Stapler Hinge Mechanism for Wide Opening and Labor Saving
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Solution Overview
Problem
Existing staplers lack a labor-saving mechanism that allows for convenient staple placement due to a long resisting arm and limited opening angle, making it difficult to insert staples into the staple pin track and reducing the quantity of staples that can be mounted.
Innovation Solution
A stapler design featuring a hinge mechanism with a first guide part on the upper cover and a second guide part on the support base, allowing the upper cover to move downward and open widely, combined with a positioning mechanism to overcome spring force during stapling, enabling efficient staple placement and increased staple capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the lower end of the auxiliary upper cover is hinged at the front end of the base and the upper end is slidably connected into a first slide slot of an upper cover, then the structure is simplified, but the resisting arm of the upper cover becomes long and the opening angle becomes small
Solution Approach 1:
The patent applies the dynamics principle by making the hinge connection dynamic rather than fixed. The hinge allows the auxiliary upper cover to rotate and change its position dynamically during the stapling process, enabling the upper cover to achieve a larger opening angle while maintaining structural simplicity. The hinge mechanism transforms the static connection into a dynamic one, allowing the system to adapt its configuration during operation.
2Stability of the object's composition
If the first slide slot is positioned at the middle position of the upper cover, then the structure is stable, but the resisting arm becomes long and labor-saving effect is reduced
Solution Approach 1:
The patent applies the local quality principle by optimizing the position of the first slide slot locally rather than keeping it at the middle position. By relocating the slide slot to a position closer to the front end of the upper cover, the patent creates a shorter resisting arm that improves the labor-saving effect during stapling, while the overall structural stability is maintained through the hinge mechanism and guide part design.
3Device complexity
If the staple pusher is limited by the staple pusher spring, then the staple mounting mechanism is simple, but the quantity of mounted staples is reduced and operation becomes inconvenient
Solution Approach 1:
The patent applies the preliminary action principle by pre-positioning the staple pusher at the front end of the staple pin track using a limiting mechanism. This preliminary positioning ensures that the staple pusher is ready to receive and push staples immediately when needed, eliminating the need to manually overcome spring force during staple mounting. The limiting mechanism prepares the system in advance, allowing users to simply load staples without dealing with spring resistance.
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 achieves a better labor-saving effect by reducing the resisting arm and allowing easy staple insertion, resulting in improved convenience and increased staple capacity.
Implementation Method 1
the first guide part is set in a structure that when the upper cover is pressed, one end of the hinge can move to the tail end of the upper cover and press downward; a second guide part is disposed on the side wall of the support base, the other end of the hinge is slidably connected to the second guide part, the second guide part is set in a structure that when the upper cover is pressed, the other end of the hinge can move to the front end of the support base
Implementation Method 2
the rear end of the staple pusher is connected to the front end of the staple pusher spring, the rear end of the staple pusher spring is connected to the rear end of the staple pin track; Since the staple pusher spring can produce elastic force when compressed, a user has to open an upper blade and press the staple pusher with one hand
Data Source
AI summary
A stapler comprises a base (1), a staple pin track (2), a top blade assembly (3), a hinge (4) and an upper cover (5). Tail ends of the staple pin track, the top blade assembly and the upper cover are all hingedly connected to a tail end of the base. A first guide part is disposed on a side wall of the upper cover, and one end of the hinge is slidably connected to the first guide part. The first guide part is set in a structure that when the upper cover is pressed, one end of the hinge can move to the tail end of the upper cover and press downwards. A second guide part is disposed on the side wall of the base, and the other end of the hinge is slidably connected to the second guide part. The second guide part is set in a structure that when the upper cover is pressed, the other end of the hinge can move to a front end of the base, and when the upper cover is opened, the other end of the hinge is separated from the base. A middle part of the hinge is hingedly connected to a middle of the top blade assembly, and the first guide part is close to the tail end of the upper cover. The present invention has a good labor-saving effect and makes it convenient to put in staple pins.