Waterproof earphone seat connector and mobile terminal
Patent Information
- Application Number
- CN202522139364.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-10
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-10-10
AI Technical Summary
[0004]本实用新型的目的在于提供一种防水耳机座连接器及移动终端，旨在解决现有防水耳机座连接器在SMT贴片高温焊接过程中因高温导致防水密封性能下降或失效的问题
[0015]本实用新型提供了一种防水耳机座连接座，该防水耳机座连接座通过将端子的焊接部内置于绝缘主体内部，有效避免了传统外露焊脚易受损的问题，通过将柔性电路板直接密封绝缘主体开口并替代传统塑胶后塞，简化了结构设计，降低了组装复杂度与成本，并在柔性电路板外侧设置包含底盖与密封层的防水密封件，实现了多重密封保护，防水密封件的底盖与密封层组合设计，能有效密封柔性电路板与底盖的装配间隙，密封层无需再受回流焊高温，彻底杜绝高温烧胶导致的气密NG，从而有效提高了生产效率并降低了生产损耗。
Smart Images
Figure CN224790034U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of headphone connector technology, and in particular relates to a waterproof headphone connector and a mobile terminal. Background Technology
[0002] As the consumer electronics market continues to demand higher product reliability, high-end mobile phones have generally incorporated waterproofing as a core feature. As an important component of the external interface of a mobile phone, the reliability and stability of the waterproof design of the headphone jack connector are of paramount importance.
[0003] While current waterproof headphone sockets employ various sealing structures (such as sealing rings and waterproof adhesives) to achieve basic waterproofing, they commonly face waterproofing failure issues caused by high-temperature performance during SMT (Surface Mount Technology) assembly at the client's location. The SMT assembly process requires soldering at temperatures exceeding 200°C, and the waterproof adhesives used in existing waterproof headphone sockets are prone to softening, deformation, or peeling from the substrate under high temperatures. This leads to subsequent waterproofing tests showing leakage and reduced sealing performance, resulting in non-compliant (NG) results. Utility Model Content
[0004] The purpose of this utility model is to provide a waterproof headphone connector and a mobile terminal, which aims to solve the problem that the waterproof sealing performance of existing waterproof headphone connectors is reduced or fails due to high temperature during the SMT surface mount high temperature soldering process.
[0005] In a first aspect, a waterproof headphone socket connector, the waterproof headphone socket connector comprising: An insulating body, the insulating body including a plug slot for inserting an earphone plug, a receiving slot communicating with the plug slot, and an opening at the bottom of the insulating body communicating with the receiving slot; The terminal is embedded in the receiving groove and partially extends into the plug groove to be electrically connected to the headphone plug. The terminal includes a fixing part, an elastic part formed by bending from one end of the fixing part, a connecting part that extends integrally with the elastic part, and a welding part located at the end of the fixing part. A flexible circuit board, which covers and is fixed to the rear end face of the insulating body, is used to seal the opening, and is electrically connected to the solder part of the terminal; A waterproof seal is attached to the outside of the flexible circuit board and includes a bottom cover and a sealing layer. The sealing layer is sandwiched between the bottom cover and the flexible circuit board to seal the assembly gap between the flexible circuit board and the bottom cover.
[0006] In some embodiments, an electrical contact point is provided on the outer side of the connector, and the electrical contact point extends into the plug groove for contacting the headphone plug to achieve electrical connection.
[0007] In some embodiments, the flexible circuit board has a plurality of welding holes spaced apart on both sides, and each welding hole corresponds to a welding part, which is used to allow the welding part to pass through and be fixed by welding during assembly.
[0008] In some embodiments, the sealing layer is formed after the welding portion of the terminal is welded to the flexible circuit board.
[0009] In some embodiments, the sealing layer is applied and cured around the welding area of the welding hole and the welding part by a dispensing process, and at the same time covers the outer surface of the flexible circuit board.
[0010] In some embodiments, the insulating body further includes a retaining block disposed within the receiving groove, the retaining block being integrally formed on the inner wall of the receiving groove, for providing guidance and positioning of the terminal during insertion.
[0011] In some embodiments, the rear end face of the insulating body is provided with a mounting groove, which surrounds the outer periphery of the opening and is adapted to the edge of the flexible circuit board for accommodating and positioning the flexible circuit board.
[0012] In some embodiments, the top surface of the insulating body is further provided with a sealing groove, the sealing groove including an annular groove and a fixing groove extending outward from the diagonal position of the annular groove, the fixing groove being connected to the annular groove.
[0013] In some embodiments, a waterproof sealing ring is further included, the waterproof sealing ring including an inner sealing portion, an outer sealing portion and a retaining portion connected to the inner sealing portion, the inner sealing portion and the outer sealing portion being embedded in the annular groove, and the retaining portion being retained in the fixing groove.
[0014] Secondly, this utility model provides a mobile terminal, which includes the waterproof headphone connector described above.
[0015] This utility model provides a waterproof headphone socket connector. By embedding the soldering part of the terminal inside the insulating body, the waterproof headphone socket connector effectively avoids the problem of easy damage to the traditional exposed solder feet. By directly sealing the opening of the insulating body with a flexible circuit board and replacing the traditional plastic back plug, the structural design is simplified, and the assembly complexity and cost are reduced. A waterproof sealant including a bottom cover and a sealing layer is set on the outside of the flexible circuit board, realizing multiple sealing protection. The combination design of the bottom cover and sealing layer of the waterproof sealant can effectively seal the assembly gap between the flexible circuit board and the bottom cover. The sealing layer no longer needs to be subjected to the high temperature of reflow soldering, completely eliminating the airtightness failure caused by high temperature burning of glue, thereby effectively improving production efficiency and reducing production losses. Attached Figure Description
[0016] Figure 1 This is a perspective view of the waterproof headphone socket connector and headphone plug provided by this utility model; Figure 2 This is an exploded view of the waterproof headphone socket connector and headphone plug provided by this utility model; Figure 3 This is a schematic diagram of the insulating body provided by this utility model; Figure 4 This is another schematic diagram of the insulating body provided by this utility model; Figure 5 This is a schematic diagram of the terminal provided by this utility model; Figure 6 This is a schematic diagram of the sealing ring provided by this utility model; Figure 7 This is a schematic diagram showing the completed assembly of the terminal and the insulating body provided by this utility model; Figure 8 This is a schematic diagram showing the completed assembly of the flexible circuit board, terminals, and insulating body provided by this utility model; Figure 9 This is a schematic diagram of the assembled waterproof headphone connector provided by this utility model. Detailed Implementation
[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0018] It should be noted that the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to direct setup or connection, or indirect setup or connection through centered components or centered structures.
[0019] Furthermore, in embodiments of this utility model, terms such as "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are used to indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, or in a conventional placement or usage state. These terms are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the structure, feature, device, or element referred to must have a specific orientation or positional relationship, nor that it must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, unless otherwise stated, "multiple" means two or more.
[0020] The various specific technical features and embodiments described in the detailed embodiments can be combined in any suitable manner without contradiction. For example, different implementation methods can be formed by combining different specific technical features / embodiments. In order to avoid unnecessary repetition, the various possible combinations of the various specific technical features / embodiments in this utility model will not be described separately.
[0021] Please refer to the following: Figures 1 to 6 This utility model provides a waterproof headphone connector 100, which includes an insulating body 10, terminals 20, a flexible circuit board 30, and a waterproof seal 40. The insulating body 10 includes a insertion groove 11 for inserting a headphone plug 200, a receiving groove 12 communicating with the insertion groove 11, and an opening 13 at the bottom of the insulating body 10 communicating with the receiving groove 12. The terminals 20 are embedded in the receiving groove 12 and partially extend into the insertion groove 12 for electrical connection with the headphone plug 200. The terminals 20 include a fixing part 21. An elastic portion 22 is formed by bending one end of the fixing portion 21, a connecting portion 23 extends integrally with the elastic portion 22, and a welding portion 24 is located at the end of the fixing portion 21; a flexible circuit board 30 covers and is fixed to the rear end face of the insulating body 10 to seal the opening 13 and is electrically connected to the welding portion 24 of the terminal 20; a waterproof seal 40 is attached to the outside of the flexible circuit board 30, including a bottom cover 41 and a sealing layer 42, the sealing layer 42 being sandwiched between the bottom cover 41 and the flexible circuit board 30 to seal the assembly gap between the flexible circuit board 30 and the bottom cover 41. The waterproof headphone connector 100 of this utility model directly seals the bottom opening 13 of the insulating body 10 through the flexible circuit board 30, and forms a double waterproof structure with the bottom cover 41 and the sealing layer 42, while optimizing the connection method between the terminal 20 and the flexible circuit board 30, effectively improving the waterproof sealing performance and electrical connection stability of the waterproof headphone connector 100.
[0022] Please refer to the following: Figures 3 to 4In some embodiments, the insulating body 10 is a rectangular shell shape, integrally injection molded. The insulating body 10 includes a plug groove 11, a receiving groove 12, and an opening 13. The plug groove 11 extends along the length of the insulating body 10 and penetrates into the interior of the insulating body 10. The receiving groove 12 is disposed on both sides of the plug groove 11 and communicates with the plug groove 11. The opening 13 is opened at the bottom position of the receiving groove 12, and the size of the groove matches the coverage area of the flexible circuit board 30. The outer wall of the insulating body 10 is also provided with positioning protrusions or snap-fit structures for positioning and assembly, ensuring that the insulating body 10 can be installed firmly and is not easily displaced.
[0023] In some embodiments, the insulating body 10 further includes a locking block 14 disposed within the receiving groove 10. The locking block 14 is integrally formed on the inner wall of the receiving groove 10 and is used to provide guidance and position the terminal 20 during insertion. Specifically, the locking block 14 protrudes from the inner wall of the receiving groove 12 toward the center of the groove. The surface of the locking block 14 is provided with a guide slope. During the assembly process of inserting the terminal 20 into the receiving groove 12, the guide slope of the locking block 14 can provide initial guidance for the terminal 20. When the terminal 20 is installed in place, the vertical limiting surface of the locking block 14 fits tightly with the structure of the terminal 20, restricting the forward and backward and left and right movement of the terminal 20, thereby achieving precise positioning.
[0024] In some embodiments, the rear end face of the insulating body 10 is provided with a mounting groove 15. The mounting groove 15 surrounds the outer periphery of the opening 13 and is adapted to the edge of the flexible circuit board 30 for accommodating and positioning the flexible circuit board 30. Specifically, the mounting groove 15 is machined around the outer periphery of the opening 13, and its outline dimensions are adapted to the edge shape of the flexible circuit board 30. The depth of the mounting groove 15 is slightly greater than the thickness of the flexible circuit board 30. During assembly, the flexible circuit board 30 is accommodated in the mounting groove 15, and the groove wall forms an effective circumferential limit for it, thereby achieving the initial positioning and fixation of the flexible circuit board 30, effectively preventing the flexible circuit board 30 from being misaligned or moved in subsequent operations, thereby improving the sealing reliability and consistency of the waterproof headphone connector 100.
[0025] In some embodiments, the top surface of the insulating body 10 is further provided with a sealing groove 16. The sealing groove 16 includes an annular groove 161 and fixing grooves 162 extending outward from the diagonal positions of the annular groove 161. The fixing grooves 162 are connected to the annular groove 161. The annular groove 161 is semi-enclosed and surrounds the outer periphery of the rear end of the insertion groove 11. The two fixing grooves 162 are independently arranged and start from two diagonal positions of the outer wall of the annular groove 161, extending away from the center of the groove. One extends in the radial direction and the other extends in the transverse direction, eventually forming a connected, integrally formed groove structure with the annular groove 161.
[0026] In some embodiments, the bottom surface of the insulating body 10 is provided with a notch 17, the width of which matches a specific local area of the flexible circuit board 30, allowing the tail portion of the flexible circuit board 30 to pass through it. When the flexible circuit board 30 is installed in place, the main body portion of the flexible circuit board 30 covers and seals the rear opening of the insulating body 10, while the connecting tail end is led out to the outside through the notch 17.
[0027] In some embodiments, the receiving slot 12 includes a first receiving slot 12a, a second receiving slot 12b, a third receiving slot 12c, a fourth receiving slot 12d, and a fifth receiving slot 12e. The first receiving slot 12a and the second receiving slot 12b are located on the left side of the plug-in slot 11 and are separated from each other by a partition boss. The third receiving slot 12c, the fourth receiving slot 12d, and the fifth receiving slot 12e are located on the right side of the plug-in slot 11 and are also separated from each other by partition bosses. Adjacent receiving slots are isolated from each other by integrally formed partition bosses 18 to prevent the terminals 20 from shifting. Each receiving slot has an opening on its side facing the plug-in slot 11, thereby maintaining communication with the plug-in slot 11, allowing the terminal 20 received therein to extend into the plug-in slot and contact the headphone plug 200 to establish an electrical connection.
[0028] Please refer to the following: Figure 5 In some embodiments, terminal 20 includes a first terminal 20a, a second terminal 20b, a third terminal 20c, a fourth terminal 20d, and a fifth terminal 20e. The first terminal 20a is embedded in the first receiving groove 12a, the second terminal 20b is embedded in the second receiving groove 12b, and the third terminal 20c, fourth terminal 20d, and fifth terminal 20e are respectively embedded in the third receiving groove 12c, fourth receiving groove 12d, and fifth receiving groove 12e. The connecting end of the second terminal 20b extends from the front opening of the insertion groove 11, forming a guide contact structure. The soldering portions of each terminal extend towards the opening 13 at the bottom of the insulating body 10 and are soldered to the flexible circuit board 30.
[0029] In some embodiments, an electrical contact point 231 is provided on the outer side of the connecting portion 23, the electrical contact point 231 extending into the insertion slot 11 for contacting the headphone plug 200 to achieve electrical connection. The contact surface of the electrical contact point 231 is designed as a hemispherical protrusion, which can provide a smooth guiding effect when the headphone plug 200 is inserted, and effectively reduce frictional resistance and material wear during the insertion process.
[0030] In some embodiments, a plurality of welding holes 31 are provided at intervals on both sides of the flexible circuit board 30. Each welding hole 31 corresponds to a welding part 24 and is used to allow the welding part 24 to pass through and be fixed by welding during assembly. Specifically, the welding holes 31 are circular through-hole structures, arranged along the length of the flexible circuit board 30 at specific intervals on both sides of the flexible circuit board 30. The diameter of the welding holes 31 is slightly larger than the size of the terminal welding parts 24 to ensure that the welding parts 24 can pass through smoothly, thereby achieving preliminary accurate positioning between the flexible circuit board 30 and the insulating body 10, and completing a firm mechanical anchoring and reliable electrical connection.
[0031] In some embodiments, the waterproof seal 40 has an overall U-shaped structure, including a bottom cover 41 and a sealing layer 42. The sealing layer 42 is sandwiched between the bottom cover 41 and the flexible circuit board 30. The open end of the waterproof seal 40 faces the opening 13 of the insulating body 10, and can fully cover the main sealing area of the flexible circuit board 30.
[0032] In some embodiments, the sealing layer 42 is formed after the soldering of the terminal 20 to the flexible circuit board 30 is completed, thereby ensuring that the solder joint can undergo the high temperature environment without hindrance during SMT reflow soldering, while the sealing layer 42 completely avoids high temperature thermal shock, fundamentally preventing sealing failure caused by high temperature aging and performance degradation of the sealing material.
[0033] In some embodiments, the sealing layer 42 is applied and cured around the welding area of the welding hole 31 and the welding part 24 using a dispensing process, while simultaneously covering the outer surface of the flexible circuit board 30. Specifically, the dispensing process is first used to precisely cover the joint area of the welding hole 31 and the welding part 24 for local encapsulation, and then the adhesive is applied to cover the entire outer surface of the flexible circuit board 30, forming a continuous closed protective layer along the outer surface of the flexible circuit board 30, thus creating a multi-layer sealing barrier. After the sealing layer 42 is cured (through UV light or heat curing process), it forms a strong adhesive interface with the welding area and the surface of the flexible circuit board 30, which can not only prevent moisture from penetrating through the micro-gap between the welding hole 31 and the welding part 24, but also prevent liquid from entering the internal electrical connection area through the assembly gap between the flexible circuit board 30 and the insulating body 10, significantly improving the overall waterproof reliability of the connector.
[0034] Please refer to the following: Figure 6In some embodiments, the waterproof headphone connector 100 further includes a waterproof sealing ring 50, which includes an inner sealing portion 51, an outer sealing portion 52, and a retaining portion 53 connected to the inner sealing portion 51. The inner sealing portion 51 and the outer sealing portion 52 are embedded in the annular groove 161, and the retaining portion 53 is retained in the fixing groove 162. The cooperation between the retaining portion 53 and the fixing groove 162 not only restricts the displacement of the sealing ring in the axial and lateral directions respectively, but also effectively prevents the waterproof headphone connector 100 from rotating or loosening due to the rotation and insertion / removal of the headphone plug 200 during use.
[0035] This utility model provides a waterproof headphone socket connector. By embedding the welding part of the terminal inside the insulating body, the waterproof headphone socket connector effectively avoids the problem of easy damage to the traditional exposed solder feet. By directly sealing the opening of the insulating body with a flexible circuit board and replacing the traditional plastic back plug, the structural design is simplified, and the assembly complexity and cost are reduced. A waterproof sealing element including a bottom cover and a sealing layer is set on the outside of the flexible circuit board, realizing multiple sealing protection. The combination design of the bottom cover and sealing layer of the waterproof sealing element can effectively seal the assembly gap between the flexible circuit board and the bottom cover. By placing the welding process before the final seal is formed by dispensing, the sealing layer does not need to be subjected to the high temperature of reflow soldering, completely eliminating the airtightness failure caused by high temperature burning of glue, thereby effectively improving production efficiency and reducing production losses.
[0036] Please refer to the following: Figures 7 to 9 In some embodiments, the assembly steps of the waterproof headphone connector 100 include: Terminal assembly: A set of independent terminals 20 are respectively embedded into the respective receiving slots 12 of the insulating body 10. The terminals are guided and positioned by the locking blocks 14 and the partition bosses in the receiving slots, ensuring that the connection part 23 and the electrical contact point 231 of the terminal extend into the predetermined position in the insertion slot 11. The soldering part 24 extends towards the opening 13 at the bottom of the insulating body and is aligned.
[0037] Flexible circuit board soldering: Align the flexible circuit board 30 with and cover the rear end face of the insulating body 10, allowing its edges to be accommodated within the mounting groove 15 for initial positioning. Simultaneously, ensure that the soldering portions 24 of each terminal pass through the corresponding soldering holes 31 on the flexible circuit board 30. Then, complete the electrical connection and mechanical fixation using an SMT reflow soldering process. At the same time, the flexible circuit board 30 seals the opening 13 at the bottom of the insulating body 10, initially forming a seal for the opening 13. After soldering, clean the solder pad area to remove residual flux. Rear-end sealing and encapsulation: After welding and cleaning, sealant is applied to the welding area and the entire outer surface of the flexible circuit board 30 using an adhesive dispensing process to form a sealing layer 42. The bottom cover 41 is then pressed onto the sealing layer 42, filling all gaps and ensuring complete waterproofing of the welding area and the flexible circuit board surface. After the sealant cures, it, together with the bottom cover 41, forms a U-shaped waterproof seal 40, achieving multiple reliable seals at the rear end.
[0038] Front sealing ring installation: Finally, press the waterproof sealing ring 50 into the sealing groove 16 of the front opening of the insulating body 10, so that the inner sealing part 51 and the outer sealing part 52 of the waterproof sealing ring 50 are embedded in the annular groove 161 on the top surface of the insulating body, and at the same time, the retaining part 53 is correspondingly snapped into the fixing groove 162, thus forming a finished waterproof headphone connector 100 with multiple sealing structures.
[0039] This utility model also provides a mobile terminal, which includes the waterproof headphone connector 100 as described above. The mobile terminal can be a portable electronic device, such as, but not limited to, a mobile phone, tablet computer, laptop computer, portable media player, smart wearable device, etc.
[0040] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A waterproof headphone connector, characterized in that, The waterproof headphone connector includes: An insulating body, the insulating body including a plug slot for inserting an earphone plug, a receiving slot communicating with the plug slot, and an opening at the bottom of the insulating body communicating with the receiving slot; The terminal is embedded in the receiving groove and partially extends into the plug groove to be electrically connected to the headphone plug. The terminal includes a fixing part, an elastic part formed by bending from one end of the fixing part, a connecting part that extends integrally with the elastic part, and a welding part located at the end of the fixing part. A flexible circuit board, which covers and is fixed to the rear end face of the insulating body, is used to seal the opening, and is electrically connected to the solder part of the terminal; A waterproof seal is attached to the outside of the flexible circuit board and includes a bottom cover and a sealing layer. The sealing layer is sandwiched between the bottom cover and the flexible circuit board to seal the assembly gap between the flexible circuit board and the bottom cover.
2. The waterproof headphone connector as described in claim 1, characterized in that, An electrical contact point is provided on the outer side of the connector, and the electrical contact point extends into the plug groove for contacting the headphone plug to achieve electrical connection.
3. The waterproof headphone connector as described in claim 1, characterized in that, The flexible circuit board has several welding holes spaced apart on both sides. Each welding hole corresponds to a welding part, which is used to allow the welding part to pass through and be fixed by welding during assembly.
4. The waterproof headphone connector as described in claim 3, characterized in that, The sealing layer is formed after the welding of the terminal to the flexible circuit board is completed.
5. The waterproof headphone connector as described in claim 4, characterized in that, The sealing layer is applied and cured around the welding area of the welding hole and the welding part by a dispensing process, and at the same time covers the outer surface of the flexible circuit board.
6. The waterproof headphone connector as described in claim 1, characterized in that, The insulating body also includes a locking block disposed within the receiving groove. The locking block is integrally formed on the inner wall of the receiving groove and is used to provide guidance and position the terminal during insertion.
7. The waterproof headphone connector as described in claim 1, characterized in that, The rear end face of the insulating body is provided with a mounting groove, which surrounds the outer periphery of the opening and is adapted to the edge of the flexible circuit board for accommodating and positioning the flexible circuit board.
8. The waterproof headphone connector as described in claim 1, characterized in that, The top surface of the insulating body is also provided with a sealing groove, which includes an annular groove and a fixing groove extending outward from the diagonal position of the annular groove. The fixing groove is connected to the annular groove.
9. The waterproof headphone connector as described in claim 8, characterized in that, It also includes a waterproof sealing ring, which includes an inner sealing part, an outer sealing part, and a retaining part connected to the inner sealing part. The inner sealing part and the outer sealing part are embedded in the annular groove, and the retaining part is retained in the fixing groove.
10. A mobile terminal, characterized in that, Includes the waterproof headphone connector as described in any one of claims 1-9.