Earphone

Abstract

The utility model relates to an earphone, in particular to the technical field of electronic equipment. A first sound outlet hole and a second sound outlet hole are formed in the machine core shell, the first loudspeaker is arranged to output sound through the first sound outlet hole, the second loudspeaker is arranged to output sound through the second sound outlet hole, the machine core shell is provided with a connecting end and a free end far away from the connecting end, the first sound outlet hole is arranged in a surrounding mode in the circumferential direction of the second sound outlet hole, and the second sound outlet hole is arranged in the free end. The second sound outlet hole is close to one side of the free end. According to the invention, the output of the first loudspeaker and the second loudspeaker is realized through the first sound outlet hole and the second sound outlet hole, and the sound quality of the earphone is improved by further adjusting the positions of the first sound outlet hole and the second sound outlet hole.

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 development of acoustic technology, headphones have been widely used in people's daily life. Headphones may use multiple speakers to output sound in order to provide users with an auditory feast. When using headphones, different speakers may be responsible for outputting sounds in different frequency bands, which will affect the listening quality and user experience. Utility Model Content

[0003] The present application provides an earphone, the earphone comprises a core housing, an ear hook, and a first speaker and a second speaker carried by the core housing, the frequency band of the sound output by the first speaker is at least partially lower than the frequency band of the sound output by the second speaker, the core housing is provided with a first sound outlet hole and a second sound outlet hole, wherein the first speaker is configured to output the sound through the first sound outlet hole, and the second speaker is configured to output the sound through the second sound outlet hole, the core housing has a connection end connected to the ear hook and a free end away from the connection end,

[0004] The first sound outlet hole is arranged around the circumference of the second sound outlet hole, and is partially located on a side of the second sound outlet hole close to the free end.

[0005] The present application implements the output of the first speaker and the second speaker through the first sound outlet hole and the second sound outlet hole, and further adjusts the positions of the first sound outlet hole and the second sound outlet hole to improve the sound quality of the earphone. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] 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.

[0007] Figure 1 is a schematic diagram of the structure of headphones in some embodiments of the present application;

[0008] Figure 2 yes Figure 1 A schematic diagram of the structure of the middle earphone from another perspective;

[0009] Figure 3 yes Figure 1 Schematic diagram of the structure of the middle earphone from another perspective;

[0010] Figure 4is a schematic diagram of the front profile of an ear of a user or a simulator in some embodiments;

[0011] Figure 5 yes Figure 1 A schematic diagram of the middle earphone in some embodiments when it is in a wearing state;

[0012] Figure 6 yes Figure 1 A cross-sectional view of the middle earphone along line VI-VI in some embodiments;

[0013] Figure 7 yes Figure 1 A cross-sectional view of the middle earphone along line VII-VII in some embodiments;

[0014] Figure 8 yes Figure 6 A schematic diagram of the structure of the first housing in some embodiments;

[0015] Fig. 9 yes Figure 8 A schematic structural diagram of the first shell in another viewing angle;

[0016] Fig.10 yes Fig. 9 Schematic diagram of the arrangement of the first sound outlet hole and the second sound outlet hole in other embodiments;

[0017] Fig.11 yes Fig.10 Schematic diagram of the arrangement of the first sound outlet hole and the second sound outlet hole in other embodiments;

[0018] Fig.12 yes Figure 1 A cross-sectional view of the middle earphone along line VII-VII in some other embodiments;

[0019] Fig.13 for Figure 6 A schematic diagram of the structure of the speaker assembly;

[0020] Fig.14 A circuit diagram of a speaker assembly in some embodiments of the present application;

[0021] Fig.15 Schematic diagram of the relationship between the volume of the first front cavity and the resonance frequency of the first front cavity in one embodiment of the present application;

[0022] Fig.16 for Figure 7 A schematic diagram of the structure of the speaker assembly in other embodiments;

[0023] Fig.17 This is a schematic diagram of the cooperation between the second magnet, the third magnet and the first speaker in some embodiments of the present application;

[0024] Fig.18 for Fig.17 Schematic diagram of the effect of the ratio of the cross-sectional area of ​​the second magnet perpendicular to the vibration direction of the second diaphragm to the cross-sectional area of ​​the third magnet perpendicular to the vibration direction of the second diaphragm on the magnetic induction intensity at the first coil;

[0025] Fig.19 for Fig.17 A schematic diagram of the structure of the second speaker in some other embodiments;

[0026] Fig. 20 for Fig.13 A schematic diagram of the structure of the second speaker when it moves in the long axis direction CZ;

[0027] Fig.21 for Fig. 20 Schematic diagram of the influence of the magnetic induction intensity at the first coil when the second speaker moves in the long axis direction CZ. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] This application describes a headset. Figure 1 , Figure 2 and Figure 3 , Figure 1 is a schematic diagram of the structure of headphones in some embodiments of the present application, Figure 2 yes Figure 1 Schematic diagram of the structure of the middle earphone from another perspective. Figure 3 yes Figure 1 The headphone 100 may include a core module 10 and an ear hook 20 connected to the core module 10. The core module 10 may provide sound and realize an auditory experience. Of course, it may also realize a different experience by having other functions such as a sound pickup function, a touch function, a pressing function, and a lighting function. The core module 10 may cooperate with the ear hook 20 to realize wearing.

[0031] See also Figure 4 , Figure 42 is a schematic diagram of the front profile of the ear of the user or simulator in some embodiments. The ear 200 may include physiological parts such as the external auditory canal 2001, the concha cavity 2002, the cymba concha 2003, the triangular fossa 2004, the antihelix 2005, the scaphoid 2006, the helix 2007 and the antitragus 2008. Among them, the external auditory canal 2001 has a certain depth and can extend to the tympanic membrane, but for the convenience of description, the external auditory canal 2001 may refer to the ear hole of the ear 200 without special instructions in this application. In addition, the concha cavity 2002, the cymba concha 2003, the triangular fossa 2004 and other physiological parts may also have a certain volume and depth. The concha cavity 2002 may be directly connected to the external auditory canal 2001, that is, it can be regarded as the ear hole is located at the bottom of the concha cavity 2002.

[0032] It is understandable that there may be individual differences between different users, which may lead to different shapes, sizes and other size differences of the ear 200. For the convenience of description and to reduce (or even eliminate) the individual differences of different users, a simulator including a head and its ear (generally a left ear and a right ear, one of the ears is taken as an example here) 200 may be made based on standards such as ANS: S3.36, S3.25 and IEC: 60318-7, such as GRAS 45BC KEMAR, HEADAcoustics, B&K 4128 series or B&K 5128 series, etc., so as to present the scene of most users wearing the earphone 100 through the simulator. Taking GRAS KEMAR as an example, the simulator of the ear 200 may be any one of GRAS 45AC, GRAS 45BC, GRAS45CC or GRAS 43AG, etc. Taking HEAD Acoustics as an example, the simulator of the ear 200 may be any one of HMS II.3, HMS II.3LN or HMS II.3LN HEC.

[0033] It should be noted that in the fields of medicine and anatomy, three basic planes of the human body or human body simulator can be defined: the sagittal plane, the coronal plane, and the horizontal plane, as well as three basic axes: the sagittal axis, the coronal axis, and the vertical axis. Among them, the sagittal plane refers to a plane perpendicular to the ground along the front-back direction of the body, which divides the human body or human body simulator into left and right parts; the coronal plane refers to a plane perpendicular to the ground along the left-right direction of the body, which divides the human body or human body simulator into front and back parts; the horizontal plane refers to a plane parallel to the ground along the up-down direction of the body, which divides the human body or human body simulator into upper and lower parts. Correspondingly, the sagittal axis refers to an axis along the front-back direction of the body and perpendicular to the coronal plane, the coronal axis refers to an axis along the left-right direction of the body and perpendicular to the sagittal plane, and the vertical axis refers to an axis along the up-down direction of the body and perpendicular to the horizontal plane. Furthermore, the “front side of the ear” described in the present application is a concept relative to the “back side of the ear”. The former refers to the side of the ear away from the head, and the latter refers to the side of the ear facing the head. They are both for the ear 200 of the user or the simulator. When observing the ear 200 of the human body or the human body simulator along the direction of the coronal axis, it can be seen as follows: Figure 4 shown.

[0034] See also Figure 5 , Figure 5 yes Figure 1 Schematic diagram of the earphone 100 in some embodiments in a wearing state. The movement module 10 is located in front of the ear 200 in the wearing state. At least part of the ear hook 20 is located behind the ear 200 in the wearing state, so that the earphone 100 is hung on the ear 200 in the wearing state.

[0035] In the present application, when describing the process or action of wearing the headset 100, such as "wearing the headset 100", "the headset 100 is in a wearing state" and "in a wearing state", it can refer to the headset 100 being worn on the ear 200. Of course, precisely because of individual differences between different users, there may be some differences between the headset 100 worn by different users and the headset 100 worn on the ear 200 of the simulator, but such differences should be tolerated.

[0036] The core module 10 can be configured to not block the external auditory canal 2001 when worn, so that the earphone 100 is an "open earphone". It is understandable that the earphone 100 can be in different wearing states so that the core module 10 may partially block the external auditory canal 2001, but the external auditory canal 2001 is still not blocked.

[0037] See also Figure 1, Figure 2 and Figure 3 The core module 10 may have a connection end CE connected to the ear hook 20 and a free end FE not connected to the ear hook 20. In the wearing state, the free end FE of the core module 10 may extend into the concha cavity 2002, or may only cover at least a portion of the concha cavity 2002. The core module 10 and the ear hook 20 may be configured to clamp the ear 200 from the front and back sides of the ear 200 region corresponding to the concha cavity 2002, thereby increasing the resistance of the earphone 100 to fall off the ear 200, thereby improving the stability of the earphone 100 in the wearing state.

[0038] The core module 10 may have a thickness direction X and a length direction Y and a width direction Z that are perpendicular to the thickness direction X and orthogonal to each other. Among them, the length direction Y may be defined as the direction with the maximum extension dimension in the shape of the two-dimensional orthographic projection of the core module 10 on the plane (two-dimensional projection plane) where the outer surface of the core module 10 is located or on the sagittal plane (two-dimensional projection plane) (for example, when the shape of the two-dimensional orthographic projection is a rectangle or a rectangle approximately, the length direction Z is the length direction of the rectangle or the rectangle approximately), the width direction Z may be defined as the direction perpendicular to the length direction Y in the two-dimensional orthographic projection (for example, when the shape of the two-dimensional orthographic projection is a rectangle or a rectangle approximately, the width direction Z is the width direction of the rectangle or the rectangle approximately), and the thickness direction X may be defined as the direction perpendicular to the two-dimensional projection plane carrying the two-dimensional orthographic projection.

[0039] In some embodiments, when the movement module 10 is in a tilted state when being worn, the length direction Y and the width direction Z are still parallel or approximately parallel to the sagittal plane, and the length direction Y can have a non-0° angle with the sagittal axis, that is, the length direction Y can also be tilted accordingly, and the width direction Z can have a non-0° angle with the vertical axis, that is, the width direction Z is also tilted.

[0040] In some embodiments, the length direction Y can be defined as the direction in which the movement module 10 approaches or moves away from the back of the head in the wearing state, that is, the length direction Y can be parallel to the sagittal axis or have an angle other than 0°. The width direction Z can be defined as the direction in which the movement module 10 approaches or moves away from the top of the head in the wearing state, that is, the width direction Z can be parallel to the vertical axis or have an angle other than 0°. In some embodiments, the free end FE is pressed in the concha cavity 2002 in the thickness direction X. For another example, the free end FE abuts in the concha cavity 2002 in the length direction Y and / or the width direction Z. In some embodiments, the direction from the connecting end CE to the free end FE can be the length direction Y, which of course can be different from the length direction Y due to structural requirements.

[0041] It can be understood that, in some embodiments, the length direction Y can also be defined as the direction from the connecting end of the movement module 10 to the free end of the movement module 10, the thickness direction X can be defined as the direction of the movement module 10 toward or away from the user's ear when worn, and the width direction Z is perpendicular to the thickness direction X and orthogonal to the length direction Y.

[0042] It should be noted that: in the wearing state, the free end FE of the movement module 10 not only extends into the concha cavity 2002, but also can be projected onto the antihelix 2005, and can also be projected onto the left and right sides of the head and located in front of the ear 200 on the sagittal axis.

[0043] Of course, in other scenarios, at least part of the movement module 10 can also be projected onto the antihelix 2005, or onto the left and right sides of the head and located in front of the ear 200 on the sagittal axis.

[0044] In other words, the ear hook 20 can support the movement module 10 to be worn at the concha cavity 2002 , the antihelix 2005 , the front side of the ear 200 , and other wearing positions.

[0045] See also Figure 1 , Figure 2 and Figure 5 In the wearing state and observed along the direction of the coronal axis, the movement module 10 can be set to a circular, oval, rounded square, rounded rectangle, etc. Therefore, for the convenience of description, this embodiment takes the movement module 10 set to a rounded rectangle as an example for exemplary description. In some embodiments, the length of the movement module 10 in the length direction Y can be greater than the width of the movement module 10 in the width direction Z.

[0046] The core module 10 may have an inner side surface IS facing the ear 200 along the thickness direction X in the wearing state, an outer side surface OS away from the ear 200, and a connection surface (such as the lower side surface LS, the upper side surface US, and the outer end surface RS, etc.) connecting the inner side surface IS and the outer side surface OS. Among them, when the core module 10 is in the wearing state, the upper side surface US connects the inner side surface IS and the outer side surface OS, the lower side surface LS connects the inner side surface IS and the outer side surface OS, the upper side surface US is closer to the top of the user's head along the width direction Z, the lower side surface LS is farther away from the top of the user's head along the width direction Z, and the outer end surface RS connects the upper side surface US and the lower side surface LS, and may also connect the inner side surface IS and the outer side surface OS. The thickness direction X can also be defined as the direction in which the core module 10 approaches or moves away from the ear 200 in the wearing state. At least part of the connection surface, such as the outer end surface RS, is located in the concha cavity 2002 in the wearing state, and forms a first contact area with the front side of the ear 200 area. That is, the outer end surface RS can be located at one end facing the back of the head in the length direction Y in the wearing state, and at least partially located in the concha cavity 2002. In some embodiments, the ear hook 20 forms a second contact area with the rear side of the ear 200 region in the wearing state. The second contact area and the first contact area at least partially overlap in the ear thickness direction of the ear 200 region. Furthermore, the movement module 10 and the ear hook 20 can jointly clamp the ear 200 from the front and back sides of the ear 200, and the clamping force formed is mainly manifested as compressive stress, which is beneficial to improve the stability and comfort of the earphone 100 in the wearing state. In some embodiments, when the movement module 10 is set to a circular, elliptical or other shape, the connecting surface may also refer to the arc-shaped side of the movement module 10.

[0047] It should be noted that the terms "first", "second", "third", etc. in this application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined by the terms "first", "second", "third", etc. may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] It is understandable that the core module 10 can also be worn directly or by other means, and can even be worn by connecting with other structures in a manner of cooperating with the ear hook 20. Furthermore, the functions of the core module 10 are not limited to the embodiments listed in the present application. In some embodiments, the ear hook 20 can be omitted or replaced by other structures.

[0049] In addition, when the wearing mode of the core module 10 changes, the matching mode of the core module 10 and the ear 200 may also change, but in some embodiments, the internal structure, overall structure, and external structure of the core module 10 do not necessarily change. Even in some embodiments, words related to orientation, such as the lower side surface LS, the upper side surface US, and the outer end surface RS, do not necessarily form a corresponding relationship with the ear 200. Of course, in some embodiments, words such as the connection end CE can be made into only words related to orientation, which does not necessarily mean that a certain function is necessarily included.

[0050] Furthermore, when the wearing method of the core module 10 changes, the core module 10 may not be matched with the ear hook 20 or other structures at the connection end CE to achieve wearing.

[0051] See also Figure 6 and Figure 7 , Figure 6 yes Figure 1 A cross-sectional view of the middle earphone 100 along line VI-VI in some embodiments, Figure 7 yes Figure 1 The middle earphone 100 is a cross-sectional view along line VII-VII in some embodiments. The movement module 10 may include a movement housing 11, a speaker assembly 12 and a main control circuit board 13. Among them, the movement housing 11 can be connected to the ear hook 20. The movement housing 11 may have an installation space 101 for installing the speaker assembly 12 and the main control circuit board 13, and of course it can also be used to install other electronic components, which will not be repeated. The speaker assembly 12 and the main control circuit board 13 can be arranged in the movement housing 11, such as the installation space 101. The main control circuit board 13 can be electrically connected to the speaker assembly 1 to control the operation of the speaker assembly 12. It can be understood that the movement housing 11 serves as the outer housing of the movement module 10, and then the inner side IS, the outer side OS and the connection surface connecting the inner side IS and the outer side OS of the aforementioned movement module 10 (such as the lower side LS, the upper side US and the rear side RS, etc.) are all formed on the movement housing 11 as the outer surface of the movement housing 11.

[0052] The movement housing 11 may include a first housing 111 and a second housing 112 that are buckled together to form an installation space 101 along the thickness direction X. The first housing 111 is closer to the ear 200 than the second housing 112 when worn. A parting surface 102 is provided between the first housing 111 and the second housing 112 to simplify the structure of the movement housing 11 and reduce processing costs. Of course, the movement housing 11 may also be in other structural forms and is not limited to the embodiments listed in this application.

[0053] In some embodiments, the core housing 11 may be provided with a first sound outlet hole 1101 and a second sound outlet hole 1102 that are connected to the installation space 101. The first sound outlet hole 1101 and the second sound outlet hole 1102 may cooperate with the speaker assembly 12 respectively, so that the sound waves generated by the speaker assembly 12 may be propagated through the first sound outlet hole 1101 and the second sound outlet hole 1102 respectively. The first sound outlet hole 1101 and the second sound outlet hole 1102 may not be connected, and the provision of two sound outlet holes may improve the auditory experience of the speaker assembly 12 and avoid sound wave interference between multiple speakers.

[0054] See also Figure 8 , Figure 8 yes Figure 6 Schematic diagram of the structure of the first shell 111 in some embodiments. In some embodiments, the first sound outlet hole 1101 and / or the second sound outlet hole 1102 can be set on the first shell 111. For example, the first sound outlet hole 1101 and the second sound outlet hole 1102 can both be set on the bottom wall 1111 of the first shell 111. In some embodiments, the bottom wall 1111 can be set corresponding to the inner side surface IS of the movement module 10. When the wearing method of the movement module 10 extending into the concha cavity 2002 is adopted, since the concha cavity 2002 has a certain volume and depth, after the free end FE extends into the concha cavity 2002, the part of the inner side surface IS corresponding to the bottom wall 1111 of the movement shell 11 can have a certain distance from the concha cavity 2002. Furthermore, the movement housing 11 can cooperate with the concha cavity 2002 to form an auxiliary cavity connected to the external auditory canal 2001 when the earphone is worn, and the first sound outlet hole 1101 and the second sound outlet hole 1102 will at least partially correspond to the auxiliary cavity and be connected to the auxiliary cavity. Furthermore, in the worn state, the sound waves generated by the speaker assembly 12 and propagated through the first sound outlet hole 1101 and the second sound outlet hole 1102 will be restricted by the auxiliary cavity, that is, the auxiliary cavity can gather the sound waves, so that the sound waves can be propagated more into the external auditory canal 2001, thereby increasing the volume and sound quality of the sound heard by the user in the near field, which is conducive to improving the acoustic effect of the earphone 100.

[0055] In some embodiments, the first sound outlet 1101 and the second sound outlet 1102 are closer to the free end FE than to the connection end CE, so that the first sound outlet 1101 and the second sound outlet 1102 are closer to the external auditory canal 2001 when worn. In some embodiments, the movement module 10 can be configured not to block the external auditory canal 2001 when worn, and the auxiliary cavity can be configured in a semi-open state.

[0056] See also Figure 7 and Figure 8The first shell 111 may be a plastic part, or may be a structure composed of or composited from a variety of materials, and of course may also be a shell structure made of other materials. The first shell 111 may include a first side wall 1112 extending from the edge of the bottom wall 1111 to a side close to the second shell 112. In some embodiments, a pressure relief hole 1104 and / or a tuning hole 1105 may be provided on the first side wall 1112, that is, a pressure relief hole 1104 and / or a tuning hole 1105 may be provided on the upper side US or the lower side LS corresponding to the movement shell 11. Furthermore, a sound resistance net and / or a protective steel net may be provided at the pressure relief hole 1104 and / or the tuning hole 1105.

[0057] It is understandable that the positions of the acoustic holes such as the pressure relief hole 1104 and the tuning hole 1105 can be adjusted on the movement housing 11, such as the first housing 111, according to the needs of those skilled in the art. For example, the pressure relief hole 1104 and the tuning hole 1105 can be respectively arranged on opposite sides of the first side wall 1112 along the width direction Z.

[0058] In addition, since the first sound outlet hole 1101, the pressure relief hole 1104 and the tuning hole 1105 can all be arranged on the first shell 111, the structure of the first shell 111 is simpler, which is conducive to reducing the processing cost. In addition, since the pressure relief hole 1104 and the tuning hole 1105 are respectively arranged on the opposite sides of the first side wall 1112 along the width direction Z, the above-mentioned parting surface 102 can be arranged approximately symmetrically with respect to a reference surface perpendicular to the width direction Z, which is conducive to improving the appearance quality of the movement module 10.

[0059] Furthermore, the acoustic holes may not be limited to the pressure relief hole 1104 and the tuning hole 1105, but may also include other acoustic holes that cooperate with the speaker assembly 12. In some embodiments, at least one of the pressure relief hole 1104 and the tuning hole 1105 may be omitted.

[0060] See also Fig. 9 , Fig. 9 yes Figure 8 Schematic diagram of the structure of the first shell 111 under another viewing angle. The first sound hole 1101 and the second sound hole 1102 are arranged adjacent to each other, and the positions of the sound holes are arranged reasonably, so that in the wearing state, the volume of the sound output by the first sound hole 1101 and the second sound hole 1102 is balanced to enhance the user's listening experience. In some embodiments, the first sound hole 1101 may be arranged around the circumference of the second sound hole 1102 to further enhance the sound magnetism of the speaker assembly 12. Of course, compared with the first sound hole 1101 arranged in a straight line, the surrounding arrangement of the first sound hole 1101 is more conducive to having a sufficient opening area of ​​the sound hole within the limited setting space on the first shell 111, thereby ensuring the consistency of listening for different people.

[0061] In some embodiments, a protrusion 1113 protruding in the thickness direction X may be provided on the inner side surface IS of the movement housing 11 (e.g., the bottom wall 1111 corresponding to the inner side surface IS). The second sound outlet 1102 may be provided on the protrusion 1113, and part of the speaker assembly 12 may be accommodated inside the protrusion 1113, so that the part of the speaker assembly 12 accommodated in the protrusion 1113 can be closer to the user's ear canal in the wearing state, and the sound path of the sound wave generated by the speaker assembly 12 and transmitted through the second sound outlet 1102 to the external auditory canal 2001 becomes shorter, reducing the loss of the sound wave and increasing the sound pressure level in the external auditory canal 2001. Of course, in some embodiments, the first sound outlet 1101 may also be provided on the protrusion 1113, and the first sound outlet 1101 may be closer to or directly opposite the concha cavity 2002 through the protrusion 1113, so that the sound output by the first sound outlet 1101 is reflected and enhanced through the concha cavity 2002 and other physiological parts. In some embodiments, the first sound outlet hole 1101 can be arranged around the periphery of the raised portion 1113, so that the structure of the movement shell 11 is more compact. At the same time, when worn, the difference in the sound path of the sound transmitted through the first sound outlet hole 1101 and the second sound outlet hole 1102 respectively reaching the user's ear canal 2001 is small, ensuring the consistency of listening.

[0062] In some embodiments, the raised portion 1113 is raised and extends in a direction away from the inner side IS compared to other areas on the inner side IS of the movement housing 11 (for example, the bottom wall 1111 corresponding to the inner side IS). In other embodiments, the raised portion 1113 can also be set on the lower side or other connecting surfaces of the movement housing 11 to adapt to different wearing scenarios.

[0063] In some embodiments, the cross-sectional area of ​​the protrusion 1113 perpendicular to the thickness direction X may gradually decrease in a direction away from the movement housing 11 .

[0064] See also Fig. 9 , the first sound outlet hole 1101 may include a first hole segment 1114 and a second hole segment 1115. In some embodiments, the first hole segment 1114 and the second hole segment 1115 may be disposed on the inner side surface IS. Fig. 9, the first hole segment 1114 is located on the side of the second sound outlet 1102 close to the lower side LS, and the second hole segment 1115 is located on the side of the second sound outlet 1102 close to the outer end surface RS. With such an arrangement, in the wearing state (for example, the free end FE of the movement module 10 extends into the concha cavity 2002), the first sound outlet 1101 is closer to the user's external auditory canal 2001, so that the sound output by the movement module 10 can be more transmitted to the user's external auditory canal 2001, ensuring the listening volume. For another example, the first hole segment 1114 is located on the side of the second sound outlet 1102 close to the lower side LS, and the second hole segment 1115 is located on the side of the second sound outlet 1102 away from the outer end surface RS. With such an arrangement, it is possible to avoid the opening of the second hole segment 1115 affecting the user's wearing experience.

[0065] In some embodiments, the first hole segment 1114 may also be set at the corner where the inner side surface IS connects to the lower side surface LS, and the second hole segment 1115 is set at the corner where the inner side surface IS connects to the outer end surface RS. In the wearing state (for example, the movement module 10 partially rests against the antihelix 2005), the first sound outlet 1101 can point to the user's external auditory canal 2001, thereby improving the directivity of the sound and the listening volume. In other embodiments, the first hole segment 1114 may be set on the inner side surface IS, and the second hole segment may be set at the corner where the inner side surface IS connects to the outer end surface RS. In some embodiments, the first hole segment 1114 may be set on the connecting surface between the inner side surface IS and the lower side surface LS (for example, the corner where the inner side surface IS connects to the lower side surface LS). In some embodiments, the second hole segment 1115 is set on the connecting surface between the inner side surface IS and the outer end surface RS (for example, the corner where the inner side surface IS connects to the outer end surface RS).

[0066] In some embodiments, the first hole segment 1114 extends from the connection with the second hole segment 1115 along the length direction Y, and the width in the width direction Z is 1mm-2.5mm, and the second hole segment 1115 extends from the connection with the first hole segment 1114 along the width direction Z, and the width in the length direction Y is 1mm-2.5mm. In some embodiments, the first hole segment 1114 extends from the connection with the second hole segment 1115 along the length direction Y, and the width in the width direction Z gradually decreases. At the same time, the second hole segment 1115 extends from the connection with the first hole segment 1114 along the width direction Z, and the width in the length direction Y gradually increases. Such an arrangement can avoid the first hole segment 1114 closer to the lower side surface LS or the upper side surface US from having sound wave interference with other acoustic holes opened on the lower side surface LS or the upper side surface US, thereby ensuring the air permeability of the first sound outlet 1101 and avoiding affecting the user's listening.

[0067] In some embodiments, the pressure relief hole 1104 can be disposed on the upper side US, or on the lower side LS. In addition, when the pressure relief hole 1104 cooperates with the first sound outlet hole 1101, it is helpful to reduce the mutual influence between the pressure relief hole 1104 and the first sound outlet hole 1101, such as the first hole section 1114 and the second hole section 1115.

[0068] In some embodiments, the first sound outlet hole 1101 may further include a third hole segment 1116. Fig.10 and Fig.11 , Fig.10 yes Fig. 9 Schematic diagram of the arrangement of the first sound outlet hole 1101 and the second sound outlet hole 1102 in other embodiments, Fig.11 yes Fig.10 Schematic diagram of the arrangement of the first sound outlet hole 1101 and the second sound outlet hole 1102 in other embodiments. The third hole segment 1116 can be connected to the end of the second hole segment 1115 away from the first hole segment 1114, and is located on the side of the second sound outlet hole 1102 away from the first hole segment 1114. In some embodiments, the third hole segment 1116 can be arranged on the inner side surface IS, and is located on the side of the second sound outlet hole 1102 close to the upper side surface US, at this time, the first hole segment 1114 is located on the side of the second sound outlet hole 1102 close to the lower side surface LS, that is, the third hole segment 1116 is connected to the second hole segment 1115, and is located on the opposite sides of the second sound outlet hole 1102 with the first hole segment 1114, so that the second hole segment 1115 connects the first hole segment 1114 and the third hole segment 1116 to form a whole. In some embodiments, the third hole segment 1116 can be arranged at the corner where the inner side surface IS connects to the upper side surface US. In some embodiments, the third hole segment 1116 may be disposed on a connecting surface between the inner side surface IS and the upper side surface US (eg, at a corner where the inner side surface IS connects to the upper side surface US).

[0069] In some embodiments, the third hole segment 1116 can be arranged so that the first sound outlet 1101 is symmetrical along the length direction Y and has a symmetry plane PS arranged along the length direction Y, so that the first sound outlet 1101 has a "U-shaped" structure with the opening facing away from the outer end surface RS.

[0070] In other embodiments, the third hole segment 1116 is disposed on the side of the second sound outlet hole 1102 away from the outer end surface RS, and the third hole segment 1116 is connected to the end of the first hole segment 1114 away from the second hole segment 1115, in which case the first sound outlet hole 1101 has a "U-shaped" structure with its opening facing the upper side surface US. In other embodiments, the first hole segment 1114 is located on the side of the second sound outlet hole 1102 close to the upper side surface US, the third hole segment 1116 is disposed on the side of the second sound outlet hole 1102 away from the outer end surface RS, and the third hole segment 1116 is connected to the end of the first hole segment 1114 away from the second hole segment 1115, in which case the first sound outlet hole 1101 has a "U-shaped" structure with its opening facing the lower side surface LS.

[0071] See also Fig. 9 , Fig.10 and Fig.11 , along the length direction Y, the distance from the reference point a on the first sound outlet hole 1101 that is farthest from the free end FE to the outer end surface RS is not less than 9 mm. It should be understood that when the outer end surface RS is an arc surface, the distance from the reference point a to the section on the outer end surface RS that is farthest from the connecting end CE along the length direction Y and perpendicular to the length direction Y is not less than 9 mm. In some embodiments, along the length direction Y, the distance from the reference point a on the first sound outlet hole 1101 that is farthest from the free end FE to the outer end surface RS is within 10 mm-20 mm. With such a configuration, the layout of the first sound outlet hole 1101 on the movement housing 11 can be optimized to ensure the air permeability of the first sound outlet hole 1101.

[0072] In some embodiments, along the width direction Z, the distance between the reference point b on the hole edge of the first sound outlet 1101 closest to the upper side surface US and the upper side surface US may be not less than 1.5mm. It should be understood that when the upper side surface US is an arc surface, the distance between the reference point b and the section of the upper side surface US connected to the farthest reference point of the lower side surface LS along the width direction Z and perpendicular to the width direction Z is not less than 1.5mm. In some embodiments, along the width direction Z, the distance between the reference point b on the hole edge of the first sound outlet 1101 closest to the upper side surface US and the upper side surface US is 2mm-8mm. In this way, the layout of the first sound outlet 1101 on the movement housing 11 can be optimized to avoid interference between the sound waves emitted by the first sound outlet 1101 and the sound waves emitted by other acoustic holes opened on the upper side surface US, thereby ensuring the user's listening effect.

[0073] See also Fig.10 and Fig.11, the first sound outlet hole 1101 and the second sound outlet hole 1102 can be approximately arranged on a plane perpendicular to the thickness direction X. In some embodiments, on a plane perpendicular to the thickness direction X, the shortest distance L between the hole edge of the orthographic projection of the first sound outlet hole 1101 and the hole edge of the orthographic projection of the second sound outlet hole 1102 can constrain the relative position relationship between the first sound outlet hole 1101 and the second sound outlet hole 1102. In some embodiments, the shortest distance L between the hole edge of the orthographic projection of the first sound outlet hole 1101 and the hole edge of the orthographic projection of the second sound outlet hole 1102 is not less than 2mm, thereby avoiding the sound waves propagated by the first sound outlet hole 1101 and the second sound outlet hole 1102 from causing sound wave interference and affecting the user's listening. In some embodiments, the shortest distance L between the hole edge of the orthographic projection of the first sound outlet hole 1101 and the hole edge of the orthographic projection of the second sound outlet hole 1102 is in the range of 2mm-5mm, while avoiding sound wave interference, ensuring that the first sound outlet hole 1101 has sufficient ventilation area.

[0074] See also Fig.12 , Fig.12 yes Figure 1 A cross-sectional view of the middle earphone 100 along line VII-VII in other embodiments. The second sound outlet 1102 may have a central axis AE, and the direction of the central axis AE away from the side of the movement housing 11 may be the positive direction. In some embodiments, the extension direction of the second sound outlet 1102 may be the central axis AE. In some embodiments, the centroid of the opening surface of the second sound outlet 1102 on the inner side surface IS, and the centroid of the opening surface on the inner surface in the installation space 101 of the movement housing 11, and the line between the two centroids may also be referred to as the central axis AE. In some embodiments, the central axis AE of the second sound outlet 1102 may be perpendicular to the side surface (e.g., the inner side surface IS) of the movement housing 11 where the second sound outlet is located. In some embodiments, the positive direction of the central axis AE of the second sound outlet 1102 is set to form an angle less than 90° with the side surface (e.g., the inner side surface IS) of the movement housing 11 where the second sound outlet is located, so as to allow the second sound outlet 1102 to be more biased toward the external auditory canal 2001, thereby improving the user's listening effect. For example, when the second sound outlet hole is disposed on the inner side surface IS of the movement housing 11, the positive direction of the central axis AE of the second sound outlet hole 1102 may be inclined toward the upper side surface US, the lower side surface LS or the outer end surface RS. In some embodiments, the angle between the positive direction of the central axis AE of the second sound outlet hole 1102 and the positive direction of the width direction Z is between 75° and 80°, and the positive direction of the width direction Z may be the direction along the width direction Z pointing from the upper side surface US to the lower side surface LS.

[0075] In some embodiments, see Fig. 9 , Fig.10 and Fig.11The size of the first sound hole 1101 in the length direction Y is in the range of 6mm-8mm, and the size of the first sound hole 1101 in the width direction Z is in the range of 5mm-7mm. This arrangement can ensure that the first sound hole 1101 has sufficient air permeability area and can ensure that the resonant frequency of the speaker cavity coupled to the first sound hole 1101 is within an ideal range.

[0076] See also Figure 6 , Figure 7 and Figure 8 , a recessed area 1103 is formed on the inner wall of the core housing 11, which is used to cooperate with the speaker assembly 12, improve the space utilization rate of the core housing 11, such as the installation space 101, and also facilitate the positioning of the speaker assembly 12. In some embodiments, the recessed area 1103 can be arranged around the second sound outlet hole 1102, so that the space in the recessed area 1103 is connected to the second sound outlet hole 1102. In some embodiments, the recessed area 1103 can be arranged corresponding to the raised portion 1113, that is, the recessed area 1103 is arranged on the side of the raised portion 1113 facing the core housing 11, such as the inside of the installation space 101, and the speaker assembly 12 can be at least partially arranged in the recessed area 1103.

[0077] See also Figure 6 The second housing 112 may be a plastic part, or a structure composed of or composited from a variety of materials, or may be a housing structure made from other materials. The parting surface 102 between the second housing 112 and the first housing 111, such as the first side wall 1112, extends or bends toward the side where the first housing 111 is located in the direction close to the free end FE. The second housing 112 may include a top wall 1121 disposed opposite to the first housing 111, such as the bottom wall 1111, and a second side wall 1122 connected to the top wall 1121 and engaged with the first housing 111, such as the first side wall 1112.

[0078] It can be understood that, due to the arrangement of the second side wall 1122 , the free end FE is tapered in a direction away from the connection end CE, so as to facilitate coordination with the contour of the user's ear and enhance the wearing experience.

[0079] See also Figure 6 , Figure 7 and Fig.13 , Fig.13 for Figure 6Schematic diagram of the structure of the speaker assembly 12. The speaker assembly 12 can convert the received electrical signal into a sound signal (sound wave), and can propagate through the first sound outlet 1101 and / or the second sound outlet 1102, so as to be transmitted into the external auditory canal 2001. The speaker assembly 12 can be coupled to the main control circuit board 13 to allow operation under the control of the main control circuit board 13. The speaker assembly 12 may include a first speaker 121 and a second speaker 122 arranged in the movement housing 11, such as the installation space 101. The first speaker 121 and the second speaker 122 can be coupled to the main control circuit board 13, respectively, to allow operation under the control of the main control circuit board 13. The sound waves generated by the first speaker 121 can be propagated from the first sound outlet 1101. The sound waves generated by the second speaker 122 can be propagated from the second sound outlet 1102. In some embodiments, the sound waves generated by the first speaker 121 and the sound waves generated by the second speaker 122 may also be propagated through other acoustic holes (such as the pressure relief hole 1104 and the tuning hole 1105 ) disposed on the movement housing 11 .

[0080] In some embodiments, the sound waves generated by the first speaker 121 may be propagated from the first sound outlet hole 1101 (e.g., the first hole segment 1114 and the second hole segment 1115), and the sound waves generated by the second speaker 122 may be propagated from the second sound outlet hole 1102. Of course, the sound waves generated by the first speaker 121 may also be propagated from the third hole segment 1116.

[0081] The frequency range of the sound output by the first speaker 121 is at least partially lower than the frequency range of the sound output by the second speaker 122. In some embodiments, the frequency range of the sound output by the first speaker 121 may be smaller than the frequency range of the sound output by the second speaker 122 as a whole. In other embodiments, the frequency range of the sound output by the first speaker 121 partially overlaps with the frequency range of the sound output by the second speaker 122, and the maximum frequency of the sound output by the first speaker is lower than the maximum frequency of the sound output by the second speaker, so that the frequency band of the sound output by the second speaker 122 may be partially greater than the frequency band of the sound output by the first speaker 121.

[0082] In some embodiments, the frequency range of the sound output by the first speaker 121 may include 20 Hz-5 kHz, and the frequency range of the sound output by the second speaker 122 may include 5 kHz-20 kHz. In some embodiments, the frequency range of the sound output by the first speaker 121 and the frequency range of the sound output by the second speaker 122 may have different standards based on actual conditions. For example, the range of the sound output by the first speaker 121 may also refer to a frequency range not higher than 1 kHz, such as 1 Hz-1 kHz, 100 Hz-800 Hz, etc.

[0083] In some embodiments, the frequency range of the sound output by the first speaker 121 can be referred to as a low frequency band or a mid-low frequency band, and the frequency range of the sound output by the second speaker 122 can be referred to as a high frequency band or a mid-high frequency band. Furthermore, the first speaker 121 can be referred to as a low frequency speaker, and the second speaker 122 can be referred to as a high frequency speaker. The low frequency band can be at least a portion of a frequency band of substantially 20 Hz to 500 Hz, or at least a portion of a frequency band of substantially 20 Hz to 3 kHz, and the high frequency band can be at least a portion of a frequency band of substantially 5 kHz to 20 kHz, or at least a portion of a frequency band of 6 kHz to 16 kHz. The mid-frequency band can be between the low frequency band and the high frequency band, and can also partially overlap with the low frequency and / or high frequency. Furthermore, the mid-low frequency band can be a collection of the low frequency band and the mid-frequency band, and the mid-high frequency band can be a collection of the mid-frequency band and the high frequency band.

[0084] It is understandable that the distinction of the above frequency bands is just an example to give a rough range. The definition of the above frequency bands can change with different industries, different application scenarios and different classification standards. For example, in some other application scenarios, low frequency refers to the frequency band of roughly 20Hz to 80Hz, medium-low frequency can refer to the frequency band of roughly 80Hz-160Hz, medium frequency can refer to the frequency band of roughly 160Hz to 1280Hz, medium-high frequency can refer to the frequency band of roughly 1280Hz-2560Hz, and high frequency can refer to the frequency band of roughly 2560Hz to 120KHz.

[0085] See also Figure 6 and Figure 7 , the first speaker 121 can be fixed in the core housing 11, and the axial direction of the first speaker 121 can be set along the thickness direction X. In some embodiments, the first speaker 121 can be fixed on the first housing 111, such as the bottom wall 1111, and can also be fixed on the first side wall 1112 or other parts of the core housing 11. In some embodiments, the axial direction of the first speaker 121 can be the vibration direction of the first diaphragm 1211.

[0086] In some embodiments, the first speaker 121 is in a strip-shaped structure to match the movement housing 11, such as the installation space 101, that is, the first speaker 121 can be extended in the direction from the connection end CE to the free end FE, so as to facilitate the setting of a sufficiently large first speaker 121 in the movement housing 11, such as the installation space 101, thereby enhancing the sound volume generated by the earphone 100, that is, optimizing the arrangement and improving space utilization.

[0087] See also Figure 7The first speaker 121 may include a first diaphragm 1211 for vibrating and making sounds, and may also include a first magnetic circuit system 1212 for driving the first diaphragm 1211 to vibrate and make sounds, and a support member that supports the first diaphragm 1211 and the first magnetic circuit system 1212. Within the scope of understanding of those skilled in the art, the technical principle of how the first magnetic circuit system 1212 drives the first diaphragm 1211 to vibrate and make sounds by cooperating with the first coil and the magnet will not be repeated.

[0088] The first speaker 121 is in the movement housing 11 (for example, in the installation space 101) and cooperates with the movement housing 11, and a first front cavity 1201 can be formed on the front side of the first diaphragm 1211 of the first speaker 121, and a first rear cavity 1202 can be formed on the rear side of the first diaphragm 1211. The front side of the first diaphragm 1211 refers to the side of the first diaphragm 1211 facing away from the first magnetic circuit system 1212, and the rear side of the first diaphragm 1211 refers to the side of the first diaphragm 1211 facing the first magnetic circuit system 1212. In some embodiments, the first front cavity 1201 is located on the side of the first speaker 121 facing the inner side IS of the movement housing 11, such as the side facing the bottom wall 1111 of the first housing 111, and the first rear cavity 1202 is located on the side of the first speaker 121 facing away from the inner side IS, such as the side facing away from the bottom wall 1111 of the first housing 111. In some embodiments, the first front cavity 1201 may be connected to the first sound outlet 1101, so that the sound waves generated by the first speaker 121 and the first front cavity 1201 can be propagated through the first sound outlet 1101. The first rear cavity 1202 may be coupled with other acoustic holes (such as the pressure relief hole 1104 and the tuning hole 1105) provided on the movement housing 11, so that the sound waves generated by the first speaker 121 and the first rear cavity 1202 can be propagated through other acoustic holes.

[0089] The second speaker 122 is disposed in the movement housing 11. Figure 6 and Figure 7 , the second speaker 122 can be fixed on the first housing 111, for example, the bottom wall 1111, and the axial direction of the second speaker 122 can be along the thickness direction X. In some implementations, the second speaker 122 can be located in the first front cavity 1201 of the first speaker 121, and the axial direction of the first speaker 121 is parallel to the axial direction of the second speaker 122. In other embodiments, the second speaker 122 can of course be fixed on the first side wall 1112 or other parts of the movement housing 11, or can be located outside the first front cavity 1201 based on the setting requirements, and the axial direction of the second speaker 122 can of course be arranged to cross the thickness direction X.

[0090] In some embodiments, the second speaker 122 may be embedded in the inner wall of the core housing 11. For example, a groove may be provided on the inner wall of the core housing 11 to accommodate the second speaker 122, so as to realize the embedded setting of the second speaker 122. Figure 7 , the groove (e.g., the recessed area 1103) for accommodating the second speaker 122 can be provided on the bottom wall 1111 of the first housing 111. At this time, in the wearing state, the second speaker 122 is located on the inner wall of the inner side surface IS of the aforementioned movement module 10, and the second speaker 122 is closer to the user's ear. For another example, the groove for accommodating the second speaker 122 can be provided on the lower side surface of the aforementioned movement module 10 or on the inner wall of each connecting surface to adapt to different wearing scenarios and bring better hearing experience to the user.

[0091] See also Fig.14 , Fig.14 1 is a circuit diagram of the speaker assembly 12 in some embodiments of the present application. The speaker assembly 12 may have a first terminal 1301 and a second terminal 1302 electrically connected to the main control circuit board 13, respectively. The first speaker 121 may be connected in series between the first terminal 1301 and the second terminal 1302, and may then make a sound under the control of the main control circuit board 13. The second speaker 122 may be connected in series between the first terminal 1301 and the second terminal 1302, and may then make a sound under the control of the main control circuit board 13.

[0092] As mentioned above, the first front cavity 1201 and the first rear cavity 1202 of the first speaker 121 are coupled with the first sound outlet 1101 and other acoustic holes (such as the pressure relief hole 1104) on the movement housing 11 respectively. Since the first front cavity 1201 and the first rear cavity 1202 are located on both sides of the first diaphragm 1211, the sound waves outputted respectively are naturally in anti-phase, so the sound waves outputted by the first front cavity 1201 and the first rear cavity 1202 can cancel each other out in anti-phase in the far field, thereby reducing the sound leakage of the earphone 100. However, when the frequency band of the output sound is higher, the wavelength of the sound in the high frequency band is shorter. Under the far-field condition, the first front cavity 1201 and the first rear cavity 1202 are equivalent to two sound sources, so that the distance between the two sound sources cannot be ignored compared to the wavelength, resulting in that the sound signals emitted by the two sound sources cannot be offset. In addition, when the acoustic transmission structure of the earphone 100 resonates, there is a certain phase difference between the phase of the sound signal actually radiated by the first front cavity 1201 and the first rear cavity 1202 and the original phase of the sound wave generation position, and an additional resonance peak is added to the transmitted sound wave, resulting in chaotic sound field distribution and difficulty in ensuring the far-field sound leakage reduction effect at high frequencies, and may even increase sound leakage.

[0093] Therefore, it is necessary to process the higher frequency band sound output by the first speaker 121 to avoid obvious far-field sound leakage in the higher frequency band. Accordingly, some embodiments of the present application can make the first speaker 121 only output lower frequency band sound. In the lower frequency band, the phase of the sound wave generated by the aforementioned first speaker 121 is basically not affected by the cavity structure (such as the first front cavity 1201 and / or the first rear cavity 1202), and can offset each other in the far field, thereby reducing far-field sound leakage. At the same time, the second speaker 122 can only output higher frequency band sound. By utilizing the strong directivity of the higher frequency band sound, the higher frequency band sound can be mainly radiated to the direction of the external auditory canal 2001 of the human ear, thereby reducing sound leakage. This ensures that the headset 100 achieves the effect of reducing sound leakage in the full frequency band.

[0094] In some embodiments, the first front cavity 1201 may have a first resonant frequency, and the first rear cavity 1202 may have a second resonant frequency.

[0095] For illustrative purposes only, the test method for the first resonant frequency may be: placing a test instrument such as a microphone close to and facing the earphone 100 (for example, facing the first sound outlet 1101 coupled to the first front cavity 1201) according to measurement methods and standards well known to those skilled in the art, and stimulating the earphone 100 through a signal generator such as a main control circuit board 13 to complete the test. A frequency response curve related to the first front cavity 1201 may be obtained by test, and the first resonant frequency may be further analyzed from the frequency response curve.

[0096] In addition, the testing method for the second resonant frequency can be: place a testing instrument such as a microphone close to and facing the earphone 100 (for example, facing the acoustic hole coupled to the first rear cavity 1202, such as the pressure relief hole 1104) according to the measurement method and standard well known to those skilled in the art, and stimulate the earphone 100 through a signal generator such as the main control circuit board 13 to complete the test. The frequency response curve related to the first rear cavity 1202 can be tested and obtained, and the second resonant frequency can be further analyzed from the frequency response curve.

[0097] It can be understood that the distance between the test instrument such as a microphone and the earphone 100 (for example, the acoustic hole such as the first sound outlet hole 1101 and the pressure relief hole 1104) should be determined according to the measurement method and requirements of the standard well known to those skilled in the art. Of course, this distance can also be limited to be less than a preset distance threshold (for example, 5 cm).

[0098] The first front cavity 1201 and the first sound outlet 1101 can be approximately regarded as a Helmholtz resonance cavity model, the first front cavity 1201 is the cavity of the Helmholtz resonance cavity model, and the first sound outlet 1101 is the neck of the Helmholtz resonance cavity model. At this time, the resonance frequency of the Helmholtz resonance cavity model is the first resonance frequency of the first front cavity 1201. In the Helmholtz resonance cavity model, the volume of the first front cavity 1201 can affect the first resonance frequency f of the first front cavity 1201, and the specific relationship is as follows:

[0099]

[0100] In formula (1), c is the speed of sound in air, S is the sound outlet area (also called cross-sectional area) of the neck (e.g., the first sound outlet 1101), V is the volume of the cavity (e.g., the first front cavity 1201), and L is the depth of the neck (e.g., the first sound outlet 1101).

[0101] It can be seen from formula (1) that the first resonant frequency f can be adjusted by changing the sound outlet area S of the first sound outlet 1101 or the volume V of the first front cavity 1201. For example, when other conditions remain unchanged, when the volume of the first front cavity 1201 increases, the first resonant frequency f moves to a low frequency. Similarly, the first rear cavity 1202 and the acoustic hole coupled thereto can also be approximately regarded as a Helmholtz resonant cavity model, and the second resonant frequency can be adjusted. No further details will be given here.

[0102] In some embodiments, the second resonant frequency may be less than the first resonant frequency, and the difference between the first resonant frequency and the second resonant frequency may be no greater than 1000 Hz. This arrangement can make the sound emitted from the first front cavity 1201 and the first rear cavity 1202 to the outside world cancel each other better in the far field, reduce sound leakage of the earphone, and enhance the user's privacy experience. For example, the first resonant frequency ranges from 4.5kHz to 5.5kHz, and the second resonant frequency ranges from 4kHz to 5kHz.

[0103] In some embodiments, the first resonance peak of the first front cavity 1201 can be adjusted by adjusting the volume of the first front cavity 1201. In other words, the first resonance peak of the first front cavity 1201 can be moved to the low frequency band by increasing the volume of the first front cavity 1201. This is because the sound pressure level of the sound produced by the cavity in the frequency band after the resonance frequency will decay rapidly, so the first resonance frequency of the first front cavity 1201 moves to the low frequency band, and then the high-frequency sound waves generated by the first speaker 121 are attenuated, so that the first speaker 121 only outputs the sound of the lower frequency band, and the higher frequency sound waves are played as much as possible by the second speaker 122. With this setting, the ideal sound leakage reduction effect of the earphone in the full frequency band can be achieved.

[0104] In some embodiments, the volume of the first front chamber 1201 can be adjusted to 270 mm 3 -400mm 3 By limiting the volume of the first front cavity 1201, the first resonance frequency of the first front cavity 1201 is moved to the low frequency band, thereby attenuating the high frequency sound waves generated by the first speaker 121, that is, low-pass filtering is achieved by adjusting the volume of the first front cavity 1201. In some embodiments, the volume of the first front cavity 1201 can be 290mm 3 -350mm 3 In some embodiments, the volume of the first front cavity 1201 may be 300 mm 3 or 310mm 3 It can be understood that the design of the volume of the first front cavity 1201 is to attenuate the high-frequency sound waves generated by the first speaker 121, and further, the volume of the first front cavity 1201 can also be adjusted according to the needs of those skilled in the art.

[0105] See also Fig.15 , Fig.15 Schematic diagram of the relationship between the volume of the first front cavity 1201 and the resonant frequency of the first front cavity 1201 in one embodiment of the present application. The volume V1 is 270 mm 3 , volume V2 is 310mm 3 , volume V3 is 350mm 3 , V1, V2, and V3 correspond to a cavity frequency response curve respectively. The volume of the first front cavity 1201 is 270mm 3 Increased to 350mm 3 In the process, that is, from the curve corresponding to volume V1, the curve corresponding to volume V2, and the curve corresponding to volume V3, it can be seen that the first resonance frequency of the first front cavity 1201 decreases from 5.1 kHz to 4.8 kHz. It can be seen that as the volume of the first front cavity 1201 increases, the first resonance frequency of the first front cavity 1201 moves toward a low frequency.

[0106] It is understandable that in order to achieve the first resonance frequency of the first front cavity 1201 to move to the low frequency band, it is not limited to limiting the volume of the first front cavity 1201. Fig. 9 , Fig.10 and Fig.11 The position and shape of the first sound outlet 1101 are designed to achieve the first resonance frequency moving to the low frequency band.

[0107] In some embodiments, the second speaker 122 may have a third resonant frequency. In some embodiments, the third resonant frequency of the second speaker 122 may be no less than 5.5kHz. Furthermore, when used in conjunction with the first speaker 121, the high-frequency sound waves generated by the first speaker 121 can be attenuated, and the second speaker 122 can effectively supplement the high-frequency sound waves, without affecting the overall sound quality of the headset 100. In some embodiments, the third resonant frequency of the second speaker 122 may be no less than 6kHz. In some embodiments, the third resonant frequency of the second speaker 122 may be between 6kHz-10kHz.

[0108] In some embodiments, the difference between the third resonant frequency and the first resonant frequency and the difference between the third resonant frequency and the second resonant frequency are not less than 2000 Hz. When used in conjunction with the first speaker 121, the high-frequency sound waves generated by the first speaker 121 can be attenuated, and the high-frequency sound waves can be effectively supplemented by the second speaker 122, without affecting the overall sound quality of the earphone 100. In some embodiments, the difference between the third resonant frequency and the first resonant frequency and the difference between the third resonant frequency and the second resonant frequency are not less than 2500 Hz.

[0109] See also Figure 7 and Fig.16 , Fig.16 for Figure 7 Schematic diagram of the structure of the speaker assembly 12 in other embodiments. The second speaker 122 may include a second diaphragm 1221 for vibrating and making sounds, a second magnetic circuit system 1222 for driving the second diaphragm 1221 to make sounds, and a speaker housing for carrying and installing the second diaphragm 1221 and the magnetic circuit system 1222. Within the scope of understanding of those skilled in the art, the technical principle that the second magnetic circuit system 1222 drives the second diaphragm 1221 to vibrate and make sounds by cooperating with the second coil and the magnet will not be repeated. The speaker housing is a housing structure that is different from the movement housing 11, so that the second speaker 122 can be flexibly installed on the movement module 10. A portion of the speaker housing can be integrally formed with the movement housing 11, and the other portion includes a support frame to carry the second speaker 122, so that the structure of the movement module 10 is simpler.

[0110] The second speaker 122 is in the movement housing 11 (e.g., the installation space 101) and cooperates with the movement housing 11. The front side of the second diaphragm 1221 of the second speaker 122 cooperates with the speaker housing to form a second front cavity 1203, and the rear side of the second diaphragm 1221 cooperates with the speaker housing to form a second rear cavity 1204. The front side of the second diaphragm 1221 refers to the side of the second diaphragm 1221 away from the second magnetic circuit system 1222, and the rear side of the second diaphragm 1221 refers to the side of the second diaphragm 1221 facing the second magnetic circuit system 1222. When the second speaker is located on the inner wall corresponding to the inner side IS of the movement module 10, the second front cavity 1203 is located on the side of the second speaker 122 facing the inner side IS, and the second rear cavity 1204 is located on the side of the second speaker 122 away from the inner side IS.

[0111] The second front cavity 1203 may be in communication with the second sound outlet 1102, so that the sound waves generated by the second speaker 122 may propagate through the second sound outlet 1102. In some embodiments, the first front cavity 1201 and the second front cavity 1203 may be in communication, so that the first sound outlet 1101 and the second sound outlet 1102 may both be in communication with the first front cavity 1201 / the second front cavity 1203. In other embodiments, the movement housing 11 may also include a structure such as an isolation plate disposed between the second speaker 122 and the first speaker 121 to isolate the cavity coupled to the first speaker 121 and the cavity coupled to the second speaker 122, so that the first sound outlet 1101 is only in communication with the first front cavity 1201, and the second sound outlet 1102 is only in communication with the second front cavity 1203.

[0112] In some embodiments, the second speaker 122 can be installed in the movement housing 11 at a position closer to the free end FE. That is, the length of the second speaker 122 in the direction from the connection end CE to the free end FE is smaller than the length of the first speaker 121 in the direction from the connection end CE to the free end FE. In this way, when the user wears the device (for example, when the free end FE extends into the concha cavity 2002), the second speaker 122 is close to the free end FE, so that the sound output by the second sound outlet 1102 can be better transmitted to the user's ear canal, thereby increasing the listening volume.

[0113] In some embodiments, the second magnetic circuit system 1222 and the first magnetic circuit system 1212 are mutually exclusive so as to enhance the magnetic induction intensity at the first coil in the first speaker 121. The mutually exclusive setting can be understood as that the magnetic pole facing the first magnetic circuit system 1212 is the N pole, and the magnetic pole facing the side of the first magnetic circuit system 1212 facing the second magnetic circuit system 1222 is the N pole, so that the second magnetic circuit system 1222 exerts a force on the first magnetic circuit system 1212 to make the first magnetic circuit system 1212 move away from the second magnetic circuit system 1222, and the first magnetic circuit system 1212 exerts a force on the second magnetic circuit system 1222 to make the second magnetic circuit system 1222 move away from the first magnetic circuit system 1212. For another example, the magnetic pole facing the side of the second magnetic circuit system 1222 facing the first magnetic circuit system 1212 is the S pole, and the magnetic pole facing the side of the first magnetic circuit system 1212 facing the second magnetic circuit system 1222 is the S pole. It can be understood that the second magnetic circuit system 1222 and the first magnetic circuit system 1212 are configured as mutually exclusive settings, which can also increase the magnetic induction intensity at the second coil, which will not be elaborated here.

[0114] Furthermore, due to the increase in the magnetic induction intensity at the first coil / the second coil, the driving force of the first coil to drive the first diaphragm 1211 to vibrate and the second coil to drive the second diaphragm 1221 to vibrate is enhanced, thereby enhancing the sound pressure levels of the sound waves output by the first speaker 121 and the second speaker 122. In some embodiments, the degree of mutual repulsion between the second magnetic circuit system 1222 and the first magnetic circuit system 1212 can be set so that the sound pressure level of the second speaker 122 is increased by at least 1 dB compared to the sound pressure level when the second speaker 122 works alone (for example, the first speaker 121 in the above embodiment is omitted). In some embodiments, the degree of mutual repulsion between the second magnetic circuit system 1222 and the first magnetic circuit system 1212 can be set so that the sound pressure level of the second speaker 122 is increased by at least 2 dB compared to the sound pressure level when the second speaker 122 works alone.

[0115] Similarly, in some embodiments, the degree of mutual repulsion between the second magnetic circuit system 1222 and the first magnetic circuit system 1212 can be set so that the sound pressure level of the first speaker 121 is increased by at least 1 dB compared to the sound pressure level when the first speaker 121 works alone (for example, the second speaker 122 in the above embodiment is omitted). In some embodiments, the degree of mutual repulsion between the second magnetic circuit system 1222 and the first magnetic circuit system 1212 can be set so that the sound pressure level of the first speaker 121 is increased by 2 dB compared to the sound pressure level when the first speaker 121 exists alone.

[0116] The mutually exclusive cooperation of the second magnetic circuit system 1222 and the first magnetic circuit system 1212 can increase the sound pressure level of the first speaker 121 and / or the second speaker 122, and the mutually exclusive cooperation of the second magnetic circuit system 1222 and the first magnetic circuit system 1212 can maintain the sound pressure level of the sound output by the earphone 100, while making the relative distance between the second speaker 122 and the first speaker 121 closer, so that the volume of the earphone 100 can be smaller, making the earphone 100 lighter and smaller, and improving the wearing experience of the user. In some embodiments, the distance between the second speaker 122 and the first speaker 121 can be reduced to 2 mm.

[0117] In some embodiments, the projection of the second magnetic circuit system 1222 along the vibration direction of the second diaphragm 1221 can be at least partially overlapped with the first magnetic circuit system 1212 to ensure the degree of mutual repulsion between the second magnetic circuit system 1222 and the first magnetic circuit system 1212, so that the magnetic induction intensity at the first coil / the second coil is enhanced. In some embodiments, the projection of the first magnetic circuit system 1212 along the vibration direction of the first diaphragm 1211 is at least partially overlapped with the second magnetic circuit system 1222 to ensure the degree of mutual repulsion between the second magnetic circuit system 1222 and the first magnetic circuit system 1212, so that the magnetic induction intensity at the first coil and / or the second coil is enhanced. It can be understood that the magnetic induction intensity at the first coil refers to the average magnetic induction intensity of the first coil as a whole. In some other scenarios, the magnetic induction intensity at the first coil can also refer to the magnetic induction intensity at a special end point or several special end points of the first coil. The magnetic induction intensity at the second coil is similar, and will not be repeated here.

[0118] In some embodiments, see Fig.16 , the first magnetic circuit system 1212 may include a first magnet 1213 for driving the first diaphragm 1211 and a magnetic conductive cover 1214 arranged around the first magnet 1213. The side of the first diaphragm 1211 facing the first magnetic circuit system 1212 is acoustically coupled with other acoustic holes (such as the pressure relief hole 1104) on the movement housing 11 to form a first rear cavity 1202, and the side of the first diaphragm 1211 facing away from the first magnetic circuit system 1212 is acoustically coupled with the first sound outlet hole 1101 to form a first front cavity 1201. The second magnetic circuit system 1222 may include a second magnet 1223 for driving the second diaphragm 1221 to produce sound. The side of the second diaphragm 1221 facing the second magnetic circuit system 1222 is defined as the second rear cavity 1204, and the side of the second diaphragm 1221 facing away from the second magnetic circuit system 1222 is acoustically coupled with the second sound outlet hole 1102 to form a second front cavity 1203.

[0119] The aforementioned first magnetic circuit system 1212 and the second magnetic circuit system 1222 are mutually exclusive, which may mean that the magnetic poles of the second magnet 1223 and the first magnet 1213 are mutually exclusive. Fig.16 , the magnetic pole of the second magnet 1223 facing the first magnet 1213 is the N pole, and the magnetic pole of the first magnet 1213 facing the second magnet 1223 is also the N pole, at this time, the magnetic poles of the first magnet 1213 and the second magnet 1223 are mutually exclusive. Similarly, the magnetic pole of the second magnet 1223 facing the first magnet 1213 is the S pole, and the magnetic pole of the first magnet 1213 facing the second magnet 1223 is the S pole, at this time, the magnetic poles of the first magnet 1213 and the second magnet 1223 are also mutually exclusive.

[0120] In some embodiments, in a first reference plane perpendicular to the vibration direction of the second diaphragm 1221, the second magnet 1223 at least partially overlaps with the first magnet 1213, and the degree of mutual repulsion can be adjusted by adjusting the overlapping portion of the second magnet 1223 and the first magnet 1213, thereby achieving adjustment of the sound pressure level and / or volume of the earphone 100.

[0121] In some embodiments, the second magnetic circuit system 1222 may include a third magnet 1224 that cooperates with the second magnet 1223 to drive the second diaphragm 1221 to produce sound. The second magnet 1223 and the third magnet 1224 cooperate to drive the second diaphragm 1221 to produce sound, thereby enhancing the acoustic performance of the second speaker 122.

[0122] The third magnet 1224 may be disposed around the second magnet 1223 and located on the same side of the second diaphragm 1221 as the second magnet 1223. In some embodiments, along the vibration direction of the second diaphragm 1221, the magnetic pole of the third magnet 1224 facing the second diaphragm 1221 is different from the magnetic pole of the second magnet 1223 facing the second diaphragm 1221, that is, the magnetic poles of the second magnet 1223 and the third magnet 1224 are opposite to each other along the vibration direction of the second diaphragm 1221. For example, the magnetic pole of the third magnet 1224 facing the second diaphragm 1221 is the N pole, the magnetic pole of the third magnet 1224 facing away from the second diaphragm 1221 is the S pole, the magnetic pole of the second magnet 1223 facing the second diaphragm 1221 is the S pole, and the magnetic pole of the second magnet 1223 facing away from the second diaphragm 1221 is the N pole. For another example, the magnetic pole of the third magnet 1224 facing the second diaphragm 1221 is the S pole, the magnetic pole of the third magnet 1224 facing away from the second diaphragm 1221 is the N pole, the magnetic pole of the second magnet 1223 facing the second diaphragm 1221 is the N pole, and the magnetic pole of the second magnet 1223 facing away from the second diaphragm 1221 is the S pole.

[0123] See also Fig.17 and Fig.18 , Fig.17 This is a schematic diagram of the cooperation between the second magnet 1223 , the third magnet 1224 and the first speaker 121 in some embodiments of the present application. Fig.18 for Fig.17 Schematic diagram of the influence of the ratio of the cross-sectional area of ​​the second magnet 1223 perpendicular to the vibration direction of the second diaphragm 1221 and the cross-sectional area of ​​the third magnet 1224 perpendicular to the vibration direction of the second diaphragm 1221 on the magnetic induction intensity at the first coil.

[0124] Fig.17 In (a), the cross-sectional area of ​​the second magnet 1223 perpendicular to the vibration direction of the second diaphragm 1221 is smaller than the cross-sectional area of ​​the third magnet 1224 perpendicular to the vibration direction of the second diaphragm 1221, accounting for about 10% of the cross-sectional area of ​​the third magnet 1224 perpendicular to the vibration direction of the second diaphragm 1221. Fig.17 In (b), the cross-sectional area of ​​the second magnet 1223 perpendicular to the vibration direction of the second diaphragm 1221 is larger than the cross-sectional area of ​​the third magnet 1224 perpendicular to the vibration direction of the second diaphragm 1221, and is approximately 4 times the cross-sectional area of ​​the third magnet 1224 perpendicular to the vibration direction of the second diaphragm 1221. Fig.18 In the figure, the ratio of the cross-sectional area of ​​the second magnet 1223 perpendicular to the vibration direction of the second diaphragm 1221 to the cross-sectional area of ​​the third magnet 1224 perpendicular to the vibration direction of the second diaphragm 1221 is used as the horizontal coordinate, and the magnetic induction intensity at the first coil is used as the vertical coordinate. In the first reference plane perpendicular to the vibration direction of the second diaphragm 1221, it can be seen that in the process of the ratio between the cross-sectional area of ​​the second magnet 1223 and the cross-sectional area of ​​the third magnet 1224 gradually increasing from 0.1 to 4, the magnetic induction intensity at the first coil is also increasing. Furthermore, it can be seen that with the increase in the ratio between the cross-sectional area of ​​the second magnet 1223 and the cross-sectional area of ​​the third magnet 1224, the comprehensive magnetic field of the second speaker 122 (for example, the magnetic field generated by the second magnet 1223 and the magnetic field generated by the third magnet 1224 after coupling) can continuously enhance the magnetic induction intensity at the first coil, thereby improving the sensitivity of the first speaker 121.

[0125] In some embodiments, in order to improve the sensitivity of the first speaker 121 and ensure the acoustic output performance of the second speaker 122, the ratio of the cross-sectional area of ​​the second magnet 1223 perpendicular to the vibration direction of the second diaphragm 1221 to the cross-sectional area of ​​the third magnet 1224 perpendicular to the vibration direction of the second diaphragm 1221 may be between 0.5-4. In some embodiments, in order to improve the sensitivity of the first speaker 121 and ensure the acoustic output performance of the second speaker 122, the ratio of the cross-sectional area of ​​the second magnet 1223 perpendicular to the vibration direction of the second diaphragm 1221 to the cross-sectional area of ​​the third magnet 1224 perpendicular to the vibration direction of the second diaphragm 1221 may be between 1-2.5. In some embodiments, in order to improve the sensitivity of the first speaker 121 and ensure the acoustic output performance of the second speaker 122, the ratio of the cross-sectional area of ​​the second magnet 1223 perpendicular to the vibration direction of the second diaphragm 1221 to the cross-sectional area of ​​the third magnet 1224 perpendicular to the vibration direction of the second diaphragm 1221 may be between 2-3.

[0126] In some embodiments, in a first reference plane perpendicular to the vibration direction of the second diaphragm 1221, the overlapping area between the second magnet 1223 and the first magnetic circuit system 1212, such as the first magnet 1213, is greater than the overlapping area between the third magnet 1224 and the first magnetic circuit system 1212, such as the first magnet 1213. In this way, the area in which the second magnet 1223 affects the first magnetic circuit system 1212, such as the first magnet 1213, can be guaranteed, and the degree of mutual repulsion between the second magnetic circuit system 1222 and the first magnetic circuit system 1212 can be enhanced. In some embodiments, in the first reference plane of the vibration direction of the second diaphragm 1221, the overlapping area between the second magnet 1223 and the first magnetic circuit system 1212, such as the first magnet 1213, is not less than 90% of the area of ​​the second magnet 1223. In some embodiments, in a first reference plane perpendicular to the vibration direction of the second diaphragm 1221 , an overlapping area between the second magnet 1223 and the first magnetic circuit system 1212 , for example, the first magnet 1213 , is 100% of the area of ​​the second magnet 1223 .

[0127] See also Fig.19 , Fig.19 for Fig.17 Schematic diagram of the structure of the second speaker 122 in other embodiments. The second magnetic circuit system 1222 may include a fourth magnet 1225 that cooperates with the second magnet 1223 to drive the second diaphragm 1221 to make sound. The fourth magnet 1225 can cooperate with the second magnet 1223 to drive the second diaphragm 1221 to make sound, thereby enhancing the acoustic performance of the second speaker 122. In some embodiments, the fourth magnet 1225 cooperates with the second magnet 1223 and the third magnet 1224 to drive the second diaphragm 1221 to make sound, thereby enhancing the acoustic performance of the second speaker 122.

[0128] The fourth magnet 1225 may be located on the side of the second diaphragm 1221 away from the second magnet 1223, that is, the fourth magnet 1225 and the second magnet 1223 are respectively located on opposite sides of the second diaphragm 1221. In some embodiments, the magnetic pole of the fourth magnet 1225 facing the second diaphragm 1221 is the same as the magnetic pole of the second magnet 1223 facing the second diaphragm 1221. For example, the magnetic pole of the fourth magnet 1225 facing the second diaphragm 1221 is the N pole, and the magnetic pole of the second magnet 1223 facing the second diaphragm 1221 is the N pole. For another example, the magnetic pole of the fourth magnet 1225 facing the second diaphragm 1221 is the S pole, and the magnetic pole of the second magnet 1223 facing the second diaphragm 1221 is the S pole. With such a configuration, the magnetic induction intensity at the second coil of the second speaker 122 can be further increased to enhance the output sound pressure level of the second speaker 122.

[0129] In some embodiments, the projection of the second speaker 122 along the vibration direction of the second diaphragm 1221 can fall entirely within the first speaker 121. In some embodiments, the projection of the second speaker 122 along the vibration direction of the first diaphragm 1211 can fall entirely within the first speaker 121. In this way, the mutual exclusion between the first magnetic circuit system 1212 and the second magnetic circuit system 1222 can be ensured, while making the internal space of the earphone more compact and improving space utilization.

[0130] See also Fig.13 , in a second reference plane perpendicular to the vibration direction of the first diaphragm 1211, the first magnetic circuit system 1212 has a long axis direction CZ and a short axis direction DZ that are orthogonal to each other, and the dimension of the first magnetic circuit system 1212 along the long axis direction CZ is greater than the dimension of the first magnetic circuit system 1212 along the short axis direction DZ. In some embodiments, the long axis direction CZ may be the length direction Y of the movement housing 11, that is, the direction along the interval between the connecting end CE and the free end FE, and the short axis direction DZ may be the width direction Z of the movement housing 11. In other embodiments, the long axis direction CZ may also be arranged to intersect with the length direction Y of the movement housing 11, and the short axis direction DZ may also be arranged to intersect with the width direction Z of the movement housing 11.

[0131] In some embodiments, the second speaker 122 may be centered relative to the first speaker 121 along the short axis direction DZ. In the second reference plane, the first speaker 121 has a center O1 and the second speaker 122 has a center O2. It can be understood that the centered arrangement may be defined as a distance between the center O1 and the center O2 along the short axis direction DZ being no greater than 10% of the size of the first speaker 121 along the short axis direction DZ. In some embodiments, the distance between the center O1 and the center O2 along the short axis direction DZ is 0.

[0132] See also Fig.13, the axial direction of the second speaker 122 may be parallel to the axial direction of the first speaker 121, that is, the angle between the axial direction of the second speaker 122 and the axial direction of the first speaker 121 may be 0°, and the first speaker 121 and the second speaker 122 have the same relative posture. When the second speaker 122 moves relative to the first speaker 121 along the long axis direction CZ of the first speaker 121, when the overlapping area of ​​the second speaker 122 with the first speaker 121 in the axial direction of the first speaker 121 increases from small to large, the repulsive force between the second magnetic circuit system 1222 and the first magnetic circuit system 1212 may be gradually enhanced, so that the sound pressure level of the sound radiated by the first speaker 121 and / or the second speaker 122 is gradually enhanced.

[0133] See also Fig. 20 and Fig.21 , Fig. 20 for Fig.13 The schematic diagram of the structure of the second speaker 122 when it moves in the long axis direction CZ is shown. Fig.21 for Fig. 20 Schematic diagram of the effect of the second speaker 122 moving in the long axis direction CZ on the magnetic induction intensity at the first coil. Fig.21 The horizontal axis in is the moving distance of the second speaker 122 in the long axis direction CZ, and the vertical axis is the magnetic induction intensity at the first coil. The starting point of the moving process of the second speaker 122 is the position in the axial direction of the first speaker 121 where the projection of the second speaker 122 is closest to the projection of the first speaker 121 and the overlapping area is 0, that is, Fig. 20 The dotted line in the middle indicates the position of the second speaker 122. The end point may be the position where the center O1 of the first speaker 121 and the center O2 of the second speaker 122 coincide with each other, that is, Fig. 20 The solid line indicates the position of the left center O1 of the second speaker 122. Fig.21 It can be seen that when the second speaker 122 moves relative to the first speaker 121 along the long axis direction CZ of the first speaker 121, the magnetic induction intensity at the first coil increases as the moving distance increases. It can be seen that the relative positional relationship between the first speaker 121 and the second speaker 122 along the long axis direction CZ affects the magnetic induction intensity at the first coil of the first speaker 121. When the center O1 of the first speaker 121 and the center O2 of the second speaker 122 gradually approach each other in the long axis direction CZ, the overlapping area of ​​the second speaker 122 with the first speaker 121 in the axial direction of the first speaker 121 increases from small to large, and the repulsive force between the second magnetic circuit system 1222 and the first magnetic circuit system 1212 gradually increases, so that the sensitivity of the first speaker 121 is improved.

[0134] In some embodiments, see Fig.13 , in the long axis direction CZ, the distance between the center O1 of the first speaker 121 and the center O2 of the second speaker 122 does not exceed 5 mm. In this way, the second speaker 122 can enhance the magnetic induction intensity at the first coil of the first speaker 121, thereby improving the output sound pressure level of the first speaker 121. In some embodiments, in the long axis direction CZ, the distance between the center O1 of the first speaker 121 and the center O2 of the second speaker 122 does not exceed 4.5 mm.

[0135] In some embodiments, see Fig.13 , in the long axis direction CZ, the ratio of the distance between the center O1 of the first speaker 121 and the center O2 of the second speaker 122 to the first speaker 121 along the long axis direction CZ is no more than 0.3. In some embodiments, in the long axis direction CZ, the ratio of the distance between the center O1 of the first speaker 121 and the center O2 of the second speaker 122 to the first speaker 121 along the long axis direction CZ is no more than 0.25. In this way, the second speaker 122 can enhance the magnetic induction intensity at the first coil of the first speaker 121, thereby improving the output sound pressure level of the first speaker 121.

[0136] In some embodiments, in the long axis direction CZ, the maximum distance from the center O2 of the second speaker 122 to the outer end surface RS of the free end FE does not exceed 10 mm. Such a configuration enables the second speaker 122 to be closer to the free end FE of the movement housing 11 in the wearing state (for example, in the state where the free end FE extends into the concha cavity 2002), so that the sound output by the second sound outlet 1102 can be better transmitted to the user's ear canal, thereby improving the listening volume. In some embodiments, in the long axis direction CZ, the maximum distance from the center O2 of the second speaker 122 to the outer end surface RS of the free end FE does not exceed 8 mm. It can be understood that when the free end FE is an arc surface, the point on the arc surface that is farthest from the connecting end CE along the length direction Y at the free end FE is located in a section perpendicular to the length direction Y, and the maximum distance from the center O2 to this section does not exceed 8 mm.

[0137] In some embodiments, in the long axis direction CZ, the first magnetic circuit system 1212 has a first reference point C1 closest to the free end FE. The second magnetic circuit system 1222 has a second reference point C2 closest to the free end FE. The second reference point C2 is located on the side of the first reference point C1 away from the free end FE. In some embodiments, the distance M between the first reference point C1 and the second reference point C2 is greater than or equal to 3 mm to ensure the degree of mutual repulsion between the second magnetic circuit system 1222 and the first magnetic circuit system 1212, and to improve the output sound pressure level of the first speaker 121 and the second speaker 122. In some embodiments, in the long axis direction CZ, the maximum distance from the center O2 of the second speaker 122 to the point of the first speaker 121 away from the second speaker 122 is less than or equal to 5 mm.

[0138] In other embodiments of the present specification, the axial direction of the second speaker 122 may also be adjusted so that the angle between the axial direction of the second speaker 122 and the axial direction of the first speaker 121 is greater than 0° and less than 90°. For another example, the angle between the axial direction of the second speaker 122 and the axial direction of the first speaker 121 may be equal to 90°. It can be understood that in the process of adjusting the axial direction of the second speaker 122, the repulsive force between the second magnetic circuit system 1222 and the first magnetic circuit system 1212 is also adjusted.

[0139] See also Figure 6 and Figure 7 , the main control circuit board 13 can be connected to the second shell 112, for example, fixed on the hot melt column connected to the top wall 1121, and can partially overlap with the second side wall 1122 in the thickness direction X, so as to facilitate the arrangement of a sufficiently large first speaker 121 in the core shell 11, thereby enhancing the sound volume produced by the earphone 100, that is, optimizing the arrangement mode and improving the space utilization. In some embodiments, the main control circuit board 13 may not overlap with the second side wall 1122 in the thickness direction X. In some embodiments, the thickness direction of the main control circuit board 13 may be the thickness direction X, and of course it can also be arranged crosswise with the thickness direction X.

[0140] Since the main control circuit board 13 is arranged in the movement shell 11, for example, the main control circuit board 13 is connected to the second shell 112, such as the top wall 1121, the main control circuit board 13 can be electrically connected to other electronic components or external devices through elastic metal parts such as pogo-PIN, metal springs, etc.

[0141] In some embodiments, the main control circuit board 13 is located on a side of the first speaker 121 close to the second housing 112. In some embodiments, the main control circuit board 13 can be stacked with the first speaker 121 in the thickness direction of the main control circuit board 13 or in the axial direction of the first speaker 121. In some embodiments, along the axial direction of the first speaker 121, the main control circuit board 13 can overlap with a portion of the first speaker 121 close to the connection end CE to optimize the arrangement and improve space utilization.

[0142] See also Fig.14 The main control circuit board 13 can be electrically connected to the terminals such as the first terminal 1301 and the second terminal 1302, and other terminals, respectively, to achieve control of the speaker assembly 12. In some embodiments, the terminals such as the first terminal 1301 and the second terminal 1302, and other terminals, etc. can be located on the main control circuit board 13.

[0143] The main control circuit board 13 may be provided with a driving circuit 131 to realize the speaker assembly 12, such as the first speaker 121 and the second speaker 122. Further, the driving circuit 131 may be mainly composed of a digital-to-analog conversion circuit 1311, and of course may also include a power amplifier circuit, a processor, etc. Specifically, the driving circuit 131 may be formed by at least using a digital-to-analog conversion circuit 1311 and other circuits according to the prior art in the art, and no further description is given.

[0144] The driving circuit 131 can be electrically connected to terminals such as the first terminal 1301 and the second terminal 1302, other terminals, etc., to achieve electrical connection with the speaker assembly 12 such as the first speaker 121 and the second speaker 122 to drive the speaker assembly 12 such as the first speaker 121 and the second speaker 122.

[0145] In some embodiments, the driving circuit 131 can realize the driving of the first speaker 121 and the second speaker 122 at the same time through a digital-to-analog conversion circuit 1311, so as to simplify the circuit setting and reduce the cost. That is, the driving circuit 131 can be configured to drive the first speaker 121 and the second speaker 122 at the same time through the same digital-to-analog conversion circuit 1311. Furthermore, when the first speaker 121 and the second speaker 122 cooperate, the high-frequency sound waves generated by the first speaker 121 can be attenuated by the first resonant frequency of the first front cavity 1201, and the high-frequency sound waves can be effectively supplemented by the second speaker 122 without affecting the overall sound quality.

[0146] It is understandable that the earphone 100 may also include electronic components such as batteries, sensors, antennas, etc. to ensure the normal operation of the earphone 100, and such electronic components can be arranged in the movement module 10 and / or the ear hook 20 as needed, which will not be elaborated herein.

[0147] In the several embodiments provided in this application, it should be understood that the disclosed methods and devices can be implemented in other ways. For example, the device implementation described above is only illustrative, for example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0148] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0149] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0150] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure 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: The earphone comprises a core housing, an ear hook, and a first speaker and a second speaker carried by the core housing, wherein the frequency band of the sound output by the first speaker is at least partially lower than the frequency band of the sound output by the second speaker, and the core housing is provided with a first sound outlet hole and a second sound outlet hole, wherein the first speaker is configured to output the sound through the first sound outlet hole, and the second speaker is configured to output the sound through the second sound outlet hole, and the core housing has a connection end connected to the ear hook and a free end away from the connection end, The first sound outlet hole is arranged around the circumference of the second sound outlet hole, and is partially located on a side of the second sound outlet hole close to the free end.

2. The earphone according to claim 1, characterized in that The movement housing has an inner side facing the ear when worn, the second sound outlet is arranged on the inner side, and the free end at least partially extends into or covers the concha cavity of the ear.

3. The earphone according to claim 1 or 2, characterized in that: The movement shell further has a length direction, a width direction and a thickness direction that are orthogonal to each other, the length direction is defined as the direction from the connecting end to the free end, the thickness direction is defined as the direction of the movement shell toward or away from the ear when worn, the first sound hole and the second sound hole are toward the ear in the thickness direction, and on a plane perpendicular to the thickness direction, the shortest distance between the edge of the hole of the orthographic projection of the second sound hole and the edge of the hole of the orthographic projection of the first sound hole is not less than 2 mm.

4. The earphone according to claim 3, characterized in that: The movement shell has an inner side surface facing the ear when worn, and a protrusion is arranged on the inner side surface. The protrusion protrudes toward a side away from the interior of the movement shell compared to the peripheral area of ​​the protrusion, and a recessed area is arranged inside the movement shell corresponding to the protrusion. The second sound outlet is arranged on the protrusion and communicated with the space in the recessed area. The second speaker is embedded in the recessed area, and the first sound outlet is arranged around the periphery of the protrusion.

5. The earphone according to claim 3, characterized in that: The movement shell has an inner side surface facing the ear when worn, and has an upper side surface close to the top of the user's head and a lower side surface away from the top of the head along the width direction when worn, the upper side surface and the lower side surface are respectively connected to the inner side surface, and the movement shell has an outer end surface connecting the upper side surface, the lower side surface and the inner side surface at the free end, the first sound outlet hole includes a first hole section located on the side of the second sound outlet hole close to the lower side surface and a second hole section located on the side of the second sound outlet hole close to the outer end surface, and the first speaker outputs sound through the first hole section and the second hole section respectively.

6. The earphone according to claim 5, characterized in that The first speaker has a first diaphragm, and the first speaker cooperates with the movement shell to form a first front cavity and a first rear cavity located on both sides of the first diaphragm. The first sound outlet is connected to the first front cavity, and the movement shell is provided with a pressure relief hole for connecting to the first rear cavity. The pressure relief hole is arranged on the lower side surface, and the width of the first sound outlet is arranged to widen in the direction from the first hole segment to the second hole segment.

7. The earphone according to claim 6, characterized in that The first hole segment is arranged on the connecting surface between the lower side surface and the inner side surface, and / or the second hole segment is arranged on the connecting surface between the outer end surface and the inner side surface.

8. The earphone according to claim 5, characterized in that The first hole segment and the second hole segment are arranged on the inner side surface, the first sound outlet hole further comprises a third hole segment located on a side of the second sound outlet hole close to the upper side surface, and the second hole segment connects the first hole segment and the third hole segment.

9. The earphone according to claim 6, characterized in that Along the length direction, the second speaker is arranged close to the free end, and the earphone further comprises a driving circuit for driving the first speaker and the second speaker; Wherein, the driving circuit further drives the first diaphragm to vibrate at the resonance frequency of the second speaker; and / or The driving circuit is configured to simultaneously drive the first speaker and the second speaker through the same digital-to-analog conversion circuit.

10. The earphone according to claim 5, characterized in that The positive direction of the central axis of the second sound outlet hole is arranged to be inclined close to one side of the lower side surface, and the positive direction of the central axis of the second sound outlet hole is the direction along the central axis of the second sound outlet hole pointing to the outside of the movement housing.

11. The earphone according to claim 10, characterized in that The angle between the positive direction of the central axis of the second sound outlet hole and the positive direction of the width direction is between 75° and 80°, and the positive direction of the width direction is a direction pointing from the upper side surface to the lower side surface along the width direction.

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