Cable Sealing with Bonding Intermediary Member
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic apparatuses face challenges in maintaining environmental resistance due to insufficient bonding forces between cables and sealing parts, particularly in harsh environments with temperature changes and exposure to liquids like oil or water, leading to separation and potential damage.
Innovation Solution
The electronic apparatus employs a bonding intermediating member with a bending elastic modulus of 80 MPa to 210 MPa, formed from a resin such as fluorine-based materials, and a cable with a suspending flattening ratio of 0.30 to 0.71, combined with an epoxy resin sealing part, to enhance durability and bonding forces, preventing separation and infiltration of liquids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a cable is held by an elastically deformable clamp that fits into an opening provided in a case, then stress exerted on the cable is alleviated, but bonding force between the cable and sealing part becomes insufficient leading to separation
Solution Approach 1:
The patent introduces a bonding intermediating member as a mediator between the cable and the sealing part. This intermediating member has a bonding face that bonds to the cable and another bonding face that bonds to the sealing part, thereby improving the bonding force and preventing separation while maintaining the stress-alleviating function of the clamp.
Solution Approach 2:
The bonding intermediating member is formed of a resin with specific mechanical properties (bending elastic modulus of 80 MPa to 210 MPa) that differ from both the cable and the sealing part. This composite material approach allows optimization of bonding characteristics while maintaining flexibility and durability in harsh environments.
2Strength
If structural reinforcement is applied to bonding faces to improve bonding force, then bonding force increases, but in harsh environments with temperature changes and oil exposure, separation still occurs due to insufficient durability
Solution Approach 1:
The patent specifies precise parameter ranges for the bonding intermediating member: bending elastic modulus of 80 MPa to 210 MPa and suspending flattening ratio of 0.30 to 0.71. These parameter optimizations ensure the member has sufficient flexibility to accommodate thermal expansion and contraction while maintaining adequate bonding strength, preventing separation in harsh environments with temperature changes and oil exposure.
Solution Approach 2:
The bonding intermediating member has different functional regions: a first bonding face optimized for bonding to the cable and a second bonding face optimized for bonding to the sealing part. This local quality differentiation allows each bonding interface to be optimized for its specific requirements while the overall member maintains durability through its controlled mechanical properties.
3Reliability
If a bonding intermediating member with specific resin properties is used, then bonding force and durability are improved, but device complexity increases
Solution Approach 1:
The bonding intermediating member serves multiple functions simultaneously: it provides bonding between the cable and sealing part, accommodates thermal expansion and contraction through its elastic properties, and protects the bonding interfaces in harsh environments. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity.
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 excellent environmental resistance by maintaining strong bonding forces between the sealing part, cable, and intermediating member, effectively preventing separation and liquid infiltration, thus protecting the electronic components.
Implementation Method 1
a bonding intermediating member that is joined to the cable... formed of a resin having a bending elastic modulus in the range of 80 MPa to 210 MPa
Data Source
AI summary
An electronic apparatus includes a case, a cable drawn out from the case, a bonding intermediating member, a cylindrical clamp holding the cable, and a sealing part filling an internal space defined by the case and the clamp. The cable has a core wire and a sheath covering the core wire, and the core wire is exposed at an end of the cable without being covered by the sheath. The bonding intermediating member is bonded to the sheath and the sealing part. The sealing part is formed of an epoxy resin, the bonding intermediating part is formed of a resin having a bending elastic modulus in the range of 80 MPa to 210 MPa, and the cable is formed of a material having a suspending flattening ratio in the range of 0.30 to 0.71.