Nested U-Yoke Speaker Structure for Narrow-Frame Sound Output
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Solution Overview
Problem
Existing speaker designs face a challenge in balancing the size and sound quality, as reducing the speaker width to fit narrow frames often compromises sound performance due to the need for auxiliary structures that widen the frame or reduce the magnetic circuit.
Innovation Solution
A speaker design where the U-yoke is arranged within the frame's mounting hole, allowing for a thinner side wall thickness and maximizing the U-yoke and magnetic circuit size, while maintaining the frame's overall width, thereby enhancing sound performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the frame width is reduced to meet narrow frame requirements, then the size of the speaker is reduced, but the magnetic circuit between the U-yoke and voice coil portion is reduced, causing sound effect to deteriorate
Solution Approach 1:
The U-yoke is nested within the frame's mounting hole, with the voice coil portion extending through the U-yoke into the accommodating cavity. This nested arrangement allows the magnetic circuit components to be compactly integrated within the frame width, achieving both small speaker size and adequate magnetic circuit for sound quality.
Solution Approach 2:
The design transitions from a two-dimensional planar arrangement to a three-dimensional spatial configuration by extending the voice coil portion through the U-yoke into the accommodating cavity. This dimensional change allows the magnetic circuit to maintain adequate size while the overall speaker width is reduced, resolving the contradiction between compact size and sound effect.
2Ease of manufacture
If an auxiliary structure is provided on the frame edge to cooperate with the speaker box shell for mounting and sealing, then installation and sealing are achieved, but the frame width must be widened or the magnetic circuit reduced, causing speaker size to increase or sound effect to worsen
Solution Approach 1:
The frame's mounting hole serves multiple functions: it provides the magnetic circuit path for the U-yoke, enables mounting of the speaker to the box shell, and the interconnected accommodating cavity provides sealing space. This multi-functionality eliminates the need for separate auxiliary mounting structures, maintaining compact size while achieving installation and sealing requirements.
Solution Approach 2:
The mounting structure is merged with the frame body itself through the mounting hole and accommodating cavity design, rather than being separate auxiliary components. This integration allows mounting and sealing functions to be achieved without adding extra width to the frame, resolving the contradiction between ease of manufacture and compact size.
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 improves sound performance by increasing the magnetic circuit and voice coil size without increasing the frame width, while reducing the overall speaker size, ensuring reliability and sealing, and facilitating heat dissipation.
Implementation Method 1
a voice coil portion (30), wherein a part of the voice coil portion (30) is located in the U-yoke (20), and the other part of the voice coil portion (30) is located in the accommodating cavity (12)
Implementation Method 2
Speakers in the related art usually use magnetic flux generated by a magnetic gap between a voice coil portion and a U-yoke to vibrate the voice coil portion
Data Source
AI summary
The present disclosure provides a speaker and a speaker box. The speaker includes a frame, a U-yoke and a voice coil portion. The frame includes two side walls disposed opposite to each other, and there is an interconnected accommodating cavity and mounting hole between the two side walls. The maximum distance between the two side walls in the mounting hole is A, and the distance between the two side walls in the accommodating cavity is B, where A>B. The U-yoke is arranged in the mounting hole, an outer wall of the U-yoke fits an inner wall of the mounting hole. A part of the voice coil portion is located in the U-yoke, and the other part of the voice coil portion is located in the accommodating cavity.