Loudspeaker

Abstract

The utility model discloses a loudspeaker which comprises a vibration system and a magnetic circuit system. The vibration system comprises a vibrating diaphragm, a first voice coil and a second voice coil, the vibrating diaphragm comprises a low-frequency part and a high-frequency part connected with the low-frequency part, the first voice coil is fixed on the high-frequency part, and the second voice coil is fixed on the low-frequency part; the vibration system comprises at least one first magnet, at least one second magnet and at least one third magnet; the at least one first magnet and the at least one second magnet form a first magnetic circuit, and the first magnetic circuit corresponds to the first voice coil; the at least one second magnet and the at least one third magnet form a second magnetic circuit, and the second magnetic circuit corresponds to the second voice coil; the at least one second magnet is fixed on the second voice coil or the low-frequency part. According to the loudspeaker, the position of the second magnet can be changed along with the change of the low-frequency part, and the position of the first magnetic circuit can be correspondingly changed, so that the relative position of the first voice coil and the first magnetic circuit is stable, and a better high-pitch effect can be brought.

Description

Technical Field

[0001] This utility model relates to the field of acoustic equipment technology, and in particular to a loudspeaker. Background Technology

[0002] Loudspeakers in related technologies typically include a vibration system and a magnetic circuit system connected to the vibration system. The vibration system includes a diaphragm and a voice coil fixed to the diaphragm, and the magnetic circuit system provides a magnetic circuit for the voice coil to drive the diaphragm to vibrate.

[0003] In some loudspeakers that emit both low-frequency and high-frequency sounds, the diaphragm includes a low-frequency portion located at the periphery and a high-frequency portion connected to the low-frequency portion and located in the center. The voice coil of this loudspeaker includes a first voice coil fixed to the high-frequency portion and a second voice coil fixed to the low-frequency portion. Its magnetic circuit system includes a housing and a first magnet, a second magnet, and a third magnet fixed within the housing. The first and second magnets form a first magnetic circuit corresponding to the first voice coil; the second and third magnets form a second magnetic circuit corresponding to the second voice coil. When the low-frequency portion of the diaphragm vibrates, it causes the high-frequency portion to vibrate as well, resulting in a significant increase in the distance between the first voice coil and the first magnetic circuit. This significantly reduces the efficiency of the first voice coil, thus lowering the treble performance. Utility Model Content

[0004] The technical problem to be solved by this invention is to provide an improved loudspeaker.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a loudspeaker, including a vibration system and a magnetic circuit system;

[0006] The vibration system includes a diaphragm, a first voice coil, and a second voice coil. The diaphragm includes a low-frequency portion and a high-frequency portion connected to the low-frequency portion. The first voice coil is fixed to the high-frequency portion, and the second voice coil is fixed to the low-frequency portion.

[0007] The vibration system includes at least one first magnet, at least one second magnet, and at least one third magnet; at least one first magnet and at least one second magnet form a first magnetic circuit, the first magnetic circuit corresponding to the first voice coil; at least one second magnet and at least one third magnet form a second magnetic circuit, the second magnetic circuit corresponding to the second voice coil;

[0008] At least one of the second magnets is fixed to the second voice coil or the low-frequency portion.

[0009] In some embodiments, the low-frequency portion is planar ring-shaped; the high-frequency portion is planar and disposed in the middle of the low-frequency portion.

[0010] In some embodiments, the diaphragm further includes a first folded ring with an arc-shaped cross-section, the first folded ring connecting the outer periphery of the high-frequency portion to the inner periphery of the low-frequency portion.

[0011] In some embodiments, the diaphragm further includes an annular edge portion and a second folded ring with an arc-shaped cross-section, the second folded ring connecting the outer periphery of the low-frequency portion to the inner periphery of the annular edge portion.

[0012] In some embodiments, the second magnet is in the form of a planar ring and is fixed to the second voice coil at its outer periphery.

[0013] In some embodiments, the second magnet is disposed on the inner side of the second voice coil near the first voice coil.

[0014] In some embodiments, the first magnet and the third magnet are arranged at intervals, the second magnet is located between the first magnet and the third magnet, and a gap is left between the second magnet and the first magnet.

[0015] In some embodiments, the second voice coil extends into the gap between the first magnet and the third magnet.

[0016] In some embodiments, the first voice coil is a planar voice coil, and the second voice coil is a vertical voice coil.

[0017] In some embodiments, the loudspeaker further includes a housing and a PCB board having at least one air hole, the PCB board being disposed inside the housing and electrically connected to the first voice coil and the second voice coil respectively; the open end of the housing is fixedly connected to the edge portion of the diaphragm, and the first magnet and the third magnet are respectively fixedly installed inside the housing.

[0018] By implementing this utility model, the following beneficial effects can be achieved:

[0019] The speaker of this invention, since at least one second magnet is fixed on the second voice coil or the low-frequency part, the position of the second magnet can change with the change of the low-frequency part, and the position of the first magnetic circuit also changes accordingly, thereby ensuring the relative position of the first voice coil and the first magnetic circuit is stable, which can bring better high-frequency effect. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0021] Figure 1 This is a three-dimensional structural schematic diagram of a loudspeaker according to an embodiment of the present invention;

[0022] Figure 2 yes Figure 1A front view of the speaker in the image;

[0023] Figure 3 yes Figure 1 One of the schematic diagrams of a loudspeaker exploding;

[0024] Figure 4 yes Figure 1 The second illustration of the explosion of the loudspeaker in the image;

[0025] Figure 5 yes Figure 2 A cross-sectional view of the speaker at position AA. Detailed Implementation

[0026] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a chemical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] See Figures 1 to 5One embodiment of this utility model discloses a loudspeaker that can be used in electronic products such as mobile phones, tablets, and headphones. The loudspeaker includes a vibration system and a magnetic circuit system connected to the vibration system. The vibration system generates vibrations based on electrical signals, thereby producing sound. The magnetic circuit system generates a corresponding magnetic circuit to drive the vibration system to vibrate.

[0031] For example Figure 3 and Figure 4 As shown, in some embodiments, the vibration system may include a diaphragm 1, a first voice coil 2, and a second voice coil 3. The diaphragm 1 may be rectangular in shape and may include a rectangular annular low-frequency portion 11 and a rectangular sheet-like high-frequency portion 12 connected to the low-frequency portion 11, so as to be able to have both low-frequency and high-frequency performance.

[0032] Combination Figure 5 It is understood that, in some embodiments, the first voice coil 2 may be planar and disposed on the high-frequency section 12. The second voice coil 3 is vertical and disposed on the low-frequency section 11; specifically, the second voice coil 3 is rectangular. The first voice coil 2 and the second voice coil 3 are used to generate vibration after being energized, thereby driving the high-frequency section 12 and the low-frequency section 11 to vibrate and produce sound.

[0033] For example Figure 3 and Figure 4 As shown, in some embodiments, the low-frequency portion 11 is planar and ring-shaped, and the inner and outer edges of the low-frequency portion 11 can be square, circular, elliptical, etc. The high-frequency portion 12 is planar and is disposed in the middle of the low-frequency portion 11. The shape of the high-frequency portion 12 can be square, circular, elliptical, etc. The shape of the inner edge of the low-frequency portion 11 matches the shape of the high-frequency portion 12. The specific selection is based on actual needs. Understandably, in some other embodiments, an enhancement layer can also be provided, covering the top of the high-frequency portion 12, to enhance the rigidity of the high-frequency portion 12, effectively resist the deformation of the high-frequency portion 12, thereby more accurately reproducing the sound signal and reducing distortion.

[0034] like Figures 3 to 5 As shown, in some embodiments, the first voice coil 2 is a planar voice coil, in the form of a planar ring. For example, it can be a circular ring, a square ring, or an elliptical ring. The second voice coil 3 is a vertical voice coil, in the form of a cylindrical tube. For example, it can be a circular tube, a square tube, or an elliptical tube. The specific choice depends on the actual needs.

[0035] like Figures 1 to 5As shown, in some embodiments, the diaphragm 1 further includes a first loop 14 with an arc-shaped cross-section, which connects the outer periphery of the high-frequency portion 12 to the inner periphery of the low-frequency portion 11. The first loop 14 supports and maintains the vibration of the high-frequency portion 12, ensuring that the high-frequency portion 12 can move axially while avoiding lateral movement. The first loop 14 also ensures that the first voice coil 2 can move axially within the magnetic gap.

[0036] For example Figure 5 As shown, in some embodiments, the diaphragm 1 further includes an annular edge portion 13 and a second loop 15 with an arc-shaped cross-section, the second loop 15 connecting the outer periphery of the low-frequency portion 11 to the inner periphery of the edge portion 13. The second loop 15 is used to support and retain the vibration of the low-frequency portion 11, ensuring that the low-frequency portion 11 can move axially and avoid lateral movement. The second loop 15 also ensures that the second voice coil 3 can move axially within the magnetic gap.

[0037] like Figures 3 to 5 As shown, the vibration system includes at least one first magnet 4, at least one second magnet 5, and at least one third magnet 6. The at least one first magnet 4 and at least one second magnet 5 form a first magnetic circuit, corresponding to a first voice coil 2. The at least one second magnet 5 and at least one third magnet 6 form a second magnetic circuit, corresponding to a second voice coil 3. The number of first magnets 4, second magnets 5, and third magnets 6 can be one, two, or multiple, depending on actual needs. For example, this embodiment shows one first magnet 4, one second magnet 5, and four third magnets 6. The first magnet 4 and second magnets 5 form the first magnetic circuit, and the second magnets 5 and the four third magnets 6 form the second magnetic circuit.

[0038] At least one second magnet 5 is fixed to the second voice coil 3 or the low-frequency portion 11. For example, it can be glued, snapped, or inserted into the side or bottom of the second voice coil 3, or glued, snapped, or inserted into the low-frequency portion 11. Alternatively, when multiple second magnets 5 are present, they can be partially fixed to the second voice coil 3 and partially fixed to the low-frequency portion 11, as long as the second magnets 5 and the low-frequency portion 11 vibrate synchronously. Understandably, gaps are left between the first magnet 4 and the third magnet 6 and the diaphragm 1, or they abut against the edge portion 13 through the isolator 71, to prevent the vibration of the diaphragm 1 from affecting the fixation of the first magnet 4 and the third magnet 6 after long-term use. Alternatively, the first magnet 4 and the third magnet 6 can be pressed and installed between the first magnet 4 and the housing 7 through the isolator 71.

[0039] The first magnetic circuit drives the first voice coil 2 to vibrate, thereby driving the high-frequency section 12 to vibrate. The second magnetic circuit drives the second voice coil 3 to vibrate, which in turn drives the low-frequency section 11 to vibrate. Since the high-frequency section 12 is located in the middle of the low-frequency section 11, it vibrates simultaneously with the low-frequency section 11, meaning that the vibration of the low-frequency section 11 ultimately drives the diaphragm 1 to vibrate as a whole. The second magnet 5 vibrates synchronously with the low-frequency section 11. The relative positional change between the second magnet 5 and the first voice coil 2 is small, which allows the first voice coil 2 to be stably placed in the first magnetic circuit, resulting in better high frequencies. Even under large amplitude low-frequency conditions, the efficiency of the first voice coil 2 will not decrease due to its distance from the magnetic circuit.

[0040] like Figures 3 to 5 As shown, in some embodiments, at least one second magnet 5 is disposed on the inner side of the second voice coil 3 near the first voice coil 2. The first voice coil 2 is a planar voice coil, and the lateral length of the second magnet 5 is greater than or equal to the distance between the first voice coil 2 and the second voice coil 3. The first voice coil 2 corresponds to at least a portion of the second magnet 5 and at least a portion of the first magnet 4, such that the first voice coil 2 is completely placed in the first magnetic circuit. A gap is left between the first magnet 4 and the second magnet 5 to prevent the second magnet 5 from vibrating.

[0041] like Figures 3 to 5 As shown, in some embodiments, the second magnet 5 is in the form of a planar ring and is fixed to the second voice coil 3 by its outer periphery. For example, the second magnet 5 is a circular ring, a square ring, an elliptical ring, etc.

[0042] like Figures 3 to 5 As shown, in some embodiments, the first magnet 4 and the third magnet 6 are arranged at intervals, and the second magnet 5 is located between the first magnet 4 and the third magnet 6, with a gap between the second magnet 5 and the first magnet 4. The second voice coil 3 extends into the gap between the first magnet 4 and the third magnet 6. For example, the second voice coil 3 is a vertical voice coil that partially extends into the gap between the first magnet 4 and the third magnet 6.

[0043] like Figure 1 and Figure 3 As shown, in some embodiments, the loudspeaker further includes a housing 7 with at least one vent 8 and a PCB board 9. The PCB board 9 is disposed inside the housing 7 and electrically connected to the first voice coil 2 and the second voice coil 3, respectively. The open end of the housing 7 is fixedly connected to the edge portion 13 of the diaphragm 1, and the first magnet 4 and the third magnet 6 are fixedly installed inside the housing 7. For example, the housing 7 includes a side wall and a bottom plate, the first magnet 4 is snapped onto the housing 7, and the third magnet 6 is snapped onto the side wall.

[0044] The vent 8 is used to balance pressure and maintain stable pressure inside and outside the speaker. The PCB board 9 is used to provide power. The housing 7 is used to provide a mounting base and protect the vibration system from exposure. Understandably, when the first magnet 4 and the third magnet 6 are installed, gaps are left between the first magnet 4 and the third magnet 6 and the diaphragm 1, or they abut against the edge portion 13 through insulating parts, which can prevent the vibration of the diaphragm 1 from affecting the fixation of the first magnet 4 and the third magnet 6 after long-term use.

[0045] By implementing this utility model, the following beneficial effects can be achieved:

[0046] The loudspeaker of this invention has at least one second magnet fixed to the second voice coil or the low-frequency section. The position of the second magnet can change with the change of the low-frequency section, and the position of the first magnetic circuit also changes accordingly, thereby ensuring the relative position of the first voice coil and the first magnetic circuit is stable, which can bring better high-frequency effect.

[0047] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, without departing from the concept of the present utility model, the above embodiments or technical features can be freely combined, and several modifications and improvements can be made. These all fall within the protection scope of the present utility model, that is, the embodiments described "in some embodiments" can be freely combined with any of the embodiments above and below. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A loudspeaker, comprising a vibration system and a magnetic circuit system; The vibration system includes a diaphragm (1), a first voice coil (2) and a second voice coil (3). The diaphragm (1) includes a low-frequency part (11) and a high-frequency part (12) connected to the low-frequency part (11). The first voice coil (2) is fixed on the high-frequency part (12) and the second voice coil (3) is fixed on the low-frequency part (11). The vibration system includes at least one first magnet (4), at least one second magnet (5), and at least one third magnet (6); at least one first magnet (4) and at least one second magnet (5) form a first magnetic circuit, which corresponds to the first voice coil (2); at least one second magnet (5) and at least one third magnet (6) form a second magnetic circuit, which corresponds to the second voice coil (3); Its features are, At least one of the second magnets (5) is fixed to the second voice coil (3) or the low-frequency portion (11).

2. The loudspeaker according to claim 1, characterized in that, The low-frequency portion (11) is in the shape of a planar ring; the high-frequency portion (12) is in the shape of a planar ring and is located in the middle of the low-frequency portion (11).

3. The loudspeaker according to claim 2, characterized in that, The diaphragm (1) further includes a first folded ring (14) with an arc-shaped cross-section, the first folded ring (14) connecting the outer periphery of the high-frequency part (12) to the inner periphery of the low-frequency part (11).

4. The loudspeaker according to claim 3, characterized in that, The diaphragm (1) further includes an annular edge portion (13) and a second folded ring (15) with an arc-shaped cross-section, the second folded ring (15) connecting the outer periphery of the low-frequency portion (11) to the inner periphery of the annular edge portion (13).

5. The loudspeaker according to claim 1, characterized in that, The second magnet (5) is in the shape of a planar ring and is fixed to the second voice coil (3) on its outer periphery.

6. The loudspeaker according to claim 5, characterized in that, The second magnet (5) is located on the inner side of the second voice coil (3) near the first voice coil (2).

7. The loudspeaker according to claim 1, characterized in that, The first magnet (4) and the third magnet (6) are arranged at intervals, and the second magnet (5) is located between the first magnet (4) and the third magnet (6), with a gap between the second magnet (5) and the first magnet (4).

8. The loudspeaker according to claim 7, characterized in that, The second voice coil (3) extends into the gap between the first magnet (4) and the third magnet (6).

9. The loudspeaker according to any one of claims 1 to 8, characterized in that, The first voice coil (2) is a planar voice coil, and the second voice coil (3) is a vertical voice coil.

10. The loudspeaker according to any one of claims 1 to 8, characterized in that, The loudspeaker also includes a housing (7) with at least one air hole (8) and a PCB board (9). The PCB board (9) is located inside the housing (7) and is electrically connected to the first voice coil (2) and the second voice coil (3) respectively. The open end of the housing (7) is fixedly connected to the edge portion (13) of the diaphragm (1). The first magnet (4) and the third magnet (6) are fixedly installed inside the housing (7).

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