JP2518250Y2 - 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.

Conventionally, this type of converter 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, after incorporating the magnetic core 1 into the coil bobbin 2 having the winding 3, the sheet-shaped non-magnetic metal plate 4 made of copper or aluminum foil is attached to the outer periphery of the winding 3 and the coil bobbin 2.
Wound around the outer circumference of a part of the magnetic core 1 incorporated in
The end face 5 of the winding end portion of the non-magnetic metal plate 4 is fixed with the solder 6 to form the 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 an expensive copper plate is used as the non-magnetic metal plate 4, it has been a factor of cost increase. Furthermore, since the positioning and fixing of the short ring 7 are performed 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. There was also a problem that the quality deteriorates.

The present invention solves the above-mentioned conventional problems. The short ring is changed to an inexpensive wire rod and can be automatically attached by a machine, and the attachment position is stable, the quality is stable and the cost is low. An object is to provide a converter transformer capable of performing.

In order to solve this problem, the converter transformer of the present invention has a groove formed in the outer periphery of the collar of a coil bobbin around which a coil mounted on a closed magnetic circuit core is wrapped around the magnetic core. The electric conductor whose both ends are connected is housed in the groove.

Action With this configuration, by winding an inexpensive wire rod in the recess of the collar of the coil bobbin, and by short-circuiting both ends with terminals,
The same effect as the conventional short ring wound with a copper plate can be obtained. Further, there is an advantage that the short ring effect can be changed depending on the number of windings and can be set arbitrarily. Furthermore, automatic winding by a machine and automatic soldering are possible.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 3.

As shown in the figure, the coil bobbin 12 has a terminal block 16 with a collar 14 at the upper end and terminal pins 15 at the lower end, and a winding 13 is provided between the collar 14 and the terminal block 16, Section and the terminal block 16 on the pin terminal side of the coil bobbin 12 have through holes 17 at both ends.
have. The collar 14 of the coil bobbin 12 is provided with a groove 18 around the outer circumference of the magnetic core, and the conductor 19 is wound around the groove 18. Further, it has a structure in which a terminal 20 is planted in a part of the collar 14. As the conductor 19, a copper wire or an aluminum wire having an arbitrary diameter is used, and the number of turns can be arbitrarily changed until the same effect as that of the conventional short ring can be obtained. As the terminal 20, a steel wire or a steel copper wire plated with copper, solder or tin is used. As shown in FIG. 3, both ends of the conductor 19 are wound and connected by soldering, crimping, welding or the like. . The conductor 19 can be formed by the same method as the winding 13 for the coil bobbin 12, and can be formed before the magnetic core 11 is inserted.

With the above configuration, it becomes possible to wind the short ring 19 and fix it with solder from manual work to a machine,
The mounting accuracy is improved.

Effects of the Invention As is clear from the above embodiments, the converter transformer of the present invention uses the expensive copper plate of the related art, which is manually wound and soldered after the magnetic core is inserted. A copper wire or the like can be automatically wound by a machine in the same manner as winding a copper wire around a coil bobbin, and the effect of the short ring can be arbitrarily changed by the number of windings.
Moreover, it is possible to realize an excellent converter transformer in which the fixed state is stable, the reliability, quality, productivity, etc. are improved, and therefore the cost is economical.

[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, FIG. 3 is a front view showing a short ring fixing portion, and FIG. 4 is a perspective view of a conventional converter transformer. FIG. 5 is an exploded perspective view showing the internal structure. 11 …… magnetic core, 12 …… coil bobbin, 13 …… winding, 14 ……
Tsuba, 15 …… Terminal pin, 16 …… Terminal block, 17 …… Through hole, 18
...... Concave groove, 19 ...... conductor, 20 ...... terminal.

Claims (1)

(57) [Scope of utility model registration request] 1. A terminal of a coil bobbin around which a coil mounted on a magnetic core of a closed magnetic circuit is wound, and a groove is formed on the outer periphery of the other flange so as to surround the magnetic core. A converter transformer that houses a conductor whose both ends are electrically connected to.