Screw Depth Adjuster with Flared Sleeve for Precision Control
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Solution Overview
Problem
Existing screw depth adjusters are inconvenient to use due to the inability to adjust screw depth in real-time, lack fine adjustment capabilities, and are prone to deformation and damage from high rotary torsion and impact forces, leading to inaccurate screw placement and surface damage.
Innovation Solution
A screw depth adjuster comprising a rod with a polygonal first portion for power tool connection and a threaded second portion, a control member with a push portion and polygonal stopper, and a driving member with a polygonal passage, allowing for real-time adjustment and prevention of screw over-driving through a flared sleeve that locks in place, enabling precise depth control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the depth control stop is rotated multiple times for adjustment, then the screw depth can be set, but the device is inconvenient to use and time-consuming
Solution Approach 1:
The flared sleeve provides visual feedback by showing the user the current depth setting directly on its surface. As the depth control stop rotates and moves the flared sleeve, the user can see the depth indication in real-time, eliminating the need for multiple trial adjustments and making the operation convenient and precise.
2Reliability
If the protrusions and longitudinally-oriented grooves are used to lock the depth control stop, then the depth can be held, but the high rotary torsion and impact forces cause deformation and the protrusions get locked in the grooves
Solution Approach 1:
The invention removes the problematic protrusions and longitudinally-oriented grooves from the depth control stop. Instead, it uses a flared sleeve with visual depth indication that can be rotated to set the desired depth, then locked by a retaining ring. This extraction eliminates the deformation and locking issues while maintaining depth holding capability.
3Manufacturing precision
If the sleeve is moved forward until flared end is beyond, then the depth can be set, but the position cannot be learned in real-time manner
Solution Approach 1:
The flared sleeve incorporates visual indicators (such as colored bands, markings, or transparent sections) that display the current depth setting. As the sleeve moves with the depth control stop, these visual indicators change position or color, providing real-time feedback to the user about the screw depth setting without requiring the user to stop and measure.
4Reliability
If the lock retaining ring is slid back over the depth control stop, then the depth is locked, but the device complexity increases
Solution Approach 1:
The invention combines the depth indication function and the locking function into an integrated system. The flared sleeve serves both as the depth indicator and as part of the locking mechanism. The retaining ring locks both the depth control stop and the flared sleeve together, eliminating the need for separate adjustment and locking operations, thus reducing operational complexity while maintaining reliability.
Data Source
AI summary
A screw depth adjuster used for driving screws to the required depth is revealed. Users can control the depth of the screw being driven to workpiece/material by the screw depth adjuster. The screw depth adjuster includes a rod assembled with a control member, a driving member and a flared sleeve. The control member abutting against and assembled with the driving member is used for locking the driving member so that the driving member is unable to move. The flared sleeve is driven by the driving member mounted therein to to move forward or backward on the rod. Users determine the longitudinal movement of the driving member according to the depth of the screw required so that the screw will not be driven beyond the depth required in the workpiece. Thereby dents formed on the surface of the workpiece can be minimized.