Liquid Pressure Control Device Using Deformable Part for Assembly
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Solution Overview
Problem
Conventional liquid pressure control devices incur high manufacturing costs due to the need for processing grooves or providing spherical portions in terminals to prevent connecting members from falling during assembly.
Innovation Solution
A liquid pressure control device design that includes a housing, a case, a circuit board, and a deformable part, where the circuit board is assembled in a state where the terminal is not in contact with the connection conductor, eliminating the need for grooves or spherical portions, and using an elasticity retention mechanism to prevent the connection conductor from falling during assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a groove is processed in the terminal of the sensor portion or a spherical portion is formed in the terminal to prevent the spring from falling, then the connecting member can be prevented from falling during assembly, but manufacturing costs increase
Solution Approach 1:
The patent applies preliminary action by positioning the circuit board in a state where the terminal is not in contact with the connection conductor (spring) during assembly. The spring is preliminarily positioned in the recessed portion of the case, and the circuit board is assembled in this preliminary state, preventing the spring from falling without requiring grooves or spherical portions in the terminal.
Solution Approach 2:
The patent uses the recessed portion in the case as an intermediary structure to hold the connection conductor (spring). The recessed portion acts as a mediator between the spring and the terminal, providing a temporary holding position for the spring during assembly without requiring modifications to the terminal itself.
2Reliability
If grooves or spherical portions are provided in the terminal, then the connecting member is prevented from falling, but device complexity increases
Solution Approach 1:
The patent extracts the falling prevention function from the terminal structure and relocates it to the case structure (recessed portion). By taking out the complexity from the terminal and placing it in the case, the terminal remains simple while still achieving the goal of preventing the connection conductor from falling.
Solution Approach 2:
The recessed portion in the case serves as an intermediary structure that provides falling prevention without requiring complex terminal modifications. This intermediary structure simplifies the terminal design while maintaining reliability.
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 design reduces manufacturing effort and cost by avoiding the need for complex terminal modifications and ensures stable assembly without the risk of the connection conductor falling, while maintaining a stable electrical connection.
Implementation Method 1
a deformable part positioned in a deformed state between the housing and the case in an assembled state... the deformable part enabling the housing and the case to be in a separation state... and the deformable part being deformed when a second load larger than the first load is applied
Data Source
AI summary
A liquid pressure control device includes a deformable part positioned in a deformed state between a housing and a case in an assembled state in which the housing and the case are assembled. When a first load is applied to the deformable part in a non-assembled state in which the case is separated further from the housing in a first direction than in the assembled state, the deformable part can place the housing and the case in a separation state in which a second end portion supported by a bottom wall is separated from a terminal in the first direction. When a second load greater than the first load is applied in the non-assembled state, the deformable part is deformed by the second load and can place the housing and the case in a contact state in which the second end portion and the terminal contact each other.