Coil Holder Thin Fixing Structure for Stable Actuator Vibration
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Solution Overview
Problem
Existing actuators face challenges in maintaining stable vibration when reducing the gap between the magnet and coil, as a thinner connection body thickness can lead to instability and peeling of the gel state member.
Innovation Solution
The actuator design includes a coil holder with a plate part surrounding the coil, featuring a thinner connection body fixing part that secures sufficient thickness, and a yoke structure that supports the movable body, allowing for reduced gaps between the magnet and coil while maintaining stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the gap between the magnet and the coil is reduced to increase acceleration, then the acceleration of the movable body is improved, but the thickness of the connection body becomes too small causing unstable vibration and peeling
Solution Approach 1:
The coil holder is divided into two distinct parts: a coil holding part with sufficient thickness to maintain structural stability, and a connection body fixing part with reduced thickness to allow the connection body to maintain adequate thickness even when the gap between magnet and coil is reduced. This segmentation allows the system to achieve high acceleration while preventing connection body peeling.
Solution Approach 2:
Different parts of the coil holder are given different thickness characteristics: the coil holding part has greater thickness for structural support, while the connection body fixing part has thinner profile to accommodate the connection body with sufficient thickness. This local differentiation resolves the contradiction between reducing gap for acceleration and maintaining connection body thickness for stability.
2Reliability
If the thickness of the connection body is increased to ensure stable vibration, then the reliability is improved, but the gap between the magnet and the coil increases reducing acceleration
Solution Approach 1:
By segmenting the coil holder into coil holding part and connection body fixing part, the design allows the connection body to maintain sufficient thickness for stable vibration while the overall structure accommodates a reduced gap between magnet and coil for high acceleration performance.
Solution Approach 2:
The solution addresses the thickness-gap contradiction by introducing a dimensional differentiation within the coil holder structure itself, creating distinct regions with different thickness characteristics that simultaneously satisfy both requirements.
3Reliability
If the plate thickness of the connection body fixing part is reduced to allow sufficient connection body thickness, then the connection body stability is improved, but the structural strength of the coil holder may be compromised
Solution Approach 1:
The coil holder is segmented into a thick coil holding part for structural strength and a thin connection body fixing part for connection stability. This segmentation allows each part to be optimized for its specific function without compromising overall structural integrity.
Solution Approach 2:
The coil holder exhibits local quality differentiation where the coil holding part has greater thickness for structural support while the connection body fixing part has reduced thickness to ensure connection body stability, with each region optimized for its specific functional requirement.
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
This design enhances acceleration and stability of the movable body's vibration by ensuring a sufficient connection body thickness, even with reduced gaps, and protects the coil from collisions with the magnet.
Implementation Method 1
a magnetic drive circuit which includes a coil held by the coil holder and a magnet facing the coil in a first direction and is structured to vibrate the movable body with respect to the support body in a second direction intersecting the first direction
Data Source
AI summary
An actuator includes a movable body, a support body having a coil holder, a connection body connected with the movable body and the support body, and a magnetic drive circuit having a coil held by the coil holder and a magnet for vibrating the movable body. The coil holder has a plate part which surrounds at least a part of the coil, and the movable body has a yoke holding the magnet. The plate part has a coil holding part along an outer edge of the coil and a connection body fixing part whose plate thickness is thinner than that of the coil holding part. The connection body includes at least one of a first connection body connecting a first facing part of the yoke with the connection body fixing part and a second connection body connecting a second facing part of the yoke with the connection body fixing part.