Solenoid Valve Terminal Cover Locking Stopper Design

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Solution Overview

Problem

Existing solenoid valve assemblies with printed circuit boards require modifications to eliminate the board for cost-effective production, but this poses safety risks due to potential unexpected disconnection of power feeding terminals.

Innovation Solution

A solenoid valve assembly design with socket housings and a terminal cover that locks a power feeding terminal box, preventing disconnection and ensuring secure power feeding by integrating pin-shaped power feeding terminals with socket-shaped relay terminals.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the printed circuit board is omitted from the solenoid valve assembly, then manufacturing cost is reduced and volume production becomes more cost-effective, but the power feeding terminal may be unexpectedly disconnected from the relay terminal, creating safety risks

Engineering Contradiction:
Improvemanufacturing costVSAvoidconnection reliability
Core Design Contradiction:
Ease of manufactureVSReliability

Solution Approach 1:

The power feeding terminal is segmented into two distinct connection points: the relay terminal on the solenoid valve body and the power feeding terminal on the feeding line. This segmentation allows independent optimization of each connection point while maintaining overall system reliability without requiring a printed circuit board to bridge them.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

A socket housing acts as an intermediary structure that receives and secures both the relay terminal and power feeding terminal. This intermediary component provides a stable mounting environment that ensures reliable electrical connection between the terminals without requiring additional control electronics.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Ease of operation

If the power feeding terminal is made accessible for easy connection, then ease of operation is improved, but the risk of unexpected disconnection and safety hazards increases

Engineering Contradiction:
Improveconnection easeVSAvoidconnection stability
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The socket housing is pre-configured with receiving spaces and securing structures that automatically engage the power feeding terminal in the correct position. This preliminary preparation ensures that when connection is made, it is both easy to perform and inherently stable, eliminating the need for complex alignment procedures that could lead to improper connection.

Inventive Principle:
Principle #10Preliminary action

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

Enhances safety by ensuring secure and reliable electrical connections, preventing accidental disconnection of power feeding terminals and allowing for the same solenoid valve body to be used without a printed circuit board, thus enabling cost-effective volume production.

Implementation Method 1

a locking stopper formed inside the terminal box housing and extending inwardly for locking the power feeding terminal box... The terminal cover support locks into the locking stopper

Methodology Applied
Scientific EffectMechanical locking: Mechanical Fastener

Implementation Method 2

a solenoid operation section for operating the passage switching section... socket housings which house sockets to be electrically connected with a coil inside the solenoid operation section

Methodology Applied
Scientific EffectElectromagnetic actuation: Electromagnet

Data Source

PatentUS7954786B2Solenoid valve assembly
Publication Date: 2011.06.07 SMC CORP
  • US7954786B2 patent drawing
  • US7954786B2 patent drawing
  • US7954786B2 patent drawing

AI summary

A socket housing formed on the side of a solenoid valve body includes a socket thereinside connected with a coil of a solenoid operation section. A power feeding terminal box for holding a pin-shaped power feeding terminal connected with a power feeding line is housed in a terminal cover. Installation of the terminal cover on the side of the solenoid valve body causes the power feeding terminal to be electrically connected with the socket and at the same time the power feeding terminal box to be locked into a locking stopper formed inside the terminal cover, thereby allowing the terminal cover to be locked and held in place.