WO2009092497A1 - Discharge vessel for a discharge lamp and discharge lamp having such a discharge vessel - Google Patents

Abstract

The invention relates to a discharge vessel (1) for a discharge lamp, comprising a first curved vessel part (6) and a second curved vessel part (4), which are connected to a connecting piece (6) at the free ends (15, 16), wherein the connecting piece comprises a first partial region (13) with a first arc-shaped curve and a second partial region (14) with a second arc-shaped curve. The invention further relates to a discharge lamp having such a discharge vessel.

Description

 Confession

Discharge vessel for a discharge lamp and Entla ^¬ tion lamp with such a discharge vessel

Technical area

The invention relates to a discharge vessel for a Ent ^¬ discharge lamp having a first curved vessel part and a second curved vessel part, which are connected at free ends with a connector. Furthermore, the invention relates to a discharge lamp with such a discharge vessel.

State of the art

From DE 10 2004 018 104 Al a discharge lamp with a helically shaped discharge vessel is known. The discharge vessel is formed from two likewise helical vessel parts, which are guided into one another and are connected at free ends. The geometry of the container parts in particular at the free ends to which they are connected, the connection piece is curved ^¬ straight or only slightly. The transitions in the connection area are therefore not continuous and the interior design at this connection area has steps or edges. As a result, the clamping with a protective layer, for example an AlonC layer, and a phosphor layer can be made more difficult. In a cross-sectional constriction caused at a junction of the vessel parts, therefore, it may be difficult to entrap these layers, whereby the application of the layers at this point to undesired thickness, For example, too much or too little leads. In addition, by such a configuration, the mechanical stability of the discharge vessel may be impaired at the connection area.

Presentation of the invention

It is an object of the present invention to provide a discharge vessel for a discharge lamp and such a discharge lamp, in which or in which the vessel geometry in the region of the connection of the two vessel parts can be improved. In particular, this should be done with regard to a less problematic subsequent flocking of the inside with layered materials.

This object is achieved by a discharge vessel, which has the features of claim 1, and a discharge lamp, which has the features of claim 10, ge ^¬ triggers.

An inventive discharge vessel for a Entla ^{pressure discharge} lamp has a first, at least partially ge ^¬ curved-vessel part and a second, at least partially curved vessel part, wherein the are two vascular ^¬ parts at their free ends with a connector connected. This allows the continuous ^discharge vessel is provided. The connecting piece has a first portion with a first arcuate curvature and a second portion with a second arcuate curvature. Through this geometry of the connector, the connection of the two vessel parts be improved so that the inside cross- ^sectional constrictions can be avoided.

Preferably, the arcuate curvatures of the two portions of the connector have opposite directions of curvature. Especially when the two container parts are guided in one another and the free ends are arranged ge ^¬ genüberliegend, a binding region optimized connection with a view to avoiding a cross-sectional constriction in comparison can be made possible by this specifi ^¬ specific shaping of the connecting piece.

Preferably, the two portions of the Verbin ^¬ extension piece are arranged adjacent to one another. The bo ^¬ genförmigen curvatures go thus in particular continuously into one another, thus the direction of curvature processing smoothly and continuously from one to the other passes. As a result, a stepped area in the connector can be avoided.

Particularly preferably, it has proven when the bogenförmi ^¬ gen curvatures of the partial regions have a same radius, so that the portions of the ^¬ are quasi analogous zueinan formed, but extend in opposite directions. This symmetrical design of the connecting piece, the particularly before ^¬ ferred connection to the free ends of the container parts can be light enable, when these have at least in the area of connection with the connecting piece of the same geometry and are guided at least in one another.

A particularly preferred embodiment of the connection piece ^¬ is given by an S-shape, in particular realized a symmetrical S-shape. Just then, though the two vessel parts are designed to be analogous in terms of their geometry and design and are guided into one another by their ge ^¬ curved design, fertilization can be particularly optimized by this shape of the connector and designed in view of the Vermei ^¬ tion of a cross-sectional minimization.

Preferably, the connection points of the connecting piece ^¬ with the free ends of the container parts are formed completely continuously. There is thus no kink and no bottleneck in the interior of the connection area and thus no cross-section reduction realized. Such an edge-free design on the inside made ^¬ light even in the connection area a very precise and uniform Entemmung with a protective layer and / or a phosphor layer. Unwanted deviate ^¬ cations of the layer thicknesses compared to regions outside of this joint can be avoided, whereby the high functionality of the discharge lamp provided with the ^discharge vessel can be ensured.

Preferably, the two radii and thus the sum of these two radii of the partial regions of the connecting piece correspond to the radius of a circle on which the free ends of the vessel parts are arranged opposite one another. In the case of forming the connection piece in such a way that the two partial areas do not lie in one plane, son ^¬ countries in particular, are arranged symmetrically to a symmetry axis of the two vessel parts inclined, so a radius of a projection of the partial area in a plane perpendicular with the radius of a portion understood to Symmetrie ^¬ axis of the vessel parts. In this level are in the essentially arranged the free ends of the vessel parts. A highly symmetrical configuration and a particularly suitable connection of the connecting piece to the free ends of the vessel parts can be ensured thereby. Especially with regard to avoiding a cross-section reduction at the connection points, this embodiment is particularly advantageous.

Preferably, the connector with the free ends of the container parts is connected, which are arranged on the gegenüberlie ^¬ constricting side of those free ends, in which at least he stretches an electrode ^¬ into the interior of the discharge vessel and thus in the discharge space.

Preferably, the vessel parts are at least partially wound helically.

A discharge lamp according to the invention comprises a ^¬ OF INVENTION dung discharge vessel invention or an advantageous design from ^¬ thereof. In particular, the discharge lamp is designed as a compact fluorescent lamp and the ^discharge vessel is designed advantageously wound helically.

Brief description of the drawings

An embodiment of the invention will be explained in more detail with reference to schematic drawings. Show it: Fig. 1 is a schematic elevational view of an embodiment of a discharge lamp according to the invention;

FIG. 2 is an elevational view of an embodiment of a discharge vessel according to the invention; FIG. and

3 is a plan view of the discharge vessel of FIG .. 2

Preferred embodiment of the invention

In the figures, identical or functionally identical ^elements with the same reference numerals are provided.

In the illustration according to FIG. 1, a discharge lamp 1 is shown in a schematic elevational view, which is designed as a compact fluorescent lamp. The design as well as the illustrated components of the discharge lamp 1 are merely exemplary, the design of the discharge vessel 2 in the region of connection points 5 of vessel parts 3 and 4 of the discharge vessel 2 is essential for the invention.

In this context, the discharge vessel 2 is tubular and designed as a helical shape. The closest to ^¬ separately provided container parts 3 and 4 are also respectively wound helically and guided into each other. This means they have the same axis and at the free ends 15 and 16 (Fig. 3) connected by a separa ^¬ th connecting piece 6.

According to the illustration of FIG. 1, the discharge lamp 1 comprises a base 7, which has a housing ^¬ in which an operating device for the discharge lamp 1 can be arranged. In the socket 7 associated Ge ^¬ housing, the discharge vessel 2 extends partially. In addition, the discharge lamp 1 comprises a tube ^¬ piece, which is designed as a pump tube 8 and is connected to the discharge vessel 2. For example only, the position and placement of the pump tube 8 which extends in the axial direction of the Entla ^¬-making vessel 2 and bond steep with the ^discharge vessel 2 associated connection piece 6 in the area of supply 5 is connected as shown in FIG. 1.

The pumping tube 8 can also be connected to the discharge vessel 2 at another point, for example at the free ends 17 and 18 (FIG. 2) of the discharge vessel 2 opposite the connection points 5. At these free ends 17 and 18 extend according to FIG Embodiment electrodes 11 and 12 in the interior of the discharge vessel. 2

The embodiment of the discharge lamp 1 according to the depicting ^¬ lung in Fig. 1 is merely exemplary, and it may also comprise about beyond components, and instead of the illustrated components, other components.

In FIG. 2, in a schematic elevational view of only the discharge vessel 2 of the discharge lamp 1 is ge ^¬ shows. Hg sources (mercury sources) 9 and 10 in the form of spherical elements are shown by way of example in the pump tube 8. This Hg sources 9 and 10 are in the loading ^¬ driving the discharge lamp 1 to generate the UV (Ultra violet ^¬) radiation responsible which the atoms and molecules of the phosphor layer on the inside the discharge vessel 2 is applied, stimulate them to emit visible light.

On the inside of the discharge vessel 2, moreover, a protective layer, in particular an AlonC layer, is applied.

In Fig. 3, the Entla ^¬ training vessel 2 is shown in a plan view from above. The intertwined and HE lixförmigen container parts 3 and 4 are designed equal in Ausgestal ^¬ processing and the coils have the same radius rl on chen. The free ends 15 and 16 are arranged gege ^¬ nüberliegend and have the same distance, namely the radius rl to the center M on. The free ends 15 and 16 are designed so that they do not bend toward or away from the center M.

The connecting piece 6 is designed S-shaped in the exemplary embodiment and has a first portion 13 and a second portion 14. The two partial regions 13 and 14 have the same shape and geometry and are each realized with the same curvature. The radii of curvature of both partial regions 13 and 14 are represented by the radius r2 or the radius r3, which is equal to the radius r2. The radii are measured from the centers N1 and N2. The arcuate curvatures of the two portions 13 and 14 have by the S-shape opposite curvature ^¬ directions, wherein the direction of curvature merges at the center M of the one direction of curvature in the other direction of curvature. At the connection points 5, which are marked in the illustration of FIG. 3 on the one hand by A and the other by B, that goes Connector 6 each continuously and continuously in the free ends 15 and 16 of the vessel parts 3 and 4 via. Ins ^¬ particular on the inside is avoided by this ^{Ausgestal ¬} tion and connection of the connector 16 to the vessel parts 3 and 4 and their free ends 15 and 16, a cross-sectional constriction in the interior and beyond also a step formation or edge formation in the interior Discharge vessel 2 in the region of the joints A and B avoided.

In its specific shape according to FIG. 3, the connecting piece 6 is furthermore designed such that the sum of the two equal radii r 2 and r 3 corresponds to the radius r 1. The connector 6 is connected to the Gefäßtei ^¬ len 3 and 4 at the connection points A and B with these inextricably merged, in particular with these. Both the connecting piece 6 and the vessel parts 3 and 4 are formed from a glass material, in particular a same glass material.

This embodiment of the connector 6, a soft and uniform transition at the junctions A and B with the free ends 15 and 16 are designed. A change in the inner diameter at these connection points A and B compared to inner diameters outside of these connection points A and B can be prevented. In addition, a weakening of the wall thickness of the discharge vessel 2 at these connection points A and B can be prevented, or only a reduction of the wall thickness occurs, which is so minimal that it does not impair the mechanical stability of the discharge vessel 2. This allows advantages for the strength of the discharge 2 and the clamping of the inside of Entla ^¬ tion vessel 2 with a protective layer and a luminescent ^¬ material layer.

Claims

claims 1. Discharge vessel for a discharge lamp (1), which has a first curved vessel part (6) and a second curved vessel part (4) which are connected at free ends (15, 16) with a connecting piece (6), characterized in that the connecting piece (6) has a first partial region (13) with a first arcuate curvature and a second partial region (14) with a second arcuate curvature. 2. Discharge vessel according to claim 1, characterized in that the arcuate curvatures have opposite directions of curvature. 3. Discharge vessel according to claim 1 or 2, characterized in that the subregions (13, 14) are arranged one after the other at ^¬ . 4. Discharge vessel according to one of the preceding claims, characterized in that the arcuate curvatures of the subareas (13, 14) have a same radius (r2, r3). 5. Discharge vessel according to one of the preceding claims, characterized in that the connecting piece (6) is S-shaped, in particular has a symmetrical S-shape 6. Discharge vessel according to one of the preceding claims, characterized in that the connection points (A, B, 5) of the connecting piece (6) with the free ends (15, 16) of the vessel parts (3, 4) are continuously formed. 7. Discharge vessel according to one of the preceding claims, characterized in that the two radii (r2, r3) of the subregions (13, 14) of the connecting piece (6) to the radius (rl) of a Krei ^¬ ses correspond, on which the free ends ( 15, 16) of the vessel parts (3, 4) are arranged opposite one another. 8. Discharge vessel according to one of the preceding Ansprü ^¬ che, characterized in that the connecting piece (6) with the free ends (15, 16) is connected, which on the opposite side of those free ends (17, 18) are arranged, in which at least one electrode (11, 12) in the interior of the discharge vessel (2) he stretches ^¬. 9. Discharge vessel according to one of the preceding Ansprü ^¬ che, characterized in that the vessel parts (3, 4) are helically wound. 10. Discharge lamp with a discharge vessel (2) according to one of the preceding claims.