earphone

Abstract

The embodiment of the application discloses an earphone, which comprises an ear shell, a loudspeaker assembly, a flexible cover and a driving device, the ear shell is provided with a ventilation hole; the loudspeaker assembly is arranged in the ear shell, the loudspeaker assembly cooperates with the ear shell to form a front chamber and a rear chamber, the front chamber and the rear chamber are communicated, the front chamber is communicated with the ventilation hole, the flexible cover is movably arranged in the ear shell, the flexible cover is movable relative to the ear shell to open or seal the ventilation hole, and the driving device is arranged in the rear chamber and connected with the flexible cover, so that the flexible cover is driven to open or seal the ventilation hole, and the noise reduction and ventilation requirements of a user are met.

Description

Technical Field

[0001] This application relates to the field of headphone technology, and more particularly to a type of headphone. Background Technology

[0002] In related technical fields, when users wear headphones, the headphones usually extend into the user's ear, which can easily lead to poor air circulation in the user's ear. Wearing them for a long time can make the user feel stuffy and hot in the ear, causing discomfort and reducing the user experience. Summary of the Invention

[0003] This application provides an earphone designed to meet users' needs for noise reduction and breathability.

[0004] This application provides an earphone, which includes an ear shell, a speaker assembly, a flexible cover, and a driving device. The ear shell has a vent hole. The speaker assembly is disposed inside the ear shell and cooperates with the ear shell to form a front chamber and a rear chamber. The front chamber and the rear chamber are connected, and the front chamber is connected to the vent hole. The flexible cover is movably installed on the ear shell and can move relative to the ear shell to open or seal the vent hole. The driving device is disposed in the rear chamber and connected to the flexible cover to drive the flexible cover to open or seal the vent hole.

[0005] The earphone based on this application features a vent on the earcup, connecting the front chamber to the vent. When active noise cancellation is needed, a flexible cover can be driven by a driver to seal the vent, keeping the front chamber sealed and providing good active noise cancellation. When active noise cancellation is not needed, the flexible cover can be driven by the driver to open the vent, allowing the front chamber to connect with the outside environment. This facilitates air exchange between the front chamber and the outside, reducing ear stuffiness and improving the user experience. Attached Figure Description

[0006] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0007] Figure 1 A partial cross-sectional view of an earphone provided in an embodiment of this application;

[0008] Figure 2 This is a right view of the headphones in one embodiment of this application;

[0009] Figure 3 for Figure 1Enlarged view of point A in the middle;

[0010] Figure 4 This is a schematic diagram of the structure of a driving device according to an embodiment of this application;

[0011] Figure 5 This is a schematic diagram of the structure of a driving device according to an embodiment of this application from another perspective;

[0012] Figure 6 A right view of an earphone provided in another embodiment of this application;

[0013] Figure 7 This is a schematic diagram of the structure of a driving device according to another embodiment of this application;

[0014] Figure 8 This is a schematic diagram of the structure of a driving device according to another embodiment of this application.

[0015] Explanation of reference numerals in the attached figures:

[0016] 1. Earphone; 2. Headband; 3. Earphone unit; 10. Ear shell; 11. Vent hole; 12. Shell body; 121. First guide groove; 1211. First limiting groove; 13. Back cover; 131. Second guide groove; 1311. Second limiting groove; 14. Tuning hole; 20. Speaker assembly; 21. Speaker bracket; 211. Connecting hole; 22. Speaker driver; 23. Sealing cover; 20a. Pressure relief hole; 30. Ear tips; 30a. Cover Cavity; 40, Flexible cover; 41, First guide part; 411, First limiting part; 42, Second guide part; 421, Second limiting part; 50, Driving device; 51, Driving piezoelectric sheet; 52, Transmission rod; 53, Piezoelectric clamping assembly; 531, Transmission component; 532, Clamping piezoelectric sheet; 533, Clamping component; 60, Tuning damping; 1a, Rear chamber; 1b, Front chamber; 1c, Receiving cavity; 11c, Front sound cavity; 12c, Rear sound cavity. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0018] Headphones are increasingly popular due to their comfortable fit and excellent performance. As people's demands rise, they also require more advanced headphone features.

[0019] In related technologies, when users wear headphones, the earcups are usually placed over the user's ears, which can easily lead to poor air circulation in the user's ears. Wearing them for a long time can make users feel stuffy and hot in their ears, causing discomfort and reducing the user experience.

[0020] In view of this, please refer to Figure 1 This application provides an earphone 1, which can be a headphone or an earphone, without any specific limitation.

[0021] Taking a pair of headphones as an example, headphones 1 include a headband 2 and two headphone units 3.

[0022] The headband 2 can use a stretchable memory alloy frame, with a breathable silicone padding layer wrapped around the outer layer of the memory alloy frame. The length of the memory alloy frame is adjustable to fit different head sizes, thereby improving the user's wearing comfort.

[0023] Two earphone units 3 are respectively connected to both ends of the headband 2, and the connection methods include fixed connection and rotatable connection. For example, the earphone unit 3 is rotatably connected to the end of the headband 2. Specifically, the earphone unit 3 and the headband 2 can be connected by a universal joint, so that the earphone unit 3 can rotate relative to the headband 2 to ensure that the user's auricle can fit the earphone unit 3, thereby improving the user's listening experience.

[0024] Taking in-ear headphones as an example, the headphones 1 include two headphone units 3. The headphone units 3 can be worn by hanging them on the outside of the ears, or by using the support part to cooperate with the concha cavity. No specific limitation is made here.

[0025] Please see Figure 2 and Figure 3 The headphone unit 3 includes an ear shell 10, a speaker assembly 20, a flexible cover 40, and a driver 50.

[0026] The earpiece 10 has ventilation holes 11, and the earpiece 10 can be made of metal or plastic. For example, when the earpiece 10 is made of plastic, it can be integrally molded using injection molding to improve the overall structural strength of the earpiece 10, thereby reducing the probability of damage. This allows the earpiece 10 to better protect the speaker assembly 20, reducing the probability of damage and extending its service life, thus extending the service life of the earphone 1. Furthermore, because the earpiece 10 is made of plastic, it is lightweight, resulting in a lighter overall weight of the earphone 1. This reduces the weight exerted on the user's head when wearing the earphone 1, reducing neck strain and improving the user's wearing experience.

[0027] Please see Figure 3The speaker assembly 20 is disposed inside the ear shell 10. The speaker assembly 20 and the ear shell 10 cooperate to form a front chamber 1b and a rear chamber 1a. The front chamber 1b is connected to the rear chamber 1a, and the vent hole 11 is connected to the rear chamber 1a, so that the front chamber 1b is connected to the vent hole 11. The front chamber 1b can be connected to the rear chamber 1a through the connecting hole 211 provided on the speaker bracket 21. The front chamber 1b can also be connected to the rear chamber 1a through the connecting hole 211 provided on the ear shell 10. No specific limitation is made here.

[0028] The speaker assembly 20 includes a speaker bracket 21 and a speaker driver 22. The speaker driver 22 is disposed on the speaker bracket 21, which is located inside the ear shell 10 and cooperates with the ear shell 10 to form a rear chamber 1a located on the rear side of the speaker bracket 21. The rear chamber 1a communicates with a vent 11. The speaker bracket 21 is provided with a communication hole 211 communicating with the rear chamber 1a. A receiving cavity 1c is provided on the side of the speaker bracket 21 facing away from the front chamber 1b. The speaker driver 22 is disposed in the receiving cavity 1c and divides the receiving cavity 1c into a front sound cavity 11c and a rear sound cavity 12c. The front sound cavity 11c communicates with the front chamber 1b. The sound emitted by the speaker driver 22 enters the front chamber 1b through the front sound cavity 11c and then propagates outward. The speaker driver 22 can be a moving coil type, a balanced armature type, a planar diaphragm type, etc., and no specific limitation is made here.

[0029] The rear acoustic chamber 12c is primarily used to improve the low-frequency performance of the headphones. When the speaker driver 22 vibrates and produces sound, the rear acoustic chamber 12c provides a buffer space for the air behind the speaker driver 22, allowing low-frequency sounds to be properly reflected and resonated within this space, thereby enhancing the strength and fullness of the low frequencies, making the bass deeper and more powerful. The rear acoustic chamber 12c helps balance the sound performance across the entire audio range. It can adjust the air pressure difference before and after the speaker driver 22, reducing sound distortion and coloration, allowing mid-high frequency and low-frequency sounds to blend more harmoniously, providing a more natural and balanced sound quality.

[0030] When the earphone 1 is a headphone, it also includes an ear tip 30, which is connected to the speaker bracket 21 and has a cover cavity 30a. The cover cavity 30a communicates with the front chamber 1b. When the user wears the earphone 1, the user's ear is housed within the cover cavity 30a. The speaker assembly 20 has a connecting hole 211, which communicates with the cover cavity 30a, allowing the front chamber 1b to communicate with the vent 11. Specifically, outside air enters the front chamber 1b sequentially through the vent 11, the rear chamber 1a, the connecting hole 211, and the cover cavity 30a. This design, with the ear tip 30 covering the user's ear, improves wearing comfort and provides noise reduction, enhancing the user's wearing experience.

[0031] There are several ways to connect the earcup 30 to the speaker bracket 21. For example, the earcup 30 can be connected to the speaker bracket 21 by at least one of screwing, snap-fitting, and adhesive bonding. The earcup 30 can be connected to the ear shell 10 by screws, abutment, or magnetic attraction. The earcup 30 can also be detached from the ear shell 10. The earcup 30 can be a multi-layer composite structure. For example, the earcup 30 can be a three-layer composite structure: the outer layer is an antibacterial protein leather coated with a nano-titanium dioxide photocatalytic coating; the middle layer is high-density memory foam; and the inner layer is medical-grade breathable mesh fabric.

[0032] When the earphone 1 is an in-ear type, it also includes an ear cap connected to the speaker bracket 21 and having a sound outlet channel that communicates with the front chamber 1b. When the user wears the earphone 1, the ear cap extends into the ear canal and abuts against it. The speaker assembly 20 has a connecting hole 211 that communicates with the sound outlet channel, allowing the front chamber 1b to connect with the vent 11. This design, with the ear cap abutting against the ear canal opening, improves wearing comfort and provides noise reduction, enhancing the user's wearing experience.

[0033] Please see Figure 3 In some embodiments, one end of the sealing cap 213 is sealed to the surface of the speaker bracket 21 away from the front chamber 1b, and the other end of the sealing cap 213 is sealed to the inner wall surface of the ear shell 10. The ear shell 10, the sealing cap 213 and the speaker bracket 21 surround and form a receiving cavity 1c.

[0034] Please see Figure 3 The speaker driver 22 may be provided with a pressure relief hole 20a connecting the front sound cavity 11c and the rear sound cavity 12c, so that the speaker driver 22 can relieve pressure in the rear sound cavity 12c during operation. The speaker driver 22 will vibrate during operation, and the air pressure inside the rear sound cavity 12c will change continuously. The pressure relief hole 20a can effectively regulate the air pressure in the rear sound cavity 12c, so that the air pressure in the rear sound cavity 12c is maintained at a relatively stable level, thereby helping to maintain the normal working condition of the speaker driver 22 and preventing sound distortion or quality degradation caused by air pressure imbalance in the rear sound cavity 12c.

[0035] Please see Figure 3 In some embodiments, the earpiece 10 is further provided with a tuning hole 14, which is connected to the rear acoustic cavity. The earphone 1 also includes a tuning damper 60, which is installed in the tuning hole 14. With this configuration, the airflow resistance of the tuning hole 14 can be adjusted by the tuning damper 60, thereby adjusting the acoustic performance of the speaker assembly 20 and improving the user experience.

[0036] Please see Figure 3The flexible cover 40 is movably mounted on the ear shell 10. The flexible cover 40 can be located on the outside or inside of the ear shell 10, without specific limitations. The flexible cover 40 can rotate relative to the ear shell 10, or it can slide relative to the ear shell 10, without specific limitations.

[0037] Please see Figure 3 The drive device 50 is located in the rear chamber 1a and is connected to the flexible cover 40 for driving the flexible cover 40 to open or seal the vent hole 11. The drive device 50 can be a motor drive device, a piezoelectric drive device, or a cylinder drive device, and no specific limitation is made here.

[0038] Please see Figure 2 The flexible cover 40 can be made of elastic and stretchable fabric, film, silicone film or plastic sheet, etc. The driving device 50 stretches the flexible cover 40 to deform the flexible cover 40 and seal the vent 11. At this time, the driving device 50 retracts the flexible cover 40 to restore its elasticity and open the vent 11. The flexible cover 40 can also be made of stackable fabric, foldable wrinkle sheet or other materials. The driving device 50 drives the flexible cover 40 to unfold so that the flexible cover 40 seals the vent 11. At this time, the driving device 50 drives the flexible cover 40 to fold or stack so that the flexible cover 40 opens the vent 11. The following are not listed in detail here.

[0039] Users can control the drive device 50 through mobile devices (such as mobile phones, remote controls, etc.), or through buttons, knobs or touch screens on the headphones 1, without any specific limitations.

[0040] The earphone 1 of this application has a vent 11 on the ear shell 10, and the front chamber 1b is connected to the vent 11. When the user needs active noise cancellation, the flexible cover 40 can be driven by the driving device 50 to seal the vent 11, so that the front chamber 1b is in a sealed state, thereby providing the user with a good active noise cancellation effect. When the user does not need to use active noise cancellation, the flexible cover 40 can be driven by the driving device 50 to open the vent 11, so that the front chamber 1b can be connected to the outside through the vent 11, which helps the air in the front chamber 1b to exchange with the outside air, thereby helping to reduce the stuffiness of the user's ears and thus improving the user experience.

[0041] In some embodiments, the vent 11 extends circumferentially along the ear shell 10, thereby making full use of the circumferential space of the ear shell 10 and allowing outside air to enter the anterior chamber 1b more effectively through the vent 11. The vent 11 can be an annular hole or a strip hole, without specific limitation. The flexible cover 40 can move axially along the ear shell 10 or circumferentially along the ear shell 10, without specific limitation.

[0042] Considering that the circumferential length of the flexible cover 40 in the ear shell 10 is greater than its axial length in the ear shell 10, if the driving device 50 drives the flexible cover 40 to move axially along the ear shell 10, the two ends of the flexible cover 40 in the circumferential direction of the ear shell 10 may become too far apart from the driving device 50, making it difficult for the driving device 50 to extend or retract the flexible cover 40. Therefore, the flexible cover 40 extends or retracts circumferentially relative to the ear shell 10 to open or seal the vent hole 11. With this arrangement, the driving device 50 can more easily drive the flexible cover 40 to extend or retract.

[0043] It should be noted that the flexible cover 40 can be unidirectionally telescopic, extending from one end in the circumferential direction toward or away from the other end. The flexible cover 40 can also be bidirectionally telescopic, with both ends in the circumferential direction extending toward or away from each other. No specific limitation is made here.

[0044] In some embodiments, the ear shell 10 is guided to the flexible cover 40 so that the flexible cover 40 moves circumferentially. The motor drive device 50 includes a motor and a transmission gear. The rotation axis of the transmission gear is collinear with the rotation axis of the flexible cover 40. The inner side of the flexible cover 40 is provided with internal teeth that mesh with the transmission gear. The motor drives the transmission gear to rotate, and the transmission gear drives the flexible cover 40 to extend and retract by meshing with the internal teeth.

[0045] In some embodiments, the ear shell 10 is guided to the flexible cover 40 so that the flexible cover 40 moves circumferentially. The cylinder drive device 50 includes a cylinder and two cranks. The cranks are rotatably mounted in the ear shell 10. One end of each of the two cranks is connected to the piston rod of the cylinder. The other ends of the two cranks are respectively hinged to the two ends of the flexible cover 40 in the circumferential direction. The cylinder drives the cranks to rotate, and the cranks drive the two ends of the flexible cover 40 in the circumferential direction to move in a direction that is closer to or further away from each other in the circumferential direction.

[0046] Please see Figure 3In some embodiments, the ear shell 10 includes a shell body 12 and a rear cover 13, with a speaker assembly 20 mounted on the shell body 12. The rear cover 13 is mounted on the shell body 12 via a flexible cover 40. A vent 11 is formed between the rear cover 13 and the shell body 12, and the speaker assembly 20 and the shell body 12 cooperate to form a front chamber 1b. The rear cover 13, the shell body 12, and the speaker assembly 20 cooperate to form a rear chamber 1a. It is understood that the vent 11 is separated by the shell body 12 and the rear cover 13, and the flexible cover 40 is located between the rear cover 13 and the shell body 12.

[0047] This design eliminates the need to process the shell body 12 or the back cover 13 to form the ventilation holes 11, thereby reducing the cost of the earphone 1. It also allows for better gas exchange between the air in the front chamber 1b and the outside, further reducing the stuffiness in the user's ears and improving the user experience. Meanwhile, the back cover 13, which is installed on the shell body 12 via the flexible cover 40, reduces the assembly steps of the earphone 1 and improves the production efficiency of the earphone 1.

[0048] Optionally, the flexible cover 40 includes a rigid support and a flexible element. The rigid support connects the shell body 12 and the rear cover 13. The flexible element is movably mounted on the rigid support, the rear cover 13, and the shell body 12. The flexible element can move from one end of the rigid support to the other end of the rigid support around the annular transmission rod 52 to seal the vent 11. With this configuration, connecting the shell body 12 and the rear cover 13 via the rigid support can prevent misalignment between the shell body 12 and the rear cover 13.

[0049] Optionally, the flexible cover 40 includes two rigid supports and a flexible element. The two rigid supports are respectively installed at both ends of the flexible element in the extension direction of the transmission rod 52. Both rigid supports are slidably installed on the shell body 12 and the rear cover 13, or one rigid support is slidably installed on the shell body 12 and the rear cover 13, and the other rigid support is slidably fixedly installed on the shell body 12 and the rear cover 13.

[0050] Please see Figure 3 In some embodiments, the shell body 12 is provided with a first guide groove 121, and the flexible cover 40 is provided with a first guide portion 41 at one end near the shell body 12, the first guide portion slidingly engaging with the first guide groove 121; the rear cover 13 is provided with a second guide groove 131, and the flexible cover 40 is provided with a second guide portion 42 at one end near the rear cover 13, the second guide portion 42 slidingly engaging with the second guide groove 131. This arrangement ensures that the flexible cover 40 can only move along the extension direction of the transmission rod 52, thereby allowing the piezoelectric sheet 51, transmission rod 52, and piezoelectric clamping assembly 53 to better control the extension and retraction of the flexible cover 40.

[0051] Please see Figure 3In some embodiments, the cross-sectional shape of the first guide portion 41 is T-shaped, and the cross-sectional shape of the first guide groove 121 is adapted to the cross-sectional shape of the first guide portion 41, that is, the cross-sectional shape of the first guide groove 121 is T-shaped. With this setting, the first guide portion 41 can be limited in the radial direction of the ear shell, thereby preventing the first guide portion 41 from disengaging from the first guide groove 121 during rotation.

[0052] It should be noted that the cross-sectional shape of the first guide portion 41 can also be trapezoidal, in which case the first guide groove 121 is a dovetail groove. The first guide portion 41 can also be other shapes, as long as the width of the end of the first guide portion 41 that extends into the first guide groove 121 is greater than the width of the end of the first guide portion 41 that is located outside the first guide groove 121. No specific limitation is made here.

[0053] In some embodiments, the cross-sectional shape of the second guide portion 42 is T-shaped, and the cross-sectional shape of the second guide groove 131 is adapted to the cross-sectional shape of the second guide portion 42, that is, the cross-sectional shape of the second guide groove 131 is T-shaped. With this configuration, the second guide portion 42 can be limited in the radial direction of the ear shell, thereby preventing the second guide portion 42 from disengaging from the second guide groove 131 during rotation.

[0054] It should be noted that the cross-sectional shape of the second guide part 42 can also be trapezoidal, in which case the second guide groove 131 is a dovetail groove. The second guide part 42 can also be other shapes, as long as the width of the two ends of the second guide part 42 extending into the second guide groove 131 is greater than the width of the two ends of the second guide part 42 located outside the second guide groove 131. No specific limitation is made here.

[0055] Please see Figure 4 as well as Figure 5 The driving device 50 may include a driving piezoelectric sheet 51, a transmission rod 52, and an elastic clamping member 533. The driving piezoelectric sheet 51 drives the transmission rod 52 to vibrate. The elastic clamping member 533 cooperates with the piezoelectric rod to drive the flexible cover 40 to extend and retract. For ease of understanding, taking the leftward movement of the flexible cover 40 as an example, firstly, the driving piezoelectric sheet 51 drives the transmission rod 52 to move to the left, and the transmission rod 52 drives the elastic clamping member 533 to move to the left. Then, the driving piezoelectric sheet 51 drives the transmission rod 52 to move to the right. At this time, the acceleration of the transmission rod 52 moving to the right is greater than the acceleration of the transmission rod 52 moving to the left, so that the elastic clamping member 533 remains in its original position or retracts a small distance. This reciprocating motion realizes that the elastic clamping member 533 drives the flexible cover 40 to move to the left. When the flexible cover 40 needs to move to the right, it is only necessary to make the acceleration of the transmission rod 52 moving to the right less than the acceleration of the transmission rod 52 moving to the left. It should be noted that the acceleration of the transmission rod 52 is related to the waveform of the driving piezoelectric sheet 51.

[0056] The driving piezoelectric sheet 51 drives the flexible cover 40 to expand and contract through the inverse piezoelectric effect of the piezoelectric material, so that the driving device 50 will vibrate during operation, thereby promoting the flow of air in the rear chamber 1a, and thus accelerating the heat dissipation efficiency of the earphone 1.

[0057] The driving device 50 may also include a driving piezoelectric sheet 51, a transmission rod 52, and a piezoelectric clamping assembly 53. The driving piezoelectric sheet 51 drives the transmission rod 52 to vibrate, and the piezoelectric clamping assembly 53 cooperates with the transmission rod 52 to drive the flexible cover 40 to extend and retract. For ease of understanding, taking the leftward movement of the flexible cover 40 as an example, firstly, the driving piezoelectric sheet 51 drives the transmission rod 52 to move to the left, and the piezoelectric clamping assembly 53 clamps the transmission rod 52 so that the transmission rod 52 drives the piezoelectric clamping assembly 53 to move to the left. Then, the driving piezoelectric sheet 51 drives the transmission rod 52 to move to the right, and the piezoelectric clamping assembly 53 releases its clamp on the transmission rod 52 so that the piezoelectric clamping assembly 53 remains in its original position. This reciprocating motion realizes that the driving device 50 drives the flexible cover 40 to move to the left.

[0058] Preferably, please refer to Figure 5 The driving device 50 includes a driving piezoelectric sheet 51, a transmission rod 52, and a piezoelectric clamping assembly 53. The driving piezoelectric sheet 51 is installed in the rear chamber 1a; the transmission rod 52 is drivenly connected to the driving piezoelectric sheet 51; the piezoelectric clamping assembly 53 is drivenly connected to the transmission rod 52 and the flexible cover 40, so that the piezoelectric clamping assembly 53 cooperates with the driving piezoelectric sheet 51 and the transmission rod 52 to drive the flexible cover 40 to open or seal the vent hole 11. With this configuration, the piezoelectric clamping assembly 53 can selectively clamp the transmission rod 52, thereby enabling the piezoelectric clamping assembly 53 to more accurately drive the flexible cover 40 to extend and retract.

[0059] Please see Figure 2 In some embodiments, the transmission rod 52 is arranged in a ring and is connected to the driving piezoelectric plate 51. Multiple piezoelectric clamping components 53 are arranged along the extension direction of the transmission rod 52. This arrangement allows the flexible cover 40 to extend and retract via the multiple piezoelectric clamping components 53, resulting in more uniform deformation or unfolding of the flexible cover 40. Simultaneously, when the flexible cover 40 closes the vent hole 11, the multiple piezoelectric clamping components 53 can fix the flexible cover 40 at multiple points, ensuring a stable seal of the vent hole 11.

[0060] In some implementations, the flexible cover 40 extends and retracts at both ends in the circumferential direction, moving closer to or further apart from each other. Two piezoelectric clamping components 53 are used, each positioned at one end of the flexible cover 40 in the circumferential direction. Specifically, taking the closure of the vent hole 11 by the flexible cover 40 as an example, firstly, the piezoelectric plate 51 is driven to rotate the transmission rod 52 clockwise. The piezoelectric clamping component 53 on the right clamps the transmission rod 52, causing the transmission rod 52 to drive the piezoelectric clamping component 53 on the right to move clockwise. The piezoelectric clamping component 53 on the left releases its clamp on the transmission rod 52, allowing it to remain in its original position. Then, the piezoelectric plate 51 is driven to rotate the transmission rod 52 counterclockwise. The piezoelectric clamping component 53 on the right releases its clamp on the transmission rod 52, so that the piezoelectric clamping component 53 on the right remains in its original position. The piezoelectric clamping component 53 on the left clamps the transmission rod 52, so that the transmission rod 52 drives the piezoelectric clamping component 53 on the left to move counterclockwise. This reciprocating motion causes the right end of the flexible cover 40 to move clockwise and the left end of the flexible cover 40 to move counterclockwise until the two ends of the flexible cover 40 come into contact, thereby closing the vent hole 11 of the flexible cover 40.

[0061] Taking the opening of the vent hole 11 of the flexible cover 40 as an example, when the piezoelectric plate 51 drives the transmission rod 52 to rotate clockwise, the piezoelectric plate 51 drives the transmission rod 52 to rotate clockwise. The piezoelectric clamping component 53 on the left clamps the transmission rod 52, and the piezoelectric clamping component 53 on the right releases the clamp on the transmission rod 52. Then, the piezoelectric plate 51 drives the transmission rod 52 to rotate counterclockwise. The piezoelectric clamping component 53 on the left releases the clamp on the transmission rod 52, and the piezoelectric clamping component 53 on the right clamps the transmission rod 52. This reciprocating motion causes the right end of the flexible cover 40 to move counterclockwise and the left end of the flexible cover 40 to move clockwise, thus opening the vent hole 11 of the flexible cover 40.

[0062] In other embodiments, the flexible cover 40 extends and retracts along the front-rear direction of the ear shell 10 to open or close the vent 11. This arrangement makes full use of the space of the ear shell 10 in the front-rear direction.

[0063] It is understandable that the sound output direction of the speaker assembly 20 is the forward direction, and the direction away from the sound output direction of the speaker assembly 20 is the rear direction. When the user wears the headphones 1, the direction of the ear shell 10 towards the user's ear is the forward direction, and the direction of the ear shell 10 away from the user's ear is the rear direction.

[0064] Furthermore, the driving device 50 includes a driving piezoelectric plate 51, a transmission rod 52, and a piezoelectric clamping assembly 53. The driving piezoelectric plate 51 is mounted in the rear chamber 1a; the transmission rod 52 extends along the surface of the ear shell 10 in a direction close to or away from the front chamber 1b and is driveably connected to the driving piezoelectric plate 51; the piezoelectric clamping assembly 53 is drively connected to the transmission rod 52 and the flexible cover 40, so that the piezoelectric clamping assembly 53 cooperates with the driving piezoelectric plate 51 and the transmission rod 52 to drive the flexible cover 40 to open or seal the vent hole 11. With this configuration, the piezoelectric clamping assembly 53 can selectively clamp the transmission rod 52, thereby enabling the piezoelectric clamping assembly 53 to more accurately drive the flexible cover 40 to extend and retract.

[0065] Please see Figure 6 In some embodiments, there are multiple vent holes 11, spaced apart. There are also multiple flexible covers 40, and multiple piezoelectric clamping components 53, transmission rods 52, and driving piezoelectric plates 51. Each driving piezoelectric plate 51, through its corresponding transmission rod 52 and corresponding piezoelectric clamping component 53, drives the corresponding flexible cover 40 to open or seal the corresponding vent hole 11. This can be understood as one vent hole 11 corresponding to one driving piezoelectric plate 51, one transmission rod 52, one piezoelectric clamping component 53, and one flexible cover 40. This arrangement improves the heat dissipation efficiency of the earphone 1 by providing multiple vent holes 11. Furthermore, compared to one flexible cover 40 opening or sealing multiple vent holes 11, one flexible cover 40 corresponding to one vent hole 11 reduces the travel distance of the flexible cover 40, thereby improving the efficiency of opening or sealing the vent holes 11.

[0066] The piezoelectric clamping assembly 53 includes a transmission member 531 and a clamping piezoelectric piece 532. The transmission member 531 is connected to the flexible cover 40. One end of the clamping piezoelectric piece 532 is fixedly mounted to the transmission member 531, and the other end of the clamping piezoelectric piece 532 extends towards the transmission rod 52. With this configuration, the transmission rod 52 can drive the transmission member 531 to move by abutting the clamping piezoelectric piece 532 against the transmission rod 52, thereby achieving the extension and retraction of the flexible cover 40.

[0067] The piezoelectric clamping assembly 53 can be composed of a clamping piezoelectric piece 532 and a fixing piece. The clamping or releasing of the transmission rod 52 is achieved by moving the clamping piezoelectric piece 532 closer to or further away from the fixing piece. Alternatively, the piezoelectric clamping assembly 53 can be composed of two clamping piezoelectric pieces 532. The clamping or releasing of the transmission rod 52 is achieved by moving the two clamping piezoelectric pieces 532 closer to or further away from each other. Further examples are not listed here.

[0068] Preferably, please refer to Figure 5The piezoelectric clamping assembly 53 includes a transmission member 531 and two clamping piezoelectric plates 532. The transmission member 531 is connected to the flexible cover 40. One end of each clamping piezoelectric plate 532 is fixedly mounted on the transmission member 531, and the other end can cooperate with another clamping piezoelectric plate 532 to clamp the transmission rod 52. With this configuration, the transmission rod 52 can better drive the clamping piezoelectric plates 532 to move by clamping the transmission rod 52.

[0069] For ease of understanding, the transmission rod 52 is limited to vibrating vertically. When the flexible cover 40 needs to move upward, the piezoelectric plate 51 is first driven to move the transmission rod 52 upward under the action of the first pulse electrical signal. At the same time, the clamping piezoelectric plate 532 clamps the transmission rod 52 under the action of the rising pulse, so that the transmission rod 52 drives the clamping piezoelectric plate 532 and the transmission component 531 to move upward. Then, the piezoelectric plate 51 is driven to move the transmission rod 52 downward under the action of the second pulse electrical signal. At the same time, the clamping piezoelectric plate 532 releases its clamp on the transmission rod 52 under the action of the falling pulse, so that the clamping piezoelectric plate 532 and the transmission component 531 maintain their original positions. This cycle can drive the flexible cover 40 to move upward. Conversely, by simply corresponding the first pulse electrical signal with the falling pulse and the second pulse electrical signal with the rising pulse, the flexible cover 40 can be moved downward.

[0070] Please see Figure 5 In some embodiments, the piezoelectric clamping assembly 53 further includes two clamping members 533, which are respectively connected to two clamping piezoelectric pieces 532. The two clamping piezoelectric pieces 532 can clamp the transmission rod 52 through the two clamping members 533. This arrangement can avoid the clamping piezoelectric pieces 532 from directly contacting the transmission rod 52, thus preventing wear of the clamping piezoelectric pieces 532 and extending the service life of the piezoelectric clamping assembly 53.

[0071] The clamping element 533 can be made of materials such as carbon fiber, stainless steel SU301 / SU303 / SU304, phosphor bronze, plastic PC / PET, PU, ​​rubber, or silicone. The driving piezoelectric plate 51 and the clamping piezoelectric plate 532 can be made of materials such as piezoelectric ceramics (barium carbonate BT, lead zirconate carbonate PZT, lead metaniobate, etc.) or piezoelectric crystals (crystal, lithium germanate, titanium germanate, lithium tantalate, etc.). The transmission rod 52 can be made of materials such as carbon fiber, stainless steel SU301 / SU303 / SU304, phosphor bronze, plastic PC / PET, PU, ​​rubber, or silicone.

[0072] Please see Figure 7 as well as Figure 8In some embodiments, there are multiple driving piezoelectric elements 51, which are spaced apart along the extension direction of the transmission rod 52. This arrangement can provide a greater driving force for the movement of the transmission rod 52, thereby enabling the transmission rod 52 to better drive the piezoelectric clamping assembly 53.

[0073] Please see Figure 7 as well as Figure 8 In some embodiments, multiple driving piezoelectric elements 51 are located on the same side or both sides of the transmission member 531 in the extension direction of the transmission rod 52. This arrangement can provide a greater driving force for the movement of the transmission rod 52, thereby enabling the transmission rod 52 to better drive the piezoelectric clamping assembly 53 to move.

[0074] In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0075] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two, such as two, three, etc., unless otherwise explicitly specified.

[0076] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0077] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0078] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An earphone, characterized in that, include: The ear shell has ventilation holes; A speaker assembly is disposed inside the ear shell. The speaker assembly and the ear shell cooperate to form a front chamber and a rear chamber. The front chamber and the rear chamber are connected, and the front chamber is connected to the vent hole. A flexible cover is movably mounted on the ear shell, and the flexible cover is movable relative to the ear shell to open or seal the vent hole; as well as A driving device is located in the rear cavity and connected to the flexible cover to drive the flexible cover to open or seal the vent hole.

2. The headphones as described in claim 1, characterized in that, The flexible cover is retractable relative to the ear shell to open or seal the vent.

3. The headphones as described in claim 2, characterized in that, The vent extends circumferentially along the ear shell.

4. The headphones as described in claim 3, characterized in that, The flexible cover is retractable relative to the ear shell along the circumference of the ear shell to open or seal the vent.

5. The headphones as described in claim 4, characterized in that, The ear shell includes: The housing body, the speaker assembly mounted on the housing body; and The back cover is installed on the shell body, and the back cover and the shell body are spaced apart to form the vent hole. The flexible cover is retractable along the circumference of the ear shell to open or seal the vent hole.

6. The headphones as described in claim 5, characterized in that, The shell body is provided with a first guide groove, and the flexible cover is provided with a first guide portion at one end near the shell body. The first guide portion slides in conjunction with the first guide groove. The rear cover is provided with a second guide groove, and the flexible cover is provided with a second guide portion at one end near the rear cover, the second guide portion slidingly engaging with the second guide groove.

7. The headphones as described in claim 4, characterized in that, The driving device includes: A piezoelectric element is driven and installed in the rear chamber; The transmission rod is arranged in a ring and is connected to the driving piezoelectric element in a transmission manner; and A piezoelectric clamping assembly is connected to the drive rod and the flexible cover so that the drive rod can drive the flexible cover to extend or retract to open or seal the vent hole.

8. The headphones as described in claim 2, characterized in that, The flexible cover is retractable along the front-to-back direction of the ear shell to open or seal the vent.

9. The headphones as described in claim 8, characterized in that, The driving device includes: A piezoelectric element is driven and installed in the rear chamber; A transmission rod extends along the front-rear direction of the ear shell and is connected to the driving piezoelectric plate in a transmission manner; and A piezoelectric clamping assembly is connected to the drive rod and the flexible cover so that the drive rod can drive the flexible cover to extend or retract to open or seal the vent hole.

10. The headphones as claimed in claim 1, characterized in that, The driving device includes any one of a motor driving device, a piezoelectric driving device, and a cylinder driving device.

11. The headphones as described in any one of claims 1-10, characterized in that, The speaker assembly includes: A speaker bracket is disposed inside the ear shell, and the speaker bracket is provided with a connecting hole that connects the front chamber and the rear chamber; A sealing cap is installed on the side of the speaker bracket opposite to the front chamber and cooperates with the speaker bracket to form a receiving cavity; the sealing cap, the speaker bracket, and the ear shell cooperate to form the rear chamber; and A speaker unit is disposed within the receiving cavity, which is divided into a front sound cavity and a rear sound cavity, with the front sound cavity communicating with the front chamber.

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