Sliding Positioning Fixture for Screw Hole Blocking
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Solution Overview
Problem
The existing methods for installing functional modules on circuit boards often result in incorrect installations due to differences in specifications and dimensions, leading to potential damage from forced screwing, as thick pads can deform and fail to prevent structural interference.
Innovation Solution
A positioning fixture comprising a shielding member with a sliding part, guiding part, and shielding part, along with a driving member, which blocks the screw hole when an incorrect installation is detected, preventing the screw from locking, thus improving installation accuracy and preventing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a thick pad is disposed on the bottom surface of the functional module to prevent incorrect installation, then the distance between screw holes increases to prevent locking, but the thick pad may be squeezed and deformed, and forced screwing may still lock the functional module causing damage
Solution Approach 1:
The patent introduces a positioning fixture as an intermediary mechanism between the functional module and circuit board. This fixture includes a positioning member with a positioning groove and a limiting member that physically blocks the screw hole when mismatch occurs, serving as a mediator that prevents both incorrect installation and forced screwing damage without requiring deformation of the functional module itself
Solution Approach 2:
The positioning fixture creates a mechanical interlock system where the positioning groove and limiting member work together at the same structural level. The limiting member extends into the screw hole to create an equipotential blocking effect that prevents screw insertion from both correct and incorrect orientations, eliminating the need for asymmetric thick pads that cause deformation
2Reliability
If the thick pad is used to increase distance between screw holes, then incorrect installation is prevented, but the pad may be deformed and installation accuracy is reduced
Solution Approach 1:
The positioning fixture acts as a precise intermediary positioning mechanism that maintains accurate alignment between screw holes. The positioning groove provides precise geometric constraints for the positioning protrusion, ensuring high installation accuracy while the limiting member prevents incorrect installation, eliminating the need for imprecise thick pad adjustments
3Manufacturing precision
If a positioning fixture is integrated on the functional module to block screw holes, then installation accuracy is improved and damage is prevented, but device complexity increases
Solution Approach 1:
The patent merges the positioning fixture with the functional module by integrating the positioning member and limiting member as part of the module's structure. The positioning groove is formed on the functional module itself, and the limiting member is positioned within the module's housing, combining multiple functions into a unified structure that reduces overall system complexity
Solution Approach 2:
The positioning fixture serves multiple functions: it provides positioning guidance through the positioning groove, prevents incorrect installation through the limiting member, and maintains structural integrity of the functional module. This multi-functionality reduces the need for separate components, thereby managing device complexity while achieving high installation accuracy
Data Source
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AI summary
A positioning fixture (100) including a shielding member (110) and a driving member (120) is provided. The shielding member (110) includes a sliding part (111) connected to a functional module (10), a guiding part (112), and a shielding part (113). The driving member (120) is disposed on the functional module (10). The driving member (120) includes a base part (121), a driving part (122) that contacts the guiding part (112), and a pillar part (123), which protrudes from the base part (121) and passes through the guiding groove (114). When the functional module (10) is positioned on the circuit board (20), the base part (121) of the driving member (120) is pushed by the electronic component (30), and the guiding part (112) is pushed by the driving part (122), so that the shielding member (110) slides and the shielding part (113) shields a screw hole of the circuit board (20).