JP2518241Y2 - Converter transformer - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application [0001] The present invention relates to a converter transformer used in various video equipment, industrial equipment, and the like.

2. Description of the Related Art In recent years, there is a strong demand for improved productivity and stable quality of converter transformers used in various types of video equipment and industrial equipment. Further, conventionally, this type of transformer has generally been configured as shown in FIGS. 4 and 5. Hereinafter, the configuration will be described with reference to the drawings. As shown in the figure, the magnetic core 1 is incorporated into the coil bobbin 2 in which the winding 3 is turned, and the sheet-shaped non-magnetic metal plate 4 made of copper or aluminum foil is incorporated into the outer periphery of the winding 3 and the coil bobbin 2. The non-magnetic metal plate 4 and the end face 5 at the end of winding are wound around the outer periphery of a part of the magnetic core 1 for one or more turns.
Was fixed with solder 6 to form a ring-shaped short ring 7. In order to position and fix this kind of short ring 7, an adhesive 8 is applied to the inner surface of the non-magnetic metal plate 4, and the adhered portion of the adhesive 8 is applied to the outer periphery of the winding 3 and the magnetic core 1. The outer peripheral portion of the above is closely attached.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In such a conventional converter transformer, the sheet-shaped non-magnetic metal plate 4 is wound one or more times, and the overlapping portion of the end surface 5 of the winding end portion and the end surface 9 of the winding start portion is soldered. Since the short ring 7 is fixed and the short ring 7 is constructed, it is difficult to automate the work of winding the short ring 7 and the fixing work with the solder 6 by a machine, and it takes time because the work is manually performed. However, there was a problem that the cost would increase. Further, since the short ring 7 is positioned and fixed by the adhesive 8 applied to the inner surface of the non-magnetic metal plate 4, variations in the mounting position accuracy of the short ring 7 and peeling of the short ring 7 occur. However, there is a problem that the quality is deteriorated.

The present invention solves the above-mentioned conventional problems by providing a converter transformer capable of automatically and easily mounting a short ring by a machine, stabilizing the mounting position, stabilizing the quality, and reducing the cost. The purpose is to provide.

Means for Solving the Problem In order to solve the problem, the converter transformer of the present invention is configured such that a short ring made of a ring-shaped wire is press-fitted and fixed to a collar of a coil bobbin around which a coil mounted on a closed magnetic circuit core is wound. The short ring fixing portion is provided.

With this configuration, the short ring fixing part that press-fits and fixes the short ring made of a ring-shaped wire into the brim of the coil bobbin in advance requires manual work such as winding the short ring or fixing with solder. It can be fixed in the required position because it becomes insertion work without
The machine makes it possible to work automatically.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

As shown in the figure, the coil bobbin 12 has a flange 14 at the upper end and a terminal block 16 with terminal pins 15 planted at the lower end, and a winding 13 is provided between the flange 14 and the terminal block 16, Through holes 17 are provided at both ends of the portion and the coil bobbin 12 on the pin terminal side. The collar 14 of the coil bobbin 12 is made of a ring-shaped wire and has an upwardly projecting portion 20 at an intermediate portion between two opposite sides.
A concave groove-shaped or grooved short-ring fixing portion 18 for fixing the protruding portion 20 of the provided short ring 19 is provided.

The short ring 19 is made of a non-magnetic metal body in order to reduce the leakage magnetic flux, and is formed by plastic working such as drawing and punching the non-magnetic metal body. EE made of ferrite etc. molded into a shape and size that can be easily fitted
A short ring 19 is attached by inserting only from above so as to wrap a part of the magnetic core 11 of the mold.

Further, the magnetic core 11 has the central leg portion of the coil bobbin 12
It is inserted by being inserted into the through hole 17 from above and below and fixed by a two-liquid adhesive or the like.

With the above configuration, the work of winding the short ring 19 and the work of fixing with the solder are not required, and the machine can be automatically mounted, and the mounting accuracy is improved. As shown in FIGS. 3A to 3C, the short ring fixing portion 18 provided on the collar 14 of the coil bobbin 12 may have various shapes.

Effects of the Invention As is clear from the above embodiments, in the converter transformer of the present invention, the short ring made of the ring-shaped wire is press-fitted and fixed to the collar of the coil bobbin around which the coil mounted on the closed magnetic circuit core is wound. By providing the short ring fixing part, the manual work of winding the short ring and fixing the short ring by solder is not required, and the fixing state is stable, and the reliability, quality, and productivity are improved, and the cost is reduced. It is also possible to realize an excellent converter transformer that can be economical in terms of.

[Brief description of drawings]

FIG. 1 is a perspective view of a converter transformer according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the same, and FIGS. 3 (a) to 3 (c) are collar portions of coil bobbins having other shapes of a short ring fixing portion. FIG. 4 is a perspective view of a conventional converter transformer, and FIG. 5 is an exploded perspective view showing the internal structure thereof. 11 …… magnetic core, 12 …… coil bobbin, 13 …… winding, 14 ……
Tsuba, 15 …… Terminal pin, 16 …… Terminal block, 17 …… Through hole, 18
...... Short ring fixing part, 19 ...... Short ring made of ring-shaped wire.

Claims (1)

(57) [Scope of utility model registration request] 1. A converter transformer having a short ring fixing portion for press-fitting and fixing a short ring made of a ring-shaped wire rod on a collar of a coil bobbin around which a coil mounted on a closed magnetic circuit core is wound.