Sound generating device and terminal device

Abstract

The present invention discloses a sound generating device and a terminal device. The sound generating device includes a housing, a sound generating element, and a blocking member. An installation cavity is provided in the housing. The housing further has a ventilation cavity spaced from the installation cavity. Both ends of the ventilation cavity penetrate through opposite sides of the housing, and the ventilation cavity is located at the center of the installation cavity. The sound generating element is disposed in the installation cavity. The blocking member is movably connected to the housing and is movably disposed in the ventilation cavity to block or open the ventilation cavity. The present invention aims to provide a sound generating device capable of adjusting the leakage amount, which can achieve the conversion between a transparent mode and a sound quality mode and effectively improve the low-frequency performance.

Description

Technical Field

[0001] The present invention relates to the technical field of sound - generating devices, and particularly to a sound - generating device and a terminal device applying the sound - generating device. Background Art

[0002] With the rapid development of the consumer electronics industry, especially TWS earphones, the terminal consumers have higher and higher requirements for the usage experience of devices. In addition to the basic sound quality requirements, the user experiences such as supporting comfort and safety are further increased.

[0003] Under this background, each earphone manufacturer has put forward higher performance requirements for earphone functions / user experiences. In related technologies, in order to improve the user's perception of external sounds after wearing earphones, generally two methods are adopted. One is to use a Mic to pick up external sounds and replay them with an earphone speaker. This method has problems such as high feedback delay, high distortion, and occasional whistling. The other is to open a hole in the center of the earphone and directly conduct with the outside through a physical structure. This method has problems such as excessive low - frequency loss and the inability to turn off the transparent mode. Summary of the Invention

[0004] The main object of the present invention is to provide a sound - generating device and a terminal device, aiming to provide a sound - generating device capable of adjusting the leakage amount, which can realize the conversion between the transparent mode and the sound quality mode and effectively improve the low - frequency performance.

[0005] To achieve the above object, the present invention proposes a sound - generating device, and the sound - generating device includes:

[0006] A housing, an installation cavity is provided in the housing, and the housing further has a ventilation cavity spaced from the installation cavity. Both ends of the ventilation cavity penetrate through opposite sides of the housing, and the ventilation cavity is located at the center of the installation cavity;

[0007] A sound - generating element, the sound - generating element is arranged in the installation cavity; and

[0008] A plugging member, the plugging member is movably connected to the housing and is movably arranged in the ventilation cavity to block or open the ventilation cavity.

[0009] In one embodiment, a leakage channel is formed by enclosing the outer wall of the plugging member and the inner wall of the ventilation cavity, and the plugging member is provided with a stop portion for blocking the leakage channel.

[0010] In one embodiment, the ratio of the cross - sectional area of the leakage channel to the cross - sectional area of the ventilation cavity is greater than or equal to 1:4.

[0011] In one embodiment, the ventilation cavity includes a first through cavity and a second through cavity that are connected and communicate with each other. The cross-sectional area of the second through cavity is larger than that of the first through cavity, so that a stepped surface is formed at the connection between the second through cavity and the first through cavity;

[0012] The plugging member is movably received in the second through cavity, so that the peripheral wall of the plugging member cooperates with the cavity wall of the second through cavity to form the air leakage channel. The plugging member abuts against and is limited by the stepped surface, so that the air leakage channel communicates with or is blocked from the first through cavity.

[0013] In one embodiment, a leakage groove is provided on the inner wall of the second through cavity. The plugging member is movably received in the second through cavity, so that the peripheral wall of the plugging member cooperates with the leakage groove to form the air leakage channel;

[0014] A retaining edge protrudes from one end of the plugging member away from the stepped surface. The retaining edge forms the stopping portion to block or open one end of the leakage groove away from the stepped surface.

[0015] In one embodiment, the extending direction of the leakage groove is the same as the extending direction of the ventilation cavity; or, the leakage groove is spirally arranged along the cavity wall of the second through cavity;

[0016] And / or, there are a plurality of the leakage grooves, and the plurality of leakage grooves are arranged at intervals along the circumferential direction of the second through cavity. The retaining edge extends along the periphery of the plugging member to form an annular protrusion.

[0017] In one embodiment, the housing includes:

[0018] A first housing, the first housing is provided with the first through cavity and a first installation groove surrounding the first through cavity; and

[0019] A second housing, the second housing is provided with the second through cavity and a second installation groove surrounding the second through cavity. The first housing is connected to the second housing, so that the first through cavity and the second through cavity are correspondingly connected to form the ventilation cavity, and the first installation groove and the second installation groove enclose to form the installation cavity.

[0020] In one embodiment, the first housing includes a central connection section, a top wall section surrounding the central connection section, and an outer fixing section connected to the outside of the top wall section. The outer fixing section, the top wall section, and the central connection section enclose to form the first installation groove. The central connection section is arranged in a cylindrical shape and forms the first through cavity;

[0021] The second housing includes an inner sidewall, a bottom wall disposed around the inner sidewall, and an outer sidewall connected to the outside of the bottom wall. The outer sidewall, the bottom wall, and the inner sidewall enclose to form the second mounting groove. The inner sidewall includes a vertical section connected to the bottom wall and a flat section. The vertical section is arranged in a cylindrical shape and forms the second through cavity. The flat section is connected to one end of the vertical section away from the bottom wall and extends toward the inside of the second through cavity;

[0022] Wherein, the central connection section is connected to the flat section, so that a stepped surface is formed on a side of the flat section facing away from the central connection section, and the outer fixing section is correspondingly connected to the outer sidewall.

[0023] In one embodiment, the diaphragm of the sounding element corresponds to the top wall section, and the top wall section is arranged in a convex arc shape;

[0024] And / or, the top wall section is provided with a sound outlet hole communicating with the mounting cavity;

[0025] And / or, the connection between the vertical section and the flat section is provided with a rounded corner or an oblique angle.

[0026] In one embodiment, the plugging member is threadedly connected to the cavity wall of the ventilation cavity;

[0027] Or, the plugging member is movably connected to the housing through an elastic snap structure.

[0028] In one embodiment, the sounding device is applied to a terminal device, and at least part of the housing is a housing component of the terminal device.

[0029] The present invention further provides a terminal device, including a housing component and the above-mentioned sounding device. The sounding device is arranged in the housing component. The housing component is provided with a sound hole for the sound radiation of the sounding device and a through hole communicating with the ventilation cavity.

[0030] The sound - generating device of the technical solution of the present invention is provided with an installation cavity inside the housing, thereby facilitating the installation, fixation, and protection of the sound - generating monomer by using the installation cavity, so as to achieve the sound - generating effect by using the sound - generating monomer; meanwhile, by providing a ventilation cavity on the housing, both ends of the ventilation cavity penetrate through the opposite sides of the housing and are spaced from the installation cavity, and the ventilation cavity is located at the center of the installation cavity, thereby avoiding the interference between the sound airflow in the ventilation cavity and the sound - generating airflow generated by the sound - generating monomer in the installation cavity, and at the same time, problems such as feedback delay, distortion, and occasional whistling can be avoided; meanwhile, by providing a plugging member, the plugging member is movably connected to the housing and is detachably arranged in the ventilation cavity to block or open the ventilation cavity, so that the sound - generating device has a sound quality mode in which the ventilation cavity is blocked by the plugging member and a transparent mode in which the ventilation cavity is opened by the plugging member, so as to realize the conversion of the sound - generating device between the transparent mode and the sound quality mode by using the plugging member, thereby effectively improving the low - frequency performance, and the leakage amount can be adjusted by adjusting the position of the plugging member. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following - described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0032] Figure 1 It is a schematic structural diagram of the sound - generating device in an embodiment of the present invention;

[0033] Figure 2 It is an exploded structural diagram of the sound - generating device in an embodiment of the present invention;

[0034] Figure 3 It is a sectional exploded view of the sound - generating device in an embodiment of the present invention;

[0035] Figure 4 It is a sectional view of the sound - generating device in the sound quality mode in an embodiment of the present invention;

[0036] Figure 5 It is a sectional view of the sound - generating device in the transparent mode in an embodiment of the present invention.

[0037] Explanation of the reference numerals in the drawings:

[0038] Reference numeral Name Reference numeral Name 100 Sound generating device 142 Second mounting groove 1 Housing 143 Outer side wall 11 Mounting cavity 144 Bottom wall 12 Ventilation cavity 145 Inner side wall 13 First housing 1451 Vertical section 131 First through cavity 1452 Straight section 132 First mounting groove 1453 Step surface 133 Outer fixing section 146 Leakage groove 134 Top wall section 2 Sound generating element 135 Central connection section 21 Diaphragm 136 Sound outlet hole 3 Sealing member 14 Second housing 31 Blocking edge 141 Second through cavity 4 Air leakage channel

[0039] The realization of the object of the present invention, functional features, and advantages will be further described in conjunction with the embodiments and with reference to the drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0041] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] At the same time, the meaning of "and / or" or "and / or" that appears throughout the text is that it includes three solutions. Taking "A and / or B" as an example, it includes the A solution, or the B solution, or the solution where A and B are satisfied simultaneously.

[0043] In addition, the descriptions such as "first" and "second" in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0044] With the rapid development of the consumer electronics industry, especially TWS earphones, the demand of end consumers for the usage experience of devices is getting higher and higher. In addition to the basic sound quality requirements, the user experiences such as supporting comfort and safety are further increased.

[0045] In this context, each earphone manufacturer has put forward higher performance requirements for earphone functions / user experiences. In the related art, in order to improve the user's perception of external sounds after wearing earphones, the prior art generally adopts two methods. One is to use a Mic to pick up external sounds and replay them with an earphone speaker. This method has problems such as high feedback delay, high distortion, and occasional whistling. The other is to open a hole in the center of the earphone and directly conduct with the outside through a physical structure. This method has problems such as excessive low-frequency loss and the inability to turn off the transparent mode.

[0046] Based on the above concepts and problems, the present invention proposes a sound generating device 100. It can be understood that the sound generating device 100 can be applied to terminal devices, especially wireless earphones, such as TWS earphones, etc., which are not limited herein.

[0047] Please refer to Figures 1 to 5 As shown in Figures 1 to 5 , in the embodiment of the present invention, the sound generating device 100 includes a housing 1, a sound generating element 2, and a plugging member 3. Among them, an installation cavity 11 is provided inside the housing 1, and the housing 1 is further provided with a ventilation cavity 12 spaced apart from the installation cavity 11. Both ends of the ventilation cavity 12 penetrate through opposite sides of the housing 1, and the ventilation cavity 12 is located at the center of the installation cavity 11. The sound generating element 2 is disposed in the installation cavity 11, and the plugging member 3 is movably connected to the housing 1 and is movably disposed in the ventilation cavity 12 to plug or open the ventilation cavity 12.

[0048] In this embodiment, the housing 1 of the sound generating device 100 is used to install, fix, and protect components such as the sound generating element 2 and the plugging member 3. That is, the housing 1 provides an installation basis for components such as the sound generating element 2 and the plugging member 3. It can be understood that the housing 1 can be a structure such as a housing or a chassis having an installation cavity 11.

[0049] Of course, the housing 1 can also be a part of the terminal device, such as a housing assembly and other structures. Or, the housing 1 is connected to the housing assembly as a whole to realize the installation and fixation of the sound generating device 100 in the terminal device, which is not limited herein. Optionally, the housing 1 can be selected as a plastic housing, that is, injection molded with a plastic material, which is not limited herein.

[0050] In this embodiment, the sound generating element 2 can be a speaker element. The sound generating element 2 includes a housing and a vibration system and a magnetic circuit system received in the housing. The sound generating element 2 is connected to the housing 1 through the housing. It can be understood that the magnetic circuit system is provided with a magnetic gap, and the vibration system includes a diaphragm 21 and a voice coil connected to the diaphragm 21. The voice coil is suspended in the magnetic gap. Thus, when an electric current is passed through the voice coil, the voice coil introduces the electric current into the magnetic gap, and in the magnetic field formed by the magnetic circuit system, the diaphragm 21 is driven to vibrate to generate sound.

[0051] In this embodiment, in order to facilitate the sound generated by the vibration of the diaphragm 21 of the sound generating element 2 to be transmitted out of the housing 1, the housing 1 is provided with a sound outlet hole 136. Optionally, the installation cavity 11 of the housing 1 is a sealed cavity, and the sound outlet hole 136 penetrates through the housing 1 and communicates with the installation cavity 11, that is, the installation cavity 11 communicates with the outside through the sound outlet hole 136. It can be understood that the housing of the sound generating element 2 is disposed in the installation cavity 11, the diaphragm 21 of the vibration system is fixed to the housing, and cooperates with the housing to divide the installation cavity 11 of the housing 1 into a front sound cavity and a rear sound cavity, and the sound outlet hole 136 communicates with the front sound cavity.

[0052] It can be understood that the magnetic circuit system includes a magnetic yoke and a magnet assembly disposed on the magnetic yoke, and a magnetic gap is formed between the magnet assembly and the magnetic yoke. In order to achieve the air pressure balance between the front sound cavity and the rear sound cavity, the housing or the magnetic yoke of the magnetic circuit system is provided with an air leakage hole communicating with the rear sound cavity, which is not limited herein.

[0053] In this embodiment, by providing a ventilation cavity 12 on the housing 1, the ventilation cavity 12 is spaced from the installation cavity 11, and a blocking member 3 is provided such that the blocking member 3 is movably connected to the housing 1 and detachably disposed in the ventilation cavity 12 to block or open the ventilation cavity 12. Thus, the sound generating device 100 has a sound quality mode in which the ventilation cavity 12 is blocked by the blocking member 3 and a transparent mode in which the ventilation cavity 12 is opened by the blocking member 3, so as to utilize the blocking member 3 to realize the conversion of the sound generating device 100 between the transparent mode and the sound quality mode, thereby effectively improving the low-frequency performance, and the leakage amount can be adjusted by adjusting the position of the blocking member 3.

[0054] It can be understood that the ventilation cavity 12 is provided as a through cavity, that is, both ends of the ventilation cavity 12 penetrate through the opposite surfaces of the housing 1 and are spaced from the installation cavity 11. The ventilation cavity 12 and the installation cavity 11 are located on both sides of the cavity wall, that is, the cavity wall of the ventilation cavity 12 and the cavity wall of the installation cavity 11 can share one, without further limitation. Optionally, the installation cavity 11 is an annular cavity, and the annular installation cavity 11 surrounds the ventilation cavity 12, that is, the ventilation cavity 12 is located in the center of the installation cavity 11. In this embodiment, the ventilation cavity 12 is provided in the middle of the housing 1.

[0055] In this embodiment, the blocking member 3 and the housing 1 can adopt a movable connection method, such as a snap connection, a plug-in fit, a screw connection, a pin connection or a threaded connection and other detachable connection methods, so that the blocking member 3 is detachably disposed in the ventilation cavity 12. Of course, the blocking member 3 and the housing 1 can also be connected by a sliding connection or an elastic snap connection method, that is, the blocking member 3 and the housing 1 are not completely separated, as long as both ends of the ventilation cavity 12 are communicated with the outside, which is not limited herein.

[0056] The sound generating device 100 of the present invention is provided with an installation cavity 11 in the housing 1, so as to facilitate the installation, fixation and protection of the sound generating element 2 by using the installation cavity 11, and utilize the sound generating element 2 to achieve the sound generating effect; at the same time, by providing a ventilation cavity 12 on the housing 1, the ventilation cavity 12 is spaced from the installation cavity 11, so as to avoid the interference between the sound airflow in the ventilation cavity 12 and the sound airflow generated by the sound generating element 2 in the installation cavity 11, and at the same time, problems such as feedback delay, distortion, and occasional whistling can be avoided; at the same time, by providing a blocking member 3, the blocking member 3 is movably connected to the housing 1, and the blocking member 3 is detachably disposed in the ventilation cavity 12 to block or open the ventilation cavity 12, so that the sound generating device 100 has a sound quality mode in which the ventilation cavity 12 is blocked by the blocking member 3 and a transparent mode in which the ventilation cavity 12 is opened by the blocking member 3, so as to utilize the blocking member 3 to realize the conversion of the sound generating device 100 between the transparent mode and the sound quality mode, thereby effectively improving the low-frequency performance, and the leakage amount can be adjusted by adjusting the position of the blocking member 3.

[0057] In one embodiment, an air leakage channel 4 is formed by enclosing the outer wall of the plugging member 3 and the inner wall of the ventilation cavity 12, and the plugging member 3 is provided with a stop portion for plugging the air leakage channel 4.

[0058] In this embodiment, as Figure 4 shown, by using the outer wall of the plugging member 3 and the inner wall of the ventilation cavity 12 to enclose the air leakage channel 4, and setting a stop portion on the plugging member 3, the stop portion is used to open or plug the air leakage channel 4, so as to realize the conversion of the sound generating device 100 between the sound quality mode and the transparent mode; at the same time, by adjusting the air leakage area of the stop portion to open or plug the air leakage channel 4, the air leakage amount can be adjusted, so as to be adjusted according to different needs of users and improve the user experience.

[0059] It can be understood that the inner wall of the ventilation cavity 12 is provided with a groove or a convex structure, or a groove or a convex structure is provided on the outer wall of the plugging member 3. In this way, when the plugging member 3 is located in the ventilation cavity 12, the outer wall of the plugging member 3 and the groove or convex structure on the inner wall of the ventilation cavity 12 enclose the air leakage channel 4, or the inner wall of the ventilation cavity 12 and the groove or convex structure on the outer wall of the plugging member 3 enclose the air leakage channel 4. At the same time, a stop portion is provided on the plugging member 3 corresponding to the air leakage channel 4, so as to use the stop portion to cover or open the opening at one end of the air leakage channel 4, so as to realize the communication between the two ends of the ventilation cavity 12 and the outside through the air leakage channel 4.

[0060] Optionally, the air leakage channel 4 may include one or more, and one or more air leakage channels 4 may be arranged to extend along the axial direction of the ventilation cavity 12. Of course, in other embodiments, the air leakage channel 4 may also be arranged in an arc or a spiral structure, which is not limited here.

[0061] In one embodiment, the ratio of the cross-sectional area of the air leakage channel 4 to the cross-sectional area of the ventilation cavity 12 is greater than or equal to 1:4. It can be understood that by controlling the ratio of the cross-sectional area of the air leakage channel 4 to the cross-sectional area of the ventilation cavity 12 to be greater than or equal to 1:4, the auditory effect of the sound generating device 100 in the transparent mode can be ensured.

[0062] It can be understood that taking the plane passing through the center of the ventilation cavity 12 and perpendicular to the axial direction of the ventilation cavity 12 as the cross-section, the area ratio of the air leakage channel 4 on this cross-section is greater than or equal to 25% of the area of the ventilation cavity 12 on this cross-section.

[0063] In one embodiment, the ventilation cavity 12 includes a first through cavity 131 and a second through cavity 141 that are connected and communicate with each other. The cross-sectional area of the second through cavity 141 is larger than that of the first through cavity 131, so that a step surface 1453 is formed at the connection between the second through cavity 141 and the first through cavity 131. The plugging member 3 is movably received in the second through cavity 141, so that the peripheral wall of the plugging member 3 and the cavity wall of the second through cavity 141 cooperate to form a gas leakage channel 4. The plugging member 3 abuts against and is limited by the step surface 1453, so that the gas leakage channel 4 communicates with or blocks the first through cavity 131.

[0064] In this embodiment, as Figures 2 to 5 shown, by setting the ventilation cavity 12 into two parts, namely the first through cavity 131 and the second through cavity 141, the cross-sectional area of the second through cavity 141 in the direction perpendicular to the axial direction of the ventilation cavity 12 is larger than the cross-sectional area of the first through cavity 131 in the direction perpendicular to the axial direction of the ventilation cavity 12, so that a step surface 1453 is formed at the connection between the second through cavity 141 and the first through cavity 131. In this way, the plugging member 3 is movably received in the second through cavity 141, so that the peripheral wall of the plugging member 3 and the cavity wall of the second through cavity 141 cooperate to form a gas leakage channel 4. At this time, by adjusting the position of the plugging member 3 in the second through cavity 141, the gas leakage channel 4 can be made to communicate with or block the first through cavity 131.

[0065] It can be understood that when the plugging member 3 abuts against and is limited by the step surface 1453, at this time the plugging member 3 completely blocks the first through cavity 131, that is, the gas leakage channel 4 does not communicate with the first through cavity 131, and the sound generating device 100 is in the sound quality mode; when the plugging member 3 moves away from the step surface 1453 so that the gas leakage channel 4 communicates with the first through cavity 131 through the gap between the plugging member 3 and the step surface 1453, the sound generating device 100 is in the transparent mode.

[0066] In this embodiment, by adjusting the position of the plugging member 3 in the second through cavity 141, the leakage amount of the gas leakage channel 4 communicating with the first through cavity 131 through the gap between the plugging member 3 and the step surface 1453 can be adjusted, so as to achieve according to the requirements of different users.

[0067] It can be understood that the inner wall of the second through cavity 141 is provided with a groove or a convex structure, or a groove or a convex structure is provided on the outer wall of the plugging member 3. In this way, when the plugging member 3 is located in the second through cavity 141, the outer wall of the plugging member 3 and the groove or convex structure on the inner wall of the second through cavity 141 enclose to form the gas leakage channel 4, or the groove or convex structure on the inner wall of the second through cavity 141 and the outer wall of the plugging member 3 enclose to form the gas leakage channel 4.

[0068] In this embodiment, the air leakage channel 4 may include one or more, and the one or more air leakage channels 4 may be arranged to extend along the axial direction of the second through cavity 141. Of course, in other embodiments, the air leakage channel 4 may also be arranged in an arc shape or a spiral structure, which is not limited herein. It can be understood that one end of the air leakage channel 4 adjacent to the step surface 1453 is located below the step surface 1453.

[0069] Of course, in other embodiments, the step surface 1453 may also be provided with a groove structure, which is not limited herein.

[0070] In one embodiment, a leakage groove 146 is provided on the inner wall of the second through cavity 141, and the plugging member 3 is movably received in the second through cavity 141 so that the peripheral wall of the plugging member 3 cooperates with the leakage groove 146 to form the air leakage channel 4; a retaining edge 31 protrudes from one end of the plugging member 3 away from the step surface 1453, and the retaining edge 31 forms a stopping portion to block or open one end of the leakage groove 146 away from the step surface 1453.

[0071] In this embodiment, as Figures 2 to 5 shown, the leakage groove 146 is formed by concaving the inner wall of the second through cavity 141, so that when the plugging member 3 is movably received in the second through cavity 141, the peripheral wall of the plugging member 3 cooperates with the leakage groove 146 to form the air leakage channel 4.

[0072] It can be understood that by protruding the retaining edge 31 from one end of the plugging member 3 away from the step surface 1453, the retaining edge 31 is arranged corresponding to the air leakage channel 4, so that the retaining edge 31 can be used to block or open one end of the leakage groove 146 away from the step surface 1453.

[0073] In this embodiment, when the plugging member 3 abuts against and is limited by the step surface 1453, the retaining edge 31 blocks one end of the leakage groove 146 away from the step surface 1453; when the plugging member 3 is away from the step surface 1453, the retaining edge 31 opens one end of the leakage groove 146 away from the step surface 1453.

[0074] Optionally, the distance from the side of the plugging member 3 facing the step surface 1453 to the retaining edge 31 along the axial direction of the second through cavity 141 is less than or equal to the distance from the step surface 1453 to one end of the second through cavity 141 away from the step surface 1453.

[0075] In one embodiment, the extending direction of the leakage groove 146 is the same as the extending direction of the ventilation cavity 12. It can be understood that the extending direction of the leakage groove 146 is arranged parallel to the axis of the ventilation cavity 12. Optionally, one end of the leakage groove 146 away from the step surface 1453 penetrates through the end surface of one end of the second through cavity 141 away from the step surface 1453. Of course, in other embodiments, the leakage groove 146 is arranged in a spiral shape along the cavity wall of the second through cavity 141. Or, the leakage groove 146 is arranged as an arc-shaped groove, which is not limited herein.

[0076] It can be understood that the retaining edge 31 is a boss structure protruding from the peripheral wall of the plugging member 3. Optionally, the retaining edge 31 is arranged corresponding to the leakage groove 146, and the area of the retaining edge 31 in the cross-section perpendicular to the axial direction of the second through cavity 141 is larger than the area of the leakage groove 146 in the cross-section perpendicular to the axial direction of the second through cavity 141.

[0077] Optionally, there are multiple leakage grooves 146, and the multiple leakage grooves 146 are arranged at intervals along the circumferential direction of the second through cavity 141. The retaining edge 31 extends along the peripheral edge of the plugging member 3 to form an annular boss.

[0078] In an embodiment, the housing 1 includes a first housing 13 and a second housing 14. Among them, the first housing 13 is provided with a first through cavity 131 and a first mounting groove 132 arranged around the first through cavity 131. The second housing 14 is provided with a second through cavity 141 and a second mounting groove 142 arranged around the second through cavity 141. The first housing 13 is connected to the second housing 14 so that the first through cavity 131 and the second through cavity 141 are correspondingly connected to form a ventilation cavity 12, and the first mounting groove 132 and the second mounting groove 142 enclose to form a mounting cavity 11.

[0079] In this embodiment, as Figures 1 to 5 shown, by setting the housing 1 into two parts of the first housing 13 and the second housing 14, it is convenient to disassemble and assemble the sounding element 2. It can be understood that the first housing 13 and the second housing 14 of the housing 1 can be fixedly connected, for example, connected into one body by welding, bonding, etc., so that the first mounting groove 132 and the second mounting groove 142 enclose to form a sealed mounting cavity 11. Of course, the first housing 13 and the second housing 14 of the housing 1 can also be connected into one body by snap connection, plug-in fit, screw connection or pin connection, so as to improve the disassembly and assembly convenience of the sounding element 2.

[0080] It can be understood that the first through cavity 131 is arranged at the middle position of the first housing 13, the first mounting groove 132 is arranged around the first through cavity 131, the second through cavity 141 is arranged at the middle position of the second housing 14, and the second mounting groove 142 is arranged around the second through cavity 141. Thus, when the first housing 13 is connected to the second housing 14, the first through cavity 131 and the second through cavity 141 are correspondingly connected to form a ventilation cavity 12. At this time, the mounting cavity 11 is an annular cavity and is arranged around the ventilation cavity 12.

[0081] In one embodiment, the first housing 13 includes a central connection section 135, a top wall section 134 disposed around the central connection section 135, and an outer fixing section 133 connected to the outside of the top wall section 134. The outer fixing section 133, the top wall section 134, and the central connection section 135 enclose a first mounting groove 132. The central connection section 135 is provided in a cylindrical shape and forms a first through cavity 131. The second housing 14 includes an inner side wall 145, a bottom wall 144 disposed around the inner side wall 145, and an outer side wall 143 connected to the outside of the bottom wall 144. The outer side wall 143, the bottom wall 144, and the inner side wall 145 enclose a second mounting groove 142. The inner side wall 145 includes a vertical section 1451 and a flat section 1452 connected to the bottom wall 144. The vertical section 1451 is provided in a cylindrical shape and forms a second through cavity 141. The flat section 1452 is connected to one end of the vertical section 1451 away from the bottom wall 144 and extends into the second through cavity 141. Wherein, the central connection section 135 is connected to the flat section 1452 so that a stepped surface 1453 is formed on the side of the flat section 1452 facing away from the central connection section 135, and the outer fixing section 133 is correspondingly connected to the outer side wall 143.

[0082] In this embodiment, the central connection section 135 of the first housing 13 is in a cylindrical structure with both ends open. The top wall section 134 is connected to the outside of the central connection section 135 and disposed around the central connection section 135. The inner side wall 145 of the second housing 14 is in a cylindrical structure with both ends open. The bottom wall 144 is connected to the outside of the inner side wall 145 and disposed around the inner side wall 145. It can be understood that when the central connection section 135 is connected to the inner side wall 145, the first through cavity 131 and the second through cavity 141 are correspondingly communicated.

[0083] It can be understood that the outer fixing section 133 is connected to the outside of the top wall section 134 and disposed around the top wall section 134, and the outer fixing section 133 extends toward the side of the top wall section 134 facing the second housing 14, so that the outer fixing section 133, the top wall section 134, and the central connection section 135 enclose a first mounting groove 132. The outer side wall 143 is connected to the outside of the bottom wall 144 and disposed around the bottom wall 144, and the outer side wall 143 extends toward the side of the bottom wall 144 facing the first housing 13, so that the outer side wall 143, the bottom wall 144, and the inner side wall 145 enclose a second mounting groove 142.

[0084] In this embodiment, the inner side wall 145 includes a vertical section 1451 and a flat section 1452. The vertical section 1451 is in a cylindrical structure with both ends open. The bottom wall 144 is connected to the outside of the vertical section 1451 and disposed around the vertical section 1451. The flat section 1452 is connected to one end of the vertical section 1451 away from the bottom wall 144 and extends into the second through cavity 141, so that the flat section 1452, the flat section 1452, and the bottom wall 144 are arranged in a Z shape.

[0085] It can be understood that by setting the straight section 1452, it is convenient to connect the central connection section 135 of the first housing 13 to the straight section 1452, increasing the connection area and improving stability. At the same time, the straight section 1452 is conducive to restricting the position of the plugging member 3 in the ventilation cavity 12. In this embodiment, the leakage groove 146 is recessed in the vertical section 1451, and the plugging member 3 can move along the vertical section 1451 so that one end of the leakage groove 146 adjacent to the step surface 1453 is exposed between the plugging member 3 and the step surface 1453, and the blocking edge 31 is away from the bottom wall 144, so that the first through cavity 131 is communicated with the outside through the leakage groove 146.

[0086] Optionally, the connection between the vertical section 1451 and the straight section 1452 is provided with a rounded corner or an oblique angle. It can be understood that the shape contour of the plugging member 3 is the same as the shape contour of the second through cavity 141.

[0087] In this embodiment, one side of the sounding element 2 is clamped between the central connection section 135 and the straight section 1452, and a fixing boss is provided on the other side of the sounding element 2, and the fixing boss is clamped between the outer side wall 143 and the outer fixing section 133.

[0088] In one embodiment, the diaphragm 21 of the sounding element 2 corresponds to the top wall section 134, and the top wall section 134 is provided with a convex arc shape. It can be understood that by setting the top wall section 134 to a convex arc shape, it is convenient to provide a vibration space for the vibration of the diaphragm 21.

[0089] In this embodiment, the top wall section 134 is provided with a sound outlet hole 136 communicating with the installation cavity 11. It can be understood that there are multiple sound outlet holes 136, and the multiple sound outlet holes 136 are arranged at intervals and surround the first through cavity 131.

[0090] In one embodiment, the plugging member 3 is threadedly connected to the cavity wall of the ventilation cavity 12. It can be understood that the outer wall of the plugging member 3 is provided with an external thread, the cavity wall of the ventilation cavity 12 is provided with an internal thread, and the plugging member 3 is threadedly connected to the cavity wall of the ventilation cavity 12 through the cooperation of the external thread and the internal thread. At this time, the leakage groove 146 penetrates through the internal thread.

[0091] In one embodiment, the plugging member 3 is movably connected to the housing 1 through an elastic snap structure. It can be understood that the elastic snap structure includes an elastic member and a snap member. One end of the elastic member is connected to the cavity wall of the ventilation cavity 12 of the housing 1, and the other end is connected to the plugging member 3. The snap member is arranged on the plugging member 3. Optionally, the elastic member is a spring. When the plugging member 3 is detachably connected to the bottom wall 144 of the second housing 14 of the housing 1 through the snap member, the plugging member 3 is accommodated in the second through cavity 141. At this time, the plugging member 3 compresses the elastic member. When the snap member is separated from the bottom wall 144, the elastic member pushes the plugging member 3 to move along the vertical section 1451 of the inner side wall 145.

[0092] Optionally, the elastic expansion and contraction amount of the elastic member is less than the length of the second through cavity 141 in its axial direction.

[0093] Of course, in other embodiments, the elastic snap structure can also be similar to a switch telescopic case. By pressing the plugging member 3, the plugging member 3 is moved along the vertical section 1451 of the inner side wall 145, so that the first through cavity 131 communicates with the outside through the leakage groove 146.

[0094] The sound generating device 100 of the present invention realizes the conversion between the transparent mode and the sound quality mode by providing a ventilation cavity 12 on the housing 1 and providing a plugging member 3, so that the plugging member 3 cooperates with the ventilation cavity 12. In the transparent mode, the sound generating device 100 can collect external sounds through the ventilation cavity 12. By using the plugging member 3 to close the transparent mode, when the sound generating device 100 is in the sound quality mode, the low frequency of the sound generating device 100 is increased by 8 dB to 10 dB.

[0095] It can be understood that when the user wants to hear external sounds, the ventilation cavity 12 is opened by using the plugging member 3, and the external sounds can enter the human ear through the leakage groove 146; when the user does not want the external sounds to enter the ear, the ventilation cavity 12 or the leakage groove 146 can be plugged by using the plugging member 3.

[0096] The sound generating device 100 of the present invention can be applied to a terminal device, such as a headset. At least part of the housing 1 of the sound generating device 100 is a housing component of the terminal device. For example, the outer housing of the headset and the housing 1 of the sound generating device 100 can be the same, or the outer housing of the headset and part of the housing 1 of the sound generating device 100 are of an integrally formed structure, which is not limited herein.

[0097] The present invention also provides a terminal device, which includes the above-mentioned sound generating device 100. The specific structure of the sound generating device 100 refers to the foregoing embodiments. Since this terminal device adopts all the technical solutions of the foregoing embodiments, it has at least all the beneficial effects brought by the technical solutions of the foregoing embodiments, which will not be elaborated herein one by one.

[0098] In this embodiment, the terminal device includes a housing component, the sound generating device 100 is arranged in the housing component, the housing component is provided with sound holes for the sound of the sound generating device 100 to radiate and through holes communicating with the ventilation cavity 12. Of course, in other embodiments, the housing component and the housing 1 of the sound generating device 100 are of an integral structure, which is not limited herein. It can be understood that the terminal device can be a wireless headset, such as a TWS headset.

[0099] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A sound generating device, characterized in that, The sound generating device includes: A housing, an installation cavity is provided inside the housing, and a ventilation cavity spaced from the installation cavity is also provided in the housing. Both ends of the ventilation cavity penetrate through opposite sides of the housing, and the ventilation cavity is located at the center of the installation cavity. The ventilation cavity includes a first through cavity and a second through cavity that are connected and communicate with each other. The cross-sectional area of the second through cavity is larger than that of the first through cavity, so that a stepped surface is formed at the connection between the second through cavity and the first through cavity; A sounding element, which is arranged in the installation cavity; and A plugging member, which is movably connected to the housing and is movably arranged in the ventilation cavity to plug or open the ventilation cavity. The plugging member is movably received in the second through cavity, so that a leakage channel is formed by the cooperation of the peripheral wall of the plugging member and the cavity wall of the second through cavity. The plugging member abuts against and is limited by the stepped surface, so that the leakage channel communicates with or is blocked from the first through cavity; Wherein, the housing includes a first housing and a second housing. The first housing includes a central connection section, a top wall section arranged around the central connection section, and an outer fixing section connected to the outside of the top wall section. The outer fixing section, the top wall section and the central connection section enclose to form the first installation groove. The central connection section forms the first through cavity. The second housing includes an inner side wall, a bottom wall arranged around the inner side wall, and an outer side wall connected to the outside of the bottom wall. The outer side wall, the bottom wall and the inner side wall enclose to form the second installation groove. The inner side wall forms the second through cavity. The first housing is connected to the second housing so that the first through cavity and the second through cavity correspond and communicate to form the ventilation cavity, and the first installation groove and the second installation groove enclose to form the installation cavity.

2. The sound generating device according to claim 1, wherein A leakage channel is formed by the enclosure of the outer wall of the plugging member and the inner wall of the ventilation cavity, and the plugging member is provided with a stop portion for plugging the leakage channel.

3. The sound generating device according to claim 2, wherein, The ratio of the cross-sectional area of the leakage channel to the cross-sectional area of the ventilation cavity is greater than or equal to 1:

4.

4. The sound generating device according to claim 2, wherein The inner wall of the second through cavity is provided with a leakage groove. The plugging member is movably received in the second through cavity, so that a leakage channel is formed by the cooperation of the peripheral wall of the plugging member and the leakage groove; One end of the plugging member away from the stepped surface is convexly provided with a retaining edge, and the retaining edge forms the stop portion to plug or open one end of the leakage groove away from the stepped surface.

5. The sound generating device according to claim 4, wherein, The extending direction of the leakage groove is the same as the extending direction of the ventilation cavity; or, the leakage groove is spirally arranged along the cavity wall of the second through cavity; And / or, the leakage groove includes a plurality of grooves, and the plurality of leakage grooves are arranged at intervals along the circumferential direction of the second through cavity, and the retaining edge extends along the periphery of the plugging member to form an annular boss.

6. The sound generating device according to claim 1, wherein The first installation groove is arranged around the first through cavity, and the second installation groove is arranged around the second through cavity.

7. The sound generating device according to claim 6, wherein The central connection section is arranged in a cylindrical shape; The inner side wall includes a vertical section and a straight section connected to the bottom wall. The vertical section is arranged in a cylindrical shape and forms the second through cavity. The straight section is connected to one end of the vertical section away from the bottom wall and extends towards the inside of the second through cavity; Wherein, the central connection section is connected to the straight section so that a stepped surface is formed on a side of the straight section facing away from the central connection section, and the outer fixing section is correspondingly connected to the outer side wall.

8. The sound generating device according to claim 7, wherein, The diaphragm of the sound generating unit corresponds to the top wall section, and the top wall section is arranged in a convex arc shape; And / or, the top wall section is provided with a sound outlet hole communicating with the installation cavity; And / or, the connection part between the vertical section and the straight section is arranged with a rounded corner or an oblique angle.

9. The sound generating device according to any one of claims 1 to 8, characterized in that, The plugging member is threadedly connected to the wall of the ventilation cavity; Or, the plugging member is movably connected to the housing through an elastic snap structure.

10. The sound generating device according to any one of claims 1 to 8, characterized in that, The sound generating device is applied to a terminal device, and at least part of the housing is a housing component of the terminal device.

11. A terminal device, characterized in that, It includes a housing component and the sound generating device according to any one of claims 1 to 10, the sound generating device is arranged in the housing component, and the housing component is provided with a sound hole for the sound of the sound generating device to radiate and a through hole communicating with the ventilation cavity.

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