Speaker and electronic device

Abstract

The present disclosure relates to a loudspeaker and an electronic device. The loudspeaker comprises a vibration system including a plurality of voice coils, the plurality of voice coils being symmetrically distributed or circumferentially uniformly distributed; a magnetic circuit system provided with a magnetic gap, the voice coils being located in the magnetic gap; and an auxiliary system, the auxiliary system comprising a balance support for connecting the plurality of voice coils so that vibrations of the plurality of voice coils are consistent; a guide rail cooperating with the balance support, an extension direction of the guide rail being consistent with a vibration direction of the voice coils; the voice coils move up and down in the magnetic gap of the magnetic circuit system under force, driving the balance support to reciprocate along the guide rail. The plurality of voice coils improves the effective length of the voice coil in the same area, improves the space utilization and driving force. The voice coils are symmetrically or circumferentially uniformly distributed, interact with the balance support and the guide rail, the voice coil vibration is symmetrical and consistent, and the voice coil polarization is reduced. The guide rail passes through the balance support, so that the voice coil can only move in the vertical direction.

Description

Technical Field

[0001] This disclosure relates to the field of electroacoustic technology, and more particularly to a loudspeaker and electronic device. Background Technology

[0002] A loudspeaker is an important component in electroacoustic devices, converting electrical signals into sound waves to produce sound. The design of the loudspeaker's internal structure plays a crucial role in the entire audio system, significantly impacting the final sound quality.

[0003] In the structure of a miniature loudspeaker, the distribution design of the magnetic circuit system affects the distribution of the entire magnetic field. The coordinated design of the entire magnetic circuit and voice coil can provide better driving force for the entire vibration system, thereby improving the acoustic performance of the entire miniature loudspeaker.

[0004] However, in related technologies, voice coils and magnetic circuits are mostly rectangular. The rectangular magnetic circuit distribution results in an uneven and insufficiently full magnetic field, leading to low utilization of the magnetic field generated by the magnetic circuit system. The effective length of a rectangular coil is also limited within the same area, resulting in insufficient overall driving force. Furthermore, most related technologies use a single rectangular coil, which, due to factors such as coil stress and installation processes, is prone to voice coil polarization. Ultimately, this affects the overall acoustic performance of the loudspeaker. Summary of the Invention

[0005] To overcome the problems existing in the related technologies, this disclosure provides a loudspeaker and an electronic device.

[0006] According to a first aspect of the present disclosure, a loudspeaker is provided, the loudspeaker comprising: a vibration system including a plurality of voice coils, the plurality of voice coils being symmetrically distributed or circumferentially uniformly distributed; a magnetic circuit system having a magnetic gap, the voice coils being located in the magnetic gap; and an auxiliary system comprising: a balance bracket for connecting the plurality of voice coils to make the vibration of the plurality of voice coils consistent; a guide rail cooperating with the balance bracket, the extension direction of the guide rail being consistent with the vibration direction of the voice coils; the voice coils are subjected to force and move up and down within the magnetic gap of the magnetic circuit system, driving the balance bracket to reciprocate along the guide rail.

[0007] In some embodiments, the voice coil is triangular.

[0008] In some embodiments, the number of voice coils is four, the four voice coils are combined to form a quadrilateral, and the two opposite voice coils are centrally symmetrically distributed.

[0009] In some embodiments, the guide rail coincides with the center of symmetry of the voice coil, and the balance bracket is sleeved on the outside of the guide rail.

[0010] In some embodiments, the balance bracket is quadrilateral, and the four corners of the balance bracket are respectively connected to the apex corners of the four voice coils.

[0011] In some embodiments, the magnetic circuit system includes: four central magnetic circuits arranged in a triangle, each having one outer side and two inner sides; four outer magnetic circuits disposed outside the outer side of the central magnetic circuits and spaced apart from the outer side of each central magnetic circuit to form a first gap; and four inner magnetic circuits disposed between the inner sides of two adjacent central magnetic circuits and spaced apart from the inner side of the central magnetic circuits to form a second gap; the first gap and the second gap constitute the magnetic gap.

[0012] In some embodiments, the vibration system further includes a diaphragm, the dome of which abuts against the voice coil.

[0013] In some embodiments, the auxiliary system further includes: a rear shell, to which the magnetic circuit system is fixed; a frame, wherein the outer side of the magnetic circuit of the magnetic circuit system away from the rear shell is abutted and fixed to the frame; and a side frame, wherein one side of the side frame abuts against the frame and the other side of the side frame abuts against the folded ring of the diaphragm.

[0014] In some embodiments, the auxiliary system further includes: two flexible circuit boards symmetrically arranged on one side of the frame near the rear shell.

[0015] In some embodiments, the flexible circuit board has an auxiliary film on one side near the rear shell. The auxiliary film includes: an edge that is attached to the flexible circuit board; and an arc-shaped groove that abuts against the rear shell and is capable of elastic deformation.

[0016] According to a second aspect of the present disclosure, an electronic device is provided, including a speaker as described in the first aspect.

[0017] The technical solutions provided by the embodiments of this disclosure can include the following beneficial effects: By setting multiple voice coils, the effective length of the voice coils can be increased within the same area, resulting in higher utilization of the internal space of the loudspeaker and improved driving force of the voice coils. Multiple voice coils are symmetrically or circumferentially uniformly distributed, and multiple voice coils are simultaneously connected to the balance bracket. The interaction between the balance bracket and the guide rail allows the multiple voice coils to vibrate symmetrically and maintain consistent vibration, reducing the problem of voice coil polarization. The guide rail can limit the movement direction of the balance bracket, thereby ensuring that the voice coils can only move in the vertical direction, also solving the problem of voice coil polarization.

[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0020] Figure 1 This is a schematic diagram of the structure of a loudspeaker according to an exemplary embodiment.

[0021] Figure 2 This is an exploded view of a loudspeaker from one perspective, according to an exemplary embodiment.

[0022] Figure 3 This is an exploded view of a loudspeaker from another perspective, according to an exemplary embodiment.

[0023] Figure 4 This is a schematic diagram illustrating the structure of a combination of multiple voice coils according to an exemplary embodiment.

[0024] Figure 5 This is a schematic diagram illustrating the structure of a combination of multiple voice coils, a balance bracket, and a guide rail according to an exemplary embodiment.

[0025] Figure 6 This is a schematic diagram of the structure of a magnetic circuit system according to an exemplary embodiment.

[0026] Figure 7 This is a schematic diagram illustrating a combination of multiple voice coils and magnetic circuit systems according to an exemplary embodiment. Detailed Implementation

[0027] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0028] like Figures 1 to 3 The image shows a schematic diagram of a loudspeaker according to an exemplary embodiment, as well as exploded views from two perspectives. The loudspeaker includes a vibration system and a magnetic circuit system. The vibration system includes a diaphragm 12 and a voice coil 11, with the voice coil 11 fixedly connected to the diaphragm 12.

[0029] The working principle of the loudspeaker is as follows: The magnetic circuit system is equipped with a magnetic gap 21, and the voice coil 11 of the vibration system is located in the magnetic gap 21. When an alternating electrical signal is transmitted from the external circuit to the voice coil 11 through the lead wire of the voice coil 11, the voice coil 11, which is supplied with the alternating electrical signal, forms an alternating magnetic field in the magnetic gap 21. The voice coil 11, which is alternately magnetized, vibrates under the action of the uniform magnetic field of the magnetic circuit system, causing the diaphragm 12 to vibrate up and down in the magnetic gap 21. The diaphragm 12 does work on the air, causing changes in the air density, forming a sound that can be heard by the human ear, and is emitted from the sound outlet of the loudspeaker.

[0030] In one embodiment, the vibration system includes multiple voice coils 11, which are symmetrically or circumferentially uniformly distributed. The voice coils 11 can be one or a combination of circular, square, or triangular shapes. The multiple voice coils 11 are spaced apart, meaning they are not in contact with each other, and a magnetic circuit system is provided between adjacent voice coils 11. This forms a loudspeaker with a multi-voice coil 11 and multi-magnetic circuit structure. By using multiple voice coils 11, the effective length of the voice coils 11 can be increased within the same area, resulting in higher utilization of the internal space of the loudspeaker. Simultaneously, the multiple magnetic circuit systems interacting with the multiple voice coils 11 can increase the driving force of the voice coils 11. The symmetrical or circumferentially uniform distribution of the multiple voice coils 11 allows them to vibrate symmetrically, effectively mitigating the segmented vibration of the diaphragm 12.

[0031] In this context, segmented vibration refers to the phenomenon where, when the voice coil 11 drives the diaphragm 12 to vibrate, at a given moment, the vibration transmitted from one voice coil 11 causes the diaphragm 12 to vibrate immediately at the part closest to the voice coil 11, while the parts farther from the voice coil 11 vibrate later, resulting in inconsistent vibration across different parts of the same diaphragm 12. Furthermore, the segmented vibration of the diaphragm 12 is related to its rigidity. When the rigidity of the diaphragm 12 is insufficient, different parts of the diaphragm 12 are prone to deformation or inconsistent vibration when driven by the voice coil 11. This distorts the sound and alters its original timbre.

[0032] The speaker of this disclosure will be described in detail below through exemplary embodiments.

[0033] Example 1

[0034] The voice coil 11 can be circular, and multiple voice coils 11 can be evenly distributed circumferentially. There can be three voice coils 11, all of equal size, connected at their centers to form a triangle. Alternatively, there can be four voice coils 11, connected at their centers to form a square. The number of circular voice coils 11 can be arbitrarily set according to design requirements.

[0035] Example 2

[0036] The voice coil 11 can be quadrilateral, which can be square or rhomboid. When the voice coil 11 is square, it can be either a square or a rectangle. When each voice coil 11 is square, multiple square voice coils 11 are evenly distributed circumferentially. When each voice coil 11 is rectangular, adjacent voice coils 11 are symmetrically distributed vertically or horizontally, meaning non-adjacent voice coils 11 are centrally symmetrical. When each voice coil 11 is rhomboid, adjacent voice coils 11 are symmetrically distributed vertically or horizontally, meaning non-adjacent voice coils 11 are centrally symmetrical.

[0037] In addition, when the voice coil 11 is a quadrilateral, the vertices of the four voice coils 11 near the center point can be connected to form a square, rectangle or rhombus.

[0038] Example 3

[0039] The voice coil 11 can be triangular. With the same area, the side length of a triangular voice coil 11 is greater than that of a square or circle, thus increasing the effective length of the coil. This not only optimizes the speaker's space to accommodate smaller terminal devices, but the increased effective length also increases the magnetic field strength of the voice coil 11 after energization, thereby increasing the driving force of the voice coil 11, resulting in better acoustic performance and improved electrical-to-sound energy conversion efficiency.

[0040] Specifically, there can be two triangular voice coils 11. For example, the voice coils 11 can be shaped like two isosceles right triangles, and the two triangular voice coils 11 can be centrally symmetrically distributed. In this case, the bases of the two triangular voice coils 11 are opposite each other, and the apex angles are set outwards. The two triangular voice coils 11 can be combined to form a square.

[0041] There can be three triangular voice coils 11, evenly distributed circumferentially. In this case, the vertices of the three triangular voice coils 11 are opposite each other, and their bases face outwards. The three triangular voice coils 11 have the same shape and area and can be combined to form an equilateral triangle.

[0042] There can be four triangular voice coils 11. When the four triangles are of the same shape and size, they can be evenly distributed circumferentially. All four triangles are right-angled triangles with their vertices facing each other and their bases facing outwards. The two opposite right-angled triangles can be isosceles or isosceles. When the two opposite right-angled triangles are isosceles, the four voice coils 11 of the same shape and size can be combined to form a square. When the two opposite right-angled triangles are isosceles, the four voice coils 11 of the same shape and size can be combined to form a rhombus.

[0043] When the four triangles are of different sizes, such as Figure 4As shown, they can be centrally symmetrically distributed. Specifically, the two opposing triangular voice coils 11 are centrally symmetrically distributed. All four triangles are isosceles triangles, and the two opposing triangular voice coils 11 have the same shape and size and are centrally symmetrical. The apex angles of the two opposing triangles are obtuse, and the apex angles of the other two opposing triangles are acute.

[0044] When there are four triangular voice coils 11, regardless of whether the triangular voice coils 11 are circumferentially uniformly distributed or centrally symmetrically distributed, the four triangular voice coils 11 are positioned with their apexes facing each other and their bases facing outwards, and the four triangles can be combined to form a rectangle. There are two intersecting gaps between the four voice coils 11. The intersection of the two intersecting gaps is the center point of the four voice coils 11.

[0045] It should be noted that the shape, number, and arrangement of the voice coils 11 described above are exemplary and not intended to limit the scope of protection of this application. For example, when four voice coils 11 are provided, two of them can be triangular, and the other two can be quadrilaterals or circles. The two triangles are centrally symmetrical, and the two quadrilaterals or two circles are centrally symmetrical. Alternatively, two voice coils 11 can be quadrilaterals, and the other two can be circles, with the two squares being centrally symmetrical and the two circles being centrally symmetrical. Therefore, when there are four voice coils 11, it is only necessary to ensure that the combination of multiple voice coils 11 results in a centrally symmetrical portion. Therefore, no specific limitations are made on the shape and number combination of the voice coils 11 here.

[0046] Furthermore, as described above, the vibration system includes a voice coil 11 and a diaphragm 12. In this disclosure, the vibration system includes multiple voice coils 11 and a diaphragm 12. That is, multiple voice coils 11 are simultaneously fixedly abutted against the diaphragm 12. In this way, not only can the stiffness of the diaphragm 12 be increased and the deformation of the diaphragm 12 during vibration be reduced, but the problem of high-frequency segmented vibration of the diaphragm 12 can also be effectively alleviated.

[0047] Furthermore, the effective contact area between the voice coil 11 and the diaphragm 12 can be increased. Multiple voice coils 11, symmetrically or uniformly distributed circumferentially, make the entire diaphragm 12 more uniformly driven, effectively mitigating the problem of high-frequency segmentation vibration of the diaphragm 12. In addition, the center of mass of the vibrating system can be shifted towards the vibration center, reducing polarization phenomena caused by uneven mass distribution in the vibrating system, thereby improving the acoustic quality of the loudspeaker. Multiple voice coils 11 simultaneously driving the diaphragm 12 increases the driving force of the voice coils 11, resulting in better acoustic performance and improved electrical-to-sound energy conversion efficiency.

[0048] Furthermore, as can be seen from the embodiments listed in Embodiments 1, 2, and 3 above, Figure 4The voice coils 11 shown have small gaps between them, and the multiple voice coils 11 are arranged closely and fixedly abut against the diaphragm 12. This increases the utilization rate of the magnetic field of the voice coil 11 and increases the driving force of the voice coil 11.

[0049] Furthermore, the voice coil 11 is made of enameled wire. That is, the metal conductor is covered with an insulating material, and the metal conductor can be made of copper. Each voice coil 11 has a lead, which includes an input end and an output end. The input end of the lead can introduce an alternating electrical signal into the voice coil 11, and the output end allows the voice coil 11 to form an alternating circuit. In this way, the voice coil 11 generates an alternating magnetic field. The alternating magnetic field vibrates under the action of the uniform magnetic field of the magnetic circuit system, thereby driving the diaphragm 12 to vibrate and produce sound.

[0050] In one embodiment, the diaphragm 12 includes a dome 121 and a folded ring 122. The dome 121 is a rigid metal plate structure that is not prone to elastic deformation, thereby mitigating the problem of segmented vibration of the diaphragm 12. The folded ring 122 is made of an elastomer; in one embodiment, the folded ring 122 may be made of a multilayer resin material or a silicone rubber material. Thus, the diaphragm 12 of this disclosure has a uniform thickness, good transition with the rigid dome 121, is less prone to distortion, and has high sensitivity.

[0051] Furthermore, the surround 122 includes a surround portion 1221 and a fixing portion 1222. The surround portion 1221 is an annular structure surrounding the dome 121. The surround portion 1221 may be recessed toward the voice coil 11 or protrude away from the voice coil 11. The surround portion 1221 of the surround 122 can undergo elastic deformation when the voice coil 11 drives the dome 121 of the diaphragm 12 to vibrate. The fixing portion 1222 of the surround 122 is used to fix the diaphragm 12 to other structures of the loudspeaker.

[0052] Furthermore, multiple voice coils 11 abut against the dome 121 of the diaphragm 12. The multiple voice coils 11 and the diaphragm 12 can be in direct contact or indirectly contacted through structures such as gaskets. Regardless of whether the multiple voice coils 11 and the dome 121 are in direct or indirect contact, the multiple voice coils 11 are fixedly connected to the dome 121.

[0053] This not only increases the stiffness of the diaphragm 12 and reduces its deformation during vibration, effectively mitigating the problem of high-frequency segmentation vibration of the diaphragm 12, but also increases the effective contact area between the voice coil 11 and the diaphragm 12. The symmetrical or circumferentially uniform distribution of multiple voice coils 11 makes the entire diaphragm 12 more uniformly driven, further mitigating the problem of high-frequency segmentation vibration of the diaphragm 12. Furthermore, it shifts the center of mass of the vibrating system towards the vibration center, reducing polarization caused by uneven mass distribution and thus improving the acoustic quality of the loudspeaker. The simultaneous driving of the diaphragm 12 by multiple voice coils 11 increases the driving force of the voice coils 11, resulting in better acoustic performance and improved electrical-to-sound energy conversion efficiency.

[0054] In one embodiment, the speaker further includes an auxiliary system. The auxiliary system includes a balance bracket 31 and a guide rail 32. Figure 3 As shown, a balance bracket 31 located at the center of multiple voice coils is used to connect the voice coils 11, and the extension direction of the guide rail 32 is consistent with the vibration direction of the voice coils 11. The guide rail 32 cooperates with the balance bracket 31, and the balance bracket 31 can move along the extension direction of the guide rail 32. The guide rail 32 limits the movement trajectory of the balance bracket 31, so that the vibration of the multiple voice coils 11 is kept consistent.

[0055] Specifically, a vibration system has a spatial center of vibration. Ideally, the center of mass of the vibration system coincides with the vibration center, and the resultant torque of the center of mass relative to the vibration center approaches zero. However, due to issues such as the design or manufacturing process of the voice coil 11, there may be uneven mass distribution of the voice coil 11, which will cause the center of mass of the vibration system to deviate from the vibration center.

[0056] Especially when multiple voice coils 11 are used, they are simultaneously connected to the diaphragm 12 and vibrate at the same time. If the amplitudes of the multiple voice coils 11 are inconsistent, it will cause polarization in the vibration system, resulting in increased distortion. When the polarization is severe, the voice coils 11 rub against the magnetic circuit structure, seriously affecting the music playback effect. However, this disclosure, by setting a balance bracket 31 and a guide rail 32, can ensure that the vibration of multiple voice coils 11 is consistent when multiple voice coils 11 are used, thus avoiding the distortion problem caused by polarization in the vibration system.

[0057] Furthermore, the balance bracket 31 is made of an insulating material, and the guide rail 32 can also be made of an insulating material. In one embodiment, there can be one balance bracket and one guide rail 32. That is, a balance bracket 31 is sleeved on the outside of a guide rail 32, and the two can slide together along the extension direction of the guide rail 32 (i.e., the vibration direction of the voice coil 11). The center of the guide rail 32 coincides with that of the balance bracket 31, the extension direction of the guide rail 32 is consistent with the vibration direction of the voice coil 11, and one balance bracket 31 is connected to multiple voice coils 11 simultaneously. In this way, it can be ensured that when multiple coils vibrate, their vibration is consistent and they can only move vertically along the direction of the guide rail 32.

[0058] The support system for the auxiliary system will now be described in detail with reference to the above embodiments.

[0059] In Example 1, the voice coil 11 is circular.

[0060] There can be three or four voice coils 11, evenly distributed circumferentially. In this case, the balance bracket 31 is located at the center of the multiple voice coils 11. Specifically, when the voice coils 11 are circular and there are three, the center point of the balance bracket 31 or the guide rail 32 can coincide with the center of the triangle formed by connecting the centers of the three circular voice coils. Thus, the balance bracket 31, located at the center of the three circular voice coils 11, keeps the three voice coils 11 balanced.

[0061] At this time, the balance support 31 can be triangular or circular. When the balance support 31 is triangular, each corner of the triangular balance support 31 is connected to the side of the circular voice coil 11. When the balance support 31 is circular, the circular balance support 31 is externally tangent to all three circular voice coils 11.

[0062] When there are four circular voice coils 11, the center point of the balance bracket 31 or the guide rail 32 can coincide with the center point of the quadrilateral formed by connecting the centers of the four circles. In this way, the balance bracket 31 located at the center of the four voice coils 11 keeps the four voice coils 11 in balance.

[0063] At this time, the balance support 31 can be quadrilateral or circular. When the balance support 31 is quadrilateral, each corner of the quadrilateral balance support 31 can be connected to a side of the circular voice coil 11, or each side can be tangent to the circular voice coil 11. When the balance support 31 is circular, the circular balance support 31 is tangent to the four circular voice coils 11.

[0064] In the second embodiment, the voice coil 11 is quadrilateral.

[0065] When the voice coil 11 is square or rectangular, the center point of the balance bracket 31 or the guide rail 32 can coincide with the center point of the quadrilateral formed by connecting the centers of the four square voice coils 11. In this way, the four voice coils 11 are balanced by being located at the center of the four voice coils 11.

[0066] As described above, when the voice coil 11 is a quadrilateral, connecting the vertices of the four voice coils 11 near their center point can form a square, rectangle, or rhombus. Correspondingly, the outer contour of the balance bracket 31 can be square, rectangular, or rhombus. Specifically, when the four voice coils 11 are squares, the balance bracket 31 is a square. When the four voice coils 11 are rectangles, the balance bracket 31 is a rectangle. When the four voice coils 11 are rhombuses, the balance bracket 31 is a rhombus. The four corners of the balance bracket 31 are connected to the corners of the four voice coils 11. Alternatively, the four sides of the balance bracket 31 can also be connected to the corners of the four voice coils 11. No specific limitation is made here.

[0067] In addition, the balance bracket 31 can also be circular or elliptical. When the four voice coils 11 are square, the balance bracket 31 is circular and connected to the corners of the four balance brackets 31. When the four voice coils 11 are rectangular or rhomboid, the balance bracket 31 is elliptical and connected to the corners of the four balance brackets 31.

[0068] In Example 3, the voice coil 11 is triangular.

[0069] When there are two voice coils 11, the center point of the balance bracket 31 or the guide rail 32 coincides with the center point of the two voice coils 11. In this way, the balance bracket 31 can be connected to both voice coils 11 at the same time, and the balance bracket 31 located at the center of the two voice coils 11 keeps the two voice coils 11 in balance.

[0070] At this point, the balance support 31 can be circular or quadrilateral. When the balance support 31 is circular, it is tangent to the bases of the two triangular voice coils 11. When the balance support 31 is quadrilateral, either the two centrally symmetrical sides of the balance support 31 are connected to the bases of the two triangular voice coils 11, or the two symmetrical angles of the balance support 31 are connected to the bases of the two triangular voice coils 11.

[0071] When there are three voice coils 11, the three voice coils 11 have the same structure, shape, and size. The triangular voice coils 11 are evenly distributed around the circumference, and the vertices of the three voice coils 11 are opposite each other, with their bases facing outwards. The line connecting the vertices of the three triangular voice coils 11 forms a triangle. Therefore, the center point of the balance bracket 31 or the guide rail 32 coincides with the center point of the triangle formed by the lines connecting the vertices of the three voice coils 11. In this way, the balance bracket 31 can be connected to all three voice coils 11 simultaneously. The balance bracket 31, located at the center of the three voice coils 11, keeps the three voice coils 11 in balance, ensuring that their vibration movements are consistent.

[0072] At this time, the balance support 31 can be triangular or circular. When the balance support 31 is triangular, each corner of the triangular balance support 31 can be connected to the apex of the triangular voice coil 11, or each side can be connected to the apex of the triangular voice coil 11. When the balance support 31 is circular, the circular balance support 31 is connected to the apex of the triangular voice coil 11.

[0073] When there are four voice coils 11, the four voice coils 11 are identical in shape, size, and structure, or they can be two opposite voice coils 11 that are centrally symmetrical. The apex corners of the four voice coils 11 near the center point can be connected to form a square, rectangle, or rhombus. Correspondingly, the outer contour of the balance bracket 31 is square, rectangular, or rhomboid. In this case, the four corners of the balance bracket 31 are connected to the apex corners of the four voice coils 11, respectively. In addition, the balance bracket 31 can also be circular or elliptical. The circular or elliptical sides of the balance bracket 31 are connected to the apex corners of the four voice coils 11, which is not specifically limited here.

[0074] When the four triangular voice coils 11 are of the same shape and size and are evenly distributed in the circumference, the apex of the four voice coils 11 near the center point are connected to form a square; at this time, the outer contour of the balance support 31 is a square, a circle, or an ellipse. When the two opposite voice coils 11 are centrally symmetrical, the outer contour of the balance support 31 is a rectangle or an ellipse.

[0075] When the four triangular voice coils 11 have different shapes and sizes, the two opposite voice coils 11 are centrally symmetrical. The apex angles of the four voice coils 11 near the center point are connected to form a rhombus, and the outer contour of the balance bracket 31 is then rhomboid (e.g., ...). Figure 5 (as shown) or elliptical.

[0076] It should be noted that the structure of the balance bracket 31 listed in the above embodiments is merely exemplary and is not intended to limit the scope of protection of this disclosure. One balance bracket 31 is used to connect multiple voice coils 11, keeping the multiple voice coils 11 balanced and vibrating in a consistent manner. Therefore, when the balance bracket 31 is simultaneously connected to multiple voice coils 11, the balance bracket 31 can be any centrally symmetrical shape.

[0077] In one embodiment, such as Figure 6 and Figure 7 As shown, the magnetic circuit system includes an outer magnetic circuit 22, an inner magnetic circuit 23, and a central magnetic circuit 24. The outer magnetic circuit 22, the central magnetic circuit 24, and the inner magnetic circuit 23 are all permanent magnets. The following description uses the embodiment of Example 3, in which four triangular voice coils 11 are provided, with two opposing voice coils 11 arranged symmetrically at their centers.

[0078] like Figure 6As shown, the magnetic circuit system includes an outer magnetic circuit 22 and an inner magnetic circuit 23. There are four outer magnetic circuits 22, four inner magnetic circuits 23, and four central magnetic circuits 24.

[0079] Four outer magnetic circuits 22 are respectively positioned above, below, to the left, and to the right of the vibration system. The four outer magnetic circuits 22 enclose a rectangular space.

[0080] Four inner magnetic circuits 23 are arranged within a square space of four outer magnetic circuits 22. Specifically, the rectangular space has two hypotenuses, and two inner magnetic circuits 23 are arranged on each hypotenuse. The two inner magnetic circuits 23 are spaced apart. The intersection of the two intersecting hypotenuses is the center point of the four voice coils 11. The two inner magnetic circuits 23 located on the same hypotenuse are symmetrical about the center point.

[0081] Then by Figure 6 As shown, two adjacent inner magnetic circuits 23 and one of the outer magnetic circuits 22 form a triangular shape. Thus, the four inner magnetic circuits 23 divide the square space enclosed by the four outer magnetic circuits 22 into four triangles. Each triangle contains a central magnetic circuit 24. The central magnetic circuit 24 is triangular, and its shape corresponds to the shape of the voice coil 11.

[0082] When the central magnetic circuit 24 is set within the triangular space enclosed by the outer magnetic circuit 22 and the inner magnetic circuit 23, the outer edge of the central magnetic circuit 24 is separated from the outer magnetic circuit 22 by a certain gap (i.e., the first gap), and the inner edge of the central magnetic circuit 24 is separated from the inner magnetic circuit 23 by a certain gap (i.e., the second gap). Finally, the gaps between the central magnetic circuit 24 and the outer magnetic circuit 22 and the inner magnetic circuit 23 form a complete magnetic gap 21.

[0083] like Figure 7 As shown, four triangular voice coils 11 are disposed within the magnetic gaps 21. The four outer magnetic circuits 22, the four inner magnetic circuits 23, and the four central magnetic circuits 24 together form four triangular magnetic gaps 21, which can accommodate the four triangular voice coils 11.

[0084] It should be noted that when the triangular voice coil 11 is placed in the magnetic gap 21, the triangular voice coil 11 does not contact the outer magnetic circuit 22, the inner magnetic circuit 23 and the central magnetic circuit 24.

[0085] In one embodiment, such as Figure 2 and Figure 3 As shown, in addition to the balance bracket 31 and guide rail 32, the auxiliary system also includes a rear shell 33, a frame 34 and a side frame 35.

[0086] A magnetic circuit system and a vibration system are sandwiched between the rear shell 33 and the frame 34. The magnetic circuit system is fixed to the rear shell 33, that is, the outer magnetic circuit 22, the inner magnetic circuit 23, and the central magnetic circuit 24 are all fixed to the rear shell 33. In addition, one end of the guide rail 32 is also fixed to the rear shell 33.

[0087] The frame 34 has a square, hollow structure and can be made of metal to form a metal frame. The four sides of the frame 34 are fixed to the outer magnetic circuit 22, while the middle part does not contact the inner magnetic circuit 23 and the central magnetic circuit 24. That is, one side of the outer magnetic circuit 22 is fixed to the back shell 33, and the other side is fixed to the frame 34.

[0088] In one embodiment, such as Figures 1 to 3 As shown, the frame 35 is located between the frame 34 and the diaphragm 12. One side of the frame 35 is fixedly connected to the frame 34, and the other side of the frame 35 is connected to the fixing part 1222 of the folded ring 122 of the diaphragm 12. In this embodiment, the thickness of the voice coil 11 is less than the overall thickness of the magnetic circuit system, the frame 34, and the frame 35, so that after one end of the voice coil 11 is fixedly connected to the diaphragm 12, the other end of the voice coil 11 is suspended, that is, it does not contact the back shell 33, leaving enough space for the vibration of the voice coil 11.

[0089] In one embodiment, the rear housing 33 is provided with multiple latches 331. The rear housing 33 is fixed to the frame 34 and the side frame 35 by the latches 331, thereby fixing the vibration system and magnetic circuit system located within the rear housing 33, frame 34, and side frame 35, making the speaker structure more stable. Specifically, the rear housing 33 is provided with four latches 331, and the frame 34 and side frame 35 are provided with slots 341 at corresponding positions of the latches 331. The latches 331 of the rear housing 33 engage with the slots 341, making the frame 34 and side frame 35 detachably fixed to the rear housing 33. Therefore, the speaker of this disclosure is easy to disassemble, which is beneficial for the inspection and replacement of the vibration system and magnetic circuit system.

[0090] In one embodiment, the auxiliary system further includes a flexible printed circuit (FPC) 36, which is a highly reliable and extremely flexible printed circuit board made of polyimide or polyester film as a substrate. It features high wiring density, light weight, thinness, and good bendability.

[0091] There are two flexible circuit boards 36, which have the same structural shape and are symmetrically arranged on the left and right sides of the frame 34. The flexible circuit boards 36 are located on the side of the frame 34 closer to the rear shell 33. One of the flexible circuit boards 36 can be de-energized, forming a symmetrical arrangement with the other flexible circuit board 36.

[0092] The energized flexible circuit board 36 is electrically connected to the input and output terminals of four triangular voice coils 11. The input terminal of each triangular voice coil 11 is connected to the positive terminal of the flexible circuit board 36, and the output terminal is connected to the negative terminal of the flexible circuit board 36. The four triangular voice coils 11 are connected in parallel, thus the flexible circuit board 36 has four pairs of positive and negative terminals. An electrical circuit is formed between the flexible circuit board 36 and the voice coils 11 to receive the audio electrical signals (analog or digital signals) input from the flexible circuit board 36 to the voice coils 11. In this way, the four voice coils 11 are driven simultaneously by the four pairs of audio electrical signals.

[0093] In this embodiment, the lead-in and lead-out ends of the voice coil 11 can be wound around the balance bracket 31, and then connected to the positive or negative terminal of the flexible circuit board 36 through the balance bracket 31.

[0094] In one embodiment, the auxiliary system further includes an auxiliary diaphragm 37. Two auxiliary diaphragms 37 are provided, symmetrically disposed on the flexible circuit board 36. Each auxiliary diaphragm 37 includes an edge and an arc-shaped groove. The edge is adhered and fixed to the flexible circuit board 36. The arc-shaped groove protrudes from the flexible circuit board 36 towards the rear housing 33 and abuts against it. The auxiliary diaphragm 37 is made of an elastomer. Like the surround 122 of the diaphragm 12, the auxiliary diaphragm 37 can be made of multilayer resin material or silicone rubber material. The auxiliary diaphragm 37 can undergo elastic deformation when the voice coil 11 drives the dome 121 of the diaphragm 12 to vibrate. This balances the vibration of the entire loudspeaker and alleviates the problems of split vibration of the diaphragm 12 and polarization of the voice coil 11.

[0095] In summary, through the above structural design, this disclosure has the following advantages: multiple voice coils 11 are simultaneously fixedly abutted against the diaphragm 12. This not only increases the stiffness of the diaphragm 12 and reduces its deformation during vibration, effectively alleviating the problem of high-frequency segmented vibration of the diaphragm 12, but also increases the effective contact area between the voice coils 11 and the diaphragm 12. The symmetrical or circumferentially uniform distribution of the multiple voice coils 11 makes the entire diaphragm 12 more uniformly driven, further effectively alleviating the problem of high-frequency segmented vibration of the diaphragm 12. Furthermore, it shifts the center of mass of the vibrating system towards the vibration center, reducing polarization phenomena caused by uneven mass distribution in the vibrating system, thereby improving the acoustic quality of the loudspeaker. The simultaneous driving of the diaphragm 12 by multiple voice coils 11 increases the driving force of the voice coils 11, resulting in better acoustic performance and improved electrical energy to sound energy conversion efficiency.

[0096] The structural design of the auxiliary structure, including the rear shell 33, frame 34, and side border 35, reduces the stacking of the speaker in the thickness direction, making the speaker structure more compact and lightweight. This allows it to adapt to the gradually decreasing space and volume inside terminal devices.

[0097] Based on the same concept, this disclosure also provides an electronic device, including the aforementioned speaker. In one embodiment, the miniature speaker can be applied to a terminal device. The terminal device can be a mobile phone, computer, digital broadcasting terminal, messaging device, game console, tablet device, medical device, fitness equipment, personal digital assistant, translator, watch, bracelet, or other wearable device.

[0098] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments relating to the speaker, and will not be elaborated upon here.

[0099] It is understood that the terminal device provided in this disclosure includes hardware structures and / or software modules corresponding to each function in order to achieve the above-mentioned functions. In conjunction with the units and algorithm steps of the various examples disclosed in this disclosure, this disclosure can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed by hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the technical solutions of this disclosure.

[0100] It is understood that in this disclosure, "multiple" refers to two or more, and other quantifiers are similar. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. The singular forms "a," "the," and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0101] It is further understood that the terms "first," "second," etc., are used to describe various types of information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another, and do not indicate a specific order or degree of importance. In fact, the expressions "first," "second," etc., are completely interchangeable. For example, without departing from the scope of this disclosure, first information can also be referred to as second information, and similarly, second information can also be referred to as first information.

[0102] It is further understood that the terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation.

[0103] It can be further understood that, unless otherwise specified, "connection" includes both direct connections where no other components exist between the two parties and indirect connections where other components exist between them.

[0104] It is further understood that although operations are described in a specific order in the accompanying drawings in the embodiments of this disclosure, this should not be construed as requiring these operations to be performed in the specific order or serial order shown, or requiring all of the shown operations to be performed to obtain the desired result. In certain environments, multitasking and parallel processing may be advantageous.

[0105] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following scope of claims.

[0106] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A loudspeaker, characterized in that, The loudspeaker includes: A vibration system, comprising multiple voice coils, wherein the multiple voice coils are symmetrically distributed or circumferentially uniformly distributed; A magnetic circuit system is provided with a magnetic gap, and the voice coil is located in the magnetic gap; and, The auxiliary system includes: A balance bracket is used to connect multiple voice coils so that the vibration of the multiple voice coils is synchronized; The guide rail cooperates with the balance bracket, and the extension direction of the guide rail is consistent with the vibration direction of the voice coil; The voice coil moves up and down under force within the magnetic gap of the magnetic circuit system, driving the balance bracket to reciprocate along the guide rail. The guide rail limits the movement trajectory of the balance bracket, ensuring that the vibration of the multiple voice coils remains consistent.

2. The loudspeaker according to claim 1, characterized in that, The voice coil is triangular.

3. The loudspeaker according to claim 2, characterized in that, The number of voice coils is four, and the four voice coils are combined to form a quadrilateral, with the two opposite voice coils being centrally symmetrically distributed.

4. The loudspeaker according to claim 3, characterized in that, The guide rail coincides with the center of symmetry of the voice coil, and the balance bracket is sleeved on the outside of the guide rail.

5. The loudspeaker according to claim 4, characterized in that, The balance bracket is quadrilateral, and its four corners are connected to the apex corners of the four voice coils, respectively.

6. The loudspeaker according to claim 3, characterized in that, The magnetic circuit system includes: The four central magnetic circuits are arranged in a triangle, with one outer side and two inner sides; Four outer magnetic circuits are disposed outside the outer edge of the central magnetic circuit, and are respectively spaced apart from the outer edge of each of the central magnetic circuits to form a first gap; Four inner magnetic circuits are arranged between the inner edges of two adjacent central magnetic circuits, and are spaced apart from the inner edges of the central magnetic circuits to form a second gap; The first gap and the second gap together constitute the magnetic gap.

7. The loudspeaker according to claim 6, characterized in that, The vibration system also includes a diaphragm, the dome of which abuts against the voice coil.

8. The loudspeaker according to claim 7, characterized in that, The auxiliary system also includes: The magnetic circuit system is fixed to the rear housing; The frame, wherein the outer side of the magnetic circuit of the magnetic circuit system away from the rear shell is abutted and fixed to the frame; The frame has one side abutting against the frame and the other side abutting against the fold of the diaphragm.

9. The loudspeaker according to claim 8, characterized in that, The auxiliary system also includes: Two flexible circuit boards are symmetrically arranged on one side of the frame near the rear shell.

10. The loudspeaker according to claim 9, characterized in that, The flexible circuit board has an auxiliary film on the side near the rear shell, the auxiliary film comprising: The edge is attached to the flexible circuit board; An arc-shaped groove abuts against the rear shell, and the arc-shaped groove is capable of elastic deformation.

11. An electronic device, characterized in that, Includes the loudspeaker as described in any one of claims 1-10.

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