Dual Hook Vehicular Door Lock Device for Striker Sandwiching
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Solution Overview
Problem
In vehicles with double slide doors, a striker cannot be installed on the center pillar, necessitating a door lock device that can restrain the slide door in a full closed position without a striker on the center pillar, and this challenge is common to vehicles without a striker facing the door's end portion in a closing direction.
Innovation Solution
A vehicular door lock device with a base fixed to the door or vehicle body, featuring first and second hooks rotatably supported by the base, and a driving mechanism that positions these hooks to engage or retract, sandwiching a striker on the door or vehicle body, allowing for secure locking regardless of the striker's location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a striker is installed on the center pillar, then the door lock device can achieve secure locking, but the vehicle structure becomes more complex and the striker cannot be installed in vehicles with double slide doors
Solution Approach 1:
The door lock device is segmented into two separate hooks instead of using a single traditional latch mechanism. This segmentation allows the hooks to engage with the striker from different positions, enabling secure locking without requiring the striker to be located on the center pillar, thus solving the structural complexity issue while maintaining locking reliability
Solution Approach 2:
The door lock device is designed with universal applicability through its two-hook mechanism that can function effectively regardless of whether the vehicle has double slide doors or not, and regardless of the striker's specific location. This multi-functional design eliminates the need for center pillar striker installation while achieving secure locking
2Device complexity
If a traditional single latch mechanism is used, then the device configuration is simple, but it cannot provide sufficient impact resistance and cannot restrain the door in full closed position without a center pillar striker
Solution Approach 1:
The single latch mechanism is divided into two separate hooks that work together. This segmentation provides superior impact resistance because the two hooks distribute the locking force and engage with the striker from different angles, preventing the door from being pried open during impact while maintaining a relatively simple overall device configuration
Solution Approach 2:
The two hooks are combined within a single door lock device housing, integrating their functions into one unified mechanism. This merging approach provides enhanced impact resistance through the cooperative action of both hooks while keeping the device configuration compact and relatively simple, avoiding the need for multiple separate locking mechanisms
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device effectively restrains the slide door in a full closed position, providing flexibility in striker placement and ensuring secure locking without the need for a center pillar striker, while also simplifying the configuration and enhancing impact resistance.
Implementation Method 1
a first hook (421) and a second hook (422) which rotate about a shaft line extending in a vehicle width direction between an engaged position of sandwiching the lower striker (26) and a retracted position
Implementation Method 2
a driving link (43) that transmits power to the first hook (421) and the second hook (422)
Implementation Method 3
restrains the slide door (30) to the vehicle body (20)
Data Source
AI summary
A lower lock device includes a base being fixed to a slide door, a first hook and a second hook each including a base end portion being rotatably supported by the base, and a driving link that is rotatably supported by the base, and drives the first hook and the second hook. The first hook and the second hook rotate between an engaged position of sandwiching a lower striker by tip portions being close to each other and a retracted position in which the tip portions are separated from each other. The driving link is displaced between a first position in which the first hook and the second hook are disposed in the engaged position and a second position in which the first hook and the second hook are disposed in the retracted position.