JPH06303730A - Thin type coil - Google Patents

Abstract

PURPOSE:To obtain a thin type coil in which degree of freedoms can be provided in designing a motor, etc., without limiting specifications of the coil in the case of designing the motor, etc. CONSTITUTION:A thin type coil is formed by cutting a winding unit obtained by winding a laminate of a conductor foil and an insulating layer by predetermined number of turns in a predetermined thickness. Two electrodes 2a, 2b, 3a, 3b are respectively formed on inner and outer peripheries of the coil 1, and two or more coils 1 are inserted per one phase to a coil holding board. One of the two electrodes is used as a short-circuiting electrode, and part of a plurality of coils belonging to the one phase is arbitrarily short-circuited to regulate an output of a motor. The two electrodes formed on the inner and outer peripheries of the coil 1 are better to be formed at symmetrical positions.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin coil applicable to, for example, a face-to-face motor.

[0002]

2. Description of the Related Art For example, a face-to-face motor is characterized in that it can be flattened, but in order to make it even flatter, it is required to make the drive coil thinner. There are slice coils and sheet coils as thin coils that can meet such demands. As an example of the slice coil, as described in Japanese Patent Laid-Open No. 61-73552, after a drive coil and a frequency generator (hereinafter referred to as “FG”) coil are integrated by insert molding,
It is known that it is sliced to an appropriate thickness. on the other hand,
The sheet coil can be obtained by patterning a conductor foil into a coil shape by plating or etching, forming the coil into a multilayer by a required number of turns, and further plating an FG coil pattern.

[0003]

However, when the above slice coil or sheet coil is applied to a motor or the like, the motor design is limited to the slice coil or sheet coil and there is no degree of freedom. There was a problem that the coil had to be redesigned.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and is the invention described in Japanese Patent Application Laid-Open No. 4-355637 previously filed by the present applicant, that is, an insulating layer is formed on a conductor foil. The laminated body is wound a predetermined number of times to form a wound body, and the wound body is cut into a predetermined thickness to obtain a thin coil. On the other hand, a plurality of coils are formed on a coil holding substrate made of molding resin. A coil insertion portion is formed, an electrode portion for coil connection is formed in each coil insertion portion, the coil is inserted into each coil insertion portion, and the connection electrodes at the beginning and end of the winding are used for the coil connection. Based on a thin coil that is connected to the electrode part, the device is not limited to the specifications of the thin coil by further devising the thin coil, and it is possible to give flexibility to the design of the motor. Aim to provide To.

Further, according to the present invention, when the thin coil is inserted and arranged in the coil insertion portion of the coil holding substrate, if the winding direction of the thin coil is not mistaken, the coil of the coil holding substrate can be selected without selecting the circumferential direction of the thin coil. It is an object of the present invention to provide a thin coil that can be inserted into an insertion portion and connected to improve the workability of assembly.

[0006]

SUMMARY OF THE INVENTION The present invention is a thin coil obtained by cutting a wound body, which is obtained by winding a laminated body in which a conductor foil and an insulating layer are laminated a predetermined number of times, into a predetermined thickness. It is characterized in that two electrodes are formed on each of the surface and the outer peripheral surface, and two or more of the above coils are inserted and arranged in the coil holding substrate per phase. It is more preferable that the two electrodes on each of the inner peripheral surface and the outer peripheral surface of the coil are formed at symmetrical positions.

[0007]

[Function] The coil is inserted into all the coil insertion portions of the coil holding board, or the coil insertion portions are skipped by one or two and the coils are inserted, and the connecting electrode portions inside and outside the coil frame are jumpered. By connecting with, the number of coils to be substantially used can be set arbitrarily. When two electrodes are formed on each of the inner peripheral surface and the outer peripheral surface of the coil at symmetrical positions, the coils can be arranged and connected without being restricted by the circumferential direction of the coil.

[0008]

Embodiments of the thin coil according to the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 indicates a thin coil. This thin coil 1
A laminated body in which an insulating material is laminated on both front and back surfaces or one surface of a conductor foil made of copper foil or the like is wound a predetermined number of times to obtain a wound body, and the wound body has a predetermined thickness, for example, 0.4 to 1.0 mm. It is obtained by cutting in a circular slice. A multi-wire saw, a band saw, or the like is used to cut the wound body.
Two electrodes 2a and 2b are formed at symmetrical positions on the inner peripheral side of the thin coil 1, and two electrodes 3a and 3b are also formed at symmetrical positions on the outer peripheral side of the thin coil 1. The two electrodes 2a and 2b are located at the beginning and near the winding of the conductor foil, and the two electrodes 3a and 3b are located at the end and near the winding of the conductor foil. Each of the electrodes 2a, 2b, 3a, 3
Each of b is formed by removing a part of the insulating material laminated on the conductor foil and exposing a part of the conductor foil.

The thin coil 1 is fitted on a coil holding substrate and mounted on a motor or the like. 2 and 3 show examples of the coil holding substrate 20. 2 and 3, reference numeral 1
The metal pattern plate 11 indicated by 1 is formed so as to form a predetermined conductive pattern by press punching or etching the metal plate. A coil frame 13 integrated with the metal pattern plate 11 is formed on one surface side of the metal pattern plate 11 by integrally molding an insulating resin. When molding the coil frame 13, the coil frame 1
A plurality of coil insertion portions 12 corresponding to the planar shape of the thin coil 1 are formed at a plurality of positions at regular intervals in the circumferential direction of 3.

A part of the metal pattern plate 11 is exposed as a connection electrode from the insulating resin portion on the bottom surface of each coil insertion portion 12. The connection electrode 15 exposed inside each coil insertion part 12 is the electrode 2a or 2 on the winding start side of the thin coil 1.
The electrode connected to b and the connection electrode 16 exposed to the outside of each coil insertion portion 12 are the electrodes 3 on the winding end side of the thin coil 1.
It is an electrode connected to a or 3b. Each coil insertion part 12
The thin coil 1 is inserted into the thin coil 1 and subjected to reflow soldering or the like, so that each electrode 2a or 2b and electrode 3a or 3b of each thin coil 1 is connected to a predetermined connection electrode of the metal pattern plate 11. The metal pattern plate 11 is each thin coil 1
Are connected in a predetermined pattern with a predetermined number of phases, for example, a three-phase Y-shape, and this is led to an external circuit via a connector portion.

Two or more thin coils 1 are assigned per phase. In the illustrated example, the coil holding substrate 20 is 9
Since the coil insertion portion 12 is provided, three coils 1 can be assigned to each phase in the case of a three-phase configuration, or two coils 1 can be assigned to each phase. Further, it may have a two-phase configuration as necessary, or may have an appropriate number of other phase configurations. The number of coil insertion portions 12 of the coil holding board 20 can be set appropriately.

According to the embodiment described above, in the thin coil 1 obtained by cutting the wound body obtained by winding the laminated body in which the conductor foil and the insulating layer are laminated a predetermined number of times into a predetermined thickness, Two electrodes 2a and 2b are provided on the peripheral surface and the outer peripheral surface, respectively.
And 3a and 3b are formed and two or more coils 1 are inserted and arranged per phase in the coil holding substrate 20, one of the two electrodes formed on the inner peripheral surface and the outer peripheral surface of the thin coil 1 respectively. If one is used as a short-circuiting electrode for the coil, it is possible to adjust the torque or other output of the motor or the like by arbitrarily short-circuiting a part of the plurality of coils 1 belonging to one phase. In addition, the coil 1 is inserted into all the coil insertion portions 12 of the coil holding substrate 20, or the coil 1 is inserted by skipping one or two of the coil insertion portions 12, and the electrodes on the inner peripheral side of each coil 1 are inserted. By connecting with jumper wires, the number of coils 1 to be used can be set to any value, and the same parts can be used for multiple specifications such as motors. Has the effect of improving.

Further, since the two electrodes 2a, 2b and 3a, 3b on the inner peripheral surface and the outer peripheral surface of the coil 1 are formed at symmetrical positions, the circumference of the coil 1 must be correct unless the front and back of the coil 1 are mistaken. They can be arranged and connected without being restricted by the direction, and the workability of assembling the thin coil can be improved.

In the above embodiment, the electrodes 2a and 2b and the electrode 3 are provided at two locations on the inner circumference side and the outer circumference side of the coil 1, respectively.
Although a and 3b are formed, the inner circumference side and / or the outer circumference side may be used as electrodes, and in this case, the same effect as the above effect can be obtained.

As described above, the coil frame 13 is integrally formed on one side of the metal pattern plate 11, and the back side of the metal pattern plate 11 is exposed from the back side of the coil frame body 13 as shown in FIG. However, the insulating layer 21 is formed on the back surface of the coil frame 13 as shown in FIG. 4, and the back surface of the metal pattern plate 11 is covered with the insulating layer 21 to be insulated. Further, on the surface of the insulating layer 21, a power generation coil pattern 22 including an FG coil pattern 23 and a rotation reference signal power generator (PG) coil pattern 24 is further formed. Each end of the power generation coil pattern 22 is electrically connected to the predetermined connection electrodes 17, 18, 19 of the metal pattern plate 11. The connection electrodes 17, 18 and 19 are located relatively close to the metal pattern plate 11.

Therefore, as shown in FIG. 5, the conductor foil material 4 before forming the metal pattern plate 11 by press punching or the like has a limited width sufficient to include the connection electrodes 17, 18 and 19. Gold or silver plating 5 is applied in stripes in the longitudinal direction of the conductor foil material 4, and then the conductor foil material 4 is used to punch out a metal pattern plate 11 having a predetermined pattern as shown in FIG. Form. The formed metal pattern plate 11 has the connection electrodes 17, 18,
The connection electrodes 17, 18, and 19 are included in the range of the plating 5, and the plating 5 is applied. The insulating layer 21 is formed so that the connection electrodes 17, 18 and 19 are exposed.
7, 18, 19 and each end of the power generation coil pattern 22 are electrically connected. Since the connecting electrodes 17, 18, 19 are plated with gold or silver 5, the connecting electrodes 17, 1
The connection between 8, 19 and each end of the power generation coil pattern 22 is stably and reliably performed.

The plating 5 is FG of the metal pattern plate 11
It is applied only on the joint side with the pattern or on both sides. Therefore, a part of the connection electrodes 1 connecting the electrode portions of the coil 1
5, 5 and 16 are also plated, and the connection electrodes 15 and 16 are
There is an advantage that the connection between the electrode part of the coil 1 and the electrode part of the coil 1 is stable and reliable. Further, since the plating 5 is not applied to the entire conductor foil material 4 but is applied in a stripe shape in a necessary area, it is possible to avoid a cost increase.

As shown in FIG. 6, in the metal pattern plate 11 obtained by only punching out the conductor foil material 4, each pattern has an inner peripheral side or an outer peripheral side so that each pattern can be handled as an integrated body. They are tentatively joined together in a connecting pattern. The above-described coil frame 13 is insert-molded on the metal pattern plate 11 in which the respective patterns are integrally combined, and further, the connection pattern of the metal pattern plate 11 is cut to form the metal pattern 11 as shown in FIG.
Becomes

The thin coil according to the present invention can be used not only as a drive coil for a surface-opposed motor, but also as a coil for a deflection yoke, a transformer, and other various devices.

[0020]

According to the present invention, in a thin coil 1 obtained by cutting a wound body obtained by winding a laminated body in which a conductor foil and an insulating layer are laminated a predetermined number of times into a predetermined thickness, an inner peripheral surface of the thin coil. Since two electrodes are respectively formed on the outer peripheral surface and the outer peripheral surface, if one of the two electrodes formed on the inner peripheral surface and the outer peripheral surface of the thin coil is used as a short circuit electrode for the coil,
By arbitrarily short-circuiting a part of the plurality of coils belonging to one phase, it is possible to adjust the torque or other output of the motor or the like. In addition, 2 coils per phase
Since it is arranged to insert more than one coil holding board,
By inserting and arranging the coil in all the coil inserting parts of the coil holding board, or inserting and arranging the coil by skipping one or two coil inserting parts, and connecting the electrodes of each coil with jumper wires, Since the same component can be used for a plurality of specifications such as a motor, the number of coils used for can be arbitrarily set, and the degree of freedom in design is improved.

Further, since the two electrodes on each of the inner peripheral surface and the outer peripheral surface of the coil are formed at symmetrical positions, the coils are arranged and connected without being caught in the circumferential direction of the coil unless the front and back of the coil are mistaken. Therefore, the workability of assembling the thin coil can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a thin coil according to the present invention.

FIG. 2 is a plan view showing an example of a holding substrate that holds the thin coil of the same.

FIG. 3 is a bottom view of the same holding substrate.

FIG. 4 is a bottom view showing a state in which an insulating layer and a power generation coil pattern are formed on the holding substrate.

FIG. 5 is a plan view showing an example of a conductor foil material applicable to the present invention.

FIG. 6 is a plan view showing an example of a metal pattern plate formed of the same conductor foil material as above.

[Explanation of symbols]

 1 Thin coil 2a electrode 2b electrode 3a electrode 3b electrode 20 Coil holding substrate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuya Moriyama 14-888 Ako, Komagane-shi, Nagano Stock company Sankyo Seiki Seisakusho Komagane factory

Claims (2)

[Claims] 1. A thin coil obtained by cutting a wound body, which is obtained by winding a laminated body in which a conductor foil and an insulating layer are laminated a predetermined number of times, into a predetermined thickness. Two coils are provided on each of an inner peripheral surface and an outer peripheral surface of the coil. And a plurality of the coils are inserted and arranged in a coil holding substrate for each phase. 2. The thin coil according to claim 1, wherein two electrodes each formed on the inner peripheral surface and the outer peripheral surface of the coil are formed at symmetrical positions.