Actuator Coil Positioning Plate for Larger Coils in Compact Assemblies
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional actuators face limitations in increasing the size of the coil, which restricts acceleration and vibration generation due to the use of resin coil holders, leading to a large number of components and assembly processes.
Innovation Solution
The actuator employs a metal first plate to fix an air-core coil, utilizing a notch portion for precise positioning, eliminating the need for a resin coil holder, allowing larger coil dimensions and reduced components, and enabling increased acceleration and vibration without enlarging the actuator's external size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a resin coil holder is used to position the coil, then the coil can be positioned and fixed, but the coil size is limited and the number of components increases
Solution Approach 1:
The patent merges the coil positioning function and the plate function into a single integrated structure. The plate includes a positioning portion that directly positions the coil, eliminating the need for a separate resin coil holder. This integration reduces the number of components while maintaining positioning accuracy through the positioning portion that contacts the coil.
2Power
If the coil size is increased to enhance acceleration and vibration, then the vibration performance improves, but the actuator external size must be enlarged
Solution Approach 1:
The patent repositions the coil in the thickness direction (Z-direction) of the plate, allowing the coil to extend beyond the plate's thickness. This dimensional arrangement enables a larger coil size for enhanced acceleration and vibration performance without increasing the actuator's planar footprint, as the coil utilizes the thickness dimension efficiently.
3Reliability
If a plate is fixed from both sides with coil and magnet, then the components are secured, but the number of assembly processes increases
Solution Approach 1:
The patent extracts and eliminates the resin coil holder from the assembly, leaving only the metal plate as the fixing structure. The plate is fixed from one side only, and the coil is positioned by the positioning portion integrated into the plate. This simplification reduces the number of assembly processes while maintaining reliable component fixation through the positioning mechanism.
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 configuration enables larger coils for enhanced acceleration and vibration generation while reducing the number of components and assembly steps, improving positioning accuracy and maintaining a compact design.
Implementation Method 1
a magnetic drive circuit including a coil 10 and a magnet 16 facing the coil 10 in a first direction (Z1 direction), and vibrating the movable body 5 with respect to the support body 3 in a second direction (X direction) intersecting the first direction
Data Source
AI summary
An actuator includes a movable body, a support body provided with a case that houses the movable body and a coil assembly, a first connecting body and a second connecting body to be connected to the movable body and the support body, and a magnetic drive circuit that vibrates the movable body with respect to the support body in an X direction. The coil assembly includes a first plate that overlaps the coil from a Z1 direction, and a second plate that overlaps the coil from a Z2 direction. The first plate includes a notch portion that comes into contact with a short side portion of the coil from an outer peripheral side, and positions the coil by the notch portion.