CN220422036U - Loudspeaker - Google Patents

Loudspeaker Download PDF

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Publication number
CN220422036U
CN220422036U CN202321871587.4U CN202321871587U CN220422036U CN 220422036 U CN220422036 U CN 220422036U CN 202321871587 U CN202321871587 U CN 202321871587U CN 220422036 U CN220422036 U CN 220422036U
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China
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vibration
transmitting
sheet
transmitting sheet
sheets
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CN202321871587.4U
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崔超杰
柯浩
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Shenzhen Voxtech Co Ltd
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Shenzhen Voxtech Co Ltd
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Priority to CN202321871587.4U priority Critical patent/CN220422036U/en
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Abstract

The embodiment of the specification provides a loudspeaker, which comprises a supporting part, a magnetic circuit assembly and a positioning assembly, wherein 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 sheets, the two vibration transmission sheets are distributed at intervals in the vibration direction of the magnetic circuit assembly, and the two vibration transmission sheets have symmetry along two projections of the vibration direction. According to the loudspeaker provided by the embodiment of the specification, the vibration transmission sheets are respectively arranged on the two sides of the vibration direction of the magnetic circuit assembly, the vibration direction of the magnetic circuit assembly is restrained by the vibration transmission sheets on the two sides, so that on one hand, the vibration of the magnetic circuit assembly during vibration can be reduced, and on the other hand, the amplitude of the vibration transmission sheets turned around the long axis direction or the short axis direction of the magnetic circuit assembly is reduced through the arrangement of the double vibration transmission sheets, so that the time for breaking and damaging the vibration transmission sheets is greatly prolonged, and the service life of the vibration transmission sheets is ensured.

Description

Loudspeaker
Technical Field
The present disclosure relates to the field of acoustic output devices, and in particular, to a speaker.
Background
The vibration transmitting sheet is used as an important component in the bone conduction speaker, and can transmit the vibration generated by the bone conduction vibrator in the bone conduction speaker to the shell, and then transmit the vibration to the auditory nerve of the person through the skin, subcutaneous tissue and bones of the person, so that the person can hear the sound. In general, when a bone conduction oscillator of a bone conduction speaker vibrates, the bone conduction oscillator easily deviates from the vibration direction, and may collide with a shell or a coil, and meanwhile, a vibration transmitting sheet is more easily broken under the influence of the vibration of the bone conduction oscillator deviating from the vibration direction.
Therefore, there is a need for a speaker with improved structural reliability.
Disclosure of Invention
One of the embodiments of the present specification provides a speaker including: the magnetic circuit assembly is connected with the supporting part through the positioning assembly and vibrates relative to the supporting part; the positioning assembly comprises two vibration transmission sheets, the two vibration transmission sheets are distributed at intervals in the vibration direction of the magnetic circuit assembly, and the two vibration transmission sheets have symmetry along two projections of the vibration direction. According to the embodiment of the specification, the vibration transmission sheets are respectively arranged on the two sides of the vibration direction of the magnetic circuit assembly, the vibration direction of the magnetic circuit assembly is restrained by the vibration transmission sheets on the two sides, so that on one hand, the shaking of the magnetic circuit assembly during vibration can be reduced, and on the other hand, the amplitude of the turnover of the vibration transmission sheets around the long axis direction or the short axis direction of the magnetic circuit assembly is reduced through the arrangement of the double vibration transmission sheets, so that the time for breaking and damaging the vibration transmission sheets is greatly prolonged, and the service life of the vibration transmission sheets is guaranteed.
In some embodiments, the two vibration-transmitting sheets include a first vibration-transmitting sheet including a center region, an edge region, and a connecting rod connecting the center region and the edge region, the connecting rod including a first portion connecting the center region, a second portion connecting the edge region, and a third portion located between the first portion and the second portion, the first portion and the second portion having a width greater than a width of the third portion. By making the widths of the first and second portions larger than the width of the third portion, the rigidity coefficients of the first and second portions of the connecting rod can be improved, thereby enhancing the structural strength between the connecting rod and the central and edge regions.
In some embodiments, the number of connecting rods is two, the two connecting rods being symmetrical about the center of the first vibration-transmitting plate. The second connecting rods are symmetrical about the geometric center of the first vibration transmission piece, so that the stress of the vibration transmission piece in the working state is balanced, the vibration transmission piece is prevented from being unbalanced and overturned, and the fatigue resistance of the vibration transmission piece during overturned is improved.
In some embodiments, the thickness of the connecting rod ranges from 0.1mm to 0.15mm. By adjusting the thickness dimension of the connecting rod, the rigidity coefficient of the connecting rod can be increased, so that the rigidity of the vibration transmission sheet in each direction meets the limit range.
In some embodiments, the third portion of the connecting rod has a width in the range of 0.2mm to 0.66mm. By adjusting the width dimension of the connecting rod, the rigidity coefficient of the connecting rod can be increased, so that the rigidity of the vibration transmission sheet in each direction meets the limit range.
In some embodiments, the two vibration-transmitting sheets further comprise a second vibration-transmitting sheet, the first vibration-transmitting sheet and the second vibration-transmitting sheet having a major axis direction and a minor axis direction, the first vibration-transmitting sheet and the second vibration-transmitting sheet satisfying at least one of the following conditions: equivalent rigidity of the first vibration transmission sheet and the second vibration transmission sheet along the long axis direction is in the range of 7500N/m-12500N/m so as to ensure fatigue resistance of the first vibration transmission sheet and the second vibration transmission sheet along the long axis direction and prevent the two vibration transmission sheets from cracking or breaking along the long axis direction; the equivalent rigidity of the first vibration transmission sheet and the second vibration transmission sheet 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 sheet and the second vibration transmission sheet along the short axis direction and prevent the first vibration transmission sheet and the second vibration transmission sheet from cracking or breaking along the short axis direction; the equivalent rigidity of the first vibration transmission sheet and the second vibration transmission sheet along the vibration direction is in the range of 1200N/m-2000N/m, so that the fatigue resistance of the first vibration transmission sheet and the second vibration transmission sheet in the vertical axis direction is ensured, and the first vibration transmission sheet or the second vibration transmission sheet is prevented from cracking or breaking in the vertical axis direction; the equivalent rigidity of the first vibration transmission sheet and the second vibration transmission sheet which are turned around the long axis direction is in the range of 0.05-0.15N m/rad, so that the fatigue resistance of the first vibration transmission sheet and the second vibration transmission sheet which are turned around the long axis direction is ensured, and the first vibration transmission sheet or the second vibration transmission sheet is prevented from cracking or breaking when being turned around the long axis direction; the equivalent overturning rigidity of the first vibration transmission sheet and the second vibration transmission sheet overturning around the short axis direction is in the range of 0.1-0.2N m/rad, so that the fatigue resistance of the first vibration transmission sheet overturning around the short axis direction is ensured, and the first vibration transmission sheet is prevented from cracking or breaking when overturning around the short axis direction.
In some embodiments, the two projections of the two vibration-transmitting sheets are symmetrical about the short axis direction, symmetrical about the long axis direction, or centrosymmetric, which can correspondingly improve the fatigue resistance of the speaker in each direction.
In some embodiments, the magnetic circuit assembly includes a first magnet, a magnetic conductive plate, a second magnet, and a magnetic conductive cover sequentially disposed along a vibration direction, the vibration transmitting sheet includes a first vibration transmitting sheet and a second vibration transmitting sheet, the first vibration transmitting sheet is located at a side of the first magnet facing away from the magnetic conductive plate, and the second vibration transmitting sheet is located at a side of the magnetic conductive cover facing away from the second magnet.
In some embodiments, a distance between two sides of the first magnet opposite to the first vibration transmitting piece along the vibration direction is not less than 0.9mm, and a distance between two sides of the magnetic conductive cover opposite to the second vibration transmitting piece is not less than 0.9mm. The collision of the magnetic circuit assembly and the vibration transmission sheet in the vibration direction can be avoided, so that the influence on the acoustic performance of the loudspeaker and the service life of the vibration transmission sheet are avoided.
In some embodiments, the magnetic circuit assembly drives the positioning assembly to vibrate, the resonance peak frequency generated by the positioning assembly is not more than 300Hz, the frequency response of the loudspeaker at low frequency can be improved, meanwhile, the frequency response curve of the loudspeaker in a wider frequency band can be flatter, and the signal-to-noise ratio of the loudspeaker in a specific frequency band can be improved.
In some embodiments, the vibration-transmitting sheet further includes a second vibration-transmitting sheet, the support portion including a housing, and first and second brackets for connecting the first and second vibration-transmitting sheets to the housing, respectively; the edge area of the first vibration transmission sheet is fixed on the first bracket, and the coil of the loudspeaker is fixed on the first bracket; the edge area of the second vibration transmission sheet is fixed on the second bracket.
In some embodiments, the young modulus of the second vibration-transmitting piece is greater than that of the first vibration-transmitting piece, so that the hardness of the second vibration-transmitting piece close to the bottom of the magnetic circuit assembly is greater than that of the first vibration-transmitting piece far away from the bottom of the magnetic circuit assembly, and the second vibration-transmitting piece can adapt to larger-amplitude shaking of the magnetic circuit assembly close to the bottom area of the magnetic circuit assembly, thereby being beneficial to reducing shaking of the magnetic circuit assembly in the vibration direction and preventing the magnetic circuit assembly from inclining.
In some embodiments, the edge region of the first vibration-transmitting sheet is annular, and the two vibration-transmitting sheets satisfy at least one of the following conditions:
the equivalent rigidity of the two vibration transmission sheets in the extending direction of the connecting rod is in the range of 10000N/m-20000N/m, so that the fatigue resistance of the first vibration transmission sheet and the second vibration transmission sheet along the extending direction of the connecting rod is ensured, and the first vibration transmission sheet or the second vibration transmission sheet is prevented from cracking or breaking in the extending direction of the connecting rod;
The equivalent rigidity of the two vibration transmission sheets in the vibration direction is in the range of 1200N/m-2000N/m, so that the fatigue resistance of the first vibration transmission sheet and the second vibration transmission sheet in the vertical axis direction is ensured, and the first vibration transmission sheet or the second vibration transmission sheet is prevented from cracking or breaking in the vertical axis direction.
The equivalent overturning of the two vibration transmission sheets around the extending direction of the connecting rod is within the range of 0.1N m/rad-0.15N m/rad so as to ensure the fatigue resistance of the first vibration transmission sheet and the second vibration transmission sheet around the extending direction of the connecting rod and prevent the first vibration transmission sheet or the second vibration transmission sheet from cracking or breaking when overturning around the extending direction of the connecting rod.
Drawings
The present specification will be further elucidated by way of example embodiments, which will be described in detail by means of the accompanying drawings. The embodiments are not limiting, in which like numerals represent like structures, wherein:
fig. 1 is a schematic diagram of a frame of a speaker shown in accordance with some embodiments of the present description;
fig. 2 is a schematic diagram of a speaker according to some embodiments of the present description;
FIG. 3 is a schematic diagram of four distributions of vibration-transmitting sheets according to some embodiments of the present disclosure;
FIG. 4 is a schematic structural view of a first vibration-transmitting sheet according to some embodiments of the present disclosure;
FIG. 5A is a schematic structural view of a first vibration-transmitting sheet according to some embodiments of the present disclosure;
FIG. 5B is a schematic structural view of a first vibration-transmitting sheet according to some embodiments of the present disclosure;
FIG. 6A is a schematic structural view of a first vibration-transmitting sheet according to some embodiments of the present disclosure;
FIG. 6B is a schematic structural view of a first vibration-transmitting sheet according to some embodiments of the present disclosure;
FIG. 6C is a schematic structural view of a first vibration-transmitting sheet according to some embodiments of the present disclosure;
FIG. 6D is a schematic structural view of a first vibration-transmitting sheet according to some embodiments of the present disclosure;
fig. 7 is a graph of the frequency response of a speaker employing the vibration-transmitting sheets shown in fig. 6B to 6D, respectively;
FIG. 8 is a schematic representation of three distributions of vibration-transmitting sheets according to some embodiments of the present disclosure;
FIG. 9 is a schematic illustration of three distributions of vibration-transmitting sheets according to some embodiments of the present disclosure;
FIG. 10A is a schematic structural view of a vibration-transmitting sheet according to some embodiments of the present disclosure;
fig. 10B is a schematic structural view of another vibration-transmitting sheet according to some embodiments of the present disclosure.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
In order to more clearly illustrate the technical solutions of the embodiments of the present specification, the drawings used in the description of the embodiments will be briefly described below. It is apparent that the drawings in the following description are only some examples or embodiments of the present specification, and it is possible for those of ordinary skill in the art to apply the present specification to other similar situations according to the drawings without inventive effort. It should be understood that these exemplary embodiments are presented merely to enable one skilled in the relevant art to better understand and practice the present description, and are not intended to limit the scope of the present description in any way. Unless otherwise apparent from the context of the language or otherwise specified, like reference numerals in the figures refer to like structures or operations.
As used in this specification and the claims, the terms "a," "an," "the," and/or "the" are not specific to a singular, but may include a plurality, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that the steps and elements are explicitly identified, and they do not constitute an exclusive list, as other steps or elements may be included in a method or apparatus. The term "based on" is based at least in part on. The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment".
In the description of the present specification, it should be understood that the azimuth or positional relationship indicated by the terms "front", "rear", "ear-hanging", "rear-hanging", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description of the present specification and simplification of the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present specification.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present specification, the meaning of "plurality" means at least two, for example, two, three, etc., unless explicitly defined otherwise.
In this specification, unless clearly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in this specification will be understood by those of ordinary skill in the art in view of the specific circumstances.
The embodiment of the specification provides a loudspeaker, which comprises a supporting part, a magnetic circuit component and a positioning component, wherein the magnetic circuit component is connected with the supporting part through the positioning component, the positioning component comprises a first vibration transmission sheet and a second vibration transmission sheet, the first vibration transmission sheets and the second vibration transmission sheets are distributed at intervals in the vibration direction of the magnetic circuit assembly, and symmetry exists between two projections of the first vibration transmission sheets and the second vibration transmission sheets along the vibration direction. When the magnetic circuit assembly vibrates relative to the supporting part, the first vibration transmitting piece and the second vibration transmitting piece transmit vibration to the supporting part, and then the vibration is transmitted to auditory nerves of a user through skin, subcutaneous tissue and bones of the user, so that the user can hear the sound. If the single vibration transmitting plate structure is adopted, the magnetic circuit assembly easily generates vibration deviating from the vibration direction when vibrating, and the magnetic circuit assembly possibly collides with other parts (such as a shell or a coil and the like) of the loudspeaker; meanwhile, when the magnetic circuit assembly vibrates in a direction deviating from the vibration direction, the vibration transmission sheet is turned over under the influence of the vibration, and when the vibration transmission sheet is in a shape with a long axis direction and a short axis direction, for example, when the vibration transmission sheet is in a runway-shaped structure, the vibration transmission sheet can turn over around the long axis direction and the short axis direction, so that the vibration transmission sheet is easy to break. According to the loudspeaker provided by the embodiment of the specification, the vibration transmission sheets are respectively arranged on the two sides of the vibration direction of the magnetic circuit assembly, the vibration direction of the magnetic circuit assembly is restrained by the vibration transmission sheets on the two sides, so that on one hand, the vibration of the magnetic circuit assembly during vibration can be reduced, and on the other hand, the amplitude of the vibration transmission sheets turned around the long axis direction or the short axis direction of the magnetic circuit assembly is reduced through the arrangement of the double vibration transmission sheets, so that the time for breaking and damaging the vibration transmission sheets is greatly prolonged, and the service life of the vibration transmission sheets is ensured.
Fig. 1 is a schematic diagram of a frame of a speaker according to some embodiments of the present description.
As shown in fig. 1, the speaker 100 includes a magnetic circuit assembly 110, a positioning assembly 120, and a supporting portion 130, wherein the magnetic circuit assembly 110 is connected to the supporting portion 130 through the positioning assembly 120, and the supporting portion 130 is used for carrying other elements such as the magnetic circuit assembly 110, the positioning assembly 120, and the like in the speaker 100.
In some embodiments, the magnetic circuit assembly 110 is connected to the support 130 through the positioning assembly 120, and the positioning assembly 120 may include at least one vibration-transmitting piece. The magnetic circuit assembly 110 may generate mechanical vibration in a vibration direction in response to an electrical signal, the mechanical vibration generated by the magnetic circuit assembly 110 is transferred to the positioning assembly, and the mechanical vibration is transferred to the support 130 (e.g., the housing) via the positioning assembly 120, and when the speaker 100 is worn by a user, a portion of the structure (e.g., one side of the housing or the vibration panel) of the support 130 is in contact with the skin of the user, and the support 130 applies the mechanical vibration to the acoustic nerve of the user through the skin, bone, and/or tissue of the user, thereby enabling the user to hear the sound.
Fig. 2 is a schematic structural diagram of a speaker provided according to some embodiments of the present description. Referring to fig. 1 and 2, in some embodiments, the support 130 may include a housing 131, and a receiving cavity may be formed in the housing 131 for receiving the magnetic circuit assembly 110 and the positioning assembly 120. In some embodiments, positioning assembly 120 may connect housing 131 and magnetic circuit assembly 110 simultaneously to suspend magnetic circuit assembly 110 within the receiving cavity of housing 131. When the user wears the speaker 100, a side wall of the case 131 (for example, a vibration panel of the case facing the face) is in contact with the human body, and mechanical vibration generated by the magnetic circuit assembly 110 is transmitted to the case 131 and transmitted to the user via the side wall of the case 131 in contact with the human body, thereby realizing conduction of bone conduction sound waves. In some embodiments, the support 130 may include a housing 131 and a vibration panel (not shown in fig. 2), the magnetic circuit assembly 110 and the positioning assembly 120 being disposed within a receiving cavity of the housing 131, the vibration panel being connected to the positioning assembly 120. When the user wears the speaker 100, the vibration panel is in contact with the human body, and mechanical vibration generated by the magnetic circuit assembly 110 is transmitted to the vibration panel, and is transmitted to the user via the vibration panel in contact with the human body, so that bone conduction sound waves are conducted. It should be appreciated that the housing 131 may be a cuboid, cylinder, bench-shaped decoupling strand, or the like, or any irregular shape, and combinations thereof, and is not limited to the shape shown in the figures.
In some embodiments, the positioning assembly 120 may include two vibration-transmitting sheets (the first vibration-transmitting sheet 121 and the second vibration-transmitting sheet 122 shown in fig. 2), the two vibration-transmitting sheets are spaced apart in the vibration direction of the magnetic circuit assembly 110, the two vibration-transmitting sheets are located on two opposite sides of the magnetic circuit assembly 110 along the vibration direction, and the two vibration-transmitting sheets are symmetrically distributed between two projections along the vibration direction, that is, have symmetry, and two sides of the magnetic circuit assembly 110 along the vibration direction are connected with the supporting portion 130 through the vibration-transmitting sheets.
Because the two vibration transmission sheets are arranged in a separated mode along the vibration direction and are not in the same plane, for convenience of description, a description mode that two projections of the two vibration transmission sheets along the vibration direction are symmetrically distributed is adopted, and a distribution mode of the two vibration transmission sheets is correspondingly described in practice. In some embodiments, the vibration-transmitting sheet may be racetrack-shaped, rectangular, oval, circular, diamond-shaped, or polygonal, etc., or any irregular shape and combinations thereof. In order to more clearly describe the manner in which the two projections of the two vibration-transmitting sheets along the vibration direction are symmetrically distributed, the vibration-transmitting sheets are described herein as being racetrack-shaped as an example, and when the vibration-transmitting sheets are racetrack-shaped, they have a long-axis direction and a short-axis direction. In some embodiments, the two projections of the two vibration-transmitting sheets along the vibration direction are symmetrically distributed, which may include that the two projections are symmetrical along the long axis, where the two projections are symmetrical about the long axis, and the two projections of the two vibration-transmitting sheets coincide after one of the two vibration-transmitting sheets is turned 180 ° along the long axis. In some embodiments, the two projections of the two vibration-transmitting sheets along the vibration direction are symmetrically distributed, which may include that the two projections are symmetrical about a short axis, where the symmetry of the two projections along the short axis may be understood as that the two projections of the two vibration-transmitting sheets coincide in the vibration direction after one of the two vibration-transmitting sheets is turned 180 ° along the short axis. In some embodiments, the two projections of the two vibration-transmitting sheets along the vibration direction are symmetrically distributed, which may include two projection centers that are symmetrical, where the two projection centers are understood to be two projections of the two vibration-transmitting sheets in the vibration direction after one of the two vibration-transmitting sheets is turned 180 ° along the major axis and the minor axis, respectively. Taking the vibration-transmitting sheet as an example, the vibration-transmitting sheet has a first radial direction and a second radial direction perpendicular to the first radial direction, and two projections of the two vibration-transmitting sheets along the vibration direction may be symmetrically distributed along the first radial direction, symmetrically distributed along the second radial direction, or symmetrically distributed in the center. For convenience of description, the vibration-transmitting sheet is exemplified as a racetrack shape.
Fig. 3 is a schematic diagram of four distributions of vibration-transmitting sheets according to some embodiments of the present description. As shown in fig. 3, the vibration-transmitting sheet has a racetrack shape, and has a long axis direction (i.e., X direction shown in fig. 3) and a short axis direction (i.e., Y direction shown in fig. 3). The two vibration-transmitting sheets shown in region a in fig. 3 coincide in two projections along the vibration direction. The two vibration-transmitting sheets shown in region b in fig. 3 are symmetrical along their long axis directions in two projections along the vibration direction. The two vibration-transmitting sheets shown in the region c in fig. 3 are symmetrical along the two projected centers of the vibration direction, where the center refers to the geometric center of the peripheral side profile shape of the vibration-transmitting sheet. The two vibration-transmitting sheets shown in the region d in fig. 3 are symmetrical along the short axis direction thereof in two projections along the vibration direction.
In order to compare the service lives of the vibration transmitting plates in the four dual vibration transmitting plate distribution modes shown in fig. 3, fatigue resistance performance detection experiments were performed on the speakers provided with the vibration transmitting plates alone and the speakers adopting the four dual vibration transmitting plate distribution modes shown in fig. 3. Fatigue refers to the whole process of fracture failure caused by crack initiation and propagation due to the fact that vibration-transmitting sheets bear variable loads during operation. In the experiment, the fatigue resistance of the vibration transmission sheet is represented by the failure cycle times. The number of failure cycles can be measured by a roller test, for example, by applying a load to the long axis direction, the short axis direction or the vertical axis direction (the direction perpendicular to the long axis and the short axis) of the vibration-transmitting sheet by a fatigue tester. And applying a certain load to the vibration transmission sheets which are arranged independently and the double vibration transmission sheets which are arranged in the distribution mode in the long axis direction, the short axis direction or the vertical axis direction, and measuring the corresponding failure cycle times, wherein the specific results are shown in the table 1. Wherein, the larger the failure cycle number is, the better the fatigue resistance is, and the longer the service life is. The failure cycle times measured in table 1 were obtained based on the cycle times at which the single vibration-transmitting sheet was broken or at which the first of the two vibration-transmitting sheets was broken.
TABLE 1
As is clear from table 1, the fatigue resistance of the two vibration transmitting sheets (the distribution pattern a in fig. 3) superimposed along the projection in the vibration direction was far greater in the major axis direction, the minor axis direction, and the vertical axis direction than in the vibration transmitting sheets individually provided. From the structural point of view, both sides of the magnetic circuit assembly 110 along the vibration direction are limited by the vibration transmitting sheets, which is favorable for reducing the shaking of the magnetic circuit assembly 110 deviating from the vibration direction during vibration, thereby preventing the magnetic circuit assembly 110 from colliding with the supporting part, the coil and other structures of the loudspeaker 100 during vibration and ensuring the acoustic output effect of the loudspeaker 100. Further, the fatigue resistance of the two vibration transmitting sheets symmetrical along the projection in the vibration direction along the long axis direction thereof, the two vibration transmitting sheets symmetrical along the projection in the vibration direction along the short axis direction thereof, and the two vibration transmitting sheets symmetrical along the projection center in the vibration direction thereof are all significantly better than those of the vibration transmitting sheets individually arranged. From the aspect of the integral fatigue resistance of the vibration transmission sheets, the fatigue resistance in the long axis direction is slightly worse than the fatigue resistance in the short axis direction and the vertical axis direction, and the fatigue resistance in the long axis direction can be emphasized by selecting the distribution mode of the two vibration transmission sheets so that the vibration transmission sheets do not crack or break in the long axis direction. The two vibration transmitting sheets (d distribution mode in fig. 3) which are symmetrical along the short axis direction of the projection along the vibration direction have fatigue resistance performance in the long axis direction superior to that of the vibration transmitting sheets which are arranged independently and the two vibration transmitting sheets which are overlapped along the projection along the vibration direction, symmetrical along the long axis direction and centrosymmetric. Thus, in some embodiments, to further improve fatigue resistance of the vibration-transmitting sheet in the long axis direction, ensuring that the vibration-transmitting sheet has a longer service life, two projections of the two vibration-transmitting sheets along the vibration direction may be symmetrical in the short axis direction thereof.
It should be appreciated that the two vibration-transmitting sheets included in the speaker 100 are not limited to a symmetrical distribution of projections along the vibration direction, and in some embodiments, the two vibration-transmitting sheets may be two vibration-transmitting sheets having different body shapes. For example, one vibration-transmitting sheet has a circular structure, and the other vibration-transmitting sheet has a racetrack-shaped structure. In some embodiments, the two vibration-transmitting sheets may be two vibration-transmitting sheets having the same shape as the main body and different internal structures. For example, one vibration-transmitting sheet is of a three-connecting-rod structure shown in fig. 4, and the other vibration-transmitting sheet is of a four-connecting-rod structure shown in fig. 5A to 5B or of a two-connecting-rod structure shown in fig. 6A to 6D. For another example, the shape (e.g., the shape of the bent portion) of the connecting rod of the two vibration-transmitting pieces is different. For another example, the width dimensions of the connecting rods of the two vibration-transmitting sheets are different, and the width dimensions refer to dimensions perpendicular to the extending direction of the connecting rods (see a dimension shown in fig. 4). For a specific description of the structure of the vibration-transmitting sheet, reference may be made to fig. 4 to 6D and their associated description.
In some embodiments, the two vibration-transmitting sheets may include a first vibration-transmitting sheet. Fig. 4 is a schematic structural view of a first vibration-transmitting sheet according to some embodiments of the present description. As shown in fig. 4, the first vibration-transmitting sheet 321 includes a central region 3211 and edge regions 3212, the edge regions 3212 are distributed on the circumferential side of the central region 3211, that is, the edge regions 3212 are disposed around the central region 3211, and the central region 3211 is connected to the edge regions 3212 by connecting rods (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 region 3211, and the other end of the connecting rod is connected to the inner edge of the edge region 3212. When the magnetic circuit assembly 110 is connected to the support portion 130 through the first vibration transmitting piece 321, the magnetic circuit assembly 110 is connected to the central region 3211, and the edge region 3212 is connected to and fixed to the support portion 130.
In some embodiments, the edge region 3212 of the first vibration-transmitting sheet 321 may be an annular structure. In some embodiments, the shape (outer contour shape) of the edge region 3212 may be a racetrack shape as shown in fig. 4, or may be a regular shape or an irregular shape such as a circle, an ellipse, a triangle, a quadrangle, a pentagon, a hexagon, or the like. The vibration-transmitting sheet having a racetrack shape may be understood as a ring-shaped structure in which the edge region 3212 of the vibration-transmitting sheet has a racetrack shape. In some embodiments, the inner contour shape and the outer contour shape of the edge region 3212 may be the same shape. For example, the outer contour shape of the edge region 3212 is racetrack-shaped, and the inner contour shape of the edge region 3212 is racetrack-shaped. In some embodiments, the inner contour shape and the outer contour shape of the edge region 3212 may be different shapes. For example, the outer contour shape of the edge region 3212 may be racetrack-shaped, while the inner contour shape of the edge region 3212 may be circular, rectangular, or the like.
In some embodiments, the central region 3211 is located within the hollowed-out region of the edge region 3212, and the central region 3211 may be symmetrical along a minor axis and symmetrical along a major axis as shown in fig. 4. In some embodiments, the region between the central region 3211 and the edge regions 3212 may also be symmetrical in shape along the minor axis and symmetrical along the major axis as shown in fig. 4. In some embodiments, the shape of the central region 3211 may be circular, triangular, quadrilateral, pentagonal, hexagonal, or other regular or irregular shape. In some embodiments, the shape of the central region 3211 may be the same as the shape of the edge region 3212. For example, the shape of the edge region 3212 and the center region 3211 may each be circular, i.e., the edge region 3212 and the center region 3211 may form concentric circles. In some embodiments, the magnetic circuit assembly 110 may be coupled to one of the surfaces of the central region 3211 by means including, but not limited to, gluing, welding, clamping, pinning, bolting, or the like.
In some embodiments, the connecting rod is located between the edge region 3212 and the central region 3211, when the vibration-transmitting sheet is in an operating state, the vibration of the magnetic circuit assembly 110 may drive a part of the structure (for example, the central region 3211) of the vibration-transmitting sheet to vibrate along a direction perpendicular to the plane of the vibration-transmitting sheet (i.e., a direction perpendicular to the page in fig. 3), so that the vibration generated by the magnetic circuit assembly 110 can be transmitted to the supporting portion 130 through the vibration-transmitting sheet, and the vibration of the supporting portion 130 is transmitted to the auditory nerve of the user through the bone, blood, muscle, etc. of the head of the user, so that the user can hear the sound.
In some embodiments, the number of tie bars may be multiple for achieving a connection between the edge region 3212 and the center region 3211. In some embodiments, the number of the connecting rods may be 2-5, so that stability of the first vibration transmitting piece 321 in the working process may be ensured, so that the magnetic circuit assembly 110 is not easy to deflect when vibrating along the vibration direction, and the reliability is stronger. The deflection refers to that when the magnetic circuit assembly 110 vibrates, the actual vibration direction of the magnetic circuit assembly 110 is inconsistent with the vibration direction shown in fig. 2, for example, an included angle is formed between the actual vibration direction and the vibration direction shown in fig. 2, so that a situation that a plane where the edge region 3212 is located is not parallel to a plane where the center region 3211 is located, that is, an abnormal state that an included angle exists between the two planes exists, and the state can cause the magnetic circuit assembly 110 to collide with other elements of the loudspeaker 100, so that the acoustic output effect is affected; on the other hand, the vibration transmission sheet can turn around the long axis direction and the short axis direction, so that the connecting rod is easy to break, and the service life of the vibration transmission sheet is influenced.
In some embodiments, as shown in fig. 4, 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 bar 3213, the second connecting bar 3214 and the third connecting bar 3215 are connected between an outer edge of the central region 3211 and an inner edge of the edge region 3212. In some embodiments, the first connecting rod 3213, the second connecting rod 3214, and the third connecting rod 3215 are spaced apart along the circumference of the central region 3211. In some embodiments, the connecting rod may employ a serpentine bending structure comprising a plurality of bending structures (e.g., bending structures M and N shown in dashed boxes in fig. 4), the bending structures being curved in shape so that the connecting rod has a predetermined spring rate. Specifically, the first connecting rod 3213 has 2 bending structures, which are continuous two-bending shapes, the second connecting rod 3214 has 4 bending structures, which are continuous four-bending shapes, and the third connecting rod 3215 has 3 bending structures, which are continuous three-bending shapes. The bending structure can reduce the elastic coefficient of the connecting rod in a specific direction (such as a long axis direction) to strengthen the toughness of the connecting rod and increase the deformability of the vibration transmission sheet, so that the impact of the load on the connecting rod in the specific direction is effectively reduced, and the service life of the first vibration transmission sheet 321 is prolonged.
In some embodiments, the first connecting rod 3213, the second connecting rod 3214, and the third connecting rod 3215 may exhibit an asymmetric distribution. The asymmetric distribution herein means that the first connecting rod 3213, the second connecting rod 3214, and the third connecting rod 3215 are not symmetrically distributed along the center line in the long axis direction of the vibration transmitting sheet, but are not symmetrically distributed along the center line in the short axis direction of the vibration transmitting sheet.
Specifically, referring to fig. 4, the bending structures of the first connecting rod 3213, the second connecting rod 3214, and the third connecting rod 3215 are different in shape and degree of bending, and the pitches of two adjacent connecting rods in the circumferential direction of the central region 3211 are also different. Through the asymmetric distribution of the three connecting rods, the problem that the magnetic circuit assembly 110 connected with the central region 3211 collides in the shell 131 and generates abnormal sound when shaking can be effectively solved.
It should be noted that the number of connecting rods in fig. 4 is only for exemplary description, and is not limited thereto. In some embodiments, the number of the connecting rods in the first vibration-transmitting sheet 321 may also be two or more, for example, the vibration-transmitting sheet may further include a fourth connecting rod and/or a fifth connecting rod, etc.
Fig. 5A is a schematic structural view of a first vibration-transmitting sheet according to some embodiments of the present disclosure. Fig. 5B is a schematic structural view of a first vibration-transmitting sheet according to some embodiments of the present disclosure. Fig. 5A and 5B illustrate two embodiments in which the first vibration transmitting plate 421 includes 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, second, third, and fourth connecting rods 4213, 4214, 4215, 4216 may employ a bent structure as shown in fig. 5A and 5B. Specifically, as shown in fig. 5A, the first connecting rod 4213 has 3 bending structures, the second connecting rod 4214 has 4 bending structures, the third connecting rod 4215 has 3 bending structures, and the fourth connecting rod 4216 has 4 bending structures. As shown in fig. 5B, the first connecting rod 4213 has 3 bending structures, the second connecting rod 4214 has 2 bending structures, the third connecting rod 4215 has 3 bending structures, and the fourth connecting rod 4216 has 2 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 center-symmetrical with respect to the first vibration transmitting plate 421, the second connecting rod 4214 and the third connecting rod 4215 are center-symmetrical with respect to the first vibration transmitting plate 421, and the distances between adjacent two connecting rods in the circumferential direction of the central region 4211 are the same or approximately the same. Through the symmetrical distribution of the four connecting rods, the stress of the vibration transmission sheet in the working state is balanced, the vibration transmission sheet is prevented from being unbalanced and turned over, and the fatigue resistance of the vibration transmission sheet is improved.
Fig. 6A is a schematic structural view of a first vibration-transmitting sheet according to some embodiments of the present disclosure. Fig. 6B is a schematic structural view of a first vibration-transmitting sheet according to some embodiments of the present disclosure. Fig. 6C is a schematic structural view of a first vibration-transmitting sheet according to some embodiments of the present disclosure. Fig. 6D is a schematic structural view of a first vibration-transmitting sheet according to some embodiments of the present disclosure. Fig. 6A-6D illustrate various embodiments in which the first vibration transmitting plate 521 includes a first connecting rod 5213 and a second connecting rod 5214. In some embodiments, first connecting rod 5213 and second connecting rod 5214 can employ the bent structures shown in fig. 5A-6D. Specifically, as shown in fig. 6A, the first connection rod 5213 has 2 bending structures, and the second connection rod 5214 has 2 bending structures. As shown in fig. 6B, the first connecting rod 5213 has 3 bending structures, and the second connecting rod 5214 has 3 bending structures. As shown in fig. 6C, the first connecting rod 5213 has 3 bending structures, and the second connecting rod 5214 has 3 bending structures. As shown in fig. 6D, the first connecting rod 5213 has 2 bending structures, and the second connecting rod 5214 has 2 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 transmitting plate 521. Through the distribution mode of symmetry of the first connecting rod 5213 and the second connecting rod 5214 about the geometric center of the first vibration transmitting sheet 521, the stress of the vibration transmitting sheet in the working state can be balanced, the vibration transmitting sheet is prevented from being unbalanced and overturned, and the fatigue resistance of the vibration transmitting sheet during overturned is improved.
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 transmitting plate 521, so that fatigue resistance of the first vibration transmitting plate 521 in the long axis direction can be compensated for, and cracking or breaking of the vibration transmitting plate in the long axis direction can be avoided.
Table 1 compares the influence of the distribution mode of the dual vibration transmission sheets on the fatigue resistance performance in the long axis direction, the short axis direction and the vertical axis direction thereof through experiments, but the vibration transmission sheets can also receive overturning forces in the long axis direction and the short axis direction in the working state, so that the influence of the fatigue resistance performance of the vibration transmission sheets, which are overturned in the long axis direction and the short axis direction, on the service life of the vibration transmission sheets is not negligible. When a roller experiment is carried out, a certain overturning load is applied to the vibration transmission sheets which are arranged independently and the double vibration transmission sheets (comprising three connecting rods) which are distributed in a distribution mode shown in fig. 2 in the long axis direction and the short axis direction, so that the corresponding failure cycle times are measured, and the specific results are shown in table 2.
TABLE 2
As is clear from table 2, the fatigue resistance of the two vibration transmitting sheets in which the projections in the vibration direction overlap, the two vibration transmitting sheets in which the projections in the vibration direction are symmetrical in the long axis direction thereof, the two vibration transmitting sheets in which the projections in the vibration direction are symmetrical in the short axis direction thereof, and the two vibration transmitting sheets in which the projections in the vibration direction are symmetrical in the center thereof are each inferior to that of the vibration transmitting sheet provided alone. The two vibration transmitting sheets (including the three connecting rods) symmetrically distributed along the projection of the vibration direction can improve the fatigue resistance of the vibration transmitting sheets in the long axis direction, the short axis direction and the vertical axis direction, but the fatigue resistance around the long axis direction and the short axis direction is very weak, especially the fatigue resistance around the long axis direction.
By applying a certain overturning load to the two vibration transmitting sheets (vibration transmitting sheets shown in fig. 5A-5B) with four connecting rods symmetrically distributed along the projection of the vibration direction and the two vibration transmitting sheets (vibration transmitting sheets shown in fig. 6A-6D) with two connecting rods symmetrically distributed along the projection of the vibration direction around the long axis and around the short axis, the corresponding failure cycle times are measured, and the failure cycle times corresponding to the two vibration transmitting sheets with two connecting rods symmetrically distributed shown in fig. 6A-6D are larger than the failure cycle times corresponding to the two vibration transmitting sheets with four connecting rods symmetrically distributed shown in fig. 5A-5B, and the preferred failure cycle times are exemplified as shown in table 3.
TABLE 3 Table 3
Based on tables 2 and 3, in some embodiments, to improve the fatigue resistance of the vibration transmitting sheet in the long axis direction and the short axis direction, two vibration transmitting sheets symmetrically distributed along the projection of the vibration direction may use two connecting rods symmetrically distributed, for example, two vibration transmitting sheets may use two connecting rods symmetrically distributed about the center as shown in fig. 6A to 6D, so as to improve the fatigue resistance of the vibration transmitting sheet in the long axis direction, the short axis direction and the vertical axis direction, and improve the fatigue resistance of the vibration transmitting sheet in the long axis direction and the short axis direction.
Fig. 7 is a graph of the frequency response of a speaker using the vibration-transmitting sheets shown in fig. 6B to 6D, respectively. In fig. 7, a curve #1 shows a frequency response curve when the speaker uses the vibration transmitting plate shown in fig. 6B, a curve #2 shows a frequency response curve when the speaker uses the vibration transmitting plate shown in fig. 6C, and a curve #3 shows a frequency response curve when the speaker uses the vibration transmitting plate shown in fig. 6D. As shown in fig. 7, the resonant frequency of the speaker adopting the dual-vibration-transmitting-sheet structure with two connecting rods is not greater than 300Hz, so that the frequency response of the speaker at low frequency can be improved, and meanwhile, the frequency response curve of the speaker in a wider frequency band can be flatter, so that the signal-to-noise ratio of the speaker in a specific frequency band (for example, 300Hz-5000 Hz) can be improved. It should be noted that the above-mentioned frequency response curve is to test the vibration displacement of the speaker by the Klippel analyzer on the premise of clamping the ear hook of the speaker, and convert the vibration displacement into acceleration (dB value, refer to acceleration 1E-6m/s 2), wherein the test voltage is 1Vrms.
In some embodiments, the two vibration-transmitting sheets may include a first vibration-transmitting sheet and a second vibration-transmitting sheet, the first vibration-transmitting sheet and the second vibration-transmitting sheet being identical in structure. The first vibration-transmitting sheet and the second vibration-transmitting sheet may have a long axis direction and a short axis direction (i.e., a long axis dimension is larger than a short axis dimension), such as the racetrack-shaped first vibration-transmitting sheet 321 shown in fig. 4. In order to ensure the fatigue resistance of the two vibration transmission sheets in different directions (such as a long axis direction, a short axis direction, a vertical axis direction, a long axis winding direction and a short axis winding direction), the service lives of the two vibration transmission sheets are prolonged, and the rigidity coefficients of the two vibration transmission sheets in the long axis direction, the short axis direction, the vertical axis direction, the long axis winding direction and the short axis winding direction are required to be limited.
In some embodiments, the first vibration-transmitting sheet and the second vibration-transmitting sheet may have a long axis direction and a short axis direction, and the equivalent stiffness of the first vibration-transmitting sheet and the second vibration-transmitting sheet in the long axis direction may be in the range of 7500N/m to 12500N/m, so as to ensure fatigue resistance of the first vibration-transmitting sheet and the second vibration-transmitting sheet in the long axis direction, and prevent cracking or breaking of the two vibration-transmitting sheets in the long axis direction. The preferable range of equivalent stiffness of the first vibration-transmitting sheet and the second vibration-transmitting sheet in the long axis direction may include 8500N/m to 11500N/m, 9000N/m to 10000N/m, or 9500N/m to 10500N/m. The equivalent stiffness of the first vibration-transmitting sheet and the second vibration-transmitting sheet in the long axis direction means the resistance of the two vibration-transmitting sheets to deformation and lifting in the long axis direction.
In some embodiments, the first vibration-transmitting sheet and the second vibration-transmitting sheet may have a long axis direction and a short axis direction, and the equivalent stiffness of the first vibration-transmitting sheet and the second vibration-transmitting sheet in the short axis direction may be in the range of 15000N/m to 25000N/m, so as to ensure fatigue resistance of the first vibration-transmitting sheet and the second vibration-transmitting sheet in the short axis direction and prevent cracking or breaking of the first vibration-transmitting sheet and the second vibration-transmitting sheet in the short axis direction. The preferred range of equivalent stiffness of the first vibration-transmitting sheet and the second vibration-transmitting sheet in the short axis direction may include 16000N/m to 24000N/m, 17000N/m to 23000N/m, 18000N/m to 22000N/m, or 19000N/m to 21000N/m. The equivalent stiffness of the first vibration-transmitting sheet and the second vibration-transmitting sheet in the short axis direction means the resistance of the two vibration-transmitting sheets to deformation and lifting in the short axis direction.
In some embodiments, when the first vibration-transmitting sheet may be circular (for example, the edge area 1012 shown in fig. 10A and 10B is circular, and the major axis dimension and the minor axis dimension are the same), the equivalent stiffness of the first vibration-transmitting sheet and the second vibration-transmitting sheet along the extending direction of the connecting rod may be in the range of 10000N/m to 20000N/m, so as to ensure the fatigue resistance of the first vibration-transmitting sheet and the second vibration-transmitting sheet along the extending direction of the connecting rod, and prevent the first vibration-transmitting sheet or the second vibration-transmitting sheet from cracking or breaking in the extending direction of the connecting rod. When the first vibration-transmitting sheet and the second vibration-transmitting sheet are circular, the preferable range of equivalent stiffness of the first vibration-transmitting sheet and the second vibration-transmitting sheet in the extending direction of the connecting rod may include 11000N/m to 19000N/m, 12000N/m to 18000N/m, 13000N/m to 17000N/m, or 14000N/m to 16000N/m.
In some embodiments, when the first vibration-transmitting sheet and the second vibration-transmitting sheet are racetrack-shaped or circular, the equivalent stiffness of the first vibration-transmitting sheet and the second vibration-transmitting sheet in the vertical axis direction (i.e., the vibration direction) may be in the range of 1200N/m to 2000N/m, so as to ensure the fatigue resistance of the first vibration-transmitting sheet and the second vibration-transmitting sheet in the vertical axis direction, and prevent the first vibration-transmitting sheet or the second vibration-transmitting sheet from cracking or breaking in the vertical axis direction. When the first vibration-transmitting sheet and the second vibration-transmitting sheet are racetrack-shaped or circular, the preferable range of equivalent stiffness of the first vibration-transmitting sheet and the second vibration-transmitting sheet in the vertical axis direction may include 1300N/m to 1900N/m, 1400N/m to 1800N/m, or 1500N/m to 1700N/m. The equivalent rigidity K of the first vibration transmission sheet and the second vibration transmission sheet in the vertical axis direction (namely, the vibration direction) can be realized through the mass m of the magnetic circuit assembly and the resonance frequency f of the loudspeaker 0 By the formula k=m× (2pi f 0 ) 2 Calculation ofObtained.
In some embodiments, the first vibration-transmitting sheet and the second vibration-transmitting sheet may have a long axis direction and a short axis direction, and the equivalent stiffness of the first vibration-transmitting sheet and the second vibration-transmitting sheet when turned around the long axis direction may be in the range of 0.05-0.15n x m/rad, so as to ensure the fatigue resistance of the first vibration-transmitting sheet and the second vibration-transmitting sheet when turned around the long axis direction, and prevent the first vibration-transmitting sheet or the second vibration-transmitting sheet from cracking or breaking when turned around the long axis direction. The preferred range of equivalent stiffness of the first and second vibration-transmitting sheets in the direction of the long axis may include 0.07-0.14n x m/rad, 0.08-0.12n x m/rad, or 0.09-0.11n x m/rad. The equivalent stiffness of the first vibration-transmitting sheet and the second vibration-transmitting sheet when turned around the long axis direction means the resistance of the two vibration-transmitting sheets to deformation and lifting when turned around the long axis direction.
In some embodiments, the first vibration-transmitting sheet and the second vibration-transmitting sheet may have a long axis direction and a short axis direction, and the equivalent stiffness of the first vibration-transmitting sheet and the second vibration-transmitting sheet when turned around the short 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 sheet when turned around the short axis direction, and prevent the first vibration-transmitting sheet from cracking or breaking when turned around the short axis direction. The preferred range of equivalent stiffness of the first vibration-transmitting sheet in the direction of the minor axis may include 0.12-0.18n x m/rad, 0.13-0.17n x m/rad, or 0.14-0.16n x m/rad. The equivalent stiffness of the first vibration-transmitting sheet and the second vibration-transmitting sheet turned around the short axis direction means the resistance of the two vibration-transmitting sheets to deformation and lifting when turned around the short axis direction.
In some embodiments, when the first vibration-transmitting sheet and the second vibration-transmitting sheet are circular, the first vibration-transmitting sheet and the second vibration-transmitting sheet are subjected to a turning force around the extending direction of the connecting rod, and the equivalent stiffness of the first vibration-transmitting sheet and the second vibration-transmitting sheet turned around the extending direction of the connecting rod can be in the range of 0.1n×m/rad to 0.15n×m/rad, so as to ensure the fatigue resistance of the first vibration-transmitting sheet and the second vibration-transmitting sheet turned around the extending direction of the connecting rod, and prevent the first vibration-transmitting sheet or the second vibration-transmitting sheet from cracking or breaking when turned around the extending direction of the connecting rod. When the first vibration-transmitting sheet and the second vibration-transmitting sheet are circular, the preferred range of equivalent stiffness of the first vibration-transmitting sheet and the second vibration-transmitting sheet in the overturning around the extending direction of the connecting rod may include 0.11-0.14n x m/rad, 0.12-0.135n x m/rad, or 0.125-0.13n x m/rad. The roll stiffness of the first vibration-transmitting sheet and the second vibration-transmitting sheet may be calculated by calculating a moment=stiffness-angle (radian system).
Fig. 10A and 10B are schematic structural views of vibration-transmitting sheets provided according to some embodiments of the present disclosure. As shown in fig. 10A, the edge area 1012 of the vibration-transmitting sheet is circular, the central area 1011 is located in the hollowed-out area of the edge area, one end of the connecting rod 1013 is connected to the outer edge of the central 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 employ a serpentine structure, where the serpentine structure includes a plurality of serpentine structures, and the serpentine structure is curved to provide the connecting rod with a predetermined spring rate. Specifically, the connecting rod 1013 has 2 bending structures, which are in a continuous two-bend shape. The bending structure can reduce the elastic coefficient of the connecting rod in a specific direction (such as a radial direction) to strengthen the toughness of the connecting rod and increase the deformability of the vibration transmission sheet, so that the impact of load on the connecting rod in the specific direction is effectively reduced, and the service life of the vibration transmission sheet is prolonged. In some embodiments, the number of the connecting rods 1013 may be plural, for example, two as shown in fig. 10A, and the plurality of connecting rods 1013 may be symmetrically disposed, so that when the magnetic circuit assembly vibrates along the vibration direction, the stress of the magnetic circuit assembly is balanced, and the situation that the magnetic circuit assembly vibrates away from the vibration direction is reduced. Referring to fig. 10B, the connection bars 1013 may have an arc-shaped sheet structure, the number of the connection bars 1013 is three, and the three connection bars 1013 may be symmetrical with respect to the center of the vibration transmitting sheet. It should be noted that the number of the connecting rods is not limited to two or three as shown in fig. 10A and 10B, but may be three or more. In addition, the connecting rod is not limited to the bent structure or the arc-shaped sheet structure shown in fig. 10A and 10B.
In some embodiments, the stiffness of the first and second vibration-transmitting plates in different directions is related to the structure (e.g., degree of bending) of the connecting rod and the distribution position of the connecting rod relative to the center and edge regions. In some embodiments, the stiffness coefficients of the first and second vibration-transmitting plates are related to parameters of the connecting rod itself, e.g., the stiffness coefficients of the first and second vibration-transmitting plates are related to the thickness and width of the connecting rod.
In some embodiments, the rigidity coefficients of the two vibration-transmitting sheets in each direction can be made to satisfy a defined range by adjusting the width dimension and the thickness dimension of the connecting rod. Wherein the width dimension of the connecting rod refers to a dimension perpendicular to the extending direction of the connecting rod (see a dimension shown in fig. 4), and the thickness dimension of the connecting rod refers to a dimension of the connecting rod in the vertical axis direction (i.e., vibration direction). In some embodiments, the width of each connecting rod may range from 0.2mm to 0.66mm. The preferred range of connecting rod widths may include 0.3mm to 0.52mm. In some embodiments, the thickness of each connecting rod may range from 0.1mm to 0.15mm. In some embodiments, by adjusting the width dimension and the thickness dimension of the connecting rod, the rigidity coefficient of the connecting rod may be increased, so that the rigidities of the first vibration-transmitting sheet and the second vibration-transmitting sheet in each direction meet a defined range, and the resonance peaks generated by the vibration of the first vibration-transmitting sheet and the second vibration-transmitting sheet along with the magnetic circuit assembly 110 may also meet a specific range. In some embodiments, the first vibration-transmitting sheet and the second vibration-transmitting sheet vibrate with the magnetic circuit assembly 110 to generate a resonance peak not exceeding 300Hz, so that the frequency response of the speaker 100 at low frequency can be improved, and meanwhile, the frequency response curve of the speaker 100 in a wider frequency band can be flatter, so that the signal-to-noise ratio of the speaker 100 is improved.
Furthermore, in some embodiments, the stiffness coefficients of the first and second vibration-transmitting sheets are also related to the material of the first and second vibration-transmitting sheets. In some embodiments, the material of the two vibration-transmitting sheets may be beryllium copper, stainless steel, or the like.
In some embodiments, the width dimension of the connecting rod may be different in its direction of extension. As shown in fig. 4, taking the first connecting rod 3213 as an example, the first connecting rod 3213 includes a first portion 32131 connecting the central region 3211, a second portion 32133 connecting the edge regions 3212, and a third portion 32132 located between the first portion 32131 and the second portion 32133, and in an operating state of the vibration transmitting sheet, stresses of the first portion 32131 connecting the central region 3211 and the second portion 32133 connecting the edge regions 3212 are relatively concentrated, so that structural stability of the connecting rod is ensured, and cracking or breaking of the first portion 32131 and the second portion 32133 of the connecting rod is avoided, so that rigidity coefficients of the first portion 32131 and the second portion 32133 of the connecting rod can be improved. In some embodiments, the width of the first and second portions 32131, 32133 may be greater than the width of the third portions 32132 to increase the stiffness coefficient of the first and second portions 32131, 32133 of the connecting rod, thereby enhancing the structural strength between the connecting rod and the central and edge regions 3211, 3212. The widths of the different regions of the connecting rod are different, taking the first connecting rod 3213 as an example, the resonance frequency of the speaker is mainly inversely related to the width of the third portion 32132, for example, the larger the width of the third portion 32132 is, the smaller the resonance frequency of the speaker is, and the fatigue resistance of the speaker is positively related to the width of the connecting rod, so that the resonance frequency of the speaker is prevented from being too high, and the fatigue resistance of the speaker is ensured, and the width of the third portion 32132 is not too large or too small. Based on this, in some embodiments, the width of the third portion 32132 is 0.2mm-0.66mm, so that the resonant frequency of the speaker is not greater than 300Hz, while guaranteeing the fatigue resistance of the vibration transmitting sheet, improving the service life of the vibration transmitting sheet.
With continued reference to fig. 1 and 2, in some embodiments, the magnetic circuit assembly 110 includes a first magnet 111, a magnetically permeable plate 112, a second magnet 113, and a magnetically permeable cover 114 disposed in the order of the vibration direction shown in fig. 2. In some embodiments, the first magnet 111 and the second magnet 113 may be respectively connected to opposite sides of the magnetic conductive plate 112 in the vibration direction. In some embodiments, the magnetically permeable cover 114 is disposed on a side of the second magnet 113 away from the first magnet 111, and the magnetically permeable cover 114 surrounds the first magnet 111, the magnetically permeable plate 112, and the second magnet 113 in the vibration direction (i.e. the bottom surface of the groove of the magnetically permeable cover 114 is connected with the side of the second magnet 113 away from the first magnet 111). In some embodiments, the speaker 100 may further include a coil 140, the coil 140 extending into the gap between the first magnet 111 and the magnetically permeable cover 114 from a side away from the magnetically permeable cover 114 in the vibration direction. The magnetic field generated after the coil 140 is energized interacts with the magnetic field formed by the magnetic circuit assembly 110 to drive the magnetic circuit assembly 110 to produce mechanical vibrations.
In some embodiments, the two vibration transmitting sheets of the speaker 100 may include a first vibration transmitting sheet 121 and a second vibration transmitting sheet 122 (hereinafter, simply referred to as vibration transmitting sheets), wherein the first vibration transmitting sheet 121 and the second vibration transmitting sheet 122 have the same structure. The vibration-transmitting sheet may be a first vibration-transmitting sheet (for example, the first vibration-transmitting sheet 321, 421 or 521) provided in any embodiment of the present disclosure. In some embodiments, the first vibration-transmitting piece 121 is disposed on a side of the first magnet 111 facing away from the second magnet 113 to support the magnetic circuit assembly 110, and the second vibration-transmitting piece 122 is disposed on a side of the second magnet 113 facing away from the first magnet 111 to support the magnetic circuit assembly 110. In some embodiments, the central region of the first vibration-transmitting piece 121 is connected to a side of the first magnet 111 facing away from the second magnet 113, and the central region of the second vibration-transmitting piece 122 is connected to a side of the second magnet 113 facing away from the first magnet 111. Wherein the two projections of the first vibration-transmitting sheet 121 and the second vibration-transmitting sheet 122 along the vibration direction may coincide, be symmetrical along the major axis direction, be symmetrical along the minor axis direction, or be centrally symmetrical (e.g., 4 distribution patterns shown in fig. 3).
In some embodiments, the vibration-transmitting plate and magnetic circuit assembly 110 is located within the receiving cavity of the housing 131. In some embodiments, the vibration-transmitting sheet may be directly connected to the housing 131. For example, the edge region of the vibration-transmitting sheet is connected to one or more of the inner wall of the case 131 circumferentially by means of a snap fit, glue bonding, or the like. For another example, the casing 131 has an open structure, and the edge area of the vibration-transmitting sheet is located at an opening on the casing 131, and the opening is covered with a cover plate to fix the edge area of the vibration-transmitting sheet and the casing 131. The central region of the vibration-transmitting plate is used to connect the magnetic circuit assembly 110, for example, the central region is connected to the magnetic circuit assembly 110 by bonding, welding, screwing, or the like. In some embodiments, a first connecting piece 150 is disposed on a side, close to the magnetic circuit assembly 110, of the central area of the first vibration transmitting piece 121, a second connecting piece 151 is disposed on a side, close to the magnetic circuit assembly, of the central area of the second vibration transmitting piece 122, and the first connecting piece 150 and the second connecting piece 151 are fixedly connected with the magnetic circuit assembly 110 through a screw 160, so that connection between the central area of the vibration transmitting piece and the magnetic circuit assembly 110 is achieved. Specifically, the central regions of the first and second connection members 150 and 151 are provided with screw holes, and both ends of the screw 160 are respectively connected with the screw holes of the central regions of the first and second connection members 150 and 151 by screw-fitting. When the magnetic circuit assembly 110 vibrates, the vibration can be transmitted to the case 131 through the vibration transmitting sheet, and finally transmitted to the auditory nerve of the user, so that the user hears the sound. The connection between the first connector 150 and the second connector 151 and the central region of the vibration-transmitting plate is not limited to the above-described threaded connection, and may be a welding, bonding, interference fit, or the like. The connection manner of the first connection member 150 and the first vibration transmitting sheet 121 and the connection manner of the second connection member 151 and the second vibration transmitting sheet 122 may be the same or different. For example, the first connection member 150 is connected to the central region of the first vibration-transmitting plate 121 by screw connection, and the second connection member 151 is connected to the central region of the second vibration-transmitting plate 122 by welding.
The loudspeaker 100 supports the magnetic circuit assembly 110 from the two sides of the magnetic circuit assembly 110 along the vibration direction by adopting the double vibration transmission sheets, so that the vibration of the magnetic circuit assembly 110 in the vibration direction can be reduced, the influence of the vibration of the magnetic circuit assembly 110 on the vibration transmission sheets is correspondingly reduced, the amplitude of the vibration transmission sheets turning around the long axis direction or the short axis direction of the vibration transmission sheets is reduced, the time for breaking and damaging the vibration transmission sheets is greatly prolonged, and the service life of the vibration transmission sheets is ensured.
In some embodiments, the magnetic circuit assembly 110 may collide with the vibration transmitting plate during vibration, affecting the acoustic performance of the speaker 100 and the service life of the vibration transmitting plate, and in order to avoid collision of the magnetic circuit assembly 110 with the vibration transmitting plate in the vibration direction, a distance B (see fig. 2) between two opposite sides of the first magnet 111 and the first vibration transmitting plate 121 is not less than 0.9mm. Similarly, the distance C (see fig. 2) between the two opposite sides of the magnetic conductive cover 114 and the second vibration-transmitting sheet 122 is not less than 0.9mm. In some embodiments, in order to make the size of the speaker 100 as small as possible to improve portability of the speaker 100 while avoiding collision of the magnetic circuit assembly 110 with the vibration transmitting sheet, the distance B and the distance C may be in the range of 0.9mm-1.8 mm. Preferably, the distance B and the distance C may be in the range of 0.9mm-1.6 mm. More preferably, the distance B and the distance C may be in the range of 0.9mm-1.4 mm.
By defining the distance between the magnetic circuit assembly 110 and the vibration transmitting sheet, the magnetic circuit assembly 110 can be prevented from colliding with the vibration transmitting sheet in the vibration process, and the acoustic performance of the loudspeaker 100 and the service life of the vibration transmitting sheet can be ensured.
Referring to fig. 2, in some embodiments, the magnetic circuit assembly 110 may also collide with a bracket (e.g., the first bracket 132), the coil 140, or the case 131 during vibration deviating from the vibration direction, in order to avoid collision of the magnetically permeable cover 114 of the magnetic circuit assembly 110 with the coil 140, the magnetic circuit assembly 110 with the bracket in a direction perpendicular to the vibration direction, and a distance D (also referred to as an inner magnetic gap) between the magnetic element (e.g., the first magnet, the magnetically permeable plate, and the second magnet) and the first bracket 132 and a distance D (also referred to as an outer magnetic gap) between the magnetically permeable cover 114 and the coil 140 in a direction perpendicular to the vibration direction are not less than 0.3mm. In order to avoid collision of the magnetically permeable cover 114 of the magnetic circuit assembly 110 with the housing 131 in a direction perpendicular to the vibration direction, a distance E (see fig. 2) between opposite sides of the magnetically permeable cover 114 and the housing 131 is not less than 0.3mm in the direction perpendicular to the vibration direction. In some embodiments, the distances D and E may be in the range of 0.3mm-1mm in order to make the size of the speaker 100 as small as possible to improve portability of the speaker 100 while avoiding collision of the magnetic circuit assembly 110 with the coil 140 or the case 131. Preferably, the distance D and the distance E may be in the range of 0.3mm-0.8 mm. More preferably, the distance D and the distance E may be in the range of 0.3mm-0.6 mm.
In some embodiments, referring to fig. 1 and 2, the supporting portion 130 may further include a first bracket 132 and a second bracket 133, where the first bracket 132 and the second bracket 133 are disposed at intervals along the vibration direction and are fixedly connected with the housing 131, and the first bracket 132 and the second bracket 133 respectively provide a mounting platform for the first vibration transmitting sheet 121 and the second vibration transmitting sheet 122, and meanwhile, the first bracket 132 also provides a mounting platform for the coil 140. In some embodiments, the coil 140 is fixed to the first bracket 132 at an edge region of the first vibration-transmitting sheet 121, and the second bracket 133 is fixed to an edge region of the second vibration-transmitting sheet 122. Specifically, a partial region (e.g., a portion near the peripheral side thereof) on the edge region of the first vibration-transmitting sheet 121 is embedded in the first bracket 132, and the side of the coil 140 near the magnetic circuit assembly 110 is connected to the first bracket 132. In some embodiments, the coil 140 may also be secured to the housing 131 or the first bracket 132 by other means. For example, the coil 140 is directly connected to the inner wall of the case 131 through a connection rod. For another example, the first leg 132 does not extend into the magnetic gap between the magnetically permeable cover 114 and the magnetic element (e.g., the first magnet, the magnetically permeable plate, and the second magnet), and one end of the coil 140 is connected to the first leg 132 and the other end extends into the magnetic gap. A partial region (e.g., a portion near the peripheral side thereof) on the edge region of the second vibration-transmitting sheet 122 is embedded in the second bracket 133.
Through setting up first support 132 fixed first piece 121 and the coil 140 of shaking, can guarantee the uniformity of vibration subassembly vibration, simultaneously, through setting up the second support 133 fixed second piece 122 of shaking, can improve coil 140, the mutual structural stability of piece and magnetic circuit assembly 110 that shakes, guarantee that coil 140, the piece and magnetic circuit assembly 110 that shakes can reliably move in loudspeaker 100's long-term course of working.
Regarding the end provided with the magnetic conductive cover 114 as the bottom of the magnetic circuit assembly 110, since the magnetic conductive cover 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 transmitting sheet 122 close to the bottom of the magnetic circuit assembly 110 can be made to be greater than that of the first vibration transmitting sheet 121 far away from the bottom of the magnetic circuit assembly 110, so that the second vibration transmitting sheet 122 can adapt to larger-amplitude shaking of the magnetic circuit assembly 110 near the bottom area thereof, which is beneficial to reducing shaking of the magnetic circuit assembly 110 during vibration in the vibration direction, and meanwhile preventing the magnetic circuit assembly 110 from tilting. In some embodiments, the Young's modulus of the second vibration transmitting sheet 122 is greater than the Young's modulus of the first vibration transmitting sheet 121, achieving a stiffness of the second vibration transmitting sheet 122 that is greater than the stiffness of the first vibration transmitting sheet 121. For example, the material of the second vibration-transmitting sheet 122 is stainless steel having a large young's modulus, and the material of the first vibration-transmitting sheet 121 is beryllium copper having a small young's modulus. In order for the second vibration transmitting plate 122 to be able to accommodate a larger amplitude of the vibration of the magnetic circuit assembly 110 near the bottom region thereof, the vibration of the magnetic circuit assembly 110 when vibrating in the vibration direction is reduced while preventing the magnetic circuit assembly 110 from tilting, the ratio of the young's modulus of the second vibration transmitting plate 122 to the young's modulus of the first vibration transmitting plate 121 is in the range of 1 to 1.5 in some embodiments.
Through setting up the second that hardness is greater than first piece 121 hardness that shakes 122 that shakes, can make the second pass the piece 122 that shakes and the rocking of bigger weight of the greater range of magnetic circuit assembly 110 near its bottom region department, can guarantee that the life of first piece 121 that shakes and second pass the piece 122 and tend to agree, prevent simultaneously that magnetic circuit assembly 110 from producing the slope, be favorable to reducing the rocking of magnetic circuit assembly 110 when the vibration direction vibrates.
In some embodiments, the first vibration-transmitting sheet 121 and the second vibration-transmitting sheet 122 included in the speaker 100 may be asymmetrically distributed between two projections along the vibration direction, and other portions of the speaker 100 (such as the supporting portion 130 and the magnetic circuit assembly 110) may be referred to in fig. 1 and 2 and the related description.
In some embodiments, when the two vibration-transmitting sheets are asymmetrically distributed along two projections of the vibration direction, the two vibration-transmitting sheets may be two vibration-transmitting sheets having different structures. In some embodiments, the two structurally different vibration transmitting sheets may be different in shape, for example, the first vibration transmitting sheet 121 is a circular vibration transmitting sheet and the second vibration transmitting sheet 122 is a racetrack-shaped vibration transmitting sheet. In some embodiments, the two structurally different vibration-transmitting sheets may differ in the number and/or configuration of the connecting rods. Fig. 7 is a schematic diagram of three distributions of vibration-transmitting sheets according to some embodiments of the present description. Fig. 9 is a schematic diagram of three distributions of vibration-transmitting sheets according to some embodiments of the present description. In fig. 8 a, b and c are shown two structurally different embodiments in which the vibration-transmitting plate comprises a different number of connecting rods. In fig. 9 a, b and c are shown various embodiments of two structurally different vibration-transmitting plates comprising connecting rods. The first vibration-transmitting sheet 121 or the second vibration-transmitting sheet 122 may be any one of those shown in fig. 4 to 6D.
In some embodiments, when the two vibration-transmitting sheets are asymmetrically distributed along two projections of the vibration direction, the two vibration-transmitting sheets may be two vibration-transmitting sheets with the same structure, but the arrangement angles of the two vibration-transmitting sheets are different. Specifically, taking a racetrack-shaped vibration-transmitting sheet as an example, the vibration-transmitting sheet has a long axis direction and a short axis direction, and the long axis direction of the first vibration-transmitting sheet 121 and the long axis direction of the second vibration-transmitting sheet 122 are arranged at a certain angle, so that the arrangement angles of the two vibration-transmitting sheets are different. For example, the long axis direction of the first vibration-transmitting sheet 121 is perpendicular to the long axis direction of the second vibration-transmitting sheet 122, the inner edge of the edge region of the first vibration-transmitting sheet 121 is located at the outer edge of the edge region of the second vibration-transmitting sheet 122, the center region of the first vibration-transmitting sheet 121 is not in contact with the center region of the second vibration-transmitting sheet 122, and the magnetic circuit assembly is located at the center region of the first vibration-transmitting sheet 121 or the second vibration-transmitting sheet 122.
The first vibration transmitting sheet 121 and the second vibration transmitting sheet 122 which are asymmetrically distributed are respectively located on two opposite sides of the magnetic circuit assembly 110 along the vibration direction, and vibration of the magnetic circuit assembly 110 is limited by the vibration transmitting sheets on two sides, so that on one hand, vibration of the magnetic circuit assembly 110 during vibration can be reduced, and on the other hand, through the arrangement of the double vibration transmitting sheets, vibration of the magnetic circuit assembly 110 is reduced, the amplitude of the vibration transmitting sheets turned around the long axis direction or the short axis direction of the double vibration transmitting sheets is reduced, so that the time for breaking and damaging the vibration transmitting sheets is greatly prolonged, and the service life of the vibration transmitting sheets is ensured. For specific description of the first vibration-transmitting sheet 121 and the second vibration-transmitting sheet 122, reference may be made to the description related to the vibration-transmitting sheets in the foregoing (e.g., fig. 1, fig. 4 to fig. 6D), and the description is omitted here.
In some embodiments, the first vibration-transmitting piece 121 is disposed away from the magnetically permeable cover 114 of the magnetic circuit assembly 110, and the second vibration-transmitting piece 122 is disposed proximate to the magnetically permeable cover 114 of the magnetic circuit assembly 110. Because of the presence of the magnetically permeable cover 114 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, the distance from the center of gravity of the magnetic circuit assembly 110 to the second vibration-transmitting piece 122 is smaller than the distance from the first vibration-transmitting piece 121 in the vibration direction, and therefore, the second vibration-transmitting piece 122 needs to have greater rigidity and hardness than the first vibration-transmitting piece 121 to resist overturning and fatigue.
In some embodiments, the second vibration-transmitting piece 122 may have a hardness greater than that of the first vibration-transmitting piece 121, so that the second vibration-transmitting piece 122 can accommodate a larger vibration of the magnetic circuit assembly 110 near the bottom region thereof, which is beneficial to reducing the vibration 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 width of the connecting rod of the second vibration-transmitting sheet 122 may be greater than the width of the connecting rod of the first vibration-transmitting sheet 121, achieving a hardness of the second vibration-transmitting sheet 122 that is greater than the hardness of the first vibration-transmitting sheet 121.
The width of the connecting rod of the second vibration transmission piece 122 is larger than that of the connecting rod of the first vibration transmission piece 121, so that the hardness of the second vibration transmission piece 122 is larger than that of the first vibration transmission piece 121, the second vibration transmission piece 122 can adapt to larger shaking and larger shaking of the magnetic circuit assembly 110 near the bottom area, the service lives of the first vibration transmission piece 121 and the second vibration transmission piece 122 can be guaranteed to be consistent, and meanwhile the magnetic circuit assembly 110 is prevented from inclining, so that shaking of the magnetic circuit assembly 110 in vibration in the vibration direction is reduced.
In some embodiments, the vibration-transmitting plate generates a resonance peak with the magnetic circuit assembly 110 vibrating with not more than 300Hz (e.g., 150Hz-250 Hz), 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, so as to improve the signal-to-noise ratio of the speaker 100. In some embodiments, the second vibration transmitting piece 122 may vibrate with the magnetic circuit assembly 110 to generate a resonance peak of not more than 300Hz by adjusting the thickness and width of the connecting rod of the vibration transmitting piece. But adjusting the width and thickness dimensions of the connecting rod of the vibration-transmitting plate affects the frequency of the resonant peak generated by the vibration of the vibration-transmitting plate with the magnetic circuit assembly 110. In order to ensure that the second vibration transmitting sheet 122 generates a resonance peak not exceeding 300Hz along with the vibration of the magnetic circuit assembly 110, the width of the connecting rod of the second vibration transmitting sheet 122 is larger than that of the connecting rod of the first vibration transmitting sheet 121, and meanwhile, the thickness of the connecting rod of the second vibration transmitting sheet 122 can be smaller than that of the connecting rod of the first vibration transmitting sheet 121, so that the frequency response of the second vibration transmitting sheet 122 at low frequency is improved, and meanwhile, the frequency response curve of the loudspeaker 100 in a wider frequency band is flatter, and the signal to noise ratio of the loudspeaker 100 is improved. It should be noted that, the width of the connecting rod of the second vibration transmitting piece 122 is reduced while the thickness of the connecting rod of the second vibration transmitting piece 122 is increased, so that the shake of the magnetic circuit assembly 110 in the vibration direction can be reduced, and meanwhile, the resonance peak of the second vibration transmitting piece 122 along with the vibration of the magnetic circuit assembly 110 is ensured to be not more than 300Hz, but the width of the connecting rod of the second vibration transmitting piece 122 is increased to be more beneficial to reducing the shake of the magnetic circuit assembly 110 in the vibration direction, so that the thickness of the connecting rod of the second vibration transmitting piece 122 can be reduced while the width of the connecting rod of the second vibration transmitting piece 122 is increased.
Through making the width of the connecting rod of second biography piece 122 be greater than the width of the connecting rod of first biography piece 121, the thickness of the connecting rod of second biography piece 122 is less than the thickness of the connecting rod of first biography piece 121, can prevent that magnetic circuit assembly 110 from producing the slope, be favorable to reducing the rocking of magnetic circuit assembly 110 when vibrating in the vibration direction, and improve the frequency response of speaker 100 when the low frequency, make the frequency response curve that speaker 100 can be in the wider frequency band comparatively even simultaneously.
In some embodiments, the number of the connecting rods of the second vibration transmitting piece 122 may be greater than the number of the connecting rods of the first vibration transmitting piece 121, so that the hardness of the second vibration transmitting piece 122 is greater than that of the first vibration transmitting piece 121, which is beneficial to reducing the shake of the magnetic circuit assembly 110 when vibrating in the vibration direction, and preventing the magnetic circuit assembly 110 from tilting.
In some implementations, as shown in fig. 8 a, the second vibration-transmitting sheet 122 may include 4 connection rods, and the first vibration-transmitting sheet 121 may include 3 connection rods. In some implementations, as shown in fig. 8 b, the second vibration-transmitting sheet 122 may include 3 connection rods, and the first vibration-transmitting sheet 121 may include 2 connection rods. In some implementations, as shown in fig. 8 c, the second vibration-transmitting sheet 122 may include 4 connection rods, and the first vibration-transmitting sheet 121 may include 2 connection rods.
In some embodiments, the young's modulus of the material constituting the second vibration-transmitting piece 122 may be made larger than that of the material constituting the first vibration-transmitting piece 121, so that the hardness of the second vibration-transmitting piece 122 is made larger than that of the first vibration-transmitting piece 121, which is advantageous in reducing the shake of the magnetic circuit assembly 110 when vibrating in the vibration direction, while preventing the magnetic circuit assembly 110 from tilting.
While the basic concepts have been described above, it will be apparent to those skilled in the art that the foregoing detailed disclosure is by way of example only and is not intended to be limiting. Although not explicitly described herein, various modifications, improvements, and adaptations to the present disclosure may occur to one skilled in the art. Such modifications, improvements, and modifications are intended to be suggested within this specification, and therefore, such modifications, improvements, and modifications are intended to be included within the spirit and scope of the exemplary embodiments of the present invention.

Claims (13)

1. A speaker, comprising:
the supporting part, the magnetic circuit component and the positioning component are characterized in that,
the magnetic circuit assembly is connected with the supporting part through the positioning assembly and vibrates relative to the supporting part;
the positioning assembly comprises two vibration transmission sheets, the two vibration transmission sheets are distributed at intervals in the vibration direction of the magnetic circuit assembly, and the two vibration transmission sheets have symmetry along two projections of the vibration direction.
2. The loudspeaker of claim 1, wherein the two vibration-transmitting sheets comprise a first vibration-transmitting sheet comprising a center region, an edge region, and a connecting rod connecting the center region and the edge region, the connecting rod comprising a first portion connecting the center region, a second portion connecting the edge region, and a third portion between the first portion and the second portion, the first portion and the second portion having a width greater than a width of the third portion.
3. The speaker of claim 2, wherein the number of the connection bars is two, and the two connection bars are symmetrical with respect to the center of the first vibration-transmitting sheet.
4. The loudspeaker of claim 2, wherein the connecting rod has a thickness in the range of 0.1mm to 0.15mm.
5. The loudspeaker of claim 2, wherein the third portion of the connecting rod has a width in the range of 0.2mm to 0.66mm.
6. The loudspeaker of any of claims 2-5, wherein the two vibration-transmitting sheets further comprise a second vibration-transmitting sheet, the first vibration-transmitting sheet and the second vibration-transmitting sheet having a major-axis direction and a minor-axis direction, the first vibration-transmitting sheet and the second vibration-transmitting sheet satisfying at least one of the following conditions: equivalent rigidity of the first vibration-transmitting sheet and the second vibration-transmitting sheet along the long axis direction is in the range of 7500N/m-12500N/m;
The equivalent stiffness of the first vibration-transmitting sheet and the second vibration-transmitting sheet along the short axis direction is in the range of 15000N/m-25000N/m;
the equivalent rigidity of the first vibration transmission sheet and the second vibration transmission sheet along the vibration direction is in the range of 1200N/m-2000N/m;
the equivalent rigidity of the first vibration transmission sheet and the second vibration transmission sheet, which are turned around the long axis direction, is in the range of 0.05-0.15N x m/rad;
the equivalent overturning rigidity of the first vibration transmission sheet and the second vibration transmission sheet overturning around the short axis direction is in the range of 0.1-0.2N x m/rad.
7. The loudspeaker of claim 1, wherein the two projections of the two vibration-transmitting sheets are symmetrical about a short axis direction, symmetrical about a long axis direction, or centrally symmetrical.
8. The loudspeaker of claim 1, wherein the magnetic circuit assembly comprises a first magnet, a magnetic conductive plate, a second magnet and a magnetic conductive cover sequentially arranged along the vibration direction, the vibration transmitting sheet comprises a first vibration transmitting sheet and a second vibration transmitting sheet, the first vibration transmitting sheet is positioned at one side of the first magnet away from the magnetic conductive plate, and the second vibration transmitting sheet is positioned at one side of the magnetic conductive cover away from the second magnet.
9. The speaker of claim 8, wherein a distance between two sides of the first magnet opposite to the first vibration-transmitting piece in the vibration direction is not less than 0.9mm, and a distance between two sides of the magnetically permeable cover opposite to the second vibration-transmitting piece is not less than 0.9mm.
10. The loudspeaker of claim 7 or 8, wherein the magnetic circuit assembly vibrates the positioning assembly, and the resonant peak frequency generated by the positioning assembly is not more than 300Hz.
11. The loudspeaker of claim 2, wherein the vibration-transmitting sheet further comprises a second vibration-transmitting sheet, the support portion comprising a housing and first and second brackets for connecting the first and second vibration-transmitting sheets to the housing, respectively;
the edge area of the first vibration transmission sheet is fixed on the first bracket, and the coil of the loudspeaker is fixed on the first bracket;
the edge area of the second vibration transmission sheet is fixed on the second bracket.
12. The loudspeaker of claim 11, wherein the young's modulus of the second vibration-transmitting sheet is greater than the young's modulus of the first vibration-transmitting sheet.
13. The loudspeaker of claim 2, wherein the edge region of the first vibration-transmitting sheet is annular, and the two vibration-transmitting sheets satisfy at least one of the following conditions:
the equivalent rigidity of the two vibration transmission sheets in the extending direction of the connecting rod is in the range of 10000N/m-20000N/m;
the equivalent rigidity of the two vibration transmission sheets in the vibration direction is in the range of 1200N/m-2000N/m;
the equivalent overturning of the two vibration transmission sheets around the extending direction of the connecting rod is in the range of 0.1N m/rad-0.15N m/rad.
CN202321871587.4U 2023-07-14 2023-07-14 Loudspeaker Active CN220422036U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202321871587.4U CN220422036U (en) 2023-07-14 2023-07-14 Loudspeaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202321871587.4U CN220422036U (en) 2023-07-14 2023-07-14 Loudspeaker

Publications (1)

Publication Number Publication Date
CN220422036U true CN220422036U (en) 2024-01-30

Family

ID=89647031

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202321871587.4U Active CN220422036U (en) 2023-07-14 2023-07-14 Loudspeaker

Country Status (1)

Country Link
CN (1) CN220422036U (en)

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