JP2012043588A - Metal vapor discharge lamp and luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metal vapor discharge lamp and a luminaire that hardly have an appearance defect due to a charging defect of an adhesive.SOLUTION: In the metal vapor discharge lamp 10, an inner tube 200 which has a pinch seal part 201 at one end side and in which a discharge tube 100 is arranged is housed in a space surrounded with a ferrule 400 and an outer tube 300, and the pinch seal part 201 of the inner tube 200 and the outer tube 300 are joined together with an adhesive 600. A collar member 500 having an outer peripheral shape along an inner peripheral surface shape of the outer tube 300 is fitted externally onto the pinch seal part 201, and the adhesive 600 is cured while dammed by the collar member 500 on the side of the ferrule 400 with respect to the collar member 500 in the outer tube 300.

Description

  The present invention relates to a metal vapor discharge lamp and an illuminating device, and more particularly to an adhesive filling technique for joining an inner tube and an outer tube in a metal halide lamp having a triple tube structure.

  Conventionally, there has been a metal halide lamp (hereinafter simply referred to as “lamp”) having a triple tube structure in which an inner tube having a discharge tube disposed therein is accommodated in a space surrounded by a base and an outer tube. In such a lamp, for example, the inner tube and the outer tube are joined by filling a gap between the inner tube and the outer tube with an adhesive such as cement. The adhesive can be filled, for example, by holding a temporarily assembled lamp so that the base is located on the lower side, inserting a nozzle of the filling machine into the base from a through hole provided in the base, and pinching the inner tube from the nozzle. This is performed by injecting an adhesive into the gap between the seal portion and the outer tube.

Japanese Patent No. 4436428

  However, since the adhesive has fluidity until it is solidified, the entirety of the adhesive does not always stay in the injected place, and a part of the adhesive hangs down due to gravity or the like, so that it is lower than the pinch seal part. It may protrude to the discharge tube side. Moreover, the adhesive may protrude beyond the pinch seal portion to the discharge tube side due to a control mistake when injecting with a nozzle. Such poor filling of the adhesive impairs the appearance of the lamp and lacks an aesthetic appearance suitable for use in a commercial facility such as a store. Therefore, in some cases, the lamp must be handled as a defective product. This is the cause of the decrease in yield.

  In view of the above-described problems, an object of the present invention is to provide a metal vapor discharge lamp and a lighting device that are less likely to cause poor appearance due to poor filling of an adhesive.

  In order to achieve the above object, a metal vapor discharge lamp according to the present invention has a space in which an inner tube having a pinch seal portion on one end side and a discharge tube disposed therein is surrounded by a base and an outer tube. It is a metal vapor discharge lamp that is accommodated and the pinch seal portion of the inner tube and the outer tube are joined by an adhesive, and the pinch seal portion has an outer peripheral shape along the inner peripheral surface shape of the outer tube And the adhesive is solidified in a state of being dammed by the hook-shaped member on the base side of the base-shaped member in the outer tube. To do.

  The illumination device according to the present invention includes the metal vapor discharge lamp and a reflecting mirror that reflects light emitted from the metal vapor discharge lamp in a desired direction.

  In the metal vapor discharge lamp and the lighting device according to the present invention, a hook-shaped member having an outer peripheral shape along the inner peripheral surface shape of the outer tube is externally fitted to the pinch seal portion, and the adhesive is dammed by the hook-shaped member. Since it is stopped, the adhesive does not protrude from the pinch seal portion to the discharge tube side. Accordingly, poor appearance due to poor filling of the adhesive hardly occurs.

The partially broken side view which shows the illuminating device which concerns on 1 aspect of this invention The partially broken side view which shows the metal vapor discharge lamp which concerns on 1 aspect of this invention Sectional drawing which shows the discharge tube of the metal vapor discharge lamp which concerns on 1 aspect of this invention The partially broken perspective view which shows the cross section along the AA in FIG. The perspective view which shows the bowl-shaped member which concerns on 1 aspect of this invention. Sectional drawing for demonstrating the metal vapor discharge lamp which concerns on the modification 1. Sectional drawing for demonstrating the metal vapor discharge lamp which concerns on the modification 2. Sectional drawing for demonstrating the metal vapor discharge lamp which concerns on the modification 3. Sectional drawing for demonstrating the metal vapor discharge lamp which concerns on the modification 4. Sectional drawing for demonstrating the metal vapor discharge lamp which concerns on the modification 5. Sectional drawing for demonstrating the metal vapor discharge lamp which concerns on the modification 6. Sectional drawing for demonstrating the metal vapor discharge lamp which concerns on the modification 7.

  Hereinafter, a metal vapor discharge lamp and a lighting device according to the present embodiment will be described with reference to the drawings. In addition, the scale of the member in each drawing differs from an actual thing. In the present invention, the sign “˜” indicating a numerical range includes numerical values at both ends.

[Lighting device]
FIG. 1 is a partially cutaway side view illustrating a lighting device according to one embodiment of the present invention. As shown in FIG. 1, an illuminating device 1 according to one embodiment of the present invention is a spotlight illuminating device, and includes a metal vapor discharge lamp 10 (hereinafter simply referred to as “lamp 10”) and the lamp 10 disposed therein. Lighting fixture 20 is provided. The illumination device according to the present invention is not limited to a spotlight illumination device, and may be illumination for other purposes.

The lamp 10 includes a discharge tube 100, an inner tube 200, an outer tube 300, a base 400 and a bowl-shaped member 500. Details of the lamp 10 will be described later.
The luminaire 20 includes a reflecting mirror 22 having a concave reflecting surface 21 that reflects light emitted from the lamp 10 forward, a lamp mounting socket 23 incorporated in the reflecting mirror 22, and a wall or ceiling. And an attachment 24 for attaching the reflecting mirror 22.

The reflecting mirror 22 is in an open state because the light extraction opening 25 provided on the front surface is not blocked by a cover such as a glass plate.
The socket 23 is electrically connected to a lighting device (not shown) embedded in a wall or ceiling via a supply line 26, and if the base 400 of the lamp 10 is inserted into the socket 23, the lamp 10 is connected to the lamp 10. Can be supplied with power.

  The attachment 24 has an arm 27 that is rotatably attached to a wall or ceiling, and a reflecting mirror 22 is pivotally attached to the tip of the arm 27. The direction of light emitted from the illumination device 1 can be adjusted by rotating the arm 27 or the reflecting mirror 22.

[Metal vapor discharge lamp]
FIG. 2 is a partially broken side view showing a metal vapor discharge lamp according to one embodiment of the present invention. As shown in FIG. 2, the lamp 10 is a metal halide lamp having a triple tube structure, and an inner tube 200 having a pinch seal portion 201 on one end side and having a discharge tube 100 disposed therein is connected to a base 400 and an outer tube. The pinch seal portion 201 of the inner pipe 200 and the outer pipe 300 are joined by an adhesive 600 and are accommodated in a space surrounded by the pipe 300.

  FIG. 3 is a cross-sectional view illustrating a discharge tube of a metal vapor discharge lamp according to an aspect of the present invention. As shown in FIG. 3, the discharge tube 100 includes a main tube portion 102 having a discharge space 101 hermetically sealed therein, and a tube axis (the center in the longitudinal direction of the lamp 10) of the discharge tube 100 from the main tube portion 102. The narrow tube portions 103 and 104 arranged so as to extend on both sides in the direction (which coincides with the lamp axis X, which is the shaft), and the joint portions 105 and 106 that fill the gap between the main tube portion 102 and the thin tube portions 103 and 104. And an envelope 107 composed of

  The envelope 107 is a shrink-fit type made of alumina ceramic, for example. The envelope 107 is not limited to the one formed of alumina ceramic, and may be formed of other translucent ceramic (for example, rare earth alumina garnet ceramic), quartz glass, or the like. In the drawing, the discharge tube 100 is a shrink-fit type formed by joining the main tube portion 102, the thin tube portions 103 and 104, and the joint portions 105 and 106, but the main tube portion 102, the thin tube portions 103 and 104, and An integrated type in which the joint portions 105 and 106 are integrally formed may be used. Further, the main pipe portion 102 may be formed by joining a plurality of members.

  The discharge space 101 is filled with a predetermined amount of a metal halide that is a luminescent material, a rare gas that is a starting auxiliary gas, and mercury that is a buffer gas. Examples of the metal halide include sodium iodide, dysprosium iodide, holmium iodide, thulium iodide, thallium iodide, cerium iodide, calcium iodide, lithium iodide, indium iodide, and scandium iodide. It is done. The metal halide is appropriately determined depending on the emission color.

  The discharge tube 100 has a pair of electrodes 108 and 109 whose distal ends are opposed to each other in the discharge space 101 of the main tube portion 102 and whose proximal ends are inserted into the narrow tube portions 103 and 104. An intermediate position between the tips of the electrodes 108 and 109 becomes the optical center O of the discharge tube 100 in FIG.

  The electrodes 108 and 109 have electrode rods 110 and 111 and electrode coils 112 and 113 provided at the tip portions (end portions on the side facing each other in the discharge space 101) of the electrode rods 110 and 111. The other end portions of the electrodes 108 and 109 are joined to one end portions of the power feeders 114 and 115 in the thin tube portions 103 and 104, and the power feeders 114 and 115 are formed from the frit poured into the thin tube portions 103 and 104. It is sealed by the sealing materials 116 and 117.

Returning to FIG. 2, the power feeders 114 and 115 are electrically connected to the base 400 via the power supply lines 118 and 119, the metal foils 120 and 121, and the introduction lines 122 and 123.
One power supply line 118 is covered with a sleeve 128 made of, for example, quartz glass at a portion facing the other power supply line 119 and the power supply body 115 connected to the power supply line 119. With such a configuration, even if a leak occurs in the discharge tube 100 at the end of the lamp life, there is an effect of suppressing an unexpected large current from continuing to flow due to a discharge generated between members having opposite polarities. As a result, it is possible to prevent problems such as damage to the lighting device.

  The lead wires 122 and 123 are, for example, a connection between the first external lead wires 124 and 125 made of molybdenum and the second external lead wires 126 and 127 made of nickel. The first external lead wires 124 and 125 are made of metal. The second external lead wires 126 and 127 are connected to the base 400 and connected to the foils 120 and 121. When a soft metal wire such as nickel is used for the second external lead wires 126 and 127, workability such as connection between the second external lead wires 126 and 127 and the base 400 and optical center alignment is improved. The materials of the first external lead wires 124 and 125 and the second external lead wires 126 and 127 are not limited to the above and are arbitrary.

  The inner tube 200 includes, for example, a pinch seal portion 201 that is an end portion on the base side, a tip portion 202 that is an end portion on the side opposite to the base 400, and an intermediate portion 203 between the pinch seal portion 201 and the tip portion 202. Is a single-sealed airtight container made of, for example, quartz glass. The inner tube 200 is not limited to the one formed of quartz glass, and may be formed of a light-transmitting ceramic such as alumina ceramic or hard glass.

  The pinch seal portion 201 is formed by, for example, crush sealing by a pinch seal method, and includes one end portions of the power supply lines 118 and 119, the entire metal foils 120 and 121, and one end portions of the first external lead wires 124 and 125. Portion (that is, one end portion of the introduction wires 122 and 123) is sealed.

  The tip portion 202 has a tip-off portion 204 that is the remaining portion of the exhaust pipe used when evacuating the inside of the inner pipe 200. By evacuating the inner tube 200, metal members such as the power feeders 114 and 115 and the power supply lines 118 and 119 can be prevented from being exposed to high temperatures and being oxidized. It should be noted that the metal member can be prevented from being oxidized by filling the inner tube 200 with an inert gas such as nitrogen instead of evacuating the inner tube 200.

  The intermediate portion 203 is, for example, a substantially cylindrical shape, and the envelope 107 of the discharge tube 100 is disposed therein. The shape of the intermediate portion 203 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 203 do not necessarily have to be uniform along the direction of the tube axis (corresponding to the lamp axis X) of the inner tube, and correspond to the main tube portion 102 of the discharge tube 100, for example. A shape in which the inner diameter and the outer diameter of the position are larger than the inner diameter and the outer diameter of the other positions, that is, a middle-bulged shape having a bulging portion in part. Thereby, it can suppress that the temperature of the discharge tube 100 rises excessively.

  The outer tube 300 includes, for example, an opening (neck portion) 301 that is a base side end, a closing portion 302 that is an end opposite to the base 400, and an intermediate between the opening 301 and the closing portion 302. It is a bottomed cylindrical shape comprised with the part 303, Comprising: For example, it forms with hard glass. The outer tube 300 is not limited to the one made of hard glass, and may be made of a translucent ceramic such as alumina ceramic, quartz glass, or the like.

  When the inner tube 200 is damaged due to the rupture of the discharge tube 100, the outer tube 300 plays a role of preventing the fragments generated by the rupture or damage from being scattered. Therefore, even if the opening 25 as shown in FIG. 1 is attached to a lighting fixture 20 that is not covered with a cover, the fragments do not scatter. Note that the inside of the outer tube 300 may be in an atmospheric state, may be in a reduced pressure state, or may be filled with an inert gas.

  The blocking portion 302 is preferably substantially hemispherical or flat. In order to ensure the compactness of the lamp 10 and the suitability to the lighting fixture 20, the intermediate portion 303 is preferably substantially the same cylindrical shape as the intermediate portion 203 of the inner tube 200, and the maximum outer diameter is 20 [mm]. It is preferable that the diameter is about 27 [mm], the neck diameter (the diameter near the pinch seal portion 201) is 20 [mm] to 23 [mm], and the wall thickness is 1 [mm] to 2 [mm]. Further, in the intermediate portion 303 of the outer tube 300, the gap between the inner peripheral surface 304 of the outer tube 300 and the outer peripheral surface 205 of the inner tube 200 is orthogonal to the tube axis of the outer tube 300 (matches the lamp axis X). It is preferably substantially uniform in the direction. In order to secure a gap when the outer pipe 300 is put on the inner pipe 200 in the assembly process, it is preferable that the gap is designed to be 1 [mm] to 3 [mm] on average.

  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 do not necessarily have to be uniform along the outer tube axis direction. For example, the inner diameter and the outer diameter at a position corresponding to the main tube portion 102 of the discharge tube 100 are other than that. A shape that is larger than the inner diameter and outer diameter of the position, that is, a middle-bulged shape having a bulged portion in part. By reducing the temperature rise of the outer tube due to the heat from the discharge tube by providing the bulging portion, it is possible to widen the selection range of the suitable lighting fixture 20 with a margin from the strain point of the hard glass. . Furthermore, the safety when the discharge tube is broken is also improved. In that case, it is preferable that the gap is designed to be 5 [mm] at the maximum. Further, the thickness of the intermediate portion of the outer tube is preferably 1 [mm] to 2 [mm].

  Furthermore, in order to prevent the outer tube 300 from falling, an inner convex portion may be provided in the vicinity of the opening 301, and a groove-shaped engaged portion may be provided in the base 400, for example. In that case, the case where it connects via connection members, such as cement, may be sufficient. Moreover, when the to-be-engaged part is not provided in the nozzle | cap | die 400, you may engage by covering the inner side convex part of the outer tube | pipe 300 with a connection member.

  The base 400 is an Edison type and has a shell portion 401 and an eyelet portion 402. One second external lead 126 passes through a through-hole 403 provided in the base 400, is led out to the outside, and is fixed to the base 400 by being joined to the shell portion 401. The other second external lead wire 127 is fixed to the base 400 by passing through a through hole 404 provided in the base 400 and joining to the eyelet part 402.

  The outer tube side end 405 of the base 400 is inserted into the opening 301 of the outer tube 300. With this configuration, the outer diameter of the lamp 10 can be made equal to or smaller than the maximum outer diameter of the base 400 in the base 400 portion, so that the opening diameter of the neck portion of the reflecting mirror 22 of the lighting fixture 20 is more than necessary. It is not necessary to increase the size, and the degree of design freedom for the reflecting mirror 22 can be increased.

  An annular bulging portion 407 along the circumferential direction is formed on the outer peripheral surface 406 of the base 400. The bulging portion 407 bulges in the direction orthogonal to the lamp axis X by the thickness of the opening 301 of the outer tube 300 from the outer peripheral surface 406, and the opening 301 of the outer tube 300 contacts the bulging portion 407. By doing so, the base 400 and the outer tube 300 can be easily positioned in the lamp axis X direction.

  In addition, there are two or more caps such as a part constituting a part necessary for electrical connection such as a shell part and an eyelet part, a part constituting a part for holding an outer pipe, and a part constituting a part for supporting an inner pipe. Even if it consists of these parts, these parts should just be fixed by adhesion or fitting with an adhesive agent etc.

FIG. 4 is a partially broken perspective view showing a cross section along the line AA in FIG. 2. As shown in FIG. 4, a hook-like member 500 is fitted on the pinch seal portion 201 of the inner tube 200.
Since the opening 301 of the outer pipe 300 is circumscribed with respect to the base 400, the adhesive is used without using a special jig during the process of filling the gap between the inner pipe and the outer pipe with an adhesive such as cement. The filling condition can be confirmed from the outside.

  An adhesive 600 is filled on the base side of the bowl-shaped member 500, and for example, the base-side main surface 501 of the bowl-shaped member 500 is hidden from the outside of the lamp 10 by the adhesive 600. On the other hand, the adhesive tube 600 is not filled on the discharge tube side of the bowl-shaped member 500, and the discharge tube side main surface 502 of the bowl-shaped member 500 is visible from the outside of the lamp 10 (see FIG. 2). The mode of the base side main surface 501 that is not visible from the outside is arbitrary, but the discharge side main surface 502 that is visible from the outside is preferably a flat surface in order to improve the appearance of the lamp 10. Note that the thickness of the bowl-shaped member 500 is not necessarily uniform and may be non-uniform. For example, only the discharge tube side main surface 502 visible from the outside may be a flat surface and the base side main surface 501 may not be a flat surface. Furthermore, the hook-shaped member 500 is not limited to a substantially plate shape, and may have another shape such as a film shape or a block shape.

  FIG. 5 is a perspective view showing a hook-shaped member according to one embodiment of the present invention. As shown in FIG. 5, a hole 503 that matches the shape of the pinch seal portion 201 is formed in the approximate center of the bowl-shaped member 500. The shape of the hole 503 is substantially the same as the shape of the cross section when the pinch seal portion 201 is cut along a plane orthogonal to the lamp axis X, and the hook-shaped member 500 is externally fitted to the pinch seal portion 201. Thus, the inner peripheral surface 504 of the hole portion 503 and the surface 206 of the pinch seal portion 201 are in contact with each other over substantially the entire circumference of the inner peripheral surface 504.

  Note that the hole 503 of the bowl-shaped member 500 does not necessarily have the same shape as the pinch seal portion 201, and may have a shape different from the cross section of the pinch seal portion 201 as long as it is within a certain range. .

  For example, the shape of the hole portion 503 may be smaller than the cross section of the pinch seal portion 201 in whole or in part. In that case, if the hook-shaped member 500 is formed of a plastically or elastically deformable material, preferably a material having further heat resistance, the pinch seal portion 201 can be externally fitted. With such a configuration, since the pinch seal portion 201 is press-fitted into the hole portion 503, the hook-shaped member 500 is not easily displaced with respect to the pinch seal portion 201. Further, since the inner peripheral surface 504 of the hole 503 and the surface 206 of the pinch seal portion 201 are more closely attached, a gap that allows the adhesive 600 to leak is formed between the flange-like member 500 and the pinch seal portion 201. Not likely to occur.

  Further, for example, the shape of the hole 503 may be a shape that is slightly larger than the cross section of the pinch seal portion 201 in whole or in part. In that case, a part of the inner peripheral surface 504 of the hole 503 is not in contact with the surface 206 of the pinch seal portion 201, or the inner peripheral surface 504 of the hole 503 is not at all with the surface 206 of the pinch seal portion 201. It can be the structure which is not contacting. In the case of a configuration in which a part of the inner peripheral surface 504 is not in contact, the hook-shaped member 500 may be held by the pinch seal portion 201 in the contacted portion. However, the gap generated in the non-contact portion is preferably a narrow width that prevents the adhesive 600 from leaking, and the maximum width of the gap is preferably 1.0 [mm] or less. On the other hand, when the hook-shaped member 500 and the pinch seal portion 201 are not in contact with each other, it is conceivable to fix the hook-shaped member 500 to the pinch seal portion 201 with an adhesive or the like. The adhesive in that case may be an adhesive 600 that joins the pinch seal part 201 and the outer tube 300.

  Next, the flange-shaped member 500 has an outer peripheral shape that follows the shape of the inner peripheral surface 304 of the outer tube 300, and the outer diameter of the flange-shaped member 500 and the inner diameter of the outer tube 300 are substantially the same. In a state where the inner tube 200 is housed in the outer tube 300, the outer peripheral surface 604 of the bowl-shaped member 500 and the inner peripheral surface 304 of the outer tube 300 are in contact with each other over substantially the entire periphery of the outer peripheral surface 604.

Note that the outer diameter of the bowl-shaped member 500 is not necessarily the same as the inner diameter of the outer tube 300, and may be different from the inner diameter of the outer tube 300 as long as it is within a certain range.
For example, the outer diameter of the bowl-shaped member 500 may be larger than the inner diameter of the outer tube 300. If the hook-shaped member 500 is formed of a plastically or elastically deformable material, preferably a heat-resistant material, the hook-shaped member 500 can be disposed in the outer tube 300. In that case, since the hook-shaped member 500 is press-fitted into the outer tube 300, the outer peripheral surface 604 of the hook-shaped member 500 and the inner peripheral surface 304 of the outer tube 300 can be brought into close contact with each other. It is difficult for a gap such that the adhesive 600 leaks between the outer tube 300 and the outer tube 300.

  Further, for example, the outer diameter of the bowl-shaped member 500 may be smaller than the inner diameter of the outer tube 300 and the outer peripheral surface 604 may not be in contact with the inner peripheral surface 304 of the outer tube 300 over the entire circumference. In this case, the gap generated between the outer peripheral surface 604 and the outer tube 300 is preferably a width that prevents the adhesive 600 from leaking, and the maximum width of the gap is preferably 1.0 [mm] or less.

  Furthermore, when the bowl-shaped member 500 is not a substantially circular plate shape, for example, a polygonal plate shape, only a part of the outer circumferential surface 604 of the bowl-shaped member 500 is in contact with the inner circumferential surface 304 of the outer tube 300. It can be a configuration. In that case, the gap formed between the outer peripheral surface 604 and the outer tube 300 is preferably a width that prevents the adhesive 600 from leaking, and the maximum width of the gap is preferably 1.5 [mm] or less. .

  The bowl-shaped member 500 preferably has a lower hardness than the outer tube 300 and the inner tube 200 in order not to damage the outer tube 300 and the inner tube 200. Moreover, since the pinch seal part 201 becomes high temperature when the lamp 10 is turned on, the heat resistant temperature of the bowl-shaped member 500 is 150 [° C.] or higher, more preferably 200 [° C.] or higher, and further preferably 250 [° C.] or higher. It is preferable. Further, if the material of the hook-shaped member 500 is plastic or elastic and can be deformed, it can be press-fitted even if the outer diameter of the hook-shaped member 500 is larger than the inner diameter of the outer tube 300. From the viewpoints of hardness, heat-resistant temperature, and deformability, the material of the bowl-shaped member 500 is preferably a metal such as aluminum or stainless steel, or a mineral such as mica or glass. Further, the hook-shaped member is not necessarily plate-shaped, and may be, for example, a metal or glass fiber having a fine mesh as long as the adhesive 600 is difficult to leak.

  The bowl-shaped member 500 not only plays the above-described role, but also regulates the attitude of the outer tube 300 with respect to the inner tube 200 and serves as a member for matching the tube axis of the inner tube 200 and the tube axis of the outer tube 300. Is available. In that case, it is preferable that the hook-shaped member 500 is in contact with the pinch seal portion 201 and the outer tube 300.

  The pinch seal portion 201 of the inner tube 200 and the outer tube 300 are joined together by an adhesive 600 disposed on the base side of the collar member 500. Further, the outer tube 300 and the base 400 are also joined by an adhesive 600. Further, it is more preferable that the pinch seal portion 201 and the base 400 are also joined by the adhesive 600 because the holding strength of each member constituting the lamp 10 is increased and the impact resistance such as dropping is increased.

  In addition, as the adhesive 600, cement etc. can be considered. The adhesive 600 only needs to join at least the pinch seal portion 201 and the outer tube 300, and the outer tube 300 and the base 400, and the pinch seal portion 201 and the base 400 are different adhesives or metal members. The inner pipe 200 may be supported only by the lead wires 126 and 127 extending from the pinch seal portion 201 without a joining member.

  The adhesive 600 is filled on the base side of the bowl-shaped member 500. The adhesive 600 is filled by holding the temporarily assembled lamp 10 so that the base 400 is positioned on the upper side, and inserting a nozzle (not shown) of the filling machine into the base 400 from the through hole 403 of the base 400. The adhesive 600 is injected into the gap between the pinch seal portion 201 of the inner tube 200 and the outer tube 300.

  The adhesive 600 is dammed by the hook-like member 500 so as to hang downward, that is, to flow to the discharge tube side in a state of having fluidity before solidifying. Therefore, the adhesive 600 is solidified in a state where it is blocked by the hook-shaped member 500 on the base side of the hook-shaped member 500 in the outer tube 300.

  Since the adhesive 600 is blocked by the hook-shaped member 500, it does not flow to the discharge tube 100 side beyond the pinch seal portion 201, and the lamp 10 has a good appearance. Further, since the adhesive 600 has a height level in the lamp axis X direction on the discharge tube 100 side by the hook-shaped member 500, the appearance of the lamp 10 is good.

  In this embodiment, since there is no gap between the hook-shaped member 500 and the adhesive 600 (because the base-side main surface 501 of the hook-shaped member 500 is in contact with the adhesive 600), the appearance of the lamp 10 However, a gap may exist between the hook-shaped member 500 and the adhesive 600 over the entire base-side main surface 501 of the hook-shaped member 500 or only in part.

  In the present embodiment, the adhesive 600 does not leak to the discharge tube 100 side at all from the flange-like member 500, so the appearance of the lamp 10 is more suitable. However, as long as there is no problem in appearance. It may be leaking.

[Modification]
As described above, the metal vapor discharge lamp and the lighting device according to the present invention have been specifically described based on the embodiments. However, the metal vapor discharge lamp and the lighting device according to the present invention are not limited to the above embodiments. Needless to say.

  In the following, modifications will be described, but basically only differences from the lamp 10 according to the above embodiment will be described, and description of the same points as the lamp 10 will be omitted. The same members as those of the lamp 10 are denoted by the same reference numerals.

  FIG. 6 is a cross-sectional view for explaining a metal vapor discharge lamp according to the first modification. As shown in FIG. 6, the base 400 may have a structure in which the bulging portion 407 (see FIG. 2) according to the above embodiment is not formed. In that case, the shape of the base 400 can be simplified.

  FIG. 7 is a cross-sectional view for explaining a metal vapor discharge lamp according to the second modification. As shown in FIG. 7, the outer tube side end 405 of the base 400 may not be inserted into the opening 301 of the outer tube 300. In that case, for example, the outer tube 300 and the base 400 are bonded with the adhesive 600 in a state where the end surface 305 on the opening 301 side of the outer tube 300 is in contact with the end surface 408 of the outer tube side end 405 of the base 400. It is good also as a structure adhered. If the end surface 305 on the opening 301 side of the outer tube 300 is brought into contact with the end surface 408 of the outer tube side end 405 of the base 400, positioning of the outer tube 300 with respect to the base 400 in the lamp axis X direction is unnecessary. .

  FIG. 8 is a cross-sectional view for explaining a metal vapor discharge lamp according to Modification 3. As shown in FIG. 8, the base 410 is not limited to the Edison type, and may be, for example, a swan type. The base 410 has a bottomed cylindrical main body 411 and a pair of two-stage pins 412 and 413 implanted in the main body 411. In this modification, the introduction wires 122 and 123 are constituted only by molybdenum external lead wires 124 and 125, and one end portion of the introduction wires 122 and 123 is formed in the sealing portion 201 of the inner tube 200 with the metal foil 120, 121 is joined. On the other hand, the other end portions of the lead-in wires 122 and 123 pass through the main body portion 411 and are inserted into the two-stage pins 412 and 413, and are electrically and mechanically connected to the two-stage pins 412 and 413 at the caulking portions 414 and 415. Connected.

  Further, in this modification, the base 410 and the outer tube 300 are joined by the fastening member 700 instead of the adhesive 600. The fastening member 700 has, for example, a short cylindrical shape, and the opening 301 and the outer tube are in contact with the outer tube side end 416 of the main body 411 of the base 410 on the opening 301 of the outer tube 300. It is externally fitted so as to cover the side end portion 416. Specifically, the diameter of the opening 301 of the outer pipe 300 is increased, and the outer pipe side edge 701 of the fastening member 700 is reduced in diameter along the outer surface shape of the opening 301. The tube 300 is prevented from being detached from the fastening member 700. On the other hand, a groove portion 418 along the lamp axis X is formed on the outer surface 417 of the main body portion 411 of the base 410 at a position facing the lamp shaft X, and the base side edge 702 of the fastening member 700 is formed. By caulking the groove-corresponding position, the caulking portion 703 and the groove portion 418 are engaged with each other so that the base 410 does not come off from the fastening member 700.

The outer tube 300 and the base 410 may be joined by the fastening member 700 and further joined by the adhesive 600.
FIG. 9 is a cross-sectional view for explaining a metal vapor discharge lamp according to Modification 4. As shown in FIG. 9, in the outer tube 300, for example, the inner diameter and outer diameter of the region corresponding to the main tube portion 102 of the discharge tube 100 in the intermediate portion 303 are larger than the inner diameter and outer diameter of other regions. In other words, it may be a middle-bulged shape having a bulged portion 306 in a part of the intermediate portion 303. By providing the bulging portion 306, the temperature rise of the outer tube 300 due to heat from the discharge tube 100 can be reduced, and the tolerance of the material of the outer tube 300 from the strain point can be selected, and the suitable lighting fixture 20 can be selected. Can be widened. Furthermore, the safety when the discharge tube 100 is damaged is also improved. In that case, it is preferable that the gap between the inner peripheral surface 304 of the outer tube 300 and the outer peripheral surface 205 of the inner tube 200 in the bulging portion 306 is designed to be 5 [mm] at the maximum.

  FIG. 10 is a cross-sectional view for explaining a metal vapor discharge lamp according to Modification 5. As shown in FIG. 10, the outer tube 300 has a configuration in which an end 302a (a portion corresponding to the blocking portion 302 in the above embodiment) opposite to the opening 301 is not closed and opened. Also good. In that case, it is conceivable that a lid member 800 made of, for example, metal or ceramic is attached to the opened end portion 302a, and the opening of the end portion 302a is closed by the lid member. For example, the lid member 800 may have a cap shape.

  In the above configuration, if the strength of the lid member 800 is made higher than the strength of the closed portion 302 according to the above embodiment, the discharge tube 100 is ruptured and the portion near the discharge tube of the inner tube 200 is cracked, and the tip 202 is formed. The lid member 800 is less likely to be damaged when blown off, and a configuration in which fragments are less likely to be scattered can be achieved. Note that the strength of the lid member 800 can be adjusted by material selection and dimensional design.

FIG. 11 is a cross-sectional view for explaining a metal vapor discharge lamp according to Modification 6. As shown in FIG. 11, a regulating member 900 may be provided in the gap between the outer tube 300 and the inner tube 200.
The regulating member 900 is disposed outside the distal end portion 202 of the inner tube 200 and inside the closed portion 302 of the outer tube 300, and includes an annular portion 901 that surrounds the inner tube 200 and a distal end portion of the inner tube 200. Arch portion 902 straddling 202.

  The annular portion 901 is, for example, a member obtained by bending or bending a long plate-like member into an annular shape (for example, an octagonal annular shape) having a diameter smaller than the outer diameter of the inner tube 200. When the tube 200 is inserted, the annular portion 901 expands in the radial direction around the tube axis of the inner tube 200.

  For example, the regulating member 900 is inserted into the outer tube 300 in advance before the outer tube 300 is put on the inner tube 200. When the inner tube 200 is covered with the outer tube 300, the annular portion 901 expands with the insertion of the inner tube 200, and the outer surface of the annular portion 901 comes into contact with the outer tube 300. On the other hand, since the inner surface of the annular portion 901 is in contact with the inner tube 200, the postures of the inner tube 200 and the outer tube 300 are corrected by the regulating member 900, and the tube axis of the outer tube 300 and the tube axis of the inner tube 200 are aligned. Match.

  Note that the regulating member 900 does not necessarily need to be in contact with the inner tube 200, and may be in contact with only the outer tube 300. That is, there may be no contact between the regulating member 900 and the inner pipe 200. For example, when the restricting member 900 and the inner tube 200 are in contact with each other only when the inner tube 200 is inclined more than a certain amount with respect to the base 400, the inner tube 200 is inclined when the inclination of the inner tube 200 is within an allowable range. Since there is no need to correct the above, there may be no contact between the regulating member 900 and the inner tube 200.

  Further, the regulating member 900 may not necessarily be in contact with the outer tube 300, and may be in contact only with the inner tube 200. That is, there may be no contact between the regulating member 900 and the outer tube 300. For example, when the regulating member 900 is attached to the inner tube 200 first and then the outer tube 300 is covered later, if the inclination of the inner tube 200 is within an allowable range, the regulating member 900 does not contact the outer tube 300. As described above, when the restriction member 900 and the outer tube 300 are in contact with each other and the posture of the inner tube 200 is corrected only when the inclination of the inner tube 200 is outside the allowable range, the inclination of the inner tube 200 is allowed. When it is within the range, it is not necessary to correct the inclination, so there may be no contact between the regulating member 900 and the outer tube 300.

  The arch portion 902 is formed by bending or bending a long plate-like member extending in the annular portion 901 in an arch shape, and has a function of preventing the outer tube 300 from being damaged when the discharge tube 100 is ruptured. When the discharge tube 100 is ruptured, the vicinity of the discharge tube of the inner tube 200 is cracked, and the distal end portion 202 of the inner tube 200 may blow away toward the closed portion 302 of the outer tube 300, but the distal end portion 202 is caused by the arch portion 902. Since the collision with the closed portion 302 is prevented, the outer tube 300 can be prevented from being damaged.

  The restriction member according to the present invention may be configured to support the inner tube 200 (including the tip-off portion 204) and contact the inner surface 304 of the outer tube 300 by a plurality of claws. In this configuration, for example, by bringing the claw of the regulating member 900 into contact with the inner surface of the outer tube 300, the frictional force and stress from the outer tube are transmitted to the distal end portion 202 of the inner tube 200 when the discharge tube 100 is ruptured. The speed at which the distal end portion 202 of the 200 blows and collides with the closed portion 302 of the outer tube 300 can be attenuated. Further, the restriction member may be configured to support only the tip-off portion 204 and abut against the inner surface 304 of the outer tube 300 by a plurality of claws.

  FIG. 12 is a cross-sectional view for explaining a metal vapor discharge lamp according to Modification 7. As a further modification of the regulating member according to the present invention, as shown in FIG. 12, a regulating member 910 produced by bending one metal wire into a coil shape may be used. The restricting member 910 includes a first coil portion 911 wound around the outer peripheral surface 205 of the inner tube 200, a closed portion 302 of the outer tube 300, and a distal end portion 202 of the inner tube 200 so that the tip-off portion 204 is accommodated therein. It consists of the 2nd coil part 912 arrange | positioned between, and the connection part 913 which connects these 1st coil part 911 and the 2nd coil part 912. FIG. One end of the second coil portion 912 is in contact with the closing portion 302 of the outer tube 300, and the other end is in contact with the distal end portion 202 of the inner tube 200. When the discharge tube 100 is ruptured, the second coil 712 is spring-operated. Since the speed at which the tip 202 collides with the closing part 302 can be attenuated, the breakage of the closing part 302 of the outer tube 300 can be suppressed.

  INDUSTRIAL APPLICABILITY The present invention can be used for a metal vapor discharge lamp having a discharge tube, an inner tube, and an outer tube, particularly a low-wattage and compact triple-tube structure with power consumption of 100 W or less.

DESCRIPTION OF SYMBOLS 1 Illuminating device 10 Metal vapor | steam discharge lamp 20 Reflector 100 Discharge tube 200 Inner tube 201 Pinch seal part 300 Outer tube 301 Base-side end 400 Base 405 Outer-tube side end 406 Outer peripheral surface 407 Swelling part 600 Gutter-shaped member 700 Adhesion Agent

Claims (7)

An inner tube having a pinch seal portion on one end side and having a discharge tube disposed therein is accommodated in a space surrounded by a base and an outer tube, and the pinch seal portion of the inner tube and the outer tube are adhesives. A metal vapor discharge lamp joined with
The pinch seal portion is fitted with a flange-shaped member having an outer peripheral shape along the inner peripheral surface shape of the outer tube, and the adhesive is closer to the base than the flange-shaped member in the outer tube. The metal vapor discharge lamp is solidified in a state of being dammed up by the bowl-shaped member.   The metal vapor discharge lamp according to claim 1, wherein the adhesive is filled so that no gap is formed between the adhesive and the bowl-shaped member.   3. The metal vapor discharge lamp according to claim 1, wherein an outer tube side end portion of the base is inserted into a base side end portion of the outer tube.   The metal vapor discharge lamp according to claim 3, wherein a bulge portion is formed on the outer peripheral surface of the base for contacting the end of the outer tube on the side of the base.   The metal vapor discharge lamp according to any one of claims 1 to 4, wherein the outer tube and the base are joined by the adhesive.   6. The metal vapor discharge lamp according to claim 1, wherein the pinch seal portion of the inner tube and the base are joined by the adhesive.   An illuminating device comprising: the metal vapor discharge lamp according to claim 1; and a reflecting mirror that reflects light emitted from the metal vapor discharge lamp in a desired direction.

Images