JPH0214314Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a coreless motor that drives a disk of a disk player.

[Technical background]

Coreless motors for driving disks, which are included in compact disk players, are small and require skill in wiring the components. Therefore, simplifying the wiring process is important not only to increase product reliability but also to improve work efficiency.

[Prior art]

FIG. 7 is a plan view showing the main parts of a conventional coreless motor. A plurality of coils 2 (three in the figure) are fixedly installed around the shaft 1 of this coreless motor. As shown in FIG. 6 (perspective view), each coil 2 is formed by winding a round, small-diameter wire material 3 into a triangular shape, the surface of which is coated with an insulating coating. In order to make one end 3a of the small diameter wire 3 forming each coil 2 into a so-called Y connection as shown in FIG. 9 (circuit diagram), one end 3a of the small diameter wire 3 forming each coil 2 is connected to A means for binding with solder or the like (FIG. 7), or a substrate 4 on which a triangular conductive pattern 4a is formed is attached to the shaft 1, and each vertex 4 of this conductive pattern 4a is attached.
One end 3 of the small diameter wire 3 forming the coil 2 at b
There is a method for soldering a (FIG. 8).

[Problems with conventional technology]

However, the conventional coreless motor described above has the following problems.

(1) When making a Y connection, in FIG. 7, one end 3a of each small diameter wire 3 must be passed near the shaft 1. Yotsutoko Shaft 1
There is a risk that a breakdown voltage failure will occur between the terminal 3a and the one end 3a.

(2) Furthermore, the gap between adjacent coils 2 is narrow, and sufficient solder space is not secured.
Therefore, wiring work takes time.

(3) Furthermore, since the Y connection shown in FIG. 8 requires a special connection board 4, the number of parts increases, and the management of parts becomes complicated accordingly. Further, since the area where one end 3a of the thin wire 3 is soldered is narrow, it is difficult to perform the soldering work.

(4) Also, the space between each coil 2 is fixed by resin molding. This molding process increases the number of man-hours.

[Purpose of this invention]

The present invention was developed in view of the above-mentioned conventional problems, and the purpose is to provide a low-cost coreless motor in which the Y-connection of the coils can be easily performed without wiring, and the withstand voltage is sufficiently guaranteed. It is said that

[Structure of the present invention]

In the coreless motor according to the present invention, a plurality of coils formed by winding a wire rod coated with an insulating film around a flat conductive wire are provided around the shaft, and adjacent portions of each coil are arranged around the shaft. The flat conductive wires are exposed, and the exposed flat conductive wires are connected to each other using a conductive bonding agent such as solder.

[Example of the present invention]

Embodiments of the present invention will be described below with reference to the drawings of FIGS. 1 to 5.

Figure 1 is a perspective view of the coil, Figure 2 is a sectional view of the coil, Figure 3 is a sectional view of the coreless motor, Figure 4 is a plan view showing the main parts of the coreless motor, and Figure 5 is the circuit of the coreless motor. It is a diagram.

(Configuration of Example) Reference numeral 16 in the figure is a coil. This coil 1
6, a flat conductive wire 11a made of copper wire or the like is coated with a fusion coating 11b, and a wire 11 having an insulating coating 11c applied to the surface thereof is wound in three shapes. It is formed by

As shown in FIG. 4, three coils 16 are arranged around the shaft 1 at equal intervals. The mutually opposing vertices 16a of each coil 16 are the shaft 1
It is fixed to a substrate 13 that is mounted on a shaft. Also,
As shown in FIG. 1, flat conductive wires 11a are exposed from mutually adjacent portions A of each coil 16. The insulating coating 11c and the fusion coating 11b that were adhered to this adjacent portion A were peeled off using chemicals or mechanical means.

These adjacent parts A are connected by a conductive bonding agent 18 such as solder or conductive paste. Each coil 16 forms a so-called Y connection as shown in FIG. 5 by means of the conductive bonding agent 18. At the same time, each coil 16 is integrally connected by a conductive bonding agent 18.

In addition, a commutator 1 is placed in the center of the board 13.
3a is formed. This commutator 13a
is divided into six parts, and for each part, one coil
The flat conductive wire 11a exposed from one end 11d of the wire 11 forming the varistor (not shown)
connected via.

Further, this commutator 13a is fixed to the shaft 1 via an insulating member 20. The base end of the shaft 1 is supported by a thrust bearing 12 fixed to the center of the bottom of the motor housing 10. A power distribution board 15 is erected around the thrust bearing 12. Inwardly from this distribution board 15, conductive brushes 14a on the positive side and negative side,
14b is protruded. This conductive brush 14
a, 14b are in sliding contact with the commutator 13a (see FIG. 5). Each commutator 13
a, the current on the distribution board 15 is connected to the conductive brushes 14a,
14b.

Further, the upper part of the motor housing 10 is open, and a mounting plate 10a is attached to this opening. A radial bearing 17 is press-fitted into the center of this mounting plate 10a, and the upper part of the shaft 1 is supported by this radial bearing 17. Furthermore, a magnet 1 is mounted on the inner surface of the mounting plate 10a.
9 is fixedly installed. This magnet 19 is formed into a ring shape and is opposed to the coil 16. The surface of the magnet 19 facing the coil 16 has an S along the rotational direction of the coil 16.
Poles and north poles are arranged alternately.

(Operation of the embodiment) Next, the operation of the embodiment with the above configuration will be explained.

The procedure for assembling the coils 16 is to first arrange three coils 16 around the shaft 1 at equal intervals.
Thereafter, the mutually facing vertices 16a are fixed to the substrate 13. Next, a conductive bonding agent 18 such as solder or conductive paste is filled between the flat conductive wires 11a exposed from the adjacent portion A of each coil 16, thereby forming a so-called Y connection as shown in FIG. . This filling operation does not require wiring between the adjacent parts A, and since there is sufficient space, it can be performed as easily as possible. Furthermore, since each coil 16 is integrally connected by the conductive bonding agent 18, it becomes strong.

Next, the operation of the coreless motor will be explained.

When a current is passed from the power distribution board 15 to the conductive brushes 14a and 14b, this current flows through each of the six commutators 13a, and the coil 16 is energized. The current flowing through the coil 16 and the magnetic flux emitted from the magnet 19 and passing through the coil 16 generate a starting force in the shaft 1, and the shaft 1 is supported by the bearings 12 and 17 and rotates.

(Modification) In the illustrated embodiment, the coil 16 serves as a rotor, but the motor may have a magnet 19 as a rotor.

[Effects of this invention]

As described above, according to the present invention, the following effects can be achieved.

(1) A plurality of coils, which are formed by winding a wire coated with an insulating film around a flat conductive wire, are provided around the shaft, and the adjacent portions of each coil are connected to the flat conductive wire. is exposed, and the exposed flat conductive wires are connected to each other via a conductive bonding agent.
The so-called Y connection is made without wiring. Therefore, assembly work is simple and efficient.

(2) Furthermore, since the Y connection is made without wiring, there will be no breakdown voltage failure between the Y-connection and the shaft as in the conventional case. Therefore, the reliability of the product is increased.

(3) Furthermore, since the coils are bonded using a conductive bonding agent, conventional molding is not required, and the process can be simplified.

(4) Also, the number of parts is small, making parts management easier.

[Brief explanation of the drawing]

Figures 1 to 5 show examples of the present invention, with Figure 1 being a perspective view of the coil, Figure 2 being a sectional view of the coil, Figure 3 being a sectional view of the coreless motor, and Figure 4 being a sectional view of the coreless motor. is a plan view of the coreless motor, Fig. 5 is a circuit diagram of the coreless motor, Figs. 6 to 9 show conventional examples, Fig. 6 is a perspective view of the coil, and Fig. 7 is a plan view of the coreless motor. 8 is a plan view of another coreless motor, and FIG. 9 is a Y-connection circuit diagram. 1a...Flat conductive wire, 11c...Insulating coating, 1
DESCRIPTION OF SYMBOLS 1... Wire, 16... Coil, 18... Conductive bonding agent, A... Adjacent part.

Claims (1)

[Scope of utility model registration request] In a coreless motor in which a plurality of coils formed by winding a wire coated with an insulating film around a flat conductive wire are provided around the shaft, and a magnet is provided opposite to each of the coils, each of the above-mentioned A coreless motor characterized in that the flat conductive wires are exposed in adjacent portions of the coil, and the exposed flat conductive wires are connected to each other via a conductive bonding agent.