JPS60200508A - Transformer - Google Patents

Abstract

PURPOSE:To make it feasible to perform automatic wiring of leadwires as well as assembling processes with excellent workability at low cost by a method wherein flanges of bobbins are provided with terminal pin inserting holes, outer leadwire inserting holes and holes communicating with said holes with one another. CONSTITUTION:Flanges of bobbins 1 of windings 2 comprising a transformer are provided with terminal pin inserting holes 11, outer leadwire inserting holes 12 and holes 13 communicating said holes 11, 12 with one another while terminal 9 erected in the holes 11 and outer leadwires 3 inserted into the holes 12 are connected by conductors inserted into the communicating holes 13. The connection between the terminal pins 9 and leadout wires 5 as well as the connection between the outer leadwires 3 and the terminal pins 9 may be automated easily since the outer leadwires 3 are inserted into the holes 12 to be fixed while the outer leadwires 3 are connected to the terminal pins 9 in the specified communicating holes 13. On the other hand, the part numbers to connect the terminal pins 9 to the outer leadwires 3 may be reduced to decrease the numbers of assembling processes cutting down cost.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a small transformer used in various electronic devices, and more particularly to the configuration of a connecting portion between a lead wire and an external lead wire of a small transformer.

Problems with the conventional structure In small transformers used in electronic board devices, etc., a pin terminal structure is used for the lead-out terminal portion in order to automate winding and rationalize wiring. However, although the cost of the transformer itself can be reduced by adopting such a bin terminal structure, when it is incorporated into a device, there is a drawback that the degree of freedom in wiring during assembly is restricted. This pattern will be explained with reference to FIGS. 1 and 2.

Figure 1 shows the winding (2) wound around the bobbin (1) of the transformer.
An insulating plate (41) with an external lead wire (3) attached to the outer periphery of
A winding wire (2+ leader wire (5)) is wound around the core of this external lead wire (3) (5 m) and connected by soldering. Attach tape (61) to insulate the connection, and attach the magnetic core (7) to the bobbin (1).
), and this magnetic core (7) is covered with a mounting bracket (8) to form a transformer.

In a transformer with such a configuration, it is difficult to automate the wiring, and the fixation of the external lead wire (3) relies on insulating tape (61), and when a tensile force is applied from the outside to the external lead wire, the force There is a problem that the leader wire (5) is broken due to the thin wire force. - For this reason, as shown in Fig. 2, ) into the collar of the bobbin (1) into which the terminal pin (9
1, wrap the winding lead wire around this terminal pin (9) and solder it, and attach the terminal pin (9) to the side of this bobbin (1).
A transformer has also been developed in which a printed circuit board 0a connected to 9) is attached, and a core wire (3a) of an external lead wire (3) is connected to this printed circuit board αO.

According to this configuration, the wiring process of the leader wire to the terminal pin (9) can be performed automatically, but since the printed circuit board (l(II) is used, there is a significant disadvantage in terms of price.
Moreover, if an external force is applied to the external lead wire (3), the solder is likely to peel off, and it takes time and effort to connect the external lead wire (3) to the printed circuit board 00, which increases assembly man-hours and improves work efficiency. It is also inferior in terms of

OBJECTS OF THE INVENTION In view of the above-mentioned drawbacks, it is an object of the present invention to provide a transformer that allows automatic wiring of lead wires, is inexpensive, and can be assembled with excellent workability.

Structure of the Invention The present invention provides a hole for inserting a terminal pin, a hole for inserting an external lead wire, and a communication hole for interconnecting these holes in the collar of a bobbin of a transformer. Terminal pins are planted in the holes, connected to the transformer windings wound around the bobbin, external lead wires are inserted into the holes for external lead wire insertion, and these terminal pins and external lead wires are communicated. Electrical connection is made by a conductor inserted into the hole.

DESCRIPTION OF EMBODIMENTS The present invention will now be described in detail with reference to FIGS. FIG. 3 is a perspective view of an embodiment of the transformer of the present invention, FIG. 4 is a perspective view of the main part thereof, and FIG. 5 is a sectional view of the main part. In these figures, with (7) magnetic core, this magnetic core (7)
) is fitted with a bobbin (1) on which a winding (2) is wound. (8) is a mounting bracket.

The winding (2: lead wire (51)
A hole aD into which a terminal pin (9) to be connected to is implanted, and a hole Q21 into which an external lead wire (3) is inserted are provided.

The hole for inserting the external lead wire is provided with a rig that protrudes toward the inside of the hole, as shown in Figure 4, to prevent the external 'J-F wire (3) pushed into the hole from coming out. Good too. These holes (11) and the holes are connected by a communication hole G31 opened to the outside. In this way, the external lead wire (3)
As shown in FIG. 5, by inserting the tip into the hole for pushing the external lead wire, it is fixed by the insulating covering part (3b) and implanted in the bobbin (1), and then implanted in the hole 1111. The connection with the terminal pin (9) is made within the communicating hole.

Connect the terminal pin (91) and external lead wire (3) in the communication hole αa.
) to the core wire (3a), as shown in Figs. 4 and 5, fill the communication hole α31 with paste-like cream solder through its opening, and then heat it to harden it. Alternatively, the terminal pin (9) and the external lead wire (3) may be connected using a conductive material αG as shown in FIG. Further, the positional relationship between the hole 01 for inserting the terminal pin and the hole for inserting the external lead wire may be provided in the vertical direction with respect to the communication hole α3, as shown in FIG. As shown in the figure, they may be arranged side by side in the horizontal direction.

Effects of the Invention As described above, the Kihatsu EA has a hole for inserting a terminal pin, a hole for inserting an external lead wire, and a connection between these two holes in the collar of the bobbin of the winding that constitutes the transformer. A hole is provided, and the terminal pin planted in the terminal pin insertion hole and the external lead wire inserted in the external lead wire insertion hole are connected by a conductor inserted in the communication hole. The external lead wire is inserted into the external lead wire insertion hole and fixed, and since the connection between the external lead wire and the terminal pin is made in a predetermined communication hole, the terminal pin (9: It is easy to automate the connection process of the wire (5) and the connection between the external lead wire (3) and the terminal pin (9), and the number of parts for connecting the terminal pin and external lead wire is small. Therefore, the number of assembly steps is reduced and the cost can be reduced.

[Brief explanation of the drawing]

Figures 1 and 2 are perspective views showing the connection structure of external lead wires in a conventional transformer, Figure 3 is a perspective view of an embodiment of the transformer of the present invention, and Figure 4 is a perspective view of the main parts thereof. , FIG. 5 is a sectional view of the main part, FIG. 6 is a sectional view of the main part of another embodiment of the present invention, and FIGS. 7 and 8 are holes for inserting terminal pins and holes for inserting external lead wires. FIG. 3 is a perspective view showing an example of arrangement of communication holes. (1)...Bobbin, (21...Winding, (3)...
-External lead wire, (5,... leader wire, (7)...
Magnetic core, (8)... Mounting bracket, (9) - One terminal pin, (111 - Hole for inserting one terminal pin, External - Hole for inserting lead wire, α31 - Series through hole, ( ]4
I...cream solder, Q5+...conductive substance. Name of agent: Patent attorney Etsuji Yoshizaki Figure 3 Figure 7 Figure 8

Claims (1)

[Claims] In a transformer consisting of a winding wound around a bobbin and a magnetic core combined with the winding, a hole for inserting a terminal pin and a hole for inserting an external lead wire are connected to the collar of the bobbin, and these two holes are connected. a communication hole into which a conductor can be inserted to electrically connect the terminal pin inserted into the terminal pin insertion hole and the external lead wire inserted into the outer a < IJ- wire insertion hole; A transformer characterized by a jin with a .