JPH0231476B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a lighting device in which a plurality of lamps can be arbitrarily switched between a full lighting mode and a thinning lighting mode.

(Prior Art) For example, as shown in FIG. 1, a multi-light lighting device includes a high-output annular fluorescent lamp 1, a low-output annular fluorescent lamp 2, and a low-output incandescent lamp 3, a so-called baby light. ing. In addition, 4 in the figure is the chassis,
5 indicates shade. The circuit of the illumination device is configured such that by operating a pull switch (not shown), two fluorescent lamps are turned on, one fluorescent lamp is turned on, the baby light is turned on, and the light is turned off.

Further, in a chandelier type multi-lamp lighting device, even in the case of one having three lamps, the circuit is configured so that it can be switched between three lamps on, one lamp on, and off.

Furthermore, a circuit for a lighting device as described in Japanese Utility Model Application Publication No. 48-28273 has been proposed. This proposed circuit can be used in lighting devices equipped with fluorescent lamps and incandescent lamps to: a. Simultaneous lighting of fluorescent lamps and incandescent lamps, b. Lighting of only incandescent lamps by direct application of power supply voltage, and c. This relates to a dimming switching circuit that enables dimmed lighting and switching of incandescent lamps only by applying power supply voltage through a ballast.

(Problem to be Solved by the Invention) In the multi-lamp lighting device shown in FIG. 1, which of the fluorescent lamps 1 and 2 is lit when one lamp is lit is fixed, However, when one lamp is turned on, it is not possible to select either the high-output fluorescent lamp 1 or the low-output fluorescent lamp 2 to achieve the desired illuminance. In other words, in general, when one lamp is turned on, the low output fluorescent lamp 2 is turned on, and depending on the usage condition, it may be too bright when two lamps are turned on, or too dark when one lamp is turned on.

In addition, the circuit is fixed in the chandelier type lighting device for multiple lights, so it is possible to turn on 3 lights,
The user cannot arbitrarily set the order in which the two lights are turned on and then turned off, resulting in the same inconvenience in use as described above.

Furthermore, in the case of the lighting equipment circuit described in Japanese Utility Model Publication No. 48-28273, as is clear from the switching steps a to d above, incandescent lamps are dimmed and turned on to the same brightness as a night light. However, it is not possible to respond to the user's delicate requests for switching illuminance.

However, with the current pursuit of appropriate lighting, there has been a demand for lighting devices that can change the illuminance in small increments.

The present invention was made based on the above circumstances, and
To provide an illumination device which can select the necessary illuminance when changing from all lights on to a lighting state where the illuminance is lowered, and which can be configured without using special dimming means.

[Structure of the Invention] (Means for Solving the Problems) The lighting device of the present invention includes a mode changeover switch that switches these lamps between a mode in which all the lamps are turned on and a mode in which a reduced number of lamps are turned on, and each of the above-mentioned lamps. The number of lamps to be lit or the lamps to be lit in the lighting mode in which the number of lamps is reduced by the mode selection switch, which is provided between the lamp and the power source in series with a terminal for a lighting mode in which the number of lamps is reduced by the mode selection switch. and a lamp changeover switch for switching the lamp to any desired lamp.

(Function) In the lighting device of the present invention having the above configuration, the rating or the number of lamps to be lit can be changed by operating the lamp changeover switch while the mode switching device is switching to a lighting mode in which the number of lights to be lit is reduced. One of the circuits is selected to obtain the required illuminance. In the full lighting mode, all lamps are lit regardless of the position of the lamp changeover switch.

(Example) Hereinafter, details of the present invention will be explained with reference to an example shown in the drawings. FIG. 2 is a circuit diagram of a basic embodiment of the present invention. This embodiment is an example in which the present invention is applied to a lighting device using incandescent light bulbs with two different outputs. In Fig. 2, one terminal of the power source E is connected to a movable contact _M1 of a two-pole two-way changeover switch _SW1 , which is a mode changeover switch.
In the first position of M ₁ , the movable contact M ₁ connects the power source E.
Fixed contacts C ₁ and C ₂ connected to the high output lamp
L ₁ and is connected to the other terminal of the power source E via a small output lamp L ₂ . That is, fixed contacts C ₁ , C ₂
is the terminal for full lighting mode.

In addition, the fixed contact C ₃ connected to the power source E by the movable contact M ₁ in the second position of the movable contact M ₁ is
The movable contact of the single-pole two _- way changeover switch SW ₂ , which is a lamp changeover switch, has the fixed contacts C ₄ and C ₅ connected to the fixed contacts C ₁ and C ₂ of the lamps L 1 and L 2 _, respectively.
Connected to _M2 . That is, the fixed contact
_C3 is a terminal for lighting mode with reduced number of lights.

In the lighting device of the present invention having the above configuration, the movable contact _M1 of _the mode changeover switch _SW1 is in the first position, that is, _the position _shown in FIG. When connected to one terminal, lamps L ₁ and L ₂ light up.
In addition, if the movable contact _M2 of the lamp changeover switch _SW2 is set to the fixed contact _C4 side, the movable contact _M1 of the mode changeover switch _SW1 is set to the second position and comes into contact with the fixed contact _C3 to switch to one lamp lighting. At this time, the high output lamp _L1 is lit. In addition, the movable contact _M2
If fixed contact _C5 is set to the side, small output lamp _L2 will be lit.

As described above, in the present invention, it is possible to arbitrarily select whether to turn on a high or low output lamp when one lamp is turned on, so unlike conventional lighting devices, when one lamp is turned on, it is too dark and inconvenient. I don't feel anything like that.

Although the above embodiment is an example of a multi-lamp lighting device using incandescent light bulbs, the present invention can also be applied to a lighting device equipped with two annular fluorescent lamps with two different sizes of output as shown in FIG. Can be applied. In this case, lighting circuits for fluorescent lamps 1 and ₂ may be connected in place of lamps L ₁ and L 2 in FIG. 2. Therefore, the lamp selection switch is not used all the time, and is a semi-fixed switch that is rarely operated after selecting the fluorescent lamp that is turned on when one lamp is turned on. It can be provided at a suitable location on the lower surface of the chassis 4 of the lighting device.

FIG. 3, in which the same parts as in FIG. 2 are denoted by the same reference numerals, is a circuit diagram of an embodiment in which the present invention is applied to a chandelier-type multiple-lamp lighting device using three fluorescent lamps. In this embodiment, the fixed contact _C4 of the lamp changeover switch _SW2 is connected to the first and second contacts provided in parallel.
The fixed contact C 5 is connected to the other terminal of the power source E via the lighting circuits L ₁ ′ and L ₂ ′ for the third fluorescent lamp, and the fixed contact C ₅ is connected to the other terminal of the power source E via the lighting circuit L ₃ ′ for the third fluorescent lamp. connected to each terminal.

In the embodiment with the above configuration, the movable contact M _{1 of} the mode changeover switch SW _{1 is} in the first position, that is _, the position shown in FIG. When connected to , all lighting circuits L ₁ ′ to L ₃ ′ are energized,
All three fluorescent lamps are turned on. In addition, the movable contact M ₂ of the lamp changeover switch SW ₂ is connected to the fixed contact C ₄ .
When the movable contact M ₁ of the mode changeover switch SW ₁ is brought into contact with the fixed contact C ₃ in the second position, the lighting circuits L ₁ ′ and L ₂ ′ are energized, and the first,
When the second fluorescent lamp is lit and the movable contact M ₂ is placed on the fixed contact C ₅ side, the lighting circuit L ₃ ' is energized and only the third fluorescent lamp is lit.

As described above, according to this embodiment, it is possible to arbitrarily switch between three lamps, two lamps, three lamps, and one lamp lit, so that no problems occur in terms of illuminance.

Although the above embodiment is an example in which the present invention is applied to a chandelier type lighting device using a fluorescent lamp, the present invention can also be applied to one using an incandescent lamp. In that case, the lighting circuit shown in Figure 3
Incandescent light bulbs may be connected in place of L ₁ ′ to L ₃ ′.

The present invention is not limited to the above embodiments. That is, the number of lamps is not limited to three, but may be four or more.

[Effect of the invention] As is clear from the above, the lighting device of the present invention has the following effects:
A plurality of lamps are switched to each lighting mode, such as full lighting and reduced number of lights, by switching a mode switching switch, and the number of lights of the mode switching switch is connected between each lamp and the power source. Since a lamp selection switch is provided in series with the terminal for the lighting mode with a reduced value, any number of lamps or lamps of any rating can be selected as required by operating this lamp selection switch. . In other words, it is possible to arbitrarily obtain an illuminance that is intermediate between lighting all the lights and lighting with the least number of lights. Moreover, since it is constructed only by an arrangement of switches and does not require any special dimming means, it can be supplied at low cost.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of an example of a conventional multi-light lighting device, FIG. 2 is a circuit diagram of one embodiment of the present invention, and FIG. 3 is a circuit diagram of another embodiment. E...Power supply, SW ₁ , SW ₂ ...Selector switch,
C ₁ ~ C ₅ ... Fixed contact, L ₁ , L ₂ ... Lamp, L ₁ ′,
L ₃ ′...Lighting circuit.

Claims (1)

[Scope of Claims] 1. A plurality of lamps, a mode changeover switch for switching between a mode in which all of the lamps are turned on and a mode in which a reduced number of lamps are turned on, and a mode changeover switch between each of the lamps and the power supply; A lamp switch that is provided in series with a terminal for a lighting mode in which the number of lights is reduced on a changeover switch, and that switches the number of lights to be lit or the lamps to be lit in the lighting mode in which the number of lights is reduced by the mode changeover switch to an arbitrary lamp. A lighting device characterized by comprising a switch and.