Jigsaw Single Control Linkage for Speed and Orbital Motion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current jigsaws require separate controls for adjusting reciprocation speed and orbital motion of the cutting blade, necessitating users to individually set and match these values for different materials and tasks, which can be cumbersome and inefficient.
Innovation Solution
A jigsaw design featuring a single control member that simultaneously adjusts both reciprocation speed and orbital motion of the reciprocating shaft, utilizing a linkage mechanism and eccentric gear system to allow users to select pre-defined settings through a single control interface, correlating with specific tasks and materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate controls are used for reciprocation speed and orbital motion, then each parameter can be precisely adjusted independently, but the device complexity and ease of operation deteriorate due to requiring two separate adjustments
Solution Approach 1:
The patent combines two separate control functions (reciprocation speed control and orbital motion control) into a single control member with multiple positions. Each position of the single control member simultaneously sets both the reciprocation speed and the orbital motion magnitude, eliminating the need for two separate controls while maintaining precise parameter matching for different materials and tasks.
Solution Approach 2:
The single control member serves multiple functions: it controls both reciprocation speed and orbital motion magnitude simultaneously. This multi-functional control interface allows users to adjust both parameters with one control element, improving ease of operation while ensuring coordinated parameter settings appropriate for specific cutting applications.
2Adaptability or versatility
If separate controls are used for reciprocation speed and orbital motion, then independent parameter control is maintained, but the productivity and ease of operation worsen due to requiring individual determination and adjustment of both parameters
Solution Approach 1:
The control member is pre-configured with multiple discrete positions, each corresponding to a pre-determined combination of reciprocation speed and orbital motion settings optimized for specific materials and tasks. This preliminary preparation of parameter combinations allows users to quickly select appropriate settings without performing individual parameter adjustments, significantly reducing setup time while maintaining adaptability to different cutting applications.
3Ease of operation
If a single control member controls both reciprocation speed and orbital motion, then ease of operation and productivity improve, but the device complexity increases due to the linkage mechanism and eccentric gear system
Solution Approach 1:
The patent introduces a linkage mechanism and eccentric gear system as intermediary elements that translate the rotational movement of the single control member into coordinated adjustments of both reciprocation speed and orbital motion magnitude. These mechanical intermediaries automatically maintain the correct relationship between the two parameters, simplifying the user interface while managing the inherent complexity through well-defined mechanical transmission paths.
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
This design simplifies the operation by allowing users to select optimal combinations of reciprocation speed and orbital motion with a single control, enhancing usability and efficiency by eliminating the need for separate adjustments, thereby improving user experience and productivity.
Implementation Method 1
an eccentric gear mechanism having an input shaft and an output shaft, the eccentric gear mechanism including a driver gear that is coaxial with the input shaft and a driven gear that is coaxial with the output shaft, the driver gear being in mesh with the driven gear
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A jigsaw (100) generally includes a housing (102) containing a motor (108) activated by a trigger assembly (110). A single control member (118) is connected to the housing (102) and configured to be accessible by a user. A reciprocating shaft (112) moves at a reciprocation speed and at a magnitude of orbital motion when the trigger assembly (110) is in a retracted condition. The single control member (118) is operable to be positioned among a plurality of positions. Each of the positions corresponds to a predetermined combination of values of the reciprocation speed and the magnitude of the orbital motion.