Charging structure and wireless earphones
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- LUXSHARE PRECISION ACCESSORY SUZHOU LTD
- Filing Date
- 2025-05-08
- Publication Date
- 2026-05-21
AI Technical Summary
Conventional wireless earphone charging structures suffer from poor welding stability and low yield due to point-to-point or point-to-surface contact between terminals and connection wires, leading to difficulty in positioning and increased production costs.
A charging structure with insulating bodies and charging terminals featuring welded protrusions and collars, along with a flux system, ensures stable positioning and high welding accuracy by supporting the connecting members before welding, and includes an insulating sheath to prevent short circuits.
The solution provides easy and stable welding, enhances welding accuracy, reduces production costs, and improves the overall structural integrity of the wireless earphone charging system.
Smart Images
Figure 2026084641000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of charging of wireless earphones, and particularly to a charging structure and a wireless earphone.
Background Art
[0002] An earphone is an audio conversion unit that receives an electrical signal transmitted from a media player or a receiver and converts it into a sound wave that can be heard using a speaker close to the ear. For ease of carrying and use, wireless earphones have gradually become the mainstream choice of people.
[0003] A wireless earphone forms a signal transmission path by a wireless communication protocol and usually needs to be used together with a charging case. The charging stand structure of a conventional wireless earphone is provided at the bottom end of the wireless earphone, and the terminals of the charging structure need to be welded to a connection wire so as to be connected to the positive and negative electrodes of the battery cell. However, between the conventional terminal and the connection wire, there is a point-to-point contact by one end of the connection wire and one end of the terminal, or a point-to-surface contact by one end of the connection wire and one surface of the terminal, and the stability of its welding is poor and the yield is low.
Summary of the Invention
Problems to be Solved by the Invention
[0004] An object of the present invention is to provide a charging structure and a wireless earphone that are easy to position by welding and have high welding stability.
Means for Solving the Problems
[0005] To achieve this object, the present invention provides [[ID=**34**]] an insulating body having a receiving groove on its top surface into which one end of a battery cell is inserted, and two charging terminals each provided in the insulating body and having a contact portion and a welding projection exposed outside the insulating body. This technical embodiment employs a charging structure comprising two connecting members, each having a connecting segment connected to the positive and negative electrodes of the battery cell, and a collar having a welding hole, which is fitted into the corresponding welding protrusion through the welding hole and welded in place.
[0006] In a preferred embodiment of the above charging structure, the charging structure further comprises a flux fitted into the welded protrusion and fixedly connected to the collar.
[0007] In a preferred embodiment of the above charging structure, the connecting member further comprises an insulating sheath covering the connecting segment and the collar, with position-regulating holes provided therein, the welding holes being located within the position-regulating holes, and the flux being located within the position-regulating holes and fixedly connected to the collar.
[0008] In a preferred embodiment of the above charging structure, a portion of the projection of the weld is located outside the weld hole, along the direction in which the weld protrusion is inserted into the weld hole.
[0009] In a preferred embodiment of the above charging structure, the contact portion is provided with a plurality of protrusions that are engaged and fixed to the insulating body.
[0010] In a preferred embodiment of the above charging structure, the welded portion is provided with fixing holes, and the insulating body is provided with fixing protrusions that are inserted into the fixing holes to fix the welded portion.
[0011] In a preferred embodiment of the above charging structure, the charging terminal further comprises connecting portions, each of which is connected to the contact portion and the welded portion, respectively, and the connecting portions comprises a plurality of connecting subsegments that are sequentially connected and arranged so that two adjacent subsegments form a narrow angle.
[0012] In a preferred embodiment of the above charging structure, the contact portion is provided with an engagement groove, and the insulating body is provided with an engagement portion that engages with the engagement groove.
[0013] In a preferred embodiment of the above charging structure, the connection position between the connecting portion and the contact portion is located within the engagement groove.
[0014] The wireless earphones further include a case, a battery cell, and a speaker, the case having the charging structure described above, the case having a sound outlet and a connection hole that is closed by the charging structure, the speaker and the battery cell are provided inside the case, the speaker is electrically connected to the battery cell and can reproduce sound through the sound outlet. [Effects of the Invention]
[0015] The beneficial effects of the present invention are as follows: The present invention provides a charging structure and wireless earphones. In this charging structure, since both charging terminals have welded protrusions, the collar of the connecting member can be fitted onto the corresponding welded protrusion before welding. At this time, the welded protrusions can support and position the connecting member with the collar, thereby ensuring that the relative position between the charging terminal and the connecting member is stable. Furthermore, a structure for fixing the relative position between the charging terminal and the connecting member is omitted, making positioning by welding easy and the welding stability high. [Brief explanation of the drawing]
[0016] [Figure 1] This is a schematic diagram of the charging structure according to the present invention. [Figure 2] This is an exploded view of the charging structure according to the present invention. [Figure 3] This is a schematic diagram of the structure of the charging terminal and connecting member according to the present invention. [Figure 4] This is a schematic diagram of the structure of the insulating body according to the present invention. [Figure 5] This is a cross-sectional view of the charging terminal and connecting member according to the present invention. [Figure 6] This is a schematic diagram of the structure of the charging terminal according to the present invention. [Modes for carrying out the invention]
[0017] Hereinafter, embodiments of the present invention will be described in detail. Examples of the embodiments are shown in the drawings, in which the same or similar reference numerals from the beginning to the end indicate the same or similar elements, or elements having the same or similar functions. The embodiments described below by referring to the drawings are illustrative only and are merely for interpreting the present invention and should not be construed as limiting the present invention.
[0018] In the description of the present invention, still, the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for facilitating the description of the present invention and simplifying the description, and does not indicate or imply that the mentioned device or element must have a specific orientation and be configured and operated in a specific orientation. Therefore, it should not be construed as limiting the present invention. Also, the terms "first" and "second" are merely for description and should not be construed as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.
[0019] Unless otherwise clearly specified and limited, the terms "attach", "connect", "join", "fix" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or a relationship of internal communication between two elements or an interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to specific situations.
[0020] Unless otherwise clearly specified or limited, the fact that the first feature is "above" or "below" the second feature may include that the first feature and the second feature are in direct contact, or may include that the first feature and the second feature are not in direct contact and are in contact through other features therebetween. Further, the fact that the first feature is "above", "upward" and "upper surface" of the second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the horizontal height of the first feature is higher than that of the second feature. The fact that the first feature is "below", "downward" and "lower surface" of the second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the horizontal height of the first feature is lower than that of the second feature.
[0021] Hereinafter, in connection with the drawings, the technical aspects of the present invention will be further described with specific embodiments.
[0022] An earphone is an audio conversion unit that receives an electrical signal transmitted from a media player or a receiver and converts it into a sound wave that can be heard using a speaker close to the ear. In order to facilitate carrying and use, wireless earphones have gradually become the mainstream choice of people. A wireless earphone forms a signal transmission path by a wireless communication protocol. In order to ensure the power supply of the wireless earphone, a battery cell is provided inside the wireless earphone. Therefore, the wireless earphone usually needs to be used together with a charging case as a set.
[0023] This embodiment provides a wireless earphone, which includes a charging structure, a case, and a speaker. The case is provided with a sound outlet hole and a connection hole. The connection hole is closed by the charging structure. The speaker and the battery cell are provided inside the case. The speaker is electrically connected to the battery cell and can reproduce sound through the sound outlet hole. In order to enable the wireless earphone to receive an electrical signal transmitted from a media player, a wireless module is further provided inside the case. The battery cell can supply power to the wireless module and the speaker to ensure their normal operation.
[0024] In this embodiment, the wireless earphone further comprises a microphone, which is located inside the case and electrically connected to a battery cell, thereby giving the wireless earphone the function of receiving sound.
[0025] As shown in Figure 1, in this embodiment, the connection hole in the case is located at the bottom end, meaning the charging structure is provided at the bottom end of the wireless earphone, and the battery cell 2 has a long structure, so the positive and negative electrodes of the battery cell 2 are close to the microphone, speaker, and wireless module at the front of the case. Therefore, the terminals of the charging structure need to be welded to the connecting wires so as to connect to the positive and negative electrodes of the battery cell 2. However, because the relative position between the terminals and the connecting wires is difficult to fix, the welding accuracy is low, the welding efficiency is low, and the production cost is high.
[0026] As shown in Figures 1 to 3, in order to solve the above problem, this embodiment provides a charging structure comprising an insulating body 1, two charging terminals 3, and two connecting members 4. Both charging terminals 3 are provided inside the insulating body 1, and each charging terminal 3 has a contact portion 31 and a welded portion 32. The contact portion 31 is located outside the insulating body 1, and a welded protrusion 33 is provided on the welded portion 32. The connecting member 4 comprises a connecting segment 41 and a collar 42, and a welded hole 421 is provided on the collar 42. The collars 42 of the two connecting members 4 are each fitted into the corresponding welded protrusions 33 through the welded holes 421 and welded and fixed, and the connecting segments 41 of the two connecting members 4 are connected to the positive and negative electrodes of the battery cell 2, respectively.
[0027] In this charging structure, since both charging terminals 3 have welded protrusions 33, the collar 42 of the connecting member 4 can be fitted onto the corresponding welded protrusions 33 before welding. At this time, the welded protrusions 33 can support and position the connecting member 4 with the collar 42, thereby ensuring that the relative position between the charging terminals 3 and the connecting member 4 is stable. Furthermore, a structure for fixing the relative position between the charging terminals 3 and the connecting member 4 is omitted, improving welding accuracy, increasing welding efficiency, and lowering costs.
[0028] Furthermore, if the speaker of the wireless earphone is positioned at the top and the microphone is positioned at the bottom, the welded protrusion 33 is provided facing upward, and the collar 42 of the connecting member 4 is fitted onto the welded protrusion 33 along the direction from top to bottom. In this case, the welded protrusion 33 can support the collar 42 before welding it, thereby ensuring the stability of the relative position between the welded protrusion 33 and the collar 42, making positioning by welding easy, and the size of the gap between the two is appropriate, resulting in high welding stability.
[0029] A housing groove 11 is provided on the top surface of the insulating body 1, and one end of the battery cell 2 is inserted into the housing groove 11. The housing groove 11 positions the battery cell 2, ensuring its stability within the case and reducing the possibility of damage to the battery cell 2 when the wireless earphone is dropped.
[0030] As shown in Figure 4, the sidewall 14 of the housing groove 11 surrounded by the insulating body 1 comprises a base ring 141 and side walls 142, and the two side walls 142 are spaced apart to form two recessed grooves 143, the welded protrusions 33 of the two charging terminals 3 are each provided in one of the recessed grooves 143, and the collar 42 of the connecting member 4 is also provided in the recessed groove 143. The structure of the insulating body 1 can provide space for the connection between the collar 42 and the welded protrusions 33.
[0031] As shown in Figure 2, the charging structure further includes a support block 6, which is provided within the housing groove 11. A clamp inclined surface 61 is provided on the side away from the bottom surface of the housing groove 11, and the battery cell 2 comes into contact with the clamp inclined surface 61. Driven by the clamp inclined surface 61, the battery cell 2 moves toward the side wall 142 of the housing groove 11 and is clamped by the clamp inclined surface 61 and the side wall 142 of the housing groove 11, ensuring the stability of the battery cell 2.
[0032] Furthermore, a mating bevel is provided at the bottom end of the battery cell 2, and the mating bevel slides against the clamp bevel 61.
[0033] As shown in Figures 1 and 2, the charging structure further comprises flux 5, which is fitted onto the weld protrusion 33 and fixedly connected to the collar 42. The flux 5 is used to weld and fix the weld protrusion 33 and the collar 42. After the flux 5 is melted by the welding gun, it flows between the weld protrusion 33 and the collar 42, and when the flux 5 cools and solidifies, the welding between the weld protrusion 33 and the collar 42 is completed.
[0034] Specifically, flux 5 is solder balls, and the metallic properties of tin are suitable for welding. Before welding, the solder balls should be placed in the gap between the welding protrusion 33 and the collar 42.
[0035] As shown in Figures 1 to 3, the connecting member 4 further comprises an insulating sheath 43, which covers the connecting segment 41 and the collar 42, thereby enhancing the safety of the charging structure and preventing short circuits inside the wireless earphone.
[0036] Furthermore, when the flux 5 is heated and melted, it becomes fluid and may flow to other locations, causing a shortage of flux 5 between the weld protrusion 33 and the collar 42, and potentially affecting other structures. As shown in Figure 3, to solve the above problem, a position-restricting hole 431 is provided in the insulating sheath 43, the weld hole 421 is located within the position-restricting hole 431, and the flux 5 is located within the position-restricting hole 431 and fixedly connected to the collar 42.
[0037] In other words, a position-restricting groove can be formed between the position-restricting hole 431 and the collar 42, and the welding hole 421 of the collar 42 is located entirely within the position-restricting groove. After the flux 5 is melted, surface tension exists and the distance between the welding hole 421 and the welding protrusion 33 is small, so the flux 5 does not pass through the gap between the welding hole 421 and the welding protrusion 33. Therefore, the flux 5 flows within the position-restricting groove, ensuring that the flux 5 does not flow to other locations and that the flux 5 is uniformly filled into the position-restricting groove. This ensures that the welding protrusion 33 is welded and fixed to the welding hole 421 along the circumferential direction, thereby improving the quality of the weld.
[0038] As shown in Figure 5, along the direction in which the weld protrusion 33 is inserted into the weld hole 421, a portion of the projection of the weld 32 is located outside the weld hole 421. In other words, the weld 32 cannot pass through the weld hole 421 completely, and along the circumferential direction of the accommodating groove 11, the size A of the weld 32 is larger than the size B of the weld hole 421. After the flux 5 is melted, the weld 32 can receive some of the molten flux 5, which further reduces the possibility of the flux 5 passing through the gap between the weld hole 421 and the weld protrusion 33, ensuring that all of the flux 5 cools and solidifies within the positioning groove, thereby improving the quality of the weld between the weld protrusion 33 and the collar 42.
[0039] As shown in Figures 3 to 6, the contact portion 31 is provided with multiple protrusions 35, and all of the multiple protrusions 35 are attached to and fixed to the insulating body 1. The multiple protrusions 35 can increase the contact area between the contact portion 31 and the insulating body 1, and can also increase the connection strength between the contact portion 31 and the insulating body 1 in different directions, thereby ensuring that the contact portion 31 does not detach from the insulating body 1.
[0040] Accordingly, the insulating body 1 is provided with locking grooves 15 that fit into each protrusion 35, and each protrusion 35 is inserted into the corresponding locking groove 15 to enhance the stability of the connection between the charging terminal 3 and the insulating body 1.
[0041] In this embodiment, a fixing hole 321 is provided in the welded portion 32, and the insulating body 1 is equipped with a fixing protrusion 12, which is inserted into the fixing hole 321 to fix the welded portion 32. The fixing protrusion 12 can fix the welded portion 32, thereby increasing the stability of the welded portion 32, and ensuring that the position of the welded portion 32 does not change during the process of fitting the collar 42 of the connecting member 4 onto the fixing protrusion 12 and during the process of welding them together, thereby improving the accuracy of the welding.
[0042] In this embodiment, there is no separate fixing structure between the charging terminal 3 and the insulating body 1. When the insulating body 1 is molded, the charging terminal 3 is placed in the mold for the insulating body 1, positioned, and then injection molding is performed. After the molding is complete, the charging terminal 3 and the insulating body 1 are fixed together to form an integrated structure. As shown in Figures 3 to 6, in order to further increase the connection strength between the charging terminal 3 and the insulating body 1, the charging terminal 3 is further provided with a connecting portion 34. The connecting portion 34 has multiple connecting subsegments 341 that are connected sequentially, with both ends connected to a contact portion 31 and a welded portion 32, respectively. Two adjacent connecting subsegments 341 are provided at an angle to each other.
[0043] The connection portion 34 is equipped with multiple connection subsegments 341 that are sequentially connected, and two adjacent connection subsegments 341 are arranged at an angle to each other. As a result, the connection portion 34 has a multi-stage bending structure, and when such a structure is provided inside the insulating body 1, the contact area between the connection portion 34 and the insulating body 1 is increased, and the insulating body 1 can further restrict the position of the connection portion 34 in different directions, ensuring that the connection portion 34 does not move relative to the insulating body 1, that is, the stability between the charging terminal 3 and the insulating body 1 is enhanced.
[0044] During the injection molding process, the multiple connecting subsegments 341 are embedded within the sidewall 14 of the insulating body 1. This prevents problems such as oxidation and short circuits caused by exposure of the connecting subsegments 341, increases connection strength, and ensures that the connecting portion 34 does not move relative to the insulating body 1.
[0045] In this embodiment, the contact portion 31 is provided with a locking groove 311, and the insulating body 1 is provided with a locking portion 13. The locking portion 13 is locked and fitted into the locking groove 311, and the locking portion 13 fixes the contact portion 31 by the locking groove 311, ensuring that the contact portion 31 does not move. Furthermore, after the wireless earphone is placed in the charging case, it is possible to ensure that the contact portion 31 contacts the contacts inside the charging case and charges the battery cell 2.
[0046] Furthermore, the connection point between the connection portion 34 and the contact portion 31 is located within the locking groove 311. Since the thickness of the portion of the insulating body 1 located at the locking portion 13 is greatest, it can be understood that the connection point between the connection portion 34 and the contact portion 31 is located within the locking groove 311, thereby increasing the strength of the portion of the insulating body 1 that contacts the connection portion 34.
[0047] To increase the distance between the two charging terminals 3 and improve insulation, the two charging terminals 3 are arranged symmetrically in the center along the central axis of the housing groove 11, the contact portions 31 of the two charging terminals 3 are provided on opposite sides of the insulating body 1, and the welded portions 32 of the two charging terminals 3 are provided on opposite sides of the insulating body 1.
[0048] As shown in Figure 3, in the circumferential direction of the housing groove 11, the contact portion 31 of the two charging terminals 3 and the welded portion 32 of the two charging terminals 3 do not overlap in area.
[0049] The above description is merely a preferred embodiment of the present invention, and those skilled in the art will find that specific embodiments and applications can be modified based on the spirit of the present invention. The contents of this specification should not be understood as limiting the present invention. [Explanation of Symbols]
[0050] 1...Insulating body, 11...Housing groove, 12...Fixing protrusion, 13...Engagement part, 14...Side wall, 141...Base ring, 142...Side wall, 143...Recessed groove, 15...Locking groove, 2...battery cells, 3...Charging terminal, 31...Contact part, 311...Engagement groove, 32...Welded part, 321...Fixing hole, 33...Welded protrusion, 34...Connecting part, 341...Connecting subsegment, 35...Protrusion, 4...Connecting member, 41...Connecting segment, 42...Collar, 421...Welding hole, 43...Insulating sheath, 431...Positioning hole, 5. Flux, 6...Support block, 61...Clamp slope.
Claims
1. An insulating body (1) having a housing groove (11) on its top surface into which one end of a battery cell (2) is inserted, Both are provided inside the insulating body (1) and have two charging terminals (3) which include a contact portion (31) exposed to the outside of the insulating body (1) and a welded portion (32) on which a welded protrusion (33) is provided. The device comprises two connecting members (4), each having a connecting segment (41) connected to the positive and negative electrodes of the battery cell (2), and a collar (42) having a welding hole (421) which is fitted into the corresponding welding protrusion (33) via the welding hole (421) and welded in place. A charging structure characterized by the following features.
2. The flux (5) is further fitted into the welding protrusion (33) and fixedly connected to the collar (42), The charging structure according to feature 1.
3. The connecting member (4) further comprises an insulating sheath (43) that covers the connecting segment (41) and the collar (42) and has a position-regulating hole (431) formed therein, the welding hole (421) is located within the position-regulating hole (431), and the flux (5) is located within the position-regulating hole (431) and fixedly connected to the collar (42). The charging structure according to feature 2.
4. Along the direction in which the weld protrusion (33) is inserted into the weld hole (421), the projection of a portion of the weld portion (32) is located outside the weld hole (421). The charging structure according to feature 1.
5. Each of the contact portions (31) is provided with a plurality of protrusions (35) embedded within the insulating body (1). The charging structure according to feature 1.
6. The welded portion (32) has a fixing hole (321), and the insulating body (1) is provided with a fixing protrusion (12) that is inserted into the fixing hole (321) to fix the welded portion (32). The charging structure according to feature 1.
7. The charging terminal (3) further comprises a connecting portion (34) at both ends which are connected to the contact portion (31) and the welded portion (32), and the connecting portion (34) comprises a plurality of connecting subsegments (341) which are connected sequentially and two adjacent subsegments are provided at an angle to each other. The charging structure according to feature 1.
8. The contact portion (31) is provided with a locking groove (311), and the insulating body (1) is provided with a locking portion (13) that locks into the locking groove (311). The charging structure according to feature 7.
9. The connection position between the connecting portion (34) and the contact portion (31) is located within the locking groove (311). The charging structure according to feature 8.
10. The charging structure is provided according to any one of claims 1 to 9, further comprising a case, a battery cell (2), and a speaker, wherein the case has a sound outlet and a connection hole that is closed by the charging structure, the speaker and the battery cell (2) are provided inside the case, the speaker is electrically connected to the battery cell (2), and sound can be reproduced through the sound outlet. Wireless earphones characterized by the following features.