Casing assembly for burglar alarms
First Claim
1. An improved casing assembly for burglar alarms, comprising:
- an upper casing, having at least one latch pillar individually disposed on both sides of said upper casing, a latch set for retaining a circuit board and a hollow cavity, and said hollow cavity having a surrounding plate disposed around said hollow cavity for mounting a speaker, and said surrounding plate having two interconnected hollow pillars with unequal diameters disposed on both sides of said surrounding plate;
a chassis, having a surrounding plate for enclosing an area corresponding to said upper casing, a slot formed between said surrounding plate and said chassis, a latch hole corresponding to said latch pillar, a through hole individually disposed at said hollow pillar having a larger diameter and a key hole disposed on said surrounding plate; and
a front panel, being covered onto the exterior of said upper casing and installed onto said chassis, and having a latch plate disposed on an internal edge of said front panel corresponding to said latch hole of said chassis, and a key hole disposed on another side corresponding to said key hole of said chassis, and an embedded plate extended from a bottom edge around the periphery of said front panel corresponding to said slot;
thereby the foregoing element constituting a casing for a burglar alarm without using screws for the fixture and being tightly assembled to prevent said casing assembly from being opened by an external force.
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Accused Products
Abstract
The present invention discloses an improved casing assembly for burglar alarm, and the casing comprises an upper casing, a chassis and a front panel; wherein a circuit board and a speaker are included in the upper casing and the chassis and the front panel is covered on the exterior of the upper casing and locked with the chassis by a lock as a whole. The assembly of the forgoing components is connected by the corresponding coupling components on the assembly and thus does not require additional coupling device, which makes the assembly much simpler and quicker and has the advantages of lowering the manufacturing and labor costs. In the meantime, the printed circuit according to the present invention is coupled to a vibration switch or magnetic spring switch as a sensor triggering source for acting as a trigger of the burglar alarm for motor vehicles, portable objects, displayed items, doors and windows, security or display windows. All these burglar alarms can share the same casing and thus can save the cost for manufacturing the molds. The casing can go with a rope having a metal head for passing through, suspending at or fixing onto a wall to give an excellent antitheft protection effect.
14 Citations
10 Claims
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1. An improved casing assembly for burglar alarms, comprising:
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an upper casing, having at least one latch pillar individually disposed on both sides of said upper casing, a latch set for retaining a circuit board and a hollow cavity, and said hollow cavity having a surrounding plate disposed around said hollow cavity for mounting a speaker, and said surrounding plate having two interconnected hollow pillars with unequal diameters disposed on both sides of said surrounding plate;
a chassis, having a surrounding plate for enclosing an area corresponding to said upper casing, a slot formed between said surrounding plate and said chassis, a latch hole corresponding to said latch pillar, a through hole individually disposed at said hollow pillar having a larger diameter and a key hole disposed on said surrounding plate; and
a front panel, being covered onto the exterior of said upper casing and installed onto said chassis, and having a latch plate disposed on an internal edge of said front panel corresponding to said latch hole of said chassis, and a key hole disposed on another side corresponding to said key hole of said chassis, and an embedded plate extended from a bottom edge around the periphery of said front panel corresponding to said slot;
thereby the foregoing element constituting a casing for a burglar alarm without using screws for the fixture and being tightly assembled to prevent said casing assembly from being opened by an external force. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification