JP3712079B2 - Incandescent light bulb and lighting device - Google Patents

Description

【００５８】
以上の結果から、本発明がフィラメント８の位置を精度良く配置できることが理解できる。従来技術１の不良の原因は、フィラメントを遮光部材等に支持させ中心軸に位置決めしている部材に直接フィラメントを固定していないためである。また、従来技術１は、中心軸に位置決めしている部材が細いワイヤーで、そのワイヤーがバルブの内壁から延びてフィラメントの重量を支えているので、ワイヤーの曲がりや、変形が発生しやすい点も不良の原因である。
【００５９】
従来技術２は、従来技術１と同様、フィラメントを遮光部材等に支持させ中心軸に位置決めしている部材に直接フィラメントを固定していないことが、不良の原因になっている。
【００６０】
従来技術３は、排気管を封止切るときに、フィラメントの支持部材が横にずれたり、傾いてしまうのが不良の原因である。
【００６１】
図５は、図１ないし３のハロゲン電球を反射鏡と組み合わせた照明装置の一部断面を有する正面図である。ハロゲン電球１は、反射体２０に収容されている。反射体２０は、反射面２１を形成したリフレクタ２２を有し、このリフレクタ２２にはセラミックなどからなる口金２３を接合している。この口金２３には捩じ込み形口金２４および外部端子２５が設けられており、これら捩じ込み形ロ金２４および外部端子２５を介して電源に接続される。
【００６２】
このような反射体２０に収容されたハロゲン電球１が点灯されると、バルブ２および赤外線反射膜７を透過した可視光が反射面２１で反射され、リフレクタ２２の前面開口部から前方を照射する。この場合、赤外線は赤外線反射膜７によりバルブ２内に戻されるからリフレクタ２２に達しなく、リフレクタ２２の温度上昇が防止され、かつ赤外線はリフレクタ２２の前方にも照射されず、温度上昇を嫌う可視光照射に有効である。
【００６３】
このような反射形照明装置によれば、ハロゲン電球１の効率が向上するから、その利点を活用することができ、効率の高い照明装置となる。
【００６４】
そして、リフレクタ２２の反射面に図示しないが可視光反射赤外線透過膜をコーティングしたダイクロイックミラーの場合は、照射面の温度上昇をさらに抑止することができる。
【００６５】
図６は、本発明の白熱電球の第２の実施の形態を表す正面図である。第２の実施の形態では、バルブ２の他端に形成される細管６ａの筒部の大きさを排気管６ｂよりも大きく、ただし、膨出部５よりも小さくし、この細管６ａに挿入される第２の係止部１０ｃとしてのリング形の径を大きくしている。
【００６６】
このようにリング形の第２の係止部１０ｃの径を支障の無い程度に大きくすれば、センター出しの精度を損なうことなくフィラメント８を支持する機械的的強度を高くできる。
【００６７】
図７は、本発明の白熱電球の第３の実施の形態を表す正面図である。第３の実施の形態では、第１の係止部１０ｂおよび第２の係止部１０ｃが、軸方向に沿って形成された複数ターンのリング部または螺旋部によって構成された例を示し、少なくとも２ターン以上のリング部または螺旋部が細管６内に挿入されることにより、入口部のリング部が第１の係止部１０ｂとなり、奥部のリング部が第２の係止部１０ｃとなって細管６に係止される。
【００６８】
図８は、本発明の白熱電球の第４の実施の形態を表す正面図である。第４の実施の形態では、第１および第２の係止部１０ｂ、１０ｃが波形に屈曲されており、入口部の波形部が第１の係止部１０ｂとなり、奥部の波形部が第２の係止部１０ｃとなって細管６に挿入されている。
【００６９】
図９は、本発明の白熱電球の第５の実施の形態を表す正面図である。第５の実施の形態では、一方のリード線１０に第１の係止部１０ｂおよび第２の係止部１０ｃを形成し、これら第１および第２の係止部１０ｂ、１０ｃを細管６に挿入するとともに、他方のリード線１１に、円筒部４に挿入される第３の係止部１１ｂとなる例えばリング部または螺旋部を形成している。
【００７０】
図１０は、本発明の白熱電球の第６の実施の形態を表す正面図である。第６の実施の形態では、一対のリード線１０および１１の基端側に、円筒部４の内面に接触して位置を規制するための屈曲した出っ張り部１０ｅ、１１ｃを形成したものである。出っ張り部１０ｅ、１１ｃは、第３の係止部を構成している。
【００７１】
このようにすれば、一対のリード線１０および１１の両者のセンターが規制されるから、フィラメント８をバルブ中心軸上に良好に保持することができる。
【００７２】
図１１は、本発明の白熱電球のフィラメント継線部の変形態様を拡大して示す部分拡大図である。この変形態様では、第１、第２のリード線１０および１１に、それぞれフィラメント継線部１０ｄ、１１ａと連続して波形部１０５を形成した（一方にリード線１０の波形部１０５のみを図示する）ものであり、この波形部１０ｄにフィラメント８の脚部８ａが差し込まれている。このようにすると、フィラメント８の脚部８ａの移動が波形部１０５により防止されるようになり、よって、フィラメント８の移動が阻止され、フィラメント８の支持が確実になる。
【００７３】
【発明の効果】
請求項１の発明によると、フィラメントが接続される第１の内部リード線が直接細管内面に係止しているので、第１の内部リード線の位置決め精度が高い。また第１の内部リード線は、バルブの太い部分ではなく、細管内に挿入係止されている。太い部分の中心を求めるよりも、細い部分の中心を求める方が容易であるから、第１の内部リード線を細管内に挿入係止することで第１の内部リード線の位置決め精度が向上する。さらに、第１の内部リード線の係止部は、排気管封止切り跡に溶融固定されていないので、溶融固定の際に、位置ずれを起こすことがない。
【００７４】
以上の３点から、内部リード線の位置決め精度は高く、この第１の内部リード線に固定されたフィラメントもバルブ中心に精度良く配置される。この結果、赤外線反射膜による赤外線帰還率が高くできる。
【００７５】
これらの結果、フィラメントへの赤外線の帰還率が低下せず、ランプ効率の高い白熱電球を得ることができる。
【００７６】
特にリング形状と螺旋形状は、ともにそのリングまたは螺旋の中心がバルブの中心軸と一致しやすいので、フィラメントを中心軸上に配置する設計がしやすく、第１の内部リード線の折曲加工がしやすい。そのため、安価に製造することができる。
【００７７】
また、一方の焦点近傍から放射された赤外線は、他方の焦点近傍に確実に戻ってくる分、円筒バルブを有する白熱電球よりも赤外線帰還率は高くなり、ランプ効率の高い白熱電球を得ることができる。
【００７８】
請求項２の発明によれば、係止部が軸方向に離間した第１の係止部と第２の係止部の２カ所なので、係止部の傾きが抑制でき、フィラメントの位置決めが確実になる。その結果、フィラメントへの赤外線の帰還率が低下せず、ランプ効率の高い白熱電球を得ることができる。
【００７９】
請求項３の発明によれば、軸方向にずらして複数回、リング状または螺旋状に巻かれているので、係止部の細管内での傾きを抑制できる。その結果、フィラメントの位置決め精度は、より一層向上し、フィラメントへの赤外線の帰還率が高く、ランプ効率の高い白熱電球を得ることができる。
【００８０】
請求項４の発明によれば、単一の線材を使用することで構造が極めて簡単になる。そのために製造が容易であり、安価に製造できる。
【００８１】
請求項５の発明によれば、第１の内部リード線をフィラメントの端部の一次コイル部分に嵌挿することで、両者を接続固定しているので、構造が簡単であり、フィラメントの端部の一次コイル部分と第１の内部リード線が同軸的に接続されているので、この接続部におけるフィラメントの位置ずれは小さい。
【００８２】
請求項６の発明によれば、第２の内部リード線の他端を、フィラメントの封止部側端部の一次コイル内に挿入接続することで、フィラメントの位置決めは、より一層確実になる。その結果、フィラメントへの赤外線の帰還率の低下がより確実に抑制でき、ランプ効率の高い白熱電球を得ることができる。
【００８３】
請求項７の発明によれば、赤外線反射面を大きく確保することができ、フィラメントの位置を軸上に決め易い。その結果、フィラメントへの赤外線の帰還率の低下が抑制でき、ランプ効率の高い白熱電球を得ることができる。また、製造上の障害が抑えられる。
【００８４】
請求項８の発明によれば、封止部よりもフィラメントに近い位置にビードガラスが設けられていることで、第２の内部リード線の位置決めがより確実なものとなる。この結果、フィラメントの位置決め精度が向上し、赤外線帰還率の低下が抑制でき、ランプ効率の高い白熱電球を得ることができる。
【００８５】
請求項９の発明によれば、ビードガラスよりもフィラメントに近い位置に第３の係止部が形成されているので、第２のリード線の位置ずれがさらに抑制され、フィラメントの位置決め精度がより一層向上する。この結果、赤外線帰還率の低下が抑制でき、ランプ効率の高い白熱電球を得ることができる。
【００８６】
請求項１０の発明によれば、請求項１ないし９に記載の白熱電球の利点を生かした照明装置を提供することができる。
【図面の簡単な説明】
【図１】本発明に係る白熱電球の第１の実施の形態の口金部省略した正面図である。
【図２】図１のII−II線における断面図である。
【図３】図１に口金部を付加した斜視図である。
【図４】（Ａ）ないし（Ｄ）図はマウントの製造方法を示す説明図である。
【図５】図１ないし図３に示すハロゲン電球を光源とした反射形照明装置の断面図である。
【図６】本発明の白熱電球の第２の実施の形態を表す正面図である。
【図７】本発明の白熱電球の第３の実施の形態を表す正面図である。
【図８】本発明の白熱電球の第４の実施の形態を表す正面図である。
【図９】本発明の白熱電球の第５の実施の形態を表す正面図である。
【図１０】本発明の白熱電球の第６の実施の形態を表す正面図である。
【図１１】本発明の白熱電球のフィラメント継線部の変形態様を拡大して示す部分拡大図である。
【符号の説明】
１…ハロゲン電球 ２…バルブ
３…封止都 ４…円筒部
５…膨出部 ６…細管
７…赤外線反射膜 ８…フィラメント
１０…第１の内部リード線 １１…第２の内部リード線
１０ｂ…第１の係止部 １０ｃ…第２の係止部
２０…反射体 ２２…レフレクタ
１１ｂ…第３の係止部[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to an incandescent light bulb and a lighting device using the same.
[0002]
[Prior art]
  In general, an incandescent bulb including a halogen bulb is a light source that uses light emission by incandescence of a filament. Therefore, a lot of energy is released as heat, and the lamp efficiency tends to be lower than that of a discharge lamp. In order to reduce the heat dissipation of such an incandescent bulb and improve the lamp efficiency, recently, a lamp that has formed a film that reflects infrared light and transmits visible light on the outer surface or inner surface of the bulb, that is, an infrared reflecting film, has been developed. It is already on the market.
[0003]
  When an infrared reflecting film is formed on the surface of the bulb, the infrared reflecting film reflects the infrared rays emitted from the filament, and the reflected infrared rays are returned to the filament to reheat the filament. As a result, the electric energy supplied from the outside can be saved by the amount of energy returned to the filament, and the luminous efficiency is improved. In addition, since the release of heat that has been wasted is reduced, there is an advantage that the thermal influence on the appliances can be reduced.
[0004]
  In order to effectively utilize the action of such an infrared reflecting film, it is desired that the filament is at the center position of the bulb. That is, since the bulb has a spherical shape, an elliptical spherical shape, a cylindrical shape or the like, when an infrared reflecting film is formed on the bulb surface, the infrared rays reflected by the infrared reflecting film are returned to the central axis of the bulb. For this reason, if the coil axis | shaft is arrange | positioned on the center axis | shaft of a valve | bulb, infrared rays will be reliably returned to a filament. In this case, the infrared feedback rate is high.
[0005]
  By the way, when the bulb structure is a single-sealed lamp having a sealing portion only at one end portion, the pair of internal lead wires sealed to the sealing portion is the valve tip portion opposite to the sealing portion. If not fixed in the vicinity, the mount is cantilevered and the coil center axis of the filament may be displaced from the center axis of the bulb. In this case, the feedback rate at which infrared rays are returned to the filament is low.
[0006]
  For this reason, there are various techniques for positioning the coil central axis of the filament on the central axis of the valve by locking or fixing the vicinity of the valve tip opposite to the sealing portion of the internal lead wire to the valve. Has been developed.
[0007]
  For example, in Japanese Utility Model Laid-Open No. 59-109063 (prior art 1), the vicinity of the valve tip of the internal lead wire (first internal lead wire) led out to the valve tip side opposite to the filament sealing portion is disclosed. Is fixed to a ring-shaped member fixed in contact with the inner wall of the valve. As a result, the first internal lead is indirectly fixed to the valve inner wall. Moreover, in this prior art 1, the valve | bulb front end side of a filament is being fixed to the 1st internal lead wire via the light-shielding member, and is not being fixed directly to the internal lead wire.
[0008]
  In Japanese Utility Model Publication No. 59-121155 (prior art 2), the vicinity of the valve tip of the first internal lead wire is fixed to a coil member fixed in a narrow tube at the valve tip. Also in this prior art 2, as a result, the first internal lead wire is indirectly fixed although it is in the narrow tube. Further, in the prior art 2, the bulb tip end side of the filament is fixed to the first internal lead wire via the light shielding member, and is not directly fixed to the internal lead wire.
[0009]
  Furthermore, in Japanese Utility Model Laid-Open No. 58-103460 (prior art 3), the vicinity of the valve tip of the first internal lead wire is bent in a U shape, and the bent portion is embedded in the melted thin tube trace. It is fixed. The reason described as a trace is that it cannot be said that the tubule remains. The end portion on the tip side of the filament is fitted into the tip of the first internal lead wire, and is embedded and fixed in the trace of the narrow tube melted together with the first internal lead wire.
[0010]
[Problems to be solved by the invention]
  Each prior art has the following drawbacks. In the prior art 1, since the first internal lead wire does not directly fix the filament, the positioning accuracy of the filament is poor. Further, since the member for fixing the first internal lead wire is fixed to the inner wall of the bulb, the filament positioning accuracy is further deteriorated.
[0011]
  In the prior art 2, the positioning accuracy of the filament is improved because the member for fixing the first internal lead wire is fixed not in the inner wall of the valve but in the thin tube. Since the lead wire does not directly fix the filament, the filament positioning accuracy is not sufficient.
[0012]
  In the prior art 3, the first internal lead wire is buried and fixed in the melted capillary tube as well as the tip of the filament, so that the first internal lead wire is inclined at the time of melting and fixing, and the axial direction and the direction perpendicular to the axis It will slip out. This is a seal mark after the fine tube trace is normally used as an exhaust pipe. When the seal is cut, the exhaust pipe is melted and pulled to leave a fine tube trace. Or misalignment.
[0013]
  An object of the present invention is an incandescent lamp in which a filament can be correctly positioned on the central axis of a bulb in a single-sealed lamp, and the infrared light reflected by the infrared reflecting film is surely returned to the filament. And an illumination device using the same.
[0014]
[Means for Solving the Problems]
  The invention according to claim 1 has a bulging portion constituting a part of the surface of the spheroid having a pair of focal points in the middle portion, a central axis connecting the pair of focal points, and a sealing portion formed at one end. And a valve provided with a thin tube comprising a protruding portion and a cylindrical portion sealed on the center axis at the other end; a multi-coil filament accommodated in the valve, and a final coil shaft and both ends A filament in which the axis of the primary coil is arranged substantially along the central axis of the bulb; an infrared reflecting film formed on the bulb surface and reflecting the infrared rays emitted from the filament toward the inside of the bulb; Sealed and the other endInConnected to the filament end of the filamentA straight-shaped connecting part is formed.A locking portion that is bent so as to have at least one of a ring shape and a spiral shape and is inserted into the cylindrical portion of the thin tube, and is locked with a clearance from the top of the inner surface of the protruding portion of the thin tube YesThe locking portion is locked in the tube portion of the thin tube, and the connecting portion is disposed along the valve central axis.An incandescent lamp comprising: a first internal lead wire; a second internal lead wire having one end sealed to the sealing portion and the other end connected to the end portion on the sealing portion side of the filament. It is a light bulb.
[0015]
  The bulb shape includes a spheroid shape, a spheroid shape, and a spherical composite shape. Infrared radiation emitted from the vicinity of one focus returns to the vicinity of the other focus. Accordingly, the infrared feedback rate is higher than that of an incandescent bulb having a cylindrical bulb. On the other hand, in such a lamp, the reduction in the feedback rate when the filament is off the bulb axis is greater than when the cylindrical bulb is used. For this reason, the present invention is suitable for an incandescent bulb using a bulb having a bulging portion constituting a part of the surface of a spheroid having a pair of focal points at an intermediate portion in the axial direction of the bulb.
[0016]
  The multi-coil filament includes so-called double coil filaments and triple coil filaments. The final coil axis is a double coil coil axis if it is a double coil filament, and a triple coil axis if it is a triple coil filament.
[0017]
  The valve surface includes the case of an inner surface, an outer surface, and both surfaces. The infrared reflective film is usually composed of a multilayer interference film in which high refractive index layers and low refractive index layers are alternately stacked.
[0018]
  The narrow tube means that the other part of the valve has a thicker (larger diameter) portion than the thin tube, and is a thinner (smaller diameter) tube than that portion. A thin tube consists of the protrusion part and cylinder part which sealed the front-end | tip. In addition, the tube needs to be long enough to insert the locking portion, but may be short as long as it can be inserted. Therefore, you may form using the trace which cut off the exhaust pipe.
[0019]
  The first and second internal leads are not necessarily a single member. However, a single member is preferred. Since both the ring shape and the spiral shape are easily aligned with the central axis of the bulb, the design of arranging the filament on the central axis is easy, and the first internal lead wire is bent. Cheap.
[0020]
  Incandescent light bulbs include, but are not limited to, general light bulbs, halogen light bulbs, krypton light bulbs, and the like.
[0021]
  According to the first aspect of the invention, since the first internal lead wire to which the filament is connected is directly locked to the inner surface of the thin tube cylinder portion, the positioning accuracy of the first internal lead wire is high. The first internal lead wire is inserted and locked in the narrow tube, not in the thick portion of the bulb. Since it is easier to obtain the center of the thin portion than to obtain the center of the thick portion, the positioning accuracy of the first internal lead wire is improved by inserting and locking the first internal lead wire into the thin tube. . Furthermore, since the latching | locking part of a 1st internal lead wire is latched with the top part of the protrusion part inner surface of a thin tube, and it is not melt-fixed to an exhaust pipe sealing trace, when melt-fixing, There is no misalignment.
[0022]
  From the above three points, the positioning accuracy of the internal lead wire is high, and the filament fixed to the first internal lead wire is also accurately placed at the center of the bulb. As a result, the infrared feedback rate by the infrared reflecting film can be increased.
[0023]
  The invention according to claim 2 is characterized in that the engaging portion has a first engaging portion and a second engaging portion that are engaged with an inner wall of the thin tube that is axially spaced within the thin tube. The incandescent lamp according to Item 1.
[0024]
  Since the latching portions are the two locations of the first latching portion and the second latching portion that are separated in the axial direction, the tilting of the latching portion can be suppressed and the positioning of the filament is ensured.
[0025]
  According to a third aspect of the present invention, the engaging portion to be inserted into the thin tube has at least one of a ring shape and a spiral shape that are wound a plurality of times while being shifted in the axial direction. The incandescent lamp according to claim 1 or 2.
[0026]
  Since it is shifted in the axial direction and wound in a ring shape or a spiral shape a plurality of times, the inclination of the locking portion in the narrow tube can be suppressed. As a result, the filament positioning accuracy is further improved.
[0027]
  The invention of claim 4 is the incandescent lamp according to any one of claims 1 to 3, wherein the first internal lead wire is formed of a single wire.
[0028]
  Use of a single wire makes the structure extremely simple. Tungsten, molybdenum, etc. can be used as a single wire.
[0029]
  The invention of claim 5 is characterized in that the first internal lead wire is inserted into the primary coil portion of the end portion of the filament. This connection structure is simple, and since the primary coil portion of the end portion of the filament and the first internal lead wire are connected coaxially, the connection portion does not cause displacement of the filament.
[0030]
  The invention according to claim 6 is characterized in that the other end of the second internal lead wire is inserted and connected into a primary coil of the end portion on the sealing portion side of the filament. The incandescent light bulb described.
[0031]
  The end of the filament sealing part side is close to the sealing part, so that it is not easily displaced. The other end of the second internal lead wire is connected to the primary coil of the filament sealing part side end. By inserting and connecting in the filament, the filament can be positioned more reliably. The invention of claim 8 is characterized in that the inner diameter of the thin tube is 1.0 mm or more and 3.0 mm or less, and the element wire diameter of the first internal lead wire is 0.2 mm or more and 0.55 mm or less. The incandescent bulb according to any one of Items 1 to 6.
[0032]
  Since the inner diameter of the thin tube is set to 3.0 mm or less, the thin tube is not made too thick, and as a result, a large infrared reflecting surface formed other than the thin tube can be secured. Further, since the thin tube is not made too thick, it is easy to determine the center position. Further, since the narrow tube is 1.0 mm or more, the exhaust efficiency of the exhaust process is not hindered. That is, when the inner diameter of the narrow tube is less than 1.0 mm, the opening area as the exhaust tube is small, and the exhaust is inhibited, and the exhaust efficiency is lowered. Further, when the inner diameter of the soot tube exceeds 3.0 mm, the effective area for the infrared reflection of the bulb becomes small, and the center rings of the first locking portion and the second locking portion inserted therein vary. Therefore, the center ring of the filament central axis varies. Therefore, the inner diameter of the thin tube is preferably 1.0 mm or more and 3.0 mm or less.
[0033]
  Further, since the strand diameter of the internal lead wire is 0.2 mm or more and 0.55 mm or less, the original function as the internal lead wire can be achieved without blocking the thin tube. That is, the internal lead wire serves as a support for mechanically supporting the filament, and also serves as a path for current flow. Therefore, if the strand diameter of the internal lead wire is less than 0.2 mm, the mechanical strength becomes too weak to perform the support function, and it becomes a problem when a predetermined current flows. However, if the strand diameter of the internal lead wire exceeds 0.55 mm, the area occupied by the first locking portion and the second locking portion that are integrally formed with the inner lead wire and inserted into the narrow tube is reduced. The exhaust efficiency is reduced because the exhaust passage becomes larger and the exhaust passage is blocked. On the other hand, when the strand diameter of the internal lead wire exceeds 0.55 mm, bending processing becomes difficult and processing accuracy decreases, and it becomes difficult to make the central axis of the filament coincide with the central axis of the bulb. Therefore, the strand diameter of the internal lead wire is preferably 0.2 mm or more and 0.55 mm or less.
[0034]
  The invention of claim 8 is that a bead glass is provided between the sealing portion side end of the filament and the sealing portion, and that both the first and second internal lead wires penetrate the bead glass. The incandescent lamp according to any one of claims 1 to 7.
[0035]
  Since the bead glass is provided at a position closer to the filament than the sealing portion, the positioning of the second internal lead wire becomes more reliable. As a result, the positioning accuracy of the filament is improved. According to the ninth aspect of the present invention, a cylindrical portion is formed in the bulb at a position corresponding to a portion between the filament sealing portion side end and the bead glass, and the second internal lead wire is bent halfway to form the cylindrical portion. The incandescent lamp according to claim 8, further comprising a third locking portion that contacts and locks the inner surface.
[0036]
  Since the 3rd latching | locking part is formed in the position near a filament rather than bead glass, the position shift of a 2nd lead wire is further suppressed and the positioning accuracy of a filament improves further.
[0037]
  A tenth aspect of the invention includes the incandescent bulb according to any one of the first to ninth aspects; a dimmer incorporating the incandescent bulb and controlling light from the incandescent bulb. It is an illuminating device.
[0038]
  Examples of the illumination device include a general illumination device and a floodlight illumination device such as a vehicle headlamp. The light control body includes a reflecting mirror, a light diffusion lens, a light diffusion cover, and the like.
[0039]
  The invention of claim 10 can provide an illuminating device that takes advantage of the incandescent lamp of claims 1 to 9.
[0040]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0041]
  1 to 4 show a first embodiment of an incandescent light bulb according to the present invention, FIG. 1 is a front view in which a base is omitted, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. FIGS. 4A to 4D are explanatory views showing a manufacturing procedure of a mount used for the incandescent lamp shown in FIGS. 1 to 3, respectively.
[0042]
  The single-sealed halogen bulb 1 has an arc tube bulb 2 made of quartz glass. The arc tube bulb 2 has a crushing sealing portion 3 formed at one end, a cylindrical portion 4 is formed continuously with the sealing portion 3, and a bulging portion 5 having a spheroid surface is formed. The bulging portion 5 has a major axis in the sealing portion 3 and the opposite direction thereof, and the major axis direction is a valve center axis O1-O1. At the other end of the valve 2, a narrow tube 6 projects from the valve center axis O1-O1. The narrow tube 6 utilizes a protruding portion that is substantially left after sealing the exhaust pipe. As shown in FIG. 2, the narrow tube 6 has an inner diameter D of 1.0 mm or more and 3.0 mm or less, specifically 2.0 mm.
[0043]
  A visible light transmitting infrared reflecting film 7 is formed on the outer surface (or inner surface) of the bulb 2. Although not shown, the infrared reflecting film 7 is, for example, titanium oxide (TiO 2).₂), Tantalum oxide (Ta₂O_Five), Zirconium oxide (ZrO)₂), Zinc sulfide (ZnS), etc., and a high refractive index layer, and silicon oxide (Siri force = SiO₂), Magnesium fluoride (NgF)₂) And the like, for example, as a multilayer film having a total of 6 to 80 layers, and such an infrared reflection film 7 reflects infrared rays by multilayer interference action, but does not transmit visible light. There is a permeating effect. A filament 8 made of tungsten W is accommodated in the bulb 2. The filament 8 is composed of a double coil, and is arranged such that the coil axis O2-O2 of the secondary coil coincides with the valve center axis O1-O1. The filament 8 has a length substantially straddling the first focal point F1 and the second focal point F2 formed by the spheroidal surface of the bulb 2, and the end portion is disposed in the vicinity of the focal points F1 and F2. . Both ends of the filament 8 are arranged so that the primary coil portion coincides with the valve shaft O1-O1.
[0044]
  The filament 8 is installed between the first and second internal lead wires 10 and 11. These internal lead wires 10 and 11 have a wire diameter d2 of 0.2 mm or more and 0.55 mm or less, specifically 0.35 mm, respectively. The base end portions of these internal lead wires 10 and 11 are connected to metal foil conductors 12 and 13 made of molybdenum Mo or the like sealed on the crushing sealing portion 3, and the tip end portion is connected to the cylindrical portion 4 of the bulb 2. It is led to the bulging part 5 through. The pair of internal lead wires 10 and 11 are connected to each other by a bead glass 9 in the middle of the cylindrical portion 4, and the mutual interval is maintained.
[0045]
  The first internal lead wire 10 has an overhanging portion 10 a at a location located in the bulging portion 5. The first internal lead wire 10 has a first locking portion 10b and a second locking portion 10c that extend from the projecting portion 10a and are inserted into the thin tube 6, and are integrally separated from each other in the axial direction. ing. Furthermore, the first internal lead wire 10 has a straight filament connecting portion 10d extending along the valve center axis O1-O1 from the second locking portion 10c toward the crushing sealing portion 3. .
[0046]
  The first locking portion 10b inserted into the narrow tube 6 extends straight, but is in contact with the inner surface of the narrow tube 6 through a cylindrical portion at the entrance of the narrow tube 6 or through a small gap, When the internal lead wire 10 tries to incline, it abuts against the inner surface of the narrow tube 6 to prevent the inclination. The second locking portion 10c is inserted into the back of the narrow tube 6 that is axially spaced from the first locking portion 10b. In this embodiment, as shown in FIG. Yes. In other words, the second locking portion 10c is a spiral ring with a "" "shape, and is in contact with the inner surface of the thin tube 6 or is in contact with the inner surface of the thin tube 6 when displaced in the radial direction. Thus, the internal lead wire 10 is inserted into the narrow tube 6 through a gap that prevents the inclination of the internal lead wire 10. In this case, as shown in FIG. 2, the outer diameter d1 of the second locking portion 10c is 0.8 mm or more and 2.8 mm or less, and is designed according to the diameter of the thin tube.
[0047]
  The second internal lead wire 11 has a straight filament connecting portion 11a extending along the valve central axis O1-O1 in the direction of the thin tube 6.
[0048]
  The filament 8 has primary coil legs 8a and 8b at both ends. These leg portions 8 a and 8 b are inserted into the straight filament connecting portions 10 c and 11 a of the internal lead wires 10 and 11, and the entire filament 8 is installed on the internal lead wires 10 and 11.
[0049]
  Since the straight filament connecting portions 10d and 11a of the internal lead wires 10 and 11 extend along the valve center axis O1-O1, respectively, the filament 8 connected thereto has the coil axis O2-O2 connected to the valve. Arranged so as to coincide with the central axis O1-O1.
[0050]
  The mount supporting the filament 8 is manufactured by the procedure shown in FIG. That is, a tungsten wire to be a lead wire is formed as shown in FIG. 4A to make a semi-finished product of a pair of internal lead wires. This molded product is a semi-finished product such that one wire is continuously written as a single stroke, and includes a protruding portion 10a, a straight first locking portion 10b, and a spiral ring-shaped second locking portion. 10c, a straight filament connecting portion 10d, and another straight filament connecting portion 11a.
[0051]
  In such a semi-finished product, as shown in FIG.
[0052]
  Thereafter, as shown in FIG. 4C, the filament attachment portion is cut, whereby a pair of internal lead wires 10 and 11 are obtained.
[0053]
  Therefore, as shown in FIG. 4D, if the filament 8 is connected between the filament connecting portions 10d and 11a, the mount is completed.
[0054]
  Note that a halogen gas is sealed in the bulb 2.
[0055]
  Further, external lead wires 14 and 15 are connected to the metal foil conductors 12 and 13 made of molybdenum Mo or the like sealed on the crushing sealing portion 3.
[0056]
  And the crushing sealing part 3 of the valve | bulb 2 is joined to the ceramic insulating base 16 shown in FIG. The insulating base 16 includes a screw cap 18 andAndAn external terminal 19 is provided, and the external lead wires 14 and 15 are connected to the screw-type base 18 and the external terminal 19.
[0057]
  The degree of difference in the accuracy of the filament position between the incandescent bulb and the bulbs of the conventional techniques 1 to 3 was measured. If the deviation between the coil axis O 2 -O 2 and the valve center axis O 1 -O 1 is within ¼ of the coil outer diameter OSD of the filament 8, the ratio of the infrared rays reflected by the infrared reflecting film 7 returning to the filament 8 is kept high. Therefore, a non-defective product was determined if the difference between the two was less than this value, and a product exceeding 1/4 · OSD was determined to be a defective product. Although the embodiments of the present invention and the prior art differ in many configurations, the corresponding configurations, for example, the thickness of the lead wire and the length of the filament, are 20 samples each in accordance with the embodiment of the present invention. Produced and measured.
[Table 1]

[0058]
  From the above results, it can be understood that the present invention can accurately position the filament 8. The cause of the defect of the prior art 1 is that the filament is not directly fixed to the member that is supported by the light shielding member or the like and positioned on the central axis. Further, in the prior art 1, since the member positioned on the central axis is a thin wire and the wire extends from the inner wall of the bulb to support the weight of the filament, the wire is easily bent or deformed. It is the cause of the defect.
[0059]
  In the prior art 2, as in the prior art 1, the failure is that the filament is not directly fixed to the member that is supported on the light shielding member or the like and positioned on the central axis.
[0060]
  In the prior art 3, when the exhaust pipe is sealed off, the filament support member is shifted to the side or tilted.
[0061]
  FIG. 5 is a front view having a partial cross section of an illuminating device in which the halogen bulb of FIGS. 1 to 3 is combined with a reflecting mirror. The halogen bulb 1 is accommodated in the reflector 20. The reflector 20 has a reflector 22 on which a reflecting surface 21 is formed, and a base 23 made of ceramic or the like is joined to the reflector 22. The base 23 is provided with a screw-type base 24 and an external terminal 25, and is connected to a power source through the screw-type base 24 and the external terminal 25.
[0062]
  When the halogen bulb 1 housed in such a reflector 20 is turned on, the visible light that has passed through the bulb 2 and the infrared reflecting film 7 is reflected by the reflecting surface 21 and irradiates the front from the front opening of the reflector 22. . In this case, the infrared rays are returned into the bulb 2 by the infrared reflecting film 7, so that they do not reach the reflector 22, the temperature rise of the reflector 22 is prevented, and the infrared rays are not irradiated in front of the reflector 22 and are visible to dislike the temperature rise. Effective for light irradiation.
[0063]
  According to such a reflective illumination device, the efficiency of the halogen bulb 1 is improved, so that the advantages can be utilized and the illumination device is highly efficient.
[0064]
  In the case of a dichroic mirror in which the reflection surface of the reflector 22 is coated with a visible light reflecting infrared transmission film (not shown), the temperature rise of the irradiation surface can be further suppressed.
[0065]
  FIG. 6 is a front view showing a second embodiment of the incandescent lamp of the present invention. In the second embodiment, the size of the cylindrical portion of the narrow tube 6a formed at the other end of the valve 2 is larger than that of the exhaust tube 6b, but smaller than the bulging portion 5, and is inserted into this narrow tube 6a. The diameter of the ring shape as the second locking portion 10c is increased.
[0066]
  In this way, if the diameter of the ring-shaped second locking portion 10c is increased to an extent that does not hinder, the mechanical strength for supporting the filament 8 can be increased without impairing the centering accuracy.
[0067]
  FIG. 7 is a front view showing a third embodiment of the incandescent bulb of the present invention. In 3rd Embodiment, the 1st latching | locking part 10b and the 2nd latching | locking part 10c show the example comprised by the ring part or spiral part of the multiple turns formed along the axial direction, and at least By inserting a ring portion or a spiral portion of two or more turns into the narrow tube 6, the ring portion at the entrance becomes the first locking portion 10b, and the ring portion at the back becomes the second locking portion 10c. And is locked to the narrow tube 6.
[0068]
  FIG. 8 is a front view showing a fourth embodiment of the incandescent bulb of the present invention. In 4th Embodiment, the 1st and 2nd latching | locking part 10b, 10c is bent by the waveform, the waveform part of an inlet_port | entrance becomes the 1st latching | locking part 10b, and the waveform part of the back part is 1st. The second locking portion 10c is inserted into the narrow tube 6.
[0069]
  FIG. 9 is a front view showing a fifth embodiment of the incandescent lamp of the present invention. In the fifth embodiment, the first locking portion 10b and the second locking portion 10c are formed on one lead wire 10, and the first and second locking portions 10b and 10c are formed in the thin tube 6. While being inserted, the other lead wire 11 is formed with, for example, a ring portion or a spiral portion that becomes the third locking portion 11 b inserted into the cylindrical portion 4.
[0070]
  FIG. 10 is a front view showing a sixth embodiment of the incandescent lamp of the present invention. In the sixth embodiment, bent protrusions 10e and 11c are formed on the proximal end sides of the pair of lead wires 10 and 11 so as to come into contact with the inner surface of the cylindrical portion 4 and regulate the position. The protruding portions 10e and 11c constitute a third locking portion.
[0071]
  By doing so, the centers of both the pair of lead wires 10 and 11 are regulated, so that the filament 8 can be favorably held on the valve center axis.
[0072]
  FIG. 11 is a partially enlarged view showing, in an enlarged manner, the deformation mode of the filament connection portion of the incandescent lamp of the present invention. In this modification, corrugated portions 105 are formed on the first and second lead wires 10 and 11 in succession to the filament connecting portions 10d and 11a, respectively (only the corrugated portion 105 of the lead wire 10 is shown on one side. The leg portion 8a of the filament 8 is inserted into the corrugated portion 10d. In this way, the movement of the leg portion 8a of the filament 8 is prevented by the corrugated portion 105, so that the movement of the filament 8 is prevented and the support of the filament 8 is ensured.
[0073]
【The invention's effect】
  According to the first aspect of the invention, since the first internal lead wire to which the filament is connected is directly locked to the inner surface of the thin tube, the positioning accuracy of the first internal lead wire is high. The first internal lead wire is inserted and locked in the narrow tube, not in the thick portion of the bulb. Since it is easier to obtain the center of the thin portion than to obtain the center of the thick portion, the positioning accuracy of the first internal lead wire is improved by inserting and locking the first internal lead wire into the thin tube. . Further, since the locking portion of the first internal lead wire is not melt-fixed to the exhaust pipe sealing trace, there is no position shift at the time of melt-fixing.
[0074]
  From the above three points, the positioning accuracy of the internal lead wire is high, and the filament fixed to the first internal lead wire is also accurately placed at the center of the bulb. As a result, the infrared feedback rate by the infrared reflecting film can be increased.
[0075]
  As a result, an incandescent bulb with high lamp efficiency can be obtained without reducing the return rate of infrared rays to the filament.
[0076]
  In particular, in the ring shape and the spiral shape, the center of the ring or the spiral is easy to coincide with the central axis of the bulb, so that it is easy to design the filament on the central axis, and the first internal lead wire can be bent. It's easy to do. Therefore, it can be manufactured at low cost.
[0077]
  In addition, the infrared radiation radiated from the vicinity of one focal point surely returns to the vicinity of the other focal point, so that the infrared feedback rate is higher than that of an incandescent bulb having a cylindrical bulb, and an incandescent bulb with high lamp efficiency can be obtained. it can.
[0078]
  According to the second aspect of the present invention, since the locking portion is the two positions of the first locking portion and the second locking portion that are separated in the axial direction, the inclination of the locking portion can be suppressed, and the filament can be positioned reliably. become. As a result, an incandescent bulb with high lamp efficiency can be obtained without reducing the return rate of infrared rays to the filament.
[0079]
  Claim3According to this invention, since it is wound in a ring shape or a spiral shape a plurality of times shifted in the axial direction, the inclination of the locking portion in the narrow tube can be suppressed. As a result, the positioning accuracy of the filament is further improved, and an incandescent bulb with high infrared feedback to the filament and high lamp efficiency can be obtained.
[0080]
  Claim4According to this invention, the structure becomes extremely simple by using a single wire. Therefore, manufacture is easy and it can manufacture at low cost.
[0081]
  Claim5According to the invention, the first internal lead wire is fitted and inserted into the primary coil portion of the end of the filament, so that both are connected and fixed, so the structure is simple and the primary coil of the end of the filament Since the portion and the first internal lead wire are connected coaxially, the displacement of the filament in this connection portion is small.
[0082]
  Claim6According to this invention, the other end of the second internal lead wire is inserted and connected into the primary coil of the filament sealing portion side end portion, thereby further ensuring the positioning of the filament. As a result, a reduction in the return rate of infrared rays to the filament can be more reliably suppressed, and an incandescent bulb with high lamp efficiency can be obtained.
[0083]
  Claim7According to this invention, a large infrared reflecting surface can be secured, and the position of the filament can be easily determined on the axis. As a result, a reduction in the return rate of infrared rays to the filament can be suppressed, and an incandescent bulb with high lamp efficiency can be obtained. In addition, manufacturing obstacles can be suppressed.
[0084]
  Claim8According to this invention, since the bead glass is provided at a position closer to the filament than the sealing portion, the positioning of the second internal lead wire becomes more reliable. As a result, the filament positioning accuracy is improved, the reduction of the infrared feedback rate can be suppressed, and an incandescent lamp with high lamp efficiency can be obtained.
[0085]
  Claim9According to this invention, since the 3rd latching | locking part is formed in the position near a filament rather than bead glass, the position shift of a 2nd lead wire is further suppressed and the positioning accuracy of a filament improves further. . As a result, a decrease in the infrared feedback rate can be suppressed, and an incandescent bulb with high lamp efficiency can be obtained.
[0086]
  Claim10According to the present invention, claims 1 to9It is possible to provide an illuminating device that takes advantage of the incandescent light bulb described in 1. above.
[Brief description of the drawings]
FIG. 1 is a front view of a first embodiment of an incandescent light bulb according to the present invention, in which a base portion is omitted.
FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
FIG. 3 is a perspective view in which a base portion is added to FIG. 1;
FIGS. 4A to 4D are explanatory views showing a method for manufacturing a mount. FIGS.
FIG. 5 is a cross-sectional view of a reflective illumination device using the halogen bulb shown in FIGS. 1 to 3 as a light source.
FIG. 6 is a front view showing a second embodiment of the incandescent lamp of the present invention.
FIG. 7 is a front view showing a third embodiment of the incandescent bulb of the present invention.
FIG. 8 is a front view showing a fourth embodiment of the incandescent bulb of the present invention.
FIG. 9 is a front view showing a fifth embodiment of the incandescent bulb of the present invention.
FIG. 10 is a front view showing a sixth embodiment of the incandescent bulb of the present invention.
FIG. 11 is a partially enlarged view showing, in an enlarged manner, a deformation mode of the filament connecting portion of the incandescent lamp of the present invention.
[Explanation of symbols]
1 ... Halogen bulb 2 ... Bulb
3 ... Sealing capital 4 ... Cylindrical part
5 ... bulge 6 ... capillary
7 ... Infrared reflective film 8 ... Filament
10 ... first internal lead wire 11 ... second internal lead wire
10b ... 1st latching | locking part 10c ... 2nd latching | locking part
20 ... Reflector 22 ... Reflector
11b ... 3rd latching | locking part

Claims (10)

It has a bulging part that constitutes a part of the surface of the spheroid having a pair of focal points in the middle part, a central axis that connects the pair of focal points, a sealing part is formed at one end, and the center at the other end A valve provided with a thin tube comprising a protruding portion and a cylindrical portion whose tip is sealed on a shaft;
A multi-coil filament housed in the bulb, wherein the final coil axis and the primary coil axis at both ends are arranged substantially along the valve central axis;
An infrared reflecting film formed on the surface of the bulb and reflecting infrared rays emitted from the filament toward the bulb;
End joint line portion of the straight shape that will be connected to the capillary end of the filament to the other end while being sealed is formed in the sealing portion, the middle has a ring shape, at least one shape of a spiral-shaped is bent to be inserted into the cylindrical portion of the capillary tube, and have a locking part for locking with the top and the gap of the projecting portion the inner surface of the capillary tube, engaging the locking portion into the cylindrical portion of the capillary A first internal lead wire with the connecting portion disposed along the central axis of the valve ;
A second internal lead wire having one end sealed to the sealing portion and the other end connected to the filament-side sealing portion end;
An incandescent bulb characterized by comprising:   The incandescent light bulb according to claim 1, wherein the engaging portion includes a first engaging portion and a second engaging portion that are engaged with an inner wall of the thin tube that is spaced apart in the axial direction in the thin tube. .   The locking portion inserted into the thin tube has at least one of a ring shape and a spiral shape that are wound a plurality of times while being shifted in the axial direction. Or the incandescent lamp of 2.   The incandescent lamp according to any one of claims 1 to 3, wherein the first internal lead wire is composed of a single wire.   The incandescent lamp according to any one of claims 1 to 4, wherein the first internal lead wire is inserted and connected into a primary coil of the filament.   The incandescent lamp according to any one of claims 1 to 5, wherein the other end of the second internal lead wire is inserted into and connected to a primary coil of the end portion on the sealing portion side of the filament.   7. An inner diameter of a tubular portion of the thin tube is set to 1.0 mm or more and 3.0 mm or less, and a strand diameter of the first internal lead wire is set to 0.2 mm or more and 0.55 mm or less. An incandescent bulb according to any one of the above.   The bead glass is provided between the sealing portion side end of the filament and the sealing portion, and both the first and second internal lead wires penetrate the bead glass. The incandescent light bulb according to any one of 7 above.   A cylindrical portion is formed on the bulb at a position corresponding to the gap between the filament sealing portion side end and the bead glass, and the second internal lead wire is bent halfway to contact and lock the inner surface of the cylindrical portion. The incandescent light bulb according to claim 8, comprising three locking portions.   An incandescent lamp according to any one of claims 1 to 9, and a light control body that incorporates the incandescent lamp and controls light from the incandescent lamp.

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