Shield Shell Attachment Structure for Compact Connector Housing
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Solution Overview
Problem
Existing shield shell attachment structures face challenges in achieving uniform contact pressure across the entire shield shell while maintaining a compact size, as they often require increased thickness and tilting of the shield shell due to the orientation of fixation pieces and screw holes, which can lead to interference with the connector housing.
Innovation Solution
The proposed shield shell attachment structure incorporates a first attachment piece in contact with the attached portion's surface and a second attachment piece projecting from the first attachment piece, which is fastened with a fastening member to exert an elastic restoring force, ensuring contact pressure from the entire shield shell without altering its posture, thus allowing for size reduction without interference with the connector housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If fixation pieces are tilted toward the center of the shield shell to achieve contact pressure, then contact pressure on the attached portion is improved, but the shield shell thickness must be increased which causes interference with the connector housing
Solution Approach 1:
The patent changes the attachment geometry from a tilted configuration (requiring thickness in the radial direction) to a planar configuration where the attachment piece extends in the axial direction perpendicular to the attached portion surface. This dimensional change allows the attachment piece to achieve contact pressure without increasing the shield shell thickness in the radial direction, thus avoiding interference with the connector housing.
Solution Approach 2:
The patent divides the shield shell into a main body and a separate attachment piece. The attachment piece is a distinct component that can be optimized independently for attachment functionality, while the main shield shell body maintains its original thickness requirements for housing the connector. This segmentation allows the attachment function to be achieved without compromising the compact size of the main shield shell.
2Strength
If screw holes are provided in the attached portion for perpendicular screw insertion, then secure fastening is achieved, but the attached portion thickness must be greater than screw diameters which increases overall size
Solution Approach 1:
The patent changes the fastening approach from perpendicular screw insertion (requiring thickness in the radial direction) to axial fastening where the fastening member inserts through the attachment piece in the axial direction. This dimensional change allows secure fastening to be achieved without increasing the attached portion thickness in the radial direction, maintaining a compact overall size.
3Stress or pressure
If the shield shell is tightened with increased forces to secure contact pressure, then contact pressure is improved, but the shield shell posture tilts which causes interference with the connector housing
Solution Approach 1:
The patent changes the attachment geometry so that the attachment piece and fastening member are arranged in the axial direction perpendicular to the attached portion surface, rather than tilted toward the center. This dimensional change creates a symmetric load distribution that prevents tilting of the shield shell posture, while still achieving sufficient contact pressure through the elastic deformation of the attachment piece.
4Volume of moving object
If the shield shell size is reduced for compactness, then device size is improved, but sufficient contact pressure across the entire shield shell becomes difficult to achieve
Solution Approach 1:
The patent employs an elastic attachment piece that can be made thin and flexible, allowing it to conform to the attached portion surface and distribute contact pressure evenly across the entire shield shell. The elastic properties enable sufficient contact pressure to be achieved with a compact shield shell size, as the attachment piece deforms elastically to maintain uniform pressure distribution without requiring a large overall structure.
Solution Approach 2:
By separating the attachment function into a dedicated elastic attachment piece, the patent enables the main shield shell to be minimized for compactness while the attachment piece provides the necessary contact pressure. The attachment piece acts as a compliant element that ensures uniform pressure distribution across the shield shell surface without increasing the main body size.
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 configuration ensures secure contact pressure across the entire shield shell while maintaining a compact size, preventing interference with the connector housing and facilitating easy attachment by maintaining the shield shell's posture regardless of tightening forces.
Implementation Method 1
the elastic piece 225 configured to be elastically deformed when contacting the attached portion 270
Implementation Method 2
a second attachment piece projecting from an end portion of the first attachment piece to an opposite side to the first attached surface and being in contact with a second attached surface of the attached portion, and wherein the second attachment piece is fastened to the second attached surface with the fastening member so that the second attachment piece is in elastic contact with the second attached surface with an elastic restoring force bringing an attachment surface of the first attachment piece into pressure contact with the first attached surface
Data Source
AI summary
A shield shell (21) covering a connector housing (11) includes a first attachment piece (23) in contact with a first attached surface (71) of an attached portion (70) having a hole (71a) for the connector housing (11), and a second attachment piece (25) projecting from an end portion (24) of the first attachment piece (23) to an opposite side to the first attached surface (71) and being in contact with a second attached surface (72) of the attached portion (70). The second attachment piece (25) is fastened to the second attached surface (72) so that the second attachment piece (25) is in elastic contact with the second attached surface (72) with an elastic restoring force bringing the first attachment piece (23) into pressure contact with the first attached surface (71).