JPH0624971Y2 - Transformer - Google Patents

Description

[Detailed Description of the Invention] Industrial field of application The present invention relates to a transformer used in various audio equipment, video equipment, industrial equipment, and the like.

2. Description of the Related Art Conventionally, this type of transformer has a structure as shown in FIG. That is, the coil 2 is wound around the coil bobbin 1, the lead wire 3 of the coil 2 is wound around the terminal pin 4 embedded in the coil bobbin 1, and then the coil bobbin 1 is magnetized to form a closed magnetic circuit. The transformer main body incorporating the material 5 is inserted into the insulating case 6, and the bottom plate 7 is incorporated into the opening surface of the insulating case 6. At this time, the bottom plate 7 is moved up to the position of the winding protection convex portion 8 provided on the coil bobbin 1. Once reached, the bottom plate 7 would not lower any further, so that the winding portion could be protected. The winding protection convex portion 8 provided on the coil bobbin 1 is mainly cylindrical as shown in FIG. 5 or wall-shaped as shown in FIG.

However, in such a configuration, in the soldering process for connecting the winding lead wire 3 to the terminal pin 4, the winding protection convex portion 8 is similar to the terminal pin 4 in the soldering process. Since it enters the solder bath, there are problems in quality such as solder or solder scraps attached to the winding protection convex portion 8 to cause a pressure resistance defect and an insulation distance shortage. Further, when the lead wire 3 is wound around the terminal pin 4, the winding protection convex portion 8 provided on the coil bobbin 1 becomes an obstacle and not only hinders automatic winding.
Even in the manual work, the workability was poor, which was a factor that deteriorated the productivity.

Means for Solving the Problems The means of the present invention for solving the above problems eliminates the winding protection protrusion provided on the coil bobbin, and instead provides the winding protection protrusion on the bottom surface of the bottom plate. It is what

Action The action of this means is as follows.

That is, by attaching the winding protection protrusion to the bottom surface of the bottom plate, the coil bobbin does not require the winding protection protrusion, and solder adhesion to the winding protection protrusion is eliminated.
Moreover, automatic winding and distribution can be performed.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1, 2, and 3.

In FIG. 1, 9 is a coil bobbin, and a coil 10 is wound around this coil bobbin 9. The lead wire 11 of the winding wire 10 is wound and connected to the terminal pin 12 that is planted at the lower end of the coil bobbin 9. A magnetic material 13 forming a closed magnetic circuit is inserted into the coil bobbin 1 to form a transformer body, and the transformer body is inserted into an insulating case 14 with the coil bobbin 9 inserted and a bottom plate 15 assembled. The bottom plate 15 has pin holes 16 so that the terminal pins 12 to which the lead wires 11 are connected are exposed to the outside, and the bottom plate 15 is provided on the winding portion of the lead wires 11.
A wrapping protection convex portion 17 is provided so as not to hit. The shape of the winding protection convex portion 17 is the second
The columnar shape shown in the figure and the wall-shaped shape shown in FIG. 3 are considered.

Next, the operation of this embodiment will be described. When the coil bobbin 9 on which the winding 10 is wound and the magnetic material 13 is inserted is inserted into the insulating case 14, and the bottom plate 15 having the winding protection convex portion 17 is mounted thereon, the winding protection convex portion 17 is ,
By the time the bottom plate 15 reaches the position where the lead wire 11 is wound and connected to the terminal pin 12, it hits the coil bobbin 9 and the bottom plate 15 cannot be inserted any further. As a result, the winding connection portion of the lead wire 11 does not hit the bottom plate 15, and disconnection or the like does not occur. Further, the winding protection convex portion 17 is provided on the bottom plate 15 which is the final step of the assembly.
Since it is provided in the coil bobbin 9, it does not hinder the automatic winding of the coil bobbin 9, and there is no solder adhesion to the winding protection convex portion 17 in the soldering process, improving workability and improving quality. Can also be improved.

Effect of the Invention As described above, according to the present invention, by providing the winding protection convex portion on the bottom plate, no solder is attached to the winding protection convex portion, and automatic winding can be performed to improve workability. It is possible to make a low cost and highly reliable transformer.

[Brief description of drawings]

FIG. 1 is a sectional view showing a transformer according to an embodiment of the present invention, and FIGS. 2 and 3 are perspective views of a bottom plate provided with a winding protection convex portion showing an embodiment of the present invention. FIG. 4 is a cross-sectional view showing a conventional transformer, and FIGS. 5 and 6 are perspective views of a main portion showing a conventional winding protection convex portion. 9 ... Coil bobbin, 10 ... Winding wire, 11 ... Lead wire, 12 ... Terminal pin, 13 ... Magnetic material, 14 ... Insulating case, 15 ... Bottom plate, 16 ... Pin hole, 17 ... Winding Convex part for attachment protection.

Claims (1)

[Scope of utility model registration request] 1. A coil bobbin, in which a coil is wound around a magnetic material, is incorporated to form a transformer body, the transformer body is covered with an insulating case having an open bottom, and a coil lead wire is wound around a terminal pin embedded in the coil bobbin. Attach and connect, have a through hole to expose this terminal pin to the outside,
Consists of a winding protection protrusion that comes into contact with the coil bobbin to protect the lead wire wound around the terminal pin, and the bottom plate provided on the inner surface of the case is incorporated into the open surface of the insulating case containing the transformer body. The transformer that did.