Blower Control Assembly with Integrated Start and Speed Regulation
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Solution Overview
Problem
Existing blowers require separate operations for starting and regulating speed, leading to inconvenience and safety hazards due to accidental maximum speed activation, which can cause injury from debris.
Innovation Solution
A blower design with a rotatable control member and actuating member that allows for integrated speed control and start functions, preventing accidental maximum speed activation by using a stopper and elastic member to manage rotational positions and forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate start switch and speed regulator are provided, then the blower can be started and speed can be regulated, but the user operation steps increase and continuity of operation is disrupted
Solution Approach 1:
The patent combines the start switch function and speed regulator function into a single integrated control assembly. The actuating member (trigger) and control member work together to provide both start/stop control and speed regulation through a unified interface, reducing the number of separate control components and simplifying user operation.
Solution Approach 2:
The control assembly is designed to perform multiple functions: the actuating member controls motor start/stop while the control member regulates speed. This multi-functional design allows a single control mechanism to handle both starting operations and speed adjustment, improving ease of operation without requiring separate dedicated controls for each function.
2Reliability
If start switch is accidentally triggered, then the motor starts running, but the motor may run at maximum rotational speed causing safety hazards
Solution Approach 1:
The control function is segmented into two independent members: the actuating member for start/stop control and the control member for speed regulation. This segmentation ensures that accidental activation of the start function cannot directly cause maximum speed operation, as the speed control requires separate intentional action through the control member.
Solution Approach 2:
The control member acts as an intermediary between the actuating member and the motor speed control. Even when the actuating member accidentally triggers motor start, the control member must be deliberately positioned to allow maximum speed operation. This intermediary mechanism prevents direct coupling between start activation and maximum speed, enhancing safety while maintaining operational continuity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances user convenience and safety by allowing continuous operation with adjustable speed control, preventing accidental maximum speed activation and reducing the risk of injury from debris.
Implementation Method 1
an elastic member mounted to the housing, and the elastic member is configured to apply a force to the control member to restore the control member from the second control state to the first control state
Implementation Method 2
the blower further includes a stopper for preventing the actuating member from crossing the predefined limit position
Implementation Method 3
the control member includes a first protrusion, the actuating member further includes a sliding portion; when the control member rotates about the second rotation axis to enter the first control state from the initial state, the first protrusion drives the sliding portion of the actuating member to make the actuating member to rotate
Implementation Method 4
the control member further includes a second protrusion, the actuating member is provided with a through hole; when the control member rotates to the second control state from the first control state, the second protrusion passes through the through hole to drive the push rod to move along the first straight line direction
Data Source
Figure 1
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Figure 3~4
AI summary
A blower includes: a housing; a fan; a motor; and a speed regulator assembly including a switch for controlling the motor operation, a control member and an actuating member both enabled to control the switch. The actuating member can move between an off state and an on state, the actuating member can move to a predefined limit position, the rotational speed of the motor corresponding to the predefined limit position is a predefined rotational speed. When the actuating member is in the off state, the motor stops running. When the actuating member is in the on state, the motor rotates. The control member has at least a first control state and a second control state. In the second control state, the motor runs at a maximum rotational speed. In the first control state, the motor runs at an intermediate speed lower than the maximum rotational speed.