Loudspeaker

Abstract

The invention is about a loudspeaker, comprising a basin-shaped base, the central part of which is arranged with a through hole that extends toward bottom surface of the base to form a shaft tube; a concave lower lid which is provided at bottom end of the shaft tube of the base and the external side surface of which is separated from the inner wall of the shaft tube of the base for a predetermined distance to form an annular space there-between; a coupled voice coil contained within the annular space; a magnet contained within the lower lid; a round sheet pole piece mounted on one end of the magnet, near to the central part of the base; a voice coil suspended around the pole piece; a vibration film which is provided above two sides of the voice coil and fixedly connected with it to move; and a front lid which is buckle-fixed at the end of the base and separated from the vibration film for certain distance. Thereby, a loudspeaker with good coupling sensitivity of magnetic filed may be provided.

Description

technical field [0001] The invention relates to a loudspeaker, in particular to a loudspeaker with a coupling coil and a magnetic field coupling sensitivity [0002] good speaker. Background technique [0003] In recent years, along with the miniaturization of audiovisual products such as various digital electronic products, hearing aids, and earphones, the requirements for thinner, smaller, and lighter speakers mounted on these products have been increasing. At the same time, due to the expansion of the dynamic range of the output signal (signal is the signal, hereinafter referred to as the signal) of these products, the loudspeaker is also required to have a larger output volume. [0004] see figure 1 Shown is a cross-sectional view of a thin speaker in the prior art. The loudspeaker 1 is composed of the following components: a pot-shaped yoke 110, a through hole is arranged in the center of the yoke 110, and the through hole extends to the bottom surface of the yoke 11...

AI Technical Summary

Problems solved by technology

Such a design mainly uses the coupling coil 180 to assist in enhancing the magnetic flux of the magnet 160 to increase the output volume of the speaker 1, but this design has the following defects: one, the coupling coil 180 is in contact with the external environment, and the coupling coil 180 Wires are more likely to be damaged and disconnected due to external factors such as friction or corrosion; 2. In order to accommodate the coupling coil 180, the bottom of the yoke plastic 110 needs to have a larger volume, which is not conducive to the volume reduction of the speaker 1; 3. The coupling coil 180 and the magnet 160 The distance between them is far away, and the magnetic field coupling sensitivity between the two is poor

However, this design also has the following design deficiencies: 1. The coupling coil 380 is located between the vibrating membrane 330 and the front cover 320, which somewhat limits the vibration space of the vibrating membrane 330, and even when the vibration amplitude of the vibrating membrane 330 is large, The vibrating membrane 330 will collide with the coupling coil 380. Since the vibrating membrane 330 is usually made of light and thin material to improve the vibration sensitivity, the physical structure of this material is low, and the collision with the coupling coil 380 will cause damage to the surface material of the vibrating membrane 330. As a result, the sound quality deteriorates, which also reduces the service life of the loudspeaker 2; two, the thickness of the coupling coil 380 is very thin, it is not easy to process and manufacture, and the production cost is high; three, the thickness of the coupling coil 380 is very thin, and the number of turns of the coil is very small. Low, the magnetic field strength generated by the electromagnetic coil is related to the number of turns of the coil. The higher the number of turns, the higher the magnetic field strength that the coil can add. The magnetic field coupling sensitivity between 360 and coupling coil 380 is relatively poor; 4. The coupling coil 380 needs to be separated from the vibrating membrane 330 by a certain distance, and the front cover 320 needs to design an additional holding mechanism to fix the coupling coil 380, and this distance is also required during assembly. detection, so the assembly is more cumbersome and difficult to make

[0010] This shows that above-mentioned existing loudspeaker obviously still has inconvenience and defect in structure and use, and demands urgently further improving

In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but for a long time no suitable design has been developed, and the general product has no suitable structure to solve the above-mentioned problems. This is obviously the relevant industry. Urgent problem

Images