JP2794845B2 - Power transformer mounting device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power transformer mounting device used for electric equipment and the like.

2. Description of the Related Art Conventionally, in order to ground a circuit of a power transformer when mounting it on a metal fitting for fixing the power transformer, a terminal of a grounding pole of the power transformer is passed through a hole provided on a printed circuit board, and is electrically connected by soldering or the like. This is done by providing additional holes in the circuit pattern to be connected to the holes on the printed circuit board, and by tightening the other end of the lead wire fixed by soldering or the like with a screw for mounting a power transformer. Was.

Hereinafter, the above-described structure will be described with reference to the drawings.

FIG. 2 shows a bracket structure to which a conventional power transformer is attached, wherein 1 is a power transformer, 2 is a printed circuit board,
Reference numeral 3 denotes a ground lead wire, and reference numeral 4 denotes a bracket for mounting a power transformer. FIG. 3 is an exploded perspective view showing a state before the components shown in FIG.

In the conventional example configured as described above, the number of terminals 1a and the number of terminals 1b of the ground electrode corresponding to the number of circuits provided in the power transformer 1 are equal to the number of the terminals 1a and the number of terminals 1b of the ground electrode formed on the printed circuit board 2. And is electrically connected by soldering or the like.

On the other hand, the circuit of the terminal 1b of the ground electrode has a structure in which a hole 2b is provided at an arbitrary position formed as a common circuit by a pattern land on the printed board 2, and the lead wire 3 is passed through.

Here, the lead wire 3 is co-tightened via a screw 5 which is fastened to a metal fitting 4 for fixing the power transformer 1 or is fastened to another part of the metal fitting 4 via a screw.

With such a configuration, the ground circuit of the power transformer 1 is grounded to the metal fitting 4 via the lead wire 3.

According to the conventional example, in order to ground the ground pole of the power transformer 1, the power transformer 1 may itself ground the metal frame to the ground pole as an example. Connect the terminal 1b of the ground electrode to the printed circuit board 2 once,
The lead wire 3 is indirectly connected to the metal fitting 4 through the hole 2b formed by the common circuit. For this reason, not only those requiring the lead wires 3 but also the screws 5
It was inconvenient because it took time and effort to tighten the work.

The present invention has been made in view of such a problem, and has as its object to provide a structure that produces the same effect as directly connecting to a metal frame of a power transformer without using a lead wire for grounding. .

Means for Solving the Problems In order to solve this problem, the present invention provides a printed circuit board by soldering or bending a projection with a pattern land through a hole provided in the printed circuit board with a metal fitting for mounting a power transformer. And the grounding part of the power transformer.

Action With this configuration, the grounding terminal of the power transformer is connected to the printed circuit board, and the projection from the metal fitting for mounting the power transformer is connected to the common circuit with the grounding electrode according to the pattern on the printed circuit board, thereby connecting the ground to the metal fitting. Can be performed.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, in which 6 is a power transformer, 7 is a printed circuit board, 8 is a mounting bracket for the power transformer, and terminals 6a of respective circuits provided in the power transformer 6 are shown.
And the terminal 6b for the grounding electrode are provided in each hole provided in the printed circuit board 7.
It is inserted into the hole 7b of the terminal 7a and the terminal 6b for the ground electrode, and is fixed to a pattern land formed on the printed circuit board by soldering or the like.

On the other hand, a hole formed in the terminal hole 7b of the printed circuit board 7 and the common circuit 7c from the metal fitting 8 for mounting the power transformer.
An L-shaped cut and raised portion 8a is provided so as to match 7d, and the cut and raised portion 8a is further provided with a protrusion 8b, and the protrusion 8b is inserted into the hole 7d.

Here, the projection 8b is usually connected to the pattern of the printed circuit board 7 by soldering, or there is a method of twisting and connecting the projection 8b.

With this structure, the ground pole of the power transformer 6 is electrically connected to the metal fitting 8. In this embodiment, the power transformer is described as being attached to a metal fitting. However, the present invention is also effective for a large metal fitting such as a so-called chassis.

Advantageous Effects of the Invention As described above, according to the present invention, the grounding of the power supply transformer can be directly connected to the metal fitting without using a lead wire electrically connected to the grounding pole. As described above, there is no need for a lead wire, and the joint work with the fixing screw with the bracket for mounting the power supply transformer on the lead wire or the tightening work with the screw for fixing the lead wire provided in another part of the bracket can be performed. It is unnecessary and has a remarkable effect on material reduction and productivity improvement.

Further, there is no breakage of the lead wire due to vibration, and the stability is improved because the metal fitting and the printed board are mechanically fixed by soldering or the like, and the effect is large.

[Brief description of the drawings]

1 is an assembled perspective view of one embodiment of the present invention, FIG. 2 is an assembled perspective view of a conventional example, and FIG. 3 is an exploded perspective view of the conventional example. 6 power transformer, 6a terminal, 6b terminal of ground electrode, 7 printed circuit board, 7a hole, 7b hole for ground electrode, 7c common circuit, 7d hole 8 Mounting bracket, 8a
… Cut and raised, 8b …… projections.

Claims (1)

(57) [Claims] A power transformer for connecting a ground of a printed circuit board to a ground portion of the power transformer by soldering or bending the projection with a pattern land through a hole provided on a printed circuit board with a metal fitting for mounting a power transformer. Mounting device.