1. Magnetic circuit system (permanent magnet, stem
2. Vibration system (diaphragm, voice coil).
3. Supporting auxiliary system (centering bracket, basin frame, edge pad, terminal board).
The detailed introduction of the above three systems:
1. Voice coil: The voice coil is the drive unit speaker of the cone cone. Wrap two layers (four layers) (paper tube/aluminum sheet/film etc.) around the bone with very thin copper wire (copper wire/aluminum wire). Generally, it is wound dozens of times and placed in the magnetic gap formed by the magnetic core column and the magnetic conductive plate. The voice coil is fixed with the paper cone. When the acoustic current signal enters the voice coil, the vibration of the voice coil drives the paper cone to vibrate.
2. Paper cone (drum paper): There are many kinds of materials used for the cone diaphragm of cone cone speakers, and there are generally two categories: fibers and man-made fibers. Fiber commonly used cotton, wood, wool, silk and so on. , and man-made fibers only use rayon, nylon, glass fiber, etc. Since the paper cone is the sound radiating device of the speaker, it determines the sound reproduction performance of the speaker to a considerable extent, so no matter what kind of paper cone, it is required to be light and rigid, and cannot be deformed due to changes in ambient temperature and humidity.
3. Folding ring (edge flange): The setting of the folding ring is to ensure the axial movement of the paper cone along the speaker and limit the lateral movement, and at the same time play the role of blocking the circulation of the paper cone. In addition to the commonly used paper cone materials, the folding ring materials also include plastics, rubbers, etc. They are glued to the paper cone by thermocompression.
4. The rigidity or flexibility formed by the suspension edge and elastic wave will affect the moving speed of the cone. For the total flexibility of the horn, elastic waves provide about 80% and the overhanging edges provide about 20%. The overhanging edge has two functions. Its job is to keep the voice coil centered in the pole piece gap. However,
5. For the vibration modes of the cone edge, the damping effect caused by the overhanging edge is very important. The thickness and material selection of the cantilever edge greatly changes the response of the horn. The ability of the cone distortion phenomenon to dampen and prevent sound waves from reflecting off the back of the cone can change the combination of amplitude and phase of the distortion mode, making it an integral part of the cone and a responsive tool.
6. Centering piece (elastic wave): The centering piece is used to support the connection between the voice coil and the paper cone to ensure that the vertical is not skewed. There are many concentric rings on the centering support sheet, so that the voice coil can move up and down freely in the magnetic gap without lateral movement, so as to ensure that the voice coil does not collide with the magnetic conducting plate. The dust cover on the stator is to prevent external dust from falling into the magnetic gap and avoid dust from rubbing against the voice coil, thereby causing abnormal noise in the speaker.
