A partition device for securing acoustic enhancers and its assembly method and application

Abstract

The application provides a partition device for fixing acoustic reinforcement and an assembling method and application thereof, wherein the partition device is assembled in a rear cavity of a loudspeaker, independently forms or jointly forms a space for filling acoustic reinforcement with other parts of the loudspeaker except the partition device, at least one part of the partition device is air-permeable and acoustically transparent, at least one part of the partition device can be deformed when one or more deformation trigger conditions are applied, and the partition device tightly wraps the acoustic reinforcement in the space after the one or more deformation trigger conditions are applied. The partition device provided by the application fixes the acoustic reinforcement in a specific space in the rear cavity, and when the structure is assembled in the rear cavity of the loudspeaker of a terminal device, the loudspeaker can not only fill as many acoustic reinforcements as possible in the limited rear cavity of the loudspeaker to further improve the acoustic performance of the loudspeaker, but also greatly improve the reliability of the loudspeaker, and further improve the acoustic performance of the loudspeaker.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of partition device for fixing acoustic reinforcement and its assembly method and application, belong to electroacoustic product technical field. BACKGROUND

[0002] European patent EP2424270 discloses a technology for virtually increasing the rear cavity of a loudspeaker by using zeolite material, which places acoustic enhancement materials such as zeolite, activated carbon and the like with gas adsorption and desorption capacity in the loudspeaker cavity to make the performance of the loudspeaker reach the performance when the cavity volume is expanded several times of the original volume without changing the cavity volume. In recent years, this technology has been widely used in the loudspeakers of smart phones, tablet computers, thin and light notebook computers and other devices, so that they can achieve better sound performance in limited space.

[0003] At present, acoustic enhancement materials are mostly in the form of particle microspheres with a diameter of 100-600 μm. The particle microspheres are applied in the back cavity of a micro loudspeaker to achieve the effect of reducing the minimum resonance frequency, enhancing the low-frequency sensitivity and improving the low-frequency performance of the loudspeaker. However, when the acoustic enhancement material is filled in the rear cavity of the loudspeaker, the performance may be reduced and even the loudspeaker may be damaged due to the collision and friction between the particles and the shell, and between the particles. To solve this problem, the existing technical solutions often add a limiting structure to the loudspeaker shell or use sound-absorbing cotton and other breathable materials to limit the acoustic enhancement material particles in a certain area to avoid the friction and collision failure of the acoustic enhancement material particles. However, even if a limiting structure is designed on the loudspeaker shell or sound-absorbing cotton is added as a barrier, the particle type acoustic enhancement material may still have problems such as particle breakage, powder shedding and collision noise in the application process. The reasons for these problems are as follows:

[0004] Firstly, the form of the acoustic enhancement material particles and the filling technology are limited. Specifically, the acoustic enhancement material particles are difficult to fill the filling area by 100% in the loudspeaker cavity space, i.e. there is still a free space for the particles to move in the cavity.

[0005] In addition, when the loudspeaker is working, the diaphragm pushes the airflow, and the airflow pushes the particles, causing the particles to vibrate and collide with each other and with the loudspeaker shell, resulting in the above-mentioned problems.

[0006] Therefore, it has become a technical problem to be solved in the field to provide a partition device for fixing acoustic reinforcement and its assembly method and application. SUMMARY

[0007] To solve the above-mentioned shortcomings and deficiencies, one object of the present application is to provide a partition device for fixing acoustic reinforcement.

[0008] It is another object of the present application to provide a loudspeaker comprising the partition device for securing acoustic enhancement as described above.

[0009] It is still another object of the present application to provide a method for assembling the partition device for securing acoustic enhancement as described above.

[0010] It is yet another object of the present application to provide an electronic device, wherein the partition device for securing acoustic enhancement as described above is assembled in the back cavity of the loudspeaker of the electronic device.

[0011] To achieve the above objects, in one aspect, the present application provides a partition device for securing acoustic enhancement, wherein the partition device is assembled in the back cavity of a loudspeaker, alone or in combination with other parts of the loudspeaker except the partition device, to form a space for packing acoustic enhancement, at least one part of the partition device is air-permeable and acoustically transparent, at least one part of the partition device can be deformed when one or more deformation trigger conditions are applied, and the partition device tightly wraps the acoustic enhancement in the space after the one or more deformation trigger conditions are applied.

[0012] As a specific embodiment of the partition device for securing acoustic enhancement as described above, the deformation trigger conditions include, but are not limited to, one or more combinations of mechanical force, temperature, humidity, sound wave, light, electric current, magnetic field force, chemical atmosphere, air pressure, etc.

[0013] As a specific embodiment of the partition device for securing acoustic enhancement as described above, the deformation trigger conditions are heat treatment and / or mechanical force.

[0014] As a specific embodiment of the partition device for securing acoustic enhancement as described above, the material of the deformable part of the partition device includes, but is not limited to, one or more combinations of aluminum, stainless steel, polycarbonate, acrylic rubber, polyethylene, polytetrafluoroethylene, polyvinyl chloride, PET, silica gel material, etc.

[0015] As a specific embodiment of the partition device for securing acoustic enhancement as described above, the deformation rate of the partition device is between 2% and 50%.

[0016] As a specific embodiment of the partition device for securing acoustic enhancement as described above, the partition device includes a two-dimensional partition device or a three-dimensional partition device.

[0017] As a specific embodiment of the partition device for fixing acoustic reinforcement components according to the present application, the two-dimensional partition device is a planar structure and / or a curved surface structure.

[0018] As a specific embodiment of the partition device for fixing acoustic reinforcement components according to the present application, the three-dimensional partition device is a polyhedral structure or a rotational body structure.

[0019] In another aspect, the present application also provides a loudspeaker comprising the partition device for fixing acoustic reinforcement components according to the present application, one or more acoustic sensors, one or more housings, and one or more partition devices for fixing acoustic reinforcement components, wherein the one or more acoustic sensors and the one or more housings combine to form a back cavity of the loudspeaker, and the one or more partition devices for fixing acoustic reinforcement components are assembled in the back cavity, and the space formed by the partition device alone or in combination with other parts of the loudspeaker except the partition device tightly encloses the acoustic reinforcement components in the space.

[0020] In yet another aspect, the present application also provides an assembly method of the partition device for fixing acoustic reinforcement components according to the present application, wherein the assembly method comprises:

[0021] filling the acoustic reinforcement components into the space formed by the partition device alone or in combination with other parts of the loudspeaker except the partition device to reach an initial assembly state, applying one or more deformation triggering conditions to make at least one part of the partition device deform and the deformation rate reach a target value, and tightly enclosing the acoustic reinforcement components in the space by the partition device to reach a completed assembly state.

[0022] As a specific embodiment of the assembly method of the partition device for fixing acoustic reinforcement components according to the present application, the target value of the deformation rate is between 2% and 50%.

[0023] In the present application, the material, shape, size, filling amount, etc. of the acoustic reinforcement components can be selected according to the application scenario and requirements. In a specific embodiment of the present application, the acoustic reinforcement components include but are not limited to one or more combinations of acoustic reinforcement particles, acoustic reinforcement blocks, acoustic reinforcement sheets, acoustic reinforcement powders, etc.

[0024] Among them, the application does not make specific requirements for the acoustic enhancer, and the skilled in the art can reasonably select the acoustic enhancer according to the actual operation needs on site, for example, in a specific embodiment of the application, the acoustic enhancer can be the acoustic enhancer with air adsorption characteristics disclosed in EP2424270 (such as natural zeolite, activated carbon, white carbon black, silicon dioxide, artificial zeolite, etc.), or the acoustic enhancer described in the patents with application numbers CN202110280618.8, CN202110279512.6, CN202110116598.0, CN202110116612.7, CN202110324116.0 and CN202110324117.5.

[0025] In still another aspect, the application also provides an electronic device, wherein the loudspeaker back cavity of the electronic device is equipped with the above-mentioned partition device for fixing the acoustic enhancer.

[0026] As a specific embodiment of the above-mentioned electronic device of the application, the electronic device includes but is not limited to smart phones, TWS earphones, headsets, smart glasses, smart watches, tablet computers or thin and light notebook computers, etc.

[0027] The partition device for fixing the acoustic enhancer provided by the application fixes the acoustic enhancer in a specific space of the back cavity, when this structure is equipped in the loudspeaker back cavity of the terminal device, not only can as many acoustic enhancers as possible be filled in the limited loudspeaker back cavity to further improve the acoustic performance of the loudspeaker, but also can reduce or even avoid the vibration and collision of the acoustic enhancer during the operation of the loudspeaker, thereby reducing the risk of fragmentation and powder falling of the acoustic enhancer, greatly improving the reliability of the loudspeaker, and also eliminating the noise caused by the vibration of the acoustic enhancer, improving the acoustic performance of the loudspeaker. The application can also make the acoustic performance of the loudspeaker back cavity consistent in different orientations, thereby improving the acoustic performance of the terminal device. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0029] Figure 1 It is a schematic diagram of a loudspeaker.

[0030] Figure 2a And Figure 2b It is a schematic diagram of a loudspeaker with a back cavity partition device.

[0031] Figure 3a and Figure 3b A schematic diagram of an embodiment of assembling a rear cavity partition device and acoustic enhancement particles.

[0032] Figure 4a and Figure 4b A schematic diagram of an embodiment of assembling a rear cavity partition device and acoustic enhancement particles. DETAILED DESCRIPTION

[0033] "Range" disclosed herein is given in the form of a lower limit and an upper limit. It can be one or more lower limits, and one or more upper limits respectively. A given range is defined by selecting a lower limit and an upper limit. The selected lower limit and upper limit define the boundaries of a particular range. All ranges defined in this way are combinable, i.e., any lower limit can be combined with any upper limit to form a range. For example, for a particular parameter, a range of 60-120 and 80-110 is listed, and it is understood that a range of 60-110 and 80-120 is also expected. In addition, if the minimum range values ​​listed are 1 and 2, and the maximum range values ​​listed are 3, 4, and 5, then the following ranges can all be expected: 1-3, 1-4, 1-5, 2-3, 2-4, and 2-5.

[0034] In this disclosure, unless otherwise specified, the numerical range "ab" is an abbreviation for any combination of real numbers between a and b, where a and b are real numbers. For example, the numerical range "0-5" indicates that all real numbers between "0-5" are listed herein, and "0-5" is merely an abbreviation for these numerical combinations.

[0035] In the present invention, unless otherwise specified, all embodiments and preferred embodiments mentioned herein can be combined with each other to form a new technical solution.

[0036] In the present invention, unless otherwise specified, all technical features and preferred features mentioned herein can be combined with each other to form a new technical solution.

[0037] In the present invention, unless otherwise specified, the term "comprising" as used herein may be open-ended or closed-ended. For example, the term "comprising" may mean that other materials and / or elements not listed may also be included, or may mean that only the listed materials and / or elements are included.

[0038] In order to have a clearer understanding of the technical features, objectives and beneficial effects of the present invention, the technical solutions of the present invention are described in detail below in conjunction with the following specific embodiments, but they should not be construed as limiting the scope of implementation of the present invention.

[0039] Figure 1Figure 1 is a schematic diagram of a loudspeaker. In some embodiments, the loudspeaker 100 comprises an acoustic sensor 110, an upper loudspeaker enclosure 120, and a lower loudspeaker enclosure 130. The acoustic sensor 110 is configured to convert electrical energy to acoustic energy. The acoustic sensor 110 is fixedly connected to an opening of the upper loudspeaker enclosure 120, such that the acoustic sensor 110 is in acoustic communication with the external environment. The acoustic sensor 110 can be connected to the upper loudspeaker enclosure 120 by any means, including but not limited to adhesion, fasteners, and insertion. The upper loudspeaker enclosure 120 comprises an opening. The upper loudspeaker enclosure 120 is fixedly connected to the lower loudspeaker enclosure 130. The upper loudspeaker enclosure 120 can be connected to the lower loudspeaker enclosure 130 by any means, including but not limited to adhesion, welding, fasteners, and insertion. The acoustic sensor 110, the upper loudspeaker enclosure 120, and the lower loudspeaker enclosure 130 collectively form a back volume 140 of the loudspeaker 100.

[0040] Figure 2a Figure 2 is a schematic diagram of a loudspeaker with a back volume partitioning device. Figure 2b Figure 3 is a schematic diagram of a loudspeaker with a two-dimensional back volume partitioning device. Figure 2a Figure 4 is a schematic diagram of a loudspeaker with a three-dimensional back volume partitioning device. Figure 2b

[0041] In some embodiments, the loudspeaker 100 further comprises one or more two-dimensional back volume partitioning devices 210. The two-dimensional back volume partitioning devices 210 are configured to be disposed in the back volume 140 of the loudspeaker 100. The two-dimensional back volume partitioning devices 210 are configured to partition the back volume 140 in cooperation with at least one other component of the loudspeaker 100, other than the partitioning device. In some embodiments, the two-dimensional back volume partitioning devices 210 are fixedly connected to the upper loudspeaker enclosure 120 and the lower loudspeaker enclosure 130, respectively, thereby partitioning the back volume 140 into a first space 141 and a second space 142. In some embodiments, the two-dimensional back volume partitioning devices 210 can be fixedly connected to only the upper loudspeaker enclosure 120 or the lower loudspeaker enclosure 130, thereby partitioning the back volume 140 into a first space 141 and a second space 142. The two-dimensional back volume partitioning devices 210 are acoustically transparent and do not affect the air flow between the first space 141 and the second space 142. In some embodiments, the two-dimensional back volume partitioning devices 210 can be planar. In some embodiments, the two-dimensional back volume partitioning devices 210 can be curved. In some embodiments, the two-dimensional back volume partitioning devices 210 can be a combination of planar and curved. In some embodiments, the two-dimensional back volume partitioning devices 210 can be flexible. In some embodiments, the two-dimensional back volume partitioning devices 210 can be rigid. In some embodiments, the two-dimensional back volume partitioning devices 210 can be a combination of flexible and rigid. The first space 141 can be filled with an acoustic enhancement material to improve the bass performance of the loudspeaker 100. The acoustic enhancement material can comprise one or more of a gas adsorbing material, such as a molecular sieve, activated carbon, a porous metal oxide, a porous metal organic framework (MOF), and the like.​

[0042] In some embodiments, the loudspeaker 100 further comprises one or more three-dimensional back cavity partition devices 220. The three-dimensional back cavity partition devices 220 are fitted in the back cavity of the loudspeaker 100. The three-dimensional back cavity partition devices 220 can accomplish the spatial partition of the back cavity 140 by itself. The three-dimensional back cavity partition devices 220 can be fixed in the back cavity 140. In some embodiments, the way of fixing the three-dimensional back cavity partition devices 220 in the back cavity 140 includes but is not limited to one or more of the following: hooks, clamping slots, gaskets, adhesives, etc. At least one part of the three-dimensional back cavity partition devices 220 is acoustically transparent (i.e., sound-transparent), and does not affect the air flow between the first space 141 and the second space 142. In some embodiments, the three-dimensional back cavity partition devices 220 can be a polyhedron, for example, a hexahedron. In some embodiments, the three-dimensional back cavity partition devices 220 can be a rotational body, for example, a sphere. In some embodiments, the three-dimensional back cavity partition devices 220 can be a flexible material. In some embodiments, the three-dimensional back cavity partition devices 220 can be a rigid material. In some embodiments, the three-dimensional back cavity partition devices 220 can be a combination of a flexible material and a rigid material. The first space 141 can be filled with acoustic enhancement to improve the bass performance of the loudspeaker 100. The acoustic enhancement contains gas adsorption materials, for example, one or more of the following: molecular sieves, activated carbon, porous metal oxides, porous metal-organic frameworks (MOFs), etc.

[0043] Figure 3a and Figure 3b A schematic diagram of an embodiment of a back cavity partition device and acoustic enhancement particles. Figure 3a An initial state of a two-dimensional back cavity partition device 210 fitted with acoustic enhancement is shown. Figure 3b A completed state of the aforementioned two-dimensional back cavity partition device 210 fitted with acoustic enhancement is shown.

[0044] The two-dimensional back cavity partition device 210 can be fixedly connected with other parts of the speaker 100 except the back cavity partition device to form the second space 142. The other parts of the speaker 100 except the back cavity partition device include, but are not limited to, one or more combinations of the housing, the rib wall, the acoustic sensor, and the like. In some embodiments, the two-dimensional back cavity partition device 210 is fixedly connected with the inside of the speaker 100 housing to form the second space 142. At least one part of the two-dimensional back cavity partition device 210 is air-permeable and acoustically transparent. Except for the air-permeable and acoustically transparent part, the rest of the two-dimensional back cavity partition device 210 can be air-permeable or air-tight, acoustically transparent or acoustically sealed. At least one part of the two-dimensional back cavity partition device 210 can be deformed under one or more shape deformation triggering conditions. The material of the deformable part of the two-dimensional back cavity partition device 210 includes, but is not limited to, one or more combinations of aluminum, stainless steel, polycarbonate (PC), acrylic rubber, polyethylene, polytetrafluoroethylene, polyvinyl chloride, PET, silica gel material, and the like. A plurality of acoustic enhancers 310 are filled in the second space 142 to reach an assembly initial state. In some embodiments, the thickness of the two-dimensional back cavity partition device 210 is between 0.04-0.2 mm in the assembly initial state, i.e., without applying one or more shape deformation triggering conditions. The acoustic enhancer 310 is a porous structure with adsorption properties and can easily adsorb and desorb gas molecules. The filling amount of the acoustic enhancer 310 in the second space 142 is 70%-97%. The material, shape, size, filling amount, and the like of the acoustic enhancer 310 can be selected according to the application scenario and requirements. In some embodiments, the acoustic enhancer 310 is in a granular form. In some embodiments, the at least one part of the two-dimensional back cavity partition device 210 can be air-permeable by providing a plurality of air-permeable holes on the at least one part. The opening density, arrangement, shape, number, and the like of the air-permeable holes can be selected according to the application scenario and requirements. In some embodiments, the air-permeable holes can be round holes, square holes, strip-shaped holes, and the like. In some embodiments, the air-permeable holes can be uniformly distributed or non-uniformly distributed. The maximum aperture of the air-permeable part of the two-dimensional back cavity partition device 210 is smaller than the monomer size of the acoustic enhancer 310 to ensure that the acoustic enhancer 310 can be kept in the second space 142.

[0045] In the assembly initial state, one or more shape deformation triggering conditions are applied to the two-dimensional back cavity partition device 210. The shape deformation triggering conditions include, but are not limited to, one or more combinations of mechanical force, temperature, humidity, sound wave, light, electric current, magnetic field force, chemical atmosphere, air pressure, and the like. When the deformation of the two-dimensional back cavity partition device 210 reaches a certain degree, the one or more shape deformation triggering conditions are removed. In some embodiments, the degree of deformation of the two-dimensional back cavity partition device 210 is determined by the internal volume change value of the second space 142 according to the following formula 1.1.

[0046]

[0047] In Equation 1.1, A represents the deformation ratio of the two-dimensional back cavity partition device 210, AV represents the change value of the internal volume of the second space 142, and Vo represents the internal volume of the second space 142 in the initial state of assembly. When the internal volume of the second space 142 decreases, AV is positive. In some embodiments, the deformation ratio of the two-dimensional back cavity partition device 210 is between 2% and 50%. The deformation direction control of the deformed part in the two-dimensional back cavity partition device 210 can take various forms, including but not limited to one or more combinations of shape design, material selection, trigger condition application position, combination of multiple trigger conditions, etc. In some embodiments, the two-dimensional back cavity partition device 210 can control the deformation direction of the deformed part by one or more combinations of device size, apparent morphology of different parts, joint shape of different parts, welding opening shape, etc. In some embodiments, the two-dimensional back cavity partition device 210 can control the deformation direction of the deformed part by one or more combinations of using different materials on the inside and outside of the deformed part, using different materials in the center and extension of the deformed part, etc. In some embodiments, the two-dimensional back cavity partition device 210 can control the deformation direction of the deformed part by applying a trigger condition only on one side of the deformed part. In some embodiments, the two-dimensional back cavity partition device 210 can control the deformation direction of the deformed part by applying other trigger conditions while applying mechanical force at a specific position and / or specific side of the deformed part. After deformation, the maximum pore size of the air-permeable part on the two-dimensional back cavity partition device 210 is still smaller than the monomer size of the acoustic enhancer 310, so as to ensure that the acoustic enhancer 310 can be kept in the second space 142 at all times.

[0048] In some embodiments, the two-dimensional back cavity partition device 210 reaches the assembly completion state after the removal of one or more deformation trigger conditions. In some embodiments, the two-dimensional back cavity partition device 210 needs to go through a stabilization period after the removal of one or more deformation trigger conditions to reach the assembly completion state. In some embodiments, the two-dimensional back cavity partition device 210 is put into use in the loudspeaker 100 in the assembly completion state. During the use of the loudspeaker 100, the morphology of the two-dimensional back cavity partition device 210 can change again to finally reach the required use state.

[0049] The two-dimensional back cavity partition device 210 tightly wraps the plurality of acoustic reinforcement elements 310 in the second space 142 in the assembled state / qualified use state, and the plurality of acoustic reinforcement elements 310 are extruded and fixed between each other, between the plurality of acoustic reinforcement elements 310 and the two-dimensional back cavity partition device 210, and between the plurality of acoustic reinforcement elements 310 and one or more walls forming the second space 142. The fixed position of the plurality of acoustic reinforcement elements 310 in the second space 142 effectively reduces or even eliminates the broken powder caused by the collision, sufficiently improves the service life of the acoustic reinforcement elements 310, and eliminates the noise during the use of the loudspeaker. The fixed position of the plurality of acoustic reinforcement elements 310 also makes the acoustic performance of the loudspeaker back cavity consistent in different orientations, thereby improving the acoustic performance of the terminal device.

[0050] Figure 4a and Figure 4b It is a schematic diagram of an embodiment of assembling a back cavity partition device and acoustic reinforcement particles. Figure 4a An initial state of assembling acoustic reinforcement elements in a three-dimensional back cavity partition device 220 is shown. Figure 4b A completed state of assembling acoustic reinforcement elements in the aforementioned three-dimensional back cavity partition device 220 is shown.

[0051] In some embodiments, the three-dimensional back cavity partition device 220 directly forms the second space 142. At least one portion of the three-dimensional back cavity partition device 220 is air-permeable and acoustically transparent. In some embodiments, the three-dimensional back cavity partition device 220 can be entirely air-permeable and acoustically transparent. In addition to the air-permeable and acoustically transparent portion, the remaining portion of the three-dimensional back cavity partition device 220 can be air-permeable or air-impermeable, acoustically transparent or acoustically impermeable. At least one portion of the three-dimensional back cavity partition device 220 can be deformed under one or more deformation trigger conditions. In some embodiments, the entire three-dimensional back cavity partition device 220 can be deformed. The material of the deformable portion of the three-dimensional back cavity partition device 220 includes, but is not limited to, a combination of one or more of aluminum, stainless steel, polycarbonate (PC), acrylic rubber, polyethylene, polytetrafluoroethylene, polyvinyl chloride, PET, silicone material, etc. The fixation between the three-dimensional back cavity partition device 220 and the back cavity 140 of the loudspeaker 100 includes, but is not limited to, a combination of one or more of bonding, hooks, clamping slots, gaskets, elastic / expandable coating, mesh, etc. A plurality of acoustic enhancers 310 are filled in the second space 142 to achieve an assembled initial state. In some embodiments, the thickness of each portion of the three-dimensional back cavity partition device 220 is between 0.04-0.2 mm in the assembled initial state, i.e., without applying one or more deformation trigger conditions. The acoustic enhancer 310 is a porous structure with adsorption properties and can easily adsorb and desorb gas molecules. The filling amount of the acoustic enhancer 310 in the second space 142 is 70%-97%. The material, shape, size, filling amount, etc. of the acoustic enhancer 310 can be selected according to the application scenario and requirements. In some embodiments, the acoustic enhancer 310 is in a granular form. In some embodiments, at least one portion of the three-dimensional back cavity partition device 220 can be air-permeable by providing a plurality of air-permeable holes in the at least one portion. The opening density, arrangement, shape, number, etc. of the air-permeable holes can be selected according to the application scenario and requirements. In some embodiments, the air-permeable holes can be round holes, square holes, strip-shaped holes, etc. In some embodiments, the air-permeable holes can be uniformly distributed or non-uniformly distributed. The maximum aperture of the air-permeable portion of the three-dimensional back cavity partition device 220 is smaller than the size of a single acoustic enhancer 310 to ensure that the acoustic enhancer 310 can be retained in the second space 142.

[0052] In the initial assembly state, one or more shape change triggering conditions are applied to the three-dimensional back cavity partition 220. In some embodiments, the three-dimensional back cavity partition 220 is assembled into the speaker 100 in the initial assembly state, and then one or more shape change triggering conditions are applied to reach the final assembly state. In some embodiments, the three-dimensional back cavity partition 220 is applied with one or more shape change triggering conditions in the initial assembly state to reach the final assembly state, and then is assembled into the speaker 100. The shape change triggering conditions include, but are not limited to, one or more combinations of mechanical force, temperature, humidity, sound wave, light, electric current, magnetic field force, chemical atmosphere, air pressure, etc. When the shape change of the three-dimensional back cavity partition 220 reaches a certain degree, the aforementioned one or more shape change triggering conditions are removed. In some embodiments, the degree of shape change of the three-dimensional back cavity partition 220 is determined by the internal volume change value of the second space 142 according to the following formula 1.2.

[0053]

[0054] In formula 1.2, B represents the shape change rate of the three-dimensional back cavity partition 220, ΔV represents the internal volume change value of the second space 142, and V0 represents the internal volume of the second space 142 in the initial assembly state. When the internal volume of the second space 142 decreases, ΔV is positive. In some embodiments, the shape change rate of the three-dimensional back cavity partition 220 is between 2% and 50%. The shape change direction control of the shape changed part in the three-dimensional back cavity partition 220 can be achieved in various ways, including but not limited to one or more combinations of shape design, material selection, triggering condition application position, combination of multiple triggering conditions, etc. In some embodiments, the three-dimensional back cavity partition 220 can control the shape change direction of the shape changed part by one or more combinations of device size, apparent morphology of different parts, joint shape of different parts, welding opening shape, etc. In some embodiments, the three-dimensional back cavity partition 220 can control the shape change direction of the shape changed part by one or more combinations of using different materials on the inside and outside of the shape changed part, using different materials in the center and extension of the shape changed part, etc. In some embodiments, the three-dimensional back cavity partition 220 can control the shape change direction of the shape changed part by applying triggering conditions only on one side of the shape changed part. In some embodiments, the three-dimensional back cavity partition 220 can control the shape change direction of the shape changed part by applying mechanical force to a specific position and / or side of the shape changed part while applying other triggering conditions. After the shape change is completed, the maximum pore size of the air permeable part on the three-dimensional back cavity partition 220 is still smaller than the monomer size of the acoustic enhancer 310, so as to ensure that the acoustic enhancer 310 can be always kept in the second space 142.

[0055] In some embodiments, the three-dimensional back cavity partition device 220 reaches the assembly completed state after the one or more shape change triggering conditions are removed. In some embodiments, the three-dimensional back cavity partition device 220 needs to go through a stabilization period to reach the assembly completed state after the one or more shape change triggering conditions are removed. In some embodiments, the three-dimensional back cavity partition device 220 is put into use in the speaker 100 in the assembly completed state. During the use of the speaker 100, the three-dimensional back cavity partition device 220 can change its shape again to finally reach the required use state.

[0056] In the assembly completed state / required use state, the three-dimensional back cavity partition device 220 tightly wraps the plurality of acoustic enhancers 310 in the second space 142, and the plurality of acoustic enhancers 310 are fixedly pressed between each other, between the plurality of acoustic enhancers 310 and the three-dimensional back cavity partition device 220, and between the plurality of acoustic enhancers 310 and one or more walls forming the second space 142. The fixed position of the plurality of acoustic enhancers 310 in the second space 142 effectively reduces or even eliminates the broken powder caused by the collision, greatly improves the service life of the acoustic enhancers 310, and eliminates the noise during the use of the speaker. The fixed position of the plurality of acoustic enhancers 310 also makes the acoustic performance of the speaker back cavity consistent in different orientations, thereby improving the acoustic performance of the terminal device.

[0057] Embodiment 1

[0058] The embodiment provides a partition device for fixing acoustic enhancers, wherein the manufacturing of the partition device and the assembly process thereof with the acoustic enhancers are as follows:

[0059] A stainless steel mesh and an aluminum plate with a thickness of 0.1 mm are selected as substrates, and a stamping, welding and other processes are used to manufacture a cubic container with an internal volume of 9.9 mm x 9.9 mm x 9.9 mm, wherein at least one face is a stainless steel mesh face, and the side length of a single mesh hole in the stainless steel mesh is 180 μm. As many zeolite particles (particle size 200-400 μm) as possible are filled into the container, and the final filling amount is 0.86 cc, and then packaging is performed to reach the assembly initial state.

[0060] A mechanical force is applied in any one or more of the three axial directions of the container, so that one or more faces of the container are concave inward, realizing tight wrapping of the internal zeolite particles, and reaching the assembly completed state. The apparent volume of the container in the assembly completed state is 0.87 cm 3 , and the deformation rate of the partition device is 10%, that is, the shrinkage is 10%.

[0061] Embodiment 2

[0062] The present embodiment provides a partition device for fixing an acoustic reinforcement, wherein the partition device is made and assembled with the acoustic reinforcement as follows:

[0063] A heat-shrinkable PET mesh with a thickness of 0.1 mm is made into a bag-shaped container with a length of 12 cm, a width of 12 cm, and a hole diameter of 1.5 cm. The container is laid on the inner surface of a cylindrical mold. As many activated carbon particles (particle size 2 cm) as possible are filled into the container, and the final filling volume is 260 cc. Then, the container is packaged, and the apparent volume of the container after packaging is 370 cm 3 , reaching an initial assembly state.

[0064] The packaged bag-shaped container and the mold are subjected to heat treatment at 110°C for 20 min, so that the side walls of the container are inwardly recessed to tightly wrap the activated carbon particles inside. Then, the mold is removed, reaching a completed assembly state. The apparent volume of the container in the completed assembly state is 264 cm 3 , and the deformation rate of the partition device is about 30%, i.e., about 30% shrinkage.

[0065] Embodiment 3

[0066] The present embodiment provides a partition device for fixing an acoustic reinforcement, wherein the partition device is made and assembled with the acoustic reinforcement as follows:

[0067] A polypropylene rubber mesh with a thickness of 0.1 mm, a length of 10 mm, a width of 10 mm, and a hole diameter of 350 μm is obtained. The mesh is bonded to the rear cavity wall of a loudspeaker to form a defined space together with the rear cavity wall. As many porous metal oxide sheet layers (the shortest side of the sheet layer is 400-600 μm) as possible are filled into the defined space, and the final filling volume is 0.95 cc. Then, the sheet layers are packaged, and the apparent volume of the defined space after packaging is about 1 cm 3 , reaching an initial assembly state.

[0068] The rear cavity of the loudspeaker is subjected to ultraviolet light treatment for 20 min, so that the mesh is recessed into the defined space to tightly wrap the porous metal oxide sheet layers inside, reaching a completed assembly state. The apparent volume of the defined space in the completed assembly state is 0.98 cm 3 , and the deformation rate of the partition device is 2%, i.e., 2% shrinkage.

[0069] Embodiment 4

[0070] The present embodiment provides a partition device for fixing an acoustic reinforcement, wherein the partition device is made and assembled with the acoustic reinforcement as follows:

[0071] A PC grid plate with thickness of 0.2 mm, length and width of 10.2 mm x 10.2 mm, and hole diameter of 550 μm is selected, and the grid cloth is bonded to the rear cavity wall of the speaker to form a defined space together with the rear cavity wall. As many zeolite particles (particle size of 600-800 μm) as possible are filled into the defined space, and the final filling amount is 0.84 cc, and then the defined space is packaged. After packaging, the apparent volume of the defined space is about 1.09 cm 3 , and the assembly is in the initial state.

[0072] An inward mechanical force is applied to the PC grid plate from outside the defined space, and the rear cavity of the speaker is subjected to a heat treatment at 130 °C for 30 min, so that the side walls of the container are inwardly recessed to tightly wrap the internal zeolite particles, and the assembly is in the completed state. In the completed state, the apparent volume of the defined space is 0.86 cm 3 , and the deformation rate of the partition device is 21%, i.e. 21% shrinkage.

[0073] Example 5

[0074] The present embodiment provides a partition device for fixing an acoustic reinforcement, wherein the manufacturing of the partition device and the assembly process thereof with the acoustic reinforcement are as follows:

[0075] A polyethylene grid cloth with a thickness of 0.1 mm and an aluminum plate are selected as the base material, and the grid cloth and the aluminum plate are collectively manufactured into a cubic container with an internal volume of 5 mm x 5 mm x 40 mm by using stamping, welding and other processes, wherein at least one face is a polyethylene grid cloth, and the side length of a single grid hole in the polyethylene grid cloth is 250 μm. As many zeolite particles (particle size of 300-600 μm) as possible are filled into the cubic container, and the final filling amount is 0.49 cc, and then the cubic container is packaged, and the assembly is in the initial state.

[0076] A mechanical force is applied to any one or more aluminum plate faces of the container, so that one or more faces of the container are inwardly recessed to tightly wrap the internal zeolite particles, and the assembly is in the completed state. In the completed state, the apparent volume of the container is 0.52 cm 3 , and the deformation rate of the partition device is 48%, i.e. 48% shrinkage.

[0077] Test Example 1

[0078] The combination of the partition device provided in Example 1 and the acoustic reinforcement was assembled in the back cavity of a test loudspeaker and encapsulated, and the loudspeaker was subjected to tests such as acoustic performance (F0), particle collision noise, and drop test powder, wherein the tests were all carried out by using conventional methods in the art, and the specific test method of acoustic performance can refer to the "measurement of electrical impedance" method shown in paragraphs 0049-0054 of Chinese patent CN105049997A. In the present test example, the test loudspeaker used a 1115 loudspeaker monomer (i.e., a size of 15 mm x 15 mm), and the rectangular back cavity volume was 1.5 cc, and the test results are shown in Table 1 below.

[0079] Test Example 2

[0080] The combination of the partition device provided in Example 4 and the acoustic reinforcement was assembled in the back cavity of a test loudspeaker and encapsulated, and the loudspeaker was subjected to tests such as acoustic performance (F0), particle collision noise, and drop test powder, wherein the tests were all carried out by using conventional methods in the art, and the specific test method of acoustic performance can refer to the "measurement of electrical impedance" method shown in paragraphs 0049-0054 of Chinese patent CN105049997A. In the present test example, the test loudspeaker used was the same as in Test Example 1, and the test results are shown in Table 1 below.

[0081] Comparative Test Example

[0082] The same test loudspeaker as in Test Example 1 was used, and the back cavity of the loudspeaker had a defined space with a volume of 1 cc that was acoustically coupled to the loudspeaker monomer. As many zeolite particles as possible were poured into the defined space, and the final pouring amount was 0.8 cc. After pouring was completed, encapsulation was performed. The loudspeaker was then subjected to tests such as acoustic performance (F0), particle collision noise, and drop test powder, wherein the tests were all carried out by using conventional methods in the art, and the specific test method of acoustic performance can refer to the "measurement of electrical impedance" method shown in paragraphs 0049-0054 of Chinese patent CN105049997A. In the present comparative test example, the test loudspeaker used was the same as in Test Example 1, and the test results are shown in Table 1 below.

[0083] Table 1

[0084]

[0085] As can be seen from the above Table 1, compared with the conventional assembly form of the acoustic enhancer in the rear cavity of the speaker, the application of the partition device provided by the embodiment of the present application to the assembly of the acoustic enhancer in the rear cavity of the speaker can 1) fill more acoustic enhancers in the same rear cavity of the speaker; 2) avoid the occurrence of particle collision noise and powder falling; and 3) significantly improve the acoustic performance of the acoustic enhancer compared with the conventional assembly form of the acoustic enhancer in the art.

[0086] In summary, the partition device for fixing the acoustic enhancer provided by the embodiment of the present application fixes the acoustic enhancer in a specific space in the rear cavity. When this structure is assembled in the rear cavity of the speaker of the terminal device, it can not only fill as many acoustic enhancers as possible in the limited rear cavity of the speaker to further improve the acoustic performance of the speaker, but also reduce or even avoid the vibration and collision of the acoustic enhancer during the operation of the speaker, thereby reducing the risk of fragmentation and powder falling of the acoustic enhancer and greatly improving the reliability of the speaker. In addition, it can eliminate the noise caused by the vibration of the acoustic enhancer and improve the acoustic performance of the speaker. The embodiment of the present application can also make the acoustic performance of the rear cavity of the speaker consistent in different orientations, thereby improving the acoustic performance of the terminal device.

[0087] The above is only a specific embodiment of the present application, which cannot limit the scope of the application. Therefore, the replacement of equivalent components or equivalent changes and modifications made within the scope of the patent protection of the present application should still belong to the scope covered by the present patent. In addition, the technical features in the present application can be freely combined with each other, and the technical features can be freely combined with each other.

Claims

1. An assembly method for fixing a partition device of an acoustic reinforcement, said partition device being assembled in the back cavity of a loudspeaker, characterized in that, The assembling method comprises: filling acoustic reinforcement in a space formed by the partition device alone or in combination with other parts of the loudspeaker except the partition device at a filling amount of 70%-97% to reach an initial assembling state, i.e. a state without applying one or more deformation triggering conditions, wherein at least one part of the partition device is air-permeable and acoustically transparent, and the at least one part of the partition device can be deformed when one or more deformation triggering conditions are applied; applying one or more deformation triggering conditions so that the at least one part of the partition device is deformed and the deformation rate reaches a target value, and the partition device tightly wraps the acoustic reinforcement in the space to reach a completed assembling state; wherein the deformation triggering conditions include one or more combinations of mechanical force, temperature, humidity, sound wave, light, electric current, magnetic field force, and air pressure.

2. The assembly method for securing a partition of an acoustic reinforcement according to claim 1, characterized in that, The target value of the deformation rate is between 2%-50%.

3. The assembly method for fixing a partition device of an acoustic reinforcement according to claim 1 or 2, characterized in that, The partition device comprises a two-dimensional partition device or a three-dimensional partition device.

4. The assembly method for securing a partition of an acoustic reinforcement according to claim 3, characterized in that, The two-dimensional partition device is a planar structure and / or a curved surface structure.

5. The assembly method for securing a partition of an acoustic reinforcement according to claim 3, characterized in that, The three-dimensional partition device is a polyhedral structure or a rotational body structure.

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