Laser Pen Base Locking Structure to Prevent Loosening

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Solution Overview

Problem

Existing laser pens suffer from easy loosening and separation between the base and the tube body, resulting in easy falling-off of internal elements due to threaded connections, which compromises connection stability and assembly convenience.

Innovation Solution

A laser pen design featuring a tube body with through grooves and a base with protrusion portions that interlock via a bending mechanism, eliminating threaded connections to prevent loosening and separation, enhancing stability and simplifying assembly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If threaded connection is used between base and tube body, then assembly is simple, but connection stability deteriorates due to easy loosening and separation

Engineering Contradiction:

Improveassembly simplicityVSAvoidconnection stability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The through groove is designed with a bending portion that allows dynamic adjustment during assembly. The groove bends to accommodate the protrusion portion, creating a flexible insertion process that simplifies assembly while the final clamped position provides stable connection.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The protrusion portion is nested within the bending portion of the through groove, creating a nested structure where the base's protrusion fits inside the tube body's groove. This nesting arrangement prevents loosening while maintaining simple assembly through straightforward insertion.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Ease of operation

If threaded connection is used between base and tube body, then assembly is convenient, but internal elements fall off easily due to loosening

Engineering Contradiction:

Improveassembly convenienceVSAvoidinternal element retention

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

The bending portion of the through groove is pre-formed to anticipate and counteract loosening forces. When the protrusion portion is inserted, the bending portion clamps down on it, creating a preliminary anti-action that prevents any subsequent loosening and keeps internal elements securely retained.

Inventive Principle:

Principle #9Preliminary anti-action

3Reliability

If clamped connection via bending portion is used, then connection stability improves, but manufacturing complexity increases

Engineering Contradiction:

Improveconnection stabilityVSAvoidmanufacturing simplicity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The bending portion introduces a curved geometric feature in the otherwise linear through groove. This curvature is achieved through standard bending processes in metal fabrication, adding minimal manufacturing complexity while providing the clamping action needed for stable connection.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Data Source

PatentUS20260003203A1Laser pen

Publication Date: 2026.01.01 NINGBO XINHE HLDG

AI summary

The present application provides a laser pen and relates to the technical field of laser pens. The laser pen includes a tube body and a base, where the tube body is of a hollow structure, and the base is connected to a first end of the tube body, to form an accommodating cavity; a laser diode configured to transmit a laser beam is disposed in the accommodating cavity, and the laser diode emits the laser beam from a second end of the tube body; the first end of the tube body is provided with at least one through groove, the through groove is provided with a bending portion, and one end thereof is communicated with the outside; and a side wall of the base is provided with a protrusion portion corresponding to the through groove.