JPH0510785B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electromagnetic relay with an operation indicator light.

<Prior art and its problems> Conventional electromagnetic relays of this type include those in which a series body of a light-emitting diode or neon lamp for operation indication and a current-limiting resistor are directly connected in parallel to an electromagnetic coil; 2 to be excited
There is one in which a secondary coil is wound on the electromagnetic coil, and the series body is connected in series to the secondary coil.

The former type has the disadvantage that even if the electromagnetic coil is disconnected, current flows through the series body, and the display remains in the operating display state.

The latter type does not have the problem of displaying an operation display even if the electromagnetic coil is disconnected, but it is troublesome to wind the secondary coil, and the secondary coil and the above series body are connected by soldering, etc. It is easy to cause wire breakage when directly brazing, and the workability is poor.

<Object of the Invention> This invention was made to eliminate the drawbacks of the above-mentioned conventional ones, and in addition to eliminating display malfunctions,
The object of the present invention is to provide an electromagnetic relay with an operation indicator light that can improve assembly work.

<Configuration and Effects of the Invention> In order to achieve the above object, the present invention provides an electrically insulating film with a planar coil and a light emitting diode connected in series with the planar coil via a current limiting resistor, and energizes the electromagnetic coil. This invention is characterized in that the film is clamped between the electromagnetic coil and the iron core frame so that an induced voltage is generated in the planar coil.

As is clear from this configuration, in this invention,
If the electromagnetic coil is disconnected, the light-emitting diode will no longer emit light, which eliminates the possibility of incorrect display. In particular, if you prepare a film with the above-mentioned planar coil or light-emitting diode in advance, you can use this film when assembling. It can be easily assembled to the electromagnetic block side, and therefore the risk of disconnection of the secondary coil during assembly, which is conventional, can be eliminated, and productivity is improved.

<Description of Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of an electromagnetic relay with an operation indicator light according to the present invention.

In the figure, reference numeral 1 denotes an electrically insulating terminal base, on which a pair of fixed contact pieces 2, 3, a fixed terminal 4, a coil terminal 5, etc. are implanted. Reference numeral 6 denotes an L-shaped iron core frame fixed to the base 1, and an iron core 7 is caulked to a vertical piece 6a of the L-shaped iron core frame. 8
1 is an electromagnetic coil wound around the iron core 7 via a spool 9; 10 is a movable iron piece pivotally supported at the tip of the horizontal piece 6b of the iron core frame 6; and 11 is a return spring for the movable iron piece 10. The movable iron piece 10 includes an electrical insulating stand 1
A movable contact piece 13 is fixed via the movable contact piece 2, and a movable contact 16 that comes into contact with and separates from each of the fixed contacts 14 and 15 of the fixed contact pieces 2 and 3 is fixed to the tip of this movable contact piece 13. There is. 16 and 17 are lead wires.

Reference numeral 18 is an electrically insulating film, for example, formed in a rectangular shape. In this film 18,
As shown in FIG. 2, a spiral planar coil 19 made of copper foil, for example, is formed around the center hole 20 at one end, and a current limiting coil 19 is formed at the other end across the rectangular hole 21. A resistor 22 and a light emitting diode 23 as an operation indicator are provided, and these three are connected to wiring patterns 24, 24 made of copper foil.
A to 24c are connected in series. 25,
25 is a wiring pattern 24 of the light emitting diode 23
The soldered parts for a and 24b, 26 and 26 are the wiring pattern 24 ₂ of the resistor 22 and the planar coil 1
9 is a soldered portion to one end of the coil 1, and 27 is a planar coil 1.
This is the conductor bonding portion between the other end of the wiring pattern 9 and the wiring pattern 24c.

After forming the circuit, the other end of the film 18 is bent along a predetermined folding line l-l along one side of the rectangular hole 21 at a substantially right angle in the direction of arrow a. Then, when assembling the electromagnetic block, one end is inserted between the vertical piece 6a of the core frame 6 and the electromagnetic coil 8 as shown in FIG. 7, and the other end side is attached to the horizontal part 6b of the iron core frame 6.
It is fixed with adhesive etc. In addition, the planar coil 1
9 etc. are surface-treated with an insulating coating (not shown) in order to electrically insulate them from the iron core frame 6 etc.

In the above configuration, the iron core 7 is excited by energizing the electromagnetic coil 8. Therefore, the movable iron piece 10
is attracted to the iron core 7, so that the movable contact 16 of the movable contact piece 13 and the fixed contact 15 are closed. On the other hand, by energizing the electromagnetic coil 8, an induced voltage is generated in the planar coil 19, and the light emitting diode 23 emits light to display an operation.
Conversely, when the electromagnetic coil 8 is cut off, the movable iron piece 10
is returned by the spring force of the return spring 11, so the movable contact 16 and the fixed contact 15 are opened. At this time, since no induced voltage is generated in the planar coil 19, the light emitting diode 23 also does not emit light.

Here, if the electromagnetic coil 8 is disconnected, no induced voltage is generated in the planar coil 19. In other words, there is no possibility of an erroneous display such as when the light emitting diode 23 lights up when the coil 8 is disconnected. In particular, the planar coil 19, the light emitting diode 23, etc. are covered with an electrically insulating film 18 in advance.
If the film 18 is provided in the electromagnetic block, the film 18 can be easily assembled to the electromagnetic block when assembling the electromagnetic relay. In other words, the time and effort required to wind the secondary coil on the electromagnetic coil and the soldering work during assembly, which are conventional, can be omitted, and the product can be manufactured efficiently.

Note that the method is not limited to bending the other end of the insulating film 18, and depending on the position of the display window (not shown), the arrangement space, etc., the film 18 may not be bent. It is also possible to use it for

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of an electromagnetic relay with an operation indicator light according to the present invention, and FIG. 2 is a perspective view of a main part of the same electromagnetic relay including an electrically insulating film. 6... Iron core frame, 8... Electromagnetic coil, 18... Electrical insulating film, 19... Plane film, 22
... Current limiting resistor, 23... Light emitting diode.

Claims (1)

[Claims] 1 A planar coil is formed on an electrically insulating film, and a light emitting diode for operation display is connected in series to this planar coil via a current control resistor, and the planar coil is excited by energization of an electromagnetic coil. An electromagnetic relay with an operation indicator light, characterized in that the film is clamped between an electromagnetic coil and an iron core frame.