Open type earphone

Abstract

The embodiment of the utility model discloses an open type earphone, which comprises a wearing part, a sound production part, an electric driving assembly and a control panel, and is characterized in that the sound production part comprises a shell and a sound outlet nozzle, and the sound outlet nozzle is movably connected with the shell; the electric driving assembly is used for driving the sound outlet nozzle to telescopically move relative to the shell, so that when the open type earphone is worn, the sound outlet nozzle can be switched between an open type wearing position and an in-ear type wearing position; in the open wearing position, the sound outlet nozzle is spaced from the ear canal opening of the user, and in the in-ear wearing position, the sound outlet nozzle extends into the ear canal opening of the user; the control panel is electrically connected with the electric driving assembly, and the control panel is configured to receive a trigger instruction of a user and control the electric driving assembly to operate based on the trigger instruction. According to the technical scheme, the electric driving assembly drives the sound outlet nozzle to stretch and move, so that a user can select the sound outlet nozzle to be located at the open wearing position or the in-ear wearing position according to requirements, and the use experience of the user can be improved.

Description

Technical Field

[0001] This application relates to the field of acoustic equipment technology, and in particular to an open-back headphone. Background Technology

[0002] There are many types of headphones available now. For open-back headphones that can be worn directly on the user's ears, these headphones are usually relatively small in size and convenient to use. They can be used in various scenarios such as commuting to work, meetings, and sports, and are therefore very popular among consumers.

[0003] However, currently, for open-back headphones that are worn on the user's ear, the sound output port is usually not adjustable after wearing them. This means that in noisy environments, users need to increase the volume to hear music or calls clearly, which can lead to hearing fatigue or damage and a poor user experience. Utility Model Content

[0004] This application provides an open-back headphone designed to improve the user experience.

[0005] In a first aspect, embodiments of this application provide an open-back headphone, which includes a sound-emitting part, a wearing part, an electric drive assembly, and a control board. The wearing part is used to wear the open-back headphone on a user's ear. The sound-emitting part includes a shell and a sound outlet. The shell is connected to the wearing part, and the sound outlet is provided with a sound outlet hole. The sound outlet is movably connected to the shell and can move relative to the shell in a telescopic direction. The electric drive assembly is used to drive the sound outlet to telescopically move relative to the shell, so that when the open-back headphone is worn, the sound outlet can switch between an open-back wearing position and an in-ear wearing position. In the open-back wearing position, the sound outlet is spaced apart from the user's ear canal opening, and in the in-ear wearing position, the sound outlet extends into the user's ear canal opening. The control board is electrically connected to the electric drive assembly and is configured to receive a trigger command from the user and control the operation of the electric drive assembly based on the trigger command to drive the sound outlet to telescopically move relative to the shell.

[0006] Based on the embodiments of this application, the open-back headphones have a sound outlet movably connected to the housing, allowing the sound outlet to extend and retract relative to the housing. When the open-back headphones are worn, an electric drive component can switch the sound outlet between an open-back and in-ear wearing position. Therefore, in actual use, the user can send a trigger command as needed, and the control board will control the electric drive component to move the sound outlet based on the trigger command. This allows the user to select whether the sound outlet is in an open-back or in-ear wearing position, enabling automatic and convenient mode switching between open-back and in-ear modes, thus improving the user experience. Attached Figure Description

[0007] 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.

[0008] Figure 1 This is a schematic diagram of the structure of an open-back headphone according to an embodiment of this application;

[0009] Figure 2 for Figure 1 Exploded view of the vocal part;

[0010] Figure 3 A flowchart illustrating a control method for an open-back headphone provided in an embodiment of this application;

[0011] Figure 4 This is a cross-sectional view of an open-back headphone according to an embodiment of this application;

[0012] Figure 5 This is an exploded view of an electrically driven component in one embodiment of this application;

[0013] Figure 6 This is an exploded view of the electric drive assembly in another embodiment of this application;

[0014] Figure 7 This is a cross-sectional view of an open-back headphone according to another embodiment of this application;

[0015] Figure 8 This is a partial structural cross-sectional view of an open-back headphone in another embodiment of this application;

[0016] Figure 9 This application also provides a schematic diagram of the structure of an open-back headphone according to an embodiment.

[0017] 1. Open-back headphones; 10. Sound-emitting part; 11. Housing; 111. Sound outlet; 112. Receiving cavity; 113. First housing part; 114. Second housing part; 115. Contact surface; 12. Sound outlet; 121. Sound outlet; 122. Clip groove; 13. Ear cap; 131. Sound outlet; 132. Clip; 14. Guide structure; 141. Guide groove; 142. Guide block; 15. Bracket; 16. Sealing ring; 20. Wearing part; 30. Electric drive assembly; 31. Rack; 32. Gear; 33. Motor; 34. Gearbox; 341, Sun gear; 342, Planetary gear; 343, Ring gear; 344, Planet carrier; 345, Harmonic generator; 346, Flexible gear; 347, Rigid gear; 35, Piezoelectric vibrator; 36, Friction block; 37, Clamping component; 371, Elastic clamping part; 38, Magnetic component; 39, Electromagnetic coil; 40, Control board; 50, Touch button; 51, First touch area; 52, Second touch area; 60, Sound pickup assembly; 61, Microphone; 70, Detection assembly; 71, Detected component; 72, Hall sensor. Detailed Implementation

[0018] 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.

[0019] For existing open-back headphones, since the sound outlet is usually not adjustable after wearing, users need to increase the volume in noisy environments to hear music or make calls, which can lead to hearing fatigue or damage and a poor user experience.

[0020] Therefore, this application proposes an open-back headphone designed to improve the user experience.

[0021] Please see Figures 1 to 2 In this embodiment, the open-back earphone 1 includes a sound-emitting part 10, a wearing part 20, and an electric drive assembly 30. The sound-emitting part 10 is connected to the wearing part 20, and the wearing part 20 is used to wear the open-back earphone on the user's ear. The sound-emitting part 10 is used to generate sound signals. The wearing part 20 can cooperate with the sound-emitting part 10 to wear the open-back earphone 1 on the user's ear. In addition, the open-back earphone 1 of this application is also provided with a battery and an electronic control board. The battery is electrically connected to the electronic control board and is used to supply power to the whole device.

[0022] Depending on the wearing part 20, the open-back earphone 1 can be either a clip-on earphone or an ear-hook earphone. When the open-back earphone 1 is a clip-on earphone, the wearing part 20 is formed as an ear clip structure. This ear clip structure deforms to create a clamping force and cooperates with the sound-generating part 10 to clamp the user's ear. Specifically, the wearing part 20 includes a housing and a connecting bridge. The connecting bridge connects the housing and the sound-generating part 10, and the housing is positioned opposite to the sound-generating part 10 to clamp the open-back earphone 1 onto the user's ear. It is understood that the battery and control board can be housed within the housing. Alternatively, the battery and control board can be housed separately within the housing and the sound-generating part 10, or both can be housed within the sound-generating part 10. In the wearing state, the housing is located behind the user's auricle and cooperates with the sound-generating part 10 to clamp the user's auricle.

[0023] When the open-back headphones 1 are ear-hook type headphones, the wearing part 20 is an ear-hook structure, which is hung between the back of the user's ear and the head to wear the headphones on the user's ear. In one structural form, the wearing part 20 includes a housing and an ear hook, the ear hook connecting the housing and the sound-emitting part 10, for hanging the open-back headphones 1 on the user's ear. The battery can be placed in the housing, and the control board can also be placed in the housing. Of course, the battery and the control board can also be placed separately in the housing and the sound-emitting part 10, or both the battery and the control board can be placed in the sound-emitting part 10. The ear hook is hook-shaped and can wrap around from the top of the user's auricle to the front of the user, so as to hang on the user's ear. Of course, when the open-back headphones 1 are ear-hook type headphones, the wearing part 20 can also only include the ear hook, with the battery and the control board both placed in the sound-emitting part 10, and hung between the back of the user's ear and the head in a hook shape, thus realizing the wearing of the entire open-back headphones 1.

[0024] Please see Figure 4 The sound-emitting part 10 includes a housing 11 and a sound outlet 12. The housing 11 is connected to the wearing part 20. The sound outlet 12 has a sound outlet hole 121. The sound outlet 12 is movably connected to the housing 11 and is telescopically movable relative to the housing 11, so that the distance between the sound outlet hole 121 and the user's ear canal opening can be adjusted when the open-back headphones 1 are worn. It should be noted that the sound outlet 12 is telescopically movable relative to the housing 11 and has an extended state and a retracted state. When the sound outlet 12 is in the retracted state, the sound outlet hole 121 is spaced apart from the user's ear canal opening; when the sound outlet 12 is in the extended state, the sound outlet hole 121 and the user's ear canal opening may or may not be spaced apart, as will be described in detail below. It should be noted that the shape and size of the sound outlet hole 121 are not specifically limited. For example, the sound outlet hole 121 can be a strip hole or a round hole. In some embodiments, a sound outlet mesh can be provided at the sound outlet hole 121, and the shape and structure of the sound outlet mesh are not specifically limited.

[0025] Understandably, the sound-generating part 10 also includes a speaker assembly disposed within the housing 11. The speaker assembly is the core component for generating sound, converting electrical signals into sound signals. The speaker assembly can be, for example, a dynamic loudspeaker or an electrostatic loudspeaker. The sound generated by the speaker assembly propagates to the outside through the sound outlet 121. Furthermore, the open-back earphone 1 of this application is an air-conduction earphone, meaning that the sound generated by the speaker assembly propagates through the air and enters the user's ear canal. The battery and control board can be disposed together with the speaker assembly in the sound-generating part 10. Of course, other arrangements are also possible. For example, the control circuit board and the speaker assembly can be located together in the sound-generating part 10, while the battery is located in the wearing part 20; or the battery and control board can be located in the wearing part 20, while the speaker assembly is located in the sound-generating part 10; or the speaker assembly and the main control board can be located in the sound-generating part 10, while the battery is located in the wearing part 20. All these arrangements are feasible. The battery can be a rechargeable lithium battery or a disposable dry cell battery; this application does not limit this.

[0026] The electric drive assembly 30 is connected to the sound outlet 12. The electric drive assembly 30 is used to drive the sound outlet 12 to move telescopically relative to the housing 11 so that when the open-ear headphones 1 are worn, the sound outlet 12 can switch between an open-ear wearing position and an in-ear wearing position. In the open-ear wearing position, the sound outlet 12 is spaced apart from the user's ear canal opening. In the in-ear wearing position, the sound outlet 12 extends into the user's ear canal opening.

[0027] There are many types of electric drive components 30. The electric drive component 30 can drive the sound outlet 12 to move by magnetic force, or it can drive the sound outlet 12 to move by a motor 33. No specific limitation is made here. The electric drive component 30 is installed inside the sound-producing part 10, which can reduce the distance between the electric drive component 30 and the sound outlet 12, thereby simplifying the structure of the electric drive component 30.

[0028] Please see Figure 2 The control board 40 is electrically connected to the electric drive assembly 30. The control board 40 is configured to receive user trigger commands and control the operation of the electric drive assembly 30 based on the trigger commands. There are many ways to electrically connect the control board 40 and the electric drive assembly 30. The control board 40 can be electrically connected to the electric drive assembly 30 via wires, or it can be electrically connected to the electric drive assembly 30 wirelessly via Bluetooth, WiFi, or other methods. No specific limitation is made here.

[0029] There are many ways for a user to send trigger commands to the control board 40. For example, the open-back headphones 1 may have a control button that extends into the housing 11, allowing the user to send trigger commands to the control board 40 by pressing the button. Alternatively, the circuit board may be connected to the user's mobile phone via Bluetooth, allowing the user to send trigger commands to the control board 40 through the phone. Another example is the open-back headphones 1 equipped with a pressure sensor, allowing the user to send trigger commands to the control board 40 by pressing the sensor. Yet another example is the open-back headphones 1 equipped with a remote control, allowing the user to send trigger commands to the control board 40 through the remote control. Finally, the open-back headphones 1 may have a voice control module, allowing the user to trigger the voice control module by uttering sounds, sending trigger commands to the control board 40. These are just a few examples.

[0030] It should be noted that there are many ways in which the control board 40 controls the operation of the electric drive component 30 based on trigger commands to control the movement distance of the sound outlet 12. For example, the movement distance of the sound outlet 12 can be controlled by controlling the running time of the electric drive component 30. Or, the open-back headphones 1 can be equipped with a position detection device to detect the position of the sound outlet 12. These methods will not be listed here.

[0031] Based on the open-back earphone 1 of this application embodiment, the sound outlet 12 is movably connected to the housing 11, allowing the sound outlet 12 to extend and retract relative to the housing 11. When the open-back earphone 1 is worn, the sound outlet 12 can be driven by the electric drive component 30 to switch between an open-back wearing position and an in-ear wearing position. Therefore, in actual use, the user can send a trigger command as needed, and the control board 40 will control the electric drive component 30 to move the sound outlet 12 based on the trigger command. This allows the user to select whether the sound outlet 12 is in an open-back wearing position or an in-ear wearing position, realizing automatic and convenient mode switching between open-back and in-ear modes for the open-back earphone 1, thus improving the user experience.

[0032] Please see Figure 1 In some embodiments of this application, the open-back earphone 1 further includes a touch button 50, which is disposed on the open-back earphone 1 and electrically connected to the control board 40. The trigger command includes a button trigger command. The control board 40 is configured to, upon receiving a button trigger command from the user, control the electric drive component 30 to operate based on the button trigger command to adjust the position of the sound outlet 12. With this configuration, the user can send a button trigger command to the control board 40 via the touch button 50 to control the electric drive component 30 to drive the sound outlet 12 to switch between an open-back wearing position and an in-ear wearing position. Simultaneously, the user does not need to rely on other devices to send trigger commands to the control board 40, thus facilitating user operation of the open-back earphone 1.

[0033] For example, when a user triggers the touch button 50 once, the touch button 50 sends a button operation command to the control board 40. Based on the button operation command, the control board 40 controls the electric drive component 30 to drive the sound outlet 12 to switch positions once. This can be understood as follows: if the sound outlet 12 is in the open-ear position, when the user triggers the touch button 50 once, the control board 40 controls the electric drive component 30 to drive the sound outlet 12 to switch to the in-ear position; if the sound outlet 12 is in the in-ear position, when the user triggers the touch button 50 once, the control board 40 controls the electric drive component 30 to drive the sound outlet 12 to switch to the open-ear position.

[0034] For example, please refer to Figure 1 and Figure 3 The touch button 50 includes a first touch area 51 and a second touch area 52. The button trigger commands include open-back commands and in-ear commands. The first touch area 51 is configured for user triggering to generate an open-back command, and the second touch area 52 is configured for user triggering to generate an in-ear command. The control board 40 is configured to, when receiving a user trigger command of an open-back command, control the electric drive component 30 to move the sound outlet 12 to an open-back position; and to, when receiving a user trigger command of an in-ear command, control the electric drive component 30 to move the sound outlet 12 to an in-ear position. Thus, when the user needs to switch the sound outlet 12 to an open-back position, they only need to trigger the first touch area 51; when the user needs to switch the sound outlet 12 to an in-ear position, they only need to trigger the second touch area 52, allowing the user to precisely switch the position of the sound outlet 12. Meanwhile, the touch button 50 is divided into a first touch area 51 and a second touch area 52, which can reduce the frequency of user triggering a single touch area, thereby avoiding wear and malfunctions caused by excessive triggering frequency of a single touch area, and thus extending the service life of the touch button 50.

[0035] Please see Figure 2 In some embodiments of this application, the open-back headphones 1 further include a pickup component 60, which is electrically connected to the control board 40. The pickup component 60 is used to pick up ambient noise. The trigger command includes an automatic switching command. The control board 40 is configured to, upon receiving a user's trigger command of automatic switching, control the electric drive component 30 to operate based on a comparison between the ambient noise picked up by the pickup component 60 and a preset value, thereby adjusting the position of the sound outlet 12. With this configuration, the open-back headphones 1 can control the electric drive component 30 to drive the sound outlet 12 to switch between an open-back wearing position and an in-ear wearing position according to the level of external ambient noise, thus facilitating user operation. It should be noted that ambient noise refers to the sound of the external environment, which can be understood as any sound other than the sound emitted by the open-back headphones 1.

[0036] Specifically, please refer to Figure 3 The control board 40 is configured to, when receiving a user's trigger command as an automatic switching command, control the electric drive component 30 to drive the sound outlet 12 to switch to an in-ear wearing position based on the external ambient noise picked up by the sound pickup component 60 being higher than a preset value; or control the electric drive component 30 to drive the sound outlet 12 to switch to an open-ear wearing position based on the external ambient noise picked up by the sound pickup component 60 being lower than a preset value.

[0037] With this configuration, when the ambient noise exceeds a preset value, the control board 40 controls the electric drive component 30 to drive the sound outlet 12 to switch to an in-ear wearing position, thereby protecting the user's ears and preventing damage from excessive ambient noise. When the ambient noise is below the preset value, the control board 40 controls the electric drive component 30 to drive the sound outlet 12 to switch to an open wearing position, allowing ambient sound to propagate and diffuse naturally without sound reflection and resonance caused by the closed ear canal. This makes the sound more natural, realistic, and expansive, with a better sense of space and layering. It also allows for better perception of the surrounding environment, avoidance of potential dangers, and improved travel safety.

[0038] Please see Figure 3 First, the user sends an automatic switching command to the control board 40. The pickup component 60 picks up external ambient noise. When the ambient noise picked up by the pickup component 60 is higher than the preset value, the control board 40 controls the electric drive component 30 to drive the sound outlet 12 to switch to the in-ear wearing position. The pickup component 60 continues to pick up external ambient noise. When the ambient noise picked up by the pickup component 60 is lower than the preset value, the control board 40 controls the electric drive component 30 to drive the sound outlet 12 to switch to the open wearing position, and so on.

[0039] Please see Figure 2 In some embodiments of this application, the sound pickup component 60 includes multiple microphones 61, all of which are electrically connected to the control board 40. With this configuration, the multiple microphones 61 can achieve omnidirectional sound source localization, accurately capture environmental noise from different directions, avoid misjudgment caused by angle deviation of a single microphone 61, and simultaneously optimize voice acquisition during calls. By suppressing environmental interference through the array of multiple microphones 61, call clarity is ensured and user experience is improved. At the same time, when one microphone 61 is blocked or malfunctions, the other microphones 61 can still continue to work.

[0040] Please see Figure 2 In some embodiments of this application, the open-back headphone 1 further includes a detection component 70, which is electrically connected to the control board 40 and is used to detect the position information of the sound outlet 12. This configuration allows for the detection of the position of the sound outlet 12, thereby increasing the number of operable modes of the open-back headphone 1.

[0041] For example, the control board 40 uses the detection component 70 to detect the position information of the sound outlet 12 to determine whether the sound outlet 12 has moved to a designated position, thereby ensuring the accuracy of the sound outlet 12's positional movement. As another example, the control board 40 uses the detection component 70 to detect the position information of the sound outlet 12 to adjust the output audio, thereby improving the user experience. These are just a few examples.

[0042] Specifically, please refer to Figure 3 The control board 40 is configured to receive the detection signal from the detection component 70, and based on the detection signal and trigger command, determine that the sound outlet 12 has moved to a designated position, and control the electric drive component 30 to stop operating; or based on the detection signal and trigger command, determine that the sound outlet 12 has not moved to the designated position, and control the electric drive component 30 to continue operating. It should be noted that the designated position refers to the position that the user requires the sound outlet 12 to move to.

[0043] For example, when the user needs to move the mouthpiece 12 to the open-fit position, the control board 40 controls the electric drive component 30 to operate based on the trigger command. When the detection component 70 detects that the mouthpiece 12 is in the open-fit position, the control board 40 will stop the electric drive component 30 from operating based on the detection signal, thereby ensuring that the mouthpiece 12 is accurately located in the open-fit position.

[0044] For example, when the user needs to move the sound outlet 12 to the in-ear wearing position, the control board 40 controls the electric drive component 30 to operate based on the trigger command. When the detection component 70 detects that the sound outlet 12 is in the in-ear wearing position, the control board 40 will stop the electric drive component 30 from operating based on the detection signal, thereby ensuring that the sound outlet 12 is accurately in the in-ear wearing position, avoiding excessive pressure on the user's ear by the sound outlet 12, thereby improving the user's experience.

[0045] Please see Figure 2In some embodiments of this application, the detection component 70 includes a detected element 71 and at least two Hall sensors 72. The detected element 71 is mounted on the sound outlet 12, and the Hall sensors 72 are mounted on the housing 11. The Hall sensors 72 are electrically connected to the control board 40, and the at least two Hall sensors 72 are arranged at intervals along the extension direction of the sound outlet 12. The control board 40 is configured to receive the detection signals from the Hall sensors 72, determine the position information of the sound outlet 12 based on the detection signals from the Hall sensors 72, and control the operation of the electric drive component 30 to adjust the position of the sound outlet 12. The detected element 71 is used to generate a magnetic field and can be a permanent magnet, magnetic strip, etc. The Hall sensor 72 is a sensor based on the Hall effect, which can convert a changing magnetic field into a change in output voltage. Based on the electrical signals detected by each of the at least two Hall sensors 72, the relative position between the Hall sensors 72 and the detected element 71 is determined, thereby determining the current position of the sound outlet 12. This further improves the accuracy of the detection of the position of the sound outlet 12. At least two Hall sensors 72 can be arranged adjacently or spaced apart; no specific limitation is made here.

[0046] The housing 11 protects the speaker assembly; that is, the speaker assembly can be fixedly installed inside the housing 11, dividing the housing 11 into a front cavity and a rear cavity, with the sound outlet 121 communicating with the front cavity. During the extension and retraction of the sound outlet 12, the position of the speaker assembly within the housing 11 remains unchanged. Furthermore, the housing 11 can be an open slotted structure, with the sound outlet 12 covering the open portion of the housing 11. The sound emitted by the speaker assembly propagates outward through the open portion and the sound outlet 121 on the sound outlet 12. The sound outlet 121 on the sound outlet 12 is a plurality of micropores arranged in an array. Alternatively, the housing 11 can be a relatively closed cavity structure without an open portion, with corresponding sound outlet 111 on the housing 11. The sound outlet 111 is also a plurality of micropores arranged in an array, and the sound emitted by the speaker assembly propagates outward through the sound outlet 111 and the sound outlet 121 on the sound outlet 12.

[0047] In both of the above structural forms, the sound outlet 12 is a cover with an opening on one side, and the sound outlet 12 is slidably fitted onto the housing 11. When the housing 11 is an open groove structure, the sound outlet 12 can be nested inside the housing 11; alternatively, the sound outlet 12 can be fitted onto the outside of the housing 11. When the housing 11 is a relatively closed cavity structure, the sound outlet 12 can be fitted onto the outside of the housing 11. In the above-described example where the housing 11 and the sound outlet 12 are slidably fitted together, the speaker assembly can also be mounted on the sound outlet 12. In this configuration, during the extension and retraction of the sound outlet 12, the speaker assembly moves relative to the housing 11.

[0048] In other embodiments, in order to enable the sound outlet 12 to extend and retract relative to the housing 11, the two can be connected by a telescopic component. For example, the sound outlet 12 can be connected to the housing 11 by a bellows structure. In this way, the extension and retraction of the sound outlet 12 relative to the housing 11 can be achieved by extending and retracting the bellows structure.

[0049] The electric drive assembly 30 is configured to drive the sound outlet 12 to extend and retract between an open position and a noise-canceling position. In the open position, the sound outlet 12 is retracted relative to the housing 11; in the noise-canceling position, the sound outlet 12 extends relative to the housing 11 and abuts against the user's ear canal. It should be noted that the open and noise-canceling positions represent the extreme states of the sound outlet 12 during adjustment. In actual use, the user can adjust the sound outlet 12 to an intermediate position between the first and second positions according to their own needs. With this configuration, when the sound outlet 12 is in the noise-canceling position, it can abut against the user's ear canal, thereby isolating some external sounds and achieving a noise-canceling effect. Furthermore, the open-back headphones 1 can switch between in-ear and open-back wearing modes, greatly enriching the usage scenarios of the open-back headphones 1 and making them more convenient to use.

[0050] When the sound outlet 12 is in the open position, the sound outlet 12 is located outside the user's ear canal and the sound outlet 121 is separated from the ear canal opening, so that the open-back headphones 1 switch to an open-back wearing mode. This allows external ambient sounds to enter and blend naturally with the sound played by the open-back headphones 1, providing a more open and transparent listening experience and reducing the pressure of listening for a long time.

[0051] Further, please refer to Figure 2 In the noise-canceling position, the sound outlet 12 blocks the user's ear canal opening. With this configuration, when the sound outlet 12 is in the noise-canceling position, the open-back headphones 1 can effectively isolate external noise, allowing users to enjoy clear sound quality without excessively high volumes, protecting their hearing, and creating a more immersive listening experience. This provides excellent bass response and detail resolution, meeting the needs of music lovers.

[0052] Please see Figure 2 In some embodiments of this application, the sound-emitting part 10 further includes an ear cap 13, which is fitted over the sound outlet 12 and has a sound-emitting hole 131. The ear cap 13 is used to seal against the user's ear canal when the sound outlet 12 is in the noise-reducing position. The ear cap 13 is made of a flexible material, such as silicone. The ear cap 13 allows for a tighter seal against the ear canal, thus more effectively isolating external noise.

[0053] To prevent the sound outlet 12 from twisting relative to the housing 11 during the extension and retraction of the sound outlet 12, this application further provides a guide structure 14 between the sound outlet 12 and the housing 11. The guide structure 14 is used to prevent the sound outlet 12 from twisting circumferentially with the housing 11 during the extension and retraction process. Specifically, please refer to... Figure 2 The guide structure 14 may include a guide groove 141 and a guide block 142. The guide groove 141 may be disposed on the mouthpiece 12 or on the housing 11 and extends along the extension direction of the mouthpiece 12. The guide block 142 slides along the guide groove 141. That is, the positions of the guide groove 141 and the guide block 142 in this application can be interchanged between the mouthpiece 12 and the housing 11. By setting the guide structure 14, relative torsion between the mouthpiece 12 and the housing 11 is avoided. Therefore, when the cross-sectional shape of the mouthpiece 12 and the housing 11 is not circular, interference between the mouthpiece 12 and the housing 11 can be effectively avoided, and deformation of the structure of the mouthpiece 12 can be avoided.

[0054] Of course, in other structural forms, the guide structure 14 can be omitted, and the effect can be achieved through the shape of the housing 11 and the sound outlet 12. For example, the cross-sectional contours of the housing 11 and the sound outlet 12 can be set as racetrack-shaped, polygonal, etc., so that there are mutually sliding and engaging planes between the housing 11 and the sound outlet 12, thereby preventing the sound outlet 12 from twisting relative to the housing 11 during the pulling process.

[0055] Please see Figure 2 In one embodiment, the electric drive assembly 30 includes a rack 31, a gear 32, and a motor 33. The rack 31 is fixedly connected to the sound outlet 12, and the gear 32 meshes with the rack 31. The motor 33 is electrically connected to the control board 40, and the output end of the motor 33 is driven by the gear 32 to rotate, thereby driving the gear 32 to rotate and move the rack 31 along the extension direction of the sound outlet 12. It should be noted that the rotation of the output end of the motor 33 drives the gear 32 to rotate. The gear 32, through its meshing with the teeth on the rack 31, drives the rack 31 to move along the extension direction of the sound outlet 12. The rack 31 is fixedly connected to the sound outlet 12, thus allowing the rack 31 and the sound outlet 12 to move synchronously, and consequently, the sound outlet 12 moves along the extension direction of the sound outlet 12 along with the rack 31. This structure has the advantages of simple structure and fewer parts. It should be noted that the extension direction of the sound outlet 12 is consistent with the extension / retraction direction of the sound outlet 12.

[0056] Further, please refer to Figure 2The electric drive assembly 30 also includes a gearbox 34. One end of the gearbox 34 is connected to the output of the motor 33, and the other end is connected to the gear 32. With this configuration, the torque output by the motor 33 is amplified by the gearbox 34 and drives the rack 31 to move via the gear 32. This allows the motor 33 to better drive the rack 31. Simultaneously, during the transmission between the gear 32 and the rack 31, when the load suddenly increases beyond the system's capacity, the gearbox 34 can provide a certain degree of buffering and protection.

[0057] For a better option, please refer to the following: Figure 5 as well as Figure 6 The gearbox 34 can be any type of planetary gearbox or harmonic reducer. This configuration minimizes the size of the gearbox 34, thereby reducing the size of the open-back headphone 1.

[0058] Specifically, please refer to Figure 5 The planetary gear transmission includes a sun gear 341, planetary gears 342 and 32, a ring gear 343, and a planet carrier 344. The sun gear 341 is connected to the output end of the motor 33. The planetary gears mesh with the outer teeth of the sun gear 341. The number of planetary gears is usually determined according to the design requirements and load-bearing capacity of the transmission, typically ranging from 3 to 6. The inner side of the ring gear 343 has teeth and is fitted onto the outer side of the sun gear 341. The planetary gears mesh with the inner teeth of the ring gear 343. Essentially, the planetary gear 342 and 32 are located between the outer side of the sun gear 341 and the inner side of the ring gear 343. The planet carrier 344 supports the planetary gear 342 and 32 and drives it to revolve around the sun gear 341. The planet carrier 344 is the power output component, transmitting the motion of the planetary gear 342 and 32. The planet carrier 344 is connected to the gear 342.

[0059] Specifically, please refer to Figure 6The harmonic reducer includes a harmonic generator 345, a flexible gear 346, and a rigid gear 347. The harmonic generator 345 typically consists of an elliptical cam and a flexible bearing. The elliptical cam has different lengths for its major and minor axes, causing periodic deformation of the flexible bearing as it rotates. The flexible gear 346 is a thin-walled, externally toothed elastic element with slightly fewer teeth than the rigid gear 347. Under the action of the harmonic generator 345, the flexible gear 346 undergoes elastic deformation, and its external teeth mesh with the internal teeth of the rigid gear 347. Due to the elastic characteristics of the flexible gear 346, it can adapt to the deformation caused by the harmonic generator 345 and transmit power during the deformation process. The rigid gear 347 is a rigid gear 32 with internal teeth, having more teeth than the flexible gear 346. The main function of the rigid gear 347 is to mesh with the external teeth of the flexible gear 346, and its position remains relatively fixed during the operation of the reducer, providing stable support for the deformation of the flexible gear 346 and power transmission.

[0060] When the harmonic generator 345 begins to rotate, its elliptical structure causes the flexible wheel 346 to undergo elastic deformation. At the major axis of the ellipse, the external teeth of the flexible wheel 346 are fully engaged with the internal teeth of the rigid wheel 347; while at the minor axis, the external teeth of the flexible wheel 346 are disengaged or partially engaged with the internal teeth of the rigid wheel 347. As the harmonic generator 345 rotates, this engagement changes continuously along the circumference of the flexible wheel 346, creating a wave-like deformation pattern, hence the name "harmonic."

[0061] During the deformation of the flexible wheel 346, due to the difference in the number of teeth between the flexible wheel 346 and the rigid wheel 347, when the harmonic generator 345 rotates through a certain angle, the flexible wheel 346 will lag or lead the rigid wheel 347 by a certain angle. For example, if the rigid wheel 347 is fixed, the harmonic generator 345 is the input, and the flexible wheel 346 is the output, then when the harmonic generator 345 rotates clockwise, the flexible wheel 346 will rotate clockwise at a slower speed. Assuming that the rigid wheel 347 has 200 teeth and the flexible wheel 346 has 198 teeth, for every revolution of the harmonic generator 345, the flexible wheel 346 will rotate 2 fewer teeth relative to the rigid wheel 347, thus achieving speed reduction transmission.

[0062] Please see Figure 7In another embodiment, the electric drive assembly 30 includes a piezoelectric vibrator 35 and a friction block 36. The piezoelectric vibrator 35 is electrically connected to the control board 40. The friction block 36 is disposed at the output end of the piezoelectric vibrator 35 and makes transmission contact with the sound outlet 12, so that the piezoelectric vibrator 35 drives the friction block 36 to move, thereby causing the sound outlet 12 to move along the extension direction of the sound outlet 12. It should be noted that the ultrasonic vibration generated by the piezoelectric effect causes the friction block 36 fixed on the piezoelectric vibrator 35 to generate synchronous high-frequency vibration. This vibration can drive the sound outlet 12 to move linearly through the friction between the friction block 36 and the sound outlet 12. By adjusting the drive waveform, the sound outlet 12 can be moved along the contraction direction. This structural form has the advantages of simple structure and fewer parts.

[0063] The transmission contact between the friction block 36 and the sound outlet 12 can be achieved by setting a clamping part on the sound outlet 12 and clamping the friction block 36 by the clamping part, or by using electromagnetic attraction to make the sound outlet 12 and the friction block 36 in close contact, or by using the weight of the sound outlet 12 itself to press on the friction block 36. These methods will not be listed here.

[0064] Preferably, please refer to Figure 7 The electric drive assembly 30 also includes a clamping member 37, one end of which is fixedly connected to the sound outlet 12, and the other end is provided with an elastic clamping part 371, which clamps the outer peripheral wall of the friction block 36. This arrangement, by clamping the friction block 36 with the elastic clamping part 371, makes the transmission contact between the friction block 36 and the sound outlet 12 more stable, thereby allowing the electric drive assembly 30 to better drive the sound outlet 12.

[0065] Furthermore, the friction block 36 is made of carbon fiber. Carbon fiber has high hardness, and in a piezoelectric ceramic-driven ultrasonic linear motion system, the friction block 36 needs to frequently contact the sliding block and generate friction. The high hardness of carbon fiber allows it to withstand this frictional action, reducing its own wear. For example, during prolonged linear motion, compared to some soft materials, the shape and size of the friction block 36 made of carbon fiber can remain more stable, thus maintaining stable frictional performance. Its good wear resistance can extend the service life of the friction block 36. At the same time, using carbon fiber friction blocks 36 can reduce the frequency of component replacement and lower maintenance costs.

[0066] Please see Figure 8In another embodiment, the electric drive assembly 30 includes a magnetic element 38 and an electromagnetic coil 39. The magnetic element 38 is fixedly connected to the sound outlet 12; the electromagnetic coil 39 is electrically connected to the control board 40 and is used to drive the magnetic element 38 to move along the extension direction of the sound outlet 12. By changing the direction of the current flow in the electromagnetic coil 39, the magnetic field generated by the electromagnetic coil 39 is changed, thereby changing the direction of movement of the magnetic element 38. The magnetic element 38 is fixedly connected to the sound outlet 12, so that the magnetic element 38 and the sound outlet 12 move synchronously. Thus, the magnetic element 38 drives the sound outlet 12 to move along the extension direction of the sound outlet 12. This structure has the advantages of simple structure and fewer parts.

[0067] Alternatively, the electromagnetic coil 39 can be positioned between the magnetic component 38 and the sound outlet 12. In this case, when the electromagnetic coil 39 attracts the magnetic component 38 closer, the sound outlet 12 moves towards extending out of the housing 11; when the electromagnetic coil 39 repels the magnetic component, the sound outlet 12 moves towards retracting into the housing 11. Another option is to position the magnetic component 38 between the electromagnetic coil 39 and the sound outlet 12. In this case, when the electromagnetic coil 39 attracts the magnetic component 38 closer, the sound outlet 12 moves towards retracting into the housing 11; when the electromagnetic coil 39 repels the magnetic component, the sound outlet 12 moves towards extending out of the housing 11. These variations are not exhaustive.

[0068] Further, please refer to Figure 8 The electric drive assembly 30 includes an iron core located inside the electromagnetic coil 39. This arrangement enhances the magnetic field strength generated by the electromagnetic coil 39 and concentrates the magnetic field on the iron core, thereby enabling the electromagnetic coil 39 to better drive the magnetic component 38.

[0069] Please see Figure 4In some embodiments of this application, the ear cap 13 is detachably connected to the sound outlet 12 and is sleeved on the outside of the sound outlet 12. The ear cap 13 has a sound outlet 131 that communicates with the sound outlet 121, and the ear cap 13 is made of a flexible material, such as silicone. Therefore, combined with the structure that allows the sound outlet 12 to extend and retract relative to the housing 11, users can disassemble and reassemble the ear cap 13 to select a more suitable ear cap 13. For example, when extending the sound outlet 12 to shorten the distance from the sound outlet 121 to the ear canal opening, if the sound outlet 12 has reached its extension limit and the sound leakage is still relatively serious, the ear cap 13 can be disassembled and reassembled to replace it with a larger ear cap 13. This can achieve a tighter seal on the ear canal opening, more effectively isolate external noise, achieve a higher noise reduction effect, and thus improve the listening experience. When retracting the sound outlet 12 to increase the distance from the sound outlet 12 to the ear canal opening, if the user still feels that the area where the sound outlet 12 is located in the ear canal opening is unreasonable and causes discomfort, the ear cap 13 can also be disassembled and reassembled to replace it with a smaller ear cap 13. This can further increase the distance from the ear cap 13 to the ear canal opening, improve the adaptability of the open-back headphones 1, and give the user a more comfortable user experience. The above-mentioned configuration enables the open-back headphone 1 of this application to be suitable for users with ears of different sizes and to achieve a better listening experience, thereby meeting the needs of different users.

[0070] Furthermore, the detachable connection between the ear cap 13 and the sound outlet 12 allows the ear cap 13 to be easily removed for cleaning or replacement. This is especially beneficial for users who frequently sweat or use the device in humid environments, helping them maintain the hygiene of the ear cap 13. Additionally, the detachable connection between the ear cap 13 and the sound outlet 12 allows users to easily change to various sizes or types of ear caps 13. Users can choose the appropriate ear cap 13 according to their preferences or ear size, improving wearing comfort and making it convenient to change ear caps 13 for different usage scenarios.

[0071] Please see Figure 4In some embodiments, one of the ear cap 13 and the sound outlet 12 is provided with a snap fastener 132, and the other of the ear cap 13 and the sound outlet 12 is provided with a snap groove 122, with the snap fastener 132 snapping into the snap groove 122. The ear cap 13 and the sound outlet 12 are detachably connected by the snap fastener 132 snapping into the snap groove 122, reducing wear caused by traditional screws or other fixing methods, lowering the risk of damage due to repeated disassembly and assembly, and thus extending the service life of the open-back headphones 1. This structure allows users to quickly install or easily remove the ear cap 13 from the sound outlet 12 without additional tools, facilitating rapid disassembly and replacement of the ear cap 13, greatly improving ease of use. Furthermore, the installation is highly secure, preventing the ear cap 13 from accidentally falling off due to high-intensity activity during wear, thus enhancing the overall stability of the open-back headphones 1. The snap-fit ​​design also ensures the precision of the assembly between the ear cap 13 and the sound outlet 12 during each installation, thereby ensuring that the sound outlet 131 of the ear cap 13 can be accurately aligned with the sound outlet 121 of the sound outlet 12 after each replacement, avoiding sound transmission problems caused by positional misalignment and ensuring consistent audio quality.

[0072] In other embodiments, the detachable connection between the ear cap 13 and the sound outlet 12 can also be achieved through a magnetic structure. For example, two magnets are respectively provided on the ear cap 13 and the sound outlet 12. Utilizing the principle of attraction between opposite magnetic poles, the ear cap 13 and the sound outlet 12 can attract each other and connect tightly when they are close together, and can also be easily separated when disassembly is required, greatly simplifying the user's operation process and improving ease of use. The magnetic force helps the sound hole 131 of the ear cap 13 automatically align with the position of the sound outlet 121, ensuring that the sound hole 131 can be accurately aligned with the sound outlet 121 every time it is installed, improving installation accuracy and ensuring the quality of sound transmission. Through the design of the magnetic structure, users can easily install and remove the ear cap 13 without complicated operations, compare the fit of different sizes of ear cap 13 with the user's ears, so that the open-back headphones 1 can be used by users with different ear sizes and achieve a better listening experience, thereby meeting the needs of different users.

[0073] Please see Figure 4In some embodiments, the open-back earphone 1 further includes a support 15, which is connected to the ear cap 13 and supported between the ear cap 13 and the sound outlet 12. In the case where the sound outlet 12 is a cover with an opening on one side, and the sound outlet 12 and the housing 11 are in a slidable sleeve structure, the housing 11 is a groove structure with an open opening, and the sound outlet 12 can be nested inside the housing 11. In this case, the ear cap 13 is sleeved on the outside of the sound outlet 12. When the sound outlet 12 is in a retracted state or in the process of extending, the end of the ear cap 13 away from the sound hole 131 is located between the housing 11 and the sound outlet 12, and the ear cap 13 abuts against the inner wall surface of the housing 11 and the outer wall surface of the sound outlet 12 respectively, to seal the opening of the housing 11, improve the airtightness, prevent sound leakage, and prevent foreign objects from entering the interior of the housing 11 and affecting the normal operation of the open-back earphone 1. Thus, when the sound outlet 12 moves in extension and retraction relative to the housing 11, the ear cap 13 will move along with the sound outlet 12, that is, it will move in extension and retraction relative to the housing 11. During the movement, the housing 11 is relatively hard and forms a certain contact friction with the ear cap 13, which will cause the end face of the ear cap 13 away from the sound hole 131 to be deformed by force. When the end face of the ear cap 13 is deformed and bulges, it will also make the movement of the sound outlet 12 difficult.

[0074] Therefore, by setting up a bracket 15, which is made of hard plastic or hard rubber and has a certain degree of rigidity, while the ear cap 13 is made of a relatively soft material such as silicone, the bracket 15 is ring-shaped and connected to the end of the ear cap 13 away from the sound hole 131. This allows the bracket 15 to provide support for the ear cap 13 between the ear cap 13 and the sound outlet 12 during its extension and retraction, preventing deformation of the ear cap 13 and improving the smoothness of the extension and retraction of the sound outlet 12. This results in a better listening experience and enhances the user experience. The bracket 15 can be connected and fixed to the inner wall of the ear cap 13 through secondary injection molding, or it can be integrally formed with the ear cap 13. Of course, the bracket 15 can also be connected to the outer wall of the sound outlet 12; this application does not limit this.

[0075] In practical use, after adjusting the extension and retraction of the sound outlet 12, the user desires that the sound outlet 12 remain in the adjusted position to adapt to various movement scenarios. This can be achieved through the friction between the sound outlet 12 and the housing 11. In one implementation, the sound outlet 12 and the housing 11 can be an interference fit, and the contact surfaces of the two can undergo a certain degree of deformation and compression. For example, the contact surfaces of the sound outlet 12 and the housing 11 can be made of soft rubber material. In another implementation, a sealing structure can be provided between the sound outlet 12 and the housing 11. That is, the sealing structure itself generates elastic deformation and resistance to prevent the sound outlet 12 from becoming loose relative to the housing 11. The sealing structure can be a damping ring, damping sheet, or other structure made of silicone material.

[0076] Specifically, please refer to Figure 4 The sealing structure of the open-back earphone 1 can be a sealing ring 16, which is made of a damping material such as silicone or rubber. The sealing ring 16 is disposed on one of the housing 11 and the sound outlet 12, and abuts against the other of the housing 11 and the sound outlet 12. In one embodiment of this application, the sound outlet 12 is nested inside the housing 11, and the sealing ring 16 is sandwiched between the outer wall surfaces of the housing 11 and the sound outlet 12. A fixing groove may be provided on the sound outlet 12 or the housing 11, and the sealing ring 16 is embedded and fixed in the fixing groove. The sealing ring 16 also helps to reduce the resonance amplitude of the sound outlet 12 and the housing 11 during sound transmission due to the mechanical structure, thereby preventing the structure from being damaged due to the vibration stress reaching its limit. In addition, the sealing ring 16 is sandwiched between the outer wall surfaces of the housing 11 and the sound outlet 12, which can also seal the gap between the outer wall surfaces of the housing 11 and the sound outlet 12 caused by relative movement, preventing foreign objects from entering the interior of the open-back headphone 1, affecting the normal operation of the open-back headphone 1, and extending the service life of the open-back headphone 1.

[0077] Please see Figure 7 In some embodiments of this application, the housing 11 has a receiving cavity 112, the sound outlet 12 has a cylindrical structure and is partially located within the receiving cavity 112, and the sound outlet 121 communicates with the receiving cavity 112. The electric drive assembly 30 is located within the receiving cavity 112 and partially extends into the inner side of the sound outlet 12 and is drively connected to the sound outlet 12. With this configuration, the sound output effect of the open-back earphone 1 can be improved by setting the receiving cavity 112. At the same time, the electric drive assembly 30 partially extends into the inner side of the sound outlet 12, which can reuse the space inside the sound outlet 12, thereby making the electric drive assembly 30 and the sound outlet 12 more compact, and thus reducing the size of the open-back earphone 1.

[0078] Please see Figure 1A sound outlet 12 is mounted on one end of the housing 11 along its length, and the extension direction of the sound outlet 12 forms an angle with the length direction of the housing 11. This design allows the user to easily adjust the sound outlet 12's extension and retraction when the open-back earphone 1 is worn on the user's ear. Specifically, the sound outlet 12 can be automatically adjusted to extend into the user's ear canal or automatically retract to outside the user's ear canal, i.e., at a distance from the user's ear canal opening. (See attached image) Figure 1 In the diagram, S1 is the extension direction of the sound outlet 12, and S2 is the length direction of the housing 11.

[0079] Preferably, the angle between the extension direction of the sound outlet 12 and the length direction of the housing 11 is α, where 25°≤α≤45°. This setting provides better space for the movement of the sound outlet 12, thus facilitating user operation. α can be 25°, 26°, 30°, 37°, 45°, etc.

[0080] In some embodiments of this application, the housing 11 includes a contact surface 115 that contacts the inner surface of the user's ear concha, and the extension direction of the sound outlet 12 is set at an angle to the contact surface 115. This configuration ensures that the contact surface 115 contacts the inner surface of the user's ear concha when worn, increasing the contact area between the contact surface 115 and the skin of the concha, thereby improving the wearing stability of the open-back headphones 1 and reducing the risk of loosening during exercise. It should be noted that in this embodiment, the contact surface 115 may be entirely flush with the inner surface of the concha, or the contact surface 115 may have minor gaps due to angular deviations or differences in curvature with the skin of the concha.

[0081] In other embodiments of this application, please refer to Figure 9 The housing 11 includes a first housing portion 113 and a second housing portion 114 connected to each other. The first housing portion 113 has a wearing portion 20 connected to its two ends along its length, and the second housing portion 114 has a sound outlet 12 installed at the end of the second housing portion 114 away from the first housing portion 113. The length direction of the second housing portion 114 forms an angle with the length direction of the first housing portion 113, and the extension direction of the sound outlet 12 also forms an angle with the length direction of the first housing portion 113. This configuration allows the housing 11 to better contact the concha and the lower part of the auricle, avoiding pressure on the tragus or earlobe. The angle between the length direction of the second housing portion 114 and the length direction of the first housing portion 113 allows the first housing portion 113 to bypass the auricular protrusion, distributing pressure to the concha and the outer side of the auricle, reducing discomfort during prolonged wear. Figure 9 In the diagram, S1 is the extension direction of the sound outlet 12, and S3 is the length direction of the housing 11.

[0082] It should be noted that the extension direction of the sound outlet 12 can be parallel to or at an angle to the length direction of the second housing portion 114; no specific limitation is made here. Preferably, the speaker assembly is disposed inside the second housing portion 114, and the electric drive assembly 30 is installed inside the first housing portion 113. This reduces the length of the second housing portion 114 while making full use of the space inside the first housing portion 113, thereby reducing the size of the open-back headphone 1.

[0083] Preferably, the angle between the extension direction of the sound outlet 12 and the length direction of the first housing portion 113 is β, where 30°≤β≤50°. This setting can further improve the wearing comfort of the open-back headphones 1. β can be 30°, 31°, 35°, 40°, 43°, 45°, 50°, etc.

[0084] 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.

[0085] 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 technical features indicated. 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 at least two, such as two, three, etc., unless otherwise explicitly specified.

[0086] 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.

[0087] 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.

[0088] 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 open-back headphone, characterized in that, include: Wearing part ， Used to place the open-back headphones on the user's ears; The sound-emitting part includes a housing and a sound outlet. The housing is connected to the wearing part, and the sound outlet is provided with a sound outlet hole. The sound outlet is movably connected to the housing, and the sound outlet can extend and retract relative to the housing. as well as An electric drive assembly is used to drive the sound outlet to extend and retract relative to the housing, so that when the open-back headphones are worn, the sound outlet can switch between an open-back wearing position and an in-ear wearing position; in the open-back wearing position, the sound outlet is spaced apart from the user's ear canal opening, and in the in-ear wearing position, the sound outlet extends into the user's ear canal opening; as well as A control board, electrically connected to the electric drive assembly, is configured to receive a user's trigger command and control the electric drive assembly to operate based on the trigger command, thereby driving the sound outlet to move telescopically relative to the housing.

2. The open-back headphone as described in claim 1, characterized in that, It also includes touch buttons, which are disposed on the open-back headphones and electrically connected to the control board; the trigger command includes a button trigger command; The control board is configured to control the operation of the electric drive component based on the button trigger command when it receives the user's trigger command as the button trigger command.

3. The open-back headphone as described in claim 2, characterized in that, The touch button includes a first touch area and a second touch area. The button trigger command includes an open command and an in-ear command. The first touch area is configured to be triggered by the user to generate the open command, and the second touch area is configured to be triggered by the user to generate the in-ear command. The control board is configured to, upon receiving a user's trigger command that is the open-fit command, control the electric drive assembly to move the sound outlet to the open-fit position based on the open-fit command. The control board is configured to, upon receiving a user's trigger command that is an in-ear command, control the electric drive component to move the sound outlet to the in-ear wearing position based on the in-ear command.

4. The open-back headphone as described in claim 1, characterized in that, It also includes a sound pickup component, which is electrically connected to the control board and is used to pick up ambient noise; the trigger command includes an automatic switching command; The control board is configured to control the electric drive component to operate based on the comparison result of the ambient noise picked up by the sound pickup component and a preset value when the user's trigger command is the automatic switching command.

5. The open-back headphone as described in claim 4, characterized in that, The control board is configured to, upon receiving the user's trigger command as the automatic switching command, control the electric drive component to switch the sound outlet to the in-ear wearing position based on the fact that the external ambient noise picked up by the sound pickup component is higher than the preset value; or Based on the fact that the external ambient noise picked up by the sound pickup component is lower than the preset value, the electric drive component is controlled to drive the sound outlet to switch to the open wearing position.

6. The open-back headphone as described in claim 4, characterized in that, The sound pickup assembly includes multiple microphones, all of which are electrically connected to the control board.

7. The open-back headphone as described in any one of claims 1-6, characterized in that, It also includes a detection component, which is electrically connected to the control board and is used to detect the position information of the sound outlet.

8. The open-back headphone as described in claim 7, characterized in that, The control board is configured to receive the detection signal from the detection component, and based on the detection signal and the trigger command, determine that the sound outlet has moved to a designated position, and control the electric drive component to stop operating; or Based on the detection signal and the trigger command, if it is determined that the sound outlet has not moved to the designated position, the electric drive component is controlled to continue operating.

9. The open-back headphone as described in claim 7, characterized in that, The detection assembly includes a test piece and at least two Hall sensors. The test piece is mounted on the sound outlet, and the Hall sensors are mounted on the housing. The Hall sensors are electrically connected to the control board, and at least two Hall sensors are arranged at intervals along the extension direction of the sound outlet. The control board is configured to receive detection signals from at least two of the Hall sensors, determine the position information of the sound outlet based on the Hall sensor detection signals, and control the operation of the electric drive assembly to adjust the position of the sound outlet.

10. The open-back headphone as described in claim 1, characterized in that, The electric drive assembly includes: The rack is fixedly connected to the sound outlet. Gear, meshing with the rack; and The motor is electrically connected to the control board, and the output end of the motor is connected to the gear transmission to drive the gear to rotate and drive the rack to move along the extension direction of the sound outlet.

11. The open-back headphone as described in claim 1, characterized in that, The electric drive assembly includes: A piezoelectric vibrator, electrically connected to the control board; and A friction block is disposed at the output end of the piezoelectric vibrator and makes transmission contact with the sound outlet, so that the piezoelectric vibrator drives the friction block to move, thereby causing the sound outlet to move along the extension direction of the sound outlet.

12. The open-back headphone as described in claim 11, characterized in that, The electric drive assembly also includes: The clamping member has one end fixedly connected to the sound outlet and the other end provided with an elastic clamping part, which clamps the outer peripheral wall of the friction block.

13. The open-back headphone as described in claim 12, characterized in that, The friction block is made of carbon fiber material.

14. The open-back headphone as described in claim 1, characterized in that, The electric drive assembly includes: Magnetic component, fixedly connected to the sound outlet; and An electromagnetic coil, electrically connected to the control board, is used to drive the magnetic component to move along the extension direction of the sound outlet.

15. The open-back headphone as described in claim 1, characterized in that, The inner wall of the housing and one of the sound outlets are provided with a guide groove, and the other of the inner wall of the housing and the sound outlets are provided with a guide block. The guide groove extends along the extension direction of the sound outlet, and the guide block is slidably disposed in the guide groove.

16. The open-back headphone as described in claim 1, characterized in that, The sound-producing part also includes an ear cap, which is fitted over the outside of the sound outlet and has a sound-producing hole that communicates with the sound outlet.

17. The open-back headphone as claimed in claim 1, characterized in that, The sound outlet is installed at one end of the housing along its length, and the extension direction of the sound outlet is set at an angle to the length direction of the housing.

18. The open-back headphone as described in claim 17, characterized in that, The angle between the extension direction of the sound outlet and the length direction of the housing is α, where 25°≤α≤45°.

19. The open-back headphone as described in claim 1, characterized in that, The housing includes a first housing portion and a second housing portion connected to each other. The first housing portion is connected to the wearing portion and the second housing portion at both ends along its length direction, respectively. The sound outlet is installed at the end of the second housing portion away from the first housing portion. The extension direction of the sound outlet is set at an angle to the length direction of the first housing portion.

20. The open-back headphone as described in claim 19, characterized in that, The angle between the extension direction of the sound outlet and the length direction of the first housing portion is β, where 30°≤β≤50°.

21. The open-back headphone as described in claim 1, characterized in that, The wearing part includes a housing and a connecting bridge, the connecting bridge connecting the housing and the sound-emitting part, and the housing and the sound-emitting part are disposed opposite to each other to clip the open-back headphones onto the user's ears; or The wearing part includes a housing and an ear hook, the ear hook connecting the housing and the sound-emitting part, for hanging the open-back headphones on the user's ears.

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