JPH0716560U - Thin coil terminal structure - Google Patents

Abstract

(57) [Summary] [Object] To provide a coil terminal structure in which a flexible printed circuit board used for connection to an external circuit is unnecessary in a terminal structure of a thin coil formed by winding a conductive ribbon. [Structure] The outer peripheral side coil tips of thin coils A _{1 to} A _{4 formed} by winding a conductive ribbon whose one side is insulated are drawn out from the openings of the motor case 10, respectively, and the coil tips are removed. The positions are shifted and overlapped to integrate. [Effects] According to the above structure, since the terminal portion has a structure in which the tip end portions of the thin coils are overlapped and integrated, the work such as soldering is unnecessary. Further, since a flexible printed circuit board is not required, it is possible to realize a significant cost reduction and a thinner motor.

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. 4 to 5 are known. 4 to 5, 1 is a motor case, 2 is a rotating shaft supporting a cylindrical magnet, 3 is a coil bobbin assembled in the motor case, and 4 is an enamel copper wire coil wound on the bobbin. The winding start and the winding end are wound around the terminal pin 5 erected on one end side of the bobbin 3 and soldered, and between the pin 5 protruding outside the motor case 1 and the motor drive circuit. The structure is such that the flexible printed circuit board 6 is interposed, the pins 5 are inserted into the holes on the circuit board side, and are 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 wound around the pin on the bobbin side and soldered, and then the flexible printed board is soldered to the pin to form the terminal. The pin on the side protrudes from the motor case, which is a major obstacle to downsizing of the motor. Further, the flexible printed circuit board used for connecting the motor side coil and the motor drive circuit is expensive, which causes the cost of the entire motor to be increased.

[0004]

[The purpose of the device]

 The present invention eliminates the need for a flexible printed circuit board, eliminates the need to solder the motor coil to the pin and the pin and the flexible printed circuit board, and achieves ultra-thin motor cost and cost reduction at the same time. It is intended to provide a structure.

[0005]

[Means for Solving the Problems]

 According to the present invention, in a thin coil terminal structure in which a conductive ribbon is wound, each coil tip portion is used as a terminal portion, and each coil tip portion is displaced and overlapped to be fixed. It is a summary.

[0006]

[Action]

 According to the above configuration, the structural portion in which the tip portions of the respective coils are displaced and overlapped with each other can be used as it is as the terminal portion connected to the external circuit.

[0007]

【Example】

1 to 3 show an embodiment of the present invention. In FIGS. 1 to 3, 10 is a motor case, and for this motor case, the four annular thin coils A ₁ , A ₂ and A ₃ shown in FIG. 3 are assembled in a state of being supported by a bobbin 11. Has been. Reference numeral 12 is a rotary shaft that supports a magnet (not shown) positioned inside the thin coil.

The thin coil A₁~ A_FourIs a thin coil 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".₁, A₂, Coil A₃, A_FourAre connected in series on the inner circumference side, and each coil A ₁ ~ A_FourThe outer peripheral side coil tip portions are respectively drawn out from the openings provided in the motor case 10, and the coil tip portions are overlapped at regular intervals, and are superposed and integrated by fixing.

According to the above configuration, the terminal portions obtained by shifting the positions of the tip portions of the respective thin coils and overlapping them can be used as they are for the terminal portions to be connected to the external circuit, so that connection such as soldering is unnecessary. Therefore, the flexible printed circuit board is unnecessary. Moreover, since it is not necessary to connect to the substrate coil, there is no protruding portion, and an ultra-thin motor can be constructed.

In the above-described embodiment, the thin coil is used with insulation coating on only one side, but it may be insulation coated on both sides. Since the coil with a single-sided insulation coating is conductive on the other side, there is no need to remove the insulation coating film. However, in actual use, it is necessary to insulate the coil surface (copper foil side) excluding the terminals. On the other hand, in the case of a double-sided coated coil, it is necessary to remove the coating film from the terminals. Whether it is a single-sided coating or a double-sided coating may be appropriately selected in consideration of the product, work efficiency and the like. In the above embodiment, one pair of cascade-connected coils is used, but the present invention can be applied to a single coil or a combination thereof.

[0011]

[Effect of device]

 As described above in detail, according to the present invention, since the terminal portion has a structure in which the tip end portion of the thin coil is displaced and overlapped and integrated, the work such as soldering is unnecessary, and Easy to handle. In addition, since a flexible printed circuit board is not required, the cost can be reduced significantly. Furthermore, since it is not necessary to connect the flexible printed circuit board and the coil, there is no protruding portion, and an ultrathin motor can be constructed.

[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 side view of a tip overlapping portion of a thin coil.

FIG. 3 is a perspective view showing an arrangement of thin coils.

FIG. 4 is a perspective view of a conventional motor coil terminal structure.

FIG. 5 is a perspective view of a conventional wound coil portion.

[Explanation of symbols]

10 motor case 11 coil support bobbin 12 rotating shaft A ₁ to A ₄ Thin coil 13 copper foil 14 insulating coating material

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiyoshi Wakai 1020 Kiga, Iida City, Nagano Sankyo Seiki Co., Ltd. Iida Factory

Claims (1)

[Scope of utility model registration request] 1. A terminal structure of a thin coil formed by winding a conductive thin strip, wherein each coil tip portion is used as a terminal portion, and each coil tip portion is displaced and overlapped and fixed. The thin coil terminal structure.