Door lock
AssigneeEversafety Precision Industry (Tianjin) Co., Ltd.
InventorFangchang Fan
Life of this patent
Estimating the term…
Abstract
A door lock includes outer assemblies, latch assemblies and inner assemblies. The inner assemblies has a turning switch, fixing bolts, an interior rose and a detent device that includes an inner plate, a stop plate, a stop seat, a rotating spring, a retaining spring and a sprag. By pressing down the stop plate as the latch bolt is in a casing, a protruding block of the stop seat is engaged with a protruding member of the stop plate. The spindle can not rotate backward and maintains in an unlocked state. After the stop plate is pressed upward, the turning switch returns to a locked state and the latch bolt extends out of the casing. Therefore, the detent device can keep the latch bolt in the casing and keep the lock in the unlocked state.
Claims11
A door lock, comprising outer assemblies, latch assemblies and inner assemblies including a turning switch, fixing bolts, an interior rose and a detent device, wherein the detent device comprises:
- an inner plate including a guiding track projected from a surface of an upper portion thereof,
- a stop plate including an opening at a lower portion thereof, a protruding member perpendicular to the stop plate at a middle portion thereof, and elongated protrusions corresponding to the guiding track at an upper portion thereof, thereby making the stop plate capable of sliding along the guiding track up and down;
- a stop seat, a hollow stepped cylinder, including a front cylinder having a positioning surface disposed at a front surface thereof, a protruding block disposed at the edge thereof, and a spring holding member projected axially from the edge thereof on the opposing side to the protruding block;
- a rotating spring engaged with the stop seat and including two ends formed with a spring arm respectively and disposed at both sides of the spring holding member respectively;
- a retaining spring disposed in a hollow portion of the stop seat and engaged with a revolving axis of the turning switch together with the stop seat, and
- a sprag pressed on the retaining spring for fixing and positioning the retaining spring.
Dependencies are inferred from the claim text.