| 摘要 |
The door latch blocking anti-theft device consists of a metal box of 70 mm. by 80 mm., 20 mm. deep with lid, making up a semi-airtight system and lubricated with industrial grease. It consist of an axis (7) with wheel (6) which moves activated by the door (3) which in turn works the axis (9) with its wheel (10). This in turn allows metal plate (11) to move up and down worked by springs (8) and (12). This automatic system can be voluntarily blocked manually by pressing a button with its axis (13) installed in the lid with its operating spring (15). This axis is blocked by the part (5) in the groove of the axis. Upon shutting the door, the wheel (10) triggers the part (5) making the button jump outwards. When permanently fixed, the metal plate acts as an antitheft device. <IMAGE>
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