Door Handle Assembly Transmission Mechanism for Consistent Lock Actuation
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Solution Overview
Problem
Existing door handle assemblies with flexible door lock cables face challenges in maintaining a consistent movement direction, leading to variable movement paths and directions, which can affect the reliability of door locking and unlocking mechanisms.
Innovation Solution
The proposed door handle assembly incorporates a transmission assembly and a door lock lever driving component, where the handle moves between hidden, extended, and pulled positions, driving the transmission assembly to rotate and thereby controlling the movement of the door lock lever driving component between locked and unlocked positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a flexible door lock cable is used, then the handle can be pulled easily, but the movement direction becomes variable and unreliable
Solution Approach 1:
A transmission assembly is introduced as an intermediary mechanism between the flexible door lock cable and the door lock lever. This transmission assembly includes a cable drum, a lever arm, and a pivot point that work together to convert the variable-direction pull on the flexible cable into a consistent rotational motion that reliably actuates the door lock lever.
Solution Approach 2:
The system changes the parameter of movement direction from variable (in the flexible cable) to fixed (in the door lock lever actuation). The transmission assembly achieves this by converting linear/polydirectional cable movement into unidirectional rotational motion through its mechanical geometry, ensuring reliable and consistent door lock engagement.
2Adaptability or versatility
If a flexible material is used for the door lock cable, then the cable can bend and follow variable paths, but the movement path becomes inconsistent
Solution Approach 1:
The transmission assembly serves as a mediator that accepts the adaptable, variable-path movement of the flexible cable and transforms it into a stable, predictable rotational motion. The cable drum and lever arm mechanism ensures that regardless of the cable's bending path, the output motion remains consistent and reliable.
Solution Approach 2:
The system separates the flexible cable function (providing adaptable routing) from the precise actuation function (requiring consistent motion). By dividing the system into these distinct functional segments, each component can optimize for its specific requirement while the transmission assembly bridges the gap between them.
Data Source
AI summary
The present disclosure discloses a door handle assembly. The door handle assembly includes a base, a handle, a transmission assembly, and a door lock lever driving component. The base defines a receiving space. The handle is arranged in the receiving space and movable relative to the base. The transmission assembly is rotatable relative to the base. The door lock lever driving component is connected to the transmission assembly and has a locked position and an unlocked position, and the door lock lever driving component is movable relative to the base between the locked position and the unlocked position. A movement of the handle relative to the base is capable of driving rotation of the transmission assembly relative to the base, to drive the door lock lever driving component to move from the locked position to the unlocked position. The door handle assembly of the present disclosure is suitable for a door lock lever made of a hard material (e.g., metal, or plastic), has a simple structure and a stable movement, and can drive the door lock lever driving component to move between the locked position and the unlocked position, thereby enabling locking and unlocking of a door lock.