Theftproof lamp
AssigneePhilips Lighting Holding B.V.
InventorYunfei Xu
Life of this patent
Estimating the term…
Abstract
A theftproof lamp (100), including a lamp body (110) and a lamp cap (120). A spring member (140) and a ratchet wheel mechanism (130) are provided inside the lamp for cooperating with each other and enabling theftproof effect. When turning the lamp clockwise, the lamp can be screwed down to a lamp socket. When turning the lamp counter-clockwise, the lamp can only make repetitive circular motions around the ratchet wheel and therefore achieve the theftproof effect. When a user needs to remove the lamp in a safe way, a bolt (170) can be moved inwardly to block the spring member from moving upward, so that the lamp body, ratchet wheel and lamp cap form a whole, without any movement in relation to each other, and therefore allowing easy removal of the lamp.
Claims6
A lamp comprising:
- a lamp body, including a lighting element and a spring member, wherein the spring member includes a spring and an elongated member, the elongated member terminating with a sloped surface;
- and
- a lamp base including an exterior surface configured to mechanically engage with a lamp socket, the lamp base having a connection end and an insertion end, the connection end being connected to the lamp body such that the lamp base is configured to be axially inseparable from the lamp body but rotatable with respect to the lamp body, the insertion end positioned to be seated further in the lamp socket than the connection end when the lamp base is mechanically engaged with the lamp socket;
- and
- a ratchet wheel, having a plurality of teeth, disposed on the connection end of the lamp base, such that at least a portion of the lamp base is seated further in the lamp socket than the ratchet wheel when the lamp base is mechanically engaged with the lamp socket, wherein the spring biases the elongated member such that the sloped surface of the elongated member mechanically engages with the teeth of the ratchet wheel such that the lamp body is allowed to rotate only in one direction with respect to the lamp base, wherein, when the spring member is constrained from axial movement, the sloped surface is held against the teeth of the ratchet wheel, preventing the lamp body from rotating in any direction with respect to the lamp base.
A lamp comprising:
- a lamp body including a spring member, the spring member being disposed within the lamp body and having an antitheft position and a removal position, the spring member comprising:
- a spring;
- and
- an elongated structure, wherein the elongated structure is engaged with and disposed within the spring;
- and
- a movable bolt;
- and
- a lamp base including a ratchet wheel and an exterior surface configured to mechanically engage with a lamp socket, wherein the spring biases the elongated member such that the elongated member mechanically engages with the teeth of the ratchet wheel,
- wherein, in the antitheft position the movable bolt is positioned so that it will not come into contact with the elongated structure such that the elongated structure is configured to mechanically engage with the ratchet wheel to allow the lamp body and the lamp base to rotate only in one direction with respect to one another,
- wherein, in the removal position, the movable bolt is positioned to constrain the elongated structure from axial movement such that the elongated structure will remain in constant contact with the ratchet wheel, allowing the lamp body and the lamp base to rotate together in both directions.
Dependencies are inferred from the claim text.