Horizontal Pull Coating Film Transfer Tool with Rotation Locking Pawl
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Solution Overview
Problem
Existing coating film transferring tools often experience the 'stringing' phenomenon, where excess transfer tape is pulled instead of a clean cut, due to unreliable locking mechanisms for the supply reel, leading to inefficiencies and user discomfort.
Innovation Solution
A horizontal-pull coating film transferring tool with a rotation locking mechanism that engages and disengages the supply reel using a pawl system, ensuring reliable locking and unlocking through an elastic return mechanism, preventing unwanted rotation and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rotation preventing member with elastic resiliency is used to prevent supply reel rotation, then the supply reel can be locked when not in use, but the member tends to become deformed causing unintentional release and reducing reliability
Solution Approach 1:
The rotation preventing member is divided into a pawl portion and an arm portion that can rotate relative to each other around a rotation axis. This segmentation allows the pawl to engage with teeth on the supply reel for reliable rotation prevention, while the arm can rotate independently to avoid deformation issues that would cause unintentional release.
Solution Approach 2:
The rotation preventing member transitions from a static elastic component to a dynamic system where the arm can rotate around the rotation axis. This dynamic capability allows the member to adapt to operational states (locked during storage, unlocked during use) without deforming, thereby maintaining reliability throughout the device lifecycle.
2Manufacturing precision
If the supply reel is locked during transfer operation to prevent stringing, then clean severing of transfer tape is achieved, but extraneous movement of the transfer head occurs at the beginning of transfer operation
Solution Approach 1:
The rotation preventing member is designed to rotate around the rotation axis, enabling it to switch between locked and unlocked states. During transfer operation, the member rotates to unlock the supply reel, preventing extraneous transfer head movement. After transfer completes, it rotates back to lock the supply reel, ensuring clean severing of the transfer tape.
Solution Approach 2:
The rotation preventing member is positioned and configured in advance to engage with the supply reel teeth. Before transfer operation begins, it is already in place to prevent rotation, and the system is prepared to rotate it into the unlocked position immediately when needed, ensuring both stability during operation and precision during severing.
3Reliability
If a pawl system with elastic return mechanism is used for locking, then reliable locking and unlocking is achieved, but the device complexity increases
Solution Approach 1:
The pawl system, elastic return mechanism, and rotation preventing member are merged into a single integrated component. The pawl portion engages with supply reel teeth for locking, while the arm portion rotates around the rotation axis to enable unlocking during operation. This merging reduces the number of separate parts and simplifies the overall device structure while maintaining reliable locking and unlocking functionality.
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
Effectively prevents the 'stringing' phenomenon by ensuring clean severing of the transfer tape and reducing noise and rotational resistance, providing a more reliable and user-friendly operation.
Implementation Method 1
an elastic return mechanism 23 between the base member 19 and the case 2
Implementation Method 2
the force of restitution of an elastic body, such as a spring, is used to produce the torque of the take-up reel or supply reel through frictional force that is produced on a sliding surface between components
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3
AI summary
[Problem] To provide a horizontal-pull coating film transferring tool able to prevent effectively the stringing phenomenon through properly severing the transfer tape after a transfer operation. [Means for Resolution] A base member 19 wherein a transfer head 5 is attached to the front end and wherein a rotation locking member 20 having a supply reel engaging pawl 20a able to lock the rotation of the supply reel 4 is disposed, in the back half portion, is supported so as to be able to rotate on a base member pivoting supporting portion 21 that is provided in a case, structured so that the rotational lock of the supply reel is released through rotation of the base member when the transfer head is pressed against the transfer-destination surface and the rotation of the supply reel is locked through the base member returning to the original position through a compression spring 23a, and wherein rotation supporting shafts 8 and 13 for the supply reel and the take-up reel are disposed so as to be substantially perpendicular to the direction of a pressing edge portion 5a on the front end of the transfer head.