Diaphragm and loudspeaker

Abstract

The application provides a vibrating diaphragm and a loudspeaker. The loudspeaker comprises a vibrating diaphragm. The vibrating diaphragm comprises a crystal and a film body. The crystal can form a magnetic field after being electrified. The film body is formed by solidification of a liquid injection material. One side surface of the film body has a protruding part. The protruding part is provided with a receiving groove. The crystal is located in the receiving groove. The top of the protruding part has a shielding part. The shielding part is partially located above the receiving groove and is used for limiting the crystal and exposing part of the crystal. The crystal and the film body are connected in an integrated injection molding manner. The crystal can form a variable magnetic field through current change and interact with an environmental magnetic field to drive the film body to vibrate and emit sound. The vibrating diaphragm and the loudspeaker can realize the purposes of simplifying the process, ensuring the connection between the crystal and the film body, improving the production efficiency and reducing the processing cost by connecting the crystal and the film body in an integrated injection molding manner. The structural stability is further improved through the structural design of the protruding part and the shielding part in the film body, so that the purpose of ensuring the sound quality is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to a diaphragm and a loudspeaker. BACKGROUND

[0002] The conventional vibration assembly for vibration in a loudspeaker is usually composed of a diaphragm and a voice coil, wherein the voice coil is connected with the diaphragm by means of glue-dipping or the like, and the diaphragm is a plastic film, a carbon nanometer film or a graphite rare film or the like. However, the conventional design structure is complex, the glue-dipping mode has the problem of unstable connection between the voice coil and the diaphragm, which further leads to the sound quality defect of the loudspeaker, and also leads to the reduction of production efficiency and high cost. SUMMARY

[0003] Therefore, it is necessary to provide a diaphragm capable of simplifying structure and process and improving stability, and a loudspeaker with the diaphragm, aiming to ensure sound quality while improving production efficiency and reducing cost.

[0004] In an embodiment of the present application, a diaphragm is provided, which comprises a crystal and a film body. The crystal can form a magnetic field after being electrified. The film body is formed by solidification of a liquid injection material. The film body has a protruding portion on one side surface. The protruding portion is provided with a receiving groove. The crystal is located in the receiving groove. The top of the protruding portion has a shielding portion. The shielding portion is partially located above the receiving groove, for limiting the crystal and exposing part of the crystal. The crystal and the film body are connected in an integrated injection molding manner. The crystal can form a changing magnetic field by current change and interact with the environmental magnetic field to drive the film body to vibrate and emit sound.

[0005] In some embodiments, the shielding portion has two shielding portions respectively arranged on opposite sides of the protruding portion. The top surface of the crystal is provided with a first protrusion respectively at the other opposite sides close to the protruding portion. The shielding portion is provided with a second protrusion between the two first protrusions, which can limit the first protrusions.

[0006] In some embodiments, each shielding portion is provided with a notch at the first protrusion on one side. The notch exposes the end of the first protrusion. The two notches of the two shielding portions are respectively located on the opposite sides of the two shielding portions.

[0007] In some embodiments, the top of the protruding portion further has two limiting portions respectively connected between the two shielding portions. The limiting portions are used for limiting the crystal.

[0008] In an embodiment of the present application, a loudspeaker is also provided, which comprises a shell, a magnet, a connecting seat and a diaphragm as in any of the above embodiments. The magnet and the diaphragm are installed in the shell. The magnet can provide an environmental magnetic field. The crystal is conductively connected with the connecting seat. The connecting seat is partially arranged outside the shell and is used to provide an electrical connection interface.

[0009] In some embodiments, the loudspeaker further comprises a wire. The crystal is connected with the connecting seat through the wire.

[0010] In some embodiments, the loudspeaker further comprises a flexible circuit board, the flexible circuit board is mounted to the housing, the flexible circuit board is partially attached to the crystal, and the flexible circuit board is electrically connected to the connecting seat.

[0011] In some embodiments, the flexible circuit board comprises a frame, two curved portions and a straight portion, the two curved portions are respectively arranged on opposite sides of the frame, and the two ends of the straight portion are respectively connected to the curved portions on the corresponding sides, the crystal is attached to the straight portion, and the crystal can drive the straight portion and the curved portions to deform when the crystal vibrates.

[0012] In some embodiments, each curved portion comprises two first extension segments, two return segments, two second extension segments and an abutment segment, one end of each first extension segment is connected to the frame, and the other end of each first extension segment extends into the frame, one end of each return segment is connected to one first extension segment and the other end of each return segment is connected to one second extension segment, one end of each second extension segment extends towards the frame, and the two ends of the abutment segment are respectively connected to the two ends of the two second extension segments, and one end of the straight portion is connected to the abutment segment.

[0013] In some embodiments, the crystal has two, the frame and the diaphragm are rectangular in shape and have the same size, and the flexible circuit board, the diaphragm and the two crystals are symmetrically arranged along two center lines perpendicular to each other of the rectangle.

[0014] The diaphragm and the loudspeaker described above are connected by the crystal and the diaphragm in an integrated injection molding manner to achieve the purposes of simplifying the process, ensuring the connection between the crystal and the diaphragm, improving the production efficiency and reducing the processing cost, and further improving the stability of the structure by the structural design of the protruding portion and the shielding portion in the diaphragm to achieve the purpose of ensuring the sound quality. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 FIG. 1 is a perspective view of a diaphragm according to an embodiment of the present application.

[0016] Figure 2 FIG. 2 is a perspective view of another side of the diaphragm in FIG. 1. Figure 1

[0017] Figure 3 FIG. 3 is an exploded view of the diaphragm in FIG. 1. Figure 1

[0018] Figure 4 FIG. 4 is a sectional view of the diaphragm in FIG. 1 along IV-IV. Figure 1

[0019] Figure 5 FIG. 5 is a perspective view of a diaphragm according to another embodiment of the present application.

[0020] Figure 6 FIG. 6 is a perspective view of a loudspeaker according to an embodiment of the present application.

[0021] ​​​Figure 7 for Figure 6 A stereoscopic view of the central speaker from another perspective.

[0022] Figure 8 This is a perspective view of the flexible circuit board and diaphragm in one embodiment of this application.

[0023] Figure 9 for Figure 8 A 3D view of a flexible circuit board.

[0024] Figure 10 for Figure 6 Exploded view of the loudspeaker.

[0025] Figure 11 for Figure 10 An exploded view of the loudspeaker from another perspective.

[0026] Figure 12 for Figure 6 Cross-sectional view of the middle loudspeaker along XII-XII.

[0027] Explanation of main component symbols

[0028] Diaphragm 100

[0029] Crystal 10

[0030] First protrusion 11

[0031] Membrane 20

[0032] Fixed area 21

[0033] Vibration zone 22

[0034] 221 raised part

[0035] Containment tank 221a

[0036] Shielding part 222

[0037] Second protrusion 222a

[0038] Gap 222b

[0039] Limiting part 223

[0040] Transition Zone 23

[0041] Reinforcement layer 24

[0042] Speaker 200

[0043] Casing 30

[0044] Casing 31

[0045] Support platform 31a

[0046] Sound hole 31b

[0047] Inner shell 32

[0048] Exhaust hole 32a

[0049] Tuning mesh 32b

[0050] Magnet 40

[0051] Connecting seat 50

[0052] Flexible circuit board 60

[0053] Frame 61

[0054] Bent portion 62

[0055] First extension segment 62a

[0056] Back bending segment 62b

[0057] Second extension segment 62c

[0058] Butt joint segment 62d

[0059] Bent segment 62e

[0060] Straight portion 63

[0061] First adhesive 70

[0062] Second adhesive 80

[0063] Gasket 90 DETAILED DESCRIPTION

[0064] The technical solutions of the present application will be described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0065] It should be noted that when a component is referred to as being "fixed" to another component, it can be directly on the other component or there can be a middle component. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or there can be a middle component. When a component is referred to as being "disposed" on another component, it can be directly disposed on the other component or there can be a middle component. The terms "vertical", "horizontal", "left", "right", and the like used herein are for illustrative purposes only.

[0066] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0067] An embodiment of the present application provides a diaphragm, comprising a crystal and a membrane body, the crystal can form a magnetic field after being electrified. The membrane body is formed by solidification of liquid injection material, one side surface of the membrane body has a protruding part, the protruding part is provided with a receiving groove, the crystal is located in the receiving groove, the top of the protruding part has a shielding part, the shielding part is partially located above the receiving groove, and the shielding part is used for limiting the crystal and exposing part of the crystal. The crystal and the membrane body are connected in an integrated injection molding manner, the crystal can form a variable magnetic field through current change and interact with an environmental magnetic field to drive the membrane body to vibrate and emit sound.

[0068] An embodiment of the present application further provides a loudspeaker, comprising a shell, a magnet, a connecting seat and the diaphragm in any of the above embodiments, the magnet and the diaphragm are installed in the shell, the magnet can provide an environmental magnetic field, the crystal is electrically connected with the connecting seat, and the connecting seat is partially located outside the shell and is used for providing an electrical connection interface.

[0069] The diaphragm and the loudspeaker are connected in an integrated injection molding manner, so that the process is simplified, the connection between the crystal and the membrane body is ensured, the production efficiency is improved, and the processing cost is reduced. In addition, the structure stability of the diaphragm is further improved through the structural design of the protruding part and the shielding part in the membrane body, so that the sound quality is ensured.

[0070] Some embodiments of the present application are described in detail below with reference to the accompanying drawings. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0071] Please refer to Figures 1 to 3In an embodiment of the present application, a vibrating diaphragm 100 is provided for vibrating to emit sound. The vibrating diaphragm 100 comprises a crystal 10 and a membrane 20. The crystal 10 is capable of conducting electricity and generating a magnetic field corresponding to the current after being electrified. The membrane 20 is formed by solidifying a liquid injection material and is capable of deforming to generate vibration after solidification. The crystal 10 is capable of generating a changing magnetic field by changing the current, and interacting with the environmental magnetic field to generate a driving force, thereby driving the membrane 20 to generate vibration to emit sound. The crystal 10 and the membrane 20 are connected in an integrated injection molding manner, so that the crystal 10 and the membrane 20 can be stably connected, and the process can be simplified, thereby improving the processing efficiency of the vibrating diaphragm 100 and reducing the cost. As an exemplary example, the crystal 10 has a coil and / or a circuit capable of generating a magnetic field; the membrane 20 is made of liquid silicone rubber (LSR glue) material, which has the advantages of non-toxicity, good elasticity, heat resistance, transparency and fast curing, and is very suitable for injection molding of the crystal 10 and the membrane 20.

[0072] The membrane 20 comprises a fixed area 21, a vibrating area 22 and a transition area 23. The crystal 10 is arranged in the vibrating area 22. The vibrating area 22 is used for generating vibration to emit sound. The fixed area 21 is annular and surrounds the vibrating area 22. The fixed area 21 and the vibrating area 22 are connected through the transition area 23. The position of the fixed area 21 is fixed, thereby fixing the position of the membrane 20. The cross section of the transition area 23 is arc-shaped or bent, so that the connection between the edge of the vibrating area 22 and the fixed area 21 is more flexible and easier to deform or recover, thereby improving the sound quality of the vibration.

[0073] Please refer to Figure 3 and Figure 4 The surface of one side of the vibrating area 22 has a raised portion 221. The raised portion 221 is formed with a receiving groove 221a. The crystal 10 is located in the receiving groove 221a. The top surface of the raised portion 221 has a shielding portion 222. The shielding portion 222 is partially above the receiving groove 221a, and is used to limit the position of the crystal 10, so as to limit the crystal 10 in the receiving groove 221a and avoid the crystal 10 from falling out of the receiving groove 221a. The raised portion 221 and the shielding portion 222 are integrally formed by injection molding. As an exemplary example, the crystal 10 is a rectangular sheet. Since the crystal 10 is integrally formed by injection molding, the profile of the receiving groove 221a is the same as that of the crystal 10, the height of the top surface of the raised portion 221 is the same as the thickness of the crystal 10, that is, the top surface of the raised portion 221 is flush with the top surface of the crystal 10, the raised portion 221 plays a role of limiting the position of the crystal 10 along the XY plane direction, and the shielding portion 222 plays a role of further limiting the position of the crystal 10 along the direction perpendicular to the XY plane, thereby improving the connection stability of the crystal 10 and the membrane 20, so that the crystal 10 can more efficiently drive the membrane 20 to vibrate, thereby improving the sound quality.

[0074] In some embodiments, the shielding portion 222 has two, and the two shielding portions 222 are respectively arranged on the opposite sides of the protruding portion 221 along the X direction, and the two shielding portions 222 can cover the two side edges of the crystal 10 along the X direction to limit the crystal 10. There is a gap between the two shielding portions 222 to expose part of the crystal 10. The exposed part of the crystal 10 is used for electrical connection of wires or circuits to conduct current. As an exemplary example, the length of the two shielding portions 222 extends along the Y direction, wherein the Y direction is perpendicular to the X direction, and this structure plays a role in that when a plurality of crystals 10 are arranged on the film body 20, the plurality of crystals 10 can be arranged along the Y direction, so that the exposed parts of the plurality of crystals 10 are also arranged along the Y direction, and then the wires or circuits extending along the Y direction can be directly accessed in the subsequent process to conduct the plurality of crystals 10, thereby improving the processing efficiency.

[0075] In some embodiments, the top surface of the crystal 10 is respectively provided with a first protrusion 11 on the opposite sides along the Y direction. Because of the integral molding by injection molding, the gap between the two first protrusions 11 is filled with a second protrusion 222a, and the second protrusion 222a is located between the two first protrusions 11. The second protrusion 222a cooperates with the two first protrusions 11 to further limit the crystal 10 along the Y direction, thereby further improving the connection stability of the crystal 10 and the film body 20, so that the crystal 10 can more efficiently drive the film body 20 to vibrate to improve the sound quality. As an exemplary example, the first protrusion 11 can be the positive and negative electrode positions of the crystal 10.

[0076] Please refer to Figure 5 Further, in some embodiments, each shielding portion 222 is provided with a notch 222b at one first protrusion 11 on one side. The notch 222b can expose the end of the first protrusion 11 for electrical connection of wires or circuits, etc. Each of the two shielding portions 222 has a notch 222b, and the two notches 222b are respectively located on the opposite sides of the two shielding portions 222, i.e., the two notches 222b are not on the same X direction, so that the distance between the two notches 222b is maximized to facilitate the connection of other components and avoid short circuit.

[0077] Please refer to Figure 5 In some embodiments, the top of the protruding portion 221 also has two limiting portions 223, and the two limiting portions 223 are respectively connected between the two shielding portions 222. The limiting portion 223 is used to further limit the crystal 10 along the Y direction to improve the stability and sound quality of the crystal 10. Moreover, the height of the limiting portion 223 is equal to the height of the shielding portion 222 to simplify the structure and facilitate the integral molding by injection molding.

[0078] In some embodiments, the two shielding portions 222 cover only 10% or less of the area of ​​the upper surface of the crystal 10 to prevent the crystal 10 from being over-encased, allowing the crystal 10 to vibrate more efficiently and thus improving sound quality. In other embodiments, the shielding portions 222 can completely cover the entire crystal 10, thereby encasing the crystal 10 within the diaphragm 20 to improve the connection stability between the two.

[0079] Please see Figure 10 and Figure 11 In some embodiments, all crystals 10 are disposed on the same side of the membrane 20, and the side of the membrane 20 opposite to the crystals 10 has a reinforcing layer 24. The stiffness of the reinforcing layer 24 is greater than that of the membrane 20, so that the membrane 20 can better emit high-frequency sounds and avoid the membrane 20 being unable to vibrate at high frequencies due to being too soft. As an exemplary example, the reinforcing layer 24 is made of LCP plastic polymer material.

[0080] Please see Figure 6 and Figure 7 This application also provides a speaker 200, including a housing 30, a magnet 40, a connector 50, and a diaphragm 100. The magnet 40 and the diaphragm 100 are mounted inside the housing 30. The magnet 40 is used to provide an ambient magnetic field. A crystal 10 is electrically connected to the connector 50. The connector 50 is partially located outside the housing 30 and provides an interface for electrical connection so that the speaker 200 can be connected to other components. As an exemplary example, the speaker 200 is used in electronic devices such as mobile phones or tablet computers.

[0081] In some embodiments, the speaker 200 further includes a wire (not shown). The crystal 10 is connected to the connector 50 via the wire; that is, one end of the wire is connected to the crystal 10, and the other end is connected to the connector 50. The portion of the wire other than the end is not fixed to avoid affecting the vibration of the diaphragm 100. The wire can be connected to the position of the first protrusion 11 exposed by the notch 222b to improve processing efficiency.

[0082] In some embodiments, the speaker 200 further includes a flexible circuit board 60. The flexible circuit board 60 is mounted on the housing 30. The flexible circuit board 60 is partially attached to the crystal 10. The flexible circuit board 60 is partially electrically connected to the connector 50. The flexible circuit board 60 is used to electrically connect the crystal 10 and the connector 50. The flexible circuit board 60 is capable of deforming accordingly with the vibration of the diaphragm 100 to avoid affecting the vibration of the diaphragm 100.

[0083] Please see Figure 8 and Figure 9Further, in some embodiments, the flexible circuit board 60 comprises a frame 61, two bending parts 62 and a straight part 63 which are connected in series. The frame 61 is fixed to the shell 30. The two bending parts 62 are respectively arranged on opposite sides of the frame 61. The two ends of the straight part 63 are respectively connected to the corresponding bending parts 62, i.e. the straight part 63 is connected between the two bending parts 62. The crystal 10 is attached to the straight part 63. When the crystal 10 vibrates, it can drive the straight part 63 and the bending parts 62 to deform. As an exemplary example, the straight part 63 extends along the Y direction, the crystal 10 has two and is arranged along the Y direction, and in the case where the limiting part 223 is not provided, the width of the straight part 63 is less than or equal to the gap between the two shielding parts 222, so that the straight part 63 can be directly placed between the two shielding parts 222, so as to simultaneously conduct the two crystals 10, thereby improving the processing efficiency.

[0084] Further, in some embodiments, each bending part 62 comprises two first extension sections 62a, two return sections 62b, two second extension sections 62c and an abutting section 62d. The first extension section 62a and the second extension section 62c extend in a straight line. The two first extension sections 62a are connected to one end of the frame 61 and extend to the other end (parallelly) inside the frame 61. The two return sections 62b are respectively connected to the end of one first extension section 62a and connected to one second extension section 62c. The return section 62b is U-shaped and is used to change the extension direction of the first extension section 62a. The two second extension sections 62c extend (parallelly) to the frame 61 away from the return section 62b. The abutting section 62d is connected to the end of the two second extension sections 62c. One end of the straight part 63 is connected to the abutting section 62d. Among them, each second extension section 62c and the abutting section 62d are further connected by a bending section 62e, which is used to change the extension direction of the second extension section 62c, so as to connect the abutting section 62d by bending. This structure design can make the flexible circuit board 60 more easily cooperate with the deformation of the diaphragm 20, so as to ensure the sound quality emitted by the diaphragm 20, and effectively reduce the deformation of the root of the bending part 62 and the frame 61, thereby reducing the stress of the root, thereby improving the reliability and service life of the flexible circuit board 60.

[0085] In some embodiments, the frame 61 and the diaphragm 20 are rectangular in size. The flexible circuit board 60, the diaphragm 20 and the two crystals 10 are arranged symmetrically along the two center lines perpendicular to the rectangle, which plays a role in simplifying the structure and design, and facilitates the installation without distinguishing the direction, thereby improving the processing efficiency.

[0086] In some embodiments, the crystal 10, the diaphragm 20 and the flexible circuit board 60 can also be connected by integrally formed injection molding, that is, the diaphragm 20 directly fixes the crystal 10 and the flexible circuit board 60 together during injection molding, avoiding subsequent installation operations and improving processing efficiency.

[0087] Referring to Figure 10 and Figure 11 In some embodiments, the shell 30 includes an outer shell 31 and an inner shell 32 which have the same shape. The size of the outer shell 31 is slightly larger than that of the inner shell 32, so that the inner wall size of the outer shell 31 is equal to the outer wall size of the inner shell 32. The inner shell 32 and the outer shell 31 can be overlapped to form the entire shell 30, thereby facilitating installation. The outer shell 31 has a support 31a for supporting and fixing the fixed area 21 or the frame 61, thereby playing a role of fixing the diaphragm 20 and the flexible circuit board 60. In addition, the outer shell 31 has a sound hole 31b for transmitting sound. The inner shell 32 has an exhaust hole 32a for exhausting air to balance air pressure. Each exhaust hole 32a is provided with a sound adjusting net 32b to prevent impurities from entering the shell 30. The exhaust hole 32a has two and is symmetrically arranged on both sides of the inner shell 32 to more efficiently and evenly adjust the sound quality.

[0088] Referring to Figure 12 As an exemplary example, the fixed area 21 and the support 31a are connected by the first adhesive 70. The frame 61 is located on the side of the fixed area 21 away from the support 31a. The side of the frame 61 away from the fixed area 21 has the second adhesive 80. The side wall of the inner shell 32 contacts the second adhesive 80 to fix the outer shell 31, the diaphragm 20, the flexible circuit board 60 and the inner shell 32. Further, after the outer shell 31 and the inner shell 32 are overlapped, the inner shell 32 can be completely embedded in the outer shell 31, that is, the side wall of the outer shell 31 can wrap the side wall of the inner shell 32, avoiding the inner shell 32 from being separated from the outer shell 31 under external force and improving the structural stability. In addition, the magnet 40 is installed on the inner shell 32. The magnet 40 has three pieces which are connected by a gasket 90. The crystal 10 is arranged on the side of the diaphragm 20 close to the magnet 40 to improve the utilization effect of the environmental magnetic field.

[0089] In summary, the above-mentioned diaphragm 100 and loudspeaker 200 are connected by integrally formed injection molding of the crystal 10 and the diaphragm 20 to achieve the purposes of simplifying the process, ensuring the connection of the crystal 10 and the diaphragm 20, improving the production efficiency and reducing the processing cost. The structural stability is further improved by the structural design of the protruding part 221 and the shielding part 222 of the diaphragm 20, thereby achieving the purpose of ensuring the sound quality.

[0090] In addition, those skilled in the art should understand that the above implementation is only used to illustrate the present application, and is not used as a limitation to the present application, and as long as the above implementation is within the scope of the spirit of the present application, the appropriate changes and changes made to the above implementation are within the scope of the present application.

Claims

1. A diaphragm, characterized by, The application relates to a loudspeaker, which comprises a crystal, a film body and a shell. The crystal is in the shape of a rectangular sheet and can form a magnetic field after being electrified. The film body is formed by solidifying a liquid injection material, one side surface of the film body is provided with a raised portion, the raised portion is provided with a receiving groove, the crystal is located in the receiving groove, the top of the raised portion is provided with a shielding portion, the shielding portion is partially located above the receiving groove, the shielding portion limits the crystal and exposes part of the crystal. The crystal and the film body are connected by one-piece injection molding, the crystal can form a variable magnetic field by changing the electric current, and the crystal and the environment magnetic field interact to drive the film body to vibrate and emit sound. The shielding portion has two shielding portions, the two shielding portions are respectively arranged on opposite sides of the raised portion, a gap exists between the two shielding portions to expose part of the crystal, and the lengths of the two shielding portions extend in parallel along the Y direction. When a plurality of crystals are arranged on the film body, the plurality of crystals are arranged along the Y direction, so that the exposed parts of the plurality of crystals also extend along the Y direction.

2. The diaphragm of claim 1, wherein: The top surface of the crystal is provided with a first protrusion at each of the other two opposite sides close to the raised portion, a second protrusion is formed between the two first protrusions of the shielding portion, and the second protrusion limits the first protrusion.

3. A loudspeaker, characterized by: Each of the shielding portions is provided with a notch at the first protrusion on one side, the notch exposes the end of the first protrusion, and the two notches of the two shielding portions are respectively located on the opposite sides of the two shielding portions.

4. The loudspeaker of claim 3, wherein: The top of the raised portion is also provided with two limiting portions, the two limiting portions are respectively connected between the two shielding portions, and the limiting portions limit the crystal.

5. The loudspeaker of claim 3, wherein: The loudspeaker also comprises a magnet and a connecting seat, the magnet and the diaphragm are installed in the shell, the magnet can provide the environment magnetic field, the crystal is electrically connected with the connecting seat, and the connecting seat is partially arranged outside the shell and used for providing an electrical connection interface.

6. The loudspeaker of claim 5, wherein: The loudspeaker also comprises a wire, and the crystal is connected with the connecting seat through the wire.

7. The loudspeaker of claim 6, wherein: The loudspeaker also comprises a flexible circuit board, the flexible circuit board is installed on the shell, the flexible circuit board is partially attached to the crystal, and the flexible circuit board is partially electrically connected with the connecting seat. The flexible circuit board comprises a frame, two curved portions and a straight portion, the two curved portions are respectively arranged on opposite sides of the frame, the two ends of the straight portion are respectively connected with the corresponding curved portions, the crystal is attached to the straight portion, and the crystal can drive the straight portion and the curved portions to deform when the crystal vibrates. Each of the curved portions comprises two first extension segments, two return bending segments, two second extension segments and an abutting segment, one end of each of the first extension segments is connected with the frame, the other end of each of the first extension segments extends into the frame, one end of each of the return bending segments is connected with one of the first extension segments and the other end of each of the return bending segments is connected with one of the second extension segments, the other end of each of the second extension segments extends to the frame, the two ends of the abutting segment are respectively connected with the two ends of the two second extension segments, and one end of the straight portion is connected with the abutting segment.

8. The loudspeaker of claim 7, wherein: The two crystals have the same size as the frame and the membrane, and the flexible circuit board, the membrane and the two crystals are symmetrically arranged along two perpendicular center lines of the rectangle.

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