Acoustic output device and connecting components thereof

Abstract

The present application mainly relates to an acoustic output device and a connection assembly thereof, the connection assembly comprising a substrate, a plurality of conformal circuits and a coating, the substrate is curved along its length direction, a plurality of conformal circuits are conformally arranged on the substrate and spaced apart from each other on a reference section perpendicular to the length direction of the substrate, the plurality of conformal circuits further extend from the first end of the substrate to the second end along the length direction of the substrate, the coating wraps around the plurality of conformal circuits and the periphery of the substrate; wherein the plurality of conformal circuits are used to realize electrical connection between electrical devices respectively mounted on the first end and the second end of the substrate. The connection assembly provided by the present application conformally arranges a plurality of conformal circuits on its substrate, so that the conformal circuits can be close to the substrate, so as to reduce the space between the multi-strand wires and the structural parts such as the elastic metal wire in the related art, thereby making the connection assembly more compact in structure.

Description

Technical Field

[0001] The present application relates to the technical field of communication equipment, and in particular to an acoustic output device and a connecting component thereof. Background Art

[0002] Acoustic output devices (such as headphones) have been widely used in people's daily lives. They can be used in conjunction with electronic devices such as mobile phones and computers to provide users with an auditory feast. Among them, according to the interaction method between headphones and electronic devices, headphones can generally be divided into wired and wireless types. For wireless headphones, in addition to the left and right movements (for sound generation), motherboards and other electrical devices, they generally also include batteries. The above-mentioned electrical devices must not only achieve structural connections, but also circuit connections. For some wired headphones, one of its movements can be directly connected to the electronic device in the circuit through the motherboard and through a plug-in cable, and the other movement needs to be connected to the motherboard first with the help of an additional wire, and the additional wire extends from one end of the headset to the other end where the motherboard is located. Summary of the invention

[0003] An embodiment of the present application provides a connection component for an acoustic output device, wherein the connection component includes a substrate, a plurality of conformal circuits and a coating, wherein the substrate is curved along its length direction, and on a reference cross section perpendicular to the length direction of the substrate, the plurality of conformal circuits are conformally arranged on the substrate and spaced apart from each other, and the plurality of conformal circuits further extend from a first end to a second end of the substrate along the length direction of the substrate, and the coating wraps around the plurality of conformal circuits and the periphery of the substrate; wherein the plurality of conformal circuits are used to realize electrical connection between electrical devices respectively mounted on the first end and the second end of the substrate.

[0004] An embodiment of the present application also provides an acoustic output device, wherein the acoustic output device includes an electrical device and a connecting component, the connecting component includes a substrate, a plurality of conformal circuits and a coating, the substrate is curved along its length direction, and on a reference cross section perpendicular to the length direction of the substrate, a plurality of conformal circuits are conformally arranged on the substrate and spaced apart from each other, the plurality of conformal circuits further extend from a first end to a second end of the substrate along the length direction of the substrate, and the coating is wrapped around the periphery of the plurality of conformal circuits and the substrate; wherein the first end and the second end of the substrate are respectively mounted with electrical devices, and the plurality of conformal circuits are used to realize electrical connection between the electrical devices.

[0005] The beneficial effect of the present application is that the connection component provided by the present application conformally arranges multiple conformal circuits on its base, so that the conformal circuits can be close to the base, thereby reducing the space between multi-strand conductors and structural parts such as elastic metal wires in the related technology, thereby making the connection component more compact in structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0007] Figure 1 is a structural schematic diagram of an embodiment of an acoustic output device provided by the present application;

[0008] Figure 2 yes Figure 1 A schematic diagram of the exploded structure of an embodiment of a middle ear hook assembly;

[0009] Figure 3 yes Figure 1 A schematic diagram of the exploded structure of another embodiment of the middle ear hook assembly;

[0010] Figure 4 yes Figure 2 and Figure 3 A schematic diagram of the structure of an embodiment of wiring between various electrical devices;

[0011] Figure 5 yes Figure 1 A schematic diagram of the cross-sectional structure of the middle connecting component along the VV direction;

[0012] Figure 6 yes Figure 1 A schematic diagram of the top view of the connecting component;

[0013] Figure 7 yes Figure 5 A schematic structural diagram of another embodiment of the middle substrate;

[0014] Figure 8 yes Figure 5 A schematic cross-sectional structure diagram of another embodiment of the connecting assembly;

[0015] Fig. 9 yes Figure 5 A schematic diagram of the orthographic projection structure of the first group of conformal lines on the substrate;

[0016] Fig.10 yes Figure 5 Schematic diagram of the orthographic projection structure of the second group of conformal lines on the substrate. DETAILED DESCRIPTION

[0017] The present application is further described in detail below in conjunction with the accompanying drawings and examples. It is particularly noted that the following examples are only used to illustrate the present application, but are not intended to limit the scope of the present application. Similarly, the following examples are only some embodiments of the present application rather than all embodiments, and all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0018] Reference to "embodiment" in this application means that a specific feature, structure or characteristic described in conjunction with the embodiment may be included in at least one embodiment of this application. It is explicitly and implicitly understood by those skilled in the art that the embodiment described in this application may be combined with other embodiments.

[0019] See also Figures 1 to 4 , Figure 1 is a structural schematic diagram of an embodiment of an acoustic output device 10 provided in the present application, Figure 2 yes Figure 1 A schematic diagram of the exploded structure of an embodiment of the middle ear hook assembly 30, Figure 3 yes Figure 1 A schematic diagram of the exploded structure of another embodiment of the middle ear hook assembly 30, Figure 4 yes Figure 2 and Figure 3 A schematic diagram of the structure of an embodiment of wiring between various electrical devices.

[0020] In the embodiment of the present application, the acoustic output device 10 can be a hearing aid, a listening bracelet, an air conduction earphone, a bone conduction earphone, a headset, an in-ear earphone, etc., and can be specifically hung on the user's head or ear. When the acoustic output device 10 is specifically hung on the user's head, the weight of the acoustic output device 10 is mainly borne by the top of the user's head; and when the acoustic output device 10 is specifically hung on the user's ear, the weight of the acoustic output device 10 is mainly borne by the user's ear. Further, for a headset, the acoustic output device 10 can specifically be an air conduction acoustic output device or a bone conduction acoustic output device. Among them, the present application takes the acoustic output device 10 as a bone conduction earphone hung on the user's ear as an example for exemplary description.

[0021] like Figure 1As shown, the acoustic output device 10 may include two movements 20, two ear hook components 30, a connecting component 40, a main board 50 and a battery 60. Among them, one end of the two ear hook components 30 is respectively connected to the corresponding movement 20, and the two ends of the connecting component 40 are respectively connected to the other end of the two ear hook components 30 away from the movement 20. Further, the two ear hook components 30 can be curved so that they can be hung on the two ears of the user respectively; the connecting component 40 can also be curved so that it can be wrapped around the back of the user's head, thereby facilitating the user to wear the acoustic output device 10. In this way, when the acoustic output device 10 is in the wearing state, the two movements 20 are respectively located on the left and right sides of the user's head; and under the cooperation of the two ear hook components 30 and the connecting component 40, the two movements 20 can clamp the user's head and contact the user's skin, thereby realizing the transmission of sound based on bone conduction technology.

[0022] Furthermore, the mainboard 50 and the battery 60 can be arranged in the same ear hook component 30; or they can be arranged in two ear hook components 30 respectively, and the specific structure will be described in detail later. Among them, the mainboard 50 and the battery 60 can be electrically connected to the two movements 20 through corresponding conductors; the former can be used to control the sound of the movement 20 (mainly converting electrical signals into mechanical vibrations), and the latter can be used to provide electrical energy to the acoustic output device 10 (specifically, it can be two movements 20). Of course, the acoustic output device 10 described in the present application can also include microphones such as microphones and pickups, and can further include communication devices such as Bluetooth and NFC (Near Field Communication), which are electrically connected to the mainboard 50 and the battery 60 through corresponding conductors to achieve corresponding functions.

[0023] It should be noted that: the present application provides two movements 20, both of which can make sounds, mainly to facilitate the acoustic output device 10 to achieve stereo sound effects, thereby improving the acoustic expressiveness of the acoustic output device 10. Therefore, in other application scenarios where stereo requirements are not particularly high, such as hearing aids for hearing-impaired patients, (host) live prompting, etc., the acoustic output device 10 can also be provided with only one movement 20.

[0024] like Figure 2 or Figure 3As shown, the ear hook assembly 30 may include an ear hook shell 31 and a decorative piece 32. The decorative piece 32 may be assembled with the ear hook shell 31 by one or a combination of assembly methods such as gluing, clamping, and riveting. In this way, when the acoustic output device 10 is in a wearing state, the decorative piece 32 is located on the side of the ear hook shell 31 away from the movement 20, that is, located on the outside of the acoustic output device 10, so that the decorative piece 32 can decorate the ear hook shell 31, thereby increasing the aesthetic appearance of the acoustic output device 10.

[0025] Further, the ear hook shell 31 may include an acoustic output device fixing portion 311, a bending transition portion 312 and a storage compartment 313 connected in sequence. Among them, the acoustic output device fixing portion 311 is mainly used to fix the movement 20, and the two can be assembled by one or a combination of assembly methods such as gluing, clamping, riveting, etc. The bending transition portion 312 connects the storage compartment 313 and the acoustic output device fixing portion 311, and is bent so that the ear hook assembly 30 can be hung on the outside of the human ear. Further, one end of the storage compartment 313 away from the acoustic output device fixing portion 311 can be connected to the connecting assembly 40 by one or a combination of assembly methods such as gluing, clamping, threaded connection, etc., so as to facilitate the assembly between the ear hook assembly 30 and the connecting assembly 40. Among them, one end of the storage compartment 313 is open to accommodate the motherboard 50 or the battery 60. At this time, the ear hook shell 31 may also include a compartment cover 314, and the compartment cover 314 is covered on the open end of the storage compartment 313. Furthermore, since the mainboard 50 or the battery 60 and the movement 20 are arranged at both ends of the ear hook housing 31, the ear hook housing 31 can at least open a wiring groove 315 in the bending transition portion 312 to facilitate the insertion of the conductor. At this time, the decorative member 32 can be embedded in the wiring groove 315, thereby covering the conductor in the wiring groove 315. Such an arrangement can not only increase the aesthetic appearance of the acoustic output device 10, but also facilitate the arrangement of the wiring structure.

[0026] for Figure 2For the ear hook assembly 30 shown, the storage compartment 313 can be mainly used to accommodate the motherboard 50. At this time, the ear hook assembly 30 can also include a control key 33 and a Type-C (USB) interface 34. Among them, the control key 33 and the Type-C (USB) interface 34 can be arranged on the storage compartment 313, so that the two can be electrically connected to the motherboard 50, thereby shortening the wiring distance between the two. At this time, the control key 33 and the Type-C (USB) interface 34 can be partially exposed outside the ear hook shell 31, so that the user can perform corresponding operations. In this way, the control key 33 can be used to realize the functions of turning on and off the acoustic output device 10, adjusting the volume, etc., and the Type-C (USB) interface 34 can be used to realize functions such as data transmission and charging. In addition, the ear hook assembly 30 can also include an indicator light 35. Among them, the indicator light 35 can be arranged on the storage compartment 313, so as to be connected to the motherboard 50, thereby shortening the wiring distance. At this time, the indicator light 35 can be partially exposed outside the ear hook shell 31, such as Figure 2 It may also specifically include an LED light source hidden in the ear hook housing 31 and a light guide member ( Figure 2 In this way, the indicator light 35 can provide prompts when the acoustic output device 10 is being charged or the battery is low.

[0027] for Figure 3 For the ear hook assembly 30 shown, the storage compartment 313 can be mainly used to accommodate the battery 60. At this time, the ear hook assembly 30 can also include a function button 36, and the ear hook shell 31 is also provided with a button adapter hole 317. Among them, the decorative member 32 is assembled and fixed on one side of the ear hook shell 31, and the function button 36 is arranged on the other side of the ear hook shell 31 away from the decorative member 32, and is exposed through the button adapter hole 317; the decorative member 32 further extends in a cantilever form to the top of the function button 36 exposed through the button adapter hole 317, and can trigger the function button 36 under external force. In this way, the function button 36 can replace the above-mentioned control button 33 to simplify the structure of the acoustic output device 10; it can also coexist with the above-mentioned control button 33, and can be used to implement functions such as play / pause and AI wake-up to expand the interactive capabilities of the acoustic output device 10.

[0028] Furthermore, the button adapting hole 317 can be provided in the acoustic output device fixing part 311, so that the user can press the function button 36 in the acoustic output device fixing part 311. At this time, the ear hook assembly 30 can also include a sealing member 37, and the sealing member 37 is arranged between the function button 36 and the acoustic output device fixing part 311. The material of the sealing member 37 can be but not limited to silicone, rubber, etc. In this way, the waterproof performance of the acoustic output device fixing part 311 in the area where the function button 36 is located can be increased, and the pressing touch of the function button 36 can also be improved.

[0029] It should be noted that: Figure 2 The housing compartment 313 is mainly used to accommodate the mainboard 50. Figure 3 The storage compartment 313 shown can be mainly used to accommodate the battery 60. Figure 2 The ear hook assembly 30 shown corresponds to the left ear hook of the acoustic output device 10. Figure 3 The ear hook assembly 30 shown may correspond to the right ear hook of the acoustic output device 10; Figure 2 The ear hook assembly 30 shown corresponds to the right ear hook of the acoustic output device 10. Figure 3The ear hook assembly 30 shown may correspond to the left ear hook of the acoustic output device 10. In other words, the main board 50 and the battery 60 may be respectively arranged in the two ear hook assemblies 30. Such an arrangement can not only increase the capacity of the battery 60 to improve the endurance of the acoustic output device 10, but also balance the weight of the acoustic output device 10 to improve the wearing comfort of the acoustic output device 10. Further, when the acoustic output device 10 is in a wearing state, the acoustic output device 10 will be hung on the outside of the human ear. Specifically, the movement 20 is generally located on the front side of the human ear, and the main board 50 or the battery 60 is generally located on the back side of the human ear. At this time, the human ear supports the acoustic output device 10 as a fulcrum, resulting in the human ear bearing most of the weight of the acoustic output device 10. After the user wears the acoustic output device 10 for a long time, it may cause discomfort. For this reason, the ear hook shell 31 (especially the bending transition portion 312) is generally made of a softer material to improve the wearing comfort of the acoustic output device 10. The material of the ear hook shell 31 may be, but is not limited to, polycarbonate (PC), polyamides (PA), acrylonitrile butadiene styrene (ABS), polystyrene (PS), high impact polystyrene (HIPS), polypropylene (PP), polyethylene terephthalate (PET), polyvinyl chloride (PVC), polyurethanes (PU), polyethylene (PE), phenolic resin (PF), urea-formaldehyde resin (UF), melamine-formaldehyde resin (MF), silicone, etc. Furthermore, due to the soft texture of the ear hook shell 31, the ear hook shell 31 has insufficient rigidity and is difficult to maintain its structure under the action of external force, and even has the risk of being broken due to insufficient strength. To this end, the ear hook housing 31 may have an elastic metal wire (at least in the bending transition portion 312) built therein. Figure 2 and Figure 3 (not shown) in order to improve the strength of the ear hook shell 31, thereby increasing the reliability of the ear hook shell 31. Among them, the material of the elastic metal wire can be but is not limited to spring steel, titanium alloy, titanium nickel alloy, chrome molybdenum steel, etc. At this time, the ear hook shell 31 can be a metal insert injection molded integrally molded structural part.

[0030] Based on the above detailed description, the acoustic output device 10 may include two movements 20, a control key 33, a function key 36, a mainboard 50, a battery 60 and other electrical components. Since the normal operation of the above electrical components requires both the power provided by the battery 60 and the control instructions issued by the mainboard 50, a reasonable circuit design is required between them. In addition, Figures 1 to 3 As shown, since the electrical devices are often evenly arranged on the two ear hook components 30, that is, the electrical devices are often evenly distributed at both ends of the connecting component 40, the circuit design between the electrical devices often needs to rely on the connecting component 40, that is, the connecting component 40 is responsible for part of the routing of the acoustic output device 10. Figure 4 As shown, the movement 20, control keys 33 and other electrical devices on one side of the mainboard 50 can be electrically connected to the mainboard 50 through a conductor without passing through the connecting assembly 40; the movement 20, function keys 36 and other electrical devices on one side of the battery 60 can also be electrically connected to the battery 60 through a conductor without passing through the connecting assembly 40. However, the electrical connection between the battery 60 and the mainboard 50, and the electrical connection between the movement 20, function keys 36 and other electrical devices on one side of the battery 60 and the mainboard 50 need to pass through the connecting assembly 40. In the related art, the wiring structure of this part is often designed as a multi-strand wire, making the wiring structure of this part relatively thick. At this time, when the multi-strand wire (whose cross section is generally circular) is matched with the structural parts such as the elastic metal wire of this part (whose cross section is also generally circular), a large space is often left between the two, resulting in the size of this part being often relatively thick. To this end, the present application takes a different approach by splitting the multi-strand wires in the related art, routing them separately, and making them conformal with structural parts such as elastic metal wires to reduce the space between the two, thereby making the connection component 40 more compact in structure.

[0031] Shared Reference Figure 5 and Figure 6 , Figure 5 yes Figure 1 A schematic diagram of the cross-sectional structure of the middle connecting assembly 40 along the VV direction, Figure 6 yes Figure 1 It should be noted that: since the connecting component 40 is curved in overall structure, its length direction is not a straight line, but a curve. Figure 1 The VV direction shown in FIG. 4 may be perpendicular to the length direction of the connecting component 40, such that Figure 5 The plane where the cross-sectional structure is shown may represent a reference cross section perpendicular to the length direction of the connecting component 40 (ie, the base 41 thereof).

[0032] like Figure 5As shown, the connection component 40 may include a base 41, a plurality of conformal lines 42 and a coating 43. The base 41 is curved along its length so that the connection component 40 can be hung on the head or ear of the user. For example, when the connection component 40 is specifically hung on the head of the user, the weight of the acoustic output device 10 is mainly borne by the top of the user's head; and when the connection component 40 is specifically hung on the ear of the user, the weight of the acoustic output device 10 is mainly borne by the ear of the user. At this time, the base 41 can mainly support the connection component 40 to maintain its basic structural form, and then when the user wears the acoustic output device 10, the connection component 40 can cooperate with the two movements 20 and the two ear hook components 30 to provide a clamping force to increase the stability and reliability of wearing. Further, on the reference cross section perpendicular to the length direction of the base 41, the cross-sectional shape of the base 41 can be circular, rectangular, trapezoidal, etc.; multiple conformal lines 42 can be conformally arranged on the base 41 and spaced apart from each other. Among them, multiple conformal lines 42 further extend from the first end of the substrate 41 to the second end along the length direction of the substrate 41, so that multiple conformal lines 42 can realize electrical connection between electrical devices (such as the above-mentioned movement 20, function button 36, mainboard 50, battery 60, etc.) mounted on the first end and the second end of the substrate 41, respectively, thereby replacing the multi-strand wires in the related art. At this time, in order to avoid short circuits in multiple conformal lines 42, the insulation impedance between multiple conformal lines 42 can be no less than 10 megohms. Furthermore, the coating 43 is wrapped around the periphery of the multiple conformal lines 42 and the substrate 41 to protect the multiple conformal lines 42 and the substrate 41, thereby increasing the service life of the connection component 40. Among them, the material of the coating 43 can be but not limited to polycarbonate, polyamide, silicone, rubber, etc., and the texture is relatively soft to increase the wearing comfort of the connection component 40.

[0033] It should be noted that the conformal arrangement described in this application is mainly in the reference cross section, and the shapes of the surfaces of the multiple conformal lines 42 in contact with the substrate 41 are substantially consistent with each other. Figure 5 As shown, the surface of the substrate 41 is a plane, and the surfaces where the plurality of conformal lines 42 contact the substrate 41 are also correspondingly planes. Figure 7As shown, the surface of the substrate 41 is an arc surface, and the surfaces of the multiple conformal lines 42 in contact with the substrate 41 are also correspondingly arc surfaces; and the bending directions and curvature radii of the two are also generally consistent. Such a configuration can effectively reduce the space between the multiple strands of wires (whose cross-section is generally circular) and the elastic metal wire and other structural parts (whose cross-section is also generally circular) in the related art, thereby making the connection component 40 more compact in structure. Therefore, the multiple conformal lines 42 can be formed on the substrate 41 through conformal circuit manufacturing processes, photolithography processes, electroplating processes, roller printing processes, etc. Among them, the material of the multiple conformal lines 42 can be but not limited to gold, silver, copper, nickel, tin, silver, palladium, rhodium, etc. or their alloys. Of course, the multiple conformal lines 42 can also be wires pasted on the substrate 41, but the two need to satisfy a conformal structural relationship.

[0034] In some embodiments, the substrate 41 may include an elastic metal wire 411 and an insulating layer 412 wrapped around the elastic metal wire 411. At this time, a plurality of conformal lines 42 are conformally arranged on the insulating layer 412. The material of the elastic metal wire 411 may be, but not limited to, spring steel, titanium alloy, titanium-nickel alloy, chrome-molybdenum steel, etc.; the material of the insulating layer 412 may be, but not limited to, vinyl resin paint, acrylic resin paint, polyester resin paint, epoxy resin paint, polyurethane paint, organic element paint, rubber paint, etc., and may also be, but not limited to, grease paint, natural resin, phenolic resin, asphalt paint, etc. At this time, the insulating layer 412 may be formed on the surface of the substrate 41 by spraying, spraying, coating, electrophoresis, vapor deposition, etc. Further, the plurality of conformal lines 42 may be a metal layer attached and fixed to the insulating layer 412.

[0035] Furthermore, the substrate 41 may also include a bonding layer 413 disposed between the elastic metal wire 411 and the insulating layer 412. The bonding layer 413 may be, but is not limited to, chloroprene rubber adhesive, nitrile rubber adhesive, polyurethane adhesive, acrylic adhesive, polymethacrylate adhesive, silicone rubber adhesive, etc. This arrangement makes the adhesion coefficient of the bonding layer 413 to the elastic metal wire 411 greater than the adhesion coefficient of the insulating layer 412 to the elastic metal wire 411, so as to increase the adhesion between the insulating layer 412 and the substrate 41, that is, the insulating layer 412 can be better attached to the elastic metal wire 411 through the bonding layer 413, thereby improving the firmness of the connection assembly 40 in the overall structure.

[0036] It should be noted that: since the elastic metal wire 411 is not an insulator, it has a certain conductivity, so that the elastic metal wire 411 can be further used to achieve electrical connection between electrical devices mounted on the first end and the second end of the substrate 41. At this time, the elastic metal wire 411 can not only structurally support the entire connection component 40, but also cooperate with the multiple conformal lines 42 as part of the routing structure, so that it can be "one piece for two purposes", thereby simplifying the circuit structure of the connection component 40 and saving costs.

[0037] In some other embodiments, the substrate 41 may be a hard plastic part, which may have a certain amount of deformation (that is, the curvature corresponding to its curved shape may be reduced), structural strength, and certain electrical insulation, thereby taking into account the wearing of the connection component 40, the support of the substrate 41 to the connection component 40, and the electrical insulation requirements of the multiple conformal lines 42. In this case, the multiple conformal lines 42 may be directly conformally arranged on the substrate 41, or a bonding layer 413 may be added between the two.

[0038] The following is an exemplary description taking the shape of the base body 41 on the reference cross section as a substantially rectangular shape as an example:

[0039] Since the multiple conformal lines 42 (and the elastic metal wires 411 ) need to realize electrical connection between multiple electrical devices, the multiple conformal lines 42 can be divided into multiple groups according to specific electrical connection requirements, thereby reasonably arranging the routing structure in the connection component 40 .

[0040] See again Figure 5, on the reference cross section, the base 41 may have a first surface 414 and a second surface 415 facing each other. In this case, the first surface 414 and the second surface 415 may both be planes. Wherein, on the reference cross section, the width of the first surface 414 and the second surface 415 is greater than the distance between the first surface 414 and the second surface 415. In other words, for the base 41, its shape on the reference cross section may be rectangular; and for the connecting component 40, its shape in the length direction may be flat, and of course, it also has a curved arc. Such a setting can limit the rotational freedom of the connecting component 40 to a certain extent, thereby preventing the user from causing the acoustic output device 10 to break due to improper operations such as stretching and bending the connecting component 40 during the use of the acoustic output device 10. Wherein, the ratio of the width of the first surface 414 and the second surface 415 to the distance between the first surface 414 and the second surface 415 may be 2:1-4:1; preferably, the above ratio may be 3:1. In a specific embodiment, the length of the base 41 can be 200 mm, the width of the first surface 414 and the second surface 415 (that is, the width of the base 41) can be 2.4 mm, and the distance between the first surface 414 and the second surface 415 (that is, the thickness of the base 41) can be 0.8 mm. Further, the edges of the first surface 414 and the second surface 415 can be rounded, that is, the edges and corners of the base 41 can be rounded, so that the outer surface of the connecting component 40 can also be a circular arc transition to reduce unnecessary wear.

[0041] Further, one of the first surface 414 and the second surface 415 faces the inner side of the curved shape of the base 41, and the other of the first surface 414 and the second surface 415 faces the outer side of the curved shape of the base 41. Figure 6 As shown, the first surface 414 faces the inner side of the curved shape of the base 41, and the second surface 415 faces the outer side of the curved shape of the base 41, that is, when the connecting component 40 is hung on the head or ear of the user, the part of the connecting component 40 corresponding to the first surface 414 can contact the user's skin, while the part of the connecting component 40 corresponding to the second surface 415 does not contact (or rarely contacts) the user's skin.

[0042] It should be noted that: on the reference cross section, if the cross-sectional shape of the substrate 41 is as follows Figure 7 As shown in the circular shape, the substrate 41 does not have a first surface 414 and a second surface 415 in a strict sense. In this case, the plurality of conformal lines 42 can be evenly distributed in the circumferential direction of the substrate 41 .

[0043] Based on the basic structure of the substrate 41, the multiple conformal lines 42 can be divided into two groups. Among them, the first group of conformal lines 421 is conformally arranged on the first surface 414, and the second group of conformal lines 422 is conformally arranged on the second surface 415. In this way, the surface of the substrate 41 can be fully utilized, and the routing structure in the connection component 40 can be reasonably arranged. Furthermore, in order to meet the electrical insulation between the multiple conformal lines 42, the spacing between the conformal lines in the first group of conformal lines 421 is not less than 0.1 mm, and the spacing between the conformal lines in the second group of conformal lines 422 is not less than 0.1 mm.

[0044] See again Figure 5 , the number of conformal lines in the first group of conformal lines 421 may be less than the number of conformal lines in the second group of conformal lines 422; and on the reference cross section, the cross-sectional area of ​​the conformal lines in the first group of conformal lines 421 may be greater than the cross-sectional area of ​​the conformal lines in the second group of conformal lines 422. For example: on the reference cross section, each conformal line has a width along the first surface 414 or the second surface 415 where it is located, and has a thickness along the direction perpendicular to the first surface 414 or the second surface 415; wherein the width of the conformal lines in the first group of conformal lines 421 may be greater than the width of the conformal lines in the second group of conformal lines 422. Of course, the thickness of the conformal lines in the first group of conformal lines 421 may also be greater than the thickness of the conformal lines in the second group of conformal lines 422. At this time, when the resistivity of the plurality of conformal lines 42 is substantially equal, the conformal lines in the first group of conformal lines 421 may have a smaller resistance value. The inventors of the present application have found in long-term research that in order to meet the electrical connection between various electrical devices in the acoustic output device 10 and reduce the impedance as much as possible, the resistance value of the conformal lines in the first group of conformal lines 421 may not exceed 100 milliohms, and the resistance value of the conformal lines in the second group of conformal lines 422 may not exceed 500 milliohms. Similarly, the number of conformal lines in the second group of conformal lines 422 may also be less than the number of conformal lines in the first group of conformal lines 421, and on the reference cross section, the cross-sectional area of ​​the conformal lines in the second group of conformal lines 422 may be greater than the cross-sectional area of ​​the conformal lines in the first group of conformal lines 421.

[0045] Furthermore, combined with Figures 1 to 4, the conformal lines in the first group of conformal lines 421 can be used to realize the electrical connection between the battery 60 mounted on the first end of the substrate 41 and the mainboard 50 mounted on the second end of the substrate 41. In this way, since the Type-C (USB) interface 34 can be set on the side of the mainboard 50, the electric energy of the battery 60 needs to be transmitted through the conformal lines in the connection component 40 (specifically, the first group of conformal lines 421) during the charging process; then, when the resistance value of the conformal lines in the first group of conformal lines 421 is less than the resistance value of the conformal lines in the second group of conformal lines 422, the first group of conformal lines 421 is used to transmit the electric energy during the charging process, which can not only reduce the loss of electric energy, but also improve the heating problem of the acoustic output device 10 during the charging process.

[0046] In some embodiments, in combination Figure 4 and Figure 5 , the number of conformal lines in the first group of conformal lines 421 can be two, and the number of conformal lines in the second group of conformal lines 422 can be three. The conformal lines in the first group of conformal lines 421 are used to form a current loop between the battery 60 and the mainboard 50; two of the second group of conformal lines 422 cooperate with each other, and the remaining one cooperates with the elastic metal wire 411 to form a current loop between the mainboard 50 and the movement 20 mounted on the first end of the substrate 41 (that is, the movement 20 on the side close to the battery 60) and between the mainboard 50 and the function key 36 mounted on the first end of the substrate 41.

[0047] Further, on the reference cross section, the width of the first surface 414 and the width of the second surface 415 may be equal. In this way, when the conformal lines in the second group of conformal lines 422 can meet the signal transmission of the corresponding electrical device, the width of the conformal lines in the first group of conformal lines 421 can be as large as possible, thereby reducing the resistance value of the conformal lines in the first group of conformal lines 422 as much as possible. Of course, on the reference cross section, the width of the first surface 414 and the width of the second surface 415 may not be equal. In this way, when the conformal lines in the second group of conformal lines 422 can meet the signal transmission of the corresponding electrical device, and the conformal lines in the first group of conformal lines 421 can also meet the signal transmission of the corresponding electrical device, by reducing the width of the first surface 414 or the second surface 415, materials can be saved and the cost of the connection component 40 can be reduced.

[0048] In some other embodiments, in combination Figure 4 and Figure 8, the number of conformal lines in the first group of conformal lines 421 can be two, and the number of conformal lines in the second group of conformal lines 422 can be four. The conformal lines in the first group of conformal lines 421 are used to form a current loop between the battery 60 and the main board 50; the conformal lines in the second group of conformal lines 422 cooperate with each other, that is, they are further divided into two groups, so as to form a current loop between the main board 50 and the movement 20 mounted on the first end of the substrate 41 (that is, the movement 20 on the side close to the battery 60), and to form a current loop between the main board 50 and the function key 36 mounted on the first end of the substrate 41.

[0049] Shared Reference Fig. 9 and Fig.10 , Fig. 9 yes Figure 5 Schematic diagram of the orthographic projection structure of the first group of conformal lines 421 on the substrate 41, Fig.10 yes Figure 5 FIG. 4 is a schematic diagram of the orthographic projection structure of the second group of conformal lines 422 on the substrate 41 .

[0050] like Fig. 9 and Fig.10 As shown, due to the width of the conformal lines in the first group of conformal lines 421 (such as Fig. 9 The dimension W1 in FIG. 4 may be greater than the width of the conformal lines in the second group of conformal lines 422 (eg, Fig.10 ), so that pads are not required at both ends of the conformal lines in the first group of conformal lines 421 (e.g. Fig.10 The square ears shown in the figure are used to simplify the structure of the first group of conformal lines 421. The difference is that since the width W2 of the conformal lines in the second group of conformal lines 422 is smaller, in order to meet the welding requirements between the conformal lines in the second group of conformal lines 422 and other electrical devices, the conformal lines in the second group of conformal lines 422 are respectively provided with welding pads at both ends, such as Fig.10 As shown, the contact area between the conformal circuits in the second group of conformal circuits 422 and other electrical devices is increased when the two are welded, thereby avoiding defects such as cold solder joints during the welding process.

[0051] The above descriptions are only some embodiments of the present application, and are not intended to limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An acoustic output device, It is characterized in that The acoustic output device includes an electrical device, an ear hook assembly and a connecting assembly, wherein the ear hook assembly is connected to the connecting assembly, and the connecting assembly includes a substrate, a plurality of conformal circuits and a coating, wherein the substrate is curved along its length direction, and on a reference cross section perpendicular to the length direction of the substrate, the plurality of conformal circuits are conformally arranged on the substrate and spaced apart from each other, and the plurality of conformal circuits further extend from the first end of the substrate to the second end along the length direction of the substrate, and the coating wraps around the plurality of conformal circuits and the periphery of the substrate; wherein the electrical device is mounted on the first end and the second end of the substrate respectively, and the plurality of conformal circuits are used to realize electrical connection between the electrical devices, and the electrical device is arranged on the ear hook assembly.

2. The acoustic output device according to claim 1, It is characterized in that The substrate includes an elastic metal wire and an insulating layer wrapped around the elastic metal wire, the conformal circuit is conformally arranged on the insulating layer, and the multiple conformal circuits are metal layers attached and fixed on the insulating layer.

3. The acoustic output device according to claim 2, It is characterized in that The substrate further includes a bonding layer disposed between the elastic metal wire and the insulating layer, and an adhesion coefficient of the bonding layer to the elastic metal wire is greater than an adhesion coefficient of the insulating layer to the elastic metal wire.

4. The acoustic output device according to claim 2, It is characterized in that The elastic metal wire is further used to realize electrical connection between electrical devices respectively mounted on the first end and the second end of the substrate.

5. The acoustic output device according to claim 1, It is characterized in that On the reference cross section, the substrate has a first surface and a second surface facing each other, the plurality of conformal lines are divided into two groups, the first group of conformal lines are conformally disposed on the first surface, and the second group of conformal lines are conformally disposed on the second surface.

6. The acoustic output device according to claim 5, It is characterized in that The number of conformal lines in the first group of conformal lines is smaller than the number of conformal lines in the second group of conformal lines, and on the reference cross section, the cross-sectional area of ​​the conformal lines in the first group of conformal lines is larger than the cross-sectional area of ​​the conformal lines in the second group of conformal lines.

7. The acoustic output device according to claim 6, It is characterized in that On the reference cross section, each conformal line has a width along the first surface or the second surface on which it is located, and has a thickness along a direction perpendicular to the first surface or the second surface, and the width of the conformal lines in the first group of conformal lines is greater than the width of the conformal lines in the second group of conformal lines.

8. The acoustic output device according to claim 6, It is characterized in that The number of conformal circuits in the first group of conformal circuits is two, which are used to form a current loop between the battery mounted on the first end of the substrate and the main board mounted on the second end of the substrate. The number of conformal circuits in the second group of conformal circuits is four, and they cooperate in pairs to form a current loop between the main board mounted on the second end of the substrate and the movement mounted on the first end of the substrate and between the main board and the function keys mounted on the first end of the substrate.

9. The acoustic output device according to claim 6, It is characterized in that The substrate includes an elastic metal wire and an insulating layer wrapped around the elastic metal wire, the conformal circuit is conformally arranged on the insulating layer, the number of conformal circuits in the first group of conformal circuits is two, and they are used to form a current loop between a battery mounted on the first end of the substrate and a mainboard mounted on the second end of the substrate, the number of conformal circuits in the second group of conformal circuits is three, two of the second group of conformal circuits cooperate with each other, and the remaining one cooperates with the elastic metal wire to respectively form a current loop between the mainboard mounted on the second end of the substrate and the movement mounted on the first end of the substrate, and between the mainboard and a function key mounted on the first end of the substrate.

10. The acoustic output device according to claim 5, It is characterized in that On the reference cross section, the widths of the first surface and the second surface are greater than the spacing between the first surface and the second surface, and one of the first surface and the second surface faces the inner side of the curved shape of the substrate, and the other of the first surface and the second surface faces the outer side of the curved shape of the substrate.

11. An acoustic output device, It is characterized in that The acoustic output device includes an electrical device and a connection component, wherein the connection component includes a substrate, a plurality of conformal lines and a coating, wherein the substrate is curved along its length direction, and the plurality of conformal lines are conformally arranged on the substrate and spaced apart from each other on a reference cross section perpendicular to the length direction of the substrate, and the plurality of conformal lines further extend from a first end to a second end of the substrate along the length direction of the substrate, and the coating wraps around the plurality of conformal lines and the substrate; The electrical devices are mounted on the first and second ends of the substrate respectively, and the multiple conformal circuits are used to achieve electrical connection between the electrical devices. The substrate includes an elastic metal wire and an insulating layer wrapped around the elastic metal wire. The conformal circuit is conformally arranged on the insulating layer, and the multiple conformal circuits are metal layers attached and fixed to the insulating layer.

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