Mini Desktop Stapler Spring-Actuated Striker Mechanism
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Solution Overview
Problem
Conventional miniature staplers require excessive force for operation, making them uncomfortable and difficult to use, especially for tasks like stapling multiple pages, due to their direct action mechanism and lack of spring-powered assistance.
Innovation Solution
A compact, spring-actuated stapler design that utilizes a high start mechanism with a flat power spring and reset spring, allowing for efficient energy storage and release to eject staples with minimal user effort, enabling stapling of multiple pages with reduced hand pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a direct action mechanism is used in miniature staplers, then the device can be compact and simple, but excessive force is required for operation making it uncomfortable and difficult to use
Solution Approach 1:
The power spring is preloaded during handle compression to store energy before the stapling action is needed. This preliminary energy storage allows the striker to be propelled with sufficient force without requiring the user to apply excessive direct pressure during the actual stapling moment.
Solution Approach 2:
The mechanism converts continuous handle pressure into a periodic, concentrated impact through the spring-loaded striker system. The energy is accumulated during handle compression and then released in a brief, high-force pulse that ejects the staple, making operation more comfortable than continuous direct pressure.
2Ease of operation
If spring-powered assistance is added to miniature staplers, then operational comfort improves with reduced hand pressure, but device complexity increases
Solution Approach 1:
The power spring, striker, and handle mechanism are merged into a single integrated assembly where the striker is directly linked to the handle through the spring. This combination provides spring-powered assistance without requiring separate, complex subsystems, thus limiting the increase in overall device complexity.
Solution Approach 2:
The handle serves multiple functions: it compresses the power spring to store energy, directly controls the striker movement, and provides the user interface for operation. This multi-functionality reduces the need for additional dedicated components, thereby limiting complexity increase while providing spring-powered assistance.
3Length of stationary object
If a high start mechanism is used, then the stapler can be more compact vertically, but a release mechanism and energy storage system are required increasing complexity
Solution Approach 1:
The release function is merged into the handle compression action itself. When the user compresses the handle, it automatically releases the striker from its held position, allowing the stored spring energy to propel the striker forward. This integration eliminates the need for a separate, complex release mechanism while maintaining the compact high-start configuration.
Solution Approach 2:
The striker is preliminarily positioned above the staple track and the power spring is preloaded during handle compression. This preliminary preparation of both the striker position and spring energy storage enables the compact high-start design to function without requiring complex timing or coordination mechanisms during the actual stapling action.
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 spring-actuated stapler provides sufficient power to staple multiple pages with reduced hand pressure, making it comfortable to carry and use, fitting easily in small spaces, and suitable for various applications where a full-sized stapler is not practical.
Implementation Method 1
the striker is driven by a power spring... The striker is released to accelerate into and eject a staple
Implementation Method 2
The striker ejects a staple by impact blow
Implementation Method 3
a reset spring to lift the power spring and striker to their initial positions during reset
Data Source
AI summary
A stapler, comprises a housing (10), a handle (30) disposed toward a top of the housing, a track (80) including an extended length along a bottom of the housing and a striker (110) slidably fitted at a front of the housing. The striker is movable vertically within the housing between a position above the track (80) and a position in front of the track. The handle is linked to a power spring (90) whereby pressing the handle toward the housing causes the power spring to deflect and store energy. The power spring is attached to the housing at a rear end (93) of the power spring including a linkage to the striker, the power spring ejecting a staple upon release of the energy of the deflected power spring. The power spring includes a center arm (91) and outer arms (92) respectively attached to the rear end of the power spring. The arms are elongated to extend forward toward the striker (110) wherein the center arm (91) is movable with respect to the outer arms (92). Distal ends of the arms press against each other in a rest position of the power spring creating an internal preload within the power spring. In the rest position, a portion of the center arm is at a substantially same vertical position within the housing as the outer arm.