JPS6219011B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a stage dimmer.

In multi-lamp lighting equipment, when performing step-by-step dimming by mutually switching between series and parallel lights, a double-edged knife switch type switching means has traditionally been used, but pendant-type and ceiling-type fixtures have no built-in switching means due to their operating structure. was impossible.

Therefore, an object of the present invention is to provide a staged light control device that can be incorporated into pendant and ceiling type multi-lamp lighting fixtures.

An embodiment of this invention is shown in FIG. That is, in this stage dimmer, a center shaft 2 is fixed at the center of a switch body 1, a rotary insulator 3, which is a rotary plate, and a handle 4 are loosely fitted to the shaft 2, and the rotary insulator 3 and the handle 4 are loosely fitted to the shaft 2.
A mechanism consisting of a reversal prevention step (not shown) and a coil spring (not shown) is installed between the handle 4 and the handle 4 so that only the handle 4 returns to its original state. On the other hand, there are 8 fixed contacts 5 on the switch body 1.
....... are arranged in a circle at equal intervals, and the rotary insulator 3 has arc-shaped movable contacts 6a and 6b having a length that can connect two of the fixed contacts 5.....
They are placed at 180° intervals.

Furthermore, a pull ring 7 is attached to the handle 4 and extends outside through a hole 8 in the switch body 1, thereby forming a pull switch. Now, when the pull ring 7 is pulled, the handle 4 rotates and the rotary insulator 3 is rotated, and the state shown by the solid line in FIG.
The direction of rotation is sequentially switched so as to short-circuit the adjacent ones of ………….

FIG. 2 shows a switching control circuit for a first lamp L1, a _second lamp _L2 , and a miniature lamp M, which is an example of two incandescent lamps using this pull switch. In the figure, E is the power supply, and S1 to S8 are the first fixed contacts S1 to the eighth of the fixed contacts 5.
The fixed contact S8 is shown. Figures 3 to 6
The figure shows the circuit status at each stage of the pull switch. That is, in FIG. 3, the first lamp L1 and the second lamp are A state in which the lamp L2 is turned on in parallel and the small lamp M is turned off,
Figure 4 shows the second fixed contact S2 - the third fixed contact S
3 is short-circuited and the sixth fixed contact S6-seventh
By short-circuiting the fixed contact S7 of All lights are off. The above circuit configuration allows switching between series and parallel, thereby allowing stepwise dimming. Currently, electronic dimming is the mainstream method of dimming, but it is quite expensive because it incorporates an electronic dimming device. A four-lamp system can be achieved by connecting two lamps in parallel to the first lamp L1 and connecting two lamps in parallel to the second lamp L2. For a three-lamp system, the overall balance can be achieved by connecting two lamps in parallel to the first lamp L1, and attaching a lamp with an appropriate load to the second lamp L2. For even numbers of 2 or more lights, each is the first lamp L1
and half are connected in parallel to the second lamp L2,
For odd numbers, the lamps L1 and L2 are connected in parallel, but balance is achieved by increasing the lamp load on the side with one more lamp than on the side with fewer lamps.

According to the stage dimmer, the first to eighth fixed contacts are sequentially arranged at equal intervals on the circumference and are movable to symmetrical positions of the rotary insulator with the center position of the circumference as the center of rotation. Contacts are provided, and each movable contact short-circuits adjacent ones of the first to eighth fixed contacts, and the rotary insulator is connected to each other at each interval between the first to eighth fixed contacts. a pull switch to rotate the switch; a power supply having one end connected to the first fixed contact and the other ends of the third fixed contact and the sixth fixed contact; and the first fixed contact and the fourth fixed contact.
a small lamp connected between the fixed contacts of the lamp, a first lamp connected between the first fixed contact and the fifth fixed contact, and the second fixed contact and the fifth fixed contact. Since the second lamp is connected between the two lamps, the following effects can be obtained.

In other words, it is possible to compactly switch between series and parallel and control miniature lamps, and it is possible to easily achieve staged dimming, and it has the advantage that it can be easily applied to multi-lamp lighting fixtures such as bending and ceiling types.

As described above, the switch of the present invention includes a large number of fixed contacts arranged in a circular shape at regular intervals, and two contacts that contact two of these fixed contacts to conduct each other.
Since it is equipped with a set of movable contacts, it has the effect that a series-parallel switching circuit can be created compactly.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of a pull switch according to an embodiment of the present invention, FIG. 2 is a lighting circuit diagram, and FIGS. 3 to 6 are diagrams of its operating state. 3... Rotary insulator, 6a, 6b... Movable contact, S1 to S8... First fixed contact to eighth fixed contact, E... Power supply, M... Small lamp, L1...
...first lamp, L2...second lamp.

Claims (1)

[Claims] 1. First to eighth fixed contacts are sequentially arranged at equal intervals on the circumference, and movable contacts are provided at symmetrical positions of the rotary insulator with the center position of the circumference as the center of rotation. According to the first
a pull switch that short-circuits adjacent ones of the fixed contacts to the eighth fixed contact and rotates the rotary insulator for every interval between adjacent fixed contacts of the first to eighth fixed contacts; a power supply having one end connected to the contact and the other end connected to the third fixed contact and the sixth fixed contact; a miniature lamp connected between the first fixed contact and the fourth fixed contact; A first lamp connected between the first fixed contact and the fifth fixed contact, and a second lamp connected between the second fixed contact and the fifth fixed contact. Stage dimmer.