Braided Wire Ground Structure Eliminating Shield Shell
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Solution Overview
Problem
The existing ground structure of braided wires requires a large number of parts and assembly processes, suffers from deteriorated shield capability due to gaps between components, and necessitates additional sealing and bolt fastening, which complicates the assembly and reduces reliability.
Innovation Solution
A ground structure that omits the shield shell by directly connecting the braid to the device case using a ring-shaped elastic seal and locking lances, reducing the number of parts and assembly steps while enhancing shield capability through seam welding and crimping of the braid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a shield shell is used to connect the braid to the device case, then the braid can be grounded, but the number of parts and assembly processes increases
Solution Approach 1:
The invention extracts and removes the shield shell from the grounding structure, directly connecting the braid to the device case through the connector housing. This eliminates the intermediate component while maintaining the grounding function, thereby reducing the number of parts and assembly processes.
Solution Approach 2:
The invention merges the grounding function directly into the connector housing by providing a grounding protrusion that contacts the device case. The braid is crimped to this protrusion, combining the housing, grounding path, and connection structure into an integrated assembly, eliminating the need for a separate shield shell.
2Reliability
If a shield shell is used to connect the braid to the device case, then the braid can be grounded, but the assembly process becomes more complex
Solution Approach 1:
The shield shell is extracted from the assembly process entirely. The grounding function is achieved through the connector housing's grounding protrusion directly contacting the device case, eliminating the need to assemble a shield shell onto the connector and then bolt it to the case.
Solution Approach 2:
The grounding protrusion is pre-formed as an integral part of the connector housing, and the braid is crimped to it during connector assembly. This preliminary preparation of the grounding path eliminates the need for separate grounding assembly steps involving the shield shell.
3Ease of operation
If gaps are formed between the shield shell and connector housing, then assembly is easier, but shield capability deteriorates
Solution Approach 1:
The grounding protrusion is formed as an integral part of the connector housing, merging the housing and grounding elements into a single component. This eliminates gaps between separate parts while maintaining the grounding function, as the braid is crimped directly to the protrusion which is structurally connected to the housing.
4Reliability
If surface seals are added to prevent water and oil entry, then waterproof capability is improved, but the number of parts and assembly processes increases
Solution Approach 1:
The sealing function is merged into the connector housing structure itself through the groove and elastic seal arrangement. The elastic seal is integrated into the groove formed in the housing, creating a built-in sealing mechanism that prevents water and oil entry without requiring separate sealing components or additional assembly steps.
Solution Approach 2:
The elastic seal in the groove automatically provides sealing when the connector is assembled, utilizing the natural elasticity and compression of the seal material. The structure self-regulates to maintain the seal, eliminating the need for additional sealing mechanisms or complex assembly procedures.
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
There is provided a ground structure of a braided wire having reduced the number of parts and the number of assembling processes and having improved a shield capability. A cylindrical part 52 that is made to stand upright from a periphery of an insertion hole 51 toward an outside of a device case 5 is provided to the device case 5. A terminal of a braid 22 is put on an outer side of the cylindrical part 52 of the device case 5 and a shield band 10 is wound on an outer side of the braid 22 put on the outer side of the cylindrical part 52.