horn

Abstract

The utility model relates to a kind of loudspeaker, including pedestal, diaphragm, coil assembly and magnetic assembly, diaphragm is located on pedestal, and it forms accommodating cavity between diaphragm and pedestal, coil assembly and magnetic assembly are located in accommodating cavity, coil assembly includes support cylinder, first coil and second coil, support cylinder is fixedly connected at the bottom of diaphragm, first coil and second coil are arranged on support cylinder along the axial direction of support cylinder, support cylinder surrounds magnetic assembly and is spaced apart from magnetic assembly and pedestal.The loudspeaker provided in the application can increase the working power of the loudspeaker by setting double coils, improve the vibration efficiency of the diaphragm, and mutual interference is not easy to occur between the two coils distributed along the axial direction during operation.

Description

Technical Field

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

[0002] In traditional loudspeaker design, a single-coil drive system dominates. Its basic principle is to drive a coil within a permanent magnetic field using an audio signal, thereby causing the diaphragm to vibrate and produce sound. However, with the ever-increasing demands of modern audio equipment on loudspeaker output power, conversion efficiency, and distortion control, this classic structure is increasingly revealing its limitations. To increase output sound pressure level, the number of coil turns or the magnet volume is usually increased, but this inevitably increases the mass of the vibrating system, leading to poorer transient response, decreased sensitivity, and deterioration of high-frequency performance. Simultaneously, a single coil is prone to nonlinear distortion and overheating caused by magnetic field inhomogeneity under strong signal drive, hindering further improvements in the overall loudspeaker performance. Utility Model Content

[0003] Therefore, it is necessary to provide a horn with a dual-coil configuration that can increase the horn's operating power, improve the diaphragm's vibration efficiency, and prevent mutual interference between the two coils distributed along the axial direction during operation.

[0004] An embodiment of this utility model provides a loudspeaker, including a base, a diaphragm, a coil assembly, and a magnetic assembly. The diaphragm is disposed on the base, and a receiving cavity is formed between the diaphragm and the base. The coil assembly and the magnetic assembly are disposed in the receiving cavity. The coil assembly includes a support cylinder, a first coil, and a second coil. The support cylinder is fixedly connected to the bottom of the diaphragm. The first coil and the second coil are arranged on the support cylinder along the axial direction of the support cylinder. The support cylinder surrounds the magnetic assembly and is spaced apart from the magnetic assembly and the base.

[0005] The speaker provided in this application has a first coil and a second coil axially arranged on a support cylinder connected to the diaphragm, and they surround and are spaced apart from the internal magnetic components. The synchronous drive of the two coils significantly increases the vibration efficiency of the diaphragm. At the same time, the first coil and the second coil are spaced apart to avoid motion interference, so that the two coils are not prone to mutual interference during operation.

[0006] In one embodiment, one of the first coil and the second coil is wound clockwise on the support cylinder, and the other is wound counterclockwise.

[0007] In one embodiment, the first coil and the second coil are connected in series.

[0008] In one embodiment, the support tube is a paper tube, which can reduce the weight of the support tube and improve vibration efficiency.

[0009] In one embodiment, the magnetic component includes a magnet, a first washer, and a second washer, which are respectively disposed at opposite ends of the magnet along the axial direction. Each washer corresponds to a coil, which improves the flexibility of coil operation and diaphragm control; it also provides stronger magnetic fields to the first and second coils respectively, improving vibration efficiency during operation.

[0010] In one embodiment, the first coil is arranged radially opposite to the first washer, and the second coil is arranged radially opposite to the second washer.

[0011] In one embodiment, a non-magnetic pad is further included, which is disposed at the end of the base away from the diaphragm. This prevents the magnetic field of the magnetic component from passing through the top of the base and entering from the bottom, instead confining the magnetic field of the magnetic component more within the base.

[0012] In one embodiment, the first washer, the magnet, the second washer, and the non-magnetic pad are connected sequentially along the axial direction.

[0013] In one embodiment, the support cylinder has multiple axially extending perforations, which are arranged at intervals along the circumference of the support cylinder. This reduces the weight of the support cylinder, improves vibration efficiency, and does not significantly affect the stability of the coil wound on it.

[0014] In one embodiment, the first coil and the second coil are disposed on the surface of the support cylinder opposite to the magnetic component, which can prevent the coil from touching the magnetic component when vibrating. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the structure of a loudspeaker provided in one embodiment of this application; Figure 2 This is a schematic diagram of the structure of a loudspeaker provided in one embodiment of this application; Figure 3 This is a schematic diagram of the structure of a loudspeaker provided in one embodiment of this application; Figure 4 This is a schematic diagram of the structure of a loudspeaker provided in one embodiment of this application; Figure 5 A cross-sectional view of a loudspeaker provided in an embodiment of this application; Figure 6 An exploded view of a loudspeaker provided in an embodiment of this application; Figure 7 This is a partial structural diagram of a speaker provided in one embodiment of this application.

[0016] Reference numerals: horn 10; base 101; diaphragm 102; accommodating cavity 103; coil assembly 200; support cylinder 201; first coil 202; second coil 203; magnetic assembly 300; magnet 301; first washer 302; second washer 303; non-magnetic pad 401. Detailed Implementation

[0017] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0018] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", 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 are not intended to 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.

[0019] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0021] In traditional electrodynamic loudspeaker design, a single-coil drive system has long dominated. Its basic principle is to drive a coil in a permanent magnetic field using an audio signal, thereby causing the diaphragm to vibrate and produce sound. However, with the increasing demands of modern audio equipment on loudspeaker output power, conversion efficiency, and distortion control, this classic structure has become increasingly limited. To increase output sound pressure level, the number of coil turns or the magnet volume is usually increased, but this inevitably increases the mass of the vibration system, leading to poorer transient response, decreased sensitivity, and deterioration of high-frequency performance. Simultaneously, a single coil is prone to nonlinear distortion and overheating caused by magnetic field inhomogeneity under strong signal drive, hindering further improvements in the overall loudspeaker performance. Furthermore, traditional magnetic circuit designs offer relatively limited control over the coil, making it difficult to regulate diaphragm movement. Therefore, there is an urgent need for a solution that improves diaphragm vibration efficiency and minimizes interference between the two axially distributed coils during operation.

[0022] Reference Figures 1-7 This utility model provides a speaker 10, including a base 101, a diaphragm 102, a coil assembly 200, and a magnetic assembly 300. The diaphragm 102 is disposed on the base 101, and a receiving cavity 103 is formed between the diaphragm 102 and the base 101. The coil assembly 200 and the magnetic assembly 300 are disposed in the receiving cavity 103. The coil assembly 200 includes a support cylinder 201, a first coil 202, and a second coil 203. The support cylinder 201 is fixedly connected to the bottom of the diaphragm 102. The first coil 202 and the second coil 203 are arranged along the axial direction of the support cylinder 201. The support cylinder 201 surrounds the magnetic assembly 300 and is spaced apart from the magnetic assembly 300 and the base 101. The speaker 10 provided by this application, with its dual-coil configuration, can increase the working power of the speaker 10, improve the vibration efficiency of the diaphragm 102, and the two axially distributed coils are less likely to interfere with each other during operation.

[0023] Specifically, to address the aforementioned issues, in this embodiment, the speaker 10 includes a base 101, a diaphragm 102, a coil assembly 200, and a magnetic assembly 300. The diaphragm 102 is mounted above the base 101, together forming a sealed cavity 103. The cavity 103 provides a stable and sealed working environment for the coil assembly 200 and the magnetic assembly 300. The coil assembly 200 and the magnetic assembly 300 are the driving source of the speaker 10, and are assembled inside the cavity 103. The coil assembly 200 includes a support cylinder 201, a first coil 202, and a second coil 203. The top end of the support cylinder 201 is directly fixedly connected to the bottom end of the diaphragm 102, ensuring efficient electromagnetic force transmission directly to the diaphragm 102 body. The first coil 202 and the second coil 203 are arranged at intervals along the axial direction of the support cylinder 201, and the spacing between them can be set according to actual application requirements. The coils are arranged at a certain interval. This dual-coil axial arrangement allows both coils to operate simultaneously in the magnetic field, meaning the first coil 202 and the second coil 203 jointly apply the driving force, significantly increasing the power handling capacity of the speaker 10 and thus greatly improving the vibration efficiency of the diaphragm 102. Simultaneously, because the first coil 202 and the second coil 203 are spatially distributed along the axial direction, mutual interference between their magnetic fields during operation is effectively avoided, reducing distortion and improving the motion stability of the diaphragm 102. In some embodiments, the support cylinder 201 surrounds the entire exterior of the magnetic assembly 300 and maintains a certain gap with both the magnetic assembly 300 and the base 101, without contacting each other. This non-contact design ensures that the coil assembly 200 can move freely and smoothly along the axial direction when energized, without any mechanical friction or interference.

[0024] Furthermore, in this embodiment, the first coil 202 and the second coil 203 are wound in a spiral manner. Specifically, one coil is spirally wound clockwise along the surface of the support cylinder 201, while the other coil is spirally wound strictly counterclockwise. For example, in one embodiment, the first coil 202 is spirally wound clockwise on the support cylinder 201, and the second coil 203 is spirally wound counterclockwise. In another embodiment, the second coil 203 is spirally wound clockwise on the support cylinder 201, and the first coil 202 is spirally wound counterclockwise. When the audio current passes through the first coil 202 and the second coil 203, because the two coils are wound in opposite directions, the electromagnetic forces generated by their movement in the same magnetic field can work together to enhance the driving effect on the support cylinder 201 and the diaphragm 102. This not only effectively improves the vibration efficiency of the speaker unit 10, but also significantly improves the balance of the diaphragm 102's movement under high-power operating conditions, reducing distortion caused by magnetic field asymmetry or vibration imbalance, thereby making the sound reproduction clearer and more accurate. At the same time, this winding design also helps to offset some of the back electromotive force generated by the coil assembly 200 during operation, further improving the overall working stability of the speaker 10.

[0025] It should be noted that the first coil 202 and the second coil 203 can be connected in series. Specifically, the end of the first coil 202 and the beginning of the second coil 203 are connected sequentially by wires to form a continuous electrical circuit. When an audio signal is input, current flows sequentially through the first coil 202 and the second coil 203. Series connection ensures that the current flowing through the first coil 202 and the second coil 203 remains equal in magnitude and direction at all times. Since the two coils are symmetrically arranged in the magnetic field and rotate in opposite directions, the equal current will generate electromagnetic driving forces that are in the same direction and superimposed, thus synchronously and in the same direction driving the diaphragm 102 to move. This significantly enhances the driving force of the speaker 10 and effectively avoids problems such as uneven current distribution, phase difference, or magnetic cancellation that may occur due to parallel connection or other connection methods.

[0026] In one embodiment, the support tube 201 is a paper tube. The paper material of the tube is lightweight, significantly reducing the overall mass of the speaker 10. The lighter mass and lower inertia allow the diaphragm 102 to start and stop more quickly under driving force, thereby greatly improving the vibration efficiency and transient response of the speaker 10 to audio signals. Secondly, the paper material has good damping characteristics, effectively absorbing unwanted residual vibrations, helping to reduce sound coloration and making sound reproduction clearer and purer. Furthermore, the paper support tube 201 also possesses moderate rigidity and strength, effectively supporting the coil while ensuring that it does not deform or produce abnormal noise due to severe vibration.

[0027] Furthermore, in some embodiments, the magnetic component 300 includes a magnet 301, a first washer 302, and a second washer 303. The first washer 302 and the second washer 303 are respectively disposed at opposite ends of the magnet 301 along the axial direction. Specifically, the first washer 302 and the second washer 303 correspond to the first coil 202 and the second coil 203, respectively. This symmetrical arrangement can significantly enhance the accuracy of the action on the first coil 202 and the second coil 203, making the control of the vibration state of the diaphragm 102 more efficient. At the same time, the dual washer arrangement of the first washer 302 and the second washer 303 can effectively converge the magnetic lines of force, forming stronger and more concentrated magnetic fields at the locations of the first coil 202 and the second coil 203, respectively. Each washer corresponds to one coil, which can improve the flexibility of the action on the coil and the flexibility of the control of the diaphragm 102; and can provide stronger magnetic fields for the first coil 202 and the second coil 203, respectively, improving the vibration efficiency during operation.

[0028] In some embodiments, the first coil 202 is radially opposite to the first washer 302, and the second coil 203 is radially opposite to the second washer 303. It should be noted that, viewed from a radial perspective, the first coil 202 is located exactly outside the first washer 302, and the second coil 203 is also aligned with the outside of the second washer 303 in the same manner. This ensures that the first coil 202 is completely within the strong magnetic field region formed by the first washer 302, and the second coil 203 is also completely within the strong magnetic field formed by the second washer 303. When current flows through the coils, this radial alignment allows each turn of the coil's effective conductor to fully cut through the dense magnetic field lines, thereby converting electrical energy into mechanical force. This significantly improves the utilization rate of the magnetic field and reduces distortion that may be caused by magnetic field inhomogeneity.

[0029] Furthermore, in this embodiment, the speaker 10 also includes a non-magnetic pad 401, located at the other end of the base 101 away from the diaphragm 102, i.e., at the bottom of the speaker 10. The non-magnetic pad 401 is made of a non-magnetic material and optimizes the magnetic circuit, preventing magnetic field leakage and improving energy utilization efficiency. Specifically, the non-magnetic pad 401 effectively blocks the path of the magnetic field of the magnetic component 300, which diverges from the top of the base 101 and then returns from its bottom to form a closed loop. Magnetic short circuits significantly weaken the effective working magnetic field strength and lead to energy loss. By installing the non-magnetic pad 401, most of the magnetic lines of force generated by the magnetic component 300 are effectively constrained and guided inside the base 101, and concentrated in the working air gaps corresponding to the first washer 302 and the second washer 303. This prevents the magnetic field of the magnetic component 300 from passing out from the top of the base 101 and then entering from the bottom, and instead makes the magnetic field of the magnetic component 300 more confined within the base 101.

[0030] In some embodiments, the first washer 302, magnet 301, second washer 303, and non-magnetic pad 401 are connected sequentially along the axial direction. It should be noted that this stacked arrangement constitutes a complete magnetic circuit system, ensuring magnetic circuit performance. Specifically, the first washer 302, as the upper magnetic pole plate, is first connected to one end of the magnet 301, responsible for converging and guiding the magnetic field upwards towards the first coil 202. The magnet 301 is the source of magnetic energy for the speaker 10. The lower surface of the magnet 301 is tightly bonded to the second washer 303, which, as the lower magnetic pole plate, guides and converges the magnetic field to the area of ​​the second coil 203 below. Finally, the non-magnetic pad 401 is installed at the very bottom of the speaker 10. The non-magnetic pad 401 is connected to the second washer 303, preventing the magnetic lines of force from extending downwards and forming a leakage magnetic path, thereby effectively confining the magnetic field within the working air gap formed by the first washer 302 and the second washer 303. The sequential axial connection structure ensures a clear magnetic field direction and a concentrated path, which can improve the utilization efficiency of magnetic energy and provide a stable driving magnetic field for the first coil 202 and the second coil 203.

[0031] Furthermore, in this embodiment, the support cylinder 201 has multiple axially extending perforations. It should be noted that the perforations can be configured as multiple elongated perforated holes extending along their axial direction. These perforations are evenly and spaced apart in the circumferential direction of the support cylinder 201, forming a regular and symmetrical layout. The multiple perforations are spaced apart circumferentially along the support cylinder 201. The axially distributed perforations remove some redundant material, effectively reducing the weight of the support cylinder 201 itself. The lighter support cylinder 201 reduces the overall mass of the horn 10, allowing the diaphragm 102 to start and stop more quickly under electromagnetic force, significantly improving the vibration efficiency and high-frequency transient response of the horn 10. Simultaneously, the axial extension of the perforations and the sufficient circumferential spacing ensure that the support cylinder 201 retains the necessary structural strength and overall rigidity. Therefore, while effectively reducing weight, it does not significantly affect the fixation of the coil tightly wound on its surface. The first coil 202 and the second coil 203 can still be stably supported and accurately maintained in their working positions in the magnetic field.

[0032] To prevent the coil from contacting the magnetic component 300 during vibration, in some embodiments, the first coil 202 and the second coil 203 are disposed on the surface of the support cylinder 201 opposite to the magnetic component 300, i.e., the first coil 202 and the second coil 203 are arranged on the outer surface of the support cylinder 201. In other words, the coil is located on the outer wall of the support cylinder 201, separated from the internal magnet 301, washer, and other components by a distance equal to the cylinder wall. This arrangement ensures the reliability and durability of the speaker 10 during operation. Specifically, when an audio signal is input, the coil is energized, and it drives the diaphragm 102 to reciprocate, the vibration amplitude may be large. Distributing the coil on the outside of the support cylinder 201 is equivalent to creating a physical buffer zone between the moving coil and the stationary magnetic component 300. This effectively increases the safety gap between the two, thereby preventing the coil from contacting the internal magnetic component 300 during severe vibration or large-stroke operation, thus preventing the coil from hitting the magnetic component 300 during vibration.

[0033] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A loudspeaker, characterized in that, The device includes a base, a diaphragm, a coil assembly, and a magnetic assembly. The diaphragm is disposed on the base, and a cavity is formed between the diaphragm and the base. The coil assembly and the magnetic assembly are disposed in the cavity. The coil assembly includes a support cylinder, a first coil, and a second coil. The support cylinder is fixedly connected to the bottom of the diaphragm. The first coil and the second coil are arranged on the support cylinder along the axial direction of the support cylinder. The support cylinder surrounds the magnetic assembly and is spaced apart from the magnetic assembly and the base.

2. The loudspeaker according to claim 1, characterized in that, The first coil and the second coil are spirally wound clockwise on the support cylinder, and the other is spirally wound counterclockwise.

3. The loudspeaker according to claim 2, characterized in that, The first coil and the second coil are connected in series.

4. The loudspeaker according to claim 1, characterized in that, The support tube is a paper tube.

5. The loudspeaker according to claim 1, characterized in that, The magnetic component includes a magnet, a first washer, and a second washer, which are respectively located at opposite ends of the magnet along the axial direction.

6. The loudspeaker according to claim 5, characterized in that, The first coil is arranged radially opposite to the first washer, and the second coil is arranged radially opposite to the second washer.

7. The loudspeaker according to claim 6, characterized in that, It also includes a non-magnetic pad, which is disposed at the end of the base away from the diaphragm.

8. The loudspeaker according to claim 7, characterized in that, The first washer, the magnet, the second washer, and the non-magnetic pad are connected sequentially along the axial direction.

9. The loudspeaker according to claim 1, characterized in that, The support cylinder has multiple axially extending perforations, which are arranged at intervals along the circumference of the support cylinder.

10. The loudspeaker according to claim 1, characterized in that, The first coil and the second coil are disposed on the surface of the support cylinder opposite to the magnetic component.

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