speaker

Abstract

This invention belongs to the field of loudspeaker technology and discloses a loudspeaker including a shell, a vibration structure, a magnetic circuit structure, a voice coil, and a magnetic induction coil. The shell includes a main housing, an inner support, and an elastic element. The inner support is connected to the main housing via the elastic element. The vibration structure is connected to the main housing. The magnetic circuit structure includes a yoke, a main magnetic pole structure, and a secondary magnetic pole structure. The main and secondary magnetic pole structures are disposed on the yoke, which is connected to the inner support and suspended in the main housing via the inner support. The voice coil is connected to the vibration structure and can vibrate under the drive of the vibration structure. The magnetic induction coil is arranged around the outer periphery of the voice coil and connected to the main housing. When the magnetic circuit structure vibrates under the action of the voice coil, the magnetic induction coil suppresses the vibration of the magnetic circuit structure through electromagnetic induction. In this invention, the magnetic induction coil connected to the main housing is provided so that when the magnetic circuit structure vibrates, the magnetic induction coil generates electromagnetic induction, thereby generating a force to suppress the vibration of the magnetic circuit structure.

Description

Technical Field

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

[0002] The inner space of the vibrating structure in the loudspeaker serves as the rear cavity, which houses a voice coil, magnetic pole pieces, a magnet, and a yoke. The voice coil is connected to the vibrating structure, while the magnetic pole pieces, magnet, and yoke form a magnetic circuit structure connected to the outer shell supporting the vibrating structure. When alternating current is applied, the voice coil, under the influence of Ampere's force, drives the vibrating structure to vibrate and produce sound. At this time, the magnetic circuit structure formed by the magnetic pole pieces, magnet, and yoke experiences a reverse force, equal in magnitude but opposite in direction to the Ampere force experienced by the voice coil. This reverse force is transmitted through the magnetic circuit structure to the loudspeaker's outer shell, causing excessive vibration in the shell, resulting in degraded sound quality and affecting the user experience. Furthermore, in existing technologies, dedicated vibration damping circuitry is often added to the loudspeaker to reduce vibration, leading to increased power consumption. Summary of the Invention

[0003] The purpose of this invention is to provide a loudspeaker that simplifies the loudspeaker's structure and reduces the impact force of the magnetic circuit structure on the housing while maintaining the same power consumption.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] Speakers, including:

[0006] The outer casing includes a main shell, an inner support body, and an elastic element, wherein the inner support body is connected to the main shell via the elastic element;

[0007] A vibrating structure is connected to the main housing;

[0008] A magnetic circuit structure, comprising a yoke, a main magnetic pole structure, and a secondary magnetic pole structure, wherein the main magnetic pole structure and the secondary magnetic pole structure are disposed on the yoke, and the yoke is connected to the inner support body and suspended in the main housing through the inner support body;

[0009] A voice coil, connected to the vibrating structure, is capable of vibrating under the influence of the vibrating structure.

[0010] A magnetic induction coil is arranged around the outer periphery of the voice coil and connected to the main housing. When the magnetic circuit structure vibrates under the action of the voice coil, the magnetic induction coil suppresses the vibration of the magnetic circuit structure through electromagnetic induction.

[0011] Preferably, the secondary magnetic pole structure is located outside the voice coil, and the magnetic induction coil is arranged around the outer periphery of the secondary magnetic pole structure. This allows the magnetic field of the secondary magnetic pole structure to be cut to generate electromagnetic induction, and the vibration of the magnetic circuit structure to be suppressed by electromagnetic induction.

[0012] Preferably, multiple inner supports are provided, and the yoke is clamped between the multiple inner supports.

[0013] Preferably, the yoke includes a base plate and a plurality of support plates connected to the base plate. The main magnetic pole structure and the secondary magnetic pole structure are both disposed on the base plate and located between the plurality of support plates. The support plates are connected to the inner support body.

[0014] Preferably, at least two of the support plates are disposed opposite to each other on the base plate.

[0015] Preferably, the magnetic pole direction of the main magnetic pole structure is opposite to that of the secondary magnetic pole structure.

[0016] Preferably, the voice coil is disposed around the outer periphery of the main magnetic pole structure.

[0017] Preferably, one of the inner support body and the elastic member is provided with a first protrusion and the other is provided with a first groove, and the first protrusion and the first groove cooperate with each other.

[0018] Preferably, the main housing is provided with a support plate portion, and the inner support body is connected to the support plate portion through the elastic element.

[0019] Preferably, the magnetic induction coil is a ring made of a conductive material.

[0020] The beneficial effects of this invention are:

[0021] By incorporating a suspended magnetic circuit structure within the casing, the overall vibration transmitted from the magnetic circuit structure to the casing during speaker operation is reduced. Furthermore, a magnetic induction coil connected to the main casing induces electromagnetic induction when the magnetic circuit structure vibrates. In the frequency range where the suspension of the magnetic circuit structure could cause resonance, the elastic element dampens the vibration, and the electromagnetic induction generated by the magnetic induction coil further suppresses the resonant force between the magnetic circuit structure and the voice coil. This eliminates the need for internal circuitry within the speaker, simplifying its design and reducing the impact of the magnetic circuit structure on the casing while maintaining constant power consumption. The suspension of the magnetic circuit structure, combined with the elastic element and the magnetic induction coil, reduces the vibration transmitted from the magnetic circuit structure to the casing, improving the speaker's sound stability, thereby enhancing sound quality and the user experience. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the structure of the loudspeaker according to an embodiment of the present invention;

[0023] Figure 2 This is a cross-sectional view of the loudspeaker described in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the loudspeaker structure according to an embodiment of the present invention, omitting the main housing and vibration structure;

[0025] Figure 4 This is a schematic diagram of the speaker structure omitting the housing and vibration structure according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the loudspeaker structure according to an embodiment of the present invention, omitting the housing, vibration structure, and voice coil;

[0027] Figure 6 This is a partial schematic diagram of the cooperation between the yoke, main magnetic pole structure and secondary magnetic pole structure described in the embodiments of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of the yoke described in an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the main housing structure according to an embodiment of the present invention;

[0030] Figure 9 This is a schematic diagram of the structure of the inner support and elastic element in cooperation according to an embodiment of the present invention;

[0031] Figure 10 This is a schematic diagram of the internal support structure described in an embodiment of the present invention;

[0032] Figure 11 This is a schematic diagram of the structure of the elastic element described in an embodiment of the present invention.

[0033] In the picture:

[0034] 1. Outer shell;

[0035] 11. Main shell; 111. Support plate; 112. Second protrusion;

[0036] 12. Inner support body; 121. First protrusion;

[0037] 13. Elastic element; 131. First groove; 132. Second groove;

[0038] 2. Vibrating structure;

[0039] 3. Magnetic circuit structure;

[0040] 31. Yoke; 311. Base plate; 312. Support plate;

[0041] 32. Main magnetic pole structure; 321. Main magnet; 322. Main magnetic pole piece;

[0042] 33. Secondary magnetic pole structure; 331. Secondary magnet; 332. Secondary magnetic pole piece; 3321. First piece; 3322. Secondary piece;

[0043] 4. Voice coil;

[0044] 5. Magnetic induction coil. Detailed Implementation

[0045] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0046] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0049] like Figures 1-11As shown, the present invention provides a loudspeaker, including a housing 1, a vibrating structure 2, a magnetic circuit structure 3, a voice coil 4, and a magnetic induction coil 5. The housing 1 includes a main shell 11, an inner support 12, and an elastic element 13. The inner support 12 is connected to the main shell 11 via the elastic element 13. The vibrating structure 2 is connected to the main shell 11. The magnetic circuit structure 3 includes a yoke 31, a main magnetic pole structure 32, and a secondary magnetic pole structure 33. The main magnetic pole structure 32 and the secondary magnetic pole structure 33 are disposed on the yoke 31, which is connected to the inner support 12 and suspended in the main shell 11 via the inner support 12. The voice coil 4 is connected to the vibrating structure 2 and can vibrate under the drive of the vibrating structure 2. The magnetic induction coil 5 is arranged around the outer periphery of the voice coil 4 and connected to the housing 1. The magnetic circuit structure 3 is used in conjunction with the operation of the voice coil 4. When the magnetic circuit structure 33 vibrates, the secondary magnetic pole structure 33 approaches the magnetic induction coil 5. The magnetic induction coil 5 cuts the magnetic induction lines near the secondary magnetic pole structure 33, generating electromagnetic induction and producing a force opposite to the direction of motion of the magnetic circuit structure 3, thus suppressing the vibration of the magnetic circuit structure 3 and thereby suppressing the vibration of the outer shell 1. When the magnetic circuit structure 3 vibrates and transmits the vibration to the outer shell 1 through the inner support 12, the outer shell 1 drives the magnetic induction coil 5 to move, causing the magnetic induction coil 5 to approach the secondary magnetic pole structure 33. The magnetic induction coil 5 also cuts the magnetic induction lines near the secondary magnetic pole structure 33, generating electromagnetic induction and producing a force opposite to the direction of motion of the outer shell 1, thus suppressing the vibration of the outer shell 1.

[0050] In this invention, by setting a suspended magnetic circuit structure 3 within the outer casing 1, the vibration transmitted from the magnetic circuit structure 3 to the outer casing 1 during speaker operation is reduced. Furthermore, a magnetic induction coil 5 connected to the main casing 11 is provided. When the magnetic circuit structure 3 vibrates, the magnetic induction coil 5 generates electromagnetic induction. In the frequency range where the suspension of the magnetic circuit structure 3 results in poor vibration damping and resonance, the elastic element 13 provides damping, and the electromagnetic induction generated by the magnetic induction coil 5 further suppresses the resonance force between the magnetic circuit structure 3 and the voice coil 4. This eliminates the need for additional circuitry within the speaker, simplifying its structure and reducing the impact of the magnetic circuit structure 3 on the outer casing 1 while maintaining constant speaker power consumption. The suspension of the magnetic circuit structure 3, combined with the elastic element 13 and the magnetic induction coil 5, reduces the vibration transmitted from the magnetic circuit structure 3 to the outer casing 1, improving the stability of speaker operation, thereby enhancing sound quality and user experience.

[0051] Specifically, the elastic element 13 is clamped between the main housing 11 and the inner support 12 in a direction perpendicular to the first direction, and the magnetic circuit structure 3 is inserted between multiple inner supports 12 along the first direction. By providing the elastic element 13 in the housing 1, the impact force of the magnetic circuit structure 3 on the main housing 11 of the housing 1 is reduced when the speaker is operating. The elastic element 13 and the inner support 12 cooperate to limit and support the magnetic circuit structure 3 in the circumferential direction, ensuring the alignment of the magnetic circuit structure 3 and the vibration structure 2 in the first direction, and enabling the magnetic induction coil 5 to more reliably play a vibration damping role in the direction of vibration of the magnetic circuit structure 3.

[0052] More specifically, the main housing 11 is provided with a support plate 111, and the inner support body 12 is connected to the support plate 111 via an elastic member 13. The above arrangement allows the elastic member 13 to be more easily clamped between the main housing 11 and the inner support body 12.

[0053] Specifically, the elastic element 13 is laid inside the main housing 11, and the inner support body 12 and the elastic element 13 are connected to each other. One of the inner support body 12 and the elastic element 13 is provided with a first protrusion 121, and the other is provided with a first groove 131. The first protrusion 121 is embedded in the first groove 131. The first protrusion 121 and the first groove 131 cooperate to increase the reliability of the connection between the inner support body 12 and the elastic element 13, and prevent the inner support body 12 from falling off the elastic element 13 during use.

[0054] More specifically, of the main housing 11 and the elastic member 13, one is provided with a second protrusion 112 and the other is provided with a second groove 132, with the second protrusion 112 embedded in the second groove 132. The above arrangement improves the reliability of the connection between the main housing 11 and the elastic member 13.

[0055] In this embodiment, the support plate portion 111 is disposed in the inner cavity of the main housing 11, and each inner support body 12 is correspondingly provided with at least one support plate portion 111. The first protrusion 121 is disposed on the inner support body 12, and the second protrusion 112 is disposed on the support plate portion 111. The elastic element 13 is made of silicone, and the first groove 131 and the second groove 132 are both disposed on the elastic element 13. In addition to the above-mentioned arrangement, the elastic element 13 can also be made of other injection-molded and elastic materials such as rubber. Along the direction perpendicular to the first direction, the first protrusion 121 is embedded in the first groove 131, and the second protrusion 112 is embedded in the second groove 132.

[0056] Specifically, the vibration structure 2 includes a middle plate and a vibrating plate. The vibrating plate is a ring structure. The outer periphery of the vibrating plate is connected to the main housing 11, and the inner periphery is connected to the middle plate. The voice coil 4 is connected to the vibrating plate.

[0057] Specifically, the magnetic circuit structure 3 includes a yoke 31, a main magnetic pole structure 32, and a secondary magnetic pole structure 33. The yoke 31 is connected to the main housing 11. The main magnetic pole structure 32 is mounted on the yoke 31, and a voice coil 4 is arranged around the outer periphery of the main magnetic pole structure 32. The secondary magnetic pole structure 33 is mounted on the yoke 31, located outside the voice coil 4. A magnetic induction coil 5 is arranged around the outer periphery of the secondary magnetic pole structure 33, capable of generating electromagnetic induction by cutting the magnetic field of the secondary magnetic pole structure 33, and suppressing the vibration of the magnetic circuit structure 3 through electromagnetic induction. The inclusion of the secondary magnetic pole structure 33 ensures sufficient magnetic flux through the magnetic induction coil 5, enabling the generation of sufficient force through electromagnetic induction to suppress the vibration of the magnetic circuit structure 3, thus achieving a good vibration reduction effect.

[0058] More specifically, multiple secondary magnetic pole structures 33 are provided, and the multiple secondary magnetic pole structures 33 are arranged around the outer periphery of the main magnetic pole structure 32. The above arrangement further ensures the magnetic flux passing through the magnetic induction coil 5, making the force on the magnetic induction coil 5 more balanced, and can uniformly reduce the vibration transmitted from the magnetic circuit structure 3 to the outer shell 1.

[0059] Specifically, the yoke 31 includes a base plate 311 and multiple support plates 312 connected to the base plate 311. The main magnetic pole structure 32 and the auxiliary magnetic pole structure 33 are both disposed on the base plate 311 and located between the multiple support plates 312. The support plates 312 are connected to the inner support body 12. This arrangement makes the installation between the yoke 31 and the outer casing 1 more reliable.

[0060] In this embodiment, the magnetic circuit structure 3 is sandwiched between multiple inner supports 12, that is, the multiple support plates 312 of the yoke 31 are sandwiched between multiple inner supports 12, making disassembly and assembly more convenient.

[0061] Specifically, at least two support plates 312 are arranged opposite to each other on the base plate 311, and the magnetic circuit structure 3 is installed in the main housing 11 through the support plates 312, which is simpler and more reliable.

[0062] More specifically, four support plates 312 are provided. One support plate 312 is provided at each end of the base plate 311 in the second direction, and one support plate 312 is provided at each end of the base plate 311 in the third direction. The first direction, the second direction, and the third direction are perpendicular to each other. The yoke 31 is erected in the outer casing 1 through the four support plates 312.

[0063] Specifically, the support plate portions 312 at both ends of the base plate portion 311 in the second direction are the first support plate portions. The first support plate portions are located inside the magnetic induction coil 5. That is, in the second direction, the voice coil 4 and the magnetic induction coil 5 are separated by the first support plate, saving other isolation structures and making full use of the structure of the yoke 31.

[0064] More specifically, the support plates 312 at both ends of the base plate 311 in the third direction are the second support plates. There are two auxiliary magnetic pole structures 33. Each second support plate is sandwiched between the main magnetic pole structure 32 and the auxiliary magnetic pole structure 33. The second support plate is located outside the magnetic induction coil 5, that is, in the third direction. The voice coil 4 and the magnetic induction coil 5 are separated by the auxiliary magnetic pole structure 33. The second support plate is fully utilized to guide the magnetic field lines on the outside, so that the electromagnetic induction effect of the magnetic induction coil 5 is stronger.

[0065] In this embodiment, the bottom plate portion 311 of the yoke 31 is a rectangular sheet structure. The second direction is the length direction of the bottom plate portion 311, and the third direction is the width direction of the bottom plate portion 311. The two first support plates and the corresponding support plates 111 and elastic members 13 are located inside the magnetic induction coil 5, and the two second support plates and the corresponding support plates 111 and elastic members 13 are located outside the magnetic induction coil 5. The auxiliary magnetic pole structure 33 is arranged between the second support plates and the main magnetic pole structure 32, and its corresponding size is larger, so that the electromagnetic induction effect of the magnetic induction coil 5 is stronger.

[0066] Specifically, the magnetic pole direction of the main magnetic pole structure 32 is opposite to that of the secondary magnetic pole structure 33, thereby ensuring the magnetic flux passing through the voice coil 4. This allows the vibration transmitted from the magnetic circuit structure 3 to the main housing 11 to be reduced through the electromagnetic induction of the magnetic induction coil 5 while maintaining the normal operation of the voice coil 4 and the normal sound output of the loudspeaker.

[0067] More specifically, the main magnetic pole structure 32 includes a main magnet 321 and a main magnetic pole piece 322. The main magnet 321 is ring-shaped and is disposed on the side of the yoke 31 facing the vibration structure 2, and the main magnetic pole piece 322 is ring-shaped and is disposed on the side of the main magnet 321 facing the vibration structure 2.

[0068] More specifically, the secondary magnetic pole structure 33 includes a secondary magnet 331 and a secondary magnetic pole structure 33. The secondary magnet 331 is elongated and disposed on the side of the yoke 31 facing the vibration structure 2, and the secondary magnetic pole piece 332 is elongated and disposed on the side of the secondary magnet 331 facing the vibration structure 2.

[0069] In this embodiment, the secondary magnetic pole piece 332 includes a first piece 3321 and a second piece 3322 connected to each other. The thickness of the first piece 3321 in a first direction is greater than the thickness of the second piece 3322 in the first direction. The first piece 3321 is located away from the main magnetic pole structure 32 relative to the second piece 3322. This arrangement specifically increases the magnetic flux passing through the magnetic induction coil 5, increases the force generated by electromagnetic induction to suppress the vibration of the magnetic circuit structure 3, and has a better vibration reduction effect.

[0070] In the invention, the magnetic induction coil 5 is a ring made of conductive material. Specifically, the ring can be a voice coil, a ring formed by bending a copper sheet, or a ring formed by bending an aluminum sheet. When it is a voice coil, a common voice coil structure can be used, resulting in a stronger electromagnetic induction effect.

[0071] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A loudspeaker, characterized in that, include: The outer shell (1) includes a main shell (11), an inner support (12) and an elastic element (13), wherein the inner support (12) is connected to the main shell (11) through the elastic element (13). Vibration structure (2) is connected to the main housing (11); The magnetic circuit structure (3) includes a yoke (31), a main magnetic pole structure (32) and a secondary magnetic pole structure (33). The main magnetic pole structure (32) and the secondary magnetic pole structure (33) are disposed on the yoke (31). The yoke (31) is connected to the inner support body (12) and suspended in the main shell (11) through the inner support body (12). The voice coil (4) is connected to the vibration structure (2) and can vibrate under the drive of the vibration structure (2); A magnetic induction coil (5) is arranged around the outer periphery of the voice coil (4) and connected to the main housing (11). When the magnetic circuit structure (3) vibrates under the action of the voice coil (4), the magnetic induction coil (5) suppresses the vibration of the magnetic circuit structure (3) through electromagnetic induction. When the magnetic circuit structure (3) vibrates and transmits the vibration to the outer shell (1) through the inner support (12), the outer shell (1) drives the magnetic induction coil (5) to move.

2. The loudspeaker according to claim 1, characterized in that, The secondary magnetic pole structure (33) is located outside the voice coil (4), and the magnetic induction coil (5) is arranged around the outer periphery of the secondary magnetic pole structure (33). It can generate electromagnetic induction by cutting the magnetic field of the secondary magnetic pole structure (33) and suppress the vibration of the magnetic circuit structure (3) through electromagnetic induction.

3. The loudspeaker according to claim 1, characterized in that, Multiple inner supports (12) are provided, and the yoke (31) is sandwiched between multiple inner supports (12).

4. The loudspeaker according to claim 3, characterized in that, The yoke (31) includes a base plate (311) and a plurality of support plates (312) connected to the base plate (311). The main magnetic pole structure (32) and the secondary magnetic pole structure (33) are both disposed on the base plate (311) and located between the plurality of support plates (312). The support plates (312) are connected to the inner support body (12).

5. The loudspeaker according to claim 4, characterized in that, At least two of the support plates (312) are disposed opposite to each other on the base plate (311).

6. The loudspeaker according to claim 1, characterized in that, The magnetic pole direction of the main magnetic pole structure (32) is opposite to that of the secondary magnetic pole structure (33).

7. The loudspeaker according to claim 1, characterized in that, The voice coil (4) is arranged around the outer periphery of the main magnetic pole structure (32).

8. The loudspeaker according to claim 1, characterized in that, Of the inner support (12) and the elastic member (13), one is provided with a first protrusion (121) and the other is provided with a first groove (131), and the first protrusion (121) cooperates with the first groove (131).

9. The loudspeaker according to claim 1, characterized in that, The main housing (11) is provided with a support plate (111), and the inner support body (12) is connected to the support plate (111) through the elastic member (13).

10. The loudspeaker according to any one of claims 1-9, characterized in that, The magnetic induction coil (5) is a ring made of conductive material.

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