Terminal Block Wire Insertion With Spring Lock Feedback
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Solution Overview
Problem
In push-in connection type terminal blocks, electric wires face difficulty in smooth insertion due to the urging force of the leaf spring, and the lack of a clear feeling or visual indication of the inserted state makes it challenging to confirm the connection.
Innovation Solution
A terminal block configuration featuring a housing with a movable member, leaf spring, and locking mechanism, where the electric wire is inserted while pushing a block part against an urging force, releasing the locking claw and allowing the leaf spring to fix the wire, with a display part visible through a window indicating the connection state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the leaf spring applies urging force to fix the electric wire, then the wire is securely fixed, but the electric wire cannot be inserted smoothly
Solution Approach 1:
The locking member is configured to automatically release the locked state when the electric wire is inserted, before the fixing action occurs. This preliminary release action removes the resistance from the leaf spring, allowing smooth insertion. After insertion, the locking member returns to locked state to maintain the fixing force.
2Productivity
If the locking mechanism suddenly releases to fix the wire, then the wire is fixed quickly, but the user cannot grasp the feeling and sense of the inserted state
Solution Approach 1:
A display member is provided that visually indicates the insertion state of the electric wire. When the wire is inserted and the locking member releases, the display member changes its visible state through the window portion, providing feedback to the user. This allows the user to grasp the inserted state without compromising the quick fixing action.
3Device complexity
If no display mechanism is provided, then the structure is simple, but the user cannot easily confirm the connection state
Solution Approach 1:
The display member utilizes visual changes (such as color changes or positional changes visible through the window portion) to indicate the connection state. When the electric wire is inserted and fixed, the display member transitions to a visible state that confirms the connection, providing clear information feedback without requiring complex display mechanisms.
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
Facilitates easy insertion and visual confirmation of the electric wire's fixed state, reducing the need for strong force during connection and ensuring secure locking without sudden release.
Implementation Method 1
an urging part, wherein the urging part applies an urging force to the block part in a direction substantially opposite to an insertion direction of the electric wire
Implementation Method 2
a contact part moving in conjunction with the claw part. When the electric wire is inserted into the housing through the insertion part, an end of the electric wire pushes the block part, and the contact part is further pushed via the block part, whereby locking by the claw part is released
Implementation Method 3
A visible state of the display part through the window part changes due to a change in a position of the display part moving in conjunction with the block part
Data Source
AI summary
The present invention facilitates making electrical connections. In this terminal block, when an electric wire is inserted in a housing, the end of the electric wire pushes in a block part of a movable member, and a contact part of a locking member with the block part interposed therebetween, thereby releasing the locking of a leaf spring moving part by a hook part of the locking member, and the electric wire is secured by the leaf spring moving part, and the degree to which a display part of the movable member moving in conjunction with the block part is visible through a window part changes according to the change in position of the display part.