Air Tool Lever Stability via Multi-Point Engagement
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Solution Overview
Problem
Conventional air tools with safety mechanisms for restricting control lever displacement often engage in an unstable condition, leading to potential accidental operation of the air tool.
Innovation Solution
An air tool design featuring a control lever with two abutting projections and a restricting member with two restricting projections, both with U-shaped cross-sections, engaging in a stable manner to prevent unintended operation by abutting at multiple points, with the restricting member supported by a guide surface on the air supply pipe.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-point engagement between stopper and control lever is used, then the device complexity is reduced, but the stability of the engaged condition deteriorates
Solution Approach 1:
The invention divides the engagement interface into multiple discrete contact points. The control lever is equipped with two abutting projections, and the restricting member has two restricting projections, creating a multi-point engagement system. This segmentation transforms a single unstable contact into multiple stable contacts, resolving the contradiction between simple structure and stable engagement.
Solution Approach 2:
The invention introduces a new spatial dimension to the engagement mechanism by adding projections that extend in the displacement direction of the control lever. This creates engagement contacts distributed along the lever's movement path, adding dimensional stability to the engagement and preventing accidental operation while maintaining structural simplicity.
2Stability of the object's composition
If multiple abutting projections are used to improve engagement stability, then the stability of the engaged condition is improved, but the device complexity increases
Solution Approach 1:
The invention merges the multiple projections onto single integrated components. Both the abutting projections and restricting projections are formed as integral parts of their respective components (control lever and restricting member) through single-piece manufacturing processes. This merging approach achieves multi-point engagement stability while avoiding the complexity of assembling multiple separate parts.
Solution Approach 2:
The control lever and restricting member are designed with multi-functional projections that simultaneously serve engagement, positioning, and locking functions. The abutting and restricting projections not only prevent accidental operation but also guide the movement and maintain the operational positions of the control lever, reducing the need for additional specialized components.
Data Source
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AI summary
[Technical Problem] Provided is an air tool configured such that a restricting member restricting the displacement of a control lever is engageable with the control lever in a more stable condition. [Solution to Problem] An air tool (10) includes a restricting member (36) restricting the displacement of a control lever (34). The control lever (34) is displaceable between a stop position where a valve (32) is closed and a drive position where the valve is open. The control lever (34) has two abutting projections (68a and 68b) projecting in a direction in which the control lever moves when displaced to the drive position. The restricting member (36) has two restricting projections (70a and 70b) projecting in a direction opposite to the projecting direction of the abutting projections so as to oppose to the abutting projections. The restricting member (36) is displaceable between a restricting position where the restricting projections (70a and 70b) abut against the associated abutting projections (68a and 68b) to stop the control lever (34) from being displaced to the drive position and a release position where the restricting projections and the abutting projections do not abut against each other to allow the control lever to be displaced to the drive position. The abutting projections are spaced from each other in the displacement direction of the restricting member, and so are the restricting projections.