# US 4,395,064 A · Electric automobile trunk lock mechanism

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- Number: US 4,395,064 A
- Document ID: US4395064A
- Status: Granted
- Kind: A
- Application number: 06/253,909
- Filed: 1981-04-14
- Granted: 1983-07-26
- Earliest claimed: 1980-04-14
- Assignees: Regie Nationale des Usines Renault
- Inventors: Dominique Bellot; Michel Barre
- Web page: https://patentgrep.com/patent/US4395064A

## CPC

- E05B 81/20: for assisting final closing or for initiating opening
- E05B 81/14: operating on bolt detents, e.g. for unlatching the bolt
- Y10T 292/1082: Motor
- Y10T 292/57: Operators with knobs or handles
- E05B: LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

An electrical lock mechanism for servo locking and unlocking the trunk lid or hatch lid of an automobile by means of a motorized bolt engaging a catch to close the door is disclosed. The lid supports a fixed catch and the body of the vehicle supports a compact motor unit comprising an electric motor, controlled from a distance by impulses and capable of sequentially pivoting a rotating bolt and its blocking lever. The motor is connected to the bolt and lever by two disengageable link rods.

## Claims

### Claim 1

An electric lock mechanism for the servo locking and unlocking of a vehicle hatch lid, comprising a fixed catch mounted on said hatch lid and a compact motor unit mounted on the body of said vehicle, wherein said compact motor unit comprises:
an electric motor having a shaft;
a rotary bolt engagable with said catch;
a blocking lever adapted to block said bolt in a locked position;
crankshaft means connected to said motor shaft;
first and second links respectively connecting said crankshaft means to said bolt and said blocking lever; and
means for rotating said electric motor shaft by half turn intervals in a first direction;
whereby each half turn of said motor shaft alternately locks and blocks said lock, and unlocks and unblocks said lock.

### Claim 2 (depends on 1)

The mechanism of claim 1, including:
a plate mounted to said body upon which said bolt and blocking lever are rotatably mounted;
return springs biasing said bolt and blocking lever in first rotary positions;
first and second pins respectively mounted on said bolt and blocking lever,
first and second slides respectively formed in said first and second links, said first and second pins being respectively slidably positioned in said first and second slides,
wherein said crankshaft means comprise first and second cranks having distal ends circumferentially spaced by 180.degree., said ends being respectively pivotally connected to the ends of said first and second links.

### Claim 3 (depends on 1)

The mechanism of claim 1 wherein said means for rotating comprises an electric impulse generating means including a contact positioned adjacent said bolt such that said contact detects said catch when said catch reaches a position on the rotational trajectory of the fork of said bolt.

### Claim 4 (depends on 1)

The mechanism of claim 1 wherein said means for rotating comprises an electric impulse generating means including a contact positioned to be activated by the movement of an exterior control.

### Claim 5 (depends on 1)

The mechanims of claim 1 including a third link connecting an exterior control to said blocking lever for rotation of said blocking lever.

### Claim 6 (depends on 2)

The mechanism of claim 2 wherein said pins have enlarged ends and said slides have enlarged portions, whereby said pins may be disengaged from said slides only at said enlarged portions.