Techniques, methods and devices known to those ordinarily skilled in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and devices should be regarded as part of the authorized description.

In all the examples shown and discussed herein, any specific value should be interpreted as exemplary only and not as a limitation. Thus, other examples of the exemplary embodiment can have different values.

It should be noted that similar reference numerals and letters denote similar items in the following figures, and therefore, once a certain item is defined in one figure, it is not necessary to further discuss it in the following figures.

Referring to FIG. 1, an embodiment of the present disclosure provides an ultra-thin speaker. The ultra-thin speaker includes a housing 1, a magnetic circuit system, a vibration system and a dust cap assembly. The magnetic circuit system is disposed in the housing 1, the magnetic circuit system is used to generate a magnetic field, the vibration system includes a cone assembly 2 and a voice coil 3, and the cone assembly has a taper of less than or equal to 25°. In a more preferred solution, the taper of the cone assembly 2 can be made less than 15°, that is, a shape of the cone assembly 2 is close to a flat board, which is conducive to the overall ultra-thin design of the speaker structure. Alternatively, a height of the ultra-thin speaker can be made less than or equal to 10 mm by designing a dimension of the housing 1 and a structure of the cone assembly 2.