Passive radiators and sound-generating devices

Abstract

The present invention discloses a passive radiator and a sound-generating device, wherein the passive radiator comprises a frame, a diaphragm, a folding ring and a damping assembly, wherein the frame is formed with an opening; the diaphragm is arranged in the opening; the inner side of the folding ring is connected to the diaphragm, and the outer side is connected to the edge of the opening; the damping assembly comprises a first damping member and a second damping member connected to each other, wherein the first damping member is arranged on the surface of the diaphragm, and the second damping member is arranged on the surface of the folding ring, and the first damping member is arranged centrally symmetrically on the surface of the diaphragm, the first damping member is an elastic material, and the second damping member is a flexible material. The passive radiator of the present invention can increase the low-frequency vibration frequency and increase the radiation amount without distortion.

Description

Technical Field

[0001] The present invention relates to the technical field of sound-generating device structures, and in particular to a passive radiator and a sound-generating device. Background Art

[0002] Passive radiators are commonly known as fake speakers. They do not contain a driving system themselves, but rely on active speakers to work. They are driven to convert the heat and kinetic energy generated by the compressed air due to vibration during the acoustic-electrical transduction process of the active speaker into sound signals. Generally, passive radiators are composed of a diaphragm, a folding ring, and structural parts. In order to improve the low-frequency radiation effect, the existing structure only adds a counterweight to the diaphragm, which can reduce the low-frequency resonance frequency, but also makes the diaphragm too heavy to push, and the sensitivity decreases; and other structures improve compliance by replacing the folding ring material to make it easy to deform, but it is easy to cause the diaphragm to tilt, flip, and distort, and the effect of improving low frequencies is not good. Summary of the invention

[0003] The main purpose of the present invention is to provide a passive radiator, which increases the mass of the diaphragm through a first damping member, reduces the low-frequency resonance frequency, and combines the high compliance of the folding ring material to make the diaphragm easy to push, and then combines the second damping member to eliminate the diaphragm's easy flipping distortion caused by the change in the compliance of the folding ring, aiming to reduce the low-frequency resonance frequency while keeping the diaphragm undistorted.

[0004] To achieve the above object, the present invention provides a passive radiator, the passive radiator comprising:

[0005] a frame, the frame being formed with an opening;

[0006] a diaphragm disposed in the opening;

[0007] A fold ring, the inner side of which is connected to the diaphragm, and the outer side of which is connected to the opening edge; and

[0008] A damping component, wherein the damping component includes a first damping member and a second damping member connected to each other, wherein the first damping member is arranged on the surface of the diaphragm, and the second damping member is arranged on the surface of the folding ring, and the first damping member is arranged centrally symmetrically on the surface of the diaphragm, the first damping member is an elastic material, and the second damping member is a flexible material.

[0009] In one embodiment, the first damping member is disposed on the inner surface of the diaphragm, and the second damping member is disposed on the inner surface of the folding ring.

[0010] In one embodiment, the first damping member is planar and is attached to the surface of the diaphragm;

[0011] And / or, the second damping member is in a curved shape and fits onto the surface of the folding ring.

[0012] In one embodiment, the frame is rectangular, the first damping member is in an "X"-shaped plate shape, and the four ends of the first damping member are respectively connected to the four sides or four corners of the frame through the second damping member.

[0013] In one embodiment, four second damping members are provided, and the four damping members are respectively connected to four ends of the first damping member.

[0014] In one embodiment, a third damping member is disposed on the inner surface of the frame, the third damping member is connected to an end of the second damping member away from the first damping member, and the third damping member is made of a rigid material and has a first preset hardness value.

[0015] In one embodiment, at least two fixing parts are provided on the periphery of the frame, and a fourth damping member is provided on the inner surface of each of the fixing parts. The fourth damping member is connected to an end of the third damping member away from the first damping member, and the third damping member is made of rigid material and has a second preset hardness value.

[0016] In one embodiment, the passive radiator further includes a support frame, which is disposed on the inner side of the frame and forms a vibration space with the diaphragm, and the periphery of the support frame is connected to the fourth damping member and / or the third damping member.

[0017] In one embodiment, the support frame includes a support bottom and a connecting portion extending from a peripheral edge of the support bottom, the connecting portion is connected to the fourth damping member, and the support bottom is cross-shaped;

[0018] And / or, the support frame is made of a rigid material and has a third preset hardness value.

[0019] The present invention further provides a sound-generating device, comprising a speaker and a passive radiator, wherein the passive radiator is any of the passive radiators described above.

[0020] The passive radiator of the technical solution of the present invention includes a frame, a diaphragm and a folding ring connecting the diaphragm and the frame. A first damping member is arranged on the surface of the diaphragm to increase the mass of mechanical vibration and reduce the low-frequency resonance frequency of the passive radiator. At the same time, the folding ring is designed to be made of a material with higher compliance to avoid the reduction of loudness and low-frequency volume due to the increase in mass causing the diaphragm to be unable to push the original air mass. In combination, a second damping member is also arranged on the folding ring, and the second damping member is connected to the first damping member. The second damping member is a flexible material. In this way, it can be ensured that the compliance of the folding ring is not damaged. The first damping member is an elastic material with fast vibration recovery. The stability of the second damping member is guaranteed by the first damping member, thereby ensuring that the diaphragm and the folding ring vibrate along their axial direction without eccentric movement, effectively reducing the risk of distortion and improving the stability performance of the passive radiator. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of an embodiment of a passive radiator of the present invention;

[0023] Figure 2 for Figure 1 A schematic structural diagram of the passive radiator from another perspective;

[0024] Figure 3 for Figure 1 A schematic structural diagram of the passive radiator shown in FIG. 1 from another perspective;

[0025] Figure 4 for Figure 1 A cross-sectional view of the passive radiator shown.

[0026] Description of Figure Numbers:

[0027] Label name Label name 100 Passive Radiator 61 Support bottom 10 frame 63 Connection 20 Fixed part 70 Damping components 21 Mounting holes 71 The first damping element 30 Diaphragm 73 Second damping element 50 Folding ring 75 The third damping element 60 Support frame 77 Fourth damping element

[0028] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.

[0032] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] The present invention provides a passive radiator 100 .

[0034] Please combine Figure 1 and Figure 2 In one embodiment of the present invention, the passive radiator 100 includes a frame 10, a diaphragm 30, a folding ring 50 and a damping assembly 70, wherein the frame 10 is formed with an opening; the diaphragm 30 is arranged in the opening; the inner side of the folding ring 50 is connected to the diaphragm 30, and the outer side is connected to the edge of the opening; the damping assembly 70 includes a first damping member 71 and a second damping member 73 connected to each other, wherein the first damping member 71 is arranged on the surface of the diaphragm 30, and the second damping member 73 is arranged on the surface of the folding ring 50, and the first damping member 71 is centrally symmetrically arranged on the surface of the diaphragm 30, the first damping member 71 is an elastic material, and the second damping member 73 is a flexible material.

[0035] In this embodiment, the passive radiator 100 is applied to a sound-generating device. As an important component of low-frequency sound effects in the sound-generating device, it includes a frame 10, a diaphragm 30 and a folding ring 50. It is similar to the vibration system of a speaker, but there is no magnetic circuit system. It is forced to vibrate and make sound by the vibration of the speaker. Among them, the frame 10 is used as a mounting base for mounting and fixing the diaphragm 30. Its material can be metal, hard plastic, etc., which can play a good supporting role. A through opening is opened in the middle of the frame 10 to accommodate the diaphragm 30, so the shape of the frame 10 is roughly annular, such as a circular ring, a square ring or other polygonal ring or irregular ring. The diaphragm 30 is arranged in the opening, and its shape matches the shape of the frame 10, so that it can have a higher space utilization rate and a better vibration effect. For example, when the frame 10 is a rectangular ring, the shape of the diaphragm 30 is also a rectangle. Similarly, when the diaphragm 30 and the frame 10 have the same shape, the shape of the folding ring 50 used to connect the two is also the same as the above two.

[0036] Here, the connection between the folding ring 50 and the frame 10 can be adhesive, for example, the outer edge of the folding ring 50 can overlap the upper surface of the frame 10 or be connected to the inner side of the frame 10, which is not limited here. The folding ring 50 and the diaphragm 30 can be an integrally formed structure, which is convenient for processing and has good structural stability and is not prone to breakage. The material of the diaphragm 30 and the folding ring 50 is an elastic material, such as plastic or rubber, so that it is easier to vibrate and easier to recover. A first damping member 71 is provided on the diaphragm 30. The material of the first damping member 71 is an elastic material, such as rubber or silicone, which has a large density and increases the overall mass of the diaphragm 30. The first damping member 71 can be a plane or a curved surface, a block or a strip, and is not limited here. It only needs to be symmetrically arranged relative to the center of the diaphragm 30, that is, the first damping member 71 is rotated 180 degrees with the center of the diaphragm 30 as the origin to coincide with the original shape, so that the diaphragm 30 will not vibrate away from its axial direction, that is, the distortion of flipping to one side will not occur, thereby improving the sound effect. The connection method between the first damping member 71 and the diaphragm 30 is also not limited, and can be bonding, etc.

[0037] On the basis of the structure in which the first damping member 71 is provided, a material of the folding ring 50 with higher compliance is selected compared to the structure in which the first damping member 71 is not provided. The material can be set by changing the ratio of each component of the rubber. The specific ratio is not described in detail and does not belong to the invention point of the present invention. At the same time, a second damping member 73 is provided on the surface of the folding ring 50. The second damping member 73 is connected to the first damping member 71, and the second damping member 73 is a flexible material, which does not affect the compliance of the folding ring 50, and ensures that the folding ring 50 and the diaphragm 30 vibrate along their axial direction, which is the centering effect on the diaphragm 30 and the folding ring 50. For example, the material of the second damping member 73 is rubber, silicone, etc. with better flexibility.

[0038] The passive radiator 100 of the technical solution of the present invention includes a frame 10, a diaphragm 30 and a folding ring 50 connecting the diaphragm 30 and the frame 10. A first damping member 71 is arranged on the surface of the diaphragm 30 to increase the mass of mechanical vibration and reduce the low-frequency resonance frequency of the passive radiator 100. At the same time, the material of the folding ring 50 is selected to be a material with higher compliance to avoid the reduction of loudness and low-frequency quantity due to the increase in mass causing the diaphragm 30 to be unable to push the original air mass. In combination, a second damping member 73 is also arranged on the folding ring 50, and the second damping member 73 is connected to the first damping member 71. The second damping member 73 is a flexible material, so that the compliance of the folding ring 50 is not damaged. The first damping member 71 is an elastic material. The stability of the second damping member 73 is ensured by the first damping member 71, thereby ensuring that the diaphragm 30 and the folding ring 50 reciprocate along their axial direction without eccentricity, effectively reducing the risk of distortion and improving the stability of the passive radiator 100.

[0039] Please continue to refer to Figure 2 In one embodiment, the first damping member 71 is disposed on the inner surface of the diaphragm 30 , and the second damping member 73 is disposed on the inner surface of the folding ring 50 .

[0040] In this embodiment, in order to improve the appearance of the passive radiator 100, the first damping member 71 is arranged on the inner surface of the diaphragm 30. Here, the folding ring 50 is convex toward the outer surface of the diaphragm 30, so the second damping member 73 connected to the first damping member 71 is also arranged on the inner surface of the folding ring 50, thereby improving the low-frequency resonance frequency of the passive radiator 100 while also making it have better aesthetics.

[0041] In one embodiment, the first damping member 71 is planar and is attached to the surface of the diaphragm 30;

[0042] And / or, the second damping member 73 is in a curved shape and is attached to the surface of the folding ring 50 .

[0043] In this embodiment, in order to achieve a better low-frequency effect, since the diaphragm 30 is generally planar, the first damping member 71 is set to be planar and is attached to the surface of the diaphragm 30, so that it has a good fitting effect with the diaphragm 30, making the two more closely combined, making it easier to cause low-frequency resonance, and improving its low-frequency performance.

[0044] Similarly, because the fold ring 50 is curved, the second damping member 73 is also curved and fits onto the surface of the fold ring 50 , thereby enhancing the integrity with the fold ring 50 . While providing a centering effect, it minimizes the impact on the up and down vibration of the fold ring 50 .

[0045] Please combine Figure 2 and Figure 3 In one embodiment, the frame 10 is rectangular, the first damping member 71 is an “X”-shaped plate, and the four ends of the first damping member 71 are respectively connected to the four sides or four corners of the frame 10 through the second damping member 73.

[0046] In this embodiment, the frame 10 is in a rectangular shape, that is, a rectangular ring, and the four corners of the rectangle are chamfered to form a smooth arc transition structure, which improves the appearance of the passive radiator 100 and reduces sharp edges to improve safety performance. The first damping member 71 is set in an "X" shape and is plate-shaped, which can be attached to the surface of the diaphragm 30. While having good integrity, the mass of the first damping member 71 can be well controlled to reduce the low-frequency resonance frequency to avoid the diaphragm 30 from being too heavy; and it can maintain a good balance to prevent the diaphragm 30 from flipping over and avoid distortion.

[0047] Here, optionally, the first damping member 71 can be in the shape of a vertically crossed cross, and the four ends are connected to the four sides of the frame 10 through the second damping member 73, or the first damping member 71 can be in the shape of a non-vertically crossed X, and the four ends are connected to the four corners of the frame 10 through the second damping member 73, both of which can achieve the above effects.

[0048] Of course, in other embodiments, the first damping member 71 may also be configured to be ring-shaped in the middle, with four branches connected to the outer periphery of the ring. Here, the area of ​​the ring portion needs to be controlled within a smaller range to enhance its centering effect.

[0049] Please continue to refer to Figure 3 In one embodiment, four second damping members 73 are provided, and the four second damping members 73 are respectively connected to four ends of the first damping member 71 .

[0050] In this embodiment, four second damping members 73 are provided, and the four second damping members 73 are respectively connected to the four ends of the first damping member 71. Thus, while ensuring the axial reciprocating motion of the folding ring 50 along the diaphragm 30, the use of the material of the second damping member 73 can be reduced to avoid damaging the compliance of the folding ring 50. This, together with the weight increase of the first damping member 71, improves the low-frequency performance without affecting the overall compliance of the passive radiator 100.

[0051] Optionally, the width of the second damping member 73 along the circumferential direction of the folding ring 50 is the same as the width of the first damping member 71 , which facilitates manufacturing and improves material utilization.

[0052] Please refer again Figure 3 In one embodiment, a third damping member 75 is provided on the inner surface of the frame 10, and the third damping member 75 is connected to an end of the second damping member 73 away from the first damping member 71, and the third damping member 75 is a rigid material and has a first preset hardness value.

[0053] In this embodiment, in order to further enhance the centering effect of the folding ring 50, a third damping member 75 is also provided on the inner surface of the frame 10. Here, the third damping member 75 is connected to the end of the second damping member 73 away from the first damping member 71, and the third damping member 75 is a rigid material and has a first preset hardness value. The first preset hardness value is not limited to its range, and it can be greater than a general elastic material. For example, the selected material is stainless steel or aluminum alloy, etc., and its hardness and stiffness are greater than the first damping member 71 and the second damping member 73, thereby further improving the stability, effectively ensuring the reciprocating motion of the folding ring 50 and the diaphragm 30 along their axial direction, and will not affect the original compliance of the folding ring 50, thereby ensuring the low-frequency performance of the passive radiator 100.

[0054] Please combine Figures 1 to 3 In one embodiment, at least two fixing portions 20 are provided on the periphery of the frame 10, and a fourth damping member 77 is provided on the inner surface of each of the fixing portions 20. The fourth damping member 77 is connected to an end of the third damping member 75 away from the first damping member, and the fourth damping member 77 is made of a rigid material and has a second preset hardness value.

[0055] In this embodiment, in order to facilitate the fixation of the passive radiator 100, at least two fixing parts 20 are provided on the periphery of the frame 10 for connection and fixation with the sound-emitting device used. Here, the fixing part 20 can be sheet-shaped or plate-shaped, directly connected by bonding; it can also be hole-shaped, connected by threading; or it can be provided with a bump or a card hole, connected by a snap-on connection, etc., which is not limited here. Optionally, the center line of the two fixing parts 20 passes through the center of the frame 10, so that the two fixing parts 20 are symmetrically distributed with the center of the frame 10 as the center, thereby providing a stable fixing structure for the passive radiator, making it less likely to shake.

[0056] Here, a fourth damping member 77 is also provided on the inner surface of each fixing portion 20. The fourth damping member 77 is connected to the end of the third damping member 75 away from the first damping member 71, and the fourth damping member 77 is also a rigid material with a second preset hardness value. The second preset hardness value is not limited to its range, and it can be greater than a general elastic material. For example, the selected material is stainless steel or aluminum alloy. The third damping member 75 is indirectly connected to the second damping member 73, thereby further ensuring the centering movement of the folding ring 50 and the diaphragm 30, and further preventing the distortion of the passive radiator 100. Here, the second preset hardness value can be greater than or equal to the first preset hardness value, thereby further improving the structural stability of the passive radiator 100.

[0057] In one embodiment, in order to enhance the installation stability of the fixing part 20, four fixing parts 20 are provided, and the fixing part 20 is provided with a mounting hole 21, and the shape of the mounting hole 21 is circular. The fixing part 20 is fixed by threaded connection, which is convenient for assembly and disassembly and maintenance. Of course, a hole corresponding to the mounting hole 21 is also provided on the fourth damping member 77, so that the stability of the fixation can be increased. The shape of the fixing part 20 is rectangular, and the connection area can be increased by increasing the area of ​​the fixing part 20, which is not limited by the space of the frame 10 itself, so that the installation stability of the frame 10 can be significantly improved, and the structural stability of the passive radiator 100 can be improved.

[0058] It is understandable that when the frame 10 vibrates with the diaphragm 30, due to the fixed position of the two fixing parts 20, the vibration will inevitably be amplified at the two fixing parts 20, thereby causing a larger resonance amplitude. Therefore, the frame 10 and the fixing part 20 are set as an integrally formed structure, for example, when both are made of plastic or plastic material, injection molding is used for integral molding; or when both are made of metal, casting is used for integral molding, so as to effectively improve the structural strength and stability of the passive radiator 100 and improve the processing efficiency.

[0059] Please combine Figure 3 and Figure 4In one embodiment, the passive radiator 100 also includes a support frame 60, which is arranged on the inner side of the frame 10 and forms a vibration space between the support frame 60 and the diaphragm 30, and the periphery of the support frame 60 is connected to the fourth damping member 77 and / or the third damping member 75.

[0060] In this embodiment, in order to further improve the stability of the centering movement of the diaphragm 30 and the folding ring 50, a support frame 60 is further provided on the inner side of the frame 10. The material of the support frame 60 can be a rigid material and has a third preset hardness value, with high structural strength and a better supporting effect. The third preset hardness value can be the same as the hardness value of the fourth damping member 77, or even higher, so as to play a better fixing role. For example, the material of the support frame 60 is metal, stainless steel or aluminum alloy.

[0061] The support frame 60 and the diaphragm 30 need to be separated by a certain distance, so as to form a vibration space for the diaphragm 30, avoid interference with the vibration of the diaphragm 30, and ensure that the sound-generating function of the passive radiator 100 is not affected. The periphery of the support frame 60 can be connected to the third damping member 75, the fourth damping member 77, or the connection between the third damping member 75 and the fourth damping member 77. The connection between the fourth damping member 77, the support frame 60, the third damping member 75 and the second damping member 73 can provide further stable support, ensuring that the folding ring 50 and the diaphragm 30 do not flip and vibrate, and there will be no distortion while improving the low-frequency performance.

[0062] Please continue to refer to Figure 3 and Figure 4 In one embodiment, the support frame 60 includes a support bottom 61 and a connecting portion 63 extending from the periphery of the support bottom 61, the connecting portion 63 is connected to the fourth damping member 77, and the support bottom 61 is cross-shaped.

[0063] Here, the support frame 60 includes a support bottom 61 and a connecting portion 63. The support bottom 61 is located opposite to the diaphragm 30, and the support bottom 61 is planar. The support bottom 61 and the connecting portion 63 are arranged at an angle, which can improve the structural stability and strength of the support bottom 61, and at the same time, can provide a certain buffering effect on the resonance of the frame 10. The support bottom 61 is arranged in a cross shape, which can save materials and provide a more stable support effect. When the first damping member 71 is also in a cross shape, it can correspond to the structure of the four fixing portions 20, and the four ends of the support bottom 61 can be connected to the four fourth damping members 77, thereby maximizing the effect of the reciprocating motion of the folding ring 50 and the diaphragm 30 along the axial direction thereof, and can support the fixing portion 20, effectively ensuring the installation stability of the passive radiator 100.

[0064] Optionally, the angle between the supporting bottom 61 and the connecting portion 63 is a right angle, so as to ensure the vibration space to the greatest extent, provide better support, and improve the low-frequency performance of the passive radiator 100.

[0065] The present invention further provides a sound-generating device (not shown), the sound-generating device comprising a speaker and a passive radiator 100, the passive radiator 100 being any of the above-described passive radiators 100. Since the passive radiator 100 of the sound-generating device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0066] Here, the sound device can be an audio device or an electronic device, such as a speaker, a mobile phone, a headset, etc., which is not limited here. Of course, the sound device can also be used in a vehicle as a car audio system, etc.

[0067] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A passive radiator, characterized in that: The passive radiator comprises: a frame, the frame being formed with an opening; a diaphragm, the diaphragm being disposed in the opening; A fold ring, the inner side of which is connected to the diaphragm, and the outer side of which is connected to the opening edge; and A damping component, the damping component comprising a first damping member and a second damping member connected to each other, the first damping member being arranged on the surface of the diaphragm, the second damping member being arranged on the surface of the folding ring, the first damping member being arranged centrally symmetrically on the surface of the diaphragm, the first damping member being made of an elastic material, and the second damping member being made of a flexible material; The first damping member is planar and is attached to the surface of the diaphragm.

2. The passive radiator according to claim 1, characterized in that The first damping member is arranged on the inner surface of the diaphragm, and the second damping member is arranged on the inner surface of the folding ring.

3. The passive radiator according to claim 1, characterized in that The second damping member is in a curved shape and is attached to the surface of the folding ring.

4. The passive radiator according to claim 1, characterized in that The frame is rectangular, the first damping member is in an "X"-shaped plate shape, and the four ends of the first damping member are respectively connected to the four sides or four corners of the frame through the second damping member.

5. The passive radiator according to claim 4, characterized in that There are four second damping members, and the four second damping members are respectively connected to four ends of the first damping member.

6. The passive radiator according to claim 4 or 5, characterized in that: A third damping member is disposed on the inner surface of the frame. The third damping member is connected to an end of the second damping member away from the first damping member. The third damping member is made of a rigid material and has a first preset hardness value.

7. The passive radiator according to claim 6, characterized in that At least two fixing parts are provided on the periphery of the frame, and a fourth damping member is provided on the inner surface of each fixing part. The fourth damping member is connected to an end of the third damping member away from the first damping member. The third damping member is made of rigid material and has a second preset hardness value.

8. The passive radiator according to claim 7, characterized in that The passive radiator further comprises a support frame, which is arranged on the inner side of the frame and forms a vibration space between the support frame and the diaphragm, and the periphery of the support frame is connected to the fourth damping member and / or the third damping member.

9. The passive radiator according to claim 8, characterized in that The support frame comprises a support bottom and a connecting portion extending from the periphery of the support bottom by bending, the connecting portion is connected to the fourth damping member, and the support bottom is in a cross shape; And / or, the support frame is made of a rigid material and has a third preset hardness value.

10. A sound-generating device, characterized in that: The sound-generating device comprises a speaker and a passive radiator, and the passive radiator is the passive radiator according to any one of claims 1 to 9.

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