A loudspeaker and electronic product

Abstract

The utility model belongs to the technical field of acoustic-electric conversion, disclose a kind of loudspeaker and electronic product.Loudspeaker includes loudspeaker body, front shell and mesh cover, and the loudspeaker body has sound chamber in, and one end of sound chamber is provided with limit step;Front shell is connected with the one end of loudspeaker body close to limit step, and first sound hole that is communicated with sound chamber is provided on front shell;Mesh cover includes the metal net and gas permeable membrane of laminated arrangement, and gas permeable membrane and metal net are fixed on limit step by hot-pressing process, and gas permeable membrane and metal net cover first sound hole.Electronic product includes shell and above-mentioned loudspeaker, and loudspeaker is installed in shell, and shell is provided with sound hole at the position corresponding to loudspeaker.The utility model can improve the connection firmness and sealing property between loudspeaker body and mesh cover, simplify assembly process, improve processing efficiency, increase loudspeaker service life, avoid mesh cover to fall off.

Description

Technical Field

[0001] This utility model relates to the field of sound-to-electric conversion technology, and in particular to a loudspeaker and electronic product. Background Technology

[0002] Loudspeakers are commonly used electroacoustic transducers in electronic products such as headphones, converting electrical signals into sound signals. The principle of loudspeaker sound production is as follows: When an audio current is passed through the voice coil of the loudspeaker, the voice coil generates an alternating magnetic field under the influence of the current. Simultaneously, a permanent magnet generates a constant magnetic field of unchanging magnitude and direction. Because the magnitude and direction of the magnetic field generated by the voice coil constantly change with the audio current, the interaction of these two magnetic fields causes the voice coil to move perpendicular to the direction of the current within it. Since the voice coil is connected to the diaphragm, this causes the diaphragm to vibrate, and the vibration of the diaphragm causes the air to vibrate, producing sound.

[0003] To prevent dust or moisture from entering the speaker and affecting its sound performance, a dust filter is usually installed on the speaker. Currently, most speaker dust filters are attached to the housing using double-sided adhesive. This method has two drawbacks: firstly, it results in poor sealing between the dust filter and the housing; secondly, the double-sided adhesive has low bonding precision and is prone to aging, causing the dust filter to detach and affecting the speaker's lifespan. Furthermore, existing speakers often require stacking many components depending on the application. If each layer of dust filter is individually stacked and bonded using double-sided adhesive, it leads to numerous assembly steps, complex processes, high costs, and a higher risk of assembly defects.

[0004] Therefore, there is an urgent need for a loudspeaker and electronic product to solve the above-mentioned technical problems. Utility Model Content

[0005] This utility model provides a loudspeaker and electronic product that can improve the connection and sealing between the loudspeaker body and the grille, simplify the assembly process, improve processing efficiency, increase the service life of the loudspeaker, and prevent the grille from falling off.

[0006] A loudspeaker, comprising:

[0007] The speaker body has a sound-producing cavity inside, and a limiting step is provided at one end of the sound-producing cavity;

[0008] The front housing is connected to one end of the speaker body near the limiting step, and the front housing is provided with a first sound-transmitting hole communicating with the sound-producing cavity;

[0009] The mesh cover includes a layered metal mesh and a breathable membrane. The breathable membrane and the metal mesh are fixed to the limiting step by a hot pressing process. The breathable membrane and the metal mesh cover the first sound-permeable hole.

[0010] In some embodiments, the speaker further includes:

[0011] The rear housing is connected to the end of the speaker body away from the limiting step, and the rear housing is provided with a second sound-transmitting hole that communicates with the sound-producing cavity.

[0012] In some embodiments, the speaker further includes:

[0013] The motherboard is fixed to the rear housing and is electrically connected to the rear housing;

[0014] A grounding component is disposed within the speaker body. One end of the grounding component is electrically connected to the metal mesh, and the other end of the grounding component is electrically connected to the rear housing.

[0015] In some embodiments, the speaker body is provided with a mounting hole, which is cut off along the height direction of the speaker body from one end away from the limiting step to the end that is connected to the limiting step;

[0016] The grounding component is a metal conductive rod, which is installed in the mounting hole, and its two ends are in electrical contact with the rear housing and the metal mesh, respectively.

[0017] In some embodiments, the loudspeaker further includes a vibration assembly disposed within the sound chamber; conductive terminals are soldered onto the main board, and a clearance opening is provided on the rear housing; the conductive terminals pass through the clearance opening and are fixed to the loudspeaker body; the main board is electrically connected to the vibration assembly through the conductive terminals.

[0018] In some embodiments, a positioning plate is fixed to the side of the rear housing away from the sound cavity, one end of the main board abuts against the positioning plate, and the positioning plate is provided with a third sound-transmitting hole communicating with the sound cavity.

[0019] In some embodiments, both the rear housing and the positioning plate are made of metal.

[0020] In some embodiments, a mounting groove is provided on the front housing, and the speaker body is fixed in the mounting groove by compression foam; and / or,

[0021] The metal mesh is closer to the first sound-permeable hole than the breathable membrane.

[0022] In some embodiments, the vibration assembly includes a magnetic circuit system, a voice coil, and a tympanic membrane, the tympanic membrane being fixed to the inner wall of the sound cavity; the voice coil being movably disposed within the sound cavity, one end of the voice coil being connected to the tympanic membrane; the main board being electrically connected to the voice coil, and the magnetic circuit system cooperating with the voice coil to drive the voice coil to vibrate.

[0023] An electronic product includes a housing and a speaker as described in any of the above embodiments, the speaker being installed inside the housing, and the housing having a sound outlet at a position corresponding to the speaker.

[0024] The beneficial effects of this utility model embodiment:

[0025] The speaker provided by this utility model features a limiting step within the speaker body, onto which the breathable membrane and metal mesh are fixed using a hot-pressing process. This not only improves the connection and sealing between the speaker body and the mesh, but also reduces processing steps, simplifies the assembly process, and increases processing efficiency. It avoids the cumbersome process of sequentially stacking and bonding the mesh with double-sided adhesive, and also prevents the aging of double-sided adhesive from affecting the speaker's lifespan, reducing the possibility of the mesh detaching. Furthermore, the mesh of this utility model is fixed to the sound chamber by hot pressing, reducing the stacking of parts during assembly, lowering manufacturing costs, and solving the potential problem of speaker assembly defects. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the loudspeaker provided in an embodiment of the present invention;

[0027] Figure 2 This is an exploded view of the loudspeaker provided in an embodiment of this utility model;

[0028] Figure 3 This is a cross-sectional view of the loudspeaker provided in an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the first angle structure of the speaker body provided in this embodiment of the utility model;

[0030] Figure 5 This is a schematic diagram of the second angle structure of the speaker body provided in an embodiment of the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Speaker body; 11. Sound chamber; 12. Limiting step; 13. Mounting hole; 2. Front housing; 21. First sound transmission hole; 22. Mounting groove; 3. Rear housing; 31. Second sound transmission hole; 32. Clearance opening; 4. Main board; 41. Conductive terminal; 51. Metal mesh; 52. Breathable membrane; 6. Grounding component; 7. Positioning plate; 71. Third sound transmission hole; 8. Compressed foam; 9. Drum. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0037] like Figures 1 to 5As shown, this embodiment of the utility model provides a loudspeaker, including a loudspeaker body 1, a vibration assembly, a front housing 2, a rear housing 3, a grille, and a main board 4. The loudspeaker body 1 has a cylindrical structure with both ends open, and has a sound-producing cavity 11 inside. The front end of the loudspeaker body 1 is connected to the front housing 2, and a first sound-permeable hole 21 is provided through the front housing 2 along the axial direction, communicating with the sound-producing cavity 11. The rear end of the loudspeaker body 1 is fixedly connected to the rear housing 3, and a second sound-permeable hole 31 is provided through the rear housing 3 along the axial direction, communicating with the sound-producing cavity 11. The vibration assembly is disposed inside the sound-producing cavity 11. Specifically, the vibration assembly includes a magnetic circuit system, a voice coil, and a diaphragm 9. The outer periphery of the diaphragm 9 is fixedly connected to the inner wall of the sound chamber 11. The voice coil is movably disposed within the sound chamber 11 along the axial direction of the speaker body 1, and one end of the voice coil is connected to the diaphragm 9, thereby driving the diaphragm 9 to vibrate. The main board 4 is fixed to the rear housing 3 and electrically connected to the voice coil, used to provide audio signals to the voice coil. The magnetic circuit system is fixed to the speaker body 1 and includes a magnet and a magnetic guide plate, used to cooperate with the voice coil to make the voice coil vibrate. It should be noted that in this embodiment, the front end of the speaker body 1 refers to the end near the front housing 2, and the rear end of the speaker body 1 refers to the end near the rear housing 3. The space between the diaphragm 9 and the front housing 2 is specifically the front sound cavity, which is connected to the first sound transmission hole 21. The space between the diaphragm 9 and the rear housing 3 is specifically the rear sound cavity, which is connected to the second sound transmission hole 31.

[0038] In this embodiment, the mesh cover is fixed to the end of the sound chamber 11 near the first sound-permeable hole 21, and the mesh cover covers the first sound-permeable hole 21. By setting the mesh cover, dust and moisture can be effectively prevented from entering the sound chamber 11, thus avoiding dust and moisture affecting the sound quality of the speaker. Specifically, a limiting step 12 is provided at the end of the sound chamber 11 near the first sound-permeable hole 21. The mesh cover is fixed to the limiting step 12 by a hot-pressing process. This can improve the firmness of the connection between the mesh cover and the speaker body 1, increase the sealing performance between the mesh cover and the speaker body 1 and the front housing 2, and the hot-pressing of the mesh cover into the speaker body 1 is completed in one piece on a fully automated speaker production line, which has high processing efficiency and lower processing cost compared to stacking cost; it also avoids the problem of double-sided adhesive aging affecting service life that is prone to occur when using double-sided adhesive. In this embodiment, the speaker body 1 is preferably made of plastic. By heating and softening the material and applying appropriate pressure, the speaker body 1 and the mesh cover can be hot-riveted together to ensure the reliability of the connection.

[0039] Optionally, the mesh cover in this embodiment includes a layered metal mesh 51 and a breathable membrane 52, wherein the metal mesh 51 is closer to the first sound-permeable hole 21 than the breathable membrane 52. The metal mesh 51 and the breathable membrane 52 are integrally fixed to the limiting step 12 by a hot-pressing process, which further improves processing efficiency and avoids the complicated process of sequentially stacking and bonding with double-sided adhesive. In this embodiment, the metal mesh 51 acts as a physical barrier for the speaker, effectively preventing dust and particulate matter from entering the speaker's interior (such as the voice coil, magnetic gap, and other precision areas), avoiding noise, diaphragm deformation, or component wear caused by foreign matter accumulation, and effectively extending the speaker's service life. The breathable membrane 52 can be a waterproof and breathable membrane, such as a breathable film made of expanded polytetrafluoroethylene (ePTFE), which achieves waterproofing through a microporous structure while allowing air molecules to pass through, thereby balancing the air pressure difference inside and outside the speaker, avoiding air pressure imbalance caused by temperature changes or altitude differences, and preventing diaphragm deformation and acoustic performance degradation. Of course, in some embodiments, the breathable membrane 52 can also be other membranes with breathable functions. Optionally, the metal mesh 51 may be made of stainless steel or electroplated steel.

[0040] Furthermore, the front end of the speaker body 1 is bonded and sealed to the front housing 2 using compressed foam 8. In this embodiment, compressed foam 8 refers to a type of functional material whose original foam volume is compressed to less than 60% of its original thickness through a special process. For example, compressed foam 8 can be polyvinyl alcohol (PVA) compressed cotton. In this embodiment, the use of compressed foam 8 between the speaker body 1 and the front housing 2 achieves a good sealing effect, preventing sound leakage from gaps. Moreover, the bonded and fixed connection of compressed foam 8 to both the speaker body 1 and the front housing 2 improves the connection strength between the speaker body 1 and the front housing 2. Specifically, the front housing 2 in this embodiment is provided with an annular mounting groove 22. The compressed foam 8 is annular in structure and bonded and fixed within the mounting groove 22. The front end of the speaker body 1 is bonded and fixed to the compressed foam 8. By providing the mounting groove 22, installation is facilitated, assembly accuracy is improved, and the sealing effect between the speaker body 1 and the front housing 2 is further guaranteed.

[0041] The speaker provided in this embodiment first uses a hot-pressing process to attach the grille to the inside of the speaker body 1. Then, the front end of the speaker body 1 is bonded and sealed to the front housing 2 using compressed foam 8. This improves the connection and sealing between the speaker body 1 and the grille, as well as between the grille and the front housing 2, reducing the possibility of the grille falling off and increasing the speaker's service life. Furthermore, the speaker in this embodiment has fewer manufacturing processes and steps. The speaker body 1, rear housing 3, main board 4, vibration component, and grille can be processed into a single speaker assembly. In subsequent assembly processes, this speaker assembly only needs to be bonded to the front housing 2 using compressed foam 8, greatly reducing the stacking of parts during assembly, lowering manufacturing costs, and solving the problem of poor speaker assembly.

[0042] Furthermore, in existing technologies, since the mesh cover typically lacks a grounding structure, static electricity on the mesh cover cannot be eliminated, easily leading to dust blockage and abnormal speaker sound. Therefore, in this embodiment, the speaker body 1 is also equipped with a grounding component 6. One end of the grounding component 6 is electrically connected to the metal mesh 51, and the other end is electrically connected to the rear housing 3. Optionally, the grounding component 6 and the rear housing 3 are both made of metal, and the rear housing 3 is electrically connected to the main board 4. This allows static electricity on the metal mesh 51 to be conducted to the main board 4 via the grounding component 6 and the rear housing 3, achieving grounding and discharging of static electricity and preventing mesh blockage due to static electricity on the metal mesh 51.

[0043] Optionally, in this embodiment, the speaker body 1 has a mounting hole 13 extending along its height direction (i.e., the axial direction of the speaker body 1). One end of the mounting hole 13, away from the limiting step 12, passes through the rear end of the speaker body 1, and the other end of the mounting hole 13 extends forward beyond the limiting step 12 and communicates with the sound chamber 11. The grounding component 6 is specifically a metal conductive rod, which is installed in the mounting hole 13. One end of the metal conductive rod passes through the mounting hole 13 and makes electrical contact with the rear housing 3, while the other end protrudes into the sound chamber 11 and makes electrical contact with the metal mesh 51 inside the sound chamber 11. The metal conductive rod has a simple structure, is easy to install, and has good conductivity, ensuring the reliability of static electricity discharge. Specifically, in this embodiment, the speaker body 1 has two symmetrically arranged mounting holes 13 for installing two metal conductive rods to improve the static electricity discharge efficiency.

[0044] Furthermore, in existing technologies, to connect the speaker body to the motherboard, a motherboard spring is typically required. This spring connects to conductive pins, which in turn connect to the speaker body. This assembly process is complex and prone to poor assembly between the motherboard and the speaker body, as well as poor electrical conductivity between the motherboard and the vibration assembly. To address these issues, in this embodiment, two conductive terminals 41 are integrally welded to both sides of the motherboard 4. Two clearance openings 32 are provided on the rear housing 3. The two conductive terminals 41 pass through their respective clearance openings 32 and are fixed to the speaker body 1. This achieves stable fixation between the speaker body 1 and the motherboard 4, simplifying assembly and ensuring a reliable connection. Simultaneously, the motherboard 4 is also directly electrically connected to the voice coil in the vibration assembly via the conductive terminals 41, ensuring good electrical conductivity. This embodiment uses conductive terminals 41 to fix the speaker body 1 and the motherboard 4, integrating them into a single unit and resolving potential problems such as poor assembly between the motherboard 4 and the speaker body 1, and poor electrical conductivity between the motherboard 4 and the vibration assembly.

[0045] Optionally, in this embodiment, a positioning plate 7 is also fixed on the side of the rear housing 3 away from the sound chamber 11, and the bottom end of the main board 4 abuts against the positioning plate 7. Specifically, the bottom end of the main board 4 can be fixed to the positioning plate 7 by means of adhesive bonding, welding, etc. In this embodiment, by setting the positioning plate 7, the bottom end of the main board 4 can abut against and be fixed to the positioning plate 7, which improves the support and fixing reliability of the main board 4. Furthermore, the main board 4 is vertically fixed to the positioning plate 7, so that the speaker body 1 and the main board 4 can be kept in a vertical state, avoiding the speaker body 1 from being assembled crookedly. In addition, the positioning plate 7 is also provided with a third sound transmission hole 71, which communicates with the sound chamber 11 to facilitate sound transmission. Optionally, in this embodiment, the positioning plate 7 is made of metal, which has good structural strength and facilitates electrical conduction through the metal rear housing 3 and the metal grounding member 6, and also facilitates electrical conduction with the main board 4.

[0046] This embodiment also provides an electronic product, including a housing and the aforementioned speaker. The speaker is installed inside the housing, and the housing has a sound outlet at the position corresponding to the speaker to output sound. Specifically, the electronic product of this embodiment can be headphones, headphone cases, mobile phones, tablets, laptops, smartwatches, etc. For example, the electronic product of this embodiment is a Bluetooth headphone case, with the speaker located on the Bluetooth headphone case. This allows the Bluetooth headphone case to take over and continue playing sound when the Bluetooth headphones are low on power. That is, while the Bluetooth headphones are charging in the Bluetooth headphone case, the user can continue playing music without having to stop and wait, improving convenience.

[0047] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A loudspeaker, characterized in that, include: The speaker body has a sound-producing cavity inside, and a limiting step is provided at one end of the sound-producing cavity; The front housing is connected to one end of the speaker body near the limiting step, and the front housing is provided with a first sound-transmitting hole communicating with the sound-producing cavity; The mesh cover includes a layered metal mesh and a breathable membrane. The breathable membrane and the metal mesh are fixed to the limiting step by a hot pressing process. The breathable membrane and the metal mesh cover the first sound-permeable hole.

2. The loudspeaker according to claim 1, characterized in that, The speaker also includes: The rear housing is connected to the end of the speaker body away from the limiting step, and the rear housing is provided with a second sound-transmitting hole that communicates with the sound-producing cavity.

3. The loudspeaker according to claim 2, characterized in that, The speaker also includes: The motherboard is fixed to the rear housing and is electrically connected to the rear housing; A grounding component is disposed within the speaker body. One end of the grounding component is electrically connected to the metal mesh, and the other end of the grounding component is electrically connected to the rear housing.

4. The loudspeaker according to claim 3, characterized in that, The speaker body has a mounting hole, which is cut along the height direction of the speaker body from the end away from the limiting step to the end that is connected to the limiting step; The grounding component is a metal conductive rod, which is installed in the mounting hole, and its two ends are in electrical contact with the rear housing and the metal mesh, respectively.

5. The loudspeaker according to claim 3, characterized in that, The loudspeaker also includes a vibration assembly disposed within the sound chamber; conductive terminals are soldered onto the main board, and a clearance opening is provided on the rear housing; the conductive terminals pass through the clearance opening and are fixed to the loudspeaker body; the main board is electrically connected to the vibration assembly through the conductive terminals.

6. The loudspeaker according to claim 3, characterized in that, A positioning plate is fixed to the side of the rear housing away from the sound cavity, and one end of the main board abuts against the positioning plate. The positioning plate is provided with a third sound-transmitting hole that communicates with the sound cavity.

7. The loudspeaker according to claim 6, characterized in that, Both the rear housing and the positioning plate are made of metal.

8. The loudspeaker according to claim 1, characterized in that, The front housing is provided with a mounting groove, and the speaker body is fixed in the mounting groove by compression foam; and / or The metal mesh is closer to the first sound-permeable hole than the breathable membrane.

9. The loudspeaker according to claim 5, characterized in that, The vibration assembly includes a magnetic circuit system, a voice coil, and a tympanic membrane. The tympanic membrane is fixed to the inner wall of the sound cavity. The voice coil is movably disposed within the sound cavity, and one end of the voice coil is connected to the tympanic membrane. The main board is electrically connected to the voice coil, and the magnetic circuit system cooperates with the voice coil to drive the voice coil to vibrate.

10. An electronic product, comprising a casing, characterized in that, It also includes a loudspeaker as described in any one of claims 1-9, wherein the loudspeaker is installed inside the housing, and the housing has a sound outlet at a position corresponding to the loudspeaker.

Images