Vibration Motor Elastic Member Positioning
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Solution Overview
Problem
Existing vibration motors in portable consumer devices face challenges in accurately fixing elastic members during the soldering process, leading to positioning issues that affect the motor's performance.
Innovation Solution
The vibration motor design incorporates elongated weights with engagement parts and recesses, along with elastic members that include fixing parts and latches, to securely suspend and position the magnet assemblies within the housing, allowing precise alignment and vibration along specific axes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If elastic members are soldered to the magnet assembly during the soldering process, then the elastic members can be attached to the magnet assembly, but it is difficult to fix the position of the elastic members accurately
Solution Approach 1:
The elastic member is divided into two distinct parts: a first part that attaches to the magnet assembly and a second part that attaches to the housing. This segmentation allows each part to be optimized for its specific attachment location, with the first part designed to work with the engagement part on the magnet assembly and the second part with the recess in the housing, thereby achieving accurate positioning without soldering difficulties
Solution Approach 2:
The magnet assembly is pre-formed with an engagement part (such as a protrusion or tab) that corresponds to the first part of the elastic member. This preliminary preparation of the engagement part allows the elastic member to be accurately positioned and attached before final assembly, eliminating the need for difficult soldering operations and ensuring precise positioning
2Ease of operation
If the magnet assembly is elastically suspended in the housing, then the magnet assembly can vibrate freely, but the position of the magnet assembly cannot be precisely controlled
Solution Approach 1:
The elastic member has different structural characteristics at different locations: the first part is designed with properties suitable for attaching to the magnet assembly (allowing movement), while the second part is designed with properties suitable for attaching to the housing (providing positioning). This local differentiation allows the magnet assembly to vibrate freely while maintaining precise positional control through the anchored second part
Solution Approach 2:
The elastic member acts as an intermediary element between the magnet assembly and the housing. It provides the necessary elastic suspension for free vibration while simultaneously serving as a positioning mechanism through its two-part structure, where the second part anchors to the housing to control the overall position of the magnet assembly
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 the motor's ability to generate effective vibrations by ensuring accurate positioning of the magnet assemblies, improving the motor's performance and reliability by preventing interference and allowing for precise vibration direction control.
Implementation Method 1
a coil assembly (16) used for interacting with the first and second magnet assemblies (13, 14) for producing Ampere Force to drive the vibration unit to vibrate
Implementation Method 2
a plurality of elastic members (15) that suspends the vibration unit in the housing (11)
Data Source
AI summary
A vibration motor is disclosed. The vibration motor includes a housing, a substrate engaging with the housing, a vibration unit received in the housing, an elastic member suspending the vibration unit, and a coil assembly interacting with the vibration unit. The elastic member includes a second fixing part having a first segment with a first width, a second segment having a second width smaller than the first width for forming a step, and the vibration unit includes a latch corresponding to and engaging with the step for positioning the elastic member.