A bone conduction headset

Abstract

The present application mainly relates to a bone conduction headset, wherein the ear hook assembly includes an ear hook shell, the movement module includes a movement shell, a movement and a cover plate, one end of the movement shell is open, and the cover plate is arranged on the open end of the movement shell to form a cavity structure for accommodating the movement. The bone conduction headset provided by the present application uses a cover plate instead of an ear hook shell to connect with the movement shell, and the elastic modulus of the movement shell is greater than the elastic modulus of the ear hook shell, and the elastic modulus of the cover plate is greater than the elastic modulus of the ear hook shell, so as to increase the rigidity of the related structure located at the open end of the movement shell, so as to ensure that the movement shell has a sufficiently large rigidity so that its resonant frequency is located in the high frequency zone as high as possible, and also to reduce the rigidity difference between the related structure located at the open end of the movement shell and the movement shell to increase the resonant frequency of the structure, and improve the sound leakage of the bone conduction headset.

Description

Technical Field

[0001] The present application relates to the technical field of bone conduction, and in particular to a bone conduction headset. Background Art

[0002] Bone conduction is a sound conduction method that converts electrical signals into mechanical vibrations, and transmits the mechanical vibrations through the human skull, bony labyrinth, inner ear lymph, spiral organ, auditory nerve, and cerebral cortex auditory center to achieve the transmission of sound waves. Bone conduction headphones use bone conduction technology to receive the sound, close to the skull, and sound waves can be directly transmitted to the auditory nerve through the bones without passing through the external auditory canal and eardrum, which can "liberate" the ears. Summary of the invention

[0003] An embodiment of the present application provides a bone conduction headset, wherein the bone conduction headset includes an ear hook assembly and a movement module, the movement module is arranged at one end of the ear hook assembly, the ear hook assembly includes an ear hook shell, the movement module includes a movement shell, a movement and a cover plate, one end of the movement shell is open, the cover plate is covered on the open end of the movement shell to form a cavity structure for accommodating the movement, and the ear hook shell is connected to the cover plate; wherein the elastic modulus of the movement shell is greater than the elastic modulus of the ear hook shell, and the elastic modulus of the cover plate is greater than the elastic modulus of the ear hook shell.

[0004] The beneficial effect of the present application is that the bone conduction earphones provided by the present application use a cover plate instead of an ear hook shell to be connected to a movement shell, and the elastic modulus of the movement shell is greater than the elastic modulus of the ear hook shell, and the elastic modulus of the cover plate is greater than the elastic modulus of the ear hook shell, so as to increase the stiffness of the related structure located at the opening end of the movement shell, thereby ensuring that the movement shell has sufficiently large stiffness so that its resonant frequency is located in the high-frequency zone as high as possible, and also reducing the stiffness difference between the related structure located at the opening end of the movement shell and the movement shell to increase the resonant frequency of the structure, and improve the sound leakage of the bone conduction earphones. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0006] Figure 1 It is a schematic diagram of the exploded structure of an embodiment of a bone conduction headset provided by the present application;

[0007] Figure 2 yes Figure 1 A schematic diagram of the exploded structure of an embodiment of a middle ear hook assembly;

[0008] Figure 3 yes Figure 2 A schematic diagram of the structure of the middle ear hook shell;

[0009] Figure 4 yes Figure 1 A schematic diagram of the exploded structure of another embodiment of the middle ear hook assembly;

[0010] Figure 5 yes Figure 4 A schematic diagram of the structure of the middle ear hook shell;

[0011] Figure 6 yes Figure 4 A schematic diagram of the structure of the middle decorative bracket close to the ear hook housing;

[0012] Figure 7 yes Figure 4 Schematic diagram of the principle of the trigger button of the middle decorative bracket;

[0013] Figure 8 yes Figure 1 A schematic diagram of the exploded structure of an embodiment of a middle movement module;

[0014] Fig. 9 is a frequency response curve of the bone conduction earphone according to an embodiment of the present application;

[0015] Fig.10 yes Figure 8 A schematic cross-sectional view of an embodiment of a reinforcement structure provided on a middle ear hook shell;

[0016] Fig.11 yes Figure 8 A schematic diagram of a top view of another embodiment of a reinforcement structure provided on the middle ear hook shell;

[0017] Fig.12 yes Fig.10 and Fig.11 Frequency response curves corresponding to various reinforcement structures;

[0018] Fig.13 yes Figure 8 Schematic diagram of the cross-sectional structure along direction II after the middle movement module is assembled;

[0019] Fig.14 yes Figure 8 A schematic structural diagram of an implementation scheme of a middle movement bracket;

[0020] Fig.15 yes Figure 8 Schematic diagram of the top view of the central movement module after assembly;

[0021] Fig.16 yes Figure 1 A schematic diagram of the exploded structure of another embodiment of the middle movement module;

[0022] Fig.17 yes Fig.14 Frequency response curves of structures corresponding to different types of colloids arranged between the middle ear hook assembly and the cover plate;

[0023] Fig.18 yes Fig.16 Schematic diagram of the cross-sectional structure along the II-II direction after the middle movement module is assembled;

[0024] Fig.19 yes Fig.16 A schematic diagram of the structure of the middle cover plate close to the movement housing;

[0025] Fig. 20 yes Fig.19 A schematic diagram of the top view of the structure of the middle cover;

[0026] Fig.21 yes Fig.16 Schematic diagram of the exploded structure of the central movement module from another perspective;

[0027] Fig. 22 yes Fig.21 A schematic diagram of the top view of the structure of the middle cover;

[0028] Fig.23 It is a schematic diagram of the principle of the movement in the embodiment of the present application;

[0029] Fig.24 yes Fig.23 Schematic diagram of the relationship between the magnet and the force coefficient BL;

[0030] Fig.25 yes Fig.23 Schematic diagram of the relationship between the thickness of the magnetic shield and the magnetic plate and the force coefficient BL;

[0031] Fig.26 yes Fig.23 Schematic diagram of the relationship between the height of the medium magnetic shield and the force coefficient BL;

[0032] Fig. 27 yes Figure 1 Schematic diagram of the bone conduction headset when not being worn;

[0033] Fig.28 yes Figure 1 Schematic diagram of the cross-sectional structure of the mid-rear suspension assembly along the III-III direction. DETAILED DESCRIPTION

[0034] The present application is further described in detail below in conjunction with the accompanying drawings and examples. It is particularly noted that the following examples are only used to illustrate the present application, but are not intended to limit the scope of the present application. Similarly, the following examples are only some examples of the present application rather than all examples, and all other examples obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0035] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of this application. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0036] like Figures 1 to 5 As shown, the bone conduction earphone 10 may include two core modules 20, two ear hook components 30, a rear hanging component 40, a main control circuit board 50 and a battery 60. Among them, one end of the two ear hook components 30 is respectively connected to the corresponding core module 20, and the two ends of the rear hanging component 40 are respectively connected to the other end of the two ear hook components 30 away from the core module 20. Further, the two ear hook components 30 are used to be hung on the outside of the two ears of the user, and the rear hanging component 40 is used to be wrapped around the back of the user's head, so as to meet the needs of the user to wear the bone conduction earphone 10. In this way, when the bone conduction earphone 10 is in the wearing state, the two core modules 20 are respectively located on the left and right sides of the user's head; and under the cooperation of the two ear hook components 30 and the rear hanging component 40, the two core modules 20 can clamp the user's head and contact with the user's skin, thereby realizing the transmission of sound based on bone conduction technology.

[0037] Furthermore, the main control circuit board 50 and the battery 60 can be arranged in the same ear hook component 30; or they can be arranged in two ear hook components 30 respectively. The specific structure will be described in detail later. Among them, the main control circuit board 50 and the battery 60 can be connected through a conductor ( Figures 1 to 5 The former can be used to control the sound of the movement module 20 (mainly converting electrical signals into mechanical vibrations), and the latter can be used to provide power to the bone conduction earphone 10 (specifically, the two movement modules 20). Of course, the bone conduction earphone 10 described in the present application can also include microphones such as microphones and pickups, and communication elements such as Bluetooth, which can also be connected to the main control circuit board 50 and the battery 60 through wires to achieve corresponding functions.

[0038] It should be noted that: the movement modules 20 described in the present application are provided with two, and both movement modules 20 can make sounds, mainly to facilitate the bone conduction headset 10 to achieve stereo sound effects, thereby improving the user favorability of the bone conduction headset 10. Therefore, in other application scenarios where the requirements for stereo are not particularly high, such as hearing aids for hearing patients, live prompting by hosts, etc., the bone conduction headset 10 can also be provided with only one movement module 20. Furthermore, for the above-mentioned conductor, it can be a wire, which is mainly used to achieve electrical connection between the various electronic components of the bone conduction headset 10; if there are multiple circuits that need to be electrically connected, the conductor can be set to multiple strands accordingly, and then the above-mentioned conductor can be simply understood as a multi-strand wire.

[0039] like Figure 2 As shown, the ear hook assembly 30 may include an ear hook shell 31 and a decorative piece 32, and the two may be connected by one or a combination of assembly methods such as gluing, clamping, and threading. Wherein, the decorative piece 32 is located on the side of the ear hook shell 31 away from the movement module 20 when the bone conduction earphone 10 is in the wearing state, that is, located on the outside of the bone conduction earphone 10, so that the decorative piece 32 can decorate the ear hook shell 31, thereby increasing the aesthetic appearance of the bone conduction earphone 10. At this time, the decorative piece 32 may protrude from the ear hook shell 31, or may be embedded in the ear hook shell 31. Further, the decorative piece 32 may be, but is not limited to, a sticker, a plastic part, a metal part, etc., on which geometric patterns, cartoon patterns, logo patterns, etc. may be printed, and fluorescent materials, reflective materials, etc. may also be coated to achieve corresponding decorative effects.

[0040] like Figure 2 and Figure 3 As shown, the ear hook shell 31 may include an earphone fixing portion 311, a bending transition portion 312 and a storage compartment 313 connected in sequence. Among them, the earphone fixing portion 311 is used to fix the movement module 20, and the matching relationship between the two will be described in detail later. The bending transition portion 312 connects the storage compartment 313 and the earphone fixing portion 311, and is arranged in a bending shape to be hung on the outside of the human ear. Furthermore, one end of the storage compartment 313 away from the earphone fixing portion 311 can be connected to the rear hanging component 40 by one or a combination of assembly methods such as gluing, clamping, and threaded connection, so as to facilitate the assembly between the ear hook component 30 and the rear hanging component 40. Among them, one end of the storage compartment 313 is open to accommodate the main control circuit board 50 or the battery 60. At this time, the ear hook shell 31 may also include a compartment cover 314, and the compartment cover 314 is covered on the open end of the storage compartment 313.

[0041] Furthermore, when the accommodating chamber 313 is mainly used to accommodate the main control circuit board 50, Figure 2As shown, the ear hook assembly 30 may further include a control key 33 and a TYPE-C (USB) interface 34. Specifically, the control key 33 and the TYPE-C (USB) interface 34 may be arranged on the storage compartment 313, so that the two can be connected to the main control circuit board 50, thereby shortening the wiring distance. At this time, the control key 33 and the TYPE-C (USB) interface 34 may be partially exposed outside the ear hook shell 31, so that the user can perform corresponding operations. With such a configuration, the control key 33 can be used to realize functions such as turning the bone conduction earphone 10 on and off, adjusting the volume, and the TYPE-C (USB) interface 34 can be used to realize functions such as data transmission and charging. In addition, the ear hook assembly 30 may further include an indicator light 35. Specifically, the indicator light 35 may be arranged on the storage compartment 313, so that the two can be connected to the main control circuit board 50, thereby shortening the wiring distance. At this time, the indicator light 35 may be partially exposed outside the ear hook shell 31, such as Figure 2 It may also specifically include an LED light source hidden in the ear hook housing 31 and a light guide member ( Figure 2 and Figure 3 With this arrangement, the indicator light 35 can provide prompts when the bone conduction headset 10 is being charged or the battery is low.

[0042] It should be noted that when the bone conduction earphone 10 is in the wearing state, the bone conduction earphone 10 will be hung on the outside of the human ear. Specifically, the movement module 20 is generally located on the front side of the human ear, and the main control circuit board 50 or the battery 60 is generally located on the back side of the human ear. At this time, the human ear serves as a fulcrum to support the bone conduction earphone 10, causing the human ear to bear most of the weight of the bone conduction earphone 10. After the user wears the bone conduction earphone 10 for a long time, it may cause discomfort. For this reason, the ear hook shell 31 (especially the bending transition part 312) is generally made of a softer material to improve the wearing comfort of the bone conduction earphone 10. The material of the ear hook shell 31 may be, but is not limited to, polycarbonate (PC), polyamides (PA), acrylonitrile butadiene styrene (ABS), polystyrene (PS), high impact polystyrene (HIPS), polypropylene (PP), polyethylene terephthalate (PET), polyvinyl chloride (PVC), polyurethanes (PU), polyethylene (PE), phenolic resin (PF), urea-formaldehyde resin (UF), melamine-formaldehyde resin (MF), silicone, etc. Furthermore, due to the soft texture of the ear hook shell 31, the ear hook shell 31 has insufficient rigidity and is difficult to maintain its structure under the action of external force, and even has the risk of being broken due to insufficient strength. To this end, the ear hook housing 31 may have an elastic metal wire (at least in the bending transition portion 312) built therein. Figure 3 (not shown) in order to improve the strength of the ear hook shell 31, thereby increasing the reliability of the ear hook shell 31. Among them, the material of the elastic metal wire can be but is not limited to spring steel, titanium alloy, titanium nickel alloy, chrome molybdenum steel, etc. At this time, the ear hook shell 31 can be a metal insert injection molded integrally molded structural part.

[0043] Based on the above detailed description, since the movement module 20 is arranged at one end of the ear hook assembly 30 (specifically, it can be the end where the earphone fixing part 311 is located), and the main control circuit board 50 or the battery 60 is arranged at the other end of the ear hook assembly 30 (specifically, it can be the other end where the accommodating compartment 313 is located), when the movement module 20 is connected to the main control circuit board 50 and the battery 60 through a wire, the wire must at least pass through the area where the bending transition part 312 is located. Generally, for the aesthetic appearance of the bone conduction earphone 10, the wire will not be exposed outside the ear hook shell 31, but will be inserted into the ear hook shell 31, so that at least the bending transition part 312 covers the wire. However, since the texture of the wire is generally softer, it is more difficult to insert the wire into the ear hook shell 31. For this reason, in this embodiment, if Figures 2 to 5 As shown, the ear hook housing 31 is provided with a first groove 315 at least on the bending transition portion 312, and the first groove 315 can be used for wiring to reduce the difficulty of inserting the wire in the ear hook housing 31. The first groove 315 can be specifically arranged on a side of the ear hook housing 31 close to the decorative bracket 321. At this time, the decorative element 32 can be embedded and fixed in the first groove 315 corresponding to the bending transition portion 312 to form a wiring channel ( Figure 2 and Figure 4 The first groove 315 is not marked in the figure), thereby allowing the wire to extend from the movement module 20 through the wiring channel to the storage compartment 313, so that the wire can connect the movement module 20 with the main control circuit board 50 and the battery 60. In this way, when the wire passes through the first groove 315 and is arranged in the ear hook shell 31, the decorative part 32 can cover the wire to prevent the wire from being exposed outside the ear hook shell 31. At this time, the decorative part 32 can not only decorate the ear hook shell 31, but also shield the wire, so that the decorative part 32 can achieve "one piece and two uses".

[0044] like Figure 2 As shown, the decorative member 32 may include a decorative bracket 321 and a decorative strip 322. The decorative bracket 321 is arranged in a bent shape corresponding to the bending transition portion 312, so that when the decorative bracket 321 is embedded in and fixed to the first groove 315 corresponding to the bending transition portion 312, the decorative bracket 321 cooperates with the first groove 315 on the bending transition portion 312 to form a wiring channel, so as to allow the wire to extend from the movement module 20 through the wiring channel to the accommodating compartment 313. Further, the decorative strip 322 is embedded in the first groove 315 and is fitted and fixed with the decorative bracket 321. At this time, the decorative bracket 321 can be a plastic part, and can be assembled with the ear hook housing 31 by gluing and / or clamping. The decorative strip 322 can be a sticker, and can be attached to the decorative bracket 321 by gluing. With such a configuration, when the user wants to change the decorative effect of the decorative member 32, the user can replace the decorative strip 322 without removing the decorative member 32 as a whole from the ear hook housing 31. Of course, in some other embodiments, such as Figure 6 As shown, the decorative bracket 321 may further be provided with a second groove 3211 on the side facing the ear hook shell 31, so that when the decorative bracket 321 is embedded in and fixed in the first groove 315, the second groove 3211 and the first groove 315 cooperate with each other to form a wiring channel.

[0045] Furthermore, a concave pit 316 may be provided at the bottom of the first groove 315 near the end of the decorative strip 322, so that the end of the decorative strip 322 can be lifted from the first groove 315 by pressing the decorative strip 322 into the concave pit 316, so as to facilitate the replacement of the decorative strip 322. At this time, the first groove 315 can be further extended to the accommodating bin 313, and the concave pit 316 can be provided on the accommodating bin 313. The concave pit 316 is located outside the covering area of ​​the decorative bracket 321 on the first groove 315, and the decorative strip 322 is fitted and fixed on the decorative bracket 321 and covers the concave pit 316. At this time, the overall length of the decorative strip 322 can be greater than the overall length of the decorative bracket 321.

[0046] It should be noted that the decorative bracket 321 and the decorative strip 322 can also be an integrally formed structural member. The material of the decorative bracket 321 and the material of the decorative strip 322 can be different, and the two can be double-color injection molded, so that the decorative bracket 321 can play a supporting role and the decorative strip 322 can play a decorative role. In this case, the overall length of the decorative strip 322 can be greater than or equal to the overall length of the decorative bracket 321.

[0047] like Figure 3 As shown, the first groove 315 can be divided into a first sub-groove section 3151 located on the bending transition portion 312, a second sub-groove section 3152 located on the earphone fixing portion 311, and a third sub-groove section 3153 located on the accommodating compartment 313. Among them, the depth of the first sub-groove section 3151 is greater than the depth of the second sub-groove section 3152 and the third sub-groove section 3153, so that the first sub-groove section 3151 is mainly used to accommodate the decorative bracket 321 and realize the wiring, while the second sub-groove section 3152 and the third sub-groove section 3153 are mainly used to accommodate the decorative strip 322. In other words, the decorative strip 322 can be further extended into the second sub-groove section 3152 and the third sub-groove section 3153 in addition to being located in the first sub-groove section 3151. At this time, the pit 316 can be set in the third sub-groove section 3153. Furthermore, the depth of the second sub-groove section 3152 can be equal to the depth of the third sub-groove section 3153, and after the decorative bracket 321 is embedded in and fixed in the first sub-groove section 3151, the side of the decorative bracket 321 facing away from the ear hook shell 31 can be roughly flush with the bottom of the second sub-groove section 3152 and the third sub-groove section 3153, so that the decorative strip 322 can be flatly attached to the earphone fixing part 311, the decorative bracket 321 and the accommodating compartment 313.

[0048] Further, the fitting strength between the decorative strip 322 and the decorative bracket 321 may be less than the fixing strength between the decorative bracket 321 and the bending transition portion 312. Specifically, when the decorative strip 322 is glued to the decorative bracket 321, the fitting strength may refer to the bonding strength between the two. At this time, the magnitude of the fitting strength may mainly depend on the roughness of the surface where the decorative bracket 321 and the decorative strip 322 are bonded; and / or the amount (and / or viscosity) of the colloid between the decorative strip 322 and the decorative bracket 321. Further, when the decorative bracket 321 is clamped to the bending transition portion 312, the fixing strength may refer to the clamping strength between the two. At this time, the fixing strength may mainly depend on the fitting clearance between the decorative bracket 321 and the bending transition portion 312; and / or the depth of the clamping between the two. With such arrangement, when the decorative bracket 321 and the ear hook shell 31 are mainly assembled in a snap-fit ​​manner, the two ends of the decorative strip 322 can be respectively glued to the accommodating compartment 313 and the earphone fixing portion 311, which can further fix the decorative bracket 321. When the decorative strip 322 is replaced to change the decorative effect of the decorative part 32, the decorative bracket 321 will not be lifted up due to the excessive strength of the fit between it and the decorative strip 322.

[0049] It should be noted that: Figure 2 The housing compartment 313 is mainly used to accommodate the main control circuit board 50. Figure 4 The storage compartment 313 shown can be mainly used to accommodate the battery 60. Figure 2 The ear hook assembly 30 shown corresponds to the left ear hook of the bone conduction headset 10. Figure 4 The ear hook assembly 30 shown may correspond to the right ear hook of the bone conduction headset 10; Figure 2 The ear hook assembly 30 shown corresponds to the right ear hook of the bone conduction headset 10. Figure 4 The ear hook assembly 30 shown may correspond to the left ear hook of the bone conduction earphone 10. In other words, the main control circuit board 50 and the battery 60 may be respectively arranged in the two ear hook assemblies 30. Such an arrangement can not only increase the capacity of the battery 60 to improve the endurance of the bone conduction earphone 10, but also balance the weight of the bone conduction earphone 10 to improve the wearing comfort of the bone conduction earphone 10. At this time, the main control circuit board 50 and the battery 60 may be connected via a wire built into the rear cover assembly 40, and the specific structure will be described in detail later.

[0050] like Figure 4As shown, the ear hook assembly 30 may also include a button 36, and the ear hook shell 31 is also provided with a button adapter hole 317. Among them, the decorative bracket 321 is assembled and fixed on one side of the ear hook shell 31, and the button 36 is arranged on the other side of the ear hook shell 31 away from the decorative bracket 321, and is exposed through the button adapter hole 317; the decorative bracket 321 further extends in a cantilever form to the top of the button 36 exposed through the button adapter hole 317, and can trigger the button 36 under external force. In this way, the button 36 can replace the above-mentioned control button 33 to simplify the structure of the bone conduction headset 10; it can also coexist with the above-mentioned control button 33, and can be used to implement functions such as play / pause and AI wake-up to expand the interactive capabilities of the bone conduction headset 10.

[0051] Furthermore, the button adapter hole 317 can be provided in the earphone fixing part 311, so that the user can press the button 36 in the earphone fixing part 311. At this time, the ear hook assembly 30 can also include a seal 37, and the seal 37 is arranged between the button 36 and the earphone fixing part 311. The material of the seal 37 can be but not limited to silicone, rubber, etc. Such a setting can not only increase the waterproof performance of the earphone fixing part 311 in the area where the button 36 is located, but also improve the pressing touch of the button 36.

[0052] Similarly, when the core module 20 is arranged at one end of the ear hook assembly 30 (specifically, the end where the earphone fixing portion 311 is located), and the battery 60 is arranged at the other end of the ear hook assembly 30 (specifically, the other end where the accommodating compartment 313 is located), the wire must at least pass through the area where the bending transition portion 312 is located, so that the core module 20 is connected to the battery 60 through the wire. Figure 4 As shown, the ear hook housing 31 is provided with a first groove 315 at least on one side of the earphone fixing portion 311 and the bending transition portion 312 close to the decorative bracket 321. The first groove 315 can be used for wiring to reduce the difficulty of inserting the wire into the ear hook housing 31. Furthermore, one end of the first groove 315 is connected to the button adapter hole 317, so that when the decorative bracket 321 is embedded and fixed in the first groove 315, the decorative bracket 321 can also cover the button adapter hole 317 to facilitate triggering the button 36.

[0053] Through the above-mentioned method, the decorative piece 32 can not only decorate the ear hook shell 31 and shield the wires, but also shield and trigger the button 36, so that the decorative piece 32 can achieve "one piece, four uses".

[0054] like Figure 5As shown, the first groove 315 can be divided into a first sub-groove section 3151 located on the bending transition portion 312 and a second sub-groove section 3152 located on the earphone fixing portion 311. Among them, the depth of the first sub-groove section 3151 is greater than the depth of the second sub-groove section 3152, so that the first sub-groove section 3151 is mainly used to realize wiring, and the second sub-groove section 3152 and the first sub-groove section 3151 are used together to accommodate the decorative bracket 321. At this time, the button adapter hole 317 can be set in the second sub-groove section 3152, that is, the projections of the two on the earphone fixing portion 311 at least partially overlap. Further, the first groove 315 can also be divided into a third sub-groove section 3153 located on the accommodating compartment 313, and the third sub-groove section 3153 can also be provided with a pit 316. Among them, the depth of the second sub-groove section 3152 can be greater than the depth of the third sub-groove section 3153, so that the third sub-groove section 3153 is mainly used to accommodate the decorative strip 322. In other words, in addition to being located in the first sub-slot section 3151 and the second sub-slot section 3152, the decorative strip 322 can also be further extended into the third sub-slot section 3153. At this time, after the decorative bracket 321 is embedded in and fixed to the first sub-slot section 3151, the side of the decorative bracket 321 facing away from the ear hook housing 31 can be substantially flush with the bottom of the third sub-slot section 3153, so that the decorative strip 322 can be flatly attached to the earphone fixing portion 311, the decorative bracket 321 and the accommodating compartment 313; and the decorative bracket 321 can form a cantilever at the second sub-slot section 3152 corresponding to the button adapter hole 317.

[0055] like Figure 6 As shown, the decorative bracket 321 may include a fixing portion 3212 corresponding to the first sub-slot segment 3151 and a pressing portion 3213 corresponding to the second sub-slot segment 3152. The thickness of the fixing portion 3212 is greater than the thickness of the pressing portion 3213, so that the fixing portion 3212 is mainly used to realize the assembly between the decorative bracket 321 and the ear hook housing 31, and the pressing portion 3213 is mainly used to trigger the button 36. Further, when the decorative bracket 321 is provided with a second groove 3211 on the side facing the ear hook housing 31, the second groove 3211 may be provided on the fixing portion 3212.

[0056] like Figure 6 and Figure 7As shown, the decorative bracket 321 may also include a connecting portion 3214 connected between the fixing portion 3212 and the pressing portion 3213. Among them, the connecting portion 3214 is bent and extended to a side away from the ear hook shell 31 compared to the fixing portion 3212, and the pressing portion 3213 is bent and extended to a side close to the ear hook shell 31 compared to the connecting portion 3214. At this time, the connecting portion 3214 makes the pressing portion 3213 suspended relative to the fixing portion 3212, and there is a certain distance between the pressing portion 3213 and the fixing portion 3212. Among them, the distance can be greater than or equal to the trigger stroke of the button 36. Such a configuration can effectively improve the problem that when the user presses one end of the decorative bracket 321 (specifically, it can be the end where the pressing portion 3213 is located), the other end of the decorative bracket 321 is tilted.

[0057] Furthermore, a button protrusion 3215 may be provided on one side of the pressing portion 3213 close to the ear hook housing 31, so that when the pressing portion 3213 is pressed by an external force, the button protrusion 3215 can trigger the button 36. The projections of the button protrusion 3215 and the button 36 on the headset fixing portion 311 at least partially overlap, and the effective area of ​​the button protrusion 3215 in contact with the button 36 is smaller than the effective area of ​​the button protrusion 3215 in contact with the button 36. This arrangement can reduce the difficulty of triggering the button 36; especially when a seal 37 is provided between the button 36 and the headset fixing portion 311, because the button 36 needs to be deformed first when the seal 37 is triggered. Based on the relationship F∝ε·S, when the external force F applied by the user is the same, the smaller the effective area S of the area where the seal 37 needs to be deformed, the larger the deformation ε of the seal 37 is, and the easier it is to trigger the button 36. Obviously, compared with the pressing portion 3213, the button protrusion 3215 can reduce the above-mentioned effective area.

[0058] Furthermore, the decorative bracket 321 may be provided with a stopper 3216 at the end close to the earphone fixing portion 311. The stopper 3216 is used to form a stopper with the inner surface of the earphone fixing portion 311 away from the decorative bracket 321 to prevent the end of the decorative bracket 321 from tilting from the first groove 315, especially under the action of external force. Figure 7 As shown, the stopper 3216 can be specifically arranged at one end of the pressing portion 3213 away from the fixing portion 3212. At this time, due to the stopping effect between the stopper 3216 and the earphone fixing portion 311, after the decorative bracket 321 is deformed under the external force and the button 36 is triggered, the decorative bracket 321 will not be tilted due to excessive elastic recovery.

[0059] See again Figure 2 or Figure 6The decorative bracket 321 may also be provided with a lap portion 3217 at one end close to the accommodating compartment 313 (that is, the other end away from the pressing portion 3213). The thickness of the lap portion 3217 is less than that of the fixing portion 3212, so as to structurally avoid the reinforcing structure of the ear hook housing 31 (specifically located between the bending transition portion 312 and the accommodating compartment 313).

[0060] like Figure 8 As shown, the movement module 20 may include a movement shell 21 and a movement 22. Among them, one end of the movement shell 21 is open, and the ear hook shell 31 (specifically, it can be an earphone fixing part 311) is covered on the open end of the movement shell 21 to form a cavity structure for accommodating the movement 22. At this time, the ear hook shell 31 is equivalent to a cover of the movement shell 21. In this way, compared with the plug-in assembly method of the ear hook structure and the movement structure in the related art, the cover assembly method of the ear hook shell 31 and the movement shell 21 in the embodiment of the present application can improve the stress problem of the ear hook structure and the movement structure at the plug-in point in the related art, thereby increasing the reliability of the bone conduction earphone 10.

[0061] It should be noted that: Figure 8 The ear hook shell is illustrated in the figure, mainly to facilitate the description of the relative position relationship between the ear hook shell and the movement shell, and then implicitly illustrate a possible assembly method between the ear hook shell and the movement shell.

[0062] Furthermore, the movement 22 can be directly or indirectly fixed in the movement housing 21, so that the movement 22 vibrates under the excitation of the electrical signal and drives the movement housing 21 to vibrate. When the user wears the bone conduction earphone 10, the skin contact area of ​​the movement housing 21 (that is, the bottom wall 211 described later) can contact the user's skin, so that the above-mentioned vibration can be transmitted to the auditory nerve through the human skull, and then the user can hear the sound played by the bone conduction earphone 10. In the embodiment of the present application, the movement module 20 can also include a movement bracket 23, which is used to fix the movement 22 in the movement housing 21.

[0063] Generally speaking, low frequency refers to sounds with a frequency less than 500 Hz, medium frequency refers to sounds with a frequency range of 500-4000 Hz, and high frequency refers to sounds with a frequency greater than 4000 Hz. Fig. 9As shown, the horizontal axis is the frequency of vibration (in Hz), and the vertical axis is the intensity of vibration (in dB); the high frequency area (frequency range greater than 4000 Hz) has a first high frequency valley V, a first high frequency peak P1, and a second high frequency peak P2. Among them, the first high frequency valley V and the first high frequency peak P1 can be generated by the deformation of the non-skin contact area of ​​the movement housing 21 (that is, the annular peripheral wall 212 described later) at high frequency, and the second high frequency peak P2 can be generated by the deformation of the skin contact area of ​​the movement housing 21 at high frequency. Generally, the frequency response curve within the frequency range of 500-6000 Hz is particularly critical for bone conduction headphones. Among them, in this frequency range, sharp peaks and valleys are not desired; the flatter the frequency response curve, the better the sound quality of the bone conduction headphones. Generally, the greater the stiffness, the smaller the deformation generated when the structure is subjected to force, and it is also conducive to the generation of higher frequency resonance. Therefore, in most cases, product manufacturers will increase the stiffness of the movement housing 21 to move the first high frequency valley V, the first high frequency peak P1, and the second high frequency peak P2 to a higher frequency area. In other words, in order to obtain better sound quality, the rigidity of the movement housing 21 can be as large as possible. To this end, in the embodiment of the present application, the material of the movement housing 21 can be but not limited to a mixture of materials such as polycarbonate, polyamide, acrylonitrile-butadiene-styrene copolymer and glass fiber or carbon fiber. In some embodiments, the material of the movement housing 21 can be a mixture of carbon fiber and polycarbonate in a certain proportion, or a mixture of glass fiber and polycarbonate in a certain proportion, or a mixture of glass fiber and polyamide in a certain proportion. In some other embodiments, the material of the movement housing 21 can be a mixture of carbon fiber, glass fiber and polycarbonate in a certain proportion. Among them, adding different proportions of carbon fiber and / or glass fiber, the elastic modulus of the material is different, and the rigidity of the obtained movement housing 21 is also different. For example, adding 20%-50% of glass fiber to polycarbonate, the elastic modulus of the material can reach 6-8GPa.

[0064] Based on the above detailed description, on the one hand, the ear hook shell 31 (especially the earphone fixing part 311) is a part of the structure of the movement module 20 to form a cavity structure for accommodating the movement 22; on the other hand, in the embodiment of the present application, in order to improve the wearing comfort of the bone conduction earphone 10, the ear hook shell 31 is generally made of a softer material, so that the rigidity of the ear hook shell 31 is relatively small. In this way, when the ear hook shell 31 is covered on the movement shell 21 to form a cavity structure for accommodating the movement 22, since the rigidity of the ear hook shell 31 (especially the earphone fixing part 311) is less than that of the movement shell 21, the bone conduction earphone is prone to the undesirable phenomenon of sound leakage, which in turn affects the user's favorability.

[0065] Generally speaking, the resonant frequency of a structure is related to the stiffness of the structure; and under the same mass, the greater the stiffness of the structure, the higher its resonant frequency. Among them, the stiffness K of the structure is related to factors such as its material (specifically expressed as elastic modulus) and specific structural form. Generally speaking, the greater the elastic modulus E of the material, the greater the stiffness K of the structure; the greater the thickness t of the structure, the greater the stiffness K of the structure; the smaller the area S of the structure, the greater the stiffness K of the structure. At this point, the above relationship can be simply described by the relationship K∝(E·t) / S. Therefore, one or a combination of methods such as increasing the elastic modulus E of the material, increasing the thickness t of the structure, and reducing the area S of the structure can increase the stiffness K of the structure, thereby increasing the resonant frequency of the structure.

[0066] In the embodiment of the present application, the ear hook shell 31 is generally made of a softer material (that is, a material with a smaller elastic modulus, such as polycarbonate, polyamide, etc., whose elastic modulus is mostly 2-3GPa), while the movement shell 21 is generally made of a harder material (that is, a material with a larger elastic modulus, such as adding 20%-50% glass fiber to polycarbonate, the elastic modulus of the material can reach 6-8GPa, etc.). Obviously, due to the difference in elastic modulus, the stiffness of the ear hook shell 31 is inconsistent with the stiffness of the movement shell 21, and the above-mentioned sound leakage is prone to occur. In addition, after the ear hook shell 31 is connected to the movement shell 21, due to the inconsistent stiffness of the two, it is easy for the structure to resonate at a relatively low frequency. To this end, in this embodiment, when the elastic modulus of the movement housing 21 is greater than the elastic modulus of the ear hook housing 31, the earphone fixing portion 311 is provided with a reinforcement structure 318, which can make the ratio of the difference between the stiffness K1 of the skin contact area of ​​the movement housing 21 and the stiffness K2 of the earphone fixing portion 311 to the stiffness K1 of the skin contact area of ​​the movement housing 21 less than or equal to 10%. That is, (K1-K2) / K1≤10%, or K2 / K1≥90%. Such a setting can ensure that the movement housing 21 has a sufficiently large stiffness so that its resonant frequency is located in the high frequency region as high as possible, and can also reduce the stiffness difference between the earphone fixing portion 311 and the movement housing 21 to increase the resonant frequency of the structure and improve the above-mentioned sound leakage.

[0067] In some embodiments, Fig.10As shown, the movement housing 21 may include a bottom wall 211 and an annular circumferential wall 212. The bottom wall 211 is the skin contact area of ​​the movement housing 21, and one end of the annular circumferential wall 212 is integrally connected to the bottom wall 211. In other words, the bottom wall 211 is used to contact the user's skin. Further, the earphone fixing portion 311 may include a fixed body 3111 connected to the bending transition portion 312 and an annular flange 3112 integrally connected to the fixed body 3111 and extending toward the movement housing 21. The annular flange 3112 and the other end of the annular circumferential wall 212 away from the bottom wall 211 are butted against each other, and the two can be connected by gluing or a combination of gluing and snapping.

[0068] It should be noted that: in the embodiment of the present application, the bottom wall 211 can be rectangular, square, circular, elliptical, or quasi-elliptical (similar to Fig.11 The shape of the earphone fixing portion 311 shown in the figure is similar to any one of the shapes such as the annular circumferential wall 212 and the like. Furthermore, the annular circumferential wall 212 can be perpendicular to the bottom wall 211, that is, the area of ​​the opening end of the movement housing 21 is equal to the area of ​​the bottom wall 211; the annular circumferential wall 212 can also be inclined outwardly at an angle relative to the bottom wall 211 (for example, the inclination angle is less than or equal to 30°), that is, the area of ​​the opening end of the movement housing 21 is greater than the area of ​​the bottom wall 211. Among them, this embodiment is exemplified by taking the bottom wall 211 as an elliptical shape and the annular circumferential wall 212 as an example of being inclined outwardly at 10° relative to the bottom wall 211. With such a configuration, under the premise of ensuring a certain wearing comfort (because the bottom wall 211, as the skin contact area of ​​the movement housing 21, will contact the user's skin, and its area should not be too small), the area of ​​the bottom wall 211 is reduced, and the resonance frequency of the movement housing 21 can be increased.

[0069] like Fig.10 As shown in (a), the reinforcement structure 318 may be an arc-shaped structure arranged between the fixed body 3111 and the annular flange 3112, that is, a chamfering process is performed. Furthermore, since the dimension of the annular flange 3112 in the thickness direction of the earphone fixing part 311 is generally small, the annular flange 3112 and the above-mentioned arc-shaped structure can be integrated. At this time, for the earphone fixing part 311, its structure may only include the fixed body 3111 and the arc-shaped reinforcement structure 318. In this way, the above-mentioned arc-shaped structure reduces the effective area of ​​the earphone fixing part 311, which can increase the rigidity of the earphone fixing part 311, and then reduce the rigidity difference between the earphone fixing part 311 and the movement shell 21. It should be noted that the size of the above-mentioned arc-shaped structure can be reasonably designed according to the rigidity requirement of the earphone fixing part 311, and is not limited here.

[0070] like Fig.10As shown in (b), the reinforcement structure 318 can be a thickening layer integrally provided with the fixed body 3111, that is, a thickening treatment is performed. Among them, the material of the thickening layer can be the same as the material of the ear hook shell 31, for example, the material of the thickening layer is also any one of polycarbonate, polyamide, and acrylonitrile-butadiene-styrene copolymer. It should be noted that the reinforcement structure 318 can be located on the side of the fixed body 3111 close to the movement shell 21, or on the other side of the fixed body 3111 away from the movement shell 21, and of course, it can also be located on both sides of the fixed body 3111. Furthermore, since the dimension of the annular flange 3112 in the thickness direction of the earphone fixing part 311 is generally small, the annular flange 3112 and the above-mentioned thickening layer can be integrated. At this time, for the earphone fixing part 311, its structure can only include the fixed body 3111 and the reinforcement structure 318 provided with the thickening layer. In this way, the thickened layer increases the effective thickness of the earphone fixing portion 311, which can increase the rigidity of the earphone fixing portion 311, thereby reducing the rigidity difference between the earphone fixing portion 311 and the movement housing 21. It should be noted that the size of the thickened layer can be reasonably designed according to the rigidity requirements of the earphone fixing portion 311, and is not limited here.

[0071] In some other embodiments, the reinforcement structure 318 can be a metal part. The material of the metal part can be but not limited to aluminum alloy, magnesium alloy, titanium alloy, nickel alloy, chrome-molybdenum steel, stainless steel, etc. At this time, the reinforcement structure 318 and the earphone fixing part 311 can be a metal insert injection-molded integrally formed structural part. With such a configuration, the metal part can effectively increase the rigidity of the earphone fixing part 311, thereby reducing the rigidity difference between the earphone fixing part 311 and the movement housing 21. It should be noted that the material, size and other parameters of the above-mentioned metal parts can be reasonably designed according to the rigidity requirements of the earphone fixing part 311, and are not limited here.

[0072] In other embodiments, Fig.11 As shown, the reinforcement structure 318 may be a reinforcement rib disposed on the earphone fixing portion 311. The reinforcement rib is mainly distributed on one side of the earphone fixing portion 311 close to the movement housing 21. Further, the number of reinforcement ribs may be multiple, and the multiple reinforcement ribs may be arranged as follows: Fig.11 The side-by-side arrangement shown in (a) and (b) or the Fig.11 The plurality of reinforcing ribs may also be arranged in a grid-like manner with the preset reference point on the earphone fixing portion 311 as the center. Fig.11The radial arrangement shown in (d) in the figure. The material of the reinforcing ribs can be the same as the material of the ear hook shell 31, for example, the material of the reinforcing ribs is also any one of polycarbonate, polyamide, and acrylonitrile-butadiene-styrene copolymer. Compared with the methods of injection molding a metal part on the earphone fixing part 311 or directly thickening the earphone fixing part 311, the reinforcing ribs are arranged on the earphone fixing part 311, which can increase the rigidity of the earphone fixing part 311 while taking into account the weight of the earphone fixing part 311.

[0073] Furthermore, if Fig.11 As shown, the earphone fixing portion 311 may have a long axis direction (eg Fig.11 The direction indicated by the dotted line X) and a short axis direction (as shown in Fig.11 The size of the earphone fixing portion 311 along the long axis direction may be greater than the size along the short axis direction. The following is an exemplary description of the distribution of the reinforcing ribs:

[0074] like Fig.11 As shown in (a), a plurality of reinforcing ribs may be arranged in strips along the long axis and arranged side by side along the short axis. In this case, the reinforcing structure 318 may be simply regarded as a long-side reinforcement of the earphone fixing portion 311.

[0075] like Fig.11 As shown in (b), a plurality of reinforcing ribs may be arranged in strips along the short axis direction and arranged side by side along the long axis direction. In this case, the reinforcing structure 318 may be simply regarded as a short-side reinforcement of the earphone fixing portion 311.

[0076] like Fig.11 As shown in (c), a plurality of reinforcing ribs can be arranged along the long axis direction and the short axis direction to form a grid shape. In this case, the reinforcing structure 318 can be simply regarded as a cross reinforcement (Cross) of the earphone fixing part 311.

[0077] like Fig.11 As shown in (d), the ends of the multiple reinforcing ribs close to each other can be arranged at intervals, and the extension lines of the multiple reinforcing ribs can intersect at a preset reference point (such as Fig.11 At this time, the reinforcement structure 318 can be simply regarded as the radial reinforcement of the earphone fixing part 311.

[0078] After long-term research, the inventors of the present application have found that under the same conditions, when the following dimensional relationship is satisfied between the reinforcing rib and the earphone fixing portion 311, the rigidity of the earphone fixing portion 311 can be effectively increased, and the weight of the earphone fixing portion 311 can be well taken into account. Specifically, the ratio between the thickness of the reinforcing rib and the thickness of the earphone fixing portion 311 can be within the closed interval [0.8, 1.2], the ratio between the width of the reinforcing rib and the thickness of the earphone fixing portion 311 can be within the closed interval [0.4, 0.6], and the ratio between the spacing between the reinforcing ribs and the thickness of the earphone fixing portion 311 can be within the closed interval [1.6, 2.4]. Preferably, the thickness of the reinforcing rib can be the same as the thickness of the earphone fixing portion 311, the width of the reinforcing rib can be half the thickness of the earphone fixing portion 311, and the spacing between the reinforcing ribs can be twice the thickness of the earphone fixing portion 311. In this embodiment, the thickness of the earphone fixing portion 311 is 0.8 mm, and the thickness, width and spacing of the reinforcing ribs are 0.8 mm, 0.4 mm and 1.6 mm respectively.

[0079] It should be noted that: Fig.10 and Fig.11 The various reinforcement structures shown in the figure can be reasonably combined according to the stiffness requirements of the earphone fixing part 311, and are not limited here.

[0080] like Fig.12 As shown, the curve (A+B) can indicate that the material of the earphone fixing part 311 is different from the material of the core shell 21 (for example, the elastic modulus of the former is smaller than the elastic modulus of the latter), and the earphone fixing part 311 has not been improved in structure; the curve (B+B) can indicate that the material of the earphone fixing part 311 is the same as the material of the core shell 21 (for example, the elastic modulus of the two are equal), and the earphone fixing part 311 is similar to the core shell 21 in structure (for example, the thickness of the two is equal, and the area of ​​the earphone fixing part 311 is also equal to the area of ​​the bottom wall 211). Among them, A can correspond to the earphone fixing part 311, and B can correspond to the bottom wall 211 (that is, the skin contact area of ​​the core shell 21); (A+B) and (B+B) can correspond to the ear hook shell 31 (specifically, the earphone fixing part 311) covering the core shell 21 in structure.

[0081] Depend on Fig.12 It can be concluded without a doubt that for the structure (A+B), its resonance valley (corresponding to the first high-frequency valley V mentioned above) appears at a frequency of about 5500 Hz; and for the structure (B+B), its resonance valley (corresponding to the first high-frequency valley V mentioned above) appears at a frequency of about 8400 Hz. Obviously, if the structure (A+B) is improved to the structure (B+B), the resonance frequency of the structure can be effectively increased.

[0082] Further, for the structure (A+B), the earphone fixing portion 311 is provided with the following Fig.10 The fillet shown in (a) Fig.10 Thickening (b) as shown in Fig.11 Long-Side reinforcement shown in (a) Fig.11 The short-side reinforcement shown in (b) Fig.11 The cross reinforcement (Cross) shown in (c) Fig.11 After the reinforcement structure 318 such as the radial reinforcement (Radiational) shown in (d), the resonance valley of (A+B+reinforcement structure) appears in the frequency range of 5500-8400Hz. In other words, providing the reinforcement structure 318 on the earphone fixing part 311 does help to increase the resonant frequency of the structure, that is, it helps to reduce the stiffness difference between the earphone fixing part 311 and the movement shell 21, and thus helps to improve the above-mentioned sound leakage. It should be noted that: the structure of the reinforcement structure 318 is different, and the effect of increasing the resonant frequency is different, that is, the degree of improvement of the sound leakage is different. Among them, if the effect of the reinforcement structure 318 on the increase of the resonant frequency is ranked from extremely good to relatively good, the order is: cross reinforcement>short side reinforcement>radiation reinforcement>thickening>long side reinforcement>chamfering.

[0083] Based on the above detailed description, the movement 22 generates vibrations under the stimulation of the electrical signal, and drives the movement housing 21 to vibrate together; when the user wears the bone conduction earphone 10, the bottom wall 211 (that is, the skin contact area) of the movement housing 21 can contact the user's skin, so that the above vibrations can be transmitted to the auditory nerve through the human skull, and then the user can hear the sound played by the bone conduction earphone 10. At this time, in order to ensure the reliability of the vibration transmission process, at least the movement housing 21 needs to be able to vibrate with the movement 22. Therefore, the movement 22 needs to be fixed in the movement housing 21.

[0084] like Fig.13 and Figure 8 As shown, one end of the movement housing 21 is open, and the movement bracket 23 and the movement 22 are accommodated in the movement housing 21. The movement bracket 23 is used to fix the movement 22 in the movement housing 21. Further, as Fig.14 As shown, the movement support 23 may include an annular support body 231 and a limiting structure disposed on the support body 231. The movement 22 is hung on the support body 231 to be fixedly connected to the movement housing 21. Fig.13 As shown, the limiting structure and the movement housing 21 can be interfered with, so that the movement bracket 23 is circumferentially (such as Fig.14The plane where the bracket body 231 is located can be parallel to the plane where the bottom wall 211 is located to increase the fit between the two, thereby increasing the vibration transmission effect. At this time, a colloid such as structural glue, hot melt glue, instant glue, etc. can also be set between the bracket body 231 and the bottom wall 211. Fig.13 (not shown). With this arrangement, the movement bracket 23 and the movement housing 21 can be assembled by a combination of snap-fitting and gluing, thereby effectively limiting the degree of freedom between the movement bracket 23 and the movement housing 21. Of course, in some other embodiments, the movement bracket 23 and the movement housing 21 can also be fixed directly by gluing. For example, a colloid such as structural glue, hot melt glue, instant glue, etc. is set between the bracket body 231 and the bottom wall 211. Fig.13 (not shown), it can also effectively limit the degree of freedom between the movement bracket 23 and the movement housing 21; it can also simplify the structure of the movement housing 21.

[0085] like Fig.13 As shown, the movement housing 21 may further include a positioning column 213 connected to the bottom wall 211 or the annular peripheral wall 212. Fig.14 As shown, the limiting structure may include a first limiting structure 232. The first limiting structure 232 is provided with an insertion hole 233. Further, the positioning column 213 is inserted into the insertion hole 233. Such a setting can effectively increase the assembly accuracy between the movement bracket 23 and the movement housing 21. At this time, the above-mentioned colloid can also be set between the bracket body 231 and the bottom wall 211.

[0086] Furthermore, if Fig.14 As shown, the limiting structure may further include a second limiting structure 234. The second limiting structure 234 is arranged along the circumference of the bracket body 231 (eg Fig.14 The second limiting structure 234 is spaced apart from the first limiting structure 232 (in the direction indicated by the arrow C in the middle). The second limiting structure 234 can abut against the annular peripheral wall 212, which will be described in detail later. In this way, the second limiting structure 234 and the first limiting structure 232 are respectively matched with the corresponding structures on the movement housing 21, so that the movement bracket 23 and the movement housing 21 remain relatively fixed, that is, the degree of freedom between the movement bracket 23 and the movement housing 21 is effectively limited.

[0087] like Figure 8 As shown, the opening end of the annular peripheral wall 212 has a long axis direction (such as Figure 8 The direction indicated by the dotted line X) and a short axis direction (as shown in Figure 8 The dimension of the opening end of the annular peripheral wall 212 along the long axis direction may be greater than the dimension along the short axis direction. Fig.15 As shown, the first limiting structure 232 and the second limiting structure 234 are spaced apart on opposite sides of the bracket body 231 along the long axis direction, and the first limiting structure 232 and the second limiting structure 234 are located on the reference plane (such as Fig.15 The projection on the plane shown by the dotted rectangular frame is at least partially located outside the projection of the bracket body 231 on the reference plane. This arrangement facilitates the first limiting structure 232 to cooperate with the positioning column 213, and the second limiting structure 234 to cooperate with the annular peripheral wall 212.

[0088] like Fig.14 As shown, the first limiting structure 232 may include a first axial extension portion 2321 and a first radial extension portion 2322. The first axial extension portion 2321 is connected to the bracket body 231 and extends along the axial direction of the bracket body 231 (eg Fig.14 The first radial extension portion 2322 is connected to the first axial extension portion 2321 and extends toward the outside of the bracket body 231 along the radial direction of the bracket body 231 (that is, the direction in which the diameter of the bracket body 231 is located). At this time, the insertion hole 233 is set on the first radial extension portion 2322, as shown in the direction of the mid-point dashed line Z. Figures 13 to 15 As shown, the first limiting structure 232 cooperates with the positioning column 213. Further, as Fig.14 As shown, the second limiting structure 234 may include a second axial extension portion 2341 and a second radial extension portion 2342. The second axial extension portion 2341 is connected to the support body 231 and extends along the axial direction of the support body 231 toward the side where the movement 22 is located; the second radial extension portion 2342 is connected to the second axial extension portion 2341 and extends along the radial direction of the support body 231 toward the outside of the support body 231. At this time, the second radial extension portion 2342 abuts against the annular peripheral wall 212, as shown in FIG. Fig.13 and Fig.15 As shown, for example, the two are engaged so that the second limiting structure 234 and the annular peripheral wall 212 are in contact with each other. Fig.13 As shown, the movement 22 is located between the first axial extension portion 2321 and the second axial extension portion 2341 .

[0089] It should be noted that: Figures 13 to 15 As shown, taking the movement 22 as a reference, if the area between the first axial extension portion 2321 and the second axial extension portion 2341 is the inner side of the bracket body 231 , then the area outside the inner side is the outer side of the bracket body 231 .

[0090] See again Fig.13The annular peripheral wall 212 may further include an inclined region 214 corresponding to the first limiting structure 232 and inclined relative to the bottom wall 211. The positioning post 213 may be arranged on the inclined region 214. In this way, the effective distance between the first radial extension portion 2322 and the bottom wall 211 can be reduced, that is, the height of the positioning post 213 can be reduced, thereby increasing the structural strength of the positioning post 213 (especially the root portion thereof connected to the inclined region 214) on the movement housing 21, so as to avoid the positioning post 213 from breaking or falling off when the bone conduction earphone 10 is dropped or collided.

[0091] See again Fig.15 The number of the second limiting structures 234 can be two arranged at intervals along the short axis direction. The projection of the first limiting structure 232 on the reference plane and the projections of the two second limiting structures 234 on the reference plane are connected in sequence to form an acute triangle (such as Fig.15 In this case, the acute triangle may be an acute isosceles triangle or an equilateral triangle. This arrangement allows the interaction points between the movement support 23 and the movement housing 21 to be arranged symmetrically as much as possible, thereby increasing the reliability of the assembly of the movement support 23 and the movement housing 21.

[0092] Furthermore, the outer contour of the bracket body 231 can be set in a circular shape, and the annular peripheral wall 212 can be relatively provided with two arc-shaped recessed areas 2121 along the short axis direction. The outer contour of the bracket body 231 is respectively embedded in the two arc-shaped recessed areas 2121. Such a setting can further limit the degree of freedom between the movement bracket 23 and the movement housing 21.

[0093] Based on the above detailed description, when the elastic modulus of the core housing 21 is greater than the elastic modulus of the ear hook housing 31, the ear hook housing 31 is connected to the core housing 21 to form the above structure (A+B). Due to the difference in stiffness, the resonant frequency of the structure (A+B) may be lower (e.g. Fig.16 The above-mentioned sound leakage is also prone to occur when the structure (A+B) is improved to the structure (B+B), and the resonant frequency of the structure can be effectively increased (as shown in the middle curve (A+B)). Fig.12 Based on this, the present embodiment improves the relevant structure of the movement module 20.

[0094] like Fig.16As shown, the movement module 20 may also include a cover plate 24. Among them, one end of the movement housing 21 is open, and the cover plate 24 is covered on the open end of the movement housing 21 to form a cavity structure for accommodating the movement 22. In other words, the cover plate 24 is covered on the other end of the annular peripheral wall 212 away from the bottom wall 211, and is arranged opposite to the bottom wall 211. At this time, the cover plate 24 and the movement housing 21 can be connected by gluing or a combination of snap-on and gluing. Further, the ear hook housing 31 is connected to the cover plate 24, for example, the earphone fixing portion 311 covers the side of the cover plate 24 away from the movement housing 21 in a full covering or half covering manner. Among them, this embodiment is exemplified by taking the earphone fixing portion 311 as an example to fully cover the cover plate 24. At this time, the ear hook housing 31 and the movement housing 21 can still be connected by gluing or a combination of snap-on and gluing.

[0095] It should be noted that: Fig.16 The ear hook shell is illustrated in the figure, mainly to facilitate the description of the relative position relationship between the ear hook shell and the cover plate, and then implicitly illustrate a possible assembly method between the ear hook shell and the cover plate.

[0096] In this embodiment, the elastic modulus of the movement housing 21 is greater than the elastic modulus of the ear hook housing 31, and the elastic modulus of the cover plate 24 is greater than the elastic modulus of the ear hook housing 31. At this time, the cover plate 24 is used in this embodiment to replace the headphone fixing portion 311 to connect with the movement housing 21, which helps to increase the rigidity of the structure located at the open end of the movement housing 21 (specifically, the cover plate 24 and the headphone fixing portion 311), and further helps to reduce the difference between the rigidity of the bottom wall 211 of the movement housing 21 and the rigidity of the structure at its open end. Such a configuration can ensure that the movement housing 21 has a sufficiently large rigidity so that its resonant frequency is located in the highest possible high frequency range, and also helps to increase the resonant frequency of the structure (movement housing 21+cover plate 24+headphone fixing portion 311), and helps to improve the above-mentioned sound leakage.

[0097] Furthermore, the elastic modulus of the cover plate 24 may be less than or equal to the elastic modulus of the movement housing 21. Preferably, the elastic modulus of the cover plate 24 is equal to the elastic modulus of the movement housing 21. At this time, the cover plate 24 and the movement housing 21 may form a structure similar to the above (B+B) after being connected. With such an arrangement, the ratio of the difference between the rigidity K1 of the bottom wall 211 and the rigidity K3 of the cover plate 24 to the rigidity K1 of the bottom wall 211 may be less than or equal to 10%. That is, (K1-K3) / K1≤10%, or K3 / K1≥90%.

[0098] In some embodiments, the area of ​​the bottom wall 211 is less than or equal to the area of ​​the cover plate 24, and the thickness of the bottom wall 211 is less than or equal to the thickness of the cover plate 24. Based on the above detailed description, under the premise of ensuring a certain wearing comfort, reducing the area of ​​the bottom wall 211 can increase the resonance frequency of the movement housing 21. Therefore, in order to ensure that the movement housing 21 has a sufficiently large rigidity so that its resonance frequency is located in the high-frequency region as high as possible, this embodiment makes the area of ​​the bottom wall 211 less than or equal to the area of ​​the cover plate 24, that is, the area of ​​the opening end of the movement housing 21 is greater than the area of ​​the bottom wall 211. Further, according to the above relationship K∝(E·t) / S, when the elastic modulus of the cover plate 24 is less than or equal to the elastic modulus of the movement housing 21, and the area of ​​the bottom wall 211 is less than or equal to the area of ​​the cover plate 24, in order to satisfy the above relationship (K1-K3) / K1≤10%, the thickness of the bottom wall 211 needs to be less than or equal to the thickness of the cover plate 24.

[0099] In some other embodiments, the material of the cover plate 24 can be the same as that of the movement housing 21, for example, the material of the cover plate 24 is a mixture of polycarbonate and glass fiber and / or carbon fiber. Further, according to the above relationship K∝(E·t) / S, in order to satisfy the above relationship K3 / K1≥90%, the ratio between the thickness and area of ​​the cover plate 24 and the thickness and area of ​​the bottom wall 211 needs to be greater than or equal to 90%. Preferably, the ratio between the thickness and area of ​​the bottom wall 211 is equal to the ratio between the thickness and area of ​​the cover plate 24.

[0100] It should be noted that: according to the above relationship K∝(E·t) / S, in order to satisfy the above relationship (K1-K3) / K1≤10%, the structural parameters (such as thickness, area and proportion thereof) of the cover plate 24 and the movement housing 21 can be designed based on the materials of the cover plate 24 and the movement housing 21, or the materials of the cover plate 24 and the movement housing 21 can be selected based on the structural parameters of the cover plate 24 and the movement housing 21. Therefore, the above embodiment only provides two possible design solutions as examples.

[0101] Based on the above detailed description, after the cover 24 replaces the earphone fixing part 311 to be connected to the movement shell 21, the earphone fixing part 311 still needs to be connected to the side of the cover 24 facing away from the movement shell 21, for example, the earphone fixing part 311 fully covers the cover 24.

[0102] In some embodiments, if the ear hook shell 31 and the cover plate 24 are both made of plastic, and the elastic modulus of the former is smaller than that of the latter, the two can be formed into an integral structure by means of two-color injection molding. If the ear hook shell 31 is made of plastic, and the cover plate 24 is made of metal, and the elastic modulus of the former is smaller than that of the latter, the two can be formed into an integral structure by means of metal insert injection molding. At this time, the ear hook shell 31 and the cover plate 24 will be connected to the movement shell 21 as a whole. In this way, the consistency of the vibration of the ear hook shell 31 and the cover plate 24 can be well ensured; however, it will be difficult to set the buttons mentioned above, the second microphone mentioned later, etc. between the ear hook shell 31 and the cover plate 24.

[0103] In some other embodiments, the earphone fixing portion 311 and the cover plate 24 are connected by gluing or a combination of clamping and gluing. In this case, the button mentioned above and the second microphone mentioned below are also arranged between the earhook housing 31 and the cover plate 24. The specific structure will be described in detail below. Fig.16 The filling degree between the two (not shown) should be as large as possible, for example, the filling degree is greater than or equal to 90%. Because, when the filling degree of the colloid provided between the earphone fixing part 311 and the cover plate 24 is small, not only the connection strength between the earphone fixing part 311 and the cover plate 24 is difficult to ensure, but also the vibration of the two may have a large hysteresis problem, and air may be mixed between the two, resulting in an adverse effect on the resonant frequency of the structure, that is, the beneficial effect of improving the structure (A+B) to the structure (B+B) mentioned above is difficult to ensure, and the structure may also have noise problems during vibration.

[0104] In addition, the inventors of the present application have also found in long-term research that under the same conditions, if Fig.17 As shown, different types of colloids (such as structural adhesive, hot melt adhesive, instant adhesive, silicone, etc.) are arranged between the earphone fixing portion 311 and the cover plate 24, which also has a great influence on the resonant frequency of the structure. Fig.17 It can be concluded without a doubt that different types of colloids do have an impact on the resonant frequency of the structure; if the beneficial effects of the above colloids on the resonant frequency are ranked from best to worst, the order is: structural adhesive> hot melt adhesive> instant adhesive> silicone. It should be noted that since the texture of silicone is generally soft, its beneficial effect on the resonant frequency of the structure is the weakest. Therefore, if the resonant frequency of the structure is considered, it is preferred to set a colloid with greater hardness between the earphone fixing portion 311 and the cover plate 24.

[0105] Based on the above detailed description, on the one hand, the movement bracket 23 can be used to fix the movement 22 in the movement housing 21 to increase the reliability of the movement 22 driving the movement housing 21 to vibrate; on the other hand, the cover plate 24 can be used to increase the rigidity of the structure located at the open end of the movement housing 21 (specifically, the cover plate 24 and the earphone fixing portion 311) to reduce the difference between the rigidity of the bottom wall 211 of the movement housing 21 and the rigidity of the structure at its open end. Among them, as for the cooperation between the movement bracket 23 and the movement housing 21 (especially in the above-mentioned Z direction), it can be achieved by gluing between the bracket body 231 and the bottom wall 211; and / or, the clamping between the limiting structure and the annular peripheral wall 212. Further, based on the cover plate 24, this embodiment provides another inventive concept for the cooperation between the movement bracket 23 and the movement housing 21 (especially in the above-mentioned Z direction).

[0106] like Fig.18 and Fig.19 As shown, the cover plate 24 is not only covered on the open end of the movement housing 21, but also a pressing structure is provided on the side of the cover plate 24 facing the movement housing 21. The pressing structure is used to press and fix the movement bracket 23 in the movement housing 21. In this way, the cover plate 24 can not only increase the rigidity of the structure at the open end of the movement housing 21 (specifically, the cover plate 24 and the earphone fixing part 311), but also press the movement bracket 23 in the movement housing 21, thereby enabling the cover plate 24 to achieve "one piece and two uses".

[0107] like Fig.19 As shown, the cover plate 24 may include a cover plate body 241 and a pressing structure integrally connected to the cover plate body 241. The pressing structure may include a first pressing column 242 and a second pressing column 243, and the first pressing column 242 and the second pressing column 243 are arranged at intervals along the circumference of the cover plate body 241, and abut against the movement bracket 23. Further, the plane where the cover plate body 241 is located can be parallel to the plane where the bottom wall 211 is located, so that the plane where the cover plate body 241 is located can be parallel to the plane where the bracket body 231 is located, and then the extension direction of the first pressing column 242 and the second pressing column 243 can be perpendicular to the plane where the bracket body 231 is located, that is, the extension direction of the first pressing column 242 and the second pressing column 243 can be parallel to the above-mentioned Z direction. Such a setting can effectively limit the degree of freedom between the movement bracket 23 and the movement housing 21, especially in the above-mentioned Z direction.

[0108] like Fig. 20 As shown, the cover plate 24 may have a long axis direction (eg Fig. 20 The direction indicated by the dotted line X) and a short axis direction (as shown in Fig. 20The direction indicated by the dotted line Y). The dimension of the cover plate 24 along the long axis direction may be greater than the dimension along the short axis direction. At this time, the first pressing column 242 and the second pressing column 243 are arranged at intervals along the long axis direction. Such arrangement can increase the reliability of the cover plate 24 pressing the movement bracket 23 into the movement housing 21.

[0109] Furthermore, the number of the second pressure columns 243 can be two arranged at intervals along the short axis direction. The projection of the first pressure column 242 on the cover body 241 and the projections of the two second pressure columns 243 on the cover body 241 are connected in sequence to form an acute triangle (such as Fig. 20 In this case, the acute triangle can be an acute isosceles triangle or an equilateral triangle. This arrangement allows the interaction points between the cover plate 24 and the movement bracket 23 to be arranged symmetrically as much as possible, thereby increasing the reliability of the cover plate 24 pressing the movement bracket 23 into the movement housing 21.

[0110] See again Fig.18 The first pressing column 242 contacts and abuts against the first limiting structure 232, and the second pressing column 243 contacts and abuts against the second limiting structure 234. At this time, the second limiting structure 234 and the annular peripheral wall 212 may not be formed as shown in FIG. Fig.13 The abutting matching relationship shown is used to reduce the processing accuracy of the second limiting structure 234, thereby saving the manufacturing cost of the movement bracket 23.

[0111] Similarly, if Fig.14 As shown, the first limiting structure 232 may include a first axial extension portion 2321 and a first radial extension portion 2322. The first axial extension portion 2321 is connected to the bracket body 231 and extends along the axial direction of the bracket body 231 (eg Fig.14 The first radial extension portion 2322 is connected to the first axial extension portion 2321, and extends toward the outside of the bracket body 231 along the radial direction of the bracket body 231 (that is, the direction in which the diameter of the bracket body 231 is located). At this time, the insertion hole 233 is set on the first radial extension portion 2322, and the first pressing column 242 is in contact with the first radial extension portion 2322, that is, the first pressing column 242 presses the first radial extension portion 2322. Further, as Fig.14As shown, the second limiting structure 234 may include a second axial extension portion 2341 and a second radial extension portion 2342. The second axial extension portion 2341 is connected to the support body 231 and extends along the axial direction of the support body 231 toward the side where the movement 22 is located; the second radial extension portion 2342 is connected to the second axial extension portion 2341 and extends along the radial direction of the support body 231 toward the outside of the support body 231. At this time, the second pressing column 243 is in contact with the second radial extension portion 2342, that is, the two are in contact and form a pressing force.

[0112] It should be noted that: when the number of the second pressing columns 243 is two arranged at intervals along the minor axis direction, and the projection of the first pressing column 242 on the cover plate body 241 and the projection of the two second pressing columns 243 on the cover plate body 241 are connected in sequence to form an acute triangle, the number of the second limiting structures 234 can also be two arranged at intervals along the minor axis direction, and they are respectively arranged corresponding to the second pressing columns 243. In this way, when the first pressing column 242 abuts against the first limiting structure 232 (specifically, the first radial extension 2322), the two second pressing columns 243 can respectively abut against the second limiting structure 234 (specifically, the second radial extension 2342), thereby increasing the reliability of the cover plate 24 pressing the movement bracket 23 into the movement housing 21.

[0113] It is worth noting that: Fig.18 As shown, since the first axial extension portion 2321 and the second axial extension portion 2341 extend toward the direction close to the cover plate 24, the first pressure column 242 and the second pressure column 243 also extend toward the direction close to the movement housing 21, so that the height of the first limiting structure 232 and the second limiting structure 234 relative to the bracket body 231, and the height of the first pressure column 242 and the second pressure column 243 relative to the cover plate body 241 can both be half of the distance between the cover plate body 241 and the bracket body 231. Such arrangement can avoid the undesirable phenomenon that the first limiting structure 232 and the second limiting structure 234 are broken or fall off due to their excessive height relative to the bracket body 231 when the bone conduction earphone 10 falls, collides, or other extreme situations occur; or avoid the undesirable phenomenon that the first pressing column 242 and the second pressing column 243 are broken or fall off due to their excessive height relative to the cover body 241 when the bone conduction earphone 10 falls, collides, or other extreme situations occur, thereby taking into account the structural strength of the first limiting structure 232 and the second limiting structure 234 on the bracket body 231 and the structural strength of the first pressing column 242 and the second pressing column 243 on the cover body 241.

[0114] See again Fig.19 , the first pressing column 242 is arranged in a tubular shape. Fig.18As shown, the positioning column 213 is not only inserted into the insertion hole 233 to increase the assembly accuracy between the movement bracket 23 and the movement housing 21; it is also further inserted into the first pressing column 242 to increase the assembly accuracy between the cover plate 24 and the movement housing 21.

[0115] like Fig.21 As shown, the movement module 20 may also include a first microphone 25 and a second microphone 26. When the cover plate 24 is covered on the open end of the movement housing 21, the two form a cavity structure for accommodating the movement 22. At this time, the first microphone 25 can be accommodated in the movement housing 21, and the second microphone 26 can be arranged outside the movement housing 21, so that the cover plate 24 separates the first microphone 25 from the second microphone 26, thereby avoiding interference between the two (especially the rear sound cavity of the two). In this way, the cover plate 24 can not only increase the rigidity of the structure located at the open end of the movement housing 21 (specifically, the cover plate 24 and the earphone fixing part 311), and can press the movement bracket 23 into the movement housing 21, but also separate the first microphone 25 from the second microphone 26, thereby enabling the cover plate 24 to achieve "one piece, three uses". Further, when the ear hook housing 31 is covered on the cover plate 24 , that is, the earphone fixing portion 311 is covered on the side of the cover plate 24 facing away from the movement housing 21 , the second microphone 26 can be arranged between the cover plate 24 and the earphone fixing portion 311 .

[0116] Furthermore, both the first microphone 25 and the second microphone 26 can be connected to the main control circuit board 50 so that the two can process the sound and transmit it to the main control circuit board 50. The first microphone 25 and the second microphone 26 can be any one of the types of electric, capacitive, piezoelectric, carbon particle, semiconductor, etc. or a combination thereof, and can be an electret pickup or a silicon pickup. The specific structure is within the scope of understanding of those skilled in the art and will not be described in detail here. At this time, the first microphone 25 and the second microphone 26 can be used to pick up the sound of the wearer's environment so that the bone conduction earphone 10 can perform noise reduction processing, thereby improving the user's favorability of the bone conduction earphone 10; they can also be used to pick up the wearer's voice so that the bone conduction earphone 10 can realize the microphone function while realizing the speaker function, thereby expanding the application range of the bone conduction earphone 10. Of course, the first microphone 25 and the second microphone 26 can also pick up the wearer's voice and the sound of the environment in which he is located at the same time, so that while the bone conduction headset 10 realizes the microphone function, it can also perform noise reduction processing, thereby improving the user favorability of the bone conduction headset 10.

[0117] like Fig.21As shown, an annular flange 215 is provided on the inner side of the annular peripheral wall 212, and the first microphone 25 can be embedded and fixed in the annular flange 215. A microphone accommodating groove 244 is provided in a recessed manner on the side of the cover plate 24 (specifically, the cover plate body 241) facing away from the movement housing 21, and the second microphone 26 can be provided in the microphone accommodating groove 244 and covered by the earphone fixing portion 311, so as to reduce the overall thickness after the second microphone 26 is provided between the cover plate 24 and the earphone fixing portion 311, thereby increasing the feasibility and reliability of the three structures. In other words, the first microphone 25 is fixed on the annular peripheral wall 212, and the second microphone 26 is fixed on the cover plate 24. At this time, in order to facilitate the first microphone 25 and the second microphone 26 to pick up the voice of the wearer and / or the sound of the environment in which they are located, a sound pickup hole (not marked in the figure) is generally opened at the position corresponding to the first microphone 25 on the annular peripheral wall 212, and a sound pickup hole (not marked in the figure) is generally opened at the position corresponding to the second microphone 26 on the earphone fixing part 311. Among them, the sound input direction of the first microphone 25 can be parallel to the cover plate 24 or inclined relative to the cover plate 24, and the sound input direction of the second microphone 26 can be perpendicular to the cover plate 24. In this way, the first microphone 25 and the second microphone 26 can pick up sounds from different directions, so as to increase the noise reduction effect and / or microphone effect of the bone conduction earphone 10, thereby improving the user's favorability of the bone conduction earphone 10.

[0118] It should be noted that: generally, the sound input direction of the first microphone 25 is perpendicular to the annular circumferential wall 212; and based on the above detailed description, the plane where the cover plate 24 (specifically, the cover plate body 241) is located can be parallel to the plane where the bottom wall 211 is located, and the annular circumferential wall 212 can be perpendicular to the bottom wall 211, or can be inclined outwardly at an angle relative to the bottom wall 211 (for example, the inclination angle is less than or equal to 30°). Therefore, when the annular circumferential wall 212 is perpendicular to the bottom wall 211, the sound input direction of the first microphone 25 is parallel to the cover plate 24; and when the annular circumferential wall 212 is inclined outwardly at an angle relative to the bottom wall 211, the sound input direction of the first microphone 25 is inclined relative to the cover plate 24, and the inclination angles of the two can be substantially equal.

[0119] Furthermore, the projection of the second microphone 26 on the cover plate 24 and the projection of the first microphone 25 on the cover plate 24 can be staggered with each other. This arrangement enables the first microphone 25 and the second microphone 26 to pick up sounds from different directions, so as to increase the noise reduction effect and / or microphone effect of the bone conduction headset 10, thereby improving the user favorability of the bone conduction headset 10. Among them, the projection of the second microphone 26 on the cover plate 24 can be arranged closer to the bending transition portion 312 than the projection of the first microphone 25 on the cover plate 24. This arrangement increases the relative distance between the first microphone 25 and the second microphone 26, and further enables the first microphone 25 and the second microphone 26 to pick up sounds from different directions. It is worth noting that the larger the relative distance, the better.

[0120] It should be noted that: Fig.21 In the perspective shown, the first microphone 25 and the second microphone 26 are respectively located on opposite sides of the cover plate 24, and the first microphone 25 is located on the back of the cover plate 24, so that the projection of the first microphone 25 on the cover plate 24 is actually invisible. Therefore, in order to facilitate the corresponding description, it is simply regarded here that the first microphone 25 and the second microphone 26 are located on the same side of the cover plate 24, and the projection of the first microphone 25 on the cover plate 24 is replaced by a dotted frame.

[0121] like Fig. 22 As shown, the cover plate 24 may have a long axis direction (eg Fig. 22 The direction indicated by the dotted line X) and a short axis direction (as shown in Fig. 22 The dimension of the cover plate 24 along the long axis direction may be greater than the dimension along the short axis direction. In this case, the line between the projection of the second microphone 26 on the cover plate 24 and the projection of the first microphone 25 on the cover plate 24 (as shown in FIG. Fig. 22 The angle between the projection of the second microphone 26 on the cover plate 24 and the projection of the first microphone 25 on the cover plate 24 is less than 45°; preferably, the angle is less than or equal to 10°. More preferably, the line between the projection of the second microphone 26 on the cover plate 24 and the projection of the first microphone 25 on the cover plate 24 coincides with the long axis direction. In this way, the projection of the second microphone 26 on the cover plate 24 and the projection of the first microphone 25 on the cover plate 24 can be staggered from each other, and the relative distance between the two can be increased, so that the first microphone 25 and the second microphone 26 can further pick up sounds from different directions. Among them, the projection of the second microphone 26 on the cover plate 24 can be arranged closer to the bending transition portion 312 than the projection of the first microphone 25 on the cover plate 24.

[0122] Based on the above detailed description, the movement 22 and the first microphone 25 can be arranged in the movement housing 21, and the cover plate 24 can be arranged on the open end of the movement housing 21. In order to facilitate wiring, corresponding through holes and grooves can be provided on the cover plate 24. Fig.21 and Fig.16 As shown, the cover plate 24 is also provided with a threading hole 245. Since the projection of the second microphone 26 on the cover plate 24 can be arranged closer to the bending transition portion 312 than the projection of the first microphone 25 on the cover plate 24, the threading hole 245 can be arranged closer to the first microphone 25. This arrangement allows the wire ( Fig.21 and Fig.16 The wire (not shown in the figure) can extend from the movement housing 21 through the threading hole 245 to the side of the cover plate 24 away from the movement housing 21, and further extend to the accommodation compartment 313 through the wiring channel in the bent transition portion 312. At this time, after the earphone fixing portion 311 covers the cover plate 24, at least part of the wire (its length can be at least the straight-line distance between the threading hole 245 and the second microphone 26) is located between the cover plate 24 and the earphone fixing portion 311.

[0123] Furthermore, if Fig.21 and Fig.16 As shown, the side of the cover plate 24 facing away from the movement housing 21 may be recessed to provide a wiring groove 246. One end of the wiring groove 246 is connected to the threading hole 245, and the above-mentioned wires may further extend along the wiring groove 146. This arrangement can reduce the overall thickness after part of the wires are arranged between the cover plate 24 and the earphone fixing portion 311, thereby increasing the feasibility and reliability of the three structures.

[0124] It should be noted that after the wires are routed from the movement housing 21 through the threading holes 245 and the routing grooves 246, glue can be applied at least at both ends of the routing grooves 246 to fix the wires relatively to the cover plate 24, thereby increasing the compactness of the cover plate 24, the earphone fixing portion 311, and the wires. In particular, applying glue at the threading holes 245 can also improve the airtightness of the movement module 20.

[0125] Furthermore, if Fig.21 As shown, two wire management grooves 216 may be arranged side by side on the inner side of the annular peripheral wall 212, and the two wire management grooves 216 may be close to the annular flange 215. Fig.21 Not shown) and the positive and negative terminals of the movement 22 ( Fig.21 The two welding points formed between the two terminals (not shown) are accommodated in two wire management grooves 216. This arrangement can avoid the occurrence of short circuit and other undesirable phenomena when the positive and negative terminals of the movement 22 are welded with the positive and negative electrodes of the above-mentioned wires, thereby increasing the reliability of the movement 22 routing.

[0126] In some other embodiments, when the bone conduction headset 10 is further provided with Figure 4 When the key 36 is shown, a key receiving groove ( Figure 1 311). The button 36 is disposed in the button receiving groove and covered by the earphone fixing portion 311. This arrangement reduces the overall thickness of the cover plate 24 and the earphone fixing portion 311 after the button 36 is disposed, thereby increasing the feasibility and reliability of the three structures. At this time, the button receiving groove is similar to the microphone receiving groove 244 described above.

[0127] It should be noted that: Figure 2 The storage compartment 313 shown can be mainly used to accommodate the main control circuit board 50. Figure 4 The storage compartment 313 shown may be mainly used to accommodate the battery 60. Therefore, the first microphone 25 and the second microphone 26 may specifically correspond to Figure 2 The ear hook assembly 30 shown in the figure is convenient for connecting the two to the main control circuit board 50, thereby shortening the wiring distance. In addition, due to the limited volume of the movement module 20 and the ear hook assembly 30, if the button 36 is set together with the first microphone 25 and the second microphone 26, it may cause interference between the three in structure. Therefore, the button 36 can specifically correspond to Figure 4 In other words, if the button 36 corresponds to the left ear hook of the bone conduction headset 10, the first microphone 25 and the second microphone 26 may correspond to the right ear hook of the bone conduction headset 10; conversely, if the button 36 corresponds to the right ear hook of the bone conduction headset 10, the first microphone 25 and the second microphone 26 may correspond to the left ear hook of the bone conduction headset 10. Figure 8 As for the movement module 20 shown in FIG. Fig.16 The cover plate 24 of the movement module 20 shown in the figure may require corresponding adjustments to the related structures such as the first microphone 25, the second microphone 26 and the button 36. For example: the bone conduction earphone 10 has only one first microphone 25 or the second microphone 26; or, the bone conduction earphone 10 still has the first microphone 25 and the second microphone 26, and when any one of the first microphone 25 and the second microphone 26 corresponds to the left ear hook of the bone conduction earphone 10, the other corresponds to the right ear hook of the bone conduction earphone 10. For another example: the button 36 is specifically fixed to the side of the earphone fixing part 311 close to the housing 21.

[0128] like Fig.23As shown, the movement 22 may include a magnetic cover 221, a magnet 222, a magnetic plate 223 and a coil 224. Among them, the magnetic cover 221 may include a bottom plate 2211 and an annular side plate 2212 integrally connected to the bottom plate 2211. Further, the magnet 222 may be arranged in the annular side plate 2212 and fixed on the bottom plate 2211, and the magnetic plate 223 may be fixed on the side of the magnet 222 away from the bottom plate 2211. The coil 224 may be arranged in the magnetic gap 225 between the magnet 222 and the annular side plate 2212, and may be fixed on the movement bracket 23. In this embodiment, the magnetic gap between the magnet 222 and the annular side plate 2212 may be m, 1.0mm≤m≤1.5mm, so as to take into account the movement requirements of the coil 224 and the compactness of the movement 22.

[0129] It should be noted that: Fig.23 The movement shown can correspond to Figure 8 The movement module shown can also correspond to Fig.16 The movement module shown. Further, Fig.23 The movement bracket is shown in the figure, mainly to facilitate the description of the relative position relationship between the movement bracket and the movement, and then implicitly show a possible assembly method between the movement bracket and the movement.

[0130] The magnet 222 may be, but is not limited to, a metal alloy magnet, a ferrite, etc. Specifically, the metal alloy magnet may be, but is not limited to, any one or a combination of neodymium iron boron, samarium cobalt, aluminum nickel cobalt, iron chromium cobalt, aluminum iron boron, iron carbon aluminum, etc.; the ferrite may be, but is not limited to, any one or a combination of barium ferrite, steel ferrite, manganese ferrite, lithium manganese ferrite, etc. Further, the magnet 222 has a magnetization direction so as to form a relatively stable magnetic field.

[0131] The magnetic shield 221 and the magnetic plate 223 cooperate with each other, mainly used to adjust the magnetic field generated by the magnet 222, so as to increase the utilization rate of the magnetic field. The magnetic shield 221 and the magnetic plate 223 can be made of paramagnetic materials such as metal materials, metal alloys, metal oxide materials, amorphous metal materials, etc. Specifically, the above-mentioned soft magnetic materials can be but are not limited to iron, iron-silicon alloys, iron-aluminum alloys, nickel-iron alloys, iron-cobalt alloys, low-carbon steel, silicon steel sheets, silicon steel sheets, ferrites, etc.

[0132] In this configuration, the coil 224 is in the magnetic field formed by the magnet 222, the magnetic cover 221 and the magnetic plate 223, and is acted upon by the Ampere force under the excitation of the electrical signal. The coil 224 causes the movement 22 to generate mechanical vibrations under the drive of the Ampere force, and the movement 22 can be fixed in the movement housing 21 through the movement bracket 23, so that the movement housing 21 can vibrate together with the movement. In this embodiment, the resistance of the coil 224 can be 8Ω, so as to take into account both the generation requirements of the Ampere force and the circuit structure of the movement 22.

[0133] Based on the above detailed description, the volume of the movement housing 21 is often limited, and at least the movement 22, the movement bracket 23 and the first microphone 25 need to be accommodated. Although a larger Ampere force can be obtained by increasing the movement 22 (for example, increasing the volume of the magnet 222 and / or increasing the number of turns of the coil 224), thereby better driving the movement housing 21; however, this will also increase the weight and volume of the movement module 20, which is not conducive to the lightweight of the movement module 20. To this end, the inventors of the present application have conducted a lot of research and optimized the design of the movement 22 based on the Ampere force formula F = BILsinθ. Among them, the parameter B can represent the strength of the magnetic field formed by the magnet 222, the magnetic cover 221 and the magnetic plate 223, the parameter L can represent the effective length of the coil 224 in the above magnetic field; and the parameter θ can represent the angle between the two (here θ = 90°). Further, the parameter I can represent the current in the coil 224 at a certain moment. Obviously, for a movement 22 that has been designed, manufactured and assembled, the parameters B and L are often relatively fixed values, while the parameter I changes with the change of the electrical signal input into the movement 22. Therefore, the optimal design of the movement 22 can be simply regarded as the optimal design of the force coefficient BL, while the parameters B and L mainly depend on the structural parameters such as the shape and size of the magnet 222, the magnetic shield 221 and the magnetic plate 223.

[0134] The following is a detailed description of the influence of the shape, size and other structural parameters of the magnet 222, the magnetic cover 221 and the magnetic plate 223 on the force coefficient BL:

[0135] In the embodiment of the present application, the magnet 222 may be cylindrical. Fig.24As shown, the horizontal axis is the diameter φ of the magnet 222, and the vertical axis is the thickness t1 of the magnet 222. It can be concluded without a doubt that the larger the diameter φ of the magnet 222, the larger the value of the force coefficient BL; the larger the thickness t1 of the magnet 222, the larger the value of the force coefficient BL. The inventors of the present application have found in long-term research that in order to enable the bone conduction earphone 10 to produce enough volume, that is, to generate a large enough Ampere force to drive the coil 224 and then drive the movement housing 21 to vibrate, the value of the force coefficient BL is generally required to be greater than 1.3. However, considering the weight and volume of the movement module 20 (specifically, the movement 22), the diameter φ and thickness t1 of the magnet 222 can preferably satisfy the following relationship: 10.5mm≤φ≤11.5mm, 3.0mm≤t1≤4.0mm. More preferably, the diameter φ of the magnet 222 can be 10.8mm, and the thickness t1 can be 3.5mm.

[0136] In the embodiment of the present application, the diameter of the magnetic plate 223 can be equal to the diameter of the magnet 222, the thickness of the magnetic plate 223 can be equal to the thickness of the magnetic cover 221, and the magnetic plate 223 and the magnetic cover 221 can also be made of the same material. Fig.25 As shown, the horizontal axis is the thickness t2 of the magnetic shield 221, and the vertical axis is the force coefficient BL. It can be concluded without a doubt that within a certain range, the value of the force coefficient BL increases with the increase of the thickness t2; however, for t2>0.8mm, the change in the value of the force coefficient BL is not obvious, that is, after t2>0.8mm, continuing to increase the thickness t2 will not only have little benefit but will also increase the weight of the movement 22. Therefore, considering the value of the force coefficient BL (at least greater than 1.3) and the weight and volume of the movement module 20 (specifically, it can be the movement 22), the thickness t2 of the magnetic plate 223 and the magnetic shield 221 can preferably satisfy the following relationship: 0.4mm≤t2≤0.8mm. More preferably, the thickness t2 can be 0.5mm.

[0137] In the embodiment of the present application, the annular side plate 2212 may also be cylindrical, and its diameter D may be the sum of the diameter φ of the magnet 222 and twice the magnetic gap m, that is, D=φ+2m. Fig.26As shown, the horizontal axis is the height h of the magnetic shield 221 (specifically, the annular side plate 2212), and the vertical axis is the force coefficient BL. It can be concluded without a doubt that within a certain range, the value of the force coefficient BL increases with the increase of the height h of the magnetic shield 221; however, for h>4.2mm, the value of the force coefficient BL becomes smaller and smaller. Therefore, considering the value of the force coefficient BL (at least greater than 1.3) and the weight and volume of the movement module 20 (specifically, the movement 22), the height h of the magnetic shield 221 can preferably satisfy the following relationship: 3.4mm≤h≤4.0mm. More preferably, the height h of the magnetic shield 221 can be 3.7mm.

[0138] See again Figure 1 The bone conduction headset 10 may include two core modules 20. Any one of the two core modules 20 may correspond to Figure 8 The movement module shown, the other can correspond to Fig.16 It should be noted that the specific structure of each movement module 20 can be the same or similar to that of any of the above embodiments, and the detailed description of any of the above embodiments can be referred to, which will not be repeated here.

[0139] like Fig. 27 As shown, the polarities of the magnets 222 of the two movement modules 20 close to the bottom wall 211 of the movement housing 21 where they are located are different, so that when the bone conduction earphone 10 is not worn, the two movement modules 20 can be adsorbed to each other. This arrangement makes it easier for users to store the bone conduction earphone 10. It is worth noting that the magnet 222 of this embodiment is also used to form a magnetic field, so that the coil 224 can vibrate under the excitation of an electrical signal. At this time, the magnet 222 can achieve "one piece for two purposes".

[0140] Furthermore, before the movement module 20 is assembled, the magnet 222 may not be pre-magnetized; instead, after the movement module 20 is assembled, the movement module 20 as a whole is placed in a magnetizing device for magnetization treatment, thereby making the magnet 222 magnetic. After the above magnetization treatment, the magnetic field directions of the magnets 222 of the two movement modules 20 may be as follows: Fig. 27 With such arrangement, since the magnet 222 has no magnetism before assembly, the assembly of the core module 20 will not be disturbed by magnetic force, thereby increasing the assembly efficiency and yield rate of the core module 20, thereby increasing the production capacity and benefits of the bone conduction earphone 10.

[0141] like Fig.28As shown, the rear hanging component 40 may include an elastic metal wire 41, a wire 42, and an elastic coating 43 covering the elastic metal wire 41 and the wire 42. The elastic coating 43 and the wire 42 are an integral structure formed by extrusion; the coating 43 further forms a threading channel ( Fig.28 (not marked in the figure), the elastic metal wire 41 is inserted into the threading channel. Preferably, the threading channel is formed during the extrusion molding process. Further, the material of the elastic metal wire 41 can be but not limited to spring steel, titanium alloy, titanium-nickel alloy, chrome-molybdenum steel, etc., and the material of the elastic coating 43 can be but not limited to polycarbonate, polyamide, silicone, rubber, etc., so that the rear hanging component 40 can take into account both the wearing comfort and the structural rigidity.

[0142] It should be noted that: since the elastic metal wire 41 is passed through the threading channel and is arranged in the covering body 43, Fig.28 The area where the middle elastic metal wire 41 is located can be simply regarded as a threading channel in the sheath 43 .

[0143] Furthermore, the diameter of the threading channel in its natural state can be smaller than the diameter of the elastic metal wire 41, so that the elastic metal wire 41 can remain fixed with the elastic sheathing body 43 after being inserted into the threading channel, thereby avoiding the undesirable phenomenon of "sinking" of the rear hanging component 40 due to the excessive gap between the elastic sheathing body 43 and the elastic metal wire 41, especially when the user presses the rear hanging component 40, thereby increasing the structural compactness of the rear hanging component 40.

[0144] In this embodiment, the number of the wires 42 may be at least two. Each wire 42 may include a metal wire and an insulating layer ( Fig.28 The insulating layer is mainly used to achieve electrical insulation between metal wires.

[0145] It should be noted that: Figure 1 , Figure 2 , Figure 4 , Figure 8 and Fig.16 As shown, the main control circuit board 50 and the battery 60 can be respectively arranged in the two ear hook components 30, and Figure 2 and Figure 4 The ear hook assembly 30 shown can correspond to the left ear hook and the right ear hook of the bone conduction headset 10 respectively, so that not only the main control circuit board 50 and the battery 60 need to be connected via the wire 42 built into the rear cover assembly 40, but also the ear hook 42 corresponding to the left ear hook and the right ear hook of the bone conduction headset 10 respectively. Figure 1 The movement module 20 (specifically, the movement 22) and the button 36 of the middle (left) ear hook assembly 30 need to be further connected to the corresponding Figure 1 The main control circuit board 50 of the middle (right) ear hook assembly 30 is connected, corresponding to Figure 1 The core module 20 (specifically, the core 22, the first microphone 25 and the second microphone 26) of the middle (right) ear hook assembly 30 also needs to be further connected to the corresponding Figure 1 The battery 60 of the middle (left) ear hook assembly 30 is connected. Therefore, the wire 42 needs to realize at least the connection of the above three circuits.

[0146] Based on the above detailed description, the rear hanging assembly 40 of the embodiment of the present application can be manufactured according to the following process flow:

[0147] 1) Provide an extrusion molding device and a wire.

[0148] On the one hand, the extrusion molding equipment can be added with raw materials for molding the elastic coating 43. In the extrusion molding process, the raw materials of the elastic coating 43 at least go through the stages of melting and plasticization, die extrusion, shaping, cooling, and pulling.

[0149] On the other hand, the number of the wires 42 can be at least two, so as to realize the connection between the various electronic components in the bone conduction earphone 10. Furthermore, each wire 42 can include a metal wire and an insulating layer covering the metal wire, so as to realize electrical insulation between the metal wires.

[0150] 2) placing the wire in an extrusion molding device so that the raw material of the elastic coating and the wire can obtain a corresponding first semi-finished product during the extrusion molding process.

[0151] The extrusion molding device can pull the wire 42 so that the elastic coating 43 can be coated on the wire 42 during the extrusion molding process. Furthermore, the head portion of the extrusion molding device can be provided with a core so that the elastic coating 43 can simultaneously form the above-mentioned threading channel inside during the extrusion molding process. Therefore, the above-mentioned first semi-finished product can specifically be an integrated structure of the elastic coating 43 and the wire 42, and the coating 43 has a threading channel extending generally along its axial direction.

[0152] 3) According to the use requirements of the rear hanging component, the first semi-finished product is further cut into second semi-finished products with corresponding lengths.

[0153] The actual length of the second semi-finished product may be slightly greater than its use length for the rear hanging component, that is, the second semi-finished product still has a certain margin at this time to facilitate subsequent processing steps.

[0154] 4) Passing the elastic metal wire through the threading channel of the second semi-finished product to obtain a rear hanging assembly.

[0155] Among them, after step 4), not only does the rear hanging component need to be formed into a curved structure with a certain shape so that it can fit the back of the user's head, but it also needs to be processed at both ends of the rear hanging component so that it can be structurally fixedly connected with the ear hanging component and realize the circuit connection between the main control circuit board, battery, button, movement, first and second microphones. Therefore, the rear hanging component obtained in step 4) is essentially only a semi-finished product.

[0156] In the above manner, due to the extrusion molding process, not only a very long semi-finished product (specifically, an integral structure of the elastic sheath 43 and the conductor 42) can be produced at one time, but also a threading channel extending generally along its axial direction can be formed inside the sheath 43 at the same time, and then the semi-finished product is cut into small sections of corresponding lengths for subsequent processing, so that the production efficiency of the rear hanging assembly can be effectively improved.

[0157] The above descriptions are only some embodiments of the present application, and are not intended to limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A bone conduction headset, It is characterized in that The bone conduction earphone comprises an ear hook component, a back hook component and a movement module, wherein the movement module is arranged at one end of the ear hook component, and the end of the ear hook component away from the movement module is connected to the back hook component, the ear hook component comprises an ear hook shell, the movement module comprises a movement shell, a movement and a cover plate, one end of the movement shell is open, the cover plate is covered on the open end of the movement shell to form a cavity structure for accommodating the movement, and the ear hook shell is connected to the cover plate; wherein the elastic modulus of the movement shell is greater than the elastic modulus of the ear hook shell, and the elastic modulus of the cover plate is greater than the elastic modulus of the ear hook shell.

2. The bone conduction earphone according to claim 1, It is characterized in that The elastic modulus of the cover plate is less than or equal to the elastic modulus of the movement housing.

3. The bone conduction earphone according to claim 2, It is characterized in that The movement housing includes a bottom wall and an annular circumferential wall, one end of the annular circumferential wall is integrally connected to the bottom wall, the cover plate is covered on the other end of the annular circumferential wall and arranged opposite to the bottom wall, and the bottom wall is used to contact the user's skin; wherein the ratio of the difference between the stiffness of the bottom wall and the stiffness of the cover plate to the stiffness of the bottom wall is less than or equal to 10%.

4. The bone conduction earphone according to claim 3, It is characterized in that The area of ​​the bottom wall is smaller than or equal to the area of ​​the cover plate, and the thickness of the bottom wall is smaller than or equal to the thickness of the cover plate.

5. The bone conduction earphone according to claim 3, It is characterized in that The material of the cover plate is the same as that of the movement housing, and the ratio of the thickness to the area of ​​the cover plate to the ratio of the thickness to the area of ​​the bottom wall is greater than or equal to 90%.

6. The bone conduction earphone according to claim 5, It is characterized in that The ratio of the thickness to the area of ​​the bottom wall is equal to the ratio of the thickness to the area of ​​the cover plate.

7. The bone conduction earphone according to claim 1, It is characterized in that The ear hook shell includes a accommodating chamber, a bent transition portion and an earphone fixing portion, the accommodating chamber is used to accommodate a battery or a main control circuit board, the bent transition portion connects the accommodating chamber and the earphone fixing portion, and is arranged in a bent shape so as to be hung on the outside of a human ear, and the earphone fixing portion is covered on a side of the cover plate away from the movement shell.

8. The bone conduction earphone according to claim 7, It is characterized in that The earphone fixing part and the cover plate are connected by gluing or a combination of clamping and gluing.

9. The bone conduction earphone according to claim 8, It is characterized in that The earphone fixing part fully covers the cover plate, and the filling degree of the colloid arranged between the earphone fixing part and the cover plate is greater than or equal to 90%.

10. The bone conduction earphone according to claim 7, It is characterized in that A button accommodating groove is further provided on the side of the cover plate facing away from the movement shell, the ear hook assembly further includes a button and a decorative part, the decorative part includes a decorative bracket, the decorative bracket is assembled and fixed on one side of the ear hook shell, the earphone fixing part is provided with a button adaptation hole, the button is provided in the button accommodating groove and exposed through the button adaptation hole, the decorative bracket further extends in a cantilever form to above the button exposed through the button adaptation hole, and can trigger the button when pressed by external force.

11. The bone conduction earphone according to claim 7, It is characterized in that A microphone accommodating groove is further provided on the side of the cover plate facing away from the movement housing, and the movement module further includes a first microphone and a second microphone, the first microphone is accommodated in the movement housing, and the second microphone is arranged in the microphone accommodating groove and covered by the earphone fixing part.

12. The bone conduction earphone according to claim 1, It is characterized in that The ear hook shell is made of any one of polycarbonate, polyamide, and acrylonitrile-butadiene-styrene copolymer, and the movement shell and the cover plate are made of a mixture of polycarbonate and glass fiber and / or carbon fiber.

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