close

Вход

Забыли?

вход по аккаунту

?

DESCRIPTION JPS60189195

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPS60189195
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
flash light emitting apparatus which discharges electric charge of a discharge capacitor to emit
light, and it is possible to emit light continuously. It is well known that a flash discharge light
emitter, which discharges the charge of the capacitor for the discharge of the rice bran paste and
emits light, is used for various applications. The SCR used as a switching element is connected in
series to the flash discharge tube as the light source used for photography, and after discharging
the charge of the discharge capacitor to emit light, light is emitted by the stop F signal from the
photometry circuit. Many are used to stop automatically. On the other hand, due to the spread of
motor drives, automatic weengues, etc., there is also a demand for a device which emits light
continuously following them. Although it was possible to make the light emission follow two to
three times in the above-mentioned general light emitter, continuous light emission was more
difficult. Therefore, a special flash discharge light emitter capable of continuous light emission
has been devised. In the case where this continuous light emission is set to zero potential,
conventionally, two discharge tubes are prepared as seen in, for example, Japanese Patent
Application Laid-Open No. 59-7937, etc., and many of them are made to emit light alternately.
The use of two discharge tubes in this way is certainly suitable for continuous light emission, but
it is uneconomical to use two expensive discharges 7 and Q <-. The present invention has been
made in consideration of the above, and it is an object of the present invention to provide a flash
discharge light emitter capable of continuous light emission as well as normal light emission with
one flash light discharge tube. . In the present invention, a capacitor is connected in parallel to a
switching element connected in series to a flash discharge tube, while a discharge circuit for
discharging the charge of the capacitor is provided. It is characterized in that the discharge and
the operation of the discharge circuit are alternately performed. During normal light emission, as
in the prior art, the operation of the tri-circuit and the on operation of the switching element
18-04-2019
1
connected in series to the discharge tube are synchronized and discharged without the capacitor.
The capacity of this capacitor is smaller than the capacity of the discharging capacitor, and is
usually in the range of one hundredth to several hundredths. Therefore, in the case of continuous
light emission, of course, the amount of light emitted from each light decreases. In FIG. 1 shows
one embodiment, a high voltage power supply (not shown) supplies a voltage of 330 V between
the lines 3.4 through the diode 1 and the power switch 2. A discharge capacitor 5 is connected
between the lines 3.4 and a series circuit of the discharge tube 6 and the 5CR 7 as a switching
element is connected.
A capacitor 8 is connected in parallel to the 5CR 7 via a diode 9. That is, this capacitor 8 is
connected in series to the discharge tube 6 via the diode 9. Connected in parallel to this capacitor
8 is a series circuit of a choke coil 10 and a 5CRII, which constitute a discharge circuit for
discharging the charge. This coil 10 is for oscillating with the capacitor 8 and is for charging the
capacitor 8 in the reverse polarity to that shown in the figure at the time of discharging when 5
CR II is turned on. The trigger circuit for starting the discharge of the discharge tube 6 is, as is
well known, composed of an I · ricker capacitor 12, a trigger transformer 13 and an SCR 14. The
diode 15 connected to the cathode of the discharge tube 6, the commutating capacitor 16 and
the thyristor 17 constitute a known light emission stop F circuit for stopping the discharge of the
discharge tube 6, and from the photometry circuit 1.8 Operate by the output of. The neon tube
19 connected to the line 3 indicates the state of charge of the discharging capacitor 5 as is well
known. The 5CRs 7, 11 and 14 are connected to be turned on by a signal from the control circuit
20 described later. The control circuit 20 is supplied with a voltage of about 6 v from the low
voltage power supply via the line 21. Connected to the line 21 is a transistor 22 whose base is
connected to the cathode of the neon tube 19 so that the control circuit 20 can not output the
output unless the neon tube 19 is lit. A pump 24 is connected to the pJ switch 23 and its output
state is selected by switching the switch. The switching switch 23 is for switching between
normal light emission and continuous light emission. The illustration shows the state of normal
light emission, in which the output (A) of the flip flop 24 is in the L level. A circuit constituted by
three NAND gates is an oscillating circuit 25 and operates to output a rectangular wave when the
output of the flip-flop 24 becomes H level. The period of the output of the oscillation circuit 25 is
changed by the = r variable resistance 26. The output of the flip flop 24 is connected to one input
of a NAND gate I 29 via a resistor 27 and a capacitor 28 which constitute a time constant circuit.
The output (B) of the oscillation circuit 25 is manually input to the other input of this gate. The
time constant of the time constant circuit is set to a value that allows the output of the gate 29 to
change after the time of the pulse IIJ of the oscillation circuit 25 elapses after the output of the
flip flop 24 becomes H level.
Therefore, the output of the gate 29 becomes a waveform delayed in phase from the output of
the oscillation circuit 25 by 1806. The waveforms of these A, B, C and D parts are as shown in
18-04-2019
2
FIG. The output of the oscillator circuit 25 is applied to the base of the transistor 30, and the
output of the gate 29 is connected to the base of the transistor 31. These transistors 30.31 are
both turned on when the L level is reached. The collector of the transistor 30 is connected to the
gate of 5CRII, and the collector of the transistor 31 is connected to the gate I of the 5CR 14 of
the trigger circuit. As mentioned above, since the waveforms at points B and D are shifted by
1806, 5 CR II,! l: 14 is turned on at intersection η−. In addition, a series circuit of a resistor
32.33, a capacitor 34, and a switch 35 is connected between the lines 21 and 4, and the base of
one transistor 36 of the transistor 36.37 connected in Darlington connection is connected to the
connection point of the resistor 32.33. It is connected. The base of the transistor 36 is connected
to the gate of 5 CRI 4 through the diode 38 and the collector of the transistor 37 is connected to
the gate of 5 CR 7. これらのトランジスタ36.37は1′「スイッチ35がオンとなったときの
みオンとさせる。 Real "0 矧 1 作 ま ず First, let's talk about normal single-shot light emission.
The changeover switch 23 is kept in the illustrated state. Therefore, the flip flop 24 is at L level
and the oscillation circuit is at H level. The transistor 30.31 is kept off. When the discharge
capacitor 5 is charged and the neon tube 19 is lit, the light emission is ready. ここでスイッチ
35をオンとするとトランジスタ36.37がオンとなる。 By this on, 5CI (14 and 7 are turned
on. The trigger circuit operates by the SCR 14 to start the discharge tube 6 to discharge. Since
5CR7 is on during this time, the charge of the discharge capacitor 5 is discharged through the
discharge tube 6.5CR7 to emit light. When light is metered by the photometry circuit 18 and
becomes appropriate brightness, an output from the photometry circuit 18 is output to turn on
the thyristor 17 to discharge the commutation capacitor 16 and to stop light emission 1-. When
the discharge capacitor 5 is charged and the neon tube 19 is lit, the same light emission is
possible again. That is, light is emitted each time the switch 35 is turned on. Next, in the case of
continuous light emission, the switching switch 23 is switched vJ reversely to the illustration.
Then, the flip flop 23 is inverted and the point A becomes H level.
Accordingly, the oscillator circuit 25 operates to output the rectangular wave of FIG. 3B. At the
same time, the capacitor 28 of the time constant circuit is charged, and when the output of the
oscillation circuit 25 changes from H level to H level, the output is applied to the gate 29 and the
voltage of the capacitor 28 becomes H level. Invert. After that, since one input of the gate 29
does not change until the output of the flip flop 24 returns to the original state, a waveform
shifted by 180 ° is output according to the output of the oscillation circuit 25 (see FIGS. 3B and
3D). That is, the flip-flop 241 oscillation circuit 25 and the gate 29 including the time constant
circuit constitute another so-called flip-flop. スイッチ35はオ/と4 らないので5CR7がオ
ンとなることはない。 When the point B becomes LL nobel, the transistor 30 is turned on to turn
on 5CRII to discharge the capacitor 8. The discharge of this capacitor is charged by the choke
coil 10 in the opposite polarity to that shown. Next, when the point D becomes L level, the
transistor 31 is turned on to operate the trigger circuit to start the discharge tube 6 to discharge.
Since 5CR7 is off, it discharges through the capacitor 8 and emits light. This light emission only
lasts until the capacitor 8 is charged to the illustrated polarity. Thereafter, since the point B
18-04-2019
3
becomes L level again, the capacitor 8 is discharged, and light is emitted by inversion of the D
point to L level. The repetition of the light emission is continued until the changeover switch 23
is switched. That is, continuous light emission is repeated. In the case of continuous light
emission, as indicated by-, it is a discharge through the capacitor 8, and this capacitor has a
capacity smaller than that of the discharge capacitor 5 by-. While it is possible to emit light
continuously by repetition, the amount of emitted light is naturally small. However, the voltage of
the capacitor 8 becomes about -E port 1- (E: charging voltage of the discharging capacitor) by the
coil 10, and it is charged from that to 10 E volts during discharging. Since the light emission
energy is proportional to the square of the voltage as is well known, it can be a considerable
amount of light. As described above, the normal light emission and continuous light emission can
be performed by the 9J conversion switch 23. Moreover, only one discharge tube is used. 1
Storm 1 FIG. 2 shows another embodiment, in which three of four SCRs are used in the above
embodiment. Those that perform the same operations as those in FIG. 1 are indicated by the
same reference numerals.
In this embodiment, the function of 5CR11 is performed by 5CR7 connected in series to the
discharge tube without using 5CRII of FIG. 1 as shown. One end of the output of flip-flop 40 is
connected to the gate of 5CR14, the other j is connected to the gate of 5CR7, one terminal 42 of
the changeover switch is connected to the input of this flip-flop 4o, and the other end It connects
to 5CR14 via the diode 45, and to the gate of 5CR7 via the diode 45, respectively. A single pulse
is sent to the switch 41 for normal light emission, and a continuous pulse is sent for continuous
light emission. Therefore, when the changeover switch 41 is connected to the terminal 42 and a
continuous pulse is input to the flip flop 40, 5CR7 turns on first to discharge the capacitor 8, and
then 5CR14 turns on to operate the I.Rigger circuit to discharge When the discharge of the tube
6 is started, the electric charge of the discharge tube 6 capacitor 5 is discharged through the
discharge tube 6 capacitor 8 to emit light. Further, when 5CR7 is turned on, the capacitor 8 is
discharged to prepare for light emission by the next 5CR14. This is repeated to the pulse input
4jj to emit light continuously. On the other hand, when the changeover switch 41 is switched to
the terminal 43 side, the 5CRs 7 and 14 are simultaneously turned on by pulse input. Therefore,
when the discharge tube 6 is activated, the charge of the discharge capacitor 5 is discharged by
the circuit of the discharge tube 6.5 CR7 and emits light. This light emission is normal light
emission, and the light emission is stopped by the output from the 1111 optical circuit 18 as
described above. According to the present invention, a capacitor is connected in parallel to the
switching element connected in series to the discharge tube, and a discharge circuit of this
capacitor is further provided according to the present invention. Since the switching element is
kept inoperative and the trigger circuit for starting the discharge tube and the discharge circuit
are operated alternately, it is possible to continuously emit light through the capacitor with one
discharge tube. In addition, normal light emission can be performed by simultaneously operating
the switching element and the trigger circuit. That is, according to the present invention, normal
light emission and continuous light emission can be selectively performed by one discharge tube.
18-04-2019
4
[0002]
Brief description of the drawings
[0003]
FIG. 1 is an electrical circuit diagram of an embodiment of the present invention, FIG. 2 is an
electrical circuit diagram of another embodiment, and FIG. 3 is a waveform diagram of each part
of FIG.
5: Capacitor for discharge, 6: Tube, 7. 11.14: 5 cR 18: Cond / S23: Switch, 24: Flip-flop, 25:
Oscillator circuit, 28: Capacitor, 29: Gate. Patent applicant Sa Corporation ・ pack
18-04-2019
5
Документ
Категория
Без категории
Просмотров
0
Размер файла
14 Кб
Теги
description, jps60189195
1/--страниц
Пожаловаться на содержимое документа