JP2007200806A - Halogen lamp, and lamp device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize a shape for easily mounting a halogen lamp with a bulb, having a sealing part by sealing at reduced pressure on a heat-resistant base member. <P>SOLUTION: At both ends of a tungsten coil 13 inserted into a quartz bulb 12, lead-in wires 171, 172 for power supply are respectively welded to the other end of a pair of molybdenum foils 161, 162, where one end at the halogen lamp 11 is constituted of sealing parts 151, 152 by sealing the upper part bulb 12 of the molybdenum foils 161, 162 at the reduced pressure. At the outer periphery of the sealing parts 151, 152, male screws 181, 182 have been integrally formed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a halogen lamp used as a fixing heater in, for example, a copying machine, and a lamp device using the lamp.

Conventionally, as a halogen lamp used for a fixing device of a copying machine, a halogen lamp using a sealing portion by reduced pressure sealing instead of a sealing portion manufactured by a pinch seal method has been considered. (For example, Patent Document 1)
Since the sealing by the pinch seal of Patent Document 1 is structurally thin and weak in strength, there is an attachment method in which a ceramic base is attached to the sealing portion and the ceramic base portion is supported by a metal clamper. It is used.

Recently, a halogen lamp using a so-called shrink seal that performs sealing by decompression sealing instead of the pinch seal sealing method has been considered. (For example, Patent Document 2)
JP 2001-210454 A JP 9-320547 A

  The technology of the above-mentioned patent document 1 is that the shape of the sealing part is larger than the outer diameter of the valve, does not come out perpendicular to the valve, the sealing part is bent, the left and right sealing parts are bent, and the valve at the exhaust pipe connecting part is deformed. Due to problems such as bending, the base member cannot be covered unless the crossing of the base members is increased. Bending and cement sticking out are observed when fixing with ceramic cement, etc., and the cement powder falls off. It was. In addition, since the technique of Patent Document 2 does not describe the base member, the base member to be used can be fixed with ceramic cement or the like as in Patent Document 1, and the cement powder protrudes and the cement powder falls off. The problem of doing is considered.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a halogen lamp that realizes a shape for easily attaching a bulb sealing portion to a heat-resistant base member, and to lower the lamp device using this halogen lamp.

  In order to solve the above-described problems, a halogen lamp of the present invention includes a tungsten coil inserted into a bulb, a pair of molybdenum foils welded to both ends of the coil, and a power supply to the other end of the molybdenum foil. And a sealing portion in which the bulb above the molybdenum foil is sealed by decompression sealing, and an engagement means is integrally formed on the outer periphery of the sealing portion. It is formed.

  The lamp device according to the present invention also includes a tungsten coil inserted into a quartz bulb, a pair of molybdenum foils welded to both ends of the coil, and a power supply lead wire to the other end of the molybdenum foil. A sealing portion in which the valve on the upper part of the molybdenum foil is sealed by decompression sealing, engaging means integrally formed on the outer periphery of the sealing portion, and engaging with the engaging means, And a base member formed of a heat-resistant and insulating material that supports the sealing portion.

  According to the present invention, it is possible to realize an attachment part for easily attaching a halogen lamp having a bulb sealing part to a heat-resistant base member. Further, the base member can be fixed to the sealed portion by a simple operation of inserting the base member into the glass portion sealed with the shrink seal and turning the base member.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
1 and 2 are diagrams for explaining an embodiment of the halogen lamp according to the present invention. FIG. 1 is a block diagram, and FIG.
1 and 2, reference numeral 11 denotes a halogen lamp which is a kind of tube-type incandescent bulb. The halogen lamp 11 is frequently used as a heater for fixing, for example, and has a bulb 12 made of quartz glass having radiation permeability. Inside the bulb 12, a tungsten filament 13 which is an example of an electric resistance wire of a refractory metal is housed concentrically as a heat source. The filament 13 is kept concentric with the valve 12 by a plurality of anchors 14 disposed in the axial direction in the valve 12. In addition, in the bulb 12, an inert gas such as argon Ar or nitrogen N ₂ together with a trace amount of a halogen substance such as a mixture of bromine Br and chlorine Cl is about 0.9 × 10 ⁵ Pa (pascal at 25 ° C.). ) Pressure sealed. Sealing portions 151 and 152 by reduced pressure sealing are formed at both ends of the valve 12 in the axial direction. In the sealing portions 151 and 152, rectangular foil-shaped metal foils 161 and 162 made of conductive, for example, molybdenum (Mo) having an expansion coefficient approximate to that of the valve 12 are embedded.

  Here, the sealing under reduced pressure is a sealing method called shrink seal, and the lamp is sealed once except for the sealing portion, and the molybdenum foil is hermetically sealed in a state where the inside of the lamp including the sealing portion is decompressed. Is. This sealing method can improve the strength of the sealing portion because the thickness of the quartz glass is not biased unlike the sealing method by the pinch seal.

  One end 131 of the filament 13 is connected to one end of the metal foil 161, and the other end 132 of the filament 13 is connected to one end of the metal foil 162. The other end of the metal foil 161 is connected to an introduction line 171 for supplying power, and the other end of the metal foil 162 is connected to an introduction line 172 for supplying power.

  Male screws 181 and 182 which are integrally engaging means are formed on the outer periphery of the sealing portions 151 and 152, respectively. The male screws 181 and 182 are formed by using, for example, a mold when the sealing portions 151 and 152 are formed and the portions become soft. The male screws 181 and 182 may be female screws.

  FIGS. 3 and 4 illustrate a first embodiment of the lamp device of the present invention using the halogen lamp 11 of FIGS. 1 and 2. FIG. 3 is an enlarged perspective view of the main part, and FIG. FIG. The same components as those of the halogen lamp 11 will be described with the same reference numerals.

  In this embodiment, the male members 181 and 182 of the halogen lamp 11 are attached to the base members 31 and 32 by screwing.

  That is, as shown in FIG. 3, 31 and 32 are, for example, bottomed cylindrical heat-resistant and insulating base members made of ceramics such as steatite. The base members 31 and 32 hold the sealing portions 151 and 152 of the halogen lamp 11, and insulate and protect the portions where the lead wires 171 and 172 and an external lead (not shown) are electrically connected by welding or the like. is there.

  Here, the base members 31 and 32 will be described in more detail with reference to FIG. 4. The base members 31 and 32 have the same configuration, and FIG. 4 shows an enlarged cross section of the base member 31. The description of the configuration of 32 is omitted.

  That is, the base member 31 is formed with a fitting recess 33 in which the sealing portion 151 is loosely fitted. An insertion hole 35 having a diameter larger than the outer diameter of the introduction wire 171 and having play is provided in the bottom 34 of the fitting recess 33. On the inner peripheral surface of the fitting recess 33 in the vicinity of the bottom portion 34, a female screw 36 serving as a fitting portion to be fitted to the male screws 181 and 182 as engaging means is formed. The base member 32 has the same configuration.

  According to this embodiment, it is possible to realize an attachment portion for easily attaching a halogen lamp having a bulb sealing portion to a heat-resistant base member.

  Next, attachment of the base member 31 will be described with reference to FIG. First, when the lead-in wire 171 is passed through the insertion hole 35 from the fitting recess 33 and the male screw 181 comes into contact with the female screw 36, the base member 31 is rotated clockwise, for example, so that the male screw 181 and the female screw 36 are screwed. Combine. Thereby, the base member 31 can be attached to the sealing part 151.

  The relationship between the male screw 181 and the female screw 36 may be reversed.

  In this embodiment, the base member can be fixed to the sealed portion by a simple operation of inserting the base member into the glass portion sealed with the shrink seal and turning the base member.

  5 to 7 are diagrams for explaining a second embodiment of the lamp device according to the present invention. FIG. 5 is an enlarged perspective view of the main part, FIG. 6 is a perspective view of the main part of FIG. FIG. 6 is a cross-sectional view of the state in which FIG. 6 is attached to FIG. 5. Also in this embodiment, only one sealing portion 151 of the halogen lamp 11 is shown, and the base member 31 attached to the sealing portion 151 will be described.

  The sealing part 151 sealed by the shrink seal forms a plurality of convex parts 51 as shown in FIG. As shown in FIG. 6, the base member 31 is integrally formed with a plurality of concave portions 61 in the axial direction of the fitting concave portion 33 and the engaging portions 62 in the counterclockwise direction in the middle of the concave portions 61. The concave portion 61 has such a size that the convex portion 51 can freely move, and the engaging portion 62 has such a relationship that it does not come off after engaging the convex portion 51 of the sealing portion 151.

  Next, attachment of the base member 31 will be described with reference to FIG. First, the convex portion 51 of the sealing portion 151 is moved to the concave portion 61 of the fitting concave portion 33, and the introduction wire 171 is passed through the insertion hole 35 from the fitting concave portion 33. Next, the base member 31 is rotated in the direction of arrow A in the drawing, and the convex portion 51 is moved in the direction of arrow B in the drawing to engage with the engaging portion 62. Thereby, the base member 31 can be attached to the sealing part 151.

  Note that at least the bottom 34 side of the engaging portion 61 may be gradually narrowed toward the back, or the width of the convex portion 51 may be gradually narrowed with respect to the engaging portion 61. Thereby, engagement of the convex part 51 and the engaging part 61 becomes more reliable.

  Also in this embodiment, the base member 31 can be fixed to the sealed portion by inserting the base member 31 into the sealing portion 151 and turning the base member 31.

  8 to 10 are for explaining a third embodiment of the lamp device according to the present invention. FIG. 8 is an enlarged perspective view of the main part, FIG. 9 is a perspective view of the main part of FIG. FIG. 9 is a sectional view of FIG. 9 attached to FIG. Also in this embodiment, only one sealing portion 151 of the halogen lamp 11 is shown, and the base member 31 attached to the sealing portion 151 will be described.

  As shown in FIG. 8, a plurality of convex portions 81 are formed on the outer peripheral surface along the axial direction of the sealing portion 151 sealed with the shrink seal. As shown in FIG. 9, a plurality of recesses 91 are integrally formed along the axial direction of the fitting recess 33 of the base member 31. The concave portion 91 is formed such that the width of the convex portion 81 gradually decreases in the direction reaching the bottom portion 34 of the base member 31, and the convex portion 81 and the concave portion 91 are similar in the vicinity of the position where the convex portion 51 hits the bottom portion 34. Designed to be a width relationship.

  Here, attachment of the base member 31 will be described with reference to FIG. First, the convex portion 81 of the sealing portion 151 is moved to the concave portion 91 of the fitting concave portion 33, and the introduction wire 171 is passed from the fitting concave portion 33 through the insertion hole 35. At this time, as the sealing portion 151 approaches the bottom portion 34, the gap between the concave portion 91 and the convex portion 81 narrows, and when the vicinity of the bottom portion 34 is reached, the convex portion 81 and the concave portion 91 are engaged. Thereby, the base member 31 can be attached to the sealing part 151.

  By the way, the convex portion 51 is not only gradually reduced in width in the direction reaching the bottom portion 34 of the base member 31, but also may be formed by reducing the width of the concave portion 91 gradually in the direction reaching the bottom portion 34. The widths of 51 and the recess 91 may be gradually reduced.

  In this embodiment, the convex portion 81 can be fitted into the concave portion 91 by simply inserting the concave portion 91 of the base member 31 in accordance with the convex portion 81 of the sealing portion 151.

  The present invention is not limited to the above-described embodiment. For example, the base member used in each embodiment of the lamp device is not only shown to support the halogen lamp 11 but also to the introduction lines 171 and 172. By covering up to the portion connected to the external lead, it is also possible to double the insulation of the connecting portion.

The block diagram for demonstrating one Embodiment of the halogen lamp of this invention. The block diagram for magnifying and explaining the principal part of FIG. BRIEF DESCRIPTION OF THE DRAWINGS The block diagram for demonstrating 1st Embodiment of the lamp mounting apparatus of this invention. The block diagram for magnifying and explaining a part of FIG. The expansion perspective view of the principal part for demonstrating 2nd Embodiment of the lamp attachment apparatus of this invention. The expansion perspective view of the base member attached to FIG. Sectional drawing of the state which attached FIG. 6 to FIG. The enlarged perspective view of the principal part for demonstrating 3rd Embodiment of the lamp attachment apparatus of this invention. The expansion perspective view of the base member attached to FIG. Sectional drawing of the state which attached FIG. 9 to FIG.

Explanation of symbols

11 Halogen lamp 12 Bulb 13 Filament 14 Anchor 151, 152 Sealing portion 161, 162 Metal foil 171, 172 Lead wire 181, 182 Male thread 31, 32 Base member 33 Fitting recess 33
34 bottom 35 insertion hole 36 female screw 51, 81 convex part 61, 91 concave part 62 engaging part

Claims (4)

A tungsten coil inserted into the bulb, a pair of molybdenum foils welded to both ends of the coil, and a lead wire for power supply to the other end of the molybdenum foil. In a halogen lamp having a sealing portion sealed with reduced pressure sealing,
A halogen lamp characterized in that an engaging means is integrally formed on the outer periphery of the sealing portion.   The halogen lamp characterized in that the engaging means is formed with a screw or a convex portion. A tungsten coil inserted into the quartz bulb, a pair of molybdenum foils welded at one end to both ends of the coil, and a power supply lead wire to the other end of the molybdenum foil, respectively, A sealing part in which the valve is sealed by decompression sealing;
Engaging means integrally formed on the outer periphery of the sealing portion;
And a base member made of a heat-resistant and insulating material that is engaged with the engaging means and is supported by the sealing portion. The engaging means is constituted by a screw or a convex part,
The said base member was comprised from the fitting recessed part which accommodates the said sealing part, and the fitting part formed in this fitting recessed part inner periphery and fitted to the said engaging means. Lamp device.

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