Earphone

Abstract

The present application discloses an earphone. The earphone comprises a sound production portion; in a worn state, the sound production portion is arranged in a cavum conchae; the sound production portion comprises a first housing, a second housing, and a loudspeaker assembly. The loudspeaker assembly comprises an annular supporting assembly and two vibration assemblies. The two vibration assemblies are each provided with a protruding portion protruding out of the annular supporting assembly in the axial direction, and the protruding portions are arranged opposite to each other. The loudspeaker assembly cooperates with the first housing and the second housing to form two first acoustic cavities at the peripheries of the two protruding portions. The annular supporting assembly has a mid-plane perpendicular to the axial direction, two pressure relief holes are formed in the first housing, and the two pressure relief holes are arranged on two sides of the mid-plane and are each communicated with a corresponding first acoustic cavity and an external environment. By means of the described arrangement, the present application can improve a pressure relief effect, improve the sound output effect of the earphone, and also can enhance the structural strength of the first housing so as to improve the structural strength of the earphone.

Description

earphone [Technical Field]

[0001] This application relates to the technical field of electronic devices, and in particular to headphones. [Background Technology]

[0002] With the increasing prevalence of electronic devices, they have become indispensable social and entertainment tools in people's daily lives, and people's demands for these devices are also rising. Headphones and smart glasses, for example, are widely used in daily life, working in conjunction with mobile phones, computers, and other terminal devices to provide users with an auditory feast. Since the pressure relief effect inside headphones affects their sound output, improving the pressure relief effect is a pressing technical problem that needs to be solved. [Summary of the Invention]

[0003] To solve the above-mentioned technical problems, one technical solution adopted in this application is to provide an earphone, which includes a sound-emitting part, a backing part, and an elastic connecting part connected between the sound-emitting part and the backing part. In the wearing state, the sound-emitting part is disposed in the concha cavity, the backing part abuts against the back side of the auricle, and the elastic connecting part is wrapped around the periphery of the helix. The sound-emitting part includes a first shell, a second shell, and a speaker assembly, and the elastic connecting part is connected to the first end of the first shell.

[0004] The loudspeaker assembly includes an annular support assembly and two sets of vibrating assemblies spaced apart on the annular support assembly along its axial direction.

[0005] The two sets of vibration components each have a protrusion that protrudes from the annular support component along the axial direction and is arranged opposite to each other. The speaker assembly cooperates with the first housing and the second housing to form two first acoustic cavities around the two protrusions. The first housing has two pressure relief holes, which are spaced apart and each corresponds to a first acoustic cavity, and are respectively connected to the corresponding first acoustic cavity and the external environment.

[0006] In some embodiments, the speaker assembly is partially inserted into the first housing from the second end of the first housing in a radial direction perpendicular to the axial direction, the annular support assembly abuts against the inner wall surface of the first housing, the second housing is assembled with the second end of the first housing, and the first end and the second end are disposed opposite to each other;

[0007] The radial dimensions of the two protrusions are smaller than the radial dimensions of the annular support assembly. The annular support assembly has a split surface perpendicular to the axial direction, and two pressure relief holes are spaced apart on both sides of the split surface.

[0008] In some embodiments, the two pressure relief holes are arranged symmetrically with respect to the split surface.

[0009] In some embodiments, the annular support assembly includes a connecting ring and two basin frames. Two sets of vibration components are respectively disposed on the two basin frames. The two basin frames are fixed to both ends of the connecting ring in an axial direction. The connecting ring abuts against the first housing.

[0010] In some embodiments, the shortest interval between the two pressure relief holes along the axial direction is not less than the width of the connecting ring.

[0011] In some embodiments, each set of vibration components includes a diaphragm supported on a corresponding frame, a magnetic circuit assembly, and a voice coil connected to the diaphragm. The magnetic circuit assembly forms a protrusion, and the frame is provided with connecting holes that respectively connect the first acoustic cavity and the opposite sides of the diaphragms of the two sets of vibration components.

[0012] In some embodiments, the shortest distance between the pressure relief hole and the connecting hole is between 0.1 mm and 3 mm.

[0013] In some embodiments, when viewed along the axial direction, the annular support assembly and the inner wall surface of the first housing near the abutment portion form a first abutment area, and two pressure relief holes are located between the first abutment area and the first end.

[0014] In some embodiments, in at least one region between the first abutment region and the first end, the annular support assembly is spaced from the inner wall surface of the first housing so that the two first acoustic cavities are in communication with each other.

[0015] In some embodiments, the annular support assembly forms a second contact area with the inner wall surface of the first housing on the side away from the contact portion, and a second acoustic cavity is further formed between the two sets of vibration components. The second housing is provided with a sound outlet hole that connects the second acoustic cavity with the external environment. The sound outlet hole is located between the first contact area and the second contact area. The annular support assembly surrounds the sound outlet hole and abuts against the second housing to isolate the first acoustic cavity and the second acoustic cavity.

[0016] In some embodiments, when viewed along the axial direction, the shortest distance between the sound outlet and any pressure relief hole is between 8.5 mm and 14 mm.

[0017] In some embodiments, the elastic connection further includes a third housing, which is assembled with the first end of the first housing. The two pressure relief holes are arranged in an elongated shape, and the seam line between the third housing and the first housing is equidistant from the long side of the two pressure relief holes.

[0018] In some embodiments, the headphones include a microphone disposed in a third housing. The third housing has a sound-receiving hole that penetrates the third housing to communicate with the sound acquisition area of ​​the microphone. When viewed along the axial direction, the distance between the sound-receiving hole and any pressure relief hole is greater than 3.5 mm.

[0019] In some embodiments, the inner wall surface of the first housing is provided with two limiting portions extending axially toward the ends of the two protrusions that are opposite to each other. When viewed in the axial direction, the two pressure relief holes are located between the limiting portions and the first end.

[0020] In some embodiments, when the speaker assembly is inserted into the first housing, two abutment regions are formed between the annular support assembly and the inner wall surface of the first housing, spaced apart from each other. When viewed in the axial direction, the spacing direction of the two abutment regions is intersected with the radial direction. The annular support assembly is provided with slots in the two abutment regions respectively, and the inner wall surface of the first housing is provided with blocks in the two abutment regions respectively. The blocks and slots form a plug-in fit as the speaker assembly is inserted into the first housing.

[0021] In some embodiments, the annular support assembly is provided with stop blocks in two abutment areas respectively. The insert block and the stop block form a stop engagement as the speaker assembly is inserted into the first housing to limit the insertion depth of the speaker assembly relative to the first housing.

[0022] In some embodiments, the annular support assembly includes a connecting ring and two basin frames, with two sets of vibration components respectively disposed on the two basin frames. The two basin frames are fixed to both ends of the connecting ring in an axial direction, and slots and stop blocks are disposed on the connecting ring.

[0023] In some embodiments, the inner wall surface of the first housing is provided with two limiting portions extending axially toward the ends of the two protrusions that are opposite to each other, and the two limiting portions abut against the ends of the two protrusions respectively.

[0024] In some embodiments, the inner wall surface of the first housing is provided with grooves in two abutment areas, the insert block is located in the groove, and the annular support assembly is partially located in the groove. In some embodiments, the second housing is provided with a sound outlet, the line connecting the center of the sound-emitting part and the center of the abutment part is the first line, the line connecting the center of the sound outlet and the center of the pressure relief hole is the second line, and the angle between the perpendicular plane of the second line and the first line is less than 30°.

[0025] The beneficial effects of this application are as follows: The sound-generating part of the headphones in this application includes a first housing, a second housing, and a speaker assembly. The speaker assembly has an annular support assembly and two sets of vibration components. The arrangement of two sets of vibration components, compared to a single vibration component, allows the amplitude of the two sets of vibration components to be approximately half that of a single vibration component producing the same output sound, thus reducing the non-linear distortion of the headphones. Furthermore, the synchronous operation of the two sets of vibration components allows for the movement of more air when playing low-frequency signals, resulting in more powerful and full low frequencies, creating a stable sound field, and improving the sound quality of the headphones. Moreover, the speaker assembly, in conjunction with the first and second housings, forms two first acoustic cavities around the two protrusions. Two pressure relief holes on the first housing are respectively connected to the two first acoustic cavities. Thus, the two pressure relief holes on the first housing, corresponding to the two sets of vibration components and the two first acoustic cavities respectively, can connect to the two first acoustic cavities to improve the pressure relief effect of the headphones, thereby improving the sound quality. Moreover, compared to setting a single, longer pressure relief hole to connect the two first acoustic cavities, setting two pressure relief holes can reduce the size of a single pressure relief hole, thereby increasing the structural strength of the first housing and making the first housing more robust, thus improving the structural strength of the headphones. [Attached Image Description]

[0026] Figure 1 is a schematic diagram of the front outline of the user's ear as described in this application;

[0027] Figure 2 is a side-view three-dimensional structural diagram of an embodiment of the earphone provided in this application;

[0028] Figure 3 is a schematic diagram of another side three-dimensional structure of the headphone embodiment shown in Figure 2;

[0029] Figure 4 is an exploded structural diagram of the headphone embodiment shown in Figure 2;

[0030] Figure 5 is a schematic diagram of the cross-sectional structure of the earphone embodiment shown in Figure 3 along section line AA;

[0031] Figure 6 is a schematic diagram of the cross-sectional structure of the sound-emitting part along section line BB in the earphone embodiment shown in Figure 3;

[0032] Figure 7 is a three-dimensional structural schematic diagram of the speaker assembly in the earphone embodiment shown in Figure 4;

[0033] Figure 8 is a three-dimensional structural schematic diagram of the first housing in the earphone embodiment shown in Figure 4;

[0034] Figure 9 is a three-dimensional structural schematic diagram of some components in the earphone embodiment shown in Figure 2;

[0035] Figure 10 is a side view of the three-dimensional structure of the headphone embodiment shown in Figure 2. 【Detailed Implementation Methods】

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0037] The reference to "embodiment" in this application means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0038] The following is an example description of the headphones.

[0039] Referring to Figure 1, the user's ear 1 may include physiological parts such as the external auditory canal 101, the concha 102, and the auricle 103. The external auditory canal 101 has an ear canal opening 1011, which specifically refers to the entrance (i.e., ear hole) in the external auditory canal 101 that is away from the tympanic membrane. Furthermore, the concha 102 has a certain volume and depth, and it is directly connected to the external auditory canal 101; that is, the aforementioned ear hole can be simply considered to be located at the bottom of the concha 102.

[0040] Referring to Figure 2, the headphones 10 are an audio converter capable of receiving electrical signals emitted from a media player or receiver and converting the electrical signals into sound waves that can be heard by the user. In some embodiments, the headphones 10 can be clip-on headphones, ear-hook headphones, or behind-the-ear headphones, etc.

[0041] In some embodiments, as shown in Figures 2 to 10, the earphone 10 may include a sound-emitting part 100, a contact part 200, and an elastic connecting part 300 connected between the sound-emitting part 100 and the contact part 200.

[0042] The sound-emitting part 100 can be a sound playback device, which can be used to convert electrical signals into sound signals (also known as "sound waves" or "sound signals") and transmit them to the wearer's ear 1.

[0043] The elastic connecting part 300 can be a flexible element such as a spring or a spring sheet, which can connect the sound-emitting part 100 and the abutment part 200, allowing the user to wear the earphone 10 on the ear 1 through the elastic connecting part 300. In the wearing state, the sound-emitting part 100 can be disposed in the concha cavity 102, the abutment part 200 abuts against the back side of the auricle 103, and the elastic connecting part 300 can be wrapped around the periphery of the helix.

[0044] As shown in Figures 4 and 5, the sound-emitting part 100 may include a first housing 110, a second housing 120, and a speaker assembly 130. The elastic connecting part 300 is connected to the first end 111 of the first housing 110. The first housing 110 and the second housing 120 can be engaged with each other, and the speaker assembly 130 can be disposed within the space formed by the first housing 110 and the second housing 120.

[0045] As shown in Figures 6 and 7, the speaker assembly 130 may include an annular support assembly 131 and two sets of vibrating components 132 spaced apart along the axial direction of the annular support assembly 131. Each vibrating component 132 is a component that converts an electrical signal into a corresponding acoustic signal. The diaphragm in the vibrating component 132 can vibrate under the influence of an electric current to generate sound waves, thereby realizing the sound playback function of the sound-emitting section 100. The annular support assembly 131 can connect and fix the two sets of vibrating components 132.

[0046] By incorporating two sets of vibration components 132 within the headphones 10, a large diaphragm area can be achieved within a relatively small space, enhancing the sound quality of the headphones 10. Furthermore, the synchronized vibration of the two sets of vibration components 132 increases the vibration effect at corresponding positions of the diaphragm, resulting in clearer and louder sound, thus raising the upper limit of the headphone 10's sound output. At the same output volume, the amplitude of the two sets of vibration components 132 is approximately half that of a single set of vibration components 132 at the same output volume. Smaller amplitude results in less non-linear distortion; therefore, at the same output volume, the two sets of vibration components 132 produce less output sound distortion. Simultaneously, the synchronized operation of the two sets of vibration components 132 can drive more air when playing low-frequency signals, making the low frequencies more powerful and full, creating a stable sound field, and further improving the sound quality of the headphones 10.

[0047] In some embodiments, the speaker assembly 130 can be partially inserted into the first housing 110 from the second end 112 in a radial direction perpendicular to the axial direction. The annular support assembly 131 abuts against the inner wall surface of the first housing 110. The second housing 120 is assembled with the second end 112 of the first housing 110, with the first end 111 and the second end 112 disposed opposite to each other. As an example, the axial direction can be the direction shown by arrow C in Figures 5 and 6, and the radial direction from the second end 112 of the first housing 110 toward the interior of the first housing 110 can be the direction shown by arrow D in Figures 4 and 5.

[0048] As shown in Figures 6 and 7, the two sets of vibration components 132 may each have a protrusion 1321 that protrudes from the annular support component 131 along the axial direction C and is arranged opposite to each other. The radial dimension of the two protrusions 1321 is smaller than the radial dimension of the annular support component 131. As an example, the radial dimension of the protrusion 1321 may be shown as length L1 in Figure 6, and the radial dimension of the annular support component 131 may be shown as length L2 in Figure 6.

[0049] In some embodiments, in a radial direction of the speaker assembly 130, the periphery of the annular support assembly 131 extends beyond the periphery of the two protrusions 1321, and the speaker assembly 130 abuts against the inner wall surface of the first housing 110 via the annular support assembly 131.

[0050] In some embodiments, as shown in Figures 5 and 6, the speaker assembly 130 can cooperate with the first housing 110 and the second housing 120 to form two first acoustic cavities 1301 around the two protrusions 1321. The first housing 110 has two pressure relief holes 113, which are spaced apart and each corresponds to one of the first acoustic cavities 1301, and are respectively connected to the corresponding first acoustic cavity 1301 and the external environment.

[0051] Specifically, since the two protrusions 1321 arranged opposite to each other along the axial direction C form two first acoustic cavities 1301, the two first acoustic cavities 1301 are spaced apart along the axial direction A. The two pressure relief holes 113 on the first housing 110 are spaced apart and respectively connected to the corresponding first acoustic cavities 1301, that is, the two pressure relief holes 113 are respectively arranged at the positions of the first housing 110 corresponding to the two first acoustic cavities 1301.

[0052] This design not only facilitates the connection of the two pressure relief holes 113 to the two first acoustic cavities 1301, thereby improving the pressure relief effect, but also allows for greater freedom in the design of the two pressure relief holes 113. Since the design of the pressure relief holes 113 has certain area requirements, and the pressure relief area required for the two sets of vibration components 132 is fixed, the two smaller pressure relief holes 113 are easier to design for waterproofing and dustproofing compared to one large pressure relief hole 113. Furthermore, the smaller pressure relief hole 113 located in the center has higher structural strength than a larger pressure relief hole 113 located at the edge, making the first housing 110 more robust. This also reduces the entry of moisture, dust, and other impurities into the first acoustic cavity 1301, preventing corrosion and damage to the internal components of the first housing 110, thus increasing the reliability and durability of the earphone 10.

[0053] In some embodiments, as shown in Figures 3 to 5, the annular support assembly 131 has a split surface perpendicular to the axial direction A, and two pressure relief holes 113 are spaced apart on both sides of the split surface. As an example, the split surface can be shown as LF in Figure 3, and Figure 5 shows the structure of the earphone 10 in the split surface LF when viewed along the axial direction C.

[0054] By positioning the two pressure relief holes 113 on both sides of the dividing surface LF, the two pressure relief holes 113 do not occupy the space on the first housing 110 corresponding to the dividing surface LF. This allows the annular support assembly 131 to engage with the first housing 110 through the middle position of the two pressure relief holes 113 or to be fitted with other components, thereby improving the space utilization rate inside the first housing 110.

[0055] Furthermore, by placing the two pressure relief holes 113 on both sides of the split surface LF, the two pressure relief holes 113 can extend from the edges of the two sets of vibration components 132 to the center position of the first acoustic cavity 1301 near the vibration components 132. This allows the two pressure relief holes 113 to be closer to the center position of the two sets of vibration components 132, thereby enabling the two pressure relief holes 113 to better relieve pressure in the first acoustic cavity 1301. It also allows the vibration of the vibration components 132 to be more uniform and stable, reducing sound fluctuations and increasing the vibration consistency of the two sets of vibration components 132, thus improving the sound quality of the headphones 10.

[0056] In some embodiments, the two pressure relief holes 113 may be symmetrically arranged with respect to the dividing surface LF. In other words, the two pressure relief holes 113 have the same shape and are arranged symmetrically with respect to the dividing surface LF. The two sets of vibration components 132 may also be symmetrically arranged with respect to the dividing surface LF.

[0057] This configuration ensures that the two pressure relief holes 113 are connected to the corresponding first acoustic cavity 1301 in the same way, thereby making the pressure relief effect of the two pressure relief holes 113 almost the same. This also makes the resonance peaks of the two sets of vibration components 132 almost the same when they produce sound, thereby reducing the fluctuation of the two sets of vibration components 132 and improving the sound output effect of the headphones 10.

[0058] In some embodiments, as shown in FIG6 and FIG7, the annular support assembly 131 may include a connecting ring 1311 and two basin frames 1312. Two sets of vibration assemblies 132 are respectively disposed on the two basin frames 1312. The two basin frames 1312 are fixed to the two ends of the connecting ring 1311 in an assembly manner along the axial direction A. The connecting ring 1311 abuts against the first housing 110.

[0059] Specifically, the two speaker frames 1312 are arranged along the axial direction A to correspond to the two sets of vibrating components 132, with their mid-planes LF facing each other. A connecting ring 1311 is located at the middle position of the two speaker frames 1312 to connect them, thereby combining the two speaker frames 1312 and the two sets of vibrating components 132 to form a speaker assembly 130. The connecting ring 1311 can abut against the first housing 110 in any radial direction perpendicular to the axial direction A, thereby fixing the speaker assembly 130 to the first housing 110.

[0060] The ring support component 131 is designed in this way to facilitate the fabrication and assembly of the speaker component 130, thereby reducing the difficulty of fabricating and assembling the speaker component 130 and thus reducing the difficulty of fabricating the headphone 10.

[0061] In some embodiments, the shortest interval between the two pressure relief holes 113 along the axial direction A is not less than the width of the connecting ring 1311. As an example, the shortest interval between the two pressure relief holes 113 along the axial direction A can be as shown by distance L3 in FIG8, and the width of the connecting ring 1311 along the axial direction A can be as shown by distance L4 in FIG6.

[0062] Since the connecting ring 1311 abuts against the first housing 110 along any radial direction, if the shortest interval between the two pressure relief holes 113 along the axial direction A is less than the width of the connecting ring 1311, the connecting ring 1311 will partially block the pressure relief holes 113 inside the first housing 110, thus affecting the pressure relief effect of the pressure relief holes 113. Moreover, if the housing width at the middle position of the two pressure relief holes 113 is too small, it will result in the structural strength of the first housing 110 being too small. When the connecting ring 1311 abuts against the housing corresponding to the middle position of the two pressure relief holes 113, or when the first housing 110 is subjected to pressure, this part of the housing is prone to breakage.

[0063] Therefore, setting the shortest interval between the two pressure relief holes 113 along the axial direction A to be no less than the width of the connecting ring 1311 can ensure that the connecting ring 1311 does not block the two pressure relief holes 113 inside the first housing 110, thereby improving the pressure relief effect of the two pressure relief holes 113, and can also improve the structural strength of the housing corresponding to the middle position of the two pressure relief holes 113, thereby improving the structural strength of the first housing 110.

[0064] In some embodiments, as shown in FIG6 and FIG7, each set of vibration components 132 may include a diaphragm 1322 supported on a corresponding frame 1312, a magnetic circuit assembly 1323 and a voice coil 1324 connected to the diaphragm 1322. The magnetic circuit assembly 1323 forms a protrusion 1321. The frame 1312 is provided with a connecting hole 1313 that connects the first acoustic cavity 1301 and the diaphragms 1322 of the two sets of vibration components 132 to opposite sides of each other.

[0065] The voice coil 1324 is used to generate vibration by interacting with the magnetic field of the magnetic circuit assembly 1323 when an electric current passes through it, and the vibration drives the diaphragm 1322 to vibrate and generate sound waves. The diaphragm 1322, the magnetic circuit assembly 1323, and the frame 1312 enclose an internal acoustic cavity 1325. The connecting hole 1313 on the frame 1312 can connect the internal acoustic cavity 1325 with the first acoustic cavity 1301 around the protrusion 1321.

[0066] This configuration allows the internal acoustic cavity 1325 to communicate with the external environment of the headphone 10 through the connecting hole 1313 on the frame 1312, the first acoustic cavity 1301, and the pressure relief hole 113. The air in the internal acoustic cavity 1325 can be effectively conducted to the outside, thereby effectively improving the pressure relief effect.

[0067] In some embodiments, as shown in FIG9, the shortest distance between the pressure relief hole 113 and the connecting hole 1313 can be between 0.1mm and 3mm. For example, the shortest distance between the pressure relief hole 113 and the connecting hole 1313 can be values ​​such as 0.1mm, 0.5mm, 0.8mm, 1mm, 1.2mm, 1.6mm, 2mm, 2.5mm, 2.8mm, or 3mm. As an example, the shortest distance between the pressure relief hole 113 and the connecting hole 1313 can be as shown by distance L5 in FIG9.

[0068] If the shortest distance between the pressure relief hole 113 and the connecting hole 1313 is less than 0.1mm, the frame 1312 and the first housing 110 will be too close, and the pressure relief hole 113 will be blocked by the frame 1312, making it difficult to connect to the first acoustic cavity 1301. If the shortest distance between the pressure relief hole 113 and the connecting hole 1313 is greater than 3mm, it means that the distance between the frame 1312 and the first housing 110 is too far. This will increase the volume of the first acoustic cavity 1301 and affect the pressure relief effect of the pressure relief hole 113, and will also increase the size of the headphone 10.

[0069] Therefore, the shortest distance between the pressure relief hole 113 and the connecting hole 1313 is between 0.1mm and 3mm. This not only makes it less likely for the pressure relief hole 113 to be blocked by the frame 1312, but also reduces the volume of the first acoustic cavity 1301, thus reducing the impact on the pressure relief effect of the pressure relief hole 113, and also reduces the size of the headphone 10.

[0070] In some embodiments, as shown in Figures 5 to 8, when viewed along the axial direction A, the annular support assembly 131 and the inner wall surface of the first housing 110 near the abutment portion 200 can form a first abutment area 1314, and two pressure relief holes 113 are located between the first abutment area 1314 and the first end 111.

[0071] Specifically, the sound-emitting part 100 has a side close to the abutment part 200 and a side away from the abutment part 200. Since the sound-emitting part 100 can abut against the concha 102 when the earphone 10 is worn, and the abutment part 200 abuts against the back of the auricle 103, the side of the sound-emitting part 100 close to the abutment part 200 is blocked by the concha 102 when worn. A first abutment area 1314 is formed on the inner wall surface of the first housing 110 close to the abutment part 200. Two pressure relief holes 113 are set between the first abutment area 1314 and the first end 111. This not only makes the two pressure relief holes 113 closer to the ear 1 when the earphone 10 is worn, so that external dust, moisture and other impurities are less likely to enter the pressure relief holes 113 and damage the internal components of the first housing 110, but also improves the aesthetics of the earphone 10. The two pressure relief holes 113 are located between the first abutment area 1314 and the first end 111, which can reduce the impact of the opening of the pressure relief holes 113 on the structural strength of the first housing 110, thereby strengthening the strength of the first housing 110.

[0072] In some embodiments, in at least one region between the first abutment region 1314 and the first end 111, the annular support assembly 131 is spaced from the inner wall surface of the first housing 110, so that the two first acoustic cavities 1301 are in communication with each other. Both first acoustic cavities 1301 are in communication with the pressure relief hole 113 to achieve the pressure relief function. Therefore, setting the two first acoustic cavities 1301 to be in communication with each other can also balance the pressure relief effect of the two first acoustic cavities 1301, thereby improving the pressure relief effect.

[0073] In some embodiments, as shown in Figures 5 and 6, the annular support assembly 131 and the inner wall surface of the first housing 110 on the side opposite to the abutment portion 200 can form a second abutment region 1315. A second acoustic cavity 1326 is further formed between the two sets of vibration assemblies 132. The second housing 120 may be provided with a sound outlet 121 communicating with the second acoustic cavity 1326 and the external environment, and the sound outlet 121 is located between the first abutment region 1314 and the second abutment region 1315. The annular support assembly 131 surrounds the sound outlet 121 and abuts against the second housing 120 to isolate the first acoustic cavity 1301 and the second acoustic cavity 1326.

[0074] Specifically, the sound waves generated by the diaphragms 1322 of the two sets of vibrating components 132 can be transmitted out of the earphone 10 through the second acoustic cavity 1326 and the sound outlet 121. The sound outlet 121 is located between the first contact area 1314 and the second contact area 1315, which reduces the impact of the opening of the sound outlet 121 on the strength of the second housing 120, thereby strengthening the strength of the second housing 120 and making the structure of the earphone 10 more stable.

[0075] In some embodiments, as shown in FIG10, when viewed along the axial direction A, the shortest distance between the sound outlet 121 and any pressure relief hole 113 can be between 8.5mm and 14mm. For example, the shortest distance between any pressure relief hole 113 and the sound outlet 121 can be values ​​such as 8.5mm, 9mm, 9.2mm, 9.5mm, 10mm, 10.5mm, 11mm, 11.5mm, 12mm, 12.5mm, 13mm, or 14mm. As an example, the shortest distance between the sound outlet 121 and any pressure relief hole 113 can be as shown by distance L6 in FIG10.

[0076] If the shortest distance between the sound outlet 121 and any pressure relief hole 113 is less than 8.5 mm, it indicates that the position of the pressure relief hole 113 is too close to the position of the sound outlet 121. Therefore, when the earphone is worn on the user's ear 1, the sound outlet 121 corresponds to the user's ear canal opening 1011, while the pressure relief hole 113 is easily blocked by the ear 1, thus affecting the pressure relief effect of the pressure relief hole 113. If the shortest distance between the sound outlet 121 and any pressure relief hole 113 is greater than 14 mm, it indicates that the pressure relief hole 113 is too close to the edge of the first housing 110. This will affect the strength of the first housing 110, and the distance of the pressure relief hole 113 from the center of the vibration component 132 will also affect the pressure relief effect, thereby reducing the sound quality of the earphone 10.

[0077] Therefore, the shortest distance between the sound outlet 121 and any pressure relief hole 113 is set between 8.5mm and 14mm. This not only makes it less likely for the pressure relief hole 113 to be blocked by the ear 1, but also reduces the impact of the pressure relief hole 113 on the strength of the first housing 110. In addition, it can also improve the pressure relief effect of the pressure relief hole 113, thereby improving the sound quality of the headphones 10.

[0078] In some embodiments, as shown in FIG4, the elastic connection portion 300 may further include a third housing 310, which can be assembled with the first end 111 of the first housing 110. The two pressure relief holes 113 may be elongated, and the seam line between the third housing 310 and the first housing 110 is equidistant from the long side of the two pressure relief holes 113.

[0079] Specifically, observing along the axial direction A, it can be seen that the long sides of the two pressure relief holes 113 are parallel to the seam line between the third housing 310 and the first housing 110. This arrangement of the two pressure relief holes 113 strengthens the connection between the long sides of the two pressure relief holes 113 and the first end 111 of the first housing 110, thereby enhancing the structural strength of the first housing 110. Furthermore, this arrangement allows the two independently positioned pressure relief holes 113 to be closer to the connecting hole 1313 of the rear frame 1312 of the vibrating assembly 132, thus placing the resonant peak of the first acoustic cavity 1301 at a higher frequency. This results in a flatter frequency response across a wider frequency range and less phase fluctuation, which helps reduce sound leakage from the headphones 10.

[0080] Of course, in other embodiments, the pressure relief hole 113 may also be circular, triangular or irregular in shape.

[0081] In some embodiments, as shown in Figures 4 and 5, the earphone 10 may include a microphone 400, which may be disposed in a third housing 310. The third housing 310 has a sound-receiving hole 311 that penetrates the third housing 310 to communicate with the sound acquisition area of ​​the microphone 400. The microphone 400 can acquire external sounds through the sound-receiving hole 311. External sounds may include, for example, user voices, horns, car bells, surrounding voices, or traffic signals.

[0082] As shown in Figure 10, when viewed along the axial direction A, the distance between the microphone 400 and any pressure relief hole 113 is greater than 3.5 mm. For example, when viewed along the axial direction A, the distance between the microphone 400 and any pressure relief hole 113 is 3.8 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 8 mm, or 10 mm. As an example, the shortest distance between the sound outlet 121 and any pressure relief hole 113 can be shown as distance L7 in Figure 10.

[0083] If the distance between the microphone hole 311 and any pressure relief hole 113 is less than 3.5mm, it means that the distance between the microphone hole 311 and any pressure relief hole 113 is small. In this case, the microphone 400 located at the microphone hole 311 is likely to extend from the third housing 310 into the interior of the first housing 110, thereby easily blocking the pressure relief hole 113 and affecting the pressure relief effect of the pressure relief hole 113.

[0084] Therefore, setting the distance between the sound hole 311 and any pressure relief hole 113 to be greater than 3.5mm can make the pressure relief hole 113 less likely to be blocked by the ear 1, thereby improving the pressure relief effect of the pressure relief hole 113 and improving the sound quality of the headphone 10.

[0085] In some embodiments, as shown in Figures 6 and 8, the inner wall surface of the first housing 110 may be provided with two limiting portions 114 extending in the axial direction A toward the ends of the two protrusions 1321 that are opposite to each other. When viewed in the axial direction A, the two pressure relief holes 113 are located between the limiting portions 114 and the first end 111. By providing the two pressure relief holes 113 between the limiting portions 114 and the first end 111, the impact of the opening of the two pressure relief holes 113 on the first housing 110 can be reduced, thereby improving the structural strength of the first housing 110.

[0086] In some embodiments, as shown in FIG6, the two limiting portions 114 abut against the ends of the two protrusions 1321 respectively. Specifically, the two limiting portions 114 may abut against the two protrusions 1321 respectively in the axial direction A, thereby limiting the speaker assembly 130 in the axial direction A, thereby enhancing the structural stability inside the first housing 110 and the structural strength of the first housing 110.

[0087] In some embodiments, as shown in Figures 5 and 8, when the speaker assembly 130 is inserted into the first housing 110, two abutment regions 1316 are formed between the annular support assembly 131 and the inner wall surface of the first housing 110.

[0088] In some embodiments, the two abutting regions 1316 may be a first abutting region 1314 and a second abutting region 1315.

[0089] Viewed along the axial direction A, the spacing direction of the two abutment regions 1316 intersects the radial direction D. In other words, the direction in which the speaker assembly 130 is inserted into the first housing 110 intersects the spacing direction of the two abutment regions 1316. As an example, the spacing direction of the two abutment regions 1316 can be as shown by arrow E in Figures 5 and 6.

[0090] As shown in Figures 5 to 8, the annular support assembly 131 may have slots 1317 in two abutment areas 1316, and the inner wall of the first housing 110 may have inserts 1318 in the two abutment areas 1316. The inserts 1318 and slots 1317 form a plug-in fit as the speaker assembly 130 is inserted into the first housing 110. In other words, as the speaker assembly 130 is inserted into the first housing 110 along the radial direction D, the inserts 1318 on the inner wall of the first housing 110 and the slots 1317 of the annular support assembly 131 can be plugged in, thereby achieving the limiting abutment between the annular support assembly 131 and the first housing 110.

[0091] Since the two pressure relief holes 113 are arranged along the axial direction C of the first housing 110 on both sides of the speaker assembly 130, the two abutment areas 1316 are arranged radially so that the two abutment areas 1316 and the two pressure relief holes 113 do not affect each other. Thus, after adjusting the position of the two pressure relief holes 113, the abutment and fixation between the speaker assembly 130 and the first housing 110 can be further realized, thereby improving the structural stability inside the earphone 10.

[0092] In some embodiments, as shown in FIG5 and FIG7, the annular support assembly 131 is provided with stop blocks 1319 in two abutment areas 1316 respectively. The insert block 1318 and the stop block 1319 form a stop engagement as the speaker assembly 130 is inserted into the first housing 110 to limit the insertion depth of the speaker assembly 130 relative to the first housing 110.

[0093] The stop block 1319 is disposed at one end of the slot 1317. The insert block 1318 and the stop block 1319 can stop each other, so that the speaker assembly 130 is not easy to rotate circumferentially in the plane where the radial direction D is located in the first housing 110. The slot 1317 is used to restrict the movement of the speaker assembly 130 in the axial direction A, so that the speaker assembly 130 can be further fixed in the first housing 110.

[0094] Furthermore, the stop block 1319 and the slot 1317 can cooperate to make the depth of the slot 1317 the insertion depth of the speaker assembly 130 relative to the first housing 110. When the speaker assembly 130 is inserted into the first housing 110, the insert block 1318 is inserted into the slot 1317 to form a mating fit. When the insert block 1318 abuts against the stop block 1319, the assembly process of the speaker assembly 130 and the first housing 110 is completed. This facilitates the insertion of the speaker assembly 130 into the first housing 110, thereby simplifying the assembly process of the headphones 10.

[0095] In some embodiments, as shown in Figures 6 and 7, two sets of vibration components 132 can be respectively disposed on two basin frames 1312, and the two basin frames 1312 can be fixed to both ends of the connecting ring 1311 in an assembly manner along the axial direction C. The slot 1317 and the stop block 1319 are disposed on the connecting ring 1311.

[0096] Specifically, two sets of vibration components 132 are disposed on two frames 1312, and a connecting ring 1311 connects and fixes the two frames 1312 to connect and fix the two sets of vibration components 132. The placement of the slot 1317 and the stop block 1319 on the connecting ring 1311 not only facilitates the fabrication of the slot 1317 and the stop block 1319, simplifying the structure of the speaker assembly 130, but also facilitates the mutual abutment and fixation of the speaker assembly 130 and the first housing 110, thereby simplifying the fixed connection structure between the speaker assembly 130 and the first housing 110.

[0097] In some embodiments, as shown in FIG6, the inner wall surface of the first housing 110 may be provided with grooves 115 in two abutment areas 1316 respectively, the insert block 1318 is located in the groove 115, and the annular support assembly 131 is partially located in the groove 115.

[0098] Specifically, the shape of the groove 115 corresponds to the radially peripheral shape of the annular support assembly 131. During the insertion of the speaker assembly 130 into the first housing 110, the peripheral portion of the annular support assembly 131 engages with the groove 115 to insert into it, and the insert block 1318 is also inserted into the slot 1317. By providing the groove 115, the position of the annular support assembly 131 can be easily positioned during assembly, facilitating the assembly of the speaker assembly 130 with the first housing 110. Furthermore, the first housing 110 can be further secured by the groove 115, thereby improving the structural stability of the headphone 10.

[0099] In some embodiments, as shown in FIG10, the second housing 120 has a sound outlet 121. The line connecting the center of the sound-emitting part 100 and the center of the abutment part 200 is a first line, and the line connecting the center of the sound outlet 121 and the center of the pressure relief hole 113 is a second line. The angle between the perpendicular bisector of the second line and the first line is less than 30°. As an example, the first line can be represented by line segment HI in FIG10, the second line can be represented by line segment JK in FIG10, and the perpendicular bisector of the second line JK can be represented by surface LM in FIG10.

[0100] For example, in some embodiments, the angle between the perpendicular plane LM of the second line JK and the first line HI can be 0°, 10°, 15°, 20° or 25°.

[0101] The second connection JK is perpendicular to the vertical plane LM of the second connection JK, and the vertical plane LM bisects the second connection JK. Specifically, the vertical plane LM is the sound-absorbing surface formed by the sound outlet 121 and the pressure relief hole 113. On this surface, the sound waves from the sound outlet 121 and the pressure relief hole 113 will cancel each other out. Therefore, when the earphone 10 is worn on the ear 1, this vertical plane LM needs to be moved away from the ear canal opening 1011 as soon as possible.

[0102] When worn, since the sound-emitting part 100 can be located within the concha 102 and the abutment part 200 abuts against the back of the auricle 103, the first connecting line HI can be parallel to a thickness direction of the auricle 103 and substantially perpendicular to the direction of the ear canal opening 1011. This thickness direction of the auricle 103 and the direction of the ear canal opening 1011 can be substantially perpendicular. However, due to the different structures of each person's ear 1 and the influence of the wearing method when the earphone 10 is worn on the ear 1, the parallelism of the first connecting line HI to a thickness direction of the auricle 103 means that the spatial angle between the first connecting line HI and the thickness direction of the auricle 103 is less than 10°. The substantially perpendicularity of the first connecting line HI to the direction of the ear canal opening 1011 means that the spatial angle between the first connecting line HI and the direction of the ear canal opening 1011 is within the range of 80°-100°.

[0103] Therefore, it can be concluded that by setting the angle between the perpendicular plane LM of the second connection JK and the first connection to be less than 30°, the perpendicular plane LM of the first connection HI and the orientation direction of the ear canal opening 1011 can have a larger spatial angle, thereby making the perpendicular plane LM further away from the ear canal opening 1011, so as to reduce the influence of the sound-absorbing surfaces of the sound outlet 121 and the pressure relief hole 113 on the sound quality transmitted into the user's ear canal opening 1011, and thus increase the listening effect.

[0104] In summary, the sound-generating part of the headphones in this application includes a first housing 110, a second housing 120, and a speaker assembly 130. The speaker assembly 130 has an annular support assembly 131 and two sets of vibration assemblies 132. Compared to having only one vibration assembly 132, the amplitude of the two sets of vibration assemblies 132 can be approximately half that of a single vibration assembly 132 with the same output sound level, thus reducing the nonlinear distortion of the headphones 10. Moreover, the two sets of vibration assemblies 132 work synchronously, pushing more air when playing low-frequency signals, making the low frequencies more powerful and full, creating a stable sound field, and improving the sound quality of the headphones 10. Furthermore, the speaker assembly 130 cooperates with the first housing 110 and the second housing 120 to form two first acoustic cavities 1301 around the two protrusions 1321. The two pressure relief holes 113 on the first housing 110 are respectively connected to the two first acoustic cavities 1301. Thus, two pressure relief holes 113 are provided on the first housing 110. The two pressure relief holes 113 correspond to the two sets of vibration components 132 and the two first acoustic cavities 1301 respectively. This not only allows the two first acoustic cavities 1301 to be connected to improve the pressure relief effect of the headphones 10, thereby improving the sound quality of the headphones 10, but also, compared to setting a single, longer pressure relief hole 113 to connect the two first acoustic cavities 1301, setting two pressure relief holes 113 can reduce the size of a single pressure relief hole 113, thereby improving the structural strength of the first housing 110 and making the first housing 110 more robust.

[0105] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. An earphone, characterized by comprising: The earphone includes a sound-emitting part, a backing part, and an elastic connecting part connecting the sound-emitting part and the backing part. When worn, the sound-emitting part is disposed in the concha cavity, the backing part abuts against the back side of the auricle, and the elastic connecting part is wrapped around the periphery of the helix. The sound-emitting part includes a first shell, a second shell, and a speaker assembly. The elastic connecting part is connected to the first end of the first shell. The loudspeaker assembly includes an annular support assembly and two sets of vibrating assemblies spaced apart on the annular support assembly along the axial direction of the annular support assembly. The two sets of vibration components each have a protrusion that protrudes from the annular support component along the axial direction and is arranged opposite to each other. The speaker assembly cooperates with the first housing and the second housing to form two first acoustic cavities around the two protrusions. The first housing has two pressure relief holes. The two pressure relief holes are spaced apart and each corresponds to one of the first acoustic cavities, and are respectively connected to the corresponding first acoustic cavity and the external environment.

2. The earphone according to claim 1, characterized in that, The speaker assembly is inserted into the first housing from the second end portion along a radial direction perpendicular to the axial direction. The annular support assembly abuts against the inner wall surface of the first housing. The second housing is assembled with the second end of the first housing, and the first end and the second end are disposed opposite to each other. The radial dimensions of the two protrusions are smaller than the radial dimension of the annular support assembly, the annular support assembly has a mid-plane perpendicular to the axial direction, and the two pressure relief holes are spaced apart on both sides of the mid-plane.

3. The earphone according to claim 2, characterized in that, The two pressure relief holes are symmetrically arranged relative to the dividing surface.

4. The earphone according to claim 1, characterized in that, The annular support assembly includes a connecting ring and two basin frames. The two sets of vibration components are respectively disposed on the two basin frames. The two basin frames are fixed to both ends of the connecting ring in an assembly manner along the axial direction. The connecting ring abuts against the first housing.

5. The earphone according to claim 4, characterized in that, The shortest interval between the two pressure relief holes along the axial direction is not less than the width of the connecting ring.

6. The earphone according to claim 4, characterized in that, Each set of the vibration components includes a diaphragm supported on the corresponding frame, a magnetic circuit assembly, and a voice coil connected to the diaphragm. The magnetic circuit assembly forms the protrusion. The frame is provided with connecting holes that respectively connect the first acoustic cavity and the opposite sides of the diaphragms of the two sets of vibration components.

7. The earphone according to claim 6, characterized in that, The shortest distance between the pressure relief hole and the connecting hole is between 0.1mm and 3mm.

8. The earphone according to claim 1, characterized in that, Viewed along the axial direction, the annular support assembly and the inner wall surface of the first housing near the abutment portion form a first abutment area, and the two pressure relief holes are located between the first abutment area and the first end.

9. The earphone according to claim 8, characterized in that, In at least one region between the first abutment area and the first end, the annular support assembly is spaced from the inner wall surface of the first housing so that the two first acoustic cavities are in communication with each other.

10. The earphone according to claim 8, characterized in that, The annular support assembly forms a second contact area with the inner wall surface of the first housing on the side away from the abutment portion. A second acoustic cavity is further formed between the two sets of vibration assemblies. The second housing is provided with a sound outlet hole that connects the second acoustic cavity with the external environment. The sound outlet hole is located between the first contact area and the second contact area. The annular support assembly surrounds the sound outlet hole and abuts against the second housing to isolate the first acoustic cavity and the second acoustic cavity.

11. The earphone according to claim 10, characterized in that, When viewed along the axial direction, the shortest distance between the sound outlet and any of the pressure relief holes is between 8.5 mm and 14 mm.

12. The earphone according to claim 1, characterized in that, The elastic connection part further includes a third housing, which is assembled with the first end of the first housing. The two pressure relief holes are arranged in an elongated shape, and the seam line between the third housing and the first housing is equidistant from the long side of the two pressure relief holes.

13. The earphone according to claim 12, characterized in that, The earphone includes a microphone, which is disposed in the third housing. The third housing has a sound receiving hole that penetrates the third housing to communicate with the sound acquisition area of ​​the microphone. When viewed along the axial direction, the distance between the sound receiving hole and any of the pressure relief holes is greater than 3.5 mm.

14. The earphone according to claim 1, characterized in that, The inner wall of the first housing is provided with two limiting portions extending toward the ends of the two protrusions that are opposite to each other along the axial direction. When viewed along the axial direction, the two pressure relief holes are located between the limiting portions and the first end.

15. The earphone according to claim 1, characterized in that, The speaker assembly is inserted into the first housing from its second end portion along a radial direction perpendicular to the axial direction. When the speaker assembly is inserted into the first housing, two abutment areas are formed between the annular support assembly and the inner wall surface of the first housing. When viewed along the axial direction, the spacing direction of the two abutment areas intersects the radial direction. The annular support assembly is provided with slots in the two abutment areas respectively, and the inner wall surface of the first housing is provided with inserts in the two abutment areas respectively. The inserts and the slots form a plug-in fit as the speaker assembly is inserted into the first housing.

16. The earphone according to claim 15, characterized in that, The annular support assembly is provided with stop blocks in the two abutment areas respectively. The insert block and the stop block form a stop engagement as the speaker assembly is inserted into the first housing to limit the insertion depth of the speaker assembly relative to the first housing.

17. The earphone according to claim 16, characterized in that, The annular support assembly includes a connecting ring and two basin frames. The two sets of vibration components are respectively disposed on the two basin frames. The two basin frames are fixed to both ends of the connecting ring in an assembled manner along the axial direction. The slot and the stop block are disposed on the connecting ring.

18. The earphone according to claim 17, characterized in that, The inner wall of the first housing is provided with two limiting portions extending along the axial direction toward the ends of the two protrusions that are opposite to each other, and the two limiting portions abut against the ends of the two protrusions respectively.

19. The earphone according to claim 17, characterized in that, The inner wall surface of the first housing is provided with grooves in the two abutment areas respectively, the insert block is located in the groove, and the annular support assembly is partially located in the groove.

20. The earphone according to claim 1, characterized in that, The second housing has a sound outlet. The line connecting the center of the sound-emitting part and the center of the abutment part is the first line, and the line connecting the center of the sound outlet and the center of the pressure relief hole is the second line. The angle between the perpendicular plane of the second line and the first line is less than 30°.

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