Router Handle With Rotary Lock And Deflection Gear
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hand-held machine tools, such as routers, are uncomfortable and unsafe to hold due to the design of the rotary handle, which can lead to unintentional actuation and loss of control during operation.
Innovation Solution
A handle is fixed on the machine part and designed to be gripped parallel or inclined to the longitudinal direction, with a rotary handle at the end that is easily accessible for thumb operation, connected to a deflection gear for precise control of the locking mechanism, separating the functions of holding and locking and ensuring secure grip without accidental twisting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the handle and rotary handle are formed by a single part, then the device complexity is reduced, but the ease of operation deteriorates and reliability worsens due to unintentional actuation
Solution Approach 1:
The handle is divided into two separate functional components: a fixed handle for holding the machine tool and a rotary handle for actuating the locking mechanism. This segmentation allows the user to grip the fixed handle securely without risk of unintentional actuation, while the separate rotary handle provides dedicated control for locking and loosening operations.
2Device complexity
If the rotary handle is arranged on the end area of the tie rod, then the device complexity is reduced, but reliability worsens due to accidental twisting during movement
Solution Approach 1:
The rotary handle is extracted from the tie rod structure and repositioned to be arranged on the fixed handle. This separation removes the hazard of accidental twisting from the tie rod area, while the rotary handle remains easily accessible on the handle for intentional actuation only.
3Ease of operation
If the handle runs parallel or inclined to the longitudinal direction, then the ease of operation improves for ergonomic gripping, but the device complexity increases due to deflection gear requirements
Solution Approach 1:
A deflection gear acts as an intermediary mechanism between the rotary handle and the tie rod. This intermediary allows the rotary handle to be positioned ergonomically on the handle while still transmitting the actuating force to the tie rod, resolving the conflict between ergonomic positioning and mechanical connectivity.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The tool has a handle (7) fixedly arranged at a machine part (5) and formed by a hand grip (9) that is enclosed by an operator. The hand grip runs parallel or inclined to a columned longitudinal direction (6) such that a rotary handle (14) of a locking device is arranged at a free end of the hand grip. The rotary handle is rotatable around a rotation axis line (15), is in impellent connection with a tie rod (18) by a reverse gear (20) e.g. bevel gear, and rotates the tie rod.