JPH073254U - Thin coil terminal structure - Google Patents

Abstract

(57) [Summary] [Object] To provide a coil terminal structure which does not require a flexible printed circuit board used for connection to an external circuit in a terminal structure of a thin coil formed by winding a conductive ribbon. [Structure] The outer peripheral side coils of the thin coils A _{1 to} A _{4 formed} by winding a conductive thin strip whose one side is insulated are drawn out from the opening of the motor case 10, and the resin sheet material 15 is attached to the tip of the coil. Out of the coil terminals having the copper foil 13 and the insulating coating material 14 on the surface, the coil terminals having the insulating coating material 14 on the surface are folded back at the tip to expose the copper foil, and the portion is reinforced. The material 15 is lined to form a connector portion. [Effect] The coil terminal lined with the insulating sheet material 15 can be used as it is for a flexible printed circuit board.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a thin coil terminal structure, for example, to a thin coil terminal structure suitable for a stepping motor coil.

[0002]

[Prior art]

 Conventionally, as a terminal structure of a coil incorporated in a stepping motor, those shown in FIGS. 6 to 7 are known. 6 to 7, 1 is a motor case, 2 is a rotating shaft that supports a cylindrical magnet, 3 is a coil bobbin assembled in the motor case, and 4 is an enamel copper wire coil wound around the bobbin. The winding start and the winding end are wound around the pins 5 erected at one end of the bobbin 3 and soldered, and the flexible printed circuit board is provided between the pin 5 protruding outside the motor case 1 and the motor drive circuit. 6, the pin 5 is inserted into the hole on the side of the substrate and is connected by soldering.

[0003]

[Problems to be solved by the device]

 In the coil terminal structure with the above configuration, the winding coil terminal on the motor side is soldered to the pin provided on the bobbin, and then the flexible printed circuit board is soldered to the pin to form the terminal. However, it does not stick out of the motor case, which is a major obstacle to downsizing of the motor. In addition, the flexible printed circuit board used for connecting the motor side coil and the motor drive circuit is expensive, which causes a high cost of the motor body.

[0004]

[The purpose of the device]

 The present invention eliminates the need for a flexible printed circuit board, thus eliminating the need to solder the motor coil to the pin or the pin and the flexible printed circuit board. It is intended to provide a terminal structure.

[0005]

[Means for Solving the Problems]

 The gist of the present invention is, in a thin coil terminal structure formed by winding a conductive ribbon, in which the thin coil tip portion is used as a terminal portion and the terminal portion is lined with a resin or the like.

[0006]

[Action]

 According to the above configuration, the structure portion in which the tip end portion of the thin coil formed by winding the conductive ribbon is lined with resin or the like can be used as it is as a flexible printed circuit board.

[0007]

【Example】

1 to 3 show an embodiment of the present invention. In the figure, 10 is a motor case, and the four annular thin coils A ₁ , A ₂ , A ₃ and A ₄ shown in FIG. 3 are mounted in this case while being supported by the bobbin 11. Has been. A rotating shaft 12 supports a magnet (not shown) positioned in the annular thin coil.

The thin coils A _{1 to} A ₄ are thin coils in which a copper foil 13 having a predetermined width is wound together with an insulating coating material 14 and is sliced into "slice coils". The thin coils A ₁ , A ₂ and A ₂ , A ₃ placed in the reverse winding are connected on the inner circumference side (referred to as tandem connection), and the outer coil ends of the thin coils are provided in the motor case 10. It is pulled out from the portion, is lined with an insulating sheet material 15 such as a polyimide resin, and is held in parallel at a predetermined interval. The four coil terminals held by the insulating sheet material 15 are such that the copper foil 13 and the insulating coating material 14 are alternately exposed on the surface by the above-described alternate reverse tandem connection of the annular coil bodies. However, the tip of the coil terminal with the insulating coating material 14 exposed on the surface is folded back and thermocompression-bonded, the copper foil 13 is exposed on the surface, and the tip of the insulating sheet material 15 is filled with epoxy resin containing glass fiber. A reinforcing plate 16 made of resin or the like is lined to serve as a connector portion to an external circuit. An insulating coat is applied to the surface of the copper foil other than the connector.

As described above, a thin coil is used instead of the round winding wire, and the tip portion of this thin coil is used as a terminal portion, and according to the terminal structure in which this terminal portion is lined with resin or the like, solder is used. No connection such as attachment is required, and handling is extremely easy. Further, since the conventional flexible printed circuit board is not required, the motor manufacturing cost can be reduced. Furthermore, since it is not necessary to solder the flexible printed circuit board and the coil, the protruding portion is eliminated, and the ultrathin motor can be configured.

4 and 5 show another example of the coil terminal structure of the present invention. FIG. 4 shows an example of the structure in which the copper foil 13 is exposed on the surface by folding back the coil terminal on the surface of which the insulating coating material 14 is exposed at the tip of the insulating sheet material 15. In Fig. 5, the coil terminals with the insulation coating material 14 on the surface are exposed from the cuts to the back before reaching the tip of the insulation sheet material 15, and then folded back at the tip of the sheet material to expose the copper foil 13 on the surface. It is an example of the structure taken out.

In each of the drawings, the thin coil made of the single-sided insulating coating material is described, but the same effect as described above can be obtained by using the thin coil made of the double-sided coating material.

[0012]

[Effect of device]

 As described above in detail, by applying the present invention, not only the connection such as soldering in the coil terminal structure is unnecessary and the handling is easy, but also the flexible printed circuit board can be omitted, and the motor manufacturing can be performed. The cost can be significantly reduced, and since the flexible printed circuit board and the coil are not required to be soldered, the projecting portion is eliminated and an ultra-thin motor can be configured.

[Brief description of drawings]

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

FIG. 2 is an enlarged cross-sectional view of a coil tip portion.

FIG. 3 is a perspective view showing a connection arrangement of thin coils formed by winding a conductive ribbon.

FIG. 4 is a perspective view of a coil tip portion according to another embodiment of the present invention.

FIG. 5 is a perspective view of a coil tip portion according to another embodiment of the present invention.

FIG. 6 is a perspective view of a conventional motor coil terminal structure.

FIG. 7 is a perspective view of a conventional wound coil portion.

[Explanation of symbols]

First motor case 11 coil support bobbin 12 rotating shaft A ₁ to A ₄ Thin coil 13 copper foil 14 insulating coating material 15 insulating sheet 16 connector reinforcing plate

Continued Front Page (72) Inventor Kiyoshi Wakai 1020 Kiga, Iida City, Nagano Sankyo Seiki Co., Ltd. Iida Factory

Claims (2)

[Scope of utility model registration request] 1. A thin coil terminal structure formed by winding a conductive thin strip, wherein the thin coil tip portion is used as a terminal portion, and the terminal portion is lined with a resin or the like. Terminal structure. 2. A terminal portion is formed by folding back one end portion of a coil in which coil bodies, each of which is formed by winding a conductive ribbon whose one side is insulated, are alternately connected in reverse winding so that the surface becomes a conductive surface. A thin coil terminal structure characterized in that