Rivet Gun Eccentric Rotational Alignment Slot
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Solution Overview
Problem
Conventional rivet guns lack alignment structures, making it difficult for users to ensure the handle and pneumatic cylinder are aligned at the correct rotational angle during assembly, leading to frequent disassembly and incorrect fabrication.
Innovation Solution
Incorporation of a rotational angle alignment slot on the handle's annular flange and a rotational angle alignment element on the pneumatic cylinder's top cover, allowing for visual alignment and correct assembly without disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If alignment structures are not provided, then the assembly process requires repeated disassembly and reassembly, but this increases assembly time and reduces manufacturing efficiency
Solution Approach 1:
The patent applies preliminary action by pre-defining alignment slots and alignment protrusions on the handle and pneumatic cylinder components before assembly. These pre-configured alignment features guide the correct rotational positioning of components, eliminating the need for repeated disassembly and reassembly to achieve proper alignment.
Solution Approach 2:
The alignment slots and alignment protrusions act as intermediary elements that mediate between the handle and pneumatic cylinder during assembly. These intermediary alignment features enable precise rotational positioning by providing physical guides that ensure correct angular relationship between components without requiring complex measurement or adjustment procedures.
2Manufacturing precision
If alignment structures are added to ensure correct rotational angle, then assembly precision is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by adding alignment features only at specific critical locations where rotational positioning is needed, rather than complicating the entire device structure. The alignment slots on the handle and alignment protrusions on the pneumatic cylinder are localized features that provide precise angular positioning without affecting other parts of the device.
Solution Approach 2:
The alignment slots and alignment protrusions utilize asymmetric geometry to ensure correct rotational positioning. The non-symmetric shape of these alignment features allows only one correct rotational orientation, automatically guiding the assembler to the proper angular position without requiring complex symmetric adjustment mechanisms.
3Ease of operation
If visual alignment features are exposed on the assembled device, then alignment verification is easier, but the device appearance becomes more complex
Solution Approach 1:
The patent applies the principle of visual differentiation by making the alignment slots and alignment protrusions visible and distinguishable on the assembled device appearance. These exposed alignment features allow operators to easily verify correct rotational positioning through visual inspection, while their design integrates smoothly with the overall device aesthetics.
Data Source
AI summary
A rivet gun has a barrel, a handle, an annular flange, a pneumatic cylinder and a piston assembly. The handle protrudes downward from the barrel. The annular flange protrudes radially from the bottom end of the handle and has a bottom surface and a rotational angle alignment slot defined eccentrically in the bottom surface. The pneumatic cylinder is mounted under the handle and the annular flange and has a body and a top cover mounted on a top opening of the body and having a rotational angle alignment element mounted eccentrically on a top of the top cover and detachably engaging the rotational angle alignment slot of the annular flange. The piston assembly is mounted in the pneumatic cylinder. The rotational angle alignment slot and the rotational angle alignment element are both at least partially exposed to be visually observed from an appearance of the fully assembled rivet gun.