Open type earphone

Abstract

The utility model discloses an open type earphone, which comprises a wearing part, a sound production part, a first loudspeaker and a second loudspeaker, and is characterized in that the wearing part is used for wearing the open type earphone on an ear of a user; the sound production part comprises a shell and a sound outlet nozzle, the shell is connected with the wearing part, the sound outlet nozzle is provided with a first sound outlet hole, the sound outlet nozzle is movably connected with the shell, and the sound outlet nozzle can telescopically move relative to the shell, so that the distance between the first sound outlet hole and an ear canal opening of a user can be adjusted when the open type earphone is worn; the first loudspeaker is arranged in the sound outlet nozzle; the second loudspeaker is arranged in the shell. The open earphone provided by the embodiment of the utility model can realize a better listening effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of acoustic devices, in particular to an open earphone. BACKGROUND

[0002] The open earphone does not completely isolate external sound when in use, and the wearer can hear the sound of the surrounding environment, such as the sound of a car driving, the calling sound of others, etc. This feature is very important when outdoor sports (such as running, cycling) or walking on the street, which can effectively avoid accidents caused by not hearing external sound, and improve personal safety protection when in use. Since the in-ear earphone directly enters the ear canal, it can better isolate external noise, so that the sound is more directly transmitted into the ear, and therefore has an advantage in the detail restoration and low frequency performance of sound quality.

[0003] In real life, since consumers often switch between different life scenes, there is a high demand for dual-mode earphones that have the advantages of both open earphones and in-ear earphones. CONTENT OF THE INVENTION

[0004] The open earphone provided by the embodiment of the present application aims to provide an open earphone suitable for use in different scenes by users and having excellent sound quality effect.

[0005] The open earphone provided by the embodiment of the present application includes a wearing part, a sound generating part, a first loudspeaker and a second loudspeaker. The wearing part is used to wear the open earphone on the ear of a user. The sound generating part includes a shell and a sound outlet. The shell is connected with the wearing part, and the sound outlet is provided with a first sound outlet hole. The sound outlet is movably connected with the shell, and the sound outlet is telescopically movable relative to the shell, so that the distance between the first sound outlet hole and the ear canal opening of the user can be adjusted when the open earphone is worn. The first loudspeaker is arranged in the sound outlet, and the second loudspeaker is arranged in the shell.

[0006] Based on the open earphone of the present application, the sound outlet is movably connected with the shell, so that the sound outlet can telescopically move relative to the shell, and the distance between the first sound outlet hole and the ear canal opening of the user can be adjusted when the open earphone is worn. In this way, the open earphone of the present application can meet the open wearing use, and can also meet the different customer's adjustment of the position of the sound outlet according to their ear size to obtain the best wearing and listening effect when used by different users. In addition, the design that the sound outlet can telescopically move relative to the shell enables the open earphone of the present application to also meet the in-ear wearing demand, so that a better sound insulation effect can be achieved.

[0007] In addition, the open earphone of the present application is respectively provided with a first loudspeaker in the sound outlet nozzle and a second loudspeaker in the shell, and the first loudspeaker and the second loudspeaker can be configured to be responsible for different frequency bands, for example, the first loudspeaker is responsible for high frequency, and the second loudspeaker is responsible for medium frequency and low frequency. Since high frequency sound has a shorter wavelength and higher directivity, it is easy to concentrate in a short distance. The first loudspeaker responsible for high frequency is placed in the sound outlet nozzle, close to the first sound outlet hole, which can ensure that the high frequency sound has better directivity and concentration during transmission, reduces the diffusion and attenuation of high frequency sound in the transmission path, and thus improves the clarity and detail performance of high frequency sound. Low frequency and medium frequency sound has a longer wavelength and stronger diffusion, which can be transmitted in a wider area. The second loudspeaker responsible for low frequency and medium frequency is arranged in the shell, which can use the internal space of the shell as a resonance cavity to enhance the resonance effect of low frequency and medium frequency sound and improve the fullness and level of the sound. Therefore, the arrangement of the present embodiment can better utilize the advantages of acoustic principles and structure to improve the sound quality performance of the open earphone. BRIEF DESCRIPTION OF DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0009] Figure 1 The structure schematic diagram of the open earphone of an embodiment of the present application is shown in the figure.

[0010] Figure 2 The structure schematic diagram of the sound generating part and the ear cap of an embodiment of the present application is shown in the figure.

[0011] Figure 3 The partial structure sectional view of the sound generating part and the ear cap is shown in the figure. Figure 2

[0012] Figure 4 The partial structure sectional view of the sound outlet nozzle in the first position is shown in the figure. Figure 2

[0013] The partial structure sectional view of the sound outlet nozzle in the second position is shown in the figure. Figure 5 Figure 2 The exploded structure schematic diagram of part of the structure of the open earphone is shown in the figure.

[0014] Figure 6 Figure 1 The exploded structure schematic diagram of part of the structure of the open earphone is shown in the figure.

[0015] Figure 7 The exploded structure schematic diagram of part of the structure of the open earphone is shown in the figure. Figure 1 ​​​Another exploded structural schematic view of the open earphone part structure in the figure.

[0016] Explanation of reference numerals:

[0017] 100, open earphone; 10, sound generating part; 10a, sound outlet channel; 10b, coupling sound cavity; 11, shell; 11a, second sound outlet hole; 11b, guide groove; 11c, insertion groove; 11d, second sound cavity; 11e, mounting port; 111, shell body; 112, support; 12, sound outlet nozzle; 12a, first sound outlet hole; 12b, sound guide hole; 12c, first sound cavity; 121, guide block; 20, first loudspeaker; 20a, guide hole; 30, second loudspeaker; 40, adjusting mechanism; 41, piezoelectric vibrator; 42, friction piece; 50, detection assembly; 51, detection piece; 60, noise reduction microphone; 70, ear cap; 70a, sound generating hole; 80, wearing part; 90, sealing structure; 91, elastic sealing piece; 911, annular base body; 912, insertion leg.

[0018] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0019] To make the purpose, technical solutions and advantages of the present application more clear, the following will further describe the embodiments of the present application in connection with the drawings.

[0020] The following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0021] In the description of the present application, it should be understood that the terms "first", "second" and the like are used only for the purpose of description and should not be construed as indicating or implying relative importance. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" means two or more. "And / or", the association between the associated objects, means that there can be three kinds of relationships, for example, A and / or B, which can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. The character " / " generally represents that the associated objects before and after are a kind of "or" relationship.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] Headphones are a pair of transducers that receive electrical signals from a media player or receiver and convert them into audible sound waves using speakers placed close to the ears.

[0024] From the perspective of the overall development of the audio industry, wireless headphones are still a relatively new product. Wireless headphones utilize wireless communication technologies such as Bluetooth to achieve wire-free connectivity, allowing users to transmit audio wirelessly to mobile phones or other devices. The main advantages of wireless headphones include the absence of wires, portability, and ease of use.

[0025] There are many types of wireless headphones. For some open-back headphones that can be worn directly on the user's ears, these types of open-back 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.

[0026] However, currently, for open-back headphones that are worn directly on the user's ear, the sound output port is usually not adjustable after wearing. In reality, different users have different ear sizes, resulting in varying distances between the sound output port and the ear canal opening. For users with larger ears, the distance between the sound output port and the ear canal opening is too great, potentially causing insufficient sound volume reaching the ear canal and resulting in poor listening quality and overall unsatisfactory performance.

[0027] Furthermore, in related technologies, open-back headphones are equipped with only one speaker, a design that has significant shortcomings in sound quality performance. For example, in open-back wearing scenarios, users have higher requirements for the layering and richness of sound quality. A single speaker is difficult to meet users' expectations for sound quality in this scenario, especially in terms of the balance between bass and treble.

[0028] Therefore, this application proposes an open-back headphone 100 that can achieve a good listening experience for different users.

[0029] Please see Figure 1In the embodiment of the present application, the open earphone 100 comprises a sound generating part 10 and a wearing part 80 connected with the sound generating part 10, the sound generating part 10 is used to generate sound signals, and the wearing part 80 can cooperate with the sound generating part 10 to enable the open earphone 100 to be worn on the ear of a user. The wearing part 80 can be designed as an ear hook or an ear clip to ensure the stability of the wearing of the open earphone 100.

[0030] The open earphone 100 of the present application can be an ear-hanging earphone. Specifically, the wearing part 80 comprises an arc-shaped ear hook connected with the shell 11, which is used to be hung between the back of the ear and the head of the user. The ear hook is a flexible strip-shaped structure with deformation ability and is adapted to the contour shape of the ear, so as to adapt to different sizes of ears without the need to select a specific size according to the size of the ear, and is suitable for most people to use, with high universality.

[0031] The wearing part 80 can further comprise a battery compartment connected to the end of the ear hook away from the sound generating part 10. The battery compartment is provided with a battery for supplying power to the loudspeaker assembly. The battery and the loudspeaker are electrically connected through the lead wire arranged in the ear hook. The main control board in the open earphone 100 can be located in the sound generating part 10 or in the battery compartment. Such a layout form is comfortable and stable during wearing because the battery compartment is also located between the back of the ear and the head of the user during wearing, and the battery compartment has a certain weight, so that the gravity distribution of the whole open earphone 100 on the ear is more balanced.

[0032] Please refer to Figures 1 to 3, the sound production part 10 comprises a shell 11 and a sound outlet nozzle 12, the shell 11 is connected with the wearing part 80, the sound outlet nozzle 12 is provided with a first sound outlet hole 12a, the first sound outlet hole 12a is located at the front end of the sound outlet nozzle 12, here the front end refers to the end part towards the ear canal opening of the user, the sound outlet nozzle 12 is movably connected with the shell 11, and the sound outlet nozzle 12 is telescopically movable relative to the shell 11, so that the open earphone 100 can adjust the distance between the first sound outlet hole 12a and the ear canal opening of the user when being worn. It should be noted that the sound outlet nozzle 12 is telescopically movable relative to the shell 11 and has a first position, a second position and a third position between the first position and the second position. When the sound outlet nozzle 12 is in the first position, the first sound outlet hole 12a is spaced from the ear canal opening of the user, which can be understood as that the open earphone 100 is in an open wearing state at this time; when the sound outlet nozzle 12 is in the second position, the front end of the sound outlet nozzle 12, i.e. the part with the first sound outlet hole 12a, is inserted into the ear canal opening of the user, which can be understood as that the open earphone 100 is in an in-ear wearing state at this time; when the sound outlet nozzle 12 is in the third position, the first sound outlet hole 12a can or can not be spaced from the ear canal opening of the user, which can be understood as that the open earphone 100 is in a semi-in-ear wearing state at this time; which will be described in detail below.

[0033] Specifically, the sound outlet nozzle 12 is in the form of a cover body with an opening on one side, and the sound outlet nozzle 12 is slidably sleeved with the shell 11. When the shell 11 is a groove structure with an opening, the sound outlet nozzle 12 can be nested inside the shell 11, of course, the sound outlet nozzle 12 can also be sleeved outside the shell 11.

[0034] Among them, the way that the sound outlet nozzle 12 is telescopically movable relative to the shell 11 can be a manually adjustable way for the user, in one implementation, the sound outlet nozzle 12 is slidably sleeved with the shell 11, the user can easily slide the position of the sound outlet nozzle 12, and the sliding sleeve can use fewer parts, simplifying the manufacturing process. Further, to realize the positioning of the sound outlet nozzle 12, two limiting holes are arranged on the shell 11 along the telescopic direction of the sound outlet nozzle 12, and a resilient boss is arranged on the sound outlet nozzle 12. When the sound outlet nozzle 12 is slid to the appropriate position, the resilient boss can be clamped into the limiting hole, thereby realizing positioning.

[0035] In another embodiment, the sound outlet nozzle 12 is screw-connected with the shell 11, that is, the sound outlet nozzle 12 is provided with an internal thread, and the shell 11 is provided with an external thread, the sound outlet nozzle 12 is screw-connected with the shell 11, the screw connection can provide accurate adjustment, the user can adjust the distance between the first sound outlet hole 12a on the sound outlet nozzle 12 and the ear canal opening by rotating, and the distance between the first sound outlet hole 12a and the ear canal opening is shortened by extending the sound outlet nozzle 12.

[0036] In other embodiments, in order to achieve the telescopic movement of the sound outlet 12 relative to the shell 11, the sound outlet 12 and the shell 11 can also be connected by a telescopic component. For example, the sound outlet 12 can be connected to the shell 11 by a bellows structure. In this way, the telescopic movement of the sound outlet 12 relative to the shell 11 is achieved by the telescopic movement of the bellows structure.

[0037] Please refer to Figure 3 The open earphone 100 further comprises a first speaker 20 and a second speaker 30, which are core components of the open earphone 100 for converting electrical signals into sound signals. The open earphone 100 of the present application is an air conduction earphone, that is, the sound generated by the first speaker 20 and the second speaker 30 is transmitted through the air and enters the user's ear canal. In addition, the open earphone 100 of the present application can also be provided with a battery (not shown) and a circuit board (not shown). The battery and the circuit board can be arranged together with the first speaker 20 and the second speaker 30 in the sound generating part 10, of course, other arrangements are also possible, for example, the circuit board and the first speaker 20 and the second speaker 30 are located together in the sound generating part 10, while the battery is located in the wearing part 80, or the battery and the circuit board are located in the wearing part 80, or the main control board is located in the sound generating part 10 and the battery is located in the wearing part 80. These arrangements are all feasible. The battery can be in the form of a rechargeable lithium battery or a disposable dry battery, which is not limited in the present application.

[0038] Based on the open earphone 100 of the present application, the sound outlet 12 is movably connected to the shell 11, so that the sound outlet 12 can move telescopically relative to the shell 11, thereby adjusting the distance between the first sound outlet 12a and the user's ear canal opening. In this way, the open earphone 100 of the present application can not only meet the open wearing use, but also meet the different customer's needs for adjusting the position of the sound outlet 12 according to their own ear size to obtain the best wearing and listening effect. Moreover, the design that the sound outlet 12 can move telescopically relative to the shell 11 enables the open earphone 100 of the present application to also meet the demand for in-ear wearing, which can achieve a better sound insulation effect. Therefore, in actual use, when the distance between the first sound outlet 12a on the sound outlet 12 and the user's ear canal opening is too large, resulting in serious sound leakage, so that the user feels that the volume of the open earphone 100 is too small, the sound outlet 12 can be lengthened to shorten the distance between the first sound outlet 12a and the ear canal opening, thereby reducing sound leakage and increasing the volume. When the user feels that the position of the sound outlet 12 in the ear canal opening area is unreasonable and causes discomfort, the sound outlet 12 can be retracted to increase the distance between the sound outlet 12 and the ear canal opening. In this way, the open earphone 100 of the present application can be suitable for users with different sizes of ear parts and can achieve a better listening effect.

[0039] The first speaker 20 is arranged in the sound outlet nozzle 12, the sound outlet nozzle 12 can protect the first speaker 20, the first speaker 20 sounds towards the first sound outlet hole 12a, the first sound outlet hole can be in the form of an array of multiple micro-holes, the first speaker 20 can be fixed in the sound outlet nozzle 12, that is, during the extension and retraction movement of the sound outlet nozzle 12, the sound outlet nozzle 12 can drive the first speaker 20 to move, the position of the first speaker 20 in the sound outlet nozzle 12 will not change, and it can be understood that a front sound cavity is formed between the first speaker 20 and part of the inner wall of the sound outlet nozzle 12, which serves as a front cavity for the first speaker 20. The front cavity of the first speaker 20 is in communication with the first sound outlet hole 12a.

[0040] Due to the comfort of the sound outlet nozzle 12 into the ear, the volume of the first speaker 20 is usually set to be small, which will cause the sound quality of the open earphone 100 to be poor and the loudness to be small when the sound outlet nozzle 12 is in the retracted state, which cannot meet the user's needs.

[0041] To solve the above problems, the embodiment also provides a second speaker 30, which is arranged in the shell 11, and the shell 11 can protect the second speaker 30. It can be understood that compared with the first speaker 20, the second speaker 30 is farther away from the first sound outlet hole 12a. In the case of relatively retracted sound outlet nozzle 12, the first speaker 20 and the second speaker 30 can be configured to be responsible for different frequency bands, such as the first speaker 20 being responsible for high frequency and the second speaker 30 being responsible for medium frequency and low frequency. Since high-frequency sound has a shorter wavelength and higher directivity, it is easy to concentrate in a short distance. Placing the first speaker 20 responsible for high frequency in the sound outlet nozzle 12 close to the first sound outlet hole 12a can ensure that the high-frequency sound has better directivity and concentration during transmission, reducing the diffusion and attenuation of high-frequency sound in the transmission path, thereby improving the clarity and detail performance of high-frequency sound. Low-frequency and medium-frequency sound has a longer wavelength and stronger diffusion, which can propagate in a wider area. The second speaker 30 responsible for low-frequency and medium-frequency sound is arranged in the shell 11, which can use the internal space of the shell 11 as a resonance cavity to enhance the resonance effect of low-frequency and medium-frequency sound and improve the fullness and level of the sound. Therefore, the arrangement of the embodiment can better utilize the advantages of acoustic principles and structure to improve the sound quality performance of the open earphone 100.

[0042] Please continue to refer to Figure 3To realize the automatic extension and retraction of the sound outlet 12 and reduce the operation burden of the user during wearing, in some embodiments, the open earphone 100 further comprises an adjusting mechanism 40, which is in transmission connection with the sound outlet 12. The adjusting mechanism 40 is configured to drive the sound outlet 12 to move between the first position and the second position, so that the distance between the sound hole and the user's ear canal opening can be adjusted when the open earphone 100 is worn.

[0043] There are many types of adjusting mechanisms 40. The adjusting mechanism 40 can drive the sound outlet 12 to move by magnetic force, or the adjusting mechanism 40 can drive the sound outlet 12 to move by motor. The installation position of the adjusting mechanism 40 can be various. The adjusting mechanism 40 can be installed on the wearing part 80, or the adjusting mechanism 40 can be installed in the sound generating part 10. Preferably, the adjusting mechanism 40 is installed in the sound generating part 10, so as to shorten the distance between the adjusting mechanism 40 and the sound outlet 12, and simplify the structure of the adjusting mechanism 40.

[0044] There are many ways for the user to control the operation of the adjusting mechanism 40. For example, the open earphone 100 is provided with a control button which partially protrudes from the shell 11, and the user can control the operation of the adjusting mechanism 40 through the control button. For another example, the circuit board is electrically connected with the adjusting mechanism 40, and the circuit board can be connected with the user's mobile phone through Bluetooth. The user sends a signal to the circuit board through the mobile phone to control the operation of the adjusting mechanism 40. For another example, the open earphone 100 is provided with a pressure sensor, and the user controls the operation of the adjusting mechanism 40 by pressing the pressure sensor. For another example, the open earphone 100 is equipped with a remote controller to directly control the operation of the adjusting mechanism 40. For another example, the circuit board is provided with a voice control module and is electrically connected with the adjusting mechanism 40. The voice control module receives the voice instruction of the user to control the operation of the adjusting mechanism 40. Here, they are not listed one by one.

[0045] Please refer to Figure 4 and Figure 5 . The adjusting mechanism 40 is configured to drive the sound outlet 12 to move between the first position (such as Figure 4 ) and the second position (such as Figure 5extends out of the shell 11, and the sound outlet nozzle 12 abuts against the ear canal opening of the user. It should be noted that the first position and the second position are the extreme states of the sound outlet nozzle 12 during adjustment, and in actual use, the user can also adjust the sound outlet nozzle 12 to a third position between the first position and the second position according to the user's own situation. In this way, when the sound outlet nozzle 12 is in the second position, the sound outlet nozzle 12 can abut against the ear canal opening of the user, so as to isolate a part of the external sound and play a noise reduction effect, and the open earphone 100 can switch between the in-ear wearing mode and the open wearing mode, greatly enriching the use scenarios of the open earphone 100 and making the open earphone 100 more convenient to use.

[0046] When the sound outlet nozzle 12 is in the first position, the sound outlet nozzle 12 is located outside the ear canal opening of the user and the first sound outlet hole 12a is spaced from the ear canal opening, so that the open earphone 100 is switched to the open wearing mode, which can allow external environmental sound to enter and naturally blend with the sound played by the open earphone 100, provide a more open and transparent listening experience, and reduce the feeling of oppression during long-time listening.

[0047] Further, when the sound outlet nozzle 12 is in the second position, the sound outlet nozzle 12 blocks the ear canal opening of the user. In this way, when the sound outlet nozzle 12 is in the second position, the open earphone 100 can effectively isolate external noise, enjoy clear sound quality without too high volume, protect hearing, and create a more immersive listening experience for the user, such as providing excellent bass response and detail resolution, meeting the needs of music lovers.

[0048] When the sound outlet nozzle 12 is in the third position, the user can adjust the sound outlet nozzle 12 to the third position according to the user's own needs and wearing comfort. In the third position, the sound outlet nozzle 12 neither completely abuts against the ear canal opening nor completely locates outside the ear canal opening, but is in an intermediate state. This design allows the user to flexibly adjust the position of the sound outlet nozzle 12 according to different use scenarios and preferences to obtain a better listening experience and better wearing comfort.

[0049] Please refer to Figure 7In order to avoid the relative torsion of the sound outlet nozzle 12 relative to the shell 11 during the driving extension and retraction movement of the sound outlet nozzle 12, the guiding structure can be further arranged between the sound outlet nozzle 12 and the shell 11, and the guiding structure is used to prevent the torsion of the sound outlet nozzle 12 relative to the shell 11 in the circumferential direction during the extension and retraction movement. Specifically, referring to the drawings, the guiding structure can include a guide groove 11b and a guide block 121. The guide groove 11b can be arranged on the sound outlet nozzle 12 or on the shell 11 and extends in the extension and retraction direction of the sound outlet nozzle 12. The guide block 121 slides along the guide groove 11b, that is, the arrangement positions of the guide groove 11b and the guide block 121 of the present application can be interchanged between the sound outlet nozzle 12 and the shell 11. Through the arrangement of the guiding structure, the relative torsion between the sound outlet nozzle 12 and the shell 11 is avoided, and in the case that the cross-sectional shape of the sound outlet nozzle 12 and the shell 11 is designed as a non-circular shape, the interference between the sound outlet nozzle 12 and the shell 11 can be effectively avoided, and the deformation of the structure of the sound outlet nozzle 12 can be avoided.

[0050] Of course, in other structural forms, the guiding structure can not be arranged, but the shape arrangement between the shell 11 and the sound outlet nozzle 12 can be achieved. For example, the cross-sectional contour shapes of the shell 11 and the sound outlet nozzle 12 can be designed as a racetrack type or a polygon, so that the shell 11 and the sound outlet nozzle 12 are arranged with mutually sliding planes, thereby avoiding the torsion of the sound outlet nozzle 12 relative to the shell 11 during the pulling process.

[0051] Please continue to refer to Figure 7 Specifically, in some embodiments, the adjusting mechanism 40 includes a piezoelectric vibrator 41 and a friction piece 42. The friction piece 42 is arranged on the output end of the piezoelectric vibrator 41 and is in driving contact with the sound outlet nozzle 12, so that the piezoelectric vibrator 41 drives the friction piece 42 to move and drives the sound outlet nozzle 12 to move in the extension and retraction direction. It should be noted that the ultrasonic vibration generated by the piezoelectric effect causes the friction piece 42 fixed on the piezoelectric vibrator 41 to produce synchronous high-frequency vibration. This vibration can drive the sound outlet nozzle 12 to move linearly through the friction between the friction piece 42 and the sound outlet nozzle 12. By adjusting the driving waveform, the sound outlet nozzle 12 can be moved in the retraction direction. Such a structure has the advantages of simple structure and fewer components.

[0052] The driving contact between the friction piece 42 and the sound outlet nozzle 12 can be achieved by arranging a clamping portion on the sound outlet nozzle 12 to clamp the friction piece 42, or by electromagnetic attraction to tightly contact the sound outlet nozzle 12 and the friction piece 42, or by the gravity of the sound outlet nozzle 12 pressing on the friction piece 42. Here, they will not be listed one by one.

[0053] To realize more compact arrangement of the friction member 42 in the sound production part 10, the first loudspeaker 20 has a guide hole 20a, and part of the friction member 42 can be arranged in the guide hole 20a, so that the space in the sound production part 10 can be used more efficiently. This design reduces the mutual interference between components, making the overall structure of the open earphone 100 more compact and smaller in size, and facilitating carrying and wearing.

[0054] Preferably, the adjusting mechanism 40 further comprises a clamping member, one end of which is fixedly connected with the sound outlet 12, and the other end of which is provided with an elastic clamping portion clamping the outer circumferential wall of the friction member 42. In this way, the elastic clamping portion clamping the friction member 42 can make the transmission contact between the friction member 42 and the sound outlet 12 more stable, so that the adjusting mechanism 40 can better drive the sound outlet 12 to move.

[0055] Further, the friction member 42 is made of carbon fiber material. Carbon fiber material has high hardness. In the piezoelectric ceramic driven ultrasonic linear motion system, the friction member 42 needs to frequently contact and rub with the sliding block. The high hardness of carbon fiber enables it to withstand such friction and reduce its own wear. For example, during long-term linear motion, compared with some soft materials, the shape and size of the friction member 42 made of carbon fiber material can better remain stable, thereby maintaining stable friction performance. Its good wear resistance can prolong the service life of the friction member 42. At the same time, using the carbon fiber friction member 42 can reduce the frequency of replacing parts and reduce maintenance costs.

[0056] Please refer to Figure 5 and Figure 7 In some embodiments, the friction member 42 is a carbon rod, which is in the shape of a long strip and extends along the length direction of the sound outlet 12. The cross-sectional diameter of the carbon rod is a, and the hole diameter of the guide hole 20a is b, which satisfies: (0.5mm+a)≤b≤(1.5mm+a), that is, the hole diameter of the guide hole 20a is greater than the cross-sectional diameter of the carbon rod by 0.5mm-1.5mm, and there is a suitable gap between the carbon rod and the guide hole 20a. This gap cannot be too tight to avoid excessive friction between the carbon rod and the hole wall of the guide hole 20a. If the gap is too small, it will increase the resistance of the carbon rod when it moves, making it difficult to slide smoothly, and even may cause jamming phenomenon. Excessive friction will accelerate the wear of the carbon rod. If the gap is too small, for example, less than 0.5mm, it may also cause the sound outlet 12 to fail to work normally. If the gap is too large, for example, greater than 1.5mm, since the adjusting mechanism 40 needs to transmit force through the carbon rod to move the sound outlet 12. If the gap is too large, the force transmission may be affected, causing the sound outlet 12 to move or stop in an unexpected manner.

[0057] In this embodiment, the shell 11 is sleeved outside the sound outlet nozzle 12, and the control board is arranged in the shell. In the second position, the control board controls the first loudspeaker 20 to work alone, that is, at this time, the first loudspeaker 20 is responsible for the full frequency band. Since in the second position, the first sound hole 12a is located at the front end of the sound outlet nozzle 12, the sound outlet nozzle 12 is stretched out, the part of the sound outlet nozzle 12 with the first sound hole 12a is inserted into the ear canal, so that the sound can be more directly transmitted into the ear canal. The space in the ear canal is relatively closed, and the reflection and standing wave effect of the sound will be significantly reduced, reducing the loss and diffusion of sound in the propagation process, thereby providing clearer and more concentrated sound quality performance. The clarity and detail performance of high-frequency sound are more outstanding, and the transmission efficiency of medium and low-frequency sound can also be ensured.

[0058] On the basis of meeting the optimization of sound quality performance, at this time, the second loudspeaker 30 does not work, which can reduce the energy consumption of the open earphone 100 in the second position. The power required to drive only one loudspeaker is obviously lower than that to drive two loudspeakers at the same time, and the endurance time of the open earphone 100 can be prolonged.

[0059] In the first position, at this time, the first sound hole 12a is spaced from the user's ear canal. Since the propagation path of sound in space is more complex, reflection and standing wave effect are easy to occur. In this scenario, a single loudspeaker is difficult to meet the sound quality requirements of high frequency and medium and low frequency at the same time. Therefore, the control board is used to control the first loudspeaker 20 and the second loudspeaker 30 to work at the same time when the sound outlet nozzle 12 is in the first position. The first loudspeaker 20 and the second loudspeaker 30 can be configured to be responsible for different frequency bands, such as the first loudspeaker 20 being responsible for high frequency, and the second loudspeaker 30 being responsible for medium frequency and low frequency, which can provide more balanced sound quality performance, especially in the details and levels of high frequency and medium and low frequency. By assigning high frequency and medium and low frequency to different loudspeakers for processing, the advantages of each loudspeaker can be fully utilized. The first loudspeaker 20 is arranged in the sound outlet nozzle, and since the setting space is limited, the first loudspeaker 20 is usually small in size and can better process high-frequency signals; the second loudspeaker 30 is arranged in the shell 11, and its size can be set larger than that of the first loudspeaker 20, so that it can process medium and low frequency signals through a larger diaphragm and a stronger magnetic circuit system.

[0060] It should be noted that when the sound outlet nozzle 12 is in the third position, the working state of the first loudspeaker 20 and the second loudspeaker 30 can be the same as that when the sound outlet nozzle 12 is in the second position, or it can be appropriately adjusted according to the working data of the first loudspeaker 20 and the second loudspeaker 30 in the second position.

[0061] For example, Figure 5As shown, in order to make the open earphone 100 more effectively output mid-low frequency sound when in the first position, the sound outlet 12 and the shell 11 define a sound outlet channel 10a, which is a narrow slit channel. The narrow slit sound outlet channel can be regarded as a special acoustic duct. The acoustic duct can guide and adjust the sound, especially in the low frequency band. The duct can act as a resonance cavity, enhancing the propagation efficiency of low frequency sound. By reasonably designing the length and width of the narrow slit, it can be ensured that the low frequency sound will not be lost due to space limitation during propagation, but can be enhanced through resonance effect. The side wall of the sound outlet 12 is provided with a sound guide hole 12b, which is in communication with the space in the sound outlet 12. The peripheral wall of the shell 11 is provided with a second sound outlet hole 11a, which can be arranged in the form of a microporous array. The sound outlet channel 10a is in communication with the sound guide hole 12b and the second sound outlet hole 11a.

[0062] Among them, the second sound outlet hole 11a is arranged closer to the first sound outlet hole 12a than the sound guide hole 12b. The propagation path and time difference of the sound emitted by the two sound sources (the first speaker 20 and the second speaker 30) in the ear canal are smaller, that is, the high frequency sound (output by the first speaker 20 through the first sound outlet hole 12a) and the mid-low frequency sound (output by the second speaker 30 through the second sound outlet hole 11a) can be better integrated in the ear canal. This layout reduces the sound separation caused by too far distance between sound sources, and improves the overall and level of sound quality. This reduces the separation of sound when it reaches the ear canal, making the user feel that the sound is more natural and unified.

[0063] And the sound guide hole 12b is arranged closer to the second speaker 30 than the first speaker 20, which can ensure that the propagation path of the mid-low frequency sound from the second speaker 30 to the second sound outlet hole 11a is shorter and more direct. This design reduces the energy loss of sound during propagation, ensuring that the mid-low frequency sound can be more efficiently transmitted to the ear canal. The sound guide hole 12b close to the second speaker 30 can better cooperate with the sound generation characteristics of the second speaker 30, enhancing the resonance effect of low frequency sound. This resonance can enhance the depth and power of low frequency sound, making the sound quality more full. Reducing the interference of high frequency sound generated by the first speaker 20 on mid-low frequency sound, further improving the purity of bass.

[0064] As Figure 5 and Figure 6As shown, the housing 11 is provided with a mounting port 11e at one end away from the wearing part 80, and the sound outlet nozzle 12 is movably mounted at the mounting port 11e and can be telescopically moved relative to the housing 11. In order to reduce the leakage of the sound of the second loudspeaker 30 and improve the optimized acoustic performance, the open earphone 100 further comprises an elastic sealing piece 91 mounted at the mounting port 11e and elastically abutting against the outer wall of the sound outlet nozzle 12. Specifically, the elastic sealing piece 91 is annularly arranged and surrounds the outer periphery of the sound outlet nozzle 12 to elastically abut against the outer wall of the sound outlet nozzle 12. The elastic sealing piece 91 is used to seal the gap between the mounting port 11e of the housing 11 and the sound outlet nozzle 12. Such a sealing design can significantly reduce the problem of sound leakage from the front narrow gap and ensure that the sound of the second loudspeaker 30 is mainly conducted through the preset second sound outlet hole 11a. Moreover, through the sealing effect of the elastic sealing piece 91, the resonance effect of the sound outlet channel 10a (narrow gap channel) can be better utilized. The narrow gap channel, as a special acoustic conduit, can guide and adjust the sound, especially in the low frequency band. The conduit can act as a resonance cavity to enhance the propagation efficiency of low frequency sound.

[0065] Moreover, the design of the elastic sealing piece 91 enables the earphone to resist the invasion of liquid such as sweat and rain and dust when used outdoors or during exercise, thereby protecting the first loudspeaker 20 and the second loudspeaker 30 in the sound generating part 10 from damage and prolonging the service life of the earphone.

[0066] Specifically, the elastic sealing piece 91 is made of a material with high elasticity and flexibility, which can seal the gap between the housing 11 and the sound outlet nozzle 12 while not affecting the telescopic movement of the sound outlet nozzle 12 relative to the housing 11, thereby ensuring good sealing performance and effectively reducing the problem of sound leakage from the front narrow gap.

[0067] Specifically, the elastic sealing piece 91 comprises an annular base body 911 and a plurality of pins 912. The pins 912 are connected to one side of the annular base body 911 facing the housing 11. The end surface of the housing 11 away from the wearing part 80 is provided with a plurality of insertion grooves 11c, and the plurality of insertion grooves 11c are arranged one by one corresponding to the plurality of pins 912. The pins 912 can be inserted into the insertion grooves 11c to limit the elastic sealing piece 91. Moreover, the plurality of pins 912 are arranged at intervals along the circumference of the annular base body 911, so that the elastic sealing piece 91 is tightly connected to the housing 11 and the stability of the position of the elastic sealing piece 91 is ensured, which will not be displaced with the movement of the sound outlet nozzle 12.

[0068] The sound guide hole 12b is a sound conduction channel from the second speaker 30 to the second sound outlet 11a, which guides the sound of the second speaker 30 to the independent sound outlet channel 10a, avoiding direct interference with the first speaker 20 (high-frequency sound). In the first position, along the extension path of the sound outlet channel 10a, the sound outlet channel 10a communicates with the sound guide hole 12b and the second sound outlet 11a. Understandably, the second sound outlet 11a is the final output port for the sound of the second speaker 30.

[0069] As shown in Figure 3 , Figure 4 and Figure 5 , specifically, the first speaker 20 divides the space in the sound outlet nozzle 12 into a first sound cavity 12c located at the rear side of the first speaker 20, and the first speaker 20 can be arranged at a forward position in the sound outlet nozzle 12, while the second speaker 30 divides the space in the shell 11 into a second sound cavity 11d located at the front side of the second speaker 30, and the second speaker 30 can be arranged at a rear position in the shell 11. The first sound cavity 12c and the second sound cavity 11d communicate and jointly form a larger coupled sound cavity 10b. Because the coupled sound cavity 10b is larger, the diaphragm of the first speaker 20 will not excessively compress gas molecules when vibrating, thereby reducing the change in air pressure when the diaphragm of the first speaker 20 moves. The coupled sound cavity 10b provides a more stable vibration environment for the diaphragm of the first speaker 20, reducing vibration instability caused by changes in air pressure.

[0070] The coupled sound cavity 10b communicates with the sound guide hole 12b, which communicates with the second sound outlet 11a through the sound outlet channel 10a. When the sound outlet nozzle 12 is in the first position, the coupled sound cavity 10b provides a larger acoustic volume for the second speaker 30, increasing the volume of the low-frequency resonance and providing a resonance space for the mid-low frequency sound. This resonance space can enhance the propagation efficiency of low-frequency sound, increase the depth and intensity of low-frequency sound, and make the sound quality more full. The coupled sound cavity 10b separates the sound of the second speaker 30 from the sound of the first speaker 20, reducing the mutual interference between high-frequency and mid-low frequency sounds. This frequency separation design can better utilize the advantages of each speaker unit and improve the clarity and level of sound quality.

[0071] The coupled sound cavity 10b communicates with the second sound outlet 11a through the sound guide hole 12b, ensuring that the sound of the second speaker 30 can be more directly transmitted to the second sound outlet 11a, reducing the sense of separation when the sound reaches the ear canal, and making the user feel that the sound is more natural and unified.

[0072] When the sound outlet 12 is in the second position, the second speaker 30 does not work at this time, the second sound hole communicating with the coupling sound cavity 10b can be used as the pressure relief hole of the first speaker 20, which helps to balance the air pressure in the coupling sound cavity 10b, avoiding the influence on the vibration performance of the first speaker 20 due to the air pressure being too high. There is no need to specially set a pressure relief hole, which simplifies the structure of the open earphone 100.

[0073] Please continue to refer to, for example Figure 3 、 Figure 4 and Figure 5 , in order to further improve the listening effect of the user using the open earphone 100 of the embodiment, the open earphone 100 further comprises a noise reduction microphone 60, which can capture external noise and generate sound waves with opposite phases through the built-in noise reduction algorithm, thereby reducing the noise entering the ear and improving the clarity of listening to music and the voice quality of the call. The noise reduction microphone 60 can be located between the first speaker 20 and the first sound outlet 12a, which can more accurately capture the noise in the ear canal. In this position, the noise signal captured by the microphone and the signal emitted by the speaker can be more easily aligned in phase, which is very important for achieving effective active noise reduction.

[0074] Please continue to refer to, for example Figure 3 、 Figure 4 and Figure 5 , in order to ensure that the sound outlet 12 is in place between the first position and the second position, the open earphone 100 further comprises a detection assembly 50, which is electrically connected with the circuit board, and the detection assembly 50 is used to detect the position information of the extension and retraction movement of the sound outlet 12 relative to the shell 11, and send the above position information to the circuit board, that is, to detect the position of the sound outlet 12.

[0075] The circuit board is used to control the first speaker 20 and the second speaker 30 to work simultaneously when receiving the position information sent by the detection assembly 50 indicating that the sound outlet 12 is in the first position, and to control the first speaker 20 to work alone when receiving the position information sent by the detection assembly 50 indicating that the sound outlet 12 is in the second position. The received detection signal is processed by the circuit board, and the working mode of the speaker is adjusted according to the signal, which reflects the intelligence of the device. It can automatically adjust the audio output according to the actual use scene of the user, reducing the trouble of manual adjustment of the user

[0076] Specifically, at the first position, the circuit board can be used to distribute high-frequency signals to the first speaker 20, and distribute medium-frequency signals and low-frequency signals to the second speaker 30. Since high-frequency sound has higher energy and shorter wavelength, it is easy to quickly attenuate in an open space. Therefore, the high-frequency signal needs a more efficient propagation mode, and the high-frequency signal propagates through the first speaker 20, which can better maintain the clarity of high frequencies; the medium-frequency and low-frequency signals propagate through the second speaker 30, which can better diffuse in an open space. At the second position, the circuit board can be used to distribute high-frequency signals, medium-frequency signals, and low-frequency signals to the first speaker 20. At the second position, the sound outlet 12 is close to the ear canal, the sound propagation path is shorter, and the ear canal itself has a certain resonance effect on sound propagation. Distributing all frequency signals to the first speaker 20 can ensure the concentration and consistency of the sound, reduce sound leakage, and improve the concentration and immersion of the sound quality.

[0077] Among them, low frequency refers to 20Hz to 200Hz, medium frequency refers to 200Hz to 2kHz, and high frequency refers to 2kHz to 20kHz. In the design of the open earphone 100, according to the characteristics of these frequency bands, the first speaker 20 and the second speaker 30 are designed to specifically process signals of specific frequency bands to achieve the best sound quality performance of the open earphone 100 at the first position and the second position.

[0078] Specifically, the detection assembly includes a detection piece 51 and a trigger piece (not labeled), and the detection piece 51 is arranged on the shell 11 and the trigger piece is arranged on the sound outlet 12. Among them, the detection piece 51 can be one or two. In the case of one detection piece 51, the position of the sound outlet 12 can be determined by the signal change of the detection piece 51. In the case of two detection pieces 51, the two detection pieces 51 can be arranged corresponding to the first position and the second position respectively, so that the position of the sound outlet 12 can be determined by obtaining the signals of different detection pieces 51. For example, when the sound outlet 12 is at the first position, the corresponding detection piece 51 is coupled with the trigger piece to generate a detection signal, and when the sound outlet 12 is at the second position, the other corresponding detection piece 51 is coupled with the trigger piece to generate another detection signal.

[0079] The user can select the wearing state of the open earphone through the physical button arranged on the earphone or the virtual button on the control panel, so as to automatically adjust the extension amount of the sound outlet 12 relative to the shell 11. For example, when the user selects the in-ear wearing state, the sound outlet 12 will automatically extend to the preset second position relative to the shell 11; and when the user selects the open wearing state, the sound outlet 12 will automatically retract to the preset first position. In this process, the detection piece 51 and the trigger piece (not labeled) in the detection assembly 50 are used to feedback whether the extension position of the sound outlet 12 is in place, to ensure that the extension action of the sound outlet 12 is accurately completed.

[0080] It is understandable that the open earphone 100 also includes a digital signal processor (DSP) (not labeled) and a plurality of power amplifiers (PAs) (not labeled), and the DSP can be integrated into the main control chip of the earphone. The open earphone 100 is built-in with a first audio parameter and a second audio parameter, wherein the first audio parameter corresponds to the loudspeaker data of the first position, and the second audio parameter corresponds to the loudspeaker data of the second position.

[0081] In one configuration, the DSP is configured to adjust the working mode of the first loudspeaker 20 and the second loudspeaker 30 according to the position signal generated by the detection assembly 50. The PA is configured to amplify the audio signal to sufficient power to drive the corresponding loudspeaker to sound. After the DSP receives the detection signal of the first position, it is determined that the sound nozzle 12 is in the first position. The DSP divides the audio signal into high frequency and low frequency parts, and assigns them to the first loudspeaker 20 and the second loudspeaker 30 respectively. The corresponding PA amplifies the audio signal to sufficient power to drive the two loudspeakers to sound at the same time. After the DSP receives the detection signal of the second position, it is determined that the sound nozzle 12 is in the second position. The DSP assigns the audio signal to the first loudspeaker 20 through the second audio parameter, and amplifies the audio signal to sufficient power through the PA corresponding to the first loudspeaker 20 to drive the first loudspeaker 20 to sound.

[0082] In another configuration, the DSP directly obtains the selection made by the user through the physical button or the control panel, thereby adjusting the assigned audio signal to switch the working mode of the first loudspeaker 20 and the second loudspeaker 30. For example, when the DSP receives a signal that the user selects an in-ear wearing state, the sound nozzle 12 automatically extends to the second position, and the trigger piece and the detection piece feed back that the extension position is in place. The DSP then assigns the audio signal to the first loudspeaker 20 according to the second audio parameter, and amplifies the audio signal to sufficient power through the PA corresponding to the first loudspeaker 20 to drive the first loudspeaker 20 to sound. At this time, the DSP closes the audio signal of the second loudspeaker 30 through the control logic, ensuring that only the first loudspeaker 20 works to optimize the sound quality and noise reduction effect in the in-ear wearing state. Conversely, when the DSP receives a signal that the user selects an open wearing state, the sound nozzle 12 automatically retracts to the first position, and the DSP divides the audio signal into high frequency and low frequency parts according to the first audio parameter, and assigns them to the first loudspeaker 20 and the second loudspeaker 30 respectively. The corresponding PA amplifies the audio signal to sufficient power to drive the two loudspeakers to sound at the same time to provide the best sound quality performance in the open wearing state.

[0083] In one configuration, the trigger is fixedly connected to the sound outlet 12 or the first speaker 20. That is, the trigger can be a separate component that can be independently designed and optimized according to specific needs before being connected to the sound outlet 12 or the first speaker 20. If the trigger is damaged or needs to be upgraded, it can be replaced separately without replacing the entire sound outlet 12 or the speaker, thus reducing maintenance costs.

[0084] In another configuration, a portion of the sound outlet 12 or a portion of the first speaker 20 serves as a trigger, reducing the number of components inside the open-back headphone 100, optimizing space utilization, and making the headphones more compact. Furthermore, the trigger does not require separate connection to the sound outlet 12 or the first speaker 20, reducing connection points between components, enhancing the overall structural stability, and reducing the risk of malfunctions due to loose components.

[0085] Specifically, the first loudspeaker 20 includes an auxiliary system, a vibration system, and a magnetic circuit system. The vibration system is located within the auxiliary system and may include the housing and front shell of the first loudspeaker 20. The housing and front shell cooperate to form a protective frame. The vibration system is used to vibrate and generate sound. The vibration system includes a diaphragm and a voice coil. The voice coil can drive the diaphragm to vibrate. The magnetic circuit system is located within the auxiliary system and may include a frame, a magnet, and a washer. The magnetic circuit system can form a stable geomagnetic field. The voice coil will be subjected to electromagnetic force in the magnetic field, thereby driving the diaphragm to vibrate and generate sound. That is, the magnetic circuit system is used to provide driving force for the vibration system.

[0086] Furthermore, as can be seen from the above, the magnetic circuit system can be configured as the aforementioned triggering element, without the need for a separate triggering element.

[0087] like Figure 5 As shown, the housing 11 includes a housing body 111 and a support 112. The housing body 111 has a receiving cavity, and the support 112 is disposed in the receiving cavity. The two sides of the support 112 respectively form a receiving cavity and a sliding cavity. The second speaker 30 is housed in the receiving cavity. The detection element 51 is disposed on the side of the receiving cavity near the sliding cavity. The trigger element is connected to the detection element 51 and extends into the sliding cavity. The sound outlet 12 is slidably disposed in the sliding cavity. The detection element 51 is disposed on the support 112, so that the detection element 51 can monitor the position change of the sound outlet 12 in real time and ensure the accuracy of position detection.

[0088] Specifically, the trigger element can be a magnet, while the detection element 51 can be a Hall sensor. The trigger element (magnet) can be fixed to the sound outlet 12 and move with the extension and retraction of the sound outlet 12. The magnet generates a stable magnetic field. When the sound outlet 12 moves, the distance between the magnet and the Hall sensor changes, and the magnetic field strength changes accordingly. The Hall sensor is a magnetically sensitive element based on the Hall effect. When the magnetic field (generated by the magnet) approaches the Hall sensor, the charge carriers inside the sensor are subjected to the Lorentz force, resulting in a potential difference. This potential difference (Hall voltage) is proportional to the magnetic field strength, so the presence and strength change of the magnetic field can be sensed by detecting the change in the Hall voltage. Of course, in other forms, the detection component 50 can also be in the form of a microswitch or a photoelectric switch; this application does not limit this.

[0089] Please see Figure 6 and Figure 7 In some embodiments of this application, the ear cap 70 is detachably connected to the sound outlet 12 and is sleeved on the outside of the sound outlet 12. The ear cap 70 is provided with a sound outlet 70a that communicates with the first sound outlet 12a, and the ear cap 70 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 70 to select a more suitable ear cap 70. For example, when extending the sound outlet 12 to shorten the distance from the sound outlet 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 70 can be disassembled and reassembled to replace it with a larger ear cap 70. 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 70 can also be disassembled and reassembled to replace it with a smaller ear cap 70 to further increase the distance from the ear cap 70 to the ear canal opening, improve the adaptability of the open-back headphones 100, and give the user a more comfortable user experience. The above-mentioned configuration enables the open-back headphone 100 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.

[0090] Furthermore, the detachable connection between the ear cap 70 and the sound outlet 12 allows the ear cap 70 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 70. Additionally, the detachable connection between the ear cap 70 and the sound outlet 12 allows users to easily change to various sizes or types of ear caps 70. Users can choose the appropriate ear cap 70 according to their preferences or ear size, improving wearing comfort and making it convenient to change the ear cap 70 for different usage scenarios.

[0091] In actual use, after the user adjusts the sound outlet 12 to be telescopic, the user will want the sound outlet 12 to be kept at the adjusted position to adapt to various motion scenes. To this end, the friction between the sound outlet 12 and the shell 11 can be used. In an implementation, the sound outlet 12 and the shell 11 can be in interference fit, and the wall surfaces in contact with each other are extruded to have certain deformation, for example, the wall surfaces of the sound outlet 12 in contact with the shell 11 are made of soft rubber material. In another implementation, a sealing structure 90 can be arranged between the sound outlet 12 and the shell 11, that is, the sealing structure 90 itself is elastically deformed to generate resistance to prevent the sound outlet 12 from being loose relative to the shell 11. The sealing structure 90 can be a damping ring, a damping sheet or other structure made of silica gel material.

[0092] Specifically, please refer to Figure 7 , the sealing structure 90 of the open earphone 100 can be a sealing ring made of damping material such as silica gel or rubber. The sealing ring is arranged on one of the shell 11 and the sound outlet 12 and sealingly abuts against the other one of the shell 11 and the sound outlet 12. In an embodiment of the present application, the sound outlet 12 is nested in the shell 11, and the sealing ring is clamped between the outer wall surfaces of the shell 11 and the sound outlet 12. In this embodiment, a fixing groove can be arranged on the sound outlet 12 or the shell 11, and the sealing ring is clamped and fixed in the fixing groove. The arrangement of the sealing ring also helps to reduce the resonance amplitude of the sound outlet 12 and the shell 11 due to mechanical structure during sound transmission, thereby avoiding damage to the mechanism due to vibration stress reaching the limit, and the sealing ring clamped between the outer wall surfaces of the shell 11 and the sound outlet 12 can also seal the gap between the outer wall surfaces of the shell 11 and the sound outlet 12 due to relative movement, so as to prevent foreign matters from entering the inside of the open earphone 100, affect the normal work of the open earphone 100, and prolong the service life of the open earphone 100.

[0093] The same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components; in the description of the present application, it should be understood that the orientations or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right” are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present application. For those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0094] The above merely provides preferred embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement, and improvement made in the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An open earphone, characterized by, The open earphone comprises: a wearing part for wearing the open earphone on a user's ear; a sound producing part comprising a housing and a sound outlet, the housing is connected with the wearing part, the sound outlet is provided with a first sound outlet hole, the sound outlet is movably connected with the housing, the sound outlet is telescopically movable relative to the housing so that the open earphone can adjust the distance between the first sound outlet hole and the user's ear canal opening when being worn; a first loudspeaker arranged in the sound outlet; and a second loudspeaker arranged in the housing.

2. Open earphone according to claim 1, characterized in that When the sound outlet is in a first position, the sound outlet is spaced apart from the user's ear canal opening.

3. Open earphone according to claim 2, characterized in that The first sound outlet hole is located at the front end of the sound outlet. When the sound outlet is in a second position, the front end of the sound outlet is inserted into the user's ear canal opening.

4. The open headphone of claim 3, wherein The sound outlet is telescopically movable relative to the housing between the first position and the second position, the open earphone further comprises a circuit board arranged in the housing, the circuit board is used for controlling the first loudspeaker and the second loudspeaker to work simultaneously when the sound outlet is in the first position, and controlling the first loudspeaker to work alone when the sound outlet is in the second position.

5. The open headphone of claim 4, wherein The open earphone further comprises a detection assembly electrically connected with the circuit board, for detecting the position information of the sound outlet and sending the position information to the circuit board; The circuit board is used for controlling the first loudspeaker and the second loudspeaker to work simultaneously when receiving the position information sent by the detection assembly and representing that the sound outlet is in the first position, and controlling the first loudspeaker to work alone when receiving the position information sent by the detection assembly and representing that the sound outlet is in the second position.

6. The open headphone of claim 5, wherein, The detection assembly comprises a detection piece and a trigger piece, the detection piece is arranged in the housing and electrically connected with the circuit board, and the trigger piece is arranged in the sound outlet.

7. The open headphone of claim 1, wherein The housing is sleeved on the sound outlet, an outlet channel is defined between the sound outlet and the housing, a sound guide hole is arranged on the side wall of the sound outlet, the housing is provided with a second sound outlet hole, and the outlet channel communicates with the sound guide hole and the second sound outlet hole.

8. The open headphone of claim 7, wherein, The sound guide hole is arranged closer to the second loudspeaker than to the first loudspeaker.

9. The open headphone of claim 7, wherein, An installation opening is arranged at the end of the housing away from the wearing part, the sound outlet is movably installed at the installation opening and telescopically movable relative to the housing, the open earphone further comprises an elastic sealing piece, the elastic sealing piece is installed at the installation opening and elastically abuts against the outer wall of the sound outlet.

10. The open headphone of claim 7, wherein, The first loudspeaker divides the space in the sound outlet into a first sound cavity located at the rear side of the first loudspeaker, the second loudspeaker divides the space in the housing into a second sound cavity located at the front side of the second loudspeaker, the first sound cavity and the second sound cavity communicate with each other and jointly constitute a coupled sound cavity, and the coupled sound cavity communicates with the sound guide hole.

11. The open headphone of claim 1, wherein, The open earphone further comprises an adjusting mechanism for driving the sound outlet to telescopically move relative to the housing.

12. The open headphone of claim 11, wherein, The adjusting mechanism comprises: a piezoelectric vibrator; and a friction piece arranged at an output end of the piezoelectric vibrator and in transmission contact with the sound outlet nozzle, so that the piezoelectric vibrator drives the friction piece to move and drives the sound outlet nozzle to move in the telescopic direction; wherein the first loudspeaker has a guide hole, and a part of the friction piece can be arranged in the guide hole.

13. The open headphone of claim 12, wherein, The friction piece is a carbon rod. A cross-sectional diameter of the carbon rod is a, and a hole diameter of the guide hole is b, and the b satisfies (0.5 mm + a) ≤ b ≤ (1.5 mm + a).

14. The open headphone of claim 1, wherein, Further comprising: a noise reduction microphone located between the first loudspeaker and the first sound outlet hole.

15. The open earphone according to any one of claims 1 to 14, characterized in that, Further comprising: an ear cap sleeved outside the sound outlet nozzle, and the ear cap is provided with a sound hole communicating the first sound outlet hole with an external environment. Further comprising: an ear cap sleeved outside the sound outlet nozzle, and the ear cap is provided with a sound hole communicating the first sound outlet hole with an external environment.

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