Loudspeaker and electronic device

Abstract

This application provides a speaker and an electronic device. The speaker includes a housing, a magnetic circuit assembly, a first diaphragm, a second diaphragm, a voice coil, a first adjustment component, and a second adjustment component. The housing has an inner cavity; the magnetic circuit assembly is located in the inner cavity and fastened to the housing, and the magnetic circuit assembly is provided with a magnetic gap; the first diaphragm and the second diaphragm are respectively located on two opposite sides of the magnetic circuit assembly, and a peripheral edge of the first diaphragm and a peripheral edge of the second diaphragm are both fastened to the housing; the voice coil is connected between the first diaphragm and the second diaphragm, and the voice coil is at least partially located in the magnetic gap; and the first adjustment component and the second adjustment component are respectively located on the two opposite sides of the magnetic circuit assembly, both the first adjustment component and the second adjustment component are at least partially aligned with the magnetic gap in a thickness direction of the speaker, the first adjustment component is fastened to the first diaphragm and / or the voice coil, the second adjustment component is fastened to the second diaphragm and / or the voice coil, and both the first adjustment component and the second adjustment component are magnetic members. The speaker and the electronic device have a better low-frequency radiation capability.

Description

[0001] This application claims priority to Chinese Patent Application No. 202410302090.3, filed with the China National Intellectual Property Administration on March 13, 2024 and entitled "SPEAKER AND ELECTRONIC DEVICE", which is incorporated herein by reference in its entirety.TECHNICAL FIELD

[0002] This application relates to the field of audio technologies, and in particular, to a speaker and an electronic device.BACKGROUND

[0003] As common electro-acoustic transducers, speakers are widely applied to various electronic devices (for example, terminals such as mobile phones and smart glasses). A smart glasses product usually uses a co-directional dual-diaphragm speaker. In the dual-diaphragm speaker, upper and lower diaphragms vibrate in a same direction, forming a dipole during radiation. Sound waves radiated by the upper and lower diaphragms cancel each other on a side of the glasses, so that directional sound emission can be implemented. This reduces lateral sound leakage from the glasses, and improves privacy of voice content. However, the co-directional dual-diaphragm speaker has a relatively poor low-frequency radiation capability and poor low-frequency sensitivity.SUMMARY

[0004] This application provides an electronic device and an electronic device including the speaker. The speaker and the electronic device provided in this application have a better low-frequency radiation capability.

[0005] According to a first aspect, a speaker is provided. The speaker includes a housing, a magnetic circuit assembly, a first diaphragm, a second diaphragm, a voice coil, a first adjustment component, and a second adjustment component. The housing has an inner cavity; the magnetic circuit assembly is located in the inner cavity and fastened to the housing, and the magnetic circuit assembly is provided with a magnetic gap; the first diaphragm and the second diaphragm are respectively located on two opposite sides of the magnetic circuit assembly, and a peripheral edge of the first diaphragm and a peripheral edge of the second diaphragm are both fastened to the housing; the voice coil is located between the first diaphragm and the second diaphragm and fastened to the first diaphragm and the second diaphragm, and the voice coil is at least partially located in the magnetic gap; and the first adjustment component and the second adjustment component are respectively located on the two opposite sides of the magnetic circuit assembly, booth the first adjustment component and the second adjustment component are at least partially aligned with the magnetic gap in a thickness direction of the speaker, the first adjustment component is fastened to the first diaphragm and / or the voice coil, the second adjustment component is fastened to the second diaphragm and / or the voice coil, and both the first adjustment component and the second adjustment component are magnetic members.

[0006] The speaker provided in this application includes the first adjustment component and the second adjustment component. Both the first adjustment component and the second adjustment component are magnetic members, and both the first adjustment component and the second adjustment component are at least partially aligned with the magnetic gap. Relative positions of the first adjustment component, the second adjustment component, and the magnetic gap are set, so that when the speaker works, an interaction force is formed between the first adjustment component and the magnetic gap, and an interaction force is formed between the second adjustment component and the magnetic gap. Superposition of the two forces enables the first adjustment component and the second adjustment component to provide a negative stiffness coefficient for the speaker, thereby reducing stiffness of a vibration assembly during vibration. In this way, a low-frequency radiation capability of the speaker can be enhanced, and low-frequency sensitivity of the speaker can be improved. In other words, low-frequency performance of the speaker is improved.

[0007] It may be understood that the second diaphragm, the magnetic circuit assembly, and the first diaphragm of the speaker are sequentially arranged in the thickness direction of the speaker. In some embodiments, the first diaphragm and the second diaphragm may be parallel to each other, and the first diaphragm and the second diaphragm are perpendicular to the thickness direction of the speaker. In the thickness direction of the speaker, a projection of the first adjustment component partially or completely overlaps a projection of the magnetic gap. A projection of the second adjustment component partially or completely overlaps the projection of the magnetic gap.

[0008] It may be understood that the first adjustment component may be fastened to the first diaphragm, or the first adjustment component may be fastened to the voice coil, or the first adjustment component may be fastened to both the first diaphragm and the voice coil. The second adjustment component may be fastened to the second diaphragm, or the second adjustment component may be fastened to the voice coil, or the second adjustment component may be fastened to both the second diaphragm and the voice coil.

[0009] In a possible implementation, the first adjustment component is located between the first diaphragm and the voice coil and fastened to the first diaphragm and the voice coil. In this case, the first adjustment component can be better aligned with the magnetic gap of the magnetic circuit assembly, and an alignment area between the first adjustment component and the magnetic gap is relatively large. When a position of the first adjustment component changes, a magnitude of the force between the first adjustment component and the magnetic gap is more sensitive to the change, which helps increase benefits of a negative stiffness system of the speaker.

[0010] In a possible implementation, the second adjustment component is located between the second diaphragm and the voice coil and fastened to the second diaphragm and the voice coil. In this case, the second adjustment component can be better aligned with the magnetic gap of the magnetic circuit assembly, and an alignment area between the second adjustment component and the magnetic gap is relatively large. When a position of the second adjustment component changes, a magnitude of the force between the second adjustment component and the magnetic gap is more sensitive to the change, which helps increase benefits of a negative stiffness system of the speaker.

[0011] In a possible implementation, the first adjustment component and / or the second adjustment component are / is made of soft iron. In this case, costs of the soft iron are relatively low, which helps reduce manufacturing costs of the speaker.

[0012] In a possible implementation, the magnetic gap includes a first sub-magnetic gap and a second sub-magnetic gap that are spaced apart, the first sub-magnetic gap and the second sub-magnetic gap are arranged in the thickness direction of the speaker, and a magnetic field direction of the first sub-magnetic gap is opposite to a magnetic field direction of the second sub-magnetic gap; and the voice coil includes a first side portion and a second side portion that are opposite and spaced apart, the first side portion is fastened to the first diaphragm and at least partially located in the first sub-magnetic gap, and the second side portion is fastened to the second diaphragm and at least partially located in the second sub-magnetic gap.

[0013] In this implementation, when the voice coil is energized, a current flows through the first side portion and the second side portion in opposite directions, but the magnetic field direction of the first sub-magnetic gap is opposite to the magnetic field direction of the second sub-magnetic gap. Therefore, the first side portion and the second side portion are subject to Ampere forces in a same direction in the magnetic field, and the voice coil can move along the direction of the Ampere forces. Therefore, motion consistency of the voice coil is relatively strong, and driving efficiency is relatively high.

[0014] In a possible implementation, the magnetic circuit assembly includes a first magnetic component and a second magnetic component, and the first magnetic component and the second magnetic component are arranged along the thickness direction of the speaker; the first magnetic component includes a first magnetic member and a second magnetic member that are spaced apart, an arrangement direction of the first magnetic member and the second magnetic member is perpendicular to the thickness direction of the speaker, polarities of opposing ends of the first magnetic member and the second magnetic member are opposite, and the first sub-magnetic gap is formed between the first magnetic member and the second magnetic member; and the second magnetic component includes a third magnetic member and a fourth magnetic member that are spaced apart, an arrangement direction of the third magnetic member and the fourth magnetic member is perpendicular to the thickness direction of the speaker, polarities of opposing ends of the third magnetic member and the fourth magnetic member are opposite, and the second sub-magnetic gap is formed between the third magnetic member and the fourth magnetic member.

[0015] In this implementation, a structure of the magnetic circuit assembly is relatively simple, and manufacturing costs of the speaker are relatively low.

[0016] In a possible implementation, the magnetic circuit assembly includes a first magnet, a second magnet, a first magnetic conductor, a second magnetic conductor, a third magnetic conductor, and a fourth magnetic conductor; the first magnet and the second magnet are spaced apart, with an arrangement direction perpendicular to the thickness direction of the speaker, and polarization directions of the first magnet and the second magnet are opposite and are both parallel to the thickness direction of the speaker; the first magnetic conductor is fastened to one side that is of the first magnet and that faces toward the first diaphragm, the second magnetic conductor is fastened to one side that is of the second magnet and that faces toward the first diaphragm, and the first sub-magnetic gap is located between the first magnetic conductor and the second magnetic conductor; and the third magnetic conductor is fastened to one side that is of the first magnet and that faces toward the second diaphragm, the fourth magnetic conductor is fastened to one side that is of the second magnet and that faces toward the second diaphragm, and the second sub-magnetic gap is located between the third magnetic conductor and the fourth magnetic conductor.

[0017] In this implementation, the first magnetic conductor and the second magnetic conductor may increase magnetic field strength of the first sub-magnetic gap. Under a same magnetic field strength condition of the first sub-magnetic gap, the first magnetic conductor and the second magnetic conductor enable the first magnet and the second magnet to be smaller in size, thereby facilitating miniaturization of the entire speaker. The third magnetic conductor and the fourth magnetic conductor may increase magnetic field strength of the second sub-magnetic gap. Under a same magnetic field strength condition of the second sub-magnetic gap, the third magnetic conductor and the fourth magnetic conductor enable the first magnet and the second magnet to be smaller in size, thereby facilitating miniaturization of the entire speaker.

[0018] In a possible implementation, there are a plurality of voice coils, an arrangement direction of the plurality of voice coils is parallel to a length direction of the speaker, the length direction of the speaker is perpendicular to the thickness direction of the speaker, and the plurality of voice coils are at least partially located in the same magnetic gap; or there are a plurality of magnetic gaps, the plurality of magnetic gaps are spaced apart in a width direction of the speaker, the width direction of the speaker is perpendicular to the thickness direction of the speaker, there are a plurality of voice coils, an arrangement direction of the plurality of voice coils is parallel to the width direction of the speaker, and the plurality of voice coils are disposed to correspond to different magnetic gaps.

[0019] In this implementation, the plurality of voice coils may be arranged by fully using space in the length direction of the speaker. This can reduce space occupied in the width direction of the speaker and facilitate miniaturization of the speaker in width, thereby obtaining a slender product form and making the speaker better suited for an elongated product, for example, an electronic device such as an electronic reading pen or a selfie stick. It may be understood that, in some other embodiments, an appropriate length-to-width ratio may be designed for the speaker based on an actual requirement, and a layout of a plurality of voice coils may be designed with reference to a length-to-width ratio of the speaker, to improve stability of the vibration assembly in a vibration process.

[0020] In a possible implementation, the magnetic gap includes a first sub-magnetic gap, a second sub-magnetic gap, a third sub-magnetic gap, and a fourth sub-magnetic gap that are spaced apart; an arrangement direction of the first sub-magnetic gap and the second sub-magnetic gap is perpendicular to the thickness direction of the speaker, and a magnetic field direction of the first sub-magnetic gap is opposite to a magnetic field direction of the second sub-magnetic gap; an arrangement direction of the third sub-magnetic gap and the fourth sub-magnetic gap is perpendicular to the thickness direction of the speaker, and a magnetic field direction of the third sub-magnetic gap is opposite to a magnetic field direction of the fourth sub-magnetic gap; an arrangement direction of the first sub-magnetic gap and the third sub-magnetic gap is parallel to the thickness direction of the speaker, and an arrangement direction of the second sub-magnetic gap and the fourth sub-magnetic gap is parallel to the thickness direction of the speaker; the voice coil includes a first sub-voice coil and a second sub-voice coil, and the first sub-voice coil and the second sub-voice coil are arranged along the thickness direction of the speaker; the first sub-voice coil includes a first side portion and a second side portion that are disposed opposite to each other, the first side portion is at least partially located in the first sub-magnetic gap, and the second side portion is at least partially located in the second sub-magnetic gap; and the second sub-voice coil includes a third side portion and a fourth side portion that are disposed opposite to each other, the third side portion is at least partially located in the third sub-magnetic gap, and the fourth side portion is at least partially located in the fourth sub-magnetic gap.

[0021] In this implementation, a plurality of sub-voice coils may be arranged by fully using space in the thickness direction of the speaker. This can reduce space occupied in the thickness direction of the speaker and facilitate miniaturization of the speaker in thickness, thereby making the speaker better suited for a thin flat product, for example, an electronic device such as a mobile phone, a smartwatch, or a tablet computer.

[0022] In a possible implementation, the magnetic circuit assembly includes a first magnetic component and a second magnetic component, and the first magnetic component and the second magnetic component are arranged along the thickness direction of the speaker; the first magnetic component includes a first magnetic member and a second magnetic member that are spaced apart, and a third magnetic member and a fourth magnetic member that are spaced apart, where an arrangement direction of the first magnetic member, the second magnetic member, the third magnetic member, and the fourth magnetic member is perpendicular to the thickness direction of the speaker, polarities of opposing ends of the first magnetic member and the second magnetic member are opposite, the first sub-magnetic gap is formed between the first magnetic member and the second magnetic member, polarities of opposing ends of the third magnetic member and the fourth magnetic member are opposite, and the second sub-magnetic gap is formed between the third magnetic member and the fourth magnetic member; and the second magnetic component includes a fifth magnetic member and a sixth magnetic member that are spaced apart, and a seventh magnetic member and an eighth magnetic member that are spaced apart, where an arrangement direction of the fifth magnetic member, the sixth magnetic member, the seventh magnetic member, and the eighth magnetic member is perpendicular to the thickness direction of the speaker, polarities of opposing ends of the fifth magnetic member and the sixth magnetic member are opposite, the third sub-magnetic gap is formed between the fifth magnetic member and the sixth magnetic member, polarities of opposing ends of the seventh magnetic member and the eighth magnetic member are opposite, and the fourth sub-magnetic gap is formed between the seventh magnetic member and the eighth magnetic member.

[0023] In this implementation, a structure of the magnetic circuit assembly is relatively simple, and manufacturing costs of the speaker are relatively low.

[0024] In a possible implementation, the magnetic circuit assembly includes a first magnet, a second magnet, a third magnet, a first magnetic conductor, a second magnetic conductor, a third magnetic conductor, a fourth magnetic conductor, a fifth magnetic conductor, and a sixth magnetic conductor; the first magnet, the second magnet, and the third magnet are spaced apart, with an arrangement direction perpendicular to the thickness direction of the speaker, polarization directions of the first magnet and the second magnet are opposite and both are parallel to the thickness direction of the speaker, and polarization directions of the second magnet and the third magnet are opposite and both are parallel to the thickness direction of the speaker; the first magnetic conductor is fastened to one side that is of the first magnet and that faces toward the first diaphragm, the second magnetic conductor is fastened to one side that is of the second magnet and that faces toward the first diaphragm, the third magnetic conductor is fastened to one side that is of the third magnet and that faces toward the first diaphragm, the first sub-magnetic gap is located between the first magnetic conductor and the second magnetic conductor, and the second sub-magnetic gap is located between the second magnetic conductor and the third magnetic conductor; and the fourth magnetic conductor is fastened to one side that is of the first magnet and that faces toward the second diaphragm, the fifth magnetic conductor is fastened to one side that is of the second magnet and that faces toward the second diaphragm, the sixth magnetic conductor is fastened to one side that is of the third magnet and that faces toward the second diaphragm, the third sub-magnetic gap is located between the fourth magnetic conductor and the fifth magnetic conductor, and the fourth sub-magnetic gap is located between the fifth magnetic conductor and the sixth magnetic conductor.

[0025] In this implementation, the first magnetic conductor and the second magnetic conductor may increase magnetic field strength of the first sub-magnetic gap. Under a same magnetic field strength condition of the first sub-magnetic gap, the first magnetic conductor and the second magnetic conductor enable the first magnet and the second magnet to be smaller in size, thereby facilitating miniaturization of the entire speaker. The second magnetic conductor and the third magnetic conductor may increase magnetic field strength of the second sub-magnetic gap. Under a same magnetic field strength condition of the second sub-magnetic gap, the second magnetic conductor and the third magnetic conductor enable the second magnet and the third magnet to be smaller in size, thereby facilitating miniaturization of the entire speaker. The fourth magnetic conductor and the fifth magnetic conductor may increase magnetic field strength of the third sub-magnetic gap. Under a same magnetic field strength condition of the third sub-magnetic gap, the fourth magnetic conductor and the fifth magnetic conductor enable the first magnet and the second magnet to be smaller in size, thereby facilitating miniaturization of the entire speaker. The fifth magnetic conductor and the sixth magnetic conductor may increase magnetic field strength of the fourth sub-magnetic gap. Under a same magnetic field strength condition of the fourth sub-magnetic gap, the fifth magnetic conductor and the sixth magnetic conductor enable the second magnet and the third magnet to be smaller in size, thereby facilitating miniaturization of the entire speaker.

[0026] In a possible implementation, the speaker further includes a bracket, where the bracket is located between the first sub-voice coil and the second sub-voice coil and fastened to the first sub-voice coil and the second sub-voice coil.

[0027] In this implementation, the bracket connects the first sub-voice coil and the second sub-voice coil, so that the first sub-voice coil and the second sub-voice coil may form a whole. After the first sub-voice coil and the second sub-voice coil are energized, the first sub-voice coil and the second sub-voice coil may vibrate synchronously as a whole, thereby helping improve vibration consistency and vibration stability of the vibration assembly.

[0028] In a possible implementation, the speaker further includes a first connector, the first connector includes a peripheral portion and a connection portion, the connection portion is located on an inner side of the peripheral portion and connected to the peripheral portion, the peripheral portion connects the housing and the first diaphragm, and the connection portion connects the first diaphragm and the voice coil.

[0029] In this implementation, the voice coil may be respectively connected to the first diaphragm and the second diaphragm by using the first connector and a second connector. In this way, vibration stability is better when the vibration assembly vibrates. In addition, the first connector and the second connector are respectively disposed on two sides of the voice coil, to ensure structural symmetry of the vibration assembly relative to the magnetic circuit assembly and achieve symmetric upward and downward vibration stiffness of the vibration assembly, thereby helping improve vibration stability of the vibration assembly. In addition, the first connector may further have a conductive property. The first connector is electrically connected to the voice coil, so that the voice coil may be electrically connected to a component outside the speaker by using the first connector.

[0030] In a possible implementation, the first diaphragm and the second diaphragm are symmetrically disposed with respect to the magnetic circuit assembly, and the first adjustment component and the second adjustment component are symmetrically disposed with respect to the magnetic circuit assembly. In this way, structural symmetry of the vibration assembly relative to the magnetic circuit assembly is ensured, and symmetric upward and downward vibration stiffness of the vibration assembly is achieved, thereby helping improve vibration stability of the vibration assembly.

[0031] In a possible implementation, there are a plurality of magnetic gaps, and the voice coil is arranged or not arranged in the magnetic gap aligned with the first adjustment component and / or the second adjustment component. In this case, positions of the components of the speaker are set more flexibly, which helps expand an applicable scope of the speaker.

[0032] According to a second aspect, a speaker is provided. The speaker includes a housing, a magnetic circuit assembly, a first diaphragm, a second diaphragm, a voice coil, and an adjustment component. The housing has an inner cavity; the magnetic circuit assembly is located in the inner cavity and fastened to the housing, the magnetic circuit assembly is provided with a first magnetic gap and a second magnetic gap that are spaced apart, and an arrangement direction of the first magnetic gap and the second magnetic gap is parallel to a thickness direction of the speaker; the first diaphragm and the second diaphragm are respectively located on two opposite sides of the magnetic circuit assembly, and a peripheral edge of the first diaphragm and a peripheral edge of the second diaphragm are both fastened to the housing; the voice coil is located between the first diaphragm and the second diaphragm, the voice coil includes a first portion and a second portion that are spaced apart, the first portion and the second portion are arranged in the thickness direction of the speaker, the first portion is fastened to the first diaphragm and at least partially located in the first magnetic gap, and the second portion is fastened to the second diaphragm and at least partially located in the second magnetic gap; and the adjustment component is located between the first portion and the second portion and fastened to the first portion and the second portion, the adjustment component is further located between the first magnetic gap and the second magnetic gap, and the adjustment component is a magnetic member.

[0033] The speaker provided in this application includes the adjustment component. The adjustment component is a magnetic member, and is located between the first magnetic gap and the second magnetic gap. Relative positions of the adjustment component, the first magnetic gap, and the second magnetic gap are set, so that when the speaker works, an interaction force is formed between the adjustment component and the first magnetic gap, and an interaction force is formed between the adjustment component and the second magnetic gap. Superposition of the two forces enables the adjustment component to provide a negative stiffness coefficient for the speaker, thereby reducing stiffness of a vibration assembly during vibration. In this way, a low-frequency radiation capability of the speaker can be enhanced, and low-frequency sensitivity of the speaker can be improved. In other words, low-frequency performance of the speaker is improved. It may be understood that the second diaphragm, the magnetic circuit assembly, and the first diaphragm of the speaker are sequentially arranged in the thickness direction of the speaker. In some embodiments, the first diaphragm and the second diaphragm may be parallel to each other, and the first diaphragm and the second diaphragm are perpendicular to the thickness direction of the speaker.

[0034] In a possible implementation, a magnetic field direction of the first magnetic gap is opposite to a magnetic field direction of the second magnetic gap, and a winding plane of the voice coil is parallel to the thickness direction of the speaker.

[0035] In this implementation, when the voice coil is energized, a current circulates through the first portion and the second portion, and directions of the current in the first portion and the second portion are opposite, but the magnetic field direction of the first magnetic gap is opposite to the magnetic field direction of the second magnetic gap. Therefore, the first portion and the second portion are subject to Ampere forces in a same direction in the magnetic field, and the voice coil can move along the direction of the Ampere forces. Therefore, motion consistency of the voice coil is relatively strong, and driving efficiency is relatively high. It may be understood that the winding plane of the voice coil is a plane on which the first portion and the second portion are located. When the voice coil is energized, the direction of the current in the voice coil is parallel to the winding plane of the voice coil.

[0036] In a possible implementation, the magnetic circuit assembly includes a first magnetic component and a second magnetic component, and the first magnetic component and the second magnetic component are arranged along the thickness direction of the speaker; the first magnetic component includes a first magnetic member and a second magnetic member that are spaced apart, and a third magnetic member and a fourth magnetic member that are spaced apart, where an arrangement direction of the first magnetic member, the second magnetic member, the third magnetic member, and the fourth magnetic member is perpendicular to the thickness direction of the speaker, polarities of opposing ends of the first magnetic member and the second magnetic member are opposite, the first sub-magnetic gap is formed between the first magnetic member and the second magnetic member, polarities of opposing ends of the third magnetic member and the fourth magnetic member are opposite, and the second sub-magnetic gap is formed between the third magnetic member and the fourth magnetic member; and the second magnetic component includes a fifth magnetic member and a sixth magnetic member that are spaced apart, and a seventh magnetic member and an eighth magnetic member that are spaced apart, where an arrangement direction of the fifth magnetic member, the sixth magnetic member, the seventh magnetic member, and the eighth magnetic member is perpendicular to the thickness direction of the speaker, polarities of opposing ends of the fifth magnetic member and the sixth magnetic member are opposite, the third sub-magnetic gap is formed between the fifth magnetic member and the sixth magnetic member, polarities of opposing ends of the seventh magnetic member and the eighth magnetic member are opposite, and the fourth sub-magnetic gap is formed between the seventh magnetic member and the eighth magnetic member. In this way, a structure of the magnetic circuit assembly is relatively simple, and manufacturing costs of the speaker are relatively low.

[0037] In a possible implementation, the magnetic circuit assembly includes a first magnet, a second magnet, a third magnet, a first magnetic conductor, a second magnetic conductor, a third magnetic conductor, a fourth magnetic conductor, a fifth magnetic conductor, and a sixth magnetic conductor; the first magnet, the second magnet, and the third magnet are spaced apart, with an arrangement direction perpendicular to the thickness direction of the speaker, polarization directions of the first magnet and the second magnet are opposite and both are parallel to the thickness direction of the speaker, and polarization directions of the second magnet and the third magnet are opposite and both are parallel to the thickness direction of the speaker; the first magnetic conductor is fastened to one side that is of the first magnet and that faces toward the first diaphragm, the second magnetic conductor is fastened to one side that is of the second magnet and that faces toward the first diaphragm, the third magnetic conductor is fastened to one side that is of the third magnet and that faces toward the first diaphragm, the first sub-magnetic gap is located between the first magnetic conductor and the second magnetic conductor, and the second sub-magnetic gap is located between the second magnetic conductor and the third magnetic conductor; and the fourth magnetic conductor is fastened to one side that is of the first magnet and that faces toward the second diaphragm, the fifth magnetic conductor is fastened to one side that is of the second magnet and that faces toward the second diaphragm, the sixth magnetic conductor is fastened to one side that is of the third magnet and that faces toward the second diaphragm, the third sub-magnetic gap is located between the fourth magnetic conductor and the fifth magnetic conductor, and the fourth sub-magnetic gap is located between the fifth magnetic conductor and the sixth magnetic conductor.

[0038] In a possible implementation, there are a plurality of voice coils, an arrangement direction of the plurality of voice coils is parallel to a length direction of the speaker, the length direction of the speaker is perpendicular to the thickness direction of the speaker, and the plurality of voice coils are at least partially located in the same magnetic gap; or there are a plurality of magnetic gaps, the plurality of magnetic gaps are spaced apart in a width direction of the speaker, the width direction of the speaker is perpendicular to the thickness direction of the speaker, there are a plurality of voice coils, an arrangement direction of the plurality of voice coils is parallel to the width direction of the speaker, and the plurality of voice coils are at least partially located in the plurality of magnetic gaps and correspond to the plurality of magnetic gaps on a one-to-one basis.

[0039] In this implementation, the plurality of voice coils may be designed with reference to an actual length of the speaker, and a more appropriate length-to-width ratio may be designed, so that the plurality of voice coils constitute the vibration assembly, thereby improving stability of the vibration assembly in a vibration process. In addition, the plurality of voice coils may be arranged by fully using space in the length direction of the speaker. This can reduce space occupied in the width direction of the speaker and facilitate miniaturization of the speaker in width, thereby making the speaker better suited for an elongated product, for example, an electronic device such as a point reader or a selfie stick.

[0040] In a possible implementation, the first magnetic gap includes a first sub-magnetic gap and a second sub-magnetic gap that are spaced apart, an arrangement direction of the first sub-magnetic gap and the second sub-magnetic gap is perpendicular to the thickness direction of the speaker, and a magnetic field direction of the first sub-magnetic gap is opposite to a magnetic field direction of the second sub-magnetic gap; the second magnetic gap includes a third sub-magnetic gap and a fourth sub-magnetic gap that are spaced apart, an arrangement direction of the third sub-magnetic gap and the fourth sub-magnetic gap is perpendicular to the thickness direction of the speaker, and a magnetic field direction of the third sub-magnetic gap is opposite to a magnetic field direction of the fourth sub-magnetic gap; the first sub-magnetic gap and the third sub-magnetic gap are spaced apart, with an arrangement direction parallel to the thickness direction of the speaker, and the second sub-magnetic gap and the fourth sub-magnetic gap are spaced apart, with an arrangement direction parallel to the thickness direction of the speaker; and the first portion is a first sub-voice coil, and the second portion is a second sub-voice coil, where the first sub-voice coil includes a first side portion and a second side portion that are opposite to each other, the first side portion is at least partially located in the first sub-magnetic gap, and the second side portion is at least partially located in the second sub-magnetic gap; and the second sub-voice coil includes a third side portion and a fourth side portion that are opposite to each other, the third side portion is at least partially located in the third sub-magnetic gap, and the fourth side portion is at least partially located in the fourth sub-magnetic gap.

[0041] In this implementation, a plurality of sub-voice coils may be arranged by fully using space in the thickness direction of the speaker. This can reduce space occupied in the thickness direction of the speaker and facilitate miniaturization of the speaker in thickness, thereby making the speaker better suited for a thin flat product, for example, an electronic device such as a mobile phone, a smartwatch, or a tablet computer.

[0042] In a possible implementation, the magnetic circuit assembly includes a first magnetic component and a second magnetic component, and the first magnetic component and the second magnetic component are arranged along the thickness direction of the speaker; the first magnetic component includes a first magnetic member and a second magnetic member that are spaced apart, and a third magnetic member and a fourth magnetic member that are spaced apart, where an arrangement direction of the first magnetic member, the second magnetic member, the third magnetic member, and the fourth magnetic member is perpendicular to the thickness direction of the speaker, polarities of opposing ends of the first magnetic member and the second magnetic member are opposite, the first sub-magnetic gap is formed between the first magnetic member and the second magnetic member, polarities of opposing ends of the third magnetic member and the fourth magnetic member are opposite, and the second sub-magnetic gap is formed between the third magnetic member and the fourth magnetic member; and the second magnetic component includes a fifth magnetic member and a sixth magnetic member that are spaced apart, and a seventh magnetic member and an eighth magnetic member that are spaced apart, where an arrangement direction of the fifth magnetic member, the sixth magnetic member, the seventh magnetic member, and the eighth magnetic member is perpendicular to the thickness direction of the speaker, polarities of opposing ends of the fifth magnetic member and the sixth magnetic member are opposite, the third sub-magnetic gap is formed between the fifth magnetic member and the sixth magnetic member, polarities of opposing ends of the seventh magnetic member and the eighth magnetic member are opposite, and the fourth sub-magnetic gap is formed between the seventh magnetic member and the eighth magnetic member. In this way, a structure of the magnetic circuit assembly is relatively simple, and manufacturing costs of the speaker are relatively low.

[0043] In a possible implementation, the magnetic circuit assembly includes a first magnet, a second magnet, a third magnet, a first magnetic conductor, a second magnetic conductor, a third magnetic conductor, a fourth magnetic conductor, a fifth magnetic conductor, and a sixth magnetic conductor; the first magnet, the second magnet, and the third magnet are spaced apart, with an arrangement direction perpendicular to the thickness direction of the speaker, polarization directions of the first magnet and the second magnet are opposite and both are parallel to the thickness direction of the speaker, and polarization directions of the second magnet and the third magnet are opposite and both are parallel to the thickness direction of the speaker; the first magnetic conductor is fastened to one side that is of the first magnet and that faces toward the first diaphragm, the second magnetic conductor is fastened to one side that is of the second magnet and that faces toward the first diaphragm, the third magnetic conductor is fastened to one side that is of the third magnet and that faces toward the first diaphragm, the first sub-magnetic gap is located between the first magnetic conductor and the second magnetic conductor, and the second sub-magnetic gap is located between the second magnetic conductor and the third magnetic conductor; and the fourth magnetic conductor is fastened to one side that is of the first magnet and that faces toward the second diaphragm, the fifth magnetic conductor is fastened to one side that is of the second magnet and that faces toward the second diaphragm, the sixth magnetic conductor is fastened to one side that is of the third magnet and that faces toward the second diaphragm, the third sub-magnetic gap is located between the fourth magnetic conductor and the fifth magnetic conductor, and the fourth sub-magnetic gap is located between the fifth magnetic conductor and the sixth magnetic conductor.

[0044] In this implementation, the first magnetic conductor and the second magnetic conductor may increase magnetic field strength of the first sub-magnetic gap. Under a same magnetic field strength condition of the first sub-magnetic gap, the first magnetic conductor and the second magnetic conductor enable the first magnet and the second magnet to be smaller in size, thereby facilitating miniaturization of the entire speaker. The second magnetic conductor and the third magnetic conductor may increase magnetic field strength of the second sub-magnetic gap. Under a same magnetic field strength condition of the second sub-magnetic gap, the second magnetic conductor and the third magnetic conductor enable the second magnet and the third magnet to be smaller in size, thereby facilitating miniaturization of the entire speaker. The fourth magnetic conductor and the fifth magnetic conductor may increase magnetic field strength of the third sub-magnetic gap. Under a same magnetic field strength condition of the third sub-magnetic gap, the fourth magnetic conductor and the fifth magnetic conductor enable the first magnet and the second magnet to be smaller in size, thereby facilitating miniaturization of the entire speaker. The fifth magnetic conductor and the sixth magnetic conductor may increase magnetic field strength of the fourth sub-magnetic gap. Under a same magnetic field strength condition of the fourth sub-magnetic gap, the fifth magnetic conductor and the sixth magnetic conductor enable the second magnet and the third magnet to be smaller in size, thereby facilitating miniaturization of the entire speaker.

[0045] According to a third aspect, an electronic device is provided and includes a housing and the foregoing speaker, where the speaker is accommodated inside the housing. The electronic device having the speaker has a better low-frequency radiation capability.BRIEF DESCRIPTION OF DRAWINGS

[0046] To describe the technical solutions in embodiments of this application or in the background more clearly, the following briefly describes the accompanying drawings for describing embodiments of this application or the background. FIG. 1 is a diagram of a structure of an electronic device according to an embodiment of this application; FIG. 2 is a diagram of a structure of a temple shown in FIG. 1 in some embodiments; FIG. 3 is a diagram of a structure of a speaker according to some embodiments of this application; FIG. 4 is a schematic exploded view of a partial structure of the speaker shown in FIG. 3; FIG. 5 is a schematic view of a cross-sectional structure of the speaker shown in FIG. 3 in an A-A direction; FIG. 6 is a schematic view of a cross-sectional structure of the speaker shown in FIG. 3 in a B-B direction; FIG. 7 is a cross-sectional view of a partial structure of the speaker shown in FIG. 3 in a state in the A-A direction; FIG. 8 is a cross-sectional view of a partial structure of the speaker shown in FIG. 3 in another state in the A-A direction; FIG. 9 is a cross-sectional view of a partial structure of the speaker shown in FIG. 3 in another state in the A-A direction; FIG. 10A is a schematic view of a cross-sectional structure of the speaker shown in FIG. 3 in another embodiment in the A-A direction; FIG. 10B is a schematic view of a cross-sectional structure of the speaker shown in FIG. 3 in another embodiment in the B-B direction; FIG. 11 is a schematic view of a cross-sectional structure of the speaker shown in FIG. 3 in another embodiment in the A-A direction; FIG. 12 is a diagram of a structure of the speaker shown in FIG. 3 in another embodiment; FIG. 13 is a schematic exploded view of a partial structure of the speaker shown in FIG. 12; FIG. 14 is a diagram of a structure of a magnetic circuit assembly shown in FIG. 13 in an embodiment; FIG. 15 is a diagram of a cross-sectional structure of the speaker shown in FIG. 12 in a C-C direction; FIG. 16 is a diagram of a cross-sectional structure of the speaker shown in FIG. 12 in a D-D direction; FIG. 17 is a cross-sectional view of a partial structure of the speaker shown in FIG. 12 in a state in the C-C direction; FIG. 18 is a cross-sectional view of a partial structure of the speaker shown in FIG. 12 in another state in the C-C direction; FIG. 19 is a schematic view of a cross-sectional structure of the speaker shown in FIG. 12 in another embodiment in the C-C direction; FIG. 20 is a schematic view of a cross-sectional structure of the speaker shown in FIG. 12 in another embodiment in the C-C direction; FIG. 21 is a schematic view of a cross-sectional structure of the speaker shown in FIG. 12 in another embodiment in the C-C direction; FIG. 22 is a diagram of a structure of the speaker shown in FIG. 3 in another embodiment; FIG. 23 is a schematic exploded view of a partial structure of the speaker shown in FIG. 22; FIG. 24 is a diagram of a cross-sectional structure of the speaker shown in FIG. 22 in an E-E direction; FIG. 25 is a diagram of a cross-sectional structure of the speaker shown in FIG. 22 in an F-F direction; FIG. 26 is a cross-sectional view of a partial structure of the speaker shown in FIG. 22 in a state in the E-E direction; FIG. 27 is a cross-sectional view of a partial structure of the speaker shown in FIG. 22 in another state in the E-E direction; FIG. 28 is a schematic view of a cross-sectional structure of the speaker shown in FIG. 22 in another embodiment in the E-E direction; FIG. 29 is a frequency response curve of a speaker at same operating power in different implementation solutions; FIG. 30 is a schematic view of a cross-sectional structure of the speaker shown in FIG. 22 in another embodiment in the E-E direction; and FIG. 31 is a schematic view of a cross-sectional structure of the speaker shown in FIG. 22 in another embodiment in the E-E direction. DESCRIPTION OF EMBODIMENTS

[0047] The following describes embodiments of this application with reference to the accompanying drawings in embodiments of this application.

[0048] In the descriptions of embodiments of this application, it should be noted that terms "installation" and "connection" should be understood in a broad sense unless there is a clear stipulation and limitation. For example, the "connection" may be a detachable connection, a nondetachable connection, a direct connection, or an indirect connection through an intermediate medium. A "fixed connection" means a connection to each other with an unchanged relative position relationship. A "rotatable connection" means a connection to each other in a relatively rotatable manner. Orientation terms mentioned in embodiments of this application, for example, "up", "down", "top", "bottom", "inside", and "outside", are merely directions based on the accompanying drawings. Therefore, the orientation terms are used to better and more clearly describe and understand embodiments of this application, instead of indicating or implying that a specified apparatus or element should have a specific orientation and be constructed and operated in a specific orientation. Therefore, this cannot be understood as a limitation on embodiments of this application. The terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh", "eighth", and the like in embodiments of this application are merely used for descriptive purposes, and shall not be construed as indicating or implying relative importance or implicitly specifying a quantity of technical features indicated. Therefore, a feature defined by "first", "second", "third", "fourth", "fifth", "sixth", "seventh", "eighth", or the like may explicitly or implicitly include one or more features. The term "and / or" in embodiments of this application describes only an association relationship between associated objects and represents that three relationships may exist. For example, A and / or B may represent the following three cases: Only A exists, both A and B exist, and only B exists. In addition, the character " / " in this specification usually indicates an "or" relationship between associated objects. Reference to "some embodiments" or the like described in this specification indicates that one or more embodiments of this application include a specific feature, structure, or characteristic described with reference to embodiments. Therefore, statements such as "in some embodiments" and "in other embodiments" that appear at different places in this specification do not necessarily refer to a same embodiment. Instead, the statements mean "one or more but not all of embodiments", unless otherwise specifically emphasized in another manner. The terms "include", "have", and variants of the terms all mean "include but are not limited to", unless otherwise specifically emphasized in another manner. It may be understood that specific embodiments described herein are merely used to explain related embodiments, but are not intended to limit embodiments. In addition, it should be noted that, for ease of description, only a part related to embodiments is shown in the accompanying drawings. In embodiments of this application, the terms "parallel", "perpendicular", and the like are all defined with respect to a current process level, but are not absolutely strictly defined in a mathematical sense. Minor deviations are allowed, and approximations such as "approximately parallel" and "approximately perpendicular" are also acceptable. For example, that A is parallel to B means that A is parallel or approximately parallel to B, and an included angle between A and B is allowed to be 0 degrees to 10 degrees. For example, that A is perpendicular to B means that A is perpendicular or approximately perpendicular to B, and an included angle between A and B is allowed to be 80 degrees to 100 degrees. The term "plurality of" means at least two.

[0049] It should be noted that embodiments and features in embodiments in this application may be combined with each other in absence of conflicts.

[0050] This application is described below in detail with reference to the accompanying drawings by using embodiments.

[0051] Refer to FIG. 1. FIG. 1 is a diagram of a structure of an electronic device 1000 according to an embodiment of this application.

[0052] In some embodiments, the electronic device 1000 may be an electronic device 1000 that needs to output audio by using a speaker, such as augmented reality (augmented reality, AR) glasses, an AR helmet, virtual reality (virtual reality, VR) glasses, an electronic reading pen, a selfie stick, a band, a mobile phone, a smartwatch, or a tablet computer. In this application, an example in which the electronic device 1000 is AR glasses is used for specific description.

[0053] In this embodiment, the electronic device 1000 includes a frame 10, a display component 20, a speaker 30, and a circuit board 40. The display component 20, the speaker 30, and the circuit board 40 are all mounted on the frame 10. Both the display component 20 and the speaker 30 are electrically connected to the circuit board 40. The circuit board 40 is configured to control the display component 20 to perform display and control the speaker 30 to emit sound.

[0054] For example, the frame 10 includes a frame front 11 and a temple 12 connected to the frame front 11. There are two temples 12, and the two temples 12 are connected to two opposite ends of the frame front 11. It should be noted that, in another embodiment, the frame 10 may include a frame front 11 and a fixing strap connected to the frame front 11. This is not specifically limited in this application.

[0055] The frame front 11 may include two frame bodies 111 and a bridge 112 connected between the two frame bodies 111. An accommodating cavity is provided in each of the two frame bodies 111 and configured to accommodate electronic components of the electronic device 1000. The bridge 112 and the two frame bodies 111 are integrally formed, to simplify a process of forming the frame front 11, and increase overall strength of the frame front 11. A material of the frame front 11 includes but is not limited to metal, plastic, resin, a natural material, or the like. It should be understood that the frame front 11 is not limited to a full-frame type shown in FIG. 1, and may alternatively be of a half-frame type or a rimless type.

[0056] In this embodiment, there are two display components 20, and structures of the two display components 20 are the same. Specifically, the two display components 20 are respectively mounted on the two frame bodies 111 of the frame front 11. When the electronic device 1000 is worn on the head of a user, one display component 20 corresponds to the left eye of the user, and the other display component 20 corresponds to the right eye of the user. In this case, the two eyes of the user may view a virtual scene or a real scene by using the two display components 20. It should be noted that, in another embodiment, structures of the two display components 20 may alternatively be different, or there may be one or more display components 20. This is not specifically limited in this application.

[0057] In this embodiment, the display component 20 is mounted on the frame body 111 and is electrically connected to the circuit board 40. In this embodiment, the circuit board 40 may be mounted inside the temple 12. There may be two circuit boards 40. The two circuit boards 40 are respectively located in the two temples 12, and are electrically connected to the display components 20 corresponding to the two circuit boards 40. Certainly, in another implementation, there may alternatively be one circuit board 40, and the circuit board 40 is located in one of the temples 12.

[0058] Certainly, in an implementation scenario of another embodiment, the circuit board 40 may be further mounted on the frame body 111, or mounted in the accommodating cavity of the frame body 111.

[0059] The two temples 12 are rotatably connected to the two opposite ends of the frame front 11. Specifically, the two temples 12 are respectively rotatably connected to the two frame bodies 111 of the frame front 11. When the electronic device 1000 is in an unfolded state (as shown in FIG. 1), the two temples 12 are rotated relative to the frame front 11 to face each other. In this case, the two temples 12 of the electronic device 1000 may respectively rest on two ears of the user, and the bridge 112 rests on a nasal bridge of the user, so that the electronic device 1000 is worn on the head of the user. When the electronic device 1000 is in a folded state, the two temples 12 are rotated relative to the frame front 11 until the two temples 12 at least partially overlap each other and are contained on an inner side of the frame front 11. In this case, the electronic device 1000 may be stored.

[0060] In this embodiment of this application, orientation terms such as "inner side" and "outer side" used when the electronic device 1000 is mentioned in this application are mainly described based on an orientation of the electronic device 1000 when the user wears the electronic device 1000 on the head. When the electronic device 1000 is worn by the user, the inner side is close to the head of the user, and the outer side is away from the head of the user. This does not constitute a limitation on an orientation of the electronic device 1000 in another scenario.

[0061] In another embodiment, the two temples 12 may be respectively fastened to the two frame bodies 111, or the two temples 12 and the frame front 11 may be integrally formed, that is, the electronic device 1000 is always in the unfolded state. This is not specifically limited in this application.

[0062] It may be understood that the two temples 12 in this embodiment have a same structure. The following uses one of the temples 12 as an example to describe a structure of the temple 12. Certainly, in another embodiment, structures of the two frame temples 12 may alternatively be different.

[0063] Refer to FIG. 1 and FIG. 2. FIG. 2 is a diagram of a structure of the temple 12 shown in FIG. 1 in some embodiments.

[0064] In some embodiments, the temple 12 may include a connection segment 121, a middle segment 122, and an ear-hook segment 123. The connection segment 121, the middle segment 122, and the ear-hook segment 123 are sequentially connected. One side that is of the connection segment 121 and that is far away from the middle segment 122 may be rotatably connected to the corresponding frame body 111, and the ear-hook segment 123 is configured to wear the temple 12 above an ear of the user. The middle segment 122 is provided with an accommodating cavity and a sound-emitting hole 1223 that communicates with the accommodating cavity. The speaker 30 is mounted in the accommodating cavity. Sound emitted by the speaker 30 may be transmitted out of the accommodating cavity through the sound-emitting hole 1223 and received by the ear of the user. In other words, the temple 12 is equivalent to a housing configured to accommodate the speaker 30 for the electronic device 1000.

[0065] In this embodiment, the middle segment 122 may protrude relatively downward, and the protruding portion is close to an external auditory canal of the user, so that the sound-emitting hole 1223 can be closer to the ear of the user. Therefore, sound emitted by the speaker 30 directly enters the external auditory canal of the user after being transmitted through the sound-emitting hole 1223, and the user can quickly hear the sound emitted by the speaker 30. Certainly, in another embodiment, the middle segment 122 may not protrude downward.

[0066] In this embodiment, there are two sound-emitting holes 1223. The two sound-emitting holes 1223 are located on two opposite sides of the middle segment 122, and sound output directions of the two sound-emitting holes 1223 are opposite. One sound-emitting hole 1223 is provided on one side that is of the middle segment 122 and that is close to the ear of the user. This is more conducive to outputting sound of the speaker 30 to the ear of the user, thereby improving audio-visual function experience of the electronic device 1000. In another embodiment, an included angle may be formed between the sound output directions of the two sound-emitting holes 1223.

[0067] In this embodiment, there are two speakers 30, and the two speakers 30 are separately disposed in the accommodating cavities of the temples 12 corresponding to the two speakers 30. Specifically, when the user wears the electronic device 1000, the accommodating cavity may be located in front of and above the ear of the user. When the speaker 30 emits sound, the ear of the user can hear the sound more clearly and intuitively. Certainly, in another embodiment, the speaker 30 may alternatively be disposed at another position, for example, the connection segment 121, the ear-hook segment 123, or the frame body 111.

[0068] When the user wears the AR glasses, a virtual reality picture may be transmitted to the two eyes of the user through the display components 20, and sound emitted by the speaker 30 can be transmitted out of the electronic device 1000 through the sound-emitting hole, so that an audio-visual function of the electronic device 1000 is implemented.

[0069] It may be understood that, in this embodiment, the speakers 30 disposed in the two temples 12 have a same structure. Certainly, in another embodiment, structures of the speakers 30 disposed in the two temples 12 may alternatively be different.

[0070] The circuit board 40 integrates a processor, a memory, and various other circuit components. The display component 20 and the speaker are coupled to the processor. The processor may include one or more processing units. For example, the processor may include an application processor (application processor, AP), a modem processor, a graphics processing unit (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), a controller, a video codec, a digital signal processor (digital signal processor, DSP), a baseband processor, and / or a neural-network processing unit (neural-network processing unit, NPU). Different processing units may be independent components, or may be integrated into one or more processors.

[0071] The processor may generate an operation control signal based on instruction operation code and a time sequence signal, to control instruction fetching and instruction execution.

[0072] An internal memory may be further disposed in the processor, and is configured to store instructions and data. In some embodiments, the memory in the processor may be a cache memory. The memory may store instructions or data used by the processor or frequently used by the processor. If the processor needs to use the instructions or the data, the processor may directly invoke the instructions or the data from the memory. Therefore, repeated access is avoided, waiting time of the processor is reduced, and system efficiency is improved.

[0073] In some embodiments, the processor may include one or more interfaces. The interface may include an inter-integrated circuit (inter-integrated circuit, I2C) interface, an inter-integrated circuit sound (inter-integrated circuit sound, I2S) interface, a pulse code modulation (pulse code modulation, PCM) interface, a universal asynchronous receiver / transmitter (universal asynchronous receiver / transmitter, UART) interface, a mobile industry processor interface (mobile industry processor interface, MIPI), a general-purpose input / output (general-purpose input / output, GPIO) interface, a subscriber identity module (subscriber identity module, SIM) interface, a universal serial bus (universal serial bus, USB) interface, and / or the like. The processor may be connected to a module such as a touch sensor, a wireless communication module, a display, or a camera through at least one of the foregoing interfaces.

[0074] The memory may be configured to store computer-executable program code. The executable program code includes instructions. The memory may include a program storage area and a data storage area. The program storage area may store an operating system, an application required by at least one function (for example, a photographing function or a recording function), and the like. The data storage area may store data (for example, image data and video data) and the like created when the electronic device 1000 is used. In addition, the memory may include a high-speed random access memory, and may further include a nonvolatile memory, for example, at least one magnetic disk storage device, a flash memory, or a universal flash storage (universal flash storage, UFS).

[0075] The processor executes various function methods or data processing of the electronic device 1000 by running the instructions stored in the memory and / or the instructions stored in the memory disposed in the processor, for example, enabling the display component 20 to present a virtual reality picture, and enabling the speaker 30 to emit sound.

[0076] In this embodiment, the speaker 30 mounted in the accommodating cavity of the middle segment 122 has a plurality of different embodiments. The following describes some embodiments of the speaker 30 in detail.

[0077] Refer to FIG. 3, FIG. 4, and FIG. 5. FIG. 3 is a diagram of a structure of a speaker 30 according to some embodiments of this application. FIG. 4 is a schematic exploded view of a partial structure of the speaker 30 shown in FIG. 3. FIG. 5 is a schematic view of a cross-sectional structure of the speaker 30 shown in FIG. 3 in an A-A direction. For ease of description, a width direction of the speaker 30 in FIG. 3 is defined as an X-axis direction, a length direction of the speaker 30 is defined as a Y-axis direction, and a thickness direction of the speaker 30 is defined as a Z-axis direction. The X-axis direction, the Y-axis direction, and the Z-axis direction are perpendicular to each other.

[0078] In some embodiments, the speaker 30 may include a housing 31, a magnetic circuit assembly 32, a first diaphragm 331, a second diaphragm 332, a voice coil 34, a first adjustment component 351, and a second adjustment component 352. The housing 31 has an inner cavity 311, and the magnetic circuit assembly 32 is located in the inner cavity 311. The magnetic circuit assembly 32 is provided with a magnetic gap 320.

[0079] The first diaphragm 331 and the second diaphragm 332 are respectively located on two opposite sides of the magnetic circuit assembly 32, and a peripheral edge of the first diaphragm 331 and a peripheral edge of the second diaphragm 332 are both fastened to the housing 31. The second diaphragm 332, the magnetic circuit assembly 32, and the first diaphragm 331 are sequentially arranged in the thickness direction (that is, the Z-axis direction) of the speaker 30. For example, the first diaphragm 331 and the second diaphragm 332 may be parallel to each other, and the first diaphragm 331 and the second diaphragm 332 are perpendicular to the thickness direction of the speaker 30.

[0080] The voice coil 34 is located between the first diaphragm 331 and the second diaphragm 332 and fastened to the first diaphragm 331 and the second diaphragm 332. The voice coil 34 is at least partially located in the magnetic gap 320. It may be understood that the voice coil 34 may be partially located in the magnetic gap 320, or the voice coil 34 may be completely located in the magnetic gap 320.

[0081] In this embodiment, the first adjustment component 351 and the second adjustment component 352 are located in the inner cavity 311, and the first adjustment component 351 and the second adjustment component 352 are respectively located on the two opposite sides of the magnetic circuit assembly 32. Both the first adjustment component 351 and the second adjustment component 352 are at least partially aligned with the magnetic gap 320 in the thickness direction of the speaker 30. It may be understood that, in the thickness direction of the speaker 30, a projection of the first adjustment component 351 partially or completely overlaps a projection of the magnetic gap 320. A projection of the second adjustment component 352 partially or completely overlaps the projection of the magnetic gap 320.

[0082] In this embodiment of this application, there may be one or more magnetic gaps 320. When there is one magnetic gap 320, the voice coil 34 is arranged in the magnetic gap 320 aligned with the first adjustment component 351 and the second adjustment component 352. When there are a plurality of magnetic gaps 320, the voice coil 34 may be arranged in the magnetic gap 320 aligned with the first adjustment component 351 and / or the second adjustment component 352, or the voice coil 34 may not be arranged (that is, the voice coil 34 and the first adjustment component 351 and / or the second adjustment component 352 may correspond to a same magnetic gap 320 or different magnetic gaps 320). In this case, positions of the components of the speaker 30 are set more flexibly, which helps expand an applicable scope of the speaker 30.

[0083] In some embodiments, both the first adjustment component 351 and the second adjustment component 352 are magnetic members. For example, the first adjustment component 351 and the second adjustment component 352 may be made of magnet or soft iron. The first adjustment component 351 and the second adjustment component 352 are subject to a magnetic field of the magnetic gap 320.

[0084] For example, the first adjustment component 351 and / or the second adjustment component 352 may be made of soft iron. Soft iron is easily magnetized by a magnetic field and demagnetized after the external magnetic field is removed. Costs of the soft iron are relatively low, which helps reduce manufacturing costs of the speaker 30. The soft iron may be pure iron or an alloy with high iron content. For example, the first adjustment component 351 and / or the second adjustment component 352 may be made of steel with low carbon content, for example, "generally cold-rolled carbon steel sheet and steel strip" (SteelPlateColdCommon, SPCC). In some other embodiments, the first adjustment component 351 and / or the second adjustment component 352 may alternatively be made of an iron-silicon alloy, a nickel-iron alloy, or the like.

[0085] In some other embodiments, the first adjustment component 351 and / or the second adjustment component 352 may alternatively be made of magnetic materials such as an aluminum-nickel-cobalt alloy, an iron-chromium-cobalt alloy, ferrite, and neodymium-iron-boron.

[0086] Refer to FIG. 5 and FIG. 6. FIG. 6 is a schematic view of a cross-sectional structure of the speaker 30 shown in FIG. 3 in a B-B direction.

[0087] In some embodiments, the voice coil 34 has a hollow structure. The voice coil 34 may include a first side portion 341 and a second side portion 342 that are opposite and spaced apart. In this embodiment of this application, the first side portion 341 and the second side portion 342 of the voice coil 34 are located on a winding plane of the voice coil 34. For example, the winding plane of the voice coil 34 may be parallel to the thickness direction of the speaker 30. The first side portion 341 is fastened to the first diaphragm 331 and at least partially located in the magnetic gap 320. The second side portion 342 is fastened to the second diaphragm 332 and at least partially located in the magnetic gap 320. It may be understood that the first side portion 341 may be partially located in the magnetic gap 320, or the first side portion 341 may be completely located in the magnetic gap 320. The second side portion 342 is fastened to the second diaphragm 332 and at least partially located in the magnetic gap 320. It may be understood that the second side portion 342 may be partially located in the magnetic gap 320, or the second side portion 342 may be completely located in the magnetic gap 320.

[0088] In this embodiment, the first adjustment component 351 is located between the first diaphragm 331 and the voice coil 34 and fastened to the first diaphragm 331 and the voice coil 34. For example, the first adjustment component 351 may be located between the first side portion 341 of the voice coil 34 and the first diaphragm 331 and fastened to the first side portion 341 of the voice coil 34 and the first diaphragm 331. The second adjustment component 352 is located between the second diaphragm 332 and the voice coil 34 and fastened to the second diaphragm 332 and the voice coil 34. For example, the second adjustment component 352 may be located between the second side portion 342 of the voice coil 34 and the second diaphragm 332 and fastened to the second side portion 342 of the voice coil 34 and the second diaphragm 332. The voice coil 34, the first diaphragm 331, the second diaphragm 332, the first adjustment component 351, and the second adjustment component 352 may jointly form a vibration assembly that vibrates in a same direction.

[0089] In this embodiment of this application, a position design of the first adjustment component 351 enables the first adjustment component 351 to better align with the magnetic gap 320 of the magnetic circuit assembly 32. An alignment area between the first adjustment component 351 and the magnetic gap 320 is relatively large. When a position of the first adjustment component 351 changes, a magnitude of a force between the first adjustment component 351 and the magnetic gap 320 is more sensitive to the change, which helps increase benefits of a negative stiffness system of the speaker 30. A position design of the second adjustment component 352 enables the second adjustment component 352 to better align with the magnetic gap 320 of the magnetic circuit assembly 32. An alignment area between the second adjustment component 352 and the magnetic gap 320 is relatively large. When a position of the second adjustment component 352 changes, a magnitude of a force between the second adjustment component 352 and the magnetic gap 320 is more sensitive to the change, which helps increase benefits of a negative stiffness system of the speaker 30.

[0090] In another embodiment, the first adjustment component 351 is fastened to the first diaphragm 331 and located on one side that is of the first diaphragm 331 and that faces away from the voice coil 34, or the first adjustment component 351 is fastened to the voice coil 34 and located on a side portion of the voice coil 34. The second adjustment component 352 is fastened to the second diaphragm 332 and located on one side that is of the second diaphragm 332 and that faces away from the voice coil 34, or the second adjustment component 352 is fastened to the voice coil 34 and located on a side portion of the voice coil 34.

[0091] In this embodiment, the first diaphragm 331 and the second diaphragm 332 are symmetrically disposed with respect to the magnetic circuit assembly 32. It may be understood that the first diaphragm 331 and the second diaphragm 332 are symmetrically disposed with respect to a center of the magnetic circuit assembly 32. In this case, the thickness direction of the speaker 30 is a direction perpendicular to the first diaphragm 331 and the second diaphragm 332. In this way, structural symmetry of the vibration assembly relative to the magnetic circuit assembly 32 is ensured, and symmetric upward and downward vibration stiffness of the vibration assembly is achieved, thereby helping improve vibration stability of the vibration assembly. The first adjustment component 351 and the second adjustment component 352 are symmetrically disposed with respect to the magnetic circuit assembly 32. It may be understood that the first adjustment component 351 and the second adjustment component 352 are symmetrically disposed with respect to the center of the magnetic circuit assembly 32. In this way, structural symmetry of the vibration assembly relative to the magnetic circuit assembly 32 is ensured, and symmetric upward and downward vibration stiffness of the vibration assembly is achieved, thereby helping improve vibration stability of the vibration assembly.

[0092] Refer to FIG. 4 and FIG. 5. In some embodiments, the magnetic circuit assembly 32 may include a first magnetic component 321 and a second magnetic component 322. The first magnetic component 321 and the second magnetic component 322 are spaced apart along the thickness direction of the speaker 30. For example, the first magnetic component 321 and the second magnetic component 322 may be disposed opposite to each other. The first magnetic component 321 may include a first magnetic member 3211 and a second magnetic member 3212 that are spaced apart. An arrangement direction of the first magnetic member 3211 and the second magnetic member 3212 is perpendicular to the thickness direction of the speaker 30. For example, the first magnetic member 3211 and the second magnetic member 3212 may be disposed opposite to each other along the width direction of the speaker 30. Polarities of opposing ends of the first magnetic member 3211 and the second magnetic member 3212 are opposite, and a magnetic field loop is formed between the first magnetic member 3211 and the second magnetic member 3212. In other words, a first sub-magnetic gap 3201 is formed between the first magnetic member 3211 and the second magnetic member 3212. In another embodiment, the first magnetic member 3211 and the second magnetic member 3212 may alternatively be disposed opposite to each other along the length direction of the speaker 30.

[0093] For example, the second magnetic component 322 may include a third magnetic member 3221 and a fourth magnetic member 3222 that are spaced apart. An arrangement direction of the third magnetic member 3221 and the fourth magnetic member 3222 is perpendicular to the thickness direction of the speaker 30. For example, the third magnetic member 3221 and the fourth magnetic member 3222 may be disposed opposite to each other along the width direction of the speaker 30. Polarities of opposing ends of the third magnetic member 3221 and the fourth magnetic member 3222 are opposite, and a magnetic field loop is formed between the third magnetic member 3221 and the fourth magnetic member 3222. In other words, a second sub-magnetic gap 3202 is formed between the third magnetic member 3221 and the fourth magnetic member 3222. In another embodiment, the third magnetic member 3221 and the fourth magnetic member 3222 may be disposed opposite to each other along the length direction of the speaker 30. In this embodiment, a structure of the magnetic circuit assembly 32 is relatively simple, and manufacturing costs of the speaker 30 are relatively low.

[0094] In this embodiment, the first sub-magnetic gap 3201 and the second sub-magnetic gap 3202 jointly form the magnetic gap 320 of the magnetic circuit assembly 32. The first sub-magnetic gap 3201 and the second sub-magnetic gap 3202 are arranged in the thickness direction of the speaker 30. The first side portion 341 of the voice coil 34 is at least partially located in the first sub-magnetic gap 3201. It may be understood that the first side portion 341 may be completely located in the first sub-magnetic gap 3201, or may be partially located in the first sub-magnetic gap 3201. In this case, the first adjustment component 351 is located on one side that is of the first sub-magnetic gap 3201 and that is close to the first diaphragm 331. The second side portion 342 of the voice coil 34 is at least partially located in the first sub-magnetic gap 3201. It may be understood that the second side portion 342 may be completely located in the second sub-magnetic gap 3202, or may be partially located in the second sub-magnetic gap 3202. In this case, the second adjustment component 352 is located on one side that is of the second sub-magnetic gap 3202 and that is close to the second diaphragm 332.

[0095] Refer to FIG. 7. FIG. 7 is a cross-sectional view of a partial structure of the speaker 30 shown in FIG. 3 in a state in the A-A direction. For example, the voice coil 34 of the speaker 30 shown in FIG. 7 is not energized, and the vibration assembly is in a balanced position.

[0096] In this embodiment, the first adjustment component 351 is subject to a magnetic field of the first sub-magnetic gap 3201. In this case, the first sub-magnetic gap 3201 generates a static magnetic force F S1 on the first adjustment component 351. A direction of the static magnetic force F S1 points from the first diaphragm 331 to the second diaphragm 332. When the first adjustment component 351 is close to the magnetic circuit assembly 32, a magnitude of the static magnetic force F S1 increases. When the first adjustment component 351 is away from the magnetic circuit assembly 32, the magnitude of the static magnetic force F S1 decreases. The second adjustment component 352 is subject to a magnetic field of the second sub-magnetic gap 3202. In this case, the second sub-magnetic gap 3202 generates a static magnetic force F S2 on the second adjustment component 352. A direction of the static magnetic force F S2 points from the second diaphragm 332 to the first diaphragm 331. When the second adjustment component 352 is close to the magnetic circuit assembly 32, a magnitude of the static magnetic force F S2 increases. When the second adjustment component 352 is away from the magnetic circuit assembly 32, the magnitude of the static magnetic force F S2 decreases.

[0097] In this embodiment, the direction of the static magnetic force F S1 applied to the first adjustment component 351 is opposite to the direction of the static magnetic force F S2 applied to the second adjustment component 352, and when the voice coil 34 is not energized, the magnitude of the static magnetic force F S1 applied to the first adjustment component 351 is equal to the magnitude of the static magnetic force F S2 applied to the second adjustment component 352. In this case, F S1 and F S2 may counteract each other, and the vibration assembly is in a balanced position, that is, the voice coil 34, the first diaphragm 331, the second diaphragm 332, the first adjustment component 351, and the second adjustment component 352 are in respective balanced positions.

[0098] Refer to FIG. 7 and FIG. 8. FIG. 8 is a cross-sectional view of a partial structure of the speaker 30 shown in FIG. 3 in another state in the A-A direction. For example, the voice coil 34 of the speaker 30 shown in FIG. 8 is energized, and the voice coil 34 moves from the first diaphragm 331 to the second diaphragm 332.

[0099] In this embodiment, a magnetic field direction of the first sub-magnetic gap 3201 is opposite to a magnetic field direction of the second sub-magnetic gap 3202. It may be understood that, when an N pole (a north pole) of one magnetic member is opposite to an S pole (a south pole) of another magnetic member, a magnetic field direction of a magnetic gap 320 formed by the two magnetic members points from the N pole of the one magnetic member to the S pole of the other opposite magnetic member.

[0100] For example, an N pole of the first magnetic member 3211 is opposite to an S pole of the second magnetic member 3212, and a magnetic direction of the first sub-magnetic gap 3201 formed between the first magnetic member 3211 and the second magnetic member 3212 points from the N pole of the first magnetic member 3211 to the S pole of the second magnetic member 3212. An S pole of the third magnetic member 3221 is opposite to an N pole of the fourth magnetic member 3222, and a magnetic direction of the second sub-magnetic gap 3202 formed between the third magnetic member 3221 and the fourth magnetic member 3222 points from the N pole of the fourth magnetic member 3222 to the S pole of the third magnetic member 3221.

[0101] Certainly, in another embodiment, an S pole of the first magnetic member 3211 may be opposite to an N pole of the second magnetic member 3212, and a magnetic direction of the second sub-magnetic gap 3202 formed between the third magnetic member 3221 and the fourth magnetic member 3222 points from the N pole of the second magnetic member 3212 to the S pole of the first magnetic member 3211. An N pole of the third magnetic member 3221 may be opposite to an S pole of the fourth magnetic member 3222, and a magnetic direction of the first sub-magnetic gap 3201 formed between the first magnetic member 3211 and the second magnetic member 3212 points from the N pole of the third magnetic member 3221 to the S pole of the fourth magnetic member 3222.

[0102] In this embodiment, after the voice coil 34 is energized, a direction of a current in the voice coil 34 may be parallel or approximately parallel to the winding plane of the voice coil 34, the current circulates through the first side portion 341 and the second side portion 342, and directions of the current in the first side portion 341 and the second side portion 342 are opposite, but the magnetic field direction of the first sub-magnetic gap 3201 is opposite to the magnetic field direction of the second sub-magnetic gap 3202. Therefore, the first side portion 341 and the second side portion 342 of the voice coil 34 are subject to Ampere forces F B in a same direction in the magnetic field. The voice coil 34 can move along the Z-axis direction (the direction of the Ampere forces F B ) by cutting magnetic induction lines. In addition, motion consistency of the voice coil 34 is relatively strong, and driving efficiency is relatively high. The first diaphragm 331, the second diaphragm 332, the first adjustment component 351, and the second adjustment component 352 are driven to move back and forth together along the Z-axis direction. The entire vibration assembly vibrates in a same direction, and both the first diaphragm 331 and the second diaphragm 332 emit sound. It may be understood that the direction of the Ampere force F B follows the left-hand rule, that is, the direction of the Ampere forces F B may point from the first diaphragm 331 to the second diaphragm 332, or from the second diaphragm 332 to the first diaphragm 331.

[0103] In this embodiment, when the speaker 30 works, after being energized, the voice coil 34 is subject to the Ampere forces F B and deviates from the balanced position of the voice coil 34. In this case, the vibration assembly generates an elastic restoring force because the vibration assembly deviates from the balanced position. The restoring force may be provided by an elastic component such as the first diaphragm 331 or the second diaphragm 332. The restoring force provided by the elastic component is generally opposite to a movement direction of the vibration assembly. For example, when the voice coil 34 vibrates and drives the first diaphragm 331 and the second diaphragm 332 to vibrate, the first diaphragm 331 and the second diaphragm 332 may provide a restoring force F M , and a direction of the restoring force F M is opposite to the direction of the Ampere forces F B . Under a linear small-displacement assumption, the restoring force F M is directly proportional to a displacement x of the first diaphragm 331 and the second diaphragm 332. In other words, F M is equal to K ms *x, where K ms is stiffness of the vibration assembly. In addition, a similar rule is still followed in a case of a large displacement, and K ms may be represented as K ms (x), that is, K ms varies with the displacement x.

[0104] The first diaphragm 331, the second diaphragm 332, the voice coil 34, the first adjustment component 351, the second adjustment component 352, and the like of the vibration assembly jointly form a vibrating mass M ms . Therefore, a first resonance frequency f 0 of a vibration system is represented as: f 0 = 1 2 π K ms M ms

[0105] In a low frequency band before the frequency f 0 , the vibration assembly of the speaker 30 generally performs piston-like vibration. A low-frequency radiation capability of the vibration assembly is directly proportional to (F B / K ms ), where F B is the Ampere forces, and K ms is stiffness of the vibration assembly. Therefore, increasing F B or reducing K ms can improve a low-frequency radiation capability of the speaker 30 and improve low-frequency sensitivity of the speaker 30.

[0106] Refer to FIG. 7 and FIG. 8. In this embodiment, when the voice coil 34 moves from the first diaphragm 331 to the second diaphragm 332 after being energized, the first diaphragm 331 and the second diaphragm 332 are driven by the voice coil 34 to move from the first diaphragm 331 to the second diaphragm 332, and a direction of a restoring force F M applied to the vibration assembly points from the second diaphragm 332 to the first diaphragm 331. The first adjustment component 351 and the second adjustment component 352 are driven by the voice coil 34 to move in a direction away from the first diaphragm 331. In this case, the first adjustment component 351 is close to the magnetic circuit assembly 32, and a static magnetic force F S1 applied to the first adjustment component 351 increases. The second adjustment component 352 is far away from the magnetic circuit assembly 32, and a static magnetic force F S2 applied to the second adjustment component 352 decreases. The static magnetic force F S1 applied to the first adjustment component 351 is greater than the static magnetic force F S2 applied to the second adjustment component 352. A direction of a static magnetic force Fs applied to the first adjustment component 351 and the second adjustment component 352 as a whole points from the first diaphragm 331 to the second diaphragm 332, and is opposite to a direction of a restoring force F M applied to the vibration assembly, and increases as a displacement S1 of the first adjustment component 351 and the second adjustment component 352 increases, so that a part of the restoring force F M applied to the vibration assembly can be counteracted. The first adjustment component 351 and the second adjustment component 352 may provide a negative stiffness coefficient (-K s ) for the speaker 30, where stiffness of the vibration assembly is (K ms -K s ), and the stiffness of the vibration assembly decreases. In this way, the low-frequency radiation capability of the speaker 30 can be enhanced, and low-frequency sensitivity of the speaker 30 can be improved. In other words, low-frequency performance of the speaker 30 is improved.

[0107] Refer to FIG. 7 and FIG. 9. FIG. 9 is a cross-sectional view of a partial structure of the speaker 30 shown in FIG. 3 in another state in the A-A direction. For example, the voice coil 34 of the speaker 30 shown in FIG. 9 is energized, and the voice coil 34 moves from the second diaphragm 332 to the first diaphragm 331.

[0108] In this embodiment, when the voice coil 34 moves from the second diaphragm 332 to the first diaphragm 331 after being energized, the first diaphragm 331 and the second diaphragm 332 are driven by the voice coil 34 to move from the second diaphragm 332 to the first diaphragm 331, and a direction of a restoring force F M applied to the vibration assembly points from the first diaphragm 331 to the second diaphragm 332. The first adjustment component 351 and the second adjustment component 352 are driven by the voice coil 34 to move in a direction close to the first diaphragm 331. In this case, the first adjustment component 351 is close to the magnetic circuit assembly 32, and a static magnetic force F S1 applied to the first adjustment component 351 decreases. The second adjustment component 352 is far away from the magnetic circuit assembly 32, and a static magnetic force F S2 applied to the second adjustment component 352 increases. The static magnetic force F S1 applied to the first adjustment component 351 is less than the static magnetic force F S2 applied to the second adjustment component 352. A direction of a static magnetic force Fs applied to the first adjustment component 351 and the second adjustment component 352 as a whole points from the second diaphragm 332 to the first diaphragm 331, and is opposite to a direction of a restoring force F M applied to the vibration assembly, and increases as a displacement S2 of the first adjustment component 351 and the second adjustment component 352 increases, so that a part of the restoring force F M applied to the vibration assembly can be counteracted. The first adjustment component 351 and the second adjustment component 352 may provide a negative stiffness coefficient (-K s ), where stiffness of the vibration assembly is (K ms -K s ), and the stiffness of the vibration assembly decreases. In this way, the low-frequency radiation capability of the speaker 30 can be enhanced, and low-frequency sensitivity of the speaker 30 can be improved. In other words, low-frequency performance of the speaker 30 is improved.

[0109] Refer to FIG. 4, FIG. 5, and FIG. 6. In some embodiments, the speaker 30 may further include a first connector 361 and a second connector 362. The first connector 361 may include a peripheral portion 3611 and a connection portion 3612, and the connection portion 3612 is located on an inner side of the peripheral portion 3611 and connected to the peripheral portion 3611. It may be understood that the peripheral portion 3611 may surround the connection portion 3612. For example, the peripheral portion 3611 may be approximately rectangular, and a shape of the peripheral portion 3611 corresponds to a peripheral shape of the first diaphragm 331. The connection portion 3612 may be approximately in a strip shape, and the shape of the connection portion 3612 corresponds to a shape of a surface that is of the voice coil 34 and that faces toward the first diaphragm 331. It may be understood that the connection portion 3612 may be specifically designed based on a manner of disposing the voice coil 34, that is, the shape of the surface that is of the voice coil 34 and that faces toward the first diaphragm 331.

[0110] In this embodiment, the peripheral portion 3611 of the first connector 361 is located between the housing 31 and the first diaphragm 331 and fastened to the housing 31 and the first diaphragm 331. The connection portion 3612 of the first connector 361 is located between the first diaphragm 331 and the first adjustment component 351 and fastened to the first diaphragm 331 and the first adjustment component 351. In other words, the connection portion 3612 of the first connector 361 is located between the first diaphragm 331 and the voice coil 34 and fastened to the first diaphragm 331 and the voice coil 34. In this embodiment, the connection portion 3612 of the first connector 361 is indirectly connected to the voice coil 34. In another embodiment, the first adjustment component 351 may not be disposed between the first diaphragm 331 and the voice coil 34, and the connection portion 3612 of the first connector 361 may be directly connected to the voice coil 34.

[0111] For example, the second connector 362 and the first connector 361 have a same shape. The second connector 362 may include a peripheral portion 3621 and a connection portion 3622, and the connection portion 3622 is located on an inner side of the peripheral portion 3621 and connected to the peripheral portion 3621. It may be understood that the peripheral portion 3621 may surround the connection portion 3622. For example, the peripheral portion 3621 may be approximately rectangular, and a shape of the peripheral portion 3621 corresponds to a peripheral shape of the second diaphragm 332. The connection portion 3622 may be approximately in a strip shape, and the shape of the connection portion 3622 corresponds to a shape of a surface that is of the voice coil 34 and that faces toward the second diaphragm 332. It may be understood that the connection portion 3622 may be specifically designed based on a manner of disposing the voice coil 34, that is, the shape of the surface that is of the voice coil 34 and that faces toward the second diaphragm 332.

[0112] In this embodiment, the peripheral portion 3621 of the second connector 362 is located between the housing 31 and the first diaphragm 331 and fastened to the housing 31 and the second diaphragm 332. The connection portion 3622 of the second connector 362 is located between the second diaphragm 332 and the second adjustment component 352 and fastened to the second diaphragm 332 and the second adjustment component 352. In other words, the connection portion 3622 of the second connector 362 is located between the second diaphragm 332 and the voice coil 34 and fastened to the second diaphragm 332 and the voice coil 34. In this embodiment, the connection portion 3622 of the second connector 362 is indirectly connected to the voice coil 34. In another embodiment, the second adjustment component 352 may not be disposed between the second diaphragm 332 and the voice coil 34, and the connection portion 3622 of the second connector 362 may be directly connected to the voice coil 34.

[0113] The speaker 30 in this embodiment of this application includes the first connector 361 and the second connector 362, and the voice coil 34 may be respectively connected to the first diaphragm 331 and the second diaphragm 332 by using the first connector 361 and the second connector 362. In this way, vibration stability is better when the vibration assembly vibrates. In addition, the first connector 361 and the second connector 362 are respectively disposed on two sides of the voice coil 34, to ensure structural symmetry of the vibration assembly relative to the magnetic circuit assembly 32 and achieve symmetric upward and downward vibration stiffness of the vibration assembly, thereby helping improve vibration stability of the vibration assembly. In addition, the first connector 361 and the second connector 362 may have elasticity. When the vibration assembly vibrates, the first connector 361 and the second connector 362 may provide a restoring force for the vibration assembly, and a direction of the restoring force is opposite to a vibration direction. In other words, the first connector 361 and the second connector 362 may enhance stiffness of the vibration assembly.

[0114] In some embodiments, materials of the first connector 361 and the second connector 362 may be plastic, metal, or the like.

[0115] In some embodiments, the first connector 361 and / or the second connector 362 may further have a conductive property. The first connector 361 and / or the second connector 362 are / is electrically connected to the voice coil 34, so that the voice coil 34 may be electrically connected to a component outside the speaker 30 by using the first connector 361 and / or the second connector 362. In other words, an external current may reach the voice coil 34 through the first connector 361 and / or the second connector 362.

[0116] In another embodiment, only one connector may be disposed on the speaker 30, and the connector is connected between the voice coil 34 and the first diaphragm 331, or the connector is connected between the voice coil 34 and the second diaphragm 332. A specific quantity and shapes of connectors are not limited in this application. In another embodiment, shapes of the first connector 361 and the second connector 362 may alternatively be different.

[0117] Refer to FIG. 4 and FIG. 5 again. In some embodiments, the housing 31 is a cylinder that is approximately rectangular. The housing 31 has a hollow structure with openings on both sides. The two openings of the housing 31 are respectively a first opening 3111 and a second opening 3112. The first opening 3111 and the second opening 3112 may communicate with the inner cavity 311. Both the peripheral edge of the first diaphragm 331 and the peripheral edge of the second diaphragm 332 are fastened to the housing 31, the first diaphragm 331 covers the first opening 3111 of the housing 31, and the second diaphragm 332 covers the second opening 3112 of the housing 31. In other words, the first diaphragm 331 and the second diaphragm 332 respectively cover two opposite sides of the housing 31, to seal the inner cavity 311.

[0118] In another embodiment, the shape of the housing 31 may also be a cylinder, a square cylinder, an irregular shape, or the like.

[0119] In this embodiment, the speaker 30 may further include a mounting bracket 37. The mounting bracket 37 is disposed in the inner cavity 311. For example, the housing 31 may include a first slot 312 and a second slot 313, and the first slot 312 and the second slot 313 are respectively disposed on two opposite inner side walls in the housing 31 in the length direction. The mounting bracket 37 may be limited inside the housing 31 by using the first slot 312 and the second slot 313. The first slot 312 and the second slot 313 may limit movement of the mounting bracket 37 in the Y-axis direction and the Z-axis direction, thereby securing the mounting bracket 37 fastened to the housing 31. Certainly, in another embodiment, the housing 31 may alternatively not include the first slot 312 and the second slot 313, and the mounting bracket 37 may be fastened to the housing 31 in a connection manner such as bonding or bolt fastening. Alternatively, the housing 31 may further include a limiting structure other than the first slot 312 and the second slot 313 to limit the mounting bracket 37, and the magnetic circuit assembly 32 is fastened to the housing 31. A manner of connecting the mounting bracket 37 to the housing 31 is not limited in this application.

[0120] In this embodiment, the mounting bracket 37 is disposed in the inner cavity of the housing 31, and the mounting bracket 37 and the housing 31 constitute an inner-outer split structure. In another embodiment, the mounting bracket 37 and the housing 31 may alternatively be integrally formed structural components, and the mounting bracket 37 is located on the inner side of the housing 31. Alternatively, the mounting bracket 37 is located on the inner side of the housing 31, and the housing 31 and the mounting bracket 37 constitute an upper-lower split structure. In other words, the housing 31 and the mounting bracket 37 both constitute the upper-lower split structure, and upper and lower parts of the housing 31 and the mounting bracket 37 may be connected to each other.

[0121] Refer to FIG. 4 and FIG. 5. The magnetic circuit assembly 32 may be fixed on the mounting bracket 37. For example, the mounting bracket 37 is a column that is approximately rectangular. The mounting bracket 37 has a hollow structure, and has mounting space 371 inside. For example, the mounting bracket 37 may include a top wall 373 and a bottom wall 374 that are disposed opposite to each other, and a first side wall 375 and a second side wall 376 that are disposed opposite to each other. The first side wall 375 and the second side wall 376 are connected between the top wall 373 and the bottom wall 374. The top wall 373, the bottom wall 374, the first side wall 375, and the second side wall 376 jointly enclose the mounting space 371. The magnetic circuit assembly 32 may be fixed in the mounting space 371. The mounting bracket 37 may further have a limiting notch 372. The limiting notch 372 may penetrate the top wall 373 and the bottom wall 374 of the mounting bracket 37 in the Z-axis direction, and communicate with the mounting space 371. The magnetic circuit assembly 32 may be at least partially located in the limiting notch 372. The limiting notch 372 may limit movement of the magnetic circuit assembly 32 in the Y-axis direction, thereby securing the magnetic circuit assembly 32 to the mounting bracket 37. For example, there may be four limiting notches 372, and the four limiting notches 372 are spaced apart. The first magnetic member 3211, the second magnetic member 3212, the third magnetic member 3221, and the fourth magnetic member 3222 of the magnetic circuit assembly 32 are respectively fastened to the four limiting notches 372.

[0122] In another embodiment, the speaker 30 may alternatively not include the mounting bracket 37. In this case, the magnetic circuit assembly 32 may be directly fastened to the inner cavity 311 of the housing 31.

[0123] Refer to FIG. 5 and FIG. 6. In some embodiments, edges of the first diaphragm 331 and the second diaphragm 332 may further include a folding ring portion. The folding ring portion is designed as a semicircular arc and used to increase a displacement in a vibration direction. In actual use, other effective means for increasing the displacement may be used. For example, the folding ring portion is designed in an elliptical shape, or the first diaphragm 331 or the second diaphragm 332 is made of a material with a relatively low elastic modulus. Certainly, in another embodiment, the first diaphragm 331 or the second diaphragm 332 may alternatively not include the folding ring part. Shapes of the first diaphragm 331 and the second diaphragm 332 are not limited in this application. For example, the first diaphragm 331 and / or the second diaphragm 332 may further include a dome 338, and the dome 338 is separately fastened to a surface of one side that is of the first diaphragm 331 and / or the second diaphragm 332 and that is away from the voice coil 34, to increase stiffness of the first diaphragm 331 and the second diaphragm 332.

[0124] In some embodiments, the vibration assembly may further include a connection line (not shown in the figure). The connection line may be disposed on a surface of one side that is of the first diaphragm 331 or the second diaphragm 332 and that is close to the voice coil 34. The connection line is electrically connected to the voice coil 34. The connection line may alternatively be a conducting wire. In some embodiments, a copper wire is printed on the surface of the first diaphragm 331 to serve as a line lead-out solution. Certainly, in another embodiment, a line may be etched on the first diaphragm 331 to serve as a line lead-out solution, or the connection line is disposed on the second diaphragm 332. This application imposes no limitation on the line lead-out solution.

[0125] Refer to FIG. 10A. FIG. 10A is a schematic view of a cross-sectional structure of the speaker 30 shown in FIG. 3 in another embodiment in the A-A direction.

[0126] A structure of the speaker 30 provided in this embodiment is approximately the same as the structure of the speaker 30 in the embodiment shown in FIG. 3, and a same part is not described again. A difference is as follows: The speaker 30 provided in this embodiment includes a plurality of voice coils 34, and an arrangement direction of the plurality of voice coils 34 is parallel to the width direction of the speaker 30. It may be understood that an appropriate length-to-width ratio may be designed for the speaker 30 based on an actual requirement, and a layout of the plurality of voice coils 34 may be designed with reference to the length-to-width ratio of the speaker 30, to improve stability of the vibration assembly in a vibration process.

[0127] In this embodiment, there are also a plurality of magnetic gaps 320, and the plurality of magnetic gaps 320 are spaced apart in the width direction of the speaker 30. The plurality of voice coils 34 are disposed to correspond to different magnetic gaps 320. It may be understood that each voice coil 34 may be partially located in a corresponding magnetic gap 320, or each voice coil 34 may be completely located in a corresponding magnetic gap 320. After the plurality of voice coils 34 are energized, the plurality of voice coils 34 may vibrate synchronously, and drive the first diaphragm 331, the second diaphragm 332, the first adjustment component 351, and the second adjustment component 352 to vibrate in a same direction. For example, there are a plurality of first adjustment components 351 and a plurality of second adjustment components 352. The plurality of first adjustment components 351 are at least partially aligned with the plurality of magnetic gaps 320 and correspond to the plurality of magnetic gaps 320 on a one-to-one basis. The plurality of second adjustment components 352 are at least partially aligned with the plurality of magnetic gaps 320 and correspond to the plurality of magnetic gaps 320 on a one-to-one basis.

[0128] For example, there are two voice coils 34 and two magnetic gaps 320. The first magnetic component 321 may include a first magnetic member 3211, a second magnetic member 3212, and a fifth magnetic member 3213 that are spaced apart. The first magnetic member 3211, the second magnetic member 3212, and the fifth magnetic member 3213 are sequentially disposed along the width direction of the speaker 30. In other words, the second magnetic member 3212 is located between the first magnetic member 3211 and the fifth magnetic member 3213 and disposed opposite to the first magnetic member 3211 and the fifth magnetic member 3213. Polarities of opposing ends of the first magnetic member 3211 and the second magnetic member 3212 are opposite, and a first sub-magnetic gap 3201 of a magnetic gap 320 is formed between the first magnetic member 3211 and the second magnetic member 3212. Polarities of opposing ends of the second magnetic member 3212 and the fifth magnetic member 3213 are opposite, and a first sub-magnetic gap 3201 of another magnetic gap 320 is formed between the second magnetic member 3212 and the fifth magnetic member 3213.

[0129] For example, the second magnetic component 322 may include a third magnetic member 3221, a fourth magnetic member 3222, and a sixth magnetic member 3223 that are spaced apart. The third magnetic member 3221, the fourth magnetic member 3222, and the sixth magnetic member 3223 are sequentially disposed along the width direction of the speaker 30. In other words, the fourth magnetic member 3222 is located between the third magnetic member 3221 and the sixth magnetic member 3223 and disposed opposite to the third magnetic member 3221 and the sixth magnetic member 3223. Polarities of opposing ends of the third magnetic member 3221 and the fourth magnetic member 3222 are opposite, and a second sub-magnetic gap 3202 of a magnetic gap 320 is formed between the third magnetic member 3221 and the fourth magnetic member 3222. Polarities of opposing ends of the fourth magnetic member 3222 and the sixth magnetic member 3223 are opposite, and a second sub-magnetic gap 3202 of another magnetic gap 320 is formed between the fourth magnetic member 3222 and the sixth magnetic member 3223. The first side portions 341 of the two voice coils 34 are at least partially respectively located in a first sub-magnetic gap 3201 of a corresponding magnetic gap 320, and the second side portions 342 of the two voice coils 34 are at least partially respectively located in a second sub-magnetic gap 3202 of a corresponding magnetic gap 320. In another embodiment, there may be more than two voice coils 34 and more than two magnetic gaps 320. It should be noted that shapes of the plurality of voice coils 34 may be completely the same or may be different. A specific quantity and shapes of voice coils 34 are not limited in this application.

[0130] Refer to FIG. 10B. FIG. 10B is a schematic view of a cross-sectional structure of the speaker 30 shown in FIG. 3 in another embodiment in the B-B direction.

[0131] A structure of the speaker 30 provided in this embodiment is approximately the same as the structure of the speaker 30 in the embodiment shown in FIG. 3, and a same part is not described again. A difference is as follows: The speaker 30 provided in this embodiment includes a plurality of voice coils 34, and an arrangement direction of the plurality of voice coils 34 is parallel to the length direction of the speaker 30. The plurality of voice coils 34 may be arranged by fully using space in the length direction of the speaker 30. This can reduce space occupied in the width direction of the speaker 30 and facilitating miniaturization of the speaker 30 in width, thereby obtaining a slender product form and making the speaker 30 better suited for an elongated product, for example, an electronic device 1000 such as an electronic reading pen or a selfie stick. It may be understood that, in some other embodiments, an appropriate length-to-width ratio may be designed for the speaker 30 based on an actual requirement, and a layout of a plurality of voice coils 34 may be designed with reference to the length-to-width ratio of the speaker 30, to improve stability of the vibration assembly in a vibration process.

[0132] In this embodiment, the plurality of voice coils 34 are at least partially located in a same magnetic gap 320. It may be understood that each voice coil 34 may be partially located in a magnetic gap 320, or each voice coil 34 may be completely located in a magnetic gap 320. After the plurality of voice coils 34 are energized, the plurality of voice coils 34 may vibrate synchronously, and drive the first diaphragm 331, the second diaphragm 332, the first adjustment component 351, and the second adjustment component 352 to vibrate in a same direction. For example, there are two voice coils 34. The two voice coils 34 are located in a same magnetic gap 320. In another embodiment, there may be more than two voice coils 34. It should be noted that shapes of the plurality of voice coils 34 may be completely the same or may be different. A specific quantity and shapes of voice coils 34 are not limited in this application.

[0133] In this embodiment, there are a plurality of first adjustment components 351 and a plurality of second adjustment components 352. The plurality of first adjustment components 351 are spaced apart and at least partially aligned with a same magnetic gap 320. The plurality of second adjustment components 352 are spaced apart and at least partially aligned with a same magnetic gap 320. In another embodiment, the plurality of first adjustment components 351 may be an integrated structural component. The plurality of second adjustment components 352 may be an integrated structural component.

[0134] Refer to FIG. 11. FIG. 11 is a schematic view of a cross-sectional structure of the speaker 30 shown in FIG. 3 in another embodiment in the A-A direction.

[0135] A structure of the speaker 30 provided in this embodiment is approximately the same as the structure of the speaker 30 in the embodiment shown in FIG. 3, and a same part is not described again. A difference is as follows: The voice coil 34 of the speaker 30 provided in this embodiment includes a first sub-voice coil 34a and a second sub-voice coil 34b. The first sub-voice coil 34a and the second sub-voice coil 34b are arranged along the thickness direction of the speaker 30. It may be understood that a plurality of sub-voice coils 34 may be arranged by fully using space in the thickness direction of the speaker 30. This can reduce space occupied in the thickness direction of the speaker 30 and facilitate miniaturization of the speaker 30 in thickness, thereby making the speaker 30 better suited for a thin flat product, for example, an electronic device 1000 such as a mobile phone, a smartwatch, or a tablet computer.

[0136] In this embodiment, the magnetic gap 320 includes a first sub-magnetic gap 3201a, a second sub-magnetic gap 3202a, a third sub-magnetic gap 3203b, and a fourth sub-magnetic gap 3204b that are spaced apart. An arrangement direction of the first sub-magnetic gap 3201a and the second sub-magnetic gap 3202a is perpendicular to the thickness direction of the speaker 30. A magnetic field direction of the first sub-magnetic gap 3201a is opposite to a magnetic field direction of the second sub-magnetic gap 3202a. An arrangement direction of the third sub-magnetic gap 3203b and the fourth sub-magnetic gap 3204b is perpendicular to the thickness direction of the speaker 30, and a magnetic field direction of the third sub-magnetic gap 3203b is opposite to a magnetic field direction of the fourth sub-magnetic gap 3204b. An arrangement direction of the first sub-magnetic gap 3201a and the third sub-magnetic gap 3203b is parallel to the thickness direction of the speaker 30, and an arrangement direction of the second sub-magnetic gap 3202a and the fourth sub-magnetic gap 3204b is parallel to the thickness direction of the speaker 30.

[0137] For example, the magnetic circuit assembly 32 includes a first magnetic component 323 and a second magnetic component 324, and the first magnetic component 323 and the second magnetic component 324 are arranged along the thickness direction of the speaker 30. The first magnetic component 323 includes a first magnetic member 3231 and a second magnetic member 3232 that are spaced apart, and a third magnetic member 3233 and a fourth magnetic member 3234 that are spaced apart. An arrangement direction of the first magnetic member 3231, the second magnetic member 3232, the third magnetic member 3233, and the fourth magnetic member 3234 is perpendicular to the thickness direction of the speaker 30. For example, the first magnetic member 3231 and the second magnetic member 3232 may be disposed opposite to each other along the width direction of the speaker 30, and the third magnetic member 3233 and the fourth magnetic member 3234 are disposed opposite to each other along the width direction of the speaker 30. The second magnetic member 3232 and the third magnetic member 3233 may be disposed in contact with each other, or may be spaced apart. Polarities of opposing ends of the first magnetic member 3231 and the second magnetic member 3232 are opposite, and the first sub-magnetic gap 3201a is formed between the first magnetic member 3231 and the second magnetic member 3232. Polarities of opposing ends of the third magnetic member 3233 and the fourth magnetic member 3234 are opposite, and the second sub-magnetic gap 3202a is formed between the third magnetic member 3233 and the fourth magnetic member 3234.

[0138] For example, the second magnetic component 324 includes a fifth magnetic member 3241 and a sixth magnetic member 3242 that are spaced apart, and a seventh magnetic member 3243 and an eighth magnetic member 3244 that are spaced apart. An arrangement direction of the fifth magnetic member 3241, the sixth magnetic member 3242, the seventh magnetic member 3243, and the eighth magnetic member 3244 is perpendicular to the thickness direction of the speaker 30. For example, the fifth magnetic member 3241 and the sixth magnetic member 3242 may be disposed opposite to each other along the width direction of the speaker 30, and the seventh magnetic member 3243 and the eighth magnetic member 3244 are disposed opposite to each other along the width direction of the speaker 30. The sixth magnetic member 3242 and the seventh magnetic member 3243 may be disposed in contact with each other, or may be spaced apart. Polarities of opposing ends of the fifth magnetic member 3241 and the sixth magnetic member 3242 are opposite, and the third sub-magnetic gap 3203b is formed between the fifth magnetic member 3241 and the sixth magnetic member 3242. Polarities of opposing ends of the seventh magnetic member 3243 and the eighth magnetic member 3244 are opposite, and the fourth sub-magnetic gap 3204b is formed between the seventh magnetic member 3243 and the eighth magnetic member 3244. In this embodiment, a structure of the magnetic circuit assembly 32 is relatively simple, and manufacturing costs of the speaker 30 are relatively low.

[0139] In this embodiment, the first sub-voice coil 34a includes a first side portion 341a and a second side portion 342a that are opposite to each other. A first side portion 341 and a second side portion 342 of the second sub-voice coil 34b are located on a winding plane of the second sub-voice coil 34b. For example, the winding plane of the second sub-voice coil 34b may be perpendicular to the thickness direction of the speaker 30. The first side portion 341a is at least partially located in the first sub-magnetic gap 3201a, and the second side portion 342a is at least partially located in the second sub-magnetic gap 3202a. In this embodiment of this application, the first side portion 341 and the second side portion 342 of the first sub-voice coil 34a are located on a winding plane of the first sub-voice coil 34a. For example, the winding plane of the first sub-voice coil 34a may be perpendicular to the thickness direction of the speaker 30. The second sub-voice coil 34b includes a third side portion 341b and a fourth side portion 342b that are opposite to each other, the third side portion 341b is at least partially located in the third sub-magnetic gap 3203b, and the fourth side portion 342b is at least partially located in the fourth sub-magnetic gap 3204b.

[0140] In this embodiment, the speaker 30 may further include a bracket 343. The bracket 343 may be located between the first sub-voice coil 34a and the second sub-voice coil 34b and fastened to the first sub-voice coil 34a and the second sub-voice coil 34b. For the speaker 30 in this embodiment, the bracket 343 is disposed to connect the first sub-voice coil 34a and the second sub-voice coil 34b, so that the first sub-voice coil 34a and the second sub-voice coil 34b may form a whole. After the first sub-voice coil 34a and the second sub-voice coil 34b are energized, the first sub-voice coil 34a and the second sub-voice coil 34b may vibrate synchronously as a whole, thereby helping improve vibration consistency and vibration stability of the vibration assembly.

[0141] In this embodiment, the first adjustment component 351 may include a first sub-adjustment component 351a and a second sub-adjustment component 351b. Both the first sub-adjustment component 351a and the second sub-adjustment component 351b are fastened to the first diaphragm 331 and the first sub-voice coil 34a. The first sub-adjustment component 351a is at least partially aligned with the first sub-magnetic gap 3201a. The second sub-adjustment component 351b is at least partially aligned with the second sub-magnetic gap 3202a. The second adjustment component 352 may include a third sub-adjustment component 352a and a fourth sub-adjustment component 352b. Both the third sub-adjustment component 352a and the fourth sub-adjustment component 352b are fastened to the second diaphragm 332 and the second sub-voice coil 34b. The third sub-adjustment component 352a is at least partially aligned with the third sub-magnetic gap 3203b. The fourth sub-adjustment component 352b is at least partially aligned with the fourth sub-magnetic gap 3204b. In another embodiment, the voice coil 34 may further include a third sub-voice coil, a fourth sub-voice coil, and so on. It should be noted that shapes of the plurality of sub-voice coils may be completely the same or may be different. A specific quantity and shapes of sub-voice coils 34 are not limited in this application.

[0142] Refer to FIG. 12 and FIG. 13. FIG. 12 is a diagram of a structure of the speaker 30 shown in FIG. 3 in another embodiment. FIG. 13 is a schematic exploded view of a partial structure of the speaker 30 shown in FIG. 12. For ease of description, a width direction of the speaker 30 in FIG. 12 is defined as an X-axis direction, a length direction of the speaker 30 is defined as a Y-axis direction, and a thickness direction of the speaker 30 is defined as a Z-axis direction. The X-axis direction, the Y-axis direction, and the Z-axis direction are perpendicular to each other.

[0143] The speaker 30 provided in this embodiment may include a housing 31, a magnetic circuit assembly 32, a first diaphragm 331, a second diaphragm 332, a voice coil 34, a first adjustment component 351, and a second adjustment component 352. The housing 31 has an inner cavity 311, and the magnetic circuit assembly 32 is located in the inner cavity 311. The first diaphragm 331 and the second diaphragm 332 are respectively located on two opposite sides of the magnetic circuit assembly 32, and a peripheral edge of the first diaphragm 331 and a peripheral edge of the second diaphragm 332 are both fastened to the housing 31. The second diaphragm 332, the magnetic circuit assembly 32, and the first diaphragm 331 are sequentially arranged in the thickness direction (that is, the Z-axis direction) of the speaker 30. The voice coil 34 is located between the first diaphragm 331 and the second diaphragm 332 and fastened to the first diaphragm 331 and the second diaphragm 332. The magnetic circuit assembly 32 is provided with a magnetic gap 320. The voice coil 34 is at least partially located in the magnetic gap 320. It may be understood that the voice coil 34 may be partially located in the magnetic gap 320, or the voice coil 34 may be completely located in the magnetic gap 320.

[0144] Structures and disposition manners of the housing 31, the first diaphragm 331, the second diaphragm 332, the voice coil 34, the first adjustment component 351, and the second adjustment component 352 of the speaker 30 in this embodiment may be roughly the same as those of the housing 31, the first diaphragm 331, the second diaphragm 332, the voice coil 34, the first adjustment component 351, and the second adjustment component 352 of the speaker 30 shown in FIG. 3. Same parts are not described again.

[0145] A difference between the speaker 30 in this embodiment and the speaker 30 shown in FIG. 3 lies in a structure of the magnetic circuit assembly 32. The following describes the structure of the magnetic circuit assembly 32 in this embodiment in detail.

[0146] Refer to FIG. 13, FIG. 14, and FIG. 15. FIG. 14 is a diagram of the structure of the magnetic circuit assembly 32 shown in FIG. 13 in an embodiment. FIG. 15 is a diagram of a cross-sectional structure of the speaker 30 shown in FIG. 12 in a C-C direction.

[0147] In this embodiment, the magnetic circuit assembly 32 may include a first magnet 3251, a second magnet 3252, a first magnetic conductor 3261, a second magnetic conductor 3262, a third magnetic conductor 3271, a fourth magnetic conductor 3272, a first connector 3264, a second connector 3265, a third connector 3274, and a fourth connector 3275. The first magnet 3251 and the second magnet 3252 are spaced apart, with an arrangement direction perpendicular to the thickness direction of the speaker 30. For example, the first magnet 3251 and the second magnet 3252 may be disposed opposite to each other along the width direction of the speaker 30. The first magnet 3251 may be mounted in a first slot 312 of the housing 31 in a bonding manner, and the second magnet 3252 may be mounted in a second slot 313 of the housing 31 in a bonding manner. The first slot 312 and the second slot 313 may limit the first magnet 3251 and the second magnet 3252.

[0148] For example, polarities of opposing ends of the first magnet 3251 and the second magnet 3252 are opposite, and a magnetic field loop is formed between the first magnet 3251 and the second magnet 3252. The first magnetic conductor 3261 is fastened to one side that is of the first magnet 3251 and that faces toward the first diaphragm 331, and the second magnetic conductor 3262 is fastened to one side that is of the second magnet 3252 and that faces toward the first diaphragm 331. The third magnetic conductor 3271 is fastened to one side that is of the first magnet 3251 and that faces toward the second diaphragm 332, and the fourth magnetic conductor 3272 is fastened to one side that is of the second magnet 3252 and that faces toward the second diaphragm 332. The first magnetic conductor 3261 and the third magnetic conductor 3271 may be respectively fixed, in a bonding manner, to two opposite sides of the first magnet 3251. The second magnetic conductor 3262 and the fourth magnetic conductor 3272 may be respectively fixed, in a bonding manner, to two opposite sides of the first magnet 3251. In another embodiment, the first magnet 3251, the second magnet 3252, and the first magnetic conductor 3261 to the fourth magnetic conductor 3272 may be connected in a manner other than bonding.

[0149] For example, both the first connector 3264 and the second connector 3265 may be approximately in a semi-ring shape. The first connector 3264 and the second connector 3265 are respectively connected to two ends of the first magnetic conductor 3261, and the first connector 3264 and the second connector 3265 are respectively connected to two ends of the second magnetic conductor 3262. It may be understood that the first magnetic conductor 3261 and the second magnetic conductor 3262 may be connected to form a whole by using the first connector 3264 and the second connector 3265. The first magnetic conductor 3261, the second magnetic conductor 3262, the first connector 3264, and the second connector 3265 may alternatively be integrally formed as a single structure. In this way, the first magnetic conductor 3261 and the second magnetic conductor 3262 may be assembled with other components as a whole, so as to facilitate assembly of the first magnetic conductor 3261 and the second magnetic conductor 3262. It should be understood that materials of the first connector 3264 and the second connector 3265 may be the same as or different from materials of the first magnetic conductor 3261 and the second magnetic conductor 3262.

[0150] In another embodiment, the magnetic circuit assembly 32 may alternatively not include the first connector 3264 and the second connector 3265. The first magnetic conductor 3261 and the second magnetic conductor 3262 are respectively connected to the first magnet 3251 and the second magnet 3252.

[0151] For example, both the third connector 3274 and the fourth connector 3275 may be approximately in a semi-ring shape. The third connector 3274 and the fourth connector 3275 are respectively connected to two ends of the third magnetic conductor 3271, and the third connector 3274 and the fourth connector 3275 are respectively connected to two ends of the fourth magnetic conductor 3272. It may be understood that the third magnetic conductor 3271 and the fourth magnetic conductor 3272 may be connected to form a whole by using the third connector 3274 and the fourth connector 3275. The third magnetic conductor 3271, the fourth magnetic conductor 3272, the third connector 3274, and the fourth connector 3275 may alternatively be integrally formed as a single structure. In this way, the third magnetic conductor 3271 and the fourth magnetic conductor 3272 may be assembled with other components as a whole, so as to facilitate assembly of the third magnetic conductor 3271 and the fourth magnetic conductor 3272. It should be understood that materials of the third connector 3274 and the fourth connector 3275 may be the same as or different from materials of the third magnetic conductor 3271 and the fourth magnetic conductor 3272.

[0152] In another embodiment, the magnetic circuit assembly 32 may alternatively not include the third connector 3274 and the fourth connector 3275. The third magnetic conductor 3271 and the fourth magnetic conductor 3272 are respectively connected to the first magnet 3251 and the second magnet 3252.

[0153] In another embodiment, the magnetic circuit assembly 32 may further include only the first magnet 3251 and the second magnet 3252, and does not include the first magnetic conductor 3261, the second magnetic conductor 3262, the third magnetic conductor 3271, and the fourth magnetic conductor 3272. Alternatively, the magnetic circuit assembly 32 may further include the first magnet 3251 and the second magnet 3252, and include the first magnetic conductor 3261 and the second magnetic conductor 3262; or the magnetic circuit assembly 32 may further include the first magnet 3251 and the second magnet 3252, and include the third magnetic conductor 3271 and the fourth magnetic conductor 3272.

[0154] Refer to FIG. 15 and FIG. 16. FIG. 16 is a diagram of a cross-sectional structure of the speaker 30 shown in FIG. 12 in a D-D direction.

[0155] In this embodiment, the magnetic gap 320 includes a first sub-magnetic gap 3201 and a second sub-magnetic gap 3202 that are spaced apart. The first sub-magnetic gap 3201 is located between the first magnetic conductor 3261 and the second magnetic conductor 3262, and the second sub-magnetic gap 3202 is located between the third magnetic conductor 3271 and the fourth magnetic conductor 3272. It may be understood that the first magnetic conductor 3261 and the second magnetic conductor 3262 may increase magnetic field strength of the first sub-magnetic gap 3201. Under a same magnetic field strength condition of the first sub-magnetic gap 3201, the first magnetic conductor 3261 and the second magnetic conductor 3262 enable the first magnet 3251 and the second magnet 3252 to be smaller in size, thereby facilitating miniaturization of the entire speaker 30. The third magnetic conductor 3271 and the fourth magnetic conductor 3272 may increase magnetic field strength of the second sub-magnetic gap 3202. Under a same magnetic field strength condition of the second sub-magnetic gap 3202, the third magnetic conductor 3271 and the fourth magnetic conductor 3272 enable the first magnet 3251 and the second magnet 3252 to be smaller in size, thereby facilitating miniaturization of the entire speaker 30.

[0156] For example, the first sub-magnetic gap 3201 and the second sub-magnetic gap 3202 are arranged in the thickness direction of the speaker 30. A first side portion 341 of the voice coil 34 is at least partially located in the first sub-magnetic gap 3201. It may be understood that the first side portion 341 may be completely located in the first sub-magnetic gap 3201, or may be partially located in the first sub-magnetic gap 3201. A second side portion 342 of the voice coil 34 is at least partially located in the first sub-magnetic gap 3201. It may be understood that the second side portion 342 may be completely located in the second sub-magnetic gap 3202, or may be partially located in the second sub-magnetic gap 3202.

[0157] Refer to FIG. 17. FIG. 17 is a cross-sectional view of a partial structure of the speaker 30 shown in FIG. 12 in a state in the C-C direction. For example, the voice coil 34 of the speaker 30 shown in FIG. 17 is not energized, and a vibration assembly is in a balanced position.

[0158] In this embodiment, the first adjustment component 351 is subject to a magnetic field of the first sub-magnetic gap 3201. In this case, the first sub-magnetic gap 3201 generates a static magnetic force F S1 on the first adjustment component 351. A direction of the static magnetic force F S1 points from the first diaphragm 331 to the second diaphragm 332. When the first adjustment component 351 is close to the magnetic circuit assembly 32, a magnitude of the static magnetic force F S1 increases. When the first adjustment component 351 is away from the magnetic circuit assembly 32, the magnitude of the static magnetic force F S1 decreases. The second adjustment component 352 is subject to a magnetic field of the second sub-magnetic gap 3202. In this case, the second sub-magnetic gap 3202 generates a static magnetic force F S2 on the second adjustment component 352. A direction of the static magnetic force F S2 points from the second diaphragm 332 to the first diaphragm 331. When the second adjustment component 352 is close to the magnetic circuit assembly 32, a magnitude of the static magnetic force F S2 increases. When the second adjustment component 352 is away from the magnetic circuit assembly 32, the magnitude of the static magnetic force F S2 decreases.

[0159] In this embodiment, the direction of the static magnetic force F S1 applied to the first adjustment component 351 is opposite to the direction of the static magnetic force F S2 applied to the second adjustment component 352, and when the voice coil 34 is not energized, the magnitude of the static magnetic force F S1 applied to the first adjustment component 351 is equal to the magnitude of the static magnetic force F S2 applied to the second adjustment component 352. In this case, F S1 and F S2 counteract each other, and the vibration assembly is in a balanced position.

[0160] Refer to FIG. 17 and FIG. 18. FIG. 18 is a cross-sectional view of a partial structure of the speaker 30 shown in FIG. 12 in another state in the C-C direction. For example, the voice coil 34 of the speaker 30 shown in FIG. 18 is energized, and the voice coil 34 moves from the first diaphragm 331 to the second diaphragm 332.

[0161] In this embodiment, polarization directions of the first magnet 3251 and the second magnet 3252 are opposite and are both parallel to the thickness direction of the speaker 30. For example, one end that is of the first magnet 3251 and that is close to the first magnetic conductor 3261 is an N pole, and one end that is of the first magnet 3251 and that is close to the third magnetic conductor 3271 is an S pole. In this case, the polarization direction of the first magnet 3251 points from the first magnetic conductor 3261 to the third magnetic conductor 3271, and is parallel to the thickness direction of the speaker 30. Correspondingly, one end that is of the second magnet 3252 and that is close to the second magnetic conductor 3262 is an S pole, and one end that is of the second magnet 3252 and that is close to the fourth magnetic conductor 3272 is an N pole. The polarization direction of the second magnet 3252 points from the fourth magnetic conductor 3272 to the second magnetic conductor 3262, and is parallel to the thickness direction of the speaker 30. Certainly, in other embodiments, one end that is of the first magnet 3251 and that is close to the first magnetic conductor 3261 may be an S pole, and one end that is of the first magnet 3251 and that is close to the third magnetic conductor 3271 is an N pole. In this case, the polarization direction of the first magnet 3251 points from the third magnetic conductor 3271 to the first magnetic conductor 3261, and is parallel to the thickness direction of the speaker 30. Correspondingly, one end that is of the second magnet 3252 and that is close to the second magnetic conductor 3262 is an N pole, and one end that is of the second magnet 3252 and that is close to the fourth magnetic conductor 3272 is an N pole. The polarization direction of the second magnet 3252 points from the second magnetic conductor 3262 to the fourth magnetic conductor 3272, and is parallel to the thickness direction of the speaker 30.

[0162] In this embodiment, because polarization directions of the first magnet 3251 and the second magnet 3252 are opposite, a magnetic field direction of the first sub-magnetic gap 3201 formed between the first magnetic conductor 3261 and the second magnetic conductor is opposite to a magnetic field direction of the first sub-magnetic gap 3201 formed between the third magnetic conductor 3271 and the fourth magnetic conductor. After the voice coil 34 is energized, a direction of a current in the voice coil 34 may be parallel or approximately parallel to a winding plane of the voice coil 34, the current circulates through the first side portion 341 and the second side portion 342, and directions of the current in the first side portion 341 and the second side portion 342 are opposite, but the magnetic field direction of the first sub-magnetic gap 3201 is opposite to the magnetic field direction of the second sub-magnetic gap 3202. Therefore, the first side portion 341 and the second side portion 342 of the voice coil 34 are subject to Ampere forces F B in a same direction in the magnetic field. The voice coil 34 can move along the Z-axis direction (the direction of the Ampere forces F B ) by cutting magnetic induction lines. In addition, motion consistency of the voice coil 34 is relatively strong, and driving efficiency is relatively high. In this case, the voice coil 34 can drive the first diaphragm 331, the second diaphragm 332, the first adjustment component 351, and the second adjustment component 352 to move back and forth together along the Z-axis direction. The entire vibration assembly vibrates in a same direction, and both the first diaphragm 331 and the second diaphragm 332 emit sound. It may be understood that the direction of the Ampere forces F B follows the left-hand rule, that is, the direction of the Ampere forces F B may point from the first diaphragm 331 to the second diaphragm 332, or from the second diaphragm 332 to the first diaphragm 331.

[0163] Refer to FIG. 17 and FIG. 18. In this embodiment, when the voice coil 34 moves from the first diaphragm 331 to the second diaphragm 332 after being energized, the first diaphragm 331 and the second diaphragm 332 are driven by the voice coil 34 to move from the first diaphragm 331 to the second diaphragm 332, and a direction of a restoring force F M applied to the vibration assembly points from the second diaphragm 332 to the first diaphragm 331. The first adjustment component 351 and the second adjustment component 352 are driven by the voice coil 34 to move in a direction away from the first diaphragm 331. In this case, the first adjustment component 351 is close to the magnetic circuit assembly 32, and a static magnetic force F S1 applied to the first adjustment component 351 increases. The second adjustment component 352 is far away from the magnetic circuit assembly 32, and a static magnetic force F S2 applied to the second adjustment component 352 decreases. The static magnetic force F S1 applied to the first adjustment component 351 is greater than the static magnetic force F S2 applied to the second adjustment component 352. A direction of a static magnetic force Fs applied to the first adjustment component 351 and the second adjustment component 352 as a whole points from the first diaphragm 331 to the second diaphragm 332, and is opposite to a direction of a restoring force F M applied to the vibration assembly, and increases as a displacement S1 of the first adjustment component 351 and the second adjustment component 352 increases, so that a part of the restoring force F M applied to the vibration assembly can be counteracted. The first adjustment component 351 and the second adjustment component 352 may provide a negative stiffness coefficient (-K s ) for the speaker 30, where stiffness of the vibration assembly is (K ms -K s ), and the stiffness of the vibration assembly decreases. In this way, a low-frequency radiation capability of the speaker 30 can be enhanced, and low-frequency sensitivity of the speaker 30 can be improved. In other words, low-frequency performance of the speaker 30 is improved.

[0164] Refer to FIG. 17 and FIG. 19. FIG. 19 is a schematic view of a cross-sectional structure of the speaker 30 shown in FIG. 12 in another embodiment in the C-C direction. For example, the voice coil 34 of the speaker 30 shown in FIG. 19 is energized, and the voice coil 34 moves from the second diaphragm 332 to the first diaphragm 331.

[0165] In this embodiment, when the voice coil 34 moves from the second diaphragm 332 to the first diaphragm 331 after being energized, the first diaphragm 331 and the second diaphragm 332 are driven by the voice coil 34 to move from the second diaphragm 332 to the first diaphragm 331, and a direction of a restoring force F M applied to the vibration assembly points from the first diaphragm 331 to the second diaphragm 332. The first adjustment component 351 and the second adjustment component 352 are driven by the voice coil 34 to move in a direction close to the first diaphragm 331. In this case, the first adjustment component 351 is close to the magnetic circuit assembly 32, and a static magnetic force F S1 applied to the first adjustment component 351 decreases. The second adjustment component 352 is far away from the magnetic circuit assembly 32, and a static magnetic force F S2 applied to the second adjustment component 352 increases. The static magnetic force F S1 applied to the first adjustment component 351 is less than the static magnetic force F S2 applied to the second adjustment component 352. A direction of a static magnetic force Fs applied to the first adjustment component 351 and the second adjustment component 352 as a whole points from the second diaphragm 332 to the first diaphragm 331, and is opposite to a direction of a restoring force F M applied to the vibration assembly, and increases as a displacement S2 of the first adjustment component 351 and the second adjustment component 352 increases, so that a part of the restoring force F M applied to the vibration assembly can be counteracted. The first adjustment component 351 and the second adjustment component 352 may provide a negative stiffness coefficient (-K s ) for the speaker 30, where stiffness of the vibration assembly is (K ms -K s ), and the stiffness of the vibration assembly decreases. In this way, the low-frequency radiation capability of the speaker 30 can be enhanced, and low-frequency sensitivity of the speaker 30 can be improved. In other words, low-frequency performance of the speaker 30 is improved.

[0166] Refer to FIG. 20. FIG. 20 is a schematic view of a cross-sectional structure of the speaker 30 shown in FIG. 12 in another embodiment in the C-C direction.

[0167] A structure of the speaker 30 provided in this embodiment is approximately the same as the structure of the speaker 30 in the embodiment shown in FIG. 12, and a same part is not described again. A difference is as follows: The speaker 30 provided in this embodiment includes a plurality of voice coils 34, and an arrangement direction of the plurality of voice coils 34 is parallel to the width direction of the speaker 30. It may be understood that, an appropriate length-to-width ratio may be designed for the speaker 30 based on an actual requirement, and a layout of the plurality of voice coils 34 may be designed with reference to the length-to-width ratio of the speaker 30, to improve stability of the vibration assembly in a vibration process.

[0168] In this embodiment, there are also a plurality of magnetic gaps 320, and the plurality of magnetic gaps 320 are spaced apart in the width direction of the speaker 30. The plurality of voice coils 34 are disposed to correspond to different magnetic gaps 320. It may be understood that each voice coil 34 may be partially located in a corresponding magnetic gap 320, or each voice coil 34 may be completely located in a corresponding magnetic gap 320. After the plurality of voice coils 34 are energized, the plurality of voice coils 34 may vibrate synchronously, and drive the first diaphragm 331, the second diaphragm 332, the first adjustment component 351, and the second adjustment component 352 to vibrate in a same direction. For example, there are a plurality of first adjustment components 351 and a plurality of second adjustment components 352. The plurality of first adjustment components 351 are at least partially aligned with the plurality of magnetic gaps 320 and correspond to the plurality of magnetic gaps 320 on a one-to-one basis. The plurality of second adjustment components 352 are at least partially aligned with the plurality of magnetic gaps 320 and correspond to the plurality of magnetic gaps 320 on a one-to-one basis.

[0169] For example, there are two voice coils 34 and two magnetic gaps 320. The magnetic circuit assembly 32 may be a first magnet 3251, a second magnet 3252, a third magnet 3253, a first magnetic conductor 3261, a second magnetic conductor 3262, a fifth magnetic conductor 3263, a third magnetic conductor 3271, a fourth magnetic conductor 3272, and a sixth magnetic conductor 3273. The first magnetic conductor 3261, the second magnetic conductor 3262, and the fifth magnetic conductor 3263 are sequentially disposed along the width direction of the speaker 30. In other words, the second magnetic conductor 3262 is located between the first magnetic conductor 3261 and the fifth magnetic conductor 3263 and disposed opposite to the first magnetic conductor 3261 and the fifth magnetic conductor 3263. A first sub-magnetic gap 3201 of a magnetic gap 320 is formed between the first magnetic conductor 3261 and the second magnetic conductor 3262. A first sub-magnetic gap 3201 of another magnetic gap 320 is formed between the second magnetic conductor 3262 and the fifth magnetic conductor 3263. The fourth magnetic conductor 3272 is located between the third magnetic conductor 3271 and the sixth magnetic conductor 3273 and disposed opposite to the third magnetic conductor 3271 and the sixth magnetic conductor 3273. A second sub-magnetic gap 3202 of a magnetic gap 320 is formed between the third magnetic conductor 3271 and the fourth magnetic conductor 3272. A second sub-magnetic gap 3202 of another magnetic gap 320 is formed between the fourth magnetic conductor 3272 and the sixth magnetic conductor 3273.

[0170] For example, the first side portions 341 of the two voice coils 34 are at least partially respectively located in a first sub-magnetic gap 3201 of a corresponding magnetic gap 320, and the second side portions 342 of the two voice coils 34 are at least partially respectively located in a second sub-magnetic gap 3202 of a corresponding magnetic gap 320.

[0171] In another embodiment, there may be more than two voice coils 34 and more than two magnetic gaps 320. It should be noted that shapes of the plurality of voice coils 34 may be completely the same or may be different. A specific quantity and shapes of voice coils 34 are not limited in this application.

[0172] In another embodiment, an arrangement direction of the plurality of voice coils 34 is parallel to the length direction of the speaker 30. In this case, the plurality of voice coils 34 may be arranged by fully using space in the length direction of the speaker 30. This can reduce space occupied in the width direction of the speaker 30 and facilitate miniaturization of the speaker 30 in width, thereby obtaining a slender product form and making the speaker 30 better suited for an elongated product, for example, an electronic device 1000 such as an electronic reading pen or a selfie stick. It may be understood that, in some other embodiments, an appropriate length-to-width ratio may be designed for the speaker 30 based on an actual requirement, and a layout of the plurality of voice coils 34 may be designed with reference to the length-to-width ratio of the speaker 30, to improve stability of the vibration assembly in a vibration process. Refer to FIG. 21. FIG. 21 is a schematic view of a cross-sectional structure of the speaker 30 shown in FIG. 12 in another embodiment in the C-C direction.

[0173] A structure of the speaker 30 provided in this embodiment is approximately the same as the structure of the speaker 30 in the embodiment shown in FIG. 12, and a same part is not described again. A difference is as follows: The voice coil 34 of the speaker 30 provided in this embodiment includes a first sub-voice coil 34a and a second sub-voice coil 34b. The first sub-voice coil 34a and the second sub-voice coil 34b are arranged along the thickness direction of the speaker 30. It may be understood that a plurality of sub-voice coils 34 may be arranged by fully using space in the thickness direction of the speaker 30. This can reduce space occupied in the thickness direction of the speaker 30 and facilitate miniaturization of the speaker 30 in thickness, thereby making the speaker 30 better suited for a thin flat product, for example, an electronic device 1000 such as a mobile phone, a smartwatch, or a tablet computer.

[0174] In this embodiment, the magnetic gap 320 includes a first sub-magnetic gap 3201a, a second sub-magnetic gap 3202a, a third sub-magnetic gap 3203b, and a fourth sub-magnetic gap 3204b that are spaced apart. For example, an arrangement direction of the first sub-magnetic gap 3201a and the second sub-magnetic gap 3202a is perpendicular to the thickness direction of the speaker 30. A magnetic field direction of the first sub-magnetic gap 3201a is opposite to a magnetic field direction of the second sub-magnetic gap 3202a, and a magnetic field direction of the third sub-magnetic gap 3203b is opposite to a magnetic field direction of the fourth sub-magnetic gap 3204b. An arrangement direction of the first sub-magnetic gap 3201a and the third sub-magnetic gap 3203b is parallel to the thickness direction of the speaker 30, and an arrangement direction of the second sub-magnetic gap 3202a and the fourth sub-magnetic gap 3204b is parallel to the thickness direction of the speaker 30.

[0175] For example, the magnetic circuit assembly 32 includes a first magnet 3251, a second magnet 3252, a third magnet 3253, a first magnetic conductor 3281, a second magnetic conductor 3282, a third magnetic conductor 3283, a fourth magnetic conductor 3291, a fifth magnetic conductor 3292, and a sixth magnetic conductor 3293. The first magnet 3251, the second magnet 3252, and the third magnet 3253 are spaced apart, with an arrangement direction perpendicular to the thickness direction of the speaker 30. The first magnetic conductor 3281 is fastened to one side that is of the first magnet 3251 and that faces toward the first diaphragm 331, the second magnetic conductor 3282 is fastened to one side that is of the second magnet 3252 and that faces toward the first diaphragm 331, and the third magnetic conductor 3283 is fastened to one side that is of the third magnet 3253 and that faces toward the first diaphragm 331. The first sub-magnetic gap 3201a is located between the first magnetic conductor 3281 and the second magnetic conductor 3282, and the second sub-magnetic gap 3202a is located between the second magnetic conductor 3282 and the third magnetic conductor 3283. The fourth magnetic conductor 3291 is fastened to one side that is of the first magnet 3251 and that faces toward the second diaphragm 332, the fifth magnetic conductor 3292 is fastened to one side that is of the second magnet 3252 and that faces toward the second diaphragm 332, and the sixth magnetic conductor 3293 is fastened to one side that is of the third magnet 3253 and that faces toward the second diaphragm 332. The third sub-magnetic gap 3203b is located between the fourth magnetic conductor 3291 and the fifth magnetic conductor 3292, and the fourth sub-magnetic gap 3204b is located between the fifth magnetic conductor 3292 and the sixth magnetic conductor 3293.

[0176] In this embodiment, the first sub-voice coil 34a includes a first side portion 341a and a second side portion 342a that are opposite to each other. In this embodiment of this application, the first side portion 341 and the second side portion 342 of the voice coil 34 are located on a winding plane of the voice coil 34. For example, the winding plane of the voice coil 34 may be parallel to the thickness direction of the speaker 30. The first side portion 341a is at least partially located in the first sub-magnetic gap 3201a, and the second side portion 342a is at least partially located in the second sub-magnetic gap 3202a. The second sub-voice coil 34b includes a third side portion 341b and a fourth side portion 342b that are opposite to each other, the third side portion 341b is at least partially located in the third sub-magnetic gap 3203b, and the fourth side portion 342b is at least partially located in the fourth sub-magnetic gap 3204b.

[0177] In this embodiment, the speaker 30 may further include a bracket 343. The bracket 343 is located between the first sub-voice coil 34a and the second sub-voice coil 34b and fastened to the first sub-voice coil 34a and the second sub-voice coil 34b. For the speaker 30 in this embodiment, the bracket 343 is disposed to connect the first sub-voice coil 34a and the second sub-voice coil 34b, so that the first sub-voice coil 34a and the second sub-voice coil 34b may form a whole. After the first sub-voice coil 34a and the second sub-voice coil 34b are energized, the first sub-voice coil 34a and the second sub-voice coil 34b may vibrate synchronously as a whole, thereby helping improve vibration consistency and vibration stability of the vibration assembly.

[0178] In this embodiment, the first adjustment component 351 may include a first sub-adjustment component 351a and a second sub-adjustment component 351b. Both the first sub-adjustment component 351a and the second sub-adjustment component 351b are fastened to the first diaphragm 331 and the first sub-voice coil 34a. The first sub-adjustment component 351a is at least partially aligned with the first sub-magnetic gap 3201a. The second sub-adjustment component 351b is at least partially aligned with the second sub-magnetic gap 3202a. The second adjustment component 352 may include a third sub-adjustment component 352a and a fourth sub-adjustment component 352b. Both the third sub-adjustment component 352a and the fourth sub-adjustment component 352b are fastened to the second diaphragm 332 and the second sub-voice coil 34b. The third sub-adjustment component 352a is at least partially aligned with the third sub-magnetic gap 3203b. The fourth sub-adjustment component 352b is at least partially aligned with the fourth sub-magnetic gap 3204b.

[0179] In another embodiment, the voice coil 34 may further include a third sub-voice coil, a fourth sub-voice coil, and so on. It should be noted that shapes of the plurality of sub-voice coils may be completely the same or may be different. A specific quantity and shapes of sub-voice coils 34 are not limited in this application.

[0180] Refer to FIG. 22 and FIG. 23. FIG. 22 is a diagram of a structure of the speaker 30 shown in FIG. 3 in another embodiment. FIG. 23 is a schematic exploded view of a partial structure of the speaker 30 shown in FIG. 22. For ease of description, a width direction of the speaker 30 in FIG. 22 is defined as an X-axis direction, a length direction of the speaker 30 is defined as a Y-axis direction, and a thickness direction of the speaker 30 is defined as a Z-axis direction.

[0181] The speaker 30 provided in this embodiment may include a housing 31, a magnetic circuit assembly 32, a first diaphragm 331, a second diaphragm 332, a voice coil 34, and an adjustment component 35. The housing 31 has an inner cavity 311, and the magnetic circuit assembly 32 is located in the inner cavity 311. The first diaphragm 331 and the second diaphragm 332 are respectively located on two opposite sides of the magnetic circuit assembly 32, and a peripheral edge of the first diaphragm 331 and a peripheral edge of the second diaphragm 332 are both fastened to the housing 31. The second diaphragm 332, the magnetic circuit assembly 32, and the first diaphragm 331 are sequentially arranged in the thickness direction (that is, the Z-axis direction) of the speaker 30. The magnetic circuit assembly 32 is provided with a magnetic gap 320. The voice coil 34 is located between the first diaphragm 331 and the second diaphragm 332 and fastened to the first diaphragm 331 and the second diaphragm 332. The voice coil 34 is at least partially located in the magnetic gap 320. It may be understood that the voice coil 34 may be partially located in the magnetic gap 320, or the voice coil 34 may be completely located in the magnetic gap 320. Structures and disposition manners of the housing 31, the first diaphragm 331, the second diaphragm 332, and the voice coil 34 of the speaker 30 in this embodiment may be roughly the same as those of the housing 31, the first diaphragm 331, the second diaphragm 332, and the voice coil 34 of the speaker 30 shown in FIG. 3. Same parts are not described again.

[0182] The speaker 30 provided in this embodiment may further include a first connector 361 and a second connector 362. The first connector 361 may include a peripheral portion 3611 and a connection portion 3612, and the connection portion 3612 is located on an inner side of the peripheral portion 3611 and connected to the peripheral portion 3611. The peripheral portion 3611 of the first connector 361 is located between the housing 31 and the first diaphragm 331 and fastened to the housing 31 and the first diaphragm 331. The connection portion 3612 of the first connector 361 is located between the first diaphragm 331 and the voice coil 34 and fastened to the first diaphragm 331 and the voice coil 34. The second connector 362 and the first connector 361 have a same shape.

[0183] The second connector 362 may include a peripheral portion 3621 and a connection portion 3622. The peripheral portion 3621 of the second connector 362 is located between the housing 31 and the first diaphragm 331 and fastened to the housing 31 and the second diaphragm 332. The connection portion 3622 of the second connector 362 is located between the second diaphragm 332 and the voice coil 34 and fastened to the second diaphragm 332 and the voice coil 34. Structures and disposition manners of the first connector 361 and the second connector 362 of the speaker 30 in this embodiment may be roughly the same as those of the first connector 361 and the second connector 362 shown in FIG. 3. Same parts are not described again.

[0184] Refer to FIG. 24 and FIG. 25. FIG. 24 is a diagram of a cross-sectional structure of the speaker 30 shown in FIG. 22 in an E-E direction. FIG. 25 is a diagram of a cross-sectional structure of the speaker 30 shown in FIG. 22 in an F-F direction.

[0185] In this embodiment, a structure of the magnetic circuit assembly 32 is basically the same as the structure of the magnetic circuit assembly 32 shown in FIG. 15. For a same part, refer to related descriptions in FIG. 15. Details are not described herein again. For example, the magnetic gap 320 includes a first magnetic gap 3205 and a second magnetic gap 3206, and an arrangement direction of the first magnetic gap 3205 and the second magnetic gap 3206 is parallel to the thickness direction of the speaker 30. The first magnetic gap 3205 is located between the first magnetic conductor 3261 and the second magnetic conductor 3262, and the second magnetic gap 3206 is located between the third magnetic conductor 3271 and the fourth magnetic conductor 3272. The first magnetic gap 3205 and the second magnetic gap 3206 are arranged in the thickness direction of the speaker 30.

[0186] For example, the voice coil 34 has a hollow structure, the voice coil 34 includes a first portion 344 and a second portion 345 that are spaced apart, and the first portion 344 and the second portion 345 are arranged in the thickness direction of the speaker 30. In this embodiment of this application, the first portion 344 and the second portion 345 of the voice coil 34 are located on a winding plane of the voice coil 34. For example, the winding plane of the voice coil 34 may be perpendicular to the thickness direction of the speaker 30. The first portion 344 is fastened to the first diaphragm 331 and at least partially located in the first magnetic gap 3205. It may be understood that the first portion 344 may be partially located in the first magnetic gap 3205, or the first portion 344 may be completely located in the first magnetic gap 3205. The second portion 345 is fastened to the second diaphragm 332, and the voice coil 34 is at least partially located in the second magnetic gap 3206. It may be understood that the second portion 345 may be partially located in the second magnetic gap 3206, or the first portion 344 may be completely located in the second magnetic gap 3206.

[0187] In this embodiment, the adjustment component 35 is located between the first portion 344 and the second portion 345 and fastened to the first portion 344 and the second portion 345. The adjustment component 35 is further located between the first magnetic gap 3205 and the second magnetic gap 3206. For example, the speaker 30 may further include a connecting frame 38. The connecting frame 38 is fastened to the voice coil 34 and the adjustment component 35. The connecting frame 38 is located on an inner side of the voice coil 34 and fastened to the voice coil 34. The connecting frame 38 may be approximately in a ring shape, and the connecting frame 38 is disposed around the adjustment component 35. The connecting frame 38 may be fastened to an outer peripheral side of the adjustment component 35 and an inner side of the voice coil 34 in a bonding manner. There may be one or more adjustment components 35. When there are a plurality of adjustment components 35, the plurality of adjustment components 35 are all disposed inside the voice coil 34 and connected to the voice coil 34.

[0188] For example, the adjustment component 35 may be located in a center of the magnetic circuit assembly 32. In this way, structural symmetry of a vibration assembly relative to the magnetic circuit assembly 32 is ensured, and symmetric upward and downward vibration stiffness of the vibration assembly is achieved, thereby helping improve vibration stability of the vibration assembly.

[0189] In some embodiments, the adjustment component 35 is a magnetic member. The adjustment component 35 is subject to a magnetic field of the magnetic gap 320. For example, the adjustment component 35 may be made of magnet or soft iron. A material of the adjustment component 35 is not limited in this application. For example, the adjustment component 35 may be made of soft iron. Soft iron is easily magnetized by a magnetic field and demagnetized after the external magnetic field is removed. Costs of the soft iron are relatively low, which helps reduce manufacturing costs of the speaker 30. The soft iron may be pure iron or an alloy with high iron content. For example, the adjustment component 35 may be made of steel with low carbon content, for example, "generally cold-rolled carbon steel sheet and steel strip" (SteelPlateColdCommon, SPCC). In some other embodiments, the adjustment component 35 may alternatively be made of an iron-silicon alloy, a nickel-iron alloy, or the like.

[0190] In the speaker 30 in this embodiment, because the connecting frame 38 is disposed, the adjustment component 35 may be first assembled with the connecting frame 38, and then the connecting frame 38 is assembled with the voice coil 34. In this way, the adjustment component 35 is fastened to the voice coil 34, and a manner of assembling the adjustment component 35 and the voice coil 34 is relatively simple. In another embodiment, the speaker 30 may alternatively not be provided with the connecting frame 38, and the adjustment component 35 may be fastened to the voice coil 34 in a bonding manner or in another manner. A manner of connecting the adjustment component 35 to the voice coil 34 is not limited in this application.

[0191] Refer to FIG. 26. FIG. 26 is a cross-sectional view of a partial structure of the speaker 30 shown in FIG. 22 in a state in the E-E direction. For example, the voice coil 34 of the speaker 30 shown in FIG. 26 is not energized, and the vibration assembly is in a balanced position.

[0192] In this embodiment, the adjustment component 35 is subject to a magnetic field of the first magnetic gap 3205 and the second magnetic gap 3206, and the first magnetic gap 3205 generates a static magnetic force F S1 on the adjustment component 35. A direction of the static magnetic force F S1 points from the second diaphragm 332 to the first diaphragm 331. When the adjustment component 35 is close to the first magnetic gap 3205, a magnitude of the static magnetic force F S1 increases. When the adjustment component 35 is away from the first magnetic gap 3205, the magnitude of the static magnetic force F S1 decreases. The second magnetic gap 3206 generates a static magnetic force F S2 on the adjustment component 35. A direction of the static magnetic force F S2 points from the first diaphragm 331 to the second diaphragm 332. When the adjustment component 35 is close to the second magnetic gap 3206, a magnitude of the static magnetic force F S2 increases. When the adjustment component 35 is away from the second magnetic gap 3206, the magnitude of the static magnetic force F S2 decreases. A direction of the static magnetic force F S1 applied to the adjustment component 35 is opposite to a direction of the static magnetic force F S2 , and when the voice coil 34 is not energized, the magnitude of the static magnetic force F S1 applied to the adjustment component 35 is equal to the magnitude of the static magnetic force F S2 . In this case, F S1 and F S2 counteract each other, and the vibration assembly is in a balanced position.

[0193] Refer to FIG. 26 and FIG. 27. FIG. 27 is a cross-sectional view of a partial structure of the speaker 30 shown in FIG. 22 in another state in the E-E direction. For example, the voice coil 34 of the speaker 30 shown in FIG. 27 is energized, and the voice coil 34 moves from the first diaphragm 331 to the second diaphragm 332.

[0194] For example, polarization directions of the first magnet 3251 and the second magnet 3252 are opposite and are both parallel to the thickness direction of the speaker 30. A magnetic field direction of the first magnetic gap 3205 formed between the first magnetic conductor 3261 and the second magnetic conductor 3262 is opposite to a magnetic field direction of the first magnetic gap 3205 formed between the third magnetic conductor 3271 and the fourth magnetic conductor. After the voice coil 34 is energized, a direction of a current in the voice coil 34 may be parallel or approximately parallel to the winding plane of the voice coil 34, the current circulates through the first portion 344 and the second portion 345, and directions of the current in the first portion 344 and the second portion 345 are opposite, but the magnetic field direction of the first magnetic gap 3205 is opposite to the magnetic field direction of the second magnetic gap 3206. Therefore, the first portion 344 and the second portion 345 of the voice coil 34 are subject to Ampere forces F B in a same direction in the magnetic field. The voice coil 34 can move along the Z-axis direction (the direction of the Ampere forces F B ) by cutting magnetic induction lines. In addition, motion consistency of the voice coil 34 is relatively strong, and driving efficiency is relatively high. In this case, the voice coil 34 can drive the first diaphragm 331, the second diaphragm 332, the adjustment component 35 to move back and forth together along the Z-axis direction. It may be understood that the direction of the Ampere forces F B follows the left-hand rule, that is, the direction of the Ampere forces F B may point from the first diaphragm 331 to the second diaphragm 332, or from the second diaphragm 332 to the first diaphragm 331.

[0195] In this embodiment, when the voice coil 34 moves from the first diaphragm 331 to the second diaphragm 332 after being energized, the first diaphragm 331 and the second diaphragm 332 are driven by the voice coil 34 to move from the first diaphragm 331 to the second diaphragm 332, and a direction of a restoring force F M provided by the first diaphragm 331 and the second diaphragm 332 points from the second diaphragm 332 to the first diaphragm 331. The adjustment component 35 is also driven by the voice coil 34 to move in a direction away from the first diaphragm 331. In this case, the adjustment component 35 is close to the second magnetic gap 3206 and far away from the first magnetic gap 3205, and a static magnetic force F S1 applied to the adjustment component 35 is less than a static magnetic force F S2 . In other words, a direction of a static magnetic force F S applied to the adjustment component 35 as a whole points from the first diaphragm 331 to the second diaphragm 332, and is opposite to a direction of a restoring force F M applied to the vibration assembly, and increases as a displacement S1 of the adjustment component 35 increases, so that a part of the restoring force F M applied to the vibration assembly can be counteracted. The adjustment component 35 may provide a negative stiffness coefficient (-K s ) for the speaker 30, where stiffness of the vibration assembly is (K ms -K s ), and the stiffness of the vibration assembly decreases. In this way, a low-frequency radiation capability of the speaker 30 can be enhanced, and low-frequency sensitivity of the speaker 30 can be improved. In other words, low-frequency performance of the speaker 30 is improved.

[0196] Refer to FIG. 26 and FIG. 28. FIG. 28 is a schematic view of a cross-sectional structure of the speaker 30 shown in FIG. 22 in another embodiment in the E-E direction. For example, the voice coil 34 of the speaker 30 shown in FIG. 28 is energized, and the voice coil 34 moves from the second diaphragm 332 to the first diaphragm 331.

[0197] In this embodiment, when the voice coil 34 moves from the second diaphragm 332 to the first diaphragm 331 after being energized, the first diaphragm 331 and the second diaphragm 332 are driven by the voice coil 34 to move from the second diaphragm 332 to the first diaphragm 331, and a direction of a restoring force F M provided by the first diaphragm 331 and the second diaphragm 332 points from the first diaphragm 331 to the second diaphragm 332. The adjustment component 35 is also driven by the voice coil 34 to move in a direction close to the first diaphragm 331. In this case, the adjustment component 35 is close to the first magnetic gap 3205 and far away from the second magnetic gap 3206, and a static magnetic force F S1 applied to the adjustment component 35 is greater than a static magnetic force F S2 . In other words, a direction of a static magnetic force F S applied to the adjustment component 35 as a whole points from the second diaphragm 332 to the first diaphragm 331, and is opposite to a direction of a restoring force F M applied to the vibration assembly, and increases as a displacement S2 of the adjustment component 35 increases, so that a part of the restoring force F M applied to the vibration assembly can be counteracted. The adjustment component 35 may provide a negative stiffness coefficient (-K s ) for the speaker 30, where stiffness of the vibration assembly is (K ms -K s ), and the stiffness of the vibration assembly decreases. In this way, the low-frequency radiation capability of the speaker 30 can be enhanced, and low-frequency sensitivity of the speaker 30 can be improved. In other words, low-frequency performance of the speaker 30 is improved.

[0198] In this embodiment of this application, changing the size of the adjustment component 35 can enable the adjustment component 35 to provide different negative stiffness coefficients for the speaker 30, and enable the vibration assembly to achieve different stiffness reduction effects. In this way, different improvements can be achieved in low-frequency performance of the speaker 30, and various types of speakers 30 can be designed more conveniently.

[0199] The following compares a plurality of parameters (including stiffness, mass, first resonance frequency f 0 , sensitivity SPL, and the like) of the speaker in different implementation solutions by using a table, to describe impact of the size of the adjustment component 35 on performance of the speaker 30. Three implementation solutions of the speaker listed in the table are as follows: (1) The speaker does not include an adjustment component. (2) The speaker 30 includes an adjustment component 35 and a connecting frame 38, and a size (length*width*thickness) of the adjustment component 35 is 0.75 mm*0.5 mm*0.35 mm. The adjustment component 35 is made of soft iron. There may be two adjustment components 35. The mass of the two adjustment components 35 is 2 mg. The mass of the connecting frame 38 is 3 mg. (3) The speaker 30 includes an adjustment component 35 and a connecting frame 38, and a size (length*width*thickness) of the adjustment component 35 is 0.75 mm*1 mm*0.35 mm. The adjustment component 35 is made of soft iron. There may be two adjustment components 35. The mass of the two adjustment components 35 is 4 mg. The mass of the connecting frame 38 is 3 mg. SolutionStiffness K ms (N / mm)Mass M ms (mg)f 0 (Hz)Low-frequency (100 Hz) SPL (dB)(1)0.1859222670.1(2)0.185-0.0992+2+316470.1+4(3)0.185-0.1592+4+310770.1+5.6

[0200] As shown in the foregoing table, when the solution (1) is used, the stiffness of the speaker is approximately 0.185 N / mm. The first resonance frequency f 0 is approximately 226 Hz. The low-frequency (100 Hz) sensitivity (SPL) of the speaker is approximately 70.1 dB at 0.02 W operating power.

[0201] When the solution (2) is used, the stiffness of the speaker 30 is approximately 0.095 N / mm, which is reduced by approximately 0.09 N / mm compared with the solution (1). The first resonance frequency f 0 is approximately 164 Hz, which is reduced by approximately 62 Hz compared with the solution (1). At 0.02 W operating power, the low-frequency (100 Hz) sensitivity (SPL) of the speaker 30 is approximately 74.1 dB, which is increased by approximately 4 dB compared with the solution (1). Compared with the solution (1), the solution (2) improves the low-frequency radiation capability.

[0202] When the solution (3) is used, the stiffness of the speaker 30 is approximately 0.035 N / mm, which is reduced by approximately 0.15 N / mm compared with the solution (1). The first resonance frequency f 0 is approximately 107 Hz, which is reduced by approximately 119 Hz compared with the solution (1). At 0.02 W operating power, the low-frequency (100 Hz) sensitivity (SPL) of the speaker 30 is increased by approximately 5.6 dB compared with the solution (1). Compared with the solution (1), the solution (3) improves the low-frequency radiation capability.

[0203] Refer to FIG. 29. FIG. 29 is a frequency response curve of the speaker 30 at same operating power in different implementation solutions. In the frequency response curve of the speaker 30 shown in FIG. 29, a horizontal coordinate is a frequency (in Hz) of the speaker 30, and a vertical coordinate is sensitivity (in dB) of the speaker 30. For example, FIG. 29 separately shows a frequency response curve of a solution in which the speaker 30 includes the adjustment component 35 and a frequency response curve of a solution in which the speaker 30 does not include the adjustment component 35. For example, in FIG. 29, a dashed line is used to show the frequency response curve of the solution in which the speaker 30 includes the adjustment component 35, and a solid line is used to show the frequency response curve of the solution in which the speaker does not include the adjustment component 35.

[0204] In some embodiments, the speaker 30 may include an adjustment component 35 and a connecting frame 38, and a size (length*width*thickness) of the adjustment component 35 is 0.75 mm*0.5 mm*0.35 mm. For example, the speaker 30 may use the foregoing implementation solution (2). At same operating power (0.02 W), compared with the solution (that is, the implementation solution (1)) in which the speaker 30 does not include the adjustment component 35, the solution (that is, the implementation solution (2)) in which the speaker 30 includes the adjustment component 35 can improve low-frequency (100 Hz) sensitivity of the speaker 30 provided in this embodiment of this application by approximately 3 dB, and reduce the first resonance frequency f 0 , thereby significantly improving the low-frequency radiation capability of the speaker 30.

[0205] Refer to FIG. 30. FIG. 30 is a schematic view of a cross-sectional structure of the speaker 30 shown in FIG. 22 in another embodiment in the E-E direction.

[0206] A structure of the speaker 30 provided in this embodiment is approximately the same as the structure of the speaker 30 in the embodiment shown in FIG. 22, and a same part is not described again. A difference is as follows: The speaker 30 provided in this embodiment includes a plurality of voice coils 34, and an arrangement direction of the plurality of voice coils 34 is parallel to the width direction of the speaker 30. It may be understood that an appropriate length-to-width ratio may be designed for the speaker 30 based on an actual requirement, and a layout of the plurality of voice coils 34 may be designed with reference to the length-to-width ratio of the speaker 30, to improve stability of the vibration assembly in a vibration process.

[0207] In this embodiment, there are also a plurality of magnetic gaps 320, and the plurality of magnetic gaps 320 are spaced apart in the width direction of the speaker 30. The plurality of voice coils 34 are disposed to correspond to magnetic gaps 320. Each magnetic gap 320 includes a first magnetic gap 3205 and a second magnetic gap 3206. The plurality of voice coils 34 are at least partially located in the plurality of magnetic gaps 320 and correspond to the plurality of magnetic gaps 320 on a one-to-one basis. It may be understood that each voice coil 34 may be partially located in a corresponding magnetic gap 320, or each voice coil 34 may be completely located in a corresponding magnetic gap 320. After the plurality of voice coils 34 are energized, the plurality of voice coils 34 may vibrate synchronously, and drive the first diaphragm 331, the second diaphragm 332, and the adjustment component 35 to vibrate in a same direction.

[0208] For example, there are two voice coils 34 and two magnetic gaps 320. The magnetic circuit assembly 32 may be a first magnet 3251, a second magnet 3252, a third magnet 3253, a first magnetic conductor 3261, a second magnetic conductor 3262, a fifth magnetic conductor 3263, a third magnetic conductor 3271, a fourth magnetic conductor 3672, and a sixth magnetic conductor 3273. The first magnetic conductor 3261, the second magnetic conductor 3262, and the fifth magnetic conductor 3263 are sequentially disposed along the width direction of the speaker 30. In other words, the second magnetic conductor 3262 is located between the first magnetic conductor 3261 and the fifth magnetic conductor 3263 and disposed opposite to the first magnetic conductor 3261 and the fifth magnetic conductor 3263. A first magnetic gap 3205 of a magnetic gap 320 is formed between the first magnetic conductor 3261 and the second magnetic conductor 3262. A first magnetic gap 3205 of another magnetic gap 320 is formed between the second magnetic conductor 3262 and the fifth magnetic conductor 3263. The fourth magnetic conductor 3272 is located between the third magnetic conductor 3271 and the sixth magnetic conductor 3273 and disposed opposite to the third magnetic conductor 3271 and the sixth magnetic conductor 3273. A second magnetic gap 3206 of a magnetic gap 320 is formed between the third magnetic conductor 3271 and the fourth magnetic conductor 3272. A second magnetic gap 3206 of another magnetic gap 320 is formed between the fourth magnetic conductor 3272 and the sixth magnetic conductor 3273.

[0209] For example, the winding plane of the voice coil 34 is parallel to the thickness direction of the speaker 30. The first portions 344 of the two voice coils 34 are at least partially respectively located in a first magnetic gap 3205 of a corresponding magnetic gap 320, and the second portions 345 of the two voice coils 34 are at least partially respectively located in a second magnetic gap 3206 of a corresponding magnetic gap 320.

[0210] In another embodiment, there may be more than two voice coils 34 and more than two magnetic gaps 320. It should be noted that shapes of the plurality of voice coils 34 may be completely the same or may be different. A specific quantity and shapes of voice coils 34 are not limited in this application.

[0211] In this embodiment, there are a plurality of adjustment components 35. The plurality of adjustment components 35 are disposed between a plurality of first magnetic gaps 3205 and a plurality of second magnetic gaps 3206 and correspond to the plurality of first magnetic gaps 3205 and the plurality of second magnetic gaps 3206 on a one-to-one basis.

[0212] In another embodiment, an arrangement direction of the plurality of voice coils 34 is parallel to the length direction of the speaker 30. All the plurality of voice coils 34 are at least partially located in a same magnetic gap 320. It may be understood that each voice coil 34 may be partially located in a magnetic gap 320, or each voice coil 34 may be completely located in a magnetic gap 320. After the plurality of voice coils 34 are energized, the plurality of voice coils 34 may vibrate synchronously, and drive the first diaphragm 331, the second diaphragm 332, and the adjustment component 35 to vibrate in a same direction. The plurality of voice coils 34 may be arranged by fully using space in the length direction of the speaker 30. This can reduce space occupied in the width direction of the speaker 30 and facilitate miniaturization of the speaker 30 in width, thereby obtaining a slender product form and making the speaker 30 better suited for an elongated product, for example, an electronic device 1000 such as an electronic reading pen or a selfie stick. It may be understood that, in some other embodiments, an appropriate length-to-width ratio may be designed for the speaker 30 based on an actual requirement, and a layout of the plurality of voice coils 34 may be designed with reference to the length-to-width ratio of the speaker 30, to improve stability of the vibration assembly in a vibration process.

[0213] In some embodiments, for a structure of the magnetic circuit assembly 32 of the speaker 30, refer to the structure of the magnetic circuit assembly 32 shown in FIG. 5. The magnetic circuit assembly 32 may include a first magnetic component 321 and a second magnetic component 322. The first magnetic component 321 and the second magnetic component 322 are spaced apart along the thickness direction of the speaker 30. For example, the first magnetic component 321 and the second magnetic component 322 may be disposed opposite to each other. The first magnetic component 321 may include a first magnetic member 3211 and a second magnetic member 3212 that are spaced apart. An arrangement direction of the first magnetic member 3211 and the second magnetic member 3212 is perpendicular to the thickness direction of the speaker 30. Polarities of opposing ends of the first magnetic member 3211 and the second magnetic member 3212 are opposite, and a first magnetic gap 3205 is formed between the first magnetic member 3211 and the second magnetic member 3212. The second magnetic component 322 may include a third magnetic member 3221 and a fourth magnetic member 3222 that are spaced apart. An arrangement direction of the third magnetic member 3221 and the fourth magnetic member 3222 is perpendicular to the thickness direction of the speaker 30. Polarities of opposing ends of the third magnetic member 3221 and the fourth magnetic member 3222 are opposite, and a second magnetic gap 3206 is formed between the third magnetic member 3221 and the fourth magnetic member 3222.

[0214] Refer to FIG. 31. FIG. 31 is a schematic view of a cross-sectional structure of the speaker 30 shown in FIG. 22 in another embodiment in the E-E direction.

[0215] A structure of the speaker 30 provided in this embodiment is approximately the same as the structure of the speaker 30 in the embodiment shown in FIG. 12, and a same part is not described again. A difference is as follows: The first portion 344 of the voice coil 34 of the speaker 30 provided in this embodiment is a first sub-voice coil. The second portion 345 of the voice coil 34 is a second sub-voice coil. The first sub-voice coil and the second sub-voice coil are arranged along the thickness direction of the speaker 30. It may be understood that a plurality of sub-voice coils may be arranged by fully using space in the thickness direction of the speaker 30. This can reduce space occupied in the thickness direction of the speaker 30 and facilitate miniaturization of the speaker 30 in thickness, thereby making the speaker 30 better suited for a thin flat product, for example, an electronic device 1000 such as a mobile phone, a smartwatch, or a tablet computer.

[0216] For example, the first magnetic gap 3205 includes a first sub-magnetic gap 3205a and a second sub-magnetic gap 3205b that are spaced apart, and an arrangement direction of the first sub-magnetic gap 3205a and the second sub-magnetic gap 3205b is perpendicular to the thickness direction of the speaker 30. A magnetic field direction of the first sub-magnetic gap 3205a is opposite to a magnetic field direction of the second sub-magnetic gap 3205b. The second magnetic gap 3206 includes a third sub-magnetic gap 3206a and a fourth sub-magnetic gap 3206b that are spaced apart, and a magnetic field direction of the third sub-magnetic gap 3206a is opposite to a magnetic field direction of the fourth sub-magnetic gap 3206b. The first sub-magnetic gap 3205a and the third sub-magnetic gap 3206a are spaced apart, with an arrangement direction parallel to the thickness direction of the speaker 30. The second sub-magnetic gap 3205b and the fourth sub-magnetic gap 3206b are spaced apart, with an arrangement direction parallel to the thickness direction of the speaker 30.

[0217] For example, the magnetic circuit assembly 32 includes a first magnet 3251, a second magnet 3252, a third magnet 3253, a first magnetic conductor 3281, a second magnetic conductor 3282, a third magnetic conductor 3283, a fourth magnetic conductor 3291, a fifth magnetic conductor 3292, and a sixth magnetic conductor 3293. The first magnet 3251, the second magnet 3252, and the third magnet 3253 are spaced apart, with an arrangement direction perpendicular to the thickness direction of the speaker 30. The first magnetic conductor 3281 is fastened to one side that is of the first magnet 3251 and that faces toward the first diaphragm 331, the second magnetic conductor 3282 is fastened to one side that is of the second magnet 3252 and that faces toward the first diaphragm 331, and the third magnetic conductor 3283 is fastened to one side that is of the third magnet 3253 and that faces toward the first diaphragm 331. The first sub-magnetic gap 3205a is located between the first magnetic conductor 3281 and the second magnetic conductor 3282, and the second sub-magnetic gap 3205b is located between the second magnetic conductor 3282 and the third magnetic conductor 3283. The fourth magnetic conductor 3291 is fastened to one side that is of the first magnet 3251 and that faces toward the second diaphragm 332, the fifth magnetic conductor 3292 is fastened to one side that is of the second magnet 3252 and that faces toward the second diaphragm 332, and the sixth magnetic conductor 3293 is fastened to one side that is of the third magnet 3253 and that faces toward the second diaphragm 332. The third sub-magnetic gap 3206a is located between the fourth magnetic conductor 3291 and the fifth magnetic conductor 3292, and the fourth sub-magnetic gap 3206b is located between the fifth magnetic conductor 3292 and the sixth magnetic conductor 3293.

[0218] In this implementation of this application, the first magnetic conductor 3281 and the second magnetic conductor 3282 may increase magnetic field strength of the first sub-magnetic gap 3205a. Under a same magnetic field strength condition of the first sub-magnetic gap 3205a, the first magnetic conductor 3281 and the second magnetic conductor 3282 enable the first magnet 3251 and the second magnet 3252 to be smaller in size, thereby facilitating miniaturization of the entire speaker 30. The second magnetic conductor 3282 and the third magnetic conductor 3283 may increase magnetic field strength of the second sub-magnetic gap 3205b. Under a same magnetic field strength condition of the second sub-magnetic gap, the second magnetic conductor 3282 and the third magnetic conductor 3283 enable the second magnet 3252 and the third magnet 3253 to be smaller in size, thereby facilitating miniaturization of the entire speaker 30. The fourth magnetic conductor 3291 and the fifth magnetic conductor 3292 may increase magnetic field strength of the third sub-magnetic gap 3206a. Under a same magnetic field strength condition of the third sub-magnetic gap 3206a, the fourth magnetic conductor 3291 and the fifth magnetic conductor 3292 enable the first magnet 3251 and the second magnet 3252 to be smaller in size, thereby facilitating miniaturization of the entire speaker 30. The fifth magnetic conductor 3292 and the sixth magnetic conductor 3293 may increase magnetic field strength of the fourth sub-magnetic gap 3206b. Under a same magnetic field strength condition of the fourth sub-magnetic gap 3206b, the fifth magnetic conductor 3292 and the sixth magnetic conductor 3293 enable the second magnet 3252 and the third magnet 3253 to be smaller in size, thereby facilitating miniaturization of the entire speaker 30.

[0219] In this embodiment, the first portion 344 (that is, the first sub-voice coil) of the voice coil 34 includes a first side portion 3441 and a second side portion 3442 that are opposite to each other. The first side portion 3441 is at least partially located in the first sub-magnetic gap 3205a, and the second side portion 3442 is at least partially located in the second sub-magnetic gap 3205b. The second portion 345 (that is, the second sub-voice coil) of the voice coil 34 includes a third side portion 3451 and a fourth side portion 3452 that are opposite to each other. The third side portion 3451 is at least partially located in the third sub-magnetic gap 3206a, and the fourth side portion 3452 is at least partially located in the fourth sub-magnetic gap 3206b.

[0220] In this embodiment, the speaker 30 may further include a bracket 343. The bracket 343 is located between the first portion 344 and the second portion 345 and fastened to the first portion 344 and the second portion 345. For the speaker 30 in this embodiment, the bracket 343 is disposed to connect the first portion 344 and the second portion 345, so that the first portion 344 and the second portion 345 may form a whole. After the first portion 344 and the second portion 345 are energized, the first portion 344 and the second portion 345 may vibrate synchronously as a whole, thereby helping improve vibration consistency and vibration stability of the vibration assembly.

[0221] In this embodiment, the adjustment component 35 may include a first sub-adjustment component 35a and a second sub-adjustment component 35b. The first sub-adjustment component 35a is fastened to the first portion 344 and disposed between the first sub-magnetic gap 3205a and the third sub-magnetic gap 3206a. The second sub-adjustment component 35b is fastened to the second portion 345 and disposed between the second sub-magnetic gap 3205b and the fourth sub-magnetic gap 3206b.

[0222] In another embodiment, the voice coil 34 may further include a third sub-voice coil, a fourth sub-voice coil, and so on. It should be noted that shapes of the plurality of sub-voice coils may be completely the same or may be different. A specific quantity and shapes of sub-voice coils are not limited in this application.

[0223] In some embodiments, for a structure of the magnetic circuit assembly 32 of the speaker 30, refer to the structure of the magnetic circuit assembly 32 shown in FIG. 11. The magnetic circuit assembly 32 may include a first magnetic component 321 and a second magnetic component 322. The first magnetic component 323 and the second magnetic component 324 are arranged along the thickness direction of the speaker 30. The first magnetic component 323 includes a first magnetic member 3231 and a second magnetic member 3232 that are spaced apart, and a third magnetic member 3233 and a fourth magnetic member 3234 that are spaced apart. An arrangement direction of the first magnetic member 3231, the second magnetic member 3232, the third magnetic member 3233, and the fourth magnetic member 3234 is perpendicular to the thickness direction of the speaker 30. Polarities of opposing ends of the first magnetic member 3231 and the second magnetic member 3232 are opposite, and a first sub-magnetic gap 3201a is formed between the first magnetic member 3231 and the second magnetic member 3232. Polarities of opposing ends of the third magnetic member 3233 and the fourth magnetic member 3234 are opposite, and a second sub-magnetic gap 3202a is formed between the third magnetic member 3233 and the fourth magnetic member 3234. The second magnetic component 324 includes a fifth magnetic member 3241 and a sixth magnetic member 3242 that are spaced apart, and a seventh magnetic member 3243 and an eighth magnetic member 3244 that are spaced apart. An arrangement direction of the fifth magnetic member 3241, the sixth magnetic member 3242, the seventh magnetic member 3243, and the eighth magnetic member 3244 is perpendicular to the thickness direction of the speaker 30. Polarities of opposing ends of the fifth magnetic member 3241 and the sixth magnetic member 3242 are opposite, and a third sub-magnetic gap 3203b is formed between the fifth magnetic member 3241 and the sixth magnetic member 3242. Polarities of opposing ends of the seventh magnetic member 3243 and the eighth magnetic member 3244 are opposite, and a fourth sub-magnetic gap 3204b is formed between the seventh magnetic member 3243 and the eighth magnetic member 3244. In this embodiment, a structure of the magnetic circuit assembly 32 is relatively simple, and manufacturing costs of the speaker 30 are relatively low.

[0224] It should be noted that all the foregoing accompanying drawings are example illustrations of this application, and do not represent an actual size of a product. In addition, a size proportional relationship between components in the accompanying drawings is not intended to limit an actual product in this application.

[0225] The foregoing descriptions are merely some implementations of this application, but are not intended to limit the protection scope of this application. Any variation or replacement readily figured out by a person skilled in the art within the technical scope disclosed in this application shall fall within the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

1. A speaker (30), comprising: a housing (31) having an inner cavity (311); a magnetic circuit assembly (32), located in the inner cavity (311) and fastened to the housing (31), wherein the magnetic circuit assembly (32) is provided with a magnetic gap (320); a first diaphragm (331) and a second diaphragm (332), respectively located on two opposite sides of the magnetic circuit assembly (32), wherein a peripheral edge of the first diaphragm (331) and a peripheral edge of the second diaphragm (332) are both fastened to the housing (31); a voice coil (34), located between the first diaphragm (331) and the second diaphragm (332), and fastened to the first diaphragm (331) and the second diaphragm (332), wherein the voice coil (34) is at least partially located in the magnetic gap (320); and a first adjustment component (351) and a second adjustment component (352), wherein the first adjustment component (351) and the second adjustment component (352) are respectively located on the two opposite sides of the magnetic circuit assembly (32), both the first adjustment component (351) and the second adjustment component (352) are at least partially aligned with the magnetic gap (320) in a thickness direction of the speaker (30), the first adjustment component (351) is fastened to the first diaphragm (331) and / or the voice coil (34), and the second adjustment component (352) is fastened to the second diaphragm (332) and / or the voice coil (34), wherein both the first adjustment component (351) and the second adjustment component (352) are magnetic members.

2. The speaker (30) according to claim 1, wherein the first adjustment component (351) is located between the first diaphragm (331) and the voice coil (34) and fastened to the first diaphragm (331) and the voice coil (34); and the second adjustment component (352) is located between the second diaphragm (332) and the voice coil (34) and fastened to the second diaphragm (332) and the voice coil (34).

3. The speaker (30) according to claim 1 or 2, wherein the first adjustment component (351) and / or the second adjustment component (352) are / is made of soft iron.

4. The speaker (30) according to any one of claims 1 to 3, wherein the magnetic gap (320) comprises a first sub-magnetic gap (3201) and a second sub-magnetic gap (3202) that are spaced apart, the first sub-magnetic gap (3201) and the second sub-magnetic gap (3202) are arranged in the thickness direction of the speaker (30), and a magnetic field direction of the first sub-magnetic gap (3201) is opposite to a magnetic field direction of the second sub-magnetic gap (3202); and the voice coil (34) comprises a first side portion (341) and a second side portion (342) that are opposite and spaced apart, the first side portion (341) is fastened to the first diaphragm (331) and at least partially located in the first sub-magnetic gap (3201), and the second side portion (342) is fastened to the second diaphragm (332) and at least partially located in the second sub-magnetic gap (3202).

5. The speaker (30) according to claim 4, wherein the magnetic circuit assembly (32) comprises a first magnetic component (321) and a second magnetic component (322), and the first magnetic component (321) and the second magnetic component (322) are arranged along the thickness direction of the speaker (30); the first magnetic component (321) comprises a first magnetic member (3211) and a second magnetic member (3212) that are spaced apart, an arrangement direction of the first magnetic member (3211) and the second magnetic member (3212) is perpendicular to the thickness direction of the speaker (30), polarities of opposing ends of the first magnetic member (3211) and the second magnetic member (3212) are opposite, and the first sub-magnetic gap (3201) is formed between the first magnetic member (3211) and the second magnetic member (3212); and the second magnetic component (322) comprises a third magnetic member (3221) and a fourth magnetic member (3222) that are spaced apart, an arrangement direction of the third magnetic member (3221) and the fourth magnetic member (3222) is perpendicular to the thickness direction of the speaker (30), polarities of opposing ends of the third magnetic member (3221) and the fourth magnetic member (3222) are opposite, and the second sub-magnetic gap (3202) is formed between the third magnetic member (3221) and the fourth magnetic member (3222).

6. The speaker (30) according to claim 4, wherein the magnetic circuit assembly (32) comprises a first magnet (3251), a second magnet (3252), a first magnetic conductor (3261), a second magnetic conductor (3262), a third magnetic conductor (3271), and a fourth magnetic conductor (3272); the first magnet (3251) and the second magnet (3252) are spaced apart, with an arrangement direction perpendicular to the thickness direction of the speaker (30), and polarization directions of the first magnet (3251) and the second magnet (3252) are opposite and are both parallel to the thickness direction of the speaker (30); the first magnetic conductor (3261) is fastened to one side that is of the first magnet (3251) and that faces toward the first diaphragm (331), the second magnetic conductor (3262) is fastened to one side that is of the second magnet (3252) and that faces toward the first diaphragm (331), and the first sub-magnetic gap (3201) is located between the first magnetic conductor (3261) and the second magnetic conductor (3262); and the third magnetic conductor (3271) is fastened to one side that is of the first magnet (3251) and that faces toward the second diaphragm (332), the fourth magnetic conductor (3272) is fastened to one side that is of the second magnet (3252) and that faces toward the second diaphragm (332), and the second sub-magnetic gap (3202) is located between the third magnetic conductor (3271) and the fourth magnetic conductor (3272).

7. The speaker (30) according to any one of claims 4 to 6, wherein there are a plurality of voice coils (34), an arrangement direction of the plurality of voice coils (34) is parallel to a length direction of the speaker (30), the length direction of the speaker (30) is perpendicular to the thickness direction of the speaker (30), and the plurality of voice coils (34) are at least partially located in the same magnetic gap (320); or there are a plurality of magnetic gaps (320), the plurality of magnetic gaps (320) are spaced apart in a width direction of the speaker (30), the width direction of the speaker (30) is perpendicular to the thickness direction of the speaker (30), there are a plurality of voice coils (34), an arrangement direction of the plurality of voice coils (34) is parallel to the width direction of the speaker (30), and the plurality of voice coils (34) are disposed to correspond to different magnetic gaps (320).

8. The speaker (30) according to any one of claims 1 to 3, wherein the magnetic gap (320) comprises a first sub-magnetic gap (3201a), a second sub-magnetic gap (3202a), a third sub-magnetic gap (3203b), and a fourth sub-magnetic gap (3204b) that are spaced apart; an arrangement direction of the first sub-magnetic gap (3201a) and the second sub-magnetic gap (3202a) is perpendicular to the thickness direction of the speaker (30), and a magnetic field direction of the first sub-magnetic gap (3201a) is opposite to a magnetic field direction of the second sub-magnetic gap (3202a); an arrangement direction of the third sub-magnetic gap (3203b) and the fourth sub-magnetic gap (3204b) is perpendicular to the thickness direction of the speaker (30), and a magnetic field direction of the third sub-magnetic gap (3203b) is opposite to a magnetic field direction of the fourth sub-magnetic gap (3204b); and an arrangement direction of the first sub-magnetic gap (3201a) and the third sub-magnetic gap (3203b) is parallel to the thickness direction of the speaker (30), and an arrangement direction of the second sub-magnetic gap (3202a) and the fourth sub-magnetic gap (3204b) is parallel to the thickness direction of the speaker (30); and the voice coil (34) comprises a first sub-voice coil (34a) and a second sub-voice coil (34b), and the first sub-voice coil (34a) and the second sub-voice coil (34b) are arranged along the thickness direction of the speaker (30); the first sub-voice coil (34a) comprises a first side portion (341a) and a second side portion (342a) that are disposed opposite to each other, the first side portion (341a) is at least partially located in the first sub-magnetic gap (3201a), and the second side portion (342a) is at least partially located in the second sub-magnetic gap (3202a); and the second sub-voice coil (34b) comprises a third side portion (341b) and a fourth side portion (342b) that are disposed opposite to each other, the third side portion (341b) is at least partially located in the third sub-magnetic gap (3203b), and the fourth side portion (342b) is at least partially located in the fourth sub-magnetic gap (3204b).

9. The speaker (30) according to claim 8, wherein the magnetic circuit assembly (32) comprises a first magnetic component (323) and a second magnetic component (324), and the first magnetic component (323) and the second magnetic component (324) are arranged along the thickness direction of the speaker (30); the first magnetic component (323) comprises a first magnetic member (3231) and a second magnetic member (3232) that are spaced apart, and a third magnetic member (3233) and a fourth magnetic member (3234) that are spaced apart, wherein an arrangement direction of the first magnetic member (3231), the second magnetic member (3232), the third magnetic member (3233), and the fourth magnetic member (3234) is perpendicular to the thickness direction of the speaker (30), polarities of opposing ends of the first magnetic member (3231) and the second magnetic member (3232) are opposite, the first sub-magnetic gap (3201a) is formed between the first magnetic member (3231) and the second magnetic member (3232), polarities of opposing ends of the third magnetic member (3233) and the fourth magnetic member (3234) are opposite, and the second sub-magnetic gap (3202a) is formed between the third magnetic member (3233) and the fourth magnetic member (3234); and the second magnetic component (324) comprises a fifth magnetic member (3241) and a sixth magnetic member (3242) that are spaced apart, and a seventh magnetic member (3243) and an eighth magnetic member (3244) that are spaced apart, wherein an arrangement direction of the fifth magnetic member (3241), the sixth magnetic member (3242), the seventh magnetic member (3243), and the eighth magnetic member (3244) is perpendicular to the thickness direction of the speaker (30), polarities of opposing ends of the fifth magnetic member (3241) and the sixth magnetic member (3242) are opposite, the third sub-magnetic gap (3203b) is formed between the fifth magnetic member (3241) and the sixth magnetic member (3242), polarities of opposing ends of the seventh magnetic member (3243) and the eighth magnetic member (3244) are opposite, and the fourth sub-magnetic gap (3204b) is formed between the seventh magnetic member (3243) and the eighth magnetic member (3244).

10. The speaker (30) according to claim 8, wherein the magnetic circuit assembly (32) comprises a first magnet (3251), a second magnet (3252), a third magnet (3253), a first magnetic conductor (3281), a second magnetic conductor (3282), a third magnetic conductor (3283), a fourth magnetic conductor (3291), a fifth magnetic conductor (3292), and a sixth magnetic conductor (3293); the first magnet (3251), the second magnet (3252), and the third magnet (3253) are spaced apart, with an arrangement direction perpendicular to the thickness direction of the speaker (30), polarization directions of the first magnet (3251) and the second magnet (3252) are opposite and both are parallel to the thickness direction of the speaker (30), and polarization directions of the second magnet (3252) and the third magnet (3253) are opposite and both are parallel to the thickness direction of the speaker (30); the first magnetic conductor (3281) is fastened to one side that is of the first magnet (3251) and that faces toward the first diaphragm (331), the second magnetic conductor (3282) is fastened to one side that is of the second magnet (3252) and that faces toward the first diaphragm (331), the third magnetic conductor (3283) is fastened to one side that is of the third magnet (3253) and that faces toward the first diaphragm (331), the first sub-magnetic gap (3201a) is located between the first magnetic conductor (3281) and the second magnetic conductor (3282), and the second sub-magnetic gap (3202a) is located between the second magnetic conductor (3282) and the third magnetic conductor (3283); and the fourth magnetic conductor (3291) is fastened to one side that is of the first magnet (3251) and that faces toward the second diaphragm (332), the fifth magnetic conductor (3292) is fastened to one side that is of the second magnet (3252) and that faces toward the second diaphragm (332), the sixth magnetic conductor (3293) is fastened to one side that is of the third magnet (3253) and that faces toward the second diaphragm (332), the third sub-magnetic gap (3203b) is located between the fourth magnetic conductor (3291) and the fifth magnetic conductor (3292), and the fourth sub-magnetic gap (3204b) is located between the fifth magnetic conductor (3292) and the sixth magnetic conductor (3293).

11. The speaker (30) according to claim 8, wherein the speaker (30) further comprises a bracket (343), wherein the bracket (343) is located between the first sub-voice coil (34a) and the second sub-voice coil (34b) and fastened to the first sub-voice coil (34a) and the second sub-voice coil (34b).

12. The speaker (30) according to any one of claims 1 to 11, wherein the speaker (30) further comprises a first connector (361), the first connector (361) comprises a peripheral portion (3611) and a connection portion (3612), the connection portion (3612) is located on an inner side of the peripheral portion (3611) and connected to the peripheral portion (3611), the peripheral portion (3611) connects the housing (31) and the first diaphragm (331), and the connection portion (3612) connects the first diaphragm (331) and the voice coil (34).

13. The speaker (30) according to any one of claims 1 to 12, wherein the first diaphragm (331) and the second diaphragm (332) are symmetrically disposed with respect to the magnetic circuit assembly (32), and the first adjustment component (351) and the second adjustment component (352) are symmetrically disposed with respect to the magnetic circuit assembly (32).

14. The speaker (30) according to any one of claims 1 to 13, wherein there are a plurality of magnetic gaps (320), and the voice coil (34) is arranged or not arranged in the magnetic gap (320) aligned with the first adjustment component (351) and / or the second adjustment component (352).

15. A speaker (30), comprising: a housing (31) having an inner cavity (311); a magnetic circuit assembly (32), located in the inner cavity (311) and fastened to the housing (31), wherein the magnetic circuit assembly (32) is provided with a first magnetic gap (3205) and a second magnetic gap (3206) that are spaced apart, and an arrangement direction of the first magnetic gap (3205) and the second magnetic gap (3206) is parallel to a thickness direction of the speaker (30); a first diaphragm (331) and a second diaphragm (332), respectively located on two opposite sides of the magnetic circuit assembly (32), wherein a peripheral edge of the first diaphragm (331) and a peripheral edge of the second diaphragm (332) are both fastened to the housing (31); a voice coil (34), located between the first diaphragm (331) and the second diaphragm (332), wherein the voice coil (34) comprises a first portion (344) and a second portion (345) that are spaced apart, the first portion (344) and the second portion (345) are arranged in the thickness direction of the speaker (30), the first portion (344) is fastened to the first diaphragm (331) and at least partially located in the first magnetic gap (3205), and the second portion (345) is fastened to the second diaphragm (332) and at least partially located in the second magnetic gap (3206); and an adjustment component (35), located between the first portion (344) and the second portion (345) and fastened to the first portion (344) and the second portion (345), wherein the adjustment component (35) is further located between the first magnetic gap (3205) and the second magnetic gap (3206), and the adjustment component (35) is a magnetic member.

16. The speaker (30) according to claim 15, wherein a magnetic field direction of the first magnetic gap (3205) is opposite to a magnetic field direction of the second magnetic gap (3206), and a winding plane of the voice coil (34) is parallel to the thickness direction of the speaker (30).

17. The speaker (30) according to claim 16, wherein there are a plurality of voice coils (34), an arrangement direction of the plurality of voice coils (34) is parallel to a length direction of the speaker (30), the length direction of the speaker (30) is perpendicular to the thickness direction of the speaker (30), and the plurality of voice coils (34) are at least partially located in the same magnetic gap (320); or there are a plurality of magnetic gaps (320), the plurality of magnetic gaps (320) are spaced apart in a width direction of the speaker (30), the width direction of the speaker (30) is perpendicular to the thickness direction of the speaker (30), there are a plurality of voice coils (34), an arrangement direction of the plurality of voice coils (34) is parallel to the width direction of the speaker (30), and the plurality of voice coils (34) are at least partially located in the plurality of magnetic gaps (320) and correspond to the plurality of magnetic gaps (320) on a one-to-one basis.

18. The speaker (30) according to claim 15, wherein the first magnetic gap (3205) comprises a first sub-magnetic gap (3205a) and a second sub-magnetic gap (3205b) that are spaced apart, an arrangement direction of the first sub-magnetic gap (3205a) and the second sub-magnetic gap (3205b) is perpendicular to the thickness direction of the speaker (30), and a magnetic field direction of the first sub-magnetic gap (3205a) is opposite to a magnetic field direction of the second sub-magnetic gap (3205b); the second magnetic gap (3206) comprises a third sub-magnetic gap (3206a) and a fourth sub-magnetic gap (3206b) that are spaced apart, an arrangement direction of the third sub-magnetic gap (3206a) and the fourth sub-magnetic gap (3206b) is perpendicular to the thickness direction of the speaker (30), and a magnetic field direction of the third sub-magnetic gap (3206a) is opposite to a magnetic field direction of the fourth sub-magnetic gap (3206b); the first sub-magnetic gap (3205a) and the third sub-magnetic gap (3206a) are spaced apart, with an arrangement direction parallel to the thickness direction of the speaker (30), and the second sub-magnetic gap (3205b) and the fourth sub-magnetic gap (3206b) are spaced apart, with an arrangement direction parallel to the thickness direction of the speaker (30); and the first portion (344) is a first sub-voice coil, and the second portion (345) is a second sub-voice coil, wherein the first sub-voice coil comprises a first side portion (3441) and a second side portion (3442) that are opposite to each other, the first side portion (3441) is at least partially located in the first sub-magnetic gap (3205a), and the second side portion (3442) is at least partially located in the second sub-magnetic gap (3205b); and the second sub-voice coil comprises a third side portion (3451) and a fourth side portion (3452) that are opposite to each other, the third side portion (3451) is at least partially located in the third sub-magnetic gap (3206a), and the fourth side portion (3452) is at least partially located in the fourth sub-magnetic gap (3206b).

19. An electronic device, comprising a housing and the speaker (30) according to any one of claims 1 to 18, wherein the speaker (30) is mounted in the housing.

Images