Self-locking lockpin

Abstract

The invention discloses a self-locking lockpin used for locking a plastic-steel sliding window. A lockpin stick is composed of a double-strand steel wire 5; the rear ends of the double-strand steel wire 5 are symmetrically provided with sawtooth-shaped pin teeth 4 which are arranged at the rear part in a right angle; the rear ends of the double-strand steel wire 5 are respectively provided with a closed ring shape; a handle 3 higher than a ring-shaped plane is folded on each ring shape; when the two handles 3 are pinched, the elastic force of the double-strand steel wire 5 is contracted; the V-shaped double-strand steel wire 5 is overlapped with the sawtooth-shaped pin teeth; the lockpin stick with the reduced diameter just goes through a lockpin hole 7 in a lockpin plate 1, and can smoothly go into the lockpin hole 7 and go out of the lockpin hole 7; when the lockpin is in a free state, the lockpin plate 1, the edge of a plastics-steel door and window jack and the edge of a metallic framework hole simultaneously lock the window as the popped pin teeth 4 in multiple layers are reversely hooked, so that the safety effect of the self-locking lockpin can be guaranteed absolutely.

Description

technical field [0001] The invention belongs to a lock pin device for a lock pin plastic-steel sliding door and window, in particular to a self-locking lock pin in an insertion mode. Background technique [0002] At present, the plastic-steel sliding doors and windows are all clear lock pins set on the surface position, and this lock pin catches the hook provided on the other window by rotating the lock handle so that the two doors and windows can not be relatively pulled. There is also a common feature of such a lock pin device installed on the outside that the structure is relatively complex, and it cannot be designed too thick and too large due to the restriction of the appearance requirements. Therefore, the structure located on the outside determines that the safety of this thin lock pin device is too high. Bad, thieves can crack it without much effort. The method used by folks to drill through holes in two windows is to use nails to insert lock pins. Although the lock...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this structure can only be installed next to the slideway near the plastic-steel doors and windows, and cannot be installed on other positions of the doors and windows. An additional locking device with a larger quality will increase the cost relatively. It is not good-looking. If you want to choose stainless steel as a material, it will greatly increase the cost and price. The second most critical issue is that there is still the possibility of being cracked by slight rotation.

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