JPH0927425A - Toroidal transformer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve reliability of connection between an extraction lead of a coil and a lead and permit automatic connection operation. SOLUTION: A resin spacer implanted with lapping terminals 3 which function as terminal stands is provided on the top surface of a toroid core 1 and a magnet wire is wound for forming a coil on an assembled body thereof. An extraction lead of a coil is tucked up to the lapping terminal 3 and a lead is also tucked up and connected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toroidal transformer used in a power supply section for audio equipment.

[0002]

2. Description of the Related Art Conventionally, this type of toroidal transformer is
As shown in FIG. 4, a magnet wire is wound around a ring-shaped toroid core to form a coil 5 ', and a lead wire 6'at the winding start or end of the coil 5'is connected to a lead wire 10'. It is composed.

In this case, the insulation tube 7'is attached to the lead wire 6 '.
And a lead wire 6'is entwined with the core wire of the lead wire 10 'and connected by soldering. .

[0004]

As described above, since the work is conventionally performed manually, there are variations, and depending on the work method, the wires may cause a short circuit, or there is a risk of disconnection, and insulation is required. There is a problem that it may be damaged and lack reliability.

Further, when the lead wire 10 'is pulled, stress is applied to the lead wire 6'because connection is made at the insulated wire A'where the attachment is unstable, leading to disconnection of the coil 5'. There was a fear.

The present invention has been proposed in view of the above, and an object thereof is to provide a toroidal transformer capable of improving the reliability of connection of a lead wire or a lead wire and automating the connection work. Especially.

[0007]

According to the present invention, an insulating resin spacer, in which a plurality of lapping terminals 3 are implanted, is provided on one surface of a toroid core 1, and the spacer is wound around them. The lead wire of the coil 5 is entwined with the predetermined lapping terminal 3 and the lead wire 10 is also entangled and connected to achieve the above object.

[0008]

1 to 3 show one embodiment of the present invention, in which FIG. 1 is an exploded perspective view of a round spacer with a terminal, a toroid core and a round spacer without a terminal according to the present invention.

That is, reference numeral 1 in the drawing denotes a ring-shaped toroid core which is formed by winding a silicon steel plate in a ring shape. Two
Is a round spacer with a terminal that functions as a terminal block, the upper surface of which has a curved arc shape and the lower surface of which is a flat portion 2a, and is brought into contact with the upper surface 1a of the toroid core 1.

The round spacer 2 with terminals is made of, for example, glass fiber reinforced polyethylene terephthalate resin (PE
T) and polybutylene terephthalate resin (PBT) are formed by molding a resin having an insulating property. that time,
At a predetermined position on the upper surface, root portions of a plurality of lapping terminals 3 having a rectangular cross section are planted.

The reason why the rectangular wrapping terminal 3 is used as the terminal is that the lead wire made of the magnet wire and the core wire of the lead wire can be easily and surely entangled by automation or the like. In addition, a resin support terminal 2b in the form of a short cylinder is provided integrally with the spacer at the wrapping terminal installation portion on the upper surface of the round spacer 2 with terminals. This is to firmly support the wrapping terminal 3 and to insulate the coil wound around the surface of the round spacer 2 with terminal from the wrapping terminal 3.

However, as described above, the flat portion 2a on the lower surface of the round spacer 2 with terminals is the upper surface 1 of the toroid core 1.
a is contacted. Further, a flat portion 4a of a resin-made round spacer 4 whose lower surface is formed in an arc shape like the round spacer 2 with terminals is brought into contact with the lower surface of the toroid core 1, and the toroidal transformer is attached to the outer surface of the assembly. 2, a coil wire is formed to form a coil 5, and a predetermined lead wire 6 is covered with an insulating tube 7 and entangled with a predetermined lapping terminal 3. In addition, an insulating paper 8 is provided on the outer surface of the coil 5.
Is wound to form a toroidal transformer 9. In the figure, 10 is a lead wire.

FIG. 3 is a schematic vertical sectional view of the toroidal transformer 9 in the portion where the lapping terminal 3 is implanted. Round spacers 2 with terminals and round spacers 4 are provided above and below the toroid core 1, and insulating paper 8a is provided on the surface thereof.
Is wound, and the primary side coil 5a is formed on the surface thereof. Then, the insulating paper 8b is wound around the surface, the secondary side coil 5b is formed on the surface, the insulating paper 8 is wound around the outer surface of the coil 5 thus formed, and each coil is wound. Predetermined lead wires 6 of 5a and 5b are entwined with a predetermined lapping terminal 3. This work is automated.

Therefore, as shown in FIG.
The toroidal transformer 9 can be completed by tying the core wire of the lead wire 10 to the wrapping terminal 3 to which the wire is entangled, and connecting by soldering.

In the assembly process, the toroid core 1
Since the upper and lower parts of the are curved, when wound with a strong tension of the magnet wire, the outer shape is rounded, so that the round shape with the terminal round spacer 2 and the lower round spacer 4 follow the curved shape. Since the magnet wire is closely attached and easy to be wound, and so-called wire floating is prevented to eliminate a gap between the magnet wire and the toroid core 1, vibration of the coil 5 can be suppressed, and when used as an acoustic power transformer, it can be driven. Noise generation due to coil vibration can be prevented.

[0016]

As described above, according to the present invention, the lead wire of the coil 5 is entangled with the terminal planted in the resin spacer having an insulating property provided on the upper surface 1a of the toroid core 1. Since this terminal is the rectangular wrapping terminal 3, the binding operation can be performed easily and surely, and it is suitable for automation, so that there is no variation in the binding operation and the reliability is high. Is improved.

Further, since the lead wire 10 is also electrically connected to the lead wire 6 of the coil 5 entwined with the wrapping terminal 3, the wrapping terminal 3 is firmly planted even if the lead wire 10 is pulled. Therefore, the lead wire 6 of the coil 5 is not stressed by the pulling of the lead wire 10, and there is no risk of disconnection.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a main part of an embodiment of the present invention.

FIG. 2 is a partial perspective view of a toroidal transformer according to an embodiment of the present invention.

FIG. 3 is a vertical sectional view of a lapping terminal portion of a toroidal transformer according to an embodiment of the present invention.

FIG. 4 is a partial perspective view of a conventional toroidal transformer.

[Explanation of symbols]

 1 Toroid core 1a Top surface 2 Round spacer with terminal 2a Flat part 2b Terminal support part 3 Lapping terminal 4 Round spacer 5, 5a, 5b Coil 6 Lead wire 7 Insulation tube 8, 8a, 8b Insulation paper 9 Toroidal transformer 10 Lead wire

Claims (1)

[Claims] 1. A coil (5) formed by providing an insulating resin spacer having a plurality of wrapping terminals (3) implanted on one surface of a toroid core (1) and winding the spacers around them. The toroidal transformer characterized in that the lead wire (10) is entwined with the predetermined wrapping terminal (3) and the lead wire (10) is also entangled and connected.