DE1739409U - MAGNETIC DRIVE FOR DRY SHAVERS. - Google Patents

Description

Magnetic drive for dry shavers

The invention relates to a magnetic drive for dry razors with a vibrating armature on which a spring force acts as a restoring force acts.

In a known magnetic drive of this type, the spring force required for the action of the restoring force is applied the two arms of the oscillating armature. The spring - it is a leaf spring that is supported on the housing and presses with their ends against the arms of the oscillating armature - consequently takes part in the oscillating movements of the armature with greater force Part amplitude and thus increases the moment of inertia of the system oscillating armature plus spring in a disadvantageous manner.

These disadvantages do not arise in magnetic drives of the type mentioned at the beginning if, according to the invention, the spring force generating spring engages on the one hand in the oscillating armature axis of rotation on the oscillating armature and on the other hand on the stationary Part of the drive & fcft & HXXS. According to an expedient Further development of the invention, the axis of the oscillating armature itself acts as a torsion spring and is either simple or Multiple leaf springs or designed as a single or bundled bar spring. The armature axis itself provides the restoring force, with the help of which the system is tuned to the mains frequency. This will reduce the number of items required smaller and there is no annoying effect even with long-term use. Noise «caused by the otherwise unavoidable wear and tear of the Axle bearing. Furthermore, there is a weight saving and an easy adjustment option.

According to a further idea of the invention, the torsion spring should be used as an oscillation axis as far as possible through the center of gravity of the System and be performed perpendicular to the oscillation plane. This reduces the harmful inertia and vertical force Bending forces acting on the torsion spring are switched off . ■ '■ ..

Out "?"! ": This document (description and protection claim) is the last one submitted; it deviates from the word version of the documents originally submitted. The legal significance of the deviation has not been checked The originally submitted documents are in the official files. You can 'anytime without proof legal interest can be viewed free of charge. On request, photocopies or filnv negrt} r * e delivered su the usual prices. .;., _. German Potgbtamt, utility pieces.

69, 12. 1739409. AVOG electrical and ₇ __ _n , _, r

Feinmechanik GmbH, Bühlcrtal (Bad.) _ /.FEB. W5? ^

I Magnetic drive for dry shavers. ι '■''.

16.6.55. A 7247. (Part 3; line 1)

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To achieve great pulling power with small Schwingv / eite are ixaratoadsroEosm ^

B2öWKaf3s2H ^: those facing each other at the air gaps Areas of core and anchor through perpendicular to the direction of movement arranged groove interrupted. The increase in magnetic flux - related to the angle of rotation - is thus larger, which causes a corresponding increase in the tensile force. ;

Description:

Fig. 1 shows as an example a dry shaver with magnetic drive according to the concept of the invention in a simplified representation. In it 1 is the armature of the magnet system (cantilever) with the driver 2, which drives the cutter 3. 4 is the axis of the armature 1. 5 is the magnetic core of the field coils 6. When AC power is connected, the armature begins to oscillate which corresponds to twice the mains frequency. Between 1 and 5 there are the two magnetically effective gaps 7, which are subdivided in the illustration to increase the force / displacement ratio. 2 and 3 show, in side view and in section, the anchor with the torsion spring 4 built into it in a form-fitting manner as the axis. To increase the effective: spring length, it is only fastened in the middle of the anchor by means of two ⁷ ! Tabs Instead of the one leaf spring, a set of springs can also be used or, analogously, a single or a set of round torsion bars. Fig ^.; 4 shows another embodiment of the axle with suspension by two rubber washers 9, which are connected to the armature 1 on the one hand _; and the bearing 10 on the other hand are connected. In FIG. 5, as a further example, an axis 4 fixed on the frame is embedded in rubber 11 within the anchor. The embedding can be either ■ !. take place positively, or the axis is vulcanized. ■; ■ '.y. : i

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Claims (5)

I Magnetic drive for dry razors. 16. 6:55. A 7247LjXrj1 ^ Jl __ ^ _: AVOG 58 a ·. . 10/24/1956 'Claims 1.). Magnetic drive for dry razors with an oscillating armature, on which a spring force acts as a restoring force, characterized in that the spring generating the spring force engages on the one hand in the oscillating armature shaft on the oscillating armature and on the other hand engages on the stationary part of the driveϊϊΧϊϊΧϊϊ is supported. \ J., ■. 2.) Device according to claim iy, characterized in that the axis (4) of the armature (1) is designed as a torsion spring. 3.) Device according to claim 2, characterized in that as a torsion spring a single or multiple leaf or - Bar spring is used. (Fig. 2, 3) 4.) Device according to claim 2, characterized in that with a fixed axle (4) a rubber sleeve spring as the torsion spring (11) is used. (Fig. 5) _ 5.) Device according to Claim 2, characterized in that - that in the case of a rotatable axis (4) as torsion springs, two on both sides of the armature (1) pushed onto it, and with it and the bearing plates (10) are positively connected or vulcanized rubber bushings (9). (Fig. 4).