Bone conduction earphone

Abstract

The utility model discloses a bone conduction earphone, and relates to the technical field of sound production equipment. The bone conduction earphone comprises an earphone head, a function bin and an ear hook. The function bin comprises a shell, a first microphone and a second microphone, the first microphone and the second microphone are arranged in the shell, the shell comprises a first microphone hole corresponding to the first microphone and a second microphone hole corresponding to the second microphone, the first microphone is a sound receiving microphone and used for receiving sound signals sent by a user, and the second microphone is a noise reduction microphone and used for reducing noise of the user. The first microphone hole is used for receiving an external environment sound signal and is closer to the earphone head than the second microphone hole; the ear hook is connected between the earphone head and the function bin and used for being hooked on the ear of the human body. The first microphone and the second microphone are arranged in the function bin, so that the influence of the earphone head on sound signal receiving of the first microphone and the second microphone is avoided; and on the other hand, a space is reserved for the installation of other components in the earphone head, so that the assembly is convenient.

Description

Technical Field

[0001] The utility model relates to a sound-generating device, in particular to a bone conduction earphone. Background Art

[0002] A microphone is usually provided inside the headset, and the microphone can convert sound signals into electrical signals for transmission so as to conduct normal conversations.

[0003] For example, the Chinese invention patent with publication number CN113965846A discloses a bone conduction sound-generating device, a method for assembling a bone conduction sound-generating device, and a bone conduction earphone, which has two microphones on the earphone head (i.e., its bone conduction sound-generating device), one of which is mainly used to receive the sound (voice) of the user's speech, and the other microphone is mainly used to receive ambient sound (background noise).

[0004] On the one hand, for bone conduction headphones, a vibration device is installed inside the headphone head. The vibration of the vibration device will cause the overall vibration of the headphone head, and the vibration will have an adverse effect on the quality of microphone sound pickup, thereby affecting the accuracy of sound pickup and the quality of communication. On the other hand, as the functions of bone conduction headphones become more and more abundant, the number of parts inside the headphone head has also increased accordingly, and the space inside the headphone head is small. Setting the microphone inside the headphone head will make the structure inside the headphone head more complicated and more difficult to assemble.

[0005] Therefore, it is necessary to improve the prior art to overcome the above defects in the prior art. Utility Model Content

[0006] The purpose of the utility model is to provide a bone conduction earphone, which can facilitate the assembly of the earphone head and is conducive to improving the sound pickup quality.

[0007] In order to achieve the above-mentioned utility model object, the utility model proposes a bone conduction headset, comprising:

[0008] Headphone head;

[0009] A functional compartment, comprising a shell and a first microphone and a second microphone disposed in the shell, the shell comprising a first microphone hole corresponding to the first microphone and a second microphone hole corresponding to the second microphone, the first microphone is a sound receiving microphone for receiving a sound signal emitted by a user, the second microphone is a noise reduction microphone for receiving an external environment sound signal, and the first microphone hole is closer to the earphone head than the second microphone hole; and,

[0010] The ear hook is connected between the earphone head and the functional compartment and is used for hooking on the ear of the human body.

[0011] Furthermore, the shell includes an outer side surface facing away from the human body when the bone conduction earphone is worn and a bottom surface inclined obliquely downward, the first microphone hole is opened on the bottom surface, the outer direction of the axis of the first microphone hole does not point to the human head, and on the longitudinal section passing through the axis of the second microphone hole, the angle between the outer direction of the axis of the second microphone hole and the outer direction of the normal to the lowest point of the bottom surface is 0 to 120°, the longitudinal section refers to a surface perpendicular to the length direction of the functional bin, and the outer direction refers to the direction away from the side where the functional bin is located.

[0012] Furthermore, the second microphone hole is provided on the outer side surface, and an angle between an outer direction of an axis of the second microphone hole and an outer direction of a normal line of the lowest point of the bottom surface is 90°.

[0013] Furthermore, the first microphone hole has a first center point on the outer surface of the functional compartment, the second microphone hole has a second center point on the outer surface of the functional compartment, the first center point and the second center point constitute a first connecting line, the first center point and the outer edge of the adjacent mouth corner constitute a second connecting line, the angle between the first connecting line and the second connecting line is less than or equal to 30°, and the straight-line distance between the first center point and the second center point is greater than or equal to 16 mm.

[0014] Furthermore, the first connecting line and the second connecting line coincide with each other, and a straight-line distance between the first center point and the second center point is greater than or equal to 20 mm.

[0015] Further, the functional compartment includes a first fixing member and a second fixing member connected to the housing;

[0016] The first fixing member is provided with a first channel, one end of the first channel is connected to the first microphone hole, and the other end of the first channel is arranged corresponding to the first microphone;

[0017] The second fixing member is provided with a second channel, one end of the second channel is communicated with the second microphone hole, and the other end of the second channel is arranged corresponding to the second microphone.

[0018] Further, the first channel includes a first through hole communicating with the first microphone hole and a second through hole arranged at an angle to the first through hole.

[0019] Furthermore, the functional compartment further comprises a first waterproof breathable membrane connected to the first fixing member and sealing the first channel, and a first annular sound insulating member provided between the first waterproof breathable membrane and the first microphone;

[0020] The functional compartment further includes a second waterproof and breathable membrane connected to the second fixing member and sealing the second channel, and a second annular sound insulating member disposed between the second waterproof and breathable membrane and the second microphone.

[0021] Furthermore, the functional compartment is a control compartment, which includes a first circuit board and a second circuit board located in the shell, and the first microphone and the second microphone are respectively arranged on the first circuit board and the second circuit board.

[0022] Furthermore, the functional chamber has an outer side surface facing away from the human body and an inner side surface facing the human body when the bone conduction earphone is worn, and the outer side surface and the inner side surface are respectively two outer surfaces in the thickness direction of the functional chamber, and the first circuit board and the second circuit board are relatively spaced apart along the thickness direction of the functional chamber.

[0023] Furthermore, the number of the earphone heads and the functional compartments is two, one of the functional compartments is a control compartment, and the other is a battery compartment. The bone conduction earphone also includes an ear hook and a back hook. The two earphone heads are respectively connected to the control compartment and the battery compartment through the ear hook, and the back hook is connected between the two functional compartments.

[0024] Compared with the prior art, the utility model has the following beneficial effects: the bone conduction earphone includes an earphone head, a functional compartment and an ear hook, and the first microphone and the second microphone are arranged in the functional compartment, thereby avoiding the adverse effect of the sound waves or vibrations generated by the earphone head on the sound pickup of the first microphone and the second microphone, which is conducive to improving the accuracy of sound pickup; at the same time, space is reserved for the installation of other components, and the structure of the earphone head is simplified, which can facilitate the assembly of the earphone head. In addition, the first microphone hole is closer to the earphone head than the second microphone hole, which is conducive to improving the noise reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of a combination of a functional compartment and an earphone head of an earphone in an embodiment of the present invention.

[0026] Figure 2 It is a schematic diagram of a functional compartment of an earphone in an embodiment of the present invention.

[0027] Figure 3 It is a front view of a functional compartment of an earphone according to an embodiment of the present invention.

[0028] Figure 4 yes Figure 3 Section view along the AA cutting line.

[0029] Figure 5 yes Figure 3 Section view along the BB cutting line.

[0030] Figure 6 It is a schematic diagram of an earphone according to an embodiment of the present invention when worn on the head.

[0031] Figure 7 It is a schematic diagram of an earphone according to an embodiment of the present invention when worn on the head.

[0032] Figure 8 It is a schematic diagram of the first shell of the functional compartment of the earphone in one embodiment of the present invention.

[0033] Fig. 9 yes Figure 4 A partial enlarged view of point Ⅰ in the middle.

[0034] Fig.10 yes Figure 5 A partial enlarged view of point II in the middle.

[0035] Fig.11 It is a schematic diagram of a bone conduction headset according to an embodiment of the present invention. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some structures related to the present application are shown in the accompanying drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0037] The terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0038] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0039] like Figures 1 to 3As shown, a bone conduction earphone corresponding to a preferred embodiment of the utility model includes an earphone head 1, a functional compartment 2 and an ear hook 3.

[0040] The earphone head 1 is provided with a sound-generating device for providing sound to the human ear. For bone-conducting earphones, the sound-generating device is usually a vibration device.

[0041] The functional compartment 2 includes a shell 20 and a first microphone 21 and a second microphone 22 arranged in the shell 20. The shell 20 includes a first microphone hole 200 corresponding to the first microphone 21 and a second microphone hole 201 corresponding to the second microphone 22. Sound is transmitted to the first microphone 21 through the first microphone hole 200 and picked up by the first microphone 21. Sound is transmitted to the second microphone 22 through the second microphone hole 201 and picked up by the second microphone 22.

[0042] The ear hook 3 is connected between the earphone head 1 and the functional compartment 2, and is designed in an arc shape for hooking on the human ear, thereby fixing the earphone head 1 and the functional compartment 2 at the human ear position and improving the wearing stability. After wearing, the earphone head 1 is closer to the front of the human body than the functional compartment 2. Usually, the functional compartment 2 is located behind the ear.

[0043] The first microphone 21 and the second microphone 22 are arranged in the functional compartment 2, thereby preventing the sound waves or vibrations generated by the sound-generating device in the earphone head 1 from having an adverse effect on the sound pickup of the first microphone 21 and the second microphone 22. For example, for bone conduction headphones, the position of the microphone is set to be away from the vibrator, and the vibration is transmitted to the functional compartment 2 through the ear hook 3, and its energy will be greatly attenuated, which can reduce the influence of echo and vibration. On the other hand, arranging the first microphone 21 and the second microphone 22 in the functional compartment 2 leaves space for the installation of other components, and at the same time can simplify the structure of the earphone head 1 and facilitate the assembly of the earphone head 1.

[0044] The two microphones arranged in the functional compartment 2 have different main functions. The first microphone 21 is a receiving microphone for receiving sound signals emitted by the user, and the second microphone 22 is a noise reduction microphone for receiving external environmental sound signals. The first microphone 21 and the second microphone 22 transmit the sound signals they receive respectively to the processing module of the headset. After the sound signals are processed by the processing module, the environmental noise in the sound signals emitted by the user received by the first microphone 21 can be filtered out, thereby improving the call quality. In short, the dual-microphone noise reduction technology is adopted, the main microphone (first microphone 21) is used to maintain a stable call, and the auxiliary microphone (second microphone 22) is used to eliminate noise.

[0045] As a preferred embodiment, the first microphone hole 200 is closer to the earphone head 1 than the second microphone hole 201. When receiving sound signals, the first microphone hole 200 is closer to the human mouth, so the first microphone 21 can receive clearer human voices, and the second microphone hole 201 is farther away from the mouth, so the second microphone 22 can receive clearer ambient noise and reduce the pickup of human voices. In this way, the active noise reduction effect of the first microphone 21 and the second microphone 22 is better.

[0046] like Figures 3 to 5 As shown, the housing 20 includes an outer side surface 202 facing away from the human body when the bone conduction earphone is worn and a bottom surface 203 tilted obliquely downward. When the bone conduction earphone is worn, the functional compartment 2 will tilt toward the side where the mouth is located, so that the bottom surface 203 is arranged toward or close to the mouth. Preferably, after the bone conduction earphone is worn, the axis 200a of the first microphone hole 200 points to the human mouth. The first microphone hole 200 is opened on the bottom surface 203. The second microphone hole 201 can be arranged on the outer side surface 202, on the bottom surface 203 or at other positions, refer to Figure 4 , the outward direction of the axis 201a of the second microphone hole 201 does not point to the head of the human body. On the longitudinal section passing through the axis 201a of the second microphone hole 201, the angle A between the outward direction of the axis 201a and the outward direction of the normal 203a at the lowest point of the bottom surface 203 is 0 to 120°. The longitudinal section refers to the surface perpendicular to the length direction of the functional chamber 2, and the outward direction refers to the direction away from the side where the functional chamber 2 is located. When the angle A is 0°, the second microphone hole 201 can be set on the bottom surface 203 at the same time as the first microphone hole 200. At this time, the processing of the functional chamber 2 and the assembly of the internal parts are more convenient. When the angle A increases, the distance between the second microphone hole 201 and the first microphone hole 200 gradually increases, which is conducive to improving the noise reduction effect.

[0047] Optionally, the second microphone hole 201 is opened on the outer side surface 202, and the angle A is 90°. In this case, the human voice can be transmitted to the first microphone 21 more directly, which improves the performance of the first microphone 21 in receiving the voice emitted by the user, and also reduces the influence of the voice emitted by the user on the second microphone 22. As a preferred embodiment, the axis 200a of the first microphone hole 200 is perpendicular to the thickness direction Z of the functional compartment 2, and the axis 201a of the second microphone hole 201 is parallel to the thickness direction Z of the functional compartment 2.

[0048] During a call, the main function of the second microphone 22 is to receive sound signals from the external environment and transmit the sound signals to the processing module. The processing module filters the external noise in the first microphone 21 according to the sound signals transmitted by the second microphone 22, thereby improving the call quality.

[0049] The first microphone hole 200 has a first center point on the outer surface of the functional compartment 2, and the second microphone hole 201 has a second center point on the outer surface of the functional compartment 2. As a preferred embodiment, Figure 6 As shown, when the bone conduction earphone is worn, the first center point and the second center point form a first connecting line 2001, and the first center point and the adjacent mouth corner 205 form a second connecting line 2002. The mouth corner 205 can be understood as the outermost end point of the mouth in the horizontal direction. Figure 6 The figure simply illustrates the relative position of the bone conduction earphones to the human body when worn, and illustrates the approximate position of the connecting lines. The angle B between the first connecting line 2001 and the second connecting line 2002 is set to be less than or equal to 30°. By setting the angle between the first connecting line 2001 and the second connecting line 2002 to be less than 30°, it is beneficial to make the distance between the second microphone hole 201 and the mouth farther, thereby increasing the loudness of the human voice received by the first microphone 21 and reducing the loudness of the human voice received by the second microphone 22, which is beneficial to improving the noise reduction effect. As a further improvement, the angle B between the first connecting line 2001 and the second connecting line 2002 is set to be less than 15°. As a further improvement, refer to Figure 7 , the angle B between the first line 2001 and the second line 2002 is set to 0°, that is, the first line 2001 and the second line 2002 coincide with each other. At this time, the first line 2001 directly passes through the mouth corner 205, which is conducive to further improving the noise reduction effect.

[0050] As a preferred embodiment, the distance between the first center point of the first microphone hole 200 and the second center point of the second microphone hole 201 is greater than or equal to 16 mm, so as to reduce the correlation of the signals received by the two microphones, so that the loudness of the human voice received by the second microphone 22 is significantly smaller than the loudness of the human voice received by the second microphone 22, thereby improving the noise reduction effect. Figure 3 and Figure 4 As shown, the functional chamber 2 is configured to have a length (i.e., the dimension of the functional chamber 2 along the X-axis direction) greater than its width (i.e., the dimension of the functional chamber 2 along the Y-axis direction) and thickness (i.e., the dimension along the Z-axis direction) to increase the distance between the two microphone holes. As a further improvement, the distance between the first center point of the first microphone hole 200 and the second center point of the second microphone hole 201 is greater than or equal to 20 mm; as a further improvement, the distance between the first center point of the first microphone hole 200 and the second center point of the second microphone hole 201 is greater than or equal to 25 mm.

[0051] like Figures 3 to 5As shown, the function chamber 2 has an outer side 202 facing away from the human body and an inner side 204 facing the human body when the bone conduction earphone is worn, and the outer side 202 and the inner side 204 are respectively two outer surfaces of the function chamber 2 in the thickness direction Z. In some embodiments, the function chamber 2 is a control chamber, which also includes a circuit board assembly, and a control module is arranged on the circuit board assembly, which can process the signal received by the microphone and control the bone conduction earphone, and generally includes a processor and a matching circuit.

[0052] As a preferred embodiment, the circuit board assembly includes a first circuit board 4 and a second circuit board 5, and the first circuit board 4 and the second circuit board 5 are arranged relatively spaced apart along the thickness direction Z of the functional compartment 2. The first microphone 21 and the second microphone 22 are respectively arranged on the first circuit board 4 and the second circuit board 5, and the first circuit board 4 and the second circuit board 5 are respectively provided with a first circuit board through hole 40 and a second circuit board through hole 50, and the sound receiving surfaces of the first microphone 21 and the second microphone 22 are respectively arranged corresponding to the first circuit board through hole 40 and the second circuit board through hole 50; the sound receiving surfaces of the first microphone 21 and the second microphone 22 are arranged parallel to the first circuit board 4 and the second circuit board 5.

[0053] like Figure 3 and Figure 8 As shown, the functional compartment 2 includes a first fixing member 23 and a second fixing member 24 connected to the housing 20. Specifically, the housing 20 includes a first shell 2a and a second shell 2b, and the first fixing member 23 and the second fixing member 24 are both arranged on the inner surface of the first shell 2a.

[0054] Further, such as Figure 4 , Figure 5 and Figure 8 As shown, the first fixing member 23 is provided with a first channel 230, one end of the first channel 230 is connected to the first microphone hole 200, and the other end is provided corresponding to the first microphone 21 ( Figure 5 The second fixing member 24 is provided with a second channel 240, one end of which is connected to the second microphone hole 201, and the other end is provided corresponding to the second microphone 22. The first microphone 21 and the second microphone 22 are provided on the first circuit board 4 and the second circuit board 5, respectively. The first channel 230 of the first fixing member 23 and the second channel 240 of the second fixing member 24 transmit the sound signals from the first microphone hole 200 and the second microphone hole 201 to the first microphone 21 and the second microphone 22 in the functional compartment 2 through the first circuit board through hole 40 and the second circuit board through hole 50, respectively.

[0055] Figure 8In the illustrated embodiment, the first fixing member 23 and the second fixing member 24 are integrally formed with the first housing 2a, for example, the fixing members are directly formed on the housing by injection molding. In other embodiments, the fixing members may also be independent parts connected to the corresponding housing by welding or bonding.

[0056] like Figure 5 and Fig.10 As shown, the first channel 230 and the second channel 240 can extend the path of sound transmission and reduce wind noise. As a preferred embodiment, the first channel 230 is provided with a first through hole 2300 connected to the first microphone hole 200 and a second through hole 2301 arranged at an angle to the first through hole 2300. As a preferred embodiment, the first through hole 2300 and the second through hole 2301 are arranged vertically (that is, the axes of the two through holes are perpendicular to each other). Through the design of the first through hole 2300 and the second through hole 2301, the sound signal can be transmitted along the transmission channel composed of the first microphone hole 200, the first through hole 2300, the second through hole 2301 and the first circuit board through hole 40, which is conducive to further extending the sound path and reducing wind noise.

[0057] like Fig. 9 and Fig.10As shown, the functional compartment 2 includes a first waterproof breathable membrane 232 connected to the first fixing member 23 and sealing the first channel 230, and a first annular soundproofing member 233 disposed between the first waterproof breathable membrane 232 and the first microphone 21; the functional compartment 2 also includes a second waterproof breathable membrane 242 connected to the second fixing member 24 and sealing the second channel 240, and a second annular soundproofing member 243 disposed between the second waterproof breathable membrane 242 and the second microphone 22. The first waterproof breathable membrane 232 and the second waterproof breathable membrane 242 can play a waterproof role, improve the service life of the bone conduction earphone, and do not affect the transmission of sound. The first annular soundproofing member 233 and the second annular soundproofing member 243 are made of soundproofing materials, such as porous soft materials such as foam. The first fixing member 23 and the second fixing member 24 are respectively provided with a first annular groove 231 and a second annular groove 241, the first waterproof breathable membrane 232 and the second waterproof breathable membrane 242 are respectively connected to the first annular sound insulating member 233 and the second annular sound insulating member 243 (for example, they can be fixed by gluing), and are respectively arranged in the first annular groove 231 and the second annular groove 241, the surfaces of the first annular sound insulating member 233 and the second annular sound insulating member 243 that are away from being connected to the first waterproof breathable membrane 232 and the second waterproof breathable membrane 242 are respectively connected to the first circuit board 4 and the second circuit board 5, the first annular sound insulating member 233 and the second annular sound insulating member 243 are correspondingly arranged to the first circuit board through hole 40 and the second circuit board through hole 50; as a preferred embodiment, the axes of the first annular sound insulating member 233 and the second annular sound insulating member 243 coincide with the first circuit board through hole 40 and the second circuit board through hole 50, respectively. The first annular sound insulation member 233 and the second annular sound insulation member 243 adopt an annular design, which can prevent the sound from leaking into the functional compartment 2, and can also prevent the sound in the functional compartment 2 from being picked up by the microphone, which is beneficial to reduce the mutual interference caused by the sound entering from the first microphone hole 200 and the second microphone hole 201.

[0058] As a preferred embodiment, Fig.11 As shown, there are two earphone heads 1 and two functional compartments 2, one of which is a control compartment and the other is a battery compartment. The bone conduction earphone also includes an ear hook 3 and a back hook 60. Both the back hook 60 and the ear hook 3 are elastic, and can be made of elastic materials such as titanium wire, manganese steel wire, and stainless steel wire with a rubber coating on the outside. The two earphone heads 1 are respectively connected to the two functional compartments 2 through the ear hooks 3, and the ear hooks 3 are designed in an arc shape close to the contour of the human ear, thereby improving the stability and comfort of the user when wearing. The back hook 60 is connected between the two functional compartments 2. Since both the back hook 60 and the ear hook 3 are elastic, a clamping force is generated between the two earphone heads 1 and the human skin, thereby improving the stability of the bone conduction earphone when worn and improving the vibration transmission efficiency.

[0059] The above are only specific implementations of the present invention, and any improvements made based on the concept of the present invention are considered to be within the protection scope of the present invention.

Claims

1. A bone conduction headset, characterized in that: include: Headphone head (1); A functional compartment (2), comprising a housing (20) and a first microphone (21) and a second microphone (22) arranged in the housing (20), the housing (20) comprising a first microphone hole (200) corresponding to the first microphone (21) and a second microphone hole (201) corresponding to the second microphone (22), the first microphone (21) being a sound receiving microphone for receiving a sound signal emitted by a user, the second microphone (22) being a noise reduction microphone for receiving an external environment sound signal, the first microphone hole (200) being closer to the earphone head (1) than the second microphone hole (201); as well as, An ear hook (3) is connected between the earphone head (1) and the functional compartment (2) and is used for hooking on the ear of a human body.

2. The bone conduction earphone according to claim 1, characterized in that: The housing (20) comprises an outer side surface (202) facing away from the human body when the bone conduction earphone is worn, and a bottom surface (203) inclined obliquely downward, the first microphone hole (200) is opened on the bottom surface (203), the outer direction of the axis of the second microphone hole (201) does not point to the human head, and on a longitudinal section passing through the axis of the second microphone hole (201), the angle between the outer direction of the axis of the second microphone hole (201) and the outer direction of the normal (203a) at the lowest point of the bottom surface (203) is 0 to 120°, the longitudinal section refers to a surface perpendicular to the length direction of the functional chamber (2), and the outer direction refers to a direction away from the side where the functional chamber (2) is located.

3. The bone conduction earphone according to claim 2, characterized in that: The second microphone hole (201) is opened on the outer side surface (202), and the angle between the outer direction of the axis of the second microphone hole (201) and the outer direction of the normal (203a) of the lowest point of the bottom surface (203) is 90°.

4. The bone conduction earphone according to claim 1, characterized in that: The first microphone hole (200) has a first center point on the outer surface of the functional chamber (2), and the second microphone hole (201) has a second center point on the outer surface of the functional chamber (2), the first center point and the second center point form a first connecting line (2001), the first center point and the outer edge of the adjacent mouth corner (205) form a second connecting line (2002), the angle between the first connecting line (2001) and the second connecting line (2002) is less than or equal to 30°, and the straight-line distance between the first center point and the second center point is greater than or equal to 16 mm.

5. The bone conduction earphone according to claim 4, characterized in that: The first connecting line (2001) and the second connecting line (2002) coincide with each other, and a straight-line distance between the first center point and the second center point is greater than or equal to 20 mm.

6. The bone conduction earphone according to any one of claims 1 to 5, characterized in that: The functional compartment (2) comprises a first fixing member (23) and a second fixing member (24) connected to the housing (20); The first fixing member (23) is provided with a first channel (230), one end of the first channel (230) is in communication with the first microphone hole (200), and the other end is arranged corresponding to the first microphone (21); The second fixing member (24) is provided with a second channel (240), one end of the second channel (240) is in communication with the second microphone hole (201), and the other end is arranged corresponding to the second microphone (22).

7. The bone conduction earphone according to claim 6, characterized in that: The first channel (230) comprises a first through hole (2300) communicating with the first microphone hole (200) and a second through hole (2301) arranged at an angle to the first through hole (2300).

8. The bone conduction earphone according to claim 7, characterized in that: The functional compartment (2) further comprises a first waterproof and breathable membrane (232) connected to the first fixing member (23) and sealing the first channel (230), and a first annular sound insulating member (233) arranged between the first waterproof and breathable membrane (232) and the first microphone (21); The functional compartment (2) further comprises a second waterproof breathable membrane (242) connected to the second fixing member (24) and sealing the second channel (240), and a second annular sound insulating member (243) arranged between the second waterproof breathable membrane (242) and the second microphone (22).

9. The bone conduction earphone according to claim 7, characterized in that: The functional compartment (2) is a control compartment, which comprises a first circuit board (4) and a second circuit board (5) located in the housing (20); the first microphone (21) and the second microphone (22) are respectively arranged on the first circuit board (4) and the second circuit board (5).

10. The bone conduction earphone according to claim 9, characterized in that: The functional chamber (2) comprises an outer side surface (202) facing away from the human body and an inner side surface (204) facing the human body when the bone conduction earphone is worn, the outer side surface (202) and the inner side surface (204) are respectively two outer surfaces in the thickness direction of the functional chamber (2), and the first circuit board (4) and the second circuit board (5) are arranged relatively spaced apart along the thickness direction of the functional chamber (2).

11. The bone conduction earphone according to any one of claims 1 to 5, characterized in that: The number of the earphone heads (1) and the functional compartments (2) is two, one of the functional compartments (2) is a control compartment, and the other is a battery compartment. The bone conduction earphone further comprises an ear hook (3) and a back hook (60), the two earphone heads (1) are respectively connected to the control compartment and the battery compartment via the ear hook (3), and the back hook (60) is connected between the two functional compartments (2).

Images