Diaphragm for sound converter
A conversion device, vibrating plate technology, applied in the direction of flat diaphragm, sensor, electrical components, etc., can solve the problems of low frequency band acoustic characteristics, limited acoustic characteristics, large total harmonic distortion rate, etc., to prevent split vibration, The effect of improving sound characteristics and realizing miniaturization
Inactive Publication Date: 2014-12-03
EM TECHNOLOGY CO LTD
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] At present, the vibration plate used in micro-speakers is mainly made of a single film of PE or PP series. According to the film characteristics of PE or PP series, its elasticity is low and rigidity is high, although it can meet the requirements of medium / high frequency frequency band Acoustic characteristics, but the sound pressure level (SPL) and acoustic characteristics of the low-frequency band are low. In order to improve the acoustic characteristics of the low-frequency band, in the case of using a thin diaphragm with low rigidity, the displacement in the low-frequency band becomes larger. Improve the sound pressure level of the low frequency band, but because of the thin thickness, split vibration occurs in a specific frequency band, and sound distortion occurs due to the split vibration, so it has the disadvantage of increasing the total harmonic distortion (THD)
Moreover, the existing micro-speakers are only tuned by the shape and thickness of the vibration plate formed by a single PE or single PP series film, which has limitations in improving the acoustic characteristics.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0048] figure 1 is a cross-sectional view of a vibration plate for an acoustic conversion device according to a first embodiment of the present invention, figure 2 It is a perspective view of a vibration plate for an acoustic conversion device according to a first embodiment of the present invention.
[0049] The diaphragm for an acoustic transducer according to the first embodiment of the present invention includes a central diaphragm 100 , side diaphragms 200 , and a voice coil 300 . The central diaphragm 100 is made of a 50-100 μm thermoplastic film, and includes an attachment portion 110 attached to the side diaphragm 200 and a central dome portion 120 that generates sound. The side vibrating plate 200 is a composite type plate manufactured by welding polyethylene (PE) or polypropylene (PP) to thermoplastic polyurethane (TPU). Its specific shape may be slightly different, but it is roughly round with a central part. It is ring-shaped and includes an inner edge portion 2...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present invention provides a diaphragm for a sound converter which can improve middle and high range sound characteristics by increasing rigidity of a center part of a diaphragm and reducing the weight of the diaphragm. The diaphragm for the sound converter of the present invention comprises: a side diaphragm of which a center is punctured; a center diaphragm of which an edge part is overlapped with the side diaphragm; and a voice coil provided on the overlapped part between the side diaphragm and the center diaphragm. The present invention comprises: a side vibration portion having a ring-shaped protrusion; a center vibration portion positioned inside the side vibration portion; and a voice coil provided between the side vibration portion and the center vibration portion, the side vibration portion and the center vibration portion being formed with different materials.
Description
technical field [0001] An object of the present invention is to provide a diaphragm for an acoustic transducer capable of improving mid-range and high-frequency acoustic characteristics by increasing the rigidity of the central portion of the diaphragm and reducing the weight. [0002] The present invention provides a vibrating plate for an acoustic conversion device, which is characterized in that it comprises a side vibrating plate, the central part of which is in a penetrating state; a central vibrating plate, which covers the penetrating part of the side vibrating plate, and the edge part overlaps with the side vibrating plate; And, the voice coil is mounted on the overlapping portion of the side diaphragm and the central diaphragm. Background technique [0003] At present, the vibration plate used in micro-speakers is mainly made of a single film of PE or PP series. According to the film characteristics of PE or PP series, its elasticity is low and rigidity is high, alt...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04R7/04H04R9/04
CPCH04R7/06H04R9/045
Inventor 郑承奎权重鹤金志勋
Owner EM TECHNOLOGY CO LTD