Simple alarm device
An alarm device and alarm technology, which is applied in the direction of an alarm that is activated by an open alarm, an anti-theft alarm machine, an alarm that is broken/disturbed and straightened by a rope/metal wire, etc., and can solve narrow gaps between doors, false alarms, etc. problem, to achieve the effect of cheap price and simple structure
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Embodiment 1
[0027] The anti-theft alarm device of the present invention is composed of a housing 1, and the housing 1 accommodates: a reel 3 that winds the rope 2, a coil spring 4 that provides a winding force to the reel 3, and a coil spring 4 that is arranged around the reel 3 and passes through the rope. 2 is pulled out or pulled in by the coil spring 4 to make the reel 3 rotate, and the switch of the switch 5 is turned on the protruding mechanism 8, and the switch is connected by pulling out the rope 2 or pulled in by the coil spring. The alarm action switch 5 that is turned on when the switch 5 is pulled by the protrusion mechanism 8, the alarm sound generating device 16 that is operated by the switch 5, and the battery 6 that provides power to the alarm sound generating devices such as the alarm buzzer 16; The free end of the rope 2 has a fixing mechanism 7 which can be fixed on the window frame.
[0028] Since the rope 2 is colored in a conspicuous color such as red or yellow from ...
Embodiment 2
[0034] image 3 Shows examples of installation on various security objects, a shows the situation where the security alarm device is installed between bicycles and buildings such as fences, and b shows that the security alarm device is installed between a picture and a wall. The situation of the alarm device, c shows the situation that the anti-crime alarm device is set between the curtain or the door and the wall, d shows the situation that the anti-crime alarm device is set between the shutter and the window frame, e shows The case where the security alarm device is installed between the laundry and the pillars, etc. The anti-crime alarm device of the present invention is a very simple anti-crime alarm device with low price. It can be widely used on anti-crime objects such as pictures, bags, laundry, bicycles, etc., and can also be very easily installed on anti-crime objects. .
Embodiment 3
[0036] Figure 4 A state in which the casing 1 of the alarm device of the present invention is mounted on the mounting plate 18 is shown. The alarm device of the present invention is provided with an engaging slot 21 at the center of the back side of its housing 1, and the engaging slot 21 is engaged with the opening pin 19 arranged at the center of the mounting plate 18, thereby the device housing 1 is installed on the mounting plate 18, therefore, the device casing 1 can freely rotate around the pin shaft 19. In this way, because the device housing 1 is free to rotate around the pin shaft 19, the pull cord 2 for the reel action can be rotated corresponding to the pulling position of the person, and can be pulled out from the alarm device housing 1 in the vertical direction from time to time. . The mounting plate 18 is equipped with a double-sided adhesive tape 20 on its bottom surface, which can be installed at the position where it is desired to arrange the alarm device. ...
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