Lockset

Abstract

The invention relates to a lockset comprising a sector plate, a slant spring bolt, a swinging arm and a shifting fork, which are arranged in a lock case, wherein the shifting fork is connected with the swinging arm which is connected with the sector plate, and the sector plate is connected with the slant spring bolt; the lock case comprises a spring bolt case and a cover plate, and the swinging arm comprises an upper swinging arm and a lower swinging arm, which are connected with each other by a swinging arm shaft; and one end of the swinging arm, which faces the sector plate, is provided with a contact head which enlarges the contact area of the swinging arm and the sector plate. The contact head is a connecting plate or a connecting pin arranged between the upper swinging arm and the lower swinging arm or can be bend or bulge, which is respectively and oppositely arranged at one end of the upper swinging arm and one end of the lower swinging arm . A clearance space for avoiding the movement of the slant spring bolt is arranged between the upper swinging arm and the lower swinging arm. The lockset has the advantages of simple and reasonable structure, low manufacturing cost, long service life and high safety.

Description

technical field [0001] The invention relates to a lock. Background technique [0002] Common locks, see attached figure 1 - attached Figure 9 As shown, the lock housing includes a cover plate 7 and a deadbolt housing 5, and the lock housing is provided with a fan-shaped plate 1, an oblique lock tongue 2, a swing arm 3, a shift fork 4 and a safety plate 6, and the swing arm 3 includes an upper swing arm 3.2 and The lower swing arm 3.3, the upper swing arm 3.2 and the lower swing arm 3.3 are connected as a whole through the swing arm shaft 3.1, and the end of the lower swing arm 3.3 is pressed against one end of the fan-shaped plate. When the lower swing arm 3.3 exerts pressure on the fan-shaped plate, the oblique lock will be driven Tongue retracted. [0003] When unlocking, the handle drives the shift fork 4 to rotate, the shift fork 4 drives the swing arm 3 to rotate, the protrusion 3.4 on the swing arm 3 presses against one end of the sector plate 1, and drives the sec...

AI Technical Summary

Problems solved by technology

[0004] When the swing arm 3 pulls the oblique bolt 2 back, the oblique bolt 2 first contacts the safety plate 6, and when the swing arm 3 continues to rotate, the oblique bolt 2, the safety plate 6, the lower swing arm 3.3 and the sector plate 1, etc. The components are stressed at the same time; when the swing arm 3 is in a stressed state, the lower swing arm 3.3 is subjected to twisting force, the swing arm shaft 3.1 is subjected to bending force, and the upper swing arm 3.2 is basically not stressed; when the shift fork is continued to be rotated, the oblique bolt 2. Parts such as insurance plate 6, lower swing arm 3.3 and sector plate 1 will be subjected to greater force, which will cause distortion and deformation of related parts, and finally lead to failure of the entire lock

Therefore, the service life of the lock with this structure is relatively short, and the degree of safety is relatively low.

Images