Portable Saw Rotating Head Lock for Multi-Position Cutting
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Solution Overview
Problem
Portable saws with limited angular rotation of the rotating head and inefficient locking mechanisms face challenges in providing ergonomic and durable performance, especially when used in hard-to-reach locations, leading to reduced usability and product quality.
Innovation Solution
A portable saw design featuring a head portion with grooves for enhanced angular rotation (up to 180 degrees) and a simple locking mechanism using a slider element and spring for easy, single-handed operation, combined with a robust coupling mechanism including a central pin for stability and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rotating head mechanism is used to provide multiple working positions, then the versatility and ease of operation are improved, but the device complexity and locking mechanism reliability worsen
Solution Approach 1:
The locking mechanism is segmented into discrete components: a locking pin with multiple positioning holes, a spring element, and a release button. This segmentation allows each component to perform a specific function independently, simplifying the overall mechanism while maintaining multiple locking positions for the head portion.
Solution Approach 2:
The spring element automatically returns the locking pin to its locked position after being pushed by the release button. This self-service mechanism eliminates the need for complex manual repositioning or additional actuating mechanisms, reducing device complexity while maintaining reliable locking across multiple positions.
2Reliability
If a complex locking mechanism is used to secure the rotating head, then the stability and reliability are improved, but the ease of operation and device complexity worsen
Solution Approach 1:
The release button acts as an intermediary element that the user interacts with to trigger the locking mechanism's release. When pressed, it compresses the spring element, which in turn moves the locking pin to disengage from the positioning holes. This intermediary approach allows simple single-handed operation while maintaining reliable multi-position locking stability.
3Ease of manufacture
If the head portion is fixedly coupled to the handle, then the structural simplicity and manufacturing ease are improved, but the adaptability and ease of operation in difficult locations worsen
Solution Approach 1:
The coupling mechanism transitions from a fixed connection to a dynamic, rotatable connection. The head portion can rotate angularly relative to the handle portion within a range of approximately 120 degrees, allowing adaptation to various cutting angles and difficult-to-reach locations while maintaining a relatively simple overall structure.
Data Source
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AI summary
A portable saw (100) includes a head portion (102). The head portion (102) includes a first groove (202) and a second groove (204). The head portion (102) also includes a blade (104) coupled to the head portion (102). The portable saw (100) also includes a handle portion (110) rotatably coupled to the head portion (102). The portable saw (100) further includes a locking mechanism (114) provided in association with each of the handle portion (110) and the head portion (102). The locking mechanism (114) is adapted to selectively slidably engage at least one of the first groove (202) and the second groove (204) provided in the head portion (102) to lock the head portion (102) with respect to the handle portion (110) in the first position and the second position respectively.