JPH028545Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" This invention relates to a clock motor driven by a polarized signal and used in a slave clock.

"Conventional technology" FIG. 4 shows the structure of a conventional slave clock motor.

In the figure, 1 indicates a rotor, and 2 indicates an excitation device that applies an excitation magnetic field to the rotor 1 to rotate it.

The rotor 1 uses a disk-shaped permanent magnet. The disc-shaped rotor 1 is magnetized with, for example, six magnetic poles.

The excitation device 2 includes a U-shaped iron core 3 and a coil 4 wound around the iron core 3. The iron core 3 has magnetic pole portions 3B and 3C protruding in parallel from both ends of a magnetic core portion 3A around which a coil 4 is wound, and the entire iron core 3 is substantially U-shaped. Magnetic poles M are formed protruding from both sides of the tips of the magnetic pole parts 3B and 3C in mutually opposing directions, and protrude from the side ends of the magnetic pole M in parallel with and in opposite directions to the rotor 4. Auxiliary poles 3BB and 3CC are formed to determine the direction of rotation.

"Problem that the invention aims to solve" In conventional watch motors, auxiliary poles 3BB and 3CC
Since the coils 4 and 4 protrude inward from each other, when winding the coil 4, it is impossible to linearly wind the coil 4 with a bobbin attached to the iron core 3.

For this purpose, conventionally, the iron core 3 is separated at the magnetic core part 3A as shown in FIG. It has a structure that connects to

When adopting such a structure, the iron core 3 is a magnetic core part 3A.
There is a slight gap at the joint between the two, and this gap increases magnetic resistance, making it impossible to generate a large magnetic field. In other words, there is a drawback that a magnetic field cannot be efficiently generated.

For this reason, the auxiliary poles 3BB and 3CC must be placed close to the rotor 1 because the magnetic field generation efficiency is poor. For this purpose, the auxiliary pole 3
Since BB and 3CC largely protrude inward, there is an inconvenience that the coil 4 cannot be directly wound on the bobbin attached to the iron core 3.

The purpose of this invention is to provide a watch motor having a structure in which a bobbin is attached to an iron core and a coil can be directly wound around the bobbin.

"Means for solving the problem" In this invention, A: a pair of mutually parallel magnetic pole parts, a magnetic core part connecting one end of the magnetic pole parts, and a magnetic pole protruding inside the tip of the magnetic pole part. , an iron core consisting of an auxiliary pole protruding from the side end of the magnetic pole in parallel with the magnetic pole part in mutually opposite directions; B an insulating bobbin equipped with a slit that fits into the magnetic core part of this iron core; C this insulating bobbin. A collar with a notch protruding from both ends and connected to the slit; D A coil wound around a bobbin with both ends regulated by the collar; A watch motor is constructed by the attached rotor and the following.

"Function" According to the structure of this invention, the iron core is composed of mutually parallel magnetic pole parts and a magnetic core part that connects the ends of the magnetic pole parts, and is integrally molded in a U-shape.

An insulating bobbin having a slit that fits into the magnetic core is fitted into the magnetic core of the U-shaped iron core. This insulating bobbin has a flange provided at both ends with a cutout communicating the slit, and a coil is wound around the flange.

In particular, since the auxiliary poles are formed parallel to the magnetic pole portion and in opposite directions from the side ends of the magnetic poles, the structure is such that the auxiliary poles do not protrude inwardly with respect to the width of the bobbin.

As a result, even though the iron core is integrally molded in a U-shape, a bobbin can be attached to the magnetic core portion of the iron core, and a coil can be wound around this bobbin.

Since the thus obtained excitation device has an integrated iron core, the efficiency of generating a magnetic field is high. Therefore, the rotor can be rotated sufficiently even if the auxiliary pole does not protrude in the direction along the rotor.

Therefore, according to this invention, a bobbin can be attached and integrated with the iron core, and a coil can be directly wound around the bobbin, thereby simplifying the manufacturing process. Also, since the iron core is a U-shaped integral type, it is possible to generate a strong magnetic field. This provides the advantage of being able to provide a watch motor with a strong rotational force.

``Example'' Figures 1 and 3 show an example of this invention. In this invention, as shown in FIG. 1, the iron core 3 includes a pair of magnetic pole parts 3B and 3C that are parallel to each other, and a magnetic core part 3A that connects one end of the magnetic pole parts 2B and 3C to each other.
, a magnetic pole M protruding from the mutually opposing surfaces of the tips of each of the magnetic pole parts 3B and 3C, and an auxiliary pole 3BB formed from the side end of this magnetic pole M in parallel with the inner side S of the magnetic pole parts 3B and 3C. and 3CC. In other words, magnetic pole part 3
A notch K is formed on the inner side S of B and 3C, and the notch K
By forming the magnetic pole M inside the tips of the magnetic pole parts 3B and 3C. The surface of the magnetic pole M is formed substantially on the extension line of each inner side S of the magnetic pole parts 3B and 3C, and parallel to the extension line. Auxiliary pole 3
BB and 3CC are formed to protrude from the side ends of the magnetic pole M in opposite directions and parallel to the magnetic pole parts 3B and 3C.

The mutually opposing surfaces of the magnetic pole M and the auxiliary poles 3BB and 3CC are actually formed to slightly protrude inward from the inner sides S of the magnetic pole parts 3B and 3C. The amount of protrusion matches the amount of protrusion of the flange 6, which will be described later, and the inner surface of the flange 6 and the inner sides of the auxiliary poles 3BB and 3CC are arranged on a line.

A bobbin 5 is fitted into the magnetic core portion 3A. This bobbin 5 has flanges 6 at both ends thereof, and the bobbin 5 and the flanges 6 are integrally molded from an insulating resin material. Further, the collar 6 is formed with a notch 6A that communicates with the outside, and the bobbin 5 is formed with a slit 5A that communicates with this notch 6A. A protrusion 6B is formed at the outer end of the notch 6A formed in the collar 6, and the protrusion 6B is engaged with the end KS of the notch K formed in the magnetic pole parts 3B and 3C to allow the bobbin 5 and the collar 6 to pass through. Stop it. In this state, as shown in FIG. 2, the inner surface 6C of the collar 6 and the surfaces of the auxiliary poles 3BB and 3CC are arranged on the same plane.

Therefore, by hooking the bobbin 5 in this state to a winding machine (not particularly shown) and winding it,
This winding can be done without being hindered by the auxiliary poles 3BB and 3CC.

A cylindrical body 6D formed on the outside of the collar 6 is a lead wire holding portion of the coil 4. This lead wire holding part 6D
A vinyl-covered wire is press-fitted into the coil, a core wire is exposed at the tip of the vinyl-covered wire, and the winding start and winding wires of the coil 4 are soldered to the exposed core wire to be used as terminals.

"Effect of the invention" As explained above, according to this invention, the bobbin 5
Since the slit 5A is formed in the flange 6 and the notch 6A is formed in the flange 6, the bobbin 5 can be attached to the magnetic core 3A of the iron core 3 formed in a U-shape.

Furthermore, the auxiliary poles 3BB and 3CC are attached to the magnetic pole parts 3B and 3C.
Since the auxiliary poles 3BB and 3 were formed in the direction parallel to
CC does not protrude inward.

As a result, the coil 4 can be directly wound around the bobbin 5 attached to the magnetic core portion 3A, and the coil 4 can be wound in a structure in which the iron core 3 is not divided into two.
Therefore, the magnetic resistance of the iron core 3 is reduced and the efficiency of generating a magnetic field is improved, so that sufficient rotational torque can be generated even if the auxiliary poles 3BB and 3CC are not close to each other along the circumference of the rotor 1.

Further, since the coil 4 is directly wound around the iron core 3, the number of parts is reduced, and there is an advantage that manufacturing can be performed easily.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view for explaining one embodiment of the main part of this invention, Fig. 2 is a plan view for explaining one embodiment of this invention, and Fig. 3 is a side view thereof.
FIG. 4 is a plan view for explaining the structure of a conventional watch motor, and FIG. 5 is a plan view for explaining the problems of the prior art. 1: Rotor, 2: Excitation device, 3: Iron core, 3A:
Magnetic core part, 3B, 3C: Magnetic pole part, M: Magnetic pole, 3
BB, 3CC: Auxiliary pole, 4: Coil, 5: Bobbin,
5A: Slit, 6: Tsuba, 6A: Notch.

Claims (1)

[Scope of Claim for Utility Model Registration] A: A pair of magnetic pole parts parallel to each other, a magnetic core part that interconnects one end of the magnetic pole parts, a magnetic pole protruding inside the tip of the magnetic pole part, and this An iron core consisting of auxiliary poles protruding from the sides of the magnetic pole in directions parallel to the magnetic pole part in opposite directions; B: an insulating bobbin provided with a slit that fits into the magnetic core part of this iron core; C: this insulating bobbin A collar with a notch protruding from both ends and connected to the slit; D A coil wound around the bobbin with both ends regulated by the collar; A watch motor consisting of a rotor that can be mounted freely.