JPH06283321A - Coil - Google Patents

Abstract

PURPOSE:To obtain a coil which can prevent the discontinuity of its winding section and has a stable electrical performance and, at the same time, to increase the mechanical strength of connecting lines led out from the winding starting and winding terminating ends of the coil by preventing the winding of the connecting lines around a bobbin. CONSTITUTION:Connecting lines are formed by forming projections 3 and 3' for locking on the peripheral surface of a base 2 and locking the folded ends of the winding L at both ends of the winding L led out from the winding section 6 of a bobbin 1 to the projections 3 and 3'.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil, and more particularly to a method of forming a connecting wire connecting a winding portion of a winding and an electrode terminal.

[0002]

2. Description of the Related Art Conventionally, in order to increase the mechanical strength of the connecting wire when winding a winding around a bobbin or core winding and connecting both ends of the winding to the electrode terminals. It has been practiced to fold the wire material of the portion to be the connection line or to fold and twist the wire material to increase the wire diameter of the same portion for reinforcement. Here, the manufacturing process of the conventional coil in which the connecting wire is formed by folding back the wire rods at both ends of the winding wire will be described with reference to FIGS. In FIG. 4, 1
1 is a winding frame attached to the base 25, 14 and 14 'are electrode terminals implanted in the base 25, and L is a winding wound around the winding frame 11. With this configuration, first, as shown in FIG. 4A, one end of the winding L is temporarily fixed to the hooking pin 24, and the intermediate portion is reciprocated between the two hooking pins 20 and 21 and folded back. Winding side connecting wire 1
After forming 5, the connection wire 15 is wrapped around the electrode terminal 14 as shown in FIG.
The hooking pins 22 and 23 are reciprocated and folded back, and the same portion is twisted to form the winding end side connecting wire 17.
Then, as shown in FIG. 3C, the connecting wire 17 is connected to the electrode terminal 1
After entwining with 4 ', soldering process is completed. A development view of the winding in the above process is shown in FIG. In FIG. 5, section A
Is the connecting wire 15 on the winding start side, and section B is the winding part 16 of the winding frame 11.
The winding part, section D, is the winding end side connecting wire 17
Respectively correspond to. Here, the section B which is the winding portion is composed of a single wire section b, an extension section a2 of the connection line A on the winding start side and an extension section d2 of the connection line D on the winding end side. Therefore, when forming the connection line A on the winding start side and the connection line D on the winding end side, the sections a1 connected to the electrode terminals are formed.
The extension sections a2 and d2, which are continuously wound on the winding portion 16 of the winding frame 11 after d1, must be lengthened in consideration of the extension sections a2 and d2. In this way, since the extension sections a2 and d2 of the connecting wires 15 and 17 having different wire diameters are wound around the winding portion 16 of the winding frame 11, winding disorder is likely to occur in the winding portion, and further, the coil electric However, there is a drawback that the dynamic performance is lowered, the inductance value is varied, and the Q of the coil is lowered. In addition, as described above, since the winding portions 16 are wound with portions having different wire diameters, during the winding work, due to the difference in pulling force between the extension sections a2 and d2 of the connecting wires 15 and 17 and the single wire section b. , There is also a possibility of disconnection.

[0003]

It is an object of the present invention to prevent the winding start side connecting wire and winding end side connecting wire formed by folding or twisting from being wound around the winding portion of the winding frame. It is an object of the present invention to eliminate the above-mentioned drawbacks, obtain a coil having stable electric performance, and enhance the mechanical strength of the connecting wire.

[0004]

[Means for solving the problem] A base having electrode terminals implanted therein,
A coil having a winding frame formed by winding a winding, and folding the ends of the winding drawn from the winding portion of the winding frame, or a coil provided with a connection wire formed by twisting the winding after winding the winding. A locking projection is formed on the locking wire, and the folded-back end of each connection line is locked to the locking projection so that the folded-back portion of each connection line is not caught in the winding frame.

[0005]

[Embodiment 1] FIG. 1 is a perspective view showing one embodiment of a coil according to the present invention, FIGS. 2 (a) to 2 (d) are explanatory views of a manufacturing process of the coil, and FIG. 3 is used for the coil. It is a development view of a wire rod. Hereinafter, this embodiment will be described with reference to FIGS. A winding frame 1 around which a winding L is wound is mounted and fixed on the upper surface of a base 2 formed of synthetic resin. 3, 3 ′ are locking projections provided at appropriate places on the peripheral surface of the base 2, 4,
4'is an electrode terminal implanted in the base 2, 5 is a winding start side connecting wire of the winding L, 6 is a winding portion wound around the winding frame 1, 7 is a winding end side connecting wire of the winding L Then, one end of each of the winding start side connecting wire 5 and the winding end side connecting wire 7 is respectively connected to the electrode terminal 4,
4'is entwined and connected, and the other ends thereof are locked to the locking projections 3 and 3 ', respectively. The manufacturing process of the coil of the above embodiment will be described with reference to FIGS. 2 and 3. First, in order to form the winding start side connecting wire 5, as shown in FIG. 2A, the tip of the winding L is temporarily fixed, The midway portion is locked to the locking projection 3 of the base 2, folded back in the section E, and the folded back portion is twisted. Next, FIG. 2 (b)
As described above, the temporary fixing portion of the winding L is separated and the section E is entwined with the electrode terminal 4 to be connected. Next, as shown in FIG.
After winding the single wire section F of the winding L around the winding portion 6 of the winding frame 1 a predetermined number of times, the middle portion of the winding L derived from the winding portion 6 is locked to the locking projection 3 ′. And turns back in the section G and twists the same portion to form the winding end side connecting wire 7. Finally, as shown in FIG. 2 (d), the winding tip is cut off and the section G is connected to the electrode terminal 4'to complete.

[0006]

According to the present invention, when the winding start side connecting wire and the winding end side connecting wire are formed, the folded end of each connecting wire is locked to the locking projection provided on the base.
Since each of the connecting wires is prevented from being wound into the winding portion of the winding frame, winding disorder is not generated during winding work, and the pulling force of the winding wound around the winding portion of the winding frame is connected. Since it can be kept constant without being affected by the tensile force of the wire, disconnection can be prevented and a coil with stable electrical performance can be obtained.

[0007]

[Brief description of drawings]

1 is a perspective view showing an embodiment of a coil according to the present invention,
2A to 2D are explanatory views showing the manufacturing process of the coil, and FIG. 3 is a development view of a wire used in the coil.
4A to 4D are explanatory views showing the manufacturing process of the conventional coil, and FIG. 5 is a development view of the wire rod used in the conventional coil.

[0008]

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Winding frame 2 ... Base 3,3 '... Locking protrusion 4,4' ... Electrode terminal 5 ... Winding start side connection wire 6 ... Winding part 7 ...・ Winding end side connection wire L ・ ・ ・ Winding

Claims (1)

[Claims] 1. A winding frame around which a winding is wound is mounted and fixed on a base having electrode terminals implanted therein, and both ends of the winding are folded back, or
A coil formed by connecting one end of each of a winding start side connecting wire and a winding end side connecting wire formed by folding after being folded back to the electrode terminal, and providing a locking projection on the peripheral surface of the base, A coil, wherein the other folded back end of the coil is locked to the locking projection.