A chain lock is provided. The chain lock includes a lock body and a linkage chain. The lock body has a lock core and a lock body side surface. The linkage chain is formed via linking a plurality of link plates and has a first end and a second end. The first end is joined with the lock body. The second end can be inserted into a socket and secured by the lock core. The linkage chain can be wound around the lock body when the second end is unlocked, and wherein at least one of the plurality of link plates, except the link plates serving as the first end and the second end, engages the lock body side surface when the linkage chain is wound around the lock body.

A method for unlocking a lock may include receiving, via a network, a first service request to unlock a lock from a terminal device. The first service request may be associated with a wireless connection between the lock and the terminal device. The method may also include transmitting, via the network, a password associated with the first service request to the terminal device and receiving an input associated with the terminal device. The method may further include determining whether the received input satisfies an unlocking condition and actuating, based on a result of the determination that the received input satisfies the unlocking condition, a locking mechanism to unlock the lock.

A releasable ratchet strap having a plurality of strap teeth and a robust flexible inner core connected to a housing having a lock mechanism. A lever is hingedly connected to the housing. The housing retains a lock pin having at least one recess. The lock mechanism is oriented in an unlocked configuration when at least one recess of the lock pin is in alignment with a portion of the latch. When the latch is depressed, the latch tooth of the latch is released from contact with a strap tooth of the ratchet strap. When the lock mechanism is oriented in a locked orientation, no recess of the lock pin is in alignment with a portion of the latch. In a locked orientation, the lock pin obstructs the latch from hingedly pivoting and the latch tooth engages the strap tooth of a ratchet strap.

An exemplary ring lock generally includes a case, a shackle, and a lock mechanism. The shackle is movably mounted to the case. The lock mechanism is operable to selectively retain the shackle in a closed position. The case includes a first case portion including a first flange, and a second case portion including a second flange. In certain forms, the first flange and the second flange are welded to one another. In certain forms, the first flange and/or the second flange has a depth of one centimeter or less. In certain forms, the case includes at least one ramp configured to discourage gripping of the case.

An exemplary ring lock generally includes a case, a shackle, and a lock mechanism. The shackle is movably mounted to the case. The lock mechanism is operable to selectively retain the shackle in a closed position. The case includes a first case portion including a first flange, and a second case portion including a second flange. In certain forms, the first flange and the second flange are welded to one another. In certain forms, the first flange and/or the second flange has a depth of one centimeter or less. In certain forms, the case includes at least one ramp configured to discourage gripping of the case.

An anti-theft lock is provided, comprising: a lock pin provided with a retaining groove and configured to realize unlocking or locking through movement of the lock pin; a tongue configured to be able to enter the retaining groove to stop the movement of the lock pin or move out of the retaining groove to release the lock pin to allow the lock pin to move; and a tongue driving member connected to an output shaft of a motor and configured to convert a rotational driving force of the motor into a driving force allowing the tongue to move out of the retaining groove.

The invention relates to an anti-theft device that is both highly resistant to attack by hand-carried bolt cutters and saw blades while also exhibiting a weight suitable for use with bicycles. The device is made with a plurality of interlinked titanium alloy arm members, each of which exhibits a hardness of HRC 30 or more and a cross-sectional distance of 8 mm or more.

The invention relates to an anti-theft device that is both highly resistant to attack by hand-carried bolt cutters and saw blades while also exhibiting a weight suitable for use with bicycles. The device is made with a plurality of interlinked titanium alloy arm members, each of which exhibits a hardness of HRC 30 or more and a cross-sectional distance of 8 mm or more.

The invention relates to an anti-theft device (100) configured for being attached to merchandise to be protected, in particular textile products, wherein the anti-theft device (100) comprises a housing (102) and a locking mechanism (130), which has a needle (106), wherein the needle (106) is adjustable between a locking position, in which it engages with the merchandise to be protected, and a release position, in which detachment and removal of the anti-theft device (100) from the merchandise to be protected are permitted, wherein the needle (106) has a curved, preferably arcuate shape and is accommodated in the housing (102) when in the release position.

The invention relates to an anti-theft device (100) configured for being attached to merchandise to be protected, in particular textile products, wherein the anti-theft device (100) comprises a housing (102) and a locking mechanism (130), which has a needle (106), wherein the needle (106) is adjustable between a locking position, in which it engages with the merchandise to be protected, and a release position, in which detachment and removal of the anti-theft device (100) from the merchandise to be protected are permitted, wherein the needle (106) has a curved, preferably arcuate shape and is accommodated in the housing (102) when in the release position.