Vehicle Mirror Angle Detection Without Spring Bias
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Solution Overview
Problem
Conventional vehicle mirror apparatuses with mirror surface angle detection devices using a male thread member and a nut member require a spring to bias the mover for accurate angle detection, limiting the design's flexibility and efficiency.
Innovation Solution
The solution involves a mover connected to the nut member via a ball joint, allowing it to move along the male thread member without rotating relative to the male thread member, eliminating the need for a spring bias and enhancing the detection mechanism's reliability and precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a spring is used to bias the mover for accurate angle detection, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The invention extracts and eliminates the spring component from the detection device. By using a mover that can rotate relative to the nut member but is prevented from rotating relative to the male thread member, the spring biasing mechanism is completely removed while maintaining accurate angle detection capability.
Solution Approach 2:
The invention replaces the mechanical spring biasing system with a rotational constraint mechanism. The mover's rotation relative to the nut member is allowed, but rotation relative to the male thread member is prevented through structural design, substituting the spring's axial biasing function with a rotational prevention mechanism.
2Reliability
If a spring is used to bias the mover, then reliability is improved, but ease of manufacture deteriorates
Solution Approach 1:
The spring component is extracted from the assembly, eliminating the need for spring installation, adjustment, and maintenance. The mover is directly connected to the nut member via a ball joint, and its rotational prevention relative to the male thread member is achieved through the connection structure itself, simplifying manufacturing and assembly.
Solution Approach 2:
The mover structure itself provides the rotational prevention function through its connection to the male thread member, without requiring external spring components. The ball joint connection between the mover and nut member automatically allows the necessary rotation while the connection to the male thread member prevents unwanted rotation, making the system self-regulating.
3Measurement precision
If the mover is prevented from rotating relative to the male thread member, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The invention merges the rotational prevention function into the existing connection structure between the mover and the male thread member. The same connection that allows axial movement of the mover along the male thread member also inherently prevents rotation, combining multiple functions into a single structural arrangement rather than adding separate constraint mechanisms.
Solution Approach 2:
The connection structure between the mover and the male thread member serves multiple functions: it allows axial movement for angle detection, prevents rotation for measurement accuracy, and provides structural support. This multi-functional design eliminates the need for separate components for each function, reducing overall device complexity.
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
This design enables precise mirror surface angle detection without the use of a spring, improving the apparatus's operational efficiency and flexibility, allowing for more robust and reliable angle adjustments.
Implementation Method 1
the mover having a front end connected to the nut member at a position in a back of a front end of the nut member so as to be rotatable relative to the nut member around an axis of the nut member
Data Source
AI summary
Moving a mover for mirror surface angle detection following a nut member along a male thread member in such a manner that the mover is rotatable relative to the nut member and is non-rotatable relative to the male thread member, without biasing the mover by means of a spring. A communication hole is provided in a male thread member along a shaft axis of the male thread member. A mover is inserted through the communication hole so as to be movable in an axial direction. A front end of the mover is connected to a position in a back of a front end of a nut member so as to be rotatable relative to the nut member around the axis of the nut member. A position detection device detects a position of the mover relative to a base member in a direction along the male thread member.