands the forces of normal use.

The manufacture and sale of electric shavers is a highly competitive business »It is therefore necessary to that such razors including the receptacle and the holding means for the shaving head in a simple and economical Way can be produced

An electric razor intended for female use must also be quick and safe can serve to shave sharp-angled areas of skin and recessed areas such as legs, armpits or the like. He must also have a good appearance.

The present invention is concerned with an electrical To create a razor with a detachable shaving head that can be easily and quickly removed by the user and can also be easily reattached «

The invention also seeks to create a razor whose shaving head is also used by people for the purpose of cleaning with little mechanical knowledge conveniently and easily removed

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and can also be put back on without being put back on again or taking it off again, any errors may arise

The shaving of the invention should continue to be provided with shearing blades that can be removed and replaced by people with low manual skills and without special tools from denf · shaving head and from time to time ₀

The razor according to the invention is said to be relatively simple way to manufacture and assemble and, because of its simplicity in construction and composition, also in economic terms V / can be produced.

Finally, the razor according to the invention should also be a Have a pleasing appearance, i.e. it should have a well-proportioned, uniform, despite the fact that its shaving head can be removed To impress·

Further advantages and details of the invention can be found in the following description of an exemplary embodiment of the drawings. Show it:

Fig.1 is a perspective view of a razor for Ladies according to the invention;

FIG. 2 is an enlarged cross-section along line 2-2 of FIG Fig.1;

Pig.3 a cross-section as in Figo2, which schematically shows the shaving head Figure 3 shows how it is removed from the razor shown in Figures 1 and 2;

Pig.4 is a cross-sectional view taken along line 4-4 of Fig.2;

Figure 5 is an end view of the razor shown in Figure 1;

Pig.6 shows a cross section along the line 6-6 of Fig.2 through the Shaving head and part of the drive arm

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The female razor illustrated in the figures is indicated generally by the reference numeral 10 and comprises a Housing 12, which has a handle part 14 and a head part 16 · The head part 16 receives and holds the whole with it 18 designated shaving head and the overall designated 20 lamp part.

The shaving apparatus 10 also consists of an electric motor 22 and transmission means 24 »which include an eccentric 25, by which the rotational movement of the motor 22 is converted into a reciprocating movement of a drive arm 26, the operates the shaving head 18, on the underside 28 of the handle part 14 is a conventional and therefore not shown electrical Wire with plug attached, as well as a switch 30 for operation of the shaver 10.

The shaving head 18 is in an upwardly facing recess 32 arranged. This recess 32 is formed by an upwardly projecting side wall 34, a central wall 36 which is parallel to the side wall 34, and by end walls 38, 40. The central wall 36 separates the recess 32 from the lamp part 20. The housing 12 is formed by two shell-shaped parts 42, 44, which are made in one piece with opposing halves of the side walls 34 »36 and to form the complete Side walls 34, 36 abut one another in a common plane. It can be said that the parts 42, 44 are mirror images and it can be seen that the switch 30 and the motor 22 in the housing parts 42, 44 formed hollow handle part 14 are attached.

The end walls 38, 40 consist of integral extensions of the parts 42 or 44. The lower part of the recess 32 is formed by a wall 48 which consists of sections of the housing parts 42, 44 exists, which extend inwards in a common plane

A central opening 50 is made in the lower wall 48,

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through which the drive arm 26 extends, see Figs. 2 and 3. Between the housing parts 42, 44 there extends a fastening part 52 in the form of a large ¹¹ G ", which has a flat bridge part 54, around the parts 44, 42 in FIG the correct, adjoining position, as well as hook-like fingers 56, 58 at its ends, which protrude downward into recesses 60, 62 of the housing parts 42, 44 in order to grasp and secure these parts _e

The shaving head 18 is in the recess 32 by means of a spring-loaded East 66 supported · The latch 66 comprises a flat base part 68 which extends across the housing parts 42,44 and has tab-shaped end portions 70, 72 which engage in corresponding recesses 74, 76 in the housing portions 42, 44. It is important that there be at least a slight gap between the end portions 70, 72 and the adjoining walls of the recesses 74 or 76 remains, see Fig. 4 and 5

It is also important that in view of the usual manufacturing tolerances also between the sides of the end pieces 70, 72 and the opposite housing parts 42, 44 a certain Gap remains, with the result that with respect to the longitudinal dimensions, both laterally and longitudinally a certain amount Movement play of the detent 66 is possible. In addition, a slight angular rotation with respect to a plane is also perpendicular possible through the center of the base part 68.

The detent 66 also has a central opening 78 through which the drive arm 26 passes and in which it moves back and forth. the Detent 66 further comprises two pairs 80, 82 of opposing resilient detent springs 84-84. It is noted that the Detent 66 is elongated and that the elastic detent springs 84 - 84 are close to the end 70 and 72 of the detent 66, respectively. How one recognizes from Figures 2 and 3, the catch 66 consists of spring material which is shaped so that it extends laterally Detent springs 84 - 84, which are initially bent gently upwards, then to reverse their direction towards the housing part 68.

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turn, then run gently upwards again and again change their direction away from the housing part 68 upwards. The in it is the last-mentioned bent part 86-86 of the hasty springs which comes into engagement with the shaving head 18.

Despite the "soft" mounting by the flexible locking springs 84-84 and despite the relatively loose assembly of the latch 66 according to the invention, due to the in the description explained construction conditions of the shaving head 13 so on Razor 10 held that, in contrast to the shear blades still to be "described, it has no play during operation opposite the housing 12 has

Pig. 2 shows that the locking spring part 86 is not only used to align the shaving head 18 in its longitudinal direction, but also pulls this into the recess 32 and the slightly curved sides 90, 92 against the corresponding opposite sides 94 »96 which form part of the walls 34, 36, brings to the plant. In addition, it is an essential feature of the invention that the shaving head 18 is dimensioned such that that its ends 98, 100 fit in close contact between the end walls 38, 40 (see. Pig.4). As a partial result of these construction relationships. it can be seen that the shaving head 18 is securely in the recess without any intrinsic mobility during operation 32 is held.

An ejector for the shaving head is generally designated with 104, which has an external pusher 106 and two laterally extending eyes 108-108, which are in recesses 109 - 109 of the housing parts 42, 44 grip. The recesses 109-109 have an elongated shape and the ejector 104 can extend in the longitudinal direction of the handle of the razor up to the extreme positions shown in FIGS move·

The overall designated 18 shaving head consists of one

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a total of plastic molded base part 110, an outer Shear blade 112 received in a slot 114 of base 110, an inner shear blade assembly 116, Brushes 118-118 for straightening the hair on both sides of the outer blade 112 and cover plates 120-120. The Brushes 118-118 consist of tufts 119 that are in the base 110 are anchored. A middle part 121 of the Abdeokplatften 120 forms a plurality of fingers spaced from the base 110 lie und.sich extend laterally, with it contribute to keeping the tufts 119 in the desired perpendicular position to the base part 110.

As can be seen from the drawings, the shaving head 18 is laterally symmetrical in relation to a mean cross-sectional plane that extends transversely over the short dimension, as well as laterally symmetrical with respect to a mean cross-sectional plane that extends over the long dimension of the shaving head 18.

According to Pig. 2 and 6, the outer blade 112 has several Rows 122 of cutting teeth, as well as inwardly directed side parts 124, which with their rear end on the outside an inner U-shaped bridge member 126 are attached. The outer blade is made of flat material with elongated U-shaped incisions 113 »which extend between rows 122 of the cutting teeth. From 3? Ig · 6 you can see that that Bridge element 126 extends over the entire length of the outer blade 112 and that the lower part of the bridge element 126 has a central opening 128 through which the drive arm 26 passes, as well as a plurality of further openings which all around Bridge straps 131 form with retaining bosses 134, 136, the the bottom of the slot 114 in the base 110 in a snug fit taken to the outer blade 112 with respect to FIG to fix the base part 110 · The lower part of the outer blade 112 presses against the underside 138 of the slot 114, the side walls of the slot 114 lie tightly to the rear \ extending parts of the side walls 124, whereby

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drawn stability properties can be achieved. The inner blade assembly 116 includes a movable blade 140 and a spring element 142 for coupling the drive arm. The outer shape of the inner shear blade 140 is designed so that they fit into the inner shape of the outer blade 112 adds.

The inner blade 140 has a plurality of rows 143 of cutting teeth and is shaped so that there are recessed regions 144 below them. The recessed regions 144 receive recessed regions 123 and align the corresponding rows 122 and 123 of the inner and outer shear blades ο

As seen from the underside of the shear blade 140, it appears the center row 146 of the inner blade 140 as a recess. As can be seen in Figures 2 and 6, the extends Drive arm 26 in the region determined by the center row 146 of the inner shear blade 140. The end 148 of the driving bar 26 is received in a TJ-shaped catch 149 in a spring 142. The spring 142 has lateral arms 150, 152, at the ends of which holding parts 154 are arranged with clamps 156 which pass through openings 158 grip the inner blade 140. The inner blade 140 can move easily in the shaving head 112 · The through the tension of the spring 142 generated by the insertion of the end 148 into the detent 149 presses the cutting surfaces of the shear blade 140 evenly against the opposite surfaces on the blade 112.

The underside of the plastic base part 110 contains two pairs of opposing cutouts 160, 162 which are formed by undercut latching surfaces 164 - 164 which receive the latching springs 86 - 86 of the latch 66 .

The underside of the base 110 also contains a plurality of openings 168-168 through which one can use a small tool (not shown) against the lower part 128 of the bridge

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part 126 of the outer blade 112 can encounter. This makes it possible to use a set of outer blades 112 and inner To replace shear blades 116 without having to purchase a new base part 110 and the associated elements. To that To remove the blade 112 from the head 18, the head 18 first removed as if for cleaning, whereupon the blade 112 can be snapped out of the slot 114, e.g. by that you press the tip of a pencil through one of the openings 168-168 against the lower part.

? shows the shaving head 18 in a raised position, such as by him during the ejection from the recess 32 for Purpose of cleaning is taken. As already mentioned above, the ejector 104 can be in various positions in the longitudinal direction of the handle part 14. During ejection A surface 94 of the ejector 104 engages under the rounded side 90 of the shaving head 18 and pivots it. Because of the congruent formation of the locking parts 164 of the base part 110 and the detent springs 86 of the detent 66, as well as because of the tight The system of the lateral surface 90 of the shaving head 18 and the opposite surface 96 of the recess 32 rotates Shaving head 18 in the manner shown in Figure 3. The axis of rotation is substantially parallel to the long side direction of the shaving head 18, ie at right angles to the ends 38, 40. The shaving head 18 can be completely removed from the recess 32, for example in order to clean or replace it.

Since the shaving head 18 is laterally symmetrical, it does not matter in which orientation it is used again after cleaning.

Immediately when the shaving head 18 is released from the recess 32, the drive arm 26 ′ is released from the catch 149 of the spring 142 and the arm parts 150, 152 go because of the elasticity of Spring 142 immediately down * The inner blade 140 kaiin Slide freely along the length of the outer blade 112, but the spring 142 and the larger boss 134 act in the base

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110 together in such a way that the bosses 134 serve as stops, to prevent the inner blade 140 from inadvertently separating from the outer blade 112 and on to fall the ground. When the inner blade 140 is in a position in which the spring 142 has larger lobes 136 meets, then parts of the spring 142 can be done by hand be depressed, the blade 14.0 can be removed from the outer blade 112 by it after outside in the axial direction. The shear blade 140 can also be grasped with the fingers and simply pulled out, wherein the spring 142 gave way due to its neutral flexibility and pliability

The removal of the inner blade 140 facilitates cleaning of both the inner blade 140 and the outer blade 112. For example, a brush can be passed through the interior of the outer blade 112. The inner blade 140 can thereby be returned to its operating position relative to the outer blade 112 by reversing the steps described, whereby it is again worth mentioning that due to the all-round symmetry of the shaving head as a whole and in particular due to the all-round symmetry of the outer blade 112 and the inner shear blade 140 in the longitudinal sectional plane, the inner shear blade 140 can be inserted with either of its ends first into any of the ends of the outer shear blade 112, so that there is no correct or incorrect assembly.

18 to bring the shaving head back into the recess 32, one or the other side 90 of the shaving head on one or the other face 94 or 96 of the recess may or _e 92 is applied 32 in the housing 12, the locking springs 86 to 86 of the detent 66 to bring into locking engagement with the notches 164 - 164 on the underside of the base part 110 of the shaving head 18. Since the sides 94, 96 and also the opposite surfaces of the shaving head 18 are rounded, one leads inwards or

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Downward pressure on the shaving head 18 automatically results in a displacement in the longitudinal direction until the shaving head 18 through the latch 66 is secured in its correct position.

Another feature of the invention relates to the relationship between the two the lamp assembly 176 and the head part 16. The lamp assembly 176 consists of a light bulb 178, a receptacle 180, a divergent lens 182 and associated electrical switching parts, which are designated as a whole by 184. In this context useful lighting circuitry is disclosed in co-pending U.S. patent application Ser.No. 276,517 dated July 13, 1972 described.

In the embodiment shown, the shaving head 18 has a low profile, i.e. the outer blade 112 is not lying higher, but actually somewhat lower, than the associated end walls 38, 40 of the head part 16 of the housing 12

The shaving head 18 lies on an inclined part next to the divergent lens 182, the lens 182 being arranged so that it touches the user's skin immediately adjacent to the upper portion 186 of the Head part 16 illuminated. When the razor 10 is used in such a way that the shaving head 18 substantially is parallel to the skin of the user, the portion 186 of the head portion 16 of the housing is raised in a manner that the lens 182 is at an angle to the skin, resulting in increased illumination of the skin surface immediately in front of the skin Razor leads.

As can be seen, the razor according to the invention has one Shape of the head that is particularly suitable for shaving curves, angles, body cavities, etc. This makes it special suitable for shaving the legs, the forearms oodgl, it is also extremely convenient to remove the shaving head 18 for cleaning or replacement, as well as the shaving blade 112 to be removed from the base part 110 for replacement purposes. The Invention

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Dung is particularly suitable for a razor for women because it is not necessary to use the shaving head 18 with the device or the inner blade 140 or the outer blade 112 reassemble exactly with base 110 in any particular orientation. You can also use new blades can be easily and conveniently installed in the shaving head 18 without a tool

For example, one can separate the outer blade 112 from the base 110 by using the tip of a pencil pushes through opening 168 and a replaced blade is aligned in slot 114 and snaps into a secured one Bracket.

In addition, the shaving head 18 can be easily lifted from its detent 66.

It is also an additional advantage that the outer blade 112 is attached to a snap-on base 110 is. Because of the lifting effect of the ejector 104 described, the shaving head 18 is separated from the detent with one movement, which roughly corresponds to a rotation about an axis which is parallel to the longitudinal dimension of the shaving head 18. this means an advantage over ejectors, which give the shaving head a rolling or rotating movement around an axis that is parallel to the narrow dimension of the shaving head. As Polge This combination of structural elements, the end walls 30, 40 can be dimensioned in their distance from one another so that they take up the shaving head 18 in a tight fit, see Fig. 4 » This greatly increases the stability of the shaving head 18 with respect to its attachment to the housing 12, and it is special It is advantageous that the outer shear blade 112 has the same length as the base part 110, since this is ensured in an increased manner is that the end walls 58 ~ 40 meet the shaving head 18 Hold immobile during operation

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Claims (1)

23AB9U Claims 1 ,) Electric shaver with removable shaving head held in a recess of the apparatus and a reciprocating drive arm for actuating the shaving head, characterized in that the shaving head (18) has an elongated base part (110) with a longitudinal wall-forming slot ( 114), which extends essentially over the entire recess (32) of the apparatus (10) and is dimensioned in its longitudinal dimension so that the shaving head (18) between the end walls (38, 40) of the recess (32) in the A snug fit comes * ·· as well as an elongated outer blade (112), an inner blade (140) which is surrounded by the outer blade and biased against it, a bridge part (126) in the base part (110), which is the outer Shear blade tightly but detachably holds in the slot (114) opposing pairs of recesses (160, 162) in the base part (110) for receiving locking springs (86) one in the recess (32) of the apparatus s mounted latch (66), the recesses (160, 162) each absorbing oppositely directed forces in the direction of the narrow sides of the base part, and a coupling member (142-156) for connecting the drive arm (26) to the inner blade (140) so that this in The longitudinal direction of the base part (110) goes back and forth. 2e apparatus according to claim 1, characterized in that the outer shear blade (112) and the base part (110) have the same length and the outer shear blade also in a snug fit comes to lie between the end walls (38, 40) of the recess (32). 3 · Apparatus according to claim 1 or 2, characterized in that the outer blade (112) has rearward-facing parts (124) which are received in the slot (114) and have several 409816/0804 23489H have rere openings (131), and that in the lower part of the Slit (114) holding bosses (134, 136) are located, which engage in these openings and thereby the rearward facing Hold parts of the outer blade (112) and thus this itself on the base part (110). 4. Apparatus according to claim 3, characterized in that the base part (110) is close to the bottom of its slot (114) End openings (168) has access to the lower surfaces of the rearward-facing parts (124) of the outer The blade (112) in order to be able to push it out of the slot (114) 5. Apparatus according to one of Claims 1 to 4, characterized in that that the coupling member for connecting the drive arm 8 (26) to the inner shear blade (140) consists of a substantially downwardly bent spring (142), the ends (154) of which with the back of the inner blade (140) are connected and which has a downwardly open, TJ-shaped catch (149) for receiving the drive arm (26), and that when the detent (66) arranged in the recess (32) engages in the shaving head, this counteracts the force of the The spring (142) is pressed down on the drive arm (26), the inner being biased against the outer blade will· 6. Apparatus according to one of the preceding claims, characterized in that the shaving head (18) on both sides of the outer shaving blade (112) on the base part (110) in the longitudinal direction of the same in a row of brushes (118) for straightening the hair carries _o 7. Apparatus according to any one of the preceding claims, characterized characterized in that the shaving head (18) is laterally symmetrical with respect to a central cross-sectional plane over its short Dimension and also laterally symmetrical with respect to a central 403816/080 leren cross-sectional plane over its long dimension. 8. Apparatus according to one of claims 1 to 7, characterized in that the detent (66) for holding the shaving head (18) in the recess (32) has at least two pairs of opposing locking springs (86) which are in opposite Directions are tense when the shaving head is received in the recess, and that an ejector (104) is provided for the shaving head, which comprises a trigger (106) to be operated by the user, as well as eyes (108), which enter the recess (32) and against the underside of the shaving head on one of its longitudinal edges bump, rotating the shaving head about an axis parallel to its longitudinal axis and thereby releasing it from its detent Loosen (66) and tilt out of the recess (32) 9. Apparatus according to Claims 1 to 8, characterized in that in a plane offset with respect to the plane of the shear blade the A diffusion lens (182) of a lamp arrangement (176) which forms an acute angle with the skin of the user, when the shear blade plane is parallel to and in contact with the skin 10. Apparatus according to one of claims 1 to 9 »characterized in that that the longitudinal walls (34, 36) of the recess (32) have curved inner surfaces (94, 96), the curved Contact surfaces (90, 92) of the shaving head (18) correspond. 11. Apparatus according to any one of claims 6 to 10, characterized in that that the brush (118) consists of several dense tufts (119) which are attached to the base part (110), and that cover plates (120) are provided, a part (121) of which is spaced from the base part and the shape of fingers which extend between the tufts (119) in the direction of the edge of the base part and with their free Ends directly at the base. 409816/0804