Caulking Gun Bar-Linkage Assembly Simplification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional caulking guns have a complex bar-linkage system that requires excessive force to operate, is difficult to manufacture and assemble, and is prone to rust-related issues, leading to inefficiencies and usability problems.
Innovation Solution
A caulking gun design featuring a simplified bar-linkage assembly with a pushing element driven by an elastic force, where the trigger's motion efficiently moves the pushing rod forward with reduced waste of force, and includes a restriction element to control the pushing rod's movement, enhancing ease of use and manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a conventional bar-linkage assembly is used, then the pushing rod can be moved forward, but excessive force is needed and force is wasted in the complicated bar-system
Solution Approach 1:
The patent extracts and eliminates the complicated intermediate bar-linkage assembly from the force transmission path. By directly connecting the trigger to the pushing rod through a simplified linkage, the design removes unnecessary components that caused force waste, allowing the applied force to be more efficiently transmitted to move the pushing rod forward.
Solution Approach 2:
Instead of using a complex multi-bar linkage system that transforms trigger motion through multiple intermediate steps, the patent inverts the approach by using a simplified direct linkage that maintains force efficiency. The trigger connection is redesigned to directly engage the pushing rod mechanism, reversing the conventional complex transformation path into a streamlined force transmission system.
2Ease of operation
If a complicated bar-system is used, then the pushing rod can be actuated, but the structure is difficult to manufacture and assemble
Solution Approach 1:
The patent segments the bar-linkage assembly into fewer, simpler components with clearer functional divisions. By reducing the number of interconnected bars and joints, each component becomes easier to manufacture independently, and the overall assembly process is simplified while maintaining the ability to actuate the pushing rod effectively.
Solution Approach 2:
The patent removes unnecessary intermediate bars and connection points from the linkage system. This extraction of redundant components reduces manufacturing complexity and assembly steps while preserving the core functionality of transferring trigger motion to push the rod forward, making the structure easier to produce and assemble.
3Ease of operation
If a complicated bar-system with multiple connections is used, then the pushing rod can be moved, but the connections may be stuck due to rusting
Solution Approach 1:
The patent extracts and eliminates multiple intermediate connection points from the bar-system. By reducing the number of joints and pivot points, there are fewer locations where rust can accumulate and cause sticking. The simplified linkage maintains pushing rod movement capability while significantly reducing reliability risks associated with multiple connections.
Solution Approach 2:
Instead of accepting multiple connections as necessary for functionality, the patent inverts the design philosophy by prioritizing connection reduction. The redesigned linkage achieves pushing rod actuation with minimal connections, thereby inverting the conventional approach where more connections were assumed to be needed for reliable operation.
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 design reduces the waste of force in the bar-linkage system, simplifies manufacturing and assembly, and prevents rust-related issues, resulting in a more efficient and user-friendly caulking gun.
Implementation Method 1
A pushing element (30) is received in the operation portion (11) and tends to move toward the second end under an elastic force of a first elastic element (33)
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A caulking gun includes a main body, a pushing rod, a pushing element, a bar-linkage assembly, and a trigger. The main body is formed with a handle extending downward. The pushing element and the bar-linkage assembly are arranged in the main body. The pushing rod is inserted through the main body and the pushing element. The bar-linkage assembly includes two bars aligned horizontally but not parallel to each other. One of the bars abuts against the pushing element. The trigger is pivotally disposed on the main body, and one end of the trigger abuts against a roller between the two bars. When the trigger is pulled, the roller is pushed upward by the trigger to push the pushing element forward via the bar-linkage assembly so that the pushing element inclines to bring the pushing rod move forward.