JPH06105658B2 - Trance - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transformer used in various electronic devices.

2. Description of the Related Art Conventionally, this type of transformer has a structure as shown in FIGS. That is, in FIG. 5, the primary coil 2 is wound around the primary coil bobbin 1, the lead wires 3 and 4 are wound around the terminal 6 through the lead groove 5 and soldered, and the secondary coil 7 is wound around The structure was such that it was built in the next coil bobbin 8 and further the magnetic core 9 was built in.

Problems to be Solved by the Invention In such a conventional structure, as shown in FIG. 7, the insulation distances a and b between the lead wires 3 and 4 wound around the terminals 6 and soldered are
Instable due to factors such as the diameter of the lead wires 3, 4 or the winding of multiple lead wires, the state of soldering, etc., the terminal pitch A, the diameter of the terminals 6, the diameter of the lead wires 3, 4, the number of soldering The condition is limited,
Therefore, there is a problem that work efficiency is lowered and quality is inferior.

The present invention solves such a problem, and secures an insulation distance between the portions where the lead wires are wound and soldered, the soldering state is less restricted, the workability is excellent, and the pin pitch is shortened to reduce the size. It is an object of the present invention to provide a low-cost, high-quality transformer that is capable of being manufactured, and is not restricted by the diameter of terminals, the diameter of lead wires, the number of wires, and the like.

Means for Solving the Problems In order to solve this problem, the present invention has a structure in which an insulating case having a projecting piece for insulating between the parts of the lead wire wound and soldered is attached to the coil bobbin. .

Effect The present invention ensures the insulation distance by the above-described insulating case, has less restrictions on the soldering state, has good workability, and can be downsized, and has restrictions on the diameter of terminals, the diameter of lead wires, the number of wires, etc. In addition, it is inexpensive and enables high quality.

Embodiment FIG. 1 to FIG. 4 are a sectional view and a perspective view of an embodiment of the present invention. In FIG. 2, 10 is a primary coil bobbin as an inner bobbin, which has collars 23 and 24 on both sides, and a collar. 23 has a lead-out groove 14 and a terminal 22 is implanted,
Lead wires 12, 13 from the next coil 11 are wound around the lead terminal 22 from the lead groove 14 and soldered.

Further, on both side surfaces of the collar 23, fixing holes 20 of an insulating case 18 described later
There are several fixed claws 15 that fit with the primary coil bobbin 10. The primary coil bobbin 10 is incorporated in a secondary coil bobbin 16 as an outer bobbin around which a secondary coil 17 as an outer coil is wound.

Reference numeral 18 in FIG. 3 is an insulating case having several protrusions 19 inside, and has several holes 21 for letting out terminals 22 on the upper surface and a primary coil bobbin on the side surface.
A plurality of fixing holes 20 for fitting with the fixing claws 15 provided on the side surface of the collar 23 of 10 are provided and mounted as shown in FIG.
Between the lead-out terminal 22 and the soldered part 25
19 is inserted to insulate the soldered portions 25.
A secondary coil bobbin incorporating the primary coil bobbin 10
A magnetic core 23 is incorporated in 16 to form a transformer.

It is also possible to provide the secondary coil bobbin 16 with the fixing claw 15 and attach the insulating case 18 to the terminal portion.
The holes may be grooves.

As described above, according to the present invention, by using the insulating case having the projecting piece inside, the projecting piece is inserted between the soldering portions connecting the lead wire and the terminal, and the insulation distance is secured, and the soldering is performed. There is less restriction on the attached state, workability is good, the terminal pitch can be made small, downsizing is possible, and there are no restrictions on the diameter of the terminal, the diameter of the lead wire, the number of wires, etc. The effect that it can be provided is obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the transformer of the present invention, FIGS. 2 and 3 are perspective views of the coil bobbin, and FIG. 4 is a sectional view according to an embodiment of the transformer of the present invention. Is a perspective view of a coil bobbin of a conventional transformer, FIG. 6 is a perspective view of a finished product of the conventional transformer, and FIG. 7 is an explanatory diagram showing a portion of the conventional transformer. 10 …… Primary coil bobbin, 11 …… Primary coil, 12,13…
… Lead wire, 14 …… Lead groove, 15 …… Fixed claw, 16 …… Secondary coil bobbin, 17 …… Secondary coil, 18 …… Insulation case, 19
…… Projection piece, 20 …… Fixed hole, 21 …… Hole, 22 …… Terminal, 23,2
4 …… Tsuba, 25 …… Soldering part.

Claims (1)

[Claims] Claims: 1. A collar is provided at both ends of an inner bobbin wound with an inner coil, and a pullout groove for a lead wire and a terminal are planted in one of the collars, and fixing claws for fixing an insulating case to the side surface of the collar are provided. From a molded product that has a projecting piece that enters between the soldering parts that connect the lead wire and the terminal to the inside, and a fixing hole that fits the fixing claw and a hole or groove through which the terminal passes, on the side A transformer in which the above inner bobbin is installed in a center hole of an outer bobbin wound with an outer coil, and a magnetic core is installed therein.