Earphone and charging box magnetic attraction positioning structure and charging box

Abstract

This utility model discloses a magnetic positioning structure for earphones and a charging case, which includes a first magnet disposed inside the earphone and a second magnet installed inside the charging case. After the earphone is inserted into the receiving cavity of the charging case, the first magnet and the second magnet are attracted and fixed, positioning the earphone in the receiving cavity. The receiving cavity of the charging case includes a first receiving groove for accommodating the earbud portion of the earphone and a second receiving groove extending downward along one side of the first receiving groove for accommodating the earphone stem portion. The first magnet is disposed inside the earbud portion of the earphone, and the lower end of the first magnet is configured as an arc-shaped convex surface, which fits and assembles with the arc-shaped concave inner wall inside the earbud portion. The second magnet is disposed inside the charging case, above the battery installed inside the charging case, and below the first receiving groove. The second magnet and the first magnet form a vertical magnetic attraction fixation, and the part of the second magnet near the battery is also provided with an avoidance cut surface.

Description

Technical fields:

[0001] This utility model relates to the field of headphone technology, and specifically to a magnetic positioning structure for headphones and a charging case, and a charging case. Background technology:

[0002] With the development of technology, the variety of headphones has become increasingly diverse. Wireless headphones are free from the limitations of data cables, and all functions are integrated into the headphone unit. "Wireless" provides consumers with greater freedom and a more convenient way to travel, therefore, wireless headphones are becoming increasingly popular among consumers.

[0003] Wireless earphones generally require a charging case for charging. The earphones and the charging case are each equipped with a corresponding first magnet and second magnet. When the earphones are placed into the receiving slot of the charging case, the first magnet and the second magnet attract and fix the earphones in place, so that the charging case can stably charge the earphones.

[0004] For example, a charging device and electronic device assembly with patent application number 202321570291.9, the charging device includes at least one first magnetic element disposed on the side wall of a receiving cavity, the first magnetic element being configured to magnetically attract an earphone so that the earphone is positioned inside the receiving cavity, the earphone's stem being provided with a second magnetic element adapted to the position of the first magnetic element, the second magnetic element being configured to magnetically attract and fix it to the first magnetic element, the second magnetic element and the first magnetic element forming a magnetic positioning structure between the earphone and the charging case.

[0005] However, the aforementioned second magnetic component is located on the lower side of the earphone stem, making the earphone stem heavier. This affects the balance of the earphone's center of gravity when worn, leading to loosening and instability, or causing pressure on the ears and affecting wearing comfort. In addition, because the second magnetic component is located on the lower side of the earphone stem, after it is magnetically attracted and fixed to the first magnetic component on the inner wall of the receiving cavity, it mainly forms a horizontal force, resulting in a smaller vertical force. This makes the contact between the charging electrode at the lower end of the earphone and the conductive contact part in the charging device less stable, affecting the charging effect.

[0006] In view of the above, the inventors propose the following technical solution. Utility Model Content:

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a magnetic positioning structure for earphones and charging cases.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The magnetic positioning structure of the earphone and the charging case includes a first magnet disposed inside the earphone and a second magnet installed inside the charging case. After the earphone is inserted into the receiving cavity of the charging case, the first magnet and the second magnet are attracted and fixed, so that the earphone is positioned in the receiving cavity. The receiving cavity of the charging case includes a first receiving groove for accommodating the earbud part of the earphone and a second receiving groove extending downward along one side of the first receiving groove for accommodating the earphone stem. The first magnet is disposed inside the earbud part of the earphone, and the lower end of the first magnet is configured as an arc-shaped convex surface, which fits and assembles with the arc-shaped concave inner wall inside the earbud part. The second magnet is disposed inside the charging case, above the battery installed inside the charging case, and below the first receiving groove. The second magnet and the first magnet form a magnetic attraction fixation in the vertical direction, and the part of the second magnet near the battery is also provided with an avoidance cut surface.

[0009] Furthermore, in the above technical solution, the bottom surface of the first receiving slot is an inclined arc surface, and the second magnet is installed inclined inside the charging box, and the angle formed between the upper end surface of the second magnet and the bottom surface of the first receiving slot is 0-5°, and the lower end of the second magnet is provided with the avoidance cut surface.

[0010] Furthermore, in the above technical solution, the receiving cavity is disposed on the cavity support, which is fixedly installed inside the charging box, and the second magnet is inclined on the inner wall of the cavity support; wherein, the inner wall of the cavity support has a downwardly protruding arc portion corresponding to the first receiving groove, the lower end of the arc portion is thinned to form a mating plane, and the lower end of the arc portion is also formed with an annular frame, which surrounds the outside of the mating plane to form an inclinedly distributed mounting groove, the second magnet is embedded and fixed in the mounting groove, and the upper end face of the second magnet is mated with the mating plane.

[0011] Furthermore, in the above technical solution, the lower end of the annular frame is provided with several notches, and the lower end of the second magnet protrudes and is located in the notches; at least one corner of the annular frame is spaced from the lower end face of the convex arc portion to be in a suspended state, and a gap is formed between it and the mating plane, through which the lower end face of the convex arc portion is exposed.

[0012] Furthermore, in the above technical solution, the outer shell of the earphone includes a middle shell, an earbud shell fixedly installed on the front side of the upper end of the middle shell, and a back cover fixed on the rear side of the middle shell. The earbud shell and the front end of the middle shell form the earbud portion, and the middle shell and the back cover form the rod portion. The first magnet is disposed on the lower side of the front end of the earbud shell and the middle shell.

[0013] Furthermore, in the above technical solution, three limiting plates are provided on the lower front side of the middle shell, and an arc-shaped concave inner wall is formed on the lower front side of the middle shell. A limiting groove is formed between the three limiting plates and the arc-shaped concave inner wall, and the first magnet is embedded in the limiting groove.

[0014] Furthermore, in the above technical solution, the cross-section of the first magnet is a rectangle with one end larger than the other.

[0015] Furthermore, in the above technical solution, a PCB board is provided inside the charging box, and a conductive terminal is provided on the PCB board. An elastic conductive arm formed by bending on the conductive terminal passes through from bottom to top and is exposed at the junction of the bottom surface and the inner wall of the second receiving groove. An inclined charging electrode is provided at the lower corner of the rod. After the rod passes through the second receiving groove, the second magnet forms a magnetic force from top to bottom on the first magnet, so as to force the charging electrode to elastically contact the elastic conductive arm from top to bottom.

[0016] Furthermore, in the above technical solution, the conductive terminal includes a main body, a connecting arm extending upward and bent from the middle of the upper end of the main body, and an elastic conductive arm bent and extended from the end of the connecting arm, and three solder feet integrally formed at the lower end of the main body and arranged in a triangular pattern. The solder feet are inserted into the pads of the PCB board and soldered and fixed. The main body is bent into a square shape, which has a movable space for the elastic conductive arm to move. The upper ends of both sides of the main body extend upward at an angle to form a first extension and a second extension. The first extension and the second extension are respectively bent inward to form a first baffle and a second baffle, and the first baffle and the second baffle are spaced apart. The upwardly protruding arc-shaped guide portion formed by the bending of the end of the elastic guide arm passes through the gap to be exposed outside the upper end of the main body. The end of the arc-shaped guide portion also forms a first baffle and a second baffle on both sides. The first baffle and the second baffle abut against the inner walls of the first baffle and the second baffle, respectively, to prevent the arc-shaped guide portion of the elastic guide arm in the compressed state from protruding excessively outside the upper end of the main body.

[0017] Furthermore, in the above technical solution, a reinforcing rib is stamped in the middle of the arc-shaped guide portion along its arc direction, and the reinforcing rib protrudes from the outer surface of the arc-shaped guide portion; the solder foot is stamped from the outside to the inside to form a groove for increasing strength and accommodating solder, and the upper end of the groove is also provided with a through hole that penetrates the inner and outer surfaces of the solder foot and accommodates solder; a third baffle is also bent on the main body portion, and the third baffle is located above the connecting arm.

[0018] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0019] 1. This utility model places the first magnet inside the earbud part of the earphone, rather than at the lower end of the earphone stem. This ensures that when the earphone is worn in the ear, the center of gravity is located in the earbud part, and the center of gravity is closer to the ear canal. This does not affect the balance of the earphone when worn, and can ensure that the earbud part is stably inserted into the ear, ensuring the stability of the wearing. It also makes it less likely for the earphone to become unbalanced when worn, thus reducing pressure on the ear and improving wearing comfort.

[0020] 2. Because the lower end of the first magnet is designed with an arc-shaped convex surface, which fits snugly against the arc-shaped concave inner wall of the earbud portion, it can significantly reduce the space occupied by the first magnet while ensuring sufficient magnetic force, so as not to affect the installation of other parts within the earbud portion. Furthermore, the second magnet has a clearance cut surface near the battery, which is used for docking / avoiding assembly with the battery. This second magnet can also reduce its space occupation while ensuring sufficient magnetic force, thus not affecting the battery assembly and the overall size of the charging case.

[0021] 3. Since the first magnet is located inside the earbud part of the earphone, when the earphone is put into the receiving cavity of the charging case, the first magnet inside the earbud part forms a vertical magnetic attraction with the magnet located on the lower side of the first receiving groove, thereby generating a sufficiently strong downward pulling force on the earphone, so that the charging electrode located at the lower end of the earphone stem forms a stable connection with the elastic conductive arm in the second receiving groove, thereby improving the charging efficiency. Attached image description:

[0022] Figure 1 This is a perspective view of a charging box equipped with this utility model.

[0023] Figure 2 It is an assembly diagram of the charging case and earphones;

[0024] Figure 3 This is an assembly diagram of the charging case in the open position;

[0025] Figure 4 This is a cross-sectional view of the charging case;

[0026] Figure 5 This is an assembly drawing of the cavity support and the conductive terminal in this utility model;

[0027] Figure 6 This is an assembly diagram of the cavity support and the second magnet in this utility model;

[0028] Figure 7 This is an exploded view of the cavity support and the second magnet in this utility model;

[0029] Figure 8 This is an assembly diagram of the headphones;

[0030] Figure 9 This is a diagram of the internal structure of the headphones;

[0031] Figure 10 This is an assembly diagram of the first magnet and the earphone in this utility model;

[0032] Figure 11 This is a perspective view of the first magnet in this utility model;

[0033] Figure 12 This is a perspective view of the first magnet in this utility model from another angle;

[0034] Figure 13 This is a top view of the first magnet in this utility model;

[0035] Figure 14 This is a perspective view of the conductive terminal in this utility model;

[0036] Figure 15 This is a perspective view of the conductive terminal in this utility model. Detailed implementation method:

[0037] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0038] See Figure 1-15 As shown, the magnetic positioning structure between the earphone and the charging case includes a first magnet 2 disposed inside the earphone 100 and a second magnet 3 installed inside the charging case 300. After the earphone 100 is inserted into the receiving cavity 41 of the charging case 300, the first magnet 2 and the second magnet 3 are attracted and fixed, so that the earphone 100 is positioned in the receiving cavity 41.

[0039] The charging case 300 includes a receiving cavity 41 comprising a first receiving groove 411 for accommodating the earbud portion 101 of the earphone 100 and a second receiving groove 412 extending downward along one side of the first receiving groove 411 for accommodating the stem portion 102 of the earphone 100. In this embodiment, the first magnet 2 is disposed inside the earbud portion 101 of the earphone 100, and the lower end of the first magnet 2 is configured as an arc-shaped convex surface 21, which fits and is fitted with the arc-shaped concave inner wall 110 inside the earbud portion 101. The second magnet 3 is disposed inside the charging case 300 and is located above the battery 5 installed inside the charging case 300 and below the first receiving groove 411. It forms a magnetic attraction fixation with the first magnet 2 in the vertical direction, and the part of the second magnet 3 near the battery is also provided with an avoidance cut surface 31. In other words, this invention places the first magnet 2 inside the earbud portion 101 of the earphone 100, rather than at the lower end of the stem 102 of the earphone 100. This ensures that when the earphone is worn in the ear, the center of gravity is located in the earbud portion 101, and the center of gravity is closer to the ear canal. This does not affect the balance of the earphone when worn, ensuring that the earbud portion 101 is stably inserted into the ear, guaranteeing the stability of the wearing experience, and reducing the risk of pressure on the ear due to an unbalanced center of gravity, thus improving wearing comfort. Furthermore, since the lower end of the first magnet 2 is set as an arc-shaped convex surface 21, which fits snugly against the arc-shaped concave inner wall 110 inside the earbud portion 101, it can greatly reduce the space occupied by the first magnet 2 while ensuring that the magnetic force of the first magnet 2 is sufficiently large, so as not to affect the installation of other parts inside the earbud portion 101. Furthermore, the second magnet 3 has an avoidance cut surface 31 near the battery 5. This avoidance cut surface 31 is used for docking / avoidance assembly with the battery 5. The second magnet 3 can also reduce the space occupied while ensuring sufficient magnetic force, so as not to affect the battery assembly and thus not affect the overall size of the charging case. Finally, since the first magnet 2 is located inside the earbud part 101 of the earphone 100, after the earphone 100 is put into the receiving cavity 41 of the charging case 300, the first magnet 2 in the earbud part 101 forms a vertical magnetic attraction fixation with the earphone located on the lower side of the first receiving groove 411. This creates a sufficiently strong downward pulling force on the earphone 100, so that the charging electrode at the lower end of the earphone 100 rod forms a stable connection with the elastic conductive arm 71 in the second receiving groove 412, thereby improving the charging efficiency.

[0040] The specific structure of the first magnet 2 assembled with the earphone 100 is as follows:

[0041] The outer shell 1 of the earphone 100 includes a middle shell 11, an earbud shell 12 fixedly installed on the front side of the upper end of the middle shell 11, and a rear cover 13 fixedly installed on the rear side of the middle shell 11. The earbud shell 12 and the front end of the middle shell 11 form the earbud portion 101, and the middle shell 11 and the rear cover 13 form the rod portion 102. The first magnet 2 is disposed on the lower side of the front end of the earbud shell 12 and the middle shell 11. Three limiting pieces 111 are provided on the lower side of the front end of the middle shell 11, and an arc-shaped concave inner wall 110 is formed on the lower side of the front end of the middle shell 11. A limiting groove 112 is formed between the three limiting pieces 111 and the arc-shaped concave inner wall 110. The first magnet 2 is embedded in the limiting groove 112, which ensures the stability of the assembly structure. In other embodiments, glue can be added to bond the first magnet 2 to the limiting groove 112, which can further improve the stability of the assembly structure.

[0042] The first magnet 2 has a rectangular cross-section that is larger at one end and smaller at the other end. This means that the size of one end of the first magnet 2 is reduced. Its shape is also intended to avoid the installation of other parts inside the earplug part 101.

[0043] The specific structure of the assembly between the second magnet 3 and the charging box 300 is as follows:

[0044] The receiving cavity 41 is disposed on the cavity support 4, which is fixedly installed inside the charging box 300. The second magnet 3 is inclined on the inner wall of the cavity support 4. The inner wall of the cavity support 4 has a downwardly protruding arc portion 42 corresponding to the first receiving groove 411. The lower end of the arc portion 42 is thinned to form a mating plane 421. The lower end of the arc portion 42 is also formed with an annular frame 43, which surrounds the outside of the mating plane 421 to form an inclined mounting groove 430. The second magnet 3 is embedded and fixed in the mounting groove 430, and the upper end face of the second magnet 3 is mated with the mating plane 421 to ensure that the second magnet 3 is more stably fixed in the mounting groove 430. Since the mating plane 421 is formed by thinning the lower end of the arc portion 42, it is equivalent to moving the installation position of the second magnet 3 upward, further reducing the space required for the installation of the second magnet 3, and ensuring sufficient space for the battery installation later.

[0045] The bottom surface of the first receiving slot 411 is an inclined arc surface, and the second magnet 3 is installed obliquely inside the charging box 300. The angle formed between the upper end surface of the second magnet 3 and the bottom surface of the first receiving slot 411 is 0-5°, with the optimal solution being an angle of 0°. The lower end of the second magnet 3 is provided with the avoidance cut surface 31, which makes the assembly structure of the second magnet 3 more compact and further reduces the space required for the installation of the second magnet 3.

[0046] The lower end of the annular frame 43 is provided with several recesses 431, and the lower end of the second magnet 3 protrudes into the recesses 431, which facilitates the installation of the second magnet 3 into the mounting groove 430. If a problem is found in the installation, the second magnet 3 can be easily removed from the mounting groove 430 through the recesses 431.

[0047] At least one corner of the annular frame 43 is spaced from the lower end face of the convex arc portion 42 to be in a suspended state, and a notch 432 is formed between it and the mating plane 421, through which the lower end face of the convex arc portion 42 is exposed. When a problem is found in the installation of the second magnet 3, the corner of the second magnet 3 corresponding to the notch 432 can be pressed down directly, which can press the corner into the notch 432, thereby causing the other corner of the second magnet 3 to lift up. Generally, the second magnet 3 can be manually removed from the mounting groove 430, improving the convenience of operation.

[0048] The charging box 300 is provided with a PCB board 6, on which a conductive terminal 7 is provided. An elastic conductive arm 71 formed by bending on the conductive terminal 7 passes through from bottom to top and is exposed at the junction of the bottom surface and the inner wall of the second receiving groove 412. The lower corner of the rod 102 is provided with an inclined charging electrode 14. After the rod 102 passes through the second receiving groove 412, the second magnet 3 forms a magnetic force from top to bottom on the first magnet 2, so as to force the charging electrode 14 to elastically contact the elastic conductive arm 71 from top to bottom, which ensures the stability of the contact between the charging electrode 14 and the conductive terminal 7.

[0049] The specific structure of the conductive terminal 7 is as follows: the conductive terminal 7 includes a main body 72, a connecting arm 73 that extends upward and bends along the middle of the upper end of the main body 72, an elastic conductive arm 71 that is bent and extended along the end of the connecting arm 73, and three solder feet 74 integrally formed on the lower end of the main body 72 and arranged in a triangular pattern, wherein the solder feet 74 are inserted into the solder pads of the PCB board 6 and soldered and fixed.

[0050] The main body 72 is bent into a square frame shape, which has an active space 720 for the elastic guide arm 71 to move. The upper ends of both sides of the main body 72 extend upward to form a first extension 721 and a second extension 722. The first extension 721 and the second extension 722 are bent from the outside to the inside to form a first baffle 723 and a second baffle 724, respectively. The first baffle 723 and the second baffle 724 are spaced apart. This space is part of the active space 720. The upwardly protruding arc-shaped guide portion 711 formed by bending the end of the elastic guide arm 71 passes through this space and is exposed outside the upper end of the main body 72 for connection with the charging electrode.

[0051] The arc-shaped conductive portion 711 is further provided with a first stop 712 and a second stop 713 at its ends. The first stop 712 and the second stop 713 abut against the inner walls of the first stop plate 723 and the second stop plate 724, respectively, to prevent the arc-shaped conductive portion 711 of the elastic conductive arm 71, which is in a compressed state, from protruding excessively beyond the upper end of the main body portion 72. The elastic conductive arm 71 has an upward elastic force when it is in a compressed state. Due to the obstruction of the first stop plate 723 and the second stop plate 724, it can ensure that the arc-shaped conductive portion 711 will not pop out accidentally, and effectively improve the elastic force of the arc-shaped conductive portion 711, so as to form a more stable elastic conductive effect with the charging electrode.

[0052] A third baffle 725 is also formed by bending on the main body 72, and the third baffle 725 is located above the connecting arm 73.

[0053] The arc-shaped conductive part 711 has a reinforcing rib 714 stamped in the middle along its arc direction. The reinforcing rib 714 protrudes from the outer surface of the arc-shaped conductive part 711, which can greatly enhance the strength of the arc-shaped conductive part 711 and avoid the problem of deformation when the arc-shaped conductive part 711 comes into contact with the charging electrode.

[0054] To improve the stability of soldering between the solder foot 74 and the pads of the PCB board 6, the following improvements were made: the solder foot 74 is formed by stamping from the outside to the inside to create a groove 741 for increasing strength and accommodating solder, and the upper end of the groove 741 is also provided with a through hole 742 that penetrates the inner and outer surfaces of the solder foot 74 and accommodates solder. The groove 741 and the through hole 742 added to the solder foot 74 can both accommodate solder, thereby improving the stability of soldering between the solder foot 74 and the pads of the PCB board 6.

[0055] In summary, this invention places the first magnet 2 inside the earbud portion 101 of the earphone 100, rather than at the lower end of the stem 102 of the earphone 100. This ensures that when the earphone is worn in the ear, the center of gravity is located in the earbud portion 101, and the center of gravity is closer to the ear canal. This does not affect the balance of the earphone when worn, ensuring that the earbud portion 101 is stably inserted into the ear, guaranteeing the stability of the wearing experience, and reducing the risk of pressure on the ear due to an unbalanced center of gravity, thus improving wearing comfort. Furthermore, since the lower end of the first magnet 2 is designed as an arc-shaped convex surface 21, which fits snugly against the arc-shaped concave inner wall 110 inside the earbud portion 101, it can greatly reduce the space occupied by the first magnet 2 while ensuring that the magnetic force of the first magnet 2 is sufficiently large, so as not to affect the installation of other parts inside the earbud portion 101. Furthermore, the second magnet 3 has an avoidance cut surface 31 near the battery 5. This avoidance cut surface 31 is used for docking / avoidance assembly with the battery 5. The second magnet 3 can also reduce the space occupied while ensuring sufficient magnetic force, so as not to affect the battery assembly and thus not affect the overall size of the charging case. Finally, since the first magnet 2 is located inside the earbud part 101 of the earphone 100, after the earphone 100 is put into the receiving cavity 41 of the charging case 300, the first magnet 2 in the earbud part 101 forms a vertical magnetic attraction fixation with the earphone located on the lower side of the first receiving groove 411. This creates a sufficiently strong downward pulling force on the earphone 100, so that the charging electrode at the lower end of the earphone 100 rod forms a stable connection with the elastic conductive arm 71 in the second receiving groove 412, thereby improving the charging efficiency.

[0056] 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 magnetic positioning structure for earphones and a charging case, comprising a first magnet (2) disposed inside the earphone (100) and a second magnet (3) installed inside the charging case (300), wherein after the earphone (100) is inserted into the receiving cavity (41) of the charging case (300), the first magnet (2) and the second magnet (3) are attracted and fixed, thereby positioning the earphone (100) in the receiving cavity (41), the receiving cavity (41) of the charging case (300) comprising a first receiving groove (411) for accommodating the earbud portion (101) of the earphone (100) and a second receiving groove (412) extending downward along one side of the first receiving groove (411) for accommodating the stem portion (102) of the earphone (100), characterized in that: The first magnet (2) is disposed inside the earbud portion (101) of the earphone (100). The lower end of the first magnet (2) is configured as an arc-shaped convex surface (21), which fits and is assembled with the arc-shaped concave inner wall (110) inside the earbud portion (101). The second magnet (3) is disposed inside the charging case (300) and is located above the battery (5) installed inside the charging case (300) and below the first receiving slot (411). The second magnet (3) and the first magnet (2) form a magnetic attraction fixation in the vertical direction, and the part of the second magnet (3) near the battery is also provided with an avoidance cut surface (31).

2. The magnetic positioning structure between the earphones and the charging case according to claim 1, characterized in that: The bottom surface of the first receiving slot (411) is an inclined arc surface, and the second magnet (3) is installed inclined inside the charging box (300). The angle formed between the upper end surface of the second magnet (3) and the bottom surface of the first receiving slot (411) is 0-5°. The lower end of the second magnet (3) is provided with the avoidance cut surface (31).

3. The magnetic positioning structure for the earphones and charging case according to claim 2, characterized in that: The receiving cavity (41) is disposed on the cavity support (4), which is fixedly installed in the charging box (300). The second magnet (3) is inclined on the inner wall of the cavity support (4). The inner wall of the cavity support (4) corresponding to the first receiving groove (411) has a downwardly protruding arc portion (42). The lower end of the arc portion (42) is thinned to form a mating plane (421). The lower end of the arc portion (42) is also formed with an annular frame (43). The annular frame (43) surrounds the outside of the mating plane (421) to form an inclined mounting groove (430). The second magnet (3) is embedded and fixed in the mounting groove (430), and the upper end face of the second magnet (3) is mated with the mating plane (421).

4. The magnetic positioning structure for the earphones and charging case according to claim 3, characterized in that: The lower end of the annular frame (43) is provided with several notches (431), and the lower end of the second magnet (3) also protrudes and is in the notch (431); at least one corner of the annular frame (43) is spaced from the lower end face of the convex arc portion (42) to be in a suspended state, and a notch (432) is formed between it and the mating plane (421), through which the lower end face of the convex arc portion (42) is exposed.

5. The magnetic positioning structure for the earphones and charging case according to claim 1, characterized in that: The outer shell (1) of the earphone (100) includes a middle shell (11), an earplug shell (12) fixedly installed on the front side of the upper end of the middle shell (11), and a rear cover (13) fixed on the rear side of the middle shell (11). The earplug shell (12) and the front end of the middle shell (11) form the earplug portion (101), and the middle shell (11) and the rear cover (13) form the rod portion (102). The first magnet (2) is disposed on the lower side of the front end of the earplug shell (12) and the middle shell (11).

6. The magnetic positioning structure for the earphones and charging case according to claim 5, characterized in that: Three limiting pieces (111) are provided on the lower front end of the middle shell (11), and an arc-shaped concave inner wall (110) is formed on the lower front end of the middle shell (11). A limiting groove (112) is formed between the three limiting pieces (111) and the arc-shaped concave inner wall (110), and the first magnet (2) is embedded in the limiting groove (112).

7. The magnetic positioning structure for the earphones and charging case according to claim 6, characterized in that: The first magnet (2) has a rectangular cross-section that is larger at one end and smaller at the other.

8. The magnetic positioning structure for the earphones and charging case according to any one of claims 1-7, characterized in that: The charging box (300) is provided with a PCB board (6), and the PCB board (6) is provided with a conductive terminal (7). The elastic conductive arm (71) formed by bending on the conductive terminal (7) passes through from bottom to top and is exposed at the junction of the bottom surface and the inner wall of the second receiving groove (412). The lower corner of the rod (102) is provided with an inclined charging electrode (14). After the rod (102) passes through the second receiving groove (412), the second magnet (3) forms a magnetic force from top to bottom on the first magnet (2) to force the charging electrode (14) to elastically contact the elastic conductive arm (71) from top to bottom.

9. The magnetic positioning structure for the earphones and charging case according to claim 8, characterized in that: The conductive terminal (7) includes a main body (72), a connecting arm (73) extending upward and bent from the middle of the upper end of the main body (72), and an elastic conductive arm (71) bent and extended from the end of the connecting arm (73), and three solder feet (74) integrally formed on the lower end of the main body (72) and arranged in a triangular pattern. The solder feet (74) are inserted into the pads of the PCB board (6) and soldered to fix them. The main body (72) is bent into a square frame shape, which has an active space (720) for the elastic conductive arm (71) to move. The upper ends of both sides of the main body (72) extend upward at an angle to form a first extension (721) and a second extension (722). The first extension (721) and the second extension (722) extend upward at an angle to form a triangular pattern. 22) A first baffle (723) and a second baffle (724) are formed by bending outwards and inwards respectively. The first baffle (723) and the second baffle (724) are spaced apart. The upwardly protruding arc-shaped guide portion (711) formed by bending the end of the elastic guide arm (71) passes through the gap and is exposed outside the upper end of the main body (72). The end of the arc-shaped guide portion (711) is also formed with a first baffle (712) and a second baffle (713) on both sides. The first baffle (712) and the second baffle (713) abut against the inner wall of the first baffle (723) and the second baffle (724) respectively to prevent the arc-shaped guide portion (711) of the elastic guide arm (71) in the compressed state from protruding excessively outside the upper end of the main body (72).

10. The magnetic positioning structure for the earphones and charging case according to claim 9, characterized in that: The arc-shaped guide portion (711) has a reinforcing rib (714) stamped in the middle along its arc direction, and the reinforcing rib (714) protrudes from the outer surface of the arc-shaped guide portion (711); the solder foot (74) is stamped from the outside to the inside to form a groove (741) for increasing strength and accommodating solder, and the upper end of the groove (741) is also provided with a through hole (742) that penetrates the inner and outer surfaces of the solder foot (74) and accommodates solder; the main body portion (72) is also bent to form a third baffle (725), which is located above the connecting arm (73).

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