LOCK CYLINDER AND LOCKSET
FIG4 is a structural diagram when the lock set is damaged by force
According to another aspect of the invention, there is provided a lockset, including front lock shell 40, rear lock shell 50, as well as the new lock cylinder in the above embodiment. The said front lock shell and rear lock shell are adaptively installed on the new lock cylinder. In the initial state, the lock shells are positioned on the front and back ends of the connection member, and normally, when the key is inserted into the lock shell, the key profile correctly aligns the pins and then the lock will be unlocked. But when it is unlocked by force outside the door, as shown in FIG4, the lock shell on the outside of the door is unconstrained and will detach, so that there is no obstacle in the front of the connection shaft, and the top bolt at the back of the connection shaft forwardly pushes out the connection shaft due to the action of internal compression spring. The limit through-hole of the connection shaft moves away from the position of the stop collar, and there is space both in upper and lower space, and at this time, the elastic part disposed in the limit through-hole pushes out the balls, so that the connection shaft cannot be connected to the transmission block. Because the lock-out cavity is occupied by the balls, the connection shaft cannot to be pushed into the inside, so that the lock cylinder mechanism provided by the lock set can perform the anti-force and anti-theft role.
structural diagram
24
limit through-hole
28
flange part
272
pin roller
30
transmission block
11
fixing sleeve
29
lock-out cavity flange part
271
circular grooves
20
lock cylinder mechanism
25
elastic part
31
cavity
33
top bolt
27
stop collar
10
connection member
21
unlocking cam
23
connection shaft
32
compression spring
['1. A lock cylinder,  characterised in that  it includes: a connection member having a fixing sleeve extending from it; a lock cylinder mechanism, the said lock cylinder mechanism including an unlocking cam set behind the fixing sleeve, the unlocking cam being slidably connected with the fixing sleeve, an axle sleeve disposed in the said unlocking cam, and a connection shaft in the said unlocking cam the front end of the said connection shaft extends through the fixing sleeve, and the rear end of the connection shaft features limit through-holes, the limit through-holes including an elastic part within, there being balls on both end of the elastic part, and a stop collar in the limit through-hole corresponding to the said connection shaft.', '2. A lock cylinder according to claim 1,  characterized in that  there is provided a flange part in the middle of the said connection shaft, the said connection shaft forming a lock-out cavity with the flange part and axle sleeve, the said connection shaft being set in the middle of unlocking cam, the stop collar, axle sleeve and flange part limiting the movement of the unlocking cam.', '3. A lock cylinder according to claim 1,  characterized in that  there is a transmission block in the end of the connection shaft, and there is a cavity formed in the said transmission block, there being a compression spring in the said cavity, and top bolts on the said compression spring, the said top bolts abutting with the connection shaft.']