Pointing Device Fitting Structure with Intermediary Positioning Member
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Solution Overview
Problem
Conventional pointing device fitting structures for notebook PCs require strict dimensional precision and assembly tolerance control, leading to increased costs and potential deviations in the positioning of the pointing stick, which can result in operational issues and a compromised appearance.
Innovation Solution
A pointing device fitting structure that includes a frame with projecting portions and a support member, where the frame is fixed to the support member via these projecting portions, allowing for direct fixation and maintaining the positional relationship without deviation, thus eliminating the need for strict tolerance control and reducing assembly complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If strict dimensional precision and assembly tolerance control are implemented, then the pointing stick positioning precision is improved, but the manufacturing cost increases
Solution Approach 1:
The patent introduces a positioning member as an intermediary component between the frame and support member. This positioning member features a positioning protrusion that fits into a positioning groove, serving as a mediator to establish precise positioning without requiring strict tolerance control of the main structural components. The positioning member absorbs the tolerance accumulation, allowing the frame and support member to be manufactured with relaxed tolerances while still achieving accurate pointing stick positioning.
2Device complexity
If the stick insertion hole is enlarged to reduce tolerance requirements, then the assembly complexity is reduced, but the pointing stick may deviate from the central axis and interfere with housing
Solution Approach 1:
The positioning member acts as a guide and constraint intermediary between the pointing stick and the stick insertion hole. The positioning protrusion and groove ensure that the pointing stick is correctly positioned during assembly, preventing deviation from the central axis. This allows the stick insertion hole to be sufficiently large for easy assembly while the positioning member prevents operational interference and ensures proper alignment.
3Stability of the object's composition
If multiple components and assembly steps are used, then the structural stability is improved, but the assembly tolerance control becomes more difficult
Solution Approach 1:
The positioning member serves as a stable structural intermediary that provides precise positioning between the frame and support member. The positioning protrusion fitting into the positioning groove creates a reliable mechanical constraint that maintains structural stability while being insensitive to variations in manufacturing tolerances of the surrounding components. This allows the assembly to remain stable even with relaxed tolerance control.
Data Source
AI summary
There is provided a pointing device fitting structure. The pointing device fitting structure includes a frame provided with a projecting portion, and a support member to which a pointing stick is attached. The frame is fixed to the support member via the projecting portion.