JPS6230727Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a fluorescent lamp lighting device that applies high voltage pulses generated by a high voltage generator to the outer peripheral side of the fluorescent lamp to light the fluorescent lamp. The object of the present invention is to provide a fluorescent lamp lighting device that can easily convert a glow lighting type fluorescent lamp fixture, in which a glow lighting tube 6 is connected between the non-power side terminals of filaments 2 and 3, to an instant lighting type. be.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is an external perspective view of an embodiment of the fluorescent lamp lighting device of the present invention. The lighting device of the present invention includes an insulating case 11 which has a conductive plate 12 on the outer circumferential surface or the inner circumferential surface, has a high voltage generator described below built therein, and has its high voltage terminal connected to the conductive plate 12; The cap 14 is connected to one end of the input power supply lead wire 13 of the high voltage generator and is insertable into the socket of the glow lamp tube.

In order to use this lighting device in a fluorescent lamp fixture using a glow tube and convert it to an instant lighting type fluorescent lamp fixture, the conductive plate 12 of the insulating case 11 is installed close to the fluorescent lamp, and the base 14 Insert it into the glow lamp tube socket. Fig. 3 is an external perspective view of a fluorescent lamp fixture incorporating the lighting device of the present invention, and Fig. 4 shows the circuit configuration in that case. The same reference numerals are given. In these figures, reference numeral 1 denotes a fluorescent lamp, which is fixed to a base plate 10 with a lamp socket 9. 4 is a stabilizer connected between the power connection plug 5 and the filament 2, 7 is a switch, and 8 is a noise prevention capacitor. Reference numeral 15 denotes a socket for inserting a glow lighting tube, into which the base 14 of the lighting device of the present invention shown in FIG. 2 is inserted. Insulation case 1
1 is fixed to a base plate 10 such that a conductive plate 12 provided on its outer peripheral surface is close to the side surface of the fluorescent lamp 1.

The high voltage generator 16 housed in the insulating case 11 includes a high voltage pulse generator circuit 22 composed of a diode 17, a resistor 18, a symmetrical switching element 19, a pulse transformer 20, and a charging/discharging capacitor 21; The preheating circuit 25 includes a symmetrical switching element 23 and a diode 24 connected in parallel to the high-voltage pulse generating circuit.

Next, the operation of the above circuit will be described. When the power plug 5 is connected to a commercial power source and the switch 7 is closed, a half-wave of the power supply frequency, i.e., a forward voltage is applied to the diode 17, the high-voltage pulse generating circuit 22 operates, and the charging/discharging capacitor 21 is charged via the resistor 18. At this time, the preheating circuit 25
When the polarity of the power supply is reversed in the next half wave, the diode 24 becomes forward and a preheating current flows through the filaments 2 and 3 of the fluorescent lamp 1 via the symmetrical switching element 23, preheating the filaments. At this time, the high-voltage pulse generating circuit 22 is in the off state because the voltage across the diode 17 is in the current blocking direction. In this way, the high-voltage pulse generating circuit 2
The high voltage pulse generating circuit 22 charges the charge/discharge capacitor 21 at each half-wave of the AC frequency. When the charging voltage reaches the breakdown voltage _VBO of the symmetrical switching element 19,
The capacitor 21 is instantly discharged, generating a high-voltage pulse in the pulse transformer 20 and applying it to the conductive plate 12. The repeated charging and discharging of the capacitor 21 at this time is
The preheating is controlled by the control circuit 8, and is performed several to several tens of times per second. Therefore, as soon as the preheating of the filaments 2 and 3 reaches a temperature at which the lamp can be turned on, the fluorescent lamp 1 is turned on by the high-voltage pulse voltage that is repeatedly generated in conjunction with the preheating.
After the fluorescent lamp 1 is turned on, the discharge lamp lighting voltage is suppressed to the discharge sustaining voltage Et, so that the symmetrical switching elements 19 and 2 of the high voltage pulse generating circuit 22 and the preheating circuit 25 are turned on.
By selecting the breakdown voltage V _BO of 3 such that Epeak>V _BO >Et with respect to the peak value Epeak of the power supply voltage, the symmetrical switching element does not break down and continues to light stably.

When the lighting device of the present invention is used as described above,
This product can easily convert existing fluorescent lighting fixtures that use glow lighting tubes into instant lighting fixtures, and eliminates lighting failures due to deterioration of glow lighting tubes and the need to replace glow lighting tubes. There are advantages such as no Conversion to the instantaneous lighting method is also extremely simple, as the insulating case is simply attached close to the fluorescent lamp and the cap is inserted into the existing glow socket.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of a conventional glow lighting type fluorescent lamp fixture, Fig. 2 is an external perspective view of an embodiment of the fluorescent lamp lighting device of the present invention, and Fig. 3 is a circuit diagram of a fluorescent lamp lighting device of the present invention. A perspective view of the exterior when it is assembled into a light fixture,
FIG. 4 is its circuit diagram. 1... Fluorescent lamp, 2, 3... Filament, 5...
...Power connection plug, 6...Glow lighting tube, 11...
...Insulating case, 12...Conductive plate, 14...Base,
15... Glow socket, 16... High voltage generator, 17, 24... Diode, 19, 23...
Symmetry switching element, 20...Pulse transformer, 21...Charging/discharging capacitor, 22...High voltage pulse generation circuit, 25...Preheating circuit.

Claims (1)

[Scope of utility model registration request] A conductive plate connected to the high voltage terminal of the high voltage generator is provided on a part of the outer circumferential surface or inner circumferential surface of the insulating case containing the high voltage generator, and a conductive plate connected to the high voltage terminal of the high voltage generator is provided. A fluorescent lamp lighting device consisting of a base that can be inserted into a glow lamp tube socket at one end.