Speaker structure
Our most common electric cone speaker. Electric cone speakers used to be called paper cone speakers. Although the diaphragm is still dominated by paper cones, many polymer material diaphragms and metal diaphragms have appeared at the same time. The name of the cone speaker is worthy of the name. NS. The cone loudspeaker is generally composed of three major parts: magnetic circuit system (permanent magnet, core column, magnetic conductive plate), vibration system (paper cone, voice coil), and support auxiliary system (centering support piece, cone frame, cushion edge), etc. Partial composition.
1. Voice coil: The voice coil is the drive unit of the cone-shaped paper cone speaker. It is wound on the paper tube in two layers with very thin copper wires, usually dozens of turns, placed on the magnetic core column and the magnetic conductive core. In the magnetic gap formed by the plate. The voice coil and the paper cone are fixed together. When the sound current signal passes through the voice coil, the vibration of the voice coil drives the paper cone to vibrate.
2. Paper cone: There are many kinds of materials used in the cone diaphragm of the cone cone speaker, and there are generally two types of natural fiber and man-made fiber. Natural fibers often use cotton, wood, wool, spun silk, etc., while man-made fibers have just used rayon, nylon, and glass fibers. Since the paper cone is the sound radiating device of the loudspeaker, it determines the sound reproduction performance of the loudspeaker to a large extent. Therefore, no matter which kind of paper cone, it is required to be light and rigid, and not deformed due to changes in ambient temperature and humidity. .
3. Folding ring: The folding ring is designed to ensure the paper cone moves along the axial direction of the speaker and restrict the lateral movement, and at the same time it plays the role of blocking the air flow between the front and the back of the paper cone. In addition to the commonly used paper cone materials, the material of the folding ring also uses plastic, natural rubber, etc., to be bonded to the paper cone through hot pressing.
4. Centering support piece: The centering support piece is used to support the joint part of the voice coil and the paper cone to ensure that it is vertical and not skewed. There are many concentric rings on the centering support piece, so that the voice coil can move up and down freely in the magnetic gap without moving laterally, so as to ensure that the voice coil does not collide with the magnetic conductive plate. The dust cover on the centering support piece is to prevent external dust from falling into the magnetic gap, to avoid friction between dust and the voice coil, and abnormal sound from the speaker.
