US3242357A - Oscillating armature motor - Google Patents

Oscillating armature motor Download PDF

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Publication number
US3242357A
US3242357A US271159A US27115963A US3242357A US 3242357 A US3242357 A US 3242357A US 271159 A US271159 A US 271159A US 27115963 A US27115963 A US 27115963A US 3242357 A US3242357 A US 3242357A
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United States
Prior art keywords
leaf spring
armature
motor
oscillating
slide
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Expired - Lifetime
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US271159A
Inventor
Guichard Roland
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US Philips Corp
North American Philips Co Inc
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US Philips Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/28—Drive layout for hair clippers or dry shavers, e.g. providing for electromotive drive
    • B26B19/282—Motors without a rotating central drive shaft, e.g. linear motors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/02—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
    • H02K33/04—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs wherein the frequency of operation is determined by the frequency of uninterrupted AC energisation

Definitions

  • the invention relates to a motor comprising an oscillating armature for driving tools, particularly for driving the cutting members of hair clippers and/ or shaving apparatus.
  • the cutting members are moved in an oscillatory manner behind one or more combs or shear plates.
  • the invention is characterized in that the driving connection between the armature and the tool is solely formed by an elastic element.
  • the elastic part which guides or controls the moving parts (for instance the cutting members and the oscillatin-g armature) is connected with the housing of the apparatus in ⁇ a rigid manner, so that the oscillations of the armature are transferred to the
  • the moving parts of the motor and the cutting members perform such oscillatory motions that their masses and the oscillations thus produced reinforce each other.
  • the invention has particularly for its object to provide such a structure of these apparatus that they can better fulfill the requirements of practice, while the aforesaid disadvantages are avoided.
  • the elastic element may be formed by a leaf spring, one end of which is rigidly secured to the armature, while between its ends the leaf spring is supported between two opposite points of support so that it is displaceable in its longitudinal direction.
  • the dimensions of said leaf spring are preferably chosen so that it oscillates in its resonance frequency.
  • the end of the elastic element, which drives the tool may also be provided with one or more fingers, which are adapted to tilt and to slide in one or more slots provided in the tool.
  • FIG. l is a longitudinal sectional view of an apparatus comprising a motor according to the invention.
  • FIG. 2 is a longitudinal sectional view of a further apparatus according to the invention.
  • the apparatus shown in FIG. l is a dry shaving apparatus, the shear plate 13 of which, behind which the cutting member 8 is adapted to move, constitutes one end of a largely cylindrical or prismatic housing.
  • the cutting member 8 has two projections 8a, which form together a slot, in which a finger 9 is adapted to tilt and to slide.
  • This finger 9 is secured to an elastic or resilient element 6 by casting or by other means; this elastic element has the form of a leaf spring, shown on its narrow side, which spring constitutes the sole connection with the oscillating armature 4 of the motor 1.
  • This armature of magnetic material opens and closes during its oscillations the magnetic circuit formed by it together with the stationary part 2, the stator of the motor 1.
  • This stator is formed by a U-shaped electromagnet, which is excited by alternating current passing through the coils 3, so that per period of the said alternating current the armature 4 fulfills a complete oscillation about its axis 5.
  • the leaf spring 6 is set oscillating.
  • the leaf spring 6 is held so as to be slidable in its longitudinal direction; these rollers are held by two supports 11, which are rigidly secured to the housing 12, so that an oscillation node is produced.
  • the magnitude of the amplitude of the armature and that of the amplitude of the cutting members can be adjusted relatively to each other to the most favourable values by a suitable choice of the mass of each of these elements. In order to obtain the .best results, the resultant frequency mustbe equal or substantially equal to the frequency of the magnetic forces due to the alternating current passing through the coils 3.
  • the rigidity ofthe leaf spring 6 is determined by its size and shape, while the place of the node is determined by the two rollers 10 and the magnitude of the moving masses.
  • the leaf spring 6 preforms transversal oscillations (see the broken lines) on either side of the axis 5 associated with its rest position, the antinodes occurring between said axis 5 and the rollers 10 and at the end, where the finger 9 is fastened.
  • the said leaf spring 6 In order to permit distance variations between the axis 5 and the finger 9 due to the bending of the leaf spring in the proximity Iof the antinodes, the said leaf spring 6 must be capable of sliding between the rollers 10, since it is rigidly secured to the armature 4. To this end the leaf spring is laterally supported so as to be slightly resilient by means of the two rollers 10 of elastic material. The elasticity of these two rollers is chosen so that the leaf spring 6 can be bent and can slide slightly in its longitudinal direction.
  • FIG. 2 shows a different embodiment of an apparatus according to the invention, in which the cutting faces forming the shear plates form part of the sides of the housing, which has an elongated shape.
  • FIGURE 2 corresponding parts are designated by the same reference numerals as in FIG. 1.
  • the moving part 16, secured to the leaf spring 6 similarly to the finger 9, has at its end two identical fingers, which are capable of tilting and sliding in slots provided to this end in the cutting members 8 and 14.
  • the additional cutting member 14, which is associated with the shear plate 15 and also serves for shaving, could also be used for hair clipping.
  • the cutting members V8 and 14 are driven by the moving part 16 in the longitudinal directions of their respective shear plates by the oscillatory movement of the leaf spring 6, produced by the motor 1.
  • the moving masses can be completely balanced, since the assembly of the cutting members 8 and 14 and the moving part 16 constitute a mass which rotates about a point between the rollers 10 in a direc tion opposite the rotation of the mass of the armature 4 about the axis 5. If the masses are correctly chosen, the apparatus will operate without the oscillations being transferred to the users hand.
  • the use of the motor with the oscillating armature according to the invention is not restricted to the aforesaid apparatus.
  • Such a motor may also be used for example in small pumps and in oscillating brushes.
  • a motor for an apparatus comprising an oscillating armature, a resilient element solely connecting said oscillating aramture with said apparatus, said resilient ele- ICC ment constituting a leaf spring having one end thereof rigidly secured to said armature, and means slidably supporting said leaf spring between its ends at two opposite points whereby said leaf spring can slide therein in a direction along its longitudinal axis.
  • a moror for an electric shaver said shaver being provided with a slot, comprising an oscillating armature, a resilient ⁇ element solely connecting said socillating armature with said electric shaver, at least one nger on one end of said resilient element adapted to t in said slot and tilt and slide therein, said resilient element constituting a leaf spring having one end thereof rigidly secured to said armature, and means slidably supporting said leaf spring between its ends at two opposite points whereby said leaf spring can slide therein in a direction along its longitudinal axis.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
  • Sawing (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Description

March 22, 1966 R. GUICHARD OSCILLA'TING ARMATURE MOTOR Filed April 8., 1965 a//l/l v INVENTOR. ROLAND GUICHARD AGENT hand of the user of the apparatus.
United States Patent O 2 claims. (el. 31o- 37) The invention relates to a motor comprising an oscillating armature for driving tools, particularly for driving the cutting members of hair clippers and/ or shaving apparatus.
In such apparatus the cutting members are moved in an oscillatory manner behind one or more combs or shear plates.
The invention is characterized in that the driving connection between the armature and the tool is solely formed by an elastic element.
In a known apparatus the elastic part, which guides or controls the moving parts (for instance the cutting members and the oscillatin-g armature) is connected with the housing of the apparatus in `a rigid manner, so that the oscillations of the armature are transferred to the With such constructions the moving parts of the motor and the cutting members perform such oscillatory motions that their masses and the oscillations thus produced reinforce each other.
The invention has particularly for its object to provide such a structure of these apparatus that they can better fulfill the requirements of practice, while the aforesaid disadvantages are avoided.
The elastic element may be formed by a leaf spring, one end of which is rigidly secured to the armature, while between its ends the leaf spring is supported between two opposite points of support so that it is displaceable in its longitudinal direction. The dimensions of said leaf spring are preferably chosen so that it oscillates in its resonance frequency.
The end of the elastic element, which drives the tool, may also be provided with one or more fingers, which are adapted to tilt and to slide in one or more slots provided in the tool.
The invention will be described more fully with reference to the accompanying drawing, which shows one embodiment of the invention.
FIG. l is a longitudinal sectional view of an apparatus comprising a motor according to the invention.
FIG. 2 is a longitudinal sectional view of a further apparatus according to the invention.
The apparatus shown in FIG. l is a dry shaving apparatus, the shear plate 13 of which, behind which the cutting member 8 is adapted to move, constitutes one end of a largely cylindrical or prismatic housing.
The cutting member 8 has two projections 8a, which form together a slot, in which a finger 9 is adapted to tilt and to slide. This finger 9 is secured to an elastic or resilient element 6 by casting or by other means; this elastic element has the form of a leaf spring, shown on its narrow side, which spring constitutes the sole connection with the oscillating armature 4 of the motor 1.
This armature of magnetic material opens and closes during its oscillations the magnetic circuit formed by it together with the stationary part 2, the stator of the motor 1. This stator is formed by a U-shaped electromagnet, which is excited by alternating current passing through the coils 3, so that per period of the said alternating current the armature 4 fulfills a complete oscillation about its axis 5. Thus the leaf spring 6 is set oscillating. On either side of two opposite rollers 10 3,242,357 Patented Mar. 22, 1966 the leaf spring 6 is held so as to be slidable in its longitudinal direction; these rollers are held by two supports 11, which are rigidly secured to the housing 12, so that an oscillation node is produced. The leaf spring 6, with the mass of the armature 4 at one end and that of the finger 9 and the cutting member 8 at the other end, constitutes an oscillatory system with its own frequency, which depends upon the rigidity of the leaf spring 6 and the magnitude of the moving masses, since this oscillation frequency is determined by the frequency of the leaf spring, connected with the armature, and the oscillation frequency of the leaf spring, connected with the cutting members. The magnitude of the amplitude of the armature and that of the amplitude of the cutting members can be adjusted relatively to each other to the most favourable values by a suitable choice of the mass of each of these elements. In order to obtain the .best results, the resultant frequency mustbe equal or substantially equal to the frequency of the magnetic forces due to the alternating current passing through the coils 3. The rigidity ofthe leaf spring 6 is determined by its size and shape, while the place of the node is determined by the two rollers 10 and the magnitude of the moving masses.
From FIGURE 1 it will be seen that the leaf spring 6 preforms transversal oscillations (see the broken lines) on either side of the axis 5 associated with its rest position, the antinodes occurring between said axis 5 and the rollers 10 and at the end, where the finger 9 is fastened. In order to permit distance variations between the axis 5 and the finger 9 due to the bending of the leaf spring in the proximity Iof the antinodes, the said leaf spring 6 must be capable of sliding between the rollers 10, since it is rigidly secured to the armature 4. To this end the leaf spring is laterally supported so as to be slightly resilient by means of the two rollers 10 of elastic material. The elasticity of these two rollers is chosen so that the leaf spring 6 can be bent and can slide slightly in its longitudinal direction.
FIG. 2 shows a different embodiment of an apparatus according to the invention, in which the cutting faces forming the shear plates form part of the sides of the housing, which has an elongated shape.
1n FIGURE 2 corresponding parts are designated by the same reference numerals as in FIG. 1.
The moving part 16, secured to the leaf spring 6 similarly to the finger 9, has at its end two identical fingers, which are capable of tilting and sliding in slots provided to this end in the cutting members 8 and 14.
The additional cutting member 14, which is associated with the shear plate 15 and also serves for shaving, could also be used for hair clipping.
It will be obvious that the cutting members V8 and 14 are driven by the moving part 16 in the longitudinal directions of their respective shear plates by the oscillatory movement of the leaf spring 6, produced by the motor 1. In this embodiment the moving masses can be completely balanced, since the assembly of the cutting members 8 and 14 and the moving part 16 constitute a mass which rotates about a point between the rollers 10 in a direc tion opposite the rotation of the mass of the armature 4 about the axis 5. If the masses are correctly chosen, the apparatus will operate without the oscillations being transferred to the users hand.
The use of the motor with the oscillating armature according to the invention is not restricted to the aforesaid apparatus. Such a motor may also be used for example in small pumps and in oscillating brushes.
What is claimed is:
1. A motor for an apparatus comprising an oscillating armature, a resilient element solely connecting said oscillating aramture with said apparatus, said resilient ele- ICC ment constituting a leaf spring having one end thereof rigidly secured to said armature, and means slidably supporting said leaf spring between its ends at two opposite points whereby said leaf spring can slide therein in a direction along its longitudinal axis.
2. A moror for an electric shaver, said shaver being provided with a slot, comprising an oscillating armature, a resilient `element solely connecting said socillating armature with said electric shaver, at least one nger on one end of said resilient element adapted to t in said slot and tilt and slide therein, said resilient element constituting a leaf spring having one end thereof rigidly secured to said armature, and means slidably supporting said leaf spring between its ends at two opposite points whereby said leaf spring can slide therein in a direction along its longitudinal axis.
References Cited by the Examiner UNITED STATES PATENTS 2,013,229 9/1935 Audis 310--29 X 2,967,253 1/1961 Wahl 3l0-29 3,105,163 9/1963 Camp S10-29 0 oRrs L. RADER, Primary Examiner.
MILTON O. HIRSHFIELD, Examiner.
CYRIL W. DAWSON, Assistant Examiner.

Claims (1)

  1. 2. A MOTOR FOR AN ELECTRIC SHAVER, SAID SHAVER BEING PROVIDED WITH A SLOT, COMPRISING AN OSCILLATING ARMATURE, A RESILIENT ELEMENT SOLELY CONNECTING SAID OSCILLATING ARMATURE WITH SAID ELECTRIC SHAVER, AT LEAST ONE FINGER ON ONE END OF SAID RESILIENT ELEMENT ADAPTED TO FIT IN SAID SLOT AND TILT AND SLIDE THEREIN, SAID RESILIENT ELEMENT CONSTITUTING A LEAF SPRING HAVING ONE END THEREOF RIGIDLY SECURED TO SAID ARMATURE, AND MEANS SLIDABLY SUPPORTING SAID LEAF SPRING BETWEEN ITS ENDS AT TWO OPPOSITE POINTS WHEREBY SAID LEAF SPRING CAN SLIDE THEREIN IN A DIRECTION ALONG ITS LONGITUDINAL AXIS.
US271159A 1962-04-11 1963-04-08 Oscillating armature motor Expired - Lifetime US3242357A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR894046A FR1327851A (en) 1962-04-11 1962-04-11 Vibrating motor of low power and amplitude, usable in particular to actuate hair and hair cutters, and devices incorporating such motors

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US3242357A true US3242357A (en) 1966-03-22

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US (1) US3242357A (en)
AT (1) AT240213B (en)
CH (1) CH421263A (en)
DE (1) DE1463999B2 (en)
DK (1) DK104158C (en)
ES (1) ES286897A1 (en)
FR (1) FR1327851A (en)
GB (1) GB1015578A (en)
NL (1) NL291152A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4594778A (en) * 1984-03-21 1986-06-17 U.S. Philips Corporation Shaving unit
US6249064B1 (en) * 1998-06-05 2001-06-19 Seagate Technology Llc Magneto-striction microactuator
WO2012124459A1 (en) * 2011-03-17 2012-09-20 パナソニック 株式会社 Electric razor
JP2012192094A (en) * 2011-03-17 2012-10-11 Panasonic Corp Electric razor
US9117600B2 (en) * 2012-09-11 2015-08-25 Omron Corporation Electric magnet device and switch provided therewith

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107598985B (en) * 2017-09-08 2019-06-21 广州医谷生物医疗科技有限公司 A kind of paediatrics skin-treatment device
CN107598986B (en) * 2017-09-08 2019-07-23 合肥龙图腾信息技术有限公司 A kind of hair method for cleaning suitable for children

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2013229A (en) * 1931-10-08 1935-09-03 Andis Mathew Power driven hair clipper
US2967253A (en) * 1958-05-12 1961-01-03 Wahl Clipper Corp Electromagnetic vibratory unit
US3105163A (en) * 1961-03-31 1963-09-24 Schick Inc Electric shaver reciprocating motor-drive unit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2013229A (en) * 1931-10-08 1935-09-03 Andis Mathew Power driven hair clipper
US2967253A (en) * 1958-05-12 1961-01-03 Wahl Clipper Corp Electromagnetic vibratory unit
US3105163A (en) * 1961-03-31 1963-09-24 Schick Inc Electric shaver reciprocating motor-drive unit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4594778A (en) * 1984-03-21 1986-06-17 U.S. Philips Corporation Shaving unit
US6249064B1 (en) * 1998-06-05 2001-06-19 Seagate Technology Llc Magneto-striction microactuator
WO2012124459A1 (en) * 2011-03-17 2012-09-20 パナソニック 株式会社 Electric razor
JP2012192094A (en) * 2011-03-17 2012-10-11 Panasonic Corp Electric razor
US9117600B2 (en) * 2012-09-11 2015-08-25 Omron Corporation Electric magnet device and switch provided therewith

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ES286897A1 (en) 1963-07-01
DK104158C (en) 1966-04-12
AT240213B (en) 1965-05-25
GB1015578A (en) 1966-01-05
CH421263A (en) 1966-09-30
FR1327851A (en) 1963-05-24
DE1463999A1 (en) 1969-04-10
NL291152A (en)
DE1463999B2 (en) 1970-11-19

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