loudspeaker

Abstract

This invention belongs to the field of loudspeaker technology and discloses a loudspeaker including a shell, a vibrating structure, a magnetic circuit structure, and a voice coil. The shell includes a main housing, inner supports, and elastic elements. Multiple inner supports are connected to the main housing via the elastic elements, forming an inner cavity extending along a first direction. The vibrating structure is connected to the main housing, and the magnetic circuit structure is located within the inner cavity, sandwiched between the inner supports. The voice coil includes a main voice coil and a secondary voice coil. The main voice coil is connected to the vibrating structure and can move relative to the magnetic circuit structure along the first direction. The secondary voice coil is arranged around the outer periphery of the main voice coil and connected to the main housing. When the main and secondary voice coils are energized, they exert forces on the magnetic circuit structure in opposite directions. In this invention, the secondary voice coil is connected to the main housing, and relative to the main voice coil, the secondary voice coil exerts forces on the magnetic circuit structure in opposite directions when energized, thereby reducing the impact force of the magnetic circuit structure on the main housing.

Description

Technical Field

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

[0002] The inner space of the vibrating structure 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

[0003] 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.

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

[0005] Speakers, including:

[0006] The outer shell includes a main shell, an inner support body, and an elastic element. The inner support body is connected to the main shell through the elastic element. Multiple inner support bodies are provided, and the multiple inner support bodies surround and form an inner support cavity that extends along a first direction.

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

[0008] A magnetic circuit structure is located in the inner support cavity and sandwiched between multiple inner support bodies;

[0009] The voice coil includes a main voice coil and a secondary voice coil. The main voice coil is connected to the vibrating structure and can move relative to the magnetic circuit structure in a first direction. The secondary voice coil is arranged around the outer periphery of the main voice coil and connected to the main housing. When the main voice coil and the secondary voice coil are energized, they exert forces on the magnetic circuit structure in opposite directions.

[0010] Preferably, the elastic element is sandwiched between the main housing and the inner support in a direction perpendicular to the first direction.

[0011] Preferably, the elastic element is laid inside the main housing. Of the inner support and the elastic element, one is provided with a first protrusion and the other is provided with a first groove, with the first protrusion extending into the first groove.

[0012] Preferably, the magnetic circuit structure includes:

[0013] A yoke is sandwiched between multiple inner supports;

[0014] 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;

[0015] A secondary magnetic pole structure is disposed on the yoke and located outside the main voice coil, with the secondary voice coil surrounding the outer periphery of the secondary magnetic pole structure.

[0016] Preferably, the yoke includes a base plate and a plurality of support plates connected to the base plate. The main magnetic pole structure and the secondary magnetic pole structure are both disposed on the base plate and located between the plurality of support plates. The support plates abut against the inner support body.

[0017] Preferably, the support plates at both ends of the base plate in the second direction are first support plates, which are located inside the secondary voice coil, and the second direction is perpendicular to the first direction.

[0018] Preferably, the support plate portions at both ends of the base plate portion in the third direction are the second support plate portions, two auxiliary magnetic pole structures are provided, the main magnetic pole structure is sandwiched between the two auxiliary magnetic pole structures in the third direction, the second support plate portion is located outside the auxiliary voice coil, and the third direction is perpendicular to the first direction and the second direction.

[0019] Preferably, the main magnetic pole structure includes:

[0020] The main magnet, in the form of a ring, is positioned on the side of the yoke facing the vibrating structure.

[0021] The main magnetic pole piece, in the form of a ring, is disposed on the side of the main magnet facing the vibrating structure.

[0022] Preferably, the secondary magnetic pole structure includes:

[0023] A secondary magnet, which is long and strip-shaped, is disposed on the side of the yoke facing the vibrating structure;

[0024] The auxiliary magnetic pole piece, which is elongated, is disposed on the side of the auxiliary magnet facing the vibrating structure.

[0025] Preferably, the auxiliary magnetic pole piece includes a first piece and a second piece connected to each other, wherein the thickness of the first piece in the 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 relative to the second piece.

[0026] The beneficial effects of this invention are:

[0027] By incorporating an elastic element within the housing, the impact of the magnetic circuit structure on the main housing during speaker operation is reduced. The inclusion of an inner support allows the elastic element to be injection-molded between the main housing and the inner support, facilitating sealing during injection molding and preventing overflow. Multiple inner supports, relative to the elastic element, form a through-cavity along a first direction, allowing the magnetic circuit structure to be more easily inserted between them. Furthermore, the primary voice coil drives the vibrating structure to produce sound. The secondary voice coil is connected to the main housing; its force on the magnetic circuit structure is opposite to that of the primary voice coil when energized, further reducing the impact of the magnetic circuit structure on the main housing. Attached Figure Description

[0028] Figure 1 This is a front view of the loudspeaker described in an embodiment of the present invention;

[0029] Figure 2 This is a cross-sectional view of the loudspeaker described in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the loudspeaker structure according to an embodiment of the present invention, omitting the main housing and vibration structure;

[0031] Figure 4 This is a schematic diagram of the speaker structure omitting the housing and vibration structure according to an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the loudspeaker structure according to an embodiment of the present invention, omitting the outer shell, vibration structure, and main voice coil;

[0033] Figure 6 This is a partial schematic diagram of the cooperation between the yoke, main magnetic pole structure and secondary magnetic pole structure described in the embodiments of the present invention;

[0034] Figure 7 This is a schematic diagram of the structure of the yoke described in an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the main housing structure according to an embodiment of the present invention;

[0036] Figure 9 This is a schematic diagram of the structure of the inner support and elastic element in cooperation as described in an embodiment of the present invention;

[0037] Figure 10 This is a schematic diagram of the internal support structure described in an embodiment of the present invention;

[0038] Figure 11 This is a schematic diagram of the structure of the elastic element described in an embodiment of the present invention.

[0039] In the picture:

[0040] 1. Outer shell;

[0041] 11. Main shell; 111. Support plate; 112. Second protrusion;

[0042] 12. Inner support body; 121. First protrusion;

[0043] 13. Elastic element; 131. First groove; 132. Second groove;

[0044] 2. Vibrating structure;

[0045] 3. Magnetic circuit structure;

[0046] 31. Yoke; 311. Base plate; 312. Support plate;

[0047] 32. Main magnetic pole structure; 321. Main magnet; 322. Main magnetic pole piece;

[0048] 33. Secondary magnetic pole structure; 331. Secondary magnet; 332. Secondary magnetic pole piece; 3321. First piece; 3322. Secondary piece;

[0049] 4. Voice coil; 41. Main voice coil; 42. Secondary voice coil. Detailed Implementation

[0050] 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.

[0051] 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.

[0052] 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.

[0053] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0054] like Figures 1-11 As shown, the present invention provides a loudspeaker, including a housing 1, a vibrating structure 2, a magnetic circuit structure 3, and a voice coil 4. The housing 1 includes a main shell 11, inner supports 12, and elastic members 13. The inner supports 12 are connected to the main shell 11 via the elastic members 13. Multiple inner supports 12 are provided, forming an inner support cavity extending along a first direction. The vibrating structure 2 is connected to the main shell 11. The magnetic circuit structure 3 is located within the inner support cavity and sandwiched between the multiple inner supports 12. 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 along the first direction. The secondary voice coil 42 is arranged around the outer periphery of the main voice coil 41 and connected to the main shell 11. When the main voice coil 41 and the secondary voice coil 42 are energized, they exert forces on the magnetic circuit structure 3 in opposite directions.

[0055] In this invention, by providing an elastic element 13 in the outer shell 1, the impact force of the magnetic circuit structure 3 on the main shell 11 of the outer shell 1 is reduced when the speaker is producing sound. By providing an inner support body 12, the elastic element 13 can be injection molded between the main shell 11 and the inner support body 12, and it is easy to seal during injection molding, while preventing injection overflow. Relative to the elastic element 13, multiple inner supports 12 surround to form an inner support cavity that runs through the first direction, thereby making it easier for the magnetic circuit structure 3 to be inserted between multiple inner supports 12. On this basis, the main voice coil 41 of the voice coil 4 can drive the vibration structure 2 to operate and produce sound. The auxiliary voice coil 42 of the voice coil 4 is connected to the main shell 11. Relative to the main voice coil 41, the auxiliary 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 main shell 11 of the outer shell 1.

[0056] Specifically, the elastic element 13 is clamped between the main housing 11 and the inner support 12 in a direction perpendicular to the first direction, and the magnetic circuit structure 3 is inserted into the inner support cavity along the first direction. The elastic element 13 and the inner support 12 cooperate to limit and support the magnetic circuit structure 3 in the circumferential direction, ensuring the alignment of the magnetic circuit structure 3 and the vibration structure 2 in the first direction, and enabling the auxiliary voice coil 42 to more reliably play a vibration damping role in the first direction.

[0057] More specifically, the main housing 11 is provided with a support plate 111, and the inner support body 12 is connected to the support plate 111 via an elastic member 13. The above arrangement allows the elastic member 13 to be more easily clamped between the main housing 11 and the inner support body 12.

[0058] Specifically, the elastic element 13 is laid inside the main housing 11, and the inner support body 12 and the elastic element 13 are connected to each other. One of the inner support body 12 and the elastic element 13 is provided with a first protrusion 121, and the other is provided with a first groove 131. The first protrusion 121 extends into the first groove 131. The first protrusion 121 and the first groove 131 cooperate to increase the reliability of the connection between the inner support body 12 and the elastic element 13, and prevent the inner support body 12 from falling off the elastic element 13 during use.

[0059] More specifically, of the main housing 11 and the elastic member 13, one is provided with a second protrusion 112 and the other is provided with a second groove 132, with the second protrusion 112 extending into the second groove 132. The above arrangement improves the reliability of the connection between the main housing 11 and the elastic member 13.

[0060] In this embodiment, the support plate portion 111 is disposed in the inner cavity of the main housing 11, and each inner support body 12 is correspondingly provided with at least one support plate portion 111. The first protrusion 121 is disposed on the inner support body 12, and the second protrusion 112 is disposed on the support plate portion 111. The elastic element 13 is made of silicone. The first groove 131 and the second groove 132 are both disposed on the elastic element 13. In addition to the above-mentioned arrangement, the elastic element 13 can also be made of other injection-molded and elastic materials such as rubber. Along the direction perpendicular to the first direction, the first protrusion 121 extends into the first groove 131, and the second protrusion 112 extends into the second groove 132.

[0061] Specifically, the vibration structure 2 includes a middle plate and a vibrating plate. The vibrating plate is a ring structure. The outer periphery of the vibrating plate is connected to the main housing 11, and the inner periphery is connected to the middle plate. The main voice coil 41 is connected to the vibrating plate.

[0062] Specifically, the magnetic circuit structure 3 includes a yoke 31, a main magnetic pole structure 32, and a secondary magnetic pole structure 33. The yoke 31 is sandwiched between multiple inner supports 12. The main magnetic pole structure 32 is disposed on the yoke 31, with a main voice coil 41 encircling the outer periphery of the main magnetic pole structure 32. The secondary magnetic pole structure 33 is disposed on the yoke 31, located outside the main voice coil 41, with the secondary voice coil 42 encircling the outer periphery of the secondary magnetic pole structure 33. This arrangement, with the secondary magnetic pole structure 33 separating the two, avoids mutual interference between the main voice coil 41 and the secondary voice coil 42, ensuring the magnetic flux passing through both the main voice coil 41 and the secondary voice coil 42.

[0063] More specifically, multiple secondary magnetic pole structures 33 are provided, and the multiple secondary magnetic pole structures 33 are arranged around the outer periphery of the main magnetic pole structure 32. The above arrangement further ensures the magnetic flux passing through the secondary voice coil 42, making the force on the secondary voice coil 42 more balanced.

[0064] Specifically, the yoke 31 includes a base plate 311 and multiple support plates 312 connected to the base plate 311. The main magnetic pole structure 32 and the auxiliary magnetic pole structure 33 are both disposed on the base plate 311 and located between the multiple support plates 312, with the support plates 312 abutting against the inner support body 12. This arrangement makes the installation between the yoke 31 and the outer casing 1 more reliable.

[0065] 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.

[0066] Specifically, the support plates 312 at both ends of the base plate 311 in the second direction are the first support plates, which are located inside the secondary voice coil 42, thereby facilitating the assembly and positioning of the magnetic circuit system 3.

[0067] More specifically, the support plates 312 at both ends of the base plate 311 in the third direction are the second support plates. There are two auxiliary magnetic pole structures 33. Each second support plate and the main magnetic pole structure 32 are sandwiched between an auxiliary magnetic pole structure 33. The second support plate is located outside the auxiliary voice coil 42, that is, in the third direction. The main voice coil 41 and the auxiliary voice coil 42 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 auxiliary voice coil 42 is stronger.

[0068] In this embodiment, the base plate 311 of the yoke 31 is a rectangular sheet structure. The second direction is the length direction of the base plate 311, and the third direction is the width direction of the base plate 311. The two first support plates, the corresponding support plates 111, and the elastic element 13 are located inside the secondary voice coil 42. The two second support plates, the corresponding support plates 111, and the elastic element 13 are located outside the secondary voice coil 42. The secondary magnetic pole structure 33 is arranged between the second support plates and the main magnetic pole structure 32. It has a larger size, which makes the electromagnetic induction effect of the secondary voice coil 42 stronger.

[0069] Specifically, the magnetic pole direction of the main magnetic pole structure 32 is opposite to that of the secondary magnetic pole structure 33, thereby ensuring the magnetic flux passing through the main voice coil 41 and the secondary voice coil 42.

[0070] More specifically, the main magnetic pole structure 32 includes a main magnet 321 and a main magnetic pole piece 322. The main magnet 321 is ring-shaped and is disposed on the side of the yoke 31 facing the vibration structure 2, and the main magnetic pole piece 322 is ring-shaped and is disposed on the side of the main magnet 321 facing the vibration structure 2.

[0071] More specifically, the secondary magnetic pole structure 33 includes a secondary magnet 331 and a secondary magnetic pole structure 33. The secondary magnet 331 is elongated and disposed on the side of the yoke 31 facing the vibration structure 2, and the secondary magnetic pole piece 332 is elongated and disposed on the side of the secondary magnet 331 facing the vibration structure 2.

[0072] In this embodiment, the secondary magnetic pole piece 332 includes a first piece 3321 and a second piece 3322 connected to each other. The thickness of the first piece 3321 in the first direction is greater than the thickness of the second piece 3322 in the first direction. The first piece 3321 is located away from the main magnetic pole structure 32 relative to the second piece 3322. This arrangement is adapted to the internal spatial structure of the housing 1, ensuring the symmetry and value of BL, thereby specifically increasing the magnetic flux passing through the secondary voice coil 42. In the technical parameters of a loudspeaker, the product of the B value and the L value reflects the dynamic performance of the loudspeaker, where B is the magnetic induction intensity in the magnetic gap (unit: Tesla), and L is the length of the voice coil wire (unit: meter). The larger the BL product value, the greater the force generated.

[0073] When the elastic element 13 is set alone, its vibration reduction 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 works in the resonant frequency range, the secondary voice coil 42 is energized. Thus, on the basis of energy saving, the secondary voice coil 42 can cooperate with the elastic element 13 to play a targeted vibration reduction role.

[0074] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A loudspeaker, characterized in that, include: The outer shell (1) includes a main shell (11), an inner support (12) and an elastic element (13). The inner support (12) is connected to the main shell (11) through the elastic element (13). Multiple inner support (12) are provided, and the multiple inner support (12) surrounds and forms an inner support cavity that extends along a first direction. Vibration structure (2) is connected to the main housing (11); The magnetic circuit structure (3) is located in the inner support cavity and sandwiched between the multiple inner support bodies (12); 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 main housing (11). When the main voice coil (41) and the secondary voice coil (42) are energized, the forces exerted on the magnetic circuit structure (3) are in opposite directions. The elastic element (13) is laid inside the main housing (11). Of the inner support (12) and the elastic element (13), one is provided with a first protrusion (121) and the other is provided with a first groove (131). The first protrusion (121) extends into the first groove (131).

2. The loudspeaker according to claim 1, characterized in that, The elastic element (13) is sandwiched between the main housing (11) and the inner support (12) in a direction perpendicular to the first direction.

3. The loudspeaker according to claim 1, characterized in that, The magnetic circuit structure (3) includes: A yoke (31) is sandwiched between multiple inner supports (12); 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); The secondary magnetic pole structure (33) is disposed on the yoke (31) and located outside the main voice coil (41). The secondary voice coil (42) is arranged around the outer periphery of the secondary magnetic pole structure (33).

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

5. The loudspeaker according to claim 4, characterized in that, The support plate portions (312) at both ends of the base plate portion (311) in the second direction are the first support plate portions, which are located inside the secondary voice coil (42), and the second direction is perpendicular to the first direction.

6. The loudspeaker according to claim 5, characterized in that, The support plate portion (312) at both ends of the base plate portion (311) in the third direction is the second support plate portion. There are two auxiliary magnetic pole structures (33). The main magnetic pole structure (32) is sandwiched between the two auxiliary magnetic pole structures (33) in the third direction. The second support plate portion is located outside the auxiliary voice coil (42). The third direction is perpendicular to the first direction and the second direction.

7. The loudspeaker according to claim 3, characterized in that, The main magnetic pole structure (32) includes: The main magnet (321), in the form of a ring, is disposed on the side of the yoke (31) facing the vibrating 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).

8. The loudspeaker according to claim 3, characterized in that, The secondary magnetic pole structure (33) includes: The auxiliary magnet (331) is long and strip-shaped and is disposed on the side of the yoke (31) facing the vibration structure (2); The auxiliary magnetic pole piece (332) is long and strip-shaped and is disposed on the side of the auxiliary magnet (331) facing the vibration structure (2).

9. The loudspeaker according to claim 8, characterized in that, The secondary magnetic pole piece (332) includes a first piece (3321) and a second piece (3322) connected to each other. The thickness of the first piece (3321) in the first direction is greater than the thickness of the second piece (3322) in the first direction. The first piece (3321) is away from the main magnetic pole structure (32) relative to the second piece (3322).

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