Earphone, assembly jig, and manufacturing method of earphone

Abstract

The application provides an earphone, which has a central symmetry shape; the earphone comprises an earphone front shell, an earphone magnet, a first electrode and a second electrode; the earphone magnet is in a ring structure surrounding the center line of the earphone, and is fixed to the inner wall of the earphone front shell; the first electrode and the second electrode are both located on the outer side of the earphone, and are both in a ring structure surrounding the center line of the earphone, and the first electrode and the second electrode are respectively fixed to the opposite ends of the earphone front shell. The application also provides an assembling jig and a manufacturing method of the earphone. The scheme of the application can enable the user to wear the earphone at a relatively random angle and put the earphone into an earphone box, reduces the operation limitation on the user, and improves the user experience.

Description

Technical Field

[0001] This application relates to the field of electronic devices, and more particularly to an earphone, an assembly fixture, and a method for manufacturing the earphone. Background Technology

[0002] Existing true wireless stereo (TWS) earbuds with stem-style earbuds require users to wear them at a specific angle for proper fit, and also require a specific angle to place them in the charging case. This design causes some inconvenience for users. Summary of the Invention

[0003] This application provides an embodiment of headphones, an assembly fixture, and a method for manufacturing headphones, allowing users to wear the headphones at more flexible angles and place them in the headphone case, reducing operational restrictions on users and improving user experience.

[0004] Firstly, this application provides an earphone with a centrally symmetrical shape. The earphone includes a front shell, a magnet, a first electrode, and a second electrode. The magnet is a ring-shaped structure surrounding the center line of the earphone and is fixed to the inner wall of the front shell. Both the first and second electrodes are located on the outer side of the earphone and are also ring-shaped structures surrounding the center line. The first and second electrodes are fixed to opposite ends of the front shell. The shape of this earphone allows it to be worn and placed in a charging case at relatively arbitrary angles, while ensuring normal charging from the charging case. Furthermore, by designing a magnet with a ring-shaped structure surrounding the center line, the magnet can magnetically attract the magnet inside the charging case. When the user places the earphone in the case, the magnetic force automatically positions it, allowing the user to place it in the correct position without precise alignment. Therefore, this earphone improves the user experience.

[0005] In one implementation of the first aspect, the first electrode is either a closed ring structure or an open ring structure. This electrode design ensures that the earphones can charge normally regardless of where they are placed.

[0006] In one implementation of the first aspect, the first electrode has an open ring structure, and there are at least two first electrodes, which are arranged in pairs at intervals and distributed on the same circumference. This electrode design ensures that the earphones can be charged normally regardless of where they are placed.

[0007] In one implementation of the first aspect, the earphone includes a first earphone circuit board assembly. The earphone front shell has a through hole, and the first earphone circuit board assembly is installed inside the earphone front shell. The first electrode includes a connected electrode body and a conductive portion. The conductive portion of the first electrode is disposed on the inner surface of the electrode body of the first electrode. The electrode body of the first electrode is fixed to the outer surface of one end of the earphone front shell. The conductive portion of the first electrode passes through the through hole of the earphone front shell and is electrically connected to the circuit board in the first earphone circuit board assembly inside the earphone front shell. This design enables reliable mechanical and electrical connection of the first electrode.

[0008] In one implementation of the first aspect, the earphone includes an earphone back shell and a second earphone circuit board assembly; the second electrode includes a connected electrode body and a conductive portion, the conductive portion of the second electrode being disposed on the inner surface of the electrode body of the second electrode; the electrode body of the second electrode connects the earphone back shell and the earphone front shell, and the second earphone circuit board assembly is located within the space enclosed by the electrode body of the second electrode and the earphone back shell; the conductive portion of the second electrode is electrically connected to the circuit board in the second earphone circuit board assembly. This design enables reliable mechanical and electrical connections for the second electrode.

[0009] In one implementation of the first aspect, the earphone magnet is a single magnet with a closed loop structure; or, there are at least two earphone magnets, spaced apart, each earphone magnet having an open loop structure. By designing an earphone magnet with a loop structure surrounding the center line of the earphone, the earphone magnet can be magnetically attracted to the magnet inside the earphone case. When the user places the earphone into the earphone case, the magnetic attraction can automatically position the earphone, allowing the user to place the earphone in place without precise alignment.

[0010] In one implementation of the first aspect, the earphone includes a first earphone circuit board assembly, an earbud holder, and a front vent acoustic mesh. The first earphone circuit board assembly is installed inside the earphone front shell, and a first electrode is electrically connected to the circuit board in the first earphone circuit board assembly. The earbud holder has a hollow cylindrical structure, with a through hole at one end and a front vent hole on its wall, connecting the inner and outer spaces of the earbud holder. The front vent acoustic mesh includes a fixing area and a blocking area, with the blocking area connected to one side of the fixing area. The fixing area is bonded to one end of the earbud holder facing away from the through hole and to the earphone front shell. The blocking area is bonded to the inner wall of the earbud holder and blocks the front vent hole, allowing sound wave signals to pass through. The front vent acoustic mesh of this solution serves both to fix the earbud holder to the earphone front shell and to provide acoustic adjustment.

[0011] In one implementation of the first aspect, the earphone includes a first earphone circuit board assembly, an earbud holder, a speaker, and a secondary microphone; the earphone front shell has a pickup channel; the first earphone circuit board assembly is installed inside the earphone front shell; a first electrode is electrically connected to the circuit board in the first earphone circuit board assembly; the earbud holder is a hollow cylindrical structure, one end of the earbud holder has a through hole, and the wall of the earbud holder has a front vent hole that connects the inner and outer spaces of the earbud holder; the end of the earbud holder facing away from the through hole is fixed to the earphone front shell, and the inner cavity of the earbud holder is connected to the pickup channel; at least a portion of the speaker is located in the inner cavity of the earbud holder, and the speaker is electrically connected to the circuit board in the first earphone circuit board assembly; the sound wave signal emitted by the speaker can be propagated to the outside of the earphone through the through hole of the earbud holder; the secondary microphone is arranged on the circuit board in the first earphone circuit board assembly; the secondary microphone is used to pick up noise signals that enter the inner cavity of the earbud holder and the pickup channel through the through hole of the earbud holder; the speaker is used to generate an inverse signal with the opposite phase to the noise signal to achieve active noise cancellation. This solution, through reasonable structural design, can achieve active noise cancellation of the earphone.

[0012] In one implementation of the first aspect, the speaker is also used to emit a sound wave signal of a specific frequency, and the secondary microphone is also used to pick up the sound wave signal of the specific frequency; the headphones include a controller, which is used to determine whether the headphones are being worn based on the signal strength of the sound wave signal of the specific frequency picked up by the secondary microphone. This solution achieves the wear detection function by reusing the secondary microphone, which is beneficial for the compact design of the internal stacking of the headphones and saves internal stacking space.

[0013] In one implementation of the first aspect, the earphone includes a first earphone circuit board assembly, an earbud holder, and a wear detection electrode plate; the first earphone circuit board assembly is installed inside the earphone front shell; a first electrode is electrically connected to the circuit board in the first earphone circuit board assembly; one end of the earbud holder is fixedly connected to the earphone front shell; the earbud holder is made of a conductive material; the wear detection electrode plate is located inside the earphone front shell, connected to the end of the earbud holder near the earphone front shell, and electrically connected to the circuit board in the first earphone circuit board assembly; both the wear detection electrode plate and the earbud holder are used to generate coupling capacitance when close to a human body; the earphone includes a controller, which is used to determine whether the earphone is being worn based on the value of the coupling capacitance.

[0014] In this solution, by using both the wear detection plate and the earbud holder as the detection plate for wear detection, the area of ​​the detection plate can be increased, which helps to ensure the consistency and reliability of wear detection. Since the earbud holder is closer to the inside of the ear canal than the wear detection plate, the capacitance detection data from the earbud holder is more accurate and reliable, thus improving the overall reliability of wear detection. At the same time, reusing the earbud holder as the detection plate for wear detection does not affect the overall size of the earphone and saves internal stacking space.

[0015] In one implementation of the first aspect, the earphone includes a first earphone circuit board assembly, on which a wear detection sensor is disposed; a first electrode is electrically connected to the circuit board in the first earphone circuit board assembly; the earphone includes a controller for determining whether the earphone is being worn based on the detection signal from the wear detection sensor.

[0016] In one implementation of the first aspect, the earphone includes an earbud support and an earbud; the earbud includes a connected inner earbud cover and an outer earbud cover, the inner earbud cover being fitted around the outer periphery of the earbud support, and the outer earbud cover surrounding the outer periphery of the inner earbud cover; a first protrusion is provided on the surface of the outer earbud cover facing the inner earbud cover; a first electrode is located between the earbud and a second electrode. The first protrusion can enhance the structural strength of the outer earbud cover and reduce the "stethoscope effect".

[0017] In one implementation of the first aspect, the earphone includes an earbud support and an earbud; the earbud support is a hollow cylindrical structure, and the wall of the earbud support has a front vent hole that connects the inner and outer spaces of the earbud support; a skirt is formed on the outer periphery of the earbud support, and the front vent hole is adjacent to the skirt; the earbud includes a connected earbud outer cover and an earbud inner cover; the earbud inner cover is fitted over the outer periphery of the earbud support, and the skirt protrudes outside the earbud inner cover; a second protrusion is provided on the surface of the earbud inner cover facing the skirt, and the second protrusion contacts the skirt; the earbud outer cover surrounds the outer periphery of the earbud inner cover; a first electrode is located between the earbud and the second electrode. The design that makes the second protrusion contact the skirt of the earbud support can prevent the earbud from blocking the front vent hole, thus ensuring the acoustic performance of the earphone.

[0018] In one implementation of the first aspect, the earphone includes an earphone back shell, a third earphone circuit board assembly, and a main microphone. The back shell has a sound pickup hole and at least two wind noise reduction holes, both of which connect to the inner and outer spaces of the back shell. The third earphone circuit board assembly is located inside the earphone back shell. A second electrode connects the earphone back shell and the earphone front shell. The main microphone is disposed on the circuit board of the third earphone circuit board assembly. The main microphone is used to pick up sound wave signals entering the back shell through the sound pickup holes. By designing multiple wind noise reduction holes, wind noise interference can be reduced.

[0019] Secondly, this application provides an earphone with a centrally symmetrical shape. The earphone includes a rear shell, a third earphone circuit board assembly, an antenna, a controller, and a switching circuit. The third earphone circuit board assembly has two feed points on its circuit board and is located inside the rear shell. The antenna is located inside the rear shell and is a common-mode antenna. The antenna includes a first antenna stub and a second antenna stub, which are spaced apart. Both the first and second antenna stubs have feed terminals, which are connected to a feed point respectively. The first and second antenna stubs are coupled to allow the antenna to operate in a set frequency band. The controller determines which of the two antenna stubs has better signal quality and controls the switching circuit to switch the antenna stub with better signal quality to the feed terminal and the other antenna stub to the ground terminal. In this solution, through the above-mentioned switching design, the communication quality of the earphone can be guaranteed when the earphone is worn by the user at any angle, ensuring a good user experience.

[0020] In one implementation of the second aspect, the earphone back cover includes a bottom wall and a peripheral side wall; the peripheral side wall surrounds the periphery of the bottom wall and forms an open cavity with the bottom wall; the first antenna stub includes a first segment and a second segment that are bent and connected, and the feed end of the first antenna stub is the end of the first segment away from the second segment; the first segment is fixed to the peripheral side wall, and the second segment is fixed to the bottom wall. This solution allows the antenna structure to be adapted to the structure of the earphone back cover, and can make reasonable use of the space of the earphone back cover for layout.

[0021] In one implementation of the second aspect, the second segment is bent, extending from the end of the second segment closer to the first segment to the end of the second segment farther from the first segment. The second segment extends along a direction from the peripheral sidewall to the bottom wall, or vice versa. This solution, through a reasonable design of the antenna topology, ensures antenna performance.

[0022] In one implementation of the second aspect, the second antenna stub includes a bent and connected third and fourth segment. The feed end of the second antenna stub is the end of the third segment furthest from the fourth segment. The third segment is fixed to the peripheral sidewall, and the fourth segment is fixed to the bottom wall. The fourth segment is bent, extending from the end of the fourth segment closest to the third segment to the end of the fourth segment furthest from the third segment. The fourth segment extends along the direction from the peripheral sidewall to the bottom wall, or along the direction from the bottom wall to the peripheral sidewall. This scheme, through a reasonable design of the antenna topology, can ensure the antenna performance.

[0023] In one implementation of the second aspect, both the first antenna stub and the second antenna stub have ends. The end of the first antenna stub and its feed point are opposite ends of the first antenna stub, and the end of the second antenna stub and its feed point are opposite ends of the second antenna stub, respectively. The end or feed point of the first antenna stub is coupled to the end or feed point of the second antenna stub. This scheme, through a reasonable design of the antenna coupling method, can ensure the antenna performance.

[0024] In one implementation of the second aspect, the two feed points on the circuit board of the third earphone circuit board assembly are symmetrical about the centerline of the earphone. This scheme makes the feed ends of the two antenna stubs substantially centrally symmetrical, ensuring the performance consistency of the two antenna stubs and thus guaranteeing the communication quality of the earphone.

[0025] Thirdly, this application provides an assembly fixture for the earphone. The earphone includes an earphone front shell and at least two earphone magnets. The assembly fixture includes a base, fixture magnets, and a top cover. The base has a workpiece positioning groove and a fixture magnet mounting groove. The workpiece positioning groove is used to accommodate the earphone front shell. The number of fixture magnet mounting grooves is the same as the number of earphone magnets, and all fixture magnet mounting grooves are spaced apart on the outside of the workpiece positioning groove and are all connected to the workpiece positioning groove. The number of fixture magnets is the same as the number of earphone magnets, and one fixture magnet is installed in one fixture magnet mounting groove. The top cover includes a cover plate and a top cover limiting post. The cover plate has magnet placement through holes, the number of which is the same as the number of earphone magnets, and the axis of each magnet placement through hole is along the thickness direction of the cover plate. The top cover limiting post is connected to one side of the cover plate in the thickness direction, and the top cover limits... The positioning post has limiting parts, the number of which matches the number of earphone magnets. The projection of one limiting part onto the axis of the magnet placement through hole corresponds to one magnet placement through hole. The top cover and base are detachably connected, with the cover plate contacting the base. The projections of different areas of the workpiece positioning groove onto the axis of the magnet placement through hole respectively fall into each magnet placement through hole. The limiting post of the top cover extends into the workpiece positioning groove, and each limiting part is spaced apart from the side wall of the workpiece positioning groove. Each limiting part is used to form a gap with the inner wall of the earphone front shell positioned in the workpiece positioning groove. Each magnet placement through hole is used to allow one earphone magnet to be placed into the assembly fixture, and each gap is used to allow one earphone magnet entering the assembly fixture to be placed into the earphone front shell. Each fixture magnet is used to magnetically attract one earphone magnet placed in the earphone front shell. This solution, through the design of the assembly fixture, can accurately, reliably, and conveniently install earphone magnets into the earphone front shell.

[0026] In one implementation of the third aspect, all fixture magnet mounting slots are evenly distributed at equal intervals on the outer side of the workpiece positioning slot. This design ensures that the magnetic attraction force of the fixture magnets on each earphone magnet is uniform and consistent.

[0027] In one implementation of the third aspect, the base is provided with a top cover positioning hole, and the top cover includes a top cover positioning post connected to the cover plate, with the top cover positioning post and the top cover limiting post located on the same side of the cover plate; when the top cover and the base are detachably connected, the top cover positioning post is inserted into the top cover positioning hole. This design can ensure a reliable connection between the top cover and the base.

[0028] In one implementation of the third aspect, the base has a base magnet, and the upper cover includes an upper cover magnet fixed to the cover plate; when the upper cover and the base are detachably connected, the upper cover magnet and the base magnet are magnetically attracted. This design ensures a reliable connection between the upper cover and the base.

[0029] In one implementation of the third aspect, the base is provided with a fixture receiving groove, which communicates with a workpiece positioning groove; the assembly fixture includes a fixture, a part of which is used to hold the earphone front shell; when the top cover and the base are detachably connected, a part of the fixture and the earphone front shell held by the fixture are both housed in the workpiece positioning groove, and the other part of the fixture is housed in the fixture receiving groove. This solution can use the fixture to hold the earphone front shell, making it easy to place the earphone front shell into the assembly fixture. In addition, this fixture can also be used for other assembly stations of the earphone.

[0030] Fourthly, this application provides a method for manufacturing an earphone, using the aforementioned assembly fixture to assemble at least two earphone magnets within the earphone front shell of the earphone; the manufacturing method includes: positioning the earphone front shell within the workpiece positioning groove of the assembly fixture; installing the upper cover of the assembly fixture onto the base, such that the cover plate contacts the base, and the projections of different areas of the earphone front shell onto the axial direction of the magnet placement through-hole fall into each magnet placement through-hole, such that the upper cover limiting post extends into the earphone front shell, and each limiting part forms a gap with the inner wall of the earphone front shell; installing all earphone magnets into the earphone front shell, wherein one earphone magnet is installed into a corresponding position within the earphone front shell through a magnet placement through-hole and a gap corresponding to the magnet placement through-hole, and a fixture magnet attracts one earphone magnet corresponding to the fixture magnet to the inner wall of the earphone front shell; removing the upper cover from the base; fixing each earphone magnet to the inner wall of the earphone front shell; and removing the earphone front shell containing the earphone magnets from the base. This solution enables accurate, reliable, and convenient installation of the headphone magnet into the headphone front shell.

[0031] In one implementation of the fourth aspect, each earphone magnet is fixedly connected to the inner wall of the earphone front shell, including: bonding each earphone magnet to the inner wall of the earphone front shell using an adhesive dispensing process. This solution can reliably fix the earphone magnet inside the earphone front shell. Attached Figure Description

[0032] Figure 1This is a schematic diagram of the assembly structure of the wearable device in the embodiments of this application;

[0033] Figure 2 This is a schematic diagram of the assembly structure of the wearable device in the embodiments of this application;

[0034] Figure 3 This is a schematic diagram of the assembly structure of the wearable device in the embodiments of this application;

[0035] Figure 4 This is a schematic diagram of the assembly structure of the wearable device in the embodiments of this application;

[0036] Figure 5 This is a schematic diagram of the assembly structure of the wearable device in the embodiments of this application;

[0037] Figure 6 This is an exploded view of the wearable device in the embodiments of this application;

[0038] Figure 7 yes Figure 6 A schematic diagram of the assembly structure of the first main unit housing of the wearable device in the diagram;

[0039] Figure 8 yes Figure 7 An exploded view of the first main unit casing;

[0040] Figure 9 yes Figure 6 A schematic diagram of the assembly structure of the first main unit housing of the wearable device in the diagram;

[0041] Figure 10 yes Figure 8 A schematic diagram of the assembly structure of the locking part of the first main unit housing;

[0042] Figure 11 yes Figure 8 An exploded structural diagram of the magnet assembly of the first main unit casing;

[0043] Figure 12 yes Figure 8 A schematic diagram of the sealing bracket of the first main unit housing;

[0044] Figure 13 yes Figure 9 A schematic diagram of the AA cross-sectional structure of the first main unit casing in the diagram;

[0045] Figure 14 yes Figure 13 A magnified schematic diagram of the local structure at point B;

[0046] Figure 15 yes Figure 6 A schematic diagram of the structure of the first host circuit board assembly of the wearable device in the diagram;

[0047] Figure 16 yes Figure 6 A schematic diagram of the structure of the second main housing of the wearable device in the diagram;

[0048] Figure 17 yes Figure 6 A schematic diagram of the structure of the second main housing of the wearable device in the diagram;

[0049] Figure 18 yes Figure 17 An exploded view of the second main unit casing;

[0050] Figure 19 yes Figure 16 A schematic diagram of the structure of the second bracket of the second main unit housing;

[0051] Figure 20 This is a schematic diagram of the assembly structure of the second main unit casing and the main unit battery;

[0052] Figure 21 yes Figure 6 A schematic diagram of the assembly structure of the third host housing of the wearable device in the diagram;

[0053] Figure 22 yes Figure 6 A schematic diagram of the assembly structure of the third host housing of the wearable device in the diagram;

[0054] Figure 23 yes Figure 22 A magnified schematic diagram of the partial structure at point A in the middle;

[0055] Figure 24 yes Figure 6 A schematic diagram of the assembly structure of the third host housing of the wearable device in the diagram;

[0056] Figure 25 yes Figure 6 A schematic diagram of the assembly structure of the power button for a wearable device.

[0057] Figure 26 yes Figure 25 A schematic diagram of the exploded structure of the on-key in the image;

[0058] Figure 27 yes Figure 25 A schematic diagram of the keycap structure of the power button in the image;

[0059] Figure 28 yes Figure 25 A schematic diagram of the button bracket for the power button in the image;

[0060] Figure 29 yes Figure 25 A schematic diagram of the tactile spring of the activation button in the middle;

[0061] Figure 30 This is a schematic diagram of the assembly structure of the power button and the third host housing;

[0062] Figure 31 yes Figure 30 A schematic diagram of the AA cross-sectional structure;

[0063] Figure 32 This is a schematic diagram of the assembly structure of the power button and the first main unit casing;

[0064] Figure 33 yes Figure 32 A magnified schematic diagram of the local structure at point B;

[0065] Figure 34 This is a schematic diagram of the assembly structure of the second main unit housing, the third main unit housing, and the power button;

[0066] Figure 35 yes Figure 6 A schematic diagram of the assembly structure of the fourth main unit housing of the wearable device in the diagram;

[0067] Figure 36 yes Figure 6 A schematic diagram of the assembly structure of the fourth main unit housing of the wearable device in the diagram;

[0068] Figure 37 yes Figure 36 A schematic diagram of the exploded structure of the fourth main unit casing;

[0069] Figure 38 yes Figure 6 A schematic diagram of the assembly structure of the hinge assembly of a wearable device.

[0070] Figure 39 yes Figure 38 A schematic diagram of the AA cross-sectional structure;

[0071] Figure 40 yes Figure 38 An exploded view of the rotating shaft assembly in the diagram;

[0072] Figure 41 This is a structural diagram of the bushing in the rotating shaft assembly;

[0073] Figure 42 yes Figure 41 A schematic diagram of the BB cross-sectional structure of the bushing;

[0074] Figure 43 This is a structural diagram of the bushing in the rotating shaft assembly;

[0075] Figure 44 This is a structural diagram of the bushing in the rotating shaft assembly;

[0076] Figure 45 This is a structural diagram of the protrusion mating component in the rotating shaft assembly;

[0077] Figure 46 This is a structural diagram of the driven component in the rotating shaft assembly;

[0078] Figure 47 yes Figure 46 A schematic diagram of the AA section of the driven component;

[0079] Figure 48 This is a structural diagram of the driven component in the rotating shaft assembly;

[0080] Figure 49 This is a schematic diagram of the structure of the gasket in the rotating shaft assembly;

[0081] Figure 50 This is a schematic diagram of the structure of the gasket in the rotating shaft assembly;

[0082] Figure 51 This is a structural diagram of the first shaft in the rotating shaft assembly;

[0083] Figure 52 This is a structural diagram of the first shaft in the rotating shaft assembly;

[0084] Figure 53 This is a structural diagram of the first shaft in the rotating shaft assembly;

[0085] Figure 54 This is a schematic diagram of the assembly structure of the first shaft, driven component, and elastic component in the rotating shaft assembly;

[0086] Figure 55 This is a structural diagram of the limiting component in the rotating shaft assembly;

[0087] Figure 56 This is a structural diagram of the second shaft in the rotating shaft assembly;

[0088] Figure 57 This is a structural diagram of the second shaft in the rotating shaft assembly;

[0089] Figure 58 This is a structural diagram of the second shaft in the rotating shaft assembly;

[0090] Figure 59 This is a schematic diagram of the flexible circuit board in the pivot assembly;

[0091] Figure 60 This is a schematic diagram of the flexible circuit board in the pivot assembly;

[0092] Figure 61 This is a schematic diagram of the flexible circuit board in the pivot assembly;

[0093] Figure 62This is a schematic diagram of the assembly structure of the second shaft and the flexible circuit board in the rotating shaft assembly;

[0094] Figure 63 This is a schematic diagram of the assembly structure of the second shaft and the flexible circuit board in the rotating shaft assembly;

[0095] Figure 64 This is a schematic diagram of the assembly structure of the pivot assembly;

[0096] Figure 65 This is a structural diagram of the clamping component in the rotating shaft assembly;

[0097] Figure 66 This is a schematic diagram of the assembly structure of the pivot assembly;

[0098] Figure 67 This is a cross-sectional view of the shaft assembly;

[0099] Figure 68 This is a schematic diagram of the assembly structure of the rotating shaft assembly and the third main unit housing;

[0100] Figure 69 This is a schematic diagram of the assembly structure of the pivot assembly, the third main housing, and the second main housing;

[0101] Figure 70 This is a schematic diagram of the assembly structure of the pivot assembly, the third main housing, the second main housing, and the first main housing;

[0102] Figure 71 yes Figure 70 A magnified schematic diagram of the partial structure at point A in the middle;

[0103] Figure 72 This is a schematic diagram of the assembly structure of the main unit in a wearable device;

[0104] Figure 73 This is a partial cross-sectional view of the assembly structure of the main unit in a wearable device;

[0105] Figure 74 This is a cross-sectional view of the shaft assembly;

[0106] Figure 75 yes Figure 74 A magnified schematic diagram of the local structure at point B;

[0107] Figure 76 yes Figure 75 A schematic diagram of the AA cross-sectional structure shown;

[0108] Figure 77 This is a schematic diagram of the mating structure of the first shaft, driven component, and elastic component in the rotating shaft assembly;

[0109] Figure 78This is a structural diagram showing the fit between the bushing and the convex mating part in the rotating shaft assembly;

[0110] Figure 79 This is a schematic diagram of the mating structure of the first shaft, driven component, and elastic component in the rotating shaft assembly;

[0111] Figure 80 This is a structural diagram showing the fit between the bushing and the convex mating part in the rotating shaft assembly;

[0112] Figure 81 This is a schematic diagram of the mating structure of the first shaft, driven component, and elastic component in the rotating shaft assembly;

[0113] Figure 82 This is a structural diagram showing the fit between the bushing and the convex mating part in the rotating shaft assembly;

[0114] Figure 83 This is a structural diagram of the main unit when the first part of the main unit is opened to its limit relative to the second part;

[0115] Figure 84 yes Figure 83 A magnified schematic diagram of the partial structure at point A in the middle;

[0116] Figure 85 yes Figure 6 A schematic diagram of the assembly structure of the first earphone of the wearable device in the image;

[0117] Figure 86 yes Figure 85 An exploded view of the first earphone in the diagram;

[0118] Figure 87 This is a schematic diagram of the assembly structure of the earphone front shell assembly in the first earphone;

[0119] Figure 88 This is a schematic diagram of the assembly structure of the earphone front shell assembly in the first earphone;

[0120] Figure 89 This is an exploded structural diagram of the front shell assembly of the first earphone;

[0121] Figure 90 yes Figure 88 A schematic diagram of the AA cross-sectional structure of the earphone front shell assembly;

[0122] Figure 91 This is a schematic diagram of the structure in which the clamp holds the intermediate component;

[0123] Figure 92 This is an exploded view of the assembly fixture according to an embodiment of this application;

[0124] Figure 93 This is a structural diagram of the base of the assembly fixture;

[0125] Figure 94 This is a structural diagram of the base of the assembly fixture;

[0126] Figure 95 This is a schematic diagram of the structure of the upper cover of the assembly fixture;

[0127] Figure 96 This is a schematic diagram of the structure of the upper cover of the assembly fixture;

[0128] Figure 97 This is a schematic diagram of the structure where the fixture and intermediate components are placed in the base;

[0129] Figure 98 This is a schematic diagram of the structure for fitting the top cover to the base;

[0130] Figure 99 This is a schematic diagram of the fit between the top cover and the base;

[0131] Figure 100 yes Figure 99 A magnified schematic diagram of the partial structure at point A in the middle;

[0132] Figure 101 This is a schematic diagram of the structure for installing the headphone magnet into the assembly fixture;

[0133] Figure 102 This is a schematic diagram of the structure of the first electrode of the first earphone;

[0134] Figure 103 This is a structural diagram of the earbud support assembly of the first earphone;

[0135] Figure 104 This is a structural diagram of the earbud support assembly of the first earphone;

[0136] Figure 105 This is an exploded view of the earbud support assembly;

[0137] Figure 106 This is a structural diagram of the earbud support in the earbud support assembly;

[0138] Figure 107 This is a schematic diagram of the earbud structure of the first earphone;

[0139] Figure 108 This is a schematic diagram of the earbud structure of the first earphone;

[0140] Figure 109 yes Figure 108 A schematic diagram of the AA cross-sectional structure of the earplug in the picture;

[0141] Figure 110 This is a schematic diagram of the structure of several sound pickup holes in the inner cover of an earbud;

[0142] Figure 111 This is a schematic diagram of the structure of the second electrode of the first earphone;

[0143] Figure 112 This is an exploded structural diagram of the earphone back shell assembly of the first earphone;

[0144] Figure 113 This is a schematic diagram of the assembly structure of the headphone back shell assembly;

[0145] Figure 114 This is a structural diagram of the earphone back shell in the earphone back shell assembly;

[0146] Figure 115 yes Figure 112 A schematic diagram of the AA cross-sectional structure of the earphone back shell;

[0147] Figure 116 This is a schematic diagram of an antenna structure in the back shell assembly of an earphone.

[0148] Figure 117 This is a schematic diagram of another structure of the antenna in the earphone back shell assembly;

[0149] Figure 118 This is a schematic diagram of another structure of the antenna in the earphone back shell assembly;

[0150] Figure 119 This is a structural diagram of the rear shell support in the headphone rear shell assembly;

[0151] Figure 120 yes Figure 113 A schematic diagram of the BB cross-sectional structure of the earphone back shell assembly;

[0152] Figure 121 This is a cross-sectional structural diagram of the first earphone;

[0153] Figure 122 yes Figure 121 A magnified schematic diagram of the partial structure at point A in the middle;

[0154] Figure 123 This is a schematic diagram of another type of first earphone;

[0155] Figure 124 This is a schematic diagram of another type of first earphone;

[0156] Figure 125 This is a schematic diagram of the electronic components in the first earphone;

[0157] Figure 126 This is a schematic diagram of the electronic components in the first earphone;

[0158] Figure 127 This is a cross-sectional structural diagram of the first earphone;

[0159] Figure 128 yes Figure 127 A magnified schematic diagram of the partial structure at point A in the middle;

[0160] Figure 129 yes Figure 127 A magnified schematic diagram of the local structure at point B;

[0161] Figure 130 This is a schematic diagram showing the interaction between the first host magnet in the host and the earphone magnet in the first earphone.

[0162] Figure 131 This is a schematic diagram of a magnet design for the first host magnet and the earphone magnet;

[0163] Figure 132 This is a schematic diagram of another magnet design for the first host magnet and the earphone magnet;

[0164] Figure 133 This is a schematic diagram of another magnet design for the first host magnet and the earphone magnet;

[0165] Figure 134 This is a schematic diagram of another magnet design for the first host magnet and the earphone magnet;

[0166] Figure 135 This is a schematic diagram of the design of the first host magnet magnetically attracting the first and second electrodes in the earphone.

[0167] Figure 136 This is a schematic diagram showing the structure where the first earphone is attached to the first part after the host is turned on;

[0168] Figure 137 This is a schematic diagram illustrating the process of the first earphone automatically returning to its original position when it is played from the main unit to the first part;

[0169] Figure 138 This is a schematic diagram illustrating the process of the first earphone automatically returning to its original position when it is played from the main unit to the first part;

[0170] Figure 139 This is a schematic diagram illustrating the process of the first earphone automatically returning to its original position when it is played from the main unit to the first part;

[0171] Figure 140 This is a schematic diagram illustrating the host's open / closed state detection;

[0172] Figure 141 This is a schematic diagram showing the host detecting the status of the headphones entering and leaving the case;

[0173] Figure 142 This is a schematic diagram illustrating how the earphones detect their own insertion and removal status from the charging case;

[0174] Figure 143 This is a schematic diagram illustrating the host computer's foreign object detection process. Detailed Implementation

[0175] The following embodiments of this application provide a wearable device, which is a novel product form that integrates a host device and headphones. The host device can be, but is not limited to, electronic devices such as smartwatches, electronic blood pressure monitors, smart bracelets, smart helmets, smart clothing, smart glasses, mobile Wi-Fi devices, and smart backpacks. The headphones are wireless headphones, including but not limited to Bluetooth headphones (such as true wireless stereo (TWS) headphones) and infrared headphones. The following description will use an example where the host device has the form of a smartwatch and the headphones are Bluetooth headphones.

[0176] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the wearable device 1 in this embodiment may include a host 2 and an earphone 3, with the earphone 3 housed within the host 2. The design of the host 2 will be described first, followed by the design of the earphone 3, and finally, the overall characteristics and functions of the wearable device 1 will be explained.

[0177] Product form and motion design of the main unit 2

[0178] like Figures 1-4 As shown, the main unit 2 may include a first part 21, a hinge assembly 22, a second part 23, a function key 24, and an open key 25. The first part 21 may be referred to as the cover, and the second part 23 may be referred to as the main body.

[0179] The main unit 2 may also include a wristband that can be attached to opposite sides of the second part 23.

[0180] like Figures 1-3 As shown, the hinge assembly 22 connects the first part 21 and the second part 23. The first part 21 can rotate relative to the second part 23 via the hinge assembly 22, so that the main unit 2 is in a closed state and an open state. When the main unit 2 is closed, the first part 21 and the second part 23 can form a receiving space, and the earphone 3 is housed in the receiving space.

[0181] Figure 1 This indicates that host 2 is in a closed state, at which time the first part 21 and the second part 23 are closed. Figures 2-5 Both indicate that host 2 is in the open state, at which time the first part 21 is open at a certain angle relative to the second part 23. For example, Figure 2 The angle α of the first part 21 can be approximately 15 degrees. Figure 3 The angle b of the first part 21 can be approximately 75 degrees. Figure 5 When the first part 21 is rotated to its extreme position, the angle c of the first part 21 can be approximately 90 degrees. It can be understood that the specific value of the angle c when the first part 21 is in its extreme position can be designed according to product requirements and is not limited to what is described above.

[0182] In addition, in this embodiment, such as Figures 2-4 As shown, when the main unit 2 is in the open state, the earphone 3 can detach from the second part 23 and attach to the first part 21. This design facilitates the user's removal and placement of the earphone 3 (as will be further described below). In other embodiments, when the main unit 2 is open, the earphone 3 can be stored in the second part 23.

[0183] In this embodiment, through the special structural design of the rotating shaft assembly 22, the rotational stroke of the first part 21 can be segmented, and within each segment, the first part 21 has corresponding rotational characteristics. In one segment of the stroke, the first part 21 can provide tactile feedback (the specific principle will be described in detail below).

[0184] For example, during the process of opening the closed main unit 2, the rotational stroke of the first part 21 can be divided into three segments. Among them, the rotational stroke of the first part 21 is divided into three segments. Figure 1 The state shown Figure 2 The state shown represents the first segment of the stroke of the first part 21. Within this first segment, the angle of the first part 21 gradually increases to angle α, and the first part 21 rotates automatically under the torque drive of the rotating shaft assembly 22, requiring no external force. Figure 2 The state shown Figure 3 The state shown represents the second segment of the stroke of the first part 21. During this second segment, the angle of the first part 21 gradually increases from angle a to angle b, during which the shaft assembly 22 no longer provides torque to the first part 21, and the first part 21 needs to rotate under external force. Figure 3 The state shown Figure 5 The state shown represents the third segment of the stroke of the first part 21. During this third segment, the angle of the first part 21 gradually increases from angle b to angle c. The first part 21 rotates automatically under the torque drive of the rotating shaft assembly 22, requiring no external force. When the angle of the first part 21 is angle c, the torque of the rotating shaft assembly 22 can continue to exist. It is easy to understand that the main unit 2 has a limiting structure; under the combined action of this limiting structure and the rotating shaft assembly 22, the first part 21 can maintain a balanced state.

[0185] Conventional flip-cover electronic devices (such as laptops and flip phones) require continuous force from the user to open, resulting in a rather monotonous tactile experience. However, in this embodiment, the rotational stroke of the first part 21 is segmented through the structural design of the hinge assembly 22, so that the first part 21 only requires user force to drive it in the second segment of the stroke, and can rotate automatically without user force in the other segments, thereby providing a novel tactile experience.

[0186] Furthermore, during the third segment of the stroke, the first part 21 is driven by the pivot assembly 22 to move away from the second part 23. When the angle of the first part 21 reaches angle c, the driving force of the pivot assembly 22 still exists, so the user's operation of removing the earphone 3 from the first part 21 is unlikely to pull the first part 21 towards the second part 23. This design makes it easier for the user to remove the earphone 3 and improves the user experience.

[0187] In other embodiments, the structure of the rotating shaft can be designed so that the rotational stroke of the first part 21 does not need to be segmented, but rotates by the user continuously applying force or always automatically.

[0188] like Figures 1-3 As shown, the opening key 25 can be installed in the second part 23 and can be located at both ends of the radial direction of the second part 23, respectively, along with the rotating shaft assembly 22. A portion of the opening key 25 can be exposed in the second part 23 for the user to press. The locking structure in the opening key 25 (described below) can form a detachable connection with the locking structure in the first part 21 (described below). The opening key 25 cooperates with the locking structure in the first part 21 to open and close the main unit 2.

[0189] For example Figure 1 As shown, when the host 2 is in the closed state, the latching structure in the open key 25 forms a detachable connection with the latching structure in the first part 21.

[0190] Combination Figure 1 and Figure 2 When the user wants to open the main unit 2, the user can press the open button 25, causing the open button 25 to move mechanically, and the locking structure in the open button 25 will no longer engage with the locking structure in the first part 21. At this time, the first part 21 can automatically open under the drive of the rotating shaft assembly 22 and complete the first stroke. Conversely, when the user wants to close the main unit 2, the user can press down on the first part 21, causing it to rotate toward the second part 23. When the locking structure in the second part 23 contacts the locking structure in the open button 25, the open button 25 will move mechanically, and the locking structure in the open button 25 will resume engagement with the locking structure in the first part 21.

[0191] The specific principle by which the host 2 is opened and closed through the locking structure in the first part 21 via the open button 25 will be described in detail below.

[0192] In other embodiments, the unlocking button may also be installed in the first part, and the second part has a locking structure. The unlocking button cooperates with the locking structure in the second part to open and close the main unit. The first part may be a cover, and the second part may be the main body. The following description will continue with an example of an unlocking button 25 installed in the second part 23.

[0193] The above provides a brief overview of the product form and motion design of wearable device 1. The following section will describe the specific structure of wearable device 1 in detail, following the order of first describing part 21, part 23, power button 25 and function button 24, and then describing the hinge assembly 22.

[0194] Structure of Host 2

[0195] like Figure 5 and Figure 6 As shown, the first part 21 of the main unit 2 of the wearable device 1 may include a display screen 211, a first main unit circuit board assembly 212, and a first main unit housing 213. The display screen 211 and the first main unit circuit board assembly 212 are both mounted on the first main unit housing 213, and the first main unit circuit board assembly 212 is located between the display screen 211 and the first main unit housing 213.

[0196] Structure of the first main unit casing 213

[0197] like Figure 7 and Figure 8 As shown, the first main unit housing 213 can be approximately disc-shaped. The first main unit housing 213 can be assembled from several components, such as a first frame 213a, a first bracket 213b, a magnet assembly 213r, a locking part 213d (i.e., the locking structure in the first part 21 mentioned above), a sealing bracket 213t, and a sealing ring 213s.

[0198] like Figures 7-9 As shown, the first frame 213a can be a frame structure with a generally circular outer contour. Through holes 213z can be formed on the edge of the first frame 213a; these through holes 213z can be oblong (or racetrack-shaped). The first frame 213a can be made of a conductive material, such as metal. The first frame 213a can serve as an antenna (described below).

[0199] like Figures 7-9As shown, the first support 213b can be approximately disk-shaped. A local area of ​​the first support 213b can form a first receiving groove 213y and a second receiving groove 213x, which are arranged alternately. Figure 9 As shown, viewed from one side of the first support 213b, the local area forming the first receiving groove 213y and the second receiving groove 213x is recessed. Figures 7-8 As shown, viewed from the other side of the first support 213b, the local area forming the first receiving groove 213y and the second receiving groove 213x is convex. Figure 9 and Figure 4 As shown, the first receiving slot 213y can be used to receive the first earphone 31, and the second receiving slot 213x can be used to receive the second earphone 32.

[0200] refer to Figure 9 As shown, a circumferential groove can also be formed around the periphery of the first bracket 213b, the opening of which is located on the same side of the first receiving groove 213y. This groove surrounds the outer periphery of the first receiving groove 213y and the second receiving groove 213x. As will be described below, this groove is used to install the sealing bracket 213t and the sealing ring 213s.

[0201] like Figures 7-9 As shown, the first bracket 213b is fixedly connected to the first frame 213a. The peripheral area of ​​the first frame 213a surrounds the outer periphery of the first bracket 213b, and the through hole 213z of the first frame 213a is also located on the outside of the first bracket 213b.

[0202] like Figure 9 As shown, the locking part 213d can be fixed to the edge of the first bracket 213b and can be positioned opposite to the through hole 213z of the first frame 213a. Combined Figure 9 and Figure 10 As shown, the end of the latching portion 213d facing away from the first bracket 213b may have a frame structure 213w, which may be located on the same side of the first bracket 213b as the opening of the first receiving groove 213y. The frame structure 213w may form a through hole 213v. The side of the frame structure 213w facing away from the first bracket 213b may have a bevel 213u. The frame structure 213w of the latching portion 213d is used to form a detachable snap-fit ​​connection with the latching structure in the opening key 25 (described below), wherein the bevel 213u serves as a guide, allowing the frame structure 213w to smoothly engage with the latching structure in the opening key 25.

[0203] Magnet assembly 213r

[0204] like Figure 8 and Figure 11As shown, the magnet assembly 213r may include a fixed bracket 213r1 and a first host magnet 213r2.

[0205] Indicatively, the first host adsorption magnet 213r2 can be composed of two single magnets spliced ​​together. Each single magnet has a single magnetic field direction. The first host adsorption magnet 213r2 composed of two single magnets can have two magnetic field directions. The first host adsorption magnet 213r2 can form a Heilbeck array.

[0206] Depending on product requirements, in other embodiments, the first host magnet can be a Heilbeck array composed of other numbers of individual magnets. For example, the first host magnet may be a Heilbeck array composed of three individual magnets, and this first host magnet may have three magnetic field directions. Alternatively, the first host magnet may be a Heilbeck array composed of four individual magnets, and this first host magnet may have four magnetic field directions.

[0207] Alternatively, in other embodiments, the first host magnet may be a single magnet with a single magnetic field direction. Or, the first host magnet may be a single magnet, but it may form a Heilbeck array with at least two magnetic field directions (this can be achieved by magnetizing different regions of a physically single magnet in different directions).

[0208] like Figure 11 and Figure 7 As shown, the shape of the first host magnet 213r2 in this embodiment can be adapted to the shape of the outer surface of the groove wall of the first receiving groove 213y (or the second receiving groove 213x) in the first bracket 213b. The first host magnet 213r2 can be fixed to the outer surface of the groove wall of the first receiving groove 213y and the outer surface of the groove wall of the second receiving groove 213x.

[0209] like Figure 11 As shown, there can be, for example, four first host magnets 213r2, and the structures of the four first host magnets 213r2 can be identical. Combined with... Figure 11 and Figure 7 As shown, the four first host magnets 213r2 can be arranged in pairs. The first pair is installed on the outer surface of the wall of the first receiving groove 213y, and the two first host magnets 213r2 in the first pair can be symmetrically installed on both sides of the wall of the first receiving groove 213y (e.g., Figure 7 (Left and right sides in the view). The second group is installed on the outer surface of the groove wall of the second receiving groove 213x, and the two first host adsorption magnets 213r2 of the second group are symmetrically installed on both sides of the groove wall of the second receiving groove 213x (e.g., the left and right sides in the view). Figure 7 (Left and right sides in the perspective).

[0210] In other embodiments, the number of first host magnets 213r2 can be designed according to product needs and is not limited to those described above.

[0211] like Figure 11 As shown, the number of fixing brackets 213r1 can be the same as the number of the first host magnets 213r2; for example, there can be four fixing brackets 213r1. Combined with... Figure 11 and Figure 7 As shown, the fixed bracket 213r1 can be installed on the first bracket 213b, and one fixed bracket 213r1 can correspond to one first host adsorption magnet 213r2, so that each first host adsorption magnet 213r2 is fixed between a fixed bracket 213r1 and the first bracket 213b.

[0212] In this embodiment, the fixing bracket 213r1 ensures reliable fixation of the first host magnet 213r2. In other embodiments, the fixing bracket 213r1 may be omitted depending on product requirements.

[0213] Sealing bracket 213t and sealing ring 213s

[0214] like Figure 12 and Figure 8 As shown, the sealing bracket 213t can be arranged in a circumference, and its shape matches the periphery of the first bracket 213b. The sealing bracket 213 can include a bracket body 213p and a plurality of protrusions 213q protruding from one side of the bracket body 213p. All protrusions 213q can be spaced apart from each other. The preceding protrusion 213q can be close to the outer side of the bracket body 213p, and the following protrusion 213q adjacent to the preceding protrusion 213q can be close to the inner side of the bracket body 213p, and all protrusions 213q can be arranged in this manner. In other embodiments, all protrusions 213q may not need to be arranged in an "inner and outer" manner; for example, all protrusions 213q can be located on the outer or inner side of the bracket body 213p.

[0215] like Figure 8 As shown, the sealing ring 213s can be arranged in a circumference, and its shape matches the shape of the sealing bracket 213t. The sealing ring 213s and the sealing bracket 213t are fixedly connected, for example, they can be integrally molded, such as through an integral injection molding process. The sealing bracket 213t can be made of a harder material with higher structural strength and less deformation, while the sealing ring 213s can be made of a softer material with lower structural strength and easier deformation. The component consisting of the sealing ring 213s and the sealing bracket 213t can be called a sealing element.

[0216] Figure 13This indicates the assembly structure of the first frame 213a, the first bracket 213b, the sealing bracket 213t, and the sealing ring 213s. Figure 14 for Figure 13 A magnified view of a portion of point B in the middle.

[0217] like Figure 14 As shown, a groove 213n can be formed on the periphery of the first bracket 213b. Combined with... Figure 14 and Figure 13 As shown, the groove 213n surrounds the periphery of the first bracket 213b, and the groove 213n can surround the outer periphery of the first receiving groove 213y and the second receiving groove 213x. The sealing bracket 213t is fixed in the groove 213n, and the protrusion 213q can contact the bottom surface of the groove 213n. A gap is formed between the part of the bracket body 213p without the protrusion 213q and the bottom surface of the groove 213n.

[0218] The sealing bracket 213t can be bonded to the groove 213n, for example, using an adhesive dispensing process. The adhesive fills the groove 213n, specifically filling the gap between the portion of the bracket body 213p without protrusions 213q and the bottom surface of the groove 213n. Because the sealing bracket 213t has several spaced protrusions 213q, several gaps are formed between the sealing bracket 213t and the bottom surface of the groove 213n. This ensures sufficient adhesive filling and thus guarantees bonding strength. Furthermore, the existence of these gaps prevents adhesive overflow, thus ensuring a high yield rate for the dispensing process.

[0219] like Figure 14 As shown, the sealing ring 213s is located on the side of the sealing bracket 213t opposite to the protrusion 213q. As will be explained below, the sealing ring 213s is used to seal the gap between the first bracket 213b and the second main unit housing 231 of the main unit 2.

[0220] In this embodiment, the groove 213n of the first frame 213a is relatively narrow, and the sealing ring 213s is relatively thin and soft (i.e., the material of the sealing ring 213s has low hardness). If the sealing ring 213s is inserted into the groove 213n alone, it will be difficult to insert the sealing ring 213s. However, by connecting the softer sealing ring 213s to the harder sealing bracket 213t (the material of the sealing bracket 213t has high hardness), and then inserting the sealing bracket 213t into the groove 213n, the sealing ring 213s can be assembled into the first frame 213a more easily.

[0221] First main circuit board assembly 212

[0222] like Figure 15As shown, the first host circuit board assembly 212 may include a circuit board 212a and devices disposed on the circuit board 212a. The circuit board 212a may be, for example, the main circuit board of the host 2. The devices on the circuit board 212a may include, for example, grounding springs 212b, 212c, 212d, 212e, and a power supply spring 212f. Among them, grounding springs 212b, 212c, 212d, and 212e can all be electrically connected to the ground on the circuit board 212a, and power supply spring 212f can be connected to the power supply point on the circuit board 212a. The devices on the circuit board 212a may also include magnetic field sensors, such as Hall sensors or magnetometers.

[0223] Combination Figure 6 and Figure 7 As shown, the first host circuit board assembly 212 can be mounted on the side of the first bracket 213b opposite to the opening of the first receiving groove 213y, and is partially located between the groove wall of the first receiving groove 213y and the groove wall of the second receiving groove 213x.

[0224] Display screen 211

[0225] like Figure 6 As shown, the display screen 211 may have a circular outer contour, and its edges may have rounded corners. The display screen 211 may be connected to both the first frame 213a and the first bracket 213b of the first host housing 213. The display screen 211 may face the first host circuit board assembly 212. The display screen 211 may be electrically connected to the first host circuit board assembly 212 to realize image display. The display screen 211 may also have touch functionality.

[0226] like Figure 4 and Figure 6 As shown, the second part 23 of the main unit 2 of the wearable device 1 may include a second main unit housing 231, a main unit battery 234, a third main unit housing 232, a second main unit circuit board assembly 235, a wireless charging coil 236, and a fourth main unit housing 233.

[0227] Second main casing 231

[0228] like Figure 16 , Figure 17 and Figure 18 As shown, the second host housing 231 may include a second bracket 231a, a second charging spring 231c, a first charging spring 231e, a foreign object detection spring 231d, a status detection magnet 231x and a status detection magnet 231w, and a second host adsorption magnet 231v.

[0229] like Figure 19As shown, the second support 231a may have a generally circular outline. A third receiving groove 231f and a fourth receiving groove 231g may be formed in a local area of ​​the second support 231a. The third receiving groove 231f and the fourth receiving groove 231g are arranged alternately, and their structures can be basically identical. Viewed from one side of the second support 231a, the local area forming the third receiving groove 231f and the fourth receiving groove 231g is concave. Viewed from the other side of the second support 231a, the local area forming the third receiving groove 231f and the fourth receiving groove 231g is convex.

[0230] Combination Figure 19 and Figure 4 As shown, the third receiving slot 231f is used to receive the first earphone 31, and the fourth receiving slot 231g is used to receive the second earphone 32. When the main unit 2 is closed, the third receiving slot 231f and the first receiving slot 213y form a receiving space for receiving the first earphone 31, and the fourth receiving slot 231g and the second receiving slot 213x form a receiving space for receiving the second earphone 32.

[0231] In this embodiment, the depth of the third receiving groove 231f can be greater than the depth of the first receiving groove 213y, and the depth of the fourth receiving groove 231g can be greater than the depth of the second receiving groove 213x. The groove depth can be defined as the maximum distance from the opening of the receiving groove (a collective term for the first receiving groove 213y, the second receiving groove 213x, the third receiving groove 231f, and the fourth receiving groove 231g) to the bottom surface of the receiving groove along the normal direction of the circuit board in the host 2.

[0232] In this embodiment, when the host 2 is opened, the earphone 3 can be magnetically attached to the first part 21. A portion of the first earphone 31 is located within the first receiving groove 213y, and another portion is located within the first receiving groove 213y. The maximum distance between the portion of the first earphone 31 located within the first receiving groove 213y and the plane containing the opening of the first receiving groove 213y can be defined as the first distance, and the maximum distance between the portion of the first earphone 31 located outside the first receiving groove 213y and the plane containing the opening of the first receiving groove 213y can be defined as the second distance, where the first distance is less than the second distance. That is, when the host 2 is opened, a small portion of the first earphone 31 is located within the first receiving groove 213y, and the majority of the first earphone 31 is exposed outside the first receiving groove 213y. Similarly, for the second earphone 32, when the host 2 is opened, a small portion of the second earphone 32 is located within the second receiving groove 213x, and the majority of the second earphone 32 is located outside the second receiving groove 213x. This design will be further explained below.

[0233] like Figure 19As shown, the third receiving groove 231f can have two through holes 231z in its groove wall. These two through holes 231z can be located, for example, on the side wall of the third receiving groove 231f away from the fourth receiving groove 231g. The two through holes 231z are spaced apart. The two through holes 231z are used to install the second charging spring 231c and the first charging spring 231e (described further below), respectively. The third receiving groove 231f can also have a through hole 231y in its groove wall. This through hole 231y can be located, for example, approximately on the bottom wall of the third receiving groove 231f. The through hole 231y is spaced apart from both through holes 231z. The through hole 231y is used to install the foreign object detection spring 231d (described further below).

[0234] refer to Figure 19 As shown, the wall of the fourth receiving groove 231g can also have the aforementioned through holes 231z and 231y (hereinafter collectively referred to as through holes). The through holes on the wall of the fourth receiving groove 231g can be located on the side of the fourth receiving groove 231g away from the third receiving groove 231f. The through holes on the wall of the fourth receiving groove 231g and the through holes on the wall of the third receiving groove 231f can be distributed substantially symmetrically on both sides of the plane of symmetry of the second support 231a.

[0235] like Figure 19 As shown, a through hole 231b can be formed on the edge of the second bracket 231a. The through hole 231b can be located between the third receiving groove 231f and the fourth receiving groove 231g, and the through hole 231b can be substantially equidistant from the third receiving groove 231f and the fourth receiving groove 231g. (Combined) Figure 19 and Figure 4 As shown, the through hole 231b is used for the latching part 213d in the first part 21 to pass through (to be described further below).

[0236] Charging spring

[0237] like Figure 18 As shown, there can be two of each of the second charging spring 231c and the first charging spring 231e. (Combined) Figures 16-19As shown, a second charging spring 231c and a first charging spring 231e are mounted on the wall of the third receiving groove 231f, and another second charging spring 231c and another first charging spring 231e are mounted on the wall of the fourth receiving groove 231g. Specifically, for the third receiving groove 231f, the second charging spring 231c can be located at a through hole 231z in the third receiving groove 231f, and the contact of the second charging spring 231c can extend into the third receiving groove 231f through this through hole 231z. The first charging spring 231e can be located at another through hole 231z in the third receiving groove 231f, and the contact of the first charging spring 231e can extend into the third receiving groove 231f through this other through hole 231z. For the fourth receiving slot 231g, the second charging spring 231c can be located at a through hole 231z in the fourth receiving slot 231g, and the contact of the second charging spring 231c can extend into the fourth receiving slot 231g through the through hole 231z. The first charging spring 231e can be located at another through hole 231z in the fourth receiving slot 231g, and the contact of the first charging spring 231e can extend into the fourth receiving slot 231g through the other through hole 231z.

[0238] In this embodiment, both second charging contacts 231c and both first charging contacts 231e are electrically connected to the first host circuit board assembly 212 via a circuit (e.g., a flexible circuit board). The second charging contacts 231c and 231e in the third receiving slot 231f are used to elastically contact the two electrodes on the first earphone 31, and the second charging contacts 231c and 231e in the fourth receiving slot 231g are used to elastically contact the two electrodes on the second earphone 32 (described further below). Thus, the first earphone 31 can be charged via the second charging contacts 231c and 231e in the third receiving slot 231f, and the second earphone 32 can be charged via the second charging contacts 231c and 231e in the fourth receiving slot 231g.

[0239] Foreign object detection shrapnel

[0240] like Figure 18 As shown, there can be two foreign object detection shrapnel 231d. Combined with... Figures 16-19 As shown, a foreign object detection spring 231d can be installed on the wall of the third receiving groove 231f. The foreign object detection spring 231d can be located at the through hole 231y of the third receiving groove 231f, and the contact of the foreign object detection spring 231d can pass through the through hole 231y. Another foreign object detection spring 231d can be installed on the wall of the fourth receiving groove 231g. The foreign object detection spring 231d can be located at the through hole 231y of the fourth receiving groove 231g, and the contact of the foreign object detection spring 231d can pass through the through hole 231y.

[0241] In this embodiment, the foreign object detection spring 231d can be electrically connected to the first host circuit board assembly 212 via a circuit (e.g., a flexible circuit board). The foreign object detection spring 231d is used to realize foreign object detection (detecting whether a foreign object has entered the third receiving slot 231f and the fourth receiving slot 231g), and the specific principle will be explained below.

[0242] State detection magnet

[0243] like Figure 18 As shown schematically, the state detection magnet 231x can be a single magnet. The state detection magnet 231x can have a single magnetic field direction, or at least two magnetic field directions (i.e., forming a Halebeck array). The state detection magnet 231w can be a single magnet. The state detection magnet 231x can have a single magnetic field direction, or at least two magnetic field directions (i.e., a Halebeck array).

[0244] In other embodiments, the aforementioned state detection magnet can be a Heilbeck array composed of at least two single magnets.

[0245] like Figure 18 and Figure 17 As shown, the state detection magnet 231x can be fixed to the side of the second bracket 231a opposite to the opening of the third receiving groove 231f. The state detection magnet 231x can be adjacent to the groove wall of the third receiving groove 231f and can also be close to the through hole 231b. The state detection magnet 231w is located on the same side of the second bracket 231a as the state detection magnet 231x, and the state detection magnet 231w can be adjacent to the groove wall of the fourth receiving groove 231g.

[0246] The second host magnet is 231V.

[0247] like Figure 18 As shown schematically, the second host magnet 231v can be a single magnet. The second host magnet 231v can have a single magnetic field direction, or at least two magnetic field directions (i.e., forming a Hellbeck array).

[0248] Depending on the product requirements, in other embodiments, the second host magnet 231v can also be a Heilbeck array composed of at least two single magnets.

[0249] like Figure 18 and Figure 17As shown, in this embodiment, there may be two second host magnets 231v, and the structures of the two second host magnets 231v may be identical. Both second host magnets 231v can be fixed to the side of the second bracket 231a facing away from the opening of the third receiving groove 231f. One of the second host magnets 231v may be located on the side of the groove wall of the third receiving groove 231f facing the fourth receiving groove 231g, and the other second host magnet 231v may be located on the side of the groove wall of the fourth receiving groove 231g facing the third receiving groove 231f.

[0250] In other embodiments, the number and position of the second host magnet 231v can be designed according to product requirements. For example, a second host magnet 231v can be installed on both sides of the wall of the third receiving groove 231f, and a second host magnet 231v can be installed on both sides of the wall of the fourth receiving groove 231g.

[0251] Main unit battery 234

[0252] like Figure 6 and Figure 20 As shown, the main battery 234 can be fixed to the second bracket 231a and located on the side of the second bracket 231a opposite to the opening of the third receiving groove 231f. The main battery 234 can be located between the groove wall of the third receiving groove 231f and the groove wall of the fourth receiving groove 231g. The main battery 234 can be electrically connected to the second main circuit board assembly 235 via wiring (e.g., a flexible circuit board), and the second main circuit board assembly 235 can be electrically connected to the first main circuit board assembly 212 via wiring (e.g., a flexible circuit board). Therefore, the main battery 234 can be electrically connected to the first main circuit board assembly 212.

[0253] Third main unit casing 232

[0254] like Figure 21 As shown, the third main housing 232 can be generally annular in shape. The third main housing 232 may include a peripheral sidewall 232a, an inner support 232b, and an inner support 232g. The peripheral sidewall 232a can be annular. The inner support 232b and the inner support 232g are both connected to the inner side of the peripheral sidewall 232a, and the inner support 232b and the inner support 232g can be spaced apart, for example, they can be located approximately at opposite ends of the radial direction of the peripheral sidewall 232a.

[0255] like Figure 22 As shown, the third main housing 232 may have a pivot mounting space 232f, which may be a groove formed in the inner support 232g and extending through the peripheral sidewall 232a. The pivot mounting space 232f is used to mount the pivot assembly 22. Figure 24As shown, the inner surface of the shaft mounting space 232f may have a limiting groove 232h, which may be opposite to the opening formed on the peripheral sidewall 232a of the shaft mounting space 232f.

[0256] like Figure 22 As shown, the third main housing 232 may also have a key mounting space, which may form a second opening 232c on the inner support 232b. The key mounting space may also extend through the peripheral sidewall 232a and form a first opening 232d on the peripheral sidewall 232a. The key mounting space may be opposite to the pivot mounting space 232f, for example, the two may be located at opposite ends of the same diameter of the third main housing 232.

[0257] like Figure 22 and Figure 23 As shown, a groove 232i can be formed on the inner surface of the key mounting space opposite to the second opening 232c. The groove 232i can be an elongated groove. A guide groove 232j and a groove 232k can be formed on the inner surface of the key mounting space opposite to the first opening 232d. The guide groove 232j can be a circular hole, and there can be two guide grooves 232j. The groove 232k can be racetrack-shaped and can be located between the two guide grooves 232j.

[0258] like Figure 21 and Figure 22 As shown, the third main housing 232 may also have a function key mounting through hole 232e, which may be formed in the peripheral sidewall 232a and located between the pivot mounting space 232f and the first opening 232d. The function key mounting through hole 232e is used to mount the function key 24.

[0259] Open button 25

[0260] like Figure 25 and Figure 26 As shown, the power button 25 may include a keycap 251, an elastic element 252, a key support 253, and a tactile spring 254.

[0261] like Figure 27 As shown, the keycap 251 can be a one-piece frame structure. The keycap 251 may include a pressing part 251a, a raised dot 251b, a guide part 251c, a supporting part 251d, and a latch 251e.

[0262] like Figure 27 As shown, the pressing part 251a can be generally elongated, and its cross-sectional shape is generally trapezoidal (the cross-section can be perpendicular to the length direction of the pressing part 251a). The pressing part 251a has a surface 251h, which is the surface where the upper base of the trapezoidal cross-section of the pressing part 251a is located.

[0263] like Figure 27 As shown, the protrusion 251b can be provided on the other surface of the pressing part 251a and face away from the surface 251h of the pressing part 251a. The surface of the protrusion 251b can be an arc surface, a plane, or a combination of an arc surface and a plane.

[0264] like Figure 27 As shown, the guide portion 251c can be cylindrical, such as a cylinder. The guide portion 251c can protrude from the other surface of the pressing portion 251a, and the guide portion 251c and the protrusion 251b can be located on the same side of the pressing portion 251a. There can be two guide portions 251c, which can be located at opposite ends of the pressing portion 251a. The guide portion 251c serves to guide the movement of the keycap 251.

[0265] like Figure 27 As shown, the support portion 251d is connected to one side of the pressing portion 251a away from the surface 251h, and the support portion 251d is located between the two guide portions 251c. The support portion 251d can be generally C-shaped, and both free ends of the C-shaped structure of the support portion 251d are connected to the pressing portion 251a. The support portion 251d and the pressing portion 251a can together form an open space 251g. The support portion 251d is used to support the button bracket 253.

[0266] like Figure 27 As shown, the latch 251e can be connected to the support portion 251d and is located within the open space 251g. The latch 251e can face the protrusion 251b. The latch 251e may have an assembly guide ramp 251f. The latch 251e is the locking structure in the opening key 25 described above.

[0267] like Figure 25 and Figure 26 As shown, the elastic element 252 can be a spring. Alternatively, the elastic element 252 can be any other component capable of elastic extension and contraction. There can be two elastic elements 252. (Combined) Figure 26 and Figure 27 As shown, one elastic element 252 can be fitted onto one guide portion 251c, and another elastic element 252 can be fitted onto another guide portion 251c.

[0268] like Figure 28As shown, the button bracket 253 may include a bracket body 253a and two hooks 253b respectively connected to both sides of the bracket body 253a. The bracket body 253a may be flat. The hooks 253b may be bent plates. Each hook 253b may include a first plate 253c and a second plate 253d, which may be bent at approximately a 90-degree angle. The two first plates 253c of the two hooks 253b may be bent away from the second plate 253d. For example, in the view shown, the left first plate 253c may be bent to the left relative to the left second plate 253d, and the right first plate 253c may be bent to the right relative to the right second plate 253d.

[0269] In other embodiments, the two loops may also be bent in the same direction.

[0270] Combination Figure 27 and Figure 28 As shown, the key bracket 253 can be inserted into the open space 251g of the keycap 251, and the two lugs 253b of the key bracket 253 can be supported on the support portion 251d of the keycap 251. The key bracket 253 is used to fix the tactile spring 254, and can also be used to limit the keycap 251 when it moves to its extreme position.

[0271] In this embodiment, the tactile spring 254 has elastic deformation properties, meaning it can be compressed under force and rebound when the pressure is removed. For example... Figure 29 As shown, the tactile spring 254 can be, for example, a dome spring, which can be made of polyethylene terephthalate (PET) sheet, dome switch (or button spring), adhesive backing, film, etc. The tactile spring 254 may have an elastic region 254a, which can be convex when not under pressure, concave when under pressure, and return to the convex shape when the pressure is removed.

[0272] Combination Figure 29 and Figure 25 As shown, the tactile spring 254 can be fixed to the button bracket 253, and the elastic area 254a can face the protrusion 251b.

[0273] The detailed structure of the power button 25 has been described above. The assembly of the power button 25 with the third main housing 232 and the engagement of the power button 251 with the locking part 213d on the first bracket 213b will be described below.

[0274] like Figure 30 and Figure 31 As shown, the power button 25 can be installed in the power button mounting space of the third host housing 232. Figure 30 and Figure 31The state of the open button 25 shown corresponds to the closed state of the host 2.

[0275] Among them, such as Figure 31 As shown, the pressing part 251a can be exposed from the first opening 232d of the key mounting space. Combined with... Figure 31 and Figure 23 As shown, a portion of the guide portion 251c may be located within the guide groove 232j, but does not contact the bottom surface of the guide groove 232j. For example... Figure 31 As shown, a portion of the support portion 251d that is spaced apart from the pressing portion 251a can be located within the groove 232k. The latch 251e can be located within the key mounting space and outside the groove 232k. The keycap 251 can move axially along the guide portion 251c, but due to the limiting effect of the first opening 232d on the pressing portion 251a, the keycap 251 is essentially unable to move in other directions.

[0276] Combination Figure 31 and Figure 23 As shown, the elastic element 252 is fitted onto the guide portion 251c, and a portion of the elastic element 252 may be located within the guide groove 232j. One end of the elastic element 252 contacts the pressing portion 251a, and the other end contacts the bottom surface of the guide groove 232j.

[0277] like Figure 31 and Figure 27 As shown, the key bracket 253 can be assembled with the keycap 251 and fixed within the key opening mounting space. The bracket body 253a of the key bracket 253 can be located within the open space 251g of the keycap 251 and inserted into the groove 232i. The bracket body 253a can abut against the side wall of the groove 232i near the first opening 232d. The two lugs 253b of the key bracket 253 can be supported (or overlapped) on both sides of the support portion 251d. Each lug 253b abuts against a portion of the support portion 251d that is spaced opposite to the pressing portion 251a, preventing the keycap 251 from moving further out of the key opening mounting space. This is the limiting effect of the key bracket 253 on the keycap 251 in its extreme position. Each lug 253b abuts against the top surface of the side wall of the groove 232k (the side wall facing the first opening 232d). Therefore, the sidewalls of groove 232i and groove 232k can limit the button bracket 253 from opposite directions, making it virtually impossible for the button bracket 253 to move along the axial direction of guide groove 232j.

[0278] like Figure 31As shown, the tactile spring 254 can be fixed to the bracket body 253a. The tactile spring 254 can be inserted into the groove 232i, or it can be located outside the groove 232i. The tactile spring 254 is located between the protrusion 251b and the latch 251e, with the elastic area 254a of the tactile spring 254 facing the protrusion 251b. The tactile spring 254 and the latch 251e have a certain distance between them.

[0279] refer to Figure 31 As shown, when a user presses the keycap 251 from the pressing part 251a, the keycap 251 will move into the key mounting space. The guide part 251c will move into the guide groove 232j, and the elastic element 252 will be gradually compressed. The supporting part 251d will slide relative to the ear loop 253b into the groove 232k, and the latch 251e will move into the groove 232k. The protrusion 251b will approach the tactile spring 254. When the protrusion 251b compresses the elastic area 254a and causes the elastic area 254a to elastically deform, the user can experience tactile feedback.

[0280] Conversely, when the pressing part 251a is no longer pressed, the elastic element 252 will rebound and push the keycap 251 to move out of the key mounting space. The guide part 251c will move out of the guide groove 232j, and the elastic element 252 will gradually elongate. The supporting part 251d will slide out of the groove 232k relative to the ear loop 253b, and the latch 251e will move out of the groove 232k. The protrusion 251b will move away from the tactile spring 254. When a portion of the supporting part 251d that is spaced apart from the pressing part 251a re-engages with the ear loop 253b, the keycap 251 stops moving.

[0281] Figure 32 This is a cross-sectional view of the assembly of the first main unit housing 213, the second main unit housing 231, the third main unit housing 232, and the power button 25. The first main unit housing 213 is not shown in cross-section to clearly show the assembly structure. Figure 33 for Figure 32 A magnified view of a portion of point B in the middle.

[0282] Combination Figure 33 and Figure 16 As shown, the latching part 213d on the first bracket 213b of the first main housing 213 can pass through the through hole 231b on the second main housing 231 and enter the key mounting space of the third main housing 232. The latching part 213d can also form a snap-fit ​​connection with the latch 251e, which is a detachable connection. Therefore, through the cooperation of the latching part 213d and the latch 251e, the first main housing 213 can be kept closed with the third main housing 232, that is, the first part 21 and the second part 23 of the main housing 2 can be closed.

[0283] like Figure 33 As shown, when the user presses the pressing part 251a, the latch 251e will move and will no longer maintain a latching connection with the locking part 213d. At this time, the first main housing 213 will automatically open under the drive of the rotating shaft assembly 22. When the user wants to close the first part 21 and the second part 23, after the locking part 213d contacts the latch 251e, the locking part 213d can squeeze the latch 251e until the locking part 213d re-establishes a latching connection with the latch 251e, at which point the first part 21 and the second part 23 are locked together.

[0284] In this embodiment, the opening button 25, through the design of a reciprocating latch 251e, enables the main unit 2 to be opened and locked. The tactile spring 254 adds tactile feedback during the opening of the main unit 2, enhancing the user experience.

[0285] In other embodiments, depending on product requirements, the opening and locking of the host can be achieved using an opening key with other structures. For example, a latch can be provided on the first bracket of the first host housing (corresponding to the latch 251e mentioned above), and a locking part can be provided in the opening key (for example, the locking part can be provided on the support part of the keycap, corresponding to the locking part 213d mentioned above). Alternatively, for example, a torsion spring mechanism can be used to provide a rebound force to the movable keycap, and a latch (or locking part) can be designed on the keycap of the opening key. The opening and closing of the host is achieved by the cooperation of the latch (or locking part) with the locking part (or latch) on the first bracket of the first host housing. In other embodiments, the tactile spring can be omitted.

[0286] In addition, combined Figure 33 and Figure 13 As shown, when the first part 21 and the second part 23 are closed, the first bracket 213b and the second main unit housing 231 are closed and fitted together, and the sealing ring 213s on the first bracket 213b abuts against the periphery of the second main unit housing 231. Thus, the sealing ring 213s can seal the gap between the first bracket 213b and the second main unit housing 231, preventing external moisture from entering the interior of the main unit 2 through the gap.

[0287] In other embodiments, it is readily understood that the sealing bracket and sealing ring can also be installed on the periphery of the second main housing 231. The assembly structure of the sealing bracket, sealing ring, and second main housing is similar to that described above and will not be repeated here. When the first part 21 and the second part 23 are closed, the sealing ring on the second main housing 231 abuts against the periphery of the first bracket to seal the gap between the second main housing 231 and the first bracket 213b.

[0288] Alternatively, unlike the sealing design described above, in other embodiments, the sealing bracket 213t may be omitted, and a sealing ring may be provided only on the first bracket 213b or the second main housing 231, which can also seal the gap between the first bracket 213b and the second main housing 231.

[0289] like Figure 6 and Figure 21 As shown, function key 24 can be approximately cylindrical. Function key 24 can be inserted into the function key mounting through-hole 232e of the third main unit housing 232 and is movably connected to the third main unit housing 232. Function key 24 can move within the function key mounting through-hole 232e along the axis of the function key mounting through-hole 232e, and / or, function key 24 can rotate about the axis of the function key mounting through-hole 232e. Function key 24 is used by the user to press and / or rotate to enable the main unit 2 to perform corresponding functions, such as selection, confirmation, switching screen displays, etc.

[0290] like Figure 34 and Figure 6 As shown, the power button 25 and function button 24 can be assembled to the third main unit housing 232, which in turn can be assembled to the second main unit housing 231. The peripheral sidewall 232a of the third main unit housing 232 surrounds the outer periphery of the second main unit housing 231 and the main unit battery 234. Figure 34 and Figure 16 As shown, the second opening 232c of the third main housing 232 can communicate with the through hole 231b of the second bracket 231a. The wall of the second bracket 231a can avoid the pivot mounting space 232f of the third main housing 232 in order to install the pivot assembly 22.

[0291] Fourth main unit casing 233

[0292] like Figure 35 , Figure 36 and Figure 37 As shown, the fourth main housing 233 can be generally disk-shaped. The fourth main housing 233 may include a third bracket 233a and a lens 233b. The third bracket 233a can be generally disk-shaped. The third bracket 233a may have a mounting through-hole 233c. The lens 233b is mounted on the third bracket 233a and covers the mounting through-hole 233c. The lens 233b allows light emitted from the photoplethysmography (PPG) sensor (described below) to pass through, as well as light reflected back from the human body to pass through.

[0293] Second main circuit board assembly 235

[0294] like Figure 6As shown, the second host circuit board assembly 235 may include a circuit board and wiring and devices disposed thereon. The circuit board in the second host circuit board assembly 235 may, for example, be a sub-circuit board of the host 2. Devices such as a PPG sensor may be disposed on this sub-circuit board. Figure 6 As shown, the second host circuit board assembly 235 can be mounted on the fourth host housing 233.

[0295] Wireless charging coil 236

[0296] Wireless charging coil 236 is used to achieve wireless charging. Wireless charging coil 236 can be mounted on the fourth host housing 233. Wireless charging coil 236 can be electrically connected to a circuit board in the second host circuit board assembly 235; for example, the pins of wireless charging coil 236 can be soldered to this circuit board. Figure 6 As shown schematically, the wireless charging coil 236 may be located on the outer periphery of the second host circuit board assembly 235.

[0297] like Figure 5 and Figure 6 As shown, the fourth main unit housing 233 can be assembled and fixed with the third main unit housing 232. The fourth main unit housing 233 and the third main unit housing 232 together surround the second main unit housing 231, the main unit battery 234, the second main unit circuit board assembly 235, and the wireless charging coil 236. The second main unit circuit board assembly 235 and the wireless charging coil 236 can both be located between the main unit battery 234 and the fourth main unit housing 233.

[0298] Shaft assembly 22

[0299] like Figure 38 , Figure 39 and Figure 40 As shown, in the first embodiment of this invention, the rotating shaft assembly 22 may include a bushing 222, a protrusion mating part 227, a follower 229, a gasket 225, an elastic part 228, a first shaft 221, a limiting part 226, a second shaft 223, and a shaft contact part 224.

[0300] like Figure 41 As shown, the bushing 222 can be generally a hollow cuboid structure. The bushing 222 can have a first outer surface 222a and a second outer surface 222f, which are two intersecting outer surfaces of the bushing 222. In the main unit 2, the side containing the first outer surface 222a of the bushing 222 can be fixedly connected to the first frame 213a in the first part 21 and is covered by the first part 21 and not visible (described further below). When the main unit 2 is in the closed state, the second outer surface 222f can be seen as the exterior surface of the main unit 2 (described further below).

[0301] like Figure 41 and Figure 42 As shown, the inner cavity of the bushing 222 has a partition 222n, which divides the inner cavity into a first inner cavity 222i and a second inner cavity 222j. The partition 222n is provided with a through hole 222s, which connects the first inner cavity 222i and the second inner cavity 222j.

[0302] like Figure 42 and Figure 43 As shown, a sliding groove 222q and several mating grooves 222p can be formed on the surface of the partition 222n facing the first inner cavity 222i. The sliding groove 222q and all the mating grooves 222p can be connected to form a ring. This ring is located on the outer periphery of the through hole 222s and can be concentric with the through hole 222s.

[0303] like Figure 42 As shown, the mating groove 222p can be in the shape of a "recess," and its inner surface can be curved. All the mating grooves 222p can be arranged along an arc, and can be divided into two groups, spaced apart, with several grooves 222p in each group connected sequentially. The number of mating grooves 222p in both groups can be the same, for example, three in each group. In each group, adjacent mating grooves 222p share a common sidewall. The edge of this sidewall can have rounded corners. The top surface of this sidewall can also be recessed relative to the surface where the opening of the mating groove 222p is located (i.e., a step difference exists).

[0304] like Figure 42 and Figure 43 As shown, the groove 222q can be a long strip groove, and the extension trajectory of the groove 222q can be an arc. There can be two grooves 222q, both of which are on the same circumference. The positions of the two grooves 222q on the circumference can be symmetrical, and the two central angles corresponding to the two grooves 222q (the angle formed by the lines connecting the two ends of the groove 222q to the center of the circumference) can be vertical angles. The two grooves 222q and the two sets of mating grooves 222p are arranged alternately along the circumference, that is, the two grooves 222q and the two sets of mating grooves 222p are distributed on the circumference in the order of one groove 222q - one set of mating grooves 222p - another groove 222q - another set of mating grooves 222p. One end of each groove 222q is connected to one of the mating grooves 222p in a set of mating grooves 222p, and the other end of the groove 222q is connected to one of the mating grooves 222p in another set of mating grooves 222p. The groove 222q and the mating groove 222p may have a common sidewall; or, they may not have a sidewall and may be connected.

[0305] The design of the number, structure, and position of the slide grooves 222q and the design of the number, structure, and position of the mating grooves 222p described above are merely illustrative and this embodiment is not limited thereto.

[0306] In this embodiment, the slide groove 222q and the mating groove 222p are used to mate with the protrusions on the protrusion mating member 227 (described below). In other embodiments, the partition 222n may not have the slide groove 222q and the mating groove 222p, and the rotating shaft may not have the protrusion mating member 227.

[0307] like Figure 41 and Figure 42 As shown, the end of the first inner cavity 222i away from the partition 222n can pass through the bushing 222 to form an opening 222h. Figure 41 and Figure 43 As shown, the inner surface of the first inner cavity 222i may include an arc surface a and two planes b, with the two planes b connecting opposite sides of the arc surface a. The arc surface a is closer to the first outer surface 222a, while the planes b are farther from the first outer surface 222a. That is, the first inner cavity 222i has an approximate arch shape, and the opening 222h is approximately arched.

[0308] like Figure 41 and Figure 42 As shown, the second inner cavity 222j may include a first region 222c and a second region 222d that are connected. The first region 222c is located between the partition 222n and the second region 222d. An opening 222b is formed in the first outer surface 222a of the first region 222c. The second region 222d may be a circular hole with its axis facing the partition 222n. An opening 222e is formed in the second region 222d on the first outer surface 222a, and the end of the second region 222d away from the partition 222n may pass through the bushing 222.

[0309] like Figure 41 As shown, the first outer surface 222a of the bushing 222 can also have grooves 222k and 222m, which are located on opposite sides of the first region 222c. Groove 222m can also be located above the second region 222d. The side of groove 222k facing groove 222m communicates with the first region 222c, and the side of groove 222m facing groove 222k communicates with the first region 222c.

[0310] like Figure 44 As shown, a limiting protrusion 222r is provided on the side of the bushing 222 opposite to the first outer surface 222a. The structure of the limiting protrusion 222r can be designed as needed, and this embodiment does not limit it. In this embodiment, the limiting protrusion 222r can be located on the side where the first inner cavity 222i is located on the bushing 222. In other embodiments, the position of the limiting protrusion 222r can be flexibly determined as needed, and is not limited to being located on the side of the partition 222n near the first inner cavity 222i. Alternatively, the limiting protrusion 222r may not be provided.

[0311] like Figure 44 As shown, the surface of the bushing 222 forming the opening 222h can also have a mounting groove 222g, which communicates with the first inner cavity 222i. Similarly, another mounting groove 222g can be formed on the surface of the bushing 222 at the end opposite to the opening 222h, which communicates with the second region 222d. The mounting groove 222g is used to mount the shaft contact 24 (which will be described further below). In other embodiments, the position of the mounting groove 222g can be flexibly determined as needed and is not limited to what is described above. Alternatively, the mounting groove 222g may not be provided.

[0312] like Figure 45 As shown, the protrusion fitting 227 can be generally cylindrical in shape. The bottom surface of the protrusion fitting 227 may have a protrusion 227a, which may have an arcuate surface that protrudes relative to the bottom surface. The number of protrusions 227a is at least one, for example... Figure 45 Two protrusions 227a are shown. When there are at least two protrusions 227a, the protrusions 227a can be evenly spaced along the circumference. The protrusions 227a are used to mate with the grooves 222q and mating grooves 222p on the partition plate 222n of the bushing 222 (to be further described below).

[0313] like Figure 45 As shown, the protrusion fitting 227 may also have a through hole 227b, which can penetrate the protrusion fitting 227 along its centerline. In this embodiment, the inner surface of the through hole 227b may include an arc surface 227c, a plane 227d, and a plane 227e. The two sides of the arc surface 227c are connected to the planes 227d and 227e respectively, and the planes 227d and 227e can form an angle. The protrusion fitting 227 can be mounted on the first shaft 221, and the through hole 227b can mate with the first shaft 221. The through hole 227b of the above structure allows the protrusion fitting 227 to move along the first shaft 221, but it cannot rotate relative to the first shaft 221 (to be further explained below).

[0314] In other embodiments, the rotating shaft may not have the protrusion mating part 227.

[0315] like Figure 46 and Figure 47As shown, the follower 229 can be generally block-shaped or sheet-shaped. The follower 229 has a through hole 229g, the axis of which is generally along the thickness direction of the follower 229. One side of the follower 229 in the thickness direction can be called a shaft mating surface, which can form two steps. The shaft mating surface can include a first inclined surface 229a, a plane 229b, and a second inclined surface 229c connected in sequence (these three areas are shaded to highlight them). The normal of the plane 229b can be along the axial direction of the through hole 229g. The first inclined surface 229a forms an obtuse angle with the plane 229b, and the plane 229b forms an obtuse angle with the second inclined surface 229c. The first inclined surface 229a and the second inclined surface 229c have a step difference. The side of the first inclined surface 229a away from the plane 229b can be higher than the plane 229b, and the side of the second inclined surface 229c away from the plane 229b can be lower than the plane 229b.

[0316] like Figure 46 As shown, the shaft mating surface of the follower 229 may include two first inclined surfaces 229a, two planes, and two second inclined surfaces 229c. The shaft mating surface may form two two-stage steps and may extend downwards step by step along the circumference of the shaft mating surface. The two two-stage steps may be arranged at intervals, for example, the two two-stage steps may be symmetrical about the center of the through hole 229g.

[0317] like Figure 48 As shown, the outer surface of the follower 229 (with its normal pointing towards the through hole 229g) can be approximately arched. This outer surface may include an arc surface 229h, an arc surface 229i, a plane 229d, a plane 229e, and a plane 229f. The arc surfaces 229h and 229i can serve as the top of the arch, and they can be approximately symmetrical about the axis of the through hole 229g. The plane 229e can serve as the bottom of the arch. The plane 229f can be located between the arc surfaces 229h and 229e, and one side of the plane 229f can connect to the arc surface 229h. The plane 229d can be located between the arc surfaces 229i and 229e, and one side of the plane 229d can connect to the arc surface 229i.

[0318] The follower 229 can be installed within the first inner cavity 222i of the bushing 222. The outer surface of the follower 229 has the structure described above, which allows the follower 229 to move within the first inner cavity 222i without rotation (described further below). In other embodiments, the outer surface of the follower 229 may have other suitable structures, as long as they meet the design requirement that the follower 229 can move within the first inner cavity 222i without rotation.

[0319] like Figure 49 and Figure 50As shown, the gasket 225 can be generally sheet-shaped. The gasket 225 may include a first portion 225a and a second portion 225b, which can be connected (e.g., integrated). The first portion 225a and the second portion 225b can, for example, form an angle d, which is approximately 90°. The first portion 225a and the second portion 225b may not be in the same plane, and the second portion 225b can form an angle e with the plane containing the first portion 225a. For example, in... Figure 50 From a certain perspective, the second part 225b can be tilted upward relative to the first part 225a, and form an angle e with the plane containing the first part 225a (or in other words, form an angle e with the first part 225a).

[0320] The first portion 225a of the gasket 225 can be fixed in the first inner cavity 222i of the bushing 222, and the second portion 225b of the gasket 225 can abut against the plane 229e of the follower 229 (to be further described below).

[0321] like Figure 51 As shown, the first shaft 221 can be a single-piece structure, which may include a first part 221a, a second part 221b, and a third part 221c connected in sequence. It is understood that... Figure 51 The three dashed boxes in the text distinguish the first part 221a, the second part 221b, and the third part 221c respectively. This is only to visually illustrate the approximate positions of the first part 221a, the second part 221b, and the third part 221c, and is not to strictly define the boundaries between the first part 221a, the second part 221b, and the third part 221c.

[0322] like Figure 51 and Figure 52 As shown, the first part 221a may include an end portion 221d and a main body portion 221g, both of which may be generally cylindrical. The main body portion 221g is connected to the second part 221b, while the end portion 221d is located away from the second part 221b. A groove 221e may be formed between the end portion 221d and the main body portion 221g, and the groove 221e may surround the axis of the end portion 221d. The bottom surface of the groove 221e is lower than the outer peripheral surface of the end portion 221d and also lower than the outer peripheral surface of the main body portion 221g.

[0323] like Figure 51 and Figure 53As shown, a recessed space 221f can be formed at one end of the main body 221g near the end portion 221d. The recessed space 221f can have a plane 221i and a plane 221j. Plane 221i can be substantially parallel to the axis of the end portion 221d, and plane 221j can be substantially perpendicular to the axis of the end portion 221d. Plane 221i can be substantially perpendicular to plane 221j. Plane 221j can connect the outer peripheral surface of the main body 221g and plane 221i. Both sides of plane 221i can connect to the outer peripheral surface of the main body 221g. The recessed space 221f can be formed by cutting the outer peripheral surface of the main body 221g.

[0324] like Figure 53 As shown, there can be two recessed spaces 221f, and the two recessed spaces 221f can have a certain distance between them. In other embodiments, the number of recessed spaces 221f is not limited to that described above, and for example, there can be one or more.

[0325] In this embodiment, the end of the main body 221g near the end portion 221d can mate with the through hole 227b of the protrusion fitting 227, and the surface of this end of the main body 221g can mate with the inner wall of the through hole 227b, so that the protrusion fitting 227 can move along the main body 221g but cannot rotate (to be further explained below). In other embodiments, if the protrusion fitting 227 is not provided, the end of the main body 221g near the end portion 221d may not form a recessed space 221f.

[0326] like Figures 51-53 As shown, the second part 221b may have an outer peripheral surface 221h, which may be approximately cylindrical. In this embodiment, the second part 221b may be inserted into the first inner cavity 222i of the bushing 22, and the outer peripheral surface 221h may rotate with the arc surface a of the first inner cavity 222i.

[0327] like Figure 52 and Figure 53 As shown, the surface of the second part 221b facing the end 221d can form two steps. Figure 53 The surface of the two steps is indicated by shading in the image. These two steps are structurally similar to (or roughly modeled after) the two steps of the follower 229 described above. Figure 52 , Figure 46 and Figure 40 As shown, the second part 221b can be assembled with the follower 229 to form a cam mechanism. The surfaces in the two steps of the second part 221b can move and cooperate with the surfaces in the two steps of the follower 229, so that the follower 229 can achieve the set movement (to be further explained below).

[0328] The structure of Part 321c can be designed as needed, and is not limited to... Figures 51-53As shown. The third part 221c is used to fix the inner support 232g to the third main housing 232 (to be further described below). Figure 40 As shown, the elastic element 228 is a component that can provide a rebound force, such as a spring.

[0329] The structures of bushing 222, protrusion mating part 227, first shaft 221, follower 229 and elastic part 228 have been described above. The assembly structure of the above components will be described below.

[0330] like Figure 39 , Figure 45 , Figure 43 and Figure 46 As shown, the follower 229, the elastic element 228, and the protrusion mating element 227 can all be located within the first inner cavity 222i of the bushing 222. The protrusion mating element 227 is close to the partition 222n of the bushing 222, and its protrusion 227a can face the groove 222q (or the mating groove 222p) of the partition 222n. The follower 229 is away from the partition 222n, and its two-stage stepped structure faces away from the partition 222n. The arc surfaces 229h and 229i of the follower 229 can both mate with the arc surface a of the first inner cavity 222i, and the planes 229e and 229f of the follower 229 can both mate with the plane b of the first inner cavity 222i. Therefore, the follower 229 can move within the first inner cavity 222i, but cannot rotate relative to it.

[0331] It is easy to understand that the above-described mating structure between the follower 229 and the first inner cavity 222i is merely an example. In other embodiments, other suitable mating structures can be designed as needed so that the follower 229 can only move within the first inner cavity 222i, but cannot rotate relative to the first inner cavity 222i (it will be explained below that the follower 229 can rotate with the bushing 222).

[0332] like Figure 39 As shown, the elastic element 228 is located between the driven element 229 and the protrusion mating element 227. One end of the elastic element 228 can abut against the driven element 229, and the other end can abut against the protrusion mating element 227.

[0333] like Figure 51 , Figure 39 , Figure 41 and Figure 42As shown, the main body 221g of the first portion 221a of the first shaft 221 and the second portion 221b can both be located in the first inner cavity 222i of the bushing 222. The end portion 221d of the first portion 221a can be located in the first region 222c of the second inner cavity 222j of the bushing 222, and part or all of the slot 221e of the first portion 221a can be located in the first region 222c.

[0334] like Figure 51 , Figure 46 , Figure 45 and Figure 42 As shown, the first part 221a can pass through the through hole 229g of the follower 229, the through hole 227c of the elastic member 228, the through hole 227c of the protrusion mating member 227, and the through hole of the partition 222n. The two steps of the second part 221b can face the two steps of the follower 229, and the two steps of the second part 221b can mate with the two steps of the follower 229 so that the second part 221b and the follower 229 form a cam mechanism.

[0335] like Figure 53 and Figure 45 As shown, the plane 221i of one recessed space 221f of the main body 221g can be aligned with and fitted to the plane 227d of the through hole 227b of the protrusion fitting 227. The plane 221i of the other recessed space 221f of the main body 221g can be aligned with and fitted to the plane 227e of the through hole 227b of the protrusion fitting 227. The outer peripheral surface of the main body 221g can be aligned with and fitted to the arcuate surface 227c of the through hole 227b of the protrusion fitting 227. Thus, the protrusion fitting 227 can move along the main body 221g in the first inner cavity 222i, but cannot rotate around the main body 221g.

[0336] It is easy to understand that the above-described mating structure between the main body 221g and the protrusion mating member 227 is merely an example. In other embodiments, other suitable mating structures can be designed as needed so that the protrusion mating member 227 can only move along the main body 221g but cannot rotate around the main body 221g.

[0337] Combination Figure 51 and Figure 39 As shown, the third part 221c of the first shaft 221 can be located outside the bushing 222.

[0338] Figure 54 The assembly structure of the first shaft 221, the driven member 229, the elastic member 228 and the protrusion mating member 227 can be represented more intuitively.

[0339] like Figure 39 and Figure 50As shown, the gasket 225 can be fixed in the first inner cavity 222i of the bushing 222. The first portion 225a of the gasket 225 can be located between the third portion 221c of the first shaft 221 and the bushing 222. The second portion 225b of the gasket 225 can be located between the driven member 229 and the bushing 222. During the entire movement of the driven member 229, the second portion 225b can always abut against the driven member 229. Since the second portion 225b is raised relative to the first portion 225a, the second portion 225b can press the driven member 229 against the inner surface of the first inner cavity 222i of the bushing 222, so that the driven member 229 and the inner surface of the first inner cavity 222i are tightly fitted, thus avoiding the driven member 229 from shaking during movement due to manufacturing errors. In other embodiments, the gasket 225 may be omitted depending on actual needs.

[0340] like Figure 55 As shown, the limiting member 226 can be basically plate-shaped, and its structure can be designed as needed. For example, the outer contour of the limiting member 226 can be adapted to the shape of the first region 222c of the second inner cavity 222i of the bushing 22. An opening 226a can be formed on the limiting member 226.

[0341] Combination Figure 55 , Figure 39 and Figure 52 As shown, the limiting member 226 can be located in the first region 222c of the second inner cavity 222i of the bushing 22 and contact the partition 222n of the bushing 22. The edge of the opening 226a of the limiting member 226 can be engaged in the groove 221e of the first part 221a of the first shaft 221. Thus, the limiting member 226 can limit the first shaft 221, prevent the first shaft 221 from disengaging from the bushing 22, and ensure that the relative position of the first shaft 221 and the bushing 22 remains unchanged, thereby ensuring the reliable assembly of the driven member 229, the elastic member 228, and the protrusion mating member 227 with the bushing 22.

[0342] like Figure 56 , Figure 57 and Figure 58 As shown, the second shaft 223 can be a single-piece structure, which may include a first part 223a, a second part 223b, and a third part 223c connected in sequence. It is understood that... Figure 56 The three dashed boxes in the text distinguish the first part 223a, the second part 223b, and the third part 223c respectively. This is only to visually illustrate the approximate positions of the first part 223a, the second part 223b, and the third part 223c, and is not to strictly define the boundaries between the first part 223a, the second part 223b, and the third part 223c.

[0343] like Figures 56-58As shown, both the first part 223a and the second part 223b can be roughly cylindrical. The structure of the third part 223c can be designed according to requirements. Figures 56-58 The illustration is merely schematic. A channel 223d can be formed on the second axis 223, extending substantially along the axial direction of the first portion 223a. The channel 223d can penetrate both radially opposite ends of the first portion 223a, and radially penetrate one end of the second portion 223b and the third portion 223c. Thus, the first portion 223a can be divided into two completely separate parts by the channel 223d, and both the second portion 223b and the third portion 223c can be divided into two connected parts by the channel 223d.

[0344] like Figure 57 and Figure 58 As shown, the end of the first part 223a away from the second part 223b has a groove 223e, which can be formed on the inner surface of the channel 223d. There can be two grooves 223e, with each part of the first part 223a having one groove 223e and the openings of the two grooves 223e facing each other.

[0345] In this embodiment, a flexible circuit board can be mounted on the second axis 223. This will be described in detail below.

[0346] Figure 59 , Figure 60 and Figure 61 The diagram shows the structure of the flexible circuit board 26 after bending and winding (the flexible circuit board 26 will be bent and wound after being installed on the second axis 223). In fact, the flexible circuit board 26 is in a flat state before being installed on the second axis 223. In the flat state, the flexible circuit board 26 can be roughly a long strip-shaped structure.

[0347] like Figures 59-61 As shown, the flexible circuit board 26 may include an electrical connection terminal 261 and an electrical connection terminal 263. When the flexible circuit board 26 is flattened, the electrical connection terminal 261 and the electrical connection terminal 263 are the two ends of the flexible circuit board 26 in the extension direction. Both the electrical connection terminal 261 and the electrical connection terminal 263 are used to transmit electrical signals, and both may include connectors.

[0348] Schematic, the electrical connection terminal 261 can be connected to the first host circuit board assembly 212. For example, the connector of the electrical connection terminal 261 can be connected to the connector on the circuit board 212a of the first host circuit board assembly 212 to electrically connect the flexible circuit board 26 to the first host circuit board assembly 212.

[0349] Schematic, electrical connection terminal 263 can be electrically connected to the second main circuit board assembly 235, the flexible circuit board connecting function key 24 and the motor (schematically, function key 24 and the motor can share the same flexible circuit board), etc. The flexible circuit board connecting function key 24 and the motor can, for example, be fixed to the side of the second bracket 231a facing away from the opening of the third receiving groove 231f. A magnetic field sensor (e.g., a Hall sensor or magnetometer) can also be arranged on this flexible circuit board. For example, there can be two magnetic field sensors, which can be located near the groove walls of the third receiving groove 231f and the fourth receiving groove 231g, respectively.

[0350] like Figures 59-61 As shown, the flexible circuit board 26 may also include a connecting portion 264 and a mounting portion 262. The connecting portion 264 connects the mounting portion 262 to the electrical connection terminal 261, and the mounting portion 262 is also connected to the electrical connection terminal 263.

[0351] like Figures 59-61 As shown, the connecting portion 264 has a grounding portion 264a and a limiting portion 264b. The grounding portion 264a may be located closer to the electrical connection terminal 261, and the limiting portion 264b may be located farther from the electrical connection terminal 261. The limiting portion 264b may be, for example, lug-shaped. There may be two limiting portions 264b, located on opposite edges of the connecting portion 264.

[0352] like Figures 59-61 As shown, the mounting portion 262 is designed to mate with the second shaft 223 and can be bent and coiled. For example, in Figure 59 From this perspective, a portion of the mounting portion 262 can be folded in half to form a stack, therefore this portion can be referred to as the stacked portion. Another portion of the mounting portion 262 can be connected to this stacked portion and wound into a loop, therefore this portion can be referred to as the wound portion. The wound portion can be located at one end of the stacked portion. It is understood that... Figure 59 The mounting part 262 is marked with a dashed box. This is only to visually illustrate the approximate location of the mounting part 262, and is not to strictly define the boundary of the mounting part 262.

[0353] In this embodiment, the number of wirings in the flexible circuit board 26 needs to meet the design requirements, and the width of the flexible circuit board 26 will affect the number of wirings in the flexible circuit board 26. Therefore, the width of the flexible circuit board 26 (e.g., the minimum width) needs to meet the design requirements. Figure 59 and Figure 62The diagram illustrates the width W1 of the winding portion and the folding width W2 of the stacked portion of the mounting portion 262 of the flexible circuit board 26 (the unfolded width of the stacked portion is approximately 2*W2). The width W1 of the winding portion and the folding width W2 of the stacked portion can be designed as needed.

[0354] like Figures 59-61 As shown, the flexible circuit board 26 may also include a separator bracket 266. The structure of the separator bracket 266 can be designed as needed, for example, it can be generally flat. The number of separator brackets 266 can be determined as needed, and can be a single bracket or at least two brackets. The separator bracket 266 is sandwiched between the folded layers of the stacked portion, and each layer can be connected to the separator bracket 266 (e.g., bonded).

[0355] In this embodiment, the overall unfolded width of the stacked portion is relatively small, and it is difficult to maintain the folded shape after folding (the folded layers tend to curl up). However, due to the presence of the separator bracket 266, the stacked portion can maintain its folded shape. Additionally, the separator bracket 266 can limit the bending radius of the stacked portion, preventing excessive bending and damage. In other embodiments, depending on product requirements, the separator bracket 266 may be omitted. Figure 59 and Figure 61 As shown, the flexible circuit board 26 may further include a protective layer 265, which may be attached to the surface of the stacked portion and located at the end of the stacked portion away from the winding portion. The material of the protective layer 265 may be, for example, Mylar. In this embodiment, the position and material of the protective layer 265 may also be designed according to product needs and are not limited to those described above.

[0356] In this embodiment, the laminated portion can be fixed to the third host housing 232. The protective layer 265 can separate the laminated portion from the third host housing 232, preventing the flexible circuit board 26 from being damaged due to friction between the laminated portion and the third host housing 232 (described further below). Additionally, the protective layer 265 can also provide structural reinforcement to the laminated portion. In other embodiments, the protective layer 265 may be omitted depending on product requirements.

[0357] Figure 62 and Figure 63 This illustrates the assembly structure of the flexible circuit board 26 and the second shaft 223. When assembling the flexible circuit board 26 and the second shaft 223, the stacked portion of the mounting portion 262 of the flattened flexible circuit board 26 can be folded in half first, while the wound portion of the mounting portion 262 remains flat. Combined with... Figure 62 , Figure 63 and Figure 58Then, the entire mounting portion 262 is inserted into the channel 223d of the second shaft 223 from the third portion 223c end of the second shaft 223, positioning the wound portion of the mounting portion 262 to the first portion 223a of the second shaft 223. At this time, the wound portion can be bent to wrap around the outer periphery of the first portion 223a, and the number of turns can be determined according to actual needs. After winding, the wound portion is at a certain distance from the end of the first portion 223a away from the second portion 223b (i.e., the wound portion does not cover the end of the first portion 223a), which helps to avoid the wound portion being scratched and affecting its lifespan (to be further explained below). The electrical connection ends 261 and 263 of the flexible circuit board 26 are both located outside the second shaft 223. The electrical connection ends 261 and 263 can be bent to adapt to the internal space of the host 2. The protective layer 265 and the connecting portion 264 of the flexible circuit board 26 can also be exposed outside the second shaft 223.

[0358] In this embodiment, the inner ring of the wound portion of the flexible circuit board 26 directly contacts the first portion 223a of the second shaft 223. The junction between the wound portion and the stacked portion can be fixed to the first portion 223a, for example, by bonding. Other areas of the wound portion can be left unfixed and remain in a naturally wound state. These areas can be relaxed to increase the diameter of the portion, or tightened to decrease the diameter of the portion.

[0359] In this embodiment, since the winding portion of the flexible circuit board 26 is wound around the first portion 223a of the second shaft 223, the width dimension W1 of the winding portion can be guaranteed by the axial dimension of the first portion 223a. Because the stacked portion of the flexible circuit board 26 is housed in a folded state within the channel 223d of the second shaft 223, the second shaft 223 requires only a small space to accommodate the stacked portion with an unfolded width of 2*W2, which is beneficial for miniaturizing the second shaft 223 and consequently for miniaturizing the host machine 2.

[0360] In summary, by designing the second shaft 223 with the above structure and installing the flexible circuit board 26 onto the second shaft 223 by bending and winding, the electrical connection of the host 2 can be realized, the width of the flexible circuit board 26 can be guaranteed to meet the design requirements, and the miniaturization of the host 2 can be achieved.

[0361] In this embodiment, the second shaft 223 on which the flexible circuit board 26 is mounted can be installed into the second inner cavity 222j of the bushing 222.

[0362] Among them, combined Figure 57 and Figure 67As shown, the first portion 223a of the second shaft 223 is located in the first region 222c of the bushing 222. The second portion 223b of the second shaft 223 may be located in the second region 222d of the second inner cavity 222j. The outer peripheral surface of the second portion 223b may form a rotational fit with the inner surface of the second region 222d, that is, the outer peripheral surface of the second portion 223b may contact or not contact the inner surface of the second region 222d (with a small gap), and the inner surface of the second region 222d may rotate relative to the outer peripheral surface of the second portion 223b. The third portion 223c of the second shaft 223 is located outside the bushing 222.

[0363] Among them, such as Figure 59 , Figure 64 and Figure 67 As shown, the wound portion of the flexible circuit board 26 is located in the first region 222c. A portion of the stacked portion of the flexible circuit board 26 is located in the first region 222c and the second region 222d, while another portion of the stacked portion is located outside the bushing 222. The electrical connection terminals 261 and 263 of the flexible circuit board 26 are both located outside the bushing 222. The connection portion 264 of the flexible circuit board 26 can pass through the opening in the first region 222c, and the grounding portion 264a and the limiting portion 264b of the connection portion 264 are both located outside the bushing 222.

[0364] Combination Figure 64 As shown, in this embodiment, the electrical connection terminal 261 of the flexible circuit board 26 can be fixed to the first host circuit board assembly 212, and the electrical connection terminal 261 can move with the first part 21 of the host 2. Therefore, the connection part 264 connected to the electrical connection terminal 261 will also move with the electrical connection terminal 261. In order to ensure that the connection part 264 can move according to the design requirements, to ensure that the movement of the connection part 264 is controllable, and to avoid fatigue damage to the connection part 264, the connection part 264 can be clamped by a clamping member to limit the connection part 264. This will be explained below.

[0365] like Figure 65 As shown, the clamping member 27 can be roughly sheet-shaped, with a slit 27a formed thereon. The slit 27a can be basically straight, with one end of the slit 27a penetrating the clamping member 27 and the other end not penetrating it. The clamping member 27 can be made of a material with good insulation and moisture resistance, such as Mylar sheet.

[0366] like Figure 65 and Figure 66As shown, the connecting portion 264 can be inserted into the slot 27a of the clamping member 27, and the limiting portion 264b of the connecting portion 264 can be held at the edge of the slot 27a. The clamping member 27 can be fixed to the grooves 222k and 222m of the bushing 222, and the clamping member 27 covers at least a portion of the first region 222c. Thus, the clamping member 27 can hold and limit the connecting portion 264. When the connecting portion 264 moves, due to the presence of the clamping member 27, the movement stroke of the connecting portion 264 will meet the design requirements, and fatigue damage is less likely. Furthermore, the limiting portion 264b facilitates accurate positioning of the clamping member 27 and the flexible circuit board 26 during production line assembly, ensuring assembly yield. In other embodiments, the design of clamping the connecting portion 264 by the clamping member 27 can be omitted.

[0367] The structure and assembly of the second shaft 223, flexible circuit board 26, bushing 222 and clamping member 27 have been described above. The overall assembly structure of the rotating shaft assembly 22 and the assembly relationship between the flexible circuit board 26, the second shaft 223 and the first shaft 221 will be described below.

[0368] Figure 67 This diagram shows a cross-sectional view of the assembly structure of the pivot assembly 22, the flexible circuit board 26, and the clamping member 27. The flexible circuit board 26 is not shown in cross-section for clarity. Figure 67 As shown, the assembly relationships between the first shaft 221, the follower 229, the elastic member 228, the protrusion mating member 227, and the bushing 222, as well as the assembly relationships between the second shaft 223, the flexible circuit board 26, the clamping member 27, and the bushing 222, have all been described above and will not be repeated here. As explained above, the end of the first portion 223a of the second shaft 223 is not covered by the winding portion of the flexible circuit board 26, which facilitates the insertion of the end 221d of the first shaft 221 into the groove 223e of the first portion 223a of the second shaft 223. The end 221d and the winding portion can have a certain gap in the axial direction of the first shaft 221 to avoid interference between the end 221d and the winding portion.

[0369] In addition, such as Figure 44 and Figure 38 as well as Figure 40As shown, a shaft contact 224 can be fixed in the mounting groove 222g of the second portion 221b of the bushing 222 near the first shaft 221, and the shaft contact 224 contacts the second portion 221b. Similarly, another shaft contact 224 can be fixed in the groove of the second portion 223b of the bushing 222 near the second shaft 223, and this shaft contact 224 contacts the second portion 223b (due to viewing angle, the groove assembled in the bushing 222 near the second portion 223b, and the shaft contact 224 within the groove, are not shown). In this embodiment, the shaft contact 224 can be a conductor, such as a metal spring.

[0370] The assembly structure of the pivot assembly 22, the flexible circuit board 26, the first part 21 of the main unit 2, and the second part 23 will be described step by step below.

[0371] like Figure 68 As shown, the third portion 221c of the first shaft 221 and the third portion 223c of the second shaft 223 can both be fixed to the inner support 232g of the third main housing 232. The bushing 222 can be located in the shaft mounting space 232f of the third main housing 232, and the bushing 222 can rotate within the shaft mounting space 232f. The second outer surface 222f of the bushing 222 can face the outer side of the peripheral sidewall 232a of the third main housing 232. The electrical connection terminal 261 of the flexible circuit board 26 can be located on the inner side of the peripheral sidewall 232a.

[0372] Combination Figure 67 and Figure 68 As shown, the electrical connection terminal 263 of the flexible circuit board 26 can be located inside the peripheral sidewall 232a and fixed to the inner support 232g. For example, the electrical connection terminal 263 can have adhesive, and the electrical connection terminal 263 can be bonded to the inner support 232g. Figure 67 , Figure 24 and Figure 68 As shown, the protective layer 265 of the flexible circuit board 26 can be located inside the peripheral sidewall 232a and between the peripheral sidewall 232a and the stacked portion of the flexible circuit board 26, to prevent the stacked portion from directly contacting the peripheral sidewall 232a and causing friction, and to avoid damage to the flexible circuit board 26 due to friction.

[0373] like Figure 69 As shown, the second bracket 231a of the second main housing 231 can be assembled and fixed with the third main housing 232, and the second main housing 231 can be located inside the peripheral sidewall 232a. Figure 69From this perspective, the openings of the third receiving groove 231f and the fourth receiving groove 231g on the second bracket 231a face upwards. The second bracket 231a covers the third portion 221c of the first shaft 221 and the third portion 223c of the second shaft 223. The through hole 231b of the second bracket 231a and the bushing 222 can be located approximately at opposite ends of the same diameter of the peripheral sidewall 232a. Figure 69 and Figure 68 As shown, the through hole 231b can communicate with the second opening 232c of the third main housing 232.

[0374] Combination Figure 70 and Figure 69 As shown, the first main unit housing 213 can cover the second main unit housing 231 and the third main unit housing 232. In Figure 70 From the perspective of [the source], the openings of the first receiving groove 213y and the second receiving groove 213x of the first bracket 213b of the first main housing 213 can face downwards. In this embodiment, the opening of the first receiving groove 213y can face the opening of the third receiving groove 231f, and the openings of the first receiving groove 213y and the third receiving groove 231f can be aligned. The opening of the second receiving groove 213x can face the opening of the fourth receiving groove 231g, and the openings of the second receiving groove 213x and the fourth receiving groove 231g can be aligned.

[0375] Combination Figure 70 and Figure 69 As shown, the first frame 213a in the first main housing 213 can be fixedly connected to one side of the bushing 222 having the first outer surface 222a. The first frame 213a can cover a portion of the first outer surface 222a and a portion of the clamping member 27. Another portion of the first outer surface 222a and another portion of the clamping member 27 can be exposed through the through hole 213z of the first frame 213a. The electrical connection end 261 and the connection portion 264 of the flexible circuit board 26 can pass through the through hole 213z of the first frame 213a. The electrical connection end 261 can be connected to the circuit board of the first main circuit board assembly 212 to make the flexible circuit board 26 electrically connected to the first main circuit board assembly 212. The grounding portion 264a of the connection portion 264 can pass through the through hole 213z and be connected to the first frame 213a through a conductor, such as conductive foam or conductive adhesive. This allows the flexible circuit board 26 to be grounded, thereby avoiding interference with the antenna radiation performance of the main unit 2 (to be further explained below). The limiting part 264b of the connecting part 264 is located inside the through hole 213z.

[0376] like Figure 71 and Figure 69As shown, the through-hole 213z of the first frame 213a can be filled with a sealing material (shown in shaded area). The sealing material can fill the through-hole 213z and cover the surface of the first outer surface 222a and the clamping member 27, and the sealing material surrounds the connection portion 264 of the flexible circuit board 26. The sealing material can be, for example, sealant. The sealing material has a sealing function, preventing moisture from entering the electrical connection terminal 261 and the first host circuit board assembly 212 through the through-hole 213z of the first frame 213a. This moisture may originate from the outside, and external moisture may enter the through-hole through the assembly gap between the bushing 222 and the peripheral sidewall 232a. The moisture may also originate from inside the host 2, and internal moisture may enter the through-hole through the assembly gap between the bushing 222 and the second bracket 231a.

[0377] In other embodiments, the structural design can be adjusted (e.g., adjusting the position and / or size of the through hole in the first frame 213a) so that only a portion of the clamping member 27 is exposed through the through hole 213z in the first frame 213a, while the first outer surface 222a of the bushing 222 is completely covered by the first frame 213a. Correspondingly, the sealing material within the through hole 213z only covers the surface of the clamping member 27. Alternatively, in other embodiments, depending on actual needs, the first frame 213a may not have the through hole 213z, and sealing may be achieved without filling with sealing material.

[0378] like Figure 72 As shown, the display screen 211 is mounted on the first host housing 213. Combined with... Figure 72 , Figure 70 and Figure 6 As shown, the display screen 211 can cover the first bracket 213b of the first host housing 213, the first host circuit board assembly 212, the electrical connection terminal 261 and connection portion 264 of the flexible circuit board 26, and a portion of the first frame 213a of the first host housing 213. The periphery of the first frame 213a can surround the outer periphery of the display screen 211. Additionally, Figure 72 The diagram illustrates the closed state of the main unit 2, and the second outer surface 222f of the bushing 222 can be seen as the exterior surface of the main unit 2.

[0379] In summary, in the host 2, the bushing 222 of the rotating shaft assembly 22 is fixedly connected to the first part 21, and the first shaft 221 and the second shaft 223 of the rotating shaft assembly 22 are both fixedly connected to the second part 23. The first part 21 can rotate together with the bushing 222 around the first shaft 221 and the second shaft 223.

[0380] The following will explain the mechanical movements generated in host 2 during the opening and closing process.

[0381] Figure 73 This is a side view of the host unit 2 in its closed state. Figure 74 for Figure 73 A top view of the pivot assembly 22 of the host 2. Figure 73 and Figure 74 To show the internal state of the rotating shaft assembly 22, the bushing 222 is cut open for display. It should be noted that... Figure 73 The cross section of the central bushing 222 and Figure 74 The cross-sections of the central bushing 222 are perpendicular to each other. Figure 75 for Figure 74 A magnified view of a portion of point B in the middle.

[0382] As described above, when the host 2 is in the closed state, the latch 213d in the first part 21 is latched to the latch 251e of the open key 25, so that the first part 21 is locked by the second part 23.

[0383] like Figure 73 and Figure 75 As shown, when the main unit 2 is in the closed state, one end of the elastic element 228 presses against the driven element 229, keeping the driven element 229 in contact with the second part 221b. The top of the first inclined surface 229a of the driven element 229 (i.e., the end of the first inclined surface 229a away from the plane 229b) can contact the top of the inclined surface 221k of the second part 221b of the first shaft 221 (i.e., the end of the inclined surface 221k close to the plane 221m), and there is a gap between the plane 229b of the driven element 229 and the plane 221m of the second part 221b. The force exerted by the inclined surface 221k on the first inclined surface 229a can cause the driven element 229 to have a tendency to rotate in the opening direction, and the first part 21 of the main unit 2 can rotate in this opening direction to open relative to the second part 23.

[0384] like Figure 75 As shown, due to the engagement between the follower 229 and the bushing 222, when the follower 229 tends to rotate clockwise, the bushing 222 also tends to rotate in the opening direction. The bushing 222 is fixedly connected to the first part 21, therefore the first part 21 also tends to rotate in the opening direction. However, since the first part 21 is locked by the second part 23, the first part 21 cannot actually rotate in the opening direction.

[0385] like Figure 75 As shown, the other end of the elastic member 228 presses against the protrusion fitting member 227, so that the protrusion fitting member 227 abuts against the partition plate 222n.

[0386] Figure 76 for Figure 75 AA cross-sectional structural diagram Figure 76This diagram shows the cross-sectional view of the mating structure between the convex mating part 227 and the partition 222n when the host 2 is in the closed state, with the convex point 227a on the convex mating part 227 indicated by dashed lines. For example... Figure 76 As shown, the protrusion 227a is located in the groove 222q on the partition 222n, and the protrusion 227a and the mating groove 222p have a certain distance between them.

[0387] When the user presses the keycap 251 of the power button 25, the latch 251e of the power button 25 and the locking part 213d of the first part 21 will no longer form a latching connection, and the first part 21 will no longer be locked by the second part 23. At this time, the first part 21 will begin the first stage of rotation.

[0388] like Figure 77 As shown ( Figure 77 To clearly illustrate the engagement between the driven member 229 and the second part 221b, the bushing 222 is not shown (the same applies below). Under the combined action of the elastic member 228 and the inclined plane 221k, the driven member 229 will undergo a compound motion. The driven member 229 will rotate in the opening direction while moving towards the second part 221b until the root of the first inclined plane 229a (i.e., the end where the first inclined plane 229a connects to the plane 229b) contacts the top of the inclined plane 221k, and the plane 229b contacts the plane 221m (the influence of inertia on the position of the driven member 229 can be ignored through structural design). Figure 73 As shown, when the follower 229 moves, the bushing 222 and the first part 21 will also rotate around the second part 221b in the opening direction.

[0389] like Figure 73 and Figure 2 As shown, when the follower 229, bushing 222, and first part 21 stop rotating, the first part 21 will complete the first segment of its rotational stroke. The first part 21 will open relative to the second part 23 by an angle α, which can be, for example, about 15°. It is easy to understand that during the first segment of the rotational stroke, the first part 21 is driven to rotate by the bushing 222, so the first part 21 rotates automatically without the user applying external force.

[0390] Combination Figure 76 and Figure 78 As shown, during the first segment of the rotational stroke, due to the relative rotation between the bushing 222 and the protrusion mating part 227, the protrusion 227a of the protrusion mating part 227 will slide within the slide groove 222q and gradually approach the mating groove 222p. By the end of the first segment of the rotational stroke, the protrusion 227a will just reach the junction of the slide groove 222q and the mating groove 222p (e.g., ...). Figure 78(As shown). During the first segment of the rotational stroke, the protrusion 227a slides smoothly within the groove 222q. There is no displacement (or bumping) between the protrusion mating part 227 and the bushing 222 along the rotation axis of the bushing 222, and the protrusion mating part 227 does not impact the bushing 222. Therefore, when the user touches the first part 21, the user experiences no tactile feedback.

[0391] Alternatively, in other embodiments, by the end of the first rotational stroke, the protrusion 227a can enter the mating groove 222p. When the protrusion 227a enters the first mating groove 222p from the slide groove 222q, a displacement occurs between the protrusion mating member 227 and the bushing 222 along the rotation axis of the bushing 222, and the protrusion mating member 227 impacts the bushing 222. Therefore, if a user touches the first part 21, the user can experience tactile feedback.

[0392] like Figure 77 As shown, when the first part 21 opens at an angle α relative to the second part 23, plane 229b contacts plane 221m. The resultant force exerted by the elastic element 228 and the first shaft 221 on the driven member 229 along the axial direction of the main body 221g is zero. Therefore, the elastic element 228 and the first shaft 221 alone cannot continue to drive the driven member 229 to rotate, meaning the first part 21 cannot continue to rotate automatically. At this time, the user can rotate the first part 21 in the opening direction. The first part 21 can drive the bushing 222 to rotate in the opening direction, and the bushing 222 can in turn drive the driven member 229 to rotate in the opening direction. It is easy to understand that during the rotation of the driven member 229, plane 229b and plane 221m slide in contact, so the driven member 229 only rotates and has no displacement in the axial direction of the main body 221g.

[0393] like Figure 79 As shown, when the end of plane 229b away from the first inclined plane 229a contacts the top of inclined plane 221k (or in other words, the top of the second inclined plane 229c contacts the top of inclined plane 221k), the first part 21 can complete the second segment of the stroke. Figure 3 As shown, when the second segment of the stroke is completed, the first part 21 will open up by an angle b relative to the second part 23, for example, angle b can be about 75°. As mentioned above, during the second segment of the stroke, the first part 21 needs to be manually rotated by the user.

[0394] Combination Figure 78 and Figure 80As shown, during the second rotational stroke, the protrusion 227a will sequentially enter each mating groove 222p. At the end of the second rotational stroke, the protrusion 227a can slide out of one mating groove 222p and enter the slide groove 222q. During the second rotational stroke, as the protrusion 227a enters and exits each mating groove 222p, a displacement occurs between the protrusion mating part 227 and the bushing 222 along the rotation axis of the bushing 222, causing the protrusion mating part 227 to impact the bushing 222. Therefore, the user can experience tactile feedback.

[0395] As shown in Figure 3, after the first part 21 opens at an angle b relative to the second part 23, the first part 21 can begin to enter the third stroke. The rotational characteristics of the first part 21 in the third stroke are similar to those in the first stroke; the first part 21 also rotates automatically in the third stroke. This will be explained in detail below.

[0396] like Figure 79 and Figure 81 As shown, when the third stroke begins, the top of the second inclined plane 229c contacts the top of the inclined plane 221k. Under the combined action of the elastic element 228 and the inclined plane 221k, the driven element 229 will perform a compound motion. The driven element 229 will rotate in the opening direction and move towards the second part 221b until the root of the second inclined plane 229c (i.e., the end of the second inclined plane 229c facing away from the plane 229b) contacts the top of the inclined plane 221k. When the driven element 229 moves, the bushing 222 and the first part 21 will also rotate in the opening direction around the second part 221b.

[0397] like Figure 83 and Figure 84 As shown, the limiting protrusion 222r on the bushing 222 can enter the limiting groove 232h of the third main housing 232, and the limiting protrusion 222r abuts against the inner wall of the limiting groove 232h. At this time, the bushing 222 cannot continue to rotate in the opening direction, so the first part 21 also stops rotating.

[0398] When the follower 229, bushing 222, and first part 21 stop rotating, the first part 21 will complete the third rotational stroke, as follows: Figure 5 As shown, the first part 21 will open relative to the second part 23 by an angle c, for example, approximately 90°. It is easy to understand that during the third stroke, the first part 21 is driven to rotate by the bushing 222, so the first part 21 rotates automatically without the user applying external force.

[0399] In this embodiment, the engagement of the limiting groove 232h and the limiting protrusion 222r allows the third main housing 232 to limit the movement of the first part 21. Because the third main housing 232 is larger (compared to the shaft assembly 22) and has better structural strength, the assembly reliability of the limiting groove 232h and the limiting protrusion 222r is higher, thus ensuring the reliability of the main unit 2's engagement. It is understood that, depending on actual needs, in other embodiments, the engagement of the two-stage stepped follower with the two-stage stepped first shaft 221 can be used to stop the first part 21 from rotating at the end of the third stroke, eliminating the need for the limiting protrusion 222r on the bushing and the limiting groove 232h on the third main housing 232.

[0400] Combination Figure 80 and Figure 82 As shown, during the third rotational stroke, the protrusion 227a will slide smoothly within the groove 222q. No displacement along the rotation axis of the bushing 222 will occur between the protrusion mating part 227 and the bushing 222, and the protrusion mating part 227 will not impact the bushing 222. Therefore, when the user touches the first part 21, the user will not experience any tactile feedback.

[0401] Combination Figure 73 , Figure 67 and Figure 62 As shown, during the opening process of the first part 21, the electrical connection terminal 261 of the flexible circuit board 26 will rotate with the first part 21, and the winding part of the flexible circuit board 26 can gradually loosen, and the diameter of the winding part can gradually increase.

[0402] As can be easily understood from the above description of the opening process of the host 2, the entire process of closing the opened first part 21 requires manual rotation of the first part 21 in the opposite direction of the opening direction until the first part 21 engages with the open button. During the stroke of the first part 21 as the angle decreases from angle b to angle a, the protrusions 227a slide into and out of the respective mating grooves 222p, causing the protrusion mating parts 227 to impact the bushing 222, thus providing tactile feedback. During other strokes, since the protrusions 227a slide smoothly within the slide groove 222q, the protrusion mating parts 227 do not impact the bushing 222, therefore there is no tactile feedback. Furthermore, during the closing process of the first part 21, the electrical connection end 261 of the flexible circuit board 26 will rotate with the first part 21, allowing the wound portion of the flexible circuit board 26 to gradually tighten, and the diameter of the wound portion to gradually decrease.

[0403] As can be easily understood from the above description, the assembly structure of the first shaft 221, follower 229, elastic member 228, and bushing 222 in the rotating shaft assembly 22 is used to construct the cam mechanism and realize the opening and closing of the host 2. The second shaft 223 in the rotating shaft assembly 22 is used to mount and wind the flexible circuit board 26. In this embodiment, by designing the first shaft 221 and the second shaft 223 separately, it is convenient to assemble the flexible circuit board 26 onto the second shaft 223 and the bushing 222.

[0404] Due to manufacturing errors, the first shaft 221 and the second shaft 223 may not be aligned after assembly (the axis of the first shaft 221 and the axis of the second shaft 223 do not coincide). Without appropriate measures, this can cause stress in the shaft assembly 22 during mechanical movement, reducing its reliability and potentially leading to abnormal noise. In this embodiment, by mates the end 221d of the first shaft 221 with the groove 223e of the second shaft 223, assembly tolerances can be absorbed, thereby reducing or avoiding stress caused by misalignment.

[0405] Unlike this embodiment, in other embodiments, the first and second shafts may not be connected, and the end of the second shaft may not have a groove for receiving the end of the first shaft. Alternatively, in other embodiments, there may be no design where the flexible circuit board is wound around the shaft, and a single integrated shaft can be used to replace the first shaft 221 and the second shaft 223. In this case, the limiting member 226 can be eliminated.

[0406] As can be easily understood from the above description, the assembly structure of the elastic element 228, the protruding mating element 227, and the bushing 222 in the pivot assembly 22 is used to provide tactile feedback during the opening and closing of the main unit 2. In other embodiments, this tactile feedback design can be omitted, that is, the sliding groove 222q and mating groove 222p on the partition 222n of the protruding mating element 227 and the bushing 222 can be omitted. In this case, the elastic element can directly abut against the partition 222n.

[0407] In this embodiment, when the bushing 222 rotates, the shaft contact 224 installed on the bushing 222 rotates together with the bushing 222. At the same time, the shaft contact 224 maintains contact with the first shaft 221 and the second shaft 223, that is, the shaft contact 224 slides in contact with the first shaft 221 and the second shaft 223.

[0408] Two feeding paths for the antenna system of host 2

[0409] In this embodiment, both the first frame 213a and the third host housing 232 of the host 2 can serve as antennas in the antenna system of the host 2. The two feeding paths of the antenna system of the host 2 will be described below.

[0410] like Figure 70As shown, the first frame 213a can contact the feed spring 212f of the first host circuit board assembly 212, thereby allowing radio frequency signals to be fed into the first frame 213a through the feed spring 212f. Furthermore, the first frame 213a can contact the grounding springs 212b, 212c, 212d, and 212e of the first host circuit board assembly 212, thereby enabling the first frame 213a to be grounded. Thus, the first frame 213a can function as an antenna.

[0411] As described above, the first frame 213a is connected to the bushing 222. The shaft contact 224 on the bushing 222 contacts both the first shaft 221 and the second shaft 223. Both the first shaft 221 and the second shaft 223 are connected to the third main housing 232. Therefore, radio frequency signals can be transmitted from the first frame 213a through the bushing 222, the shaft contact 224, the first shaft 221, and the second shaft 223 to the third main housing 232. Therefore, the third main housing 232 can also serve as an antenna.

[0412] As can be seen, starting from the first host circuit board assembly 212, the first power supply path of the antenna system is formed by passing through the physical mechanical structure to the first frame 213a and the third host housing 232.

[0413] When the main unit 2 is in the closed state, there is a small gap, for example, 0.1 mm, between the first frame 213a and the third main unit housing 232 along the axial direction (or the thickness direction of the main unit 2). Due to this gap, the first frame 213a can feed power to the third main unit housing 232 through coupling, so that the third main unit housing 232 can become an antenna.

[0414] As can be seen, starting from the first host circuit board assembly 212, the power supply path passes through the physical mechanical structure to the first frame 213a, and then is electrically coupled to the third host housing 232, forming the second power supply path of the antenna system.

[0415] When the host 2 is in the closed state, the radiation from the third host housing 232 in the second feeding path is stronger, and the host 2, together with the first frame 213a, ensures antenna performance. When the host 2 is in the open state, the radiation from the third host housing 232 in the second feeding path is weaker, and the antenna performance is mainly ensured by the radiation from the first frame 213a. However, compared to the closed state of the host 2, the radiation direction of the antenna system changes in the open state, which can meet the communication requirements of the host 2 in the open state. Therefore, this embodiment, by designing two feeding paths for the antenna system, can meet the different communication requirements of the host 2 in the open and closed states, and ensure the antenna performance of the host 2 in different states.

[0416] It is easy to understand that in other embodiments, there may be no second power supply path, that is, the first frame 213a will not supply power to the third host housing 232 through coupling.

[0417] In this embodiment, the flexible circuit board 26 can interfere with the radiation performance of the first frame 213a and the third main unit housing 232, especially if the flexible circuit board 26 is longer. As mentioned above, the grounding portion 264a of the flexible circuit board 26 can be connected to the first frame 213a through a conductor, thus grounding the flexible circuit board 26 and preventing it from interfering with the antenna radiation performance of the main unit 2. In other embodiments, depending on product requirements, the above-mentioned grounding design for the flexible circuit board 26 may not be necessary.

[0418] Headphones 3

[0419] In this embodiment, the structures of the first earphone 31 and the second earphone 32 can be completely identical. The following description will take the first earphone 31 as an example.

[0420] like Figure 85 and Figure 86 As shown, the first earphone 31 may include an earbud 311, an earbud support assembly 316, a first electrode 312, an earphone front shell assembly 313, a second electrode 314, an earphone rear shell assembly 315, and an electronic component 317. The earbud support assembly 316 and the first electrode 312 can both be mounted at one end of the earphone front shell assembly 313, and the second electrode 314 and the earphone rear shell assembly 315 can both be mounted at the other end of the earphone front shell assembly 313. The earbud 311 and the earbud support assembly 316 are located at the same end of the earphone front shell assembly 313, and the earbud 311 is mounted at the end of the earbud support assembly 316 away from the earphone front shell assembly 313. The electronic component 317 can be installed within the space enclosed by the earbud support assembly 316, the first electrode 312, the earphone front shell assembly 313, the second electrode 314, and the earphone rear shell assembly 315.

[0421] The following text first describes the structure and assembly of the earbud 311, earbud support assembly 316, first electrode 312, earbud front shell assembly 313, second electrode 314, and earbud rear shell assembly 315 in the first earphone 31, and then describes the structure and assembly of the electronic component 317.

[0422] like Figure 85As shown, in this embodiment, the first electrode 312, the earphone front shell assembly 313, the second electrode 314, and the earphone rear shell assembly 315 can generally form an octahedral shape. The outer peripheral surface of the octahedron can include planes and curved surfaces, which are connected and alternately arranged to form a circumference (that is, each plane is connected between two curved surfaces, and each curved surface is connected between two planes). The octahedral shape of the first earphone 31 is a centrally symmetrical shape. In other embodiments, the first earphone can also have other centrally symmetrical shapes, such as being roughly cylindrical or tetrahedral.

[0423] In this embodiment, the radial dimension of the first earphone 31 can be greater than the depth of the first receiving groove 213y. For example, the radial dimension of the first earphone 31 can be at least twice the depth of the first receiving groove 213y. This radial dimension can be the distance between two directly opposite planes on the first earphone 31.

[0424] Earphone front shell assembly 313

[0425] like Figure 87 , Figure 88 and Figure 89 As shown, the headphone front shell assembly 313 may include the headphone front shell 313z, the noise-canceling microphone mesh 313j, and the headphone magnet 313g.

[0426] like Figure 87 and Figure 88 As shown, the earphone front shell 313z can be a hollow cylindrical structure with openings at both ends. The earphone front shell 313z can include a first part 313a, a second part 313b, and a third part 313c connected in sequence. The circumferential length of the first part 313a can be less than the circumferential length of the second part 313b, and the circumferential length of the second part 313b can be less than the circumferential length of the third part 313c. The circumferential length refers to the dimension along the centerline of the cylindrical structure surrounding the earphone front shell 313z. The third part 313c can be approximately an octahedral cylindrical structure. The wall of the third part 313c can include flat portions and curved portions, with the flat portions and curved portions connected and alternately arranged to form a circumference (i.e., each flat portion is connected between two curved portions, and each curved portion is connected between two flat portions).

[0427] like Figure 87 and Figure 90As shown, the end of the first part 313a furthest from the second part 313b can form a mounting groove 313f, which can surround the entire earphone. A pickup channel 313e can also be formed inside the wall of the earphone front shell 313z, extending approximately in a straight line. One end of the pickup channel 313e penetrates the bottom surface of the mounting groove 313f, and the other end communicates with the inner cavity of the earphone front shell 313z. A through hole 313d can be formed on the second part 313b, communicating with the inner cavity of the earphone front shell 313z.

[0428] Noise Cancelling Microphone Network 313j

[0429] The noise-canceling microphone mesh 313j can be roughly sheet-like and may include several layers of material, such as acoustic mesh fabric, adhesive layers, etc. For example... Figure 89 and Figure 90 As shown, the noise-canceling microphone mesh 313j can be fixed inside the headphone front shell 313z and cover the end of the pickup channel 313e away from the mounting slot 313f. The sound in the pickup channel 313e can pass through the noise-canceling microphone mesh 313j.

[0430] 313g of headphone magnet

[0431] like Figure 89 As shown, the headphone magnet 313g in this embodiment can be a single magnet. The headphone magnet 313g can have a single magnetic field direction. Alternatively, the headphone magnet 313g can have at least two magnetic field directions, and the headphone magnet 313g can form a Heilbeck array (which can be obtained by magnetizing different regions of a physically single magnet in different directions). For example, the headphone magnet 313g is a Heilbeck array with two different magnetic field directions.

[0432] In other embodiments, the headphone magnet may be composed of at least two individual magnets joined together. The headphone magnet may have at least two magnetic field directions, and the headphone magnets form a Heilbeck array.

[0433] like Figure 89 As shown, the headphone magnet 313g in this embodiment can be generally a bent plate structure, which can be bent along the direction surrounding the center line of the first headphone 31. The shape of the headphone magnet 313g can be adapted to the shape of the inner wall of the third part 313c of the headphone front shell 313z. The headphone magnet 313g can be fixed to the inner wall of the third part 313c of the headphone front shell 313z, for example, fixed to the inner wall of the arcuate portion of the third part 313c.

[0434] like Figure 89As shown, this embodiment can have four headphone magnets 313g. The four headphone magnets 313g can be evenly distributed at equal intervals on the inner wall of the third part 313c. Each arc-shaped part of the third part 313c has one headphone magnet 313g installed on its inner wall. The four headphone magnets 313g can have the same specifications, and the magnetic field directions of the four headphone magnets 313g can be consistent.

[0435] In other embodiments, the number of headphone magnets can be designed according to product needs. For example, there can be only one headphone magnet, which can be arranged in a closed ring structure, and the shape of the headphone magnet can match the inner wall shape of the third part 313c. The headphone magnet can form a Heilbeck array, and the four regions of the headphone magnet corresponding one-to-one with the four arc-shaped parts of the third part 313c can each have different magnetic field directions.

[0436] Alternatively, there could be three headphone magnets, each of which could be a curved structure surrounding the center line of the first headphone. These three magnets could be spaced apart on the inner wall of the third part of the headphone's front shell, either evenly spaced or non-uniformly spaced. In this design, the third part of the headphone's front shell could be approximately an octahedral cylindrical structure or approximately a cylindrical structure.

[0437] Assembly process of assembly jig 100 and earphone magnet 313g

[0438] In this embodiment, to ensure accurate installation of the magnet, an assembly fixture can be used to assist in the installation of the earphone magnet 313g. Depending on the product's assembly requirements, the earphone magnet 313g can be directly assembled with the earphone front shell 313z, and the assembly fixture can be customized accordingly. Alternatively, as... Figure 91 As shown, alternatively, the earbud support assembly 316 and the first electrode 312 can be first installed onto the earphone front shell 313z to form an intermediate assembly 200, and then the earphone magnet 313g can be installed into the earphone front shell 313z of the intermediate assembly 200. The assembly fixture can be customized accordingly. The following will explain the latter assembly method as an example.

[0439] like Figure 91 and Figure 92As shown, this embodiment provides an assembly fixture 100 for assembling the intermediate component 200. The intermediate component 200 may include a pre-assembled earbud support assembly 316, a first electrode 312, and an earphone front shell 313z (the assembly structure of the earbud support assembly 316, the first electrode 312, and the earphone front shell 313z will be described in detail below). To facilitate the handling and positioning of the intermediate component 200, a clamp 300 can be fitted around the outer periphery of the earphone front shell 313z within the intermediate component 200. The clamp 300 may be in the form of a clamp, wrapping around and securing the earphone front shell 313z. The clamp 300 can also be used in other assembly processes of the first earphone 31.

[0440] like Figure 92 As shown, the assembly fixture 100 in this embodiment may include a base 120, a fixture magnet 130, and a top cover 110.

[0441] like Figure 93 and Figure 94 As shown, the base 120 may include a base plate 121 and a base magnet 122 fixed to the base plate 121. A cover positioning hole 121a may be formed on the base plate 121. For example, there are two cover positioning holes 121a, located at opposite ends of the base plate 121. A region on the base plate 121 (e.g.) Figure 93 The right-hand area (in the viewpoint) can also have a workpiece positioning slot 121c, a fixture magnet mounting slot 121b, and a fixture receiving slot 121e.

[0442] like Figure 93 As shown, the inner surface of the bottom of the workpiece positioning groove 121c can conform to the outer surface of the first electrode 312. A through hole 121d can be formed in the bottom wall of the workpiece positioning groove 121c, which is used for the earphone front shell 313z and the earphone bracket assembly 316 to pass through.

[0443] like Figure 93 As shown, the fixture magnet mounting slot 121b can be located outside the workpiece positioning slot 121c and can communicate with the workpiece positioning slot 121c. It can be considered that the fixture magnet mounting slot 121b penetrates the side wall of the workpiece positioning slot 121c. The number of fixture magnet mounting slots 121b can be the same as the number of fixture magnets 130; for example, there can be four fixture magnet mounting slots 121b. The four fixture magnet mounting slots 121b can be evenly distributed around the workpiece positioning slot 121c.

[0444] Combination Figure 92 and Figure 94 As shown, each jig magnet mounting slot 121b can accommodate one jig magnet 130. A jig magnet 130 may consist of a single magnet or may be composed of at least two single magnets connected together.

[0445] like Figure 93 As shown, the fixture receiving groove 121e can be located on the outer periphery of the workpiece positioning groove 121c and can communicate with the workpiece positioning groove 121c. The fixture receiving groove 121e can be located between the two fixture magnet mounting grooves 121b.

[0446] like Figure 93 As shown, another area of ​​the base plate 121 (e.g.) Figure 93 The same workpiece positioning groove 121c, through hole 121d, fixture magnet mounting groove 121b, and fixture receiving groove 121e can also be provided in the left-hand area (as seen from the perspective). This design allows the assembly fixture 100 to assemble two intermediate components 200 simultaneously. The positioning groove 121c, through hole 121d, fixture magnet mounting groove 121b, and fixture receiving groove 121e in the two areas of the base plate 121 can be located between the two upper cover positioning holes 121a.

[0447] like Figure 95 and Figure 96 As shown, the upper cover 110 may include a cover plate 111, an upper cover positioning post 113, an upper cover limiting post 112, and an upper cover magnet 114.

[0448] There may be two upper cover positioning posts 113, with the two upper cover positioning posts 113 located at opposite ends of the cover plate 111. One area of ​​the cover plate 111 (e.g.) Figure 95 In the right-hand area (as seen from the perspective), magnet placement through holes 111a can be opened. The number of magnet placement through holes 111a can be the same as the number of headphone magnets 313g, for example, there can be four magnet placement through holes 111a. The four magnet placement through holes 111a can roughly form a 2*2 matrix.

[0449] The upper cover limiting post 112 is located on one side of the cover plate 111 in the thickness direction, and the center of the upper cover limiting post 112 can be approximately located between the four magnet placement through holes 111a. Furthermore, for each magnet placement through hole 111a and the upper cover limiting post 112, a portion of the projection of the upper cover limiting post 112 onto the axial direction of the magnet placement through hole 111a will fall within the projection of that magnet placement through hole 111a onto its axial direction. That is, from... Figure 95 From a visual perspective, each magnet placement through-hole 111a contains a portion of the top cover limiting post 112, which can be referred to as the limiting portion. It is easy to understand that the number of these limiting portions corresponds to the number of headphone magnets 313g. The shape of the top cover limiting post 112 is adapted to the shape of the inner cavity of the headphone front shell 313z.

[0450] The upper cover magnet 114 can be fixed to the cover plate 111 and can be located on the same side of the cover plate 111 as the upper cover limiting post 112.

[0451] like Figure 95 and Figure 96 As shown, another area of ​​cover plate 111 (e.g.) Figure 95 The left-hand area (in the viewpoint) can also be designed with the same magnet placement through-hole 111a and top cover limiting post 112. This design allows the assembly jig 100 to assemble two intermediate components 200 simultaneously. The magnet placement through-hole 111a and top cover limiting post 112 in the two areas of the cover plate 111 can be located between the two top cover positioning posts 113.

[0452] The following will combine Figures 97-101 This illustrates the process of using assembly jig 100 to load four headphone magnets 313g into an intermediate component 200.

[0453] Combination Figure 91 and Figure 97 As shown, the fixture 300 and intermediate component 200 are first positioned on the base 120, such that the annular portion of the fixture 300 is placed into the workpiece positioning groove 121c, and the other portion of the fixture 300 is placed into the fixture receiving groove 121e; the earphone bracket assembly 316 and the earphone front shell 313z are then inserted into the through hole 121d; the first electrode 312 is inserted into the workpiece positioning groove 121c, and the outer surface of the first electrode 312 mates with the inner surface of the workpiece positioning groove 121c. At this time, each fixture magnet 130 corresponds to a mounting position within the earphone front shell 313z for mounting the earphone magnet 313g.

[0454] Combination Figure 98 , Figure 96 and Figure 97 As shown, the upper cover 110 is installed onto the base 120, so that the cover plate 111 contacts the base 120, and the upper cover positioning post 113 is inserted into the upper cover positioning hole 121a, so that the upper cover magnet 114 and the base magnet 122 are magnetically attracted. Figure 96 and Figure 91 As shown, at this time, the upper cover limiting post 112 in the upper cover 110 will be inserted into the inner cavity of the earphone front shell 313z. Combined with... Figure 99 , Figure 100 and Figure 94 Each magnet placement through-hole 111a contains a portion of a workpiece positioning groove 121c; that is, the projections of different regions of the workpiece positioning groove 121c onto the axial direction of the magnet placement through-hole 111a fall into each magnet placement through-hole 111a. Figure 99 and Figure 100 From the perspective of the top cover 110, each magnet placement through hole 111a contains a part of the headphone front shell 313z, that is, the projections of different areas of the headphone front shell 313z onto the axial direction of the magnet placement through hole 111a fall into each magnet placement through hole 111a.

[0455] And, as Figure 100 As shown, each limiting portion of the upper cover limiting post 112 forms a gap B between itself and the inner wall of the earphone front shell 313z (only one gap B is shown in the figure for simplicity). Each gap B is used to accommodate an earphone magnet 313g. There is a jig magnet 130 near each gap B.

[0456] like Figure 101 As shown, four headphone magnets 313g are inserted into four gaps B through four magnet placement through holes 111a, respectively, so that each gap B contains one headphone magnet 313g, and each headphone magnet 313g is positioned in its mounting position within the headphone front shell 313z. The fixture magnet 130 near each gap B can magnetically attract the headphone magnet 313g within that gap B, thus holding the headphone magnet 313g in its mounting position within the headphone front shell 313z. This achieves the pre-positioning of the headphone magnet 313g.

[0457] Next, the top cover 110 can be removed to expose the intermediate component 200 and the earphone magnet 313g pre-positioned therein. Then, the earphone magnet 313g can be fixed to the inner wall of the earphone front shell 313z using a suitable process. For example, an adhesive process can be used to bond the earphone magnet 313g to the inner wall of the earphone front shell 313z. The adhesive used in the adhesive process can be, for example, a fast-drying adhesive.

[0458] As can be easily understood from the above description, the base 120 can effectively position the intermediate component 200, and the mating structure between the top cover 110 and the base 120 can accurately define the installation space of the earphone magnet 313g. The jig magnet 130 can conveniently and reliably hold the earphone magnet 313g in its installation position within the earphone front shell 313z. Therefore, using the assembly jig 100 can greatly improve the assembly accuracy and reliability of the earphone magnet 313g, and also simplify the assembly process and improve mass production capabilities.

[0459] First electrode 312

[0460] like Figure 102 As shown, the first electrode 312 may include an electrode body 312a and a conductive portion 312b. The electrode body 312a may be a generally annular structure surrounding the center line of the first earphone 31. The conductive portion 312b may be generally columnar and may protrude from the inner surface of the electrode body 312a. The first electrode 312 may be made of a conductive material, such as a metal.

[0461] Combination Figure 102 and Figure 87As shown, the first electrode 312 can be mounted to the earphone front shell 313z. The electrode body 312a of the first electrode 312 mates with the second portion 313b of the earphone front shell 313z. The conductive portion 312b of the first electrode 312 can pass through the through hole 313d of the earphone front shell 313z and be electrically connected to the circuit board (described below) of the first earphone circuit board assembly located in the inner cavity of the earphone front shell 313z, so that the first electrode 312 acts as a charging electrode. Detailed assembly structure will be further described below.

[0462] Earbud support assembly 316

[0463] like Figure 103 , Figure 104 and Figure 105 As shown, the earbud support assembly 316 may include an earbud support 316b, a front vent acoustic mesh 316a, and a speaker mesh 316c.

[0464] like Figures 103-105 As shown, the earbud holder 316b may include a holder body 316u, a first skirt 316v, and a second skirt 316w. The holder body 316u may be a generally hollow cylindrical structure with openings at both ends. Both the first skirt 316v and the second skirt 316w may be protrusions on the outer periphery of the holder body 316u, and both may surround the holder body 316u. Both the first skirt 316v and the second skirt 316w may be located between the two ends of the holder body 316u. The first skirt 316v and the second skirt 316w have a certain distance between them.

[0465] like Figure 106 and Figure 103 As shown, the end of the support body 316u near the second skirt 316w may have a notch and roughly form a C-shaped structure. This end of the support body 316u may also have a front vent hole 316x, which penetrates the wall of the support body 316u. The opening of the front vent hole 316x on the outer peripheral surface of the support body 316u may be located on the side of the second skirt 316w facing the first skirt 316v, and this opening may be connected to the second skirt 316w.

[0466] like Figure 105 As shown, a mounting groove 316t can be formed at one end of the bracket body 316u near the first skirt 316v. The bottom wall of the mounting groove 316t is provided with a through hole, which communicates with the inner cavity of the bracket body 316u.

[0467] In this embodiment, the earbud holder 316b may be entirely made of a conductive material, or only partially made of a conductive material. This conductive material may be, for example, a metal. The earbud holder 316b can accommodate the speaker (described below) in the electronic component 317, and therefore may also be referred to as a sound outlet.

[0468] The acoustic mesh 316a for the front vent can be roughly sheet-like and may include several layers of material, such as acoustic mesh and adhesive layers. The figure shows the bent acoustic mesh 316a for the front vent. Figure 105 As shown, the acoustic mesh 316a of the front vent can include a fixed region 316z and a blocking region 316y. The fixed region 316z can be annular. The blocking region 316y can be rectangular strip, and the blocking region 316y can be connected to the inner side of the fixed region 316z. The blocking region 316y allows air and sound waves to pass through.

[0469] like Figure 105 , Figure 104 and Figure 106 As shown, the acoustic mesh 316a of the front vent can be installed onto the earbud holder 316b. The fixing region 316z can be installed on the side of the second skirt 316w away from the first skirt 316v; for example, the adhesive layer in the fixing region 316z can be bonded to this side of the second skirt 316w. The blocking region 316y can be bent into the inner cavity of the holder body 316u and abut against the inner wall of the holder body 316u; for example, the adhesive layer in the blocking region 316y can be bonded to the inner wall of the holder body 316u. Furthermore, the blocking region 316y can block the front vent 316x.

[0470] Combination Figure 103 , Figure 104 and Figure 87 As shown, the earbud holder 316b can be installed into the mounting slot 313f of the headphone front shell 313z. For example, the earbud holder 316b can be bonded to the bottom surface of the mounting slot 313f via an adhesive layer in the fixing area 316z. Detailed assembly structure will be described further below.

[0471] 316c speaker mesh

[0472] like Figure 105 As shown, the speaker mesh 316c can be roughly sheet-like and may include several layers of material, such as acoustic mesh, adhesive layer, PET sheet, etc. Multiple sound outlets can be formed on the speaker mesh 316c.

[0473] like Figure 105 As shown, the speaker mesh 316c can be installed into the mounting slot 316t of the bracket body 316u. The sound from the speaker (described below) inside the cavity of the bracket body 316u will enter the ear through the speaker mesh 316c.

[0474] Depending on product requirements, in other embodiments, the earbud holder may also have other suitable structures, not limited to those described above. The vent hole may not be located on the earbud holder, but rather on the earphone front shell 313z. For example, the vent hole may be located in the first portion 313a of the earphone front shell 313z and communicate with the pickup channel 313e. The diameter of this vent hole may be small (e.g., less than 0.22 mm), in which case the acoustic mesh 316a of the vent hole can be omitted.

[0475] Earplugs 311

[0476] like Figure 107 , Figure 108 and Figure 109 As shown, the earplug 311 may include an inner earplug cover 311a and an outer earplug cover 311b, which can be fixedly connected.

[0477] like Figure 108 and Figure 109 As shown, the earbud inner cover 311a can be roughly a hollow rotating structure with openings at both ends. A plurality of sound outlet holes 311d can be formed at one axial end of the earbud inner cover 311a, and these sound outlet holes 311d are all connected to the inner cavity of the earbud inner cover 311a. These sound outlet holes 311d are spaced apart from each other and can be arranged according to a certain pattern.

[0478] like Figure 108 As shown, in one embodiment, these sound outlet holes 311d can be arranged side by side. The shapes of each sound outlet hole 311d can be identical or similar; for example, each sound outlet hole 311d can be a racetrack-shaped hole. In other embodiments, the shape and arrangement of each sound outlet hole 311d can be designed according to product requirements, for example... Figure 110 The shapes and arrangements of four types of sound outlet holes 311d are shown.

[0479] In this embodiment, the inner cavity of the earplug inner cover 311a is equipped with a speaker, and the sound outlet 311d allows the sound from the speaker to pass through so as to enter the ear (described further below). The end of the earplug inner cover 311a that forms the sound outlet 311d can serve as an anti-earwax structure, which can reduce or prevent earwax from entering the speaker.

[0480] like Figure 109 As shown, the inner wall of the earbud inner cover 311a can also form a slot 311g, which surrounds the entire circumference and is located away from the sound outlet hole 311d. The slot 311g is used to mate with the first skirt 316v of the earbud holder 316b to mount the earbud inner cover 311a to the earbud holder 316b (the detailed assembly structure will be described below).

[0481] like Figure 108 and Figure 109 As shown, the surface of the end of the earbud inner cover 311a facing away from the sound outlet 311d may be provided with a number of second protrusions 311c, which may be spaced apart from each other and surround one circumference.

[0482] like Figures 107-109 As shown, the earbud cover 311b can be generally a hollow, rotating body with openings at both ends. One axial end of the earbud cover 311b can be fixedly connected to the end of the earbud inner cover 311a that forms the sound outlet hole 311d. The earbud cover 311b can surround the outer periphery of the earbud inner cover 311a. The inner wall of the other axial end of the earbud cover 311b can be provided with a plurality of first protrusions 311f. These second protrusions 311c can be spaced apart from each other and surround the earbud.

[0483] In this embodiment, the inner earplug cover 311a can be made of a relatively hard and non-deformable material to form a reliable connection with the earplug support 316b and to serve to accommodate and protect the earplug support 316b. The outer earplug cover 311b can be made of a relatively soft and deformable material to fit snugly and conform to the ear canal.

[0484] Second electrode 314

[0485] like Figure 111 As shown, the second electrode 314 may include an electrode body 314a, an inner support 314b, and a conductive portion 314c. The electrode body 314a may be a generally annular structure surrounding the center line of the first earphone 31. The inner support 314b is located inside the electrode body 314a and may surround the electrode body 314a. The conductive portion 314c may be generally columnar, located inside the electrode body 314a, and may protrude from the inner support 314b. The second electrode 314 may be made of a conductive material, such as a metal.

[0486] Combination Figure 111 and Figure 88 As shown, the second electrode 314 can be connected to the earphone front shell 313z. The electrode body 314a of the second electrode 314 mates with the third portion 313c of the earphone front shell 313z. The conductive portion 314c of the second electrode 314 can be electrically connected to the circuit board (described below) in the second earphone circuit board assembly 317g located within the second electrode 314, so that the second electrode 314 serves as another charging electrode. Detailed assembly structure will be described further below.

[0487] Headphone back shell assembly 315

[0488] like Figure 112 , Figure 113 and Figure 114As shown, the earphone back cover assembly 315 may include an earphone back cover 315a, a first main microphone mesh 315g, an antenna 315f, a back cover bracket 315d, and a second main microphone mesh 315e. The first main microphone mesh 315g, the antenna 315f, the back cover bracket 315d, and the second main microphone mesh 315e can all be housed inside the earphone back cover 315a.

[0489] like Figure 113 , Figure 114 and Figure 115 ( Figure 115 for Figure 112 As shown in the AA cross-sectional view of the earphone back shell 315a, the earphone back shell 315a can be roughly bowl-shaped. The earphone back shell 315a may include a bottom wall 315h and a peripheral side wall 315i surrounding the periphery of the bottom wall 315h, the peripheral side wall 315i and the bottom wall 315h forming an open cavity. A sound pickup hole 315c can be formed on the bottom wall 315h, and the sound pickup hole 315c communicates with the inner cavity of the earphone back shell 315a. Several wind noise prevention holes 315b can be formed on the peripheral side wall 315i, and the wind noise prevention holes 315b communicate with the inner cavity of the earphone back shell 315a. For example, there can be two wind noise prevention holes 315b, and the two wind noise prevention holes 315b can be distributed symmetrically on both sides of the sound pickup hole 315c. Alternatively, the number of windproof noise-proof holes 315b can be greater than or equal to 2, such as 3 or 4, and these windproof noise-proof holes 315b can be set at intervals.

[0490] Antenna 315f

[0491] In this embodiment, antenna 315f can be a common-mode antenna, which may include two physically separated but coupled antenna stubs. The two antenna stubs are coupled to enable antenna 315f to operate in a set frequency band. Antenna 315f may be, for example, a Bluetooth antenna, and the set frequency band may be, for example, 2.4 GHz.

[0492] like Figure 116 As shown, in Embodiment 1 of this example, antenna 315f may include a first antenna stub 315z and a second antenna stub 315y. Both the first antenna stub 315z and the second antenna stub 315y may be approximately bent narrow strip structures.

[0493] like Figure 116As shown, the first antenna stub 315z may include a first segment 315z3 and a second segment 315z4. The first segment 315z3 and the second segment 315z4 are connected by a bend, for example, they can be approximately perpendicular. The end of the first segment 315z3 away from the second segment 315z4 is called the feed end 315z1, and the end of the second segment 315z4 away from the first segment 315z3 is called the end end 315z2. That is, the feed end 315z1 and the end end 315z2 are the opposite ends of the first antenna stub 315z. The first segment 315z3 can be approximately straight, and the second segment 315z4 can be bent.

[0494] like Figure 116 As shown, similarly, the second antenna stub 315y can include a third segment 315y3 and a fourth segment 315y4. The third segment 315y3 and the fourth segment 315y4 are connected by a bend, for example, they can be approximately perpendicular. The end of the third segment 315y3 furthest from the fourth segment 315y4 is called the feed end 315y1, and the end of the fourth segment 315y4 furthest from the third segment 315y3 is called the end end 315y2. That is, the feed end 315y1 and the end end 315y2 are the opposite ends of the second antenna stub 315y. The third segment 315y3 can be approximately straight, and the fourth segment 315y4 can be bent. Figure 116 As shown, the first antenna stub 315z and the second antenna stub 315y are essentially centrally symmetrical, meaning that the first antenna stub 315z rotates 180° around a center and then essentially coincides with the second antenna stub 315y. For the entire area occupied by the first antenna stub 315z and the second antenna stub 315y, from the feed end 315z1 to the end end 315z2 of the first antenna stub 315z, the first antenna stub 315z extends along a path bending from the outside in (e.g., in...). Figure 116 From the perspective of view, the first antenna stub 315z bends clockwise; from the feed end 315y1 and the end end 315y2 of the second antenna stub 315y, the second antenna stub 315y bends and extends along a path from the outside to the inside (e.g., in...). Figure 116 From the viewing angle, the second antenna stub 315y bends clockwise. Feed ends 315z1 and 315y1 are on the outside, and are relatively far apart. End ends 315z2 and 315y2 are both located between feed ends 315z1 and 315y1, and are relatively close together. The coupling between end ends 315z2 and 315y2 allows antenna 315f to operate in the 2.4 GHz band.

[0495] As will be described below, both feed terminals 315z1 and 315y1 are connected to a feed point on the circuit board of the third earphone circuit board assembly 317h in the electronic assembly 317, so that both the first antenna stub 315z and the second antenna stub 315y can transmit and receive signals. These two feed points can be symmetrical about the centerline of the first earphone 31.

[0496] Combination Figure 116 , Figure 112 and Figure 115 As shown, in Embodiment 1, antenna 315f can be disposed on the inner wall of the earphone rear shell 315a. Feed ends 315z1 and 315y1 can both be located on the inner surface of the peripheral sidewall 315i of the earphone rear shell 315a, and ends 315z2 and 315y2 can both be located on the inner surface of the bottom wall 315h of the earphone rear shell 315a. Specifically, for the first antenna stub 315z, from feed end 315z1 to end 315z2, the second segment 315z4 of the first antenna stub 315z can extend approximately along the direction from the peripheral sidewall 315i to the bottom wall 315h. For the second antenna stub 315y, from feed end 315y1 to end 315y2, the fourth segment 315y4 of the second antenna stub 315y can also extend approximately along the direction from the peripheral sidewall 315i to the bottom wall 315h.

[0497] Antenna 315f can be formed on the inner wall of the earphone back cover 315a, for example, by laser direct structuring (LDS) process, i.e., antenna 315f can be an LDS antenna.

[0498] Different wearing angles of the first earphone 31 within the ear canal will cause the first antenna stub 315z or the second antenna stub 315y to be closer to the human body. The antenna performance of the antenna stub that is closer to the human body will decrease (e.g., the antenna efficiency will be lower), and the signal quality of the antenna will deteriorate.

[0499] Therefore, when the first earphone 31 operates at different wearing angles, it can detect which antenna stub in the antenna 315f has better signal quality and select the antenna stub with better signal quality (the one further away from the human body) as the feed terminal, and the other stub as the ground terminal. Illustratively, the received signal strength indicator (RSSI) value can be detected to determine the signal quality of the antenna stub. The first earphone 31 can have a built-in controller and switching circuit. The controller determines which antenna stub has better signal quality and switches that stub as the feed terminal and the antenna stub with poorer signal quality as the ground terminal via the switching circuit. This controller can, for example, be located on a circuit board in the second earphone circuit board assembly 317g (described below). The switching circuit can, for example, be located on a circuit board in the third earphone circuit board assembly 317h (described below). It is understood that the positions of the controller and the switching circuit can be designed as needed and are not limited to those described above.

[0500] For example, when the first earphone 31 is worn at a first wearing angle, the second antenna stub 315y is further away from the human body. The first earphone 31 can detect that the signal quality of the second antenna stub 315y is better and select the second antenna stub 315y as the feed terminal and the first antenna stub 315z as the ground terminal. Alternatively, when the first earphone 31 is worn at a second wearing angle, the first antenna stub 315z is further away from the human body. The first earphone 31 can detect that the signal quality of the first antenna stub 315z is better and select the first antenna stub 315z as the feed terminal and the second antenna stub 315y as the ground terminal.

[0501] The antenna 315f in this embodiment, by designing two antenna branches that are centrally symmetrically distributed and coupled, can ensure the antenna performance of the first earphone 31 when the user wears the first earphone 31 at different wearing angles, thereby ensuring the communication quality of the first earphone 31 and guaranteeing the user experience.

[0502] like Figure 117 As shown, in the second embodiment of this invention, the antenna 315f may include a first antenna stub 315x and a second antenna stub 315w. Both the first antenna stub 315x and the second antenna stub 315w may be approximately bent narrow strip structures.

[0503] like Figure 117As shown, the first antenna stub 315x may include a first segment 315x3 and a second segment 315x4. The first segment 315x3 and the second segment 315x4 are connected by a bend, for example, they can be approximately perpendicular. The end of the first segment 315x3 away from the second segment 315x4 is called the feed end 315x1, and the end of the second segment 315x4 away from the first segment 315x3 is called the end end 315x2. That is, the feed end 315x1 and the end end 315x2 are the opposite ends of the first antenna stub 315x. The first segment 315x3 can be approximately straight, and the second segment 315x4 can be bent.

[0504] like Figure 117 As shown, similarly, the second antenna stub 315w can include a third segment 315w3 and a fourth segment 315w4. The third segment 315w3 and the fourth segment 315w4 are connected by a bend, for example, they can be approximately perpendicular. The end of the third segment 315w3 away from the fourth segment 315w4 is called the feed end 315w1, and the end of the fourth segment 315w4 away from the third segment 315w3 is called the end end 315w2. That is, the feed end 315w1 and the end end 315w2 are the opposite ends of the second antenna stub 315w. The third segment 315w3 can be approximately straight, and the fourth segment 315w4 can be bent.

[0505] like Figure 117 As shown, the first antenna stub 315x and the second antenna stub 315w can be basically centrally symmetrical.

[0506] Unlike Embodiment 1 described above, in Embodiment 2, for the entire area occupied by the first antenna stub 315x and the second antenna stub 315w, from the feed end 315x1 to the end end 315x2 of the first antenna stub 315x, the first antenna stub 315x extends along a path that bends from the inside out (e.g., in...). Figure 117 From the perspective of view, the first antenna stub 315x bends counterclockwise; from the feed end 315w1 and the end end 315w2 of the second antenna stub 315w, the second antenna stub 315w bends and extends along a path from the inside out (e.g., in...). Figure 117 From the viewing angle, the second antenna stub 315w bends counterclockwise. Feed end 315x1, end 315x2, feed end 315w1, and end 315w2 are all on the outside. Feed end 315x1 and feed end 315w1 are close together and coupled to enable antenna 315f to operate in the 2.4 GHz band.

[0507] Reference and combination Figure 117 , Figure 112 and Figure 115As shown, in Embodiment 2, the antenna 315f can be disposed on the inner wall of the earphone rear shell 315a. Both the feed end 315x1 and the feed end 315w1 can be located on the inner surface of the peripheral sidewall 315i of the earphone rear shell 315a. Both the end ends 315x2 and 315w2 can be located on the inner surface of the bottom wall 315h of the earphone rear shell 315a, and can both be close to the peripheral sidewall 315i. Unlike Embodiment 1, for the first antenna stub 315x, from the feed end 315x1 to the end end 315x2, the second segment 315x4 of the first antenna stub 315x can extend approximately along the direction from the bottom wall 315h to the peripheral sidewall 315i. For the second antenna stub 315w, from the feed end 315w1 to the end end 315w2, the fourth segment 315w4 of the second antenna stub 315w can also extend approximately along the direction from the bottom wall 315h to the peripheral sidewall 315i.

[0508] This second embodiment provides another antenna topology 315f that can meet the antenna design requirements of the first earphone 31.

[0509] like Figure 118 As shown, in Embodiment 3 of this example, antenna 315f may include a first antenna stub 315u and a second antenna stub 315v. Both the first antenna stub 315u and the second antenna stub 315v may be approximately bent narrow strip structures.

[0510] like Figure 118 As shown, the first antenna stub 315u may include a first segment 315u3 and a second segment 315u4. The first segment 315u3 and the second segment 315u4 are connected by a bend, for example, they can be approximately perpendicular. The end of the first segment 315u3 away from the second segment 315u4 is called the feed end 315u1, and the end of the second segment 315u4 away from the first segment 315u3 is called the end end 315u2. That is, the feed end 315u1 and the end end 315u2 are the opposite ends of the first antenna stub 315u. The first segment 315u3 can be approximately straight, and the second segment 315u4 can be bent.

[0511] like Figure 118 As shown, similarly, the second antenna stub 315v can include a third segment 315v3 and a fourth segment 315v4. The third segment 315v3 and the fourth segment 315v4 are connected by a bend, for example, they can be approximately perpendicular. The end of the third segment 315v3 away from the fourth segment 315v4 is called the feed end 315v1, and the end of the fourth segment 315v4 away from the third segment 315v3 is called the end end 315v2. That is, the feed end 315v1 and the end end 315v2 are the opposite ends of the second antenna stub 315v. The third segment 315v3 can be approximately straight, and the fourth segment 315v4 can be bent.

[0512] Unlike Embodiment 1 described above, in Embodiment 3, for the entire area occupied by the first antenna stub 315u and the second antenna stub 315v, from the feed end 315u1 to the end end 315u2 of the first antenna stub 315u, the first antenna stub 315u extends along a path bending from the outside to the inside (e.g., in...). Figure 118 From a viewing angle, the first antenna stub 315u bends clockwise; from the feed end 315v1 and the end end 315v2 of the second antenna stub 315v, the second antenna stub 315v extends along a path bending from the inside out (e.g., in...). Figure 118 From the viewing angle, the second antenna stub 315v bends counterclockwise. The feed end 315u1, feed end 315v1, and end 315v2 are all on the outside, while the end 315u2 is on the inside. The end 315u2 is close to the feed end 315v1 and couples with it, so that the antenna 315f can operate in the 2.4 GHz band.

[0513] Reference and combination Figure 117 , Figure 112 and Figure 115 As shown, in Embodiment 3, the antenna 315f can be disposed on the inner wall of the earphone rear shell 315a. Both the feed end 315u1 and the feed end 315v1 can be located on the inner surface of the peripheral sidewall 315i of the earphone rear shell 315a. Both the end end 315u2 and the end end 315v2 can be located on the inner surface of the bottom wall 315h of the earphone rear shell 315a, and the end end 315v2 can also be close to the peripheral sidewall 315i. Unlike Embodiment 1, for the first antenna stub 315u, from the feed end 315u1 to the end end 315u2, the second segment 315u4 of the first antenna stub 315u can extend approximately along the direction from the peripheral sidewall 315i to the bottom wall 315h. For the second antenna stub 315v, from the feed end 315v1 to the end end 315v2, the fourth segment 315v4 of the second antenna stub 315v can also extend approximately along the direction from the bottom wall 315h to the peripheral sidewall 315i.

[0514] This third embodiment provides another antenna topology 315f that can meet the antenna design requirements of the first earphone 31.

[0515] The above embodiments illustratively illustrate three topologies and three coupling methods for antenna 315f. The embodiments of this application are not actually limited to these; other topologies and coupling methods for antenna 315f can be designed according to product requirements. For example, from the feed end to the end end, the second segment can extend approximately along the direction from the bottom wall 315h to the peripheral sidewall 315i, and the fourth segment can extend approximately along the direction from the peripheral sidewall 315i to the bottom wall 315h. The feed end of the first antenna stub can be coupled to the end end of the second antenna stub to enable antenna 315f to operate in a set frequency band.

[0516] The above describes three schematic topologies of antenna 315f. It is understood that in this embodiment, the specific structure of antenna 315f can be designed according to product requirements and is not limited to those described above. For ease of description, the following descriptions of antenna 315f will use the antenna 315f in Embodiment 1 as an example.

[0517] First main microphone network 315g

[0518] The first main microphone mesh (315g) can be roughly circular in shape and may include several layers of material, such as acoustic mesh fabric and adhesive layers. Combined with... Figure 112 and Figure 115 As shown, the first main microphone mesh 315g can be fixedly connected to the bottom wall 315h of the earphone back shell 315a. For example, the adhesive layer in the first main microphone mesh 315g can be bonded to the bottom wall 315h. Furthermore, the first main microphone mesh 315g covers the pickup hole 315c, and the sound entering the pickup hole 315c can pass through the first main microphone mesh 315g and enter the inner cavity of the earphone back shell 315a.

[0519] Rear shell bracket 315d

[0520] like Figure 112 and Figure 119 As shown, the rear cover bracket 315d can be roughly in the shape of a cover. A through hole 315j can be opened on the rear cover bracket 315d.

[0521] Second main microphone network 315e

[0522] like Figure 112 As shown, the second main microphone mesh 315e can be roughly circular in shape, and may include several layers of material, such as acoustic mesh, foam, adhesive layers, etc. Combined with... Figure 112 and Figure 119 As shown, the second main microphone mesh 315e can be fixed to one side of the rear housing bracket 315d. For example, the adhesive layer in the second main microphone mesh 315e can be bonded to that side of the rear housing bracket 315d. Furthermore, the second main microphone mesh 315e covers the through hole 315j, allowing sound entering the through hole 315j to pass through the second main microphone mesh 315e.

[0523] Figure 120 for Figure 113 BB cross-sectional view of the headphone back shell assembly 315. Figure 120 This can represent the assembly structure of the headphone back shell assembly 315. For example... Figure 120 As shown, the first main microphone mesh 315g can be fixed to the inner surface of the bottom wall 315h of the earphone rear shell 315a. Combined with... Figure 120 and Figure 114 As shown, the first main microphone mesh 315g covers the pickup hole 315c (due to...). Figure 113The position of the cut surface in the middle, the pickup hole 315c failed to be in Figure 120 (As shown in the image). The rear shell bracket 315d is installed inside the earphone rear shell 315a. The rear shell bracket 315d has a certain distance from the bottom wall 315h and the first main microphone mesh 315g, thereby forming a windproof noise cavity 315k between the rear shell bracket 315d and the earphone rear shell 315a. The windproof noise through hole 315b communicates with the windproof noise cavity 315k.

[0524] like Figure 120 As shown, the second main microphone mesh 315e is located in the inner cavity of the earphone back shell 315a. The second main microphone mesh 315e can be fixed to the side of the back shell bracket 315d away from the bottom wall 315h, and the second main microphone mesh 315e covers the through hole 315j of the back shell bracket 315d.

[0525] The above text describes in detail the structure of the earbud 311, earbud support assembly 316, first electrode 312, earbud front shell assembly 313, second electrode 314 and earbud rear shell assembly 315 in the first earphone 31. The following text will describe the overall assembly structure of the above components.

[0526] Figure 121 This is a cross-sectional view of the first earphone 31. Due to the selection of the cross-sectional location, some structural elements are not shown. Figure 122 for Figure 121 A magnified view of a portion of point A in the middle.

[0527] like Figure 121 As shown, the first electrode 312 can mate with the second part 313b of the earphone front shell 313z. (This is followed by a seemingly unrelated sentence about combination / connection.) Figure 102 and Figure 87 As shown, the conductive part 312b of the first electrode 312 can pass through the through hole 313d on the second part 313b and extend into the inner cavity of the earphone front shell 313z.

[0528] like Figure 121 and Figure 122 As shown, the earbud holder 316b can mate with the first part 313a of the earphone front shell 313z. (Combination) Figure 122 and Figure 90 As shown, the second skirt 316w of the earbud holder 316b can be bonded to the mounting groove 313f of the first part 313a through the fixing area 316z of the front vent acoustic mesh 316a. The holder body 316u of the earbud holder 316b can extend into the inner cavity of the earphone front shell 313z. Furthermore, as... Figure 122 As shown, the front vent 316x on the earbud holder 316b can be close to the pickup channel 313e on the earphone front shell 313z, and the shielding area 316y of the front vent acoustic mesh 316a is located between the front vent 316x and the pickup channel 313e.

[0529] like Figure 122 As shown, the inner earpiece cover 311a can be fitted over the outer periphery of the earpiece support 316b. Wherein, combined with Figure 109 and Figure 122 As shown, the slot 311g of the earbud inner cover 311a can mate with the first skirt 316v of the earbud holder 316b. One end of the earbud inner cover 311a with the sound outlet hole 311d can have a certain distance from the speaker grille 316c on the earbud holder 316b. The second protrusion 311c on the earbud inner cover 311a can contact the second skirt 316w of the earbud holder 316b, thus creating a gap between the earbud inner cover 311a and the second skirt 316w, preventing the earbud inner cover 311a from blocking the front vent hole 316x near the second skirt 316w. It can be understood that the second protrusion 311c can be misaligned with the front vent hole 316x to avoid blocking it.

[0530] like Figure 122 As shown, the earbud outer cover 311b surrounds the outer periphery of the earbud inner cover 311a. The lower end of the earbud outer cover 311b can surround the outer periphery of the first part 313a of the headphone front shell 313z. The first protrusion 311f on the inner wall of the earbud outer cover 311b can also surround the outer periphery of the first part 313a. The design of the first protrusion 311f can increase the structural strength of the earbud outer cover 311b, so that when the first headphone 31 is worn by the user, the shaking or vibration of the earbud outer cover 311b is reduced, thereby reducing the "stethoscope effect".

[0531] like Figure 121 As shown, the second electrode 314 is connected to the third part 313c of the earphone front shell 313z and the earphone rear shell 315a.

[0532] In this embodiment, the earbud support assembly 316, the earphone front shell assembly 313, the second electrode 314, and the earphone rear shell assembly 315 can form the inner cavity of the first earphone 31, and the electronic component 317 is housed in the inner cavity.

[0533] In this embodiment, after the first earphone 31 is placed in the third receiving slot 231f, the first electrode 312 can contact the first charging spring 231e in the third receiving slot 231f, and the second electrode 314 can contact the second charging spring 231c, thereby enabling the host 2 to charge the first earphone 31. Since both the first electrode 312 and the second electrode 314 are 360-degree closed ring structures, when the first earphone 31 is placed in the third receiving slot 231f at any angle, the first electrode 312 can always contact the first charging spring 231e, and the second electrode 314 can always contact the second charging spring 231c, ensuring that the host 2 charges the first earphone 31. This structure of the first electrode 312 and the second electrode 314 allows the user to place the first earphone 31 into the third receiving slot 231f more freely, improving the user experience.

[0534] It is easy to understand that in other embodiments, one of the first electrode and the second electrode has a 360-degree closed ring structure, while the other is not 360-degree closed, but forms an open ring structure. This also ensures that the first earphone can be placed anywhere within a certain angle range while still being able to charge.

[0535] For example Figure 123 The first earphone 41 shown retains the 360-degree closed ring structure of the first electrode 411, but has two or more second electrodes 412, spaced apart from each other, and distributed on the same circumference. Each second electrode 412 can be an open ring structure. Alternatively, in another embodiment, the number of second electrodes 412 is single, and the second electrode 412 is an open ring structure with a notch, for example, its surrounding angle can be 120 degrees, 180 degrees, 270 degrees (but less than 360 degrees), etc.

[0536] Alternatively, in other embodiments, neither the first electrode nor the second electrode is a 360-degree closed loop; both are single open ring structures with notches. Alternatively, one of the first and second electrodes is a single open ring structure with a notch, and the other is at least two in number, spaced apart and distributed on the same circumference. Alternatively, both the first and second electrodes are at least two in number, spaced apart and distributed on the same circumference. The above designs also ensure that the first earphone can be placed anywhere within a certain angle range while still being able to charge.

[0537] In this embodiment, the electrical connection between the first electrode 312 and the first charging spring 231e, or the electrical connection between the second electrode 314 and the second charging spring 231c, can also be used to enable communication between the first earphone 31 and the host 2. That is, the first electrode 312 or the second electrode 314 can also be reused as the communication electrode of the first earphone 31 to enable communication between the first earphone 31 and the host 2.

[0538] Unlike this embodiment, in other embodiments, such as Figure 124 As shown, the first earphone 51 may have a first electrode 512 and a second electrode 512, which are dedicated to enabling the host to charge the first earphone 51. In addition, the first earphone 51 also has a communication electrode 513, which is dedicated to communication with the host. It is understood that... Figure 124 The first electrode 512, the second electrode 512, and the communication electrode 513 shown are all 360-degree closed ring structures; this is merely an example. In reality, the structure, quantity, and distribution of the first electrode 512, the second electrode 512, and the communication electrode 513 can all be designed according to product requirements.

[0539] Electronic Components 317

[0540] Figure 125 and Figure 126 This illustration shows a schematic structure of the electronic component 317 in this embodiment. It is understood that the structure of the electronic component 317 described below is merely an example and not a limitation of the embodiments of this application.

[0541] like Figure 125 and Figure 126 As shown, the electronic component 317 may include a first earphone circuit board assembly 317e, a second earphone circuit board assembly 317g, a third earphone circuit board assembly 317h, a flexible circuit board 317j, a speaker 317a, a wear detection electrode plate 317b, a secondary microphone 317k, an earphone battery 317f, and a main microphone 317i.

[0542] First earphone circuit board assembly 317e, second earphone circuit board assembly 317g and third earphone circuit board assembly 317h

[0543] The first earphone circuit board assembly 317e, the second earphone circuit board assembly 317g, and the third earphone circuit board assembly 317h are stacked sequentially and arranged at intervals, and the three can be electrically connected through a flexible circuit board 317j. Each of the first earphone circuit board assembly 317e, the second earphone circuit board assembly 317g, and the third earphone circuit board assembly 317h may include a circuit board and circuits and devices arranged on the circuit board.

[0544] For example, a wear detection sensor can be arranged on the circuit board of the first earphone circuit board assembly 317e to detect the wearing of the first earphone 31. The wear detection sensor may include at least one of a gravity sensor (G-sensor), an inertial measurement unit (IMU) sensor, a bone conduction sensor, an infrared radiation (IR) sensor, a voice accelerometer (VACC) sensor, or a voice pick-up unit (VPU). A magnetic field sensor may also be arranged on the circuit board of the first earphone circuit board assembly 317e to detect changes in the magnetic flux of the host magnet, thereby detecting the insertion / exit of the first earphone 31 (the principle of insertion / exit detection will be explained further below). This magnetic field sensor may be, for example, a Hall sensor or a magnetometer. There may be two such magnetic field sensors. For example, a charging circuit and a discharging circuit may be arranged on the circuit board of the second earphone circuit board assembly 317g. For example, an radio frequency circuit may be arranged on the circuit board of the third earphone circuit board assembly 317h.

[0545] Speaker 317a

[0546] like Figure 126 As shown, speaker 317a can be electrically connected to the circuit board of the first headphone circuit board assembly 317e. Speaker 317a can be located on the side of the first headphone circuit board assembly 317e away from the second headphone circuit board assembly 317g.

[0547] Wearing detection electrode 317b

[0548] like Figure 125 and Figure 126 As shown, the wear detection electrode 317b may include a connected electrode 317c and a connecting pin 317d. The connecting pin 317d extends from the electrode 317c and can be electrically connected (e.g., soldered) to the circuit board of the first earphone circuit board assembly 317e. The electrode 317c may be located on the same side of the first earphone circuit board assembly 317e as the speaker 317a. The wear detection electrode 317b is conductive and may be made of a metallic material. When the wear detection electrode 317b is close to the human body, it can generate a coupling capacitance. As the distance between the wear detection electrode 317b and the human body changes, the coupling capacitance value changes. By detecting and processing the coupling capacitance value of the wear detection electrode 317b, the wear detection of the first earphone 31 can be realized.

[0549] Secondary microphone 317k

[0550] like Figure 125 and Figure 126As shown, the secondary microphone 317k is located on the side of the first earphone circuit board assembly 317e away from the speaker 317a, and can be electrically connected to the circuit board of the first earphone circuit board assembly 317e. The secondary microphone 317k can be arranged on the circuit board of the first earphone circuit board assembly 317e. A through hole can be formed on the circuit board of the first earphone circuit board assembly 317e at a location corresponding to the secondary microphone 317k, allowing sound to be picked up by the secondary microphone 317k through the through hole. The secondary microphone 317k is used for noise reduction and can also be used for wear detection.

[0551] 317f headphone battery

[0552] like Figure 125 and Figure 126 As shown, the headphone battery 317f can be located between the first headphone circuit board assembly 317e and the second headphone circuit board assembly 317g. The electrode pins of the headphone battery 317f can be electrically connected to the circuit board in the first headphone circuit board assembly 317e.

[0553] Main microphone 317i

[0554] like Figure 125 and Figure 126 As shown, the main microphone 317i can be located between the second headphone circuit board assembly 317g and the third headphone circuit board assembly 317h, and can be electrically connected to the circuit board of the third headphone circuit board assembly 317h. The main microphone 317i can be arranged on the circuit board of the third headphone circuit board assembly 317h. A through hole can be opened on the circuit board of the third headphone circuit board assembly 317h at the position corresponding to the main microphone 317i, and human voice can be picked up by the main microphone 317i through the through hole.

[0555] Figure 127 This indicates the assembly structure of electronic component 317 with other components of the first earphone 31. Figure 128 for Figure 127 A magnified view of a portion of point A in the diagram. Figure 129 for Figure 127 A magnified view of a portion of point B in the middle.

[0556] like Figure 127 As shown, the electronic component 317 can be housed in the cavity formed by the earbud support assembly 316, the earphone front shell assembly 313, the second electrode 314, and the earphone rear shell assembly 315.

[0557] like Figure 128As shown, at least a portion of the speaker 317a can be located within the inner cavity of the earbud holder 316b. Sound waves emitted by the speaker 317a can be transmitted through the speaker grille 316c and the sound outlet 311d, and enter the ear canal. Due to the presence of the vent 316x, the air pressure within the inner cavity of the earbud holder 316b is balanced with the external air pressure, ensuring the speaker 317a functions properly. Furthermore, the vent 316x also enhances the noise reduction depth of the secondary microphone 317k.

[0558] like Figure 128 As shown schematically, the electrode 317c of the wear detection electrode 317b can be fixedly connected (e.g., welded) to the end of the earbud holder 316b away from the speaker mesh 316c. The wear detection electrode 317b and the earbud holder 316b can be connected to form a conductor with a large area. Therefore, both the wear detection electrode 317b and the earbud holder 316b can generate coupling capacitance, making both usable for wear detection. That is, in addition to its supporting and housing function, the earbud holder 316b can also be reused as a detection electrode for wear detection.

[0559] It is understandable that, depending on product requirements, the assembly structure of the wear detection plate and the earbud holder can take other forms, not limited to those described above. For example, if only a portion of the earbud holder is made of conductive material, the wear detection plate can be fixedly connected to that portion of the earbud holder. The assembly structure of the wear detection plate and the earbud holder can be designed based on their respective structures and the internal space of the first earphone.

[0560] In this embodiment, by using both the wear detection electrode 317b and the earbud holder 316b as the detection electrode for wear detection, the area of ​​the detection electrode can be increased, which helps to ensure the consistency and reliability of wear detection. Since the earbud holder 316b is closer to the inside of the ear canal than the wear detection electrode 317b, the capacitance detection data of the earbud holder 316b is more accurate and reliable, which helps to improve the overall reliability of wear detection. At the same time, reusing the earbud holder 316b as the detection electrode for wear detection does not affect the overall size of the first earphone 31 and can also save internal stacking space in the first earphone 31.

[0561] In addition, if the earbud bracket 316b is made of high-strength materials such as metal, the wall thickness and overall structural size of the earbud bracket 316b can be smaller, provided that the structural strength of the earbud bracket 316b meets the requirements. This allows the earbud cover 311b to have sufficient compression deformation space, which is beneficial to ensuring the user's wearing comfort.

[0562] In this embodiment, as an illustration, wear detection can be achieved by simultaneously using a wear detection sensor, a wear detection electrode plate 317b, and an earplug bracket 316b. This design can greatly increase the consistency and reliability of wear detection and reduce the probability of false detection.

[0563] Depending on the product requirements, in other embodiments, wear detection can also be achieved by using any one or any two of the wear detection sensor, wear detection electrode 317b, and earplug bracket 316b.

[0564] like Figure 128 As shown, the first earphone circuit board assembly 317e can be located within the earphone front shell 313z. Combined with... Figure 102 , Figure 87 and Figure 88 and Figure 128 As shown, the conductive portion 312b of the first electrode 312 can pass through the through hole 313d of the earphone front shell 313z and be electrically connected (e.g., soldered) to the circuit board of the first earphone circuit board assembly 317e so that the first electrode 312 can serve as a charging electrode.

[0565] like Figure 128 As shown, one side of the circuit board of the first earphone circuit board assembly 317e can be attached to the noise-canceling microphone mesh 313j. The secondary microphone 317k is located on the other side of the circuit board and corresponds to the noise-canceling microphone mesh 313j. Noise in the ear canal can sequentially pass through the speaker mesh 316c, the pickup channel 313e, the noise-canceling microphone mesh 313j, and the through-hole on the circuit board of the first earphone circuit board assembly 317e corresponding to the secondary microphone 317k, and be picked up by the secondary microphone 317k. The speaker 317a can generate an anti-phase signal opposite to the noise signal, which can cancel out the noise signal. Therefore, the first earphone 31 can achieve active noise cancellation.

[0566] When the first earphone 31 is working, the sound from the speaker 317a and noise inside the ear canal will pass through the acoustic mesh 316a of the front vent hole and leak to the outside through the front vent hole 316x. This can balance the pressure inside and outside the ear canal, thereby improving the user's wearing comfort. The acoustic mesh 316a that blocks the front vent hole 316x can also be removed. In this case, the front vent hole 316x can be made smaller, for example, the diameter of the front vent hole 316x is less than 0.22mm.

[0567] Additionally, the secondary microphone 317k can also be used for wear detection. The principle is as follows: the speaker 317a can emit sound wave signals of a specific frequency. If the first earphone 31 is not worn by the user, a large amount of this sound wave signal can leak to the outside through the vent 316x, resulting in a lower signal strength picked up by the secondary microphone 317k. If the first earphone 31 is worn by the user, because the vent 316x is partially or completely blocked, the secondary microphone 317k can pick up more of the sound wave signal, resulting in a higher signal strength. Therefore, by detecting the signal strength picked up by the secondary microphone 317k, it can be determined whether the first earphone 31 is worn by the user.

[0568] like Figure 129 As shown, the second earphone circuit board assembly 317g can be located inside the second electrode 314. Combined with... Figure 111 and Figure 129 As shown, the conductive portion 314c of the second electrode 314 can be electrically connected (e.g., soldered) to the circuit board of the second earphone circuit board assembly 317g, so that the second electrode 314 serves as a charging electrode.

[0569] like Figure 129 As shown, the third earphone circuit board assembly 317h can be supported on the rear shell bracket 315d. Combined with... Figure 129 and Figure 120 As shown, the side of the third headphone circuit board assembly 317h facing away from the main microphone 317i can be attached to the second main microphone mesh 315e. The main microphone 317i can correspond to the second main microphone mesh 315e. The sound emitted by the user can pass sequentially through the pickup hole 315c, the first main microphone mesh 315g, the through hole 315j on the rear shell bracket 315d, the second main microphone mesh 315e, and the through hole on the circuit board of the third headphone circuit board assembly 317h corresponding to the main microphone 317i, and be picked up by the main microphone 317i.

[0570] Combination Figure 129 and Figure 120 As shown, when the external airflow enters the wind noise chamber 315k through one wind noise vent 315b, it can also flow out of the wind noise chamber 315k through another wind noise vent 315b. This can reduce or prevent wind noise caused by the external airflow from being picked up by the main microphone 317i.

[0571] Combination Figure 116 and Figure 129 As shown, the feed terminals 315z1 and 315y1 of antenna 315f are both connected to a feed point on the circuit board of the third earphone circuit board assembly 317h, for example, by soldering. These two feed points can be symmetrical about the center line of the first earphone 31. Thus, antenna 315f can achieve both signal radiation and reception.

[0572] Features and functions of wearable device 1

[0573] In this embodiment, since the wearable device 1 includes the aforementioned host 2 and earphones, the wearable device 1 can possess the following characteristics and functions. Regarding certain characteristics or functions involving both the host 2 and the earphones, since the first earphone (e.g., first earphone 31, first earphone 41, first earphone 51) is completely identical to the second earphone, for the sake of brevity, the description will primarily focus on the first earphone 31 as an example.

[0574] 1. When the main unit 2 is turned on, the first earphone 31 is magnetically attached to the first part 21 of the main unit 2.

[0575] Combination Figure 1 and Figure 4 As shown, in this embodiment, when the host 2 is in a closed state, the first earphone 31 is housed in the space enclosed by the first receiving groove 213y of the first part 21 and the third receiving groove 231f of the second part 23.

[0576] Figure 130 The image, viewed from a side perspective, shows the positional relationship of the first host magnet 213r2 in the first part 21, the second host magnet 231v in the second part 23, and the earphone magnet 313g inside the first earphone 31 when the host 2 is in the closed state. Figure 130 As shown, the first host magnet 213r2 and the second host magnet 231v are both magnetically attracted to the earphone magnet 313g.

[0577] In this embodiment, the magnetic field of the first host magnet 213r2 is stronger, and the magnetic attraction between the first host magnet 213r2 and the earphone magnet 313g is greater; the magnetic field of the second host magnet 231v is weaker, and the magnetic attraction between the second host magnet 231v and the earphone magnet 313g is smaller. (Reference) Figures 1-4 As shown, when the host 2 is gradually opened from the closed state, since the magnetic attraction force of the first host magnet 213r2 is greater than that of the second host magnet 231v, the first earphone 31 will be attracted to the first part 21 and rotate with the first part 21 relative to the second part 23.

[0578] In this embodiment, in order to have a strong magnetic attraction between the first host magnet 213r2 and the earphone magnet 313g, a reasonable magnet design can be made.

[0579] like Figure 131As shown, in Embodiment 1 of this example, each first host magnet 213r2 is a Heilbeck array composed of two single magnets. The magnetic field directions of these two single magnets (indicated by an arrow pointing from N to S) are different, so that each first host magnet 213r2 has two magnetic field directions. Combined with... Figure 131 and Figure 130 As shown schematically, in each first host magnet 213r2, the magnetic field direction of one of the single magnets is approximately from the radially outer side to the radially inner side of the first earphone 31 (e.g., Figure 131 The magnetic field of the other single magnet (the upper middle magnet) is roughly directed from the radially inward side to the radially outward side of the first earphone 31 (e.g., the upper middle single magnet). Figure 131 (The single magnet in the lower middle part).

[0580] like Figure 131 As shown, each headphone magnet 313g can be a Heilbeck array formed from a single magnet, and different parts of each headphone magnet 313g can have different magnetic field directions. Combined with... Figure 131 and Figure 130 As illustrated, schematically, the magnetic field direction of a portion Q1 of each earphone magnet 313g generally points from the radially outer side to the radially inner side of the first earphone 31, while the magnetic field direction of the other portion Q2 generally points from the radially inner side to the radially outer side of the first earphone 31. The design of each earphone magnet 313g as a single magnet reduces the assembly difficulty of the earphone magnet 313g. In other embodiments, each earphone magnet 313g may also be composed of several (e.g., two) single magnets joined together.

[0581] The design of the first host magnet 213r2 and the earphone magnet 313g allows them to magnetically attract each other. Product verification has shown that this design results in a strong magnetic attraction between the first host magnet 213r2 and the earphone magnet 313g.

[0582] Unlike the first embodiment described above, as follows: Figure 132 As shown, in Embodiment 2 of this example, each first host magnet 213r2 is a Heilbeck array with four magnetic field directions. Each first host magnet 213r2 can be composed of four single magnets spliced ​​together, or a single magnet with four magnetic field directions. The magnet design of Embodiment 2 can meet the design requirement of the first earphone 31 being magnetically attracted to the first part 21.

[0583] Unlike the first embodiment described above, as follows: Figure 133As shown, in Embodiment 3 of this example, each first host magnet 213r2 is a single magnet with a single magnetic field direction. Schematic, the magnetic field direction of each first host magnet 213r2 generally points from the radially inward side to the radially outward side of the first earphone 31. Each earphone magnet 313g is a single magnet with a single magnetic field direction. Schematic, the magnetic field direction of each earphone magnet 313g generally points from the radially inward side to the radially outward side of the first earphone 31. The magnet design of Embodiment 3 satisfies the design requirement of the first earphone 31 magnetically adsorbing onto the first part 21.

[0584] Unlike the first embodiment described above, as follows: Figure 134 As shown, in Embodiment 4 of this example, each first host magnet 213r2 is a Heilbeck array with three magnetic field directions. Each first host magnet 213r2 can be composed of three single magnets spliced ​​together, or a single magnet with three magnetic field directions. Each earphone magnet 313g can have a single magnetic field direction. Furthermore, the first electrode 312 and the second electrode 314 can be made of materials that can be magnetically attracted by the first host magnet 213r2, such as magnetically conductive materials (e.g., common cold-rolled steel plate (SPCC), SUS430, etc.). Both the first electrode 312 and the second electrode 314 can be magnetically attracted to the first host magnet 213r2. The magnet design of Embodiment 4 not only meets the design requirement of the first earphone 31 being magnetically attracted to the first part 21, but also has a simple design structure, is easy to manufacture, and has low cost.

[0585] Alternatively, unlike the embodiments described above, in embodiment five, the first earphone 31 may not require a built-in earphone magnet. The first electrode 312 and the second electrode 314 may be made of materials that can be magnetically attracted by the first host magnet 213r2, such as magnetically conductive materials (e.g., SPCC, SUS430, etc.). Figure 135 As shown, both the first electrode 312 and the second electrode 314 can be magnetically attracted to the first host magnet 213r2. In this fifth embodiment, the first host magnet 213r2 can be flexibly designed as needed, and can have a single magnetic field direction or several magnetic field directions. The magnet design in this fifth embodiment not only meets the design requirement of the first earphone 31 being magnetically attracted to the first part 21, but also has a simple design structure, is easy to manufacture, and has low cost.

[0586] In this embodiment, as Figure 136 As shown, since the radial dimension of the first earphone 31 can be at least twice the depth of the first receiving groove 213y, most of the first earphone 31 will be exposed outside the first receiving groove 213y. This design allows the user to directly remove the first earphone 31 from the first part 21 after the main unit 2 is opened.

[0587] The above embodiments describe the magnet design of the first host magnet 213r2 and the earphone magnet 313g. In fact, the magnet design of the second host magnet 231v and the earphone magnet 313g can also be carried out with reference to the principle described above, as long as the magnetic field strength of the second host magnet 231v is less than the magnetic field strength of the first host magnet 213r2.

[0588] As described above, it can be understood that, depending on product requirements, in other embodiments, the magnetic field strength of the first host magnet 213r2 can also be less than the magnetic field strength of the second host magnet 231v, so that when the host 2 is opened, the first earphone 31 is not attracted by the first part 21, but remains stored in the second part 23. Alternatively, the first part of the host may not have a first receiving slot, and the first earphone can be attracted to the first part when the host is opened.

[0589] Second, when the first earphone 31 is placed on the first part 21, the first earphone 31 can automatically return to its original position.

[0590] like Figure 137 , Figure 138 and Figure 139 As shown, after the host 2 is opened and the first earphone 31 is removed from the host 2, the user can pick up the first earphone 31 and position it in a posture that roughly matches the first receiving slot 213y (meaning the earbud 311 of the first earphone 31 is roughly facing the end of the first receiving slot 213y used to receive the earbud 311, and the earphone back shell assembly 315 of the first earphone 31 is roughly facing the end of the first receiving slot 213y used to receive the earphone back shell assembly 315; the first earphone 31 can rotate around its center line at any angle), and then bring the first earphone 31 close to the first receiving slot 213y. Under the magnetic attraction of the first host magnet 213r2 in the first part 21 to the earphone magnet 313g in the first earphone 31, the first earphone 31 will be corrected to a posture that matches the first receiving slot 213y and will be automatically attracted into the first receiving slot 213y, so that the first earphone 31 can be accurately and properly placed into the first receiving slot 213y.

[0591] The automatic positioning design in this embodiment allows users to easily place the first earphone 31 into the host 2 without precise alignment, thereby improving the user experience.

[0592] Third, the first earphone 31 is placed inside the second part 23, and the first earphone 31 is not easily separated from the second part 23.

[0593] If the user places the first earphone 31 into the third receiving slot 231f of the second part 23, the first earphone 31 will be attracted into the third receiving slot 231f by the magnetic attraction force of the second host magnet 231v in the second part 23 on the earphone magnet 313g in the first earphone 31. Even if the host 2 is flipped, the first earphone 31 will not detach from the third receiving slot 231f.

[0594] In addition, the second charging spring 231c and the first charging spring 231e in the third receiving groove 231f can both apply a certain squeezing force to the first earphone 31. This squeezing force can increase the friction between the first earphone 31 and the second main body shell 231 in the second part 23, making it more difficult for the first earphone 31 to detach from the third receiving groove 231f.

[0595] IV. The first earphone 31 can be placed into the receiving slot at a relatively arbitrary angle.

[0596] In this embodiment, the first earphone 31 can overlap with itself after rotating a certain angle around its own center line. Therefore, the rotated first earphone 31 can always be accurately housed in the first receiving groove 213y or the third receiving groove 231f and fit with the inner wall of the first receiving groove 213y or the third receiving groove 231f. This allows the user to put the first earphone 31 into the first receiving groove 213y or the third receiving groove 231f without holding it at a fixed angle.

[0597] For example, for a first earphone 31 that is approximately octahedral, the first earphone 31 can overlap with itself after rotating 90° around its own center line. Even if the user rotates the first earphone 31 by 90°, 180°, or 270°, the first earphone 31 can still fit into the inner wall of the first receiving groove 213y or the third receiving groove 231f. Therefore, the first earphone 31 can be smoothly and accurately placed into the first receiving groove 213y or the third receiving groove 231f. (See also...) Figures 137-139 As shown, when the first earphone 31 is placed into the first receiving slot 213y, since the magnetic force of the first host magnet 213r2 has an angle correction function, even if the user rotates the first earphone 31 at will (for example, rotated by 10°, 35°, 55°, etc.), the magnetic force of the first host magnet 213r2 can correct the angle of the first earphone 31 to the normal angle, so that the first earphone 31 can be smoothly and accurately placed into the first receiving slot 213y and adapted to the inner wall of the first receiving slot 213y.

[0598] For example, the first earphone 31, which is roughly cylindrical, can be rotated around its own center line at any angle and still coincide with itself. Therefore, even if the user rotates the first earphone 31 at any angle, the first earphone 31 can still fit into the inner wall of the first or third receiving slot, so the first earphone 31 can be smoothly and accurately placed into the first or third receiving slot.

[0599] V. Detection of the opening / closing status of host 2

[0600] like Figure 140 As shown, the first part 21 of the host 2 has a magnetic field sensor 212g (which may be referred to as the first magnetic field sensor), which can be arranged, for example, on a circuit board 212a in the first part 21. The magnetic field sensor 212g is used to detect the magnetic flux of the state detection magnet 231x in the second part 23 of the host 2. The magnetic flux of the state detection magnet 231x detected by the magnetic field sensor 212g is proportional to the distance between the magnetic field sensor 212g and the state detection magnet 231x. The magnetic flux detected by the magnetic field sensor 212g is the largest when the host 2 is in the closed state; the magnetic flux detected by the magnetic field sensor 212g is the smallest when the host 2 is fully open.

[0601] In this embodiment, the magnetic field sensor 212g can be, for example, a Hall sensor or a magnetometer. The Hall sensor detects changes in magnetic flux. When the Hall sensor detects that the magnetic flux exceeds its hardware threshold, it generates a corresponding signal and reports it to the processor of host 2. The processor of host 2 can then perform appropriate processing based on this signal from the Hall sensor. Unlike the Hall sensor, the magnetometer detects the magnitude of the magnetic flux and reports it to the processor of host 2. The processor of host 2 can determine whether the magnetic flux detected by the magnetometer exceeds a built-in software threshold and perform appropriate processing based on the determination result. The following explanation will use a Hall sensor as an example.

[0602] refer to Figure 140 As shown, when the user presses keycap 251, the host 2 gradually opens from a closed state. The distance between the magnetic field sensor 212g and the state detection magnet 231x gradually increases, and the magnetic flux detected by the magnetic field sensor 212g and the state detection magnet 231x tends to decrease. When the magnetic flux detected by the magnetic field sensor 212g is less than a first threshold value, a first signal can be generated. The processor of the host 2 determines that the host 2 is in an open state based on this first signal.

[0603] Conversely, as the host 2 gradually closes from the open state, the distance between the magnetic field sensor 212g and the state detection magnet 231x gradually decreases, and the magnetic flux detected by the magnetic field sensor 212g to the state detection magnet 231x tends to increase. When the magnetic flux detected by the magnetic field sensor 212g exceeds the second threshold value, a second signal can be generated. The processor of the host 2 determines that the host 2 is in the closed state based on this second signal.

[0604] In this embodiment, when the processor of host 2 confirms that host 2 is in the open state, the processor will control the display screen 211 to display the corresponding interface.

[0605] In this embodiment, when it is confirmed that the host 2 is in the open state and the first earphone 31 is in the third receiving slot 231f (the method for detecting whether the first earphone 31 is in the third receiving slot 231f will be described below), the communication electrode of the host 2 can send a signal to the communication electrode of the first earphone 31 to wake up the first earphone 31. When it is confirmed that the host 2 is in the closed state and the first earphone 31 is inside the host 2, the host 2 can activate foreign object detection, and after confirming that no foreign object has entered, it can start charging the first earphone 31. In other embodiments, the positions of the magnetic field sensor 212g and the state detection magnet 231x can be interchanged, that is, the magnetic field sensor 212g can be in the second part 23, and the state detection magnet 231x can be in the first part 21.

[0606] VI. First Earphone 31 In / Out Case Status Detection

[0607] The entry / exit state of the first earphone 31 refers to the relative positional relationship between the first earphone 31 and the first receiving slot 213y, and the relative positional relationship between the first earphone 31 and the third receiving slot 231f, including: the first earphone 31 is inside the first receiving slot 213y and inside the third receiving slot 231f (the host 2 is closed and the first earphone 31 is inside the host 2), the first earphone 31 is inside the first receiving slot 213y and outside the third receiving slot 231f (the host 2 is open and the first earphone 31 is attached to the first part 21), and the first earphone 31 is inside the third receiving slot 231f and outside the first receiving slot 213y (the host 2 is open and the first earphone 31 is attached to the second part 23), etc.

[0608] In this embodiment, both the host 2 and the first earphone 31 can detect the insertion and removal status of the first earphone 31. These will be described in detail below.

[0609] 1. Host 2 detects the entry / exit status of the first earphone 31.

[0610] like Figure 141As shown, the second part 23 of the host 2 has a magnetic field sensor 237 and a magnetic field sensor 238 (both can be referred to as second magnetic field sensors, as shown in the dashed box). The magnetic field sensor 237 can be close to the outer surface of the wall of the third receiving groove 231f, and the magnetic field sensor 238 can be close to the outer surface of the wall of the fourth receiving groove 231g. The magnetic field sensor 237 and the magnetic field sensor 238 can both be, for example, single-axis Hall sensors or magnetometers. The following description takes the example that both the magnetic field sensor 237 and the magnetic field sensor 238 are Hall sensors.

[0611] The magnetic field sensor 237 is used to detect changes in the magnetic flux of the earphone magnet 313g in the first earphone 31. The magnetic flux of the earphone magnet 313g detected by the magnetic field sensor 237 is proportional to the distance between the magnetic field sensor 237 and the earphone magnet 313g. When the first earphone 31 is located in the third receiving groove 231f (which may be when the main unit 2 is closed and the first earphone 31 is inside the main unit 2, or when the main unit 2 is open and the first earphone 31 is attracted to the second part 23), the magnetic flux detected by the magnetic field sensor 237 is larger; when the first earphone 31 leaves the third receiving groove 231f and is attracted to the first part 21, the magnetic flux detected by the magnetic field sensor 237 is smaller.

[0612] In this embodiment, when the magnetic flux detected by the magnetic field sensor 237 is greater than or equal to the third threshold, a third signal can be generated. The processor of the host 2 determines that the first earphone 31 is located in the third receiving slot 231f based on the third signal.

[0613] In this embodiment, the processor of the host 2 can determine the entry / exit status of the first earphone 31 by combining the third signal sent by the magnetic field sensor 237 and the first or second signal sent by the magnetic field sensor 212g. For example, when the processor receives the third signal and the first signal, the processor determines that the host 2 is open and the first earphone 31 is attached to the second part 23. When the processor receives the third signal and the second signal, the processor determines that the host 2 is closed and the first earphone 31 is inside the host 2.

[0614] When the magnetic flux detected by the magnetic field sensor 237 is less than the third threshold but greater than or equal to the fourth threshold, a fourth signal can be generated. The processor of the host 2 determines, based on this fourth signal, that the first earphone 31 has left the third receiving slot 231f and is adsorbed onto the first part 21 (e.g., ...). Figure 141 (As shown).

[0615] Similarly, magnetic field sensor 238 is used to detect changes in the magnetic flux of the earphone magnet in the second earphone 32. As mentioned above, the host 2 can determine the insertion / exit status of the second earphone 32 by the signal sent by magnetic field sensor 238, or by combining the signals sent by magnetic field sensor 238 and magnetic field sensor 212g.

[0616] In summary, it is easy to understand that the magnetic field sensor 237 located in the second part 23 is used to determine whether the first earphone 31 is inside or outside the third receiving slot 231f. Similarly, the magnetic field sensor 238 located in the second part 23 is used to detect whether the second earphone 32 is inside or outside the fourth receiving slot 231g.

[0617] In other embodiments, at least one of the magnetic field sensor 237 and magnetic field sensor 238 may also be located within the first portion 21 of the host 2. For example, magnetic field sensor 237 may be located within the first portion 21 (e.g., near the outer surface of the groove wall of the first receiving groove 213y). The change in magnetic flux of the earphone magnet 313g in the first earphone 31 can be detected by magnetic field sensor 237 to determine whether the first earphone 31 is inside or outside the first receiving groove 213y. The specific principle is the same as described above and will not be repeated here.

[0618] In this embodiment, when the host 2 confirms that the first earphone 31 is in the third receiving slot 231f and the host 2 is in the open state, the communication electrode of the host 2 can send a signal to the communication electrode of the first earphone 31 to wake up the first earphone 31. The host 2 can also charge the first earphone 31 through the first charging spring 231e and the second charging spring 231c. In addition, the host 2 can also activate the charging overheat protection mechanism (described below). Depending on the product requirements, it is also possible to not charge the first earphone 31 and not activate the charging overheat protection mechanism.

[0619] In this embodiment, when the host 2 confirms that the first earphone 31 is inside the host 2 and the host 2 is in a closed state, the host 2 can activate the foreign object detection mechanism (described below), charge the first earphone 31, and activate the charging overheat protection mechanism. Depending on the product requirements, it is also possible to not charge the first earphone 31 and not activate the charging overheat protection mechanism.

[0620] In other embodiments, when the host 2 confirms that the first earphone 31 is in the first receiving slot 213y and the host 2 is in the open state, the first earphone 31 will be woken up (the principle will be explained below).

[0621] 2. The first earphone 31 detects the entry and exit status of the first earphone 31.

[0622] like Figure 142As shown, the first earphone 31 may have a magnetic field sensor 317z (which may be referred to as the third magnetic field sensor, as indicated by the dashed box). The magnetic field sensor 317z may be arranged on the circuit board of the third earphone circuit board assembly 317h, for example. The magnetic field sensor 317z may be, for example, a Hall sensor or a magnetometer. The following description uses the example of the magnetic field sensor 317z being a Hall sensor.

[0623] The magnetic field sensor 317z is used to detect changes in the magnetic flux of the state detection magnet 231x in the second part 23 of the host 2. The magnetic flux detected by the magnetic field sensor 317z is proportional to the distance between the magnetic field sensor 317z and the state detection magnet 231x. When the first earphone 31 is located in the third receiving slot 231f (either the host 2 is closed and the first earphone 31 is inside the host 2, or the host 2 is open and the first earphone 31 is attracted to the second part 23), the magnetic flux detected by the magnetic field sensor 317z is larger; when the first earphone 31 leaves the third receiving slot 231f and is attracted to the first part 21, the magnetic flux detected by the magnetic field sensor 317z is smaller.

[0624] In this embodiment, when the magnetic flux detected by the magnetic field sensor 317z is greater than or equal to the fifth threshold, a sixth signal can be generated. The controller of the first earphone 31 determines that the first earphone 31 is located in the third receiving slot 231f based on the sixth signal.

[0625] In this embodiment, the controller of the first earphone 31 (which may be a central processing unit or a microcontroller unit (MCU)) can determine the entry / exit status of the first earphone 31 by combining the sixth signal sent by the magnetic field sensor 317z and the first or second signal sent by the magnetic field sensor 212g (the first and second signals can be transmitted through the communication electrodes of the host 2 and the communication electrodes of the first earphone 31). For example, when the controller receives the sixth signal and the first signal, the controller determines that the host 2 is open and the first earphone 31 is attached to the second part 23. When the controller receives the sixth signal and the second signal, the controller determines that the host 2 is closed and the first earphone 31 is inside the host 2.

[0626] When the magnetic flux detected by the magnetic field sensor 317z is less than the fifth threshold but greater than or equal to the sixth threshold, a seventh signal can be generated. The controller of the first earphone 31 determines, based on the seventh signal, that the first earphone 31 leaves the third receiving slot 231f and is attracted to the first part 21.

[0627] like Figure 142As shown, the second earphone 32 can also have a magnetic field sensor 327z (indicated by a dashed box), which is used to detect changes in the magnetic flux of the state detection magnet 231w in the second part 23. The magnetic field sensor 327z can be, for example, a single-axis Hall sensor. As described above, the second earphone 32 can determine its insertion / exit status by the signal sent by the magnetic field sensor 327z, or by combining the signals sent by the magnetic field sensor 327z and the magnetic field sensor 212g.

[0628] In this embodiment, the first earphone 31 detects its own insertion / exit status in the charging case, which enables the first earphone 31 to perform corresponding operations:

[0629] If the host 2 is in a closed state and the first earphone 31 detects that it is located in the third receiving slot 231f, the first earphone 31 can be in a sleep state.

[0630] If the host 2 is in the open state and the first earphone 31 detects that it is located in the third receiving slot 231f, the first earphone 31 can be woken up by the host 2. For example, the communication electrode of the host 2 can send a signal to the communication electrode of the first earphone 31 to wake up the first earphone 31.

[0631] If the host 2 is in the open state and the first earphone 31 detects that it is attached to the first part 21, the detection signal of the magnetic field sensor 317z will trigger the controller of the first earphone 31 to work and wake up the first earphone 31.

[0632] In this embodiment, both the host 2 and the first earphone 31 can detect the entry and exit status of the first earphone 31, which can avoid the risks that may be caused by relying solely on the host 2 or the first earphone 31 for detection (for example, if relying solely on the host 2 for detection, if the host 2 runs out of power, it will not be able to accurately detect the entry and exit status of the first earphone 31), thus ensuring the reliability of the entry and exit status detection of the first earphone 31.

[0633] VII. Foreign Object Detection Mechanism

[0634] In this embodiment, if foreign objects (such as liquids or solid and semi-solid contaminants) enter the third receiving slot 231f of the host 2, it may cause dirt, corrosion, and rust on the surfaces of the host 2 and the first earphone 31, and may even lead to functional abnormalities, affecting product reliability and lifespan. In particular, if the second charging spring 231c and the first charging spring 231e in the third receiving slot 231f come into extensive contact with foreign objects, it may lead to charging abnormalities (or communication abnormalities).

[0635] In view of this, such as Figure 143 As shown, the third receiving slot 231f is also equipped with a foreign object detection spring 231d for foreign object detection. The detection principle is as follows:

[0636] When the foreign object detection spring 231d, and at least one of the first charging spring 231e and the second charging spring 231c comes into contact with a foreign object, the waveform of the charging signal of the host 2 will change. For example, after the foreign object detection spring 231d comes into contact with the first charging spring 231e, or after the foreign object detection spring 231d comes into contact with the second charging spring 231c, or after all three of them come into contact with the foreign object, the waveform of the charging signal of the host 2's charging circuit will change. This waveform-changing charging signal can be called an abnormal charging signal. If only at least one of the first charging spring 231e and the second charging spring 231c comes into contact with the foreign object, the waveform of the host 2's charging signal will not change. This waveform-unchanged charging signal can be called a normal charging signal.

[0637] If only one of the three charging contacts 231e, 231c and 231d comes into contact with a foreign object, or if none of the three come into contact with a foreign object, the waveform of the charging signal of the host 2 will not change, that is, the charging circuit generates a normal charging signal.

[0638] Therefore, the processor of host 2 can determine whether a foreign object has entered the third receiving slot 231f based on the type of the charging signal. For example, when the charging signal is determined to be an abnormal charging signal, the processor determines that a foreign object has entered the third receiving slot 231f; conversely, when the charging signal is determined to be a normal charging signal, the processor determines that no foreign object has entered the third receiving slot 231f.

[0639] In this embodiment, when the host 2 confirms that a foreign object has entered the third receiving slot 231f, the processor of the host 2 can control the charging circuit in the host 2 to shut down. Therefore, when the first earphone 31 is housed in the third receiving slot 231f, there is no charging current between the first charging spring 231e and the first electrode of the first earphone 31, and no charging current between the second charging spring 231c and the second electrode of the first earphone 31, thus preventing charging abnormalities (e.g., short circuits).

[0640] In this embodiment, when the host 2 confirms that a foreign object has entered the third receiving slot 231f, the processor of the host 2 can also control the alarm module in the host 2 to issue an alarm to warn the user. This alarm module can be, for example, a speaker, buzzer, motor, etc., in the host 2. It is understood that, depending on product requirements, an alarm mechanism is not always necessary.

[0641] In this embodiment, when the host 2 confirms that no foreign object has entered the third receiving slot 231f, the processor of the host 2 can control the charging circuit in the host 2 to turn on. Therefore, when the first earphone 31 is housed in the third receiving slot 231f, the host 2 will charge the first earphone 31 normally.

[0642] In other embodiments, the host may not have this foreign object detection mechanism, depending on the product requirements.

[0643] 8. The main unit 2 charges the first earphone 31.

[0644] As described above, due to the structural design of the first and second electrodes in the first earphone 31, the first charging spring 231e can contact the first electrode 312 and the second charging spring 231c can contact the second electrode 314 in all cases when the first earphone 31 is placed into the third receiving slot 231f at various rotation angles, thus ensuring that the host 2 can charge the first earphone 31 normally. This design simplifies user operation and improves the user experience.

[0645] IX. Overheat protection mechanism for main unit 2 during charging

[0646] In this embodiment, the host 2 generates heat when charging the first earphone 31, which may cause the host 2 or the first earphone 31 to overheat. For example, improper user operation or internal circuit short circuit may cause the charging current of the host 2 to be too large, which can easily lead to excessive temperature rise. Excessive temperature will affect the safety, lifespan and reliability of the product, and may also reduce the user experience.

[0647] In view of this, the host 2 may have a temperature detection module, which may be located, for example, near the first receiving slot 213y and / or the third receiving slot 231f. This temperature detection module may be, for example, a thermistor. The temperature detection module detects the temperature at its mounting location and reports it to the processor of the host 2. The processor can determine whether the temperature rise exceeds a threshold based on the detection information from the temperature detection module. When the temperature rise is greater than or equal to the threshold, the processor can control the charging circuit of the host 2 to shut down, preventing the host 2 from charging the first earphone 31, thereby suppressing the temperature rise. If the temperature rise is less than the threshold, the processor can control the charging circuit of the host 2 to open, allowing the host 2 to charge the first earphone 31. This overheat protection mechanism improves the product's safety, lifespan, and reliability, ensuring a better user experience.

[0648] In this embodiment, when the processor of host 2 confirms that the temperature rise is too high, the processor can also control the alarm module in host 2 to issue an alarm to warn the user. This alarm module can be, for example, a speaker, buzzer, motor, etc., in host 2. It is understood that, depending on product requirements, an alarm mechanism is not always necessary.

[0649] In other embodiments, the host may not have this overheat protection mechanism, depending on the product requirements.

[0650] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An earphone, characterized in that, The headphones have a centrally symmetrical shape; The earphone includes an earphone front shell, an earphone magnet, a first electrode, and a second electrode; the earphone magnet is a ring-shaped structure surrounding the center line of the earphone, and the earphone magnet is fixed to the inner wall of the earphone front shell; the first electrode and the second electrode are both located on the outside of the earphone, and are both ring-shaped structures surrounding the center line of the earphone, and the first electrode and the second electrode are respectively fixed to opposite ends of the earphone front shell; The headphones also include a first headphone circuit board assembly, an earbud holder, a speaker, and a secondary microphone; The earphone front shell has a sound pickup channel; the first earphone circuit board assembly is installed inside the earphone front shell; the first electrode is electrically connected to the circuit board in the first earphone circuit board assembly; The earbud holder has a hollow cylindrical structure, and one end of the earbud holder has a through hole; the end of the earbud holder facing away from the through hole is fixed to the front shell of the earphone, and the through hole, the inner cavity of the earbud holder and the pickup channel are connected in sequence, and the through hole, the speaker, the first earphone circuit board assembly and the secondary microphone are arranged in sequence along the center line of the earphone; At least a portion of the speaker is located within the inner cavity of the earbud holder, the speaker is electrically connected to the circuit board in the first headphone circuit board assembly, and the sound wave signal emitted by the speaker can be propagated to the outside of the headphone through the through hole of the earbud holder; The secondary microphone is arranged on the side of the circuit board facing away from the speaker in the first earphone circuit board assembly, and the secondary microphone corresponds to the pickup channel; the secondary microphone is used to pick up noise signals that enter the inner cavity of the earphone holder and the pickup channel through the through hole of the earphone holder; the speaker is used to generate a reverse signal with the opposite phase to the noise signal to achieve active noise cancellation.

2. The earphone according to claim 1, characterized in that, The first electrode is either a closed ring structure or an open ring structure.

3. The headphones according to claim 1 or 2, characterized in that, The first electrode has an open ring structure, and there are at least two first electrodes. The at least two first electrodes are arranged in pairs at intervals and distributed on the same circumference.

4. The headphones according to any one of claims 1-3, characterized in that, The earphone front shell has a through hole; the first electrode includes a connected electrode body and a conductive part, the conductive part of the first electrode is disposed on the inner surface of the electrode body of the first electrode; the electrode body of the first electrode is fixed to the outer surface of one end of the earphone front shell; the conductive part of the first electrode passes through the through hole of the earphone front shell and is electrically connected to the circuit board in the first earphone circuit board assembly inside the earphone front shell.

5. The headphones according to any one of claims 1-4, characterized in that, The earphones include an earphone back shell and a second earphone circuit board assembly; The second electrode includes a connected electrode body and a conductive portion, the conductive portion of the second electrode being disposed on the inner surface of the electrode body of the second electrode; the electrode body of the second electrode connects the earphone back shell and the earphone front shell, the second earphone circuit board assembly is located within the space enclosed by the electrode body of the second electrode and the earphone back shell; the conductive portion of the second electrode is electrically connected to the circuit board in the second earphone circuit board assembly.

6. The headphones according to any one of claims 1-5, characterized in that, The earphone magnet is a single magnet with a closed loop structure; or, the earphone magnet is at least two magnets, which are spaced apart, and each earphone magnet has an open loop structure.

7. The headphones according to any one of claims 1-6, characterized in that, The earbud holder has a front vent hole in its wall, which connects the inner and outer spaces of the earbud holder. The earphones include a front vent acoustic mesh. The acoustic mesh fabric of the front vent hole includes a fixed area and a shielding area. The shielding area is connected to one side of the fixed area. The fixed area is bonded to one end of the earbud holder facing away from the through hole of the earbud holder and the front shell of the earphone. The shielding area is bonded to the inner wall of the earbud holder and shields the front vent hole. The shielding area allows sound wave signals to pass through.

8. The headphones according to any one of claims 1-7, characterized in that, The speaker is also used to emit sound wave signals of a specific frequency, and the secondary microphone is also used to pick up the sound wave signals of the specific frequency. The earphones include a controller for determining whether the earphones are being worn based on the signal strength of the sound wave signal at a specific frequency picked up by the secondary microphone.

9. The headphones according to any one of claims 1-8, characterized in that, The earphone includes a wear detection electrode plate; The earplug support is made of conductive material; The wear detection electrode is located inside the front shell of the earphone. The wear detection electrode is connected to one end of the earbud bracket near the front shell of the earphone and is electrically connected to the circuit board in the first earphone circuit board assembly. Both the wear detection electrode and the earbud bracket are used to generate coupling capacitance when close to the human body. The earphones include a controller for determining whether the earphones are being worn based on the value of the coupling capacitor.

10. The headphones according to any one of claims 1-9, characterized in that, Wear detection sensors are arranged on the circuit board of the first earphone circuit board assembly; The earphones include a controller for determining whether the earphones are being worn based on a detection signal from the wear detection sensor.

11. The headphones according to any one of claims 1-10, characterized in that, The earphone includes an earbud; the earbud includes a connected inner earbud cover and an outer earbud cover, the inner earbud cover is fitted around the outer periphery of the earbud bracket, and the outer earbud cover surrounds the outer periphery of the inner earbud cover; the surface of the outer earbud cover facing the inner earbud cover is provided with a first protrusion; the first electrode is located between the earbud and the second electrode.

12. The headphones according to any one of claims 1-11, characterized in that, The earbud holder has a front vent hole in its wall, which connects the inner and outer spaces of the earbud holder. The outer periphery of the earbud holder forms a skirt, and the front vent hole is adjacent to the skirt; The earphone includes an earbud, which includes a connected outer earbud cover and an inner earbud cover; the inner earbud cover is fitted around the outer periphery of the earbud bracket, and the skirt protrudes outside the inner earbud cover; a second protrusion is provided on the surface of the inner earbud cover facing the skirt, and the second protrusion contacts the skirt; the outer earbud cover surrounds the outer periphery of the inner earbud cover. The first electrode is located between the earplug and the second electrode.

13. The headphones according to any one of claims 1-12, characterized in that, The earphone includes an earphone back shell, a third earphone circuit board assembly, and a main microphone; The rear shell has a sound pickup hole and at least two wind noise reduction holes, and the sound pickup hole and each of the wind noise reduction holes are connected to the inner and outer spaces of the rear shell; the third earphone circuit board assembly is located inside the earphone rear shell; the second electrode connects the earphone rear shell and the earphone front shell; The main microphone is arranged on the circuit board of the third earphone circuit board assembly; the main microphone is used to pick up sound wave signals that enter the rear shell through the sound pickup hole.

14. An assembly fixture, characterized in that, Applied to the headphones according to any one of claims 1-13, the headphones include a front shell and at least two headphone magnets. The assembly fixture includes a base, a fixture magnet, and a top cover; The base has a workpiece positioning groove and a fixture magnet mounting groove; the workpiece positioning groove is used to accommodate the earphone front shell; the number of fixture magnet mounting grooves is the same as the number of earphone magnets, and all the fixture magnet mounting grooves are distributed at intervals on the outside of the workpiece positioning groove and are all connected to the workpiece positioning groove. The number of fixture magnets is the same as the number of earphone magnets, and one fixture magnet is installed in one fixture magnet mounting slot. The upper cover includes a cover plate and an upper cover limiting post; the cover plate has magnet placement through holes, the number of which is the same as the number of earphone magnets, and the axis of each magnet placement through hole is along the thickness direction of the cover plate; the upper cover limiting post is connected to one side of the cover plate in the thickness direction, and the upper cover limiting post has a limiting portion, the number of which is the same as the number of earphone magnets, and the projection of one limiting portion in the axial direction of the magnet placement through hole corresponds to one magnet placement through hole; The upper cover is detachably connected to the base, wherein the cover plate contacts the base, the projections of different areas of the workpiece positioning groove onto the axial direction of the magnet placement through hole fall into each of the magnet placement through holes, the upper cover limiting post extends into the workpiece positioning groove, and each limiting part is spaced apart from the side wall of the workpiece positioning groove; each limiting part is used to form a gap with the inner wall of the earphone front shell positioned in the workpiece positioning groove. Each of the magnet placement through holes is used to allow one of the earphone magnets to be placed into the assembly fixture, each of the gaps is used to allow one of the earphone magnets entering the assembly fixture to be placed into the earphone front shell, and each fixture magnet is used to magnetically attract one earphone magnet placed in the earphone front shell.

15. The assembly fixture according to claim 14, characterized in that, All of the aforementioned fixture magnet mounting slots are evenly distributed at equal intervals on the outside of the workpiece positioning slot.

16. The assembly fixture according to claim 14 or 15, characterized in that, The base is provided with a top cover positioning hole, and the top cover includes a top cover positioning post connected to the cover plate. The top cover positioning post and the top cover limiting post are located on the same side of the cover plate. When the top cover is detachably connected to the base, the top cover positioning post is inserted into the top cover positioning hole.

17. The assembly fixture according to any one of claims 14-16, characterized in that, The base has a base magnet, and the upper cover includes an upper cover magnet fixed to the cover plate; when the upper cover and the base are detachably connected, the upper cover magnet and the base magnet are magnetically attracted to each other.

18. The assembly fixture according to any one of claims 14-16, characterized in that, The base is provided with a clamp receiving groove, which is connected to the workpiece positioning groove; The assembly fixture includes a clamp, a portion of which is used to hold the earphone front shell; When the top cover and the base are detachably connected, a part of the clamp and the earphone front shell held by the clamp are both housed in the workpiece positioning groove, and another part of the clamp is housed in the clamp receiving groove.

19. A method for manufacturing headphones, characterized in that, Using the assembly fixture according to any one of claims 14-18, at least two earphone magnets are assembled inside the earphone front shell of the earphone according to any one of claims 1-13; the manufacturing method includes: Position the earphone front shell into the workpiece positioning groove of the assembly fixture; The upper cover of the assembly fixture is installed onto the base, such that the cover plate contacts the base, and the projections of different areas of the earphone front shell onto each of the magnet placement through holes fall into each of the magnet placement through holes, so that the upper cover limiting post extends into the earphone front shell, and each of the limiting parts forms a gap with the inner wall of the earphone front shell. All the earphone magnets are installed into the earphone front shell. One earphone magnet is installed into the corresponding position in the earphone front shell through a magnet placement through hole and a gap corresponding to the magnet placement through hole. One jig magnet attracts the earphone magnet corresponding to the jig magnet to the inner wall of the earphone front shell. Remove the top cover from the base; Each of the earphone magnets is fixedly connected to the inner wall of the earphone front shell; Remove the earphone front shell containing the earphone magnet from the base.

20. The manufacturing method according to claim 19, characterized in that, The step of fixing each of the earphone magnets to the inner wall of the earphone front shell includes: bonding each of the earphone magnets to the inner wall of the earphone front shell using an adhesive dispensing process.

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