Earphone

Abstract

The invention relates to an earphone which comprises a shell assembly, a bone conduction loudspeaker and an air conduction loudspeaker, the shell assembly comprises a first shell, a second shell and a third shell, the second shell and the first shell are connected and matched with each other to form a first containing cavity, the third shell is connected with the first shell and the second shell, and the bone conduction loudspeaker and the air conduction loudspeaker are arranged in the first containing cavity. The first shell and the second shell are matched to form a second accommodating cavity; the air conduction loudspeaker is arranged in the first accommodating cavity; the bone conduction loudspeaker is arranged in the second accommodating cavity; wherein the third shell is arranged to be in contact with the face of the user in a wearing state, and a joint seam between the third shell and the second shell is not in contact with the face of the user. By means of the mode, the joint seam of the shell assembly is controlled not to make contact with the face of the user, the risk that the joint seam of the shell assembly clamps the face of the user can be reduced, and in addition, the risk that sweat on the face of the user enters the shell assembly through the joint seam can be further reduced.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a headset. Background Art

[0002] With the increasing popularity of electronic devices, electronic devices have become an indispensable social and entertainment tool in people's daily lives, and people's requirements for electronic devices are getting higher and higher. Electronic devices such as headphones and smart glasses have also been widely used in people's daily lives. They can be used in conjunction with terminal devices such as mobile phones and computers to provide users with an auditory feast.

[0003] However, current earphone shells generally use an assembled structure, which may result in a seam in the area where the earphone fits the user's face. In addition, during daily use, the seam of the shell may pinch the user's face, and the sweat on the user's face may enter the earphone through the seam, affecting the electronic components inside the earphone. Summary of the invention

[0004] To this end, the present application provides an earphone that can improve the problem in the prior art that during use of the earphone, the joint seam of the shell may pinch the user's face and sweat may enter the interior of the earphone through the joint seam.

[0005] The present application provides headphones, which include: a shell assembly, a bone conduction speaker and an air conduction speaker, the shell assembly includes a first shell, a second shell and a third shell, wherein the second shell is joined with the first shell and cooperates with each other to form a first accommodating cavity, the third shell is respectively joined with the first shell and the second shell and cooperates with the first shell to form a second accommodating cavity; the air conduction speaker is arranged in the first accommodating cavity; the bone conduction speaker is arranged in the second accommodating cavity; wherein the third shell is arranged to contact with the user's face in a wearing state, and the joint seam between the third shell and the second shell does not contact with the user's face.

[0006] By controlling the joint seam of the shell assembly to prevent it from contacting the user's face in the above manner, the risk of the joint seam of the shell assembly pinching the user's face can be reduced. In addition, the risk of sweat on the user's face entering the shell assembly through the joint seam can be further reduced.

[0007] In some embodiments, the second shell is joined to the first shell, and the third shell is further joined to the joined first shell and second shell.

[0008] In some embodiments, the third shell includes a main body and an extension portion, the main body is used to contact the user's face, the extension portion is integrally formed with the main body on a side of the main body close to the second shell, and the extension portion is joined to the first shell and the second shell.

[0009] In some embodiments, the first shell includes a main shell and a first annular flange, the main shell includes a bottom wall portion and a side wall portion connected to each other, the first annular flange is protruded from the outside of the side wall portion, and is divided into a first sub-connection portion and a second sub-connection portion along the circumference of the first annular flange; the second shell is engaged with the first annular flange, and the second shell is configured so that the outer peripheral surface of the second sub-connection portion remains exposed relative to the second shell, and the third shell is engaged with the side wall portion and the second sub-connection portion, and is configured to cover the outer peripheral surface of the second sub-connection portion and part of the outer side surface of the second shell.

[0010] In some embodiments, at an edge of the second shell close to the second sub-connecting portion, an outer side surface of the second shell is at least partially flush with an outer circumferential surface of the second sub-connecting portion.

[0011] In some embodiments, along the circumference of the first annular flange, a ratio of a length of a portion of the second sub-connecting portion flush with the second housing to a length of the second sub-connecting portion is greater than 50%.

[0012] In some embodiments, along the circumference of the first annular flange, a ratio of the length of the second sub-connecting portion to the length of the first annular flange is greater than 1 / 3.

[0013] In some embodiments, within the coverage area of ​​the third shell over the second sub-connecting portion, the first shell and the third shell are respectively provided with first positioning structures that cooperate with each other.

[0014] In some embodiments, the first positioning structure includes two positioning holes and two positioning columns that cooperate with each other; the two positioning holes are arranged on the outer peripheral surface of the second sub-connecting part and are spaced apart from each other, and the spacing direction of the two positioning holes is arranged crosswise with the joining direction of the first shell and the second shell; the two positioning columns are arranged on the third shell and are respectively inserted into the two positioning holes; a glue containing groove is also provided between the two positioning holes, and the glue containing groove extends along the spacing direction of the two positioning holes.

[0015] In some embodiments, within the covering area of ​​the third shell on the second shell, the second shell and the third shell are respectively provided with second positioning structures that cooperate with each other.

[0016] In some embodiments, the first positioning structure includes two positioning holes and two positioning columns that cooperate with each other, the two positioning holes are arranged on the outer peripheral surface of the second sub-connecting part and are spaced apart from each other, and the spacing direction of the two positioning holes is cross-arranged with the joining direction of the first shell and the second shell; the two positioning columns are arranged on the third shell and are respectively inserted into the two positioning holes; the second positioning structure includes an embedding groove arranged on a part of the outer surface of the second shell and an embedding block embedded in the embedding groove, the length direction of the embedding groove is cross-arranged with the joining direction, and the projection along the joining direction at least partially falls between the two positioning holes.

[0017] In some embodiments, the second shell is provided with a recessed area corresponding to the covering area of ​​the third shell, and the third shell is embedded in the recessed area.

[0018] In some embodiments, the depth of the recessed area is set so that at the joint between the third shell and the second shell, the outer side surface of the third shell and the outer side surface of the second shell are flush with each other.

[0019] In some embodiments, within the recessed area, the outer side surface of the second shell is arranged to be inclined toward the bottom wall portion in a direction away from the second sub-connecting portion.

[0020] In some embodiments, the main shell and the first sub-connecting part cooperate with each other to form a supporting table surface on the periphery of the first sub-connecting part, and the second shell is supported on the supporting table surface and covers the outer peripheral surface of the first sub-connecting part.

[0021] In some embodiments, the first sub-connecting portion is a protrusion, a slot corresponding to the first sub-connecting portion is provided on the second shell, and the first sub-connecting portion is snapped into the slot.

[0022] In some embodiments, the support table and the second shell are respectively provided with third positioning structures that cooperate with each other.

[0023] In some embodiments, an ear hook connection portion is provided on the first shell; in the vibration direction of the air conduction speaker, the bone conduction speaker is closer to the ear hook connection portion than the air conduction speaker.

[0024] In some embodiments, a wiring hole is provided on the support table surface to connect the second accommodating cavity to the periphery of the first sub-connecting portion, and the wiring hole is provided adjacent to the ear hook connecting portion.

[0025] In some embodiments, a wiring notch communicating with the wiring hole is provided on the first sub-connection portion.

[0026] In some embodiments, in a reference plane perpendicular to the vibration direction of the air conduction speaker, the central axis of the ear hook connecting portion has a first projection, the air conduction speaker has a second projection, and the distance from the first projection to the center of the second projection is no more than 5 mm.

[0027] In some embodiments, the second shell is configured to abut against the outer end surface of the second sub-connecting portion, and a plurality of protrusions spaced apart from each other are provided on the outer end surface and / or the abutting surface where the second shell abuts against the outer end surface.

[0028] In some embodiments, a second annular flange is provided on the second shell, and the second annular flange is embedded in the first annular flange.

[0029] In some embodiments, the third shell has a planar contact area that contacts the user's face when in use, and in the normal direction of the planar contact area, the height difference between the planar contact area and the joint seam is greater than 0.5 mm.

[0030] In some embodiments, the bone conduction speaker has an upper end surface and a lower end surface that are relatively arranged in its vibration direction; the central axis of the air conduction speaker is located between the upper end surface and the lower end surface, and the ratio of the distance between the central axis and the upper end surface to the distance between the upper end surface and the lower end surface is 40%-70%.

[0031] In some embodiments, the first shell includes a bottom wall portion, and the bone conduction speaker has a lower end surface adjacent to the bottom wall portion along its vibration direction, and the gap between the bottom wall portion and the lower end surface gradually increases in a direction approaching the first accommodating cavity to form a accommodating space for accommodating electronic components.

[0032] In some embodiments, an ear hook connection portion is provided on the first shell, and in the vibration direction of the air conduction speaker, the bone conduction speaker is closer to the ear hook connection portion than the air conduction speaker; the shell assembly is also provided with a pressure relief hole for connecting the first accommodating cavity with the external environment; on a reference plane perpendicular to the vibration direction of the bone conduction speaker, the bone conduction speaker is a rounded rectangle, and the pressure relief hole and the ear hook connection portion are respectively arranged at the rounded positions on both sides of the diagonal of the bone conduction speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 is a schematic diagram of the overall structure of an earphone embodiment of the present application;

[0035] Figure 2 is a structural schematic diagram of a core assembly of an earphone embodiment of the present application;

[0036] Figure 3 is a schematic diagram of the exploded structure of the core assembly of the earphone embodiment of the present application;

[0037] Figure 4 is a schematic diagram of the front profile of the ear of the user described in the present application;

[0038] Figure 5 is a schematic structural diagram of a first shell of an earphone embodiment of the present application;

[0039] Figure 6 is a schematic structural diagram of a second housing of an earphone embodiment of the present application;

[0040] Figure 7 is a schematic structural diagram of a third housing of an earphone embodiment of the present application;

[0041] Figure 8 is a schematic structural diagram of the connection between the first shell and the second shell of the earphone embodiment of the present application;

[0042] Fig. 9 is a schematic structural diagram of a first shell and a second shell of an earphone embodiment of the present application being joined together;

[0043] Fig.10 is a schematic structural diagram of the third housing and the first and second housings after being joined in the headset embodiment of the present application;

[0044] Fig.11 It is a structural schematic diagram of a microphone assembly of an earphone embodiment of the present application being arranged in a first shell. DETAILED DESCRIPTION

[0045] The present application is further described in detail below in conjunction with the accompanying drawings and examples. It is particularly noted that the following examples are only used to illustrate the present application, but are not intended to limit the scope of the present application. Similarly, the following examples are only some embodiments of the present application rather than all embodiments, and all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of this application.

[0046] Reference to "embodiment" in this application means that a specific feature, structure or characteristic described in conjunction with the embodiment may be included in at least one embodiment of this application. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0047] The inventor of the present application has found that the shell assembly 10 of many current movement assemblies 1 is usually assembled from at least two shells. The position of the joint seam formed during the shell assembly process makes it easy for it to contact the user's face during wearing. In this case, the joint seam may pinch the user's face, reducing the user's wearing experience. In addition, due to the presence of the joint seam, the user's sweat during use may enter the interior of the shell assembly 10 through the joint seam, and further may have a negative impact on the electronic components (such as circuit boards, speakers or microphones, etc.) inside the shell assembly 10.

[0048] In order to solve the above problems, some embodiments of the present application provide an earphone 100a, which includes a core component 1, an ear hook component 2 and a rear hook component 3.

[0049] See also Figure 1 , Figure 2 and Figure 3 , the number of the movement components 1 can be two. The two movement components 1 are used to transmit vibration and / or sound to the left ear and the right ear of the user respectively. The movement component 1 may include a housing component 10, a bone conduction speaker 11 and an air conduction speaker 12. The bone conduction speaker 11 and the air conduction speaker 12 may be arranged in the housing component 10. The air conduction speaker 12 conducts the sound to the ear canal of the user through the principle of air vibration, and the bone conduction speaker 11 conducts the sound to the user through bone conduction vibration. The two movement components 1 may be the same or different. For example, one movement component 1 may be provided with a microphone, while the other movement component 1 may not be provided with a microphone. For another example, one movement component 1 may be provided with a button and a corresponding circuit board, while the other movement component 1 may not be provided with the button and the corresponding circuit board. The two movement components 1 may be the same in the movement module (such as a speaker module). The movement component 1 described later in this article can be considered to be described in detail by taking one of the two movement components 1 as an example.

[0050] The number of ear hook components 2 can be two, and the two ear hook components 2 can be hung on the left ear and the right ear of the user respectively, so that the core component 1 can fit the face of the user. The two ear hook components 2 can include ear hooks 20 hung on the ears of the user. One end of the ear hook component 2 is connected to the core component 1, and the other end of the ear hook component 2 is connected to the back hanging component 3. The two ear hook components 2 can be the same or not completely the same. For example, one of the ear hook components 2 can be provided with a battery, and the other ear hook component 2 can be provided with a circuit board and an antenna component, etc. The circuit board can be electrically connected to at least one of a battery, a bone conduction speaker, an air conduction speaker, a microphone, and an antenna component.

[0051] The back hanging component 3 connects the two ear hanging components 2. The back hanging component 3 is used to wrap around the back of the user's neck or the back of the head, and can provide a clamping force, so that the two core components 1 are clamped on both sides of the user's face and the ear hanging components 2 are more firmly hung on the user's ears. Of course, the earphone 100a may also not include the back hanging component 3, and the core component 1 is worn on the user's ears through the ear hanging components 2.

[0052] Combination Figure 4 , the user's ear 500 may include physiological parts such as the external auditory canal 501, the cavum concha 502, the cymba concha 503, the triangular fossa 504, the antihelix 505, the scaphoid 506, the helix 507, the antitragus 508 and the crus of the helix 509. Among them, although the external auditory canal 501 has a certain depth and extends to the eardrum of the ear, for the convenience of description, and in combination with Figure 4In the present application, unless otherwise specified, the external auditory canal 501 specifically refers to its entrance away from the tympanic membrane (i.e., the ear hole). Furthermore, the concha cavity 502, the hymena conchae 503, the triangular fossa 504 and other physiological parts have a certain volume and depth; and the concha cavity 502 is directly connected to the external auditory canal 501, which can be simply regarded as the aforementioned ear hole being located at the bottom of the concha cavity 502.

[0053] In some embodiments, the earphone 100a can be worn and stabilized by using one or more parts of the ear 500. In some embodiments, the external auditory canal 501, the cavum concha 502, the cymba concha 503, the triangular fossa 504 and other parts have a certain depth and volume in three-dimensional space, which can be used to meet the wearing requirements of the earphone.

[0054] Typically, the movement component 1 is located on the front side of the ear when worn, and the ear hook component 2 is located on the back side of the ear when worn, so that the earphone 100a is hung on the ear when worn. The movement component 1 may have a connection end connected to the ear hook component 2 and a free end not connected to the ear hook component 2. In some embodiments, the movement component 1 may be configured not to block the external auditory canal when worn, so that the earphone 100a acts as an "open earphone". Due to individual differences among different users, when the earphone 100a is worn by different users, the movement component 1 may partially block the external auditory canal, but the external auditory canal is still not blocked.

[0055] In some embodiments, an open-type earphone (for example, earphone 100a) can be worn with the help of the cymba concha 503, the triangular fossa 504, the antihelix 505, the scaphoid 506, the helix 507 and other parts or a combination thereof. In some embodiments, in order to improve the comfort and reliability of the earphone in wearing, it is also possible to further use the earlobe and other parts of the user. By using other parts of the ear 500 other than the external auditory canal 501 to achieve the wearing of the earphone and the transmission of sound, the external auditory canal 501 of the user can be "liberated" and the impact of the earphone on the health of the user's ears can be reduced. When the user wears the earphone on the road, the earphone will not block the external auditory canal 501 of the user, and the user can receive both the sound from the earphone and the sound from the environment (for example, horns, car bells, surrounding human voices, traffic control sounds, etc.), thereby reducing the probability of traffic accidents. For example, when the user wears the earphone, the entire or partial structure of the earphone can be located on the front side of the ear caster 509 (for example, Figure 4 The area enclosed by the dashed line J).

[0056] In addition, different users may have individual differences, resulting in different shapes, sizes and other dimensional differences in the ears. For the convenience of description, and to reduce (or even eliminate) individual differences between different users, a simulator containing a head and its (left and right) ears can be made based on ANSI: S3.36, S3.25 and IEC: 60318-7 standards, such as GRAS45BC40KEMAR. Therefore, in this application, descriptions such as "the user wears headphones", "the headphones are in a wearing state" and "in a wearing state" may refer to the headphones described in this application being worn on the ears of the aforementioned simulator. Of course, precisely because different users have individual differences, there may be certain differences between the headphones worn by different users and the headphones worn on the ears of the aforementioned simulator, but such differences should be tolerated. According to one or more embodiments of the present application, see Figure 2 and Figure 3 The movement assembly 1 may include a housing assembly 10, a bone conduction speaker 11 and an air conduction speaker 12. The air conduction speaker 12 may conduct sound to the user's ear canal through the principle of air vibration, and the bone conduction speaker 11 may conduct sound to the user through bone conduction vibration.

[0057] See also Figure 3 , Figure 5 , Figure 6 and Figure 7 , the shell assembly 10 may include a first shell 101, a second shell 102 and a third shell 103. The second shell 102 can be joined with the first shell 101, and cooperate with each other to form a first accommodating chamber 104. The third shell 103 is respectively joined with the first shell 101 and the second shell 102, and cooperates with the first shell 101 to form a second accommodating chamber 105. The air conduction speaker 12 is disposed in the first accommodating chamber 104. The bone conduction speaker 11 is disposed in the second accommodating chamber 105. Among them, the third shell 103 is configured to contact the user's face in the wearing state, and the joint seam between the third shell 103 and the second shell 102 does not contact the user's face.

[0058] That is to say, the shell assembly 10 (especially the third shell 103) may have a contact area 1033 that fits the user's face when worn. The contact area 1033 may be a planar structure, a curved structure, or a combination of the two. The joint between the third shell 103 and the second shell 102 may be located outside the contact area 1033. In the above manner, the joint of the shell assembly 10 is controlled not to contact the user's face, which can reduce the risk of the joint of the shell assembly 10 clamping the user's face and improve the user's comfort. In addition, the risk of sweat on the user's face entering the interior of the shell assembly 10 through the joint can be further reduced. It should be noted that the contact area 1033 may be the portion that contacts the facial area (J area) adjacent to the external auditory canal 501 of the simulator when the earphones are worn on the aforementioned simulator.

[0059] See also Figure 8 , Fig. 9 and Fig.10 In some embodiments, the second shell 102 is joined to the first shell 101. The third shell 103 is further joined to the joined first shell 101 and the second shell 102. The first shell 101, the second shell 102 and the third shell 103 can be joined by interlocking or bonding. In this case, during the assembly of the shell assembly 10, the first shell 101 and the second shell 102 can be first butted and assembled, and then the third shell 103 can be covered on the first shell 101 and the second shell 102 and assembled with the first shell 101 and the second shell 102, thereby reducing the difficulty of assembling the three shells. Of course, in other embodiments, the first shell 101 and the third shell 103 can also be joined first, and then the second shell 102 can be joined to the joined first shell 101 and the third shell 103. This application does not specifically limit the order of joining the three shells.

[0060] See also Figure 3In some embodiments, the third shell 103 includes a main body 1031 and an extension 1032. The main body 1031 is used to contact the user's face. The extension 1032 is connected to the main body 1031, for example, it can be extended from the side of the main body 1031 close to the second shell 102 toward the side away from the user's face. In this case, the contact area 1033 can be formed on the main body 1031, and the extension 1032 can extend toward the side where the second shell 102 is located. In some embodiments, the extension 1032 is integrally formed with the main body 1031 on the side of the main body 1031 close to the second shell 102. The main body 1031 and the extension 1032 can be made of the same material, for example, the same plastic is integrally formed by injection molding. The first shell 101 and the second shell 102 are joined to each other to form a joint seam, and the extension 1032 can extend to cover the first shell 101 and the second shell 102, and cover the joint seam between the first shell 101 and the second shell 102. The extension part 1032 can be further joined with the first shell 101 and the second shell 102, so that the above-mentioned joint seam of the third shell 103 and the second shell 102 is formed between the extension part 1032 and the second shell 102. By covering the joint seam of the second shell 102 and the first shell with the third shell 103, the number of exposed joint seams can be further reduced, the workload of dispensing can be reduced, and the structure of the movement assembly 1 can be made more compact and more reliable.

[0061] In this way, since the joint seam between the first shell 101 and the second shell 102 can be covered by the extension portion 1032 and will not be exposed, the overall sealing of the shell assembly 10 can be improved, the risk of the joint seam of the shell assembly 10 being clamped on the user's face can be reduced, and the risk of the user's facial sweat entering the shell assembly 10 through the joint seam can be further reduced. In addition, the number of joint seams of the shell assembly 10 that may be exposed and contact the user's face can be reduced, thereby improving the wearing comfort.

[0062] In a structure where the joint seam fits the user's face, the presence of the joint seam may have a negative effect on the bone conduction of sound, but in the present application, the third shell 103 can have a larger surface area, thereby increasing the effective area of ​​bone conduction when the bone conduction speaker 11 is working (that is, the contact area between the third shell 103 and the user's face), thereby improving the effect of bone conduction. In addition, the shell part of the bone conduction speaker 11 facing the user's face (that is, the third shell 103) and the shell part of the bone conduction speaker 11 facing away from the user's face (the part of the first shell 101) are roughly equal in area, which can improve the sound leakage cancellation effect of the bone conduction speaker 11, thereby improving the sound leakage reduction effect.

[0063] See also Figure 4In some embodiments, the first shell 101 includes a main shell 1011 and a first annular flange 1012. The main shell 1011 includes a bottom wall portion 1013 and a side wall portion 1014 connected to each other. The first annular flange 1012 is protrudingly arranged on the outside of the side wall portion 1014. The bottom wall portion 1013 may include a first bottom wall portion 1013 and a second bottom wall portion 1013; wherein the first bottom wall portion 1013 is a portion of the first shell 101 that is spaced apart from the second shell 102 when the first shell 101 and the second shell 102 are assembled together, and the second bottom wall portion 1013 is a portion of the first shell 101 that is spaced apart from the third shell 103 when the first shell 101 and the third shell 103 are assembled together. The side wall portion 1014 may include a first side wall portion 1014 and a second side wall portion 1014; wherein the first side wall portion 1014 is a portion connected to the outer periphery of the first bottom wall portion 1013 and extending toward the second housing 102, and the second side wall portion 1014 is a portion connected to the outer periphery of the second bottom wall portion 1013 and extending toward the third housing 103. In some embodiments, the surface of the side wall portion 1014 facing the second housing 102 may form a support table 1015 for supporting the second housing 102 when the first housing 101 and the second housing 102 are assembled together. The first annular flange 1012 may protrude from the support table 1015.

[0064] See also Figure 8 and Fig. 9 , the second shell 102 may be configured to engage with the first annular flange 1012. In some embodiments, when the second shell 102 and the first shell 101 are engaged, the first annular flange 1012 may be partially embedded in the second shell 102, that is, the second shell 102 may surround a portion of the outer circumference of the first annular flange 1012. Another portion of the first annular flange 1012 may be butted against the second shell 102. For ease of description, the first annular flange 1012 may be divided into a first sub-connection portion 1012a and a second sub-connection portion 1012b along the circumferential direction.

[0065] See also Figure 5 In some embodiments, the main housing 1011 and the first sub-connection portion 1012a cooperate with each other to form the above-mentioned support table 1015 on the periphery of the first sub-connection portion 1012a. The second housing 102 is supported on the support table 1015 and covers the outer peripheral surface of the first sub-connection portion 1012a. In this way, there is a large contact area between the second housing 102 and the first housing 101, which can enhance the reliability and bonding strength of the connection between the first housing 101 and the second housing 102. Among them, the second housing 102 can abut on the support table 1015, or the second housing 102 and the support table 1015 can be further bonded to each other by an adhesive such as glue.

[0066] In some embodiments, the first sub-connecting portion 1012a may be a protruding structure, and the second housing 102 may be provided with a slot corresponding to the first sub-connecting portion 1012a. The first sub-connecting portion 1012a may be snapped into the slot. In this case, the first sub-connecting portion 1012a may be more reliably embedded in the second housing 102. In some embodiments, the first sub-connecting portion 1012a may also be a recessed structure, and the second housing 102 may be provided with a protruding structure adapted to the recessed structure, so that the first sub-connecting portion 1012a and the second housing 102 are reliably connected to each other by interlocking. In some embodiments, the first sub-connecting portion 1012a may also be a combination of a protruding structure and a recessed structure to enhance the connection reliability between the first sub-connecting portion 1012a and the second housing 102.

[0067] The second sub-connection portion 1012b may refer to a portion of the first annular flange 1012 disposed close to the third housing 103. The second housing 102 is disposed so that the outer circumferential surface of the second sub-connection portion 1012b remains exposed relative to the second housing 102. The third housing 103 is engaged with the side wall portion 1014 and the second sub-connection portion 1012b, and is disposed to cover the outer circumferential surface of the second sub-connection portion 1012b and a portion of the outer side surface of the second housing 102. In this case, the third housing 103 and the second housing 102 may be combined to surround the outer circumferential surface of the first annular flange 1012 of the first housing 101, which can reduce the thickness of the housing assembly 10 and the volume of the movement assembly 1 compared to a solution in which the second housing 102 is directly used to surround the first annular flange 1012 and the third housing 103 is disposed outside the second housing 102. Moreover, the joint between the first shell 101 and the second shell 102 can be covered by the third shell 103 and will not be exposed, thereby improving the overall sealing of the shell assembly 10, reducing the risk of the joint of the shell assembly 10 being clamped on the user's face, and further reducing the risk of the user's facial sweat entering the shell assembly 10 through the joint. In addition, the number of joints of the shell assembly 10 that may be exposed and contact the user's face can be reduced, thereby improving the wearing comfort.

[0068] The first shell 101 and the second shell 102 are interlocked with each other through the first sub-connection part 1012a and the support table 1015 and other structures. This interlocking structure can improve the connection strength of the first shell 101 and the second shell 102 during assembly. The second sub-connection part 1012b of the first shell 101 is connected with the second shell 102, and the third shell 103 is covered on the first shell 101 and the second shell 102 through dispensing or positioning structure. This connection method enables the second shell 102 and the second sub-connection part 1012b to achieve "single-sided matching", which can make the wall thickness of the shell assembly 10 roughly uniform and appropriately reduce the volume of the movement assembly 1. Of course, after the first sub-connection part 1012a of the first shell 101 is connected with the second shell 102, the reliability of assembly can also be further improved by dispensing glue between the first sub-connection part 1012a and the second shell 102. Among them, interlocking means that at least three sides of an element are surrounded by another element; while unilateral matching means that one element and another element are connected to each other through one surface, and there is no surrounding relationship.

[0069] In some embodiments, along the circumference of the first annular flange 1012, the ratio of the length of the second sub-connection portion 1012b to the length of the first annular flange 1012 is greater than 1 / 3. The ratio of the length of the second sub-connection portion 1012b to the length of the first annular flange 1012 may be 33% to 35%, 35.01% to 40%, 40.01% to 45%, or 45.01% to 50%, for example, the ratio of the length of the second sub-connection portion 1012b to the length of the first annular flange 1012 may be 34%, 37%, 38%, 41%, 42%, 43%, 46%, or 49%. In this case, the connection seam between the third shell 103 and the first shell 101 can be as far away from the contact area 1033 as possible. In addition, the contact area when the third shell 103 and the first shell 101 are assembled can also be increased, so that the third shell 103 and the first shell 101 can be firmly assembled together.

[0070] In some embodiments, at the edge of the second shell 102 near the second sub-connection part 1012b, the outer side surface of the second shell 102 is at least partially flush with the outer peripheral surface of the second sub-connection part 1012b. The outer side surface of the second shell 102 is at least partially aligned with the outer peripheral surface of the second sub-connection part 1012b, which can reduce the risk of a gap between the third shell 103 and the outer side surface of the second shell 102 or the outer peripheral surface of the second sub-connection part 1012b, thereby facilitating bone conduction transmission and facilitating the convenient and reliable assembly of the third shell 103. In this case, when the third shell 103 is assembled, the gap between the outer side surface of the third shell 103 and the outer peripheral surface of the second sub-connection part 1012b will be relatively smaller, the more compact the structure of the movement assembly 1, the greater the rigidity of the shell assembly 10 after the glue is filled, and the better the sound leakage reduction effect of the shell assembly 10.

[0071] In some embodiments, along the circumference of the first annular flange 1012, the ratio of the length of the portion of the second sub-connection portion 1012b flush with the second housing 102 to the length of the second sub-connection portion 1012b is greater than 50%. For example, the ratio of the length of the portion of the second sub-connection portion 1012b flush with the second housing 102 to the length of the second sub-connection portion 1012b may be 50%, 55%, 60%, 70%, 80%, etc. In this case, when the third housing 103 is assembled, the gap between the outer side surface of the third housing 103 and the second housing 102 or the outer peripheral surface of the second sub-connection portion 1012b is small, which can greatly improve the sound leakage reduction effect of the housing assembly 10.

[0072] See also Figure 8 and Fig. 9 In some embodiments, the second shell 102 is provided with a recessed area 1021 corresponding to the covering area of ​​the third shell 103, and the third shell 103 is embedded in the recessed area 1021 to prevent the third shell 103 from protruding from the outer side of the second shell 102 when the third shell 103 and the second shell 102 are joined, thereby making the structure of the movement assembly 1 more compact.

[0073] In some embodiments, the depth of the recessed area 1021 is set so that at the joint between the third shell 103 and the second shell 102, the outer side surface of the third shell 103 and the outer side surface of the second shell 102 are flush with each other. That is, when the third shell 103 is assembled to the second shell 102, the outer side surface of the second shell 102 and the outer side surface of the third shell 103 can be smoothly transitioned at the connection, thereby improving the appearance of the movement assembly 1; moreover, the structure of the movement assembly 1 is more compact.

[0074] In some embodiments, in the recessed area 1021, the outer side surface of the second housing 102 is arranged to be inclined in a direction away from the second sub-connection portion 1012b toward the bottom wall portion 1013. Thus, the joint seam between the second housing 102 and the third housing 103 can be formed in an area as far away from the contact area 1033 as possible, thereby reducing the possibility of the joint seam contacting the user's face.

[0075] In some embodiments, in the coverage area of ​​the third shell 103 on the second sub-connection portion 1012b, the first shell 101 and the third shell 103 are respectively provided with first positioning structures 1080 that cooperate with each other, thereby further improving the stability of the first shell 101 and the third shell 103 when they are joined.

[0076] See also Figure 4 and Fig.10 In some embodiments, the first positioning structure 1080 includes two positioning holes 1081 and two positioning posts 1082 that cooperate with each other. The two positioning holes 1081 are arranged on the outer peripheral surface of the second sub-connecting portion 1012b and are spaced apart from each other, and the spacing direction of the two positioning holes 1081 is arranged crosswise with the joining direction of the first shell 101 and the second shell 102. The two positioning posts 1082 are arranged on the third shell 103 and are respectively inserted into the two positioning holes 1081. In this case, the assembly accuracy of the first shell 101 and the third shell 103 can be improved, and the possibility of misalignment between the first shell 101 and the third shell 103 during the assembly process or daily use can be reduced. In some embodiments, the two positioning holes 1081 are spaced apart along the extension direction of the second sub-connecting portion 1012b, that is, the spacing direction of the two positioning holes 1081 is the extension direction of the second sub-connecting portion 1012b.

[0077] See also Figure 4 In some embodiments, a glue groove 1016 is further provided between the two positioning holes 1081, and the glue groove 1016 extends along the spacing direction of the two positioning holes 1081. When the first shell 101 and the third shell 103 are bonded together by glue, the glue groove 1016 can further increase the bonding area of ​​the glue, thereby improving the reliability of the assembly of the first shell 101 and the third shell 103. In some embodiments, the glue groove 1016 can be in a strip shape, which is more convenient for molding.

[0078] The above is an embodiment in which two positioning posts 1082 are arranged on the third shell 103, and two positioning holes 1081 are arranged on the second sub-connection part 1012b. However, in some embodiments, the positions of the two positioning posts 1082 and the two positioning holes 1081 can also be swapped, for example, the two positioning posts 1082 can also be arranged on the outer circumference of the second sub-connection part 1012b, and the two positioning holes 1081 can be arranged on the third shell 103, and the adhesive groove 1016 can be adaptively arranged between the two positioning posts 1082 or between the two positioning holes 1081. Alternatively, a positioning post 1082 and a positioning hole 1081 can be arranged on the outer circumference of the second sub-connection part 1012b, and a positioning hole 1081 and a positioning post 1082 adapted thereto can be arranged on the third shell 103, and the adhesive groove 1016 can be adaptively arranged between the positioning post 1082 and the positioning hole 1081 of the second sub-connection part 1012b. This application does not make specific restrictions on it.

[0079] See also Figure 7 , Figure 8 and Fig. 9 In some embodiments, in the coverage area of ​​the third housing 103 on the second housing 102, the second housing 102 and the third housing 103 are respectively provided with second positioning structures 1085 that cooperate with each other. In this case, the assembly accuracy of the second housing 102 and the third housing 103 can be improved, and the possibility of misalignment between the second housing 102 and the third housing 103 during assembly or daily use can be reduced.

[0080] In some embodiments, the second positioning structure 1085 includes a groove 1086 provided on a portion of the outer surface of the second shell 102 and an insert 1087 provided on the third shell 103. The insert 1087 can be embedded in the groove 1086. The length direction of the groove 1086 (i.e., the extension direction of the groove 1086) is arranged to cross the joining direction of the first shell 101 and the second shell 102, and the projection of the groove 1086 along the joining direction of the first shell 101 and the second shell 102 at least partially falls into or is located between the two positioning holes 1081. In some embodiments, the groove 1086 and the insert 1087 are both strip-shaped, such as a long strip, or a rectangular strip. In this case, the assembly accuracy of the second shell 102 and the third shell 103 can be improved, and the possibility of misalignment between the second shell 102 and the third shell 103 during assembly or daily use can be reduced.

[0081] In some embodiments, the first positioning structure 1080 on the second sub-connecting portion 1012 b and the second positioning structure 1085 on the second shell 102 are respectively located on opposite sides of the joint between the first shell 101 and the second shell 102 .

[0082] See also Figure 4 and Figure 8 In some embodiments, the support table 1015 and the second shell 102 are respectively provided with a third positioning structure 1090 that cooperates with each other. As a result, the stability of the first shell 101 and the second shell 102 when they are joined can be further improved. In some embodiments, the third positioning structure 1090 includes a positioning groove 1091 provided on the support table 1015 and a positioning protrusion 1092 provided on the second shell 102, or a positioning groove 1091 provided on the second shell 102 and a positioning protrusion 1092 provided on the support table 1015. The positioning protrusion 1092 can be embedded in the positioning groove 1091 when the first shell 101 and the second shell 102 are joined. In other embodiments, the third positioning structure 1090 can also be implemented by other matching structures such as a snap-fit ​​structure or a threaded structure. The present application does not limit the specific implementation method of the third positioning structure 1090.

[0083] In some embodiments, the first positioning structure 1080, the second positioning structure 1085, and the third positioning structure 1090 can be combined in any way. That is, in the matching relationship between the first shell 101, the second shell 102, and the third shell 103, the first positioning structure 1080 and / or the second positioning structure 1085 and / or the third positioning structure 1090 can be included. The present application does not specifically limit the combination of the three positioning structures.

[0084] In some embodiments, the first housing 101 is provided with an ear hook connection portion 106 (see Figure 1-10 ). In the vibration direction of the air conduction speaker 12, the bone conduction speaker 11 is closer to the ear hook connection portion 106 than the air conduction speaker 12. In this case, the shaking of the movement assembly 1 can be reduced, so that the bone conduction speaker 11 has a better wearing effect in scenes such as sports, thereby improving the sound quality. In some embodiments, in the projection direction parallel to the extension direction of the ear hook connection portion 106, the projection of the ear hook assembly 2 falls into the second accommodating cavity 105.

[0085] In some embodiments, the bone conduction speaker 11 needs to be electrically connected to the control circuit and the power supply through a wire. By placing the bone conduction speaker 11 closer to the ear hook connection portion 106 than the air conduction speaker 12, the wire between the bone conduction speaker 11 and the control circuit and the power supply can be shortened, thereby reducing the increase in resistance and the shaking of the movement assembly 1 caused by the excessive length of the wire, and reducing the electrical connection problems caused by wire breakage or poor contact, thereby improving the reliability of the electrical connection.

[0086] In some embodiments, the air conduction speaker 12 also needs to be electrically connected to the control circuit and the power supply through a wire. The wire can be further passed through the first shell 101 and the second shell 102 to further enable the air conduction speaker 12 to be powered.

[0087] See also Figure 5 In some embodiments, a wiring hole 1017 is provided on the support table 1015 of the first shell 101, which connects the second accommodating chamber 105 to the periphery of the first sub-connecting portion 1012a. In this case, the wire in the second accommodating chamber 105 can pass through the wiring hole 1017, and then can enter the first accommodating chamber 104 and be connected to the air conduction speaker 12. In some embodiments, the wiring hole 1017 can be arranged adjacent to the ear hook connecting portion 106. In this way, the wiring path length of the wire can be further shortened, making the structure of the movement assembly 1 more compact. In some embodiments, the cross-section of the wiring hole 1017 is rectangular. Of course, in other embodiments, the wiring hole 1017 can also adopt other cross-sectional shapes, which is not specifically limited in this application.

[0088] In some embodiments, the first sub-connection portion 1012a is provided with a wiring notch 1018 communicating with the wiring hole 1017. The wiring notch 1018 can provide an escape space for the wire, facilitating the wire to be led out to the first accommodating cavity 104 for electrical connection with the air conduction speaker 12.

[0089] In some embodiments, in a reference plane perpendicular to the vibration direction of the air conduction speaker 12, the central axis of the ear hook connection portion 106 has a first projection, the air conduction speaker 12 has a second projection, and the distance from the first projection to the center of the second projection is not greater than 5 mm, thereby making the structure of the core assembly 1 more compact. For example, the distance from the first projection to the center of the second projection can be 5 mm, 4 mm, 3 mm, 2 mm, 1 mm, or 0 mm. Among them, when the distance from the first projection to the center of the second projection is 0 mm, that is, the center of the second projection passes through the first projection, at this time, the first accommodating cavity 104 and the vibration transmission plate of the bone conduction speaker 11 (the vibration transmission plate of the bone conduction speaker 11 is substantially perpendicular to the vibration direction of the bone conduction speaker 11) are distributed in a T-shape as a whole, so that the overall volume of the core assembly 1 can be minimized and the structure can be the most compact. It should be noted that the ear hook connection portion 106 has an opening, which is used to connect the ear hook assembly 2, and the central axis of the ear hook connection portion 106 can pass through the center of the opening and be perpendicular to the plane where the opening is located.

[0090] In some embodiments, the shell assembly 10 is also provided with a pressure relief hole for connecting the first accommodating chamber 104 with the external environment. On a reference plane perpendicular to the vibration direction of the bone conduction speaker 11, the bone conduction speaker 11 is a rounded rectangle. A rounded rectangle may refer to a figure formed by rounding the right angles of a rectangle. In some embodiments, the pressure relief hole and the ear hook connection portion 106 are respectively arranged at the rounded positions on both sides of the diagonal of the bone conduction speaker 11. In some embodiments, the center of the pressure relief hole and the center line of the wiring hole 1017 are respectively arranged on the diagonal of the bone conduction speaker 11. In this case, the space at the rounded corner of the shell assembly 10 can be fully utilized to make the above-mentioned pressure relief hole and wiring hole 1017, which is conducive to making the structure of the movement assembly 1 more compact.

[0091] See also Figure 6 and Figure 7 In some embodiments, the second shell 102 is configured to abut against the outer end surface of the second sub-connection portion 1012b, and the outer end surface of the second sub-connection portion 1012b and / or the abutment surface where the second shell 102 abuts against the outer end surface are provided with a plurality of projections 1023 spaced apart from each other. In this case, when the second shell 102 is bonded to the outer end surface of the second sub-connection portion 1012b, the projections 1023 can increase the bonding area, thereby improving the bonding strength between the second shell 102 and the second sub-connection portion 1012b.

[0092] In some embodiments, the second housing 102 is provided with a second annular flange 1024, and the second annular flange 1024 is embedded in the first annular flange 1012. In other words, the first annular flange 1012 can be arranged around the outer periphery of the second annular flange 1024. In addition, the second annular flange 1024 can be continuous or intermittent. In this case, by embedding the first annular flange 1012 and the second annular flange 1024, the reliability of the two when they are joined can be further increased.

[0093] See also Figure 3 In some embodiments, the third shell 103 has a plane contact area 1033a that contacts the user's face when in use, and in the normal direction of the plane contact area 1033a, the height difference between the plane contact area 1033a and the joint seam is greater than 0.5mm. The plane contact area 1033a can be a planar portion of the above-mentioned contact area 1033. In this case, the area of ​​the extension portion 1032 can be appropriately increased, but it will not cause the area of ​​the extension portion 1032 to be too large, which is conducive to reliably and firmly assembling the third shell 103 on the first shell 101 and the second shell 102, and reducing the possibility of the third shell 103 falling off during use.

[0094] In some embodiments, the bone conduction speaker 11 has an upper end surface 11a and a lower end surface 11b arranged opposite to each other in its vibration direction. The central axis of the air conduction speaker 12 is located between the upper end surface 11a and the lower end surface 11b. The central axis of the air conduction speaker 12 can be parallel to its vibration direction. When this structure is adopted, the structure of the movement assembly 1 can be made more compact.

[0095] In some embodiments, the ratio of the distance between the central axis of the air conduction speaker 12 and the upper end surface 11a of the bone conduction speaker 11 to the distance between the upper end surface 11a and the lower end surface 11b of the bone conduction speaker 11 is 40%-70%. That is, the air conduction speaker 12 can be arranged close to the center of the bone conduction speaker 11, which can further reduce the volume of the movement assembly 1 and make the movement assembly 1 more compact compared to the arrangement of the air conduction speaker 12 close to the upper end surface 11a or the lower end surface 11b of the bone conduction speaker 11. In some embodiments, the ratio of the distance between the central axis of the air conduction speaker 12 and the upper end surface 11a of the bone conduction speaker 11 to the distance between the upper end surface 11a and the lower end surface 11b of the bone conduction speaker 11 is 40%, 45%, 50%, 55%, 60%, 65%, 70%, etc. When the ratio of the distance between the central axis of the air conduction speaker 12 and the upper end surface 11a of the bone conduction speaker 11 to the distance between the upper end surface 11a and the lower end surface 11b of the bone conduction speaker 11 is 50%, the first accommodating cavity 104 and the vibration transmission plate of the bone conduction speaker 11 (the vibration transmission plate of the bone conduction speaker 11 is substantially perpendicular to the vibration direction of the bone conduction speaker 11) are distributed in a T shape as a whole, so that the overall volume of the movement assembly 1 can be minimized and the structure can be most compact.

[0096] In some embodiments, the vibration direction of the bone conduction speaker 11 is perpendicular to the central axis of the air conduction speaker 12. In this case, the possibility of interference between the bone conduction speaker 11 and the air conduction speaker 12 during operation can be reduced.

[0097] As described above, the air conduction speaker 12 and the bone conduction speaker 11 are cross-arranged. Generally, the distance between the upper end surface 11a and the lower end surface 11b of the bone conduction speaker 11 may be greater than the radial dimension of the air conduction speaker 12 perpendicular to the central axis. Therefore, it is necessary to improve the structural shape of the shell assembly 10 to improve the space utilization inside the shell assembly 10.

[0098] In some embodiments, the bone conduction speaker 11 has a lower end surface adjacent to the second bottom wall portion 1013 along its vibration direction. The gap between the second bottom wall portion 1013 and the lower end surface gradually increases in a direction close to the first accommodating cavity 104 to form an accommodating space for accommodating electronic components. In this case, the space utilization rate inside the housing assembly 10 can be improved, making the structure of the movement assembly 1 more compact.

[0099] In summary, the earphone 100a provided in some embodiments of the present application may include a housing assembly 10, a bone conduction speaker 11 and an air conduction speaker 12. The housing assembly 10 may include a first housing 101, a second housing 102 and a third housing 103. The second housing 102 may be joined with the first housing 101, and cooperate with each other to form a first accommodating chamber 104. The third housing 103 is respectively joined with the first housing 101 and the second housing 102, and cooperates with the first housing 101 to form a second accommodating chamber 105. The air conduction speaker 12 is disposed in the first accommodating chamber 104. The bone conduction speaker 11 is disposed in the second accommodating chamber 105. The third housing 103 is configured to contact the user's face in a wearing state, and the joint seam between the third housing 103 and the second housing 102 does not contact the user's face.

[0100] By controlling the joint seam of the shell component 10 so as not to contact the user's face in the above manner, the risk of the joint seam of the shell component 10 pinching the user's face can be reduced. In addition, the risk of sweat on the user's face entering the shell component 10 through the joint seam can be further reduced.

[0101] In addition, as described above, the core assembly 1 may include a housing assembly 10 and a microphone assembly 13. The housing assembly 13 may have a second accommodating cavity 105. The microphone assembly 13 may be disposed in the second accommodating cavity 105.

[0102] See also Fig.11 In some embodiments, the housing assembly 10 is provided with one or two sound inlet holes (not shown). Fig.11 As shown, the microphone assembly 13 can be used to collect external sound input through the sound inlet. The sound inlet ends of the two sound inlet holes can be spaced apart from each other, and the sound outlet ends of the two sound inlet holes can be connected to each other. The sound inlet end of the sound inlet hole can refer to the end where the external sound enters the sound inlet hole. The sound outlet end of the sound inlet hole can refer to the end where the external sound flows out after passing through the sound inlet hole.

[0103] Among them, the microphone assembly 13 may include a support base 131 and a microphone 132. A sound guide channel 1311 may be provided on the support base 131. The sound input end of the sound guide channel 1311 is connected to the sound output end of the two sound input holes. The microphone 132 may be provided at the sound output end of the sound guide channel 1311. The sound input end of the sound guide channel 1311 may refer to an end where the external sound enters the sound guide channel after passing through the sound input hole. The sound output end of the sound guide channel 1311 may refer to an end where the external sound flows out through the sound input hole and the sound guide channel 1311.

[0104] In this case, the sound can enter the microphone assembly 13 in the second accommodating cavity 105 through the two sound inlet holes to improve the sound pickup effect of the microphone assembly 13. In addition, when there is a large airflow following the sound into the sound inlet hole during sound pickup, the airflow can enter the housing assembly 10 through one of the sound inlet holes and flow out through the other sound inlet hole, thereby reducing the wind noise during sound pickup.

[0105] In some embodiments, the sound guiding channel 1311 is arranged in a bent shape. In this case, the length of the sound guiding channel 1311 can be increased, the speed of the airflow can be slowed down, and the influence of wind noise can be reduced.

[0106] In some embodiments, the housing assembly 10 is provided with a supporting surface 1071 and abutting surface 1072. The bottom surface of the supporting seat 131 can be supported on the supporting surface 1071, and the side surface can be abutted on the abutting surface 1072.

[0107] In some embodiments, the connection between the abutting surface 1072 and the side surface may be provided with a first sealant 1303, a second sealant 1304, and a third sealant 1305. The first sealant 1303 may seal the gap between the side surface of the support seat 131 and the abutting surface. The second sealant 1304 may at least seal the gap between the top surface of the support seat 131 and the abutting surface 1072. The third sealant 1305 may seal the gap between the ground of the support seat 131 and the support surface 1071. Thus, the possibility of water vapor entering the interior of the housing assembly 10 from the gap between the support seat 131 and the support surface 1071 and the bottom surface 1312 of the abutting surface 1072 can be reduced.

[0108] That is to say, the first sealant 1303, the second sealant 1304, and the third sealant 1305 can isolate the interior of the shell assembly 20 from the sound inlet hole / sound guiding channel 1311 to reduce the possibility that water vapor in the sound inlet hole / sound guiding channel 1311 enters the interior of the shell assembly 20 and causes the electronic components inside the shell assembly 20 (such as the microphone 132) to get damp.

[0109] The above descriptions are only some embodiments of the present application, and do not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A headset, characterized in that: include: A housing assembly, comprising a first housing, a second housing and a third housing, wherein the second housing is engaged with the first housing and cooperates with each other to form a first accommodating cavity, and the third housing is engaged with the first housing and the second housing respectively and cooperates with the first housing to form a second accommodating cavity; an air conduction speaker, disposed in the first accommodating cavity; and A bone conduction speaker, disposed in the second accommodating cavity; The third shell is configured to contact the user's face when worn, and the joint between the third shell and the second shell does not contact the user's face.

2. The earphone according to claim 1, characterized in that The second shell is joined to the first shell, and the third shell is further joined to the joined first shell and second shell.

3. The earphone according to claim 1 or 2, characterized in that: The third shell includes a main body and an extension part, the main body is used to contact the user's face, the extension part is integrally formed with the main body on a side of the main body close to the second shell, and the extension part is engaged with the first shell and the second shell.

4. The earphone according to claim 1 or 2, characterized in that: The first shell includes a main shell and a first annular flange, the main shell includes a bottom wall portion and a side wall portion connected to each other, the first annular flange is protrudingly arranged on the outside of the side wall portion, and is divided into a first sub-connection portion and a second sub-connection portion along the circumference of the first annular flange; The second shell is engaged with the first annular flange, and the second shell is configured so that the outer peripheral surface of the second sub-connection part remains exposed relative to the second shell. The third shell is engaged with the side wall part and the second sub-connection part, and is configured to cover the outer peripheral surface of the second sub-connection part and a portion of the outer side surface of the second shell.

5. The earphone according to claim 4, characterized in that: At an edge of the second shell body close to the second sub-connecting portion, an outer side surface of the second shell body is at least partially flush with an outer peripheral surface of the second sub-connecting portion.

6. The earphone according to claim 5, characterized in that Along the circumference of the first annular flange, a ratio of a length of a portion of the second sub-connection portion flush with the second shell to a length of the second sub-connection portion is greater than 50%.

7. The earphone according to claim 4, characterized in that Along the circumference of the first annular flange, a ratio of the length of the second sub-connection portion to the length of the first annular flange is greater than 1 / 3.

8. The earphone according to claim 4, characterized in that In a covering area of ​​the second sub-connecting portion by the third shell, the first shell and the third shell are respectively provided with first positioning structures that cooperate with each other.

9. The earphone according to claim 8, characterized in that The first positioning structure includes two positioning holes and two positioning columns that cooperate with each other; The two positioning holes are arranged on the outer circumference of the second sub-connecting portion and are spaced apart from each other, and the spacing direction of the two positioning holes is arranged to intersect with the joining direction of the first shell and the second shell; The two positioning posts are arranged on the third housing and are respectively inserted into the two positioning holes; A glue containing groove is also provided between the two positioning holes, and the glue containing groove extends along the spacing direction of the two positioning holes.

10. The earphone according to claim 8, characterized in that In the covering area of ​​the second shell by the third shell, the second shell and the third shell are respectively provided with second positioning structures matching with each other.

11. The earphone according to claim 10, characterized in that The first positioning structure includes two positioning holes and two positioning posts that cooperate with each other. The two positioning holes are arranged on the outer circumference of the second sub-connecting portion and are spaced apart from each other. The spacing direction of the two positioning holes is arranged to intersect with the joining direction of the first shell and the second shell. The two positioning posts are arranged on the third shell and are respectively inserted into the two positioning holes. The second positioning structure includes an embedding groove provided on the partial outer surface of the second shell and an embedding block embedded in the embedding groove. The length direction of the embedding groove is arranged to intersect with the joining direction, and the projection along the joining direction at least partially falls between the two positioning holes.

12. The earphone according to claim 4, characterized in that The second shell is provided with a recessed area corresponding to the covering area of ​​the third shell, and the third shell is embedded in the recessed area.

13. The earphone according to claim 12, characterized in that The depth of the recessed area is set so that at a joint between the third shell and the second shell, an outer side surface of the third shell and an outer side surface of the second shell are flush with each other.

14. The earphone according to claim 12, characterized in that In the recessed area, the outer side surface of the second shell is arranged to be inclined toward the bottom wall portion in a direction away from the second sub-connecting portion.

15. The earphone according to claim 4, characterized in that The main shell and the first sub-connecting part cooperate with each other to form a supporting table surface on the periphery of the first sub-connecting part. The second shell is supported on the supporting table surface and covers the outer peripheral surface of the first sub-connecting part.

16. The earphone according to claim 15, characterized in that The first sub-connecting portion is a protrusion, the second shell is provided with a slot corresponding to the first sub-connecting portion, and the first sub-connecting portion is snapped into the slot.

17. The earphone according to claim 15, characterized in that The supporting table and the second shell are respectively provided with third positioning structures that cooperate with each other.

18. The earphone according to claim 15, characterized in that The first shell is provided with an ear hook connection portion; In the vibration direction of the air conduction speaker, the bone conduction speaker is closer to the ear hook connecting part than the air conduction speaker.

19. The earphone according to claim 18, characterized in that The support table is provided with a wiring hole connecting the second accommodating cavity to the periphery of the first sub-connecting portion, and the wiring hole is arranged adjacent to the ear hook connecting portion.

20. The headset according to claim 19, characterized in that The first sub-connecting portion is provided with a wiring notch which is communicated with the wiring hole.

21. The earphone according to claim 18, characterized in that In a reference plane perpendicular to the vibration direction of the air conduction speaker, the central axis of the ear hook connecting portion has a first projection, the air conduction speaker has a second projection, and the distance from the first projection to the center of the second projection is not greater than 5 mm.

22. The earphone according to claim 4, characterized in that The second shell is arranged to abut against the outer end surface of the second sub-connecting portion, and a plurality of protrusions spaced apart from each other are arranged on the outer end surface and / or on the abutting surface where the second shell abuts against the outer end surface.

23. The earphone according to claim 4, characterized in that The second shell is provided with a second annular flange, and the second annular flange is embedded in the first annular flange.

24. The headset according to claim 1, characterized in that The third shell has a planar contact area that contacts the user's face when in use, and in the normal direction of the planar contact area, the height difference between the planar contact area and the joint seam is greater than 0.5 mm.

25. The earphone according to claim 4, characterized in that The bone conduction speaker has an upper end surface and a lower end surface which are arranged opposite to each other in the vibration direction; The central axis of the air conduction speaker is located between the upper end surface and the lower end surface, and the ratio of the distance between the central axis and the upper end surface to the distance between the upper end surface and the lower end surface is 40%-70%.

26. The headset according to claim 1, characterized in that The first shell includes a bottom wall portion, and the bone conduction speaker has a lower end surface adjacent to the bottom wall portion along its vibration direction. The gap between the bottom wall portion and the lower end surface gradually increases in a direction approaching the first accommodating cavity to form an accommodating space for accommodating electronic components.

27. The headset according to claim 1, characterized in that An ear hook connection portion is provided on the first shell, and in the vibration direction of the air conduction speaker, the bone conduction speaker is closer to the ear hook connection portion than the air conduction speaker; The housing assembly is also provided with a pressure relief hole for connecting the first accommodating chamber with the external environment; On a reference plane perpendicular to the vibration direction of the bone conduction speaker, the bone conduction speaker is in a rounded rectangular shape, and the pressure relief hole and the ear hook connection portion are respectively arranged at rounded positions on both sides of the diagonal line of the bone conduction speaker.

Images