JPS644187Y2 - - Google Patents

Description

[Detailed explanation of the idea] 〔Technical field〕 This invention relates to a pull switch.

[Background technology]

For example, as a conventional pull switch,
-12071 and JP-A-50-15074, there were some in which a plurality of contact groups were arranged in parallel in the axial direction. However, when the low-voltage side contact group and the high-voltage side contact group are arranged side by side in the axial direction of the rotating part, the axial dimension of the rotating part increases to ensure insulation, which has the disadvantage of increasing the overall size. It was hot.

[Purpose of invention]

The purpose of this invention is to downsize the pull switch.

[Disclosure of invention]

This invention consists of a mandrel, a rotating part with a ratchet mechanism that is rotatably passed through the mandrel, and has a high voltage side contact group and a low voltage side contact group arranged side by side at a predetermined insulating interval in the axial direction, and the mandrel. and a handle with a switch operation part, which is passed through the rotary part, is disposed on the low-pressure side contact group side of the rotating part, and is engaged with the ratchet mechanism part through an insulating plate. By placing the handle on the low voltage side, the insulation distance between the handle and the low voltage side contact group, that is, the thickness of the insulating plate, can be made smaller than when the handle is placed on the high voltage side, and the size can be reduced accordingly. Moreover, even in the unlikely event that someone touches the pull ring and receives an electric shock, it is safe because the voltage is low.

An embodiment of this invention is shown in FIGS. 1 and 2. That is, in this pull switch, as shown in FIG. 2, a mandrel 2 is installed within a body 1, a rotating part 3 is passed through the mandrel 2, and a handle 4 is located on the low pressure side of the rotating part 3. The rotating part 3 has a plurality of cams 6a to 6d with insulating plates 5a to 5d attached to them, which are respectively passed through the shaft 2 and engaged with each other. High voltage movable contacts 7a and 7b are provided, and low voltage movable contacts 8a and 8b are provided at arbitrary positions on the circumferential surface of the ratchet claw cams 6c and 6d, and an insulating plate is provided to ensure an insulating distance between the low voltage side and the high voltage side. The thickness H ₁ of the cam 5c is increased, and a handle 4 is engaged with the outside of the cam 6d via an insulating plate 9, and a switch operation part 10, which is an example of a pull ring, is attached to the handle 4. Further, a torsion/compression coil spring 11 is passed through the mandrel 2 to press the handle 4 against the cam 6d, and one end is engaged with the handle 4, and the other end is locked inside the body 1. On the other hand, fixed contacts 12 correspond to the movable contacts 7a, 7b, 8a, 8b of the body 1.
a to 12d are provided.

This pull switch is one of the switch operation parts 10.
The handle 4 rotates by a predetermined amount by pulling the button twice.
At this time, the spring 11 is twisted, so that when the switch operation part 10 is released, the handle 4 returns to its rotational state. In this way, when the handle 4 rotates in one direction, each of the cams 6a to 6d rotates together in the engaging direction, and each of the fixed contacts 12a to 12d
The movable contacts 7a, 7b, 8a, 8b move toward and away from each other. Further, when the handle 4 is rotated in the opposite direction, the cams 6a to 6d are in a direction in which they do not engage, and therefore remain in a held state without rotating. In this way, each time the switch operation component 10 is pulled, a switch on or off operation is performed.

FIG. 1 shows an example in which this pull switch is applied to a fluorescent lamp lighting circuit. In the figure, E is a commercial power supply,
Q ₁ is a miniature bulb, I is an inverter circuit, T is an oscillation transformer, L is a dimming coil, C is a noise prevention capacitor, Q ₂ and Q ₃ are fluorescent lamps, SW ₁ is a low voltage side switch part of a pull switch, SW ₂ is the high pressure side switch part. Pull switch switch operation parts 10
When pulled, the low-voltage side switch SW ₁ becomes open, and when the switch operating part 10 is pulled next, the inverter circuit I operates as shown in the figure, and the high-voltage switch SW ₂ is placed in the position shown in the figure. Therefore, the fluorescent lamps Q ₂ and Q ₃ are fully lit. Further, when the switch operation part 10 is pulled, the high voltage side switch part SW ₂ switches to the side of the noise prevention capacitor C, and the fluorescent lamps Q ₂ and Q ₃ are turned on via the dimming coil L, resulting in step dimming. . Next, when the switch operation part 10 is pulled, the low-pressure side switch part SW ₁ is switched to the small bulb Q ₁ side, the fluorescent lamps Q ₂ and Q ₃ are turned off, and the small bulb Q ₁ is turned on. Further, when the switch operation part 10 is pulled, the low-pressure side switch part SW ₁ is turned off in the open state, and at the same time, the high-pressure side switch part SW ₂ returns to the side of the fluorescent lamps Q ₂ and Q ₃ .
One step is completed.

Because of this configuration, in this pull switch, the thickness H ₂ of the insulating plate 9 can be made smaller than when the handle 4 is located on the high voltage contact side, and the body 1 can be made smaller accordingly. That is,
The thickness _H1 of the insulating plate is the same regardless of whether the handle 4 is located on the high pressure side or the low pressure side.
This is because when the handle 4 is located on the high voltage side, the thickness must be greater than the thickness _H2 of the insulating plate 9 to ensure insulation, and the body 1 therefore becomes larger. Furthermore, by positioning the handle 4 on the low pressure side, even if a contact accident occurs with the switch operation parts, the pressure is low, so there is high safety against electric shock.

[Effect of idea]

As described above, according to the pull switch of this invention, since the handle is provided on the low voltage side contact group side, the thickness of the insulating plate between the handle and the low voltage side contact group can be reduced.
Since the handle can be made smaller compared to the case where the handle is provided on the high pressure side contact group side, miniaturization can be achieved. Furthermore, even if someone were to touch the switch operating parts and receive an electric shock due to an accident, the low voltage would ensure safety.

[Brief explanation of the drawing]

FIG. 1 is a lighting circuit diagram to which an embodiment of this invention is applied, and FIG. 2 is a sectional view of a pull switch. 1...Body, 2...Mandrel, 3...Rotating part, 4
...Handle, 5a to 5d, 9...Insulation plate, 6a
~6d...Cam, 7a, 7b...High pressure side contact, 8
a, 8b...Low pressure side contact, 10...Switch operation parts.

Claims (1)

[Scope of utility model registration request] a rotating part with a ratchet mechanism, which is rotatably passed through the mandrel and has a high voltage side contact group and a low voltage side contact group arranged side by side at a predetermined insulating interval in the axial direction; A pull switch comprising: a handle with a switch operating part disposed on the low voltage side contact group side of the rotating part and engaged with the ratchet mechanism part through an insulating plate.