Speaker module

Abstract

Disclosed is a speaker module, comprising a module housing and a speaker unit accommodated in the module housing. The speaker unit partitions a module cavity encircled by the module housing into two cavities, namely a front acoustic cavity and a rear acoustic cavity. A separator component is provided within the rear acoustic cavity. The separator component partitions the rear acoustic cavity into an accommodating cavity and a sound-absorbing cavity. The sound-absorbing cavity is filled with sound-absorbing particles. An antistatic material is added into the housing material of the module housing at where the sound-absorbing cavity is located, or the antistatic material is coated on the surface of the module housing at where the sound-absorbing cavity is located, and the antistatic material is either an electrically-conductive material or an antistatic agent. The speaker module of the present invention is capable of greatly increasing the fill rate of the sound-absorbing particles in the sound-absorbing cavity of the rear acoustic cavity of the speaker module, thus allowing the space of the rear acoustic cavity of the speaker module to be fully utilized and the sound-absorbing particles to fully exert the effects thereof in improving the acoustic properties of the speaker module, and greatly increasing the acoustic properties of the speaker module.

Claims

1. A speaker module comprising a module housing and a speaker unit accommodated in the module housing, wherein the speaker unit separates a module cavity encircled by the module housing into two cavities, namely a front acoustic cavity and a rear acoustic cavity, and an insulating member is disposed in the rear acoustic cavity, the insulating member separates the rear acoustic cavity into an accommodating cavity and a sound absorbing cavity, and the sound absorbing cavity is filled with sound absorbing particles comprising a non-foaming sound absorbing material, wherein an antistatic material is coated on an inner surface of a portion of the module housing constituting the sound absorbing cavity, and the antistatic material is a conductive material or an antistatic agent, wherein a filling opening is disposed on the module housing at a position of the sound absorbing cavity for receiving the sound absorbing particles therethrough into the sound absorbing cavity, and the antistatic material is coated on the inner surface of the module housing corresponding to the filling opening.

2. The speaker module according to claim 1, wherein surfaces of the sound absorbing particles are coated with electric inductive metal films or sprayed with the antistatic agent.

3. The speaker module according to claim 2, wherein the material of the electric inductive metal film is one of a metal block polymer of polyether, glycerol-stearate or a derivative of ethylene oxide.

4. The speaker module according to claim 1, wherein surfaces of the sound absorbing particles are subjected to a polishing treatment and a powder falling rate wt % is ≤0.1.

5. The speaker module according to claim 1, wherein the conductive material is one or more of carbon black, metal and metal oxide.

6. The speaker module according to claim 1, wherein the antistatic agent is one or more of quaternary ammonium salts, phosphates, fatty acid esters, ammonium ethoxide, alkyl sulfonates and acrylic acid derivatives.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a structural schematic diagram of a speaker module according to a first embodiment of the present invention;

(2) FIG. 2 is a structural schematic diagram of a speaker module according to a second embodiment of the present invention;

REFERENCE NUMERAL

(3) 1: module housing; 2: front acoustic cavity; 3: rear acoustic cavity; 31: sound absorbing cavity; 32: sound absorbing particles; 33: filling opening; 4: insulating member; 5: antistatic material.

DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION

(4) In order to make the purposes, technical solutions and advantages of the present invention clear, the present invention will be further described in detail below in combination with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The First Embodiment

(5) Referring to FIG. 1, the speaker module according to the present embodiment comprises a module housing 1 and a speaker unit accommodated in the module housing 1. The speaker unit separates a module cavity encircled by the module housing into two cavities, namely a front acoustic cavity 2 and a rear acoustic cavity 3, and an insulating member 4 is disposed in the rear acoustic cavity 3, the insulating member 4 separates the rear acoustic cavity 3 into an accommodating cavity and a sound absorbing cavity 31, the sound absorbing cavity 31 is filled with sound absorbing particles 32, and a filling opening 33 is disposed on the module housing 1 at the position of the sound absorbing cavity 31, and an antistatic material is added into the housing material of a portion of the module housing 1 constituting the sound absorbing cavity 31. Preferably, the antistatic material may be added into the housing material of a portion of the module housing that corresponds to the portion provided with the filling opening 33, and the specific embodiment is not limited to FIG. 1. In the material of the portion of the module housing into which the antistatic material 5 is added, the antistatic material 5 is added in an amount of 0.1% to 10% by weight with respect to the housing material. Preferably, in the material of the portion of the module housing into which the antistatic material 5 is added, the antistatic material 5 is added in an amount of 0.1% to 5% by weight with respect to the housing material. By adding the antistatic material into the housing material of the portion of the module housing 1 corresponding to the filling opening 33, the electrostatic properties of the module housing can be improved, and the fill rate of the sound absorbing particles in the sound absorbing cavity and the package yield of the sound absorbing cavity can be greatly increased.

(6) Surfaces of the sound absorbing particles 32 are coated with electric inductive metal films or sprayed with an antistatic agent, so as to improve the surface conductivity of the sound absorbing particles 32 and enhance the antistatic property of the sound absorbing particles 32.

(7) The material of the electric inductive metal film is one of a metal block polymer of polyether, glycerol-stearate or a derivative of ethylene oxide.

(8) The surface of the sound absorbing particles is subjected to a polishing treatment and the powder falling rate wt % is ≤0.1, so that the particle wear rate, i.e., the powder falling rate (wt %) is ≤0.1, and the accumulation of electric charge due to the friction of the rough surface of the sound absorbing particles is reduced.

(9) The conductive material is one or more of carbon black, metal and metal oxide.

(10) The antistatic agent is one or more of quaternary ammonium salts, phosphates, fatty acid esters, ammonium ethoxide, alkyl sulfonates and acrylic acid derivatives.

The Second Embodiment

(11) Referring to FIG. 2, the structure of the speaker module of the present embodiment is substantially the same as that of the first embodiment, except that the antistatic material 5 is coated on the inner surface of the portion of the module housing 1 constituting the filling opening 33. Preferably, the antistatic material 5 may be coated on the inner surface of the portion of the module housing 1 corresponding to the filling opening 33. Such structure can increase the surface conductivity of the module housing 1, so that the surface resistance of the area coated with the antistatic material 5 is ≤10.sup.12Ω, thereby achieving the purpose of improving the electrostatic properties of the module housing 1.

(12) The above is examples of preferred embodiments of the present invention, and contents that are not described in detail are common knowledge to those skilled in the art. The scope of the present invention is defined by the appended claims, and any equivalent changes based on the technical enlightenment of the present invention are also within the scope of the present invention.