Power Tool Switch Assembly With Sliding Lock and Pivot Start
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Solution Overview
Problem
Conventional safety switches in power tools, such as the grip type switch assembly, often fail to distinguish clearly between the action of starting and actuating the start switch, leading to accidental activation and potential safety hazards, limiting their further application under new safety regulations.
Innovation Solution
A switch assembly design featuring a locking switch that slides between a locking and releasing position, forming an angle of 0° to 60° with the longitudinal axis, and a start switch that is rotably connected with a pivot, ensuring the start switch is locked when the locking switch is in the locking position and released when in the releasing position, preventing accidental activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a grip type switch assembly is used with the safety switch arranged on the upper side of the handle, then the structure is simple and convenient to use, but it is difficult to significantly distinguish between the action of starting the safety switch and the action of actuating the start switch, leading to accidental activation
Solution Approach 1:
The switch assembly is divided into two distinct operational components: a sliding locking switch and a rotatable start switch. This segmentation separates the safety function (locking switch) from the start function (start switch), making their actions clearly distinguishable and preventing accidental activation while maintaining ease of operation.
Solution Approach 2:
Instead of using the conventional grip type where both switches are pressed in similar directions, this invention inverts the start switch operation to a rotatable motion. This inversion creates a clear distinction between the sliding safety switch action and the rotational start switch action, eliminating confusion and accidental activation.
2Reliability
If a linkage type safety switch is used, then safety protection is provided, but the structure becomes more complex and requires additional操作步骤 (operating steps) to activate the start switch
Solution Approach 1:
The locking switch and start switch are merged into a single integrated switch assembly housing, with the locking switch structurally integrated to directly engage with the start switch. This merging maintains safety protection while simplifying the overall structure and reducing the number of separate components compared to traditional linkage type switches.
Data Source
AI summary
The disclosure provides a switch assembly and a power tool. The switch assembly includes a housing which extends along the longitudinal axis, a main control switch which is housed within the housing, a locking switch which is slidably connected with the housing and can move between a locking position and a releasing position, and a start switch which is rotably connected with the housing by a pivot. The locking switch is in contact with the start switch when the locking switch is in the locking position, and the start switch is in a locked state. The locking switch is disengaged from the start switch when the locking switch is in the releasing position, and the start switch is in a released state.