Plug-in powder sheet, loudspeaker back cavity structure, micro loudspeaker and electronic device

Abstract

The utility model provides a kind of plug-in powder sheet, loudspeaker back cavity structure, micro loudspeaker and electronic equipment, plug-in powder sheet includes: outer frame, the installation space is formed in the outer frame;With internal microporous structure's acoustic enhancement block, the acoustic enhancement block is fixed in the installation space, and at least one outer side of the acoustic enhancement block is directly contacted with external space;Wherein, the acoustic enhancement block can be detachably installed in the back cavity of loudspeaker with the outer frame.The utility model can solve the problem of poor sound absorption effect and difficulty in applying to micro loudspeaker existing in the plug-in structure in the structure of existing loudspeaker.

Description

Technical Field

[0001] This utility model relates to the field of loudspeaker technology, and in particular to a plug-in powder sheet, a loudspeaker rear cavity structure, a miniature loudspeaker, and electronic equipment. Background Technology

[0002] To improve bass performance, loudspeakers often fill their rear cavity with sound-absorbing material (such as sound-absorbing particles or blocks). The porous structure of this material effectively increases the acoustic cavity volume, thus enhancing low-frequency response. However, traditional filling or recessed mounting methods have the following problems:

[0003] Single function: It only has sound absorption or volume expansion functions, which is difficult to meet complex needs (such as sound absorption + heat insulation / heat conduction + vibration reduction);

[0004] Fixed structure: The sound-absorbing material is directly bonded to or filled into the rear cavity of the speaker, and cannot be replaced or adjusted. If it breaks or its performance degrades, the whole thing needs to be replaced.

[0005] Vibration risk: During operation, the sound-absorbing material may shift or fall off due to vibration, affecting the sealing and acoustic performance.

[0006] To address the problem of the aforementioned fixed and irreplaceable structure, existing technologies have proposed a method of plugging and assembling sound-absorbing materials, such as Chinese invention patent application CN1914948A, which discloses a loudspeaker device, such as... Figure 1 As shown, the loudspeaker device includes: a housing 10; a loudspeaker unit 11 mounted on the housing 10; a first container 13 detachably mounted in a first opening formed in the housing 10; and an absorbent material 14 disposed inside the first container 13; wherein a vent 13h is formed through the first container 13 to allow air to circulate between the inside of the first container and the inside of the housing.

[0007] The first container disclosed in the aforementioned patent application is detachably installed in the rear cavity of the speaker unit. At the same time, the first container is provided with an absorbent material, which is a porous material (such as activated carbon), so that the absorbent material can be easily replaced. However, as speakers gradually become miniaturized, the drawbacks of its structure gradually become apparent.

[0008] The above solution uses a single, complete box-shaped container to hold the absorbent material. The porous material communicates with the speaker's rear chamber through openings in the box. This presents the following problems:

[0009] 1. Since the porous material is directly connected to the rear cavity of the speaker only through the opening, the porous material at the end face without the opening will be blocked by the side wall of the box container, resulting in insufficient contact area and the effect of the adsorption material is not obvious.

[0010] 2. The container containing the adhesive material has perforated sidewalls on both the top and bottom sides in the thickness direction, which results in a relatively large thickness of the entire detachable structure, making it unsuitable for use in relatively small miniature speakers.

[0011] 3. Since it needs to open on the side wall of the container to form a conductive structure, the box is usually made of plastic / metal. The burrs formed by the opening will be unavoidable. On the one hand, it will further squeeze the space of the speaker's rear cavity, making it more difficult to apply to miniature speakers. On the other hand, when the porous material works in the box, it will rub and collide with the burrs, causing the porous material to suffer serious powdering and breakage problems. Utility Model Content

[0012] The purpose of this invention is to provide a plug-in powder sheet, a speaker rear cavity structure, a miniature speaker, and an electronic device, to solve the problems of poor sound absorption and difficulty in applying the plug-in structure in existing speaker structures to miniature speakers.

[0013] The above-mentioned technical objectives of this utility model are mainly achieved through the following technical solutions.

[0014] In a first aspect, this utility model provides a plug-in powder sheet, which includes:

[0015] An outer frame, within which an installation space is formed;

[0016] An acoustic enhancement block with an internal microporous structure is fixed within the mounting space, and at least one outer surface of the acoustic enhancement block is exposed within the mounting space and in direct contact with the external space.

[0017] The acoustic enhancement block can be detachably installed in the rear cavity of the speaker along with the outer frame.

[0018] In a preferred embodiment of the present invention, the outer frame includes a plurality of side plates connected end to end, and the plurality of side plates enclose an installation space with openings on the upper and lower sides.

[0019] In a preferred embodiment of this utility model, the acoustic enhancement block is fixedly installed inside the outer frame by snap-fit ​​or adhesive bonding.

[0020] In a preferred embodiment of the present invention, the acoustic enhancement block includes multiple functional layers stacked together, wherein the functional layers are sound-absorbing layers, heat insulation / heat conduction layers, or vibration damping layers.

[0021] Secondly, this utility model also provides a loudspeaker rear cavity structure, which includes:

[0022] The rear chamber is formed by the speaker housing, and the side wall of the rear chamber has an opening that connects the rear chamber to the external space;

[0023] As described above, the plug-in powder sheet extends into the rear cavity through the plug-in port, so that at least one outer surface of the acoustic reinforcement block inside the plug-in powder sheet directly contacts the rear cavity.

[0024] In a preferred embodiment of the present invention, at least one side plate of the plug-in powder sheet inner and outer frame is located outside the rear chamber and abuts against the side wall of the rear chamber.

[0025] In a preferred embodiment of this utility model, the side plate that abuts against the side wall of the rear chamber is fixed to the side wall of the rear chamber by means of adhesive bonding, snap-fitting, or magnetic attraction.

[0026] Thirdly, this utility model also provides a miniature loudspeaker, which includes:

[0027] A loudspeaker housing, wherein an inner cavity is formed within the loudspeaker housing;

[0028] A loudspeaker unit is fixed inside the loudspeaker housing to divide the inner cavity into a front cavity and a rear cavity, wherein the rear cavity adopts the loudspeaker rear cavity structure as described above.

[0029] In a preferred embodiment of the present invention, the speaker housing includes an upper cover and a lower cover that are joined together, and the inner cavity is formed between the upper cover and the lower cover. A support plate for fixing the speaker unit is provided on the inner wall surface of the upper cover and / or the inner wall surface of the lower cover.

[0030] Fourthly, this utility model also provides an electronic device, which includes the miniature speaker described above.

[0031] Compared with the prior art, the technical solution of this utility model has the following features and advantages:

[0032] 1. This invention improves the flexibility and maintainability of speaker modules. Traditional speaker modules are assembled with all parts glued / welded in place; if any component fails, the entire module must be replaced. This invention, through a modular design of the rear cavity and filler, supports quick replacement of inserts, avoiding performance degradation due to damage to the filler in the rear cavity. It also adapts to different device needs (such as mobile phones, car audio systems, AR / VR devices), reducing replacement costs.

[0033] 2. This invention enhances the multi-dimensional performance of the speaker module. By assembling multiple layers of composite materials in the rear cavity, it achieves sound absorption, heat insulation / heat conduction, and vibration damping functions, optimizing the overall acoustic effect; and the overall reliability of the module is enhanced: the combination of the insert frame and the sheet material essentially eliminates vibration displacement, extending the service life of the materials.

[0034] 3. This utility model has significant cost and environmental advantages. On the one hand, the insert frame can be reused, and waste sheets can be recycled to a certain extent, reducing pollution from waste materials; on the other hand, modular production reduces assembly complexity and is suitable for large-scale applications. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0036] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances.

[0037] Figure 1 This is a schematic diagram of the existing technology;

[0038] Figure 2 Here is a schematic diagram of the plug-in powder sheet of this utility model:

[0039] Figure 3 This is a cross-sectional view of the plug-in powder sheet of this utility model;

[0040] Figure 4 This is a cross-sectional view of another embodiment of the plug-in powder sheet described in this utility model;

[0041] Figure 5 This is an exploded view of the miniature speaker described in this utility model;

[0042] Figure 6 This is a cross-sectional view of the miniature speaker described in this utility model.

[0043] Explanation of reference numerals in the attached figures:

[0044] 100. Plug-in powder sheet; 101. Outer frame; 102. Side panel; 103. Acoustic reinforcement block;

[0045] 200. Miniature speaker; 201. Top cover; 202. Bottom cover; 203. Socket; 204. Support plate; 205. Speaker driver; 206. Front chamber; 207. Rear chamber. Detailed Implementation

[0046] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0047] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0049] Implementation Method 1:

[0050] like Figures 2 to 4 As shown, this utility model provides a plug-in type powder sheet 100, which includes: an outer frame 101, in which an installation space is formed; an acoustic enhancement block 103 with an internal microporous structure, the acoustic enhancement block 103 being fixed in the installation space, and at least one outer side of the acoustic enhancement block 103 being exposed in the installation space and in direct contact with the outside space; wherein, the acoustic enhancement block 103 can be detachably installed together with the outer frame 101 in the rear cavity of the speaker.

[0051] The plug-in powder sheet 100 of this utility model, after being inserted into the speaker, has at least one outer surface of the acoustic enhancement block 103 fixed inside the outer frame 101 that can directly contact the rear cavity space of the speaker, thereby increasing the effect of the acoustic enhancement block 103 on the rear cavity of the speaker.

[0052] Specifically, such as Figure 2 As shown, the outer frame 101 includes multiple side panels 102 connected end to end, and the multiple side panels 102 enclose an installation space with openings on the top and bottom sides; the outer frame 101 can be made of plastic or metal and is shaped to fit the rear cavity of the speaker. In this embodiment, the outer frame 101 has four side panels 102, and the four side panels 102 enclose a rectangular frame structure.

[0053] The plug-in powder sheet 100 of this utility model has an outer frame 101 formed by connecting multiple side plates 102 end to end. Based on the acoustic enhancement block 103 of the same thickness, the thickness of the entire plug-in structure (plug-in powder sheet 100) is relatively small, which makes it compatible with the current miniature loudspeaker 200.

[0054] Furthermore, the space inside the outer frame 101 is filled with an acoustic enhancement block 103. The acoustic enhancement block 103 can be a zeolite block or other functional materials (such as foam or graphite sheets). At least one side of the acoustic enhancement block 103, which is inserted into the rear cavity of the speaker along with the outer frame 101, can directly contact the rear cavity of the speaker, thereby enabling the microporous structure inside the acoustic enhancement block 103 to communicate with the rear cavity of the speaker, thereby enhancing the acoustic performance of the speaker.

[0055] The acoustic enhancement block 103 can be fixedly installed inside the outer frame 101 by snap-fit ​​or adhesive. After long-term use, the acoustic enhancement block 103 can be easily replaced because it is integrated into the outer frame 101, and the outer frame 101 can be reused.

[0056] According to one embodiment of the present invention, such as Figure 4 As shown, the acoustic enhancement block 103 includes multiple functional layers stacked together, which are sound-absorbing layers, heat insulation / heat conduction layers, or vibration damping layers; by stacking multiple different materials, the functions of sound absorption + heat insulation + vibration damping are achieved, thus optimizing the overall acoustic effect.

[0057] The sound-absorbing layer can be one or a combination of porous materials (zeolite, activated carbon, etc.), foam, sound-absorbing cotton, fiber blocks, etc.; the heat insulation / thermal conductive layer can be heat-insulating asbestos, activated carbon, graphite, etc. (the latter two are thermally conductive); the vibration damping layer is made of a similar porous and / or flexible material to the sound-absorbing layer. Through a clearly defined layered design, the corresponding porous materials possess specific functions, thereby expanding the application range of the plug-in powder sheet.

[0058] Implementation Method Two:

[0059] like Figure 5 and Figure 6 As shown, this utility model also provides a loudspeaker rear cavity structure, which includes: a rear cavity 207 formed by the loudspeaker housing, and an insertion port 203 on the side wall of the rear cavity 207 communicating with the external space; a plug-in powder sheet 100 as described in Embodiment 1, the plug-in powder sheet 100 extending into the rear cavity 207 through the insertion port 203, so that at least one outer side of the acoustic enhancement block 103 in the plug-in powder sheet 100 directly contacts the rear cavity 207.

[0060] The technical effects of installing the plug-in powder sheet 100 in the rear cavity structure of the loudspeaker have been explained in detail above, and will not be repeated here.

[0061] At least one side plate 102 of the inner and outer frame 101 of the plug-in powder sheet 100 is located outside the rear chamber 207 and abuts against the side wall of the rear chamber 207. The side plate 102 abutting against the side wall of the rear chamber 207 and the side wall of the rear chamber 207 are fixed together by adhesive, snap-fit ​​or magnetic connection. In addition to the commonly used adhesive, the plug-in powder sheet 100 can also be fixed by snap-fit ​​connection structure to replace adhesive, thereby improving assembly efficiency. It can also be fixed by magnetic connection to eliminate the need to disassemble the fixing structure, thereby improving the efficiency of disassembly and replacement.

[0062] Implementation Method 3:

[0063] like Figure 5 and Figure 6 As shown, the present invention also provides a miniature loudspeaker 200, which includes: a loudspeaker housing, an inner cavity formed therein; a loudspeaker unit 205, the loudspeaker unit 205 being fixed inside the loudspeaker housing to divide the inner cavity into a front cavity 206 and a rear cavity 207, the rear cavity 207 adopting the loudspeaker rear cavity structure as described in Embodiment 2.

[0064] The technical effects of incorporating a plug-in powder plate 100 within the miniature speaker 200 have been described in detail above and will not be repeated here.

[0065] Specifically, such as Figure 5 and Figure 6 As shown, the speaker housing includes an upper cover 201 and a lower cover 202 that are joined together, forming an inner cavity between the upper cover 201 and the lower cover 202. A support plate 204 for fixing the speaker unit 205 is provided on the inner wall surface of the upper cover 201 and / or the inner wall surface of the lower cover 202. An insertion port 203 for installing a plug-in powder sheet 100 is formed on the side wall of the upper cover 201 and / or the lower cover 202.

[0066] Implementation Method Four:

[0067] This invention also provides an electronic device, which includes a miniature speaker 200 as described in Embodiment 3.

[0068] The technical effects of installing a plug-in powder chip 100 inside the electronic device have been explained in detail above and will not be repeated here.

[0069] The miniature speaker 200 described in this utility model has a wide range of applications, such as in thin and light devices commonly found in consumer electronics, such as mobile phones, tablets, and TWS earphones; in car audio systems to achieve sound insulation and bass enhancement in the battery compartment of new energy vehicles; or in smart home devices such as smart speakers and AR / VR devices for miniature speaker optimization.

[0070] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A plug-in type powder sheet, characterized in that, include: An outer frame (101) has an installation space formed within it; An acoustic enhancement block (103) with an internal microporous structure is fixed in the installation space, and at least one outer surface of the acoustic enhancement block (103) is exposed in the installation space and directly contacts the outside space; The acoustic enhancement block (103) can be detachably installed in the rear cavity of the speaker together with the outer frame (101).

2. The plug-in powder sheet according to claim 1, characterized in that, The outer frame (101) includes a plurality of side plates (102) connected end to end, and the plurality of side plates (102) enclose an installation space with openings on the upper and lower sides.

3. The plug-in powder sheet according to claim 1 or 2, characterized in that, The acoustic enhancement block (103) is fixedly installed inside the outer frame (101) by snap-fit ​​or adhesive.

4. The plug-in powder sheet according to claim 1, characterized in that, The acoustic enhancement block (103) includes multiple functional layers stacked together and having different functions, each of which is a sound-absorbing layer, a heat insulation / heat-conducting layer or a vibration-damping layer.

5. A loudspeaker rear cavity structure, characterized in that, include: The rear chamber (207) formed by the speaker housing has an inlet (203) on its side wall that connects the rear chamber (207) to the outside space; As described in any one of claims 1-4, the plug-in powder sheet (100) extends into the rear chamber (207) through the socket (203) so that at least one outer surface of the acoustic reinforcement block (103) in the plug-in powder sheet (100) directly contacts the rear chamber (207).

6. The loudspeaker rear cavity structure according to claim 5, characterized in that, At least one side plate (102) of the inner and outer frames (101) of the plug-in powder sheet (100) is located outside the rear chamber (207) and abuts against the side wall of the rear chamber (207).

7. The loudspeaker rear cavity structure according to claim 6, characterized in that, The side plate (102) that abuts against the side wall of the rear chamber (207) and the side wall of the rear chamber (207) are fixed together by means of adhesive, snap-fit ​​or magnetic connection.

8. A miniature loudspeaker, characterized in that, include: A loudspeaker housing, wherein an inner cavity is formed within the loudspeaker housing; A loudspeaker unit (205) is fixed inside the loudspeaker housing to divide the inner cavity into a front cavity (206) and a rear cavity (207), wherein the rear cavity (207) adopts the loudspeaker rear cavity structure as described in any one of claims 5-7.

9. The miniature loudspeaker according to claim 8, characterized in that, The speaker housing includes an upper cover (201) and a lower cover (202) that are joined together, and the inner cavity is formed between the upper cover (201) and the lower cover (202). A support plate (204) for fixing the speaker unit (205) is provided on the inner wall surface of the upper cover (201) and / or the inner wall surface of the lower cover (202).

10. An electronic device, characterized in that, Includes the miniature loudspeaker (200) as described in claim 8 or 9.

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