light

Abstract

The invention relates to a luminaire comprising a housing (1) extending longitudinally in an axial direction, wherein a plurality of light sources (3) are arranged in the housing (1), which are adjacent to one another in the axial direction, and the housing (1) has at least one light emission opening (5) in a housing wall region through which light generated by the light sources (3) can be emitted transversely to the axial direction, wherein the housing (1) has electrical contact elements (4a, 4b) with which the light sources (3) and / or electronics arranged in the housing can be energized, wherein the contact elements (4a, 4b) are formed by a first and a second contact element (4a, 4b), wherein the first contact element (4a) forms a partial region of the axial end face of the housing (1) at its first axial end, and the second contact element (4b) forms a partial region of the axial end face of the housing (1) at its second axial end.The invention also relates to a system consisting of a lamp and two socket elements (6'a, 6'b), as well as the use of contact elements (4a, 4b) and surfaces intended for battery cells.

Description

[0001] The invention relates to a luminaire comprising a housing extending longitudinally in an axial direction, in particular comprising a rod-shaped or tubular housing, preferably which is at least partially circular-cylindrical, wherein a plurality of light sources, preferably LED-based light sources, are arranged in the housing, which are adjacent to one another in the axial direction, and the housing has at least one light emission opening in a housing wall area, through which light generated by the light sources can be emitted transversely to the axial direction, wherein the housing has electrical contact elements with which the light sources and / or electronics arranged in the housing can be energized.

[0002] The invention also relates to a system consisting of such a lamp with socket elements.

[0003] Such a luminaire with the aforementioned features is published, for example, in DE 10 2022 127 156 A1, which originates from the same applicant.

[0004] In the aforementioned prior art, the contact elements are designed as plug or socket elements projecting radially from the luminaire housing to the axial direction, necessitating a manufacturer-specific pairing of plug and socket elements for contacting. This results in increased design and assembly effort, as the elements of the on-site contacting, particularly the socket elements, and the elements of the luminaire-side contacting must be specifically adapted to each other. Access to existing contact elements or socket elements on the market is not possible.

[0005] Furthermore, due to the manufacturer-specific pairing of radially protruding contact elements, rotation of the luminaire around its central longitudinal axis is only possible within a limited angular range.

[0006] Against this background, one object of the invention is to make the possibility of contacting an axially extended lamp more universal and to also enable improved rotatability of the lamp about its central longitudinal axis.

[0007] According to the invention, this is achieved by a lamp of the type mentioned above, in which the contact elements are formed by a first and a second contact element, wherein the first contact element forms a partial area of ​​the axial end face of the housing at its first axial end and the second contact element forms a partial area of ​​the axial end face of the housing at its second axial end.

[0008] The portion of the axial end face formed by the contact elements is preferably a centric portion of the end face or a portion formed around the center of the end face.

[0009] According to the invention, this results in the lamp being able to be contacted in the axial direction in order to supply power to the internal components, such as the light source and / or electronics required for the light source. The contact elements of the lamp are spaced apart in the axial direction from the central longitudinal axis of the lamp; preferably, the central longitudinal axis of the lamp passes through both contact elements, particularly centrally. This allows the lamp to be rotated completely about the central longitudinal axis, so that lamps according to the invention can be more easily adapted to individual lighting situations.

[0010] Regardless of the chosen length of the light, contact is always made at the axial ends of the light, so that it can be held securely even at very long lengths.

[0011] Preferably, each light source has its own light emission opening, e.g., formed by the end of a wall section surrounding the respective light source, a reflector, or a glare-reducing element that lies in the direction of emission. Such an end can open physically / mechanically into the surface of the luminaire.

[0012] A light emission opening in the housing wall area is also understood to be an area in which the housing is physically / mechanically closed, e.g., by a wall, but which is permeable to light, in particular being transparent or at least translucent. Preferably, such a light emission opening can be an opaque housing wall area, in particular where the plurality of light sources are arranged radially inside the outer diameter of the housing, and thus radially below such a light emission opening.

[0013] Preferably, the multiple light sources arranged axially side by side are mounted on a single circuit board that extends through the entire housing of the luminaire in the same axial direction and is electrically connected to the contact elements at the axial ends of the housing. However, the invention can also provide that several circuit boards, in particular at least two, are arranged in the housing of the luminaire, positioned one behind the other in the direction of extension of the housing and electrically connected to each other, e.g., by cable or wire connections. Each of the several circuit boards then carries a fraction of the total number of light sources. On the single or multiple circuit boards, the light sources are preferably arranged side by side in the axial direction, preferably equidistantly.

[0014] In a preferred embodiment, the invention provides that, viewed in axial projection, the luminaire has the same cross-sectional shape and size as it does at its two axial ends. This cross-sectional shape and size can, in principle, be arbitrary, but is identical at both ends.

[0015] In particular, this consideration in projection means that along the entire axial extent of the luminaire there is no area of ​​the luminaire that projects radially outwards beyond the cross-section that is present at the axial ends of the luminaire.

[0016] In particular, the cross-sectional shape is rotationally symmetric or at least rotationally symmetric, especially rotationally symmetric in n-fold terms; preferably, the luminaire has a circular or polygonal cross-section in projection. Rotationally symmetric is preferably understood to mean that the cross-sectional shape of the luminaire is not symmetric about its central longitudinal axis in every rotational position, but that there are a plurality of rotationally spaced at equal angles in which the cross-sectional shape is transformed into itself. In the case of n-fold rotational symmetry, the cross-sectional shape is transformed into itself n times in a complete rotation of 360 degrees.

[0017] It can be provided that the luminaire has exactly the same cross-sectional shape and size at every point along its axial extent as corresponds to the cross-sectional shape and size in the projection. In this case, the luminaire is completely cylindrical, in particular with any cylindrical base shape, preferably circular or n-gonal. This results, for example, when the light emission aperture is not a physical / mechanical opening in the lateral surface of the luminaire housing, but is formed by a translucent wall.

[0018] If the luminaire has physical / mechanical light emission openings for the light source, the luminaire does not have the same cross-sectional shape and size at every point along its axial extent as at the end, particularly not at the locations of individual light emission openings, but preferably in all other areas that lie axially adjacent to a light emission opening or adjacent to all light emission openings and / or between adjacent light emission openings. In the areas of light emission openings, the local cross-section perpendicular to the central longitudinal axis is smaller than the cross-sectional shape and size that would result from the projection.

[0019] This possibility for the design of the luminaire is made possible by completely eliminating contact elements that protrude radially from the housing and by making contact in the axial direction and thus within the luminaire cross-section considered in the axial projection.

[0020] The invention further preferably provides that each of the contact elements is designed to be rotationally symmetrical or at least rotationally symmetrical around the central longitudinal axis of the housing. This also supports the rotatability of the luminaire around the central longitudinal axis, because preferably in every rotational position the respective contact element is contacted in the same way.

[0021] A preferred design provides that one of the contact elements has a metallic contact surface area comprising an annular outer section that surrounds a central inner section projecting beyond the outer section. This projecting section extends away from the housing, i.e., outwards in an axial direction.

[0022] Furthermore, the other contact element comprises a metallic contact surface area that either lies entirely in the same plane or that includes an annular outer sub-area surrounding at least one central sub-area that is level with the outer sub-area. Level sub-areas thus lie in the same plane, which is perpendicular to the central longitudinal axis. An annular groove or indentation, or an annular bulge, may be provided between level sub-areas.

[0023] Due to the aforementioned design features of the two contact elements, these contact elements according to the invention are preferably configured to correspond to battery contacts of circular cylindrical battery cells, in particular battery cells that comply with standard IEC-60086 and preferably those corresponding to sizes R6 / R14505 / AA / LR6 or R03 / R10445 / AAA / LR03 or R14 / R26500 / C / LR14 or R20 / R34615 / D / LR20. The aforementioned sizes are each represented by four different values, separated by " / ", but all denoting the same size.

[0024] The invention makes it possible to use industrially manufactured contact elements already available on the market, namely those from batteries, for the use of contact elements on a lamp according to the invention, without having to develop new contact elements.

[0025] This type of design further reveals that the contact elements of the luminaire can preferably also be contacted by such external contact surfaces which are intended for electrical contacting cylindrical battery cells that comply with the IEC-60086 standard, in particular battery cells of sizes R6 / R14505 / AA / LR6 or R03 / R10445 / AAA / LR03 or R14 / R26500 / C / LR14 or R20 / R34615 / D / LR20.

[0026] It is preferably provided that, in order to achieve the best possible compatibility with contact surfaces for contacting battery cells and / or socket elements in which the contact surfaces for contacting battery cells are provided, the luminaire according to the invention has an outer diameter, in particular plus / minus 10%, which is provided according to the said standard for circular cylindrical battery cells, preferably which is provided for battery cells of the following sizes: R6 / R14505 / AA / LR6 or R03 / R10445 / AAA / LR03 or R14 / R26500 / C / LR14 or R20 / R34615 / D / LR20.

[0027] The invention thus also relates to a system comprising a luminaire of the type described above and below and two socket elements spaced apart in the axial direction of the luminaire's extension, in particular those in which batteries according to IEC-60086 could also be accommodated, wherein a first socket element comprises a contact surface that is not compliant in the axial direction, to which a first contact element of the luminaire can be electrically connected, in particular the contact element with the projecting part, and wherein the second socket element comprises an axially compliant contact surface subjected to force in the direction of the luminaire, in particular one formed by the end of a spring element, with which the second contact element of the luminaire can be contacted and an axial force can be exerted on the luminaire, with which the luminaire can be held between the socket elements at least by frictional engagement.Therefore, socket elements with contact surfaces that are actually intended for contacting and / or holding battery cells, especially those according to IEC-60086, can also be used for contacting and / or holding the light fixture.

[0028] A preferred embodiment provides that both contact elements of the lamp are surrounded by an annular insulating element. Preferably, the respective contact element and the respective insulating element are materially bonded to one another, in particular wherein the contact element is embedded in the insulating element with an outer edge region.

[0029] The insulating element provides insulation against electric current / voltage. It is preferably made of electrically non-conductive plastic, most preferably by injection molding. The entire axial end face at each axial end of the luminaire housing is thus formed by an outer annular section created by the insulating element and an inner section formed by the contact element.

[0030] This type of design allows, for example, the luminaire housing between the axially oriented insulating elements to be made of metal. A luminaire housing made of plastic is also possible, which allows for very easy bonding between the plastic of the luminaire housing and that of the respective insulating element, for example by thermal welding, vulcanization, or other bonding methods.

[0031] In particular, in a design using the aforementioned insulating elements, it is provided that the insulating elements are attached to the annular axial end faces of the housing, preferably by bonding, and thus axially mounted onto the axial end faces of the housing from the outside. However, it is also possible to insert and attach the insulating elements wholly or partially inside the luminaire housing, especially the at least substantially tubular part of the luminaire housing, at its axial end region, preferably by bonding, e.g., by adhesive bonding.

[0032] A structurally preferred embodiment provides that the insulating element of one of the contact elements, in particular the contact element with the planar contact surface area or the level sub-areas, has an axially projecting annular collar, in particular one that points away from the housing, wherein the contact element lies below the plane of the annular axial end face of the collar in the direction of the housing. Preferably, the contact element lies at a distance below the plane of the annular axial end face of the collar that is greater than the distance by which the other contact, in particular the contact which comprises an annular outer sub-area that surrounds a central inner sub-area projecting from the outer sub-area, rises above its insulating element.

[0033] Preferably, this ensures that two lamps equipped with such contact elements cannot be connected in series in the axial direction because the projection of one contact does not extend far enough through the collar in the axial direction to touch the contact surface of the other contact.

[0034] A preferred embodiment of the insulating elements and the contact elements provided therewith comprises two spaced-apart guide elements integrally formed on the side of each insulating element facing the interior of the housing. Between these guide elements lies an axial end of at least one circuit board arranged in the housing, preferably the end of a single circuit board extending through the entire housing and carrying the light sources. Such guide elements can preferably be designed as webs projecting axially from the insulating element into the interior of the housing. In this way, the guide elements can laterally surround the end of a circuit board along its long sides, thus stabilizing the position of the circuit board at its end, or preferably at both ends in the case of a single circuit board, between the guide elements.This can be particularly helpful when creating an electrical contact between the circuit board and the contact element.

[0035] It is further preferred that an electrical contact tab of the contact element projects axially on the side of each insulating element facing the interior of the housing.

[0036] ZB, it is preferably provided that the contact tab extends through the material of the insulating element. The contact tab is therefore preferably arranged in an area where the edge region of the contact element is embedded in the plastic of the insulating element.

[0037] Such a contact flag is preferably positioned so that a soldering surface area of ​​a circuit board end lying between the guide elements is covered by the contact flag, so that soldering of the contact flag and soldering surface area can be carried out particularly easily.

[0038] An embodiment of the invention is explained with reference to the figures.

[0039] The Fig. Figure 1 shows in several views, in particular in several top and sectional views, a luminaire according to the invention with a luminaire housing 1 in which several light sources 3, in particular LED-based light sources, such as COB LEDs, are mounted on at least one circuit board 2. A single circuit board 2 preferably extends through the entire luminaire housing 1 between the axially end-facing contact elements 4a and 4b, but several circuit boards arranged one behind the other and electrically connected can also be provided.

[0040] In the version shown here according to Fig. In Figure 1, each light source 3 is assigned a separate light emission opening 5 through which the light from the light sources 3 can exit the housing 1. This opening is designed as a physical opening in the outer surface of the housing 1. However, it is also possible for the light emission opening to be designed as a translucent area of ​​the outer surface of the housing 1 or of a separate cover, as shown in Figure 1. Fig. 2 is shown on the right using the dashed lines and the hatched area. In this case, the light exit aperture 5 is physically closed.

[0041] The Fig. Figure 2 shows the possibility of contacting the contact elements 4a, 4b of a luminaire by means of contact surfaces 6a, 6b (of socket elements not shown here), which are designed for contacting battery cells according to standard IEC 60086. This possibility arises from the fact that the contact elements 4a, 4b themselves are preferably designed like the contact elements of circular cylindrical battery cells according to standard IEC 60086, i.e., essentially such that contact element 4a has a raised projection and contact element 4b is flat. A luminaire is held in place, at least by friction, by the axial force applied via one of the contact surfaces of the socket elements, here contact surface 6b. Additionally, the socket elements, which comprise the contact surfaces 6a, 6b, can also have form-fitting structures with the end of the luminaire and / or the outer surface of the luminaire, in particular as shown in the Fig. 6 shows.

[0042] The Fig. Figure 3 shows only the internal structure of a light fixture without the outer casing, which otherwise has the same elements. Fig. 1 and Fig. 2. In addition, it is more clearly visible here that the circuit board 2 lies with its two ends between guide elements 7, which are arranged inside on insulating elements 8a, 8b, which surround the contact elements 4a and 4b.

[0043] The units consisting of the insulating element and the contact element are for contact element 4a in the Fig. 4 and for the contact element 4b in the Fig. 5 shown in detail.

[0044] In the Fig. Figure 4 shows that the contact element 4a has a metallic, radially outer, annular section 4a1, which surrounds an axially outwardly projecting section 4a2. The projecting section 4a2 forms an inward recess. The contact element 4a thus formed is surrounded on the outside by the insulating element 8a in an annular fashion. The outer edge of the outer section 4a1 is embedded in the plastic of the insulating element 8a, e.g., by injection molding.

[0045] Pointing into the interior of the housing 1 (not shown here), two guide elements 7 project from the insulating element 8a, between which the end of the previously shown circuit board 2 can be positioned. One of two solder pad areas 2a, which are located in the Fig. 1 and Fig. 3 can be positioned under a contact tab 4a3 of the contact element 4a, thus enabling simple soldering.

[0046] In the Fig. Figure 5 shows that the contact element 4b has a metallic, radially outer, annular sub-section 4b1, which surrounds a centrally located sub-section 4b2. Both sub-sections are arranged at the same level. Unlike the contact element 4a, there is no protruding sub-section here. The contact element 4b thus formed is also surrounded on the outside by the insulating element 8b in an annular shape. The outer sub-section 4b1 is embedded with its outer edge in the plastic of the insulating element 8b, e.g., by injection molding.

[0047] Pointing into the interior of the housing 1 (not shown here), two guide elements 7 also project from the insulating element 8b, between which the end of the previously shown circuit board 2 can lie. One of two solder pad areas 2a which are located in the Fig. 1 and Fig. 3 can be positioned under a contact tab 4b3 of the contact element 4b, thus enabling simple soldering.

[0048] The insulating element 8b has the special feature of a base section 8b1 that adjoins the subsection 4b1 of the contact element 4b. An axially projecting collar 8b2 is arranged on the radially outer edge of the base section 8b1, such that the contact element 4b is recessed relative to the axial end face of the collar 8b2. This prevents series connection of luminaires because the projecting section 4a2 of the contact element 4a of a first luminaire cannot touch the contact element 4b of a second luminaire. For this purpose, the height of the collar 8b2 above the contact element 4b is chosen to be greater than the height of the projection 4a2 relative to the insulating element 8a.

[0049] The insulation elements 8a and 8b of the Fig. 4 and Fig. The 5 are attached to the ring end face at the respective axial end of the housing 1 with their end faces facing the housing, e.g. by gluing. The insulating elements 8a, 8b and the contact elements 4a, 4b then form partial surfaces of the axial end faces of the lamp according to the invention, the contact elements being rotationally symmetrical about the central longitudinal axis 9 of the lamp. This central longitudinal axis 9 is shown as a dashed line in the Fig. 2 shown below.

[0050] The Fig. Figure 6 shows a system as a luminaire, whose housing 1 is enclosed between two socket elements 6'a and 6'b, wherein the contact surface 6a of the socket element 6'a contacts the contact element 4a of the luminaire and the contact surface 6b of the socket element 6'b contacts the contact element 4b of the luminaire. Here, the socket elements 6'a and 6'b are integrally joined to form a single unit; however, the socket elements 6'a and 6'b can also be designed as separate components.

[0051] As shown here, for all possible embodiments of such a system, it can be provided that both socket elements 6'a and 6'b encompass the axial end of the luminaire axially and radially, in particular by a collar projecting axially from the respective socket element 6'a and 6'b in the direction of the luminaire radially outwardly encompassing the end of the luminaire.

[0052] Preferably, the distance between the two opposing axial end faces of the collar is smaller than the axial length of the luminaire, while the distance between the socket elements radially inside the collar is larger than the axial length of the luminaire.

[0053] The Fig. Figure 6 shows the contact surface 6b as the free end of a metallic spring in its uncompressed, non-axially compressed form. This illustrates that to insert the luminaire into the socket elements 6'a and 6'b, the end of the luminaire with the contact element 4b is inserted into the socket element 6'b, thereby axially compressing the spring, and then the end of the luminaire with the contact element 4a is placed radially behind the collar on the socket element 6'a. The luminaire is then held in the socket elements 6'a and 6'b by frictional force due to the spring force and by positive locking due to the collars.

[0054] The Fig.Figure 7 further clarifies that the luminaire can be rotated around the central longitudinal axis while being enclosed in the socket elements 6'a and 6'b. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2022 127 156 A1

[0003]

Claims

[1] Luminaire comprising a housing extending longitudinally in an axial direction (1), a. in particular comprising a rod-shaped or tubular housing (1), preferably which is at least partially circular-cylindrical, wherein a plurality of light sources (3), preferably LED-based light sources (3), are arranged in the housing (1), which are adjacent to one another in the axial direction, and the housing (1) has at least one light emission opening (5) in a housing wall area, through which light generated by the light sources (3) can be emitted transversely to the axial direction, wherein the housing (1) has electrical contact elements (4a, 4b) with which the light sources (3) and / or electronics arranged in the housing can be energized, characterized by, that the contact elements (4a, 4b) are formed by a first and a second contact element (4a, 4b), wherein the first contact element (4a) forms a part of the axial end face of the housing (1) at its first axial end and the second contact element (4b) forms a part of the axial end face of the housing (1) at its second axial end. [2] Luminaire according to claim 1, characterized by that the light fixture is viewed in axial projection a. has a cross-sectional shape and size that the luminaire has at its two axial ends, and / or b. has a rotationally symmetric or at least rotationally symmetric cross-sectional shape, preferably a circular or polygonal cross-section. [3] Luminaire according to any of the preceding claims, characterized by, that each of the contact elements (4a, 4b) is rotationally symmetric or at least rotationally symmetric about the central longitudinal axis (9) of the housing (1). [4] Luminaire according to any of the preceding claims, characterized by , that a. one of the contact elements (4a) has a metallic contact surface area which comprises an annular outer sub-area (4a1) which surrounds a central inner sub-area (4a2) which projects beyond the outer sub-area (4a1), and b. the other contact element (4b) comprises a metallic contact surface area that lies completely in the same plane or that comprises an annular outer sub-area (4b1) that surrounds at least one centric sub-area (4b2) that is level with the outer sub-area (4b1), in particular by which the contact elements (4a, 4b) are designed corresponding to battery contacts of circular cylindrical battery cells, especially of battery cells that comply with the IEC-60086 standard. [5] Luminaire according to any of the preceding claims, characterized by , that both contact elements (4a, 4b) are surrounded by an annular insulating element (8a, 8b), in particular wherein the contact element (4a, 4b) and the insulating element (8a, 8b) are materially bonded to each other, in particular wherein the contact element (4a, 4b) is embedded with an outer edge region in the insulating element (8a, 8b). [6] Luminaire according to claim 5, characterized by , that the insulating elements (8a, 8b) are attached to the annular axial end faces of the housing (1), preferably by bonding, in particular by gluing. [7] Light according to 5 or 6, characterized by, that the insulating element (8b) of one of the contact elements (4b), in particular of the contact element (4b) according to claim 4b), has an axially projecting annular collar (8b2), in particular one that points away from the housing (1), wherein the contact element (4b) lies in the direction of the housing (1) below the plane of the annular axial end face of the collar (8b2), in particular at a distance below the plane of the annular axial end face of the collar (8b2) which is greater than the extent by which the other contact (4a), in particular the contact (4a) according to claim 4a, rises above its insulating element (8a). [8] Luminaire according to any one of the preceding claims 5 to 7, characterized by, that on the side of each insulating element (8a, 8b) facing the interior of the housing (1) two spaced-apart guide elements (7) are formed on the insulating element (8a, 8b), between which an axial end of at least one circuit board arranged in the housing lies, preferably a single circuit board (2) extending through the entire housing (1) which carries the light sources (3). [9] Luminaire according to any one of the preceding claims 5 to 8, characterized by , that on the side of each insulating element (8a, 8b) facing the interior of the housing (1) an electrical contact tab (4a3, 4b3) of the contact element (4a, 4b) protrudes in an axial direction, in particular passing through the material of the insulating element (8a, 8b). [10] Luminaire according to any of the preceding claims, characterized by, that the contact elements (4a, 4b) of the luminaire can be contacted by such external contact surfaces (6a, 6b) which are provided for electrical contacting cylindrical battery cells that comply with the IEC-60086 standard, in particular battery cells of sizes R6 / R14505 / AA / LR6 or R03 / R10445 / AAA / LRO3 or R14 / R26500 / C / LR14 or R20 / R34615 / D / LR20. [11] System comprising a luminaire according to one of the preceding claims and two socket elements (6'a, 6'b) spaced apart in the axial direction of the luminaire extension, wherein a first socket element (6'a) comprises a contact surface (6a) that is not compliant in the axial direction, to which a first contact element (4a) of the luminaire can be electrically connected, and wherein the second socket element (6'b) comprises an axially compliant contact surface (6b) that is subjected to force in the direction of the luminaire, in particular formed by the end of a spring element, with which the second contact element (6b) of the luminaire can be contacted and an axial force can be exerted on the luminaire, with which the luminaire can be held at least frictionally between the socket elements (6'a, 6'b). [12] System according to claim 11, characterized by, that at least one of the socket elements (6'a, 6'b), preferably both, has a form-fitting structure with the outer surface of the luminaire and / or an axial end of the luminaire, with which the luminaire is additionally secured by form-fitting. [13] System according to claim 11 or 12, characterized by , that the two mounting elements (6'a, 6'b) are connected to each other to form a single unit, in particular that they are joined together in one piece. [14] Use of contact elements (4a, 4b) which correspond in shape to the axial end contact elements of circular cylindrical battery cells, in particular battery cells according to standard IEC-60086, preferably of sizes R6 / R14505 / AA / LR6 or R03 / R10445 / AAA / LRO3 or R14 / R26500 / C / LR14 or R20 / R34615 / D / LR20, for the power supply of axially extended luminaires, in particular according to one of the preceding claims 1-10. [15] Use of contact surfaces (6a, 6b) provided for contacting battery cells, in particular battery cells according to standard IEC-60086, for contacting an axially longitudinally extended lamp, in particular according to one of the preceding claims 1-10.

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