Claims
- 1. An electrically driven vibrating apparatus such as a dry shaver, comprising a single-phase synchronous motor having a drive shaft; a part to be reciprocated; a cam rotated by the motor drive shaft; a lever journalled about a pivot and having one end in contact with the part to be reciprocated wherein the lever comprises a first lever arm and a second lever arm, said two lever arms being at one end pivoted about a common pivot, the second lever arm making an angle .gamma. of approximately 140.degree. with the first lever arm; a pressure roller mounted on the lever and being in constant contact with the cam profile, the pressure roller being mounted at the other end of the first lever arm, the other end of the second lever arm being in contact with the part to be reciprocated; and a compression spring acting on the lever for constantly urging the pressure roller towards the cam, the compression spring acting on the first lever arm.
- 2. An electrically driven vibrating appratus such as a dry shaver comprising a single-phase synchronous motor having a drive shaft; a part to be reciprocated; a cam rotated by the motor drive shaft; a lever comprising a first lever arm and a second lever arm journalled about a pivot and having one end in contact with the part to be reciprocated, said two lever arms being at one end pivoted about a common pivot, the second lever arm making an angle .epsilon. with the first lever arm; a pressure roller mounted at the other end of the first lever arm and being in constant contact with the cam profile, the other end of the second lever arm being in contact with the part to be reciprocated; and a compression spring acting on the first lever arm for constantly urging the pressure roller toward the cam, wherein in the center position of the lever, the line of action of the compression spring extends through the drive shaft of motor; said angle .epsilon. being defined between a connecting line connecting the axis of the pressure roller and the pivot and the central axis of the second lever arm and being approximately 140.degree. whereby the break point coincides with the center of the pivot.
- 3. An electrically driven vibrating apparatus such as a dry shaver comprising a single-phase synchronous motor having a rotor with an axis of magnetization and a drive shaft; a part to be reciprocated; a cam having a major axis rotated by the motor drive shaft; a lever comprising a first lever arm and a second lever arm journalled about a pivot and having one end in contact with the part to be reciprocated, said two lever arms being at one end pivoted about a common pivot, the second lever arm making an angle .epsilon. with the first lever arm; a pressure roller mounted at the other end of the first lever arm and being in constant contact with the cam profile, the other end of the second lever arm being in contact with the part to be reciprocated; and a compression spring acting on the first lever arm for constantly urging the pressure roller toward the cam, wherein, for a doubled frequency of the synchronous motor, an angle .beta. defined between the axis of magnetization of the motor rotor and the major axis of the cam is in the range of from 40.degree. to 55.degree..
- 4. An electrically driven vibrating apparatus such as a dry shaver comprising a single-phase synchronous motor having a drive shaft; a part to be reciprocated; a cam rotated by the motor drive shaft; a lever comprising a first lever arm and a second lever arm journalled about a pivot and having one end in contact with the part to be reciprocated, said two lever arms being at one end pivoted about a common pivot, the second lever arm making an angle .epsilon. of approximately 140.degree. with the first lever arm; a pressure roller mounted at the other end of the first lever arm and being in constant contact with the cam profile, the other end of the second lever arm being in contact with the part to be reciprocated; and a compression spring acting on the first lever arm for constantly urging the pressure roller toward the cam, the central axis of the second lever arm being perpendicular to the main motor stator field direction when the stator field exerts no torque on the motor rotor.
- 5. An electrically driven vibrating apparatus such as a dry shaver comprising a single-phase synchronous motor having a stator, a rotor and a drive shaft, an angle .theta. representing the rotor position and .theta.=0.degree. representing the main motor stator field direction; a part to be reciprocated; a cam having a major axis rotated by the motor drive shaft, an angle .alpha. representing the cam position and .alpha.-0.degree. representing the direction of movement of the major axis of the cam as it extends in the same direction as the line of action of a compression spring acting on the cam; a lever comprising a first lever arm and a second lever arm journalled about a pivot and having one end in contact with the part to be reciprocated, said two lever arms being at one end pivoted about a common pivot, the second lever arm making an angle .epsilon. with the first lever arm; a pressure roller mounted at the other end of the first lever arm and being in constant contact with the cam profile, the other end of the second lever arm being in contact with the part to be reciprocated; said compression spring acting on the first lever arm for constantly urging the pressure roller toward the cam, the angle between the .theta.=0 direction and the .alpha.=0.degree. direction being approximately -5.degree..
- 6. An electrically driven vibrating apparatus such as a dry shaver, comprising a single-phase synchronous motor having a rotor having an axis of magnetization and a drive shaft; a part to be reciprocated; a cam having a major axis rotated by the motor drive shaft; a lever journalled about a pivot and having one end in contact with the part to be reciprocated; a pressure roller mounted on the lever and being in constant contact with the cam profile; and a compression spring acting on the lever for constantly urging the pressure roller towards the cam, an angle .beta. between the axis of magnetization of the motor rotor and the major axis of the cam being approximately in the range between -50.degree. to -35.degree..
- 7. An electrically driven vibrating apparatus such as a dry shaver, comprising a single-phase synchronous motor having a stator, a rotor and a drive shaft, an angle .theta. representing the rotor position and .theta.=0.degree. representing the main motor stator field direction; a part to be reciprocated; a cam having a major axis rotated by the motor drive shaft, an angle .alpha. representing the cam position and .alpha.=0.degree. representing the direction of movement of the major axis of the cam as it extends in the same direction as the line of action of a compression spring acting on the cam; a lever journalled about a pivot and having one end in contact with the part to be reciprocated; a pressure roller mounted on the lever and being in constant contact with the cam profile; said compression spring acting on the lever for constantly urging the pressure roller towards the cam, the angle between the .theta.=0 direction and the .alpha.=0.degree. direction being approximately 50.degree..
- 8. An electrically driven vibrating apparatus such as a dry shaver, comprising a single-phase synchronous motor having a drive shaft; a part to be reciprocated; a cam rotated by the motor drive shaft; a lever journalled about a pivot and having one end in contact with the part to be reciprocated wherein the lever comprises a first lever arm and a second lever arm, said two lever arms being at one end pivoted about a common pivot, the second lever arm making an angle .gamma. of approximately 140.degree. with the first lever arm; a pressure roller mounted on the lever and being in constant contact with the cam profile, the pressure roller being mounted at the other end of the first lever arm, the other end of the second lever arm being in contact with the part to be reciprocated; and a compression spring acting on the lever for constantly urging the pressure roller towards the cam, the compression spring acting on the first lever arm and on the pressure roller perpendicularly to the connecting line between the axis of said pressure roller and said pivot.
- 9. An electrically driven vibrating apparatus such as a dry shaver, comprising a single-phase synchronous motor having a stator, a rotor and a drive shaft, the position of the rotor being represented by the angle .theta. and .theta.=0.degree. representing the main motor stator field direction; a part to be reciprocated moving perpendicularly to the main stator field direction; a cam rotated by the motor drive shaft; a lever journalled about a pivot and having one end in contact with the part to be reciprocated wherein the lever comprises a first lever arm and a second lever arm, said two lever arms being at one end pivoted about a common pivot, the second lever arm making an angle .epsilon. of approximately 140.degree. with the first lever arm; a pressure roller mounted on the lever and being in constant contact with the cam profile, the pressure roller being mounted at the other end of the first lever arm, the other end of the second lever arm being in contact with the part to be reciprocated; and a compression spring acting on the lever for constantly urging the pressure roller towards the cam, the compression spring acting on the first lever arm.
- 10. An electrically driven vibrating apparatus such as a dry shaver, comprising a single-phase synchronous motor having a rotor and a drive shaft, the position of the rotor being represented by the angle .theta. and .theta.=0.degree. representing the main motor stator field direction; a part to be reciprocated; a cam rotated by the motor drive shaft; a lever journalled about a pivot and having one end in contact with the part to be reciprocated wherein the lever comprises a first lever arm and a second lever arm, said two lever arms being at one end pivoted about a common pivot, the second lever arm making an angle .epsilon. of approximately 140.degree. with the first lever arm; a pressure roller mounted on the lever and being in constant contact with the cam profile, the pressure roller being mounted at the other end of the first lever arm, the other end of the second lever arm being in contact with the part to be reciprocated; and a compression spring acting on the lever for constantly urging the pressure roller towards the cam, the compression spring acting on the first lever arm and perpendicularly to the .theta.=0.degree. direction.
- 11. An electrically driven vibrating apparatus such as a dry shaver, comprising a single-phase synchronous motor having a rotor and a drive shaft, the position of the rotor being represented by an angle .theta. and .theta.=0.degree. representing the main motor stator field direction; a part to be reciprocated which moves with respect to the main motor stator field direction at an angle in the range between 0.degree. and 90.degree.; a cam rotated by the motor drive shaft; a lever journalled about a pivot and having one end in contact with the part to be reciprocated. wherein the lever comprises a first lever arm and a second lever arm, said two lever arms being at one end pivoted about a common pivot, the second lever arm making an angle .epsilon. of approximately 140.degree. with the first lever arm; a pressure roller mounted on the lever and being in constant contact with the cam profile, the pressure roller being mounted at the other end of the first lever arm, the other end of the second lever arm being in contact with the part to be reciprocated; and a compression spring acting on the lever for constantly urging the pressure roller towards the cam, the compression spring acting on the first lever arm.
Priority Claims (1)
Number |
Date |
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Kind |
3404297 |
Feb 1984 |
DEX |
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Parent Case Info
This application is a continuation, of application Ser. No. 698,056, filed Feb. 4, 1985, now abandoned.
US Referenced Citations (9)
Foreign Referenced Citations (2)
Number |
Date |
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153176 |
May 1904 |
DE2 |
267291 |
Nov 1927 |
GBX |
Continuations (1)
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Number |
Date |
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Parent |
698056 |
Feb 1985 |
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