Electric Glue Gun Sensor Switch Limit Position Control
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Solution Overview
Problem
Existing electric glue guns are prone to damage due to excessive forward or rearward movement of the push rod, which requires operator intervention to prevent maloperation and damage, posing challenges in ensuring the integrity and stability of the tool.
Innovation Solution
An electric glue gun with a control board, main switch, electric motor, and sensor switches that detect limit positions to control the forward and rearward movement of the push rod, preventing excessive movement and ensuring timely power cutoff or reversal to avoid damage, utilizing optoelectronic switches and magnetic sensors for precise feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the electric motor continuously drives the push rod forward, then the glue output efficiency is improved, but the gun body suffers damage due to excessive forward movement
Solution Approach 1:
The patent employs sensor switches (e.g., Hall effect sensors, optoelectronic switches) that detect the position of the push rod and provide feedback signals to the control board. When the push rod reaches predetermined limit positions, the sensors trigger the motor to stop or reverse, preventing excessive forward movement that would damage the gun body while maintaining efficient glue output during normal operation.
Solution Approach 2:
The patent replaces manual mechanical limit stops with electronic sensing and control systems. Instead of relying on mechanical contact between the push rod and physical stops, the system uses magnetic fields (Hall effect sensors), light (optoelectronic switches), or other non-contact sensing methods to detect position and control motor movement, eliminating mechanical wear and improving reliability.
2Ease of operation
If the push rod moves rearward beyond maximum stroke, then the reset function is improved, but the gun body suffers damage due to excessive rearward movement
Solution Approach 1:
Sensor switches detect when the push rod reaches rearward limit positions and provide feedback to the control board. The control board monitors these signals to prevent the push rod from moving beyond maximum rearward stroke, protecting the gun body from damage while ensuring complete reset for the next operation cycle.
Solution Approach 2:
The system establishes preliminary protective measures by positioning sensor switches at predetermined limit locations before excessive movement can occur. These sensors create a warning system that activates before damage can happen, allowing the control board to take preventive action by stopping or reversing motor movement.
3Reliability
If manual stopping is used based on operator experience, then the gun can be protected from damage, but the operation complexity increases and maloperation is prone
Solution Approach 1:
The patent implements a self-protecting system where the glue gun automatically monitors its own operational parameters through integrated sensor switches and control boards. The system self-regulates motor movement, automatically stopping or reversing when limit positions are reached, eliminating the need for operator intervention and removing the burden of requiring experienced judgment to prevent damage.
Solution Approach 2:
The patent replaces manual operator judgment and control with automated electronic sensing and control systems. Instead of relying on operators to visually monitor and manually stop the gun at appropriate moments, the system uses sensors to automatically detect position and control board logic to manage motor operation, simplifying the user interface to basic trigger control while maintaining robust protection.
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
The solution effectively prevents damage to the gun body by accurately controlling the push rod's movement, enhancing the stability and integrity of the electric glue gun, reducing the risk of maloperation and ensuring consistent performance.
Implementation Method 1
The sensor switch comprises an emitting end and a receiving end, and the emitting end and the receiving end are respectively arranged at two axially opposite sides of the transmission gear and disposed in mutual correspondence
Implementation Method 2
a sensor switch for facilitating control of a forward/rearward movement stroke of the push rod. The sensor switch is electrically connected to the control board, such that the control board determines whether the push rod is moved to a limit position based on information feedback from the sensor switch
Data Source
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AI summary
An electric glue gun includes a housing (100), a glue tube holder (200) arranged at a front end of the housing (100), and a push rod (310) disposed on the housing (100) and moveable forward and rearward relative to the glue tube holder (200). A control board (410), a main switch (420), an electric motor (500) and a transmission mechanism (600) are provided inside the housing (100). The main switch (420) is electrically connected to the control board (410) for controlling power on/off, the electric motor (500) is electrically connected to the control board (400) to drive the push rod (310) to move forward or rearward via the transmission mechanism (600). The electric glue gun further includes a sensor switch for facilitating control of a forward/rearward movement stroke of the push rod (310), and the sensor switch is electrically connected to the control board (410), such that the control board (410) determines whether the push rod (310) is moved to a limit position based on information feedback from the sensor switch.