Headphone capable of adjusting loudspeaker distance

Abstract

The invention discloses a headphone with adjustable loudspeaker distance, which comprises a headband and earmuff assemblies connected to two ends of the headband, each earmuff assembly comprises an earphone main body and a sounding unit, the earphone main body is connected with the sounding unit through a connecting arm, and the sounding unit is movably connected with the connecting arm. The sounding units can axially move relative to the earphone main body and are used for adjusting the distance between the sounding units at two ends of the headset. According to the headphone with the adjustable loudspeaker distance provided by the invention, the sounding units are movably connected with the connecting arms, so that the sounding units can move in the axial direction of the headphone main body, the distance between the two sounding units is adjusted, different listening experiences are brought to a user, and the headphone is convenient to wear by the user.

Description

Technical Field

[0001] The present invention relates to the technical field of headphones, and in particular to a headphone with adjustable speaker distance. Background Art

[0002] A headphone is an audio device that is directly worn on the user's head and ears. It mainly consists of a headband and earcups. The earcups cover the user's ears, and a sound generating unit is integrated inside the earcups. The headband connects the two earcups and is worn on the user's head. Headphones are usually used in places such as Internet cafes, music, e-sports, or professional audio production. However, in the specific application of headphones, the position of the sound generating unit in the headband is fixed, and when the user wears them, the sound generating unit mostly fits against the user's ears. For users with different head shapes, this brings certain inconveniences, and sometimes it is necessary to replace the headband of different sizes to adapt to the user. Since the position of the sound generating unit is fixed, the user's sound listening effect is single and the experience effect is poor; and keeping the sound generating unit against the ears for a long time easily makes the user feel fatigued and uncomfortable. Summary of the Invention

[0003] The purpose of the present invention is to provide a headphone with adjustable speaker distance. By the movable connection between the sound generating unit and the connecting arm, the sound generating unit can move axially in the headphone body to adjust the distance between the two sound generating units, bringing different sound listening experiences to the user and facilitating the user's wearing.

[0004] To solve the above technical problems, the technical solution provided by the present invention is: a headphone with adjustable speaker distance, including a headband and earcup assemblies connected to both ends of the headband. The earcup assemblies include a headphone body and a sound generating unit. The headphone body is connected to the sound generating unit through a connecting arm, and the sound generating unit is movably connected to the connecting arm. The sound generating unit can move axially relative to the headphone body to adjust the distance between the sound generating units at both ends of the headband.

[0005] With the above technical solution of the present invention, the headphone body is connected to the sound generating unit through the connecting arm, and the sound generating unit is movably connected to the connecting arm and can move positions on the connecting arm, so that the sound generating unit can move axially relative to the headphone body, thereby adjusting the relative distance between the two sound generating units. By adjusting the distance between the two sound generating units, during wearing, the sound generating unit will not press against the user's ears, and the user will not feel discomfort even after long-term use; and by adjusting the distance, different sound listening experiences can be brought to the user.

[0006] The above-mentioned headphone with adjustable speaker distance is provided with an installation groove on the sound-emitting unit. The end of the connecting arm is slidably embedded in the installation groove, and the sound-emitting unit can move on the end of the connecting arm through the installation groove. The installation groove cooperates with the connecting arm to enable the sound-emitting unit to slide relative to the end of the connecting arm, thereby moving the position of the sound-emitting unit, realizing the adjustment of the distance between the sound-emitting units. By adjusting the distance between the sound-emitting units, the distance between each sound-emitting unit and the eardrum in the ear canal can be adjusted, enabling the user to experience different sound qualities brought by different distances when wearing the headphones to listen to music.

[0007] For the above-mentioned headphone with adjustable speaker distance, a clamping flange is provided on the outer side of the bottom of the connecting arm, and the installation groove of the sound-emitting unit slidably sleeved the clamping flange. The clamping flange is embedded in the groove wall of the installation groove, so that the sound-emitting unit will not come out of the end wall of the connecting arm, improving the firmness of the connection.

[0008] For the above-mentioned headphone with adjustable speaker distance, a ball plunger is provided at the end of the connecting arm, and a gear elastic sheet is provided on the installation groove. A number of positioning grooves are spaced on the surface of the gear elastic sheet, and the ball plunger correspondingly abuts against the positioning grooves to adjust the position of the sound-emitting unit. When the ball plunger abuts against the positioning groove on the gear elastic sheet, it presses tightly against the sound-emitting unit so that the sound-emitting unit cannot move further. When the ball plunger does not abut against the positioning groove on the gear elastic sheet, the spring in the ball plunger is compressed, and the sound-emitting unit can continue to move. Through the setting of a number of positioning grooves, the user can freely adjust different gears of the distance between the sound-emitting unit and the eardrum, which is convenient for selection and use.

[0009] For the above-mentioned headphone with adjustable speaker distance, metal barbs extend inward from the back of the gear elastic sheet. The metal barbs are used to pierce into the bottom of the installation groove, playing a role in fixing the gear elastic sheet. When fixing the gear elastic sheet, only need to press to make the metal barbs pierce into the sound-emitting unit housing made of rubber material, which is convenient for operation and reduces the complex process flow.

[0010] For the above-mentioned headphone with adjustable speaker distance, the ball plunger includes a plunger body, a spring and a plunger rod. The plunger body is provided with a semi-closed plunger groove. One end of the plunger rod extends into the plunger groove, and the outer end forms a hemispherical end. The two ends of the spring respectively abut against the plunger groove and the hemispherical end. The spring is used to provide elastic force to keep the plunger rod pushed outwards. The hemispherical end is used to abut against the gear elastic sheet. When the hemispherical end abuts against the positioning groove, the plunger rod extends out of the plunger groove to the farthest distance, pressing tightly against the gear elastic sheet to fix the position of the sound-emitting unit relative to the connecting arm.

[0011] For the above-mentioned headphone with adjustable speaker distance, a radial inner edge extends radially inward from the groove diameter of the plunger groove, and a radial outer edge is formed on the inner side of the hemispherical end. The plunger rod extends into the plunger groove and is limited within the radial inner edge by the radial outer edge. The radial outer edge abuts against the radial inner edge, which can limit the plunger rod from running out of the plunger groove.

[0012] For the above-mentioned headphone with adjustable speaker distance, an assembly hole is provided at the end of the connecting arm, and the ball plunger is arranged in the assembly hole.

[0013] For the above-mentioned headphone with adjustable speaker distance, the headphone body is in a circular ring shape, and the sound-emitting unit is located at the axis of the headphone body. The sound-emitting unit is located at the axis of the headphone body, which can be aligned with the user's ear canal, and different listening experiences can be brought to the user when adjusting the distance between the two sound-emitting units.

[0014] The beneficial effects achieved by the present invention are as follows: The sound-emitting unit is movably connected to the connecting arm, and through the cooperation of the ball plunger and the gear elastic piece, the distance gear adjustment can be realized while adjusting the position of the sound-emitting unit; by adjusting the distance between the two sound-emitting units, the user can adjust by himself and experience different listening experiences when wearing, and it is convenient to wear; through adjustment, the sound-emitting unit will not directly abut against the user's ear, and discomfort will not be generated during long-term listening, improving the wearing comfort. Brief Description of the Drawings

[0015] Figure 1 It is a schematic perspective view of a headphone with adjustable speaker distance according to the first embodiment of the present invention; Figure 2 It is a schematic diagram of the speaker adjustment structure of a headphone with adjustable speaker distance according to the first embodiment of the present invention; Figure 3 It is a schematic cross-sectional structure diagram of the earcup assembly of a headphone with adjustable speaker distance according to the first embodiment of the present invention; Figure 4 It is Figure 3 An enlarged structure diagram of position B in Figure 5 A schematic diagram of the structure in which the ball plunger of the first embodiment of the present invention is arranged on the first connecting arm; Figure 6 It is a schematic cross-sectional structure diagram of the ball plunger of the first embodiment of the present invention; Figure 7 It is a schematic diagram of the cooperation structure of the ball plunger and the gear elastic piece of the first embodiment of the present invention; Figure 8 It is a schematic diagram of the structure of the gear elastic piece of the first embodiment of the present invention; Figure 9 It is a schematic diagram of the structure of the sound-emitting unit of the first embodiment of the present invention; Figure 10 It is a schematic exploded view of opening the rear cover according to the second embodiment of the present invention; Figure 11 It is a schematic diagram of the earcup assembly according to the second embodiment of the present invention; Figure 12 It is a schematic cross-sectional structure diagram of the earcup assembly according to the second embodiment of the present invention; Figure 13 It is an exploded structural schematic diagram of the earcup assembly according to the second embodiment of the present invention; Figure 14 It is a connection structural schematic diagram of the earcup assembly and the earcup connecting member according to the second embodiment of the present invention; Figure 15 is Figure 14 an enlarged structural schematic diagram of position A in Figure 16 It is a side view structural schematic diagram of the earcup assembly according to the second embodiment of the present invention; Figure 17 It is a structural schematic diagram of the earcup connecting member according to the second embodiment of the present invention; Figure 18 It is a structural schematic diagram of the earcup connecting member connecting to the headband according to the second embodiment of the present invention; Figure 19 It is an exploded structural schematic diagram of the earcup connecting member according to the second embodiment of the present invention; Figure 20 It is a structural schematic diagram of the sound generating unit according to the third embodiment of the present invention; Figure 21 It is a sectional structural schematic diagram of the earcup assembly according to the third embodiment of the present invention; Figure 22 It is a sectional structural schematic diagram of the sound generating unit according to the third embodiment of the present invention; Figure 23 It is a structural schematic diagram of the speaker front cavity bracket according to the third embodiment of the present invention; Figure 24 It is an exploded structural schematic diagram of the earcup assembly according to the fourth embodiment of the present invention; Figure 25 It is an internal structural sectional view of the earcup assembly according to the fourth embodiment of the present invention.

[0016] Description of reference numerals: Headgear 1, earcup connecting member 11, circular opening 111, rotating support shaft 112, clamping block 113, limiting block 114, connecting member bottom shell 115, connecting member face cover 116, connecting portion 117, mounting block 118, hinged portion 12, hinged rod 121, rotating portion 122, earcup assembly 2, headphone main body 21a, connecting arm 21b, release hole 201, earcup rear cover 202, rear cover outer shell 203, rear cover inner shell 204, first magnetic attraction magnet 205, second magnetic attraction magnet 206, magnet groove 207, headphone main body outer shell 211, headphone main body inner shell 212, accommodating rack 213, speaker rear cover 214, first connecting arm 215, second connecting arm 216, assembly hole 217, ball plunger 218, rotating hole 2111, positioning block 2112, sponge ring 2121, clamping washer 2122, hook portion 2123, sound passing hole 2131, clamping flange 2151, plunger body 2181, spring 2182, plunger rod 2183, plunger groove 2184, hemispherical end portion 2185, radially inner edge 2186, radially outer edge 2187, sounding unit 3, speaker front cavity bracket 301, bass speaker 302, PCBA main board 303, speaker rear cavity bracket 304, reflecting sound cone 305, mid - high speaker 306, speaker component upper shell 307, speaker component bottom shell 308, mounting groove 309, annular chassis 311, connecting plate 312, screw post 313, speaker mounting seat 314, speaker opening 315, connecting ear 341, mounting post 342, gear elastic piece 371, positioning groove 372, barbs 373. Detailed implementation manners

[0017] The present invention will be further described below in conjunction with the drawings and detailed implementation manners. Embodiment

[0018] Refer to Figures 1 to 9 As shown, an adjustable - speaker - distance headphone includes a headgear 1 and earcup assemblies 2 connected to both ends of the headgear 1. The earcup assemblies 2 include a headphone main body 21a and a sounding unit 3. The headphone main body 21a is connected to the sounding unit 3 through a connecting arm 21b. The sounding unit 3 is movably connected to the connecting arm 21b. The sounding unit 3 can axially move relative to the headphone main body 21a to adjust the distance between the sounding units 3 at both ends of the headgear 1. The sounding unit 3 can move relative to the earcup assembly 2, so that the sounding units 3 at both ends of the headgear 1 can adjust their relative distances, thereby adjusting the distance between the sounding unit 3 and the ear canal when worn.

[0019] In this embodiment, the headphone main body 21a is in a circular ring shape, and the sounding unit 3 is located at the axis of the headphone main body 21a. The headphone main body 21a in a circular ring shape can wrap the user's ear. The sounding unit 3 located at the axis position of the headphone main body 21a can be aligned with the user's ear canal, so that the sound emitted by the sounding unit 3 is transmitted towards the ear canal, improving the sound - listening effect.

[0020] As Figure 3 shown, the sound generating unit 3 includes a horn component upper shell 307 and a horn component bottom shell 308, the earphone main body 21a includes an earphone main body outer shell 211 and an earphone main body inner shell 212, and the connecting arm 21b includes a first connecting arm 215 and a second connecting arm 216. The earphone main body outer shell 211 is connected to the horn component upper shell 307 through the first connecting arm 215, and the earphone main body inner shell 212 is connected to the horn component bottom shell 308 through the second connecting arm 216.

[0021] The sound generating unit 3 includes a horn front cavity bracket 301, a bass horn 302, a PCBA main board 303, a horn rear cavity bracket 304, and a mid-high horn 306. A horn mounting seat 314 is provided on the horn front cavity bracket 301, the mid-high horn 306 is mounted on the horn mounting seat 314, the bass horn 302 is mounted on the annular chassis 311 of the horn front cavity bracket 301, and then the horn rear cavity bracket 304 is fixedly connected to the horn front cavity bracket 301. The PCBA main board 303 is mounted on the rear side of the horn rear cavity bracket 304, and the leads of the mid-high horn 306 and the bass horn 302 are respectively welded to the PCBA main board 303. Finally, the horn front cavity bracket 301 and the horn rear cavity bracket 304 are assembled between the horn component upper shell 307 and the horn component bottom shell 308 to complete the assembly of the sound generating unit 3.

[0022] Referring to Figure 5 and Figure 9 shown, it is a schematic structural diagram of the position where the ball plunger 218 is mounted on the first connecting arm 215 in this embodiment. Specifically, an assembly hole 217 is provided at the end of the first connecting arm 215 connecting the horn component upper shell 307, and the ball plunger 218 is assembled in the assembly hole 217. An installation groove 309 is provided on the sound generating unit 3, and the end of the connecting arm 21b is slidably embedded in the installation groove 309. The sound generating unit 3 can move on the end of the connecting arm 21b through the installation groove 309. A clamping flange 2151 is provided on the outer side of the bottom of the connecting arm 21b, and the installation groove 309 of the sound generating unit 3 slidably sleeved the clamping flange 2151.

[0023] Referring to Figure 3 and Figure 4 shown, a ball plunger 218 is provided at the end of the connecting arm 21b, a gear elastic piece 371 is provided on the installation groove 309, a plurality of positioning grooves 372 are provided at intervals on the surface of the gear elastic piece 371, and the ball plunger 218 correspondingly abuts against the positioning grooves 372 to adjust the position of the sound generating unit 3. In this embodiment, the number of the positioning grooves 372 is set to four, as Figure 7 and Figure 8As shown, the ball head plunger 218 correspondingly abuts against the positioning grooves 372 at different positions to achieve the adjustment of the distance adjustment gears of the sound generating unit 3. In other embodiments, the number of the positioning grooves 372 can also be set to other numbers, such as 2 or 3, etc., which are selected according to the actual use situation.

[0024] An assembly hole 217 is provided at the end of the connecting arm 21b, and the ball head plunger 218 is arranged in the assembly hole 217. The upper shell 307 of the horn component is slidably and cooperatively connected with the first connecting arm 215, and the upper shell 307 of the horn component can be adjusted to slide relative to the first connecting arm 215, thereby adjusting the relative positions of the upper shells 307 of the two horn components located at both ends of the headgear 1, and thus adjusting the distance between the sound generating unit 3 and the ear canal. An assembly hole 217 is provided at the contact part between the first connecting arm 215 and the upper shell 307 of the horn component, and the ball head plunger 218 is arranged in the assembly hole 217; a gear elastic piece 371 is provided on the upper shell 307 of the horn component, and the ball head plunger 218 contacts and cooperates with the gear elastic piece 371 to enable the upper shell 307 of the horn component to slide relative to the end of the first connecting arm 215, and the position of the sound generating unit 3 is fixed by the ball head plunger 218 abutting against the gear elastic piece 371, thereby realizing the adjustment of the distance of the sound generating unit 3 relative to the ear. By adjusting the distance of the sound generating unit 3 relative to the ear, different listening effects can be experienced by the user.

[0025] Refer to Figure 6 As shown, specifically, the ball head plunger 218 includes a plunger body 2181, a spring 2182 and a plunger rod 2183. The plunger body 2181 is provided with a semi-closed plunger groove 2184. One end of the plunger rod 2183 extends into the plunger groove 2184, and the outer end forms a hemispherical end 2185. A radially inner edge 2186 extends radially inward from the groove diameter of the plunger groove 2184. A radially outer edge 2187 is formed on the inner side of the hemispherical end 2185. The spring 2182 is arranged in the plunger groove 2184, and its two ends respectively abut against the bottom wall of the plunger groove 2184 and the inner side of the hemispherical end 2185. Through the cooperation of the radially outer edge 2187 and the radially inner edge 2186, the hemispherical end 2185 and the plunger rod 2183 will not run out of the plunger groove 2184. In other embodiments, the end of the plunger rod 213 can also be set as a spherical end with a diameter larger than the inner diameter of the plunger groove opening to prevent the plunger rod 2183 from running out of the plunger groove 2184.

[0026] Refer to Figure 7 And Figure 8As shown, positioning grooves 372 adapted to the surface of the hemispherical end 2185 are provided at intervals on the surface of the gear elastic piece 371. The spring 2182 pushes the hemispherical end 2185 of the plunger rod 2183 to protrude outward. When the hemispherical end 2185 of the plunger rod 2183 abuts against the gear elastic piece 371 between the positioning grooves 372, at this time, the plunger rod 2183 and the spring 2182 are compressed into the plunger groove 2184, and the sounding unit 3 can still move; when the hemispherical end 2185 of the plunger rod 2183 abuts against the positioning groove 372, the spring 2182 pushes the plunger rod 2183 to protrude and clamp the gear elastic piece 371, thereby fixing the position of the sounding unit 3.

[0027] Since the hemispherical end 2185 of the plunger rod 2183 abuts against the positioning groove 372 of the gear elastic piece 371 to complete the clamping and fixing of the sounding unit 3, the pressure is mainly provided by the elastic force of the spring 2182. When the force for moving the sounding unit 3 is large enough to overcome the elastic force of the spring 2182, the hemispherical end 2185 of the plunger rod 2183 moves into the plunger groove 2184 under the extrusion of the gear elastic piece 371, and compresses the spring to store elastic force, and continues to move the position of the sounding unit 3, so that the sounding unit 3 can move relative to the first connecting arm 215. After the sounding unit 3 moves to the required position, the positioning groove 372 corresponds to the plunger rod 2183, and the spring 2182 pushes the plunger rod 2183 to protrude outward and abut against the gear elastic piece 371, thereby realizing the adjustment of the position of the sounding unit 3.

[0028] As Figure 9 shown, mounting grooves 309 for accommodating and locking the first connecting arm 215 are provided on the bottom case 308 of the horn component and the upper case 307 of the horn component. A clamping flange 2151 is provided on the outer side of the bottom of the first connecting arm 215. As Figure 5 shown, the clamping flange 2151 is snapped into the inner wall of the mounting groove 309, so as to prevent the sounding unit 3 from detaching from the first connecting arm 215. Among them, when connecting the first connecting arm 215 with the upper case 307 and the bottom case 308 of the horn component, the clamping flange 2151 of the first connecting arm 215 is first snapped into the upper case 307 of the horn component, and then the bottom case 308 of the horn component is assembled on the upper case 307 of the horn component. After the assembly is completed, the first connecting arm 215 cannot be separated from the mounting groove 309.

[0029] As Figure 8As shown in the figure, the back surface of the gear elastic piece 371 is provided with inwardly extending metal barbs 373, and the barbs 373 are inserted into the rubber surface of the upper shell 307 of the horn component, thereby fixing the gear elastic piece 371 on the upper shell 307 of the horn component. Thus, during the process of moving the sound emitting unit 3, the gear elastic piece 371 will not detach from the surface of the upper shell 307 of the horn component. By means of the barbs 373 being inserted into the surface of the mounting groove 309 of the upper shell 307 of the horn component to fix the gear elastic piece 371, pressure can be provided by a tool to cause the barbs 373 of the gear elastic piece 371 to penetrate the surface of the mounting groove 309, with a firm connection and a simplified process.

[0030] During assembly, the mid-high frequency horn 306 and the low frequency horn 302 are respectively installed on the horn mounting seat 314 and the annular chassis 311. Then, the front cavity bracket 301 and the rear cavity bracket 304 of the horn are assembled, the PCBA main board 303 is assembled, and the audio leads connecting the mid-high frequency horn 306 and the low frequency horn 302 are connected to the PCBA main board 303. Then, the front cavity bracket 301 and the rear cavity bracket 304 are together installed on the bottom shell 308 of the horn component. When the front cavity bracket 301 and the rear cavity bracket 304 are installed in the bottom shell 308 of the horn component, they can be adhesively fixed with glue. The gear elastic piece 371 is pressed into the upper shell 307 of the horn component to firmly connect the gear elastic piece 371 with the upper shell 308 of the horn component. The ball head plunger 218 is assembled in the assembly hole 217 of the first connecting arm 215, and then the first connecting arm 215 is inserted into the mounting groove 309. The clamping flange 2151 of the first connecting arm 215 is stuck in the mounting groove 309 to complete the connection between the first connecting arm 215 and the sound emitting unit 3. Among them, the end of the first connecting arm 215 can also be placed in the mounting groove 309 on the upper shell 307 of the horn component, and then the upper shell 307 of the horn component is assembled. The upper shell 307 of the horn component is connected to the bottom shell 307 of the horn component by glue, so that the first connecting arm 215 is positioned in the mounting groove 309. Finally, the headphone main body housing 211 and the headphone main body inner housing 212 are assembled into one body by screws. Embodiment

[0031] Referring to Figures 1 to 19 As shown in the figure, on the basis of Embodiment 1, this Embodiment 2 of the headphone further includes a headband 1 and earcup assemblies 2 connected to both ends of the headband 1. The earcup assemblies 2 include a headphone main body 21a and a sound emitting unit 3. The headphone main body 21a is connected to the sound emitting unit 3 through a connecting arm 21b. Among them, the sound emitting unit 3 is located at the central position of the earcup assembly 2, and an open release hole 201 axially penetrating along the earcup assembly 2 is formed between the sound emitting unit 3 and the inner periphery of the earcup assembly 2. The release hole 201 is in a bent U shape. Correspondingly, an earcup rear cover 202 for covering the release hole 201 is detachably provided at the rear side of the earcup assembly 2, and the earcup rear cover 202 is adapted to the shape and size of the release hole 201.

[0032] Referring to Figure 1 and Figure 10 As shown, during use, the headset is worn on the user's head, and the earcup assembly 2 covers the user's ears. When the earcup back cover 202 is assembled on the earcup assembly 2 and the earcup back cover 202 covers the release hole 201, so that when the earcup assembly 2 wraps the user's ears, a closed sound listening space is formed between the earcup assembly 2 and the user's ear canal, enabling sound to be transmitted to the eardrum and enhancing the user's immersion in listening; and after installing the earcup back cover 202, it can achieve a sound insulation effect. When it is necessary to protect the privacy of the call, installing the earcup back cover 202 can isolate the leakage of sound. After installing the earcup back cover 202, it is suitable for occasions such as Internet cafes, e-sports, and professional audio production.

[0033] When using the headset for a long time, since a closed sound listening space is formed between the earcup assembly 2 and the user's ears, wearing it for a long time with too closed a sound listening environment will cause discomfort. At this time, remove the earcup back cover 202 to connect the sound listening space with the outside world and release the sound pressure to improve the discomfort. After opening the earcup back cover 202, the user can not only hear the sound emitted by the headset but also hear the sounds of the surrounding environment outside. It is suitable for scenarios where it is necessary to promptly perceive the sounds of the surrounding environment, such as outdoor activities and other occasions. After removing the earcup back cover 202, the inside of the earcup assembly 2 is connected to the outside through the release hole 201, allowing air to circulate. The ears dissipate heat quickly and are not prone to sweating; more sound waves are allowed to escape from the rear of the sound emitting unit 3, reducing the reflection and echo of sound around the ears, and the naturalness of the sound is high.

[0034] Referring to Figures 11 to 13As shown, the earphone main body 21a includes an earphone main body outer shell 211 and an earphone main body inner shell 212. A sounding unit 3 is disposed in the space formed by enclosing between the earphone main body outer shell 211 and the earphone main body inner shell 212. The earcup rear cover 202 includes a rear cover outer shell 203 and a rear cover inner shell 204. The rear cover outer shell 203 and the rear cover inner shell 204 can be connected by a snap-fastening method. In other embodiments, the rear cover outer shell 203 and the rear cover inner shell 204 can also be connected by other forms, such as bonding, connecting by screws, etc. A first magnetic attraction magnet 205 is disposed on the rear cover inner shell 204, and a second magnetic attraction magnet 206 is disposed in a magnet groove 207 of the earphone main body outer shell 211. The first magnetic attraction magnet 205 and the second magnetic attraction magnet 206 are opposite in position, and the polarities of the opposite end faces are opposite. When the first magnetic attraction magnet 205 approaches the second magnetic attraction magnet 206, they are attracted and joined by magnetic attraction force, so as to attract and fix the earcup rear cover 202 on the outer side of the earphone main body outer shell 211, realizing the assembly of the earcup rear cover 202. The method of using the mutual attraction of the first magnetic attraction magnet 205 and the second magnetic attraction magnet 206 to install the earcup rear cover 202 makes it more convenient for the user to disassemble and assemble the earcup rear cover 202 on the earphone main body outer shell 211. Wherein, the earcup rear cover 202 is configured to include a rear cover outer shell 203 and a rear cover inner shell 204, which is used for when the rear cover outer shell 203 and the rear cover inner shell 204 are assembled with each other to form the earcup rear cover 202, the first magnetic attraction magnet 205 is installed inside the earcup rear cover 202 without being exposed.

[0035] In other embodiments, the earcup rear cover 202 and the earcup assembly 2 can also be fixedly connected by a snap-fastening connection method. For example, snap-fasteners are disposed on the earphone main body outer shell 211, and snap holes or snap grooves are disposed on the earcup rear cover 202. The earcup rear cover 202 and the earphone main body outer shell 211 are detachably connected by snap-fasteners. The earcup rear cover 202 and the earphone main body outer shell 211 can also be detachably connected by a screw connection method. For example, screw holes are disposed on the outer side edge of the earphone main body outer shell 211, through holes for passing screws are disposed at positions corresponding to the screw holes on the earcup rear cover 202, and after the locking screws pass through the through holes of the earcup rear cover 202, they are threadedly connected to the screw holes of the earphone main body outer shell 211 to complete the connection of the earcup rear cover 202 and the earcup assembly 2. The disassembly connection between the earcup rear cover 202 and the earcup assembly 2, the specific connection method can be selected according to actual use requirements.

[0036] Referring to Figures 14 to 19 As shown, the earcup assembly 2 and the headband 1 are connected by an earcup connecting member 11. One end of the earcup connecting member 11 is inserted into the headband 1, the other end of the earcup connecting member 11 is provided with an arc-shaped opening, the earcup connecting member 11 is integrally Y-shaped, and the arc-shaped opening of the earcup connecting member 11 is rotatably connected to the earcup assembly 2, so that the earcup assembly 2 can rotate in the opening to adjust its angle for easy wearing.

[0037] In this embodiment, the end of the earmuff connector 11 connected to the earmuff assembly 2 is an arc-shaped opening 111, and the two ends of the arc-shaped opening 111 protrude inward with a rotation support shaft 112. The radial outer wall of the earphone main body shell 211 of the earmuff assembly 2 is provided with a rotation hole 2111 that can be rotatably sleeved on the rotation support shaft 112. The rotation support shaft 112 of the earmuff connector 11 is inserted into the rotation hole 2111 on the side wall of the earphone main body shell 211, so that the earmuff assembly 2 can be rotated on the earmuff connector 11, thereby adjusting the angle of the earmuff assembly 2, which is convenient for users to wear. Figure 14 and Figure 15 As shown, a clamping block 113 extends radially outward from the outer end of the rotation support shaft 112, and when the rotation support shaft 112 is inserted into the rotation hole 2111, it is clamped on the inner bottom wall of the rotation hole 2111 through the clamping block 113, so that the earmuff assembly 2 will not be separated from the rotation support shaft 112. The rotation support shaft 112 is hollow along the axial direction and communicates with the inner cavity of the earmuff connector 11 for passing cables.

[0038] Combination Figure 16 and Figure 17 Furthermore, a radially spaced limit block 114 is provided at one end of the rotating support shaft 112 near the arc-shaped end of the earmuff connector 11, and a positioning block 2112 cooperating with the limit block 114 is provided radially inwardly on the hole wall of the rotating hole 2111, wherein the positioning blocks 2112 are spaced apart on the hole wall of the rotating hole 2111, and the spacing of the positioning blocks 2112 allows the rotating support shaft 112 to pass through. The positioning block 2112 is embedded in the spacing between the two limit blocks 114, and the positioning block 2112 can abut against the limit block 114 during rotation, thereby limiting the rotation angle of the earmuff assembly 2 relative to the rotating support shaft 112. The rotating support shaft 112 is inserted into the rotating hole 2111, and the earmuff assembly 2 rotates around the rotating support shaft 112, and the positioning block 2112 touches the limit block 114, thereby limiting the rotation angle of the earmuff assembly 2.

[0039] like Figure 18 As shown, the earmuff connector 11 is connected to the headband 1 via a hinge portion 12. A hinge rod 121 is inserted at the top of the hinge portion 12. Figure 17 As shown. The hinged portion 12 is rotatably connected to the end of the headband 1 via a hinged rod 121. Through the rotatable connection between the earmuff connector 11 and the headband 1, when the earphones are not in use, the two earmuff assemblies 2 can be rotated relative to the inner side of the headband 1, so that the two earmuff assemblies 2 can be folded inside the headband 1 for easy storage. Furthermore, a rotating portion 122 is extended from the bottom end of the hinged portion 12 toward the earmuff assembly 2, and a connecting portion 117 is provided at the top end of the earmuff connector 11. The earmuff connector 11 is rotatably connected to the rotating portion 122 via the connecting portion 117. Specifically, as shown Figure 18As shown, the rotating part 122 is provided with a rotating card slot 1221, and a clamping slot 1171 that matches the rotating card slot 1221 of the rotating part 122 is provided inside the connecting part 117. Refer to Figure 11 As shown, an installation block 118 is detachably provided on the connecting part 117 through screws, so that the earcup connecting piece 11 is connected to the hinged part 12.

[0040] Refer to Figure 18 and Figure 19 As shown, in this embodiment, the rotating card slot 1221 and the clamping slot 1171 are annular slots. The rotating card slot 1221 is an outer annular slot opened around the outer peripheral wall surface of the rotating part 122; the clamping slot 1171 is an inner annular slot opened around the inner peripheral wall of the connecting part 117. The installation block 118 is used to fixedly connect the rotating part 122 and the connecting part 117 by screw fixation when the rotating part 122 is embedded in the connecting part 117. A clamping slot 1171 is also provided inside the installation block 118 along its inner peripheral wall, forming a clamping slot 1171 that wraps the bottom of the rotating card slot 1221 when the connecting part 117 is installed. Specifically, the slot wall of the rotating card slot 1221 is embedded in the clamping slot 1171, and the slot wall of the clamping slot 1171 is embedded in the rotating card slot 1221, so that the rotating part 122 is connected to the connecting part 117, and the earcup connecting piece 11 can rotate relative to the rotating part 122 through the connecting part 117, thereby realizing the axial rotation of the earcup assembly 2 in the extending direction relative to the headband 1 around the axis of the rotating part 122, and further adjusting the angle of the earcup assembly 2. When wearing the headphones, the earcup assembly 2 can freely rotate after touching the user's ear, making it more convenient to wear on the user's head.

[0041] Refer to Figure 13 As shown, a sponge ring 2121, a clamping washer 2122, and a hook part 2123 are provided on the inner side surface of the inner shell 212 of the headphone main body. The hook parts 2123 are distributed at intervals in a ring shape along the edge of the inner shell 212 of the headphone main body. The clamping washer 2122 is embedded inside the sponge ring 2121 and the clamping washer 2122 is clamped on the hook part 2123, thereby assembling the sponge ring 2121 on the inner side surface of the inner shell 212 of the headphone main body. The sponge ring 2121 contacts the user's head skin, which can buffer the pressure of the earcup assembly on the head when wearing the headphones, improving the wearing comfort; and better sealing the earcup assembly 2 and the user's ear, cooperating with the earcup rear cover 20 to form a closed sound listening space. Sound is emitted from the sound emitting unit 3, and cooperating with the earcup rear cover 202 covering the release hole 201, it can prevent sound leakage and improve the user's immersive sound listening experience. When the climate is cold, cooperating with the earcup rear cover 202 to be hermetically covered on the release hole 201, the earcup assembly 2 wraps the user's ear as a whole, having the effect of sealing and keeping warm.

[0042] As Figure 12As shown in the figure, the sound generating unit 3 includes a front cavity bracket 301 of the speaker, a woofer 302, a PCBA main board 303, and a rear cavity bracket 304 of the speaker. The woofer 302 is assembled between the front cavity bracket 301 and the rear cavity bracket 304 of the speaker, and the PCBA main board 303 is assembled outside the rear cavity bracket 304 of the speaker. After the woofer 302 and the PCBA main board 303 are assembled on the front cavity bracket 301 and the rear cavity bracket 304 of the speaker, they are assembled into the inner shell 211 and the outer shell 212 of the headphone body. Among them, the woofer 302 includes a woofer diaphragm, a woofer voice coil, a magnetic conductive sheet, and a neodymium iron boron magnet. When the woofer voice coil is powered on, a magnetic field is generated. Combining with the magnetic field of the neodymium iron boron magnet, the woofer voice coil drives the woofer diaphragm to vibrate and generate sound. Among them, one of the two earcup assemblies 2 is also equipped with a battery, and the battery is respectively connected to the PCBA main boards 303 located in the two earcup assemblies 2 through wires to provide power.

[0043] Referring to Figure 12 and Figure 13 As shown in the figure, a receiving frame 213 for accommodating the sound generating unit 3 is provided on the inner shell 212 of the headphone body, and a speaker rear cover 214 adapted to the receiving frame 213 is provided on the outer shell 211 of the headphone body. Among them, the receiving frame 213 and the speaker rear cover 214 are located at the center of the earcup assembly 2, so that the sound generating unit 3 can be aligned with the user's ear canal. The connecting arm 21b includes a first connecting arm 215 and a second connecting arm 216. The receiving frame 213 and the speaker rear cover 214 are respectively connected to the outer shell 211 and the inner shell 212 of the headphone body through the first connecting arm 215 and the second connecting arm 216. The first connecting arm 215 and the second connecting arm 216 are made of plastic in this embodiment and are used to support and position the sound generating unit 3. In other embodiments, the materials of the first connecting arm 215 and the second connecting arm 216 can also be made of elastic materials, so that the first connecting arm 215 and the second connecting arm 216 have elasticity, and the outer part of the receiving frame 213 can be closely attached to the ear canal of the ear, improving the sound quality.

[0044] Referring to Figure 19 As shown in the figure, the earcup connector 11 includes a connector bottom shell 115 and a connector face cover 116. The connector face cover 116 is covered on the connector bottom shell 115, and its internal cavity can be used to pass and guide the cable. Embodiment

[0045] Referring to Figures 20 to 23As shown in the figure, based on the second embodiment, in the third embodiment, the rear cavity bracket 304 of the speaker and the front cavity bracket 301 of the speaker are assembled into one body, and the bass speaker 302 and the PCBA main board 303 are assembled therein to form a sound generating unit 3. The front cavity bracket 301 of the speaker is fixed on the inner shell 212 of the earphone body. The outer shell 211 and the inner shell 212 of the earphone body can be connected by screws to form the earphone body of the earcup assembly 2, and the sound generating unit 3 is assembled in the accommodation rack 213 of the earcup assembly 2.

[0046] A reflection sound cone 305 is provided at the inner center of the front cavity bracket 301 of the speaker. The reflection sound cone 305 protrudes towards the direction of the bass speaker 302. The reflection sound cone 305 is conical in shape and is coaxial with the center line of the bass speaker 302. When the bass speaker 302 emits sound, its sound waves propagate forward. When the sound waves at the central position pass through the reflection sound cone 305, they are reflected by the surface of the reflection sound cone 305 and spread around. Sound passing holes 2131 for passing sound waves are distributed on the surface of the accommodation rack 213. The sound waves reflected by the conical surface of the reflection sound cone 305 spread around and pass out from the sound passing holes 2131. Through the reflection of the reflection sound cone 305, the sound spreads 360 degrees around through the reflection of the reflection sound cone 305, reducing the impact of the sound waves on the eardrum when reaching the human eardrum and making the heard sound softer. The sound waves emitted by the bass speaker 302 are centered on the reflection sound cone 305 and spread in all directions. During the process of entering the human ear, the low-frequency sound waves can be transmitted inward along the ear canal wall, reducing the direct impact on the central part of the human eardrum and making the sound listening softer.

[0047] Specifically, when the bass speaker 302 is powered on and vibrates to emit sound waves, the sound waves propagate towards the direction of the front cavity bracket 301 of the speaker. During the propagation, the sound waves located at the periphery pass through the outer periphery of the reflection sound cone 305 and then pass out through the sound passing holes 2131 of the accommodation rack 213, and the sound waves enter the user's ear canal. Another part of the sound waves located at the center, when propagating forward, pass through the surface of the reflection sound cone 305 and radiate around through the conical surface of the reflection sound cone 305, and a part of the sound waves directly pass out through the sound passing holes 2131 of the accommodation rack 213. Through the setting of the reflection sound cone 305, the bass emitted by the bass speaker 302 enters the ear canal in a way that spreads around with the reflection sound cone 305 as the center. And the sound passing holes 2131 of the accommodation rack 213 are annularly distributed with the reflection sound cone 305 as the center, and no sound holes are provided at the central part of the accommodation rack 213. This enables the bass sound waves to avoid more central transmission and transmit along the surface of the ear canal, reducing the direct radiation to the center of the eardrum and making the sound listening feeling softer.

[0048] As Figure 23As shown, the front cavity bracket 301 of the loudspeaker in this embodiment includes an annular chassis 311 and a connecting plate 312 connected to the surface of the annular chassis 311. There are four connecting plates 312 arranged at intervals. One end of the connecting plate 312 is connected to the annular chassis 311, and the other end converges towards the axis and is connected as a whole. The reflecting sound cone 305 is arranged at the end where the connecting plates 312 converge into one body, and the reflecting sound cone 305 extends and protrudes towards the direction of the woofer 302. Among them, the end of the reflecting sound cone 305 connected to the connecting plate 312 is integrally formed and extends towards the direction of the woofer 302 to form an integral structure. The integrally formed reflecting sound cone 305 can be processed by cold pressing during processing. The middle part bulges from the end connected to the connecting plate 312 by cold pressing to form the cylindrical reflecting sound cone 305. In other embodiments, the reflecting sound cone 305 can also be a split structure and is installed and fixed at the converging part of the connecting plate 312. The reflecting sound cone 305 is in the shape of a cone, and when diffusing the sound waves transmitted from the woofer 302 on its surface, it can radiate the sound waves more evenly in all directions.

[0049] As Figure 20 , the edge of the front cavity bracket 301 of the loudspeaker extends towards the direction of the rear cavity bracket 304 of the loudspeaker to form a screw post 313. The edge of the rear cavity bracket 304 of the loudspeaker is provided with a connecting ear 341 corresponding to the position of the screw post 313. The connecting ear 341 is provided with a through hole, and the rear cavity bracket 304 of the loudspeaker is connected to the front cavity bracket 301 of the loudspeaker by passing a screw through the through hole. There is an installation post 342 on the rear side of the rear cavity bracket 304 of the loudspeaker, and the PCBA main board 303 can also be installed and fixed on the installation post 342 by screw connection.

[0050] During assembly, first, the front cavity bracket 301 of the loudspeaker is glued to the accommodation bracket 213 of the inner shell 212 of the earphone body, and then the woofer 302 is glued to the front cavity bracket 301 of the loudspeaker. Then, the rear cavity bracket 304 of the loudspeaker is fitted to the front cavity bracket 301, and a screw is passed through the through hole of the connecting ear 341 and threadedly connected to the screw post 313 to complete the assembly of the front cavity bracket 301 and the rear cavity bracket 304 of the loudspeaker; after the rear cavity bracket 304 of the loudspeaker is assembled on the front cavity bracket 301 of the loudspeaker, the edge of the woofer 302 is clamped between the front cavity bracket 301 and the rear cavity bracket 304 of the loudspeaker. Then, the PCBA main board 303 is assembled on the installation post 342 by screw, and the lead wire on the woofer 302 is welded to the corresponding solder pad on the PCBA main board 303. Finally, the outer shell 211 of the earphone body is connected to the inner shell 212 of the earphone body by screws and glue to complete the assembly of the earcup assembly 2. Embodiment

[0051] Referring to Figure 24 and Figure 25As shown in the figure, on the basis of the first, second, or third embodiment, the front cavity bracket 301 of the horn includes an annular chassis 311, a connecting plate 312, and a horn mounting seat 314. The connecting plates 312 are annularly and spaced apart, one end of which is connected to the annular chassis 311, and the other end is connected to the horn mounting seat 314. The horn mounting seat 314 is coaxial with the annular chassis 311. The sounding unit 3 further includes a mid-high frequency horn 306. The horn mounting seat 314 is axially provided with a horn mouth 315, and the mid-high frequency horn 306 is mounted on the horn mounting seat 314. The bass horn 32 is mounted on the annular chassis 311, and the bass horn 32 is coaxially opposite to the mid-high frequency horn 306. The lead wire of the mid-high frequency horn 306 is electrically connected to the PCBA main board 303 after bypassing the connecting plate 312. As Figure 25 shown, in this embodiment, the sound waves emitted by the mid-high frequency horn 306 are exported from the horn mouth 315, radiate in all directions, and then output through the sound passing hole 2131 of the accommodation frame 213. By adding the mid-high frequency horn 306, the mid-high frequency horn 306 and the bass horn 302 are each responsible for the corresponding frequency bands, so that while ensuring the low-frequency sinking, the mid-high frequency segments can also be smoother, and at the same time meet the user's quality requirements for low-frequency and mid-high frequency sounds, and improve the product competitiveness.

[0052] When assembling the earphone, first stick the mid-high frequency horn 306 on the horn mounting seat 314, and then bond and fix the bass horn 302 on the annular chassis 311 of the front cavity bracket 301 of the horn with glue. Pass the screws through the connecting ear 341 of the rear cavity bracket 304 of the horn and thread them onto the screw posts 313 to complete the connection between the rear cavity bracket 34 of the horn and the front cavity bracket 31. Then bond the front cavity bracket 301 of the horn to the inner shell 212 of the earphone body with glue. Finally, install the PCBA main board 303 on the mounting post 342 of the rear cavity bracket 304 of the horn, weld the lead wires of the bass horn 302 and the mid-high frequency horn 306 to the PCBA main board 303, and finally connect the outer shell 211 and the inner shell 212 of the earphone body, and lock and fix them with screws to complete the assembly of the earphone.

[0053] In this embodiment, the horn mouth 315 of the horn mounting seat 314 is a through hole axially penetrating the horn mounting seat 315, and the axis of the accommodation frame 213 is closed and non-conductive. The sound passing holes 2131 are distributed around the axis to form an annular sound passing hole 2131. And the shape of the accommodation frame 213 is a cone, and the sound passing holes 2131 are distributed on the conical surface of the accommodation frame 213, so that the sound waves transmitted from the sound passing holes 2131 can be evenly diffused around the axis, reducing the direct impact of the axis on the middle part of the eardrum when the sound waves are conducted to the eardrum, making the user's sound listening more gentle.

[0054] When the present invention is in specific use, the earcup connecting member 11 and the headband 1 are adjusted by rotating the hinge portion 12, which is convenient for fitting the user to wear; during the wearing process, the earcup connecting member 11 can also be rotated to adjust the angle of the earcup assembly 2, and further rotate the earcup assembly 2 to adjust the elevation angle of the earcup assembly 2, which is further convenient for the user to wear and improves the wearing comfort. When the earphone is not in use, the folding hinge portion 12 can be rotated to make the hinge portion 12 rotate relative to the end of the headband 1, so that the earcup assembly 2 folds inward toward the headband 1, reducing the occupied space and being convenient for carrying.

[0055] The earcup back cover 202 is covered on the earcup assembly 2, so that a relatively closed sound listening space is formed after the earcup assembly 2 wraps the user's ear; it can isolate sound leakage, achieve a good sound insulation effect, protect the user's voice during the call with this earphone from leaking, protect privacy and is suitable for immersive music listening or professional audio production. When the user feels discomfort after listening for a long time, the earcup back cover 202 can be removed to connect the sound listening space where the earcup assembly 2 covers the ear to the outside world, releasing the internal sound pressure to improve the discomfort caused by long-term wearing. When used outdoors, the surrounding environment sounds can be timely sensed during the sound listening process, improving vigilance.

[0056] During the sound listening process, the sound wave is reflected by the reflection sound cone 305 and output from the sound passing hole 2131 on the surface of the accommodation frame 213, so that the low-frequency sound wave diffuses around the pronunciation unit 3 axis and enters the ear canal, reducing the impact on the eardrum by the axial transmission and making the sound listening softer. The pronunciation unit 3 further includes a mid-high frequency speaker 306. The mid-high frequency speaker 306 and the bass speaker 302 are each responsible for the corresponding frequency band, ensuring that while the low frequency sinks, the mid-high frequency band can also be smoother, and meeting the user's requirements for low-frequency and mid-high frequency sound quality at the same time.

[0057] The first connecting arm 215 is inserted and positioned in the installation groove 309, and the position of the pronunciation unit 3 relative to the first connecting arm 215 can be moved, so as to adjust the distance between the pronunciation unit 3 and the user's eardrum, enabling the user to experience different sound listening feelings. Through the cooperation of the ball plunger 218 and the gear position elastic piece 371, the ball plunger 218 presses against the gear position elastic piece 371 to fix the position of the pronunciation unit 3 relative to the first connecting arm 215, and the positioning groove 372 on the gear position elastic piece 371 corresponding to the ball plunger 218 can also be adjusted to realize the adjustment of the position of the pronunciation unit 3.

[0058] In summary, the present invention has been made into actual samples as described in the specification and illustrations and has been tested through multiple uses. From the results of the use tests, it can be proven that the present invention can achieve its intended purpose, and its practical value is beyond doubt. The above-described embodiments are only used to conveniently illustrate the present invention and do not impose any formal restrictions on the present invention. Any person with ordinary knowledge in the relevant technical field, without departing from the technical features of the present invention, makes equivalent embodiments with partial modifications or decorations using the technical content disclosed by the present invention and without departing from the technical feature content of the present invention, all still fall within the scope of the technical features of the present invention.

Claims

1. A headset with adjustable speaker distance, comprising a headset (1) and earmuff assemblies (2) connected to both ends of the headset (1), characterized in that: The earmuff assembly (2) comprises an earphone body (21a) and a sound unit (3); the earphone body (21a) is connected to the sound unit (3) via a connecting arm (21b); the sound unit (3) is movably connected to the connecting arm (21b); the sound unit (3) is capable of axial movement relative to the earphone body (21a) to adjust the distance between the sound units (3) at both ends of the headband (1).

2. The headphone with adjustable speaker distance according to claim 1, characterized in that: The sounding unit (3) is provided with a mounting groove (309), and the end of the connecting arm (21b) is slidably embedded in the mounting groove (309). The sounding unit (3) can move on the end of the connecting arm (21b) through the mounting groove (309).

3. The headphone with adjustable speaker distance according to claim 2, characterized in that: A clamping flange (2151) is provided on the outer side of the bottom of the connecting arm (21b), and the mounting groove (309) of the sound unit (3) is slidably sleeved on the clamping flange (2151).

4. The headphone with adjustable speaker distance according to claim 2, characterized in that: A ball plunger (218) is provided at the end of the connecting arm (21b), a gear spring (371) is provided on the mounting groove (309), a plurality of positioning grooves (372) are provided at intervals on the surface of the gear spring (371), and the ball plunger (218) abuts against the positioning grooves (372) to adjust the position of the pronunciation unit (3).

5. The headphone with adjustable speaker distance according to claim 4, characterized in that: A metal barb (373) extends inwardly from the back side of the gear spring piece (371).

6. The headphone with adjustable speaker distance according to claim 4, characterized in that: The ball head plunger (218) comprises a plunger body (2181), a spring (2182) and a plunger rod (2183); the plunger body (2181) is provided with a semi-enclosed plunger groove (2184); one end of the plunger rod (21813) extends into the plunger groove (2184) and the outer end forms a hemispherical end (2185); and the two ends of the spring (2182) are respectively in contact with the plunger groove (2184) and the hemispherical end (2185).

7. The headphone with adjustable speaker distance according to claim 6, characterized in that: The notch of the plunger groove (2184) extends radially inwardly to form a radial inner edge (2186), the inner side of the hemispherical end (2185) forms a radial outer edge (2187), and the plunger rod (2183) extends into the plunger groove (2184) and is confined within the radial inner edge (2186) by the radial outer edge (2187).

8. The headphone with adjustable speaker distance according to claim 4, characterized in that: An assembly hole (217) is provided at the end of the connecting arm (21b), and the ball plunger (218) is arranged in the assembly hole (217).

9. The headphone with adjustable speaker distance according to claim 1, characterized in that: The earphone body (21a) is in the shape of a ring, and the sound producing unit (3) is located at the axis of the earphone body (21a).

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