JP2013004434A - High-pressure discharge lamp and luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate disposition of adhesive to a salient of an outer tube of a high-pressure discharge lamp on the tip side thereof in the tube axis direction of the outer tube, thereby more surely preventing the outer tube from coming off a mouth piece.SOLUTION: A high-pressure discharge lamp 100 has an inner tube 300 having a discharge tube 200 disposed therein accommodated in a space enclosed with a mouth piece 400 and an outer tube 500. The outer tube 500 includes an opening at one end 501 and at least one salient 502 protruding to the inside and also includes a blocked part at other end 503. The mouth piece 400 includes a body part 402 having a power feeding terminal 401 and a connection part 404 which is, at least partly, accommodated in the opening of the outer tube 500 and provided with an opening 403 on the power feeding terminal 401 side. On the outside face of the connection part 404 is provided a guide which guides adhesive 101 for bonding the connection part 404 and the outer tube 500 to the salient 502 from the opening 403 to the other end 503 side in a tube axis Xdirection of the outer tube 500.

Description

  The present invention relates to a high-pressure discharge lamp and a lighting device.

  An exploded perspective view of a conventional high-pressure discharge lamp is shown in FIG. A conventional high-pressure discharge lamp (hereinafter referred to as “lamp 1”) has a base body in which a lamp body 4 in which an arc tube 3 such as a ceramic metal halide lamp is housed in a glass hermetic tube 2 is housed in an outer tube 5. The base 6 is attached to the base 6 with a contact terminal 7 electrically connected to a socket (not shown), the lamp body 4 and the outer tube 5 in a state of holding the base body 8. The mounting base 9 is fitted with a through hole 11 through which the pinch seal portion 10 of the airtight tube 2 is inserted and held, and the outer tube opening end 5a is brought into contact with the outer peripheral surface. A flange 12 is formed, and a joint portion is formed to mutually engage the outer peripheral surface of the mounting base 9 and the inner peripheral surface of the outer tube. The outer tube is mounted on the bottom surface side of the mounting base facing the base body. In the state Adhesive injection port 13 for filling the adhesive is opened and formed in parts.

  The joint portions are provided at two locations facing the radial direction along the circumferential direction of the outer tube 5 and the mounting base 9, and between the outer circumferential surface 9 a of the mounting base 9 and the inner circumferential surface 5 b of the outer tube facing each other. Facing the gap formed therebetween, the engagement recess 14 formed on the outer peripheral surface 9a of the mounting base 9 and the engagement protrusion 15 formed on the inner peripheral surface 5b of the outer tube 5, the heat resistance filled in the gap It consists of a joint in-molded with an adhesive (not shown).

  The engaging recess 14 has a guide groove 14a that is narrow enough to guide the engaging protrusion 15 formed on the outer tube 5 in the axial direction, and the engaging protrusion 15 is guided into the guide groove 14a and is outside. In the state where the open end 5a of the tube 5 is in contact with the flange 12 of the mounting base 9, the tube 5 is formed with an engagement groove 14b wide enough to rotate the outer tube 5 in the circumferential direction and hook the engagement protrusion 15. The upper surface side of the mounting base 9 of the engaging groove 14b is formed in a horizontal engaging portion 14c that engages with the engaging protrusion 15.

  Further, the engagement recess 14 is formed by cutting the flange 12 to the bottom surface 9b of the mounting base 9, and the bottom surface 9b side is opened as an adhesive injection port 13 for injecting a heat-resistant adhesive into the joint portion. (For example, refer to Patent Document 1).

JP 2010-182508 A

The inventors examined the lamp 1 used in the market, and as shown in FIG. 21, the bonding projection 15 (the convex portion of the outer tube) was bonded in a state where the projection 1 was positioned in the guide groove 14a. It was found that they were adhered by an agent (not shown). In this case, if the bonding between the outer tube 5 and the adhesive is removed, the horizontal locking portion 14c cannot be locked, and the outer tube 5 may be detached from the mounting base 9. In the direction of the tube axis X ₅ of the outer tube 5 of the lamp 1, it is necessary to dispose an adhesive on the front end side of the lamp 1 with respect to the engaging protrusion 15. In the tube axis X ₅ direction, relative to the engaging projection 15, if the adhesive is disposed on the distal end side of the lamp 1, as the adhesion between the outer tube 5 and the adhesive is out, the adhesive itself This is because it plays the same role as the horizontal engagement portion 14 c and can prevent the outer tube from coming off the mounting base 9.

However, according to the study by the inventors, in the case of the lamp 1, when the adhesive is injected from the adhesive inlet 13, the front end of the lamp 1 is in the tube axis X ₅ direction with respect to the engagement protrusion 15 of the outer tube 5. It turned out that it was difficult to distribute the adhesive.

As shown in FIG. 22, when the adhesive 16 is injected from the adhesive inlet 13, the adhesive 16 is prevented from flowing in the tube axis direction by the engagement protrusion 15 and the engagement horizontal portion 14 c of the outer tube 5. Will be. In this case, an adhesive 16 large amount injected, also push the adhesive 16 on the distal end side of the lamp 1 in the tube axis X ₁ direction from between the engaging projection 15 and the engaging horizontal portion 14c of the outer tube 5 Though conceivable, the adhesive 16 pushed back by the engagement protrusion 15 overflows from the adhesive injection port 13.

  Therefore, the high-pressure discharge lamp according to the present invention makes it easier to dispose the adhesive on the tip side with respect to the convex portion of the outer tube in the tube axis direction of the outer tube, and more reliably prevent the outer tube from coming off the base The purpose is to make it easier.

  Another object of the lighting device according to the present invention is to improve reliability by using a high-pressure discharge lamp that can more easily prevent the outer tube from being detached from the base.

  In order to solve the above problems, a high pressure discharge lamp according to the present invention is a high pressure discharge lamp in which an inner tube in which a discharge tube is disposed is housed in a space surrounded by a base and an outer tube, The outer tube has an opening at one end and a projecting portion protruding at least one inside, and a closing portion at the other end. The base includes a main body having a power supply terminal, and at least a part thereof. Is provided in the opening of the outer tube and has a connection portion provided with an opening on the power supply terminal side, and an adhesive that bonds the connection portion and the outer tube to the outer surface of the connection portion Is provided to the other end side in the tube axis direction of the outer tube with respect to the convex portion from the opening, and between the connecting portion and the outer tube, On the other hand, the adhesive is arranged on the other end side in the tube axis direction of the outer tube. It is characterized in.

  A high pressure discharge lamp according to the present invention is a high pressure discharge lamp in which an inner tube having a discharge tube disposed therein is accommodated in a space surrounded by a base and an outer tube, and the outer tube is disposed at one end. It has an opening and at least one protrusion protruding outward, and has a closing portion at the other end. The base has a main body having a power supply terminal, and at least a part of the opening of the outer tube. And a connecting portion provided with an opening on the power supply terminal side, and an adhesive for bonding the connecting portion and the outer tube is formed on the inner surface of the connecting portion from the opening to the convex portion. A guide that leads to the other end side in the tube axis direction of the outer tube is provided between the connecting portion and the outer tube, and the tube axis of the outer tube with respect to the convex portion A high-pressure discharge lamp characterized in that the adhesive is arranged on the other end side in the direction

  In the high-pressure discharge lamp according to the present invention, the guide may have a portion that moves away from the convex portion in the tube axis direction as it approaches the convex portion in the circumferential direction of the connection portion.

  The lighting device according to the present invention includes a high-pressure discharge lamp and a lighting fixture to which the high-pressure discharge lamp is attached.

  The high-pressure discharge lamp according to the present invention makes it easier to dispose the adhesive on the tip side with respect to the convex portion of the outer tube in the tube axis direction of the outer tube, and more easily prevent the outer tube from coming off the base. can do.

  Moreover, the illuminating device according to the present invention can improve reliability by using a high-pressure discharge lamp that can more reliably prevent the outer tube from being detached from the base.

1 is an exploded perspective view of a high pressure discharge lamp according to a first embodiment of the present invention. (A) Front view of high pressure discharge lamp, (b) Right side view of high pressure discharge lamp Cross-sectional view including the tube axis of the discharge tube of the same high-pressure discharge lamp A perspective view of the base of the same high-pressure discharge lamp The principal part enlarged front view of Fig.2 (a) Conceptual diagram of the adhesive injection process The top view of the nozzle | cap | die of the high pressure discharge lamp which concerns on the 1st Embodiment of this invention The disassembled perspective view of the high pressure discharge lamp which concerns on the 2nd Embodiment of this invention. (A) Front view of high pressure discharge lamp, (b) Right side view of high pressure discharge lamp A perspective view of the base of the same high-pressure discharge lamp A perspective view of the peripheral wall of the base of the same high-pressure discharge lamp Partially cutaway front view of a lighting apparatus according to a third embodiment of the present invention The perspective view of the modification 1 of the nozzle | cap | die of the high pressure discharge lamp which concerns on the 1st Embodiment of this invention. The perspective view of the modification 2 of a base of a high pressure discharge lamp similarly Similarly, perspective view of Modification 3 of the base of the high-pressure discharge lamp The perspective view of the modification 4 of a base of a high pressure discharge lamp similarly The perspective view of the modification 5 of a base of a high pressure discharge lamp similarly The perspective view of the modification 6 of a base of a high pressure discharge lamp similarly The perspective view of the modification 7 of a base of a high pressure discharge lamp similarly Exploded perspective view of a conventional high pressure discharge lamp Similarly, front view of high-pressure discharge lamp Similarly, conceptual diagram of the bonding process between the outer tube of the high-pressure discharge lamp and the mounting base

(First embodiment)
FIG. 1 is an exploded perspective view of the high-pressure discharge lamp according to the first embodiment of the present invention, FIG. 2 (a) is a front view thereof, and FIG. 2 (b) is a right side view thereof. In the high pressure discharge lamp (hereinafter referred to as “lamp 100”) according to the first embodiment of the present invention, an inner tube 300 in which a discharge tube 200 is disposed is surrounded by a base 400 and an outer tube 500. For example, a metal halide lamp is accommodated in the space. For convenience of explanation, FIGS. 2A and 2B do not show an adhesive 101 described later.

1. The cross-sectional view including the tube axis X ₂₀₀ of the discharge tube 200 for discharge tube shown in FIG. Discharge tube 200 has an outer circumference comprising a formed tube portion 203 Metropolitan so as to extend the tube axis X ₂₀₀ opposite sides of the main tube 202 and the main portion 202 to form a discharge space 201 therein A container 205 is provided.

The main pipe section 202 and the thin pipe sections 203 and 204 are tubular (here, the cross-sectional shape is circular), and have dimensions (here, an inner diameter) in the direction perpendicular to the pipe axis X ₂₀₀ in the main pipe section 202. And the outer diameter) are larger than the dimensions (inner diameter / outer diameter) of the narrow tube portions 203 and 204.

  The main pipe section 202 and the narrow pipe sections 203 and 204 (that is, the envelope 205) are made of, for example, a translucent ceramic. As the translucent ceramic, for example, an alumina ceramic can be used. Other ceramics such as rare earth alumina garnet ceramics may be used, or quartz glass may be used.

In the drawing, the discharge tube 200 is an integrated type in which the main tube portion 202 and the thin tube portions 203 and 204 are integrally formed. However, the main tube portion 202 is formed by joining a plurality of members. May be. For example, a thin tube portion 203 or 204 is integrally formed at the end of a member that is half-cut in a direction orthogonal to the tube axis X ₂₀₀ at the center of the main tube portion 202, and these are formed as a set of two, and the center of the main tube portion 202 is formed. may also be a surface corresponding to the sections that are formed by bonding, and cut in a horizontal direction to the tube axis X ₂₀₀ of a and main tube 202 and a main portion 202 and the narrow tube portion 203, 204 The shape members may be formed separately, and the surfaces corresponding to the sections may be joined.

  Moreover, the shrink-fit type of joining after forming the main pipe part 202 and the thin pipe parts 203 and 204 separately may be used. In this case, the main pipe part may be formed of a cylindrical member and a ring member, and the cylindrical member and the ring member may be joined together and the ring member and the narrow pipe part may be joined by shrink fitting.

The main tube section 202 is located inside the discharge space 201 on the central axis in the longitudinal direction of the lamp 100 shown in FIG. 1 (hereinafter, also simply referred to as “lamp axis X ₁₀₀ ”) or parallel to the lamp axis X ₁₀₀ . A pair of electrodes 206 and 207 that are substantially opposed to each other on an axis are provided.

  In the discharge space 201, for example, metal halides that are luminescent materials, rare gases that are start-up auxiliary gases, and mercury that is a buffer gas are sealed in predetermined amounts. Examples of the metal halide include sodium iodide, dysprosium iodide, holmium iodide, thulium iodide, thallium iodide, cerium iodide, praseodymium iodide, neodymium iodide, calcium iodide, lithium iodide, and iodide. Indium, scandium iodide, or the like is used.

  As shown in FIG. 3, the electrodes 206 and 207 include electrode rods 208 and 209 and electrode coils 210 and 211 provided at the ends of the electrode rods 208 and 209 on the tip side (discharge space 201 side). Yes.

  As shown in FIG. 3, molybdenum coils 212 and 213 are formed in the electrode rods 208 and 209 in the gap between the electrode rods 208 and 209 and the thin tube portions 203 and 204 to prevent the light emitting material from entering the gap. It may be wound.

Ideally (design), the electrodes 206 and 207 are arranged so as to face each other on the lamp axis X ₁₀₀ , that is, the central axes of the electrode rods 208 and 209 are arranged on the lamp axis X _100. . However, in practice, the central axis may not be on the lamp axis X _{100 due to} the accuracy of the process.

  In each of the thin tube portions 203 and 204, power feeders 214 and 215 in which the respective electrodes 208 and 209 are joined to the distal end portion (the end portion opposite to the discharge space) are inserted. The power feeders 214 and 215 are composed of internal power feed lines 216 and 217 and external power feed lines 218 and 219. The internal power supply lines 216 and 217 and the external power supply lines 218 and 219 are joined by welding, for example.

  The internal power supply lines 216 and 217 are conductive cermets in which molybdenum and ceramic are mixed and sintered, for example.

  The external power supply lines 218 and 219 are, for example, nickel.

  Ceramic cylinders 220 and 221 may be fitted into connecting portions between the internal power supply lines 216 and 217 and the external power supply lines 218 and 219. In this case, the connection between the internal power supply lines 216 and 217 and the external power supply lines 218 and 219 can be reinforced.

Furthermore, niobium or tantalum ring members 222 and 223 may be provided between the end surfaces of the thin tube portions 203 and 204 and the ceramic cylinders 220 and 221. In this case, it is possible to suppress the generation of CO or CO ₂ bubbles in the frit that seals the gap formed between the power feeders 214 and 215 and the thin tube portion, which will be described later.

  The power feeders 214 and 215 are sealed by sealing materials 224 and 225 made of frit that flow into the end portions of the narrow tube portions 203 and 204 opposite to the main tube portion 202.

  In FIG. 3, for convenience of illustration, the electrodes 206 and 207, the molybdenum coils 212 and 213, and the power feeders 214 and 215 are shown without being cut in a cross section.

2. Regarding the Inner Tube Returning to FIG. 1, the inner tube 300 is, for example, a single-sealed airtight container including a sealing portion 301, a tip portion 302, and an intermediate portion 303.

  The sealing portion 301 is formed by, for example, crush sealing by a pinch seal method, and constitutes the end portion on the base 400 side of the inner tube 300. The sealing portion 301 includes one end portion of power supply lines 304 and 305 connected to the external power supply lines 218 and 219 of the discharge tube 200, the entire metal foil 306 and 307, and one end portion of the introduction lines 308 and 309, respectively. And are sealed.

  As shown in FIG. 1, in the sealing portion 301, a portion (outer surface) in contact with the pinch when pressed by the pinch is a flat surface 301a, and a portion (outer surface) not in contact with the pinch is between the pinches. Bulges in a direction perpendicular to the pressing direction to form a bulging surface 301b.

  The distal end portion 302 constitutes an end portion on the opposite side to the base 400 of the inner tube 300. The tip portion 302 has a tip-off portion 310 that is the remaining portion of an exhaust pipe (not shown) used when evacuating the inside of the inner pipe 300. By evacuating the inner tube 300, it is possible to prevent metal members such as the power feeders 214 and 215 and the power supply lines 304 and 305 from being exposed to high temperatures and being oxidized. “Vacuum drawing” means that the pressure is reduced to such an extent that the loss of aesthetics caused by oxidation of the metal member due to oxygen contained in the atmosphere is not significant, and practically 0.1 atm or less. If so, it has little effect on the aesthetics.

  Note that the metal member can be prevented from being oxidized by filling the inner tube 300 with an inert gas such as nitrogen instead of evacuating the inner tube 300.

  2A and 2B, for example, a getter member 311 may be disposed on the power supply line 304 in order to adsorb an impurity gas such as oxygen in the inner tube 300.

  For example, when the tip portion 302 has a substantially hemispherical shape or a flat shape, the outer diameter of the intermediate portion 303 is 13 [mm] to 17 [mm], and the wall thickness is 1 [mm] to 2 [mm]. In the inner tube 300, the intermediate portion 303 has, for example, a substantially cylindrical shape, and the envelope 205 of the discharge tube 200 is disposed in the intermediate portion 303. The shape of the intermediate portion 303 is not limited to a substantially cylindrical shape, and may be a cylinder other than a cylinder such as a polygonal or elliptical cylinder. Further, the inner diameter and the outer diameter of the intermediate portion 303 are not necessarily uniform along the tube axis direction of the inner tube 300. For example, as shown in FIGS. 2 (a) and 2 (b), the main tube of the discharge tube 200 is used. A shape in which the inner diameter and the outer diameter at a position corresponding to the portion 203 are larger than the inner diameter and the outer diameter at other positions, that is, a middle-bulged shape having a bulged portion in part. Thereby, it can suppress that the temperature of the discharge tube 200 rises excessively.

  The inner tube 300 is made of, for example, quartz glass. The inner tube 300 is not limited to the one formed of quartz glass, and may be formed of a light-transmitting ceramic such as alumina ceramic or a hard glass such as borosilicate glass.

  The base 400 side of the inner tube 300 is fixed to a connecting portion 402 of the base 400, which will be described later, via an adhesive such as cement (not shown).

3. About the outer tube The outer tube 500 has an opening 501 and at least one convex portion 502 projecting inward at one end, and a closing portion 503 at the other end.

  In the present invention, the “projecting portion protruding inward” is not limited to the one protruding locally on the inside as shown in FIG. It is only necessary that the inner peripheral surface of the opening 501 of the tube 500 has a portion that is deformed inward to some extent.

  Specifically, the outer tube 500 includes, for example, an opening (one end) 501, a closing part (other end) 503, and an intermediate part 504 between the opening 501 and the closing part 503. When the inner tube 300 is damaged due to the rupture of the discharge tube 200, it has a role of preventing the fragments generated by the rupture and the damage from being scattered. Therefore, even if it uses for the lighting fixture (not shown) with the light irradiation side opened, it can prevent that a fragment | piece is scattered.

  The outer tube 500 is made of hard glass, for example. The outer tube 500 is not limited to the one made of hard glass, but may be made of a light transmitting ceramic such as alumina ceramic, quartz glass, or the like.

  The closing part 503 is preferably substantially hemispherical or flat. Moreover, it is not necessarily required to close with the same member, and may be closed with another member such as metal or ceramic.

  The intermediate portion 504 has a shape in which, for example, the inner diameter and the outer diameter at a position corresponding to the main section 202 of the discharge tube 200 are larger than the inner diameter and the outer diameter at other positions, that is, partially bulges It is a bulging shape having a portion 505. Selection of a suitable lighting fixture (not shown) that can withstand tolerance from the strain point of hard glass by reducing the temperature rise of the outer tube 500 due to heat from the discharge tube 200 by providing the bulging portion 505 Can be widened. Furthermore, the gap may be designed to be 5 [mm] at the maximum. In this case, safety when the discharge tube 200 is damaged can be improved.

  Note that the shape of the intermediate portion 504 is not limited to the middle expansion shape, and may be a substantially cylindrical shape. The shape of the intermediate portion 504 is not limited to a substantially cylindrical shape, and may be a cylinder other than a cylinder such as a polygonal or elliptical cylinder.

  In the lamp 100, the maximum outer diameter of the outer tube intermediate portion 504 is 16 [mm] to 29 [mm], and in this case, it can be easily adapted to a compact lighting fixture. The wall thickness of the outer tube middle part may be 1 [mm] to 2 [mm].

  The difference between the minimum inner diameter of the outer tube 500 and the maximum outer diameter of the inner tube may be in the range of 0.5 [mm] or more and 3.0 [mm] or less. In this case, the outer tube 500 can be easily covered with the inner tube 300 in the assembly process of the lamp 100.

  The outer tube 500 is bonded to the base 400 using an adhesive (not shown) such as cement. The inside of the outer tube 500 may be in an atmospheric state in which the inside and the outside of the outer tube 500 communicate with each other via a vent hole (not shown) of the base 400, or the vent hole (not shown) is blocked. Therefore, it may be in a reduced pressure state or may be filled with an inert gas.

4). About the base A perspective view of the base is shown in FIG. The base 400 has a main body portion 402 having a power supply terminal 401 and a connection portion 404 in which at least a part thereof is housed in the opening 501 of the outer tube 500 and an opening 403 is provided on the power supply terminal 401 side. ing.

  The main body portion 402 is formed of, for example, an insulator, and a connection portion fixing portion 405 for fixing the connection portion 404 is provided on the connection portion 404 side.

  As shown in FIG. 1, the connecting portion fixing portion 405 is a recess that can accommodate at least a part of the connecting portion 404, for example. The connecting portion fixing portion 405 may be provided with a fitting protrusion 407 that fits with the fitting recess 406 of the connecting portion 404. In this case, when the connection portion 404 is fixed to the connection portion fixing portion 405, it is possible to easily align the connection portion 404 and the connection portion fixing portion 405.

  The power supply terminal 401 includes, for example, a shell part 408 and an eyelet part 409.

  The connection unit 404 includes, for example, an outer tube side connection unit 410, a main body unit side connection unit 411, and a flange unit 412 provided on the outer periphery between the outer tube side connection unit 410 and the main unit unit side connection unit 411. .

For example, when the outer tube side connection portion 410 is viewed from the direction of the tube axis X ₅₀₀ of the outer tube 500, the outer peripheral surface thereof is shaped along the inner peripheral surface of the opening 501 of the outer tube 500 (in the case of FIGS. 1 and 4). And has an inner tube fixing portion 413 for fixing the sealing portion 301 of the inner tube 300 on the side opposite to the main body portion 402. The inner tube fixing portion 413 is, for example, a through hole from a surface on the opposite side of the main body portion 402 of the outer tube side connection portion 410 to a surface on the main body portion 402 side of the main body portion side connection portion 411. As shown in FIG. 1, the inner tube fixing portion 413 may be provided with a pair of clamping portions 414 at positions where the flat portion 301 b of the inner tube 300 is sandwiched when the sealing portion 301 of the inner tube 300 is inserted. . In addition, it is preferable that the clamping part 414 inclines to the main-body part 402 side toward the mutually opposing side. In this case, when the sealing portion 301 of the inner tube 300 is inserted into the inner tube fixing portion 413, the sealing portion 301 of the inner tube is not easily caught by the sandwiching portion 414, and can be easily inserted.

  As shown in FIG. 1, the sealing portion 301 of the inner tube 300 is bonded by an adhesive (not shown) while being inserted into the inner tube fixing portion 412, for example.

  The main body portion side connection portion 411 has, for example, a substantially cylindrical shape, and is connected to the connection portion fixing portion 405 of the main body portion 402. The connection portion 404 and the connection portion fixing portion 405 are bonded with, for example, an adhesive (not shown).

The flange portion 412 is configured so that the edge of the opening portion 501 of the outer tube 500 abuts on the tube axis X of the outer tube 500 in a state where the outer tube side connection portion 410 is housed in the opening portion 501 of the outer tube 500. The position in ₅₀₀ directions can be adjusted.

On the outer surface of the connecting portion 404, an adhesive (not shown) for bonding the connecting portion 404 and the outer tube 500 is connected to the other end of the outer tube 500 in the direction of the tube axis X ₅₀₀ from the opening 403 to the convex portion 502. A guide that leads to the portion 503 side is provided. In the present embodiment, the guide is a part of the wall of the groove portion 415 formed on the side surface of the connection portion 404.

The groove portion 415 includes, for example, a vertical groove portion 415 a along the tube axis X ₅₀₀ direction of the outer tube 500 and a horizontal groove portion 415 b extending from the vertical groove portion 415 a in the circumferential direction of the connection portion 404. In this case, the guide is a wall 415c of the tube axis X ₅₀₀ direction of the other end portion 503 side of the outer tube 500 in the lateral groove portion 415b. Specifically, the wall 415c is separated from the opening 403 toward the longitudinal groove 415a.

FIG. 5 shows an enlarged front view of the main part of FIG. As shown in FIG. 5, the adhesive 101 is disposed between the connection portion 404 and the outer tube 500 and on the other end portion 503 side in the tube axis X ₅₀₀ direction of the outer tube 500 with respect to the convex portion 502. Yes. The wall 415 c serving as a guide is separated from the convex portion 502 in the tube axis X ₅₀₀ direction of the outer tube 500 as it approaches the convex portion 502 of the outer tube 500 in the circumferential direction of the connecting portion 404. The mechanism will be described below.

A conceptual diagram of the adhesive injection process is shown in FIG. As shown in FIG. 6, in the step of injecting the adhesive 101, the outer tube side connection portion 410 of the connection portion 404 is the opening portion 501 of the outer tube 500 so that the convex portion 502 of the outer tube 500 is positioned in the groove portion 415. In a state where the other end 503 side of the outer tube 500 is fixed substantially downward in the vertical direction while being inserted into the inside, an adhesive is injected between the base 400 and the outer tube 500 from the opening 403 of the base 400. . After the injected adhesive hits the wall 415 c serving as a guide, the adhesive is separated from the convex portion 502 in the direction of the tube axis X ₅₀₀ of the outer tube 500 as it approaches the convex portion 502 of the outer tube 500 in the circumferential direction of the connecting portion 404. The protruding wall 502 is guided to the other end 503 side in the tube axis X ₅₀₀ direction of the outer tube 500 by the wall 415c that is provided so as to avoid the protruding portion 502 of the outer tube 500. Accordingly, the adhesive 101 can be disposed between the connecting portion 404 and the outer tube 500 and on the other end 503 side in the tube axis X ₅₀₀ direction of the outer tube 500 with respect to the convex portion 502.

1 and 2 to 5, the case where the guide is the wall 415 c of the groove portion 415 has been described. However, the guide is not limited thereto, and at least a part of the connection portion 404 is inserted into the opening portion 501 of the outer tube 500. In such a state, it is sufficient that the adhesive 101 is guided to the distal end side in the tube axis X ₅₀₀ direction of the outer tube 500 so as to avoid the convex portion 502 of the outer tube 500.

Further, when viewed from a direction substantially perpendicular to the tube axis of the outer tube 500 (as viewed from the direction of the paper surface of FIG. 2A and FIG. 5), the convex portion of the outer tube 500 and the groove portion 415 It is preferable that the shortest distance M [mm] in the range where the adhesive is disposed between the wall 415c is in the range of 1 [mm] to 10 [mm]. More preferably, it is in the range of 2 [mm] or more and 8 [mm] or less. In this case, it is possible to easily dispose the adhesive on the distal end side of the outer tube 500 in the tube axis _X500 direction.

  Moreover, the convex part 502 of the outer tube | pipe 500 may be fixed to the connection part 404 with the adhesive agent in the state located in the horizontal groove part 415b. In this case, when the lamp is used with the base of the lamp 100 in the vertical direction, even if the adhesive is detached due to deterioration or the like, the convex portion 502 of the outer tube 500 is locked to the lateral groove portion 415b and It is possible to more reliably prevent the tube 500 from falling.

In addition, in the direction of the tube axis X ₅₀₀ of the outer tube 500, the overlapping length L between the outer tube 500 and the outer tube side connecting portion 410 is preferably in the range of 3 [mm] to 10 [mm]. In this case, the inclination of the tube axis X ₅₀₀ of the outer tube 500 can be sufficiently suppressed by the outer tube side connecting portion 410 while suppressing the light blocking by the outer tube side connecting portion 410. Furthermore, L is more preferably in the range of 5 [mm] to 8 [mm].

Moreover, it is preferable that the length M of the outer tube | pipe 500 in the pipe | tube axis | shaft _X500 direction in the nozzle | cap | die 400 exists in the range of 35 [mm] or more and 51 [mm] or less. In this case, the entire lamp 100 can be made compact by keeping the range of the base 400, which is a non-light emitting portion, within a predetermined range. Further, M is more preferably in the range of 37 [mm] to 47 [mm].

  A plan view of the base 400 is shown in FIG. On the paper surface of FIG. 7 (when viewed from the tube axis direction of the outer tube), the curvature radius R of the corner portion of the groove portion 415 is in the range of 0.1 [mm] or more and 1.5 [mm] or less. Also good. In this case, the convex portion 502 of the outer tube 500 can be easily inserted into the groove portion 415. Furthermore, the radius of curvature R of the corner of the groove 415 may be in the range of 0.5 [mm] or more and 1.0 [mm] or less. In this case, the convex portion 502 of the outer tube 500 can be further easily inserted into the groove portion 415.

5. Other Configurations As shown in FIG. 1, a spacer 102 may be provided at the distal end portion 302 of the inner tube 300. The spacer 102 includes an annular portion 103 pivotally supported by a tip-off portion 310 protruding from the center of the distal end portion 302 of the inner tube 300, and 4 [books] having spring elasticity formed so as to radially diverge from the annular portion 103. The inner tube 300 is elastically deformed so that the band-like portion 104 is pressed by the inner peripheral portion of the outer tube 500 on the closing portion 503 side and is inwardly squeezed. Is bent into a concentric shape.

  The spacer 102 is formed of a stainless steel strip for spring having a thickness of 0.2 [mm], and a circular hole is formed in the central plate portion of the spacer 102 through which the exhaust pipe protruding from the center of the tip of the inner pipe is inserted. In addition, a plurality of claw pieces to be brought into contact with the outer peripheral portion of the tip-off portion 310 are formed along the periphery of the circular hole, and an annular rib having an arc-shaped cross section is formed concentrically with the circular hole. The strength of the center plate is reinforced.

  The annular portion 103 has, for example, a circular ring shape that is pivotally supported by a tip-off portion 310 that protrudes to the center of the distal end portion 302 of the inner tube 300.

  As shown in FIG. 1, a claw piece 105 may be formed inside the annular portion 103. In this case, the spacer 102 can be prevented from being detached from the inner tube 300 by making the annular portion 103 difficult to be detached from the tip-off portion 310. Furthermore, the tip-off part 310 of the inner tube 300 may have an enlarged diameter at the tip. In this case, the claw piece 105 is caught by the tip end portion of the tip-off portion 310, so that the annular portion 103 is not easily detached from the tip-off portion 310, and the spacer 102 can be hardly detached from the inner tube 300.

  The band-like portion 104 has, for example, spring elasticity, and is formed so as to branch radially from the annular portion 103 at intervals of 90 [°]. A hemispherical convex surface portion 106 may be formed at the tip of the belt-like portion 104. In this case, the contact resistance between the spacer 102 and the outer tube 500 can be reduced.

  The width of the belt-like portion 104 is preferably in the range of 0.5 [mm] or more and 3 [mm] or less. In this case, when the outer tube 500 is put on the inner tube 300 after the spacer 102 is attached to the inner tube, the inner tube 300 is elastically pressed against the inner peripheral portion of the outer tube 500 and squeezed inward without applying a strong force. Deformation can be performed smoothly.

  In addition, the strip | belt-shaped part 104 should just be provided not only 4 [book] but 2 [book] or more. Furthermore, it is preferable that the intervals between the strips 104 are substantially equal. In this case, the stability of the spacer 102 can be improved.

As described above, according to the configuration of the high-pressure discharge lamp 100 according to the first embodiment of the present invention, the other end 503 side with respect to the convex portion 502 of the outer tube 500 in the tube axis X ₅₀₀ direction of the outer tube 500. It is possible to easily dispose the adhesive 101 and prevent the outer tube 500 from coming off the base 400 more reliably.

(Second Embodiment)
An exploded perspective view of a high pressure discharge lamp according to the second embodiment of the present invention is shown in FIG. 8, a front view thereof is shown in FIG. 9 (a), and a right side view thereof is shown in FIG. 9 (b). The high pressure discharge lamp (hereinafter referred to as “lamp 600”) according to the second embodiment of the present invention is substantially the same as the lamp 100 except for the configuration of the connection portion 417 of the base 416 and the convex portion 507 of the outer tube 506. Have the same structure. Therefore, the connection part 417 of the base 416 and the convex part 507 of the outer tube 506 will be described in detail, and description of other points will be omitted.

  The outer tube 506 has an opening 501 at one end and a convex portion 507 protruding at least one outside, and a closing portion 503 at the other end. That is, the convex portion 507 has substantially the same configuration as that of the outer tube 500 except that the convex portion 507 protrudes inward from the outer side of the outer tube 506. In the present invention, the “protruding portion protruding outward” is not limited to the one protruding locally outward as shown in FIG. 9B, but the one protruding smoothly outward, etc. The outer peripheral surface of the opening part 501 of the pipe | tube 506 should just have the part which has deform | transformed outside to some extent.

On the inner surface of the connecting portion 417, a guide for guiding the adhesive 101 for bonding the connecting portion 417 and the outer tube 506 from the opening to the convex portion 507 toward the other end portion 503 side in the tube axis _X506 direction of the outer tube 506. The adhesive 101 is disposed between the connection portion 417 and the outer tube 506 and on the other end portion 503 side in the tube axis X ₅₀₆ direction of the outer tube 506 with respect to the convex portion 507. .

  A perspective view of the base 416 is shown in FIG. The connecting portion 417 of the base 416 has substantially the same configuration as the connecting portion 404 except for the configuration of the outer tube side connecting portion 410.

  The connection portion 417 has a peripheral wall portion 419 so as to cover the outer side of the flange portion 412 with respect to the outer tube side connection portion 418, and the groove portion 420 is formed on the inner surface of the peripheral wall portion 419. Is different.

A perspective view of the peripheral wall portion 419 of the base 416 is shown in FIG. As shown in FIG. 11, a groove portion 420 is provided on the inner surface of the peripheral wall portion 419, and the groove portion 420 includes a longitudinal groove portion 420 a along the tube axis X ₅₀₆ direction of the outer tube 506, and a circumferential direction of the connecting portion from the longitudinal groove portion 420 a. And a lateral groove 420b extending in the direction. In this embodiment, the guide is the wall 420c on the side of the other end 503 in the tube axis _X506 direction of the outer tube 506 in the lateral groove 420b.

  In addition, the convex part 507 of the outer tube 506 may be fixed to the connection part 417 with an adhesive in a state where the convex part 507 is located in the lateral groove part 420b. In this case, when the lamp is used with the base of the lamp 100 facing upward, even if the adhesive is detached due to deterioration or the like, the convex portion 507 of the outer tube 506 is locked to the lateral groove 420b, and the outer tube 506 is It can prevent more reliably that it falls.

As described above, according to the configuration of the high-pressure discharge lamp 600 according to the second embodiment of the present invention, in the direction of the tube axis X ₅₀₆ of the outer tube 506, the other end 503 side with respect to the convex portion 507 of the outer tube 506. It is possible to easily dispose the adhesive 101 and to prevent the outer tube 506 from coming off the base 416 more reliably.

(Third embodiment)
FIG. 12 shows a partially cutaway front view of a lighting apparatus according to the third embodiment of the present invention. An illumination device according to a third embodiment of the present invention (hereinafter referred to as “illumination device 700”) includes a high-pressure discharge lamp and a lighting fixture 701 to which the high-pressure discharge lamp is attached.

  For example, the lamp 100 can be used as the high pressure discharge lamp. In addition, you may use not only the lamp | ramp 100 but the lamp | ramp 200 and the modification mentioned later.

  The luminaire 701 includes a reflection plate 704 that reflects light emitted from the lamp 100 disposed therein, a socket (not shown) that is incorporated in the reflection plate 704 and to which the lamp 100 is attached. An attachment (not shown) for attaching the reflector 704 to the wall or ceiling is provided.

  As shown in FIG. 12, the reflection plate 704 includes a concave reflection surface 703. The reflecting surface 703 is configured by using, for example, an aluminum mirror. The reflection plate 704 is a so-called (front) open type in which the opening (light extraction port) 705 is not blocked by a glass plate or the like.

  The socket is electrically connected to the base of the lamp 100 and supplies power to the lamp 100. A ballast (not shown) for lighting the lamp 100 is embedded in the ceiling, for example, and supplies power to the lamp 100 via the supply line 706.

  The attachment tool has, for example, a “U” shape, and includes a pair of arms 707 arranged in parallel and a connecting portion (not shown) that connects one ends of the pair of arms 707. The reflecting plate 704 is pivotally supported by the arm 707 in a state where the reflecting plate 704 is sandwiched between the pair of arms 707, and the connecting portion is attached to, for example, a wall or a ceiling. Note that the direction of light emitted from the lighting device 700 can be adjusted by rotating an attachment that can rotate with respect to the reflector 704.

  As described above, according to the configuration of the lighting device 700 according to the third embodiment of the present invention, the high pressure discharge lamp that facilitates more reliably preventing the outer tubes 500 and 506 from coming off the bases 400 and 416 is provided. Thus, reliability can be improved.

(Modification)
As described above, the present invention has been described based on the specific examples shown in the above-described embodiments. However, the content of the present invention is not limited to the specific examples shown in the respective embodiments, and various high-pressure discharge lamps and It can be applied to a lighting device.

1. 1. About the base 1-1. Modification 1 of the base
FIG. 13 shows a perspective view of Modification 1 of the base of the high-pressure discharge lamp according to the first embodiment of the present invention. A high pressure discharge lamp base modification 1 according to the first embodiment of the present invention (hereinafter referred to as a “base 421”) has substantially the same configuration as the base 400 except for the configuration of the wall 422c of the groove 422. Have Therefore, the wall 422c of the groove part 422 will be described in detail, and description of other points will be omitted.

Walls 422c of the groove 422, as it approaches the protrusion 502 of the outer tube 500 in the circumferential direction of the connecting portion 404 is spaced from the protrusion 502 in the tube axis X ₅₀₀ direction stepwise outer tube 500. Specifically, the wall 422c is gradually separated from the opening 403 toward the vertical groove portion 415a.

  In this case, since the wall 422c is stepped in steps, after the adhesive is injected and hardened, the portion where the adhesive is caught can be increased, and the adhesive force between the adhesive and the base 421 can be increased. Can be increased.

The wall 422c shown in FIG. 13 is separated from the convex portion 502 in the direction of the tube axis X ₅₀₀ of the outer tube 500 in two stages. However, the wall 422c is not limited to two stages but has multiple stages such as three stages and four stages. There may be.

1-2. Modification 2 of the base
FIG. 14 shows a perspective view of Modification 2 of the base of the high-pressure discharge lamp according to the first embodiment of the present invention. A high pressure discharge lamp base modification 2 according to the first embodiment of the present invention (hereinafter referred to as “base 423”) has substantially the same configuration as the base 400 except for the configuration of the wall 424c of the groove 424. Have Therefore, the wall 424c of the groove portion 424 will be described in detail, and description of other points will be omitted.

Walls 424c of the groove 424, in the tube axis X ₅₀₀ direction of the outer tube 500, the flange portion 412 to the edge opposite to the body portion 402 of the connecting portion 404, the convex outer tube 500 in the circumferential direction of the connection portion 404 As the portion 502 is approached, the outer tube 500 is separated from the convex portion 502 in the tube axis _X500 direction. Specifically, the wall 424c is separated from the opening 403 toward the longitudinal groove portion 415a from the flange portion 412 to the edge of the connection portion 404 on the side opposite to the main body portion 402.

  In this case, the groove portion 424 can be easily processed by making the structure of the groove portion 424 simpler.

1-3. Base modification 3
FIG. 15 shows a perspective view of Modification 3 of the base of the high-pressure discharge lamp according to the first embodiment of the present invention. The high pressure discharge lamp base modification 3 according to the first embodiment of the present invention (hereinafter referred to as “base 425”) has substantially the same configuration as the base 423 except for the configuration of the wall 426c of the groove 426. Have Therefore, the wall 426c of the groove portion 426 will be described in detail, and description of other points will be omitted.

  The wall 426c of the groove portion 426 has an arc shape that swells toward the vertical groove portion 415a. In this case, the adhesive 101 can easily flow along the curved surface of the wall 426c to the side opposite to the main body portion 401 of the vertical groove portion 415a.

  The wall 426c of the groove 426 shown in FIG. 15 has a shape that swells toward the longitudinal groove 415a with respect to the wall 424c of the groove 424 of the base 423. A similar structure can be adopted.

1-4. Modification 4 of the base
A perspective view of Modification 4 of the base of the high-pressure discharge lamp according to the first embodiment of the present invention is shown in FIG. A sixth modification (hereinafter referred to as “base 427”) of the base of the high-pressure discharge lamp according to the first embodiment of the present invention has substantially the same configuration as the base 423 except for the configuration of the wall 428c of the groove 428. Have Therefore, the wall 428c of the groove portion 428 will be described in detail, and description of other points will be omitted.

  The wall 428c of the groove portion 428 has an arc shape that is recessed with respect to the longitudinal groove 415a side. In this case, more adhesive agent 101 can be filled in the lateral groove portion 415b, and the adhesive force between the base 400 and the outer tube 500 can be improved.

  The wall 428c of the groove 428 shown in FIG. 16 has a shape that swells toward the vertical groove 415a with respect to the wall 424c of the groove 424 of the base 423. A similar structure can be adopted.

1-5. Modified example 5 of the base
FIG. 17 shows a perspective view of Modification 5 of the base of the high-pressure discharge lamp according to the first embodiment of the present invention. A modified example 5 (hereinafter referred to as “cap 429”) of the base of the high-pressure discharge lamp according to the first embodiment of the present invention is substantially the same as the base 423 except for the configuration of the lateral groove 430b and the wall 430c of the groove 430. Have the same structure. Therefore, the lateral groove portion 430b and the wall 430c of the groove portion 430 will be described in detail, and description of other points will be omitted.

  Two lateral groove portions 430b of the groove portion 430 are provided so as to extend on both sides in the circumferential direction of the vertical groove portion 415a. Accordingly, the walls 430c are also provided on both sides of the longitudinal groove portion 415a. In this case, when a plurality of walls 430c serving as guides are provided, when the adhesive is injected from the opening 403, the degree of freedom in selecting the injection position can be increased.

1-6. Modification 6 of the base
FIG. 18 shows a perspective view of Modification 6 of the base of the high-pressure discharge lamp according to the first embodiment of the present invention. A high pressure discharge lamp base modification 6 according to the first embodiment of the present invention (hereinafter referred to as “base 431”) is substantially the same as the base 423 except for the configuration of the longitudinal groove 432a of the groove 432. It has a configuration. Therefore, the vertical groove part 432a of the groove part 432 will be described in detail, and description of other points will be omitted.

Vertical groove 432a of the groove 432, in the tube axis X ₅₀₀ direction of the outer tube 500, not through the body portion 402 of the connecting portion 404 to the opposite edge, having a Tatemizokabe portion 432 d. In this case, it is possible to prevent the adhesive 101 injected from the opening 403 from protruding from the edge of the connection portion 404 opposite to the main body portion 402 through the vertical groove portion 432a, thereby improving the aesthetic appearance of the lamp.

  In this case, in order for the outer tube side connection portion 410 of the connection portion 404 to be inserted into the opening portion 501 of the outer tube 500, the opening portion 501 of the outer tube 500 including the portion where the convex portion 502 is formed. It is necessary to adjust the dimensions such as making the minimum inner diameter larger than the outer diameter of the outer tube side connecting portion 410.

1-7. Base Modification 7
FIG. 19 shows a perspective view of Modification 7 of the base of the high-pressure discharge lamp according to the first embodiment of the present invention. A high pressure discharge lamp base modification 7 according to the first embodiment of the present invention (hereinafter referred to as “base 433”) is substantially the same as the base 404 except for the configuration of the longitudinal groove 434a of the groove 434. It has a configuration. Therefore, the vertical groove part 434a of the groove part 434 will be described in detail, and description of other points will be omitted.

  The vertical groove portion 434a of the groove portion 434 has a structure in which there is no wall on the opposite side of the horizontal groove portion 415b and is cut out. That is, in a state where the outer tube side connection portion 410 of the connection portion 404 is inserted into the opening 501 of the outer tube 500, there is no wall on the opposite side to the lateral groove portion 415b of the vertical groove portion 434a, and the cut portion is Adhesive can be injected. That is, the groove 434 and the inner surface of the outer tube 500 can be used as a guide in the notched portion.

  In this case, since the walls of the groove 434 are reduced, the corners can be reduced, and the corners can be prevented from being chipped when the lamp is assembled.

Incidentally, lateral groove 415b shown in FIG. 19, in the tube axis X ₅₀₀ direction of the outer tube 500, but the opposite side of the wall and the body portion 402 are substantially parallel to the circumferential direction of the connection portion 404 is not limited thereto Various structures can be employed.

1-8. About the Guide In the above-described embodiments and modifications, one of the walls of the grooves 415, 420, 422, 424, 426, 428, 430, and 432 of the bases 400, 416, 421, 423, 425, 427, 429, and 431 is provided. However, the present invention is not limited to this, and a guide may be provided by providing a wall protruding on the outer surface of the connection portion 404 of the base 400, 416, 421, 423, 425, 427, 429, 431. .

1-9. About connection part and main body part In each above-mentioned embodiment and modification, mouthpieces 400, 416, 421, 423, 425, 427, 429, 431, 433 are formed by combining main body part 402 and connection parts 404, 417. However, the main body portion 402 and the connection portions 404 and 417 may be integrally formed, such as integral molding, or may be a combination of three or more parts.

2. Other configurations 2-1. Concerning the convex portions In the embodiments and the modified examples, the convex portions 502 and 507 of the outer tubes 500 and 506 are provided in the circumferential direction of the outer tubes 500 and 506 at two intervals of about 180 [°]. However, the present invention is not limited to this, and at least one of the convex portions 502 and 507 may be provided at the opening of the outer tube 500 or 506.

  Further, in the case where a plurality of convex portions 502 and 507 are provided, the interval can be freely selected. For example, when two convex portions 502 and 507 are provided, the closest interval between the convex portions 502 and 507 is 45 [°] or more and 180 [°] in the circumferential direction of the outer tube 500 or 506. It is preferable that they are provided with an interval within the following range. In this case, the convex portions 502 and 507 are not too close to each other, and the convex portions 502 and 507 can be easily formed.

2-2. About groove part and opening In each embodiment and modification, groove part 415,420,422,424,426,428,430,432,434 of base 400,416,421,423,425,427,429,431,433 The number of the openings 403 corresponding to the protrusions 502 and 507 of the outer tubes 500 and 506 is provided. Specifically, the two openings 403 are described in the base, but the present invention is not limited thereto. The groove portions 415, 420, 422, 424, 426, 428, 430, 432, 434 and the opening 403 are not limited to the number corresponding to the number of the convex portions 502, 507, but one groove portion 415, 420, 422, 424, 426. , 428, 430, 432, 434 and the opening 403, two or more convex portions 502, 507 may correspond to each other.

2-3. Regarding Numerical Ranges In each of the above-described embodiments and modifications, the symbol “˜” indicating a numerical range includes numerical values at both ends thereof.

  The present invention can be widely applied to high-pressure discharge lamps and lighting devices.

100, 600 High-pressure discharge lamp 101 Adhesive 200 Discharge tube 300 Inner tube 400, 416, 421, 423, 425, 427, 429, 431, 433 Base 401 Feed terminal 402 Main body 403 Opening 404, 417 Connection 500 Outer tube 501 Opening 502 Projection 503 Closure (other end)
700 Lighting device

Claims (4)

An inner tube in which a discharge tube is arranged is a high-pressure discharge lamp accommodated in a space surrounded by a base and an outer tube,
The outer tube has an opening at one end and a projecting portion protruding at least one inside, and a closing portion at the other end,
The base has a main body portion having a power supply terminal, and a connection portion at least a part of which is housed in the opening of the outer tube, and an opening is provided on the power supply terminal side,
A guide is provided on the outer surface of the connection portion to guide the adhesive that bonds the connection portion and the outer tube from the opening to the other end in the tube axis direction of the outer tube with respect to the convex portion. And
The high-pressure discharge lamp characterized in that the adhesive is disposed between the connecting portion and the outer tube and on the other end portion side in the tube axis direction of the outer tube with respect to the convex portion. . An inner tube in which a discharge tube is arranged is a high-pressure discharge lamp accommodated in a space surrounded by a base and an outer tube,
The outer tube has an opening at one end and a convex portion protruding at least one outside, and a closing portion at the other end.
The base has a main body portion having a power supply terminal, and a connection portion in which an opening portion of the outer tube is accommodated in at least a part thereof and an opening is provided on the power supply terminal side,
On the inner surface of the connection portion, a guide is provided for guiding an adhesive for bonding the connection portion and the outer tube from the opening to the other end in the tube axis direction of the outer tube from the opening. And
The high-pressure discharge lamp, characterized in that the adhesive is disposed between the connecting portion and the outer tube, on the other end side in the tube axis direction of the outer tube with respect to the convex portion. 2. The high-pressure discharge lamp according to claim 1, wherein the guide has a portion that moves away from the convex portion in the tube axis direction as it approaches the convex portion in the circumferential direction of the connecting portion. An illuminating device comprising: the high-pressure discharge lamp according to any one of claims 1 to 3; and a lighting fixture to which the high-pressure discharge lamp is attached.

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