JP2002015914A - Coil device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a coil device to be manufactured at a lower cost, improved in joint workability, and prevented from causing a conduction failure during use. SOLUTION: A flange Bb is provided to the ends of a shaft Ba of a bobbin B wound with a wire W respectively, a fixed connector 1 to which the connector P of a lead wire R is connected is provided to the flange Bb, and the part of terminals 1b built in the fixed connector 1 confronting the shaft Bb of the bobbin B are exposed, and the ends of the wires W are connected to the exposed parts of terminals 1b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD [0001] The present invention belongs to the technical field of a coil element incorporated in a solenoid or the like.

[0002]

2. Description of the Related Art Conventionally, as a coil element, for example,
The one shown in FIG. 5 is known.

The conventional coil element C includes a bobbin B and a wire W wound around the bobbin. The bobbin B has a flange Bb formed at an end of a cylindrical shaft Ba on which the wire W is wound to prevent the wound wire W from being broken.

[0004] In this conventional coil element C, an insulating sheet S is provided on the wound surface of a wire W wound around the shaft Ba of the bobbin B.
Is attached, and the outer skin Ra of the lead wire R is placed on the insulating sheet S.
The winding start and end of the wire W are separated from each other and connected by soldering, and the protection tape T is applied to the wound surface of the wire W including the connection portion. Is wound. And the lead wire R is
It is configured to be connected to the main lead wire R 'via the relay connectors N and N'.

[0005]

In the above-mentioned conventional coil element, the number of members for lead (lead wire R, main lead wire R ', relay connector N, N') is increased, so that the manufacturing cost is increased. There is a problem. Further, since the core wire Rb of the lead wire R and the winding start terminal and the winding end terminal of the wire W, which are the connection portions, must be assembled and connected to the unstable winding surface of the wire W having an arcuate surface. There is a problem that workability is poor. Further, when a tensile force is applied to the lead wire R and the main lead wire R 'during use, there is a problem that the connection portion may swing to cause poor conduction or the like.

The present invention has been made in view of the above problems, and has a low manufacturing cost, good workability in connecting a connection portion, and a problem that conduction failure occurs during use. It is an object to provide a coil element that does not have a coil element.

[0007]

Means for Solving the Problems To solve the above-mentioned problems, a coil element according to the present invention employs the following means.

That is, in the first aspect, a fixed connector for connecting a lead wire connector is provided on a flange formed at an end of a shaft portion around which a wire of a bobbin is wound, and a terminal built in the fixed connector is provided. A wire is connected by exposing a part to the shaft of the bobbin.

In this means, the number of members is reduced only by providing the fixed connector on the bobbin, so that the manufacturing cost is reduced. In addition, since it is only necessary to connect the wire to the terminal exposed from the fixed connector, the workability of the connection of the connection portion is improved. In addition, since the connector of the lead wire is connected to the fixed connector and no tensile force is applied to the connection portion, conduction failure does not occur during use.

According to a second aspect of the present invention, in the coil element of the first aspect, the terminal is press-fitted and fixed to a casing of the fixed connector from a shaft portion side of the bobbin.

According to this means, the fixed connector is assembled by press-fitting the terminal into the casing.

According to a third aspect of the present invention, in the coil element according to the first or second aspect, the flange of the bobbin is provided with a protruding portion on which an intermediate portion of a wire to be wired toward the terminal is hooked. I do.

In this means, the wire pulled out from the shaft of the bobbin is hooked on the projection and then connected to the terminal.

According to a fourth aspect of the present invention, in the coil element according to any one of the first to third aspects, the flange of the bobbin is provided with a tapered portion for expanding a gap between the terminal and the terminal toward the exposed end of the terminal. It is characterized by being.

According to this means, a space is secured around the terminal for connecting the wire.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a coil element according to the present invention will be described with reference to FIGS.

In this embodiment, as shown in FIGS. 1 and 2, a fixed connector 1 extending substantially in the axial direction opposite to a shaft portion Ba on a flange Bb of a bobbin B constituting a coil element C.
It has.

The fixed connector 1 is formed integrally with the bobbin B from a synthetic resin material.
And a casing 1a formed of a female block body opened in a U-shape to the opposite side, and two terminals 1b built in the casing 1a. A casing Pa composed of a male block body of a connector P connected to the lead wire R is fitted and connected to the casing 1a. To the terminal 1b, a terminal receiver Pb built in the casing Pa of the connector P of the lead wire R is inserted and connected. The terminal 1b is provided with a press-fitting portion 1b 'and a retaining portion 1b "which are formed by bending a conductive round bar-shaped metal wire into an L-shape and pressing and deforming it into one piece.
Press-fit portion 1 is attached to mounting hole 1a 'penetrated through casing 1a.
b ', the piece provided with the retaining portion 1b "is press-fitted and fixed from the shaft portion Ba side of the bobbin B, and the other piece is exposed from the casing 1a and extends outward substantially parallel to the flange Bb of the bobbin B (FIG. 4). Therefore, the fixed connector 1 is easily assembled by press-fitting and fixing the terminal 1b to the casing 1a.

With the configuration of the fixed connector 1, the flange Bb of the bobbin B is improved.

In the vicinity of the fixed connector 1 on the peripheral surface of the flange Bb of the bobbin B, the winding start terminal and the winding end terminal of the wire W are connected to the terminal 1b of the fixed connector 1 from the shaft Ba of the bobbin B. Protrusions 2 and 3 for hooking the middle part are provided so as to face each other. Further, on the edge end surface of the flange Bb of the bobbin B, a wiring relief groove 4 for wiring the winding start terminal from the one protrusion 2 to the shaft Ba so as not to break the winding of the wire W is formed. I have. In addition, a tapered portion 5 is provided near the fixed connector 1 on the edge of the flange Bb of the bobbin B so as to increase the gap between the fixed connector 1 and the terminal 1b toward the protruding tip of the terminal 1b.

According to this embodiment, the fixed connector 1
Of the wire W is wound around the exposed portion of the terminal 1b, and the wire W is welded and fixed at the projecting end of the terminal 1b by micro-arc welding. The heat of this welding does not reach the wire W wound around the shaft Ba of the bobbin B. The protrusions 2 and 3 provided on the flange Bb of the bobbin B prevent the wire W from being loosened and unwound around the shaft Ba of the bobbin B, and also prevent the wire W from being wrapped around the terminal 1b. Workability of Further, the tapered portion 5 provided on the flange Bb of the bobbin B is provided with the terminal 1 of the fixed connector 1 of the wire W.
b. It facilitates the work of lashing and welding.

Therefore, the casing 1a of the fixed connector 1
It is only necessary to connect the winding start terminal and the winding end terminal of the wire W to the terminal 1b which is supported and exposed in a stable posture, so that the workability of the connection of the connection portion is improved.

When the fixed connector 1 is connected to the connector P of the lead wire R, the connection of the lead is completed.

Therefore, the number of members is reduced as compared with the above-described conventional example only by providing the fixed connector 1 on the bobbin B. As a result, manufacturing costs are reduced.

The tensile force applied to the lead wire R is received by the fixed connector 1 and the connector P connected by mechanical engagement.

Accordingly, no tensile force is applied to the connection between the terminal 1b of the fixed connector 1 and the winding start and end terminals of the wire W, so that poor conduction does not occur during use.

As described above, besides the illustrated embodiment, the winding start terminal and the winding end terminal of the wire W wound on the terminal 1b of the fixed connector 1 can be fixed by other means such as soldering.

Further, it is also possible to select a conductive rectangular metal wire as a material of the terminal 1b of the fixed connector 1.

[0029]

As described above, in the coil element according to the present invention, the number of members is reduced only by providing the fixed connector on the bobbin, so that the production cost is reduced.

Further, since the wire can be connected to the exposed terminal in a stable posture supported by the fixed connector,
The workability of the connection at the connection portion is improved.

Further, since the connector of the lead wire is connected to the fixed connector, and no tensile force is applied to the connecting portion of the terminal and the wire, there is an effect that the conduction failure does not occur during use.

Further, since the connecting portion of the terminal and the wire is separated from the wire wound on the bobbin, there is an effect that it is possible to employ a fixing means involving high heat other than soldering for connection.

Further, as the second aspect, since the fixed connector is assembled by press-fitting and fixing the terminal to the casing, there is an effect that the assembling work of the fixed connector becomes easy.

Further, the wire drawn from the bobbin shaft is hooked on the projection and then connected to the terminal, so that the connected wire is loosened and wound around the bobbin shaft. This has the effect of preventing melting.

Further, as a fourth aspect, a space is secured around the terminals for the operation of connecting the wires, so that the operation of connecting the wires to the terminals is facilitated.

[Brief description of the drawings]

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

FIG. 2 is a side view of FIG.

FIG. 3 is a sectional view taken along line XX of FIG. 1;

FIG. 4 is an enlarged view showing an example of assembling main parts of FIG. 1;

FIG. 5 is a front view showing a conventional example.

[Explanation of symbols]

 Reference Signs List 1 fixed connector 2, 3 protrusion 4 taper B bobbin Ba shaft Bb flange P connector R lead wire W wire

Claims (4)

[Claims] A fixed connector for connecting a lead wire connector is provided on a flange formed at an end of a shaft portion around which a bobbin wire is wound, and a part of a terminal built in the fixed connector is partially connected to the bobbin. A coil element formed by connecting a wire exposed on the shaft side. 2. The coil element according to claim 1, wherein the terminal is press-fitted and fixed to a casing of the fixed connector from a shaft portion side of the bobbin. 3. The coil element according to claim 1, wherein the flange of the bobbin is provided with a projection on which an intermediate portion of a wire wired toward the terminal is hooked. 4. The coil element according to claim 1, wherein the flange of the bobbin is provided with a tapered portion that enlarges a gap between the terminal and the terminal toward the exposed end of the terminal. Coil element.