Striking Unit Engagement Layout to Prevent Driving Tool Misalignment
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Solution Overview
Problem
The second engaging portion may engage with a first engaging portion that is different from the original engagement target in existing driving tools.
Innovation Solution
A driving tool with a striking unit that can be actuated between two positions, featuring a rotating portion with specific and normal engaging portions, ensuring the second engaging portions engage with their intended first engaging portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the second engaging portion engages with any first engaging portion during rotation, then the striking unit can be actuated in the second direction, but the second engaging portion may engage with the wrong first engaging portion causing misalignment and reduced reliability
Solution Approach 1:
The engaging portions are segmented into two distinct groups: normal first engaging portions and a specific first engaging portion (non-engaging portion). Similarly, the rotating portion has normal second engaging portions and a specific second engaging portion that does not engage. This segmentation ensures that only corresponding normal engaging portions interact during operation, preventing misengagement and maintaining reliable operation.
Solution Approach 2:
Different regions of the engaging portions have different functional qualities. The normal first engaging portions are designed to engage with normal second engaging portions for standard operation. The specific first engaging portion (non-engaging portion) is designed with different local properties to prevent engagement with the specific second engaging portion, ensuring that the striking unit cannot engage with the wrong portion and maintain operational reliability.
2Force
If the striking unit is actuated with maximum force, then the fastener can be driven effectively, but misengagement of the second engaging portion can reduce the striking force and performance
Solution Approach 1:
By segmenting the engaging portions into normal and specific (non-engaging) portions, the system ensures that only properly aligned engaging portions transmit force. This prevents misengagement that would reduce striking force, ensuring consistent maximum force delivery to the fastener during each actuation cycle.
Solution Approach 2:
The engagement mechanism provides inherent feedback through the mechanical interaction of the engaging portions. When the striking unit is actuated, the normal second engaging portions engage with the normal first engaging portions, confirming proper alignment before force transmission. The specific non-engaging portion prevents force transmission if misalignment occurs, ensuring that only correctly engaged cycles deliver maximum striking force.
Data Source
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AI summary
A driving tool capable of making a second engaging portion engage with a first engaging portion which is an original engaging target when a rotating portion is rotated in a state where a striking unit is stopped between a first position and a second position is provided. The driving tool includes a striking unit 12, a wheel 50 configured to actuate the striking unit 12, a plurality of first engaging portions provided on the striking unit 12, and a plurality of second engaging portions provided on the wheel 50. The plurality of first engaging portions includes first engaging portions 61 and 62 and first engaging portions 63 to 71. The plurality of second engaging portions includes a second engaging portion 51 engaging with the first engaging portions 61 and 62 when the wheel 50 is rotated in a state where the striking unit 12 is stopped at the second position and second engaging portions 52 to 60 engaging with the first engaging portions 63 to 71 when the wheel 50 is rotated in a state where the striking unit 12 is stopped at the second position. An adjustment mechanism 17, which makes the second engaging portion 51 engage with the first engaging portions 61 and 62 and makes the second engaging portions 52 to 60 engage with the first engaging portions 63 to 76 when the wheel 50 is rotated in a state where the striking unit 12 is stopped between the first position and the second position, is provided.