JPH0470728B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a switch that opens and closes a load by reversing the operation of an operator, and a switch with an indicator light.

[Prior Art] Conventional switches have small knobs or operators and lack luxury in design. Furthermore, in the past, when a switch for blinking a light was provided in a dark place when the light was turned off, there was an inconvenience that the user had to grope for the switch when trying to turn on the light.

[Problems to be Solved by the Invention] Conventional switches have had the problem that the operator cannot be made large, and a switch with a luxurious design has been desired. Also, with conventional switches, the light that indicates the position is weak, and depending on the structure of the opening/closing part of the switch, it is not possible to emit light from the entire surface, and only a part of the surface of the switch can emit light. Therefore, there were problems in that the position of the switch was unclear and the characters and symbols used to display the switch circuit were illegible.
Furthermore, the durability and reliability of the opening/closing mechanism and light-emitting display structure of conventional switches are insufficient.
There was a desire for a switch that was even more durable and reliable.

The present invention solves the above problems and provides a switch with a luxurious design, a strong light indicating the switch,
Another object of the present invention is to provide a switch that can emit light from the entire surface of the switch and has excellent durability and reliability, and a switch with an indicator light.

[Means for Solving the Problems] In order to solve the above problems and achieve the object of the invention, a switch and a switch with an indicator light according to the present invention are characterized in that they are configured as follows. That is, the switch according to the first invention houses a switch mechanism and a connecting terminal section that open and close a fixed contact and a movable contact by operating an operator pivotally supported on the upper lid, in a container body formed by a case body and an upper lid. place,
A mounting shaft provided on the top lid attached to the case body, a mounting leg provided on the operator rotatably and removably supported on the mounting shaft, and a mounting leg portion that is fitted onto the top lid from below. A converter that is pivotably supported and performs a reversing operation integrally with the reversing operation of the operator, and a reversing operation axis of the converter and the reversing operation axis of the operator are provided on the same axis line, and the operator is connected to a large rectangular interconnection wiring device. It is characterized by being formed to be almost the same size as the boss.

Further, the switch with an indicator light according to the second invention includes a switch mechanism and a connecting terminal portion, which open and close a fixed contact and a movable contact by operating an operator pivotally supported on the top lid, in a container body formed by a case body and a top lid. a mounting shaft provided on the top cover attached to the case body; a mounting leg provided on the operator rotatably and removably pivoted on the mounting shaft; and the top cover. a converter that is fitted from below and supported by a shaft and rotates in reverse together with the reversing operation of the operator, and a reversing operation axis of the converter and a reversing operation axis of the operator are provided on the same axis, and the operator is A fixed contact and a movable contact are formed between a reversing drive unit that opens and closes the engaging end of the movable contact provided on the converter, and is formed to be approximately the same size as the boss of the large rectangular interconnection wiring device, and is operated by an operator to connect a fixed contact and a movable contact. A light-emitting indicator that displays the open or closed state of a switch mechanism for opening and closing, a transparent body provided between an operator and a converter, and a protrusion provided at an end of the transparent body. , the protrusion is fitted into and exposed on the surface of the operator to display both the closed state and/or open state of the switch and the opening/closing operation direction.

[Example] Next, an example of the present invention will be described based on the drawings.

1 is a front view of a first embodiment of a switch according to the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a sectional view of the main part of FIG. 2, and FIG. 4 is a line A--A in FIG. A-line sectional view,
FIG. 5 is an exploded perspective view of the main parts, and FIG. 6 is a partially cutaway front view of the first embodiment. Here, 20 is a case body, 21 is a top lid, 30 is a converter, 32 is a reversal drive part, 40 is a movable contact, 41 is a reversal drive part,
42 is a movable contact, 50 is a support piece, 60 is a light emitting display, and 80 is an operator.

First, the switch mechanism will be explained.

The case body 20 has a box shape, and a top cover 21 is attached to the case body 20. That is, the upper lid 21
is fixed to the case body 20 by caulking the end of the lid stopper plate 22. A terminal on which a fixed contact 24 is formed is disposed in the case body 20, and an electric wire inserted from an electric wire insertion hole 25 is held at the terminal by a pressing spring 26. 27 is a release button,
The electric wire can be removed by pressing the release button through the insertion hole 28 with a screwdriver or the like in the bending direction of the spring 26.

A converter 30 is pivotally supported on the upper lid 21, and an operator 3
0 rotates around the rotation axis 31. This convertible 3
At the lower part of
A reversing drive 32 is provided which engages with. In this embodiment, a groove portion 33 having a width slightly larger than the material thickness of the movable contact 40 is provided as the reversing drive portion 32 to ensure engagement between the reversing drive portion 32 and the reversed drive portion 41. . Moreover, the converter 30
The reversal drive unit 32 of the movable contact 40 provided at the bottom of the
are provided hanging down from the side wall of the converter 30 on both sides of the movable contact 42. With this configuration, it is possible to incorporate an indicator light inside the converter 30, and when the indicator light is incorporated, a transparent material is used for the operator 80 to brighten the entire surface of the operator 80. Alternatively, as in this embodiment, it is possible to make the operator 80 opaque and provide the protrusion 36 on the transparent body 35 so that the protrusion of the transparent body becomes bright. Further, since the converter 30, the movable contact 40, etc. are formed symmetrically so as to hang down on both sides, distortion such as twisting does not occur.

A mounting shaft 29 is provided on the upper lid 21 attached to the case body 20. and the mounting shaft 29
A mounting leg 81 provided on the operator 80 is fitted and pivotally supported in a reversible and detachable manner.
Further, a converter 30 is fitted into the upper lid 21 from below and is pivotally supported, and rotates in reverse together with the reverse operation of the operator 80. The reversing operation axis of the converter 30 and the reversing operation axis of the operator 80 are provided on the same axis, and the operator 80 is formed to have approximately the same size as the boss of the large rectangular interconnection wiring device.

As described above, the operating element 80 and the converter 30 are pivotally supported on the upper lid 21, and the reversing axis of the operating element 80 and the reversing axis of the converter 30 are provided on the same axis. That is, the mounting leg portion 8 of the operator 80
1. Since the mounting shaft 29 of the upper lid 21 and the reversing operation shaft 31 of the converter 30 are provided on the same axis, the operator 8
0 can be formed to have almost the same size as the boss of the large rectangular wiring device, and in this way, the operator 80
Even if the value is increased, the switch operates well and reliably. Furthermore, since the operator 80 can be made larger, the design of the switch can be made more luxurious.

In this embodiment, a reversing drive section 32 of the movable contact 40 provided at the lower part of the converter 30 and a reversing drive section 32 of the movable contact 40 provided at the inner bottom of the case body 20 are used.
a support piece 50 that pivotally supports the engagement end portion 44 provided at the lower end of 0 and elastically deforms downward, and the support piece 50
a connecting portion 53 that is provided from one lower end of the connecting portion 52 via the bent portion 52 and connected to the connecting terminal portion 23;
The reversal drive section 32 provided on the converter 30 carries a reversal drive section 41 provided at the other end of the engagement end 44 of the movable contact 40 .

The movable contactor 40 includes a reversible drive portion 41 that engages with the groove portion 33 of the converter 30 within the case body 20;
It has a movable contact 42, a notch 43 formed near the movable contact 42, and an engagement end 44 provided at the lower end of the movable contact 40, and the engagement end 44 is a pivot point of the support piece 50. It is pivoted at 51.

The support piece 50 is disposed at the inner bottom of the case body 20 and has an engagement end 4 provided at the lower end of the movable contact 40.
4 and is elastically deformed downward.

Further, a connecting portion 53 is provided at one lower end of the support piece 50 via a bent portion 52, and the connecting portion 53 is connected to the connecting terminal portion 23. Further, an elastic piece 54 that rebounds in the insertion direction of the support piece 50 is disposed at the other end of the support piece 50.
is in elastic contact with the inside of the case body 20.

Furthermore, a reversing drive section 3 provided on the converter 30
2 carries a reversible drive portion 41 provided at the other end of the engaging end portion 44 of the movable contact 40.

This configuration prevents the support piece 50, the bent portion 52, the connecting portion 53, and the elastic piece 54 from breaking due to repeated bending fatigue, and significantly extends the life of the switch.

Further, a mounting shaft 29 provided on the upper lid 21
is provided so as to protrude inward from the fitting hole of the converter 30 provided in the upper cover 21, and is fitted and pivoted from below on the mounting shaft 29 of the upper cover 21, thereby enabling the reversing operation of the operator 80. The reversing operation shaft 31 of the converter 30, which integrally performs reversing operation, is aligned with the same axis as the mounting shaft 29, and is provided in a downwardly expanded state.

With this configuration, assembly is easy, the switch can be opened and closed reliably, and the operator can be made larger, making the switch more luxurious in design.

In this embodiment, the support piece 50 is approximately M
A connecting portion 53 is formed in a letter shape and is connected to the connecting terminal portion 23 provided from the lower end of one of the supporting pieces 50 via a bent portion 52; It is formed from an elastic protrusion 55 that is folded back in the direction and comes into elastic contact with the inner bottom of the case body 20.

Since the supporting piece 50 is formed as described above, the bent end on the M-shaped connecting part 53 side is located at the inner bottom of the case body 20 to pivotally support the engaging end 44 and Elastically deforms downward and in the reverse direction. The inner bottom of the case body 20 has a support piece 5
A slight elastic deformation before and after the zero reversal direction is allowed, and a large downward elastic deformation is allowed.

The bent portion 52 is disposed near the engaging end portion 44 that engages with the pivot point 51 of the support piece 50, which is the base point for the reversal operation of the movable contact 40, and
An elastic protrusion 55 that comes into elastic contact with the inner bottom of the support piece 50
Since the bending portion 52 is arranged in a waveform, it is possible to reduce the amount of elastic deformation of the bending portion 52 compared to the reversal movement width of the movable contact 40, and the slight elastic deformation can be absorbed by the bending portion 52 bent into a wave shape. At the same time, since the elastic protrusion 55 can also absorb elastic deformation,
Breakage of the support piece 50 can be prevented, and the life of the switch can be significantly extended.

Further, a notch 43 is formed in the vicinity of the movable contact 42 of the movable contactor 40, and the movable contact 42 is configured to follow the swinging motion of the reversed drive portion 41 with a surplus of force. Therefore, it is possible to cope with wear and tear, and even if the operator 30 is touched, the reversible drive portion 41 first swings and then the movable contact 42 is separated from the fixed contact 24, so even if the operator 80 is touched, it does not turn off immediately. Therefore, the contact between the movable contact 42 and the fixed contact 24 may be caused by light contact with the operator 80 or vibration.
There is no risk of turning ON or OFF, causing an arc to fly between both contacts, causing contact wear, and reducing durability.

Further, the total length of the reversible drive section 41 from the engagement end 44 of the movable contactor 40 is formed to be short, and the reversal drive section 41 engages with the reversal drive section 32 provided at the lower part of the converter 30 from below. Since it is formed like this, it becomes possible to take a large blocking distance.

Furthermore, in this embodiment, the support piece 50 is inserted into the inner bottom of the case body 20 to pivotally support the engagement end 44 of the movable contact 40, and is elastically deformed downward and back and forth in the reversal direction. However, the amount of elastic deformation downward is large, and the amount of elastic deformation forward and backward in the reversal direction is allowed to be small.

As described above, the engagement end 44 provided at the lower end of the movable contact 40 provided with the movable contact 42 and the engagement end 44 disposed at the inner bottom of the case body 20 are pivotally supported and Support piece 50 that elastically deforms to
The movable contact 40 is connected to the connecting terminal portion 23 by the connecting portion 53 provided through the bent portion 52 of the support piece 50, and the movable contact 40 is connected to the reversing drive portion 32 provided on the converter 30. The movable contact 42 of the movable contact 40 is opposed to the fixed contact 24 while supporting the reversible driving part 41 provided on the upper part of the mating end 44 .

Therefore, the reversal drive section 32 of the movable contactor 40 provided in the converter 30 is connected to the reversal operation axis 31 of the converter 30.
Move on an arc centered on . In addition, the movable contact 4
The inverted drive unit 41 of 0 is inverted on an arc around the pivot point 51 . Inversion drive section 32 and inversion drive section 4
1, the supporting piece 50 of the pivot point 51
By elastically deforming downward, the fixed contact 24 and the movable contact 42 slide to open and close. Since the movable contact 42 opens and closes while sliding with respect to the fixed contact 24, the occurrence of arcing can be reduced, contact welding when the switch is opened and closed can be prevented, and the life of the switch can be extended.

Additionally, a lid retaining plate 2 is used as a means for fixing the case body 20 and the upper lid 21 attached to the case body 20.
2, a buffer material 90 is inserted and fixed between the upper lid 21 and the lid stopper plate 22 to reduce the sound of the reversing operation of the operator 80. By inserting and fixing the cushioning material 90 between the upper cover 21 and the cover stopper plate 22 in this manner, it is possible to reduce the reversing operation noise caused by the impact when opening and closing the switch.

Next, the mechanism of the light emitting display section will be explained.

The switch with an indicator light according to this embodiment is provided on the converter 30, and the engaging end 4 of the movable contact 40
An operator 80 is installed between the reversing drive unit 32 that operates to open and close 4.
a light-emitting display body 60 that displays the open or closed state of a switch mechanism that opens and closes the fixed contact 24 and the movable contact 42 by the operation of , the transparent body 35
A protrusion 36 is provided at the end of the switch, and the protrusion 36 is inserted through and exposed on the surface of the operator 80 to display both the closed state and/or open state of the switch and the opening/closing operation direction.

As described above, since the reversing drive part 32 of the movable contact 40 provided at the lower part of the converter 30 is provided hanging down from the side wall of the converter 30 on both sides of the movable contact 42, there is no air inside the converter 30. It is possible to incorporate a light-emitting display, and it is possible to make almost the entire surface of the operator 80 bright, or to make the protrusion 36 of the transparent body 35 bright. In addition to the light emitting display 60, the light emitting display also includes a first fixed resistor 67, a second fixed resistor 69, and the like. The transparent body 35 is formed of a colorless transparent body or a colored transparent synthetic resin. In this embodiment, the upper surface of the light transmitting body 35 is formed with a sawtooth cross-sectional surface for reflecting light and concentrating the light on the protrusion 36, so that the light from the light emitting display body 60 is projected. Part 3
By lighting up the light-emitting display body 60 built into the converter 30, the protrusion 36 of the transparent body 35 fitted and exposed on the surface of the operator 80 can be highlighted. It is possible to make it brighter.

The light emitting display body 60 is attached to the holding portion 62 of the support body 61.
is held in The support body 61 is provided with a hole 63 through which the reversing drive portion 32 is inserted, and a sliding contact piece 64 is provided on the side of the insertion hole 63, and the sliding contact piece 64 extends from the connection terminal portion 23. The converter 30 comes into sliding contact with the provided contact spring 71 near the reversing operation axis 31 of the converter 30 . Therefore, since the light-emitting display 60 is connected via the contact spring 71 and the sliding contact piece 64 and is held on the support 61, vibrations generated by repeated opening and closing operations are caused by the lead wires of the light-emitting display 60. This eliminates drawbacks such as cutting, and extends the lifespan.

FIG. 7 is a plan view of the main part of the second embodiment, and FIG. 8 is a circuit diagram thereof. In the second embodiment, the support 61 has a plurality of conductor parts 65 embedded inside the support 61 and a connection part 66 between the light emitting display 60 and the support 61 .
, a connecting portion 68 of the first fixed resistor 67 connected in series to the light emitting display 60 , and an insertion hole 63 of the reversing drive portion 32 formed integrally with the conductor portion 65 .
It consists of a sliding contact piece 64 that is bent on the side of the display member 60, and a holding portion 62 that holds the light emitting display member 60. The switch with an indicator light according to the second embodiment is
Can be used as a position display switch (guide switch) whose lamp lights up when it is OFF.
The open state of the switch can be displayed.

In addition, the switch with indicator light of the third embodiment shown in the circuit diagram of Fig. 9 can be used as a confirmation display switch (check switch) in which the lamp lights up when a switch such as a gate light is turned on. The status can be displayed.

Furthermore, FIG. 10 is a plan view of the main part of the fourth embodiment, FIG. 11 is a bottom view of the same, and FIG. 12 is a side view of the same.
FIG. 13 is the same circuit diagram.

In the switch with indicator light of the fourth embodiment, the support body 61 has a plurality of conductor parts 65 embedded inside the support body 61, a connecting part 66 with the light emitting display body 60, and a connection part 66 connected to the light emitting display body 60 in series. 1st connected
a connecting portion 68 of the fixed resistor 67, a connecting portion 70 of the second fixed resistor 69 connected in parallel to the series connection circuit of the first fixed resistor 67 and the light emitting display 60, and the conductor. It consists of a sliding contact piece 64 that is integrally formed with the part 65 and bent at the side of the insertion hole 63 of the reversing drive part 32, and a holding part 62 that holds the light emitting display body 60, as shown in FIG. Form a street schematic.

The switch with indicator light of the fourth embodiment can be used as a position indicating three-way switch installed at the top and bottom of stairs, etc., and can indicate the open state of the switch.

[Effect of the invention] Since the present invention is configured as described above,
It has the following effects.

First, the operator can be formed to be approximately the same size as the boss of the large rectangular interconnection wiring device, and even if the operator is made larger in this way, the operation of the switch or the switch with an indicator light is good and reliable. be. Furthermore, since the operator can be made larger, the switch has the effect of making the design more luxurious.

Second, since the supporting piece, the bent part, the connecting part, and the elastic piece are elastically deformed, breakage due to bending fatigue can be prevented, and the life of the switch can be significantly extended.

Thirdly, it is easy to assemble and the switch can be opened and closed reliably.

Fourthly, when the switch is turned on, an overcurrent flows and an arc occurs, which causes the contacts to weld and prevent the switch from reversing, making it impossible to open the contacts. This has the effect of improving durability and reliability and also being able to reliably open the contacts. In particular, since the movable contact opens and closes while sliding with respect to the fixed contact, it is possible to prevent the contacts from welding when the switch is opened and closed, resulting in an effect that the life of the switch can be extended.

Fifth, by inserting and fixing the cushioning material between the top cover and the cover stop plate, it is possible to reduce the reversing operation noise caused by the impact when opening and closing the switch.

Sixthly, it is possible to make the entire surface of the operator brighter, and also to make the protruding portion of the transparent body noticeably brighter.

Seventhly, since the light-emitting display is held via the holding part provided on the support, vibration of the light-emitting display and the like can be prevented and the life of the light-emitting display can be extended.

Eighth, the support for the light-emitting display of the switch with indicator light according to the present invention can be used as a position display switch (guide switch), a confirmation display switch (check switch), or a 3-way position display switch. It has the effect that

[Brief explanation of the drawing]

1 is a front view of a first embodiment of a switch according to the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a sectional view of the main part of FIG. 2, and FIG. 4 is a line A--A in FIG. A-line sectional view,
Fig. 5 is an exploded perspective view of the main parts, Fig. 6 is a partially cutaway front view of the first embodiment, Fig. 7 is a plan view of the main parts of the second embodiment, Fig. 8 is the same circuit diagram, 9 is a circuit diagram of the third embodiment, FIG. 10 is a plan view of the main part of the fourth embodiment, FIG. 11 is a bottom view of the same, and FIG. 12 is a side view of the same.
FIG. 13 is the same circuit diagram. 20...Case body, 21...Top lid, 22...
Lid stop plate, 23... Connection terminal portion, 24... Fixed contact, 29... Mounting shaft, 30... Converter, 31...
Reversing operation axis, 32... Reversing drive section, 33... Groove, 35... Transparent body, 36... Projection, 40...
Movable contact, 41... Reversed drive part, 42... Movable contact, 43... Notch, 44... Engaging end, 5
0...Support piece, 51...Pivot point, 52...Bending portion, 53...Connecting portion, 54...Elastic piece, 60...
Light-emitting display body, 61... support body, 62... holding part,
63...Through hole, 64...Sliding contact piece, 65...Conductor part, 66...Connection part, 67...First fixed resistor, 68...Connection part, 69...Second fixed resistor , 70... Connection portion, 71... Contact spring, 80...
...Operator, 81... Mounting leg, 90... Cushioning material.

Claims (1)

[Scope of Claims] 1. A switch mechanism and a connecting terminal portion for opening and closing a fixed contact and a movable contact by operating an operator pivotally supported on the top lid and a connecting terminal section are housed in a container body formed by a case body and a top lid, A mounting shaft provided on a top lid attached to the main body, a mounting leg provided on an operator that is reversibly and removably pivoted on the mounting shaft, and a shaft inserted into the top lid from below. A converter is supported and performs a reversing operation integrally with the reversing operation of the operator, and the reversing axis of the converter and the reversing axis of the operator are provided on the same axis, and the operator is connected to a large rectangular interconnection wiring device. A switch characterized by being formed to almost the same size as the boss. 2. A reversing drive section for the movable contact provided at the bottom of the converter and an engagement end provided at the bottom of the case body, which pivotally supports the movable contact and elastically deforms downward. A support piece, a connection part provided from the lower end of one of the support pieces via a bent part and connected to a connection terminal part, and an engagement end of a movable contact with a reversal drive part provided on the converter. 2. The switch according to claim 1, further comprising a reversible drive portion provided at the other end of the switch. 3. The mounting shaft of the operating element provided on the upper lid is provided to protrude inward from the fitting hole of the converter provided on the upper lid, and is fitted into and supported by the upper lid from below so as to perform the reversing operation of the operating element. Any one of claims 1 and 2, characterized in that the reversing operation axis of the converter that performs an integral reversing operation is aligned with the same axis as the mounting axis and is expanded downward. Switch mentioned in section. 4. The supporting piece is formed into a substantially M-shape, and includes a connecting portion connected to a connecting terminal portion provided from one lower end of the supporting piece via a bent portion, and a connecting portion connected to the connecting terminal portion provided from the other lower end of the supporting piece through a bent portion. 3. The switch according to claim 2, wherein the switch is formed of an elastic piece that is folded back in the direction of the connecting portion and comes into elastic contact with the inner bottom of the case body. 5. The support piece is inserted into the inner bottom of the case body and pivotally supports the engagement end of the movable contact, and is elastically deformed downward and back and forth in the reversal direction, and the amount of downward elastic deformation is large; The switch according to any one of claims 2 to 4, characterized in that the switch is formed so that a slight amount of elastic deformation in the reverse direction is allowed. 6. As a means for fixing the case body and the upper lid attached to the case body, a lid stopper plate is used to connect the two, and a cushioning material is inserted between the upper lid and the lid stopper plate to reduce the sound of the reversing operation of the operator. 6. The switch according to claim 1, wherein the switch is fixed. 7 A switch mechanism and a connecting terminal section, which open and close fixed contacts and movable contacts by operating an operator pivotally supported on the upper lid, are housed in the container body formed by the case body and the upper lid, and are attached to the case body. A mounting shaft provided on the upper lid, a mounting leg provided on the operator which is rotatably and removably supported on the mounting shaft, and a mounting leg provided on the operator which is fitted into the upper lid from below and is pivotally supported. A converter that performs a reversing operation integrally with the reversing operation, and the reversing operation axis of the converter and the reversing operation axis of the operator are provided on the same axis, and the operator is approximately the same size as the boss of the large rectangular interconnection wiring device. Formed into a
Displaying either the open or closed state of a switch mechanism that opens and closes the fixed contact and the movable contact by operating an operator between the reversing drive parts that open and close the engaging ends of the movable contacts provided on the converter. A light emitting display body;
A transparent body provided between the operator and the switch; a protrusion provided at the end of the transparent body; and the protrusion is inserted into and exposed on the surface of the operator to display the closed state of the switch. Or a switch with an indicator light, which is characterized by having both an open state display and an opening/closing operation direction display. 8 A support to which a light-emitting display, etc. is attached, which has an insertion hole for the reversal drive part between the reversal drive parts provided on the operator, and a support on the side of the insertion hole for the reversal drive part of the support. , a display according to claim 7, characterized in that a sliding contact piece connected to a light emitting display or the like that slides into contact with the contact spring near the rotation axis of the converter of the contact spring extended from the connection terminal portion is provided. Switch with light. 9 The support body includes a plurality of conductor parts embedded inside the support body, a connection part to the light emitting display, a connection part to the first fixed resistor directly connected to the light emission display, and the conductor part. Claim 8, comprising: a sliding contact piece bent at the side of the insertion hole of the reversing drive unit formed integrally with the reversing drive unit; and a holding unit for holding the light emitting display. Switch with indicator light as described in section. 10 The support body is provided with a connection portion for a second fixed resistor connected in parallel to a circuit of the first fixed resistor connected in series with the light emitting display. A switch with an indicator light according to any one of item 8 or 9.