Speaker and electronic device

Abstract

The embodiment of the application discloses a loudspeaker and electronic equipment, which is characterized in that the first magnetic part and the second magnetic part are arranged on the two sides of the center magnetic conducting part respectively, and the first magnetic part is arranged on the inner side of the center magnetic conducting part through the first accommodating groove, so as to increase the magnetic field intensity in the center magnetic conducting part, and further improve the magnetic flux density between the center magnetic conducting part and the outer magnetic part. Thus, on the one hand, the first magnetic part directly acts on the outer magnetic part, which leads to the uneven distribution of the magnetic lines of force. On the other hand, in the processing of the center magnetic conducting part, the relative positions of the first magnetic part, the center magnetic conducting part and the second magnetic part in the horizontal direction can be better controlled by controlling the position of the first accommodating groove on the center magnetic conducting part, so as to further ensure that the width of the magnetic gap in each direction is consistent, so that the movement of the voice coil is more stable, and the sound quality of the electronic equipment is improved.

Description

Technical Field

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

[0002] Loudspeakers convert electrical signals into sound signals. In electrodynamic loudspeakers, the voice coil reciprocates under the influence of the Ampere force in a magnetic field. Therefore, the distribution of the magnetic field within the magnetic gap significantly affects the voice coil's motion. Optimizing the magnetic field distribution within the magnetic gap to improve the stress on the voice coil becomes a problem that needs to be solved. Summary of the Invention

[0003] In view of this, embodiments of the present invention provide a loudspeaker and an electronic device, which utilizes a first receiving groove disposed on a central magnetic conductor to cover the side and bottom surfaces of a first magnetic component, thereby increasing the magnetic flux density in the magnetic gap and making the magnetic field distribution more uniform.

[0004] According to a first aspect of the present invention, a loudspeaker is provided, comprising: Voice coil; Shell section; The diaphragm, the housing portion is fixedly connected to the outer edge of the diaphragm, and the end face of the voice coil is fixedly connected to the inner side of the outer edge of the diaphragm; and An outer magnetic part and a central magnetic part are formed, and a magnetic gap is formed between the outer magnetic part and the central magnetic part. The voice coil is at least partially located in the magnetic gap. The central magnetic part includes a central magnetic conductor, a first magnetic conductor, and a second magnetic conductor stacked together. The central magnetic conductor is spaced between the first magnetic conductor and the second magnetic conductor. The central magnetic conductor includes a surrounding body and a central body. The surrounding body extends circumferentially along the central body and forms a first receiving groove with the central body. The first magnetic conductor is installed in the first receiving groove and the side of the first magnetic conductor corresponds to at least a portion of the inner sidewall of the first receiving groove.

[0005] Furthermore, the speaker also includes: The first receiving groove is located in the center of the central magnetic conductor and faces the diaphragm. The first magnetic conductor is a plate-shaped structure, and the surrounding body covers the edge of the plate-shaped structure.

[0006] Furthermore, the surface of the plate-like structure is a rounded rectangle; The shape of the first receiving groove is adapted to a rounded rectangle, and the depth of the first receiving groove is the same as the thickness of the plate-like structure.

[0007] Furthermore, there are four outer magnetic parts, each corresponding to a straight side of the rounded rectangle.

[0008] Furthermore, the central body is a central plate, and the side of the central plate facing the second magnetic element is flush with the side of the surrounding body facing the second magnetic element. The surround has inner and outer walls that are opposite to each other, with the outer wall aligned with the side of the second magnetic element.

[0009] Furthermore, the cross-section along the extension direction of the surrounding body is a rectangle with unequal side lengths, and the longer side of the rectangle is connected to the central body.

[0010] Furthermore, the outer magnetic part includes a third magnetic element and an outer magnetic conductor stacked together; The surrounding body simultaneously forms a magnetic gap with the regions on the opposite sides of the third magnetic component and the outer magnetic conductor.

[0011] Furthermore, the speaker also includes: A magnetic base plate, with four outer magnetic parts and a second magnetic component attached to the same side of the magnetic base plate; The housing includes multiple mounting platforms and windows. The mounting platforms protrude towards the same side, and a magnetic base plate is mounted on the top of the mounting platforms. The edge of the diaphragm is fixedly connected to the edge of the window.

[0012] Furthermore, there are four mounting platforms, each with an arc-shaped flow guide surface located on the side of the mounting platform and opposite to the central magnetic part. The outer magnetic part is provided with a flow guiding slope adjacent to the arc-shaped flow guiding surface. The flow guiding slope is located laterally to the outer magnetic part, and each flow guiding slope extends toward the adjacent arc-shaped flow guiding surface.

[0013] Furthermore, the housing includes four fixing plates corresponding to the four outer magnetic parts. The side of each outer magnetic part away from the central magnetic part is fixed to the fixing plate. Each mounting platform is spaced between two adjacent fixing plates and corresponds to the central magnetic part through the gap between two adjacent outer magnetic parts.

[0014] Furthermore, the central body is a central plate, and the surrounding body forms a second receiving groove around the central plate, the orientation of the second receiving groove being opposite to the orientation of the first receiving groove; The second magnetic element is installed in the second receiving groove and the side of the second magnetic element corresponds to at least a portion of the inner sidewall of the second receiving groove.

[0015] Furthermore, the bottom surface of the second receiving groove is parallel to the bottom surface of the first receiving groove; In the thickness direction of the center plate, the sidewalls of the first receiving groove and the second receiving groove coincide, and the sidewalls of the first receiving groove and the second receiving groove are both perpendicular to the bottom surface of the first receiving groove. The second magnetic component is a plate-shaped component, with the surrounding body covering the edge of the plate-shaped component.

[0016] Furthermore, the surround has a mounting end face that surrounds the second receiving groove; The speaker also includes: A magnetic base plate is formed, with the central magnetic part mounted on it. The mounting end face and the second magnetic component are simultaneously attached to the magnetic base plate.

[0017] Furthermore, the depth of the first receiving groove is greater than the depth of the second receiving groove; During the movement of the voice coil, the first magnetic element and the central body remain in correspondence with the voice coil.

[0018] In a second aspect, embodiments of the present invention also provide an electronic device comprising: The speaker mentioned in the first aspect above.

[0019] The speaker and electronic device of this invention have a first magnetic component and a second magnetic component respectively disposed on both sides of a central magnetic conductor. The first magnetic component is positioned inside the central magnetic conductor via a first receiving groove to increase the magnetic field strength within the central magnetic conductor, thereby improving the magnetic flux density between the central magnetic conductor and the outer magnetic portion. This avoids the first magnetic component directly applying its magnetic field to the outer magnetic portion, preventing uneven distribution of magnetic lines of force. Furthermore, during the manufacturing process of the central magnetic conductor, controlling the position of the first receiving groove on the central magnetic conductor allows for better control of the relative positions of the first, central, and second magnetic components in the horizontal direction. This further ensures consistent magnetic gap width in all directions, resulting in more stable voice coil movement and improved sound quality of the electronic device. Especially when the speaker operates at low frequencies, it significantly reduces total harmonic distortion. Attached Figure Description

[0020] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the invention with reference to the accompanying drawings, in which: Figure 1 This is a structural schematic diagram of one side of the speaker according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the other side of the speaker in an embodiment of the present invention; Figure 3 This is an exploded schematic diagram of a loudspeaker according to an embodiment of the present invention; Figure 4 This is a cross-sectional schematic diagram of a loudspeaker in some embodiments of the present invention; Figure 5 This is a schematic diagram of the magnetic field line distribution in the magnetic gap according to an embodiment of the present invention; Figure 6 This is a cross-sectional schematic diagram of the loudspeaker in some other embodiments of the present invention; Figure 7 This is a cross-sectional schematic diagram of the loudspeaker in some other embodiments of the present invention; Figure 8This is a schematic diagram of airflow in a loudspeaker according to an embodiment of the present invention; Figure 9 This is a simulation test diagram of the magnetic flux density and displacement change of the voice coil according to an embodiment of the present invention; Figure 10 This is a simulation test diagram of the total harmonic distortion of the loudspeaker according to an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures: 1-Central magnetic part; 11-First magnetic component; 12-Second magnetic component; 13-Central magnetic conductor; 131-Surrounding body; 1311-Inner wall; 1312-Outer wall; 1313-Mounting end face; 132-Central body; 133-First receiving groove; 134-Second receiving groove; 2-Outer magnetic part; 21-Third magnetic component; 22-External magnetic conductor; 23-Guiding slope; 3-Magnetic gap; 4-Diaphragm; 5-Magnetic base plate; 6-Shell section; 61-Mounting platform; 611-Mounting recess; 612-Arc-shaped guide surface; 62-Window; 63-Connecting part; 64-Fixing plate; 7-Voice coil. Detailed Implementation

[0022] The present invention is described below based on embodiments, but the invention is not limited to these embodiments. In the detailed description of the invention below, certain specific details are described in detail. Those skilled in the art will fully understand the invention even without these details. To avoid obscuring the essence of the invention, well-known methods, processes, flows, elements, and circuits are not described in detail.

[0023] Furthermore, those skilled in the art should understand that the accompanying drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale.

[0024] Unless the context explicitly requires it, words such as "including" or "contains" throughout the application should be interpreted as including rather than exclusive or exhaustive; that is, meaning "including but not limited to".

[0025] In the description of this invention, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0026] For ease of explanation, spatially related terms such as “inside,” “outside,” “below,” “below,” “lower,” “above,” “upper,” etc., are used herein to describe the relationship between one element or feature illustrated in the figure and another. It will be understood that spatially related terms may be intended to encompass different orientations of the device in use or operation besides those depicted in the figure. For example, if the device in the figure is flipped, an element described as “below” or “below” another element or feature would then be positioned “above” that other element or feature. Thus, the exemplified term “below” can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially related descriptive terms used herein should be interpreted accordingly.

[0027] Figure 1-2 This is a schematic diagram of the speaker's structure from different directions. The speaker in the diagram is roughly a block-shaped structure. The diaphragm 4 and the magnetic base plate 5 are located at the top and bottom of the speaker, respectively. The diaphragm 4 and the magnetic base plate 5 are fixed together by a housing portion 6. A connecting portion 63 is also provided on the housing portion 6, extending to one side of the housing portion 6. This connecting portion 63 facilitates the mounting of the speaker onto electronic devices, including but not limited to mobile phones, watches, or laptops.

[0028] Figure 3 This is a schematic diagram of a loudspeaker exploded. The central magnetic part 1 is located in the center, and four outer magnetic parts 2 are arranged around it.

[0029] Figures 4-7 This is a cross-sectional schematic diagram of a loudspeaker in different embodiments. Figure 5 and Figure 7 The arrows shown illustrate the distribution of some magnetic field lines in magnetic gap 3.

[0030] like Figure 1-3 As shown, the loudspeaker of this embodiment includes a voice coil 7, a housing portion 6, a diaphragm 4, and at least one outer magnetic portion 2 and a central magnetic portion 1. The housing portion 6 is fixedly connected to the outer edge of the diaphragm 4, and the end face of the voice coil 7 is fixedly connected to the inner side of the outer edge of the diaphragm 4. Referring again... Figure 4As shown, a magnetic gap 3 is formed between the central magnetic part 1 and the outer magnetic part 2, and the voice coil 7 is at least partially located in the magnetic gap 3. The central magnetic part 1 includes a central magnetic conductor 13, a first magnetic component 11 and a second magnetic component 12 stacked together. The central magnetic conductor 13 is located between the first magnetic component 11 and the second magnetic component 12. The central magnetic conductor 13 includes a surrounding body 131 and a central body 132. The surrounding body 131 extends circumferentially along the central body 132 and forms a first receiving groove 133 with the central body 132. The first magnetic component 11 is installed in the first receiving groove 133 and the side of the first magnetic component 11 corresponds to at least a portion of the inner sidewall of the first receiving groove 133, that is, the first magnetic component 11 is completely submerged in the first receiving groove 133.

[0031] Specifically, in this embodiment, the magnetic gap 3 can be formed between the central magnetic guide 13 and the outer magnetic part 2, and between the second magnetic member 12 and the outer magnetic part 2. For example... Figure 5 As shown, the magnetic flux density formed between the central magnetic conductor 13 and the outer magnetic part 2 is more compact. This means that the magnetic field generated by the first magnetic component 11 and the second magnetic component 12 is constrained by the central magnetic part 1 to the area near the top of the magnetic gap 3. This allows as many magnetic lines of force as possible to pass through the voice coil 7 during its up-and-down movement, thus keeping the Ampere force on the voice coil 7 stable during this process. In contrast, Figure 6 The central magnetic part 1 does not have a first receiving groove 133, compared to Figure 5 In the state shown, the magnetic force of the first magnetic element 11 will act directly on the outer magnetic part 2, so the magnetic lines of force in the magnetic gap 3 will become uneven.

[0032] During the machining of the first receiving groove 133 on the central magnetic conductor 13, the central magnetic conductor 13 can be clamped onto a CNC milling machine, and the first receiving groove 133 can be milled on the central magnetic conductor 13 using a milling cutter. This ensures the depth of the first receiving groove 133 and the positional accuracy of the first receiving groove 133 on the central magnetic conductor 13. When the first magnetic component 11 is installed in the first receiving groove 133, the positioning of the first magnetic component 11 can be achieved through the first receiving groove 133, thereby ensuring the relative positional accuracy between the first magnetic component 11 and the central magnetic conductor 13. In other words, compared to... Figure 6 The structure in which the first magnetic component 11', the second magnetic component 12', and the central magnetic conductive component 13' are stacked in sequence can reduce the assembly precision of the central magnetic part 1 by utilizing the first receiving groove 133.

[0033] Specifically, the first receiving slot 133 can face the top of the speaker (e.g., Figure 3 (As shown), it can also be configured to face the bottom of the speaker. Those skilled in the art can choose the specific arrangement direction based on actual usage requirements. Figure 9This is a simulation test diagram showing the changes in magnetic flux density and displacement when the first accommodating slot 133 is facing upwards. Curves I and II are respectively compared with... Figure 5 and Figure 6 The speaker's structure corresponds to this. The negative range on the horizontal axis represents the movement of the voice coil 7 towards the bottom of the speaker, while the positive range represents the movement of the voice coil 7 towards the top of the speaker. As can be seen in the diagram, the first receiving groove 133 of the central magnetic conductor 13 can reduce the rate of magnetic flux density decay during the upward movement of the voice coil 7, thereby ensuring the speaker's sound quality. Conversely, Figure 10 This is a simulation test graph for the total harmonic distortion (THD) of a loudspeaker. Curves I and II are also respectively... Figure 5 and Figure 6 The speaker's structure corresponds to the frequency of 400Hz indicated by the dashed line in the diagram. As can be seen in the diagram, when the speaker operates at low frequencies, the total harmonic distortion (THD) of curve I is significantly lower than that of curve II.

[0034] Optionally, the top of the first magnetic element 11 located within the first receiving groove 133 may be configured to be at the same height as or slightly lower than the top of the first receiving groove 133. This prevents the first magnetic element 11 from directly applying a magnetic field to the outer magnetic part 2.

[0035] In summary, in this embodiment, the loudspeaker has the first magnetic element 11 and the second magnetic element 12 respectively disposed on both sides of the central magnetic conductor 13. Simultaneously, the first magnetic element 11 is positioned inside the central magnetic conductor 13 via the first receiving groove 133 to increase the magnetic field strength within the central magnetic conductor 13, thereby improving the magnetic flux density between the central magnetic conductor 13 and the outer magnetic part 2. This avoids the first magnetic element 11 directly acting on the outer magnetic part 2, preventing uneven distribution of magnetic lines of force. Furthermore, during the manufacturing process of the central magnetic conductor 13, by controlling the position of the first receiving groove 133 on the central magnetic conductor 13, the relative positions of the first magnetic element 11, the central magnetic conductor 13, and the second magnetic element 12 in the horizontal direction can be better controlled. This further ensures that the width of the magnetic gap 3 is consistent in all directions, resulting in more stable voice coil movement and improved sound quality of the electronic device. Especially when the loudspeaker operates at low frequencies, it can significantly reduce total harmonic distortion.

[0036] In some implementations, such as Figure 2-3 As shown, the loudspeaker also includes a diaphragm 4. The first receiving groove 133 is located in the center of the central magnetic conductor 13 and faces the diaphragm 4. The first magnetic conductor 11 is a plate-shaped structure, and the edge of the plate-shaped structure abuts against the surround 131.

[0037] Specifically, the bottom surface of the plate-like structure is in contact with the bottom of the first receiving groove 133. The plate-like structure fills the entire first receiving groove 133, so that the first magnetic element 11 is stably connected to the central magnetic conductor 13, while increasing the volume of the first magnetic element 11 as much as possible to enhance the magnetic field generated by the first magnetic element 11.

[0038] In some implementations, such as Figure 4-5 As shown, the plate-like structure has a rounded rectangular surface. Correspondingly, the shape of the first receiving groove 133 is adapted to the rounded rectangle, and the depth of the first receiving groove 133 is the same as the thickness of the plate-like structure. In this embodiment, the shape of the horizontal cross-section of the first receiving groove 133 is also set as a rounded rectangle. Using a milling cutter with the same radius as the rounded corner, it is convenient to cut the rounded corner.

[0039] Furthermore, there are four outer magnetic parts 2, each corresponding to a straight side of the rounded rectangle. In this embodiment, by symmetrically arranging four outer magnetic parts 2 around the central magnetic part 1, it is ensured that the Ampere force on the voice coil 7 is located in the height direction of the speaker.

[0040] In some implementations, such as Figure 4 As shown, the central body 132 is a central plate, and the side of the central plate facing the second magnetic element 12 is flush with the side of the surrounding body 131 facing the second magnetic element 12. That is, the bottom of the surrounding body 131 is flush with the bottom of the central body 132, so that the central magnetic conductor 13 can be mounted on the top surface of the second magnetic element 12 through this plane. At the same time, the surrounding body 131 has an inner wall 1311 and an outer wall 1312 that are opposite to each other, and the outer wall 1312 is aligned with the side of the second magnetic element 12. Thus, the central magnetic conductor 13 and the second magnetic element 12 together form a sidewall of the magnetic gap 3, so that the voice coil 7 can move up and down along the magnetic gap 3, avoiding collision between the voice coil 7 and the central magnetic part 1.

[0041] In some implementations, such as Figure 4 As shown, the cross-section of the surrounding body 131 extending in the direction of extension is a rectangle with unequal side lengths. The long side of the rectangle is connected to the central body 132, that is, the short side of the rectangle extends towards the magnetic gap 3. Figure 4 The enlarged view in the figure shows a specific form of the surround 131. The outlines of the surround 131 and the central body 132 in the figure are shown by thick solid lines. The surround 131 in the figure extends along the height direction of the magnetic gap 3 so that the voice coil 7 can always be in the magnetic field during the reciprocating motion.

[0042] In some implementations, such as Figure 4-5 As shown, the outer magnetic part 2 includes a third magnetic element 21 and an outer magnetic conductor 22 stacked together. The surrounding body 131 simultaneously forms a magnetic gap 3 with the regions on the opposite sides of the third magnetic element 21 and the outer magnetic conductor 22. Figure 5A schematic diagram of the magnetic field lines in the magnetic gap 3 is shown, divided into three parts. The magnetic field lines at the top of the magnetic gap 3 are acted upon by the central magnetic guide 13 and the outer magnetic guide 22. The magnetic field lines in the middle of the magnetic gap 3 are acted upon by the central magnetic guide 13 and the third magnetic guide 21. The magnetic field lines in the first two parts are relatively evenly distributed, while the magnetic field lines at the bottom of the magnetic gap 3 are relatively fewer. Therefore, during the up-and-down movement of the voice coil 7, most of the magnetic field can stably pass through the voice coil 7. This reduces the occurrence of speaker distortion.

[0043] In some implementations, such as Figure 4 As shown, the speaker also includes a magnetic base plate 5 and a housing portion 6. Four outer magnetic portions 2 and a second magnetic element 12 are attached to the same side of the magnetic base plate 5. In this embodiment, the magnetic base plate 5 can provide mounting positions for the central magnetic portion 1 and the outer magnetic portions 2, and can also form a magnetic circuit system together with the central magnetic portion 1 and the outer magnetic portions 2.

[0044] In some implementations, such as Figure 1-3 As shown, the loudspeaker also includes a diaphragm 4 and a housing 6. The housing 6 includes a plurality of mounting platforms 61 and a window 62. The plurality of mounting platforms 61 protrude toward the same side. A magnetic base plate 5 is mounted on the top of the mounting platform 61. The edge of the diaphragm 4 is fixedly connected to the edge of the window 62.

[0045] Specifically, there are four mounting platforms 61, located at the four corners of the magnetic base plate 5. (Refer to...) Figure 1 As shown, a mounting recess 611 is also provided on the top of the mounting platform 61 near the center of the speaker. This mounting recess 611 is formed by the top of the mounting platform 61 recessing towards the bottom of the mounting platform 61. In this embodiment, the mounting platforms 61 can be used to space the magnetic base plate 5 and the diaphragm 4 in the height direction of the speaker, and the mounting recess 611 is used to hold the magnetic base plate 5 between the four mounting platforms 61, thereby providing sufficient space for arranging the central magnetic part 1 and the outer magnetic part 2.

[0046] Figure 8 This is a schematic diagram of airflow within a loudspeaker. In some implementations, such as... Figure 8 As shown, there are four mounting platforms 61, each with an arc-shaped flow guide surface 612. The arc-shaped flow guide surface 612 is located laterally on the mounting platform 61 and is opposite to the central magnetic part 1. The outer magnetic part 2 has a flow guide slope 23 adjacent to the arc-shaped flow guide surface 612. The flow guide slope 23 is located laterally on the outer magnetic part 2, and each flow guide slope 23 extends toward the adjacent arc-shaped flow guide surface 612.

[0047] Specifically, such as Figure 8The figure also shows dashed line III and four arrows. As shown by dashed line III, the edge of the flow guiding slope 23 corresponds to the arc-shaped flow guiding surface 612. The outlines of the arc-shaped flow guiding surface 612 and the flow guiding slope 23 are also shown in the figure with thick solid lines. The flow guiding slope 23 is simultaneously provided on the third magnetic component 21 and the outer magnetic component 22.

[0048] When the speaker vibrates, the voice coil 7 is subjected to an Ampere force, which causes the diaphragm 4 to move up and down. This causes a change in the internal volume of the speaker. To avoid affecting the movement of the diaphragm 4 during this process, this embodiment uses the guide slope 23 and the arc-shaped guide surface 612 to guide the airflow inside the speaker.

[0049] Taking the movement of the voice coil 7 towards the magnetic base plate 5 as an example, the voice coil 7 drives the diaphragm 4 during its movement, causing the volume inside the speaker to decrease, as shown by the arrow in the figure. During this process, the airflow will reach the arc-shaped guide surface 612 along the guide slope 23, and then be discharged to the outside of the speaker via the arc-shaped guide surface 612. This avoids the impact on the movement of the diaphragm 4 due to the inability of air to be discharged in time. On the other hand, as the air flows out, the heat generated by the speaker can also be discharged together.

[0050] In some implementations, such as Figure 8 As shown, the housing 6 includes four fixing plates 64 corresponding to the four outer magnetic parts 2. Each outer magnetic part 2 is fixed to its side away from the central magnetic part 1 on the fixing plate 64. Mounting platforms 61 are spaced apart between adjacent fixing plates 64 and correspond to the central magnetic part 1 through the gap between adjacent outer magnetic parts 2. This embodiment utilizes the gap between the mounting platform 61 and the fixing plate 64 to conduct gas within the magnetic gap 3 to the outside of the speaker, allowing air to continuously flow in and out of the speaker during vibration. This reduces speaker distortion and overheating.

[0051] In some implementations, such as Figure 7 As shown, the central body 132 is a central plate, and the surrounding body 131 forms a second receiving groove 134 around the central plate. The orientation of the second receiving groove 134 is opposite to that of the first receiving groove 133. The second magnetic element 12 is installed in the second receiving groove 134, and the side of the second magnetic element 12 corresponds to at least a portion of the inner sidewall of the second receiving groove 134.

[0052] This embodiment can simultaneously prevent the first magnetic element 11 and the second magnetic element 12 from directly applying their magnetic fields to the outer magnetic part 2. Figure 7 As can be seen, in the height direction of the magnetic gap 3, in addition to the magnetic lines of force located at the top and middle being evenly distributed, the magnetic lines of force located at the bottom of the magnetic gap 3 are also relatively evenly distributed. Figure 5 and Figure 7The diagram also uses dashed lines to show the approximate cross-sectional outline of the voice coil 7. A comparison of the two diagrams shows that this embodiment can further make the magnetic field distribution acting on the voice coil 7 more uniform. Figure 5 The magnetic lines of force, located at the bottom region of the central magnetic section 1 and exhibiting a coiled state, are guided sequentially by the central body 132 and the surrounding body 131 towards the top of the magnetic gap 3. This makes the magnetic field passing through the voice coil 7 more uniform, reducing speaker distortion. It also improves the Ampere force when the voice coil 7 moves towards the guide magnetic base plate 5.

[0053] In some implementations, such as Figure 7 As shown, the bottom surface of the second receiving groove 134 is parallel to the bottom surface of the first receiving groove 133. Simultaneously, in the thickness direction of the central plate, the sidewalls of the first receiving groove 133 and the second receiving groove 134 coincide, and both the sidewalls of the first receiving groove 133 and the sidewalls of the second receiving groove 134 are perpendicular to the bottom surface of the first receiving groove 133. The second magnetic element 12 is a plate-shaped element, and the surrounding body 131 covers the edge of the plate-shaped element. In other words, in this embodiment, the horizontal cross-sections of the first receiving groove 133 and the second receiving groove 134 are configured to be the same and coincident. Therefore, in the height direction of the magnetic gap 3, the magnetic field acting on the outer magnetic part 2 after passing through the central magnetic guide 13 will be more uniform.

[0054] In some implementations, such as Figure 7 As shown, the surround 131 has a mounting end face 1313 surrounding the second receiving groove 134. The speaker also includes a magnetic base plate 5, with the central magnetic part 1 mounted on the magnetic base plate 5. The mounting end face 1313 and the second magnetic element 12 are simultaneously in contact with the magnetic base plate 5. In this embodiment, the second magnetic element 12 can be stably held in place by the cooperation of the central magnetic element 13 and the magnetic base plate 5, preventing the second magnetic element 12 from shaking during speaker use. At the same time, it also ensures that the magnetic field formed by the second magnetic element 12 and the third magnetic element 21 through the magnetic base plate 5 is more stable.

[0055] In some implementations, such as Figure 7 As shown, the depth of the first receiving groove 133 is configured to be greater than the depth of the second receiving groove 134. L1 and L2 shown in the figure represent the depths of the first receiving groove 133 and the second receiving groove 134, respectively; that is, L1 is greater than L2. Conversely, the thickness of the first magnetic element 11 is greater than the thickness of the second magnetic element 12, so as to move the magnetic lines of force in the magnetic gap 3 upwards as much as possible. During the movement of the voice coil 7, the first magnetic element 11 and the central body 132 remain aligned with the voice coil 7. This further reduces speaker distortion.

[0056] In an alternative implementation, the speaker in the above embodiments can be applied to an electronic device.

[0057] In this embodiment of the electronic device, the first magnetic element 11 and the second magnetic element 12 of the speaker are respectively disposed on both sides of the central magnetic guide 13. Simultaneously, the first magnetic element 11 is positioned inside the central magnetic guide 13 via the first receiving groove 133 to increase the magnetic field strength within the central magnetic guide 13, thereby improving the magnetic flux density between the central magnetic guide 13 and the outer magnetic part 2. This avoids the first magnetic element 11 directly acting on the outer magnetic part 2, preventing uneven distribution of magnetic lines of force. Furthermore, during the manufacturing process of the central magnetic guide 13, by controlling the position of the first receiving groove 133 on the central magnetic guide 13, the relative positions of the first magnetic element 11, the central magnetic guide 13, and the second magnetic element 12 in the horizontal direction can be better controlled. This further ensures that the width of the magnetic gap 3 is consistent in all directions, thereby making the voice coil movement more stable and improving the sound quality of the electronic device. Especially when the speaker operates at low frequencies, it can significantly reduce total harmonic distortion.

[0058] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can be modified and varied in various ways. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of protection of the present invention.

Claims

1. A loudspeaker, characterized in that, The loudspeaker includes: Voice coil (7); Shell part (6); The diaphragm (4), the housing portion (6) is fixedly connected to the outer edge of the diaphragm (4), and the end face of the voice coil (7) is fixedly connected to the inner side of the outer edge of the diaphragm (4); and An outer magnetic part (2) and a central magnetic part (1) are provided, and a magnetic gap (3) is formed between the outer magnetic part (2) and the central magnetic part (1), and the voice coil (7) is at least partially located in the magnetic gap (3); The central magnetic part (1) includes a central magnetic conductor (13), a first magnetic conductor (11), and a second magnetic conductor (12) stacked together. The central magnetic conductor (13) is spaced between the first magnetic conductor (11) and the second magnetic conductor (12). The central magnetic conductor (13) includes a surrounding body (131) and a central body (132). The surrounding body (131) extends circumferentially along the central body (132) and forms a first receiving groove (133) with the central body (132). The first magnetic conductor (11) is installed in the first receiving groove (133) and the side of the first magnetic conductor (11) corresponds to at least a portion of the inner sidewall of the first receiving groove (133). The first magnetic component (11) is a plate-shaped structure, and the plate surface of the plate-shaped structure is a rounded rectangle. The shape of the first receiving groove (133) is adapted to the rounded rectangle. The speaker also includes: A magnetic base plate (5), four outer magnetic parts (2) and the second magnetic element (12) are attached to the same side of the magnetic base plate (5), the gap between two adjacent outer magnetic parts (2) corresponds to the central magnetic part (1), and the four outer magnetic parts (2) correspond to the straight sides of the rounded rectangle; and The housing part (6) includes four mounting platforms (61), which are located at the four apex corners of the magnetic base plate (5) and correspond to the apex corners of the rounded rectangle. A mounting recess (611) is also provided on the top of the mounting platform (61) near the middle area of ​​the speaker. The mounting recess (611) is recessed from the top of the mounting platform (61) to the bottom of the mounting platform (61). The apex corner of the magnetic base plate (5) is engaged with the corresponding mounting recess (611). The central body (132) is a central plate, and the surrounding body (131) forms a second receiving groove (134) around the central plate. The orientation of the second receiving groove (134) is opposite to that of the first receiving groove (133). The second magnetic element (12) is installed in the second receiving groove (134) and the side of the second magnetic element (12) corresponds to at least a portion of the inner sidewall of the second receiving groove (134); The bottom surface of the second receiving groove (134) is parallel to the bottom surface of the first receiving groove (133); In the thickness direction of the center plate, the sidewalls of the first receiving groove (133) and the second receiving groove (134) coincide, and the sidewalls of the first receiving groove (133) and the second receiving groove (134) are perpendicular to the bottom surface of the first receiving groove (133). The depth of the first receiving groove (133) is configured to be greater than the depth of the second receiving groove (134), and the thickness of the first magnetic element (11) is greater than the thickness of the second magnetic element (12).

2. The loudspeaker according to claim 1, characterized in that, The first receiving groove (133) is located in the center of the central magnetic conductor (13) and faces the diaphragm (4), and the surrounding body (131) covers the edge of the plate structure.

3. The loudspeaker according to claim 2, characterized in that... The depth of the first receiving groove (133) is the same as the thickness of the plate-like structure.

4. The loudspeaker according to claim 2, characterized in that, The side of the central plate facing the second magnetic element (12) is flush with the side of the surrounding body (131) facing the second magnetic element (12); The surrounding body (131) has an inner wall (1311) and an outer wall (1312) that are opposite to each other, the outer wall (1312) being aligned with the side of the second magnetic element (12).

5. The loudspeaker according to any one of claims 1-4, characterized in that, The cross-section of the surrounding body (131) extending in the direction of extension is a rectangle with unequal side lengths, and the long side of the rectangle is connected to the central body (132).

6. The loudspeaker according to any one of claims 1-4, characterized in that, The outer magnetic part (2) includes a third magnetic element (21) and an outer magnetic conductor (22) stacked together; The surrounding body (131) simultaneously forms the magnetic gap (3) with the regions on the opposite sides of the third magnetic element (21) and the outer magnetic conductor (22).

7. The loudspeaker according to claim 1, characterized in that, The housing part (6) also includes a window (62) and the edge of the diaphragm (4) is fixedly connected to the edge of the window (62).

8. The loudspeaker according to claim 7, characterized in that, Each of the mounting platforms (61) is provided with an arc-shaped flow guide surface (612), which is located on the side of the mounting platform (61) and opposite to the central magnetic part (1); The outer magnetic part (2) is provided with a guide slope (23) adjacent to the arc-shaped guide surface (612). The guide slope (23) is located laterally to the outer magnetic part (2), and each guide slope (23) extends toward the adjacent arc-shaped guide surface (612).

9. The loudspeaker according to claim 8, characterized in that, The housing part (6) includes four fixing plates (64) corresponding to the four outer magnetic parts (2). The side of each outer magnetic part (2) away from the central magnetic part (1) is fixed to each fixing plate (64). Each mounting platform (61) is spaced apart between two adjacent fixing plates (64).

10. The loudspeaker according to claim 1, characterized in that, The second magnetic element (12) is a plate-shaped element, and the surrounding body (131) covers the edge of the plate-shaped element.

11. The loudspeaker according to claim 1, characterized in that, The surround (131) has a mounting end face (1313) surrounding the second receiving groove (134); The speaker also includes: A magnetic base plate (5) is provided, the central magnetic part (1) is mounted on the magnetic base plate (5), and the mounting end face (1313) and the second magnetic element (12) are simultaneously attached to the magnetic base plate (5).

12. The loudspeaker according to claim 1, characterized in that, During the movement of the voice coil (7), the first magnetic element (11) and the central body (132) remain in correspondence with the voice coil (7).

13. An electronic device, characterized in that, The electronic device includes: The loudspeaker according to any one of claims 1-12.

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