Striking Tool Driver Replacement via Plunger Position Switching
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Solution Overview
Problem
Existing striking tools require complex disassembly and increased costs due to their multi-component structure, making driver replacement difficult, unsafe, and operationally inefficient, as they often involve compressed springs that can cause accidental operation during maintenance.
Innovation Solution
A striking tool with a sliding driver mechanism, a plunger, and a drive mechanism that allows switching between a usual standby position and a maintenance position closer to the ejecting port, minimizing the urging force and enabling safe and easy driver replacement by reducing the need for large openings and simplifying the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the housing is configured by left side, right side and front side components to enable driver replacement, then the driver can be replaced, but the mold structure becomes complicated and the number of components increases, leading to higher cost
Solution Approach 1:
The housing is divided into a main body and a detachable cover portion. The cover can be separated from the main body to provide access to the driver, enabling easy replacement without requiring multiple housing components. This segmentation approach simplifies the overall structure while maintaining repairability.
Solution Approach 2:
The cover portion is extracted as a separate detachable component from the housing. This allows the cover to be removed for driver access and then reattached, providing a simple mechanism for maintenance without complicating the housing structure with multiple permanent components.
2Ease of repair
If the front surface of the body is largely opened to replace the driver, then the driver can be accessed, but the tool is enlarged and the maintenance operability is not good
Solution Approach 1:
The housing is segmented into a main body and a removable cover. This segmentation allows access to the driver through a small, controlled opening when the cover is detached, rather than requiring a large opening of the entire front surface. The tool maintains its compact form while enabling maintenance access.
3Reliability
If the driver stands by in a state in which a compression coil spring is compressed, then the driver may operate during operation, but the user cannot perform the replacement operation for safety reasons
Solution Approach 1:
The plunger is moved to a maintenance position that pre-compresses the spring and stores energy before driver replacement. This preliminary action ensures that when the driver is replaced and the plunger returns to its operational position, the spring is already charged and ready to drive the driver, eliminating the need to compress the spring during maintenance and improving safety.
Solution Approach 2:
The plunger acts as an intermediary mechanism between the compression spring and the driver. By moving the plunger to a maintenance position, the spring is compressed indirectly through the plunger's movement, allowing energy storage without direct manual compression during driver replacement, thereby improving safety.
4Ease of repair
If it is necessary to disassemble the body to expose the driver, then the driver can be replaced, but it is troublesome to perform failure repair
Solution Approach 1:
The housing is divided into a main body and a detachable cover portion. This segmentation allows the cover to be easily removed to expose the driver for replacement, and then reattached to complete the repair process. The segmentation provides a simple, standardized interface for access without requiring complex disassembly of the entire housing structure.
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
Enables safe and easy driver replacement without the risk of accidental operation, reduces tool complexity and cost, and improves maintenance accessibility by allowing the driver to be replaced without opening the front surface extensively, thus enhancing operational safety and efficiency.
Implementation Method 1
a plunger urging member which is configured to urge the plunger toward the ejecting port
Data Source
AI summary
A striking tool includes: a driver which is provided to be slidable toward an ejecting port provided in a tip end of the striking tool so as to strike out a fastener from the ejecting port; a plunger to which the driver is coupled; a plunger urging member which is configured to urge the plunger toward the ejecting port: and a drive mechanism which is configured to move the plunger to accumulate urging force in the plunger urging member. A standby position of the plunger before striking out the fastener can be switched between a usual standby position and a standby position for maintenance closer to the ejecting port than the usual standby position.