DE1228161B - Shaving head for a dry razor - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

B 26b

German class: 69 - 12/02

Number: 1228 161

File number: N 254871 c / 69

Filing date: September 9, 1964

Open date: November 3, 1966

The invention relates to a razor head for a dry razor, in which a razor plate together with the rotating cutting member against a spring pressure up to an end position at a stop can be depressed.

Such a razor head is known from German Auslegesehrift 1 053 970; on the other hand shows the German Auslegeschrift 1116 110 a dry shaver with a pliable shear screen as an upper knife on a lower knife that can be moved back and forth with spring means for pressing the lower and upper knife together. Here, the spring means be arranged in such a way that with increasing load, the increase in spring stiffness is steady or changes by leaps and bounds. In the embodiment shown, in order to avoid that of a certain pressure exerted on the shaving plate on the shaving plate in the vicinity of the pressure point something lifts off the lower knife as a result of a certain pre-tension in the plate and through the Lifting off the razor plate breaks the proposal made a spring with one as explained above Use spring characteristic.

With this known arrangement but the object of the invention, in the creation of two Shear blows for a sharp and an easy shave cannot be resolved. Like the suggestion for that shows a steady increase in the spring stiffness with this arrangement, such a task was not even present.

Furthermore, arrangements with a plurality of coil springs are known per se, which are used to achieve different Spring characteristics can be switched side by side or one behind the other, such as B. in the French Patent specification 1,335,018 for a truck suspension is described.

The above-mentioned object is achieved according to the invention with a razor head of the type mentioned at the beginning solved by using two lying in a known manner in series, in the Resilience unequal, helical springs, the weaker spring on that of the razor plate facing away and the stiffer spring on the side facing the shaving plate of a common, displaceably guided spring plate are arranged, which after limited compression of the weaker spring comes into engagement with a fixed stop.

Furthermore, on the side of the weaker spring in the direction of the center line of the drive spindle A support pin can be provided as a fixed stop against which the spring plate is pressed after being compressed the weaker spring thrusts.

Shaving head for a dry razor

Applicant:

N. V. Philips' Gloeilampenfabrieken,

Eindhoven (Netherlands)

Representative:

Dipl.-Ing. H. Auer, patent attorney,

Hamburg 1, Mönckebergstr. 7th

Named as inventor:

Jan van den Driest, Drachten (Netherlands)

Claimed priority:

Netherlands 13 September 1963 (297 911)

In a razor head according to the invention, in which the drive spindle is driven by a gear is, with a resiliently held coupling piece for the Uber-

a5 transmission of the movement to the knife accommodated is and wherein the coupling piece in the depressed position against the end of the in the direction of Center line extending support pin abuts, can after a further development of the inventive concept the weaker spring should be placed helically around the support pin and a base of the retractable, hollow coupling piece, which supports the stiffer spring held therein, the stop form on the support pin.

With this construction, the user can be responsible for certain parts of the skin surface to be shaved or only want a slight pressure for the entire surface, only when pressing the Use light spring pressure. The series connection results in a clearly noticeable Transition in the spring pressure when the light spring has reached its effective end position and the stiffer one Spring is pressed in, which from this moment on in a second pressure phase, the counter pressure takes over until the shaving plate hits a firm stop.

In this way, there is a good possibility of adaptation for the user, who clearly see the The transition from the first pressure phase to the second feels and, according to his choice, two different ones Can use spring pressure areas without a special changeover needs to be carried out.

609 709/41

The invention is explained below using an exemplary embodiment shown in the drawing.

The figure shows an axial section through the drive part for the rotating knife ring of a Dry shaver.

A razor plate 1 designed as a razor cap is placed against a razor plate 1 designed as a knife ring Cutting member 2 resiliently pressed by the rotating coupling piece 3, the coupling in known Way is made by a housed in a slot 5 spring element 6, the ends 7 in Recesses of a cap 8 attached to the cutting member 2 are fixed.

The stiffer spring 10 placed in series with a weaker spring 9 lies completely in the bore 11 of the coupling piece 3. The coupling piece 3 is in a central, an angular cross section having recess 12 in a rotating drive spindle driven by a gear 13 housed.

The springs 9 and 10 lie on both sides of a common spring plate 14, which has a bottom a sleeve 15 displaceable in the bore 11 forms.

The weak spring 9 is wound around a support pin 16 in a helical manner. This support pin 16 forms the end of an axis 17 about which the drive spindle 13 rotates. The spring 9 rests on the bottom part 18 of the recess 12 in the drive spindle 13th

When the shaving plate 1 is pressed in during shaving, the movement of the coupling piece 3 inwards over the spring 10, which is not yet compressed, and over the spring plate 14 transferred to the weak spring 9, which is compressed first. The one to be overcome Spring pressure is z. B. about 60 g. This pressure has already been overcome in the position shown in the drawing, so that the spring plate 14, which forms a bottom of the bushing 15 which can be pushed into the bore 11, has come to rest on the free end of the support pin 16. The stiffer spring 10 is between the top wall of the bore 11 and the spring plate 14 clamped, and up to the moment in question the spring plate 14 is supported on the stop formed by a ring 19 in the bore 11.

If the pressure of the shaving plate 1 on the skin is then increased, the coupling piece 3 slides over the socket 15 with entrainment of the ring 19 downwards. The spring plate 14 moves as a result inwardly into the bore 11, and the spring 10 is compressed. This can continue for so long until the lower edge 20 of the shaving plate 1 against that formed by the housing of the device fixed stop 12 abuts. The pressure on the razor head then has a value of e.g. B. reached about 400 g.

Claims (3)

Patent claims: 1. Shaving head for a dry razor, in which a razor plate together with a rotating Cutting member can be pressed against a spring pressure into an end position at a stop is characterized by the use of two in series with one another in a manner known per se lying, in the resilience unequal, helical springs, the weaker The spring (9) on the one facing away from the shaving plate (1) and the stiffer spring (10) on the one on the shaving plate (1) facing side of a common, displaceably guided spring plate (14) arranged . net are, which after limited compression of the weaker spring (9) in engagement with reaches a fixed stop (16). 2. Shaving head according to claim 1, characterized in that on the side of the weaker Spring (9) in the direction of the center line of the drive spindle (13) as a fixed stop (16) Support pin (16) is provided against which the spring plate (14) after the compression of the weaker spring (9). 3. Shaving head according to claim 1 or 2 with a drive spindle driven by a gear, wherein a central recess A spring-mounted coupling piece for the transmission of the movement to the knife is housed is and wherein the coupling piece in the depressed position against the end of the in direction the center line running support pin abuts, characterized in that the weaker Spring (9) is placed helically around the support pin (16) and a bottom of the retractable hollow coupling piece (15) which supports the stiffer spring (10) held therein, forms the stop on the support pin (16). Considered publications:
German Patent Nos. 1,053,970, 1116 110; French patent specification No. 1,335,018. 1 sheet of drawings 609 709/41 10. 66 ι Bundesdruckerei Berlin