JPH0617347U - Thin coil holding substrate - Google Patents

Abstract

(57) [Abstract] [Purpose] In a holding substrate of a thin coil in which a coil frame body and a metal pattern plate are integrally molded, terminals drawn from the metal pattern plate are regulated from the width direction, and a force applied from the lateral direction is used. Prevents terminals from bending and unevenly arranging multiple terminals to facilitate external connection. [Structure] A terminal (22) led out of a coil pattern body (10) from a metal pattern plate (14) is bent, and a recessed portion (24) for holding this bent portion is formed on a side surface of the coil frame body (10) corresponding to the bent portion. Formed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a thin coil holding substrate formed by integrally molding a coil frame and a metal pattern plate, and is applicable to a motor or the like.

[0002]

[Prior art]

 The present applicant has previously filed a patent application for a thin coil holding substrate in which a coil frame body made of resin having a plurality of coil-shaped insertion portions and a metal pattern plate formed in a wiring pattern are integrally molded. did. The invention of Japanese Patent Application No. 3-339714 is one of them. According to the thin coil holding substrate according to this application, the wiring pattern can be arranged at the same time when the coil frame is formed, and the ends of each coil are connected to the wiring pattern, and the wiring pattern is connected to the wiring of the substrate. Since the connection of each coil is completed simply by connecting it to the pattern, there is an advantage that the connection of the coils is simple.

On the holding substrate of the thin coil according to the above application, the connection portion of each wire of the connection pattern with the coil is bent toward the coil terminal, and the bent portion and the coil terminal are connected by soldering or the like. Those with additional configurations are also considered.

In the holding base plate of the thin coil in which the coil frame body made of resin having a plurality of coil-shaped insertion portions as described above and the metal pattern plate formed in the wiring pattern are integrally molded, In order to connect the wire connection pattern of the metal pattern board to the external circuit, the wire connection pattern is cut around the coil frame body and then bent and used.

[0005]

[Problems to be solved by the device]

 Since the wiring pattern of the metal pattern board is thin, if you cut this wiring pattern around the coil frame to connect it to an external circuit and bend it to use it as a terminal, force will be applied laterally. There is a problem that when it is damaged, it is easily bent and the terminal is easily broken. However, if the thin coil is for a tape recorder capstan motor, the coil holding board is mounted directly on the tape recorder board, and since the number of terminals is small, it is only necessary to bend the terminals. It doesn't matter. However, if the thin coil is for a rotary drive motor of a rotary drum head, the coil holding substrate cannot be mounted directly on the substrate of the tape recorder, and the terminal becomes long, causing bending and breakage due to lateral force. There is a problem that it is easy. In addition to the coil terminals, many terminals such as frequency generator (hereinafter “FG”) coil terminals and reference position signal generator (hereinafter “PG”) coil terminals are provided from the coil holding substrate. Since it becomes necessary, the terminals will be bent by a slight lateral force and the terminals will become uneven, which will be a troublesome work for connecting with the outside.

The present invention has been made in view of the above circumstances, and is a thin coil holding substrate formed by integrally molding a coil frame body and a metal pattern plate, in which terminals drawn from the metal pattern plate are provided. By restricting from the width direction, it is possible to prevent the terminals from bending due to the force applied from the lateral direction, and also to prevent the terminals from becoming misaligned, and to provide a thin coil holding board that facilitates external connection. The purpose is to provide.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention integrally molds a coil frame body made of resin having a plurality of coil-shaped insertion portions and a metal pattern plate formed in a connection pattern shape. The coil frame was provided with a terminal led to the outside, the terminal was bent, and a recess for holding the bent part was formed on the side surface of the coil frame corresponding to the bent part.

[0008]

[Action]

 The terminals led out from the metal pattern plate to the outside of the coil frame are bent and held in the recesses on the side surfaces of the coil frame, so that the terminals are aligned in the recesses. Even if a force is applied to the terminal from the lateral direction, the terminal is restricted by the recess and is hard to bend.

[0009]

【Example】

 An embodiment of a holding substrate for a thin coil according to the present invention will be described below with reference to the drawings. First, the overall configuration will be schematically described. In FIG. 1, reference numeral 10 indicates a coil frame body, which is made of resin and has a plurality of coil-shaped insertion portions 12. The coil frame body 10 is integrally formed with a metal pattern plate 14 formed in a connection pattern. However, only one surface side (the lower surface side in FIG. 1) of the metal pattern plate 14 is integrally molded with the coil frame 10, and the connection pieces 18 and 20 with the coil of the metal pattern plate 14, which will be described in detail later, are the above-mentioned. It is integrally molded with the coil frame body 10 so as to be exposed at the insertion portion 12. In the figure of the coil frame body 10, an undercoat 26 is applied to the upper surface of the coil frame body 10 to cover the metal pattern plate 14. An FG coil pattern 28 and a PG coil pattern described later are formed on the undercoat 26, and an overcoat 30 is applied on the FG coil pattern 28.

From the metal pattern plate 14, a terminal 22 integral with the pattern plate 14 is led out to the outside from the side surface of the coil frame 10. As will be described in detail later, a plurality of terminals 22 are led out in parallel, and each terminal 22 is held integrally and in parallel by an insulating holding body 32. Each terminal 22 is bent at a right angle downward in the drawing between the side surface of the coil frame body 10 and the holding body 32, and the bent portion is formed in the recess 24 formed on the side surface of the coil frame body 10 corresponding to the bent portion. Are fitted, and each terminal 22 is held by the corresponding recess 24. The FG coil pattern 28 and the PG coil pattern penetrate the undercoat 26 and are electrically connected to the corresponding terminals 22 of the metal pattern plate 14. A thin coil 40 is inserted and fixed in each of the insertion portions 12 of the coil frame body 10, and the winding start and winding end thereof are respectively soldered to the connection pieces 20 and 18 of the metal pattern plate 14 by soldering or the like. It is connected. The method for manufacturing the thin coil 40 is not particularly limited, but for example, a single thin coil 40 is obtained by slicing in a direction crossing a winding body formed by winding a conductive plate in a tubular shape. It may be one.

Next, the above embodiment will be described in more detail while describing an example of the manufacturing process of the above embodiment. First, as shown in FIG. 2, a wiring pattern 16 for connecting a plurality of coils in a predetermined shape, and the winding start and winding end of each coil formed at one end of each wiring pattern 16 are connected. The metal pattern plate 14 including the connecting pieces 20 and 18 and the plurality of terminals 22 connected to the other ends of the respective wiring patterns 16 and the FG pattern and the PG pattern is produced. The method for manufacturing the metal pattern plate 14 is not limited, but can be obtained relatively easily by punching the conductive plate with a press. At the stage of making the metal pattern plate 14 by press punching or the like, the connection patterns 16 and the terminals 22 are integrally connected by the connecting pieces, but in FIG. 2, the connecting pieces are removed. The final pattern of the metal pattern plate 14 is drawn. In the example of FIG. 2, the connection pattern 16 is formed so that the nine coils are divided into three phases and connected in a Y shape.

Next, the metal pattern plate 14 is insert-molded with resin from one side thereof. This resin forms the coil frame 10, and the front side is shown in FIG. As shown in FIG. 5, the coil frame body 10 has a plurality of coil-shaped insertion portions 12 on the front side, and each insertion portion 12 is exposed with the connection pieces 20 and 18 of the metal pattern plate 14. . The plurality of terminals 22 of the metal pattern plate 14 are exposed from the side surface of the coil frame body 10. The plurality of terminals 22 are bent at right angles as shown in FIG. 6 later, and the side portions of the coil frame body 10 where the terminals 22 are exposed hold the bent portions corresponding to the bent portions of the terminals 22. A concave portion 24 for forming is formed. Further, simultaneously with the molding of the coil frame body 10, a holding body 32 for integrally holding the above-mentioned terminals 22 is integrally molded with resin, and if necessary, an auxiliary holding body 36 is formed with a resin as shown in FIG. Are integrally molded with. An appropriate gap is provided between the holding body 32 and the side surface of the coil frame body 10, and an appropriate gap is also provided between the holding bodies 32 and 36. At the stage of integrally insert-molding the coil frame body 10 together with the metal pattern plate 14, the connecting pieces for integrally connecting the respective patterns of the metal pattern plate 14 are removed, and the shape of the metal pattern plate 14 is shown in FIG. Make the final pattern as shown.

Since the other surface of the metal pattern plate 14 is exposed on the back surface side of the coil frame body 10, next, as shown in FIG. 3, an undercoat 26 is applied to the entire back surface of the coil frame body 10. The metal pattern plate 14 is covered. Next, as shown in FIG. 3, the FG pattern 28 is formed on the undercoat 26 over substantially one turn, and the PG pattern 34 is formed outside the FG pattern 28. The undercoat 26 interposed between the ends of these patterns 28 and 34 and the terminals 22 corresponding to these ends has been removed in advance, and as described with reference to FIG. The parts are electrically connected to the corresponding terminals 22. An overcoat 30 is further applied from above each pattern 28, 34.

The plurality of terminals 22 of the metal pattern plate 14 are bent at right angles as described with reference to FIG. 1 and as shown in FIGS. 6 and 7. The bent portions of the plurality of terminals 22 are respectively fitted in the recesses 24 formed on the side surface of the coil frame body 10 corresponding to the terminals 22, and the bent portions of the terminals 22 are held by the recesses 24. . The tip of each terminal 22 is connected to a circuit pattern or the like on a circuit board. At this time, the terminals 22 protruding from the auxiliary holding body 36 may be directly connected to a circuit pattern or the like, or the terminals 22 may be cut from the front side of the auxiliary holding body 36 to remove the holding body 36. The terminals 22 protruding from the holder 32 may be directly connected to a circuit pattern or the like. A thin coil is inserted and fixed in each insertion portion 12 of the coil frame body 10, and the winding start and the winding end of each coil are soldered to the connecting pieces 20 and 18 exposed in the insertion portion 12, respectively. Connecting.

According to the embodiment described above, the plurality of terminals 22 led out from the metal pattern plate 14 to the outside of the coil frame body 10 are bent, and this bent portion corresponds to this bent portion. Since each of the terminals 22 is held by the recess 24 formed on the side surface of the frame body 10, the terminal 22 is prevented from being bent even when an external force is applied from the width direction, and each terminal 22 is restricted by the recess 24 in the width direction. Therefore, there is an advantage that each terminal 22 can be easily connected to an external circuit.

FIG. 8 shows an example of a rotary cylinder head using the holding substrate of the thin coil according to the above embodiment. In FIG. 8, the lower fixed drum 42 having a bottomed cylindrical shape integrally has a cylindrical bearing holder portion 46 in the central portion, and two bearings 48 are fitted in the bearing holder portion 46. The rotating shaft 50 is rotatably supported by the rotating shaft 50. The upper rotary drum 44 is fixed to the upper end of the rotary shaft 50 protruding from the upper end of the bearing holder 46. A rotor yoke 52 is fixed to the inner surface of the rotary drum 44 facing the fixed drum 42, and a flat ring-shaped drive magnet 54 is fixed to the rotor yoke 52. A ring-shaped coil fixing member 58 is fixed to the inner bottom of the fixed drum 42, and the thin coil assembly including the coil frame 10 and the coil 40 is fixed on the coil fixing member 58. ing. Below the coil assembly, there is a rotary yoke 56 supported by a rotary cylinder 60 fixed to the rotary drum 44. The rotary yoke 56 and the drive magnet 54 sandwich the coil assembly with an appropriate gap. I'm incorporating it. The terminal 22 is bent at a right angle to the coil assembly and pulled out downward from the bottom of the fixed drum 42. There is. The tips of the terminals 22 are connected to a circuit pattern on the circuit board.

The coil assembly, the drive magnet 54 and the like constitute a flat face-to-face motor, and by controlling the energization of each coil 40 through the terminal 22, the drive magnet 54 and the one integrated with the drive magnet 54 are controlled. The rotary drum 44 is rotationally driven.

In the illustrated embodiment, a plurality of terminals are led out from the metal pattern plate to the outside of the coil frame body, but the number of terminals may be one. Even if it is held by the concave portion formed on the side surface, the desired effect can be obtained.

[0019]

[Effect of device]

 According to the present invention, the plurality of terminals led out from the metal pattern plate to the outside of the coil frame are bent, and the bent portion is held by the recess formed on the side surface of the coil frame corresponding to the bent portion. , The terminal is prevented from bending even if an external force is applied from the width direction, and the terminal is regulated in the width direction by the recesses and aligned, so that the terminal can be easily connected to the external circuit. .

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a holding substrate for a thin coil according to the present invention.

FIG. 2 is a front view showing a metal pattern plate in the example of the same.

FIG. 3 is a rear view showing the middle of the manufacturing process of the holding substrate of the thin coil.

FIG. 4 is a rear view showing the next manufacturing process of the holding substrate of the thin coil.

FIG. 5 is a front view showing a further manufacturing process of the holding substrate of the thin coil.

FIG. 6 is a front view of a holding substrate of the thin coil according to the above-described embodiment.

FIG. 7 is a side view showing an enlarged main part of the holding substrate of the thin coil of the same.

FIG. 8 is a cross-sectional view showing an example of a rotary cylinder head using a holding substrate of a thin coil of the same.

[Explanation of symbols]

 10 Coil Frame 12 Insertion Part 14 Metal Pattern Plate 16 Connection Pattern 22 Terminal 24 Recess

Claims (1)

[Scope of utility model registration request] 1. A holding substrate for a thin coil, wherein a coil frame body made of resin having a plurality of coil-shaped insertion portions and a metal pattern plate formed in a connection pattern shape are integrally molded, the metal pattern comprising: A thin coil including a terminal led out from the plate to the outside of the coil frame body, the terminal being bent, and a recess for holding the bent portion is formed on a side surface of the coil frame body corresponding to the bent portion. Holding board.