Abstract:
A burglar alarm apparatus to be fitted to an object of protection for detecting a preliminary action of theft by raising an alarm, etc., and also relates to a radio receiver for the apparatus. There have been the problems in the past that the engagement of the apparatus with the object article becomes unstable due to external vibration, etc., or the engagement mechanism is easily tampered with. The apparatus of the invention comprises an electrical holding circuit wherein holding means (VK) for holding alarm output means (AO) for outputting alarm information on the basis of the detection information of preliminary action detection means (SD) for detecting a preliminary action of theft is set to a hold state on the basis of an actuation instruction, and alarm release means (R) comprises a hold release instruction switch for instructing the electrical holding circuit (VK) to release hold by an electrical signal. Accordingly, the apparatus can be made compact as a whole, and the holding means for holding the alarm output means in the operative state can exhibit a stable holding function.
Abstract:
A burglar alarm apparatus to be fitted to an object of protection for detecting a preliminary action of theft by raising an alarm, etc., and also relates to a radio receiver for the apparatus. There have been the problems in the past that the engagement of the apparatus with the object article becomes unstable due to external vibration, etc., or the engagement mechanism is easily tampered with. The apparatus of the invention comprises an electrical holding circuit wherein holding means (VK) for holding alarm output means (AO) for outputting alarm information on the basis of the detection information of preliminary action detection means (SD) for detecting a preliminary action of theft is set to a hold state on the basis of an actuation instruction, and alarm release means (R) comprises a hold release instruction switch for instructing the electrical holding circuit (VK) to release hold by an electrical signal. Accordingly, the apparatus can be made compact as a whole, and the holding means for holding the alarm output means in the operative state can exhibit a stable holding function.
Abstract:
PURPOSE:To avoid the erroneous operation by rationally changing a release operation tool based on the use condition of this tool. CONSTITUTION:A release operation tool K like a bar which is freely inserted to an insertion hole 45 for release operation formed in an enclosure 2 provided with a preparatory action detecting means SD, which detects a preparatory action of theft, and operates an unlock means 5 of a pair of lock means 41 and 42 to the first release state and the second release state in accordance with insertion into the enclosure is provided with a contact part (s) to the outer face of the enclosure 2, an insertion part 63 which projects from the contact part (s) and is inserted to the insertion hole 45 for release operation, and a projection extent control part W which changes and controls the extent of projection from the contact part (s) of the insertion part 63.