JP3788813B2 - Light source device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pulse lighting type light source device, and more particularly to a light source device using a xenon flash lamp.
[0002]
[Prior art]
A light source such as a xenon lamp generates heat as it emits light. In particular, in a direct current lighting type xenon lamp device that generates a large amount of heat, a heat dissipation technique such as Japanese Patent Publication No. 4-80365 (Japanese Patent Laid-Open No. 59-14838) has been conventionally used. It has been adopted. That is, a cooling fan is attached to the xenon lamp, and the cooling air is passed through the vicinity of the xenon lamp and the heat radiating plate to prevent a high temperature from being so-called air cooling.
[0003]
On the other hand, the pulse lighting type xenon lamp device generates less heat than the direct current lighting type, so a special cooling method is not adopted, and cooling air from a cooling fan is directly applied to the xenon lamp itself. Met.
[0004]
[Problems to be solved by the invention]
For this reason, the conventional pulse lighting type light source device has a problem that the amount of emitted light decreases when dust, oil particles, etc. contained in the cooling air adhere to the lamp, especially when these adhere to the light exit window of the lamp. It was.
[0005]
In addition, when the cooling technology developed for the DC lighting type is adopted in the pulse lighting type light source device, the configuration becomes complicated and large, and it is difficult to realize a handy lighting device by housing it in a case (housing). It was.
[0006]
SUMMARY OF THE INVENTION An object of the present invention is to provide a pulse lighting type light source device in which dust or the like does not adhere to a light exit window of a lamp due to cooling air, and which can be simply configured.
[0007]
[Means for Solving the Problems]
A light source device according to the present invention includes a lamp having a side tube orthogonal to a light exit window, a trigger socket that accommodates a trigger circuit for pulsing the lamp, a cooling fan that cools the lamp and the trigger socket, a lamp, and a trigger A lamp house that houses a socket and a cooling fan inside,
The lamp house has a through hole that is fitted in such a manner that the outer surface of the side tube of the lamp comes into surface contact with the central portion, a head portion that has a vent hole that penetrates in the axial direction around the through hole, and one end side. A head part is detachably attached and a trigger socket is held inside, a body part in which an internal space communicating with a vent hole is formed around the trigger socket, and a head part is detachably attached to the other end side of the body part A cooling fan is held in the interior, and a base portion in which an internal space that communicates the internal space of the main body and the outside air is formed via the cooling fan is provided.
[0008]
According to the present invention, since the lamp is in surface contact with the head portion in the through hole, and the vent hole is formed around the through hole, the lamp does not receive the cooling air directly, and the material of the head portion is changed. It is indirectly cooled by air. For this reason, dust contained in the cooling air does not adhere to the light exit window of the lamp. The vent hole communicates with the internal space of the main body, and the trigger socket is held here, so that not only the lamp but also the trigger socket is cooled at the same time.
[0009]
On the other hand, in the pulse lighting type light source device, a high voltage of several hundred to several hundreds of volts is constantly generated in the trigger circuit of the trigger socket. Therefore, it is desirable that the trigger socket is disposed close to the lamp. It is. According to the present invention, the lamp is held by the head part, the trigger socket is held by the main body part, and the head part is attached to one end side of the main body part. Thus, the external terminal of the lamp and the external terminal of the trigger socket can be directly connected.
[0010]
And in the present invention, the cooling fan is held in the base part, and this base part is attached to the other end side of the main body part, so that the lamp house composed of the head part, the main body part and the base part is configured integrally. A compact structure in which the lamp, the trigger socket and the cooling fan are arranged and held in the axial direction can be realized. Furthermore, since each of the head portion, the main body portion, and the base portion is detachably attached to each other, it is easy to assemble the components and to easily replace the failed component.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
[0012]
FIG. 1 is a longitudinal sectional view of a light source device using a xenon flash lamp, and FIG. 2 is an exploded perspective view (partially shown in cross section).
[0013]
As shown in the figure, the cylindrical lamp house is composed of a head portion 10, a main body portion 20, and a base portion 30, and is integrated by screw connection. That is, the head portion 10 and the main body portion 20 are detachably coupled by the female screw portion 11 formed on the inner surface of the rear end portion of the head portion 10 and the male screw portion 21A formed on the inner surface of the front end portion of the main body portion 20. The main body portion 20 and the base portion 30 are detachably coupled by a male screw portion 21B formed on the outer surface of the rear end portion of the main body portion 20 and a female screw portion 31 formed on the inner surface of the front end portion of the base portion 30. . The xenon lamp 40 is accommodated in the head portion 10, the trigger socket 50 is accommodated in the main body portion 20, and the cooling fan 60 is accommodated in the base portion 30.
[0014]
As shown in detail in FIG. 3, a through hole 12 having a circular cross section and extending in the axial direction is formed in the central portion of the head portion 10, and an end of an optical fiber bundle (not shown) is formed on the front end side thereof. A female screw portion 12A for screwing the portion (connector) is formed. Further, around the through hole 12, eight vent holes 13 </ b> A to 13 </ b> H having a circular cross section penetrating similarly in the axial direction are formed.
[0015]
As shown in FIGS. 1 and 2, the substantially cylindrical xenon lamp 40 is fitted so that the outer surface of the side tube 41 and the inner surface forming the through hole 12 are in surface contact with each other, and the base plate 42 of the xenon lamp 40 is formed. The upper surface peripheral edge abuts on the rear end surface of the head 10. In this way, the xenon lamp 40 is in surface contact with the inside of the head portion 10, that is, in a state where heat conduction is good, and its exit window 43 faces the outside of the lamp house through the through hole 12. Yes.
[0016]
As shown in detail in FIG. 4, the main body 20 has a substantially cylindrical shape, and three protrusions 22A to 22C are formed on the inner surface on the front end side. As shown in FIGS. 1 and 2, the trigger socket 50 is clamped by the inner surfaces of the tips of the protrusions 22 </ b> A to 22 </ b> C and fixed by the screws 23, so that the trigger socket 50 is spatially located in the internal space 24 of the main body 20. Retained. Further, the front ends of the protrusions 22 </ b> A to 22 </ b> C are in contact with the lower surface of the peripheral portion of the base plate 42 of the xenon lamp 40, whereby the base plate 42 of the xenon lamp 40 is sandwiched between the head unit 10 and the main body unit 20. Fixed. The internal space 24 communicates with the eight vent holes 13A to 13H of the head portion 10.
[0017]
As shown in detail in FIG. 5, the xenon lamp 40 has five pins 44A to 44E projecting downward from the base plate 42, and these pins 44A to 44E are triggers shown in detail in FIG. The trigger socket 50 is inserted into the five insertion holes 51 </ b> A to 51 </ b> E at the distal end portion of the socket 50, and the distal end surface of the trigger socket 50 comes into contact with the lower surface of the xenon lamp 40. The insertion holes 51A to 51E are equivalent to the output terminals 51A to 51E of the trigger circuit shown in FIG. 7, and the trigger circuit constituted by the resistor R, the capacitor C, the diode D, and the transformer T has a GND terminal, A trigger (GND) terminal, a trigger terminal, and a Main terminal are connected to each other. Then, the cord 52 for guiding these input terminals is extended to the rear base portion 30 as shown in FIG. 1 and guided to the outside.
[0018]
As shown in detail in FIG. 8, the base portion 30 has a substantially cylindrical shape, and has a flange portion 32 extending inwardly on the rear end side, and the cooling fan 60 has four screw holes 35 </ b> A to 35 </ b> D therein. Fixed through. As shown in detail in FIG. 9, the cooling fan 60 has six blades 61 </ b> A to 61 </ b> F, which are rotated by a motor 62. The two through holes 36 and 37 formed in the base portion 30 lead the cord 52 of the trigger socket 50 and the cord 63 of the cooling fan 60 to the outside of the lamp house, respectively.
[0019]
As shown in FIG. 1, the internal space 33 of the base portion 30 communicates with the internal space 24 of the main body portion 20, which communicates with the eight vent holes 13 </ b> A to 13 </ b> H of the head portion 10. Accordingly, when the blades 61A to 61F of the cooling fan 60 are rotated by the motor 62, the outside air in front of the lamp house passes through the vent holes 13A to 13H of the head portion 10 and flows into the internal space 24 of the main body portion 20, and the base portion. The air is exhausted from the internal space 33 of the 30 through the cooling fan 60 to the outside air.
[0020]
As shown in FIGS. 1 and 4, the two female screw portions 58A and 58B formed on the side wall portion of the main body portion 20 are formed by screwing the illustrated lamp house onto a substrate (not shown) inside the lighting device. Such an illumination device is shown in FIG. The head portion 10 of the lamp house in FIG. 1 is exposed on the front panel of the housing 70 of such an illuminating device, and the connector portion 72 of the optical fiber bundle 71 is screwed to the through hole 12 in the substantially central portion.
[0021]
Next, the operation of this embodiment will be described.
[0022]
First, when manufacturing and assembling parts, the head portion 10, the main body portion 20 and the base portion 30 constituting the lamp house are molded from a material having good thermal conductivity such as aluminum, and the surface is insulated with halogen or the like. Then, the xenon lamp 40 is assembled to the head unit 10, the trigger socket 50 is assembled to the main body unit 20, and the cooling fan 60 is assembled to the base unit 30. Thereafter, when the head portion 10, the main body portion 20, and the base portion 30 are screwed together, the xenon flash lamp light source device of FIG. 1 is obtained.
[0023]
Since the light source device of this embodiment is substantially cylindrical, it is easy to handle, and the xenon lamp 40, the trigger socket 50, and the cooling fan 60 are all housed in a small unit. Furthermore, since the lamp house of the unit is assembled by screwing the head portion 10, the main body portion 20 and the base portion 30, it is easy to replace internal components such as the xenon lamp 40.
[0024]
The light source device configured as shown in FIG. 1 is housed in a housing 70 as shown in FIG. When this illumination device is used, the optical fiber bundle 71 may be screwed to the through hole 12 of the head portion, or the emitted light may be directly projected to the outside.
[0025]
Next, when the light source device is used, when the power is turned on from the connector 73 of the lighting device shown in FIG. 10 and the switch 74 on the front panel of the housing 70 is turned on, the trigger socket 50 outputs a trigger signal, The motor 62 of the cooling fan 60 is driven. As a result, the xenon lamp 40 is pulse-lit, and the cooling air flows through the inside of the lamp house while the emitted light is projected from the through hole 12 of the head portion 10.
[0026]
For this reason, the xenon lamp 40 starts to generate heat and the trigger socket 50 also generates heat. However, since the cooling air from the cooling fan 60 flows into the internal space 24 of the main body 20 through the vent holes 13A to 13H of the head unit 10, The lamp 40 and the trigger socket 50 are efficiently air-cooled. In other words, the xenon lamp 40 is indirectly cooled through the head portion 10 in surface contact, and the trigger socket 50 is cooled by being in direct contact with the cooling air.
[0027]
In this case, since the cooling air is guided to the inside through the vent holes 13 </ b> A to 13 </ b> H of the head portion 10, no air flow is generated inside the through hole 12 of the head portion 10. Therefore, dust or the like does not adhere to the exit window 43 of the xenon lamp 40, and the emitted light intensity does not deteriorate. In addition, since the cooling efficiency is sufficiently high, problems such as explosion of the xenon lamp 40 at a high temperature, a decrease in conversion efficiency of the transformer T of the trigger circuit, and disconnection of the resistor R can be avoided.
[0028]
The present invention is not limited to the above embodiment, and various modifications are possible. For example, the lamp house is not limited to a cylindrical shape, and may be a prismatic shape. The cross section of the vent hole in the head portion may be a bent rectangular shape.
[0029]
【The invention's effect】
According to the light source device of the present invention, cooling air can be cooled without being applied to the exit window of the lamp, so that dust in the air does not adhere. For this reason, sufficient light output can be realized over a long period of time. In addition, since the assembly is easy and the configuration is simple, an inexpensive and compact light source device can be realized.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an embodiment of a xenon flash lamp light source device.
FIG. 2 is an exploded perspective view of the embodiment of FIG.
FIG. 3 is a front view of the head portion and a cross-sectional view taken along line AA.
FIG. 4 is a front view and a cross-sectional view taken along line AA of the main body.
FIG. 5 is a top view and a side view of a xenon lamp.
FIG. 6 is a top view and a side view of a trigger socket.
FIG. 7 is a circuit diagram of a trigger circuit.
FIG. 8 is a front view and a cross-sectional view taken along line AA of the base portion.
FIG. 9 is a front view of a cooling fan.
10 is a perspective view of a lighting device incorporating the embodiment of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Head part, 12 ... Through-hole, 13A-13H ... Vent hole, 20 ... Main-body part, 30 ... Base part, 40 ... Xenon lamp, 50 ... Trigger socket, 60 ... Cooling fan.

Claims (1)

A lamp having a side tube orthogonal to the light exit window; a trigger socket that houses a trigger circuit that pulses the lamp; a cooling fan that cools the lamp and the trigger socket; the lamp; the trigger socket; A lamp house that houses the cooling fan inside,
The lamp house is
A head portion having a through hole that is fitted in such a manner that the outer surface of the side tube of the lamp is in surface contact, and having a vent hole penetrating in the axial direction around the through hole;
A main body portion in which the head portion is detachably attached to one end side, the trigger socket is held inside, and an inner space communicating with the vent hole is formed around the trigger socket;
A base part that is detachably attached to the other end of the main body part, holds a cooling fan inside, and has an internal space that communicates the internal space of the main body part with outside air through the cooling fan;
A light source device comprising:

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