JP2517767Y2 - Trance - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a consumer transformer such as a power transformer for audio amplifiers and a transformer for low frequencies.

[0002]

2. Description of the Related Art Conventionally, this type of transformer is shown in FIG.
As shown in, a coil 21 having an iron core 22 incorporated therein is housed in a case 21 having an opening 20, and a synthetic resin 24
After filling the inside with the resin and hardening it, a plate-like lid 25 was fixed to the opening 20 with screws to assemble. In this case, the lid 25 has a single plate shape as shown in FIG. 2B, and the entire surface of the opening 20 of the case 21 is covered with the lid 25.
Was covered by.

[0003]

[Problems to be solved by the invention] Thus, the iron core 22
Since there is a lid 25 made of a metal plate made of a magnetic material above a small gap, when using a device incorporating this transformer, the lid 25 vibrates due to the leakage flux generated from the transformer and the natural vibration of the transformer. However, there was a problem of making noise. However, if the device incorporating this transformer is an audio system such as an audio amplifier, the vibration sound may adversely affect the sound quality. The present invention has been proposed in view of the above, and it is an object of the present invention to provide a transformer which is capable of preventing vibration of the lid and which is extremely suitable for use in an audio amplifier or a low frequency.

[0004]

In the present invention, an assembly 4 of a coil 2 and an iron core 3 is housed from an opening 5 of a case 1,
In addition, it is a gist that the lid 10 is formed in a frame shape having the opening 11 in the transformer in which the lid 10 is attached to the opening 5.

[0005]

As described above, according to the present invention, the lid has the substantially rectangular opening, the lid is frame-shaped, and the opening is positioned with respect to the iron core. It does not work like this, and prevents the generation of the vibration and the characteristic vibration of the transformer. Therefore, even if this transformer is used for an amplifier of an audio system, the sound quality of the audio system is not adversely affected.

[0006]

1 is an exploded perspective view of an embodiment of the present invention. In the figure, reference numeral 1 denotes a case made of a magnetic material having a substantially rectangular tube shape with a bottom, and an assembly 4 having an iron core 3 incorporated in a coil 2 is provided at a predetermined position in the case 1 from an opening 5 of the case 1. Is inserted.

Reference numerals 6 and 7 denote lead wires of primary and secondary windings of the coil 2, and the tip ends of these lead wires 6 and 7 are connectors 8 and 9 for connecting to other devices or electronic circuits. Are provided respectively.

Reference numeral 10 is a lid attached to the opening 5 of the case 1. The lid 10 is made of a frame-shaped metal plate. That is, in the central portion, a substantially rectangular opening 11 is formed.
Are formed, and the frame portion 12 is configured. Then, the frame portion 1 is provided on the inner edge of the frame portion 12 that defines and forms the opening 11.
When the case 2 is attached to the case 1, a bent part 13 extending toward the bottom of the case 1 is formed. In addition, holes 12a to 12d for attachment to other members are formed at four corners of the frame portion 12.

Further, tongue-shaped attachment pieces 14 and 15 extending in the same direction as the bending piece 13 are formed on both sides of the outer edge of the frame portion 12, respectively. 14a and 15a are screw holes formed in the center of them.

Further, a mounting piece 16 having a screw hole 16a is also formed at the center of the outer edge of the frame portion 12. Then, screw holes 14a, 1 are provided on both sides above the side wall on the case 1 side.
Holes 1a and 1b corresponding to 5a are formed, and a hole 1c corresponding to the screw hole 16a is formed in the center above the end wall.

2 (A) and 2 (B) show the rear surface, the same side surface and the same end surface of the lid 10. Holes 12a to 12 in the frame 12
Hexagonal welding nuts 17a to 17d are provided on the rear surface of d, whereby the holes 12a to 12d are screw holes for mounting. Also, the holes 14a to 16 of the respective mounting pieces 14 to 16
The welding nuts 18a to 18c are also provided on the back surface of a,
As a result, the holes 14a to 16a are screw holes.

FIG. 3 shows an assembled state of the transformer of the present invention. In assembling, first, the assembly 4 of the coil 2 and the iron core 3, which is already assembled in a known manner, is housed in a predetermined position in the case 1. The lead wires 6 and 7 are drawn out from the opening 5. Next, the case 1 is filled with a synthetic resin 19 such as an epoxy resin and cured.

Then, the lid 10 is attached to the opening 5.
When mounting, the mounting pieces 14 to 16 are positioned inside the side wall and the end wall of the case 1, the holes 14a to 16a are made to correspond to the holes 1a to 1c on the side of the case 1, and externally tightened (not shown). Then, the lid 10 and the case 1 can be easily and firmly integrated to assemble the transformer.
In this case, the lid 10 is firmly attached to the case 1, and an opening 11 is provided above the iron core 3.
The holes 12a to 12d of the lid 10 are used for attachment to a chassis (not shown).

[0014]

As described above, according to the present invention, the lid 10
And the lid 10 is firmly attached to the case 1. In this case, since the upper part of the iron core 3 is the opening 11, the leakage flux generated from the assembly 4 of the coil 2 and the iron core 3 and the natural vibration of the transformer. Can be suppressed. Therefore, even if this transformer is used for the power supply of the audio amplifier constituting the audio system, the sound quality of the audio system is not adversely affected.

[0015]

[Brief description of drawings]

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

2A to 2C are a rear view, a side view and an end view of a lid used in the present invention.

FIG. 3 is a schematic assembly sectional view of a transformer of the present invention.

FIG. 4A is an explanatory view of an assembled state of a conventional example, and FIG. 4B is a plan view of a lid of the conventional example.

[Explanation of symbols]

 1 Case 2 Coil 3 Iron core 4 Assembly 5 Opening 6,7 Lead wire 8,9 Connector 10 Lid 11 Opening 12 Frame 13 Folding 14-16 Mounting piece 14a-16a Hole 17a-17d Hexagon welding nut 18a- 18c Welding nut 19 Synthetic resin

Claims (1)

(57) [Scope of utility model registration request] 1. A transformer comprising an assembly 5 of a coil 2 and an iron core 3 housed in an opening 5 of a case 1, and a lid 10 attached to the opening 5, wherein the lid 10 has the opening 1
1. A transformer formed in a frame shape having 1.