JP2000269047A - Coil device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent disconnection of a wire by mechanically absorbing tension acting on a copper wire between a bobbin contact point of the copper wire and a contact point of a winding part of a terminal, on which the end part of the copper wire is wound. SOLUTION: When both end parts 16A, 16B of a copper wire 16 wound on a bobbin 14 are fixed by winding them to terminals 13A, 13B planted on an insulating base 12, buffer materials 15, 15 composed of a thermoplastic resin which is softened at atmosphere temperature higher than that during dip processing are provided along the terminals 13A, 13B, on which the end parts 16A, 16B of the copper wire 16 are wound. In this state, the end parts 16A, 16B of the copper wire 16 are wound along envelope curves of the buffer materials 15 and the terminals 13A, 13B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil device in which a copper wire is wound around a bobbin, and more particularly to a coil device between a contact point of a copper wire bobbin and a winding portion of a terminal to which a terminal of the copper wire is wound. The present invention relates to a coil device provided with a buffer means for absorbing a tension acting on a wire.

[0002]

2. Description of the Related Art FIG.
Shows a conventional coil device 1 of this type, in which a copper wire 3 is wound around a bobbin 2 and both end portions 4 and 4 of the copper wire 3 are
The copper wire 3 is wound around the terminals 6 and 6 provided integrally with the insulating base 5, respectively.
He is nervous without slack between the six. The coil device 1 is integrated by dip while maintaining the state where the terminals 6, 6, and 6 are inserted into the terminal holes (not shown) of the board (not shown) of the electric / electronic component. As described above, since the portion between the bobbin 2 of the copper wire 3 and each of the terminals 6 and 6 is tensioned so as not to be loosened, winding around each terminal may be performed depending on the magnitude of the external force applied during the dip. It may be cut at the part.

Accordingly, there is a technical problem to be solved in order to mechanically absorb the tension acting on the copper wire between the bobbin contact of the copper wire and the winding contact of the terminal from which the terminal of the copper wire is peeled off. The present invention aims to solve the problem.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been proposed to achieve the above-mentioned object, and both ends of a copper wire wound around a bobbin are fixed to a terminal planted on an insulating base. In the coil device, the terminal of the copper wire is placed on the envelope between the buffer and each terminal in a state where a buffer composed of a thermoplastic resin softened at an ambient temperature or more during the dipping process is applied along each terminal. Provide a coil device that winds the part, and in the coil device that winds and fixes both ends of the copper wire wound around the bobbin to the terminal implanted on the insulating base, the ambient temperature at the time of dip processing The present invention provides a coil device in which a buffer member made of a thermoplastic resin softened at step (1) is arranged side by side around each terminal, and ends of the copper wire are wrapped over the envelope between the buffer member and each terminal. Is what you do.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS.

FIG. 1 shows a front view of a coil device 11, and FIG.
2 is an insulator base having a square planar shape, 13A to 13C
Is a terminal, and 14 is a bobbin molded from a thermoplastic resin. The bobbin 14 and the insulator base 12 are covered with a nonmagnetic metal shield case (not shown).
The terminals 13A to 13C are implanted in a radially outer portion of
A cushioning member 15 made of a thermoplastic resin is arranged on the outer peripheral surfaces of the terminals 13A and 13B along the axial direction. Then, as shown in FIGS. 1 to 3, the respective cushioning members 15, 15 are held in contact with the outer peripheral surfaces of the terminals 13A, 13B, and the outer surfaces of the respective cushioning members 15, 15 and the terminals 13A, 13B are connected from the outside. A winding start portion 16A and a winding end portion 16B of the copper wire 16 are wound around the surface along the envelope. At this time, the cushioning materials 15 and 15 are made of a thermoplastic resin such as polymethylpentene, polybutyltephthalate, or polypropylene, which softens to a predetermined hardness at or above the ambient temperature during the dipping process.
Preferably, since it is made of polystyrene, the external force acting on the winding start portion 16A and the winding end portion 16B during the dipping process, and the tension generated by the thermal expansion of the terminal, as shown by the two-dot chain line in FIG. This is absorbed as a bite of the winding start portion 16A and the winding end portion 16B with respect to each of the cushioning members 15, 15. Therefore, even when an external force acts on the winding start portion 16A and the winding end portion 16B of the copper wire 16 during the dipping process, the tension of the winding start portion 16A and the winding end portion 16B does not substantially change, and the copper wire 16 No disconnection occurs.

[0007] Each of the cushioning members 15, 15 is provided with a terminal 13.
In order to improve the attachment of the cushioning materials 15 and 15 to the A and 13B and to improve the workability of the winding start portion 16A and the winding end portion 16B to the cushioning materials 15 and 15,
It may be in the form of a pipe fitted and integrated with the outer peripheral surfaces of the 3A and 13B. As shown in FIG. 4, the material of the cushioning members 15, 15 is fixed, and the winding start portions 16A,
In order to mechanically adjust the biting amount of the winding end portion 16B, the concave portions 18 extending along the axial direction are provided in the cushioning members 15, 15.
May be formed at intervals in the circumferential direction.

FIGS. 5 and 6 show another embodiment of the coil device according to the present invention.
Bar-shaped buffer members 17, 17 are respectively provided around the periphery of 3B and within a range softened by the heat radiation of the terminals 13A, 13B, and are placed on the envelope between the buffer members 17, 17 and the terminals 13A, 13B. Winding start 16A and winding end of copper wire 16, 1
6B. In this case, the cushioning materials 17, 17
Is made of a thermoplastic resin of the same material as that of the cushioning members 15 and 15, and a metal rod (not shown) made of a non-magnetic material is buried in the shaft core portion thereof as a core material.
May be planted in. If so, the terminals 13A, 1
The cushioning members 17 and 17 are held in parallel with 3B, and the buffer function by the biting of the winding start portion 16A and the winding end portion 16B of the copper wire 16 is effectively exhibited.

The present invention can be variously modified without departing from the spirit of the present invention, and it is natural that the present invention extends to the modified ones.

[0010]

According to the first and second aspects of the present invention, as described in the above embodiment, during the dipping process,
The increase in tension due to external force acting on the copper wire between the bobbin contact point and the cushioning point contact point is absorbed by the bite of the copper wire end portion into the buffer material made of thermoplastic resin that softens above the ambient temperature during dipping. With this configuration, the present invention is an invention that has a very great effect, such as preventing disconnection due to handling during dipping.

[Brief description of the drawings]

FIG. 1 is a front view showing a coil device according to an embodiment of the present invention.

FIG. 2 is a partially cutaway bottom view showing the coil device according to one embodiment of the present invention.

FIG. 3 is a detailed enlarged view of a main part of FIG. 2;

FIG. 4 is a view showing one embodiment of a buffer, and FIG.
4A is a top view, and FIG. 4B is a front view.

FIG. 5 is a front view showing another embodiment of the present invention.

FIG. 6 shows another embodiment of the present invention and is a detailed enlarged view of a main part showing a state where a terminal part of a copper wire is tangled.

FIG. 7 is a front view showing a conventional coil device.

[Explanation of symbols]

 12 Insulation base 13A terminal 13B terminal 14 Bobbin 15 Buffer material 16 Copper wire 16A Terminal part (start of winding) 16B Terminal part (end of winding)

Continued on the front page (72) Inventor Kazuhisa Hirose 1049, Oda, Oita, Iizuka-shi, Fukuoka Prefecture Inside Kyushu Mitsumi Co., Ltd. In-house F-term (reference) 5E043 AA02 AB01 EA01 EA06 EB03 EB05

Claims (2)

[Claims] 1. A coil device for fixing both ends of a copper wire wound around a bobbin around a terminal implanted on an insulating base, the buffer being made of a thermoplastic resin which softens at an ambient temperature or more during a dipping process. A coil device in which a copper wire end portion is wrapped on an envelope between the cushioning material and each terminal in a state where a material is placed along each terminal. 2. A coil device for fixing both ends of a copper wire wound around a bobbin around a terminal implanted on an insulating base, the buffer being made of a thermoplastic resin softened at an ambient temperature or more during a dipping process. A coil device in which materials are juxtaposed around each terminal, and a terminal portion of the copper wire is wrapped on an envelope between the cushioning material and each terminal.