Earphone charging electrode structure

Abstract

The utility model discloses an earphone charging electrode structure, which comprises a charging electrode arranged at the lower end of a shell, the charging electrode is electrically connected with a circuit board arranged in the shell, and the lower end of the shell is provided with a counter bore; a terminal is welded and fixed to the lower end of the circuit board, elastic contact arms of the terminal are exposed on the two sides of the counter bore, the section of the charging electrode is in an inverted-T shape matched with the counter bore, the charging electrode penetrates through the counter bore and is fastened in an interference fit mode, and the end of the charging electrode further abuts against the elastic contact arms to make elastic contact with the elastic contact arms. And the charging electrode is electrically conducted with the circuit board. According to the utility model, the charging electrode is inserted into the counter bore at the lower end of the shell and is fastened through interference fit, the contact area between the charging electrode and the counter bore is large, the assembly structure is extremely stable, and the gap between the charging electrode and the counter bore is extremely small or zero, so that the waterproof effect is good, the assembly structure is simple, and the operation is simple. In addition, the circuit board is in elastic contact with the charging electrode through the terminal fixed by self welding, and the conductive connection is stable.

Description

Technical fields:

[0001] This utility model relates to the technical field of headphone products, and specifically to a headphone charging electrode structure. Background technology:

[0002] Headphones are a type of transducer that receives electrical signals from a media player or receiver and converts them into audible sound waves using speakers placed close to the ears.

[0003] Chinese utility model patent application number 202222884953.1 discloses a novel noise-canceling headphone, which includes a headphone shell, the headphone shell including an earbud part and a stem part, the stem part is equipped with a control circuit board, the earbud part is equipped with a battery, a speaker and a feedback microphone, the battery, speaker and feedback microphone are connected to the control circuit board, the control circuit board is provided with a charging electrode at the tail end, and the feedback microphone is integrated into the speaker.

[0004] In other words, the charging electrodes in the aforementioned noise-canceling headphones are directly soldered and fixed to the end of the control circuit board. During later assembly, the two charging electrodes at the end of the control circuit board need to be aligned with the two holes at the bottom of the stem. If there is even a slight misalignment, assembly will not be possible. In addition, this assembly method can also easily create gaps between the charging electrodes and the holes, which can affect the waterproof effect.

[0005] In view of the above, the inventors propose the following technical solution. Utility Model Content:

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a headphone charging electrode structure.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The headphone charging electrode structure includes a charging electrode installed at the lower end of the shell, which is electrically connected to a circuit board installed inside the shell. A countersunk hole is provided at the lower end of the shell. A terminal is welded and fixed at the lower end of the circuit board. The elastic contact arm of the terminal is exposed on both sides of the countersunk hole. The cross-section of the charging electrode is a convex shape adapted to the countersunk hole. The charging electrode passes through the countersunk hole and is fastened by interference fit. The end of the charging electrode also presses against the elastic contact arm to form an elastic contact with the elastic contact arm, so that the charging electrode is electrically connected to the circuit board.

[0008] Furthermore, in the above technical solution, the countersunk hole is inclinedly disposed at the corner of the lower end of the housing, and the corner of the lower end of the housing has a first arc-shaped convex surface. The charging electrode is equivalent to the inclined assembly of the housing, and the conductive surface at the lower end of the charging electrode is an arc-shaped convex surface. The outer edge of the conductive surface is smoothly connected to the first arc-shaped convex surface.

[0009] Furthermore, in the above technical solution, the inner wall of the countersunk hole is also provided with a limiting protrusion for preventing mistake and limiting position, and the charging electrode is also provided with a limiting groove that adapts to the limiting protrusion, and the limiting groove is embedded and fixed with the limiting protrusion.

[0010] Furthermore, in the above technical solution, the countersunk hole includes a limiting groove and a limiting hole connected to the limiting groove, the limiting groove having an inner diameter smaller than the limiting groove. The limiting groove has a circular cross-section, and the limiting hole has a D-shaped cross-section. The charging electrode includes an electrode body and a conductive post integrally formed on the electrode body and smaller in size than the electrode body. The electrode body has a circular cross-section, and the conductive post has a D-shaped cross-section. The conductive post passes through the limiting hole, and the electrode body is embedded and fixed in the limiting groove. The limiting protrusion is disposed in the limiting groove, and the limiting groove is disposed on the outer wall of the electrode body.

[0011] Furthermore, in the above technical solution, the size of the conductive post gradually decreases relative to the other end connected to the electrode body.

[0012] Furthermore, in the above technical solution, the inner wall of the countersunk hole is coated with sealant, and the outer wall of the charging electrode is in contact with the sealant to form a sealed assembly with the inner wall of the countersunk hole.

[0013] Furthermore, in the above technical solution, the end of the elastic contact arm is bent to form an outwardly raised contact surface, which contacts the charging electrode.

[0014] Furthermore, in the above technical solution, the terminal includes a main body, a connecting arm integrally connected to the main body and bent into an S-shape, and an elastic contact arm extending along the end of the connecting arm and bent to form the aforementioned elastic contact arm. The main body has a welding plane that is attached to the pads of the circuit board and fixed by soldering.

[0015] Furthermore, in the above technical solution, the main body is in the shape of a semi-square frame, and the connecting arm is integrally connected to the lower end of one side of the main body, while the other side of the main body has the welding plane.

[0016] Furthermore, in the above technical solution, a first stop arm extends downward from the lower middle part of the main body; a second stop arm extends downward from one side of the main body. The lower ends of the first stop arm and the first stop arm are bent from the outside to the inside to form a first stop portion and a second stop portion, respectively. The first stop arm and the first stop arm are distributed on both sides of the elastic contact arm, and the first stop portion and the second stop portion abut against the lower end surface of the elastic contact arm to prevent the elastic contact arm from popping down excessively.

[0017] After adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art: This utility model uses a charging electrode inserted into a countersunk hole at the lower end of the outer casing and secured with an interference fit. This results in a large contact area, an extremely stable assembly structure, and minimal or no gaps between the electrodes, thus providing excellent waterproofing. Furthermore, the assembly structure is simple and easy to operate. In addition, the circuit board forms an elastic contact with the charging electrode through its self-welded terminals, ensuring electrical conductivity between the charging electrode and the circuit board. This elastic connection ensures stable contact and prevents power outages. Attached image description:

[0018] Figure 1 This is a perspective view of the earphone containing this utility model.

[0019] Figure 2 This is a perspective view of the charging electrode in this utility model;

[0020] Figure 3 This is a partial exploded view of the earphone containing this utility model;

[0021] Figure 4 This is a perspective view of the charging electrode in this utility model from another angle;

[0022] Figure 5 This is a cross-sectional view of the earphone equipped with this utility model;

[0023] Figure 6 This is a perspective view of the terminal block in this utility model;

[0024] Figure 7 This is a perspective view of the terminal block from another angle in this utility model. Detailed implementation method:

[0025] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0026] See Figure 1-7 As shown, a headphone charging electrode structure includes a charging electrode 3 installed at the lower end of the housing 1. The charging electrode 3 is electrically connected to a circuit board 2 installed inside the housing 1, so that it can be electrically connected to a charger / charging case or other charging tool to charge the battery installed inside the housing 1.

[0027] The outer casing 1 includes a main casing 101 and a rear cover 102 covering the rear side of the main casing 101. The main casing 101 has a mounting position with a positioning post 105 inside. The circuit board 2 has positioning holes 20 that mate with the positioning post. The circuit board 2 is mounted in the mounting position and positioned by the positioning holes and the positioning post. The circuit board 2 is also secured by a snap fastener on the inner wall of the mounting position, thus fixing it securely within the main casing 101. A microphone 21 is mounted on the upper end of the circuit board 2. The rear cover 102 has a sound inlet 103 corresponding to the microphone 21. A mesh 104 is also provided inside the sound inlet 103 to protect the microphone 21.

[0028] The assembly structure of the charging electrode 3 and the outer shell 1 is as follows: a countersunk hole 11 is provided at the lower end of the outer shell 1. Correspondingly, the cross-section of the charging electrode 3 is convex, adapted to the countersunk hole 11. The charging electrode 3 passes through the countersunk hole 11 and is fastened by interference fit. The contact area between them is large, the assembly structure is extremely stable, and the gap between them is minimal or non-existent, resulting in good waterproof effect. The conductive structure of the charging electrode 3 and the circuit board 2 is as follows: a terminal 4 is welded and fixed at the lower end of the circuit board 2. The elastic contact arm 41 of the terminal 4 is exposed on both sides of the countersunk hole 11, and the end of the charging electrode 3 also presses against the elastic contact arm 41 to form elastic contact with the elastic contact arm 41, so that the charging electrode 3 and the circuit board 2 are electrically connected. The connection between them is elastic and stable, which can avoid the problem of power failure. In other words, this utility model uses a charging electrode 3 inserted into a countersunk hole 11 at the lower end of the outer casing 1 and secured with an interference fit. This results in a large contact area, an extremely stable assembly structure, and minimal or no gaps between the electrodes, thus providing excellent waterproofing. The assembly structure is simple and easy to operate. The charging electrode 3 has a convex cross-section that matches the countersunk hole 11, providing a large contact area and a stepped contact, further enhancing waterproofing. Furthermore, the circuit board 2 forms an elastic contact with the charging electrode 3 through its self-welded terminals 4, ensuring electrical conductivity between them. This elastic connection provides stable contact and prevents power outages.

[0029] The countersunk hole 11 is inclinedly disposed at the lower corner of the outer shell 1, and the lower corner of the outer shell 1 has a first arc-shaped convex surface 12. The charging electrode 3 is equivalent to the outer shell 1 being mounted at an angle, and the lower conductive surface 30 of the charging electrode 3 is an arc-shaped convex surface. The outer edge of the conductive surface 30 smoothly connects with the first arc-shaped convex surface 12, improving the aesthetics of the appearance. Furthermore, the conductive surface 30 of the charging electrode 3 is exposed at the lower corner of the outer shell 1, which allows for better connection with the conductors of charging tools such as chargers / charging cases, achieving better charging. Compared with the prior art, which uses a vertically mounted charging electrode, this invention, by mounting the charging electrode 3 at an angle relative to the outer shell 1, allows the height of the outer shell 1 to be made shorter, making the entire earphone smaller.

[0030] To make the assembly structure of the charging electrode 3 and the outer shell 1 more stable and to ensure that the insertion direction of the charging electrode 3 is unique, the following design is also made: the inner wall of the countersunk hole 11 is also provided with a limiting protrusion 113 for error prevention and positioning, and the charging electrode 3 is also provided with a limiting groove 311 that matches the limiting protrusion 113. The limiting groove 311 is embedded and fixed with the limiting protrusion 113, which not only plays the role of error prevention, but also prevents the charging electrode 3 from rotating in the countersunk hole 11, and at the same time improves the stability of the assembly structure, making the assembly structure of the charging electrode 3 and the outer shell 1 more stable.

[0031] Furthermore, the countersunk hole 11 includes a limiting groove 111 and a limiting hole 112 connected to the limiting groove 111 and having an inner diameter smaller than the limiting groove 111. The limiting groove 111 has a circular cross-section, and the limiting hole 112 has a D-shaped cross-section. The charging electrode 3 includes an electrode body 31 and a conductive post 32 integrally formed on the electrode body 31 and having a smaller size than the electrode body 31. The electrode body 31 has a circular cross-section, and the conductive post 32 has a D-shaped cross-section. The conductive post 32 passes through the limiting hole 112, and the electrode body 31 is embedded and fixed in the limiting groove 111, which achieves a foolproof function and improves the stability of the assembly structure. The limiting protrusion 113 is disposed in the limiting groove 111, and the limiting groove 311 is disposed on the outer wall of the electrode body 31.

[0032] The conductive post 32 gradually decreases in size at the other end connected to the electrode body 31, forming a guiding structure so that the conductive post 32 can be better inserted into the limiting hole 112, thereby improving assembly efficiency.

[0033] The inner wall of the countersunk hole 11 is coated with sealant, and the outer wall of the charging electrode 3 is in contact with the sealant to form a sealed assembly with the inner wall of the countersunk hole 11. This not only improves the stability of the assembly structure, but also enhances the sealing and waterproofing effect, eliminates the problem of water ingress, and can effectively improve the quality of the headphones.

[0034] The terminal 4 includes a main body 42, a connecting arm 43 integrally connected to the main body 42 and bent into an S-shape, and an elastic contact arm 41 extending and bent along the end of the connecting arm 43. The main body 42 has a welding plane 421, which is attached to the pads of the circuit board 2 and fixed by soldering. The S-shaped connecting arm 43 is added between the main body 42 and the elastic contact arm 41 to enhance the elastic deformation capability of the elastic contact arm 41, thereby facilitating a more stable contact between the elastic contact arm 41 and the charging electrode 3, improving conductivity, and preventing power outages.

[0035] The end of the elastic contact arm 41 is bent to form an outwardly raised contact surface 411. The contact surface 411 contacts the charging electrode 3, and its contact area is larger. It can enable the charging electrode 3 to better push up the end of the elastic contact arm 41, so that the end of the elastic contact arm 41 forms a reverse elastic force, so that the end of the elastic contact arm 41 is firmly against the charging electrode 3 to form a stable connection.

[0036] The main body 42 is semi-square, and the connecting arm 43 is integrally connected to the lower end of one side of the main body 42. The other side of the main body 42 has the welding plane 421.

[0037] The lower end of the middle part of the main body 42 is further formed with a first stop arm 44 extending downward; the side of one side of the main body 42 is also bent to form a second stop arm 45 extending downward. The lower ends of the first stop arm 44 and the first stop arm 45 are bent from the outside to the inside to form a first stop portion 441 and a second stop portion 442, respectively. The first stop arm 44 and the first stop arm 45 are distributed on both sides of the elastic contact arm 41, and the first stop portion 441 and the second stop portion 442 abut against the lower end surface of the elastic contact arm 41 to prevent the elastic contact arm 41 from popping down excessively. In the normal state, the elastic contact arm 41 is in a compressed state to form a downward elastic force. At this time, due to being blocked by the first stop portion 441 and the second stop portion 442, a greater elastic force can be formed to form a more stable connection with the charging electrode 3.

[0038] In summary, this utility model utilizes the charging electrode 3, which is inserted into the countersunk hole 11 at the lower end of the outer casing 1 and secured with an interference fit. This results in a large contact area, extremely stable assembly structure, and minimal or no gaps between the electrodes, providing excellent waterproofing. Furthermore, the assembly structure is simple and easy to operate. In addition, the circuit board 2 forms an elastic contact with the charging electrode 3 through its self-welded terminals 4, ensuring electrical conductivity between the charging electrode 3 and the circuit board 2. This elastic connection ensures stable contact and prevents power outages.

[0039] Of course, the above description is only a specific embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model should be included in the scope of the claims of the present utility model.

Claims

1. A headphone charging electrode structure, comprising a charging electrode (3) mounted on the lower end of a housing (1), the charging electrode (3) being electrically connected to a circuit board (2) mounted inside the housing (1). Its features are: The lower end of the outer casing (1) is provided with a countersunk hole (11); the lower end of the circuit board (2) is welded and fixed with a terminal (4), the elastic contact arm (41) of the terminal (4) is exposed on both sides of the countersunk hole (11), the cross section of the charging electrode (3) is convex and adapted to the countersunk hole (11), the charging electrode (3) passes through the countersunk hole (11) and is fastened by interference fit, and the end of the charging electrode (3) also presses against the elastic contact arm (41) to form an elastic contact with the elastic contact arm (41), so that the charging electrode (3) is electrically connected to the circuit board (2).

2. The headphone charging electrode structure according to claim 1, characterized in that: The countersunk hole (11) is inclinedly disposed at the corner of the lower end of the outer shell (1), and the corner of the lower end of the outer shell (1) has a first arc-shaped convex surface (12). The charging electrode (3) is equivalent to the outer shell (1) being assembled at an incline. The guide surface (30) at the lower end of the charging electrode (3) is an arc-shaped convex surface, and the outer edge of the guide surface (30) is smoothly connected to the first arc-shaped convex surface (12).

3. The headphone charging electrode structure according to claim 1, characterized in that: The inner wall of the countersunk hole (11) is also provided with a limiting protrusion (113) for preventing mistake and limiting position, and the charging electrode (3) is also provided with a limiting groove (311) adapted to the limiting protrusion (113), and the limiting groove (311) is embedded and fixed with the limiting protrusion (113).

4. The headphone charging electrode structure according to claim 3, characterized in that: The countersunk hole (11) includes a limiting groove (111) and a limiting hole (112) connected to the limiting groove (111) and having an inner diameter smaller than the limiting groove (111). The limiting groove (111) has a circular cross-section, and the limiting hole (112) has a D-shaped cross-section. The charging electrode (3) includes an electrode body (31) and a conductive post (32) integrally formed on the electrode body (31) and having a size smaller than the electrode body (31). The electrode body (31) has a circular cross-section, and the conductive post (32) has a D-shaped cross-section. The conductive post (32) passes through the limiting hole (112), and the electrode body (31) is embedded and fixed in the limiting groove (111). The limiting protrusion (113) is disposed in the limiting groove (111), and the limiting groove (311) is disposed on the outer wall of the electrode body (31).

5. The headphone charging electrode structure according to claim 4, characterized in that: The conductive post (32) gradually decreases in size relative to the other end connected to the electrode body (31).

6. The headphone charging electrode structure according to any one of claims 1-5, characterized in that: The inner wall of the countersunk hole (11) is coated with sealant, and the outer wall of the charging electrode (3) is in contact with the sealant to form a sealed assembly with the inner wall of the countersunk hole (11).

7. The headphone charging electrode structure according to any one of claims 1-5, characterized in that: The end of the elastic contact arm (41) is bent to form an outwardly raised contact surface (411), which contacts the charging electrode (3).

8. The headphone charging electrode structure according to any one of claims 1-5, characterized in that: The terminal (4) includes a main body (42), a connecting arm (43) integrally connected to the main body (42) and bent into an S-shape, and the elastic contact arm (41) extending and bent along the end of the connecting arm (43). The main body (42) has a welding plane (421) that is attached to the pads of the circuit board (2) and fixed by soldering.

9. The headphone charging electrode structure according to claim 8, characterized in that: The main body (42) is semi-square, and the connecting arm (43) is integrally connected to the lower end of one side of the main body (42). The other side of the main body (42) has the welding plane (421).

10. The headphone charging electrode structure according to claim 8, characterized in that: The lower end of the middle part of the main body (42) is further formed with a first stop arm (44); the side of one side of the main body (42) is also bent to form a second stop arm (45) extending downward. The lower ends of the first stop arm (44) and the first stop arm (44) are bent from the outside to the inside to form a first stop part (441) and a second stop part (442). The first stop arm (44) and the first stop arm (44) are distributed on both sides of the elastic contact arm (41), and the first stop part (441) and the second stop part (442) abut against the lower end surface of the elastic contact arm (41) to prevent the elastic contact arm (41) from popping down excessively.

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