H - Electricity – 02 – K
Patent
H - Electricity
02
K
74/18
H02K 7/118 (2006.01) A61H 23/02 (2006.01) B06B 1/10 (2006.01) B26B 19/28 (2006.01) H02K 7/06 (2006.01)
Patent
CA 1266789
ABSTRACT: "Drive mechanism for a domestic vibration apparatus". The invention relates to a drive mechanism for a domestic vibration-type apparatus, such as a dry-shaver or a massage device, in which the rotor shaft (19) of a single-phase synchronous motor drives a cam-and-follower mechanism which converts the rotary motion of the rotor into a vibratory motion, the rotor of the motor having a main field direction (22) and the stator having a main field direction (16). The longitudinal axis of the mirror- symmetrical cam extends at an angle to the main field direction (22) of the rotor. Rollers (31, 31a) which follow the cam (21) are arranged on a driver end (27, 27a) of a pivotal arm which is pivotable about its central portion and a vibratory part (39) to be driven is arranged on the driving end (35) of this pivotal arm. As they cooperate with the cam (21) the rollers (31, 31a) are con- stantly in contact with the cam profile. At the end of the transmission path, which exhibits backlash, the vibratory part (39) cooperates with a spring (38) which urges one of the rollers (31, 31a) against the cam (21), causing the position of the cam (21) relative to the direction of magnetization (22) of the rotor to be changed in such a way that the rotor is forced out of a position in which the direction of magnetization of the rotor (22) and the main field direction of the rotor (16) extend parallel to each other, by means of the spring (38), suitably in the positive direction. Further, in this parallel position the vibratory part (39) is situated in the proximity of its reversal point. In order to obtain a further noise reduction these is provided a unidirectional blocking device. Fig. 1.
515147
Bertram Leo
Bukoschek Romuald L.
Schemmann Hugo
Bertram Leo
Bukoschek Romuald L.
Fetherstonhaugh & Co.
N.v. Philips Gloeilampenfabrieken
Schemmann Hugo
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