Loudspeaker and electronic equipment

Abstract

The invention discloses a loudspeaker and electronic equipment, and belongs to the field of electronic equipment, in the loudspeaker, a first voice diaphragm comprises a body layer, an annular connecting part and a sinking layer, the body layer is provided with a mounting hole, a magnetic structure, a voice coil and the sinking layer are all arranged on the same side of the body layer, and the sinking layer is arranged opposite to the mounting hole. The sinking layer is connected with the body layer through an annular connecting part, the sinking layer and the annular connecting part define a mounting groove, the voice coil is connected with the body layer, the voice coil is used for being matched with the magnetic structure to drive the first voice diaphragm to vibrate at a first frequency band, and a vibration gap is formed between the sinking layer and the magnetic structure in the thickness direction of the sinking layer; the second voice diaphragm is connected to the mounting hole, the vibration driving mechanism is arranged in the mounting groove, the vibration driving mechanism can be used for driving the second voice diaphragm to generate vibration in a second frequency band, and the maximum frequency value of the second frequency band is larger than the maximum frequency value of the first frequency band.

Description

Technical Field

[0001] The present application belongs to the technical field of electronic equipment, and specifically relates to a speaker and an electronic device. Background Art

[0002] Speakers are important components in electronic devices such as mobile phones. Taking mobile phones as an example, due to the size design of electronic devices, the speaker holes can usually only be set at the bottom or top of the phone, so that the speakers can only sound from the side. This causes the speaker's frequency response to drop rapidly in the mid- and high-frequency parts, resulting in poor restoration of high-frequency sounds by the speakers, which has an adverse impact on the external sound effects of the electronic device and is not conducive to improving the user experience of the product. Summary of the Invention

[0003] The purpose of the embodiments of the present application is to provide a speaker and an electronic device to solve the problem that current electronic devices are affected by the location of the speaker's sound outlet, resulting in poor restoration of high-frequency sounds by the speaker, affecting the external sound effect of the electronic device.

[0004] In a first aspect, an embodiment of the present application discloses a loudspeaker comprising a magnetic structure, a voice coil, a first diaphragm, a second diaphragm, and a vibration drive structure, wherein: The first sound diaphragm includes a main body layer, an annular connecting portion and a sinking layer, the main body layer is provided with a mounting hole, the magnetic structure, the voice coil and the sinking layer are all arranged on the same side of the main body layer, the sinking layer is arranged opposite to the mounting hole, the sinking layer is connected to the main body layer through the annular connecting portion, and the sinking layer and the annular connecting portion form a mounting groove, the voice coil is connected to the main body layer, the voice coil is used to cooperate with the magnetic structure to drive the first sound diaphragm to vibrate in a first frequency band, and a vibration gap is provided between the sinking layer and the magnetic structure in the thickness direction of the sinking layer; The second sound membrane is connected to the mounting hole, and the vibration driving structure is arranged in the mounting groove. The vibration driving mechanism can be used to drive the second sound membrane to vibrate in a second frequency band, and the maximum frequency value of the second frequency band is greater than the maximum frequency value of the first frequency band.

[0005] In a second aspect, an embodiment of the present application discloses an electronic device, which includes a shell and the above-mentioned speaker, the shell includes a long side and a short side, the short side is provided with a sound hole, the speaker is installed in the shell, and the speaker is connected to the sound hole.

[0006] The embodiment of the present application discloses a loudspeaker, wherein the main body layer of the first sound diaphragm is provided with a mounting hole, and the magnetic structure, the voice coil, and the sinking layer of the first sound diaphragm are all arranged on the same side of the main body layer of the first sound diaphragm, the sinking layer is arranged opposite to the mounting hole, the sinking layer is connected to the main body layer by an annular connecting portion, and the sinking layer and the annular connecting portion form a mounting groove, and the voice coil is connected to the main body layer of the first sound diaphragm, so that when the voice coil is working and cooperates with the magnetic structure, the voice coil can drive the entire first sound diaphragm to vibrate in a first frequency band, so that the loudspeaker can achieve the purpose of operating in a relatively low frequency band. In the thickness direction of the sinking layer, that is, the overall vibration direction of the first sound diaphragm, a vibration gap is provided between the sinking layer and the magnetic structure, so that the bottom of the mounting groove on the first sound diaphragm can be spaced apart from the magnetic structure, ensuring that the first sound diaphragm does not contact the magnetic structure during vibration. At the same time, when the main body layer and the sinking layer jointly serve as the vibration structure of the first sound diaphragm, the area of ​​the first sound diaphragm's orthographic projection in a plane perpendicular to its own thickness direction is the same as the area of ​​the planar area surrounded by the outer edge of the first sound diaphragm. This can ensure that the vibration area of ​​the above structure will not be lost, and thus will not reduce the overall performance of the speaker in the above-mentioned first frequency band.

[0007] At the same time, the second sound diaphragm is connected to the mounting hole, so that the second sound diaphragm can form another sound cavity with the mounting groove. The vibration driving structure is arranged in the mounting groove, and the vibration driving structure can drive the second sound diaphragm to vibrate in a second frequency band. The maximum frequency value of the second frequency band is greater than the maximum frequency value of the first frequency band. This allows the speaker disclosed in the embodiment of the present application to operate in a relatively high frequency band, thereby improving the performance of the speaker in the high-frequency part, and solving the problem that the frequency response of the speaker in the high-frequency part decreases rapidly due to the sound outlet of the electronic device being set at the top or bottom, thereby making the overall external speaker effect of the electronic device relatively high and providing a better user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 A schematic diagram of a structure of a loudspeaker disclosed in an embodiment of the present application; Figure 2 for Figure 1 A schematic cross-sectional view of a portion of the structure of the loudspeaker is shown; Figure 3 and Figure 4 Both Figure 1 A schematic diagram of the working principle of the vibration drive mechanism in the loudspeaker shown; Figure 5 A schematic diagram of a portion of another structure of a loudspeaker disclosed in an embodiment of the present application; Figure 6 This is a schematic structural diagram of the first diaphragm and the second diaphragm in the loudspeaker disclosed in an embodiment of the present application.

[0009] Reference numerals: 101-magnetic bowl, 102-side magnet, 103-center magnet, 1031-first through hole, 104-magnetic plate, 1041-second through hole, 105-basin frame, 106-voice coil, 107-diaphragm fold, 108-first sound membrane, 1081-mounting hole, 1082-body layer, 1083-annular connection part, 1084-sinking layer, 201-driving magnet, 202-driving coil, 203-second diaphragm, 301-pad, 302-electrodeformable member. DETAILED DESCRIPTION

[0010] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0011] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0012] The embodiment of the present application discloses a speaker, which can be used in electronic devices such as mobile phones.

[0013] As mentioned above, due to the size constraints of current electronic devices, sound holes are typically only provided on the top or bottom surfaces of the device. These holes, in conjunction with the speakers, result in the speakers being forced to output sound signals sideways, resulting in poor high-frequency reproduction. Therefore, after careful research during the design process, the applicant determined that a tweeter could be added to compensate for the high-frequency loss of the current speakers.

[0014] Based on the above situation, the applicant has proposed, after research, that a separate tweeter speaker, independent of the current speaker, could be customized to enhance the high-frequency sound quality of the electronic device. However, adopting the aforementioned technical solution would place higher demands on the arrangement and stacking of components within the electronic device. Based on the current internal design of the electronic device, the newly added tweeter speaker would occupy additional installation space within the electronic device, further increasing the stacking requirements for components within the electronic device, making its design and implementation relatively difficult.

[0015] To this end, the applicant, after further research, proposed the speaker for which protection is sought in the embodiment of this application, such as Figures 1-6 As shown, the loudspeaker includes a magnetic structure, a voice coil 106, a first diaphragm 108, a second diaphragm 203 and a vibration drive structure. Of course, the loudspeaker may also include other components such as a basin frame 105. Considering the simplicity of the text, this article will not provide a detailed introduction here.

[0016] The magnetic structure is used to provide a magnetic field, and can specifically be a permanent magnet or an electromagnet. To minimize energy consumption and control difficulty of the electronic device, in one embodiment of the present application, the magnetic structure includes a permanent magnet. The voice coil 106 includes a conductive coil, that is, the voice coil 106 is essentially an electromagnet. By arranging the voice coil 106 at a corresponding position in the magnetic field of the magnetic structure, the voice coil 106 can generate an attraction or repulsion effect with the magnetic structure when currents of different directions are passed through it, thereby driving the first diaphragm 108 to vibrate back and forth to generate a sound signal.

[0017] In order to ensure that the speaker disclosed in the embodiment of the present application can generate sound signals of different frequency bands without occupying additional installation space, in the speaker disclosed in the embodiment of the present application, Figure 2 As shown, the first sound membrane 108 includes a main body layer 1082, an annular connecting portion 1083 and a sinking layer 1084, wherein the main body layer 1082 and the sinking layer 1084 are both membrane structures, and the magnetic structure, the voice coil 106 and the sinking layer 1084 are all arranged on the same side of the main body layer 1082, the main body layer 1082 is provided with a mounting hole 1081, the sinking layer 1084 is arranged opposite to the mounting hole 1081, and the sinking layer 1084 is connected to the main body layer 1082 through the annular connecting portion 1083, so that the sinking layer 1084 can form a mounting groove with the annular connecting portion 1083.

[0018] Intuitively speaking, in the embodiment of the present application, the area essentially covered by the sinking layer 1084 and the main body layer 1082 is still equal to the covering area of ​​the main body layer 1082 without the mounting hole 1081 formed therein. By making the first sound membrane 108 adopt the above-mentioned structural form, the vibration area of ​​the positive projection of the first sound membrane 108 of the above-mentioned structure does not decrease compared to the membrane structure with the same appearance but a complete planar structure as a whole. Therefore, while ensuring that the vibration area of ​​the first sound membrane 108 will not decrease, and thus will not cause the performance of the speaker in the first frequency band to be lost, the first sound membrane 108 can create an installation space for a device that provides sound-generating effect in the high-frequency part, namely the above-mentioned mounting groove. Of course, in the process of forming the installation groove, it is still necessary to ensure that the bottom of the installation groove, that is, the sinking layer 1084 can be spaced apart from the magnetic structure. That is, in the embodiment of the present application, in the thickness direction of the sinking layer 1084, a vibration gap needs to be provided between the sinking layer 1084 and the magnetic structure to prevent the first sound membrane 108 from contacting the magnetic structure during the vibration process, thereby hindering the vibration process of the first sound membrane 108.

[0019] Specifically, the size of the vibration gap can be flexibly selected based on parameters such as the amplitude of the first diaphragm 108, which is not limited herein. Similarly, parameters such as the shape and size of the mounting hole 1081 can also be flexibly selected based on actual needs. Furthermore, during the formation of the first diaphragm 108, the main body layer 1082, the annular connecting portion 1083, and the sinking layer 1084 can be formed separately by separate molding. Subsequently, the sinking layer 1084 is connected to the main body layer 1082 using the annular connecting portion 1083, and the sinking layer 1084 is aligned with the mounting hole 1081 of the main body layer 1082, thereby forming a mounting groove using the sinking layer 1084 and the annular connecting portion 1083. In another embodiment of the present application, the first sound diaphragm 108 is an alloy structural part, that is, the first sound diaphragm 108 is formed of an alloy material. In this case, the main body layer 1082, the annular connecting part 1083 and the sinking layer 1084 can be integrally formed, that is, the first sound diaphragm 108 including the main body layer 1082, the annular connecting part 1083 and the sinking layer 1084 is formed by an integral molding method, which can further improve the modulus of the first sound diaphragm 108 to improve the installation stability of the vibration drive structure.

[0020] Based on the first diaphragm 108 having the above-described structure, during the speaker assembly process, the voice coil 106 is connected to the body layer 1082, thereby enabling the voice coil 106 to cooperate with the magnetic structure and drive the body layer 1082 and the entire first diaphragm 108 to vibrate. It should be noted that by setting parameters such as the structure of components such as the voice coil 106 and the first diaphragm 108 or the input signal, the voice coil 106 can be used to drive the first diaphragm 108 to vibrate within a first frequency band. The first frequency band typically includes a low frequency band. Of course, in other embodiments of the present application, the first frequency band may also include a mid-frequency band, which is not limited herein.

[0021] At the same time, the second diaphragm 203 is connected to the mounting hole, allowing the mounting slot of the first diaphragm 108 to form another sound cavity with the second diaphragm 203. By placing the vibration drive structure within the mounting slot, the vibration drive structure is able to drive the second diaphragm 203 to vibrate when power is applied. Accordingly, by configuring the components of the second diaphragm 203 and the vibration drive structure, as well as the input signal parameters, the vibration drive structure is able to drive the second diaphragm 203 to vibrate at a second frequency band. Of course, during assembly, the vibration drive structure and the second diaphragm 203 must be in contact with each other to ensure that the vibration drive structure can drive the second diaphragm 203 to vibrate when vibrating. Furthermore, the maximum frequency of the second frequency band is greater than the maximum frequency of the first frequency band, allowing the second diaphragm 203 to emit sound signals with a higher frequency than the first diaphragm 108. This, in turn, complements the high-frequency portion of the speaker, improving the overall performance of the speaker and resulting in a relatively better sound quality for the electronic device. Specifically, the second frequency band may be a high frequency band, and more specifically, the second frequency band may be a specific frequency band around 10 kHz.

[0022] An embodiment of the present application discloses a loudspeaker, in which a main body layer 1082 of the first sound diaphragm 108 is provided with a mounting hole 1081, and the magnetic structure, the voice coil 106 and the sinking layer 1084 of the first sound diaphragm are all arranged on the same side of the main body layer 1082 of the first sound diaphragm 108, the sinking layer 1084 is arranged opposite to the mounting hole 1081, the sinking layer 1084 is connected to the main body through an annular connecting portion 1083, and the sinking layer 1084 and the annular connecting portion 1083 form a mounting groove, the voice coil 106 is connected to the main body 1082 of the first sound diaphragm 108, so that when the voice coil 106 works and cooperates with the magnetic structure, the voice coil 106 can drive the entire first sound diaphragm 108 to vibrate in the first frequency band, so that the loudspeaker can achieve the purpose of working in a relatively low frequency band. In the thickness direction of the sinking layer 1084, that is, in the overall vibration direction of the first diaphragm 108, a vibration gap is provided between the sinking layer 1084 and the magnetic structure. This allows the bottom of the mounting groove on the first diaphragm 108 to be spaced apart from the magnetic structure, ensuring that the first diaphragm 108 does not come into contact with the magnetic structure during vibration. Furthermore, when the main body layer 1082 and the sinking layer 1084 jointly serve as the vibration structure of the first diaphragm 108, the area of ​​the orthographic projection of the first diaphragm 108 in a plane perpendicular to its thickness direction is equal to the area of ​​the planar region enclosed by the outer edge of the first diaphragm 108. This ensures that the vibration area of ​​the aforementioned structure is not lost, thereby preventing degradation of the overall performance of the speaker in the aforementioned first frequency band.

[0023] At the same time, the second sound membrane 203 is connected to the mounting hole, so that the second sound membrane 203 can form another sound cavity with the mounting groove. The vibration driving structure is arranged in the mounting groove, and the vibration driving structure can drive the second sound membrane 203 to vibrate in a second frequency band. The maximum frequency value of the second frequency band is greater than the maximum frequency value of the first frequency band. This allows the speaker disclosed in the embodiment of the present application to operate in a relatively high frequency band, thereby improving the performance of the speaker in the high-frequency part, and solving the problem that the frequency response of the speaker in the high-frequency part decreases rapidly due to the sound outlet of the electronic device being set at the top or bottom, thereby making the overall external speaker effect of the electronic device relatively high and providing a better user experience.

[0024] As described above, the first sound diaphragm 108 is provided with a mounting groove, and the mounting groove is recessed toward the side close to the magnetic structure. In order to prevent the sinking layer 1084 provided to form the mounting groove from affecting the vibration amplitude of the entire first sound diaphragm 108, the mounting hole 1081 can be provided in the edge area of ​​the main body layer 1082 where the vibration amplitude is relatively small, so as to ensure that the effective size of the vibration gap between the sinking layer 1084 and the magnetic structure is relatively larger.

[0025] In another embodiment of the present application, in order to improve the overall sound effect of the speaker, the mounting hole 1081 can be centered relative to the main body layer 1082. Based on this, in order to prevent the sinking layer 1084 from interfering with the vibration range of the first diaphragm 108, in a specific embodiment of the present application, the magnetic structure can be provided with a avoidance structure, and the avoidance structure and the sinking layer 1084 can be arranged relative to each other in the thickness direction of the first diaphragm 108. The avoidance arrangement of the avoidance structure and the sinking layer 1084 can be used to prevent the presence of the sinking layer 1084 from causing a reduction in the vibration amplitude of the first diaphragm 108, or causing the first diaphragm 108 to collide with the magnetic structure during vibration.

[0026] Of course, in order to ensure that the avoidance structure can avoid the sinking layer 1084 as a whole, in the direction perpendicular to the thickness direction of the first sound membrane 108, it is necessary to make the size of the corresponding direction of the sinking layer 1084 slightly smaller than the size of the corresponding direction in the avoidance structure. Intuitively speaking, taking the sinking layer as a rectangular structure as an example, the orientations of the adjacent two side edges in the sinking layer 1084 can be respectively the width direction and the length direction, wherein the aforementioned length direction and width direction are perpendicular to each other, and both are perpendicular to the thickness direction of the first sound membrane 108. Based on this, in the process of designing the avoidance structure, the avoidance structure can also be a rectangular recessed structure or a through structure. By making the length of the avoidance structure slightly larger than the length of the sinking layer 1084, and making the width of the avoidance structure slightly larger than the width of the sinking layer 1084, it can be ensured that the sinking layer 1084 of the first sound membrane 108 can be integrally embedded in the avoidance structure of the magnetic structure, so that the avoidance structure can normally provide an avoidance effect for the sinking layer 1084.

[0027] Of course, in order to maximize the prevention of contact between the sinking layer 1084 and the inner wall of the avoidance structure, within a certain size range, the difference between the length and width dimensions of the avoidance structure and the length and width dimensions of the sinking layer 1084 can be made relatively larger. It should be noted that for current speakers, in a plane perpendicular to the thickness direction of the diaphragm, the area of ​​the diaphragm is generally larger than the area of ​​the magnetic structure. Therefore, even if the magnetic structure loses part of its structure due to the provision of the avoidance structure in the embodiment of the present application, it will basically not have a substantial impact on the magnetic field strength and distribution of the magnetic structure. Furthermore, when the avoidance structure is provided on the magnetic structure, the coordination relationship between the voice coil 106 and the magnetic structure can still be maintained.

[0028] As described above, the magnetic structure may include a permanent magnet, and considering that the general shape of the speaker is a rectangular cube, in this case, in order to enhance the magnetic field effect of the magnetic structure disclosed in the embodiment of the present application, the magnetic structure may include a central magnet 103 and a plurality of side magnets 102, the central magnet 103 being a cubic structure, and the plurality of side magnets 102 being respectively arranged outside the four sides of the central magnet 103 to supplement the magnetic field generated by the central magnet 103. On this basis, the central magnet 103 is arranged directly opposite the central area of ​​the first sound membrane 108, and as described above, the mounting hole and the sinking layer 1084 may be centered relative to the main body layer 1082 of the first sound membrane 108. For this reason, in the embodiment of the present application, the above-mentioned avoidance structure may be provided on the central magnet 103, and the avoidance structure and the sinking layer 1084 may be utilized to avoid the setting.

[0029] Of course, in order to form a more stable relative fixed relationship between the central magnet 103 and the multiple side magnets 102, in the embodiment of the present application, the magnetic structure may also include a magnetic bowl 101. The magnetic bowl 101 may be formed of non-magnetic material so that it can mainly serve as the installation basis for the central magnet 103 and the side magnets 102. Of course, in other embodiments of the present application, the material of the magnetic bowl 101 can also be flexibly adjusted according to actual needs to further improve parameters such as the stability of the magnetic field.

[0030] Specifically, influenced by parameters such as the initial spacing between the sinking layer 1084 of the first diaphragm 108 and the central magnet 103 in the thickness direction of the first diaphragm 108, in a specific embodiment of the present application, the central magnet 103 may be provided with an escape groove. The escape groove is formed by being recessed from the surface of the central magnet 103 facing the main body layer 1082, and the escape groove and the sinking layer 1084 are arranged to avoid each other. That is, in this embodiment of the present application, the escape groove provided on the central magnet 103 has a groove bottom and does not penetrate the central magnet 103. Of course, the depth of the escape groove can be flexibly selected based on parameters such as the vibration amplitude of the first diaphragm 108.

[0031] In order to further prevent the sinking layer 1084 of the first sound membrane 108 from contacting the central magnet 103 during the vibration of the first sound membrane 108, in another embodiment of the present application, the central magnet 103 is provided with a first through hole 1031. Obviously, the first through hole 1031 is arranged to pass through the central magnet 103 along the thickness direction of the first sound membrane 108. In this case, the first through hole 1031 and the sinking layer 1084 are arranged to avoid each other. In this case, when the sinking layer 1084 vibrates with the main body layer 1082, it can basically prevent the sinking layer 1084 from contacting the central magnet 103 of the magnetic structure, which will hinder the vibration process of the first sound membrane 108.

[0032] Of course, no matter whether an avoidance groove is set on the central magnet 103 or a first through hole 1031 is set on the central magnet 103, it is still necessary to ensure that the size of the avoidance groove or the first through hole 1031 is larger than or slightly larger than the size of the sinking layer 1084 in the corresponding direction perpendicular to the thickness direction of the first sound membrane 108, so as to ensure that the avoidance groove and the first through hole 1031 both have the ability to avoid the sinking layer 1084.

[0033] In order to further improve the stability and other parameters of the magnetic field generated by the magnetic structure, in another embodiment of the present application, the magnetic structure may further include a magnetic conductive plate 104, and the magnetic conductive plate 104 is sandwiched between the central magnet 103 and the first sound membrane 108, so as to utilize the magnetic conductive plate 104 to re-plan the distribution of the magnetic field generated by the central magnet 103 and other magnetic components, thereby improving the overall magnetic effect of the magnetic structure. In the case where the magnetic structure includes the magnetic conductive plate 104, and the magnetic conductive plate 104 is sandwiched between the first sound membrane 108 and the central magnet 103, in order to ensure that the magnetic conductive plate 104 does not hinder the vibration process of the sinking layer 1084, a second through hole 1041 is provided on the magnetic conductive plate 104, so as to utilize the second through hole 1041 and the sinking layer 1084 to avoid the arrangement.

[0034] In one specific embodiment of the present application, the shape and size of the second through hole 1041 can be different from the shape and size of the avoidance groove (or the first through hole 1031) on the central magnet 103. To reduce the difficulty of manufacturing the magnetic conductive member and the central magnet 103 and to minimize the loss of magnetic field strength of the magnetic structure, in another embodiment of the present application, the shape of the second through hole 1041 can be the same as the shape of the avoidance groove (or the first through hole 1031), and the size of the second through hole 1041 can be the same or substantially the same as the size of the avoidance groove (or the first through hole 1031) in the direction perpendicular to the thickness of the first diaphragm 108.

[0035] As described above, the shapes of the sinking layer 1084 and the mounting slot can be flexibly selected based on actual needs. In one specific embodiment of the present application, the first diaphragm 108, the mounting hole 1081, and the second diaphragm 203 can all be generally rectangular structures. This ensures that the sound effects of the first diaphragm 108 and the second diaphragm 203 are relatively good, further enhancing the overall sound quality of the speaker. Accordingly, when the magnetic structure includes the magnetic conductive plate 104 and the central magnet 103, the second through-hole 1041 and the avoidance sink (or the first through-hole 1031) can also be generally rectangular in shape.

[0036] In addition, the second sound diaphragm 203 is connected to the mounting hole of the first sound diaphragm 108. For this reason, the arrangement of the second sound diaphragm 203 and the vibration drive structure may cause certain interference to the vibration process of the first sound diaphragm 108. Furthermore, while ensuring that the performance of the speaker in the second frequency band can basically meet the requirements, in order to minimize the degree of interference caused by the arrangement of the second sound diaphragm 203 and the vibration drive structure to the first sound diaphragm 108, in an embodiment of the present application, the area of ​​the projection of the second sound diaphragm 203 in a plane perpendicular to the thickness direction of the first sound diaphragm 108 is between 6% and 10% of the area of ​​the projection of the first sound diaphragm 108 in the aforementioned plane.

[0037] In a specific embodiment of the present application, taking a speaker with a length and width of 15 mm and 11 mm as an example, in order to improve the performance of the speaker around 10 kHz, that is, in the second frequency band, the area of ​​the projection of the second sound membrane 203 in the aforementioned plane can be made about 10 mm², and the area of ​​the projection of the first sound membrane 108 in the aforementioned plane can be made about 130 mm², and as Figure 6 As shown, the second diaphragm 203 is arranged at the mounting hole of the first diaphragm 108 .

[0038] As described above, the vibration drive structure is arranged in the installation groove and is located on the side of the second sound membrane 203 facing the magnetic structure. Although the overall weight of the vibration drive structure and the second sound membrane 203 is relatively small, in order to further reduce the interference of the two on the normal operation of the first sound membrane 108, in a specific embodiment of the present application, as described above, the first sound membrane 108 can be an alloy structural part, which can further improve the modulus of the first sound membrane 108, so that the reliability of the first sound membrane 108 installed with the second sound membrane 203 and the vibration drive structure is further improved.

[0039] Of course, considering the relatively large overall size of the first diaphragm 108, in a specific embodiment of the present application, in order to reduce the difficulty of processing the first diaphragm 108, the first diaphragm 108 can include a dome, which includes the above-mentioned body layer 1082, the annular connecting portion 1083, and the sinking layer 1084. The outer edge of the dome is further provided with a diaphragm surround 107. The dome and the diaphragm surround 107 are formed separately. During the assembly process of the speaker, the dome and the diaphragm surround 107 are connected to each other, and the dome is connected to the basin frame 105 and other components via the diaphragm surround 107. As for the second diaphragm 203, since its overall size is relatively small, the second diaphragm 203 can include an integrally designed surround and dome.

[0040] Optionally, the driving mode of the vibration driving structure is the same as the driving mode of the first sound membrane 108, that is, the current flowing into the electromagnet is changed in a different way to change the direction of action between the electromagnet and another magnet, thereby achieving the purpose of driving the second sound membrane 203 to vibrate. Based on this, the vibration driving structure can include a driving coil 202 and a driving magnet 201. On this basis, as Figure 3 and Figure 4 As shown, the driving magnet 201 can generate a corresponding magnetic field, so that when the driving coil 202 is energized, the magnetic fields generated by the driving coil 202 and the driving magnet 201 interact with each other, and the driving coil 202 and the driving magnet 201 produce a movement form of mutual repulsion or mutual attraction; at the same time, by connecting one of the driving coil 202 and the driving magnet 201 to the second sound membrane 203 and the other to the sinking layer 1084, the interaction between the driving coil 202 and the driving magnet 201 can drive the second sound membrane 203 to vibrate relative to the sinking layer 1084, and then the second sound membrane 203 emits sound waves of the second frequency band.

[0041] Of course, the driving magnet 201 may also include a coil. In another embodiment of the present application, to reduce power consumption and improve magnetic field stability, the driving magnet 201 includes a permanent magnet. In this case, the composite magnetic field generated by the driving magnet 201 and the magnetic structure can be designed and adjusted according to actual conditions to ensure that the two do not interfere with each other and hinder the normal vibration of the first diaphragm 108 and the second diaphragm 203. In addition, when the driving magnet 201 includes a permanent magnet, considering that the weight of the permanent magnet is generally greater than that of the driving coil 202, and further, to reduce the load on the second diaphragm 203, in this embodiment of the present application, the driving coil 202 can be connected to the second diaphragm 203, and the driving magnet 201 can be connected to the sinking layer 1084. More specifically, the driving coil 202 and the second diaphragm 203 can be fixedly connected by bonding, and the driving magnet 201 and the first diaphragm 108 can be fixedly connected.

[0042] Taking into account that the magnetic field generated by the driving magnet 201 is distributed in a range, it is not necessary for the driving coil 202 and the driving magnet 201 to be directly opposite each other in the thickness direction of the second sound membrane 203. In this case, the driving coil 202 and the driving magnet 201 can be staggered so that the one of the driving coil 202 and the driving magnet 201 connected to the second sound membrane 203 is spaced apart from the sinking layer 1084, and the one connected to the sinking layer 1084 is spaced apart from the second sound membrane 203, thereby ensuring that the second sound membrane 203 has a relatively larger vibration space.

[0043] To further enhance the interaction between the drive coil 202 and the drive magnet 201, in another embodiment of the present application, the drive coil 202 and the drive magnet 201 may be disposed opposite each other in the thickness direction of the second diaphragm 203. Furthermore, the drive coil 202 and the drive magnet 201 may be disposed directly opposite each other in the thickness direction of the second diaphragm 203. Of course, in this embodiment of the present application, to ensure that the second diaphragm 203 can still vibrate normally, during the design and assembly process, the drive coil 202 and the drive magnet 201 need to be spaced apart in the thickness direction of the second diaphragm 203 to reserve sufficient space for the vibration of the second diaphragm 203.

[0044] As described above, the vibration driving structure may include a driving coil 202 and a driving magnet 201. In other embodiments of the present application, such as Figure 5 As shown, the vibration driving structure may include an electrodeformable element 302, and the electrodeformable element 302 may be connected to the second diaphragm 203, so that the electrodeformable element 302 can drive the second diaphragm 203 to vibrate in the second frequency band when powered.

[0045] Specifically, the electrodeformable element 302 can be formed of a piezoelectric material such as piezoelectric ceramics. When current is applied to the electrodeformable element 302, the central portion of the electrodeformable element 302 can warp in a direction corresponding to the direction of the current. In this case, by alternately controlling the direction of the current flowing into the electrodeformable element 302, the electrodeformable element 302 can be warped in opposite directions, thereby driving the vibration of the second diaphragm 203. In another embodiment of the present application, the electrodeformable element 302 can also be formed of a memory alloy material. The memory alloy can also change its shape when current is applied, thereby changing the distance between the second diaphragm 203 and the sinking layer 1084.

[0046] In order to further enhance the effect of transmitting the warping action or deformation action of the electrodeformer 302 to the second sound membrane 203, in a specific embodiment of the present application, along the thickness direction of the second sound membrane 203, one side surface of the electrodeformer 302 can be connected to the second sound membrane 203, and the other side surface of the electrodeformer 302 can be connected to the sinking layer 1084, so that the electrodeformer 302 can be supported as a whole between the sinking layer 1084 of the first sound membrane 108 and the second sound membrane 203, which can make the effect of the electrodeformer 302 on the second sound membrane 203 relatively better.

[0047] Taking into account that the overall size of the second sound membrane 203 is relatively small, and the density of the electrodeformer 302 is relatively large due to the influence of the material, and further, in order to prevent the larger size and relatively large weight of the electrodeformer 302 from adversely affecting the structural stability and vibration reliability of the first sound membrane 108, in another embodiment of the present application, the electrodeformer 302 can be spaced apart from the sinking layer 1084 in the thickness direction of the second sound membrane 203. In this case, the size and weight of the electrodeformer 302 are relatively small.

[0048] At the same time, in order to ensure that the effect of the electrodeformer 302 on the second sound membrane 203 is still relatively good, in the embodiment of the present application, the vibration driving structure can also include a pad 301, and the pad 301 is clamped between the electrodeformer 302 and the sinking layer 1084, so that the effect of the electrodeformer 302 can still be better transmitted to the second sound membrane 203.

[0049] In one specific embodiment of the present application, the density of the spacer 301 can be made relatively low, which can significantly reduce the weight of the entire vibration drive structure and prevent the vibration drive structure from significantly adversely affecting the vibration reliability and structural stability of the first diaphragm 108. In another embodiment of the present application, in a direction perpendicular to the warping direction of the electrodeformable element 302, that is, in the distribution direction of the two sides of the electrodeformable element 302 where warping is essentially non-existent, the size of the spacer 301 is smaller than the size of the electrodeformable element 302, and the spacer 301 is centrally located relative to the electrodeformable element 302 in the aforementioned direction. This can enhance the effect of the electrodeformable element 302 on the second diaphragm 203. Of course, in yet another embodiment of the present application, the technical solutions mentioned in the above two embodiments can also be adopted simultaneously to balance the vibration effect of the second diaphragm 203 and the structural stability and vibration reliability of the first diaphragm 108.

[0050] Based on the loudspeaker disclosed in any of the above embodiments, the embodiments of the present application also disclose an electronic device, which includes a housing and any of the above speakers. The housing includes long sides and short sides. As the name implies, influenced by the design factor that the current electronic devices are usually rectangular in shape, the outer side of the electronic device usually includes two relatively large and relatively arranged long sides, and two relatively small and relatively arranged short sides, wherein, influenced by the usage habits of the electronic device, the long sides are usually referred to as the left side and the right side, and the short sides are usually referred to as the top side and the bottom side. In the electronic device disclosed in the embodiments of the present application, a sound hole is provided on the end side, the loudspeaker is mounted on the housing, and the loudspeaker is connected to the sound hole. Of course, the electronic device also includes other components such as batteries. Considering the brevity of the text, they will not be introduced one by one here.

[0051] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0052] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A loudspeaker, characterized in that: It includes a magnetic structure, a voice coil, a first sound membrane, a second sound membrane and a vibration driving structure, wherein: The first sound membrane includes a body layer, an annular connecting portion and a sinking layer, the body layer is provided with a mounting hole, the magnetic structure, the voice coil and the sinking layer are all arranged on the same side of the body layer, the sinking layer is arranged opposite to the mounting hole, the sinking layer is connected to the body layer through the annular connecting portion, and the sinking layer and the annular connecting portion form a mounting groove, the voice coil is connected to the body layer, the voice coil is used to cooperate with the magnetic structure to drive the first sound membrane to vibrate in a first frequency band, and in the thickness direction of the sinking layer, a vibration gap is provided between the sinking layer and the magnetic structure; The second sound membrane is connected to the mounting hole, and the vibration driving structure is arranged in the mounting groove. The vibration driving mechanism can be used to drive the second sound membrane to vibrate in a second frequency band, and the maximum frequency value of the second frequency band is greater than the maximum frequency value of the first frequency band.

2. The loudspeaker according to claim 1, characterized in that The magnetic structure comprises a central magnet, the central magnet is provided with an avoidance sinking groove, the avoidance sinking groove is formed by being recessed from the central magnet toward the surface of the main body layer, and the avoidance sinking groove and the sinking layer are arranged in an avoidance manner.

3. The loudspeaker according to claim 1, characterized in that The magnetic structure comprises a central magnet, the central magnet is provided with a first through hole, and the first through hole and the sinking layer are arranged to avoid each other.

4. The loudspeaker according to claim 2 or 3, characterized in that: The magnetic structure also includes a magnetic conductive plate, which is sandwiched between the central magnet and the first sound membrane. The magnetic conductive plate is provided with a second through hole, and the second through hole is arranged to avoid the sinking layer.

5. The loudspeaker according to claim 1, characterized in that The vibration driving structure includes a driving coil and a driving magnet, one of which is connected to the second sound membrane, and the other is connected to the sinking layer.

6. The loudspeaker according to claim 5, characterized in that The driving coil and the driving magnet are disposed opposite to each other and spaced apart in the thickness direction of the second diaphragm.

7. The loudspeaker according to claim 1, characterized in that The vibration driving structure includes an electrodeformable element, which is connected to the second sound membrane. When powered, the electrodeformable element is used to drive the second sound membrane to vibrate in a second frequency band.

8. The loudspeaker according to claim 7, characterized in that In the thickness direction of the second sound membrane, the electrodeformable element is spaced apart from the sinking layer; The vibration driving structure further includes a pad block, which is sandwiched between the electrodeformable element and the sinking layer.

9. The loudspeaker according to claim 1, characterized in that The first sound membrane is an alloy structural part, and the main body layer, the annular connecting part and the sinking layer are integrally formed.

10. An electronic device, characterized in that: It comprises a shell and the speaker according to any one of claims 1 to 9, wherein the shell comprises a long side and a short side, the short side is provided with a sound outlet, the speaker is mounted on the shell, and the speaker is connected to the sound outlet.

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