Torsion Spring Tacker With Low-Friction Release Link
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing staple gun tackers suffer from imprecise release systems, friction-induced force addition, jamming issues, and cumbersome latching mechanisms, particularly in rear-loading designs, which affect assembly efficiency and user experience.
Innovation Solution
A spring energized fastening tool with a torsion power spring featuring two forward extending arms, a rigid four-bar assembly, and a cantilevered lever system that ensures precise and repeatable release action, combined with a bottom-loading staple track and a simple unlatching mechanism, enhancing assembly compatibility and reducing operator effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a release system is used to suddenly release the striker, then the fastener can be ejected, but the release system becomes imprecise and adds friction
Solution Approach 1:
The release system is extracted as a separate, dedicated component (release link) that operates independently from the main four-bar linkage. This allows the release mechanism to be optimized specifically for precision and low-friction operation, while the main linkage focuses on power transmission. The release link pivots directly on the handle pivot, creating a simple, direct action path that minimizes friction points.
Solution Approach 2:
The release link acts as an intermediary between the handle and the striker. Instead of the handle directly controlling the striker through a complex mechanism, the release link serves as a dedicated mediator that translates handle motion into precise striker release. This intermediary component isolates the friction of the release mechanism from the power transmission path.
2Volume of moving object
If rear loading design is used, then the tool structure is compact, but the staples cannot be easily accessed and jamming occurs
Solution Approach 1:
The staple track is made dynamic through the track pull mechanism that allows the track to slide rearward. This transforms the static, compact rear-loading design into a dynamic system where the track can move to expose staples for access. The latching structure provides a stable locked position during operation but allows easy movement when needed, combining compactness with accessibility.
Solution Approach 2:
The track pull mechanism with latching structure prepares the system for staple access by providing a pre-configured mechanism to slide the track rearward. The latching structure is pre-positioned to hold the track in its operative position during firing, but can be easily disengaged to expose staples before use, preventing jamming before it occurs.
3Reliability
If a track pull with latching structure is used, then the track is held in operative position, but the latch becomes unwieldy and requires aesthetic compromise
Solution Approach 1:
The latching function is merged with the track pull mechanism itself. Rather than having a separate, complex latch structure, the track pull incorporates the latching capability through its interaction with the housing features. The track pull slides along guided paths and engages with simple retention features in the housing, combining the pulling and latching functions into a single, elegant mechanism.
4Ease of manufacture
If compression spring is used in sheet metal housing, then the construction is simple, but the spring type is limited
Solution Approach 1:
The housing design is made universal to accommodate multiple spring types. The sheet metal housing incorporates standardized mounting features and clearance spaces that work with compression springs, torsion springs, and bar springs. The internal geometry provides通用的 support surfaces and attachment points that adapt to different spring configurations, allowing the same housing to support various power source options.
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
The solution provides a compact, low-friction, and powerful fastening tool that is easy to assemble, operates with minimal effort, and reduces jamming, offering improved reliability and user comfort.
Implementation Method 1
a torsion power spring includes at least two forward extending arms with the arms pressing each other proximate a front distal end of the spring
Implementation Method 2
a rigid and movable four bar assembly that links the handle to the power spring and deflects the spring to separate and deflect the arms immediately upon pressing the handle
Implementation Method 3
A further embodiment has a cantilevered lever engaging the spring adjacent to the striker
Data Source
AI summary
A spring energized fastening tool with compact, rigid, low friction working elements is disclosed. A torsion power spring includes forward extending arms with the arms pressing each other proximate a front distal end of the spring. A cantilevered lever links to a handle and engages the spring adjacent to the striker. A bottom loading staple track unlatches and opens through a simple pulling-out action. Structures are provided to enable fitment with a formed sheet metal handle and housing. The fastening tool is particularly simple to assemble, powerful, and of low operating effort.