Jigsaw Baseplate and Lighting Layout for Safer Narrow-Space Cutting
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Solution Overview
Problem
Existing jigsaws face issues with time-consuming blade removal during breaks, bulky structure causing inflexible operation, inability to stand on a workbench, inadequate lighting for clear cutting visibility, and difficulty operating in narrow spaces due to bulky design and misplaced lighting units.
Innovation Solution
A jigsaw design featuring a compact body structure with a baseplate assembly that allows standing, eccentric lighting unit for clear cutting visibility, and ergonomic grips for comfortable handling, along with a clamping device for secure attachment and a speed regulation assembly for easy operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the saw blade is exposed out of the baseplate for cutting operation, then the cutting function is achieved, but the user safety deteriorates due to risk of injury during breaks
Solution Approach 1:
The baseplate is segmented into a main body and a removable cover portion. The cover can be detached to expose the saw blade during cutting operations, then reattached during breaks to cover and protect the blade, eliminating safety hazards while maintaining cutting functionality.
Solution Approach 2:
The cover is pre-positioned on the baseplate to cover the saw blade when the tool is not in use. This preliminary protective action is automatically in place during breaks, preventing user injury without requiring active intervention.
2Object-affected harmful factors
If the saw blade is removed from the main machine when not in use, then user safety is improved, but the operational efficiency deteriorates due to time-consuming blade removal during breaks
Solution Approach 1:
The baseplate is divided into a stationary main body and a removable cover. Only the lightweight cover needs to be detached or repositioned during breaks, rather than removing the entire saw blade from the motor housing, significantly reducing the time and effort required.
Solution Approach 2:
Instead of removing the dangerous saw blade from the machine during breaks, the invention inverts the approach by keeping the blade in place but covering it with a protective cover. This reverses the traditional safety approach while maintaining both safety and efficiency.
3Ease of operation
If the body is configured with arch-shaped bulky structure with grip far from baseplate, then the hand can pass through for holding, but the operational flexibility deteriorates in narrow spaces
Solution Approach 1:
The body is segmented into functional modules: the arch-shaped grip portion for hand comfort, the compact motor housing, and the baseplate assembly. This modular segmentation allows the grip to remain comfortable while the overall footprint is reduced for narrow space operation.
Solution Approach 2:
The grip is positioned in the vertical dimension (arch-shaped allowing hand passage) rather than extending horizontally. This dimensional change maintains ergonomic hand placement while reducing the horizontal footprint, enabling operation in narrow spaces between walls or obstacles.
4Device complexity
If the lighting unit is disposed coaxially with output member, then the structure is simplified, but the cutting visibility deteriorates at some angles
Solution Approach 1:
The lighting unit is positioned asymmetrically relative to the output member, specifically at the rear end of the baseplate rather than coaxially. This asymmetric placement creates optimized lighting angles that illuminate the cutting area from multiple perspectives, improving visibility while the lighting unit itself maintains a relatively simple structure.
Solution Approach 2:
The lighting unit is relocated from the axial dimension (coaxial with output member) to the rear dimension of the baseplate. This dimensional relocation allows light to illuminate the cutting area from a rear angle, providing better visibility of the cutting line and workpiece while maintaining structural simplicity.
5Illumination intensity
If the lighting unit has relatively small dimensions, then clear irradiation is achieved, but the light coverage range deteriorates
Solution Approach 1:
The lighting unit is positioned at the rear end of the baseplate, utilizing the longitudinal dimension of the baseplate to extend light coverage. This rear positioning allows a compact lighting unit to illuminate a larger area by projecting light forward along the cutting path, achieving both clear irradiation and extended coverage range.
Solution Approach 2:
The lighting unit is pre-positioned at the rear of the baseplate to illuminate the cutting area before the cut progresses forward. This preliminary lighting action ensures the entire cutting path is visible in advance, effectively extending the coverage range without increasing unit dimensions.
6Area of stationary object
If the lighting unit has relatively large dimensions, then light coverage range is ensured, but clear irradiation deteriorates due to dispersed light
Solution Approach 1:
The lighting function is segmented from the main body and concentrated into a compact unit at the rear end of the baseplate. This segmentation allows the light source to be small and focused, providing intense clear irradiation, while the rear positioning ensures the light covers the extended cutting area.
Solution Approach 2:
The lighting unit exploits the longitudinal dimension of the baseplate to achieve extended coverage. A compact unit positioned at the rear can illuminate a large area by projecting light forward along the cutting path, eliminating the need for large-dimensional lighting units that would disperse light.
Data Source
AI summary
A power tool includes a body, a power assembly, an output member, a clamping device, a battery pack, and a baseplate. The body includes a first body and a second body. The first body includes an upper finger stop portion and a lower finger stop portion that are disposed on a rear sidewall of the first body. The upper finger stop portion is disposed above the second body, and the lower finger stop portion is disposed below the second body. An outer diameter of the second body is greater than or equal to 35 mm and less than or equal to 65 mm. A distance between the upper finger stop portion and the lower finger stop portion along the front and rear direction is ΔL, and −15 mm≤ΔL≤30 mm.