Head Suspension Trap for Piezoelectric Adhesive Containment
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Solution Overview
Problem
Existing head suspensions for disk drives face challenges in preventing nonconductive adhesive from oozing out and spoiling the periphery when attaching piezoelectric elements, which can damage the components and compromise insulation.
Innovation Solution
A head suspension design featuring a trap formed on the actuator base outside the opening to contain any overflowing nonconductive adhesive, ensuring it does not spread and spoil the surrounding area, while maintaining effective insulation and protection of the piezoelectric elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If nonconductive adhesive is used to attach the piezoelectric element to the opening, then the piezoelectric element is protected and insulation is secured, but the adhesive may ooze out and spoil the periphery of the opening
Solution Approach 1:
A groove is introduced as an intermediary structure between the opening and the peripheral surface. This groove acts as a mediator that captures and contains the oozing adhesive, preventing it from reaching and spoiling the peripheral surface while maintaining the adhesive's beneficial insulation and protection functions
Solution Approach 2:
The harmful effect of adhesive oozing is extracted and isolated by directing it into the groove structure. The adhesive is separated from the peripheral surface by being channeled into the groove, thus removing its harmful spoiling effect while preserving its useful bonding and insulation functions
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 adhesive diffusion, maintains the integrity of the piezoelectric element attachment, and ensures precise positioning of the magnetic head, enhancing the reliability and performance of the disk drive.
Implementation Method 1
a piezoelectric actuator having a pair of piezoelectric elements... the piezoelectric element attached to the opening and deforming in response to a voltage applied thereto
Data Source
AI summary
A head suspension has a load beam and a piezoelectric actuator. The piezoelectric actuator has an actuator base connected to a base part of the load beam and a piezoelectric element attached to an opening formed in the actuator base. The piezoelectric actuator displaces a front end of the load beam in a sway direction according to deformation of the piezoelectric element that occurs in response to a voltage applied thereto. The head suspension includes a nonconductive adhesive filled between the piezoelectric element and the opening, to fix the piezoelectric element to the opening and a trap formed on the actuator base outside the opening, to hold the nonconductive adhesive oozing out of the opening and prevent the oozed adhesive from spreading. The trap prevents the oozed adhesive from contaminating the periphery of the opening.