Mindray PM7000 Patient Monitor Speaker HOPSUN 0.5W

► Brief Introduction

A speaker is an electroacoustic device that converts electrical signals into sound, and is an important piece of equipment in an audio system. As one of the electro-acoustic transducers that convert electrical energy into sound energy, the quality and characteristics of the speaker play a decisive role in the sound quality of the entire audio system

The general loudspeaker is composed of: magnet, frame, centering piece, molded ring cone paper cone.

The cone-shaped paper cone speaker is generally composed of three major components: the magnetic circuit system (permanent magnet, core column, magnetic plate), the vibration system (paper cone, voice coil) and the supporting auxiliary system (centering piece, basin frame, edge pad). Partial composition.

• 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. Generally, there are dozens of turns, also known as coils, placed between the magnetic core and the In the magnetic gap formed by the magnetic 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.

• Paper cone: There are many kinds of materials used for the cone diaphragm of the cone cone speaker, generally there are two categories: natural fiber and man-made fiber. Natural fibers often use cotton, wood, wool, spun silk, etc., while artificial fibers use rayon, nylon, glass fiber, etc. Since the paper cone is the sound radiation 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 in weight and good in rigidity, and cannot be deformed due to changes in ambient temperature and humidity. .

• Surrounding ring: The folding ring is set to ensure the axial movement of the paper cone along the speaker and limit the lateral movement, and at the same time, it plays a role in blocking the circulation of the space between the front and rear of the paper cone. The material of the ring is not only the material of the commonly used paper cone, but also plastic, natural rubber, etc., which are bonded to the paper cone by hot pressing.

• 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 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 plate. The dust cover on the centering strut is to prevent the external dust from falling into the magnetic gap, avoiding the friction between the dust and the voice coil, which will cause the speaker to produce abnormal sound.
• The dustproof cap is a nearly hemispherical plastic sheet that covers the center of the speaker's paper film, and its function is to prevent dust from entering the speaker and causing damage.

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