Loudspeaker and earphone

Abstract

The utility model discloses a loudspeaker and an earphone. The loudspeaker comprises an annular frame body, a magnetic circuit assembly, a first vibration assembly and a second vibration assembly. The annular frame body is provided with a first end and a second end; the magnetic circuit assembly is arranged in the annular frame body; the first vibration assembly comprises a first vibrating diaphragm, the edge of the first vibrating diaphragm is connected with the first end, and the first vibrating diaphragm, the annular frame body and the magnetic circuit assembly jointly define a first cavity; the second vibration assembly comprises a second vibrating diaphragm, the edge of the second vibrating diaphragm is connected with the second end, and the second vibrating diaphragm, the annular frame body and the magnetic circuit assembly jointly define a second cavity; a second through opening is formed in the side, away from the magnetic circuit assembly, of the second vibrating diaphragm, an airflow channel is formed in the magnetic circuit assembly, the first cavity is communicated with the second through opening through the airflow channel, and a first through opening communicated with the second cavity is formed in the annular frame body. Therefore, the diaphragm area of the loudspeaker and the vibration amplitude of the diaphragm can be increased, and the sound output by the loudspeaker can be increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of acoustic devices, and particularly relates to a loudspeaker and earphone. BACKGROUND

[0002] The loudspeaker generally comprises a diaphragm, a voice coil and a magnetic circuit assembly, the voice coil is connected with the diaphragm, the voice coil generates a magnetic field when electrified, the voice coil moves under the action of the magnetic field of the magnetic circuit assembly, and then drives the diaphragm to vibrate and sound.

[0003] For a loudspeaker with a small volume, the diaphragm area in the loudspeaker is usually small due to the limitation of the volume of the loudspeaker, thereby causing the loudspeaker to output a small sound. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a loudspeaker and earphone, which can increase the diaphragm area and vibration amplitude of the loudspeaker, and then increase the sound output by the loudspeaker.

[0005] In a first aspect, the present application provides a loudspeaker, comprising:

[0006] The annular frame body has a first end and a second end arranged along a first direction, and a first through port is arranged on the annular frame body;

[0007] The magnetic circuit assembly is arranged in the annular frame body and connected with the inner side wall of the annular frame body, a first magnetic gap is formed on one side of the magnetic circuit assembly close to the first end, a second magnetic gap is formed on one side of the magnetic circuit assembly close to the second end, and an airflow channel is arranged on the magnetic circuit assembly;

[0008] The first vibration assembly comprises a first diaphragm and a first voice coil, the edge of the first diaphragm is connected with the first end, the first diaphragm is connected with the annular frame body and the magnetic circuit assembly to jointly form a first cavity, one end of the first voice coil is inserted into the first magnetic gap, and the other end of the first voice coil is connected with the first diaphragm;

[0009] The second vibration assembly is located on one side of the magnetic circuit assembly away from the first vibration assembly, the second vibration assembly comprises a second diaphragm and a second voice coil, the edge of the second diaphragm is connected with the second end, the second diaphragm is connected with the magnetic circuit assembly, the first diaphragm is connected with the annular frame body and the magnetic circuit assembly to jointly form a second cavity, one end of the second voice coil is inserted into the first magnetic gap, and the other end of the second voice coil is connected with the second diaphragm, the vibration direction of the second diaphragm is the same as that of the first diaphragm, and a second through port is arranged on one side of the second diaphragm away from the magnetic circuit assembly;

[0010] The first cavity is communicated with the second through port through the airflow channel, and the second cavity is communicated with the first through port.

[0011] In a second aspect, the application also provides an earphone, comprising a shell and a loudspeaker, the shell is provided with a sound outlet, the loudspeaker is arranged in the shell, the loudspeaker divides a cavity in the shell into a front cavity and a rear cavity, the sound outlet and the second port are both in communication with the front cavity, and the first port is in communication with the rear cavity.

[0012] The application has the beneficial effects that: by arranging the first diaphragm and the second diaphragm, the diaphragm area in the loudspeaker can be increased without changing the circumferential size of the loudspeaker, so that the sound output by the loudspeaker can be increased; in addition, when the first diaphragm vibrates downward, the air in the first cavity is discharged from the second port and gathered together with the air pushed by the second diaphragm, so that the same-direction vibration is realized, the sound pressure generated by the superposition of the two is equivalent to the superposition of the radiation areas of the first diaphragm and the second diaphragm, so that the effective radiation area of the loudspeaker can be increased, and the bass quality of the loudspeaker can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the application or the related art, the following will briefly introduce the drawings needed to be used in the embodiment or related art description. Obviously, the drawings in the following description only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0014] Figure 1 It is a structure schematic diagram of the loudspeaker in a first view in an embodiment of the application;

[0015] Figure 2 It is a structure schematic diagram of the loudspeaker in a second view in an embodiment of the application;

[0016] Figure 3 It is a partial structure schematic diagram of the loudspeaker in an embodiment of the application;

[0017] Figure 4 It is a component exploded schematic diagram of the loudspeaker in an embodiment of the application;

[0018] Figure 5 It is a component exploded schematic diagram of the magnetic circuit assembly in an embodiment of the application;

[0019] Figure 6 It is a structure schematic diagram of the loudspeaker in another embodiment of the application.

[0020] Reference signs:

[0021] 10, ring-shaped frame body; 11, first end; 12, second end; 20, magnetic circuit assembly; 21, air flow channel; 22, first magnetic conducting member; 221, protruding part; 221a, third through hole; 221a, accommodating groove; 222, supporting part; 223, air guiding channel; 23, first magnet; 231, second through hole; 24, second magnetic conducting member; 241, first through hole; 25, second magnet; 26, third magnetic conducting member; 27, first magnetic gap; 28, second magnetic gap; 29, air vent; 30, first vibration assembly; 31, first diaphragm; 32, first voice coil; 40, second vibration assembly; 41, second diaphragm; 411, folded ring part; 42, second voice coil; 43, connecting member; 431, first channel; 44, supporting ring; 441, second channel; 51, first cavity; 52, second cavity; 53, second port; 54, first port; 60, high-pitched sound generating member; 61, sound generating pipeline; 611, sound outlet channel. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0023] A loudspeaker generally includes a diaphragm, a voice coil and a magnetic circuit assembly. The voice coil is connected to the diaphragm. When the voice coil is powered, a magnetic field is generated. The voice coil moves under the action of the magnetic field of the magnetic circuit assembly, thereby driving the diaphragm to vibrate and produce sound.

[0024] For a loudspeaker with a small volume, such as a loudspeaker applied in a earphone, the earphone is favored by a large number of consumers due to its comfort and non-in-earness. In order to provide better wearing comfort for users, the volume of the earphone is usually made smaller, thereby resulting in a smaller volume of the loudspeaker in the earphone. Since the loudspeaker has a small volume, the diaphragm area of the loudspeaker is small, and the diaphragm area is directly proportional to the loudspeaker output sound size, so that the loudspeaker output sound is small.

[0025] In view of the above problems, the present application provides a loudspeaker and an earphone to solve the above problems.

[0026] In a first aspect, the present application provides a loudspeaker, as shown in Figures 1 to 3 The loudspeaker includes a ring-shaped frame body 10, a magnetic circuit assembly 20, a first vibration assembly 30 and a second vibration assembly 40. The overall shape of the loudspeaker can be circular, oval, rectangular, square or other shapes, and the present application does not specifically limit the shape of the loudspeaker.

[0027] The annular frame body 10 has a first end 11 and a second end 12 arranged along a first direction XX, the annular frame body 10 can be a circular ring, a square ring or other rings, when the annular frame body 10 is a circular ring, the first direction XX is the axial direction of the annular frame body 10; the magnetic circuit assembly 20 is arranged in the annular frame body 10 and connected with the inner side wall of the annular frame body 10, the side of the magnetic circuit assembly 20 close to the first end 11 is formed with a first magnetic gap 27, and the side of the magnetic circuit assembly 20 close to the second end 12 is formed with a second magnetic gap 28; the first vibration assembly 30 includes a first diaphragm 31 and a first voice coil 32, the axial direction of the first diaphragm 31 is parallel to the first direction XX, the edge of the first diaphragm 31 is connected with the first end 11, the first diaphragm 31 is jointly enclosed with the annular frame body 10 and the magnetic circuit assembly 20 to form a first cavity 51, one end of the first voice coil 32 is inserted into the first magnetic gap 27, and the other end of the first voice coil 32 is connected with the first diaphragm 31; the second vibration assembly 40 is located on the side of the magnetic circuit assembly 20 away from the first vibration assembly 30, the second vibration assembly 40 includes a second diaphragm 41 and a second voice coil 42, the axial direction of the second diaphragm 41 is parallel to the first direction XX, the edge of the second diaphragm 41 is connected with the second end 12, and the second diaphragm 41 is connected with the magnetic circuit assembly 20, the second diaphragm 41 is jointly enclosed with the annular frame body 10 and the magnetic circuit assembly 20 to form a second cavity 52, one end of the second voice coil 42 is inserted into the second magnetic gap 22, and the other end of the second voice coil 42 is connected with the second diaphragm 41.

[0028] It should be noted that the first cavity 51 and the second cavity 52 are separated by the magnetic circuit assembly 20, the first cavity 51 provides a vibration space for the first diaphragm 31, the second cavity 52 provides a vibration space for the second diaphragm 41, the first diaphragm 31 and the second diaphragm 41 can be mounted on the frame by an adhesive method; the first magnetic gap 27 and the second magnetic gap 28 open in opposite directions, the first magnetic gap 27 is used to provide a moving space for the first voice coil 32, the second magnetic gap 28 is used to provide a moving space for the second voice coil 42, the first voice coil 32 is connected with the first diaphragm 31 by an adhesive method, the second voice coil 42 can be connected with the second diaphragm 41 by an adhesive method, the first voice coil 32 and the second voice coil 42 generate a magnetic field when energized, so that the first voice coil 32 and the second voice coil 42 move along the first direction XX under the action of the magnetic field of the magnetic circuit assembly 20, and then drive the first diaphragm 31 and the second diaphragm 41 to vibrate and sound along the first direction XX, in this application, by arranging the first diaphragm 31 and the second diaphragm 41, the diaphragm area in the loudspeaker can be increased without changing the circumferential size of the loudspeaker, so that the output sound of the loudspeaker can be increased.

[0029] Specifically, the vibration direction of the second diaphragm 41 is the same as that of the first diaphragm 31, which means that at the same time, the vibration direction of the second diaphragm 41 is the same as that of the first diaphragm 31. The second port 53 is arranged on the side of the second diaphragm 41 away from the magnetic circuit assembly 20. The airflow channel 21 is arranged on the magnetic circuit assembly 20. The first cavity 51 is in communication with the second port 53 through the airflow channel 21. The first port 54 is arranged on the ring-shaped frame body 10 and is in communication with the second cavity 52. It can be understood that the first cavity 51 is in communication with the atmosphere through the airflow channel 21 and the second port 53, and the second cavity 52 is in communication with the atmosphere through the first port 54, so that the first cavity 51 and the second cavity 52 can exchange air with the outside air when the first diaphragm 31 and the second diaphragm 41 vibrate. Referring to Figure 3 the view shown in FIG. 6, when the first diaphragm 31 vibrates downward, the second diaphragm 41 also vibrates downward. The first diaphragm 31 will expel the air in the first cavity 51 through the airflow channel 21 and the second port 53, and the second diaphragm 41 will expel the air in the second cavity 52 through the first port 54. When the first diaphragm 31 vibrates upward, the second diaphragm 41 also vibrates upward. The first diaphragm 31 will suck the air in the atmosphere into the first cavity 51 through the second port 53 and the airflow channel 21, and the second diaphragm 41 will suck the air in the atmosphere into the second cavity 52 through the first port 54.

[0030] It should be further noted that when the loudspeaker is applied to a headset, the sound quality of the headset is related to the sound quality of the bass (referring to the sound with a frequency below 250 Hz, which mainly ensures the fullness and thickness of the sound) produced by the loudspeaker. The bass sound quality of the loudspeaker is related to the effective radiation area of the diaphragm. Generally speaking, the larger the effective radiation area, the better the bass sound quality of the loudspeaker. For example, referring to the view shown in FIG. 6, Figure 3 the view shown in FIG. 6, Figure 3 the solid small arrow in FIG. 6 represents the flow path of the airflow in the first cavity 51 when the first diaphragm 31 vibrates downward, Figure 3 the dashed small arrow in FIG. 6 represents the flow path of the airflow in the second cavity 52 when the first diaphragm 31 vibrates downward. The air in the first cavity 51 is expelled from the second port 53 and converges with the air pushed by the second diaphragm 41 to realize co-directional vibration. The sound pressure generated by the superposition of the two is equivalent to the superposition of the radiation areas of the first diaphragm 31 and the second diaphragm 41, thereby increasing the effective radiation area of the loudspeaker and improving the bass sound quality of the loudspeaker.

[0031] In some embodiments, as Figure 2 and Figure 3As shown, the second diaphragm 41 includes at least two folded ring portions 411 protruding away from the second cavity 52, the at least two folded ring portions 411 are arranged around the second opening 53 and spaced from each other, that is, the at least two folded ring portions 411 are sequentially and spaced arranged along the radial direction of the second diaphragm 41. The at least two folded ring portions 411 are respectively located on both sides of the second voice coil 28. It can be understood that the folded ring portion 411 can make the second diaphragm 41 have a folded structure, so that the portions of the second diaphragm 41 located on both sides of the second voice coil 28 can normally vibrate and deform during the reciprocating movement of the second voice coil 28 along the first direction XX, preventing the second voice coil 28 from reciprocally pulling the second diaphragm 41 and causing damage to the second diaphragm 41; in addition, the folded structure can also increase the diaphragm area of the second diaphragm 41, and at the same time, the space defined by the folded ring portion 411 can increase the volume of the second cavity 52, thereby further increasing the effective radiation area of the loudspeaker.

[0032] Among them, the folded ring portion 411 can be provided with 2, 3, 4 or more; the second voice coil 42 can be connected with the flat portion between the adjacent two folded ring portions 411, so that the first voice coil 32 can move more smoothly along the first direction XX.

[0033] In some embodiments, the effective radiation area of the first diaphragm 31 is s1, and the effective radiation area of the second diaphragm 41 is s2, s2≤s1≤10*s2, preventing the difference between the size of the first diaphragm 31 and the size of the second diaphragm 41 from being too large, so that the radiation area of the first diaphragm 31 and the radiation area of the second diaphragm 41 have more obvious sound quality enhancement effect when they are superimposed together. Among them, s1 can be equal to s2, of course, s1 can also be 1 times, 2 times, 5 times, 8 times, 10 times or other multiples of s2.

[0034] In some embodiments, the cross-sectional area of the second opening 53 is S1, and the cross-sectional area of the first opening 54 is S2, wherein 1 square millimeter≤S1≤100 square millimeters, and / or 0.1 square millimeter≤S2≤50 square millimeters. So that the second opening 53 and the first opening 54 have a suitable opening area, on the basis of ensuring that the first cavity 51 and the second cavity 52 can quickly exchange gas with the outside air, preventing the second opening 53 and the first opening 54 from occupying a large area and affecting the overall structural strength of the loudspeaker. Among them, S1 can be 1 square millimeter, 20 square millimeters, 50 square millimeters, 70 square millimeters, 100 square millimeters or other numerical values; S2 can be 1 square millimeter, 20 square millimeters, 50 square millimeters, 70 square millimeters, 100 square millimeters or other numerical values.

[0035] In some embodiments, the first through hole 54 is provided in plurality, and the plurality of first through holes 54 are arranged along the circumference of the ring-shaped frame body 10 to enable the second cavity 52 to exchange gas with the outside air from various directions. The number of the first through holes 54 is m, and 2≤m≤30, m can be 2, 5, 10, 15, 20, 25, 30 or other values. Of course, in other embodiments, m can also be 1, that is, only one first through hole 54 is provided.

[0036] As shown in the drawings, in some embodiments of the present application, the magnetic circuit assembly 20 includes a first magnetic conducting member 22, a first magnet 23, a second magnetic conducting member 24, a second magnet 25 and a third magnetic conducting member 26. Figures 3 to 5

[0037] The first magnetic conducting member 22 includes a protruding portion 221 and a supporting portion 222, the protruding portion 221 protrudes towards the second cavity 52 relative to the supporting portion 222, the side of the protruding portion 221 close to the first cavity 51 is provided with a receiving groove 221a, and the supporting portion 222 extends around the circumferential side of the protruding portion 221 and is connected with the protruding portion 221 and the ring-shaped frame body 10; the first magnet 23 is located in the receiving groove 221a, and the first magnet 23 and the circumferential wall of the receiving groove 221a form a first magnetic gap 27; the second magnetic conducting member 24 is located on the side of the first magnet 23 away from the bottom of the receiving groove 221a; the second magnet 25 is arranged around the outer periphery of the protruding portion 221, and the second magnet 25 and the protruding portion 221 form a second magnetic gap 28; and the third magnetic conducting member 26 is located on the side of the second magnet 25 away from the supporting portion 222.

[0038] It should be noted that by forming the first magnetic gap 27 and the second magnetic gap 28 between the first magnetic conducting member 22 and the first magnet 23 and the second magnet 25 respectively, the number of devices in the magnetic circuit assembly 20 can be reduced, thereby reducing the overall volume of the loudspeaker, and by forming the receiving groove 221a for accommodating the first magnet 23 on the first magnetic conducting member 22, the thickness of the magnetic circuit assembly 20 in the first direction XX can be reduced, thereby reducing the space occupied by the magnetic circuit assembly 20, and thus the volume of the loudspeaker can be reduced. The receiving groove 221a can be formed when the protruding portion 221 is formed, for example, by pressure casting to make part of the first magnetic conducting member 22 protrude to form the protruding portion 221, and at the same time form the receiving groove 221a.

[0039] ​The first magnetic conductor 22, the second magnetic conductor 24 and the third magnetic conductor 26 all have the function of concentrating magnetic field, the first magnetic conductor 22 and the second magnetic conductor 24 can make the magnetic field generated by the first magnet 23 concentrate and distribute between the first magnetic conductor 22 and the second magnetic conductor 24, the first magnetic conductor 22 and the third magnetic conductor 26 can make the magnetic field generated by the second magnet 25 concentrate and distribute between the first magnetic conductor 22 and the third magnetic conductor 26, and the first magnetic conductor 22, the second magnetic conductor 24 and the third magnetic conductor 26 can be made of low carbon steel.

[0040] It should be further explained that the vibration direction of the second diaphragm 41 can be designed to be the same as the vibration direction of the first diaphragm 31 by designing the magnetic field of the magnetic circuit assembly 20 and the current flow direction of the first voice coil 32 and the second voice coil 42.

[0041] In some embodiments, the magnetic pole of the first magnet 23 close to one end of the first magnetic conductor 22 is the same as the magnetic pole of the second magnet 25 close to one end of the first magnetic conductor 22. According to the principle of magnetic attraction, the magnetic field always points from N pole to S pole, when the magnetic pole of the first magnet 23 close to one end of the first magnetic conductor 22 is S pole, the magnetic pole of the first magnet 23 far from one end of the first magnetic conductor 22 is N pole, the magnetic pole of the second magnet 25 close to one end of the first magnetic conductor 22 is also S pole, and the magnetic pole of the second magnet 25 far from one end of the first magnetic conductor 22 is also N pole, at this time, the magnetic field of the first magnet 23 and the second magnet 25 all points from the end far from the first magnetic conductor 22 to the end close to the first magnetic conductor 22; according to the same reason, when the magnetic pole of the first magnet 23 close to one end of the first magnetic conductor 22 is N pole, the magnetic pole of the first magnet 23 far from one end of the first magnetic conductor 22 is S pole, the magnetic pole of the second magnet 25 close to one end of the first magnetic conductor 22 is also N pole, and the magnetic pole of the second magnet 25 far from one end of the first magnetic conductor 22 is also S pole, at this time, the magnetic field of the first magnet 23 and the second magnet 25 all points from the end close to the first magnetic conductor 22 to the end far from the first magnetic conductor 22, so that the magnetic concentrating requirement of the first magnet 23 and the second magnet 25 can be met through the first magnetic conductor 22, and the magnetic conducting principle of the magnetic conductor has been disclosed in the related art, and details are not repeated here.

[0042] In some embodiments, the inner diameter of the first voice coil 32 is D1, the inner diameter of the second voice coil 42 is D2, and 0.1*D2≤D1≤15*D2, which prevents the difference between the size of the first voice coil 32 and the size of the second voice coil 42 from being too large, thereby preventing the difference between the driving forces provided by the magnetic circuit assembly 20 for the first voice coil 32 and the second voice coil 42 from being too large. Wherein, D1 can be equal to D2, of course, D1 can also be 0.1 times, 0.5 times, 2 times, 5 times, 10 times, 15 times or other multiples of D2.

[0043] In some embodiments, the second magnetic conductor 24 is provided with a first through hole 241 penetrating the second magnetic conductor 24, the first magnet 23 is provided with a second through hole 231 penetrating the first magnet 23, and the protruding portion 221 is provided with a third through hole 221a penetrating the protruding portion 221, the first through hole 231, the second through hole 241 and the third through hole 221a are sequentially communicated to form the air flow channel 21. It can be understood that the air flow channel 21 is formed by the through holes in the first magnet 23, the second magnetic conductor 24 and the protruding portion 221, so that the length of the air flow channel 21 can be as short as possible, thereby shortening the time for the first cavity 51 to exchange gas with the outside air through the air flow channel 21, and further improving the gas exchange efficiency.

[0044] In some embodiments, the first magnetic conductor 22 is provided with a gas guide channel 223 on the side close to the first diaphragm 31, and the first magnetic gap 27 is communicated with the air flow channel 21 through the gas guide channel 223. It can be understood that, as shown in the view angle, Figure 3 When the first diaphragm 31 vibrates downward, the gas in the first magnetic gap 27 can be quickly discharged into the air flow channel 21 through the gas guide channel 223, and the gas in the first cavity 51 outside the first voice coil 32 can also flow into the air flow channel 21 through the gas guide channel 223, thereby preventing the air gap on both sides of the first voice coil 32 from affecting the vibration of the first diaphragm 31.

[0045] The gas guide channel 223 is a gas guide groove opening towards the accommodating groove 221a, and is arranged on the inner wall of the accommodating groove 221a and extends from the opening of the accommodating groove 221a to the air flow channel, so that the gas guide channel 223 has a longer length, which can better quickly discharge the gas in the first magnetic gap 27 into the air flow channel 21, and as shown in the view angle, Figure 3 The gas guide channel 223 does not penetrate the outer surface of the protruding portion 221, so that the gas guide channel 223 can avoid communicating the first cavity 51 with the second cavity 52.

[0046] Continuing to refer to Figures 3 to 5As shown, in some embodiments of the present application, the airflow passage 21 has an air vent 29 located on the side of the magnetic circuit assembly 20 close to the second vibration assembly 40, and the second vibration assembly 40 further comprises a connecting piece 43 located between the magnetic circuit assembly 20 and the second diaphragm 41, the second diaphragm 41 is sealingly connected to the magnetic circuit assembly 20 through the connecting piece 43, and the connecting piece 43 is arranged around the air vent 29 to define a first passage 431, and the air vent 29 is in communication with the second vent 53 through the first passage 431. It can be understood that the connecting piece 43 is a sealing piece for sealing the gap between the second diaphragm 41 and the magnetic circuit assembly 20, preventing the first cavity 51 from communicating with the second cavity 52 through the airflow passage 21 to affect the normal vibration of the first diaphragm 31 and the second diaphragm 41, and the connecting piece 43 can make the connection of the second diaphragm 41 and the magnetic circuit assembly 20 more convenient, and the first passage 431 is an adapter passage for realizing the communication between the airflow passage 21 and the first passage 431. Wherein, the air vent 29 is specifically arranged on the protruding portion 221 and formed by one end of the third through hole 221a.

[0047] Specifically, the second vent 53 is located on the protruding portion 221, the connecting piece 43 is located between the protruding portion 221 and the second diaphragm 41, and the second diaphragm 41 is sealingly connected to the protruding portion 221 through the connecting piece 43. Wherein, the connecting piece 43 can be made of metal, plastic or other materials, and the whole connecting piece 43 can be circular ring, square ring, horn or other shapes.

[0048] In some embodiments, the side of the second diaphragm 41 close to the connecting piece 43 has a support ring 44, the support ring 44 is sealingly connected to the connecting piece 43, and the support ring 44 is arranged around the air vent 29 to define a second passage 441, and the end of the second passage 441 away from the air vent 29 forms the second vent 53. It can be understood that the support ring 44 can be protruded towards the magnetic circuit assembly 20 relative to the second diaphragm 41, so that the connection of the sealing piece and the second diaphragm 41 is more convenient.

[0049] Wherein, the support ring 44 can be integrally formed with the second diaphragm 41, and the support ring 44 can be formed by bending part of the second diaphragm 41; the support ring 44 can also be formed separately with the second diaphragm 41 and spliced by bonding, clamping or other ways.

[0050] As Figure 6As shown, in some embodiments of the present application, the loudspeaker further comprises a high-pitched sound emitting member 60 connected with the connecting member 43, the high-pitched sound emitting member 60 is used to radiate high-pitched sound to the outside of the second opening 53, the high-pitched sound refers to sound with a frequency between 5 kHz and 20 kHz, the high-pitched sound mainly affects the brightness, loudness and clarity of the sound, when the loudspeaker works, the bass produced by the first diaphragm 31 and the second diaphragm 41 mixes with the high-pitched sound output by the high-pitched sound emitting member 60, which can expand the frequency width of the sound output by the loudspeaker, thereby improving the sound quality of the loudspeaker. The high-pitched sound emitting member 60 can be a separate moving coil assembly, a moving iron assembly, a micro loudspeaker assembly, a piezoelectric loudspeaker assembly or other sound emitting assemblies that can emit high-pitched sound.

[0051] In some embodiments, the high-pitched sound emitting member 60 comprises a sound emitting pipe 61 connected with the connecting member 43 and arranged around the air vent 29 to define a sound emitting channel 611, the high-pitched sound emitting member 60 radiates high-pitched sound to the outside of the second opening 53 through the sound emitting channel 611, and the sound emitting channel 611 communicates with the first cavity 51 through the airflow channel 21. It can be understood that by connecting the sound emitting pipe 61 with the connecting member 43, the sound emitting pipe 61 can be fixed without providing additional mounting and fixing members for the sound emitting pipe 61, at the same time, the sound emitting pipe 61 has the sound emitting channel 611, the sound emitting device in the high-pitched sound emitting member 60 can radiate high-pitched sound to the outside of the second opening 53 through the sound emitting channel 611, and when the first diaphragm 31 vibrates, the first cavity 51 can exchange gas with the outside air through the sound emitting channel 611, which can prevent the sound emitting pipe 61 from hindering the gas exchange between the first cavity 51 and the outside air.

[0052] The sound emitting pipe 61 can be integrally formed with the connecting member 43, or the sound emitting pipe 61 and the connecting member 43 can be separately formed and spliced by bonding, clamping, threaded connection, screw connection or other ways; the sound emitting pipe can be located in the second channel 441, or the sound emitting pipe can extend out of the second channel 441.

[0053] In a second aspect, based on the above-mentioned loudspeaker, the present application further provides an earphone, the earphone comprises a shell and a loudspeaker according to any one of the above-mentioned embodiments, the shell is provided with a sound outlet hole, the loudspeaker is arranged in the shell, the loudspeaker divides the cavity in the shell into a front cavity and a rear cavity, the sound outlet hole and the second opening 53 both communicate with the front cavity, the first opening 54 communicates with the rear cavity, and the sound produced by the vibration of the first diaphragm 31 and the second diaphragm 32 can be transmitted out of the shell in sequence through the airflow channel 21, the second opening 53, the front cavity and the sound outlet hole.

[0054] It should be noted that the earphone can be an open earphone, the open earphone comprising a power supply part, a sound output part and a connecting part, the sound output part being connected with the power supply part through the connecting part, the sound output part comprising a shell; wherein the power supply part is a part in the open earphone for supplying power to the loudspeaker, the power supply part comprising a battery and a circuit board and the like, the connecting part being used for realizing physical connection and electrical connection between the power supply part and the sound output part, the connecting part can comprise memory wire, conductive wire and soft silica gel and the like, the battery can be electrically connected with the loudspeaker through the conductive wire.

[0055] Of course, in other embodiments, the earphone can also be an in-ear earphone, a headphone, a lobe earphone, a neck-mounted earphone or other types of earphones.

[0056] The above only is the preferred embodiment of the present application, and does not limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A loudspeaker, characterized by The application relates to a loudspeaker, comprising: a ring-shaped frame body having a first end and a second end arranged along a first direction; a first through hole is arranged on the ring-shaped frame body; a magnetic circuit assembly arranged in the ring-shaped frame body and connected with an inner side wall of the ring-shaped frame body, a first magnetic gap is formed on one side of the magnetic circuit assembly close to the first end, and a second magnetic gap is formed on one side of the magnetic circuit assembly close to the second end; an airflow channel is arranged on the magnetic circuit assembly; a first vibration assembly comprising a first diaphragm and a first voice coil, an edge of the first diaphragm is connected with the first end, the first diaphragm, the ring-shaped frame body and the magnetic circuit assembly jointly form a first cavity, one end of the first voice coil is inserted into the first magnetic gap, and the other end of the first voice coil is connected with the first diaphragm; a second vibration assembly located on one side of the magnetic circuit assembly away from the first vibration assembly, the second vibration assembly comprising a second diaphragm and a second voice coil, an edge of the second diaphragm is connected with the second end, the second diaphragm is connected with the magnetic circuit assembly, the first diaphragm, the ring-shaped frame body and the magnetic circuit assembly jointly form a second cavity, one end of the second voice coil is inserted into the first magnetic gap, and the other end of the second voice coil is connected with the second diaphragm; the vibration direction of the second diaphragm is the same as that of the first diaphragm, and a second through hole is arranged on one side of the second diaphragm away from the magnetic circuit assembly; wherein the first cavity is communicated with the second through hole through the airflow channel, and the second cavity is communicated with the first through hole.

2. The loudspeaker of claim 1, wherein, The second diaphragm comprises at least two folded ring parts which are raised in a direction away from the second cavity, the at least two folded ring parts are arranged around the second through hole and are spaced from each other, and the at least two folded ring parts are respectively located on two sides of the second voice coil.

3. The loudspeaker of claim 1, wherein, The magnetic circuit assembly comprises: a first magnetic conducting part comprising a protruding part and a supporting part, the protruding part is protruded towards the second cavity relative to the supporting part, a containing groove is arranged on one side of the protruding part close to the first cavity, the supporting part extends around the circumferential side of the protruding part and is connected with the protruding part and the ring-shaped frame body; a first magnet located in the containing groove, the first magnet and the circumferential wall of the containing groove form the first magnetic gap; a second magnetic conducting part located on one side of the first magnet away from the bottom of the containing groove; a second magnet arranged around the outer periphery of the protruding part, the second magnet and the protruding part form the second magnetic gap; a third magnetic conducting part located on one side of the second magnet away from the supporting part.

4. The loudspeaker of claim 3, wherein, A first through hole penetrating through the second magnetic conducting part is arranged on the second magnetic conducting part, a second through hole penetrating through the first magnet is arranged on the first magnet, and a third through hole penetrating through the protruding part is arranged on the protruding part; the first through hole, the second through hole and the third through hole are sequentially communicated to form the airflow channel.

5. The loudspeaker of claim 3, wherein, A gas guiding channel is arranged on one side of the first magnetic conducting part close to the first diaphragm, and the first magnetic gap is communicated with the airflow channel through the gas guiding channel.

6. The loudspeaker of claim 1, wherein, The airflow passage has an air vent located at a side of the magnetic circuit assembly close to the second vibration assembly, and the second vibration assembly further comprises: a connecting piece located between the magnetic circuit assembly and the second diaphragm, the second diaphragm being in sealed connection with the magnetic circuit assembly through the connecting piece, the connecting piece being arranged around the air vent to define a first passage, the air vent being in communication with the second vent through the first passage.

7. The loudspeaker of claim 6, wherein, A supporting ring is arranged at a side of the second diaphragm close to the connecting piece, the supporting ring being in sealed connection with the connecting piece, the supporting ring being arranged around the air vent to define a second passage, the first passage being in communication with the second vent through the second passage.

8. The loudspeaker of claim 6, wherein, The loudspeaker further comprises: a high-frequency sound emitting piece connected with the connecting piece, the high-frequency sound emitting piece being configured to radiate high-frequency sound outside the second vent.

9. The loudspeaker of claim 8, wherein, The high-frequency sound emitting piece comprises: a sound emitting duct connected with the connecting piece and arranged around the air vent to define a sound emitting passage, the high-frequency sound emitting piece radiating high-frequency sound outside the second vent through the sound emitting passage, the sound emitting passage being in communication with the first cavity through the airflow passage.

10. The loudspeaker of claim 1, wherein, The first vent is provided in plurality, and the plurality of first vents are arranged in a circumferential direction of the annular frame body.

11. The loudspeaker of claim 1, wherein, The second vent has a cross-sectional area S1, and 1 square millimeter ≤ S1 ≤ 100 square millimeters; and / or The first vent has a cross-sectional area S2, and 0.1 square millimeter ≤ S2 ≤ 50 square millimeters.

12. An earphone, characterized by The loudspeaker comprises a housing and a loudspeaker as claimed in any one of claims 1 to 11, the housing being provided with a sound outlet hole, the loudspeaker being arranged in the housing, the loudspeaker dividing a cavity in the housing into a front cavity and a rear cavity, the sound outlet hole and the second vent being in communication with the front cavity, and the first vent being in communication with the rear cavity.

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