Portable Terminal Axial Locking Mechanism for Impact-Resistant Battery Retention

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Solution Overview

Problem

Existing portable terminals face issues with battery stability and secure engagement, as the spring-based mechanism for preventing battery ejection can lead to poor contact and accidental disengagement during falls or impacts, and the small sliding catch provides insufficient stability.

Innovation Solution

A portable terminal design featuring a main machine body and battery with a pushing button and compression spring for axial engagement, combined with a locking cover and torsion spring to ensure double axial engagement, preventing the battery from exiting even under impact, and allowing easy assembly and disassembly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a spring-based mechanism is used to prevent battery ejection, then the battery can be easily assembled and disassembled, but the battery contact becomes poor and the mechanism fails under impact

Engineering Contradiction:

Improveassembly and disassembly easeVSAvoidbattery contact stability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The locking mechanism is divided into two independent functional components: a pushing button assembly for axial engagement and a locking cover assembly for rotational locking. This segmentation allows each component to specialize in its function - the pushing button handles easy assembly/disassembly while the locking cover provides impact resistance and stable contact.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The locking cover is designed to rotate about the spring axis, transitioning between locked and unlocked positions. This dynamic rotational movement allows the mechanism to maintain reliability under impact while preserving ease of operation during normal assembly and disassembly.

Inventive Principle:

Principle #15Dynamics

2Device complexity

If a small sliding catch is used for engagement, then the device structure is simple, but the stability is insufficient

Engineering Contradiction:

Improveengagement structure simplicityVSAvoidbattery fixation stability

Core Design Contradiction:

Device complexityVSStability of the object's composition

Solution Approach 1:

The locking mechanism transitions from simple linear sliding in one dimension to a two-dimensional solution combining axial movement of the pushing button with rotational movement of the locking cover. This adds a rotational dimension to the engagement process, significantly improving stability while maintaining reasonable structural simplicity.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Device complexity

If only a pushing button and compression spring are used, then the structure is simple, but the battery may exit during falls or impacts

Engineering Contradiction:

Improvelocking mechanism simplicityVSAvoidbattery retention under impact

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The locking cover integrates multiple functions: it provides rotational locking to prevent battery exit during impact, maintains compression spring engagement, and offers a user interface for locking/unlocking. This merging of functions improves reliability without proportionally increasing complexity.

Inventive Principle:

Principle #5Merging (Combining)

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

The design provides reliable fixation of the battery within the main machine body, preventing ejection during drops or impacts while allowing for easy assembly and disassembly, ensuring stable operation and durability.

Implementation Method 1

a spring provided between the pushing button 24 and a bottom portion of the groove. When the spring is not pressed, the protrusion of the pushing button 24 is located above the opening of the groove

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

A torsion spring is provided between the locking cover and the pushing button, such that the locking cover and the pushing button rotate about the axis of the spring body of the torsion spring

Methodology Applied

Scientific EffectTorsion spring: Torsion Spring

Data Source

PatentUS9357664B2Portable terminal

Publication Date: 2016.05.31 HYTERA COMM CORP

AI summary

A portable terminal has a main machine body and a cell, one of the main machine body and the cell is arranged a pushing button moving axially, and a compression spring is arranged between the pushing button and the one of the main machine body and the cell, the other has a clamp slot of which a notch extends axially, and the main machine body and the cell is clamped at the axial direction by the pushing button and the clamp slot. The portable terminal also comprises a lock cover connected with the pushing button, and a torsional spring is arranged between the lock cover and the pushing button, so that the lock cover and the pushing button can rotate along the spring-body axis of the torsional spring; when the torsional spring is reset, vertical distance between one end of the lock cover and the cell or the body arranged the compression spring is smaller than the distance that the pushing button inserts into the clamp slot. The lock cover in the present invention can achieve double-clamping at the axial direction for the cell and the main machine body. The pushing button can tightly lock the cell and the main machine body even if the portable terminal is dropped down or impacted. The cell can be taken from the main machine body only by adding certain torque to the torsional spring while in the assembling or disassembling operation, operation is simple and convenient.