JP4078930B2 - Discharge lamp starter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a discharge lamp starting device that is equipped with a discharge lamp and can generate a high voltage necessary for starting the discharge lamp.
[0002]
[Prior art]
As this type of discharge lamp starting device, there is one disclosed in Japanese Patent No. 3090448, FIG. 7 is a perspective view in which a part of the discharge lamp starting device is cut out, and FIG. 8 is a state in which the lid is removed. FIG. 9 is a perspective view of the main wiring component. The discharge lamp starting device includes a socket portion 1 in which a discharge lamp is detachably mounted, a connector portion 61 for electrical connection with the outside, a plurality of electronic components, and at least a part of these electronic components. A start circuit unit 10 that includes a lead frame 13 that is connected to form a wiring path between the electronic components and starts by applying a high voltage to the discharge lamp, and a case 14 in which the start circuit unit is mounted. Configured. The case main body 2 is formed by integrally providing the outer shell of the socket portion 1 and the outer shell of the connector portion 61 with the case.
[0003]
In this case, a plurality of lead frames as shown in FIG. 9 are not used for wiring of electronic components 10b such as a discharge gap, a capacitor, an inductor, and a pulse transformer housed in the starting circuit unit 10 but using a printed circuit board. The wiring of each electronic component 10b is performed by connecting the terminal of the electronic component 10b to the thing formed by bending 13, ie, a strip-shaped conductor.
[0004]
The discharge lamp starting device configured as described above can wire and arrange each electronic component 10b in the case body 2 by the lead frame 13 in a three-dimensional manner. Therefore, another electronic component 10b can be easily placed in the space above the electronic component 10b, which is difficult when two-dimensional wiring such as a printed board is performed. Thereby, the space in the case 14 in which the starting circuit unit 10 is mounted can be used more effectively, and as a result, the fluorescent lamp starting device can be downsized. In particular, when this discharge lamp starting device is used for a headlight for an automobile, it is required to reduce the space occupied by the vehicle, so that the lead frame 13 described above is useful.
[0005]
[Patent Document 1]
Japanese Patent No. 3090448 (first page, FIG. 5)
[0006]
[Problems to be solved by the invention]
However, when the circuit configuration of the starting circuit unit 10 is changed or the size of the electronic component 10b is changed, the above-described discharge lamp starting device also requires a change in the lead frame 13 wiring these components. There is. However, in many cases, the lead frame 13 is insert-molded in advance in the case body 2 to fix the electronic component 10b, or the processing is complicated by three-dimensional bending. The change of the frame 13 requires a change of its own mold, a change of equipment for insert molding, and the like, and this requires cost and time.
[0007]
Here, the circuit configuration of the starting circuit unit 10 and the size of the electronic component 10b are changed, for example, when an alternative component is used due to the end of production of the electronic component 10b, or when the discharge lamp starting device is used for an automobile or the like. There are times when it changes to the specification which corresponds to. In particular, when the vehicle type changes, the wiring distance between the lighting circuit unit for supplying power to the discharge lamp provided separately from the discharge lamp starting device and lighting it, and the discharge lamp starting device changes, thereby starting the discharge lamp. The characteristics of noise generated from the device may change. In this case, it is necessary to appropriately change the power supply filter for reducing the noise, that is, the constants of the inductor and the capacitor constituting the power supply filter or the circuit configuration thereof according to the change in the noise characteristics.
[0008]
The present invention has been made in view of the above-described reasons, and an object thereof is to provide a discharge lamp starting device capable of improving the degree of freedom of wiring to electronic components.
[0009]
[Means for Solving the Problems]
A discharge lamp starting device according to a first aspect of the present invention is a socket part to which a discharge lamp having electrodes is mounted, one of which is connected to the electrode of the discharge lamp at the periphery or inside of the socket part and the other is drawn out of the socket part. A plurality of electronic components including at least one pulse transformer capable of generating a high voltage pulse and a wiring path between the electronic components connected to at least a part of the plurality of electronic components A discharge circuit comprising a lead frame that forms a starting circuit that can be activated by applying a high voltage to the discharge lamp, and a case body that houses the activation circuit and is formed integrally with the socket. in lamp starter device, connected by wires having flexibility between at least a portion discharge lamp terminal of the power filter to reduce the noise of the electronic components configuring the start circuit unit Characterized in that was.
[0011]
A discharge lamp starting device according to a second aspect of the present invention is the discharge lamp starting device according to the first aspect , wherein the starting circuit unit supplies electric power to the discharge lamp provided outside the discharge lamp starting device to turn on the electric power. It has an input terminal part which receives supply, and a part of terminal of this input terminal part and a part of terminal of the terminal part for discharge lamps were connected with a flexible lead. .
[0012]
According to a third aspect of the present invention, there is provided the discharge lamp starting device according to the first or second aspect , wherein the flexible conductive wire is insert-molded in a socket body.
[0013]
According to a fourth aspect of the present invention, there is provided a discharge lamp starting device according to any one of the first to third aspects, wherein a high-intensity discharge lamp is attached to the socket portion.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a discharge lamp starting device, and FIG. 2 is an overall circuit diagram when this is connected to other components.
[0015]
This discharge lamp starting device has a socket part 1 to which a discharge lamp LA having electrodes is mounted, one of which is connected to the electrode of the discharge lamp LA at the periphery or inside of the socket part 1, and the other is drawn out of the socket part 1. The plurality of electronic components 10b including at least one pulse transformer PT capable of generating a high voltage pulse and the discharge lamp terminal portion 3 and at least a part of the plurality of electronic components 10b are connected to the respective electronic components 10b. A lead frame 13 that forms a wiring path between them and a start circuit unit 10 that can be started by applying a high voltage to the discharge lamp LA, and the start circuit unit 10 is housed and formed integrally with the socket unit 1 The case main body 2 and an input terminal portion 6 for supplying power to the starting circuit are provided.
[0016]
The socket portion 1 is formed of a synthetic resin into a bottomed cylindrical shape, and a lamp mounting opening for mounting the lamp is provided on the opening at the tip thereof so as to protrude outward from the case body 2. A cylindrical bottom portion is formed integrally with the case body 2.
[0017]
The discharge lamp terminal portion 3 has a central discharge lamp terminal 3a that is in contact with the central electrode of the base of the discharge lamp LA, one of which is embedded in the central portion of the socket portion 1 and the other is drawn out of the socket portion 1. The peripheral discharge lamp terminal 3b that contacts the outer peripheral electrode of the base of the discharge lamp LA, one attached to the periphery of the socket part 1 and the other drawn out of the socket part 1, and the central discharge lamp terminal 3a An auxiliary fluorescent lamp terminal 3c provided in the same configuration as the outer peripheral discharge lamp terminal 3b is provided at a peripheral position of the socket portion 1 facing the outer peripheral discharge lamp terminal 3b. The auxiliary fluorescent lamp terminal 3c and the peripheral discharge lamp terminal 3b are connected to each other by electrodes on the outer periphery of the base when the base of the discharge lamp LA is inserted.
[0018]
The activation circuit unit 10 can be activated by applying a high voltage to the discharge lamp LA. For example, the discharge gap SG, the capacitors CC, CS, the inductor LF, the resistor R, and a pulse transformer PT that can generate a high voltage pulse. And a lead frame 13 connected to at least a part of the plurality of electronic components 10b to form a wiring path between the electronic components 10b.
[0019]
8 and 9, the lead frame 13 is formed by bending a strip-shaped conductor, and terminals (leads) of the electronic component 10b are placed on the respective points. A concave groove 13a for connection and an insertion hole 13b for insertion and connection are provided. The terminals (leads) of the electronic component 10b and the lead frame 13 are connected by appropriate means such as laser welding, spot welding, resistance welding, caulking, or soldering, thereby wiring between the electronic components 10b. A path is formed, which eliminates the need for a printed circuit board.
[0020]
The case main body 2 is formed of a synthetic resin in the shape of a generally shogi piece. The case main body 2 houses the starter circuit portion 10 therein and is integrated with the above-described bottomed cylindrical portion of the socket portion 1. Molded.
[0021]
The input terminal unit 6 is connected to an electric wire 60 for supplying power to the starting circuit unit 10 from the lighting circuit unit 8 for supplying electric power to a discharge lamp provided separately from the discharge lamp starting device. This is provided for the purpose, and is connected to the lead frame 13 inside the case body 2.
[0022]
What is important here is that at least a part between the starting circuit portion 10 and the discharge lamp terminal portion 3 is connected by a conductive wire 7 having flexibility. Specifically, between the inductor LF and the peripheral discharge lamp terminal 3b constituting the power filter for noise reduction, and between the capacitor CS and the peripheral discharge lamp terminal 3b constituting the power filter for noise reduction. Are connected by a conductive wire 7 having flexibility. Furthermore, the terminal (or the lead frame 13 connected to the terminal) to which the flexible conductive wire 7 of the inductor LF and the capacitor CS is connected is a top view of the mounting surface of the electronic component 10b of the activation circuit unit 10. In addition, the electronic component 10b and the lead frame 13 are not obstructed.
[0023]
Next, a method for manufacturing the discharge lamp starting device will be described. The electronic component 2b and the remaining lead frame 13 are positioned toward the bottom of the case body 2 on the case body 2 to which a part of the discharge lamp terminal portion 3 and the lead frame 13 are attached by simultaneous molding (insert molding) or the like. It will be implemented sequentially from the thing. At this time, the electronic component 2b and the lead frame 13 are connected by appropriate means such as laser welding, spot welding, resistance welding, caulking, or soldering. After the connection of the electric wires to the input terminal portion 6 and the mounting of all the electronic components 2b and the lead frame 13, the connection between the inductor LF and the peripheral discharge lamp terminal 3b and the capacitor CS and the peripheral discharge lamp are completed. The terminals 3b are connected by flexible conductive wires 7, respectively. This connection is performed by appropriate means such as laser welding, spot welding, resistance welding, caulking, or soldering.
[0024]
In addition, when the vehicle type to be used is changed and the capacitor CS and the inductor LF constituting the power supply filter are changed according to this, the following is performed. First, the shape of the capacitor CS and the inductor LF is reduced, but there is no particular change when the pitch between the terminals does not change. Next, when the pitch between the terminals becomes narrow, the lead frames 13CS and 13LF to which the capacitor CS and the inductor LF are attached are changed to those having a shorter pitch, or the forming of the terminals of the capacitor CS and the inductor LF is changed before the change. Lead frames 13CS and 13LF can be used. At this time, when the lead frames 13CS and 13LF are changed to those having a short pitch, by changing the length of the flexible conductive wire 7 described above, between the inductor LF and the peripheral discharge lamp terminal 3b, and The capacitor CS and the outer peripheral discharge lamp terminal 3b may be connected. In addition, what is necessary is just to carry out similarly to this, when the position where a terminal is pulled out changes.
[0025]
Further, when the shape of the capacitor CS or the inductor LF is increased, it affects the entire components constituting the starter circuit unit 10, so that the lead frame 13 is significantly changed and the position of the electronic component 10b is moved accordingly. It will be a thing. However, between the inductor LF and the outer peripheral discharge lamp terminal 3b and between the capacitor CS and the outer peripheral discharge lamp terminal 3b, the length and the bending method are connected by a flexible conductor 7 that can be changed as appropriate. Therefore, the degree of freedom of wiring during this period can be improved. Therefore, since the inductor LF and the capacitor CS can be arranged at a position where the change of the lead frame 13 can be reduced as much as possible, the types of the lead frames 13 to be aligned are compared with the case where the flexible conductive wire 7 is not used. Less. In addition, the time required for the design can be shortened.
[0026]
According to this embodiment, since at least a part between the starting circuit portion 10 and the discharge lamp terminal portion 3 is connected by the flexible conductive wire 7, it is compared with that using the lead frame 13. The degree of freedom of wiring to the electronic component can be improved. Therefore, the electronic component 10b connected to the flexible conductive wire 7 is smaller in the electronic component 10b connected to the flexible conductive wire 7 than the case where the electronic component 10b is connected by the lead frame 13, for example. Even if the position of the terminal is changed or the position of the terminal is changed, the wiring path can be flexibly changed and connected. Even when the electronic component 10b connected to the flexible conductive wire 7 is changed to a large one and the arrangement of the electronic component 10b constituting the activation circuit 10 and the arrangement and shape of the lead frame 13 need to be changed. Since the electronic component 10b connected to the flexible conductive wire 7 has a higher degree of freedom in arrangement because the position restriction by the wiring path is reduced, the electronic component 10b affected by the increase in the size is increased. In addition, the electronic component 10b component connected to the conductive wire 7 can be disposed at a position where the lead frame 13 is minimized. Therefore, it is possible to reduce the change of the lead frame 13 that is three-dimensionally bent and the change of the equipment for insert molding the lead frame as much as possible, and the cost and time for this can be reduced.
[0027]
In particular, between the at least part of the power supply filter for reducing noise in the electronic component 10b constituting the starter circuit unit 10 and the discharge lamp terminal unit 3, the flexible conductor 7 is specifically described. If it is connected between the inductor LF and the peripheral discharge lamp terminal 3b and between the capacitor CS constituting the power filter and the peripheral discharge lamp terminal 3b, the noise characteristics of the fluorescent lamp starting device can be easily changed. For example, it is useful when the noise characteristics of the discharge lamp starting device are required to be changed depending on the vehicle type, for example, in an automobile.
[0028]
Furthermore, the terminal (or the lead frame 13 connected to the terminal) to which the flexible conductive wire 7 of the inductor LF and the capacitor CS is connected is a top view of the mounting surface of the electronic component 10b of the activation circuit unit 10. In addition, since the arrangement is such that it is not obstructed by the electronic component 10b or the lead frame 13, the flexible conductor 7 is attached, that is, laser welding, spot welding, resistance welding, caulking, soldering, etc. Work becomes easy.
[0029]
Next, a first application example of the discharge lamp starting device will be described with reference to FIGS. FIG. 3 is a perspective view of the discharge lamp starting device, and FIG. 4 is an overall circuit diagram when this device is connected to other components. In this application example, the place where the above-described flexible conducting wire 7 is connected is changed. In this device, a part of the terminals of the input terminal part 6 and a part of the terminals of the discharge lamp terminal part 3 are connected by a conductive wire 7 having flexibility. Specifically, the voltage terminal of −380 V outputted from the lighting circuit unit 8 is connected to the input terminal unit 6 a for bypassing the input terminal unit 6 and merely bypassing the starting circuit unit 10 by the electric wire 60, and bypassed. The input terminal portion 6a and the peripheral discharge lamp terminal 3b are connected by a conductive wire 7 having flexibility.
[0030]
In the lead frame 13, the bypass input terminal portion 6a having the longest wiring length and the peripheral discharge lamp terminal 3b are connected by a flexible conductor 7. Accordingly, the longer the wiring length, the greater the influence on the electronic component 10b and other lead frames 13, and in order to increase the degree of freedom of the arrangement and shape of these, a part of the terminals of the input terminal portion 6 and the discharge lamp It is more useful to connect a part of the terminals of the terminal portion 3 with a flexible conducting wire 7.
[0031]
The flexible conductor 7 shown in the embodiments and application examples may be an electric wire with insulation coating, and in this case, it is not necessary to consider the shortage of the insulation distance due to the bending of the conductor 7. Higher density wiring is possible. Moreover, the flexible conducting wire 7 may be insert-molded in the bottom portion of the case body 2 as shown in FIG. 5, and in this case as well, higher-density wiring is possible. Further, as shown in FIG. 6, the discharge lamp starting device described above includes a cover 20 formed of a synthetic resin for the starting circuit unit 10 housed in the case body 2, and an insulating cover formed of an insulator such as a fiber. 30, and a shield cover 40 for reducing radio noise generated from the activation circuit unit 10 in the space.
[0032]
In addition, if the high-intensity discharge lamp is connected to the socket part 1, the discharge lamp starting device can be used as a headlamp for automobiles. It becomes more useful.
[0033]
【The invention's effect】
In the first aspect of the present invention, a socket part to which a discharge lamp having an electrode is attached, one of which is connected to the electrode of the discharge lamp at the periphery or inside of the socket part and the other is drawn out of the socket part. A plurality of electronic parts including at least one pulse transformer capable of generating a high voltage pulse and a terminal part for a discharge lamp, and a wiring path between the electronic parts are formed by being connected to at least a part of the plurality of electronic parts. A discharge lamp starter comprising: a start circuit portion that includes a lead frame that can be started by applying a high voltage to the discharge lamp; and a case body that houses the start circuit portion and is formed integrally with the socket portion in the apparatus, it has connected by wires having flexibility between at least a portion discharge lamp terminal of the power filter to reduce the noise of the electronic components configuring the start circuit unit More, even when the size of the power filter is changed, since the wiring to which tends to become that easily change the noise characteristics of the fluorescent lamp starting device compared to those using a lead frame.
[0035]
In the invention according to claim 2 , the start-up circuit unit includes an input terminal unit that receives power supply from a lighting circuit unit that supplies power to the discharge lamp provided outside the discharge lamp starting device. And a part of the terminals of the input terminal part and a part of the terminals of the discharge lamp terminal part are connected by a flexible conducting wire. In addition to the effects of the above, the lead input frame for the longest wiring length in the lead frame and the peripheral discharge lamp terminal are connected by a flexible conductive wire. The influence on components and other lead frames is large, and it becomes more useful in increasing the degree of freedom of arrangement and shape of electronic components and other lead frames.
[0036]
According to a third aspect of the present invention, the flexible conductive wire is insert-molded in the socket body, so that the effect of the first or second aspect can be obtained and a higher-density wiring is provided. Is possible.
[0037]
In the invention according to claim 4 , when the high-intensity discharge lamp is attached to the socket portion, the effect according to claims 1 to 3 can be obtained and the headlight can be used as an automobile headlamp. It becomes possible, and it becomes more useful for a market with a strong demand for miniaturization.
[Brief description of the drawings]
FIG. 1 is a perspective view of a discharge lamp starting device according to an embodiment of the present invention.
FIG. 2 is an overall circuit diagram when the discharge lamp starting device is connected to other components.
FIG. 3 is a perspective view showing a first application example of the above-described discharge lamp starting device.
FIG. 4 shows a first application example of the above-described discharge lamp starting device, and is an overall circuit diagram when this is connected to other components.
FIG. 5 is a perspective view showing a second application example of the above-described discharge lamp starting device.
FIG. 6 is a perspective view showing a third application example of the above-described discharge lamp starting device.
FIG. 7 is a perspective view in which a part of a discharge lamp starting device according to a conventional example is cut away.
FIG. 8 is a plan view of the discharge lamp starting device according to the conventional example with the lid removed.
FIG. 9 is a perspective view of main wiring components of the discharge lamp starting device according to the conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Socket part 2 Case main body 3 Terminal part 3a for discharge lamps Terminal 3b for central discharge lamps Terminal 3b for outer periphery discharge lamps Terminal 6 for auxiliary fluorescent lamps Input terminal part 6a Input terminal part 6a for bypass
7 Conductive Wire 10 with Flexibility Start Circuit Unit 10b Electronic Component 13 Lead Frame 60 Electric Wire CS Capacitor LF Inductor

Claims (4)

A socket part to which a discharge lamp having electrodes is mounted; a terminal part for a discharge lamp in which one is connected to the electrode of the discharge lamp at the periphery or inside of the socket part and the other is drawn out of the socket part; and a high voltage pulse The discharge lamp includes a plurality of electronic components including at least one pulse transformer that can be generated, and a lead frame that is connected to at least a part of the plurality of electronic components to form a wiring path between the electronic components. In a discharge lamp starting device comprising: a starting circuit unit that can be started by applying a high voltage; and a case main body that houses the starting circuit unit and is formed integrally with a socket unit, an electronic device constituting the starting circuit unit A discharge lamp starter characterized in that at least a part of a power supply filter for reducing noise among components and a discharge lamp terminal portion are connected by a flexible conductive wire . The start-up circuit unit has an input terminal unit that receives power supply from a lighting circuit unit that supplies power to the discharge lamp provided outside the discharge lamp starting device and lights it, and a part of the input terminal unit 2. The discharge lamp starting device according to claim 1, wherein the terminal and a part of the terminal of the discharge lamp terminal portion are connected by a flexible conductive wire . The discharge lamp starting device according to claim 1 or 2, wherein the flexible conductive wire is insert-molded in a socket body . The discharge lamp starting device according to any one of claims 1 to 3, wherein a high-intensity discharge lamp is attached to the socket portion .

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