JPH0617348U - Thin coil holding substrate - Google Patents

Abstract

(57) [Abstract] [Purpose] A thin coil holding substrate formed by integrally molding a coil frame body and a metal pattern plate, which prevents the terminal from bending even when a lateral force is applied, Prevents terminals from becoming misaligned and facilitates external connection. A holding substrate for a thin coil, in which a coil frame body 10 made of resin and having a plurality of coil-shaped insertion portions 12 and a metal pattern plate 14 formed in a connection pattern shape are integrally molded. A plurality of terminals 22 are led out from the metal pattern plate 14 to the outside of the coil frame body 10, and a holding body 32 made of an insulating material for integrally holding the plurality of terminals 22 is provided. The holding body 32 is
It may be integrally molded with a plurality of terminals 22 by resin.

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. 3-33971 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 as 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 pattern of the substrate. Since the connection of each coil is completed simply by connecting to, there is an advantage that the connection of the coil becomes 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. Especially when a thin coil is used for the rotary drive motor of the rotary drum head, the coil holding substrate cannot be directly mounted on the substrate of the tape recorder, the terminal becomes long, and bending and breaking due to the lateral force. There is a problem that it is easy to refuse. Also, not only the coil terminals but also 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 the terminals are required, if the terminals are bent by the lateral force, the terminals become uneven, and the work of connecting with the outside becomes troublesome.

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 and a metal pattern plate, and is a substrate for a terminal drawn from the metal pattern plate. By providing a holding body, it is difficult to bend even if a lateral force is applied to the terminal, and it prevents the terminals from becoming misaligned and makes it easy to connect to the outside. 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. A plurality of terminals led to the outside of the coil frame body was provided, and a holding body made of an insulating material for integrally holding the plurality of terminals was provided. The holder may be made of resin and integrally molded with the plurality of terminals.

[0008]

[Action]

 The plurality of terminals led out of the coil frame body from the metal pattern plate are integrally held by the holding body and aligned. Even if force is applied to the terminals from the lateral direction, the multiple terminals are held together by the holder, making it difficult 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 a holding body 32 made of an insulating material. Each terminal 22 is bent at a right angle downward in the figure 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 this bent portion. Are fitted, and each terminal 22 is held by the corresponding recess 24. The above-mentioned FG coil pattern 28 and 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 are connected to the connection pieces 20 and 18 of the metal pattern plate 14 by soldering or the like, respectively. . 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. You can use the 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. Although any method may be used for manufacturing the metal pattern plate 14, it 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 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 thereof, and the connection pieces 20 and 18 of the metal pattern plate 14 are exposed in each insertion portion 12. . 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 bent portions are held on the side surfaces of the coil frame body 10 where the terminals 22 are exposed so as to correspond to the bent portions of the terminals 22. A concave portion 24 for forming is formed. At the same time when the coil frame body 10 is molded, the holding body 32 that integrally holds the terminals 22 is integrally formed of resin, and if necessary, the reinforcing holding body 36 is integrally formed of resin as shown in FIG. Molded. 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 body 32 and the reinforcing holding body 36. When the coil frame body 10 is integrally insert-molded together with the metal pattern plate 14, the connecting piece for integrally connecting the respective patterns of the metal pattern plate 14 is removed, and the shape of the metal pattern plate 14 is shown in FIG. To the final pattern.

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 reinforcement holder 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 reinforcement holder 36 to remove the reinforcement holder 36 and hold it. The terminals 22 protruding from the body 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. To connect.

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 formed integrally with the plurality of terminals 22 by resin which is an insulator. Since the holders 32 are integrally held, the terminals 22 are prevented from being bent even when an external force is applied in the width direction, and the terminals 22 are aligned in the width direction by the holders 32. The advantage is 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 coil fixing member 58 is fixed to the inner bottom portion of the fixed drum 42. The coil fixing member 58 has a ring shape as shown in FIG. 9, has an appropriate number of screw holes 63, and has a jetty 59 as shown in FIG. 10 over substantially the entire circumference. The coil fixing member 58 is fixed to the inner bottom portion of the fixed drum 42 by screwing the fixing screw 65 penetrating the bottom portion of the fixing drum 42 into the screw hole 63. In the coil fixing member 58, a thin coil assembly including the coil frame 10 and the coil 40 described above is surrounded by the jetty 59, and the end portion of the jetty 59 is located inside as shown in FIG. It is fixed by being bent at an appropriate angle. 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.

Each of the plurality of terminals 22 is bent at a right angle to the coil assembly and drawn downward from the bottom of the fixed drum 42. Here, the holding body 32 is inserted between the cutout portion 64 of the coil fixing member 58 and the inner surface of the peripheral wall of the fixed drum 42 shown in FIG. 9 and into the hole at the bottom of the fixed drum 42, and the terminals 22 are positioned so as not to wobble. In addition, each terminal 22 is insulated from the coil fixing member 58 and the fixed drum 42 by the holding body 22. The tip of each terminal 22 is connected to a circuit pattern on the circuit board.

A flat face-to-face motor is configured by the coil assembly, the drive magnet 54, etc., and by controlling the energization of each coil 40 through each terminal 22, the drive magnet 54 and the one integrated with it. The rotary drum 44 is rotationally driven.

The connection between each terminal 22 and the external circuit may be made by using a connector as shown in FIG. In FIG. 11, a female connector body 67 made of an insulator has a number of female contacts 69 corresponding to the number of terminals 22, and a lead wire 70 electrically connected to each female contact 69 is provided. It is pulled out from the connector body 67 to the outside. By inserting the tips of the terminals 22 protruding from the holder 32 into the receiving holes of the connector body 67, the terminals 22 and the female contacts 69 are electrically connected to each other, and the lead wires 70 are passed through. Can be connected to an external circuit.

In the illustrated embodiment, the plurality of terminals 22 are folded and used, but it is not always necessary to bend and use. Even if it is folded and used, the structure for enabling folding is arbitrary. For example, as shown in FIG. 12, when a plurality of terminals 22 are insert-molded with resin to integrally form the coil frame body 10, the holding body 10a is integrally formed continuously with the coil frame body 10 and the coil frame body 10 is integrally formed. A V-shaped notch 72 may be formed between 10 and the holding body 10a, and the part of the notch 72 may be used as a hinge portion so that the plurality of terminals 22 can be bent at this part.

The holder for holding the plurality of terminals is not limited to the one integrally molded of resin. For example, multiple terminals may be sandwiched from both sides with an adhesive-coated tape to hold them together, or a plate may be applied to one side of the terminals to apply the adhesive. The tape may be adhered to the plate from the other surface side of the plurality of terminals, and the plurality of terminals may be integrally held by the tape and the plate. Furthermore, a holder made of an insulator in which a through hole into which a plurality of terminals should be inserted is formed in advance, and a plurality of terminals may be inserted into the through hole of the holder.

[0023]

[Effect of device]

 According to the present invention, since a plurality of terminals led out from the metal pattern plate to the outside of the coil frame body are integrally held by the holding body made of an insulating material, the terminals are not bent even if an external force is applied in the width direction. In addition, the terminals are regulated and aligned in the width direction by the holding body, so that the terminals 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.

FIG. 9 is a plan view showing a coil fixing member in the cylinder head of the same.

FIG. 10 is an enlarged sectional view of a part of the coil fixing member of the above.

FIG. 11 is a cross-sectional view showing an example of a connection means between a terminal and an external circuit applicable to the present invention.

FIG. 12 is a sectional view showing an example of a terminal bending means applicable to the present invention.

[Explanation of symbols]

 10 Coil Frame 12 Insertion Part 14 Metal Pattern Plate 16 Connection Pattern 22 Terminal 32 Holder

Claims (2)

[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 holding substrate for a thin coil, comprising a plurality of terminals led out from a plate to the outside of the coil frame body, and a holding body made of an insulator for integrally holding the plurality of terminals. 2. The holding substrate for a thin coil according to claim 1, wherein the holding body is made of resin and integrally molded with the plurality of terminals.