Power Tool Handle Layout for One-Handed Mode Switching
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Solution Overview
Problem
Existing impact drivers require users to operate the switch panel with one hand while supporting the tool with the other, limiting operational modes and ease of use due to the placement of the switch panel on the lower-end side of the handle.
Innovation Solution
A power tool design featuring a main switch on the handle part that allows for ON/OFF control and a state-changing operation part, such as a button or lever, positioned on the main-body part or handle, enabling easier operation of the tool with one hand by allowing the state-changing operation to be performed with the index finger while gripping the handle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the switch panel is provided on the lower-end side of the handle part, then the structure is simplified, but the ease of operation deteriorates because the user must operate the switch panel with one hand while supporting the impact driver with the other hand
Solution Approach 1:
The patent relocates the state-changing operation part from the lower-end side of the handle to the upper-end part of the handle or lower part of the main-body part, changing the spatial dimension of control element placement. This dimensional shift allows the thumb to naturally access the operation part while gripping the handle, transforming the operation geometry from a two-handed configuration to a one-handed configuration without increasing structural complexity
2Ease of manufacture
If the switch panel is provided on the lower-end side of the handle part, then the manufacturing cost is reduced, but the operational modes are limited
Solution Approach 1:
By repositioning the state-changing operation part to the upper-end part of the handle or lower part of the main-body part, the patent enables new operational modes including one-handed operation and various gripping positions. This spatial relocation maintains manufacturing simplicity while significantly increasing operational versatility and adaptability to different user preferences and work conditions
Data Source
AI summary
A power tool includes a motor disposed in a motor housing, a handle extending downward from the motor housing, a main switch provided on the handle and configured to switch the motor ON and OFF, and a state-changing operation part located on a lower portion of the motor housing or on an upper-end portion of the handle. The state-changing operation part is located upward of the main switch and is configured to effect a change of a rotational state of the motor, other than a direction of rotation of the motor, or an illumination level of a light.