Portable light for use in potentially explosive atmospheres with replaceable mounting sleeve for electronic components

Abstract

Portable light for use in potentially explosive atmospheres, with a) at least one storage device (B) for electrical energy, b) Light sources (L3) for generating light (F8, F9) using the electrical energy of the storage device (B), c) a lens (L5) with a lens body (L50) made of a light-guiding material, wherein the lens body (L50) has at least one light-entry surface (L51; L511, L512, L513) and one light-emission surface (L53) for emission from the luminaire for the light (F8, F9), and d) an encapsulated carrying sleeve (L2) containing electronic components (L232, L241, L251) for controlling the light sources (L3) and powered by the electrical energy storage device (B), wherein e) the light sources (L3) are arranged on the encapsulated support sleeve (L2) in the direction of a light entry surface (L51; L511, L512, L513) of the lens body (L50), and f) the encapsulated carrying sleeve (L2) with the light sources (L3) forms a compact unit that is removable and replaceable.

Description

[0001] The invention relates to a mobile light which can be used particularly by rescue workers, e.g., firefighters, even in potentially explosive atmospheres. Such a light can be operated by hand by an emergency responder and, if necessary, also handled manually. In practice, it may also be necessary for an emergency responder to keep their hands free for operational tasks. Portable lights of this type can therefore often be attached to protective clothing or a personal protective helmet using special mounts, i.e., in particular as a mobile helmet light.

[0002] A light of the type described above must be used by rescue personnel, such as firefighters, even during operations in potentially explosive atmospheres, for example, when a rescuer enters an empty fuel tank. The design of the lights must ensure a high degree of sealing and thus protection against the ingress of explosive substances. In particular, the housing of a light must be shielded in such a way that the live components inside cannot ignite explosive substances. Such lights undergo special testing to ensure their use by rescue personnel in potentially explosive atmospheres is deemed permissible.

[0003] Luminaires of the aforementioned type can be certified in accordance with an ATEX directive. The acronym ATEX stands for "Atmosphères Explosives" (Explosive Atmospheres) and refers to directives issued by the European Union in the field of explosion protection. Examples include the ATEX Product Directive 2014 / 34 / EU and the ATEX Workplace Directive 1999 / 92 / EC. These directives classify luminaires, for example, as belonging to equipment group II. This group comprises devices for use in potentially explosive atmospheres containing dust and gases. Because such luminaires must be usable continuously, frequently, or for extended periods in potentially explosive atmospheres, the requirements for their design, particularly their resistance to the ingress of explosive substances, are stringent.Luminaires according to the invention, which are intended for continuous, frequent or prolonged use in potentially explosive atmospheres, can be classified in equipment group II and category 1 therein according to the ATEX Directive.

[0004] With a luminaire of this type, it is generally not permissible for the user to carry out repairs themselves. Intervening in the interior of a luminaire poses a risk of exposing or damaging live components, making it uncertain whether a permanent seal against potentially explosive dust and gas atmospheres can be reliably restored to, for example, electrical and electronic components, wiring, connectors, and the like, after reassembly.

[0005] A professional repair of such a light fixture is therefore generally only possible for the manufacturer and involves considerable effort. Furthermore, a repaired light fixture often requires extensive re-testing to ensure it meets the necessary sealing requirements for use in potentially explosive atmospheres. Otherwise, the light fixture may lose its suitability for use in such areas, for example, its certification according to the ATEX directive.

[0006] A CN 118896265 A patent discloses an explosion-proof flashlight. This flashlight comprises a lamp tube, a lamp socket, and a button. The lamp tube has an interior space to house a control unit and a power supply unit. An explosion-proof structure is located between the control unit and the power supply unit. To achieve explosion protection, this structure can be a segmented sealing system that encapsulates the control component and battery component with potting compound, sealing them independently. This improves reliability and allows for independent replacement and maintenance of the control component and battery component.

[0007] The invention is based on the objective of further developing a lamp intended for use in potentially explosive atmospheres in such a way that a user is able to access the interior of the lamp without compromising the suitability of using the lamp in potentially explosive atmospheres.

[0008] The problem is solved by the luminaire specified in claim 1. Advantageous further embodiments of the invention are specified in the dependent claims.

[0009] The invention, its associated advantages, and further advantageous embodiments are explained in more detail below with reference to the briefly mentioned figures. These figures show Fig. 1 a cross-section through a particularly advantageous, exemplary embodiment of a portable lamp according to the invention, Fig. 2a a detailed view of a section through the exemplary execution according to Fig. 1 in the area of ​​the light source and the lens with the lens body, wherein an exemplary main light source is active to generate a primary light, Fig. 2b an exemplary, from the primary light of the active main light source according to the detailed view in Fig. 2a. Photograph produced in a viewing plane, Fig. 3a a detailed view of a section through the exemplary execution according to Fig. 1 in the area of ​​the light source and the lens with the lens body, wherein advantageously two exemplary secondary light sources are active for generating a secondary light with particularly signaling properties, and Fig. 3b an exemplary, from the secondary light of the active secondary light sources according to the detailed view in Fig. 3a Light image produced in a viewing plane, whereby the main light source is deactivated.

[0010] An exemplary and particularly advantageous embodiment of a portable lamp according to the invention, suitable for use in potentially explosive atmospheres, is shown in Fig. 1 shown in cross-section. Fig. 2a and Fig. Figure 2b shows excerpts of exemplary light paths of a primary light emitted by the lamp and an example of a light pattern produced by it. Fig. 3a and Fig. Figure 3b further shows exemplary ray paths of a secondary light emitted by the lamp and an exemplary image produced by it.

[0011] A portable lamp according to the invention is at least equipped with at least one storage device for electrical energy, e.g. a battery or a rechargeable accumulator.

[0012] Thus, the example of Fig. The portable lamp shown in Figure 1 incorporates at least one storage device B for electrical energy. A compartment G11 is provided for its storage. A battery B with a battery body B1 is shown as an example, featuring a positive terminal at a battery head B2 and a negative terminal at a battery base B3.

[0013] Light sources are used to generate light using the electrical energy stored in the battery. The primary function of this light is to illuminate the area of ​​view and action in front of an emergency responder. This can also be referred to as primary light.

[0014] In the example of the figures, light sources L3 are present to generate light. In the case of the Fig. 1, Fig. 2a, Fig. In the example shown in Figure 3a, a main light source L31 is provided for generating a primary light F8. Advantageously, this can be a white light-emitting diode (LED) arranged in a central main axis of symmetry S1 of the luminaire. This allows a preferably continuous main luminous flux, also called primary light, to be generated. This is emitted through the light-exit aperture L7 of the luminaire. Fig. Figure 2b shows an exemplary photographic image for a primary light F8 in one viewing plane, which is determined by the luminous flux of the main light source L31 in Fig. 1 or 2a is generated.

[0015] If required, the light sources can also be designed to produce at least one additional secondary light source besides the primary light. This secondary light can have signaling properties.

[0016] In the example shown in the figures, the light sources L3 are designed in such a way that, in addition to the primary light F8, they produce at least one further secondary light F9. In the example shown in the Fig. 1, Fig. 2a, Fig. In the example shown in Figure 3a, additional secondary light sources L32 and L33 are advantageously provided. These can advantageously be two red-emitting light-emitting diodes (LEDs). In the example shown in the figures, these are arranged on both sides of the preferably central main light source L31 in an orthogonal plane E3 radial to the central axis of symmetry S1 of the luminaire, which can also be referred to as a light emission plane. The secondary light generated by the secondary light sources L32 and L33 preferably has signaling properties. This can be signaled in particular by a different color of the secondary light, e.g., red-emitting LEDs. This preferably serves to indicate critical states of the luminaire according to the invention, especially to signal an undervoltage of the electrical energy storage device. This allows a user of the luminaire to, for example, take timely action.The need for an upcoming replacement or recharging of energy storage device B will be pointed out.

[0017] Depending on the design, the secondary light can either overlap with the primary light, so that primary and secondary light are emitted simultaneously through the light outlet L7. Alternatively, the secondary light can also be emitted as an alternative to the primary light, e.g., alternating with the primary light according to an application-dependent switching sequence, i.e., in the manner of a pulsating warning light. In the example of the Fig. Figure 3b shows an exemplary photograph in one viewing plane, which is determined by the luminous flux of the secondary light F9 of the secondary light sources L32, L33 in Fig. 1 or 3a is generated in place of a primary light F8.

[0018] The portable lamp according to the invention is further equipped with a lens having a lens body made of a light-conducting material. The lens body has at least one light-intake surface and one light-emission surface for emission from the lamp, particularly for primary and secondary light.

[0019] According to the illustration in the example of Fig. Figure 1 of the portable lamp according to the invention comprises a lens L5 with a lens body L50 made of a light-conducting material. The lens body L50 has at least one light-intake surface L51 and one light-emission surface L53 for emission from a light-emission opening L7 of the lamp, for the light emitted by the light sources L3, in particular for emitted primary light F8 and secondary light F9.

[0020] The portable lamp according to the invention has a lens L5 with a lens body L50 having a rotationally symmetrical shape about a central optical axis, in the example shown in the figures about an axis of symmetry S1. Light, in particular both primary and secondary light, is emitted from the light sources into the lens body L5 via an intermediate, encapsulated illumination area L4 and coupled out of the lens body L50 via a light exit surface L53 and emitted into the surroundings.

[0021] In the portable lamp according to the invention, the light is emitted into the surroundings along the axis of symmetry S1 of the lamp body, directly towards the field of vision, action, and movement of a person who is carrying the lamp, for example, in one hand or has it attached to a safety helmet. This offers the particular advantage that, in addition to the primary light, the person can also quickly and reliably perceive a sudden appearance of signaling secondary light, since this is emitted in the same beam path as the primary light and is therefore within the person's direct field of vision. A person can thus perceive signaling secondary light, for example, even when the lamp according to the invention is attached to or mounted on a safety helmet.

[0022] According to the invention, no separate openings in the housing of the luminaire are required for the emission of signaling secondary light. This increases safety, particularly when used in potentially explosive atmospheres. Instead, signaling secondary light is emitted in the same way as primary light via the central light-emitting surface at the top of the luminaire.

[0023] The example particularly highlights the Fig. 2a and Fig. Figure 3a shows a preferred embodiment of a portable lamp according to the invention, comprising a lens L5 with a lens body L50, which is particularly advantageously designed as a collimator lens with a rotationally symmetrical shape about a central optical axis, in the example shown in the figures about the axis of symmetry S1. The light-entry surface L51 of the lens L5 faces the encapsulated illumination area L4. This area extends between a light emission plane E3 with the light sources L3 and the curved outer surface of the lens body L50 opposite the outer light emission surface L53. Advantageously, the curved surface on the lens body L50 facing the interior of the portable lamp according to the invention is designed as a light-entry surface L51 with total internal reflection (TIR).The light emitted from behind by the light sources L3 onto the outer surface of the lens body can be almost completely coupled into the interior of the lens body, which preferably consists of a glass body that is as clear as possible. This results in no or only minimal losses of stray light, which would otherwise be reflected back towards the light sources L3. This volume area inside the luminaire, also referred to as the encapsulated illumination area, is described in the following sections. Fig. 1, Fig. 2a and Fig. 3a is marked with the reference symbol L4.

[0024] In the Fig. 1, Fig. 2a and Fig. In the embodiment shown in Figure 3a, the lens body L50 of the luminaire according to the invention has a light entry surface L51 for light in the encapsulated illumination area L4. This surface advantageously extends over an outer light entry surface L511 for a secondary light F9 and at least a first inner light entry surface L513 for a primary light F8. In the example shown in the figures, the light entry surface L51 faces an encapsulated illumination area L4, which extends between a light emission plane E3 with the light sources L3 and the curved outer surface of the lens body L50 with total internal reflection (TIR), located opposite the outer light exit surface L53.

[0025] In the example shown in the figures, a primary light F8, emitted by a central main illuminant L31 arranged on the axis of symmetry S1, can be particularly advantageously coupled into a first inner light-entry surface L513. This region of the lens body L50's outer surface advantageously has the form of a preferably aspherically curved, lens-like projection and represents a surface region of the lens body L50 that is also rotationally symmetrical about the axis of symmetry S1. The volume region between a emission surface on the top of the main illuminant L31 and the first inner light-entry surface L513 is part of the encapsulated irradiation area L4. This can also be referred to as the inner irradiation space L4b, particularly for primary light.

[0026] According to a particularly advantageous further embodiment of the invention, which is described in the Fig. 1, Fig. 2a and Fig. As already shown in Figure 3a, the first inner light entry surface L513 is also arranged rotationally symmetrically about the axis of symmetry S1 in a pot-shaped recess L514. Such an arrangement is particularly common in Fig. 2a is shown in detail. The preferably aspherically lenticular curved elevation of the first inner light entry surface L513 is set into the base of the pot-shaped depression L514.

[0027] This allows a particularly dome-shaped emission area of ​​the main light source L31 to project into the interior of the cup-shaped recess L514 and be at least partially enclosed by its wall. This has the advantage that the main light source L31 and the lens body L50 can be positioned almost concentrically on the axis of symmetry S1. This shortens the length of the portable light according to the invention along the axis of symmetry S1. The volume area of ​​the encapsulated emission area L4 enclosed by the cup-shaped recess L514 then essentially forms the inner emission chamber L4b for the primary light F8.

[0028] In another embodiment, also already shown in the figures, the cup-shaped recess L514 is conically narrowed towards the light exit surface L53 of the lens body L50. This has the further advantage that its wall forms a second inner light entry surface L512 with a reflector surface rotationally symmetrical about the axis of symmetry S1 and exhibiting total internal reflection (TIR) ​​for further coupling of primary light F8. Such an embodiment, in which the inner light entry surface L51 extends over two preferably adjacent first and second inner light entry surfaces L512 and L513, has the particular advantage that primary light F8 can be coupled into the lens body L50 almost completely, i.e., without losses due to reflected scattered light.

[0029] In the embodiment shown in the figures, this effect is further enhanced by the fact that the dome-shaped emission area of ​​the main light source L31 of the light source L3 is arranged in the central axis of symmetry S1 and inside the pot-shaped recess L514, i.e., it is encompassed by the conically narrowed walls L512 of the recess L514.

[0030] Fig. 2b shows an exemplary, from the primary light F8 of the active main light source L31 according to the detailed view in Fig. 2a. Light image produced in a projection plane. In particular, depending on the respective dimensions of a practical embodiment of the portable lamp according to the invention, such a light image with an approximately circular cross-section can be advantageously projected onto a viewing plane, for example, at a distance of, for example, 1.5–2 m between the light-emitting surface L53 on the outside of the lens body L50 and the projection plane, for example, in Fig. 2b will be generated.

[0031] In the example of the Fig. 2a, Fig. 2b For clarity, the secondary light sources L32 and L33 are deactivated. Depending on the specific application, however, the secondary light sources can also be activated simultaneously, or the secondary and main light sources can be active in an alternating cycle according to a lighting program. Advantageous further developments of the portable lamp according to the invention will be explained in more detail below.

[0032] In Fig. Figure 2a schematically illustrates how primary light F8 is coupled into the lens body L50 via the inner light entry surfaces L512 and L513, guided within the lens body, and finally coupled out again at the light exit surface L53 of the lens body L50. The cross-sectional representation of Fig. 2a strichlierten Verläufe F81 bis F85 eines Primärlichts F8 vorrangig der Veranschaulichung. Diese stellen räumlich gesehen beispielhafte Lichtkegel F81 bis F85 im Linsenkörper sowie im Bereich zwischen der Lichtaustrittsfläche L53 und der Projektionsebene in der Blattfläche von Fig. 2b represents symbolic outer boundaries of the same in the section plane of the Fig. 2b are symbolically represented there in the form of concentric circles around the center point S1 and are also provided with the reference symbols F81 to F85.

[0033] Thus, in Fig. 2a der beispielhafte Lichtkegel F81 über die konische Wandung L512 der topförmigen Vertiefung L514 mittels optischer Brechung in den Linsenkörper L50 eingekoppelt, und über die annähernd kreisförmige Lichtaustrittsfläche L53 mittels optischer Brechung wieder ausgekoppelt. Trifft dieser auf eine Projektionsfläche, zB die Blattebene in Fig. 2b, this limits an approximately circular light spot F81, which in practice is usually diffuse at the edge, which in Fig. 2b cannot be represented. In the example of the Fig. 2a The light cones F82 and F83 are also coupled into the lens body L50 via the conical wall L512 of the top-shaped recess L514 by means of optical refraction. In the lens body L50, these are reflected on the inside in the area of ​​the outer light entry surface L511 and then coupled out again via the light exit surface L53 by means of optical refraction. Finally, in the example of the Fig. 2a die Lichtkegel F84 und F85 über die linsenförmig gekrümmte Erhebung der ersten inneren Lichteintrittsfläche L513 am Grund der topförmigen Vertiefung L514 mittels optischer Brechung in den Linsenkörper L50 eingekoppelt und über die Lichtaustrittsfläche L53 mittel optischer Brechung wieder ausgekoppelt.

[0034] In the exemplary embodiment of the luminaire according to the invention shown in the figures, the light-entry surface L51 on the lens body L50 also comprises a separate outer light-entry surface L511. This preferably has a reflector surface rotationally symmetrical with respect to the axis of symmetry S1 of the lens body L50, also with total internal reflection TIR. This allows a secondary light F9, which is emitted by at least one additional secondary light source of the light source L3, to be coupled in with virtually no loss.

[0035] This design offers the advantage that primary and secondary light can be emitted together through the central light-emitting surface L53 on the outer surface of the lens body L50. Both light types can simultaneously strike a projection surface and are easily observable by a user without changing their viewing direction. This is particularly advantageous when using the luminaire according to the invention as a helmet light, for example, on a personal protective helmet.

[0036] Advantageously, the luminaire according to the invention can also be further designed such that a secondary light F9 is particularly clearly perceptible to a user compared to the primary light F8. Distinguishing between the light types can be achieved, for example, by having the secondary light F9 and the primary light F8 have different colors. Thus, the primary light F8 can be generated, for example, by a high-performance, white light-emitting diode in the form of a primary light source. In contrast, secondary light F9 can be generated, for example, by a red light-emitting diode in the form of a secondary light source. Furthermore, different light patterns from the two light sources can also be produced by different arrangements of the primary and secondary light sources in the light emission plane E3. An exemplary embodiment of this is described below using the [reference to be added]. Fig. The photograph shown in 3b explains the arrangement in Fig. 3a is caused.

[0037] In the example of the Fig. 1, Fig. 2a and Fig. 3a The secondary light sources are particularly advantageously represented by two light-emitting diodes L32, L33, which are preferably placed radially on both sides next to the main light source L31 in a plane orthogonal to the axis of symmetry S1. Such an arrangement is particularly advantageous in Fig. Figure 3a shows a detailed cross-section through the portable lamp according to the invention. The light-emitting diode L32, for example, emits red secondary light F9 into a lower region of the outer light-entry surface L511 on the surface of the lens body L50. Furthermore, the light-emitting diode L33 emits additional secondary light F9 into an upper region of the outer light-entry surface L511, which is positioned relative to the axis of symmetry S1 as a mirror image of the lower region.

[0038] The annular volume area between the emission surfaces on the upper sides of the secondary light sources L32, L33 and the outer light entry surface L511 represents a further part of the encapsulated illumination area L4. This can also be referred to as the outer illumination space L4a, particularly for secondary light F9, and for primary light.

[0039] Fig. 3b shows an exemplary secondary light source F9 of the two active secondary light sources L32, L33 according to the detailed view in Fig. 3a Light image produced in a projection plane. For better clarity, the main light source L31 is deactivated, and the projection plane and the leaf plane of Fig. 3b coincide. Depending on the specific application, however, the main light source can also be activated simultaneously, or the secondary and main light sources can be active in an alternating cycle according to a lighting program. Advantageous further developments of the portable lamp according to the invention will be explained in more detail below.

[0040] In Fig. Figure 3a schematically illustrates how secondary light F9 is coupled into the lens body L50 via the outer light entry surface L511, guided within the lens body, and finally coupled out again at the light exit surface L53 of the lens body L50. The cross-sectional representation of Fig. 3a Dashed lines F91a, F91b, F92a and F92b of the secondary light are primarily for illustration.

[0041] Depending on the specific dimensions of a practical embodiment of the portable lamp according to the invention, such a light image can be advantageously projected onto a viewing plane, for example, at a distance of, for example, 1.5–2 m between the light-emitting surface L53 on the outside of the lens body L50 and the projection plane, for example, in Fig. 3b. This offers the advantage that the light pattern can be perceived by an operator without having to look directly into the light-emitting surface L53. Furthermore, the light pattern can also be perceived when using the luminaire according to the invention, e.g., as a helmet light, if it happens to fall on a nearby, passing surface during a movement of the operator.

[0042] Fig. 3b serves as a projection plane for two exemplary light images F91, F92, which are generated by the secondary light F9 of the secondary light sources L32, L33 in Fig. 3a will be generated.

[0043] This is done according to the description in Fig. 3a The light from the secondary light source L32 in the outer illumination chamber L4a of the encapsulated illumination area L4 is directed onto a part of the curved light entry surface L51 on the surface of the lens body L50 and, in particular, coupled into the lens body L50 in the lower region of the outer light entry surface L512 by means of optical refraction. The light path that subsequently propagates in the lens body L50 has, spatially speaking, approximately the shape of a thick circular arc or a crescent. The lateral boundaries of this light path are in the cross-sectional plane of the Fig. 3a is symbolized by the dashed lines F91a and F91b. The light gradient in the upper area of Fig. 3a is coupled out via the approximately circular light-exit surface L53 by means of optical refraction. When this strikes a projection surface, e.g. the plane of the leaf in Fig. 3b, this limits an approximately arc- or crescent-shaped light spot F91 in the upper area of Fig. 3b. The edges of the arcs F91a and F91b are diffuse, which is indicated in Fig. 3b cannot be represented.

[0044] Accordingly, the further exemplary crescent-shaped photograph F92 is shown in the lower part of Fig. 3b is caused by the secondary light source L33. This is symbolically limited by the arcs F92a and F92b. Thus, in Fig. 3a The light from the secondary light source L33 is directed onto a portion of the curved light-entry surface L51 in the outer illumination chamber L4a and coupled into the lens body L50 in the upper region of the outer light-entry surface L512 by means of optical refraction. The resulting light path has, spatially speaking, approximately the shape of a thick circular arc or crescent. The lateral boundaries of this light path are defined in the cross-sectional plane of the Fig. 3a is symbolized by the dashed lines F92a and F92b. The light gradient is shown in the lower area of Fig. 3a is coupled out again via the approximately circular light exit surface L53 by means of optical refraction. When this hits a projection surface, e.g. the plane of the leaf in Fig. 3b, this limits the approximately arc- or crescent-shaped light spot F92 in the lower area of Fig. 3b. The edges of the arcs F92a and F92b are also diffuse, which is in Fig. 3b cannot be represented.

[0045] As already explained, the main and secondary light sources can be operated in such a way that primary and secondary light are emitted simultaneously, and the resulting light images on a projection plane overlap, e.g., the light images in Fig. 2b and Fig. 3b. Secondary light can also be emitted as an alternative to primary light, e.g., alternating with the primary light according to an application-dependent switching sequence, i.e., in the manner of a pulsating warning light. In both cases, the secondary light sources serve as signal lights, and the secondary light generated when activated has the function of signaling.

[0046] According to the invention, the portable lamp has electronic components which serve to control the light source and are powered by the electrical energy storage device.

[0047] In a particularly advantageous embodiment, the portable lamp according to the invention has electronic components that also monitor the energy content of the at least one electrical energy storage device and activate the light source to generate a secondary light when the monitoring detects that the energy content in the storage device has fallen below a minimum value. A user of the lamp can thus be alerted in good time to the need to replace or recharge the energy storage device. If the portable lamp according to the invention is used, for example, by emergency services, they can, upon receiving such a warning, leave a danger zone in good time or recharge the electrical energy storage device before entering a danger zone. Fig. Figure 1 shows such an embodiment of the portable lamp according to the invention. Symbolically represented electronic components L232, L241, and L251 monitor the energy content of the electrical energy storage device B. If a drop below a minimum energy level is detected, such that the main light source L31 can only operate for a short time, secondary light sources are activated to generate a secondary light F9; in this example, the secondary light sources L32 and L33.

[0048] Advantageously, the electronic components can control the light sources L3 in such a way that a secondary light F9 exhibits signaling properties, e.g., it is alternately switched on and off. The electronic components can also control the light sources, for example, in such a way that the generation of the primary light F8 is switched off for the duration of the activation of a secondary light F9. In practice, depending particularly on the specific application of the luminaire according to the invention, different switching cycles of the secondary light, as well as of primary and secondary light, can be programmed into the electronic components and activated upon detection of a drop below a minimum value in the energy content of an electrical energy storage device.

[0049] According to the invention, the portable lamp has an encapsulated carrying sleeve for housing the electronic components, which serve to control the light sources and are powered by the electrical energy storage device. The encapsulated carrying sleeve and the light sources form a compact unit. Advantageously, the light sources are arranged directly on one side of the encapsulated carrying sleeve, bordering the encapsulated illumination area, facing the at least one light-entry surface of the lens body.

[0050] This embodiment according to the invention has the particular advantage that all electronic components and light sources, in particular light-emitting diodes, form a compact unit and can be removed and replaced as a single unit if necessary. The remaining components of the lamp, i.e., in particular a handle G with a battery and a lamp head L with the lens L5, can be reused after replacement.

[0051] If the encapsulated carrying sleeve with the light sources as a separate component independently meets the requirements of the ATEX certification and is approved for continuous, frequent or prolonged use in potentially explosive dust and gas atmospheres, then this component as well as the electrical energy storage can be replaced by the user in the event of a defect without invalidating or significantly impairing the ATEX certification of the entire luminaire.

[0052] Advantageously, the encapsulated carrying sleeve is filled with a material that has electrically insulating or thermally conductive properties. Advantageously, at least one electrical energy storage device is housed in a separate handle and in a shaft provided for its reception. The handle is electrically coupled to the light head in a gas- and dust-tight manner. The light head contains at least the light sources for generating light, in particular primary and secondary light, as well as the lens with its lens body.

[0053] This design offers the advantage that the lamp is two-part, and the two parts, i.e., the handle and the lamp head, can be easily separated, for example, to replace the electrical energy storage device or to replace the encapsulated carrying sleeve, for example, if a light source fails. The two-part design offers the further advantage that the handle, the lamp head, and especially the connection between the handle and the lamp head can be easily designed in such a way that the portable lamp according to the invention can be used in potentially explosive atmospheres. In particular, the connection between the handle and the lamp head, as well as the internal structure of the lamp head, are designed to be gas- and dust-tight, enabling continuous, frequent, or prolonged use of the lamp in potentially explosive dust and gas atmospheres in accordance with the requirements of ATEX certification.

[0054] The light according to the invention is particularly suitable for use as a helmet light, either permanently attached to a personal protective helmet or detachably by means of special mechanical clamping devices. Advantageously, the handle and the light head can have a cylindrically elongated shape along an axis of symmetry, so that the light can be adjusted manually on a protective helmet, preferably on the side edge of the helmet, in the direction of a person's gaze. If necessary, the light can also be removed by a person and operated by hand.

[0055] Fig. Figure 1 shows an exemplary portable lamp designed according to the invention. It essentially consists of a handle G, an energy storage device inserted therein, in particular a battery B, and a lamp head L screwed onto it. The lamp is preferably rod-shaped and extends along an axis of symmetry S1. For clarity, the handle G and the battery B inserted therein are shown in foreshortened form by means of a break line S2.

[0056] The handle G can advantageously be a cylindrical container, particularly a semi-open one. This container has a shell G1, particularly with a sleeve-like shape, and includes a shaft G11 for an electrical energy storage device, e.g., a battery B. The shell G1 is closed on one side by a bottom G2. In the example of the Fig. 1 on the left side. In a header area G3 on the opposite side, in the example of the Fig. On the right side, the casing G1 is open on one side and has an insertion opening G31 for an electrical energy storage device in the shaft G11. In the example of the Fig. A battery B is inserted in the battery body. A negative terminal of the battery is located at the base B3 of the battery body B1 and is electrically connected via a spring contact G22 to a contact area G21 on the inside of the base G2. At the opposite end of the battery body B1 is a battery head B2 with a positive terminal.

[0057] The outer surface of the sheath G1 of the handle G is designed as a gripping area and is provided, for example, with a grippy, non-slip surface. Fig. 1 This is symbolized by a ring-shaped recess G15 between the base G2 and the head area G3. This can also be used as a clamping area for a holding device, e.g. a releasable clamp for fixing the light, especially to an edge of a personal protective helmet.

[0058] The connection of handle G and light head L is shown in the example of the Fig. 1 via a thread G14, which is arranged on the outside of the casing G1 in the head area G3 around the insert opening G31. A mating thread on the inside of an engagement chamber L1 of the light head L can engage into this. In the example of the Fig. 1. The open intervention space L1 is located at the left end of the light head L. In the connected state of handle G and light head L, this encompasses the head area G3 of the handle G. In the example, the... Fig. 1. A ring-shaped insert recess G12 for a seal G13, e.g. a white silicone O-ring. This allows a tight connection between the light head L and the handle G to be achieved, preventing the ingress of gases and dust and, in particular, meeting the requirements of the ATEX Directive.

[0059] The upper end of the head area G3, in the example of the Fig. The contact surface G32 on the right side of the handle G also forms an annular contact surface. This surface is electrically connected, in particular via the material of the handle G and the spring contact G22, to the negative terminal B3 of the energy storage device B. The battery head B2, located at the opposite end of the battery body B1 and containing the positive terminal, can be electrically connected to the encapsulated support sleeve L2 in the light head L, specifically to a contact surface L231 on the underside of an exemplary first circuit board L23, by rotating the handle G via the thread G14. This provides power to the electronic components in the light head L and enables the operation of the light source L3. The light can thus be switched on and off in a known manner by rotating the light head L relative to the handle G.

[0060] In Fig. 1. Cross planes E1 to E9 are symbolically marked by the exemplary light head L for better clarity.

[0061] The transverse plane E1 at the left end of the light head L marks the end of an open access space L1. The head section G3 of the handle G can be screwed into this space via a thread G14. In this way, the positive terminal B2 of a battery B inserted into the compartment G11 can be electrically connected to the underside L231 of a first circuit board L23, and the negative terminal B3 of the battery can be electrically connected via the contact area G21 on the base G2, the conductive housing material of the casing G1, and the annular contact surface G31 on the head section G3 to the housing material of the light head L.

[0062] In the example, the area between the transverse planes E2 and E3 extends Fig. 1. The encapsulated support sleeve L2 for the electronic components and the light sources L3. This sleeve is cylindrical and gas- and dust-tight. The electronic components protected within it can be, for example, integrated circuits and programmable controllers, particularly for controlling the light sources and, for example, for monitoring the energy reserves of the storage unit B. The transverse plane E2 marks the transition between the access chamber L1 and the left underside L231 of the support sleeve L2. The transverse plane Q3 on the right upper side of the support sleeve L2 designates the light emission plane E3 with the light sources L3, in this example... Fig. 1 a main light source L31 for generating a primary light and the radially adjacent secondary light sources L32, L33 for generating signaling secondary light.

[0063] The left end L20 of the support sleeve L is the contact surface for the battery positive terminal and a ground connection. A first circuit board L23 is provided with contacts on its underside L231, e.g., for the battery positive terminal. On its upper side are exemplary first electronic components L232, which can be used, for example, for battery monitoring, voltage control, and power supply to the light source. Inside the support sleeve L are, for example, a first potting compartment L21 and a second potting compartment L22, which are separated by an intervening second circuit board L24. The second circuit board L24 carries, for example, second electronic components L241, e.g., for light control, especially for the main light source L31 and the signal lights L32 and L33. The potting compartments are, for example, filled with electrically insulating and thermally conductive potting compounds LM.A third circuit board L25 is provided on the side facing the second potting compartment L22 of the encapsulated support sleeve L2 with exemplary third electronic components L251, which serve, for example, for the electrical control of the light sources. An electrical power and control signal transmission line L233 runs through the potting compartment L21 between the first and second circuit boards L23, L24. Another electrical power and control signal transmission line L242 runs through the potting compartment L22 between the second and third circuit boards L24, L25. The top surface of the third circuit board L25 at the front end of the support sleeve, which is associated with the encapsulated illumination area L4, serves for the electrical contact of the light sources L3, especially the main light source L31 and the signal light sources L32, L33. The top surface L26 in the transverse plane E3 serves as the light emission plane.

[0064] The transverse plane E4 marks a support ring at the right end of a stop sleeve L27 of the encapsulated support sleeve L. The support sleeve L comprises the light source L3, the lens body L51, and, located between them, the encapsulated illumination area L4. The right end of the stop sleeve L27 is located in the example of the Fig. 1 on the inside of an annular contact surface that runs inside the housing of the light head L between the transverse planes E4 and E5. The outer side of the annular contact surface in the transverse plane E5, located in the area of ​​the light emission aperture L7 of the luminaire according to the invention, also serves as a support for the lens L5, in particular via a support ring L52 at the front end of the lens body L50. Advantageously, a seal L521, e.g., a white silicone O-ring, is placed there to seal the encapsulated illumination area L4 and the encapsulated support sleeve L2 against the ingress of gases and dusts, in particular those that are potentially explosive. A lens holder L6, which can be screwed onto the light head L, rests in the transverse plane E8 at the upper end of the light head L and engages the outer edge of the support ring L52 in the transverse plane E6. This prevents the lens L4 from falling out and enables an explosion-proof seal.The lens holder L6 comprises the light-emitting surface L53 in the transverse plane E7 and the light-emitting aperture L7. The transverse plane E9 at the front end of the lens holder L6 and the light-emitting aperture L7 finally forms the [unclear text]. Fig. 1 right front end of the lamp according to the invention.

[0065] The luminaire according to the invention is particularly suitable for continuous, frequent, or prolonged use in potentially explosive dust and gas atmospheres, especially in accordance with the requirements of ATEX certification. This can be achieved in particular by selecting appropriate materials for the seals and support rings, as exemplified by the... Fig. 1 e.g. the seals G13 and L521.

[0066] This suitability is achieved according to the invention in particular by the fact that - as in the example of the Fig. As already shown in Figure 1, the lens L5 with the lens body L50, made of a light-conducting material, forms a closed light-emitting surface L53 for emission from the luminaire into the surroundings. The lens can be easily sealed in a luminaire head L, in particular by means of a support ring, also made of light-conducting material, located homogeneously on the lens body. This offers the further advantage that all light from inside the luminaire can be coupled into the lens body L50 from behind via the encapsulated illumination area L4 and at least one light-entry surface L51. The lens thus forms a barrier against the ingress of unwanted substances into the luminaire. This is particularly advantageous when primary and secondary light F8, F9 from main and secondary light sources are coupled into the lens body L50 from behind via the at least one light-entry surface L51.

[0067] If the secondary light also has signaling properties, it can serve particularly advantageously, for example, as a battery status indicator. The resulting light patterns do not interfere in any way with the light pattern produced by the primary light source, since both types of light are coupled out through the single light-emitting surface L53 of the lens. Primary and secondary light can be superimposed without affecting the visibility to an operator, or alternatively, for example, activated in an alternating pattern.

[0068] The luminaire according to the invention, due to its lens with a closed lens body as a compact glass body, offers the advantage that no further components are required to guide the light rays from the light source. In particular, no reflectors with additional openings as required by the prior art are necessary. The luminaire thus emits a uniform, homogeneous light pattern in every operating mode, without any inhomogeneities, also known as sunspots. No external housing openings or internal openings in individual components are required for the additional emission of secondary light, which has signaling properties in particular. Rather, the emission of secondary light occurs in the same way as primary light through the front light exit aperture of the central lens. This makes it particularly easy to comply with explosion protection regulations.

[0069] In a particularly advantageous embodiment of the portable lamp according to the invention, the encapsulated carrying sleeve, which contains the electronic components of the lamp that serve to control the light sources and are supplied by the storage for electrical energy, forms a compact unit with the light sources that is removable and replaceable.

[0070] Such a design is exemplified in the Fig.As already shown in Figure 1, the encapsulated support sleeve L2, as a compact unit, can be easily ejected to the left from the now open access chamber L1 by simply sliding it out after the light head L has been unscrewed from the handle G. This removes all electronic components in the support sleeve, including the light source located on the sleeve, a defect in which could be a possible cause of a potential light failure. These can be replaced with an identical, new encapsulated support sleeve.

[0071] Such a unit can then be easily inserted from the left through the access chamber L1 into the light head L until the stop sleeve L27 of the new encapsulated support sleeve L2 rests against the annular contact surface, which runs inside the housing of the light head L between the transverse planes E4 and E5. The optically optimal position of the compact assembly, consisting of the encapsulated support sleeve L2 with the light sources L3 aligned towards the light entrance surface L51 of the lens body L50, is thus restored inside the light head along the axis of symmetry S1, without the need for any optical readjustment. In this way, all optical distances to the existing lens L5 in the illumination area L4, as well as the light patterns produced by the light sources, are precisely restored.

[0072] This embodiment of the luminaire according to the invention offers the particular advantage that the user cannot modify the internal live components, which are particularly important for ensuring explosion protection, as they are shielded inside the encapsulated mounting sleeve. If a defect occurs, especially of an electronic component in the mounting sleeve or of a light source at the front end of the mounting sleeve in the light emission plane, the user can remove the mounting sleeve from the luminaire head after detaching the luminaire head from the handle and replace it entirely. No action by third parties, especially the luminaire manufacturer, is required for this. After reassembling the handle and luminaire head with the replaced mounting sleeve, the luminaire again meets the explosion protection regulations.This can be reused by the user without requiring any recertification of the light fixture. Reference symbol list S1 axis of symmetry S2 fault line G handle G1 coat G11 shaft for housing an electrical energy storage system G12 insert recess for a seal G13 seal, in particular a silicone O-ring G14 thread at the contact area G15 Grip and clamping area G2 floor G21 contact area for battery negative terminal G22 spring contact between contact area and battery negative terminal G3 head area, especially an open contact area G31 Insertion opening into shaft G11 G32 ring-shaped contact surface between handle and support sleeve B Storage for electrical energy B1 Battery body B2 battery head with positive terminal B3 Battery base with negative terminal L light head E1 to E9 transverse planes through the light head E1 Transverse plane at the intervention space L1 of the light head L E2 Transverse plane between engagement space L1 and underside of the support sleeve E3 Light emission plane E4 Transverse plane on the support ring of the stop sleeve L27 E5 Transverse plane on the underside of the lens support ring E6 Transverse plane on the top of the lens support ring E7 Transverse plane at the light exit surface L53 of the lens E8 Transverse plane at the top of the light head E9 Transverse plane at the light emission opening of the luminaire L1 Intervention space for the head area of ​​the handle L2 encapsulated support sleeve L20 rear end of the support sleeve L21 first casting chamber L22 second potting chamber LM potting compounds L23 first circuit board L231 Underside with contacts, e.g. to battery positive terminal L232 first electronic components L233 Power and control signal transmission line L24 second circuit board L241 second electronic components L242 Power and control signal transmission line L25 third circuit board L251 third electronic components L26 Light emission plane of the support sleeve L27 Stop sleeve of the support sleeve L3 light source L31 Main light source for a primary light F8 L32, L33 Secondary light source for a secondary light F9 L4 encapsulated irradiation area L4a outer illumination space, especially for secondary light L4b inner illumination space especially for primary light L5 lens L50 lens body L51 Light entry surface on the lateral surface of the lens body L511 outer light entry surface L514 pot-shaped depression of the lens body L513 first inner light entry surface L512 second inner light entry surface L53 Light emission surface (coupling surface) L52 support ring L521 Seal L6 lens holder L7 Light exit aperture F8 Primary light of the main light source L31 F81 Projection of an exemplary light cone onto primary light F82 to F85 projections of symbolic inner light cones F9 Secondary light of the secondary lamps L32, L33 F91 exemplary crescent-shaped photograph of L32 F91a, F91b symbolic paths of limiting arcs F92 exemplary crescent-shaped photograph of L33 F92a, F92b symbolic paths of limiting arcs of light 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] CN 118896265 A

[0006]

Claims

[1] Portable light for use in potentially explosive atmospheres, with a) at least one storage device (B) for electrical energy, b) Light sources (L3) for generating light (F8, F9) using the electrical energy of the storage device (B), c) a lens (L5) with a lens body (L50) made of a light-guiding material, wherein the lens body (L50) has at least one light-entry surface (L51; L511, L512, L513) and one light-emission surface (L53) for emission from the luminaire for the light (F8, F9), and d) an encapsulated carrying sleeve (L2) containing electronic components (L232, L241, L251) for controlling the light sources (L3) and powered by the electrical energy storage device (B), wherein e) the light sources (L3) are arranged on the encapsulated support sleeve (L2) in the direction of a light entry surface (L51; L511, L512, L513) of the lens body (L50), and f) the encapsulated carrying sleeve (L2) with the light sources (L3) forms a compact unit that is removable and replaceable. [2] Luminaire according to claim 1, which is designed in such a way that it enables continuous, frequent or prolonged use in potentially explosive dust and gas atmospheres in accordance with the requirements of ATEX certification. [3] Luminaire according to claim 1 or 2, wherein the encapsulated carrying sleeve (L2) with the light sources (L3) is designed in such a way that it enables continuous, frequent or prolonged use of the luminaire in potentially explosive dust and gas atmospheres in accordance with the requirements of the ATEX certification. [4] Luminaire according to one of the preceding claims, wherein the encapsulated carrying sleeve (L2) is filled with a mass which has at least electrically insulating properties. [5] Luminaire according to one of the preceding claims, wherein the encapsulated carrying sleeve (L2) is filled with a mass which has at least thermally conductive properties. [6] Luminaire according to one of the preceding claims, with an encapsulated irradiation area (L4) between the light sources (L3) and the lens (L5), whereby the light sources (L3) couple light (F8, F9) into the at least one light entry surface (L51; L511, L512, L513) of the lens body (L50). [7] Luminaire according to one of the preceding claims, with a) a handle (G) with a shaft (G11) for receiving at least one storage device for electrical energy (B), and b) a light head (L) which is electrically coupled to the handle (G) in a gas- and dust-tight manner and which contains at least the light source (L3) for generating a light (F8, F9), the lens (L5) with the lens body (L50) and the encapsulated carrying sleeve (L2). [8] Luminaire according to claim 7, wherein the handle (G), the lamp head (L) and the connection (G13, G14) of the handle (G) and the lamp head (L) are designed such that the luminaire enables continuous, frequent or prolonged use of the luminaire in potentially explosive dust and gas atmospheres in accordance with the requirements of the ATEX certification. [9] Luminaire according to any of the preceding claims, wherein the light sources (L3) produce a primary light (F8) and at least one secondary light (F9) as light (F8, F9). [10] Luminaire according to claim 9, wherein the light sources (L3) comprise a) a main light source (L31) for generating the primary light (F8), in particular a white light-emitting diode, and b) at least one secondary light source (L32, L33) for generating at least one secondary light (F9), in particular at least one red light-emitting diode. [11] Luminaire according to claim 9 or 10, wherein the electronic components (L232, L241, L251) monitor the energy content in the electrical energy storage (B) and activate a secondary light (F9) in the light sources (L3) when the monitoring detects a fall below a minimum value of the energy content in the storage (B). [12] Luminaire according to claim 9, 10 or 11, wherein the electronic components (L232, L241, L251) control the light sources (L3) in such a way that a secondary light (F9) has signaling properties, in particular is switched on and off intermittently. [13] Luminaire according to one of claims 9 to 12, wherein the electronic components (L232, L241, L251) control the light sources (L3) in such a way that the generation of a primary light (F8) is switched off for the duration of the activation of a secondary light (F9). [14] Luminaire according to any one of claims 9 to 13, wherein the lens body (L50) comprises a) at least one inner light entry surface (L512, L513) with a reflector surface rotationally symmetric to the axis of symmetry (S1) of the lens body (L50), via which the light sources (L3; L31) couple primary light (F8) into the lens body (L50), and b) an outer light entry surface (L511) around the at least one inner light entry surface (L512, L513), via which the light sources (L3; L32, L33) couple the at least one secondary light (F9) into the lens body (L50). [15] Luminaire according to claim 14, wherein the lens body (L50) is designed as a collimator lens. [16] Luminaire according to claim 15, wherein a) the outer light entry surface (L511) has a reflector surface rotationally symmetric with total internal reflection (TIR) ​​about an axis of symmetry (S1) of the lens body (L50), and b) the inner light entry surface (L511) has a first inner light entry surface (L513) which has at least one lens-shaped, aspherical light entry surface at the base of a pot-shaped depression (L514) arranged rotationally symmetric to the axis of symmetry (S1) in the lens body (L50). [17] Luminaire according to claim 16, wherein the cup-shaped recess (L514) is conically narrowed in the direction of the light exit surface (L53) of the lens body (L50) and its wall has a second inner light entry surface (L512) with a reflector surface rotationally symmetric to the axis of symmetry (S1) with total internal reflection (TIR).

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