JP2008059952A - Lamp device and lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent damage to a base from easily occurring by heat generation due to bulb lighting. <P>SOLUTION: This lamp device is provided with: an arc tube having one discharge path formed by jointing a plurality of bulbs 1a-1f; a bulb support body 31 of a base having a hollow body part having an insertion hole for inserting ends of the bulbs 1a-1f therein, and supporting the arc tube. An adhesive 61 is arranged on the bulbs projecting from the hole on the back side of the bulb support body 31 of the base by excluding wall-side regions on the bulb support body 31 of the base to which the glass bulbs 1a-1f provided with electrodes are adjacent. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention includes a lamp device in which a plurality of glass bulbs bent in a U shape or combined in an H shape are joined to form a single discharge path, and electrodes are provided at both ends of the discharge path, and The present invention relates to a lighting device using the lamp device.

  Conventionally, in this type of lamp device, the arc tube is supported by a base having a hole into which an end of a glass bulb is inserted. In this case, the end of the glass bulb protruding from the hole on the back side of the base holder and the base are fixed with a heat-resistant adhesive such as silicone. For example, Patent Document 1 describes that in the fixing plate 81 constituting the base portion, the valve end and the fixing plate are bonded using an adhesive.

  However, in the lamp device described in Patent Document 1, the base holder (fixing plate) and the bulb end are also in thermal communication with each other through an adhesive, and the base holder deteriorates due to a temperature rise. there were. In addition, a temperature fuse is provided on the back side of the base holder in consideration of damage to the base due to abnormal heat generation of the lamp at the end of its life. Therefore, there is a possibility that this thermal fuse is operated regardless of the end of life, and there is a problem that the lamp is not lit before the end of life.

  Further, the above lamp device is lit by high-frequency power, and there is a problem that discharge occurs in the wells top and the stem top even after the filament breaks, resulting in abnormal heat generation of the electrode part. On the other hand, as described in Patent Document 2, there is known a technique in which discharge is stopped by a leak using a glass inner surface near the die as a rough texture (see Patent Document 2).

JP 2000-331645 A (FIGS. 4 and 5) JP-A-7-153425 (column 0014)

  As described above, in the lamp device, it is a problem that the base part is damaged due to heat generation of the bulb, and in the above conventional technique, heat is generated before the leak occurs. Was inadequate. The present invention has been made in view of the above problems, and provides a lamp device capable of making it difficult to cause damage to the base due to heat generated by the bulb lighting during normal operation or at the end of life, and an illumination device using the same. The purpose is to provide.

  A lamp device according to the present invention has an arc tube in which a plurality of glass bulbs are joined to form a single discharge path; and a hollow body portion in which an insertion hole for inserting an end of the glass bulb is formed. A base that supports the arc tube in the main body; and a glass bulb protruding from the insertion hole on the back side of the base body, and a pair of glass bulbs provided with electrodes are at least in the peripheral wall side region of the adjacent base A heat-resistant adhesive that is provided so as not to be applied and fixes the end of the glass bulb to the base body.

  As the glass bulb, a plurality of bulbs each having a U shape or an H shape are joined and used. The base is made of a heat resistant synthetic resin or the like. As the heat resistant adhesive, silicone resin or epoxy resin is allowed.

  A lamp device according to the present invention has an arc tube in which a plurality of glass bulbs are joined to form a single discharge path; and a hollow body portion in which an insertion hole for inserting an end of the glass bulb is formed. A base that supports the arc tube at the main body, and provided at the end of a pair of glass bulbs provided with electrodes protruding from the insertion holes on the back side of the base, the outer diameter being smaller than the glass bulb diameter And a reduced diameter portion.

  The illuminating device according to the present invention comprises an appliance main body; and the lamp device according to claim 1 or 2 attached to the appliance main body.

  In the lamp device according to the present invention, the heat resistant adhesive is not applied at least to the peripheral wall side region of the base adjacent to the pair of glass bulbs provided with the electrodes. There is an effect that heat conduction does not occur through the heat-resistant adhesive from the end portion of the provided glass bulb to the wall side of the base at a short distance, and thermal damage to the base is difficult to be applied. In the lamp device according to the present invention, the end portion of the glass bulb provided with the electrode has a reduced diameter portion whose outer diameter is reduced from the diameter of the glass bulb tube. Therefore, the reduced diameter portion is formed at the insertion hole portion in the base. Is located, the distance between the heat source and the base can be increased, and there is an effect that thermal damage to the base is difficult to be applied. Since the illuminating device according to the present invention uses the lamp device described above, thermal damage to the base is difficult to be applied, and the life can be extended.

<Example 1>
Embodiments of a lamp device and a lighting device according to the present invention will be described below with reference to the accompanying drawings. In each figure, the same components are denoted by the same reference numerals, and redundant description is omitted. FIG. 1 is a front view showing an embodiment of a lamp device according to the present invention, and FIG. 2 is a plan view seen from the direction of arrow X in FIG. Here, the lamp in the lamp device is formed by connecting glass bulbs 1 a to 1 f constituted by six straight pipes adjacent to each other in parallel to each other by a coupling pipe 11. It is configured to function as a bulb having a discharge path. This valve is filled with a rare gas such as argon (Ar) or krypton (Kr), or a gas containing mercury.

  A pair of electrodes 16 are sealed by stem seals or pinch seals at respective one end portions of the bulbs 1a and 1f located adjacent to both ends of the discharge path. Each electrode 16 has a filament coil, and this filament coil is supported by a pair of linear wells. Each of the wells is, for example, wires (outer wires) 21 to 24 led out from one end of the valves 1a and 1f at both ends to each other via a jumet wire sealed at one end of the valves 1a and 1f at both ends. .

  One end side of each of the valves 1a to 1f is six pieces formed on a hollow valve support 31 as a base body made of a heat-resistant synthetic resin such as polybutylene terephthalate (PBT) constituting the base 3. An adhesive such as silicone resin or epoxy resin is injected into the recess surrounded by the side wall 32 of the valve support 31 through the insertion hole, and the valves 1a to 1f are valve It will be in the state fixed to the support body 31. FIG.

  In this embodiment, a case 35 in which the thermal fuse 4 is housed is provided on the concave side of the valve support 31. The case 35 may be formed integrally with the valve support 31, and is separate from the valve support 31, and is bonded when the valves 1 a to 1 f are fixed to the valve support 31. You may make it fix and provide with an agent.

  The case 35 is provided so that the main body portion of the thermal fuse 4 is positioned on the valve side (lower side in FIG. 3) from the end positions of the valves 1a to 1f. Further, the case 35 has one end side in the longitudinal direction of the case 35 and the end of the valve 1a so that the main body portion of the thermal fuse 4 is disposed in the vicinity of the valves 1a and 1f provided with the electrodes 16. It is located near the end of A wire 24 is wrapped around a wire 41 in the thermal fuse 4, and a wire 42 is wrapped around a wire 41 other than the wire 41 where the wire 24 is wrapped.

  In this embodiment, when the adhesive 61 such as silicone resin or epoxy resin is injected into the recess surrounded by the side wall 32 of the valve support 31, the adhesive 61 is adjacent to the valves 1a and 1f provided with the electrodes 16. The valves 1 a to 1 f are fixed to the valve support 31 except for the wall-side region.

  For example, as shown in FIG. 4A, the adhesive 61 is provided except for regions adjacent to the valves 1a and 1f provided with the electrodes 16. Here, a region where the adhesive 61 is not applied will be described. As shown in FIG. 4B, on the bottom surface 38 of the valve support 31, a line segment connecting the tube center of the valve 1a and the tube center of the valve 1f is defined as one side, and the valve support 31 is separated from the tube center of the valve 1a. The adhesive 61 is not applied to the region 65 in which a rectangle is drawn with the line segment reaching the side wall 32 as the other side.

  The regions 66 and 66 adjacent to the region 65 and separated by an angle of 90 degrees from the tube centers of the valves 1a and 1f are used when the valves 1a and 1f are not properly fixed unless the adhesive 61 is applied. The area is allowed to be applied. That is, the areas 66 and 66 are areas where application of the adhesive 61 should be avoided as much as possible. Among the regions surrounded by the tangent line that contacts the valve-side outer wall of the valves 1b and 1e adjacent to each of the valves 1a and 1f, and the line segment that connects the tube center of the valve 1a and the tube center of the valve 1f, The region 67 including most regions and the regions 68 and 68 from the region 67 to the side wall 32 of the valve support 31 are regions where it is preferable to avoid the application of the adhesive 61.

  As described above, by restricting the application of the adhesive 61 for each region and not applying the adhesive 61 to at least the region 65, the end portions of the sub-valves 1a and 1f provided with high-temperature electrodes among the valves can be used. In particular, heat conduction does not occur through the adhesive 61 to the side wall 32 of the valve support 31 in the base 3 at a short distance, and the effect that thermal damage to the base 3 is difficult to be exerted can be achieved.

  Further, in this embodiment, as shown in FIG. 5, the distance from the valve support 31 that supports the valve in the base 3 to the filament 16 f of the electrode 16 provided in the valve is thermally transferred to the valve support 31. The distance is set so as not to cause damage. Inner wells 92 and 92 are provided at corresponding positions in the pipe of the valve positioned in the insertion hole of the valve support 31, and the filament 16 f exists above the inner wells 92 and 92. For example, the distance L from the filament 16f shown in FIG. 5 to the bottom surface 38 of the valve support 31 is preferably 12 mm or more.

  With such a configuration, the distance from the filament 16f, which is a heat generating portion, to the base 3 (in the embodiment, the bottom surface 38 of the valve support 31) is long, and heat conduction hardly occurs, thereby reducing thermal damage to the base 3. be able to. In addition, the structure which lengthens the distance from the filament 16f to the nozzle | cap | die 3 in this way can also be applied to the lamp apparatus in the 2nd Example demonstrated later.

  As shown in FIG. 5, the base 3 is composed of a valve support 31 and a pin support 50 made of a heat-resistant synthetic resin such as polybutylene terephthalate (PBT) that is bonded to the valve support 31. Four pins 51 are implanted in the pin support 50 so as to protrude from the front and back of the pin support 50. The tips of the wires 21, 22, and 23 are inserted and fixed to three of the four pins 51. In the remaining one pin 51, a wire 42 that is separately prepared and wrapped around the wire 41 is inserted and fixed. After the wires 21, 22, 23, and 42 are connected to the pins 51, the valve support 31 and the pin support 50 are fitted into a state shown in FIG.

  In the pin support 50, columnar parts 53 projecting outward from the base part 52 in which the pins 51 are planted are formed, and the columnar part 53 is formed with uneven parts 54 for retaining it in several places. When the base 3 is inserted into the connector on the power supply side to which the lamp device is connected, an appropriate meshing state is realized and the electric lamp is firmly fixed. On the power source side, for example, a lamp can be lit using a circuit disclosed in Japanese Patent Application No. 2005-221748. Such a configuration of the base 3 and a configuration of the power supply unit are similarly applied to a second embodiment described later.

<Example 2>
The lamp device shown in FIG. 6 is a front view of the lamp device according to the second embodiment, and is a diagram in which the portion of the base 3 is transmitted through the filament 16f, and the coupling tube 11 is omitted. In this embodiment, a diameter-reduced portion 91 having a diameter smaller than the outer tube diameter of the valves 1a and 1f is provided at the ends of the valves 1a and 1f provided with electrodes protruding from the insertion holes on the back side of the valve support 31. , 91.

  Inner wells 92 and 92 extend from the ends of the bulbs 1a and 1f in the upward direction inside the bulbs 1a and 1f, and substantially central portions of the inner wells 92 and 92 are fixed by bead glasses 93 and 93, respectively. In this embodiment, the end portions of the bulbs 1a and 1f from the bead glasses 93 and 93 are reduced diameter portions 91 and 91, respectively. FIG. 7 is a plan view in which the coupling tube 11 of the lamp device shown in FIG. 6 is omitted, and the tube region of each bulb on the bottom surface 38 of the bulb support 31 is hatched and superimposed. is there. The adjacent valves 1a and 1f have reduced diameter portions 91 and 91 that are reduced in diameter from the outer diameter of the pipe (the outer diameter of the pipe in the normal portion).

  FIG. 8 shows a manufacturing process of the reduced diameter portions 91 and 91. First, two pipes are connected via the coupling pipe 11 to create an H-shaped pipe (or a straight pipe is bent to create a U-shaped pipe). A part of the valve to be the reduced diameter portion 91 is heated by the burner 97 (FIG. 8 (1)).

  An electrode (or electrode mount) including a filament 16f or the like is positioned in one end of the tube, and the electrode (or electrode mount) is sealed and sealed using a mold 98, and a reduced diameter portion 91 is created (see FIG. 8 (2)). The electrode (or electrode mount) is sealed and sealed, and the tube having the reduced diameter portion 91 is completed (FIG. 8 (3)). Two such tubes having the electrode and the reduced diameter portion 91 and one tube not having the electrode and the reduced diameter portion 91 are combined to form a lamp having one discharge path.

  When the valve created in this way is mounted on the valve support 31, the reduced diameter portion 91 is positioned in the insertion hole of the valve support 31 as shown in FIG. 6, and the space around the reduced diameter portion 91 becomes a space. Adhesive 61 may be applied to the gap between the reduced diameter portion 91 and the insertion hole, and the bulbs 1a and 1f may be fixed. However, if no adhesive is applied as shown in FIG. It is more suitable because it is difficult to conduct.

  As described above, in the JIS model number FHT42 (42 watts), a configuration including the reduced diameter portion 91 as described above was adopted so as to include a configuration including the reduced diameter portion 91 as described above. In this case, the tube diameter before the diameter reduction is 12.6 mm, and the tube diameter after the diameter reduction is set to 8.6 mm. While the temperature was 200 ° C., the temperature of the cap portion after the diameter reduction was found to decrease to about 150 ° C. As described above, according to this embodiment, the reduced diameter portion 91 is located in the insertion hole of the valve support 31 and a space is generated around the reduced diameter portion 91, so that heat conduction is less likely to occur than in a configuration without a space. , There is an effect that the thermal damage to the base 3 is difficult to be added.

  As shown in FIG. 5, the lamp device 60 according to each embodiment having the base 3 is fitted into a socket 72 in a lighting fixture body 71 as shown in FIG. Can be used.

The front view which shows the principal part structure of the lamp device which concerns on this invention. The top view which looked at the lamp apparatus shown by FIG. 1 from the arrow X direction. FIG. 3 is a perspective view showing the lamp device in the state shown in FIG. 2. The figure explaining the adhesive agent application | coating area | region in the lamp device which concerns on this invention. The front view for demonstrating the position of the filament in the lamp device which concerns on this invention. The front view which shows the structure in the 2nd Example of the lamp device which concerns on this invention. The top view which abbreviate | omitted and showed the coupling tube of the lamp apparatus shown in FIG. The figure which shows the manufacturing process of the reduced diameter part in 2nd Example of the lamp device which concerns on this invention. The figure which shows the structure of the illuminating device which employ | adopted the lamp device which concerns on each Example of this invention.

Explanation of symbols

1, 1a to 1f Valve 3 Base 4 Thermal fuse 11 Coupling tube 16 Electrode 16f Filament 21 to 24 Wire (outer wire)
31 Valve support 35 Case 38 Bottom 41 (Temperature fuse) Wire 42 Wire 61 Adhesive 65-68 Region 91 Reduced diameter portion 92 Inner wells 93 Bead glass

Claims (3)

An arc tube in which a plurality of glass bulbs are joined to form a single discharge path;
A base having a hollow main body in which an insertion hole for inserting an end of the glass bulb is formed, and supporting the arc tube by the main body;
On the back side of the base body, for the glass bulb protruding from the insertion hole, a pair of glass bulbs provided with electrodes are provided at least so as not to be applied to the peripheral wall side region of the adjacent base, and the end of the glass bulb is connected to the mouthpiece. A heat resistant adhesive to be fixed to the body;
A lamp device comprising: An arc tube in which a plurality of glass bulbs are joined to form a single discharge path;
A base having a hollow main body in which an insertion hole for inserting an end of the glass bulb is formed, and supporting the arc tube by the main body;
A reduced diameter portion provided at the end of a pair of glass bulbs provided with electrodes protruding from the insertion holes on the back side of the base body, and having an outer diameter reduced from the glass bulb diameter;
A lamp device comprising: An instrument body;
The lamp device according to claim 1 or 2, attached to the instrument body;
An illumination device comprising:

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