Interchangeable Tool Head Locking for Quick Secure Replacement

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing hand tools with interchangeable heads require additional tools for head replacement, leading to complexity, inefficiency, and insecure locking mechanisms, limiting their versatility.

Innovation Solution

A tool design with a detachable tool head and a joining mechanism that allows quick and easy head replacement using a slider and latch system, featuring offset and upturned angles, reinforcing portions, and ribs for enhanced structural strength.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a traditional fastening mechanism with multiple components is used, then the locking security is improved, but the device complexity increases and head replacement becomes cumbersome

Engineering Contradiction:
Improvelocking securityVSAvoidfastening mechanism complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The fastening mechanism is segmented into distinct functional components: a latch member with a latch portion for engagement, a slider for movement control, and an elastic member for providing locking force. This segmentation allows each component to perform its specific function efficiently while maintaining overall simplicity

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The elastic member automatically provides the necessary locking force to engage the latch portion with the detent groove without requiring additional tools or manual intervention. The mechanism self-regulates through the elastic force, eliminating the need for complex fastening procedures

Inventive Principle:
Principle #25Self-service

2Reliability

If a traditional fastening mechanism with multiple components is used, then the locking security is improved, but the ease of operation deteriorates due to cumbersome head replacement

Engineering Contradiction:
Improvelocking securityVSAvoidhead replacement convenience
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The slider is designed to move dynamically between locked and released positions, allowing the latch portion to engage or disengage from the detent groove as needed. This dynamic movement enables quick head replacement while maintaining secure locking when engaged

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The elastic member automatically provides the necessary locking force to engage the latch portion with the detent groove without requiring additional tools or manual intervention. The mechanism self-regulates through the elastic force, eliminating the need for complex fastening procedures

Inventive Principle:
Principle #25Self-service

3Ease of operation

If a simple joining mechanism is used, then the ease of operation is improved, but the reliability of the locking mechanism deteriorates

Engineering Contradiction:
Improvehead replacement convenienceVSAvoidlocking security
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The fastening mechanism is segmented into distinct functional components: a latch member with a latch portion for engagement, a slider for movement control, and an elastic member for providing locking force. This segmentation allows each component to perform its specific function efficiently while maintaining overall simplicity

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The slider is designed to move dynamically between locked and released positions, allowing the latch portion to engage or disengage from the detent groove as needed. This dynamic movement enables quick head replacement while maintaining secure locking when engaged

Inventive Principle:
Principle #15Dynamics

4Strength

If the tool head is designed with offset angles and reinforcing portions, then the structural strength is improved, but the manufacturing complexity increases

Engineering Contradiction:
Improvetool head structural strengthVSAvoidtool head manufacturing complexity
Core Design Contradiction:
StrengthVSEase of manufacture

Solution Approach 1:

Reinforcing portions are strategically placed only at critical stress points within the tool head structure, such as the connection area between the handle and tool head. This localized reinforcement provides necessary strength while minimizing additional manufacturing complexity compared to uniform thickening

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The tool head incorporates offset angles and asymmetric reinforcing portions positioned according to specific stress distribution patterns. These asymmetric features are designed to match the actual load paths and force vectors experienced during tool operation, providing optimal strength-to-complexity ratio

Inventive Principle:
Principle #4Asymmetry

Data Source

PatentUS20260070770A1Tool with interchangeable head
Publication Date: 2026.03.12 HONG ANN TOOL INDS
  • US20260070770A1 patent drawing
  • US20260070770A1 patent drawing
  • US20260070770A1 patent drawing

AI summary

A tool with an interchangeable head includes a handle, a tool head, and a joining mechanism. The tool head is detachably connected to the handle and has a body extending along a first axis and an abutting portion extending along a second axis. The first axis and the second axis intersect to form an offset angle ranging from 30 degrees to 105 degrees. The joining mechanism is disposed between the handle and the tool head and is configured to selectively permit or restrict the tool head from being detached from the handle.