loudspeaker

Abstract

The application belongs to the technical field of loudspeakers, and discloses a loudspeaker, which comprises a shell, a vibration structure, a magnetic circuit structure, a voice coil and a bridging structure, the vibration structure is arranged on the shell, the magnetic circuit structure comprises a yoke and a magnetic pole structure arranged on the yoke, the voice coil comprises a main voice coil and at least one auxiliary voice coil, the main voice coil is connected to the vibration structure, the auxiliary voice coil is connected to the shell, the directions of the acting forces exerted on the magnetic circuit structure by the main voice coil and the auxiliary voice coil are opposite when the main voice coil and the auxiliary voice coil work, the bridging structure comprises a cantilever and a first elastic pad, the yoke is provided with cantilevers at two ends, the yoke is suspendedly arranged in the shell and connected to the shell through the cantilevers, and the first elastic pad is connected to the shell and the yoke. In the application, the magnetic circuit structure has a certain degree of elasticity on the basis of not changing the material of the magnetic circuit structure through the arrangement of the cantilevers, and then the auxiliary voice coil can fully play a shock-absorbing role, so that the impact force of the magnetic circuit structure on the shell can be effectively reduced when the loudspeaker works.

Description

[0001] This invention is a divisional application of Chinese Patent No. 202310397326.1, filed on April 14, 2023, entitled "Speaker". Technical Field

[0002] This invention relates to the field of loudspeaker technology, and more particularly to a loudspeaker. Background Technology

[0003] The inner space of the vibrating structure on the loudspeaker serves as the rear cavity, which houses the voice coil, magnetic pole pieces, magnet, and 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 action of Ampere 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, the magnitude of which is equal to the Ampere force experienced by the voice coil, but in the opposite direction. This reverse force is ultimately transmitted to the loudspeaker's outer shell, causing the shell to vibrate excessively, resulting in damage to the sound quality and affecting the user experience. Summary of the Invention

[0004] The purpose of this invention is to provide a loudspeaker that can reduce the impact force of the magnetic circuit structure on the housing when the loudspeaker is producing sound.

[0005] To achieve this objective, the present invention adopts the following technical solution: Speakers, including: shell; A vibration structure is disposed on the outer shell; A magnetic circuit structure, including a yoke and a magnetic pole structure disposed on the yoke; The voice coil includes a main voice coil and at least one auxiliary voice coil. The main voice coil is connected to the vibrating structure, and the auxiliary voice coil is connected to the housing. When the main voice coil and the auxiliary voice coil are energized, they exert forces on the magnetic circuit structure in opposite directions. A bridging structure is provided, comprising cantilever arms and a first elastic pad. The cantilever arms are respectively provided at both ends of the yoke. The yoke is suspended in the housing and connected to the housing through the cantilever arms. The first elastic pad is formed by filling the gaps between the two cantilever arms, the gaps between the cantilever arms and the yoke, and the gaps between the cantilever arms and the housing with elastic material. The first elastic pad is connected to the housing and the yoke. When the speaker is working, the magnetic circuit structure can vibrate independently relative to the housing under the separation of the bridging structure.

[0006] Preferably, the magnetic pole structure includes: A main magnetic pole structure is disposed on the yoke, and the main voice coil is disposed around the outer periphery of the main magnetic pole structure; A secondary magnetic pole structure is disposed on the yoke and located outside the main voice coil, with each secondary voice coil corresponding to one secondary magnetic pole structure.

[0007] Preferably, there are two secondary voice coils, which are spaced apart, and the primary voice coil is located between the two secondary voice coils.

[0008] Preferably, the secondary magnetic pole structure includes: A first auxiliary magnetic component is disposed on the yoke and located on the outer periphery of the main magnetic pole structure. The first auxiliary magnetic component and the main magnetic pole structure are configured to be magnetized along the vibration direction of the vibration structure. The magnetic pole directions of the first auxiliary magnetic component and the main magnetic pole structure are opposite. The second auxiliary magnetic component is disposed on the yoke and located on the side of the first auxiliary magnetic component away from the main magnetic pole structure. The magnetic pole direction of the second auxiliary magnetic component is parallel to the magnetic pole direction of the main magnetic pole structure.

[0009] Preferably, the first auxiliary magnetic assembly includes a first auxiliary magnet and a first auxiliary magnetic pole piece. The first auxiliary magnet is disposed on the side of the yoke facing the vibration structure, and the first auxiliary magnetic pole piece is disposed on the top surface of the first auxiliary magnet on the side close to the main magnetic pole structure. The second auxiliary magnetic assembly includes a second auxiliary magnet and a second auxiliary magnetic pole piece. The second auxiliary magnet is disposed on the side of the yoke facing the vibration structure and on the side of the first auxiliary magnet away from the main magnetic pole structure. The second auxiliary magnetic pole piece is disposed between the first auxiliary magnet and the second auxiliary magnet.

[0010] Preferably, the secondary magnetic pole structure includes: A first auxiliary magnetic component is disposed on the yoke and located on the outer periphery of the main magnetic pole structure. The first auxiliary magnetic component and the main magnetic pole structure are configured to be magnetized along the vibration direction of the vibration structure. The magnetic pole directions of the first auxiliary magnetic component and the main magnetic pole structure are opposite. The second auxiliary magnetic component is disposed on the yoke and located on the side of the first auxiliary magnetic component away from the main magnetic pole structure. The magnetic pole direction of the second auxiliary magnetic component is perpendicular to the magnetic pole direction of the main magnetic pole structure.

[0011] Preferably, the end of the main magnetic pole structure facing the vibration structure is the N pole, and the end away from the vibration structure is the S pole; the end of the second auxiliary magnetic component facing the main magnetic pole structure is the N pole, and the end away from the main magnetic pole structure is the S pole.

[0012] Preferably, the system also includes an outer cover, which is connected to the outer shell. The cantilever is connected to the outer shell through the outer cover. The yoke, the cantilever, and the outer cover are integrally formed by hollowing out a plate structure.

[0013] Preferably, the bridging structure further includes a second elastic pad sandwiched between the housing and the yoke.

[0014] Preferably, the bridging structure further includes a plurality of inner supports, which are connected to the outer shell via the second elastic pad, and the yoke is clamped between the plurality of inner supports.

[0015] The beneficial effects of this invention are: By setting a bridging structure to separate the outer shell and the magnetic circuit structure, the cantilever in the bridging structure can act like a spring, reducing the contact area between the magnetic circuit structure and the outer shell, thereby reducing the vibration transmitted from the magnetic circuit structure to the outer shell. The first elastic pad in the bridging structure increases the damping of the magnetic circuit structure, further reducing the force on the outer shell when the magnetic circuit structure vibrates. The first elastic pad acts like a spring, so the rigidity of the yoke can be reduced accordingly. When energized, an alternating current is applied to the main voice coil, causing it to exert an Ampere force on the magnetic circuit structure, thus causing the magnetic circuit structure to resonate. The secondary voice coil is connected to the outer shell. When energized, an alternating current is applied to the secondary voice coil in the opposite direction to the current in the main voice coil, causing it to exert an Ampere force on the magnetic circuit structure in the opposite direction to the Ampere force applied by the main voice coil, thus suppressing the resonance generated by the magnetic circuit structure. By setting the cantilever and the first elastic pad, the magnetic circuit structure can have a certain degree of elasticity without changing the material of the magnetic circuit structure, thus allowing the secondary voice coil to fully exert its damping effect. Therefore, the cantilever, the first elastic pad, and the secondary voice coil work together to effectively reduce the impact of the magnetic circuit structure on the housing when the speaker is producing sound, and ensure the sound quality of the speaker by reducing the excessive vibration of the housing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the speaker structure described in Embodiment 1; Figure 2 This is a schematic diagram of the outer shell described in Embodiment 1; Figure 3 This is a schematic diagram of the speaker described in Embodiment 1, omitting the outer casing and vibration structure. Figure 4 This is a cross-sectional view of the loudspeaker described in Embodiment 1; Figure 5 This is a partial magnetic field line distribution diagram of the magnetic circuit structure described in Embodiment 1; Figure 6 This is a schematic diagram of the loudspeaker described in Embodiment 1, omitting the housing, vibration structure, and voice coil. Figure 7 This is a schematic diagram of the loudspeaker described in Embodiment 1, omitting the outer shell, vibration structure, voice coil, and auxiliary magnetic pole structure. Figure 8 This is a cross-sectional view of the loudspeaker described in Embodiment 2; Figure 9 This is a partial magnetic field line distribution diagram of the magnetic circuit structure described in Embodiment 2; Figure 10 This is a cross-sectional view of the loudspeaker described in Embodiment 3; Figure 11 This is a schematic diagram of the outer shell described in Embodiment 3; Figure 12 This is a cross-sectional view of the loudspeaker described in Embodiment 4; Figure 13 This is an exploded view of a portion of the structure of the loudspeaker described in Embodiment 4; Figure 14 This is an exploded view of the inner support and the second elastic pad as described in Embodiment 4. Figure 15 This is a schematic diagram of the structure of an internal support body as described in Embodiment 4; Figure 16 This is a schematic diagram of the structure of a second elastic pad as described in Embodiment 4; Figure 17 This is an exploded view of another type of inner support and another type of second elastic pad as described in Embodiment 4; Figure 18 This is a schematic diagram of another type of internal support structure described in Embodiment 4; Figure 19 This is a schematic diagram of the yoke structure described in Example 4; Figure 20 This is a cross-sectional view of the loudspeaker described in Embodiment 5; Figure 21 This is a schematic diagram of the loudspeaker described in Embodiment 5, omitting the housing, vibration structure, and bridging structure. Figure 22 This is a schematic diagram of the loudspeaker described in Embodiment 5, omitting the housing, vibration structure, main voice coil, and bridging structure. Figure 23 This is a cross-sectional view of the loudspeaker described in Embodiment Six; Figure 24 This is a cross-sectional view of the loudspeaker described in Embodiment 7; Figure 25 This is a schematic diagram of the speaker structure described in Embodiment 7; Figure 26 This is a schematic diagram of the loudspeaker described in Embodiment 7, omitting the outer casing and vibration structure; Figure 27This is a schematic diagram of the yoke, outer cover, and bridging structure described in Embodiment 7.

[0017] In the picture: 1. Outer shell; 100. Receiving cavity; 101. Sound output port; 102. Bearing port; 11. First arm; 2. Vibrating structure; 3. Magnetic circuit structure; 31. Yoke; 311. Base plate; 312. Support plate; 32. Main magnetic pole structure; 321. Main magnet; 322. Main magnetic pole piece; 33. Secondary magnetic pole structure; 331. Secondary magnet; 3311. First secondary magnet; 3312. Secondary secondary magnet; 332. Secondary magnetic pole piece; 3321. First secondary magnetic pole piece; 3322. Secondary secondary magnetic pole piece; 4. Vowel; 41. Tonic Vowel; 41a. First Tonic Vowel; 42. Secondary Vowel; 42a. First Secondary Vowel; 42b. Secondary Vowel; 5. Bridging structure; 51. Cantilever; 511. First connecting section; 512. Second connecting section; 513. Third connecting section; 52. Second elastic pad; 521. Boss; 522. Notch; 523. Extended protrusion; 524. Protrusion; 525. Groove; 53. Inner support; 531. Support rod portion; 5311. First connecting portion; 5311a. Planar portion; 5311b. Inclined portion; 5311c. First stepped groove; 5312. Second connecting portion; 5312a. Second stepped groove; 532. First limiting portion; 533. First cavity; 534. Second limiting portion; 535. Second cavity; 54. First elastic pad; 6. Outer cover; 61. Vent; 7. Magnetic induction coil. Detailed Implementation

[0018] 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.

[0019] 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.

[0020] 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.

[0021] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1 like Figures 1-7 As shown, this embodiment provides a loudspeaker, including a housing 1, a vibrating structure 2, a magnetic circuit structure 3, a voice coil 4, and a bridging structure 5. The vibrating structure 2 is disposed on the housing 1. The magnetic circuit structure 3 includes a yoke 31 and magnetic pole structures disposed on the yoke 31. The voice coil 4 is connected to the vibrating structure 2 and is movable relative to the magnetic circuit structure 3. The yoke 31 is connected to the housing 1 via the bridging structure 5. When the loudspeaker is operating, the magnetic circuit structure 3 and the housing 1 are connected only through the bridging structure 5. Therefore, when the magnetic circuit structure 3 resonates due to the Ampere force, the vibration can only be transmitted to the housing 1 through the bridging structure 5, allowing the magnetic circuit structure 3 to vibrate independently relative to the housing 1 under the separation of the bridging structure 5.

[0023] In this invention, by setting a bridging structure 5 to separate the outer shell 1 and the magnetic circuit structure 3, the contact area between the magnetic circuit structure 3 and the outer shell 1 is reduced, thereby reducing the vibration transmitted from the magnetic circuit structure 3 to the outer shell 1. Therefore, when the speaker is working, the impact force of the magnetic circuit structure 3 on the outer shell 1 can be effectively reduced, and by reducing the excess vibration of the outer shell 1, the sound quality of the speaker is guaranteed.

[0024] In this embodiment, the outer shell 1 is provided with a receiving cavity 100. One end of the receiving cavity 100 in the first direction is connected to the outside through a sound-emitting port 101, and the other end is connected to the outside through a bearing port 102. The voice coil 4 can move relative to the magnetic circuit structure 3 in the first direction.

[0025] Specifically, the voice coil 4 includes a main voice coil 41 and at least one auxiliary voice coil 42. The main voice coil 41 is connected to the vibrating structure 2 and moves with the vibration structure 2, thereby being able to move relative to the magnetic circuit structure 3 in a first direction. When energized, an alternating current is applied to the main voice coil 41, causing it to exert an Ampere force on the magnetic circuit structure 3, thus causing the magnetic circuit structure 3 to resonate. The auxiliary voice coil 42 is connected to the outer casing 1. When energized, an alternating current is applied to the auxiliary voice coil 42 in the opposite direction to the current in the main voice coil 41, causing it to exert an Ampere force on the magnetic circuit structure 3 in the opposite direction to the Ampere force applied by the main voice coil 41, thus suppressing the resonance generated by the magnetic circuit structure 3. The forces exerted on the magnetic circuit structure 3 by the main voice coil 41 and the auxiliary voice coil 42 when energized are in opposite directions, thereby further reducing the impact force of the magnetic circuit structure 3 on the outer casing 1.

[0026] More specifically, two or more auxiliary voice coils 42 can be provided, and the number of these two or more auxiliary voice coils 42 can be even. Each auxiliary voice coil 42 is connected to the outer shell 1 and is positioned opposite to the outer side of the main voice coil 41. That is, with the main voice coil 41 as the center, two auxiliary voice coils 42 are correspondingly provided at both ends of the main voice coil 41. These two auxiliary voice coils 42 are used as the first auxiliary voice coil group. Then, two more auxiliary voice coils 42 are provided on the side of the first auxiliary voice coil group that is not adjacent to the main voice coil 41. These two auxiliary voice coils 42 are used as the second auxiliary voice coil group, and so on. At least one auxiliary voice coil group can be extended outward from both ends of the main voice coil 41.

[0027] When there are two or more secondary voice coils 42, the secondary voice coils 42 can be positioned relative to the outer side of the main voice coil 41, so that the secondary voice coils 42 apply a uniform reverse Ampere force to the entire magnetic circuit structure 3, thereby uniformly suppressing the resonance of the magnetic circuit structure 3 and avoiding the influence of the deflection and skew of the magnetic circuit structure 3 on the sound quality of the speaker.

[0028] The secondary voice coil 42 is independently set outside the main voice coil 41 as a damping structure and is connected to the housing 1. When alternating current is applied to the secondary voice coil 42 and a reverse Ampere force is generated, it moves independently of the main voice coil 41 and the vibration structure 2, and directly transmits the reverse Ampere force to the housing 1, thereby avoiding affecting the sound quality of the loudspeaker and directly suppressing the vibration of the housing 1.

[0029] The magnetic circuit structure 3 will be explained in detail below.

[0030] Specifically, the magnetic circuit structure 3 includes a yoke 31 and a magnetic pole structure. The magnetic pole structure includes a main magnetic pole structure 32 and a secondary magnetic pole structure 33. The yoke 31 is connected to the outer shell 1. The main magnetic pole structure 32 is disposed on the yoke 31. The main voice coil 41 is arranged around the outer periphery of the main magnetic pole structure 32 and generates an interaction force with the main magnetic pole structure 32 when energized. The secondary magnetic pole structure 33 is disposed on the yoke 31, with the main magnetic pole structure 32 as the center, and is disposed at both ends of the main magnetic pole structure 32, located outside the main voice coil 41.

[0031] When at least two secondary voice coils 42 are provided, the positions of the secondary voice coils 42 can correspond to the positions of the secondary magnetic pole structures 33.

[0032] By setting the secondary magnetic pole structure 33, the magnetic field lines passing through the secondary voice coil 42 can be increased, so that when alternating current is applied, the secondary voice coil 42 can generate a larger reverse Ampere force, thereby improving the damping effect and making the speaker's sound production more stable.

[0033] More specifically, regarding the structure of the yoke 31, the speaker also includes a sheet-like outer cover 6, which is connected to the outer shell 1 by adhesive. The yoke 31, cantilever 51 and outer cover 6 are integrally formed by hollowing out a plate structure, that is, the yoke 31 and cantilever 51 are integrally formed on the outer cover 6. The yoke 31 is only connected to the outer cover 6 through the cantilever 51 at both ends of the third upward direction, so that the magnetic circuit structure 3 is suspended in the outer shell 1.

[0034] Specifically, the main magnetic pole structure 32 includes a main magnet 321 and a main magnetic pole piece 322. The main magnet 321 is disposed on the side of the yoke 31 facing the vibrating structure 2, the main magnetic pole piece 322 is disposed on the main magnet 321, and the main voice coil 41 is disposed around the outer periphery of the main magnet 321 and the main magnetic pole piece 322.

[0035] More specifically, the secondary magnetic pole structure 33 includes a first secondary magnetic assembly, which includes a first secondary magnet 3311 and a first secondary magnetic pole piece 3321. The first secondary magnet 3311 is disposed on the side of the yoke 31 facing the vibrating structure 2, and the first secondary magnetic pole piece 3321 is disposed on the side of the first secondary magnet 3311 near the main magnetic pole structure 32. The area of ​​the first secondary magnetic pole piece 3321 is less than or equal to the upper surface area of ​​the first secondary magnet 3311. When the area of ​​the first secondary magnetic pole piece 3321 is less than the upper surface area of ​​the first secondary magnet 3311, the secondary voice coil 42 can move downwards into the gap formed by the upper surface of the first secondary magnet 3311 and the first secondary magnetic pole piece 3321 during movement. This gap can be used to extend the movement path of the secondary voice coil 42.

[0036] A main magnetic gap is formed between the first auxiliary magnetic component and the main magnetic pole structure 32. The main voice coil 41 is suspended within the main magnetic gap and passes through it during movement. When one auxiliary voice coil 42 is provided, the positions of a set of opposite edges of the auxiliary voice coil 42 can correspond to the position of the first auxiliary magnetic component, and the auxiliary voice coil 42 can be arranged around the outside of the first auxiliary magnetic component. When at least two auxiliary voice coils 42 are provided, the positions of the auxiliary voice coils 42 can correspond to the positions of the first auxiliary magnetic component, and the auxiliary voice coils 42 can be distributed around the outside of the first auxiliary magnetic component.

[0037] In this embodiment, the magnetic pole direction of the first auxiliary magnetic assembly, which consists of the first auxiliary magnet 3311 and the first auxiliary magnetic pole piece 3321, is opposite to the magnetic pole direction of the main magnetic pole structure 32. This can prevent the reduction of magnetic flux in the main voice coil 41, thereby achieving vibration reduction while ensuring the sound quality of the loudspeaker.

[0038] Specifically, the secondary magnetic pole structure 33 further includes a second secondary magnetic assembly, which comprises a second secondary magnet 3312 and a second secondary magnetic pole piece 3322. A secondary magnetic gap is formed between the first and second secondary magnetic assemblies. The second secondary magnet 3312 is positioned on the side of the yoke 31 facing the vibrating structure 2, and on the side of the first secondary magnet 3311 facing away from the main magnetic pole structure 32. The second secondary magnetic pole piece 3322 is disposed within the secondary magnetic gap. The distance between the first and second secondary magnetic assemblies within the secondary magnetic gap is less than or equal to the outer diameter of the secondary voice coil 42. Therefore, during movement, the secondary voice coil 42 will simultaneously approach the upper surfaces of both the first and second secondary magnetic assemblies.

[0039] When a single secondary voice coil 42 is provided, the positions of a set of opposite sides of the secondary voice coil 42 can correspond to the positions of the secondary magnetic gap. The secondary voice coil 42 can be arranged around the outside of the first secondary magnetic assembly and located inside the second secondary magnetic pole assembly. When at least two secondary voice coils 42 are provided, the positions of the secondary voice coils 42 can correspond to the positions of the secondary magnetic gaps, and the secondary voice coils 42 can move closer to the secondary magnetic gaps when they move.

[0040] More specifically, the magnetic pole direction of the second auxiliary magnetic assembly, consisting of the second auxiliary magnet 3312 and the second auxiliary magnetic pole piece 3322, is opposite to that of the main magnetic pole structure 32. This prevents a reduction in the magnetic flux in the main voice coil 41 and increases the magnetic flux passing through the auxiliary voice coil 42 during its movement, thereby achieving vibration reduction while ensuring the sound quality of the loudspeaker.

[0041] In this embodiment, as Figure 4The markings of the N and S poles indicate a magnetic pole arrangement where the N pole of the main magnetic pole structure 32, composed of the main magnet 321 and the main magnetic pole piece 322, faces upward and the S pole faces downward. The S pole of the magnetic pole structure composed of the first auxiliary magnet 3311 and the first auxiliary magnetic pole piece 3321 faces upward and the N pole faces downward. The S pole of the magnetic pole structure composed of the second auxiliary magnet 3312 and the second auxiliary magnetic pole piece 3322 faces upward and the N pole faces downward.

[0042] Specifically, the main voice coil 41 and the auxiliary voice coil 42 are energized in opposite directions. For example... Figure 5 As shown, viewed from the cross-sectional direction, the segment on one side of the main voice coil 41 is the first main tone section 41a, and the secondary voice coil 42 is divided into two parallel segments: the first secondary tone section 42a and the second secondary tone section 42b. The first main tone section 41a and the first secondary tone section 42a are adjacent. When the main voice coil 41 and the secondary voice coil 42 are supplied with currents in opposite directions, the currents in the first main tone section 41a and the first secondary tone section 42a are in the same direction. Figure 5 As indicated by the magnetic field lines, the magnetic field lines passing through the first main tone section 41a and the first secondary tone section 42a are in opposite directions. Therefore, when energized, the forces acting on the first main tone section 41a and the first secondary tone section 42a are in opposite directions. When the main voice coil 41 and the secondary voice coil 42 are supplied with currents in opposite directions, the currents in the first secondary tone section 42a and the second secondary tone section 42b are in opposite directions, the magnetic field lines passing through the first secondary tone section 42a and the second secondary tone section 42b are in opposite directions, and the forces acting on the first secondary tone section 42a and the second secondary tone section 42b are in the same direction.

[0043] When the loudspeaker of the present invention is working, alternating current is supplied to the main voice coil 41 and alternating current in the opposite direction is supplied to the auxiliary voice coil 42. At this time, the Ampere force on the main voice coil 41 and the Ampere force on the auxiliary voice coil 42 are in opposite directions. The magnitude of the resultant force on the main voice coil 41 and the auxiliary voice coil 42 is the same as the magnitude of the force on the magnetic circuit structure 3. The direction of the force on the magnetic circuit structure 3 is opposite to the direction of the resultant force on the main voice coil 41 and the auxiliary voice coil 42.

[0044] In this invention, AC power can be applied to the secondary voice coil 42 in the resonant frequency band, while AC power is not applied to the secondary voice coil 42 in other frequency bands. When AC power is applied to the secondary voice coil 42, an AC voltage of 1V with the opposite energizing direction to the primary voice coil 41 can be applied to it. In this case, the force on the speaker housing 1 in the resonant frequency band will be greatly reduced. Furthermore, the energizing power of both secondary voice coils 42 can be adjusted in both frequency bands. Theoretically, the voltage can be continuously increased to reduce the force on the speaker housing 1, achieving a full-frequency vibration reduction effect. It should be noted that the energizing voltage can only be within the rated power range of the voice coil 4, i.e., the voltage should not be too high, lest the voice coil 4 be burned out.

[0045] In this embodiment, the vibration structure 2 includes a middle plate and a vibration plate. The vibration plate is a ring structure. The outer periphery of the vibration plate is connected to the outer shell 1, and the inner periphery is connected to the middle plate. The main voice coil 41 is connected to the vibration plate.

[0046] In this embodiment, the bridging structure 5 includes cantilever 51. The magnetic circuit structure 3 has cantilever 51 at both ends in the third direction. The magnetic circuit structure 3 is connected to the outer casing 1 via the cantilever 51 and is suspended within the outer casing 1. The cantilever 51 can function similarly to a spring. By setting the cantilever 51, the magnetic circuit structure 3 can have a certain degree of elasticity without changing its material, thereby allowing the sub-voice coil 42 to fully exert its damping effect.

[0047] Example 2 like Figure 8 and Figure 9 As shown, this embodiment provides a loudspeaker, which differs from Embodiment 1 in that: the magnetic pole direction of the second auxiliary magnetic assembly, which is composed of the second auxiliary magnet 3312 and the second auxiliary magnetic pole piece 3322, is perpendicular to the magnetic pole direction of the main magnetic pole structure 32. This makes the magnetic poles with denser magnetic field lines in the second auxiliary magnetic assembly closer to the path of the auxiliary voice coil 42 during movement. When the auxiliary voice coil 42 moves, it can pass through more magnetic field lines, increasing the magnetic flux passing through the auxiliary voice coil 42, thereby generating a larger reverse Ampere force and better suppressing the resonance of the magnetic circuit structure 3.

[0048] More specifically, in one configuration of magnetic poles, the end of the main magnetic pole structure 32 facing the vibration structure 2 is the N pole, and the end away from the vibration structure 2 is the S pole. The magnetic pole structure formed by the second auxiliary magnet 3312 and the second auxiliary magnetic pole piece 3322 has the end facing the main magnetic pole structure 32 as the N pole and the end away from the main magnetic pole structure 32 as the S pole.

[0049] More specifically, such as Figure 8 As indicated by the labels on the N and S poles, the N pole of the main magnetic pole structure 32, which is composed of the main magnet 321 and the main magnetic pole piece 322, faces upward and the S pole faces downward. The S pole of the magnetic pole structure composed of the first auxiliary magnet 3311 and the first auxiliary magnetic pole piece 3321 faces upward and the N pole faces downward. The N pole of the magnetic pole structure composed of the second auxiliary magnet 3312 and the second auxiliary magnetic pole piece 3322 faces the main magnetic pole structure 32, and the S pole faces away from the main magnetic pole structure 32.

[0050] In this embodiment, the main voice coil 41 and the auxiliary voice coil 42 are energized in opposite directions. For example... Figure 9As shown, viewed from the cross-sectional direction, when the main voice coil 41 and the auxiliary voice coil 42 carry currents in opposite directions, the current directions in the first main voice section 41a and the first auxiliary voice section 42a are the same, the magnetic field lines passing through the first main voice section 41a and the first auxiliary voice section 42a are in opposite directions, and the force directions on the first main voice section 41a and the first auxiliary voice section 42a are opposite. When the main voice coil 41 and the auxiliary voice coil 42 carry currents in opposite directions, the current directions in the first auxiliary voice section 42a and the second auxiliary voice section 42b are opposite. Figure 9 As can be seen from the direction of the magnetic field lines indicated, the magnetic field lines passing through the first sub-tone section 42a and the second sub-tone section 42b are in opposite directions, so that when the power is applied, the first sub-tone section 42a and the second sub-tone section 42b are subjected to the same force direction.

[0051] In this invention, AC power can be applied to the secondary voice coil 42 in the resonant frequency band, while AC power is not applied to the secondary voice coil 42 in other frequency bands. When AC power is applied to the secondary voice coil 42, an AC voltage of 1V with the opposite energizing direction to the primary voice coil 41 can be applied to it. In this case, the force on the speaker housing 1 in the resonant frequency band will be greatly reduced. Furthermore, the energizing power of both secondary voice coils 42 can be adjusted in both frequency bands. Theoretically, the voltage can be continuously increased to reduce the force on the speaker housing 1, achieving a full-frequency vibration reduction effect. It should be noted that the energizing voltage can only be within the rated power range of the voice coil 4, i.e., the voltage should not be too high, lest the voice coil 4 be burned out.

[0052] Example 3 like Figure 10 and Figure 11 As shown, this embodiment provides a loudspeaker, which differs from the first embodiment in that: the bridging structure 5 includes a second elastic pad 52, which is sandwiched between the outer shell 1 and the yoke 31 in a direction perpendicular to the first direction. The second elastic pad 52 provides a better separation effect between the outer shell 1 and the magnetic circuit structure 3, so that the magnetic circuit structure 3 can vibrate more independently relative to the outer shell 1.

[0053] Specifically, a first support arm 11 is provided on the outer shell 1, a magnetic circuit structure 3 is provided in the outer shell 1, a second support arm is provided on the yoke 31, and a second elastic pad 52 is sandwiched between the first support arm 11 and the second support arm in a direction perpendicular to the first direction. Relative to the voice coil 4 moving along the first direction, the second elastic pad 52 is sandwiched between the first support arm 11 of the outer shell 1 and the second support arm of the magnetic circuit structure 3 in a direction perpendicular to the first direction, thereby reducing the offset of the magnetic circuit structure 3 in a direction perpendicular to the first direction and ensuring the alignment of the voice coil 4 with respect to the magnetic circuit structure 3.

[0054] Specifically, the magnetic circuit structure 3 includes a yoke 31, a main magnet 321, and a main pole piece 322. The main magnet 321 is positioned on the side of the yoke 31 facing the vibrating structure 2, and the main pole piece 322 is laid on the same side. The yoke 31, main magnet 321, and main pole piece 322 work together to generate a magnetic circuit, allowing the voice coil 4 to experience an Ampere force when energized. By adjusting the mass of at least one of these structures, the resonant frequency of the magnetic circuit structure 3 can be adjusted, thereby producing different vibration damping effects.

[0055] More specifically, the yoke 31 includes a base plate 311 and a support plate 312 connected to the base plate 311. The main magnet 321 is disposed on the base plate 311, and the support plate 312 serves as a second support arm. The voice coil 4 is arranged around the outside of the main magnet 321 and the main pole piece 322, and is located inside the support plate 312. Forming a second support arm on the yoke 31 avoids interference with the voice coil 4, resulting in a simpler structure and lower manufacturing cost.

[0056] More specifically, multiple support plates 312 are provided, and multiple support plates 312 are arranged around the main magnet 321. Adjacent support plates 312 are spaced apart, resulting in a simple structure and convenient processing.

[0057] In this embodiment, the base plate portion 311 is arranged perpendicular to the first direction, and the support plate portion 312 is arranged parallel to the first direction. The support plate portions 312 of the base plate portion 311 are perpendicular to each other, and four support plate portions 312 are provided, which are respectively located on the edge of the base plate portion 311. Adjacent support plate portions 312 are perpendicular to each other, so that the plate surfaces of the four support plate portions 312 can respectively abut against the second elastic pad 52 on the outside of the voice coil 4.

[0058] Specifically, the second elastic pad 52 is annular and sleeved around the outer periphery of the plurality of support plate portions 312. This arrangement makes the arrangement of the second elastic pad 52 simpler and more convenient. In addition to the above arrangement, the second elastic pad 52 can also be a single strip, with one second elastic pad 52 disposed on each support plate portion 312. During assembly, the corresponding second elastic pad 52 is abutted against the first support arm 11.

[0059] In this embodiment, the second elastic pad 52 is made of silicone and is a ring-shaped silicone pad. In addition, it can also be made of other elastic materials such as rubber.

[0060] Specifically, the first arm 11 and the second arm are one-to-one corresponding, and multiple of them are provided. A corresponding first arm 11 and a second arm abut against the second elastic pad 52 from both sides.

[0061] In this embodiment, the first support arm 11 is disposed inside the outer casing 1, and there are four of them, corresponding to the support plate portion 312. The first support arm 11 is elongated and has an elongated abutment surface.

[0062] Specifically, the loudspeaker also includes an outer cover 6. The outer shell 1 is provided with a cavity that extends through the first direction. The magnetic circuit structure 3, the voice coil 4, and the second elastic pad 52 are located in the cavity. The vibration structure 2 is connected to one end opening of the cavity, and the outer cover 6 is connected to the other end opening of the cavity. The vibration structure 2 and the outer cover 6 cover both ends of the cavity, protecting the magnetic circuit structure 3, the voice coil 4, and the second elastic pad 52 in the cavity, and preventing foreign objects from entering the cavity and affecting the normal operation of the voice coil 4.

[0063] More specifically, the outer cover 6 is provided with a vent 61, which allows air to pass through when the speaker is working, so as to balance the internal and external air pressure of the accommodating cavity.

[0064] In this embodiment, the vent 61 and the magnetic circuit structure 3 are arranged facing each other in the first direction. The cross-sectional area of ​​the vent 61 in the first direction is smaller than the cross-sectional area of ​​the magnetic circuit structure 3 in the first direction, so that the projection of the vent 61 in the first direction is completely located on the magnetic circuit structure 3. On the basis of ventilation, this increases the difficulty for foreign objects to enter the accommodating cavity.

[0065] In the speaker of the present invention, adjusting the rigidity of the silicone pad and the mass of the magnetic circuit structure 3 can change the resonant frequency of the magnetic circuit structure 3. Different resonant frequencies will produce different damping effects.

[0066] The rigidity of a silicone pad is related to the shape and material of the silicone itself. Increasing the width of the silicone pad, decreasing its height, and using a softer silicone material can reduce its rigidity, while the opposite will increase it. The shape of the silicone pad can be determined according to the speaker structure.

[0067] Specifically, the resonant frequency of magnetic circuit structure 3 is A, and the resonant frequency of the loudspeaker is B. The value of A ranges from 77%B to 123%B. Considering the actual manufacturing and tuning costs of the loudspeaker, the value of A can be between 77%B and 100%B or between 100%B and 123%B.

[0068] In this invention, the relationship between the resonant frequency of the magnetic circuit structure 3 and the resonant frequency of the speaker is analyzed to determine the different effects of the vibration reduction effect on the vibration reduction effect.

[0069] When the speaker's resonant frequency is 520Hz and the mass of magnetic circuit structure 3 is 3.4g, the rigidity of the six sets of silicone pads and their corresponding resonant frequencies of magnetic circuit structure 3 are set as follows: 1. Silicone pad rigidity is 12.08N / mm, magnetic circuit structure 3 resonant frequency is 300Hz; 2. Silicone pad rigidity is 21.48N / mm, magnetic circuit structure 3 resonant frequency is 400Hz; 3. Silicone pad rigidity is 30.92N / mm, magnetic circuit structure 3 resonant frequency is 480Hz; 4. Silicone pad rigidity is 36.35N / mm, magnetic circuit structure 3 resonant frequency is 520Hz; 5. Silicone pad rigidity is 48.32N / mm, magnetic circuit structure 3 resonant frequency is 600Hz; 6. Silicone pad rigidity is 65.77N / mm, magnetic circuit structure 3 resonant frequency is 700Hz.

[0070] Based on the six sets of settings, a vibration reduction simulation experiment was conducted. The results show that when the resonant frequency of magnetic circuit structure 3 is between 400Hz and 640Hz, it exhibits superior vibration reduction. When the resonant frequency of magnetic circuit structure 3 is 480Hz, the stress on the outer shell 1 is minimal, resulting in the best vibration reduction effect. At this point, the resonant frequency of magnetic circuit structure 3 is 40Hz lower than the speaker's resonant frequency. The resonant frequency of magnetic circuit structure 3 should not deviate excessively from the speaker's resonant frequency; a large frequency difference will lead to excessive stress on the speaker's outer shell 1 during magnetic circuit resonance, resulting in poor vibration reduction. Therefore, the vibration reduction effect is better when the difference between the resonant frequency of magnetic circuit structure 3 and the speaker's resonant frequency is less than 23%. Considering the speaker's production and tuning costs, the specific difference between the resonant frequency of magnetic circuit structure 3 and the speaker's resonant frequency should be between [-23%, 0) or (0, 23%).

[0071] Example 4 like Figures 12-19 As shown, this embodiment provides a loudspeaker, which differs from Embodiment 1 in that: The loudspeaker provided by the present invention includes a housing 1 and a second elastic pad 52, an inner support 53, and a magnetic circuit structure 3 connected sequentially from the outside of the housing 1 inwards; the magnetic circuit structure 3 includes a yoke 31, which is suspended in the inner cavity of the housing 1; the inner support 53 includes a support rod portion 531, with the support rod portion 531 facing the yoke 31 on one side (corresponding to...). Figure 14 The first connecting portion 5311 is formed on the left side of the second elastic pad 52. The first connecting portion 5311 is connected to the yoke 31. The strut portion 531 faces the other side of the second elastic pad 52 (corresponding to the left side of the second elastic pad 52). Figure 14 The right side of the second connecting portion 5312 is formed, and the second connecting portion 5312 is connected to the second elastic pad 52.

[0072] The present invention provides an inner support body 53 between the yoke 31 and the second elastic pad 52. The first connecting part 5311 of the support rod part 531 of the inner support body 53 is connected to the yoke 31, and the second connecting part 5312 of the support rod part 531 is connected to the second elastic pad 52. Thus, the yoke 31 is connected to the outer shell 1 in sequence through the first connecting part 5311, the second connecting part 5312, and the second elastic pad 52 of the inner support body 53. This not only reduces the vibration of the speaker but also improves the reliability of the yoke 31 installation and extends the service life of the speaker.

[0073] In this invention, the first connecting portion 5311 includes a planar portion 5311a connected to the yoke 31 and an inclined portion 5311b extending in a direction away from the planar portion 5311a and gradually moving away from the yoke 31. The inclined portion 5311b is spaced apart from the yoke 31. That is, combined with... Figure 14 and Figure 15 As shown, the first connecting portion 5311 is formed into a wedge-shaped structure that is wider at the top and narrower at the bottom. The upper part of the first connecting portion 5311 (corresponding to...) Figure 14 The upper part of the inner support 53 is a flat part 5311a, which is connected to the yoke 31. The material of the inner support 53 can be the same as that of the outer shell 1, and its hardness is greater than that of the second elastic pad 52. This can improve the reliability of the connection between the inner support 53 and the yoke 31, prevent the yoke 31 from detaching from the shell structure when the sound-generating device is dropped, and extend the service life of the sound-generating device. The lower part of the first connecting part 5311 (corresponding to the lower part of the first connecting part 5311) is a flat part 5311a, which is connected to the yoke 31. Figure 14 The lower part is a sloping part 5311b, which is spaced apart from the yoke 31, that is, it does not contact the yoke 31. In this way, while ensuring the connection strength between the yoke 31 and the first connecting part 5311, the contact area between the yoke 31 and the inner support body 53 is minimized, thereby avoiding the reaction force of the yoke 31 from being transmitted to the outer shell 1, and further improving the vibration damping performance of the speaker.

[0074] Specifically, the inner support body 53 surrounds the inner support cavity, with the inclined portion 5311b facing the inner support cavity. When the magnetic circuit structure 3 presses against the inclined portion 5311b in the first direction, the inner support body 53 presses against the second elastic pad 52. By providing the inclined portion 5311b, the magnetic circuit structure 3 can be more easily inserted into the inner support cavity. During the insertion process along the first direction, the magnetic circuit structure 3 presses against the inclined portion 5311b, causing the multiple inner support bodies 53 to move away from each other, expanding the inner support cavity until the magnetic circuit structure 3 is inserted into place.

[0075] More specifically, the first limiting part 532 and the second limiting part 534 constitute a limiting part, and the magnetic circuit structure 3 abuts against the limiting part in the first direction. By providing the limiting part, the magnetic circuit structure 3 can be accurately positioned in the first direction.

[0076] In this invention, the yoke 31 includes a base plate portion 311 and a support plate portion 312 extending upward from the outer periphery of the base plate portion 311. A planar portion 5311a forms a first stepped groove 5311c that mates with the support plate portion 312. At least a portion of the support plate portion 312 is disposed in the first stepped groove 5311c. That is, the first stepped groove 5311c is provided at the position of the planar portion 5311a of the first connecting portion 5311, such as... Figure 15 As shown, by setting the first step groove 5311c, the reliability of the connection between the yoke 31 and the inner support 53 can be further improved.

[0077] Optionally, the cutting depth of the first stepped groove 5311c can be equal to the thickness of the support plate portion 312, that is, the support plate portion 312 is completely disposed in the first stepped groove 5311c. This arrangement can further improve the connection strength between the yoke 31 and the inner support body 53, but the greater depth of the first stepped groove 5311c requires the inner support body 53 to have a greater thickness, and will also make the volume of the speaker larger; preferably, such as Figure 15 As shown, the cutting depth of the first step groove 5311c can be less than the thickness of the support plate portion 312, that is, the support plate portion 312 is partially disposed in the first step groove 5311c. This arrangement can improve the connection strength between the first connecting portion 5311 and the yoke 31, and at the same time, it does not require increasing the thickness of the inner support body 53, which can save costs.

[0078] It is worth noting that, in order to improve the connection strength between the yoke 31 and the inner support 53, for example, a first protrusion can be provided on the first connecting part 5311; for example, the upper surface of the first connecting part 5311 can be treated to form a rough surface, so as to improve the static friction between the first connecting part 5311 and the yoke 31.

[0079] In this invention, the second elastic pad 52 has a boss 521 on the side facing the inner support 53, and the second connecting portion 5312 forms a second stepped groove 5312a that mates with the boss 521. The boss 521 is disposed in the second stepped groove 5312a. That is to say, as Figure 14 and Figure 16 As shown, by engaging the protrusion 521 of the second elastic pad 52 with the second stepped groove 5312a on the second connecting portion 5312, the connection strength between the second elastic pad 52 and the inner support body 53 can be improved. It is worth noting that the side of the second elastic pad 52 facing the inner support body 53 can also be configured as a groove structure, and the second connecting portion 5312 can correspondingly be configured as a protrusion structure matching the groove structure, thereby allowing the second elastic pad 52 and the inner support body 53 to be connected through a concave-convex structure, further improving the connection strength between the second elastic pad 52 and the inner support body 53.

[0080] Correspondingly, such as Figure 14 , Figure 16and Figure 17 As shown, matching concave and convex structures can also be provided on the side of the second elastic pad 52 facing the outer shell 1 and on the inner wall of the outer shell 1 to further improve the connection strength between the second elastic pad 52 and the outer shell 1.

[0081] In one embodiment of the present invention, the inner support 53 is formed as an integral frame structure adapted to the outer shell 1 (not shown in the figure). That is, after the inner support 53 and the outer shell 1 are integrally molded by injection molding, it is only necessary to cut off the plastic connecting the inner support 53 and the outer shell 1 before assembly, which has the advantage of convenient assembly.

[0082] In another embodiment of the present invention, there are multiple inner supports 53, which are arranged around the outer shell 1 in a circumferential direction. That is, as shown in... Figure 13 As shown, after the inner support body 53 and the outer shell 1 are integrally molded by injection molding, the plastic connecting the inner support body 53 and the outer shell 1 needs to be cut off first. Then, the inner support body 53 is cut into multiple sections, and excess material is removed before final assembly. By setting multiple inner supports 53, the utilization rate of the internal cavity space of the outer shell 1 can be improved, and the volume of the speaker can be reduced.

[0083] Specifically, the inner support body 53 also includes two first limiting portions 532, which are respectively disposed at both ends of the first connecting portion 5311. The two first limiting portions 532 extend toward the magnetic circuit structure 3 and form a first cavity 533 with the first connecting portion 5311. At least a portion of the yoke 31 is disposed within the first cavity 533. That is to say, as Figure 14 and Figure 15 As shown, two first limiting portions 532 are formed at both ends of the first connecting portion 5311 of the strut portion 531. The two first limiting portions 532 and the first connecting portion 5311 surround and form a first cavity 533 that can accommodate the yoke 31. The inner wall of the first cavity 533 can be bonded to the end of the yoke 31 or to the outer peripheral wall of the protrusion in the yoke 31, thereby further improving the connection strength between the yoke 31 and the inner support body 53.

[0084] More specifically, the inner support 53 further includes two second limiting portions 534, respectively disposed at both ends of the second connecting portion 5312. The two second limiting portions 534 extend in a direction away from the first limiting portion 532 and together with the second connecting portion 5312 form a second cavity 535. At least a portion of the second elastic pad 52 is disposed within the second cavity 535. That is to say, as Figure 14As shown, two second limiting portions 534 are formed at both ends of the second connecting portion 5312 of the strut portion 531. The two second limiting portions 534 and the second connecting portion 5312 surround and form a second cavity 535 that can accommodate the second elastic pad 52. The end of the second elastic pad 52 can be bonded to the outer peripheral wall of the second cavity 535, thereby further improving the connection strength between the second elastic pad 52 and the inner support body 53.

[0085] More specifically, the second limiting portion 534 has a wedge-shaped surface on the side facing the second elastic pad 52. The wedge-shaped surface extends along the direction towards the bottom plate portion 311 of the yoke 31 and is away from the second elastic pad 52. That is, the wedge-shaped surface is formed as a sloping structure that is wider at the top and narrower at the bottom, taking into account that the second elastic pad 52 is formed by injection molding. Specifically, the method for forming the speaker housing of the present invention is as follows: first, the outer shell 1 and the inner support body 53 are integrally formed by injection molding, and then the second elastic pad 52 is injection molded between the outer shell 1 and the inner support body 53. Since the second limiting portion 534 of the inner support body 53 has a wedge-shaped surface that is wider at the top and narrower at the bottom on the side facing the second elastic pad 52, it is convenient to seal during injection molding, and at the same time, it can prevent silicone from overflowing and improve the fluidity of silicone. It is worth noting that, as Figure 13 As shown, after injection molding, the second elastic pad 52 can also be cut into multiple segments corresponding to the inner support body 53, and excess material can be removed before assembling it with the inner support body 53.

[0086] More specifically, a notch 522 is formed on the side of the second elastic pad 52 facing the second connecting portion 5312, which matches the outer wall of the second limiting portion 534, and the notch 522 fits against the outer wall of the second limiting portion 534. That is to say, as Figure 14 and Figure 16 As shown, a portion of the second elastic pad 52 is disposed within the second cavity 535, and another portion extends out of the second cavity 535. This other portion consists of two extended protrusions 523 located on the side of the second elastic pad 52 away from the inner support body 53. The two extended protrusions 523 and the portion of the second elastic pad 52 disposed within the second cavity 535 form two notches 522. The two notches 522 respectively cooperate with the outer walls of the two second limiting portions 534, thereby further improving the connection strength between the second elastic pad 52 and the inner support body 53.

[0087] Specifically, the second elastic pad 52 includes a plurality of second elastic pads 52, which are spaced apart from each other and arranged around the axial direction of the housing 1. That is, as Figure 13As shown, the second elastic pads 52 are configured as multiple separate units spaced apart from each other. This allows other components to be accommodated in the gaps between adjacent second elastic pads 52, reducing the area occupied by the second elastic pads 52 within the inner cavity of the housing 1, thus facilitating speaker miniaturization. Furthermore, during assembly, compared to the integrated frame-shaped inner support body 53, the separate second elastic pads 52 are easier to connect to the inner support body 53 and the housing 1, improving assembly efficiency.

[0088] In this invention, the second elastic pad 52 is connected to the outer casing 1 via a connecting structure. That is, as... Figure 12 and Figure 13 As shown, to improve the reliability of the connection between the second elastic pad 52 and the outer casing 1, the second elastic pad 52 is disposed between the outer casing 1 and the inner support body 53. Optionally, a connecting structure can be provided on the side of the second elastic pad 52 near the outer casing 1 and between the outer casing 1, so that one side of the second elastic pad 52 is connected to the outer casing 1 through the connecting structure, thereby improving the reliability of the connection between the second elastic pad 52 and the outer casing 1; or a connecting structure can be provided on the other side of the second elastic pad 52 near the inner support body 53 and between the inner support body 53, so that the other side of the second elastic pad 52 is connected to the inner support body 53 through the connecting structure. Preferably, a connecting structure can be provided on the side of the second elastic pad 52 near the outer casing 1 and between the outer casing 1, and a connecting structure can also be provided on the other side of the second elastic pad 52 near the inner support body 53 and between the inner support body 53, thereby improving the reliability of the connection between the outer casing 1, the second elastic pad 52, and the inner support body 53, and extending the speaker's lifespan.

[0089] In one embodiment, the connection structure is formed as an adhesive layer (not shown in the figure). That is, in addition to being connected and installed by static friction, the second elastic pad 52 and the outer shell 1 can also be connected by an adhesive to further improve the connection strength between the second elastic pad 52 and the outer shell 1. The adhesive can be, for example, a commercially available and commonly used reagent with good adhesive strength, and is not specifically limited here.

[0090] In another embodiment, the connection structure is formed as a concave-convex structure. That is, as... Figure 14 and Figure 17 As shown, in addition to being connected and installed through static friction, the second elastic pad 52 and the outer shell 1 can also be connected through a concave-convex structure to further improve the connection strength between the second elastic pad 52 and the outer shell 1. For example, mutually cooperating concave-convex structures can be provided on the second elastic pad 52 and the outer shell 1 respectively, and / or mutually cooperating concave-convex structures can be provided on the second elastic pad 52 and the inner support body 53.

[0091] Specifically, the concave-convex structure includes a protrusion 524 and a groove 525 that matches the protrusion 524. One of the protrusion 524 and the groove 525 is disposed on the second elastic pad 52, and the other is disposed on the outer casing 1. That is to say, as Figure 14 and Figure 17 As shown, for example, a groove 525 can be provided on the side of the second elastic pad 52 facing the outer shell 1, and a protrusion 524 can be provided on the side of the outer shell 1 facing the second elastic pad 52, so that the second elastic pad 52 is connected to the outer shell 1 through the protrusion 524 and the groove 525; for example, a groove 525 can also be provided on the side of the second elastic pad 52 facing the inner support 53, and a protrusion 524 can be provided on the side of the inner support 53 facing the second elastic pad 52, so that the inner support 53 is connected to the second elastic pad 52 through the protrusion 524 and the groove 525. It is worth noting that both sides of the second elastic pad 52 can be provided with grooves 525 or protrusions 524, or one side can be provided with grooves 525 and the other side with protrusions 524, as long as it can form a concave-convex structure with the outer shell 1 to which it is connected, no specific limitation is made here.

[0092] In this embodiment, the second elastic pad 52 is made of silicone. In addition, other injection-molded and elastic materials such as rubber can also be used.

[0093] In this embodiment, the magnetic circuit structure 3 further includes a magnetic pole structure, which includes a main magnet 321, a main magnetic pole piece 322, two auxiliary magnets 331, and two auxiliary magnetic pole pieces 332. The main magnet 321 is ring-shaped and is disposed on the side of the base plate 311 facing the vibration structure 2. 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. The two auxiliary magnets 331 are elongated and are disposed on the side of the base plate 311 facing the vibration structure 2. The main magnet 321 is located between the two auxiliary magnets 331 in a second direction. The auxiliary magnetic pole pieces 332 are elongated. Each auxiliary magnet 331 has one auxiliary magnetic pole piece 332 on the side facing the vibration structure 2. The voice coil 4 is ring-shaped and is disposed around the outer periphery of the main magnet 321 and the main magnetic pole piece 322, and is located between the two auxiliary magnets 331.

[0094] Specifically, the speaker also includes an outer cover 6, and the outer shell 1 is provided with a cavity that extends through in the first direction. The vibration structure 2 is connected to one end opening of the cavity, and the outer cover 6 is connected to the other end opening of the cavity.

[0095] More specifically, the outer cover 6 is provided with a vent 61, which allows air to pass through when the speaker is working, so as to balance the air pressure inside and outside the accommodating cavity. The vent 61 and the magnetic circuit structure 3 are directly opposite each other in the first direction. The cross-sectional area of ​​the vent 61 in the first direction is smaller than the cross-sectional area of ​​the magnetic circuit structure 3 in the first direction, so that the projection of the vent 61 in the first direction is completely located on the magnetic circuit structure 3. On the basis of air passage, it increases the difficulty for foreign objects to enter the accommodating cavity.

[0096] In this embodiment, the speaker also includes a buffer pad, which is sandwiched between the magnetic circuit structure 3 and the outer cover 6 in the first direction. The buffer pad is made of silicone or rubber material, which further reduces the force exerted by the magnetic circuit structure 3 on the outer cover 1 when the speaker is working.

[0097] Example 5 like Figures 20-22 As shown, this embodiment provides a loudspeaker, which differs from Embodiment 4 in that: the voice coil 4 includes a main voice coil 41 and a secondary voice coil 42. The main voice coil 41 is connected to the vibrating structure 2 and can move relative to the magnetic circuit structure 3 in a first direction. The secondary voice coil 42 is arranged around the outer periphery of the main voice coil 41 and connected to the outer shell 1. When the main voice coil 41 and the secondary voice coil 42 are energized, the forces they exert on the magnetic circuit structure 3 are in opposite directions. The main voice coil 41 of the voice coil 4 can drive the vibrating structure 2 to operate and produce sound. The secondary voice coil 42 of the voice coil 4 is connected to the outer shell 1. Relative to the main voice coil 41, the secondary voice coil 42 exerts a force on the magnetic circuit structure 3 in the opposite direction when energized, thereby further reducing the impact force of the magnetic circuit structure 3 on the outer shell 1.

[0098] Specifically, the second elastic pad 52 is sandwiched between the outer shell 1 and the inner support body 53 in a direction perpendicular to the first direction, and the magnetic circuit structure 3 is inserted into the inner support cavity along the first direction. The second elastic pad 52 and the inner support body 53 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 7 to more reliably play a damping role in the first direction.

[0099] More specifically, the outer shell 1 is provided with a first support arm 11, and the inner support body 53 is connected to the first support arm 11 through a second elastic pad 52. The above arrangement allows the second elastic pad 52 to be more easily clamped between the outer shell 1 and the inner support body 53.

[0100] In this embodiment, the first support arm 11 is disposed in the inner cavity of the outer shell 1, and each inner support body 53 is provided with at least one first support arm 11, and the second protrusion 111 is disposed on the first support arm 11.

[0101] Specifically, the main voice coil 41 is arranged around the outer periphery of the main magnet 321 and the main magnetic pole piece 322. Two auxiliary magnets 331 and two auxiliary magnetic pole pieces 332 are located outside the main voice coil 41. The auxiliary voice coil 42 is arranged around the outer periphery of the two auxiliary magnets 331 and the two auxiliary magnetic pole pieces 332. The position of a set of opposing sides in the auxiliary voice coil 42 corresponds to the position of the two auxiliary magnets 331. This arrangement, with the separation of the auxiliary magnets 331 and the auxiliary magnetic pole pieces 332, avoids mutual interference between the main voice coil 41 and the auxiliary voice coil 42, ensuring the magnetic flux passing through both the main voice coil 41 and the auxiliary voice coil 42.

[0102] Specifically, the main magnet 321, the main pole piece 322, the two auxiliary magnets 331, and the two auxiliary pole pieces 332 are all disposed on the base plate 311 and located between multiple support plates 312, which abut against the inner support body 53. This arrangement makes the installation between the yoke 31 and the outer casing 1 more reliable.

[0103] 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 another support plate 312 is provided at each end of the base plate 311 in the third direction. The first, second, and third directions are perpendicular to each other. The yoke 31 is supported within the outer casing 1 using four support plates 312, resulting in a simpler structure while maintaining stability.

[0104] Specifically, the support plates 312 at both ends of the base plate 311 in the third direction are the first support plates. The first support plates are located inside the secondary voice coil 42. That is, in the second direction, the main voice coil 41 and the secondary voice coil 42 are separated by the first support plates, saving other isolation structures and making full use of the structure of the yoke 31.

[0105] More specifically, the support plates 312 at both ends of the base plate 311 in the second direction are the second support plates. The second support plates are located outside the auxiliary voice coil 42. That is, in the second direction, the main voice coil 41 and the auxiliary voice coil 42 are separated by the auxiliary magnet 331 and the auxiliary magnetic pole piece 332. The second support plates are fully utilized to guide the magnetic field lines on the outside, making the electromagnetic induction effect of the auxiliary voice coil 42 stronger.

[0106] In this embodiment, the base plate 311 of the yoke 31 is a rectangular sheet structure. The second direction is the width direction of the base plate 311, and the third direction is the length direction of the base plate 311. The two first support plates and the corresponding first support arms 11 and second elastic pads 52 are located inside the auxiliary voice coil 42, and the two second support plates and the corresponding first support arms 11 and second elastic pads 52 are located outside the auxiliary voice coil 42. The auxiliary magnet 331 is arranged between the second support plates and the main magnet 321, and its corresponding size is larger, which makes the electromagnetic induction effect of the auxiliary voice coil 42 stronger.

[0107] Specifically, the magnetic pole direction of the main magnet 321 is opposite to that of the secondary magnet 331, thereby ensuring the magnetic flux passing through the main voice coil 41 and the secondary voice coil 42.

[0108] In this embodiment, the secondary magnetic pole piece 332 includes a first piece and a second piece connected to each other. The thickness of the first piece in a first direction is greater than the thickness of the second piece in the first direction, and the first piece is located away from the main magnetic pole structure 32 relative to the second piece. This arrangement specifically increases the magnetic flux passing through the secondary voice coil 42.

[0109] When the second elastic pad 52 is set alone, its damping effect cannot cover the resonant frequency range of the speaker. The resonant frequency of the speaker is set as A, and the resonant frequency range includes A. When the speaker of the present invention is working in the resonant frequency range, the secondary voice coil 42 is energized, so that on the basis of energy saving, the secondary voice coil 42 can cooperate with the second elastic pad 52 to play a targeted damping role.

[0110] Example 6 like Figure 23 As shown, this embodiment provides a loudspeaker, which differs from Embodiment 5 in that: the loudspeaker further includes a magnetic induction coil 7, and a voice coil 4 is separately configured and connected to the vibrating structure 2, capable of moving relative to the magnetic circuit structure 3 in a first direction. The magnetic induction coil 7 is not energized, is arranged around the outer periphery of the voice coil 4, and is connected to the outer shell 1. When the magnetic circuit structure 3 vibrates under the action of the voice coil 4, the secondary magnetic pole structure 33 approaches the magnetic induction coil 7. The magnetic induction coil 7 cuts the magnetic induction lines near the secondary magnetic pole structure 33, generating electromagnetic induction and producing a force opposite to the direction of movement of the magnetic circuit structure 3, suppressing the vibration of the magnetic circuit structure 3, thereby suppressing the vibration of the outer shell 1. The vibration of the magnetic circuit structure 3 is suppressed through electromagnetic induction. When the magnetic circuit structure 3 vibrates and transmits the vibration to the outer shell 1 through the inner support 53, the outer shell 1 drives the magnetic induction coil 7 to move, causing the magnetic induction coil 7 to approach the secondary magnetic pole structure 33. The magnetic induction coil 7 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 movement of the outer shell 1, suppressing the vibration of the outer shell 1.

[0111] In this embodiment, a magnetic induction coil 7 is connected to the outer casing 1. When the magnetic circuit structure 3 vibrates, the magnetic induction coil 7 generates electromagnetic induction. In the frequency range where the suspension damping effect of the magnetic circuit structure 3 is poor, leading to resonance, the second elastic pad 52 provides damping, and the electromagnetic induction generated by the magnetic induction coil 7 together suppresses the resonance force between the magnetic circuit structure 3 and the voice coil 4. This eliminates the need for additional circuitry inside the speaker, simplifying the speaker's structure and reducing the impact force of the magnetic circuit structure 3 on the outer casing 1 while maintaining constant speaker power consumption. By suspending the magnetic circuit structure 3 and using the second elastic pad 52 and the magnetic induction coil 7, the vibration transmitted from the magnetic circuit structure 3 to the outer casing 1 is reduced, improving the stability of the speaker's sound production, thereby improving the speaker's sound quality and enhancing the user experience.

[0112] Specifically, the magnetic pole structure includes a main magnetic pole structure 32 and a secondary magnetic pole structure 33. The main magnetic pole structure 32 includes a main magnet 321 and a main magnetic pole piece 322, mounted on a yoke 31. A voice coil 4 is arranged around the outer periphery of the main magnetic pole structure 32. The secondary magnetic pole structure 33 includes a secondary magnet 331 and a secondary magnetic pole piece 332, mounted on the yoke 31 and located outside the voice coil 4. A magnetic induction coil 7 is arranged around the outer periphery of the secondary magnetic pole structure 33. When the voice coil 4 moves, the magnetic circuit structure 3 resonates, causing it to move up and down. When the secondary magnetic pole structure 33 approaches the magnetic induction coil 7, the magnetic induction coil 7 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. The inclusion of the secondary magnetic pole structure 33 ensures sufficient magnetic flux through the magnetic induction coil 7, allowing sufficient force to be generated through electromagnetic induction to suppress the vibration of the magnetic circuit structure 3, resulting in good vibration damping.

[0113] More specifically, multiple secondary magnetic pole structures 33 are provided, and these 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 7, making the forces on the magnetic induction coil 7 more balanced.

[0114] Specifically, the support plates 312 at both ends of the base plate 311 in the third direction are the first support plates. The first support plates are located inside the magnetic induction coil 7, that is, in the third direction, the voice coil 4 and the magnetic induction coil 7 are separated by the first support plate, saving other isolation structures and making full use of the structure of the yoke 31.

[0115] More specifically, the support plates 312 at both ends of the base plate 311 in the second 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 7. That is, in the second direction, the voice coil 4 and the magnetic induction coil 7 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 7 is stronger.

[0116] Specifically, the main magnet 321 is ring-shaped and is disposed on the side of the yoke 31 facing the vibration structure 2. 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. The auxiliary magnet 331 is elongated and is disposed on the side of the yoke 31 facing the vibration structure 2. The auxiliary magnetic pole piece 332 may be elongated and disposed on the side of the auxiliary magnet 331 facing the vibration structure 2.

[0117] In this embodiment, the magnetic induction coil 7 is a voice coil, which utilizes a common voice coil structure, resulting in a stronger electromagnetic induction effect. Besides the above configuration, the magnetic induction coil 7 can also be a ring formed by bending a conductor material, such as a ring formed by bending a copper sheet or an aluminum sheet.

[0118] Example 7 like Figures 24-27 As shown, this embodiment provides a loudspeaker, which differs from Embodiment 1 in that: the main magnetic pole structure 32 includes a main magnet 321 and a main magnetic pole piece 322, and the auxiliary magnetic pole structure 33 includes an auxiliary magnet 331 and an auxiliary magnetic pole piece 332. The main magnet 321 is disposed on the yoke 31, the main magnetic pole piece 322 is disposed on the side of the main magnet 321 facing the vibrating structure 2, the voice coil 4 is disposed separately and surrounds the main magnet 321 and the main magnetic pole piece 322, the auxiliary magnet 331 is disposed on the yoke 31 and located outside the voice coil 4, and the auxiliary magnetic pole piece 332 is disposed on the side of the auxiliary magnet 331 facing the vibrating structure 2 and located outside the voice coil 4.

[0119] In this embodiment, to reduce the weight of the magnetic pole structure, the main magnet 321 and / or the main magnetic pole piece 322 can be configured as a ring structure. There are two auxiliary magnets 331, which are symmetrically arranged on both sides of the main magnet 321. The main magnet 321 is located between the two auxiliary magnets 331 in the second direction. Each auxiliary magnet 331 is equipped with an auxiliary magnetic pole structure, thereby further improving the acoustic performance of the loudspeaker.

[0120] In the loudspeaker of this embodiment, the bridging structure 5 includes cantilever 51. The yoke 31 has cantilever 51 at both ends in a third direction. The yoke 31 is suspended at the bearing port 102 and connected to the outer casing 1 via the cantilever 51. The cantilever 51 allows the magnetic circuit structure 3 to have a certain degree of elasticity without changing the material of the magnetic circuit structure 3, thereby enabling the secondary voice coil 42 to fully exert its damping effect.

[0121] Specifically, the yoke 31 and the cantilever 51 are both located at the bearing port 102, which saves space in the accommodating cavity 100 and allows for an increase in the number of magnetic poles in the magnetic pole structure within the accommodating cavity 100, thereby improving the acoustic performance of the loudspeaker.

[0122] More specifically, at least four cantilever arms 51 are provided, and at least two cantilever arms 51 are provided at each end of the yoke 31 in the third direction. The above arrangement effectively prevents the magnetic circuit structure 3 from deflecting during vibration, thus ensuring the sound quality of the speaker.

[0123] In this embodiment, the cantilever 51 includes a first connecting segment 511, a second connecting segment 512 and a third connecting segment 513 connected in sequence. The first connecting segment 511 is connected to the yoke 31 and the third connecting segment 513 is connected to the outer shell 1.

[0124] The first connecting segment 511, the second connecting segment 512, and the third connecting segment 513 can all be straight segments, or they can include curved segments. The curved segments can be arc-shaped or S-shaped. For example, the first connecting segment 511 and the third connecting segment 513 can be straight segments, while the second connecting segment 512 can be a curved segment. Therefore, the first connecting segment 511, the second connecting segment 512, and the third connecting segment 513 can form a straight segment, a broken line segment, or a curved segment.

[0125] The lengths of the second connecting segment 512, the first connecting segment 511, and the third connecting segment 513 can be equal. The length of the second connecting segment 512 can also be greater than the length of the first connecting segment 511 or the length of the third connecting segment 513, and the straight-line distance between the two endpoints of the second connecting segment 512 can be less than a preset length, which can be half the length of the side connecting the yoke 31 to the cantilever.

[0126] The widths of the first connecting segment 511, the second connecting segment 512, and the third connecting segment 513 can be equal or unequal. Specifically, the width of the first connecting segment 511 can be greater than the width of the second connecting segment 512, and the width of the third connecting segment 513 can be greater than the width of the second connecting segment 512. The width of the second connecting segment 512 can also be greater than the width of either the first connecting segment 511 or the third connecting segment 513. The first connecting segment 511 can be a trapezoidal structure, and the width of the end of the first connecting segment 511 connected to the yoke 31 can be greater than the width of the end of the first connecting segment 511 connected to the second connecting segment 512. The third connecting segment 513 can also be a trapezoidal structure, and the width of the end of the third connecting segment 513 connected to the yoke 31 can be greater than the width of the end of the third connecting segment 513 connected to the second connecting segment 512.

[0127] When the length of the second connecting segment 512 is greater than the length of the first connecting segment 511 or the length of the third connecting segment 513, the length of the cantilever 51 can be increased within a limited space, improving the elasticity of the yoke 31 and thus achieving a better vibration reduction effect.

[0128] Specifically, the distance between the first connecting segments 511 of the two cantilever 51 at one end of the yoke 31 can be equal to the distance between the third connecting segments 513.

[0129] The distance between the first connecting segments 511 of the two cantilever 51s at one end of the yoke 31 can also be greater than the distance between the third connecting segments 513. When the distance between the two first connecting segments 511 is larger, the support for the yoke 31 is more stable, preventing the yoke 31 from deflecting. The distance between the two third connecting segments 513 at one end of the yoke 31 is relatively smaller, ensuring that the yoke 31 has a certain degree of elasticity.

[0130] More specifically, the first connecting segment 511 and the second connecting segment 512 are connected at a first preset angle, and the second connecting segment 512 and the third connecting segment 513 are connected at a second preset angle. The first preset angle and the second preset angle can be the same or different. As a specific embodiment, when the first connecting segment 511, the second connecting segment 512 and the third connecting segment 513 form a broken line segment, the first preset angle can be 90° and the second preset angle can be 90°, so that the length of the cantilever 51 at the same end is increased as much as possible without intersecting, which can improve the elasticity of the yoke 31 and further improve the vibration reduction effect.

[0131] In this embodiment, the yoke 31 has a first symmetry plane and a second symmetry plane. The first symmetry plane is parallel to the first direction and the third direction, and the second symmetry plane is parallel to the first direction and the second direction. The two cantilever arms 51 at one end of the yoke 31 are symmetrically arranged with respect to the first symmetry plane, and the cantilever arms 51 at both ends of the yoke 31 are symmetrically arranged with respect to the second symmetry plane, thereby making the force on the yoke 31 more balanced.

[0132] Specifically, the bridging structure 5 also includes a first elastic pad 54, which is disposed at the bearing port 102, connecting the outer shell 1 and the yoke 31, and sealing the bearing port 102. The first elastic pad 54 can be formed by filling the gaps between the cantilever 51, the gap between the cantilever 51 and the yoke 31, and the gap between the cantilever 51 and the outer shell 1 with elastic material. The thickness of the elastic material can be the same as or less than the side thickness of the cantilever 51. For example, filling the gaps between the cantilever 51, the gap between the cantilever 51 and the yoke 31, and the gap between the cantilever 51 and the outer shell 1 with silicone can form the first elastic pad 54.

[0133] When filling the gaps, an elastic material of a first thickness can be filled into the gaps between the two cantilever 51s, the gaps between the cantilever 51 and the yoke 31, and the gaps between the cantilever 51 and the outer shell 1. In an optional embodiment, the first thickness can be the same as the side thickness of the cantilever 51, or any thickness value less than the side thickness of the cantilever 51, such as half the side thickness of the cantilever 51.

[0134] Different thicknesses of elastic material can be filled into the gaps between pairs of cantilever 51, between cantilever 51 and yoke 31, and between cantilever 51 and outer shell 1. For example, a second thickness of elastic material can be filled into the gaps between pairs of cantilever 51 and between cantilever 51 and yoke 31, while a third thickness can be filled into the gap between cantilever 51 and outer shell 1. Alternatively, a second thickness of elastic material can be filled into the gaps between cantilever 51 and yoke 31, while a third thickness can be filled into the gap between pairs of cantilever 51. The second thickness and the third thickness are different; the second thickness can be greater than the third thickness, or the second thickness can be less than the third thickness.

[0135] The first elastic pad 54 increases the damping of the magnetic circuit structure 3, further reducing the force on the outer shell 1 when the magnetic circuit structure 3 vibrates. The first elastic pad 54 acts as a spring, so the rigidity of the yoke 31 can be reduced accordingly. On this basis, the first elastic pad 54 cooperates with the yoke 31 to seal the bearing port 102, eliminating the need for an additional sealing structure on the outside of the yoke 31, preventing foreign objects from entering the accommodating cavity 100, and saving the height space occupied by the speaker.

[0136] More specifically, the speaker also includes an outer cover 6, which is connected to the outer casing 1 and positioned at the bearing port 102. The yoke 31 is connected to the outer casing 1 via the outer cover 6. By connecting the yoke 31 to the outer cover 6, the yoke 31 is connected to the outer casing 1. The yoke 31 and the outer cover 6 cooperate to cover the bearing port 102, allowing the size of the yoke 31 to be flexibly set according to actual vibration damping requirements. This avoids the problem of needing to set a cantilever 51 of excessive length when connecting to the outer casing 1 due to the yoke 31 being too small.

[0137] More specifically, the yoke 31, cantilever 51, and outer cover 6 are integrally formed by hollowing out a single plate structure, resulting in a more reliable connection, more precise dimensions, and lower cost. In addition to the above configuration, the outer cover 6 and yoke 31 can also be two plate-like structures connected by welding or bonding.

[0138] In this embodiment, the first elastic pad 54 is made of silicone and is injection molded into the hollowed-out area of ​​the plate structure, and connected to the outer shell 1. This process is simple to manufacture and provides a reliable seal. Alternatively, the first elastic pad 54 can also be made of rubber.

[0139] It is understood that the above embodiments can be selectively combined as needed.

[0140] 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: Outer shell (1); Vibration structure (2), the vibration structure (2) is disposed on the outer shell (1); The magnetic circuit structure (3) includes a yoke (31) and a magnetic pole structure disposed on the yoke (31); The voice coil (4) includes a main voice coil (41) and at least one auxiliary voice coil (42). The main voice coil (41) is connected to the vibrating structure (2), and the auxiliary voice coil (42) is connected to the outer shell (1). When the main voice coil (41) and the auxiliary voice coil (42) are energized, the forces they exert on the magnetic circuit structure (3) are in opposite directions. The bridging structure (5) includes a cantilever (51) and a first elastic pad (54). The two ends of the yoke (31) are respectively provided with the cantilever (51). The yoke (31) is suspended in the shell (1) and connected to the shell (1) through the cantilever (51). The elastic material fills the gaps between the two cantilever (51), the gaps between the cantilever (51) and the yoke (31), and the gaps between the cantilever (51) and the shell (1) to form the first elastic pad (54). The first elastic pad (54) is connected to the shell (1) and the yoke (31). When the speaker is working, the magnetic circuit structure (3) can vibrate independently relative to the shell (1) under the separation of the bridging structure (5).

2. The loudspeaker according to claim 1, characterized in that, The magnetic pole structure includes: The main magnetic pole structure (32) is disposed on the yoke (31), and the main voice coil (41) is disposed around the outer periphery of the main magnetic pole structure (32); A secondary magnetic pole structure (33) is disposed on the yoke (31) and located outside the main voice coil (41). Each secondary voice coil (42) is configured with a corresponding secondary magnetic pole structure (33).

3. The loudspeaker according to claim 2, characterized in that, There are two secondary voice coils (42), which are spaced apart, and the primary voice coil (41) is located between the two secondary voice coils (42).

4. The loudspeaker according to claim 2, characterized in that, The secondary magnetic pole structure (33) includes: The first auxiliary magnetic component is disposed on the yoke (31) and located on the outer periphery of the main magnetic pole structure (32). The first auxiliary magnetic component and the main magnetic pole structure (32) are configured to be magnetized along the vibration direction of the vibration structure (2). The magnetic pole directions of the first auxiliary magnetic component and the main magnetic pole structure (32) are opposite. The second auxiliary magnetic component is disposed on the yoke (31) and located on the side of the first auxiliary magnetic component away from the main magnetic pole structure (32). The magnetic pole direction of the second auxiliary magnetic component is parallel to the magnetic pole direction of the main magnetic pole structure (32).

5. The loudspeaker according to claim 4, characterized in that, The first auxiliary magnetic assembly includes a first auxiliary magnet (3311) and a first auxiliary magnetic pole piece (3321). The first auxiliary magnet (3311) is disposed on the side of the yoke (31) facing the vibration structure (2), and the first auxiliary magnetic pole piece (3321) is disposed on the top surface of the first auxiliary magnet (3311) near the main magnetic pole structure (32). The second auxiliary magnetic assembly includes a second auxiliary magnet (3312) and a second auxiliary magnetic pole piece (3322). The second auxiliary magnet (3312) is disposed on the side of the yoke (31) facing the vibration structure (2) and on the side of the first auxiliary magnet (3311) away from the main magnetic pole structure (32). The second auxiliary magnetic pole piece (3322) is disposed between the first auxiliary magnet (3311) and the second auxiliary magnet (3312).

6. The loudspeaker according to claim 2, characterized in that, The secondary magnetic pole structure (33) includes: The first auxiliary magnetic component is disposed on the yoke (31) and located on the outer periphery of the main magnetic pole structure (32). The first auxiliary magnetic component and the main magnetic pole structure (32) are configured to be magnetized along the vibration direction of the vibration structure (2). The magnetic pole directions of the first auxiliary magnetic component and the main magnetic pole structure (32) are opposite. The second auxiliary magnetic component is disposed on the yoke (31) and located on the side of the first auxiliary magnetic component away from the main magnetic pole structure (32). The magnetic pole direction of the second auxiliary magnetic component is perpendicular to the magnetic pole direction of the main magnetic pole structure (32).

7. The loudspeaker according to claim 6, characterized in that, The end of the main magnetic pole structure (32) facing the vibration structure (2) is the N pole, and the end away from the vibration structure (2) is the S pole. The end of the second auxiliary magnetic component facing the main magnetic pole structure (32) is the N pole, and the end away from the main magnetic pole structure (32) is the S pole.

8. The loudspeaker according to claim 1, characterized in that, It also includes an outer cover (6), which is connected to the outer shell (1). The cantilever (51) is connected to the outer shell (1) through the outer cover (6). The yoke (31), the cantilever (51) and the outer cover (6) are integrally formed by hollowing out a plate structure.

9. The loudspeaker according to any one of claims 1-8, characterized in that, The bridging structure (5) further includes a second elastic pad (52), which is sandwiched between the outer shell (1) and the yoke (31).

10. The loudspeaker according to claim 9, characterized in that, The bridging structure (5) further includes a plurality of inner supports (53), which are connected to the outer shell (1) via the second elastic pad (52), and the yoke (31) is sandwiched between the plurality of inner supports (53).

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