Nut Member Protrusion for View Angle Adjustment Durability
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Solution Overview
Problem
Conventional view angle adjustment mechanisms for mirror devices suffer from nut member deformation and breakage due to coming-off prevention measures, which complicate assembly and reduce durability.
Innovation Solution
A view angle adjustment mechanism that incorporates a tilting actuator with a nut member featuring a gear member and protrusions, where the protrusions are designed to prevent the nut from coming off by abutting with a protrusion abutment portion, enhancing durability and simplifying the structure by combining the rotation and coming-off prevention functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coming-off prevention element is formed at each leg of the nut member, then the nut member can be prevented from coming off, but the legs are subjected to external forces causing deformation and breakage
Solution Approach 1:
The patent separates the coming-off prevention function from the legs by introducing a dedicated protrusion structure on the nut member body that engages with a corresponding abutment portion on the male thread member. This segmentation allows the legs to focus solely on their threadable connection function without bearing the additional stress of preventing the nut from coming off, thereby resolving the contradiction between coming-off prevention and leg durability
Solution Approach 2:
The protrusion and abutment portion act as an intermediary mechanism between the nut member and male thread member to prevent coming off. Instead of relying on the legs to prevent coming off directly, this intermediary structure transfers the prevention function to a dedicated component that is better suited to handle the external forces, thus protecting the legs from deformation and breakage
2Reliability
If separate structure parts are provided for rotation and coming-off prevention functions, then each function can be optimized, but the nut member structure becomes complex
Solution Approach 1:
The patent merges the rotation function and coming-off prevention function into a single integrated protrusion structure on the nut member. The protrusion engages with the gear member to enable rotation while simultaneously engaging with the abutment portion on the male thread member to prevent coming off. This merging eliminates the need for separate structure parts, thereby simplifying the nut member structure while maintaining both functions
Solution Approach 2:
The protrusion structure on the nut member is designed to perform multiple functions: it engages with the gear member for rotation and engages with the abutment portion for coming-off prevention. This multi-functionality allows a single structure part to fulfill both rotational and prevention roles, reducing overall structural complexity while optimizing both functions
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 mechanism enhances the durability of the nut member's legs against deformation and breakage, maintaining the range of view angle adjustment while simplifying the structure and preventing forced pressing on the legs.
Implementation Method 1
the gear member is driven by the motor to rotate in the direction of rotation around the axis of the male thread member
Implementation Method 2
the nut member is threadably connected to the male thread member and is capable of moving in an axial direction of the male thread member upon being rotated
Data Source
AI summary
This invention relates to a view angle adjustment mechanism. A view element tilting section is tiltably supported by the tilting support section. Upon a motor being driven, a nut member rotates together with a gear member, the nut member rises/falls along a male thread member, whereby the view element tilting section is tilted. At a barrel of the nut member, a protrusion is formed. The protrusion is fitted in a groove of the gear member and causes the nut member to rotate together with the gear member. At the tilting support section, a protrusion abutment portion is formed. When the nut member moves in a direction in which the nut member comes off from the male thread member, the protrusion abutment portion abuts on the protrusion and thereby prevents movement of the nut member.