JPH04137452U - thin coil - Google Patents

Abstract

(57) [Summary] [Purpose] By integrating the coil with resin, a high space factor can be ensured, and the FG coil pattern can be easily formed with high accuracy in roundness and coaxiality. Provides thin coils. [Structure] A plurality of recesses into which a plurality of coils are inserted and arranged are formed in a substrate 8 made of molded resin, the coils are inserted and arranged in each recess, and a reference hole 1 of the substrate is formed on the surface of the substrate.
A coil pattern 12 for a frequency generator was provided using 1 as evidence.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention is a thin type generator with a frequency generator (hereinafter referred to as "FG") coil pattern. It relates to a coil, and is applicable to, for example, a surface-facing motor.

0002

[Conventional technology]

Coils integrated with resin are known as coils suitable for flat surface-facing motors. ing. As an example of providing an FG coil pattern on such an integrated coil, There is a slice coil as described in Japanese Patent No. 61-73552. Figure 7 shows an example of this sliced coil, in which copper foil coated with insulating resin on one side is glued. The coil 21 and the copper foil are formed into a corrugated shape with the intervention of The FG coil pattern 22 formed into a circular shape is integrated by molding. Also, it can be obtained by slicing it to the appropriate thickness as shown by the dotted line. Ru. Further, a sheet coil (not shown) may be used in some cases. This is due to plating. pattern the coil, make it multi-layered by the required number of turns, and then pattern the FG coil pattern. Formed by plating turns.

0003

[Problem that the idea aims to solve]

In the case of a sliced coil as shown in Figure 7, a high coil space factor can be obtained. However, when integrally molding, it is necessary to accurately position the FG pattern 22 in the mold. It is difficult to fit, easily bends or deflects, and has poor roundness and coaxiality with the center axis. It has disadvantages such as not being easily obtained.

0004 In addition, in the case of sheet coils, it is easy to install the FG sensor, but the space factor of the coil It is difficult to improve the performance of the motor because of the low

[0005] This invention was made to solve these problems, and the coil is made of resin. By integrating the Our goal is to provide a thin coil that can achieve high accuracy in roundness, coaxiality, etc. The porpose is to do.

[0006]

[Means to solve the problem]

This invention consists of multiple recesses in which multiple coils are inserted into a substrate made of molded resin. A coil is inserted into each recess, and a substrate is placed on the surface of the substrate. A feature is that a frequency generator coil pattern is provided using the reference hole as evidence. In addition, the above-mentioned coil connection pattern is arranged on the inner surface of the above-mentioned recess, and the coil terminal and May be connected.

[0007]

[Effect]

Coils are placed in a plurality of recesses of a molded resin substrate and integrated. In the center of the molded board A reference hole is provided, and an FG coil pattern is formed using this reference hole as a proof. child This allows the FG coil pattern to be arranged with high precision. If a pattern for coil connection is formed on the inner surface of the concave part of the board, the coil can be connected inside the board. can be wired.

[0008]

【Example】

Examples of the thin coil according to the invention will be described below with reference to the drawings. First, an example of a method for manufacturing a single coil will be described. In Figure 1, the winding core 1 In this case, a copper foil 2 coated with an insulating resin on one side is wrapped with an adhesive interposed. roll After the adhesive between the attached layers of copper foil 2 has hardened, pull out the winding core 1 and insert it as shown in Figure 2. The coil 3 is formed by slicing the sea urchin to a predetermined width (0.4 to 1 mm). this method The coil 3 formed by is thin and has a high space factor.

[0009] Next, an example of a molded resin substrate used in the present invention will be explained. In Figure 3, the molding The upper surface side of the injection molded substrate 8 formed of resin has a planar shape of the coil 3. A plurality of matching recesses 4 are formed at regular intervals in the circumferential direction, and the bottom of each recess 4 A bonding land 6 is formed at the portion that protrudes to face the inner circumferential surface of the coil 3. has been done. The coil 3 is inserted into each recess 4 by slicing it into a predetermined width as described above. The components are placed in one piece and integrated using methods such as gluing, press-fitting, etc. The substrate 8 is based at the center. It has a reference hole 11, and the recess is formed around this reference hole 11.

0010 Since the coil 3 explained in FIGS. 1 and 2 is formed by wrapping the copper foil 2, the terminal are located on the side surface of the central hole and on the outer peripheral surface. Therefore, injection molding of coil 3 When installing and wiring on the board 8, use a wiring pattern that matches the shape of the coil 3. It is arranged on the substrate 8 in advance. That is, the coil 3 is placed in a recess on the injection molded substrate 8. 4, the terminal at the end of winding on the outer circumferential surface of the coil 3 is placed on the outer circumferential surface of the recess 4. In addition, the winding start portion on the side surface of the center hole of the coil 3 protrudes from the bottom surface of the recess 4. In contact with the bonding land 6. Therefore, as shown in FIG. 4, the terminals of each connection pattern 7 are connected to the outer peripheral surface of the recess 4 and the bonding land. It is arranged so that it is on top of 6. Reference numeral 7a indicates a wiring pattern arranged on the bonding land 6. The terminal of the wire 7, 7b, is the terminal of the wiring pattern 7 arranged on the outer peripheral surface of the recess 4. Shown below.

[0011] In such a wiring pattern, the coil 3 can be connected simply by fitting it into the recess. The beginning of winding of coil 3 is in contact with terminal 7a, and the end of winding of coil 3 is in contact with terminal 7b. After removing the insulation coating from the beginning and end of the coil 3 and inserting it into the recess 4. The connection of coil 3 can be completed simply by reflow soldering, which is much easier than conventional soldering. There is no hassle of wiring like with rice coils. Note that the wiring pattern in Figure 4 According to this, six coils 3 are connected in a three-phase Y type.

0012 After inserting and arranging the coil 3 into the recess 4 of the substrate 8 and integrating it in this way, the 6, an FG pattern 12 is formed using silver (Ag) on the flat and smooth back surface of the substrate 8. Or print using a paste such as copper (Cu). The FG pattern 12 is on the board 8. It is formed based on the inner diameter of the reference hole 11 in the center. By doing this, FG High precision FG pattern 12 that makes it easy to obtain pattern roundness and coaxiality with respect to the inner diameter It is possible to form

[0013] A coil power supply terminal for external connection is provided on the outer peripheral side of the board 3 made of injection molded resin. Three 10's and two FG output terminals 9 are printed.

[0014] In addition, in the embodiment, a sliced coil was used, but in this invention, a sliced coil is used. Not only coils but also other coils can be applied.

[0015]

[Effect of the idea]

According to the present invention, each coil is positioned on the molded substrate, and the Since the FG coil pattern was provided on the surface of the board using the reference hole of the board as evidence, the FG coil It has become possible to easily form patterns with high precision. In addition, the recessed part of the above board A pattern for coil connection is arranged on the inner surface of the coil so that it can be connected to the terminal of the coil. For example, there is an advantage that the coils can be connected extremely easily within the substrate.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of a coil forming process applicable to the present invention.

FIG. 2 is a perspective view showing another step following the coil forming step.

FIG. 3 is a perspective view showing an example of an injection molded substrate applicable to the present invention.

FIG. 4 is a plan view of an injection molded substrate applicable to the present invention.

FIG. 5 is a perspective view showing an embodiment of a thin coil according to the present invention.

FIG. 6 is a perspective view showing the thin coil according to the present invention turned inside out.

FIG. 7 is a perspective view showing an example of a conventional slice coil.

[Explanation of symbols]

3 coil 4 Recess 8 Substrate 11 Reference hole 12 Coil pattern for frequency generator

──────────────────────────────────────────────── ─── Continuation of front page (72) Creator Takafumi Kuwasawa 14-888 Ako, Komagane City, Nagano Prefecture Co., Ltd. Inside the Komagane factory of Shasankyo Seiki Seisakusho (72) Creator Hisamasa Kobayashi 14-888 Ako, Komagane City, Nagano Prefecture Co., Ltd. Inside the Komagane factory of Shasankyo Seiki Seisakusho (72) Creator Tetsuo Hoshina 14-888 Ako, Komagane City, Nagano Prefecture Co., Ltd. Inside the Komagane factory of Shasankyo Seiki Seisakusho

Claims (2)

[Scope of utility model registration request] 1. A plurality of recesses into which a plurality of coils are inserted and arranged are formed in a substrate made of molded resin, and the coils are inserted and arranged in each of the recesses, and a reference hole of the substrate is used as evidence on the surface of the substrate. A thin coil characterized by having a coil pattern for a frequency generator. 2. The thin coil according to claim 1, wherein a coil connection pattern is provided on the inner surface of the recess of the substrate and connected to a terminal of the coil.