CN214707976U

CN214707976U - Micro speaker module

Info

Publication number: CN214707976U
Application number: CN202121351356.1U
Authority: CN
Inventors: 魏鹏江; 张圆媛
Original assignee: Merry Technology Suzhou Co Ltd
Current assignee: Merry Technology Suzhou Co Ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2021-11-12
Anticipated expiration: 2031-06-17
Also published as: TWM628849U

Abstract

The application discloses miniature speaker module contains first casing, second casing, top cap, vibrating diaphragm subassembly and sound outlet paster. The first shell is provided with a first accommodating space. The second shell is arranged above the first shell and provided with a second accommodating space and a sound guide tube, the second accommodating space corresponds to the first accommodating space of the first shell, and the second accommodating space extends to the sound guide tube. The top cover is arranged above the second shell to cover the second accommodating space. The vibrating diaphragm assembly is clamped between the first accommodating space of the first shell and the second accommodating space of the second shell. The sound outlet patch is arranged at the outlet of the sound guide tube. The performance of the micro-speaker module in a high-frequency section is optimized through the arrangement of the sound outlet patch.

Description

Micro speaker module

Technical Field

The application relates to the technical field of speaker modules, in particular to a miniature speaker module.

Background

With the popularization of mobile networks and the vigorous development of portable devices, various video streaming services are also available as in spring. Limited by the inherent structural design, portable devices have difficulty providing acoustic effects to users on the order of cinema or home sound with a thin and light volume.

The excellent acoustic effect is usually evaluated and requested for a high frequency and a low frequency of three frequencies, such as a high frequency, a medium frequency, and a low frequency expression is more noticeable to a low frequency expression in terms of the hearing sensation of a general user, so many speakers mounted on portable devices are attracting consumers' attention with the low frequency expression as a request.

Only with the development of high-resolution music in recent years, consumers have turned their attention to the high-frequency performance of speakers, but portable devices do not have extra space for designing an acoustic resonant cavity in a limited volume space.

In view of the above, it is an urgent need in the art to provide a micro speaker module that can provide excellent high frequency performance to a user while maintaining a thin and light weight and without affecting the overall design of a portable device.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a micro speaker module, which is used for solving the problem that the existing micro speaker module is limited by the overall design of a portable device and cannot be configured with an additional space to form an acoustic resonant cavity, so that the existing micro speaker module has defects in high-frequency performance.

In order to solve the technical problem, the present application is implemented as follows:

there is provided a micro-speaker module comprising: a first housing having a first receiving space;

the second shell is assembled with the first shell and provided with a second accommodating space and a sound guide pipe, the second accommodating space corresponds to the first accommodating space of the first shell, and the second accommodating space extends to the sound guide pipe; the vibrating diaphragm assembly is positioned between the first accommodating space of the first shell and the second accommodating space of the second shell; the sound outlet patch is arranged at the sound guide pipe outlet of the sound guide pipe; wherein, the sound outlet of the sound outlet patch is provided with a sound outlet area, the sound guide tube outlet of the sound guide tube is provided with a sound guide tube outlet area, and the sound outlet area is smaller than the sound guide tube outlet area.

In the micro speaker module of the present application, the sound outlet area is 0.25 to 0.5 times the outlet area of the sound guide tube.

In the micro speaker module of the present application, the sound guiding tube is in the shape of a long strip tube, and one end of the communicating second accommodating space is in a bent configuration, and the other end extends outward to form an outlet of the sound guiding tube.

In the micro speaker module of the present application, the sound outlet of the sound outlet patch is a transverse opening or a longitudinal opening.

In the micro speaker module of the present application, the sound outlet patch is fixed to the sound guide tube outlet of the sound guide tube in a fitting manner.

In the micro speaker module of this application, the material of sound outlet paster is plastics or silica gel.

In the micro speaker module of the present application, when the diaphragm assembly is clamped between the first accommodating space of the first housing and the second accommodating space of the second housing, the diaphragm assembly and the first accommodating space of the first housing are used for forming an acoustic back cavity.

In the micro speaker module of the present application, the top cover further includes an opening on an outer side surface of the second housing, the opening is communicated with the second accommodating space, and the top cover is disposed on an outer side of the second housing and covers the opening.

In the micro speaker module of the present application, the diaphragm assembly is clamped between the first accommodating space of the first housing and the second accommodating space of the second housing, the second accommodating space of the diaphragm assembly and the second housing and the top cover are used for forming an acoustic front cavity, and the acoustic front cavity is communicated with the sound guide tube.

In the micro speaker module of the present application, the end of the sound guiding tube connected to the second receiving space is curved, and the other end extends outward to form an outlet of the sound guiding tube.

In the embodiment of the application, the sound outlet patch is arranged, so that the sound outlet area of the sound outlet patch is smaller than the sound guide pipe outlet area of the sound guide pipe outlet, and the corresponding acoustic load can be increased when the sound outlet area is reduced, thereby optimizing the performance of the micro-speaker module in a high-frequency section.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a perspective view of a micro-speaker module according to the present application.

Fig. 2 is an exploded view of a micro-speaker module according to the present application.

Fig. 3 is a schematic view of a micro-speaker module according to the present application without a top cover.

Fig. 4 is a rear view of a second housing of a micro-speaker module according to the present application.

Fig. 5 is a perspective view of another embodiment of a micro-speaker module according to the present application.

Fig. 6 is a graph comparing frequency responses of the micro-speaker module of the present application and a conventional micro-speaker module.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1 and fig. 2, a micro-speaker module 100 according to the present disclosure includes a first housing 110, a second housing 120, a top cover 130, a diaphragm assembly 140, and a sound outlet patch 150. As shown in fig. 2, the first housing 110 has a first accommodating space 112. The second housing 120 is assembled over the first housing 110. The second housing 120 has a second accommodating space 122 and a sound guiding tube 124, the second accommodating space 122 corresponds to the first accommodating space 112 of the first housing 110, and as shown in fig. 4, the second accommodating space 122 extends to the sound guiding tube 124. Referring to fig. 2 again, the outer side surface of the second housing 120 has an opening 126, the opening 126 is communicated with the second accommodating space 122, and the top cover 130 is disposed outside the second housing 120 and covers the opening 126. The diaphragm assembly 140 is sandwiched between the first accommodating space 112 of the first housing 110 and the second accommodating space 122 of the second housing 120. Sound outlet patch 150 is provided at sound guide tube outlet 124a of sound guide tube 124.

In the present embodiment, the sound guiding tube 124 is in a long tube shape, and one end of the sound guiding tube 124 communicating with the second accommodating space 122 is disposed in a bent manner, and the other end of the sound guiding tube extends outward to form a sound guiding tube outlet 124a, and the sound outlet end of the sound guiding tube 124 is parallel to the outer surface of the second housing 120. In addition, it should be further described that the diaphragm assembly 140 includes a voice coil, an upper pole piece, a lower pole piece, a magnet, and other assemblies, and the structure of the diaphragm assembly 140 is a conventional structure capable of generating sound by magnetic operation, and therefore, detailed description thereof is omitted here.

In detail, referring to fig. 2 and fig. 4, since one end of the sound guiding tube 124, which is communicated with the second accommodating space 122, is partially bent upward, the communicating portion between the second casing 120 and the sound guiding tube 124 correspondingly has a through hole 128 which is arranged downward in an inclined plane shape. In other words, the second casing 120 is connected to the partially bent end of the sound guiding tube 124 through the through hole 128 disposed downward in an inclined shape, so that the second accommodating space 122 of the second casing 120 can extend to the sound guiding tube 124 and communicate with the sound guiding tube outlet 124a of the sound guiding tube 124, thereby having an effect of transmitting the acoustic load (i.e., sound pressure) generated when the diaphragm assembly 140 vibrates to the sound guiding tube outlet 124a of the sound guiding tube 124.

Referring to fig. 2 again, in the micro-speaker module 100 of the present application, the sound outlet 152 of the sound outlet patch 150 has a sound outlet area a1, the sound guiding tube outlet 124a of the sound guiding tube 124 has a sound guiding tube outlet area a2, and the sound outlet area a1 is smaller than the sound guiding tube outlet area a 2. Through the special arrangement that the sound outlet area a1 is smaller than the sound guide outlet area a2, after the acoustic load generated by the vibration of the diaphragm assembly 140 is transferred to the sound guide outlet 124a of the sound guide 124, it will be blocked by the sound outlet patch 150, so as to increase the acoustic load correspondingly outputted from the sound outlet 152, and as shown in fig. 6, the low frequency sensitivity portion has substantially no influence, the mid frequency sensitivity portion is increased from 3kHz to 4.2kHz, the mid frequency sensitivity portion is slightly decreased from 4.5kHz to 5kHz, but the high frequency sensitivity portion is significantly increased, so that the performance of the micro-speaker module 100 of the present application in the high frequency region can be significantly optimized.

In a preferred embodiment of the present application, the sound outlet area a1 is 0.25-0.5 times the sound guide outlet area a 2. In addition, as shown in fig. 1-3, the sound outlet 152 of the sound outlet patch 150 may be a transverse opening, or as shown in fig. 5, the sound outlet 152 of the sound outlet patch 150 may be a longitudinal opening, but not limited thereto.

It should be further noted that the shape of the sound outlet 152 may be, but not limited to, a rectangular opening as shown in fig. 1-3, and may also be other openings, such as a triangular opening, a circular opening or a polygonal opening …, depending on the experimental tests of the manufacturer, and only the behavior of the high frequency section as shown in fig. 6 is required to be considered as the protection scope of the present application.

In addition, in the micro speaker module 100 of the present application, the sound outlet patch 150 is fixed to the sound guide tube outlet 124a of the sound guide tube 124 in a bonding manner, and the sound outlet patch 150 is made of plastic or silica gel, so that the sound outlet patch 150 has a certain elastic force, and can generate resonance and sound blocking effects during sound outputting. Therefore, the additional sound outlet patch 150 does not need to be assembled to the sound guide tube outlet 124a of the sound guide tube 124 through an additional structure, and the sound outlet patch 150 is only made of light and thin plastic or silica gel, so that the whole design of the original portable device is not affected, and the original portable device can be directly assembled, thereby reducing the design cost and avoiding the problem of changing the original structure.

Referring to fig. 2 and 3, in the micro-speaker module 100 of the present application, when the diaphragm assembly 140 is sandwiched between the first accommodating space 112 of the first housing 110 and the second accommodating space 122 of the second housing 120, the diaphragm assembly 140 and the first accommodating space 112 of the first housing 110 located below are used to form an acoustic back cavity (not shown). When the diaphragm assembly 140 is sandwiched between the first accommodating space 112 of the first casing 110 and the second accommodating space 122 of the second casing 120, the diaphragm assembly 140, the second accommodating space 122 of the second casing 120, and the top cover 130 are used to form an acoustic front cavity (not shown). Through the above arrangement, the vibration generated by the diaphragm assembly 140 can output a corresponding high-frequency effect and a corresponding low-frequency effect between the acoustic front cavity and the acoustic back cavity.

As shown in fig. 4, since the second accommodating space 122 of the second casing 120 is communicated to the sound guide tube 124 through the through hole 128 disposed downward in an inclined shape, when the diaphragm assembly 140, the second accommodating space 122 and the top cover 130 form an acoustic front cavity, the acoustic front cavity is communicated to the sound guide tube outlet 124a of the sound guide tube 124 through the through hole 128.

In summary, the micro-speaker module 100 of the present application is configured such that the sound outlet area a1 of the sound outlet patch 150 is smaller than the sound guide outlet area a2 of the sound guide outlet 124a through the sound outlet patch 150, thereby increasing the acoustic load correspondingly outputted from the sound outlet 152, and optimizing the performance of the micro-speaker module in the high frequency range. In addition, the additional sound outlet patch 150 can be attached to the sound guide tube outlet 124a of the sound guide tube 124 without additional structural design, and the sound outlet patch 150 is only made of light and thin plastic or silica gel, so that the whole design of the original portable device is not affected, and the original portable device can be directly assembled by using the design of the original portable device.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

While the present embodiments have been described with reference to the accompanying drawings, the present embodiments are not limited to the above embodiments, which are merely illustrative and not restrictive, and those skilled in the art can now make various changes and modifications without departing from the spirit and scope of the present invention.

Claims

1. A micro-speaker module, comprising:

a first housing having a first receiving space;

the second shell is assembled with the first shell and provided with a second accommodating space and a sound guide pipe, the second accommodating space corresponds to the first accommodating space of the first shell, and the second accommodating space extends to the sound guide pipe;

the vibrating diaphragm assembly is positioned between the first accommodating space of the first shell and the second accommodating space of the second shell; and

the sound outlet patch is arranged at the sound guide pipe outlet of the sound guide pipe;

the sound outlet of the sound outlet patch is provided with a sound outlet area, the sound guide tube outlet of the sound guide tube is provided with a sound guide tube outlet area, and the sound outlet area is smaller than the sound guide tube outlet area.

2. The micro-speaker module as claimed in claim 1, wherein the sound outlet area is 0.25 to 0.5 times the outlet area of the sound guide tube.

3. The micro-speaker module as claimed in claim 1, wherein the sound guide tube is in the shape of a long tube, and one end of the sound guide tube communicating with the second receiving space is curved, and the other end of the sound guide tube extends outwards to form the sound guide tube outlet.

4. The micro-speaker module as recited in claim 1, wherein the sound outlet of the sound outlet patch is a lateral opening or a longitudinal opening.

5. The micro-speaker module as recited in claim 1, wherein the sound outlet patch is secured to the sound guide tube outlet of the sound guide tube in a snug manner.

6. The micro-speaker module as recited in claim 1, wherein the sound outlet patch is made of plastic or silicone.

7. The micro-speaker module as recited in claim 1, wherein the diaphragm assembly is interposed between the first receiving space of the first housing and the second receiving space of the second housing, and the diaphragm assembly and the first receiving space of the first housing are configured to form an acoustic back cavity.

8. The micro-speaker module as claimed in claim 1, further comprising a top cover, wherein an opening is formed on an outer side surface of the second housing, the opening is communicated with the second receiving space, and the top cover is disposed on an outer side of the second housing and covers the opening.

9. The module of claim 8, wherein the diaphragm assembly is sandwiched between the first receiving space of the first housing and the second receiving space of the second housing, and the diaphragm assembly, the second receiving space of the second housing, and the top cover are configured to form an acoustic front cavity, and the acoustic front cavity is communicated with the sound guide tube.

10. The micro-speaker module as claimed in claim 1, wherein one end of the sound guide tube connected to the second receiving space is bent, and the other end extends outward to form the outlet of the sound guide tube.