摘要:
An electronic timepiece movement including a timepiece motor formed by an assembly comprising a frame made of non-magnetic material and a rotor housed in said frame; and method of manufacturing a motor of this type wherein the frame is first made with a lateral aperture, said frame including a first part and a second part each carrying a bearing, the first part or the first and second parts of the frame being elastically deformable. Next, the rotor is mounted in the frame through the lateral aperture therein by increasing the distance between the two bearings of the frame via the elastic deformation of the first part or of the first and second parts of said frame, said elastic deformation being provided in particular for the insertion of the two rotor pivots into the two respective bearings of the pre-formed frame.
摘要:
A display module has a two-phase motor which includes a rotor including N pairs of poles magnetised radially, in alternate directions, N being equal to 3 or 5, and a stator part including at least two W-shaped circuits made from radial pole teeth extending inwards from a peripheral closed belt and including a coil on a central leg of the W, said W-shaped circuits being arranged in such a way that when the central tooth of one of the W-shaped circuits is positioned facing a rotor magnetic transition, at least one central tooth of another W-shaped circuit is positioned facing a rotor magnetic pole. Said display module additional includes at least one specific mechanical interaction (between the rotor and the stator, comprising angular friction at a force that is substantially constant depending on the speed of the rotor relative to the stator, and at a value lower than the torque produced by the electromagnetic interaction between the rotor and the stator.
摘要:
A blade drive device includes: a blade; a drive source that drives the blade; and a chassis that has an opening opened and closed by the blade and that houses the blade and the drive source. The drive source includes: a rotor that is rotatably supported; a stator around which a coil for excitation is wound and which applies a rotational force to the rotor. The stator is arranged to surround a periphery of the opening and has a rectangular shape.
摘要:
A blade drive device includes: a blade; a drive source that drives the blade; and a chassis that has an opening opened and closed by a driving of the blade, and that houses the blade and the drive source. The drive source includes: a rotor that is rotatably supported; and a stator around which a coil for excitation is wound and which applies a rotational force to the rotor. The stator is formed along an inner side surface of the chassis and has a rectangular shape.
摘要:
A step motor includes a rotor having four magnetic poles, a first magnetic pole magnetically excited by a first coil, a second magnetic pole magnetically excited by a second coil, and a third magnetic pole magnetically excited by the first coil and the second coil. A gap between the third magnetic pole and the rotor is smaller than that between the first magnetic pole and the rotor and that between the second magnetic pole and the rotor. In the step motor, it is possible to intensify the influence, on the rotor having four poles, of the magnetic fields created from three magnetic poles. Accordingly, this can weaken the magnetic fields set up from the first magnetic pole and the second magnetic pole, which tend to intensify the influence on the rotor, enabling the torque smaller at the time of the rotation start of the rotor.
摘要:
A stator (1) is made up by bonding a first stator part (1a) made of a high-permeability material to a second stator part (1b) made of a high-permeability material respectively by welding through the intermediary of connections (1c,1d) made of a low-permeability material or a nonmagnetic material, interposed therebetween. Paired recesses (5a, 5b) serving as holding torque setting means for holding a rotor (3) by a magnetic action are formed on the inner, periphery of a rotor hole (2) defined inside the stator (1) at the position forming an initial phase angle (&thgr;1). A field coil (7) for excitation is magnetically bonded to opposite ends of the stator (1), thereby forming a two-pole step motor for a timepiece
摘要:
An indicating instrument includes a dial plate, a casing disposed behind the dial plate, a drive control section disposed in the casing and a rotary shaft driven by the drive control section. The rotary shaft is comprised of a pair of thin shafts respectively supported by a pair of bearings and a thick shaft connecting the pair of thin shafts. Each thin shaft has such a length and an outside diameter that the ratio of the length to the outside diameter provides a sufficient bending strength. Therefore, the rotary shaft rotates smoothly and a pointer carried by the shaft indicates accurate values of a vehicle operating condition.
摘要:
The present invention concerns an electromagnetic motor of the type including a stator (4), a rotor (6) mounted for rotation relative to the stator, and a cage (2a, 2b, 2c, 2d, 2e) fixedly engaged relative to the stator, such cage including a bottom (18), a cover (22) and a body (20), the rotor being mounted for rotation in the interior of the cage, such motor being characterized in that the cage (2a, 2b, 2c, 2d, 2e) is formed from a synthetic material, while mechanical anchoring and positioning means are provided between the wall (P) of the cage body (20) and the stator (4) which leave the wall (P) free. This motor is intended for fitting out a timepiece in particular.
摘要:
Briefly stated, the invention comprises an improved stepping motor and method of making it including locating it in the timepiece frame, the stepping motor including a rotor and a stator. A flat magnetizable stator member defines a central opening with diametrically opposed narrow sections on either side of the opening, a non-magnetic bushing disposed in the opening and secured to the surface of the stator member. The bushing has diametrically opposed cut-out portions aligned with the narrow sections. The narrow sections are severed to separate the stator into two pole shoes which are retained in position by the bushing. The severing is preferably by laser, but may includes sawing or other severing methods. The pole shoes of the stator member are then attached to the timepiece frame plate. The stepping motor rotor is journalled in bores formed in the frame and bushing.
摘要:
A stepping motor with a rotor having magnetic poles arranged at a constant pitch along the periphery, first and second stator sets each having stator poles at a constant pitch and arranged at a mutual offset of 1/4 pitch with respect to the rotor, and coils for magnetizing the first and second stator sets, wherein each stator pole is provided with a magnetic polarity and is practically divided, at least on a face directed to the rotor, into plural areas, so as to form an area of a high magnetic reluctance at the center.