Speaker and audio reproduction device

Abstract

The present invention provides a loudspeaker, comprising: a diaphragm, a first driving member, a second driving member, a first coil and a second coil; a first driving member and a first coil are provided on a first side of the diaphragm, and the second coil and the second driving member are provided on a second side of the diaphragm; the first coil is disposed around the outer periphery of the first driving member, and the second driving member is disposed around the outer periphery of the second coil; if the first coil and the second coil are energized, the diaphragm is magnetized and vibrates to generate sound under the drive of the first driving member and the second driving member; the orthographic projection of the first driving member on the diaphragm does not coincide with the orthographic projection of the second driving member on the diaphragm, and the magnetic force regions applied to the diaphragm between the first driving member and the second driving member are evenly distributed to improve the sensitivity of the diaphragm. The present invention also provides an audio reproduction device provided with the loudspeaker.

Description

Technical Field

[0001] The present invention relates to the field of electronic devices, and in particular to a loudspeaker and an audio reproduction device provided with the loudspeaker. Background Art

[0002] Existing balanced diaphragm loudspeakers include two symmetrically arranged magnetic driving members and a diaphragm. The diaphragm is magnetized by the energized coils on both sides and is driven by the magnetic driving members to vibrate and generate sound. Since the diaphragm is directly stressed after magnetization and there is no transmission delay, the balanced diaphragm unit has good high-frequency transient and extension characteristics. However, in existing balanced diaphragm loudspeakers, the diaphragm is unevenly stressed, resulting in poor sensitivity of the balanced diaphragm unit. Summary of the Invention

[0003] An object of the present invention is to provide a loudspeaker with a uniformly stressed planar diaphragm and an audio reproduction device provided with the loudspeaker.

[0004] To solve the above technical problems, the present invention provides a loudspeaker, comprising: a diaphragm, a first driving member, a second driving member, a first coil, and a second coil; the first side of the diaphragm is provided with the first driving member and the first coil, and the second side of the diaphragm is provided with the second coil and the second driving member; the first coil is disposed around the outer periphery of the first driving member, and the second driving member is disposed around the outer periphery of the second coil; if the first coil and the second coil are energized, the diaphragm is magnetized and vibrates and generates sound under the drive of the first driving member and the second driving member.

[0005] The present invention further provides an audio reproduction device, comprising a housing and a loudspeaker. The housing includes an inner cavity and a sound outlet channel communicating with the inner cavity. The loudspeaker is disposed in the inner cavity of the housing, and the sound outlet hole of the loudspeaker communicates with the sound outlet channel.

[0006] The first coil of the loudspeaker of the present invention is sleeved around the outer periphery of the first driving member, and the second driving member is sleeved around the outer periphery of the second coil. Therefore, the first driving member and the second driving member are asymmetric, that is, the orthographic projection of the first driving member on the diaphragm does not coincide with the orthographic projection of the second driving member on the diaphragm; when the first coil and the second coil are energized, the diaphragm is uniformly and quickly magnetized, and the first driving member and the second driving member directly apply magnetic force to the magnetized diaphragm, without transmission loss and transmission delay, resulting in good high-frequency transient and extension; secondly, the magnetic force regions applied to the diaphragm between the first driving member and the second driving member are evenly distributed, so that the stress distribution of the diaphragm between the first driving member and the second driving member is uniform, so as to improve the sensitivity of the diaphragm, make the diaphragm easier to be driven to vibrate the air and generate sound, output a higher sound pressure, and the tone is high-frequency and mellow. Description of the Drawings

[0007] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the implementation will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0008] Figure 1 It is a schematic diagram of the three-dimensional structure of the speaker in the first embodiment of the present invention;

[0009] Figure 2 is Figure 1 a schematic diagram of the three-dimensional structure of the speaker in another perspective in

[0010] Figure 3 is Figure 1 a cross-sectional view along line III-III in

[0011] Figure 4 is Figure 1 a schematic diagram of the exploded three-dimensional structure of the speaker in

[0012] Figure 5 is Figure 4 a schematic diagram of the three-dimensional structure of the speaker in another perspective in

[0013] Figure 6 It is a schematic diagram of the three-dimensional structure of the audio reproduction device in one of the embodiments of the present invention;

[0014] Figure 7 It is a schematic cross-sectional structure diagram of the speaker in the second embodiment of the present invention;

[0015] Figure 8 It is a schematic cross-sectional structure diagram of the speaker in the third embodiment of the present invention;

[0016] Figure 9 It is a schematic cross-sectional structure diagram of the speaker in the fourth embodiment of the present invention;

[0017] Figure 10 It is a schematic cross-sectional structure diagram of the speaker in the fifth embodiment of the present invention. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0019] In addition, the descriptions of the following embodiments refer to the attached drawings for illustrating specific embodiments in which the present invention can be implemented. Directional terms mentioned in the present invention, such as "top", "bottom", "front", "rear", "left", "right", "inner", "outer", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer illustration and understanding of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Thus, it should not be construed as a limitation to the present invention.

[0020] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "disposed on" 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; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] Please refer to Figure 1 - Figure 3 , Figure 1 is a schematic diagram of the three-dimensional structure of the speaker 100 according to the first embodiment of the present invention; Figure 2 is Figure 1 a schematic diagram of the three-dimensional structure of another perspective of the speaker 100 in Figure 3 is Figure 1Cross-sectional view along line III-III. The loudspeaker 100 in the first embodiment of the present invention includes a diaphragm assembly 20, a magnetic driving assembly 30, and a coil assembly 50. The diaphragm assembly 20 includes a diaphragm 21. The magnetic driving assembly 30 includes a first driving member 31 and a second driving member 33. The coil assembly 50 includes a first coil 51 and a second coil 53. The first driving member 31 is disposed on the first side of the diaphragm 21, and the first coil 51 is disposed around the outer periphery of the first driving member 31, that is, the first driving member 31 and the first coil 51 are provided on the first side of the diaphragm 21. The second coil 53 is disposed on the second side of the diaphragm 21, and the second driving member 33 is disposed around the outer periphery of the second coil 53, that is, the second coil 53 and the second driving member 33 are provided on the second side of the diaphragm 21. In this embodiment, the first coil 51 is sleeved around the outer periphery of the first driving member 31, the second driving member 33 is sleeved around the outer periphery of the second coil 53. The orthographic projection of the first driving member 31 on the diaphragm 21 is located in the middle of the diaphragm 21, and the orthographic projection of the second driving member 33 on the diaphragm 21 is located around the diaphragm 21. The orthographic projection of the second coil 53 on the diaphragm 21 is located in the middle of the diaphragm 21, and the orthographic projection of the first coil 51 on the diaphragm 21 is located around the diaphragm 21. If the first coil 51 and the second coil 53 are energized, the diaphragm 21 is magnetized and vibrates to generate sound under the drive of the first driving member 31 and the second driving member 33.

[0022] In this embodiment, the diaphragm 21 is a planar diaphragm, and the planar diaphragm can be, but is not limited to, a superconducting magnetic amorphous ultra-thin alloy flat film, a multi-layer composite film. The diaphragm 21 can also be made of a polymer material with good flexibility. Therefore, the timbre of the loudspeaker 100 is high-frequency mellow.

[0023] The loudspeaker 100 provided by the present invention includes a diaphragm 21, a first driving member 31 and a second driving member 33 located on opposite sides of the diaphragm 21, and a first coil 51 and a second coil 53 located on opposite sides of the diaphragm 21; the first coil 51 is disposed around the outer periphery of the first driving member 31, and the second driving member 33 is disposed around the outer periphery of the second coil 53. Therefore, the first driving member 31 and the second driving member 33 are not symmetric along the diaphragm 21, that is, the orthographic projection of the first driving member 31 on the diaphragm 21 does not coincide with the orthographic projection of the second driving member 33 on the diaphragm 21. Specifically, the orthographic projection of the first driving member 31 on the diaphragm 21 is located in the middle of the diaphragm 21, and the orthographic projection of the second driving member 33 on the diaphragm 21 is located around the diaphragm 21. When the first coil 51 and the second coil 53 are energized, the diaphragm 21 is uniformly and rapidly magnetized, and the first driving member 31 and the second driving member 33 directly apply magnetic force to the magnetized diaphragm 21, without transmission loss and transmission delay, so that the high-frequency transient and extension are better; secondly, the magnetic force regions applied to the diaphragm 21 between the first driving member 31 and the second driving member 33 are uniformly distributed, so that the force distribution on the diaphragm 21 between the first driving member 31 and the second driving member 33 is uniform, so as to improve the sensitivity of the diaphragm 21, make the diaphragm 21 easier to be driven to vibrate the air to generate sound, output a higher sound pressure, and the tone is high-frequency and mellow.

[0024] Such as Figure 3As shown, the center lines of the diaphragm 21, the first driving member 31, the second driving member 33, the first coil 51, and the second coil 53 are collinear as line L; this can not only magnetize the diaphragm 21 uniformly and quickly, but also make the driving force distribution of the first driving member 31 and the second driving member 33 on the diaphragm 21 more uniform. In this embodiment, the orthographic projection of the outer contour of the second coil 53 on the diaphragm 21 coincides with the orthographic projection of the outer contour of the first driving member 31 on the diaphragm 21, that is, the outer contour line of the orthographic projection of the second coil 53 on the diaphragm 21 coincides with the outer contour line of the orthographic projection of the first driving member 31 on the diaphragm 21; specifically, if the second coil 53 is a circular coil, then the first driving member 31 is also a cylinder, and the outer diameter value of the circular coil is equal to the outer diameter value of the cylinder; if the second coil 53 is a rectangular coil, then the first driving member 31 is a rectangular body, and the length and width of the outer contour of the rectangular coil are equal to the length and width of the outer contour of the rectangular body. The orthographic projection of the first coil 51 on the diaphragm 21 coincides with the orthographic projection of the second driving member 33 on the diaphragm 21, that is, the contour of the first coil 51 in the orthographic projection on the diaphragm 21 is the same as the contour of the second driving member 33 in the orthographic projection on the diaphragm 21; specifically, if the first coil 51 is a circular coil, then the second driving member 33 is also a toroid, and the outer diameter value and the inner diameter value of the circular coil are respectively equal to the outer diameter value and the inner diameter value of the toroid; if the first coil 51 is a rectangular coil, then the second driving member 33 is a rectangular toroid, and the length and width of the outer peripheral surface of the rectangular coil are equal to the length and width of the outer peripheral surface of the rectangular toroid. In this embodiment, the orthographic projection of the second coil 53 on the diaphragm 21 and the orthographic projection of the first driving member 31 on the diaphragm 21 are both located at the middle position of the diaphragm 21; the orthographic projection of the first coil 51 on the diaphragm 21 and the orthographic projection of the second driving member 33 on the diaphragm 21 are both located around the diaphragm 21; therefore, the first driving member 31 and the second driving member 33 can make the force distribution on the magnetized diaphragm 21 uniform, so as to improve the sensitivity of the diaphragm 21.

[0025] In other embodiments, the orthographic projection of the second coil 53 on the diaphragm 21 may be located within the orthographic projection of the first driving member 31 on the diaphragm 21, and the orthographic projection of the first coil 51 on the diaphragm 21 coincides with the orthographic projection of the second driving member 33 on the diaphragm 21; or the orthographic projection of the first coil 51 on the diaphragm 21 is located within the orthographic projection of the second driving member 33 on the diaphragm 21; or the orthographic projection of the second driving member 33 on the diaphragm 21 is located within the orthographic projection of the first coil 51 on the diaphragm 21; or the orthographic projection of the first coil 51 on the diaphragm 21 overlaps with the orthographic projection of the second driving member 33 on the diaphragm 21.

[0026] In other embodiments, the orthographic projection of the first driving member 31 on the diaphragm 21 may also be located within the orthographic projection of the second coil 53 on the diaphragm 21, and the orthographic projection of the first coil 51 on the diaphragm 21 coincides with the orthographic projection of the second driving member 33 on the diaphragm 21; or the orthographic projection of the first coil 51 on the diaphragm 21 is located within the orthographic projection of the second driving member 33 on the diaphragm 21; or the orthographic projection of the second driving member 33 on the diaphragm 21 is located within the orthographic projection of the first coil 51 on the diaphragm 21; or the orthographic projection of the first coil 51 on the diaphragm 21 overlaps with the orthographic projection of the second driving member 33 on the diaphragm 21.

[0027] Please refer to Figures 3 to 5 , Figure 4 is Figure 1 the exploded perspective view of the speaker 100 in Figure 5 is Figure 4 the perspective view of another angle of the speaker 100 in . In this embodiment, both the first coil 51 and the second coil 53 are circular coils, the first driving member 31 is a cylindrical magnet block, and the second driving member 33 is a circular magnet ring. The orthographic projection of the first driving member 31 on the diaphragm 21 is circular, the orthographic projection of the second coil 53 on the diaphragm 21 is annular, the circle and the annulus are both located in the middle of the diaphragm 21, and the periphery of the circle coincides with the outer periphery of the annulus, that is, the diameter value of the circle is equal to the outer diameter value of the annulus; the orthographic projections of the first coil 51 and the second driving member 33 on the diaphragm 21 are both annular, and the two annuli are both located around the diaphragm 21 and coincide, that is, the outer diameter values and the inner diameter values of the two annuli are equal.

[0028] Preferably, the sum of the areas of the orthographic projections of the first driving member 31 on the diaphragm 21 and the second driving member 33 on the diaphragm 21 is equal to the surface area of the diaphragm 21, further making the force distribution on the magnetized diaphragm 21 more uniform; the sum of the areas of the orthographic projections of the first coil 51 on the diaphragm 21 and the second coil 53 on the diaphragm 21 is equal to the surface area of the diaphragm 21, further making the magnetization of the diaphragm 21 more uniform.

[0029] As Figure 3 shown, the first driving member 31 and the first coil 51 are located on the first side of the diaphragm 21, and there is a first gap 211 between both the first driving member 31 and the first coil 51 and the diaphragm 21. The second driving member 33 and the second coil 53 are located on the second side of the diaphragm 21 opposite thereto, and there is a second gap 213 between both the second driving member 33 and the second coil 53 and the diaphragm 21. When the diaphragm 21 is magnetized by the second coil 53 and the first coil 51, the diaphragm 21 vibrates in the first gap 211 and the second gap 213 under the magnetic force drive between the first driving member 31 and the second driving member 33 to generate sound.

[0030] Further, the diaphragm 21 is circular in shape, and the axes of the first driving member 31, the second driving member 33, the second coil 53, the first coil 51 and the diaphragm 21 are collinear, that is, the axes of the first driving member 31, the second driving member 33, the second coil 53, the first coil 51 and the diaphragm 21 are their respective centerlines. The second driving member 33 is sleeved on the outer periphery of the second coil 53 such that the orthographic projections of the second driving member 33 and the second coil 53 on the diaphragm 21 do not overlap; the first coil 51 is sleeved on the outer periphery of the first driving member 31 such that the orthographic projections of the first driving member 31 and the first coil 51 on the diaphragm 21 do not overlap. The orthographic projections of the second driving member 33 and the second coil 53 on the diaphragm 21 are concentric, and the orthographic projections of the first driving member 31 and the first coil 51 on the diaphragm 21 are concentric. The orthographic projection area of the second driving member 33 on the diaphragm 21 corresponds to the orthographic projection area of the first coil 51 on the diaphragm 21, and the orthographic projection area of the first driving member 31 on the diaphragm 21 corresponds to the orthographic projection area of the second coil 53 on the diaphragm 21. The axial direction refers to the direction parallel to the axis of the second coil 53, and the axial direction is perpendicular to the top surface of the diaphragm 21; the top side refers to the side consistent with the orientation of the sound outlet hole of the speaker 100, and the bottom side refers to the side opposite to the orientation of the sound outlet hole of the speaker 100.

[0031] Preferably, the outer periphery of the orthographic projection of the second coil 53 on the diaphragm 21 coincides with the inner periphery of the orthographic projection of the second driving member 33 on the diaphragm 21, and the inner periphery of the orthographic projection of the first coil 51 on the diaphragm 21 coincides with the outer periphery of the orthographic projection of the first driving member 31 on the diaphragm 21.

[0032] In other embodiments, the outer periphery of the orthographic projection of the second coil 53 on the diaphragm 21 is spaced from the inner periphery of the orthographic projection of the second driving member 33 on the diaphragm 21, and the inner periphery of the orthographic projection of the first coil 51 on the diaphragm 21 is spaced from the outer periphery of the orthographic projection of the first driving member 31 on the diaphragm 21.

[0033] The loudspeaker 100 further includes a housing 60 for accommodating the diaphragm assembly 20, the magnetic driving assembly 30, and the coil assembly 50. The housing 60 is provided with a first sound outlet hole 61 in the axial direction. The second driving member 33 and the second coil 53 are closer to the side of the first sound outlet hole 61 than the first coil 51 and the first driving member 31, that is, the second driving member 33 and the second coil 53 are located on the top side of the diaphragm 21, and the first driving member 31 and the first coil 51 are located on the bottom side of the diaphragm 21; the inner cavity of the second coil 53 communicates with the first sound outlet hole 61. Preferably, the inner cavity of the second coil 53 surrounds the first sound outlet hole 61.

[0034] Specifically, the housing 60 includes a top plate 62 and a side wall 64 surrounding the edge of the top plate 62. The top plate 62 and the side wall 64 enclose a receiving space 65 for accommodating the diaphragm assembly 20, the magnetic driving assembly 30, and the coil assembly 50. The first sound outlet hole 61 is opened in the top plate 62, and the side wall 64 is provided with a wire groove 66 in the axial direction for accommodating a wire 55 electrically connected to the first coil 51 and the second coil 53. In this embodiment, the top plate 62 is a circular plate, and the first sound outlet hole 61 is located at the middle position of the circular plate; the side wall 64 is an annular structure surrounding the edge of the top plate 62.

[0035] Such as Figure 3 - Figure 5As shown, the diaphragm assembly 20 further includes a first washer 23 and a second washer 25. The first washer 23 and the second washer 25 are disposed on opposite sides of the diaphragm 21 to position the diaphragm 21. The first washer 23 is located within the first gap 211, and the second washer 25 is located within the second gap 213. The inner diameter values of the first washer 23 and the second washer 25 are both greater than the inner diameter value of the second driving member 33, and the outer diameter values of the first washer 23 and the second washer 25 are both less than or equal to the outer diameter value of the second driving member 33. In this embodiment, the diaphragm 21 is a circular diaphragm. The first washer 23 is attached to the bottom surface of the diaphragm 21 and surrounds the edge of the diaphragm 21. The second washer 25 is attached to the top surface of the diaphragm 21 and surrounds the edge of the diaphragm 21.

[0036] In this embodiment, the second coil 53 is received within the inner cavity of the second driving member 33. The second coil 53 surrounds the first sound outlet hole 61. The second coil 53 faces the middle region of the top surface of the diaphragm 21, and the second driving member 33 faces the peripheral region of the top surface of the diaphragm 21. The first coil 51 is sleeved outside the magnet block. The first driving member 31 faces the middle region of the bottom surface of the diaphragm 21, and the first coil 51 faces the peripheral region of the bottom surface of the diaphragm 21. The magnet block, the diaphragm 21, and the second coil 53 are coaxial. Since the diameter value of the magnet block is relatively large, the magnetic force of the magnet block is relatively large. And the magnet block faces the middle region of the diaphragm 21, while the second driving member 33 faces the peripheral region of the diaphragm 21. When the loudspeaker 100 operates, the magnetic forces applied by the first driving member 31 and the second driving member 33 to the magnetized diaphragm 21 are evenly distributed, and the magnetic forces are more distributed in the middle region of the diaphragm 21, with a larger torque, making it easier for the diaphragm 21 to be driven to vibrate. The vibration of the diaphragm 21 drives the air around it to vibrate and generate sound, so as to output a higher sound pressure.

[0037] Specifically, the second driving member 33 is sleeved outside the second coil 53 and laminated on the top side of the diaphragm assembly 20. The first coil 51 is sleeved outside the first driving member 31 and laminated on the bottom side of the diaphragm assembly 20. The first washer 23 is clamped between the first coil 51 and the diaphragm 21, and the second washer 25 is clamped between the second driving member 33 and the diaphragm 21.

[0038] The loudspeaker 100 further includes a connecting plate 70. The connecting plate 70 is connected to the housing 60 to position the diaphragm assembly 20, the magnetic driving assembly 30, and the coil assembly 50 within the housing 60. The connecting plate 70 is provided with a notch 72 for the insertion of the wire 55.

[0039] Please refer to Figure 1 - Figure 5 When assembling the speaker 100, sleave the second driving member 33 outside the second coil 53, and stack the two on the top side of the diaphragm assembly 20; sleave the first coil 51 outside the first driving member 31, and stack the two on the bottom side of the diaphragm assembly 20; electrically connect the wire 55 to the first coil 51 and the second coil 53; place the whole of the diaphragm assembly 20, the magnetic driving assembly 30 and the coil assembly 50 in the receiving space 65 of the housing 60, and make the second driving member 33 and the second coil 53 close to the top plate 62. The outer peripheral surfaces of the second driving member 33 and the first coil 51 are both in close contact with the inner peripheral surface of the housing 60, and the wire 55 is placed in the wire groove 66 of the housing 60; then fixedly connect the connecting plate 70 to the side of the housing 60 away from the top plate 62, so that the diaphragm assembly 20, the magnetic driving assembly 30 and the coil assembly 50 are positioned in the housing 60, and the wire 55 passes out from the notch 72. At this time, the diaphragm 21, the first driving member 31, the second driving member 33, the first coil 51, the second coil 53, the first washer 23 and the second washer 25 are coaxial; the orthographic projections of the first driving member 31 and the second coil 53 on the diaphragm 21 are both located in the middle of the diaphragm 21, and the orthographic projections of the second driving member 33 and the first coil 51 on the diaphragm 21 are both located around the diaphragm 21.

[0040] When using the speaker 100, energize the first coil 51 and the second coil 53 through the wire 55 to magnetize the diaphragm 21; the magnetic force between the first driving member 31 and the second driving member 33 drives the magnetized diaphragm 21 to vibrate and generate sound.

[0041] Please refer to Figure 6 , Figure 6 which is a schematic diagram of the three-dimensional structural member of an audio reproduction device 300 according to an embodiment of the present invention. The present invention also provides an audio reproduction device 300, which includes a housing 301 and the speaker 100. The housing 301 includes an inner cavity and a sound outlet channel 303 communicating with the inner cavity. The speaker 100 is disposed in the inner cavity of the housing 301, and the sound outlet hole 61 of the speaker 100 communicates with the sound outlet channel 303. The sound generated by the speaker 100 enters the sound outlet channel 303 through the sound outlet hole 61 and then exits from the sound outlet channel 303.

[0042] The audio reproduction device 300 further includes a circuit board and a battery 305. The circuit board is electrically connected to the wire 55 and the battery 305. The battery 305 is used to supply power to the speaker 100, the circuit board, and other electronic devices.

[0043] In this embodiment, the audio reproduction device 300 is an earphone. The housing 301 of the earphone is provided with a sound guide tube along the sound output channel 303, and an ear cap 306 is sleeved on the sound guide tube. When the earphone is inserted into the user's ear canal through the ear cap 306, since the force distribution on the diaphragm 21 of the speaker 100 is uniform, the sensitivity of the diaphragm 21 is improved, so that the diaphragm 21 is driven to push the air to generate sound, making the sound clearer, the high-frequency tone mellow, and improving the user experience.

[0044] In other embodiments, the audio reproduction device 300 may also be a speaker, etc. The speaker 100 in the present invention can be applied to electronic products that need to generate sound, such as computers, televisions, mobile phones, etc.

[0045] Please refer to Figure 7 , Figure 7 is a schematic cross-sectional structure diagram of the speaker 100a according to the second embodiment of the present invention. The structure of the speaker 100a according to the second embodiment of the present invention is similar to the structure of the speaker 100 in the first embodiment. The difference is that: the orthographic projection of the second coil 53 on the diaphragm 21 in the second embodiment is located within the orthographic projection of the first driving member 31a on the diaphragm 21, that is, the contour of the orthographic projection of the second coil 53 on the diaphragm 21 falls within the contour of the orthographic projection of the first driving member 31a on the diaphragm 21; specifically, if the second coil 53 is a circular coil, then the first driving member 31a is also a circular cylinder, and the outer diameter value of the circular coil is less than the outer diameter value of the circular cylinder; if the second coil 53 is a rectangular coil, then the first driving member 31a is a rectangular body, and the length and width of the outer periphery of the rectangular coil are less than the length and width of the rectangular body. In this embodiment, the orthographic projection of the first driving member 31a on the diaphragm 21 is circular, the orthographic projection of the second coil 53 on the diaphragm 21 is annular, both the circle and the annulus are located in the middle of the diaphragm 21, and the diameter value of the circle is greater than the outer diameter value of the annulus. The orthographic projection of the first coil 51 on the diaphragm 21 is located within the orthographic projection of the second driving member 33 on the diaphragm 21, and the outer peripheral surfaces of the first coil 51 and the second driving member 33 are attached to the inner peripheral surface of the side wall 64 of the housing 60, that is, the outer diameter value of the first coil 51 is equal to the outer diameter value of the second driving member 33, and the inner diameter value of the first coil 51 is greater than the inner diameter value of the second driving member 33.

[0046] The orthographic projection of the first driving member 31a on the diaphragm 21 overlaps with the orthographic projection of the second driving member 33 on the diaphragm 21, that is, the sum of the area of the orthographic projection of the first driving member 31a on the diaphragm 21 and the area of the orthographic projection of the second driving member 33 on the diaphragm 21 is greater than the surface area of the diaphragm 21. Since the area of the orthographic projection of the first driving member 31a on the diaphragm 21 is relatively large, therefore, the middle part of the magnetized diaphragm 21 is subjected to greater force, which can further improve the sensitivity of the diaphragm 21.

[0047] In this embodiment, the orthographic projection of the first driving member 31a on the diaphragm 21 is circular, the orthographic projection of the second driving member 33 on the diaphragm 21 is annular, and the diameter value of the circle is greater than the inner diameter value of the annulus and less than the outer diameter value of the annulus. Preferably, the circumference of the orthographic projection of the first driving member 31a on the diaphragm 21 is located in the middle of the annulus.

[0048] Please refer to Figure 8 , Figure 8 FIG. is a schematic cross-sectional structure diagram of the speaker 100b according to the third embodiment of the present invention. The structure of the speaker 100b according to the third embodiment of the present invention is similar to the structure of the speaker 100 in the first embodiment, the difference being that: the first driving member 31b in the third embodiment is a magnet ring, the first coil 51 is sleeved on the outer periphery of the first driving member 31b, the magnet ring and the first coil 51 are coaxially arranged, the orthographic projection area of the magnet ring on the bottom surface of the diaphragm 21 is close to the middle of the diaphragm 21, the orthographic projection area of the second coil 53 on the top surface of the diaphragm 21 is close to the middle of the diaphragm 21, and the orthographic projection area of the magnet ring on the diaphragm 21 coincides with the orthographic projection area of the second coil 53 on the diaphragm 21. The orthographic projection area of the second driving member 33 on the top surface of the diaphragm 21 is close to the periphery of the diaphragm 21, the orthographic projection area of the first coil 51 on the bottom surface of the diaphragm 21 is close to the periphery of the diaphragm 21, and the orthographic projection area of the second driving member 33 on the diaphragm 21 coincides with the orthographic projection area of the first coil 51 on the diaphragm 21. When the speaker 100a works, the magnetic forces applied by the first driving member 31b and the second driving member 33 to the magnetized diaphragm 21 are relatively evenly distributed to improve the sensitivity of the diaphragm 21, so that the sound emitted by the vibration of the diaphragm 21 is clearer, the timbre is high-frequency mellow, and the user experience is improved. In addition, the first driving member 31b is designed as a magnet ring, which can save the material for manufacturing the first driving member 31b, reduce the cost, and reduce the weight of the speaker 100b.

[0049] Please refer to Figure 9 , Figure 9It is a schematic cross-sectional structure diagram of the speaker 100c according to the fourth embodiment of the present invention. The structure of the speaker 100c according to the fourth embodiment of the present invention is similar to the structure of the speaker 100 in the first embodiment. The difference lies in that: in the fourth embodiment, the first driving member 31c and the first coil 51 are closer to the side of the first sound outlet hole 61 than the second coil 53 and the second driving member 33, that is, the first driving member 31c and the first coil 51 are located on the top side of the diaphragm 21, and the second driving member 33 and the second coil 53 are located on the bottom side of the diaphragm 21. A through hole 313 communicating with the first sound outlet hole 61 is provided in the middle of the first driving member 31c, that is, the first driving member 31c is a magnet ring, and the through hole 313 is the inner cavity of the magnet ring, and the inner cavity of the magnet ring communicates with the first sound outlet hole 61. The magnet ring surrounds the first sound outlet hole 61, the outer peripheral surface of the first coil 51 fits on the inner peripheral surface of the side wall 64, and the outer peripheral surface of the second driving member 33 fits on the inner peripheral surface of the side wall 64. The orthographic projection area of the first driving member 31c on the diaphragm 21 is close to the middle of the diaphragm 21, and the orthographic projection area of the second driving member 33 on the diaphragm 21 is close to the periphery of the diaphragm 21. Therefore, when the speaker 100c works, the magnetic forces exerted by the first driving member 31c and the second driving member 33 on the magnetized diaphragm 21 are relatively uniform, so as to improve the sensitivity of the diaphragm 21, make the sound emitted by the vibration of the diaphragm 21 clearer, make the timbre high-frequency mellow, and improve the user experience.

[0050] In some embodiments, the inner cavity diameter value of the second coil 53 is smaller than the diameter value of the through hole 313 of the first driving member 31c, that is, the inner cavity diameter value of the second coil 53 becomes smaller, so that the area of the orthographic projection of the second coil 53 on the diaphragm 21 increases, and the magnetization of the diaphragm 21 can be made faster and more uniform. Further, the inner cavity diameter value of the second coil 53 is smaller than the diameter value of the first sound outlet hole 61, and it only needs to meet the condition that the magnetic lines of force can pass through.

[0051] Please refer to Figure 10 , Figure 10It is a schematic cross-sectional structure diagram of the loudspeaker 100d according to the fifth embodiment of the present invention. The structure of the loudspeaker 100d according to the fifth embodiment of the present invention is similar to the structure of the loudspeaker 100b in the third embodiment, except that: in the fifth embodiment, the connecting plate 70 is provided with a second sound outlet hole 74, the inner cavity of the second coil 53 communicates with the first sound outlet hole 61, and the through hole 313 of the first driving member 31b communicates with the second sound outlet hole 74. Thus, when the first coil 51 and the second coil 53 are energized, the diaphragm 21 is magnetized and vibrates to generate sound under the drive of the first driving member 31b and the second driving member 33. A part of the sound is transmitted from the first sound outlet hole 61, and another part of the sound is transmitted from the second sound outlet hole 74, enabling the loudspeaker 100d to emit sound in two directions and improving the application range of the loudspeaker 100d.

[0052] In other embodiments, a second sound outlet hole may also be formed in the connecting plate 70 on the basis of the fourth embodiment, so that the inner cavity of the second coil 53 communicates with the second sound outlet hole. A part of the sound generated by the vibration of the diaphragm 21 is transmitted from the first sound outlet hole 61, and another part is transmitted from the second sound outlet hole 74, enabling the loudspeaker to emit sound in two directions and improving the application range of the loudspeaker.

[0053] The above are the implementation manners of the embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the embodiments of the present invention, several improvements and retouches can be made, and these improvements and retouches are also regarded as the protection scope of the present invention.

Claims

1. A loudspeaker, characterized in that, Comprising: A diaphragm assembly, a first driving member, a second driving member, a first coil, and a second coil, wherein the diaphragm assembly includes a diaphragm; The first side of the diaphragm is provided with the first driving member and the first coil, and there is a first gap between both the first coil and the first driving member and the diaphragm; the second side of the diaphragm is provided with the second coil and the second driving member, and there is a second gap between both the second driving member and the second coil and the diaphragm; Wherein, the first coil surrounds the outer periphery of the first driving member, and the second driving member surrounds the outer periphery of the second coil; the center line of the diaphragm, the center line of the first driving member, the center line of the second driving member, the center line of the first coil, and the center line of the second coil are collinear; the orthographic projection of the outer contour of the second coil on the diaphragm coincides with the orthographic projection of the outer contour of the first driving member on the diaphragm; Or the orthographic projection of the second coil on the diaphragm is located within the orthographic projection of the first driving member on the diaphragm; or the orthographic projection of the first driving member on the diaphragm is located within the orthographic projection of the second coil on the diaphragm; if the first coil and the second coil are energized, the diaphragm is magnetized and vibrates to generate sound under the drive of the first driving member and the second driving member.

2. The loudspeaker according to claim 1, characterized in that, The orthographic projection of the first coil on the diaphragm coincides with the orthographic projection of the second driving member on the diaphragm; Or the orthographic projection of the first coil on the diaphragm is located within the orthographic projection of the second driving member on the diaphragm; Or the orthographic projection of the second driving member on the diaphragm is located within the orthographic projection of the first coil on the diaphragm.

3. The loudspeaker according to claim 1, characterized in that, The orthographic projection of the first coil on the diaphragm overlaps with the orthographic projection of the second driving member on the diaphragm.

4. The loudspeaker according to claim 1, wherein The orthographic projection of the first coil on the diaphragm coincides with the orthographic projection of the second driving member on the diaphragm.

5. The loudspeaker according to claim 1, characterized in that, The outer diameter value of the first driving member or the second driving member is equal to or greater than the outer diameter value of the second coil.

6. The loudspeaker according to claim 1, wherein The outer diameter value of the second driving member is equal to the outer diameter value of the first coil, and the inner diameter value of the second driving member is equal to or less than the inner diameter value of the first coil.

7. The loudspeaker according to claim 1, wherein The diaphragm assembly further includes a first washer and a second washer, the first washer and the second washer are arranged on the opposite side surfaces of the diaphragm to position the diaphragm, the first washer is located within the first gap, and the second washer is located within the second gap.

8. The loudspeaker according to claim 1, wherein Comprising a housing, the housing is provided with a first sound outlet hole, the inner cavity of the second coil communicates with the first sound outlet hole, or the first driving member is provided with a through hole communicating with the first sound outlet hole.

9. The loudspeaker according to claim 8, wherein The second coil and the second driving member are closer to the side of the first sound outlet hole than the first driving member and the first coil, and the inner cavity of the second coil surrounds the periphery of the first sound outlet hole.

10. The loudspeaker according to claim 8, wherein, The first driving member and the first coil are closer to the side of the first sound outlet hole than the second coil and the second driving member, and the through hole of the first driving member surrounds the periphery of the first sound outlet hole.

11. The loudspeaker according to claim 8, wherein It further includes a connecting plate, and the connecting plate is connected to the housing so that the diaphragm assembly, the magnetic driving assembly and the coil assembly are positioned within the housing.

12. The loudspeaker according to claim 11, wherein, The connecting plate is provided with a second sound outlet hole. When the inner cavity of the second coil communicates with the first sound outlet hole, the through hole of the first driving member communicates with the second sound outlet hole; when the through hole of the first driving member communicates with the first sound outlet hole, the inner cavity of the second coil communicates with the second sound outlet hole.

13. An audio reproduction apparatus, characterized in that, It includes a housing and the loudspeaker according to any one of claims 1-12. The housing includes an inner cavity and a sound outlet channel communicating with the inner cavity. The loudspeaker is arranged in the inner cavity of the housing, and the sound outlet hole of the loudspeaker communicates with the sound outlet channel.

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