Rotary Reciprocating Actuator Assembly for Precise Magnetic Alignment
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Solution Overview
Problem
The assembly of rotary reciprocating drive actuators with magnetic circuits is challenging due to the need for high-precision assembly of magnetic components, leading to increased assembly time and complexity.
Innovation Solution
A configuration that includes a main body unit with a movable shaft and magnet, a core assembly with magnetic poles and a coil, and a connecting surface portion to integrate the components, allowing for separate assembly and alignment of the magnetic circuit, thereby improving assembly accuracy and reducing time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the magnetic circuit is assembled on the rear surface of the mirror supported via a rotation shaft, then the assembly accuracy of magnetic components can be ensured, but the assembly time increases due to sequential assembly operations
Solution Approach 1:
The actuator is divided into two independent assemblies: the main body unit (containing mirror, rotation shaft, and magnetic circuit) and the driving unit (containing core assembly with magnetic poles and coil). These can be assembled separately and then integrated, allowing parallel assembly operations that reduce total assembly time while maintaining precision through dedicated assembly fixtures for each unit
Solution Approach 2:
The magnetic circuit is pre-assembled on the rotation shaft in the main body unit before final integration with the driving unit. This preliminary assembly allows for precise positioning and fixation of magnetic components on the rotation shaft, ensuring high assembly accuracy while enabling the driving unit to be prepared simultaneously, thereby reducing overall assembly time
2Loss of time
If the magnetic circuit and support structure are assembled simultaneously, then the assembly time is reduced, but the assembly accuracy decreases due to the complexity of coordinating multiple components
Solution Approach 1:
By segmenting the actuator into main body unit and driving unit, each with its own dedicated assembly fixtures and procedures, the patent enables separate assembly operations that can be performed in parallel. This maintains high assembly accuracy for the magnetic circuit while reducing total assembly time through concurrent preparation of both units
Solution Approach 2:
The rotation shaft serves as an intermediary component that connects the mirror to the magnetic circuit in the main body unit. This intermediate structure provides a stable platform for assembling the magnetic circuit with high precision, while the separate driving unit with its core assembly can be prepared independently, allowing time-efficient parallel assembly without compromising accuracy
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 ensures high assembly accuracy and stable driving performance while shortening the assembly time by allowing for independent assembly of the main body and driving units, enhancing the overall mechanical stability and efficiency.
Implementation Method 1
a magnet position holding portion that generates a magnetic attraction force between the magnet position holding portion and the magnet to define a reference position of the reciprocating rotation
Implementation Method 2
a coil body that is wound around the core body and that is energized to generate a magnetic flux interacting with the magnet to cause a reciprocating rotation of the movable body
Data Source
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AI summary
A rotary reciprocating drive actuator includes: a main body unit including: a movable body including a shaft part to which a movable object is connected at one end portion side of the shaft part and to which a magnet is fixed at an other end portion side of the shaft part, and a base portion including a pair of wall portions disposed to sandwich the movable object, the base portion supporting the shaft part by the pair of wall portions such that the shaft part is rotatable, in a state in which the other end portion side of the shaft part protrudes from one wall portion of the pair of wall portions; a core assembly including: a core body including a plurality of magnetic poles facing an outer circumference of the magnet to sandwich the magnet, a coil body that is wound around the core body and that is energized to generate a magnetic flux interacting with the magnet to cause a reciprocating rotation of the movable body, and a magnet position holding portion that generates a magnetic attraction force between the magnet position holding portion and the magnet to define a reference position of the reciprocating rotation; and a connecting surface portion that is integrally disposed on the one end portion side of the core assembly, and that is attached to the one wall portion in a state where the shaft part is inserted into an opening portion and the magnet is disposed in the core assembly.