Archery Sight Elevation Adjustment with Pivot Nut and Cam Tension Control
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Solution Overview
Problem
Conventional archery sight adjustment mechanisms are time-consuming and lack the ability to adjust and lock tension between the carriage and elevation bar, making it difficult to quickly and precisely adjust for different target distances during tournaments.
Innovation Solution
An elevation adjustment mechanism featuring a pivot nut with interchangeable threads, a spring-biased button for quick coarse adjustment, and a tension system with yoke, cam shaft, and gibs to control the tension between the carriage and elevation bar, along with a windage carriage for additional adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional incremental adjustment mechanisms are used, then fine tuning adjustment is possible, but adjustment time increases significantly when more than fine tuning adjustment is required
Solution Approach 1:
The adjustment mechanism is segmented into two independent systems: a coarse adjustment system using a ratchet mechanism with movable carriage that allows rapid positioning, and a fine adjustment system using a threaded rod that enables precise incremental tuning. This segmentation allows users to perform quick coarse adjustments followed by precise fine-tuning, resolving the contradiction between speed and precision.
Solution Approach 2:
The mechanism dynamically transitions between two operational modes: in coarse adjustment mode, the ratchet mechanism enables rapid carriage movement along the elevation bar; in fine adjustment mode, the threaded rod provides controlled incremental movement. This dynamic switching between adjustment modes allows the system to optimize for either speed or precision based on the user's needs.
2Adaptability or versatility
If conventional fixed tension mechanisms are used, then结构简单 (structure is simple), but the user cannot adjust and lock the tension of elevation travel between the carriage and elevation bar
Solution Approach 1:
A tension adjustment mechanism is pre-configured into the system comprising a movable carriage, threaded rod, and locking mechanism. The carriage can be positioned to adjust tension before use, and the locking mechanism pre-prepares the system to secure the tension setting. This preliminary configuration enables tension adaptability without requiring complex external adjustment devices.
Solution Approach 2:
The tension adjustment and locking system is designed to be self-contained and self-regulating. The movable carriage allows the user to adjust tension independently, and the locking mechanism automatically secures the setting without requiring additional tools or complex procedures. This self-service design provides adaptability while minimizing overall system complexity.
3Speed
If the carriage is designed for smooth travel along the elevation bar, then adjustment speed increases, but control precision may be compromised
Solution Approach 1:
The movement control is segmented into two phases: rapid movement phase using the ratchet mechanism that allows the carriage to travel quickly along the elevation bar, and precision positioning phase using the threaded rod that enables controlled, precise incremental adjustments. This segmentation allows smooth fast travel while maintaining positioning accuracy through the fine adjustment system.
Solution Approach 2:
The threaded rod acts as an intermediary mechanism between the carriage and the elevation bar. During rapid adjustment, the ratchet mechanism moves the carriage along the bar; during precision positioning, the threaded rod mediates the final positioning by providing controlled resistance and precise incremental movement, ensuring accuracy is not compromised by the speed of initial positioning.
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
Enables quick and precise elevation adjustments, increased tension control, and smooth travel, allowing for faster setup and optimal sight positioning for varying target distances.
Implementation Method 1
A spring-biased button is connected with the elevation carriage and is operable to pivot the pivot nut via a link between the drive and release positions
Implementation Method 2
The yoke and carriage are arranged on opposite sides of the elevation bar so that when the yoke is drawn to the carriage, tension between carriage and elevation bar is increased
Implementation Method 3
A cam shaft connected with the elevation carriage is operable to move the yoke toward or away from the carriage to adjust the tension between the carriage and the bar
Implementation Method 4
The inner surface of the throughbore contains first threads on one side at one end of the pivot nut and second threads on the opposite side of the inner surface at the other end of the nut. The first and second threads engage threads on the screw when the drive mechanism is in a drive position
Data Source
AI summary
An adjustable mechanism for an archery sight is characterized by a unique elevation and tension adjustment assemblies which allow a user to quickly and easily set the sight for optimum performance. The mechanism includes an elevation bar having an elevation carriage connected therewith for sliding movement along the bar in a first direction. A windage carriage is connected with the elevation carriage for movement in a second direction, and a sight is connected with the windage carriage. The elevation bar includes a drive screw and the elevation carriage includes a uniquely configured nut releasably connected with the drive screw so that the elevation carriage can be quickly displaced relative to the elevation bar. Tension adjustment between the elevation carriage and the elevation bar is provided by a unique adjustable cam and gib assembly operable by the user. In addition, tension between the windage carriage and the elevation carriage is afforded by a uniquely configured gib of synthetic plastic material in which the tensile strength of the material provides the necessary tension.