Glue Gun Adjustable Lever Mechanism for Viscosity Control
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Solution Overview
Problem
Common glue guns have fixed squeezing mechanisms, making it difficult to achieve uniform glue discharge and control glue flow, especially with glues of varying fluidity, leading to excessive extrusion and waste.
Innovation Solution
The glue gun features an adjustable gear system with a sliding groove and pivot pin shaft, allowing switching between gears to accommodate different glue viscosities, and an elastic component to prevent gear shifting, enabling adjustment between fast and powerful feed modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed squeezing mechanism is used in the glue gun, then the structure is simple, but it is difficult to control glue discharge speed uniformly and adapt to different glue viscosities
Solution Approach 1:
The patent applies the dynamics principle by making the squeezing mechanism adjustable rather than fixed. The lever arm length can be dynamically changed to adapt to different glue viscosities and discharge requirements. This allows the same device to handle both high-viscosity and low-viscosity glues effectively, resolving the contradiction between adaptability and structural simplicity.
Solution Approach 2:
The patent changes the physical parameter of the lever arm length to achieve different squeezing forces and discharge speeds. By adjusting the lever arm length parameter, the device can adapt to various glue characteristics without changing the overall structure fundamentally, thus maintaining relative simplicity while gaining versatility.
2Productivity
If the user presses the trigger mechanism quickly to increase glue discharge speed, then productivity is improved, but control precision is lost and glue waste increases due to excessive extrusion
Solution Approach 1:
The patent replaces the direct manual pressing mechanism with a lever-based mechanical system. This substitution provides mechanical advantage and allows for more precise control of the squeezing force. The lever mechanism translates small movements at one end into controlled movements at the other end, enabling precise glue discharge control while maintaining high productivity.
3Force
If a large force is applied in the beginning to discharge solidified glue, then the glue flow is initiated, but the fixed squeezing mechanism cannot maintain consistent discharge speed throughout the process
Solution Approach 1:
The adjustable lever arm length allows the user to apply larger initial force when needed (by positioning the pivot point closer to the glue barrel) and then transition to smaller forces for maintaining flow (by moving the pivot point). This dynamic adjustment capability enables both high initial force and consistent subsequent discharge speed, resolving the contradiction.
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
This solution allows for precise control of glue discharge speed, reducing waste and improving usability with various glues by adjusting the force applied, ensuring consistent application and preventing glue flow when not in use.
Implementation Method 1
an elastic component to prevent gear shifting
Data Source
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AI summary
The present invention provides a glue gun, comprising a movable handle and a fixed handle, wherein the movable handle is connected to fixed handle via a pivot pin shaft; the movable handle is further provided with an actuating member, and the actuating member is provided with an actuating part cooperating with a push member; and a spacing between the pivot pin shaft and the actuating part is sized to be switchable between two or more gears, such that the magnitude of the force applied by the actuating member on the push member is changed. The gear in the present invention can be adjusted to enable switching between a fast feed and a powerful feed, thereby enabling a user to make adjustment according to actual requirements.