200834648 九、發明說明： 【發明所屬之技術領域】 本發明涉及一種如申請專利範圍第1項前言所述之低 電壓鹵素白熾燈。 【先前技術】 此種低電壓鹵素白熾燈例如已描述在歐斯朗公司 (〇SRAM GmbH)之網際網路www.osram.de中之產品名稱 Halo star®中且例如用在點照明，天花板嵌入式照明和可撓 性的光系統中。此種低電壓鹵素白熾燈具有一種較佳是由 石英玻璃所構成的燈管，燈管上藉由一種節流墊圏而形成 一基座，其可插入至一種燈頭中。燈管中配置著一發光體 ，其例如可單一地或雙重地形成螺旋狀。燈絲之末端用作 內部的電流引線，其熔合在該節流墊圈中且在該處與由鉬 構成的密封膜相焊接。膜的外端上焊接著外部的電流引線 ，其向外而由該節流墊圈突出。藉由已熔合的薄膜，則可 確保該燈管的內部空間可達成一種真空的密封。燈管中以 一種含有鹵素添加物的塡充氣體來塡入。 上述之低電壓鹵素白熾燈設計成以較低的功率（例如 ，24伏特，1 5安培）來渾作。在一些應用情況下’例如， 在有效照明或該燈包含很小的光點/發光場時，上述之低電 壓鹵素白熾燈需要較高的點燃功率（例如，2 4伏/1 0 0 0瓦） 。在此種應用中，若使用傳統之具有密封膜之構造’則會 由於高的電流強度（5 0安培）而使該構造過熱或甚至熔化’ 致使該燈的壽命很短。 -5- 200834648 【發明内容】 本發明的目的是提供一種低電壓燈，其亦可用在高電 流或中等電流領域中。 ' 上述目的藉由申請專利範圍第1項之特徵來達成。 本發明特別有利的形式描述在申請專利範圍各附屬項 中〇 申請專利範圍第1項之低電壓鹵素白熾燈具有一個燈 管’其容納一個發光體且塡充著一種塡充氣體。該發光體 之電流供應是經由電流引線來達成，電流引線在本發明中 是金屬棒’較佳是鎢棒，其熔合至燈管的末端區段中。 依據本發明，密封膜已不需要且使用棒形熔合區而將 電流導引至燈管中，此時較佳是使用鎢棒。 爲了對基本上由石英玻璃所構成的燈管和金屬棒（較 ί圭是鎢棒）之不同的熱膨脹係數進行補償，則金屬棒在熔化 之前可設置一種由適當的熔化玻璃所構成的玻璃層。 設有一玻璃層的金屬棒可經由一種底面內部而與燈管 相熔合。 金屬棒和該底面內部之間的過渡區或金屬棒和燈管之 間的過渡區可由多種玻璃所構成，其膨脹係數依據金屬棒 材料和燈管材料來調整，使金屬棒/鎢棒之幾何變化量可藉 由該燈操作時之溫度變換而由玻璃所吸收。 在一實施例中，底面內部是以一種流動珠或熔合珠來 形成，藉此可使該底面內部與該燈管的底面相熔合。 如上所述，燈絲配置可以單圈或雙圈方式捲撓而成。 在一實施例中，該低電壓鹵素白熾燈在二側設有基座 -6- 200834648 。在此種形式中，使用一種燈頭系統，其將電流引線由一 底面部延伸至另一底面部，因此實際上可形成一種單側的 基座。 當燈管具有圓形或卵形的橫切面時，燈管的構造特別 簡單。 當該燈設有一種IRC塗層時，該燈能以省能量的方式 來驅動。 本發明的燈較佳是在功率大於5 00瓦時操作。 本發明以下將依據一較佳的實施形式來說明。 【實施方式】 第1圖顯示一種高電流之低電壓鹵素白熾燈1之已簡 化的側視圖，其以一種棒形熔合形式來形成。本實施例中 ，此低電壓鹵素白熾燈1基本上以二側具有基座的旋轉對 稱的形式來形成。燈管2是由一種大約是圓柱形的燈泡來 开夕成’其正側設有二個基座4，6。在一種由燈管2所圍繞 的內部區8中容納一發光體1 〇 ’其形成一種在軸向中延伸 的單一燈絲。該發光體1 〇的二個末端區段分別與一電流引 線1 2，1 4相焊接著，各電流引線同樣在軸向中延伸且其位 於外部的末端區段由基座4，6中以真空密封的方式伸出。 此二條作爲燈絲支件的電流引線1 2，1 4和發光體丨0較佳 是由鎢或鎢合金所製成。在本實施例中，使用鎢棒作爲電 流引線1 2，1 4。鎢棒（電流引線1 2，1 4)之直徑依據最大之 燈操作電流來設定。鎢棒之表面受到硏磨且藉由加熱而預 先氧化至大約2 0 0 0。C之溫度。然後，由熔合玻璃所構成的 玻璃棒以螺旋形的形式經由一預設的長度而熔合在該鎢棒 200834648 上，以便在該鎢棒上形成一種具有黏性的中間層。此中間 層在圖1中以參考符號1 6來表示。在該鎢棒（電流引線1 2 ，14)之中間層16上熔合一種底面內部18或20，其圍繞在 該電流引線1 2或1 4之一部份區段的周圍。該底面內部1 8 ，20分別具有一已熔合的熔合珠22，24(亦稱爲Dom)，該 底面內部1 8或20沿著該熔合珠而與該圓柱形的燈管2相 熔合。爲了承受大的機械負載和熱負載，可在至該中間層 1 4，1 6或至燈管2之過渡區中形成由不同種類的玻璃所構 成的底面內部1 8，20，使鎢棒在燈操作時由於溫度變換所 造成的幾何形式的變化可被吸收。 在製造該低電壓鹵素白熾燈1時，該二條電流引線1 2 ，14首先須設有中間層14或16且與底面內部18或20相 熔合，電流引線1 2，1 4之互相面對的末端區段須與燈絲（ 發光體10)相焊接。珠22，24之外直徑因此小於該燈管2 之內直徑。預製成的單元然後插入至該燈管2中且隨後使 該二個底面內部18，20沿著各珠22，24而與燈管2相熔 合，於是該內部空間8之正側即可形成真空密封狀態。在 隨後的過程中可藉由泵桿以習知的方式將一種設有鹵素添 加物的稀有氣體塡入至該內部空間8中。 上述以最簡單的方式來構成、且能以技術上的較少的 耗費來製成的低電壓鹵素白熾燈亦可操作在大於25安培 之較大的操作電流中且因此須考慮傳統的解法。當然，亦 可使用其它的幾何形式的燈管來取代圓柱形的燈管2。在 燈絲較不穩定或較長時，亦可使用壓擠粒結技術來固定該 燈絲。 -8- 200834648 在上述的實施例中，該燈在二側設有基座。當然，該 燈在原理上亦可依據相同的構造原理在單側設有基座。本 文開頭所述的解法亦可將另一種燈頭系統轉用在單側設有 基座之燈用的燈頭中。在此種燈頭系統中，該電流引線在 一側上藉由一電流引線之延長而導引至另一電流引線，使 所示的燈可用在單側設有基座之燈用的傳統燈頭中。可提 供該另一種燈頭系統以作爲配件，其藉由插接或扣接而設 定在該燈管的末端區段上或設定在該處已存在的電流引線 上。 已揭示一種低電壓鹵素白熾燈，其具有一種圍繞一燈 絲配置的燈管，該燈管中以一種含有鹵素添加物的塡充氣 體來塡入’電流引線由該燈管中以保持著真空密封的方式 而伸出。各電流引線以金屬棒來構成，其熔合在該燈管之 末端區段中。 【圖式簡單說明】 第1圖係本發明之低電壓鹵素白熾燈之已簡化的側視 圖。 【主要元件符號說明】 1 低電壓鹵素白熾燈 2 燈管 4 基座 6 基座 8 內部空間 10 發光體 -9- 200834648 12 電流引線 14 電流引線 16 中間層 18，20 底面內部 -10-BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low voltage halogen incandescent lamp as described in the preamble of claim 1. [Prior Art] Such a low-voltage halogen incandescent lamp has been described, for example, in the product name Halo star® in the Internet of www.osram.de of 〇SRAM GmbH and is used, for example, for point illumination, ceiling embedding Lighting and flexible light systems. Such a low voltage halogen incandescent lamp has a lamp tube preferably constructed of quartz glass, and the lamp tube is formed by a throttle pad to form a base which can be inserted into a lamp cap. An illuminant is arranged in the lamp tube, which can be formed, for example, in a spiral shape, either singly or double. The end of the filament serves as an internal current lead that is fused in the throttling washer where it is welded to a sealing film composed of molybdenum. An outer current lead is welded to the outer end of the membrane, which is outwardly protruded by the throttle washer. By means of the fused film, it is ensured that the inner space of the tube achieves a vacuum seal. The tube is infused with a sputum inflatable body containing a halogen additive. The low voltage halogen incandescent lamps described above are designed to operate at lower power (e.g., 24 volts, 15 amps). In some applications, for example, a low voltage halogen incandescent lamp requires a higher ignition power (eg, 24 volts per 100 watts) when the illumination is effectively illuminated or the lamp contains a small spot/illumination field. ). In such an application, if a conventional construction having a sealing film is used, the structure is overheated or even melted due to high current intensity (50 amps), resulting in a short life of the lamp. SUMMARY OF THE INVENTION It is an object of the invention to provide a low voltage lamp that can also be used in the field of high current or medium current. 'The above objectives are achieved by applying the features of item 1 of the patent scope. A particularly advantageous form of the invention is described in the appended claims. The low voltage halogen incandescent lamp of claim 1 has a lamp' which houses an illuminator and is filled with a sputum inflatable body. The current supply to the illuminator is achieved via a current lead, which in the present invention is a metal rod 'preferably a tungsten rod that fuses into the end section of the tube. According to the present invention, the sealing film is not required and a rod-shaped fusion zone is used to guide the current into the tube, in which case a tungsten rod is preferably used. In order to compensate for the different coefficients of thermal expansion of a lamp tube and a metal rod (generally a tungsten rod) consisting essentially of quartz glass, the metal rod may be provided with a glass layer of suitable molten glass prior to melting. . A metal rod provided with a glass layer can be fused to the tube via a bottom surface. The transition zone between the metal bar and the inside of the bottom surface or the transition zone between the metal bar and the lamp tube may be composed of a plurality of glasses, and the expansion coefficient thereof is adjusted according to the material of the metal bar and the material of the lamp tube, so that the geometry of the metal bar/tungsten rod The amount of change can be absorbed by the glass by the temperature change during operation of the lamp. In one embodiment, the interior of the bottom surface is formed by a flow bead or fusing bead whereby the interior of the bottom surface can be fused to the bottom surface of the tube. As described above, the filament configuration can be formed by winding in a single or double circle manner. In one embodiment, the low voltage halogen incandescent lamp is provided with a pedestal -6-200834648 on both sides. In this form, a base system is used which extends the current lead from one bottom portion to the other, thereby actually forming a one-sided base. The construction of the tube is particularly simple when the tube has a circular or oval cross section. When the lamp is provided with an IRC coating, the lamp can be driven in an energy efficient manner. The lamp of the present invention is preferably operated at powers greater than 500 watts. The invention will now be described in terms of a preferred embodiment. [Embodiment] Fig. 1 shows a simplified side view of a high current low voltage halogen incandescent lamp 1 which is formed in a rod-shaped fusion form. In the present embodiment, the low voltage halogen incandescent lamp 1 is basically formed in the form of a rotational symmetry having a pedestal on both sides. The bulb 2 is made up of a bulb having an approximately cylindrical shape, and its base is provided with two pedestals 4, 6. An illuminant 1 〇 ' is housed in an inner region 8 surrounded by the tube 2 to form a single filament extending in the axial direction. The two end sections of the illuminant 1 分别 are respectively soldered to a current lead 12 2, 14 , and each current lead also extends in the axial direction and its outer end section is provided by the pedestal 4 , 6 Extend in a vacuum-tight manner. The two current leads 1 2, 14 and the illuminator 丨 0 as the filament support are preferably made of tungsten or a tungsten alloy. In this embodiment, a tungsten rod is used as the current lead 12 2,14. The diameter of the tungsten rod (current leads 1 2, 14) is set according to the maximum lamp operating current. The surface of the tungsten rod is honed and pre-oxidized to about 20,000 by heating. The temperature of C. Then, a glass rod composed of fused glass is fused in a spiral form to the tungsten rod 200834648 via a predetermined length to form a viscous intermediate layer on the tungsten rod. This intermediate layer is indicated by reference numeral 16 in Fig. 1. A bottom surface interior 18 or 20 is fused to the intermediate layer 16 of the tungsten rod (current leads 12, 14) which surrounds a portion of the current lead 12 or 14. The bottom interiors 18, 20 each have a fused fusion bead 22, 24 (also known as a Dom) which is fused to the cylindrical bulb 2 along the fused bead. In order to withstand large mechanical loads and thermal loads, a bottom surface 18,20 of different kinds of glass may be formed in the transition zone to the intermediate layer 14 or 16 or to the tube 2, so that the tungsten rod is Changes in the geometry due to temperature changes during lamp operation can be absorbed. In the manufacture of the low-voltage halogen incandescent lamp 1, the two current leads 1 2 , 14 must first be provided with an intermediate layer 14 or 16 and fused with the bottom surface 18 or 20, and the current leads 1 2, 1 4 face each other. The end section must be welded to the filament (illuminant 10). The outer diameter of the beads 22, 24 is therefore smaller than the inner diameter of the tube 2. The prefabricated unit is then inserted into the tube 2 and the two bottom surfaces 18, 20 are then fused to the tube 2 along the beads 22, 24 so that the positive side of the interior space 8 is formed. Vacuum sealed. In the subsequent process, a rare gas provided with a halogen additive can be introduced into the internal space 8 by a pump rod in a conventional manner. The low voltage halogen incandescent lamps constructed in the simplest manner and which can be produced with less technical effort can also be operated in larger operating currents greater than 25 amps and therefore conventional solutions must be considered. Of course, other geometrical forms of lamps can be used instead of the cylindrical tube 2. When the filament is unstable or long, the filament bonding technique can also be used to fix the filament. -8- 200834648 In the above embodiment, the lamp is provided with a base on both sides. Of course, the lamp can also be provided with a base on one side in principle according to the same construction principle. The solution described at the beginning of this article can also be used to switch another lamp base system to a lamp head for a lamp with a base on one side. In such a base system, the current lead is guided on one side to the other current lead by extension of a current lead, so that the lamp shown can be used in a conventional base for a lamp with a base on one side. . The other base system can be provided as an accessory that is either inserted or snapped onto the end section of the tube or is set to a current lead that is already present there. A low voltage halogen incandescent lamp has been disclosed having a lamp disposed around a filament in which a ruthenium gas containing a halogen additive is inserted into the 'current lead from the tube to maintain a vacuum seal Out of the way. Each current lead is constructed of a metal rod that is fused in the end section of the tube. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a simplified side elevational view of a low voltage halogen incandescent lamp of the present invention. [Main component symbol description] 1 Low-voltage halogen incandescent lamp 2 Lamp tube 4 Base 6 Base 8 Internal space 10 Luminous body -9- 200834648 12 Current lead 14 Current lead 16 Intermediate layer 18,20 Bottom inside -10-