Loudspeaker

Abstract

The invention belongs to the field of acoustics, and relates to a loudspeaker which comprises a shell, a magnetic circuit assembly, a vibrating diaphragm and a voice coil. Wherein an inner cavity is defined by the shell and the magnetic circuit assembly, the shell is provided with a sound outlet channel and a sound outlet communicated with the sound outlet channel and the inner cavity, and the vibrating diaphragm and the voice coil are both located in the inner cavity; the vibrating diaphragm comprises a diaphragm and a folding ring; the outer periphery of the diaphragm is connected with the inner periphery of the folding ring, the diaphragm protrudes in the direction from the inner cavity to the sound outlet and is arranged in an arc shape, and the diaphragm faces the sound outlet; the folding ring is arranged in a plane shape, and part of the folding ring is clamped between the shell and the magnetic circuit assembly; the voice coil is connected to one side, back to the sound outlet, of the folding ring and extends along the circumferential direction of the folding ring. Through the arrangement, the problems that sound waves in the front cavity generate interference and the sound field is disordered due to the fact that the folding ring reflects the sound waves in the front cavity can be effectively solved.

Description

Technical Field

[0001] The present application relates to the field of acoustic technology, and more particularly, to a loudspeaker. Background Art

[0002] A loudspeaker, also known as a "horn," is an electroacoustic transducer. Its primary function is to convert electrical signals into acoustic signals, thereby radiating sound into the air. Speakers are commonly found in electronic devices such as stereos, televisions, and telephones.

[0003] Currently, see Figure 1 The diaphragm 10 of the loudspeaker includes a diaphragm 11 and a folding ring 12. Due to the disordered structure and shape of the folding ring 12 itself, the folding ring 12 easily reflects the sound waves in the front cavity, causing interference of the sound waves in the front cavity, thereby causing a chaotic sound field, so it is urgently needed to be improved. Summary of the Invention

[0004] Based on this, it is necessary to provide a loudspeaker to address the above problems, aiming to effectively avoid the interference of sound waves in the front cavity and the confusion of the sound field caused by the reflection of the sound waves in the front cavity by the folding ring.

[0005] The embodiments of the present application achieve the above-mentioned objectives through the following technical solutions.

[0006] The present application provides a loudspeaker, comprising: a housing, a magnetic circuit assembly, a diaphragm, and a voice coil; wherein:

[0007] The housing and the magnetic circuit assembly are arranged to form an inner cavity, the housing is provided with a sound outlet channel and a sound outlet communicating with the sound outlet channel and the inner cavity, and the diaphragm and the voice coil are both located in the inner cavity;

[0008] The diaphragm includes a diaphragm and a folding ring; the outer periphery of the diaphragm is connected to the inner periphery of the folding ring, the diaphragm protrudes in the direction from the inner cavity to the sound outlet and is arranged in an arc shape, and the diaphragm faces the sound outlet; the folding ring is arranged in a planar shape, and the folding ring is clamped between the shell and the magnetic circuit assembly; the voice coil is connected to the side of the folding ring facing away from the sound outlet and extends along the circumference of the folding ring.

[0009] In one embodiment, the cavity wall of the inner cavity adjacent to the sound outlet protrudes in the direction from the inner cavity to the sound outlet and is arranged in an arc shape, so that the distance between any position of the cavity wall of the inner cavity adjacent to the sound outlet and the corresponding position of the diaphragm is the same.

[0010] In one embodiment, the folding ring and the diaphragm are integrally formed.

[0011] In one embodiment, the inner peripheral wall of the sound outlet channel is inclined so that the diameter of the sound outlet channel gradually increases in the direction from the sound outlet to the sound outlet channel;

[0012] The loudspeaker also includes a phase plug, which includes a first section located in the sound outlet channel. The outer peripheral wall of the first section is arranged at an angle so that the outer diameter of the first section gradually increases in the direction from the sound outlet to the sound outlet channel, and the outer peripheral wall of the first section is arranged parallel to and opposite to the inner peripheral wall of the sound outlet channel.

[0013] In one embodiment, the phase plug further includes a second section located in the sound outlet channel, the second section being connected to a side of the first section facing away from the sound outlet, and an outer peripheral wall of the second section being inclined such that an outer diameter of the second section gradually decreases in a direction from the sound outlet to the sound outlet channel.

[0014] The speaker also includes a shunt plug, which is located between the inner circumferential wall of the sound output channel and the outer circumferential wall of the second section. The shunt plug has a first outer circumferential wall and a first inner circumferential wall connected at an angle. The first outer circumferential wall is arranged parallel to and opposite to the inner circumferential wall of the sound output channel, and the first inner circumferential wall is arranged parallel to and opposite to the outer circumferential wall of the second section.

[0015] In one embodiment, the branch plug also has a second outer peripheral wall and a second inner peripheral wall connected at an angle, the first outer peripheral wall, the first inner peripheral wall, the second inner peripheral wall and the second peripheral wall are connected in sequence to form a closed loop, the second outer peripheral wall is parallel to the first inner peripheral wall, and the second inner peripheral wall is parallel to the first peripheral wall.

[0016] In one embodiment, the distance between the first section and the diaphragm is greater than the maximum displacement of the diaphragm during vibration; and / or,

[0017] The spacing between the first section and the diaphragm is less than one quarter of the minimum wavelength within the operating frequency of the loudspeaker.

[0018] In one embodiment, the sound outlet portion is located between the inner peripheral wall of the sound outlet channel and the outer peripheral wall of the first section to form an annular inlet, and the area of ​​the annular inlet is S t satisfy:

[0019]

[0020] Where Bl is the power coupling factor of the speaker, ρ0 is the air density, c is the speed of sound propagation in air, R e is the DC resistance of the voice coil, S dis the effective radiation area of ​​the diaphragm.

[0021] In one embodiment, a side of the housing facing the magnetic circuit assembly is provided with a notch communicating with the inner cavity;

[0022] The loudspeaker further includes a gasket, which is sandwiched between the folding ring and the magnetic circuit assembly. A portion of the gasket extends from the notch to form an extension portion.

[0023] In one embodiment, the magnetic circuit assembly includes soft iron, a magnet and a washer. The soft iron is arranged in a T shape. The magnet and the washer are sequentially arranged on the outside of the soft iron. The shell and the washer are surrounded to form an inner cavity.

[0024] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0025] The present application sets the folding ring to be planar and the folding ring part to be sandwiched between the shell and the magnetic circuit assembly, so that the folding ring will not reflect the sound waves in the front cavity, thereby effectively avoiding the problem of interference of sound waves in the front cavity and sound field confusion caused by the reflection of sound waves in the front cavity by the folding ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the solutions in the present application or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] Figure 1 It is a schematic diagram of the structure of the diaphragm in the prior art;

[0028] Figure 2 It is a structural diagram of an embodiment of a loudspeaker in this application;

[0029] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure along the AA plane;

[0030] Figure 4 It is a schematic diagram of the structure of the diaphragm and voice coil in this application;

[0031] Figure 5 yes Figure 3 Schematic diagram of the enlarged structure of the part B in the middle;

[0032] Figure 6 yes Figure 3 Schematic diagram of the structure of the middle shell;

[0033] Figure 7 yes Figure 3 Schematic diagram of the enlarged structure of the local C in the middle;

[0034] Figure 8 yes Figure 2 Schematic diagram of the explosion structure;

[0035] Figure 9 yes Figure 8 Schematic diagram of the structure of the middle gasket.

[0036] Figure numerals: 1000, loudspeaker; 100, shell; 100a, inner cavity; 100b, chamber; 100c, sound outlet channel; 100d, sound outlet; 100e, front cavity; 110f, annular inlet; 100g, gap; 200, magnetic circuit assembly; 210, soft iron; 220, magnet; 230, washer; 231, positioning column; 300, diaphragm; 310, diaphragm; 320, folding ring; 400, voice coil; 500, phase plug; 510, first section; 520, second section; 600, shunt plug; 610, first outer wall; 620, first inner wall; 630, second inner wall; 640, second outer wall; 700, gasket; 710, extension; 700a, holding mouth; 700b, positioning gap; 700c, connecting channel. DETAILED DESCRIPTION

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0038] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0039] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0040] The present application proposes a loudspeaker, which arranges the folding ring on the diaphragm into a flat shape, so that the shape of the folding ring is flat, rather than the traditional disordered shapes such as arc shape and arch shape. Therefore, the folding ring will not reflect the sound waves in the front cavity, and can effectively avoid the problem of interference of sound waves in the front cavity and chaotic sound field caused by the reflection of the sound waves in the front cavity by the folding ring.

[0041] See also Figures 2 to 5 The embodiment of the present application provides a loudspeaker 1000, which includes: a housing 100, a magnetic circuit assembly 200, a diaphragm 300, and a voice coil 400. In this embodiment, the diaphragm 300 and the diaphragm 310 and the folding ring 320 mentioned below are all made of the same Figure 1 The structures shown are numbered differently to distinguish them from the prior art.

[0042] The housing 100 and the magnetic circuit assembly 200 are arranged to form an inner cavity 100a. Figure 3 、 Figure 5 as well as Figure 6 The surface of the housing 100 facing the magnetic circuit assembly 200 is recessed with a chamber 100b, and the magnetic circuit assembly 200 is sealed to the open end of the chamber 100b to form the inner cavity 100a. This arrangement facilitates the formation of the inner cavity 100a. Furthermore, the housing 100 can have many shapes. The shape of the housing 100 can be a regular shape such as a square, a circle, an ellipse, or other irregular shapes, which are not specifically limited here.

[0043] The magnetic circuit assembly 200 includes a soft iron 210, a magnet 220 and a washer 230. The soft iron 210 is arranged in a T shape. The magnet 220 and the washer 230 are sequentially sleeved on the outside of the soft iron 210. The shell 100 and the washer 230 surround and form an inner cavity 100a.

[0044] See also Figure 5 and Figure 6 The housing 100 is provided with a sound outlet channel 100c and a sound outlet 100d connecting the sound outlet channel 100c and the inner cavity 100a. In this embodiment, the sound outlet channel 100c is arranged in a straight line and directly toward the center of the inner cavity 100a. This arrangement can minimize sound wave loss when sound waves are transmitted through the sound outlet channel 100c, thereby facilitating sound amplification through the speaker 1000. In other embodiments, the sound outlet channel 100c can also be configured in other shapes such as a curve or a broken line according to actual working conditions.

[0045] It can be understood that the inner cavity 100a and the sound output channel 100c can be set one to one; the inner cavity 100a and the sound output channel 100c can also be set one to many. In this case, the number of diaphragms 300 and the number of voice coils 400 are the same as the number of sound output channels 100c, and each sound output channel 100c corresponds to a diaphragm 300 and a voice coil 400. No specific limitation is made here.

[0046] See also Figure 3 and Figure 5 The diaphragm 300 is located in the inner cavity 100a and includes a diaphragm 310 and a folding ring 320. The outer periphery of the diaphragm 310 is connected to the inner periphery of the folding ring 320. The diaphragm 310 is arranged in an arc shape, protruding in the direction from the inner cavity 100a to the sound outlet 100d. The diaphragm 310 faces the sound outlet 100d. Specifically, the center area of ​​the diaphragm 310 faces the sound outlet 100d, so that the sound waves generated by the diaphragm 310 can be transmitted through the sound outlet 100d. The folding ring 320 is arranged in a planar shape and is sandwiched between the housing 100 and the magnetic circuit assembly 200, which facilitates the fixing of the diaphragm 300.

[0047] There are many ways to configure the fold 320 to be planar. The fold 320 can be planar in such a way that both axial surfaces of the fold 320 are planar. Alternatively, the fold 320 can be planar in such a way that both axial surfaces of the fold 320 are densely arranged in a W-shape or wavy pattern, so that both axial surfaces of the fold 320 are generally close to being planar, which can also achieve the same effect. This is not specifically limited here. Furthermore, the fold 320 can be planar in such a way that only the axial surface of the fold 320 near the sound outlet 100d is planar, while the axial surface of the fold 320 away from the sound outlet 100d is densely arranged in a W-shape or wavy pattern.

[0048] Specifically, the folding ring 320 is partially sandwiched between the shell 100 and the magnetic circuit assembly 200. This arrangement allows a distance to be created between the edge of the diaphragm 310 and the cavity wall of the inner cavity 100a adjacent to the sound outlet 100d, thereby preventing the diaphragm 310 from touching the cavity wall of the inner cavity 100a adjacent to the sound outlet 100d during vibration, thereby ensuring normal vibration of the diaphragm 310.

[0049] It can be understood that the larger the proportion of the folding ring 320 that is sandwiched between the shell 100 and the magnetic circuit assembly 200, the more stable the fixation of the diaphragm 300. Therefore, under the premise of ensuring that the vibration of the diaphragm 310 does not touch the cavity wall of the inner cavity 100a adjacent to the sound outlet 100d, the proportion of the folding ring 320 that is sandwiched between the shell 100 and the magnetic circuit assembly 200 should be increased as much as possible. For example, the proportion of the folding ring 320 that is sandwiched between the shell 100 and the magnetic circuit assembly 200 can be one-half, two-thirds, or other proportions of the folding ring 320.

[0050] In this embodiment, the fold ring 320 is provided in a circular ring shape, which facilitates the processing and forming of the fold ring 320. In other embodiments, the fold ring 320 may also be in an N-sided shape, where N is greater than or equal to 3.

[0051] Furthermore, the fold 320 and diaphragm 310 are integrally formed. This configuration eliminates the need for an assembly process to assemble the fold 320 and diaphragm 310, reducing the number of assembly steps required for the loudspeaker 1000 and improving assembly efficiency. The fold 320 and diaphragm 310 can be integrally formed in a variety of ways, including die forming, stamping, and other methods, which are not specifically limited herein.

[0052] The voice coil 400 is located within the inner cavity 100a. It is connected to the side of the surround 320 facing away from the sound outlet 100d and extends along the circumference of the surround 320. Furthermore, the inner circumferential wall of the voice coil 400 abuts the junction between the surround 320 and the diaphragm 310, shortening the distance between the voice coil 400 and the diaphragm 310 and facilitating the voice coil 400's ability to drive the diaphragm 310 to vibrate.

[0053] There are many ways to connect the voice coil 400 and the fold ring 320. The connection method between the voice coil 400 and the fold ring 320 can be a fixed connection method such as bonding, ultrasonic welding, welding, etc. The connection method between the voice coil 400 and the fold ring 320 can also be a detachable connection method such as threaded connection, snap connection, magnetic connection, etc., which is not specifically limited here.

[0054] Through the above-mentioned technical solution, the present application sets the folding ring 320 to be planar and partially sandwiched between the shell 100 and the magnetic circuit assembly 200, so that the folding ring 320 will not reflect the sound waves in the front cavity 100e, thereby effectively avoiding the problem of interference of sound waves and sound field confusion in the front cavity 100e caused by the folding ring 320 reflecting the sound waves in the front cavity 100e.

[0055] Understandably, see Figure 3 and 5The diaphragm 310, the folding ring 320, and the wall of the inner cavity 100a adjacent to the sound outlet 100d form the aforementioned front cavity 100e. Considering that if the shape of the wall of the inner cavity 100a adjacent to the sound outlet 100d is inconsistent with the shape of the diaphragm 310, it is easy to cause standing wave interference in the front cavity 100e. Therefore, in one embodiment of the present application, the wall of the inner cavity 100a adjacent to the sound outlet 100d is convex in the direction of the inner cavity 100a pointing to the sound outlet 100d and is arranged in an arc shape, so that the distance between any position of the wall of the inner cavity 100a adjacent to the sound outlet 100d and the corresponding position of the diaphragm 310 is the same. This configuration makes the shape of the wall of the inner cavity 100a adjacent to the sound outlet 100d consistent with the shape of the diaphragm 310, which can effectively avoid the formation of standing wave interference in the front cavity 100e.

[0056] See also Figure 3 、 Figure 5 and Figure 6 To prevent sound waves from interfering and canceling each other out as they propagate along the sound outlet channel 100c, in one embodiment of the present application, the inner wall of the sound outlet channel 100c is tilted so that the diameter of the sound outlet channel 100c gradually increases as the sound outlet 100d points toward the sound outlet channel 100c. The loudspeaker 1000 also includes a phase plug 500. The phase plug 500 includes a first section 510 located within the sound outlet channel 100c. The outer wall of the first section 510 is tilted so that the outer diameter of the first section 510 gradually increases as the sound outlet 100d points toward the sound outlet channel 100c. The outer wall of the first section 510 is parallel to and opposite to the inner wall of the sound outlet channel 100c.

[0057] Through the above-mentioned technical solution, by virtue of the setting of the first section 510 of the phase plug 500, the part of the sound outlet 100d located between the outer peripheral wall of the first section 510 and the inner peripheral wall of the sound outlet channel 100c is arranged in a ring shape, so that the wavefront formed by the sound wave at the outlet of the sound outlet channel 100c can be consistent, that is, the same sound wave phase, effectively avoiding sound wave interference and mutual cancellation when the sound waves are transmitted along the sound outlet channel 100c.

[0058] Furthermore, the end surface of the first section 510 near the diaphragm 310 is flush with the middle of the sound outlet 100d and is arranged in an arc shape, so that the distance between any position of the end surface of the first section 510 near the diaphragm 310 and the corresponding position in the center area of ​​the diaphragm 310 is the same. This arrangement ensures that the shape of the end surface of the first section 510 near the diaphragm 310 is consistent with the shape of the diaphragm 310, which can effectively prevent the formation of standing wave interference in the front cavity 100e.

[0059] See also Figure 3 、 Figure 5 and Figure 6To further prevent sound waves from interfering and canceling each other out along the sound channel 100c, in one embodiment of the present application, the phase plug 500 further includes a second section 520 located within the sound channel 100c. The second section 520 is connected to the side of the first section 510 facing away from the sound outlet 100d. The outer wall of the second section 520 is inclined such that the outer diameter of the second section 520 gradually decreases in the direction from the sound outlet 100d toward the sound channel 100c. The loudspeaker 1000 further includes a shunt plug 600 located between the inner wall of the sound channel 100c and the outer wall of the second section 520. The shunt plug 600 comprises a first outer wall 610 and a first inner wall 620 connected at an angle. The first outer wall 610 is arranged parallel to the inner wall of the sound channel 100c, while the first inner wall 620 is arranged parallel to the outer wall of the second section 520.

[0060] Through the above technical solution, on the basis of the first section 510 of the above-mentioned phase plug 500, the second section 520 of the phase plug 500 and the shunt plug 600 are added, and the first outer peripheral wall 610 and the first inner peripheral wall 620 of the shunt plug 600 are separated between the second section 520 of the phase plug 500 and the inner peripheral wall of the sound output channel 100c to form two annular channels. The widths of the two annular channels are the same, that is, the difference between the inner diameter and the outer diameter of the two annular channels is the same, and the sound wave travel distances in the two annular channels are the same, which can further avoid sound wave interference and mutual cancellation when the sound waves are transmitted along the sound output channel 100c.

[0061] Specifically, the outer wall of the second section 520 is conical, with the end of the second section 520 facing away from the first section 510 being flush with the middle of the exit of the sound outlet channel 100c. This arrangement allows the outer wall of the second section 520 to guide sound waves toward the exit of the annular channel, facilitating their transmission along the annular channel.

[0062] In this embodiment, the length of the first section 510 in the axial direction of the sound outlet 100d is shorter than the length of the second section 520 in the axial direction of the sound outlet 100d. This arrangement increases the length of the annular channel, allowing sound waves to enter the annular channel more quickly, further preventing interference and mutual cancellation of sound waves as they propagate along the sound outlet channel 100c.

[0063] See also Figure 3 、 Figure 5 and Figure 6In one embodiment of the present application, the shunt plug 600 further comprises a second outer peripheral wall 640 and a second inner peripheral wall 630 connected at an angle. The first peripheral wall 610, the first inner peripheral wall 620, the second inner peripheral wall 630, and the second peripheral wall 640 are sequentially connected to form a closed loop. The second outer peripheral wall 640 is parallel to the first inner peripheral wall 620, and the second inner peripheral wall 630 is parallel to the first peripheral wall 610. This arrangement, with the second outer peripheral wall 640 and the second inner peripheral wall 640, creates a horn-shaped outlet at the two annular channels. Sound waves are effectively amplified as they exit the annular channels, thereby maximizing the radiation efficiency of the speaker 1000.

[0064] Specifically, the vertical cross-section of the shunt plug 600 is diamond-shaped, ensuring that the first outer wall 610, first inner wall 620, second inner wall 630, and second outer wall 640 have the same length in the axial direction of the sound outlet 100d. This arrangement ensures that the widths of the two annular channels and the travel distance of sound waves within them are the same. Furthermore, the junction of the second inner wall 630 and the second outer wall 640 is flush with the outlet of the sound outlet channel 100c, allowing the shunt plug 600 to direct sound waves to the outlet of the annular channels.

[0065] See also Figure 3 、 Figure 5 and Figure 7 In order to prevent the diaphragm 310 from touching the end surface of the first section 510 close to the diaphragm 310 during vibration, in one embodiment of the present application, the distance D between the first section 510 and the diaphragm 310 is greater than the maximum displacement of the diaphragm 310 during vibration.

[0066] Furthermore, the distance D between the first section 510 and the diaphragm 310 is less than one-quarter of the minimum wavelength within the operating frequency of the speaker 1000. This arrangement prevents sound waves from reflecting and dissipating within the front cavity 100e, thereby improving sound radiation efficiency. The wavelength is calculated based on the speed of sound being equal to the operating frequency of the speaker 1000 multiplied by the wavelength. The speed of sound is 340 m / s, and the operating frequency of the speaker 1000 is measured using an instrument. For example, if the operating frequency of the speaker 1000 is 20 kHz, then one-quarter of the minimum wavelength is 4.25 mm.

[0067] Optionally, the distance between the first section 510 and the diaphragm 310 is a range formed by any one of one quarter, one fifth, one sixth, one seventh, one eighth, one ninth, or any two of the minimum wavelength within the operating frequency of the loudspeaker 1000 .

[0068] See also Figure 3 and Figure 6In one embodiment of the present application, the sound outlet 100d is located between the inner peripheral wall of the sound outlet channel 100c and the outer peripheral wall of the first section 510 to form an annular inlet 110f. The area of ​​the annular inlet 110f is S t satisfy:

[0069]

[0070] Where Bl is the power coupling factor of the speaker 1000, ρ0 is the air density, c is the speed of sound propagation in air, R e is the DC resistance of the voice coil 400, S d The effective radiation area of ​​the diaphragm 300 is the surface area of ​​the diaphragm 310 facing the sound outlet 100d plus the surface area of ​​the unclamped portion of the surround 320 facing the sound outlet 100d.

[0071] Through the above technical solution, based on the impedance matching theory, the area of ​​the above-mentioned annular inlet 110f, that is, the channel inlet cross-sectional area of ​​the phase plug 500, is designed, which can effectively improve the transmission efficiency of the loudspeaker 1000 to the greatest extent, thereby improving the sound radiation sensitivity of the loudspeaker 1000 system.

[0072] See also Figure 3 and Figure 8 In one embodiment of the present application, a notch 100g communicating with the inner cavity 100a is provided on the side of the shell 100 facing the magnetic circuit assembly 200; the speaker 1000 also includes a gasket 700, which is clamped between the folding ring 320 and the magnetic circuit assembly 200, and a portion of the gasket 700 extends from the notch 100g to form an extension portion 710.

[0073] Through the above technical solution, on the one hand, the gasket 700 can effectively eliminate the abnormal sound emitted by the diaphragm 300 during vibration; on the other hand, by holding the extension part 710, the gasket 700, the diaphragm 300 and the shell 100 can be separated from the magnetic circuit assembly 200, making it easy to disassemble the shell 100 and the magnetic circuit assembly 200.

[0074] Further, see Figure 8 and Figure 9 The extension portion 710 partially penetrates to form a holding opening 700 a to facilitate holding the gasket 700 .

[0075] Further, see Figure 8 and Figure 9The outer periphery of the gasket 700 is provided with a plurality of positioning notches 700b arranged at intervals along its circumference, and the side of the magnetic circuit assembly 200 facing the shell 100 is provided with a plurality of positioning posts 231, each positioning post 231 cooperates with the corresponding positioning notch 700b. Such an arrangement can enhance the stability of the gasket 700.

[0076] Further, see Figure 8 and Figure 9 The upper surface of the extension 710 is provided with a communication channel 700c that connects the inner cavity 100a with the external environment. This connection facilitates ventilation, reduces heat accumulation in the inner cavity 100a, and thus protects the speaker 1000 from heat damage. Furthermore, it reduces the weight of the gasket 700, helping to reduce the overall weight of the speaker 1000, making it more portable.

[0077] The loudspeaker 1000 further includes a horn (not shown), which is connected to the outlet of the sound outlet channel 100c. The cross-sectional area of ​​the connection between the horn and the sound outlet channel 100c is the same as the cross-sectional area of ​​the outlet of the sound outlet channel 100c.

[0078] The working mode of the loudspeaker 1000 in the present application is as follows: the voice coil 400 vibrates up and down under the action of electric current and magnetic field, driving the diaphragm 310 to move, thereby radiating sound waves into the front cavity 100e. The sound waves first enter the sound outlet 100d located between the outer peripheral wall of the first section 510 and the inner peripheral wall of the sound outlet channel 100c through the front cavity 100e, and then pass through the phase plug 500 and the branch plug 600 to be divided into two paths. Finally, the sound waves enter the throat of the horn and radiate sound pressure outward from the horn outlet.

[0079] Obviously, the embodiments described above are only some of the embodiments of the present application, rather than all of the embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned specific embodiments, or to make equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the present application specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present application.

Claims

1. A loudspeaker, characterized in that: The speaker comprises: a housing, a magnetic circuit assembly, a diaphragm and a voice coil; wherein, The housing and the magnetic circuit assembly are enclosed to form an inner cavity, the housing is provided with a sound outlet channel and a sound outlet communicating with the sound outlet channel and the inner cavity, and the diaphragm and the voice coil are both located in the inner cavity; The diaphragm includes a diaphragm and a folding ring; the outer periphery of the diaphragm is connected to the inner periphery of the folding ring, the diaphragm protrudes in the direction from the inner cavity to the sound outlet and is arranged in an arc shape, and the diaphragm faces the sound outlet; the folding ring is arranged in a planar shape, and the folding ring is clamped between the shell and the magnetic circuit assembly; the voice coil is connected to the side of the folding ring facing away from the sound outlet and extends along the circumference of the folding ring.

2. The loudspeaker according to claim 1, wherein The cavity wall of the inner cavity adjacent to the sound outlet protrudes in the direction from the inner cavity to the sound outlet and is arranged in an arc shape, so that the distance between any position of the cavity wall of the inner cavity adjacent to the sound outlet and the corresponding position of the diaphragm is the same.

3. The loudspeaker according to claim 1, wherein The folding ring and the diaphragm are integrally formed.

4. The loudspeaker according to claim 1, wherein The inner peripheral wall of the sound outlet channel is arranged to be inclined so that the diameter of the sound outlet channel gradually increases in the direction from the sound outlet to the sound outlet channel; The loudspeaker also includes a phase plug, which includes a first section located in the sound outlet channel. The outer peripheral wall of the first section is arranged at an angle so that the outer diameter of the first section gradually increases in the direction from the sound outlet to the sound outlet channel, and the outer peripheral wall of the first section is arranged parallel to and opposite to the inner peripheral wall of the sound outlet channel.

5. The loudspeaker according to claim 4, characterized in that The phase plug further includes a second section located in the sound outlet channel, the second section being connected to a side of the first section facing away from the sound outlet, and the outer peripheral wall of the second section being inclined such that the outer diameter of the second section gradually decreases in a direction from the sound outlet to the sound outlet channel; The speaker also includes a shunt plug, which is located between the inner circumferential wall of the sound output channel and the outer circumferential wall of the second section. The shunt plug has a first outer circumferential wall and a first inner circumferential wall connected at an angle. The first outer circumferential wall is arranged parallel to and opposite to the inner circumferential wall of the sound output channel, and the first inner circumferential wall is arranged parallel to and opposite to the outer circumferential wall of the second section.

6. The loudspeaker according to claim 5, characterized in that The shunt plug also has a second outer peripheral wall and a second inner peripheral wall connected at an angle, the first outer peripheral wall, the first inner peripheral wall, the second inner peripheral wall and the second peripheral wall are connected in sequence to form a closed loop, the second outer peripheral wall is parallel to the first inner peripheral wall, and the second inner peripheral wall is parallel to the first peripheral wall.

7. The loudspeaker according to claim 4, characterized in that The distance between the first section and the diaphragm is greater than the maximum displacement of the diaphragm during vibration; and / or, The spacing between the first section and the diaphragm is less than one quarter of the minimum wavelength within the operating frequency of the loudspeaker.

8. The loudspeaker according to claim 4, characterized in that The sound outlet is located between the inner peripheral wall of the sound outlet channel and the outer peripheral wall of the first section to form an annular inlet. The area of ​​the annular inlet is S t satisfy: Where Bl is the power coupling factor of the speaker, ρ0 is the air density, c is the speed of sound propagation in air, R e is the DC resistance of the voice coil, S d is the effective radiation area of ​​the diaphragm.

9. The loudspeaker according to any one of claims 1 to 8, characterized in that A notch communicating with the inner cavity is provided on a side of the shell facing the magnetic circuit assembly; The loudspeaker further includes a gasket, which is sandwiched between the folding ring and the magnetic circuit assembly. A portion of the gasket extends from the notch to form an extension portion.

10. The loudspeaker according to any one of claims 1 to 8, characterized in that The magnetic circuit assembly includes soft iron, a magnet and a washer. The soft iron is arranged in a T shape. The magnet and the washer are sequentially sleeved on the outside of the soft iron. The shell and the washer are surrounded to form an inner cavity.

Images