Loudspeaker and sound producing device

Abstract

The utility model discloses a loudspeaker and sounding device, including shell, magnetic circuit system, vibration system and electric connection piece, magnetic circuit system includes first magnetic plate, second magnetic plate and first magnet, and vibration system is located the both sides of magnetic circuit system, and vibration system is arranged in the shell with magnetic circuit system, and electric connection piece sets up on the shell. Among them, the second magnetic plate is connected with the first magnetic plate. The connection of second magnetic plate and first magnetic plate effectively increases the stability of loudspeaker structure.

Description

Technical Field

[0001] This utility model relates to the field of sound-generating device technology, specifically to a loudspeaker and a sound-generating device. Background Technology

[0002] In recent years, due to the increasing demand for thinner and lighter electronic products, the assembly space for loudspeakers has become correspondingly smaller. To meet these space requirements, existing technologies employ ultra-thin loudspeaker designs with dual diaphragms back-to-back to address the reduction in assembly space. This technology maximizes loudspeaker efficiency by incorporating two diaphragms within a single loudspeaker. However, the inclusion of two diaphragms complicates the corresponding voice coil setup and magnetic circuit structure. Furthermore, the reduced available space makes it difficult to effectively position the various components of the magnetic circuit structure, affecting the stability of the loudspeaker structure. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a loudspeaker and a sound-generating device that effectively positions the magnet and improves the stability of the structure.

[0004] In a first aspect, embodiments of the present invention provide a loudspeaker, comprising:

[0005] The outer casing has a receiving cavity;

[0006] A magnetic circuit system is disposed within the accommodating cavity. The magnetic circuit system includes a first magnetic plate, a second magnetic plate, and a first magnet. The first magnetic plate is connected to the outer shell, the second magnetic plate is connected to the first magnetic plate, and the first magnet is disposed on the second magnetic plate.

[0007] The vibration system includes a first vibration structure and a second vibration structure located on opposite sides of the magnetic circuit system, and both the first vibration structure and the second vibration structure are connected to the outer shell;

[0008] An electrical connector is disposed on the housing, and the electrical connector electrically connects the first vibration structure, the second vibration structure and an external power source.

[0009] Optionally, the second magnetic plate includes a central magnetic plate and a side magnetic plate connected to the central magnetic plate. The side magnetic plate is disposed along the periphery of the central magnetic plate. The first magnetic plate includes an annular portion and a contact portion connected to the inner edge of the annular portion. The annular portion is connected to the outer shell, and the contact portion is connected to the side magnetic plate to form a cavity.

[0010] Optionally, the magnetic circuit system further includes a second magnet, which is fixedly disposed within the cavity, and the central magnetic guide plate is disposed inside the annular portion, forming a gap with the contact portion.

[0011] Optionally, the side magnetic guide plate includes a first parallel magnetic guide plate and claws disposed at both ends along the length of the first parallel magnetic guide plate. The first parallel magnetic guide plate is connected to the central magnetic guide plate, and the two claws extend toward the contact portion and are connected to both sides of the contact portion.

[0012] Optionally, the central magnetic guide plate includes a second parallel magnetic guide plate and a partition plate. The partition plate is disposed between the first magnet and the second magnet. The first parallel magnetic guide plate and the second parallel magnetic guide plate are respectively connected to the two sides of the partition plate. The partition plate and the first magnet form a second magnetic gap, and the partition plate and the second magnet form a first magnetic gap.

[0013] Optionally, the magnetic circuit system further includes a third magnetic guide plate, which is disposed on the side of the first magnet away from the second parallel magnetic guide plate.

[0014] Optionally, the first vibrating structure includes a first diaphragm and a first voice coil. The first diaphragm includes a first central portion and a first folded ring portion connected to the outer edge of the first central portion. The first folded ring portion protrudes toward the side of the second magnetic plate. The first voice coil is connected to the side of the first central portion near the second magnetic plate and is located within the first magnetic gap.

[0015] Optionally, the second vibration structure includes a second diaphragm and a second voice coil. The second diaphragm includes a second central portion and a second folded ring portion connected to the outer edge of the second central portion. The second folded ring portion protrudes toward the side of the third magnetic plate. The second voice coil is connected to the side of the second central portion near the second magnetic plate and is located within the second magnetic gap.

[0016] Optionally, the outer casing includes a first housing and a second housing, the first housing and the second housing are connected, the edge of the first vibration structure is connected to the lower edge of the first housing, the edge of the second vibration structure is connected to the upper edge of the second housing, and the first vibration structure, the first housing, the second housing and the second vibration structure form an accommodating cavity.

[0017] Optionally, grooves are provided on the upper and lower sides of the first magnetic plate, the first housing is injection molded on the outside of the first magnetic plate and a protrusion is injection molded in the groove, and a positioning ring groove is formed in the first housing in a shape that conforms to the first magnetic plate, and the protrusion is disposed in the positioning ring groove.

[0018] Optionally, the loudspeaker further includes a first conductive element connected to the first voice coil. The first conductive element is disposed on the first diaphragm and extends outward to form a first contact element, which is electrically connected to the electrical connector.

[0019] Optionally, the loudspeaker further includes a second conductive element connected to the second voice coil. The second conductive element is disposed on the second diaphragm and extends outward to form a second contact element, which is electrically connected to the electrical connector.

[0020] Optionally, the second magnetic plate has clearance grooves at both ends in the length direction, and the clearance grooves correspond to the positions of the first conductive element.

[0021] Secondly, this utility model embodiment provides a sound-generating device, including:

[0022] speaker;

[0023] The motherboard is electrically connected to the speaker.

[0024] This utility model provides a loudspeaker and a sound-generating device, including a housing, a magnetic circuit system, a vibration system, and electrical connectors. The magnetic circuit system includes a first magnetic guide plate, a second magnetic guide plate, and a first magnet. The vibration system is located on both sides of the magnetic circuit system and is disposed within the housing. The electrical connectors are disposed on the housing. The second magnetic guide plate is connected to the first magnetic guide plate. This connection effectively increases the stability of the loudspeaker structure. Attached Figure Description

[0025] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:

[0026] Figure 1 This is a three-dimensional structural diagram of a loudspeaker according to an embodiment of the present invention;

[0027] Figure 2 This is a top view schematic diagram of a speaker according to an embodiment of the present invention;

[0028] Figure 3 This is a cross-sectional view of a loudspeaker along its length according to an embodiment of the present invention;

[0029] Figure 4 This is a cross-sectional view of a loudspeaker along the width direction according to an embodiment of the present invention;

[0030] Figure 5 This is an exploded view of a loudspeaker according to an embodiment of the present invention;

[0031] Figure 6 This is a three-dimensional structural diagram of a partial magnetic circuit system according to an embodiment of the present invention;

[0032] Figure 7This is an exploded structural diagram showing the positional relationship between the first magnetic plate, the second magnetic plate, and the third magnetic plate at an angle according to an embodiment of the present invention.

[0033] Figure 8 This is an exploded structural diagram showing the positional relationship between the first magnetic plate, the second magnetic plate, and the third magnetic plate in one embodiment of the present invention at another angle.

[0034] Explanation of reference numerals in the attached figures:

[0035] 11-First magnet; 12-Second magnet; 2-Second magnetic guide plate; 21-Center magnetic guide plate; 211-Allowing groove; 212-Second parallel magnetic guide plate; 213-Partition; 22-Side magnetic guide plate; 221-First parallel magnetic guide plate; 222-Claw; 3-First magnetic guide plate; 31-Annular portion; 32-Contact portion; 33-Groove; 4-First vibration structure; 41-First diaphragm; 411-First folded ring portion; 412-First center portion; 42-First voice coil; 43-First conductor; 431-First contact Components; 44-First extension; 51-First housing; 511-Protrusion; 512-Positioning ring groove; 513-First opening; 514-First bearing part; 52-Second housing; 523-Second opening; 524-Second bearing part; 53-Electrical connector; 6-Third magnetic plate; 7-Reinforcing part; 8-Second vibration structure; 81-Second diaphragm; 811-Second folded ring part; 812-Second center part; 82-Second voice coil; 83-Second conductive element; 831-Second contact element; 84-Second extension. Detailed Implementation

[0036] The present application is described below based on embodiments, but it is not limited to these embodiments. In the detailed description of the present application below, certain specific details are described in detail. Those skilled in the art can fully understand the present application without these details. To avoid obscuring the substance of the present application, well-known methods, processes, flows, elements, and circuits are not described in detail.

[0037] Furthermore, those skilled in the art should understand that the accompanying drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale.

[0038] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] For ease of explanation, spatially related terms such as “inside,” “outside,” “below,” “below,” “lower,” “above,” “upper,” etc., are used herein to describe the relationship between one element or feature illustrated in the figure and another. It will be understood that spatially related terms may be intended to encompass different orientations of the device in use or operation besides those depicted in the figure. For example, if the device in the figure is flipped, an element described as “below” or “below” another element or feature would then be positioned “above” that other element or feature. Thus, the exemplified term “below” can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially related descriptive terms used herein should be interpreted accordingly.

[0040] Unless the context explicitly requires it, words such as "including" or "contains" throughout the application should be interpreted as including rather than exclusive or exhaustive; that is, meaning "including but not limited to".

[0041] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0042] Figure 2 This is a top view schematic diagram of a speaker according to an embodiment of the present invention. Figure 3 , Figure 4 They are shown respectively Figure 2 A cross-sectional view showing the cross-section formed by cutting along the AA and BB directions.

[0043] Reference Figures 1-5The loudspeaker of this embodiment includes a housing, a magnetic circuit system, a vibration system, and an electrical connector 53. The housing has a receiving cavity, and the magnetic circuit system is disposed within the receiving cavity to provide a magnetic field for the vibration system. The vibration system includes a first vibration structure 4 and a second vibration structure 8 located on opposite sides of the magnetic circuit system, both connected to the housing. The electrical connector 53 is disposed on the housing and electrically connects the first vibration structure 4, the second vibration structure 8, and an external power source. The magnetic circuit system includes a first magnetic guide plate 3, a second magnetic guide plate 2, a third magnetic guide plate 6, a first magnet 11, and a second magnet 12. The first magnetic guide plate 3 is connected to the housing, the second magnetic guide plate 2 is connected to the first magnetic guide plate 3, and the first magnet 11 is disposed on the second magnetic guide plate 2, positioning the second magnet 12. The second magnet 12 and the second magnetic guide plate 2 form a first magnetic gap. Depending on the actual situation, the magnetic circuit system also includes a third magnetic guide plate 6, which is stacked on the second magnetic guide plate 2 from the outside to the inside along with the first magnet 11. The first magnet 11 and the second magnetic guide plate 2 form a second magnetic gap. The first vibration structure 4 and the second vibration structure 8 convert electrical energy into mechanical energy and drive the air to vibrate and produce sound. The voice coils of the first vibration structure 4 and the second vibration structure 8 extend into the first magnetic gap and the second magnetic gap, respectively, that is, they are set at the point of maximum magnetic flux in the magnetic circuit system.

[0044] Reference Figures 3-5 The first magnetic guide plate 3 includes an annular portion 31 and a contact portion 32 connected to the inner edge of the annular portion 31. Depending on the actual situation, two contact portions 32 are typically located on opposite sides of the inner edge of the annular portion 31. The annular portion 31 is connected to the outer casing, and the contact portions 32 are used to contact the second magnet 12 and connect to the side magnetic guide plate 22 to form a cavity accommodating the second magnet 12. The first magnetic guide plate 3 is essentially a ring structure, which improves the uniformity of the entire magnetic field, enhances structural rigidity, and improves structural stability. Furthermore, using an integral ring structure instead of a segmented arrangement allows for better magnetic circuit conduction, reduces magnetic resistance, and maximizes the concentration of magnetic flux generated by the first magnet 11 and the second magnet 12 within the first and second magnetic gaps, ultimately improving the speaker's sensitivity and sound performance. The ring structure also matches the shape of the voice coil and the first magnet 11 and the second magnet 12, effectively improving space utilization.

[0045] To fully utilize space and enhance structural stability, grooves 33 or protrusions are typically provided on the annular portion 31 of the first magnetic plate 3 to facilitate a tighter fit with the outer casing. Forming the outer casing using injection molding or similar methods further enhances the fit between the outer casing and the annular portion 31, improving structural stability. The outer casing can be integrally molded or formed by separately molding the first and second casings. In some embodiments, refer to... Figures 5-8The annular portion 31 has grooves 33 on its upper and lower sides. The first housing 51 is injection molded on the outer side of the annular portion 31, and a protrusion 511 is injection molded within the grooves 33. Specifically, to achieve more effective positioning, grooves 33 are typically formed on the upper and lower surfaces of the annular portion 31, which cooperate with the protrusion 511 of the injection-molded first housing 51 to achieve positioning perpendicular to the protrusion 511. Depending on the actual situation, to further position the annular portion 31, the injection-molded first housing 51 can also be positioned along the edge of the annular portion 31 in a direction perpendicular to the protrusion 511. (See reference...) Figure 5 , Figures 7-8 Through injection molding, a positioning annular groove 512, which is shaped to conform to the annular portion 31, is formed in the first housing 51, and a protrusion 511 is disposed in the positioning annular groove 512. The protrusion 511 cooperates with the positioning annular groove 512, and the first magnetic plate 3 is positioned by the annular portion 31, which improves the stability of the speaker and reduces space waste.

[0046] Reference Figure 5 , Figure 6 , Figure 7 , Figure 8 The second magnetic guide plate 2 includes a central magnetic guide plate 21 and side magnetic guide plates 22 connected to the central magnetic guide plate 21. The side magnetic guide plates 22 are arranged along the periphery of the central magnetic guide plate 21. Depending on the actual situation, two side magnetic guide plates 22 are typically arranged symmetrically on both sides of the central magnetic guide plate 21. Specifically, the central magnetic guide plate 21 has an upward-opening U-shaped cross-section in the width direction of the speaker, and the side magnetic guide plates 22 have a downward-opening U-shaped cross-section in the length direction of the speaker. The two side magnetic guide plates 22 are respectively connected to two contact portions 32 to form two cavities, which are used to accommodate the second magnet 12. The central magnetic guide plate 21 is located between the two contact portions 32, forming a gap between the central magnetic guide plate 21 and the two contact portions 32 to facilitate the passage of the voice coil.

[0047] In some embodiments, refer to Figure 5 , Figure 6 , Figure 7 , Figure 8Each side magnetic guide plate 22 includes a first parallel magnetic guide plate 221 and claws 222 disposed at both ends along the length of the first parallel magnetic guide plate 221. The first parallel magnetic guide plate 221 is connected to the central magnetic guide plate 21, and the two claws 222 extend toward the contact portion 32 and connect to both sides of the contact portion 32. Depending on the actual situation, the width of the claws 222 is usually smaller than that of the first parallel magnetic guide plate 221 to leave a gap for easy installation and to allow space for other structures such as the voice coil to pass through. Specifically, the dimensions of the first parallel magnetic guide plate 221 and the contact portion 32 are close to or equal to those of the first parallel magnetic guide plate 221, so that the claws 222 and the contact portion 32 can be tightly engaged, improving structural stability. The height of the claws 222 is approximately the same as or the same as the height of the second magnet 12. When the claws 222 engage with the contact portion 32, the cavity formed allows the second magnet 12 to be positioned precisely, preventing it from sliding and colliding with the voice coil or other structures and affecting the speaker performance. At this time, a second magnetic gap is formed between the second magnet 12 and the central magnetic guide plate 21. Preferably, the height of the claws 222 is set to be the same as the height of the second magnet 12 to maximize the use of the space inside the speaker. To improve stability, the two claws 222 can be fixed to the contact portion 32 by welding or gluing.

[0048] In some embodiments, refer to Figure 5 , Figure 6 , Figure 7 , Figure 8 The central magnetic guide plate 21 includes a second parallel magnetic guide plate 212 and a partition 213. The partition 213 is disposed between the first magnet 11 and the second magnet 12. The first parallel magnetic guide plate 221 and the second parallel magnetic guide plate 212 are connected to the two sides of the partition 213, respectively. The partition 213 and the first magnet 11 form a second magnetic gap, and the partition 213 and the second magnet 12 form a first magnetic gap. Depending on the actual situation, two partitions 213 are usually provided, and each partition 213 is connected to one of the two first parallel magnetic guide plates 221. That is, the second parallel magnetic guide plate 212, the partition 213, and the first parallel magnetic guide plate 221 form an inverted Ω shape. Since the width of the claw 222 is smaller than that of the first parallel magnetic guide plate 221, a gap is formed between the partition 213 and the claw 222, leaving space for the voice coil to move.

[0049] Reference Figure 6 The third magnetic plate 6 is positioned on the side of the first magnet 11 away from the second parallel magnetic plate 212. The third magnetic plate 6 and the first magnet 11 are stacked sequentially on the central magnetic plate 21 from the outside in, and are magnetically attracted to the central magnetic plate 21 for positioning. A second magnetic gap is formed between the side of the first magnet 11 and the central magnetic plate 21 to allow the voice coil to pass through and provide a high-density magnetic flux path. Specifically, as... Figures 3-6As shown, the first magnet 11 is disposed on the second parallel magnetic plate 212 of the central magnetic plate 21, and there is a certain distance between the two sides of the first magnet 11 and the partition plate 213, namely the second magnetic gap.

[0050] Reference Figures 3-5 In this embodiment, the loudspeaker is provided with two sets of vibration structures. The first vibration structure 4 is located on the side of the outer casing away from the first magnetic plate 3 and extends into the first magnetic gap. The second vibration structure 8 is located on the outer casing near the first magnetic plate 3 and extends into the second magnetic gap. Specifically, as... Figures 3-5 As shown, the first vibrating structure 4 includes a first diaphragm 41 and a first voice coil 42, and the second vibrating structure 8 includes a second diaphragm 81 and a second voice coil 82. The first voice coil 42 and the second voice coil 82 extend into the first magnetic gap and the second magnetic gap, respectively. For the first voice coil 42, its annular structure passes through the first magnetic gap and the gap formed between the second parallel magnetic plate 212 and the annular portion 31. For the second voice coil 82, its annular structure surrounds the first magnet 11 and the third magnetic plate 6. When the first voice coil 42 and the second voice coil 82 are energized and vibrate, they move up and down in the first magnetic gap and the second magnetic gap, respectively, and drive the diaphragm to vibrate, realizing the conversion of electrical energy into mechanical energy.

[0051] Reference Figures 3-5 For the first vibrating structure 4, the first voice coil 42 is connected to the side of the first diaphragm 41 near the central magnetic plate 21, and the first voice coil 42 is located within the first magnetic gap. The first diaphragm 41 includes a first central portion 412 and a first loop portion 411 connected to the outer edge of the first central portion 412, and the first voice coil 42 is connected to the first central portion 412. The first loop portion 411 protrudes towards the central magnetic plate 21, reducing space occupation compared to the structure where the loop portion protrudes outward. Similarly, for the second vibrating structure 8, the second voice coil 82 is connected to the side of the second diaphragm 81 near the third magnetic plate 6, i.e., the first magnet 11, and the second voice coil 82 is located within the second magnetic gap. The second diaphragm 81 includes a second central portion 812 and a second loop portion 811 connected to the outer edge of the second central portion 812, the second voice coil 82 is connected to the second central portion 812, and the second loop portion 811 protrudes towards the third magnetic plate 6. In other words, the first folding ring 411 and the second folding ring 811 protrude in opposite directions, both protruding towards the inside of the speaker. This is a structure in which the upper and lower diaphragms are completely reversed, in order to optimize the space utilization of the speaker and achieve an ultra-thin speaker design.

[0052] In some embodiments, refer to Figure 3 , Figure 4The first diaphragm 41 and the second diaphragm 81 are further provided with reinforcing portions 7 on their exteriors to enhance the strength of the diaphragms, allowing the vibrations from the voice coil to propagate better and improving sound quality. The reinforcing portions 7 are respectively positioned between the first center portion 412 and the second center portion 812 to avoid affecting the bending state of the first loop portion 411 and the second loop portion 811. Depending on the actual situation, the reinforcing portions 7 can be connected by applying an adhesive layer or other methods. The material and thickness of the reinforcing portions 7 can also be adjusted according to actual needs to obtain optimal acoustic effects.

[0053] Furthermore, referring to Figure 1 , Figures 3-4 The speaker also includes a first housing 51 and a second housing 52. The first housing 51 is connected to the second housing 52. Depending on the actual situation, the connection between the first housing 51 and the second housing 52 can be achieved by various methods such as welding, bonding, or integral molding. The edge of the first vibrating structure 4 is connected to the lower edge of the first housing 51, and the edge of the second vibrating structure 8 is connected to the upper edge of the second housing 52, realizing the connection between the housing and the internal structure. Specifically, as shown... Figures 3-4 As shown, the edge of the first folded ring portion 411 is connected to the bottom edge of the first housing 51, and the edge of the second folded ring portion 811 is connected to the top edge of the second housing 52. The first vibration structure 4, the first housing 51, the second housing 52 and the second vibration structure 8 form a receiving cavity. The first magnetic plate 3, the second magnetic plate 2, the third magnetic plate 6, the first magnet 11 and the second magnet 12 are all disposed in the receiving cavity.

[0054] In some embodiments, refer to Figure 5The loudspeaker also includes a first conductive element 43 and a second conductive element 83. The first conductive element 43 is connected to the first voice coil 42 and is disposed on the first diaphragm 41, extending outward to form a first contact 431. The second conductive element 83 is connected to the second voice coil 82 and is disposed on the second diaphragm 81, extending outward to form a second contact 831. The first conductive element 43 and the second conductive element 83 are used to electrically connect the voice coil to an external circuit, allowing external current to control the vibration of the voice coil. Because the first diaphragm 41 and the second diaphragm 81 are reverse-mounted, using a flexible circuit board or enameled wire as the conductive structure would result in the different conductive structures on both sides being too close, easily causing vibration interference during vibration. Therefore, the first conductive element 43 and the second conductive element 83 are formed by spraying nano-conductive material. Specifically, both the first conductive element 43 and the second conductive element 83 include a conductive substrate and a nano-conductive material uniformly dispersed on the conductive substrate. The conductive substrate is made of a flexible and insulating material, such as silicone or rubber. The nano-conductive material includes one or more of gold, silver, copper, zinc, and graphite. The nano-conductive material is sprayed onto the conductive substrate to form the first conductive element 43 and the second conductive element 83. Depending on the actual situation, other conductive materials can also be used to make the first conductive element 43 and the second conductive element 83, such as thin conductive materials like conductive metal films.

[0055] Specifically, refer to Figures 3-5 The first conductive element 43 is attached to the side of the first diaphragm 41 near the central magnetic plate 21, with one end extending to be electrically connected to the voice coil and the other end extending to the edge of the surround portion for easy contact with external circuitry. Similarly, the first conductive element 43 is attached to the side of the first diaphragm 41 near the central magnetic plate 21, with one end extending to be electrically connected to the voice coil and the other end extending to the edge of the surround portion. Depending on the actual situation, the lengths of the first conductive element 43 and the second conductive element 83 may differ due to the different positions of the first voice coil 42 and the second voice coil 82. For example, in this embodiment, since the first voice coil 42 is disposed in the first magnetic gap, and the first magnetic gap is disposed outside the second magnetic gap, the circumference of the first voice coil 42 is longer, and the enclosed area is larger, making the first conductive element 43 connected to it relatively shorter than the second conductive element 83. In other embodiments, due to differences in the voice coil position and enclosed area, the lengths and dimensions of the first conductive element 43 and the second conductive element 83 may be opposite. To achieve more efficient conduction and form a complete circuit, two of each of the first conducting element 43 and the second conducting element 83 are provided, located at the two ends of the first diaphragm 41 and the second diaphragm 81 along their length, respectively. Depending on the actual situation and circuit planning, the number and location of the first conducting element 43 and the second conducting element 83 can also be different.

[0056] In some embodiments, refer to Figure 5The central magnetic plate 21 has clearance grooves 211 at both ends along its length. These clearance grooves 211 correspond to the positions of the first conductive element 43 and are used to avoid vibration of the first conductive element 43. Specifically, as shown... Figure 3 , Figure 5 As shown, clearance grooves 211 are formed at both ends of the second parallel magnetic plate 212 of the central magnetic plate 21. When the first diaphragm 41 vibrates, its first central portion 412 vibrates towards the second parallel magnetic plate 212, causing the first folded ring portion 411 to move. Since the first folded ring portion 411 itself protrudes inward, clearance grooves 211 are formed at both ends of the second parallel magnetic plate 212 to prevent the first conductive member 43 on the first folded ring portion 411 and part of the first central portion 412 from colliding with the second parallel magnetic plate 212. The size and shape of the clearance grooves 211 are set according to the size and shape of the first conductive member 43, depending on the actual situation.

[0057] In some embodiments, to better ensure electrical connection between the first conductive member 43 and the second conductive member 83 and the outside world, a support portion is provided to support the connection between the conductive member and the electrical connector 53. (Refer to...) Figures 3-5 The first housing 51 has first support portions 514 protruding at both ends in the length direction, and the second housing 52 has second support portions 524 protruding at both ends in the length direction, corresponding to the positions of the first support portions 514. The first support portions 514 and the second support portions 524 are respectively used to connect electrical connectors 53 and provide effective support. The electrical connectors 53 are respectively disposed on the first support portions 514 and the second support portions 524. Correspondingly, the first vibrating structure 4 has first extension portions 44 protruding at both ends in the length direction, corresponding to the positions of the first support portions 514. The first support portions 514 and the first extension portions 44 are connected. The first contact portion 32 formed by the first conductive portion extends to the first extension portion 44 and is electrically connected to the electrical connectors 53, realizing the electrical connection between the first voice coil 42 and the external circuit. Similarly, the second vibrating structure 8 has second extension portions 84 protruding at both ends in the length direction, corresponding to the positions of the second support portions 524. The second support portions 524 and the second extension portions 84 are connected, realizing the electrical connection between the second voice coil 82 and the external circuit. After receiving the electrical signal transmitted from the outside, the first voice coil 42 and the second voice coil 82 vibrate in the first magnetic gap and the second magnetic gap respectively, which in turn drive the first diaphragm 41, the second diaphragm 81 and the reinforcing part 7 to vibrate, causing the air to vibrate and produce sound.

[0058] In some embodiments, refer to Figure 1 , Figure 3The first housing 51 has an upward-opening first opening 513 at one end, and the second housing 52 has a downward-opening second opening 523 at one end. The first opening 513 and the second opening 523 are positioned correspondingly and surround each other to form a housing aperture. The housing aperture is used for heat dissipation of the speaker and forms an inlet and outlet for air circulation, so as to allow air vibration to produce sound.

[0059] Based on this, the present invention also provides a sound-generating device. Specifically, the sound-generating device of this application includes a loudspeaker and a main board. The main board is electrically connected to the loudspeaker and is used to receive electrical signals and control the loudspeaker to generate sound. Because the loudspeaker of this application has the characteristics of being ultra-thin, having high space utilization, and having a stable structure, it can be used to manufacture a very small sound-generating device.

[0060] This application provides a loudspeaker and a sound-generating device. The loudspeaker includes a housing, a magnetic circuit system, a vibration system, and electrical connectors. The magnetic circuit system includes a first magnetic plate, a second magnetic plate, and a first magnet. The vibration system is located on both sides of the magnetic circuit system and is disposed within the housing. The electrical connectors are disposed on the housing. The second magnetic plate is connected to the first magnetic plate. This connection effectively increases the stability of the loudspeaker structure.

[0061] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A loudspeaker, characterized in that, The loudspeaker includes: The outer casing has a receiving cavity; A magnetic circuit system is disposed within the accommodating cavity. The magnetic circuit system includes a first magnetic guide plate (3), a second magnetic guide plate (2), and a first magnet (11). The first magnetic guide plate (3) is connected to the outer shell, the second magnetic guide plate (2) is connected to the first magnetic guide plate (3), and the first magnet (11) is disposed on the second magnetic guide plate (2). The vibration system includes a first vibration structure (4) and a second vibration structure (8) located on opposite sides of the magnetic circuit system, and both the first vibration structure (4) and the second vibration structure (8) are connected to the outer shell; An electrical connector (53) is disposed on the housing, and the electrical connector (53) electrically connects the first vibration structure (4), the second vibration structure (8) and an external power source.

2. The loudspeaker according to claim 1, characterized in that, The second magnetic plate (2) includes a central magnetic plate (21) and a side magnetic plate (22) connected to the central magnetic plate (21). The side magnetic plate (22) is arranged along the periphery of the central magnetic plate (21). The first magnetic plate (3) includes an annular portion (31) and a contact portion (32) connected to the inner edge of the annular portion (31). The annular portion (31) is connected to the outer shell, and the contact portion (32) is connected to the side magnetic plate (22) to form a cavity.

3. The loudspeaker according to claim 2, characterized in that, The magnetic circuit system further includes a second magnet (12), which is fixedly disposed in the cavity. The central magnetic guide plate (21) is disposed inside the annular portion (31) and forms a gap with the contact portion (32).

4. The loudspeaker according to claim 3, characterized in that, The side magnetic guide plate (22) includes a first parallel magnetic guide plate (221) and claws (222) disposed at both ends of the first parallel magnetic guide plate (221) along its length. The first parallel magnetic guide plate (221) is connected to the center magnetic guide plate (21), and the two claws (222) extend toward the contact portion (32) and are connected to both sides of the contact portion (32).

5. The loudspeaker according to claim 4, characterized in that, The central magnetic plate (21) includes a second parallel magnetic plate (212) and a partition (213). The partition (213) is disposed between the first magnet (11) and the second magnet (12). The first parallel magnetic plate (221) and the second parallel magnetic plate (212) are respectively connected to the two sides of the partition (213). The partition (213) and the first magnet (11) form a second magnetic gap, and the partition (213) and the second magnet (12) form a first magnetic gap.

6. The loudspeaker according to claim 5, characterized in that, The magnetic circuit system further includes a third magnetic guide plate (6), which is disposed on the side of the first magnet (11) away from the second parallel magnetic guide plate (212).

7. The loudspeaker according to any one of claims 1-6, characterized in that, The first vibration structure (4) includes a first diaphragm (41) and a first voice coil (42). The first diaphragm (41) includes a first central portion (412) and a first folded ring portion (411) connected to the outer edge of the first central portion (412). The first folded ring portion (411) protrudes toward the side of the second magnetic plate (2). The first voice coil (42) is connected to the side of the first central portion (412) near the second magnetic plate (2). The first voice coil (42) is located within the first magnetic gap.

8. The loudspeaker according to claim 7, characterized in that, The second vibration structure (8) includes a second diaphragm (81) and a second voice coil (82). The second diaphragm (81) includes a second central portion (812) and a second folded ring portion (811) connected to the outer edge of the second central portion (812). The second folded ring portion (811) protrudes toward the side of the second magnetic plate (2). The second voice coil (82) is connected to the side of the second central portion (812) near the third magnetic plate (6). The second voice coil (82) is located within the second magnetic gap.

9. The loudspeaker according to claim 1, characterized in that, The outer shell includes a first shell (51) and a second shell (52), the first shell (51) and the second shell (52) are connected, the edge of the first vibration structure (4) is connected to the lower edge of the first shell (51), and the edge of the second vibration structure (8) is connected to the upper edge of the second shell (52). The first vibration structure (4), the first shell (51), the second shell (52) and the second vibration structure (8) form a receiving cavity.

10. The loudspeaker according to claim 9, characterized in that, The first magnetic plate (3) has grooves (33) on its upper and lower sides respectively. The first housing (51) is injection molded on the outside of the first magnetic plate (3) and a protrusion (511) is injection molded in the groove (33). A positioning ring groove (512) is formed in the first housing (51) in a shape similar to the first magnetic plate (3). The protrusion (511) is disposed in the positioning ring groove (512).

11. The loudspeaker according to claim 7, characterized in that, The loudspeaker also includes a first conductive element (43) connected to the first voice coil (42). The first conductive element (43) is disposed on the first diaphragm (41) and extends outward to form a first contact element (431). The first contact element (431) is electrically connected to the electrical connector (53).

12. The loudspeaker according to claim 8, characterized in that, The loudspeaker also includes a second conductor (83) connected to the second voice coil (82). The second conductor (83) is disposed on the second diaphragm (81) and extends outward to form a second contact (831). The second contact (831) is electrically connected to the electrical connector (53).

13. The loudspeaker according to claim 11, characterized in that, The second magnetic plate (2) has clearance grooves (211) at both ends in the length direction, and the clearance grooves (211) correspond to the positions of the first conductive member (43).

14. A sound-generating device, characterized in that, The sound-generating device includes: The loudspeaker as described in any one of claims 1-13; The motherboard is electrically connected to the speaker.

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