Open-back wearable stereo headphones

Abstract

This invention provides an open-back wearable stereo headphone. The housing has a through-hole connecting the mounting cavity and the outside of the headphone body. An ear cap connecting assembly, operable and movable relative to the through-hole, is disposed on the headphone body. The ear cap connecting assembly has a retracted position and an extended position relative to the through-hole. When the ear cap connecting assembly is in the extended position, the length protruding from the outer surface of the housing is greater than the length protruding from the outer surface of the housing when in the retracted position. An ear cap is provided and detachably connected to the ear cap connecting assembly. When the ear cap connecting assembly is in the extended position, the portion of the ear cap connecting assembly protruding from the outer surface of the housing can be connected to the ear cap. This allows the user to convert the open-back wearable stereo headphone into an in-ear form, meeting the user's need for better noise isolation in certain usage situations.

Description

Open-back wearable stereo headphones Technical Field

[0001] This invention relates to the field of headphone technology, and more particularly to an open-back wearable stereo headphone. Prior Technology

[0002] Open-ear stereo (OWS) headphones, due to their open-ear design, do not isolate users from ambient noise, offering good wearing comfort and allowing users to easily focus on surrounding sounds and communicate with others, making them increasingly popular. Various wearing styles are available on the market, including clip-on, ear-hook, and behind-the-ear headphones, to meet different user needs. However, because of the non-in-ear design of current open-ear stereo headphones, ambient noise can easily interfere with the audio playback in noisy environments, requiring users to switch to headphones with better noise isolation, which is inconvenient. Summary of the Invention

[0003] In view of this, the purpose of this invention is to provide an open-back wearable stereo headset that can be conveniently converted from an open-back headset to an in-ear headset through selective operation, thereby meeting the needs of users in different usage situations.

[0004] This novel embodiment provides an open-back wearable stereo headphone, including a headphone body, a tail, an ear hook, and an ear cap. The headphone body includes a shell, a sound-generating device, and an ear cap connecting assembly. The shell has a mounting cavity, and the sound-generating device is disposed within the mounting cavity. The shell has a through hole communicating with the mounting cavity and the outside of the headphone body. The ear cap connecting assembly is disposed in the through hole and is movable relative to the through hole. The ear cap connecting assembly has a retracted position and an extended position relative to the through hole. The ear cap connecting assembly has a sound outlet communicating with the mounting cavity and the outside of the headphone body. The sound outlet is opposite to the sound-generating device, and the ear cap connecting assembly and the sound-generating device are spaced apart. The ear hook connects the headphone body and the tail. The ear cap and the ear cap connecting assembly are detachably connected. The ear cap is connected when the ear cap is positioned in the extended position of the ear cap connecting assembly, and the ear cap is eccentrically positioned relative to the sound outlet.

[0005] Furthermore, the outer surface of the housing has a first outer stop surface, which surrounds the through hole. The through hole has a first inner stop surface, which faces the mounting cavity. One end of the ear cap connecting assembly has an outer protruding edge, and the other end opposite to the outer protruding edge has an inner protruding edge. The outer protruding edge is located outside the through hole and has a first abutting surface opposite to the first outer stop surface. The inner protruding edge is located in the through hole and has a second abutting surface opposite to the first inner stop surface. When the ear cap connecting assembly is in the retracted position, the first abutting surface is close to the first outer stop surface, and the second abutting surface is away from the first inner stop surface. When the ear cap connecting assembly is in the extended position, the second abutting surface is close to the first inner stop surface, and the first abutting surface is away from the first outer stop surface.

[0006] Furthermore, the through hole has a second outer stop surface disposed opposite to the first abutting surface; the ear cap connecting assembly includes an outer connector, an inner connector and an elastic member; an outer protruding edge is disposed on the outer connector; the inner connector is connected to the outer connector, and an inner protruding edge is disposed on the inner connector; the elastic member abuts between the first abutting surface and the second outer stop surface.

[0007] Furthermore, the side of the outwardly protruding edge facing the mounting cavity has a first fixing groove, and the end of the elastic member away from the second outer stop surface is located in the first fixing groove.

[0008] Furthermore, the outer connector has a first tubular portion with an outwardly protruding edge at the end of the first tubular portion away from the mounting cavity, and the inner connector has a second tubular portion with an inwardly protruding edge at the end of the second tubular portion close to the mounting cavity; the second tubular portion is fitted over the first tubular portion, or the first tubular portion is fitted over the second tubular portion.

[0009] Furthermore, the outer connector has a first tubular portion with an outwardly protruding edge at the end of the first tubular portion away from the mounting cavity, and the inner connector has a second tubular portion with an innerly protruding edge at the end of the second tubular portion close to the mounting cavity; the inner connector has a first hole segment and a second hole segment, the second hole segment is located at the end of the first hole segment away from the mounting cavity and the diameter of the second hole segment is larger than the diameter of the first hole segment, a stepped surface is formed at the connection between the first hole segment and the second hole segment, the first tubular portion is located in the second hole segment, and the end of the first tubular portion away from the outwardly protruding edge is opposite to the stepped surface, and the elastic element is a spring, which is sleeved on the outside of the second tubular portion.

[0010] Furthermore, the outer protrusion has a second fixing groove on the side opposite to the mounting cavity, and the ear cap connection assembly also includes an end cap, which is fixed in the second fixing groove, and the end cap has multiple sound-permeable holes.

[0011] Furthermore, the end cap includes a cover plate and a retaining ring, with a sound-permeable hole provided in the cover plate, and the retaining ring extending from the outer edge of the cover plate toward the inner convex edge, and the retaining ring being fixed in the second retaining groove; the ear cap connecting assembly also includes a washer, which is disposed between the cover plate and the bottom wall of the second retaining groove.

[0012] Furthermore, the inner convex edge has at least one limiting block, the limiting block has a second abutting surface, the sidewall of the through hole has at least one trajectory groove that matches the limiting block, the trajectory groove includes a longitudinal guide groove, a first inner stop surface is provided on the bottom wall of the longitudinal guide groove, the longitudinal guide groove has an opening at one end near the mounting cavity, the through hole also has a second inner stop surface, the second inner stop surface is provided laterally on the opening of the longitudinal guide groove and is far away from the first outer stop surface relative to the first inner stop surface; when the ear cap connecting assembly is in the storage position, the second abutting surface of the limiting block is opposite to the second inner stop surface.

[0013] Furthermore, the second inner stop surface has a limiting protrusion. When the ear cap connecting assembly is in the storage position, the second abutting surface of the limiting block abuts against the limiting protrusion, and the first abutting surface abuts against the first outer stop surface.

[0014] Furthermore, there is a slope between the second inner stop surface and the side wall of the longitudinal guide groove.

[0015] Furthermore, there are multiple limit blocks and track grooves, with multiple track grooves spaced apart circumferentially along the through hole. The track groove also includes a transverse guide groove, with a second inner stop surface located in the transverse guide groove, and a longitudinal guide groove extending from the bottom wall of the transverse guide groove in a direction away from the mounting cavity.

[0016] Furthermore, the longitudinal guide groove extends to the middle of the transverse guide groove, and second inner stop surfaces are respectively provided on both sides of the longitudinal guide groove.

[0017] Furthermore, the ear cap has a sleeve and a cap body; the sleeve has a sound guide channel, a first end near the through hole and a second end opposite to the first end, the first end has an inner folded edge extending from the center of the sound guide channel, after the ear cap is connected to the ear cap connecting assembly, the sound guide channel is aligned with the sound outlet hole, and the inner folded edge is located between the first outer stop surface and the first abutment surface; the cap body is located on the outer periphery of the sleeve and one end is connected to the second end, and the shape of the cap body matches the shape of the human ear canal.

[0018] Furthermore, the sound guide channel has a raised edge mounting groove, and the side wall of the raised edge mounting groove away from the second end forms an inner folded edge between the end face of the first end. When the ear cap is connected to the ear cap connecting assembly, the outer raised edge is provided in the raised edge mounting groove.

[0019] Furthermore, the side of the outer convex edge has multiple anti-slip protrusions spaced apart circumferentially. When the ear cap is connected to the ear cap connecting assembly, at least one anti-slip protrusion contacts the bottom wall of the convex edge mounting groove.

[0020] Furthermore, the axis of the sound guide channel is inclined relative to the axis of the sound outlet, and the cap body has a non-centrally symmetrical structure.

[0021] Furthermore, the outer surface of the housing has a recessed groove, the first outer stop surface is the bottom wall of the recessed groove, and when the ear cap connecting assembly is in the storage position, the outer protrusion is at least partially accommodated in the recessed groove.

[0022] Furthermore, the length of the ear cap connecting assembly protruding from the outer surface of the housing when in the extended position is greater than the length protruding from the outer surface of the housing when in the retracted position.

[0023] Furthermore, the sound outlet has a tapering section that gradually narrows from the end closest to the mounting cavity to the end furthest from the mounting cavity.

[0024] This novel embodiment provides an open-back wearable stereo headphone. The housing has a through-hole connecting the mounting cavity and the exterior of the headphone body. An ear cap connecting assembly, operable and movable relative to the through-hole, is disposed within the headphone body. The ear cap connecting assembly has a retracted position and an extended position relative to the through-hole, with the length of the ear cap connecting assembly protruding from the outer surface of the housing in the extended position being greater than the length protruding from the outer surface of the housing in the retracted position. An ear cap is detachably connected to the ear cap connecting assembly. When the ear cap connecting assembly is in the extended position, the portion of the ear cap connecting assembly protruding from the outer surface of the housing is connected to the ear cap. Therefore, while ensuring good appearance and sound quality in the open-back wearable stereo headphone's open-back playback state, the user can easily convert the headphone from an open-back form to an in-ear form to meet the user's need for sound isolation in certain usage situations, and can guarantee good sound quality in different modes. Simple Explanation of the Diagram

[0025] The above and other objects, features, and advantages of the present invention will become clearer from the following description of embodiments with reference to the figures, in which: FIG1 is a perspective view of an open-back wearable stereo headset according to an embodiment of the present invention without ear tips; FIG2 is a perspective view of an open-back wearable stereo headset according to an embodiment of the present invention with ear tips; FIG3 is a front view of an open-back wearable stereo headset according to an embodiment of the present invention; FIG4 is a top view of an open-back wearable stereo headset according to an embodiment of the present invention; FIG5 is a right view of an open-back wearable stereo headset according to an embodiment of the present invention; FIG6 is an exploded view of an open-back wearable stereo headset according to an embodiment of the present invention; FIG7 is an internal structure diagram of an open-back wearable stereo headset according to an embodiment of the present invention; FIG8 is a connection diagram of the ear tip connecting assembly with the shell in the stowed position according to an embodiment of the present invention; FIG9 is a partially enlarged view of point C in FIG8; Figure 10 is a schematic diagram of the connection between the ear cap connecting assembly and the housing in the extended position according to an embodiment of the present invention; Figure 11 is a partially enlarged schematic diagram of point D in Figure 10; Figure 12 is an exploded structural schematic diagram of the ear cap connecting assembly in one perspective according to an embodiment of the present invention; Figure 13 is an exploded structural schematic diagram of the ear cap connecting assembly in another perspective according to an embodiment of the present invention; Figure 14 is a schematic diagram of the internal structure of the ear cap connecting assembly in one embodiment of the present invention; Figure 15 is a schematic diagram of the structure of the through hole in the housing according to an embodiment of the present invention; Figure 16 is a schematic diagram of the relative positional relationship between the ear cap connecting assembly and the through hole in the retracted position according to an embodiment of the present invention; Figure 17 is a schematic diagram of the relative positional relationship between the ear cap connecting assembly and the through hole in the extended position according to an embodiment of the present invention. Implementation

[0026] The present application is described below based on embodiments, but it is not limited to these embodiments. In the detailed description of the present application below, certain specific details are described in detail. Those skilled in the art to which this application pertains will fully understand the present application without these details. To avoid obscuring the substance of the present application, well-known methods, processes, flows, elements, and circuits are not described in detail.

[0027] Furthermore, those skilled in the art to which this application pertains should understand that the proportions shown in the drawings provided herein are only one embodiment, and other embodiments are not necessarily implemented to scale.

[0028] Unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixation" 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 to which this application pertains can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] For ease of explanation, spatially related terms such as "inner," "outer," "below," "below," "lower part," "above," and "upper part," etc., are used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. It will be understood that spatially related terms may be intended to encompass different orientations of the device in use or operation besides those depicted in the figures. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially related descriptive terms used herein should be interpreted accordingly.

[0030] Unless the context explicitly requires it, words such as "including" or "contains" throughout the application should be interpreted as including rather than exclusive or exhaustive; that is, meaning "including but not limited to".

[0031] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0032] This invention provides an open-back wearable stereo headset, which can be a clip-on, behind-the-ear, or over-the-ear headset. Figures 1 to 17 show the structure of the open-back wearable stereo headset according to this invention, wherein the cross-sectional position shown in Figure 7 is the BB plane in Figure 4, and the cross-sectional positions shown in Figures 8 and 10 are the AA plane in Figure 3. Referring to Figures 1 to 7, the open-back wearable stereo headset includes a headset body 1, a tail 2, and an ear hook 3. The ear hook 3 is connected between the headset body 1 and the tail 2. The headset body 1 includes a housing 10, and the housing 10 has a mounting cavity 11, in which a sound-generating device 20 is disposed. The sound-generating device 20 can be a dynamic speaker, a balanced armature speaker, a planar magnetic speaker, an electrostatic speaker, or other devices that can control sound generation. When a user wears the open-back wearable stereo headset, the headset body 1 is located in front of the auricle and close to the ear canal, so that the sound emitted by the sound-generating device 20 can be transmitted into the ear canal. The ear hook 3 wraps around from the front of the auricle to the back of the auricle, and the tail 2 is located at the back of the auricle. In one usage scenario, referring to Figure 1, the open-back stereo headphones are clip-on headphones. When wearing the open-back stereo headphones, the headphone body 1 and the tail 2 clamp the auricle from the front and back sides of the user's ear, respectively, so that the open-back stereo headphones can be clipped onto the ear. In another usage scenario, the open-back stereo headphones are ear-hook headphones. The ear hook 3 wraps around from the top and front of the ear to the back of the ear at the connection between the ear and the head, so that the open-back stereo headphones can be hung on the ear. In yet another usage scenario, the open-back stereo headphones are behind-the-ear headphones. The tail 2 can be extended so that when the user wears the open-back stereo headphones, the tail 2 can be hung behind the user's neck. In this embodiment of the invention, the open-back stereo headphones are clip-on headphones as an example for explanation.

[0033] Referring to Figure 6, the housing 10 may include multiple sub-housings 15 to facilitate the installation of the sound-generating device 20 and other components within the housing 10. The multiple sub-housings 15, when connected in a specific manner, can form the entire housing 10 and a relatively enclosed mounting cavity 11. The sub-housings 15 can be connected via snap-fit ​​connections, fastener connections, or other methods. Referring to Figures 6 and 7, the housing 10 has a through-hole 12, which connects the mounting cavity 11 and the exterior of the earphone body 1. The sound-generating device 20 is opposite to the through-hole 12. The earphone body 1 also includes an ear cap connecting assembly 30, which is mounted in the through-hole 12 in a manner movable relative to it. The ear cap connecting assembly 30 has a sound outlet 31 connecting the mounting cavity 11 and the exterior of the earphone body 1. The sound outlet 31 is opposite to the sound-generating device 20, and the sound emitted by the sound-generating device 20 can be transmitted to the exterior of the earphone body 1 through the sound outlet 31. Optionally, the diameter of the section of the sound outlet 31 near the mounting cavity 11 is larger to match the size of the sound-generating device 20. The sound outlet 31 has a tapering section 311 that gradually narrows from the end near the mounting cavity 11 to the end away from the mounting cavity 11, so that the sound is focused and the directionality of the sound is improved to ensure the user's hearing effect.

[0034] The ear cap connecting assembly 30 has a retracted position and an extended position relative to the through hole 12. Figures 1, 8, 9, and 16 show the state of the ear cap connecting assembly 30 in the retracted position, and Figures 2 to 5, 7, 10, 11, and 17 show the state of the ear cap connecting assembly 30 in the extended position. In this novel embodiment, the ear cap connecting assembly 30 can be operated to move axially relative to the through hole 12, thereby achieving extension and retraction relative to the outer surface of the housing 10. Referring to the states of the ear cap connecting assembly 30 in the retracted position shown in Figures 1, 8, and 9, and the states of the ear cap connecting assembly 30 in the extended position shown in Figures 7, 10, and 11, it can be seen that when the ear cap connecting assembly 30 is in the retracted position, the end face of the ear cap connecting assembly 30 can be substantially flush with or slightly higher than the outer surface of the housing 10, while the length of the ear cap connecting assembly 30 exposed on the outer surface of the housing 10 when in the extended position is greater than the length exposed on the outer surface of the housing 10 when in the retracted position. When the ear cap connecting assembly 30 is in the storage position, there is still a certain gap between the ear cap connecting assembly 30 and the sound-generating device 20 to prevent the ear cap connecting assembly 30 from affecting the normal sound generation of the sound-generating device 20.

[0035] In this novel embodiment, the open-back wearable stereo headphones may further include an ear cap 4 detachably connected to the ear cap connecting assembly 30, which can be inserted into the ear canal. As shown in Figures 2 to 5, 7, 10, and 11, when the ear cap connecting assembly 30 is in the extended position, the length of the ear cap connecting assembly 30 protruding from the outer surface of the housing 10 is relatively long, allowing the portion of the ear cap connecting assembly 30 protruding from the outer surface of the housing 10 to connect with the ear cap 4. The ear cap 4 has a sound guiding channel 411. When the ear cap connecting assembly 30 is in the extended position and the ear cap 4 is connected to the ear cap connecting assembly 30, the sound guiding channel 411 is aligned with the sound outlet 31 of the ear cap connecting assembly 30. When the user wears the open-back wearable stereo headphones, the sound waves emitted by the sound-emitting device 20 enter the ear canal through the sound outlet 31 and the sound guiding channel 411, thus forming an in-ear shape for the open-back wearable stereo headphones.

[0036] Therefore, this novel embodiment, by providing an ear cap connecting component 30 that is movable relative to the through hole 12 and an ear cap 4 that is detachably connected to the ear cap connecting component 30, allows the user to switch between open-back stereo headphones and in-ear playback modes as needed, adapting to different usage situations. Specifically, when the ear cap connecting component 30 is in the retracted position, the ear cap 4 is not connected to the ear cap connecting component 30, and the open-back stereo headphones play sound outward through the sound outlet 31 of the ear cap connecting component 30, forming an open-back headphone form; when it is necessary to convert the open-back stereo headphones into in-ear headphones, the user can operate the ear cap connecting component 30 to switch it from the retracted position to the extended position, and then the ear cap 4 is installed on the ear cap connecting component 30.

[0037] In a comparative example, grooves for mounting the ear tips 4 are directly provided on the surface of the outer shell. However, this arrangement exposes the grooves when the ear tips 4 are not connected to the outer shell, which not only disrupts the cleanliness of the headphone's surface but also allows dust and other debris to accumulate in the grooves, affecting the hygiene of the headphones. Furthermore, excessive dirt accumulation in the grooves may also affect the installation of the ear tips 4. In contrast, this novel embodiment uses an extendable and retractable ear tip connecting assembly 30 as the component for mounting the ear tips 4. This allows the open-back stereo headphones to maintain a good surface appearance even when the ear tips 4 are not connected, and it also facilitates dirt prevention and cleaning. The reliability of the ear tip 4 connection is also effectively guaranteed.

[0038] In some embodiments, the outer surface of the housing 10 has a first outer stop surface 13, which surrounds the through hole 12. Figures 12 and 13 are exploded structural schematic diagrams of the ear cap connecting assembly 30 from two different perspectives according to some embodiments of the present invention, and Figure 14 is a cross-sectional schematic diagram of the ear cap connecting assembly 30. Referring to Figures 8 to 14, one end of the ear cap connecting assembly 30 has an outer protruding edge 331, which is located outside the through hole 12 and has a first abutting surface 3311 opposite to the first outer stop surface 13. The inner wall of the through hole 12 has a first inner stop surface 121, which faces the mounting cavity 11. The other end of the ear cap connecting assembly 30 opposite to the outer protruding edge 331 has an inner protruding edge 341, which is located in the through hole 12 and has a second abutting surface 3411 opposite to the first inner stop surface 121. The outer protruding edge 331 and the inner protruding edge 341 limit the extension and retraction length of the ear cap connecting assembly 30 from the outer and inner sides of the housing 10, respectively. As shown in Figures 8 and 9, when the ear cap connecting assembly 30 is in the retracted position, the first abutting surface 3311 is close to or even abuts against the first outer stop surface 13, while the second abutting surface 3411 is away from the first inner stop surface 121. Preferably, when the ear cap connecting assembly 30 is in the retracted position, the first abutting surface 3311 abuts against the first outer stop surface 13, which can prevent liquid or dust from entering the housing 10 through the through hole 12 from the gap between the outer protruding edge 331 and the first outer stop surface 13, thus improving the waterproof and dustproof effect of the open-back wearable stereo headphones. As shown in Figures 10 and 11, when the ear cap connecting assembly 30 is in the extended position, the second abutting surface 3411 approaches or even abuts against the first inner stop surface 121, while the first abutting surface 3311 is away from the first outer stop surface 13. Optionally, when the ear cap connecting assembly 30 is in the extended position, the second abutting surface 3411 abuts against the first inner stop surface 121, which can prevent liquid or dust from entering through the through hole 12 and then continuing to enter the mounting cavity 11 through the gap between the second abutting surface 3411 and the first inner stop surface 121, thereby improving the waterproof and dustproof effect of the open-back wearable stereo headphones.

[0039] In some embodiments, the through hole 12 has a second outer stop surface 122 disposed opposite to the first abutment surface 3311, and there is a certain distance between the second outer stop surface 122 and the first outer stop surface 13. The ear cap connecting assembly 30 includes an elastic element 32, which abuts between the first abutment surface 3311 and the second outer stop surface 122 to provide support for the ear cap connecting assembly 30. Since the portion of the ear cap connecting assembly 30 protruding from the outer surface of the housing 10 in the retracted position is relatively short, it may be inconvenient for the user to directly pull out the ear cap connecting assembly 30. In this embodiment, by providing the elastic element 32, when the ear cap connecting assembly 30 is moved from the retracted position to the extended position by the user, the elastic element 32 can provide a springing force for the ear cap connecting assembly 30 to extend out of the housing 10. The elastic element 32 can be a spring or other elastic material; for example, in this embodiment, the elastic element 32 is a coil spring. Optionally, as shown in Figures 13 and 14, the side of the outer protrusion 331 facing the mounting cavity 11 has a first fixing groove 3312. The first fixing groove 3312 can be an annular groove. The end of the elastic member 32 away from the second outer stop surface 122 is located in the first fixing groove 3312, which can prevent the elastic member 32 from shifting.

[0040] In some embodiments, referring to Figures 12 to 14, the ear cap connecting assembly 30 includes an outer connector 33 and an inner connector 34 connected to the outer connector 33, wherein an outer protruding edge 331 is provided on the outer connector 33 and an inner protruding edge 341 is provided on the inner connector 34. When assembling the open-back wearable stereo headphones, the inner connector 34 is installed from the inside of the housing 10, and the outer connector 33 is installed from the outside of the through hole 12. Then, the outer connector 33 and the inner connector 34 are connected and fixed so that the outer connector 33 and the inner connector 34 can move synchronously in the through hole 12.

[0041] In some embodiments, the outer connector 33 has a first tubular portion 332, with an outer protrusion 331 disposed at the end of the first tubular portion 332 away from the mounting cavity 11, and the inner connector 34 has a second tubular portion 342, with an inner protrusion 341 disposed at the end of the second tubular portion 342 near the mounting cavity 11. The outer connector 33 and the inner connector 34 each have an axially penetrating hole. The second tubular portion 342 is fitted over the first tubular portion 332, or the first tubular portion 332 is fitted over the second tubular portion 342, thereby achieving a coaxial connection between the outer connector 33 and the inner connector 34 and ensuring the coaxial rotation of the outer protrusion 331 and the inner protrusion 341.

[0042] In one embodiment, referring to FIG15, the external connector 33 has a first hole segment 343 and a second hole segment 344, the second hole segment 344 being located at the end of the first hole segment 343 away from the mounting cavity 11. The diameter of the second hole segment 344 is larger than the diameter of the first hole segment 343, such that a stepped surface 345 is formed at the connection between the first hole segment 343 and the second hole segment 344. The diameter of the second hole segment 344 matches the outer diameter of the first tubular portion 332, while the diameter of the first hole segment 343 is smaller than the outer diameter of the first tubular portion 332, allowing the first tubular portion 332 to be inserted into the second hole segment 344, with the end of the first tubular portion 332 away from the outer protrusion 331 facing the stepped surface 345. Optionally, a tapered section 311 may be located at the end of the first tubular portion 332 near the stepped surface 345. The first elastic element 32 can be a spring. The spring is sleeved outside the second tubular part 342. After the first tubular part 332 is inserted into the second hole 344, the first tubular part 332 and the second tubular part 342 can be fixed by adhesive, snap-fit ​​connection or other means.

[0043] As shown in Figures 12 and 13, the inner convex edge 341 may have one or more radially extending limiting blocks 3412, each limiting block 3412 having a second abutment surface 3411. Figures 15 to 17 are schematic diagrams of the through hole 12 viewed from the inside of the housing 10. As shown in Figure 15, the sidewall of the through hole 12 has at least one track groove 123 that matches the limiting block 3412, allowing the limiting block 3412 to move within the track groove 123. The track groove 123 includes a longitudinal guide groove 124, with a first inner stop surface 121 disposed on the bottom wall of the longitudinal guide groove 124, and the longitudinal guide groove 124 having an opening 1241 at one end near the mounting cavity 11. The through hole 12 also has a second inner stop surface 125, which is disposed laterally to the opening 1241 of the longitudinal guide groove 124, and the second inner stop surface 125 is further away from the first outer stop surface 13 relative to the first inner stop surface 121. Referring to Figure 16, when the ear cap connecting assembly 30 is in the retracted position, the second abutment surface 3411 of the limiting block 3412 is opposite to the second inner stop surface 125. When the ear cap connecting assembly 30 rotates from the retracted position, the limiting block 3412 moves toward the opening 1241. Referring to Figure 17, when the limiting block 3412 moves to the opening 1241, it can enter the longitudinal guide groove 124, allowing the ear cap connecting assembly 30 to extend outward from the through hole 12. The sidewall of the longitudinal guide groove 124 can prevent the ear cap connecting assembly 30 from rotating when it extends.

[0044] The track groove 123 also includes a transverse guide groove 128, which extends circumferentially along the central axis of the through hole 12 and has a length greater than the width of the limiting block 3412. A second inner stop surface 125 is provided in the transverse guide groove 128, and the limiting block 3412 can move along the transverse guide groove 128, so that the ear cap connecting assembly 30 can rotate in the through hole 12 within a certain angle range. The longitudinal guide groove 124 extends from the bottom wall of the transverse guide groove 128 in a direction away from the mounting cavity 11. When the ear cap connecting assembly 30 is operated by the user and rotates in the through hole 12, the limiting block 3412 moves along the transverse guide groove 128 to the position of the longitudinal guide groove 124. Under the action of the elastic member 32, the limiting block 3412 moves along the longitudinal guide groove 124, causing the ear cap connecting assembly 30 to pop outward. When the ear cap connecting assembly 30 needs to be retracted, press the ear cap connecting assembly 30 to move the limiting block 3412 along the transverse guide groove 128 to the longitudinal guide groove 124. Then rotate the ear cap connecting assembly 30 to move the limiting block 3412 along the transverse guide groove 128 to the storage position until the limiting block 3412 contacts the side wall of the transverse guide groove 128, confirming that the ear cap connecting assembly 30 has reached the storage position. The longitudinal guide groove 124 can be provided at the end or middle of the transverse guide groove 128. In one embodiment, referring to FIG15, the longitudinal guide groove 124 extends to the middle of the transverse guide groove 128. Second inner stop surfaces 125 are respectively provided on both sides of the longitudinal guide groove 124, and the ear cap connecting assembly 30 has two corresponding storage positions. Thus, when retracting the ear cap connecting assembly 30, pressing the ear cap connecting assembly 30 and rotating the ear cap connecting assembly 30 clockwise or counterclockwise will reach the storage position, which is convenient for the user.

[0045] In some embodiments, there are multiple limiting blocks 3412 and track grooves 123. The multiple track grooves 123 are spaced apart circumferentially along the through hole 12. The number of limiting blocks 3412 and track grooves 123 is the same, and each limiting block 3412 can move within a corresponding track groove 123. By providing multiple limiting blocks 3412, the connection between the ear cap connecting assembly 30 and the housing 10 can be more stable, preventing misalignment. For example, referring to Figures 15 to 17, there can be three track grooves 123 and three limiting blocks 3412.

[0046] In some embodiments, referring to Figures 9 and 11, the second inner stop surface 125 has a limiting protrusion 126. When the ear cap connecting assembly 30 is in the retracted position, the second abutting surface 3411 of the inner convex edge 341 abuts against the limiting protrusion 126, and the first abutting surface 3311 abuts against the first outer stop surface 13. The limiting protrusion 126 can lock the ear cap connecting assembly 30 in the retracted position, preventing the ear cap connecting assembly 30 from loosening and sliding.

[0047] Optionally, a slope 127 is provided between the second inner stop surface 125 and the side wall of the longitudinal guide groove 124. The slope 127 can increase the size of the opening 1241, which guides the movement of the limiting block 3412 and prevents the limiting block 3412 from being stuck at the opening 1241 due to the opening being too narrow. When the ear cap connecting assembly 30 moves from the storage position to the extension position, the limiting block 3412 moves to the slope 127. Under the elastic force of the elastic member 32, the limiting block 3412 begins to move along the slope 127 towards the longitudinal guide groove 124.

[0048] Referring to Figures 12 to 14, the ear cap connecting assembly 30 also includes an end cap 35. A second fixing groove 3313 is recessed on the side of the outwardly protruding edge 331 facing away from the mounting cavity 11, and the end cap 35 is fixed in the second fixing groove 3313. The end cap 35 provides a certain degree of shielding for the sound outlet 31, and has multiple sound transmission holes 3511 for sound transmission. Optionally, the end cap 35 can be covered with a metal mesh or fabric mesh to further improve the effect of preventing foreign objects from entering the earphone body 1.

[0049] Optionally, the end cap 35 includes a cover plate 351 and a retaining ring 352. A sound-permeable hole 3511 is formed on the cover plate 351. The retaining ring 352 has a cylindrical structure and extends from the outer edge of the cover plate 351 towards the inner convex edge 341. The retaining ring 352 is fixed within the second retaining groove 3313. Optionally, the ear cap connecting assembly 30 also includes a washer 36, which is disposed between the cover plate 351 and the bottom wall of the second retaining groove 3313 to position the cover plate 351. The washer 36 has a perforated hole to connect the sound outlet 31 and the sound-permeable hole 3511 on the end cap 35.

[0050] Referring to Figures 7, 10, and 11, the ear cap 4 has a sleeve 41 and a cap body 42. The sleeve 41 is a hollow tubular structure, and a sound guiding channel 411 is disposed in the sleeve 41. The sleeve 41 has a first end near the through hole 12 and a second end opposite to the first end along the axial direction. The first end has an inner folded edge 412 extending to the center of the sound guiding channel 411. The thickness of the inner folded edge 412 is substantially equal to the distance between the first abutment surface 3311 and the outer surface of the housing 10 when the ear cap connecting assembly 30 is in the extended position. The cap body 42 is located on the outer periphery of the sleeve 41, with one end connected to the second end of the sleeve 41, and the other end extending towards the outer surface of the housing 10, forming a shape similar to an umbrella. The shape of the cap body 42 matches the shape of the human ear canal for insertion into the ear canal. The ear cap 4 is made of an elastic material, such as rubber, foam, or other materials. When the ear cap 4 is connected to the ear cap connecting assembly 30, the first end of the sleeve 41 can undergo elastic deformation, thereby fitting the sleeve 41 over the ear cap connecting assembly 30. After the ear cap 4 is connected to the ear cap connecting assembly 30, the sound guide channel 411 is aligned with the sound outlet 31, and the inner folded edge 412 is located between the first outer stop surface 13 and the first abutment surface 3311, thereby axially limiting the ear cap 4 and preventing it from coming off during use.

[0051] In one embodiment, the sound guide channel 411 has a raised edge mounting groove 413, wherein the side wall of the raised edge mounting groove 413 away from the first end forms an inner folded edge 412 as described above between the end face of the first end of the sleeve tube 41. When the ear cap 4 is connected to the ear cap connecting assembly 30, the outer raised edge 331 is disposed in the raised edge mounting groove 413. When the outer raised edge 331 is an annular structure, the raised edge mounting groove 413 can be a corresponding annular groove. When the outer raised edge 331 is one or multiple arc-shaped structures arranged at intervals, the raised edge mounting groove 413 can also be a corresponding arc-shaped groove. In this way, when the outer raised edge 331 is installed in the arc-shaped groove, circumferential positioning of the ear cap 4 can be achieved.

[0052] Optionally, the outer convex edge 331 has a plurality of anti-slip protrusions 3314 spaced apart circumferentially. When the ear cap 4 is connected to the ear cap connecting assembly 30, at least one anti-slip protrusion 3314 contacts the bottom wall of the convex edge mounting groove 413, which can prevent the ear cap 4 from rotating relative to the ear cap connecting assembly 30.

[0053] When the open-back stereo headphones are worn in open mode, there is a certain distance and angle between the sound outlet 31 and the ear canal. When the ear cap 4 is connected to the ear cap connecting assembly 30, as shown in Figure 10, the ear cap 4 is eccentrically positioned relative to the sound outlet 31, that is, the axis of the sound guide channel 411 can be tilted relative to the axis of the sound outlet 31. The end face of the sound guide channel 411 away from the sound outlet 31 is not perpendicular to the axis of the sound outlet 31, so that it can match the direction of the ear canal, thereby improving the directivity of the sound of the open-back stereo headphones when the ear cap 4 is inserted into the ear canal. The cap body 42 has a non-centrally symmetrical structure, forming a structure with one side longer than the other, so that the cap body 42 can better fit the ear canal when the ear cap 4 is inserted into the ear, achieving a good sound insulation effect. Optionally, in order to facilitate the user's positioning of the ear cap 4 during installation, corresponding installation indicator marks can be set on the housing 10 or the ear cap 4.

[0054] Referring to Figure 11, in one embodiment, the outer surface of the housing 10 has a recessed groove 14, and the first outer stop surface 13 is the bottom wall of the groove 14. When the ear cap connecting assembly 30 is in the storage position, the outer protruding edge 331 is at least partially accommodated in the groove 14, which can protect the ear cap connecting assembly 30 and prevent it from being accidentally touched and loosened when in the storage position. When the ear cap 4 is connected to the ear cap connecting assembly 30, the first end of the sleeve tube 41 at least partially blocks the groove 14, which can prevent foreign objects from entering the through hole 12 from the groove 14.

[0055] This novel embodiment provides an open-back wearable stereo headphone. The housing 10 has a through-hole 12 connecting the mounting cavity 11 and the outside of the headphone body 1. An ear cap connecting assembly 30, operable and movable relative to the through-hole 12, is provided on the headphone body 1. The ear cap connecting assembly 30 has a retracted position and an extended position relative to the through-hole 12, with the length of the ear cap connecting assembly 30 protruding from the outer surface of the housing 10 in the extended position being greater than the length protruding from the outer surface of the housing 10 in the retracted position. An ear cap 4 is detachably connected to the ear cap connecting assembly 30. When the ear cap connecting assembly 30 is in the extended position, the portion of the ear cap connecting assembly 30 protruding from the outer surface of the housing 10 can be connected to the ear cap 4. Therefore, while ensuring good appearance and sound quality in the open-back wearable stereo headphone's open-back playback state, the user can easily convert the open-back wearable stereo headphone into an in-ear form to meet the user's need for headphone noise isolation in certain usage situations, and can ensure good sound performance in different modes.

[0056] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0057] 1: Headphone body

[0058] 2: Tail

[0059] 3: Ear hooks

[0060] 4: Ear caps

[0061] 10: Shell

[0062] 11: Installation cavity

[0063] 12:Through hole

[0064] 121: First inner stop face

[0065] 122: Second outer stop surface

[0066] 123: Track slot

[0067] 124: Longitudinal guide groove

[0068] 1241: Opening

[0069] 125: Second inner stop surface

[0070] 126: Limiting protrusion

[0071] 127: Slope

[0072] 128: Transverse guide groove

[0073] 13: First outer stop surface

[0074] 14: Settling Tank

[0075] 15: Subshell

[0076] 20: Sound-generating devices

[0077] 30: Ear cap connection assembly

[0078] 31: Sound outlet

[0079] 311: Gradual contraction

[0080] 32: Elastic element

[0081] 33: External connectors

[0082] 331: Outer convex edge

[0083] 3311: First contact surface

[0084] 3312: First fixing slot

[0085] 3313: Second fixing slot

[0086] 3314: Anti-slip protrusions

[0087] 332: First tubular portion

[0088] 34: Internal connector

[0089] 341: Inner convex edge

[0090] 3411: Second contact surface

[0091] 3412: Limiting block

[0092] 342: Second tubular portion

[0093] 343: First hole segment

[0094] 344: Second hole section

[0095] 345: Stepped surface

[0096] 35: End cap

[0097] 351: Cover plate

[0098] 3511: Sound transmission hole

[0099] 352: Retaining ring

[0100] 36: Washer

[0101] 41: Connector

[0102] 411: Sound Guide Channel

[0103] 412: Inner fold edge

[0104] 413: Mounting groove for raised edge

[0105] 42: Hat body

Claims

1. An open-back wearable stereo headphone, comprising: An earphone body includes a shell, a sound-generating device, and an ear tip connecting assembly. The shell has a mounting cavity, and the sound-generating device is disposed within the mounting cavity. The shell has a through hole communicating with the mounting cavity and the outside of the earphone body. The ear tip connecting assembly is disposed in the through hole and is movable relative to the through hole. The ear tip connecting assembly has a retracted position and an extended position relative to the through hole. The ear tip connecting assembly has a sound outlet communicating with the mounting cavity and the outside of the earphone body, and the sound outlet is opposite to the sound-generating device. The ear tip connecting assembly and the sound-generating device are spaced apart. A tail section; an ear hook connecting the earphone body and the tail section; and an ear tip detachably connected to the ear tip connecting assembly. The ear tip is connected when the ear tip connecting assembly is in the extended position, and the ear tip is eccentrically positioned relative to the sound outlet.

2. The open-back wearable stereo headphones as described in claim 1, wherein, The outer surface of the housing has a first outer stop surface surrounding the through hole, and the through hole has a first inner stop surface facing the mounting cavity. One end of the ear cap connecting assembly has an outer protruding edge, and the other end opposite to the outer protruding edge has an inner protruding edge. The outer protruding edge is located outside the through hole and has a first abutting surface opposite to the first outer stop surface. The inner protruding edge is located in the through hole and has a second abutting surface opposite to the first inner stop surface. When the ear cap connecting assembly is in the retracted position, the first abutting surface is close to the first outer stop surface, and the second abutting surface is away from the first inner stop surface. When the ear cap connecting assembly is in the extended position, the second abutting surface is close to the first inner stop surface, and the first abutting surface is away from the first outer stop surface.

3. The open-back wearable stereo headphones as described in claim 2, wherein, The through hole has a second outer stop surface disposed opposite to the first abutting surface; the ear cap connecting assembly includes: an outer connector with an outer protrusion disposed on the outer connector; an inner connector connected to the outer connector with an inner protrusion disposed on the inner connector; and an elastic member abutting between the first abutting surface and the second outer stop surface.

4. The open-back wearable stereo headphones as described in claim 3, wherein, The outer protrusion has a first fixing groove on the side facing the mounting cavity, and the end of the elastic member away from the second outer stop surface is disposed in the first fixing groove.

5. The open-back wearable stereo headphones as described in claim 3, wherein, The outer connector has a first tubular portion with an outwardly protruding edge at one end of the first tubular portion away from the mounting cavity, and the inner connector has a second tubular portion with an innerly protruding edge at one end of the second tubular portion near the mounting cavity; the second tubular portion is fitted over the first tubular portion, or the first tubular portion is fitted over the second tubular portion.

6. The open-back wearable stereo headphones as described in claim 3, wherein, The outer connector has a first tubular portion with an outwardly protruding edge at the end of the first tubular portion away from the mounting cavity. The inner connector has a second tubular portion with an innerly protruding edge at the end of the second tubular portion near the mounting cavity. The inner connector has a first hole segment and a second hole segment. The second hole segment is located at the end of the first hole segment away from the mounting cavity, and the diameter of the second hole segment is larger than the diameter of the first hole segment. A stepped surface is formed at the connection between the first hole segment and the second hole segment. The first tubular portion is located in the second hole segment, and the end of the first tubular portion away from the outwardly protruding edge is opposite to the stepped surface. The elastic element is a spring, which is sleeved on the outside of the second tubular portion.

7. The open-back wearable stereo headphones as described in claim 2, wherein, The outer protrusion has a second fixing groove on the side opposite to the mounting cavity. The ear cap connection assembly also includes an end cap, which is fixed in the second fixing groove and has multiple sound-permeable holes.

8. The open-back wearable stereo headphones as described in claim 7, wherein, The end cap includes a cover plate and a retaining ring. The sound-permeable hole is located on the cover plate. The retaining ring extends from the outer edge of the cover plate toward the inner protruding edge and is fixed in the second retaining groove. The ear cap connecting assembly also includes a washer, which is located between the cover plate and the bottom wall of the second retaining groove.

9. The open-back wearable stereo headphones as described in claim 2, wherein, The inner convex edge has at least one limiting block, the limiting block has the second abutment surface, the sidewall of the through hole has at least one track groove that matches the limiting block, the track groove includes a longitudinal guide groove, the first inner stop surface is disposed on the bottom wall of the longitudinal guide groove, the longitudinal guide groove has an opening at one end near the mounting cavity, the through hole also has a second inner stop surface, the second inner stop surface is disposed laterally on the opening of the longitudinal guide groove and is away from the first outer stop surface relative to the first inner stop surface; when the ear cap connecting assembly is in the storage position, the second abutment surface of the limiting block is opposite to the second inner stop surface.

10. The open-back wearable stereo headphones as described in claim 9, wherein, The second inner stop surface has a limiting protrusion. When the ear cap connecting assembly is in the storage position, the second abutting surface of the limiting block abuts against the limiting protrusion, and the first abutting surface abuts against the first outer stop surface.

11. The open-back wearable stereo headphones as described in claim 9, wherein, There is a slope between the second inner stop surface and the side wall of the longitudinal guide groove.

12. The open-back wearable stereo headphones as described in claim 9, wherein, The number of the limiting block and the track groove is multiple. The multiple track grooves are arranged at intervals along the circumference of the through hole. The track groove also includes a transverse guide groove. The second inner stop surface is provided in the transverse guide groove. The longitudinal guide groove extends from the bottom wall of the transverse guide groove in a direction away from the mounting cavity.

13. The open-back wearable stereo headphones as described in claim 12, wherein, The longitudinal guide groove extends to the middle of the transverse guide groove, and the second inner stop surface is provided on both sides of the longitudinal guide groove.

14. The open-back wearable stereo headphones as described in claim 2, wherein, The ear cap has: a connecting tube having a sound channel, the connecting tube having a first end near the through hole and a second end opposite to the first end, the first end having an inward folded edge extending toward the center of the sound channel, after the ear cap is connected to the ear cap connecting assembly, the sound channel is aligned with the sound outlet hole, the inward folded edge is located between the first outer stop surface and the first abutment surface; and a cap body located on the outer periphery of the connecting tube and one end connected to the second end, the shape of the cap body matching the shape of the human ear canal.

15. The open-back wearable stereo headphones as described in claim 14, wherein, The sound guide channel has a raised edge mounting groove, and the inner fold is formed between the side wall of the raised edge mounting groove away from the second end and the end face of the first end. When the ear cap is connected to the ear cap connecting assembly, the outer raised edge is provided in the raised edge mounting groove.

16. The open-back wearable stereo headphones as described in claim 15, wherein, The outer convex edge has multiple anti-slip protrusions spaced circumferentially on its side. When the ear cap is connected to the ear cap connecting assembly, at least one of the anti-slip protrusions contacts the bottom wall of the convex edge mounting groove.

17. The open-back wearable stereo headphones as described in claim 14, wherein, The axis of the sound guide channel is inclined relative to the axis of the sound outlet, and the cap body has a non-centrally symmetrical structure.

18. The open-back wearable stereo headphones as described in claim 14, wherein, The outer surface of the housing has a recessed groove, and the first outer stop surface is the bottom wall of the recessed groove. When the ear cap connecting assembly is in the storage position, the outer protrusion is at least partially accommodated in the recessed groove.

19. The open-back wearable stereo headphones as described in claim 18, wherein, The length of the ear cap connecting assembly protruding from the outer surface of the housing when it is in the extended position is greater than the length protruding from the outer surface of the housing when it is in the retracted position.

20. The open-back wearable stereo headphones as claimed in claim 1, wherein, The sound outlet has a tapering section that gradually narrows from one end near the mounting cavity to the other end away from the mounting cavity.

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