Door lock system

Claim 2

A door lock system comprising: a first assembly which comprises lock means (19) for locking a first door when said lock means is in a lock position and unlocking the first door when said lock means is in an unlock position, control means (23, 31), connected with said lock means, for moving said lock means between the lock position and the unlock position, said control means being capable of moving between a lock control position and an unlock control position, said control means holding said lock means in the lock position when said control means is in the lock control position, and in the unlock position when said control means is in the unlock control position, said control means being capable of moving beyond the lock control position to a lock over position, positioning means (32) for enabling said control means to stop in the lock control position and in the unlock control position, and position sensing means (29), connected with said control means, for producing a lock signal when said control means is moved beyond the lock control position to the lock over position, and actuating means connected with said position sensing means to receive the lock signal.

Claim 3

A door lock system according to Claim 1, wherein said control means is capable of moving beyond the unlock control position to an unlock over position, and said position sensing means produces an unlock signal when said control means is moved beyond the unlock control position to the unlock over position.

Claim 4

A door lock system according to Claim 2, further comprising a stationary casing (1, 2, 3) supporting said lock means and said control means, and wherein said positioning means is disposed between said control means and said casing, said positioning means comprising a spring (32b) which is retained by said casing, and a push member (32c) which is pushed by said spring against said control means, said control means being formed with a lock recess (31b) which receives said push member when said control means is in the lock control position, and an unlock recess (31a) which receives said push member when said control means is in the unlock control position.

Claim 5

A door lock system according to Claim 3, wherein said control means comprises a control lever (31) swingable in a swing plane, said lock and unlock recesses being formed in a surface of said control lever which is substantially parallel to the swing plane, said spring of said positioning means pushing said push member in a direction substantially normal to the swing plane.

Claim 6

A door lock system according to Claim 4, wherein said control lever is further formed with a first guide slope (31c) adjacent to said lock recess, said lock recess lying between said first guide slope and said unlock recess, said first guide slope being so inclined as to push said push member and compress said spring more and more as said control means is moved away from the lock control position toward the lock over position.

Claim 7

A door lock system according to Claim 5, wherein said control lever is further formed with a second guide slope (31g) adjacent to said unlock recess, said unlock recess lying between said second guide slope and said lock recess, said second guide slope being so inclined as to push said push member and compress said spring more and more as said control means is moved beyond the unlock control position to the unlock over position.

Claim 8

A door lock system according to Claim 6, wherein said lock means comprises a lock lever (19) swingable in a plane substantially parallel to the swing plane of said control lever, said lock lever having a first end (19a) about which said lock lever is swingable, and a swingable second end which is formed with a slot (35), said control lever having a first arm having a pin (34) which is fixed thereto and slidably received in the slot of said lock lever.

Claim 9

A door lock system according to Claim 7, further comprising a second assembly capable of locking and unlocking a second door, and wherein said actuating means is connected with said second assembly for actuating said second assembly to lock the second door in response to the lock signal and to unlock the second door in response to the unlock signal.

Claim 10

A door lock system according to Claim 8, wherein said lock means remains in the lock position for holding the first door locked when said control means is moved beyond the lock control position to the lock over position, and in the unlock position for holding the first door unlocked when said control means is moved beyond the unlock control position to the unlock over position.

Claim 11

A door lock assembly according to Claim 9, wherein said first assembly further comprises latch means which comprises a latch member (7) for latching the first door when said latch member is in a latch position, and unlatching the first door when said latch member is in an unlatch position, and pawl means (10, 12) movable between a detaining position and a releasing position, said pawl means preventing said latch member from moving from the latch position to the unlatch position when said pawl means is in the detaining position, and allowing said latch member to move freely when said pawl means is in the releasing position, said pawl means having a spring which normally holds said pawl means in the detaining position, said lock means preventing said pawl means from moving from the detaining position to the releasing position when said lock means is in the lock position.

Claim 12

A door lock system according to Claim 10, wherein said door lock system is adapted to be mounted on a vehicle for locking and unlocking doors of the vehicle, the first and second doors being doors of the vehicle, the first door having an inside handle, an outside handle, an inside lock knob and a key lock unit, and wherein said first assembly further comprises a swingable inside handle lever (22) which is so connected with the inside handle of the first door as to be swung by the movement of the inside handle, and capable of moving said pawl means from the detaining position to the releasing position by swinging and pushing a first portion (12c) of said pawl means, and a swingable outside handle lever (15) which is so connected with the outside handle of the first door as to be swung by the movement of the outside handle, and capable of moving said pawl means from the detaining position to the releasing position by swinging, said control means further comprising a swingable lock knob lever (23) which is connected with the inside lock knob of the first door to be swung by the movement of the inside lock knob, said lock knob lever having a swingable end connected with a swingable end of said control lever so that the swingable end of the lock knob lever swings together with the swingable end of said control lever, said control lever being connected with the key lock unit of the first door to be swung by the movement of the key lock unit.

Claim 13

A door lock system according to Claim 11, wherein the first end of said lock lever is pivotally supported by a swingable arm of said outside handle lever, said lock lever being capable of moving longitudinally in a reciprocating manner with the swing motion of said outside handle lever, said lock lever being capable of swinging between the lock position and the unlock position about the first end supported by said outside handle lever with the swing motion of said control lever, said lock lever having a third portion (19c) which lies close to a second portion (12a) of said pawl means when said lock lever is in the unlock position and apart from the second portion of said pawl means when said lock lever is in the lock position, said lock lever further having a fourth portion (19d) which lies close to a third portion (12b) of said pawl means when said lock lever is in the lock position and apart from the third portion of said pawl means when said lock lever is in the unlock position, said third portion of said lock lever pushing said second portion of said pawl means when said lock lever moves longitudinally in the unlock position, said fourth portion of said lock lever preventing said pawl means from moving from the detaining position to the releasing position when said lock lever is in the lock position.