Crossover Double Speaker With Sound Release Holes
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Solution Overview
Problem
Conventional double speakers face issues with increased size and volume due to cumbersome manufacturing processes, sound dampening, and reduced audio output, as well as difficulty in distinguishing between high-pitched and low-pitched tones, due to the configuration of magnets and vibration plates.
Innovation Solution
A crossover double speaker design with a U-shaped yoke, sound release holes, and separate speaker units where the first speaker unit generates high-pitched tones and the second unit generates low-pitched tones, with sound release holes on the yoke and cover to ensure clear sound output in the same direction, reducing size and thickness while maintaining a wide frequency band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the first pole piece, magnet, and second pole piece are laminated one after another in the cylinder portion of the yoke, then the speaker can produce both high-pitched and low-pitched tones, but the height of the cylinder portion increases, causing the whole speaker size and volume to increase
Solution Approach 1:
The patent repositions the second speaker unit from the vertical direction (above the flange) to the horizontal direction (outside the cylinder portion at the same level as the bottom). This dimensional change allows both speaker units to operate simultaneously without stacking magnets vertically, thus reducing the cylinder portion height while maintaining dual frequency coverage.
Solution Approach 2:
The patent divides the speaker system into two independent speaker units with separate magnetic circuits. The first speaker unit (high-pitched) uses magnets inside the cylinder portion, while the second speaker unit (low-pitched) uses magnets outside the cylinder portion. This segmentation allows independent placement and eliminates the need for vertical lamination of multiple magnet assemblies.
2Adaptability or versatility
If the second speaker unit is installed on the upper side of the flange of the yoke, then low-pitched tones can be generated, but the low-pitched sound is dampened in the process of passing through between the cylinder portion and the inside of the housing, causing sound output reduction
Solution Approach 1:
The patent extracts the second speaker unit from the constrained space between the cylinder portion and housing, and relocates it to the outside of the cylinder portion. This extraction removes the sound dampening effect caused by the narrow passage, allowing low-pitched sounds to output freely without obstruction.
3Volume of stationary object
If the size (thickness) of the magnet is made smaller to reduce the height and volume of the speaker, then the speaker size decreases, but the audio output is lowered
Solution Approach 1:
The patent merges the magnetic circuits of both speaker units by positioning them adjacently (one inside, one outside the cylinder portion) rather than stacking them vertically. This horizontal merging allows both magnets to maintain adequate size for sufficient audio output while the overall speaker volume is reduced through optimized spatial arrangement.
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 achieves a slim, efficient speaker with improved sound quality by clearly distinguishing between high-pitched and low-pitched tones and preventing sound dampening, resulting in enhanced audio output and reduced size.
Implementation Method 1
a vibration plate (31) operated by a voice coil (35) and a magnet (14)
Implementation Method 2
a second vibration plate (31) operated by a voice coil (35) and a magnet (14)
Data Source
AI summary
Disclosed is a crossover double speaker having a small speaker and a large speaker on the upper side and on the lower side thereof. The crossover double speaker includes a cover integrally formed on the outer circumference of a flange of the yoke; a frame disposed below the cover; a first speaker unit including a first magnet disposed in a first speaker space, a first vibration plate arranged over the first magnet, and a first voice coil inserted into a first air gap; and a second speaker unit including a second magnet disposed in a second speaker space, a second vibration plate arranged between the yoke and the frame, and a second voice coil inserted into a second air gap. The yoke has sound release holes to output the sound generated from the second speaker unit in the direction of the first speaker unit.