Oil Temperature Sensor Cable Groove Segmentation
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Solution Overview
Problem
Existing oil temperature sensors face inefficiencies in holding and connecting cables to terminals due to the difficulty in inserting cables into grooves with bent portions, requiring time and effort for soldering.
Innovation Solution
An oil temperature sensor design featuring a housing assembly with linear grooves that allow easy insertion of cable-attached terminals, including a press-fit rib and positioning recesses to secure the cable, and a joint terminal portion that connects the cable to the terminal portion efficiently, preventing external forces from affecting the soldered connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a groove with a bent portion is formed on the housing to receive the cable, then external forces are prevented from affecting the soldered connection, but inserting the cable into the groove becomes difficult and time-consuming
Solution Approach 1:
The groove is segmented into multiple sections: a first groove portion for receiving the cable, a second groove portion with a bent portion for force absorption, and a third groove portion for securing the cable. This segmentation allows each portion to perform its specific function optimally while maintaining overall system reliability and ease of cable installation
Solution Approach 2:
The groove structure is pre-configured with the bent portion and multiple groove portions before cable installation. The cable is inserted into the pre-formed groove structure, allowing the bent portion to automatically absorb external forces and the securing portion to automatically secure the cable, eliminating the need for complex assembly operations
2Reliability
If the cable is fitted into a groove with a bent portion to protect the soldered portion, then the soldered connection is protected from external forces, but the assembly process requires more time and effort
Solution Approach 1:
The groove is divided into functional segments: a first groove portion for cable reception, a second groove portion with bent structure for force absorption, and a third groove portion for cable securing. This allows simultaneous achievement of protection and ease of assembly
Solution Approach 2:
The bent portion of the groove automatically absorbs external forces applied to the cable, and the securing portion automatically holds the cable in place, eliminating the need for additional protective measures or complex assembly operations, thereby improving productivity
3Ease of operation
If a linear groove is formed in the housing for cable insertion, then cable insertion becomes easier, but additional structures are needed to secure the cable and prevent movement
Solution Approach 1:
The linear groove is segmented into three functional portions: a first groove portion for easy cable insertion, a second groove portion with bent structure for force absorption, and a third groove portion for cable securing. This segmentation provides cable retention functionality within the simple linear groove structure without requiring additional complex components
Solution Approach 2:
The single linear groove structure performs multiple functions: it guides cable insertion, absorbs external forces through its bent portion, and secures the cable in place. This multi-functionality eliminates the need for separate securing structures, maintaining device simplicity while achieving cable retention
Data Source
AI summary
An oil temperature sensor includes a housing assembly in which a lead frame on which a thermistor for detecting a temperature of oil is mounted is integrated with a housing such that a tip-side terminal portion is exposed outward. The housing includes a groove formed linearly into which a cable-attached terminal is inserted. The groove is opened on both sides of the groove in the extending direction and is also opened in one direction crossing the extending direction. A joint terminal portion and a sheath of a cable are partially inserted into the groove.