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US 2012/0125061 A1Published application
Linkage anti-theft lock head
AssigneePingdingshan Dahan Lock Co., Ltd.
InventorsChangluo Zhu, Jiekuan Sun, Mu Lin, Jiquan Yu
Life of this patent
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AssigneePingdingshan Dahan Lock Co., Ltd.
InventorsChangluo Zhu, Jiekuan Sun, Mu Lin, Jiquan Yu
Estimating the term…
A linkage anti-theft lock head comprises a lock tube (16), a lock core (2), a brake bar (19), a front tumbler (6) with its return spring (20), a rear tumbler (9) with its return spring (20) and a key (1). Clearance fits are provided between the front tumbler (6) and the rear tumbler (9) with the holes (26) distributed axially on the lock core (2). The brake bar (19) is mounted axially along the lock core (2). Brake teeth of the brake bar (19) engage with the teeth grooves of the front tumbler (6) and the rear tumbler (9). Said engagement is a linkage engagement. A brake groove (17) is set on the lock tube (16) to match with the brake bar (19). The tumblers, the brake bar (19) and the lock core (2) constitute a cant device, wherein the front tumbler (6) and the rear tumbler (9) act as moving cams set oppositely, the brake bar (19) acts as a driven member and the lock core (2) acts as a rack.
A linkage anti-theft lock head, comprising a lock tube, a lock core, a brake bar, a front tumbler with its return spring, a rear tumbler with its return spring and a key. Clearance fits are provided between said front tumbler and the rear tumbler and the tumbler holes distributed axially on the lock core, said brake bar is mounted axially along the lock core thereof, brake teeth of the brake bar engage with the tooth grooves of the front tumbler and the rear tumbler, characterized in that a mobile cam device is formed with the front tumbler and the rear tumbler acting as moving cams set oppositely, the brake bar acting as a driven member and the lock core acting as a rack, the brake teeth of the tooth grooves of the front tumbler and the rear tumbler are engaged to form a linkage engagement, and a brake groove is formed on the lock tube to engage with the brake bar.
Dependencies are inferred from the claim text.