Diaphragm structure and speaker

Abstract

The present invention specifically discloses a sound membrane structure and a loudspeaker. The sound membrane structure of the present invention includes at least two sound membrane parts, at least two first coil bodies and at least two second coil bodies. The sound membrane part includes a sound membrane body, a first magnetic circuit and a second magnetic circuit. The sound membrane body includes a first side surface and a second side surface that are arranged oppositely. The first magnetic circuit is fixedly arranged with the first side surface, and the second magnetic circuit is fixedly arranged with the second side surface. Two adjacent sound membrane parts are symmetrically laid flat. The plane of the sound membrane body is perpendicular to the laying direction of the sound membrane part. The sound membrane body is arranged between the first coil body and the second coil body. The first coil body and the second coil body are fixedly arranged. The groove of the first magnetic circuit accommodates the end of the first coil body, and the groove of the second magnetic circuit accommodates the end of the second coil body. The first magnetic circuit can be close to or away from the first coil body, and the second magnetic circuit can be close to or away from the second coil body. The sound membrane structure of the present invention has a high degree of coupling with air, high electroacoustic conversion efficiency and high sound pressure level.

Description

Technical Field

[0001] The present invention relates to the technical field of loudspeakers, and in particular to a sound membrane structure and a loudspeaker. Background Art

[0002] The sound diaphragm of a traditional speaker is directly coupled to the air connected to it through its surface. When the sound diaphragm vibrates, it drives the air to vibrate, thereby emitting and transmitting sound. Therefore, generally speaking, the larger the sound diaphragm, the more beneficial it is to sound radiation.

[0003] However, for micro speakers, the area of ​​the diaphragm is much smaller than that of conventional speakers, which is not conducive to the coupling between the diaphragm and the air, resulting in low electroacoustic conversion efficiency and low sound pressure level of the micro speakers. The electroacoustic conversion efficiency refers to the percentage of unlost electrical energy converted into sound energy, and the sound pressure level refers to the decibel number of the sound pressure generated on the sound axis at 1 meter away from the sound source relative to the reference sound pressure. Summary of the invention

[0004] One purpose of an embodiment of the present invention is to provide a sound membrane structure with high air coupling, high electroacoustic conversion efficiency and high sound pressure level.

[0005] Another object of an embodiment of the present invention is to provide a speaker with a small size, high electro-acoustic conversion efficiency and high sound pressure level.

[0006] To achieve this purpose, the embodiment of the present invention adopts the following technical solutions:

[0007] In a first aspect, a sound membrane structure is provided, comprising at least two sound membrane pieces, at least two first coil bodies and at least two second coil bodies, the sound membrane piece comprising a sound membrane body, a first magnetic circuit and a second magnetic circuit, the sound membrane body comprising a first side surface and a second side surface arranged opposite to each other, the first magnetic circuit is fixedly arranged with the first side surface, the second magnetic circuit is fixedly arranged with the second side surface, two adjacent sound membrane pieces are symmetrically laid flat, the plane of the sound membrane body is perpendicular to the laying direction of the sound membrane piece, the sound membrane body is arranged between the first coil body and the second coil body, the first coil body and the second coil body are fixedly arranged, the groove of the first magnetic circuit accommodates the end of the first coil body, the groove of the second magnetic circuit accommodates the end of the second coil body, the first magnetic circuit can approach or move away from the first coil body, and the second magnetic circuit can approach or move away from the second coil body, so that the sound membrane body vibrates and makes sound.

[0008] As a preferred solution of the sound membrane structure, it also includes a fixing plate arranged parallel to the sound membrane body, the fixing plate is fixedly arranged between two adjacent first coil bodies, and / or the fixing plate is fixedly arranged between two adjacent second coil bodies, and the first coil body or the second coil body is fixedly arranged on the fixing plate.

[0009] As a preferred solution of the diaphragm structure, the first side is provided with a first countersunk hole, and the first countersunk hole can accommodate the first magnetic circuit. The second side is provided with a second countersunk hole, and the second countersunk hole can accommodate the second magnetic circuit.

[0010] As a preferred solution of the sound membrane structure, the first magnetic circuit includes a first permanent magnet, a first magnetic bowl and a first magnetic plate, the first permanent magnet is arranged in the groove of the first magnetic bowl, the first magnetic plate is arranged on the side of the first permanent magnet facing away from the first magnetic bowl, the first coil body is provided with a first groove, and the first groove can accommodate the first permanent magnet, the second magnetic circuit includes a second permanent magnet, a second magnetic bowl and a second magnetic plate, the second permanent magnet is arranged in the groove of the second magnetic bowl, the second magnetic plate is arranged on the side of the second permanent magnet facing away from the second magnetic bowl, and the second coil body is provided with a second groove, and the second groove can accommodate the second permanent magnet.

[0011] As a preferred solution of the sound membrane structure, the number of the first magnetic circuits on one sound membrane member is at least two, the second magnetic circuit is arranged between two of the first magnetic circuits, the number of the first coil bodies is at least two, and the second coil body is arranged between two of the first coil bodies.

[0012] As a preferred solution of the sound membrane structure, it also includes a first cover plate arranged perpendicular to the sound membrane body, the first cover plate is arranged on one side of the sound membrane member, the first cover plate is used to cover the gap between every two sound membrane bodies, and the sound membrane body is spaced apart from the first cover plate.

[0013] As a preferred solution of the sound membrane structure, it also includes a second cover plate arranged parallel to the first cover plate, the second cover plate is arranged on the other side of the sound membrane member, the first cover plate is used to cover the gap between every two of the sound membrane bodies, and the second cover plate is opposite to the gap between the two first cover plates.

[0014] As a preferred solution of the sound membrane structure, an elastic material layer is fixedly provided at the end of the sound membrane body in the length direction, and the elastic material layer is fixedly provided away from the end of the sound membrane body.

[0015] As a preferred solution of the sound membrane structure, the elastic material layer is provided with a bending structure.

[0016] In a second aspect, a speaker is provided, comprising a housing and the diaphragm structure, wherein both ends of the length of the diaphragm body of the diaphragm structure are fixedly arranged on the housing, and the first coil body and the second coil body are fixedly arranged on the housing.

[0017] In a third aspect, a sound membrane structure is provided, comprising at least two sound membrane pieces, at least two first magnetic circuits and at least two second magnetic circuits, the sound membrane piece comprising a sound membrane body, a first coil body and a second coil body, the sound membrane body comprising a first side surface and a second side surface arranged opposite to each other, the first coil body and the first side surface are fixedly arranged, the second coil body and the second side surface are fixedly arranged, two adjacent sound membrane pieces are symmetrically laid out, the plane of the sound membrane body is perpendicular to the laying direction of the sound membrane piece, the sound membrane body is arranged between the first magnetic circuit and the second magnetic circuit, the first magnetic circuit and the second magnetic circuit are fixedly arranged, the groove of the first magnetic circuit accommodates the end of the first coil body, the groove of the second magnetic circuit accommodates the end of the second coil body, the first coil body can be close to or away from the first magnetic circuit, and the second coil body can be close to or away from the second magnetic circuit, so that the sound membrane body vibrates and makes sound.

[0018] As a preferred solution of the diaphragm structure, it also includes a fixing plate arranged parallel to the diaphragm body, the fixing plate is fixedly arranged between two adjacent first magnetic circuits, and / or the fixing plate is fixedly arranged between two adjacent second magnetic circuits, and the first magnetic circuit or the second magnetic circuit is fixedly arranged on the fixing plate.

[0019] As a preferred solution of the sound membrane structure, it also includes a first cover plate arranged perpendicular to the sound membrane body, the first cover plate is arranged on one side of the sound membrane member, the first cover plate is used to cover the gap between every two sound membrane bodies, and the sound membrane body is spaced apart from the first cover plate.

[0020] As a preferred solution of the sound membrane structure, it also includes a second cover plate arranged parallel to the first cover plate, the second cover plate is arranged on the other side of the sound membrane member, the first cover plate is used to cover the gap between every two of the sound membrane bodies, and the second cover plate is opposite to the gap between the two first cover plates.

[0021] As a preferred solution of the sound membrane structure, it also includes a consonant membrane body arranged parallel to the sound membrane body, the consonant membrane body is fixedly arranged between two adjacent first magnetic circuits, and / or the consonant membrane body is fixedly arranged between two adjacent second magnetic circuits, and the first magnetic circuit or the second magnetic circuit is fixedly arranged on the consonant membrane body.

[0022] In a fourth aspect, a speaker is provided, comprising a housing and the diaphragm structure, wherein both ends of the length of the diaphragm body of the diaphragm structure are fixedly arranged on the housing, and the first magnetic circuit and the second magnetic circuit are fixedly arranged on the housing.

[0023] The beneficial effects of the embodiments of the present invention are:

[0024] A sound membrane structure is formed by arranging at least two sound membrane pieces, at least two first coil bodies and at least two second coil bodies, wherein the sound membrane piece includes a sound membrane body, a first magnetic circuit and a second magnetic circuit, the sound membrane body includes a first side surface and a second side surface arranged opposite to each other, the first magnetic circuit is fixedly arranged with the first side surface, and the second magnetic circuit is fixedly arranged with the second side surface, and two adjacent sound membrane pieces are symmetrically laid out, so that the sound membrane bodies of the two sound membrane pieces can be symmetrically and parallelly arranged, and the plane of the sound membrane body is perpendicular to the laying direction of the sound membrane piece, so that more sound membrane pieces can be arranged with the same laying area, and the occupied volume of the sound membrane structure of the embodiment of the present invention can be reduced. Furthermore, the sound membrane body is arranged between the first coil body and the second coil body, the first coil body and the second coil body are fixedly arranged, the groove of the first magnetic circuit accommodates the end of the first coil body, and the groove of the second magnetic circuit accommodates the end of the second coil body. When the current corresponding to the audio information is passed through the first coil body or the second coil body, since the first magnetic circuit and the second magnetic circuit are permanent magnets, the current passed through the first coil body cuts the magnetic flux lines of the first magnetic circuit and generates a Lorentz force of the corresponding current magnitude, so that the first magnetic circuit can be driven by the Lorentz force to approach or move away from the first coil body, thereby driving the sound membrane body fixed with the first magnetic circuit to vibrate and make sound; similarly, the current passed through the second coil body can also cut the magnetic flux lines of the second magnetic circuit and generate a Lorentz force of the corresponding current magnitude, which can also drive the second magnetic circuit to approach or move away from the second coil body, and can also drive the sound membrane body fixed with the second magnetic circuit to vibrate and make sound. In addition, when the same current is passed through each first coil body or second coil body, each sound film body connected to the first magnetic circuit or second magnetic circuit can be driven to vibrate in the same manner at the same time. The two adjacent sound film parts are symmetrically laid out, so that the two adjacent sound film bodies can simultaneously make symmetrical relative movements, which can be understood as the two adjacent sound film bodies moving closer to or away from each other, so that the load of the sound film body on the air is doubled. Moreover, the plane of the sound film body is perpendicular to the laid surface of the sound film part. Under the same laid area, the surface area of ​​the sound film body of the embodiment of the present invention is greater than the surface area of ​​the sound film in the prior art, which can push more air and improve the coupling degree between the sound film body and the air, thereby improving the electroacoustic conversion efficiency and sound pressure level of the sound film structure of the embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention is further described in detail below based on the accompanying drawings and embodiments.

[0026] Figure 1A top view of the structural cross-section of the sound membrane structure provided in one embodiment of the present invention.

[0027] Figure 2 A top-down exploded structural cross-sectional view of a sound membrane structure provided in one embodiment of the present invention.

[0028] Figure 3 A top view of the structural cross-section of a sound membrane structure provided in another embodiment of the present invention.

[0029] Figure 4 A top view of the structural cross-section of a sound membrane structure provided in yet another embodiment of the present invention.

[0030] Figure 5 This is a schematic diagram of the front view of the sound membrane structure provided in one embodiment of the present invention.

[0031] Figure 6 A schematic structural diagram of a loudspeaker provided in one embodiment of the present invention.

[0032] Figure 7 A schematic cross-sectional view of a loudspeaker provided in one embodiment of the present invention.

[0033] Figure 8 A top view of the structure of a sound membrane structure provided in yet another embodiment of the present invention.

[0034] Fig. 9 A top view of the structural cross-section of a sound membrane structure provided in yet another embodiment of the present invention.

[0035] Fig.10 A schematic front view of the structure of a sound membrane provided in another embodiment of the present invention.

[0036] Fig.11 A schematic structural diagram of a speaker provided in another embodiment of the present invention.

[0037] In the figure:

[0038] 1. Sound diaphragm structure; 11. Sound diaphragm member; 111. Sound diaphragm body; 1111. First side surface; 1112. Second side surface; 1113. First countersunk hole; 1114. Second countersunk hole; 112. First magnetic circuit; 1121. First permanent magnet; 1122. First magnetic bowl; 1123. First magnetic plate; 113. Second magnetic circuit; 1131. Second permanent magnet; 1132. Second magnetic bowl; 1133. Second magnetic plate; 12. First coil body; 121. First groove; 13. Second coil body; 131. Second groove; 14. Fixing plate; 15. First cover plate; 16. Second cover plate; 17. Elastic material layer; 171. Bending structure; 2. Casing. DETAILED DESCRIPTION

[0039] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

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

[0041] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] refer to Figure 1 The embodiment of the present invention provides a sound membrane structure 1, comprising at least two sound membrane members 11, at least two first coil bodies 12 and at least two second coil bodies 13, the sound membrane member 11 comprises a sound membrane body 111, a first magnetic circuit 112 and a second magnetic circuit 113, the sound membrane body 111 comprises a first side surface 1111 and a second side surface 1112 arranged opposite to each other, the first magnetic circuit 112 is fixedly arranged with the first side surface 1111, the second magnetic circuit 113 is fixedly arranged with the second side surface 1112, the two adjacent sound membrane members 11 are symmetrically laid flat, and the sound membrane body The plane of 111 is perpendicular to the flattening direction of the sound membrane 11, and the sound membrane body 111 is arranged between the first coil body 12 and the second coil body 13. The first coil body 12 and the second coil body 13 are fixedly arranged. The groove of the first magnetic circuit 112 accommodates the end of the first coil body 12, and the groove of the second magnetic circuit 113 accommodates the end of the second coil body 13. The first magnetic circuit 112 can approach or move away from the first coil body 12, and the second magnetic circuit 113 can approach or move away from the second coil body 13, so that the sound membrane body 111 vibrates and makes sound.

[0043] The embodiment of the present invention forms a sound membrane structure 1 by setting at least two sound membrane parts 11, at least two first coil bodies 12 and at least two second coil bodies 13, wherein the sound membrane part 11 includes a sound membrane body 111, a first magnetic circuit 112 and a second magnetic circuit 113, the sound membrane body 111 includes a first side surface 1111 and a second side surface 1112 which are arranged opposite to each other, the first magnetic circuit 112 is fixedly arranged with the first side surface 1111, and the second magnetic circuit 113 is fixedly arranged with the second side surface 1112, and two adjacent sound membrane parts 11 are symmetrically laid out, so that the sound membrane bodies 111 of the two sound membrane parts 11 can be symmetrically and parallelly arranged, and the plane of the sound membrane body 111 is perpendicular to the laying direction of the sound membrane part 11, under the same laying area, more sound membrane parts 11 can be arranged, and the occupied volume of the sound membrane structure 1 of the embodiment of the present invention can be reduced.

[0044] Furthermore, the sound membrane body 111 is arranged between the first coil body 12 and the second coil body 13, the first coil body 12 and the second coil body 13 are fixedly arranged, the groove of the first magnetic circuit 112 accommodates the end of the first coil body 12, and the groove of the second magnetic circuit 113 accommodates the end of the second coil body 13. When a current corresponding to the audio information is passed through the first coil body 12 or the second coil body 13, that is, when a current signal changes continuously and rapidly, since the first magnetic circuit 112 and the second magnetic circuit 113 are permanent magnets, a Lorentz force corresponding to the current magnitude is generated when the current passed through the first coil body 12 cuts the magnetic flux lines of the first magnetic circuit 112, so that the first magnetic circuit 112, driven by the Lorentz force, can move closer to or farther away from the first coil body 12, thereby driving the sound membrane body 111 fixedly set with the first magnetic circuit 112 to vibrate and make sound; similarly, the current passed through the second coil body 13 can also cut the magnetic flux lines of the second magnetic circuit 113 and generate a Lorentz force corresponding to the current magnitude, which can also drive the second magnetic circuit 113 closer to or farther away from the second coil body 13, and can also drive the sound membrane body 111 fixedly set with the second magnetic circuit 113 to vibrate and make sound.

[0045] In addition, when the same current is passed through each first coil body 12 or second coil body 13, the sound membrane body 111 connected to each first magnetic circuit 112 or second magnetic circuit 113 can be driven to vibrate in the same manner at the same time. The two adjacent sound membrane parts 11 are symmetrically laid out, so that the two adjacent sound membrane parts 111 can simultaneously make symmetrical relative movements, which can be understood as the two adjacent sound membrane parts 111 moving toward or away from each other, so that the load of the sound membrane body 111 on the air is doubled. Moreover, the plane of the sound membrane body 111 is perpendicular to the laid surface of the sound membrane part 11. Under the same laid area, the surface area of ​​the sound membrane body 111 of the embodiment of the present invention is greater than the surface area of ​​the sound membrane in the prior art, which can push more air and improve the coupling degree between the sound membrane body 111 and the air, thereby improving the electroacoustic conversion efficiency and sound pressure level of the sound membrane structure 1 of the embodiment of the present invention.

[0046] In particular, refer to Figure 3 The sound membrane structure 1 of the embodiment of the present invention further includes a fixing plate 14 arranged in parallel with the sound membrane body 111, and the fixing plate 14 is fixedly arranged between two adjacent first coil bodies 12, or, the fixing plate 14 is fixedly arranged between two adjacent second coil bodies 13, or, the fixing plate 14 is fixedly arranged between two adjacent first coil bodies 12 and between two adjacent second coil bodies 13, and the first coil body 12 or the second coil body 13 is fixedly arranged on the fixing plate 14. In this embodiment, the first coil body 12 or the second coil body 13 is fixed by setting the fixing plate 14, which can reduce the movement of the first coil body 12 or the second coil body 13, so that the Lorentz force generated by the first coil body 12 or the second coil body 13 acts more on the first magnetic circuit 112 or the second magnetic circuit 113, thereby maintaining the electroacoustic conversion efficiency and sound pressure level of the sound membrane body 111 fixedly arranged with the first magnetic circuit 112 and the second magnetic circuit 113.

[0047] In one embodiment, reference Figure 2 The first side surface 1111 is provided with a first countersunk hole 1113, and the first countersunk hole 1113 can accommodate the first magnetic circuit 112. The second side surface 1112 is provided with a second countersunk hole 1114, and the second countersunk hole 1114 can accommodate the second magnetic circuit 113. This embodiment uses the thickness of the sound membrane body 111 itself to set the first magnetic circuit 112 and the second magnetic circuit 113 in the first countersunk hole 1113 and the second countersunk hole 1114. While keeping the driving force of the first magnetic circuit 112 and the second magnetic circuit 113 on the sound membrane body 111 unchanged and the sound pressure level of the sound membrane body 111 unchanged, it also further reduces the overall occupied volume of the first magnetic circuit 112, the second magnetic circuit 113 and the sound membrane body 111, which can further reduce the sound membrane structure 1 of the embodiment of the present invention.

[0048] Optionally, refer to Figure 2 , the first magnetic circuit 112 includes a first permanent magnet 1121, a first magnetic bowl 1122 and a first magnetic plate 1123, the first permanent magnet 1121 is arranged in the groove of the first magnetic bowl 1122, the first magnetic plate 1123 is arranged on the side of the first permanent magnet 1121 away from the first magnetic bowl 1122, the first coil body 12 is provided with a first groove 121, the first groove 121 can accommodate the first permanent magnet 1121, the first coil body 12 is limited by the groove on the first magnetic bowl 1122 and the first permanent magnet 1121, which can further reduce the movement of the first magnetic circuit 112 relative to the first coil body 12, so that the vibration of the sound film body 111 is more stable, and the sound emitted is more stable and balanced. In this embodiment, the first magnetic bowl 1122 and the first magnetic plate 1123 can change the magnetic field direction of the two poles of the first permanent magnet 1121, and also avoid reducing the magnetic flux of the first permanent magnet 1121.

[0049] Similarly, the second magnetic circuit 113 includes a second permanent magnet 1131, a second magnetic bowl 1132 and a second magnetic plate 1133. The second permanent magnet 1131 is arranged in the groove of the second magnetic bowl 1132, and the second magnetic plate 1133 is arranged on the side of the second permanent magnet 1131 away from the second magnetic bowl 1132. The second coil body 13 is provided with a second groove 131, and the second groove 131 can accommodate the second permanent magnet 1131. It can also change the direction of the magnetic field of the two poles of the second permanent magnet 1131, so as to make the vibration of the sound membrane body 111 more stable and the sound emitted more stable and balanced.

[0050] In another embodiment, reference Figure 3 , the number of the first magnetic circuits 112 on a sound membrane 11 is at least two, the second magnetic circuit 113 is arranged between the two first magnetic circuits 112, the number of the first coil bodies 12 is at least two, and the second coil body 13 is arranged between the two first coil bodies 12. When the second coil body 13 drives the second magnetic circuit 113 away from the second coil body 13, the middle part of the sound membrane body 111 can be driven to move away from the second coil body 13, and when the first coil body 12 drives the first magnetic circuit 112 away from the first coil body 12, the two ends of the middle part of the sound membrane body 111 can be driven to move away from the first coil body 12, that is, the middle part of the sound membrane body 111 is driven to move closer to the second coil, so that the movement of the middle part of the sound membrane body 111 tends to be balanced, which can extend the service life of the sound membrane body 111 and also help to enhance the sound level of the sound membrane body 111. When current signals with continuously changing magnitude and direction are respectively supplied to the first coil body 12 and the second coil body 13 , the sound membrane body 111 can be driven to emit a more balanced and powerful sound.

[0051] Preferably, the sound membrane members 11 are arranged and laid flat in the same direction, and can be arranged into a plurality of combined sound membrane structures 1 of different sizes according to actual use requirements, which can emit sound pressure levels of different sizes.

[0052] In the propagation properties of sound, sound has different propagation properties in different propagation structures, and the sound propagation effect can be changed by changing the sound propagation structure inside the sound membrane structure 1. For example, refer to Figure 5 The sound membrane structure 1 of the embodiment of the present invention also includes a first cover plate 15 vertically arranged with the sound membrane body 111. The first cover plate 15 is arranged on one side of the sound membrane member 11. The first cover plate 15 is used to cover the gap between every two sound membrane bodies 111. The sound membrane body 111 and the first cover plate 15 are spaced apart, so that the sound waves emitted by the sound membrane member 11 are reflected back into the cavity between the two sound membrane members 11 when passing through the plane of the first cover plate 15, and can be superimposed to enhance the sound pressure level of the sound waves. The enhanced sound waves are then emitted from the gap between the sound membrane member 11 and the first cover plate 15.

[0053] Further, continue to refer to Figure 5 The sound membrane structure 1 of the embodiment of the present invention further includes a second cover plate 16 arranged in parallel with the first cover plate 15, and the second cover plate 16 is arranged on the other side of the sound membrane member 11. The first cover plate 15 is used to cover the gap between every two sound membrane bodies 111, and the second cover plate 16 is opposite to the gap between the two first cover plates 15, so that the first cover plate 15 and the second cover plate 16 are alternately arranged on both sides of the sound membrane member 11, so that in the cavity between the two sound membrane members 11, one side of the cavity is covered by the first cover plate 15 or the second cover plate 16, and the other side can be connected to the air, so that the sound membrane body 111 is in contact with sufficient air. In addition, the sound membrane structure 1 of the embodiment of the present invention can emit sound in multiple directions, which expands the sound wave radiation area and radiation range of the sound membrane structure 1.

[0054] Optionally, when two adjacent sound membrane bodies 111 move away from each other at the same time, a larger cavity is formed between the two sound membrane bodies 111 to guide external air in, and when the two sound membrane bodies 111 move closer to each other again, the air in the cavity is squeezed out, which can enhance the load of the sound membrane structure 1 of the embodiment of the present invention on the air.

[0055] In particular, refer to Figure 4 , an elastic material layer 17 is fixedly provided at the end of the sound membrane body 111 in the length direction, and the elastic material layer 17 is fixedly provided away from the end of the sound membrane body 111. Since the sound membrane body 111 is continuously driven by the excitation of the first magnetic circuit 112 or the second magnetic circuit 113, the sound membrane structure 1 of this embodiment belongs to a forced vibration system, and the elastic material layer 17 is provided at the end of the sound membrane body 111 in the length direction, which can absorb and reduce the amplitude of the sound membrane body 111 during resonance, and avoid the sound membrane body 111 from being damaged due to excessive resonance amplitude, thereby extending the service life of the sound membrane body 111. In addition, the elastic material layer 17 can also increase the vibration amplitude at both ends of the sound membrane body 111, and reduce the vibration restriction of the middle part of the sound membrane body 111 by the two ends of the sound membrane body 111.

[0056] Preferably, continue to refer to Figure 4 The elastic material layer 17 is provided with a bending structure 171, which can further increase the deformation amplitude of the elastic material layer 17, increase the vibration distance of the sound membrane body 111, and reduce the amplitude limitation of the vibration of the sound membrane body 111 driven by the first magnetic circuit 112 or the second magnetic circuit 113.

[0057] refer to Figure 6 and Figure 7The embodiment of the present invention further provides a loudspeaker, comprising a housing 2 and a sound membrane structure 1 of any of the above embodiments, wherein both ends of the length of the sound membrane body 111 of the sound membrane structure 1 are fixedly arranged on the housing 2, and the first coil body 12 and the second coil body 13 are fixedly arranged with the housing 2. The sound membrane structure 1 in this embodiment can have the same structure and achieve the same effect as the sound membrane structure 1 in the above embodiment, and will not be described in detail in this embodiment.

[0058] In one embodiment, the gap between the outer shell 2 and the sound membrane 111 is d, and the range of d can be 0mm<d≤0.1mm, which ensures that the speaker is not invaded by foreign objects with a diameter of more than 0.1mm, while retaining the gap for air inlet and outlet, thereby increasing the air load rate inside the speaker, increasing the sound volume, and preventing the vibration amplitude of the sound membrane 111 from being limited by the outer shell 2 when it vibrates.

[0059] In particular, the speaker of the embodiment of the present invention can adopt a high-precision manufacturing process or a MEMS (Micro-Electro-Mechanical System, which refers to a high-tech device with a size of several millimeters or even smaller, and its internal structure is generally at the micron or even nanometer level, and it is an independent intelligent system) manufacturing process, so the speaker has high manufacturing accuracy and good consistency.

[0060] On the other hand, reference Figure 8 The embodiment of the present invention further provides a sound membrane structure 1, comprising at least two sound membrane members 11, at least two first magnetic circuits 112 and at least two second magnetic circuits 113, the sound membrane member 11 comprises a sound membrane body 111, a first coil body 12 and a second coil body 13, the sound membrane body 111 comprises a first side surface 1111 and a second side surface 1112 arranged opposite to each other, the first coil body 12 is fixedly arranged with the first side surface 1111, the second coil body 13 is fixedly arranged with the second side surface 1112, the two adjacent sound membrane members 11 are symmetrically laid flat, and the sound membrane The plane of the body 111 is perpendicular to the flattening direction of the sound membrane body 11, and the sound membrane body 111 is arranged between the first magnetic circuit 112 and the second magnetic circuit 113. The first magnetic circuit 112 and the second magnetic circuit 113 are fixedly arranged. The groove of the first magnetic circuit 112 accommodates the end of the first coil body 12, and the groove of the second magnetic circuit 113 accommodates the end of the second coil body 13. The first coil body 12 can be close to or away from the first magnetic circuit 112, and the second coil body 13 can be close to or away from the second magnetic circuit 113, so that the sound membrane body 111 vibrates and makes sound.

[0061] The diaphragm structure 1 of this embodiment can also be provided with more diaphragm parts 11 under the same flattening area, which can reduce the occupied volume of the diaphragm structure 1 of the embodiment of the present invention. Furthermore, the diaphragm body 111 is arranged between the first magnetic circuit 112 and the second magnetic circuit 113. The first magnetic circuit 112 and the second magnetic circuit 113 are fixedly arranged. The groove of the first magnetic circuit 112 accommodates the end of the first coil body 12, and the groove of the second magnetic circuit 113 accommodates the end of the second coil body 13. When the current corresponding to the audio information is passed through the first coil body 12 or the second coil body 13, since the first magnetic circuit 112 and the second magnetic circuit 113 are permanent magnets, the current passed through the first coil body 12 cuts the magnetic flux lines of the first magnetic circuit 112 to generate The Lorentz force of the corresponding current size enables the first coil body 12 to move closer to or farther away from the first magnetic circuit 112 under the drive of the Lorentz force, thereby driving the sound membrane body 111 fixedly set with the first coil body 12 to vibrate and make sound; similarly, the current passed into the second coil body 13 can also cut the magnetic lines of force of the second magnetic circuit 113 and generate a Lorentz force of the corresponding current size, which can also drive the second coil body 13 to move closer to or farther away from the second magnetic circuit 113, and can also drive the sound membrane body 111 fixedly set with the second coil body 13 to vibrate and make sound.

[0062] In addition, when the same current is passed through each first coil body 12 or second coil body 13, the sound membrane body 111 connected to each first coil body 12 or second coil body 13 can be driven to vibrate in the same manner at the same time. The two adjacent sound membrane parts 11 are symmetrically laid out, so that the two adjacent sound membrane parts 111 can simultaneously make symmetrical relative movements, which can be understood as the two adjacent sound membrane parts 111 moving toward or away from each other, so that the load of the sound membrane body 111 on the air is doubled. Moreover, the plane of the sound membrane body 111 is perpendicular to the laid surface of the sound membrane part 11. Under the same laid area, the surface area of ​​the sound membrane body 111 of the embodiment of the present invention is greater than the surface area of ​​the sound membrane in the prior art, which can push more air and improve the coupling degree between the sound membrane body 111 and the air, thereby improving the electroacoustic conversion efficiency and sound pressure level of the sound membrane structure 1 of the embodiment of the present invention.

[0063] As a preferred solution of the sound membrane structure 1, refer to Fig. 9The diaphragm structure 1 of the embodiment of the present invention further includes a fixing plate 14 arranged in parallel with the diaphragm body 111, the fixing plate 14 is fixedly arranged between two adjacent first magnetic circuits 112, or the fixing plate 14 is fixedly arranged between two adjacent second magnetic circuits 113, or the fixing plate 14 is fixedly arranged between two adjacent first magnetic circuits 112 and between two adjacent second magnetic circuits 113, and the first magnetic circuit 112 or the second magnetic circuit 113 is fixedly arranged on the fixing plate 14. In this embodiment, the first magnetic circuit 112 or the second magnetic circuit 113 is fixed by setting the fixing plate 14, so that the movement of the first magnetic circuit 112 or the second magnetic circuit 113 can be reduced, so that the Lorentz force generated by the first coil body 12 or the second coil body 13 acts more on itself, thereby maintaining the electroacoustic conversion efficiency and sound pressure level of the diaphragm body 111.

[0064] As another preferred embodiment of the sound membrane structure 1, refer to Fig.10 The sound diaphragm structure 1 of the embodiment of the present invention further includes a first cover plate 15 vertically arranged with the sound diaphragm body 111. The first cover plate 15 is arranged on one side of the sound diaphragm member 11. The first cover plate 15 is used to cover the gap between every two sound diaphragm bodies 111. The sound diaphragm body 111 is spaced apart from the first cover plate 15. When the sound waves emitted by the sound diaphragm member 11 pass through the plane of the first cover plate 15, they are reflected back into the cavity between the two sound diaphragm members 11, and the sound pressure level of the sound waves can be superimposed and enhanced. The enhanced sound waves are then emitted from the gap between the sound diaphragm member 11 and the first cover plate 15.

[0065] Further, refer to Fig.10 The sound membrane structure 1 of the embodiment of the present invention further includes a second cover plate 16 arranged in parallel with the first cover plate 15. The second cover plate 16 is arranged on the other side of the sound membrane member 11. The first cover plate 15 is used to cover the gap between every two sound membrane bodies 111, and the second cover plate 16 is directly opposite to the gap between the two first cover plates 15. The first cover plate 15 and the second cover plate 16 are arranged alternately on both sides of the sound membrane member 11, so that in the cavity between the two sound membrane members 11, one side of the cavity is covered by the first cover plate 15 or the second cover plate 16, and the other side can be connected to the air, so that the sound membrane body 111 is in contact with sufficient air. In addition, the sound membrane structure 1 of the embodiment of the present invention can emit sound in multiple directions, which expands the sound wave radiation area and radiation range of the sound membrane structure 1.

[0066] As a preferred solution of the sound membrane structure 1, the sound membrane structure 1 of the embodiment of the present invention also includes a sub-diaphragm body (not shown in the figure) arranged in parallel with the sound membrane body 111, and the sub-diaphragm body is fixedly arranged between two adjacent first magnetic circuits 112, or, the sub-diaphragm body is fixedly arranged between two adjacent second magnetic circuits 113, or, the sub-diaphragm body is fixedly arranged between two adjacent first magnetic circuits 112 and two adjacent second magnetic circuits 113, and the first magnetic circuit 112 or the second magnetic circuit 113 is fixedly arranged on the sub-diaphragm body. In this embodiment, the first magnetic circuit 112 or the second magnetic circuit 113 is fixed by arranging a sub-diaphragm body, and the sub-diaphragm body can also assist in vibration, and is thinner and lighter, which is conducive to reducing the volume and weight of the sound membrane structure 1 of the embodiment of the present invention.

[0067] On the other hand, refer to Fig.11 The embodiment of the present invention also provides a loudspeaker, including a housing 2 and a sound membrane structure 1, wherein both ends of the length of the sound membrane body 111 of the sound membrane structure 1 are fixedly arranged on the housing 2, and the first magnetic circuit 112 and the second magnetic circuit 113 are fixedly arranged on the housing 2. The sound membrane structure 1 in this embodiment can have the same structure and achieve the same effect as the sound membrane structure 1 in the above embodiment, and will not be described in detail in this embodiment.

[0068] In the description of this article, it should be understood that the terms "upper", "lower", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used to distinguish in the description and have no special meaning.

[0069] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0070] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0071] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. A sound membrane structure, characterized in that: It includes at least two sound membrane parts, at least two first coil bodies and at least two second coil bodies, the sound membrane part includes a sound membrane body, a first magnetic circuit and a second magnetic circuit, the sound membrane body includes a first side surface and a second side surface that are arranged opposite to each other, the first magnetic circuit is fixedly arranged with the first side surface, the second magnetic circuit is fixedly arranged with the second side surface, two adjacent sound membrane parts are symmetrically laid out, the plane of the sound membrane body is perpendicular to the laying direction of the sound membrane part, the sound membrane body is arranged between the first coil body and the second coil body, the first coil body and the second coil body are fixedly arranged, the groove of the first magnetic circuit accommodates the end of the first coil body, the groove of the second magnetic circuit accommodates the end of the second coil body, the first magnetic circuit can be close to or away from the first coil body, and the second magnetic circuit can be close to or away from the second coil body, so that the sound membrane body vibrates and makes sound.

2. The sound membrane structure according to claim 1, characterized in that: It also includes a fixing plate arranged parallel to the sound membrane body, the fixing plate is fixedly arranged between two adjacent first coil bodies, and / or the fixing plate is fixedly arranged between two adjacent second coil bodies, and the first coil body or the second coil body is fixedly arranged on the fixing plate.

3. The sound membrane structure according to claim 1, characterized in that: The first side surface is provided with a first countersunk hole, and the first countersunk hole can accommodate the first magnetic circuit. The second side surface is provided with a second countersunk hole, and the second countersunk hole can accommodate the second magnetic circuit.

4. The sound membrane structure according to claim 1, characterized in that: The first magnetic circuit includes a first permanent magnet, a first magnetic bowl and a first magnetic plate, the first permanent magnet is arranged in a groove of the first magnetic bowl, the first magnetic plate is arranged on the side of the first permanent magnet facing away from the first magnetic bowl, the first coil body is provided with a first groove, and the first groove can accommodate the first permanent magnet, the second magnetic circuit includes a second permanent magnet, a second magnetic bowl and a second magnetic plate, the second permanent magnet is arranged in the groove of the second magnetic bowl, the second magnetic plate is arranged on the side of the second permanent magnet facing away from the second magnetic bowl, and the second coil body is provided with a second groove, and the second groove can accommodate the second permanent magnet.

5. The sound membrane structure according to claim 1, characterized in that: The number of the first magnetic circuits on one of the diaphragm members is at least two, the second magnetic circuit is arranged between two of the first magnetic circuits, the number of the first coil bodies is at least two, and the second coil body is arranged between two of the first coil bodies.

6. The sound membrane structure according to claim 1, characterized in that: It also includes a first cover plate vertically arranged with respect to the sound membrane body, the first cover plate is arranged on one side of the sound membrane member, the first cover plate is used to cover the gap between every two sound membrane bodies, and the sound membrane body is spaced apart from the first cover plate.

7. The sound membrane structure according to claim 6, characterized in that: It also includes a second cover plate arranged parallel to the first cover plate, the second cover plate is arranged on the other side of the sound membrane member, the first cover plate is used to cover the gap between every two of the sound membrane bodies, and the second cover plate is opposite to the gap between the two first cover plates.

8. The sound membrane structure according to claim 1, characterized in that: An elastic material layer is fixedly disposed at the end of the sound membrane body in the length direction, and the elastic material layer is fixedly disposed away from the end of the sound membrane body.

9. A loudspeaker, characterized in that: It comprises a shell and the sound membrane structure according to any one of claims 1 to 8, wherein both ends of the length of the sound membrane body of the sound membrane structure are fixedly arranged on the shell, and the first coil body and the second coil body are fixedly arranged on the shell.

10. A sound membrane structure, characterized in that: It includes at least two sound membrane parts, at least two first magnetic circuits and at least two second magnetic circuits, the sound membrane part includes a sound membrane body, a first coil body and a second coil body, the sound membrane body includes a first side surface and a second side surface which are arranged opposite to each other, the first coil body is fixedly arranged with the first side surface, the second coil body is fixedly arranged with the second side surface, two adjacent sound membrane parts are symmetrically laid out, the plane of the sound membrane body is perpendicular to the laying direction of the sound membrane part, the sound membrane body is arranged between the first magnetic circuit and the second magnetic circuit, the first magnetic circuit and the second magnetic circuit are fixedly arranged, the groove of the first magnetic circuit accommodates the end of the first coil body, the groove of the second magnetic circuit accommodates the end of the second coil body, the first coil body can be close to or away from the first magnetic circuit, and the second coil body can be close to or away from the second magnetic circuit, so that the sound membrane body vibrates and makes sound.

11. The sound membrane structure according to claim 10, characterized in that: It also includes a fixing plate arranged parallel to the sound membrane body, the fixing plate is fixedly arranged between two adjacent first magnetic circuits, and / or the fixing plate is fixedly arranged between two adjacent second magnetic circuits, and the first magnetic circuit or the second magnetic circuit is fixedly arranged on the fixing plate.

12. The sound membrane structure according to claim 10, characterized in that: It also includes a first cover plate vertically arranged with respect to the sound membrane body, the first cover plate is arranged on one side of the sound membrane member, the first cover plate is used to cover the gap between every two sound membrane bodies, and the sound membrane body is spaced apart from the first cover plate.

13. The sound membrane structure according to claim 12, characterized in that: It also includes a second cover plate arranged parallel to the first cover plate, the second cover plate is arranged on the other side of the sound membrane member, the first cover plate is used to cover the gap between every two of the sound membrane bodies, and the second cover plate is opposite to the gap between the two first cover plates.

14. The sound membrane structure according to claim 10, characterized in that: It also includes a consonant membrane body arranged parallel to the sound membrane body, the consonant membrane body is fixedly arranged between two adjacent first magnetic circuits, and / or the consonant membrane body is fixedly arranged between two adjacent second magnetic circuits, and the first magnetic circuit or the second magnetic circuit is fixedly arranged on the consonant membrane body.

15. A speaker, characterized in that: It comprises a shell and the sound membrane structure according to any one of claims 10 to 14, wherein both ends of the length of the sound membrane body of the sound membrane structure are fixedly arranged on the shell, and the first magnetic circuit and the second magnetic circuit are fixedly arranged on the shell.

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