Car Door Handle Sensor Assembly for Single-Motion Locking
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Solution Overview
Problem
Existing car door systems with electronic sensing units face integration issues, leading to decreased user experience due to non-intuitive placement and requiring multiple movements for operation.
Innovation Solution
An electronic sensing unit is integrated on the external side of the car door, using strain gauges to detect user commands through a single movement, with a fixing mechanism that transmits constraints from the handle to the sensor, allowing for simultaneous locking and unlocking via push or pull actions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If an electronic sensing unit is added to detect user commands, then the automation and signal detection capability are improved, but the device complexity and user operation difficulty increase due to non-intuitive placement requiring multiple movements
Solution Approach 1:
The patent merges the electronic sensing unit with the mechanical handle structure by integrating the sensor into the handle assembly rather than placing it separately on the door. This combination allows the sensor to directly detect handle movements (push/pull actions) without requiring separate user interactions, thereby maintaining automation while preserving operational simplicity and intuitiveness
2Measurement precision
If the sensor is attached on the external side of the door, then the sensor can directly detect handle constraints, but the sensor becomes more exposed to environmental factors and requires a complex fixing mechanism
Solution Approach 1:
The patent embeds the sensor within the handle structure itself, nesting the sensing element inside the protective housing of the handle assembly. This nested configuration allows the sensor to maintain direct contact with the handle for accurate constraint detection while being protected from environmental factors by the handle's existing structure
3Reliability
If a fixing mechanism with multiple elements is used to secure the sensor, then the sensor attachment reliability is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent utilizes the handle's existing structural elements (such as the handle body, mounting holes, or fastening features already present in the handle assembly) to secure the sensor, rather than introducing a separate complex fixing mechanism. The handle structure itself serves the dual function of providing mechanical operation and sensor mounting, thereby simplifying the overall device while maintaining attachment reliability
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
Facilitates intuitive and efficient operation of car doors by enabling a single movement to unlock or lock, improving user experience and accuracy of signal detection.
Implementation Method 1
the sensor includes at least one strain gauge, said at least one strain gauge being configured to be deformed when the constraint is applied to the handle
Data Source
Figure 1~2
Figure 3~5
AI summary
Electronic sensing unit (1) for a handle (3) attached on a car door, the electronic sensing unit (1) comprises: a sensor (7) attached on an external side of a part of the car door extending according to a reference plane; a fixing mechanism (15) for the sensor (7), the fixing mechanism (15) comprising a first element (17) and a second element (19) configured to cooperate together; the first element (17) being also configured to cooperate with the part of the car door and the sensor (7); the second element (19) being also configured to cooperate with the handle (3) so that a constraint applied to the handle (3) is transmitted to the sensor (7) for detection of a command.