Crescent lock for door or window

Abstract

The invention relates to door and window accessories, and particularly relates to a crescent lock for a door or a window. The crescent lock comprises crescent moons, a handle gasket, a handle seat, a leaf spring, a push key and a spacer, wherein the crescent moons are orderly sleeved on a long column of a handle; the hand gasket includes a sleeve; the crescent moons and a handle sleeve rotate together with the long column of the handle; the handle seat is sleeved on the sleeve; two parallel planes are arranged on the long column of the handle; a plurality of strip spring blocks on the handle seat are distributed at two sides of the long column of the handle; the leaf spring is arranged on the handle seat; a plurality of bumps are arranged on the leaf spring; two grooves identical to the bumps and positioning blocks are arranged on the push key; the positioning blocks are matched with an open slot in the spacer; the push key locks the long column of the handle in a fixing manner when the positioning blocks are clamped on the open slot. Thus, a dual-lock function is achieved. The spring is replaced by the strip spring plate. Thus, the service life of the crescent lock is prolonged; the crescent lock is reasonable in structure, stable to rotate, high in safety coefficient, and convenient to install; the entire product is humanized.

Description

(1) Technical field [0001] The invention relates to a door and window accessory, in particular to a crescent lock for doors and windows. (2) Background technology [0002] At present, in the field of door and window accessories, the installation and use of hardware not only ensure good water tightness, air tightness, wind resistance, and heat preservation, but also serve as an anti-theft function. At present, the ordinary crescent lock of the ordinary piece can only pass Turn the handle to achieve the locking function under the action of the tension spring. During long-term use, the spring is easy to fatigue and break, resulting in a short life of the crescent lock and a low safety factor. (3) Content of the invention [0003] In order to make up for the defects of the prior art, the present invention provides a crescent lock for doors and windows with long service life and high safety factor. [0004] The present invention is realized through the following technical so...

AI Technical Summary

Problems solved by technology

[0002] At present, in the field of door and window accessories, the installation and use of hardware not only ensures good water tightness, air tightness, wind resistance, and heat preservation, but also serves as an anti-theft function. Turn the handle to achieve the locking function under the action of the tension spring. During long-term use, the spring is prone to fatigue and fracture, resulting in a short life of the crescent lock and a low safety factor.

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