JP3315854B2 - Discharge lamp lighting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge lamp lighting device and a lamp socket applied to a vehicle headlight device and the like.

[0002]

2. Description of the Related Art A discharge lamp lighting device applied to a vehicle headlight device using a discharge lamp such as a metal halide lamp as a light source has a configuration as shown in FIG. That is, the inverter circuit unit 51 that uses the battery 50 as a power source, controls the voltage and electric power required by the discharge lamp 52, converts the AC power and stabilizes the AC power, and the high voltage (for example, It has an igniter circuit section 53 that is a starting device for generating 20 kV) and a lamp 54 that supports the discharge lamp 52.

FIG. 43 shows a discharge lamp 52 connected to a lamp socket, 55 is a central electrode of a base 59, 56 is an outer peripheral electrode of the base 59, 57 is a locking pin for attaching to the lamp socket, and 59a is a center. The peripheral wall portion is located on the outer periphery of the electrode 55. FIG. 44 is a lamp socket, 60 is a concave portion for inserting the base portion 59, and 61 is a concave portion for inserting the base portion 59.
Reference numeral 62 denotes an outer peripheral electrode that contacts the outer peripheral electrode 56, and 63 denotes a central electrode that contacts the central electrode 55.

FIG. 45 shows a discharge lamp 52 and a lamp socket 7.
0 shows the relationship between the igniter circuit unit 53 and the lamp socket 70 and the output terminal of the igniter circuit unit 53 are connected by a high-voltage harness 71. 72 is a pulse transformer, 73 is a circuit component, and 74 is a harness connected to the inverter 51 and the like. FIG. 46 shows a part of a vehicle body of a discharge lamp. 75 is a vehicle body, 76 is a lamp mounted on the vehicle body 75, 77 is a reflector mounted on the lamp 76, 78 is a power supply line, and the igniter circuit 53 and the inverter circuit 51 are mounted on the lamp 76. ing.

In this discharge lamp lighting device, power is supplied to the discharge lamp 52 by contact between the cylindrical central electrode 55 provided on the base 59 and the central electrode 63 of the lamp socket 70 and on the outer periphery of a part of the base 59. This is performed through contact between the provided outer peripheral electrode 56 and the outer peripheral electrode 62 of the lamp socket. However, when the discharge lamp lighting device is operated in a state where the discharge lamp 52 is not connected, the discharge occurs between the central electrode 63 and the outer peripheral electrode 62 of the lamp socket due to the high voltage generated by the igniter circuit 53, for example, 20 kV. It may cause damage to the socket or an accident.

On the other hand, the second conventional example (for example, Japanese Patent Laid-Open No. 4-29630) is not a socket type as shown in FIG. 47, but a fixing bracket 80 for fixing the discharge lamp 52 to the lamp 54 is provided with a lamp 80. Some have an interlock function section 81 that determines the presence or absence of the discharge lamp 52 by contacting the discharge lamp insertion section 54 and stops the output of high voltage. 82
Is a drive control circuit for the discharge lamp 52.

[0007]

However, in this discharge lamp lighting device, the lamp 54 and the fixture 80 need to have a switch function. Therefore, the purpose of this invention is
A discharge lamp lighting device and a discharge lamp lighting device capable of preventing the application of a high voltage in a state where the discharge lamp is not connected without changing a lamp or the like .
And to provide a lamp socket .

[0008]

According to a first aspect of the present invention, there is provided a discharge lamp lighting device, comprising: a lamp socket connected to a discharge lamp; a stabilizing circuit connected to a power supply for outputting a voltage to the lamp socket; Connected between the discharge lamp and the lamp socket, the discharge lamp is activated before the discharge lamp starts to generate a high voltage necessary to start the discharge of the discharge lamp to discharge the discharge lamp. A starting circuit to be deactivated, and mounting / discharging of the discharge lamp in the lamp socket.
Means for deactivating the starting circuit when not mounted in response to non-mounting , wherein the lamp socket includes a pair of main electrodes.
At least one main electrode is an output terminal of the stabilizing circuit.
Connected through the starting circuit to the input of the starting circuit.
One of the sections is connected to the one of the stabilizing circuits connected to the one main electrode.
Is connected to the output end of the road, said means, said Ranpusoke'
Connected to the other input of the starting circuit.
The auxiliary electrode is connected to the discharge lamp.
Connected to the other main electrode by the conductive part of the discharge lamp in this state.
It is configured to be

According to the discharge lamp lighting device of the first aspect,
Since the means for inactivating the starting circuit when the discharge lamp is not mounted is provided, no high voltage is generated when the discharge lamp is not mounted, so that damage to the lamp socket and accidents can be prevented. In addition, since the lamp socket is provided with the interlock mechanism by the above-described means, it is not necessary to change the lamp, the stabilizing circuit, and the like. On the other hand, even if an oxide film is generated on the surface of each electrode of the lamp socket, high self-healing can be expected by increasing the voltage applied to each electrode.

A discharge lamp lighting device according to a second aspect of the present invention includes a lamp socket for connecting a discharge lamp, and a lamp connected to the lamp socket for stably lighting the discharge lamp. When the lamp is turned off, it is higher than when the lamp is turned on. A stabilizing circuit for generating a voltage, and a stabilizing circuit that operates at an operating voltage lower than a voltage when the lamp is turned off and higher than a voltage when the lamp is turned on, and connected to the lamp socket to operate the discharge lamp. A starting circuit for starting discharge from an unlit state, and means provided in the lamp socket for reducing an input voltage of the starting circuit to the operating voltage or lower when the discharge lamp is not connected, and the lamp socket includes a pair of lamp sockets. With main electrode
And at least one main electrode is connected to the output terminal of the stabilizing circuit.
An input section of the starting circuit, connected via the starting circuit;
One of the stabilizing circuits is connected to the one main electrode.
Connected to the output end of the lamp socket
And connected to the other of the input portions of the starting circuit.
Having an auxiliary electrode, the auxiliary electrode being connected to the discharge lamp.
Connected to the other main electrode by the conductive portion of the discharge lamp
It is configured so that:

According to the discharge lamp lighting device of the second aspect,
Since the lamp socket has a means to reduce the input voltage of the starting circuit to the operating voltage or less when the discharge lamp is not connected, high voltage does not occur when the discharge lamp is not connected, thus preventing damage to the lamp socket and accidents. be able to. In addition, since the lamp socket is provided with the interlock mechanism by the above-described means, it is not necessary to change the lamp, the stabilizing circuit, and the like. On the other hand, even if an oxide film is generated on the surface of each electrode of the lamp socket, high self-healing can be expected because the voltage applied to each electrode is relatively high.

[0012]

[0013] Claim3The discharge lamp lighting device describedClaim
1 or Claim 2The conductive part of the discharge lamp is a base
Of the outer peripheral electrode. Claim3Discharge lamp lighting equipment
According to the claims2Has the same effect as

[0014] The discharge lamp lighting device according to claim 4, wherein the claim
In the first or second aspect , the conductive portion of the discharge lamp is a central electrode of a base. According to the discharge lamp lighting device of the fourth aspect, the same effect as the first or second aspect is obtained.
The discharge lamp lighting device according to the fifth aspect is the first or the second aspect.
5. The lamp socket according to claim 2, wherein one main electrode of the lamp socket is connected to an output terminal of the stabilizing circuit via the starting circuit, and the other main electrode is an output terminal of the stabilizing circuit. Is directly connected to

According to the discharge lamp lighting device according to claim 5, wherein
The same effect as that of claim 1, claim 2, claim 3, or claim 4 is obtained. The discharge lamp lighting device according to claim 6 is the same as in claim 1.
A high voltage according to claim 2, 3 or 4 , wherein each of said pair of main electrodes of said lamp socket is connected to an output terminal of said stabilizing circuit via said starting circuit and has a different positive and negative voltage. And a high voltage blocking means is connected to the auxiliary electrode.

According to the discharge lamp lighting device according to claim 6, wherein
In addition to the effects of claim 1, claim 2, claim 3, or claim 4 , it is possible to prevent a high voltage from being applied to the input side of the starting circuit. The discharge lamp lighting device according to claim 7 ,
7. The high voltage blocking means according to claim 6 , wherein the high voltage blocking means is a secondary winding which is provided in the high voltage transformer of the starting circuit and generates a high voltage having the same polarity and substantially the same polarity as the high voltage applied to the other main electrode. Things.

According to the discharge lamp lighting device of the seventh aspect, the same effect as that of the sixth aspect is obtained. The discharge lamp lighting device according to claim 8 , wherein the auxiliary electrode is connected to the discharge lamp according to claim 1, claim 2, claim 3, claim 4, claim 5, claim 6, or claim 7 . In this state, the contact portion is connected to the conductive portion of the discharge lamp, and its contact position is on the inner side of the lamp socket with respect to the contact position between the other main electrode and the conductive portion of the discharge lamp. It was done.

According to the discharge lamp lighting device according to claim 8, wherein
In addition to the effects of claim 1, claim 2, claim 3, claim 4, claim 5, claim 6, or claim 7 , the discharge lamp comes off the lamp socket, and the auxiliary electrode is The outer electrode and the center electrode to which a high voltage is applied are always connected to the discharge lamp even if the operation of the starting circuit is unstable due to the loose contact with the outer electrode of the lamp socket. It is possible to prevent damages and accidents due to a discharge phenomenon at the electrode part and application of a high voltage to the input part of the starting circuit.

According to a ninth aspect of the present invention, there is provided a discharge lamp lighting device for connecting a discharge lamp.
Lamp socket connected to the power supply and the lamp socket
A stabilizing circuit that outputs a voltage to a bracket and the stabilizing circuit
And the lamp socket connected between the
It is activated before the start of discharge, and is required to start the discharge of the discharge lamp.
While generating the necessary high voltage to discharge the discharge lamp
A starting circuit that is deactivated after the start of discharge;
Not mounted in response to the mounting / non-mounting of the lamp socket
And means for deactivation of the starting circuit during wear, the
The means is provided when the discharge lamp is not connected to the lamp socket.
Forming a closed circuit with respect to the output of the stabilizing circuit,
It has a configuration to open a closed circuit by connecting a discharge lamp.
You. According to the discharge lamp lighting device of claim 9, the same as claim 1
effective. The discharge lamp lighting device according to claim 10, a discharge lamp
Lamp socket to connect and connect to this lamp socket
To stably turn on the discharge lamp.
Stability that generates a higher voltage when lit than when lit
Circuit and the voltage of the stabilizing circuit when the lamp is turned off.
Operates at an operating voltage that is lower than the voltage when the lamp is lit
Being connected to the lamp socket and discharging
A starting circuit for starting discharge from a light-off state;
When the discharge lamp is not connected
A method for reducing the input voltage of the starting circuit to the operating voltage or lower.
And a stage, said means having a configuration in which the discharge lamp is a closed circuit is formed on the output of the stabilizing circuit when not connected to the lamp socket, opening the closed circuit by the connection of the discharge lamp It is. According to the discharge lamp lighting device according to claim 10, there is the same effect as 請 Motomeko 2.

[0020] The discharge lamp lighting device according to the eleventh aspect is the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth or ninth aspect. Claim 10
, Wherein the starting circuit is configured separately from the lamp socket. According to the discharge lamp lighting device of claim 11, claim 1, claim 2, claim 3,
Claim 4, Claim 5, Claim 6, Claim 7, Claim 8,
This has the same effect as the ninth or tenth aspect.

According to a twelfth aspect of the present invention, in the discharge lamp lighting device according to the eleventh aspect, the high-voltage blocking means connected to an auxiliary electrode is integrated with the lamp socket. According to the discharge lamp lighting device of the twelfth aspect, in addition to the effect of the eleventh aspect, a low-voltage lead line from the high-voltage blocking means to the starting circuit can be used.

According to a thirteenth aspect of the present invention, there is provided the discharge lamp lighting device according to the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth or ninth aspects. Claim 10
Wherein the starting circuit is integrated with the lamp socket. According to the discharge lamp lighting device of claim 13, claim 1, claim 2, claim 3, claim 4, claim 5, claim 6, claim 7, claim 8, claim 9, or claim 9 Item 10 has the same effect as item 10.

According to a fourteenth aspect of the present invention, in the discharge lamp lighting device according to the thirteenth aspect, a case having a socket portion, a pulse transformer storage portion, and an igniter circuit block storage portion is provided, and the starting circuit is stored in the pulse transformer storage portion. The igniter circuit block includes a pulse transformer constituting a part of an igniter circuit embedded in the filler, and an igniter circuit block housed in the igniter circuit block housing portion and embedded in the filler.

According to the discharge lamp lighting device of the fourteenth aspect, in addition to the effect of the thirteenth aspect, the socket, the pulse transformer housing and the igniter circuit block housing are provided in the case, so that a dedicated case such as a pulse transformer is provided. Can be eliminated, the number of parts can be reduced, and the size and cost can be reduced. According to a fifteenth aspect of the present invention, in the discharge lamp lighting device according to the fourteenth aspect, the pulse transformer housing and the igniter circuit block housing are separated by a partition.

According to the discharge lamp lighting device of the fifteenth aspect, in addition to the effects of the fourteenth aspect, it is possible to prevent the filler from being mixed in the pulse transformer housing portion and the igniter circuit block housing portion. According to a sixteenth aspect of the present invention, in the discharge lamp lighting device according to the fifteenth aspect, the pulse transformer housing part is formed on one surface side of the case, and the igniter circuit block housing part is formed on the other surface side of the case. .

According to the discharge lamp lighting device of the sixteenth aspect, in addition to the effect of the fifteenth aspect, mixing of the filler during the filling operation can be prevented by separating the storage surfaces of the pulse transformer and the igniter circuit block. Can be. The discharge lamp lighting device according to claim 17 is the device according to claim 16,
The opening of the pulse transformer housing is oriented in the same direction as the lamp insertion opening of the socket of the case.

According to the discharge lamp lighting device of the seventeenth aspect, the same effect as that of the sixteenth aspect is obtained. The discharge lamp lighting device according to the eighteenth aspect is the discharge lamp lighting device according to the sixteenth aspect, wherein the opening of the igniter circuit block housing portion is oriented in the same direction as the lamp insertion opening portion of the socket portion of the case. According to the discharge lamp lighting device of the eighteenth aspect, the same effect as that of the sixteenth aspect can be obtained.

[0028] According to a nineteenth aspect of the present invention, in the discharge lamp lighting device according to the fifteenth aspect, the socket is provided between the pulse transformer housing and the igniter circuit block housing. According to the discharge lamp lighting device of the nineteenth aspect, in addition to the effect of the fifteenth aspect, the weight balance can be improved.

According to a twentieth aspect of the present invention, in the discharge lamp lighting device according to the nineteenth aspect, the pulse transformer accommodating portion and the igniter circuit block accommodating portion have openings in the same direction as a lamp insertion opening of the socket portion of the case. It is aimed at. According to the discharge lamp lighting device of the twentieth aspect, the same effect as the nineteenth aspect can be obtained. According to a twenty-first aspect of the present invention, in the discharge lamp lighting device according to the nineteenth aspect, the pulse transformer housing portion and the igniter circuit block housing portion face openings in a direction opposite to a lamp insertion opening of the socket portion of the case. Things.

According to the discharge lamp lighting device of the twenty-first aspect, the same effect as the nineteenth aspect is obtained. The discharge lamp lighting device according to claim 22 is the discharge lamp lighting device according to claim 15, wherein the partition wall is formed separately from the case. Claim 22
According to the discharge lamp lighting device described above, in addition to the effect of claim 15, the pulse transformer and the igniter circuit block can be assembled outside the case, so that the assemblability is improved.

According to a twenty-third aspect of the present invention, in the discharge lamp lighting device according to the fourteenth aspect, the case is arranged such that the case is formed so that the igniter circuit block housing portion and the pulse transformer are substantially perpendicular to an opening direction of a lamp insertion opening of the socket portion. It has a storage opening communicating with the storage section. Claim 23
According to the discharge lamp lighting device described above, in addition to the effect of the fourteenth aspect, by sequentially storing the pulse transformer and the igniter circuit block and embedding them in the filling material in each, the partition wall is not required, so that the cost can be reduced. In addition, further miniaturization becomes possible.

According to a twenty-fourth aspect of the present invention, in the discharge lamp lighting device according to the fourteenth aspect, the case is divided into a portion in which the socket portion and the pulse toslan storage portion are integrated, and the igniter circuit block storage portion, The pulse transformer accommodating section accommodating the pulse transformer and the socket section are accommodated in the igniter circuit block accommodating section and embedded in a filler.

According to the discharge lamp lighting device of the twenty-fourth aspect, the same effect as that of the fourteenth aspect can be obtained. According to a twenty-fifth aspect of the present invention, in the thirteenth aspect, the starting circuit sets the center of gravity below an extension line behind a socket axis of the lamp socket. According to the discharge lamp lighting device of the twenty-fifth aspect, in addition to the effect of the thirteenth aspect, the optical axis of the discharge lamp is less likely to be displaced by vibration, the stability is improved, and the entire lighting circuit block is close to the discharge lamp. Since the space between the rear of the lamp body and the vehicle body can be enlarged, the replacement work of the discharge lamp is facilitated. Further, the high-voltage output of the high-voltage transformer of the lighting circuit block can be transmitted to the socket portion in the shortest distance, so that it is efficient, and since a high-voltage harness is not required, the safety at the time of replacing the discharge lamp is ensured. Further, since the center of gravity is located around the socket axis, the burden on the reflector serving as the mounting portion of the discharge lamp can be reduced.

According to a twenty-sixth aspect of the present invention, in the discharge lamp lighting device according to the twenty-fifth aspect, the starting circuit is an igniter, and a pulse transformer of the igniter is disposed below the lamp socket, so that a center of gravity of the igniter is adjusted. It is arranged below the extension line behind the socket shaft. According to the discharge lamp lighting device of the twenty-sixth aspect, the same effect as that of the twenty-fifth aspect can be obtained. A lamp socket according to claim 27.
The output of the first electrode contacts one electrode of the lamp.
The force part and the output of the second electrode contacting the other electrode of the lamp
A force portion and one of the first electrode and the second electrode
And an output portion of a third electrode to be connected.
According to the lamp socket according to claim 27, according to claim 1,
There is a similar effect. 29. The lamp socket according to claim 28.
The lamp according to claim 27, wherein the third electrode is a lamp.
In the state, the first electrode and the second electrode
It is connected to one side. A lamp according to claim 28.
According to the socket, the same effects as those of the twenty-seventh aspect are obtained. Contract
The lamp socket according to claim 29 is the lamp socket according to claim 28.
The third electrode is connected to the first electrode via a lamp electrode;
And one of the second electrode and the second electrode
is there. According to the lamp socket of claim 29, the lamp socket
An effect similar to that of the item 28 is obtained. 31. The lamp saw according to claim 30.
29. The device of claim 28, wherein the third electrode is a run.
The first electrode and the second electrode
One of the electrodes is connected by moving
You. According to the lamp socket according to claim 30, claim
It has the same effect as 28. The lamp socket according to claim 31.
29. The lamp of claim 28, wherein the third electrode is a lamp.
At the time of mounting, a small amount of the first electrode and the second electrode
At least one of them is connected later. Claim 31
According to the lamp socket described above, the same effect as in claim 28 is obtained.
There is fruit. Claim 32 is a lamp socket.
At 27, the third electrode is in the lamp non-mounted state.
And contacts one of the first electrode and the second electrode.
It will be continued . The lamp socket of claim 32.
According to this, the same effects as those of the twenty-seventh aspect are obtained.

[0035]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. That is, this discharge lamp lighting device is applied to a vehicle headlight device, and includes a lamp socket 1, a stabilizing circuit 2, a starting circuit 3,
And The lamp socket 1 is connected to a discharge lamp 49 (FIG. 3). The discharge lamp 49 has the same configuration as in FIG. In the lamp socket 1 of the embodiment, the discharge lamp 4 is used as a main electrode.
9 has a central electrode 5 in contact with a central electrode (not shown) of a base 49a, and an outer peripheral electrode 6 in contact with an outer peripheral electrode 49b of a base 49a serving as a conductive portion of the discharge lamp 49. At a position facing the outer peripheral electrode 6.
An auxiliary electrode 7 having the same configuration as that of the first embodiment is provided. The auxiliary electrode 7 and the outer peripheral electrode 6 are connected to each other by the outer peripheral electrode 49b of the base 49a when the base 49a of the discharge lamp 49 is inserted. Reference numeral 8 denotes a locking pin 49c provided on the outer peripheral surface of the base 49a of the discharge lamp 49 for holding the discharge lamp 49 by inserting and rotating the base 49a of the discharge lamp 49 into the lamp socket 1. Mounting slit.
A starting circuit 3 is provided inside the lamp socket 1.

The stabilizing circuit 2 is connected to a power supply and outputs a voltage to the lamp socket 1. The stabilizing circuit 2 is connected to the lamp socket 1 to stably light the discharge lamp, and generates a higher voltage when the lamp is turned off than when the lamp is turned on. I do. In this embodiment, an inverter circuit having the same configuration as that of FIG. 41 is used to generate a voltage of, for example, 300 V when the lamp is turned off. The input terminal is connected to a battery 9 serving as a power supply, and the output terminal is connected to a starting circuit 3 described later. It is connected to the central electrode 5 and the outer peripheral electrode 6 of the lamp socket 1 via the same. The inverter circuit in the rectangular wave lighting system is connected to the battery 9 via a switch (not shown), and has an input section having a function of noise filter, protection against reverse connection and surge absorption, and a step-up and constant power or high-batch operation. DC / DC with power control function
It comprises a DC converter, a low-frequency rectangular wave inverter for performing rectangular wave conversion, and an output unit having a noise filter. Furthermore, in order to control the lighting state, it has a control unit for controlling the stabilizing circuit 2 by a microcomputer or the like.

The starting circuit 3 is connected between the stabilizing circuit 2 and the lamp socket 1 and is activated before the discharge lamp starts discharging, and generates a high voltage necessary for starting the discharge of the discharge lamp. The discharge lamp is discharged, and is deactivated after the discharge is started. In the embodiment, the stabilizing circuit 2 operates at an operating voltage lower than the voltage when the lamp is turned off and higher than the voltage when the lamp is turned on, and is connected to the lamp socket 1 to start discharging the discharge lamp from the off state. It is to let. this
The starting circuit 3 is provided in the lamp socket 1 and uses an igniter circuit including a high-voltage transformer 3a and an igniter main circuit 3b having the same configuration as that of FIG. 41 and operating at an operating voltage of, for example, 250 V or more. One of the input terminals of the igniter main circuit 3b is connected at a connection point A to an output line in the lamp socket 1 connected to one of the output terminals of the stabilizing circuit 2, and the other end is connected to the auxiliary electrode 7. . Also high pressure tiger
The output terminal of the resistor 3 a is connected between the connection point A and the center electrode 5.

FIG. 2 shows the starting circuit 3. In FIG.
IN1 and IN2 are input terminals connected to the stabilizing circuit 2;
₀ -C ₃ capacitors, R ₁ to R ₅ is the resistance, L is inductance, D _1, D ₂ are diodes, SBS voltage responsive element, TR bidirectional thyristor, OUT _1, OUT ₂ the outer periphery of the lamp socket 1 An output terminal connected to the electrode 6 and the auxiliary electrode 7, OUT ₃ is an output terminal connected to the center electrode 5 of the lamp socket 1.

When there is no load, the stabilizing circuit 2
A rectangular wave of V (40 Hz) is output. When a rectangular wave is applied from the stabilizing circuit 2 to the input terminals IN1 and IN2 of the starting circuit 3, a rectangular wave operation comprising resistors R ₁ and R ₂ , capacitors C ₁ and C ₂ and diodes D ₁ and D ₂ is used. The double voltage charging circuit increases the series charging voltage of the capacitors C ₁ and C ₂ to 500 V or more. The series charging voltage of the capacitors C ₁ and C ₂ is detected by the voltage dividing resistors R ₃ and R _{4. When} the voltage reaches 500 V, the SBS is turned on and the triac TR is turned on. Energy at this time the gate is supplied from the capacitor C _3. The charges of the capacitors C ₁ and C ₂ flow to the primary side of the high-voltage pulse transformer 3b via the inductance L,
Generate high voltage on the next side. Capacitor C ₀ functions as a filter.

After the start of discharge, the stabilizing circuit 2 shifts from a 2.6 A constant current operation (lamp voltage = 0 to 29 V) to a 35 W steady operation (lamp voltage ≧ 63 V) after a transition period.
The inverter output voltage is equal to the lamp voltage and is between 0 V and 120
V. As described above, since the inverter output voltage (lamp voltage) is 120 V or less, the capacitors C1 and C2
Is less than 500 V, the starting circuit 3 does not operate, and no high-voltage pulse is generated.

In the case of no point, the stabilizing circuit 2 stops after 0.6 s, so that the starting circuit 3 also stops, and no high-voltage pulse is generated. Lamp is installed, stabilizing circuit 2 inputs IN1 connected to is connected to the igniter main circuit 3b of the starter circuit 3 through the outer peripheral electrode 49b from the output terminal OUT1 in the path of the output end OUT _2, the circuit of the starting circuit 3 A high-voltage pulse is generated according to the operation.

When the lamp is not mounted, the output terminals OUT1, OUT
2 is not connected, the power from the input terminal IN1 is not supplied to the starting circuit 3, and no high-voltage pulse is generated. In addition,
In this starting circuit 3, a high-voltage pulse is applied from the output terminal OUT3 to the central electrode of the discharge lamp 49 via the central electrode 5, and the outer electrode 6 and the auxiliary electrode 7 are output from the output terminals OUT1 and OUT2.
The outer peripheral electrode 49b via the terminal is almost grounded (the maximum is the inverter output voltage), so that the safety is high.

The means 4 responds to the mounting / non-mounting of the discharge lamp to the lamp socket 1 and inactivates the starting circuit 3 when the discharge lamp is not mounted. In the embodiment, when the discharge lamp 49 is not connected and is provided in the lamp socket 1, the input voltage of the starting circuit 3 is reduced to an operating voltage or less.
And an outer electrode which is one of the main electrodes through an outer electrode 49b which also serves as a conductive portion for discharging or the like in a connected state of the discharge lamp 49 using an auxiliary electrode 7 provided at one of the input portions of the starting circuit 3 and Connected to electrode 6.

FIG. 3 shows the arrangement of the lamp socket 1 in FIG. 1 in the body. A high-voltage pulse transformer 3a is disposed immediately behind the lamp socket 1, and a printed wiring board 3c constituting an igniter main circuit 3b is provided behind the high-voltage pulse transformer 3a. 3d is a harness connected to the stabilizing circuit 2 and the like. FIG. 4 shows a state applied to a vehicle body. 40 is a vehicle body, 41 is a lamp housing, 42 is an outer lens, 43 is a reflector, 44 is a reflector fixing screw,
45 is a bolt for adjusting the optical axis of the reflector,
Is a socket fixing screw with an igniter to be fixed to the reflection plate 43; 47 is an inverter fixing screw to be fixed to the lamp housing 41; 48 is a power connection line; 41a is a lamp cover;
b is a lamp fixing bolt, 3e is a connector, 1a is a discharge lamp 4
9 is a lamp fixing bracket for fixing 9 to the reflection plate 43.

FIG. 5 shows an assembling sequence of the vehicle headlight device. According to the order of the symbols in the ○ symbol attached to the arrow,
Assembled. That is, first, the stabilizing circuit 2 is connected to the lamp housing 41 by the inverter fixing screw 47 as shown in FIG.
Fixed to Like the connector 3e of the harness 3d
Is guided into the lamp housing 41. The reflector 43 is fixed by the reflector fixing screw 44 as shown in FIG. The outer lens 42 is attached to the vehicle body 40 as shown in FIG.
The discharge lamp 49 is inserted into the reflection plate 43 as shown in FIG. 4 and the discharge lamp 49 is fixed to the reflection plate 43 by the lamp fixing bracket 1a as shown in FIG. The metal fitting 1a is formed of a leaf spring, and engages with the engaging portion of the reflector plate 43 at the lamp insertion opening to fix the discharge lamp 49 to the reflector 43. The lamp socket 1 is mounted on the discharge lamp 49 as shown in FIG. The lamp body cover 41a is fixed to the lamp body housing 41 as indicated by 11. The lamp housing 41 is fixed by the lamp fixing bolt 41b as shown by ○ 12.
Is fixed to the vehicle body 40.

This discharge lamp lighting device comprises a lamp socket 1
When the discharge lamp 49 is not connected to the input terminal, the input terminal of the igniter main circuit 3b of the starting circuit 3 is lower than the operating voltage and power is not supplied.
Therefore, safety can be achieved in lamp replacement and the like. When the discharge lamp 49 is connected to the lamp socket 1, an input voltage of 300 V, which is a voltage when the light is turned off, is applied to the igniter main circuit 3 b through the outer electrode 6, the outer electrode 49 b which is a conductive portion of the discharge lamp, and the auxiliary electrode 7. Since the operating voltage is equal to or higher than 250 V, the starting circuit 3 operates, whereby a high voltage is generated and the discharge lamp can be started.

According to the first embodiment, the means 4 for lowering the input voltage of the stabilizing circuit 2 to the operating voltage or less when the discharge lamp is not connected is provided in the lamp socket 1, so that the discharge lamp 49 is not connected. Since no high voltage is generated at the time of connection, damage and accident of the lamp socket 1 can be prevented.
In addition, since the lamp socket 1 has an interlock mechanism constituted by the means 4, it is not necessary to change the lamp, the stabilizing circuit, and the like. Even if an oxide film is formed on the surface of each electrode of the lamp socket 1, high self-healing can be expected because the voltage applied to each electrode is relatively high (for example, the initial voltage at the time of turning off light is 300V).

A second embodiment of the present invention will be described with reference to FIG. That is, in this discharge lamp lighting device, in the first embodiment, the auxiliary electrode 7 is arranged outside the outer peripheral electrode 6 in the radial direction of the lamp socket 1 so as to face the outer peripheral electrode 6. When the base of the discharge lamp is inserted into the lamp socket 1, the outer electrode 6 comes into contact with the outer electrode of the base, and at the same time, the outer electrode 6 is pushed outward in the radial direction of the base. At this time, the outer peripheral electrode 6 comes into contact with the auxiliary electrode 7 so that power can be supplied to the starting circuit 3.

A third embodiment of the present invention will be described with reference to FIG. In this discharge lamp lighting device, the conductive portion of the discharge lamp 49 is used as the center electrode of the base 49b. That is, in the first embodiment, by arranging the auxiliary electrode 7 in parallel with the center electrode 5 and connecting the discharge lamp to the lamp socket 1,
The auxiliary electrode 7 and the central electrode 5 are connected by bringing the auxiliary electrode 7 and the central electrode 5 into contact with the central electrode of the discharge lamp. In this case, as compared with the first embodiment, the secondary winding of the high voltage transformer 3a of the starting circuit 3 is connected to the outer peripheral electrode 6 side.

A fourth embodiment of the present invention will be described with reference to FIG. That is, in this discharge lamp lighting device, the lamp socket 1 and the starting circuit 3 are separated from each other in the first embodiment, and both of them have three lead wires 10a to 10a.
0c. Also in this discharge lamp lighting device, as shown in the figure, the main electrode 5 of the lamp socket 1 is connected to the output terminal of the stabilizing circuit 2 via the starting circuit 3, and the main electrode 6 is directly connected to the output terminal of the stabilizing circuit 2. It is connected.

A fifth embodiment of the present invention will be described with reference to FIG. That is, in the discharge lamp lighting device according to the first embodiment, the high-voltage transformer 3a of the starting circuit 3 is connected to 2
Are divided into the secondary windings 12 and 13 and the center electrode 5
In addition, a positive high voltage is applied to one of the outer electrodes 6 and a negative high voltage is applied to the other of the outer electrodes 6, and the electrodes are connected in series to the electrodes in consideration of the polarity. In other words, the main electrodes 5 and 6 of the lamp socket 1 are connected to the output terminal of the stabilizing circuit 2 via the starting circuit 3.

On the other hand, in this case, a high voltage is applied to the auxiliary electrode 7. Therefore, the reactor 14 for blocking the high voltage is prevented from being applied to the power input terminal of the igniter main circuit 3b. It is connected to the auxiliary electrode 7 in series. A sixth embodiment of the present invention will be described with reference to FIG. That is, this discharge lamp lighting device has the fifth
In the embodiment, another secondary winding 16 that generates a voltage substantially equal to that of the secondary winding 12 connected to the outer peripheral electrode 6 is provided in place of the reactor 14, Are connected so that a voltage of the same polarity is generated at the auxiliary electrode 7. Thus, the high voltage applied to the auxiliary electrode 7 can be canceled as in the fifth embodiment, so that the high voltage can be prevented from being applied to the input terminal of the igniter main circuit 3b.

A seventh embodiment of the present invention will be described with reference to FIG. That is, the discharge lamp lighting device according to the first and fourth embodiments is different from the discharge lamp 4 according to the first and fourth embodiments.
The contact position between the outer electrode 49b of the base 49a and the auxiliary electrode 7 serving as the conductive portion of No. 9 is moved by a distance d toward the inner side of the lamp socket 1 from the contact position of the base 49a of the outer electrode 6 with the outer electrode 49b. It was done.

In this case, the central electrode 5 is set so that the central electrode of the base 49a contacts the central electrode 5 at the position where the outer peripheral electrode 6 contacts the outer peripheral electrode 49b of the base 49a. When fully inserted into the socket 1, the outer electrode 6 and the auxiliary electrode 7 are both connected to the base 49.
The auxiliary electrode 7 and the like are set so as to be in contact with the outer peripheral electrode 49b of FIG.

According to this embodiment, the discharge lamp 49 comes off the lamp socket 1 and the auxiliary electrode 7 comes into loose contact with the outer peripheral electrode 49b of the base 49a. Even if operation is unstable,
Since the outer electrode 6 and the center electrode 5 to which a high voltage is applied are always connected to the discharge lamp, a discharge phenomenon at the electrode portion of the lamp socket 1 and application of a high voltage to the input portion of the starting circuit 3 are performed. It is possible to prevent damage and accidents caused by such factors.

As shown in FIG. 12, a modification of this embodiment is a case where the auxiliary electrode 7 is located at the center electrode 5 as in the third embodiment, and the auxiliary electrode 7 is Are also provided on the inner side. An eighth embodiment of the present invention will be described with reference to FIGS.
That is, in the discharge lamp lighting device, in the first embodiment and the like, when the discharge lamp is not connected, the means 4 for lowering the input voltage of the starting circuit 3 to the operating voltage of the starting circuit 3 or less is used. When not connected to the lamp socket 1, a closed circuit is formed for the output of the stabilizing circuit 2, and the closed circuit is opened by connecting the discharge lamp 49.

In the embodiment, the center electrode 5 and the outer electrode 6
And the secondary winding of the high-voltage transformer is connected in series between the center electrode 5 and the connection point B of the input terminal of the starting circuit 3 connected thereto. I have. One of the output terminals of the stabilizing circuit 2 is connected to a connection point B of the starting circuit 3 connected to the central electrode 5, and the other is connected to the outer peripheral electrode via contact points 24 and 25 formed by leaf springs of the circuit protector 33. 6 is connected. In addition, the short-circuit piece 1 is attached to the center electrode 5.
7, an auxiliary electrode 7a is disposed adjacent to the center electrode 5, which contacts the tip of the short-circuit piece 17 when the discharge lamp is not connected and contacts the tip of the peripheral wall of the base 49a when the discharge lamp 49 is connected. The heating element 21 of the circuit protector 33 is connected between the outer peripheral electrode 6 and the auxiliary electrode 7a, and the outer peripheral electrode 6 is connected to the contact portion 24 of the circuit protector 33.
5, one of the output terminals of the stabilizing circuit 2 is connected.

Since the auxiliary electrode 7a is connected to the outer peripheral electrode 6 via the heating element 21, when the discharge lamp 49 is not connected,
The center electrode 5 and the outer peripheral electrode 6 are connected with a relatively low impedance close to a short circuit state. As a result, the inter-terminal voltage is significantly reduced and becomes lower than the operating voltage of the igniter main circuit 3b, so that the starting circuit 3 does not operate, so that no high voltage is applied to the center electrode 5. When the lamp is not connected, a current flows from the center electrode 5 to the auxiliary electrode 7a by the output of the stabilizing circuit 2, but the current is controlled so as not to exceed the maximum current value (for example, 2.6 A) in the stabilizing circuit 2. Overcurrent does not flow. However, unless the stabilizing circuit 2 is stopped, this current continues to flow, and thus an accident or the like may occur. Therefore, when a current flows through the auxiliary electrode 7a, the circuit protector 33 is operated by the current to cut off the output power from the stabilizing circuit 2.

FIG. 14 shows a circuit protector 33 in which the contact portions 24 and 25 are provided in a normally open state. 2
3 is a bimetal heated by the heating element 21;
A locking claw 27 for locking the contact portion 25 in contact with the contact portion 24 is provided at the tip. Reference numeral 26 denotes a reset button which is reciprocally penetrated through the through hole 29 of the body 28. The reset button 26 separates the contact portion 25 separated from the contact portion 24.
Is brought into contact again by pressing.

The state of the circuit protector shown in FIG. 13 is a state in which the contact portions 24 and 25 are in contact with each other, and the output of the stabilizing circuit 2 is output to the outer peripheral electrode 6. The current flowing through the auxiliary electrode 7a by the output of the stabilizing circuit 2 heats the heating element 21 in the circuit protector 33, deforms the bimetal 23 in the direction of the arrow in FIG. . Since the contact plate 25 is formed of a spring material, when the bimetal 23 is deformed in the direction of the arrow,
The contact portions 24 and 25 are separated, and the output of the stabilizing circuit 2 is cut off. When the bimetal 23 cools and returns to its original position, if the reset button 26 is pressed, the contact portions 24 and 25 come into contact again, and the engaging claws 27 of the bimetal 23 are engaged with the contact portions 25 and the contact portions 24 are engaged. , 25 are maintained in contact.

On the other hand, when the discharge lamp 49 is connected to the lamp socket 1, the auxiliary electrode 7a and the center electrode 5 are connected to the discharge lamp 49.
Is opened by the base 49a, and a high voltage can be generated, and the discharge lamp 49 can be started. Others are the same as in the first embodiment. The circuit protector 33 is not limited to the above-described embodiment, and may be an electromagnetic circuit protector.

A ninth embodiment of the present invention will be described with reference to FIG. That is, in the discharge lamp lighting device according to the eighth embodiment, the auxiliary electrode 7a and the short-circuiting piece 17 of the center electrode 5 are arranged inside the partition wall 30 that partitions the base insertion portion 1a of the lamp socket 1, and An insulating member 31 penetrating the wall 30 is provided with a base 4 inserted into the lamp socket 1.
By pressing with 9a, the short-circuit piece 17 and the auxiliary electrode 7a are separated. Shorting piece 17 and auxiliary electrode 7
It is assumed that the state in which a is separated by the insulating member 31 is set so that a sufficient insulating distance can be obtained with respect to the applied high voltage. A spring 32 urges the insulating member 31 in the direction in which the discharge lamp is connected to the lamp socket 1.
A tension spring may be used, or a compression spring may be used when the spring force for making the short-circuiting piece 17 and the auxiliary electrode 7a come into contact with each other is larger. Others are the same as in the eighth embodiment.

The tenth embodiment of the present invention will be described with reference to FIG. That is, this discharge lamp lighting device has a fourth
In this embodiment, the starting circuit 3 is separated from the lamp socket 1 and separated. In this case, by incorporating the reactor 14 of the high voltage blocking means in the lamp socket 1, the lead wire 10a from the reactor 14 to the starting circuit 3 can be of a low voltage.

An eleventh embodiment of the present invention will be described with reference to FIG. That is, this discharge lamp lighting device is applied to a vehicle headlight device, and has a starting circuit integrated into a lamp socket, and includes a case 101, an igniter circuit block 1022, and a pulse transformer 1033. The case 101 has a socket section 106, a pulse transformer housing section 107 for a starting circuit, and an igniter circuit block housing section 108 for a starting circuit. Pulse transformer housing 107 and igniter circuit block housing 10
8 is a partition wall 109, that is, the socket portion 1 in the embodiment.
06. In the socket 106, 113 and 114 are electrodes that come into contact with a base (not shown) of the discharge lamp.

The igniter circuit block 102 is housed in an igniter circuit block housing section 108 and is embedded in a filler 111 in which urethane is used as an embodiment.
112a is an electronic component of the igniter circuit block 102,
112b is a wiring board. The pulse transformer 103 is
It constitutes a part of the igniter circuit, is housed in the pulse transformer housing part 107, and is embedded in the filler 110 of an embodiment made of epoxy resin. In this case, the partition walls 109 prevent the fillers 110 and 111 from being mixed.

According to this embodiment, the socket 10
6. Since the pulse transformer housing 107 and the igniter circuit block housing 108 are provided in the case 101, a dedicated case such as a pulse transformer becomes unnecessary, the number of parts can be reduced, and the size and cost can be reduced. Further, since the pulse transformer housing 107 and the igniter circuit block housing 108 are separated by the partition wall 109, it is possible to prevent the fillers 110 and 111 of the pulse transformer housing 107 and the igniter circuit block housing 108 from being mixed. .

FIG. 18 shows a twelfth embodiment of the present invention. That is, in the vehicle headlamp apparatus according to the eleventh embodiment, the pulse transformer housing 107 is formed on one surface 101a of the case 101 and the igniter circuit block housing 108 is formed on the other surface 101b of the case 101 in the eleventh embodiment.
Is formed. Further, the pulse transformer housing 107 and the igniter circuit block housing 108 are separated by a partition wall 109. Other configurations are the same as in the eleventh embodiment.

According to this embodiment, the storage surfaces of the pulse transformer 103 and the igniter circuit block 102 are divided so that the filling materials 110 and 111 during the filling operation are separated.
Contamination can be prevented. FIG. 19 shows a thirteenth embodiment of the present invention. That is, in the vehicle headlamp apparatus according to the twelfth embodiment, the opening of the pulse transformer housing 107 is oriented in the same direction as the lamp insertion opening 106a of the socket 106 of the case 101, and the opposite direction. An igniter circuit block storage section 108 is formed. Others are the same as the twelfth embodiment.

FIG. 20 shows a fourteenth embodiment of the present invention. That is, in the vehicle headlamp device according to the thirteenth embodiment, the opening of the igniter circuit block housing portion 108 is oriented in the same direction as the lamp insertion opening portion 106a of the socket portion 106 of the case 101, The pult transformer housing 107 is formed in the direction. Others are the same as the thirteenth embodiment.

FIG. 21 shows a fifteenth embodiment of the present invention. That is, in this vehicle headlight device, in the twelfth embodiment, the socket part 106 is provided between the pulse transformer storage part 107 and the igniter circuit block storage part 108. In the embodiment, the pulse transformer housing 107 and the igniter circuit block housing 1
08 is oriented in the same direction as the lamp insertion opening 106 a of the socket 106 of the case 1.

According to this embodiment, a weight balance can be achieved as a whole. Others are the same as the twelfth embodiment. FIG. 22 shows a sixteenth embodiment of the present invention. That is, in the vehicle headlamp apparatus according to the fifteenth embodiment, the pulse
7 and the igniter circuit block storage section 108 are
The opening is directed in the opposite direction to the direction a. Others are the same as the fifteenth embodiment.

FIG. 23 shows a seventeenth embodiment of the present invention. That is, in this vehicle headlight device, in the twelfth embodiment, the partition wall 109 is formed separately from the case 101, and is disposed between the pulse transformer housing 107 and the igniter circuit block housing 108. ing. In the embodiment, the igniter circuit block 10 is
2 is fixed, and one of the electronic components 11 of the igniter circuit block 102 is partitioned by the partition 109 of the wiring board 112b.
2a is mounted, and the pulse transformer 103 is mounted on the other. Others are the same as the twelfth embodiment.

According to this embodiment, in addition to the functions and effects of the twelfth embodiment, since the pulse transformer 3 and the igniter circuit block 102 can be assembled outside the case 101, the assemblability is improved. An eighteenth embodiment of the present invention is shown in FIGS. That is, this vehicle headlight device is different from the eleventh embodiment in the case 1
01 is a lamp insertion opening 106a of the socket 106.
The storage opening 101c communicates with the igniter circuit block storage 107 and the pulse transformer storage 108 in a direction substantially perpendicular to the direction of the opening.

In the embodiment, the case 101 is provided with a detachable lid 115, and the socket portion 106 is provided on the upper surface of the lid 115.
Is provided. Further, the pulse transformer 103 is mounted on the wiring board 112a of the igniter circuit block 102, and is housed together in the case 101 so that the pulse transformer 103 is located on the back side, that is, below the housing opening 101c. The igniter circuit block 1 embedded in the filler 110 according to the embodiment
For 02, a urethane resin is embedded in the filler 111 used in the embodiment.

According to this embodiment, since the partition 109 and the like are not required, the number of components can be reduced, the cost can be reduced, and the size can be further reduced. A nineteenth embodiment of the present invention is shown in FIGS.
That is, in the vehicle headlight device according to the eleventh embodiment, the case 101 is configured such that the case portion 101 is a portion 101 in which the socket portion 106 and the pulse toslan storage portion 107 are integrated.
d and an igniter circuit block storage unit 108, and a pulse transformer storage unit 107 and a socket unit 106 in which the pulse transformer 103 is stored are stored in the igniter circuit block storage unit 108, and a urethane resin is used as the filler 111 in the embodiment. Embedded inside.

In the embodiment, the part 10 of the case 101
1d is a socket section 106 and a pulse transformer storage section 107
Are integrally formed in the opposite direction, the pulse transformer 103 is housed in the pulse transformer housing 107, and the epoxy resin is embedded in the filler 110 according to the embodiment.
The igniter circuit block storage unit 108 has a space in which the igniter circuit block 102 and the pulse transformer storage unit 107 of the part 101d can be stored.
The socket portion 106 protrudes from the case 101 in a state where the socket portion 106 is stored in the case 101. The pulse transformer 103 is mounted on the wiring board 112b of the igniter circuit block 102. Assembling is performed by connecting the pulse transformer 103 to the wiring board 112b.
And electronic component 112 of igniter circuit block 102
After mounting a, the igniter circuit block storage unit 108
And the igniter circuit block storage unit 108 is embedded in the filler 111.

The other points are the same as in the eleventh embodiment. In addition, although the filling material 110 used epoxy resin and the filling material 111 used urethane resin, it is not limited to these, and the filling materials 110 and 111 may be the same material. FIG. 2 shows a twentieth embodiment of the present invention.
8 and FIG. That is, in this vehicle headlight device, the lighting circuit block 203 integrally has the socket portion 202 on which the discharge lamp 201 is mounted, and the center of gravity of the lighting circuit block 203 is extended rearward of the socket shaft 213 of the socket portion 202. It is set below the line 213a. 202a
Is the outer electrode, 202b is the center electrode, 204 is the base, 20
5 is a harness connected to a stabilizing circuit or the like, 206 is a high-voltage pulse transformer, 207 is a printed circuit board, 208 is an electronic component, 209 is a vehicle body, 210 is a lamp, 211 is a reflector, 2
12 is a mounting bracket, 214 is a locking projection, 230 is a fitting portion of the socket 202 for the discharge lamp, and 231 is the center of gravity of the lighting circuit block 203.

According to this embodiment, the moment of the lighting circuit block 203 caused by the center of gravity 231 around the fitting portion 230 of the discharge lamp 201 and the socket portion 202 during traveling becomes as shown by the arrow in FIG. In addition, the optical axis of the discharge lamp 201 is less likely to be deviated due to vibration, the stability is improved, and the entire lighting circuit block 203 is
And the space C between the rear of the lamp 210 and the vehicle body 209
Can be increased, so that the replacement work of the discharge lamp 201 is facilitated. Further, the high-voltage output of the high-voltage pulse transformer 206 of the lighting circuit block 203 is transmitted to the socket 202 at the shortest distance.
Therefore, the discharge lamp 201 can be transmitted efficiently, and the high-pressure harness is not required. Further, since the center of gravity is located around the socket shaft 213, it is possible to reduce the load on the reflector 211 serving as a mounting portion of the discharge lamp 201.

Although the center of gravity of the lighting circuit block 203 is set below the extension of the socket shaft 213, it may be set below the radial direction of the socket shaft 213. FIG. 30 shows a twenty-first embodiment of the present invention. That is, in the vehicle headlight device according to the twentieth embodiment, the pulse transformer 206 is disposed below the socket portion 202 in the twentieth embodiment so that the center of gravity of the lighting circuit block 203 is extended from the extension line 213 a behind the socket shaft 213. It is located below.

The other points are the same as in the twentieth embodiment. The lighting circuit block 203 of this embodiment
Is an igniter, that is, a starting circuit among the components of the lighting circuit, but may include the entire lighting circuit. FIG. 31 shows a twenty-second embodiment of the present invention. That is,
The discharge lamp lighting device applied to this vehicle headlight device is configured such that a rectangular parallelepiped case 250 is divided into approximately three equal parts.
, A socket part 253 is arranged in one end of the space, and a pulse transformer 254 of the starting circuit is arranged in the center space.
Igniter circuit block 2 in the space at the other end.
The pulse transformer 254 and the igniter circuit block 255 are filled with fillers 256 and 257, respectively.

When the lamp is mounted, the peripheral electrode 258
a, 258b are conducted by the lamp peripheral electrode, and the input from the inverter of the stabilizing circuit is applied to one peripheral electrode 258a.
Is input to the igniter circuit through the lamp peripheral electrode and the other peripheral electrode 258b. 2
59 is a central electrode, 260 is an electronic component. A twenty-third embodiment of the present invention is shown in FIGS. That is, in this vehicle headlight device, the power transformer housing portion 301 is formed at a position slightly deviated in the radial direction from a substantially center in the case 300 of a cylindrical resin molded product, and is adjacent to the power transformer housing portion 301. The socket portion 302 is formed integrally with the larger space to be used, and the remaining peripheral portion is used as an igniter circuit housing portion 303 (FIGS. 34 and 35). In the power transformer housing 301, the PT primary winding 326
And PT bobbin 3 on which PT secondary winding 304 is wound
A core 306 is provided so as to surround the bobbin 305 from one side.
PT terminal 308 for secondary side input / output, PT terminal 3 for secondary side input
27 and a PT high voltage output section 309 for secondary output. The power transformer housing 301 is epoxy vacuum cast.

The socket portion 302 is connected to the printed circuit board 307 of the starting circuit and is provided with a peripheral electrode 310 and an auxiliary electrode 311 which are in contact with the lamp peripheral electrode, and are in contact with the lamp central electrode and joined with the PT high voltage output portion 309. A central electrode 312 is provided at the center. A lamp pin insertion portion 313 is provided at the edge of the opening. The lamp pin insertion portion 313 is used for positioning between each electrode of the discharge lamp and each electrode on the socket side. Is formed. Igniter circuit storage unit 30
In 3, reference numeral 307 denotes a printed circuit board, 314 denotes a connector receiving connector for connecting the connector 315 of the stabilizing circuit, 316 denotes a triac, 317 denotes a capacitor, 318 denotes an inductance coil, and 323 denotes an SBS. The igniter circuit housing 303 is cast in silicon.

At three positions on the outer periphery of the case 300, fixing portions 319 for fixing to the reflection plate are extended. Further, the peripheral surface and the back surface of the case 300 excluding the front surface are covered with a cover 320 formed of a conductor for noise shielding. However, the cover 320 has a hole for projecting the fixing portion 319 and a hole for inserting a connector. 321
Is a terminal 325 for receiving the inverter output of the connector 314.
And the cover 320 is grounded by the lead portion 321a. Reference numeral 322 denotes an insulating wall for ensuring insulation between the central electrode 312, the peripheral electrode 310, and the auxiliary electrode 311.

FIG. 39 to FIG. 41 show a twenty-fourth embodiment of the present invention. That is, this vehicle headlight device is almost common to the twenty-third embodiment, but the difference is that
The case 300 and the socket part 302 are formed separately, and the socket part 302 is attached to the case 300 by attaching means. In the socket portion 302, a lamp pin insertion portion 313 is formed in a substantially L-shaped slit so as to rotate and lock the lamp pin, thereby maintaining the overall weight. Further, the connector 314 is oriented not in the axial direction of the case 300 but in the radial direction. Also, the fixing part 319 is omitted.

In the present invention, the above-described embodiments may be combined with each other in some cases.
Further, as the stabilizing circuit 2, not only the stabilizing circuit 2 that changes the voltage before and after the discharge of the discharge lamp is started as in the above-described embodiment, the stabilizing circuit 2 is operated at a constant voltage, and the change in the lamp voltage is inserted in series. There is also a method in which the burden is imposed by the adjusted impedance.

[0086]

According to the discharge lamp lighting device of the first aspect, since the means for inactivating the starting circuit when the discharge lamp is not mounted is provided, a high voltage is not generated when the discharge lamp is not mounted, so that the lamp is not used. Damage to the socket and accidents can be prevented. In addition, since the lamp socket is provided with the interlock mechanism by the above-described means, it is not necessary to change the lamp, the stabilizing circuit, and the like. On the other hand, even if an oxide film is generated on the surface of each electrode of the lamp socket, high self-healing can be expected by increasing the voltage applied to each electrode.

According to the discharge lamp lighting device of the second aspect,
Since the lamp socket has a means to reduce the input voltage of the starting circuit to the operating voltage or less when the discharge lamp is not connected, high voltage does not occur when the discharge lamp is not connected, thus preventing damage to the lamp socket and accidents. be able to. In addition, since the lamp socket is provided with the interlock mechanism by the above-described means, it is not necessary to change the lamp, the stabilizing circuit, and the like. On the other hand, even if an oxide film is generated on the surface of each electrode of the lamp socket, high self-healing can be expected because the voltage applied to each electrode is relatively high.

[0088] Claim3According to the discharge lamp lighting device ofClaim
Claim 1 or Claim 2Has the same effect as Claim4Discharge lamp
According to the lighting device,Claim 1 or Claim 2And the same effect
is there. Claim5According to the discharge lamp lighting device ofClaim 1,
Claim 2, claim 3, or claim 4Has the same effect as

[0089] According to the discharge lamp lighting device according to claim 6, wherein
In addition to the effects of claim 1, claim 2, claim 3 or claim 4 , it is possible to prevent a high voltage from being applied to the input side of the starting circuit. According to the discharge lamp lighting device of claim 7 ,
This has the same effect as the sixth aspect . According to the discharge lamp lighting device of claim 8 , in addition to the effects of claim 1, claim 2, claim 3, claim 4, claim 5, claim 6, or claim 7 , the discharge lamp is connected to the lamp socket. In this case, the auxiliary electrode comes into loose contact with the outer electrode of the base, and even if the operation of the starting circuit is unstable, the outer electrode and the center electrode to which a high voltage is applied must be released. Since it is connected to the electric lamp, it is possible to prevent damage and accidents due to a discharge phenomenon at the electrode portion of the lamp socket and application of a high voltage to the input portion of the starting circuit.

According to the discharge lamp lighting device of claim 9,
It has the same effect as item 1. According to the discharge lamp lighting device according to claim 10, there is the same effect as 請 Motomeko 2. According to the discharge lamp lighting device of claim 11, claim 1, claim 2, claim 3,
Claim 4, Claim 5, Claim 6, Claim 7, Claim 8,
This has the same effect as the ninth or tenth aspect.

According to the discharge lamp lighting device of the twelfth aspect, in addition to the effect of the eleventh aspect, a low-voltage lead from the high-voltage blocking means to the starting circuit can be used. Claim 1
According to the discharge lamp lighting device described in claim 3, claim 1, claim 2, claim 3, claim 4, claim 5, claim 6, claim 7, claim 8, claim 9, or claim 10 Has the same effect as

According to the discharge lamp lighting device of the fourteenth aspect, in addition to the effect of the thirteenth aspect, since the socket, the pulse transformer housing and the igniter circuit block housing are provided in the case, a special case such as a pulse transformer is provided. Can be eliminated, the number of parts can be reduced, and the size and cost can be reduced. According to the discharge lamp lighting device of the fifteenth aspect, in addition to the effect of the fourteenth aspect, it is possible to prevent the mixing of the filler in the pulse transformer housing portion and the igniter circuit block housing portion.

According to the discharge lamp lighting device of the sixteenth aspect, in addition to the effect of the fifteenth aspect, mixing of the filler during the filling operation can be prevented by separating the storage surfaces of the pulse transformer and the igniter circuit block. Can be. According to the discharge lamp lighting device of the seventeenth aspect, the same effect as in the sixteenth aspect is obtained. According to the discharge lamp lighting device of the eighteenth aspect, the same effect as that of the sixteenth aspect can be obtained.

According to the discharge lamp lighting device of the nineteenth aspect, in addition to the effect of the fifteenth aspect, the weight balance can be improved. According to the discharge lamp lighting device of the twentieth aspect, the same effect as the nineteenth aspect can be obtained. According to the discharge lamp lighting device of the twenty-first aspect, the same effect as the nineteenth aspect is obtained. According to the discharge lamp lighting device of the twenty-second aspect, in addition to the effect of the fifteenth aspect, the pulse transformer and the igniter circuit block can be assembled outside the case, and the assemblability is improved.

According to the discharge lamp lighting device of the twenty-third aspect, in addition to the effect of the fourteenth aspect, a partition wall is required by sequentially housing the pulse transformer and the igniter circuit block and embedding them in the filler material. This eliminates costs and allows further downsizing. According to the discharge lamp lighting device of the twenty-fourth aspect, the same effect as that of the fourteenth aspect is obtained.

According to the discharge lamp lighting device of the twenty-fifth aspect, in addition to the effects of the thirteenth aspect, the optical axis of the discharge lamp is less likely to be displaced by vibration, and the stability is improved. And the space between the rear of the lamp body and the vehicle body can be enlarged, so that the work of replacing the discharge lamp is facilitated. Further, the high-voltage output of the high-voltage transformer of the lighting circuit block can be transmitted to the socket portion in the shortest distance, so that it is efficient, and since a high-voltage harness is not required, the safety at the time of replacing the discharge lamp is secured. Further, since the center of gravity is located around the socket axis, the burden on the reflector serving as the mounting portion of the discharge lamp can be reduced.

According to the discharge lamp lighting device of the twenty-sixth aspect, the same effects as those of the twenty-fifth aspect can be obtained. Claim 27
According to the lamp socket, the same effect as in claim 1 is obtained.
You. According to the lamp socket of claim 28, the lamp socket
It has the same effect as 27. A lamp socket according to claim 29.
According to the present invention, the same effects as those of the twenty-eighth aspect are obtained. Claim
According to the lamp socket of claim 30, as in claim 28,
Has a significant effect. A lamp socket according to claim 31,
This has the same effect as the twenty-eighth aspect. Claim 32.
According to the lamp socket, an effect similar to that of claim 27 is obtained.
You.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a first embodiment of the present invention.

FIG. 2 is a circuit diagram of a starting circuit.

FIG. 3 is a sectional view of a lamp socket in which a discharge lamp is removed and a starting circuit is incorporated.

FIG. 4 is a partial cross-sectional view of the vehicle body in a state where the discharge lamp lighting device is applied to the vehicle body.

FIG. 5 is an explanatory diagram for explaining the assembly.

FIG. 6 is a partial sectional view of the second embodiment.

FIG. 7 is a partial sectional view of the third embodiment.

FIG. 8 is an explanatory diagram of a fourth embodiment.

FIG. 9 is an explanatory diagram of a fifth embodiment.

FIG. 10 is an explanatory diagram of a sixth embodiment.

FIG. 11 is a partial sectional view of the seventh embodiment.

FIG. 12 is a partial sectional view of the modification.

FIG. 13 is an explanatory diagram of the eighth embodiment.

FIG. 14 is a schematic sectional view of a circuit protector.

FIG. 15 is a partial sectional view of the ninth embodiment.

FIG. 16 is an explanatory diagram of the tenth embodiment.

FIG. 17 is a sectional view of the eleventh embodiment.

FIG. 18 is a sectional view of a twelfth embodiment.

FIG. 19 is a sectional view of a thirteenth embodiment.

FIG. 20 is a sectional view of a fourteenth embodiment.

FIG. 21 is a sectional view of a fifteenth embodiment.

FIG. 22 is a sectional view of a sixteenth embodiment.

FIG. 23 is a sectional view of a seventeenth embodiment.

FIG. 24 is an exploded sectional view of the eighteenth embodiment.

FIG. 25 is a sectional view of the assembled state.

FIG. 26 is an exploded sectional view of the nineteenth embodiment.

FIG. 27 is a sectional view of the assembled state.

FIG. 28 is a sectional view of the twentieth embodiment with the discharge lamp removed.

FIG. 29 is a cross-sectional view of a state where the lighting circuit block is mounted on a vehicle body.

FIG. 30 is a sectional view showing a state where the discharge lamp according to the twenty-first embodiment is removed.

FIG. 31 is a sectional view of a twenty-second embodiment.

FIG. 32 is a front view of the discharge lamp mounting side of the twenty-third embodiment as viewed from the front.

FIG. 33 is a sectional view of the same.

FIG. 34 is a rear view showing a state in which the cover is broken.

FIG. 35 is a rear view of the case.

FIG. 36 is a rear view showing a state in which the printed circuit board is attached to the case and the cover is broken.

FIG. 37 is a rear view showing a state where a high-voltage pulse transformer is attached to a case.

FIG. 38 is a rear view showing a state in which electrodes are attached to a case and a cover is broken.

FIG. 39 is a front view of the discharge lamp mounting side of the twenty-fourth embodiment as viewed from the front;

FIG. 40 is a sectional view of the same.

FIG. 41 is a rear view showing a state in which the cover is broken.

FIG. 42 is an explanatory diagram of a first conventional example.

FIG. 43 is a partially cutaway side view of the discharge lamp.

FIG. 44 is a partially cutaway side view of the lamp socket.

FIG. 45 is a sectional view showing a lamp socket and a starting circuit from which a discharge lamp has been removed.

FIG. 46 is a partial cross-sectional view of the vehicle body in a state where the discharge lamp lighting device is mounted on the vehicle body.

FIG. 47 is an explanatory diagram of a second conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lamp socket 2 Stabilization circuit 3 Starting circuit 3a High voltage transformer 4 Means 5 Center electrode 6 Peripheral electrode 7 Auxiliary electrode 14 Reactor of high voltage blocking means 49 Discharge lamp 49a Base 101 Case 102 Igniter circuit block 103 Pulse transformer 106 Socket part 107 Pulse transformer Storage section 108 Igniter circuit block storage section 109 Partition wall 201 Discharge lamp 202 Socket section 203 Lighting circuit block 213 Socket shaft

────────────────────────────────────────────────── ─── of the front page continued (51) Int.Cl. ⁷ identification mark FI H05B 41/00 (72) inventor Ryosuke Maruyama Osaka Prefecture Kadoma Oaza Kadoma 1048 address Matsushita Denko Co., Ltd. in the (56) reference Patent JP-A-6-76965 (JP, A) JP-A-5-275182 (JP, A) JP-A-5-275181 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H05B 41 / 24 B60Q 1/04 F21S 8/10 F21V 23/00 F21V 25/00 H05B 41/00

Claims (32)

(57) [Claims] 1. A lamp socket for connecting a discharge lamp, a stabilizing circuit connected to a power supply and outputting a voltage to the lamp socket, and a stabilizing circuit connected between the stabilizing circuit and the lamp socket for connecting the discharge lamp. A starting circuit that is activated before the start of discharge, generates a high voltage necessary for starting the discharge of the discharge lamp, discharges the discharge lamp, and is deactivated after the start of discharge; and the lamp of the discharge lamp. Means for deactivating the starting circuit when not mounted in response to mounting / non-mounting on the socket , wherein the lamp socket has a pair of main electrodes and has at least one
One of the main electrodes has the starting circuit connected to the output terminal of the stabilizing circuit.
One of the inputs of the starting circuit is connected to the
Connected to the output terminal of the stabilization circuit connected to the other main electrode
Is, the means, the start-up is provided to the lamp socket
Having an auxiliary electrode connected to the other input of the circuit,
When the auxiliary electrode is electrically connected to the discharge lamp,
Part is connected to the other main electrode.
That the discharge lamp lighting device. 2. A lamp socket for connecting a discharge lamp, a stabilization circuit connected to the lamp socket for stably lighting the discharge lamp and generating a higher voltage when the lamp is turned off than when the lamp is turned on, A starting circuit that operates at an operating voltage lower than the voltage when the lamp is turned off and higher than the voltage when the lamp is turned on, and connected to the lamp socket to start discharging the discharge lamp from the turned-off state; Means for reducing the input voltage of the starting circuit below the operating voltage when the discharge lamp is not connected , the lamp socket having a pair of main electrodes and having at least one main electrode.
One of the main electrodes has the starting circuit connected to the output terminal of the stabilizing circuit.
One of the inputs of the starting circuit is connected to the
Connected to the output terminal of the stabilization circuit connected to the other main electrode
Is, the means, the start-up is provided to the lamp socket
Having an auxiliary electrode connected to the other input of the circuit,
When the auxiliary electrode is electrically connected to the discharge lamp,
Part is connected to the other main electrode.
That the discharge lamp lighting device. Wherein the discharge lamp discharge lamp lighting device of conductive parts according to claim 1 or claim 2 wherein the peripheral electrode of the mouthpiece. Wherein said discharge lamp discharge lamp lighting device of conductive parts according to claim 1 or claim 2, wherein the center electrode of the mouthpiece. 5. A is connected to the output end of the stabilizing circuit through the one main electrode of the lamp socket the starting circuit, wherein the other main electrode is connected directly to the output terminal of the ballast circuit Claim 1, Claim 2, Claim 3, or Claim
4. The discharge lamp lighting device according to 4 . 6. The pair of main electrodes of the lamp socket are connected to the output terminal of the stabilizing circuit via the starting circuit, and are configured to apply high and negative high voltages, respectively. the auxiliary claim 1 connected to the high voltage blocking unit to the electrodes, according to claim 2, claim 3 or
The discharge lamp lighting device according to claim 4 . 7. The high voltage blocking means is a secondary winding which is provided in a high voltage transformer of the starting circuit and generates a high voltage having the same polarity and substantially the same polarity as the high voltage applied to the other main electrode. The discharge lamp lighting device according to claim 6 . 8. The auxiliary electrode is connected to a conductive portion of the discharge lamp in a connection state of the discharge lamp, and a contact position of the auxiliary electrode between the other main electrode and a conductive portion of the discharge lamp. 2. The method according to claim 1, wherein the lamp socket is located on an inner side of the lamp socket with respect to a contact position.
The discharge lamp lighting device according to claim 5, 6, or 7 . 9. A lamp socket for connecting a discharge lamp, and an electric lamp.
Connected to a power source and output voltage to the lamp socket
Between the stabilizing circuit and the lamp socket.
Is activated before the discharge lamp starts to discharge.
The high voltage required to start the discharge of the discharge lamp
Discharges the lamp and becomes inactive after the discharge starts.
Starting circuit, and mounting of the discharge lamp in the lamp socket.
In response to wearing / not wearing, the starting circuit is inactive when not wearing
Means for forming a closed circuit with respect to the output of the stabilization circuit when the discharge lamp is not connected to the lamp socket,
The discharge lamp discharge electrostatic <br/> lamp lighting apparatus that have a structure that opens the closed circuit by the connection. 10. A lamp socket for connecting a discharge lamp,
Connected to this lamp socket for stable lighting of the discharge lamp
When the lamp is off, compared to when the lamp is on
And a stabilizing circuit that generates a high voltage
Lower than lamp off voltage than lamp on voltage
Also operate at a high operating voltage, and
The discharge lamp is connected to the discharge
And a starting circuit provided in the lamp socket.
When the discharge lamp is not connected, the input voltage of the starting circuit
Means for lowering the operating voltage or lower, the means forming a closed circuit with respect to the output of the stabilizing circuit when the discharge lamp is not connected to the lamp socket;
The discharge lamp discharge electrostatic <br/> lamp lighting apparatus that have a structure that opens the closed circuit by the connection. 11. The lighting device according to claim 1, wherein the starting circuit is formed separately from the lamp socket. The discharge lamp lighting device according to claim 8, 9 or 10. 12. The discharge lamp lighting device according to claim 11, wherein said high voltage blocking means connected to an auxiliary electrode is integrated into said lamp socket. 13. The lamp circuit according to claim 1, wherein said starting circuit is integrated with said lamp socket. The discharge lamp lighting device according to claim 8, 9 or 10. 14. A case having a socket portion, a pulse transformer storage portion, and an igniter circuit block storage portion, wherein the starting circuit includes a part of the igniter circuit stored in the pulse transformer storage portion and embedded in a filler. 14. The discharge lamp lighting device according to claim 13, further comprising: a pulse transformer configured; and an igniter circuit block housed in the igniter circuit block housing portion and embedded in a filler. 15. The discharge lamp lighting device according to claim 14, wherein the pulse transformer housing and the igniter circuit block housing are separated by a partition. 16. The discharge lamp lighting device according to claim 15, wherein the pulse transformer housing is formed on one surface of the case, and the igniter circuit block housing is formed on the other surface of the case. 17. The discharge lamp lighting device according to claim 16, wherein the opening of the pulse transformer housing is oriented in the same direction as the lamp insertion opening of the socket of the case. 18. The discharge lamp lighting device according to claim 16, wherein the opening of the igniter circuit block housing is oriented in the same direction as the lamp insertion opening of the socket of the case. 19. The discharge lamp lighting device according to claim 15, wherein said socket portion is provided between said pulse transformer housing portion and said igniter circuit block housing portion. 20. The discharge lamp lighting device according to claim 19, wherein the pulse transformer storage section and the igniter circuit block storage section face openings in the same direction as a lamp insertion opening of the socket section of the case. 21. The discharge lamp lighting device according to claim 19, wherein the pulse transformer storage section and the igniter circuit block storage section face openings in a direction opposite to a lamp insertion opening of the socket section of the case. 22. The discharge lamp lighting device according to claim 15, wherein the partition is formed separately from the case. 23. The case according to claim 14, wherein the case has a storage opening communicating with the igniter circuit block storage and the pulse transformer storage in a direction substantially perpendicular to an opening direction of the lamp insertion opening of the socket. Discharge lamp lighting device. 24. The case according to claim 24, wherein the case is divided into an integrated portion of the socket portion and the pulse toslan housing portion and the igniter circuit block housing portion, and the pulse transformer housing portion housing the pulse transformer and the socket portion. 15. The discharge lamp lighting device according to claim 14, wherein is stored in the igniter circuit block storage portion and embedded in a filler. 25. The discharge lamp lighting device according to claim 13, wherein the center of gravity of the starting circuit is set below an extension line behind a socket axis of the lamp socket. 26. The igniter according to claim 26, wherein the starting circuit is an igniter, and a center of gravity of the igniter is arranged below an extension line behind the socket shaft by disposing a pulse transformer of the igniter below the lamp socket. 2
5. The discharge lamp lighting device according to 5. 27. An output of a first electrode contacting one electrode of the lamp, an output of a second electrode contacting the other electrode of the lamp, the first electrode and the second electrode. And a third electrode output connected to one of the lamp sockets. 28. The lamp socket according to claim 27, wherein the third electrode is connected to one of the first electrode and the second electrode when the lamp is mounted. 29. The lamp socket according to claim 28, wherein the third electrode is connected to one of the first electrode and the second electrode via a lamp electrode. 30. The lamp socket according to claim 28, wherein the third electrode is connected by moving one of the first electrode and the second electrode in a lamp mounted state. 31. The lamp socket according to claim 28, wherein the third electrode is connected after at least one of the first electrode and the second electrode when the lamp is mounted. 32. The lamp socket according to claim 27, wherein the third electrode is connected to one of the first electrode and the second electrode when the lamp is not mounted.