Reverse-Tapered Golf Club Hosel for Adjustable Loft and Lie Angles
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Solution Overview
Problem
Conventional golf clubs require screws for fixing the sleeve, which add mass and hinder weight distribution, and existing attachment methods are not easily detachable or adjustable for optimal loft and lie angles.
Innovation Solution
A golf club design featuring a reverse-tapered tip engagement part with spacers that allow for adjustable angle settings without screws, using a reverse-tapered hosel hole for secure attachment and easy detachment, enabling independent adjustment of loft and lie angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a screw is used to fix the sleeve from the lower side, then the sleeve can be securely attached, but the mass increases and weight distribution is hindered
Solution Approach 1:
The invention removes the screw fastening mechanism entirely, extracting the harmful element (screw) that caused mass increase and weight distribution issues. The sleeve attachment is achieved through a interference fit between the sleeve's outer peripheral surface and the hosel hole's inner peripheral surface, eliminating the need for additional fastening components.
Solution Approach 2:
The invention replaces the mechanical screw-fastening system with a friction-based interference fit system. The reverse-tapered geometry creates radial interference forces that secure the sleeve without requiring threaded fasteners, thereby reducing mass while maintaining attachment reliability.
2Adaptability or versatility
If a fixed sleeve position is used, then the structure is simple, but loft angle and lie angle adjustment is limited
Solution Approach 1:
The invention introduces dynamic adjustability to the previously static sleeve position. The sleeve can be rotated to different angular positions around the shaft, allowing dynamic adjustment of loft and lie angles. This is achieved through the reverse-tapered geometry that permits angular variation while maintaining secure attachment at each position.
Solution Approach 2:
The invention segments the angle adjustment function into discrete positional options. By providing multiple reverse-tapered engagement positions around the circumference, the system allows selection of specific loft and lie angle combinations without requiring a complex continuous adjustment mechanism.
3Ease of operation
If a conventional tapered hole is used, then the fit is secure, but the sleeve cannot pass through easily and detachment is difficult
Solution Approach 1:
The invention inverts the conventional tapered geometry by using a reverse-tapered shape where the hole is wider at the entry end and narrower at the engagement end. This inversion allows the sleeve to be inserted easily from the wider end while creating a secure interference fit at the narrower engagement surface, and enables simple detachment by reversing the insertion motion.
Data Source
AI summary
A golf club includes a head 200, a shaft 300, and a tip engagement part RT having a reverse-tapered shape and being disposed at a tip end portion of the shaft 300. The tip engagement part RT includes a sleeve 400 having a reverse-tapered shape and being fixed to the tip end portion of the shaft 300, and a spacer 500 having a reverse-tapered shape and being externally fitted to the sleeve 400. The spacer 500 has a divided structure. The hosel part 202 includes a hosel hole 204. The hosel hole 204 includes a reverse-tapered hole 206 corresponding to the shape of the outer surface of the tip engagement part RT. The hosel hole 204 allows the sleeve 400 to pass through the hosel hole 204. The tip engagement part RT is fitted to the reverse-tapered hole 206, and the sleeve 400 is fitted inside the spacer 500.