Waterproof connection structure and earphone

Abstract

The utility model discloses a waterproof connection structure and an earphone. The waterproof connection structure comprises a housing and a cable assembly. The housing is provided with a jack. The cable assembly comprises an outer skin layer, a wire penetrating through the outer skin layer and a plug connected to the end of the outer skin layer. The plug is used for being connected with the plug hole in an inserted mode. Wherein the outer skin layer comprises a sleeve and a sealing ring assembly, the sealing ring assembly comprises at least two sealing rings connected with the plug and connecting pieces connected between the two adjacent sealing rings, and the sealing rings protrude towards the hole wall of the plug hole relative to the connecting pieces. The sealing rings are arranged at intervals along the plugging direction A of the plugging head and the plugging hole, and the sealing rings are in interference fit with the plugging hole. At least two sealing rings are arranged to be matched with the plugging hole for water prevention, so that the sealing performance between the plugging head and the plugging hole can be effectively improved, and the waterproof effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of earphones, in particular to a waterproof connection structure and an earphone. Background Art

[0002] Earphones, such as bone conduction earphones, usually include several functional devices and cable assemblies connecting the functional devices, such as earphone heads, battery compartments, or control compartments. Usually, there are two earphone heads, and the earphone heads and the battery compartment, the earphone heads and the control compartment, and the battery compartment and the control compartment are all connected by cable assemblies to achieve electrical connection between the functional devices. Usually, the cable assemblies between the earphone heads and the battery compartment and between the earphone heads and the control compartment are called ear hooks, and the cable assembly between the battery compartment and the control compartment is called a neck cable (or back hook).

[0003] The connection structure between the cable assembly and the functional device determines the reliability and waterproof performance of the connection. Some headphones use a plug-in structure to achieve the connection between the cable assembly and the functional device. For example, a plug is set at the end of the cable assembly and a jack is set on the functional device. Assembly is achieved through the plug and jack, and assembly is relatively convenient.

[0004] To achieve waterproofing of the plug-in structure, one feasible approach is to install a sealing ring between the plug and the socket to improve the waterproofing performance. However, some problems still exist. For example, the sealing ring can be easily squeezed during assembly, causing misalignment and affecting the final waterproofing effect. Another example is that the plug-in structure of some headphones usually only includes a sealing ring. To improve the waterproofing effect, the sealing ring has a large amount of interference with the hole wall of the functional device's socket. After the product has been used for a period of time, the internal stress caused by the continuous squeezing of the sealing ring on the assembly counterpart (i.e., the housing of the functional device) is too high, which can easily cause the counterpart to crack and affect the user experience.

[0005] The above content is only used to help understand the technical solution of this application and does not constitute an admission that the above is prior art. Utility Model Content

[0006] The purpose of the utility model is to provide a waterproof connection structure and earphones, wherein the waterproof connection structure has better sealing performance.

[0007] To achieve the above-mentioned purpose of the utility model, in a first aspect, the utility model proposes a waterproof connection structure, comprising:

[0008] A housing having a connector; and

[0009] A cable assembly comprising an outer layer, a wire passing through the outer layer, and a connector connected to an end of the outer layer, the connector being used to be plugged into the connector jack;

[0010] In which, the outer layer includes a sleeve and a sealing ring assembly, the sealing ring assembly includes at least two sealing rings connected to the plug and a connecting piece connected between two adjacent sealing rings, the sealing ring protrudes toward the hole wall of the connector relative to the connecting piece, the sealing ring is arranged at intervals along the plug-in direction A of the connector and the connector, and the sealing ring is interference fit with the connector.

[0011] Furthermore, a distance D1 between two adjacent sealing rings along the plugging direction A is 0.2-1.2 mm.

[0012] Furthermore, a distance D1 between two adjacent sealing rings along the plugging direction A is 0.3-0.7 mm.

[0013] Furthermore, the interference D2 between the sealing ring and the connecting hole is 0.05-0.5 mm.

[0014] Furthermore, the interference D2 between the sealing ring and the connecting hole is 0.1-0.2 mm.

[0015] Furthermore, a ratio of a wall thickness of a portion of the housing corresponding to the sealing ring to the interference amount D2 is not less than 10.

[0016] Furthermore, the plug connector and the socket connector are clearance-matched, and a clearance D3 between the plug connector and the socket connector is 0.05-0.5 mm.

[0017] Furthermore, the plug connector and the socket connector are clearance-matched, and a clearance D3 between the plug connector and the socket connector is 0.15-0.3 mm.

[0018] Furthermore, the width W2 of the sealing ring is 0.1-1.5 mm.

[0019] Furthermore, the width W2 of the sealing ring is 0.5-0.8 mm.

[0020] Furthermore, when viewed along the plugging direction A, the outer contour of the sealing ring is non-circular, the length L1 of the sealing ring is 3 to 10 mm, and the width W1 is 1 to 10 mm.

[0021] Furthermore, the sealing ring assembly is at least partially embedded in the connector, and a maximum embedding depth D4 of the sealing ring assembly in the connector is not less than 0.1 mm.

[0022] Furthermore, the connecting piece is annular, and a space for accommodating glue is formed between two adjacent sealing rings and the connecting piece.

[0023] Furthermore, the connector is provided with an annular groove, and the sealing ring assembly is matched with the annular groove.

[0024] Furthermore, the bottom of the annular groove includes a first part and a second part arranged along the plug-in direction A, and the first part and the second part both include at least one convex portion and at least one concave portion arranged along the circumference of the annular groove, and the convex portion and the concave portion are arranged in sequence, and in the plug-in direction A, the convex portion of the first part is arranged correspondingly to the concave portion of the second part, and the concave portion of the first part is arranged correspondingly to the convex portion of the second part, and the sealing ring assembly includes an embedded portion filled in the concave portion.

[0025] Furthermore, the sealing ring assembly and the sleeve are spaced apart along the plug-in direction A, the outer skin also includes at least one connecting rib connected between the sealing ring assembly and the sleeve, the connector is provided with a mounting groove adapted to the connecting rib, and the mounting groove is connected to the annular groove.

[0026] Furthermore, a protrusion is provided at the bottom of the installation groove, and the connecting rib is provided with a recess adapted to the protrusion.

[0027] Furthermore, the outer skin layer is injection molded on the connector.

[0028] Furthermore, the connector is provided with an end face facing away from the sleeve and at least one hook protruding from the end face, the hook being used to engage with the housing, and a distance L2 between the sealing ring assembly and the end face along the plugging direction A is 0.05 to 2 mm.

[0029] Furthermore, a distance L3 between the sealing ring assembly and the end surface of the sleeve facing the housing along the plugging direction A is 0.5 to 3 mm.

[0030] Furthermore, the sleeve and the sealing ring assembly are not connected; or, the outer skin layer is integrally formed, and the sealing ring assembly is connected to the sleeve.

[0031] Furthermore, there are two sealing rings.

[0032] In a second aspect, the present invention provides an earphone comprising the waterproof connection structure as described in any one of the above items.

[0033] Furthermore, the earphones include a battery compartment, a control compartment and two earphone heads, and one, two or all of the battery compartment and the control compartment, the battery compartment and the earphone heads, and the control compartment and the earphone heads are connected through the cable assembly.

[0034] Compared with the prior art, the present invention has the following beneficial effects: According to an embodiment of the present invention, the waterproof connection structure, its outer skin includes a sleeve and a sealing ring assembly, the sealing ring assembly includes at least two sealing rings connected to the plug and a connector connected between two adjacent sealing rings, the sealing rings protrude toward the hole wall of the socket relative to the connector, the sealing rings are spaced along the plug-in direction A of the plug and the socket, and the sealing rings have an interference fit with the socket. By providing at least two sealing rings to cooperate with the socket to achieve waterproofing, the sealing between the plug and the socket can be effectively improved, thereby improving the waterproofing effect. In addition, the two adjacent sealing rings are connected by the connector. On the one hand, the spacing between the sealing rings can be guaranteed by the connector, making the relative position accuracy between the sealing rings higher and less likely to change due to squeezing during the assembly process, thereby improving the waterproofing effect. On the other hand, the sealing ring assembly is installed as a whole, which helps to reduce the number of parts, simplify the assembly process, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of a waterproof connection structure of an embodiment of the present utility model.

[0036] Figure 2 It is a structural schematic diagram of a shell in one embodiment of the present utility model.

[0037] Figure 3 yes Figure 2 A schematic structural diagram of the housing shown in another direction.

[0038] Figure 4 It is a structural schematic diagram of a cable assembly in one embodiment of the present utility model.

[0039] Figure 5 This is a structural diagram of the outer skin of an embodiment of the present invention, in which the sleeve and the sealing ring assembly are connected.

[0040] Figure 6 This is a schematic structural diagram of the outer skin layer of an embodiment of the present invention, in which the sleeve and the sealing ring assembly are not connected.

[0041] Figure 7 It is a cross-sectional view of a waterproof connection structure of an embodiment of the present utility model.

[0042] Figure 8 yes Figure 7 Enlarged view of part I in the middle.

[0043] Figure 9 It is a schematic diagram of the outer skin layer of an embodiment of the present invention.

[0044] Figure 10It is a schematic diagram of a connector according to an embodiment of the present invention.

[0045] Figure 11 yes Figure 10 A perspective view of the connector is shown.

[0046] Figure 12 The utility model is a structural diagram of a conductive wire, an elastic metal wire and a connector connected in one embodiment.

[0047] Figure 13 It is a structural schematic diagram of an earphone in an embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It will be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some, rather than all, structures related to the present application are shown in the accompanying drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0049] As used herein, the terms "comprise," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0050] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0051] like Figure 1 As shown, the utility model discloses a waterproof connection structure, which includes a housing 1 and a cable assembly 2.

[0052] The housing 1 is provided with a socket 10, further reference is made to Figure 2 and Figure 3 The housing 1 has a flat outer end surface 11, and the socket 10 is provided on the outer end surface 11. The housing 1 also has an inner end surface 12 arranged opposite to the outer end surface 11, and the socket 10 is connected from the outer end surface 11 to the inner end surface 12.

[0053] like Figure 4 As shown, the cable assembly 2 includes an outer sheath 20, a conductor 21 extending through the outer sheath 20, and a connector 22 connected to the end of the outer sheath 20. The conductor 21 extends through the connector 22 to electrically connect to electronic components within an external functional device. The number of conductors 21 is not limited; one or more conductors can be used to transmit power or electrical signals.

[0054] like Figure 4 and Figure 5 As shown, the outer layer 20 includes a sleeve 206 and a sealing ring assembly 200. The sealing ring assembly 200 includes at least two sealing rings 201 connected to the plug 22 and a connector 202 connected between two adjacent sealing rings 201. The plug 22 and the socket 10 have a plugging direction A. It will be understood that the plugging direction A is consistent with the axial direction of the plug 22 or the socket 10. The sealing rings 201 are spaced along the plugging direction A and have an interference fit with the socket 10, thereby forming a waterproof seal at the connection between the cable assembly 2 and the housing 1.

[0055] The connector plug 22 is used to be plugged into the connector socket 10 . In some embodiments, the connector plug 22 is snap-connected to the connector socket 10 . Figure 1 and Figure 4 A specific connection structure is shown. The plug 22 includes an end surface 222 facing away from the sleeve 206 and at least one hook 223 protruding from the end surface 222. Optionally, there are two hooks 223, which are arranged opposite each other. After the plug 22 is inserted into the socket 10, the hook 223 engages with the housing 1. Specifically, the hook portion 2230 at the outer end of the hook 223 engages the inner end surface 12 of the housing 1, thereby preventing the plug 22 from being removed from the socket 10.

[0056] By providing at least two sealing rings 201 to cooperate with the connector 10 for waterproofing, the seal between the connector 22 and the connector 10 can be effectively improved, thereby enhancing the waterproofing effect. Furthermore, adjacent sealing rings 201 are connected by a connector 202. This connector ensures the spacing between the sealing rings 201, increasing the relative positional accuracy between the sealing rings 201 and making them less susceptible to displacement due to squeezing during assembly, thereby improving the waterproofing effect. Furthermore, the sealing ring assembly is installed as a single unit, which helps reduce the number of parts, simplify the assembly process, and improve production efficiency.

[0057] In some embodiments, the outer skin layer 20 is integrally formed, for example, by injection molding. Since the outer skin layer 20 is integrally formed, the sealing ring assembly 200 is also integrally formed and connected to the sleeve 206, for example, the two are directly connected, or as shown in FIG. Figure 5 As shown in the embodiment, the sleeve 206 and the sealing ring assembly 200 are connected by the connecting rib 204. The connection between the sealing ring assembly 200 and the sleeve 206 is conducive to providing a certain resistance when the plug 22 and the socket 10 are plugged in, thereby reducing the displacement of the sealing ring 201. In other embodiments, the sealing ring assembly 200 can also be independently provided with the sleeve 206 and not connected. Figure 6 Optionally, the sealing ring assembly 200 is integrally formed.

[0058] Optionally, the connector 22 and the outer layer 20 are formed together by injection molding (e.g., two-color injection molding). In this way, the assembly step of the connector 22 and the outer layer 20 can be omitted, the production efficiency is higher, the injection molding precision is better, and the consistency of the sealing effect between the sealing ring 201 and the socket 10 is better. Figure 4 and Figure 7 As shown, the connector 22 is partially molded within the sleeve 206 .

[0059] In some embodiments, the outer layer 20 is made entirely of silicone material, and the connector 22 is made of plastic material, which may be, for example, PC+ABS, PC+glass fiber, or PA+glass fiber. Since silicone is elastic and has an interference fit with the connector 10, it can maintain a close fit with the connector 10, ensuring the reliability of the seal. The number of sealing rings 201 is at least two. The more sealing rings 201 there are, the better the sealing performance will be. However, this will also increase the cost and make the connector 10 and the connector 22 longer, making the volume of the housing 1 larger, which is not conducive to the wearing and use comfort of the device (such as headphones) that uses the waterproof connection structure. Therefore, optionally, the number of sealing rings 201 is two.

[0060] In some embodiments, reference Figure 8 The distance D1 between two adjacent sealing rings 201 along the plug-in direction A is 0.2 to 1.2 mm. When the distance between two adjacent sealing rings 201 is too large, the guide length required by the assembly design is large, the length of the plug-in position is too long, and the overall structural strength is weak. In addition, when the distance between the two sealing rings 201 is far apart, the sealing effect of the sealing ring 201 closer to the plug-in port (i.e., the outer end face 11) is relatively independent, and the sealing effect is weak, which cannot meet the set waterproof level requirements. The area between the two sealing rings 201 is prone to water ingress, and the overall waterproof effect will also be reduced. When the distance between two adjacent sealing rings 201 is too small, the interference area of their assembly position is too concentrated, the pressure on the docking jack 10 is large, and it is easy to cause cracking. Setting the distance D1 to 0.2 to 1.2 mm is conducive to achieving a better waterproof effect, reducing the pressure on the shell 1, and improving the service life. Further optionally, the distance D1 is 0.3 to 0.7 mm to further ensure the effect.

[0061] It is understood that the structure with at least two sealing rings 201 provides a larger contact area with the housing 1 than a structure with only one sealing ring 201, thus providing better guidance and positioning during assembly. Therefore, the connector 22 is less likely to tilt, thereby improving the waterproofing effect and stability of the waterproofing effect. Furthermore, setting the distance D1 to 0.2-1.2 mm, and further selecting it to 0.3-0.7 mm, can further ensure guidance and positioning during assembly, thereby ensuring the waterproofing effect.

[0062] refer to Figure 8 In some embodiments, a distance L2 between the sealing ring assembly 200 and the end surface 222 of the connector 22 where the hook 223 is provided is 0.05-2 mm along the plugging direction A.

[0063] In some embodiments, a distance L3 between the sealing ring assembly 200 and the end surface 2060 of the sleeve 206 facing the housing 1 along the plugging direction A is 0.5-3 mm.

[0064] When the distance L2 or L3 is too large, the sealing ring is concentrated in the middle of the connector 22, making it difficult to assemble and position the two ends of the connector 22. When the distance L2 or L3 is too small, the sealing ring is likely to leak out of the assembly end surface after assembly, which is not conducive to waterproofing.

[0065] In some embodiments, the interference D2 between the sealing ring 201 and the socket 10 is 0.05-0.5 mm. Interference D2 refers to the deformation of the sealing ring 201 caused by the compression of the socket 10 wall after assembly. It can also be understood as half the difference between the radial dimension of the sealing ring 201 and the radial dimension of the corresponding position of the socket 10 when not assembled. The size of interference D2 is closely related to the waterproof effect. The larger the interference D2, the better the waterproof effect. However, the greater the pressure on the housing 1, the more likely it is to cause the housing 1 to crack and increase the difficulty of assembly. Due to the high resistance during assembly, it is more likely to cause the sealing ring 201 to move. Once the sealing ring 201 moves, it will in turn have an adverse effect on the sealing performance. If the interference D2 is too small, it is difficult to achieve a good waterproof effect. Setting the interference D2 to 0.05-0.5 mm is conducive to meeting different levels of waterproofing requirements and structural strength requirements. Further, the interference D2 can be set to 0.1-0.2 mm to further strike a balance between waterproofing effect and structural strength. As some feasible examples, the interference amount D2 is 0.1mm, 0.12mm, 0.15mm, 0.17mm or 0.2mm. It is understandable that the sealing ring 201 protruding into the inner wall of the housing 1 in the figure is only for convenience of illustration. After actual assembly, the sealing ring 201 will be compressed and deformed and will not protrude into the interior of the housing 1.

[0066] Optionally, the ratio of the wall thickness of the portion of the shell 1 corresponding to the sealing ring 201 to the interference amount D2 is not less than 10, so that the shell 1 has sufficient structural strength and further reduces the risk of cracking due to continuous squeezing by the sealing ring 201.

[0067] To facilitate assembly of the connector 22 and the housing 1, a clearance between the connector 22 and the socket 10 is provided to facilitate insertion of the connector 22 into the socket 10 and to serve as a guide. Optionally, the clearance D3 between the connector 22 and the socket 10 is 0.05 to 0.5 mm to facilitate assembly without compromising waterproof performance. Furthermore, the clearance D3 can be 0.05 to 0.3 mm, and even more preferably, 0.05 to 0.15 mm.

[0068] In some embodiments, the width W2 of the sealing ring 201 is 0.1 to 1.5 mm. The width of the sealing ring 201 affects the area of compression between the sealing ring 201 and the connector 10 of the housing 1. The larger the width, the larger the area of compression on the housing 1, which is beneficial to improving the sealing effect. However, the compression force is greater, which can easily cause the housing 1 to crack, and vice versa. Setting the width W2 of the sealing ring 201 to 0.1 to 1.5 mm is beneficial for reducing the compression force on the housing 1 while ensuring the sealing effect, thereby reducing the risk of cracking. Further optionally, the width W2 of the sealing ring 201 is 0.5 to 0.8 mm to further ensure the effect.

[0069] The cross-sectional shape of the connector 10 is not limited, for example, it can be circular, rounded rectangular, elliptical, etc. Optionally, the connector 10 is a non-circular hole, which can provide a better limiting effect and prevent the cable assembly 2 from rotating around the axis of the circular hole under the action of torsion. In some embodiments, such as Figure 9 As shown, the cross-section of the connector 10 is approximately a rounded rectangle. It is understood that the outer contours of the cross-sections of the plug connector 10 and the sealing ring 201 also conform to the shape of the connector 10. Optionally, when viewed along the plugging direction A, the outer contour of the sealing ring 201 is non-circular, with a length L1 of 3 to 10 mm and a width W1 of 1 to 10 mm.

[0070] like Figure 5 and Figure 8As shown, optionally, the connector 202 is annular to better limit the distance between various parts of adjacent sealing rings 201. The sealing ring 201 protrudes toward the hole wall of the connector 10 relative to the connector 202, and a space 205 for accommodating glue is formed between the two adjacent sealing rings 201 and the annular connector 202. When connecting the cable assembly 2 and the shell 1, a small amount of glue can be applied to the plug position first. For example, structural glue can be applied to the outer surface of the sealing ring assembly 200 to make the connection between the connector 22 and the shell 1 tighter, while also improving the waterproof and sealing effects. The distance D1 between two adjacent sealing rings 201 affects the size of the space 205. Setting the distance D1 to 0.2 to 1.2 mm, and further selecting it to 0.3 to 0.7 mm, is conducive to allowing the space 205 to accommodate a certain amount of glue, so that the connector 22 and the shell 1 are firmly connected.

[0071] The sealing ring assembly 200 is at least partially embedded in the connector 22 to further reduce the risk of it shifting during assembly. Figure 10 and Figure 11 As shown, connector 22 is provided with an annular groove 220, into which the sealing ring assembly 200 mates, retaining the sealing ring assembly 200. During assembly, the sealing ring assembly 200 is positioned by the annular groove 220, preventing it from shifting. Furthermore, the distance between the sealing rings 201 is less likely to change due to compression or elongation of the sealing ring assembly 200. After assembly, the position of the sealing ring 201 relative to the connector 10 better meets design requirements, ensuring a secure seal and enhancing waterproofing.

[0072] Optionally, the bottom of the annular groove 220 includes a first portion 2201 and a second portion 2202 arranged along the plugging direction A. Figure 10 The approximate areas of the first portion 2201 and the second portion 2202 are shown by double-dotted lines. Figure 11 As shown, both the first portion 2201 and the second portion 2202 include at least one protrusion 2203 and at least one recess 2204 arranged circumferentially along the annular groove 220, with the protrusions 2203 and recesses 2204 arranged alternately. In the insertion direction A, the protrusions 2203 of the first portion 2201 correspond to the recesses 2204 of the second portion 2202, and vice versa. The sealing ring assembly 200 includes an embedded portion 203 that fills the recesses 2204. It will be appreciated that when the outer skin 20 is injection-molded onto the connector 22, material naturally fills the annular groove 220 (including its recesses 2204), thereby forming the embedded portion 203 and the connector 202.

[0073] The arrangement of the recessed portion 2204 and the raised portion 2203 allows the sealing ring assembly 200 and the connector 22 to engage in an alternating manner, which can further prevent the sealing ring assembly 200 from shifting and deforming along the plugging direction A during the plugging process. At the same time, it can also prevent shifting and deforming along the circumferential direction, thereby further improving the firmness of the connection between the sealing ring assembly 200 and the connector 22, and further ensuring the sealing and waterproof effects.

[0074] Optionally, the maximum embedding depth D4 of the sealing ring assembly 200 within the connector 22 is no less than 0.1 mm, ensuring sufficient embedding depth to effectively resist extrusion forces and prevent displacement during insertion. The maximum embedding depth D4 refers to the distance between the deepest point of the sealing ring assembly 200 and the outer surface of the connector 22. When the connector 22 is provided with an annular groove 220, the maximum embedding depth D4 can be understood as the distance between the deepest point of the annular groove 220 and the outer surface of the connector 22 provided with the annular groove 220.

[0075] In some embodiments, the sealing ring assembly 200 and the sleeve 206 are spaced apart along the insertion direction A. The outer skin 20 includes at least one connecting rib 204 connected between the sealing ring assembly 200 and the sleeve 206. The connector 22 is provided with a mounting groove 221 adapted to fit the connecting rib 204, which communicates with the annular groove 220. The connecting rib 204 embedded in the connector 22 can further enhance the secure connection between the connector 22 and the outer skin 20. The number of connecting ribs 204 can be one, two, or more. Figure 5 In the illustrated embodiment, there are two connecting ribs 204. Optionally, when there are more than two connecting ribs 204, the connecting ribs 204 are symmetrically arranged, for example, axially symmetrically arranged or centrally symmetrically arranged.

[0076] In order to further improve the firmness of the connection between the outer skin 20 and the connector 22, a protrusion 2210 is provided at the bottom of the mounting groove 221, and the connecting rib 204 is provided with a recess 2040 adapted to the protrusion 2210. The cooperation between the protrusion 2210 and the recess 2040 can limit the freedom of the connecting rib 204 along its extension direction, increase the contact area between the connecting rib 204 and the connector 22, and thus further increase the firmness of the connection between the outer skin 20 and the connector 22.

[0077] Optionally, when the outer layer 20 and the plug 22 are connected, the portion of the sealing ring assembly 200 other than the sealing ring 201 is flush with the outer surface of the plug 22, and the portion of the connecting rib 204 at least close to the sealing ring assembly 200 is flush with the outer surface of the plug 22, so that the outer surface of the sealing ring assembly 200, the connector 204 and the plug 22, except for the portion where the sealing ring 201 is located, is consistent with the gap between the connector hole 22, which is convenient for installation.

[0078] like Figure 12 As shown, the cable assembly 2 also includes an elastic wire 23 inserted into the outer layer 20. The elastic wire 23 is used to provide elastic force to restore the cable assembly 2 to its original shape. When the waterproof connection structure is applied to headphones, the headphone head can fit more closely against the skin of the face. The elastic wire 23 is made of an elastic material, such as a single metal, an alloy material including multiple metal materials, such as aluminum alloy, magnesium alloy, titanium alloy, spring steel, etc., or a composite material including metal and non-metallic materials. Optionally, the elastic wire 23 is made of a titanium alloy (titanium wire).

[0079] The present invention also provides an earphone, which comprises the waterproof connection structure described above.

[0080] like Figure 13 As shown, the earphone includes multiple functional devices and a cable assembly connected between two functional devices. The functional device includes a shell 1, and at least two functional devices are connected using the above-mentioned waterproof connection structure.

[0081] Specifically, the earphones include a battery compartment 30, a control compartment 31 and two earphone heads 32 (all of which are functional devices). The battery compartment 30 and the control compartment 31, the battery compartment 30 and the earphone head 32, and the control compartment 31 and the other earphone head 32 are connected by the cable assembly 2 described above.

[0082] For example, the battery compartment 30 and the control compartment 31 include the housing 1 described above, and the two can be connected via the cable assembly 2 described above, using the waterproof connection structure described above.

[0083] For example, the battery compartment 30 and one of the earphone heads 32 include the housing 1 described above, and the two can be connected via the cable assembly 2 described above, using the waterproof connection structure described above.

[0084] For example, the control compartment 31 and one of the earphone heads 32 include the shell 1 described above, and the two can be connected through the cable assembly 2 described above, using the waterproof connection structure described above.

[0085] For example, the battery compartment 30, the control compartment 31 and the earphone head 32 all include a shell 1, and the battery compartment 30 and the control compartment 31, the battery compartment 30 and the earphone head 32, and the control compartment 31 and the other earphone head 32 are all connected by a cable assembly 2, so that the sealing effect of the connection between each part and the cable assembly 2 is better.

[0086] By providing the above-mentioned waterproof connection structure, the waterproofness of the earphones can be improved to IPX8.

[0087] Optionally, the earphones are bone conduction earphones, whose earphone heads 32 are in contact with the skin of the human face, allowing the wearer to hear sounds through bone conduction.

[0088] The above is only a specific implementation of the present invention, and any other improvements made based on the concept of the present invention are considered to be within the scope of protection of the present invention.

Claims

1. A waterproof connection structure, characterized in that: include: The housing (1) is provided with a socket (10); as well as, A cable assembly (2) comprises an outer layer (20), a wire (21) passing through the outer layer (20), and a connector (22) connected to an end of the outer layer (20), wherein the connector (22) is used for plugging into the connector (10); The outer layer (20) includes a sleeve (206) and a sealing ring assembly (200), the sealing ring assembly (200) includes at least two sealing rings (201) connected to the connector (22) and a connecting piece (202) connected between two adjacent sealing rings (201), the sealing ring (201) protrudes toward the hole wall of the connector (10) relative to the connecting piece (202), the sealing ring (201) is spaced along the plug-in direction A of the connector (22) and the connector (10), and the sealing ring (201) is interference fit with the connector (10).

2. The waterproof connection structure according to claim 1, wherein: The distance D1 between two adjacent sealing rings (201) along the plugging direction A is 0.2 to 1.2 mm.

3. The waterproof connection structure according to claim 2, characterized in that: The distance D1 between two adjacent sealing rings (201) along the plugging direction A is 0.3-0.7 mm.

4. The waterproof connection structure according to claim 1, wherein: The interference amount D2 between the sealing ring (201) and the connecting hole (10) is 0.05-0.5 mm.

5. The waterproof connection structure according to claim 4, characterized in that: The interference amount D2 between the sealing ring (201) and the connecting hole (10) is 0.1 to 0.2 mm.

6. The waterproof connection structure according to claim 4, characterized in that: The ratio of the wall thickness of the portion of the housing (1) corresponding to the sealing ring (201) to the interference amount D2 is not less than 10.

7. The waterproof connection structure according to claim 1, wherein: The connector (22) is clearance-matched with the connector hole (10), and the clearance D3 between the connector (22) and the connector hole (10) is 0.05-0.5 mm.

8. The waterproof connection structure according to claim 7, wherein: The connector (22) is clearance-matched with the connector hole (10), and the clearance D3 between the connector (22) and the connector hole (10) is 0.15-0.3 mm.

9. The waterproof connection structure according to claim 1, wherein: The width W2 of the sealing ring (201) is 0.1 to 1.5 mm.

10. The waterproof connection structure according to claim 9, characterized in that: The width W2 of the sealing ring (201) is 0.5-0.8 mm.

11. The waterproof connection structure according to claim 1, wherein: When viewed along the plugging direction A, the outer contour of the sealing ring (201) is non-circular, and the length L1 of the sealing ring (201) is 3 to 10 mm, and the width W1 is 1 to 10 mm.

12. The waterproof connection structure according to claim 1, wherein: The sealing ring assembly (200) is at least partially embedded in the connector (22), and the maximum embedding depth D4 of the sealing ring assembly (200) in the connector (22) is not less than 0.1 mm.

13. The waterproof connection structure according to claim 1, wherein: The connecting piece (202) is annular, and a space (205) for accommodating glue is formed between two adjacent sealing rings (201) and the connecting piece (202).

14. The waterproof connection structure according to claim 13, wherein: The connector (22) is provided with an annular groove (220), and the sealing ring assembly (200) is matched with the annular groove (220).

15. The waterproof connection structure according to claim 14, wherein: The bottom of the annular groove (220) includes a first part (2201) and a second part (2202) arranged along the plug-in direction A. The first part (2201) and the second part (2202) both include at least one convex portion (2203) and at least one concave portion (2204) arranged along the circumference of the annular groove (220). The convex portion (2203) and the concave portion (2204) are arranged in sequence, and in the plug-in direction A, the convex portion (2203) of the first part (2201) and the concave portion (2204) of the second part (2202) are arranged correspondingly, and the concave portion (2204) of the first part (2201) and the convex portion (2203) of the second part (2202) are arranged correspondingly. The sealing ring assembly (200) includes an embedded portion (203) filled in the concave portion (2204).

16. The waterproof connection structure according to claim 14, wherein: The sealing ring assembly (200) and the sleeve (206) are spaced apart along the plugging direction A; the outer skin (20) further comprises at least one connecting rib (204) connected between the sealing ring assembly (200) and the sleeve (206); the connector (22) is provided with a mounting groove (221) adapted to the connecting rib (204); and the mounting groove (221) is communicated with the annular groove (220).

17. The waterproof connection structure according to claim 16, wherein: The bottom of the installation groove (221) is provided with a protrusion (2210), and the connecting rib (204) is provided with a recess (2040) adapted to the protrusion (2210).

18. The waterproof connection structure according to any one of claims 1 to 17, characterized in that: The outer skin layer (20) is injection-molded on the connector (22).

19. The waterproof connection structure according to any one of claims 1 to 17, characterized in that: The connector (22) is provided with an end face disposed away from the sleeve (206) and at least one hook (223) protruding from the end face, the hook (223) being used for engaging with the housing (1), and a distance L2 between the sealing ring assembly (200) and the end face along the plugging direction A is 0.05 to 2 mm.

20. The waterproof connection structure according to any one of claims 1 to 17, characterized in that: A distance L3 along the plugging direction A between the sealing ring assembly (200) and the end surface of the sleeve (206) facing the housing (1) is 0.5 to 3 mm.

21. The waterproof connection structure according to any one of claims 1 to 17, characterized in that: The sleeve (206) and the sealing ring assembly (200) are not connected; or, the outer skin (20) is integrally formed, and the sealing ring assembly (200) is connected to the sleeve (206).

22. The waterproof connection structure according to any one of claims 1 to 17, characterized in that: The number of the sealing rings (201) is two.

23. A headset, characterized in that: Comprising the waterproof connection structure according to any one of claims 1 to 22.

24. The earphone according to claim 23, wherein The earphones comprise a battery compartment (30), a control compartment (31) and two earphone heads (32); one, two or all of the battery compartment (30) and the control compartment (31), the battery compartment (30) and the earphone heads (32), and the control compartment (31) and the earphone heads (32) are connected via the cable assembly (2).

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