Portable lighting device
AssigneeCooper Crouse-Hinds GmbH
InventorFriedhelm Harnischmacher
Life of this patent
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Abstract
A portable lighting device has at least one LED light source (2). Associated with this light source are a voltage supply (3) which can be switched on and off and a light distribution device (4) for varying a luminous intensity distribution of the light source (2). In order to improve the light distribution device in the case of such a portable lighting device in a simple way in design terms and without a considerable amount of space being required, it has a lens system (5) which can be varied in its distance in relation to the light source (2).
Claims19
A portable lighting device (1) comprising at least one LED light source (2), a voltage supply (3) which is assigned thereto and can be switched on and off, and a light distribution device (4) for varying a luminous intensity distribution of the light source (2),
- characterized in
- that the light distribution device (4) comprises a lens system (5) which is variable in its distance in relation to the light source (2).
The portable lighting device according to any one of the preceding claims,
- characterized in
- that the lens system (5) in axial lighting device direction (8) is supported to be adjustable in relation to a lighting device housing (9).
The portable lighting device according to any one of the preceding claims,
- characterized in
- that the light source (2) is adjustably supported for on and off switching in axial lighting device direction (8).
The portable lighting device according to any one of the preceding claims,
- characterized in
- that the light source (2) is fixed in its axial position after having been switched on.
The portable lighting device according to any one of the preceding claims,
- characterized in
- that in the switched-on state of the light source (2) a cooling device (10) assigned thereto is activated.
The portable lighting device according to any one of the preceding claims,
- characterized in
- that the cooling device (10) is connected in the activated state to the voltage supply (3).
The portable lighting device according to any one of the preceding claims,
- characterized in
- that the lens system (5) is held in a rotatable lighting device head (11), a distance (12) between lens system (5) and light source (2) being variable by rotating the lighting device head (11).
The portable lighting device according to any one of the preceding claims,
- characterized in
- that a protection disk (13) is arranged on the outside (14) of the lens system (5) oriented away from the light source (2), particularly in the lighting device head (11).
The portable lighting device according to any one of the preceding claims,
- characterized in
- that the lighting device (1) is made explosion-proof.
The portable lighting device according to any one of the preceding claims,
- characterized in
- that the light source (2) has a luminous intensity distribution with spotlight or wide-beam characteristic.
The portable lighting device according to any one of the preceding claims,
- characterized in
- that the cooling device (10) is assigned to the light source (2) on its backside oriented away from the lens system (5).
The portable lighting device according to any one of the preceding claims,
- characterized in
- that the lighting head (11) comprises a screwed-on screwing ring (16).
The portable lighting device according to any one of the preceding claims,
- characterized in
- that the lighting device (1) is adapted to be switched off automatically.
The portable lighting device according to any one of the preceding claims,
- characterized in
- that the lens disk (6) comprises at least one ring (17, 18) surrounding the lens (7) and projecting in the direction of light source (2).
The portable lighting device according to any one of the preceding claims
- characterized in
- that the light source (2) has assigned thereto a contact ring (19) which upon electrical contact with the light source (2) switches it on.
The portable lighting device according to any one of the preceding claims,
- characterized in
- that the light source (2) is arranged on the optical axis (20) of the lens (7).
The portable lighting device according to any one of the preceding claims,
- characterized in
- that a ring (17) is standing with its free end (21) on a free sleeve end (22) of the lighting head (11).
The portable lighting device according to any one of the preceding claims,
- characterized in
- that surrounding sealing elements (23, 24) are arranged between lighting head (11) and lighting housing (9) and/or screwing ring (16) and lighting device head (11).
Dependencies are inferred from the claim text.