Half-cavity loudspeaker module
By using a breathable metal sheet and hot-melt column design in the semi-cavity speaker module, the rear cavity volume is expanded, solving the problem of insufficient rear cavity volume, improving low-frequency performance, and maintaining the module's thinness and stability, while preventing the accidental detachment or intrusion of sound-absorbing particles.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2026-03-24
AI Technical Summary
How to expand the rear cavity of a semi-cavity speaker module to improve low-frequency performance and prevent sound-absorbing particles from detaching from or intruding into the speaker unit.
The open opening of the module shell is sealed with a breathable metal sheet, and vent holes and hot melt holes are set on the metal sheet. The metal sheet is fixed to the module shell with a hot melt column. Sound-absorbing particles are filled into the rear cavity, and the breathable isolation component prevents the particles from entering the speaker unit.
The expansion of the rear cavity improved the low-frequency performance, maintained the thinness and structural stability of the speaker module, prevented the accidental detachment or intrusion of sound-absorbing particles, and simplified the production and assembly process.
Smart Images
Figure CN224037499U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to electroacoustic transducer technical field especially relates to a half cavity formula loudspeaker module. BACKGROUND
[0002] In order to make the acoustic effect of loudspeaker module better, the industry will usually choose to increase the object (such as sound absorbing particles) that can expand the virtual volume of sound cavity in the back cavity of loudspeaker module to obtain better low frequency experience.
[0003] Distinguish from the closed loudspeaker module, the back cavity of half cavity formula loudspeaker module is open, it needs to be enclosed with the other structural members of equipment to form the closed back cavity, and the back cavity of half cavity formula loudspeaker module is generally narrow, cannot form a good airtight cavity to fill sound absorbing particles, therefore, how to expand the back cavity of half cavity formula loudspeaker module is a difficulty in the industry. UTILITY MODEL CONTENT
[0004] The utility model solves the technical problem that provides a half cavity formula loudspeaker module with good low frequency effect.
[0005] In order to solve the above technical problem, the utility model adopts the technical scheme that a half cavity formula loudspeaker module comprises:
[0006] Module shell, the module shell has open mouth, inner chamber and sound outlet that communicate sequentially;
[0007] Loudspeaker unit, the loudspeaker unit is installed in the inner chamber and divides the inner chamber into front cavity and back cavity, the front cavity communicates the sound outlet, and the back cavity communicates the open mouth;
[0008] Sound absorbing particles, the sound absorbing particles are filled in the back cavity;
[0009] Metal sheet, the metal sheet is provided with a plurality of air holes, the air hole aperture is less than the particle size of the sound absorbing particles, the metal sheet is fixedly connected with the module shell and closes the open mouth to prevent the sound absorbing particles from separating from the back cavity.
[0010] Further, the metal sheet is provided with a plurality of hot melting holes, and the module shell is provided with hot melting columns matched with the hot melting holes.
[0011] Further, the hot melting columns are located in the back cavity.
[0012] Further, the metal sheet has a recessed position, and the hot melting holes are located in the recessed position.
[0013] Further, the number of hot melting columns is multiple.
[0014] Further, at least two of the hot melt columns are arranged away from each other.
[0015] Further, the air-permeable isolation member is connected to the speaker unit or the module housing, and is used to prevent the sound-absorbing particles from entering the speaker unit.
[0016] Further, the speaker unit is arranged obliquely in the inner cavity, the height of the area of the front cavity close to the sound outlet is greater than the height of the area of the front cavity away from the sound outlet, and the metal sheet has a convex structure for avoiding the speaker unit.
[0017] Further, the convex structure is not in contact with the speaker unit.
[0018] Further, the edge of the metal sheet is adhesively fixed or hot melt connected to the module housing.
[0019] The half-cavity type speaker module has a novel structure, the open mouth of the module housing is closed by the air-permeable metal sheet, the rear cavity can accommodate the sound-absorbing particles, the capacity of the rear cavity is expanded, the problem of insufficient volume of the rear cavity of the half-cavity type speaker module in the industry is solved, and the low-frequency effect of the half-cavity type speaker module is improved; the sound-absorbing particles will not accidentally escape from the rear cavity or invade the interior of the speaker unit before the half-cavity type speaker module is assembled to the electronic device; the metal sheet is thin, the half-cavity type speaker module can be kept thin, the metal sheet is easy to shape, and the production and assembly of the half-cavity type speaker module are facilitated. BRIEF DESCRIPTION OF DRAWINGS
[0020] Fig. 1 FIG. 1 is a structural schematic view of a half-cavity type speaker module;
[0021] Fig. 2 FIG. 2 is a sectional view of the half-cavity type speaker module;
[0022] Fig. 3 FIG. 3 is an exploded view of the half-cavity type speaker module.
[0023] REFERENCE SIGNS:
[0024] 1, module housing; 11, sound outlet; 12, front cavity; 13, rear cavity; 14, hot melt column;
[0025] 2, speaker unit;
[0026] 3, metal sheet; 31, hot melt hole; 32, recessed position; 33, convex structure. DETAILED DESCRIPTION
[0027] The technical content of the utility model, the purpose and effect realized are explained in detail below by combining with the embodiments and the drawings.
[0028] Please refer to Figs. 1-3 A half-cavity loudspeaker module, comprising:
[0029] A module shell 1, which has an open port, an inner cavity and a sound outlet 11 in turn;
[0030] A loudspeaker unit 2, which is installed in the inner cavity and divides the inner cavity into a front cavity 12 and a rear cavity 13, the front cavity 12 communicates with the sound outlet 11, and the rear cavity 13 communicates with the open port;
[0031] Sound-absorbing particles, which are filled in the rear cavity 13;
[0032] A metal sheet 3, which is provided with a plurality of air-permeable holes, the hole diameter of the air-permeable holes is smaller than the particle diameter of the sound-absorbing particles, the metal sheet 3 is fixedly connected with the module shell 1 and closes the open port, so as to prevent the sound-absorbing particles from separating from the rear cavity 13.
[0033] From the above description, the utility model has the beneficial effects that the half-cavity loudspeaker module has a novel structure, the open port of the module shell 1 is closed by the air-permeable metal sheet 3, so that the rear cavity 13 can accommodate sound-absorbing particles, thereby realizing the expansion of the rear cavity 13 and solving the problem of insufficient volume of the rear cavity 13 of the half-cavity loudspeaker module in the industry; the sound-absorbing particles will not accidentally separate from the rear cavity 13 or invade the inside of the loudspeaker unit 2 before the half-cavity loudspeaker module is assembled to an electronic device; the metal sheet 3 is relatively thin, so that the half-cavity loudspeaker module can remain light and thin, and the metal sheet 3 is easy to shape, thereby facilitating the production and assembly of the half-cavity loudspeaker module.
[0034] Further, the metal sheet 3 is provided with a plurality of hot-melt holes 31, and the module shell 1 is provided with hot-melt columns 14 matched with the hot-melt holes 31.
[0035] From the above description, the hot-melt columns 14 and the hot-melt holes 31 are hot-melt matched, so that the module shell 1 and the metal sheet 3 can be more stably connected, thereby improving the structural stability of the half-cavity loudspeaker module; moreover, the existence of the hot-melt columns 14 can also improve the resonance phenomenon of the module shell 1, thereby ensuring the sound effect of the half-cavity loudspeaker module.
[0036] Further, the hot-melt columns 14 are located in the rear cavity 13.
[0037] As can be seen from the above description, the presence of the hot melting hole 31 does not require the metal sheet 3 to expand in area, so that the arrangement of the hot melting hole 31 does not require the manufacturing material of the metal sheet 3 to be increased, which is conducive to the control of the manufacturing cost of the half-cavity loudspeaker module.
[0038] Further, the metal sheet 3 has a recessed position 32, and the hot melting hole 31 is located in the recessed position 32.
[0039] As can be seen from the above description, the recessed position 32 can effectively accommodate the hot melting point position formed after the hot melting of the hot melting column 14, so as to avoid the increase of the thickness of the half-cavity loudspeaker module caused by the hot melting point position. At the same time, the recessed position 32 can also play a role in protecting the hot melting point position, reducing the damage probability of the hot melting point position, and being conducive to ensuring the structural stability of the half-cavity loudspeaker module.
[0040] Further, the number of the hot melting column 14 is multiple.
[0041] Further, at least two of the hot melting columns 14 are arranged away from each other.
[0042] As can be seen from the above description, the hot melting area is arranged in multiple with intervals, which can more greatly improve the structural stability of the half-cavity loudspeaker module.
[0043] Further, it further comprises a breathable isolation piece, the breathable isolation piece is connected to the loudspeaker monomer 2 or the module shell 1, and the breathable isolation piece is used to prevent the sound-absorbing particles from entering the inside of the loudspeaker monomer 2.
[0044] Further, the loudspeaker monomer 2 is arranged obliquely in the inner cavity, the height of the area of the front cavity 12 close to the sound outlet 11 is greater than the height of the area of the front cavity 12 away from the sound outlet 11; and the metal sheet 3 has a convex structure 33 for avoiding the loudspeaker monomer 2.
[0045] As can be seen from the above description, the obliquely arranged loudspeaker monomer 2 makes the air flow in the front cavity 12 more smooth, thereby improving the sound production effect. The presence of the convex structure 33 can keep the thickness of the half-cavity loudspeaker module at a relatively thin level.
[0046] Further, the convex structure 33 is not in contact with the loudspeaker monomer 2.
[0047] Further, the edge of the metal sheet 3 is adhesively fixed or hot-melt connected with the module shell 1.
[0048] As can be seen from the above description, the connection mode of the metal sheet 3 and the module shell 1 is simple and reliable.
[0049] Please refer to Figs. 1-3The utility model discloses an embodiment one is: a half cavity formula loudspeaker module, including module shell 1, loudspeaker single body 2, sound absorbing particle and metal sheet 3, module shell 1 has the open mouth, inner chamber and sound outlet 11 that communicate in proper order, wherein, the open mouth and sound outlet 11 communicate outside atmosphere respectively, loudspeaker single body 2 is installed in the inner chamber and will the inner chamber is divided into front cavity 12 and rear cavity 13, front cavity 12 communicates sound outlet 11, rear cavity 13 communicates the open mouth, sound absorbing particle is filled in rear cavity 13, the metal sheet 3 is equipped with a plurality of air holes, the aperture of air hole is less than the particle size of sound absorbing particle, the metal sheet 3 is fixedly connected with module shell 1 and closes the open mouth to prevent sound absorbing particle from separating from rear cavity 13, in this embodiment, the edge of metal sheet 3 is bonded fixedly or hot melt connection with module shell 1.
[0050] The half cavity formula loudspeaker module further comprises a gas-permeable isolation member connected to the loudspeaker single body 2 or the module shell 1, and the gas-permeable isolation member is used to prevent the sound absorbing particles from entering the inside of the loudspeaker single body 2. It is easy to understand that the aperture of the hole on the gas-permeable isolation member is smaller than the particle size of the sound absorbing particles, so as to achieve the purpose of blocking the sound absorbing particles.
[0051] The metal sheet 3 is provided with a plurality of hot melt holes 31, and the module shell 1 is provided with hot melt columns 14 matched with the hot melt holes 31. As a preferred embodiment, the hot melt columns 14 are located in the rear cavity 13.
[0052] In this embodiment, the metal sheet 3 has a recessed position 32, and the hot melt holes 31 are located in the recessed position 32.
[0053] In one or more embodiments, the number of the hot melt holes 31 and the hot melt columns 14 is multiple, and the hot melt holes 31 and the hot melt columns 14 are one-to-one corresponding. In order to improve the structural stability of the half cavity loudspeaker module to a greater extent, at least two hot melt columns 14 are arranged away from each other.
[0054] Specifically, the module shell 1 has opposite top and bottom surfaces, the open mouth is located on the top surface of the module shell 1, the metal sheet 3 is connected to the top surface of the module shell 1, and the bottom surface of the module shell 1 is a plane. In this embodiment, the loudspeaker single body 2 is arranged obliquely in the inner chamber, the height of the area of the front cavity 12 close to the sound outlet 11 is greater than the height of the area of the front cavity 12 away from the sound outlet 11, that is, the vibrating sound emitting surface of the loudspeaker single body 2 is arranged at an acute angle with the bottom surface of the module shell 1.
[0055] In order to keep the half-cavity loudspeaker module small in thickness, the metal sheet 3 has a convex structure 33 for avoiding the loudspeaker unit 2, which can be a punching structure formed by punching.
[0056] In some embodiments, the convex structure 33 is not in contact with the loudspeaker unit 2.
[0057] The above is only an embodiment of the present application, and does not limit the patent range of the present application, and any equivalent transformation or direct or indirect application in the related technical field by using the content of the present application specification and drawings is also included in the patent protection range of the present application.
Claims
1. A half-closed loudspeaker module, characterized in that, The application relates to a loudspeaker module. The loudspeaker module comprises a module shell, a loudspeaker unit, sound-absorbing particles and a metal sheet. The module shell has an open port, an inner cavity and a sound outlet which are sequentially communicated. The loudspeaker unit is installed in the inner cavity and divides the inner cavity into a front cavity and a rear cavity. The front cavity is communicated with the sound outlet, and the rear cavity is communicated with the open port.
2. The half-closed loudspeaker module according to claim 1, characterized in that, The sound-absorbing particles are filled in the rear cavity.
3. The half-closed loudspeaker module according to claim 2, characterized in that, The metal sheet is fixedly connected with the module shell and seals the open port.
4. The half-closed loudspeaker module according to claim 2, characterized in that, The metal sheet is provided with a plurality of air-permeable holes.
5. The half-closed loudspeaker module according to claim 2, characterized in that, The diameter of the air-permeable holes is smaller than the particle diameter of the sound-absorbing particles.
6. The half-closed loudspeaker module according to claim 5, characterized in that, The metal sheet prevents the sound-absorbing particles from separating from the rear cavity.
7. The half-closed loudspeaker module according to claim 1, characterized in that, The metal sheet is provided with a plurality of hot-melt holes.
8. The half-closed loudspeaker module according to claim 1, characterized in that, The module shell is provided with hot-melt columns matched with the hot-melt holes.
9. The half-closed loudspeaker module according to claim 8, characterized in that, The hot-melt columns are located in the rear cavity.
10. The half-chamber loudspeaker module of claim 1, wherein, The metal sheet has a recessed position, and the hot-melt holes are located in the recessed position. The number of the hot-melt columns is plural. At least two hot-melt columns are arranged away from each other. The loudspeaker module further comprises an air-permeable isolation member connected with the loudspeaker unit or the module shell. The air-permeable isolation member prevents the sound-absorbing particles from entering the interior of the loudspeaker unit. The loudspeaker unit is arranged obliquely in the inner cavity. The height of the area of the front cavity close to the sound outlet is greater than the height of the area of the front cavity away from the sound outlet. The metal sheet has a convex structure for avoiding the loudspeaker unit. The convex structure does not contact the loudspeaker unit. The edge of the metal sheet is adhesively fixed or hot-melt connected with the module shell.