JPH01289029A - Display device for switch operation - Google Patents

Abstract

PURPOSE:To facilitate the wiring and enable the fixing of a display lamp unit to the switch and the wiring therebetween simultaneously by constructing the display lamp unit in such a manner that a plurality of terminal segments, to be connected with a switch terminal, are fixed to a substrate and a display lamp is connected between a common terminal segment and another terminal segment among these terminal segments. CONSTITUTION:L-shaped terminal segments 9 i.e. a common terminal segment 9a, a normally opened terminal segment 9b, and a normally closed terminal segment 9c corresponding to a common terminal 2a, a normally opened terminal 2b, and a normally closed terminal 2c respectively are fixed at the end portion along the longitudinal direction of an insulating substrate 7. One end of a resistor 11 is connected to the common terminal segment 9a via a printed circuit conductor 10, and a display lamp 12 i.e. light emitting diode is connected to the other end of this resistor in series. Further, the display lamp 12 is connected to the normally opened terminal segment 9b and the normally closed terminal segment 9c via a changeover switch 14 and the printed circuit conductor 10. In this way, the display lamp unit 13 is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a switch operation display device that displays the open/close operation status of a contact.

[Prior art and its problems]

Conventionally, this type of device has been provided with a terminal 2.2 for cable connection on the end wall of a switch 1 housing an opening/closing mechanism as shown in FIG. 2.2, and the cover 41 has a terminal 42.4 connected to the indicator light 12.
2 is provided. Then, wires such as lead wires are connected to the terminals 2.2 of the switch 1, and the terminals 2, 2
and the terminals 42 and 42 of the cover 41 are connected.

For this reason, a predetermined space is required between the terminal surface of the switch 1 and the cover 41, but its dimensions are subject to restrictions depending on the location where the switch 1 is installed. Therefore, it was not only difficult to connect the wires (there was a risk that the connection could not be made reliably).

[Purpose of the invention]

SUMMARY OF THE INVENTION In view of these conventional problems, it is an object of the present invention to make wiring work easy and reliable, and to simultaneously perform the fixing of an indicator light unit to a switch and the wiring work.

[Summary of the invention]

In order to achieve the object, the present invention fixes a plurality of terminal pieces connected to the terminals of the switch to an insulating substrate of the indicator light unit, and among the terminal pieces, a common terminal piece and other terminals. It is constructed by connecting an indicator light between the pieces, and the indicator light unit is fixed to the switch by connecting these terminal pieces to the terminals of the switch, and the connection of the lead wire to the terminal is also made at the same time. [Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

That is, in FIG. 1, the switch l is constituted by a snap action switch or the like, and the bottom wall thereof has a plurality of terminals 2, namely, a common terminal 2a, a normally open terminal 2b, and a normally closed terminal 2.
c etc. are provided. These terminals have internal threads 4 and 1.
A terminal screw 5 is screwed into this female screw.

On the other hand, an L-shaped terminal piece 9 having a through hole 8, that is, a common terminal piece 9a, a normally open terminal piece 9b, and a normally closed terminal piece 9a, has an insulating substrate, for example, a rectangular printed circuit board. Terminal pieces 9c are fixed corresponding to the common terminal 2a, the normally open terminal 2b, and the normally closed terminal 2c, respectively. One end of a resistor 11 is connected to the common terminal piece 9a by a printed circuit conductor io, and an indicator light 12, ie, a light emitting diode, is connected to the other end of this resistor to form one series circuit. Indicator lamp 12 is also connected to normally open terminal piece 9b and normally closed terminal piece 9cK via changeover switch 14 and printed circuit conductor lO. This forms the indicator light unit 1a.

Further, a crimp terminal 17 having a through hole 16 is connected to the conductive wire 15 forming the power supply circuit and the control circuit, and this crimp terminal is attached to the switch 1 together with the terminal piece 9 by the terminal screw 5. That is, by inserting the terminal screw 5 into the through hole 8 of the crimp terminal 17 and screwing it into the female screw 4, the indicator light unit 13 is fixed to the switch 1 as shown in FIG. is changeover switch 14
Common terminal 2a, normally open terminal 2b and normally closed terminal 2
Further, the conductor 15.15 is connected to the common terminal 2a.
and is connected to the normally open terminal 2b.

FIG. 3 shows the electrical circuit in FIG. 1, in which the movable contact 21 contacts the normally closed contact 23 and is open relative to the normally open contact 22 in the switch 1. FIG. The common terminal 2a is connected to one terminal of the power source 26 via the load 25, and the normally open terminal 2b is connected to the other terminal of the power source 26. Further, in the changeover switch 14, one end of the indicator light 12, that is, the cathode of the light emitting diode is connected to the common terminal 14a of the changeover switch 14, and the changeover piece 14d connected to the common terminal 14aK is connected to the changeover terminal 14b connected to the normally open terminal piece 9bK.
and selectively contact the switching terminal 14c connected to the normally closed terminal piece 9c.

In other words, in the state shown in FIG. 3, the movable contact 21 is the normally closed contact 2.
3 and the changeover piece 14d of the changeover switch 14 comes into contact with the changeover terminal 14c connected to the normally closed terminal 2c, so the indicator light 12 is short-circuited and therefore does not light up.

However, when the movable contact 21 is reversed to the normally open fixed contact 22 side, current flows from the common terminal 2a side to the series circuit of the resistor 11 and the indicator lamp 12, so that the indicator lamp 12 lights up.

Furthermore, when the switching piece 14d of the changeover switch 14 is switched to the switching terminal 14b, that is, the normally open fixed terminal 2bll, and the power supply 26 and load 25 are connected between the common terminal 2a and the normally open terminal 2b, the movable contact 21 is normally Closed contact 23
The indicator light 12 lights up when the movable contact 21 is in contact with the normally open contact 229111, but the indicator light 1
2 is short-circuited, so it goes out.

The terminal shown in Fig. 4 is an open terminal having a notch 28 instead of the round hole terminal having the page through hole 8 as shown in Fig. 1, and is different from the terminal shown in Figs. 1 and 3. The difference is that the indicator light unit 13 can be attached to and detached from the switch 1 without completely removing the terminal screw 5 from the female screw 4.

Although the indicator light 12 is shown as being formed of a light emitting diode, a neon lamp or an incandescent lamp may be used as required.

FIG. 5 shows an enclosed switch formed by accommodating the switch 1 shown in FIG. 1 in a housing 30.
A display window 31 forming a lens portion made of a translucent material is protruded from the wall surface of the housing 30, and the display window accommodates the display light 12 and faces the display window 31.

〔Effect of the invention〕

As described above, this invention includes a common terminal piece 9a, a normally open terminal piece 9b, and a normally closed terminal piece 9 on a substrate 7 formed separately from the switch 1.
c, and an indicator light 12 is connected between the common terminal piece 9a, the normally open terminal piece 9b, and the normally closed terminal piece 9c, and the indicator light 12 is connected to the board 7 between the normally open terminal piece 9b and the normally closed terminal piece 9c. Since the indicator light unit 13 is formed by providing the changeover switch 14 that selectively connects to the terminal piece 9cK, the installation of this indicator light unit to the switch IVC does not require any separate parts, and moreover, Wiring space can be obtained. Further, since dedicated mounting does not require any parts, the mounting space of the switch 1 can be reduced compared to conventional ones.

Furthermore, the fixing and electrical connection of the indicator light unit 13 to the switch IVc and the connection of the conductor 15 to the switch 1 can be performed simultaneously, and the selection between the normally open terminal piece 9b and the normally closed terminal piece 9c of the indicator light 12 can be made using a changeover switch. 14 switching operations, the operation is extremely easy and highly reliable wiring can be realized.

Note that the switch 1 itself has the advantage that a conventional switch can be used as is.

[Brief explanation of the drawing]

1 is an external perspective view showing an embodiment of a switch operation display device according to the present invention, FIG. 2 is an exploded perspective view of FIG. 1, FIG. 3 is an electric circuit diagram of the device shown in FIG. 1, and FIG. The figure is an exploded perspective view showing another embodiment of the present invention, FIG. 5 is a partially cutaway perspective view showing an example in which the switch of FIG. 1 is applied to an enclosed type switch, and FIG. It is a front view showing a conventional device. 1...Switch, 2...Terminal, 4...Female thread, 5
...Terminal screw, 7... Board, 8... Through hole, 9...
...Terminal piece, 10...Printed circuit conductor, 11...
Resistor, 12... Indicator light, 13... Indicator light unit,
14... Selector switch, 15... Conductor, 16...
・Through hole, 17...Crimp terminal, 21...Movable contact,
22... Normally open contact, 23... Normally closed contact, 25...
Load, 26... Power supply, 28... Notch, 30...
-Housing, 31...display window. Patent applicant: Yamatake Honeywell Co., Ltd. No. 4
figure

Claims (1)

[Claims] Common terminal (2a), normally open terminal (2b) and normally closed terminal (
2c), and an insulating substrate formed separately from this switch, the common terminal (2a),
A common terminal piece (9a), a normally open terminal piece (9b), the normally closed terminal piece (9c), and the common terminal piece (9a) connected to the normally open terminal (2b) and the normally closed terminal (2c), respectively.
and the normally open terminal piece (9b) and the normally closed terminal piece (9c).
) and the indicator light (12) connected between the normally open terminal piece (9b) or the normally closed terminal piece (9c).
) is provided with an indicator light unit (13) formed by providing a changeover switch (14) selectively connected to the common terminal piece (9a), the normally open terminal piece (9b) and the normally closed terminal piece (9c). ) to the common terminal (2a), normally open terminal (2b), and normally closed terminal (2c), the indicator light unit (13) is connected to the switch (
1) A switch operation display device, characterized in that it is fixed to: