cylinder lock

A cylinder type, lock technology, applied in the field of door latch components, can solve the problems of weak handle holding force, hard spring, etc., and achieve the effect of good strength
CN103306538BActive Publication Date: 2016-07-06TOWNSTEEL
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TOWNSTEEL
Publication Date
2016-07-06

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Abstract

PURPOSE: A cylindrical lockset is provided to have a small volume, to be cost effective, and to obtain excellent strength, durability, and multiple functions. CONSTITUTION: A cylindrical lockset includes a latch, a locking cage, a retractor (250), rotary shaft bearings (120), handle-operable spindles (70, 80), and spindle return springs (15). The locking cage is installed inside a cylindrical bore of a door penetrating through an inner door surface from an outer door surface. The retractor is embedded inside the locking cage and makes inner and outer door handles retract the latch. The rotary shaft bearings are installed on the locking cage. The rotary shaft return sprints biases the handle-operable spindles to the original position. The locking cage is formed of a metal sheet and partitioned into inner, middle, outer locking cage portions, which are mutually adjacent, in an axial direction. The retractor is embedded inside the middle locking cage portions, and the rotary shaft bearings are embedded inside the inner and outer locking cage portions.
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Description

technical field

[0001] The present invention relates to a door latch assembly, and more particularly to a cylinder lock. Background technique

[0002] Traditional commercial grade cylinder locks are bulky and expensive to manufacture. figure 1 Is a perspective view of a conventional commercial grade prior art cylinder lock 4 having an inner rosecage 5 housing a lever return spring. figure 2 for figure 1 A perspective view of the trimless lock 4 of , showing a single compartment lock body 6 including only a retractor, but no return spring. The lock 4 is bulky and its decoration is very large (as it houses the inner rosecage 5) and protrudes.

[0003] image 3 Is a perspective view of another conventional commercial grade prior art cylinder lock 7 in which a large cast spindle bearing 8 is provided to accommodate the rod return spring. Figure 4 for image 3 A perspective view of the de-decorated lock 7 of , showing only the lock housing and cover 9 including the retrac...

Claims

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