EP1542256A2 - Holding device for fixing a lamp envelope and lamp provided with the holding means - Google Patents

Abstract

The device consists of at least one clip element (34) or main clip with an annular supporting surface as a peripheral flange (36) with inner and outer edges, a preferably cylindrical side wall (37) whose free end forms a terminating cover (38) with an opening (40) matching the section of the bulb to be fixed and especially with an arrangement for a twist protection mechanism. An independent claim is also included for an electric lamp with a single base.

Description

Technical area

The invention relates to a holding device for fixing a lamp bulb and associated lamp according to the preamble of claim 1. It is here in particular high-pressure discharge lamps, preferably metal halide lamps, but also, for example, to halogen bulbs. Often an elongated, in particular ceramic, discharge vessel used as a lamp envelope. Details of such a lamp are in the still unpublished DE-Az 103 36 282.7.

State of the art

From DE-C1 43 17 252 is already a holding device for fixing a lamp envelope and associated lamp known, which is composed of three pistons. she has a ceramic adapter, which is mounted on a screw base. Between The outer bulb and outer bulb is at atmospheric pressure.

EP 1 109 199 describes a single ended high pressure lamp in which the Outer bulb is surrounded by a reflector. The base is by crimping attached directly to the reflector neck. The disadvantage of this is that the dimensioning of the Neck of the reflector must be matched to the standard dimensions of the base.

Presentation of the invention

It is an object of the present invention, a single-ended lamp according to to provide the preamble of claim 1, which is easy to assemble and good is to produce automated.

This object is solved by the characterizing features of claim 1. Particularly advantageous embodiments can be found in the dependent claims.

The invention enables the fixation of the lamp bulb of a one-sided crushed Lamp by means of a holding device, also called retaining element whose Holding function is realized either by form fit or by spring force. In particular, it is suitable for a spring clip that is designed as a clip mechanism. Thus, the lamp is particularly suitable for simple mechanical and automatic machine Production on production lines without hot processes such as Melting, welding or soldering. In addition, long process times, for example for drying, heating or pumping, avoided. The lamp bulb is kittlos, by means of two clips, preferably made of metal or plastic, fixed.

So far, the power supply of the lamp envelope were directly with the frame components welded. An evacuation or an inert gas filling of the outer bulb to protect the metallic frame parts from oxidation is necessary.

A lamp bulb with at least one end portion, usually a pinch or melting, is in a holding element, such as a clip mechanism, preferably made of metal, used and by positive locking or Spring force held. The holding element consists of one, more preferably however, two elements. A retaining element of a part must be suitably shaped be means of projecting from a plane components to a tilting of the Prevent piston. In contrast, stand at a holding element of two parts All design options open to prevent tilting in a simple way. In this case, the following is from a first part as the main clip and a second part as Nebenclip or auxiliary clip spoken.

At least one of the clip elements, namely the main clip, resembles a hat with a raised portion as a side wall, preferably cylindrical, and a circumferential brim, which serves as a support edge. In the brim is a twist protection mechanism built-in. In particular, these are anti-twist zones, which are notched or recessed at the brim. Alternatively you can provided at least one depression or dent and / or increase or bulge be. In the lid, so the upper end of the raised part is a the lamp envelope corresponding recess introduced their receiving geometry adapted to the end portion. In particular, the lid includes spring elements or form-locking elements as edges of the recess for the Pinch zone of the lamp bulb.

The second, namely the secondary clip, is typically similar to the structure of the Main clip, however, its sidewall is lower.

In some cases, it is possible that the Nebenclip only from a brim and the It is integrated in the lid, which corresponds to the lamp envelope Recording geometry for the end portion of the lamp envelope is maintained. It So it is a clip without sidewall. If both clip elements one Sidewall, the height of the side wall of the sub clip is always smaller as the height of the side wall of the main clip. Usually also the diameter the minor clip slightly smaller than the main clip to better the to be able to add both parts. This is the easiest way to accomplish that the two clip elements are joined together. The attached clip mechanism can both solvable and insoluble, e.g. laser welded, be designed. By the joining of the clip elements arises, due to the serving as bearing surfaces Brims, a defined, parallel spacing of the reception plateaus. This distance is chosen so that the spring elements of the clip mechanism on the surface of the end portion, which they surround, rest, usually a squish area of the to be joined lamp bulb. It is intended for the external power supply the lamp envelope closer clip element, namely the secondary clip, a specific Safety distance to the power supply lines are maintained.

The so-joined connection of the two clip elements is on an insulating Attachment, preferably a ceramic adapter, mounted, the attachment about anti-twist mechanism of the clip elements corresponding anti-rotation means features. Here, for example, in the clip elements introduced Verdrehschutzzonen via corresponding elevations or depressions used in the adapter ceramic.

In, for example, a lamp, the envelope part as an outer bulb or a Reflector uses, the enveloping part is preferably made of glass or in the case of a Reflector lamp made of aluminum, where it is equipped with a reflector contour.

The Hüllteil rests on the brim of the clip elements and is by means of a staple tape, z. B. crimp ring, preferably aluminum, against rotation with the Attachment / adapter connected. The concrete between the Hüllteil and the essay or the adapter ceramic lying brim of the clip combination is formed by the molding the Bördelrings also fixed.

Advantageously, the base, preferably made of metal, by deformation on the Attachment, which serves as a pedestal, fixed. The electrical contact between external power supply of the lamp and the socket contacts is preferred by an extension made of a suitable conductor material. The connections are made by deformation or clamping.

a) der Sockel weist einen aus isolierendem Material gefertigten Sockelstein auf, der eine zentrale Öffnung besitzt;

b) der Sockelstein besitzt ein radial vorspringendes Segment, das insbesondere kreisförmig ist, mit einem bezogen auf den Sockel zugehörigen oberen und unteren Plateau;

c) das Hüllteil besitzt sockelseitig eine, insbesondere kreisförmige, Öffnung mit einem radial vorspringenden Rand oder Randabschnitt, der bezogen auf den Sockel eine untere und obere Kontaktfläche aufweist, wobei die untere Kontaktfläche des Rands oder Randabschnitts mit dem oberen Plateau des radial vorspringenden Segments am Sockelstein zusammenpasst;

d) das Hüllteil ist am Sockel durch einen kittfreien mechanischen Haltemechanismus befestigt.

A preferred application is in a lamp capped on one side, which has a vacuum-sealed lamp vessel, in particular an elongate discharge vessel, which may still be accommodated in an outer bulb, the lamp vessel, ie the discharge vessel or else the discharge vessel with outer bulb, still having an enveloping part is surrounded. It is preferably a ceramic discharge vessel, in particular for a metal halide lamp, for example for general lighting purposes. In this case, a socket with electrical connections on the one hand carries the lamp bulb and on the other hand, the Hüllteil. The electrical connections are normally connected to power supply lines, which produce an electrical contact to a light source inside the lamp bulb, for example, the light source is realized by electrodes or a luminous element of an incandescent lamp. Without limiting the invention, external electrodes may also be used, or an electrodeless configuration. Instead of a ceramic discharge vessel, a discharge vessel made of quartz glass or hard glass can also be used. An outer bulb is not essential. The combination of the following features is used, so that a cumbersome rack assembly and hot processes such as melting, baking the Sockelkitts omitted:

a) the base has a socket made of insulating material, which has a central opening;

b) the base stone has a radially projecting segment, which is in particular circular, with a relation to the base associated upper and lower plateau;

c) the Hüllteil has a base side, in particular circular, opening with a radially projecting edge or edge portion, based on the base has a lower and upper contact surface, wherein the lower contact surface of the edge or edge portion with the upper plateau of the radially projecting segment on the base stone matches;

d) the Hüllteil is attached to the base by a putty-free mechanical holding mechanism.

In particular, the enveloping part is attached in a first embodiment, that a bracket part the distance between the lower plateau of the base stone and at least the upper contact surface of the edge bridged halternd.

In a second embodiment, the enveloping part and the clamp part may be one unit form, wherein the holder of the Hüllteils realized in the upper part of the base stone is, for example by crimping.

The base has next to the base stone a usual, facing the socket Part on, for example, a screw base approach or bayonet socket approach.

According to the lamp bulb, so for example, the outer bulb or the discharge vessel in the absence of an outer bulb, in the central Opening of the base stone by means of a special mounted on the base stone Retaining element, in particular a spring clip, held.

In particular, the edge of the Hüllteils and the segment of the base stone with a co-acting anti-rotation mechanism is equipped.

A simple, reliable and cost-effective solution for holding the Hüllteils is that the clamp part consists of circumferentially distributed brackets or a circulating clamp band. In particular, the staple band a deformable ring made in particular of metal or plastic is so that a very simple mounting is possible by the fact that the staple tape initially angled at the bottom, and it over to stop the base is pulled up to the projecting segment. As soon as that Hüllteil is attached, the ring, preferably made of aluminum, mechanically on Segment formed, and so fix the edge of the Hüllteils.

It is preferred between the clamp part and the upper contact surface of the edge of the Hüllteils introduced a damping agent. It is in particular a kind of O-ring, for example, an elastomer. Thus, the material of the Hüllteils, advantageous glass or aluminum, during the Anformprozesses from damage protected. Another advantage is that it over the life of the lamp the connection force between Hüllteil and segment remains free of play. by virtue of the damping ring can increase the tension of the clamp part safely and thus make the connection more reliable.

Usually, power supplies are led out of the lamp envelope, the connected to the electrical terminals of the socket. A particularly flexible and time-saving solution is for the connection between the electrical Terminals and the power supply terminals to use terminal connections as they are known per se, for example from DE-A 199 14 308.

Usually, the base also has a barrel-facing portion that at least partially as known per se connected by crimping with the base stone is. For example, this part contains a standard screw thread.

The envelope part may be, for example, a closed part such as a further, but not vacuum-sealed, outer bulb act, or also around a dome, which has a reflector contour.

A typical application is a metal halide lamp that is filled with or without mercury content, possibly with inert ignition gas, preferably noble gas.

Brief description of the drawings

Figur 1

eine Metallhalogenidlampe in Seitenansicht (Fig. 1a) und in um 90° gedrehter Seitenansicht (Fig. 1b);

Figur 2

ein zweites Ausführungsbeispiel einer Lampe in Seitenansicht (Fig. 2a) und in um 90° gedrehter Seitenansicht (Fig. 2b);

Figur 3

ein Detail der Lampe in Vergrößerung vor endgültiger Befestigung;

Figur 4

eine erste Ausführungsform des Hauptclips;

Figur 5

eine erste Ausführungsform des Nebenclips;

Figur 6

eine zweite Ausführungsform des Hauptclips;

Figur 7

eine dritte Ausführungsform des Hauptclips;

Figur 8

ein erstes Ausführungsbeispiel eines Sockelsteins;

Figur 9

ein zweites Ausführungsbeispiel eines Sockelsteins;

Figur 10

ein Ausführungsbeispiel einer Reflektorlampe;

Figur 11-14

weitere Ausführungsbeispiele eines Halteelements.

In the following the invention will be explained in more detail with reference to several embodiments. Show it:

FIG. 1

a metal halide lamp in side view (FIG. 1a) and rotated in 90 ° side view (FIG. 1b);

FIG. 2

a second embodiment of a lamp in side view (Fig. 2a) and rotated in 90 ° side view (Fig. 2b);

FIG. 3

a detail of the lamp in magnification before final attachment;

FIG. 4

a first embodiment of the main clip;

FIG. 5

a first embodiment of the secondary clip;

FIG. 6

a second embodiment of the main clip;

FIG. 7

a third embodiment of the main clip;

FIG. 8

a first embodiment of a base stone;

FIG. 9

a second embodiment of a base brick;

FIG. 10

an embodiment of a reflector lamp;

Figure 11-14

further embodiments of a retaining element.

Preferred embodiment of the invention

An embodiment of a metal halide lamp 1, Fig. 1 and 2, respectively 90 ° turned against each other. A ceramic discharge vessel 2, the two-sided is closed, is arranged longitudinally in the lamp axis A. It's tight surrounded by an outer bulb 3, which is squeezed on one side and made of tempered glass or quartz glass is made. A frame 4 with short and long supply line 5, 6 holds the discharge vessel 2 in the outer bulb 3. The electrodes 7 in the interior of the discharge vessel are connected via bushings 8 with the leads 5, 6. The latter are in the region of a pinch 9, which closes the outer bulb 3, connected to external power supply lines 10. The pinch 9 of the outer bulb sits over a cavity 11 of a base 12 made of ceramic and is by a Retained holding member 13 made of metal. The pedestal can also be from another Be made of material, for example, a heavy-duty plastic.

The retaining clip 13 protrudes from a plane of the base stone, which is an upper plateau 14 of a radially projecting disk-shaped segment 15 forms. The Segment 15 is further provided with a sidewall 16 and a lower plateau 17 executed. It is sitting on a neck part 18, the part assigned to it, here a screw base part 19 threaded, holds. The screw base 19 is by means of Crimp 20 attached to the neck portion 18. in the opening 11 of the neck portion 18 are the Power supply lines 10 with electrical connections 21 of the base of the neck portion connected (not visible). Similarly suitable are other mechanical joining techniques or a standard weld joint or a clamp-cut connection.

The holding element 13 is designed in two parts and consists, as shown in detail in the figures 4 and 5, of two joined spring clip elements, namely the main clip 34 and the secondary clip 35 sitting underneath. Both are like a top hat built up. They each have a circumferential brim 36, one at the Inner edge attached side wall 37 and a free end final Lid 38.

The main difference between main clip 34 and slave clip 35 is the different one Height of the side wall 37. It is in the case of the main clip, in which the Height H of the side wall is typically one to two cm, much larger than in Trap of the secondary clip, in which the height HN of the side wall typically significantly smaller is, and in particular a few mm, about 3 to 6 mm. Under certain circumstances is completely dispensed with the side wall of the side clip. Generally directed the height of the side wall depends on the light center of the in the holding element to be used piston. It may be possible that the Side clip 35A for setting a desired light center no side wall needed, ie a flat disc 71 with corresponding recess 72nd and anti-rotation 73, see Figure 13. At low center of gravity may also require negative values for the height of the sidewall, see Figure 14, i. the side wall 74 extends in the opposite direction, So in the opening 11 of the base stone into it.

Both elements have a Verdrehschutzmechanismus, in the illustrated embodiment in a recess 39, which is roughly rectangular punched in the brim is, is realized. Both elements have this recess the same way twice.

Both elements, see also again Figure 4 and 5, also have an approximately rectangular recess 40 in the lid, the pinch 9 of the outer bulb is adjusted. In the recess 40 each project four spring tongues 41, the Thus, the I-shaped pinch 9 can fix. A part 42 of the side wall, which adjoins the recess can, as shown in Figure 5 for reasons of simplification be distant.

In Figure 2, another embodiment of a lamp is shown, the essential Difference is the different height of the lid of the secondary clip. One Detail is shown in Fig. 3.

An enveloping piston 24, which surrounds the outer bulb 3 at a relatively large distance, has a socket-side opening 25 which is circular cylindrical and in diameter to the outer diameter of the segment 15 is adjusted. Between both parts, in Form and dimension are adapted to each other, can still a buffer member 26 (dashed 3) may be inserted, for example, a silicone sleeve can be.

The enveloping piston 24, see also Fig. 3, is at its opening 25 with a radial projecting edge 27 equipped. He has a flat bottom contact surface 28, which is adapted to the upper plateau 14 of the segment of the base. The top Plateau may have bumps 22, which is a spacing of the upper plateau 14 effect to Hüllkolben 24. He also has a narrow upper contact surface 29, which is aligned parallel to the lower contact surface 28 or obliquely thereto. On it sits an elastomeric ring 30, for example made of Viton®.

Figure 3 shows this area in magnification after a staple part is attached. Shown is a clamp ring made of an aluminum strip 31, the lower edge 32 is angled at about 90 °, so that the band 31 up to the serving as a stop lower plateau 17 of the segment is postponed. The stapling effect is achieved in that the upper edge 33, the first aligned straight was subsequently rolled with force, so that he was on the elastomer ring 30 rests. By the connection force of the enveloping piston 24 via the elastomer ring 30 with tension, which leads to the deformation of the ring 30, against the upper Contact surface 29 of the edge 27 pressed.

In Figure 4, the above-explained main clip 34 is shown in detail.

In Figure 5, the above-explained auxiliary clip 35 is shown in detail.

FIGS. 6 and 7 show another embodiment of a main clip 34. He differs essentially by the differently constructed anti-rotation from the first embodiment. In FIG. 6, it is designed as a bulge 43. In FIG. 7 he designed as a dent 44.

In Figure 8 of the spring clip 13 associated base stone is shown. He fits in with that shown in Figure 7 main clip. The base brick 12 has a central opening 11, and a disc-shaped or collar-shaped segment 15 with upper and lower Plateau 14 and 17 and the side wall 16. The collar 15 sits on the neck part 18. Essential to understanding the anti-rotation is the dent 45, the two opposite sides of the collar is placed in the upper plateau. These Delle 45 is similar to the dent 44 in the resilient clip elements, both at main clip 34 and side clip 35. This allows the joined clip elements 34, 35 are also joined to the base brick 12 by each of all three components with aligned dents 44, 45 are arranged. By the Engaging the dent 44 of the main clip and the secondary clips in the dent 45 of the base stone a rotation relative to each other is prevented

Fig. 9 shows another embodiment of the base block 12, in which the anti-rotation part a bulge 46 is. This bump 46 is either shaped like the same the bulge 43 of the main clip in Figure 6, so that here again a twist is realized, the quasi the positive to the solution shown in Figure 8 means Represents negative. In the case of the bump, however, an even easier anti-rotation protection is feasible, by the bulge 46 with the correspondingly adapted recesses 39 can interact from Figure 4 and 5. Conversely, the solution has the bumps the advantage that this easily a permanent connection of the resilient Clip elements is possible by main and secondary clip 34, 35, for example connected by laser welding in the region of the two bumps 39 become.

FIG. 10 shows a reflector lamp 60 with a reflector part 61 as an enveloping part. In this case, the contour of the reflector part 61 is made of aluminum. On the base stone 62 sits a separate collar ring 63 which is cylindrically shaped and the outer bulb 64 partially surrounds, but below the discharge volume 65 of Discharge vessel 66 ends. An attachment is realized by crimping. For details, this can be found in DE-Az 103 36 282.7.

Fig. 11 shows a holding device, which consists of only one element. there has the spring clip element 48 has the same structure as the main clip in Figure 4. The The main difference, however, is that the spring tongues are bent differently. While in Figure 4, the spring tongues all when inserting the pinch of the lamp envelope be bent from top to bottom and therefore to the leadership and Orientation of the lamp bulb a second clip, just the secondary clip, with a certain distance between the two cover levels is necessary, then a single clip is sufficient 48, when the lamp bulb is short and if each two spring tongues 49 of in the beginning are bent upwards, so they do not insert the piston to be bent down. The two other spring tongues 50 are in front of the Inserting the piston is still straight, but may already be in advance for support be bent down a bit. It is recommended for better axial alignment as similar pairs of spring tongues always diametrically opposed Use spring tongues.

In a particularly simple embodiment of FIG. 12a, the function of Main and secondary clip also united in a single spring clip 34A. Here is the clip executed in principle as a main clip, with lid 38 as the first holding plane. The second holding plane, which is normally formed by the lid of the secondary clip is is now through from the cylindrical portion of the clip, so the side wall 37, punched and spring-bent elements 69 replaced.

Another embodiment FIG. 12b is constructed in a manner very similar to FIG. 12a. but it shows a clip 80, in which the resilient elements in contrast to Figure 12a elements 81 of the side wall 83 are again at their free ends are bent over. the spring tongues 82 on the cover are already slightly bent downwards.

A single clip can then be used alone if the bulb to be held is very short. Nevertheless, the use of a remedy is recommended here for torsion protection for attachment to the base stone, even if no joint with the secondary clip is required.

For extra long lamp bulbs in addition to the first auxiliary clip also still a second Nebenclip be used.

In all cases with more than one clip element, of course, the dimensions of the Clip element suitably matched to each other, especially the diameter The cylindrical side walls should be slightly different. It is advisable in particular a slightly conical shape of the side walls, the stackability favored several clip elements.

Claims (14)

Holding device (13) for fixing a lamp bulb, characterized in that the holding device (13), from at least one clip element, hereinafter often called main clip (34) consists, wherein the main clip (34) as a bearing surface a circular ring as a circumferential rim (36 ) with inner and outer edge has, at its inner edge, in cross section approximately transversely, a circumferential side wall (37) with a given height H followed, which is preferably cylindrical, the free end forms a final cover (38), wherein the lid has a recess (40) which is adapted to a portion to be fixed (9) of the lamp envelope, and in particular has a means for anti-rotation mechanism. Holding device according to claim 1, characterized in that the holding device either as a spring element accomplishes the fixation via spring forces or positive engagement. Holding device according to claim 1, characterized in that the main clip is the only element of the holding device. Holding device according to claim 1, characterized in that protrude into the recess at least four spring tongues, which cooperate in particular in pairs. Holding device according to claim 2, characterized in that a spring element consists of two for grouting in each other clip elements, wherein a first clip element is formed by the main clip and has a circumferential brim as a support surface, and wherein a second clip element, often referred to here as Nebenclip, also at least has a circumferential brim and a lid, which is essentially modeled on the main clip, in particular, the brims of both clip elements have means for a Verdrehschutzmechanismus. Holding device according to claim 5, characterized in that the secondary clip also has a side wall whose height HN is smaller than the height H of the side wall of the main clip. Holding device according to claim 5, characterized in that both clip elements are made of metal. Holding device according to claim 5, characterized in that also the secondary clip has a recess whose edge are equipped with means which show a spring action, in particular with spring tongues. Holding device according to claim 1, characterized in that the anti-rotation mechanism uses at least one of the following means: a recess, a dent, a dent. Holding device according to claim 5, characterized in that the clip mechanism is grouted either releasably or non-detachably. Single-ended electric lamp, in particular high-pressure lamp, with a vacuum-sealed lamp bulb, which is surrounded by a Hüllteil, wherein a socket with electrical connections on the one hand carries the lamp bulb and on the other hand, the Hüllteil, with the following features a) the base has a base made of insulating material, which has a central opening in which a portion of the lamp envelope is received without cement by means of a holding device; b) the base stone has a circular, radially projecting segment with a plateau; c) the envelope part has a circular opening on the base side with a contact surface which is adapted to the plateau of the circular, radially projecting segment on the base stone; d) the Hüllteil is attached to the base; characterized in that the holding device is designed according to one of the preceding claims and is connected to a portion of the lamp envelope to be fixed, in particular a designed as a pinch end portion. Lamp according to claim 11, characterized in that the lamp bulb is a discharge vessel, or an outer bulb, in which a discharge vessel is housed. Lamp according to claim 11, characterized in that the envelope part is a closed piston or a reflector having a reflector contour. Lamp according to claim 13, characterized in that the enveloping part is made of glass or aluminum.

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