Fastener Driver Magazine Latch for Compact High-Speed Reloading
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Solution Overview
Problem
Existing fastener drivers face power, size, and cost constraints, particularly in battery-powered designs.
Innovation Solution
A battery-powered fastener driver with a magazine system that includes a magazine cover and body, a nosepiece, a latch, and a pusher body, utilizing a biasing member to hold the pusher body in a latched position for efficient fastener reloading, and a compact design with a drive mechanism and lifter assembly for high-speed operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a battery-powered drive mechanism is used, then portability and operational flexibility are improved, but power delivery consistency and sustained high-speed operation deteriorate
Solution Approach 1:
The drive mechanism is segmented into a battery-powered motor assembly and a separate pneumatic system. The motor drives a piston that compresses air in a reservoir, which then powers the fastener ejection through pneumatic pressure. This segmentation allows the battery to provide intermittent power for compression while storing energy pneumatically for consistent high-power delivery.
Solution Approach 2:
The system performs preliminary action by using the battery-powered motor to compress and store pneumatic pressure in a reservoir before fastener ejection is needed. This pre-compression of air allows the system to deliver consistent high-power bursts without requiring the battery to provide continuous high current, thereby maintaining power delivery consistency while preserving portability.
2Volume of moving object
If a compact magazine design is used, then device size is reduced, but fastener reloading speed and efficiency deteriorate
Solution Approach 1:
The magazine body is designed to be dynamically movable relative to the magazine cover, transitioning between a closed position during operation and an open position for reloading. This dynamic design allows the magazine to maintain a compact form factor during use while enabling rapid access for fastener replacement by opening the magazine body, thus resolving the contradiction between compact size and reloading speed.
Solution Approach 2:
The magazine is segmented into a movable magazine body and a stationary magazine cover. The magazine body can be independently opened and closed to access the fastener supply, allowing users to quickly reload fasteners without manipulating the entire device. This segmentation enables rapid reloading while maintaining a compact overall device size.
3Reliability
If a latch mechanism is used to hold the pusher body, then fastener feeding reliability is improved, but device complexity increases
Solution Approach 1:
The latch mechanism is designed to automatically engage with the pusher body when the magazine body is in the closed position, and automatically disengage when the magazine body opens. This self-service latch operation ensures reliable fastener feeding without requiring additional control mechanisms or user intervention, thereby improving reliability while minimizing the increase in device complexity.
Solution Approach 2:
The latch mechanism is integrated into the magazine body structure, combining the latching function with the existing magazine opening/closing motion. The latch projection on the magazine body directly interacts with the pusher body through the opening in the magazine cover, merging the latching action with the magazine's primary mechanical movement. This integration ensures reliable fastener feeding while avoiding the need for separate, complex latching systems.
4Productivity
If high-speed fastener ejection is achieved, then productivity is improved, but mechanical stress and component durability deteriorate
Solution Approach 1:
The fastener ejection mechanism uses pneumatic pressure from a compressed air reservoir to propel fasteners at high speed. The pneumatic system delivers controlled bursts of high-pressure air through a nozzle directed at the fastener, achieving high ejection speeds without the mechanical stress and impact forces associated with purely mechanical spring or cam-based ejection systems, thereby preserving component durability.
Solution Approach 2:
Compressed air acts as an intermediary between the battery-powered motor and the fastener ejection process. The motor compresses air into a reservoir, and this stored pneumatic energy mediates the transfer of force to the fastener, enabling high-speed ejection while distributing mechanical stress across the pneumatic system rather than concentrating it in single mechanical components, thus improving both productivity and component durability.
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 provides a compact, efficient, and cost-effective fastener driver capable of high-speed operation with a magazine system that ensures reliable fastener feeding and driving, addressing power and size constraints.
Implementation Method 1
a biasing member configured to bias the pusher body and the fasteners within the magazine toward the nosepiece when the magazine body is in the closed position
Data Source
AI summary
A fastener driver includes a magazine having a magazine cover and a magazine body. The magazine cover includes a top surface having an opening defined therein. The magazine body is slidably movable relative to the magazine cover from a closed position to an open position. A latch is coupled to the top surface of the magazine cover and extends through the opening in the top surface of the magazine cover. The latch includes a latch projection that defines a first contact surface. A pusher body is slidably coupled to the magazine body and includes an arm member that defines a second contact surface. A biasing member biases the pusher toward a nosepiece when the magazine body is in the closed position. The first and second contact surfaces are engageable to hold the pusher body in a latched position when the magazine body is in the open position.