JPH0361292B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] This invention relates to a switch having a display element.

``Prior Art'' Conventionally, when this type of switch causes an indicator light to blink due to its operation, an indicator light and a resistor are prepared separately from the switch, and these are placed outside the switch and are connected to the circuit using the switch's terminals and electric wires. However, in forming this circuit, it is not only easy to make wiring errors, but also the wiring is complicated and requires extra space.

"Purpose" This invention takes into account the drawbacks of the conventional technology,
It is an object of the present invention to provide a switch with an indicator light that is less prone to erroneous connections, has simple wiring, and requires less wiring space.

"Overview" In order to achieve the object, the present invention provides a groove in the side wall of the housing, fits a support into the groove, attaches a light emitting element to the support, and furthermore, connects one lead wire of the light emitting element. correspond to selectively and electrically contact the movable contact,
Further, the other lead wire of the light emitting element is electrically connected to the fixed contact plate.

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

That is, in FIG. 1, the housing 1 has an opening on one side, which opening is covered by a well-known cover (not shown). The anchor 2 formed by bending a conductive metal piece has one end fitted into the first wall 3 of the housing 1, and the other end fitted into the second wall opposite the first wall 3. It passes through the portion 4 and extends outside the housing 1 to form a common terminal 5. One end of the lever 6 is in contact with the intermediate portion of the anchor 2 so as to be rotatable about this as a fulcrum, and the other end is in contact with a plunger 7 that is slidably supported by the housing 1. The movable contact plate 11 is housed in the housing 1 and has one end engaged with the other end of the lever 6, and the spring 12 has one end connected to the anchor 2 and the other end connected to the free end side of the movable contact plate 11. be done. Furthermore, a movable contact 13 is fixed to the free end of the movable contact plate 11. A fixed contact plate 15 formed into an L-shape by bending a conductive metal plate is inserted into one of grooves 17 and 18 formed at a predetermined distance from each other in the third wall 16 of the housing 1. One end, that is, the bent side end is located inside the housing 1, and the other end projects outside the housing 1 to form a normally open terminal 21. Then, in the housing 1, the fixed contact plate 1
5 is provided with a fixed contact 22 that selectively contacts the movable contact 13. A support base 25 formed in an L shape by a bent portion 23 is fitted into the other of the grooves 17 and 18 in the third wall portion 16 of the housing 1, and one end thereof, that is, the bent portion 23 side is inserted into the housing 1. The engaging protrusions 27, 27 formed at the ends thereof are adapted to engage with the housing 1 and the cover, respectively. A light-emitting element 29, such as a light-emitting diode or a neon lamp, is provided on the support base 25, and its light-emitting portion is located at the other end of the support base 25, that is, when the support base is fitted into the housing 1, it is exposed outside the housing 1. located so that it stands out. A groove 30 is formed on one surface of the support base 25 along its longitudinal axis,
Further, a recess 32 is formed on the bent portion 23 side. Further, in the recess 32, the support base 25 is provided with a hole 34 passing therethrough. and recess 3
2 accommodates a resistor 31. One lead wire 35 of the light emitting element 29 is accommodated in the groove 30 and electrically connected to one end of the resistor 31 at its end. The other lead wire 36 is bent and electrically connected to the fixed contact plate 15 at its end. Also, a fixed contact 37 formed in an L shape
One piece 37a is electrically connected to the other end of the resistor 31, and the other piece 37b passes through the hole 34 and projects onto the other side of the support base 25, so as to selectively contact the movable contact 13. is being used. Furthermore, a convex portion 39 having approximately the same protruding height as the fixed contact 22 is formed on the other surface of the support base 25 .

Note that although the switch shown in FIG.
This is done by changing the position relative to the

If the resistor 31 is not particularly required, one lead wire 35 of the light emitting element 29 may be directly connected to the fixed contact 37 or may be made to correspond directly to the movable contact 13 through the hole 34.

Further, the other lead wire 36 of the light emitting element 29 may be provided along the groove formed in the third wall portion 16 or the cover.

"Operation" In the state shown in Fig. 1, the movable contact 13 is
5 side, and is in direct electrical contact with the fixed contact 37. In other words, the movable contact 13 is the fixed contact 22
The switch is mechanically and electrically separated from the switch, forming a normally open switch. Therefore, the electric circuit in this case is formed so that the current passes through the common terminal 5, the movable contact plate 11, the resistor 31, the light emitting element 29, and the fixed contact plate 15, that is, the normally open terminal 21, as shown in FIG. As a result, the light emitting element 29 lights up, thereby indicating that the switch is in the open state.

Next, when the plunger 7 is pressed, the movable contact plate 11 is reversed together with the spring 12 by the snap action action, and at the same time the movable contact 13 is separated from the fixed contact 37 and comes into contact with the fixed contact 22. Therefore, the light emitting element 29 goes out, indicating that the switch is in the inverted state.

In addition, in the case of a normally closed switch, that is, a state in which the movable contact plate 11 is always in contact with the fixed contact plate 15, more specifically, in the case of a normally closed switch, the fixed contact plate 1
5 and the support stand 25 are in the opposite position, the electric circuit is in the state shown in FIG. 5, and the light emitting element 29
No current flows through the lamp, which means that the light is off.

However, when the movable contact plate 11 is reversed, the movable contact 1
3 separates from the fixed contact 22 and comes into contact with the fixed contact 37, so a current flows through the light emitting element 29, and the light emitting element lights up to indicate that the switch is in the open state.

"Effects" As described above, the present invention provides the fixed contact plate 15 and the support base 25 on the side wall of the housing 1 at a predetermined distance from each other, and the support base 25 has a light emitting element 29.
is provided so that its light emitting part is exposed outside the housing 1, and one lead wire of the light emitting element is arranged so as to selectively contact the movable contact 13,
In addition, since the other lead wire is connected to the fixed contact plate 15, there is no need to form a special indicator light circuit, and therefore there is no possibility of erroneous connection. Furthermore, the support base 25 and the fixed contact plate 15 have the advantage that by changing their mounting positions, they can be configured as a normally open switch or a normally closed switch.

[Brief explanation of drawings]

Fig. 1 is a front view showing one embodiment of the switch in the present invention, Fig. 2 is a vertical sectional view of the support stand, and Fig.
The figure is an exploded perspective view of the support base, and FIGS. 4 and 5 are electrical circuit diagrams. DESCRIPTION OF SYMBOLS 1... Housing, 2... Anchor, 3... First wall part, 4... Second wall part, 5... Common terminal,
6... Lever, 7... Plunger, 11... Movable contact plate, 12... Spring, 13... Movable contact, 1
5...Fixed contact plate, 16...Third wall portion, 17...
...Groove, 18...Groove, 21...Normally open terminal, 22...
Fixed contact, 23... bending part, 25... support stand,
27... Engaging convex portion, 29... Light emitting element, 30...
groove, 31... resistance, 32... recess, 34... hole,
35... Lead wire, 36... Lead wire, 37...
Fixed contact, 39... Convex portion.

Claims (1)

[Claims] 1. An anchor 2 is fixed to the housing 1, a movable contact plate 11 is housed in the housing 1, and a pair of grooves 17 and 18 are formed in one wall of the housing 1 at predetermined positions. A fixed contact plate 15 is provided in one of these grooves at an interval of
and the support stand 25 is fitted into the other groove, and the movable contact plate 11 is fitted into the fixed contact plate 15.
A fixed contact 22 that selectively contacts the movable contact 13 of
Further, a light emitting element 29 is provided on the support base 25.
is provided so that its light emitting part is exposed outside the housing 1, and one lead wire 35 of the light emitting element 29 is arranged so as to selectively and electrically contact the movable contact 13, and A switch characterized in that the other lead wire 36 is electrically connected to the fixed contact plate 15. 2. The support base 25 and the fixed contact plate 15 are formed into an L shape, and their bent side ends are respectively engaged with the inner wall of the housing 1 within the housing 1, as set forth in claim 1. switch. 3. A convex portion 39 having a height approximately equal to the protrusion height of the fixed contact is formed on the surface of the support base 25 facing the fixed contact 22, and the one lead wire 35 is connected to the movable contact 13 through this convex portion. The switch according to claim 1, which corresponds to the above. 4. The switch according to claim 1, wherein one lead wire 35 of the light emitting element 29 is disposed along a groove 30 provided in the support base 25. 5 fixing the anchor 2 to the housing 1, accommodating the movable contact plate 11 in the housing 1, and providing a pair of grooves 17 and 18 in one side wall of the housing 1 at a predetermined distance from each other; A fixed contact plate 15 is placed in one of these grooves.
and the support stand 25 is fitted into the other groove, and the movable contact plate 11 is fitted into the fixed contact plate 15.
A fixed contact 22 that selectively contacts the movable contact 13 of
Further, a light emitting element 29 is provided on the support base 25.
A resistor 31 is provided in a portion of the support base 25 located inside the housing 1, and one lead wire of the light emitting element 29 is connected to one end of the resistor. 35 and the other lead wire 36 are connected to the fixed contact plate 15, and the resistor 31 is connected to the fixed contact plate 15.
The other end of the switch is connected to one end of a fixed contact 37, and the other end is arranged to selectively and electrically contact the movable contact 13. 6. The switch according to claim 5, wherein the support base 25 is formed in an L-shape, and the resistor 31 is provided inside the bent portion of the support base. 7 The resistor 31 is housed in a recess 32 formed in the support base 25, and the fixed contact 3
6. The switch according to claim 5, wherein the other end of the switch 7 passes through a hole 34 provided in the support base 25 to correspond to the movable contact 13.