JPH0132654Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a multiple limit switch in which a plurality of built-in switches are housed in one housing, and particularly relates to an improvement in the mounting position of a display element that displays the operating status of the built-in switches. .

Conventionally, in this type of multiple limit switch, in order to display the operating status of each built-in switch, it is necessary to prepare display elements corresponding to the number of built-in switches.

In this case, as shown in FIG. 1, if a plurality of display elements 12 are provided on the cover 6, the built-in switch 2
Although it is conceivable to connect the terminals 25 and the display element 12 with the lead wires 22, it would be troublesome to completely separate the cover 6 and the housing 1.
In particular, when replacing the cover 6, the display element 12, etc., the lead wire 22 had to be removed from the terminal 25.

Furthermore, since the display element 12 is assembled to the cover 6 and the cover is integrated with the housing 1,
The mounting position of the housing inevitably determines the direction in which the display element 12 should be turned on, making it inconvenient to confirm when an obstacle is present. In other words, it was not possible to arbitrarily select the lighting confirmation direction.

Since all of the display elements 12 are integrated into one cover 6, even if one display element 12 breaks down, the entire cover must be replaced.
Maintenance and replacement were inconvenient and uneconomical because even parts that were not in trouble had to be removed.

In addition, the number of built-in switches 2 increases, and the display element 1
When increasing the number of lamps lit, many lamp terminals and switch terminals had to be connected at once, making the connection work extremely difficult.

Since all the display elements 12 are attached to one cover 6, the number of display elements cannot be arbitrarily selected, and display elements have to be assembled to unnecessary locations, which is uneconomical.

This idea is an attempt to eliminate these inconveniences by making it possible to freely change the lighting confirmation direction of the display element, as well as to easily adjust the position of the connection terminal between the built-in switch and the display element when changing the direction. The aim is to obtain a limit switch.

An embodiment of this invention will be described below with reference to the drawings.

In FIGS. 2 to 8, a plurality of built-in switches 2 are housed within substantially one housing 1. As shown in FIGS.

A plunger 3 for operating a built-in switch 2 is slidably protruded from the housing 1.
Further, an opening 1a is provided on the surface of the housing 1 opposite to the surface on which the plunger 3 is protruded, and a mounting plate 4 is attached with screws 15 so as to cover this opening.

Furthermore, this mounting plate 4 is provided with a plurality of rectangular windows 5, and separate and independent covers 6 are removably attached to the mounting plate 4 with screws 7 so as to cover each window 5. There is.

The covers 6 each have an approximately trapezoidal bulge 8 by which a recess 9 is formed on the inside. Further, on the outside of the cover 6, a plurality of recesses 10 are provided on one side of the cover 6 for each built-in switch 2.
They are provided at a predetermined distance from each other so as to correspond to the recesses, and partition walls 11 are formed between these recesses by these recesses.

In each of the recesses 9, a display element 12 for displaying the operating state of each built-in switch 2 is disposed in parallel with the cover 6 and penetrating the wall surface of the recess 10. The light emitting part 13 of each display element 12 is located within each recess 10, and the terminal part 14 thereof
is located within the recess 9. The display element 12 is composed of, for example, a neon lamp or a light emitting diode.

A plate 20 is fitted on the inside of the cover 6, that is, on the mounting surface, so as to cover the opening of the mounting surface, and terminals 21, 2 are provided on both sides of the plate.
1 is provided, and this terminal has a display element 12
The other ends of the lead wires 22, 22 are connected to each other. Further, the terminals 21, 21 are provided with a nut 29, into which a screw 23 penetrates the plate 20 from the inside and is screwed into the nut.

One end of the conductive coil spring 24 is connected to the screw 2.
3 and 23 to the plate 20, and is in electrical contact with the terminals 21 and 21 via the screws.

The coil spring 24 is connected to the cover 6.
is located between the plate 20 and the built-in switch 2 when attached to the housing 1, and the other end is elastically connected to the terminal 25 of the built-in switch 2, and
make electrical contact.

In the above configuration, the cover 6 (two in the illustrated example)
By attaching the covers 6 to the mounting plate 4 with their orientations reversed as shown in FIG.
The lighting confirmation directions of the display elements 12 attached to the display elements 12 are respectively reversed.

Therefore, in FIG. 3, one cover 6
The lighting direction of the display element 12 attached to the cover 6 is on the right side in the figure,
The lighting confirmation direction of No. 2 is the left side, and lighting of the display element 12 can be confirmed from each direction.

Note that when changing the mounting direction of the cover 6, as shown in FIG.
3 and relatively move this coil spring 24 from position A to position B along the elongated hole 30 of the mounting plate 4, the electrical connection position to the terminal 25 of the built-in switch 2 can be easily adjusted. , will definitely be done.

As described above, this invention provides a plurality of windows 5 on the mounting plate 4 that covers the housing 1, and a cover 6 that covers each window 5 separately and detachably is attached to this mounting plate, and the side wall opening of this cover is A display element 12 for displaying the operating state of the built-in switch 2 is provided on the cover, with the light emitting part 13 facing the cover, and a conductive coil spring 24 is provided to electrically connect between the display element 12 and the built-in switch 2. The housing 1 is attached to the plate 20 in a position adjustable manner, and the plate 20 is attached to the cover.
The lighting confirmation direction of the display element 12 can be arbitrarily selected regardless of the mounting position of the display element 12, and there is no need to worry about obstacles.

Furthermore, since the cover 6 is removably attached to the mounting plate 4, the lighting confirmation direction of the display element 12 can be changed simply by changing the mounting direction of the cover 6.
In the case of a failure of the display element 12, the display element 1
Only the cover 6 to which the cover 2 is attached needs to be replaced, making maintenance and replacement easy and economical.

Even if the number of built-in switches and display elements increases, the display elements and built-in switches can be connected for each cover 6, making the connection work easy.
Effects such as reliable and safe connection can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a front sectional view showing a conventional multiple limit switch, Fig. 2 is a front sectional view of the multiple limit switch according to this invention, Fig. 3 is a bottom view, Fig. 4 is a side view, and Fig. 5 is a front sectional view of the multiple limit switch according to the present invention. front view of the cover,
6 is a side view, FIG. 7 is a side sectional view of the cover, and FIG. 8 is an enlarged front sectional view of the terminal. 1...Housing, 2...Built-in switch, 3...Plunger, 4...Mounting plate, 5...Window, 6...Cover, 7
... screw, 8 ... bulge, 9 ... recess, 10 ... recess, 1
DESCRIPTION OF SYMBOLS 1... Partition wall, 12... Display element, 13... Light emitting part, 14
...Inner end, 20...Plate, 21...Terminal,
22... Lead wire, 23... Screw, 24... Coil spring, 25... Terminal, 30... Oblong hole.

Claims (1)

[Scope of utility model registration request] In addition to accommodating a plurality of built-in switches 2,
A housing 1 in which a plunger 3 for operating these built-in switches is protruded to the outside, a mounting plate 4 that covers an opening of the housing 1 formed on the terminal side of the built-in switch 2, and a mounting plate 4 provided on the mounting plate 4. A plurality of removable covers 6 separately and independently cover a plurality of windows, and a light emitting section 13 is held inside each cover 6 and faces an opening formed in a side wall of the cover, and the corresponding built-in A plurality of display elements 12 for displaying the operating status of the switch, a conductive coil spring 24 having a lead wire connection terminal of the display element 12 on one side and electrically connected to the lead wire connection terminal on the other side. A plate 20 is provided along the hole 30 so as to be freely adjustable in position and is attached to the cover.
A multiple limit switch equipped with and.