Ear clip type earphone

Abstract

Some embodiments of the present specification provide an ear clip type earphone, comprising: a sounding part configured to be inserted into a conchae cavity of a wearer when worn, the sounding part comprising: a housing having an accommodating cavity; the first sound driver and the second sound driver are jointly contained in the containing cavity, and a first sound transmission channel is formed between a first vibrating diaphragm of the first sound driver and a second vibrating diaphragm of the second sound driver; the sound outlet hole is formed in the shell, and the sound outlet hole is in acoustic communication with the first sound transmission channel and leads out sound generated by the first sound driver and the second sound driver; the abutting part is configured to abut against the back of the ear of a wearer when the earphone is worn; and the ear hook is configured to bypass the antihelix and the helix of the wearer during wearing and connect the sound production part and the abutting part.

Description

Cross-reference

[0001] This application claims priority to a Chinese application with application number 202311701969.7 filed on December 11, 2023, the entire content of which is incorporated herein by reference. Technical Field

[0002] This application relates to the field of sound-producing devices, and more particularly to an earclip-type earphone. Background Art

[0003] With the development of acoustic output technology, acoustic devices (e.g., earphones) have been widely used in people's daily lives and can be used in conjunction with electronic devices such as mobile phones and computers to provide an auditory function for the wearer. Earclip-type earphones are a new type of earphone, which are usually small in size and can be clipped near the wearer's helix for use. When wearing an earclip-type earphone, the sound-producing part is inserted into the concha cavity. Its characteristic of not blocking the ear canal can ensure safety in outdoor scenarios and is more comfortable to wear compared to in-ear earphones. However, limited by the volume of the concha cavity, there are many restrictions on the volume of the sound-producing part of the earclip-type earphone, which to a certain extent leads to problems such as insufficient volume and unsatisfactory sound quality in earclip-type earphones.

[0004] Therefore, it is necessary to propose an earclip-type earphone to improve the output performance of earclip-type earphones. Summary of the Invention

[0005] An embodiment of this application provides an earclip-type earphone, including: a sound-producing part configured to be inserted into the wearer's concha cavity when worn, the sound-producing part including: a housing having an accommodation cavity; a first sound driver and a second sound driver jointly accommodated in the accommodation cavity, a first sound transmission channel being formed between a first diaphragm of the first sound driver and a second diaphragm of the second sound driver; a sound outlet hole located on the housing, the sound outlet hole being acoustically connected to the first sound transmission channel and guiding out the sounds generated by the first sound driver and the second sound driver; a contact part configured to contact the back of the wearer's ear when worn; and an ear hook configured to bypass the wearer's antitragus and helix when worn and connect the sound-producing part and the contact part. Brief Description of the Drawings

[0006] This application will be further described by way of exemplary embodiments, which will be described in detail through the drawings. These embodiments are not restrictive. In these embodiments, the same numbers represent the same structures, where:

[0007] Figure 1 is an exemplary wearing schematic diagram of an earclip-type earphone shown in some embodiments of this specification;

[0008] Figure 2 is a schematic structural diagram of an earclip - type earphone shown in some embodiments of this specification;

[0009] Figure 3 is a schematic cross - sectional view of the sound - generating part in a direction perpendicular to the length of the earhook shown in some embodiments of this specification;

[0010] Figure 4 is a schematic cross - sectional view of the earclip - type earphone on the first symmetry plane shown in some embodiments of this specification;

[0011] Figure 5 is a schematic cross - sectional view of the earclip - type earphone on a horizontal plane shown in some embodiments of this specification;

[0012] Figure 6 is a sound pressure curve graph received by a test microphone when the sound - generating part or sound - generating component is at different positions of the test microphone shown in some embodiments of this specification;

[0013] Figure 7A is a schematic diagram of the position setting of the sound outlet holes shown in some embodiments of this specification;

[0014] Figure 7B is a schematic diagram of the wearing state of the earclip - type earphone shown in some embodiments of this specification;

[0015] Figure 8 is a schematic diagram of the wearing state at different 3 angles shown in some embodiments of this specification;

[0016] Figure 9 is a schematic cross - sectional view of the earclip - type earphone on the first symmetry plane shown in some other embodiments of this specification;

[0017] Figure 10 is a schematic cross - sectional view of the sound - generating part on the first symmetry plane shown in some other embodiments of this specification;

[0018] Figure 11 is a schematic cross - sectional view of the sound - generating part on the first symmetry plane shown in some other embodiments of this specification;

[0019] Figure 12 is a schematic cross - sectional view of two sound drivers in a plane defined by the axial and radial directions of the first magnetic shield shown in some embodiments of this specification;

[0020] Figure 13 is a top - view of the connection of the first sound driver, the second sound driver and the mounting bracket shown in some embodiments of this specification;

[0021] Figure 14The front view when the first sound driver, the second sound driver and the mounting bracket are connected as shown in some embodiments of this specification;

[0022] Figure 15 The schematic structural diagram when the first sound driver, the second sound driver and the mounting bracket are connected as shown in some other embodiments of this specification;

[0023] Figure 16 The assembly schematic diagram of the first sound driver, the second sound driver and the mounting bracket as shown in some embodiments of this specification;

[0024] Figure 17 The cross-sectional schematic diagram of another sound generating part in the plane of the axial direction and the radial direction as shown in some embodiments of this specification;

[0025] Figure 18 The schematic structural diagram of the earclip-type earphone as shown in some embodiments of this specification;

[0026] Figure 19 The cross-sectional schematic diagram of the sound generating part in the plane parallel to the first symmetry plane as shown in some embodiments of this specification. Detailed implementation manners

[0027] In order to more clearly illustrate the technical solutions of the embodiments of this specification, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some examples or embodiments of this specification. For those of ordinary skill in the art, without creative efforts, this specification can also be applied to other similar scenarios based on these drawings. Unless obvious from the language context or otherwise stated, the same reference numerals in the drawings represent the same structure or operation.

[0028] Those skilled in the art can understand that the terms "first", "second", etc. in this specification are only used to distinguish different devices, modules or parameters, etc., and neither represent any specific technical meaning nor indicate an inevitable logical order between them.

[0029] As shown in this specification and the claims, unless the context clearly indicates an exceptional situation, the words "a", "an", "one" and / or "the" etc. do not specifically refer to the singular, but may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0030] This specification covers any alternatives, modifications, equivalent methods, and solutions defined by the claims that fall within the spirit and scope of this specification. Further, to enable the public to better understand this specification, in the following detailed description of this specification, some specific details are described in detail. Those skilled in the art can fully understand this specification without the description of these details.

[0031] To more clearly illustrate the technical solutions of the embodiments of this application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some examples or embodiments of this application. For those of ordinary skill in the art, without creative efforts, this application can also be applied to other similar scenarios based on these drawings. Unless obvious from the context or otherwise stated, the same reference numerals in the figures represent the same structure or operation.

[0032] It should be understood that the terms "system", "device", "unit", and / or "module" used herein are a way to distinguish different components, elements, parts, portions, or assemblies at different levels. However, if other words can achieve the same purpose, the said words can be replaced by other expressions.

[0033] As shown in this application and the claims, unless the context clearly indicates an exception, words such as "a", "an", "one", and / or "the" are not specifically singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0034] In the description of this specification, it should be understood that the terms "first", "second", "third", "fourth", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", "fourth" may explicitly or implicitly include at least one of such features. In the description of this specification, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In this specification, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, the term "connection" can refer to a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this specification can be understood according to specific circumstances.

[0036] Figure 1 is an exemplary wearing schematic diagram of an earclip-type earphone shown according to some embodiments of this specification. Figure 2 is a structural schematic diagram of an earclip-type earphone shown according to some embodiments of this specification. In some embodiments, the earclip-type earphone 200 may include, but is not limited to, an air conduction earphone, a bone-air conduction earphone, and an earphone combining air conduction and bone conduction. As Figures 1 - 2 shown, the earclip-type earphone 200 may include a sound generating part 21 (or referred to as a sound generating assembly), an abutting part 26, and an ear hook 27 connecting the sound generating part 21 and the abutting part 26. The earclip-type earphone 200 can be clamped on the wearer's ear 100 through the cooperation of the ear hook 27, the sound generating part 21, and the abutting part 26.

[0037] In some embodiments, when the earclip-type earphone 200 is in a wearing state, the sound generating part 21 is located inside the wearer's concha 102 and is in contact with the inner wall of the concha 102. The abutting part 26 abuts against the back of the wearer's ear, for example, against the back of the concha 102. Both ends of the ear hook 27 are respectively connected to the abutting part 26 and the sound generating part 21, and a middle area between both ends of the ear hook 27 forms an extension section with a certain curvature, so that the ear hook 27 can bypass the wearer's antihelix 104 and helix 106 when worn. The ear hook 27 can have elasticity, which is manifested as when the sound generating part 21 is far from the abutting part 26, the ear hook 27 can provide an elastic force to drive the sound generating part 21 to approach the abutting part 26. In the wearing state, the elastic force of the ear hook 27 can be converted into a clamping force that clamps the sound generating part 21 and the abutting part 26 on the front and back sides of the concha 102, ensuring the wearing stability.

[0038] In some embodiments, in order to match the shape of the concha 102, the outer shape of the sound generating part 21 needs to be close to the shape of the concha 102, such as spherical, spheroid-like, or spindle-like, etc., so that the sound generating part 21 can fully contact the inner wall of the concha 102 and cooperate with the abutting part 26 to clamp on the front and back sides of the concha 102. Limited by the spatial size of the concha 102, the housing volume of the sound generating part 21 is small, which limits the size of the acoustic driver accommodated inside the housing, resulting in a low sound generating efficiency of the sound generating part 21.

[0039] On this basis, some embodiments of this specification propose an earclip-type earphone. Inside the housing of the sound generating part of this earclip-type earphone, two sound drivers are provided, and a first sound transmission channel is formed between the diaphragms of the two sound drivers. By providing a sound outlet hole on the housing of the sound generating part to be acoustically connected to the first sound transmission channel, the sounds generated by the two sound drivers can be exported simultaneously, improving the user's listening volume. Further, by optimizing the structures and arrangement manners of the two acoustic drivers, the overall structure formed by the two acoustic drivers can be better adapted to the internal space of the housing of the sound generating part, thereby making full use of the limited space of the housing of the sound generating part and further improving the sound generating efficiency of the sound generating part. When the sound generating part of the earclip-type earphone proposed in this specification extends into the concha, it can not only make full and effective use of the internal space of the housing of the sound generating part, but also improve the overall sound generating efficiency of the sound generating part, significantly improving the wearing comfort and sound quality of the earclip-type earphone.

[0040] Figure 3 It is a schematic cross-sectional view of the sound generating part shown in some embodiments of this specification in a direction perpendicular to the length direction of the ear hook. Figure 4 It is a schematic cross-sectional view of the earclip-type earphone shown in some embodiments of this specification on the first symmetry plane. Figure 5 It is a schematic cross-sectional view of the earclip-type earphone shown in some embodiments of this specification on a horizontal plane. Combining Figures 1 - 5 As shown, the ear hook 27 has a first symmetry plane A1. The first symmetry plane A1 is a plane that divides the ear hook 27 into two symmetric parts along the length direction of the ear hook 27. The first symmetry plane A1 is parallel or substantially parallel to the length direction of the ear hook 27. Therefore, the first symmetry plane A1 can also be referred to as the symmetry plane in the length direction of the ear hook. The length direction of the ear hook 27 refers to the direction extending from the end of the ear hook 27 connected to the abutting part 26 to the end of the ear hook 27 connected to the sound generating part 21. The length direction of the ear hook 27 can be represented by Figure 5 the arrow Z in.

[0041] In some embodiments, the ear hook 27 can include, but is not limited to, a hook structure, an elastic band, a metal wire, or a metal sheet, etc., so that the earclip-type earphone 200 can be better fixed on the wearer and prevent it from falling off during wearing.

[0042] In some embodiments, combining Figures 1 - 4As shown, the abutting portion 26 abuts against the back of the wearer's ear, and cooperates with the sound generating portion 21 to form a clamping shape to clamp the ear 100. In some embodiments, the abutting portion 26 may have a second housing 261, and the abutting portion 26 is connected to the earhook 27 through the second housing 261. The second housing 261 may form a receiving space. In some embodiments, the receiving space formed by the second housing 261 may serve as a battery compartment for accommodating a battery and / or other components (such as a circuit board). In some embodiments, the battery may supply electrical energy to the earclip-type earphone 200. For example, the battery may be electrically connected to the sound generating portion 21 to supply electrical energy to the sound generating portion 21. In some embodiments, the circuit board may be electrically connected to the sound generating portion 21 (for example, through a wire or a flexible circuit board) so that the circuit board can control the sound generation of the sound generating portion 21. In some embodiments, both the circuit board and the battery may be disposed in the receiving space formed by the second housing 261. In some embodiments, the circuit board and the battery may also be respectively disposed in the receiving space formed by the second housing 261 and the housing 210 of the sound generating portion 21, and the circuit board and the battery may be electrically connected to each other through corresponding conductors and further electrically connected to the sound generating portion through the conductors. In some embodiments, both the circuit board and the battery may also be disposed in the housing 210 of the sound generating portion 21.

[0043] The sound generating portion 21 is the sound generating device of the earclip-type earphone 200. As Figure 3 shown, the sound generating portion 21 may include a housing 210, a first sound driver 220, a second sound driver 230, and a sound outlet hole 240. The housing 210 has a receiving cavity 211. The first sound driver 220 and the second sound driver 230 are jointly received in the receiving cavity 211. The sound outlet hole 240 is located on the housing 210. The sound outlet hole 240 is used to conduct the sound generated by the first sound driver 220 and the second sound driver 230.

[0044] In some embodiments, the housing 210 may be integrally formed. In some embodiments, the housing 210 may be composed of multiple parts. For example, the housing 210 may include a first rigid housing 214 and a second rigid housing 215, and the first rigid housing 214 and the second rigid housing 215 enclose to form the housing 210 having the receiving cavity 211. One of the two rigid housings (for example, the second rigid housing 215) faces the concha of the wearer's ear and contacts the inner wall of the concha. The other rigid housing is connected to the earhook 27. In some embodiments, the housing 210 may further include a flexible body 216. The outer surface of one of the two rigid housings that contacts the inner wall of the wearer's concha (such as the second rigid housing 215) may be covered with the flexible body 216.

[0045] A sound driver refers to a device that can receive an electrical signal and convert it into a sound signal for output. For example, a speaker, a transducer, etc. The sound driver may include a diaphragm and a magnetic circuit assembly. The magnetic circuit assembly is used to generate a magnetic field. In some embodiments, the magnetic circuit assembly may include a magnet, a magnetic shield, a magnetic plate, and a coil. The diaphragm can vibrate under the action of the magnetic field and the coil, and drive the air around the diaphragm to vibrate. The chamber inside the housing 210 (i.e., the accommodating chamber 211) can be at least divided into a front chamber and a rear chamber by the diaphragm. The front chamber refers to the acoustic cavity formed on the side of the diaphragm facing away from the magnetic circuit assembly. The rear chamber refers to the acoustic cavity formed on the side of the diaphragm close to the magnetic circuit assembly. The sound generated on the side of the diaphragm facing away from the magnetic circuit assembly is led out of the housing 210 through the sound outlet hole 240 coupled to the front chamber. The sound generated on the side of the diaphragm facing the magnetic circuit assembly is led out of the housing 210 through a pressure relief hole (e.g., Figure 18 the pressure relief hole 217 shown).

[0046] In this embodiment, by providing two sound drivers inside the housing 210 of the sound generating part 21, the sounds generated by the two sound drivers can be led out simultaneously, improving the listening volume of the wearer. Figure 6 Exemplarily shows the sound pressure curves received by the test microphone when the sound generating part (e.g., Figure 1 the sound generating part 21 in) and the sound generating component are located at different positions of the test microphone. The test microphone can receive external sound signals. As Figure 6 shown, the figure respectively shows the sound pressure curve 410 received by the test microphone when the sound generating part is directly to the left of the test microphone, the sound pressure curve 420 received by the test microphone when the sound generating part is directly to the right of the test microphone, the sound pressure curve 430 received when the sound generating component is above the left of the test microphone, the sound pressure curve 440 received by the test microphone when the sound generating component is below the left of the test microphone, the sound pressure curve 450 received by the test microphone when the sound generating component is above the right of the test microphone, and the sound pressure curve 460 received by the test microphone when the sound generating component is below the right of the test microphone. Among them, the upper and lower directions in this embodiment respectively correspond to the relative two sides of the test microphone, and the left and right directions also respectively correspond to the relative two sides of the test microphone. The direction from the upper to the lower is different from the direction from the left to the right. The sound pressure curve 410 and the sound pressure curve 420 correspond to the sound generating part with a double diaphragm structure in the embodiments of this specification (e.g., Figure 1 the sound generating part 21 in), and the two diaphragms are connected in parallel with the same voltage. The sound pressure curves 430 - 460 correspond to the sound generating component with a single diaphragm structure. Assuming that the sound pressure at the sound outlet hole of the sound generating component with a single diaphragm is P, then the sound pressure at the sound outlet hole of the sound generating part with two diaphragms connected in parallel with the same voltage is 2P 1 , according to the sound pressure level formula: SPL = 20 * log10(P / Pref) (1)

[0047] Where Pref is the reference sound pressure, the difference in sound pressure level between the sound - generating component with a single - diaphragm structure and the sound - generating part with a double - diaphragm structure can be obtained as follows: Δ = 20*log10(2P / P) = 20*log10(2)≈6dB (2)

[0048] That is, by setting the double - diaphragm structure, the sound pressure level of the sound - generating part can be effectively increased, thereby increasing the listening volume of the wearer.

[0049] As Figure 3 shown, the first sound driver 220 may include a first diaphragm 221 and a first magnetic circuit assembly disposed on one side of the vibration direction of the first diaphragm 221 (for example, a first magnetic conductive plate 225, a first magnet 222, and a first magnetic conductive cover 223 that are successively away from the first diaphragm 221). The second sound driver 230 may include a second diaphragm 231 and a second magnetic circuit assembly disposed on one side of the vibration direction of the second diaphragm 231 (for example, a second magnetic conductive plate 235, a second magnet 232, and a second magnetic conductive cover 233 that are successively away from the second diaphragm 231). A first sound transmission channel 212 is formed between the first diaphragm 221 and the second diaphragm 231. The first sound transmission channel 212 and the first magnetic circuit assembly are respectively located on both sides of the vibration direction of the first diaphragm 221, and the first sound transmission channel 212 is equivalent to the front cavity of the first sound driver 220. The second sound transmission channel 213 and the second magnetic circuit assembly are respectively located on both sides of the vibration direction of the second diaphragm 231, and the first sound transmission channel 212 is also equivalent to the front cavity of the second sound driver 230. The first sound transmission channel 212 serves as the front cavity of both the first sound driver 220 and the second sound driver 230 at the same time. Therefore, the first sound transmission channel 212 is a common front cavity for the first sound driver 220 and the second sound driver 230. The vibration direction of the diaphragm can be the direction perpendicular to the plane where the diaphragm is located, which can be represented by the arrow X in Figure 3 the figure.

[0050] In the case where the first sound driver 220 and the second acoustic driver 230 share a common front cavity, the sound waves in the front cavities of the two sound drivers can be led out of the housing 210 through the same sound outlet hole 240, thereby simplifying the overall structure of the sound - generating part 21 and reducing the manufacturing cost of the sound - generating part 21. In other words, by setting the first sound driver 220 and the second sound driver 230 to share a common front cavity, the number of openings on the housing 210 can be reduced. In addition, when the double - diaphragm structure works together, it has a greater impact on the sound pressure change in the first sound transmission channel 212. When the cross - sectional area of the sound outlet hole 240 remains unchanged, the two sound drivers working together can increase the sound volume led out from the sound outlet hole 240, thereby improving the sound effect.

[0051] In some alternative embodiments, the front cavity of the first sound driver 220 and the front cavity of the second sound driver 230 can be independent of each other and are respectively acoustically communicated with different sound outlet holes.

[0052] In some alternative embodiments, the rear cavity of the first sound driver 220 and the rear cavity of the second sound driver 230 can be independent of each other and are respectively acoustically communicated with different pressure relief holes (for example, Figure 18 the number of the pressure relief holes 217 shown can be two, and the two pressure relief holes 217 are respectively communicated with the rear cavity of the first sound driver 220 and the rear cavity of the second sound driver 230). In some alternative embodiments, the rear cavity of the first sound driver 220 and the rear cavity of the second sound driver 230 can be communicated with each other and radiate sound outward through the same pressure relief hole (for example, Figure 18 the pressure relief hole 217 in). That is, the first acoustic driver 220 and the second acoustic driver 230 share the rear cavity.

[0053] In some embodiments, as shown in combination with Figures 1 - 5 the earclip-type earphone 200 may further include a microphone assembly (not shown in the figure), and the microphone assembly is configured to convert the received sound signal into an electrical signal. In some embodiments, differentiated by the transduction principle, the microphone assembly may include a capacitive microphone, a piezoelectric microphone, a piezoresistive microphone, etc. In some embodiments, differentiated by the sound collection method, the microphone assembly may include an air conduction (i.e., air conduction) microphone or a microphone combination of air conduction and bone conduction. In some embodiments, the microphone assembly may be disposed in the earhook 27, and the microphone assembly may form a third sound transmission channel (not shown in the figure). An acoustic inlet hole (for example, Figure 9 the acoustic inlet hole 280 in) is provided on one side of the earhook 27 close to the sound generating part 21, and the acoustic inlet hole is acoustically communicated with the third sound transmission channel. The acoustic inlet hole may be symmetric with respect to the first symmetry plane A1. In this embodiment, the sound signal (for example, the signal generated when the wearer speaks) can be transmitted to the third sound transmission channel through the acoustic inlet hole, received by the microphone assembly through the third sound transmission channel, and then processed by the microphone assembly to obtain a corresponding electrical signal. By symmetrically arranging the acoustic inlet hole with respect to the first symmetry plane A1, the effect of the earclip-type earphone 200 on receiving the sound signal by the microphone assembly will not be greatly affected whether it is worn on the left ear or the right ear of the wearer.

[0054] In some embodiments, the first diaphragm 221 and the second diaphragm 231 can be the same or similar. Only as an example, in combination with Figures 3 - 6It can be known that the sound pressure curves 410 and 420 corresponding to the sound generating part with the double diaphragm structure both generate a peak value in the frequency range of 200 Hz to 300 Hz. This peak value is the frequency at which the corresponding sound generating part generates a resonance peak, which is equivalent to the resonance frequencies of both the first diaphragm 221 and the second diaphragm 231 being lower than 300 Hz, and the difference between the resonance frequency of the first diaphragm 221 and the resonance frequency of the second diaphragm 231 being less than 50 Hz. The resonance frequency refers to the first resonance peak that appears in ascending order of frequency when performing an electro-acoustic sweep test on the sound generating part (for example, a structure composed of a sound driver, a housing, and the internal cavity of the housing, etc.). The position where this resonance peak appears corresponds to the position where the impedance curve of the sound generating part suddenly increases. The resonance frequency of the diaphragm refers to the resonance frequency presented after the diaphragm is assembled into a sound driver. In the embodiments of this specification, the resonance peak frequencies of the two diaphragms of the sound generating part 21 are both lower than 300 Hz. For example, the resonance frequencies of the two diaphragms are both between 200 Hz and 300 Hz, which can better display the low-frequency part of the sound signal, thereby providing a better music effect. In addition, when the first diaphragm 221 and the second diaphragm 231 are the same, there is no need to separately manufacture the first diaphragm 221 and the second diaphragm 231, which can reduce the types of manufacturing materials, lower costs and production difficulties.

[0055] In some embodiments, as shown in Figures 3 - 5 , the first diaphragm 221 and the second diaphragm 231 are respectively located on both sides of the first symmetry plane A1, and the first diaphragm 221 and the second diaphragm 231 are symmetric with respect to the first symmetry plane A1. Herein, both sides of the first symmetry plane A1 refer to both sides in the direction perpendicular to the first symmetry plane A1. Being symmetric with respect to the first symmetry plane A1 means that the two diaphragms are mirror-symmetric with respect to the first symmetry plane A1.

[0056] In some cases, when the first diaphragm 221 and the second diaphragm 231 are the same and are mirror-symmetric with respect to the first symmetry plane A1, the costs and production difficulties can be further reduced.

[0057] Further, when the first diaphragm 221 and the second diaphragm 231 are mirror-symmetrical with respect to the first symmetry plane A1, the first magnetic circuit assembly (e.g., the first magnet 222, the first magnetic shield 223, etc.) and the second magnetic circuit assembly (e.g., the second magnet 232, the second magnetic shield 233, etc.) can be set to be mirror-symmetrical with respect to the first symmetry plane A1. Furthermore, the first sound driver 220 and the second sound driver 230 are mirror-symmetrical with respect to the first symmetry plane A1, which can reduce the types of materials for manufacturing the sound generating part 21, and further reduce the cost and production difficulty. At the same time, when the first sound driver 220 and the second sound driver 230 are mirror-symmetrical with respect to the first symmetry plane A1, the overall structure formed by the first sound driver 220 and the second sound driver 230 can be closer to a sphere, a spherical-like shape, or a spindle shape, further adapting to the shape of the accommodation cavity 211 to achieve the purpose of making full use of the space of the accommodation cavity 211.

[0058] In some embodiments, the first diaphragm 221 and the second diaphragm 231 can be approximately symmetrical with respect to the first symmetry plane A1 (i.e., not completely symmetrical). Only as an example, the angle between the plane where the first diaphragm 221 is located and the first symmetry plane A1 is the first angle, and the angle between the plane where the second diaphragm 231 is located and the first symmetry plane A1 is the second angle. When the difference between the first angle and the second angle is between 0 degrees and 5 degrees, it can be considered that the first diaphragm 221 and the second diaphragm 231 are approximately symmetrical with respect to the first symmetry plane A1.

[0059] In some alternative embodiments, the first diaphragm 221 and the second diaphragm 231 can be symmetrical with respect to another plane different from the first symmetry plane A1. Only as an example, the first diaphragm 221 and the second diaphragm 231 can be located on both sides of the first parallel symmetry plane and be symmetrical with respect to the first parallel symmetry plane. The first parallel symmetry plane can be parallel to the first symmetry plane A1. However, the distance between the first diaphragm 221 and the first symmetry plane A1 is different from the distance between the second diaphragm 231 and the first symmetry plane A1.

[0060] In some embodiments, the included angle between the central axis of the sound outlet hole 240 and the central axis of the first sound transmission channel 212 can be made less than a certain value, so that the sound wave in the first sound transmission channel 212 can pass through the sound outlet hole 240 more smoothly, improving the sound quality.

[0061] In some embodiments, the included angle between the central axis of the sound outlet hole 240 and the central axis of the first sound transmission channel 212 may be less than 30 degrees. In some embodiments, the included angle between the central axis of the sound outlet hole 240 and the central axis of the first sound transmission channel 212 may be less than 15 degrees. In some embodiments, the included angle between the central axis of the sound outlet hole 240 and the central axis of the first sound transmission channel 212 may be less than 5 degrees. In some embodiments, the central axis of the sound outlet hole 240 may be parallel to the central axis of the first sound transmission channel 212. Merely by way of example, the central axis of the sound outlet hole 240 is the first central axis. The central axis of the first sound transmission channel 212 is the second central axis. The distance between the first central axis and the second central axis is the first distance. The distance between the plane where the first diaphragm 221 is located and the plane where the second diaphragm 231 is located is the second distance. The ratio of the first distance to the second distance is less than a preset distance ratio. Exemplary preset distance ratios may include 20%, 10%, 5%, etc.

[0062] In some embodiments, the central axis of the sound outlet hole 240 coincides with the central axis of the first sound transmission channel 212, the cross-sectional shape of the sound outlet hole 240 perpendicular to its own central axis is the same as the cross-sectional shape of the first sound transmission channel 212 perpendicular to its own central axis, and the entrance of the sound outlet hole 240 is aligned with the opening of the first sound transmission channel 212. Alignment means that the edge of the entrance of the sound outlet hole 240 is flush with the edge of the opening of the first sound transmission channel 212.

[0063] In some embodiments, in combination Figures 1 - 5 As shown, the sound outlet hole 240 may be provided on the side of the housing 210 facing away from the earhook 27 so that, in the worn state, the sound outlet hole 240 can face the wearer's ear canal.

[0064] In some embodiments, the first symmetry plane A1 may pass through the sound outlet hole 240. In some embodiments, the sound outlet hole 240 may be centrally disposed or offset on the housing 210. For example, the shape of the sound outlet hole 240 is elongated. Along the length direction of the sound outlet hole 240, the first symmetry plane A1 may divide the sound outlet hole 240 into two symmetric parts. Also for example, when the sound outlet hole 240 is offset on the housing 210, the outer end face of the sound outlet hole 240 is asymmetric with respect to the first symmetry plane A1.

[0065] In some embodiments, the inner end face of the sound outlet hole 240 is flush with the inner wall surface of the housing 210, and the outer end face of the sound outlet hole 240 is flush with the outer wall surface of the housing 210. In some embodiments, the projection of the outer end face of the sound outlet hole 240 on the first symmetry plane A1 can form an arc segment. The projection of the housing 210 on the first symmetry plane A1 has an arc-shaped outer contour. At least a part of the arc-shaped outer contour overlaps with the arc segment. For the convenience of description, hereinafter, the arc segment formed by the projection of the outer end face of the sound outlet hole 240 on the first symmetry plane A1 will be simply denoted as the arc segment of the sound outlet hole 240; the arc-shaped outer contour of the projection of the housing 210 on the first symmetry plane A1 will be simply denoted as the arc-shaped outer contour of the housing 210. In some embodiments, the whole sound generating part 21 (or the housing 210) can be approximately spherical, and the projection of the housing 210 on the first symmetry plane A1 can have an arc-shaped outer contour. Since the sound outlet hole 240 is opened on the housing 210 of the sound generating part 21, the outer end face of the sound outlet hole 240 is an arc-shaped structure. Based on this, it can be known that the projection of the outer end face of the sound outlet hole 240 on the first symmetry plane A1 can form an arc segment. Further, when the outer end face of the sound outlet hole 240 is symmetric about the first symmetry plane A1, at least a part of the arc segment of the sound outlet hole 240 overlaps with the arc-shaped outer contour of the housing 210.

[0066] By designing the sound outlet hole 240 as a long strip, and the long side of the long strip forms an arc segment with a certain arc length in the projection on the first symmetry plane A1, the earclip-type earphone 200 can be adapted to people with different ear sizes and ear shapes. Specifically, as shown in combination with Figure 1 、 Figure 3 and Figure 5 , when the sound generating part 21 is inserted into the concha 102 with different depths or sizes, different regions on the sound generating part 21 may be blocked by the inner wall of the concha 102 to different degrees, or the region on the housing 210 of the sound generating part 21 facing the ear canal will have a sound change. The long-strip sound outlet hole 240 symmetric about the first symmetry plane A1 can ensure that in most scenarios, there is always a certain area of the sound outlet hole 240 that can face the ear canal, thereby improving the sound quality of the earphone. In addition, by setting at least a part of the arc-shaped outer contour of the housing 210 to overlap with the arc segment of the sound outlet hole 240, it can be ensured that the outer end face of the sound outlet hole 240 is symmetric about the first symmetry plane A1, so that in the wearing state, a part of the area of the sound outlet hole 240 can be blocked by the concha wall, making the sound field of the sound derived from the sound outlet hole 240 a reflection field, forming emission enhancement, thereby increasing the volume heard by the wearer.

[0067] Figure 7A is a schematic diagram of the position of the sound outlet hole shown in some embodiments of this specification. Figure 7B is a schematic diagram of the wearing state of the earclip-type earphone shown in some embodiments of this specification. Figure 8It is a schematic diagram of the wearing state at different β angles shown in some embodiments of this specification. In some embodiments, in combination with Figures 3 - 8 As shown, by changing the position of the sound outlet hole 240 in the sound generating part 21, the output volume of the earclip-type earphone 200 at the wearer's ear canal can be adjusted. Generally, the larger the output volume of the earclip-type earphone 200 towards the ear canal, the louder the sound that the wearer can experience at the same output power. In this way, the energy consumption of the earclip-type earphone 200 can be reduced and sound leakage can be decreased.

[0068] In some embodiments, in combination with Figures 2 - 5 , Figure 7A , Figure 7B and Figure 8 As shown, in order to change the position of the sound outlet hole 240 in the sound generating part 21, the positions of the first diaphragm 221 and the second diaphragm 231 need to be adjusted. For example, the first diaphragm 221 and the second diaphragm 231 are adjusted to be symmetric with respect to the second symmetry plane A2. Among them, an included angle less than 45 degrees is formed between the first symmetry plane A1 and the second symmetry plane A2. At this time, if the central axis of the sound outlet hole 240 coincides with the central axis of the first sound transmission channel 212, the central axis of the sound outlet hole 240 also forms an included angle less than 45 degrees with the first symmetry plane A1, that is, the sound outlet hole 240 is offset relative to the first symmetry plane A1. In this design method, even if the ear hook 27 tilts relative to the auricle during wearing due to gravity (that is, as Figure 7B As shown, the middle area of the ear hook 27 slides down towards the bottom end of the auricle relative to the sound generating part 21), the sound outlet hole 240 can still face the ear canal.

[0069] In other embodiments, in combination with Figures 2 - 5 , Figure 7A , Figure 7B and Figure 8 As shown, the sound outlet hole 240 is symmetric with respect to a third symmetry plane (not shown in the figure). The third symmetry plane is perpendicular to the contact area between the sound outlet hole 240 and the inner wall of the concha 102. An included angle less than 45 degrees is formed between the first symmetry plane A1 and the third symmetry plane. The contact area refers to the contact part between the outer end face of the sound outlet hole 240 and the inner wall of the concha 102. This embodiment describes the offset of the sound outlet hole 240 from another angle, aiming to illustrate that even if the ear hook 27 tilts relative to the auricle during wearing due to gravity (that is, as Figure 7B As shown, the middle area of the ear hook 27 slides down towards the bottom end of the auricle relative to the sound generating part 21), the sound outlet hole 240 can still face the ear canal.

[0070] In some embodiments, in combination with Figure 1 , Figures 3 - 8As shown, the sound outlet hole 240 can be strip-shaped, and the length direction of the sound outlet hole 240 is parallel to the first symmetry plane A1. Define the angle between the normal line of the sound outlet hole 240 pointing from the sound generating part 21 to the outside (i.e., the central axis of the sound outlet hole 240) and the symmetry plane of the earhook length direction (i.e., the first symmetry plane A1) as α, and the angle between the first symmetry plane A1 and the human body horizontal plane as β. The human body horizontal plane refers to the plane that is parallel to the ground and cuts through the upright human body. Among them, Figure 8 The angles between the first symmetry plane A1 and the human body horizontal plane in three placement cases of the earphone are respectively shown, β1 = -20°, β2 = 0°, β3 = 45°. When α = 0°, the first symmetry plane A1 passes through the central axis of the sound outlet hole 240. When β = 0°, the first symmetry plane A1 is parallel to the human body horizontal plane. At this time, if α is within the range of 15° - 45°, the sound pressure level SPL of the frequency response curve of the earclip-type earphone 200 is the highest, that is, the output volume is the largest. When the earclip-type earphone 200 is worn, affected by gravity, β is usually between 0° and 30°. Therefore, when β = 0° (i.e., the first symmetry plane A1 is parallel to the human body horizontal plane), the angle α between the normal line of the sound outlet hole 240 and the first symmetry plane A1 is set to 15° - 45°, which can increase the listening volume in the wearing scenario where β is between 0° and 30°.

[0071] In some embodiments, when the wearer wears the earclip-type earphone 200, the sound outlet hole 240 can be completely located on the side of the first symmetry plane A1 closer to the wearer's earlobe, so as to further ensure that even when the earclip-type earphone 200 tilts due to factors such as gravity during wearing, the sound outlet hole 240 of the earclip-type earphone 200 can face the ear canal, thereby ensuring the listening effect and listening volume.

[0072] It should be noted that Figures 3 - 8 and its embodiments are only used to illustrate one exemplary structure of the sound generating part 21, and are not intended to limit the specific structure of the sound generating part 21. After understanding the basic principle of the sound generating part 21, the structure of the sound generating part 21 can be adjusted according to the actual situation. Figures 9 - 11 The arrangements of two sound generating parts in the housing are respectively shown exemplarily. In some embodiments, as Figures 9 - 10 shown, the first diaphragm 221 and the second diaphragm 231 of the sound generating part 21 can be symmetric with respect to the fourth symmetry plane A4, and the fourth symmetry plane A4 is perpendicular to the first symmetry plane A1. In some embodiments, in order to change the position of the sound outlet hole 240 in the sound generating part 21, the positions of the first diaphragm 221 and the second diaphragm 231 need to be adjusted. For example, as Figure 11As shown, the first diaphragm 221 and the second diaphragm 231 are adjusted to be symmetrical with respect to the fifth symmetry plane A5, wherein an inclination angle less than 45 degrees is formed between the fifth symmetry plane A5 and the fourth symmetry plane A4, and the fifth symmetry plane A5 is perpendicular to the first symmetry plane A1. In some embodiments, when the first diaphragm 221 and the second diaphragm 231 are symmetrical with respect to the fourth symmetry plane A4 or the fifth symmetry plane A5, the central axis of the sound outlet 240 can coincide with the central axis of the first sound transmission channel 212, and the cross-sectional shape of the sound outlet 240 in the direction perpendicular to its own central axis is the same as the cross-sectional shape of the first sound transmission channel 212 in the direction perpendicular to its own central axis, and the entrance of the sound outlet 240 is aligned with the opening of the first sound transmission channel 212. In other embodiments, in order to ensure that the sound outlet 240 can point to the ear canal when the earclip-type earphone 200 is tilted under the action of gravity, when the wearer wears the earclip-type earphone 200, the sound outlet 240 can be completely located on the side of the first symmetry plane A1 closer to the wearer's earlobe.

[0073] Figure 12 is a schematic cross-sectional view of two sound drivers in a plane including the axial and radial directions of the first magnetic shield according to some embodiments of the present specification. Figure 13 is a top view of the connection of the first sound driver, the second sound driver and the mounting bracket according to some embodiments of the present specification. Combining Figures 3 - 4 and Figures 12 - 13 As shown, the first sound driver 220 includes a first magnet 222, a first magnetic shield 223, and a first chassis 224 for supporting the first diaphragm 221, the first magnet 222, and the first magnetic shield 223, which are arranged in sequence away from the first diaphragm 221. The first chassis 224 includes a plurality of first ventilation holes 2241. The second sound driver 230 includes a second magnet 232, a second magnetic shield 233, and a second chassis 234 for supporting the second diaphragm 231, the second magnet 232, and the second magnetic shield 233, which are arranged in sequence away from the second diaphragm 231. The second chassis 234 includes a plurality of second ventilation holes (not shown in the figure).

[0074] The first magnetic shield 223 has an open end and a closed end, and the open end of the first magnetic shield 223 is arranged facing the first diaphragm 221. The first magnet 222 is located inside the first magnetic shield 223, and one end of the first magnet 222 facing away from the first diaphragm 221 is connected to the inner wall of the closed end of the first magnetic shield 223. The first chassis 224 surrounds the first diaphragm 221, and a first mounting hole is formed at one end of the first chassis 224 facing away from the first diaphragm 221. The first magnetic shield 223 passes through the first mounting hole, and the outer side wall of the first magnetic shield 223 is connected to the hole wall of the first mounting hole. The first chassis 224, the first magnetic shield 223 and the first diaphragm 221 together form a cavity as the rear cavity of the first sound driver 220. Similarly, the second magnetic shield 233 has an open end and a closed end. The open end of the second magnetic shield 233 is arranged facing the second diaphragm 231. The second magnet 232 is located inside the second magnetic shield 233, and one end of the second magnet 232 facing away from the second diaphragm 231 is connected to the inner wall of the closed end of the second magnetic shield 233. The second chassis 234 surrounds the second diaphragm 231, and a second mounting hole is formed at one end of the second chassis 234 facing away from the second diaphragm 231. The second magnetic shield 233 passes through the second mounting hole, and the outer side wall of the second magnetic shield 233 is connected to the hole wall of the second mounting hole. The second chassis 234, the second magnetic shield 233 and the second diaphragm 231 together form a cavity as the rear cavity of the second sound driver 230.

[0075] Magnets (including the first magnet 222 and the second magnet 232) can be used to generate a magnetic field. When the magnetic field intensity generated by the magnet changes, it will cause the corresponding diaphragm to be stressed and change, so that the corresponding diaphragm vibrates. When the diaphragm vibrates, it will drive the air in the first sound transmission channel 212 to vibrate, thus generating sound waves. The magnetic shield can be used to suppress the magnetic leakage of the magnetic circuit components of the sound driver. The chassis is mainly used to support and fix the magnetic circuit components of the sound driver.

[0076] In some embodiments, the materials for making the first magnetic shield 223 and the second magnetic shield 233 may include one or a combination of low-carbon steel, silicon steel sheet, silicon steel sheet, ferrite, etc. In some embodiments, the first magnet 222, the first magnetic shield 223, the first chassis 224 may be the same or similar to the second magnet 232, the second magnetic shield 233, the second chassis 234.

[0077] In some embodiments, the first chassis 224 and the first magnetic shield 223 can be connected by bonding, snap connection, welding, riveting, etc. For example, in Figure 12 the illustrated embodiment, the connection between the first chassis 224 and the first magnetic shield 223 can be fixedly connected by sealant. The second chassis 234 and the second magnetic shield 233 can also be connected by the same or similar connection methods as in the foregoing embodiments.

[0078] It should be noted that the ventilation holes are not limited to being provided on the basin frame. By way of example only, a plurality of first ventilation holes 2241 may be provided on the side wall of the first magnetic guide cover 223, and the plurality of first ventilation holes 2241 may be arranged around the side wall of the first magnetic guide cover 223. A plurality of second ventilation holes may be provided on the side wall of the second magnetic guide cover 233, and the plurality of second ventilation holes may be arranged around the side wall of the second magnetic guide cover 233. In another example, a plurality of first ventilation holes 2241 may be provided at the closed end of the first magnetic guide cover 223, and the plurality of first ventilation holes 2241 may be arranged along the edge of the closed end of the first magnetic guide cover 223. A plurality of second ventilation holes may be provided at the closed end of the second magnetic guide cover 233, and the plurality of second ventilation holes may be arranged along the edge of the closed end of the second magnetic guide cover 233.

[0079] In some embodiments, the first sound driver 220 further includes a first magnetic guide plate 225 disposed within the first basin frame 224. The first magnetic guide plate 225 is connected to the side of the first magnet 222 close to the first diaphragm 221, and is used to adjust the distribution of the magnetic field generated by the first magnet 222. Similarly, the second sound driver 230 further includes a second magnetic guide plate 235 disposed within the second basin frame 234. The second magnetic guide plate 235 is connected to the side of the second magnet 232 close to the second diaphragm 231, and is used to adjust the distribution of the magnetic field generated by the second magnet 232. In some embodiments, the first magnetic guide plate 225 and the second magnetic guide plate 235 may be the same or similar.

[0080] In some embodiments, the first sound driver 220 further includes a first coil 226 disposed within the first basin frame 224. The first coil 226 is arranged around the side wall of the first magnet 222, and one end of the first coil 226 is connected to the first diaphragm 221. When current is applied to the first coil 226 (for example, the first coil 226 is connected to the first pad 2242 on the first basin frame 224, and current is applied to the first coil 226 through the first pad 2242), the first coil 226 can vibrate under the action of the magnetic field and drive the first diaphragm 221 to vibrate. Similarly, the second sound driver 230 further includes a second coil 236 disposed within the second basin frame 234. The second coil 236 is arranged around the side wall of the second magnet 232, and one end of the second coil 236 is connected to the second diaphragm 231. When current is applied to the second coil 236 (for example, the second coil 236 is connected to a second pad (not shown in the figure) on the second basin frame 234, and current is applied to the second coil 236 through the second pad), the second coil 236 can vibrate under the action of the magnetic field and drive the second diaphragm 231 to vibrate. In some embodiments, the first coil 226 and the second coil 236 may be the same or similar.

[0081] In some embodiments, in combination with Figure 5 and Figure 12As shown, the first speaker frame 224 is the same as the second speaker frame 234 and is symmetric with respect to the first symmetry plane A1. The first magnetic shield 223 is the same as the second magnetic shield 233 and is symmetric with respect to the first symmetry plane A1. The first coil 226 is the same as the second coil 236 and is symmetric with respect to the first symmetry plane A1. The two speaker frames, magnetic shields, and coils of the sound generating part 21 are the same and symmetric, which can effectively improve the reusability of each component of the sound generating part 21, simplify the types of materials required for manufacturing the sound generating part 21, and reduce the cost and production difficulty. In some embodiments, the first magnetic plate 225 is the same as the second magnetic plate 235 and is symmetric with respect to the first symmetry plane A1, and the first magnet 222 is the same as the second magnet 232 and is symmetric with respect to the first symmetry plane A1, thereby further improving the reusability of each component of the sound generating part 21, further simplifying the types of materials required for manufacturing the sound generating part 21, and further reducing the cost and production difficulty.

[0082] In some embodiments, such as Figure 12 As shown, the sound generating part 21 further includes a mounting bracket 250, and the first sound driver 220 and the second sound driver 230 are jointly mounted on the mounting bracket 250. For example, the first speaker frame 224 is connected to the mounting bracket 250. The first magnetic plate 225, the first magnet 222, the first magnetic shield 223, and the first diaphragm 221 of the first sound driver 220 are all connected to the mounting bracket 250 through the first speaker frame 224, that is, the first sound driver 220 is mounted on the mounting bracket 250 through the first speaker frame 224. Similarly, the second speaker frame 234 is connected to the mounting bracket 250. The second magnetic plate 235, the second magnet 232, the second magnetic shield 233, and the second diaphragm 231 of the second sound driver 230 are all connected to the mounting bracket 250 through the second speaker frame 234, that is, the second sound driver 230 is mounted on the mounting bracket 250 through the second speaker frame 234.

[0083] In some cases, since both the first sound driver 220 and the second sound driver 230 are mounted on the same mounting bracket 250. For example, the mounting bracket 250 is mainly located between the first acoustic driver and the second acoustic driver, and some structures on the mounting bracket 250 can jointly enclose with the first acoustic driver and the second acoustic driver to form a first transmission channel cavity (i.e., the first sound transmission channel 212). In this way, the overall structure of the sound generating part 21 can be simplified, and the manufacturing cost of the sound generating part 21 can be reduced. Moreover, only by designing the mounting bracket 250 can the common cavity of the first sound driver 220 and the second sound driver 230 be adjusted, avoiding the influence of the complex structure in the housing 210 on the acoustic effect of the common cavity.

[0084] In some embodiments, sealant may be filled between the first basin frame 224 and the second basin frame 234 and the mounting bracket 250 to ensure a tight connection between the mounting bracket 250, the first basin frame 224, and the second basin frame 234. The sealant can provide a certain elastic buffer space when the overall structure composed of the first sound driver 220, the second sound driver 230, and the mounting bracket 250 is assembled with the first rigid housing 214, reducing the collision and extrusion between components.

[0085] In some embodiments, in combination Figures 1 - 2 with Figure 12 as shown, when the external shape of the housing 210 is a shape adapted to the concha cavity, such as a spindle, a sphere, a spheroid, etc., the overall structure composed of the first sound driver 220, the second sound driver 230, and the mounting bracket 250 can be designed to be more adaptable to the shape of the accommodation cavity 211 of the housing 210. Thus, while ensuring the wearing comfort of the earclip-type earphone 200, the utilization efficiency of the accommodation cavity 211 can be improved, and further the sound generation efficiency of the sound generation part 21 can be improved.

[0086] In some embodiments, in combination Figure 3 with Figure 12 as shown, the maximum distance in the axial direction of the structure composed of the first sound driver 220, the second sound driver 230, and the mounting bracket 250 is the first dimension. The maximum distance in the axial direction of the structure composed of the first sound driver 220, the second sound driver 230, and the mounting bracket 250 refers to the distance between the end face of the first magnetic shield 223 facing away from the first diaphragm 221 and the end face of the second magnetic shield 233 facing away from the second diaphragm 231. This distance can be represented by Figure 12 L1 in Figure 12It is represented by L2 in the figure. In some embodiments, the ratio of the first dimension to the second dimension is in the range of 0.7 to 1.3. In some embodiments, the ratio of the first dimension to the second dimension is in the range of 0.85 to 1.15. In some embodiments, the ratio of the first dimension to the second dimension is in the range of 0.9 to 1.1. In some cases, by reducing the ratio of the first dimension to the second dimension, the overall structure composed of the first sound driver 220, the second sound driver 230 and the mounting bracket 250 can be further adapted to the shape of the accommodation cavity 211.

[0087] In some application scenarios, the overall structure composed of the first sound driver 220, the second sound driver 230 and the mounting bracket 250 does not fit tightly against the inner wall of the housing 210. In particular, there may be a certain gap between the outlet of the first sound transmission channel 212 and the inlet of the sound outlet hole 240 (i.e., the end face of the sound outlet hole 240 close to the accommodation cavity 211). When the sound enters the sound outlet hole 240 from the first sound transmission channel 212, it may enter other sound transmission channels in the accommodation cavity 211 through the gap, for example, the rear cavity of the sound driver, which may cause the corresponding diaphragm to fail to form an effective vibration and reduce the sound quality output from the sound outlet hole 240. In this embodiment, a protrusion 251 is provided at the position of the mounting bracket 250 corresponding to the sound outlet hole 240. The protrusion 251 can abut against the inner wall of the housing 210 to isolate the first sound transmission channel 212 from other acoustic channels in the accommodation cavity 211, effectively preventing the air flow in the first sound transmission channel 212 from leaking and ensuring the sound quality output from the sound outlet hole 240.

[0088] As Figure 12 shown, the mounting bracket 250 is a ring structure. Along the axial direction of the mounting bracket 250, the first diaphragm 221 and the second diaphragm 231 are respectively arranged on both sides of the mounting bracket 250 to form the first sound transmission channel 212 with the mounting bracket 250. The mounting bracket 250 can serve as the side wall of the first sound transmission channel 212. In addition, the first basket 224 and the second basket 234 are also respectively arranged on both sides of the mounting bracket 250, and are respectively used to form the rear cavities of the first sound driver 220 and the second sound driver 230. A protrusion 251 is provided at the position of the mounting bracket 250 corresponding to the sound outlet hole 240 (i.e., the side of the mounting bracket 250 close to the sound outlet hole 240). The protrusion 251 protrudes from between the first basket 224 and the second basket 234 and abuts against the inner wall of the housing 210 to isolate the first sound transmission channel 212 from other acoustic channels in the accommodation cavity 211 (for example, the rear cavity of the sound driver).

[0089] Figure 14 It is a front view when the first sound driver, the second sound driver and the mounting bracket are connected according to some embodiments of this specification. Figure 15It is a schematic structural diagram when the first sound driver, the second sound driver and the mounting bracket are connected as shown in some other embodiments of this specification. Combining Figures 12 - 14 As shown, a plurality of through holes 2511 are provided in the protrusion 251 of the mounting bracket 250. Reinforcing ribs 2512 are provided between adjacent through holes 2511. The first cross-section of the through hole 2511 is flush with the end face of the first chassis 224. The second cross-section of the through hole 2511 is flush with the end face of the second chassis 234. The first cross-section of the through hole 2511 refers to the inner wall surface of the through hole 2511 close to the first chassis 224. The second cross-section of the through hole 2511 refers to the inner wall surface of the through hole 2511 close to the first chassis 224. The end face of the first chassis 224 refers to the end face of the first chassis 224 close to the second chassis 234. The end face of the second chassis 234 refers to the end face of the second chassis 234 close to the first chassis 224.

[0090] For the convenience of description, the overall structure composed of the first sound driver 220, the second sound driver 230 and the mounting bracket 250 can be referred to as the first overall structure. If the first sound driver 220 and the second sound driver 230 are symmetrically arranged, for example, symmetric with respect to the first symmetry plane (for example, Figure 3 the first symmetry plane A1 in), then after the first sound driver 220 is flipped 180 degrees relative to the first symmetry plane, the end face of the first chassis 224 of the first sound driver 220 can be flush with the second cross-section of the through hole 2511. At this time, the overall structure (which can be referred to as the second overall structure) composed of the two first sound drivers 220 and the mounting bracket 250 has not changed compared with the first overall structure. Therefore, in the second overall structure, the first sound driver 220 is equivalent to being reused as the second sound driver 230. Similarly, after the second sound driver 230 is flipped 180 degrees relative to the first symmetry plane, the end face of the second chassis 234 of the second sound driver 230 can be flush with the first cross-section of the through hole 2511. At this time, the overall structure (which can be referred to as the third overall structure) composed of the two second sound drivers 230 and the mounting bracket 250 has also not changed compared with the first overall structure. Therefore, in the third overall structure, the second sound driver 230 is equivalent to being reused as the first sound driver 220. After such a setting, it is not necessary to separately manufacture the first sound driver 220 and the second sound driver 230. The first sound driver 220 and the second sound driver 230 can be reused with each other, effectively reducing the manufacturing cost.

[0091] In addition, in this embodiment, due to the presence of the reinforcing rib 2512, the structural strength of the protrusion 251 can be effectively improved, preventing the mounting bracket 250 from being squeezed and deformed. In some embodiments, the reinforcing rib 2512 is not an essential structure of the protrusion 251. The purpose of setting the protrusion 251 is to isolate the first sound transmission channel 212 and the accommodating cavity (for example, Figure 3other acoustic channels of the accommodation cavity 211) (e.g., the rear cavity of the sound driver), so as long as it can be ensured that the first sound transmission channel 212 and the sound outlet hole 240 are acoustically connected, and the first sound transmission channel 212 and other acoustic channels of the accommodation cavity are isolated. For example, in Figure 15 In the illustrated embodiment, the protrusion 251 may be an open structure, and the side wall of the open structure abuts against the inner wall of the housing (e.g., Figure 3 the housing 210 in

[0092] Figure 16 is an assembly schematic diagram of a first sound driver, a second sound driver, and a mounting bracket according to some embodiments of this specification. Combining Figures 14 - 16 As shown, the mounting bracket 250 may include the protrusion 251 in the foregoing embodiment and an annular notch portion 252 connected to the protrusion 251, and there is only one positioning structure on the annular notch portion 252. The positioning structure is configured to position the relative positions of the first chassis 224 and the second chassis 234 and the mounting bracket 250, and the positioning structure is a combination of a positioning protrusion 253 and a positioning groove 254. Only by way of example, the annular notch portion 252 may include a main body portion 2521, a first connecting portion 2522, and a second connecting portion 2523. The first connecting portion 2522 is used to connect the main body portion 2521 and the first chassis 224, and the second connecting portion 2523 is used to connect the main body portion 2521 and the second chassis 234. Two positioning protrusions 253 are provided on the main body portion 2521, and the two positioning protrusions 253 are arranged on both sides of the main body portion 2521 along the axial direction of the annular notch portion 252 (as shown by the arrow in Figure 16 ), and the first connecting portion 2522 and the second connecting portion 2523 are both provided with positioning grooves 254 adapted to the positioning protrusions 253. When the two positioning protrusions 253 are respectively inserted into the two positioning grooves 254, the first chassis 224 and the second chassis 234 and the mounting bracket 250 can be aligned so that the positions of the first pad 2242 and the second pad 2342 correspond to each other, facilitating the external connection of wires to the pads and the connection of the pads to the coils. In some other embodiments, the installation of the first chassis 224 and the second chassis 234 and the mounting bracket 250 can be positioned by other means. For example, a magnetic adsorption structure, a snap-fit slot structure, etc.

[0093] In some embodiments, combining Figure 3 、 Figures 12 - 13As shown, a second sound transmission channel 213 is formed between the first basin stand 224 and the second basin stand 234. One side of the first diaphragm 221 away from the first sound transmission channel 212 communicates with the second sound transmission channel 213 through the first ventilation hole 2241. One side of the second diaphragm 231 away from the first sound transmission channel 212 communicates with the second sound transmission channel 213 through the second ventilation hole. Only as an example, there are gaps between the end face of the first basin stand 224 facing away from the first diaphragm 221 and the inner wall of the housing 210, and between the end face of the second basin stand 234 facing away from the second diaphragm 231 and the inner wall of the housing 210. Therefore, a second sound transmission channel 213 can be formed among the first basin stand 224, the second basin stand 234, and the housing 210, and the cavities near the end face of the first basin stand 224 facing away from the first diaphragm 221 and the cavities near the end face of the second basin stand 234 facing away from the second diaphragm 231 can be acoustically connected. A rear cavity of the first sound driver 220 is formed among the first diaphragm 221, the first basin stand 224, and the first magnetic shield 223. A rear cavity of the second sound driver 230 is formed among the second diaphragm 231, the second basin stand 234, and the second magnetic shield 233. The rear cavity of the first sound driver 220 and the rear cavity of the second sound driver 230 can be acoustically connected to the second sound transmission channel 213 through the first ventilation hole 2241 and the second ventilation hole respectively. At this time, the rear cavity of the first sound driver 220, the rear cavity of the second sound driver 230, and the second sound transmission channel 213 can jointly form a cavity as the rear cavity of the sound generating part 21, which is equivalent to the shared rear cavity of the first sound driver 220 and the second sound driver 230.

[0094] In some cases, the rear cavities of the first sound driver 220 and the second sound driver 230 are acoustically connected, and the air flow in the rear cavities of the two sound drivers can be led out of the housing 210 through the same pressure relief hole (for example, Figure 18 the pressure relief hole 217 in

[0095] Figure 17 is a schematic cross-sectional view of another sound generating part in the axial and radial planes according to some embodiments of this specification. Different from the Figure 12 sound generating part 21 in Figure 17 the sound generating part 31 in

[0096] is that the two sound drivers (the third sound driver 320 and the fourth sound driver 330) of the sound generating part 31 share a rear cavity, and the rear cavities of the third sound driver 320 and the fourth sound driver 330 are acoustically connected to the sound outlet hole 340.

[0097] Figure 18is a schematic structural diagram of an earclip-type earphone shown in some embodiments of this specification. In some embodiments, referring to Figure 18 as shown, the earclip-type earphone 200 may further include a pressure relief hole 217. The pressure relief hole 217 is located on the housing 210 of the sound generating part 21. Combining Figure 1 , Figure 3 , Figure 16 and Figure 18 as shown, when worn, the pressure relief hole 217 is located at the opening of the housing 210 near the earhook 27 and facing the wearer's concha 102. In some embodiments, the pressure relief hole 217 is acoustically communicated with the second sound transmission channel 213, and further acoustically communicated with the rear cavities of the first sound driver 220 and the second sound driver 230, so as to export the sound in the rear cavity to the outside, thereby balancing the sound pressure in the rear cavity, enabling the diaphragm of the sound generating part 21 to vibrate fully under large low-frequency amplitudes, and ensuring the fullness of the low frequency.

[0098] In some embodiments, combining Figure 16 and Figure 18 as shown, the end face of the first chassis 224 facing away from the first diaphragm 221 is provided with a plurality of first ventilation holes 2241, and the plurality of first ventilation holes 2241 are arranged at intervals around the first magnetic conductive cover 223. The end face of the first chassis 224 facing away from the first diaphragm 221 is further provided with a plurality of first pads 2242. The first pads 2242 can be used to energize the first coil 226. The minimum distance between at least part of the first pads 2242 and the pressure relief hole 217 is the first minimum distance, and the minimum distance between at least part of the first ventilation holes 2241 and the pressure relief hole 217 is the second minimum distance, and the first minimum distance is greater than the second minimum distance. The distance between the first pad 2242 and the pressure relief hole 217 refers to the distance between the centroid of the first pad 2242 and the centroid of the pressure relief hole 217. The distance between the first ventilation hole 2241 and the pressure relief hole 217 refers to the distance between the centroid of the first ventilation hole 2241 and the centroid of the pressure relief hole 217.

[0099] Similarly, the end face of the second chassis 234 facing away from the second diaphragm 231 is provided with a plurality of second ventilation holes (not shown in the figure), and the plurality of second ventilation holes are arranged at intervals around the second magnetic conductive cover 233. The end face of the second chassis 234 away from the second diaphragm 231 is further provided with a plurality of second pads (not shown in the figure). The second pads can be used to energize the second coil 236. The minimum distance between at least part of the second pads and the pressure relief hole 217 is the third minimum distance, and the maximum distance between at least part of the second ventilation holes and the pressure relief hole 217 is the fourth minimum distance, and the third minimum distance is greater than the fourth minimum distance.

[0100] In some cases, by making the first vent hole 2241 and the second vent hole closer to the pressure relief hole 217, the airflow in the rear cavities of the first sound driver 220 and the second sound driver 230 can be discharged from the pressure relief hole 217 along a shorter path, improving the pressure release efficiency of the rear cavities of the first sound driver 220 and the second sound driver 230 and enhancing the sound quality.

[0101] In some other embodiments, the average distance from all the first vent holes 2241 to the pressure relief hole 217 is the first average distance, and the average distance from all the first pads 2242 to the pressure relief hole 217 is the second average distance. The first average distance is less than the second average distance. By the above two methods, the vent holes can also be closer to the pressure relief hole 217 than the pads, enabling the airflow in the rear cavity of the sound driver to be discharged from the pressure relief hole 217 along a shorter path and improving the pressure release efficiency of the rear cavity.

[0102] In some embodiments, the first minimum distance can be less than 1.5 mm, and the second minimum distance can be less than 0.8 mm. In some embodiments, the first minimum distance can be less than 1 mm, and the second minimum distance can be less than 0.6 mm. Similarly, in some embodiments, the third minimum distance can be less than 1.5 mm, and the fourth minimum distance can be less than 0.8 mm. In some embodiments, the third minimum distance can be less than 1 mm, and the fourth minimum distance can be less than 0.6 mm.

[0103] In some embodiments, as Figure 18 shown, the pressure relief hole 217 may include a first end 2171, a second end 2172, and a connecting section 2173 connecting the first end 2171 and the second end 2172. The first end 2171, the second end 2172, and the connecting section 2173 are arranged along the length direction of the pressure relief hole 217. The minimum width of the first end 2171 and the second end 2172 is greater than the maximum width of the connecting section 2172, making the shape of the pressure relief hole 217 similar to a "bone shape".

[0104] In some embodiments, in combination with Figure 1 、 Figure 5 and Figure 18 shown. The pressure relief hole 217 may be symmetric with respect to the first symmetry plane A1. After being arranged in this way, whether the earclip-type earphone 200 is worn on the left ear or the right ear of the wearer, it will not have a great impact on the pressure relief effect of the pressure relief hole 217.

[0105] In some embodiments, in combination with Figure 1 、 Figure 3 、 Figure 16 and Figure 18As shown, when worn, the pressure relief hole 217 is farther from the ear canal than the sound outlet hole 240, so as to weaken the anti-phase cancellation between the sound output through the pressure relief hole 217 and the sound output through the sound outlet hole 240 at the position of the ear canal, thereby increasing the volume of the sound heard by the wearer. In some embodiments, when wearing the earclip-type earphone 200, the sound outlet hole 240 faces the ear canal, while the pressure relief hole 217 faces away from the ear canal, and at the same time, the housing 210 of the sound generating part 21 abuts against the inner wall of the concha 102, so as to isolate the sound outlet hole 240 from the pressure relief hole 217, thereby preventing the sound wave derived from the pressure relief hole 217 from interfering with the sound wave derived from the sound outlet hole 240, reducing sound short-circuiting, and improving the sound quality.

[0106] Figure 19 is a schematic cross-sectional view of the sound generating part in a plane parallel to the first symmetry plane according to some embodiments of this specification. In some embodiments, in combination with Figure 5 、 Figure 18 and Figure 19 As shown, on the first symmetry plane A1, an arc-shaped recessed section 271 is formed between the inner side of the ear hook 27 and the housing 210 of the sound generating part 21. The projection of the pressure relief hole 217 on the first symmetry plane A1 is located in the arc-shaped recessed section 271, and the bending degree of the arc-shaped recessed section 271 is greater than a certain threshold, so that the inner contour near the connection position between the housing 21 corresponding to the arc-shaped recessed section 271 and the ear hook 27 has sufficient depression, so that the pressure relief hole 217 provided at this depressed position can be not blocked by the auricle.

[0107] In some embodiments, the pressure relief hole 217 and the sound inlet hole 280 can be arranged on opposite sides of the ear hook 27. For example, when wearing the earclip-type earphone 200, the pressure relief hole 217 can be located on the side of the ear hook facing the antihelix, and the sound inlet hole 280 can be located on the side of the ear hook 27 facing the tragus, so as to improve the sound collection effect of the microphone assembly, and when the pressure relief hole 217 and the sound inlet hole 280 are arranged opposite to each other, the interference between the two can be relatively small.

[0108] Before connecting the first rigid housing 214 and the second rigid housing 215, it may be necessary to first connect and fix the overall structure composed of the two sound drivers and the mounting bracket 250 to the first rigid housing 214. To achieve the connection of this overall structure to the first rigid housing 214, in some embodiments, in combination with Figure 3 and Figure 5As shown, a first stepped structure 218 and a second stepped structure 219 are provided inside the housing 210. The first stepped structure 218 abuts against the first magnetic shield 223 or the first chassis 224. The second stepped structure 219 abuts against the second magnetic shield 233 or the second chassis 234. By way of example only, the first stepped structure 218 and the second stepped structure 219 may be respectively disposed on both sides of a first symmetry plane A1 of the inner wall of the first rigid housing 214, and the first stepped structure 218 and the second stepped structure 219 are symmetric with respect to the first symmetry plane A1. The first stepped structure 218 includes a first abutting portion and a second abutting portion. The first abutting portion abuts against the end face of the first magnetic shield 223 facing away from the first diaphragm 221. The second abutting portion abuts against the outer sidewall of the first magnetic shield 223. The second stepped structure 219 includes a third abutting portion and a fourth abutting portion. The third abutting portion abuts against the end face of the second magnetic shield 233 facing away from the second diaphragm 231. The fourth abutting portion abuts against the outer sidewall of the second magnetic shield 233.

[0109] Through the cooperation of the first abutting portion and the third abutting portion, the overall structure formed by the two sound drivers and the mounting bracket 250 can be restricted from moving axially (parallel to the direction of diaphragm vibration). Through the cooperation of the second abutting portion and the fourth abutting portion, the overall structure formed by the two sound drivers and the mounting bracket 250 can be restricted from moving radially (parallel to the radial direction of the first sound transmission channel 212) towards the earhook 27 side. In addition, by providing the stepped structure to abut against the first magnetic shield 223 and the second magnetic shield 233, it is possible to prevent the stepped structure from blocking the vent holes, thereby improving the pressure relief effect.

[0110] It should be noted that Figure 3 The first stepped structure 218 and the second stepped structure 219 shown are for illustrative purposes only and are not intended to limit the specific form of the structure for positioning the sound driver and the housing 210. For example, the sound driver can be positioned with respect to the housing 210 through structures such as a magnetic attraction component, a snap-fit groove component, a guide groove guide rod component, etc.

[0111] In some solutions, the housings 210 of the earclip-type earphones 200 are all made of hard materials (such as metals) or all made of flexible materials (such as rubbers). However, the housings 210 made of hard materials are lacking in wearing comfort, while the housings 210 made of flexible materials have poor support and protection for the structures accommodated inside the housings 210. Therefore, the functional requirements of the earclip-type earphones 200 cannot be effectively met. To solve the above problems, in some embodiments of this specification, the internal cavity (i.e., the accommodation cavity 211) of the sound-generating part 21 of the earclip-type earphones 200 is enclosed by hard materials, and a flexible body 216 is provided on the surface of the housing 210 that contacts the wearer's concha. This can improve the support and protection for the components accommodated in the housing 210 while ensuring wearing comfort, thereby improving the sound quality of the earclip-type earphones 200.

[0112] In some embodiments, as shown in Figure 3 and Figure 19 the housing 210 may include a first hard housing 214, a second hard housing 215, and a flexible body 216. The second hard housing 215 is configured to face the wearer's concha when worn. The flexible body 216 is configured to contact the wearer's concha when worn. The first hard housing 214 and the second hard housing 215 enclose an accommodation cavity 211. The flexible body 216 covers the outer wall of the second hard housing 215.

[0113] In this embodiment, the accommodation cavity 211 is enclosed by the first hard housing 214 and the second hard housing 215, and both the first hard housing 214 and the second hard housing 215 are made of hard materials. Therefore, the first hard housing 214 and the second hard housing 215 can better support and fix the components in the accommodation cavity 211 (for example, the first sound driver 220, the second sound driver 230), effectively preventing the accommodation cavity 211 from deforming due to external pressure and squeezing the components in the accommodation cavity 211, thereby improving the structural strength of the sound-generating part 21 and the sound quality. In addition, since the flexible body 216 covers the outer wall of the second hard housing 215, when the wearer wears the earphones, the flexible body 216 can contact the wearer's concha, preventing the hard housing from directly contacting the concha and affecting the wearing touch, and effectively improving the wearing comfort. At the same time, since the flexible body 216 mainly covers the outer wall of the second hard housing 215, it basically does not affect the external structure and internal space of the first hard housing 214, and can reduce the overall volume of the housing 210 while ensuring wearing comfort.

[0114] In some embodiments, the materials for manufacturing the first rigid housing 214 and the second rigid housing 215 may include plastics, metals, or other materials that can be used as the supporting materials for the earphone housing 210. In some embodiments, the first rigid housing 214 and the second rigid housing 215 may be made of the same rigid material. In some embodiments, the first rigid housing 214 and the second rigid housing 215 may be made of different rigid materials.

[0115] In some embodiments, the material for manufacturing the flexible body 216 is not limited to silicone, rubber, elastic resin, polyurethane material, polydimethylsiloxane, PVC, TPE, and other materials.

[0116] It should be noted that Figure 3 and Figure 19 the shown housing 210 is only for illustrative purposes and is not intended to limit the setting form of the flexible body 216 in the embodiments of this specification. In some embodiments, except for the connection with the first rigid housing 214, the flexible body 216 is provided on the exposed outer wall of the second rigid housing 215, as shown in combination with Figure 5 and Figure 19 the shown. In some other embodiments, except for the connection with the first rigid housing 214, the flexible body 216 is provided on some areas of the exposed outer wall of the second rigid housing 215. Only as an example, the plane where the outermost loop of the end face of the flexible body 216 is located is the first reference plane A6. In a cross-section perpendicular to the first reference plane A6 and passing through the center of the first reference plane A6 (for example, this cross-section may be a cross-section parallel to the first symmetry plane A1, or this cross-section may be the first symmetry plane A1), the covering area of the flexible body 216 on the second rigid housing 215 is greater than or equal to 80% of the curved length segment of the second rigid housing 215. In another example, the earhook symmetry plane (i.e., the first symmetry plane A1) and the outermost loop of the end face of the flexible body 216 have two intersection points. In a cross-section perpendicular to the earhook symmetry plane A1 and passing through the two intersection points, the covering area of the flexible body 216 on the second rigid housing 215 is greater than or equal to 80% of the curved length segment of the second rigid housing 215. The above two examples respectively describe the proportion of the flexible body 216 on the second rigid housing 215 from two angles, so that the flexible body 216 can cover a large enough area on the second rigid housing 215 to reduce or eliminate the possibility of direct contact between the wearer and the second rigid housing 215.

[0117] In some embodiments, the first rigid housing 214 and the second rigid housing 215 can be connected by means including splicing, welding, snap connection, magnetic attraction connection, etc. Only by way of example, the end of the second rigid housing 215 is spliced and fixed to the end of the first rigid housing 214. The end of the second rigid housing 215 is fixed to the end of the first rigid housing 214 by splicing to form a reliable and small-sized fixed relationship, and this splicing method is also convenient for assembly and reduces the assembly process.

[0118] In Figure 3 and Figure 19 In the illustrated embodiment, since the flexible body 216 is provided on the outer wall of the second rigid housing 215, the wall thickness of this part of the housing 210 is the sum of the wall thickness of the second rigid housing 215 and the wall thickness of the flexible body 216. While the flexible body 216 is not provided on the outer wall of the first rigid housing 214, or the flexible body 216 is only provided on the part of the outer wall of the first rigid housing 214 close to the second rigid housing 215 (such as the part where the first rigid housing 214 is connected to the second rigid housing 215), so the wall thickness of this part of the housing 210 can be regarded as the same as or approximately the same as the wall thickness of the first rigid housing 214. Limited by the small volume of the concha cavity, when the overall size of the housing 210 is limited, since no flexible member is provided on the outer wall of the first rigid housing 214, the overall wall thickness of this part of the housing 210 can be reduced, which is equivalent to increasing the internal space volume of the first rigid housing 214 and can accommodate a diaphragm with a larger area to form a better acoustic effect.

[0119] Furthermore, since the internal space of the first rigid housing 214 is increased, the shape and size of the accommodating cavity 211 change accordingly. In order to make more full use of the internal space of the accommodating cavity 211, it is necessary to adjust the arrangement of the first sound driver 220 and the second sound driver 230. Embodiments of this specification will be combined with Figure 10 and Figure 19 and its embodiments to describe the change situation of the arrangement of the first sound driver 220 and the second sound driver 230.

[0120] In some embodiments, in order to make full use of the internal space of the accommodation cavity 211, the midpoint Q of the line connecting the centers of the first diaphragm 221 and the second diaphragm 231 may approximately coincide with the center of the accommodation cavity 211. The center of the diaphragm refers to the centroid of the plane where the diaphragm is located. Approximately coincide means that the distance between the two does not exceed a preset value, for example, 5 mm, 3 mm, 1 mm, etc. Only as an example, if the shape of the accommodation cavity 211 is spherical and the axial dimension and radial dimension of the overall structure composed of the first sound driver 220, the second sound driver 230, and the mounting bracket 250 are close, when the midpoint Q of the line connecting the centers of the first diaphragm 221 and the second diaphragm 231 coincides with the center of the accommodation cavity 211, the space dimension of the accommodation cavity 211 can be utilized more fully. When the flexible body 216 is not provided, the center of the housing 210 can be regarded as approximately coinciding with the center of the accommodation cavity 211. After the flexible body 216 is provided on the outer wall of the second rigid housing 215, the center position of the entire housing 210 changes, so the midpoint Q of the line connecting the centers of the first diaphragm 221 and the second diaphragm 231 deviates from the center of the entire housing 210. It should be noted that the first diaphragm 221 and the second diaphragm 231 may not be completely the same or completely symmetric with respect to the first symmetry plane A1. For example, the first diaphragm 221 and the second diaphragm 231 may be approximately the same. Another example is that the first diaphragm 221 and the second diaphragm 231 are approximately symmetric with respect to the first symmetry plane A1 (i.e., not completely symmetric).

[0121] In some embodiments, the plane of the outermost loop of the end face of the flexible body 216 is the first reference plane A6, and the midpoint Q of the line connecting the centers of the first diaphragm 221 and the second diaphragm 231 is located outside the first reference plane A6. In this embodiment, the plane of the outermost loop of the end face of the flexible body 216 is equivalent to the interface between the internal space of the flexible body 216 and the internal space of the first rigid housing 214. When the shape and size of the internal space of the flexible body 216 are the same or approximately the same as the shape and size of the internal space of the first rigid housing 214, the midpoint Q of the line connecting the centers of the first diaphragm 221 and the second diaphragm 231 approximately coincides with the center of the accommodation cavity 211 and the center of the housing 210, and the midpoint Q of the line connecting the centers of the first diaphragm 221 and the second diaphragm 231 can be regarded as being located on the first reference plane A6 or having a small distance from the first reference plane A6, so as to make full use of the space of the accommodation cavity 211. Since the second rigid housing 215 is also provided in the flexible body 216, the center of the housing 210 deviates from the center of the accommodation cavity 211, so the midpoint Q of the line connecting the centers of the first diaphragm 221 and the second diaphragm 231 is located outside the first reference plane A6.

[0122] In some embodiments, the plane where the outermost loop line of the end face of the second rigid housing 215 is located is the second reference plane (not shown in the figure), and the midpoint Q of the line connecting the centers of the first diaphragm 221 and the second diaphragm 231 is located outside the second reference plane. The plane where the outermost loop line of the end face of the second rigid housing 215 is located is equivalent to the interface between the internal space of the second rigid housing 215 and the internal space of the first rigid housing 214. When the shape and size of the internal space of the second rigid housing 215 are the same as or approximately the same as the shape and size of the internal space of the first rigid housing 214 and the flexible body 216 is not provided, the midpoint Q of the line connecting the centers of the first diaphragm 221 and the second diaphragm 231 approximately coincides with the center of the accommodating cavity 211 and the center of the housing 210. Therefore, the midpoint Q of the line connecting the centers of the first diaphragm 221 and the second diaphragm 231 can be regarded as being located on the second reference plane or having a small distance from the second reference plane. When the flexible body 216 covers the outer wall of the second rigid housing 215, the central position of the entire housing 210 changes. Therefore, the midpoint Q of the line connecting the centers of the first diaphragm 221 and the second diaphragm 231 deviates from the center of the entire housing 210. Therefore, the midpoint Q of the line connecting the centers of the first diaphragm 221 and the second diaphragm 231 is located outside the second reference plane.

[0123] The above two embodiments respectively take the second rigid housing 215 and the flexible body 216 as references to illustrate the change of the position of the midpoint Q of the line connecting the centers of the first diaphragm 221 and the second diaphragm 231. It shows that the earclip-type earphone 200 provided in some embodiments of this specification can improve the utilization efficiency of the internal space of the housing 210 by reasonably arranging the components in the housing 210 of the sound generating part 21 while ensuring the wearing comfort.

[0124] Combined with Figure 5 and Figure 19 As shown, in some embodiments, the projection of the midpoint of the line connecting the centers of the first diaphragm 221 and the second diaphragm 231 on the first symmetry plane A1 is the first projection point P1, the intersection line of the first reference plane A6 and the first symmetry plane A1 is the first intersection line, and the distance between the first projection point P1 and the first intersection line is in the range of 0.4 mm - 4 mm.

[0125] In some embodiments, the projection of the inner wall of the accommodation cavity 211 on the first symmetry plane A1 is the first projection, and the projection of the first reference plane A6 on the first symmetry plane A1 is the second projection. The first projection and the second projection have a first intersection point P2 and a second intersection point P3, and the distance between the first intersection point P2 and the second intersection point P3 is the intersection distance. The first projection includes a first arc segment R1 and a second arc segment R2, and the ratios of the first arc segment R1 and the second arc segment R2 to the intersection distance are both between 1.4 and 1.7. Since the ratios of the first arc segment R1 and the second arc segment R2 to the intersection distance are both between 1.4 and 1.7, the first arc segment R1 and the second arc segment R2 are both approximately semi-circular, that is, the projection of the accommodation cavity 211 on the first symmetry plane A1 is closer to a sphere, so that the overall shape of the sound generating part 21 is a sphere or approximately a sphere, thereby making the sound generating part 21 more suitable for the concha cavity, and improving the wearing comfort of the ear clip type earphone 200.

[0126] In some embodiments, the sound outlet hole 240 may be located on the first rigid housing 214. In some embodiments, the sound outlet hole 240 may be located on the second rigid housing 215 and the flexible body 216. In some embodiments, the sound outlet hole 240 may be simultaneously located on the first rigid housing 214, the second rigid housing 215 and the flexible body 216.

[0127] For example only, in combination with Figures 2 - 3 As shown, the sound outlet hole 240 is located on the second rigid housing 215 and the flexible body 216. After such setting, on the one hand, the sound outlet hole 240 does not need to penetrate through the first rigid housing 214 and the second rigid housing 215 at the same time, which can avoid the uneven surface of the sound outlet hole 240 and further affect the installation of the housing 210. On the other hand, when wearing the ear clip type earphone 200, the sound outlet hole 240 can be closer to the ear canal, which can effectively improve the sound quality.

[0128] In another example, the sound outlet hole 240 may be located on the first rigid housing 214. In this way, the sound outlet hole 240 does not need to penetrate through the first rigid housing 214 and the second rigid housing 215 at the same time, which can avoid the uneven surface of the sound outlet hole 240 and further affect the installation of the housing 210. In addition, setting the sound outlet hole 240 on the first rigid housing 214 does not require opening a hole on the flexible body 216, nor does it need to consider the influence of the flexible body 216 on the sound outlet hole 240, which can reduce the design and production costs.

[0129] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only an example and does not constitute a limitation to this application. Although not explicitly stated here, those skilled in the art may make various modifications, improvements and corrections to this application. Such modifications, improvements and corrections are proposed in this application, so such modifications, improvements and corrections still belong to the spirit and scope of the exemplary embodiments of this application.

Claims

1. An ear clip type earphone, comprising: The sound-generating part is configured to be inserted into the wearer's concha cavity when worn, and the sound-generating part includes: A housing having a receiving cavity; A first sound driver and a second sound driver are accommodated together in the accommodating cavity, and a first sound transmission channel is formed between a first diaphragm of the first sound driver and a second diaphragm of the second sound driver; a sound outlet hole, located on the housing, the sound outlet hole being acoustically connected to the first sound transmission channel and conducting the sound generated by the first sound driver and the second sound driver; an abutment portion, configured to abut behind the ear of the wearer when worn; The ear hook is configured to bypass the antihelix and the auricle of the wearer when worn, and connect the sound-generating part and the abutting part.

2. The ear-clip headphone according to claim 1, wherein the ear hook has a first symmetry plane, the first diaphragm and the second diaphragm are respectively located on both sides of the first symmetry plane, and the first diaphragm and the second diaphragm are symmetrical with respect to the first symmetry plane.

3. The ear-clip headphone according to claim 1, wherein the ear hook has a first symmetry plane, the first diaphragm and the second diaphragm are symmetrical with respect to the second symmetry plane, and an inclination angle less than 45 degrees is formed between the first symmetry plane and the second symmetry plane.

4. According to the ear clip earphone according to claim 1, the sound outlet is symmetrical with respect to a third symmetry plane, the third symmetry plane is perpendicular to the inner wall of the concha cavity, and an inclination angle less than 45 degrees is formed between the first symmetry plane and the third symmetry plane.

5. The ear clip earphone according to any one of claims 2 to 4, wherein when the wearer wears the ear clip earphone, the sound outlet is completely located on a side of the first symmetry plane that is closer to the wearer's earlobe. 6 . The ear clip headphone according to claim 1 , wherein the first acoustic channel is a common front cavity of the first diaphragm and the second diaphragm.

7. The ear clip headphone according to claim 1, wherein the resonance frequency of the first diaphragm and the resonance frequency of the second diaphragm are both lower than 300 Hz, and the difference between the resonance frequency of the first diaphragm and the resonance frequency of the second diaphragm is less than 50 Hz.

8. The ear-clip headphone according to claim 1, wherein the housing comprises: a first hard shell; A second hard shell is configured to be disposed toward the wearer's concha cavity when worn; a flexible body configured to contact the wearer's concha cavity when worn; The first hard shell and the second hard shell enclose the accommodating cavity, and the flexible body covers the outer wall of the second hard shell.

9. The ear-clip headphone according to claim 8, wherein the plane where the outermost loop line of the end surface of the flexible body lies is a first reference plane, and the midpoint of the line connecting the center of the first diaphragm and the center of the second diaphragm is located outside the first reference plane; or the plane where the outermost loop line of the end surface of the second hard shell lies is a second reference plane, and the midpoint of the line connecting the center of the first diaphragm and the center of the second diaphragm is located outside the second reference plane.

10. According to the ear-clip earphone according to claim 9, the projection of the inner wall of the accommodating cavity on the first symmetry plane is the first projection, the projection of the first reference plane on the first symmetry plane is the second projection, the first projection and the second projection have a first intersection and a second intersection, and the distance between the first intersection and the second intersection is the intersection distance; the first projection includes a first arc segment and a second arc segment, and the ratios of the first arc segment and the second arc segment to the intersection distance are both between 1.4 and 1.7.

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