Speaker module

The present disclosure provides a speaker module, in which at least two leaking holes that communicate with a rear chamber of the housing, and a connecting groove that communicates any two of the at least two leaking holes with each other are arranged at the housing. With such configuration, the processing steps for forming the cone-shaped leaking hole and the air guiding groove are omitted, the processing is significantly simplified compared to the prior art, the processing is much easier and the manufacture efficiency is higher, and an excellent performance in air leakage and pure sounding is guaranteed.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application claims priority to Chinese Patent Application No. 201820655641.4, filed on May 4, 2018, the content of which is incorporated herein by reference in its entirety.

TECHNICAL FIELD

The present disclosure relates to the field of electroacoustic conversion and, in particular, to a speaker module.

BACKGROUND

With the advent of mobile internet, upgrading of electronic products is getting quicker and quicker, and people have higher and higher requirements on performance of the electronic products in various aspects. High quality music function is one of the various aspects. As a result, the electroacoustic system needs to be continuously improved. A high quality speaker module is one of the essential parts to realize the high quality music function.

A speaker module generally includes a housing and a speaker accommodated in the housing. During assembling of the speaker module, the speaker is installed first, then a damping sheet is attached to seal the housing, so as to accomplish the assembling process. In order to balance an internal pressure and an external pressure of the speaker module, a leaking structure is usually arranged on the housing for balancing the air pressure. In order to avoid failure of the leaking structure caused by shielding, in the prior art, the leaking structure generally includes a cone-shaped leaking hole with a decreasing diameter from inside to outside at the bottom of the housing, and an air guiding groove that is provided within the housing and in communication with the leaking hole. However, involved processing steps are complicated and the manufacture efficiency is low.

Therefore, it is necessary to provide a new speaker module to solve the above problem.

DESCRIPTION OF EMBODIMENTS

The present disclosure will be further illustrated with reference to the drawings.

As shown inFIGS. 1-3, the present disclosure provides a speaker module100, including a housing1having an accommodating space and a speaker2accommodated in the housing1.

The housing1includes a bottom wall11and a side wall12, and the bottom wall11and the side wall12together enclose the accommodating space. The side wall12is bent with respect to the bottom wall11and extends from the bottom wall11, and the side wall12connects end to end and surrounds the accommodating space. The bottom wall11includes an inner surface111within the speaker module and an outer surface112outside the speaker module. A speaker fixing groove13for fixing the speaker2is provided on the inner surface111.

In one embodiment, the speaker2is an electromagnetic speaker including a diaphragm and a coil for driving the diaphragm to vibrate. The speaker2is installed with its diaphragm side located within the speaker fixing groove13. The speaker2, especially the diaphragm of the speaker2partitions the accommodating space into a front chamber and a rear chamber. The speaker2and the speaker fixing groove13form the front chamber therebetween to achieve sounding of the speaker module. The speaker2and the housing form the rear chamber therebetween to increase low frequency response and to significantly reduce F0. A sound outlet121that communicates the front chamber with the external environment is provided in the side wall12of the housing1. It is to be understood that the speaker2may be otherwise other types of sounding devices with the same principles as described herein. In one embodiment, the speaker module100further includes a cover plate3covering on the housing1, and the cover plate3covers on the side wall12and is sealed with the housing1. In an alternative embodiment, the cover plate3is not present, then the speaker module100can be directly installed on an external installation surface, e.g., a flat surface such as a mainboard or a housing of an electronic product, and the implementation principle is similar to the embodiment having the cover plate.

Since the housing1is fitted with the cover plate3or the external installation surface and is sealed thereto, a sealed space is formed within the housing1. Due to the influence from environment alternation, the internal pressure and the external pressure may not be uniform, affecting the reliability of the product. In view of this, in one embodiment, a base14protruding towards the accommodating space is arranged on the inner surface111of the housing1, and the base14has at least two leaking holes141successively penetrating through both the housing and the base. The hole diameter of the leaking hole141gradually decreases from a side of the base14facing away from the inner surface111to the outer surface112. In one embodiment, a maximum hole diameter of the leaking hole is 0.17 mm-0.23 mm. The leaking hole141communicates with the rear chamber to achieve leakage of the rear chamber, thereby providing balanced internal pressure and external pressure, and thus guaranteeing the acoustic performance.

In addition, an air guiding groove142that is connected to one leaking hole141and a connecting groove143that communicates with any two leaking holes141are further provided on the side of the base14facing away from the inner surface111. In one embodiment, the speaker module1has two leaking holes141in total, and the two leaking holes141have the same shape and the same size. It is to be understood that the number of the leaking holes may be more than two, and their structures are not limited herein. The air guiding groove142and the leaking hole141are in one-to-one correspondence, and each air guiding groove142extends from one leaking hole141to the periphery of the base14to achieve leakage. The connecting groove143is provided between two adjacent leaking holes141. In one embodiment, the air guiding groove142and the connecting groove143have the same depth and the same structure. A thickness between a bottom surface of either the air guiding groove142or the connecting groove143and the surface of the base14is smaller than a thickness of the housing. Either the air guiding groove142or the connecting groove143is formed by the bottom surface thereof and a circumferential surface surrounding the bottom surface. A thickness between the bottom surface of the groove and the outer surface112of the housing is smaller than a thickness between any other portion of the base14to the outer surface112. Thanks to the air guiding groove142and the connecting groove143, blocking of the leaking hole can be avoided to guarantee reliability of the product.

Furthermore, a damping sheet4for dust-proof is further provided and covers the side of the base14facing away from the inner surface111. The damping sheet4covers the leaking hole141, the air guiding groove142and the connecting groove143, and the damping sheet4can be a PET or a mesh Therefore, in the condition that the overall dust-proof and sealing function is guaranteed, multiple leaking holes141and air guiding grooves142are provided, and the multiple leaking holes141are communicated with each other by the connecting grooves143, the problem of poor leakage caused by blocking of the leaking holes141can be avoided, thereby guaranteeing excellent performance of the speaker module in air leakage and pure sounding.

As shown inFIG. 3, in one embodiment, a flow guiding groove15is provided at the outer surface112, the flow guiding groove14is recessed from the outer surface112towards the inner surface. The flow guiding groove15surrounds the leaking hole141, and the leaking hole141penetrates through the housing1and the base14via the flow guiding groove15. Therefore, air can be discharged quickly, and the outlet of the leaking hole141will not be blocked, meanwhile blocking of the leaking hole141when the outer surface112is attached to other objects can also be avoided.

In the present disclosure, the housing is provided with at least two leaking holes communicating with the rear chamber, air guiding grooves that connect the leaking holes with the external environment, and connecting grooves that communicates the leaking holes with each other, so that the processing steps for forming the cone-shaped leaking hole and air guiding groove in the prior art are omitted, the processing is significantly simplified compared to the prior art, the processing is much easier and the manufacture efficiency is higher, and an excellent performance in air leakage and pure sounding is guaranteed.

Although the embodiments of the present disclosure are described above, it is to be understood that, the above embodiments are exemplary, which shall not be interpreted as limitations to the present disclosure. Those skilled in the art could still make alternations, modifications, replacements and variations to the above embodiments within the scope of the present disclosure.