Bone Conduction Vibration Assembly with Segmented Elastic Support
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Solution Overview
Problem
Existing bone conduction vibration sound producing apparatuses suffer from a rolling vibration phenomenon, which leads to noise and potential damage, and have limitations in improving acoustic quality and reliability due to the small size of the apparatus.
Innovation Solution
The apparatus includes a housing with a flexible circuit board connected to a coil, a vibration assembly within the housing, and two elastic members connected to both ends of the vibration assembly, which supports and limits the vibration assembly, thereby improving linearity and reducing rolling vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the vibration assembly has a narrow strip shape to fit the small mounting space, then the device size is reduced, but the rolling vibration phenomenon becomes more intense
Solution Approach 1:
The single elastic piece is divided into two separate elastic members, each connected to one end of the vibration assembly. This segmentation allows each elastic member to independently support one end, preventing the rolling vibration that occurs when only one end is supported. The segmentation resolves the contradiction by enabling stable support in the narrow strip-shaped configuration.
Solution Approach 2:
The second elastic member acts as a counterbalancing support to the first elastic member. When one elastic member supports one end of the vibration assembly, the other elastic member provides counterbalancing support at the opposite end, preventing the assembly from rolling or swinging transversely. This counterweight principle directly addresses the stability issue in narrow strip-shaped designs.
2Device complexity
If only one elastic piece is used to connect the vibration assembly to the housing, then the device complexity is reduced, but the rolling vibration phenomenon occurs
Solution Approach 1:
The single elastic piece is segmented into two separate elastic members, each connected to one end of the vibration assembly. This segmentation provides balanced support at both ends, preventing the rolling vibration phenomenon while maintaining relatively simple device structure. The segmentation is the key principle that resolves the contradiction between simplicity and stability.
Solution Approach 2:
Each elastic member is specifically designed to support one end of the vibration assembly, providing localized support where needed. This local quality approach ensures that each end of the vibration assembly receives appropriate support, preventing rolling vibration while keeping the overall structure simple and targeted.
3Volume of moving object
If the elastic arms are made short and narrow to fit the small device size, then the device compactness is improved, but the acoustic quality and reliability deteriorate
Solution Approach 1:
By dividing the elastic support into two separate members, each elastic member can be optimized for its specific function without being constrained by the need to span the entire device. This segmentation allows each elastic member to be designed with appropriate dimensions for reliable acoustic performance while maintaining overall device compactness.
Solution Approach 2:
The elastic members are arranged in different spatial dimensions, with each member positioned at opposite ends of the vibration assembly. This dimensional arrangement allows the elastic members to provide effective support without requiring excessive length or width, maintaining device compactness while ensuring acoustic quality and reliability.
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 solution effectively mitigates the rolling vibration phenomenon, improves the linearity of the vibration assembly, and enhances the acoustic quality and reliability of the bone conduction vibration sound producing apparatus.
Implementation Method 1
The vibration assembly is magnetic, vibrates under the action of a magnetic field of the coil being energized
Implementation Method 2
the vibration assembly may be reset under the action of the elastic piece
Data Source
AI summary
The present invention discloses a bone conduction vibration sound producing apparatus and a wearable device. The bone conduction vibration sound producing apparatus includes a housing, a vibration assembly, a coil, and two elastic members. The housing is provided with an accommodating cavity. A flexible circuit board connected to the coil is disposed outside the housing. The flexible circuit board is disposed at an end of the housing in a length direction, and is configured to be connected to an external control circuit. The vibration assembly is provided in the accommodating cavity. The coil is fixed with respect to the housing and surrounds an outer periphery of the vibration assembly. The two elastic members are respectively connected to two ends of the vibration assembly and are both connected to the housing.