Electric/manual door lock operating mechanism

• US 4,093,289 A
• Filed: 04/05/1977
• Issued: 06/06/1978
• Est. Priority Date: 04/07/1976
• Status: Expired due to Term

• Current Assignee: Tanaka Instrument Company Limited (DENSO Corporation), Toyo Kogyo Co Ltd (Mazda Motor Corporation)
• Original Assignee: Tanaka Instrument Company Limited (DENSO Corporation), Toyo Kogyo Co Ltd (Mazda Motor Corporation)
• Inventors: Watanabe, Jun, Inabayashi, Akira
• Primary Examiner(s): Moore, Richard E.
• Application Number:
  US05/784,757
• Time in Patent Office: 427 Days
• Field of Search: 292/201, 292/336.3, 292/341.16, 292/347, 292/DIG. 62
• US Class Current: 292/336.3
• CPC Class Codes: E05B 81/25 Actuators mounted separately from the lock and controlling the lock functions through mechanical connections
• CPC Class Codes: Y10S 292/62 Lost motion connections
• CPC Class Codes: Y10T 292/1082 Motor
• CPC Class Codes: Y10T 292/57 Operators with knobs or handles

Abstract

A vehicle door lock operating mechanism wherein a reversible electric motor 6 drives a pivotally mounted sector gear 10 through a centrifugal clutch 7 and reduction gears 8, 9 and 32. The sector gear is coupled to the pivotal actuating lever 2 of a lock mechanism 1 by means (ex. slot 13 and guide pin 14) which permit the free travel or play of the actuating lever over a distance equal to its stroke between the locked and unlocked positions. A manual operating knob 3 is also coupled to the lever 2, and a spring 15 biases the sector gear 10 back into a neutral or middle position whenever the motor 6 is deenergized, whereby low force manual operation may be performed independently of the sector gear and reduction gears. The centrifugal clutch, when disengaged in response to the motor deenergization, enables the spring 15 to easily drive the sector gear back into its neutral position.

Claims

1. A vehicle door lock operating mechanism, comprising:

(a) a door lock mechanism,

(b) actuating means connected to said lock mechanism and movable between a locked position and an unlocked position,

(c) operating means connected to said actuating means for manually moving same between said locked and unlocked positions,

(d) a reversible electric motor,

(e) a pivotal member movable between a locking position, an unlocking position, and a neutral position,

(f) reduction gear means engageable between said electric motor and said pivotal member for implementing the movement of the latter from its neutral position to either its locking position or its unlocking position by the selective energization of said electric motor,

(g) means connecting said actuating means and said pivotal member and including means for permitting a limited degree of free movement of said actuating means independent from said pivotal member when the latter is in its neutral position, whereby the lock mechanism may be manually operated independendly of said motor and reduction gear means, and

(h) spring means for biasing said pivotal member towards its neutral position.

2. A door lock operating mechanism as claimed in claim 1, further comprising a centrifugal clutch operatively coupled between said electric motor and said reduction gear means for transmitting the rotary motion of said electric motor to said reduction gear means and for enabling said spring means to bias said pivotal member into its neutral position independently of said electric motor.

3. A door lock operating mechanism as claimed in claim 2, wherein said centrifugal clutch comprises a plurality of weight members freely movable in a radial direction in response to the rotary motion of said electric motor but rotatable together therewith, and a cylindrical member surrounding said weight members, engaged with said reduction gear means, and engageable with said weight members.

4. A door lock operating mechanism as claimed in claim 2, wherein said connecting means includes:

(a) linkage means pivotally coupled to said pivotal member at one end and defining a pair of spaced abutments at the other end, the distance between said abutments being substantially equal to the movement of said actuating means between its locked and unlocked positions, and

(b) means for enabling the movement of said actuating means between said abutments.

5. A door lock operating mechanism as claimed in claim 4, wherein the other end of said linkage means comprises an elongated slot, the abutments are defined by the opposite ends of said slot, and the enabling means comprises a member operatively coupled to said actuating means and slidably disposed in said slot.

6. A door lock operating mechanism as claimed in claim 4, wherein the other end of said linkage means comprises a pivotally mounted sector member, the abutments are defined by projection means on said sector member, the enabling means comprises means mounting the actuating means for pivotal movement about the same axis as said sector member, and the actuating means is movably disposed between said projections.

7. A door lock operating mechanism as claimed in claim 2, wherein said connecting means comprises an elongated slot in said actuating means, and linkage means pivotally coupled to said pivotal member at one end and slidably engaging said slot at the other end for relative movement between the ends thereof, the length of said slot being substantially equal to the movement of said actuating means between its locked and unlocked positions.

8. A door lock operating mechanism as claimed in claim 2, wherein said connecting means comprises an elongated slot in said pivotal member, and linkage means pivotally coupled to said actuating means at one end and slidably engaging said slot at the other end for relative movement between the ends thereof, the length of said slot being substantially equal to the movement of said actuating means between its locked and unlocked positions.

9. A door lock operating mechanism as claimed in claim 2, wherein said connecting means comprises linkage means pivotally coupled to said actuating means at one end and having an elongated slot at the other end, and means operatively coupled to said pivotal member and slidably disposed in said slot, the length of said slot being substantially equal to the movement of said actuating means between its locked and unlocked positions.

10. A door lock operating mechanism as claimed in claim 2, wherein said connecting means comprises said actuating means being configured as a pivotally mounted sector member having a pair of spaced projections defined thereon, linkage means pivotally coupled to said pivotal member at one end, a lever member mounted for pivotal movement about the same axis as said sector member and movably disposed between said projections, and means pivotally coupling the other end of said linkage means to said lever member, the distance between said projections being substantially equal to the movement of said actuating means between its locked and unlocked positions.

11. A door lock operating mechanism as claimed in claim 2, wherein said spring means is mounted on said pivotal member.

12. A door lock operating mechanism as claimed in claim 2, wherein said spring means is disposed around said connecting means.

13. A door lock operating mechanism as claimed in claim 2, further comprising supplemental spring means for assisting the movement of said actuating means toward said locked and unlocked positions.