Open type earphone

Abstract

The embodiment of the invention discloses an open type earphone, a shell is provided with a mounting hole which is communicated with an accommodating cavity and the outside of a sound production part, a cover assembly which can be operated to move relative to the mounting hole is arranged on the sound production part, and the cover assembly has a storage position and an extension position relative to the mounting hole. The length of the cover assembly exposed out of the outer surface of the shell when the cover assembly is located at the extending position is larger than the length of the cover assembly exposed out of the outer surface of the shell when the cover assembly is located at the containing position, an earplug detachably connected with the cover assembly is arranged, and when the cover assembly is located at the extending position, the part, exposed out of the outer surface of the shell, of the cover assembly can be connected with the earplug. Therefore, under the condition of ensuring that the open type earphone has good appearance and sound effect in an open type playing state, a user can conveniently convert the open type earphone into an in-ear type so as to meet the requirement of the user for the sound insulation effect of the earphone in some use scenes; and a good sound effect can be ensured in different modes.

Description

Technical Field

[0001] This invention relates to the field of headphone technology, and more particularly to an open-back headphone. Background 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 focus on surrounding sounds and communicate with others, making them increasingly popular. OWS headphones on the market offer various wearing styles, commonly including clip-on, ear-hook, and behind-the-ear designs, to meet different user needs. However, because current OWS headphones are not in-ear, 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 the present invention is to provide an open-back headphone that can be conveniently converted into an in-ear headphone through selective operation, so as to meet the needs of users in different usage scenarios.

[0004] This invention provides an open-back headphone, including a sound-emitting part, a fixing part, an ear hook, and an earplug. The sound-emitting part includes a housing, a speaker, and a cover assembly. The housing has a receiving cavity, and the speaker is disposed within the receiving cavity. The housing has a mounting hole communicating with the receiving cavity and the outside of the sound-emitting part. The cover assembly is disposed in the mounting hole and is movable relative to the mounting hole. The cover assembly has a retracted position and an extended position relative to the mounting hole. The cover assembly has a sound outlet communicating with the receiving cavity and the outside of the sound-emitting part, and the sound outlet is opposite to the speaker. The ear hook connects the sound-emitting part and the fixing part. The earplug is detachably connected to the cover assembly. When the cover assembly is in the extended position, the portion of the cover assembly that protrudes from the outer surface of the housing can be connected to the earplug.

[0005] Furthermore, the outer surface of the housing has a first outer limiting surface, which surrounds the mounting hole. The mounting hole has a first inner limiting surface, which faces the receiving cavity. One end of the cover assembly has a first flange, and the other end opposite to the first flange has a second flange. The first flange is located outside the mounting hole and has a first abutting surface opposite to the first outer limiting surface. The second flange is located in the mounting hole and has a second abutting surface opposite to the first inner limiting surface. When the cover assembly is in the retracted position, the first abutting surface is close to the first outer limiting surface, and the second abutting surface is away from the first inner limiting surface. When the cover assembly is in the extended position, the second abutting surface is close to the first inner limiting surface, and the first abutting surface is away from the first outer limiting surface.

[0006] Furthermore, the mounting hole has a second outer limiting surface disposed opposite to the first abutting surface; the cover assembly includes an outer end cover, an inner end cover, and an elastic element; a first flange is disposed on the outer end cover; the inner end cover is connected to the outer end cover, and a second flange is disposed on the inner end cover; the elastic element abuts between the first abutting surface and the second outer limiting surface.

[0007] Furthermore, the first flange has a first fixing groove on the side facing the receiving cavity, and the end of the elastic member away from the second outer limiting surface is disposed in the first fixing groove.

[0008] Furthermore, the outer end cap has a first cylindrical portion, and a first flange is provided at the end of the first cylindrical portion away from the receiving cavity; the inner end cap has a second cylindrical portion, and a second flange is provided at the end of the second cylindrical portion close to the receiving cavity; the second cylindrical portion is fitted over the first cylindrical portion, or the first cylindrical portion is fitted over the second cylindrical portion.

[0009] Furthermore, the outer end cap has a first cylindrical portion, and a first flange is provided at the end of the first cylindrical portion away from the receiving cavity. The inner end cap has a second cylindrical portion, and a second flange is provided at the end of the second cylindrical portion close to the receiving cavity. The inner end cap has a first hole segment and a second hole segment. The second hole segment is provided at the end of the first hole segment away from the receiving 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 cylindrical portion is provided in the second hole segment. The end of the first cylindrical portion away from the first flange is opposite to the stepped surface. The elastic element is a spring, and the elastic element is sleeved on the outside of the second cylindrical portion.

[0010] Furthermore, the first flange has a second fixing groove on the side opposite to the receiving cavity, and the cover assembly also includes a dust cover fixed in the second fixing groove, the dust cover having multiple sound-permeable holes.

[0011] Furthermore, the dust cover includes a baffle and a retaining ring, with a sound-permeable hole provided on the baffle and the retaining ring extending from the outer edge of the baffle toward the direction close to the second flange, and the retaining ring being fixed in the second retaining groove; the cover assembly also includes a washer, which is disposed between the baffle and the bottom wall of the second retaining groove.

[0012] Furthermore, the second flange has at least one limiting block, the limiting block has a second abutting surface, the sidewall of the mounting hole has at least one track groove that matches the limiting block, the track groove includes an extending limiting groove, a first inner limiting surface is disposed on the bottom wall of the extending limiting groove, the extending limiting groove has an opening at one end near the receiving cavity, the mounting hole also has a second inner limiting surface, the second inner limiting surface is disposed laterally on the opening of the extending limiting groove and is far away from the first outer limiting surface relative to the first inner limiting surface; when the cover assembly is in the storage position, the second abutting surface of the limiting block is opposite to the second inner limiting surface.

[0013] Furthermore, the second inner limiting surface has a limiting protrusion. When the cover 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 limiting surface.

[0014] Furthermore, there is a transition slope between the second inner limiting surface and the side wall extending out of the limiting groove.

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

[0016] Furthermore, the extending limiting groove extends to the middle of the receiving limiting groove, and second inner limiting surfaces are respectively provided on both sides of the extending limiting groove.

[0017] Furthermore, the earplug has a main body and an arc plate; the main body has a sound guide channel, a first end near the mounting hole and a second end opposite to the first end, the first end has an inner flange extending from the center of the sound guide channel, after the earplug is connected to the cover assembly, the sound guide channel is aligned with the sound outlet hole, and the inner flange is located between the first outer limiting surface and the first abutting surface; the arc plate is located on the outer periphery of the main body and one end is connected to the second end, and the shape of the arc plate matches the shape of the human ear canal.

[0018] Furthermore, the sound guide channel has a flange mounting groove, and the side wall of the flange mounting groove away from the second end forms an inward flange with the end face of the first end. When the earplug is connected to the cover assembly, the first flange is located in the flange mounting groove.

[0019] Furthermore, the side of the first flange has a plurality of anti-slip protrusions spaced apart in the circumferential direction, and when the earplug is connected to the cover assembly, at least one anti-slip protrusion contacts the bottom wall of the flange mounting groove.

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

[0021] Furthermore, the outer surface of the housing has a recessed groove, the first outer limiting surface is the bottom wall of the recessed groove, and when the cover assembly is in the storage position, the first flange is at least partially accommodated in the recessed groove.

[0022] Furthermore, the length of the cover 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.

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

[0024] This invention provides an open-back headphone with a housing having a mounting hole connecting a receiving cavity and the outside of a sound-emitting part. A cover assembly is provided on the sound-emitting part, operable and movable relative to the mounting hole. The cover assembly has a retracted position and an extended position relative to the mounting hole, with the length of the cover 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 earbud is provided, detachably connected to the cover assembly. When the cover assembly is in the extended position, the portion of the cover assembly protruding from the outer surface of the housing can be connected to the earbud. Therefore, while ensuring good appearance and sound quality in the open-back headphone's open-back playback state, users can easily convert the open-back headphone into an in-ear form to meet their needs for noise isolation in certain usage scenarios, and can ensure good sound quality in different modes. Attached Figure Description

[0025] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the invention with reference to the accompanying drawings, in which: Figure 1 This is a three-dimensional structural diagram of an open-back headphone according to an embodiment of the present invention when no earplugs are installed; Figure 2 This is a three-dimensional structural diagram of an open-back headphone with earplugs installed according to an embodiment of the present invention; Figure 3 This is a front view of an open-back headphone according to an embodiment of the present invention; Figure 4 This is a top view of an open-back headphone according to an embodiment of the present invention; Figure 5 This is a right view of an open-back headphone according to an embodiment of the present invention; Figure 6 This is an exploded structural diagram of an open-back headphone according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the internal structure of an open-back headphone according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the connection between the cover assembly and the housing in the stowed position according to an embodiment of the present invention; Figure 9 yes Figure 8 A magnified view of part C in the diagram; Figure 10 This is a schematic diagram of the connection between the cover assembly and the housing in the extended position according to an embodiment of the present invention; Figure 11 yes Figure 10 A magnified view of part D in the diagram; Figure 12 This is an exploded structural diagram of a cover assembly according to an embodiment of the present invention, viewed from one perspective. Figure 13 This is an exploded structural diagram of the cover assembly of one embodiment of the present invention, viewed from another perspective; Figure 14 This is a schematic diagram of the internal structure of a cover assembly according to an embodiment of the present invention; Figure 15 This is a schematic diagram of the mounting holes of the housing according to an embodiment of the present invention; Figure 16 This is a schematic diagram showing the relative position of the cover assembly and the mounting hole in the storage position according to an embodiment of the present invention; Figure 17 This is a schematic diagram showing the relative position of the cover assembly and the mounting hole in the extended position according to an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures: 1-Sound-producing part; 2-Fixing part; 3-Ear hook; 4-Earplug; 10-Housing shell; 11-Accommodating cavity; 12-Mounting hole; 121-First inner limiting surface; 122-Second outer limiting surface; 123-Trajectory groove; 124-Extension limiting groove; 1241-Opening; 125-Second inner limiting surface; 126-Limiting protrusion; 127-Transition slope; 128-Receiving limiting groove; 13-First outer limiting surface; 14-Recessed groove; 15-Sub-housing shell; 20-Speaker; 30-Cover assembly; 31-Sound outlet; 311-Gradual tapering section; 32-Elastic element; 33-Outer end cap; 331-First flange ; 3311-First abutting surface; 3312-First fixing groove; 3313-Second fixing groove; 3314-Anti-slip protrusion; 332-First cylindrical part; 34-Inner end cap; 341-Second flange; 3411-Second abutting surface; 3412-Limiting block; 342-Second cylindrical part; 343-First hole section; 344-Second hole section; 345-Step surface; 35-Dust cover; 351-Baffle; 3511-Sound transmission hole; 352-Fixing ring; 36-Washer; 41-Main body; 411-Sound guiding channel; 412-Inner flange; 413-Flange mounting groove; 42-Arc plate. Detailed Implementation

[0027] 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 can 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.

[0028] Furthermore, those skilled in the art should understand that the proportions shown in the accompanying drawings are only one embodiment, and other embodiments are not necessarily implemented to scale.

[0029] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] For ease of explanation, spatially related terms such as “inner,” “outer,” “below,” “below,” “lower,” “above,” “upper,” etc., are used herein to describe the relationship between one element or feature illustrated in the figure and another. 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 figure. 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.

[0031] 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".

[0032] 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.

[0033] This invention provides an open-back headphone, which can be a clip-on headphone, a behind-the-ear headphone, or an ear-hook headphone. Figures 1-17 The structure of an open-back headphone according to an embodiment of the present invention is shown, wherein Figure 7 The location of the cross section shown is Figure 4 BB plane in Figure 8 and Figure 10 The cross-sectional position shown is Figure 3 Plane AA in the diagram. (Refer to...) Figures 1-7 The open-back headphones include a sound-emitting part 1, a fixing part 2, and an ear hook 3. The ear hook 3 is connected between the sound-emitting part 1 and the fixing part 2. The sound-emitting part 1 includes a housing 10, which has a receiving cavity 11, and a speaker 20 is disposed within the receiving cavity 11. When a user wears the open-back headphones, the sound-emitting part 1 is located on the front side of the auricle and close to the ear canal, so that the sound emitted by the speaker 20 can be transmitted into the ear canal. The ear hook 3 wraps around from the front side of the auricle to the back side of the auricle, and the fixing part 2 is located on the back side of the auricle. In one usage scenario, refer to... Figure 1 The open-back headphones are clip-on headphones. When worn, the sound-producing part 1 and the fixing part 2 clamp the auricle from the front and back of the user's ear, respectively, allowing the open-back headphones to fit snugly on the ear. In another usage scenario, the open-back headphones are ear-hook headphones. The ear hook 3 wraps around the ear from above and behind the ear at the connection between the ear and the head, allowing the open-back headphones to hang on the ear. In yet another usage scenario, the open-back headphones are behind-the-neck headphones, where the fixing part 2 can be extended, allowing it to hang behind the user's neck when wearing the open-back headphones. This embodiment of the invention uses clip-on headphones as an example for explanation.

[0034] Reference Figure 6 The housing 10 may include multiple sub-housings 15 to facilitate the mounting of the speaker 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 receiving cavity 11. The sub-housings 15 can be connected by snap-fit ​​connections, fastener connections, or other methods. (See reference...) Figure 6 and Figure 7 The housing 10 has a mounting hole 12 that connects the accommodating cavity 11 and the exterior of the sound-emitting part 1. The speaker 20 is opposite to the mounting hole 12. The sound-emitting part 1 also includes a cover assembly 30, which is mounted in the mounting hole 12 in a manner movable relative to the mounting hole 12. The cover assembly 30 has a sound outlet 31 that connects the accommodating cavity 11 and the exterior of the sound-emitting part 1. The sound outlet 31 is opposite to the speaker 20, and the sound emitted by the speaker 20 can be transmitted to the exterior of the sound-emitting part 1 through the sound outlet 31. Optionally, the diameter of the section of the sound outlet 31 near the accommodating cavity 11 is larger to match the size of the speaker 20. The sound outlet 31 has a tapering section 311 that gradually narrows from one end near the accommodating cavity 11 to the end away from the accommodating cavity 11, so as to concentrate the sound and improve the directivity of the sound to ensure the user's hearing effect.

[0035] The cover assembly 30 has a retracted position and an extended position relative to the mounting hole 12, wherein, Figure 1 , Figures 8-9 and Figure 16 The state of the cover assembly 30 in the stowed position is shown. Figures 2-5 , Figure 7 , Figures 10-11 as well as Figure 17 The state of the cover assembly 30 in the extended position is shown. In this embodiment of the invention, the cover assembly 30 can be operated to move axially relative to the mounting hole 12, thereby achieving extension and retraction relative to the outer surface of the housing 10. (Refer to...) Figure 1 , Figure 8 and Figure 9 The state of the cover assembly 30 in the stowed position shown and Figure 7 , Figures 10-11As shown in the diagram, when the cover assembly 30 is in the extended position, its end face can be substantially flush with or slightly higher than the outer surface of the housing 10 when it is in the retracted position. The length of the cover assembly 30 protruding from the outer surface of the housing 10 when in the extended position is greater than the length protruding from the outer surface of the housing 10 when in the retracted position. When the cover assembly 30 is in the retracted position, there is still a certain gap between the cover assembly 30 and the speaker 20 to prevent the cover assembly 30 from interfering with the normal sound output of the speaker 20.

[0036] In this embodiment of the invention, the open-back headphones may further include an earplug 4 detachably connected to the cover assembly 30, the earplug 4 being inserted into the ear canal. Figures 2-5 , Figure 7 , Figures 10-11 As shown, when the cover assembly 30 is in the extended position, the length of the cover assembly 30 protruding from the outer surface of the housing 10 is relatively long, allowing the portion of the cover assembly 30 protruding from the outer surface of the housing 10 to connect with the earplug 4. The earplug 4 has a sound guide channel 411. When the cover assembly 30 is in the extended position and the earplug 4 is connected to the cover assembly 30, the sound guide channel 411 is aligned with the sound outlet 31 of the main unit. When the user wears the open-back headphones, the sound waves emitted by the speaker 20 enter the ear canal through the sound outlet 31 and the sound guide channel 411, making the open-back headphones form an in-ear shape.

[0037] Therefore, by providing a cover assembly 30 that is movable relative to the mounting hole 12 and an earplug 4 detachably connected to the cover assembly 30, this embodiment of the invention allows users to switch between open-back headphone playback mode and in-ear playback mode as needed, adapting to different usage scenarios. Specifically, when the cover assembly 30 is in the retracted position, the earplug 4 is not connected to the cover assembly 30, and the open-back headphone plays sound outward through the sound outlet 31 of the cover assembly 30, forming an open-back headphone form; when it is necessary to change the open-back headphone into an in-ear headphone, the user can operate the cover assembly 30 to change it from the retracted position to the extended position, and then the earplug 4 is installed on the cover assembly 30.

[0038] In a comparative example, grooves for mounting the earbud 4 are directly formed on the surface of the outer shell. However, this arrangement exposes the grooves when the earbud 4 is 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 headphone. Furthermore, excessive dirt accumulation in the grooves may even interfere with the installation of the earbud 4. In contrast, this embodiment of the invention uses an extendable and retractable cover assembly 30 as the component for mounting the earbud 4. This ensures that the open-back headphones maintain a good overall appearance when the earbud 4 is not connected, facilitates dirt prevention and cleaning, and effectively guarantees the reliability of the earbud 4 connection.

[0039] In some embodiments, the outer surface of the housing 10 has a first outer limiting surface 13, which is disposed around the mounting hole 12. Figure 12 and Figure 13 These are exploded structural schematic diagrams of the cover assembly 30 from two different perspectives, representing some embodiments of the present invention. Figure 14 This is a cross-sectional schematic diagram of the cover component 30. (Refer to...) Figures 8-14 One end of the cover assembly 30 has a first flange 331, which is located outside the mounting hole 12. The first flange 331 has a first abutment surface 3311 opposite to the first outer limiting surface 13. The inner wall of the mounting hole 12 has a first inner limiting surface 121, which faces the receiving cavity 11. The other end of the cover assembly 30 opposite to the first flange 331 has a second flange 341, which is located in the mounting hole 12 and has a second abutment surface 3411 opposite to the first inner limiting surface 121. The first flange 331 and the second flange 341 respectively limit the extension and retraction lengths of the cover assembly 30 from the outside and inside of the housing 10. Figure 8 and Figure 9 As shown, when the cover assembly 30 is in the retracted position, the first abutting surface 3311 is close to or even abuts against the first outer limiting surface 13, while the second abutting surface 3411 is away from the first inner limiting surface 121. Preferably, when the cover assembly 30 is in the retracted position, the first abutting surface 3311 abuts against the first outer limiting surface 13, which can prevent liquid or dust from entering the housing 10 through the mounting hole 12 from the gap between the first flange 331 and the first outer limiting surface 13, thus improving the waterproof and dustproof effect of the open-back headphones. Figure 10 and Figure 11 As shown, when the cover assembly 30 is in the extended position, the second abutting surface 3411 approaches or even abuts against the first inner limiting surface 121, while the first abutting surface 3311 is away from the first outer limiting surface 13. Optionally, when the cover assembly 30 is in the extended position, the second abutting surface 3411 abuts against the first inner limiting surface 121, which can prevent liquid or dust from entering through the mounting hole 12 and then continuing to enter the receiving cavity 11 through the gap between the second abutting surface 3411 and the first inner limiting surface 121, thereby improving the waterproof and dustproof effect of the open-back headphones.

[0040] In some embodiments, the mounting hole 12 has a second outer limiting surface 122 disposed opposite to the first abutting surface 3311, and there is a certain distance between the second outer limiting surface 122 and the first outer limiting surface 13. The cover assembly 30 includes an elastic element 32, which abuts between the first abutting surface 3311 and the second outer limiting surface 122 to provide support for the cover assembly 30. Since the portion of the cover 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 cover assembly 30. In this embodiment, by providing the elastic element 32, when the cover assembly 30 is moved from the retracted position to the extended position by the user, the elastic element 32 can provide a popping force for the cover 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, such as Figure 13 and Figure 14 As shown, the first flange 331 has a first fixing groove 3312 on the side facing the receiving cavity 11. The first fixing groove 3312 can be an annular groove. The end of the elastic member 32 away from the second outer limiting surface 122 is located in the first fixing groove 3312, which can prevent the elastic member 32 from shifting.

[0041] In some embodiments, refer to Figures 12-14 The cover assembly 30 includes an outer end cover 33 and an inner end cover 34 connected to the outer end cover 33, wherein a first flange 331 is provided on the outer end cover 33 and a second flange 341 is provided on the inner end cover 34. During the assembly of the open-back headphones, the inner end cover 34 is installed from the inside of the housing 10, and the outer end cover 33 is installed from the outside of the mounting hole 12. Then, the outer end cover 33 and the inner end cover 34 are connected and fixed so that the outer end cover 33 and the inner end cover 34 can move synchronously in the mounting hole 12.

[0042] In some embodiments, the outer end cap 33 has a first cylindrical portion 332, and a first flange 331 is disposed at the end of the first cylindrical portion 332 away from the receiving cavity 11. The inner end cap 34 has a second cylindrical portion 342, and a second flange 341 is disposed at the end of the second cylindrical portion 342 near the receiving cavity 11. The outer end cap 33 and the inner end cap 34 each have an axially penetrating hole. The second cylindrical portion 342 is fitted over the first cylindrical portion 332, or the first cylindrical portion 332 is fitted over the second cylindrical portion 342, thereby achieving a coaxial connection between the outer end cap 33 and the inner end cap 34, and ensuring the coaxial rotation of the first flange 331 and the second flange 341.

[0043] In one embodiment, refer to Figure 15The outer end cap 33 has a first hole section 343 and a second hole section 344, with the second hole section 344 located at the end of the first hole section 343 away from the receiving cavity 11. The diameter of the second hole section 344 is larger than the diameter of the first hole section 343, forming a stepped surface 345 at the connection between the first hole section 343 and the second hole section 344. The diameter of the second hole section 344 matches the outer diameter of the first cylindrical portion 332, while the diameter of the first hole section 343 is smaller than the outer diameter of the first cylindrical portion 332, allowing the first cylindrical portion 332 to be inserted into the second hole section 344. The end of the first cylindrical portion 332 away from the first flange 331 faces the stepped surface 345. Optionally, a tapered section 311 may be located at the end of the first cylindrical portion 332 near the stepped surface 345. The first elastic element 32 can be a spring, which is sleeved outside the second cylindrical part 342. After the first cylindrical part 332 can be inserted into the second hole 344, the first cylindrical part 332 and the second cylindrical part 342 can be fixed by adhesive, snap-fit ​​connection or other means.

[0044] like Figure 12 and Figure 13 As shown, the second flange 341 may have one or more radially extending limiting blocks 3412, and the limiting blocks 3412 have a second abutment surface 3411. Figures 15-17 This is a schematic diagram showing the mounting hole 12 as viewed from the inside of the housing 10. (See diagram below.) Figure 15 As shown, the sidewall of the mounting hole 12 has at least one track groove 123 that matches the limiting block 3412, within which the limiting block 3412 can move. The track groove 123 includes a protruding limiting groove 124, a first inner limiting surface 121 disposed on the bottom wall of the protruding limiting groove 124, and an opening 1241 at one end near the receiving cavity 11. The mounting hole 12 also has a second inner limiting surface 125, disposed laterally to the opening 1241 of the protruding limiting groove 124, and the second inner limiting surface 125 is further away from the first outer limiting surface 13 relative to the first inner limiting surface 121. (Refer to...) Figure 16 When the cover assembly 30 is in the retracted position, the second abutment surface 3411 of the limiting block 3412 is opposite to the second inner limiting surface 125. When the cover assembly 30 rotates from the retracted position, the limiting block 3412 moves toward the opening 1241, as shown in the figure. Figure 17 When the limiting block 3412 moves to the opening 1241, it can enter the extension limiting groove 124, so that the cover assembly 30 can extend out of the mounting hole 12. The side wall of the extension limiting groove 124 can prevent the cover assembly 30 from rotating when it extends.

[0045] The track groove 123 also includes a receiving and limiting groove 128, which extends circumferentially along the central axis of the mounting hole 12 and has a length greater than the width of the limiting block 3412. A second inner limiting surface 125 is provided in the receiving and limiting groove 128, and the limiting block 3412 can move along the receiving and limiting groove 128, so that the cover assembly 30 can rotate in the mounting hole 12 within a certain angle range. The extending limiting groove 124 extends from the bottom wall of the receiving and limiting groove 128 in a direction away from the receiving cavity 11. When the cover assembly 30 is rotated in the mounting hole 12 by the user, the limiting block 3412 moves along the receiving and limiting groove 128 to the position of the extending limiting groove 124. Under the action of the elastic member 32, the limiting block 3412 moves along the extending limiting groove 124, causing the cover assembly 30 to pop outward. When the cover assembly 30 needs to be retracted, press the cover assembly 30 to move the limiting block 3412 along the receiving limiting groove 128 toward the extending limiting groove 124. Then rotate the cover assembly 30 to move the limiting block 3412 along the receiving limiting groove 128 toward the receiving position until the limiting block 3412 contacts the side wall of the receiving limiting groove 128, confirming that the cover assembly 30 has reached the receiving position. The extending limiting groove 124 can be located at the end or middle of the receiving limiting groove 128. In one embodiment, refer to... Figure 15 The extension limiting groove 124 extends to the middle of the storage limiting groove 128. The two sides of the extension limiting groove 124 are respectively provided with second inner limiting surfaces 125. The cover assembly 30 has two corresponding storage positions. In this way, when the cover assembly 30 is retracted, pressing the cover assembly 30 and rotating the cover assembly 30 clockwise or counterclockwise can reach the storage position, which is convenient for users to operate.

[0046] In some embodiments, there are multiple limiting blocks 3412 and track grooves 123. The multiple track grooves 123 are spaced apart circumferentially along the mounting 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 cover assembly 30 and the housing 10 can be made more stable, preventing misalignment. For example, refer to... Figures 15-17 There can be three track slots 123 and three limit blocks 3412.

[0047] In some embodiments, refer to Figure 9 , Figure 11 The second inner limiting surface 125 has a limiting protrusion 126. When the cover assembly 30 is in the retracted position, the second abutting surface 3411 of the second flange 341 abuts against the limiting protrusion 126, and the first abutting surface 3311 abuts against the first outer limiting surface 13. The limiting protrusion 126 can lock the cover assembly 30 in the retracted position and prevent the cover assembly 30 from loosening or sliding.

[0048] Optionally, a transition slope 127 is provided between the second inner limiting surface 125 and the side wall of the protruding limiting groove 124. The transition 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 cover assembly 30 moves from the storage position to the protruding position, the limiting block 3412 moves to the transition slope 127. Under the elastic force of the elastic member 32, the limiting block 3412 begins to move along the transition slope 127 towards the protruding limiting groove 124.

[0049] Reference Figures 12-14 The cover assembly 30 also includes a dust cover 35. A second fixing groove 3313 is recessed on the side of the first flange 331 opposite to the receiving cavity 11, and the dust cover 35 is fixed in the second fixing groove 3313. The dust cover 35 provides some obstruction to the sound outlet 31, and has multiple sound transmission holes 3511 for sound transmission. Optionally, the dust cover 35 can be made of metal mesh or fabric mesh to cover the sound transmission holes 3511, further improving the effect of preventing foreign objects from entering the sound-emitting part 1.

[0050] Optionally, the dust cover 35 includes a baffle 351 and a retaining ring 352. A sound-permeable hole 3511 is formed on the baffle 351. The retaining ring 352 has a cylindrical structure and extends from the outer edge of the baffle 351 towards the second flange 341. The retaining ring 352 is fixed within the second retaining groove 3313. Optionally, the cover assembly 30 also includes a washer 36, which is disposed between the baffle 351 and the bottom wall of the second retaining groove 3313 to position the baffle 351. The washer 36 has a perforated hole to connect the sound outlet 31 and the sound-permeable hole 3511 on the dust cover 35.

[0051] Reference Figure 7 , Figure 10 and Figure 11The earplug 4 has a main body 41 and an arc plate 42. The main body 41 is a hollow tubular structure, and a sound guiding channel 411 is disposed in the main body 41. The main body 41 has a first end near the mounting hole 12 and a second end opposite to the first end along the axial direction. The first end has an inner flange 412 extending from the center of the sound guiding channel 411. The thickness of the inner flange 412 is substantially equal to the distance between the first abutment surface 3311 and the outer surface of the housing 10 when the cover assembly 30 is in the extended position. The arc plate 42 is located on the outer periphery of the main body 41, with one end connected to the second end and the other end extending towards the outer surface of the housing 10, forming a shape similar to an umbrella. The shape of the arc plate 42 matches the shape of the human ear canal for insertion into the ear canal. The earplug 4 is made of an elastic material, such as rubber, foam, or other materials. When the earplug 4 is connected to the cover assembly 30, the first end of the main body 41 can undergo elastic deformation, thereby fitting the main body 41 over the cover assembly 30. After the earplug 4 is connected to the cover assembly 30, the sound guide channel 411 is aligned with the sound outlet 31, and the inner flange 412 is located between the first outer limiting surface 13 and the first abutting surface 3311, thereby achieving axial limiting of the earplug 4 and preventing the earplug 4 from coming out during use.

[0052] In one embodiment, the sound guide channel 411 has a flange mounting groove 413, wherein the sidewall of the flange mounting groove 413 away from the first end forms an inner flange 412 as described above with the end face of the first end of the main body 41. When the earplug 4 is connected to the cover assembly 30, the first flange 331 is disposed in the flange mounting groove 413. When the first flange 331 is an annular structure, the flange mounting groove 413 can be a corresponding annular groove. When the first flange 331 is one or multiple arc-shaped structures arranged at intervals, the flange mounting groove 413 can also be a corresponding arc-shaped groove. In this way, when the first flange 331 is installed in the arc-shaped groove, circumferential positioning of the earplug 4 can be achieved.

[0053] Optionally, the side of the first flange 331 has a plurality of circumferentially spaced anti-slip protrusions 3314. When the earplug 4 is connected to the cover assembly 30, at least one anti-slip protrusion 3314 contacts the bottom wall of the flange mounting groove 413, which can prevent the earplug 4 from rotating relative to the cover assembly 30.

[0054] When the open-back headphones are worn in open mode, there is a certain distance and angle between the sound outlet 31 and the ear canal. When the earbud 4 is connected to the cover assembly 30, as... Figure 10As shown, the axis of the sound guide channel 411 can be inclined 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 headphones when the earplug 4 is inserted into the ear canal. The arc plate 42 has a non-centrally symmetrical structure, forming a structure with one side longer than the other, so that the arc plate 42 can better fit the ear canal when the earplug 4 is inserted into the ear, achieving a good sound insulation effect. Optionally, in order to facilitate the user's positioning of the earplug 4 during installation, corresponding installation indicator marks can be provided on the housing 10 or the earplug 4.

[0055] Reference Figure 11 In one embodiment, the outer surface of the housing 10 has a recessed groove 14, and the first outer limiting surface 13 is the bottom wall of the groove 14. When the cover assembly 30 is in the storage position, the first flange 331 is at least partially accommodated in the groove 14, which can protect the cover assembly 30 and prevent it from being accidentally touched and loosened when in the storage position. When the earplug 4 is connected to the cover assembly 30, the first end of the main body 41 at least partially blocks the groove 14, which can prevent foreign objects from entering the mounting hole 12 from the groove 14.

[0056] This invention provides an open-back headphone. The housing 10 has a mounting hole 12 connecting the accommodating cavity 11 and the outside of the sound-emitting part 1. A cover assembly 30, operable and movable relative to the mounting hole 12, is provided on the sound-emitting part 1. The cover assembly 30 has a retracted position and an extended position relative to the mounting hole 12, with the length of the cover 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 earplug 4 is provided and detachably connected to the cover assembly 30. When the cover assembly 30 is in the extended position, the portion of the cover assembly 30 protruding from the outer surface of the housing 10 can be connected to the earplug 4. Thus, while ensuring good appearance and sound quality in the open-back headphone's open-back playback state, users can easily convert the open-back headphone into an in-ear form to meet their needs for headphone noise isolation in certain usage scenarios, and can ensure good sound performance in different modes.

[0057] 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.

Claims

1. An open-back headphone, characterized in that, include: The sound-emitting part includes a housing, a speaker, and a cover assembly. The housing has a receiving cavity, and the speaker is disposed in the receiving cavity. The housing has a mounting hole communicating with the receiving cavity and the outside of the sound-emitting part. The cover assembly is disposed in the mounting hole and is movable relative to the mounting hole. The cover assembly has a retracted position and an extended position relative to the mounting hole. The cover assembly has a sound outlet communicating with the receiving cavity and the outside of the sound-emitting part, and the sound outlet is opposite to the speaker. Fixing part; Ear hooks connect the sound-producing part and the fixing part; as well as Earplugs, detachably connected to the cover assembly; The portion of the cover assembly that protrudes from the outer surface of the housing when it is in the extended position can be connected to the earplug.

2. The open-back headphone according to claim 1, characterized in that, The outer surface of the housing has a first outer limiting surface, which surrounds the mounting hole. The mounting hole has a first inner limiting surface, which faces the accommodating cavity. One end of the cover assembly has a first flange, and the other end opposite to the first flange has a second flange. The first flange is located outside the mounting hole and has a first abutting surface that is opposite to the first outer limiting surface. The second flange is located in the mounting hole and has a second abutting surface that is opposite to the first inner limiting surface. When the cover assembly is in the storage position, the first abutting surface is close to the first outer limiting surface, and the second abutting surface is far away from the first inner limiting surface; When the cover assembly is in the extended position, the second abutting surface is close to the first inner limiting surface, and the first abutting surface is far away from the first outer limiting surface.

3. The open-back headphone according to claim 2, characterized in that, The mounting hole has a second outer limiting surface disposed opposite to the first abutting surface; The cover assembly includes: The outer end cap, wherein the first flange is disposed on the outer end cap: Inner end cap, connected to the outer end cap, the second flange being disposed on the inner end cap; and An elastic element abuts between the first abutting surface and the second outer limiting surface.

4. The open-back headphone according to claim 3, characterized in that, The first flange has a first fixing groove on the side facing the receiving cavity, and the end of the elastic member away from the second outer limiting surface is disposed in the first fixing groove.

5. The open-back headphone according to claim 3, characterized in that, The outer end cap has a first cylindrical portion, and the first flange is disposed at the end of the first cylindrical portion away from the receiving cavity; the inner end cap has a second cylindrical portion, and the second flange is disposed at the end of the second cylindrical portion close to the receiving cavity. The second cylindrical portion is fitted over the first cylindrical portion, or the first cylindrical portion is fitted over the second cylindrical portion.

6. The open-back headphone according to claim 3, characterized in that, The outer end cap has a first cylindrical portion, and the first flange is disposed at the end of the first cylindrical portion away from the receiving cavity; the inner end cap has a second cylindrical portion, and the second flange is disposed at the end of the second cylindrical portion close to the receiving cavity. The inner end cap has a first hole section and a second hole section. The second hole section is located at the end of the first hole section away from the accommodating cavity, and the diameter of the second hole section is larger than that of the first hole section. A stepped surface is formed at the connection between the first hole section and the second hole section. The first cylindrical part is located in the second hole section. The end of the first cylindrical part away from the first flange is opposite to the stepped surface. The elastic element is a spring, and the elastic element is sleeved on the outside of the second cylindrical part.

7. The open-back headphone according to claim 2, characterized in that, The first flange has a second fixing groove on the side opposite to the receiving cavity, and the cover assembly further includes: A dust cover is fixed in the second fixing groove, and the dust cover has multiple sound-permeable holes.

8. The open-back headphone according to claim 7, characterized in that, The dust cover includes a baffle and a fixing ring. The sound-permeable hole is provided on the baffle. The fixing ring extends from the outer edge of the baffle toward the direction close to the second flange and is fixed in the second fixing groove. The cover assembly also includes a gasket disposed between the baffle and the bottom wall of the second fixing groove.

9. The open-back headphone according to claim 2, characterized in that, The second flange has at least one limiting block, the limiting block has a second abutting surface, the sidewall of the mounting hole has at least one track groove that matches the limiting block, the track groove includes an extension limiting groove, the first inner limiting surface is disposed on the bottom wall of the extension limiting groove, the extension limiting groove has an opening at one end near the receiving cavity, the mounting hole also has a second inner limiting surface, the second inner limiting surface is disposed laterally on the opening of the extension limiting groove and is far away from the first outer limiting surface relative to the first inner limiting surface; When the cover assembly is in the storage position, the second abutting surface of the limiting block is opposite to the second inner limiting surface.

10. The open-back headphone according to claim 9, characterized in that, The second inner limiting surface has a limiting protrusion. When the cover 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 limiting surface.

11. The open-back headphone according to claim 9, characterized in that, There is a transition slope between the second inner limiting surface and the side wall of the protruding limiting groove.

12. The open-back headphone according to claim 9, characterized in that, The number of the limiting blocks and the track grooves is multiple, and the multiple track grooves are arranged circumferentially along the mounting hole. The track groove also includes a receiving limiting groove. The second inner limiting surface is disposed in the receiving limiting groove, and the protruding limiting groove extends from the bottom wall of the receiving limiting groove in a direction away from the receiving cavity.

13. The open-back headphone according to claim 12, characterized in that, The protruding limiting groove extends to the middle of the receiving limiting groove, and the two sides of the protruding limiting groove are respectively provided with the second inner limiting surface.

14. The open-back headphone according to claim 2, characterized in that, The earplug has: The main body has a sound guide channel. The main body has a first end near the mounting hole and a second end opposite to the first end. The first end has an inward flange extending toward the center of the sound guide channel. After the earplug is connected to the cover assembly, the sound guide channel is aligned with the sound outlet hole. The inward flange is located between the first outer limiting surface and the first abutting surface. as well as An arc plate, located on the outer periphery of the main body and connected at one end to the second end, the shape of the arc plate matching the shape of the human ear canal.

15. The open-back headphone according to claim 14, characterized in that, The sound guide channel has a flange mounting groove, and the side wall of the flange mounting groove away from the second end forms the inner flange between the end face of the first end and the end face of the first end. When the earplug is connected to the cover assembly, the first flange is disposed in the flange mounting groove.

16. The open-back headphone according to claim 15, characterized in that, The side of the first flange has a plurality of anti-slip protrusions spaced apart in the circumferential direction. When the earplug is connected to the cover assembly, at least one of the anti-slip protrusions contacts the bottom wall of the flange mounting groove.

17. The open-back headphone according to claim 14, characterized in that, The axis of the sound guide channel is inclined relative to the axis of the sound outlet, and the arc plate is a non-centrally symmetrical structure.

18. The open-back headphone according to claim 14, characterized in that, The outer surface of the housing has a recessed groove, the first outer limiting surface is the bottom wall of the recessed groove, and when the cover assembly is in the storage position, the first flange is at least partially accommodated in the recessed groove.

19. The open-back headphone according to any one of claims 1-18, characterized in that, The length of the cover assembly protruding from the outer surface of the housing when it is in the extended position is greater than the length of the cover assembly protruding from the outer surface of the housing when it is in the retracted position.

20. The open-back headphone according to any one of claims 1-18, characterized in that, The sound outlet has a tapering section that gradually narrows from one end near the accommodating cavity to the end away from the accommodating cavity.

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