JPH0548554U - Coil block for thin watch motor - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a coil block for a thin timepiece motor, which can prevent a short circuit and can reduce the cost by reducing the number of processes. A coil block for a thin timepiece motor, in which a coated coil wire is wound around an iron core, the insulating coil portion being formed by directly winding the coil wire around the iron core, and the insulating coil portion. Of the energizing coil part formed by winding a coil wire around the circumference, preferably, the insulating coil part and the energizing coil part are formed by a continuous coil wire, and the energizing coil part start part and the end part are formed. To form a connection terminal.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a coil block for a thin timepiece motor formed by winding a coil wire coated on an iron core.

[0002]

[Prior Art]

 In a motor for a timepiece, a long rod-shaped iron core is covered with a cylindrical bobbin, and the covered coil wire is wound in multiple layers through the bobbin. Then, by energizing this coil wire, the iron core is magnetized, and various mechanisms (especially the rotor) of the timepiece are driven by the attractive force or repulsive force of the generated magnetic force. In addition, this bobbin uses an insulating material such as resin, and this bobbin prevents contact between the iron core and the coil wire, and also prevents the coil wire from being stripped by the edge with a sharp iron core. To prevent this, a short circuit is prevented when the power is turned on.

Further, in recent years, in order to reduce the thickness of a timepiece, the insulating bobbin is not necessary to prevent a short circuit, and an insulating tape is wound around a contact portion of an iron core in contact with the coil wire, and It is known that an insulating paint is applied to this contact portion (for example, Japanese Utility Model Publication No. 57-16565). That is, after the iron core is subjected to such a short-circuit prevention measure as described above, the coil wire is directly wound around the iron core to form a coil block for a thin watch.

[0004]

[Problems to be solved by the device]

 As described above, in the conventional coil block described above, the coil winding process and the short-circuit prevention measures such as the insulating agent applying process and the tape winding process are separate processes. If it can be reduced, the cost can be reduced by reducing the man-hours.

Further, in the above case, air bubbles may enter between the insulating tape and the iron core, and in this case, the coil diameter becomes larger than the predetermined size, which adversely affects the thinning of the timepiece. Was also occurring.

Therefore, an object of the present invention is to provide a coil block for a thin timepiece motor capable of preventing a short circuit and reducing the cost by reducing the number of steps.

[0007]

[Means for Solving the Problems]

 The invention according to the first claim of the present application is a coil block for a thin timepiece motor, which is formed by winding a coated coil wire around an iron core, wherein the insulation is formed by directly winding the coil wire around the iron core. The invention comprises a coil portion and an energizing coil portion formed by winding a coil wire around the insulating coil portion. The invention according to the second claim of the present application provides an insulating coil portion and an energizing coil portion. It is formed by a continuous coil wire, and the energizing coil portion start portion and the end portion are drawn out to form a connection terminal.

[0008]

[Action]

 Therefore, according to the invention according to the first claim of the present application, the insulating coil directly wound around the iron core prevents contact between the energizing coil and the iron core to prevent short circuit, which is a separate step. The short-circuit prevention process that was required is no longer necessary, and only the coil winding process is required, and the number of processes can be reduced. Also, since the coil wire is wound to form the insulating layer, air bubbles do not accumulate between the insulating part and the iron core as in tape winding, and the coil block can be formed to a predetermined diameter dimension. ..

According to the second aspect of the present invention, the winding start portion and the winding end portion of the energizing coil are respectively drawn out to serve as connection terminals for the external power source, which is a separate process. The connecting end drawing step that has been used also serves as the coil winding step, and the number of steps can be further reduced.

[0010]

【Example】

 The present invention will be described below based on the embodiment shown in FIGS. As shown in FIG. 1, the thin timepiece motor 1 according to the present embodiment is provided with mounting portions 5 including a side plate 3 and a base plate 4 at both ends of a substantially long bar-shaped iron core 2, and side plates of the iron core 2 are provided. A coil block 6 in which a coil wire is directly wound is provided between 3 and 3. By energizing this coil, the iron core 2 is magnetized, and the generated magnetic force of the iron core is used to drive the rotor.

The iron core 2 is formed of a conductive iron or the like into a substantially rectangular rod shape, and the magnetic field obtained by energizing the coil block 6 wound around the iron core 2 in an annular shape can be further enhanced. Is ready to go. The iron core 2 is provided at both ends with the above-mentioned mounting portions 5 made of a resin such as a non-conductive material. As described above, the mounting portion 5 includes the side plates 3 for aligning both end surfaces of the coil block 6 and the base plate 4 for mounting the thin timepiece motor 1 on a circuit board or the like.

Further, the coil block 6 includes an insulating coil portion 7 formed by a covered coil wire 7 a directly wound around the iron core 2 and a covered coil wire 9 a wound around the coil portion 7. The current-carrying coil portion 9 is formed so that a short circuit can be prevented in a series of coil winding steps.

That is, as shown in FIG. 2, the above-mentioned insulated coil portion 7 is formed by winding small-diameter coated coil wires 7 a along the iron core 2 without any gap. The energizing coil portion 9 is formed by winding a covered coil wire 9a having a diameter larger than that of the insulating coil wire 7a around the insulating coil portion 7. Therefore, the insulated coil portion 7 is formed by tightly winding the insulated coil wire 7a having a small diameter, and the energized coil portion 9 wound with the energized coil wire 9a having a larger diameter is provided around the insulated coil wire 7a. It is ensured that the part 9 does not come into contact with the iron core 2.

In the present embodiment, the insulating coil portion 7 and the energizing coil portion 9 are formed by using the coil wires 7a and 9a having different thicknesses, but coil wires having the same diameter may be used.

As described above, according to the coil block 6 of the thin timepiece motor of the present embodiment, the insulating coil portion 7 wound directly around the iron core 2 causes the energizing coil portion 9 and the iron core 2 to be separated from each other. Since contact is prevented and short circuits are prevented, the short circuit prevention process, which was a separate process, is not required, and only a series of coil winding processes are required, which reduces costs by reducing the number of processes. , Can improve economic efficiency. Further, since the coil wire is wound to form the insulating layer portion, air bubbles do not remain between the insulating portion and the iron core 2 unlike the insulating tape winding, and the coil block 6 has a predetermined diameter dimension. Can be formed, and the timepiece can be reliably made thinner. Further, by using the thin coil wire 7a for the insulating coil portion 7, a thinner and more uniform insulating layer can be formed as compared with the insulating tape winding, and the overall diameter of the coil block 6 can be reduced. The watch can be made thinner.

Next, another embodiment of the present invention will be described with reference to FIGS. 3 and 4. The same members as those in the above embodiment are designated by the same reference numerals. The coil block 6 of the thin timepiece motor according to the present embodiment is formed of the same continuous coil wire 10 having the same insulating coil portion 7 and energizing coil portion 9. The middle and end of the coil wire 10 are drawn out, That is, the winding start portion 11 and the winding end portion 12 of the energizing coil portion 9 are drawn out to serve as connection terminals 13 and 14 for connecting to the external power supply circuit. A pin 4a is provided on the base plate 4 so that the winding start end 11 of the coil wire 10 can be wound.

That is, the coated coil wire 10 is tightly wound around the iron core 2 to form the insulating coil portion 7. Next, the coil wire 10 is pulled out and wound around the pin 4a of the base plate 4, and one connection terminal 13 is formed at the wound coil wire 10 portion. Then, the remaining coil wire 10 is wound around the insulating coil portion 7 so as to form the energizing coil portion 9. Finally, the winding end 12 of the coil wire 10 is pulled out to form the other connecting terminal 14. The connection terminal 13 wound around the pin 4a is formed by removing the coating of the coated coil wire 10 so that the connection terminal 13 can be energized when the power supply circuit is connected.

Therefore, according to this embodiment, in addition to the same effect as that of the first embodiment, the energizing coil portion 9 start portion 11 and end portion 12 of the coil wire 10 are respectively drawn to connect the connection terminals 13 and 14. Therefore, the connection end drawing step, which is a separate step, is also used for the coil winding step, the number of steps can be further reduced, the cost can be reduced, and the economical efficiency can be further enhanced.

[0019]

[Effect of the device]

 As described above, according to the coil block of the thin timepiece motor of the present invention, the insulating coil directly wound around the iron core prevents contact between the energizing coil and the iron core to prevent short. Therefore, the short-circuit prevention process, which is a separate process, is not required, and only the coil winding process is required, so that the number of processes can be reduced and the cost can be reduced. Also, since the coil wire is wound to form the insulation layer, air bubbles do not accumulate between the insulation and the iron core as with insulation tape winding, and a coil block is formed with the planned diameter dimension. Therefore, it is possible to reliably achieve a thin watch.

Further, according to the second aspect of the present invention, since the winding start portion and the winding end portion of the energizing coil are respectively drawn out and used as the connection terminals, in addition to the above-mentioned effect, another step is required. The connection end drawing step, which has been done previously, is also used for the coil winding step, the number of steps can be further reduced, and the cost efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG. 1 of the present embodiment.

FIG. 3 is a partially cutaway front view of another embodiment of the present invention.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3 of the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Thin watch motor 2 Iron core 6 Coil block 7 Insulating coil part 7a Insulating coil wire 9 Energizing coil part 9a Energizing coil wire 10 Coil wire 11 Energizing coil part starting part 12 Energizing coil part ending part 13, 14 Connection terminals

Claims (2)

[Scope of utility model registration request] 1. A coil block for a thin timepiece motor, which is formed by winding a coated coil wire around an iron core, comprising: an insulating coil portion formed by directly winding the coil wire around the iron core; A coil block for a thin timepiece motor, comprising a current-carrying coil portion formed by winding a coil wire around the coil portion. 2. The thin timepiece motor according to claim 1, wherein the insulating coil portion and the current-carrying coil portion are formed of continuous coil wires, and the current-carrying coil portion start portion and end portion are drawn out to form a connection terminal. Coil block.