JPH059796B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] This invention relates to a pilot lamp.

[Background technology]

A pilot lamp is a lamp that is installed between a circuit, a device, etc. and a power source, and provides an optical indication of the energization state of the circuit, device, etc.

This type of lamp, as shown in FIG.
and a resistor 5 are connected with a lead wire 10, and the current that is being applied to the circuit or equipment is guided to the neon lamp 4 via the terminal plate 7 and the resistor 5, and the neon lamp 4 is lit. It is designed to display the power status of devices etc. using light. In addition, 6
1 is a radiation plate for radiating the light of the neon lamp 4 to the outside, 8 is a lock spring, 9 is a release button, and 11 is a metal fitting for connecting the body 2 and the cover 3. However, this pilot lamp has the disadvantage that the luminous intensity varies because the neon lamp 4 is connected in the air by a lead wire 10 and the neon lamp 4 is not fixed, as shown by the chain line. was. Further, there was also a problem in that the lead wire 10 would break and break when subjected to vibrations or the like.

[Purpose of the invention]

The purpose of this invention is to make the luminous intensity uniform and to prevent wire breakage.

[Disclosure of the invention]

In order to achieve the above object, the pilot lamp according to the present invention is provided with a current transformer and a printed circuit board in the device main body, the printed circuit board is fixed to the device main body by peripheral press-fitting, and is separate from the printed circuit board. A current transformer is fixed at a position, and a light emitting element that emits light by a minute current is fixed and positioned on the printed circuit board, and is connected to the current transformer via a power supply lead wire extending from the current transformer. electrically connected.

Next, the present invention will be explained based on examples.

FIGS. 2 and 3 show an embodiment of the invention. In these figures, 20 is a main body of the instrument, which is composed of a cover 22 and a body 21. A printed circuit board 24 is press-fitted into the cover 22. 25 is a light emitting diode, which is attached and fixed to this printed circuit board 24. 23 is a radiation plate provided on the top of the cover 22 and radiates the light from the light emitting diode 25 to the outside; 28a;
are ribs formed inside the cover 22. A current transformer 26 that converts a load current (large current) into a minute current is housed inside the body 21, and its primary lead wire 29 is connected to a terminal plate 28 by solder 30. The secondary lead wire 27 from the current transformer 26 connects to the light emitting diode 2.
5 and is connected to a light emitting diode 25. 31 is a lock spring, 32 is a release button, and 21a is a recess for attaching an engaging fitting provided in the body 21;
A recess 22a corresponding to the recess 22a is provided in the cover 22,
The cover 22 and the body 21 are engaged with each other by an engagement fitting 33.

In this way, in this pilot lamp, the light emitting diode 25 is attached and fixed to the cover 22 by press-fitting the peripheral edge of the printed circuit board 24 to which the light emitting diode 25 is connected into the cover 22, as shown in FIG. As shown in the figure, since the parts can be roughly divided into two blocks, a cover block and a body block, assembly can be facilitated.
Then, the load current that is being applied to circuits, appliances, etc. is sent to the current transformer 26 via the terminal board 28, where it is converted from a large current to a minute current and sent to the light emitting diode 25. 2
5 emits light to visually indicate the energization status of circuits, appliances, etc.

In addition, although the light emitting diode 25 is used as a light emitting element in the above embodiment, other light emitting elements such as an LCD may be used instead.

〔Effect of the invention〕

As described above, in the pilot lamp according to the present invention, the printed circuit board is housed and fixed by press-fitting its peripheral edge into the device main body, and the light emitting element is fixed and positioned on this printed circuit board. Unlike in the past, it does not shake due to vibrations, etc., and it now emits light with uniform luminous intensity, and wire breakage due to shaking is also prevented.

Moreover, the fixing method using peripheral press-fitting provides strong fixing and does not require separate parts for fixing.
It has the advantage of requiring less time and effort.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional example, FIG. 2 is a sectional view of an embodiment of the present invention, FIG. 3 is an exploded perspective view thereof, and FIGS. 4 and 5 are explanatory diagrams of the assembled state. 20... Instrument body, 21... Body, 22...
Cover, 23... Radiation plate, 24... Printed circuit board, 25... Light emitting diode, 26... Current transformer,
27...Secondary side lead wire, 28...Terminal board.

Claims (1)

[Claims] 1 The device body is equipped with a current transformer and a printed circuit board, and this printed circuit board is fixed to the device body by peripheral press-fitting, and the current transformer is fixed at a different position from the printed circuit board, and the current transformer is fixed to the device body by a microcurrent. A pilot lamp in which a light emitting element that emits light is mounted and positioned on the printed circuit board and is electrically connected to the current transformer via a power supply lead extending from the current transformer.