| 摘要 |
A lock has a keypad which operates members that can be disposed to allow movement to the locking device. The keys of the keypad are formed from elastomeric material and mounted at a matrix on elastomeric arms. The lock includes pins that can prevent the locking member moving and a device which re-sets the keys after they have been depressed. The lock also includes a casing formed in two parts, one 12 carrying the keys and the other 11 carrying the members and the locking device. The handle of the lock includes a clutch device which prevents the mechanism being strained when the handle is turned with the lock locked. One key can be a prime key that must be depressed before the other keys are depressed to release a device that normally prevents unlocking movement of the other members. The lock includes a rotatable member for connection to a handle which meshes with the second rotatable member which is either held against rotation or released for rotation to lock or unlock the rotatable member. The lock includes a mounting plate 10 and a handle loaded by a spring into a first position. A device is provided to hold the handle in a second position against the action of the spring angularly spaced from the first position. The lock includes a latch bolt with a retractable bolt and a snap fit casing. |
