Miniature loudspeaker module and electronic equipment

Abstract

The utility model discloses a miniature loudspeaker module and electronic equipment, the miniature loudspeaker module comprises a loudspeaker monomer, a module shell and a sound absorption block, the loudspeaker monomer is installed in the module shell and divides the internal space of the module shell into a rear cavity and a front cavity; the sound absorption block is mounted in the rear cavity, and the sound absorption block is formed by pressing a plurality of base particles. The miniature loudspeaker module is simple and novel in structure, the sound-absorbing block formed by pressing the base particles is arranged in the rear cavity, and the sound-absorbing block can contain more base particles under the condition that the volume of the sound-absorbing block is the same as the size of a base particle filling space, that is, the volume of the sound-absorbing block equivalent to that of the rear cavity is larger, and the volume of the sound-absorbing block is smaller than that of the base particle filling space. Therefore, the resonant frequency F0 of the miniature loudspeaker module is reduced to a greater extent, and the low-frequency sensitivity SPL of the miniature loudspeaker module is improved to a greater extent.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic converters, in particular to a micro-speaker module and electronic equipment. Background Art

[0002] When the speaker unit of the micro-speaker module is finalized, the following methods can be used to improve the low-frequency sensitivity: increasing the volume of the back cavity, filling it with bass particles, and sticking sound-absorbing cotton. Filling it with bass particles and sticking sound-absorbing cotton are equivalent to increasing the volume of the back cavity, thereby reducing the resonance frequency F0 of the micro-speaker module, thereby improving the low-frequency sensitivity SPL of the micro-speaker module. Among them, the effect of reducing F0 by adding sound-absorbing cotton is not as good as the effect of filling it with bass particles.

[0003] However, there are large gaps between the bass particles in the rear cavity of the micro-speaker module, which results in a limited amount of bass particles that can be poured into the rear cavity of the micro-speaker module. Furthermore, there are slits in the rear cavity of some micro-speaker modules. When the slits are small, it will be difficult to pour bass particles into some areas of the rear cavity of the micro-speaker module. That is, the rear cavity of the existing micro-speaker module has not been fully utilized. Therefore, there is room for further improvement in the low-frequency sensitivity of the micro-speaker module. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a micro-speaker module with better low-frequency sensitivity, and an electronic device having the micro-speaker module.

[0005] In order to solve the above technical problems, the first technical solution adopted by the present invention is: a micro speaker module, comprising:

[0006] Speaker unit;

[0007] A module housing, wherein the speaker unit is installed in the module housing and the inner space of the module housing is divided into a rear cavity and a front cavity;

[0008] A sound absorbing block is installed in the rear cavity, and the sound absorbing block is formed by pressing a plurality of bass particles.

[0009] In one embodiment, the shape of the sound absorbing block is the same as the shape of the rear cavity.

[0010] In one embodiment, the sound absorbing block is in the shape of a polyhedron, a sphere or an ellipsoid.

[0011] In one embodiment, the rear cavity includes a first cavity and a second cavity connected by a slit, and the sound absorbing blocks are respectively installed in the first cavity and the second cavity.

[0012] In one embodiment, the rear cavity is filled with bass particles.

[0013] In one embodiment, sound-absorbing cotton is provided in the rear cavity.

[0014] In order to solve the above technical problems, the second technical solution adopted by the present invention is: an electronic device includes the above micro speaker module.

[0015] The beneficial effects of the utility model are as follows: the micro-speaker module has a simple and novel structure, and a sound-absorbing block formed by pressing bass particles is arranged in the rear cavity. When the volume of the sound-absorbing block is the same as the size of the filling space of the bass particles, the sound-absorbing block can contain a larger number of bass particles, that is, the equivalent rear cavity volume of the sound-absorbing block is larger, thereby reducing the resonance frequency F0 of the micro-speaker module to a greater extent, thereby further improving the low-frequency sensitivity SPL of the micro-speaker module. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the internal structure of the micro speaker of the first embodiment of the utility model;

[0018] Figure 2 This is a top view of the internal structure of the micro-speaker according to the second embodiment of the present invention.

[0019] Description of Figure Numbers:

[0020] 1. Speaker unit;

[0021] 2. Module housing;

[0022] 3. Sound-absorbing blocks;

[0023] 4. Back cavity; 41. First cavity; 42. Second cavity; 43. Slit. DETAILED DESCRIPTION

[0024] The purpose, features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that if the embodiments of the present invention involve directional indications such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0027] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0028] In addition, if the meaning of "and / or" appears in the full text is to include three parallel solutions, taking "and / or" as an example, it includes solutions, or solutions, or solutions that are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0029] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] Embodiment 1

[0031] Please refer to Figure 1 , Embodiment 1 of the present utility model is: a miniature speaker module, which can be applied to electronic devices such as mobile phones, tablet computers, smart watches, etc.

[0032] The micro-speaker module includes a speaker unit 1, a module shell 2 and a sound absorbing block 3. The speaker unit 1 is installed in the module shell 2 and divides the internal space of the module shell 2 into a rear cavity 4 and a front cavity; the sound absorbing block 3 is installed in the rear cavity 4, and the sound absorbing block 3 is pressed by multiple bass particles. Optionally, the sound absorbing block 3 is bonded and fixed to the module shell 2.

[0033] It is easy to understand that in the process of press-molding the sound-absorbing block 3, by adjusting the pressure of the pressing equipment to a suitable pressure value range, the sound-absorbing block 3 can be formed without damaging or slightly damaging the bass particles. The pressure value adjustment range of the pressing equipment can be obtained by a limited number of experiments.

[0034] Preferably, the shape of the sound absorbing block 3 is the same as that of the rear cavity 4, that is, the sound absorbing block 3 is configured to imitate the rear cavity 4, so that the sound absorbing block 3 can contain more bass particles, thereby maximizing the volume of the rear cavity 4, and reducing the resonance frequency F0 of the micro-speaker module to a greater extent, thereby further improving the low-frequency sensitivity SPL of the micro-speaker module.

[0035] Of course, in the actual production process, in order to make the sound absorbing block 3 universal, the sound absorbing block 3 can be set to be a polyhedron, a sphere, an ellipsoid or other shapes. In this embodiment, the sound absorbing block 3 is in a sheet shape.

[0036] In addition, in actual products, on the basis of setting the sound absorbing block 3 in the rear cavity 4, bass particles can be further filled into the rear cavity 4 and / or sound absorbing cotton can be set in the rear cavity 4, so as to form a combined structure for enlarging the virtual rear cavity 4.

[0037] This embodiment further provides an electronic device, wherein the electronic device has the micro speaker module.

[0038] Embodiment 2

[0039] Please refer to Figure 2 , Embodiment 2 of the present invention is a parallel technical solution of Embodiment 1, and is different from Embodiment 1 in that: the rear chamber 4 of the micro speaker includes a first chamber 41 and a second chamber 42 connected by a slit 43. At this time, in order to increase the overall volume of the rear chamber 4 to a greater extent, the sound absorbing block 3 is preferably installed in the first chamber 41 and the second chamber 42 respectively. In this way, the problem of difficulty in filling bass particles in the first chamber 41 / second chamber 42 when the width of the slit 43 is less than or equal to 2 times the diameter of the bass particle is effectively solved, and the problem of difficulty in filling bass particles in the first chamber 41 / second chamber 42 due to static electricity can also be solved.

[0040] This embodiment further provides an electronic device, wherein the electronic device has the micro speaker module.

[0041] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A micro speaker module, characterized in that: include Speaker unit; A module housing, wherein the speaker unit is installed in the module housing and the inner space of the module housing is divided into a rear cavity and a front cavity; A sound absorbing block is installed in the rear cavity, and the sound absorbing block is formed by pressing a plurality of bass particles; the rear cavity comprises a first chamber and a second chamber connected by a slit, and the sound absorbing block is installed in the first chamber and the second chamber respectively.

2. The micro speaker module according to claim 1, characterized in that: The shape of the sound absorbing block is the same as that of the rear cavity.

3. The micro speaker module according to claim 1, characterized in that: The sound absorbing block is in the shape of a polyhedron, a sphere or an ellipsoid.

4. The micro speaker module according to claim 1, characterized in that: The rear cavity is filled with bass particles.

5. The micro speaker module according to claim 1, characterized in that: Sound-absorbing cotton is arranged in the rear cavity.

6. An electronic device, characterized in that: A micro-speaker module comprising any one of claims 1-5.

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