JP2004335113A - Light source device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light source device which does not prevent cooling at normal use, completely completely trapping fragments inside the lighting device in case of the explosion of a lamp. <P>SOLUTION: A vent hole 24 for cooling the lamp 12 and an another opening 26 independent from the vent hole 24 are formed at an exchanging side of a lamp housing 20 arranged so as to surround the lamp. A movable body 42 is arranged between a release position keeping away from the vent hole 24 and a blocking position blocking the vent hole 24 in free movement. A detection plate 50 receiving a pressure wave generated by the blowout of the lamp is fitted at the opening 26. The movable body 42 is moved toward the blocking position in conjunction with an operation of the detection plate 50 receiving the pressure wave. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a light source device mounted on a projection display device or the like.
[0002]
[Prior art]
As a light source of a light source device mounted on a projection display device such as a liquid crystal projector, a high-pressure discharge lamp such as a high-pressure mercury lamp or a metal halide lamp is often used. This type of high-pressure discharge lamp has a very high internal pressure during operation, and may occasionally burst during operation. When the high-pressure discharge lamp ruptures, the fragments are scattered to the outside of the light source device and the projection type display device. Therefore, such a light source device has been conventionally provided with a fragment scatter prevention structure.
[0003]
As a conventional debris scattering prevention structure, there is one in which a cooling air passage in a light irradiation unit is covered by a mesh member through which debris of a lamp cannot pass (for example, see Patent Document 1).
[0004]
As another conventional debris scattering prevention structure, there is a structure in which a vent in a light source device is closed by a shutter mechanism that is driven by using wind pressure generated by a blast when a light source lamp ruptures (for example, Patent Document 2). reference.).
[0005]
[Patent Document 1]
JP-A-10-223203
[Patent Document 2]
JP 2002-352604 A
[0006]
[Problems to be solved by the invention]
However, according to the technology disclosed in Patent Document 1, fragments smaller than the mesh size of the mesh member fly outside through the mesh member. For this reason, the fragments when the high-pressure discharge lamp bursts cannot be completely confined inside the light source device. Further, since the mesh member covers the passage of the cooling air, if the mesh size of the mesh member is reduced, cooling will be hindered.
[0007]
Further, in the technology disclosed in Patent Document 2, since the rotating member that closes the ventilation hole in response to the blast of the lamp is provided in the ventilation hole, the rotating member closes the ventilation hole even in a normal use state. Part of it was blocked, which also hindered cooling.
[0008]
Therefore, an object of the present invention is to provide a light source device that does not hinder cooling in a normal use state, and that when a lamp ruptures, the fragments can be completely enclosed in the light source device. It is in.
[0009]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a lamp, a vessel having a vent for cooling the lamp and an opening for transmitting pressure waves from the inside, and disposed so as to surround the lamp. A movable body movable between an open position avoiding the vent and a closed position closing the vent, and a detecting unit provided at the opening and receiving a pressure wave passing through the opening, And a vent blocking mechanism for moving the movable body toward the closed position in response to an operation in which the detection unit receives the pressure wave.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a plan view showing a light source device according to Embodiment 1 of the present invention, FIG. 2 is a side view showing the same light source device, and FIG. 3 is an exploded perspective view of the light source device.
[0011]
This light source device is used, for example, as a light source of a liquid crystal projector device or a DLP projector device employing a digital light processing method, and includes a lamp unit 10 having a built-in lamp 12, a replacement lamp housing 20, and And a vent blocking mechanism 40.
[0012]
The lamp unit 10 includes a lamp 12, a substantially semi-spherical reflecting member 14 having an inner surface formed as a concave reflecting mirror, and a front plate 18 formed of a translucent material.
[0013]
As the lamp 12, a high-pressure discharge lamp such as a high-pressure mercury lamp or a metal halide lamp is used. The lamp 12 is inserted and fixed to a neck 15a inside the reflection member 14. The light emitted from the lamp 12 is directly or reflected by a concave reflecting mirror, passes through the front plate 18, and is emitted to the front of the lamp unit 10.
[0014]
The lamp unit 10 is provided with a vent 16. In the present embodiment, substantially rectangular ventilation holes 16 are formed on both sides of the reflection member 14 of the lamp unit 10, respectively. Through the vent 16, cooling air is introduced and exhausted between the internal space and the external space of the lamp unit 10, and the lamp 12 is cooled.
[0015]
Further, an opening 17 different from the vent 16 is formed in the lamp unit 10 (see FIG. 1). In the present embodiment, a substantially rectangular opening 17 is formed below the reflecting member 14. The opening 17 is formed at a position facing an opening 26 (see FIG. 3) described later. The pressure wave caused by the rupture of the lamp 12 is transmitted to the opening 17.
[0016]
The replacement-side lamp housing 20 is configured as a container disposed so as to surround the lamp unit 10. In the present embodiment, the replacement-side lamp housing 20 is formed in a housing that is open at the top, and surrounds the lower part of the lamp unit 10 and the front, rear, left and right sides. After all, the reflection member 14 and the main replacement side lamp housing 20 can be said to be a container arranged so as to surround the lamp 12.
[0017]
In the present embodiment, the lamp unit 10 and the replacement lamp housing 20 form a replacement lamp unit 22.
[0018]
The replacement lamp unit 22 is detachably fixed to a fixed lamp housing 30 fixed to the apparatus main body side by a dedicated metal fitting. In the normal use state of the light source device as a light source, the replacement lamp unit 22 is fixedly mounted on the fixed-side lamp housing 30. When the lamp 12 is worn out or bursts, the whole replacement lamp unit 22 is replaced with another new replacement lamp unit 22.
[0019]
The replacement-side lamp housing 20 has a vent 24 for cooling the lamp 12 and an opening 26 different from the vent 24.
[0020]
Two vents 24 are formed at positions corresponding to the two vents 16 of the lamp unit 10. That is, the substantially rectangular ventilation holes 24 are formed at positions on both sides of the replacement-side lamp housing 20 in front of each other.
[0021]
The fixed-side lamp housing 30 includes a cooling duct 19 having an opening facing the ventilation port 24, and each ventilation port 24 is provided with an air-blowing fan (not shown) provided outside through the cooling duct 19. It is connected to the.
[0022]
The opening 26 is formed at a position corresponding to the opening 17 of the lamp unit 10. That is, a substantially rectangular opening 26 is formed at a position in front of the bottom of the replacement-side lamp housing 20.
[0023]
4 is a perspective view showing the vent blocking mechanism 40, FIG. 5 is a plan view showing the vent blocking mechanism 40, FIG. 6 is a side view showing the vent blocking mechanism 40, and FIG. FIG.
[0024]
The vent blocking mechanism 40 includes a movable body 42, a detection plate 50, and a transmission mechanism 60. The movable body 42 and the detection plate 50 are attached to the support case member 46. In this embodiment, the vent blocking mechanism 40 is attached and fixed to the replacement side lamp housing 20 via the support case member 46 and the like, but is attached and fixed to the fixed side lamp housing 30 or the lamp unit 10. Configuration.
[0025]
The movable body 42 is configured to be movable between an open position avoiding the vent hole 24 (see FIGS. 2 and 8) and a closed position (see FIGS. 11 and 12) that closes the vent hole 24. I have. In the present embodiment, each movable body 42 is formed in a long plate shape having a larger spread than the ventilation port 24. One end (lower end) of the two movable bodies 42 is fixedly connected by a first shaft (first shaft) 44, and the two movable bodies 42 are integrally moved between an open position and a closed position. Moving.
[0026]
The support case member 46 is formed in a housing having an opening larger than the opening 26. The support case member 46 is attached and fixed to the lower surface of the bottom of the replacement side lamp housing 20 by screwing or the like with the opening facing the opening 26 so as to cover the opening 26. A space is formed in the support case member 46 to such an extent that it does not prevent a later-described detection plate 50 from changing its posture between a closed posture and an inclined posture.
[0027]
The first shaft 44 is inserted through the support case member 46 and is rotatably supported, so that each of the movable bodies 42 is movably supported on the side of the replacement side lamp housing 20.
[0028]
The detection plate 50 is provided in the opening 26, and performs a predetermined detection operation by receiving a pressure wave due to the burst of the lamp 12. In the present embodiment, detection plate 50 is formed in a plate shape having a shape and a size in plan view corresponding to opening 26. Further, a pair of support pieces 52, 52 are extended on both sides of the detection plate 50, and a second shaft (second shaft) 54 is fixed to each of the extension pieces 52 in a non-rotating state. The second shaft 54 is rotatably supported by the support case member 46. Accordingly, the detection plate 50 is rotated and inclined so as to protrude outward by receiving the pressure wave (see FIG. 11, hereinafter referred to as the inclined posture). ) Is supported so that the posture can be freely changed. Then, as a predetermined detection operation, the detection plate 50 performs an operation of rotating from the closed posture to the inclined posture and changing the posture.
[0029]
Note that the rotation axis of the first shaft 44 is at a position deviated from the rotation axis of the second shaft 54, here, a position deviated diagonally downward.
[0030]
The transmission mechanism 60 has a function of moving the movable body 42 toward the closed position in conjunction with the operation in which the detection plate 50 receives the pressure wave, and more specifically, the operation of rotating the detection plate 50 in response to the pressure wave. Is transmitted as an operation of rotating the movable body 42 toward the closed position.
[0031]
Here, the transmission mechanism 60 includes a cam plate 62 attached and fixed to one end of the second shaft 54 in a non-rotating state, and a cam follower 64 protruding from the base end side of the movable body 42.
[0032]
The cam plate 62 is formed in a substantially fan-shaped plate shape in plan view, and one apex portion is fixedly attached to one end of the second shaft 54 in a non-rotating state. The cam plate 62 rotates in synchronization with the detection plate 50 inside the movable body 42 on one side.
[0033]
The cam plate 62 has a first groove portion along an arc centered on the rotation axis of the second shaft 54 and a second groove portion extending from the outer peripheral side to the inner peripheral side (second shaft 54) of the cam plate 62. A substantially L-shaped cam groove 63 having a groove portion is formed (see FIGS. 8 to 11).
[0034]
The cam follower 64 protrudes from the inner surface on the base end side of the one movable body 42 toward the inside thereof, and is inserted and arranged in the cam groove 63.
[0035]
The rotation of the detecting plate 50 is transmitted from the cam groove 63 of the cam plate 62 to the movable body 42 via the cam follower 64. This operation will be described later in detail.
[0036]
Further, the ventilation port blocking mechanism 40 includes a first urging unit for urging the movable body 42 toward the closed position in a state where the movable body 42 has moved to the closed position, and the detection plate 50 generates a pressure wave. A single coil spring 70 is provided as urging means that functions as second urging means for urging the movable body 42 to the open position side in a normal use state before receiving.
[0037]
One end of the coil spring 70 is connected and fixed to one side of the exchange-side lamp housing 20 and in front of the movable body 42 (see FIG. 2), and the other end is an outer peripheral portion of the cam plate 62. It is attached in an extended state while being connected and fixed to the outer portion of the cam groove 63. When the detection plate 50 is in the closed position, the coil spring 70 is extended at a position lower than the rotation axis (the second shaft 54) of the detection plate 50 and the cam plate 62. It is biased toward the closed position (see FIG. 8). On the other hand, when the detection plate 50 is in the tilted posture, the coil spring 70 is stretched at a position above the rotation axis of the detection plate 50 and the cam plate 62, and the detection plate 50 is turned to the tilted posture. It is energized (see FIG. 12 and the like).
[0038]
That is, when the detection plate 50 is located at a position higher than the predetermined position between the closed position and the inclined position, the coil spring 70 biases the detection plate 50 toward the closed position. Then, the movable body 42 is urged toward the open position. Conversely, when the detection plate 50 is at a position other than the above-described tilted posture, the coil spring 70 urges the detection plate 50 toward the tilted posture, and thereby urges the movable body 42 toward the closed position.
[0039]
Note that, instead of such a coil spring 70, a coil spring having only a function as a first urging means for urging the movable body 42 toward the closed position, or the movable body 42 is urged toward the open position side. A configuration including a coil spring having only a function as the second urging means may be employed.
[0040]
Further, the ventilation port blocking mechanism 40 is provided with a coil spring 72 as a biasing unit that constantly biases the movable body 42 toward the closed position.
[0041]
One end of the coil spring 72 is connected to and fixed to the front side of the movable body 42 at one side of the exchange-side lamp housing 20 (see FIG. 2), and the other end of the coil spring 72 is substantially the middle of the movable body 42 in the longitudinal direction. And is attached in an extended state while being connected and fixed to the. Note that the urging force of the coil spring 72 is smaller than the urging force of the coil spring 70.
[0042]
The coil spring 72 plays a role of preventing the movable body 42 from rattling due to the clearance between the cam follower 64 and the cam groove 63 by constantly biasing the movable body 42 toward the closed position.
[0043]
Next, the operation of the light source device will be described with reference to FIGS.
[0044]
FIG. 8 is a diagram showing a positional relationship of the vent blocking mechanism 40 in the normal lighting state.
[0045]
In the normal lighting state, the detection plate 50 is in a substantially parallel posture along the bottom of the replacement-side lamp housing 20, and is in a closed posture in which the openings 17 and 26 are closed. In this state, the coil spring 70 pulls the cam plate 62 in a predetermined rotation direction, and this force is transmitted to the detection plate 50 via the first shaft 44, and the detection plate 50 is attached to the closed position. And is kept in the closed position.
[0046]
In this state, the movable body 42 is urged toward the open position by the engagement between the cam follower 64 and the cam groove 63. At this time, the play of the movable body 42 due to the clearance between the cam follower 64 and the cam groove 63 is suppressed by urging the movable body 42 in one direction by the coil spring 72.
[0047]
FIG. 9 is a diagram showing a state in which the detection plate 50 is inclined by a ゜ with respect to the bottom of the replacement side lamp housing 20.
[0048]
The first groove portion of the cam groove 63 is formed in an arc shape about the rotation axis of the second shaft 54, and within this range, the first groove portion is equidistant from the rotation axis of the second shaft 54. It is in. Therefore, when the rotation angle of the detection plate 50 and the cam plate 62 is within a predetermined rotation angle b 角度 (b>a; see FIG. 10), that is, the rotation angle of the detection plate 50 and the cam plate 62 is Is within the range of movement in the first groove portion of the cam groove 63, the movable body 42 does not move.
[0049]
Further, the mounting position of the coil spring 70 is set so that the length of the coil spring 70 is maximized (at a neutral point) in a state where the rotation angle of the detection plate 50 and the cam plate 62 is rotated by b ゜. ing. Therefore, when the rotation angle of the cam plate 62 is less than b °, the coil spring 70 urges the detection plate 50 toward the closed position. When the rotation angle of the cam plate 62 exceeds b ゜, the coil spring 70 urges the detection plate 50 toward the inclined posture. That is, the detection plate 50 and the cam plate 62 transition to either the closed posture shown in FIG. 8 or the maximum inclined posture shown in FIG. 11 at the rotation angle of b ゜. I do.
[0050]
For this reason, even if the detection plate 50 is slightly inclined, for example, when an impact is applied during transportation of the light source device, it is possible to prevent the movable body 42 from moving to the closed position. In other words, it is possible to prevent the movable body 42 from moving to the closed position due to a pressure wave other than the burst wave of the lamp 12.
[0051]
The force of the coil spring 70 is appropriately adjusted so that the rotation angle of the detection plate 50 and the cam plate 62 can exceed the above b ゜ by the pressure wave of the rupture of the lamp 12. In the present embodiment, since the coil spring 72 also constantly biases the movable body 42 in one direction, the force of the coil spring 70 is adjusted in consideration of the biasing force of the coil spring 72.
[0052]
FIG. 10 is a diagram illustrating a state in which the detection plate 50 has rotated by b ° with respect to the bottom of the replacement side lamp housing 20.
[0053]
That is, when the pressure wave due to the rupture of the lamp 12 is transmitted to the openings 17 and 26, the detection plate 50 is tilted to rotate in response to the pressure wave. Accordingly, when the rotation angle of the detection plate 50 exceeds b ゜, the coil spring 70 urges the cam plate 62 so that the detection plate 50 is in the inclined posture. Then, when the inclination angle of the detection plate 50 further increases and the cam follower 64 reaches the inside of the second groove portion of the cam groove 63, the force to move toward the closed position by the engagement between the cam follower 64 and the cam groove 63. Acts on the movable bodies 42, and each movable body 42 moves to the closing position to close the ventilation holes 16, 24.
[0054]
That is, the movable body 42 moves to the closed position at high speed in conjunction with the operation of the detection plate 50 receiving the pressure wave of the lamp 12. Thus, the vents 16 and 24 can be closed without delay of the fragments of the lamp 12 reaching the vents 16 and 24.
[0055]
The openings 17 and 26 are covered by a support case member 46. For this reason, the fragments of the lamp 12 that have reached the openings 17 and 26 are received by the support case member 46, and are prevented from scattering outside.
[0056]
FIG. 11 is a diagram showing a state in which the movable body 42 completely closes the ventilation holes 16 and 24, and FIG. 12 is a side view showing the entire light source device in the same state.
[0057]
In this state, the coil spring 72 urges the movable body 42 toward the closed position. This urging force is transmitted to the detection plate 50 via the cam plate 62 from the engagement structure between the cam follower 64 and the cam groove 63, and the detection plate 50 is urged toward the inclined posture. Further, the coil spring 70 also urges the detection plate 50 toward the inclined posture. Thereby, the state where the movable body 42 is located at the closing position and the detection plate 50 is located at the inclined posture is maintained.
[0058]
According to the light source device configured as described above, in the normal use state, the movable body 42 and the detection plate 50 are disposed at positions where the outflow of air through the ventilation holes 16 and 24 is not prevented. Thus, it is possible to prevent the cooling from being hindered. Further, when the lamp 12 ruptures, the movable body 42 closes the ventilation holes 16 and 24 in conjunction with the operation in which the detection plate 50 receives the pressure wave due to the rupture of the lamp 12. Can be more completely contained in the light source device.
[0059]
In addition, since it is not necessary to dispose a detection mechanism such as the detection plate 50 for detecting the rupture of the lamp 12 in the vicinity of the ventilation holes 16 and 24, a degree of freedom in structure can be obtained.
[0060]
Further, when the detection plate 50 receiving the pressure wave rotates, the movable body 42 moves toward the closing position and closes the ventilation holes 16 and 24. Therefore, the movable body 42 can be moved to the closed position by following the movement of the detection plate 50 at high speed. Therefore, the ventilation holes 16 and 24 can be closed as soon as possible without delaying the scattering of the fragments of the lamp 12, and the scattering of the fragments into the external space can be prevented.
[0061]
In a state where the movable body 42 has moved to the closing position, the movable body 42 is urged toward the closing position by the coil spring 70. For this reason, for example, even if a force that rebounds the movable body 42 is exerted due to the high-speed movement of the movable body 42, the movable body 42 is unlikely to move in the opening direction, and thus the vents 16 and 24 cannot be reopened. Is prevented. For this reason, after the lamp 12 ruptures, the movable body 42 can be kept at the lower position, and even the fragments scattered behind the lamp 12 rupture can be contained in the light source device.
[0062]
Further, in the normal use state, the movable body 42 is urged to the open position side by the coil spring 70, so that the movable body 42 is moved to the closed position side by the pressure other than the rupture of the lamp 12, for example, due to vibration due to transportation, or the like. It is difficult to move to the open position. For this reason, it is possible to prevent the malfunction of the ventilation port blocking mechanism 40.
[0063]
Moreover, the function of urging the movable body 42 toward the closed position with the movable body 42 moved to the closed position, and the open position of the movable body 42 in the normal use state before the detection plate 50 receives a pressure wave Since the function of biasing to the side is realized by the single coil spring 70, the configuration can be simplified.
[0064]
In the normal state, since the detection plate 50 closes the openings 17 and 26, the opening unnecessary for cooling is closed by the detection plate 50, and a sufficient cooling effect can be obtained.
[0065]
FIG. 13 is an enlarged perspective view of a main part showing a modification of the light source device according to the first embodiment.
[0066]
In this modification, an opening mechanism 80 for moving the movable body 42 to the open position by an operation from the outside of the replacement side lamp housing 20 which is a container surrounding the lamp 12 is provided.
[0067]
The opening mechanism 80 includes a handle 82 that is an operation unit that can be operated from the outside, a wire 84 as an operation force transmission mechanism that transmits an operation force applied to the handle 82 as a force for moving the movable body 42 to the open position. It has.
[0068]
More specifically, an opening 88h for exchanging the exchange lamp unit 22 is formed in a design body 88 that constitutes the appearance of a device (for example, a liquid crystal projector) in which the light source device is incorporated. A lid 89 is detachably attached. The handle 82 is provided on the outer surface of the replacement lid 89. The handle 82 may be movably mounted on the outer surface of the replacement lid 89. Further, the handle 82 may be detachably attached to the replacement lid 89, and the handle 82 may be detached from the replacement lid 89 and pulled.
[0069]
The wire 84 is a linear body, one end of which is connected and fixed to the cam plate 62, and the other end of which is drawn out of the design body 88 and connected and fixed to the handle 82. . Note that one end of the wire 84 may be connected to the movable body 42 or the like. In short, the movable body 42 can be moved to the open position by pulling out of the various components of the vent blocking mechanism 40. What is necessary is just to be connected and fixed to the part.
[0070]
When the handle 82 is pulled outside the design body 88 in a state where the movable body 42 is located at the closed position, the movable body 42 is forcibly moved to the open position.
[0071]
Note that, instead of the configuration using the handle 82 and the wire 84 as described above, another mechanism that can forcibly move the movable body 42 from the outside may be used as the opening mechanism 80.
[0072]
In this modification, even if the vent blocking mechanism 40 operates due to vibration, impact, or the like during transportation of a device (for example, a projection display device) incorporating the light source device, the device is opened. Without this, the vent blocking mechanism 40 can be opened. In addition, in a reverse view, when the apparatus is used in a set state, the opening mechanism 80 is used to open the ventilation port blocking mechanism 40, thereby eliminating consideration of vibration and impact due to transportation of the apparatus. be able to.
[0073]
Of course, this modification can be applied to a second embodiment described later.
[0074]
Embodiment 2 FIG.
14 and 15 are side views showing a light source device according to Embodiment 2 of the present invention. FIG. 14 shows a state in which a vent is opened, and FIG. 15 shows a state in which the vent is closed. I have. In the second embodiment, the same components as those of the light source device in the first embodiment are denoted by the same reference numerals, the description thereof will be omitted, and the description will focus on differences.
[0075]
In this light source device, instead of the vent 16, a vent 90 for introducing air is provided in the upper front part of the lamp unit 10 </ b> B corresponding to the lamp unit 10, and a neck 15 </ b> Ba on the rear side of the lamp unit 10 </ b> B is provided. A vent 91 for blowing air is provided.
[0076]
An air guide path 98 is connected to the vent 90, and air sucked by a cooling fan (not shown) is introduced into the lamp unit 10B from the air guide 98 through the vent 90. The air introduced into the lamp unit 10B is blown to the outside through the vent 91.
[0077]
In this light source device, a net 92 for preventing fragments from being scattered is provided in the vent hole 91 on the outlet side. Fragment scattering when the lamp 12 ruptures is prevented by the net 92.
[0078]
In the vent blocking mechanism 40B according to this embodiment, a pair of supporting movable members 42B and a closing movable member 43B are used instead of the pair of movable members 42.
[0079]
Each of the supporting movable bodies 42B has a length dimension protruding above the lamp unit 10B. Other configurations are the same as those of the movable body 42.
[0080]
The closing movable body 43B is formed in an elongated plate shape capable of closing the ventilation port 90, and is attached so as to bridge between the ends of the pair of supporting movable bodies 42B.
[0081]
Further, the closing movable body 43B is swingably connected and fixed to the ends of the pair of supporting movable bodies 42B. Further, an extension guide piece 20Ba is formed to extend above the replacement side lamp housing 20B corresponding to the replacement side lamp housing 20. A guide space 20Bb corresponding to the thickness of the closing movable body 43B is formed between the extension guide piece 20Ba and the upper surface of the lamp unit 10B. The closing movable body 43B is disposed in the guide space 20Bb. Then, with the rotation of the supporting movable body 42B, the closing movable body 43B moves in the guide space 20Bb while maintaining a posture substantially parallel to the upper surface of the lamp unit 10B. I have. In a state where the closing movable body 43B is disposed at a rear position in the guide space 20Bb, the closing movable body 43B is located at an open position avoiding the ventilation port 90. In addition, in a state where the closing movable body 43B is disposed at the forefront in the guide space 20Bb, it is in a state of being located at a closing position for closing the ventilation port 90.
[0082]
In other respects, the vent blocking mechanism 40B has the same configuration as the vent blocking mechanism 40 described above.
[0083]
In this light source device, the closing movable body 43B is arranged at the open position shown in FIG. 14 in a normal use state. When the lamp 12 ruptures, it receives a pressure wave due to the rupture, and performs the same operation as that of the vent blocking mechanism 40 in the first embodiment. As a result, the pair of supporting movable bodies 42B rotate, and as shown in FIG. 15, the closing movable body 43B moves to the closing position, and closes the ventilation port 90.
[0084]
According to the light source device according to the second embodiment, the same effect as the light source device according to the first embodiment can be obtained.
[0085]
【The invention's effect】
As described above, according to the present invention, in a normal use state, the movable body and the detection unit can be disposed at a position where the outflow of air through the ventilation hole is not prevented, and therefore, the hindrance of cooling is prevented. can do. Further, when the lamp is ruptured, the movable body closes the ventilation hole in conjunction with the operation of the detecting unit receiving the pressure wave, so that the lamp fragments can be more completely sealed in the light source device.
[Brief description of the drawings]
FIG. 1 is a plan view showing a light source device according to Embodiment 1 of the present invention.
FIG. 2 is a side view showing the above light source device.
FIG. 3 is an exploded perspective view of a main part of the above light source device.
FIG. 4 is a perspective view showing a vent blocking mechanism.
FIG. 5 is a plan view showing a vent blocking mechanism.
FIG. 6 is a side view showing a vent blocking mechanism.
FIG. 7 is a front view showing a vent blocking mechanism.
FIG. 8 is a diagram showing a positional relationship of a vent blocking mechanism in a normal lighting state.
FIG. 9 is a diagram illustrating a state in which the detection plate is rotated by a ゜.
FIG. 10 is a diagram showing a state where the detection plate has rotated by b ゜.
FIG. 11 is a diagram showing a state in which a movable body closes an air vent.
FIG. 12 is a side view showing the entire light source device in a state where a movable body closes a vent.
FIG. 13 is an enlarged perspective view of a main part showing a modification.
FIG. 14 is a side view showing a light source device according to Embodiment 2 of the present invention.
FIG. 15 is a side view showing the light source device in a state where the vent is closed.
[Explanation of symbols]
10, 10B lamp unit, 12 lamps, 16 vents, 17 openings, 20, 20Ba exchange-side lamp housing, 24 vents, 26 openings, 40 vent blocking mechanism, 42 movable body, 42B supporting movable body, 43B closing Movable body, 50 detection plate, 60 transmission mechanism, 62 cam plate, 63 cam groove, 64 cam follower, 70 coil spring, 80 opening mechanism, 90, 91 vent.

Claims (7)

Lamp and
A vessel having a vent for cooling the lamp and an opening for transmitting pressure waves from the inside, and a vessel arranged to surround the lamp;
A movable body movable between an open position avoiding the vent and a closed position closing the vent, and a detecting unit provided at the opening and receiving a pressure wave passing through the opening; A vent blocking mechanism for moving the movable body toward the closed position in conjunction with the operation of the unit receiving the pressure wave,
Light source device provided with. The light source device according to claim 1,
The vent blocking mechanism,
A first shaft for rotatably supporting the movable body between the open position and the closed position, a second shaft for rotatably supporting the detection unit, and the detection unit A transmission mechanism that transmits the operation of receiving the pressure wave and rotating as the operation of rotating the movable body toward the closed position,
Light source device provided with. The light source device according to claim 1 or 2, wherein
The vent blocking mechanism,
A first urging unit that urges the movable body to the closed position side in a state where the movable body has moved to the closed position in response to the operation in which the detection unit receives the pressure wave. The light source device. The light source device according to claim 1, wherein:
The vent blocking mechanism,
The light source device further includes a second urging unit that urges the movable body toward the open position in a normal use state before the detection unit receives the pressure wave. The light source device according to claim 1 or 2, wherein
The vent blocking mechanism,
The detecting unit urges the movable body toward the closed position in a state where the movable body is moved to the closed position in conjunction with the operation of receiving the pressure wave, and the detecting unit receives the pressure wave. A light source device comprising: a biasing unit having a single coil spring for biasing the movable body toward the open position in a previous normal use state. The light source device according to claim 1, wherein:
The light source device, wherein the detection unit closes the opening in a normal use state before the detection unit receives the pressure wave. The light source device according to any one of claims 1 to 6, wherein
The light source device further includes an opening mechanism for moving the movable body to the opening position by an operation from outside the container.

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