Rotary Switch for Vehicle Parking Brake Control
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Solution Overview
Problem
Electronic parking brake devices for commercial vehicles often have complex structures and are less intuitive to operate, leading to potential incorrect operation by drivers and reduced operational safety.
Innovation Solution
A rotary switch with a rotary knob and counterpart that allows both rotary movement and axial displacement, providing distinct switching states for actuation, release, trailer test, and gradual braking functions, enhancing operational simplicity and safety through clear and intuitive control mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple control functions are integrated into the actuating device, then the functionality and control options increase, but the structure becomes complex and operation becomes less intuitive
Solution Approach 1:
The actuating device is segmented into two independent rotary switches, each responsible for a specific braking function (service brake and parking brake). This segmentation simplifies the structure of each individual switch while collectively providing comprehensive control options for multiple braking functions.
Solution Approach 2:
Each rotary switch is designed with multiple switching states that can control different braking functions. The service brake rotary switch can control both service brake activation and stretch brake functions, while the parking brake rotary switch controls parking brake activation and trailer test functions, achieving multi-functionality through universal design.
2Adaptability or versatility
If multiple control functions are integrated into the actuating device, then the functionality and control options increase, but operation becomes less intuitive and more difficult
Solution Approach 1:
By separating control functions into two dedicated rotary switches, each switch presents a simplified interface with fewer functions per switch. This makes operation more intuitive as the driver only needs to interact with one switch for one type of braking function, reducing cognitive load and operational complexity.
Solution Approach 2:
Each rotary switch is assigned to control a specific braking system (service brake or parking brake), creating localized control zones. This local quality assignment makes operation more intuitive by allowing the driver to focus on one braking system at a time, with each switch having dedicated switching states for its assigned functions.
3Device complexity
If a single actuating device controls multiple functions, then the number of control elements is reduced, but the likelihood of incorrect operation increases
Solution Approach 1:
The control system is divided into two separate rotary switches, each with dedicated switching states for specific braking functions. This segmentation reduces the likelihood of incorrect operation by preventing accidental activation of wrong functions, as each switch is mechanically or electrically configured to only activate its assigned braking system.
Solution Approach 2:
The rotary switches incorporate visual feedback mechanisms such as illuminated switching states or position indicators that clearly show the current operational state to the driver. This feedback ensures the driver can verify correct operation before and during actuation, significantly reducing the likelihood of incorrect operation.
Data Source
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AI summary
The present invention relates to a rotary switch (10, 110, 210, 310) for controlling an electronic parking brake device (12, 112, 212, 312) of a utility vehicle, having a rotating knob (14, 114, 214, 314) and a rotating knob counter piece (16, 116, 216, 316), wherein the rotating knob (14, 114, 214, 314) and the rotating knob counter piece (16, 116, 216, 316) are rotatably connected to each other and can be rotated relative to each other about a common axis of rotation (D, 1D, 2D, 3D), and wherein the rotating knob (14, 114, 214, 314) can also be axially displaced along the common axis of rotation (D, 1D, 2D, 3D) relative to the rotating knob counter piece (16, 116, 216, 316), wherein the rotary switch (10, 110, 210, 310) has at least one actuation switching state (S2P, 1S2P, 2S2P, 3S2P) and at least one release switching state (S2D, 1S2D, 2S2D, 3S2D), wherein the actuation switching state (S2P, 1S2P, 2S2P, 3S2P) results from a first rotary movement of the rotating knob (14, 114, 214, 314) in a first rotational direction (DR1, 1DR1, 2DR1, 3DR1) and/or from a first axial displacement movement of the rotating knob (14, 114, 214, 314) in a first displacement direction (VR1, 1VR1, 2VR1, 3VR1) and wherein the release switching state (S2D, 1S2D, 2S2D, 3S2D) results from a second rotary movement of the rotating knob (14, 114, 214, 314) in a second rotational direction (DR2, 1DR2, 2DR2, 3DR2) and/or from a second axial displacement movement of the rotating knob (14, 114, 214, 314) in the first displacement direction (VR1, 1VR1, 2VR1, 3VR1).