Double-vibration loudspeaker and acoustic product

Abstract

The utility model relates to the technical field of acoustic products, and discloses a double-vibration loudspeaker and an acoustic product, and the double-vibration loudspeaker comprises two vibration systems and a magnetic circuit system arranged between the two vibration systems. The magnetic circuit system comprises a magnetic ring, a T iron, a bridging body, a first washer and a second washer, the first washer and one end of the T iron enclose to form a first magnetic circuit gap, the second washer and the other end of the T iron enclose to form a second magnetic circuit gap, the first magnetic circuit gap is located on the periphery of the bridging body, and the second magnetic circuit gap is located on the inner side of the bridging body; the T iron penetrates through the magnetic ring, the magnetic ring is connected with the two washers, the two washers are arranged around the two ends of the T iron respectively, and the bridging body is arranged on the periphery of the T iron in a sleeving mode and located between the magnetic ring and the T iron. The bridging body is connected with the T iron and a washer; each washer is connected with a vibration system; the magnetic ring is used for providing a magnetic field for vibration sounding of the two vibration systems. According to the utility model, the two vibration systems share one magnetic circuit system, so that the installation space of the loudspeaker is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of acoustic products, in particular to a double-vibration loudspeaker and an acoustic product. Background Art

[0002] Currently, the speakers on the market, whether they are ultra-thin speakers or conventional structure speakers, are all an independent magnetic circuit system corresponding to an independent vibration system. To meet different acoustic audio output requirements, it is necessary to install multiple speakers in the product at the same time. Multiple speakers require more installation space of the product, resulting in the inability to further miniaturize the product. Utility Model Content

[0003] The main purpose of the utility model is to provide a double-vibration loudspeaker and an acoustic product, aiming to reduce the installation space occupied by the loudspeaker.

[0004] To achieve the above object, the utility model provides a dual vibration speaker, which includes a first vibration system, a second vibration system, and a magnetic circuit system arranged between the first vibration system and the second vibration system;

[0005] The magnetic circuit system includes a magnetic ring, a T-iron, a bridge body, a first washer and a second washer;

[0006] The magnetic ring connects the first washer and the second washer, the T-iron is passed through the magnetic ring, the first washer surrounds one end of the T-iron and forms a first magnetic circuit gap with the T-iron; the second washer surrounds one end of the T-iron away from the first washer and forms a second magnetic circuit gap with the T-iron;

[0007] The bridge body connects one end of the T-iron close to the first washer and the second washer, and is located between the magnetic ring and the T-iron;

[0008] A side of the first washer facing away from the second washer is connected to the first vibration system, and a side of the second washer facing away from the first washer is connected to the second vibration system.

[0009] In an embodiment of the present invention, the bridge body includes a reinforcing protrusion arranged at one end of the bridge body connected to the second washer, and the reinforcing protrusion is located on a side of the bridge body facing the magnetic ring and connected to the second washer.

[0010] In an embodiment of the present invention, the bridge body further includes a bridge body and the reinforcing protrusion provided at one end of the bridge body connected to the second washer, and the bridge body is cylindrical.

[0011] In an embodiment of the present invention, the bridging body is provided with an air flow hole connecting the first magnetic circuit gap and the second magnetic circuit gap.

[0012] In one embodiment of the present invention, the T iron comprises a main body and a boss arranged around one end of the main body close to the first washer;

[0013] The first washer is spaced apart from the boss and together with the boss forms the first magnetic circuit gap; the second washer is spaced apart from one end of the main body away from the boss and together with one end of the main body away from the boss forms the second magnetic circuit gap; one end of the bridging body away from the reinforcing protrusion is connected to the boss.

[0014] In one embodiment of the utility model, a spacer protrusion is provided on the outer wall of the main body close to the boss;

[0015] The bridging body is connected to one end of the boss and abuts against the spacer protrusion to limit the position. The bridging body, the spacer protrusion and the main body together form a second airflow cavity connected to the second magnetic circuit gap; the bridging body, the reinforcing protrusion, the magnetic ring, the first washer and the second washer together form a first airflow cavity connected to the first magnetic circuit gap.

[0016] In an embodiment of the present invention, both the first washer and the second washer are provided with a central hole, and the diameter of the central hole of the first washer is larger than the diameter of the central hole of the second washer.

[0017] In one embodiment of the present invention, the T-iron is provided with a channel connecting the first vibration system and the second vibration system, and the channel is extended along the axial direction of the T-iron; and / or

[0018] A first step is formed on an inner wall of the channel close to the first washer; and a second step is formed on an inner wall of the channel close to the second washer.

[0019] In one embodiment of the present invention, the first vibration system includes a first voice coil, and the second vibration system includes a second voice coil;

[0020] One end of the first voice coil is movably located in the first magnetic circuit gap; one end of the second voice coil is movably located in the second magnetic circuit gap.

[0021] To achieve the above-mentioned purpose, the utility model proposes an acoustic product, which includes a protective shell and the dual-vibration speaker, the protective shell has two sound outlets arranged in opposite positions and the sound outlets are connected to the inner cavity of the protective shell, the dual-vibration speaker is arranged in the inner cavity and part of the structure of the vibration system is limited to the sound outlet.

[0022] In the technical solution of the utility model, the dual vibration speaker includes two vibration systems and a magnetic circuit system arranged between the two vibration systems. The two vibration systems are connected by the magnetic ring, T-iron, bridge body and two washers of the magnetic circuit system, so that the two vibration systems share one magnetic circuit system, thereby reducing the volume of the dual vibration speaker and thus reducing the installation space occupied by the dual vibration speaker in the acoustic product. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of the dual-vibration speaker provided by the utility model;

[0025] Figure 2 for Figure 1 Schematic diagram of structural explosion;

[0026] Figure 3 For along Figure 1 Sectional view along line AA;

[0027] Figure 4 for Figure 3 The enlarged schematic diagram of point B in the middle;

[0028] Figure 5 For along Figure 1 A schematic cross-sectional view of the three-dimensional structure of another embodiment along line AA;

[0029] Figure 6 for Figure 5 The enlarged schematic diagram at c in the middle;

[0030] Figure 7 A three-dimensional structural diagram of an embodiment of a T-iron provided by the utility model;

[0031] Figure 8 For along Figure 7 Sectional view along the midline BB;

[0032] Fig. 9 A schematic diagram of the three-dimensional structure of an embodiment of the bridge body provided by the utility model;

[0033] Fig.10 A schematic diagram of the three-dimensional structure of another embodiment of the bridge body provided by the utility model;

[0034] Fig.11 The figure is a three-dimensional structural diagram of an embodiment of the speaker provided by the utility model.

[0035] Description of Figure Numbers:

[0036]

[0037]

[0038] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0041] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0042] The utility model provides a dual-vibration speaker, which is applied to acoustic products 1000 such as audio equipment and voice interaction equipment. Figures 1 to 4As shown, the dual vibration speaker in this embodiment includes a first vibration system 101, a second vibration system 102 and a magnetic circuit system 103 arranged between the first vibration system 101 and the second vibration system 102; the magnetic circuit system 103 includes a magnetic ring 10, a T-iron 20, a bridge body 30, a first washer 41 and a second washer 42; the T-iron 20 is passed through the magnetic ring 10, the magnetic ring 10 connects the first washer 41 and the second washer 42, and the first washer 41 and the second washer 42 surround the T-iron 20 respectively. 0 is arranged at both ends, the bridge body 30 is sleeved on the outer periphery of the T iron 20 and is located between the magnetic ring 10 and the T iron 20; the bridge body 30 connects one end of the T iron 20 close to the first washer 41 and the second washer 42; the side of the first washer 41 facing away from the second washer 42 is connected to the first vibration system 101, and the side of the second washer 42 facing away from the first washer 41 is connected to the second vibration system 102; the magnetic ring 10 is used to provide a magnetic field for the vibration sound of the first vibration system 101 and the second vibration system 102.

[0043] In this embodiment, the first vibration system 101 and the second vibration system 102 are used to realize vibration sound generation, and the first vibration system 101 and the second vibration system 102 may include a basin frame, a voice coil, a spring wave, and other units used to realize the vibration of the speaker diaphragm in addition to the magnetic circuit system 103 that provides a magnetic field environment. When the first vibration system 101 and the second vibration system 102 are powered, they can realize frequency division sound generation through the drive of the same magnetic circuit system 103, so that the first vibration system 101 and the second vibration system 102 obtain sound outputs of different frequency bands.

[0044] The magnetic circuit system 103 is used to provide a magnetic field environment for the first vibration system 101 and the second vibration system 102, so that the voice coils in the first vibration system 101 and the second vibration system 102 can cut the magnetic field provided by the magnetic circuit system 103 when powered on, and obtain Ampere force drive and move, thereby driving the diaphragm connected to the voice coil to vibrate and produce sound.

[0045] The magnetic circuit system 103 is located between the first vibration system 101 and the second vibration system 102. The magnetic ring 10 of the magnetic circuit system 103 is located between the first washer 41 and the second washer 42, and can be fixedly connected to the first washer 41 and the second washer 42 by bonding. One end of the bridge body 30 is fixed to one end of the T-iron 20, and the other end of the bridge body 30 is fixed to the second washer 42. In this way, the first washer 41 is connected to the second washer 42 through the magnetic ring 10, and the second washer 42 is connected to the T-iron 20 through the bridge body 30, forming a magnetic circuit system 103 in which the first washer 41, the magnetic ring 10, the second washer 42, the bridge body 30 and the T-iron 20 are connected in sequence. The whole formed by the connection of the magnetic ring 10, the first washer 41 and the second washer 42 is arranged around the bridge body 30, and the bridge body 30 is arranged around the T-iron 20 to form a double-surrounding structure. The first washer 41 and the second washer 42 are both provided with a central hole, the aperture of the central hole of the first washer 41 is larger than the aperture of the central hole of the second washer 42, one end of the T-iron 20 is located in the central hole of the first washer 41 and is spaced from the inner wall of the central hole of the first washer 41; thus, a first magnetic circuit gap 20A is formed between the T-iron 20 and the inner wall of the central hole of the first washer 41, through which the voice coil of the first vibration system 101 can enter and exit. The other end of the T-iron 20 is located in the central hole of the second washer 42 and is spaced from the inner wall of the central hole of the second washer 42; thus, a second magnetic circuit gap 20B is formed between the T-iron 20 and the inner wall of the central hole of the second washer 42, through which the voice coil of the second vibration system 102 can enter and exit. In this way, the single magnetic circuit system 103 in this embodiment, which includes the magnetic ring 10, T-iron 20, bridge body 30, first washer 41 and second washer 42, can simultaneously provide a stable magnetic field environment for driving the voice coils of the first vibration system 101 and the second vibration system 102. The dual vibration systems share one magnetic circuit system 103, which can compress the volume of the dual vibration speaker and reduce the space overhead when the dual vibration speaker is used in audio and voice interaction products.

[0046] Optionally, the number of magnetic rings in this embodiment may be two or more. When the number of magnetic rings 10 is two, specifically the first magnetic ring 11 and the second magnetic ring 12, the first magnetic ring 11 and the second magnetic ring 12 may be coaxially connected by bonding, and the size specifications of the two magnetic rings may be the same or different. The first magnetic ring 11 and the second magnetic ring 12 are connected to the first washer 41 and the second washer 42 on the opposite sides thereof, respectively. The first magnetic ring 11 and the second magnetic ring 12 are both arranged on the outer periphery of the bridge body 30, and the whole formed by the connection of the first magnetic ring 11 and the second magnetic ring 12 may be arranged with the same width as the bridge body 30, so that the magnetic fields provided by the first magnetic ring 11 and the second magnetic ring 12 simultaneously cover the first magnetic circuit gap 20A and the second magnetic circuit gap 20B. Among them, when the size specifications of the first magnetic ring 11 and the second magnetic ring 12 are the same, combined with Figure 3 and Figure 4As shown, the first magnetic ring 11 can be mainly used to provide a magnetic field to the first vibration system 101, and the second magnetic ring 12 can be mainly used to provide a magnetic field to the second vibration system 102. The design of the double magnetic rings can provide a magnetic field with a higher magnetic field strength than the single magnetic ring design, thereby improving the output power of the dual vibration speaker. When there are multiple magnetic rings 10, the multiple magnetic rings can be coaxially connected in sequence by bonding. The two magnetic rings located on the far left and the far right are respectively connected to the first washer 41 and the second washer 42. Similarly, the design of multiple magnetic rings can further improve the magnetic field strength of the magnetic field that the magnetic system can provide, which is more conducive to improving the output power of the dual vibration speaker.

[0047] In one embodiment of the present invention, Figures 2 to 6 As shown, the first vibration system 101 includes a first basin frame 51, a first voice coil 71, a first damper 61 and a first drum paper 81, and the second vibration system 102 includes a second basin frame 52, a second voice coil 72, a second damper 62 and a second drum paper 82; one end of the first basin frame 51 is connected to the first washer 41, the first drum paper 81 is arranged at the end of the first basin frame 51 away from the first washer 41, one end of the first voice coil 71 is connected to the first drum paper 81, and the other end of the first voice coil 71 is movably located in the first magnetic circuit gap 20A; one end of the second basin frame 52 is connected to the second washer 42, the second drum paper 82 is arranged at the end of the second basin frame 52 away from the second washer 42, one end of the second voice coil 72 is connected to the second drum paper 82, and the other end of the second voice coil 72 is movably located in the second magnetic circuit gap 20B.

[0048] In this embodiment, the aperture of the middle hole of the first washer 41 is larger than the aperture of the middle hole of the second washer 42, and the bridge body 30 is sleeved on the outer periphery of the T iron 20, the first magnetic circuit gap 20A is located on the outer periphery of the bridge body 30, and the second magnetic circuit gap 20B is located on the inner side of the bridge body 30; the first vibration system 101 includes a first basin frame 51, a first voice coil 71 and a first drum paper 81, and the second vibration system 102 includes a second basin frame 52, a second voice coil 72 and a second drum paper 82, and the first basin frame 51 is connected to the first washer 41 by screws. The first damper 61 is fixed in the first basin frame 51 by screws, and the first voice coil 71 is movably arranged in the first basin frame 51. One end of the first voice coil 71 wound with a conductive coil is located in the first magnetic circuit gap 20A, cutting the magnetic field provided by the magnetic circuit system 103, and is driven and moved by the Ampere force. The other end of the first voice coil 71 is connected to the first damper 61 and the first drum paper 81. The first drum paper 81 is covered by the first dust cap 91. The first voice coil 71 drives the first drum paper 81 to move back and forth, thereby causing air vibration and making sound. The second basin frame 52 is connected to the second washer 42 by screws, the second spring 62 is fixed in the second basin frame 52 by screws, the second voice coil 72 is movably arranged in the second basin frame 52, one end of the second voice coil 72 wound with a conductive coil is located in the second magnetic circuit gap 20B, cuts the magnetic field provided by the magnetic circuit system 103, and is driven and moved by the Ampere force, the other end of the second voice coil 72 is connected to the second spring 62 and the second drum paper 82, the second drum paper 82 is covered by the second dust cap 92, and the second voice coil 72 drives the second drum paper 82 to move back and forth, thereby causing air vibration and producing sound. The inner diameter of the first magnetic circuit gap 20A is larger than the inner diameter of the second magnetic circuit gap 20B, the diameter of the first voice coil 71 is also larger than the second voice coil 72, and the middle hole of the first basin frame 51 through which the first voice coil 71 can pass is also larger than the middle hole of the second basin frame 52 through which the second voice coil 72 can pass.

[0049] In one embodiment of the present invention, Figure 3 , Figure 4 as well as Fig. 9 As shown, the bridge body 30 includes a reinforcing protrusion 301 disposed at one end of the bridge body 30 connected to the second washer 42 . The reinforcing protrusion 301 is located on a side of the bridge body 30 facing the magnetic ring 10 and connected to the second washer 42 .

[0050] In this embodiment, the bridge body 30 as a whole can be a sleeve-shaped structure, and the shape of the bridge body 30 and the T-iron 20 are adapted, so that when the bridge body 30 is sleeved on the outer periphery of the T-iron 20, the compactness of the fit between the two can be improved, which is conducive to compressing the volume of the dual vibration speaker. In this embodiment, a reinforcement protrusion 301 is provided at one end of the bridge body 30 connected to the second washer 42, and the reinforcement protrusion 301 increases the connection area between the bridge body 30 and the second washer 42, which is conducive to improving the connection reliability between the bridge body 30 and the second washer 42. The reinforcing protrusion 301 and the bridge body 30 can be an integrated structure formed by a process such as die casting. The reinforcing protrusion 301 can be uniformly protruded toward the outside of the bridge body 30 along the radial direction of the bridge body 30. At this time, the spacing between the reinforcing protrusion 301 and the inner wall of the magnetic ring 10 facing the bridge body 30 is equal, so that when the dual vibration speaker is assembled, the bridge body 30 is sleeved on the outer periphery of the T iron 20, and then the magnetic ring 10 is sleeved on the outer periphery of the bridge body 30. The reinforcing protrusion 301 of the bridge body 30 can be used to coaxially limit the position of the magnetic ring 10, thereby improving the coaxiality of the bridge body 30 and the magnetic ring 10 of the outer ring of the bridge body 30 during assembly.

[0051] In one embodiment of the present invention, Figure 3 to Figure 4 As shown, the T-iron 20 includes a main body 202 and a boss 201 arranged around one end of the main body 202 near the first washer 41; the first washer 41 is spaced apart from the boss 201 and is surrounded by the boss 201 to form a first magnetic circuit gap 20A; the second washer 40 is spaced apart from one end of the main body 202 away from the boss 201 and is surrounded by one end of the main body 202 away from the boss 201 to form a second magnetic circuit gap 20B; the end of the bridging body 30 away from the reinforcing protrusion 301 is connected to the boss 201. The T-iron 20 is arranged between the first washer 41 and the second washer 42. The size of the central hole of the first washer 41 is larger than the outer diameter of the protrusion 202 of the T-iron 20, and the space between the outer surface of the protrusion 202 and the inner wall of the central hole of the first washer 41 is an annular first magnetic circuit gap 20A; the size of the central hole of the second washer 42 is larger than the outer diameter of the main body 202 of the T-iron 20, and the space between the outer surface of the main body 202 and the inner wall of the central hole of the second washer 42 is an annular second magnetic circuit gap 20B, and the inner diameter of the first magnetic circuit gap 20A is larger than the inner diameter of the second magnetic circuit gap 20B. Because the first washer 41 and the second washer 42 are coaxially arranged, and the two washers share one T-iron 20, the first magnetic circuit gap 20A and the second magnetic circuit gap 20B are also coaxially arranged.

[0052] In this embodiment, the boss 201 and the main body 202 of the T iron 20 can be an integrally formed structure, the main body 202 can be a columnar structure, and the boss 201 can be uniformly raised toward the magnetic ring 10 along the radial direction of the main body 202, and form a ring structure. The end of the bridge body 30 away from the reinforcing boss 301 is fixed to the side of the boss 201 facing the second washer 42 to make way for the first voice coil 71 in the first vibration system 101, so as to avoid the first voice coil 71 of the first vibration system 101 from interfering with the bridge body 30 when reciprocating in the first magnetic circuit gap 20A, thereby hindering the movement of the first voice coil 71 of the first vibration system 101. The boss 201 is located in the middle hole of the first washer 41, and the end of the main body 202 away from the boss 201 is located in the middle hole of the second washer 42. In this embodiment, the inner diameter of the middle hole of the first washer 41 is greater than the inner diameter of the middle hole of the second washer 42, and the outer diameter of the boss 201 is greater than the outer diameter of the main body 202, so that the first washer 41 and the boss 201 enclose the first magnetic circuit gap 20A and the second washer 42 and the main body 202 enclose the second magnetic circuit gap 20B, so as to avoid the first voice coil 71 of the first vibration system 101 located in the first magnetic circuit gap 20A and the second voice coil 72 of the second vibration system 102 located in the second magnetic circuit gap 20B from generating position interference during movement, so as to ensure that the first vibration system 101 and the second vibration system 102 can vibrate and sound independently of each other. And when the number of magnetic rings is two, the first voice coil 71 of the first vibration system 101 can move and cut the magnetic field provided by the above-mentioned first magnetic ring 11, and the second voice coil 72 of the second vibration system 102 can move and cut the magnetic field provided by the above-mentioned second magnetic ring 12, so as to meet various acoustic sounding requirements.

[0053] In one embodiment of the present invention, Figures 5 to 8 As shown, a spacer protrusion 203 is provided on the outer wall of the main body 202 near the boss 201; one end of the bridging body 30 connected to the boss 201 abuts against the spacer protrusion 203 to limit the position, and the bridging body 30, the spacer protrusion 203 and the main body 202 enclose a second airflow cavity 30B connected to the second magnetic circuit gap 20B; the bridging body 30, the reinforcing protrusion 301, the magnetic ring 10, the first washer 41 and the second washer 42 enclose a first airflow cavity 30A connected to the first magnetic circuit gap 20A.

[0054] In this embodiment, the T-iron 20 is provided with a spacer protrusion 203, which is located on the side of the boss 201 facing the second washer 42 and can be an integrally formed structure with the boss 201; the spacer protrusion 203 can be uniformly protruded along the radial direction of the main body 202, and the spacer protrusion 203 can be adapted to the shape of the bridge body 30. The spacing between the main body 202 and the bridge body 30 is defined by the abutment and limiting of the spacer protrusion 203. In addition, the bridge body 30 is supported and limited by the spacer protrusion 203 on the one hand, and the bridge body 30 can also be bonded to the spacer protrusion 203 on the other hand. The provision of the spacer protrusion 203 increases the connection area between the bridge body 30 and the T-iron 20, and improves the connection reliability between the bridge body 30 and the T-iron 20. The bridge body 30 forms a spacing space between the main body 202 of the T iron 20 through the contact limit of the spacer protrusion 203, that is, the second airflow cavity 30B. The second airflow cavity 30B is connected with the second magnetic circuit gap 20B and forms a channel space for the second voice coil 72 of the second vibration system 102 to move. In this way, a longer movement stroke can be provided for the second voice coil 721 of the second vibration system 102, which is conducive to improving the maximum output power of the dual vibration speaker. At the same time, the first airflow cavity 30A is connected with the first magnetic circuit gap 20A, and a channel space is formed for the first voice coil 71 of the first vibration system 101 to move. In this way, a longer movement stroke can be provided for the first voice coil 71 of the first vibration system 101, which is conducive to improving the maximum output power of the dual vibration speaker.

[0055] In one embodiment of the present invention, Figure 2 and Fig. 9 As shown, the bridge body 30 includes a bridge body 302 and a reinforcing protrusion 301 provided at one end of the bridge body 302 connected to the second washer 42. The bridge body 302 is a cylindrical structure that blocks the communication between the first airflow cavity 30A and the second airflow cavity 30B.

[0056] In this embodiment, the bridge body 302 blocks the connection between the first airflow cavity 30A and the second airflow cavity 30B, so as to prevent the first voice coil 71 located in the first magnetic circuit gap 20A from being disturbed by the airflow in the second magnetic circuit gap 20B when the dual vibration speaker is working, and to prevent the second voice coil 72 located in the second magnetic circuit gap 20B from being disturbed by the airflow in the first magnetic circuit gap 20A when the dual vibration speaker is working. In this way, the bridge body 302 blocks the connection between the first airflow cavity 30A and the second airflow cavity 30B, which can effectively prevent the vibration interference between the first vibration system 101 and the second vibration system 102 when the dual vibration speaker vibrates and produces sound, thereby ensuring the accuracy and stability of the sound output by the dual vibration speaker. In this embodiment, the material of the bridge body 30 can be aluminum. The bridge body 30 made of aluminum is easy to process and shape, is light in texture, and has non-magnetic conductive properties. The bridge body 30 made of aluminum not only bridges the first vibration system 101 and the second vibration system 102, but also serves as a short-circuit ring of the magnetic circuit system 103, which can effectively reduce the eddy current and inductive reactance generated by the copper coil on the voice coil of the first vibration system 101 and the second vibration system 102 cutting the magnetic flux lines of the magnetic field provided by the magnetic circuit system 103, thereby reducing the sound distortion rate of the first vibration system 101 and the second vibration system 102.

[0057] In one embodiment of the present invention, Figure 6 and Fig.10 As shown, an air flow hole 30a connecting the first magnetic circuit gap 20A and the second magnetic circuit gap 20B may also be opened in the bridge body 302.

[0058] In this embodiment, the bridge body 30 is sleeved on the outer periphery of the T iron 20, and the bridge body 302 is provided with airflow holes 30a connecting the first airflow cavity 30A and the second airflow cavity 30B. The airflow holes 30a are evenly arranged on the peripheral side of the bridge body 30, and the airflow holes 30a connect the first airflow cavity 30A and the second airflow cavity 30B, so that the first magnetic circuit gap 20A is connected to the second magnetic circuit gap 20B. The interconnected first magnetic circuit gap 20A and the second magnetic circuit gap 20B provide a larger rear sound cavity space than the single magnetic gap design, which can improve the low-frequency vibration effect of the sound unit. It can be understood that the number and size of the airflow holes 30a can obtain excellent design results through limited experiments, and are not limited here.

[0059] In one embodiment of the present invention, Figure 8 As shown, the T-iron 20 is provided with a channel 20C connecting the first vibration system 101 and the second vibration system 102 .

[0060] In this embodiment, the T-iron 20 includes a main body 202 and a protrusion 201 surrounding one end of the main body. The main body 202 is provided with a channel 20C connecting the first vibration system 101 and the second vibration system 102, so that the T-iron 20 becomes a hollow structure. The channel 20C can be used as the rear sound cavity of the first vibration system 101, and can also be used as the rear sound cavity of the second vibration system 102; the setting of the channel 20C provides a larger sound cavity space for the first vibration system 101 and the second vibration system 102, so that the air in the channel 20C can resonate with the diaphragms of the first vibration system 101 and the second vibration system 102, thereby enhancing the bass effect of the dual vibration speaker. Furthermore, the cross-sectional shape of the channel 20C can be circular. The circular channel is easy to design and process, and the circular channel 20C is more conducive to uniform diffusion, distribution and circulation of the airflow, which helps to reduce the noise caused by the uneven internal air flow when the dual-vibration speaker is working, which helps to improve the sound quality of the dual-vibration speaker. In addition, the channel 20C of the T-iron 20 provides a larger heat dissipation surface area for the magnetic circuit system 103, which helps to improve the heat dissipation efficiency of the dual-vibration speaker.

[0061] In one embodiment of the present invention, Figure 8 As shown, the channel 20C is extended along the axial direction of the T iron 20;

[0062] A first step 204 is formed on an inner wall of the channel 20C close to the first washer 41 ; and / or a second step 205 is formed on an inner wall of the channel 20C close to the second washer 42 .

[0063] In this embodiment, the channel 20C of the T iron 20 may include a first wide mouth 20a, a connecting section 20b and a second wide mouth section 20c which are connected in sequence, the first wide mouth 20a is connected to the first vibration system 101, the second wide mouth section 20c is connected to the second vibration system 102, a first step 204 is formed at the connection between the first wide mouth section 20a and the connecting section 20b, a second step 205 is formed at the connection between the connecting section 20b and the second wide mouth section 20c, and the caliber of the first wide mouth section 20a is different from the caliber of the second wide mouth section 20c. From one end of the first wide-mouth section 20a connected to the connecting section 20b to the end of the first wide-mouth section 20a away from the connecting section 20b, the cross-sectional area of ​​the first wide-mouth section 20a gradually increases; from one end of the second wide-mouth section 20c connected to the connecting section 20b to the end of the second wide-mouth section 20c away from the connecting section 20b, the cross-sectional area of ​​the second wide-mouth section 20c gradually increases. Through the structural design of the first wide-mouth section 20a, the connecting section 20b and the second wide-mouth section 20c mentioned above, this embodiment can make the T-iron 20 obtain different magnetic conductive widths at both ends of the channel 20C, so that the first vibration system 101 and the second vibration system 102 can accept magnetic fields of different magnetic fluxes, thereby meeting the different acoustic performance requirements of the dual-vibration speaker and enriching the functionality of the acoustic product 1000 using the dual-vibration speaker.

[0064] The utility model also proposes an acoustic product 1000, which can be a speaker or a voice assistant device. Any acoustic product 1000 that needs to vibrate and produce sound can use the dual vibration speaker proposed in the technical solution, without limitation. Fig.11 As shown, the acoustic product 1000 has a protective shell 1001 and a dual-vibration speaker, the protective shell 1001 has two sound outlets arranged in opposite positions and the sound outlets are connected to the inner cavity of the protective shell 1001, the dual-vibration speaker is arranged in the inner cavity and part of the structure of the vibration system is limited to the sound outlet. The specific structure of the dual-vibration speaker refers to the above-mentioned embodiment. Since the acoustic product 1000 adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0065] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A dual vibration speaker, characterized in that: The dual vibration speaker comprises a first vibration system (101), a second vibration system (102), and a magnetic circuit system (103) arranged between the first vibration system (101) and the second vibration system (102); The magnetic circuit system (103) comprises a magnetic ring (10), a T-iron (20), a bridge body (30), a first washer (41) and a second washer (42); The magnetic ring (10) is connected to the first washer (41) and the second washer (42); the T-iron (20) is passed through the magnetic ring (10); the first washer (41) surrounds one end of the T-iron (20) and is enclosed with the T-iron (20) to form a first magnetic circuit gap (20A); the second washer (42) surrounds one end of the T-iron (20) away from the first washer (41) and is enclosed with the T-iron (20) to form a second magnetic circuit gap (20B); The bridge body (30) connects one end of the T-iron (20) close to the first washer (41) and the second washer (42), and is located between the magnetic ring (10) and the T-iron (20); The side of the first washer (41) facing away from the second washer (42) is connected to the first vibration system (101), and the side of the second washer (42) facing away from the first washer (41) is connected to the second vibration system (102).

2. The dual vibration speaker according to claim 1, characterized in that: The bridging body (30) comprises a reinforcing protrusion (301) arranged at one end of the bridging body (30) connected to the second washer (42); the reinforcing protrusion (301) is located on a side of the bridging body (30) facing the magnetic ring (10) and is connected to the second washer (42).

3. The dual vibration speaker as claimed in claim 2, characterized in that: The bridge body (30) further comprises a bridge body (302) and a reinforcing protrusion (301) arranged at one end of the bridge body (302) connected to the second washer (42), and the bridge body (302) is cylindrical.

4. The dual vibration speaker as claimed in claim 3, characterized in that: The bridging body (302) is provided with an air flow hole (30a) connecting the first magnetic circuit gap (20A) and the second magnetic circuit gap (20B).

5. The dual vibration speaker according to claim 3 or 4, characterized in that: The T-iron (20) comprises a main body (202) and a boss (201) arranged around one end of the main body (202) close to the first washer (41); The first washer (41) is spaced apart from the boss (201) and is enclosed with the boss (201) to form the first magnetic circuit gap (20A); the second washer (42) is spaced apart from an end of the main body (202) away from the boss (201) and is enclosed with an end of the main body (202) away from the boss (201) to form the second magnetic circuit gap (20B); and an end of the bridging body (30) away from the reinforcing protrusion (301) is connected to the boss (201).

6. The dual vibration speaker as claimed in claim 5, characterized in that: The outer wall of the main body (202) close to the boss (201) is provided with a spacer protrusion (203); The bridging body (30) is connected to one end of the boss (201) and abuts against the spacer protrusion (203) to limit the position. The bridging body (30), the spacer protrusion (203) and the main body (202) together form a second airflow cavity (30B) connected to the second magnetic circuit gap (20B); the bridging body (30), the reinforcing protrusion (301), the magnetic ring (10), the first washer (41) and the second washer (42) together form a first airflow cavity (30A) connected to the first magnetic circuit gap (20A).

7. The dual vibration speaker as claimed in claim 1, characterized in that: The first washer (41) and the second washer (42) are both provided with a central hole, and the diameter of the central hole of the first washer (41) is larger than the diameter of the central hole of the second washer (42).

8. The dual vibration speaker as claimed in claim 1, characterized in that: The T-iron (20) is provided with a channel (20C) connecting the first vibration system (101) and the second vibration system (102), and the channel (20C) is extended along the axial direction of the T-iron (20); and / or A first step (204) is formed on the inner wall of the channel (20C) close to the first washer (41); a second step (205) is formed on the inner wall of the channel (20C) close to the second washer (42).

9. The dual vibration speaker according to any one of claims 1 to 8, characterized in that: The first vibration system (101) includes a first voice coil (71), and the second vibration system includes a second voice coil (72); One end of the first voice coil (71) is movably located in the first magnetic circuit gap (20A); and one end of the second voice coil (72) is movably located in the second magnetic circuit gap (20B).

10. An acoustic product (1000), characterized in that: The acoustic product (1000) comprises a protective shell (1001) and a dual-vibration loudspeaker as described in any one of claims 1 to 9, the protective shell (1001) having two sound outlets arranged in opposite positions and the sound outlets being connected to an inner cavity of the protective shell (1001), the dual-vibration loudspeaker being arranged in the inner cavity and a part of the structure of the vibration system being limited to the sound outlets.

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