A security alarm 1 for a vehicle comprises: a housing having: inner and outer casings, the inner casing 5a having interior and exterior surfaces and at least one aperture 23 extending between the surfaces; the outer casing 30 having interior and exterior surfaces so that the interior surface of the exterior casing overlies at least part of the exterior surface of the inner casing with the exterior casing covering the aperture, and where a gap (35, figures 10-12) between the two casings has a dimension between 1mm and 5mm; a base 4 comprising an attachment means to attach the housing to a surface of a vehicle; the casing and the base defining an interior space; and at least one motion sensing component 3 comprising an audio element 17, the motion sensing component being located within the interior space so that each audio element is located adjacent a casing aperture, the motion sensing component being configured to detect movement of the housing and to generate an alarm signal from the audio element in response.
Security alarm
2024-02-21
Patent
Electronic Resource
English
IPC: | B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR |