[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0028] It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain that it is in a specific posture (as shown in the drawings). If the specific posture changes, the relative positional relationship, movement, etc. of the components below will also change the directional indication accordingly.
[0029] In addition, if there are descriptions related to "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and cannot be understood as instructions or implications Its relative importance or implicitly indicates the number of technical features indicated. Therefore, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the "and/or" in the full text means that it includes three parallel schemes, taking "A and/or B as an example", including scheme A, scheme B, or schemes in which both A and B meet. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on what can be achieved by a person of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that such a combination of technical solutions does not exist. , Is not within the protection scope of the present invention.
[0030] The present invention provides a sound emitting device, which is used in an electronic device, where the electronic device may be a device capable of sounding such as a mobile phone, a tablet computer, or a headset.
[0031] In the embodiment of the present invention, please refer to Figure 1 to Figure 4 The sound generating device includes a magnetic circuit system 30, a vibration system 20, and a metal housing 10. The magnetic circuit system 30 includes a magnetic yoke 31, a side magnet 32 provided on the magnetic yoke 31, and a side magnetic guide provided on the upper end of the side magnet 32 A magnetic gap 34 is formed inside the plate 35 and the side magnet 32. The vibration system 20 includes a diaphragm 21 and a voice coil 22 provided on the diaphragm 21. The voice coil 22 extends at least partially into the magnetic gap 34. The metal casing 10 is arranged in a ring shape, the diaphragm 21 is installed on the upper end of the metal casing 10, the side magnetic conductive plate 35 is connected to the lower end of the metal casing 10, and the metal casing 10 and the side magnetic conductive plate 35 are integrally drawn and formed.
[0032] Specifically, the material of the metal casing 10 and the side magnetic conductive plate 35 are both magnetically permeable metal, and the metal casing 10 and the side magnetic conductive plate 35 are magnetically permeable metal plates that are integrally drawn and formed by a stamping die. In one embodiment, a central magnet 33 is provided on the magnetic yoke 31, a magnetic gap 34 for accommodating the voice coil 22 is formed between the inner side of the side magnet 32 and the central magnet 33, and the side magnetic plate 35 is located away from the side magnet 32. The surface of the yoke 31, that is, the side magnetic conductive plate 35 is located at the upper end of the side magnet 32. The metal casing 10 is arranged in a ring shape with open ends, wherein the metal casing 10 may be rectangular, circular, oval, or racetrack-shaped, or polygonal. In addition, the diaphragm 21 may be adhered to the metal casing 10, or the diaphragm 21 may be pressed onto the upper end of the metal casing 10 through a cover plate.
[0033] The technical solution of the present invention adopts the method of integral deep-drawing and molding of the metal casing 10 and the side magnetic conductive plate 35. Compared with the method of integral injection molding of the plastic casing and the side magnetic conductive plate 35, the metal casing 10 has greater strength and is not easy. By deforming, the wall thickness of the metal shell 10 can be set smaller. Furthermore, when the external dimensions of the sound emitting device are the same, the inner cavity space of the metal shell can be increased, and the width of the folded ring portion 212 of the diaphragm 21 can be increased, effectively increasing the vibration space of the diaphragm 21. Since the strength of the metal casing 10 is easily ensured, and there is no need to increase the wall thickness of the metal casing 10 to increase the strength, the metal casing 10 can be arranged in a straight wall of equal thickness, thereby reducing the folding ring portion of the diaphragm 21 The possibility of 212 touching the inner wall of the metal shell 10 can better ensure the vibration effect of the diaphragm 21 and improve the acoustic performance of the sound device. In addition, compared to the method of welding the metal housing 10 and the side magnetic guide plate 35, when the metal housing 10 and the side magnetic guide plate 35 are integrally drawn and formed, the connection between the metal housing 10 and the side magnetic guide plate 35 is more reliable and more stable. Good, high structural strength, not easy to deform, and also eliminates the subsequent assembly process of the metal housing 10 and the side magnetic conductive plate 35, simplifies the installation process of the sound device, and can improve production efficiency.
[0034] In one embodiment, the height from the top surface of the metal casing 10 to the top surface of the side magnetic conductive plate 35 is greater than or equal to 0.9 mm. Specifically, the top surface of the metal casing 10 is its upper end surface, the diaphragm 21 is mounted on the top surface of the metal casing 10, the top surface of the side magnetic guide plate 35 is the surface facing the diaphragm 21, and the top surface of the metal casing 10 The height to the top surface of the side magnetic conductive plate 35 is the vibration space of the diaphragm 21. By setting the height to be greater than or equal to 0.9 mm, a larger vibration space can be provided for the diaphragm 21, and the ring portion of the diaphragm 21 can be reduced. The possibility that the 212 touches the inner wall of the metal shell 10 can also facilitate the installation of the downward vibration diaphragm 21 with a large amplitude, which is beneficial to improve the acoustic performance of the sound generating device. Moreover, when the metal casing 10 and the side magnetic guide plate 35 are integrally drawn and formed, it is easier to form a height of at least 0.9 mm, and at the same time, the strength requirements of the metal casing 10 can be ensured.
[0035] In one embodiment, the thickness of the metal shell 10 is greater than or equal to 0.25 mm and less than or equal to 0.4 mm. In the existing method of integral injection molding of the plastic shell and the side magnetic conductive plate 35, the width of the top surface of the plastic shell is usually greater than 0.5mm. In order to ensure the strength of the plastic shell, the lower end of the plastic shell is usually thickened. The wall thickness of the lower end of the plastic housing is greater than the width of the top surface of the plastic housing, and the maximum thickness of the plastic housing is generally greater than 0.7 mm, which causes the vibration space of the diaphragm 21 to be compressed and reduced. When the thickness of the metal housing 10 is set to be greater than or equal to 0.25 mm and less than or equal to 0.4 mm by adopting the method of integral deep drawing of the metal housing 10 and the side magnetic conductive plate 35, compared with the plastic housing, the thickness of the metal housing 10 is equivalent to The thickness is reduced by about 50%, and the wall thickness of the upper end and the lower end of the metal casing 10 can be ensured to be the same or nearly the same, which greatly reduces the possibility that the folding ring portion 212 of the diaphragm 21 touches the inner wall of the metal casing 10 Therefore, the vibration effect of the diaphragm 21 can be better guaranteed.
[0036] In this embodiment, the diaphragm 21 includes a central portion 213, a folding ring portion 212 arranged around the central portion 213, and a fixing portion 211 arranged around the folding ring portion 212. The fixing portion 211 is mounted on the upper end of the metal casing 10, and the folding ring portion 212 It protrudes toward the side magnetic conductive plate 35. Specifically, the folded ring portion 212 and the central portion 213 are spaced from the side magnetic conductive plates 35, and the voice coil 22 is connected to the central portion 213 and is located on the side of the central portion 213 facing the side magnetic conductive plates 35, so that the voice coil 22 extends at least partially into the magnetic gap 34. By adopting the method of integral deep-drawing and forming of the metal casing 10 and the side magnetic guide plate 35, the vibration space in the metal casing 10 is effectively increased. When the folding ring portion 212 is protruding toward the side magnetic guide plate 35, it can be better To ensure the vibration effect of the folding ring portion 212. Of course, in other embodiments, the folded ring portion 212 may also protrude in a direction away from the side magnetic guide plate 35.
[0037] In one embodiment, the diaphragm 21 is adhered to the top surface of the metal casing 10, and the connection between the inner peripheral surface of the metal casing 10 and the top surface is rounded. That is, the top surface and the inner peripheral surface of the metal shell 10 are rounded transitions, and the top surface is coated with tape for the installation of the diaphragm 21. It can be understood that when the diaphragm 21 vibrates, the part of the diaphragm 21 outside the top surface will move up and down. If the inner edge of the top surface is set at a right angle, the diaphragm 21 may abut the top surface when it vibrates downwards. The sharp corners of the inner edge easily cause the diaphragm 21 to deform or even be damaged. By making the inner edge of the top surface excessively rounded, when the diaphragm 21 vibrates downwards, the diaphragm 21 contacts a smoother curved surface, so that the deformation of the diaphragm 21 at this position is more uniform, which can reduce the vibration. The wear of the diaphragm 21 is beneficial to improve the life of the diaphragm 21.
[0038] The side magnetic conductive plate 35 has various structures. For example, in one embodiment, the side magnetic conductive plate 35 extends in a ring shape along the circumferential direction of the metal housing 10, and the inner edge of the side magnetic conductive plate 35 is provided with a plurality of circumferentially extending edges. Avoidance gaps 352 arranged at intervals. Specifically, the side magnetic conductive plate 35 includes a magnetic conductive portion 354 and a connecting portion 353. The magnetic conductive portion 354 has a ring shape, and the connecting portion 353 surrounds the outer peripheral edge of the magnetic conductive portion 354 as a whole. The avoidance notch 352 is provided in the magnetic conductive part 354, and the plurality of avoidance notches 352 separate the magnetic conductive part 354 into multiple sections, which is equivalent to the plurality of magnetic conductive parts 354 arranged at intervals along the circumferential direction of the connecting part 353, and the number of side magnets 32 There are also multiple ones, and the multiple side magnets 32 are arranged in a one-to-one correspondence with the multiple magnetic conductive parts 354. The avoidance gap 352 can be used to avoid the voice coil lead of the voice coil 22 (not shown in the figure), which can provide sufficient avoidance space for the lead of the voice coil, and prevent the vibration of the voice coil lead from hitting the side magnetic plate 35 and affecting the sound production The sound quality of the device. Among them, the number of avoidance gaps 352 can be two, three, four, and so on. In addition, when the side magnetic guide plate 35 is in a rectangular ring shape, avoidance notches 352 can be provided at the corners of two adjacent sides. When the side magnetic guide plate 35 is in a circular ring shape, a plurality of avoidance notches 352 can be evenly distributed.
[0039] In another embodiment, the number of the side magnetic conductive plates 35 is multiple, and the multiple side magnetic conductive plates 35 are all disposed on the inner peripheral surface of the metal casing 10 and arranged at intervals along the circumferential direction of the metal casing 10. Specifically, the number of side magnets 32 is also multiple, and the multiple side magnets 32 correspond to the multiple side magnetic conductive plates 35 one-to-one, and the multiple side magnetic conductive plates are arranged independently, and each side magnetic conductive plate 35 is connected to metal The inner peripheral surface of the housing 10 is connected. It can easily lead the voice coil lead (not shown in the figure) from the gap between the two adjacent magnetic conductive plates 35, and can also provide sufficient avoidance space for the lead of the voice coil to prevent the voice coil lead from vibrating against the side magnetic conductive plate 35. Affect the sound quality of the sound device. Among them, the number of side magnetic guide plates 35 can be two, three, four, and so on.
[0040] After the side magnetic conducting plate 35 is arranged on the lower end of the metal casing 10, it is equivalent to setting the metal casing 10 above the side magnet 32, and the metal casing 10 is fixed to the magnetic circuit system 30 through the side magnetic conducting plate 35. There is no direct connection between the housing 10 and the side magnets 32 and the magnetic yoke 31, so in order to facilitate the installation of the magnetic circuit system 30, in one embodiment, the side magnetic plate 35 is provided with positioning holes 351, and the magnetic yoke 31 is provided There is a positioning convex portion 311, and the positioning convex portion 311 is mated with the positioning hole 351. In this way, when the magnetic circuit system 30 is installed, the positioning protrusion 311 on the magnetic yoke 31 can be inserted and matched with the positioning hole 351 to ensure that the side magnets 32 and the side magnetic plates 35 are installed correspondingly, which is convenient for installation and is beneficial for improvement. Installation efficiency. Among them, in order to improve the space utilization of the sound generating device and avoid interference between the side magnets 32 and the positioning protrusions 311, in an embodiment where the number of side magnets 32 is more than one, the positioning protrusions 311 may be provided on two adjacent magnets 32. In the gap between, the positioning hole 351 is provided corresponding to the positioning convex portion 311, so that the structure of the sound generating device is more compact. Wherein, the number of positioning holes 351 is multiple, for example, the number of positioning holes 351 may be two, three, four, and so on.
[0041] In one embodiment, a bending portion (not shown in the figure) is provided on the inner edge of the side magnetic conductive plate 35 close to the voice coil 22, and the bending portion is bent in the direction of the diaphragm 21. The bent portion is formed by bending the side of the side magnetic conductive plate 35 close to the magnetic gap 34, that is, the bent portion and the side magnetic conductive plate 35 are integrally provided. By providing a bent portion on the inner edge of the side magnetic conductive plate 35 close to the voice coil 22, when the bent portion is bent in the direction of the diaphragm 21, the thickness of the inner edge of the side magnetic conductive plate 35 is increased. Moreover, the size of the bent portion is less restricted by the side magnetic conductive plate 35. Even when the side magnetic conductive plate 35 is thin, the size of the bent portion that is bent in the direction of the diaphragm 21 can be extended by extending. Furthermore, the thickness of the side magnetic guide plate 35 can be reduced as much as possible to avoid the situation that the side magnetic guide plate 35 is too thick and the vibration space of the diaphragm 21 becomes smaller. This can increase the inner edge of the side magnetic guide plate 35. The thickness and lifting force coefficient (BL value) can effectively improve the magnetic permeability, and can better ensure that the diaphragm 21 has enough vibration space, and can improve the acoustic performance of the sound device.
[0042] In an embodiment, the bending portion includes a first bending section (not shown in the figure), and the first bending section is connected to the side magnetic conductive plate 35 and extends in the direction of the diaphragm 21. Specifically, the first bending section is bent and arranged approximately in an "L" shape, and the first bending section is arranged parallel or nearly parallel to the outer peripheral surface of the voice coil 22, so that the first bending section and the voice coil 22 The gap is relatively uniform, which can also make the area of the first bending section facing the voice coil 22 larger. In addition, the bending height of the first bending section can be made larger, that is, the height of the first bending section along the thickness direction of the side magnetic conductive plate 35, which can further increase the inner edge of the side magnetic conductive plate 35. Thickness can further improve the magnetic permeability. Moreover, the structure of the bent portion formed by such bending is simple, which can reduce the processing steps and improve the production efficiency of the sound generating device.
[0043] In addition, to further improve the magnetic permeability, in one embodiment, the bending portion further includes a second bending section (not shown in the figure) connected to the first bending section, and the second bending section is from the first bending section. It extends in a direction away from the voice coil 22. Specifically, the second bending section extends along the arrangement direction of the voice coil 22 and the housing, that is, the first bending section is first bent toward the diaphragm 21, and then the first bending section is guided away from the side. The free end of the magnetic plate 35 is bent in a direction away from the voice coil 22 to form a second bending section extending away from the voice coil 22, which is equivalent to increasing the bending portion along the voice coil 22 and the housing. The width of the cloth direction. It can be understood that when the first bending section is bent in the direction of the diaphragm 21, the width of the first bending section is close to the thickness of the side magnetic conductive plate 35, and when the thickness of the side magnetic conductive plate 35 is thin, the first bending The width of the segment is correspondingly smaller. By providing the second bending section, the width of the bending portion can be increased, which is equivalent to increasing the area of the thickened area of the side magnetic conductive plate 35, which can further increase the force coefficient (BL value) and further effectively improve the magnetic permeability. . Wherein, the second bending section may be arranged in an arc shape, or may be arranged in a straight section.
[0044] In addition, in other embodiments, the bent portion and the side magnetic conductive plate 35 may be inclined at an acute angle, or the bent portion may be first bent in the direction of the diaphragm 21 and then bent in the direction of the side magnetic conductive plate 35 , Or the bending part is arranged with overlapping bending and so on. In addition, the shape of the bending portion can be set according to the actual situation. For example, when a plurality of bending portions arranged at intervals along the circumferential direction of the housing are provided, the plurality of bending portions can be set to include only the first bending section. , That is, the bending part is roughly arranged in an "L" shape. Alternatively, the plurality of bending parts are arranged to include the first bending section and the second bending section. Or, some of the bending parts are arranged in an "L" shape, and some of the bending parts are arranged in a structure including a first bending section and a second bending section.
[0045] The present invention also provides an electronic device that includes an equipment main body and a sounding device. The specific structure of the sounding device refers to the above-mentioned embodiments. Since this electronic device adopts all the technical solutions of all the above-mentioned embodiments, it has at least the above-mentioned implementations. All the beneficial effects brought about by the technical solutions of the examples will not be repeated here. Among them, the sound device is arranged on the main body of the device. The electronic device may be a device capable of producing sound such as a mobile phone, a tablet computer, or a headset.
[0046] The above are only the preferred embodiments of the present invention, and do not limit the scope of the present invention. Under the inventive concept of the present invention, equivalent structural transformations made by using the contents of the description and drawings of the present invention, or direct/indirect use Other related technical fields are included in the scope of patent protection of the present invention.
