JPS625622A - Transformer - Google Patents

Abstract

PURPOSE:To automate the connection of leads with core wirings of external leads and obtain an inexpensive transformer with excellent operating efficiency by inserting terminals for winding and connecting the leads and the core wirings, to the collars of the primary and secondary coil bobbins, and connecting the external leads after assembling and inspecting steps. CONSTITUTION:A connecting terminal 20 is of platelike terminal having projecting pieces 25 for winding leads 18 and connecting by soldering, projecting pieces 28 for winding core wirings 27 of external leads 26 and connecting by soldering, and stationary pieces 20 for press-bonding fixly the films 29 of the leads 26, and inserted by insert molding or by forming T-shaped grooves 31 at the collar, stationary pawls 32 at the terminals, and press-fitting them. Engaging holes 34 and stationary pawls 35 to be enganged with the holes are formed at both sides of a case 33 for insulating and protecting the soldered connections of the leads 18, 23 an the wirings 27 at both sides of the collars 15, 21 having connecting terminals 20 of inner and outer coil bobbins 13, 16. A core 36 and mounting fittings 37 are mounted in the state that the leads 18, 23 are connected with the terminals 20.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to transformers used in various electronic devices.

BACKGROUND ART Conventionally, this type of transformer has been constructed as shown in FIGS. 6 to 9. That is, in FIG. 6, primary coils 3 and 2 are attached to the primary coil bobbin 1 and the secondary coil bobbin 2, respectively.
After winding the secondary coil 4 and installing the primary coil bobbin 1 into the secondary coil bobbin 2, a U-shaped lead terminal plate 7 having a hole 6 on one side for bending and holding the external lead wire 5 is fitted together as shown in FIG. The core wire 8 of the external lead wire 5 and the coil lead wire 9 are connected by soldering as shown in FIG. It had a configuration in which a mounting bracket 12 was incorporated.

Problems to be Solved by the Invention In such a conventional configuration, the leader wire 9 and the external lead wire 5
It is difficult to mechanize the connection of the core wires 8, and the assembly and inspection process after the lead wires 5 are attached reduces work efficiency due to the lead wires 5. Since the square-shaped lead terminal plate 7 is used, there is also a problem in that it is inferior in terms of cost.

The present invention solves these problems, and aims to provide an inexpensive transformer that can automate the connection of the core wires of the leader wire and the external lead wire, has excellent workability, and is inexpensive.

Means for Solving the Problem In order to solve this problem, the present invention provides terminals for winding and connecting the core wires of the leader wire and the external lead wire, respectively embedded in the flanges of the primary and secondary coil bobbins. , the external lead wires can be connected after the assembly and inspection process.

Effect: With the above-described configuration, the present invention automatically winds and solders the lead wires around the terminals using the terminals implanted in the inner and outer coil bobbins, allowing assembly and inspection work to be carried out without external lead wires. This makes it possible to automate the connection of external lead wires to terminals, eliminates the need for lead terminal boards, and reduces costs.

Embodiment FIGS. 1 to 6 are a cross-sectional view and a perspective view of an embodiment of the present invention. In FIG. 2, reference numeral 13 denotes an inner coil bobbin with flanges 14 and 15'i on both sides. It has dimensions that fit into the frame of an outer coil bobbin 160, which will be described later, and one side of the flange 15 has a pull-out groove 19 from which the lead wire 18 of the primary coil 1γ, which is the inner coil, is drawn out. Further, a connecting terminal 20, which will be described later, is planted adjacent to the connecting terminal 20.

Reference numeral 16 denotes an outer coil bobbin, which has flanges 21 on both sides, and a secondary coil 22, which is an outer coil, is attached to one side of one of the flanges 21.
A lead-out groove 24 from which the lead wire 23 is drawn out is provided, and a connection terminal 20 (described later) is planted adjacent to this lead-out groove 24.

The connection terminal 20 has a protruding piece 25 for winding and soldering the lead wire 18. A projecting piece 28 for wrapping and soldering the core wire 27 of the external lead wire 26, and a coating portion 2 of the external lead wire 26.
It is a plate-shaped terminal having a fixing piece 3Q for crimping and fixing the terminal 31. The fixing claws 32 are provided on each terminal, and the terminals can be configured to be connected by press-fitting.

On both sides of the collar 15.21 having the connection terminals 20 of the inner and outer coil bobbins 13.16, there are lead wires 18, 2, which will be described later.
3. Insulation of the solder connection part of the core wire 27.

Mating holes 34 on both sides of the case 330 for protection purposes
A fixed pawl 35 is provided, which engages with each other.

As shown in Figure 2, connect the lead wires 18 and 23 to the connecting terminal 2.
0, the magnetic core 36. After installing the mounting bracket 37 and completing the characteristic test, the external lead wire 26 is crimped and fixed with the fixing piece 30, the core wire 27 is connected to the protruding piece 28, and then the case S3 is fitted to the transformer shown in FIG. can do.

Effects of the Invention As described above, according to the present invention, since plate terminals are used in the transformer, wiring work from the winding to the lead wire can be automated during winding, and assembly and inspection work can be performed in the state of the plate terminal. This improves work efficiency, mechanizes the connection of external lead wires, and eliminates the need for lead terminal boards, which were previously required.
You can get the effect of reducing the number of Kos H people.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of a transformer of the present invention, FIG. 2 is a perspective view of a coil bobbin according to an embodiment of the present invention,
FIG. 3 is a perspective view of a terminal and an insertion groove according to an embodiment of the present invention, FIG. 4 is a perspective view of a transformer according to an embodiment of the present invention, and FIG. 6 is a completed transformer according to an embodiment of the present invention. Figure 6 is a perspective view of the coil bobbin, screws, and lead terminal board of a conventional transformer, Figure 7 is a perspective view of the conventional transformer when assembled, and Figure 8 is a diagram of the completed product of the conventional transformer. The perspective view and FIG. 9 are cross-sectional views of a conventional transformer. 13...Inner I11 coil bobbin, 14...
・Tsuba, 15...Tsuba, 16...Outer coil bobbin, 17...Inner coil, 18...
...Leader line, 19...Leader groove, 2゜...
・Connection terminal, 21...Brim, 22...Outer coil, 23...Leader wire, 24...Leader groove, 25...Protrusion piece , 26...External lead wire, 27...Core wire, 28...Protrusion piece,
29...Coating portion, 30...Fixing piece, 3
1...1-shaped groove, 32...fixing claw, 33
...Case, 34...Mating hole, 35.
... Fixed claw, 36 ... Magnetic core, 37 ...
Mounting hardware. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 3 Figure 5 Figure 6 J Figure 7

Claims (1)

[Claims] An outer coil bobbin with an outer coil wound thereon is placed over the outer periphery of the inner coil bobbin with an inner coil wound around it, and a projecting piece for connecting the winding lead wire, a piece for fixing the insulation coating of the external lead wire and its Attach a plate-shaped punched terminal each having a protrusion that connects the core wire of the external lead wire, apply winding, connect the lead wire from the winding to the connection protrusion, and connect the external lead to this plate-shaped terminal. A transformer in which the core wires of the wires are electrically connected and the lead coating is mechanically pressure-bonded, these connections and pressure-bonded parts are covered with a case made of a molded product, and a magnetic core is assembled in the coil bobbin.