Work light with removable diffuser

Abstract

The disclosure relates to a work lamp comprising a semiconductor light source. A converging lens is arranged in front of the semiconductor light source. A removable diffuser configured as a hollow body is also arranged in front of the converging lens.

Description

Field of the InventionThe invention relates to a working light with a removable diffuser.BACKGROUND OF THE INVENTIONWork lights, also referred to as construction site headlights, are known from practice. In particular, there are work lamps with a removable diffuser. The working lamp can thus be used both as a headlight and for extensive illumination of a room. When the diffuser is placed on, the light emitted by the light source is scattered and thus also distributed to the side in the space.Document EP 2 261 549 A1 shows a light scattering attachment for a portable lamp. The document DE 10 2011 108 709 A1 shows a work light with a foldable hook. The document US 2019 / 0285256 A1 shows a work light which is pivotably arranged on a foot module.Object of the InventionThe invention is based on the object of further improving the functionality of a work lamp equipped with a diffuser.SUMMARY OF THE INVENTIONThe object of the invention is achieved by a work light according to one of the independent claims.Preferred embodiments and developments of the invention can be taken from the subject matter of the dependent claims, the description and the drawings.According to a first aspect, the invention relates to a work light.The work lamp includes a semiconductor light source. The semiconductor light source can be designed in particular as an LED array. In this case, a printed circuit board, in particular a planar printed circuit board, is preferably equipped with a multiplicity of LEDs.The working lamp according to the invention can be designed both as a rechargeable battery lamp and as a mains-connected lamp.According to the invention, a converging lens is arranged in front of the semiconductor light source with respect to the beam path, wherein a removable diffuser designed as a hollow body is arranged in front of the converging lens.By means of the combination of converging lens and removable diffuser, an improved dual functionality can be provided in that the working light can be used on the one hand as a spotlight with a centered light cone and as a diffuser light with a lampshade for room lighting.The diffuser is preferably designed as a hollow body made of plastic. The material of the diffuser comprises light-scattering impurities, from which the light is emitted in all directions. The impurities can be, in particular, pigmentation, in particular white particles. Diffuse emission of the light can also be achieved via a structured, in particular rough, surface.Preferably, the diffuser can be attached to a housing of the work light by means of a bayonet lock.In particular, the diffuser can be inserted into a receptacle of the work lamp and locked on the housing by a rotation of less than 90°, preferably less than 45°.In a development of the invention, a conical, in particular frustoconical, reflector is arranged around the semiconductor light source. The focusing of the light is further improved via the reflector, in particular in its function as a headlight without a diffuser attached.According to the invention, the working lamp comprises a housing pivotably attached to a U-shaped support. The housing can be pivoted in particular by at least 90° perpendicular to a central axis of the diffuser and / or of the reflector.Thus, the work lamp can be suspended in an upside-down position, in which position the diffuser is directed downwards.The carrier is arranged on a foot module, by means of which the working light can be placed on the ground.The foot module can in particular comprise two longitudinal members with feet which are connected via at least one cross member.In a further development of the invention, the carrier is rotatable on the foot module about an axis running perpendicular to the pivot axis. Thus, in the erected state on the ground, not only the angle upwards and downwards, but also the emission direction to the right and to the left can be changed. In the erected state, the axis of rotation is thus oriented vertically.According to a further aspect, the invention relates to a work light. This can comprise in particular one or more features described above.The work light comprises a semiconductor light source, wherein a removable diffuser designed as a hollow body is arranged in a first receptacle in front of the semiconductor light source.According to the invention, the working lamp comprises a second receptacle for the diffuser.The diffuser can thereby be removed in front of the semiconductor light source and inserted into the second receptacle. The second receptacle thus serves only for holding the diffuser if it is not intended to be used.The diffuser is then non-detachably connected to the working lamp, in particular via a bayonet connection. In the second receptacle, there is no light source behind the diffuser.According to one embodiment of the invention, the second receptacle is arranged on a holder which is arranged separately from a housing of the work light on the rails of a foot module.By coupling to the rail module, preferably on the rear side of the work light, the position of the housing can be changed without impairing the position of the diffuser.According to a further aspect, the invention relates to a work light which can have, in particular, one or more features described above.The work light comprises a semiconductor light source, wherein a removable diffuser designed as a hollow body is arranged in front of the semiconductor light source.Furthermore, the working lamp comprises a housing which is pivotable on a carrier about an axis running perpendicular to the central axis of the diffuser.According to the invention, the carrier is arranged on a foot module, wherein a hook for hanging the work light is arranged on the foot module.The work light can thus be adjusted in a particularly simple manner with respect to a position set up on the ground in such a way that the diffuser points upward.Due to the hook on the underside of the foot module, according to the invention the work light can then be suspended in an upside-down position, for example on the ceiling, and thus serve as room lighting.The hook can be arranged in particular on a second receptacle for the diffuser.Preferably, the hook is inserted into a recess of the receptacle and can be pivoted out.Brief Description of the DrawingsThe subject matter of the invention is to be explained in more detail below with reference to an exemplary embodiment with reference to the drawings FIGS. 1 to 7. FIGS. 1 to 3 are perspective views of an embodiment of a work light according to the invention. FIG. 4 is a perspective view of the work lamp with the diffuser removed. FIG. 5 is an illustration of the semiconductor light source together with the lens and the attachment means for the lens. FIG. 6 is an exploded view of the work lamp. FIG. 7 is a perspective view of the work lamp, with the diffuser now inserted into the second receptacle.Detailed Description of the DrawingsFIG. 1 shows a perspective view of an exemplary embodiment of a work light 1 according to the invention.The work light 1 comprises a housing 10 which comprises a receptacle 11 into which a diffuser 40 is removably inserted, in particular by means of a bayonet lock.The diffuser 40 is designed as a hollow body. In this exemplary embodiment, the cross section of the diffuser 40 narrows in the direction of the housing 10.The cross section of the diffuser 40 changes from a round to a non-round, in particular square, cross section starting from the receptacle 11.The diffuser 40 can assume a volume of 500 to 3000 cm 3, in particular of 1000 to 2000 cm 3. The diffuser 40 can be between 3 and 20 cm long, in particular between 5 and 15 cm long.This facilitates the insertion of the diffuser 40 in the bayonet closure, since due to the angular configuration the diffuser 40 can be obliquely inserted into the bayonet and locked by rotation in the position shown here defined by the edges.In this illustration, the working light 1 is oriented for placement on the ground.In this case, a front side of the work lamp 1 is defined by the diffuser 40 oriented toward the side.The housing 10 is provided with a handle 12 which, in the position shown here, projects upwards out of the housing 10 with the diffuser 40 aligned laterally.The work light 1 comprises a foot module 30 with, in this exemplary embodiment, four feet 33, over which the work light 1 can be placed.The foot module 30 comprises two longitudinal struts 32 a, 32 b, which are connected to one another via a transverse strut 31.The feet 33 are designed as caps, preferably made of plastic, which are plugged onto the longitudinal struts 32 a, 32 b.Attached to the cross strut 31 of the foot module 30 is a U-shaped or bow-shaped carrier 20 to which the housing 10 is pivotably attached.The pivot axis 2 extends perpendicular to a central axis of the diffuser 40.In this embodiment, the pivot axis 2 is disposed above a central axis of the housing 10 in the transverse direction.After loosening an actuating element, in particular a knurled screw or knurled nut, the housing 10 with the diffuser 40 can be pivoted into a position in which the diffuser 40 is oriented upward.The work lamp 1 can then be suspended in an upside-down position for room lighting.Furthermore, the carrier 20 is rotatable on the vertically oriented axis of rotation 3 relative to the foot module 30. Thus, the housing 10 with the diffuser 40 can be rotated to the right and to the left. This is also done by loosening an actuating member, in particular a knurled screw or knurled nut.FIG. 2 is a rear perspective view of the work lamp 10.The housing 10 is provided with cooling ribs on the rear side.This exemplary embodiment is a mains-connected working lamp 1, which can be connected to a modular socket via the connecting cable 14.On the rear side of the housing there is a socket 13, to which consumers, in particular tools, can be connected. By means of the switch 15, which in this embodiment is located on the rear side of the housing 10, the working lamp 1 can be switched on and off. According to one embodiment, it is provided that the switch 15 has at least two switching positions for different brightnesses.On the rear side, separately from the housing 10, there is arranged a holder 50 for the diffuser, which can be used if the diffuser 40 is not intended to be used as a room light.The holder 50 comprises a second receptacle 51 for the diffuser 40, which receptacle is designed as a bayonet and a marking 56 facilitates the insertion of the diffuser 40, which is then locked by a rotational movement.The receptacle 50 comprises two laterally projecting arms 52, with which the holder 50 is pushed onto the longitudinal struts 32 a, 32 b.FIG. 3 is a perspective view of the work lamp 1 as viewed from the lower side thereof.On the underside of the holder 50, inserted into a recess 54, is seated a hook 53.The hook 53 is pivotably mounted in a bearing 55 and can be pivoted out of the position shown here.In order to be able to swivel out the hook 53, the user can grip into the grip lock 57 and lever out the hook 53.The work lamp 1 can then be suspended in an upside-down position. The diffuser 40 is pivoted together with the housing 10 by 90° relative to the position shown here, so that the diffuser 40 points downward in the upside-down position.FIG. 4 is a perspective view of the work lamp 1, with the diffuser now removed.In front of the light source, which is arranged in the housing 10, there is a converging lens 60, which in this exemplary embodiment is secured by means of a ring 11 attached to the housing 10.As shown here, the working lamp 1 can thus be used as a spot headlight, wherein the light emitted by the light source is focused by the converging lens 60.The marking 19 facilitates the insertion of the diffuser in the correct sink into the bayonet of the receptacle 11.FIG. 5 is a perspective view of the components for generating light from the work lamp arranged in its housing.A semiconductor light source 4 serves as the light source, which in this exemplary embodiment is formed as an LED array with a plurality of LEDs on a printed circuit board.The semiconductor light source 4 is formed in a circular shape in this exemplary embodiment.A truncated cone-shaped reflector 16 extends around the semiconductor light source 4 and further focuses the light.The reflector 16 may be part of a plate inserted into the housing.The reflector 16 can be, in particular, a deep-drawn component made of metal or a plastic component provided with a reflective coating.The converging lens 16 is secured on the reflector 16 by means of a ring 11 which comprises the receptacle of the bayonet for the diffuser.Preferably, the converging lens 60 is formed convex only on the front side. The rear side is preferably planar, which enables a more compact construction.In order to be secured by means of the ring 11, the converging lens 60 comprises a lateral collar 61 which, in the assembled state, serves as a positive-locking element in cooperation with the ring 11.FIG. 6 is an exploded view of the work lamp 1.The housing comprises an upper housing part 17 and a lower housing part 18 which is provided with cooling ribs.Inserted into the housing is in particular the component with the reflector 16.The converging lens 60 is secured to the upper part 17 by means of the receptacle 11.On the rear side, the diffuser 40 comprises a bayonet 41 for insertion into the receptacle 11.FIG. 7 is an illustration of the work lamp 1, wherein now the diffuser 40 is inserted into the rear-side receptacle 51 of the holder 50.The diffuser 40 is located at least in sections between the longitudinal struts 32 a, 32 band is thus protected against damage.The working lamp 1 can thus be used as a spot radiator, wherein the diffuser 40 is simultaneously connected in an captive manner to the rest of the lamp.The invention has made it possible to provide a work light with improved functionality.List of reference characters1 Work lamp 2 Pivot axis 3 Axis of rotation 4 Semiconductor light source 10 Housing 11 First receptacle 12 Handle 13 Socket 14 Connecting cable 15 Switch 16 Reflector 17 Upper housing part 18 Lower housing part 20 Carrier 30 Foot module 31 Cross strut 32 a, 32 b Längs strut 33 Foot 40 Diffuser 41 Bayonet 50 Holder 51 Second receptacle 52 Arm 53 Hook 54 Recess 55 Bearing 56 Marking 57 Handle hole 60 Converging lens 61 Collar

Claims

Working light (1) comprising a semiconductor light source (4), wherein a converging lens (60) is arranged in front of the semiconductor light source (4), and wherein a removable diffuser (40) designed as a hollow body is arranged in front of the converging lens (60), and wherein the working light (1) comprises a housing which is pivotably attached to a U-shaped carrier (20), wherein the carrier (20) is arranged on a foot module (30).Working lamp (1) according to the preceding claim, characterized in that the diffuser (40) is attached by means of a bayonet closure (41).Working lamp (1) according to one of the preceding claims, characterized in that a conical, in particular frustoconical, reflector (16) is arranged around the semiconductor light source (4).Working lamp (1) according to one of the preceding claims, characterized in that the housing can be pivoted by at least 90° with respect to the carrier (20).Working light (1) according to the preceding claim, characterized in that the support (20) is rotatable on the foot module (30) about an axis running perpendicular to the pivot axis.Working light (1), in particular according to one of the preceding claims, comprising a semiconductor light source (4), wherein a removable diffuser (40), which is designed as a hollow body, is arranged in a first receptacle (11) in front of the semiconductor light source (4), wherein the working light (1) has a second receptacle (51) for the diffuser (40).Working light (1) according to the preceding claim, characterized in that the first receptacle (11) is arranged on a front side and the second receptacle (51) is arranged on a rear side of the working light (1).The work light (1) according to one of the two preceding claims, characterized in that the second receptacle (51) is arranged on a holder (50), which is arranged separately from a housing of the work light (1) on the rails of a foot module (30).Working light (1), in particular according to one of the preceding claims, comprising a semiconductor light source (4), wherein a removable diffuser (40) designed as a hollow body is arranged in front of the semiconductor light source (4), wherein the working light (1) comprises a housing which is pivotable on a carrier (20) about an axis running perpendicular to the central axis of the diffuser (40), wherein the carrier (20) is arranged on a foot module (30), and wherein a hook (53) for hanging the working light (1) is arranged on the foot module (30), with which hook the working light (1) can be suspended in an upside-down position, wherein in this position the diffuser (40) is directed downward.Working light (1) according to the preceding claim, characterized in that the hook (53) is arranged on a second receptacle (51) for the diffuser (40).

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