Caulking Gun Compact Design for Confined Space Operation
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Solution Overview
Problem
Conventional caulking guns occupy excessive space, making them inconvenient to operate in limited areas, difficult to carry, and challenging to store due to their large size, especially when replacing cartridges.
Innovation Solution
A caulking gun design featuring a cylindrical housing composed of semi-cylindrical shell members with a support portion for a handle, arc-shaped guide plates, and a flexible push plate that wraps around a guide roller, allowing for compact operation and storage by minimizing rearward space occupation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the push bar is extended rearward beyond the depressing section for cartridge replacement, then the cartridge replacement function is achieved, but the overall length and occupied space increase significantly
Solution Approach 1:
The push bar is designed as a movable component that can be selectively extended rearward only when cartridge replacement is needed, and retracted to a compact position during normal operation. This dynamic configuration allows the gun to adapt between two states: a functional state for cartridge replacement and a compact state for storage and carrying, thereby resolving the contradiction between versatility and length.
2Adaptability or versatility
If the push bar extends quite a distance rearward, then the caulking cartridge can be replaced, but the gun occupies excessive space making operation in limited areas difficult
Solution Approach 1:
The push bar transitions between extended and retracted positions dynamically, allowing the operator to access the cartridge replacement function when needed while maintaining a compact profile for working in confined spaces. This resolves the contradiction by providing both capabilities at different times rather than requiring both simultaneously.
3Adaptability or versatility
If the push bar is completely withdrawn rearward for cartridge replacement, then cartridge exchange is enabled, but the gun occupies space equivalent to two caulking cartridges
Solution Approach 1:
The push bar is designed to be completely withdrawable rearward to enable cartridge replacement, yet it can be fully retracted into the housing to minimize occupied volume. This dynamic positioning system allows the gun to achieve maximum cartridge replacement accessibility when needed, while returning to a compact configuration that occupies minimal space during normal use, storage, and carrying.
4Device complexity
If the conventional push bar design is used, then the structure is simple, but the gun is inconvenient for carrying and storage due to large size
Solution Approach 1:
The push bar is designed with a simple movable structure that can be completely withdrawn rearward for cartridge replacement and then fully retracted to a compact position. This maintains structural simplicity while enabling the gun to transition between a functional state for cartridge exchange and a compact state for carrying and storage, thereby resolving the contradiction between structural simplicity and portability.
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 enables flexible operation in confined spaces, enhances storage and carrying convenience by reducing the overall size of the caulking gun, allowing for efficient use and easy handling.
Implementation Method 1
the washer and the spring being received in the receiving space of the limiting space with an end of the push bar of the pushing section sequentially extending through the washer, the spring, and the receiving-through portion of the limiting member, the washer being biased by the spring
Implementation Method 2
Respectively received and retained in front, middle and rear portions of the housing are front, central, and rear guide plates, each forming an arc-shaped guide opening to receive a push plate extending therethrough. Rotatably set rearward of the rear guide plate between the housing shell members is a guide roller around which a rear portion of the push plate is wrapped
Data Source
AI summary
A caulking gun includes a housing forming a handle and supporting a cartridge holder for receiving and holding a caulking cartridge. A flexible push plate is received through the housing to have a front end extending into the cartridge holder to carry a push disk. The housing has front and rear portions respectively receiving therein an advancer and a gripper through which the push plate extends. A guide roller is rotatably received in the housing rearward of the gripper. A rear end of the push plate extends through the gripper and is wrapped around the guide roller for further extension frontward to project outside and above the cartridge holder. When a trigger of the handle comprising a trigger is actuated to cause the advancer to advance the push plate frontward for extrusion of the caulking cartridge to dispense caulking, the gripper holds and prevents the push plate from returning rearward.