SU449477A3 - Electric shaver - Google Patents

Description

The invention relates to the field of household appliances, in particular to an electric shaver. Known electric shaver containing. the body and the fixed upper knife mounted therein and connected to the drive and the lower knife mounted with the possibility of reciprocating movement. As a drive in a known electric shaver, an electromagnetic motor with an oscillating rotor is mainly used. Such a drive causes a significant vibration and sound during operation of the razor. : A distinctive feature of the proposed shaver is that its drive contains electrically connected two-layer piezoelectric oscillating transducers made of a ferroelectric ceramic material, such as barium titanate or zirconotitanate, mounted in a block connected to the lower knife. The unit includes two tires, one of which is rigidly mounted in the housing, and the second is connected to the lower blade by means of a transmission link. The transducers can be mounted: so that their surfaces face one another or are installed one near the other so that their ends face one another. The block contains a frame in which transducers are mounted, interconnected in the middle part of the frame by an intermediate link connected to the lower knife. It is advisable to install the frame so that its plane is parallel to the swing axis of the lower knife. The block may contain groups of transducers, each of which is connected to its corresponding lower knife, while the knives are installed with the possibility of reciprocal reciprocating movement, and may also contain groups of transducers connected by an intermediate link carrying the transfer element for communication with the lower knife. The block is connected to the lower knives by means of spring-loaded rods, and it is installed ifeur in the case.

The transmission link includes a rod mounted in the housing and sealing with a spring, with one end locked in the wall of the housing. The use of ferroelectric ceramic materials as transducers makes it possible to manufacture a vibrating motor with a high efficiency factor. In this case, the mechanical frequency of oscillations of the converters is determined by the frequency of the current supplied to the electric shaver.

The block is equipped with plate converters in an amount necessary to obtain a power drive of a given power.

The resonant frequency of the transducers is selected by 2-1O, mostly 3-5 Hz above the line frequency.

FIG. 1 and 2 show an electric shaver with a different embodiment of the lower knife; on fig.Z and 4 - converters mounted in tires; in fig. 5-9 are embodiments of an electric razor; FIG. 11 and 11 show the extreme positions of the transducers in operation; in fig. 12 - head of the electric shaver unassembled.

The shaver includes a housing 1 and a fixed upper knife 2 mounted therein and a movable lower knife 4 (knives) connected to the drive 3.

The drive contains electrically coupled two-layer piezoelectric oscillating transducers 5 made of a ferroelectric ceramic material, such as titanate or barium mipKOHOf titanate.

Each transducer is made in the form of a metal plate 6 covered on both sides with thin strips 7 made of a ferroelectric ceramic mat. The thickness of the plate 6 and the strips 7 is approximately the same and is 0.1 - O, 3 mm. The thickness of the plates and strips is selected so that the separate converters can operate from the network with a voltage of 11 ~ 125 V. AT,

In this case, two series-connected converters require an alternating current of 220 volts for their power supply.

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The transducers can have open bands 7 in the middle part, which allows them to be bent in different directions by means of an appropriate polarization 5 | opposite parts of the bands (see Fig.4). : Transducers can be mounted in block 8, which includes two | women 9,1O, one of which is tough

installed in the housing 1, and the other, through the middle of the transmission link 11, is connected with the lower knife. {In the particular case. The transfer link may be a ball: not in the form of a finger 12). ; The transmission link may include 15 rod 13, pivotally mounted in the housing 1 and connected to the spring 14, one end fixed in the wall "of the housing 1 (see Fig.9).

The transducers can be mounted so that their surfaces 15 are facing one another, and can be installed one near the other so that their ends 16 face one another. ; The block may contain a frame 17 with 5 converters that are connected

with each other in the middle part of the frame between the exact link 18, connected to the lower

knife 4. The frame 17 is set so that its plane is parallel to the axis 19 of rolling 0 of the lower knife (see Fig. 12).

The block may contain a group of 2O and 21 converters. Each such group is connected to its corresponding lower knife 4 and 22, with the knives installed. 5 i with the possibility of oncoming reciprocating movement (see Fig. 6). Groups 2O and 21 of the transducers are expediently connected by an intermediate link 23 carrying the transmission el &. 0 cop, executed in the form of a finger 12. Transformers are inserted into slots 24 9 and 10 and filled with resin. Under

by the action of the voltage applied to the converter. the latter are oscillating, together moving.

1. knives 4 22. Knives, interacting with the stationary no. 2, cut off,; hair, in the proposed electric shaver use the reverse piezoelectric 0 i effect (electrostriction).

SUBJECT OF INVENTION J

, | 1. An electric razor comprising a housing | And a fixed 1 upper knife mounted therein and connected to the drive and I installed with the possibility of reciprocating movement of at least one lower knife, so that in order to reduce. vibrations and noise during operation, the drive contains electrically interconnected bilayer piezoelectric oscillating transducers made of ferroelectric ceramic material, for example titanate or zircono - barium titanate, mounted in the block associated with the lower knife. 2. The electric shaver pop. 1 is different in that the block includes two tires, one of which is rigidly mounted in the housing, and the second is connected to the lower knife by means of the transmission link. 3. Electric shavers according to claim 1, that is to say that the converters are mounted so that their surfaces. Have one turned to another. 4. The electric shaver according to claim 1, that is, that the converters are installed one near the other so that their ends face one another. 5. The electric shaver according to claim 1, wherein the unit comprises a frame in which converters are mounted, interconnected in the middle part of the frame by an intermediate link connected to the lower knife. 6. The electric shaver according to claim 5, of which is that the frame is installed so that its plane is parallel to the swing axis of the lower knife. 7. The electric shaver of claim 1, wherein the unit contains groups of transducers, each of which is connected to its corresponding lower knife, while the knives are installed with the possibility of counter-reciprocating, translational movement. 8. The electric shaver according to claim 1, wherein the unit contains groups of transducers connected by an intermediate link carrying a transmission element for communicating with the lower toe. 9. The electric shaver according to claim 1, wherein the unit is connected to the lower blades by means of spring-loaded rods pivotally mounted in the housing. 10. The electric shaver according to claim 2, characterized in that the transmission link includes a rod pivotally mounted in the housing and connected to a spring, one end fixed in the wall of the housing.

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