A loudspeaker device

Abstract

The present application discloses a loudspeaker device. The loudspeaker device includes: a chassis; a vibration assembly, the vibration assembly includes a voice coil, a diaphragm, an annular skeleton and a surround, the annular skeleton has a main body portion and an extension portion, the extension portion extends radially outward along the main body portion, the diaphragm is disposed on the annular skeleton, the diaphragm is connected to the extension portion, the inner edge of the surround is connected to the annular skeleton, the outer edge of the surround is connected to the chassis, the diameter of the diaphragm is larger than the diameter of the inner edge of the surround, the voice coil is located within the annular skeleton, and the voice coil forms a connection with the diaphragm; a magnetic circuit system, the magnetic circuit system is disposed within the chassis, a magnetic gap is formed in the magnetic circuit system, and the voice coil is located within the magnetic gap.

Description

Technical Field

[0001] This application belongs to the technical field of electro-acoustic conversion. Specifically, this application relates to a speaker device. Background Art

[0002] As a device for people's daily entertainment, with the increasing demand for the quality of life, higher and higher requirements are put forward for the sound-emitting device.

[0003] As the core component of sound-emitting devices such as home audio and car audio, the speaker device is widely used in electronic products. The product quality of the speaker device itself directly affects the sound quality. In recent years, the development trend of electronic products tends to be thinner, lighter and smaller. Those skilled in the art need to design the speaker device into a form that occupies less space. However, this structural design requirement will seriously affect the acoustic performance of the speaker device, resulting in the defect that the acoustic performance cannot meet the sound quality requirements.

[0004] Therefore, it is necessary to improve the structure of the speaker device, optimize the structure in a limited space, so as to optimize the acoustic performance. Summary of the Invention

[0005] One object of this application is to provide an improved speaker device.

[0006] According to one aspect of this application, there is provided a speaker device, including:

[0007] A chassis;

[0008] A vibration assembly, the vibration assembly includes a voice coil, a diaphragm, an annular skeleton and a surround. The annular skeleton has a main body portion and an outer extension portion. The outer extension portion extends radially outward along the main body portion. The diaphragm is covered on the annular skeleton. The diaphragm is connected to the outer extension portion. The inner edge of the surround is connected to the annular skeleton. The outer edge of the surround is connected to the chassis. The diameter of the diaphragm is larger than the diameter of the inner edge of the surround. The voice coil is located inside the annular skeleton. The voice coil forms a connection with the diaphragm;

[0009] A magnetic circuit system, the magnetic circuit system is arranged inside the chassis. A magnetic gap is formed in the magnetic circuit system. The voice coil is located inside the magnetic gap.

[0010] Optionally, the outer extension portion has a flat portion and a bent portion. The flat portion extends radially along the main body portion. The bent portion extends axially along the main body portion away from the surround. The diaphragm is connected to the bent portion.

[0011] Optionally, the inner edge of the surround is connected to the flat portion.

[0012] Optionally, the axial height of the bent portion along the main body portion is higher than the height of the main body portion.

[0013] Optionally, the inner edge of the surround is connected to the main body portion.

[0014] Optionally, it further includes an outer centering support piece, the outer edge of the outer centering support piece is connected to the chassis, and the inner edge of the outer centering support piece is connected to the annular skeleton.

[0015] Optionally, the inner edge of the outer centering support piece is connected to the main body portion.

[0016] Optionally, it further includes an inner centering support piece, one side edge of the inner centering support piece is connected to the vibration assembly, and the other side edge of the inner centering support piece forms a connection with the magnetic circuit system.

[0017] Optionally, the outer edge of the inner centering support piece is connected to the annular skeleton, and the inner edge of the inner centering support piece forms a connection with the magnetic circuit system.

[0018] Optionally, a boss is formed on the main body portion, and the outer edge of the inner centering support piece is connected to the boss.

[0019] The horn device provided by the present application makes full use of the space occupied by its overall structure, relatively increases the size of the vibrating plate, and improves the acoustic performance.

[0020] Other features and advantages of the present application will become clear through the following detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings. Description of the Drawings

[0021] The drawings incorporated in the specification and constituting a part of the specification illustrate embodiments of the present application, and together with the description are used to explain the principles of the present application.

[0022] Figure 1 is a schematic side cross-sectional view of a horn device provided by a specific embodiment of the present application;

[0023] Figure 2 is a schematic side cross-sectional view of another horn device provided by a specific embodiment of the present application.

[0024] Reference Numerals:

[0025] 1. Speaker frame; 21. Voice coil; 22. Diaphragm; 231. Main body; 2311. Boss; 2321. Flat part; 2322. Bent part; 24. Surround; 3. Outer centering spider; 4. Inner centering spider; 5. Support part; 611. Bottom plate; 612. Vertical part; 6121. First mounting groove; 6122. First magnet; 621. Second magnet; 622. Side magnetic conduction part; 6221. Second mounting groove; 6222. Third magnet; 63. Magnetic gap. Detailed implementation manners

[0026] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present application.

[0027] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way serves as a limitation to the present application, its application or use.

[0028] Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods and devices should be regarded as part of the specification.

[0029] In all the examples shown and discussed herein, any specific values should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0030] It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0031] The present application provides a speaker device, which includes a speaker frame, a vibration assembly and a magnetic circuit system. The speaker frame serves as a bearing component of the speaker device, which functions to accommodate the vibration assembly and the magnetic circuit system and provide support and accommodation for other components. The speaker frame can be made of metal materials or plastic materials.

[0032] The magnetic circuit system is used to provide a magnetic field for the speaker device. A magnetic gap is formed in the magnetic circuit system, and the magnetic field is an important power source for the speaker device to vibrate and generate sound.

[0033] The vibration assembly is connected to the chassis and the magnetic circuit system in a movable manner. When the horn device is actually working, a sound signal is introduced into the vibration assembly, and it can generate vibration under the action of the magnetic field, thereby generating sound. The vibration assembly may include a voice coil diaphragm and a surround. The voice coil forms a direct or indirect connection relationship with the diaphragm and the surround. The voice coil is used to introduce a sound signal and current. The diaphragm can be driven by the voice coil to vibrate. The surround is used to connect the diaphragm to the chassis or the magnetic circuit system. The surround is a bent annular structure, one side of which is connected to the chassis, and the other side is connected to the diaphragm or other vibration components. When the voice coil, the diaphragm and other vibration components vibrate, the surround can provide a deformable connection function for the vibration assembly, so that the vibration assembly remains connected to the chassis and the magnetic circuit system. The vibration components such as the voice coil and the diaphragm are movably connected to the chassis through the surround.

[0034] Optionally, the vibration assembly may further include an annular skeleton. As Figure 1 , 2 shown, the annular skeleton has a main body portion 231 and an extension portion. The annular skeleton serves as a vibration assembly to improve balance and vibration stability. The main body portion 231 of the annular skeleton is generally in an annular structure or a barrel-shaped structure, and the extension portion extends radially outward from the main body portion 231 along the main body portion 231. The extension portion is used to provide a bearing and connection function for the diaphragm 22.

[0035] The diaphragm 22 is disposed on the annular skeleton, and the diaphragm 22 is connected to the extension portion, as Figure 1 , 2 shown. The extension portion provides a support position for the diaphragm 22. The size of the extension portion is larger than that of the main body portion 231, and can provide a good support function for the diaphragm with a larger size.

[0036] The inner edge of the surround 24 is connected to the annular skeleton, that is, the diaphragm 22 forms an indirect connection relationship with the surround 24 through the annular skeleton. The outer edge of the surround 24 is connected to the chassis 1. The voice coil 21 is located in the area surrounded by the annular skeleton, and the voice coil 21 is directly or indirectly connected to the diaphragm. In this way, the diaphragm, the annular skeleton, and the voice coil as a whole are movably connected to the chassis through the surround. The surround forms a suspension connection for the diaphragm, the annular skeleton, and the voice coil.

[0037] Optionally, the diameter of the diaphragm 22 is larger than the diameter of the inner edge of the surround 24, as Figure 1 , 2As shown. In this alternative embodiment, since the annular skeleton has a main body portion 231 and an extension portion, the extension portion extends a certain distance outward, thereby providing a support structure with a larger size for the vibrating plate. On the contrary, the surround can be connected to a partial structure on the annular skeleton with a relatively smaller radial dimension. In this way, the diameter of the vibrating plate is not limited by the diameter of the inner edge of the surround. The size of the surround does not need to increase with the increase in the size of the vibrating plate, so that the overall diameter of the horn device does not increase, ensuring that the overall structural size of the horn device is maintained within a limited size range.

[0038] The above embodiment of the present application effectively utilizes the space already occupied by the overall structure of the horn device. By designing the annular skeleton and providing an extension portion and a main body portion on the annular skeleton, the sizes of the vibrating plate and the surround do not affect each other, and the problem that the surround and the vibrating plate cannot be directly connected under special circumstances is solved.

[0039] Optionally, the extension portion has a flat portion 2321 and a bent portion 2322, as Figure 1 、 2 shown. The flat portion 2321 extends transversely along the radial direction of the main body portion 231. The flat portion 2321 mainly serves to increase the radial dimension of the extension portion so as to provide a support structure with a larger radial dimension for the vibrating plate 22. The bent portion 2322 extends along the axial direction of the main body portion 231 away from the surround 24. In the embodiment shown in Figure 1 、 2 , the bent portion 2322 extends upward along the axial direction. In this way, the bent portion 2322 can form an avoidance relationship with the surround 24. The vibrating plate 22 is connected to the bent portion 2322, and the vibrating plate 22 can be axially avoided and misaligned with the surround 24, thereby preventing interference between the vibrating plate and the surround. In practical applications, this design method does not have the defect that the surround and the vibrating plate collide or interfere with each other.

[0040] Optionally, the inner edge of the surround 24 can be connected to the flat portion 2321. As shown in Figure 1 、 2 , the inner edge of the surround 24 is connected to the side of the flat portion 2321 away from the bent portion 2322. On the one hand, the flat portion can provide a flat and stable support for the surround. On the other hand, the surround can be avoided from the vibrating plate located on the bent portion to prevent interference.

[0041] Optionally, the inner edge of the surround 24 may also be connected to the main body portion 231. The overall structure of the main body portion 231 has better structural stability and is not prone to problems such as skew during vibration. Connecting the inner edge of the surround to the main body portion can reduce the risk of polarization during the operation of the vibration assembly and improve the stability of the acoustic performance.

[0042] Specifically, the inner edge of the surround 24 may be connected to both the planar portion 2321 and the main body portion 231 simultaneously. The inner edge of the surround 24 has a partially flat structure, which can be attached to the planar portion 2321, while the edge of the inner edge abuts against and is connected to the main body portion 231. This design method can further improve the vibration consistency between the surround and the annular skeleton and enhance the stability of the overall vibration.

[0043] Optionally, as Figure 1 , 2 shown, the bent portion 2322 is higher than the main body portion 231 along the axial height of the main body portion 231. By this design method, it is possible to avoid interference and obstruction between the diaphragm 22 and the top of the main body portion 231 when the diaphragm 22 is connected to the bent portion 2322. A certain gap can be formed between the diaphragm and the main body portion. If the distance between the diaphragm and the main body portion is too close or there is some contact, during the vibration of the vibration assembly, there may be a collision phenomenon between the diaphragm and the main body portion due to asynchronous vibration between them, which will seriously affect the acoustic performance of the speaker device.

[0044] Optionally, the outer extension portion may be integrally in a ring structure. That is, the outer extension portion is a complete ring, so that support and connection functions can be provided to the diaphragm 22 at various positions in the circumferential direction. This design method can better provide stable support and connection for the diaphragm, reduce the defect of asynchronous vibration of the support plate relative to the annular skeleton, or the defect of unstable connection between the two due to long-term use.

[0045] Optionally, the speaker device may further include an outer centering washer 3, as Figure 1 , 2 shown. The outer edge of the outer centering washer 3 is connected to the chassis 1, and the inner edge of the outer centering washer 3 is connected to the annular skeleton. The outer centering washer is used to provide stable vibration and suppress polarization for vibration components such as the annular skeleton. The vibration components may still have defects such as polarization and unstable vibration only relying on the connection of the surround. The outer centering washer is used to provide this stable connection function and form a movable connection between the vibration components and the chassis at other positions. Moreover, the traction strength of the outer centering washer can be designed to be higher than that of the surround, so as to effectively reduce defects such as vibration skew.

[0046] Optionally, as Figure 1 shown, the inner edge of the outer centering support piece 3 is connected to the main body part 231. The main body part 231 of the annular skeleton has a more stable structure and has a greater weight as the main body of the annular skeleton. The outer centering support piece 3 can more effectively support the annular skeleton and other vibration components and stabilize the vibration by supporting the main body part 231.

[0047] Optionally, a groove for mating connection with the inner edge of the outer centering support piece may be formed on the bottom end surface of the main body part, and the inner edge of the outer centering support piece may be embedded in the groove of the main body part. On the one hand, it can improve the connection reliability, and on the other hand, it can improve the assembly positioning accuracy between the outer centering support piece and the main body part.

[0048] Optionally, as Figure 1 、 2 shown, the horn device may further include an inner centering support piece 4. One side edge of the inner centering support piece 4 is connected to the vibration component, and the other side edge of the inner centering support piece 4 is directly or indirectly connected to the magnetic circuit system. The inner centering support piece 4 is located inside the annular skeleton and is also used to provide support and balance for the vibration component, thereby reducing the possibility of polarization of the vibration component. The magnetic circuit system is usually also a fixed component that does not move in the horn device.

[0049] Optionally, in the embodiment shown in Figure 1 , the outer edge of the inner centering support piece 4 is connected to the annular skeleton, and the inner edge is indirectly connected to the magnetic circuit system. The inner centering support piece 4 plays a role of supporting and balancing the annular skeleton from the inside. As the main structure of the vibration component, the improvement of its stability can effectively improve the overall stability of the vibration component.

[0050] Optionally, in the embodiment shown in Figure 2 , the outer edge of the inner centering support piece 4 is indirectly connected to the magnetic circuit system, and the inner edge is connected to the voice coil 21. The voice coil 21 is a component in the vibration component that is driven by a driving force and thus generates vibration, that is, the source of the driving force. The connection relationship between the inner centering support piece 4 and the voice coil 21 can effectively prevent the voice coil 21 from being polarized, thereby reducing the possibility of polarization of the entire vibration component due to uneven driving force.

[0051] Both of the above two embodiments can enable the inner centering support piece to play a role in stabilizing the vibration component.

[0052] Optionally, a groove for mating connection with the outer edge of the inner centering support piece may be formed on the top surface of the main body part. The outer edge of the inner centering support piece is embedded in the groove on the top surface of the main body part, and the inner edge of the inner centering support piece is connected to the magnetic circuit system. By providing the groove, the connection reliability and assembly positioning accuracy of the inner centering support piece can be improved.

[0053] Due to the compact structure inside the horn device, the spacing between the magnetic circuit system and the vibration component is limited, and it is somewhat difficult to arrange the inner centering washer. This application provides an improved method to facilitate the arrangement of the inner centering washer in the horn device and prevent the inner centering washer from interfering with and colliding with the magnetic circuit system, etc.

[0054] Optionally, the horn device includes a support portion 5, and the support portion 5 is disposed on the magnetic circuit system, as Figure 1 , 2 shown. The support portion 5 has a fixed area and a support area. The fixed area is fixedly connected to the magnetic circuit system so that the support portion 5 is fixed on the magnetic circuit system. The support area protrudes upward relative to the magnetic circuit system. As Figure 1 shown, along the axial direction of the voice coil 21, that is, the height direction, the support area is higher than the surface of the magnetic circuit system. One side edge of the inner centering washer 4 is connected to the support area, and the other side is connected to the vibration component.

[0055] Through this design method, the support portion can hold up the inner centering washer inside the horn device, thereby avoiding relative interference between the inner centering washer and the magnetic circuit system. Further, the held-up inner centering washer is also easier to connect to the vibration component, such as the annular skeleton or the voice coil. It avoids problems such as the uneven heights of the two components to which the inner centering washer is to be connected, making it difficult to connect the inner centering washer.

[0056] Optionally, a boss 2311 may be formed on the main body portion 231, and the above-mentioned groove may be formed on the boss 2311. The outer edge of the inner centering washer 4 is connected to the end face of the boss 2311, as Figure 1 shown. By providing a boss on the main body portion 231, on the one hand, it can facilitate the connection between the inner centering washer and the main body portion, and on the other hand, it can reduce the risk of the inner centering washer colliding with and interfering with other components. Since there is a magnetic circuit system in the horn device, if one side of the inner centering washer is not connected to the magnetic circuit system, it is necessary to prevent it from colliding with the magnetic circuit system. By designing the boss, the inner centering washer can be held up, reducing the risk of collision.

[0057] Optionally, the support portion 5 may be made of plastic material. Since the support portion needs to be disposed on the magnetic circuit system and does not protrude outward relative to the magnetic circuit system, the support portion is made of plastic material to avoid interfering with the magnetic field of the magnetic circuit system. The support portion may also be made of other non-magnetic conductive materials, which can also avoid interfering with the magnetic field distribution of the magnetic circuit system. In this application, making the support portion of plastic can reduce costs and the weight of the product while meeting the structural strength requirements.

[0058] Optionally, accommodation grooves may be formed on the magnetic circuit system, and the accommodation grooves are used to carry and fix the support portion 5. The shape of the accommodation groove matches the shape of the fixing area of the support portion 5, and the fixing area can be inserted into the accommodation groove, so as to form a stable and reliable connection relationship with the magnetic circuit system.

[0059] Optionally, notches may be formed on the fixing area of the support portion 5, and the shape of the notches matches the shape of the corner position of the magnetic circuit system. As Figure 2 shown, the notches of the fixing area can be clamped at the corner positions of the magnetic circuit system, so as to achieve good relative positioning and assembly stability. The support portion 5 can be positioned and fixed on the magnetic circuit system in the form of buckling and buckling through the design of the notches.

[0060] Optionally, the support portion may be in a complete annular structure, and the support portion surrounds the voice coil 21. The notch may also be an annular notch. In this way, the support portion can be in the form of an annular sleeve and is sleeved around the corner position at the end of the magnetic circuit system through the notch, which is convenient and reliable for positioning. At the same time, it can provide a stable supporting effect for the inner centering support piece.

[0061] Optionally, the fixing area and the magnetic circuit system are fixedly connected in a bonding form. Bonding fixation can provide a stable connection relationship and will not interfere with the magnetic field of the magnetic circuit system.

[0062] The magnetic circuit system may include a side magnetic portion, and the side magnetic portion includes a second magnet 621 and a side magnetic conduction portion 622. As Figure 1 shown, the side magnetic conduction portion 622 is disposed on the second magnet 621, and the magnetic gap 63 is located inside the second magnet 621 and the side magnetic conduction portion 622. The support portion 5 is disposed above the side magnetic conduction portion 622.

[0063] The inner centering support piece and the outer centering support piece provided in the present application can be applied together. The outer centering support piece provides support for the vibration assembly from the outside of the annular skeleton, and the inner centering support piece provides support for the vibration assembly from the inside of the annular skeleton. In this way, the annular skeleton can receive comprehensive and reliable balance limiting effects, and the possibility of the vibration assembly generating polarized and inclined vibrations is greatly reduced.

[0064] Optionally, the inner centering support piece and the outer centering support piece may be staggered along the circumferential direction of the voice coil, and the balance support forces are more evenly distributed through the internal and external staggered settings in a limited space, saving materials and making full use of the space.

[0065] As described above, the magnetic circuit system is disposed within the chassis and is used in the horn device to provide a magnetic field so that the voice coil can vibrate within the magnetic field. Generally speaking, increasing the magnetic field strength can improve the vibration sensitivity and amplitude of the vibration assembly, thereby improving the acoustic performance of the horn device. Increasing the magnetic field strength is mainly achieved by increasing the volume of the magnetic circuit system and the magnetism of the magnet. However, in actual product requirements, the overall size of the horn device is often fixed and cannot be increased arbitrarily, which may result in the magnetic circuit system with limited volume being unable to generate a strong enough magnetic field to meet the requirements of acoustic performance.

[0066] In response to this, the present application provides an improved magnetic circuit system that effectively utilizes the limited space and increases the magnetic field strength generated by the magnetic circuit system.

[0067] The magnetic circuit system may include a central magnetic portion and a peripheral magnetic portion, and the peripheral magnetic portion is located around the central magnetic portion. A magnetic gap 63 is formed between the peripheral magnetic portion and the central magnetic portion, and the voice coil 21 is located in the magnetic gap 63.

[0068] The present application provides an improvement to the magnetic circuit system from the perspective of the central magnetic portion.

[0069] The magnetic circuit system may further include a pole piece and a first magnet 6122. The pole piece has a bottom plate 611 and a vertical portion 612, as Figure 1 shown. The bottom plate 611 is used to carry the peripheral magnetic portion, and the pole piece can be fixedly connected to the chassis 1 through the bottom plate 611. The pole piece is fixedly disposed within the chassis 1 as a whole.

[0070] A first mounting groove 6121 is formed at the top end of the vertical portion 612, and the first magnet 6122 is disposed within the first mounting groove 6121. The peripheral magnetic portion is disposed on the bottom plate 611 and is located around the vertical portion 612. The vertical portion 612 constitutes the central magnetic portion, and the magnetic gap 63 is formed between the vertical portion 612 and the peripheral magnetic portion.

[0071] Since the peripheral magnetic portion laterally guides the magnetic field into the magnetic gap 63 and then into the central magnetic portion, that is, into the vertical portion 612. Therefore, for the central magnetic portion that is not directly opposite to the peripheral magnetic portion, its magnetic conduction effect is limited. The magnetic field usually circulates in the region near the side wall surface outside the central magnetic portion. Therefore, the top and center of the central magnetic portion are difficult to play a role in magnetic conduction. This part of the structure has a limited guiding effect on the magnetic field, and the space is not fully utilized.

[0072] The technical solution of the present application forms a first installation groove 6121 at the top of the vertical portion 612, and a first magnet 6122 is arranged in the first installation groove 6121, so that the first magnet 6122 located at the top of the vertical portion 612 can radiate a magnetic field to the area below the vertical portion 612, and the first magnet 6122 can form a magnetic field cooperation with the side magnetic portion. In this way, the magnetic field generated by the magnetic circuit system can be further enhanced, and a stronger and more uniform magnetic field can be generated in the magnetic gap. The part with lower magnetic conduction efficiency on the vertical portion is removed to form the first installation groove, and then the space is fully utilized by setting the first magnet to improve the magnetic field.

[0073] Optionally, the surface of the first magnet 6122 is flush with the end face of the first installation groove 6121, or the surface of the first magnet 6122 is sunken inward relative to the end face of the first installation groove 6121. This implementation makes the first magnet 6122 not protrude from the first installation groove 6121. On the one hand, the space inside the horn device is limited, and the first magnet located in the first installation groove will not occupy the space outside the original magnetic circuit system. On the other hand, if the first magnet extends out of the first installation groove, it may affect the original magnetic field layout, and the magnetic field intensity and uniformity in the magnetic gap need to be ensured not to be affected. For this reason, it is preferred to set the first magnet in the first installation groove to achieve the effect of improving the magnetic field.

[0074] Optionally, the depth of the first installation groove 6121 is greater than the height of the first magnet 6122, and this structural design makes it convenient to accommodate the first magnet 6122 within the first installation groove 6121.

[0075] Optionally, as Figure 1 shown, the top of the vertical portion 612 is higher than the top of the side magnetic portion. In this implementation, setting the first magnet at the top of the vertical portion 612 can better form a cooperation relationship with the side magnetic portion, thereby strengthening the magnetic field intensity in the magnetic gap 63. If the top of the vertical portion 612 is relatively short, the strengthening effect of the first magnet on the magnetic field intensity in the magnetic gap 63 will be relatively reduced. The part of the vertical portion 612 that is higher than the side magnetic portion can adjust the magnetic field better into the vertical portion 612 through the first magnet, so as to guide the magnetic field in the magnetic gap 63 to pass through the magnetic gap 63 evenly and parallelly at an angle.

[0076] Optionally, the side magnetic portion may include a second magnet 621, and the second magnet 621 is arranged on the bottom plate 611.

[0077] For the magnetic pole distribution mode of the second magnet and the first magnet, optionally, the magnetic pole distribution mode of the second magnet is N pole at the upper part and S pole at the lower part, and the magnetic pole distribution mode of the first magnet is S pole at the upper part and N pole at the lower part.

[0078] Alternatively, optionally, the magnetic pole distribution of the second magnet is an upper S pole and a lower N pole, and the magnetic pole distribution of the first magnet is an upper N pole and a lower S pole.

[0079] Since the T-iron is docked with the lower magnetic pole of the second magnet 621 through the bottom plate 611, the magnetic pole of the vertical portion 612 is equivalent to the lower magnetic pole of the second magnet 621. The above two magnetic pole distribution methods enable the upper magnetic pole of the second magnet to be smoothly guided into the magnetic gap and then to the vertical portion equivalent to the lower magnetic pole of the second magnetic pole. The lower magnetic pole of the first magnet is opposite to the magnetic pole of the vertical portion, further playing a role in guiding the magnetic field to flow smoothly in the vertical portion. In this way, the uniformity of the magnetic field in the magnetic gap is effectively improved, and the magnetic field intensity is also increased under the action of the first magnet.

[0080] Optionally, the first magnet 6122 is higher than the second magnet 621. This design method avoids the interference between the magnetic poles of the same polarity of the first magnet 6122 and the second magnet 621, and reduces the risk of the local original magnetic field layout being disturbed by the first magnet 6122.

[0081] On the other hand, the present application also provides an improvement to the magnetic circuit system from the perspective of the side magnetic part.

[0082] Optionally, the side magnetic part may include a second T-iron, a side magnetic guiding part 622 and a third magnet 6222. As Figure 1 shown, the side magnetic guiding part 622 is arranged above the second T-iron, a second installation groove 6221 is formed on the side of the side magnetic guiding part 622 away from the second T-iron, and the third magnet 6222 is arranged in the second installation groove 6221.

[0083] In Figure 1 the shown embodiment, the second installation groove 6221 is located above the side magnetic guiding part 622, that is, away from the second magnet 621 located below it. The side magnetic guiding part 622 can guide the magnetic field generated by the second magnet 621, so that the magnetic field gathers towards the magnetic gap 63. Since the magnetic field generated by the second magnet 621 deflects towards the magnetic gap after passing through the lower part of the side magnetic guiding part 622, the partial structure of the side magnetic guiding part away from the second magnet cannot fully exert the magnetic guiding effect, and fewer magnetic induction lines pass through here.

[0084] The present application forms a second installation groove in the area of the side magnetic guiding part away from the second magnet, aiming to remove the partial side magnetic guiding part that cannot fully exert the magnetic guiding effect, that is, to form the second installation groove. A third magnet is arranged in the second installation groove, so that the magnetism of the third magnet can act together with the magnetism of the second magnet, and further improve the magnetic field intensity and magnetic field uniformity at the magnetic gap through the side magnetic guiding part.

[0085] For the magnetic pole distribution modes of the second magnet and the third magnet, optionally, the magnetic pole distribution mode of the second magnet is N pole at the upper part and S pole at the lower part, and the magnetic pole distribution mode of the third magnet is N pole at the lower part and S pole at the upper part.

[0086] Alternatively, optionally, the magnetic pole distribution mode of the second magnet is S pole at the upper part and N pole at the lower part, and the magnetic pole distribution mode of the third magnet is S pole at the lower part and N pole at the upper part.

[0087] In the above two design modes, the same magnetic poles of the second magnet and the third magnet face each other, so that the edge magnetic conduction part located between the two can guide the magnetic field horizontally, making the magnetic gap have a strong (high magnetic induction line density) and uniform magnetic field. This design mode is more conducive to the voice coil vibrating under the action of a uniform magnetic field in the magnetic gap, with high vibration accuracy.

[0088] Optionally, the surface of the third magnet 6222 is sunken inward relative to the end face of the second mounting groove 6221; or, the top surface of the third magnet 6222 is flush with the end face of the second mounting groove 6221. This design mode makes the third magnet 6222 not protrude from the second mounting groove 6221, and the third magnet 6222 will not occupy the space outside the original edge magnetic part. In this way, the space occupied by the magnetic circuit system does not increase, while the magnetic field strength and magnetic conduction performance are improved. On the other hand, completely accommodating the third magnet in the second mounting groove can also avoid the original magnetic field distribution being damaged. If the third magnet extends outside the second mounting groove, it may cause the magnetic field to diverge outward, and the magnetic field in the magnetic gap is interfered, which instead affects the magnetic field strength and uniformity in the magnetic gap.

[0089] Optionally, the depth of the second mounting groove 6221 is greater than the height of the third magnet 6222. In this way, the third magnet 6222 can be completely accommodated in the second mounting groove 6221 without protruding and causing defects.

[0090] Optionally, in the embodiment as Figure 1 shown, the second mounting groove 6221 is also located on the side of the edge magnetic part away from the central magnetic part. That is, the second mounting groove 6221 is located at the upper left corner of the left edge magnetic part, and this part of the area is the part of the edge magnetic conduction part 622 where it is most difficult to play the role of magnetic conduction. The magnetic field is horizontally introduced into the magnetic gap 63 by a part of the lower part of the edge magnetic conduction part 622, Figure 1 and the magnetic induction lines generated by the second magnet 621 passing through the second mounting groove 6221 shown are the least. Therefore, this part of the area is opened to form the second mounting groove 6221 for accommodating the third magnet 6222. Figure 1 The second mounting groove 6221 shown is both far from the second magnet 621 and far from the central magnetic part.

[0091] In other embodiments, the second mounting groove may also be only away from the second magnet 621, and the second mounting groove is also formed in the portion close to the central magnetic part, so as to increase the volume of the third magnet.

[0092] Optionally, the second mounting groove 6221 is opened at the corner position of the side magnetic guiding part 622. The second mounting groove 6221 located at the corner position minimizes the space occupied by the side magnetic guiding part 622 and the magnetic circuit system, and utilizes the part of the side magnetic guiding part 622 where it is most difficult to exert the magnetic guiding performance.

[0093] Optionally, the second mounting groove may be in an annular structure, and the third magnet may be arranged at various positions of the annular second mounting groove. The position of the third magnet can be adjusted according to the actual application requirements. This design method improves the layout flexibility of the third magnet, and the layout position of the third magnet along the circumference of the voice coil can be adjusted according to the specific performance of the magnetic circuit system and the vibration component.

[0094] Optionally, the third magnet may also be in an annular structure. The annular third magnet can cooperate more effectively with the central magnetic part and the second magnet to form a uniform and stronger magnetic field in the magnetic gap. So that the voice coil can receive an improved magnetic field in each area along its circumferential direction, thereby improving the acoustic performance of the speaker device.

[0095] Optionally, the width of the magnetic gap between the side magnetic guiding part 622 and the vertical part 612 is smaller than the width of the magnetic gap between the second magnet 621 and the vertical part 612. Since the magnetic field of the second magnet is guided by the side magnetic guiding part and deflected towards the vertical part, more magnetic induction lines flow towards the vertical part through the guidance of the side magnetic guiding part. Reducing the width of the magnetic gap between the side magnetic guiding part and the vertical part helps to improve the uniformity of the magnetic field in the magnetic gap and the consistency of the magnetic field direction. And the relatively larger width of the magnetic gap between the second magnet and the vertical part can reduce the risk that the second magnet and the vertical part are directly magnetically conducted through the magnetic gap, thereby causing a slight change in the magnetic field direction in the magnetic gap.

[0096] Although some specific embodiments of the present application have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A horn device, characterized in that, Comprising: Basket; Vibration assembly, the vibration assembly includes a voice coil, a diaphragm, an annular skeleton and a surround. The annular skeleton has a main body portion and an outer extension portion. The outer extension portion extends radially outward along the main body portion. The diaphragm covers the annular skeleton, the diaphragm is connected to the outer extension portion, the inner edge of the surround is connected to the annular skeleton, the outer edge of the surround is connected to the basket, the diameter of the diaphragm is larger than the diameter of the inner edge of the surround, the voice coil is located within the annular skeleton, and the voice coil forms a connection with the diaphragm; Magnetic circuit system, the magnetic circuit system is arranged within the basket, a magnetic gap is formed in the magnetic circuit system, and the voice coil is located within the magnetic gap; The outer extension portion is used for carrying the diaphragm; The outer extension portion has a planar portion and a bent portion. The planar portion extends radially along the main body portion, and the bent portion extends axially away from the surround along the main body portion. The diaphragm is connected to the bent portion; The inner edge of the surround is connected to the side of the planar portion away from the bent portion.

2. The horn device according to claim 1, wherein The axial height of the bent portion along the main body portion is higher than the height of the main body portion.

3. The horn device according to claim 1, wherein, The inner edge of the surround is connected to the main body portion.

4. The horn device according to claim 1, characterized in that It further includes an outer centering washer. The outer edge of the outer centering washer is connected to the basket, and the inner edge of the outer centering washer is connected to the annular skeleton.

5. The horn device according to claim 4, wherein The inner edge of the outer centering washer is connected to the main body portion.

6. The horn device according to claim 1, wherein, It further includes an inner centering washer. One side edge of the inner centering washer is connected to the vibration assembly, and the other side edge of the inner centering washer forms a connection with the magnetic circuit system.

7. The horn device according to claim 6, wherein, The outer edge of the inner centering washer is connected to the annular skeleton, and the inner edge of the inner centering washer forms a connection with the magnetic circuit system.

8. The horn device according to claim 7, characterized in that, A boss is formed on the main body portion, and the outer edge of the inner centering washer is connected to the boss.

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