Loudspeaker

Abstract

The loudspeaker comprises a supporting part, a magnetic circuit assembly and a positioning assembly, the magnetic circuit assembly is connected with the supporting part through the positioning assembly, and the magnetic circuit assembly vibrates relative to the supporting part; the positioning assembly comprises two vibration transmission pieces, the two vibration transmission pieces are distributed in the vibration direction of the magnetic circuit assembly at intervals, and two projections of the two vibration transmission pieces in the vibration direction have symmetry. According to the loudspeaker provided by the embodiment of the invention, the vibration transmission sheets are respectively arranged on the two sides of the magnetic circuit assembly along the vibration direction of the magnetic circuit assembly, and the vibration direction of the magnetic circuit assembly is restrained by the vibration transmission sheets on the two sides, so that on one hand, shaking of the magnetic circuit assembly during vibration can be reduced; the folding amplitude of the vibration transmission sheet in the long-axis direction or the short-axis direction of the vibration transmission sheet is reduced, so that the breakage and damage time of the vibration transmission sheet is greatly prolonged, and the service life of the vibration transmission sheet is ensured.

Description

Technical Field

[0001] The present invention relates to the field of acoustic output devices, and in particular to a loudspeaker. Background Art

[0002] As an important component of bone conduction speakers, the vibration transmitter can transmit the vibration generated by the bone conduction vibrator in the bone conduction speaker to the shell, and then transmit it to the human auditory nerve through the human skin, subcutaneous tissue and bones, so that people can hear the sound. Usually, the bone conduction vibrator of a bone conduction speaker is prone to vibrate away from the vibration direction when vibrating, and may collide with the shell or coil. At the same time, the vibration transmitter is more likely to break due to the vibration of the bone conduction vibrator that deviates from the vibration direction.

[0003] Therefore, it is necessary to propose a loudspeaker with improved structural reliability. Summary of the invention

[0004] One of the embodiments of the present specification provides a loudspeaker, which includes: a support portion, a magnetic circuit assembly and a positioning assembly, wherein the magnetic circuit assembly is connected to the support portion through the positioning assembly, and the magnetic circuit assembly vibrates relative to the support portion; the positioning assembly includes two vibration transmission plates, the two vibration transmission plates are spaced apart in the vibration direction of the magnetic circuit assembly, and the two projections of the two vibration transmission plates along the vibration direction are symmetrical. In the embodiment of the present specification, vibration transmission plates are respectively arranged on both sides of the magnetic circuit assembly along its vibration direction, and the vibration direction of the magnetic circuit assembly is constrained by the vibration transmission plates on both sides. On the one hand, the shaking of the magnetic circuit assembly during vibration can be reduced. On the other hand, by setting up the double vibration transmission plates, the amplitude of the vibration transmission plate folding around its own long axis direction or short axis direction is reduced, so that the time for the vibration transmission plate to be broken or damaged is greatly extended, thereby ensuring the service life of the vibration transmission plate.

[0005] In some embodiments, the two vibration transmission plates include a first vibration transmission plate, the first vibration transmission plate includes a central area, an edge area, and a connecting rod connecting the central area and the edge area, the connecting rod includes a first portion connecting the central area, a second portion connecting the edge area, and a third portion located between the first portion and the second portion, and the width of the first portion and the second portion is greater than the width of the third portion. By making the width of the first portion and the second portion greater than the width of the third portion, the stiffness coefficient of the first portion and the second portion of the connecting rod can be increased, thereby enhancing the structural strength between the connecting rod and the central area and the edge area.

[0006] In some embodiments, there are two connecting rods, and the two connecting rods are symmetrical about the center of the first vibration transmission plate. By making the second connecting rod symmetrical about the geometric center of the first vibration transmission plate, the vibration transmission plate can be subjected to balanced force in the working state, avoiding the vibration transmission plate from being overweight and turning over, which is beneficial to improving the fatigue resistance of the vibration transmission plate when it turns over.

[0007] In some embodiments, the thickness of the connecting rod is in the range of 0.1 mm to 0.15 mm. By adjusting the thickness of the connecting rod, the stiffness coefficient of the connecting rod can be increased so that the stiffness of the vibration transmission plate in each direction meets the limited range.

[0008] In some embodiments, the width of the third portion of the connecting rod is in the range of 0.2 mm to 0.66 mm. By adjusting the width of the connecting rod, the stiffness coefficient of the connecting rod can be increased so that the stiffness of the vibration transmission plate in each direction meets the limited range.

[0009] In some embodiments, the two vibration transmission plates also include a second vibration transmission plate, the first vibration transmission plate and the second vibration transmission plate have a long axis direction and a short axis direction, and the first vibration transmission plate and the second vibration transmission plate satisfy at least one of the following conditions: the equivalent stiffness of the first vibration transmission plate and the second vibration transmission plate along the long axis direction is in the range of 7500N / m-12500N / m, so as to ensure the fatigue resistance of the first vibration transmission plate and the second vibration transmission plate in the long axis direction, and prevent the two vibration transmission plates from cracking or breaking along the long axis direction; the equivalent stiffness of the first vibration transmission plate and the second vibration transmission plate along the short axis direction is in the range of 15000N / m-25000N / m, so as to ensure the fatigue resistance of the first vibration transmission plate and the second vibration transmission plate in the short axis direction, and prevent the first vibration transmission plate and the second vibration transmission plate from cracking or breaking along the short axis direction; the first vibration transmission plate and the second vibration transmission plate along the vibration direction The equivalent stiffness is in the range of 1200N / m-2000N / m to ensure the fatigue resistance of the first vibration transmission plate and the second vibration transmission plate in the vertical axis direction, and prevent the first vibration transmission plate or the second vibration transmission plate from cracking or breaking in the vertical axis direction; the equivalent stiffness of the first vibration transmission plate and the second vibration transmission plate when flipping around the major axis is in the range of 0.05-0.15N*m / rad to ensure the fatigue resistance of the first vibration transmission plate and the second vibration transmission plate when flipping around the major axis, and prevent the first vibration transmission plate or the second vibration transmission plate from cracking or breaking when flipping around the major axis; the equivalent flipping stiffness of the first vibration transmission plate and the second vibration transmission plate when flipping around the minor axis is in the range of 0.1-0.2N*m / rad to ensure the fatigue resistance of the first vibration transmission plate when flipping around the minor axis, and prevent the first vibration transmission plate from cracking or breaking when flipping around the minor axis.

[0010] In some embodiments, the two projections of the two vibration transmission plates are symmetrical about the short axis direction, symmetrical about the long axis direction, or centrally symmetrical, which can correspondingly improve the anti-fatigue performance of the speaker in all directions.

[0011] In some embodiments, the magnetic circuit assembly includes a first magnet, a magnetic conductive plate, a second magnet and a magnetic conductive cover arranged in sequence along the vibration direction, and the vibration transmission plate includes a first vibration transmission plate and a second vibration transmission plate. The first vibration transmission plate is located on the side of the first magnet away from the magnetic conductive plate, and the second vibration transmission plate is located on the side of the magnetic conductive cover away from the second magnet.

[0012] In some embodiments, along the vibration direction, the distance between the two opposite sides of the first magnet and the first vibration-transmitting plate is not less than 0.9 mm, and the distance between the two opposite sides of the magnetic shield and the second vibration-transmitting plate is not less than 0.9 mm. This can avoid collision between the magnetic circuit assembly and the vibration-transmitting plate in the vibration direction, thereby avoiding affecting the acoustic performance of the speaker and the service life of the vibration-transmitting plate.

[0013] In some embodiments, the magnetic circuit assembly drives the positioning assembly to vibrate, and the resonance peak frequency generated by the positioning assembly does not exceed 300 Hz, which can improve the frequency response of the speaker at low frequencies, and at the same time make the frequency response curve of the speaker relatively flat within a wider frequency band, thereby improving the signal-to-noise ratio of the speaker in a specific frequency band.

[0014] In some embodiments, the vibration transmitter also includes a second vibration transmitter, the supporting portion includes a shell and a first bracket and a second bracket respectively used to connect the first vibration transmitter and the second vibration transmitter to the shell; the edge area of ​​the first vibration transmitter is fixed on the first bracket, and the coil of the speaker is fixed on the first bracket; the edge area of ​​the second vibration transmitter is fixed on the second bracket.

[0015] In some embodiments, the Young's modulus of the second vibration transmission plate is greater than that of the first vibration transmission plate, so that the hardness of the second vibration transmission plate near the bottom of the magnetic circuit assembly can be greater than that of the first vibration transmission plate far from the bottom of the magnetic circuit assembly, so that the second vibration transmission plate can adapt to the larger shaking of the magnetic circuit assembly near its bottom area, which is beneficial to reduce the shaking of the magnetic circuit assembly when it vibrates in the vibration direction, and prevent the magnetic circuit assembly from tilting.

[0016] In some embodiments, the edge area of ​​the first vibration transmission piece is annular, and the two vibration transmission pieces satisfy at least one of the following conditions:

[0017] The equivalent stiffness of the two vibration transmission plates in the extension direction of the connecting rod is within the range of 10000N / m-20000N / m, so as to ensure the fatigue resistance of the first vibration transmission plate and the second vibration transmission plate along the extension direction of the connecting rod and prevent the first vibration transmission plate or the second vibration transmission plate from cracking or breaking in the extension direction of the connecting rod;

[0018] The equivalent stiffness of the two vibration transmission plates in the vibration direction is in the range of 1200N / m-2000N / m to ensure the fatigue resistance of the first vibration transmission plate and the second vibration transmission plate in the vertical axis direction and prevent the first vibration transmission plate or the second vibration transmission plate from cracking or breaking in the vertical axis direction.

[0019] The equivalent flipping of the two vibration transmission plates around the extension direction of the connecting rod is within the range of 0.1N*m / rad-0.15N*m / rad, so as to ensure the anti-fatigue performance of the first vibration transmission plate and the second vibration transmission plate when flipping around the extension direction of the connecting rod, and prevent the first vibration transmission plate or the second vibration transmission plate from cracking or breaking when flipping around the extension direction of the connecting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] This specification will be further described in the form of exemplary embodiments, which will be described in detail by the accompanying drawings. These embodiments are not restrictive, and in these embodiments, the same number represents the same structure, wherein:

[0021] Figure 1 is a schematic diagram of a frame of a speaker according to some embodiments of this specification;

[0022] Figure 2 is a schematic diagram of the structure of a speaker according to some embodiments of this specification;

[0023] Figure 3 Schematic diagrams of four distributions of vibration transmission sheets according to some embodiments of this specification;

[0024] Figure 4 is a schematic structural diagram of a first vibration transmission piece according to some embodiments of this specification;

[0025] Figure 5A is a schematic structural diagram of a first vibration transmission piece according to some embodiments of this specification;

[0026] Figure 5B is a schematic structural diagram of a first vibration transmission piece according to some embodiments of this specification;

[0027] Fig. 6A is a schematic structural diagram of a first vibration transmission piece according to some embodiments of this specification;

[0028] Figure 6B is a schematic structural diagram of a first vibration transmission piece according to some embodiments of this specification;

[0029] Figure 6C is a schematic structural diagram of a first vibration transmission piece according to some embodiments of this specification;

[0030] Fig.6D is a schematic structural diagram of a first vibration transmission piece according to some embodiments of this specification;

[0031] Figure 7 They are respectively adopted Figure 6B-6D The frequency response curve of the loudspeaker of the vibration transmission piece shown;

[0032] Figure 8 Schematic diagrams of three distributions of vibration transmission sheets according to some embodiments of this specification;

[0033] Fig. 9 Schematic diagrams of three distributions of vibration transmission sheets according to some embodiments of this specification;

[0034] Fig. 10A It is a schematic diagram of the structure of a vibration transmission piece according to some embodiments of this specification;

[0035] Fig. 10B It is a schematic diagram of the structure of another vibration transmission piece shown in some embodiments of this specification. Specific embodiments

[0036] In order to more clearly illustrate the technical solutions of the embodiments of this specification, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some examples or embodiments of this specification. For ordinary technicians in this field, this specification can also be applied to other similar scenarios based on these drawings without creative work. It should be understood that these exemplary embodiments are given only to enable technicians in related fields to better understand and implement this specification, and do not limit the scope of this specification in any way. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0037] As shown in this specification and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular and may also include the plural, unless the context clearly indicates an exception. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment".

[0038] In the description of this specification, it should be understood that the terms "front", "rear", "ear hook", "rear hook", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this specification and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this specification.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying 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 the description of this specification, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In this specification, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this specification can be understood according to specific circumstances.

[0041] The embodiment of the present specification provides a speaker, including a support part, a magnetic circuit component and a positioning component, wherein the magnetic circuit component is connected to the support part through the positioning component, and the positioning component includes a first vibration transmitting plate and a second vibration transmitting plate, and the first vibration transmitting plate and the second vibration transmitting plate are spaced apart in the vibration direction of the magnetic circuit component, and the first vibration transmitting plate and the second vibration transmitting plate have symmetry between two projections along the vibration direction. When the magnetic circuit component vibrates relative to the support part, the first vibration transmitting plate and the second vibration transmitting plate transmit the vibration to the support part, and then transmit it to the user's auditory nerve through the user's skin, subcutaneous tissue and bones, so that the user can hear the sound. If a single vibration transmitting plate structure is adopted, the magnetic circuit component is prone to vibration that deviates from the vibration direction when vibrating, and may collide with other parts of the speaker (such as a housing or a coil, etc.); at the same time, when the magnetic circuit component vibrates that deviates from the vibration direction, the vibration transmitting plate will flip under the influence of its vibration. When the vibration transmitting plate is in a shape with a long axis direction and a short axis direction, for example, when the vibration transmitting plate is a runway-shaped structure, the vibration transmitting plate will flip around the long axis direction and the short axis direction, causing the vibration transmitting plate to be easily broken. The loudspeaker provided in the embodiments of the present specification has vibration-transmitting plates respectively arranged on both sides of the magnetic circuit assembly along its vibration direction. The vibration direction of the magnetic circuit assembly is constrained by the vibration-transmitting plates on both sides. On the one hand, the shaking of the magnetic circuit assembly during vibration can be reduced. On the other hand, the arrangement of the double vibration-transmitting plates can reduce the folding amplitude of the vibration-transmitting plates around their own long axis or short axis direction, thereby greatly extending the time before the vibration-transmitting plates are broken or damaged, thereby ensuring the service life of the vibration-transmitting plates.

[0042] Figure 1 It is a schematic diagram of a frame of a speaker according to some embodiments of the present specification.

[0043] like Figure 1 As shown, the speaker 100 includes a magnetic circuit component 110, a positioning component 120 and a support portion 130, wherein the magnetic circuit component 110 is connected to the support portion 130 via the positioning component 120, and the support portion 130 is used to support other components in the speaker 100, such as the magnetic circuit component 110, the positioning component 120, etc.

[0044] In some embodiments, the magnetic circuit assembly 110 is connected to the support portion 130 through the positioning assembly 120, and the positioning assembly 120 may include at least one vibration sensor. The magnetic circuit assembly 110 may generate mechanical vibrations along the vibration direction in response to an electrical signal, and the mechanical vibrations generated by the magnetic circuit assembly 110 are transmitted to the positioning assembly, and the mechanical vibrations are transmitted to the support portion 130 (e.g., the housing) via the positioning assembly 120. When a user wears the speaker 100, a part of the structure of the support portion 130 (e.g., one side of the housing or the vibration panel) contacts the user's skin, and the support portion 130 transmits the mechanical vibrations to the user's auditory nerve through the user's skin, bones, and / or tissues, thereby enabling the user to hear the sound.

[0045] Figure 2 1 is a schematic diagram of the structure of a speaker provided according to some embodiments of this specification. Figure 1 and Figure 2 In some embodiments, the support portion 130 may include a shell 131, and a housing cavity may be formed in the shell 131 for accommodating the magnetic circuit assembly 110 and the positioning assembly 120. In some embodiments, the positioning assembly 120 may be connected to the shell 131 and the magnetic circuit assembly 110 at the same time to suspend the magnetic circuit assembly 110 in the housing cavity of the shell 131. When the user wears the speaker 100, a side wall of the shell 131 (for example, a vibration panel of the shell facing the face of the user) contacts the human body, and the mechanical vibration generated by the magnetic circuit assembly 110 is transmitted to the shell 131 and transmitted to the user via the side wall of the shell 131 in contact with the human body, thereby realizing the conduction of bone-conducted sound waves. In some embodiments, the support portion 130 may include a shell 131 and a vibration panel ( Figure 2 The housing 131 is not shown in the figure, the magnetic circuit assembly 110 and the positioning assembly 120 are arranged in the accommodation cavity of the housing 131, and the vibration panel is connected to the positioning assembly 120. When the user wears the speaker 100, the vibration panel contacts the human body, and the mechanical vibration generated by the magnetic circuit assembly 110 is transmitted to the vibration panel, and then transmitted to the user via the vibration panel in contact with the human body, so as to realize the conduction of bone-conducted sound waves. It should be noted that the housing 131 can be a rectangular parallelepiped, a cylinder, a terraced decoupling stock, or any irregular shape and a combination thereof, and is not limited to the shape shown in the figure.

[0046] In some embodiments, the positioning assembly 120 may include two vibration transducers ( Figure 2 As shown in the figure, the two vibration transmission plates 121 and the second vibration transmission plate 122 are spaced apart in the vibration direction of the magnetic circuit component 110, and the two vibration transmission plates are located on opposite sides of the magnetic circuit component 110 along the vibration direction, and the two vibration transmission plates are symmetrically distributed between the two projections along the vibration direction, that is, they have symmetry, and both sides of the magnetic circuit component 110 along the vibration direction are connected to the support part 130 through the vibration transmission plates.

[0047] Since the two vibration transmitting plates are separated and arranged along the vibration direction and are not in the same plane, for the convenience of description, the description method of symmetrical distribution of the two projections of the two vibration transmitting plates along the vibration direction is adopted, which actually corresponds to the distribution method of the two vibration transmitting plates. In some embodiments, the vibration transmitting plates can be runway-shaped, rectangular, elliptical, circular, rhombus-shaped or polygonal, or any irregular shape and combination thereof. In order to more clearly illustrate the symmetrical distribution of the two projections of the two vibration transmitting plates along the vibration direction, the runway-shaped vibration transmitting plate is used as an example for explanation. When the vibration transmitting plate is a runway-shaped structure, it has a long axis direction and a short axis direction. In some embodiments, the symmetrical distribution of the two projections of the two vibration transmitting plates along the vibration direction can include that the two projections are symmetrical along the long axis, and the symmetry of the two projections about the long axis can be understood as that after one of the two vibration transmitting plates is flipped 180° along the long axis, the two projections of the two vibration transmitting plates in the vibration direction overlap. In some embodiments, the two projections of the two vibration transmitting plates along the vibration direction are symmetrically distributed in a manner that the two projections are symmetrical about the short axis, where the symmetry of the two projections along the short axis can be understood as one of the two vibration transmitting plates flipped 180° along the short axis, and the two projections of the two vibration transmitting plates in the vibration direction overlap. In some embodiments, the two projections of the two vibration transmitting plates along the vibration direction are symmetrically distributed in a manner that the two projections are centrally symmetrical, where the two projections are centrally symmetrical can be understood as one of the two vibration transmitting plates flipped 180° along the long axis and the short axis respectively, and the two projections of the two vibration transmitting plates in the vibration direction overlap. Taking the vibration transmitting plate as a circle as an example, the vibration transmitting plate has a first radial direction and a second radial direction perpendicular to the first radial direction, and the two projections of the two vibration transmitting plates along the vibration direction can be symmetrically distributed along the first radial direction, symmetrically distributed along the second radial direction, or centrally symmetrically distributed. For ease of description, the following explanation is given by taking the vibration transmitting plate as a runway as an example.

[0048] Figure 3 Schematic diagrams of four distributions of vibration transmission sheets according to some embodiments of this specification. Figure 3 As shown, the shape of the vibration transmission piece is a racetrack shape, and the vibration transmission piece has a long axis direction (i.e. Figure 3 X direction shown) and the short axis direction (i.e. Figure 3 Y direction shown). Figure 3 The two vibration transmission plates shown in area a in the figure have two overlapping projections along the vibration direction. Figure 3 The two vibration transmission plates shown in area b have two projections along the vibration direction that are symmetrical along their long axis. Figure 3 The two vibration transmission plates shown in the c area are symmetrical along the two projection centers of the vibration direction, and the center here refers to the geometric center of the peripheral contour shape of the vibration transmission plate. Figure 3 The two vibration transmission plates shown in area d have two projections along the vibration direction symmetrical along their short axis.

[0049] For comparison Figure 3 The service life of the vibration plate under the four dual vibration plate distribution modes shown in the figure is different from that of the loudspeaker with a single vibration plate and the loudspeaker with a single vibration plate. Figure 3 The anti-fatigue performance test experiment was carried out on the loudspeakers with four types of double vibration plate distribution shown in the figure. Fatigue here refers to the whole process of crack initiation and expansion of the vibration plate due to the variable load during operation, resulting in fracture failure. In the experiment, the anti-fatigue performance of the vibration plate is characterized by the number of failure cycles. The number of failure cycles can be measured by a roller test, for example, by applying a certain load in the long axis direction, short axis direction or vertical axis direction (perpendicular to the long axis and short axis direction) of the vibration plate through a fatigue testing machine for measurement. A certain load is applied in the long axis direction, short axis direction or vertical axis direction of a single vibration plate and a double vibration plate set in the above distribution method, and the corresponding number of failure cycles is measured. The specific results are shown in Table 1. Among them, the larger the number of failure cycles, the better the anti-fatigue performance and the longer the service life. It should be noted that the number of failure cycles measured in Table 1 is obtained based on the number of cycles in which a single vibration plate breaks or the first of the two vibration plates breaks.

[0050] Table 1

[0051] It can be seen from Table 1 that the two vibration transmission plates ( Figure 3 In the distribution mode a in the middle), the fatigue resistance in the long axis direction, the short axis direction and the vertical axis direction is much greater than the fatigue resistance of a vibration transmission piece that is set separately. From a structural point of view, both sides of the magnetic circuit assembly 110 along the vibration direction are restricted by the vibration transmission piece, which is beneficial to reduce the shaking of the magnetic circuit assembly 110 that deviates from the vibration direction during vibration, thereby preventing the magnetic circuit assembly 110 from colliding with the support part, coil and other structures of the speaker 100 during vibration, thereby ensuring the acoustic output effect of the speaker 100. Furthermore, the fatigue resistance of the two vibration transmission pieces that are symmetrical along the long axis direction of the projection along the vibration direction, the two vibration transmission pieces that are symmetrical along the short axis direction of the projection along the vibration direction, and the two vibration transmission pieces that are symmetrical along the center of the projection along the vibration direction, in the long axis direction, the short axis direction and the vertical axis direction (i.e., the vibration direction) are significantly better than the fatigue resistance of a vibration transmission piece that is set separately. From the perspective of the overall anti-fatigue performance of the vibration plate, its anti-fatigue performance in the long axis direction is slightly worse than that in the short axis direction and the vertical axis direction. In order to prevent the vibration plate from cracking or breaking in the long axis direction, the distribution method of the two vibration plates can focus on the anti-fatigue performance in the long axis direction. The two vibration plates ( Figure 3The fatigue resistance in the long axis direction is better than that of a single vibration transmission sheet and two vibration transmission sheets whose projections along the vibration direction overlap, are symmetrical along the long axis direction, and are centrally symmetrical. Therefore, in some embodiments, in order to further improve the fatigue resistance in the long axis direction of the vibration transmission sheet and ensure that the vibration transmission sheet has a longer service life, the two projections of the two vibration transmission sheets along the vibration direction can be symmetrical along their short axis directions.

[0052] It should be noted that the two vibration transmission plates included in the speaker 100 are not limited to being projected symmetrically distributed along the vibration direction. In some embodiments, the two vibration transmission plates can be vibration transmission plates with different main body shapes. For example, one vibration transmission plate is a circular structure, and the other vibration transmission plate is a runway-shaped structure. In some embodiments, the two vibration transmission plates can be vibration transmission plates with the same main body shape but different internal structures. For example, one vibration transmission plate is Figure 4 The three-connecting rod structure shown in the figure has another vibration transmission plate. Figure 5A-Figure 5B The four-bar structure shown or Figure 6A-6D The two connecting rod structures shown. For another example, the shapes of the connecting rods of the two vibration transmission plates are different (for example, the shapes of the curved portions). For another example, the width dimensions of the connecting rods of the two vibration transmission plates are different, and the width dimension refers to the dimension perpendicular to the extending direction of the connecting rod (see Figure 4 For details about the structure of the vibration plate, please refer to Figure 4-6D and its related description.

[0053] In some embodiments, the two transducers may include a first transducer. Figure 4 Schematic diagram of the structure of the first vibration transmission sheet according to some embodiments of this specification. Figure 4 As shown, the first vibration transmission piece 321 includes a central area 3211 and an edge area 3212, and the edge area 3212 is distributed around the central area 3211, that is, the edge area 3212 is arranged around the central area 3211, and the central area 3211 is connected to the edge area 3212 through a connecting rod (for example, a first connecting rod 3213, a second connecting rod 3214 and a third connecting rod 3215), wherein one end of the connecting rod is connected to the outer edge of the central area 3211, and the other end of the connecting rod is connected to the inner edge of the edge area 3212. When the magnetic circuit assembly 110 is connected to the support portion 130 through the first vibration transmission piece 321, the magnetic circuit assembly 110 is connected to the central area 3211, and the edge area 3212 is connected and fixed to the support portion 130.

[0054] In some embodiments, the edge region 3212 of the first vibration transmitting plate 321 may be a ring-shaped structure. In some embodiments, the shape (outer contour shape) of the edge region 3212 may be as follows: Figure 4The runway shape shown may also be a regular shape or an irregular shape such as a circle, an ellipse, a triangle, a quadrilateral, a pentagon, a hexagon, etc. It should be noted that the runway shape of the vibration transmission plate can be understood as the edge area 3212 of the vibration transmission plate being a runway-shaped annular structure. In some embodiments, the inner contour shape and the outer contour shape of the edge area 3212 may be the same shape. For example, the outer contour shape of the edge area 3212 is a runway shape, and the inner contour shape of the edge area 3212 is also a runway shape. In some embodiments, the inner contour shape and the outer contour shape of the edge area 3212 may be different shapes. For example, the outer contour shape of the edge area 3212 may be a runway shape, and the inner contour shape of the edge area 3212 may be other shapes such as a circle or a rectangle.

[0055] In some embodiments, the central region 3211 is located in the hollow region of the edge region 3212. The central region 3211 may be Figure 4 The structure shown is symmetrical along the short axis and symmetrical along the long axis. In some embodiments, the area between the central area 3211 and the edge area 3212 can also be Figure 4 The shape shown is symmetrical along the minor axis and symmetrical along the major axis. In some embodiments, the shape of the central area 3211 can be circular, triangular, quadrilateral, pentagonal, hexagonal or other regular or irregular shapes. In some embodiments, the shape of the central area 3211 can be the same as the shape of the edge area 3212. For example, the shapes of the edge area 3212 and the central area 3211 can both be annular, that is, the edge area 3212 and the central area 3211 can form concentric circles. In some embodiments, the magnetic circuit assembly 110 can be connected to one of the surfaces of the central area 3211, and the connection method can include but is not limited to gluing, welding, clamping, pin connection or bolt connection.

[0056] In some embodiments, the connecting rod is located between the edge region 3212 and the center region 3211. When the vibration sensor is in operation, the vibration of the magnetic circuit assembly 110 can drive a part of the structure of the vibration sensor (for example, the center region 3211) to move in a direction perpendicular to the plane where the vibration sensor is located (i.e. Figure 3 The magnetic circuit assembly 110 vibrates in a direction perpendicular to the page, so that the vibration generated by the magnetic circuit assembly 110 can be transmitted to the support part 130 through the vibration transmission piece. The vibration of the support part 130 is transmitted to the user's auditory nerve through the bones, blood, muscles, etc. of the user's head, so that the user can hear the sound.

[0057] In some embodiments, there may be multiple connecting rods to achieve the connection between the edge area 3212 and the center area 3211. In some embodiments, there may be 2-5 connecting rods, which can ensure the stability of the first vibration transmission plate 321 during operation, so that the magnetic circuit component 110 is not easily deflected when vibrating along the vibration direction, and has higher reliability. The so-called deflection refers to the difference between the actual vibration direction of the magnetic circuit component 110 and the center area 3211 when the magnetic circuit component 110 vibrates. Figure 2 The vibration direction shown is inconsistent, for example, the actual vibration direction is different from Figure 2 There is an angle between the vibration directions shown, which causes the plane where the edge area 3212 is located to be non-parallel with the plane where the center area 3211 is located, that is, an abnormal state in which there is an angle between the two planes. On the one hand, this state will cause the magnetic circuit assembly 110 to collide with other components of the speaker 100, affecting the acoustic output effect; on the other hand, it will cause the vibration transmission plate to flip around the major axis and the minor axis, making the connecting rod easy to break, affecting the service life of the vibration transmission plate.

[0058] In some embodiments, Figure 4 As shown, the plurality of connecting rods may include a first connecting rod 3213, a second connecting rod 3214, and a third connecting rod 3215. The first connecting rod 3213, the second connecting rod 3214, and the third connecting rod 3215 are connected between the outer edge of the central area 3211 and the inner edge of the edge area 3212. In some embodiments, the first connecting rod 3213, the second connecting rod 3214, and the third connecting rod 3215 are distributed at intervals along the circumference of the central area 3211. In some embodiments, the connecting rod may adopt a circuitous bending structure, which includes a plurality of bending structures (for example, Figure 4 The bending structure M and the bending structure N shown in the dotted box are in a curved shape so that the connecting rod has a preset elastic coefficient. Specifically, the first connecting rod 3213 has two bending structures, which are continuous two-bend shapes, the second connecting rod 3214 has four bending structures, which are continuous four-bend shapes, and the third connecting rod 3215 has three bending structures, which are continuous three-bend shapes. By adopting a bending structure, the elastic coefficient of the connecting rod in a specific direction (for example, the long axis direction) can be reduced to enhance the toughness of the connecting rod and increase the deformation capacity of the vibration transmission plate, thereby effectively reducing the impact of the load on the connecting rod in the specific direction, thereby increasing the service life of the first vibration transmission plate 321.

[0059] In some embodiments, the first connecting rod 3213, the second connecting rod 3214 and the third connecting rod 3215 may be asymmetrically distributed. The asymmetrical distribution here means that the first connecting rod 3213, the second connecting rod 3214 and the third connecting rod 3215 are neither symmetrically distributed along the midline of the long axis direction of the vibration transmission piece nor symmetrically distributed along the midline of the short axis direction of the vibration transmission piece.

[0060] Specifically, refer to Figure 4 The shapes and degrees of bending of the bending structures of the first connecting rod 3213, the second connecting rod 3214 and the third connecting rod 3215 are different, and the spacing between two adjacent connecting rods in the circumferential direction of the central area 3211 is also different. The asymmetric distribution of the three connecting rods can effectively solve the problem of collision and abnormal noise in the housing 131 when the magnetic circuit assembly 110 connected to the central area 3211 shakes.

[0061] It should be noted that Figure 4 The number of connecting rods in the embodiment is only used for exemplary description and does not constitute a limitation. In some embodiments, the number of connecting rods in the first vibration transmission plate 321 may be two or more than three. For example, the vibration transmission plate may further include a fourth connecting rod and / or a fifth connecting rod.

[0062] Figure 5A It is a schematic diagram of the structure of the first vibration transmission piece shown in some embodiments of this specification. Figure 5B It is a schematic diagram of the structure of the first vibration transmission piece shown in some embodiments of this specification. Figure 5A and Figure 5B FIG. 4 shows two embodiments of the first vibration transmitting plate 421 including a first connecting rod 4213, a second connecting rod 4214, a third connecting rod 4215 and a fourth connecting rod 4216. In some embodiments, the first connecting rod 4213, the second connecting rod 4214, the third connecting rod 4215 and the fourth connecting rod 4216 can be used as follows: Figure 5A and Figure 5B Specifically, as shown in FIG. Figure 5A As shown, the first connecting rod 4213 has three bending structures, the second connecting rod 4214 has four bending structures, the third connecting rod 4215 has three bending structures, and the fourth connecting rod 4216 has four bending structures. Figure 5BAs shown, the first connecting rod 4213 has three bending structures, the second connecting rod 4214 has two bending structures, the third connecting rod 4215 has three bending structures, and the fourth connecting rod 4216 has two bending structures. In some embodiments, the first connecting rod 4213 and the third connecting rod 4215 have the same bending structure, the second connecting rod 4214 and the third connecting rod 4215 have the same bending structure, the first connecting rod 4213 and the third connecting rod 4215 are symmetrical about the center of the first vibration transmission plate 421, the second connecting rod 4214 and the third connecting rod 4215 are symmetrical about the center of the first vibration transmission plate 421, and the spacing between two adjacent connecting rods in the circumferential direction of the central area 4211 is the same or approximately the same. Through the symmetrical distribution of the four connecting rods, the vibration transmission plate can be subjected to balanced force in the working state, avoiding the vibration transmission plate from being overweight and flipping, which is beneficial to improving the fatigue resistance of the vibration transmission plate.

[0063] Fig. 6A It is a schematic diagram of the structure of the first vibration transmission piece shown in some embodiments of this specification. Figure 6B It is a schematic diagram of the structure of the first vibration transmission piece shown in some embodiments of this specification. Figure 6C It is a schematic diagram of the structure of the first vibration transmission piece shown in some embodiments of this specification. Fig.6D It is a schematic diagram of the structure of the first vibration transmission piece shown in some embodiments of this specification. Figure 6A-6D FIG. 5 shows various embodiments of the first vibration transmitting plate 521 including a first connecting rod 5213 and a second connecting rod 5214. In some embodiments, the first connecting rod 5213 and the second connecting rod 5214 may be Figures 5A-6D Specifically, as shown in FIG. Fig. 6A As shown, the first connecting rod 5213 has two bending structures, and the second connecting rod 5214 has two bending structures. Figure 6B As shown, the first connecting rod 5213 has three bending structures, and the second connecting rod 5214 has three bending structures. Figure 6C As shown, the first connecting rod 5213 has three bending structures, and the second connecting rod 5214 has three bending structures. Fig.6D As shown, the first connecting rod 5213 has two bending structures, and the second connecting rod 5214 has two bending structures. In some embodiments, the first connecting rod 5213 and the second connecting rod 5214 have the same bending structure, and the first connecting rod 5213 and the second connecting rod 5214 are symmetrical about the geometric center of the first vibration transmission piece 521. By distributing the first connecting rod 5213 and the second connecting rod 5214 symmetrically about the geometric center of the first vibration transmission piece 521, the vibration transmission piece can be subjected to balanced force in the working state, avoiding the vibration transmission piece from being overweighted and flipping, which is beneficial to improving the fatigue resistance of the vibration transmission piece when it flips.

[0064] In some embodiments, the first connecting rod 5213 and the second connecting rod 5214 are distributed along or approximately along the long axis direction of the first vibration transmission plate 521, which can compensate for the fatigue resistance of the first vibration transmission plate 521 in the long axis direction and avoid cracking or breakage in the long axis direction of the vibration transmission plate.

[0065] Table 1 compares the effects of the distribution of the double vibration plates on their fatigue resistance in the long axis, short axis and vertical axis directions. However, the vibration plates are also subject to flipping forces around the long axis and short axis during operation. Therefore, the effects of the fatigue resistance of the vibration plates flipping around the long axis and short axis on their service life cannot be ignored. Figure 2 A certain overturning load is applied to the double vibration transmission plate (including three connecting rods) distributed in the distribution mode shown in the figure around the major axis and around the minor axis, and the corresponding number of failure cycles is measured. The specific results are shown in Table 2.

[0066] Table 2

[0067] It can be seen from Table 2 that the fatigue resistance of two vibration transmission plates whose projections along the vibration direction overlap, two vibration transmission plates whose projections along the vibration direction are symmetrical along their long axis, two vibration transmission plates whose projections along the vibration direction are symmetrical along their short axis, and two vibration transmission plates whose projections along the vibration direction are symmetrical, when flipped around the long axis and flipped around the short axis, is worse than that of a vibration transmission plate set alone. Although two vibration transmission plates (including three connecting rods) symmetrically distributed along the projection of the vibration direction can improve the fatigue resistance of the vibration transmission plate in the long axis direction, short axis direction and vertical axis direction, the fatigue resistance in the long axis direction and short axis direction is very weak, especially the fatigue resistance in the long axis direction.

[0068] By projecting two vibration transmission plates with four connecting rods symmetrically along the vibration direction (such as Figure 5A-Figure 5B The vibration transmission piece shown in FIG. 1 and two vibration transmission pieces with two connecting rods symmetrically distributed along the projection of the vibration direction (such as Figure 6A-6D A certain overturning load is applied to the vibration transmission piece (shown in FIG. 1 ) around the long axis and around the short axis, and the corresponding number of failure cycles is measured. Figure 6A-6D The number of failure cycles corresponding to the double vibration plate of the two connecting rods with symmetrical distribution shown is greater than that of the double vibration plate of the two connecting rods with symmetrical distribution shown Figure 5A-Figure 5B The number of failure cycles corresponding to the double vibration transmission plate with symmetrically distributed four connecting rods shown, and the results of the better number of failure cycles are listed as examples, as shown in Table 3.

[0069] Table 3

[0070] Based on Table 2 and Table 3, it can be seen that in some embodiments, in order to improve the fatigue resistance of the vibration transmission piece around the long axis direction and the short axis direction, two vibration transmission pieces symmetrically distributed along the projection of the vibration direction can both use two symmetrically distributed connecting rods. For example, the two vibration transmission pieces both use Figure 6A-6D The two connecting rods shown are symmetrically distributed about the center, which can enhance the anti-fatigue performance of the vibration transmission piece in the long axis direction, short axis direction and vertical axis direction, and at the same time improve the anti-fatigue performance of the vibration transmission piece when flipping around the long axis direction and around the short axis direction.

[0071] Figure 7 They are respectively adopted Figure 6B-6D The frequency response curve of the speaker with the vibration plate shown. Figure 7 In the figure, curve #1 represents the speaker using Figure 6B The frequency response curve of the vibration plate shown in the figure, curve #2 represents the speaker using Figure 6C The frequency response curve of the vibration transmission piece shown in the figure, curve #3 represents the speaker adopts Fig.6D The frequency response curve of the vibration transmission piece is shown. Figure 7 As shown, the resonant frequency of the speaker using the double-vibration plate structure with two connecting rods is not greater than 300 Hz, which can improve the frequency response of the speaker at low frequencies, and at the same time make the frequency response curve of the speaker relatively flat in a wider frequency band, thereby improving the signal-to-noise ratio of the speaker in a specific frequency band (for example, 300 Hz-5000 Hz). It should be noted that the above frequency response curve is obtained by clamping the ear hook of the speaker, testing the vibration displacement of the speaker through a Klippel analyzer, and converting the vibration displacement into acceleration (dB value, referring to acceleration 1E-6m / s^2), wherein the test voltage is 1Vrms.

[0072] In some embodiments, the two vibration transmission plates may include a first vibration transmission plate and a second vibration transmission plate, and the first vibration transmission plate and the second vibration transmission plate have the same structure. The first vibration transmission plate and the second vibration transmission plate may have a long axis direction and a short axis direction (that is, the long axis dimension is larger than the short axis dimension), for example Figure 4 The runway-shaped first vibration transmission piece 321 is shown. In order to ensure the fatigue resistance of the two vibration transmission pieces in different directions (e.g., long axis direction, short axis direction, vertical axis direction, around long axis direction, around short axis direction) and improve the service life of the two vibration transmission pieces, it is necessary to limit the stiffness coefficients of the two vibration transmission pieces in the long axis direction, short axis direction, vertical axis direction, around long axis direction, and around short axis direction.

[0073] In some embodiments, the first vibration transmitting plate and the second vibration transmitting plate may have a long axis direction and a short axis direction, and the equivalent stiffness of the first vibration transmitting plate and the second vibration transmitting plate along the long axis direction may be in the range of 7500N / m-12500N / m, so as to ensure the fatigue resistance of the first vibration transmitting plate and the second vibration transmitting plate in the long axis direction and prevent the two vibration transmitting plates from cracking or breaking along the long axis direction. The preferred range of the equivalent stiffness of the first vibration transmitting plate and the second vibration transmitting plate along the long axis direction may include 8500N / m-11500N / m, 9000N / m-10000N / m or 9500N / m-10500N / m. It should be noted that the equivalent stiffness of the first vibration transmitting plate and the second vibration transmitting plate along the long axis direction refers to the ability of the two vibration transmitting plates to resist deformation and pulling along the long axis direction.

[0074] In some embodiments, the first vibration transmitting plate and the second vibration transmitting plate may have a long axis direction and a short axis direction, and the equivalent stiffness of the first vibration transmitting plate and the second vibration transmitting plate in the short axis direction may be in the range of 15000N / m-25000N / m, so as to ensure the fatigue resistance of the first vibration transmitting plate and the second vibration transmitting plate along the short axis direction, and prevent the first vibration transmitting plate and the second vibration transmitting plate from cracking or breaking along the short axis direction. The preferred range of the equivalent stiffness of the first vibration transmitting plate and the second vibration transmitting plate along the short axis direction may include 16000N / m-24000N / m, 17000N / m-23000N / m, 18000N / m-22000N / m or 19000N / m-21000N / m. It should be noted that the equivalent stiffness of the first vibration transmitting plate and the second vibration transmitting plate in the short axis direction refers to the ability of the two vibration transmitting plates to resist deformation and pulling along the short axis direction.

[0075] In some embodiments, the first vibration sensor may be circular (eg, Fig. 10A and Fig. 10B When the edge area 1012 shown is annular, and the major axis size and the minor axis size are the same), the equivalent stiffness of the first vibration transmitting plate and the second vibration transmitting plate along the extension direction of the connecting rod can be in the range of 10000N / m-20000N / m, so as to ensure the fatigue resistance of the first vibration transmitting plate and the second vibration transmitting plate along the extension direction of the connecting rod and prevent the first vibration transmitting plate or the second vibration transmitting plate from cracking or breaking in the extension direction of the connecting rod. When the first vibration transmitting plate and the second vibration transmitting plate are circular, the preferred range of the equivalent stiffness of the first vibration transmitting plate and the second vibration transmitting plate along the extension direction of the connecting rod may include 11000N / m-19000N / m, 12000N / m-18000N / m, 13000N / m-17000N / m or 14000N / m-16000N / m.

[0076] In some embodiments, when the first vibration transmitting plate and the second vibration transmitting plate are in a runway shape or a circle, the equivalent stiffness of the first vibration transmitting plate and the second vibration transmitting plate in the vertical axis direction (i.e., the vibration direction) may be in the range of 1200N / m-2000N / m, so as to ensure the fatigue resistance of the first vibration transmitting plate and the second vibration transmitting plate in the vertical axis direction and prevent the first vibration transmitting plate or the second vibration transmitting plate from cracking or breaking in the vertical axis direction. When the first vibration transmitting plate and the second vibration transmitting plate are in a runway shape or a circle, the preferred range of the equivalent stiffness of the first vibration transmitting plate and the second vibration transmitting plate in the vertical axis direction may include 1300N / m-1900N / m, 1400N / m-1800N / m or 1500N / m-1700N / m. The equivalent stiffness K of the first vibration transmitting plate and the second vibration transmitting plate in the vertical axis direction (i.e., the vibration direction) can be calculated through the mass m of the magnetic circuit component and the resonant frequency f0 of the speaker through the formula K=m×(2πf0) 2 Obtained by calculation.

[0077] In some embodiments, the first vibration transmitting plate and the second vibration transmitting plate may have a long axis direction and a short axis direction, and the equivalent stiffness of the first vibration transmitting plate and the second vibration transmitting plate when flipping around the long axis direction may be in the range of 0.05-0.15N*m / rad, so as to ensure the fatigue resistance of the first vibration transmitting plate and the second vibration transmitting plate when flipping around the long axis direction, and prevent the first vibration transmitting plate or the second vibration transmitting plate from cracking or breaking when flipping around the long axis direction. The preferred range of the equivalent stiffness of the first vibration transmitting plate and the second vibration transmitting plate when flipping around the long axis direction may include 0.07-0.14N*m / rad, 0.08-0.12N*m / rad or 0.09-0.11N*m / rad. It should be noted that the equivalent stiffness of the first vibration transmitting plate and the second vibration transmitting plate when flipping around the long axis direction refers to the ability of the two vibration transmitting plates to resist deformation and pulling when flipping around the long axis direction.

[0078] In some embodiments, the first vibration transmitting plate and the second vibration transmitting plate may have a major axis direction and a minor axis direction, and the equivalent stiffness of the first vibration transmitting plate and the second vibration transmitting plate when flipping around the minor axis direction may be in the range of 0.1-0.2N*m / rad, so as to ensure the fatigue resistance of the first vibration transmitting plate when flipping around the minor axis direction, and prevent the first vibration transmitting plate from cracking or breaking when flipping around the minor axis direction. The preferred range of the equivalent stiffness of the first vibration transmitting plate when flipping around the minor axis direction may include 0.12-0.18N*m / rad, 0.13-0.17N*m / rad or 0.14-0.16N*m / rad. It should be noted that the equivalent stiffness of the first vibration transmitting plate and the second vibration transmitting plate when flipping around the minor axis direction refers to the ability of the two vibration transmitting plates to resist deformation and pulling when flipping around the minor axis direction.

[0079] In some embodiments, when the first vibration transmitting plate and the second vibration transmitting plate are circular, the first vibration transmitting plate and the second vibration transmitting plate are subjected to a flipping force around the extension direction of the connecting rod, and the equivalent stiffness of the first vibration transmitting plate and the second vibration transmitting plate flipping around the extension direction of the connecting rod can be in the range of 0.1N*m / rad-0.15N*m / rad, so as to ensure the fatigue resistance of the first vibration transmitting plate and the second vibration transmitting plate when flipping around the extension direction of the connecting rod, and prevent the first vibration transmitting plate or the second vibration transmitting plate from cracking or breaking when flipping around the extension direction of the connecting rod. When the first vibration transmitting plate and the second vibration transmitting plate are circular, the preferred range of the equivalent stiffness of the first vibration transmitting plate and the second vibration transmitting plate flipping around the extension direction of the connecting rod can include 0.11-0.14N*m / rad, 0.12-0.135N*m / rad or 0.125-0.13N*m / rad. It should be noted that the flipping stiffness of the first vibration transmitting plate and the second vibration transmitting plate can be calculated by moment = stiffness * angle of rotation (radian system).

[0080] Fig. 10A and Fig. 10B Schematic diagram of the structure of the vibration transmission sheet provided according to some embodiments of this specification. Fig. 10A As shown, the edge area 1012 of the vibration transmission plate is in the shape of a ring, the center area 1011 is located in the hollow area of ​​the edge area, one end of the connecting rod 1013 is connected to the outer edge of the center area 1011, and the other end is connected to the inner edge of the edge area 1012. In some embodiments, the connecting rod 1013 may adopt a circuitous bending structure, and the circuitous bending structure includes a plurality of bending structures, and the bending structure is a curved shape, so that the connecting rod has a preset elastic coefficient. Specifically, the connecting rod 1013 has two bending structures, which are two continuous bends. By adopting a bending structure, the elastic coefficient of the connecting rod in a specific direction (for example, a radial direction) can be reduced to enhance the toughness of the connecting rod and increase the deformation capacity of the vibration transmission plate, thereby effectively reducing the impact of the load on the connecting rod in the specific direction, thereby increasing the service life of the vibration transmission plate. In some embodiments, the number of connecting rods 1013 can be multiple, for example, Fig. 10A The two or more connecting rods 1013 shown can be symmetrically arranged so that when the magnetic circuit assembly vibrates along the vibration direction, the force on the magnetic circuit assembly is balanced, thereby reducing the vibration of the magnetic circuit assembly deviating from the vibration direction. Fig. 10B The connecting rod 1013 may be an arc-shaped sheet structure, and the number of the connecting rods 1013 is three, and the three connecting rods 1013 may be symmetrical about the center of the vibration transmission sheet. It should be noted that the number of the connecting rods is not limited to Fig. 10A and Fig. 10B The two and three mentioned above can also be more than three. In addition, the connecting rod is not limited to Fig. 10A and Fig. 10B The bent structure or arc-shaped sheet structure shown.

[0081] In some embodiments, the stiffness of the first vibration transmitting plate and the second vibration transmitting plate in different directions is related to the structure of the connecting rod (e.g., the degree of bending) and the distribution position of the connecting rod relative to the central area and the edge area. In some embodiments, the stiffness coefficient of the first vibration transmitting plate and the second vibration transmitting plate is related to the parameters of the connecting rod itself, for example, the stiffness coefficient of the first vibration transmitting plate and the second vibration transmitting plate is related to the thickness and width of the connecting rod.

[0082] In some embodiments, the width and thickness of the connecting rod can be adjusted to make the stiffness coefficients of the two vibration transmission plates in each direction meet the specified range. The width of the connecting rod refers to the dimension perpendicular to the extending direction of the connecting rod (see Figure 4 The A dimension shown in the figure), the thickness dimension of the connecting rod refers to the dimension of the connecting rod along the vertical axis direction (i.e., the vibration direction). In some embodiments, the width range of each connecting rod can be 0.2mm-0.66mm. The preferred range of the width of the connecting rod can include 0.3mm-0.52mm. In some embodiments, the thickness range of each connecting rod can be 0.1mm-0.15mm. In some embodiments, by adjusting the width dimension and thickness dimension of the connecting rod, the stiffness coefficient of the connecting rod can be increased so that the stiffness of the first vibration transmission plate and the second vibration transmission plate in each direction meets the limited range, and the resonance peaks generated by the first vibration transmission plate and the second vibration transmission plate when the magnetic circuit assembly 110 vibrates can also meet a specific range. In some embodiments, the first vibration transmission plate and the second vibration transmission plate can generate a resonance peak not exceeding 300Hz when the magnetic circuit assembly 110 vibrates, which can improve the frequency response of the speaker 100 at low frequencies, and at the same time make the frequency response curve of the speaker 100 in a wider frequency band relatively flat, thereby improving the signal-to-noise ratio of the speaker 100.

[0083] In addition, in some embodiments, the stiffness coefficient of the first vibration transmission plate and the second vibration transmission plate is also related to their own materials. In some embodiments, the materials of the two vibration transmission plates can be beryllium copper, stainless steel, etc.

[0084] In some embodiments, the width of the connecting rod may be different along its extension direction. Figure 4As shown, taking the first connecting rod 3213 as an example, the first connecting rod 3213 includes a first part 32131 connecting the central area 3211, a second part 32133 connecting the edge area 3212, and a third part 32132 located between the first part 32131 and the second part 32133. In the working state of the vibration transmission plate, the stress of the first part 32131 connected to the central area 3211 and the second part 32133 connected to the edge area 3212 are relatively concentrated. In order to ensure the structural stability of the connecting rod and avoid cracking or breaking of the first part 32131 and the second part 32133 of the connecting rod, the stiffness coefficient of the first part 32131 and the second part 32133 of the connecting rod can be increased. In some embodiments, the width of the first part 32131 and the second part 32133 can be greater than the width of the third part 32132 to increase the stiffness coefficient of the first part 32131 and the second part 32133 of the connecting rod, thereby enhancing the structural strength between the connecting rod and the central area 3211 and the edge area 3212. The width of different areas of the connecting rod is different. Taking the first connecting rod 3213 as an example, the resonant frequency of the speaker is mainly negatively correlated with the width of the third part 32132. For example, the larger the width of the third part 32132, the smaller the resonant frequency of the speaker, and the anti-fatigue performance of the speaker is positively correlated with the width of the connecting rod. In order to prevent the resonant frequency of the speaker from being too high and ensure the anti-fatigue performance of the speaker, the width of the third part 32132 should not be too large or too small. Based on this, in some embodiments, the width of the third part 32132 is 0.2mm-0.66mm, so that the resonant frequency of the speaker is not greater than 300Hz, while ensuring the anti-fatigue performance of the vibration transmission sheet and improving the service life of the vibration transmission sheet.

[0085] Continue to see Figure 1 and Figure 2 In some embodiments, the magnetic circuit assembly 110 includes Figure 2The first magnet 111, the magnetic plate 112, the second magnet 113 and the magnetic cover 114 are sequentially arranged in the vibration direction. In some embodiments, the first magnet 111 and the second magnet 113 can be connected to opposite sides of the magnetic plate 112 along the vibration direction. In some embodiments, the magnetic cover 114 is arranged on the side of the second magnet 113 away from the first magnet 111, and the magnetic cover 114 surrounds the first magnet 111, the magnetic plate 112, and the second magnet 113 in the vibration direction (that is, the bottom surface of the groove of the magnetic cover 114 is connected to the side of the second magnet 113 away from the first magnet 111). In some embodiments, the speaker 100 may also include a coil 140, and the coil 140 extends into the gap between the first magnet 111 and the magnetic cover 114 from the side away from the magnetic cover 114 along the vibration direction. The magnetic field generated by the coil 140 after being energized interacts with the magnetic field formed by the magnetic circuit assembly 110, thereby driving the magnetic circuit assembly 110 to generate mechanical vibration.

[0086] In some embodiments, the two vibration transmission plates of the speaker 100 may include a first vibration transmission plate 121 and a second vibration transmission plate 122 (hereinafter referred to as vibration transmission plates), wherein the first vibration transmission plate 121 and the second vibration transmission plate 122 have the same structure. The vibration transmission plate may be the first vibration transmission plate provided in any embodiment of the present specification (for example, the first vibration transmission plate 321, 421 or 521). In some embodiments, the first vibration transmission plate 121 is disposed on the side of the first magnet 111 away from the second magnet 113 to support the magnetic circuit assembly 110, and the second vibration transmission plate 122 is disposed on the side of the second magnet 113 away from the first magnet 111 to support the magnetic circuit assembly 110. In some embodiments, the central area of ​​the first vibration transmission plate 121 is connected to the side of the first magnet 111 away from the second magnet 113, and the central area of ​​the second vibration transmission plate 122 is connected to the side of the second magnet 113 away from the first magnet 111. The two projections of the first vibration transmission piece 121 and the second vibration transmission piece 122 along the vibration direction may overlap, be symmetrical along the long axis direction, be symmetrical along the short axis direction, or be centrally symmetrical (for example, Figure 3 4 distribution modes are shown).

[0087] In some embodiments, the vibration transmitter and the magnetic circuit assembly 110 are located in a receiving cavity of the shell 131. In some embodiments, the vibration transmitter can be directly connected to the shell 131. For example, the edge area of ​​the vibration transmitter is connected to the inner wall of the shell 131 in a circumferential direction by one or more methods such as snap-fitting and gluing. For another example, the shell 131 is a structure with an opening, and the edge area of ​​the vibration transmitter is located at the opening on the shell 131, and the opening is covered with a cover plate to fix the edge area of ​​the vibration transmitter and the shell 131. The central area of ​​the vibration transmitter is used to connect the magnetic circuit assembly 110. For example, the central area is connected to the magnetic circuit assembly 110 by bonding, welding, threaded connection, etc. In some embodiments, a first connector 150 is provided on one side of the central area of ​​the first vibration transmission piece 121 close to the magnetic circuit assembly 110, and a second connector 151 is provided on one side of the central area of ​​the second vibration transmission piece 122 close to the magnetic circuit assembly. The first connector 150 and the second connector 151 can be fixedly connected to the magnetic circuit assembly 110 through a screw 160, thereby realizing the connection between the central area of ​​the vibration transmission piece and the magnetic circuit assembly 110. Specifically, a threaded hole is provided in the central area of ​​the first connector 150 and the second connector 151, and the two ends of the screw 160 are respectively connected to the threaded holes in the central areas of the first connector 150 and the second connector 151 through threaded matching. When the magnetic circuit assembly 110 vibrates, the vibration can be transmitted to the housing 131 through the vibration transmission piece, and finally transmitted to the auditory nerve of the user, so that the user can hear the sound. It should be noted that the connection method of the first connector 150 and the second connector 151 to the central area of ​​the vibration transmission piece is not limited to the above-mentioned threaded connection, and can also be welding, bonding, interference fit, etc. The connection mode between the first connecting member 150 and the first vibration transmitting plate 121 and the connection mode between the second connecting member 151 and the second vibration transmitting plate 122 may be the same or different. For example, the first connecting member 150 and the central area of ​​the first vibration transmitting plate 121 are connected by threaded connection, and the second connecting member 151 and the central area of ​​the second vibration transmitting plate 122 are connected by welding.

[0088] The loudspeaker 100 uses double vibration-transmitting plates to support the magnetic circuit assembly 110 from both sides of the magnetic circuit assembly 110 along the vibration direction, thereby reducing the shaking of the magnetic circuit assembly 110 that deviates from the vibration direction during vibration, and correspondingly reducing the influence of the shaking of the magnetic circuit assembly 110 on the vibration-transmitting plate, thereby reducing the amplitude of the vibration-transmitting plate folding around its own long axis or short axis direction, thereby greatly extending the time before the vibration-transmitting plate breaks and is damaged, thereby ensuring the service life of the vibration-transmitting plate.

[0089] In some embodiments, the magnetic circuit assembly 110 may collide with the vibration transmission piece during the vibration process, affecting the acoustic performance of the speaker 100 and the service life of the vibration transmission piece. In order to avoid the collision between the magnetic circuit assembly 110 and the vibration transmission piece in the vibration direction, the distance B between the two opposite sides of the first magnet 111 and the first vibration transmission piece 121 (see Figure 2 ) is not less than 0.9 mm. Similarly, the distance C between the two opposite sides of the magnetic shield 114 and the second vibration transmission plate 122 (see Figure 2 ) is not less than 0.9 mm. In some embodiments, in order to minimize the size of the speaker 100, improve the portability of the speaker 100, and avoid collision between the magnetic circuit assembly 110 and the vibration transmission sheet, the distance B and the distance C may be in the range of 0.9 mm-1.8 mm. Preferably, the distance B and the distance C may be in the range of 0.9 mm-1.6 mm. More preferably, the distance B and the distance C may be in the range of 0.9 mm-1.4 mm.

[0090] By limiting the distance between the magnetic circuit assembly 110 and the vibration transmission piece, it is possible to avoid collision between the magnetic circuit assembly 110 and the vibration transmission piece during vibration, thereby ensuring the acoustic performance of the speaker 100 and the service life of the vibration transmission piece.

[0091] Reference Figure 2 In some embodiments, the magnetic circuit assembly 110 may also collide with a bracket (for example, the first bracket 132), a coil 140 or a housing 131 during vibration that deviates from the vibration direction. In order to avoid collision between the magnetic shield 114 of the magnetic circuit assembly 110 and the coil 140, and between the magnetic circuit assembly 110 and the bracket in a direction perpendicular to the vibration direction, the distance D (also referred to as the inner magnetic gap) between the magnetic element (for example, the first magnet, the magnetic plate and the second magnet) and the first bracket 132 and the distance D (also referred to as the outer magnetic gap) between the magnetic shield 114 and the coil 140 are not less than 0.3 mm in the direction perpendicular to the vibration direction. In order to avoid collision between the magnetic shield 114 of the magnetic circuit assembly 110 and the housing 131 in a direction perpendicular to the vibration direction, the distance E (see FIG. 1 ) between the two opposite sides of the magnetic shield 114 and the housing 131 in the direction perpendicular to the vibration direction. Figure 2 ) is not less than 0.3 mm. In some embodiments, in order to minimize the size of the speaker 100 to improve the portability of the speaker 100 and avoid collision between the magnetic circuit assembly 110 and the coil 140 or the housing 131, the distance D and the distance E may be in the range of 0.3 mm to 1 mm. Preferably, the distance D and the distance E may be in the range of 0.3 mm to 0.8 mm. More preferably, the distance D and the distance E may be in the range of 0.3 mm to 0.6 mm.

[0092] In some embodiments, in combination Figure 1 and Figure 2, the support part 130 may also include a first bracket 132 and a second bracket 133, which are arranged at intervals along the vibration direction and fixedly connected to the housing 131. The first bracket 132 and the second bracket 133 provide installation platforms for the first vibration transmitting piece 121 and the second vibration transmitting piece 122 respectively, and the first bracket 132 also provides an installation platform for the coil 140. In some embodiments, the edge area of ​​the first vibration transmitting piece 121 and the coil 140 are fixed on the first bracket 132, and the edge area of ​​the second vibration transmitting piece 122 is fixed on the second bracket 133. Specifically, a part of the edge area of ​​the first vibration transmitting piece 121 (for example, a part close to its peripheral side) is embedded in the first bracket 132, and the coil 140 is connected to the first bracket 132 near the side of the magnetic circuit assembly 110. In some embodiments, the coil 140 may also be fixed to the housing 131 or the first bracket 132 in other ways. For example, the coil 140 is directly connected to the inner wall of the housing 131 through a connecting rod. For another example, the first bracket 132 does not extend into the magnetic gap between the magnetic cover 114 and the magnetic element (e.g., the first magnet, the magnetic plate, and the second magnet), one end of the coil 140 is connected to the first bracket 132, and the other end extends into the magnetic gap. A portion of the edge region of the second vibration transmission plate 122 (e.g., a portion close to its peripheral side) is embedded in the second bracket 133.

[0093] By setting a first bracket 132 to fix the first vibration transmission plate 121 and the coil 140, the consistency of vibration of the vibration component can be ensured. At the same time, by setting a second bracket 133 to fix the second vibration transmission plate 122, the structural stability between the coil 140, the vibration transmission plate and the magnetic circuit assembly 110 can be improved, thereby ensuring that the coil 140, the vibration transmission plate and the magnetic circuit assembly 110 can operate reliably during the long-term operation of the speaker 100.

[0094] The end provided with the magnetic shield 114 is regarded as the bottom of the magnetic circuit assembly 110. Since the magnetic shield 114 is provided at the bottom of the magnetic circuit assembly 110, the center of gravity of the magnetic circuit assembly 110 is closer to the bottom thereof. In some embodiments, the hardness of the second vibration transmission piece 122 close to the bottom of the magnetic circuit assembly 110 can be made greater than that of the first vibration transmission piece 121 far from the bottom of the magnetic circuit assembly 110, so that the second vibration transmission piece 122 can adapt to the larger shaking of the magnetic circuit assembly 110 near its bottom area, which is conducive to reducing the shaking of the magnetic circuit assembly 110 when vibrating in the vibration direction, and preventing the magnetic circuit assembly 110 from tilting. In some embodiments, the Young's modulus of the second vibration transmission piece 122 is greater than that of the first vibration transmission piece 121, so that the hardness of the second vibration transmission piece 122 is greater than that of the first vibration transmission piece 121. For example, the material of the second vibration transmission piece 122 is stainless steel with a larger Young's modulus, and the material of the first vibration transmission piece 121 is beryllium copper with a smaller Young's modulus. In order for the second vibration transmission plate 122 to be able to adapt to the larger shaking of the magnetic circuit assembly 110 near its bottom area, reduce the shaking of the magnetic circuit assembly 110 when it vibrates in the vibration direction, and prevent the magnetic circuit assembly 110 from tilting, in some embodiments, the ratio of the Young's modulus of the second vibration transmission plate 122 to the Young's modulus of the first vibration transmission plate 121 is in the range of 1-1.5.

[0095] By setting a second vibration transmission plate 122 with a harderness greater than that of the first vibration transmission plate 121, the second vibration transmission plate 122 can adapt to a larger amplitude shaking and a heavier shaking of the magnetic circuit assembly 110 near its bottom area, thereby ensuring that the service life of the first vibration transmission plate 121 and the second vibration transmission plate 122 are close to each other, and preventing the magnetic circuit assembly 110 from tilting, which is beneficial to reducing the shaking of the magnetic circuit assembly 110 when it vibrates in the vibration direction.

[0096] In some embodiments, the first vibration transmitting plate 121 and the second vibration transmitting plate 122 included in the speaker 100 may be asymmetrically distributed between two projections along the vibration direction. In this case, other parts of the speaker 100 (such as the support portion 130 and the magnetic circuit component 110) may refer to Figure 1 and Figure 2 And related instructions.

[0097] In some embodiments, when the two projections of the two vibration transmission plates along the vibration direction are asymmetrically distributed, the two vibration transmission plates may be vibration transmission plates with different structures. In some embodiments, the shapes of the two vibration transmission plates with different structures may be different, for example, the first vibration transmission plate 121 is a circular vibration transmission plate, and the second vibration transmission plate 122 is a racetrack-shaped vibration transmission plate. In some embodiments, the number and / or structure of the connecting rods included in the two vibration transmission plates with different structures may be different. Figure 7 Schematic diagrams of three distributions of vibration transmission plates according to some embodiments of this specification. Fig. 9Schematic diagrams of three distributions of vibration transmission plates according to some embodiments of this specification. Figure 8 Figures a, b and c show various embodiments of two vibration transmission plates with different structures including different numbers of connecting rods. Fig. 9 Figures a, b and c show various embodiments of two vibration transmission plates with different structures including different structures of connecting rods. The first vibration transmission plate 121 or the second vibration transmission plate 122 can be Figure 4-6D Any of the ones shown.

[0098] In some embodiments, when two vibration transmitting plates are asymmetrically distributed along two projections of the vibration direction, the two vibration transmitting plates may be two vibration transmitting plates with the same structure, but the arrangement angles of the two vibration transmitting plates are different. Specifically, taking a runway-shaped vibration transmitting plate as an example, the vibration transmitting plate has a long axis direction and a short axis direction, and the long axis direction of the first vibration transmitting plate 121 and the long axis direction of the second vibration transmitting plate 122 are arranged at a certain angle, so that the arrangement angles of the two vibration transmitting plates are different. For example, the long axis direction of the first vibration transmitting plate 121 is perpendicular to the long axis direction of the second vibration transmitting plate 122, the inner edge of the edge area of ​​the first vibration transmitting plate 121 is located at the outer edge of the edge area of ​​the second vibration transmitting plate 122, and the central area of ​​the first vibration transmitting plate 121 does not contact the central area of ​​the second vibration transmitting plate 122, and the magnetic circuit component is located in the central area of ​​the first vibration transmitting plate 121 or the second vibration transmitting plate 122.

[0099] The asymmetrically distributed first vibration transmitting plate 121 and the second vibration transmitting plate 122 are respectively located on opposite sides of the magnetic circuit assembly 110 along the vibration direction. The vibration of the magnetic circuit assembly 110 is limited by the vibration transmitting plates on both sides. On the one hand, it can reduce the shaking of the magnetic circuit assembly 110 during vibration. On the other hand, by setting up the double vibration transmitting plates, the shaking of the magnetic circuit assembly 110 is reduced, and the amplitude of the vibration transmitting plates folding around their own long axis or short axis direction is reduced, so that the time for the vibration transmitting plates to break and be damaged is greatly extended, thereby ensuring the service life of the vibration transmitting plates. For the specific description of the first vibration transmitting plate 121 and the second vibration transmitting plate 122, please refer to the previous text (for example Figure 1 , Figure 4-6D ) The relevant description about the vibration transmission piece in the above description will not be repeated here.

[0100] In some embodiments, the first vibration-transmitting plate 121 is disposed away from the magnetic shield 114 of the magnetic circuit assembly 110, and the second vibration-transmitting plate 122 is disposed close to the magnetic shield 114 of the magnetic circuit assembly 110. Since the magnetic shield 114 is disposed at the bottom of the magnetic circuit assembly 110, the center of gravity of the magnetic circuit assembly 110 is closer to the bottom thereof. That is to say, in the vibration direction, the distance from the center of gravity of the magnetic circuit assembly 110 to the second vibration-transmitting plate 122 is smaller than the distance to the first vibration-transmitting plate 121. Therefore, the second vibration-transmitting plate 122 needs to have greater rigidity and hardness than the first vibration-transmitting plate 121 to resist flipping and fatigue.

[0101] In some embodiments, the hardness of the second vibration transmission piece 122 can be greater than that of the first vibration transmission piece 121, so that the second vibration transmission piece 122 can adapt to the larger shaking of the magnetic circuit assembly 110 near its bottom area, which is conducive to reducing the shaking of the magnetic circuit assembly 110 when it vibrates in the vibration direction, and preventing the magnetic circuit assembly 110 from tilting. In some embodiments, the width of the connecting rod of the second vibration transmission piece 122 can be greater than the width of the connecting rod of the first vibration transmission piece 121, so that the hardness of the second vibration transmission piece 122 is greater than that of the first vibration transmission piece 121.

[0102] By making the width of the connecting rod of the second vibration transmitting plate 122 greater than the width of the connecting rod of the first vibration transmitting plate 121, the hardness of the second vibration transmitting plate 122 is made greater than the hardness of the first vibration transmitting plate 121, so that the second vibration transmitting plate 122 can adapt to the larger shaking and heavier shaking of the magnetic circuit assembly 110 near its bottom area, which can ensure that the service life of the first vibration transmitting plate 121 and the second vibration transmitting plate 122 are close to each other, and at the same time prevent the magnetic circuit assembly 110 from tilting, which is beneficial to reduce the shaking of the magnetic circuit assembly 110 when it vibrates in the vibration direction.

[0103] In some embodiments, the vibration transmitting plate generates a resonance peak of no more than 300 Hz (e.g., 150 Hz-250 Hz) when the magnetic circuit assembly 110 vibrates, which can improve the frequency response of the speaker 100 at low frequencies, and at the same time make the frequency response curve of the speaker 100 relatively flat in a wider frequency band, thereby improving the signal-to-noise ratio of the speaker 100. In some embodiments, the thickness and width of the connecting rod of the vibration transmitting plate can be adjusted to make the second vibration transmitting plate 122 generate a resonance peak of no more than 300 Hz when the magnetic circuit assembly 110 vibrates. However, adjusting the width and thickness of the connecting rod of the vibration transmitting plate will affect the frequency of the resonance peak generated by the vibration transmitting plate when the magnetic circuit assembly 110 vibrates. In order to ensure that the second vibration transmission plate 122 generates a resonance peak not exceeding 300 Hz when vibrating with the magnetic circuit assembly 110, the thickness of the connecting rod of the second vibration transmission plate 122 can be made smaller than the thickness of the connecting rod of the first vibration transmission plate 121 while the width of the connecting rod of the second vibration transmission plate 122 is made greater than the width of the connecting rod of the first vibration transmission plate 121, thereby improving the frequency response of the second vibration transmission plate 122 at low frequencies and making the frequency response curve of the speaker 100 relatively flat within a wider frequency band, thereby improving the signal-to-noise ratio of the speaker 100. It should be noted that increasing the thickness of the connecting rod of the second vibration transmission plate 122 while reducing the width of the connecting rod of the second vibration transmission plate 122 can also reduce the shaking of the magnetic circuit assembly 110 when it vibrates in the vibration direction, while ensuring that the second vibration transmission plate 122 produces a resonance peak of no more than 300 Hz when the magnetic circuit assembly 110 vibrates. However, increasing the width of the connecting rod of the second vibration transmission plate 122 is more conducive to reducing the shaking of the magnetic circuit assembly 110 when it vibrates in the vibration direction. Therefore, it can be given priority to increase the width of the connecting rod of the second vibration transmission plate 122 while reducing the thickness of the connecting rod of the second vibration transmission plate 122.

[0104] By making the width of the connecting rod of the second vibration transmission plate 122 larger than the width of the connecting rod of the first vibration transmission plate 121, and the thickness of the connecting rod of the second vibration transmission plate 122 smaller than the thickness of the connecting rod of the first vibration transmission plate 121, the magnetic circuit assembly 110 can be prevented from tilting, which is beneficial to reduce the shaking of the magnetic circuit assembly 110 when vibrating in the vibration direction, and improve the frequency response of the speaker 100 at low frequencies, while making the frequency response curve of the speaker 100 relatively flat within a wider frequency band.

[0105] In some embodiments, the number of connecting rods of the second vibration transmission plate 122 can be greater than the number of connecting rods of the first vibration transmission plate 121, so that the hardness of the second vibration transmission plate 122 is greater than the hardness of the first vibration transmission plate 121, which is beneficial to reduce the shaking of the magnetic circuit assembly 110 when it vibrates in the vibration direction and prevent the magnetic circuit assembly 110 from tilting.

[0106] In some implementations, Figure 8As shown in a, the second vibration transmission piece 122 includes 4 connecting rods, and the first vibration transmission piece 121 includes 3 connecting rods. Figure 8 As shown in FIG. 1 b, the second vibration transmission piece 122 includes three connecting rods, and the first vibration transmission piece 121 includes two connecting rods. Figure 8 As shown in c, the second vibration transmission plate 122 includes four connecting rods, and the first vibration transmission plate 121 includes two connecting rods.

[0107] In some embodiments, the Young's modulus of the material constituting the second vibration transmission plate 122 can be made greater than the Young's modulus of the material constituting the first vibration transmission plate 121, so that the hardness of the second vibration transmission plate 122 is greater than the hardness of the first vibration transmission plate 121, which is beneficial to reduce the shaking of the magnetic circuit assembly 110 when vibrating in the vibration direction, and prevent the magnetic circuit assembly 110 from tilting.

[0108] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of this specification. Although not explicitly stated here, those skilled in the art may make various modifications, improvements and corrections to this specification. Such modifications, improvements and corrections are suggested in this specification, so such modifications, improvements and corrections still belong to the spirit and scope of the exemplary embodiments of this specification.

Claims

1. A speaker, comprising: The support part, the magnetic circuit component and the positioning component are characterized in that: The magnetic circuit assembly is connected to the support portion through the positioning assembly, and the magnetic circuit assembly vibrates relative to the support portion; The positioning component includes two vibration transmission plates, which are spaced apart in the vibration direction of the magnetic circuit component, and two projections of the two vibration transmission plates along the vibration direction are symmetrical.

2. The loudspeaker according to claim 1, characterized in that The two vibration transmission plates include a first vibration transmission plate, the first vibration transmission plate includes a central area, an edge area and a connecting rod connecting the central area and the edge area, the connecting rod includes a first part connecting the central area, a second part connecting the edge area, and a third part located between the first part and the second part, and the width of the first part and the second part is greater than the width of the third part.

3. The loudspeaker according to claim 2, characterized in that The number of the connecting rods is two, and the two connecting rods are symmetrical about the center of the first vibration transmission plate.

4. The loudspeaker according to claim 2, characterized in that The thickness of the connecting rod is in the range of 0.1 mm to 0.15 mm.

5. The loudspeaker according to claim 2, characterized in that The third portion of the connecting rod has a width ranging from 0.2 mm to 0.66 mm.

6. The loudspeaker according to any one of claims 2 to 5, characterized in that: The two vibration transmission plates further include a second vibration transmission plate, the first vibration transmission plate and the second vibration transmission plate have a long axis direction and a short axis direction, and the first vibration transmission plate and the second vibration transmission plate satisfy at least one of the following conditions: the equivalent stiffness of the first vibration transmission plate and the second vibration transmission plate along the long axis direction is in the range of 7500N / m-12500N / m; The equivalent stiffness of the first vibration transmission piece and the second vibration transmission piece along the short axis direction is in the range of 15000N / m-25000N / m; The equivalent stiffness of the first vibration transmission piece and the second vibration transmission piece along the vibration direction is in the range of 1200N / m-2000N / m; The equivalent stiffness of the first vibration transmission piece and the second vibration transmission piece flipped around the long axis direction is in the range of 0.05-0.15N*m / rad; The equivalent flipping stiffness of the first vibration transmission plate and the second vibration transmission plate flipping around the short axis direction is in the range of 0.1-0.2N*m / rad.

7. The loudspeaker according to claim 1, characterized in that The two projections of the two vibration transmission plates are symmetrical about the short axis direction, symmetrical about the long axis direction or centrally symmetrical.

8. The loudspeaker according to claim 1, characterized in that The magnetic circuit assembly includes a first magnet, a magnetic conductive plate, a second magnet and a magnetic conductive cover arranged in sequence along the vibration direction, and the vibration transmission plate includes a first vibration transmission plate and a second vibration transmission plate, the first vibration transmission plate is located on the side of the first magnet away from the magnetic conductive plate, and the second vibration transmission plate is located on the side of the magnetic conductive cover away from the second magnet.

9. The loudspeaker according to claim 8, characterized in that Along the vibration direction, the distance between the two opposite side surfaces of the first magnet and the first vibration transmission plate is not less than 0.9 mm, and the distance between the two opposite side surfaces of the magnetic conductive cover and the second vibration transmission plate is not less than 0.9 mm.

10. The loudspeaker according to claim 7 or 8, characterized in that: The magnetic circuit component drives the positioning component to vibrate, and the resonance peak frequency generated by the positioning component does not exceed 300 Hz.

11. The loudspeaker according to claim 2, characterized in that The vibration transmission piece further includes a second vibration transmission piece, and the support portion includes a shell and a first bracket and a second bracket respectively used to connect the first vibration transmission piece and the second vibration transmission piece to the shell; The edge area of ​​the first vibration transmission sheet is fixed on the first bracket, and the coil of the speaker is fixed on the first bracket; The edge area of ​​the second vibration transmission plate is fixed on the second bracket.

12. The loudspeaker according to claim 11, characterized in that The Young's modulus of the second vibration transmission piece is greater than the Young's modulus of the first vibration transmission piece.

13. The loudspeaker according to claim 2, characterized in that The edge area of ​​the first vibration transmission plate is annular, and the two vibration transmission plates meet at least one of the following conditions: The equivalent stiffness of the two vibration transmission plates in the extension direction of the connecting rod is in the range of 10000N / m-20000N / m; The equivalent stiffness of the two vibration transmission plates in the vibration direction is in the range of 1200N / m-2000N / m; The equivalent flipping of the two vibration transmission plates around the extension direction of the connecting rod is in the range of 0.1N*m / rad-0.15N*m / rad.

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