| 摘要 |
<p>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.</p> |
