An electric lock includes an input switching clutch for selectively transmitting electric or manual driving force to an output line. The input switching clutch includes an outer ring that rotates together with an electrically driven input gear, and an inner ring which rotates together with an output
An electric lock includes an input switching clutch for selectively transmitting electric or manual driving force to an output line. The input switching clutch includes an outer ring that rotates together with an electrically driven input gear, and an inner ring which rotates together with an output gear. Wedge-shaped spaces are defined between the outer ring and the inner ring. Two rollers are mounted in each wedge-shaped space and are biased toward narrow portions of the wedge-shaped space by a coil spring also mounted in the wedge-shaped space. The input switching clutch further includes an unlocking piece having crossbars inserted at both circumferential ends of the respective wedge-shaped spaces, and coupled to a manually driven input shaft so that rotation of the manually driven input shaft can be transmitted thereto; and a torque transmission mechanism for transmitting the rotation of the manually driven input shaft to the inner ring.
대표청구항▼
1. An electric lock comprising: a first input member configured to be rotationally driven under an electric driving force from a driving motor;a second input member configured to be rotationally driven under a manual driving force from one of a key and a thumb turn;an output member configured to mov
1. An electric lock comprising: a first input member configured to be rotationally driven under an electric driving force from a driving motor;a second input member configured to be rotationally driven under a manual driving force from one of a key and a thumb turn;an output member configured to move a dead bolt forward and backward;a reverse input blocking mechanism configured to allow transmission of the electric driving force from the driving motor to the first input member, and to lock up when reverse input torque is applied to the first input member, thereby keeping the first input member stationary; andan input switching clutch configured to selectively transmit either one of the electric driving force applied to the first input member and the manual driving force applied to the second input member, to the output member,whereby the electric lock can be locked and unlocked with either of the electric driving force and the manual driving force,wherein the input switching clutch includes: an outer ring configured to rotate together with the first input member;an inner ring provided radially inwardly of the outer ring, and configured to rotate about a rotation axis of the second input member together with the output member; anda plurality of rollers between the outer ring and the inner ring,wherein the input switching clutch is configured such that when the electric driving force is applied to the first input member, the outer ring becomes locked to the inner ring through the rollers so that the electric driving force is transmitted to the inner ring and the output member, and such that when the manual driving force is applied to the second input member, and the second input member is rotated under the manual driving force, the outer ring and the inner ring are unlocked from each other first, and thereafter, the manual driving force is transmitted to the inner ring and the output member. 2. The electric lock of claim 1, wherein the inner ring of the input switching clutch has an outer periphery including a plurality of circumferentially arranged cam surfaces, and the outer ring of the input switching clutch has a cylindrical inner peripheral surface, to define, between each of the circumferentially arranged cam surfaces of the inner ring and the cylindrical inner peripheral surface, a wedge-shape space which narrows toward respective circumferential ends thereof, and in which two of the rollers and a spring are mounted such that the rollers are pushed by the spring into respective narrow circumferential end portions of the wedge-shaped space,wherein the input switching clutch further includes an unlocking piece having crossbars inserted on both circumferential sides of the respective wedge-shaped spaces, and coupled to the second input member such that rotation can be transmitted to the second input member, and a torque transmission mechanism between the second input member and the inner ring, and configured such that rotation of the second input member is transmitted to the inner ring through the torque transmission mechanism with an angular delay, andwherein the input switching clutch is configured such that when the electric driving force is applied to the first input member, the outer ring, which is configured to rotate together with the first input member, becomes locked to the inner ring through the rollers so that the electric driving force is transmitted to the inner ring and the output member, and such that when the manual driving force is applied to the second input member, one of the two rollers in each of the wedge-shaped spaces, which are opposed to each other in a rotational direction, is pushed toward a wide portion of the wedge-shaped space by a corresponding one of the crossbars of the unlocking piece, which is configured to rotate together with the second input member, against an elastic force of the spring in the wedge-shaped space so that the outer ring and the inner ring are unlocked from each other, and thereafter, the manual driving force is transmitted to the inner ring and the output member through the torque transmission mechanism. 3. The electric lock of claim 1, wherein the reverse input blocking mechanism is a worm gear mechanism including a worm gear configured such that the electric driving force from the driving motor is applied to the worm gear, and a worm wheel meshing with the worm gear and coupled to the first input member such that rotation can be transmitted to the first input member, the reverse input blocking mechanism having a self-locking function. 4. The electric lock of claim 2, wherein the reverse input blocking mechanism is a worm gear mechanism including a worm gear configured such that the electric driving force from the driving motor is applied to the worm gear, and a worm wheel meshing with the worm gear and coupled to the first input member such that rotation can be transmitted to the first input member, the reverse input blocking mechanism having a self-locking function. 5. The electric lock of claim 2, wherein each wedge-shape space narrows gradually toward respective circumferential ends thereof. 6. The electric lock of claim 2, wherein the angular delay is a slight angular delay.
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이 특허에 인용된 특허 (7)
Soloviff Paul G. (Tustin CA) Lichtenfels William C. (West Hartford CT), Alternate manually and electrically actuated bolt.
Fish Aaron M. (Hampstead CAX) Branover Alexander (St. Laurent CAX) Leszek Zgorzak (Montreal CAX), Cylindrical and permutation lock arrangements with clutch.
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