Vibration Motor Plate Spring Elastic Member Design
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Solution Overview
Problem
Conventional vibration motors with multiple elastic members to restrict movement increase component count, making weight reduction difficult and prone to interference and damage.
Innovation Solution
A vibration motor design featuring a stationary portion with projecting elements and plate spring elastic members that support the vibrator, limiting its movement range and preventing interference, while maintaining a simple structure and reducing the number of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple elastic members are arranged to support the vibrator and restrict movement, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple elastic members into a single integrated elastic member structure. The first and second elastic members are merged into one piece that supports both ends of the vibrator, reducing the total number of components while maintaining the ability to restrict movement in both directions. This merging resolves the contradiction by achieving the same reliability function with fewer parts, thus reducing device complexity.
2Reliability
If two elastic members are arranged on either side of the vibrator in the vibration direction, then the reliability is improved, but the weight increases
Solution Approach 1:
The patent merges multiple elastic members into a single elastic member that provides support at both ends of the vibrator. This integration reduces the total weight of the elastic support system while maintaining the reliability function of restricting vibrator movement in both directions during vibration operation.
3Reliability
If the vibrator and movement restriction portion are arranged to overlap, then the movement restriction is improved, but object-generated harmful factors increase due to interference
Solution Approach 1:
The patent introduces an elastic member as an intermediary element between the vibrator and the movement restriction portion. This elastic member mediates the interaction by providing flexible support that allows controlled movement while preventing direct harmful contact and interference between the vibrator and the rigid movement restriction structure, thus reducing object-generated harmful factors.
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 design effectively limits the vibrator's movement range, preventing damage and interference, while achieving a weight reduction and improved structural integrity, thus enhancing the motor's reliability and efficiency.
Implementation Method 1
a coil (50) fitted to an inner circumferential surface of the base portion (11)
Implementation Method 2
The plate spring portion (32) includes a decreased width portion (325) and increased width portions (324)
Data Source
AI summary
A vibration motor includes a stationary portion including a casing and a coil; a vibrator including a magnet, and at least one elastic member. The magnet is arranged on an upper side of the coil. The stationary portion includes at least one projecting portion arranged to project in the vertical direction. A portion of the at least one projecting portion is arranged opposite to a portion of the vibrator in the one direction. The at least one elastic member includes a plate spring portion arranged to support at least one of both ends of the vibrator with respect to the one direction. The plate spring portion includes a decreased width portion and an increased width portion, the decreased width portion being above or below a corresponding one of the at least one projecting portion when viewed from one side in the one direction.