Loudspeaker and electronic device

Abstract

The present application relates to the field of electronic devices, and discloses a loudspeaker and an electronic device. In the loudspeaker, a first voice diaphragm comprises a body layer, an annular connecting portion, and a sunken layer; a mounting hole is formed in the body layer; a magnetic structure, a voice coil, and the sunken layer are all arranged on the same side of the body layer; the sunken layer is arranged opposite to the mounting hole; the sunken layer is connected to the body layer by means of the annular connecting portion; the sunken layer and the annular connecting portion define a mounting slot; the voice coil is connected to the body layer; the voice coil is configured to work in conjunction with the magnetic structure so as to drive the first voice diaphragm to vibrate at a first frequency band; in the thickness direction of the sunken layer, a vibration gap is present between the sunken layer and the magnetic structure; a second voice diaphragm is connected to the mounting hole; a vibration driving structure is provided in the mounting slot; the vibration driving mechanism can be configured to drive the second voice diaphragm to vibrate at 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.

Description

Speaker and electronic device

[0001] Cross-reference to related applications

[0002] The present application claims priority to the Chinese patent application No. 202411357920.9, filed on September 27, 2024, and entitled "Speaker and electronic device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application belongs to the technical field of electronic devices, and specifically relates to a speaker and an electronic device. BACKGROUND

[0004] The speaker is an important device in electronic devices such as mobile phones. For example, due to the size design of the electronic device, the sound outlet hole of the speaker can usually only be arranged at the bottom or top of the mobile phone, so that the speaker can only adopt a side sound emitting mode to emit sound, which causes the frequency response of the speaker to decrease rapidly in the medium and high frequency parts, thereby causing the speaker to have poor restoration of high frequency sound and adversely affecting the sound effect of the electronic device, which is not conducive to improving the user experience of the product. SUMMARY

[0005] The purpose of the embodiments of the present application is to provide a speaker and an electronic device to solve the problem that the current electronic device is affected by the opening position of the sound outlet hole of the speaker, causing the speaker to have poor restoration of high frequency sound and affecting the sound effect of the electronic device.

[0006] In a first aspect, the embodiments of the present application disclose a speaker, comprising a magnetic structure, a voice coil, a first diaphragm, a second diaphragm and a vibration driving structure, wherein,

[0007] The first diaphragm comprises a body layer, a ring-shaped connecting portion and a sunken layer, the body layer is provided with a mounting hole, the magnetic structure, the voice coil and the sunken layer are arranged on the same side of the body layer, the sunken layer is arranged opposite to the mounting hole, the sunken layer is connected to the body layer through the ring-shaped connecting portion, and the sunken layer and the ring-shaped connecting portion enclose 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 diaphragm to vibrate in a first frequency band, and a vibration gap is arranged between the sunken layer and the magnetic structure in the thickness direction of the sunken layer;

[0008] The second diaphragm is connected to the mounting hole, and the vibration driving structure is arranged in the mounting groove, the vibration driving structure can be used to drive the second diaphragm 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.

[0009] In a second aspect, the embodiments of the present application disclose an electronic device, which comprises a shell and the loudspeaker, the shell comprises a long side and a short side, the short side is provided with a sound hole, the loudspeaker is mounted on the shell, and the loudspeaker is in communication with the sound hole.

[0010] The embodiments of the present application disclose a loudspeaker, in a first diaphragm, a body layer is provided with a mounting hole, and a magnetic structure, a voice coil and a sunken layer of the first diaphragm are all arranged on the same side of the body layer of the first diaphragm, the sunken layer is arranged opposite to the mounting hole, the sunken layer is connected with the body layer through an annular connecting part, and the sunken layer and the annular connecting part enclose a mounting groove, the voice coil is connected with the body layer of the first diaphragm, so that the voice coil can drive the entire first diaphragm to vibrate in a first frequency band under the condition that the voice coil works and cooperates with the magnetic structure, and the loudspeaker can work in a relatively low frequency band. Wherein, a vibration gap is arranged between the sunken layer and the magnetic structure in the thickness direction of the sunken layer, that is, in the overall vibration direction of the first diaphragm, so that the groove bottom of the mounting groove on the first diaphragm can be arranged spaced apart from the magnetic structure, and it is ensured that the first diaphragm will not contact the magnetic structure in the process of vibration. Meanwhile, in the case that the body layer and the sunken layer jointly serve as a vibration structure of the first diaphragm, the area of the normal projection of the first diaphragm in the plane perpendicular to the thickness direction of the first diaphragm is the same as the area of the plane region enclosed by the outer edge of the first diaphragm, which can ensure that the vibration area of the above structure will not be lost, and thus the overall performance of the loudspeaker in the above first frequency band will not be reduced.

[0011] Meanwhile, the second diaphragm is connected to the mounting hole, so that the second 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 diaphragm 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, which makes the loudspeaker disclosed by the embodiments of the present application also work in a relatively high frequency band, so as to improve the performance of the loudspeaker in the high frequency part, solve the problem that the frequency response of the loudspeaker in the high frequency part decreases rapidly due to the sound hole of the electronic device arranged at the top or the bottom, and thus the overall sound output effect of the electronic device is relatively high, and the user experience is good. BRIEF DESCRIPTION OF DRAWINGS

[0012] The accompanying drawings, which are included to provide a further understanding of the present application, constitute a part of the present application, the schematic embodiments of the present application and the description thereof serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0013] FIG. 1 is a schematic view of a structure of a loudspeaker disclosed by the embodiments of the present application;

[0014] FIG. 2 is a sectional view of part of the structure of the loudspeaker shown in FIG. 1;

[0015] Fig. 3 and Fig. 4 are schematic diagrams of the working principle of the vibration driving mechanism in the loudspeaker shown in Fig. 1;

[0016] Fig. 5 is a schematic diagram of part of the structure of another structure of the loudspeaker disclosed in the embodiments of the present application;

[0017] Fig. 6 is a schematic diagram of the structure of the first diaphragm and the second diaphragm in the loudspeaker disclosed in the embodiments of the present application.

[0018] Reference signs: 101 - magnetic bowl, 102 - side magnet, 103 - center magnet, 1031 - first through hole, 104 - magnetic conducting plate, 1041 - second through hole, 105 - pot rack, 106 - voice coil, 107 - diaphragm folding ring, 108 - first diaphragm, 1081 - mounting hole, 1082 - body layer, 1083 - annular connecting part, 1084 - sunken layer, 201 - driving magnet, 202 - driving coil, 203 - second diaphragm, 301 - cushion block, 302 - electrochromic device. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0020] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of a kind and are not limited in number, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship.

[0021] The embodiments of the present application disclose a loudspeaker, which can be applied to electronic devices such as mobile phones.

[0022] As described above, due to the influence of size design on current electronic devices, the sound hole is usually opened on the top surface or the bottom surface of the device, and the sound hole is matched with the loudspeaker, so that the loudspeaker can only output sound signals in a side sound emitting manner, thereby causing the loudspeaker to have poor fidelity in the high frequency part. Therefore, the applicant thinks that a high frequency loudspeaker can be added to make up for the loss of the current loudspeaker in the high frequency part after careful research during the design process.

[0023] Based on the above, the applicant proposes that another high-frequency loudspeaker independent of the current loudspeaker can be customized separately, which can improve the sound effect of the electronic device in the high-frequency part. However, if the foregoing technical solution is adopted, higher requirements will be placed on the arrangement and stacking of devices in the electronic device. Based on the current internal design of the electronic device, the newly added high-frequency loudspeaker will occupy additional installation space in the electronic device, which will further increase the stacking requirements of the devices in the electronic device, and the design and implementation are relatively difficult.

[0024] Therefore, the applicant proposes the loudspeaker claimed in the embodiments of the present application after further research, as shown in FIGS. 1-6, the loudspeaker includes a magnetic structure, a voice coil 106, a first diaphragm 108, a second diaphragm 203, and a vibration driving structure. Of course, the loudspeaker can also include other devices such as a spider 105, and for the sake of brevity, this text will not be described in detail here.

[0025] The magnetic structure is used to provide a magnetic field, which can specifically use a permanent magnet or an electromagnet. In order to minimize the energy consumption of the electronic device and reduce the control difficulty of the electronic device, in one specific 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 essentially belongs to an electromagnet, so that when the voice coil 106 is assembled at a corresponding position in the magnetic field of the magnetic structure, the voice coil 106 can produce a mutual attraction or mutual repulsion effect with the magnetic structure when different currents are passed in, and then drive the first diaphragm 108 to reciprocate to produce a sound signal.

[0026] In order to ensure that the loudspeaker disclosed in the embodiments of the present application can produce sound signals of different frequency bands without occupying additional installation space, in the loudspeaker disclosed in the embodiments of the present application, as shown in FIG. 2, the first diaphragm 108 includes a body layer 1082, a ring-shaped connecting portion 1083, and a sunken layer 1084. The body layer 1082 and the sunken layer 1084 are both film-shaped structures, and the magnetic structure, the voice coil 106, and the sunken layer 1084 are all arranged on the same side of the body layer 1082. The body layer 1082 is provided with a mounting hole 1081, the sunken layer 1084 is arranged opposite to the mounting hole 1081, and the sunken layer 1084 is connected to the body layer 1082 through the ring-shaped connecting portion 1083, so that the sunken layer 1084 can surround the ring-shaped connecting portion 1083 to form a mounting groove.

[0027] Intuitively, in the embodiment of the present application, the area covered by the sunken layer 1084 and the body layer 1082 is essentially equal to the area covered by the body layer 1082 without the mounting hole 1081, and by adopting the above structure of the first diaphragm 108, the vibration area of the orthographic projection of the first diaphragm 108 does not decrease compared with a membrane structure of the same shape but with a complete planar structure, so that the installation space of the first diaphragm 108 for providing a device for providing sound at a high frequency part, i.e., the mounting slot, is created while ensuring that the vibration area of the first diaphragm 108 does not decrease, and thus the performance of the loudspeaker at the first frequency band is not affected. Of course, during the formation of the mounting slot, it is still necessary to ensure that the bottom of the mounting slot, i.e., the sunken layer 1084, can be spaced apart from the magnetic structure, i.e., in the embodiment of the present application, a vibration gap is required to be provided between the sunken layer 1084 and the magnetic structure in the thickness direction of the sunken layer 1084, so as to prevent the first diaphragm 108 from contacting the magnetic structure during vibration, which hinders the vibration process of the first diaphragm 108.

[0028] Specifically, the size of the vibration gap can be flexibly selected according to the amplitude and other parameters of the first diaphragm 108, which is not limited herein, and similarly, the shape and size of the mounting hole 1081 and other parameters can also be flexibly selected according to actual needs. Moreover, during the formation of the first diaphragm 108, the body layer 1082, the annular connecting portion 1083 and the sunken layer 1084 can be formed by separate molding, and then the sunken layer 1084 is connected to the body layer 1082 by the annular connecting portion 1083, and the sunken layer 1084 is opposite to the mounting hole 1081 of the body layer 1082, and then the mounting slot is formed by the sunken layer 1084 and the annular connecting portion 1083. In another embodiment of the present application, the first diaphragm 108 is an alloy structure, i.e., the first diaphragm 108 is formed of an alloy material, in which case the body layer 1082, the annular connecting portion 1083 and the sunken layer 1084 can be integrally formed, i.e., the first diaphragm 108 including the body layer 1082, the annular connecting portion 1083 and the sunken layer 1084 is formed by integral molding, which can further improve the modulus of the first diaphragm 108 to improve the installation stability of the vibration driving structure.

[0029] Based on the first diaphragm 108 of the above structure, in the process of assembling the loudspeaker, the voice coil 106 is connected with the body layer 1082, so that the voice coil 106 can cooperate with the magnetic structure, and drive the body layer 1082 and the whole first diaphragm 108 to vibrate. It should be noted that by setting the structure or input signal of the voice coil 106 and the first diaphragm 108 and the like, the voice coil 106 can be used to drive the first diaphragm 108 to vibrate in the first frequency band, which usually includes a low frequency band. Of course, in other embodiments of the present application, the first frequency band can also include a medium frequency band, which is not limited herein.

[0030] At the same time, the second diaphragm 203 is connected to the mounting hole, which enables the mounting slot of the first diaphragm 108 to form another sound cavity with the second diaphragm 203. By arranging the vibration driving structure in the mounting slot, the vibration driving structure can drive the second diaphragm 203 to vibrate under the condition of being electrified, and correspondingly, by setting the composition of the vibration driving structure and the second diaphragm 203 and the input signal and the like, the vibration driving structure can drive the second diaphragm 203 to vibrate in the second frequency band. Of course, in the process of assembling the vibration driving structure and the second diaphragm 203, the vibration driving structure and the second diaphragm 203 need to have the ability to contact each other, so as to ensure that the vibration driving structure can drive the second diaphragm 203 to vibrate when it vibrates. At the same time, the maximum frequency value of the second frequency band is greater than that of the first frequency band, so that the second diaphragm 203 can emit sound signals with a higher frequency than the first diaphragm 108, and as a supplement to the high frequency part of the loudspeaker, the overall performance of the loudspeaker is improved, and the sound effect of the electronic device is relatively good. Specifically, the second frequency band can be a high frequency band, more specifically, the second frequency band can be a specific frequency band of about 10 kHz.

[0031] The embodiment of the present application discloses a loudspeaker, in the first diaphragm 108, the body layer 1082 is provided with a mounting hole 1081, and the magnetic structure, the voice coil 106 and the sunken layer 1084 of the first diaphragm are all arranged on the same side of the body layer 1082 of the first diaphragm 108, the sunken layer 1084 is arranged opposite to the mounting hole 1081, the sunken layer 1084 is connected with the body layer through the annular connecting part 1083, and the sunken layer 1084 and the annular connecting part 1083 enclose a mounting groove, the voice coil 106 is connected with the body layer 1082 of the first diaphragm 108, so that the voice coil 106 can drive the whole first diaphragm 108 to vibrate in the first frequency band under the condition that the voice coil 106 works and cooperates with the magnetic structure, so that the loudspeaker can work in a relatively low frequency band. Wherein, in the thickness direction of the sunken layer 1084, that is, in the overall vibration direction of the first diaphragm 108, a vibration gap is arranged between the sunken layer 1084 and the magnetic structure, so that the groove bottom of the mounting groove on the first diaphragm 108 can be arranged spaced apart from the magnetic structure, so as to ensure that the first diaphragm 108 will not be in contact with the magnetic structure in the process of vibration. At the same time, in the case that the body layer 1082 and the sunken 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 the plane perpendicular to the thickness direction of the first diaphragm 108 is the same as the area of the plane region enclosed by the outer edge of the first diaphragm 108, which can ensure that the vibration area of the above structure will not be lost, and thus the overall performance of the loudspeaker in the above first frequency band will not be reduced.

[0032] At the same time, the second diaphragm 203 is connected to the mounting hole, so that the second diaphragm 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 diaphragm 203 to vibrate in the 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, so that the loudspeaker disclosed by the embodiment of the present application can also work in a relatively high frequency band, thereby improving the performance of the loudspeaker in the high frequency part, solving the problem that the frequency response of the loudspeaker in the high frequency part decreases rapidly due to the sound hole of the electronic device being arranged at the top or the bottom, and thereby making the overall sound output effect of the electronic device relatively high and the user experience better.

[0033] As described above, the first diaphragm 108 is provided with a mounting groove, and the mounting groove is recessed towards the side close to the magnetic structure, in order to prevent the sunken layer 1084 formed by the mounting groove from affecting the vibration amplitude of the whole first diaphragm 108, the mounting hole 1081 can be arranged in the edge region of the body layer 1082 with relatively small vibration amplitude, so as to ensure that the effective size of the vibration gap between the sunken layer 1084 and the magnetic structure is relatively larger.

[0034] In another embodiment of the present application, in order to improve the overall sound effect of the loudspeaker, the mounting hole 1081 can be arranged centrally relative to the 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 one specific embodiment of the present application, the magnetic structure can be provided with a relief structure, and the relief structure is arranged opposite the sinking layer 1084 in the thickness direction of the first diaphragm 108, so as to avoid the sinking layer 1084 by using the relief structure and the sinking layer 1084, thereby preventing the existence of the sinking layer 1084 from causing the vibration amplitude of the first diaphragm 108 to decrease, or causing the probability of mutual collision between the first diaphragm 108 and the magnetic structure during vibration.

[0035] Of course, in order to ensure that the relief structure can avoid the sinking layer 1084 as a whole, in the direction perpendicular to the thickness direction of the first diaphragm 108, the size of the sinking layer 1084 in the corresponding direction needs to be slightly smaller than the size of the relief structure in the corresponding direction. Intuitively, taking the sinking layer as a rectangular structure for example, the positions of the two adjacent sides of the sinking layer 1084 are the width direction and the length direction respectively, wherein the length direction and the width direction are perpendicular to each other and both are perpendicular to the thickness direction of the first diaphragm 108. Based on this, during the design of the relief structure, the relief structure can also be a rectangular recess structure or a through structure. By making the length of the relief structure slightly larger than the length of the sinking layer 1084, and making the width of the relief structure slightly larger than the width of the sinking layer 1084, it can be ensured that the sinking layer 1084 of the first diaphragm 108 can be embedded in the relief structure of the magnetic structure as a whole, so that the relief structure can normally provide relief for the sinking layer 1084.

[0036] Of course, in order to maximize the prevention of the sinking layer 1084 from contacting the inner wall of the relief structure, within a certain size range, the difference between the length and width of the relief structure and the length and width of the sinking layer 1084 can be relatively larger. It should be noted that for the current loudspeaker, the area of the diaphragm is usually larger than the area of the magnetic structure in the plane perpendicular to the thickness direction of the diaphragm. Therefore, even if the relief structure is provided in the embodiment of the present application, it will not substantially affect the magnetic field strength and distribution of the magnetic structure, and the cooperation between the voice coil 106 and the magnetic structure can still be ensured as before.

[0037] As mentioned above, the magnetic structure can include permanent magnets, and considering that the loudspeaker is generally in the shape of a rectangular cuboid, in this case, in order to improve the magnetic field effect of the magnetic structure disclosed in the embodiments of the present application, the magnetic structure can include a central magnet 103 and a plurality of edge magnets 102, the central magnet 103 is in the shape of a cuboid, and the plurality of edge magnets 102 are respectively arranged outside the four sides of the central magnet 103 to provide a supplement to the magnetic field generated by the central magnet 103. On this basis, the central magnet 103 is arranged opposite to the central area of the first diaphragm 108, and as mentioned above, the mounting hole and the sunken layer 1084 can be arranged centrally relative to the body layer 1082 of the first diaphragm 108, and for this purpose, in the embodiments of the present application, the above-mentioned avoiding structure can be arranged on the central magnet 103, and the avoiding structure and the sunken layer 1084 are arranged in an avoiding manner.

[0038] Of course, in order to enable a more stable relative fixed relationship to be formed between the central magnet 103 and the plurality of edge magnets 102, in the embodiments of the present application, the magnetic structure can further include a magnetic bowl 101, the magnetic bowl 101 can be formed of a non-magnetic material, so that it can mainly exist as a mounting basis for the central magnet 103 and the edge 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, so as to further improve the stability and other parameters of the magnetic field.

[0039] In detail, affected by the initial spacing and other parameters of the sunken layer 1084 of the first diaphragm 108 and the central magnet 103 in the thickness direction of the first diaphragm 108, in one specific embodiment of the present application, the central magnet 103 can be provided with an avoiding sunken groove, the avoiding sunken groove is recessed from the central magnet 103 towards the side surface of the body layer 1082, and the avoiding sunken groove and the sunken layer 1084 are arranged in an avoiding manner. That is, in the embodiments of the present application, the avoiding sunken groove arranged on the central magnet 103 has a groove bottom, and the avoiding sunken groove does not penetrate through the central magnet 103, and of course, the depth of the avoiding sunken groove can be flexibly selected according to the vibration amplitude and other parameters of the first diaphragm 108.

[0040] In order to further prevent the sunken layer 1084 of the first diaphragm 108 from contacting the central magnet 103 during vibration, in another embodiment of the present application, the central magnet 103 is provided with a first through hole 1031, and obviously, the first through hole 1031 is arranged penetrating through the central magnet 103 along the thickness direction of the first diaphragm 108, in this case, the first through hole 1031 and the sunken layer 1084 are arranged in an avoiding manner, in this case, when the sunken layer 1084 vibrates with the body layer 1082, the sunken layer 1084 and the central magnet 103 of the magnetic structure can be basically prevented from contacting each other, and the vibration process of the first diaphragm 108 is not hindered.

[0041] Of course, no matter whether the avoiding recess is arranged on the center magnet 103 or the first through hole 1031 is arranged on the center magnet 103, in the direction perpendicular to the thickness direction of the first diaphragm 108, the size of the avoiding recess or the first through hole 1031 still needs to be ensured to be greater or slightly greater than the size of the sunken layer 1084 in the corresponding direction, so as to ensure that the avoiding recess and the first through hole 1031 both have the ability to avoid the sunken layer 1084.

[0042] 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 can further include a magnetic conducting plate 104, and the magnetic conducting plate 104 is clamped between the center magnet 103 and the first diaphragm 108, so as to re-plan the distribution of the magnetic field generated by the magnetic conducting plate 104 and the magnetic member such as the center magnet 103, and improve the overall magnetic effect of the magnetic structure. In the case where the magnetic structure includes the magnetic conducting plate 104 and the magnetic conducting plate 104 is clamped between the first diaphragm 108 and the center magnet 103, in order to ensure that the magnetic conducting plate 104 does not hinder the vibration process of the sunken layer 1084, the second through hole 1041 is arranged on the magnetic conducting plate 104, so as to avoid the arrangement of the second through hole 1041 and the sunken layer 1084.

[0043] In a specific embodiment of the present application, the shape and size of the second through hole 1041 can be different from those of the avoiding recess (or the first through hole 1031) on the center magnet 103. In order to reduce the processing difficulty of the magnetic member and the center magnet 103, and to prevent the loss of the magnetic field strength of the magnetic structure as much as possible, in another embodiment of the present application, the shape of the second through hole 1041 can be the same as that of the avoiding recess (or the first through hole 1031), and in the direction perpendicular to the thickness direction of the first diaphragm 108, the size of the second through hole 1041 can be the same or substantially the same as that of the avoiding recess (or the first through hole 1031) in the corresponding direction.

[0044] As described above, the shape of the sunken layer 1084 and the mounting groove can be flexibly selected according to actual needs, and in a specific embodiment of the present application, the first diaphragm 108, the mounting hole 1081 and the second diaphragm 203 can all have a substantially rectangular structure, so that the sound production effects of the first diaphragm 108 and the second diaphragm 203 are relatively good, so as to further improve the overall sound effect of the loudspeaker. Correspondingly, in the case where the magnetic structure includes the magnetic conducting plate 104 and the center magnet 103, the shapes of the second through hole 1041 and the avoiding recess (or the first through hole 1031) can also be substantially rectangular.

[0045] In addition, the second diaphragm 203 is connected to the mounting hole of the first diaphragm 108, and therefore, the arrangement of the second diaphragm 203 and the vibration driving structure can interfere with the vibration process of the first diaphragm 108, and therefore, in the case of ensuring that the performance of the loudspeaker in the second frequency band can basically meet the requirements, in order to reduce the interference degree of the arrangement of the second diaphragm 203 and the vibration driving structure on the first diaphragm 108 as much as possible, in the embodiment of the present application, the area of the projection of the second diaphragm 203 in the plane perpendicular to the thickness direction of the first diaphragm 108 is between 6% and 10% of the area of the projection of the first diaphragm 108 in the aforementioned plane.

[0046] In a specific embodiment of the present application, taking a loudspeaker with a length and width of 15 mm and 11 mm as an example, in order to improve the performance of the loudspeaker around 10 kHz, i.e., in the second frequency band, the area of the projection of the second diaphragm 203 in the aforementioned plane is about 10 mm2, and the area of the projection of the first diaphragm 108 in the aforementioned plane is about 130 mm2, and as shown in FIG. 6, the second diaphragm 203 is arranged at the mounting hole of the first diaphragm 108.

[0047] As described above, the vibration driving structure is arranged in the mounting groove and located on the side of the second diaphragm 203 facing the magnetic structure, although the overall weight of the vibration driving structure and the second diaphragm 203 is relatively small, in order to further reduce the interference of the two on the normal operation of the first diaphragm 108, in a specific embodiment of the present application, as described above, the first diaphragm 108 can be an alloy structure, which can further improve the modulus of the first diaphragm 108, and the reliability of the first diaphragm 108 on which the second diaphragm 203 and the vibration driving structure are arranged is further improved.

[0048] Of course, considering that the overall size of the first diaphragm 108 is relatively large, in a specific embodiment of the present application, in order to reduce the processing difficulty of the first diaphragm 108, the first diaphragm 108 can include a ball top, the ball top includes the body layer 1082, the annular connecting portion 1083 and the sunken layer 1084, and the outer edge of the ball top is further provided with the diaphragm folded ring 107, the ball top and the diaphragm folded ring 107 are formed separately, and in the assembly process of the loudspeaker, the ball top and the diaphragm folded ring 107 are connected to form a connection relationship, so that the ball top is connected to the device such as the basket 105 by the diaphragm folded ring 107. As for the second diaphragm 203, since its overall size is relatively small, the second diaphragm 203 can include an integrally designed folded ring and a ball top.

[0049] Optionally, the driving mode of the vibration driving structure is the same as the driven mode of the first diaphragm 108, that is, the driving mode is different from the current passing through the electromagnet, the acting direction between the electromagnet and the other magnet is changed, so as to achieve the purpose of driving the second diaphragm 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 shown in FIGS. 3 and 4, the driving magnet 201 can generate a corresponding magnetic field, so that in the case of energizing the driving coil 202, 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 generate a mutual repulsion or mutual attraction motion form; at the same time, by connecting one of the driving coil 202 and the driving magnet 201 to the second diaphragm 203, and connecting the other to the subsidence layer 1084, the interaction between the driving coil 202 and the driving magnet 201 can drive the second diaphragm 203 to vibrate relative to the subsidence layer 1084, thereby making the second diaphragm 203 emit sound waves of the second frequency band.

[0050] Of course, for the driving magnet 201, it can also include a coil. In another embodiment of the present application, in order 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 also be designed and adjusted according to the actual situation to ensure that they do not interfere with each other and hinder the normal vibration of the first diaphragm 108 and the second diaphragm 203. In addition, in the case of the driving magnet 201 including a permanent magnet, considering that the weight of the permanent magnet is usually relatively larger than that of the driving coil 202, in order to reduce the load of the second diaphragm 203, in the 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 subsidence 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.

[0051] Considering that the magnetic field generated by the driving magnet 201 is range-distributed, for this reason, in the thickness direction of the second diaphragm 203, the driving coil 202 and the driving magnet 201 are not necessarily opposite each other. In this case, the driving coil 202 and the driving magnet 201 can be arranged in a staggered manner, one of the driving coil 202 and the driving magnet 201 connected to the second diaphragm 203 is spaced apart from the subsidence layer 1084, and one connected to the subsidence layer 1084 is spaced apart from the second diaphragm 203, so as to ensure that the second diaphragm 203 has a relatively larger vibration space.

[0052] In order to further improve the effect between the driving coil 202 and the driving magnet 201, in another embodiment of the present application, the driving coil 202 and the driving magnet 201 can be oppositely arranged in the thickness direction of the second diaphragm 203, and further, the two can be oppositely arranged in the thickness direction of the second diaphragm 203. Of course, in the embodiment of the present application, in order to ensure that the second diaphragm 203 can still normally vibrate, during the design and assembly process, the driving coil 202 and the driving magnet 201 need to be arranged in the thickness direction of the second diaphragm 203. In order to reserve a corresponding space for the vibration process of the second diaphragm 203.

[0053] As described above, the vibration driving structure can include the driving coil 202 and the driving magnet 201, and in other embodiments of the present application, as shown in FIG. 5, the vibration driving structure can also include the electro-deformation member 302, and the electro-deformation member 302 is connected with the second diaphragm 203, so that the electro-deformation member 302 can drive the second diaphragm 203 to vibrate in the second frequency band when energized.

[0054] Specifically, the electro-deformation member 302 can be formed of piezoelectric material such as piezoelectric ceramic, and in the energized state, the middle part of the electro-deformation member 302 can generate a warp, and the direction of the warp corresponds to the direction of the current. In this case, by alternately controlling the direction of the current flowing into the electro-deformation member 302 to change, the electro-deformation member 302 can reciprocally warp in opposite directions to drive the second diaphragm 203 to vibrate. In another embodiment of the present application, the electro-deformation member 302 can also be formed of memory alloy material, and the memory alloy can also change its shape when energized, thereby changing the distance between the second diaphragm 203 and the sunken layer 1084.

[0055] In order to further improve the effect of the warp action or deformation action of the electro-deformation member 302 on the second diaphragm 203, in a specific embodiment of the present application, along the thickness direction of the second diaphragm 203, one side surface of the electro-deformation member 302 can be connected with the second diaphragm 203, and the other side surface of the electro-deformation member 302 can be connected with the sunken layer 1084, so that the electro-deformation member 302 can be integrally supported between the sunken layer 1084 of the first diaphragm 108 and the second diaphragm 203, which can make the effect of the electro-deformation member 302 on the second diaphragm 203 relatively better.

[0056] In view of the relatively small overall size of the second diaphragm 203 and the relatively large density of the electro-deformation member 302 due to the material, in order to prevent the relatively large weight of the electro-deformation member 302 from adversely affecting the structural stability and vibration reliability of the first diaphragm 108, in another embodiment of the present application, the electro-deformation member 302 can be spaced apart from the sunken layer 1084 in the thickness direction of the second diaphragm 203, in which case the size and weight of the electro-deformation member 302 are relatively small.

[0057] At the same time, in order to ensure that the effect of the electro-deformation member 302 on the second diaphragm 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 electro-deformation member 302 and the sunken layer 1084, so that the effect of the electro-deformation member 302 can still be well transmitted to the second diaphragm 203.

[0058] In a specific embodiment of the present application, the density of the pad 301 can be relatively small, which can greatly reduce the weight of the entire vibration driving structure, so as to prevent the vibration driving structure from having a large adverse effect on the vibration reliability and structural stability of the first diaphragm 108. In another embodiment of the present application, in the direction perpendicular to the warping direction of the electro-deformation member 302, that is, in the distribution direction of the two sides of the electro-deformation member 302 where warping does not occur, the size of the pad 301 is smaller than that of the electro-deformation member 302, and the pad 301 is centrally arranged relative to the electro-deformation member 302 in the aforementioned direction, which can improve the effect of the electro-deformation member 302 on the second diaphragm 203. Of course, in still another embodiment of the present application, both of the above-mentioned technical solutions can be used at the same time to take into account the vibration effect of the second diaphragm 203 and the structural stability and vibration reliability of the first diaphragm 108.

[0059] Based on any of the above-mentioned embodiments of the loudspeaker, the present application further discloses an electronic device comprising a shell and any of the above-mentioned loudspeakers. The shell comprises long sides and short sides. As the name implies, due to the current design factor that the outer shape of the electronic device is usually rectangular, the outer side of the electronic device usually comprises two relatively large and oppositely arranged long sides, and two relatively small and oppositely arranged short sides. Among them, due to the use habit of the electronic device, the long sides are usually called left side and right side, and the short sides are usually called top side and bottom side. In the electronic device disclosed in the embodiment of the present application, the end side is provided with a sound hole, the loudspeaker is mounted on the shell, and the loudspeaker is in communication with the sound hole. Of course, the electronic device also includes a battery and other devices, and for the sake of brevity, they will not be described one by one here.

[0060] It should be noted that, in the present document, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the methods and apparatus of the present embodiments are not limited by the order of the steps or the sequence for performing the steps, as some steps can occur in different orders and / or concurrently with each other. Also, described features can be combined in

[0061] The embodiments of the present application are described above with reference to the accompanying drawings, but the present application is not limited to the above-described specific embodiments, and the above-described specific embodiments are merely illustrative, not restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the scope protected by the claims.

Claims

1. A loudspeaker comprising a magnetic structure, a voice coil, a first diaphragm, a second diaphragm and a vibration driving structure, wherein, the first diaphragm comprises a body layer, a ring-shaped connecting portion and a sunken layer, the body layer is provided with a mounting hole, the magnetic structure, the voice coil and the sunken layer are arranged on the same side of the body layer, the sunken layer is arranged opposite to the mounting hole, the sunken layer is connected to the body layer through the ring-shaped connecting portion, the sunken layer and the ring-shaped connecting portion enclose a mounting slot, the voice coil is connected to the body layer, the voice coil is used to cooperate with the magnetic structure to drive the first diaphragm to vibrate in a first frequency band, and a vibration gap is arranged between the sunken layer and the magnetic structure in the thickness direction of the sunken layer; the second diaphragm is connected to the mounting hole, and the vibration driving structure is arranged in the mounting slot, the vibration driving structure is used to drive the second diaphragm 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 of claim 1, wherein, the magnetic structure comprises a center magnet, the center magnet is provided with a recessed groove, the recessed groove is recessed from the center magnet towards the surface of the body layer, and the recessed groove and the sunken layer are arranged to avoid each other.

3. The loudspeaker of claim 1, wherein, the magnetic structure comprises a center magnet, the center magnet is provided with a first through hole, and the first through hole and the sunken layer are arranged to avoid each other.

4. The loudspeaker of claim 2 or 3, wherein, the magnetic structure further comprises a magnetic conductive plate, the magnetic conductive plate is arranged between the center magnet and the first diaphragm, the magnetic conductive plate is provided with a second through hole, and the second through hole and the sunken layer are arranged to avoid each other.

5. The loudspeaker of claim 1, wherein, the vibration driving structure comprises a driving coil and a driving magnet, one of the driving coil and the driving magnet is connected to the second diaphragm, and the other is connected to the sunken layer.

6. The loudspeaker of claim 5, wherein, the driving coil and the driving magnet are arranged opposite to and spaced apart from each other in the thickness direction of the second diaphragm.

7. The loudspeaker of claim 1, wherein, the vibration driving structure comprises an electro-deformation device, the electro-deformation device is connected to the second diaphragm, and the electro-deformation device is used to drive the second diaphragm to vibrate in a second frequency band when energized.

8. The loudspeaker of claim 7, wherein, the electro-deformation device is arranged spaced apart from the sunken layer in the thickness direction of the second diaphragm; the vibration driving structure further comprises a pad, the pad is arranged between the electro-deformation device and the sunken layer.

9. The loudspeaker of claim 1, wherein, the first diaphragm is an alloy structural member, and the body layer, the ring-shaped connecting portion and the sunken layer are integrally formed. 10.An electronic device comprising a shell and the loudspeaker of any one of claims 1-9, the shell comprises a long side and a short side, the short side is provided with a sound outlet hole, the loudspeaker is mounted on the shell, and the loudspeaker communicates with the sound outlet hole.

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