BURGLAR ALARM APPARATUS AND RADIO RECEIVER

摘要

A burglar alarm apparatus to be fitted to an object of protection and 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 alarm becomes out of operation when strong mechanical shocks are applied to the apparatus. In the present invention, a circuit substrate (6) of alarm output means (AO) disposed inside a casing (2) fitted to an object of protection is held by the first (2a) of a pair of wall portions (2a, 2c) of the casing (2) opposing each other, and a first kind constituent member (FE) of the alarm output means (AO) is held by the second wall portion (2c); an electric contact member (CE) provided on the first kind of constituent member (FE) is constructed in such a manner as to come into contact with a first kind contact (FC) having a contact face facing the second wall portion side of the circuit substrate (6); and the electric contact member (CE) comprises a coil spring capable of extending toward the pair of wall portions (2a, 2c) and disposed under the state where it is contracted from its maximum extension state. Accordingly, electrical connection can be maintained against a strong impact.