Abstract: A lock core assembly. The assembly includes an external cylinder, an inner cylinder rotatably fitted in the external cylinder, alignment elements provided in the inner cylinder, at least a limiting element provided in the external cylinder able to engage with the alignment elements, and a key to be inserted into the inner cylinder to move the alignment elements to an unlocking state with the limiting element. When the engaging member is detached, the limiting element is separated from the external cylinder, and then the original coupling of the key and the limiting element are substituted by another coupling of a key and a limiting element, such that, when a user loses his key, he can have the lock core assembly repaired without changing the entire lock set.

Abstract: A manual shift lever lock structure, wherein: a second hollow pipe is slipped over the shift lever, a lock cylinder is fixedly connected to the top of the shift lever to move the second hollow pipe, the first hollow pipe and the slide sleeve are slipped over the second hollow pipe, a tailing member is provided at the end of the first hollow pipe and has thereon an elastic member; the first hollow pipe has a hole for inserting therein a bead; a first annular recess and a second annular recess are respectively provided in the inner wall of the slide sleeve and the external wall of the second hollow pipe, thereby the bead drops into the first annular recess of the slide sleeve when the slide sleeve is pulled down to insert into a hole of a shift lever seat, and the slide sleeve is stopped here in engagement with the shift lever seat; and when in unlocking the shift lever, the second hollow pipe is moved and the bead drops into the space of the second annular recess of the second hollow pipe, the slide sleeve is

Abstract: A multi-sectional extendible lock structure for steering wheels. The structure includes a base portion having an inner space formed therein and having a fixing hook on the tailing end thereof; a middle rod section telescopically extending in the inner space of the base portion and also having an inner space with a fixing hook in opposition to the fixing hook on the base portion; a tailing rod section telescopically extending in the inner space of the middle rod section; a core rod extending in the tailing rod section and forming engagement between the middle rod section and the tailing rod section; and a lock barrel provided on the base portion with a locking pin thereof extending into the inner space of the base portion to make engagement with the middle rod section.

Abstract: An improved lock structure, and especially a lock structure in which a stepped shaped wall of the key hole in the lock core can be cooperated with a key to allow the key to be drawn out regardless of its angular position. The lock core can also be rotated from an unlocking position to a locking position without the key; convenience thus is increased. Besides, a plurality of pusher pins are allocated in multiple directions to increase the difficulty of unlocking by a thief, this can thereby increase theft-proof effect.