earphones

Abstract

This invention discloses an earphone, the earphone including a sound generating unit, the sound generating unit including a first housing forming a first housing cavity, and a sound generating assembly installed in the first housing cavity and including two speakers, each speaker including a diaphragm, the two speakers engaging with each other along the axial direction to form a first acoustic cavity between the two speakers, the sound generating assembly and the first housing engaging with each other to form a second acoustic cavity between the sound generating assembly and the first housing, separated from the first acoustic cavity, the first housing is provided with a sound emission hole communicating with the first acoustic cavity and a pressure reducing hole communicating with the second acoustic cavity, sound generated on one side of the diaphragms of the two speakers is output through the first acoustic cavity and the sound emission hole, and sound generated on the other side of the diaphragms of the two speakers is output through the second acoustic cavity and the pressure reducing hole. With this method, this invention can improve the sound quality of the earphone.

Description

[Technical Field]

[0001] This application relates to the technology of electronic equipment, and more specifically, to earphones. [Background technology]

[0002] Earphones are widely used in people's daily lives and can be used in combination with electronic devices such as mobile phones and computers to provide users with audio playback functionality. Ear cuff-type earphones are a novel type of earphone that are typically small in volume and can be used by clamping them onto the wearer's earlobe. Furthermore, these ear cuff-type earphones do not block the ear canal, ensuring safety in outdoor scenarios, and offer superior wearing comfort compared to in-ear earphones.

[0003] However, current ear cuff-type earphones often fail to meet the required sound quality. [Overview of the Initiative] [Means for solving the problem]

[0004] The earphone according to the present application includes a sound generating unit, the sound generating unit includes a first housing that forms a first housing cavity, and a sound generating assembly installed in the first housing cavity and including two speakers, each speaker including a diaphragm, the two speakers engaging with each other along the axial direction to form a first acoustic cavity between the two speakers, the sound generating assembly and the first housing engaging with each other to form a second acoustic cavity between the sound generating assembly and the first housing, separated from the first acoustic cavity, the first housing is provided with a sound emission hole communicating with the first acoustic cavity and a pressure relief hole communicating with the second acoustic cavity, sound generated on one side of the diaphragms of the two speakers is output through the first acoustic cavity and the sound emission hole, and sound generated on the other side of the diaphragms of the two speakers is output through the second acoustic cavity and the pressure relief hole.

[0005] By installing two speakers inside the sound generation assembly, the sound pressure level of the sound generation assembly can be effectively improved, and furthermore, a higher volume effect can be achieved, whereby clearer sound can be heard by the user and the sound quality of the earphone can be effectively improved.

[0006] In some embodiments, the two speakers have the same acoustic characteristics and are coaxially installed along the axial direction.

[0007] In some embodiments, the sound generation assembly further includes an annular mounting bracket, and the two speakers respectively engage with both ends of the mounting bracket to form a first acoustic cavity. The mounting bracket is provided with a first sound guide hole that communicates the sound emission hole with the first acoustic cavity.

[0008] In some embodiments, the two speakers respectively include a voice coil, a magnetic circuit system, and a frame. The frame supports the diaphragm and the magnetic circuit system. The voice coil is connected to the diaphragm and is installed in the magnetic field formed by the magnetic circuit system. The frames of the two speakers respectively engage with the mounting bracket.

[0009] In some embodiments, the two speakers respectively include a voice coil, a magnetic circuit system, and a frame. The frame supports the diaphragm and the magnetic circuit system. The voice coil is connected to the diaphragm and is installed in the magnetic field formed by the magnetic circuit system. The frames of the two speakers engage with each other to form a first acoustic cavity. At least one of the frames of the two speakers is provided with a first sound guide hole that communicates the sound emission hole with the first acoustic cavity.

[0010] In some embodiments, the sides of the diaphragms of the two speakers opposite to their respective magnetic circuit systems are installed adjacent to each other, and the first acoustic cavity is formed between the diaphragms of the two speakers.

[0011] In some embodiments, the sound emission hole and the first sound guiding hole communicate with each other along the radial direction of the sound generating assembly. The sound emission hole and the first sound guiding hole are each strip-shaped, and the length direction of the sound emission hole and the first sound guiding hole is arranged along the circumferential direction of the sound generating assembly.

[0012] In some embodiments, the distance along the axial direction between the mounting edges of the diaphragms of the two speakers is 1.6 - 2.5 mm, the radial dimension of the first acoustic cavity is 7.5 - 9.5 mm, and the area of the sound emission hole and the first sound guiding hole is 5 - 18 mm 2 is.

[0013] In some embodiments, second sound guiding holes are respectively installed in the frames of the two speakers, and the second sound guiding holes communicate the corresponding side facing the magnetic circuit system of each diaphragm with the second acoustic cavity.

[0014] In some embodiments, the sides of the diaphragms of the two speakers facing the respective magnetic circuit systems share the second acoustic cavity and the decompression hole.

[0015] In some embodiments, the second acoustic cavity includes two sub-acoustic cavities separated from each other. In the first housing, decompression holes communicating with each sub-acoustic cavity are installed, and the sides of the diaphragms of the two speakers facing the respective magnetic circuit systems respectively communicate the corresponding sub-acoustic cavity with the decompression hole.

[0016] In some embodiments, there are a plurality of second sound guiding holes, which are installed at intervals along the circumferential direction of the sound generating assembly. A pad is installed in the frame at a position between two second sound guiding holes, and the distance from some of the second sound guiding holes to the decompression hole is smaller than the distance from the pad to the decompression hole.

[0017] In some embodiments, the distance from some of the second sound guiding holes to the decompression hole is 0.5 mm or less.

[0018] In some embodiments, the second sound guide hole and pad closest to the depressurization hole are positioned opposite each other along the radial direction of the sound generation assembly.

[0019] In some embodiments, one end of the magnetic circuit system opposite to each diaphragm is mounted to protrude from the frame, and the radial dimension of the protrusion of the magnetic circuit system from the frame is smaller than the radial dimension of the support position of the frame relative to the diaphragm.

[0020] In some embodiments, the ratio of the axial dimension of the sound generation assembly to the radial dimension of the support position of the frame relative to the diaphragm is 0.8 to 1.3.

[0021] In some embodiments, the sound generation assembly is provided with mounting bosses, and the first sound guide hole is mounted on the mounting bosses, and the mounting bosses abut against the first housing at the outer circumference of the sound discharge hole, thereby separating the first sound guide hole and the sound discharge hole from each other. Alternatively, the first housing is provided with mounting bosses, and the sound discharge hole is mounted on the mounting bosses, and the mounting bosses abut against the sound generation assembly at the outer circumference of the first sound guide hole, thereby separating the first sound guide hole and the sound discharge hole from each other.

[0022] In some embodiments, the sound generation assembly further includes a mounting bracket, a mounting boss located on the mounting bracket, and the mounting bracket further includes a notched annular bracket body connected to the mounting boss along the circumferential direction of the sound generation assembly, the bracket body having two first support surfaces facing each other along the axial direction, the outer end surfaces of the two frames on the sides adjacent to the diaphragm of each frame being supported by the corresponding first support surfaces, and the mounting bosses protrude from the bracket body along the axial direction and the radial direction of the sound generation assembly and are located outside the outer circumferential surfaces of the two frames.

[0023] In some embodiments, the bracket body includes a support portion and a position limiting portion, the position limiting portion being connected to the support portion, the first support base surface being installed on the support portion, the position limiting portion protruding from the first support base surface along the axial direction and fitted into the frame to limit the position of the frame along the radial direction of the sound generation assembly, or the bracket body being provided with a recess, a part of the frame being fitted into the recess to limit the position of the frame along the radial direction of the sound generation assembly.

[0024] In some embodiments, sealant is provided between the outer end faces of the two frames and the first support base surface, and between the inner circumferential surface of the mounting boss and the outer circumferential surfaces of the two frames.

[0025] In some embodiments, a first corner cut surface is provided at the corner of the frame near the connection point between the outer circumferential surface of the position limiting portion and the first support base surface to form a first adhesive storage groove, and a second corner cut surface is provided at the corner of the support portion near the connection point between the outer end surface of the frame and the outer circumferential surface of the frame to form a second adhesive storage groove.

[0026] In some embodiments, a third corner facet is provided at the corner of the mounting boss that is close to the outer circumferential surface of the two frames, forming a third adhesive receiving groove.

[0027] In some embodiments, the second and third corner cut surfaces are connected to each other.

[0028] In some embodiments, the frame is further provided with a second support surface, which is located inside the outer end surface of the frame along the radial direction of the sound generation assembly and is spaced apart from the outer end surface of the frame along the axial direction, the mounting edge of the diaphragm is supported by the second support surface, and at least a portion of the axial projection of the position limiting portion is on the second support surface.

[0029] In some embodiments, the mounting bracket is a molded plastic part, the radial thickness of the mounting boss is 0.2 to 0.7 mm, the mounting boss is positioned along the width direction of the first sound hole and includes a connecting bridge connected to the long side edge of the first sound hole, the first sound hole is divided by the connecting bridge into at least two first sub-sound holes spaced apart from each other along the length direction of the first sound hole.

[0030] In some embodiments, each of the two frames is provided with pads and sound holes spaced apart from each other along the circumferential direction of the sound generation assembly, the sound holes communicating the side of the corresponding diaphragm facing the respective magnetic circuit system with a second acoustic cavity, each frame and mounting bracket is provided with a position limiting structure that engages with each other, the position limiting structure restricts the position of the frame and mounting bracket along the circumferential direction of the sound generation assembly, the position limiting structures of the two frames are positioned opposite each other along the axial direction, the sound generation assembly is positioned along the axial direction and has a radial plane passing through the position limiting structure, the pads of each frame are positioned so as to be mirror symmetric with respect to the radial plane, and the sound holes of each frame are each mirror symmetric with respect to the radial plane.

[0031] In some embodiments, the earphone further includes an ear hook and a contact portion, the ear hook connecting the sound generating portion and the contact portion, and when worn, the sound generating portion and the contact portion form a clamping position on both sides of the user's helix, the sound generating portion is located in the concha cavity, the first housing includes a first rigid housing and a second rigid housing, the first rigid housing is connected to the ear hook, the first housing cavity is surrounded by the first rigid housing and the second rigid housing, and the sound vent is installed in the second rigid housing.

[0032] In some embodiments, the second rigid housing is provided with a bump that protrudes from the end face of the second rigid housing, and the first rigid housing is provided with a groove that is recessed from the end face of the first rigid housing, the bump is fitted into the groove, and a portion of the sound vent is installed on the bump.

[0033] In some embodiments, the mounting boss is located on the second rigid housing or the sound generation assembly, and a third support base is installed inside the first rigid housing, and the first rigid housing and the second rigid housing are fixed together by the mounting boss, with the third support base supporting the sound generation assembly.

[0034] In some embodiments, when the sound generation assembly and the second rigid housing are in contact with each other by mounting bosses, the end faces of the first rigid housing and the end faces of the second rigid housing maintain a constant gap along the direction of contact between the sound generation assembly and the second rigid housing.

[0035] In some embodiments, the axial direction is perpendicular to the direction of contact between the sound generating assembly and the second rigid housing, and each of the two speakers includes a voice coil, a magnetic circuit system, and a frame, the frame supporting the diaphragm and the magnetic circuit system, the voice coil being connected to the diaphragm and positioned within the magnetic field formed by the magnetic circuit system, the sides of the diaphragms of the two speakers opposite to the respective magnetic circuit systems being positioned adjacent to each other, a first acoustic cavity being formed between the diaphragms of the two speakers, the magnetic circuit system including a permeable cover positioned protruding from the frame and a magnetic material positioned within the permeable cover, and a third support base being positioned to support the permeable covers of the two speakers, respectively.

[0036] In some embodiments, the earphone further includes a contact portion and an ear hook, the ear hook connecting the sound generating portion and the contact portion, and when worn, the sound generating portion and the contact portion form a clamping position on both sides of the user's helix, the sound generating portion is located within the concha cavity, and the sound emission port and decompression port are each positioned mirror-symmetrically with respect to a plane of symmetry located along the length of the ear hook.

[0037] In some embodiments, the minimum distance between the sound emission hole and the decompression hole in the plane of symmetry is 6.5 to 10 mm.

[0038] In some embodiments, in the plane of symmetry, the decompression holes are positioned toward the earlobe, and the sound-emitting holes and decompression holes are spaced apart from each other by the contact area between the first housing and the ear.

[0039] In some embodiments, there is one sound vent, which is strip-shaped, and the plane of symmetry is positioned along the length of the sound vent and perpendicular to the axial direction.

[0040] In some embodiments, there is one decompression port, which is strip-shaped, and the plane of symmetry is aligned along the width direction of the decompression port and perpendicular to the axial direction.

[0041] In some embodiments, the decompression hole includes a first hole and a second hole along the longitudinal direction of the decompression hole, and a third hole connected between the first hole and the second hole, wherein the width of at least a portion of the first hole and the second hole is greater than the width of the third hole.

[0042] In some embodiments, the plane of symmetry is the plane of symmetry of the ear loops.

[0043] In some embodiments, the earphone further includes an ear hook and a contact portion, the ear hook connecting the sound generating portion and the contact portion, and when worn, the sound generating portion and the contact portion form a clamping position on both sides of the user's helix, the sound generating portion is located in the concha cavity, the first housing includes a first rigid housing, a second rigid housing and a first flexible body, the first housing cavity is surrounded by the first rigid housing and the second rigid housing, the first flexible body is placed on the outer wall of the second rigid housing and is used to contact the concha cavity, the plane on which the outermost annular line of the end face of the first flexible body is located is a first reference plane, the midpoint along the axis of the sound generating assembly or the axis of the sound generating assembly is located on the side of the first reference plane toward the first rigid housing and is parallel to the first reference plane.

[0044] In some embodiments, the midpoint along the axis of the sound generation assembly, or the distance from the axis to the first reference plane, is 0.4 to 4 mm.

[0045] In some embodiments, the sound generating unit is positioned within the concha cavity to maintain at least a portion of the ear canal open.

[0046] In some embodiments, the earphone includes a sound generating assembly comprising two speakers, each speaker comprising a diaphragm, the diaphragms of the two speakers being positioned adjacent to each other along the axial direction, the resonant peak frequencies of the diaphragms of the two speakers being 200-300 Hz, and the absolute difference between the resonant peak frequencies of the diaphragms of the two speakers being 50 Hz or less.

[0047] In some embodiments, the earphone includes a sound-generating assembly comprising two speakers, each speaker comprising a diaphragm, the two speakers engaging with each other along the axial direction, the diaphragms of the two speakers being positioned adjacent to each other, and the ratio of the maximum axial dimension to the maximum radial dimension of the sound-generating assembly being 0.8 to 1.3. This method allows the present invention to improve the assembly efficiency of the earphone.

[0048] To more clearly explain the technical means in the embodiments of the present application, the drawings necessary for describing the embodiments are briefly introduced below. Clearly, the drawings in the following description are only a few embodiments of the present application, and those skilled in the art can obtain other drawings based on these without requiring any creative effort. [Brief explanation of the drawing]

[0049] [Figure 1] This is a schematic diagram showing the state of the earphones of the present invention when they are worn in a person's ear. [Figure 2] Figure 1 is a schematic front view of the earphone configuration. [Figure 3] Figure 1 is a schematic diagram of the three-dimensional structure of the earphones. [Figure 4] Figure 1 is a schematic top view of the earphone configuration. [Figure 5] Figure 1 is a schematic diagram of the three-dimensional structure of the sound generation part of the earphone. [Figure 6] Figure 5 is a schematic front view of the sound generation unit. [Figure 7] Figure 6 is a schematic diagram of the cross-sectional structure of the sound generation unit along the AA cutting line. [Figure 8] Figure 6 is a schematic diagram of another cross-sectional structure along the AA cutting line of the sound generation unit. [Figure 9] Figure 5 is a schematic top view of the sound generation unit. [Figure 10] Figure 8 is a schematic side view of the structure of the sound generation assembly of the sound generation unit. [Figure 11] Figure 10 is a schematic diagram of the cross-sectional structure of the sound generation assembly along the PP cutting line. [Figure 12] Figure 8 is a schematic exploded view of the voice generation assembly. [Figure 13] Figure 8 is a schematic diagram of the three-dimensional structure of another exemplary sound generation assembly of the sound generation unit shown. [Figure 14] Figure 11 is a magnified schematic diagram of the local region Q of the speech generation assembly shown. [Figure 15] Figure 5 is a schematic side view of the sound generation unit. [Figure 16] Figure 15 is a schematic diagram of the cross-sectional structure of the sound generation unit along the cutting line JJ shown. [Figure 17] Figure 16 is a schematic top view of the sound generation assembly of the sound generation unit shown in Figure 16. [Figure 18] Figure 8 is another schematic side view of the structure of the sound generation assembly in the sound generation unit. [Figure 19] Figure 5 is a schematic diagram of the exploded structure of the sound generation unit. [Figure 20] Figure 5 is a schematic diagram of another disassembled structure of the sound generation unit. [Figure 21] Figure 15 is a schematic diagram of the cross-sectional structure of the sound generation unit along the cutting line UU shown in Figure 15. [Figure 22]Figure 15 is another schematic diagram of the pressure relief port in the sound generation unit. [Figure 23] Figure 5 is a schematic diagram of yet another exploded structure of the sound generation unit. [Figure 24] Figure 4 is a schematic diagram of the cross-sectional structure of the earphone along the cutting line VV shown. [Figure 25] This is a schematic diagram of the cross-sectional contour corresponding to the cutting line VV shown in Figure 24. [Figure 26] Figure 1 is a schematic diagram of the three-dimensional structure of the earphones when a tightening force is applied to them. [Figure 27] Figure 26 is a schematic diagram showing the change in the clamping force of the earphones. [Figure 28] Figure 26 is a schematic diagram showing the configuration of an earphone in which the tightening force is measured by a thin-film pressure sensor. [Figure 29] Figure 26 is a schematic diagram of the device used to measure the clamping force / tightening force of the earphones. [Figure 30] Figure 26 is a schematic diagram of another measuring device for measuring the clamping force / tightening force of earphones. [Figure 31] Figure 1 is a schematic diagram of the earphones equipped with a magnetic coupling matching structure. [Figure 32] Figure 31 is a schematic diagram showing the change in the clamping force of the earphones. [Figure 33] Figure 31 is a schematic diagram showing the change in clamping force when a tightening force is applied to the earphone. [Figure 34] Figure 2 is a schematic diagram of the cross-sectional structure of the earphone along the cutting lines I to I shown. [Figure 35] This is another schematic diagram of the cross-sectional contour corresponding to the cutting line V~V shown in Figure 24. [Figure 36] Figure 1 is another schematic diagram of the earphones shown. [Modes for carrying out the invention]

[0050] The present invention will be described in more detail below with reference to the drawings, with reference to specific embodiments. Similar elements in different embodiments are denoted by corresponding similarity numbers. In the following embodiments, many detailed descriptions are provided to better understand the present application. However, those skilled in the art will readily understand that in some cases some features may be omitted or replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid obscuring the core of the application by excessive description. Those skilled in the art will not need these related operations to be described in detail. Those skilled in the art will be able to fully understand the related operations based on the description in the specification and general technical knowledge of the art.

[0051] Furthermore, the characteristics, operations, or features described in the specification can be combined in any suitable manner to form various embodiments. In addition, each step or operation in the description of the method can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the order in the specification and drawings is merely for illustrating a particular embodiment and is not necessarily intended to be followed unless specifically stated that a particular order must be followed.

[0052] The numbers assigned to components in this specification, such as "1st," "2nd," etc., are merely for distinguishing the objects being described and do not have any order or technical meaning. Unless otherwise specified, "connection" and "linking" in this application include both direct and indirect connections.

[0053] As shown in Figure 1, the user's ear portion (EAR) may include physiological areas such as the external auditory canal E11, conchaeatocost E12, conchaeatoscaphelix E13, triangular fossa E14, antihelix E15, scaphoid fossa E16, helix E17, and antitragus E18. The external auditory canal E11 has a certain depth and extends to the tympanic membrane of the ear portion (EAR), but for ease of explanation, as shown in Figure 1, unless otherwise specified, in this application, the external auditory canal E11 specifically refers to the entrance opposite to the tympanic membrane (i.e., the ear canal). Furthermore, physiological areas such as the conchaeatocost E12, conchaeatoscaphelix E13, and triangular fossa E14 have a certain volume and depth, and the conchaeatocost E12 is in direct communication with the external auditory canal E11, that is, the aforementioned ear canal can be easily considered to be located at the bottom of the conchaeatocost E12.

[0054] Furthermore, the tragus E19 is located on the outer circumference of the external auditory canal of the ear EAR. Compared to areas such as the concha cavity E12, conchasnea E13, and triangular fossa E14, it has a certain depth and volume in three-dimensional space. That is, while these areas are recessed towards the posterior side of the ear EAR along the direction approaching the user's head, the tragus E19 protrudes towards the anterior side of the ear EAR along the direction opposite to the user's head. The "anterior side of the ear EAR" is a concept in contrast to the "posterior side of the ear EAR." The former refers to the side of the ear EAR opposite the head, as shown in Figure 1, for example, while the latter refers to the side of the ear EAR facing the head. Both refer to the user's ear EAR.

[0055] Furthermore, because there may be individual differences among different users, there may be dimensional differences in shape, size, and other aspects of the ear portion (EAR). To facilitate explanations and mitigate (and ultimately eliminate) individual differences among different users, a simulator including the head and its (left and right) ear portions (EAR), such as GRAS45BCKEMAR, can be manufactured based on ANSI:S3.36, S3.25, and IEC:603187 standards. Therefore, descriptions such as "the user is wearing the earphones," "the earphones are in the worn state," and "in the worn state" may refer to the earphones described in this application being attached to the ear portion (EAR) of the aforementioned simulator. Naturally, because there are individual differences among different users, there may be some differences between when the earphones are worn by a different user and when the earphones are attached to the ear portion (EAR) of the aforementioned simulator, but such differences should be acceptable.

[0056] The embodiments of the present application describe at least one exemplary structure of the earphone 1. As shown in Figure 1, Figure 1 shows the earphone 1 in a state where it is attached to the user's ear. The earphone 1 may be an ear cuff type earphone. As shown in Figures 1 to 4, the earphone 1 includes a sound generating unit 100 inserted into the user's concha E12, a contact unit 400 that abuts against the back of the user's ear, and an ear hook 300 connected to the sound generating unit 100 and the contact unit 400. The ear hook 300 can bypass the user's helix E17, and the sound generating unit 100 and the contact unit 400 form a clamping state on both sides of the user's helix. The sound generating unit 100 is a sound playback device that converts electrical signals into sound signals and plays them back to the wearer. The contact unit 400 forms a clamping state with the sound generating unit 100 so that the entire earphone 1 is clamped and attached to the user's helix. In some embodiments, components such as a battery and a circuit board may be installed inside the contact portion 400. Naturally, the contact portion 400 does not necessarily need to have a battery installed, as the battery is installed inside the sound generating unit 100.

[0057] In some embodiments, as shown in Figures 5 and 6, the sound generating unit 100 may be provided with a sound emission hole 111 and a pressure reducing hole 112. The sound emission hole 111 may be located at the bottom of the sound generating unit 100, and the pressure reducing hole 112 may be located on the side of the sound generating unit 100 that is close to the ear hook 300. As shown in Figure 7, the sound generating unit 100 includes a first housing 10 and a sound generating assembly 20. The first housing 10 forms a first housing cavity 110, and the sound generating assembly 20 is installed inside the first housing cavity 110.

[0058] As shown in Figure 7, the sound generation assembly 20 includes two speakers 21. Each speaker 21 includes a diaphragm 22. The two speakers 21 engage with each other along the axial direction (i.e., the direction of axis Z) to form a first acoustic cavity 201 between the two speakers 21. The sound generation assembly 20 and the first housing 10 engage with each other to form a first acoustic cavity 201 and a second acoustic cavity 202 separated from each other between the sound generation assembly 20 and the first housing 10. The first housing 10 is provided with a sound emission hole 111 communicating with the first acoustic cavity 201 and a depressurization hole 112 communicating with the second acoustic cavity 202. Sound generated on one side of the diaphragm 22 of the two speakers 21 is output through the first acoustic cavity 201 and the sound emission hole 111, and sound generated on the other side of the diaphragm 22 of the two speakers 21 is output through the second acoustic cavity 202 and the depressurization hole 112. The axial direction may be the direction indicated by the central axis Z of the sound generation assembly 20, and the central axis Z may pass through, for example, the geometric center of the sound generation assembly 20 and the geometric centers of the diaphragms 22 of the two speakers 21, and the central axis Z may be the central axis of the magnetic circuits of the two speakers 21.

[0059] For a speaker 21 that generates sound, sound pressure level is an important parameter for evaluating its performance. Sound pressure level is typically used to quantify and compare the strength of sound by comparing the sound pressure levels emitted from different sound sources. Sound pressure level is an indicator of the loudness of sound, and it represents the logarithm of the ratio of the effective value of sound pressure to the reference value. The specific formula is as follows:

[0060]

number

[0061] In the formula, SPL is the sound pressure level, P is the sound pressure generated when speaker 21 is operating, and Pref is the reference sound pressure. When only one speaker 21 is installed in the sound generation assembly 20, the sound pressure generated when speaker 21 is operating is P. Under the same conditions, when two speakers 21 are installed in the sound generation assembly 20, the sound pressure generated when speaker 21 is operating is 2P. Based on the above formula, the difference in sound pressure levels between one speaker 21 and two speakers 21 is as follows.

[0062]

number

[0063] As can be seen from the above estimation, compared to the case where only one speaker 21 is installed, the sound generation assembly 20 can effectively improve the sound pressure level of the sound generation assembly 20 by engaging two speakers 21 along the axial direction (i.e., the direction of axis Z) and forming a first acoustic cavity 201 between the two speakers to generate sound, thereby achieving a higher volume effect, which in turn allows the user to hear clearer sound and effectively improves the sound quality of the earphone 1.

[0064] Furthermore, by engaging the two speakers 21, the diaphragms 22 of the two speakers 21 can face each other to form a first acoustic cavity 201, where the diaphragm 22 vibrates and pushes air to generate sound waves that the user hears. The second acoustic cavity 202 communicates with the pressure relief hole 112 and also communicates with the outside, and is used to balance the air pressure inside the first housing 10. By engaging the two speakers 21 to form the first acoustic cavity 201, and assembling the two speakers 21 as a single unit within the first housing 10 after assembly, the structure can be simplified and assembly is easy. Moreover, by forming a second acoustic cavity 202 between the sound generation assembly 20 and the first housing 10, which is separate from the first acoustic cavity 201, there is no need to form the second acoustic cavity 202 with additional structures or parts, the structure can be simplified, the difficulty of assembling the earphone 1 can be reduced, and the assembly efficiency of the earphone 1 can be improved.

[0065] Preferably, the two speakers 21 of the sound generation assembly 20 have the same acoustic characteristics and are installed coaxially along the axial direction (i.e., the direction of axis Z). Having the same acoustic characteristics as the two speakers 21 means that when driven by the same drive signal, the sound pressures generated by the two speakers 21 are the same or close, specifically, the ratio of the sound pressure difference between them to the minimum sound pressure is 10% or less. Installing two speakers 21 with the same acoustic characteristics and installing them coaxially along the axial direction (i.e., the direction of axis Z) is advantageous for improving the sound quality of the sound generation assembly 20.

[0066] Preferably, as shown in Figure 7, the sound generation assembly 20 further includes an annular mounting bracket 27, and two speakers 21 each engage with both ends of the mounting bracket 27 to form a first acoustic cavity 201, and the mounting bracket 27 is provided with a first sound guide hole 203 that connects the sound emission hole 111 to the first acoustic cavity 201.

[0067] By installing an annular mounting bracket 27, engagement of the two speakers 21 is achieved, and a first acoustic cavity 201 is formed. By installing a first sound guide hole 203 in the mounting bracket 27 and connecting the sound emission hole 111 with the first acoustic cavity 201, sound waves in the first acoustic cavity 201 are transmitted sequentially through the first sound guide hole 203 and the sound emission hole 111 to the user's ear (EAR). This effectively simplifies the structure, effectively improves the compactness and integration of the sound generation assembly 20, is advantageous in reducing the difficulty of assembly, and is advantageous in improving assembly efficiency.

[0068] Preferably, in some embodiments, as shown in Figure 7, each of the two speakers 21 includes a voice coil 23, a magnetic circuit system 24, and a frame 25, the frame 25 supporting the diaphragm 22 and the magnetic circuit system 24, the voice coil 23 being connected to the diaphragm 22 and positioned within the magnetic field formed by the magnetic circuit system 24, and the frames 25 of the two speakers 21 engaging with mounting brackets 27 to form a first acoustic cavity 201 between the diaphragms 22 of the two speakers 21 and the mounting brackets 27. The voice coil 23 may be cylindrical, and the axis of the voice coil 23 may be the central axis Z of the sound generation assembly 20, and the voice coil 23 moves in the axial direction (i.e., in the direction of axis Z) under the influence of the magnetic field formed by the magnetic circuit system 24, driving the diaphragm 22 to vibrate and generate sound waves.

[0069] The frames 25 of the two speakers 21 are engaged with the mounting bracket 27 to assemble the sound generation assembly 20, and the frames 25 are positioned to support the diaphragm 22 and magnetic circuit system 24, resulting in a simple and compact structure, effectively reducing the difficulty of assembly and effectively improving assembly efficiency.

[0070] Figure 7 shows how the frames 25 of the two speakers 21 engage with the mounting bracket 27. Preferably, in some embodiments, the mounting bracket 27 may be omitted, and the frames 25 of the two speakers 21 may be engaged with each other to form a first acoustic cavity 201. In this case, at least one of the frames 25 of the two speakers 21 is provided with a first sound guide hole 203 that connects the sound outlet 111 to the first acoustic cavity 201. For example, both frames 25 may be provided with sound outlets 111, or each of the two frames 25 may be provided with a portion of the sound outlet 111, and a complete sound outlet 111 may be formed after assembly. The engagement of the two frames 25 enables engagement of the two speakers 21, forms the first acoustic cavity 201, and eliminates the need to install additional components for connection, simplifying the structure, reducing manufacturing costs, and improving assembly difficulty and efficiency.

[0071] Preferably, as shown in Figure 7, the sides of the diaphragms 22 of the two speakers 21 opposite to the respective magnetic circuit systems 24 are installed adjacent to each other, and the first acoustic cavity 201 is formed between the diaphragms 22 of the two speakers 21.

[0072] The diaphragms 22 of the two speakers 21 are driven by their respective voice coils 23 to vibrate, generating sound waves that the user hears on the opposite side of their respective magnetic circuit systems 24. By positioning the opposite sides of the diaphragms 22 of the two speakers 21 adjacent to each other, both speakers 21 generate sound waves within the first acoustic cavity 201, effectively simplifying the structure of the sound generation assembly 20 and making it easier to reduce the volume of the first acoustic cavity 201. This results in a more compact structure for the sound generation assembly 20, which is advantageous for reducing the volume of the earphones 1 and improving the wearing comfort of the earphones 1. Furthermore, by having the two speakers 21 share the first acoustic cavity 201, the resonance peak of the first acoustic cavity 201 shifts to a higher frequency, which is advantageous for improving the sound quality of the earphones 1.

[0073] As shown in Figure 7, a second sound guide hole 204 is installed in each of the frames 25 of the two speakers 21, and the second sound guide hole 204 connects the side of the corresponding diaphragm 22 facing the respective magnetic circuit system 24 to the second acoustic cavity 202.

[0074] The sides of the diaphragms 22 of the two speakers 21 facing the magnetic circuit system 24 communicate with the second acoustic cavity 202 via the second sound guide hole 204, and further communicate with the outside via the pressure reduction hole 112, thereby balancing the air pressure inside the first housing 10, ensuring sound quality, and also simplifying the structure of the sound generation assembly 20, making assembly easy.

[0075] Preferably, in some embodiments, as shown in Figure 7, the sides of the diaphragms 22 of the two speakers 21 facing the respective magnetic circuit systems 24 share the second acoustic cavity 202 and the pressure relief holes 112. By setting it up in this way, the number of pressure relief holes 112 can be reduced, enhancing the aesthetics of the earphone 1, which is advantageous in ensuring the consistency of the acoustic characteristics of the two speakers 21 and improving the sound quality of the sound generation assembly 20. In addition, by having the two speakers 21 share the second acoustic cavity 202, sealing is made easier and the volume of the first housing 10 can be reduced, making the structure of the earphone 1 more compact, effectively reducing the volume of the earphone 1, which is advantageous in improving the wearing comfort of the earphone 1.

[0076] Preferably, in some other embodiments, as shown in Figure 8, the second acoustic cavity 202 includes two separate sub-acoustic cavities 202a, and the first housing 10 is provided with decompression holes 112 communicating with each sub-acoustic cavity 202a, and the sides of the diaphragms 22 of the two speakers 21 facing the respective magnetic circuit systems 24 are each connected to the corresponding sub-acoustic cavity 202a and the decompression hole 112. By separating the two sub-acoustic cavities 202a, the audio signals of the two speakers 21 can not be perfectly matched, that is, the earphone 1 has a certain frequency division function to adapt to different listening environments and sound quality needs, and the two separated sub-acoustic cavities 202a can reduce mutual interference between the two speakers 21, thereby improving the effectiveness and reliability of the operation of the two speakers 21 and contributing to improved sound quality of the earphone 1.

[0077] Preferably, as shown in Figures 9 and 10, the sound emission holes 111 and the first sound guide holes 203 communicate with each other along the radial RD of the sound generation assembly 20, the sound emission holes 111 and the first sound guide holes 203 are each strip-shaped, and the longitudinal directions of the sound emission holes 111 and the first sound guide holes 203 are positioned along the circumferential direction of the sound generation assembly 20. The radial RD of the sound generation assembly 20 is perpendicular to the axial direction (i.e., the direction of axis Z), and the circumferential direction of the sound generation assembly 20 is the direction surrounding the axial direction (i.e., the direction of axis Z).

[0078] By making the sound emission holes 111 and the first sound guide holes 203 strip-shaped and aligning their longitudinal direction with the circumferential direction of the sound generation assembly 20, the area of ​​the sound emission holes 111 and the first sound guide holes 203 is secured, while reducing the dimensions of the sound emission holes 111 and the first sound guide holes 203 in the axial direction (i.e., in the direction of axis Z), thereby improving the compactness of the structure of the sound generation assembly 20, reducing the volume of the earphone 1, and improving the wearing comfort of the earphone 1.

[0079] In this application, any description regarding a certain physical / mathematical parameter (such as distance, ratio, area, length, width, thickness, etc.) being within a certain numerical range may include the endpoint values of the numerical range. For example, when a certain distance is A to B, the value of this distance may be A, may be B, or may be a certain value between A and B. Therefore, in the following content, any description regarding a numerical range "being" shall be understood and applied in accordance with the above expression.

[0080] Preferably, as shown in FIG. 11, the interval distance Z22 along the axial direction (i.e., the direction of axis Z) of the mounting edge of the diaphragm 22 of the two speakers 21 is 1.6 to 2.5 mm. For example, it may be 1.7 mm, 1.9 mm, 2.1 mm, 2.3 mm, etc., but other numerical values may also be possible. The mounting edge of the diaphragm 22 is the edge attached to the frame 25. The radial dimension R21 of the first acoustic cavity 201 is 7.5 to 9.5 mm. For example, it may be 7.8 mm, 8.1 mm, 8.5 mm, 8.8 mm, 9.1 mm, etc., but other numerical values may also be possible. Preferably, the areas of the sound emitting hole 111 and the first sound guiding hole 203 are each 5 to 18 mm 2 and may also be possible. Preferably, the areas of the sound emitting hole 111 and the first sound guiding hole 203 are each 9 to 20 mm 2 and may also be possible. For example, the areas of the sound emitting hole 111 and the first sound guiding hole 203 are each 6 mm 2 , 8 mm 2 , 9 mm 2 , 10 mm 2 , 12 mm 2 , 14 mm 2 , 17 mm 2 , 19 mm 2 etc., but other numerical values may also be possible. By reasonably setting the above dimensions, the compactness of the structure of the sound generation assembly 20 is improved, and the resonance peak of the first acoustic cavity 201 can move to a higher frequency, which is advantageous for improving the sound quality of the earphone 1.

[0081] Preferably, as shown in Figure 11, one end of each magnetic circuit system 24 opposite to the diaphragm 22 is installed to protrude from the frame 25, and the radial dimension R22 of the protruding portion of the magnetic circuit system 24 relative to the frame 25 is smaller than the radial dimension R23 of the support position of the frame 25 relative to the diaphragm 22. By installing it in this manner, the outer contour of the sound generation assembly 20 becomes closer to spherical, making it easier to improve the compactness and integration of the structure and effectively reducing the volume of the sound generation assembly 20. The first housing cavity 110 may also be installed to be close to spherical in shape to match the appearance of the earphone 1, and by installing the sound generation assembly 20 in this manner, the sound generation assembly 20 can be easily assembled inside the first housing cavity 110, effectively improving the space utilization rate of the first housing cavity 110 and effectively improving the assembly efficiency of the earphone 1. Furthermore, by positioning the outer contour of the sound generation assembly 20 to be closer to a spherical shape, it can better conform to the shape of the conchaecular cavity E12, and more effectively improve the space utilization rate within the conchaecular cavity E12 by making full use of the space within the conchaecular cavity E12.

[0082] Preferably, as shown in Figure 11, the ratio of the axial dimension Z21 of the sound generation assembly 20 to the radial dimension R23 of the support position of the frame 25 relative to the vibrating diaphragm 22 is 0.8 to 1.3, and for example, this ratio may be 0.9, 1, 1.1, etc. Preferably, the ratio of the maximum axial dimension Z21 of the sound generation assembly 20 to the maximum radial dimension R20 is 0.8 to 1.3, and this ratio may be 0.9, 1, 1.1, etc. In this way, the axial dimension Z21 of the sound generation assembly 20 and the radial dimension R23 of the support position of the frame 25 relative to the vibrating diaphragm 22 are sufficiently close, thereby the outer contour of the sound generation assembly 20 is closer to spherical, making it easier to fit into the first housing cavity 110 which is close to spherical, effectively improving the space utilization rate of the first housing cavity 110, effectively reducing the difficulty of assembly, and effectively improving assembly efficiency. For example, if the axial dimension Z21 of the sound generation assembly 20 is 9.5 mm and the radial dimension R23 of the support position of the frame 25 relative to the diaphragm 22 is 8.1 mm, the ratio of the two is approximately 1.17. Also, for example, if the axial dimension Z21 of the sound generation assembly 20 is 9.5 mm and the radial dimension R23 of the support position of the frame 25 relative to the diaphragm 22 is 8.8 mm, the ratio of the two is approximately 1.08.

[0083] Preferably, in some embodiments, as shown in Figures 11 and 12, the sound generation assembly 20 is provided with a mounting boss 271, the first sound conduit 203 is mounted on the mounting boss 271, and the mounting boss 271 abuts against the first housing 10 at the outer circumference of the sound outlet 111 (as shown in Figure 7), thereby separating the first sound conduit 203 and the sound outlet 111 from each other in the second acoustic cavity 202. Naturally, in some other embodiments, the mounting boss 271 may be mounted on the first housing 10 instead of the sound generation assembly 20. Specifically, the first housing 10 is provided with a mounting boss 271, the sound outlet 111 is mounted on the mounting boss 271, and the mounting boss 271 abuts against the sound generation assembly 20 at the outer circumference of the first sound conduit 203, thereby separating the first sound conduit 203 and the sound outlet 111 from each other in the second acoustic cavity 202.

[0084] By installing the mounting boss 271, the connection between the first housing 10 and the sound generation assembly 20 is realized, and the first sound guide hole 203 and sound discharge hole 111 are separated from the second acoustic cavity 202, simplifying the structure and improving the separation effect. This prevents the sound output from the first sound guide hole 203 and sound discharge hole 111 from being affected by the pressure reduction through the pressure reduction hole 112 of the second acoustic cavity 202, thereby improving the sound quality of the earphone 1.

[0085] Preferably, as shown in Figures 11 and 12, the sound generation assembly 20 further includes a mounting bracket 27, and a mounting boss 271 is located on the mounting bracket 27. The mounting bracket 27 further includes a notched annular bracket body 272 connected to the mounting boss 271 along the circumferential direction of the sound generation assembly 20. The bracket body 272 is provided with two first support surfaces 2701 facing each other along the axial direction (i.e., the direction of axis Z). The outer end faces 250 of each of the two frames 25 on the side close to the diaphragm 22 are each supported by the corresponding first support surfaces 2701, and the mounting bosses 271 each protrude from the bracket body 272 along the axial direction (i.e., the direction of axis Z) and the radial direction RD of the sound generation assembly 20, and are located outside the outer circumferential surfaces of the two frames 25. By installing in this manner, the structural strength of the mounting boss 271 is ensured, sufficient space is secured around the mounting boss 271 to install the first sound guide hole 203, and the stability of the structure is improved as the two frames 25 are each supported by the corresponding first support base surface 2701, thereby effectively improving the overall stability and reliability of the sound generation assembly 20.

[0086] Preferably, as shown in Figures 10 and 12, the mounting bracket 27 may be a plastic molded product, and the radial thickness R24 of the mounting boss 271 is 0.2 to 0.7 mm. Preferably, the radial thickness R24 of the mounting boss 271 may be 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, etc., but other values ​​may also be used. The mounting boss 271 is installed along the width direction of the first sound guide hole 203 and includes a connecting bridge 2723 connected to the long side hole edge 111c of the first sound guide hole 203, and the first sound guide hole 203 is divided by the connecting bridge 2723 into at least two first sub-sound guide holes installed spaced apart from each other along the length direction of the first sound guide hole 203. The mounting bracket 27 may be manufactured by, for example, injection molding, compression molding, etc., but may also be manufactured by other molding methods. Naturally, in some other embodiments, as shown in Figure 13, the connecting bridge 2723 does not need to be installed on the mounting boss 271, thus allowing for a larger area of ​​the first sound hole 203. Compared to the example shown in Figure 12, the circumferential dimension of the first sound hole 203 in Figure 13 can be appropriately reduced while maintaining structural strength, but by omitting the connecting bridge 2723, the area of ​​the first sound hole 203 can still be improved, and furthermore, sound quality can be improved.

[0087] By rationally setting the radial thickness R24 of the mounting boss 271, space for the first sound guide hole 203 is secured, and the radial dimension R20 of the sound generation assembly 20 is not excessively increased, thereby achieving miniaturization of the entire earphone 1. The installation of the connecting bridge 2723 facilitates the molding of the mounting bracket 27, effectively improving the connection strength of the mounting boss 271, thereby effectively improving the effectiveness and reliability of the operation of the sound generation assembly 20.

[0088] Preferably, in some embodiments, as shown in Figures 11 and 12, the bracket body 272 includes a support portion 2721 and a position limiting portion 2722, the position limiting portion 2722 being connected to the support portion 2721, the first support base surface 2701 being mounted on the support portion 2721, and the position limiting portion 2722 protruding from the first support base surface 2701 along the axial direction (i.e., the direction of axis Z) and fitted into the frame 25 to limit the position of the frame 25 along the radial direction RD of the sound generation assembly 20.

[0089] Naturally, in some other embodiments, the bracket body 272 may be provided with a recess (not shown). In other words, the position limiting portion 2722 is recessed rather than protruding, thereby forming a recess into which a portion of the frame 25 is fitted, limiting the position of the frame 25 along the radial RD of the sound generation assembly 20.

[0090] By installing the position limiting portion 2722 or recess, the frame 25 is restricted in the radial direction RD of the sound generation assembly 20, resulting in a simple and stable structure, easy assembly and disassembly, effectively improving the structural stability of the sound generation assembly 20 and improving assembly efficiency.

[0091] Preferably, as shown in Figures 11 and 12, sealant 28 is installed between the outer end surfaces 250 of the two frames 25 and the first support base surface 2701, and between the inner circumferential surface of the mounting boss 271 and the outer circumferential surfaces of the two frames 25. By installing sealant 28 in the above positions, the isolation effect of the first acoustic cavity 201 can be effectively improved, thereby improving the sound quality of the earphone 1. The sealant 28 has excellent elasticity, and when assembling and connecting the mounting boss 271 and the first housing 10, the sealant 28 generates a certain elastic deformation, allowing the mounting boss 271 and the first housing 10 to be more tightly fitted together. This improves the stability and sealing of the connection between the mounting boss 271 and the first housing 10, which is advantageous for improving the sound quality of the earphone 1.

[0092] Preferably, as shown in Figures 11 and 14, a first corner cut surface 251 is provided at the corner of the frame 25 near the connection point between the outer circumferential surface of the position limiting portion 2722 and the first support base surface 2701 to form a first adhesive storage groove 252, and a second corner cut surface 2702 is provided at the corner of the support portion 2721 near the connection point between the outer end surface 250 of the frame 25 and the outer circumferential surface of the frame 25 to form a second adhesive storage groove 2703.

[0093] By providing a first corner cut surface 251 and a second corner cut surface 2702 to form a first adhesive storage groove 252 and a second adhesive storage groove 2703, the amount of sealant 28 that can be stored is effectively increased, improving the sealing effect and separation effect, while effectively reducing the leakage of adhesive. This effectively reduces the possibility of interference with other components and is advantageous in reducing the difficulty of assembly.

[0094] Preferably, as shown in Figure 11, a third corner cut surface 2704 is provided at the corner of the mounting boss 271 adjacent to the outer circumferential surfaces of the two frames 25 to form a third adhesive storage groove 2705. The provision of the third corner cut surface 2704 can further improve the amount of adhesive that can be contained and the separation effect of the first acoustic cavity 201. Preferably, the second corner cut surface 2702 and the third corner cut surface 2704 are connected to each other, thereby allowing the second adhesive storage groove 2703 formed by the second corner cut surface 2702 and the third adhesive storage groove 2705 formed by the third corner cut surface 2704 to communicate with each other, and furthermore, adhesive can be applied continuously during application, effectively simplifying the process and improving assembly efficiency.

[0095] Preferably, as shown in Figures 11 and 14, a second support surface 253 is further installed on the frame 25, the second support surface 253 is located inside the outer end surface 250 of the frame 25 along the radial direction RD of the sound generation assembly 20 and is installed spaced apart from the outer end surface 250 of the frame 25 along the axial direction (i.e., the direction of axis Z), the mounting edge of the vibrating membrane 22 is supported by the second support surface 253, and at least a portion of the projection of the position limiting portion 2722 along the axial direction (i.e., the direction of axis Z) is on the second support surface 253.

[0096] The second support base surface 253 is installed to support the diaphragm 22, and by positioning the second support base surface 253 inside the outer end surface 250 of the frame 25 along the radial RD of the sound generation assembly 20, it is advantageous to improve the connection stability of the diaphragm 22, thereby improving the reliability of the operation of the diaphragm 22. The position limiting portion 2722 is installed such that at least a portion of its projection along the axial direction (i.e., the direction of axis Z) is on the second support base surface 253, which is advantageous to rationally utilize space, improve space utilization efficiency, ensure connection stability, and improve the dimensions of the first acoustic cavity 201 in the radial RD of the sound generation assembly 20, thereby advantageous to improving the sound quality of the earphone 1.

[0097] Preferably, as shown in Figures 15 and 17, there are multiple second sound guide holes 204, spaced apart along the circumferential direction of the sound generation assembly 20, and a pad 26 is installed on the frame 25, located between two of the second sound guide holes 204. The distance from some of the second sound guide holes 204 to the decompression holes 112 is smaller than the distance from the pad 26 to the decompression holes 112. The pad 26 receives an electrical signal so that the speaker 21 performs the corresponding operation. By installing multiple second sound guide holes 204 along the circumferential direction of the sound generation assembly 20, the acoustic path of the sound output through the decompression holes 112 can be shortened, which is advantageous for improving the utilization rate of the volume of the second acoustic cavity 202, which is advantageous for improving decompression efficiency, and which is advantageous for improving the sound quality of the earphone 1. The cross section corresponding to the cutting line U~U shown in Figure 15 is the reference cross section SF.

[0098] Preferably, the distance from some of the second sound guide holes 204 to the pressure reduction holes 112 is 0.5 mm or less. More preferably, this distance is 0.3 mm or less. If the distance from the second sound guide holes 204 to the pressure reduction holes 112 is too large, the pressure reduction performance will decrease, thereby affecting the sound quality of the earphone 1. By rationally setting the distance from some of the second sound guide holes 204 to the pressure reduction holes 112, the pressure reduction efficiency is effectively improved, which is advantageous for improving the sound quality of the earphone 1.

[0099] Preferably, as shown in Figure 16, the second sound guide hole 204 and the pad 26, which are closest to the depressurization hole 112, are positioned opposite each other along the radial RD of the sound generation assembly 20. This arrangement prevents interference between the operation of the pad 26 and the depressurization operation of the earphone 1, which is advantageous for improving the depressurization performance of the earphone 1 and for improving the sound quality of the earphone 1.

[0100] As shown in Figures 16 and 17, specifically, the two frames 25 are each fitted with a pad 26 and a second sound guide hole 204, spaced apart from each other along the circumferential direction of the sound generation assembly 20. As shown in Figures 12 and 18, each frame 25 and mounting bracket 27 are fitted with mutually engaging position limiting structures 200a and 200b, which limit the position of the frame 25 and mounting bracket 27 along the circumferential direction of the sound generation assembly 20, and the position limiting structures 200a and 200b of the two frames 25 are fitted opposite each other along the axial direction (i.e., the direction of axis Z). Preferably, as shown in Figures 17 and 18, the sound generation assembly 20 is installed along the axial direction (i.e., the direction of axis Z) and has a radial plane RF passing through the position limiting structures 200a and 200b, the pads 26 of each frame 25 are installed so as to be mirror-symmetric with respect to the radial plane RF, and the sound guide holes of each frame 25 are each mirror-symmetric with respect to the radial plane RF.

[0101] The position-restricting structures 200a and 200b restrict the position of the two frames 25 along the circumferential direction of the sound generation assembly 20, preventing the two speakers 21 from rotating relative to each other, and effectively improving the structural stability and reliability of the sound generation assembly 20. At the same time, by positioning the pads 26 and second sound guide holes 204 of each frame 25 so as to be mirror-symmetric with respect to the radial plane RF, the directivity of the pads 26 of the two frames 25 matches the directivity of the second sound guide holes 204, thereby improving the consistency of the acoustic characteristics of the two speakers 21 in the first housing cavity 110, which is advantageous for improving the sound quality of the earphone 1. Furthermore, by positioning the structures of the two frames 25 with high consistency, the two speakers 21 can share the same frame 25 design, effectively reducing material and manufacturing costs.

[0102] Preferably, there is only one set of position limiting structures 200a and 200b. By installing them in this manner, the frame 25 is mirror-symmetric with respect to the radial plane RF, and when the two frames 25 are mounted, the sides on which the position limiting structure 200a is installed are mounted facing each other. Accordingly, the pads 26 of each frame 25 are mounted facing each other and located on the same side of the sound generation assembly 20. Furthermore, the directivity of the pads 26 of the two speakers 21 matches, thereby improving the consistency of the acoustic characteristics of the two speakers 21 in the first housing cavity 110, which is advantageous for improving the sound quality of the earphone 1.

[0103] Preferably, as shown in Figures 7, 19, and 20, the first housing 10 may include a first rigid housing 11 and a second rigid housing 12, the first rigid housing 11 being connected to the ear hook 300, the first housing cavity 110 being surrounded by the first rigid housing 11 and the second rigid housing 12, and the sound vent 111 being installed in the second rigid housing 12.

[0104] By positioning the first rigid housing 11 to connect to the ear hook 300 and positioning the sound vent 111 in the second rigid housing 12, the integrity of the sound vent 111 can be effectively ensured, the possibility of interference with the sound vent 111 can be reduced, the stability and reliability of the sound vent 111's operation can be improved, the difficulty of aligning the first rigid housing 11 and the second rigid housing 12 can be reduced, the difficulty of assembling the sound generation assembly 20 can be reduced, and the assembly efficiency of the sound generation assembly 20 can be improved. By positioning the sound vent 111 in this way, it is not necessary to penetrate both the first rigid housing 11 and the second rigid housing 12, the surface of the sound vent 111 is not flat, and furthermore, it is possible to avoid affecting the mounting of the sound-tuning mesh and steel mesh.

[0105] Preferably, as shown in Figures 19 and 20, the second rigid housing 12 is provided with a bump 123 that protrudes from the end face 122 of the second rigid housing 12, and the first rigid housing 11 is provided with a groove 113 that is recessed from the end face 114 of the first rigid housing 11. The bump 123 is fitted into the groove 113, and a portion of the sound vent hole 111 is installed on the bump 123. By installing the bump 123 and the groove 113, a connection is made between the first rigid housing 11 and the second rigid housing 12, and by installing a portion of the sound vent hole 111 on the bump 123, the stability of the connection between the first rigid housing 11 and the second rigid housing 12 is ensured, and the sound vent hole 111 is given sufficient length, which is advantageous for improving the sound venting effect of the earphone 1 and for improving the sound quality of the earphone 1.

[0106] Preferably, as shown in Figures 19 and 20, the mounting boss 271 is located on the voice generation assembly 20. Of course, the mounting boss 271 may also be located on the second rigid housing 12. A third support base 115 is installed inside the first rigid housing 11, and the third support base 115 supports the voice generation assembly 20, thereby fixing the first rigid housing 11 and the second rigid housing 12 together. The voice generation assembly 20 and the second rigid housing 12 then come into contact with each other via the mounting boss 271. This configuration simplifies the structure, simplifies the assembly process, reduces the difficulty of assembly, and improves assembly efficiency.

[0107] Preferably, as shown in Figure 7, when the sound generation assembly 20 and the second rigid housing 12 are in contact with each other by the mounting boss 271, the end face 114 of the first rigid housing 11 and the end face 122 of the second rigid housing 12 maintain a constant gap along the direction of contact between the sound generation assembly 20 and the second rigid housing 12. By installing them in this manner, when the first rigid housing 11 and the second rigid housing 12 are in contact with the sound generation assembly 20 to position and mount it, a constant gap is maintained between the first rigid housing 11 and the second rigid housing 12, which can compensate for assembly errors of the sound generation assembly 20, thereby effectively improving the accuracy and stability of positioning and mounting of the sound generation assembly 20. Furthermore, during the manufacturing and assembly process, the mounting boss 271 contacts the sound generation assembly 20 and the second rigid housing 12, and then engages the first rigid housing 11 and the second rigid housing 12, thereby pressing and further fixing the sound generation assembly 20 and the second rigid housing 12, effectively improving the contact effect and enhancing the connection stability of the earphone 1.

[0108] Preferably, the axial direction (i.e., the direction of axis Z) may be perpendicular to the direction of contact between the sound generation assembly 20 and the second rigid housing 12. Preferably, the magnetic circuit system 24 includes a permeable cover 241 mounted protruding from the frame 25 and a magnetic body 242 mounted within the permeable cover 241. As shown in Figures 7 and 19, the third support base surface 115 is mounted to support the permeable covers 241 of the two speakers 21, respectively. This mounting securely attaches and fixes the sound generation assembly 20 without affecting the vibration of the diaphragm 22, resulting in a stable structure and an advantage in extending the service life of the earphone 1.

[0109] Preferably, as shown in Figures 9 and 15, the sound-emitting holes 111 and the depressurizing holes 112 are each positioned mirror-symmetrically with respect to a plane of symmetry SF that is installed along the longitudinal direction of the ear hook 300.

[0110] By installing sound-emitting holes 111 and pressure-reducing holes 112 that are mirror-symmetrical with respect to the symmetry plane SF, the aesthetic appeal of the earphone 1 is improved, and the earphone 1 can be used for both the left and right ears, effectively improving the fit of the earphone 1.

[0111] Preferably, as shown in Figure 20, the earphone 1 further includes a microphone 30, and the first housing 10 is provided with an inlet 101 that guides external sound to the microphone 30, and the inlet 101 is positioned to intersect the plane of symmetry SF. The microphone 30 can collect sound, thereby allowing the earphone 1 to be adapted to different usage scenarios such as music playback and phone calls. By positioning the inlet 101 to intersect the plane of symmetry SF, the effectiveness of the microphone 30 in collecting sound through the inlet 101 is ensured, and the earphone 1 can be adapted for use in both the left and right ear, effectively improving the suitability of the earphone 1. The cross section corresponding to the cutting line V~V in Figure 4 is the plane of symmetry SF.

[0112] Preferably, the number of microphones 30 may be one or more, for example, one, two, or four. When there is one microphone 30, it is positioned intersecting the symmetry plane SF. When there are multiple microphones 30, they are distributed symmetrically with respect to the symmetry plane SF. By positioning them in this way, the earphone 1 can be further adapted for use in both the left and right ears, and the fit of the earphone 1 can be effectively improved.

[0113] Preferably, Figure 21 is a schematic cross-sectional view of the sound generation unit 100 with the symmetry plane SF as the cross-section. As shown in Figure 21, the minimum distance D10 between the sound emission hole 111 and the depressurization hole 112 is 6.5 to 10 mm. Preferably, the minimum distance D10 is 7 mm or more. Figure 21 shows the case where the symmetry plane SF is the cross-section. Acoustic short circuit refers to a condition where sound waves generated when the diaphragm 22 of the speaker 21 moves forward or backward are in opposite phase, causing these sound waves to cancel each other out, resulting in a lighter or unnatural-sounding voice. If the distance D10 is too short, it may cause an acoustic short circuit. By rationally setting the distance D10 between the sound emission hole 111 and the depressurization hole 112, the possibility of an acoustic short circuit can be effectively reduced, which is advantageous for improving the sound quality of the earphone 1.

[0114] Preferably, as shown in Figures 1 and 17, the decompression hole 112 is positioned toward the helix, and the sound emission hole 111 and the decompression hole 112 are spaced apart from each other by the contact area between the first housing 10 and the ear portion EAR. This contact area may also be the contact area between the first housing 10 and the antihelix or concha. By spacing the sound emission hole 111 and the decompression hole 112 apart by the contact area between the first housing 10 and the contact area, interference between the sound emission hole 111 and the decompression hole 112 can be effectively reduced, thereby effectively improving the reliability of the operation of the earphone 1, which is advantageous for improving the sound quality of the earphone 1, and it is applicable to both the left and right ears of the user, offering high compatibility.

[0115] Preferably, as shown in Figures 9 and 21, the sound vent 111 is single, band-shaped, and the plane of symmetry is positioned along the length of the sound vent 111 and perpendicular to the axial direction (i.e., the direction of axis Z). With this configuration, when the earphone 1 is worn by a user, the first housing 10 and the concha of the user's ear (EAR) do not make complete contact. Instead, there is a space that gradually increases from the contact area between the first housing 10 and the ear (EAR) toward the ear canal opening. As a result, the sound output from the sound vent 111 is reflected and amplified within the concha, and the reflection effect increases the sound pressure at the ear canal opening, allowing the user to hear sounds of greater intensity.

[0116] Preferably, as shown in Figures 15 and 21, there is one depressurization hole 112, it is strip-shaped, and the plane of symmetry SF is positioned along the width direction of the depressurization hole 112 and perpendicular to the axial direction (i.e., the direction of axis Z). By positioning it in this way, the depressurization hole 112 and the sound emission hole 111 are as far apart as possible, effectively reducing the possibility of acoustic short circuits, which is advantageous for improving the sound quality of the earphone 1.

[0117] Preferably, as shown in Figure 22, the decompression hole 112 includes a first hole 1121 and a second hole 1122 along the longitudinal direction of the decompression hole 112, and a third hole 1123 connected between the first hole 1121 and the second hole 1122, wherein the width W1 of at least a portion of the first hole 1121 and the width of at least a portion of the second hole 1122 are greater than the width W3 of the third hole 1123. The widths of the first hole 1121, the second hole 1122, and the third hole 1123 are dimensions in the width direction perpendicular to the longitudinal direction of the decompression hole 112. By installing it in this way, the area of ​​the decompression hole 112 can be increased, and the possibility of the decompression hole 112 being obstructed by the helix or other positions of the ear part EAR can be effectively reduced, which is advantageous for improving the decompression effect and further advantageous for improving the sound quality of the earphone 1. Furthermore, by installing it in this manner, the pressure reduction effect is maintained, and it is not necessary to set the entire pressure reduction hole 112 to its maximum width. As a result, the dimensions are appropriate, and it becomes easier to improve the aesthetics of the earphone 1.

[0118] Preferably, the plane of symmetry SF is the plane of symmetry of the ear hook 300. Specifically, the plane of symmetry of the ear hook 300 is positioned along the length of the ear hook 300 so that the difference between the parts on either side of the plane of symmetry of the ear hook 300 is minimized or the parts on either side coincide. That is, if the ear hook 300 is regularly symmetrical, the parts on either side of the plane of symmetry of the ear hook 300 coincide, and if the ear hook 300 is not strictly symmetrical, the difference between the parts on either side of the plane of symmetry SF of the ear hook 300 should be minimized among various division methods. For example, the magnitude of the difference can be distinguished by observing the projection of the ear hook 300 from a plane perpendicular to the plane of symmetry.

[0119] Preferably, as shown in Figures 19, 20 and 23, the first housing 10 may further include a first flexible body 13. The first housing cavity 110 is surrounded by the first rigid housing 11 and the second rigid housing 12, and the first flexible body 13 is installed on the outer wall of the second rigid housing 12 and used to contact the concha cavity. The plane on which the outermost annular line of the end face of the first flexible body 13 is located is the first reference plane S13, and the midpoint along the axis Z of the sound generation assembly 20 or the axis Z of the sound generation assembly 20 is located on the side of the first reference plane S13 toward the first rigid housing 11 and is parallel to the first reference plane S13.

[0120] As the rigid material, plastic, metal, or other support material usable as the housing of the earphone 1 may be used, thereby providing better support and stability to the internal structure of the first housing 10, for example, the sound generation assembly 20. The first flexible body 13 covers the outer wall of the second rigid housing 12, and in order to improve comfort when in contact with the wearer's sound generation part 100, the first flexible body 13 may be made of silicone rubber or other skin-friendly flexible material. Normally, when worn, the second rigid housing 12 faces the wearer's concha and makes contact with the wearer, and the wearing comfort of the earphone 1 is improved by ensuring that the first flexible body 13 covers the outer wall of the second rigid housing 12. Furthermore, by aligning the midpoint of the sound generation assembly 20 along its axis Z, or by aligning the axis Z of the sound generation assembly 20 with the first rigid housing 11 on the first reference plane S13, the center of the entire sound generation assembly 20 can be brought closer to the first rigid housing 11. That is, when the first flexible body 13 is installed on the outer wall of the second rigid housing 12, the centroid of the first housing 10 and the centroid of the sound generation assembly 20 do not coincide, and the centroid of the sound generation assembly 20 is deflected towards the first rigid housing 11 more than the centroid of the first housing 10. This enables eccentric installation of the sound generation assembly 20, allowing for greater use of the internal space of the first rigid housing 11 and improving space utilization efficiency.

[0121] Preferably, the midpoint of the sound generation assembly 20 along axis Z, or the distance D13 from axis Z to the first reference plane S13, is 0.4 to 4 mm. By positioning the sound generation assembly 20 in the first housing 10 in this way, a larger volume of the sound generation assembly 20 can be biased and distributed in the first rigid housing 11, thereby making full use of the relatively spacious internal space of the first rigid housing 11, and allowing the first housing 10 to accommodate a larger volume sound generation unit.

[0122] Preferably, the sound generating unit 100 is positioned within the concha cavity to keep at least a portion of the ear canal open, reducing the possibility of blocking the ear canal and thus affecting the transmission of sound into the user's ear canal, which is advantageous for sound reflection in the user's concha cavity and increases the listening volume.

[0123] In some embodiments, preferably, as shown in Figure 11, the ratio of the maximum axial dimension Z21 to the maximum radial dimension R20 of the sound generation assembly 20 is 0.8 to 1.3. Preferably, this ratio may be 0.9, 1, 1.1, 1.2, etc. In this way, the maximum axial dimension Z21 and the maximum radial dimension R20 of the sound generation assembly 20 are very close, the outer contour of the sound generation assembly 20 becomes closer to a sphere, effectively improving the compactness and integration of the structure of the sound generation assembly 20, effectively reducing the difficulty of assembly, and effectively improving assembly efficiency.

[0124] Preferably, the maximum radial dimension R20 of the sound generation assembly 20 is set to be the maximum radial dimension of the mounting bracket 27 or frame 25, so that the mounting bracket 27 or frame 25 functions as the main force-bearing member during assembly, effectively protecting the diaphragm 22 and voice coil 23 and effectively improving the reliability and effectiveness of the operation of the sound generation assembly 20. Preferably, the maximum axial dimension of the sound generation assembly 20 is set to be the maximum axial dimension along the axial direction between the magnetic permeable covers 241 of the two speakers 21 (i.e., the direction of axis Z).

[0125] Preferably, in some embodiments, the resonant peak frequencies of the diaphragms 22 of the two speakers 21 are 200 to 300 Hz, and the absolute difference between the resonant peak frequencies of the diaphragms 22 of the two speakers 21 is 50 Hz or less. The resonant peak may be the first resonant peak that appears in the frequency sweep process from low to high frequencies. Specifically, the resonant peak frequency is the frequency of the first resonant peak that appears in order from low to high frequencies when an electroacoustic sweep test is performed on the structure within the sound generation unit 100, consisting of the speaker 21, the first housing 10, and the internal cavity of the first housing 10, and the position where the resonant peak appears corresponds to the position where the impedance curve of the sound generation unit 100 increases sharply.

[0126] By setting the resonant peak frequency of speaker 21 within a reasonable range, the variety and range of sounds that speaker 21 can reproduce are widened, resulting in superior sound quality not only for human voices but also for music playback. Furthermore, by ensuring that the absolute difference between the resonant peak frequencies of the two speakers 21 is 50Hz or less, the consistency between the two speakers 21 is high, further improving the sound quality of earphone 1.

[0127] In some embodiments, as shown in Figure 21, the sound vent 111 is strip-shaped and has a first end 111a and a second end 111b spaced apart along the length of the sound vent 111. When worn, the first end 111a is positioned toward the ear canal, and the distance D10 between the outer wall surface of the first housing 10 at the second end 111b and the inner wall surface of the concha cavity E12 is smaller than the distance D10 between the outer wall surface of the first housing 10 at the first end 111a and the inner wall surface of the concha cavity E12.

[0128] The sound vent 111 is installed in the first housing 10, and by positioning the first end 111a of the sound vent 111 toward the ear canal, the orientation of the first housing 10 is changed, allowing as many sound waves as possible to enter the ear canal through the sound vent 111, effectively shortening the sound wave transmission path, effectively improving the volume effect of the sound heard by the user, and is advantageous for improving the sound quality of the earphone 1. Furthermore, by making the distance D10 between the outer wall surface of the first housing 10 at the second end 111b and the inner wall surface of the conchaecular cavity E12 smaller than the distance D10 between the outer wall surface of the first housing 10 at the first end 111a and the inner wall surface of the conchaecular cavity E12, the outer edge of the speaker 21 can form a roughly wedge-shaped space with the curve formed by cutting the first housing 10 and the conchaecular cavity. When the sound outlet 111 is installed along the curve, a horn structure can be formed between the sound outlet 111 and the conchaecular cavity, and the conchaecular cavity E12 can be used as a reflective wall surface to enhance sound wave reflection, thereby effectively improving the sound pressure in the ear canal and effectively increasing the listening volume.

[0129] Preferably, as shown in Figure 21, the outer wall surface of the first housing 10 and the inner wall surface of the concha cavity are in contact with each other on the side of the second end 111b and / or the side of the second end 111b away from the first end 111a. This configuration is advantageous because it blocks sound from being transmitted away from the ear canal, and the first housing 10 and the concha cavity form a horn structure that reflects sound into the ear canal, which is advantageous in reducing sound leakage from the earphone 1, effectively improving sound pressure in the ear canal, and effectively increasing the listening volume.

[0130] Preferably, as shown in Figure 21, the outer wall surface of the first housing 10 is configured such that the long side edge 111c of the sound-emitting hole 111 is arc-shaped, and the distance D10 between the outer wall surface of the first housing 10 and the inner wall surface of the concha cavity gradually increases from the second end 111b to the first end 111a. By configuring it in this way, sound can be reflected back into the ear canal within the horn structure formed between the concha cavity E12 and the outer wall surface of the first housing 10 without being reflected away from the ear canal, effectively improving the sound emission effect of the earphone 1, effectively increasing the sound pressure in the ear canal, and effectively raising the listening volume.

[0131] Preferably, as shown in Figure 21, the arc-to-chord ratio of the long-side edge 111c of the sound hole 111 is 1.05 to 1.4, and may be, for example, 1.1, 1.2, 1.3, etc. A plane of symmetry is set along the length direction of the ear hook 300, and the arc-to-chord ratio of the long-side edge 111c of the sound hole 111 is the arc-to-chord ratio of the contour of the projection of the long-side edge 111c onto the plane of symmetry. In some embodiments, the long-side edge 111c of the sound hole 111 has an arc length of 10 mm and a chord length of 8.87 mm. Preferably, the aspect ratio of the sound hole 111 is 0.15 to 0.30, and may be, for example, 0.18, 0.20, 0.25, etc. Preferably, the length of the sound-emitting hole 111 may be 9 mm to 16.5 mm, for example, 10 mm, 12 mm, 13 mm, 14 mm, 16 mm, etc. In some embodiments, the sound-emitting hole 111 has an inner width of 1.95 mm, an outer width of 2.58 mm, and a length of 12.9 mm. By rationally setting the arc length, chord length, width, and length of the long side edge 111c of the sound-emitting hole 111, the dimensions of the sound-emitting hole 111 are better suited to the dimensions and shape of the concha and ear canal, making it easier to form a horn structure that enhances sound, effectively improving the sound-emitting effect of the earphone 1, effectively increasing the sound pressure in the ear canal, and effectively raising the listening volume.

[0132] Preferably, as shown in Figure 24, when both the sound generating portion 100 and the contact portion 400 are positioned on a horizontal reference plane, the long side edge 111c of the sound emitting hole 111 forms a horizontal reference plane and a first reference point M between the first end 111a and the second end 111b, with the second end 111b located on the side of the first reference point M toward the contact portion 400 and the first end 111a located on the opposite side of the first reference point M from the contact portion 400. By installing it in this manner, the first end 111a of the sound vent 111 is closer to the ear canal, and the first housing 10 near the second end 111b abuts against the concha, allowing it to clamp both sides of the user's ear (EAR) together with the contact portion 400. Furthermore, it firmly clamps the ear (EAR) and increases the volume and sound pressure by utilizing the concha. The portion of the first housing 10 that abuts against the concha can further block the transmission of sound away from the ear canal, which is advantageous in reducing sound leakage.

[0133] Preferably, the length D12 between the first end 111a of the long side edge 111c of the sound vent 111 and the first reference point M is 2 to 5.5 mm, for example, 2.55 mm, 3.56 mm, 4 mm, 4.76 mm, etc., and the length D13 between the second end 111b of the long side edge 111c of the sound vent 111 and the first reference point M is 4.5 to 8 mm, for example, 5.53 mm, 6 mm, 6.73 mm, 7.81 mm, etc. All of the above lengths are the distances between corresponding positions of the contour of the projection of the sound vent 111 onto the plane of symmetry. By rationally setting the distances from the first end 111a and the second end 111b to the first reference point M, the effect of sound waves being transmitted and amplified in the concha cavity E12 to the ear canal is further improved, effectively increasing the sound pressure in the ear canal and effectively raising the listening volume.

[0134] Preferably, the arc-to-chord ratio of the long-side edge of the sound hole 111 between the first end 111a and the first reference point M is 1.02 to 1.05, and may be, for example, 1.03 or 1.04, and the arc-to-chord ratio of the long-side edge of the sound hole 111 between the second end 111b and the first reference point M is 1.02 to 1.05, and may be, for example, 1.03 or 1.04. The above arc-to-chord ratios are all the arc-to-chord ratios between corresponding positions of the contour of the projection of the sound hole 111 onto the plane of symmetry. By rationally setting the arc length-chord length ratio of the long-side side hole edge 111c of the sound-emitting hole 111 between the first end 111a and the second end 111b and the first reference point M, the device adapts to the shape of the user's concha cavity to ensure wearing comfort, and improves the sound reflection effect of the horn structure formed by the outer wall surface of the first housing 10 and the concha cavity, thereby effectively improving listening volume and user experience.

[0135] Preferably, as shown in Figure 24, the long side edge 111c of the sound vent hole 111 has a first normal direction F1 at the first reference point M, the long side edge 111c of the sound vent hole 111 has a second normal direction F2 at the first end 111a, and the long side edge 111c of the sound vent hole 111 has a third normal direction F3 at the second end 111b, the angle α1 between the first normal direction F1 and the second normal direction F2 is 30° to 42°, and the angle α2 between the first normal direction F1 and the third normal direction F3 is 50° to 60°. The angle α1 between the first normal direction F1 and the second normal direction F2 may be, for example, 32°, 35°, 37°, etc., and the angle α2 between the first normal direction F1 and the third normal direction F3 may be, for example, 53°, 55°, 57°, etc. The angles mentioned above are all angles between corresponding positions of the contour of the projection of the sound vent 111 onto the plane of symmetry. By rationally setting these angles, the size of the space of the sound vent 111 is secured, and the sound reflection effect of the horn structure formed between the outer wall surface of the first housing 10 and the concha cavity is improved, thereby effectively improving listening volume and user experience.

[0136] Preferably, as shown in Figure 9, the sound vent 111 has a bisector set along its length, the sound vent 111 is set to intersect a reference cross section SF set along the length of the ear hook 300, the angle between the plane where the bisector is located and the reference cross section SF is 0° to 45°, and the sound vent 111 is offset toward the earlobe. The bisector may be a virtual curve that evenly divides the sound vent 111 into two parts along its length. Preferably, the sound vent 111 is set to intersect a reference cross section SF set along the length of the ear hook 300, the angle between the plane where the bisector is located and the reference cross section SF is 15° to 45°, and may be, for example, 20°, 30°, etc. In some embodiments, the reference cross section SF may coincide with a plane of symmetry set along the length of the ear hook 300, so when describing the plane of symmetry below, it will be referred to as the plane of symmetry SF. Thus, the reference cross section SF is positioned along the length of the ear hook 300 so that the difference between the portions of the ear hook 300 on either side of the reference cross section SF is minimized or the portions on either side coincide. Naturally, in some other embodiments, the reference cross section SF and the plane of symmetry of the ear hook may be parallel to each other but offset by a small gap.

[0137] By rationally setting the angle between the bisector of the sound outlet 111 and the reference cross section SF of the ear hook 300, and positioning the sound outlet 111 to be offset toward the earlobe, user comfort is ensured, and as much sound output from the sound outlet 111 as possible is transmitted to the ear canal, effectively improving the user experience of the earphone 1. Specifically, when a user is wearing the earphone 1 naturally, the earphone 1 may be biased downward due to gravity as the user moves. By positioning it in this way, even if the earphone 1 is biased, the sound outlet 111 can face the ear canal as directly as possible, effectively increasing the user's listening volume when the earphone 1 is biased, and improving the user experience.

[0138] Preferably, the plane on which the bisector lies and the reference cross-section SF overlap with each other. Alternatively, the sound outlet 111 is mirror-symmetric with respect to the reference cross-section SF. By setting it up in this way, the earphone 1 can be adapted for wearing and using in both the left and right ears, ensuring user comfort and effectively improving the fit of the earphone 1.

[0139] Preferably, as shown in Figure 25, in the reference cross section SF, the sound generating unit 100 has a second reference point N that is closest to the contact portion 400. In some embodiments, in the natural state, the sound generating unit 100 and the contact portion 400 do not come into direct contact. In this case, the second reference point N is the intersection of the shortest connection line between the sound generating unit 100 and the contact portion 400 and the outer wall surface of the sound generating unit 100, with the midpoint of the shortest connection line being O. In some other embodiments, in the natural state, the sound generating unit 100 and the contact portion 400 are just in contact, or the contact area is very small. In this case, the point of contact between the sound generating unit 100 and the contact portion 400 is considered to be the second reference point N. In some other embodiments, the contact area between the sound generating unit 100 and the contact part 400 is large in its natural state, and in this case, the midpoint of the arc corresponding to the contact area between the outer wall surface of the sound generating unit 100 and the contact part 400 in the reference cross section SF is the second reference point N.

[0140] The region of the inner contour of the ear hook 300 that is close to the edge of the helix when worn has a third reference point C that is furthest from the second reference point N, and the sound vent 111 is located on the side of the second reference point N that is farther from the third reference point C, and on the outer wall surface of the sound generating part 100, the distance D13 from the second end 111b to the second reference point N is 2.2 to 4.2 mm, and the distance from the first end 111a to the second reference point N is 9 to 12.4 mm. The distance from the second end 111b to the second reference point N may be, for example, 2.3 mm, 2.6 mm, 2.9 mm, etc., and the distance from the first end 111a to the second reference point N may be 9.8 mm, 10.7 mm, 11.6 mm, etc., but other values ​​may also be used. All of the above distances are the distances between corresponding positions of the contour of the projection of the sound vent 111 onto the plane of symmetry.

[0141] Preferably, as shown in Figure 15, the decompression hole 112 is positioned toward the helix and intersects the reference cross section SF. By positioning it in this way, the decompression effect of the decompression hole 112 is ensured, the possibility of interference between the decompression hole 112 and the sound emission hole 111 is effectively reduced, and the stability and reliability of the operation of the earphone 1 can be effectively improved.

[0142] Preferably, as shown in Figures 1 and 21, the decompression hole 112 and the sound emission hole 111 are spaced apart from each other by the contact area between the sound generating unit 100 and the ear (e.g., the concha). By spacing the sound emission hole 111 and the decompression hole 112 apart by the contact area between the sound generating unit 100 and the ear, the possibility of acoustic short circuits occurring between the sound emission hole 111 and the decompression hole 112 can be effectively reduced, thereby effectively improving the reliability of the operation of the earphone 1, which is advantageous for improving the sound quality of the earphone 1, and it can be applied to both the left and right ears of the user, making it highly compatible.

[0143] Preferably, as shown in Figure 15, there is one depressurization hole 112, which is strip-shaped, and the reference cross section SF is installed along the width direction of the depressurization hole 112. By installing it in this way, the area of ​​the depressurization hole is secured, effectively ensuring the depressurization effect of the depressurization hole 112, and preventing the depressurization hole 112 from extending excessively in the direction of the ear hook 300, which is advantageous in improving the aesthetics of the earphone 1.

[0144] Preferably, as shown in Figure 15, the pressure relief hole 112 is mirror-symmetric with respect to the reference cross-section SF, improving the aesthetics of the earphone 1 and allowing the earphone 1 to be adapted for wearing in the left and right ears, thereby effectively improving the fit of the earphone 1.

[0145] Preferably, as shown in Figures 15 to 17, the sound generation assembly 20 is provided with at least one second sound guide hole 204 that communicates with a depressurization hole 112 via a first housing cavity, and the distance between the at least one second sound guide hole 204 and the depressurization hole 112 is 0.5 mm or less. Preferably, the distance is 0.4 mm or less, and preferably, 0.3 mm or less. If the distance from the sound guide hole to the depressurization hole 112 is too large, the depressurization performance will decrease, thereby affecting the sound quality of the earphone 1. By rationally setting the distance from the sound guide hole to the depressurization hole 112, the depressurization efficiency can be effectively improved, which is advantageous for improving the sound quality of the earphone 1.

[0146] Preferably, as shown in Figures 4, 19 to 21, the earphone 1 further includes a microphone 30, and the first housing 10 is provided with an inlet 101 that guides external sound to the microphone 30, and the inlet 101 is positioned to intersect the reference cross section SF. The microphone 30 can collect sound, thereby allowing the earphone 1 to be adapted to different usage scenarios such as music playback and phone calls. By positioning the inlet 101 to intersect the reference cross section SF, the effectiveness of the microphone 30 in collecting sound through the inlet 101 is ensured, and the earphone 1 can be adapted for use in both the left and right ear, effectively improving the suitability of the earphone 1. The cross section corresponding to the cutting line V to V in Figure 4 is the reference cross section SF.

[0147] Preferably, the ear hook 300 has a clamping force F such that the sound generating part 100 and the contact part 400 are clamped on both sides of the auricle when worn, by providing an elastic force between them. As shown in Figure 26, the ear hook 300 is installed so that the sound generating part 100 and the contact part 400 come into contact with each other in a natural state, forming a clamping force F0.

[0148] When worn, the ear hook 300 elastically deforms to some extent, applying a certain elastic force to both sides of the user's earlobe. Under the action of this elastic force, the sound generating part 100 and the contact part 400 contact both sides of the auricle, respectively, and clamp the ear. However, if the elastic force provided by the ear hook 300 is too large, the clamping force F becomes too large, causing discomfort to the ear. If it is too small, the clamping force F becomes too small, making it difficult to wear the device stably.

[0149] As Hooke's Law shows, the elastic force due to elastic deformation is directly proportional to the amount of deformation of the object, and the ratio is the elastic modulus. To meet the need to clamp thin ear sections, the elastic modulus of the ear hook 300 is usually set to be large. However, this results in excessive elastic force being applied when the thickness of the ear section being clamped is large, causing pain and poor wearing comfort. Furthermore, because the elastic modulus is large, the clamping force F changes significantly when fitting ear sections of different thicknesses, and the difference in clamping force F is large, leading to significant differences in user experience and low compatibility. As shown in Figure 27, in the case of the clamping force change line L1, there is no tightening force and the elastic modulus is large, so the distance between the sound generating part 100 and the contact part 400 is X s From X m During the change, the clamping force F is large, and the amount of change in clamping force ΔF1 is large. Based on this, by positioning the ear hook 300 so that the sound generating part 100 and the contact part 400 come into contact with each other in a natural state and form a clamping force, the elastic modulus of the ear hook 300 can be reduced. When clamping a small ear portion and a large ear portion, the change in the elastic force applied by the ear hook 300 is small, effectively reducing the difference in clamping force F between the small ear portion and the large ear portion, effectively improving the fit and wearing comfort of the earphone 1, and allowing the earphone 1 to be worn by users with a wider range of ear portion sizes. As shown in Figure 27, in the case of clamping force change line L2 compared to clamping force change line L1, there is a clamping force F0, and the distance between the sound generating part 100 and the contact part 400 is X s From X mDuring the change, the clamping force F is small, and the amount of change in clamping force ΔF2 is also small, thereby effectively achieving the above technical effects. For example, the difference in clamping force F between ears with small thickness and ears with large thickness is reduced, effectively improving the fit and wearing comfort of the earphone 1, and allowing the earphone 1 to be worn by users with a wider range of ear sizes.

[0150] The applicant conducted numerous empirical studies to improve the wearing comfort of earphone 1, and as a result, found that the ear thickness X of a person with small ears s It is approximately 3.8 mm, and the thickness of the ear in people with large ears is X m The length is approximately 5.5 mm. After obtaining this data, the applicant conducted a study on earphone 1 in terms of tightening force, elastic modulus, and other relevant factors.

[0151] Preferably, the elastic modulus of the ear hook 300 is set such that the change in elastic force is 20 grams or less, for example, 5 grams, 10 grams, and 15 grams, as the minimum distance between the sound generating part 100 and the contact part 400 increases from 3.8 mm to 5.5 mm. As shown in Figure 27, given a tightening force F0, the distance between the sound generating part 100 and the contact part 400 is X m In this case, the clamping force F is small, and the change in clamping force ΔF2 is also small.

[0152] By rationally setting the elastic modulus, when the elastic force satisfies the clamping needs, the change in the elastic force is small, and when the earphone 1 is clamped between the thicker and thinner ear parts, the difference in clamping force provided by the ear hook 300 is small, satisfying wearing comfort and effectively improving the fit of the earphone 1.

[0153] Preferably, the elastic modulus and tightening force of the ear hook 300 are set such that the elastic force is between 25 grams-force and 65 grams-force, for example, 30 grams-force, 40 grams-force, 50 grams-force, etc., as the minimum distance between the sound generating part 100 and the contact part 400 increases from 3.8 mm to 5.5 mm.

[0154] By rationally setting the elastic modulus and clamping force of the ear loop 300 to provide an appropriate elastic force, the mask provides the user with an appropriate clamping force F when worn, ensuring wearing stability and improving wearing comfort.

[0155] As shown in Figure 28, the clamping force F0 can be measured by a thin-film pressure sensor 600, specifically by sandwiching the thin-film pressure sensor 600 between the contact portion 400 and the sound generating portion 100 to measure the clamping force F0. In some other embodiments, as shown in Figures 29 and 30, the clamping force F0 may also be measured by tension meters / sensors 607, 613, for example, by fixing one of the sound generating portion 100 and the contact portion 400 and pulling the other of the sound generating portion 100 and the contact portion 400 until they are just touching / separated or the minimum distance between them is small, and the tension measured at this time is the clamping force. The small distance is, for example, 0 to 0.8 mm.

[0156] As shown in Figures 29 and 30, the clamping force F can be measured when the sound generating unit 100 and the contact unit 400 are installed horizontally. Specifically, the contact unit 400 is fixed with a tension meter / sensor, and the sound generating unit 100 is pulled to measure the clamping force. For example, after attaching a wire to the housing of the sound generating unit 100, the wire is pulled to displace it by, for example, 3.8 mm to 5.5 mm, and then the measurement is taken.

[0157] As shown in Figure 29, the auxiliary plate 603 and angle bracket 601 are fixed in the X direction (without relative displacement in the X direction) using an adhesive (e.g., quick-drying adhesive, hot-melt adhesive, etc.) or another fixing method that does not damage the structure of the earphone 1, and the auxiliary plate 604 and angle bracket 602 are fixed in the X direction (without displacement in the X direction), and the auxiliary plates 603 and 604 are placed on a support base surface with a low coefficient of friction in the X direction (e.g., a lubricating oil interface or a support base surface on a bearing support). The angle bracket 601 is in contact with both ends of the earphone 1 that are close to the ear hook 300, on the inside in the Y direction, and the angle bracket 602 is in contact with both ends on the inside in the Y direction, thereby fixing the earphone 1 between the angle bracket 601 and the angle bracket 602. The force gauge 607 is connected to the angle bracket 602 in the X direction, and the force gauge 607 and angle bracket 602 are fixed together, for example, by a screw 606. In some embodiments, the connection position between the earphone 1 and the two angle brackets 601 and 602 is close to the horizontal direction by further fixing the earphone 1 with an adhesive (e.g., quick-drying adhesive, hot-melt adhesive, etc.) or another fixing method that does not damage the structure of the earphone 1. For example, as shown in Figure 29, one side of the sound generating unit 100 and the angle bracket 601 are fixedly connected at position A, and one side of the contact part 400 and the angle bracket 602 are fixedly connected at position B, and the connection line between position A and position B is approximately parallel to the X direction. During measurement, the auxiliary plate 604 is fixed and the auxiliary plate 603 is moved by tension in the X direction, so that the sound generating unit 100 and the contact part 400 are separated, the magnitude of the tension is obtained by force gauge 607, and the distance between the auxiliary plate 603 and the auxiliary plate 604, i.e. the separation distance between the sound generating unit 100 and the contact part 400 is obtained by caliper.

[0158] As shown in Figure 30, the contact portion 400 is fixed between two clamping plates by a fixing member 608, one end of the force measuring wire 612 is connected to the housing of the sound generating unit 100 on the side away from the contact portion 400 using an adhesive (e.g., quick-drying adhesive, hot-melt adhesive, etc.) (for example, the force measuring wire 612 is connected to the sound generating unit 100 at position C, and the plane of symmetry SF of the ear hook 300 can pass through position C), and the other end of the force measuring wire 612 is connected to a force gauge 613. The force measuring wire 612 is parallel to the X direction. During measurement, the force gauge 613 is moved by tension in the X direction, which pulls and moves the sound generating unit 100, separating the sound generating unit 100 from the contact portion 400, the separation distance between the sound generating unit 100 and the contact portion 400 is obtained using a caliper 609, and the magnitude of the tension is obtained using the force gauge 613.

[0159] Preferably, the clamping force is set to a force of 1 gram-force to 25 grams-force, and the elastic modulus of the ear hook 300 is set such that when the minimum spacing is 3.85 mm, the elastic force is between 25 grams-force and 48 grams-force, and when the minimum spacing is 5.5 mm, the elastic force is between 26 grams-force and 65 grams-force. Preferably, the ear hook 300 may have a width of 3 to 10 mm and a thickness of 0.5 to 5 mm. By rationally setting the width and thickness parameters of the ear hook 300, the elastic force changes basically linearly in the usage scenario, effectively improving wearing comfort when clamping stability is satisfied, and effectively improving the fit, wearing stability and reliability of the earphone 1.

[0160] Preferably, as shown in Figure 31, the earphone 1 may further include a magnetic coupling matching structure 50, which provides a magnetic coupling force between the sound generating part 100 and the contact part 400. The magnetic coupling force and the elastic force combine to form a clamping force F. The tendency of the magnetic coupling force to change with respect to the minimum distance between the sound generating part 100 and the contact part 400 is inverse to the tendency of the elastic force to change with respect to the minimum gap. For example, if the minimum distance between the sound generating part 100 and the contact part 400 gradually increases, the elastic force gradually increases and the magnetic coupling force gradually decreases. The magnetic coupling force provided by the magnetic coupling matching structure 50 may be used when the ear hook 300 is in a natural state and the sound generating part 100 and the contact part 400 are in contact with each other, or it may be used when the ear hook 300 is installed so that the sound generating part 100 and the contact part 400 are separated from each other in a natural state.

[0161] By installing the magnetic coupling alignment structure 50 and providing a magnetic coupling force, the magnetic coupling force and elastic force combine to provide an appropriate clamping force F when worn. This effectively reduces the change and fluctuation of the clamping force F when the minimum distance changes, effectively improving wearing comfort, reducing the tightening force that the ear loops 300 should provide, and making the user's wearing process smoother.

[0162] Preferably, as shown in Figure 31, the magnetic coupling matching structure 50 includes a first magnetic coupling matching member 51 installed in the sound generation unit 100 and a second magnetic coupling matching member 52 installed in the contact unit 400, wherein the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52 are magnetically attracted to each other. The first magnetic coupling matching member 51 and the second magnetic coupling matching member 52 may be magnets, and the first magnetic coupling matching member in the sound generation unit 100 may be the magnetic material 242 of the speaker 21, or it may be an additionally installed magnet or other magnetic member. By installing the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52 in the sound generation unit 100 and the contact unit 400, respectively, and by providing a magnetic coupling force using the magnetic attraction between the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52, a clamping force that is small in fluctuation and of an appropriate magnitude is maintained when clamping an ear portion EAR with a large thickness or an ear portion EAR with a small thickness, effectively improving wearing comfort. Preferably, the magnets may be arranged in a Halbach array, thereby increasing the magnetic force provided and contributing to improved wearing stability. Preferably, the magnets are placed within the first flexible body 13, thereby avoiding interference with other assemblies and improving the structural integrity and compactness of the earphone 1.

[0163] When installed, the attractive force between the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52 can compensate for the clamping force F between the sound generating unit 100 and the contact unit 400. As shown in Figure 31, the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52 attract each other, creating an attractive force F. A This generates a pinching force F that the ear hook 300 provides to the sound generating unit 100 and the contact unit 400, thereby compensating for the pinching force F. In other words, when worn, the pinching force F is equal to the suction force F. A And the elastic force F due to the elastic deformation of the ear loop 300. k This includes. In some embodiments, equation (1) can express the relationship between the distance between the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52 and the attractive force.

[0164]

number

[0165] In the formula, K is a constant, m1 may represent the magnetic moment of the first magnetic coupling matching member 51, m2 may represent the magnetic moment of the second magnetic coupling matching member 52, d may represent the distance between the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52, X0 may represent the distance between the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52 in the non-attached state, and X may represent the distance between the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52 that increases due to the movement of the sound generating unit 100 and the contact unit 400 in the attached state.

[0166] As can be seen from equation (1), the greater the increase in distance X between the sound generating unit 100 and the contact unit 400, the greater the distance d between the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52, and the greater the attractive force F between the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52. A It becomes smaller.

[0167] In some embodiments, a force gauge and mats of different thicknesses (e.g., silicone rubber mat, cardboard, rubber mat, etc.) may be used to measure different attractive forces corresponding to different distances between the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52. For example, the ear hook 300 of the earphone 1 may be cut, and either the sound generating part 100 or the contact part 400 may be fixed, with the other of the sound generating part 100 or the contact part 400 connected to a force gauge. Figures 29 and 30 can be generally used to refer to the sound generating part 100, the contact part 400, and the force gauge. By placing mats of different thicknesses between the sound generating part 100 and the contact part 400, the distance between the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52 is controlled, and the force gauge is used to measure the attractive force between the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52 when mats of different thicknesses are placed. In some embodiments, the attractive force may be measured by a thin-film pressure sensor. Specifically, after cutting the ear hook 300, a thin-film pressure sensor and mats of different thicknesses are placed between the sound generating unit 100 and the contact unit 400. The thin-film pressure sensor is then pressed by the attractive force between the first magnetic coupling matching member 51 in the sound generating unit 100 and the second magnetic coupling matching member 52 in the contact unit 400, thereby measuring the attractive force corresponding to different distances between the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52.

[0168] In some embodiments, when not being worn, the ear hook 300 may provide a tightening force F0 to bring the sound generating part 100 and the contact part 400 into contact with each other. A detailed explanation of the tightening force can be found in the related explanations above and is omitted here.

[0169] In some embodiments, when not attached, the sound generating unit 100 and the contact unit 400 do not come into contact. When not attached, the sound generating unit 100 and the contact unit 400 do not come into contact; that is, there is no clamping force between the sound generating unit 100 and the contact unit 400 that would cause them to come into contact with each other.

[0170] In some embodiments, when worn, the clamping force F between the sound generating part 100 and the contact part 400 is the elastic force F due to the elastic deformation of the ear hook 300. k And the attractive force F between the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52 A This includes the following. In some embodiments, the clamping force F may further include a tightening force F0 provided by the ear hook 300 to bring the sound generating part 100 and the contact part 400 into contact.

[0171] As can be seen from the above, in order to ensure the stability of the earphone 1 when it is attached to the wearer's ear, the clamping force F (i.e., the sum of the elastic force and the suction force, or the sum of the elastic force, the suction force and the tightening force) must be greater than the lower limit of the clamping force corresponding to the minimum auricle thickness. And only by ensuring that the clamping force is less than the upper limit of the clamping force corresponding to the maximum auricle thickness can the ear cuff type earphone avoid causing discomfort to users with thicker auricles. In some embodiments, when the distance between the housing of the sound generating unit 100 and the contact part 400 is 3.5 mm to 5.6 mm or 3.8 mm to 5.5 mm, the clamping force F (i.e., the sum of the elastic force and the suction force, or the sum of the elastic force, the suction force and the tightening force) may be 0.20 N to 0.70 N. For example, based on a lower limit of 0.20 N for the clamping force corresponding to the minimum auricle thickness and an upper limit of 0.70 N for the clamping force corresponding to the maximum auricle thickness, the clamping force provided by the ear hook 300 (i.e., the sum of the elastic force and the suction force, or the sum of the elastic force, the suction force and the tightening force) can be determined to be between 0.20 N and 0.70 N. In some embodiments, when the distance between the housing of the sound generating unit 100 and the contact portion 400 is between 3.8 mm and 5.5 mm, the clamping force F (i.e., the sum of the elastic force and the suction force, or the sum of the elastic force, the suction force and the tightening force) may be between 0.25 N and 0.65 N. Furthermore, for example, based on a lower limit of 0.25N for the clamping force corresponding to the minimum auricle thickness and an upper limit of 0.65N for the clamping force corresponding to the maximum auricle thickness, it can be determined that the clamping force provided by the ear hook 300 (i.e., the sum of the elastic force and the suction force, or the sum of the elastic force, the suction force and the tightening force) is between 0.25N and 0.65N.

[0172] As can be seen from the above, the greater the distance X between the sound generating part 100 and the contact part 400, the greater the elastic force F provided by the ear hook 300. k As this increases, the attractive force F between the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52 increases. A As this becomes smaller, the difference between the clamping force F experienced by a user with small ears and the clamping force F experienced by a user with large ears can be further reduced based on the attractive force between the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52. For example, if the clamping force F is limited to 0.3N to 0.5N, the difference between the clamping force experienced by a user with small ears and the clamping force experienced by a user with large ears is reduced to 0.20N. In some embodiments, when the distance between the housing of the sound generating unit 100 and the contact part 400 is 3.8mm to 5.5mm, the change in clamping force F is 0.20N or less. This ensures that the difference between the clamping force experienced by a user with small ears and the clamping force experienced by a user with large ears is small, as shown in Figure 27, by setting the minimum auricle thickness X s , set lower limit of clamping force F1, maximum auricle thickness X m If the distance between the sound generating unit 100 and the contact unit 400 is limited to a range of 3.8 mm to 5.5 mm based on the set upper limit of the clamping force F3, then the change in clamping force (i.e., the difference between F3 and F1) is, for example, 0.20 N or less.

[0173] In some embodiments, when the distance between the sound generating unit 100 and the contact unit 400 is 3.8 mm to 5.5 mm, the change in the attractive force between the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52 may be 0.05 N to 0.10 N.

[0174] As shown in Figure 32, the clamping force F is equal to the elastic force F k and suction power F A The initial distance between the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52 is X0. Elastic force F kkX is equal to kX, where k is the elastic modulus and X is the distance between the sound generating part 100 and the contact part 400. Suction force F A This can be calculated based on the above-mentioned formula (1). When the distance between the sound generating part 100 and the contact part 400 is X1 to X2, the elastic force F k is, F sk ~F mk Therefore, the suction force F A is, F ma ~F sa Therefore, the clamping force F is F s ~F m And F s =F ma +F sk F m =F mk +F sa For example, if the distance between the sound generating part 100 and the contact part 400 is 3.8 mm to 5.5 mm, the corresponding elastic force is 0.27 N to 0.35 N, and in order to ensure that the clamping force is 0.3 N to 0.4 N, the compensating attractive force is 0.03 (0.3 - 0.27 = 0.03) N to 0.05 (0.4 - 0.35 = 0.05) N. As can be seen from Figure 33, by appropriately setting the magnetic coupling parameters (K, m1, m2, X0), etc., and the elastic modulus k, etc., F can be set in the range of X1 to X2. k Increase and F A The decrease in force is almost entirely offset, or nearly entirely offset, and the total clamping force F is basically stably maintained within the range of X1 to X2, thereby ensuring that the user experience provided by earphone 1 is consistent for users with different auricle thicknesses. The range of X1 to X2 includes, for example, 3.8 mm to 5.5 mm.

[0175] In some embodiments, the ear loop 300 further provides a tightening force F0, and the tightening force F0 and suction force F A By adjusting the size, the total clamping force F can be kept within an appropriate range. As shown in Figure 33, the ear loop 300 has an elastic force F k , clamping force F0 and suction force F AThis can be provided simultaneously, and in this case, the clamping force F for users with large ears by the ear hook 300 exceeds the upper limit of the clamping force. By reducing the clamping force F0 from F01 to F02, the clamping force F is reduced to the minimum auricle thickness X s ~Maximum ear thickness X m The curve corresponding to the clamping force F is gentle and within an appropriate clamping force range, indicating that the combination of clamping force and suction force can improve the stability and comfort of wearing ear cuff-type earphones and reduce the difference in clamping force between users with large ears and users with small ears.

[0176] Preferably, the elastic force and magnetic coupling force are set such that the clamping force is between 25 grams-force and 65 grams-force, for example, 30 grams-force, 40 grams-force, 50 grams-force, 60 grams-force, etc., as the minimum distance between the sound generating part 100 and the contact part 400 increases from 3.85 mm to 5.5 mm. Note that 1 gram-force refers to the gravitational force acting on an object weighing 1 gram.

[0177] By rationally setting the elastic and magnetic coupling forces, the device provides a consistent clamping force for users with different ear sizes while worn, ensuring wearing stability and improving wearing comfort.

[0178] Preferably, the magnetic coupling force is set such that the change in magnetic coupling force is 20 grams or more as the minimum distance between the sound generating part 100 and the contact part 400 increases from 3.8 mm to 5.5 mm. By setting it in this way, the change in magnetic coupling force is relatively large and the change in elastic force is relatively small, which allows the elastic modulus of the ear hook 300 to be relatively small, which is advantageous in improving the stability and reliability of wearing the earphone 1.

[0179] Preferably, as shown in Figure 34, the ear hook 300 includes an elastic sheet 301, and both ends of the elastic sheet 301 along its length are fixed to the sound generating part 100 and the contact part 400, respectively. The ratio of the width W31 to the thickness K31 of the elastic sheet 301 is 8 to 12, and may be, for example, 9, 10, 11, etc. In some embodiments, the width W31 of the elastic sheet 301 is 1 to 3 mm, for example, 2 mm, and the thickness K31 is 0.1 to 0.3 mm, for example, 0.15 mm, 0.2 mm, 0.25 mm, etc.

[0180] By installing the elastic sheet 301 and providing an elastic force, the earphone 1 is secured in place. By rationally setting the width-to-thickness ratio, the ear hook 300 is ensured to have sufficient strength while meeting the need for elastic force, resulting in the earphone 1 offering both comfort and stability. Furthermore, by rationally setting the width and thickness of the elastic sheet 301, the torque it receives is reduced, preventing twisting, and the change in the provided elastic force becomes more linear, effectively improving comfort. The elastic sheet 301 may be, for example, a titanium sheet, and to improve comfort, its exterior may be coated with a flexible material such as silicone rubber, rubber, elastic resin, polyurethane, polydimethylsiloxane, PVC, or TPE.

[0181] Preferably, the earphone 1 further includes a flexible printed circuit board (FPC), which is arranged along the length of the elastic sheet 301 and installed on the elastic sheet 301, thereby effectively reducing the difficulty of wiring on the earphone 1. For example, the FPC may be installed extending substantially in close contact with the upper or lower surface of the elastic sheet 301. Insertion blocks 2332 may be installed at both ends of the elastic sheet 301, and the insertion blocks 2332 at both ends may be inserted and connected to the sound generating unit 100 and the contact unit 400, respectively. A notch 2330 is provided in the elastic sheet 301 at a position close to the insertion block 2332, penetrating through to the side edge of the elastic sheet 301 along the width direction, and the notch 2330 facilitates sealing and provides a higher injection effect.

[0182] Preferably, as shown in Figure 35, the earphone 1 has a reference cross section SF positioned along the length of the ear hook 300, and when worn, the reference cross section is substantially parallel to the horizontal plane of the human body. In the reference cross section, the ear hook 300, the sound generating part 100, and the contact part 400 have an inner contour, and the inner contour includes at least reference points C, E, and H.

[0183] When worn, reference point C is located on the inner contour of the ear hook 300 and is a reference point corresponding to the helix rim (e.g., the uppermost / outermost edge of the helix). Reference point C may also be a turning point of the inner contour, for example, the inner contour as a whole is a contour line that protrudes on the opposite side from the helix E17. The radius of curvature of a portion of the inner contour located in the vicinity of the helix rim gradually increases from reference point C toward the sound generation part 100 and the contact part 400, respectively, then gradually decreases, and then gradually increases again.

[0184] In some embodiments, in the natural state, the outer wall surface of the sound generating unit 100 and the outer wall surface of the contact unit 400 do not come into contact, and the outer wall surface of the sound generating unit 100 and the outer wall surface of the contact unit 400 have a position where the distance between them is shortest, and the midpoint of the connecting line between the shortest distance between them is point O. In the natural state, when the outer wall surface of the sound generating unit 100 and the outer wall surface of the contact unit 400 come into contact, the length of the shortest connecting line between the outer wall surface of the sound generating unit 100 and the outer wall surface of the contact unit 400 is approximately 0, and in this case, point O should be the midpoint of the arc formed corresponding to the contact area between the outer wall surface of the sound generating unit 100 and the outer wall surface of the contact unit 400. Reference point C is the reference point of the inner contour that is the largest distance from point O. Reference point L is the point of the sound generating unit 100 that is closest to reference point C. Reference point K is the point of the sound generating unit 100 that is furthest from reference point C.

[0185] Preferably, as shown in Figure 35, a connecting line CE is formed between reference point C and reference point E, a connecting line CH is formed between reference point C and reference point H, in its natural state the length of connecting line CE is 16 to 19 mm, the length of connecting line CH is 6.5 to 9.0 mm, the angle between connecting line CE and connecting line CH is 72° to 88°, the inner contour between reference point C and reference point E is located outside of connecting line CE, and the inner contour between reference point C and reference point H is located outside of connecting line CH.

[0186] During the experience of wearing and using the ear cuff-type earphone 1, contact between the inner contour of the earphone 1 and the earlobe significantly affects the comfort of wearing the earphone 1 over a long period of time, thus impacting the wearer's user experience.

[0187] If the angle between connecting wire CE and connecting wire CH is too small, the inner contour of the earphone 1, particularly the inner contour between reference point C and reference point E, and the inner contour between reference point C and reference point H, will not be able to bypass the helix as much as possible. If the angle is too large, the dimensions of the overall structure of the earphone 1 will increase, affecting the overall aesthetics of the earphone 1. Therefore, by setting the angle between connecting wire CE and connecting wire CH within the range of 72° to 88°, it is ensured that the inner contour of the earphone 1 bypasses the helix as much as possible, reducing contact between the inner contour of the earphone 1 and the helix, and effectively improving the wearing comfort and aesthetics of the earphone 1. For example, in some embodiments, the angle between connecting wire CE and connecting wire CH may be set to 80°.

[0188] Furthermore, if the length of the connecting wire CE is too short, the sound generating unit 100 cannot enter the concha, affecting the sound quality of the earphone 1. Alternatively, if the length of the connecting wire CE is too long, after the sound generating unit 100 enters the concha, the inner contour of the earphone 1, particularly the position of reference point C, will come into contact with the helix. This increases the overall dimensions of the earphone 1, affecting its aesthetic appeal. By setting the length of the connecting wire CE within the range of 16 to 19 mm, it is possible to ensure that the sound generating unit 100 enters the concha stably and that the inner contour and the sound generating unit 100 do not come into contact with the helix E17. This effectively improves the wearing comfort and aesthetic appeal of the earphone 1, as well as the sound transmission quality of the earphone 1. Furthermore, if the length of the connecting wire CH is too short, the contact portion 400 will come into contact with the earlobe, and if its length is too long, the overall dimensions of the earphone 1 will increase, affecting the aesthetics of the earphone 1. By setting the length of the connecting wire CH to 6.5 to 9.0 mm, it is possible to ensure that the inner contour of the earphone 1 bypasses the earlobe as much as possible, thereby ensuring that the inner contour of the earphone 1 and the contact portion 400 do not come into contact with the earlobe, and thereby effectively improve the wearing comfort of the earphone 1. For example, in some embodiments, the length of the connecting wire CE is set to 17.13 mm and the length of the connecting wire CH is set to 7.59 mm.

[0189] Preferably, the arc-to-chord ratio of the inner contour between reference point C and reference point E is 1.02 to 1.20. Preferably, the arc-to-chord ratio of the inner contour between reference point C and reference point H is 1.05 to 1.23.

[0190] Specifically, the arc-to-chord ratio of the inner contour between reference point C and reference point H is the ratio of the actual length of the inner contour between reference point C and reference point H to the length of the connecting line CE. For example, in some embodiments, the inner contour is a curved circular arc, and the arc-to-chord ratio of the inner contour between reference point C and reference point E is the ratio of the arc length of the inner contour between reference point C and reference point E to the length of the connecting line CE. In this embodiment, the inner contour between reference point C and reference point E is a continuous circular arc projecting on the opposite side from the connecting line CE. In other embodiments, the inner contour does not have to be set as a curve, but may be a series of polylines or the like.

[0191] If the arc-to-chord ratio of the inner contour between reference point C and reference point E is too small, the inner contour between reference point C and reference point E will be flat, which is unfavorable for the inner contour between reference point C and reference point E to bypass the helix. Conversely, if the arc-to-chord ratio of the inner contour between reference point C and reference point E is too large, the inner contour between reference point C and reference point E will be excessively curved, affecting the overall aesthetics of the earphone 1. Therefore, by setting the arc-to-chord ratio of the inner contour between reference point C and reference point E within the range of 1.02 to 1.20, the inner contour between reference point C and reference point E can be made to bypass the helix as much as possible and avoid contact with the helix, thereby effectively improving the wearing comfort of the earphone 1 and effectively improving the aesthetics of the earphone 1. For example, in some embodiments, the arc-to-chord ratio of the inner contour between reference point C and reference point E may be set to 1.1.

[0192] Preferably, on the side facing the contact portion 400 between reference point L and reference point K, the arc-to-chord ratio of the outer wall surface of the sound generating unit 100 is 1.4 to 1.7. By setting it in this way, the side of the sound generating unit 100 facing the contact portion 400 becomes closer to a sphere. On the side facing the contact portion 400 between reference point L and reference point K, the outer wall surface of the sound generating unit 100 is a continuous circular arc surface that protrudes toward the contact portion 400. For example, in some embodiments, the arc-to-chord ratio of the outer wall surface of the sound generating unit 100 on the side facing the contact portion 400 between reference point L and reference point K may be set to 1.64.

[0193] Preferably, a connecting line CL is formed between reference point C and reference point L, and the connecting line CL is located between connecting line CE and connecting line CH, the length of connecting line CL is 13 to 17 mm, and the angle between connecting line CL and connecting line CE is 15° to 27°.

[0194] Specifically, since the reference point L is a special point closest to the reference point C of the sound generation unit 100, the angle between the connecting wire CL and the connecting wire CE determines to some extent whether the sound generation unit 100 can be adequately positioned within the concha, and the length of the connecting wire CL determines to some extent whether the inner contour of the earphone 1 can be prevented from contacting the helix when the sound generation unit 100 is adequately positioned within the concha. Therefore, by setting the length of the connecting wire CL to 13-17 mm and the angle between the connecting wire CL and the connecting wire CE to 15°-27°, the inner contour can be prevented from contacting or pressing against the helix, and the sound generation unit 100 can be adequately positioned within the concha, thereby effectively improving the wearing comfort of the earphone 1 and effectively improving the sound transmission quality of the earphone 1. For example, in some embodiments, the length of the connecting wire CL is set to 15 mm, and the angle between the connecting wire CL and the connecting wire CE is set to 21°.

[0195] Preferably, a connecting line CK is formed between reference point C and reference point K, and the connecting line CK is located between connecting line CE and connecting line CH, the length of connecting line CK is 24 to 30 mm, and the angle between connecting line CK and connecting line CE is 13 to 25°.

[0196] When the earphone 1 is worn, the reference point K is closest to the ear canal. If the reference point K is too close to the ear canal, it will block the ear canal and affect the user experience. If the reference point K is too far from the ear canal, it will affect the sound transmission effect of the earphone 1. Therefore, by setting the length of the connecting wire CK to within the range of 24 to 30 mm and the angle between the connecting wire CK and the connecting wire CE to within the range of 13 to 25°, the distance between the area of ​​the sound generating unit 100 that is close to the reference point K and the ear canal can be appropriately maintained when the sound generating unit 100 enters the concha. This effectively prevents the sound generating unit 100 from blocking the ear canal and effectively improves the sound transmission effect of the earphone 1. For example, in some embodiments, the length of the connecting wire CK may be set to 27.7 mm, and the angle between the connecting wire CK and the connecting wire CE may be set to 20°.

[0197] Preferably, as shown in Figure 35, along the inner contour, there are arc segments T1 and T2 between two points located on both sides of reference point C, 6 mm apart from reference point C, with the arc length-chord ratio of arc segments T1 and T2 being 1.03 to 1.10. By setting it in this way, stress concentration can be effectively reduced, the service life and reliability of the ear hook 300 can be effectively improved, and it is advantageous for ensuring the wearing stability of the earphone 1.

[0198] The above description represents only a limited number of embodiments of the present application and is not intended to limit the scope of protection of the present application. Any conversion of equivalent devices or processes based on the description and drawings of the present application, or any direct or indirect application to other related technical fields, is also included within the scope of protection of the present application. [Explanation of Symbols]

[0199] 1 earphones 10 Housing 1 100 Voice generation unit 110 First containment cavity 111 Sound emission hole 112 Depressurization holes 20 Voice generation assembly 201 First Acoustic Cavity 202 Second Acoustic Cavity 203 First tone channel 204 Second tone channel 21 speakers 22 Diaphragm 23 Voice coil 24 Magnetic Circuit Systems 25 frames

Claims

1. It includes a sound generation unit, and the sound generation unit is A first housing that forms a first accommodation cavity, An earphone comprising a sound generating assembly including two speakers, which is installed in the first housing cavity, each speaker including a diaphragm, the two speakers engaging with each other along the axial direction to form a first acoustic cavity between the two speakers, the sound generating assembly and the first housing engaging with each other to form a second acoustic cavity between the sound generating assembly and the first housing, which is separated from the first acoustic cavity, the first housing is provided with a sound emission hole communicating with the first acoustic cavity and a pressure relief hole communicating with the second acoustic cavity, sound generated on one side of the diaphragms of the two speakers is output through the first acoustic cavity and the sound emission hole, and sound generated on the other side of the diaphragms of the two speakers is output through the second acoustic cavity and the pressure relief hole.

2. The earphone according to claim 1, characterized in that the two speakers have the same acoustic characteristics and are installed coaxially along the axial direction.

3. The earphone according to claim 1, wherein the sound generating assembly further includes an annular mounting bracket, the two speakers each engage with both ends of the mounting bracket to form the first acoustic cavity, and the mounting bracket is provided with a first sound guide hole that connects the sound emission hole to the first acoustic cavity.

4. The earphone according to claim 3, wherein each of the two speakers includes a voice coil, a magnetic circuit system, and a frame, the frame supporting the diaphragm and the magnetic circuit system, the voice coil being connected to the diaphragm and positioned within a magnetic field formed by the magnetic circuit system, and the frames of the two speakers each engage with the mounting bracket.

5. The earphone according to claim 1, wherein each of the two speakers includes a voice coil, a magnetic circuit system, and a frame, the frame supports the diaphragm and the magnetic circuit system, the voice coil is connected to the diaphragm and is placed in a magnetic field formed by the magnetic circuit system, the frames of the two speakers engage with each other to form the first acoustic cavity, and at least one of the frames of the two speakers is provided with a first sound guide hole that connects the sound outlet to the first acoustic cavity.

6. The earphone according to claim 4 or 5, characterized in that the ends of the diaphragms of the two speakers opposite to the magnetic circuit system are installed adjacent to each other, and the first acoustic cavity is formed between the diaphragms of the two speakers.

7. The earphone according to claim 6, characterized in that the sound emission hole and the first sound guide hole communicate with each other along the radial direction of the sound generation assembly, the sound emission hole and the first sound guide hole are each strip-shaped, and the longitudinal direction of the sound emission hole and the first sound guide hole is installed along the circumferential direction of the sound generation assembly.

8. The earphone according to claim 7, characterized in that the distance between the mounting edges of the diaphragms of the two speakers along the axial direction is 1.6 to 2.5 mm, the radial dimension of the first acoustic cavity is 7.5 to 9.5 mm, and the area of ​​the sound emission hole and the first sound guide hole is 5 to 18 mm².

9. The earphone according to claim 6, characterized in that a second sound guide hole is provided in each of the frames of the two speakers, and the second sound guide hole communicates the side of the corresponding diaphragm facing the magnetic circuit system with the second acoustic cavity.

10. The earphone according to claim 9, characterized in that the sides of the diaphragms of the two speakers facing the magnetic circuit system share the second acoustic cavity and the depressurization hole.

11. The earphone according to claim 9, characterized in that the second acoustic cavity includes two separate sub-acoustic cavities, the first housing is provided with the depressurization holes communicating with each of the sub-acoustic cavities, and the sides of the diaphragms of the two speakers facing the magnetic circuit system each communicate with the corresponding sub-acoustic cavities and the depressurization holes.

12. The earphone according to claim 9, characterized in that the second sound guide holes are plurality and are spaced apart along the circumferential direction of the sound generating assembly, the frame is provided with pads located between two of the second sound guide holes, and the distance from some of the second sound guide holes to the decompression holes is smaller than the distance from the pads to the decompression holes.

13. The earphone according to claim 12, characterized in that the distance from some of the second sound guide holes to the depressurization holes is 0.5 mm or less.

14. The earphone according to claim 12, characterized in that the second sound guide hole and the pad, which are closest to the pressure relief hole, are positioned opposite each other along the radial direction of the sound generating assembly.

15. The earphone according to claim 6, characterized in that one end of each of the magnetic circuit systems opposite to the diaphragm is installed protruding from the frame, and the radial dimension of the portion of the magnetic circuit system protruding from the frame is smaller than the radial dimension of the support position of the frame relative to the diaphragm.

16. The earphone according to claim 15, characterized in that the ratio of the axial dimension of the sound generating assembly to the radial dimension of the support position of the frame with respect to the diaphragm is 0.8 to 1.

3.

17. Mounting bosses are provided on the sound generation assembly, the first sound guide hole is mounted on the mounting bosses, and the mounting bosses abut against the first housing at the outer circumference of the sound emission hole, thereby separating the first sound guide hole and the sound emission hole from the second acoustic cavity, or The earphone according to claim 4 or 5, characterized in that a mounting boss is provided on the first housing, the sound emission hole is provided on the mounting boss, and the mounting boss abuts against the sound generation assembly on the outer circumference of the first sound guide hole, thereby separating the first sound guide hole and the sound emission hole from the second acoustic cavity.

18. The earphone according to claim 17, wherein the sound generating assembly further includes a mounting bracket, the mounting boss is located on the mounting bracket, the mounting bracket further includes a notched annular bracket body connected to the mounting boss along the circumferential direction of the sound generating assembly, the bracket body is provided with two first support surfaces facing each other along the axial direction, the outer end surfaces of each of the two frames on the side close to the diaphragm are each supported by the corresponding first support surfaces, and the mounting bosses each protrude from the bracket body along the axial direction and the radial direction of the sound generating assembly and are located outside the outer circumferential surfaces of the two frames.

19. The earphone according to claim 18, wherein the bracket body includes a support portion and a position limiting portion, the position limiting portion is connected to the support portion, the first support base surface is installed on the support portion, the position limiting portion protrudes from the first support base surface along the axial direction and is fitted into the frame to limit the position of the frame along the radial direction of the sound generation assembly, or the bracket body is provided with a recess, a part of the frame is fitted into the recess to limit the position of the frame along the radial direction of the sound generation assembly.

20. The earphone according to claim 19, characterized in that sealant is installed between the outer end surfaces of the two frames and the first support base surface, and between the inner circumferential surface of the mounting boss and the outer circumferential surfaces of the two frames, respectively.

21. The earphone according to claim 20, characterized in that a first corner cut surface is provided at the corner of the frame adjacent to the connection position between the outer peripheral surface of the position limiting portion and the first support base surface to form a first adhesive storage groove, and a second corner cut surface is provided at the corner of the support portion adjacent to the connection position between the outer end surface of the frame and the outer peripheral surface of the frame to form a second adhesive storage groove.

22. The earphone according to claim 21, characterized in that a third corner cut surface is provided at the corner of the mounting boss adjacent to the outer circumferential surfaces of the two frames, thereby forming a third adhesive receiving groove.

23. The earphone according to claim 21, characterized in that the second corner cut surface and the third corner cut surface are connected to each other.

24. The earphone according to claim 19, further comprising a second support base surface on the frame, the second support base surface being located inside the outer end surface of the frame along the radial direction of the sound generation assembly and spaced apart from the outer end surface of the frame along the axial direction, the mounting edge of the diaphragm being supported by the second support base surface, and at least a portion of the projection of the position limiting portion along the axial direction being on the second support base surface.

25. The earphone according to claim 18, characterized in that the mounting bracket is a plastic molded product, the radial thickness of the mounting boss is 0.2 to 0.7 mm, the mounting boss is installed along the width direction of the first sound guide hole and includes a connecting bridge connected to the long side edge of the first sound guide hole, and the first sound guide hole is divided by the connecting bridge into at least two first sub-sound guide holes spaced apart from each other along the length direction of the first sound guide hole.

26. The earphone according to any one of claims 1 to 25, characterized in that the two frames each have pads and sound holes spaced apart from each other along the circumferential direction of the sound generation assembly, the sound holes communicate the corresponding side of the diaphragm facing the magnetic circuit system with the second acoustic cavity, each frame and the mounting bracket are provided with a position limiting structure that engages with each other, the position limiting structure restricts the position of the frame and the mounting bracket along the circumferential direction of the sound generation assembly, the position limiting structures of the two frames are installed opposite each other along the axial direction, the sound generation assembly is installed along the axial direction and has a radial plane passing through the position limiting structure, the pads of each frame are installed so as to be mirror symmetric with respect to the radial plane, and the sound holes of each frame are each mirror symmetric with respect to the radial plane.

27. The earphone according to claim 17, further comprising an ear hook and a contact portion, wherein the ear hook connects the sound generating portion and the contact portion, and when worn, the sound generating portion and the contact portion form a clamping state on both sides of the user's earlobe, the sound generating portion is located in the concha cavity, the first housing includes a first rigid housing and a second rigid housing, the first rigid housing is connected to the ear hook, the first housing cavity is surrounded by the first rigid housing and the second rigid housing, and the sound emission port is installed in the second rigid housing.

28. The earphone according to claim 27, characterized in that the second rigid housing is provided with a bump protruding from the end face of the second rigid housing, the first rigid housing is provided with a groove recessed from the end face of the first rigid housing, the bump is fitted into the groove, and a part of the sound emission hole is installed on the bump.

29. The earphone according to claim 27, characterized in that the mounting boss is located on the second rigid housing or the sound generating assembly, a third support base is installed inside the first rigid housing, and the first rigid housing and the second rigid housing are fixed together by the mounting boss, thereby the sound generating assembly and the second rigid housing abut against each other.

30. The earphone according to claim 29, characterized in that when the sound generating assembly and the second rigid housing are in contact with each other by the mounting boss, the end face of the first rigid housing and the end face of the second rigid housing maintain a constant gap along the direction in which the sound generating assembly and the second rigid housing are in contact.

31. The axial direction is perpendicular to the direction of contact between the sound generating assembly and the second rigid housing, the two speakers each include a voice coil, a magnetic circuit system and a frame, the frame supports the diaphragm and the magnetic circuit system, the voice coil is connected to the diaphragm and is positioned in a magnetic field formed by the magnetic circuit system, the sides of the diaphragms of the two speakers opposite to the magnetic circuit system are positioned adjacent to each other, the first acoustic cavity is formed between the diaphragms of the two speakers, the magnetic circuit system includes a permeable cover positioned protruding from the frame and a magnetic material positioned within the permeable cover, and the third support surface is positioned to support the permeable covers of the two speakers, the earphone according to claim 29.

32. The earphone according to claim 1, further comprising a contact portion and an ear hook, wherein the ear hook connects the sound generating portion and the contact portion, and when worn, the sound generating portion and the contact portion form a clamping state on both sides of the user's earlobe, the sound generating portion is located in the concha cavity, and the sound emission hole and the decompression hole are each installed mirror-symmetrically with respect to a plane of symmetry installed along the length direction of the ear hook.

33. The earphone according to claim 32, characterized in that, in the plane of symmetry, the minimum distance between the sound emission hole and the pressure reduction hole is 6.5 to 10 mm.

34. The earphone according to claim 32, characterized in that, in the plane of symmetry, the decompression hole is positioned toward the earlobe, and the sound emission hole and the decompression hole are spaced apart from each other by the contact area between the first housing and the ear portion.

35. The earphone according to claim 32, characterized in that the sound emission hole is one and is in the shape of a strip, and the plane of symmetry is set along the length direction of the sound emission hole and is perpendicular to the axial direction.

36. The earphone according to claim 32, characterized in that the pressure relief hole is one, is in the shape of a strip, and the plane of symmetry is installed along the width direction of the pressure relief hole and is perpendicular to the axial direction.

37. The earphone according to claim 36, characterized in that the decompression hole includes a first hole portion and a second hole portion along the longitudinal direction of the decompression hole, and a third hole portion connected between the first hole portion and the second hole portion, wherein the width of at least a portion of the first hole portion and the second hole portion is greater than the width of the third hole portion.

38. The earphone according to claim 32, characterized in that the plane of symmetry is the plane of symmetry of the ear hook.

39. The earphone according to claim 1, further comprising an ear hook and a contact portion, wherein the ear hook connects the sound generating portion and the contact portion, and when worn, the sound generating portion and the contact portion form a clamping state on both sides of the user's earlobe, the sound generating portion is located in the concha cavity, the first housing comprises a first rigid housing, a second rigid housing and a first flexible body, the first housing cavity is surrounded by the first rigid housing and the second rigid housing, the first flexible body is installed on the outer wall of the second rigid housing and used to contact the concha cavity, the plane on which the outermost annular line of the end face of the first flexible body is located is a first reference plane, the midpoint along the axis of the sound generating assembly or the axis of the sound generating assembly is located on the side of the first reference plane toward the first rigid housing and is parallel to the first reference plane.

40. The earphone according to claim 39, characterized in that the midpoint of the sound generation assembly along the axis or the distance from the axis to the first reference plane is 0.4 to 4 mm.

41. The earphone according to claim 39, characterized in that the sound generating unit is installed in the concha cavity so as to keep at least a portion of the ear canal open.

42. An earphone comprising a sound generating assembly including two speakers, each speaker including a diaphragm, the two speakers engaging with each other along the axial direction, the diaphragms of the two speakers being positioned adjacent to each other, and the ratio of the maximum axial dimension to the maximum radial dimension of the sound generating assembly being 0.8 to 1.

3.

43. An earphone comprising a sound generating assembly including two speakers, each speaker including a diaphragm, the diaphragms of the two speakers being positioned adjacent to each other along the axial direction, the resonant peak frequencies of the diaphragms of the two speakers being 200 to 300 Hz, and the absolute difference between the resonant peak frequencies of the diaphragms of the two speakers being 50 Hz or less.

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