Moving coil type miniature transmitter and receiver

Abstract

The invention relates to a moving coil type miniature transmitter and receiver, which comprises a T-bar and a ring magnet arranged on the T-bar. A washer with a casing function simultaneously is arranged on the magnet, an external type magnetic path with a small gap and a long stroke is formed between the ring magnet and a center column of the T-bar, a sound film is arranged on the washer, and the lower portion of the sound film is provided with a high inductive voice resistance coil which is placed in the magnetic path. The moving coil type miniature transmitter and receiver has the advantages of having a voice transmitting and receiving functions simultaneously, small volume and good using effects.

Description

【Technical field】 [0001] The invention relates to a transmitter and receiver. 【Background technique】 [0002] At present, under normal conditions, the speaker can only be used as a single device with the function of transmitting or speaking. In acoustic applications, different devices must be used for transmitting and receiving, and for speaking, either as a microphone alone or as a speaker alone. On the one hand, the cost of materials is high. , On the other hand, there is a lot of assembly space, which affects the miniaturization of the device. [0003] 1. The characteristic parameter requirements of the dynamic speaker: [0004] 1. The dynamic speaker requires high sensitivity, light vibration system, good transient response, wide frequency band, and low low-frequency resonance frequency; [0005] 2. Small size, high power requirement. [0006] Second, the characteristic parameter requirements of the dynamic microphone: [0007] 1. The dynamic microphone requires high...

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Problems solved by technology

[0011] Difficulties: Because the voice coil has a large inductive resistance and a relatively heavy mass, the diaphragm cannot be selected to be too thin, which will inhibit the reception of speech. If a thin diaphragm is selected, the reception of speech is guaranteed, and the transmission is obtained due to the thin diaphragm and the weight of the coil. It is all low frequency, there is no middle and high frequency band with loud human voice, and the speaker of the receiver also needs high impedance, that is, high inductive reactance to drive the receiver, which also brings problems to production because the quality of the voice coil is too heavy and the diaphragm is too thin Seriously affect the product qualification rate

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