Bone conduction earphone
By designing the headset with sound output holes in the bone conduction headphones, the superposition of bone conduction and air conduction is achieved, solving the problems of insufficient loudness and sound leakage in medium and high frequency, improving the loudness and reducing sound leakage. .
Patent Information
- Application Number
- CN202420283429.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-06
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-02-06
AI Technical Summary
There is a common problem of insufficient medium and high frequency loudness in existing bone conduction headphones, and in order to improve loudness, headphones that integrate bone conduction and air conduction have sound leakage problems.
Design a bone conduction earphone, including the contact area where the head case contacts the human face and the extension area extends outside the ear canal. The extension area is equipped with a sound outlet hole. The bone conduction speaker drives the head case to vibrate, and the vibration passes through the sound outlet. The holes are directly transmitted into the ear canal, achieving air conduction, improving sound loudness and reducing sound leakage.
Through the superposition of bone conduction and gas conduction, the loudness of the sound is significantly improved, and the sound leakage is effectively reduced because the sound outlet is close to the ear canal.
Smart Images
Figure CN222169982U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bone conduction sound generation, in particular to a bone conduction earphone. Background Art
[0002] Bone conduction headphones use the vibration of the bone conduction speaker inside the headphones to drive the vibration of the face part on the side of the ear, and further drive the vibration of the human skull, transmitting the sound directly to the inner ear and cochlear nerve in the ear canal, so that people can hear the sound. Figure 1 As shown, Figure 1 It is a structural diagram of the ear 4, which mainly includes an auricle 401, an ear canal 402 located inside the auricle 401, and a tragus 403 located outside the ear canal 402. The tragus 403 is a protrusion located outside the ear canal 402, and the part outside the tragus 403 is a human face part 404.
[0003] like Figure 2 As shown, Figure 2 This is a schematic diagram of a bone conduction headset worn on the ear, where the headset headshell 1 is attached to the human face part 404 outside the auricle 403, and the facial bones are vibrated to make people hear the sound. However, bone conduction headsets in the prior art generally have the problem of insufficient mid- and high-frequency loudness; some bone conduction headsets are integrated with bone conduction and air conduction to improve the mid- and high-frequency loudness, and two sound-generating elements, bone conduction speakers and air conduction speakers, are needed; some bone conduction headsets are integrated with bone conduction and air conduction to improve the mid- and high-frequency loudness, and use a separate bone conduction speaker. The air conduction hole is on the side of the headset shell, and is not directly transmitted to the ear canal, so the loudness is not improved enough, and there is a sound leakage problem.
[0004] Therefore, it is necessary to improve the prior art to overcome the above defects in the prior art. Utility Model Content
[0005] The utility model aims to provide a bone conduction earphone, which can improve the loudness of the sound heard by human ears and reduce the generation of sound leakage.
[0006] In order to achieve the above-mentioned utility model object, the utility model proposes a bone conduction earphone, comprising
[0007] The earphone headshell comprises a first shell, wherein the first shell comprises a contact area for contacting a human face when the bone conduction earphone is worn and an extension area extending outside the ear canal, wherein the extension area is provided with at least one sound outlet hole; and
[0008] The bone conduction speaker is arranged in the head shell of the earphone and is used to drive the first shell to vibrate.
[0009] Furthermore, a projection of the sound outlet along the vibration direction of the bone conduction speaker is located inside the bone conduction speaker, and the sound outlet is located within the extension area, and a ratio of a length from the center of the sound outlet to an edge of the extension area of the first shell to a length from the center of the sound outlet to an edge of a contact area of the first shell is 0.1 to 2.
[0010] Furthermore, a ratio of a length from the center of the sound hole to an edge of an extension area of the first housing to a length from the center of the sound hole to an edge of a contact area of the first housing is 0.2-0.5.
[0011] Furthermore, the first shell is provided with a mesh cloth covering the sound outlet, and the mesh cloth is a dustproof and / or waterproof mesh cloth.
[0012] Furthermore, the area of the sound outlet is 0.8-8 mm 2 .
[0013] Furthermore, the area of the sound outlet is 1 to 3 mm 2 .
[0014] Furthermore, the ratio between the area of the contact region and the area of the extension region is 0.5-4.
[0015] Furthermore, the ratio between the area of the contact region and the area of the extension region is 1-3.
[0016] Furthermore, the area of the contact area is 60 to 240 mm 2 The area of the extended region is 40 to 200 mm 2 .
[0017] Furthermore, the area of the contact region is 100 to 200 mm 2 The area of the extended region is 40 to 120 mm 2 .
[0018] Further, the contact area and the extension area are on the same plane; or,
[0019] A recessed area for avoiding the tragus is provided between the contact area and the extension area; or,
[0020] The contact area and the extension area are arranged in a stepped shape, and the contact area protrudes toward the human face relative to the extension area.
[0021] Furthermore, the earphone head shell further comprises a second shell connected to the first shell, the first shell is connected to an open end of the second shell, and the first shell and the second shell cooperate to form a receiving cavity;
[0022] The second housing is a single integrally formed part; or,
[0023] The second housing includes a bottom housing and a middle housing connected between the bottom housing and the first housing.
[0024] Furthermore, the bone conduction speaker comprises:
[0025] A housing, including an inner cavity, wherein the housing is provided with a first open end;
[0026] A vibrator assembly, disposed in the inner cavity;
[0027] a stator assembly, fixed relative to the housing and used to drive the vibrator assembly to vibrate; and
[0028] The first spring piece is arranged at the first opening end, the first spring piece is connected between the shell and the vibrator assembly, and is arranged opposite to the sound outlet hole.
[0029] Furthermore, the bone conduction speaker further comprises a second spring sheet connected between the vibrator assembly and the housing, and the first spring sheet and the second spring sheet are respectively connected to two ends of the vibrator assembly;
[0030] The shell is provided with a second opening end, the first opening end and the second opening end are respectively located at two ends of the shell, and the second elastic sheet is provided at the second opening end;
[0031] The vibrator assembly includes at least two magnets and a magnetic conductive plate connected between two adjacent magnets, the two adjacent magnets are arranged opposite to each other with the same poles, and the stator assembly includes at least one coil surrounding the outer circumference of the magnetic conductive plate.
[0032] Furthermore, it also includes an ear hook, which is connected to the headphone headshell and is used to hang on the ear;
[0033] When the bone conduction earphone is worn on a human head, the sound outlet is arranged opposite to the ear canal.
[0034] Compared with the prior art, the utility model has the following beneficial effects: the bone conduction earphone provided by the utility model comprises a first shell comprising a contact area for contacting a human face and an extension area extending outside the ear canal, and the extension area is provided with at least one sound outlet hole arranged opposite to the ear canal; the bone conduction speaker drives the first shell to vibrate, and the vibration is transmitted to the human face skin through the first shell to realize bone conduction sound transmission, and at the same time, the vibration of the bone conduction speaker drives the gas inside the earphone headshell to vibrate to generate sound, and the sound is directly transmitted into the ear canal from the sound outlet hole to realize air conduction sound transmission, and the superposition of bone conduction and air conduction sound transmission can improve the loudness of the sound heard by the human ear, and because the sound outlet hole is closer to the ear canal, the sound can be transmitted to the ear canal more efficiently, which is conducive to reducing the generation of sound leakage and further increasing the air conduction sound heard. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] Figure 1 This is a diagram of the structure of the ear;
[0036] Figure 2 It is a schematic diagram of a bone conduction earphone worn on the ear in the prior art;
[0037] Figure 3 It is a schematic diagram of the bone conduction earphone in the utility model being worn on the ear;
[0038] Figure 4 It is a structural schematic diagram of the earphone headshell of the bone conduction earphone in the utility model;
[0039] Figure 5 This is a schematic structural diagram of a first housing in an embodiment of the utility model;
[0040] Figure 6 yes Figure 5 A schematic diagram showing the corresponding areas of the contact area and the extension area is shown with different section lines;
[0041] Figure 7 It is an exploded view of the earphone head of the bone conduction earphone in the utility model;
[0042] Figure 8 It is a cross-sectional view of the earphone head of the bone conduction earphone in the utility model;
[0043] Fig. 9 is a cross-sectional view of a first housing of an embodiment of the utility model;
[0044] Fig.10 yes Fig. 9 A schematic diagram showing the corresponding areas of the contact area and the extension area is shown with different section lines;
[0045] Fig.11 is a cross-sectional view of a first housing of an embodiment of the utility model;
[0046] Fig.12 yes Fig.11 A schematic diagram showing the corresponding areas of the contact area and the extension area is shown with different section lines;
[0047] Fig.13 It is a cross-sectional view of a bone conduction speaker according to an embodiment of the present invention. DETAILED DESCRIPTION
[0048] 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.
[0049] 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.
[0050] 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.
[0051] like Figures 4 to 8 As shown, the present application proposes a bone conduction earphone, comprising an earphone head, wherein the earphone head comprises an earphone head shell 1 and a bone conduction speaker 2.
[0052] The earphone head shell 1 includes a first shell 101 , which includes a contact area 1011 for contacting a human face 404 when the bone conduction earphone is worn, and an extension area 1012 extending out of the ear canal 402 , wherein the extension area 1012 is provided with at least one sound outlet hole 1013 .
[0053] The bone conduction speaker 2 is disposed in the earphone head shell 1 and is used to drive the first housing 101 to vibrate.
[0054] like Figure 5As shown, the first housing 101 includes a contact area 1011 in contact with the human face 404 and an extension area 1012 extending outside the ear canal 402, and the contact area 1011 and the extension area 1012 are respectively located on opposite sides of the isolation line A. When the bone conduction earphone is in working state, the bone conduction speaker 2 converts electrical energy into mechanical energy for vibration, and the vibration is transmitted to the contact area 1011 of the first housing 101 and then to the human skull bone, and then to the auditory nerve to form bone conduction, so that people can hear bone conduction sound signals; at the same time, the extension area 1012 is provided with at least one sound outlet 1013, which can conduct the air pushed by the bone conduction speaker 2 when it vibrates to the ear canal 402 through the sound outlet 1013 to form air conduction, so that people can hear air conduction sound signals. The superposition of bone conduction and air conduction can increase the loudness of the sound heard by the human ear.
[0055] Since the sound outlet 1013 is closer to the ear canal 402, the sound can be directly transmitted to the ear canal 402 through the sound outlet 1013, thereby increasing the loudness of the air-conducted sound heard by the human ear. Furthermore, the sound transmitted from the sound outlet 1013 can be blocked by the ear canal, the auricle, the first housing 101 and other components, thereby effectively reducing sound leakage.
[0056] In some embodiments, when the bone conduction earphone is worn on a human head, the sound outlet 1013 is arranged to be directly opposite to the ear canal 402 to further increase the loudness of the air-conducted sound heard by the human ear and reduce the generation of sound leakage.
[0057] As a preferred embodiment, Figure 8 As shown, the projection of the sound outlet 1013 along the vibration direction C of the bone conduction speaker 2 is located inside the bone conduction speaker 2, so that the gas driven by the bone conduction speaker 2 can be more efficiently transmitted from the sound outlet 1013, the sound transmission efficiency is higher, and the loss of high-frequency sensitivity can be reduced. Preferably, the sound outlet 1013 is located in the extension area 1012, and the ratio of the length from the center of the sound outlet 1013 to the edge of the extension area 1012 of the first housing 101 to the length from the center of the sound outlet 1013 to the edge of the contact area 1011 of the first housing 101 is 0.1-2; more preferably, the ratio of the length from the center of the sound outlet 1013 to the edge of the extension area of the first housing 101 to the length from the center of the sound outlet 1013 to the edge of the contact area 1011 of the first housing 101 is 0.2-0.5. The smaller the ratio, the closer the sound outlet 1013 is to the human ear, so that the gas transmits sound waves better, which can improve the sound quality of air conduction.
[0058] As a preferred embodiment, the area of the sound outlet hole 1013 is 0.8 to 80 mm. 2 Preferably, the area of the sound outlet hole 1013 is 1 to 3 mm 2, which is conducive to the sound being transmitted from the sound outlet hole 1013. When there are multiple sound outlet holes 1013, the area of the sound outlet hole 1013 refers to the sum of the areas of all the sound outlet holes 1013.
[0059] The first housing 101 is provided with a mesh 1014 covering the sound outlet 1013. Figure 8 As shown, the mesh 1014 is arranged on the inner side of the first housing 101 and connected to the inner surface of the first housing 101. Of course, the mesh 1014 can also be arranged on the outer side of the first housing 101, or arranged in the sound outlet 1013. The position of the mesh 1014 can be set as needed. At the same time, preferably, the mesh 1014 can be a dustproof mesh with a dustproof effect; or a waterproof mesh with a waterproof effect, or a combination of a dustproof mesh and a waterproof mesh. Of course, other functional meshes can also be selected as needed, which is not limited here.
[0060] The overall shape of the contact area 1011 and the extension area 1012 is not limited, and may be, for example, circular, rectangular, elliptical, etc. In this embodiment, Figure 6 , Fig.10 and Fig.12 As shown, after the contact area 1011 and the extension area 1012 are spliced together, the overall outer contour is in the shape of a racetrack.
[0061] In some embodiments, Figure 8 As shown, the contact area 1011 and the extension area 1012 are on the same plane. Figure 6 The areas corresponding to the contact region 1011 and the extension region 1012 are shown with different section lines. The areas of the contact region 1011 and the extension region 1012 are S1 and S2, respectively.
[0062] In other embodiments, Fig. 9 As shown, a recessed area 1015 for avoiding the tragus 403 is provided between the contact area 1011 and the extension area 1012. The height positions of the contact area 1011 and the extension area 1012 are not limited. For example, the contact area 1011 can be arranged to be flush with the extension area 1012, or the contact area 1011 can be arranged to protrude toward the face part 404 relative to the extension area 1012, or the contact area 1011 can be arranged to be recessed toward the face part 404 relative to the extension area 1012. When the extension area 1012 is arranged to protrude toward the skin relative to the contact area 1011, the distance between it and the ear canal 402 is closer, which can further increase air-conducted sound and reduce sound leakage. Conversely, when the contact area 1011 protrudes toward the face part 404 relative to the extension area 1012, the effect of avoiding the tragus 403 is better. Fig.10The areas corresponding to the contact region 1011 and the extension region 1012 are shown with different section lines. The areas of the contact region 1011 and the extension region 1012 are S1 and S2, respectively.
[0063] In some other embodiments, Fig.11 As shown, the contact area 1011 and the extension area 1012 are arranged in a stepped shape, the contact area 1011 protrudes toward the human face portion 404 relative to the extension area 1012, and the extension area 1012 is partially arranged opposite to the tragus 403, so it can play a role in avoiding the tragus 403. Since the tragus 403 is an outwardly protruding structure, the arrangement of the structure avoiding the tragus 403 can make the wearing more comfortable and make the contact area 1011 fit the skin more closely. Fig.12 The areas corresponding to the contact region 1011 and the extension region 1012 are shown with different section lines. The areas of the contact region 1011 and the extension region 1012 are S1 and S2, respectively.
[0064] Preferably, the contact area 1011 and the extension area 1012 are both planar.
[0065] In some embodiments, the ratio between the area S1 of the contact area 1011 and the area S2 of the extension area 1012 is: 0.5~4. Preferably, the ratio between the area S1 of the contact area 1011 and the area S2 of the extension area 1012 is: 1~3. The ratio of the contact area 1011 and the extension area 1012 is the ratio of the energy transmitted by bone conduction and air conduction. In the present application, bone conduction is the main transmission method and air conduction is auxiliary. Therefore, setting a suitable ratio can combine the sound transmission effect and sound quality of the two conductions. At the same time, the earphone head has enough area to contact the skin for bone conduction sound transmission, and can cover a certain area of the ear canal 402, thereby improving the effect of reducing sound leakage.
[0066] According to the above, the area S1 of the contact region 1011 is 60 to 240 mm. 2 , the area S2 of the extension region 1012 is 40 to 200 mm 2 Preferably, the area S1 of the contact region 1011 is 100 to 200 mm 2 , the area S2 of the extension region 1012 is 40 to 120 mm 2 In this way, the larger the contact area, the better the bone conduction sound quality, but it cannot be infinitely large to prevent the size of the earphone from increasing.
[0067] The earphone head shell 1 also includes a second shell 102 connected to the first shell 101. The first shell 101 is connected to the open end of the second shell 102. The first shell 101 and the second shell 102 cooperate to form a receiving cavity 103, and the bone conduction speaker 2 is installed in the receiving cavity 103.
[0068] In some embodiments, the second housing 102 is a single integrally formed part. In other embodiments, the second housing 102 may be composed of multiple parts connected together. Figure 4 , Figure 7 and Figure 8 As shown, the second housing 102 includes a bottom housing 1021 and a middle housing 1022, and the first housing 101 is connected to the middle housing 1022. It can be understood that the bottom housing 1021 is connected to the middle housing 1022, and the middle housing 1022 is further connected to the first housing 101, making the assembly of the earphone head housing 1 more convenient.
[0069] There is no limit to the structure of the bone conduction speaker. Any bone conduction speaker in the prior art can be applied here if there is no conflict. For example, it can be a bone conduction speaker of a dynamic coil type, a moving iron type, a magnetostrictive type, etc. The bone conduction speaker can be with a diaphragm or without a diaphragm. When the bone conduction speaker is with a diaphragm, it can more efficiently actuate the air to produce sound.
[0070] As a preferred embodiment, Fig.13 As shown, the bone conduction speaker 2 includes a housing 201 , a vibrator assembly 202 , a stator assembly 203 and a first elastic piece 204 .
[0071] The housing 201 includes an inner cavity 2013 , and the housing 201 is provided with a first open end 2011 .
[0072] The vibrator assembly 202 is disposed in the inner cavity 2013 .
[0073] The stator assembly 203 is relatively fixed to the housing 201 and is used to drive the vibrator assembly to vibrate.
[0074] The first elastic sheet 204 is disposed at the first open end 2011 . The first elastic sheet 201 is connected between the housing 201 and the vibrator assembly 202 , and is disposed opposite to the sound outlet 1013 .
[0075] The air conduction sound outlet hole 1013 is located above the first spring piece 204, not on the side, and has no sound guide pipe, which can reduce the loss of high-frequency sensitivity.
[0076] The bone conduction speaker 2 further includes a second spring piece 205 connected between the vibrator assembly 202 and the housing 201, the first spring piece 204 and the second spring piece 205 are respectively connected to the two ends of the vibrator assembly 202; the housing 201 is provided with a second open end 2012, the first open end 2011 and the second open end 2012 are respectively located at the two ends of the housing 201, and the second spring piece 205 is provided at the second open end. The two ends of the vibration direction A of the vibrator assembly 202 are respectively connected to the first spring piece 204 and the second spring piece 205. The first spring piece 204 and the second spring piece 205 have the same structure, and the double spring piece structure is adopted to ensure the stability of the vibrator assembly 202 and improve the reliability of the product.
[0077] Since the bone conduction sound generating device 2 is an integral component, it can be completely installed in the earphone headshell 1 after installation, thus making the assembly of the bone conduction earphone more convenient.
[0078] like Figure 7 As shown, the first elastic sheet 204 and the second elastic sheet 205 each include an outer bracket 206 fixed relatively to the housing 201, an inner bracket 207 disposed in the outer bracket 206, and an elastic arm 208 connected between the outer bracket 206 and the inner bracket 207. The outer bracket 206 is connected to the housing 204, and the inner bracket 207 is directly connected to the vibrator assembly 202 or connected through a gasket 210. Preferably, the sound outlet 1013 is at least partially disposed opposite to the inner bracket 207 to further improve the efficiency of the gas driven by the inner bracket 207 passing through the sound outlet 1013.
[0079] There are two elastic arms 208, and the two elastic arms 208 are centrally symmetrically arranged. The head end of the elastic arm 208 is connected to the outer circumference of the inner bracket 207, and the tail end of the elastic arm 208 is connected to the inner circumference of the outer bracket 206. The width and length of the elastic arm 208 are determined in response to design requirements. The arm width and length are adjusted as needed to cooperate with the vibration component of the bone conduction sound generating device to achieve the target F0 characteristics; generally speaking, the longer the arm length of the elastic arm 208 and the smaller the arm width, the easier it is to achieve a lower F0 characteristic, that is, the smaller the K value of the spring.
[0080] The double elastic arm shrapnel structure can provide more space for the elastic arm design, and a lower K value can be achieved under the conditions of the same wall thickness and elastic arm width; under the same vibration conditions, a lower F0 characteristic of the bone conduction sound generator can be achieved compared to the shrapnel structure with three or more elastic arms.
[0081] Further, such as Figure 7 As shown, two mounting holes 209 are provided on the inner bracket 207, and the two mounting holes 209 are symmetrically arranged. The mounting holes 209 are used to align and connect with the vibrator assembly 202 of the bone conduction sound generating device 2, so as to facilitate the installation of the first spring piece 204 and the second spring piece 205, and improve the stability and firmness after installation.
[0082] Among them, the vibrator assembly 202 includes at least two magnets 2021 and a magnetic conductive plate 2022 connected between two adjacent magnets 2021, and the two adjacent magnets 2021 are arranged opposite to each other with the same poles; the stator assembly 203 includes at least one coil 2031 surrounding the outer periphery of the magnetic conductive plate 2022, and the coil 2031 is fixedly connected to the housing 201 through a coil bracket 2032. After the coil 2031 is energized, it generates a changing magnetic field, so that the vibrator assembly 202 vibrates up and down under the action of the magnetic field. In this embodiment, the vibrator assembly 202 can be connected to the first spring piece 204 and the second spring piece 205 through a gasket 210. It can be understood that in some other embodiments, the vibrator assembly 202 can also be other structures, which are not limited in this application.
[0083] The driving force is generated between the vibrator assembly 202 and the stator assembly 203 through the action of electromagnetic force, thereby driving the vibrator assembly 202 to vibrate.
[0084] In this embodiment, the bone conduction earphone further includes an ear hook 3, which is connected to the earphone head shell 1 and is used to hang on the ear 4. Preferably, the bone conduction earphone can be a single-ear earphone or a double-ear earphone. A single-ear earphone only includes an earphone head and an ear hook, and a double-ear earphone usually includes two earphone heads, a control compartment, a battery compartment and a back hook, and the back hook is connected between the control compartment and the battery compartment, and the control compartment and the battery compartment are both connected to an earphone head through an ear hook.
[0085] like Figure 3 As shown, the earphone head shell 1 is connected to one end of the ear hook 3.
[0086] When the bone conduction earphone is worn on the human head, the earphone headshell 1 can effectively avoid the raised area of the auricle 401, making it convenient and comfortable to wear. This is conducive to the close contact between the contact area 1011 of the first shell 101 and the human face 404, preventing the contact area 1011 from having a gap with the skin due to the auricle 401 propping up the earphone head, and the sound outlet 1013 is arranged opposite to the ear canal 402, which is conducive to shortening the distance between the sound outlet 1013 and the ear canal 402.
[0087] 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: The earphone headshell comprises a first shell, wherein the first shell comprises a contact area for contacting a human face when the bone conduction earphone is worn and an extension area extending outside the ear canal, wherein the extension area is provided with at least one sound outlet hole; and The bone conduction speaker is arranged in the head shell of the earphone and is used to drive the first shell to vibrate.
2. The bone conduction earphone according to claim 1, characterized in that: The projection of the sound outlet along the vibration direction of the bone conduction speaker is located inside the bone conduction speaker, and the sound outlet is located in the extension area, and the ratio of the length from the center of the sound outlet to the edge of the extension area of the first shell to the length from the center of the sound outlet to the edge of the contact area of the first shell is 0.1 to 2.
3. The bone conduction earphone according to claim 2, characterized in that: The ratio of the length from the center of the sound hole to the edge of the extension area of the first housing to the length from the center of the sound hole to the edge of the contact area of the first housing is 0.2-0.
5.
4. The bone conduction earphone according to claim 3, characterized in that: The first shell is provided with a mesh cloth covering the sound outlet, and the mesh cloth is a dustproof and / or waterproof mesh cloth.
5. The bone conduction earphone according to claim 1, characterized in that: The area of the sound outlet is 0.8-8 mm 2 .
6. The bone conduction earphone according to claim 1, characterized in that: The area of the sound hole is 1 to 3 mm 2 .
7. The bone conduction earphone according to claim 1, characterized in that: The ratio between the area of the contact region and the area of the extension region is 0.5-4.
8. The bone conduction earphone according to claim 7, characterized in that: The ratio between the area of the contact region and the area of the extension region is 1-3.
9. The bone conduction earphone according to claim 8, characterized in that: The contact area is 60 to 240 mm 2 The area of the extended region is 40 to 200 mm 2 .
10. The bone conduction earphone according to claim 8, characterized in that: The area of the contact area is 100 to 200 mm 2 The area of the extended region is 40 to 120 mm 2 .
11. The bone conduction earphone according to claim 1, characterized in that: The contact area and the extension area are on the same plane; or, A recessed area for avoiding the tragus is provided between the contact area and the extension area; or, The contact area and the extension area are arranged in a stepped shape, and the contact area protrudes toward the human face relative to the extension area.
12. The bone conduction earphone according to claim 1, characterized in that: The earphone head shell further includes a second shell connected to the first shell, the first shell is connected to the opening end of the second shell, and the first shell and the second shell cooperate to form a receiving cavity; The second housing is a single integrally formed part; or, The second housing includes a bottom housing and a middle housing connected between the bottom housing and the first housing.
13. The bone conduction earphone according to any one of claims 1 to 11, characterized in that: The bone conduction speaker comprises: A housing, including an inner cavity, wherein the housing is provided with a first open end; A vibrator assembly is disposed in the inner cavity; a stator assembly, fixed relative to the housing and used to drive the vibrator assembly to vibrate; and The first spring piece is arranged at the first opening end, the first spring piece is connected between the shell and the vibrator assembly, and is arranged opposite to the sound outlet hole.
14. The bone conduction earphone according to claim 13, characterized in that: The bone conduction speaker further comprises a second spring sheet connected between the vibrator assembly and the housing, wherein the first spring sheet and the second spring sheet are respectively connected to two ends of the vibrator assembly; The shell is provided with a second opening end, the first opening end and the second opening end are respectively located at two ends of the shell, and the second elastic sheet is provided at the second opening end; The vibrator assembly includes at least two magnets and a magnetic conductive plate connected between two adjacent magnets, the two adjacent magnets are arranged opposite to each other with the same poles, and the stator assembly includes at least one coil surrounding the outer circumference of the magnetic conductive plate.
15. The bone conduction earphone according to any one of claims 1 to 11, characterized in that: It also includes an ear hook, which is connected to the headphone headshell and is used to hang on the ear; When the bone conduction earphone is worn on a human head, the sound outlet is arranged opposite to the ear canal.