JP5886983B2 - Discharge lamp and discharge lamp attaching / detaching tool - Google Patents

Description

  The present invention includes a discharge lamp provided with a fixing base at a base end portion of an arc tube, and the fixing base mounted by being inserted into a lamp holder having a predetermined reference surface and rotated, and the discharge lamp The present invention relates to a discharge lamp attaching / detaching tool for attaching / detaching a lamp to / from a lamp holder.

  2. Description of the Related Art Conventionally, a discharge lamp has been adopted as a light source in a light source device used for bonding optical parts, curing paints and adhesives, wafer peripheral exposure in semiconductor manufacturing, and the like. This type of discharge lamp is, for example, a discharge lamp that emits Xe gas for a xenon lamp, mercury for an ultra-high pressure mercury lamp, and mercury and a metal halide for a metal halide lamp. It discharges at a distance between electrodes and generates light with very high luminance.

  Patent Document 1 discloses an example of a light source device that uses a discharge lamp as described above. The light source device described in Patent Document 1 includes a discharge lamp in which electrodes of a discharge tube are provided integrally with the discharge tube. When replacing the lamp, when the discharge lamp is inserted into the lamp unit in the light source device, the cathode at the distal end on the insertion side of the discharge lamp is pressed by the connecting member provided in the lamp unit, and the cathode and the connecting member are electrically connected. At the same time, the discharge lamp is positioned in the lamp unit.

JP 2001-176304 A

  The light emitted from the discharge lamp is reflected by an elliptical mirror disposed in the lamp unit and emitted from the emission port. For this reason, the relative positional relationship between the elliptical mirror and the discharge lamp in the lamp unit is very important in obtaining a stable emitted light quantity. In a discharge lamp, the optical axis indicates the central axis that passes from the center of the base on the discharge lamp base side through the cathode tip and the center of the anode tip and passes through the center of the electrode on the discharge lamp tip side, and is linear in design. . The discharge lamp is manufactured such that each part of the lamp is placed on the design central axis within an allowable tolerance range, so that the first focal point of the elliptical mirror is coincident with the base point of the discharge lamp.

  For this reason, if the insertion direction and the mounting position of the discharge lamp are inadequate, the first focal point of the elliptical mirror and the bright spot of the discharge lamp in the lamp unit do not coincide with each other, and the brightness symmetry and uniformity of the irradiation object are not uniform. There is a problem that the sex is broken. Moreover, if the mounting position of the discharge lamp is inadequate, there is a possibility that the lamp cannot be lit due to poor connection between the electrode and the connecting member, or the lamp life may be shortened.

  Further, in the manufacturing process of the discharge lamp, a tip part is formed on the surface of the bulb in order to enclose and seal a discharge medium made of mercury or a rare gas in the lamp body. Since a recess is formed on the inner surface, heat accumulation occurs, and there is a concern that the life of the discharge lamp may be affected depending on the position of the chip. Therefore, there is a demand for controlling the mounting posture of the discharge lamp so that the tip portion faces downward.

  The present invention has been made in view of the above circumstances, and it is possible to reliably prevent erroneous mounting at the time of lamp replacement, and to be mounted in a proper posture at a predetermined position, and the discharge lamp. It is an object to provide a discharge lamp attaching / detaching tool that can be easily attached / detached.

According to one embodiment of the present invention, a lamp holder having an arc tube having a distal end portion and a proximal end portion, and a fixing base provided at the proximal end portion, the fixing base having a predetermined reference surface. A discharge lamp to be mounted by being inserted and rotated, wherein the fixing base has a common axial center with the arc tube, and a substantially cylindrical first body portion that houses the base end portion; A flange portion formed so as to protrude from the outer peripheral surface of the first body portion, and the flange portion has a length in a first direction orthogonal to the axis when viewed from the axis direction. And the outer peripheral shape which becomes shorter than the length of the 2nd direction orthogonal to the 1st direction, and a flange part is the base end formed on the plane prescribed | regulated by the 1st direction and the 2nd direction the end face of the section side, is formed in the first direction, when the fixing cap is inserted into the lamp holder, securing A short portion for restricting the cap orientation, is formed in the second direction, when the fixing cap is rotated, and a long portion which engages the lamp holder, the outer peripheral edge portion of the flange portion When viewed from the axial direction, it is formed in a non-symmetrical form with respect to a virtual straight line extending through the axial direction in the second direction, and when the fixing base is mounted on the lamp holder, the base end side A discharge lamp is provided in which the end face of the lamp contacts the reference plane.

  According to the above configuration, since the outer peripheral edge portion of the flange portion is formed in an asymmetrical shape, the insertion direction of the fixing base when the fixing base is inserted into the lamp holder is restricted by the flange portion, and the discharge is performed. Incorrect insertion of the lamp is prevented.

  Further, the short portion is composed of one outer peripheral edge portion and the other outer peripheral edge portion formed with the axis interposed therebetween, and one outer peripheral edge portion with respect to a virtual straight line along a second direction orthogonal to the axis. The first length of the longest virtual perpendicular among the virtual perpendiculars dropped from the second and the second length of the longest virtual perpendicular of the virtual perpendiculars drawn from the other outer peripheral edge are different, and the long portion has an axial center The third length of the longest virtual straight line among the virtual straight lines connecting the axial center and the outer peripheral edge of the one end and the other end. The length can be configured to be longer than both the first length and the second length.

  Further, the short portion is composed of one outer peripheral edge portion and the other outer peripheral edge portion formed with the axis interposed therebetween, and one outer peripheral edge portion with respect to a virtual straight line along a second direction orthogonal to the axis. The first length of the longest virtual perpendicular among the virtual perpendiculars dropped from the second and the second length of the longest virtual perpendicular of the virtual perpendiculars drawn from the other outer peripheral edge are different, and the long portion has an axial center Of the perpendicular line extending from the outer peripheral edge of the one end to the virtual straight line along the first direction perpendicular to the axial center. The sum of the third length of the long vertical line and the fourth length of the longest vertical line from the outer peripheral edge of the other end is longer than the sum of the first length and the second length. It can be constituted as follows.

  Each of the one outer peripheral edge portion and the other outer peripheral edge portion includes a straight line portion parallel to the second direction, and each of the outer peripheral edge portion at one end and the outer peripheral edge portion at the other end in the second direction. It can comprise so that an opposing circular arc part may be included.

  The flange portion is preferably plate-shaped.

  The lamp holder may include a protrusion that restricts rotation of the fixing base, and the short portion may include a receiving portion that engages with the protrusion when the fixing base is rotated.

  According to the above configuration, when the fixing base is rotated, the fixing base can be regulated so as not to rotate more than a predetermined angle by the protrusion, so that the fixing base is correctly positioned on the lamp holder. be able to.

Further, the lamp holder is in contact with the end face on the distal end side of the flange portion when the fixing base is mounted on the lamp holder, and the first biasing biases the fixing base toward the proximal end side. It is good also as a structure provided with a means and the end surface by the side of a base end part contact | abutting to a reference surface with the urging | biasing force of a 1st urging | biasing means . According to such a configuration, the end face on the base end side of the flange portion can be more reliably positioned on the reference plane by using the biasing force of the biasing means.

  Further, the end surface of the flange portion on the tip end side side can be configured to include a countersunk portion into which the first urging means is fitted. According to such a configuration, when the fixing base is attached to the lamp holder, a click feeling is obtained when the urging means is fitted into the dished portion, so that the fixing base is correctly attached to the lamp holder. Can be confirmed.

  In addition, the lamp holder includes a fixing means that protrudes and contacts the outer peripheral surface of the first body when the fixing base is mounted on the lamp holder, and fixes the fixing base. The first region includes a first region where the fixing means can abut on the outer peripheral surface, and a second region where the fixing unit cannot contact, and the second region when the fixing base is not rotated. The first region may be opposed to the fixing unit when the fixing unit is opposed to the fixing unit and the fixing base is rotated.

  According to such a configuration, after the fixing base is inserted into the lamp holder, the fixing base cannot be fixed by the fixing means unless the fixing base is rotated. Therefore, the fixing base is correctly positioned on the lamp holder. The user can be prompted to do so.

  Further, the second region can be configured to have a flat surface portion in which the outer peripheral surface of the first body portion is cut out by a plane parallel to the axial center. In this case, it is desirable that the second region has a groove portion that is continuous with the flat portion and formed from the flat portion to the first region.

  The arc tube includes a tip portion for enclosing and sealing the discharge medium. When the fixing base is attached to the lamp holder, the tip portion is below the horizontal plane including the axis, It is desirable to be placed other than directly under the heart. In this case, the tip portion may be arranged such that a virtual straight line connecting the axis and the tip portion intersects with a horizontal plane including the axis at an angle of about 45 ° when viewed from the axial direction. desirable.

  According to such a configuration, when the discharge lamp emits light, a depression formed at a position corresponding to the tip portion on the inner surface of the bulb forms a heat reservoir, thereby preventing a high temperature of the bulb, which is a problem. .

  In addition, the first body portion may be configured to include a plurality of opening holes that are disposed at symmetrical positions around the axis and that open to the end surface of the first body portion on the proximal end side.

  The flange portion is provided at an end portion of the first body portion on the base end portion side, and the fixing base has an axis common to the first body portion, and is on the base end portion side of the flange portion. It can comprise so that it may have the 2nd trunk | drum which protrudes cylindrically from an end surface. In this case, the second body portion may include a protrusion that protrudes vertically from the outer peripheral surface.

  According to another embodiment of the present invention, there is provided a discharge lamp attaching / detaching tool which is attached to the discharge lamp and attaches / detaches the discharge lamp to / from the lamp holder, which houses the second body portion, and has a protruding portion. There is provided a discharge lamp attaching / detaching tool including a substantially cylindrical fitting portion that fits with a gripping portion that is formed integrally with the fitting portion and is gripped by a user.

  According to such a configuration, even when the fixing base is in a very hot state, such as immediately after the discharge lamp is turned off, the lamp can be replaced using the discharge lamp attaching / detaching tool. The accompanying downtime can be shortened.

  The fitting portion has an inner diameter larger than the outer diameter of the second body portion and an outer diameter smaller than the outer peripheral edge portion of the flange portion, and extends from the inner peripheral surface of the fitting portion to the outer peripheral surface. A first fitting groove that includes a first groove that passes through and extends in parallel along the axis of the fitting portion, and a second groove that extends from the first groove and extends in the circumferential direction of the fitting portion. And the projecting portion is fitted in the first groove and the second groove in this order so that the fitting portion is integrally fixed to the fixing base.

  According to such a configuration, when the fixing base is attached to the lamp holder, the protrusion of the fixing base and the second groove of the discharge lamp attaching / detaching tool are fitted and fixed using the discharge lamp attaching / detaching tool. When rotating the base, there is no possibility that the fixing base is detached from the discharge lamp attaching / detaching tool.

  In addition, the fitting portion includes a second fitting groove formed symmetrically with the first fitting groove at a position facing the first fitting groove. According to such a configuration, one discharge lamp attaching / detaching tool can be used for both the work for mounting the discharge lamp on the lamp holder and the work for removing the discharge lamp from the lamp holder. Further, the grip portion may include an index indicating a position corresponding to the first fitting groove and a position corresponding to the second fitting groove.

  The fitting portion may include a second urging unit that urges the second body portion toward the distal end portion when the fitting portion is integrally fixed to the fixing base. According to such a configuration, the discharge lamp attaching / detaching tool and the fixing base can be more reliably fitted.

  Further, in the case where the fixing base of the discharge lamp has a plurality of opening holes on the end face on the base end portion side of the first body portion, the discharge lamp attaching / detaching tool has an outer diameter smaller than the outer peripheral edge portion of the flange portion. A fitting portion having a substantially cylindrical shape and having a plurality of protrusions fitted to the plurality of opening holes, and a gripping portion formed integrally with the fitting portion and gripped by the user. Can be configured.

  As described above, according to the configuration of the embodiment of the present invention, a discharge lamp that can be mounted in a proper posture at a predetermined position while reliably preventing erroneous mounting during lamp replacement, and the discharge lamp A discharge lamp attaching / detaching tool that can be easily attached / detached is realized.

FIG. 1 is a schematic external view of a light source device according to an embodiment of the present invention. 2A is a schematic external view of a part of the lamp unit according to the embodiment of the present invention, and FIG. 2B is a top view of the lamp unit and the lamp holder according to the embodiment of the present invention. It is. FIG. 3 is a schematic external view of a part of a lamp unit according to an embodiment of the present invention. 4A and 4B are schematic perspective views of a discharge lamp according to an embodiment of the present invention. 5A to 5C are schematic external views of a discharge lamp base according to an embodiment of the present invention. 6A and 6B are top views of a lamp unit, a lamp holder, and a discharge lamp according to an embodiment of the present invention. FIG. 7 is a partial cross-sectional view of a cap and clamp of a discharge lamp according to an embodiment of the present invention. FIGS. 8A and 8B are various projection views of the lamp replacement jig according to the embodiment of the present invention. FIG. 9 is a schematic perspective view of a lamp replacement jig and a discharge lamp according to an embodiment of the present invention. 10A to 10E are schematic external views of a part of a lamp unit and a discharge lamp according to an embodiment of the present invention. FIGS. 11A to 11F are schematic external views of a part of a lamp unit and a discharge lamp according to an embodiment of the present invention. FIG. 12 is a view showing a modification of the lamp replacement jig and the discharge lamp according to one embodiment of the present invention. FIG. 13 is a view showing a modification of the flange of the base attached to the discharge lamp according to the embodiment of the present invention. FIG. 14 is a view showing a modification of the flange of the base attached to the discharge lamp according to the embodiment of the present invention. FIG. 15 is a view showing a modification of the flange of the base attached to the discharge lamp according to the embodiment of the present invention. FIG. 16 is a view showing a modification of the discharge lamp according to one embodiment of the present invention. FIG. 17 is a view showing a modification of the discharge lamp according to one embodiment of the present invention.

  Hereinafter, a discharge lamp according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic external view of a light source device 1 according to an embodiment of the present invention. The light source device 1 is a device that supplies ultraviolet light in UV curing or the like in which a photosensitive resin is cured from a monomer to a polymer by photocuring. FIG. 1 is a perspective view of the light source device 1 when viewed from the rear surface 10a side of the housing 10. An exit port through which light from the lamp unit 100 is emitted is provided on the front surface (not shown in FIG. 1) facing the back surface 10a. An optical fiber bundle (not shown) is connected to the emission port, and light from the lamp unit 100 is guided to a predetermined workpiece by the optical fiber bundle. The housing 10 of the light source device 1 houses a lamp unit 100, a power supply device (not shown) that supplies power to the lamp unit 100, a light control device that adjusts the light amount of the lamp unit 100, and the like (not shown). Yes. A lamp replacement door 200 is provided on the side surface of the housing 10. One end (front side) of the lamp replacement door 200 is pivotally supported by the housing 10, and the other end (back 10 a side) is pulled out of the housing 10. The side surface of the housing 10 is opened. The lamp unit 100 is a substantially rectangular parallelepiped unit (component) that includes a discharge lamp 500 (described later) and emits light from the discharge lamp 500, and a side plate of the lamp unit 100 via a locking fitting. It is screwed to the inner surface.

  Therefore, when the lamp replacement door 200 is opened, the lamp unit 100 and the lamp replacement door 200 rotate integrally around the one end side of the lamp replacement door 200, and the lamp unit 100 is attached to the housing 10. Exposed outside. As described above, in this embodiment, the lamp unit 100 can be exposed from the housing 10 simply by opening the lamp replacement door 200, so that access to each part of the lamp unit 100 is facilitated. The replacement work of the discharge lamp 500 can be performed more quickly.

  The rear panel 101 of the lamp unit 100 is a rectangular plate-shaped member made of metal, and a lamp holder 300 is attached to the rear panel 101. As will be described later, when the discharge lamp 500 is mounted on the lamp unit 100, the discharge lamp 500 is inserted into the lamp unit 100 from the lamp holder 300 (FIG. 6). A front panel (not shown in FIG. 1) is provided at a position facing the rear panel 101 in the case of the lamp unit 100 (lamp case), and the front panel side is the emission port side of the lamp unit 100. Details of the configuration and functions of the lamp unit 100 will be described later.

  Here, as shown in FIG. 1, in a state where the lamp replacement door 200 is opened and the lamp unit 100 is exposed, the ridge line directions of the lamp unit 100 are defined as an X axis, a Y axis, and a Z axis. That is, in this embodiment, the plane parallel to the back panel 101 is the XY plane, and the X axis and the Y axis are defined in the horizontal direction and the vertical direction of the back panel 101, respectively. Further, a Z-axis is defined that is orthogonal to the XY plane and has a positive direction from the rear panel 101 of the lamp unit 100 toward the front panel. Hereinafter, when referring to other figures, the X axis, the Y axis, and the Z axis will be described as defined above.

  FIG. 2 is a diagram illustrating the structure of the lamp unit 100 provided in the light source device 1 according to an embodiment of the present invention. FIG. 2A is a front view of the lamp unit 100 when viewed from the rear panel 101 side. FIG. 2B is a top view illustrating the internal configuration of the lamp unit 100 and the configuration of the lamp holder 300, and the top panel of the lamp unit 100 is omitted for convenience of description. The rear panel 101 is fixed to the rear surface of the lamp unit 100 by a panel fixing screw 102. FIG. 3 is a diagram illustrating a state in which the lever 301 at the position illustrated in FIG. 2A is rotated around the lever shaft 302 and the direction of the lever 301 is reversed.

  FIG. 4 is a perspective view illustrating the configuration of the discharge lamp 500 accommodated in the lamp unit 100 of the light source device 1 according to an embodiment of the present invention. FIG. 4A is an exploded perspective view of the discharge lamp 500, and FIG. 4B is a perspective view of the discharge lamp 500 after assembly. In this specification, the central axis of the discharge lamp 500 (the axis orthogonal to the XY plane and parallel to the Z axis) is BZ.

  The lamp body 520 is a commercially available lamp provided with an arc tube formed using quartz glass or the like excellent in ultraviolet light transparency and heat resistance. At both ends of the lamp main body 520, a base end cap 525 from which the screw portion 523 protrudes and a front end cap 526 from which the screw portion 527 protrudes are provided. In addition, an elliptical bulb 521 having an inner diameter in the XY plane that is larger than other portions of the lamp body 520 is formed in a part of the lamp body 520. In the manufacturing process of the lamp body 520, a chip portion 522 is formed on the surface of the bulb 521 in order to enclose and seal a discharge medium made of mercury, rare gas, or the like from the bulb 521 into the lamp body 520. The lamp body 520 is attached with a base 530 on the anode side on the tip side (Z-axis positive side with respect to the lamp body 520) and on the cathode side on the base end side (Z-axis negative side with respect to the lamp body 520). (Fixing cap) 510 is attached.

  FIG. 5 is a schematic external view of the base 510 on the cathode side of the discharge lamp 500 according to the present embodiment. 5A is a front view of the base 510, FIG. 5B is a right side view of the base 510, and FIG. 5C is a rear view of the base 510. The base 510 is a substantially cylindrical member made of a metal such as brass. A flange 513 protrudes from the outer peripheral surface of the base 510, and the first body 515 is located on the front end side (Z-axis positive side) and the second body 511 is located on the base end side (Z-axis negative side) across the flange 513. Is formed.

  The first body 515 is a portion that is inserted into the lamp unit 100 from an opening 311 (FIG. 2) of the lamp holder 300 described later. The first body 515 has a cylindrical shape, and the outer peripheral surface of the front end of the first body 515 is chamfered in a tapered shape. Further, on the right side surface and the left side surface (not shown in FIG. 5) of the first body portion 515, a part of the outer peripheral surface (first region) is formed by two YZ planes having the same distance from the central axis BZ. A pair of cut surfaces 516 (second regions) that are D-cut are provided. In another embodiment, the cut surface 516 may be formed only on the right side surface of the first body 515.

  The second body 511 is formed in a cylindrical shape with the same outer diameter as the first body 515. On the outer peripheral surface of the second body portion 511, an engagement pin 512 that protrudes vertically upward (in the positive direction of the Y axis) is provided. As will be described later, the engagement pin 512 functions as an engagement portion with the engagement grooves 602 and 603 of the lamp replacement jig (discharge lamp attaching / detaching tool) 600 (FIG. 9).

  The flange 513 protrudes in a disk shape from the outer peripheral surface of the base 510, and fixes and positions the discharge lamp 500 with respect to the lamp holder 300 when attached to the lamp holder 300. As shown in FIGS. 5A to 5C, the flange 513 has an upper end portion (Y-axis positive side with respect to the central axis BZ) and a lower end portion (Y-axis negative side with respect to the central axis BZ). It has a D-cut shape (short portion) in a plane parallel to the plane. Further, the outer peripheral shape (long portion) of the arc portion in the XY plane of the flange 513 coincides with a circular arc centered on the central axis BZ. Further, a receiving portion 514 is formed at one corner of the flange 513. The receiving portion 514 is formed to engage with the parallel pin 308 (FIG. 2A) when the discharge lamp 500 is mounted on the lamp holder 300 as will be described later.

  In addition, the flange 513 is formed in an astigmatism shape about the central axis BZ in the XY plane. Specifically, in the XY plane, the upper end of the flange 513 is configured to coincide with the outer circumferences of the first body 515 and the second body 511, and the lower end of the flange 513 is the first body 515 and the second body. It is configured to be separated from the outer periphery of 511 by a distance d. That is, as shown in FIG. 5B, the flange 513 has a vertical line length (first length) extending from the central axis BZ to the upper end surface 513a of the flange 513 as La, and from the central axis BZ to the flange 513. When the length of the perpendicular line (second length) lowered to the lower end surface 513b is Lb, Lb−La = d. Further, as will be described later, in the present embodiment, the flat surface portion 518 on the base end side (Z-axis negative side) of the flange 513 is configured to contact the reference surface R (FIG. 7), and the discharge lamp 500 is configured. When mounted on the lamp holder 300, the position of the arc bright spot of the discharge lamp 500 coincides with the position of the first focal point of an elliptical mirror 103 (described later) in the lamp unit 100. 5C, the flange 513 is accommodated in a left flange engagement portion 309 and a right flange engagement portion 310, which will be described later, on the flat surface portion 519 on the distal end side (Z-axis positive side) of the flange 513. The dish pad 517 into which the plunger 315 (FIG. 7) fits is formed.

  Further, as shown in FIGS. 4A, 4B, 5A, 5B, and 5C, the lamp is inserted into the base 510 so that the base end portion of the lamp body 520 is inserted. A hole 533, an engagement hole 528 that engages with the base end cap 525 of the lamp body 520, a screw portion insertion hole 536 through which the screw portion 523 of the base end cap 525 is inserted, and a nut 524 a that is screwed with the screw portion 523. A nut insertion hole 534 into which the etc. are inserted is formed to communicate with the central axis BZ. The inner diameter of the screw portion insertion hole 536 is smaller than the inner diameter of the engagement hole 528 (that is, stepped), and the opening portion on the tip side (engagement hole 528 side) of the screw portion insertion hole 536. Around the periphery, a lamp contact surface 529 with which the base end cap 525 of the discharge lamp 500 contacts is formed. Further, the inner diameter of the screw portion insertion hole 536 is smaller than the inner diameter of the nut insertion hole 534 (that is, has a step), and is configured to be slightly larger than the outer diameter of the screw portion 523. A fixing surface 532 to which the nut 524a and the like are fixed is formed around the opening on the proximal end side (nut insertion hole 534 side) of the screw portion insertion hole 536.

  Next, a method for assembling the discharge lamp 500 will be described. First, the joining of the cathode-side base 510 configured as described above and the lamp body 520 will be described. When the base end base 525 of the lamp body 520 is inserted into the first body 515 (that is, the lamp insertion hole 533), the base end base 525 is stopped by the lamp contact surface 529, and the screw part 523 is in the screw part insertion hole 536. It is inserted and exposed to the nut insertion hole 534 side (that is, the nut contact surface 532 side). In this state, when the discharge lamp 500 is turned on, the bright spot generated in the vicinity of the cathode (not shown) of the discharge lamp 500 and the first focus of the elliptical mirror 103 (FIG. 6) coincide with each other. The relative positional relationship between 510 and the lamp body 520 is adjusted. Specifically, the position in the XY plane is adjusted using play between the screw portion 523 and the screw portion insertion hole 536, and an adjustment (not shown) is made between the base end cap 525 and the lamp contact surface 529. A member (for example, a washer, shim, etc.) is inserted to adjust the position in the Z-axis direction. Further, when the discharge lamp 500 is attached to the lamp unit 100, the lamp body 520 is rotated about the central axis BZ so that the tip portion 522 of the discharge lamp 500 is located at a position lower than the height of the central axis BZ. Adjust the position in the rotation direction. Then, after adjusting the relative positional relationship between the base 510 and the lamp body 520, a flat washer 524c, a spring washer 524b, and a nut 524a are sequentially attached to the screw portion 523, and the nut 524a is tightened and fixed. An adhesive is poured between the base end portion and the base 510 (that is, in the lamp insertion hole 533) to fix them together. Thus, the joining of the cathode side cap 510 and the lamp body 520 is completed.

  Next, the joining of the anode side base 530 and the lamp body 520 will be described. As shown in FIGS. 4A and 4B, the base 530 on the anode side is a bottomed cylindrical member made of a metal such as brass. As will be described later, when the discharge lamp 500 is mounted on the lamp unit 100, the base 530 is electrically connected to the anode connecting portion 104 of the lamp unit 100 (FIG. 6). In addition, an insertion hole 531 for inserting the tip cap 526 of the lamp body 520 is formed inside the cap 530. The distal end side of the insertion hole 531 has a reduced diameter, and a screw hole (not shown) that engages with a screw portion 527 provided on the distal end cap 526 of the lamp body 520 is formed. When the anode-side base 530 and the lamp body 520 are joined, the tip base 526 of the lamp body 520 is inserted into the insertion hole 531 of the base 530, and the screw portion 527 is screwed into the screw hole in the insertion hole 531. Thus, the joining of the anode side base 530 and the lamp body 520 is completed.

  In this way, the cathode-side base 510, the lamp body 520, and the anode-side base 530 are integrally joined along the central axis BZ, whereby the discharge lamp 500 as shown in FIG. 4B is completed. To do.

  Next, the configuration of the lamp holder 300 will be described with reference to FIGS. 2 (a) and 2 (b) again. A lamp holder 300 that supports the discharge lamp 500 is attached to the rear panel 101 of the lamp unit 100. The lamp holder 300 includes a lever 301, a lever shaft 302, a lever bearing 303, and a holder base 305. Each component of the lamp holder 300 is made of a metal such as brass or stainless steel. A clamp 306 is formed on the front surface (Z-axis negative side) of the holder base 305.

  The clamp 306 is a member having a function as an insertion opening of the discharge lamp 500 and a function of fixing the base 510 of the discharge lamp 500 and positioning the discharge lamp 500 on the reference plane R. Details of insertion and positioning of the discharge lamp 500 will be described later. As shown in FIGS. 2A and 2B, the clamp 306 has a circular opening 311 through which the discharge lamp 500 is inserted. Here, an axis AZ that passes through the center of the opening 311 of the clamp 306 and is orthogonal to the XY plane and parallel to the Z axis is defined. In the present embodiment, the inner diameter of the opening 311 is substantially equal to the maximum outer diameter of the first body 515 of the base 510.

  As shown in FIG. 2A, a left flange engaging portion 309 and a right flange engaging portion 310 for receiving a flange 513 provided on the base 510 of the discharge lamp 500 are formed on the left and right ends of the clamp 306. Yes. As shown in FIG. 2B, the left flange engaging portion 309 and the right flange engaging portion 310 protrude from the front surface 306a of the clamp 306 to the Z axis negative side so that the cross section in the XZ plane is substantially L-shaped. The flange 513 is accommodated in a gap formed between the front surface 306a and the left flange engaging portion 309 and the right flange engaging portion 310 (details will be described later). In the present embodiment, the discharge lamp 500 is inserted into the opening 311 of the clamp 306, the flange 513 of the cathode-side base 510 is brought into contact with the front surface 306a of the clamp 306, and then the base 510 is rotated clockwise on the XY plane. When rotated, the flange 513 slides on the front surface 306 a and is accommodated in the left flange engaging portion 309 and the right flange engaging portion 310. In addition, the inside (namely, axis AZ side) of the left flange engaging portion 309 and the right flange engaging portion 310 is cut on a straight line in a plane parallel to the YZ plane, and flat portions 309a and 310a are formed. Yes.

  Here, the length of the perpendicular drawn from the axis AZ to the flat portion 309a of the left flange engaging portion 309 is L1, and the length of the perpendicular drawn from the axis AZ to the flat portion 310a of the right flange engaging portion 310 is Lr. Then, Ll <Lr is configured. Specifically, in the present embodiment, Ll is set to be substantially the same as the length La of the flange 513, or longer than La and shorter than La + d (FIG. 5). Lr is set to be substantially the same as the length Lb of the flange 513 or slightly longer than Lb. Therefore, when the discharge lamp 500 is attached to the lamp holder 300, the flange 513 is inserted between the flat portions 309a and 310a so that the upper end surface 513a and the lower end surface 513b of the flange 513 are opposed to the flat portions 309a and 310a. Comes into contact with the front surface 306a of the clamp 306 (details will be described later). In addition, Ll and Lr should just be comprised so that either one may become longer than the other (namely, asymmetrical), and as another embodiment, you may be comprised so that it may become Ll> Lr. .

  Further, as shown in FIG. 2A, a parallel pin 308 that is a rod-like member that protrudes from the front surface of the clamp 306 toward the negative direction of the Z-axis is provided on the upper left side of the left flange engaging portion 309. . The clamp 306 is fixed to the holder base 305 by a clamp fixing screw (not shown). The holder base 305 is a disk-like member having an opening (not shown) similar to the opening 311 of the clamp 306 and the opening (not shown) of the back panel 101 so that the discharge lamp 500 can be inserted. . The holder base 305 is fixed to the back panel 101 by a holder base fixing screw 307.

  A lever bearing 303 is fixed to the upper surface of the clamp 306 by a lever bearing fixing screw 304. The lever bearing 303 is a member in which a screw hole 314 that is screwed into a screw groove (not shown) at the lower end of the lever shaft 302 is formed. The clamp 306 is provided with a through hole 313 that penetrates to the opening 311 at a position facing the opening of the screw hole 314 of the lever bearing 303.

  The lever 301 is a member operated to fix the base 510 of the discharge lamp 500 inserted into the opening 311 to the lamp holder 300 or to release the fixation. One end of the lever 301 is joined to the upper end portion of the lever shaft 302, and a helical screw groove that is screwed into the screw hole 314 of the lever bearing 303 is formed on the outer periphery of the lower end portion of the lever shaft 302. .

  As shown in FIGS. 2A and 3, when the lever 301 at the position shown in FIG. 2A is rotated around the lever shaft 302 to reverse the direction of the lever 301, The lower end portion advances in the screw hole 314 of the lever bearing 303 and the through hole 313 of the clamp 306 in accordance with the rotation of the lever 301, and the pressing portion that is the tip of the lever shaft 302 from above the opening 311 of the clamp 306. 312 protrudes. When the pressing portion 312 protrudes from the opening 311, the base 510 of the discharge lamp 500 is fixed to the lamp holder 300.

  FIG. 6 is a diagram for explaining a state in which the discharge lamp 500 according to the present embodiment is attached to the lamp holder 300, and a partial configuration of the lamp unit 100 according to the present embodiment, the upper surface showing the lamp holder 300 and the discharge lamp 500 FIG. 6A shows a state immediately before the discharge lamp 500 is inserted into the lamp holder 300, and FIG. 6B shows a state after the discharge lamp 500 is attached to the lamp holder 300. As shown in FIGS. 6A and 6B, the lamp unit 100 includes an elliptical mirror 103 and an anode connecting portion 104. The elliptical mirror 103 is a reflecting member that reflects the emitted light of the discharge lamp 500 attached and fixed to the lamp unit 100 by the lamp holder 300 to the emission port (not shown) of the light source device 1. When the discharge lamp 500 is mounted on the lamp unit 100, the anode connecting portion 104 is configured to abut against the anode side cap 530 and be electrically connected. The anode connecting portion 104 has a biasing means (not shown) such as a spring, and biases the tip of the discharge lamp 500 toward the lamp holder 300 with an appropriate pressing force. As the biasing means, it is preferable to use a torsion spring, a coil spring, a spiral spring, a bamboo spring, a disc spring, or a ring spring.

  As shown in FIG. 6A, when mounting the discharge lamp 500 to the lamp unit 100, first, the base 510 of the discharge lamp 500 is rotated in the XY plane, and the flange 513 is the left flange engaging portion of the lamp holder 300. The direction is adjusted so as to pass between 309 and the right flange engaging portion 310 (that is, so as to be pinched). As shown in FIG. 2A and FIG. 5B, in this embodiment, the length Lb (= La + d) of the perpendicular line dropped from the central axis BZ of the base 510 of the discharge lamp 500 to the lower end surface 513b of the flange 513. Is longer than the length Ll (<La + d) of the perpendicular line dropped from the central axis AZ of the lamp holder 300 to the flat portion 309a of the left flange engaging portion 309. For this reason, the upper end surface 513a of the flange 513 is opposed to the flat portion 310a of the right flange engaging portion 310, and the lower end surface 513b of the flange 513 is opposed to the flat portion 309a of the left flange engaging portion 309 (that is, Even when the discharge lamp 500 is inserted into the opening 311 (with the direction of the base 510 rotated by 180 ° from the state shown in FIG. 6A), the flat portion 519 on the back side (tip side) of the flange 513 is left. Since it contacts the front surface 309 b of the flange engaging portion 309, the discharge lamp 500 cannot be inserted further into the lamp unit 100. Thus, in the present embodiment, the outer peripheral edge of the flange 513 has an upper end surface 513a and a lower end surface 513b (straight line portion) formed so as to extend in a direction orthogonal to the central axis BZ, and the first body portion 515. And a circular arc portion of a circle that is concentric with the center axis BZ (ie, centered on the center axis BZ) so as to be asymmetric with respect to the center axis BZ, thereby forming a base 510 when the discharge lamp 500 is inserted into the lamp unit 100. The insertion direction (that is, the direction of the discharge lamp 500) is regulated.

  As described above, when the cathode-side base 510 is inserted into the opening 311 of the clamp 306, the front surface 306 a of the clamp, the flat portion 309 a of the left flange engaging portion 309, and the flat portion 310 a of the right flange engaging portion 310. And form a flange receiving portion for receiving the flange 513. When the orientation of the cathode-side base 510 is adjusted and the anode-side base 530 is inserted into the opening 311 of the clamp 306 first, the flange 513 is connected to the left flange engaging portion 309 and the right flange engaging portion 310. And the flange 513 contacts the front surface 306a of the clamp 306. Next, the base 510 is rotated clockwise in the XY plane, and the flange 513 is engaged with the left flange engagement portion 309 and the right flange engagement portion 310 (that is, the front surface 306a, the left flange engagement portion 309, and the right flange engagement). In a gap formed with the portion 310. If the base 510 continues to rotate clockwise, the receiving portion 514 of the flange 513 hits the parallel pin 308 of the clamp 306, and the base 510 cannot be rotated further clockwise. Thus, in the present embodiment, the rotation of the discharge lamp 500 accompanying the rotation of the base 510 is restricted by the receiving portion 514 of the flange 513. When the rotation of the discharge lamp 500 is restricted, the tip portion 522 of the discharge lamp 500 is at a position lower than the height of the central axis BZ (that is, below the horizontal plane including the central axis BZ), and the central axis It is configured to be located other than directly below BZ.

  FIG. 7 is a partial cross-sectional view of the base 510 and the clamp 306 in a state where the discharge lamp 500 is attached to the lamp holder 300. In FIG. 7, the lamp body 520, the nut 524, and the like in the base 510 are not shown for the sake of clarity. As shown in FIG. 7, the clamp 306 is provided with a plunger 315 on the surface facing the back surface 309 c of the left flange engaging portion 309. And when the receiving part 514 of the flange 513 contact | abuts to the parallel pin 308 of the clamp 306, the plunger 315 is comprised so that it may fit in the saucer 517 of the flange 513. FIG. Therefore, the flange 513 is fixed so as not to be displaced in the left flange engaging portion 309, and the flange 513 is urged toward the back surface 309c of the left flange engaging portion 309. As described above, the discharge lamp 500 is urged in the Z-axis negative direction by the urging means of the anode connecting portion 104. In the present embodiment, in addition to the urging force of the urging means, the plunger 315 is urged. By the force, the flange 513 is positioned in contact with the back surface 309c of the left flange engaging portion 309, which is the reference surface R, with certainty.

  When the flange 513 is positioned on the reference plane R using only the urging means of the anode connecting portion 104, the urging force by the urging means is transmitted to the base 510 via the lamp body 520. For this reason, if the urging force is increased too much, the lamp body 520 may be damaged due to the urging force when the lamp body 520 is in a high temperature and high pressure state. Therefore, in this embodiment, the function of positioning the flange 513 on the reference plane R is also shared by the plunger 315 so that the urging force by the anode connecting portion 104 does not become unnecessarily high.

  Further, when the flange 513 is urged by the plunger 315, a click feeling is obtained when the plunger 315 is fitted into the dish pad 517. Therefore, when the discharge lamp 500 is rotated, the flange 513 is moved to the left flange engaging portion 309. The user can easily recognize that the positioning has been reliably performed. Although illustration and detailed description are omitted, the right flange engaging portion 310 has the same configuration as the left flange engaging portion 309.

  After the discharge lamp 500 is attached to the lamp holder 300 in this way, the lever 301 is rotated about the lever shaft 302 to reverse the direction of the lever 301 as shown in FIG. As described above, when the direction of the lever 301 is reversed, the pressing portion 312 protrudes from the upper side of the opening 311 of the clamp 306 in accordance with the rotation of the lever 301, so that the first body portion 515 of the base 510 is opened. 311 is pressed and fixed.

  Next, the cut surface 516 formed in the 1st trunk | drum 515 is demonstrated. The depth in the X-axis direction of the cut surface 516 shown in FIGS. 5B and 5C is longer than the length in the Y-axis direction when the pressing portion 312 shown in FIG. 3 protrudes into the opening 311. Is formed. Therefore, for example, even if the orientation of the discharge lamp 500 is adjusted as shown in FIG. 6A and the lever 301 is rotated while the discharge lamp 500 is only inserted into the lamp unit 100, the pressing portion 312. Does not come into contact with the first body portion 515, and the base 510 cannot be fixed to the clamp 306 by the pressing portion 312. That is, in the present embodiment, by forming the cut surface 516, erroneous mounting such as rotating the lever 301 and fixing the discharge lamp 500 in a state where the discharge lamp 500 is not correctly positioned on the lamp holder 300 is performed. It is preventing.

  Further, as described above, when the discharge lamp 500 is attached to the lamp holder 300, the tip portion 522 of the bulb 521 is located below the horizontal plane including the central axis BZ and other than directly below the central axis BZ. It is configured. The tip portion 522 is provided to enclose and seal a discharge medium made of mercury, a rare gas, or the like in the discharge lamp 500, but there is a problem that a recess is formed on the inner surface of the bulb 521. . If a recess is formed on the inner surface of the valve 521, there arises a problem that heat accumulates or mercury accumulates depending on the position. Specifically, since the discharge lamp 500 according to the present embodiment is mounted in the lamp unit 100 in a horizontal posture (that is, on the XZ plane), the position of the tip portion 522 in the Y-axis direction is more than the central axis BZ. When the height is high (that is, above the horizontal plane including the central axis BZ), there is a concern that the tip portion 522 accumulates heat, concentrates heat, and shortens the life of the discharge lamp. Further, when the discharge lamp 500 is mounted in the lamp unit 100, if the tip portion 522 is located directly below (that is, the Y axis direction negative side), mercury accumulates in the tip portion 522, so that the mercury evaporates. There is a concern that the time required for gasification becomes longer, and the time required for the discharge lamp 500 to light stably (that is, the time required for the amount of light to become constant) becomes longer. Therefore, in the present embodiment, when the discharge lamp 500 is mounted in the lamp unit 100, the tip portion 522 is positioned below the horizontal plane including the central axis BZ and other than directly below the central axis BZ. This problem has been solved by configuring this. In addition, when the tip portion 522 is viewed from the direction of the central axis BZ, an imaginary straight line connecting the central axis BZ and the tip portion 522 intersects a horizontal plane including the central axis BZ at an angle of approximately 45 °. It is desirable to be disposed obliquely below the central axis BZ.

  As described above, in the present embodiment, the flange 513 of the discharge lamp 500 is made asymmetrical with respect to a point, thereby restricting the insertion direction of the discharge lamp 500 into the lamp unit 100 and preventing the discharge lamp 500 from being mounted incorrectly. ing. Further, the discharge lamp 500 can be attached to the lamp unit 100 in an appropriate posture by restricting the rotational position of the base 510 by the receiving portion 514 of the flange 513 and the cut surface 516 of the base 510. Yes.

  When replacing the discharge lamp 500, an operation of removing the base 510 from the lamp holder 300 is performed to pull out the discharge lamp 500 from the lamp unit 100, and then the discharge lamp 500 is mounted on the lamp unit 100 as described above. However, when the lamp is replaced (that is, immediately after the lamp is turned off), not only the lamp body 520 but also the bases 510 and 530 are very hot. The discharge lamp 500 cannot be immediately removed from the lamp unit 100, and a downtime (non-operation time) occurs. Therefore, in this embodiment, in order to shorten this down time, the discharge lamp 500 is attached and detached using the lamp replacement jig 600.

  FIG. 8 is a schematic external view of a lamp replacement jig 600 (lamp attachment / detachment tool) in the present embodiment. FIG. 8B is a view when the arrangement of the lamp replacement jig 600 of FIG. 8A is rotated by 180 ° about the cylindrical axis. 8A and 8B respectively show a front view, a top view, and a rear view of the lamp replacement jig 600 in order from the left. FIG. 9 is a perspective view showing a state in which the lamp replacement jig 600 is attached to the discharge lamp 500 according to the present embodiment. The lamp replacement jig 600 is a hollow cylindrical member made of a metal such as brass or stainless steel. As shown in FIGS. 8A and 8B, the front end (back side) of the main body 601 of the lamp replacement jig 600 penetrates from the outer peripheral surface to the inner peripheral surface, and the engagement pin 512 of the base 510. Are substantially L-shaped engaging grooves 602 and 603. In the present embodiment, the engagement grooves 602 and 603 are formed in plane symmetry at positions facing each other at the tip of the main body 601. As will be described later, the engagement groove 602 is a groove that engages with the engagement pin 512 when the discharge lamp 500 is mounted on the lamp unit 100, and the engagement groove 603 removes the discharge lamp 500 from the lamp unit 100. It is a groove to be engaged with the engaging pin 512 at the time. The inner peripheral surface of the lamp replacement jig 600 is reduced in diameter on the base end side of the lamp replacement jig 600, and an annular index portion 604 is formed on the base end face of the lamp replacement jig 600. Yes. In the present embodiment, when the lamp replacement jig 600 is viewed in the positive direction of the Z-axis (that is, when viewed from the front), the indicator portion 604 is provided so that the positions of the engagement grooves 602 and 603 at the tip can be seen. An index “SET” is assigned to a position corresponding to the engagement groove 602, and an index “RELEASE” is assigned to a position corresponding to the engagement groove 603.

  When the engaging pin 512 of the base 510 is inserted into the tip opening 602a of the engaging groove 602 and the lamp replacement jig 600 is rotated clockwise in the XY plane, the engaging pin 512 is moved along the engaging groove 602. When the engagement pin 512 is advanced to the end portion 602b, the base 510 and the lamp replacement jig 600 are completely fixed in the rotation direction (clockwise direction) and the Z direction. On the other hand, when the engaging pin 512 of the base 510 is inserted into the tip opening 603a of the engaging groove 603 and the lamp replacement jig 600 is rotated counterclockwise on the XY plane, the engaging pin 512 is engaged with the engaging groove. When engaged along the line 603 and the engaging pin 512 advances to the end part 603b, the base 510 and the lamp replacement jig 600 are completely fixed in the rotation direction (counterclockwise direction) and the Z direction.

  An annular leaf spring 605 is disposed on the back side of the indicator portion 604 (that is, the step portion on the inner peripheral surface). The leaf spring 605 is a member obtained by folding an annular thin plate made of a metal such as stainless steel. The leaf spring 605 is disposed so that the top of the mountain fold faces the tip side of the lamp replacement jig 600. When the lamp replacement jig 600 is mounted on the second body 511 of the base 510, the engagement pin 512 advances to the back of the engagement groove 602. At this time, the leaf spring 605 of the lamp replacement jig 600 is Since the base end surface of the two body portions 511 is urged toward the distal end side of the discharge lamp 500 along the axis BZ, the engagement pin 512 is fixed at the end portion 602b of the engagement groove 602 by this urging force. Therefore, the discharge lamp 500 can be held integrally with the lamp replacement jig 600. The engagement groove 603 and the engagement pin 512 are also engaged except that the main body 601 is rotated counterclockwise, and the engagement pin 512 is fixed at the end portion 603a. The leaf spring 605 may be replaced with various springs such as a disc spring as long as it has the above-described function.

  As described above, in the present embodiment, since the discharge lamp 500 is held using the lamp replacement jig 600, the discharge lamp 500 is replaced with a lamp unit even when the discharge lamp 500 is in a high temperature state. It can be removed from 100 and replaced with a new discharge lamp. For this reason, the downtime at the time of lamp replacement | exchange is shortened suitably.

  Next, a method for replacing the discharge lamp 500 using the lamp replacement jig 600 of the present embodiment will be described in detail. First, the case where the discharge lamp 500 is mounted on the lamp unit 100 will be described. When mounting the discharge lamp 500, first, the lamp replacement door 200 is opened, and the lamp unit 100 is exposed from the housing 10 (FIG. 1). Next, as shown in FIG. 9, the discharge lamp 500 is inserted into the engagement groove 602 provided at the tip of the main body 601 corresponding to the index “SET” attached to the index portion 604 of the lamp replacement jig 600. The engaging pin 512 provided in the base 510 is inserted, and the main body 601 is rotated clockwise until the engaging pin 512 is positioned at the end 602b of the engaging groove 602. The base 510 is connected.

  FIG. 10 is a diagram sequentially illustrating how the discharge lamp 500 is mounted on the lamp unit 100. As shown in FIG. 10A, the discharge lamp 500 integrated with the lamp replacement jig 600 is inserted into the opening 311 of the clamp 306 of the lamp holder 300. That is, as shown in FIG. 6A, the discharge lamp 500 is inserted with the central axis BZ aligned with the central axis AZ of the opening 311. When the discharge lamp 500 is inserted, the upper end surface 513 a of the flange 513 is the inner peripheral surface 309 a of the left flange engaging portion 309 of the clamp 306, and the lower end surface 513 b of the flange 513 is the right flange engaging portion 310 of the clamp 306. The direction of the discharge lamp 500 is adjusted using the lamp replacement jig 600 so as to face the inner peripheral surface 310a.

  When the discharge lamp 500 (that is, the cathode-side base 510) is adjusted in the correct direction and inserted into the clamp 306, the anode-side base 530 comes into contact with the anode connection portion 104 of the lamp unit 100 and the anode connection portion 104 is slightly Z. While pushing in the axial positive direction, the flange 513 stops against the front surface 306a of the clamp 306 (FIG. 6B). As described above, since the anode connecting portion 104 has a biasing means (not shown), it biases the discharge lamp 500 in the negative Z-axis direction by the repulsive force against the pressing of the base 530. Next, as shown in FIG. 10B, when the lamp replacement jig 600 is rotated about 90 ° clockwise in the XY plane with the flange 513 pressed against the clamp 306, the lamp replacement jig is obtained. The flange 513 rotates in accordance with the rotation of 600, and the peripheral edge (arc portion) of the flange 513 is accommodated in the left flange engaging portion 309 and the other in the right flange engaging portion 310, respectively. When the flange 513 is attached to the clamp 306, the biasing force of the plunger 315 is biased toward the Z-axis negative direction side, and the base 530 is biased toward the Z-axis negative direction side due to the biasing force of the anode connecting portion 104. The flange 513 is positioned in contact with the reference surface R of the clamp 306 with certainty.

  As shown in FIG. 10C, when the flange 513 is positioned in the left flange engaging portion 309 and the right flange engaging portion 310, the lever 301 is rotated around the lever shaft 302 to reverse the direction of the lever 301. Let As described above, since the pressing portion 312 protrudes from the opening 311 of the clamp 306 in accordance with the rotation of the lever 301, the first body portion 515 of the base 510 is pressed and fixed.

  After the lever 301 is rotated and the base 510 is fixed to the clamp 306, the lamp replacement jig 600 is rotated counterclockwise as shown in FIG. Release the engagement and pull out in the negative direction of the Z-axis. When the lamp replacement jig 600 is pulled out, the mounting of the discharge lamp 500 to the lamp unit 100 is completed as shown in FIG.

  When the mounting of the discharge lamp 500 is completed, the lamp replacement door 200 is closed and the lamp unit 100 is accommodated in the housing 10. When the power source of the light source device 1 is turned on and the lamp unit 100 is started, a high voltage is applied between the anode connecting portion 104 and the lamp holder 300 by a lighting circuit (not shown) of the lamp unit 100. The voltage applied to the anode connecting portion 104 is applied to the anode (not shown) in the bulb 521 via the anode-side base 530. The voltage applied to the lamp holder 300 is applied to the cathode (not shown) in the bulb 521 via the cathode-side base 510. As a result, a high voltage is applied between the anode and cathode in the bulb 521, dielectric breakdown occurs between the anode and cathode, and arc discharge starts. When the arc discharge starts, the lighting circuit supplies a current so as to maintain the arc discharge. For this reason, the discharge lamp 500 lights stably. As described above, in the present embodiment, since the flange 513 of the base 510 is accurately positioned on the reference plane R, the position of the arc bright spot in the bulb 521 coincides with the position of the first focus of the elliptical mirror 103. ing. For this reason, the light emitted from the discharge lamp 500 can be efficiently guided to the emission port of the light source device 1.

  Next, the case where the discharge lamp 500 that has reached the end of its life is replaced will be described. FIG. 11 is a diagram sequentially illustrating how the discharge lamp 500 is removed from the lamp unit 100. First, when the discharge lamp 500 is removed, the lamp replacement door 200 is opened so that the lamp unit 100 is exposed in the same manner as when the discharge lamp 500 is mounted. Next, as shown in FIG. 11A, the lamp replacement jig 600 is fitted into the second body 511 of the base 510. Specifically, the engagement pin 512 is inserted into the engagement groove 603 provided at the tip of the main body 601 corresponding to the index “RELEASE” attached to the index part 604 of the lamp replacement jig 600. Then, as shown in FIG. 11B, the main body 601 is rotated counterclockwise until the engagement pin 512 is positioned at the end 603b of the engagement groove 603, and the lamp replacement jig 600 and the base 510 are rotated. And connect.

  Next, as shown in FIG. 11C, the lever 301 is rotated around the lever shaft 302 to reverse the direction of the lever 301. As the lever 301 rotates, the pressing portion 312 moves in the positive direction of the Y axis, the pressing and fixing of the first body portion 515 of the base 510 is released, and the first portion 515 retracts to a position where it does not protrude into the opening 311. When the lever 301 is rotated and the pressing and fixing of the base 510 by the pressing portion 312 is released, the lamp replacement jig 600 is rotated approximately 90 ° counterclockwise as shown in FIG. At this time, since the flange 513 rotates with the rotation of the lamp replacement jig 600, the fitting between the plunger 315 and the dish pad 517 of the flange 513 is released.

  As shown in FIG. 11E, the lamp replacement jig 600 is rotated so that the flange 513 does not overlap the left flange engaging portion 309 and the right flange engaging portion 310 in the Z-axis direction, that is, the discharge lamp. 500 is moved to the same position (see FIG. 10 (b)) when it is inserted into the clamp 306. When the lamp replacement jig 600 is pulled in the negative Z-axis direction at that position, the flange 513 passes between the left flange engaging portion 309 and the right flange engaging portion 310, and the discharge lamp 500 is pulled out from the lamp unit 100. be able to. As shown in FIG. 11 (f), after the discharge lamp 500 is completely pulled out from the lamp unit 100 using the lamp replacement jig 600, a new discharge lamp 500 ′ with another lamp replacement jig 600 ′ attached thereto is obtained. Is attached to the lamp unit 100. Since the mounting of the discharge lamp 500 ′ is the same as the case of mounting the discharge lamp 500, the description is omitted.

  As described above, the present embodiment is configured such that the discharge lamp 500 can be replaced using the lamp replacement jig 600. Therefore, even when the discharge lamp 500 is replaced immediately after it is turned off due to factors such as lamp life or malfunction, the discharge lamp 500 is securely held without being directly touched to the high temperature base 510 and is pulled out from the lamp unit 100. A new discharge lamp 500 ′ can be mounted on the lamp unit 100 while avoiding erroneous mounting. For this reason, the downtime at the time of replacement | exchange of a discharge lamp can be shortened compared with replacement | exchange of a conventional discharge lamp.

  The above is the description of one embodiment of the present invention. Embodiments of the present invention are not limited to those described above, and various modifications are possible within the scope of the technical idea of the present invention. For example, in the present embodiment, it has been described that the base 510 includes the second body portion 511, but the second body portion 511 is not necessarily required.

  FIG. 12 is a view showing a modification of the discharge lamp 500 of the present embodiment. As shown in FIG. 12, in the present modification, the cathode side base 710 of the discharge lamp 700 is not provided with the second body portion, and is configured by only the first body portion 715 and the flange 713. This is different from the discharge lamp 500 of the form. Further, opening holes 725 and 726 are formed on the base end face side of the flange 713, and the lamp replacement jig 800 has projections 805 and 806 having a shape fitted to the opening holes 725 and 726, a screw portion 723, and a nut. 720a, spring washer 724b, and flat washer 724c are different from the base 510 and the lamp replacement jig 600 of the present embodiment in that a through hole 807 for accommodating the flat washer 724c is formed. Note that at least two opening holes 725 and 726 may be formed at symmetrical positions with the central axis CZ interposed therebetween. According to such a configuration, since the discharge lamp 700 can be rotated by fitting the protrusions 805 and 806 of the lamp replacement jig 800 into the opening holes 725 and 726 of the flange 713, as in the present embodiment, The discharge lamp 700 can be easily replaced.

  In the present embodiment, the insertion direction when the discharge lamp 500 is inserted into the lamp unit 100 is regulated by forming the flange 513 in an asymmetrical shape with respect to the central axis BZ. However, the present invention is limited to this configuration. Is not to be done. Other configurations may be applied as long as the insertion direction is restricted, and the lengths of Ll, Lr, La, Lb, and d may be changed as appropriate.

  Further, the flange 513 of the present embodiment is configured such that the distance from the axis AZ to the upper end surface 513a is shorter than the distance from the axis AZ to the lower end surface 513b, but conversely from the axis AZ to the upper end surface 513a. This distance may be longer than the distance from the central axis BZ to the lower end surface 513b. Further, in the present embodiment, the flange 513 has a shape in which the upper end and the lower end are respectively D-cut. However, the present invention is not limited to this configuration, and the outer peripheral edge of the flange 513 is in relation to the central axis BZ. Any shape that is asymmetry can be adopted.

  In the present embodiment, the outer peripheral edge of the flange 513 is non-axisymmetric with respect to a straight line (virtual straight line) extending through the central axis BZ and extending in the X-axis direction when viewed from the central axis BZ direction. It is formed in a line-symmetric shape with a straight line (virtual straight line) passing through the central axis BZ and extending in the Y-axis direction as a symmetric axis. If possible, other shapes can be applied.

  FIGS. 13-15 is a figure which shows the modification of the flange 513 formed in the nozzle | cap | die 510 of this embodiment. FIGS. 13A to 13F, FIGS. 14A to 14F, and FIG. 15A are modified examples of the flange 513 when viewed from the direction of the central axis BZ, as in FIG. 5A. For convenience of explanation, the flanges (parts corresponding to the flanges 513) of the respective modifications are indicated by solid lines, and the other parts (the outer periphery of the second body part 511, etc.) are indicated by broken lines. FIG. 15B is a perspective view of a base (a part corresponding to the base 510) in which the flange shown in FIG. 15A is formed. In FIGS. 13A to 13F, FIGS. 14A to 14F, and FIG. 15A, the unidirectional arrows indicate the X axis and the Y axis that are orthogonal to the central axis BZ.

  FIG. 13A is a diagram illustrating a first modification of the flange 513. The flange 513A of this modification is different from the flange 513 of this embodiment in that the receiving portion 514 is not formed. When the discharge lamp 500 is mounted on the lamp holder 300, the upper end surface 513Aa is a parallel pin. Rotation is restricted by contacting with 308. In this modification, the length (first length) of the imaginary perpendicular drawn from the upper end surface 513Aa of the flange 513A formed along the Y axis direction to the X axis is m1, and the lower end surfaces 513Ab to X The length (second length) of the virtual perpendicular to the axis is m2, and the outer peripheral edge of the flange 513A formed in the X-axis direction (that is, the left end surface 513Ac (arc portion) and the right side of the flange 513A) When the length (third length) of the imaginary straight line connecting the end surface 513Ad (arc portion) and the central axis BZ is n1, m1 and m2 are different and n1 is longer than either m1 or m2. It is formed to become. That is, the outer peripheral edge of the flange 513A of the present modification is formed in a non-linear symmetry with respect to the X axis and in a line symmetry with respect to the Y axis when viewed from the central axis BZ direction. It is formed asymmetric with respect to the central axis BZ. Therefore, according to the flange 513A having such a shape, when the discharge lamp 500 is inserted into the lamp unit 100, the insertion direction of the base 510A (that is, the direction of the discharge lamp 500) can be regulated.

  FIG. 13B is a diagram illustrating a second modification of the flange 513. The outer peripheral edge of the flange 513B of this modification is different from the flange 513 of this embodiment in that it is formed in an elliptical shape centered on the central axis BZ. That is, on the outer peripheral edge of the flange 513B of this modification, an upper end surface 513Ba on the Y axis direction positive side formed in an elliptical arc shape, a lower end surface 513Bb on the negative side in the Y axis direction formed in an elliptic arc shape, and an elliptical arc shape An X-axis direction negative side left end surface 513Bc and an X-axis direction positive side right end surface 513Bd formed in an elliptical arc shape are formed. In this modification, the length (first length) of the longest virtual perpendicular among the virtual perpendiculars drawn from the upper end surface 513Ba of the flange 513B formed along the Y-axis direction with respect to the X-axis is m1. The outer peripheral edge of the flange 513B formed in the X-axis direction, where m2 is the length of the longest virtual perpendicular (second length) among the virtual perpendiculars lowered from the lower end surface 513Bb with respect to the X-axis That is, when the length of the longest virtual straight line (third length) among the virtual straight lines connecting the center axis BZ (the left end face 513Bc and the right end face 513Bd of the flange 513B) is n1, m1 and m2 are And n1 is longer than both m1 and m2. That is, the outer peripheral edge of the flange 513B of this modification is formed in a non-linear symmetry with respect to the X axis and in a line symmetry with respect to the Y axis when viewed from the central axis BZ direction. It is formed asymmetric with respect to the central axis BZ. Therefore, according to the flange 513B having such a shape, when the discharge lamp 500 is inserted into the lamp unit 100, the insertion direction of the base 510B (that is, the direction of the discharge lamp 500) can be regulated.

  FIG. 13C is a diagram illustrating a third modification of the flange 513. The outer peripheral edge of the flange 513C of the present modified example has a shape in which the arc portion of the flange 513A of the first modified example is combined with part of the left end surface 513Bc and the right end surface 513Bd of the flange 513B of the second modified example. Yes. That is, the upper end surface 513Ca and the lower end surface 513Cb of the flange 513C are formed in an elliptical arc shape, and the first quadrant region of the right end surface 513Cd and the third quadrant region of the left end surface 513Cc are arcs centered on the central axis BZ. The region in the second quadrant of the left end surface 513Cc and the region in the fourth quadrant of the right end surface 513Cd are formed by elliptic arcs centered on the central axis BZ. In this modification, a concave portion 513Ce that is recessed in an arc shape is formed between the upper end surface 513Ca and the right end surface 513Cd, and a recessed portion 513Cf that is recessed in an arc shape is formed between the lower end surface 513Cb and the left end surface 513Cc. Has been. Also in this modification, the length (first length) of the longest virtual perpendicular among the virtual perpendiculars drawn from the upper end surface 513Ca of the flange 513C formed along the Y-axis direction with respect to the X axis is m1. The outer peripheral edge of the flange 513C formed in the X-axis direction, where m2 is the length of the length of the longest virtual perpendicular (second length) among the virtual perpendiculars lowered from the lower end surface 513Cb to the X-axis That is, when the length of the longest virtual straight line (third length) among the virtual straight lines connecting the center axis BZ (the left end face 513Cc and the right end face 513Cd of the flange 513C) is n1, m1 and m2 are And n1 is longer than both m1 and m2. That is, the outer peripheral edge of the flange 513C of this modification is formed in a non-linear symmetry with respect to the X axis and also in a non-linear symmetry with respect to the Y axis when viewed from the central axis BZ direction. And is formed asymptotically with respect to the central axis BZ. Therefore, the flange 513C having such a shape can restrict the insertion direction of the base 510C (that is, the direction of the discharge lamp 500) when the discharge lamp 500 is inserted into the lamp unit 100.

  FIG. 13D is a diagram illustrating a fourth modification of the flange 513. The outer peripheral edge portion of the flange 513D of the present modified example has four straight lines (that is, a polygonal shape) corresponding to the left end surface 513Ac (arc portion) and the right end surface 513Ad (arc portion) of the flange 513A of the first modified example. (Ii) is different from the flange 513A of the first modified example in that it is formed. Also in this modification, the length (first length) of the imaginary perpendicular drawn from the upper end surface 513Da of the flange 513D formed along the Y axis direction to the X axis is m1, and the lower end surface 513Db to X The length (second length) of the virtual perpendicular to the axis is m2, and the outer peripheral edge of the flange 513D formed in the X-axis direction (that is, the left end surface 513Dc and the right end surface 513Dd of the flange 513D) When the length (third length) of the virtual straight line connecting the central axis BZ is n1, m1 and m2 are different from each other, and n1 is longer than both m1 and m2. That is, the outer peripheral edge of the flange 513D of the present modification is formed in a non-linear symmetry with respect to the X axis and in a line symmetry with respect to the Y axis when viewed from the central axis BZ direction. It is formed asymmetric with respect to the central axis BZ. Therefore, according to the flange 513D having such a shape, the insertion direction of the base 510D (that is, the direction of the discharge lamp 500) can be restricted when the discharge lamp 500 is inserted into the lamp unit 100.

  FIG. 13E is a diagram illustrating a fifth modification of the flange 513. The outer peripheral edge portion of the flange 513E of this modification has a shape in which the right side of the flange 513B of the second modification and the left side of the flange 513A of the first modification are combined. That is, the left end surface 513Ec of the flange 513E is formed by an arc centered on the central axis BZ, and the right end surface 513Ed of the flange 513E is formed by an elliptical arc centered on the central axis BZ. Also in this modification, the length (first length) of the longest virtual perpendicular among the virtual perpendiculars drawn from the upper end surface 513Ea of the flange 513E formed along the Y-axis direction with respect to the X axis is m1. The length of the longest virtual perpendicular (second length) among the virtual perpendiculars lowered from the lower end surface 513Eb to the X axis is m2, and the outer peripheral edge of the flange 513E formed in the X axis direction (that is, When the length of the longest virtual straight line (third length) among the virtual straight lines connecting the left end face Ec and the right end face Ed) of the flange 513E and the central axis BZ is n1, m1 and m2 are different from each other, and It is formed so that n1 is longer than both m1 and m2. That is, the outer peripheral edge portion of the flange 513E of this modification is formed in a non-linear symmetry with respect to the X axis and also in a non-linear symmetry with respect to the Y axis when viewed from the central axis BZ direction. And is formed asymptotically with respect to the central axis BZ. Therefore, according to the flange 513E having such a shape, the insertion direction of the base 510E (that is, the direction of the discharge lamp 500) can be restricted when the discharge lamp 500 is inserted into the lamp unit 100.

  FIG. 13F is a diagram illustrating a sixth modification of the flange 513. The outer peripheral edge of the flange 513F of the present modification is along the outer periphery of the second body 511 with the lower left part (third quadrant area) and upper right part (first quadrant area) of the flange 513A of the first modification. The cutout portion 513Fg is formed in the first quadrant region, and the cutout portion 513Fh is formed in the third quadrant region. A concave portion 513Ff that is recessed in an arc shape is formed between the left end surface 513Fc of the flange 513F and the notch portion 513Fh, and a convex shape that protrudes in an arc shape is formed between the right end surface 513Fd and the notch portion 513Fg. Part 513Fe is formed. Also in this modification, the length (first length) of the longest virtual perpendicular among the virtual perpendiculars drawn from the upper end surface 513Fa of the flange 513F formed along the Y-axis direction to the X-axis is m1. The length of the longest virtual perpendicular (second length) among the virtual perpendiculars lowered from the lower end surface 513Fb with respect to the X axis is m2, and the outer peripheral edge of the flange 513F formed in the X axis direction (that is, When the length of the longest virtual straight line (third length) among the virtual straight lines connecting the left end surface 513Fc and the right end surface 513Fd) of the flange 513F and the central axis BZ is n1, m1 and m2 are different from each other, and It is formed so that n1 is longer than both m1 and m2. That is, the outer peripheral edge of the flange 513F of this modification is formed in a non-linear symmetry with respect to the X axis and also in a non-linear symmetry with respect to the Y axis when viewed from the central axis BZ direction. And is formed asymptotically with respect to the central axis BZ. Therefore, according to the flange 513F having such a shape, when the discharge lamp 500 is inserted into the lamp unit 100, the insertion direction of the base 510F (that is, the direction of the discharge lamp 500) can be regulated.

  FIG. 14A is a view showing a seventh modification of the flange 513. The flange 513G of this modification example has a first flange portion 513G1, a second flange portion 513G2, and a flange portion 513G1 extending in a direction of 45 °, 135 °, 225 °, and 315 ° around the central axis BZ. It is comprised from the 3rd flange part 513G3 and the 4th flange part 513G4. The upper ends of the first flange portion 513G1 and the second flange portion 513G2 are notched so as to be parallel to the X axis, and an upper end surface 513Ga is formed. The lower ends of the third flange portion 513G3 and the fourth flange portion 513G4 are notched so as to be parallel to the X axis, and a lower end surface 513Gb is formed. Also in this modification, the length (first length) of the longest virtual perpendicular among the virtual perpendiculars drawn from the upper end surface 513Ga of the flange 513G formed along the Y-axis direction to the X-axis is m1. The length of the longest virtual perpendicular (second length) among the virtual perpendiculars lowered from the lower end surface 513Gb to the X axis is m2, and the outer peripheral edge of the flange 513G formed in the X axis direction (that is, An imaginary straight line connecting the right end surface 513G1d of the first flange portion 513G1, the left end surface 513G2c of the second flange portion 513G2, the left end surface 513G3c of the third flange portion 513G3 and the right end surface 513G4d) of the fourth flange portion 513G4, and the central axis BZ. When the length (third length) of the longest virtual straight line is n1, m1 and m2 are different, and n1 is any of m1 and m2. It is formed to be longer. That is, the outer peripheral edge of the flange 513G of this modification is formed in a non-linear symmetry with respect to the X axis and in a line symmetry with respect to the Y axis when viewed from the central axis BZ direction. It is formed asymmetric with respect to the central axis BZ. Therefore, according to the flange 513G having such a shape, when the discharge lamp 500 is inserted into the lamp unit 100, the insertion direction of the base 510G (that is, the direction of the discharge lamp 500) can be regulated.

  FIG. 14B is a diagram illustrating an eighth modification of the flange 513. The flange 513H of the present modified example has a first flange portion 513H1 and a second flange formed so as to protrude in a substantially trapezoidal shape in directions of 30 °, 150 °, 210 °, and 330 ° around the central axis BZ. Part 513H2, third flange part 513H3, fourth flange part 513H4, fifth flange part 513H5 formed to protrude upward along the Y-axis direction, and downwardly protrude along Y-axis direction And a sixth flange portion 513H6 formed in the above. An upper end surface 513Ha parallel to the X axis is formed at the upper end of the fifth flange portion 513G5. A lower end surface 513Hb parallel to the X axis is formed at the lower end of the sixth flange portion 513G6. Also in this modification, the length (first length) of the longest virtual perpendicular among the virtual perpendiculars lowered from the upper end surface 513Ha of the flange 513H formed along the Y-axis direction with respect to the X-axis is m1. The length of the longest virtual perpendicular (second length) among the virtual perpendiculars lowered from the lower end surface 513Hb to the X axis is m2, and the outer peripheral edge of the flange 513H formed in the X axis direction (that is, The right end face 513H1d of the first flange part 513H1, the left end face 513H2c of the second flange part 513H2, the left end face 513H3c of the third flange part 513H3, and the right end face 513H4d of the fourth flange part 513H4) and the imaginary straight line connecting the central axis BZ. When the length (third length) of the longest virtual straight line is n1, m1 and m2 are different, and n1 is any of m1 and m2. It is formed to be longer. That is, the outer peripheral edge of the flange 513H of this modification is formed in a non-linear symmetry with respect to the X axis and in a line symmetry with respect to the Y axis when viewed from the central axis BZ direction. It is formed asymmetric with respect to the central axis BZ. Therefore, according to the flange 513H having such a shape, the insertion direction of the base 510H (that is, the direction of the discharge lamp 500) can be restricted when the discharge lamp 500 is inserted into the lamp unit 100.

  FIG. 14C is a diagram illustrating a ninth modification of the flange 513. The outer peripheral edge portion of the flange 513I of the present modification has a substantially sector shape as a whole by cutting out a part of the flange 513A of the first modification, and when viewed from the direction of the central axis BZ, A first flange portion 513I1 formed so as to protrude in a substantially trapezoidal shape on the right side (X axis direction positive side) along the axial direction, and a substantially fan shape on the left side (X axis direction negative side) along the X axis direction And a second flange portion 513I2 formed so as to overhang. An upper end surface 513Ia inclined downward with respect to the X axis is formed at the upper end of the second flange portion 513I2. In addition, a lower end surface 513Ib that is inclined upward with respect to the X axis is formed at the lower end of the second flange portion 513I2. Also in this modification, the length (first length) of the longest virtual perpendicular among the virtual perpendiculars drawn from the upper end surface 513Ia of the flange 513I formed along the Y-axis direction with respect to the X axis is m1. The length of the longest virtual perpendicular (second length) among the virtual perpendiculars lowered from the lower end surface 513Ib to the X axis is m2, and the outer peripheral edge of the flange 513I formed in the X axis direction (that is, When the length (third length) of the longest virtual straight line connecting the right end surface 513Id of the first flange portion 513I1 and the left end surface 513Ic of the second flange portion 513I2) and the central axis BZ is n1. , M1 and m2 are different from each other, and n1 is longer than both m1 and m2. That is, the outer peripheral edge of the flange 513I of this modification is formed in a non-linear symmetry with respect to the X axis and also in a non-linear symmetry with respect to the Y axis when viewed from the central axis BZ direction. And is formed asymptotically with respect to the central axis BZ. Therefore, according to the flange 513I having such a shape, when the discharge lamp 500 is inserted into the lamp unit 100, the insertion direction of the base 510I (that is, the direction of the discharge lamp 500) can be regulated.

  FIG. 14D is a diagram illustrating a tenth modification of the flange 513. The outer peripheral edge portion of the flange 513J of this modification has a rice ball-shaped shape with the left end surface 513Jc projecting greatly in the lower left direction and the right end surface 513Jd projecting in the lower right direction. Also in this modification, the length (first length) of the longest virtual perpendicular among the virtual perpendiculars drawn from the upper end surface 513Ja of the flange 513J formed along the Y-axis direction with respect to the X-axis is m1. The length of the longest virtual perpendicular (second length) among the virtual perpendiculars lowered from the lower end surface 513Jb with respect to the X axis is m2, and the outer peripheral edge of the flange 513J formed in the X axis direction (that is, When the length of the longest virtual straight line (third length) among the virtual straight lines connecting the left end face 513Jc and the right end face 513Jd) of the flange 513J and the central axis BZ is n1, m1 is different from m2. It is formed so that n1 is longer than both m1 and m2. That is, the outer peripheral edge of the flange 513J of this modification is formed in a non-linear symmetry with respect to the X axis and in a line symmetry with respect to the Y axis when viewed from the central axis BZ direction. It is formed asymmetric with respect to the central axis BZ. Therefore, according to the flange 513J having such a shape, the insertion direction of the base 510B (that is, the direction of the discharge lamp 500) can be restricted when the discharge lamp 500 is inserted into the lamp unit 100.

  FIG. 14E is a diagram illustrating an eleventh modification of the flange 513. The outer peripheral edge of the flange 513K of the present modification is different from the flange 513A of the first modification in that irregularities are formed in portions corresponding to the right end surface 513Ad and the lower end surface 513Ab of the flange 513A of the first modification. Is different. Also in this modification, the length (first length) of the imaginary perpendicular drawn from the upper end surface 513Ka of the flange 513K formed along the Y axis direction to the X axis is m1, and the lower end surface 513Kb to X The length (second length) of the longest virtual perpendicular to the axis is m2, and the outer peripheral edge of the flange 513K formed in the X-axis direction (that is, the right end face 513Kd and the left end face) 513Kc) and the length (third length) of the longest virtual line among the virtual lines connecting the central axis BZ is n1, m1 and m2 are different, and n1 is greater than either m1 or m2. It is formed to be long. That is, the outer peripheral edge portion of the flange 513K of this modification is formed in a non-linear symmetry with respect to the X axis and also in a non-linear symmetry with respect to the Y axis when viewed from the central axis BZ direction. And is formed asymptotically with respect to the central axis BZ. Therefore, according to the flange 513K having such a shape, when the discharge lamp 500 is inserted into the lamp unit 100, the insertion direction of the base 510I (that is, the direction of the discharge lamp 500) can be regulated.

  FIG. 14 (f) is a diagram showing a twelfth modification of the flange 513. The outer peripheral edge of the flange 513L of the present modification is different from the flange 513A of the first modification in that it includes an upper end surface 513La, a lower end surface 513Lb, a left end surface 513Lc, and a right end surface 513Ld, which are formed with a predetermined free curve. . Also in this modification, the length (first length) of the longest virtual perpendicular among the virtual perpendiculars drawn from the upper end surface 513La of the flange 513L formed along the Y-axis direction with respect to the X-axis is m1. The outer peripheral edge of the flange 513L formed in the X-axis direction, where m2 is the length of the longest virtual perpendicular (second length) among the virtual perpendiculars lowered from the lower end surface 513Lb with respect to the X-axis (That is, if the length (third length) of the longest virtual straight line among the virtual straight lines connecting the right end surface 513Ld and the left end surface 513Lc) and the central axis BZ is n1, m1 and m2 are different from each other, and It is formed so that n1 is longer than both m1 and m2. That is, the outer peripheral edge portion of the flange 513L of this modification is formed in a non-linear symmetry with respect to the X axis and also in a non-linear symmetry with respect to the Y axis when viewed from the central axis BZ direction. And is formed asymptotically with respect to the central axis BZ. Therefore, according to the flange 513L having such a shape, when the discharge lamp 500 is inserted into the lamp unit 100, the insertion direction of the base 510L (that is, the direction of the discharge lamp 500) can be regulated.

  FIGS. 15A and 15B are views showing a thirteenth modification of the flange 513. The flange 513M of this modification example has a columnar first flange portion 513M1 formed so as to protrude rightward (X-axis direction positive side) along the X-axis direction when viewed from the central axis BZ direction; A cylindrical second flange portion 513M2 formed so as to protrude to the left (X-axis direction negative side) along the X-axis direction, and protrudes downward (Y-axis direction negative side) along the Y-axis direction. It is comprised with the cylindrical 3rd flange part 513M3 formed in this way. That is, in this modification, a right end surface 513Md is formed at the tip of the first flange portion 513M1, a left end surface 513Mc is formed at the tip of the second flange portion 513M2, and a lower end surface 513Mb is formed at the tip of the third flange portion 513M3. It is formed. In this modification, since the flange 513M is not formed on the Y axis direction positive side (that is, the upper side), the outer peripheral surface 510Ma of the base 510M functions as the upper end surface of the flange 513M. Also in this modification, the length (first length) of an imaginary perpendicular drawn from the upper end surface of the flange 513M formed along the Y-axis direction (that is, the outer peripheral surface 510Ma of the base 510M) with respect to the X-axis. M1 and the length (second length) of the imaginary perpendicular drawn from the lower end surface 513Mb with respect to the X-axis to m2, and the outer peripheral edge of the flange 513M formed in the X-axis direction (that is, the first flange) M1 is different from m2 when the length (third length) of the imaginary straight line connecting the right end surface 513Md of the portion 513M1 and the left end surface 513Mc of the second flange portion 513M2) and the central axis BZ is n1. It is formed so that n1 is longer than both m1 and m2. That is, the outer peripheral edge of the flange 513M of this modification is formed in a non-linear symmetry with respect to the X axis and a line symmetry with respect to the Y axis when viewed from the central axis BZ direction. It is formed asymmetric with respect to the central axis BZ. Therefore, according to the flange 513M having such a shape, the insertion direction of the base 510M (that is, the direction of the discharge lamp 500) can be restricted when the discharge lamp 500 is inserted into the lamp unit 100. In this modification, the first flange portion 513M1, the second flange portion 513M2, and the third flange portion 513M3 have a columnar shape. For this reason, when the base 510M having the flange 513M of this modification is attached to the clamp 306 (that is, the first flange portion 513M1 is accommodated in the right flange engaging portion 310, and the second flange portion 513M2 is engaged with the left flange portion). The first flange portion 513M1 and the second flange portion 513M2 and the reference plane R abut on each other in a linear manner when accommodated in the joint portion 309. Thus, like the flange 513 of this embodiment and the flanges 513A to 510L of the first to twelfth modifications, the base end side of the flange does not necessarily have to be a plane, and is linear with respect to the reference plane R. The shape may be in contact with the reference surface R, or may be embossed on the flat surface so as to be in contact with the reference surface R in a dot shape.

  Moreover, in this embodiment and the 1st-13th modification, all are the longest virtual perpendiculars among the virtual perpendiculars drawn with respect to the X-axis from the upper end surface of the flange formed along the Y-axis direction. A length (first length) m1, a length (second length) m2 of the length of the longest virtual perpendicular from the lower end surface to the X axis, and the X axis direction. The length (third length) n1 of the longest virtual straight line among the virtual straight lines connecting the outer peripheral edge of the formed flange and the central axis BZ is defined, and the outer peripheral edge of the flange is determined from the relationship between these three parameters. Although the shape of the part is specified (that is, m1 and m2 are different and n1 is formed to be longer than both m1 and m2), the first to thirteenth modification examples The shape of the outer peripheral edge of the flange can be specified from other viewpoints. It is. For example, the length (first length) m1 of the longest virtual perpendicular out of the virtual perpendicular drawn from the upper end surface of the flange formed along the Y-axis direction to the X axis, and the X axis from the lower end surface The length (second length) m2 of the longest virtual perpendicular to the virtual perpendicular to be lowered, and the Y-axis from the outer peripheral edge of one end of the flange formed in the X-axis direction (that is, the right end face of the flange) The length of the longest perpendicular line (third length) n1 among the virtual perpendicular lines drawn with respect to Y and the outer peripheral edge of the other end of the flange formed in the X-axis direction (that is, the left end face of the flange) It is also possible to define the longest perpendicular length (fourth length) n2 among the virtual perpendiculars lowered with respect to the axis, and specify the shape of the outer peripheral edge of the flange from the relationship between these four parameters. In this case, in the flange 513 of the present embodiment and the flanges 513A to 510M of the first to thirteenth modified examples, the sum of n1 and n2 is longer than the sum of m1 and m2. Is formed.

  Further, in the discharge lamp 500 of the present embodiment, it has been described that the cut surface 516 in which a part of the outer peripheral surface is D-cut by the YZ plane is formed on the first body portion 515 of the base 510. Is not necessarily limited to such a configuration.

  As described above, in a state where the discharge lamp 500 is simply inserted into the lamp unit 100, the cut surface 516 faces the pressing portion 312 so that the discharge lamp 500 cannot be fixed. 500 is prevented from being erroneously mounted, but unless the base 510 is rotated and the discharge lamp 500 is correctly positioned on the lamp holder 300 (that is, the outer peripheral surface of the first body 515 of the base 510 does not face the pressing portion 312). As long as the discharge lamp 500 cannot be fixed, the cut surface 516 does not necessarily have to be a flat surface.

  16 and 17 are diagrams showing a modification of the discharge lamp 500 of the present embodiment. A discharge lamp 500A shown in FIG. 16 includes a groove portion 517 that extends in the circumferential direction on the outer peripheral surface of the first body portion 515 of the base 510 and is continuous with the cut surface 516. Different from 500. The groove portion 517 is formed in a predetermined range of the first body portion 515 facing the pressing portion 312 when the discharge lamp 500 is inserted into the lamp unit 100 and the base 510 is rotated clockwise. The width is slightly larger than the width (diameter) of the tip portion of the pressing portion 312, the depth of the groove portion 517 is deeper than the protruding amount when the pressing portion 312 protrudes into the opening 311, and the tip of the groove portion 517 is When the discharge lamp 500 is completely mounted, it extends to the front of the outer peripheral surface of the first body portion 515 that faces the pressing portion 312. That is, in this modification, the outer peripheral surface of the first body 515 does not face the pressing portion 312 until the discharge lamp 500 is completely mounted, and the discharge lamp 500 is fixed even if the lever 301 is rotated. It is configured not to be able to.

  A discharge lamp 500B shown in FIG. 17 is a further modification of the discharge lamp 500A shown in FIG. 16, and a groove portion 517M is formed over the distal end portion (end portion on the positive side in the Z-axis direction) of the first body portion 515. This is different from the groove 517 of the discharge lamp 500A shown in FIG. If the groove portion 517M is configured in this way, the outer peripheral surface of the first body portion 515 does not face the pressing portion 312 until the discharge lamp 500 is completely mounted, like the groove portion 517 of the discharge lamp 500A shown in FIG. The discharge lamp 500 cannot be fixed even if the lever 301 is rotated.

  As described above, in order to prevent erroneous mounting of the discharge lamp 500, the pressing portion 312 may be configured not to contact the first body portion 515 of the base 510 until the discharge lamp 500 is completely mounted. For example, when the discharge lamp 500 is completely mounted, only a predetermined area of the first body portion 515 that faces the pressing portion 312 is raised by one step (that is, the distance from the pressing portion 312 is shortened), and the others You may comprise so that a part may become one step lower (that is, the distance with the press part 312 may become long).

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

Claims (22)

An arc tube having a distal end and a proximal end;
A fixing base provided at the base end,
A discharge lamp that is mounted by inserting and rotating the lamp base having a predetermined reference surface into the lamp holder,
The fixing base is
A first cylindrical body having a common axis with the arc tube and accommodating the base end;
A flange portion formed so as to protrude from the outer peripheral surface of the first body portion;
With
When viewed from the axial direction , the flange portion has a length in a first direction orthogonal to the axial center that is longer than a length in a second direction orthogonal to the axial center and the first direction. Presents a shorter outer shape,
The flange portion is
An end face on the base end side formed on a plane defined by the first direction and the second direction ;
A short portion that is formed in the first direction and regulates the orientation of the fixing base when the fixing base is inserted into the lamp holder;
An elongated portion that is formed in the second direction and engages with the lamp holder when the fixing base is rotated;
With
When viewed from the axial direction, the outer peripheral edge of the flange is formed in a non-linear symmetry with respect to an imaginary straight line passing through the axial center and extending in the second direction, and the fixing base is A discharge lamp characterized in that an end surface on the base end side abuts on the reference surface when mounted on a lamp holder. The short portion is composed of one outer peripheral edge portion and the other outer peripheral edge portion formed across the axis,
With respect to a virtual straight line extending in a second direction perpendicular to the axis, the first length of the longest virtual perpendicular out of the virtual perpendiculars lowered from the one outer peripheral edge and the other outer peripheral edge is lowered. Unlike the second length of the longest virtual perpendicular among the virtual perpendiculars,
The long part is composed of an outer peripheral edge at one end and an outer peripheral edge at the other end formed across the axis.
The third length of the longest virtual straight line among the virtual straight lines connecting the axial center and the outer peripheral edge portions of the one end and the other end is any of the first length and the second length. The discharge lamp according to claim 1, wherein the discharge lamp is long. The short portion is composed of one outer peripheral edge portion and the other outer peripheral edge portion formed across the axis,
With respect to a virtual straight line extending in a second direction perpendicular to the axis, the first length of the longest virtual perpendicular out of the virtual perpendiculars lowered from the one outer peripheral edge and the other outer peripheral edge is lowered. Unlike the second length of the longest virtual perpendicular among the virtual perpendiculars,
The long part is composed of an outer peripheral edge at one end and an outer peripheral edge at the other end formed across the axis.
The third length of the longest perpendicular line drawn from the outer peripheral edge part of the one end and the perpendicular line drawn from the outer peripheral edge part of the other end with respect to the virtual straight line along the first direction orthogonal to the axis. 2. The discharge lamp according to claim 1, wherein the sum of the longest vertical line and the fourth length is longer than the sum of the first length and the second length. Each of the one outer peripheral edge part and the other outer peripheral edge part includes a linear part parallel to the second direction,
Wherein each of the outer peripheral edge portion of the outer peripheral edge portion and the other end of the one end, the discharge lamp according to claim 2 or claim 3, characterized in that it comprises an opposite circular arc portion in the second direction. The discharge lamp according to any one of claims 1 to 4 , wherein the flange portion has a plate shape. The lamp holder includes a protrusion that restricts rotation of the fixing base,
The discharge lamp according to any one of claims 1 to 5 , wherein the short part includes a receiving part that engages with the protrusion when the fixing base is rotated. When the fixing base is mounted on the lamp holder, the lamp holder abuts on an end surface on the distal end side of the flange portion, and biases the fixing base toward the proximal end side. Comprising first biasing means ;
The discharge lamp according to any one of claims 1 to 6 , wherein an end surface on the base end side abuts on the reference surface by a biasing force of the first biasing means . The discharge lamp according to claim 7 , wherein an end surface of the flange portion on the tip end side includes a dished portion into which the first urging means is fitted. The lamp holder includes a fixing means that protrudes and contacts the outer peripheral surface of the first body when the fixing base is mounted on the lamp holder, and fixes the fixing base.
The first body portion includes, on an outer peripheral surface, a first area where the fixing means can contact, and a second area where the fixing means cannot contact,
When the fixing base is not rotated, the second area faces the fixing means, and when the fixing base is rotated, the first area faces the fixing means. The discharge lamp according to any one of claims 1 to 8 , wherein the discharge lamp is characterized. 10. The discharge lamp according to claim 9 , wherein the second region has a flat portion obtained by notching an outer peripheral surface of the first body portion with a surface parallel to the axis. 11. The discharge lamp according to claim 10 , wherein the second region has a groove portion that is continuous with the planar portion and is formed from the planar portion to the first region. The arc tube includes a tip portion for enclosing and sealing a discharge medium, and when the fixing base is mounted on the lamp holder, the tip portion is below a horizontal plane including the axis. The discharge lamp according to any one of claims 1 to 11 , wherein the discharge lamp is disposed other than directly below the axis. When viewed from the axial direction, the tip portion is arranged such that a virtual straight line connecting the axial center and the tip portion intersects a horizontal plane including the axial center at an angle of approximately 45 °. 13. A discharge lamp according to claim 12 , characterized in that 2. The first body portion includes a plurality of opening holes that are disposed at symmetrical positions about the axis and that open to an end surface of the first body portion on the base end side. The discharge lamp according to claim 13 . The flange portion is provided at an end of the first body portion on the base end side,
The fixing base has an axial center common to the first body portion, and has a second body portion that protrudes in a cylindrical shape from an end surface of the flange portion on the base end portion side. The discharge lamp according to any one of claims 1 to 13 . The discharge lamp of claim 15 , wherein the second body includes a protrusion that protrudes vertically from the outer peripheral surface. A discharge lamp attaching / detaching tool attached to the discharge lamp according to claim 16 for attaching / detaching the discharge lamp to / from the lamp holder,
A substantially cylindrical fitting portion that accommodates the second body portion and fits with the protruding portion;
A grip portion formed integrally with the fitting portion and gripped by a user;
A discharge lamp attaching / detaching tool comprising: The fitting portion has an inner diameter larger than an outer diameter of the second body portion and an outer diameter smaller than an outer peripheral edge portion of the flange portion, and an inner peripheral surface to an outer peripheral surface of the fitting portion. A first groove extending through and extending in parallel along the axis of the fitting portion, and a second groove extending from the first groove and extending in the circumferential direction of the fitting portion. With a fitting groove,
Said protrusion, by fitting in order to said first groove and said second groove, according to claim 17, wherein the fitting portion, characterized in that it is integrally fixed to the fixed die Discharge lamp removal tool. The discharge lamp according to claim 18 , wherein the fitting portion includes a second fitting groove formed in a plane symmetry with the first fitting groove at a position facing the first fitting groove. Detachable tool. The discharge lamp attaching / detaching tool according to claim 19 , wherein the grip portion includes an index indicating a position corresponding to the first fitting groove and a position corresponding to the second fitting groove. The fitting portion includes second urging means for urging the second body portion toward the distal end portion when the fitting portion is integrally fixed to the fixing base. The discharge lamp attaching / detaching tool according to any one of claims 17 to 20 . A discharge lamp attaching / detaching tool attached to the discharge lamp according to claim 14 for attaching / detaching the discharge lamp to / from the lamp holder,
A fitting portion having a substantially cylindrical shape having an outer diameter smaller than the outer peripheral edge portion of the flange portion, and a plurality of protrusions fitting with the plurality of opening holes,
A grip portion formed integrally with the fitting portion and gripped by a user;
A discharge lamp attaching / detaching tool comprising:

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