Racket Threading Clamp Gap Adjustment Mechanism
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Solution Overview
Problem
Conventional string clamping devices for racket threading machines face difficulties in adjusting the gap width effectively due to resistance forces from the strings, leading to troublesome repeated adjustments.
Innovation Solution
A string clamping device with a fixing structure that includes an adjustment disc, a coupling shaft, a screwing element, and a support part, which allows the adjustment disc to rotate in a single direction, ensuring the connection column moves without expanding the gap width as strings are threaded, using a screwing element and second spring to maintain consistent clamping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the adjustment member is rotated to adjust the gap width during string threading, then the gap width can be adjusted, but the resistance force from the strings causes the adjustment member to move repeatedly, making the adjustment troublesome
Solution Approach 1:
The patent extracts the adjustment function from the connection column and transfers it to the adjustment disc. The adjustment disc can be rotated independently to adjust the gap width without being affected by the resistance force from the strings, which acts on the clamp unit rather than the adjustment mechanism. This separation allows smooth adjustment without repeated movements.
Solution Approach 2:
The adjustment disc serves as an intermediary between the operator and the connection column. By rotating the adjustment disc, the connection column is driven to adjust the gap width, but the adjustment disc itself is not directly subjected to the resistance force from the strings. This intermediary mechanism eliminates the troublesome repeated movement issue.
2Adaptability or versatility
If the connection column moves to adjust the gap width, then the gap width changes to accommodate different string diameters, but the resistance force from the strings causes the gap width to expand
Solution Approach 1:
The adjustment disc acts as an intermediary that drives the connection column to adjust the gap width for different string diameters, while the clamp unit (body and fixing seat) directly resists the string tension. This separation ensures that the gap width adjustment is not compromised by the resistance force from the strings.
Solution Approach 2:
The patent segments the clamping system into an adjustment function (adjustment disc and connection column) and a clamping function (clamp unit with body and fixing seat). The adjustment function handles gap width variation for different string diameters, while the clamping function maintains stable clamping force against the strings, preventing unwanted gap expansion.
3Stability of the object's composition
If the adjustment member is rotated repeatedly to maintain gap width, then the gap width can be maintained, but the operation becomes troublesome and time-consuming
Solution Approach 1:
The adjustment function is extracted from the connection column and assigned to the adjustment disc. The adjustment disc can be rotated smoothly without being affected by the resistance force from the strings, allowing gap width adjustment to be performed easily without repeated operations.
Solution Approach 2:
The clamp unit automatically resists the resistance force from the strings, maintaining the clamping force without requiring the operator to repeatedly adjust the gap width. The adjustment disc only needs to be rotated once to set the appropriate gap width for the string diameter, and the system self-maintains the stability.
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 smooth string threading by maintaining a consistent gap width, reducing the effort required for adjustments and improving the efficiency of the clamping process, especially for strings of varying diameters.
Implementation Method 1
a first end of the second spring abuts against the retaining portion of the affix member, and a second end of the second spring moves into the first through orifice and fits on the support part, wherein the second spring contacts with a drive tab of the support part proximate to the screwing element so that the second spring pushes the retaining portion to contact with the adjustment disc
Implementation Method 2
a front end of the connection column screws with the adjustment disc, the connection column is rotatably connected with the abutting block
Data Source
AI summary
A string clamping device of a threading machine for a racket contains: a clamp unit, a tightening unit, an adjustment disc, a connection column, and a fixing structure. The clamp unit includes a body, a locking seat, and two first springs. The body has multiple first paws, the locking seat has multiple second paws, and among the multiple first and second paws is defined a gap of the clamp unit. The tightening unit includes an abutting block and an operation handle, the body has a first protrusion with a first through orifice, and the adjustment disc includes multiple teeth, wherein between any two adjacent teeth is defined a recess. The fixing structure includes an affix member, a coupling shaft, a second spring, a screwing element, and a support part, wherein the affix member has a retaining portion, and the second spring contacts with a drive tab of the support part.