Rotatable Knob Guiding Structure for Adhesive Tape Dispenser
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Solution Overview
Problem
Conventional adhesive tape dispensers require a large force to operate due to continuous oblique tracks with less than 90° curvature, making them laborious to use, and lack a limiting mechanism, leading to poor positioning and easy over-rotation of the dispensing unit.
Innovation Solution
An adhesive tape dispenser with a rotatable knob featuring a guiding structure with limiting ends and a resilient element, allowing for a smoother operation and precise positioning by reducing the force needed to dispense the tape and preventing over-rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If continuous oblique tracks with less than 90° curvature are used on the knob, then the adhesive tape dispensing unit can be moved, but a large force is needed to rotate the knob making operation laborious
Solution Approach 1:
The guiding structure is designed with a curvature greater than 90°, creating a smoother, more gradual transition path. This increased curvature reduces the abruptness of the force application, allowing the user to rotate the knob with less effort while still achieving the full range of motion needed to dispense the adhesive tape.
Solution Approach 2:
The invention changes the geometric parameter of the guiding structure from less than 90° curvature to greater than 90° curvature. This parameter change fundamentally alters the mechanical advantage throughout the rotation, distributing the required force more evenly and reducing the peak force needed during operation.
2Measurement precision
If continuous oblique tracks are used on the knob, then the adhesive tape dispensing unit can be moved, but the knob is easily rotated overly and the dispensing unit cannot be well positioned
Solution Approach 1:
The guiding structure is divided into distinct segments: a first guiding structure for the forward motion to dispense the tape, and a second guiding structure for the return motion. This segmentation allows each segment to be optimized for its specific function, with limiting ends that define precise stopping positions, preventing over-rotation while maintaining ease of operation.
Solution Approach 2:
The limiting ends of the guiding structures provide tactile feedback to the user, indicating when the dispensing unit has reached its forward and backward positions. This feedback mechanism allows the user to know when to stop rotating the knob, ensuring accurate positioning without requiring complex control systems.
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 enables a labor-saving and convenient operation by reducing the rotational force required and ensuring accurate positioning of the dispensing unit, making the dispenser easier to use and control.
Implementation Method 1
a resilient element (18) mounted in the body to provide a recoil force to the adhesive tape dispensing unit
Data Source
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AI summary
An adhesive tape dispenser has a body (10,10A,10B), an adhesive tap dispensing unit (12,12A,12B), a knob (14,14A,14B), a pushing element (16) and a resilient element (18,18A,18B). The knob (14,14A,14B) is mounted rotatably on the body (10,10A,10B) and has a guiding structure (15,15A,15B) formed obliquely on the knob (14,14A,14B) and having two ends each having a limiting capability to restrict a rotating range of the knob (14,14A,14B) relative to the body (10,10A,10B) between the ends of the guiding structure (15,15A,15B). The pushing element (16) is mounted slidably in the body (10,10A,10B) and has a guided structure (162) connected slidably to slide along the guiding structure (15,15A,15B) on the knob (14,14A,14B). The resilient element (18,18A,18B) is mounted in the body (10,10A,10B) to provide a recoil force to the adhesive tape dispensing unit (12,12A,12B).