Reciprocation Actuator Fastening Device for Telescopic Screw Alignment
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Solution Overview
Problem
Conventional telescopic screws face issues with the screw shaking relative to the sleeve, making it difficult to align with fastening holes and limiting the ease of extension or retraction, especially due to the small screw head size.
Innovation Solution
A fastening device incorporating a reciprocation actuator and an elastic element, allowing the fastening unit to move in a reciprocating motion within and outside a locating seat, preventing shaking and enabling accurate alignment and fastening to a workpiece, with configurations including a stop unit, shank unit, and fastening unit, and various actuator designs such as retraction and push units or outward-tilting prevention surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional telescopic screw is used, then the structure is simple, but the screw shakes relative to the sleeve making alignment difficult
Solution Approach 1:
The patent introduces a reciprocation actuator as an intermediary component between the screw and the operator's hand. This actuator includes a reciprocating groove that guides the screw's motion, preventing lateral shaking while allowing controlled reciprocating movement. The actuator mediates the interaction between the operator and the screw, providing stability during alignment operations.
Solution Approach 2:
The patent transforms the static screw structure into a dynamic system by adding the reciprocation actuator that enables controlled reciprocating motion. The screw can now move dynamically in a reciprocating manner along the longitudinal axis while being constrained laterally by the actuator's guiding groove, allowing easy alignment without shaking.
2Ease of operation
If the screw head is made small for compactness, then the device is more compact, but the screw cannot be easily pushed downward or pulled upward
Solution Approach 1:
The reciprocation actuator serves as a mechanical intermediary that amplifies the operator's input force. By pushing or pulling the actuator body, the operator can easily move the screw without needing to directly grasp the small screw head. The actuator's larger surface area and lever arm provide mechanical advantage, making it easy to operate despite the compact screw head design.
Solution Approach 2:
The patent adds a new dimension of operation by introducing the reciprocation actuator body that extends perpendicular to the screw axis. Instead of directly manipulating the screw head along its axis, the operator now interacts with the actuator body in a different spatial dimension, providing better leverage and control for pushing and pulling operations.
3Adaptability or versatility
If the screw is allowed to move freely in the sleeve, then the screw can be extended and retracted, but the screw shakes and cannot be easily aligned with the fastening hole
Solution Approach 1:
The patent implements a dynamic constraint system where the reciprocation actuator allows motion in the longitudinal direction (extension and retraction) while constraining lateral motion. The reciprocating groove in the actuator body guides the screw's movement, providing controlled freedom that maintains both adaptability for extension/retraction and precision for alignment.
Solution Approach 2:
The patent segments the motion degrees of freedom by separating longitudinal movement (allowed) from lateral movement (constrained). The reciprocation actuator acts as a motion separator, permitting the screw to extend and retract along its axis while preventing lateral shaking through the guiding groove, thus achieving both extension capability and alignment precision.
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 effectively prevents the fastening member from shaking, allowing for convenient and accurate alignment and fastening to a workpiece, enhancing the ease of use and precision in aligning the screw with the fastening hole.
Implementation Method 1
an elastic element having an end pressed against the locating seat and another end pressed against the fastening member
Data Source
AI summary
A fastening device is provided, which includes a locating seat for engaging with a first workpiece; a fastening member including sequentially connected stop unit, shank unit and fastening unit, the fastening unit being configured for fastening to a second workpiece; a reciprocation actuator movably disposed on the locating seat with the shank unit extended through and movably located in the reciprocation actuator and the locating seat, the stop unit abutted on a top of the reciprocation actuator, the fastening unit movable in a reciprocating motion between an inner side and an outer side of the locating seat or outside the locating seat; and an elastic element having an end pressed against the locating seat and another end pressed against the fastening member.