WO2024088246A1 - 一种耳机 - Google Patents

一种耳机 Download PDF

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Publication number
WO2024088246A1
WO2024088246A1 PCT/CN2023/126157 CN2023126157W WO2024088246A1 WO 2024088246 A1 WO2024088246 A1 WO 2024088246A1 CN 2023126157 W CN2023126157 W CN 2023126157W WO 2024088246 A1 WO2024088246 A1 WO 2024088246A1
Authority
WO
WIPO (PCT)
Prior art keywords
sound
emitting part
projection
point
earphone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2023/126157
Other languages
English (en)
French (fr)
Inventor
徐江
张浩锋
郑泽英
张磊
顾善勇
赵洪强
童珮耕
解国林
李永坚
招涛
武多多
戢澳
齐心
王力维
王真
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Shokz Co Ltd
Original Assignee
Shenzhen Shokz Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from PCT/CN2023/079401 external-priority patent/WO2024087439A1/zh
Application filed by Shenzhen Shokz Co Ltd filed Critical Shenzhen Shokz Co Ltd
Priority to CN202380016770.2A priority Critical patent/CN118541990B/zh
Priority to US18/625,183 priority patent/US12212916B2/en
Publication of WO2024088246A1 publication Critical patent/WO2024088246A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1016—Earpieces of the intra-aural type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/105—Earpiece supports, e.g. ear hooks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
    • H04R2201/105—Manufacture of mono- or stereophonic headphone components

Definitions

  • the present application relates to the field of acoustic technology, and in particular to a headset.
  • acoustic devices such as headphones
  • headphones can be used in conjunction with electronic devices such as mobile phones and computers to provide users with an auditory feast.
  • Headphones are portable audio output devices that achieve sound conduction within a specific range.
  • headphones do not block or cover the ear canal, allowing users to obtain sound information from the external environment while listening to music, thereby improving safety and comfort.
  • the output performance of headphones has a great impact on the user's comfort.
  • An embodiment of the present application provides an earphone, which includes: a sound-emitting part, including a transducer and a shell for accommodating the transducer; an ear hook, the ear hook including a first part and a second part; in a worn state, the first part is hung between the auricle and the head of the user, the second part extends to the side of the auricle away from the head and connects to the sound-emitting part, and the sound-emitting part is worn near the ear canal but does not block the ear canal opening; wherein the ear hook and the sound-emitting part form a first projection on the sagittal plane of the user, the first projection includes an outer contour, a first end contour, an inner contour and a second end contour, and in a non-worn state, the inner contour, the first end contour, the second end contour and a tangent segment connecting the first end contour and the second end contour jointly define a first closed curve, and the first area range of the first closed curve is 300
  • At least a portion of the shell is inserted into the concha cavity.
  • the distance between the extreme point and the projection point of the apex of the ear hook on the sagittal plane of the user is 6 mm-15 mm.
  • the portion of the inner contour corresponding to the ear hook includes the leftmost end and the rightmost end, and the leftmost end and the rightmost end are respectively the two endpoints of the first curve, and in a non-wearing state, in the long-axis direction of the projection of the sound-emitting part, the distance between the leftmost end and the rightmost end is 25mm-35mm.
  • the portion of the inner contour corresponding to the ear hook includes the leftmost end, and in a non-worn state, in the first direction, the distance between the extreme point and the leftmost end is 20mm-25mm.
  • the portion of the inner contour corresponding to the ear hook includes the leftmost end, and in a non-worn state, in the first direction, the distance between the projection point of the upper vertex on the sagittal plane and the leftmost end is 17mm-22mm.
  • the distance between the projection point of the center of mass of the headset on the sagittal plane and the extreme point is 20 mm-35 mm.
  • a distance between the extreme point and a projection point of the center of mass of the sound-emitting part on the sagittal plane ranges from 20 mm to 30 mm.
  • the distance between the projection point of the apex of the ear hook on the sagittal plane and the projection point of the center of mass of the headset on the sagittal plane is 22 mm-35 mm.
  • a distance between a projection point of the apex of the ear hook on the sagittal plane and a projection point of the center of mass of the sound-emitting part on the sagittal plane is 18 mm-28 mm.
  • the tangent segment is tangent to the first end contour at a first tangent point, and is tangent to the second end contour at a second tangent point.
  • an area of a triangle formed by the first tangent point, the second tangent point and the extreme point is between 150 mm 2 and 190 mm 2 .
  • a distance between a projection point of the center of mass of the sound-emitting part on the sagittal plane and a projection point of the center of mass of the ear hook on the sagittal plane is 20 mm-35 mm.
  • the embodiment of the present application also provides an earphone, which includes: a sound-emitting part, including a transducer and a shell for accommodating the transducer; an ear hook, the ear hook including a first part and a second part; in a worn state, the first part is hung between the auricle and the head of the user, the second part extends to the side of the auricle away from the head and connects to the sound-emitting part, and the sound-emitting part is worn near the ear canal but does not block the ear canal opening; wherein the ear hook and the sound-emitting part form a second projection on the sagittal plane of the user, the second projection includes an outer contour, a first end contour, an inner contour and a second end contour, and in a non-worn state, the inner contour, the first end contour, the second end contour and the tangent segment connecting the first end contour and the second end contour jointly define a second closed curve, and the second area range of the second closed curve is 50
  • At least a portion of the shell covers the anti-helix area.
  • the portion of the inner contour corresponding to the ear hook includes the leftmost end and the rightmost end, the leftmost end and the rightmost end are respectively the two endpoints of the first curve, and in the long-axis direction of the projection of the sound-emitting part, the distance between the leftmost end and the rightmost end is 25mm-35mm.
  • the portion of the inner contour corresponding to the ear hook includes the leftmost end, and in a non-worn state, in the first direction, the distance between the extreme point and the leftmost end is 15mm-20mm.
  • the portion of the inner contour corresponding to the ear hook includes the leftmost end, and in a non-worn state, in the first direction, the distance between the projection point of the upper vertex on the sagittal plane and the leftmost end is 12mm-17mm.
  • the distance between the projection point of the center of mass of the headset on the sagittal plane and the extreme point is 15 mm-30 mm.
  • a distance between the extreme point and a projection point of the center of mass of the sound-emitting part on the sagittal plane ranges from 15 mm to 25 mm.
  • the distance between the projection point of the apex of the ear hook on the sagittal plane and the projection point of the center of mass of the headset on the sagittal plane is 17 mm-30 mm.
  • a distance between a projection point of the apex of the ear hook on the sagittal plane and a projection point of the center of mass of the sound-emitting part on the sagittal plane is 10 mm-20 mm.
  • the tangent segment is tangent to the first end contour at a first tangent point, and is tangent to the second end contour at a second tangent point.
  • an area of a triangle formed by the first tangent point, the second tangent point and the extreme point is between 150 mm 2 and 190 mm 2 .
  • a distance between a projection point of the center of mass of the sound-emitting part on the sagittal plane and a projection point of the center of mass of the ear hook on the sagittal plane is 25 mm-40 mm.
  • FIG1 is a schematic diagram of an exemplary auricle according to some embodiments of the present specification.
  • FIG2 is an exemplary wearing diagram of an earphone according to some embodiments of this specification.
  • FIG3 is an exemplary structural diagram of an earphone according to some embodiments of this specification.
  • FIG4 is a schematic diagram of an acoustic model formed by headphones according to some embodiments of this specification.
  • FIG5 is a schematic diagram of the structure of an earphone in a non-wearing state according to some embodiments of this specification.
  • FIG6 is a first projection formed by projecting the earphone in a non-wearing state on a first plane according to some embodiments of the present specification
  • FIG7 is an exemplary schematic diagram of a first curve of a projection of an earphone on a sagittal plane of a user according to some embodiments of this specification;
  • FIGS. 8A and 8B are schematic diagrams of exemplary position structures of the center of mass of an earphone according to some embodiments of this specification;
  • FIG9 is a schematic diagram of the centroid of an ear hook of an earphone according to other embodiments of the present specification.
  • FIG10 is a schematic diagram of a tangent segment of a first projection of an earphone according to some embodiments of the present specification
  • FIG. 11 is a diagram of a triangle formed by the centroid of the ear hook, battery compartment, and sound-emitting part of the earphone according to some embodiments of this specification. Schematic diagram of the shape;
  • FIG12 is an exemplary wearing diagram of an earphone according to yet other embodiments of the present specification.
  • FIG13 is a schematic diagram of an acoustic model formed by headphones according to some other embodiments of this specification.
  • FIG14 is a projection diagram of the earphone in a non-wearing state on a first plane according to some embodiments of this specification.
  • FIG. 15 is a schematic diagram of a tangent segment of a second projection of an earphone according to some embodiments of the present specification.
  • system means for distinguishing different components, elements, parts, portions or assemblies at different levels.
  • device means for distinguishing different components, elements, parts, portions or assemblies at different levels.
  • unit means for distinguishing different components, elements, parts, portions or assemblies at different levels.
  • the words can be replaced by other expressions.
  • connection can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium, it can refer to the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined.
  • connection can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium, it can refer to the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined.
  • FIG. 1 is a schematic diagram of an exemplary auricle shown in some embodiments of the present application.
  • the auricle 100 may include an ear canal 101, a concha cavity 102, a concha cylindrica 103, a triangular fossa 104, an antihelix 105, a scaphoid 106, an auricle 107, an earlobe 108, a crus 109, an outer contour 1013, and an inner contour 1014.
  • the antihelix crus 1011, the antihelix crus 1012, and the antihelix 105 are collectively referred to as the antihelix region in the embodiments of this specification.
  • the wearing and stability of the acoustic device can be achieved with the help of one or more parts of the auricle 100.
  • the ear canal 101, the concha cavity 102, the concha cylindrica 103, the triangular fossa 104 and other parts have a certain depth and volume in three-dimensional space, which can be used to achieve the wearing requirements of the acoustic device.
  • an acoustic device e.g., an in-ear headset
  • the acoustic device can be worn with the help of other parts of the auricle 100 except the ear canal 101.
  • the acoustic device can be worn with the help of the cymba concha 103, the triangular fossa 104, the antihelix 105, the sphenoid 106, the helix 107 and other parts or their combination.
  • it in order to improve the comfort and reliability of the acoustic device in wearing, it can also be further used with the user's earlobe 108 and other parts.
  • the user's ear canal 101 can be "liberated" and the impact of the acoustic device on the user's ear health can be reduced.
  • the acoustic device When the user wears the acoustic device on the road, the acoustic device will not block the user's ear canal 101, and the user can receive both the sound from the acoustic device and the sound from the environment (for example, horn sounds, car bells, surrounding human voices, traffic control sounds, etc.), thereby reducing the probability of traffic accidents.
  • the whole or part of the structure of the acoustic device can be located in front of the crus helix 109 (for example, the area J surrounded by the dotted line in FIG1 ).
  • the whole or part of the structure of the acoustic device can be in contact with the upper part of the ear canal 101 (for example, the location of one or more parts such as the crus helix 109, the cymba concha 103, the triangular fossa 104, the antihelix 105, the scaphoid 106, the helix 107, etc.).
  • the whole or part of the structure of the acoustic device can be located in one or more parts of the auricle (for example, the cavum concha 102, the cymba concha 103, the triangular fossa 104, etc.) (for example, the area M1 surrounded by the dotted line in FIG1 that includes at least the cymba concha 103 and the triangular fossa 104 and the area M2 that includes at least the cavum concha 102).
  • the auricle for example, the cavum concha 102, the cymba concha 103, the triangular fossa 104, etc.
  • auricle model with a "standard" shape and size as a reference to further describe how the acoustic device in different embodiments is worn on the auricle model.
  • a simulator containing a head and its (left and right) auricles 100 made based on ANSI: S3.36, S3.25 and IEC: 60318-7 standards can be used, for example GRAS45BCKEMAR, as a reference for wearing an acoustic device, presents the scenario of most users wearing the acoustic device normally.
  • the auricle 100 used as a reference may have the following relevant characteristics: the size of the projection of the auricle on the sagittal plane in the vertical axis direction may be in the range of 49.5-74.3 mm, and the size of the projection of the auricle on the sagittal plane in the sagittal axis direction may be in the range of 36.6-55 mm. Therefore, in the present application, descriptions such as "user wears", “in a wearing state” and “in a wearing state” may refer to the auricle 100 of the acoustic device described in the present application worn on the aforementioned simulator. Of course, considering the individual differences of different users, the structure, shape, size, thickness, etc.
  • auricle 100 may be differentially designed according to auricles 100 of different shapes and sizes, and these differentiated designs may be manifested as characteristic parameters of one or more parts of the acoustic device (for example, the sounding part, ear hook, etc. hereinafter) may have different ranges of values, so as to adapt to different auricles 100.
  • characteristic parameters of one or more parts of the acoustic device for example, the sounding part, ear hook, etc. hereinafter
  • non-wearing state is not limited to the state where the earphone is not worn on the user's auricle 100, but also includes the state where the earphone is not deformed by external force; the “wearing state” is not limited to the state where the earphone is worn on the user's auricle 100, and the suspension structure (for example, ear hook) and the sound-emitting part are spread out to a corresponding distance can also be regarded as a wearing state.
  • the sagittal plane refers to a plane perpendicular to the ground along the front-back direction of the body, which divides the human body 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 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 into upper and lower parts.
  • 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
  • the vertical axis refers to an axis along the up-down direction of the body and perpendicular to the horizontal plane.
  • the "front side of the auricle" described in the present application is a concept relative to the "back side of the auricle", the former refers to the side of the auricle away from the head, and the latter refers to the side of the auricle facing the head, both of which are for the user's auricle.
  • a schematic diagram of the front side contour of the auricle can be obtained as shown in Figure 1.
  • auricle 100 is for illustrative purposes only and is not intended to limit the scope of the present application.
  • a person skilled in the art can make various changes and modifications based on the description of the present application.
  • a part of the structure of the acoustic device can cover part or all of the ear canal 101. These changes and modifications are still within the scope of protection of the present application.
  • FIG. 2 is a schematic diagram of an exemplary wearing method of an earphone according to some embodiments of the present specification.
  • the earphone 10 may include but is not limited to air conduction earphones and bone air conduction earphones, etc. In some embodiments, the earphone 10 may be combined with glasses, headphones, head-mounted display devices, AR/VR helmets, and other products.
  • the earphone 10 may include a sound-emitting portion 11 and an ear hook 12.
  • the earphone 10 may be worn on the user's body (e.g., the head, neck, or upper torso of the human body) by means of the ear hook 12.
  • the earphone 10 may be fixed to a position near the ear canal but not blocking the ear canal by means of the ear hook 12 so that the user's auricle 100 remains open, and the user can hear the sound output by the earphone 10 while obtaining the sound of the external environment.
  • the earphone 10 may be arranged around or partially around the periphery of the user's auricle 100, and sound may be transmitted by air conduction or bone conduction.
  • the ear hook 12 includes a first portion 121 and a second portion 122, which are connected in sequence.
  • the first portion 121 of the ear hook 12 is hung between the auricle and the head of the user, and the second portion 122 extends to the side of the auricle away from the head and connects to the sound-emitting part 11, so that the sound-emitting part 11 is worn near the ear canal but does not block the ear canal.
  • the earphone 10 may adopt any one of the following methods or a combination thereof.
  • at least a portion of the ear hook 12 is configured as a contoured structure that fits at least one of the back side of the auricle 100 and the head, so as to increase the contact area between the ear hook 12 and the auricle 100 and/or the head, thereby increasing the resistance of the earphone 10 to falling off from the auricle 100.
  • At least a portion of the ear hook 12 is configured as an elastic structure so that it has a certain amount of deformation when being worn, so as to increase the positive pressure of the ear hook 12 on the auricle 100 and/or the head, thereby increasing the resistance of the earphone 10 to falling off from the auricle 100.
  • at least a portion of the ear hook 12 is configured to abut against the head when being worn, so as to form a reaction force that presses the auricle 100, so that the sound-generating part 11 is pressed against the front side of the auricle 100, thereby increasing the resistance of the earphone 10 to falling off from the auricle 100.
  • the sound-emitting part 11 and the ear hook 12 are configured to clamp the area where the antihelix 105 is located and the area where the cavum concha is located from the front and back sides of the auricle 100 when the earphone is worn, thereby increasing the resistance of the earphone 10 falling off the auricle 100.
  • the sound-emitting part 11 or the auxiliary structure connected thereto is configured to at least partially extend into the cavities such as the cavum concha 102, the cymba concha 103, the triangular fossa 104 and the scaphoid 106, thereby increasing the resistance of the earphone 10 falling off the auricle 100.
  • the ear hook 12 may have an arc-shaped structure that matches the junction between the user's head and the auricle 100, so that the ear hook 12 can be hung between the user's auricle 100 and the head.
  • the first part 121 of the earphone 10 connects the second part 122 and the sound-emitting part 11, so that the earphone 10 is curved in three-dimensional space when it is not worn (that is, in a natural state).
  • the second part 122, the first part 121, and the sound-emitting part 11 are not coplanar. This arrangement allows the earphone 10 to be placed in a curved shape when it is not worn (that is, in a natural state).
  • the second part 122 When in the wearing state, the second part 122 can be hung between the back side of the auricle 100 of the user and the head, the sound-emitting part 11 contacts the front side of the auricle 100 of the user (for example, the area M3 in FIG. 1 ) or the auricle 100 (for example, the area M1 and the area M2 in FIG. 1 ), and the sound-emitting part 11 and the second part 122 can cooperate to clamp the auricle 100.
  • the first part 121 can extend from the head to the outside of the head, and then cooperate with the second part 122 to provide the sound-emitting part 11 with a pressing force on the front side of the auricle 100 or the auricle 100.
  • the sound-emitting part 11 can be pressed against the front side of the auricle 100 or the area where the concha 102, the cymba concha 103, the triangular fossa 104, the antihelix 105 and other parts are located, so that the ear canal 101 of the auricle 100 is not blocked when the earphone 10 is in the wearing state.
  • the sound-emitting part 11 includes a housing 111 and a transducer disposed in the housing 111 .
  • the housing 111 is connected to the ear hook 12 and is used to carry the transducer.
  • the housing 111 may be a closed housing structure with a hollow interior, and the transducer is located inside the housing 111.
  • the earphone 10 may be combined with products such as glasses, headphones, head-mounted display devices, AR/VR helmets, etc.
  • the housing 111 may be fixed near the user's auricle 100 by hanging or clamping.
  • a hanging structure e.g., a hook
  • the shape of the hook matches the shape of the auricle, and the earphone 10 can be worn independently on the user's auricle 100 by the hook.
  • the housing 111 may be a housing structure having a shape that matches the human auricle 100, for example, a circular ring, an ellipse, a racetrack, a polygon (regular or irregular), a U-shape, a V-shape, a semicircle, or other regular or irregular shapes, so that the housing 111 can be directly hung on the user's auricle 100.
  • the housing 111 may also include a fixing structure.
  • the fixing structure may include an ear hook, an elastic band, etc., so that the earphone 10 can be better worn on the user to prevent the user from falling off during use.
  • the sound-emitting part 11 when the user wears the earphone 10, the sound-emitting part 11 may be located above, below, in front of the user's auricle 100 (for example, the area J in front of the tragus shown in FIG. 1 ) or inside the auricle (for example, the area M 2 where the cavum concha is located).
  • the sound-emitting part 11 may also be provided with two or more acoustic holes (for example, a sound outlet hole and a pressure relief hole) for transmitting sound.
  • the transducer in the sound-emitting part 11 may output sounds with a phase difference (for example, opposite phases) through two or more acoustic holes.
  • the transducer is used to convert an excitation signal (such as an electrical signal) into a corresponding mechanical vibration to generate sound.
  • the transducer may include a diaphragm. When the diaphragm vibrates, the sound may be emitted from the front and rear sides of the diaphragm, respectively.
  • a front cavity (not shown) for transmitting sound is provided at the front side of the diaphragm in the housing 111.
  • the front cavity is acoustically coupled with an acoustic hole (such as a sound outlet hole), and the sound of the front side of the diaphragm can be emitted from the sound outlet hole through the front cavity.
  • a rear cavity (not shown) for transmitting sound is provided at the rear side of the diaphragm in the housing 111.
  • the rear cavity is acoustically coupled with another acoustic hole (such as a pressure relief hole), and the sound of the rear side of the diaphragm can be emitted from the pressure relief hole through the rear cavity.
  • the movement may include a movement housing 111 (not shown), and the movement housing 111 and the diaphragm of the transducer limit the formation of the front cavity and the rear cavity of the transducer. It should be noted that when the diaphragm is vibrating, the front and rear sides of the diaphragm can simultaneously generate a group of sounds with a phase difference (for example, opposite phases).
  • the structure of the front cavity and the rear cavity can be set so that the sound output by the transducer at the sound outlet hole and the pressure relief hole meets specific conditions.
  • the length of the front cavity and the rear cavity can be designed so that a group of sounds with a specific phase relationship (for example, opposite phases) can be output at the sound outlet hole and the pressure relief hole.
  • the sound-emitting part 11 may have a long axis direction X, a short axis direction Y and a thickness direction Z that are orthogonal to each other.
  • the long axis direction X can be defined as the direction with a larger extension dimension in the shape of the two-dimensional projection surface of the sound-emitting part 11 (for example, the projection of the sound-emitting part 11 on the plane where its inner side (the side close to the auricle 100) is located, or the projection on the sagittal plane) (for example, when the projection shape is a rectangle or an approximate rectangle, the long axis direction is the length direction of the rectangle or the approximate rectangle).
  • the short axis direction Y can be defined as the direction perpendicular to the long axis direction X in the shape of the projection of the sound-emitting part 11 on the sagittal plane (for example, when the projection shape is a rectangle or an approximate rectangle, the short axis direction is the width direction of the rectangle or the approximate rectangle).
  • the thickness direction Z can be defined as a direction perpendicular to the sagittal plane, for example, consistent with the direction of the coronal axis, both pointing to the left and right directions of the body.
  • the sound-emitting part 11 when the user wears the earphone 10, the sound-emitting part 11 can be fixed near the user's ear canal 101 but not blocking the ear canal.
  • the projection of the earphone 10 on the sagittal plane may not cover the user's ear canal.
  • the projection of the sound-emitting part 11 on the sagittal plane may fall on the left and right sides of the head and on the sagittal axis of the human body at a position in front of the tragus (such as the position shown in the solid line frame A in Figure 2).
  • the sound-emitting part 11 is located in front of the user's tragus, the long axis of the sound-emitting part 11 can be in a vertical or approximately vertical state, the projection of the short axis direction Y on the sagittal plane is consistent with the direction of the sagittal axis, the projection of the long axis direction X on the sagittal plane is consistent with the vertical axis direction, and the thickness direction Z is perpendicular to the sagittal plane.
  • the projection of the sound-emitting part 11 on the sagittal plane can fall on the antihelix 105 (such as the position shown in the dotted line frame C in Figure 2).
  • the sound-producing part 11 is at least partially located at the antihelix 105, the long axis of the sound-producing part 11 is in a horizontal or approximately horizontal state, and the long axis direction X of the sound-producing part 11 is in the sagittal plane.
  • the projection of the short axis direction Y on the sagittal plane is consistent with the direction of the vertical axis, the projection of the short axis direction Y on the sagittal plane is consistent with the direction of the vertical axis, and the thickness direction Z is perpendicular to the sagittal plane.
  • the sound-emitting part 11 can be prevented from blocking the ear canal, thereby freeing the user's ears; the contact area between the sound-emitting part 11 and the auricle 100 can also be increased, thereby improving the wearing comfort of the earphone 10.
  • the projection of the earphone 10 on the sagittal plane may also cover or at least partially cover the ear canal of the user, for example, the projection of the sound-emitting part 11 on the sagittal plane may fall within the concha cavity 102.
  • the sound-emitting part 11 is at least partially located within the concha cavity 102, and the sound-emitting part 11 is in an inclined state (e.g., the position shown in the dotted box B in FIG. 2 ).
  • the long axis direction X and the short axis direction Y are still parallel or approximately parallel to the sagittal plane, and the projection of the short axis direction Y of the sound-emitting part 11 on the sagittal plane may have a certain angle with the direction of the sagittal axis, that is, the short axis direction Y is also tilted accordingly, and the projection of the long axis direction X on the sagittal plane may have a certain angle with the direction of the sagittal axis, that is, the long axis direction X is also tilted, and the thickness direction Z is perpendicular to the sagittal plane.
  • the concha cavity 102 has a certain volume and depth, there is a certain distance between the inner side of the earphone 10 and the concha cavity, and the ear canal can be connected to the outside world through the leakage structure between the inner side and the concha cavity, thereby freeing the user's ears.
  • the sound-emitting portion 11 and the concha cavity can cooperate to form an auxiliary cavity (i.e., the cavity structure mentioned later) that is connected to the ear canal.
  • the sound outlet hole can be at least partially located in the auxiliary cavity, and the sound output from the sound outlet hole will be restricted by the auxiliary cavity, that is, the auxiliary cavity can gather the sound so that the sound can be more transmitted into the ear canal, thereby increasing the volume and quality of the sound heard by the user in the near field, thereby improving the acoustic effect of the earphone 10.
  • the wearing position of the sound-emitting part 11 is not limited to the positions A, B, C, etc. shown in FIG. 2 , and it only needs to satisfy the area J, area M1 , or area M2 shown in FIG. 1 .
  • the whole or part of the structure of the sound-emitting part 11 can be located in front of the crus helix 109 (for example, the area J surrounded by the dotted line in FIG. 1 ).
  • the whole or part of the structure of the sound-emitting part 11 can be in contact with the upper part of the ear canal 101 (for example, the position where one or more parts of the crus helix 109, the cymba concha 103, the triangular fossa 104, the antihelix 105, the scaphoid 106, the helix 107, etc. are located).
  • the whole or part of the structure of the sound-emitting part 11 can be located in a cavity formed by one or more parts of the auricle 100 (for example, the cavum concha 102, the cymba concha 103, the triangular fossa 104, etc.) (for example, the area M1 surrounded by the dotted line in FIG. 1 that at least includes the cymba concha 103 and the triangular fossa 104 and the area M2 that at least includes the cavum concha 102).
  • the auricle 100 for example, the cavum concha 102, the cymba concha 103, the triangular fossa 104, etc.
  • the description of the above-mentioned earphone 10 is for the purpose of illustration only and is not intended to limit the scope of the present application.
  • the earphone 10 may also include a battery assembly, a Bluetooth assembly, etc. or a combination thereof.
  • the battery assembly can be used to power the earphone 10.
  • the Bluetooth assembly can be used to wirelessly connect the earphone 10 to other devices (e.g., a mobile phone, a computer, etc.).
  • Fig. 3 is an exemplary structural diagram of an earphone according to some embodiments of the present specification. Please combine Fig. 2 with Fig. 3, Fig. 2 shows the left ear side, and Fig. 3 shows the right ear side.
  • the ear hook 12 is an arc-shaped structure that fits the junction between the user's head and the auricle 100.
  • the sound-emitting part 11 (or the shell 111 of the sound-emitting part 11) may have a connection end CE connected to the ear hook 12 and a free end FE not connected to the ear hook 12.
  • the first part 121 of the ear hook 12 is hung between the user's auricle 100 and the head, and the second part 122 of the ear hook 12 extends to the side of the auricle 100 away from the head and is connected to the connection end CE of the sound-emitting part 11, so that the sound-emitting part 11 is at least partially inserted into the concha cavity 102, for example, the free end FE of the sound-emitting part 11 can extend into the concha cavity 102.
  • the projection of the shell of the sound-emitting part 11 on the sagittal plane and the projection of the concha cavity 102 on the sagittal plane have an overlapping part, for example, the projection of the sound-emitting part 11 on the sagittal plane can fall in the concha cavity 102.
  • the projection of the earphone 10 on the sagittal plane can also cover or at least partially cover the user's ear canal.
  • the sound-emitting part 11 is located in the M2 area above the concha cavity 102 and the ear canal 101 (shown in Figure 1), and the long axis direction X of the sound-emitting part 11 is tilted (as shown in position B in Figure 2).
  • the long axis direction X and the short axis direction Y of the sound-emitting part 11 are still parallel or approximately parallel to the sagittal plane, and the projection of the short axis direction Y of the sound-emitting part 11 on the sagittal plane can have a certain angle with the direction of the sagittal axis, that is, the short axis direction Y is also tilted accordingly, and the projection of the long axis direction X on the sagittal plane can have a certain angle with the direction of the sagittal axis, that is, the long axis direction X is also tilted, and the thickness direction Z is perpendicular to the sagittal plane.
  • the ear hook 12 and the sound-emitting part 11 of such a structure have a good fit with the user's auricle 100, which can increase the resistance of the earphone 10 to falling off the auricle 100, thereby increasing the wearing stability of the earphone 10.
  • connection end CE of the sound-emitting part 11 in the wearing state, when observed along the thickness direction Z, the connection end CE of the sound-emitting part 11 is closer to the top of the head than the free end FE, so that the free end FE can extend into the concha cavity. Based on this, the angle between the short axis direction Y and the direction of the sagittal axis of the human body can be between 30°-40°.
  • the first portion 121 of the ear hook 12 includes a battery compartment 13.
  • the battery compartment 13 contains a battery electrically connected to the sound-emitting portion 11.
  • the battery compartment 13 is located at an end of the first portion 121 away from the sound-emitting portion 11.
  • the projection contour away from the end of the sound-emitting part 11 is the projection contour of the free end of the battery compartment 13 on the user's sagittal plane.
  • the sound-emitting part 11 and the battery compartment 13 may be located at the front and back of the auricle, respectively.
  • the sound-emitting portion 11 may have an inner side facing the auricle along the thickness direction Z and an outer side OS facing away from the auricle in the wearing state, as well as a connecting surface connecting the inner side and the outer side OS. It should be noted that: in the wearing state, the sound-emitting portion 11 may be arranged in a circular, elliptical, rounded square, rounded rectangle, etc. shape when observed along the thickness direction Z. Among them, when the sound-emitting portion 11 is arranged in a circular, elliptical, etc.
  • the above-mentioned connecting surface may refer to the arc-shaped side of the sound-emitting portion 11; and when the sound-emitting portion 11 is arranged in a rounded square, rounded rectangle, etc. shape, the above-mentioned connecting surface may include the lower side surface LS, upper side surface US and rear side surface RS mentioned later. Therefore, for the convenience of description, this embodiment takes the sound-emitting portion 11 as a rounded rectangle as an example for exemplary description. Among them, the length of the sound-emitting portion 11 in the major axis direction X may be greater than the width of the sound-emitting portion 11 in the minor axis direction Y.
  • the sound-emitting portion 11 may have an upper side surface US facing away from the ear canal 101 along the short axis direction Y and a lower side surface LS facing the ear canal 101 in the wearing state, and a rear side surface RS connecting the upper side surface US and the lower side surface LS, the rear side surface RS being located at one end facing the back of the head in the long axis direction X in the wearing state, and at least partially located in the concha cavity 102.
  • the free end FE of the sound-emitting portion 11 is arranged on the rear side surface RS.
  • the sound-emitting portion 11 and the ear hook 12 can jointly clamp the auricle 100 area corresponding to the concha cavity from the front and back sides of the auricle 100 area, thereby increasing the resistance of the earphone 10 to fall off the auricle 100, thereby improving the stability of the earphone 10 in the wearing state.
  • the free end FE of the sound-emitting portion 11 is pressed in the concha cavity in the thickness direction Z.
  • the free end FE abuts against the concha cavity in the major axis direction X and the minor axis direction Y (for example, the free end FE abuts against the inner wall of the concha cavity).
  • the free end FE can refer to a specific area away from the connecting end CE obtained by cutting the sound-emitting portion 11 along the Y-Z plane (the plane formed by the minor axis direction Y and the thickness direction Z), and the ratio of the major axis dimension of the specific area to the major axis dimension of the sound-emitting portion can be 0.05-0.2.
  • the free end FE of the sound-emitting part 11 in addition to extending into the concha cavity, can also be projected onto the antihelix, and can also be projected onto the left and right sides of the head and located in front of the auricle on the sagittal axis of the human body.
  • the ear hook 12 can support the sound-emitting part 11 to be worn in the concha cavity, the antihelix, the front of the auricle and other wearing positions.
  • the earphone 10 shown in Figure 3 is taken as an example to explain the earphone 10 in detail. It should be known that, without violating the corresponding acoustic principles, the structure of the earphone 10 of Figure 3 and its corresponding parameters can also be equally applicable to earphones of other configurations mentioned above.
  • the listening volume at the listening position (for example, at the ear canal), especially the listening volume of the mid-low frequency, can be increased, while still maintaining a good far-field leakage cancellation effect.
  • the sound-emitting part 11 and the concha cavity 102 form a structure similar to a cavity (hereinafter referred to as a quasi-cavity).
  • the quasi-cavity can be understood as a semi-enclosed structure surrounded by the side of the sound-emitting part 11 and the concha cavity 102 structure.
  • the semi-enclosed structure is not completely sealed and isolated from the external environment, but has a leakage structure (for example, an opening, a gap, a pipe, etc.) that is acoustically connected to the external environment.
  • a leakage structure for example, an opening, a gap, a pipe, etc.
  • one or more sound outlet holes may be provided on the side of the shell of the sound-emitting part 11 close to or facing the user's ear canal, and one or more pressure relief holes may be provided on the other side of the shell of the sound-emitting part 11 (for example, the side away from or away from the user's ear canal).
  • the sound outlet hole is acoustically coupled with the front cavity of the earphone 10, and the pressure relief hole is acoustically coupled with the back cavity of the earphone 10.
  • the sound-emitting part 11 includes a sound outlet hole and a pressure relief hole
  • the sound output by the sound outlet hole and the sound output by the pressure relief hole can be approximately regarded as two sound sources, and the sound waves of the two sound sources are in opposite phases.
  • the inner walls corresponding to the sound-emitting part 11 and the cavum concha 102 form a cavity-like structure, wherein the sound source corresponding to the sound outlet hole is located inside the cavity-like structure, and the sound source corresponding to the pressure relief hole is located outside the cavity-like structure, forming the acoustic model shown in FIG4 .
  • FIG4 is a schematic diagram of an acoustic model formed by headphones according to some embodiments of the present specification.
  • a cavity-like structure 402 may include a listening position and at least one sound source 401A.
  • “include” may indicate that at least one of the listening position and the sound source 401A is inside the cavity-like structure 402, or may indicate that at least one of the listening position and the sound source 401A is at the inner edge of the cavity-like structure 402.
  • the listening position may be equivalent to the entrance of the auricle ear canal, or may be an acoustic reference point of the auricle, such as an ear reference point (ERP), an ear-drum reference point (DRP), etc., or may be an entrance structure leading to the listener, etc.
  • ERP ear reference point
  • DRP ear-drum reference point
  • the sound source 401A is wrapped by the cavity-like structure 402, most of the sound radiated by it will reach the listening position by direct or reflected means. In contrast, in the absence of the cavity-like structure 402, most of the sound radiated by the sound source 401A will not reach the listening position. Therefore, the setting of the cavity structure significantly improves the volume of the sound reaching the listening position.
  • the anti-phase sound radiated by the anti-phase sound source 401B outside the cavity-like structure 402 will enter the cavity-like structure 402 through the leakage structure 403 of the cavity-like structure 402.
  • This is equivalent to generating a secondary sound source 401B' at the leakage structure 403, and its intensity is significantly smaller than that of the sound source 401B, and also significantly smaller than that of the sound source 401A.
  • the sound generated by the secondary sound source 401B' has a weak anti-phase cancellation effect on the sound source 401A in the cavity, which significantly increases the listening volume at the listening position.
  • the sound source 401A radiating sound to the outside through the leakage structure 403 of the cavity is equivalent to generating a secondary sound source 401A' at the leakage structure 403, because almost all the sound radiated by the sound source 401A is output from the leakage structure 403, and the scale of the cavity-like structure 402 is much smaller than the space for evaluating sound leakage.
  • the magnitude of the secondary sound source 401A' is the same as that of the sound source 401A.
  • the secondary sound source 401A' and the sound source 401B form a dual sound source to cancel each other and reduce the leakage sound.
  • the outer wall surface of the shell of the sound-emitting part 11 is usually a plane or a curved surface, while the contour of the user's concha 102 is an uneven structure.
  • a cavity-like structure connected to the outside is formed between the sound-emitting part 11 and the contour of the concha 102.
  • the sound outlet hole is set at a position of the shell of the sound-emitting part 11 facing the user's ear canal and close to the edge of the concha 102 (for example, the inner side IS), and the pressure relief hole is set at a position of the sound-emitting part 11 away from or far away from the ear canal, so as to construct the acoustic model shown in Figure 4, so that the user can improve the listening position at the ear mouth when wearing the earphone 10, and reduce the sound leakage effect in the far field.
  • the compatibility between the ear hook 12 and the user's ear can be improved, the wearing stability and adjustability of the earphone 10 can be improved, and the ear hook 12 can also be adjusted to wear the sound-emitting part 11 to the specific position of the user's auricle, thereby improving the listening effect of the earphone 10.
  • the earphone 10 can be projected onto a specific plane, and the earphone 10 can be described by parameters related to the projection shape on the plane.
  • the earphone 10 in the wearing state, can be projected onto the sagittal plane of the human body to form a corresponding projection shape.
  • a first plane similar to the sagittal plane of the human body can be constructed with reference to the relative position relationship between the sagittal plane of the human body and the earphone 10, so that the projection shape formed by the projection of the earphone 10 on the first plane is close to the projection shape formed by the projection of the earphone 10 on the sagittal plane of the human body.
  • the first plane can be determined in the following way: the ear hook 12 is placed on a flat supporting surface (such as a horizontal desktop, a ground plane, etc.), and when the ear hook 12 contacts the supporting surface and is placed stably, the supporting plane is the first plane corresponding to the earphone 10 at this time.
  • the first plane can also be the sagittal plane of the human body.
  • the first plane can also refer to the plane formed by the bisector that bisects the ear hook 12 along its length extension direction or approximately bisects it.
  • Fig. 5 is a schematic diagram of the structure of an earphone in a non-wearing state according to some embodiments of the present specification.
  • Fig. 6 is a first projection formed by projecting an earphone in a non-wearing state on a first plane according to some embodiments of the present specification.
  • the first projection includes an outer contour, a first end contour, an inner contour, and a second end contour.
  • the first end contour may be a projection contour of the free end FE of the sound-emitting portion 11 on the first plane, and the two endpoints P0 and P1 of the first end contour are projection points of the junction between the free end FE and the other parts of the sound-emitting portion 11 on the first plane.
  • the free end FE please refer to the relevant description of FIG. 3 of this specification.
  • the second end contour may be a projection contour of the end BE of the ear hook 12 on the first plane, and the two endpoints Q0 and Q1 of the second end contour are projection points of the junction between the end BE and the other parts of the ear hook 12 on the first plane.
  • the outer contour may be a contour where the first projection is located between point P1 and point Q1.
  • the inner contour may be a contour where the first projection is located between point P0 and point Q0.
  • the end BE of the ear hook 12 may be at least a partial area of the end of the first part of the ear hook 12 away from the second part.
  • the end of the first part of the ear hook 12 away from the second part may be a structure with a regular or irregular shape.
  • an exemplary description is given to further illustrate the end BE of the ear hook 12.
  • the end BE of the ear hook 12 away from the second part is a rectangular parallelepiped structure, its end wall surface is a plane.
  • the end BE of the ear hook 12 is the end side surface of the end of the first part of the ear hook 12 away from the second part.
  • the end BE of the ear hook 12 may be an area obtained by extending a specific distance from the farthest position away from the second part to the second part in the extension direction of the first part of the ear hook 12.
  • the ratio of the specific distance to the total extension distance of the first part of the ear hook 12 may be in the range of 0.05-0.2.
  • the first end contour can be a straight line segment or an arc, and point P0 and point P1 respectively represent the two ends of the first end contour.
  • point P0 can be the intersection point of the arc formed by the projection of the free end FE and the line segment of the upper side projection
  • point P1 can be the intersection point of the arc formed by the projection of the free end FE and the line segment of the lower side projection
  • the end of the ear hook away from the sound-emitting part 11 also has a free end
  • the projection of the free end of the ear hook on the first plane 60 forms a second end contour
  • the second end contour can be a straight line segment or an arc
  • point Q0 and point Q1 respectively represent the two ends of the second end contour.
  • point Q0 and point Q1 can be the two end points of a line segment or an arc projected from the free end of the first part 121 of the ear hook in a direction away from the second part 122 of the ear hook on the first plane 60. Furthermore, in the long axis direction X of the sound-emitting part 11, the end point close to the sound-emitting part 11 is point Q0, and the end point away from the sound-emitting part 11 is Q1.
  • the projection shape of the earphone 10 on the first plane 60 and the sagittal plane of the human body can reflect the wearing method of the earphone 10 on the auricle.
  • the area of the first projection can reflect the area of the auricle that can be covered by the earphone 10 when worn, as well as the contact method between the sound-emitting part 11 and the ear hook and the auricle.
  • the inner contour, outer contour, first end contour, and second end contour in the first projection form a non-enclosed area. The size of this area is related to the earphone 10.
  • a tangent segment 50 connecting the first end contour and the second end contour can be determined, and the tangent segment 50, the inner contour, and the first end contour together define a first closed curve, and the area enclosed by the first closed curve is the first area.
  • the first closed curve can reflect the degree of fit between the sound-emitting portion 11 and the ear hook 12 and the auricle when the earphone 10 is worn.
  • the relative position of the sound-emitting part 11 and the user's ear canal (e.g., the concha cavity) will affect the number of leakage structures of the cavity-like structure formed by the sound-emitting part 11 and the user's concha cavity and the size of the opening of the leakage structure, and the size of the opening of the leakage structure will directly affect the listening quality, specifically, when the first area is too large, the sound-emitting part 11 may not be able to abut the edge of the concha cavity, resulting in an increase in the sound components directly radiated outward by the sound-emitting part 11, and a decrease in the sound reaching the listening position, thereby reducing the sound efficiency of the sound-emitting part 11.
  • the first area of the first closed curve ranges from 300mm2 to 500mm2 .
  • a too small first area will result in an excessively small distance between the extreme point of the ear hook and the sound-emitting part 11, or an excessively large clamping force between the ear hook and the sound-emitting part on the user's auricle. Therefore, in some embodiments, the first area is not less than 200mm2 .
  • the first area of the first closed curve ranges from 250 mm 2 to 400 mm 2 .
  • the shape and size of the ear hook 12 itself need to be further set, so that the ear hook 12 can be adapted to the user's ear and improve the wearing stability and adjustability of the earphone 10, and the sound-emitting part 11 connected to the ear hook 12 can be sufficiently tilted so that the free end FE of the sound-emitting part 11 can be located in the concha cavity 102, thereby improving the listening effect of the earphone 10.
  • the shape and size of the ear hook 12 will be described below in conjunction with the first curve involved in FIG. 7 .
  • FIG. 7 is an exemplary schematic diagram of a first curve of a projection of an earphone on a user's sagittal plane according to some embodiments of the present specification.
  • the first curve L 1 in the projection of the ear hook 12 on the user's sagittal plane can be used as a reference curve of the ear hook 12.
  • the first curve L 1 can be a reference curve corresponding to the inner contour of the projection of the ear hook 12 on the user's sagittal plane.
  • the curve corresponding to the inner contour of the projection of the ear hook 12 on the user's sagittal plane has a leftmost end (point P') and a rightmost end (point Q'), and the portion of the curve between the inner contour of the projection of the ear hook 12 on the user's sagittal plane between the points P' and Q' is the first curve L 1.
  • the actual position corresponding to the point P' on the ear hook 12 is point P
  • the actual position corresponding to the point Q' on the ear hook 12 is point Q, as shown in FIG3 .
  • the shape and size of the ear hook 12 can be determined, thereby improving the compatibility of the ear hook 12 with the user's ear and the wearing stability and adjustability of the earphone 10 on the one hand, and on the other hand, the ear hook 12 can be adjusted to fix the sound-emitting part 11 to the specific position of the user's ear, thereby improving the listening effect of the earphone 10.
  • the size of the first closed curve in the long axis direction of the projection of the sound-emitting part 11 is necessary to limit the size of the first closed curve in the long axis direction of the projection of the sound-emitting part 11. If the size of the first closed curve in the long axis direction of the projection of the sound-emitting part 11 is too small, the connecting end of the ear hook 12 and the sound-emitting part and its end BE will clamp the user's auricle too tightly; if the size of the first closed curve in the long axis direction of the projection of the sound-emitting part 11 is too large, the distance between the sound-emitting part 11 and the vertex of the ear hook described below will be too small, resulting in the free end FE of the sound-emitting part 11 not being able to be located in the concha cavity 102.
  • the size of the first closed curve in the long axis direction of the projection of the sound-emitting part 11 can be represented by the distance between the leftmost end (point P') and the rightmost end (point Q') of the first curve L 1 in the long axis direction of the projection of the sound-emitting part 11.
  • the distance between the leftmost end (point P') and the rightmost end (point Q') of the first curve L 1 ranges from 25mm to 35mm.
  • the distance between the leftmost end (point P') and the rightmost end (point Q') of the first curve L1 ranges from 28mm to 33mm.
  • the distance between the leftmost end (point P') and the rightmost end (point Q') of the first curve L1 ranges from 30mm to 32mm.
  • the long axis direction X of the projection of the sound-emitting part 11 on the sagittal plane can be used as the x-axis, the short axis direction Y as the y-axis, and the intersection of the x-axis and the y-axis as the origin o to establish a first rectangular coordinate system xoy.
  • the first curve L1 can be regarded as a curve in the first rectangular coordinate system xoy.
  • the y-axis direction may be referred to as the first direction, that is, the first direction is perpendicular to the long axis direction X of the projection of the sound-emitting portion 11 on the user's sagittal plane and is directed toward the top of the user's head.
  • the first curve L1 in the first rectangular coordinate system xoy, has an extreme point N' in the first direction.
  • the extreme point N' is located behind the vertex K on the ear hook 12 (represented by the projection point K' of the vertex K on the sagittal plane of the user). That is, in the projection of the ear hook 12 in the sagittal plane of the user, the extreme point N' is located closer to the back of the user's head than the projection point K' of the vertex K.
  • the corresponding point of the extreme point N' on the ear hook 12 is point N, as shown in Figure 3.
  • the angle between the ear hook plane of the ear hook 12 (such as plane S1 in Figure 11) and the sagittal plane of the user can be comprehensively considered to determine the corresponding point N of the extreme point N' on the ear hook 12.
  • the ear hook plane and the sagittal plane of the user in the wearing state, can be parallel.
  • the upper vertex K of the ear hook 12 may be the highest point of the inner contour of the ear hook 12 along the vertical axis of the user in the wearing state, as shown in FIG3. In some embodiments, when the user wears the earphone 10, the ear may mainly support the earphone 10 through the upper vertex K of the ear hook 12. In some embodiments, the upper vertex K of the ear hook 12 may be the position where the inner contour of the ear hook 12 is most curved in the wearing state, as shown in FIG3 and FIG7.
  • the upper vertex K of the ear hook 12 may be the point on the inner contour of the ear hook 12 that is farthest from the end of the ear hook 12 (i.e., the free end at the end of the first part 121, the end of the ear hook 12 that is not connected to the sound-emitting part 11) in the wearing state, as shown in FIG3 and FIG7.
  • the position of the upper vertex K of the ear hook 12 may simultaneously satisfy one or more of the above three positions.
  • the sound-emitting part 11 when the earphone 10 is worn, the sound-emitting part 11 needs to extend into the concha cavity.
  • the distance between the extreme point N of the ear hook and the upper vertex K in the long axis direction X of the sound-emitting part 11 can affect the degree to which the sound-emitting part 11 extends into the concha cavity and the orientation of the sound-emitting part 11 in the concha cavity, thereby affecting the cavity-like structure formed by the sound-emitting part 11 extending into the concha cavity.
  • the orientation of the sound-emitting part 11 in the concha cavity 102 (for example, the long axis direction X) will be too close to the vertical axis, and the gap between the upper side surface US of the sound-emitting part 11 and the concha cavity will be too large, that is, the opening of the cavity-like body formed is too large, and the sound source contained (that is, the sound outlet hole on the inner side surface IS) directly radiates more sound components into the environment, and the sound reaching the listening position is smaller.
  • the sound from the external sound source entering the cavity-like body will increase, resulting in near-field sound cancellation, and further resulting in a worse listening effect.
  • the angle between the direction of the sound-emitting part 11 in the concha cavity (for example, the long axis direction X) and the vertical axis will be too large, and the gap between the upper side US of the sound-emitting part 11 and the concha cavity will be too small or too few, resulting in the formation of a cavity-like opening that is too small or too few, and the effect of reducing sound leakage is poor.
  • the upper side US of the sound-emitting part 11 may abut against the inner wall of the concha cavity, and may even over-squeeze the user's concha cavity, making the user feel uncomfortable and affecting the wearing comfort of the earphone 10.
  • the projection area formed by the inner contour of the ear hook 12 and the size of the ear hook 12 can be limited at the same time.
  • the distance between the extreme point N' and the projection point K' of the upper vertex K can be 6mm-15mm.
  • the distance between the extreme point N' and the projection point K' of the upper vertex K along the long axis direction X of the projection of the sound-emitting part 11 can be the distance between the horizontal coordinate of the extreme point N' and the horizontal coordinate of the projection point K' of the vertex K.
  • the distance between the extreme point N' and the projection point K' of the vertex K on the ear hook 12 on the user's sagittal plane can be 7mm-12mm.
  • the distance between the extreme point N' and the projection point K' of the vertex K on the ear hook 12 on the user's sagittal plane can be 8mm-11mm.
  • the method for measuring the relevant distances and angles of the projection of the earphone 10 on the user's sagittal plane can be: for the earphone 10, take a photo parallel to the projection plane (the user's sagittal plane), measure the relevant distances and angles on the photo, and then convert them according to the scale of the photo to obtain the actual data of the relevant distances and angles on the projection plane.
  • actual measurements can also be performed on the ear hook 12.
  • the distance between the ear hook extreme point N and the upper vertex K can be 6mm- 12mm .
  • the distance between the ear hook extreme point N and the upper vertex K can be 7mm-11mm.
  • the distance between the ear hook extreme point N and the upper vertex K may be 8 mm to 11 mm.
  • the wearing angle of the sound-emitting part 11 relative to the auricle and the concha cavity needs to be further limited.
  • the inclination angle ⁇ between the long axis direction X of the projection of the sound-emitting part 11 and the horizontal direction i.e., the sagittal axis direction shown in FIG.
  • the inclination angle ⁇ between the long axis direction X of the projection of the sound-emitting part 11 and the horizontal direction i.e., the sagittal axis direction shown in FIG. 7
  • the inclination angle ⁇ between the long axis direction X of the projection of the sound-emitting part 11 and the horizontal direction i.e., the sagittal axis direction shown in FIG. 7
  • the inclination angle ⁇ between the long axis direction X of the projection of the sound-emitting part 11 and the horizontal direction i.e., the sagittal axis direction shown in FIG. 7) can be in the range of 15°-18°.
  • the distance of the first closed curve in the first direction of the projection of the sound-emitting part 11 affects the position of the sound-emitting part 11 and the cavum concha. If the distance is too small, the sound-emitting part 11 cannot be inserted into the cavum concha. If the distance is too large, the gap between the sound-emitting part 11 and the cavum concha is too large, resulting in poor listening effect.
  • the distance of the first closed curve in the first direction of the projection of the sound-emitting part 11 can be represented by the distance between the extreme point N' and the leftmost end (point P') of the first curve L1 in the first direction.
  • the distance between the extreme point N' and the leftmost end (point P') of the first curve L1 in the first direction is in the range of 20mm-25mm.
  • the distance between the extreme point N' and the leftmost end (point P') of the first curve L1 ranges from 20mm to 23mm.
  • the distance between the extreme point N' and the leftmost end (point P') of the first curve L1 ranges from 20mm to 22mm.
  • the distance of the first closed curve in the first direction of the projection of the sound-emitting part 11 can be represented by the distance between the projection point K' of the upper vertex K in the first direction and the leftmost end (point P') of the first curve L 1.
  • the distance between the projection point K' of the upper vertex K and the leftmost end (point P') of the first curve L 1 ranges from 17 mm to 22 mm.
  • the distance between the projection point K' of the upper vertex K and the leftmost end (point P') of the first curve L 1 ranges from 17 mm to 20 mm. In some embodiments, to ensure the wearing comfort of the earphone, the distance between the projection point K' of the upper vertex K and the leftmost end (point P') of the first curve L 1 ranges from 18 mm to 20 mm.
  • 8A and 8B are schematic diagrams of exemplary position structures of the center of mass of an earphone according to some embodiments of this specification.
  • the center of mass of the earphone 10 is point F.
  • the mass of the sound-emitting part 11 in the earphone 10 is relatively large. Therefore, the position of the center of mass F of the earphone 10 is close to the position H of the center of mass of the sound-emitting part 11, or is greatly affected by the mass of the sound-emitting part 11, that is, the position of the center of mass F of the earphone 10 can represent the position of the sound-emitting part 11 to a certain extent.
  • the specific position of the center of mass F of the earphone 10 is described in detail below through the relative position of the center of mass F of the earphone 10 and the sound-emitting part 11.
  • the distance between the centroid F of the earphone 10 and the lower side surface LS of the sound-emitting portion 11 may be 2 mm to 6 mm. In some embodiments, on the XY plane, the distance between the centroid F of the earphone 10 and the lower side surface LS of the sound-emitting portion 11 may be 3 mm to 5 mm. In some embodiments, on the XY plane, the distance between the centroid F of the earphone 10 and the lower side surface LS of the sound-emitting portion 11 may be 4 mm to 4.5 mm.
  • the distance between the center of mass F of the earphone 10 and the long axis of the sound-emitting part 11 may be 1 mm to 3 mm. In some embodiments, on the XY plane, the distance between the center of mass F of the earphone 10 and the long axis of the sound-emitting part 11 (i.e., the x-axis) may be 1.5 mm to 2.8 mm.
  • the distance between the center of mass F of the earphone 10 and the long axis of the sound-emitting part 11 may be 2 mm to 2.5 mm.
  • the distance between the center of mass F of the earphone 10 and the free end FE (i.e., the rear side RS) of the sound-emitting portion 11 may be 4 mm to 8 mm. In some embodiments, on the XY plane, the distance between the center of mass F of the earphone 10 and the free end FE (i.e., the rear side RS) of the sound-emitting portion 11 may be 5 mm to 7 mm. In some embodiments, on the XY plane, the distance between the center of mass F of the earphone 10 and the free end FE (i.e., the rear side RS) of the sound-emitting portion 11 may be 6 mm to 6.8 mm.
  • the distance between the centroid F of the earphone 10 and the inner side surface IS of the sound-emitting portion 11 may be 2 mm to 6 mm. In some embodiments, on the XZ plane, the distance between the centroid F of the earphone 10 and the inner side surface IS of the sound-emitting portion 11 may be 3 mm to 5 mm. In some embodiments, on the XZ plane, the distance between the centroid F of the earphone 10 and the inner side surface IS of the sound-emitting portion 11 may be 4.5 mm to 4.8 mm.
  • the wearing stability and adjustability of the earphone 10 can be improved by designing the positions of the mass center F, the upper vertex K, and the ear hook extreme point N of the earphone 10.
  • the earphone 10 is supported, so when the user wears the earphone 10, it can be regarded as forming a "support lever" with the upper vertex K as the support point.
  • the center of mass F of the earphone 10 is located behind the upper vertex K (i.e., the side close to the back of the user's head), which can prevent the earphone 10 from having a tendency to flip forward (i.e., away from the back of the user's head) when worn, thereby improving the wearing stability of the earphone 10.
  • the ear hook extreme point N can be the position with the smallest cross section on the ear hook 12, so that the ear hook 12 is more likely to deform at the ear hook extreme point N. Therefore, when the user wears the earphone 10, the first part 121 of the ear hook 12 and the sound-emitting part 11 will form a structure similar to a "clamping force lever" with the ear hook extreme point N as the fulcrum and clamped on both sides of the user's ear (for example, the front and back sides of the concha cavity).
  • the center of mass F and the upper vertex K of the earphone 10 are respectively located on both sides of the ear hook extreme point N. The positions of the center of mass F, the upper vertex K and the ear hook extreme point N will be further described in detail below.
  • the position between the upper vertex K and the centroid F of the earphone 10 reflects to a certain extent the relative position of the sound-emitting part 11 in the ear when the earphone 10 is worn.
  • the position of the sound-emitting part 11 may be closer to the user's ear canal opening, resulting in the lower position of the sound-emitting part 11 in the concha cavity, and the gap between the upper side US of the sound-emitting part 11 and the concha cavity is too large, resulting in a weak listening effect.
  • the upper side US of the sound-emitting part 11 fits the upper edge of the concha cavity, and the gap between the upper side US and the concha cavity is too small or the number is too small, resulting in poor sound leakage reduction effect, and the sound outlet hole on the sound-emitting part 11 is too far away from the external auditory canal, which has an adverse effect on the listening effect.
  • the distance between the projection point K' of the upper vertex K and the projection point F' of the center of mass F of the earphone 10 may be 22 mm-35 mm.
  • the distance between the projection point K' of the upper vertex K and the projection point F' of the center of mass F of the earphone 10 may be 25 mm-30 mm.
  • the distance between the projection point K' of the upper vertex K and the projection point F' of the center of mass F of the earphone 10 may be 27 mm-29 mm.
  • the distance between the upper vertex K and the center of mass F of the earphone 10 can be 20mm-38mm. In some embodiments, in order to further improve the sound leakage reduction effect, on the earphone 10, the distance between the upper vertex K and the center of mass F of the earphone 10 can be 25mm-32.5mm. In some embodiments, in order to make the cavity-like structure formed by the sound-emitting part 11 and the concha cavity have a more suitable volume and opening size/number, on the earphone 10, the distance between the upper vertex K and the center of mass F of the earphone 10 can be 27mm-30mm.
  • the angle ⁇ 1 between the line connecting the center of mass F of the earphone 10 and the upper vertex K of the ear hook 12 and the long axis direction X of the sound-emitting part 11 may affect the stability of the earphone 10 in the wearing state.
  • the angle ⁇ 1 between the line connecting the center of mass F of the earphone 10 and the upper vertex K of the ear hook 12 and the long axis direction X of the sound-emitting part 11 is too large, the free end FE of the sound-emitting part 11 will be far away from the side of the user's concha cavity, and the clamping of the concha cavity by the sound-emitting part 11 will be weak, resulting in unstable wearing.
  • the angle ⁇ 1 between the line K'F' between the projection point K' of the upper vertex K and the projection point F' of the center of mass F of the earphone 10 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11 can be in the range of 35°-60°.
  • the angle ⁇ 1 between the line K'F' between the projection point K' of the upper vertex K and the projection point F' of the center of mass F of the earphone 10 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11 refers to the angle between the line K'F' in the counterclockwise direction and the x - axis with the positive direction of the x-axis as the reference, as shown in FIG6 .
  • the angle ⁇ 1 between the line K'F' between the projection point K' of the upper vertex K and the projection point F' of the center of mass F of the earphone 10 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11 can be in the range of 40°-55°.
  • the angle ⁇ 1 between the line K'F' between the projection point K' of the upper vertex K and the projection point F' of the center of mass F of the earphone 10 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11 can be in the range of 45°-50°.
  • the angle ⁇ 1 between the line connecting the center of mass F of the earphone 10 and the upper vertex K and the long axis direction X of the sound-emitting part 11 can be 30°-55°.
  • the angle ⁇ 1 between the line connecting the center of mass F of the earphone 10 and the upper vertex K of the ear hook 12 and the long axis direction X of the sound-emitting part 11 can be 40°-50°. In some embodiments, in order to further improve the adjustability of the earphone 10, the angle ⁇ 1 between the line connecting the center of mass F of the earphone 10 and the upper vertex K of the ear hook 12 and the long axis direction X of the sound-emitting part 11 can be 45°-55°. 48°.
  • the projection point of the center of mass F of the earphone 10 on the sagittal plane of the user is point F'.
  • the distance between the center of mass F of the earphone 10 and the extreme point of the ear hook is also related to the stability when worn and the foreign body sensation at the connection position between the user's ear and the head.
  • the clamping position of the earphone 10 on the ear may be too low, and the sound-emitting part 11 may not fit well with the concha cavity when worn, thereby affecting the cavity-like structure and causing unstable wearing, so that the gap between the cavity-like body formed by the sound-emitting part 11 and the concha cavity is too large, thereby deteriorating the listening effect.
  • the distance between the center of mass F of the earphone 10 and the extreme point N of the ear hook is too small, it means that the force arm at both ends of the fulcrum of the aforementioned "clamping force lever" may be too small.
  • the clamping force remains unchanged, the stability of the lever structure will be poor, and the earphone 10 may be unstable when worn.
  • the distance between the extreme point N' and the projection point F' of the center of mass F of the earphone 10 on the projection of the earphone 10 on the sagittal plane of the user can be 20mm-35mm. In some embodiments, in order to further improve the wearing stability of the earphone 10, the distance between the extreme point N' and the projection point F' of the center of mass F of the earphone 10 on the projection of the earphone 10 on the sagittal plane of the user can be 25mm-30mm.
  • the distance between the extreme point N' and the projection point F' of the center of mass F of the earphone 10 on the projection of the earphone 10 on the sagittal plane of the user can be 27mm-28mm.
  • the distance between the center of mass F of the earphone 10 and the ear hook extreme point N on the earphone 10 can be 18mm-40mm. In some embodiments, in order to further improve the wearing stability, the distance between the center of mass F of the earphone 10 and the ear hook extreme point N on the earphone 10 can be 24mm-31mm. In some embodiments, in order to further improve the listening effect, the distance between the center of mass F of the earphone 10 and the ear hook extreme point N can be 26mm-29mm.
  • the first angle ⁇ 2 between the line N'F' between the extreme point N' and the projection point F' of the center of mass of the earphone 10 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11 can be less than 90°, so that the projection point F' of the center of mass F of the earphone 10 is located behind the extreme point N' on the long axis direction X of the sound-emitting part 11.
  • the position of the center of mass F also reflects the clamping position of the sound-emitting part 11 on the concha cavity to a certain extent, that is, the clamping position of the sound-emitting part 11 on the concha cavity is closer to the back of the user's head than the ear hook extreme point N, so as to further enhance the stability of the aforementioned "clamping force lever".
  • the first angle ⁇ 2 between the line N′F′ between the extreme point N′ and the projection point F′ of the centroid of the earphone 10 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11 refers to the angle between the line N′F′ and the x-axis in the counterclockwise direction based on the positive direction of the x-axis, as shown in FIG7 .
  • the size of the first angle ⁇ 2 between the line connecting the centroid F of the earphone 10 and the extreme point N of the earhook and the long axis direction X of the sound-emitting part 11 determines the shape of the inner contour of the earphone 10 to a certain extent, and the shape of the inner contour is related to the user's wearing feeling. Specifically, in order to ensure that the earhook fits the user's ear or head when the user wears the earphone 10, the angle is too large or too small, which may cause the shape to change when worn, affecting the fit and may not form the cavity-like structure shown in Figure 4, affecting the sound efficiency of the sound-emitting part 11.
  • the clamping position of the sound-emitting part 11 is too low or too high relative to the concha cavity, which makes it easy for the earphone 10 to be difficult to stably clamp on the user's ear due to the shape restriction of the concha cavity.
  • the first angle ⁇ 2 between the line N'F' between the extreme point N' and the projection point F' of the centroid F of the earphone 10 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11 can be in the range of 60°-80°.
  • the first angle ⁇ 2 between the line N'F ' between the extreme point N' and the projection point F' of the centroid F of the earphone 10 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11 can be in the range of 60°-75°.
  • the first angle ⁇ 2 between the line N'F' between the extreme point N' and the projection point F' of the center of mass F of the earphone 10 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11 can be in the range of 65°-70°.
  • the first angle ⁇ 2 between the line connecting the center of mass F of the earphone 10 and the extreme point N of the earhook and the long axis direction X of the sound-emitting part 11 can be in the range of 50°-90°.
  • the first angle ⁇ 2 between the line connecting the center of mass F of the earphone 10 and the extreme point N of the earhook and the long axis direction X of the sound-emitting part 11 can be in the range of 60°-75°.
  • the position of the center of mass H of the sound-emitting part 11 can also be directly set to improve the wearing stability and listening effect of the earphone 10.
  • the projection point of the center of mass H of the sound-emitting part 11 on the sagittal plane of the user can coincide with the centroid of the projection of the sound-emitting part 11 on the sagittal plane of the user.
  • the covering position of the sound-emitting part 11 in the concha cavity in the wearing state and the clamping position of the sound-emitting part 11 clamping the concha cavity can be changed at the same time, which can not only affect the stability and comfort of the user wearing the earphone 10, but also affect the listening effect of the earphone 10.
  • the shape and size of the sound-emitting part 11 are consistent, if the distance between the center of mass H of the sound-emitting part 11 and the extreme point N of the ear hook is too small, the upper side US of the sound-emitting part 11 will fit the upper edge of the concha cavity, and the gap between the upper side US and the concha cavity will be too small or too few, and even the interior and the external environment will be completely sealed and isolated, and a cavity-like structure cannot be formed.
  • the sound-emitting part 11 (or the connection area between the ear hook 12 and the sound-emitting part) will be too squeezed on the outer contour of the ear, which will also affect the wearing comfort.
  • the projection point of the center of mass H of the sound-emitting part 11 on the sagittal plane of the user and the centroid of the projection of the sound-emitting part 11 on the sagittal plane of the user are point H', and point H' is located on the long axis of the projection of the sound-emitting part 11, that is, point H' is located on the x-axis.
  • the distance between the extreme point N' and the projection point H' of the center of mass H of the sound-emitting part 11 on the sagittal plane of the user can be 20mm-30mm.
  • the distance between the extreme point N' and the projection point H' of the center of mass H of the sound-emitting part 11 on the sagittal plane of the user can be 22mm-26mm.
  • the distance between the extreme point N' and the projection point H' of the center of mass H of the sound-emitting part 11 on the sagittal plane of the user can be 23mm-25mm.
  • the distance between the center of mass H of the sound-emitting part 11 and the earhook extreme point N can be 20mm-30mm.
  • the distance between the center of mass H of the sound-emitting part 11 and the earhook extreme point N can be 24mm-26mm.
  • the distance between the center of mass H of the sound-emitting part 11 and the earhook extreme point N can be 24mm-26mm.
  • the second angle ⁇ 3 between the line between the centroid H of the sound-emitting part 11 and the ear-hook extreme point N and the long axis direction X of the sound-emitting part 11 can affect the position of the sound-emitting part 11 extending into the concha cavity.
  • the second angle ⁇ 3 between the line between the centroid H of the sound-emitting part 11 and the ear-hook extreme point N and the long axis direction X of the sound-emitting part 11 is too large, the position of the sound-emitting part 11 in the concha cavity is biased downward, and the gap between the upper side surface US of the sound-emitting part 11 and the concha cavity is too large, resulting in a weak listening effect.
  • the second angle ⁇ 3 between the line N'H' between the extreme point N' and the projection point H' of the center of mass H of the sound-emitting part 11 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11 can be less than 90°, so that the projection point H' of the center of mass H of the sound-emitting part 11 is located behind the extreme point N' in the long axis direction X of the sound-emitting part 11, that is, the center of mass H of the sound-emitting part 11 is closer to the back of the user's head than the corresponding point N of the extreme point N' on the ear hook 12, so as to further enhance the stability of the aforementioned "clamping force lever".
  • the second angle ⁇ 3 between the line N'H' between the extreme point N' and the projection point H' of the center of mass H of the sound-emitting part 11 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11 refers to the angle between the line N'H' in the counterclockwise direction and the x-axis with the positive direction of the x-axis as the reference, as shown in FIG. 4 .
  • the projection point between the extreme point N' and the centroid H of the sound-emitting part 11 is
  • the second angle ⁇ 3 between the line N'H' between the extreme point N' and the projection point H' of the center of mass H of the sound-emitting part 11 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11 can be in the range of 65°-85°.
  • the second angle ⁇ 3 between the line N'H' between the extreme point N' and the projection point H' of the center of mass H of the sound-emitting part 11 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11 can be in the range of 70°-80°.
  • the second angle ⁇ 3 between the line N'H' between the extreme point N' and the projection point H' of the center of mass H of the sound-emitting part 11 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11 can be in the range of 75°-79°.
  • the second angle ⁇ 3 between the line connecting the centroid H of the sound-emitting part 11 and the extreme point N of the ear hook and the long axis direction X of the sound-emitting part 11 can also be measured on the ear hook 12.
  • the second angle ⁇ 3 between the line connecting the centroid H of the sound-emitting part 11 and the extreme point N of the ear hook and the long axis direction X of the sound-emitting part 11 can be in the range of 70°-85°.
  • the second angle ⁇ 3 between the line connecting the centroid H of the sound-emitting part 11 and the extreme point N of the ear hook and the long axis direction X of the sound-emitting part 11 can be in the range of 75°-80°.
  • the second angle ⁇ 3 between the line connecting the center of mass H of the sound-emitting part 11 and the extreme point N of the earhook and the long axis direction X of the sound-emitting part 11 can be in the range of 77°-80°.
  • the first angle ⁇ 2 between the line N'F' between the extreme point N' and the projection point F' of the centroid F of the earphone 10 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11 is smaller than the second angle ⁇ 3 between the line N'H' between the extreme point N' and the projection point H' of the centroid H of the sound-emitting part 11 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11.
  • the first angle ⁇ 2 between the line N'F' and the x-axis is smaller than the second angle ⁇ 3 between the line N'H' and the x-axis, so that the centroid F of the earphone 10 is located behind the centroid H of the sound-emitting part 11 in the long axis direction X of the sound-emitting part 11, that is, the centroid F of the earphone 10 is closer to the back of the user's head than the centroid H of the sound-emitting part 11.
  • the ear hook 12 of the earphone 10 can better clamp the user's ear when the earphone 10 is worn, further enhancing the stability of the aforementioned "clamping force lever".
  • the angle ⁇ 4 between the line between the earhook extreme point N and the mass center H of the sound-emitting part 11 and the plane S1 of the earhook 12 can affect the extent to which the sound-emitting part 11 of the earphone 10 is inserted into the concha cavity of the user when the earphone 10 is worn. If the angle ⁇ 4 between the line between the earhook extreme point N and the mass center H of the sound-emitting part 11 and the plane of the earhook 12 is too small, the sound-emitting part 11 will be too deep into the concha cavity, and the position of the sound-emitting part 11 may be too close to the opening of the ear canal of the user.
  • the opening of the ear canal is equivalent to being blocked to a certain extent, and the connection between the opening of the ear canal and the external environment cannot be achieved, which does not achieve the original design intention of the earphone 10 itself. If the angle ⁇ 4 between the line between the earhook extreme point N and the mass center H of the sound-emitting part 11 and the plane of the earhook 12 is too large, it will affect the sound-emitting part 11 from extending into the concha cavity (for example, causing the gap between the sound-emitting part 11 and the concha cavity to be too large), thereby affecting the listening effect of the sound-emitting part 11.
  • FIG. 9 is a schematic diagram of the centroid of an ear hook of an earphone according to other embodiments of the present specification.
  • the distribution of the weight of the ear hook needs to be considered.
  • the center of mass position of the ear hook (such as point M) can be set near the sound-emitting part 11. In this way, after the sound-emitting part 11 extends into the concha cavity, the concha cavity can simultaneously support part of the weight of the sound-emitting part 11 and the ear hook, reducing the sense of pressure on the auricle caused by the fulcrum of the ear hook.
  • the center of mass of the ear hook described here refers to the center of mass of the ear hook as a whole (including the battery compartment 13 but not including the sound-emitting part 11).
  • point T5 is the point at the end of the outer contour of the first projection in the long axis direction of the sound-emitting part 11.
  • the distance L3 between the center of mass position of the ear hook and point T5 is between 22 mm and 49 mm.
  • the distance L3 between the center of mass of the ear hook and point T5 is between 25mm-25mm.
  • the position of the center of mass H of the sound-emitting part 11 can also be directly set to improve the wearing stability and listening effect of the earphone 10.
  • the projection point of the center of mass H of the sound-emitting part 11 on the sagittal plane of the user can coincide with the centroid of the projection of the sound-emitting part 11 on the sagittal plane of the user.
  • the covering position of the sound-emitting part 11 in the cavum conchae in the wearing state and the clamping position of the sound-emitting part 11 clamping the cavum conchae can be changed at the same time, which can not only affect the stability and comfort of the user wearing the earphone 10, but also affect the listening effect of the earphone 10.
  • the shape and size of the sound-emitting part 11 are consistent, if the distance between the center of mass H of the sound-emitting part 11 and the extreme point N of the ear hook is too small, the upper side US of the sound-emitting part 11 will fit the upper edge of the concha cavity, and the gap between the upper side US and the concha cavity will be too small or too few, and even the interior and the external environment will be completely sealed and isolated, and a cavity-like structure cannot be formed.
  • the sound-emitting part 11 (or the connection area between the ear hook 12 and the sound-emitting part) will be too squeezed on the outer contour of the ear, which will also affect the wearing comfort.
  • the projection point of the center of mass H of the sound-emitting part 11 on the sagittal plane of the user and the centroid of the projection of the sound-emitting part 11 on the sagittal plane of the user are point H', and point H' is located on the long axis of the projection of the sound-emitting part 11, that is, point H' is located on the x-axis.
  • the distance between the extreme point N' and the projection point H' of the center of mass H of the sound-emitting part 11 on the sagittal plane of the user can be 20mm-30mm.
  • the distance between the extreme point N' and the projection point H' of the center of mass H of the sound-emitting part 11 on the sagittal plane of the user can be 22mm-26mm.
  • the distance between the extreme point N' and the projection point H' of the center of mass H of the sound-emitting part 11 on the sagittal plane of the user can be 23mm-25mm.
  • the distance between the center of mass H of the sound-emitting part 11 and the earhook extreme point N can be 20mm-30mm.
  • the distance between the center of mass H of the sound-emitting part 11 and the earhook extreme point N can be 24mm-26mm.
  • the distance between the center of mass H of the sound-emitting part 11 and the earhook extreme point N can be 24mm-26mm.
  • the second angle between the line between the centroid H of the sound-emitting part 11 and the earhook extreme point N and the long axis direction X of the sound-emitting part 11 can affect the position of the sound-emitting part 11 extending into the cavum concha.
  • the second angle between the line between the centroid H of the sound-emitting part 11 and the earhook extreme point N and the long axis direction X of the sound-emitting part 11 is too large, the position of the sound-emitting part 11 in the cavum concha is biased downward, and the gap between the upper side surface US of the sound-emitting part 11 and the cavum concha is too large, resulting in a weak listening effect.
  • the upper side surface US of the sound-emitting part 11 fits the upper edge of the cavum concha, and the gap between the upper side surface US and the cavum concha is too small or the number is too small, resulting in a poor sound leakage reduction effect.
  • the second angle ⁇ 3 between the line N'H' between the extreme point N' and the projection point H' of the center of mass H of the sound-emitting part 11 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11 can be less than 90°, so that the projection point H' of the center of mass H of the sound-emitting part 11 is located behind the extreme point N' in the long axis direction X of the sound-emitting part 11, that is, the center of mass H of the sound-emitting part 11 is closer to the back of the user's head than the corresponding point N of the extreme point N' on the ear hook 12, so as to further enhance the stability of the aforementioned "clamping force lever".
  • the second angle ⁇ 3 between the line N'H' between the extreme point N' and the projection point H' of the center of mass H of the sound-emitting part 11 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11 refers to the angle between the line N'H' in the counterclockwise direction and the x-axis with the positive direction of the x-axis as the reference, as shown in FIG7 .
  • the second angle ⁇ 3 between the line N'H' between the extreme point N' and the projection point H' of the centroid H of the sound-emitting part 11 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11 can be in the range of 65°-85°.
  • the second angle ⁇ 3 between the line N'H' between the extreme point N' and the projection point H' of the centroid H of the sound-emitting part 11 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11 can be in the range of 70°-80°.
  • the second angle ⁇ 3 between the line N'H' between the extreme point N' and the projection point H' of the center of mass H of the sound-emitting part 11 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11 can be in the range of 75°-79°.
  • the second angle ⁇ 3 between the line connecting the centroid H of the sound-emitting part 11 and the extreme point N of the ear hook and the long axis direction X of the sound-emitting part 11 can also be measured on the ear hook 12.
  • the second angle ⁇ 3 between the line connecting the centroid H of the sound-emitting part 11 and the extreme point N of the ear hook and the long axis direction X of the sound-emitting part 11 can be in the range of 70°-85°.
  • the second angle ⁇ 3 between the line connecting the centroid H of the sound-emitting part 11 and the extreme point N of the ear hook and the long axis direction X of the sound-emitting part 11 can be in the range of 75°-80°.
  • the second angle ⁇ 3 between the line connecting the center of mass H of the sound-emitting part 11 and the extreme point N of the earhook and the long axis direction X of the sound-emitting part 11 can be in the range of 77°-80°.
  • the first angle ⁇ 2 between the line N'F' between the extreme point N' and the projection point F' of the centroid F of the earphone 10 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11 is smaller than the second angle ⁇ 3 between the line N'H' between the extreme point N' and the projection point H' of the centroid H of the sound-emitting part 11 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11.
  • the first angle ⁇ 2 between the line N'F' and the x-axis is smaller than the second angle ⁇ 3 between the line N'H' and the x-axis, so that the centroid F of the earphone 10 is located behind the centroid H of the sound-emitting part 11 in the long axis direction X of the sound-emitting part 11, that is, the centroid F of the earphone 10 is closer to the back of the user's head than the centroid H of the sound-emitting part 11.
  • the ear hook 12 of the earphone 10 can better clamp the user's ear when the earphone 10 is worn, further enhancing the stability of the aforementioned "clamping force lever".
  • the position between the upper vertex K and the mass center H of the sound-emitting part 11 reflects to a certain extent the relative position of the sound-emitting part 11 in the ear when the earphone 10 is worn. Specifically, when the distance between the mass center H of the sound-emitting part 11 and the upper vertex K of the ear hook 12 is too large, when the user wears the earphone 10, the position of the sound-emitting part 11 may be closer to the user's ear canal opening, resulting in the lower position of the sound-emitting part 11 in the concha cavity, and the gap between the upper side surface US of the sound-emitting part 11 and the concha cavity is too large, resulting in a weak listening effect.
  • the upper side surface US of the sound-emitting part 11 fits the upper edge of the concha cavity, and the gap between the upper side surface US and the concha cavity is too small or the number is too small, resulting in poor sound leakage reduction effect, and the sound outlet hole on the sound-emitting part 11 is too far away from the external auditory canal, which has an adverse effect on the listening effect.
  • the distance between the projection point K' of the upper vertex K and the projection point H' of the center of mass H of the sound-emitting part 11 may be 18 mm-28 mm. In some embodiments, in order to further improve the sound leakage reduction effect, in the projection of the earphone 10 on the user's sagittal plane, the distance between the projection point K' of the upper vertex K and the projection point H' of the center of mass H of the sound-emitting part 11 may be 20 mm-26 mm.
  • the distance between the projection point K' of the upper vertex K and the projection point H' of the center of mass H of the sound-emitting part 11 may be 22 mm-24 mm.
  • the angle between the line connecting the center of mass H of the sound-emitting part 11 and the upper vertex K of the ear hook 12 and the long axis direction X of the sound-emitting part 11 will affect the stability of the earphone 10 when being worn.
  • the angle between the line connecting the center of mass H of the sound-emitting part 11 and the upper vertex K of the ear hook 12 and the long axis direction X of the sound-emitting part 11 is too large, the free end FE of the sound-emitting part 11 will be far away from the side of the user's concha cavity, and the clamping of the concha cavity by the sound-emitting part 11 will be weak, resulting in instability when worn.
  • the angle ⁇ 4 between the line K'H' between the projection point K' of the upper vertex K and the projection point H' of the center of mass H of the sound-emitting part 11 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11 can be in the range of 45°-70°.
  • the angle ⁇ 4 between the line K'H' between the projection point K' of the upper vertex K and the projection point H' of the center of mass H of the sound-emitting part 11 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11 refers to the angle between the line K'H' in the counterclockwise direction and the x-axis with the positive direction of the x-axis as the reference, as shown in FIG7 .
  • the angle ⁇ 4 between the line K'H' between the projection point K' of the upper vertex K and the projection point H' of the center of mass H of the sound-emitting part 11 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11 can be in the range of 50°-65°.
  • the angle ⁇ 4 between the line K'H' between the projection point K' of the upper vertex K and the projection point H' of the center of mass H of the sound-emitting part 11 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 11 can be in the range of 55°-60°.
  • the angle ⁇ 1 between the line connecting the centroid H and the upper vertex K of the sound-emitting part 11 and the long axis direction X of the sound-emitting part 11 can also be measured on the ear hook 12.
  • the angle ⁇ 1 between the line connecting the centroid H of the sound-emitting part 11 and the upper vertex K of the ear hook 12 and the long axis direction X of the sound-emitting part 11 can be 30°-55°.
  • the angle ⁇ 1 between the line connecting the centroid H of the sound-emitting part 11 and the upper vertex K of the ear hook 12 and the long axis direction X of the sound-emitting part 11 can be 40°-50°. In some embodiments, in order to further improve the adjustability of the earphone 10, the angle ⁇ 1 between the line connecting the centroid H of the sound-emitting part 11 and the upper vertex K of the ear hook 12 and the long axis direction X of the sound-emitting part 11 can be 45°-48°.
  • FIG. 10 is a schematic diagram of a tangent segment of a first projection of an earphone according to some embodiments of the present specification.
  • the tangent segment 50 that defines the first closed curve together with the first projection is tangent to the first end contour at the first tangent point K0 and is tangent to the second end contour at the second tangent point K1.
  • the lines connecting the first tangent point K0, the second tangent point K1 and the extreme point (such as point N') of the projection of the ear hook on the first plane can form a triangle.
  • the area change of the triangle formed by the lines connecting the first tangent point K0, the second tangent point K1 and the extreme point of the projection of the ear hook on the first plane will lead to a change in the first area, and will also correspondingly cause the shape of the ear hook 12 to change.
  • the increase in the area of the triangle corresponds to the decrease in the first area, and the size of the ear hook 12 becomes smaller, thereby affecting the wearing feeling of the user.
  • the area of the triangle formed by the first tangent point K0, the second tangent point K1 and the extreme point of the projection of the ear hook on the first plane is between 110mm2-230mm2 .
  • the area of the triangle formed by the first tangent point K0, the second tangent point K1 and the extreme point of the projection of the ear hook on the first plane is between 150mm2-190mm2 , so that the range of the first area of the first closed curve is between 300mm2-500mm2 .
  • the first tangent point K0 and the second tangent point K1 are located close to the inner and outer sides of the cavum concha clamped by the sound-emitting part 11 and the ear hook.
  • the line between the first tangent point K0 and the second tangent point K1 that is, the size of the tangent segment 50 is related to the size of the cavum concha. Therefore, the upper vertex and the first tangent point K0 and the second tangent point K1 can determine the force condition of the cavum concha when the user wears the earphone 10, which is related to the user's wearing experience.
  • the length of the tangent segment 50 is between 11mm-25mm, the distance between the second tangent point K1 and the extreme point of the projection of the ear hook on the first plane is between 31mm-58mm, and the distance between the first tangent point K0 and the extreme point of the projection of the ear hook on the first plane is between 18mm-41mm. If a line segment in the triangle is too long, it will lead to the inability to clamp the concha cavity well, the wearing stability is also poor, and it is easy to fall off; and the sound-emitting part 11 and the ear hook provide a force to approach each other under the drive of elastic force.
  • the length of the tangent segment 50 is between 14mm-22mm.
  • the distance between the second tangent point K1 and the extreme point of the projection of the ear hook on the first plane is between 35mm-55mm.
  • the distance between the first tangent point K0 and the extreme point of the projection of the ear hook on the first plane is between 22mm-38mm.
  • the change in the length of any line segment of the triangle formed by the upper vertex, the first tangent point K0 and the second tangent point K1 will cause the angle of the inner angle of the triangle to change.
  • the angle formed at the second tangent point K1 is between 17°-37°
  • the angle formed at the first tangent point K0 is between 110°-155°
  • the angle formed at the extreme point of the projection of the ear hook on the first plane is between 9°-24°.
  • the angle formed at the second tangent point K1 is between 20°-35°
  • the angle formed at the first tangent point K0 is between 120°-150°
  • the angle formed at the extreme point of the projection of the ear hook on the first plane is between 10°-22°.
  • FIG. 11 is a schematic diagram of a triangle formed by the center of mass of the ear hook, the battery compartment, and the sound-emitting part of the earphone according to some embodiments of the present specification.
  • the three vertices of the triangle 1100 in the figure correspond to the centroid 1110 of the ear hook, the centroid 1120 of the sound-emitting part, and the centroid 1130 of the battery compartment of the earphone 10.
  • the triangle 1100 formed by the aforementioned three centroids affects the stability and comfort of the earphone 10 when worn.
  • the centroid position of the ear hook is related to the shape of the ear hook.
  • the distribution of the three centroids will also affect the centroid position of the earphone 10. If a line segment in the triangle 1100 is too long, the stability of the earphone 10 will be poor when worn.
  • the earphone 10 may tend to tilt toward the position of the sound-emitting part 11 when worn. With the extension of wearing time or the movement of the user when wearing the earphone 10, the sound-emitting part 11 may tilt to a certain extent or even fall off, affecting the user's wearing experience. If the distance between the center of mass 1130 of the battery compartment and the center of mass 1110 of the ear hook is too long, the earphone 10 will tend to tilt toward the battery compartment 13 when worn.
  • the sound-emitting part 11 will also tilt to a certain extent or even fall off, affecting the user's wearing experience.
  • the relative distance between the center of mass 1120 of the sound-emitting part and the center of mass 1110 of the ear hook is between 15mm-40mm; when the earphone 10 is not worn, the relative distance between the center of mass 1130 of the battery compartment and the center of mass 1110 of the ear hook is between 40mm-62mm; the relative distance between the center of mass 1120 of the sound-emitting part and the center of mass 1130 of the battery compartment is between 11mm-35mm.
  • the relative distance between the center of mass 1120 of the sound-emitting part and the center of mass 1110 of the ear hook is between 20mm-35mm; when the earphone 10 is not worn, the relative distance between the center of mass 1130 of the battery compartment and the center of mass 1110 of the ear hook is between 35mm-55mm; the relative distance between the center of mass 1120 of the sound-emitting part and the center of mass 1130 of the battery compartment is between 15mm-30mm.
  • the change of the length of any line segment (the distance between the two centroids) in the triangle 1100 formed by the centroid 1110 of the ear hook, the centroid 1120 of the sound-emitting part, and the centroid 1130 of the battery compartment will cause the internal angle of the triangle 1100 to change, thereby affecting the actual wearing feeling of the earphone 10.
  • the angle formed at the centroid 1120 of the sound-emitting part in the triangle 1000 is too large or too small, it may cause the change of the lever structure formed by the sound-emitting part 11 and the ear hook mentioned above, affecting the user's wearing experience.
  • the angle formed at the centroid 1130 of the battery compartment is between 12°-22°; the angle formed at the centroid of the sound-emitting part is between 111°-164°; and the angle formed at the centroid 1110 of the ear hook is between 11°-24°.
  • the angle formed at the center of mass 1130 of the battery compartment is 15°. -25°; the angle formed at the center of mass of the sound-producing part is between 130°-160°; the angle formed at the center of mass 1110 of the ear hook is between 12°-22°.
  • the sound-emitting part can have other wearing modes other than extending into the concha cavity.
  • the earphone 1200 shown in FIG. 12 is taken as an example to describe the earphone 1200 in detail. It should be noted that, without violating the corresponding acoustic principles, the structure of the earphone 1200 of FIG. 12 and its corresponding parameters can also be applied to the earphones mentioned above that can extend the sound-emitting part into the concha cavity.
  • FIG. 12 is a schematic diagram showing exemplary wearing of headphones according to still other embodiments of the present specification.
  • the output effect of the earphone 1200 can be improved, that is, the sound intensity at the near-field listening position is increased, while the volume of the far-field sound leakage is reduced.
  • one or more sound outlet holes can be provided on the shell of the sound-emitting portion 1201 close to or facing the user's ear canal, and one or more pressure relief holes are provided on the other side of the shell of the sound-emitting portion 1201 (for example, the side away from or away from the user's ear canal).
  • the sound outlet hole is acoustically coupled with the front cavity of the earphone 1200
  • the pressure relief hole is acoustically coupled with the back cavity of the earphone 1200.
  • the sound-emitting portion 1201 includes a sound outlet hole and a pressure relief hole
  • the sound output by the sound outlet hole and the sound output by the pressure relief hole can be approximately regarded as two sound sources, and the sound of the two sound sources is equal in magnitude and opposite in phase.
  • the sound emitted by the sound outlet can be directly transmitted to the user's ear canal without hindrance, while the sound emitted by the pressure relief hole needs to bypass the shell of the sound-emitting part 1201 or pass through the sound-emitting part 1201 to form an acoustic model similar to that shown in FIG13.
  • the sound field of the point sound source A2 needs to bypass the baffle to interfere with the sound wave of the point sound source A1 at the listening position, which is equivalent to increasing the sound path from the point sound source A2 to the listening position.
  • the amplitude difference between the sound waves of the point sound source A1 and the point sound source A2 at the listening position increases compared to the case where no baffle is provided, thereby reducing the degree of cancellation of the two-way sound at the listening position, thereby increasing the volume at the listening position.
  • the sound waves generated by the point sound source A1 and the point sound source A2 can interfere in a larger spatial range without bypassing the baffle (similar to the case without a baffle), the sound leakage in the far field will not increase significantly compared to the case without a baffle. Therefore, by setting a baffle structure around one of the sound sources of the point sound source A1 and the point sound source A2, the volume at the near-field listening position can be significantly increased without significantly increasing the volume of the far-field sound leakage.
  • FIG. 13 is a schematic diagram of an acoustic model formed by headphones according to some other embodiments of the present specification.
  • the sound output from the sound outlet and the sound output from the pressure relief hole can be approximately regarded as two sound sources, namely, point sound source A1 and point sound source A2 , and the sound of the two sound sources is equal in magnitude and opposite in phase.
  • the sound emitted by the sound outlet can be directly transmitted to the user's ear canal without hindrance, while the sound emitted by the pressure relief hole needs to bypass the shell of the sound-emitting part 1201 or pass through the sound-emitting part 1201 to form an acoustic model similar to that shown in FIG13.
  • the sound field of the point sound source A2 needs to bypass the baffle to interfere with the sound wave of the point sound source A1 at the listening position, which is equivalent to increasing the sound path from the point sound source A2 to the listening position. Therefore, assuming that the point sound source A1 and the point sound source A2 have the same amplitude, the amplitude difference of the sound waves of the point sound source A1 and the point sound source A2 at the listening position increases compared to the case where no baffle is set, thereby reducing the degree of cancellation of the two-way sound at the listening position, so that the volume at the listening position increases.
  • the sound waves generated by the point sound source A1 and the point sound source A2 do not need to bypass the baffle to interfere in a larger spatial range (similar to the case without a baffle), the sound leakage in the far field will not increase significantly compared to the case without a baffle. Therefore, by setting a baffle structure around one of the sound sources of the point sound source A1 and the point sound source A2 , the volume at the near-field listening position can be significantly improved without significantly increasing the sound leakage volume in the far field.
  • FIG. 14 is a projection diagram of the earphone on the first plane in a non-wearing state according to some embodiments of the present specification.
  • the ear hook 1202 and the sound-emitting part 1201 form a second projection on the first plane
  • the second projection includes an outer contour, a first end contour, an inner contour, and a second end contour.
  • the first end contour in the second projection can be the projection contour of the free end FE of the sound-emitting part 1201 on the first plane
  • the two end points P0 and P1 of the first end contour are the projection points of the intersection position of the free end FE and the other parts of the sound-emitting part 1201 on the first plane.
  • the second end contour can be the projection contour of the end BE of the ear hook 1202 on the first plane, and the two end points Q0 and Q1 of the second end contour are the projection points of the intersection position of the end BE and the other parts of the ear hook 1202 on the first plane.
  • the outer contour can be the contour of the first projection between point P1 and point Q1.
  • the inner contour can be the contour of the second projection between point P0 and point Q0.
  • the first end contour can be a straight line segment or a circular arc
  • point P0 and point P1 respectively represent the two ends of the first end contour.
  • point P0 can be the intersection point of the arc formed by the projection of the free end of the sound-emitting part 1201 and the line segment of the upper side projection.
  • point P1 can be the intersection point of the arc formed by the projection of the free end of the sound-emitting part 1201 and the line segment of the lower side projection.
  • the end of the ear hook 1202 away from the sound-emitting part 1201 also has a free end, and the projection of the free end of the ear hook 1202 on the first plane 60 forms a second end contour.
  • the second end contour may be a straight line segment or an arc, and point Q0 and point Q1 represent the two ends of the second end contour, respectively.
  • point Q0 and point Q1 may be the two end points of a line segment or an arc projected from the free end of the first part of the ear hook 1202 on the first plane 60 in a direction away from the second part of the ear hook. Further, in the long axis direction Y of the sound-emitting portion 11, the end point close to the sound-emitting portion 11 is point Q0, and the end point away from the sound-emitting portion 11 is point Q1.
  • the projection shape of the earphone 1200 on the first plane and the sagittal plane of the human body can reflect the wearing method of the earphone 1200 on the ear.
  • the area of the second projection can reflect the area of the auricle that the earphone 1200 can cover in the non-wearing state/wearing state, and the contact method between the sound-emitting part 1201 and the ear hook 1202 and the ear.
  • the inner contour, the outer contour, the first end contour, and the second end contour in the second projection form a non-closed area.
  • the size of this area is closely related to the wearing effect of the earphone 1200 (for example, the wearing stability, the sound-emitting position, etc.).
  • the tangent segment 1250 connecting the first end contour and the second end contour can be determined, and the area enclosed by the second closed curve defined by the tangent segment 1250, the outer contour, the first end contour, and the second end contour is used as the area of the second projection (also referred to as the "second area").
  • the earphone 1200 is different from the earphone 10 shown in FIG. 5 in that the sound-emitting portion 1201 of the earphone 1200 is located at the user's antihelix 105 when the earphone is worn, so the range of the second area is smaller than the first area.
  • the second area in the non-wearing state, may be 0.2 to 0.6 times the first area. In some embodiments, the second area may be 0.3 to 0.5 times the first area.
  • the second area of the second closed curve may be in the range of 50 mm 2 to 200 mm 2.
  • the second area of the second closed curve is in the range of 80 mm 2 to 150 mm 2 .
  • the shape and size of the ear hook 1202 itself need to be further set, so that the ear hook 1202 can be adapted to the user's ear and improve the wearing stability and adjustability of the earphone 10, and the sound-emitting part 1201 connected to the ear hook 1202 is located at the antihelix to avoid the sound-emitting part 1201 blocking the ear canal, thereby avoiding affecting the user's acquisition of the sound in the external environment, so that the user has a better acoustic experience.
  • the shape and size of the ear hook 1202 will be explained in conjunction with the first curve involved in FIG. 14 .
  • the first curve L 2 in the projection of the ear hook 1202 on the user's sagittal plane can be used as a reference curve for the ear hook 1202.
  • the first curve L 2 can be a reference curve corresponding to the inner contour of the projection of the ear hook 1202 on the user's sagittal plane.
  • the inner contour corresponding to the projection of the ear hook 1202 on the user's sagittal plane has a leftmost end (point P') and a rightmost end (point Q'), and the portion of the curve between the inner contour of the projection of the ear hook 1202 on the user's sagittal plane between the points P' and Q' is the first curve L 2 .
  • the shape and size of the ear hook 1202 can be determined, thereby improving the compatibility of the ear hook 1202 with the user's ear and the wearing stability and adjustability of the earphone 10 on the one hand, and on the other hand, the ear hook 1202 can be adjusted to fix the sound-emitting part 1201 to the specific position of the user's ear, thereby improving the listening effect of the earphone 10.
  • the second area of the second closed curve After setting the second area of the second closed curve to be between 50mm2-200mm2 , it is necessary to limit the size of the second closed curve in the long axis direction of the projection of the sound-emitting part 1201. If the size of the second closed curve in the long axis direction of the projection of the sound-emitting part 11 is too small, the connection end between the ear hook 1202 and the sound-emitting part and its end BE will clamp the user's auricle too tightly; if the size of the second closed curve in the long axis direction of the projection of the sound-emitting part 11 is too large, the distance between the sound-emitting part 11 and the vertex such as the ear hook will be too small, affecting the fit between the sound-emitting part 1201 and the antihelix, thereby causing discomfort when wearing.
  • the size of the second closed curve in the long axis direction of the projection of the sound-emitting part 1201 can be represented by the distance between the leftmost end (point P') and the rightmost end (point Q') of the first curve L2 in the long axis direction of the projection of the sound-emitting part 1201.
  • the distance between the leftmost end (point P') and the rightmost end (point Q') of the first curve L2 ranges from 25mm to 35mm.
  • the distance between the leftmost end (point P') and the rightmost end (point Q') of the first curve L2 ranges from 28mm to 33mm. In some embodiments, in the long axis direction of the projection of the sound-emitting part 1201, the distance between the leftmost end (point P') and the rightmost end (point Q') of the first curve L2 ranges from 30mm to 32mm.
  • a second rectangular coordinate system xoy can be established with the long axis direction X of the projection of the sound-emitting part 1201 on the sagittal plane as the x-axis, the short axis direction Y as the y-axis, and the intersection of the x-axis and the y-axis as the origin o.
  • the first curve L2 can be regarded as a curve in the second rectangular coordinate system xoy.
  • the y-axis direction can be referred to as the first direction, that is, the first direction is perpendicular to the long axis direction X of the projection of the sound-emitting part 1201 on the user's sagittal plane and is directed toward the top of the user's head.
  • the first curve L2 in the second rectangular coordinate system xoy, has an extreme point N' in the first direction.
  • the extreme point N' is located at the vertex K on the ear hook 1202 (with The projection point K' of the upper vertex on the sagittal plane of the user indicates the front or back side of the ear hook, or the extreme point N' coincides with the projection point K' of the ear hook upper vertex K. That is, on the projection of the ear hook 1202 in the user's sagittal plane, the position of the extreme point N' is farther away from the back of the user's head or closer to the back of the user's head than the projection point K' of the upper vertex, or the positions of the two coincide.
  • the upper vertex of the ear hook 1202 may be the highest point of the inner contour of the ear hook 1202 along the vertical axis of the user in the wearing state. In some embodiments, when the user wears the headset 10, the ear may support the headset 1200 mainly through the upper vertex of the ear hook 1202. In some embodiments, the upper vertex of the ear hook 1202 may be the position where the inner contour of the ear hook 1202 is most curved in the wearing state.
  • the upper vertex of the ear hook 1202 may be the point on the inner contour of the ear hook 1202 that is farthest from the end of the ear hook 1202 (i.e., the end of the first part 121, the end of the ear hook 1202 that is not connected to the sound-emitting part 1201) in the wearing state.
  • the position of the upper vertex of the ear hook 1202 may simultaneously satisfy one or more of the above three positions.
  • the sound-emitting part 1201 when the earphone 1200 is worn, the sound-emitting part 1201 needs to be located at the antihelix, and the distance between the extreme point of the ear hook and the upper vertex in the long axis direction X of the sound-emitting part 1201 can affect the position of the sound-emitting part 1201 relative to the antihelix and the direction of the sound-emitting part 1201.
  • the orientation of the sound-emitting part 1201 at the antihelix 102 (for example, the long axis direction X) will be too close to the vertical axis, making the contact friction between the sound-emitting part 1201 and the antihelix too small, thereby making the sound-emitting part 1201 unstable to wear and easy to slide toward the ear canal.
  • the distance between the extreme point N' and the projection point K' of the upper vertex may be no greater than 5mm, that is, the distance between the extreme point N' and the projection point K' of the upper vertex may be 0mm-5mm.
  • the distance between the extreme point N' and the projection point K' of the upper vertex of the ear hook 1202 may be 0mm-3mm. In some embodiments, on the projection of the ear hook 1202 on the user's sagittal plane, along the long axis direction X of the projection of the sound-emitting part 1201, the distance between the extreme point N' and the projection point K' of the upper vertex of the ear hook 1202 can be 0mm-2mm.
  • the distance between the extreme point N' and the projection point K' of the upper vertex does not limit the orientation between the two, and the extreme point N' can be located in front of or behind the projection point K' of the upper vertex; when the distance between the extreme point N' and the projection point K' of the upper vertex is 0mm, it means that the extreme point N' coincides with the projection point K' of the upper vertex.
  • the method for measuring the relevant distances and angles of the projection of the earphone 1200 on the user's sagittal plane can be: for the earphone 1200, take a photo parallel to the projection plane (the user's sagittal plane), measure the relevant distances and angles on the photo, and then convert them according to the scale of the photo to obtain the actual data of the relevant distances and angles on the projection plane.
  • the inclination angle range of the long axis direction X of the projection of the sound-emitting part 1201 and the horizontal direction can be 0°-15°.
  • the inclination angle range of the long axis direction X of the projection of the sound-emitting part 1201 and the horizontal direction can be 0°-10°. In some embodiments, the inclination angle range of the long axis direction X of the projection of the sound-emitting part 1201 and the horizontal direction can be 0°-5°.
  • the distance of the second closed curve in the first direction of the projection of the sound-emitting part 1201 affects the position of the sound-emitting part 1201 and the anti-helix. If the distance is too small, the free end FE of the sound-emitting part 1201 will extend out of the auricle 100 of the user. If the distance is too large, the sound-emitting part 1201 will block the ear canal, making the ear canal insufficiently open.
  • the distance of the second closed curve in the first direction of the projection of the sound-emitting part 1201 can be represented by the distance between the extreme point N' and the leftmost end (point P') of the first curve L1 in the first direction.
  • the distance between the extreme point N' and the leftmost end (point P') of the first curve L2 ranges from 15mm to 20mm. In some embodiments, the distance between the extreme point N' and the leftmost end (point P') of the first curve L2 ranges from 15mm to 18mm. In some embodiments, the distance between the extreme point N' and the leftmost end (point P') of the first curve L2 ranges from 16mm to 28mm.
  • the distance of the second closed curve in the first direction of the projection of the sound-emitting part 1201 can be represented by the distance between the projection point K' of the upper vertex in the first direction and the leftmost end (point P') of the first curve L 2.
  • the distance between the projection point K' of the upper vertex and the leftmost end (point P') of the first curve L 2 ranges from 12mm to 17mm.
  • the distance between the projection point K' of the upper vertex and the leftmost end (point P') of the first curve L 2 ranges from 13mm to 16mm.
  • the distance between the projection point K' of the upper vertex and the leftmost end (point P') of the first curve L 2 ranges from 14mm to 15mm.
  • the center of mass of the earphone 1210 is point F.
  • the mass of the sound-emitting part 1201 in the earphone 1210 is relatively large. Therefore, the position of the center of mass F of the earphone 1210 is close to the position H of the center of mass of the sound-emitting part 1201, or is greatly affected by the mass of the sound-emitting part 1201, that is, the position of the center of mass F of the earphone 1210 can represent the position of the sound-emitting part 1201 to a certain extent.
  • the specific position of the center of mass F of the earphone 1210 is described in detail below through the relative position of the center of mass F of the earphone 1210 and the sound-emitting part 1201.
  • the distance between the center of mass point F of the earphone 1210 and the upper side surface (the side close to the head) of the sound-emitting portion 1201 may be 2 mm-5 mm. In some embodiments, on the XY plane, the distance between the center of mass point F of the earphone 1210 and the upper side surface of the sound-emitting portion 1201 may be 2.5 mm-4.5 mm. In some embodiments, on the XY plane, the distance between the center of mass point F of the earphone 1210 and the upper side surface of the sound-emitting portion 1201 may be 3 mm-4 mm.
  • the distance between the center of mass F of the earphone 1210 and the long axis (i.e., the x-axis) of the sound-emitting part 1201 may be 1 mm-2 mm. In some embodiments, on the XY plane, the distance between the center of mass F of the earphone 1210 and the long axis (i.e., the x-axis) of the sound-emitting part 1201 may be 1.2 mm-1.8 mm.
  • the distance between the center of mass F of the earphone 1210 and the long axis (i.e., the x-axis) of the sound-emitting part 1201 may be 1.3 mm-1.5 mm.
  • the distance between the center of mass F of the earphone 1210 and the free end FE of the sound-emitting portion 1201 may be 4 mm to 8 mm. In some embodiments, on the XY plane, the distance between the center of mass F of the earphone 1210 and the free end FE (i.e., the rear side RS) of the sound-emitting portion 1201 may be 6 mm to 8 mm. In some embodiments, on the XY plane, the distance between the center of mass F of the earphone 1210 and the free end FE (i.e., the rear side RS) of the sound-emitting portion 1201 may be 6.5 mm to 7 mm.
  • the distance between the center of mass point F of the earphone 1210 and the inner side surface of the sound-emitting part 1201 may be 3 mm-8 mm. In some embodiments, on the XZ plane, the distance between the center of mass point F of the earphone 1210 and the inner side surface of the sound-emitting part 1201 may be 4 mm-6 mm. In some embodiments, on the XZ plane, the distance between the center of mass point F of the earphone 1210 and the inner side surface of the sound-emitting part 1201 may be 4.5 mm-5 mm.
  • the wearing stability and adjustability of the earphone 1210 can be improved by designing the position of the centroid F, the upper vertex, and the extreme point of the ear hook of the earphone 1210.
  • the ear since the ear mainly supports the earphone 1210 through the upper vertex of the ear hook 12, when the user wears the earphone 1210, it can be regarded as forming a "support lever" with the upper vertex K as the support point.
  • the centroid F of the earphone 1210 is located behind the upper vertex (i.e., the side close to the back of the user's head), which can prevent the earphone 1210 from having a tendency to flip forward (i.e., away from the back of the user's head) in the wearing state, thereby improving the wearing stability of the earphone 1210.
  • the ear hook extreme point may be the position with the smallest cross section on the ear hook 12, so that the ear hook 12 is more likely to deform at the ear hook extreme point N.
  • the first part 121 of the ear hook 12 and the sound-emitting part 1201 will use the ear hook extreme point N as a fulcrum to form a structure similar to a "clamping force lever” and clamp on both sides of the user's ear (for example, the front and back sides of the antihelix).
  • the center of mass F and the upper vertex K of the earphone 1210 are respectively located on both sides of the ear hook extreme point N. The positions of the center of mass F, the upper vertex K and the ear hook extreme point N will be further described in detail below.
  • the first part of the ear hook 1202 and the sound-emitting part 1201 will use the ear hook extreme point as a fulcrum to form a structure similar to a "clamping force lever” and clamp on both sides of the user's ear (for example, the front and back sides of the concha cavity).
  • the center of mass F and the upper vertex of the headphone ear hook 1202 are respectively located on both sides of the ear hook extreme point. The positions of the center of mass F, the upper vertex and the ear hook extreme point will be further described in detail below.
  • the projection point of the centroid F of the earphone 1210 on the sagittal plane of the user is point F'.
  • the distance between the projection point F' of the centroid F of the earphone 1210 and the extreme point of the ear hook is also related to the stability when worn and the foreign body sensation at the connection position between the ear and the head of the user.
  • the clamping position of the earphone 1210 on the ear may be too low, and the sound-emitting part 1201 may block the ear canal when worn, resulting in poor openness of the ear canal.
  • the distance between the projection point F' of the centroid F of the earphone 1210 and the extreme point of the ear hook is too small, it means that the force arms at both ends of the fulcrum of the aforementioned "clamping force lever" may be too small.
  • the clamping force remains unchanged, the stability of the lever structure is poor, and the earphone 1210 may be unstable when worn.
  • the distance between the extreme point N' and the projection point F' of the center of mass F of the headset 1210 on the projection of the headset 1210 on the sagittal plane of the user may be 15mm-30mm. In some embodiments, in order to further improve the wearing stability of the headset 1210, the distance between the extreme point N' and the projection point F' of the center of mass F of the headset 1210 on the projection of the headset 1210 on the sagittal plane of the user may be 18mm-28mm. In some embodiments, the distance between the extreme point N' and the projection point F' of the center of mass F of the headset 1210 on the projection of the headset 1210 on the sagittal plane of the user may be 20mm-24mm.
  • the size of the third angle b1 between the line connecting the centroid F of the earphone 1210 and the extreme point of the ear hook and the long axis direction X of the sound-emitting part 1201 determines the shape of the inner contour of the earphone 1210 to a certain extent, and the shape of the inner contour is related to the wearing feeling of the user. Specifically, in order to ensure that the ear hook fits the ear or head of the user when the user wears the earphone 1210, the angle is too large or too narrow. If the angle b1 is too small, the shape of the earphone 1201 may change when worn.
  • the clamping position of the sound-emitting part 1201 is too low relative to the antihelix.
  • the clamping position of the sound-emitting part 1201 is too high relative to the antihelix, and the free end FE of the sound-emitting part 1201 may extend beyond the edge of the auricle.
  • the third angle b1 between the line N'F' between the extreme point N' and the projection point F' of the center of mass of the earphone 1210 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 1201 can be less than 90°, so that the projection point F' of the center of mass F of the earphone 1210 is located behind the extreme point N' on the long axis direction X of the sound-emitting part 1201.
  • the position of the center of mass F also reflects the clamping position of the sound-emitting part 1201 on the concha cavity to a certain extent, that is, the clamping position of the sound-emitting part 1201 on the concha cavity is closer to the back of the user's head than the ear hook extreme point N, so as to further enhance the stability of the aforementioned "clamping force lever".
  • the third angle b1 between the line N'F' between the extreme point N' and the projection point F' of the centroid of the earphone 1210 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 1201 refers to the angle between the line N'F' and the x-axis in the counterclockwise direction with the positive direction of the x-axis as the reference, as shown in FIG14.
  • the third angle b1 between the line N'F' between the extreme point N' and the projection point F' of the centroid F of the earphone 1210 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 1201 may be in the range of 50°-87°.
  • the third angle b1 between the line N'F' between the extreme point N' and the projection point F' of the centroid F of the earphone 1210 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 1201 may be in the range of 55°-80°.
  • the third angle b1 between the line N'F' between the extreme point N' and the projection point F' of the centroid F of the earphone 1210 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 1201 may be in the range of 60°-75°.
  • the position of the center of mass F of the earphone 1210 is greatly affected by the position of the sound-emitting part 1201, when the overall volume of the ear hook 12 does not change much, the position between the upper vertex and the center of mass F of the earphone 1210 reflects to a certain extent the relative position of the sound-emitting part 1201 in the ear when the earphone 1210 is worn.
  • the position of the sound-emitting part 1201 may be closer to the opening of the user's ear canal, causing the position of the sound-emitting part 1201 in the antihelix to be lower, causing the sound-emitting part 1201 to block the ear canal.
  • the free end FE of the sound-emitting part 1201 may extend out of the edge of the auricle.
  • the distance between the projection point K' of the upper vertex and the projection point F' of the center of mass F of the earphone 1210 may be 17 mm-30 mm. In some embodiments, the distance between the projection point K' of the upper vertex and the projection point F' of the center of mass F of the earphone 1210 may be 20 mm-28 mm. In some embodiments, the distance between the projection point K' of the upper vertex and the projection point F' of the center of mass F of the earphone 1210 may be 22 mm-25 mm.
  • the angle between the line between the center of mass F of the earphone 1210 and the upper vertex of the ear hook 12 and the long axis direction X of the sound-emitting part 1201 may affect the stability of the earphone 1210 when worn.
  • the angle between the line between the center of mass F of the earphone 1210 and the upper vertex of the ear hook 12 and the long axis direction X of the sound-emitting part 1201 is too large, the free end FE of the sound-emitting part 1201 will be far away from the edge of the helix 107, and the clamping of the sound-emitting part 1201 to the antihelix will be weak, resulting in unstable wearing.
  • the angle b2 between the line K'F' between the projection point K' of the upper vertex and the projection point F' of the center of mass F of the earphone 1210 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 1201 can be in the range of 30°-55°.
  • the angle between the line K'F ' between the projection point K' of the upper vertex and the projection point F' of the center of mass F of the earphone 1210 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 1201 refers to the angle between the line K'F' in the counterclockwise direction and the x-axis with the positive direction of the x-axis as the reference, as shown in FIG. 14 .
  • the angle b2 between the line K'F' between the projection point K' of the upper vertex and the projection point F' of the center of mass F of the earphone 1210 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 1201 can be in the range of 35°-50°.
  • the angle b2 between the line K'F' between the projection point K' of the upper vertex and the projection point F' of the center of mass F of the earphone 1210 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 1201 can be in the range of 38°-45°.
  • the position of the center of mass H of the sound-emitting part 1201 can also be directly set to improve the wearing stability of the earphone 1210.
  • the projection point of the center of mass H of the sound-emitting part 1201 on the sagittal plane of the user can coincide with the centroid of the projection of the sound-emitting part 1201 on the sagittal plane of the user.
  • the covering position of the sound-emitting part 1201 in the antihelix in the wearing state and the clamping position of the sound-emitting part 1201 clamping the antihelix can be changed at the same time, so as to affect the stability and comfort of the user wearing the earphone 1210.
  • the shape and size of the sound-emitting part 1201 are consistent, if the distance between the center of mass H of the sound-emitting part 1201 and the extreme point of the ear hook is too large, the position of the sound-emitting part 1201 in the antihelix may be lower, and the ear canal may be blocked by the sound-emitting part 1201.
  • the shape and size of the sound-emitting part 1201 are consistent, if the distance between the center of mass H of the sound-emitting part 1201 and the extreme point of the ear hook is too small, the free end FE of the sound-emitting part 1201 may extend out of the edge of the auricle, which may also affect the wearing comfort.
  • the projection point of the center of mass H of the sound-emitting part 1201 on the sagittal plane of the user and the centroid of the projection of the sound-emitting part 1201 on the sagittal plane of the user are point H', and point H' is located on the long axis of the projection of the sound-emitting part 1201, that is, point H' is located on the x-axis.
  • the distance between the extreme point N' and the projection point H' of the center of mass H of the sound-emitting part 1201 on the sagittal plane of the user can be 20mm-30mm.
  • the distance between the extreme point N' and the projection point H' of the center of mass H of the sound-emitting part 1201 on the sagittal plane of the user can be 15mm-25mm. In some embodiments, the distance between the extreme point N' and the projection point H' of the center of mass H of the sound-emitting part 1201 on the sagittal plane of the user can be 18mm-22mm.
  • the fourth angle between the line between the centroid H of the sound-emitting part 1201 and the extreme point of the ear hook and the long axis direction X of the sound-emitting part 1201 can affect the position of the sound-emitting part 1201 on the antihelix.
  • the fourth angle between the line between the centroid H of the sound-emitting part 1201 and the extreme point of the ear hook and the long axis direction X of the sound-emitting part 1201 is too large, the sound-emitting part 1201 may block the ear canal.
  • the free end FE of the sound-emitting part 1201 may extend out of the edge of the auricle, which will also affect the wearing comfort.
  • the fourth angle b3 between the line N'H' between the extreme point N' and the projection point H' of the center of mass H of the sound-emitting part 1201 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 1201 takes a value range of 60°-87°, so that the projection point H' of the center of mass H of the sound-emitting part 1201 is located on the rear side of the extreme point N' on the long axis direction X of the sound-emitting part 1201, that is, the center of mass H of the sound-emitting part 1201 is closer to the back of the user's head than the corresponding point N of the extreme point N' on the ear hook 12, so as to further enhance the stability of the aforementioned "clamping force lever".
  • the fourth angle b 3 between the line N'H' between the extreme point N' and the projection point H' of the centroid H of the sound-emitting part 1201 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 1201 refers to the angle between the line N'H' and the x-axis in the counterclockwise direction with the positive direction of the x-axis as the reference, as shown in FIG14 .
  • the fourth angle b 3 between the line N'H' between the extreme point N' and the projection point H' of the centroid H of the sound-emitting part 1201 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 1201 may be in the range of 65°-82°. In some embodiments, the fourth angle b 3 between the line N'H' between the extreme point N' and the projection point H' of the centroid H of the sound-emitting part 1201 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 1201 may be in the range of 70°-78°.
  • the fourth angle b3 between the line N'H' between the extreme point N' and the projection point H' of the center of mass H of the sound-emitting part 1201 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 1201 can be in the range of 72°-76°.
  • the third angle b1 between the line N'F' between the extreme point N' and the projection point F' of the centroid F of the earphone 1210 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 1201 is smaller than the fourth angle b3 between the line N'H' between the extreme point N' and the projection point H' of the centroid H of the sound-emitting part 1201 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 1201.
  • the third angle b1 between the line N'F' and the x-axis is smaller than the fourth angle b3 between the line N'H' and the x-axis, so that the centroid F of the earphone 1210 is located behind the centroid H of the sound-emitting part 1201 in the long axis direction X of the sound-emitting part 1201, that is, the centroid F of the earphone 1210 is closer to the back of the user's head than the centroid H of the sound-emitting part 1201.
  • the ear hook 12 of the earphone 1210 can better clamp the user's ear when being worn, further enhancing the stability of the aforementioned "clamping force lever".
  • the position between the upper vertex and the center of mass H of the sound-emitting part 1201 reflects to a certain extent the relative position of the sound-emitting part 1201 in the ear when the earphone 1210 is worn. Specifically, when the distance between the center of mass H of the sound-emitting part 1201 and the upper vertex of the ear hook 12 is too large, when the user wears the earphone 1210, the position of the sound-emitting part 1201 may be closer to the user's ear canal opening, causing the position of the sound-emitting part 1201 in the antihelix to be lower, thereby causing the sound-emitting part 1201 to block the ear canal.
  • the free end FE of the sound-emitting part 1201 may extend out of the edge of the auricle, resulting in a poor wearing experience.
  • the distance between the projection point K' of the upper vertex and the projection point H' of the center of mass H of the sound-emitting part 1201 may be 10 mm-20 mm. In some embodiments, on the projection of the earphone 1210 on the user's sagittal plane, the distance between the projection point K' of the upper vertex and the projection point H' of the center of mass H of the sound-emitting part 1201 may be 12 mm-18 mm.
  • the distance between the projection point K' of the upper vertex and the projection point H' of the center of mass H of the sound-emitting part 1201 may be 14 mm-16 mm.
  • the angle between the line connecting the center of mass H of the sound-emitting part 1201 and the upper vertex of the ear hook 12 and the long axis direction X of the sound-emitting part 1201 will affect the stability of the earphone 1210 when being worn.
  • the angle between the line connecting the center of mass H of the sound-emitting part 1201 and the upper vertex of the ear hook 12 and the long axis direction X of the sound-emitting part 1201 is too large, the free end FE of the sound-emitting part 1201 will be far away from the side of the user's antihelix, and the grip of the sound-emitting part 1201 on the antihelix will be weak, resulting in instability during wearing.
  • the free end FE of the sound-emitting part 1201 fits too tightly with the edge of the user's auricle, affecting the wearing comfort of the earphone 1210 and reducing the adjustability of the earphone 1210.
  • the angle b4 between the line K'H' between the projection point K' of the upper vertex and the projection point H' of the center of mass H of the sound-emitting part 1201 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 1201 can be in the range of 35°-65°.
  • the angle b4 between the line K'H' between the projection point K' of the upper vertex and the projection point H' of the center of mass H of the sound-emitting part 1201 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 1201 refers to the angle between the line K'H' in the counterclockwise direction and the x-axis with the positive direction of the x-axis as the reference, as shown in FIG14 .
  • the angle b4 between the line K'H' between the projection point K' of the upper vertex and the projection point H' of the center of mass H of the sound-emitting part 1201 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 1201 can be in the range of 40°-60°.
  • the angle b4 between the line K'H' between the projection point K' of the upper vertex and the projection point H' of the center of mass H of the sound-emitting part 1201 and the long axis direction X (i.e., the x-axis direction) of the projection of the sound-emitting part 1201 can be in the range of 45°-55°.
  • FIG. 15 is a schematic diagram of a tangent segment of a second projection of an earphone according to some embodiments of the present specification.
  • the tangent segment 1250 that defines the second closed curve together with the second projection is tangent to the first end contour at the first tangent point K0 and tangent to the second end contour at the second tangent point K1.
  • the lines connecting the first tangent point K0, the second tangent point K1 and the extreme point N' of the projection of the ear hook on the first plane can form a triangle.
  • the area change of the triangle formed by the lines connecting the first tangent point K0, the second tangent point K1 and the extreme point of the projection of the ear hook on the first plane will lead to a change in the second area, and will also lead to a corresponding change in the shape and size of the ear hook 12.
  • an increase in the area of the triangle corresponds to a decrease in the second area, and the size of the ear hook 12 becomes smaller, thereby affecting the user's wearing feeling.
  • the area of the triangle formed by the first tangent point K0, the second tangent point K1 and the extreme point of the projection of the ear hook on the first plane is between 110mm2-230mm2 .
  • the area of the triangle formed by the first tangent point K0, the second tangent point K1 and the extreme point of the projection of the ear hook on the first plane is between 150mm2-190mm2 , so that the range of the second area of the second closed curve is between 1150mm2-1350mm2 .
  • the first tangent point K0 and the second tangent point K1 are located close to the inner and outer sides of the antihelix clamped by the sound-emitting portion 1201 and the ear hook.
  • the line between the first tangent point K0 and the second tangent point K1 i.e., the size of the tangent segment 1250 is related to the size of the antihelix. Therefore, the upper vertex and the first tangent point K0 and the second tangent point K1 can determine the force applied to the antihelix when the user wears the earphone 1210, which is related to the user's wearing experience.
  • the length of the tangent segment 1250 is between 11 mm and 25 mm
  • the distance between the second tangent point K1 and the extreme point of the projection of the ear hook on the first plane is between 31 mm and 58 mm
  • the distance between the first tangent point K0 and the extreme point of the projection of the ear hook on the first plane is between 18 mm and 41 mm. If a line segment in the triangle is too long, it will lead to the inability to clamp the antihelix well, the wearing stability is also poor, and it is easy to fall off; and the sound-emitting part 1201 and the ear hook provide a force to approach each other under the drive of elastic force.
  • the length of the tangent segment 1250 is between 14mm-22mm.
  • the distance between the second tangent point K1 and the extreme point of the projection of the ear hook on the first plane is between 35mm-55mm.
  • the distance between the first tangent point K0 and the extreme point of the projection of the ear hook on the first plane is between 22mm-38mm.
  • the change in the length of any line segment of the triangle formed by the upper vertex, the first tangent point K0 and the second tangent point K1 will cause the angle of the inner angle of the triangle to change.
  • the angle formed at the second tangent point K1 is between 17°-37°
  • the angle formed at the first tangent point K0 is between 110°-155°
  • the angle formed at the extreme point of the projection of the ear hook on the first plane is between 9°-24°.
  • the angle formed at the second tangent point K1 is between 20°-35°
  • the angle formed at the first tangent point K0 is between 120°-150°
  • the angle formed at the extreme point of the projection of the ear hook on the first plane is between 10°-22°.
  • the distance between the center of mass H of the sound-emitting part 1201 and the center of mass M of the ear hook 1202 will affect the shape of the first curve formed by the ear hook 1202, thereby affecting the stability and comfort of the ear hook 1202 when worn.
  • the distance of the first curve formed by the ear hook 1202 in the long axis direction X is too small, which may cause the free end FE of the sound-emitting part 1201 to fit too tightly with the edge of the user's auricle, affecting the wearing comfort of the ear hook 1202; if the distance between the center of mass H of the sound-emitting part 1201 and the center of mass M of the ear hook 1202 is too large, the distance of the first curve formed by the ear hook 1202 in the long axis direction X is too large, which may cause the free end FE of the sound-emitting part 1201 to extend out of the edge of the auricle, resulting in a poor wearing experience.
  • the distance between the projection point H' of the center of mass H of the sound-emitting part 1201 and the projection point M' of the center of mass M of the ear hook 1202 is between 25mm and 40mm.
  • the distance between the projection point H' of the center of mass H of the sound-emitting part 1201 and the projection point M' of the center of mass M of the ear hook 1202 is between 28mm and 36mm. In some embodiments, in the non-wearing state, in the projection of the ear hook 1202 on the sagittal plane of the user, the distance between the projection point H' of the center of mass H of the sound-emitting part 1201 and the projection point M' of the center of mass M of the ear hook 1202 is between 30mm and 34mm.

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  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
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  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Headphones And Earphones (AREA)

Abstract

本说明书实施例提供一种耳机，包括：发声部，包括换能器和容纳换能器的壳体；耳挂，耳挂包括第一部分和第二部分；在佩戴状态下，第一部分挂设在用户耳廓和头部之间，第二部分向耳廓背离头部的一侧延伸并连接发声部，将发声部佩戴于耳道附近但不堵塞耳道口的位置；其中，耳挂和发声部在用户的矢状面形成第一投影，在非佩戴状态下，第一投影与切线段共同界定出第一封闭曲线，第一封闭曲线的第一面积范围在300mm2-500mm2之间；内轮廓中与耳挂对应的部分包括第一曲线，第一曲线在第一方向具有极值点，第一方向垂直于发声部投影的长轴方向；极值点位于耳挂上顶点在矢状面上的投影点的后侧，耳挂上顶点为佩戴状态下耳挂的内侧壁沿用户垂直轴的最高点。

Description

一种耳机
交叉引用
本申请要求2022年10月28日提交的申请号为202211336918.4的中国申请的优先权，2022年12月01日提交的申请号为202223239628.6的中国申请的优先权，2022年12月30日提交的申请号为PCT/CN2022/144339的国际申请的优先权，2023年03月02日提交的申请号为PCT/CN2023/079401的国际申请的优先权，2023年03月24日提交的申请号为PCT/CN2023/083534的国际申请的优先权，全部内容通过引用并入本文。
技术领域
本申请涉及声学技术领域，具体涉及一种耳机。
背景技术
随着声学输出技术的发展，声学装置(例如，耳机)已广泛地应用于人们的日常生活，其可以与手机、电脑等电子设备配合使用，以便于为用户提供听觉盛宴。耳机是一种在特定范围内实现声传导的便携式音频输出设备。与传统的入耳式、耳罩式耳机相比，耳机具有不堵塞、不覆盖耳道的特点，可以让用户在聆听音乐的同时，获取外界环境中的声音信息，提高安全性与舒适感。耳机的输出性能对于用户的使用舒适度具有很大的影响。
因此，有必要提出一种耳机，以提高耳机的输出性能。
发明内容
本申请实施例提供了一种耳机，其包括：发声部，包括换能器和容纳所述换能器的壳体；耳挂，所述耳挂包括第一部分和第二部分；在佩戴状态下，所述第一部分挂设在用户耳廓和头部之间，所述第二部分向耳廓背离头部的一侧延伸并连接所述发声部，将所述发声部佩戴于耳道附近但不堵塞耳道口的位置；其中，所述耳挂和所述发声部在用户的矢状面形成第一投影，所述第一投影包括外轮廓、第一端部轮廓、内轮廓和第二端部轮廓，在非佩戴状态下，所述内轮廓、所述第一端部轮廓、所述第二端部轮廓以及连接所述第一端部轮廓和所述第二端部轮廓的切线段共同界定出第一封闭曲线，所述第一封闭曲线的第一面积范围在300mm2-500mm2之间；所述内轮廓中与所述耳挂对应的部分包括第一曲线，所述第一曲线在第一方向具有极值点，所述第一方向垂直于所述发声部投影的长轴方向；所述极值点位于所述耳挂上顶点在所述矢状面上的投影点的后侧，所述耳挂上顶点为佩戴状态下所述耳挂的内侧壁沿用户垂直轴的最高点。
在一些实施例中，在佩戴状态下，所述壳体的至少部分插入耳甲腔。
在一些实施例中，沿所述发声部投影的长轴方向上，所述极值点与所述耳挂上顶点在用户的矢状面上的投影点的距离为6mm-15mm。
在一些实施例中，在所述发声部投影的长轴方向上，所述内轮廓中与所述耳挂对应的部分包括最左端与最右端，所述最左端与所述最右端分别为所述第一曲线的两端点，在非佩戴状态下，在所述发声部投影的长轴方向上，所述最左端与所述最右端的距离为25mm-35mm。
在一些实施例中，在所述发声部投影的长轴方向上，所述内轮廓中与所述耳挂对应的部分包括最左端，在非佩戴状态下，在所述第一方向上，所述极值点与所述最左端的距离为20mm-25mm。
在一些实施例中，在所述发声部投影的长轴方向上，所述内轮廓中与所述耳挂对应的部分包括最左端，在非佩戴状态下，在所述第一方向上，所述上顶点在所述矢状面上的投影点与所述最左端的距离为17mm-22mm。
在一些实施例中，在非佩戴状态下，所述耳机的质心在所述矢状面的投影点与所述极值点的距离为20mm-35mm。
在一些实施例中，在非佩戴状态下，所述极值点与所述发声部质心在所述矢状面上的投影点的距离范围为20mm-30mm。
在一些实施例中，在非佩戴状态下，所述耳挂上顶点在所述矢状面上的投影点与所述耳机的质心在所述矢状面上的投影点的距离为22mm-35mm。
在一些实施例中，在非佩戴状态下，所述耳挂上顶点在所述矢状面上的投影点与所述发声部质心在所述矢状面上的投影点的距离为18mm-28mm。
在一些实施例中，所述切线段与所述第一端部轮廓相切于第一切点，与所述第二端部轮廓相切于第二切点，所述开放式耳机在非佩戴状态下，所述第一切点、所述第二切点与极值点构成的三角形的面积在150mm2-190mm2之间。
在一些实施例中，在非佩戴状态下，所述发声部质心在所述矢状面的投影点与所述耳挂的质心的在所述矢状面的投影点的距离为20mm-35mm。
本申请实施例还提供了一种耳机，其包括：发声部，包括换能器和容纳所述换能器的壳体；耳挂，所述耳挂包括第一部分和第二部分；在佩戴状态下，所述第一部分挂设在用户耳廓和头部之间，所述第二部分向耳廓背离头部的一侧延伸并连接所述发声部，将所述发声部佩戴于耳道附近但不堵塞耳道口的位置；其中，所述耳挂和所述发声部在用户的矢状面形成第二投影，所述第二投影包括外轮廓、第一端部轮廓、内轮廓和第二端部轮廓，在非佩戴状态下，所述内轮廓、所述第一端部轮廓、所述第二端部轮廓以及连接所述第一端部轮廓和所述第二端部轮廓的切线段共同界定出第二封闭曲线，所述第二封闭曲线的第二面积范围在50mm2-200mm2之间；所述内轮廓中与所述耳挂对应的部分包括第一曲线，所述第一曲线在第一方向具有极值点，所述第一方向垂直于所述发声部投影的长轴方向；沿所述发声部投影的长轴方向上，所述极值点与所述耳挂上顶点在用户的矢状面上的投影点的距离不大于5mm，所述耳挂上顶点为佩戴状态下所述耳挂的内侧壁沿用户垂直轴的最高点。
在一些实施例中，在佩戴状态下，所述壳体的至少部分覆盖对耳轮区域。
在一些实施例中，在所述发声部投影的长轴方向上，所述内轮廓中与所述耳挂对应的部分包括最左端与最右端，所述最左端与所述最右端分别为所述第一曲线的两端点，在所述发声部投影的长轴方向上，所述最左端与所述最右端的距离为25mm-35mm。
在一些实施例中，在所述发声部投影的长轴方向上，所述内轮廓中与所述耳挂对应的部分包括最左端，在非佩戴状态下，在所述第一方向上，所述极值点与所述最左端的距离为15mm-20mm。
在一些实施例中，在所述发声部投影的长轴方向上，所述内轮廓中与所述耳挂对应的部分包括最左端，在非佩戴状态下，在所述第一方向上，所述上顶点在所述矢状面上的投影点与所述最左端的距离为12mm-17mm。
在一些实施例中，在非佩戴状态下，所述耳机的质心在所述矢状面的投影点与所述极值点的距离为15mm-30mm。
在一些实施例中，在非佩戴状态下，所述极值点与所述发声部质心在所述矢状面上的投影点的距离范围为15mm-25mm。
在一些实施例中，在非佩戴状态下，所述耳挂上顶点在所述矢状面上的投影点与所述耳机的质心在所述矢状面上的投影点的距离为17mm-30mm。
在一些实施例中，在非佩戴状态下，所述耳挂上顶点在所述矢状面上的投影点与所述发声部质心在所述矢状面上的投影点的距离为10mm-20mm。
在一些实施例中，所述切线段与所述第一端部轮廓相切于第一切点，与所述第二端部轮廓相切于第二切点，所述开放式耳机在非佩戴状态下，所述第一切点、所述第二切点与极值点构成的三角形的面积在150mm2-190mm2之间。
在一些实施例中，在非佩戴状态下，所述发声部质心在所述矢状面的投影点与所述耳挂的质心的在所述矢状面的投影点的距离为25mm-40mm。
附图说明
本申请将以示例性实施例的方式进一步说明，这些示例性实施例将通过附图进行详细描述。这些实施例并非限制性的，在这些实施例中，相同的编号表示相同的结构，其中：
图1是根据本说明书一些实施例所示的示例性耳廓的示意图；
图2是根据本说明书一些实施例所示的耳机的示例性佩戴示意图；
图3是根据本说明书一些实施例所示的耳机的示例性结构图；
图4是根据本说明书一些实施例所示的耳机形成的声学模型示意图；
图5是根据本说明书一些实施例所示的非佩戴状态下的耳机的结构示意图；
图6是根据本说明书一些实施例所示的非佩戴状态下的耳机在第一平面上投影形成的第一投影；
图7是根据本说明书一些实施例所示的耳机在用户的矢状面的投影的第一曲线的示例性示意图；
图8A与图8B是根据本说明书一些实施例所示的耳机的质心的示例性位置结构示意图；
图9是根据本说明书另一些实施例所示的耳机的耳挂的质心的示意图；
图10是根据本说明书一些实施例所示的耳机的第一投影的切线段的示意图；
图11是根据本说明书一些实施例所示的耳机的耳挂、电池仓和发声部的质心形成的三角 形的示意图；
图12是根据本说明书又一些实施例所示的耳机的示例性佩戴示意图；
图13是根据本说明书又一些实施例所示的耳机形成的声学模型示意图；
图14是根据本说明书一些实施例所示的非佩戴状态下耳机在第一平面的投影图；
图15是根据本说明书一些实施例所示的耳机的第二投影的切线段的示意图。
具体实施方式
为了更清楚地说明本申请实施例的技术方案，下面将对实施例描述中所需要使用的附图作简单的介绍。显而易见地，下面描述中的附图仅仅是本申请的一些示例或实施例，对于本领域的普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图将本申请应用于其它类似情景。除非从语言环境中显而易见或另做说明，图中相同标号代表相同结构或操作。
应当理解，本文使用的“系统”、“装置”、“单元”和/或“模组”是用于区分不同级别的不同组件、元件、部件、部分或装配的一种方法。然而，如果其他词语可实现相同的目的，则可通过其他表达来替换所述词语。
如本申请和权利要求书中所示，除非上下文明确提示例外情形，“一”、“一个”、“一种”和/或“该”等词并非特指单数，也可包括复数。一般说来，术语“包括”与“包含”仅提示包括已明确标识的步骤和元素，而这些步骤和元素不构成一个排它性的罗列，方法或者设备也可能包含其它的步骤或元素。
在本说明书的描述中，需要理解的是，术语“第一”、“第二”、“第三”、“第四”等仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”、“第三”、“第四”的特征可以明示或者隐含地包括至少一个该特征。在本说明书的描述中，“多个”的含义是至少两个，例如两个、三个等，除非另有明确具体的限定。
在本说明书中，除非另有明确的规定和限定，术语“连接”、“固定”等术语应做广义理解。例如，术语“连接”可以指固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本说明书中的具体含义。
图1是根据本申请的一些实施例所示的示例性耳廓的示意图。参见图1，耳廓100可以包括耳道101、耳甲腔102、耳甲艇103、三角窝104、对耳轮105、耳舟106、耳轮107、耳垂108、耳轮脚109、外轮廓1013和内轮廓1014。需要说明的是，为便于描述，本说明书实施例中将对耳轮上脚1011和对耳轮下脚1012以及对耳轮105统称为对耳轮区域。在一些实施例中，可以借助耳廓100的一个或多个部位实现声学装置的佩戴和稳定。在一些实施例中，耳道101、耳甲腔102、耳甲艇103、三角窝104等部位在三维空间中具有一定的深度及容积，可以用于实现声学装置的佩戴需求。例如，声学装置(例如，入耳式耳机)可以佩戴于耳道101中。在一些实施例中，可以借助耳廓100中除耳道101外的其他部位，实现声学装置的佩戴。例如，可以借助耳甲艇103、三角窝104、对耳轮105、耳舟106、耳轮107等部位或其组合实现声学装置的佩戴。在一些实施例中，为了改善声学装置在佩戴方面的舒适度及可靠性，也可以进一步借助用户的耳垂108等部位。通过借助耳廓100中除耳道101之外的其他部位，实现声学装置的佩戴和声音的传播，可以“解放”用户的耳道101，降低声学装置对用户耳朵健康的影响。当用户在道路上佩戴声学装置时，声学装置不会堵塞用户耳道101，用户既可以接收来自声学装置的声音又可以接收来自环境中的声音(例如，鸣笛声、车铃声、周围人声、交通指挥声等)，从而能够降低交通意外的发生概率。例如，在用户佩戴声学装置时，声学装置的整体或者部分结构可以位于耳轮脚109的前侧(例如，图1中虚线围成的区域J)。又例如，在用户佩戴声学装置时，声学装置的整体或者部分结构可以与耳道101的上部(例如，耳轮脚109、耳甲艇103、三角窝104、对耳轮105、耳舟106、耳轮107等一个或多个部位所在的位置)接触。再例如，在用户佩戴声学装置时，声学装置的整体或者部分结构可以位于耳廓的一个或多个部位(例如，耳甲腔102、耳甲艇103、三角窝104等)内(例如，图1中虚线围成的至少包含耳甲艇103、三角窝104的区域M1和与至少包含耳甲腔102的区域M2)。
不同的用户可能存在个体差异，导致耳廓100存在不同的形状、大小等尺寸差异。为了便于描述和理解，如果没有特别说明，本说明书将主要以具有“标准”形状和尺寸的耳廓模型作为参考，进一步描述不同实施例中的声学装置在该耳廓模型上的佩戴方式。例如，可以以基于ANSI:S3.36,S3.25和IEC:60318-7标准制得的含头部及其(左、右)耳廓100的模拟器，例如 GRAS45BCKEMAR，作为佩戴声学装置的参照物，以此呈现出大多数用户正常佩戴声学装置的情景。仅仅作为示例，作为参考的耳廓100可以具有如下相关特征：耳廓在矢状面上的投影在垂直轴方向的尺寸可以在49.5-74.3mm的范围内，耳廓在矢状面上的投影在矢状轴方向的尺寸可以在36.6-55mm的范围内。因此，本申请中，诸如“用户佩戴”、“处于佩戴状态”及“在佩戴状态下”等描述可以指本申请所述的声学装置佩戴于前述模拟器的耳廓100。当然，考虑到不同的用户存在个体差异，耳廓100中一个或多个部位的结构、形状、大小、厚度等可以根据不同形状和尺寸的耳廓100进行差异化设计，这些差异化设计可以表现为声学装置中一个或多个部位(例如，下文中的发声部、耳挂等)的特征参数可以具有不同范围的数值，以此适应不同的耳廓100。另外，需要说明的是：“非佩戴状态”并非仅限于耳机未佩戴于用户耳廓100的状态，而是也包括耳机未受外力作用而变形的状态；“佩戴状态”并非仅限于耳机佩戴于用户耳廓100的状态，悬挂结构(例如，耳挂)和发声部摆开至相应的距离也可以视为是佩戴状态。
需要说明的是：在医学、解剖学等领域中，可以定义人体的矢状面(SagittalPlane)、冠状面(CoronalPlane)和水平面(HorizontalPlane)三个基本切面以及矢状轴(SagittalAxis)、冠状轴(CoronalAxis)和垂直轴(VerticalAxis)三个基本轴。其中，矢状面是指沿身体前后方向所作的与地面垂直的切面，它将人体分为左右两部分；冠状面是指沿身体左右方向所作的与地面垂直的切面，它将人体分为前后两部分；水平面是指沿身体上下方向所作的与地面平行的切面，它将人体分为上下两部分。相应地，矢状轴是指沿身体前后方向且垂直于冠状面的轴，冠状轴是指沿身体左右方向且垂直于矢状面的轴，垂直轴是指沿身体上下方向且垂直于水平面的轴。进一步地，本申请所述的“耳廓的前侧”是一个相对于“耳廓的后侧”的概念，前者指耳廓背离头部的一侧，后者指耳廓朝向头部的一侧，他们均是针对用户的耳廓。其中，沿人体冠状轴所在方向观察上述模拟器的耳廓，可以得到图1所示的耳廓的前侧轮廓示意图。
关于上述耳廓100的描述仅是出于阐述的目的，并不旨在限制本申请的范围。对于本领域的普通技术人员来说，可以根据本申请的描述，做出各种各样的变化和修改。例如，声学装置的部分结构可以遮蔽耳道101的部分或者全部。这些变化和修改仍处于本申请的保护范围之内。
图2是根据本说明书一些实施例所示的耳机的示例性佩戴示意图。
在一些实施例中，耳机10可以包括但不限于气传导耳机及骨气导耳机等。在一些实施例中，耳机10可以与眼镜、头戴式耳机、头戴式显示装置、AR/VR头盔等产品相结合。
如图2所示，耳机10可以包括发声部11和耳挂12。在一些实施例中，耳机10可以通过耳挂12将发声部11佩戴在用户身体上(例如，人体的头部、颈部或者上部躯干)。在一些实施例中，耳机10可以通过耳挂12将发声部11固定于耳道附近但不堵塞耳道的位置，使得用户耳廓100保持开放的状态，在用户既能听到耳机10输出的声音的同时，又能获取外部环境的声音。例如，耳机10可以环绕设置或者部分环绕设置在用户耳廓100的周侧，并可以通过气传导或骨传导的方式进行声音的传递。
在一些实施例中，耳挂12包括第一部分121和第二部分122，第一部分121和第二部分122依次连接。在佩戴状态下，耳挂12的第一部分121挂设在用户耳廓和头部之间，第二部分122向耳廓背离头部的一侧延伸并连接发声部11，将发声部11佩戴于耳道附近但不堵塞耳道的位置。
在一些实施例中，为了改善耳机10在佩戴状态下的稳定性，耳机10可以采用以下几种方式中的任何一种或其组合。其一，耳挂12的至少部分设置成与耳廓100的后侧和头部中的至少一者贴合的仿形结构，以增加耳挂12与耳廓100和/或头部的接触面积，从而增加耳机10从耳廓100上脱落的阻力。其二，耳挂12的至少部分设置成弹性结构，使之在佩戴状态下具有一定的形变量，以增加耳挂12对耳廓100和/或头部的正压力，从而增加耳机10从耳廓100上脱落的阻力。其三，耳挂12至少部分设置成在佩戴状态下抵靠在头部上，使之形成压持耳廓100的反作用力，以使得发声部11压持在耳廓100的前侧，从而增加耳机10从耳廓100上脱落的阻力。其四，发声部11和耳挂12设置成在佩戴状态下从耳廓100的前后两侧夹持对耳轮105所在区域、耳甲腔所在区域等，从而增加耳机10从耳廓100上脱落的阻力。其五，发声部11或者与之连接的辅助结构设置成至少部分伸入耳甲腔102、耳甲艇103、三角窝104及耳舟106等腔体内，从而增加耳机10从耳廓100上脱落的阻力。
在一些实施例中，耳挂12可以具有与用户头部与耳廓100交界处相适配的弧状结构，以使耳挂12可以挂设在用户耳廓100和头部之间。示例性地，耳机10的第一部分121连接第二部分122与发声部11，以使得耳机10处于非佩戴状态(也即是自然状态)时在三维空间中呈弯曲状。换言之，在三维空间中，第二部分122、第一部分121、发声部11不共面。如此设置，以在耳机10处 于佩戴状态时，第二部分122可以挂设在用户的耳廓100后侧与头部之间，发声部11与用户的耳廓100前侧(例如，图1中的区域M3)或耳廓100(例如，图1中的区域M1、区域M2)接触，发声部11和第二部分122可以配合以夹持耳廓100。具体地，第一部分121可以从头部向头部的外侧延伸，进而与第二部分122配合为发声部11提供对耳廓100前侧或耳廓100的压紧力。其中，发声部11在压紧力的作用下具体可以抵压于耳廓100前侧或耳甲腔102、耳甲艇103、三角窝104、对耳轮105等部位所在的区域，以使得耳机10处于佩戴状态时不遮挡耳廓100的耳道101。
在一些实施例中，发声部11包括壳体111以及设置在壳体111内的换能器。
壳体111与耳挂12连接，并用于承载换能器。在一些实施例中，壳体111可以是内部中空的封闭式壳体结构，且换能器位于壳体111的内部。在一些实施例中，耳机10可以与眼镜、头戴式耳机、头戴式显示装置、AR/VR头盔等产品相结合，在这种情况下，壳体111可以采用悬挂或夹持的方式固定在用户的耳廓100的附近。在一些可替代的实施例中，壳体111上可以设有悬挂结构(例如，挂钩)。例如，挂钩的形状与耳廓的形状相匹配，耳机10可以通过挂钩独立佩戴在用户的耳廓100上。
在一些实施例中，壳体111可以为具有人体耳廓100适配形状的壳体结构，例如，圆环形、椭圆形、跑道形、多边形(规则或不规则)、U型、V型、半圆形等规则或不规则形状，以便壳体111可以直接挂靠在用户的耳廓100处。在一些实施例中，壳体111还可以包括固定结构。固定结构可以包括耳挂、弹性带等，使得耳机10可以更好地佩戴在用户身上，防止用户在使用时发生掉落。
在一些实施例中，当用户佩戴耳机10时，发声部11可以位于用户耳廓100的上方、下方、前侧(例如，图1中示出耳屏前侧的区域J)或耳廓内(例如，耳甲腔所在区域M2)。发声部11上还可以开设有用于传递声音的两个或两个以上的声学孔(例如出声孔与泄压孔)。在一些实施例中，发声部11内的换能器可以通过两个或两个以上的声学孔输出具有相位差(例如，相位相反)的声音。
换能器用于将激励信号(例如电信号)转换为相应的机械振动从而产生声音。在一些实施例中，换能器可以包括一个振膜。当振膜振动时，声音可以分别从该振膜的前侧和后侧发出。在一些实施例中，壳体111内振膜前侧的位置设有用于传递声音的前腔(未示出)。前腔与一个声学孔(例如出声孔)声学耦合，振膜前侧的声音可以通过前腔从出声孔中发出。壳体111内振膜后侧的位置设有用于传递声音的后腔(未示出)。后腔与另外一个声学孔(例如泄压孔)声学耦合，振膜后侧的声音可以通过后腔从泄压孔中发出。在一些实施例中，机芯可以包括机芯壳体111(未示出)，机芯壳体111与换能器的振膜限制形成换能器的前腔和后腔。需要知道的是，当振膜在振动时，振膜前侧和后侧可以同时产生一组具有相位差(例如，相位相反)的声音。当声音分别通过前腔和后腔后，会从与前腔声学耦合的出声孔和与后腔声学耦合的泄压孔的位置向外传播。在一些实施例中，可以通过设置前腔和后腔的结构，使得换能器在出声孔和泄压孔处输出的声音满足特定的条件。例如，可以设计前腔和后腔的长度，使得出声孔和泄压孔处可以输出一组具有特定相位关系(例如，相位相反)的声音。
在一些实施例中，发声部11可以具有彼此正交的长轴方向X、短轴方向Y和厚度方向Z。其中，长轴方向X可以定义为发声部11的二维投影面(例如，发声部11在其内侧面(靠近耳廓100的侧面)所在平面上的投影，或在矢状面上的投影)的形状中具有较大延伸尺寸的方向(例如，当投影形状为长方形或近似长方形时，长轴方向即为长方形或近似长方形的长度方向)。为便于说明，本说明书将以发声部在矢状面上的投影进行说明。短轴方向Y可以定义为发声部11在矢状面上投影的形状中垂直于长轴方向X的方向(例如，当投影形状为长方形或近似长方形时，短轴方向即为长方形或近似长方形的宽度方向)。厚度方向Z可以定义为垂直于矢状面的方向，例如，与冠状轴的方向一致，均指向身体左右的方向。
在一些实施例中，当用户佩戴耳机10时，发声部11可以固定于用户的耳道101附近但不堵塞耳道的位置。在一些实施例中，在佩戴状态下，耳机10在矢状面上的投影可以不覆盖用户的耳道。例如，发声部11在矢状面上的投影可以落在头部的左右两侧且在人体矢状轴上位于耳屏前侧的位置上(如，图2中实线框A所示的位置)。这时，发声部11位于用户的耳屏前侧，发声部11的长轴可以处于竖直或近似竖直状态，短轴方向Y在矢状面上的投影与矢状轴的方向一致，长轴方向X在矢状面上的投影与垂直轴方向一致，厚度方向Z垂直于矢状面。又例如，发声部11在矢状面上投影可以落在对耳轮105上(如，图2中的虚线框C所示的位置)。这时的发声部11至少部分位于对耳轮105处，发声部11的长轴处于水平或近似水平状态，发声部11的长轴方向X在矢状面 上的投影与矢状轴的方向一致，短轴方向Y在矢状面上的投影与垂直轴方向一致，厚度方向Z垂直于矢状面。如此，既可以避免发声部11遮挡耳道，进而解放用户的双耳；还可以增加发声部11与耳廓100之间的接触面积，进而改善耳机10的佩戴舒适性。
在一些实施例中，在佩戴状态下，耳机10在矢状面上的投影也可以覆盖或至少部分覆盖用户的耳道，例如，发声部11在矢状面上的投影可以落在耳甲腔102内。这时，发声部11至少部分位于耳甲腔102内，发声部11处于倾斜状态(如，图2中虚线框B所示的位置)，这时长轴方向X与短轴方向Y仍平行或近似平行于矢状面，发声部11的短轴方向Y在矢状面上的投影可与矢状轴的方向具有一定夹角，即短轴方向Y也相应倾斜设置，长轴方向X在矢状面上的投影可以与矢状轴的方向具有一定夹角，即长轴方向X也倾斜设置，厚度方向Z垂直于矢状面。此时，由于耳甲腔102具有一定的容积及深度，使得耳机10的内侧面与耳甲腔之间具有一定的间距，耳道可以通过内侧面与耳甲腔之间的泄漏结构与外界连通，进而解放用户的双耳。同时，发声部11与耳甲腔可以配合形成与耳道连通的辅助腔体(即后文提及的腔体结构)。在一些实施例中，出声孔可以至少部分位于前述辅助腔体中，出声孔导出的声音会受到前述辅助腔体的限制，即前述辅助腔体能够聚拢声音，使得声音能够更多地传播至耳道内，从而提高用户在近场听到的声音的音量和质量，从而改善耳机10的声学效果。
此外，发声部11的佩戴位置不限于图2中所示的位置A、B、C等，满足图1中示出的区域J、区域M1或区域M2即可。例如，发声部11整体或者部分结构可以位于耳轮脚109的前侧(例如，图1中虚线围成的区域J)。又例如，发声部11的整体或者部分结构可以与耳道101的上部(例如，耳轮脚109、耳甲艇103、三角窝104、对耳轮105、耳舟106、耳轮107等一个或多个部位所在的位置)接触。再例如，发声部11的整体或者部分结构可以位于耳廓100的一个或多个部位(例如，耳甲腔102、耳甲艇103、三角窝104等)所形成的腔体内(例如，图1中虚线围成的至少包含耳甲艇103、三角窝104的区域M1和与至少包含耳甲腔102的区域M2)。
关于上述耳机10的描述仅是出于阐述的目的，并不旨在限制本申请的范围。对于本领域的普通技术人员来说，可以根据本申请的描述，做出各种各样的变化和修改。例如，耳机10还可以包括电池组件、蓝牙组件等或其组合。电池组件可用于给耳机10供电。蓝牙组件可以用于将耳机10无线连接至其他设备(例如，手机、电脑等)。这些变化和修改仍处于本申请的保护范围之内。
图3是根据本说明书一些实施例所示的耳机的示例性结构图。请结合图2与图3，图2中所示为左耳侧，图3中所示为右耳侧。
如图3所示，耳挂12为与用户头部与耳廓100的交界处相贴合的弧状结构。发声部11(或发声部11的壳体111)可以具有与耳挂12连接的连接端CE和不与耳挂12连接的自由端FE。耳机10处于佩戴状态时，耳挂12的第一部分121挂设在用户耳廓100和头部之间，耳挂12的第二部分122向耳廓100背离头部的一侧延伸并与发声部11的连接端CE连接，以将发声部11至少部分地插入耳甲腔102，例如，发声部11的自由端FE可以伸入耳甲腔102内。也就是说，发声部11的壳体在矢状面上的投影与耳甲腔102在矢状面上的投影具有重叠的部分，例如，发声部11在矢状面上的投影可以落在耳甲腔102内。在佩戴状态下，耳机10在矢状面上的投影也可以覆盖或至少部分覆盖用户的耳道。此时，发声部11位于耳甲腔102及耳道101上方的M2区域(图1中示出)，发声部11的长轴方向X倾斜设置(如图2所示的位置B)。发声部11的长轴方向X与短轴方向Y仍平行或近似平行于矢状面，发声部11的短轴方向Y在矢状面上的投影可与矢状轴的方向具有一定夹角，即短轴方向Y也相应倾斜设置，长轴方向X在矢状面上的投影可以与矢状轴的方向具有一定夹角，即长轴方向X也倾斜设置，厚度方向Z垂直于矢状面。如此结构的耳挂12和发声部11与用户耳廓100适配度较好，能够增加耳机10从耳廓100上脱落的阻力，从而增加耳机10的佩戴稳定性。
在一些实施例中，在佩戴状态下，沿厚度方向Z观察，发声部11的连接端CE相较于自由端FE更靠近头顶，以便于自由端FE伸入耳甲腔内。基于此，短轴方向Y与人体矢状轴所在方向之间的夹角可以介于30°-40°之间。其中，如果前述夹角太小，容易导致自由端FE无法伸入耳甲腔内，以及发声部11上的出声孔与耳道相距太远；如果前述夹角太大，同样容易导致发声部11无法伸入耳甲腔内，以及耳道被发声部11堵住。换言之，如此设置，既允许发声部11伸入耳甲腔内，又使得发声部11上的出声孔与耳道具有合适的距离，以在耳道不被堵住的情况下，用户能够更多地听到发声部11产生的声音。
在一些实施例中，耳挂12的第一部分121包括电池仓13。电池仓13内设置有与发声部11电性连接的电池。在一些实施例中，电池仓13位于第一部分121上远离发声部11的一端，耳挂12 远离发声部11的末端的投影轮廓即为电池仓13的自由端在用户矢状面的投影轮廓。在一些实施例中，当用户佩戴耳机10时，发声部11和电池仓13可以分别位于耳廓的前侧和后侧。
在一些实施例中，继续参见图3，发声部11可以具有在佩戴状态下沿厚度方向Z朝向耳廓的内侧面和背离耳廓的外侧面OS，以及连接内侧面和外侧面OS的连接面。需要说明的是：在佩戴状态下，沿厚度方向Z观察，发声部11可以设置成圆形、椭圆形、圆角正方形、圆角矩形等形状。其中，当发声部11设置成圆形、椭圆形等形状时，上述连接面可以指发声部11的弧形侧面；而当发声部11设置成圆角正方形、圆角矩形等形状时，上述连接面可以包括后文中提及的下侧面LS、上侧面US和后侧面RS。因此，为了便于描述，本实施例以发声部11设置成圆角矩形为例进行示例性的说明。其中，发声部11在长轴方向X上的长度可以大于发声部11在短轴方向Y上的宽度。如图3所示，发声部11可以具有在佩戴状态下沿短轴方向Y背离耳道101的上侧面US和朝向耳道101的下侧面LS，以及连接上侧面US和下侧面LS的后侧面RS，后侧面RS在佩戴状态下位于长轴方向X朝向脑后的一端，并至少部分位于耳甲腔102内。其中，发声部11与自由端FE发声部11的自由端FE设置在后侧面RS上。
在一些实施例中，发声部11和耳挂12可以从耳甲腔所对应的耳廓100区域的前后两侧共同夹持前述耳廓100区域，从而增加耳机10从耳廓100上脱落的阻力，进而改善耳机10在佩戴状态下的稳定性。例如，发声部11的自由端FE在厚度方向Z上压持在耳甲腔内。在一些实施例中，自由端FE在长轴方向X和短轴方向Y上抵接在耳甲腔内(例如，自由端FE与耳甲腔内壁相抵接)。这里自由端FE可以是指沿Y-Z平面(短轴方向Y和厚度方向Z形成的平面)对发声部11进行切割，获取的远离连接端CE的特定区域，该特定区域长轴尺寸与发声部长轴尺寸的比值可以为0.05-0.2。
需要说明的是：在佩戴状态下，发声部11的自由端FE除了伸入耳甲腔内之外，也可以正投影落在对耳轮上，还可以正投影落在头部的左右两侧且在人体矢状轴上位于耳廓前侧的位置上。换言之，耳挂12可以支撑发声部11佩戴至耳甲腔、对耳轮、耳廓前侧等佩戴位。以下以图3所示的耳机10为例，对耳机10进行详细说明。需要知道的是，在不违背相应声学原理的情况下，图3的耳机10的结构以及其对应的参数也可以同样适用于上文中提到的其它构型的耳机中。
通过将发声部11至少部分伸入耳甲腔102内，可以提高听音位置(例如，耳道处)的听音音量，特别是中低频的听音音量，同时仍然保持较好的远场漏音相消的效果。仅作为示例性说明，发声部11的整体或部分结构伸入耳甲腔102内时，发声部11与耳甲腔102形成类似于腔体(以下简称为类腔体)的结构，在说明书实施例中，类腔体可以理解为由发声部11的侧面与耳甲腔102结构共同围成的半封闭结构，该半封闭结构使得内部与外部环境并非完全密闭隔绝，而是具有与外部环境声学连通的泄漏结构(例如，开口、缝隙、管道等)。用户在佩戴耳机10时，发声部11的壳体上靠近或朝向用户耳道的一侧可以设置一个或多个出声孔，发声部11的壳体的其它侧面(例如，远离或背离用户耳道的侧面)上设置一个或多个泄压孔，出声孔与耳机10的前腔声学耦合，泄压孔与耳机10的后腔声学耦合。以发声部11包括一个出声孔和泄压孔作为示例，出声孔输出的声音和泄压孔输出的声音可以近似视为两个声源，该两个声源的声波相位相反，发声部11和耳甲腔102对应的内壁形成类腔体结构，其中，出声孔对应的声源位于类腔体结构内，泄压孔对应的声源位于类腔体结构外，形成图4所示的声学模型。
图4是根据本说明书一些实施例所示的耳机形成的声学模型示意图。如图4所示，类腔体结构402中可以包含听音位置和至少一个声源401A。这里的“包含”可以表示听音位置和声源401A至少有一者在类腔体结构402内部，也可以表示听音位置和声源401A至少有一者在类腔体结构402内部边缘处。听音位置可以等效为耳廓耳道入口，也可以是耳廓声学参考点，如耳参考点(earreferencepoint，ERP)、鼓膜参考点(ear-drumreferencepoint，DRP)等，也可以是导向听音者的入口结构等。由于声源401A被类腔体结构402包裹，其辐射出来的声音大部分会通过直射或反射的方式到达听音位置。相对地，在没有类腔体结构402的情况，声源401A辐射出的声音大部分不会到达听音位置。因此，腔体结构的设置使得到达听音位置的声音音量得到显著提高。同时，类腔体结构402外的反相声源401B辐射出来的反相声音只有较少的一部分会通过类腔体结构402的泄漏结构403进入类腔体结构402中。这相当于在泄漏结构403处生成了一个次级声源401B'，其强度显著小于声源401B，亦显著小于声源401A。次级声源401B'产生的声音在腔体内对声源401A产生反相相消的效果微弱，使听音位置的听音音量显著提高。对于漏音来说，声源401A通过腔体的泄漏结构403向外界辐射声音相当于在泄漏结构403处生成了一个次级声源401A'，由于声源401A辐射的几乎所有声音均从泄漏结构403输出，且类腔体结构402尺度远小于评价漏音的空间 尺度(相差至少一个数量级)，因此可认为次级声源401A'的强度与声源401A相当。对于外界空间来说，次级声源401A'与声源401B形成双声源相消降漏音。
在具体应用场景中，发声部11的壳体外壁面通常为平面或曲面，而用户耳甲腔102的轮廓为凹凸不平的结构，通过将发声部11部分或整体结构伸入耳甲腔102内，发声部11与耳甲腔102的轮廓之间形成与外界连通的类腔体结构，进一步地，将出声孔设置在发声部11的壳体朝向用户耳道和靠近耳甲腔102边缘的位置(例如内侧面IS)，以及将泄压孔设置在发声部11背离或远离耳道的位置就可以构造图4所示的声学模型，从而使得用户在佩戴耳机10时能够提高用户在耳口处的听音位置，以及降低远场的漏音效果。
在一些实施例中，通过对耳挂12的形状、尺寸进行设计，可以提升耳挂12与用户耳朵的适配度，提升耳机10的佩戴稳定性与可调节性，同时还可以调控耳挂12将发声部11佩戴至用户耳廓的具体位置，改善耳机10的听音效果。
为了方便理解和描述耳机10在非佩戴状态或佩戴状态下的形态，可以将耳机10投影到特定平面上，并通过该平面上的投影形状有关的参数对耳机10进行描述。仅作为示例，在佩戴状态下，可以将耳机10投影在人体矢状面以形成相应的投影形状。在非佩戴状态下，可以参照人体矢状面与耳机10的相对位置关系，构建与人体矢状面类似的第一平面，使得耳机10在第一平面投影形成的投影形状接近耳机10在人体矢状面投影形成的投影形状。其中，第一平面可以通过如下方式确定：将耳挂12放置于平坦的支撑面(如水平桌面、地平面等)，耳挂12与支撑面接触并放置平稳时，该支撑平面即为此时耳机10对应的第一平面。当然，为了保持佩戴状态和非佩戴状态所对应的特定平面的统一性，第一平面还可以是人体矢状面，在一些实施例中，第一平面也是可以指耳挂12沿其长度延伸方向将其平分或大致平分的平分线所构成的平面。
图5是根据本说明书一些实施例所示的非佩戴状态下的耳机的结构示意图。图6是根据本说明书一些实施例所示的非佩戴状态下的耳机在第一平面上投影形成的第一投影。
结合图5和图6，在一些实施例中，第一投影包括外轮廓、第一端部轮廓、内轮廓和第二端部轮廓。第一端部轮廓可以是发声部11的自由端FE在第一平面上的投影轮廓，第一端部轮廓的两个端点P0和P1即为自由端FE与发声部11其它部分交界位置在第一平面的投影点，关于自由端FE的划分可以参见本说明书图3的相关描述。第二端部轮廓可以是耳挂12的末端BE在第一平面上的投影轮廓，第二端部轮廓的两个端点Q0和Q1即为末端BE与耳挂12其它部分交界位置在第一平面的投影点。外轮廓可以是第一投影位于点P1与点Q1之间的轮廓。内轮廓可以是第一投影位于点P0与点Q0之间的轮廓。
需要说明的是，耳挂12的末端BE可以是耳挂12的第一部分中远离第二部分的一端中的至少部分区域。耳挂12的第一部分远离第二部分的一端可以为形状规则或不规则的结构体，这里为了进一步说明耳挂12的末端BE，进行示例性说明。例如，耳挂12的第一部分远离第二部分的一端为长方体结构时，其端部壁面为平面，此时耳挂12的末端BE为耳挂12的第一部分远离第二部分的一端的端部侧面。又例如，耳挂12的第一部分远离第二部分的一端为球体、椭球体或不规则的结构体时，耳挂12的末端BE可以是在耳挂12的第一部分的延伸方向上，由远离第二部分的最远位置向第二部分延进特定距离后所获取的区域，该特定距离与耳挂12第一部分的总延伸距离的比值的取值范围可以为0.05-0.2。
以发声部11在第一平面60上的投影为类长方形(例如，跑道形)为例，发声部11的投影中存在平行或近似平行的上侧面投影和下侧面投影，以及连接上侧面投影和下侧面投影的第一端部轮廓，第一端部轮廓可以是直线段或圆弧，点P0和点P1分别表示第一端部轮廓两端。仅作为示例性说明，点P0可以是自由端FE投影形成的弧线与上侧面投影的线段的交界点，与点P0类似，点P1可以是自由端FE投影形成的弧线与下侧面投影的线段的交界点。相似的，耳挂远离发声部11的一端也具有自由端，耳挂的自由端在第一平面60的投影形成第二端部轮廓，第二端部轮廓可以是直线段或圆弧，点Q0和点Q1分别表示第二端部轮廓两端。在一些实施例中，点Q0和点Q1可以是耳挂的第一部分121在第一平面60上远离耳挂第二部分122的方向上的自由端投影的线段或弧线的两端点，进一步的，在发声部11的长轴方向X上，靠近发声部11的端点为点Q0，远离发声部11的端点为Q1。
耳机10在第一平面60和人体矢状面的投影形状能够反映耳机10在耳廓的佩戴方式。例如，第一投影的面积可以反映耳机10在佩戴状态下能够覆盖的耳廓的区域，以及发声部11和耳挂与耳廓的接触方式。在一些实施例中，由于发声部11与耳挂的第一部分121并未直接接触，第一投影中内轮廓、外轮廓、第一端部轮廓、第二端部轮廓形成一个非封闭的区域。该区域的大小与耳机 10的佩戴效果(例如，佩戴的稳定性、发声位置等)密切相关。为了方便理解，在一些实施例中，可以确定连接第一端部轮廓和第二端部轮廓的切线段50，将切线段50、内轮廓及第一端部轮廓共同界定出第一封闭曲线，第一封闭曲线围成的区域面积为第一面积。第一封闭曲线能够反映耳机10佩戴时，发声部11和耳挂12与耳廓的贴合程度。
考虑到发声部11与用户耳道(例如耳甲腔)的相对位置会影响发声部11与用户耳甲腔所构成的类腔体结构的泄漏结构的数量以及泄漏结构的开口大小，而该泄漏结构的开口大小会直接影响听音质量，具体表现为第一面积过大时，发声部11可能无法抵接耳甲腔的边缘，造成发声部11直接向外辐射的声音成分增多，到达听音位置的声音变少，进而导致发声部11的发声效率降低。在一些实施例中，考虑耳机10的整体结构，以及耳挂的形状需要适应耳廓和头部之间的空间等，第一封闭曲线的第一面积的范围在300mm2-500mm2之间。在一些实施例中，过小的第一面积会导致耳挂极值点与发声部11之间的距离过小，或耳挂与发声部在用户耳廓的夹紧力度过大，因此，在一些实施例中，第一面积不小于200mm2。综上，为了降低发声部11直接向外辐射的声音，保证耳机10在听音位置(例如，耳道口处)的听音音量，并提高用户佩戴时的舒适度，在一些实施例中，第一封闭曲线的第一面积的范围在250mm2-400mm2之间。
当设定第一封闭曲线的第一面积的范围在300mm2-500mm2之间时，需要进一步设定耳挂耳挂12本身的形状、尺寸，一方面使耳挂12能够与用户耳朵适配，提升耳机10的佩戴稳定性与可调节性，另一方面使与耳挂12连接的发声部11能够足够倾斜设置，以使发声部11的自由端FE能够位于耳甲腔102内，改善耳机10的听音效果。以下将结合图7涉及的第一曲线说明耳挂12的形状、尺寸。
图7是根据本说明书一些实施例所示的耳机在用户的矢状面的投影的第一曲线的示例性示意图。
在一些实施例中，如图7所示，可以将耳挂12在用户的矢状面的投影中的第一曲线L1作为耳挂12的参考曲线。在一些实施例中，由于耳机10在佩戴状态下，耳挂12与用户耳部接触的区域主要为耳挂12的内轮廓，因此第一曲线L1可以是耳挂12在用户矢状面的投影的内轮廓对应的参考曲线。在一些实施例中，在发声部11的投影的长轴方向X上，耳挂12在用户矢状面的投影的内轮廓对应曲线具有最左端(点P')以及最右端(点Q')，耳挂12在用户矢状面的投影的内轮廓位于点P'与点Q'之间的部分曲线即为第一曲线L1。点P'在耳挂12上实际对应的位置为点P，点Q'在耳挂12上实际对应的位置为点Q，如图3所示。通过对第一曲线L1的特征(例如极值点等)进行设计，可以确定耳挂12的形状、尺寸，从而一方面提升耳挂12与用户耳朵的适配度，提升耳机10的佩戴稳定性与可调节性，另一方面可以调控耳挂12将发声部11固定至用户耳部的具体位置，改善耳机10的听音效果。
当设定第一封闭曲线的第一面积的范围在300mm2-500mm2之间后，需要限定第一封闭曲线在发声部11投影的长轴方向上的尺寸。如果第一封闭曲线在发声部11投影的长轴方向上的尺寸过小，会导致耳挂12与发声部的连接端与其末端BE夹持用户耳廓过紧；如果第一封闭曲线在发声部11投影的长轴方向上的尺寸过大，会导致发声部11距离如下文所述的耳挂上顶点的距离过小，导致发声部11的自由端FE不能够位于耳甲腔102内。在一些实施例中，第一封闭曲线在发声部11投影的长轴方向上的尺寸可以以发声部11投影的长轴方向上第一曲线L1的最左端(点P')与最右端(点Q')之间的距离表征。在一些实施例中，在发声部11投影的长轴方向上，第一曲线L1的最左端(点P')与最右端(点Q')之间的距离范围为25mm-35mm。在一些实施例中，为了使耳机10具有较好的佩戴稳定性，在发声部11投影的长轴方向上，第一曲线L1的最左端(点P')与最右端(点Q')之间的距离范围为28mm-33mm。在一些实施例中，为使发声部11的自由端FE能够更加靠近耳甲腔102边缘，以使类腔体结构具有较大的体积，以提高发声部11的发声效率，在发声部11投影的长轴方向上，第一曲线L1的最左端(点P')与最右端(点Q')之间的距离范围为30mm-32mm。
请参照图7，在一些实施例中，可以以发声部11在矢状面的投影的长轴方向X为x轴，短轴方向Y为y轴，x轴与y轴的交点作为原点o，建立第一直角坐标系xoy，第一曲线L1可以看作是第一直角坐标系xoy中的曲线。
在一些实施例中，可以将y轴方向称为第一方向，即第一方向与发声部11在用户矢状面的投影的长轴方向X垂直，且朝向用户头顶的方向。在一些实施例中，在第一直角坐标系xoy内，第一曲线L1在第一方向具有极值点N'，通过设置极值点N'与耳挂12以及发声部11上其他位置点之间的位置关系可以调整耳机10的佩戴情况(例如，佩戴时的力学参数以及佩戴时发声部11相对 于耳部的位置)。请参照图3与图7，在一些实施例中，极值点N'位于耳挂12上顶点K(以上顶点K在用户的矢状面上的投影点K'表示)的后侧。也就是说，在用户矢状面内的耳挂12的投影上，相较于上顶点K的投影点K'，极值点N'的位置更靠近用户的脑后。
在一些实施例中，极值点N'在耳挂12上的对应点为点N，如图3所示。在一些实施例中，可以综合考虑耳挂12的耳挂平面(例如图11中的平面S1)与用户的矢状面之间的夹角，从而确定极值点N'在耳挂12上的对应点N。在一些实施例中，在佩戴状态下，耳挂平面与用户的矢状面可以平行。
在一些实施例中，耳挂12的上顶点K可以为佩戴状态下耳挂12的内轮廓沿用户垂直轴的最高点，如图3所示。在一些实施例中，当用户佩戴耳机10时，耳部可以主要通过耳挂12的上顶点K对耳机10形成支撑。在一些实施例中，耳挂12的上顶点K可以是佩戴状态下耳挂12内轮廓弯曲程度最大的位置，如图3与图7所示。在一些实施例中，耳挂12的上顶点K可以是佩戴状态下，耳挂12内轮廓上距离耳挂12末端(即第一部分121末端的自由端，耳挂12未与发声部11连接的一端)最远的点，如图3与图7所示。在一些实施例中，耳挂12的上顶点K的位置可以同时满足上述三个位置中的一个或多个。
如图3所示，耳机10在佩戴状态下发声部11需要伸入耳甲腔，耳挂极值点N与上顶点K之间在发声部11的长轴方向X上的间距可以影响发声部11伸入耳甲腔的程度以及发声部11在耳甲腔内的朝向，从而影响发声部11伸入耳甲腔构成的类腔体的结构。
当耳挂极值点N与上顶点K之间在发声部11的长轴方向X上的间距过大时，会导致耳挂12的第一部分121与耳部的贴合变差而降低耳机10的佩戴稳定性，或者，会导致发声部11在耳甲腔102内的朝向(例如，长轴方向X)过于接近垂直轴，发声部11的上侧面US与耳甲腔之间的缝隙过大，即形成的类腔体开口过大，被包含的声源(即位于内侧面IS上的出声孔)直接向环境中辐射的声音成分较多，到达听音位置的声音较小，同时外面声源进入类腔体的声音会增多，导致近场声音相消，进而导致听音效果变差。
当耳挂极值点N与上顶点K之间在发声部11的长轴方向X上的间距过小时，会导致发声部11在耳甲腔内的朝向(例如，长轴方向X)与垂直轴之间的夹角过大，发声部11的上侧面US与耳甲腔之间的缝隙过小或数量过少，导致形成的类腔体开口过小或过少，降漏音效果较差。且当上述距离过小时，发声部11的上侧面US可能与耳甲腔的内壁抵接，甚至可能会过度挤压用户的耳甲腔，使用户感到不适，影响耳机10的佩戴舒适度。
因此，为使发声部11能够抵接到耳甲腔的边缘，同时使发声部11的内侧面及其上设置的出声孔能够正对耳道设置，提高发声部11的发声效率，并使发声部11与用户耳甲腔所构成的类腔体结构的泄漏结构的数量以及泄漏结构的开口大小适量，以保证降漏音效果，且保证耳机10的佩戴舒适度，可以同时限制耳挂12的内轮廓形成的投影面积及耳挂12的尺寸。在一些实施例中，当设定第一封闭曲线的第一面积的范围在200mm2-500mm2之间时，在耳挂12在用户矢状面的投影上，沿发声部11的长轴方向X上，极值点N'与上顶点K的投影点K'之间的距离可以为6mm-15mm。在一些实施例中，由于x轴与发声部11的长轴方向X平行，因此极值点N'与上顶点K的投影点K'之间沿发声部11投影的长轴方向X上的距离，可以为极值点N'的横坐标与顶点K的投影点K'的横坐标之间的距离。在一些实施例中，为了获得更好的听音效果，当设定第一封闭曲线的第一面积的范围在250mm2-450mm2之间时，沿发声部11的投影的长轴方向X上，极值点N'与耳挂12上顶点K在用户矢状面上的投影点K'之间的距离可以为7mm-12mm。在一些实施例中，为了进一步提高降漏音效果，当设定第一封闭曲线的第一面积的范围在300mm2-400mm2之间时，沿发声部11的投影的长轴方向X上，极值点N'与耳挂12上顶点K在用户矢状面上的投影点K'之间的距离可以为8mm-11mm。
需要说明的是，对耳机10在用户的矢状面上的投影上的相关距离及角度的测量方法，可以为：对于耳机10，拍摄一张与投影面(用户的矢状面)相平行的照片，在照片上测量相关的距离及角度，再根据照片的比例尺进行换算，即可得到投影面上的相关距离及角度的实际数据。
在一些实施例中，除了通过上述投影点的距离反映耳挂极值点N与上顶点K之间的距离，也可以在耳挂12上进行实测。在一些实施例中，当设定第一封闭曲线的第一面积的范围在200mm2-500mm2之间时，耳挂极值点N与上顶点K之间的距离可以为6mm-12mm。在一些实施例中，为了进一步提高降漏音效果，当设定第一封闭曲线的第一面积的范围在250mm2-450mm2之间时，在耳挂12上，耳挂极值点N与上顶点K之间的距离可以为7mm-11mm。在一些实施例中，为了使得发声部11与耳甲腔形成的类腔体结构具有更合适的体积和开口大小/数量，当设定第一封闭曲线的第一 面积的范围在300mm2-450mm2之间时，在耳挂12上，耳挂极值点N与上顶点K之间的距离可以为8mm-11mm。
当限定耳挂12相关形状、尺寸后，为保证发声部11能够插入耳甲腔内，需进一步限定发声部11相对于耳廓及耳甲腔的佩戴角度。在一些实施例中，为了使得发声部11的整部或部分区域伸入耳甲腔中，并提高发声部11覆盖耳甲腔的面积，耳机10在佩戴状态下，如图7所示，发声部11投影的长轴方向X与水平方向(即图7所示矢状轴方向)的倾角α范围可以为13°-21°。在一些实施例中，为了减小发声部11与耳甲腔边缘之间形成的缝隙尺寸，提高耳道的听音音量，发声部11投影的长轴方向X与水平方向(即图7所示矢状轴方向)的倾角α范围可以为15°-20°。在一些实施例中，发声部11投影的长轴方向X与水平方向(即图7所示矢状轴方向)的倾角α范围可以为15°-18°。
当设定第一封闭曲线的第一面积的范围在300mm2-500mm2之间后，需要限定第一封闭曲线在发声部11投影的短轴方向(即第一方向)上的距离。第一封闭曲线在发声部11投影的第一方向上的距离影响发声部11与耳甲腔的位置，若该距离过小，会导致发声部11无法伸入耳甲腔，若该距离过大，会导致发声部11与耳甲腔之间的缝隙尺寸过大，使得听音效果不佳。在一些实施例中，第一封闭曲线在发声部11投影的第一方向上的距离可以以第一方向上极值点N'与第一曲线L1的最左端(点P')之间的距离表征。在一些实施例中，为保证发声部11能够伸入耳甲腔内，在第一方向上，极值点N'与第一曲线L1的最左端(点P')之间的距离范围为20mm-25mm。在一些实施例中，为了使发声部11与耳甲腔之间的缝隙尺寸适度，极值点N'与第一曲线L1的最左端(点P')之间的距离范围为20mm-23mm。在一些实施例中，为保证耳机的佩戴舒适度，极值点N'与第一曲线L1的最左端(点P')之间的距离范围为20mm-22mm。
类似地，在一些实施例中，第一封闭曲线在发声部11投影的第一方向上的距离可以以第一方向上上顶点K的投影点K'与第一曲线L1的最左端(点P')之间的距离表征。在一些实施例中，为保证发声部11能够伸入耳甲腔内，在第一方向上，上顶点K的投影点K'与第一曲线L1的最左端(点P')之间的距离范围为17mm-22mm。在一些实施例中，为了使发声部11与耳甲腔之间的缝隙尺寸适度，上顶点K的投影点K'与第一曲线L1的最左端(点P')之间的距离范围为17mm-20mm。在一些实施例中，为保证耳机的佩戴舒适度，上顶点K的投影点K'与第一曲线L1的最左端(点P')之间的距离范围为18mm-20mm。
图8A与图8B是根据本说明书一些实施例所示的耳机的质心的示例性位置结构示意图。
如图8A与图8B所示，在一些实施例中，耳机10的质心位置为点F。在一些实施例中，受发声部11的内部结构(如磁路、电路板等)影响，耳机10中发声部11的质量较大，因此，耳机10的质心F的位置与发声部11的质心的H位置接近，或受发声部11质量影响较大，即耳机10的质心F的位置一定程度上可以表示发声部11的位置。为了便于说明，以下通过耳机10的质心F与发声部11的相对位置，对耳机10的质心F的具体位置进行详细描述。
请参照图8A，在一些实施例中，在XY平面上，耳机10的质心F点与发声部11的下侧面LS之间的距离可以为2mm-6mm。在一些实施例中，在XY平面上，耳机10的质心F点与发声部11的下侧面LS之间的距离可以为3mm-5mm。在一些实施例中，在XY平面上，耳机10的质心F点与发声部11的下侧面LS之间的距离可以为4mm-4.5mm。
在一些实施例中，在XY平面上，耳机10的质心F点与发声部11的长轴(即x轴)之间的距离可以为1mm-3mm。在一些实施例中，在XY平面上，耳机10的质心F点与发声部11的长轴(即x轴)之间的距离可以为1.5mm-2.8mm。在一些实施例中，在XY平面上，耳机10的质心F点与发声部11的长轴(即x轴)之间的距离可以为2mm-2.5mm。
在一些实施例中，在XY平面上，耳机10的质心F点与发声部11的自由端FE(即后侧面RS)之间的距离可以为4mm-8mm。在一些实施例中，在XY平面上，耳机10的质心F点与发声部11的自由端FE(即后侧面RS)之间的距离可以为5mm-7mm。在一些实施例中，在XY平面上，耳机10的质心F点与发声部11的自由端FE(即后侧面RS)之间的距离可以为6mm-6.8mm。
请参照图8B，在一些实施例中，在XZ平面上，耳机10的质心F点与发声部11的内侧面IS之间的距离可以为2mm-6mm。在一些实施例中，在XZ平面上，耳机10的质心F点与发声部11的内侧面IS之间的距离可以为3mm-5mm。在一些实施例中，在XZ平面上，耳机10的质心F点与发声部11的内侧面IS之间的距离可以为4.5mm-4.8mm。
在一些实施例中，通过对耳机10的质心F、上顶点K以及耳挂极值点N的位置进行设计，可以提升耳机10的佩戴稳定性与可调性。在一些实施例中，由于耳部主要通过耳挂12的上顶点K 对耳机10形成支撑，因此在用户佩戴耳机10时，可以视为形成以上顶点K为支撑点的“支撑杠杆”。在佩戴状态下，耳机10的质心F位于上顶点K后侧(即靠近用户脑后的一侧)，可以避免耳机10在佩戴状态下具有向前(即远离用户脑后的方向)翻转的趋势，从而提升耳机10的佩戴稳定性。在一些实施例中，耳挂极值点N处可以是耳挂12上横截面最小的位置，以使得耳挂12在耳挂极值点N处更易发生变形，由此，在用户佩戴耳机10时，耳挂12的第一部分121以及发声部11会以耳挂极值点N为支点形成类似“夹紧力杠杆”的结构而夹持于用户耳部两侧(例如耳甲腔的前后两侧)。为了提高“支撑杠杆”和“夹紧力杠杆”的稳定性，耳机10的质心F与上顶点K分别位于耳挂极值点N的两侧。以下将进一步对质心F、上顶点K以及耳挂极值点N的位置进行详细描述。
由于耳机10的质心F的位置受发声部11位置的影响较大，在耳挂12总体体积变化不大的情况下，上顶点K与耳机10的质心F之间的位置一定程度体现了耳机10佩戴时发声部11在耳部的相对位置。具体表现为，当耳机10的质心位置F与耳挂12的上顶点K的距离过大时，在用户佩戴耳机10时，发声部11的位置可能更加靠近用户的耳道口，导致发声部11在耳甲腔内的位置偏下，发声部11的上侧面US与耳甲腔之间的缝隙过大，导致听音效果较弱。当耳机10的质心位置F与耳挂12的上顶点K的距离过小时，发声部11的上侧面US与耳甲腔的上边缘贴合，上侧面US与耳甲腔之间的缝隙太小或数量太少，导致降漏音效果差，且发声部11上的出声孔与外耳道相距太远，对听音效果造成不利影响。
如图6所示，在一些实施例中，在耳机10在用户的矢状面的投影上，为了获得更好的听音效果，上顶点K的投影点K'与耳机10的质心F的投影点F'之间的距离可以为22mm-35mm。在一些实施例中，为了进一步提高降漏音效果，在耳机10在用户的矢状面的投影上，上顶点K的投影点K'与耳机10的质心F的投影点F'之间的距离可以为25mm-30mm。在一些实施例中，为了使得发声部11与耳甲腔形成的类腔体结构具有更合适的体积和开口大小/数量，在耳机10在用户的矢状面的投影上，上顶点K的投影点K'与耳机10的质心F的投影点F'之间的距离可以为27mm-29mm。
在一些实施例中，为了获得较好的听音效果，在耳机10上，上顶点K与耳机10的质心F之间的距离可以为20mm-38mm。在一些实施例中，为了进一步提高降漏音效果，在耳机10上，上顶点K与耳机10的质心F之间的距离可以为25mm-32.5mm。在一些实施例中，为了使得发声部11与耳甲腔形成的类腔体结构具有更合适的体积和开口大小/数量，在耳机10上，上顶点K与耳机10的质心F之间的距离可以为27mm-30mm。
在一些实施例中，耳机10的质心F与耳挂12的上顶点K之间的连线与发声部11的长轴方向X之间的夹角α1会影响耳机10在佩戴状态下的稳定性。当耳机10的质心F与耳挂12的上顶点K之间的连线与发声部11的长轴方向X之间的夹角α1过大时，会导致发声部11的自由端FE距离用户耳甲腔的侧面较远，发声部11对耳甲腔的夹持较弱，佩戴不稳定。当耳机10的质心F与耳挂12的上顶点K之间的连线与发声部11的长轴方向X之间的夹角α1过小时，发声部11的自由端FE与用户耳甲腔的配合过紧，影响耳机10的佩戴舒适性，降低耳机10的可调节性。
在一些实施例中，为了使耳机10具有较高的佩戴稳定性与可调节性，在耳机10在用户的矢状面的投影上，上顶点K的投影点K'与耳机10的质心F的投影点F'之间的连线K'F'与发声部11的投影的长轴方向X(即x轴方向)之间的夹角α1范围可以为35°-60°。需要说明的是，上顶点K的投影点K'与耳机10的质心F的投影点F'之间的连线K'F'与发声部11的投影的长轴方向X(即x轴方向)之间的夹角α1，是指以x轴正方向为基准，逆时针方向上连线K'F'与x轴的夹角，如图6所示。在一些实施例中，为了进一步提升耳机10的佩戴稳定性，上顶点K的投影点K'与耳机10的质心F的投影点F'之间的连线K'F'与发声部11的投影的长轴方向X(即x轴方向)之间的夹角α1范围可以为40°-55°。在一些实施例中，为了进一步提升耳机10的可调节性，上顶点K的投影点K'与耳机10的质心F的投影点F'之间的连线K'F'与发声部11的投影的长轴方向X(即x轴方向)之间的夹角α1范围可以为45°-50°。
在一些实施例中，除了通过上述投影点的位置反映耳机10的质心F与上顶点K之间的连线与发声部11的长轴方向X之间的夹角α1，也可以在耳挂12上进行实测。在一些实施例中，为了使耳机10具有较高的佩戴稳定性与可调节性，耳机10的质心F与耳挂12的上顶点K之间的连线与发声部11的长轴方向X之间的夹角α1可以为30°-55°。在一些实施例中，为了进一步提升耳机10的佩戴稳定性，耳机10的质心F与耳挂12的上顶点K之间的连线与发声部11的长轴方向X之间的夹角α1可以为40°-50°。在一些实施例中，为了进一步提升耳机10的可调节性，耳机10的质心F与耳挂12的上顶点K之间的连线与发声部11的长轴方向X之间的夹角α1可以为45°- 48°。
如图3与图8A、图8B所示，在一些实施例中，耳机10的质心F在用户的矢状面上的投影点为点F'。参考图8A、图8B，在一些实施例中，耳机10在非佩戴状态下，耳机10的质心F与耳挂的极值点的距离也与佩戴时稳定性以及用户耳部与头部连接位置的异物感有关。在一些实施例中，当耳机10的质心F与耳挂极值点N的距离过大时，耳机10在耳部的夹持位置可能过低，可能出现佩戴时发声部11与耳甲腔贴合程度不佳，进而影响类腔体结构并导致佩戴不稳定，使得发声部11与耳甲腔形成的类腔体的缝隙过大，从而使听音效果变差。当耳机10的质心F与耳挂极值点N的距离过小时，说明前述“夹紧力杠杆”支点两端的力臂可能过小，在夹持力不变的情况下，会导致杠杆结构稳定性较差，耳机10在佩戴状态下，可能出现佩戴不稳定的情况。
在一些实施例中，为了使耳机10在佩戴状态下具有较高的佩戴稳定性的同时还具有较好的听音效果，在耳机10在用户的矢状面的投影上，极值点N'点与耳机10的质心F的投影点F'之间的距离可以为20mm-35mm。在一些实施例中，为了进一步提升耳机10的佩戴稳定性，在耳机10在用户的矢状面的投影上，极值点N'点与耳机10的质心F的投影点F'之间的距离可以为25mm-30mm。在一些实施例中，为了进一步提升听音效果，在耳机10在用户的矢状面的投影上，极值点N'点与耳机10的质心F的投影点F'之间的距离可以为27mm-28mm。
在一些实施例中，为了使耳机10在佩戴状态下具有较高的佩戴稳定性的同时还具有较好的听音效果，在耳机10上，耳机10的质心F与耳挂极值点N之间的距离可以为18mm-40mm。在一些实施例中，为了进一步提升佩戴稳定性，在耳机10上，耳机10的质心F与耳挂极值点N之间的距离可以为24mm-31mm。在一些实施例中，为了进一步提升听音效果，耳机10的质心F与耳挂极值点N之间的距离可以为26mm-29mm。
在一些实施例中，如图7所示，在耳机10在用户的矢状面的投影上，极值点N'与耳机10的质心的投影点F'之间的连线N'F'与发声部11的投影的长轴方向X(即x轴方向)之间的第一夹角α2范围可以小于90°，从而使得耳机10的质心F的投影点F'在发声部11的长轴方向X上位于极值点N'的后侧。由于耳机10的质心F主要受发声部11的质量影响，因此质心F的位置一定程度上也反映了发声部11对耳甲腔的夹持位置，即发声部11对耳甲腔的夹持位置相较于耳挂极值点N更靠近用户的脑后，以进一步增强前述“夹紧力杠杆”的稳定性。需要说明的是，极值点N'与耳机10的质心的投影点F'之间的连线N'F'与发声部11的投影的长轴方向X(即x轴方向)之间的第一夹角α2，是指以x轴正方向为基准，逆时针方向上连线N'F'与x轴的夹角，如图7所示。
在一些实施例中，耳机10的质心F与耳挂极值点N的连线与发声部11的长轴方向X之间的第一夹角α2的大小一定程度上决定了耳机10内轮廓的形态，而内轮廓的形态与用户佩戴感相关。具体的，为了保证用户在佩戴该耳机10时，耳挂与用户耳部或头部的贴合，该夹角过大或过小均可能会导致佩戴时的形态改变，影响贴合的同时，可能无法形成图4所示的类腔体结构，影响发声部11的发声效率。具体地，当耳机10的质心F与耳挂极值点N的连线与发声部11的长轴方向X之间的第一夹角α2过大时，发声部11的夹持位置相对于耳甲腔过于靠下，上侧面US与耳甲腔之间的缝隙过大，导致听音效果较弱。当耳机10的质心F与耳挂极值点N的连线与发声部11的长轴方向X之间的第一夹角α2过小时，发声部11的夹持位置相对于耳甲腔过于靠上，上侧面US与耳甲腔的上边缘贴合，上侧面US与耳甲腔之间的缝隙太小或数量太少，导致降漏音效果差。由于用户耳甲腔的空间有限，发声部11的夹持位置相对于耳甲腔过于靠下或过于靠上，均容易使耳机10因受耳甲腔的形状限制而难以稳定夹持在用户的耳部。
在一些实施例中，为了获得较好的听音效果，极值点N'点与耳机10的质心F的投影点F'之间的连线N'F'与发声部11的投影的长轴方向X(即x轴方向)之间的第一夹角α2范围可以为60°-80°。在一些实施例中，为了进一步提高降漏音效果，极值点N'点与耳机10的质心F的投影点F'之间的连线N'F'与发声部11的投影的长轴方向X(即x轴方向)之间的第一夹角α2范围可以为60°-75°。在一些实施例中，为了使得发声部11与耳甲腔形成的类腔体结构具有更合适的体积和开口大小/数量，并使发声部11的夹持位置位于耳甲腔内的较佳位置，极值点N'点与耳机10的质心F的投影点F'之间的连线N'F'与发声部11的投影的长轴方向X(即x轴方向)之间的第一夹角α2范围可以为65°-70°。
在一些实施例中，除了通过上述投影点的位置反映耳机10的质心F与耳挂极值点N的连线与发声部11的长轴方向X之间的第一夹角α2，也可以在耳挂12上进行实测。在一些实施例中，为了获得更好的听音效果，在耳机10上，耳机10的质心F与耳挂极值点N的连线与发声部11的长轴方向X之间的第一夹角α2范围可以为50°-90°。在一些实施例中，为了进一步提高降漏音效 果，在耳机10上，耳机10的质心F与耳挂极值点N的连线与发声部11的长轴方向X之间的第一夹角α2范围可以为55°-85°。在一些实施例中，为了使得发声部11与耳甲腔形成的类腔体结构具有更合适的体积和开口大小/数量，并使发声部11的夹持位置位于耳甲腔内的较佳位置，在耳机10上，耳机10的质心F与耳挂极值点N的连线与发声部11的长轴方向X之间的第一夹角α2范围可以为60°-75°。
在一些实施例中，除了可以设置耳机10的质心F的位置，还可以直接设置发声部11的质心H的位置，以改善耳机10的佩戴稳定性和听音效果。如图3与图4所示，在一些实施例中，发声部11的质心H在用户的矢状面上的投影点可以与发声部11在用户的矢状面上的投影的形心重合。在一些实施例中，在耳机10上，通过改变发声部11的质心H与耳挂极值点N之间的距离，可以同时改变佩戴状态下发声部11在耳甲腔中的覆盖位置，以及发声部11夹持耳甲腔的夹持位置，不仅能够影响用户佩戴耳机10的稳定性、舒适度，还能够影响耳机10的听音效果。
当发声部11的形状、尺寸一致时，如果发声部11的质心H与耳挂极值点N之间的距离过大，会导致发声部11在耳甲腔内的位置偏下，发声部11的上侧面US与耳甲腔之间的缝隙过大，导致听音效果变差。而且，如果发声部11的质心H与耳挂极值点N之间的距离太大，会造成发声部11(或者耳挂12与发声部11的连接区域)与耳屏之间形成过多的干涉，导致发声部11过于挤压耳屏，影响佩戴的舒适度。
当发声部11的形状、尺寸一致时，如果发声部11的质心H与耳挂极值点N之间的距离太小，会导致发声部11的上侧面US与耳甲腔上边缘贴合，上侧面US与耳甲腔之间的缝隙太小或数量太少，甚至使得内部与外部环境完全密闭隔绝，无法形成类腔体的结构。而且，如果发声部11的质心H与耳挂极值点N之间的距离太小，会造成发声部11(或者耳挂12与发声部的连接区域)过于挤压耳部的外轮廓，也会影响佩戴的舒适度。
在一些实施例中，发声部11的质心H在用户矢状面上的投影点以及发声部11在用户的矢状面上的投影的形心为点H'，且点H'位于发声部11的投影的长轴上，即点H'位于x轴上。在一些实施例中，为了使得耳机10在佩戴状态下具有更好的听音效果，极值点N'与发声部11质心H在用户的矢状面上的投影点H'之间的距离可以为20mm-30mm。在一些实施例中，为了进一步提高降漏音效果，极值点N'与发声部11质心H在用户的矢状面上的投影点H'之间的距离可以为22mm-26mm。在一些实施例中，为了使得发声部11与耳甲腔形成的类腔体结构具有更合适的体积和开口大小/数量，并使发声部11的夹持位置位于耳甲腔内的较佳位置，极值点N'与发声部11质心H在用户的矢状面上的投影点H'之间的距离可以为23mm-25mm。
在一些实施例中，除了通过上述投影点的距离反映发声部11的质心H与耳挂极值点N之间的距离，也可以在耳挂12上进行实测。在一些实施例中，在耳机10上，为了使得耳机10在佩戴状态下具有更好的听音效果，发声部11的质心H与耳挂极值点N之间的距离可以为20mm-30mm。在一些实施例中，为了进一步提高降漏音效果，在耳机10上，发声部11的质心H与耳挂极值点N之间的距离可以为24mm-26mm。在一些实施例中，为了使得发声部11与耳甲腔形成的类腔体结构具有更合适的体积和开口大小/数量，并使发声部11的夹持位置位于耳甲腔内的较佳位置，在耳机10上，发声部11的质心H与耳挂极值点N之间的距离可以为24mm-26mm。
在一些实施例中，发声部11的质心H与耳挂极值点N之间的连线与发声部11的长轴方向X之间的第二夹角α3可以影响发声部11伸入耳甲腔的位置。当发声部11的质心H与耳挂极值点N之间的连线与发声部11的长轴方向X之间的第二夹角α3过大时，发声部11在耳甲腔内的位置偏下，发声部11的上侧面US与耳甲腔之间的缝隙过大，导致听音效果较弱。当发声部11的质心H与耳挂极值点N之间的连线与发声部11的长轴方向X之间的第二夹角α3过小时，发声部11的上侧面US与耳甲腔的上边缘贴合，上侧面US与耳甲腔之间的缝隙太小或数量太少，导致降漏音效果差。
在一些实施例中，极值点N'点与发声部11的质心H的投影点H'之间的连线N'H'与发声部11的投影的长轴方向X(即x轴方向)之间的第二夹角α3范围可以小于90°，从而使得发声部11的质心H的投影点H'在发声部11的长轴方向X上位于极值点N'的后侧，即发声部11的质心H相较于极值点N'在耳挂12上的对应点N更靠近用户的脑后，以进一步增强前述“夹紧力杠杆”的稳定性。需要说明的是，极值点N'与发声部11的质心的投影点H'之间的连线N'H'与发声部11的投影的长轴方向X(即x轴方向)之间的第二夹角α3，是指以x轴正方向为基准，逆时针方向上连线N'H'与x轴的夹角，如图4所示。
在一些实施例中，为了获得较好的听音效果，极值点N'点与发声部11的质心H的投影点 H'之间的连线N'H'与发声部11的投影的长轴方向X(即x轴方向)之间的第二夹角α3范围可以为65°-85°。在一些实施例中，为了进一步提高降漏音效果，极值点N'点与发声部11的质心H的投影点H'之间的连线N'H'与发声部11的投影的长轴方向X(即x轴方向)之间的第二夹角α3范围可以为70°-80°。在一些实施例中，为了使得发声部11与耳甲腔形成的类腔体结构具有更合适的体积和开口大小/数量，并使发声部11的夹持位置位于耳甲腔内的较佳位置，极值点N'点与发声部11的质心H的投影点H'之间的连线N'H'与发声部11的投影的长轴方向X(即x轴方向)之间的第二夹角α3范围可以为75°-79°。
在一些实施例中，除了通过上述投影点的位置反映发声部11的质心H与耳挂极值点N之间的连线与发声部11的长轴方向X之间的第二夹角α3，也可以在耳挂12上进行实测。在一些实施例中，为了获得较好的听音效果，在耳机10上，发声部11的质心H与耳挂极值点N之间的连线与发声部11的长轴方向X之间的第二夹角α3范围可以为70°-85°。在一些实施例中，为了进一步提高降漏音效果，在耳机10上，发声部11的质心H与耳挂极值点N之间的连线与发声部11的长轴方向X之间的第二夹角α3范围可以为75°-80°。在一些实施例中，为了使得发声部11与耳甲腔形成的类腔体结构具有更合适的体积和开口大小/数量，并使发声部11的夹持位置位于耳甲腔内的较佳位置，在耳机10上，发声部11的质心H与耳挂极值点N之间的连线与发声部11的长轴方向X之间的第二夹角α3范围可以为77°-80°。
在一些实施例中，在用户的矢状面上，极值点N'与耳机10的质心F的投影点F'之间的连线N'F'与发声部11的投影的长轴方向X(即x轴方向)之间的第一夹角α2小于极值点N'点与发声部11的质心H的投影点H'之间的连线N'H'与发声部11的投影的长轴方向X(即x轴方向)之间的第二夹角α3。即，连线N'F'与x轴的第一夹角α2小于连线N'H'与x轴的第二夹角α3，从而使得耳机10的质心F在发声部11的长轴方向X上位于发声部11的质心H的后侧，即耳机10的质心F相较于发声部11的质心H更靠近用户的脑后。通过上述设置，可以使得耳机10在佩戴状态下耳挂12可以更好地对用户耳朵进行夹紧，进一步增强前述“夹紧力杠杆”的稳定性。
在一些实施例中，耳挂极值点N与发声部11的质心H之间的连线与耳挂12的平面S1(也称为耳挂平面S1)之间的夹角α4可以影响耳机10在佩戴状态下发声部11插入用户耳甲腔的程度。若是耳挂极值点N与发声部11的质心H之间的连线与耳挂12的平面之间的夹角α4过小，会导致发声部11过于深入耳甲腔，发声部11的位置可能过于靠近用户的耳道口，此时耳道口相当于被一定程度上堵塞，无法实现耳道口与外界环境之间的连通，起不到耳机10自身的设计初衷。若是耳挂极值点N与发声部11的质心H之间的连线与耳挂12的平面之间的夹角α4过大，会影响发声部11伸入耳甲腔(例如，造成发声部11与耳甲腔之间的缝隙过大)，进而影响发声部11的听音效果。
图9是根据本说明书另一些实施例所示的耳机的耳挂的质心的示意图。
参考图9，在一些实施例中，为了保证耳机10佩戴时的舒适性，需要考虑耳挂重量的分布。为了减轻耳挂的支点(例如，极值点或上顶点)对耳廓的压迫感，可以将耳挂的质心位置(如点M)设置在发声部11附近。如此方式，在发声部11伸入耳甲腔后，耳甲腔可以同时支撑发声部11和耳挂的部分重量，减少耳挂的支点对耳廓的压迫感。这里所述的耳挂的质心是指耳挂整体(包括电池仓13但不包括发声部11)的质心。如图9所示，点T5为第一投影的外轮廓在发声部11长轴方向上位于最末端的点。在一些实施例中，考虑到耳挂和发声部11间的重量关系，在发声部11长轴方向上，耳挂的质心位置与点T5的距离L3在22mm-49mm之间。在一些实施例中，为了使得耳挂的质心位置靠近发声部11上与耳甲腔边缘的接触区域(以便耳甲腔更好地对耳挂进行支撑)，耳挂的质心位置与点T5的距离L3在25mm-25mm之间。
在一些实施例中，如图3所示，除了可以设置耳机10的质心F的位置，还可以直接设置发声部11的质心H的位置，以改善耳机10的佩戴稳定性和听音效果。如图3与图4所示，在一些实施例中，发声部11的质心H在用户的矢状面上的投影点可以与发声部11在用户的矢状面上的投影的形心重合。在一些实施例中，在耳机10上，通过改变发声部11的质心H与耳挂极值点N之间的距离，可以同时改变佩戴状态下发声部11在耳甲腔中的覆盖位置，以及发声部11夹持耳甲腔的夹持位置，不仅能够影响用户佩戴耳机10的稳定性、舒适度，还能够影响耳机10的听音效果。
当发声部11的形状、尺寸一致时，如果发声部11的质心H与耳挂极值点N之间的距离过大，会导致发声部11在耳甲腔内的位置偏下，发声部11的上侧面US与耳甲腔之间的缝隙过大，导致听音效果变差。而且，如果发声部11的质心H与耳挂极值点N之间的距离太大，会造成发声部11(或者耳挂12与发声部11的连接区域)与耳屏之间形成过多的干涉，导致发声部11过于挤压耳屏，影响佩戴的舒适度。
当发声部11的形状、尺寸一致时，如果发声部11的质心H与耳挂极值点N之间的距离太小，会导致发声部11的上侧面US与耳甲腔上边缘贴合，上侧面US与耳甲腔之间的缝隙太小或数量太少，甚至使得内部与外部环境完全密闭隔绝，无法形成类腔体的结构。而且，如果发声部11的质心H与耳挂极值点N之间的距离太小，会造成发声部11(或者耳挂12与发声部的连接区域)过于挤压耳部的外轮廓，也会影响佩戴的舒适度。
在一些实施例中，如图7所示，发声部11的质心H在用户矢状面上的投影点以及发声部11在用户的矢状面上的投影的形心为点H'，且点H'位于发声部11的投影的长轴上，即点H'位于x轴上。在一些实施例中，为了使得耳机10在佩戴状态下具有更好的听音效果，极值点N'与发声部11质心H在用户的矢状面上的投影点H'之间的距离可以为20mm-30mm。在一些实施例中，为了进一步提高降漏音效果，极值点N'与发声部11质心H在用户的矢状面上的投影点H'之间的距离可以为22mm-26mm。在一些实施例中，为了使得发声部11与耳甲腔形成的类腔体结构具有更合适的体积和开口大小/数量，并使发声部11的夹持位置位于耳甲腔内的较佳位置，极值点N'与发声部11质心H在用户的矢状面上的投影点H'之间的距离可以为23mm-25mm。
在一些实施例中，除了通过上述投影点的距离反映发声部11的质心H与耳挂极值点N之间的距离，也可以在耳挂12上进行实测。在一些实施例中，在耳机10上，为了使得耳机10在佩戴状态下具有更好的听音效果，发声部11的质心H与耳挂极值点N之间的距离可以为20mm-30mm。在一些实施例中，为了进一步提高降漏音效果，在耳机10上，发声部11的质心H与耳挂极值点N之间的距离可以为24mm-26mm。在一些实施例中，为了使得发声部11与耳甲腔形成的类腔体结构具有更合适的体积和开口大小/数量，并使发声部11的夹持位置位于耳甲腔内的较佳位置，在耳机10上，发声部11的质心H与耳挂极值点N之间的距离可以为24mm-26mm。
在一些实施例中，发声部11的质心H与耳挂极值点N之间的连线与发声部11的长轴方向X之间的第二夹角可以影响发声部11伸入耳甲腔的位置。当发声部11的质心H与耳挂极值点N之间的连线与发声部11的长轴方向X之间的第二夹角过大时，发声部11在耳甲腔内的位置偏下，发声部11的上侧面US与耳甲腔之间的缝隙过大，导致听音效果较弱。当发声部11的质心H与耳挂极值点N之间的连线与发声部11的长轴方向X之间的第二夹角过小时，发声部11的上侧面US与耳甲腔的上边缘贴合，上侧面US与耳甲腔之间的缝隙太小或数量太少，导致降漏音效果差。
在一些实施例中，极值点N'点与发声部11的质心H的投影点H'之间的连线N'H'与发声部11的投影的长轴方向X(即x轴方向)之间的第二夹角α3范围可以小于90°，从而使得发声部11的质心H的投影点H'在发声部11的长轴方向X上位于极值点N'的后侧，即发声部11的质心H相较于极值点N'在耳挂12上的对应点N更靠近用户的脑后，以进一步增强前述“夹紧力杠杆”的稳定性。需要说明的是，极值点N'与发声部11的质心的投影点H'之间的连线N'H'与发声部11的投影的长轴方向X(即x轴方向)之间的第二夹角α3，是指以x轴正方向为基准，逆时针方向上连线N'H'与x轴的夹角，如图7所示。
在一些实施例中，为了获得较好的听音效果，极值点N'点与发声部11的质心H的投影点H'之间的连线N'H'与发声部11的投影的长轴方向X(即x轴方向)之间的第二夹角α3范围可以为65°-85°。在一些实施例中，为了进一步提高降漏音效果，极值点N'点与发声部11的质心H的投影点H'之间的连线N'H'与发声部11的投影的长轴方向X(即x轴方向)之间的第二夹角α3范围可以为70°-80°。在一些实施例中，为了使得发声部11与耳甲腔形成的类腔体结构具有更合适的体积和开口大小/数量，并使发声部11的夹持位置位于耳甲腔内的较佳位置，极值点N'点与发声部11的质心H的投影点H'之间的连线N'H'与发声部11的投影的长轴方向X(即x轴方向)之间的第二夹角α3范围可以为75°-79°。
在一些实施例中，除了通过上述投影点的位置反映发声部11的质心H与耳挂极值点N之间的连线与发声部11的长轴方向X之间的第二夹角α3，也可以在耳挂12上进行实测。在一些实施例中，为了获得较好的听音效果，在耳机10上，发声部11的质心H与耳挂极值点N之间的连线与发声部11的长轴方向X之间的第二夹角α3范围可以为70°-85°。在一些实施例中，为了进一步提高降漏音效果，在耳机10上，发声部11的质心H与耳挂极值点N之间的连线与发声部11的长轴方向X之间的第二夹角α3范围可以为75°-80°。在一些实施例中，为了使得发声部11与耳甲腔形成的类腔体结构具有更合适的体积和开口大小/数量，并使发声部11的夹持位置位于耳甲腔内的较佳位置，在耳机10上，发声部11的质心H与耳挂极值点N之间的连线与发声部11的长轴方向X之间的第二夹角α3范围可以为77°-80°。
在一些实施例中，在用户的矢状面上，极值点N'与耳机10的质心F的投影点F'之间的连线N'F'与发声部11的投影的长轴方向X(即x轴方向)之间的第一夹角α2小于极值点N'点与发声部11的质心H的投影点H'之间的连线N'H'与发声部11的投影的长轴方向X(即x轴方向)之间的第二夹角α3。即，连线N'F'与x轴的第一夹角α2小于连线N'H'与x轴的第二夹角α3，从而使得耳机10的质心F在发声部11的长轴方向X上位于发声部11的质心H的后侧，即耳机10的质心F相较于发声部11的质心H更靠近用户的脑后。通过上述设置，可以使得耳机10在佩戴状态下耳挂12可以更好地对用户耳朵进行夹紧，进一步增强前述“夹紧力杠杆”的稳定性。
上顶点K与发声部11的质心H之间的位置一定程度体现了耳机10佩戴时发声部11的在耳部的相对位置。具体表现为，当发声部11的质心H与耳挂12的上顶点K的距离过大时，在用户佩戴耳机10时，发声部11的位置可能更加靠近用户的耳道口，导致发声部11在耳甲腔内的位置偏下，发声部11的上侧面US与耳甲腔之间的缝隙过大，导致听音效果较弱。当发声部11的质心H与耳挂12的上顶点K的距离过小时，发声部11的上侧面US与耳甲腔的上边缘贴合，上侧面US与耳甲腔之间的缝隙太小或数量太少，导致降漏音效果差，且发声部11上的出声孔与外耳道相距太远，对听音效果造成不利影响。
如图7所示，在一些实施例中，在耳机10在用户的矢状面的投影上，为了获得更好的听音效果，上顶点K的投影点K'与发声部11的质心H的投影点H'之间的距离可以为18mm-28mm。在一些实施例中，为了进一步提高降漏音效果，在耳机10在用户的矢状面的投影上，上顶点K的投影点K'与发声部11的质心H的投影点H'之间的距离可以为20mm-26mm。在一些实施例中，为了使得发声部11与耳甲腔形成的类腔体结构具有更合适的体积和开口大小/数量，在耳机10在用户的矢状面的投影上，上顶点K的投影点K'与发声部11的质心H的投影点H'之间的距离可以为22mm-24mm。
在一些实施例中，发声部11的质心H与耳挂12的上顶点K之间的连线与发声部11的长轴方向X之间的夹角会影响耳机10在佩戴状态下的稳定性。当发声部11的质心H与耳挂12的上顶点K之间的连线与发声部11的长轴方向X之间的夹角过大时，会导致发声部11的自由端FE距离用户耳甲腔的侧面较远，发声部11对耳甲腔的夹持较弱，佩戴不稳定。当发声部11的质心H与耳挂12的上顶点K之间的连线与发声部11的长轴方向X之间的夹角过小时，发声部11的自由端FE与用户耳甲腔的配合过紧，影响耳机10的佩戴舒适性，降低耳机10的可调节性。
在一些实施例中，为了使耳机10具有较高的佩戴稳定性与可调节性，在耳机10在用户的矢状面的投影上，上顶点K的投影点K'与发声部11的质心H的投影点H'之间的连线K'H'与发声部11的投影的长轴方向X(即x轴方向)之间的夹角α4范围可以为45°-70°。需要说明的是，上顶点K的投影点K'与发声部11的质心H的投影点H'之间的连线K'H'与发声部11的投影的长轴方向X(即x轴方向)之间的夹角α4，是指以x轴正方向为基准，逆时针方向上连线K'H'与x轴的夹角，如图7所示。在一些实施例中，为了进一步提升耳机10的佩戴稳定性，上顶点K的投影点K'与发声部11的质心H的投影点H'之间的连线K'H'与发声部11的投影的长轴方向X(即x轴方向)之间的夹角α4范围可以为50°-65°。在一些实施例中，为了进一步提升耳机10的可调节性，上顶点K的投影点K'与发声部11的质心H的投影点H'之间的连线K'H'与发声部11的投影的长轴方向X(即x轴方向)之间的夹角α4范围可以为55°-60°。
在一些实施例中，除了通过上述投影点的位置反映发声部11的质心H与上顶点K之间的连线与发声部11的长轴方向X之间的夹角α1，也可以在耳挂12上进行实测。在一些实施例中，为了使耳机10具有较高的佩戴稳定性与可调节性，发声部11的质心H与耳挂12的上顶点K之间的连线与发声部11的长轴方向X之间的夹角α1可以为30°-55°。在一些实施例中，为了进一步提升耳机10的佩戴稳定性，发声部11的质心H与耳挂12的上顶点K之间的连线与发声部11的长轴方向X之间的夹角α1可以为40°-50°。在一些实施例中，为了进一步提升耳机10的可调节性，发声部11的质心H与耳挂12的上顶点K之间的连线与发声部11的长轴方向X之间的夹角α1可以为45°-48°。
图10是根据本说明书一些实施例所示的耳机的第一投影的切线段的示意图。
参考图10，与第一投影共同界定出第一封闭曲线的切线段50，分别与第一端部轮廓相切于第一切点K0、与第二端部轮廓相切于第二切点K1。第一切点K0、第二切点K1与耳挂在第一平面上投影的极值点(如点N')三点的连线可以构成一个三角形，由于第一切点K0和第二切点K1的位置与第一封闭曲线的第一面积相关，故第一切点K0、第二切点K1与耳挂在第一平面上投影的极值点这三点的连线构成的三角形的面积改变，会导致第一面积的改变，也会相应导致耳挂12的形状 及尺寸的改变，例如，所述三角形的面积增大对应第一面积的减小，耳挂12的尺寸变小，进而影响用户的佩戴感。
在一些实施例中，考虑到用户的佩戴感以及第一封闭曲线的第一面积的实际范围，耳机10在非佩戴状态下，第一切点K0、第二切点K1与耳挂在第一平面上投影的极值点构成的三角形的面积在110mm2-230mm2之间，在一些实施例中，第一切点K0、第二切点K1与耳挂在第一平面上投影的极值点构成的三角形的面积在150mm2-190mm2之间，以使得第一封闭曲线的第一面积的范围在300mm2-500mm2之间。
参考图10，在一些实施例中，第一切点K0和第二切点K1位置靠近发声部11和耳挂所夹持的耳甲腔的内侧和外侧。在用户佩戴耳机10时，第一切点K0和第二切点K1之间的连线，即切线段50的尺寸与耳甲腔的大小相关。因此，上顶点与第一切点K0和第二切点K1三者能够决定用户佩戴耳机10时耳甲腔的受力情况，与用户佩戴体验相关。在一些实施例中，切线段50的长度在11mm-25mm之间、第二切点K1与耳挂在第一平面上投影的极值点的距离在31mm-58mm之间、第一切点K0与耳挂在第一平面上投影的极值点的距离在18mm-41mm之间。三角形中某一线段过长会导致无法对耳甲腔进行较好的夹持，佩戴的稳定也较差，容易发生脱落；而发声部11和耳挂在弹力驱动下，提供相互靠近的力，三角形中某一线段过短则会造成佩戴时耳甲腔或耳廓靠近头部一侧的不适，影响耳机10的佩戴体验，在一些实施例中，切线段50的长度在14mm-22mm之间。在一些实施例中，耳机10在非佩戴状态下，第二切点K1与耳挂在第一平面上投影的极值点的距离在35mm-55mm之间。在一些实施例中，耳机10在非佩戴状态下，第一切点K0与耳挂在第一平面上投影的极值点的距离在22mm-38mm之间。此外，上顶点、第一切点K0和第二切点K1构成的三角形任意线段长度变化会导致三角形内角的角度变化，基于与前文中相同的理由，在一些实施例中，第一切点K0、第二切点K1与耳挂在第一平面上投影的极值点构成的三角形中，第二切点K1处形成的夹角在17°-37°之间、第一切点K0处形成的夹角在110°-155°之间、耳挂在第一平面上投影的极值点处形成的夹角在9°-24°之间。为了进一步提高用户的佩戴体验以及佩戴的稳定性，在一些实施例中，第二切点K1处形成的夹角在20°-35°之间、第一切点K0处形成的夹角在120°-150°之间、耳挂在第一平面上投影的极值点处形成的夹角在10°-22°之间。
图11是根据本说明书一些实施例所示的耳机的耳挂、电池仓和发声部的质心形成的三角形的示意图。
参考图11，图中三角形1100的三个顶点分别对应耳机10的耳挂的质心1110、发声部的质心1120和电池仓的质心1130。前述三个质心构成的三角形1100影响耳机10佩戴时的稳定性、舒适度。其中，耳挂的质心位置会与耳挂的形状有关，此外，三个质心的分布也会对耳机10的质心位置产生影响。三角形1100中某一线段过长会导致耳机10佩戴时稳定性较差，例如电池仓的质心1130与耳挂的质心1110的距离过短，可能会导致耳机10佩戴时出现向发声部11所在位置倾斜的趋势，随着佩戴时间的延长或用户佩戴耳机10时的运动，发声部11可能会产生一定倾斜甚至脱落，影响用户佩戴体验。电池仓的质心1130与耳挂的质心1110的距离过长，会导致耳机10佩戴时出现向电池仓13方向所在位置倾斜的趋势，随着佩戴时间的延长或用户佩戴耳机10时的运动，发声部11同样会产生一定倾斜设甚至脱落，影响用户佩戴体验。考虑佩戴的稳定性，在一些实施例中，耳机10在非佩戴状态下，发声部的质心1120与耳挂的质心1110的相对距离在15mm-40mm之间；耳机10在非佩戴状态下，电池仓的质心1130与耳挂的质心1110的相对距离在40mm-62mm之间；发声部的质心1120与电池仓的质心1130的相对距离在11mm-35mm之间。在一些实施例中，为了进一步提高用户佩戴耳机10的舒适度，耳机10在非佩戴状态下，发声部的质心1120与耳挂的质心1110的相对距离在20mm-35mm之间；耳机10在非佩戴状态下，电池仓的质心1130与耳挂的质心1110的相对距离在35mm-55mm之间；发声部的质心1120与电池仓的质心1130的相对距离在15mm-30mm之间。
在一些实施例中，耳挂的质心1110、发声部的质心1120和电池仓的质心1130形成的三角形1100中的任意线段长度(两质心间的距离)变化会导致三角形1100的内角出现角度变化，进而对耳机10的实际佩戴感产生影响，例如，三角形1000中发声部的质心1120处形成的夹角过大或过小，可能导致前文中提到的发声部11与耳挂形成的杠杆结构的变化，影响用户佩戴体验。基于与前文中类似的理由，在一些实施例中，耳机10在非佩戴状态下，发声部的质心1120、耳挂的质心1110和电池仓的质心1130作为顶点连线形成的三角形1000中，电池仓的质心1130处形成的夹角在12°-22°之间；发声部质心处形成的夹角在111°-164°之间；耳挂的质心1110处形成的夹角在11°-24°之间。在一些实施例中，在三角形1100中，电池仓的质心1130处形成的夹角在15° -25°之间；发声部质心处形成的夹角在130°-160°之间；耳挂的质心1110处形成的夹角在12°-22°之间。
在一些实施例中，如前文所描述的，发声部可以具有不同于伸入耳甲腔的其它佩戴方式。以下以图12所示的耳机1200为例，对耳机1200进行详细说明。需要知道的是，在不违背相应声学原理的情况下，图12的耳机1200的结构以及其对应的参数也可以同样适用于上文中提到可以将发声部伸入耳甲腔的耳机中。
图12是根据本说明书又一些实施例所示的耳机的示例性佩戴示意图。
如图12所示，通过将发声部1201至少部分位于用户对耳轮105处，可以提高耳机1200的输出效果，即增大近场听音位置的声音强度，同时减小远场漏音的音量。用户在佩戴耳机1200时，发声部1201的壳体上靠近或朝向用户耳道的一侧可以设置一个或多个出声孔，发声部1201的壳体的其它侧面(例如，远离或背离用户耳道的侧面)上设置一个或多个泄压孔，出声孔与耳机1200的前腔声学耦合，泄压孔与耳机1200的后腔声学耦合。以发声部1201包括一个出声孔和泄压孔作为示例，出声孔输出的声音和泄压孔输出的声音可以近似视为两个声源，该两个声源的声音大小相等、相位相反。出声孔发出的声音可以不受阻碍地直接传递到用户耳道口，而泄压孔发出的声音需要绕过发声部1201的壳体或者穿过发声部1201形成类似图13所示的声学模型。如图13所示，当点声源A1和点声源A2之间设有挡板时，在近场，点声源A2的声场需要绕过挡板才能与点声源A1的声波在听音位置处产生干涉，相当于增加了点声源A2到听音位置的声程。因此，假设点声源A1和点声源A2具有相同的幅值，则相比于没有设置挡板的情况，点声源A1和点声源A2在听音位置的声波的幅值差增大，从而两路声音在听音位置进行相消的程度减少，使得听音位置的音量增大。在远场，由于点声源A1和点声源A2产生的声波在较大的空间范围内都不需要绕过挡板就可以发生干涉(类似于无挡板情形)，则相比于没有挡板的情况，远场的漏音不会明显增加。因此，在点声源A1和点声源A2的其中一个声源周围设置挡板结构，可以在远场漏音音量不显著增加的情况下，显著提升近场听音位置的音量。
图13是根据本说明书又一些实施例所示的耳机形成的声学模型示意图。
以发声部1201包括一个出声孔和泄压孔作为示例，如图13所示，出声孔输出的声音和泄压孔输出的声音可以近似视为两个声源，分别为点声源A1和点声源A2，该两个声源的声音大小相等、相位相反。出声孔发出的声音可以不受阻碍地直接传递到用户耳道口，而泄压孔发出的声音需要绕过发声部1201的壳体或者穿过发声部1201形成类似图13所示的声学模型。当点声源A1和点声源A2之间设有挡板时，在近场，点声源A2的声场需要绕过挡板才能与点声源A1的声波在听音位置处产生干涉，相当于增加了点声源A2到听音位置的声程。因此，假设点声源A1和点声源A2具有相同的幅值，则相比于没有设置挡板的情况，点声源A1和点声源A2在听音位置的声波的幅值差增大，从而两路声音在听音位置进行相消的程度减少，使得听音位置的音量增大。在远场，由于点声源A1和点声源A2产生的声波在较大的空间范围内都不需要绕过挡板就可以发生干涉(类似于无挡板情形)，则相比于没有挡板的情况，远场的漏音不会明显增加。因此，在点声源A1和点声源A2的其中一个声源周围设置挡板结构，可以在远场漏音音量不显著增加的情况下，显著提升近场听音位置的音量。
图14是根据本说明书一些实施例所示的非佩戴状态下耳机在第一平面的投影图。
如图14所示，耳挂1202和发声部1201在第一平面形成第二投影，第二投影包括外轮廓、第一端部轮廓、内轮廓和第二端部轮廓。与图3中耳机10结构类似，第二投影中的第一端部轮廓可以是发声部1201的自由端FE在第一平面上的投影轮廓，第一端部轮廓的两个端点P0和P1即为自由端FE与发声部1201其它部分交界位置在第一平面的投影点。第二端部轮廓可以是耳挂1202的末端BE在第一平面上的投影轮廓，第二端部轮廓的两个端点Q0和Q1即为末端BE与耳挂1202其它部分交界位置在第一平面的投影点。外轮廓可以是第一投影位于点P1与点Q1之间的轮廓。内轮廓可以是第二投影位于点P0与点Q0之间的轮廓。关于自由端FE和耳挂1202的末端BE的划分可以参见耳机10的相关描述(如本说明书图3和图5相关描述)。
以发声部1201在第一平面上的投影为类长方形(例如，跑道形)为例，发声部1201的投影中存在平行或近似平行的上侧面投影和下侧面投影，以及连接上侧面投影和下侧面投影的第一端部轮廓，第一端部轮廓可以是直线段或圆弧，点P0和点P1分别表示第一端部轮廓两端。仅作为示例，点P0可以是发声部1201自由端投影形成的弧线与上侧面投影的线段的交界点，与点P0类似，点P1可以是发声部1201自由端投影的弧线与下侧面投影的线段的交界点。相似的，耳挂1202远离发声部1201的一端也具有自由端，耳挂1202的自由端在第一平面60的投影形成第二端部轮廓， 第二端部轮廓可以是直线段或圆弧，点Q0和点Q1分别表示第二端部轮廓两端。在一些实施例中，点Q0和点Q1可以是耳挂1202的第一部分在第一平面60上远离耳挂第二部分的方向上的自由端投影的线段或弧线的两端点，进一步的，在发声部11的长轴方向Y上，靠近发声部11的端点为点Q0，远离发声部11的端点为Q1。
如图14所示，耳机1200在第一平面和人体矢状面的投影形状能够反映耳机1200在耳部的佩戴方式。例如，第二投影的面积可以反映耳机1200在非佩戴状态/佩戴状态下能够覆盖的耳廓的区域，以及发声部1201和耳挂1202与耳部的接触方式。在一些实施例中，由于发声部1201与耳挂1202的第一部分并未接触，第二投影中内轮廓、外轮廓、第一端部轮廓、第二端部轮廓形成一个非封闭的区域。该区域的大小与耳机1200的佩戴效果(例如，佩戴的稳定性、发声位置等)密切相关。为了方便理解，在一些实施例中，可以确定连接第一端部轮廓和第二端部轮廓的切线段1250，将切线段1250、外轮廓、第一端部轮廓和第二端部轮廓共同界定出的第二封闭曲线围成的面积作为第二投影的面积(也称为“第二面积”)。
在一些实施例中，耳机1200与图5所示的耳机10的不同之处包括：耳机1200的发声部1201在佩戴状态下位于用户对耳轮105处，因此，第二面积的范围小于第一面积。在一些实施例中，在非佩戴状态下，第二面积可以为第一面积的0.2倍-0.6倍。在一些实施例中，第二面积可以为第一面积的0.3倍-0.5倍。第二封闭曲线的第二面积的范围可以在50mm2-200mm2之间。为保证发声部1201的发声效率以及夹紧力的适中，避免耳机1200在佩戴时产生的异物感，第二封闭曲线的第二面积的范围在80mm2-150mm2之间。
当设定第二封闭曲线的第二面积的范围在50mm2-200mm2之间时，需要进一步设定耳挂耳挂1202本身的形状、尺寸，一方面使耳挂1202能够与用户耳朵适配，提升耳机10的佩戴稳定性与可调节性，另一方面使与耳挂1202连接的发声部1201位于对耳轮处，以避免发声部1201遮挡耳道，从而避免影响用户获取外界环境中的声音，以使用户具有较好的声学体验。以下将结合图14涉及的第一曲线说明耳挂1202的形状、尺寸。
在一些实施例中，如图14所示，可以将耳挂1202在用户的矢状面的投影中的第一曲线L2作为耳挂1202的参考曲线。在一些实施例中，由于耳机10在佩戴状态下，耳挂1202与用户耳部接触的区域主要为耳挂1202的内轮廓，因此第一曲线L2可以是耳挂1202在用户矢状面的投影的内轮廓对应的参考曲线。在一些实施例中，在发声部1201的投影的长轴方向X上，耳挂1202在用户矢状面的投影的内轮廓对应曲线具有最左端(点P')以及最右端(点Q')，耳挂1202在用户矢状面的投影的内轮廓位于点P'与点Q'之间的部分曲线即为第一曲线L2。通过对第一曲线L2的特征(例如极值点等)进行设计，可以确定耳挂1202的形状、尺寸，从而一方面提升耳挂1202与用户耳朵的适配度，提升耳机10的佩戴稳定性与可调节性，另一方面可以调控耳挂1202将发声部1201固定至用户耳部的具体位置，改善耳机10的听音效果。
当设定第二封闭曲线的第二面积的范围在50mm2-200mm2之间后，需要限定第二封闭曲线在发声部1201投影的长轴方向上的尺寸。如果第二封闭曲线在发声部11投影的长轴方向上的尺寸过小，会导致耳挂1202与发声部的连接端与其末端BE夹持用户耳廓过紧；如果第二封闭曲线在发声部11投影的长轴方向上的尺寸过大，会导致发声部11距离如耳挂上顶点的距离过小，影响发声部1201与对耳轮处的贴合效果，进而引起佩戴不适的问题。在一些实施例中，第二封闭曲线在发声部1201投影的长轴方向上的尺寸可以以发声部1201投影的长轴方向上第一曲线L2的最左端(点P')与最右端(点Q')之间的距离表征。在一些实施例中，在发声部1201投影的长轴方向上，第一曲线L2的最左端(点P')与最右端(点Q')之间的距离范围为25mm-35mm。在一些实施例中，为了使耳机10具有较好的佩戴稳定性，在发声部1201投影的长轴方向上，第一曲线L2的最左端(点P')与最右端(点Q')之间的距离范围为28mm-33mm。在一些实施例中，在发声部1201投影的长轴方向上，第一曲线L2的最左端(点P')与最右端(点Q')之间的距离范围为30mm-32mm。
请参照图14，在一些实施例中，可以以发声部1201在矢状面的投影的长轴方向X为x轴，短轴方向Y为y轴，x轴与y轴的交点作为原点o，建立第二直角坐标系xoy，第一曲线L2可以看作是第二直角坐标系xoy中的曲线。
在一些实施例中，可以将y轴方向称为第一方向，即第一方向与发声部1201在用户矢状面的投影的长轴方向X垂直，且朝向用户头顶的方向。在一些实施例中，在第二直角坐标系xoy内，第一曲线L2在第一方向具有极值点N'，通过设置极值点N'与耳挂1202以及发声部1201上其他位置点之间的位置关系可以调整耳机10的佩戴情况(例如，佩戴时的力学参数以及佩戴时发声部1201相对于耳部的位置)。请参照图3与图14，在一些实施例中，极值点N'位于耳挂1202上顶点K(以 上顶点在用户的矢状面上的投影点K'表示)的前侧或后侧，或者极值点N'与耳挂上顶点K的投影点K'的位置重合。也就是说，在用户矢状面内的耳挂1202的投影上，相较于上顶点的投影点K'，极值点N'的位置更远离用户的脑后或更靠近用户的脑后，或者两者的位置重合。
在一些实施例中，耳挂1202的上顶点可以为佩戴状态下耳挂1202的内轮廓沿用户垂直轴的最高点。在一些实施例中，当用户佩戴耳机10时，耳部可以主要通过耳挂1202的上顶点对耳机1200形成支撑。在一些实施例中，耳挂1202的上顶点可以是佩戴状态下耳挂1202内轮廓弯曲程度最大的位置。在一些实施例中，耳挂1202的上顶点可以是佩戴状态下，耳挂1202内轮廓上距离耳挂1202末端(即第一部分121的末端，耳挂1202未与发声部1201连接的一端)最远的点。在一些实施例中，耳挂1202的上顶点的位置可以同时满足上述三个位置中的一个或多个。
如图12所示，耳机1200在佩戴状态下发声部1201需要位于对耳轮处，耳挂极值点与上顶点之间在发声部1201的长轴方向X上的间距可以影响发声部1201相对于对耳轮的位置以及发声部1201的方向。
当耳挂极值点与上顶点之间在发声部1201的长轴方向X上的间距过大时，会导致耳挂1202的第一部分121与耳部的贴合变差而降低耳机1200的佩戴稳定性，或者，会导致发声部1201在对耳轮102处的朝向(例如，长轴方向X)过于接近垂直轴，使得发声部1201与对耳轮的接触摩擦太小，从而使得发声部1201佩戴不稳，容易向耳道方向滑动。
为使发声部1201能够位于对耳轮处，同时避免发声部1201的自由端FE伸出用户的耳廓100，影响发声部1201与耳廓的贴合效果，进而引起佩戴不适的问题，在一些实施例中，在耳挂1202在用户矢状面的投影上，沿发声部1201的长轴方向X上，极值点N'与上顶点的投影点K'之间的距离可以不大于5mm，即极值点N'与上顶点的投影点K'之间的距离可以为0mm-5mm。在一些实施例中，在耳挂1202在用户矢状面的投影上，沿发声部1201的投影的长轴方向X上，极值点N'与耳挂1202上顶点的投影点K'之间的距离可以为0mm-3mm。在一些实施例中，在耳挂1202在用户矢状面的投影上，沿发声部1201的投影的长轴方向X上，极值点N'与耳挂1202上顶点的投影点K'之间的距离可以为0mm-2mm。需要说明的是，上述极值点N'与上顶点的投影点K'之间的距离并不限制两者之间的方位，极值点N'可以位于上顶点的投影点K'的前侧或后侧；当极值点N'与上顶点的投影点K'之间的距离为0mm时，表示极值点N'与上顶点的投影点K'重合。
需要说明的是，对耳机1200在用户的矢状面上的投影上的相关距离及角度的测量方法，可以为：对于耳机1200，拍摄一张与投影面(用户的矢状面)相平行的照片，在照片上测量相关的距离及角度，再根据照片的比例尺进行换算，即可得到投影面上的相关距离及角度的实际数据。
当限定耳挂1202相关形状、尺寸后，为保证发声部1201能够位于对耳轮处，以保证发声部1201佩戴的稳定性，需进一步限定发声部1201相对于耳廓及对耳轮的佩戴角度。在一些实施例中，为了使得发声部1201的整部或部分区域位于对耳轮中，如图14所示，发声部1201投影的长轴方向X与水平方向(即图14所示的矢状轴方向)的倾角范围可以为0°-15°。在一些实施例中，发声部1201投影的长轴方向X与水平方向的倾角范围可以为0°-10°。在一些实施例中，发声部1201投影的长轴方向X与水平方向的倾角范围可以为0°-5°。
当设定第二封闭曲线的第二面积的范围在50mm2-200mm2之间后，需要限定第二封闭曲线在发声部1201投影的短轴方向(即第一方向)上的距离。第二封闭曲线在发声部1201投影的第一方向上的距离影响与发声部1201与对耳轮的位置，若该距离过小，会使发声部1201的自由端FE伸出用户的耳廓100，若该距离过大，会导致发声部1201遮挡耳道，使得耳道的开放性不足。在一些实施例中，在非佩戴状态下，第二封闭曲线在发声部1201投影的第一方向上的距离可以以第一方向上极值点N'与第一曲线L1的最左端(点P')之间的距离表征。在一些实施例中，为保证发声部1201能够位于对耳轮处，在第一方向上，极值点N'与第一曲线L2的最左端(点P')之间的距离范围为15mm-20mm。在一些实施例中，极值点N'与第一曲线L2的最左端(点P')之间的距离范围为15mm-18mm。在一些实施例中，极值点N'与第一曲线L2的最左端(点P')之间的距离范围为16mm-28mm。
类似地，在一些实施例中，第二封闭曲线在发声部1201投影的第一方向上的距离可以以第一方向上上顶点的投影点K'与第一曲线L2的最左端(点P')之间的距离表征。在一些实施例中，为保证发声部1201能够位于对耳轮内，在第一方向上，上顶点的投影点K'与第一曲线L2的最左端(点P')之间的距离范围为12mm-17mm。在一些实施例中，在第一方向上，上顶点的投影点K'与第一曲线L2的最左端(点P')之间的距离范围为13mm-16mm。在一些实施例中，在第一方向上，上顶点的投影点K'与第一曲线L2的最左端(点P')之间的距离范围为14mm-15mm。
在一些实施例中，如图12所示，耳机1210的质心位置为点F。在一些实施例中，受发声部1201的内部结构(如磁路、电路板等)影响，耳机1210中发声部1201的质量较大，因此，耳机1210的质心F的位置与发声部1201的质心的H位置接近，或受发声部1201质量影响较大，即耳机1210的质心F的位置一定程度上可以表示发声部1201的位置。为了便于说明，以下通过耳机1210的质心F与发声部1201的相对位置，对耳机1210的质心F的具体位置进行详细描述。
请参照图8A，在一些实施例中，在XY平面上，耳机1210的质心F点与发声部1201的上侧面(靠近头部的侧面)之间的距离可以为2mm-5mm。在一些实施例中，在XY平面上，耳机1210的质心F点与发声部1201的上侧面之间的距离可以为2.5mm-4.5mm。在一些实施例中，在XY平面上，耳机1210的质心F点与发声部1201的上侧面之间的距离可以为3mm-4mm。
在一些实施例中，在XY平面上，耳机1210的质心F点与发声部1201的长轴(即x轴)之间的距离可以为1mm-2mm。在一些实施例中，在XY平面上，耳机1210的质心F点与发声部1201的长轴(即x轴)之间的距离可以为1.2mm-1.8mm。在一些实施例中，在XY平面上，耳机1210的质心F点与发声部1201的长轴(即x轴)之间的距离可以为1.3mm-1.5mm。
在一些实施例中，在XY平面上，耳机1210的质心F点与发声部1201的自由端FE之间的距离可以为4mm-8mm。在一些实施例中，在XY平面上，耳机1210的质心F点与发声部1201的自由端FE(即后侧面RS)之间的距离可以为6mm-8mm。在一些实施例中，在XY平面上，耳机1210的质心F点与发声部1201的自由端FE(即后侧面RS)之间的距离可以为6.5mm-7mm。
在一些实施例中，在XZ平面上，耳机1210的质心F点与发声部1201的内侧面(靠近耳廓的侧面)之间的距离可以为3mm-8mm。在一些实施例中，在XZ平面上，耳机1210的质心F点与发声部1201的内侧面之间的距离可以为4mm-6mm。在一些实施例中，在XZ平面上，耳机1210的质心F点与发声部1201的内侧面之间的距离可以为4.5mm-5mm。
在一些实施例中，通过对耳机1210的质心F、上顶点以及耳挂极值点的位置进行设计，可以提升耳机1210的佩戴稳定性与可调性。在一些实施例中，由于耳部主要通过耳挂12的上顶点对耳机1210形成支撑，因此在用户佩戴耳机1210时，可以视为形成以上顶点K为支撑点的“支撑杠杆”。在佩戴状态下，耳机1210的质心F位于上顶点后侧(即靠近用户脑后的一侧)，可以避免耳机1210在佩戴状态下具有向前(即远离用户脑后的方向)翻转的趋势，从而提升耳机1210的佩戴稳定性。在一些实施例中，耳挂极值点处可以是耳挂12上横截面最小的位置，以使得耳挂12在耳挂极值点N处更易发生变形，由此，在用户佩戴耳机1210时，耳挂12的第一部分121以及发声部1201会以耳挂极值点N为支点形成类似“夹紧力杠杆”的结构而夹持于用户耳部两侧(例如对耳轮的前后两侧)。为了提高“支撑杠杆”和“夹紧力杠杆”的稳定性，耳机1210的质心F与上顶点K分别位于耳挂极值点N的两侧。以下将进一步对质心F、上顶点K以及耳挂极值点N的位置进行详细描述。耳挂1202的第一部分以及发声部1201会以耳挂极值点为支点形成类似“夹紧力杠杆”的结构而夹持于用户耳部两侧(例如耳甲腔的前后两侧)。为了提高“支撑杠杆”和“夹紧力杠杆”的稳定性，耳机耳挂1202的质心F与上顶点分别位于耳挂极值点的两侧。以下将进一步对质心F、上顶点以及耳挂极值点的位置进行详细描述。
参考图14，在一些实施例中，耳机1210的质心F在用户的矢状面上的投影点为点F'。在一些实施例中，耳机1210在非佩戴状态下，耳机1210的质心F的投影点F'与耳挂的极值点的距离也与佩戴时稳定性以及用户耳部与头部连接位置的异物感有关。在一些实施例中，当耳机1210的质心F的投影点F'与耳挂极值点的距离过大时，耳机1210在耳部的夹持位置可能过低，可能出现佩戴时发声部1201遮挡耳道，使得耳道的开放性不佳。当耳机1210的质心F的投影点F'与耳挂极值点的距离过小时，说明前述“夹紧力杠杆”支点两端的力臂可能过小，在夹持力不变的情况下，会导致杠杆结构稳定性较差，耳机1210在佩戴状态下，可能出现佩戴不稳定的情况。
在一些实施例中，为了使耳机1210在佩戴状态下具有较高的佩戴稳定性，在耳机1210在用户的矢状面的投影上，极值点N'与耳机1210的质心F的投影点F'之间的距离可以为15mm-30mm。在一些实施例中，为了进一步提升耳机1210的佩戴稳定性，在耳机1210在用户的矢状面的投影上，极值点N'点与耳机1210的质心F的投影点F'之间的距离可以为18mm-28mm。在一些实施例中，在耳机1210在用户的矢状面的投影上，极值点N'点与耳机1210的质心F的投影点F'之间的距离可以为20mm-24mm。
在一些实施例中，耳机1210的质心F与耳挂极值点的连线与发声部1201的长轴方向X之间的第三夹角b1的大小一定程度上决定了耳机1210内轮廓的形态，而内轮廓的形态与用户佩戴感相关。具体的，为了保证用户在佩戴该耳机1210时，耳挂与用户耳部或头部的贴合，该夹角过大或 过小均可能会导致佩戴时的形态改变。具体地，当耳机1210的质心F与耳挂极值点的连线与发声部1201的长轴方向X之间的第三夹角b1过大时，发声部1201的夹持位置相对于对耳轮过于靠下。当耳机1210的质心F与耳挂极值点的连线与发声部1201的长轴方向X之间的第三夹角b1过小时，发声部1201的夹持位置相对于对耳轮过于靠上，发声部1201的自由端FE可能伸出耳廓边缘。
在一些实施例中，如图14所示，在耳机1210在用户的矢状面的投影上，极值点N'与耳机1210的质心的投影点F'之间的连线N'F'与发声部1201的投影的长轴方向X(即x轴方向)之间的第三夹角b1范围可以小于90°，从而使得耳机1210的质心F的投影点F'在发声部1201的长轴方向X上位于极值点N'的后侧。由于耳机1210的质心F主要受发声部1201的质量影响，因此质心F的位置一定程度上也反映了发声部1201对耳甲腔的夹持位置，即发声部1201对耳甲腔的夹持位置相较于耳挂极值点N更靠近用户的脑后，以进一步增强前述“夹紧力杠杆”的稳定性。需要说明的是，极值点N'与耳机1210的质心的投影点F'之间的连线N'F'与发声部1201的投影的长轴方向X(即x轴方向)之间的第三夹角b1，是指以x轴正方向为基准，逆时针方向上连线N'F'与x轴的夹角，如图14所示。在一些实施例中，为了避免发声部1201的夹持位置相对于对耳轮过于靠下或过于靠上，极值点N'点与耳机1210的质心F的投影点F'之间的连线N'F'与发声部1201的投影的长轴方向X(即x轴方向)之间的第三夹角b1范围可以为50°-87°。在一些实施例中，极值点N'点与耳机1210的质心F的投影点F'之间的连线N'F'与发声部1201的投影的长轴方向X(即x轴方向)之间的第三夹角b1范围可以为55°-80°。在一些实施例中，为了使发声部1201的夹持位置位于对耳轮内的较佳位置，极值点N'点与耳机1210的质心F的投影点F'之间的连线N'F'与发声部1201的投影的长轴方向X(即x轴方向)之间的第三夹角b1范围可以为60°-75°。
由于耳机1210的质心F的位置受发声部1201位置的影响较大，在耳挂12总体体积变化不大的情况下，上顶点与耳机1210的质心F之间的位置一定程度体现了耳机1210佩戴时发声部1201的在耳部的相对位置。具体表现为，当耳机1210的质心位置F与耳挂12的上顶点的距离过大时，在用户佩戴耳机1210时，发声部1201的位置可能更加靠近用户的耳道口，导致发声部1201在对耳轮内的位置偏下，导致发声部1201遮挡耳道。当耳机1210的质心位置F与耳挂12的上顶点的距离过小时，发声部1201的自由端FE可能伸出耳廓边缘。
如图14所示，在一些实施例中，在耳机1210在用户的矢状面的投影上，上顶点的投影点K'与耳机1210的质心F的投影点F'之间的距离可以为17mm-30mm。在一些实施例中，上顶点的投影点K'与耳机1210的质心F的投影点F'之间的距离可以为20mm-28mm。在一些实施例中，上顶点的投影点K'与耳机1210的质心F的投影点F'之间的距离可以为22mm-25mm。
在一些实施例中，耳机1210的质心F与耳挂12的上顶点之间的连线与发声部1201的长轴方向X之间的夹角会影响耳机1210在佩戴状态下的稳定性。当耳机1210的质心F与耳挂12的上顶点之间的连线与发声部1201的长轴方向X之间的夹角过大时，会导致发声部1201的自由端FE距离耳轮107边缘较远，发声部1201对对耳轮的夹持较弱，佩戴不稳定。当耳机1210的质心F与耳挂12的上顶点之间的连线与发声部1201的长轴方向X之间的夹角过小时，发声部1201与用户对耳轮的配合过紧，影响耳机1210的佩戴舒适性，降低耳机1210的可调节性。
在一些实施例中，为了使耳机1210具有较高的佩戴稳定性与可调节性，在耳机1210在用户的矢状面的投影上，上顶点的投影点K'与耳机1210的质心F的投影点F'之间的连线K'F'与发声部1201的投影的长轴方向X(即x轴方向)之间的夹角b2范围可以为30°-55°。需要说明的是，上顶点的投影点K'与耳机1210的质心F的投影点F'之间的连线K'F'与发声部1201的投影的长轴方向X(即x轴方向)之间的夹角，是指以x轴正方向为基准，逆时针方向上连线K'F'与x轴的夹角，如图14所示。在一些实施例中，为了进一步提升耳机1210的佩戴稳定性，上顶点的投影点K'与耳机1210的质心F的投影点F'之间的连线K'F'与发声部1201的投影的长轴方向X(即x轴方向)之间的夹角b2范围可以为35°-50°。在一些实施例中，为了进一步提升耳机1210的可调节性，上顶点的投影点K'与耳机1210的质心F的投影点F'之间的连线K'F'与发声部1201的投影的长轴方向X(即x轴方向)之间的夹角b2范围可以为38°-45°。
在一些实施例中，如图12所示，除了可以设置耳机1210的质心F的位置，还可以直接设置发声部1201的质心H的位置，以改善耳机1210的佩戴稳定性。如图12与图14所示，在一些实施例中，发声部1201的质心H在用户的矢状面上的投影点可以与发声部1201在用户的矢状面上的投影的形心重合。在一些实施例中，在耳机1210上，通过改变发声部1201的质心H与耳挂极值点之间的距离，可以同时改变佩戴状态下发声部1201在对耳轮中的覆盖位置，以及发声部1201夹持对耳轮的夹持位置，以影响用户佩戴耳机1210的稳定性、舒适度。
当发声部1201的形状、尺寸一致时，如果发声部1201的质心H与耳挂极值点之间的距离过大，会导致发声部1201在对耳轮内的位置偏下，可能导致发声部1201遮挡耳道。当发声部1201的形状、尺寸一致时，如果发声部1201的质心H与耳挂极值点之间的距离太小，发声部1201的自由端FE可能伸出耳廓边缘，也会影响佩戴的舒适度。
在一些实施例中，如图14所示，发声部1201的质心H在用户矢状面上的投影点以及发声部1201在用户的矢状面上的投影的形心为点H'，且点H'位于发声部1201的投影的长轴上，即点H'位于x轴上。在一些实施例中，为了使得耳机1210在佩戴状态下具有更好的听音效果，极值点N'与发声部1201质心H在用户的矢状面上的投影点H'之间的距离可以为20mm-30mm。在一些实施例中，为了保持耳道的开放，极值点N'与发声部1201质心H在用户的矢状面上的投影点H'之间的距离可以为15mm-25mm。在一些实施例中，极值点N'与发声部1201质心H在用户的矢状面上的投影点H'之间的距离可以为18mm-22mm。
在一些实施例中，发声部1201的质心H与耳挂极值点之间的连线与发声部1201的长轴方向X之间的第四夹角可以影响发声部1201在对耳轮上的位置。当发声部1201的质心H与耳挂极值点之间的连线与发声部1201的长轴方向X之间的第四夹角过大时，可能导致发声部1201遮挡耳道。当发声部1201的质心H与耳挂极值点之间的连线与发声部1201的长轴方向X之间的第四夹角过小时，发声部1201的自由端FE可能伸出耳廓边缘，也会影响佩戴的舒适度。
在一些实施例中，极值点N'点与发声部1201的质心H的投影点H'之间的连线N'H'与发声部1201的投影的长轴方向X(即x轴方向)之间的第四夹角b3的取值范围为60°-87°，从而使得发声部1201的质心H的投影点H'在发声部1201的长轴方向X上位于极值点N'的后侧，即发声部1201的质心H相较于极值点N'在耳挂12上的对应点N更靠近用户的脑后，以进一步增强前述“夹紧力杠杆”的稳定性。需要说明的是，极值点N'与发声部1201的质心的投影点H'之间的连线N'H'与发声部1201的投影的长轴方向X(即x轴方向)之间的第四夹角b3，是指以x轴正方向为基准，逆时针方向上连线N'H'与x轴的夹角，如图14所示。在一些实施例中，极值点N'点与发声部1201的质心H的投影点H'之间的连线N'H'与发声部1201的投影的长轴方向X(即x轴方向)之间的第四夹角b3范围可以为65°-82°。在一些实施例中，极值点N'点与发声部1201的质心H的投影点H'之间的连线N'H'与发声部1201的投影的长轴方向X(即x轴方向)之间的第四夹角b3范围可以为70°-78°。在一些实施例中，为了使发声部1201的夹持位置位于对耳轮内的较佳位置，极值点N'点与发声部1201的质心H的投影点H'之间的连线N'H'与发声部1201的投影的长轴方向X(即x轴方向)之间的第四夹角b3范围可以为72°-76°。
在一些实施例中，在用户的矢状面上，极值点N'与耳机1210的质心F的投影点F'之间的连线N'F'与发声部1201的投影的长轴方向X(即x轴方向)之间的第三夹角b1小于极值点N'点与发声部1201的质心H的投影点H'之间的连线N'H'与发声部1201的投影的长轴方向X(即x轴方向)之间的第四夹角b3。即，连线N'F'与x轴的第三夹角b1小于连线N'H'与x轴的第四夹角b3，从而使得耳机1210的质心F在发声部1201的长轴方向X上位于发声部1201的质心H的后侧，即耳机1210的质心F相较于发声部1201的质心H更靠近用户的脑后。通过上述设置，可以使得耳机1210在佩戴状态下耳挂12可以更好地对用户耳朵进行夹紧，进一步增强前述“夹紧力杠杆”的稳定性。
上顶点与发声部1201的质心H之间的位置一定程度体现了耳机1210佩戴时发声部1201的在耳部的相对位置。具体表现为，当发声部1201的质心H与耳挂12的上顶点的距离过大时，在用户佩戴耳机1210时，发声部1201的位置可能更加靠近用户的耳道口，导致发声部1201在对耳轮内的位置偏下，从而导致发声部1201遮挡耳道。当发声部1201的质心H与耳挂12的上顶点的距离过小时，发声部1201的自由端FE可能伸出耳廓边缘，导致佩戴体验不佳。
如图14所示，在一些实施例中，为了获得更好的佩戴舒适性，在耳机1210在用户的矢状面的投影上，上顶点的投影点K'与发声部1201的质心H的投影点H'之间的距离可以为10mm-20mm。在一些实施例中，在耳机1210在用户的矢状面的投影上，上顶点的投影点K'与发声部1201的质心H的投影点H'之间的距离可以为12mm-18mm。在一些实施例中，在耳机1210在用户的矢状面的投影上，上顶点的投影点K'与发声部1201的质心H的投影点H'之间的距离可以为14mm-16mm。
在一些实施例中，发声部1201的质心H与耳挂12的上顶点之间的连线与发声部1201的长轴方向X之间的夹角会影响耳机1210在佩戴状态下的稳定性。当发声部1201的质心H与耳挂12的上顶点之间的连线与发声部1201的长轴方向X之间的夹角过大时，会导致发声部1201的自由端FE距离用户对耳轮的侧面较远，发声部1201对对耳轮的夹持较弱，佩戴不稳定。当发声部 1201的质心H与耳挂12的上顶点之间的连线与发声部1201的长轴方向X之间的夹角过小时，发声部1201的自由端FE与用户耳轮边缘的配合过紧，影响耳机1210的佩戴舒适性，降低耳机1210的可调节性。
在一些实施例中，为了使耳机1210具有较高的佩戴稳定性与可调节性，在耳机1210在用户的矢状面的投影上，上顶点的投影点K'与发声部1201的质心H的投影点H'之间的连线K'H'与发声部1201的投影的长轴方向X(即x轴方向)之间的夹角b4范围可以为35°-65°。需要说明的是，上顶点的投影点K'与发声部1201的质心H的投影点H'之间的连线K'H'与发声部1201的投影的长轴方向X(即x轴方向)之间的夹角b4，是指以x轴正方向为基准，逆时针方向上连线K'H'与x轴的夹角，如图14所示。在一些实施例中，为了进一步提升耳机1210的佩戴稳定性，上顶点的投影点K'与发声部1201的质心H的投影点H'之间的连线K'H'与发声部1201的投影的长轴方向X(即x轴方向)之间的夹角b4范围可以为40°-60°。在一些实施例中，为了进一步提升耳机1210的可调节性，上顶点的投影点K'与发声部1201的质心H的投影点H'之间的连线K'H'与发声部1201的投影的长轴方向X(即x轴方向)之间的夹角b4范围可以为45°-55°。
图15是根据本说明书一些实施例所示的耳机的第二投影的切线段的示意图。
参考图15，与第二投影共同界定出第二封闭曲线的切线段1250，分别与第一端部轮廓相切于第一切点K0、与第二端部轮廓相切于第二切点K1。第一切点K0、第二切点K1与耳挂在第一平面上投影的极值点N'三点的连线可以构成一个三角形，由于第一切点K0和第二切点K1的位置与第二封闭曲线的第二面积相关，故第一切点K0、第二切点K1与耳挂在第一平面上投影的极值点这三点的连线构成的三角形的面积改变，会导致第二面积的改变，也会相应导致耳挂12的形状及尺寸的改变，例如，所述三角形的面积增大对应第二面积的减小，耳挂12的尺寸变小，进而影响用户的佩戴感。
在一些实施例中，考虑到用户的佩戴感以及第二封闭曲线的第二面积的实际范围，耳机1210在非佩戴状态下，第一切点K0、第二切点K1与耳挂在第一平面上投影的极值点构成的三角形的面积在110mm2-230mm2之间，在一些实施例中，第一切点K0、第二切点K1与耳挂在第一平面上投影的极值点构成的三角形的面积在150mm2-190mm2之间，以使得第二封闭曲线的第二面积的范围在1150mm2-1350mm2之间。
参考图15，在一些实施例中，第一切点K0和第二切点K1位置靠近发声部1201和耳挂所夹持的对耳轮的内侧和外侧。在用户佩戴耳机1210时，第一切点K0和第二切点K1之间的连线，即切线段1250的尺寸与对耳轮的大小相关。因此，上顶点与第一切点K0和第二切点K1三者能够决定用户佩戴耳机1210时对耳轮的受力情况，与用户佩戴体验相关。在一些实施例中，切线段1250的长度在11mm-25mm之间、第二切点K1与耳挂在第一平面上投影的极值点的距离在31mm-58mm之间、第一切点K0与耳挂在第一平面上投影的极值点的距离在18mm-41mm之间。三角形中某一线段过长会导致无法对对耳轮进行较好的夹持，佩戴的稳定也较差，容易发生脱落；而发声部1201和耳挂在弹力驱动下，提供相互靠近的力，三角形中某一线段过短则会造成佩戴时对耳轮或耳廓靠近头部一侧的不适，影响耳机1210的佩戴体验，在一些实施例中，切线段1250的长度在14mm-22mm之间。在一些实施例中，耳机1210在非佩戴状态下，第二切点K1与耳挂在第一平面上投影的极值点的距离在35mm-55mm之间。在一些实施例中，耳机1210在非佩戴状态下，第一切点K0与耳挂在第一平面上投影的极值点的距离在22mm-38mm之间。此外，上顶点、第一切点K0和第二切点K1构成的三角形任意线段长度变化会导致三角形内角的角度变化，基于与前文中相同的理由，在一些实施例中，第一切点K0、第二切点K1与耳挂在第一平面上投影的极值点构成的三角形中，第二切点K1处形成的夹角在17°-37°之间、第一切点K0处形成的夹角在110°-155°之间、耳挂在第一平面上投影的极值点处形成的夹角在9°-24°之间。为了进一步提高用户的佩戴体验以及佩戴的稳定性，在一些实施例中，第二切点K1处形成的夹角在20°-35°之间、第一切点K0处形成的夹角在120°-150°之间、耳挂在第一平面上投影的极值点处形成的夹角在10°-22°之间。
参见图12、图14及图15，发声部1201的质心H与耳挂1202的质心M之间的距离会影响耳挂1202形成的第一曲线的形状，从而会影响耳挂1202佩戴时的稳定性、舒适度。其中，发声部1201的质心H与耳挂1202的质心M之间的距离过短，耳挂1202形成的第一曲线在长轴方向X上的距离过小，可能会导致发声部1201的自由端FE与用户耳轮边缘的配合过紧，影响耳挂1202的佩戴舒适性；发声部1201的质心H与耳挂1202的质心M之间的距离过大，耳挂1202形成的第一曲线在长轴方向X上的距离过大，可能会导致发声部1201的自由端FE可能伸出耳廓边缘，从而使得佩戴体验不佳。考虑佩戴的稳定性，在一些实施例中，在非佩戴状态下，在耳挂1202在用户的 矢状面的投影上，发声部1201的质心H的投影点H'与耳挂1202的质心M的投影点M'的距离在25mm-40mm之间。在一些实施例中，为了进一步提高用户佩戴耳挂1202的舒适度，在非佩戴状态下，在耳挂1202在用户的矢状面的投影上，发声部1201的质心H的投影点H'与耳挂1202的质心M的投影点M'的距离在28mm-36mm之间。在一些实施例中，在非佩戴状态下，在耳挂1202在用户的矢状面的投影上，发声部1201的质心H的投影点H'与耳挂1202的质心M的投影点M'的距离在30mm-34mm之间。
上文已对基本概念做了描述，显然，对于本领域技术人员来说，上述详细披露仅仅作为示例，而并不构成对本说明书的限定。虽然此处并没有明确说明，本领域技术人员可能会对本说明书进行各种修改、改进和修正。该类修改、改进和修正在本说明书中被建议，所以该类修改、改进、修正仍属于本说明书示范实施例的精神和范围。
同时，本说明书使用了特定词语来描述本说明书的实施例。如“一个实施例”、“一实施例”、和/或“一些实施例”意指与本说明书至少一个实施例相关的某一特征、结构或特点。因此，应强调并注意的是，本说明书中在不同位置两次或多次提及的“一实施例”或“一个实施例”或“一个替代性实施例”并不一定是指同一实施例。此外，本说明书的一个或多个实施例中的某些特征、结构或特点可以进行适当的组合。
同理，应当注意的是，为了简化本说明书披露的表述，从而帮助对一个或多个发明实施例的理解，前文对本说明书实施例的描述中，有时会将多种特征归并至一个实施例、附图或对其的描述中。但是，这种披露方法并不意味着本说明书对象所需要的特征比权利要求中提及的特征多。实际上，实施例的特征要少于上述披露的单个实施例的全部特征。
最后，应当理解的是，本说明书中所述实施例仅用以说明本说明书实施例的原则。其他的变形也可能属于本说明书的范围。因此，作为示例而非限制，本说明书实施例的替代配置可视为与本说明书的教导一致。相应地，本说明书的实施例不仅限于本说明书明确介绍和描述的实施例。

Claims (23)

  1. 一种耳机，包括：
    发声部，包括换能器和容纳所述换能器的壳体；
    耳挂，所述耳挂包括第一部分和第二部分；在佩戴状态下，所述第一部分挂设在用户耳廓和头部之间，所述第二部分向耳廓背离头部的一侧延伸并连接所述发声部，将所述发声部佩戴于耳道附近但不堵塞耳道口的位置；其中，
    所述耳挂和所述发声部在用户的矢状面形成第一投影，所述第一投影包括外轮廓、第一端部轮廓、内轮廓和第二端部轮廓，在非佩戴状态下，所述内轮廓、所述第一端部轮廓、所述第二端部轮廓以及连接所述第一端部轮廓和所述第二端部轮廓的切线段共同界定出第一封闭曲线，所述第一封闭曲线的第一面积范围在300mm2-500mm2之间；
    所述内轮廓中与所述耳挂对应的部分包括第一曲线，所述第一曲线在第一方向具有极值点，所述第一方向垂直于所述发声部投影的长轴方向；所述极值点位于所述耳挂上顶点在所述矢状面上的投影点的后侧，所述耳挂上顶点为佩戴状态下所述耳挂的内侧壁沿用户垂直轴的最高点。
  2. 根据权利要求1所述的耳机，其中，在佩戴状态下，所述壳体的至少部分插入耳甲腔。
  3. 根据权利要求1所述的耳机，其中，沿所述发声部投影的长轴方向上，所述极值点与所述耳挂上顶点在用户的矢状面上的投影点的距离为6mm-15mm。
  4. 根据权利要求1所述的耳机，其中，在所述发声部投影的长轴方向上，所述内轮廓中与所述耳挂对应的部分包括最左端与最右端，所述最左端与所述最右端分别为所述第一曲线的两端点，在非佩戴状态下，在所述发声部投影的长轴方向上，所述最左端与所述最右端的距离为25mm-35mm。
  5. 根据权利要求1所述的耳机，其中，在所述发声部投影的长轴方向上，所述内轮廓中与所述耳挂对应的部分包括最左端，在非佩戴状态下，在所述第一方向上，所述极值点与所述最左端的距离为20mm-25mm。
  6. 根据权利要求1所述的耳机，其中，在所述发声部投影的长轴方向上，所述内轮廓中与所述耳挂对应的部分包括最左端，在非佩戴状态下，在所述第一方向上，所述上顶点在所述矢状面上的投影点与所述最左端的距离为17mm-22mm。
  7. 根据权利要求1所述的耳机，其中，在非佩戴状态下，所述耳机的质心在所述矢状面的投影点与所述极值点的距离为20mm-35mm。
  8. 根据权利要求1所述的耳机，其中，在非佩戴状态下，所述极值点与所述发声部质心在所述矢状面上的投影点的距离范围为20mm-30mm。
  9. 根据权利要求1所述的耳机，其中，在非佩戴状态下，所述耳挂上顶点在所述矢状面上的投影点与所述耳机的质心在所述矢状面上的投影点的距离为22mm-35mm。
  10. 根据权利要求1所述的耳机，其中，在非佩戴状态下，所述耳挂上顶点在所述矢状面上的投影点与所述发声部质心在所述矢状面上的投影点的距离为18mm-28mm。
  11. 根据权利要求1所述的耳机，其中，所述切线段与所述第一端部轮廓相切于第一切点，与所述第二端部轮廓相切于第二切点，所述开放式耳机在非佩戴状态下，所述第一切点、所述第二切点与极值点构成的三角形的面积在150mm2-190mm2之间。
  12. 根据权利要求1所述的耳机，其中，在非佩戴状态下，所述发声部质心在所述矢状面的投影点与所述耳挂的质心的在所述矢状面的投影点的距离为20mm-35mm。
  13. 一种耳机，包括：
    发声部，包括换能器和容纳所述换能器的壳体；
    耳挂，所述耳挂包括第一部分和第二部分；在佩戴状态下，所述第一部分挂设在用户耳廓和头 部之间，所述第二部分向耳廓背离头部的一侧延伸并连接所述发声部，将所述发声部佩戴于耳道附近但不堵塞耳道口的位置；其中，
    所述耳挂和所述发声部在用户的矢状面形成第二投影，所述第二投影包括外轮廓、第一端部轮廓、内轮廓和第二端部轮廓，在非佩戴状态下，所述内轮廓、所述第一端部轮廓、所述第二端部轮廓以及连接所述第一端部轮廓和所述第二端部轮廓的切线段共同界定出第二封闭曲线，所述第二封闭曲线的第二面积范围在50mm2-200mm2之间；
    所述内轮廓中与所述耳挂对应的部分包括第一曲线，所述第一曲线在第一方向具有极值点，所述第一方向垂直于所述发声部投影的长轴方向；沿所述发声部投影的长轴方向上，所述极值点与所述耳挂上顶点在用户的矢状面上的投影点的距离不大于5mm，所述耳挂上顶点为佩戴状态下所述耳挂的内侧壁沿用户垂直轴的最高点。
  14. 根据权利要求13所述的耳机，其中，在佩戴状态下，所述壳体的至少部分覆盖对耳轮区域。
  15. 根据权利要求13所述的耳机，其中，在所述发声部投影的长轴方向上，所述内轮廓中与所述耳挂对应的部分包括最左端与最右端，所述最左端与所述最右端分别为所述第一曲线的两端点，在所述发声部投影的长轴方向上，所述最左端与所述最右端的距离为25mm-35mm。
  16. 根据权利要求13所述的耳机，其中，在所述发声部投影的长轴方向上，所述内轮廓中与所述耳挂对应的部分包括最左端，在非佩戴状态下，在所述第一方向上，所述极值点与所述最左端的距离为15mm-20mm。
  17. 根据权利要求13所述的耳机，其中，在所述发声部投影的长轴方向上，所述内轮廓中与所述耳挂对应的部分包括最左端，在非佩戴状态下，在所述第一方向上，所述上顶点在所述矢状面上的投影点与所述最左端的距离为12mm-17mm。
  18. 根据权利要求13所述的耳机，其中，在非佩戴状态下，所述耳机的质心在所述矢状面的投影点与所述极值点的距离为15mm-30mm。
  19. 根据权利要求13所述的耳机，其中，在非佩戴状态下，所述极值点与所述发声部质心在所述矢状面上的投影点的距离范围为15mm-25mm。
  20. 根据权利要求13所述的耳机，其中，在非佩戴状态下，所述耳挂上顶点在所述矢状面上的投影点与所述耳机的质心在所述矢状面上的投影点的距离为17mm-30mm。
  21. 根据权利要求13所述的耳机，其中，在非佩戴状态下，所述耳挂上顶点在所述矢状面上的投影点与所述发声部质心在所述矢状面上的投影点的距离为10mm-20mm。
  22. 根据权利要求13所述的耳机，其中，所述切线段与所述第一端部轮廓相切于第一切点，与所述第二端部轮廓相切于第二切点，所述开放式耳机在非佩戴状态下，所述第一切点、所述第二切点与极值点构成的三角形的面积在150mm2-190mm2之间。
  23. 根据权利要求13所述的耳机，其中，在非佩戴状态下，所述发声部质心在所述矢状面的投影点与所述耳挂的质心的在所述矢状面的投影点的距离为25mm-40mm。
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