Charging box and TWS earphone

Abstract

The application discloses a charging box and TWS earphones, the charging box comprises a bottom shell, an upper cover and a magnet assembly, the bottom shell is internally provided with a mounting cavity, the surface of the bottom shell is recessed towards the mounting cavity to form a containing groove for containing earphones, the upper cover is rotationally connected with the bottom shell to open or cover the containing groove, the magnet assembly comprises a first magnet and a second magnet, the first magnet is arranged on the upper cover, and the second magnet is arranged in the mounting cavity; wherein when the upper cover covers the containing groove, the first magnet and the second magnet are mutually adsorbed to apply pressure on the earphones in the containing groove by the upper cover. The application aims to provide a charging box which can guarantee the charging stability of earphones, can release the earphones from the close magnetic attraction state when the cover is opened to improve the earphone use experience of users, and can guarantee the charging stability of earphones, reduce the contact impedance and improve the charging performance when the charging box is closed in the charging state.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wireless earphone charging, in particular to a charging box and a TWS earphone applying the same. BACKGROUND

[0002] TWS earphone products are currently a type of electronic products developing rapidly. A general mainstream earphone charging box is divided into two parts, and the earphone is charged in the charging box of the lower part. In the related art, in order to ensure the stability of earphone charging, a permanent magnet is used in the lower part of the charging compartment as a fixed part for ensuring the stability of earphone charging. However, if the magnetic force of the lower shell magnet is too small, the earphone may be fixed insecurely and the impedance increases; and if the magnetic attraction is too large, the earphone is not friendly to users with thick fingers when the earphone is taken out. At the same time, since the human ear canal is a part that secretes a lot of oil (especially the TWS earphone user group is mostly young adults); after the earphone is used for a long time, there may be surface oil accumulation on the contact part of the earphone and the ear canal, which may need to be taken out and put in multiple times, and there is a situation that the earphone is thrown and scratched due to excessive force applied from the side. SUMMARY

[0003] The main purpose of the present application is to provide a charging box and a TWS earphone, which aims to provide a charging box that can ensure the stability of earphone charging. The charging box can not only release the earphone from the tight magnetic attraction state when the cover is opened to improve the user's earphone use experience, but also can ensure the stability of earphone charging, reduce the contact impedance and improve the charging performance when the charging box is closed in the charging state.

[0004] To achieve the above purpose, the present application provides a charging box for charging an earphone, which comprises:

[0005] A bottom shell, wherein an installation cavity is arranged in the bottom shell, and a containing groove for containing the earphone is recessed on the surface of the bottom shell towards the installation cavity;

[0006] An upper cover, which is rotationally connected with the bottom shell to open or cover the containing groove;

[0007] A magnet assembly, which comprises a first magnet and a second magnet, wherein the first magnet is arranged on the upper cover, and the second magnet is arranged in the installation cavity;

[0008] When the upper cover covers the containing groove, the first magnet and the second magnet are attracted to each other to apply pressure to the earphone in the containing groove.

[0009] In an embodiment, the bottom shell is further provided with a through hole communicating with the installation cavity, one end of the second magnet is exposed to the through hole, and the other end of the second magnet extends towards the containing groove.

[0010] The earphone is provided with a magnetic attraction element, and the second magnet is used for mutual attraction with the magnetic attraction element of the earphone in the accommodation groove.

[0011] In an embodiment, the accommodation groove includes two, the two accommodation grooves are symmetrically arranged, the through hole is located between the two accommodation grooves, and the second magnet is located between the two accommodation grooves.

[0012] In an embodiment, the through hole includes two, the second magnet includes two, the two second magnets are symmetrically arranged, and one end of each second magnet is exposed to one through hole, and the other end of each second magnet extends towards one accommodation groove.

[0013] And / or, the second magnet is arranged in an arc shape, and the arc shape of the second magnet is matched with the arc shape of the groove wall of the accommodation groove.

[0014] In an embodiment, the upper cover is provided with a avoiding groove corresponding to each accommodation groove, and the first magnet is arranged between the two avoiding grooves.

[0015] In an embodiment, a mounting groove is arranged on one side of the upper cover facing the accommodation groove, and the first magnet is accommodated and limited in the mounting groove.

[0016] In an embodiment, the minimum distance between the first magnet and the earphone is greater than 20% of the diameter of the earphone.

[0017] And / or, the minimum distance between the second magnet and the second magnet is greater than 15% of the diameter of the earphone.

[0018] In an embodiment, the first magnet is a permanent magnet.

[0019] And / or, the second magnet is a soft magnet made of soft magnetic material.

[0020] In an embodiment, the magnet assembly further includes a third magnet, the third magnet is arranged in the mounting cavity, the third magnet is located below the accommodation groove and is spaced from the second magnet, the earphone is provided with a magnetic attraction element, and the third magnet is used for mutual attraction with the magnetic attraction element of the earphone in the accommodation groove.

[0021] And / or, the charging box further includes a charging module, the charging module is arranged in the mounting cavity, and the charging module is used for charging the earphone in the accommodation groove.

[0022] The application further provides a TWS earphone, which includes an earphone and the charging box described above, and the earphone is detachably accommodated in the accommodation groove of the charging box.

[0023] The charging case of this invention features a recessed groove on the surface of the bottom shell to accommodate earphones, facilitating earphone storage and charging. A top cover is rotatably connected to the bottom shell, allowing the top cover to open or close the groove, further ensuring earphone storage, protection, and charging stability. A magnetic assembly is incorporated, with a first magnet located on the top cover and a second magnet located within the mounting cavity of the bottom shell. When the charging case is charging the earphones, the top cover closes the groove, causing the first and second magnets to attract each other. This applies pressure from the top cover to the earphones within the groove, strengthening the magnetic attraction, reducing contact resistance, improving charging performance, and ensuring charging stability. When charging is complete, the top cover opens the groove and moves away from the bottom shell, releasing the earphones from their magnetic attraction and allowing the user to easily retrieve them, thus enhancing the user experience. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the upper cover of the TWS earphone opening receiving slot in one embodiment of the present invention;

[0026] Figure 2 This is a partially exploded view of the opening receiving slot of the top cover of a TWS earphone in one embodiment of the present invention;

[0027] Figure 3 This is a cross-sectional schematic diagram of the upper cover of a TWS earphone and its receiving groove according to an embodiment of the present invention.

[0028] Figure 4 This is a partial cross-sectional view of the opening receiving slot of the top cover of a TWS earphone in one embodiment of the present invention.

[0029] Explanation of icon numbers:

[0030] Reference Name Reference Name 100 TWS earphone 13 Magnet assembly 1 Charging box 131 First magnet 11 Bottom shell 132 Second magnet 111 Mounting cavity 133 Third magnet 112 Accommodation groove 2 Earphone 113 Through hole 21 Magnetic attraction piece 12 Upper cover 22 First magnetic piece 121 Avoidance groove 23 Second magnetic piece 122 Mounting groove

[0031] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0033] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0034] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0035] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0036] TWS earbuds are a rapidly developing category of electronic products. Generally, mainstream earbud charging cases are divided into upper and lower parts, with the earbuds located in the lower part for charging. In related technologies, to ensure reliable electrical contact between the earbuds and the charging case and provide a stable charging environment, magnets are typically placed under the earbuds and inside the charging case. The magnetic attraction between the two magnets ensures a reliable connection between the earbuds and the charging case, guaranteeing stable charging. However, a series of problems exist: if the magnetic force of the lower shell magnet is too weak, the earbuds may not be securely fixed, increasing impedance; while if the magnetic force is too strong, removing the earbuds is not user-friendly for users with large fingers. Additionally, since the human ear canal secretes a lot of oil (especially since the target audience for TWS earbuds is mostly young adults), after prolonged use, oil can accumulate on the surface of the earbuds where they contact the ear canal, potentially requiring repeated removal and replacement, and there is a risk of the earbuds flying off or scratched due to excessive lateral force. Furthermore, due to factors such as sweaty hands and the curved surface of the earphones, it can be difficult to overcome the strong magnetic attraction between the earphones and the charging case, potentially making it inconvenient to handle the earphones.

[0037] Based on the above concepts and problems, this invention proposes a charging case 1. It is understood that the charging case 1 is applied to a TWS earphone 100, which uses the charging case 1 to provide storage space and a charging environment for the earphones 2; that is, the charging case 1 is primarily used to charge the earphones 2. It is understood that the earphones 2 are wireless earphones, such as Bluetooth earphones, etc., and are not limited thereto.

[0038] Please refer to the reference. Figures 1 to 4 As shown, in this embodiment of the invention, the charging case 1 includes a bottom shell 11, a top cover 12, and a magnet assembly 13. The bottom shell 11 has a mounting cavity 111, and the surface of the bottom shell 11 is recessed into the mounting cavity 111 to form a receiving groove 112 for accommodating the earphone 2. The top cover 12 is rotatably connected to the bottom shell 11 to open or close the receiving groove 112. The magnet assembly 13 includes a first magnet 131 and a second magnet 132. The first magnet 131 is disposed on the top cover 12, and the second magnet 132 is disposed in the mounting cavity 111. When the top cover 12 closes the receiving groove 112, the first magnet 131 and the second magnet 132 attract each other, so that the top cover 12 applies pressure to the earphone 2 in the receiving groove 112.

[0039] In this embodiment, the bottom shell 11 has a mounting cavity 111 for accommodating and mounting components such as a charging module. A recessed groove 112 is formed on the surface of the bottom shell 11 to accommodate the earphone 2 to be charged; that is, the groove 112 on the surface of the bottom shell 11 is formed by the recess of the bottom shell 11 facing into the mounting cavity 111. To prevent the earphone 4 placed in the groove 112 from falling out or to avoid overheating during charging and thus preventing effective charging, a top cover 12 is provided, which is rotatably connected to the bottom shell 11, allowing the top cover 12 to open or close the groove 112.

[0040] Optionally, the charging case 1 also includes a charging module located in the mounting cavity 111, which is used to charge the earphones 2 in the receiving slot 112.

[0041] Understandably, the upper cover 12 and the bottom shell 11 are rotatably connected to the side of the surface adjacent to the receiving groove 112, for example, by means of a hole-shaft connection, hinge, or other means that can achieve a rotatable connection, which is not limited here. In this embodiment, the upper cover 12 has an upper surface and a lower surface that are opposite to each other. When the upper cover 12 covers the receiving groove 112, the lower surface is close to the bottom shell 11 and covers the opening of the receiving groove 112, so that the earphone can be fixed in the receiving groove 112.

[0042] It should be noted that when the upper cover 12 covers the receiving groove 112, in order to prevent the upper cover 12 from easily rotating to open the groove of the receiving groove 112, the upper cover 12 and the bottom shell 11 are detachably connected on the side away from the rotatable connection, such as by magnetic fixation, snap-fit ​​connection or locking connection, etc., which are not limited here.

[0043] In this embodiment, by placing the first magnet 131 on the upper cover 12 and the second magnet 132 on the bottom shell 11, when the upper cover 12 closes the receiving groove 112, the mutual attraction of the first magnet 131 and the second magnet 132 can achieve an adsorption connection between the upper cover 12 and the bottom shell 11 on the side away from the rotational connection. At the same time, the mutual attraction of the first magnet 131 and the second magnet 132 can also apply pressure to the earphone 2 in the receiving groove 112, thereby ensuring the stability of the charging connection of the earphone 2.

[0044] Understandably, when the top cover 12 opens the receiving slot 112, the top cover 12 moves away from the earphone 2 and the bottom shell 11, causing the first magnet 131 to move away from the second magnet 132, eliminating the attraction between the first magnet 131 and the second magnet 132, so as to release the earphone, thereby making it convenient for the user to take out the earphone 2 in the receiving slot 112.

[0045] It should be noted that the number of first magnets 131 can be one or more, and the number of second magnets 132 can also be one or more. Of course, the number of first magnets 131 can be the same as or different from the number of second magnets 132. For example, the first magnets 131 and second magnets 132 can be arranged in a one-to-one correspondence; or, one first magnet 131 can be arranged in a correspondence with multiple second magnets 132, or multiple first magnets 131 can be arranged in a correspondence with one second magnet 132. That is, the first magnets 131 and second magnets 132 can be arranged in a one-to-many or many-to-one correspondence. This can reduce the weight and volume of the upper cover 12 or the bottom shell 11. Increasing the number of second magnets 132 / first magnets 131 can increase the magnetic force of the second magnets 132 / first magnets 131, which is not limited here.

[0046] In this embodiment, the first magnet 131 can be a magnet or a conductive coil, and the second magnet 132 can be a magnet or a conductive coil. Optionally, the first magnet 131 is a permanent magnet. The second magnet 132 is a soft magnet, which is made of a soft magnetic material, such as special cold-rolled silicon steel with good magnetic permeability.

[0047] Understandably, the first magnet 131 is a permanent magnet, providing permanent magnetism to ensure the attraction between the first magnet 131 and the second magnet 132. The second magnet 132 is a soft magnet. Thus, when the first magnet 131 approaches the second magnet 132, the permanent magnet, after being magnetized by the soft magnet, magnetizes the soft magnet, giving the second magnet 132 the ability to magnetically attract the earphone 2 and the first magnet 131. Of course, when the first magnet 131 moves away from the second magnet 132, the magnetism of the second magnet 132 decreases or disappears, thereby reducing its attraction and fixation on the earphone 2, making it easier for the user to remove the earphone 2.

[0048] In this embodiment, the speaker of the earphone 2 is a permanent magnet. To further improve the stability of the charging connection of the earphone 2, a magnetic attractor 21 is provided inside the earphone 2, so that the second magnet 132 can not only attract the first magnet 131, but also further attract and fix the earphone 2. Optionally, the magnetic attractor 21 can be a magnet or a permanent magnet, etc., which is not limited here.

[0049] Of course, in other embodiments, the first magnet 131 is a permanent magnet and the second magnet 132 is a permanent magnet, which is not limited here.

[0050] In this embodiment, the first magnet 131 is a permanent magnet and the second magnet 132 is a soft magnet. At this time, the magnetic force is changed by simply changing the distance between the first magnet 131 and the second magnet 132 in the two states of opening and closing the cover. This allows the earphone 2 to be easily removed from the charging case 1 while ensuring the charging stability of the earphone 2. There is no need to set up conductive circuits. The structure is simple, the equipment cost is low, and the later maintenance cost is also low.

[0051] Compared to the prior art, in this embodiment of the invention, when the cover is closed (the upper cover 12 is fastened onto the bottom shell 11), the first magnet 131 approaches the second magnet 132 to magnetize the second magnet 132. This increases the attraction force between the first magnet 131 and the second magnet 132, and also increases the attraction force between the second magnet 132 and the magnetic suction component 21 of the earphone 2. This allows the earphone 2 to be fixed by the attraction force of the second magnet 132 on one hand, and pushed towards the bottom shell 11 by the pressing force of the upper cover 12 on the earphone 2 on the other hand, thereby improving the earphone 2's position. The reliable connection between the earphone 2 and the charging case 1 ensures the charging stability of the earphone 2. When the cover is opened (the top cover 12 is opened), the attraction between the first magnet 131 and the second magnet 132 disappears due to the increased distance between them. The magnetic attraction of the second magnet 132 is also reduced or weakened. This eliminates the external pressure from the top cover 12 on the earphone 2 and reduces the magnetic attraction of the second magnet 132 on the earphone 2. The attraction force that needs to be overcome to remove the earphone is very small, making it easier to take the earphone 2 out of the charging case 1.

[0052] The charging case 1 of the present invention has a recessed receiving groove 112 formed on the surface of the bottom shell 11, which is used to accommodate the earphone 2 for easy storage and charging. A top cover 12 is rotatably connected to the bottom shell 11, allowing the receiving groove 112 to be opened or closed, thereby further ensuring the storage, protection, and charging stability of the earphone 2. A magnet assembly 13 is provided, with the first magnet 131 disposed on the top cover 12 and the second magnet 132 disposed within the mounting cavity 111 of the bottom shell 11. When the charging case 1 is for earphones... 2. During charging, the upper cover 12 closes the receiving slot 112, causing the first magnet 131 and the second magnet 132 to attract each other. This allows the upper cover 12 to apply pressure to the earphone 2 inside the receiving slot 112, thereby strengthening the magnetic attraction, reducing contact resistance, improving charging performance, and ensuring the charging stability of the earphone 2. When charging is finished, the upper cover 12 opens the receiving slot 112 and moves away from the bottom shell 11. The first magnet 131 moves away from the second magnet 132, releasing the earphone 2 from the tightly magnetic state. This makes it easier for the user to take out the earphone 2, thus improving the user's earphone 2 experience.

[0053] Understandably, the charging case 1 of this invention uses a magnet (i.e., 100% magnetic attraction) in the lower part of the existing charging case to attract the earphones. This 100% magnetic attraction is achieved by magnetizing both the bottom shell 11 and the top cover 12 of the charging case 1. In other words, the 100% magnetic attraction of the magnet in the lower part of the existing charging case is divided into two parts. For example, while retaining 30% of the original permanent magnet attraction on the bottom shell 11, the remaining 70% attraction is achieved by the permanent magnet of the top cover 12 magnetizing the soft magnet of the bottom shell 11. Thus, when the charging case 1 is charging the earphones 2, i.e., when the top cover 12 is on the bottom shell 11, the magnet of the top cover 12 magnetizes the soft magnet of the bottom shell 11, strengthening the magnetic attraction, reducing contact resistance, and improving charging performance. When charging is complete and the top cover 12 is opened, the permanent magnet of the top cover 12 moves away from the soft magnet of the bottom shell 11, and the magnetic attraction force on the earphones 2 decreases by 50% to 70%, making it easier for the user to retrieve the earphones.

[0054] In one embodiment, the bottom shell 11 is further provided with a through hole 113 communicating with the mounting cavity 111, one end of the second magnet 132 is exposed in the through hole 113, and the other end of the second magnet 132 extends toward the receiving groove 112; the earphone 2 is provided with a magnetic attractant 21, and the second magnet 132 is used to attract each other with the magnetic attractant 21 of the earphone 2 in the receiving groove 112.

[0055] In this embodiment, as Figure 1 , Figure 2 and Figure 4As shown, by providing a through hole 113 on the surface of the recessed receiving groove 112 of the bottom shell 11, the through hole 113 connects to the mounting cavity 111. In this way, the second magnet 132 can be exposed through the through hole 113. When the top cover 12 is fastened on the bottom shell 11, the first magnet 131 approaches the second magnet 132 and comes into contact with the second magnet 132 or can be easily magnetized to improve the magnetic attraction of the second magnet 132.

[0056] Understandably, by exposing one end of the second magnet 132 in the through hole 113 and having the other end of the second magnet 132 facing the receiving groove 112, the other end of the second magnet 132 is at least partially located on the side of the receiving groove 112 away from the opening. In this way, after the first magnet 131 magnetizes the second magnet 132, the second magnet 132 and the magnetic suction member 21 of the earphone 2 in the receiving groove 112 attract each other to improve the attraction and fixation of the earphone 2, and further ensure the charging connection stability of the earphone 2.

[0057] Optionally, the second magnet 132 is arranged in an arc shape, and the arc shape of the second magnet 132 is adapted to the arc shape of the groove wall of the receiving groove 112. It can be understood that by setting the second magnet 132 to an irregular shape, that is, an arc shape, the volume of the second magnet 132 is reduced, and the magnetic flux when the first magnet 131 magnetizes the second magnet 132 is increased.

[0058] In one embodiment, the receiving groove 112 includes two grooves 112 arranged symmetrically, the through hole 113 is located between the openings of the two receiving grooves 112, and the second magnet 132 is located between the two receiving grooves 112.

[0059] In this embodiment, as Figures 1 to 4 As shown, the bottom shell 11 has two receiving slots 112 on the side surface facing the top cover 12, and the two receiving slots 112 are symmetrically arranged, so as to facilitate the placement and charging of the user's left and right earphones 2 respectively, so as to reasonably distribute the space and improve the charging speed of the two earphones 2.

[0060] It should be noted that the two receiving grooves 112 are recessed into the mounting cavity 111 from the side of the bottom shell 11 facing the top cover 12, such that part of the space inside the mounting cavity 111 is located between the openings of the two receiving grooves 112. It can be understood that by placing the second magnet 132 inside the mounting cavity 111 and between the two receiving grooves 112, and by fastening the top cover 12 onto the bottom shell 11, the first magnet 131 corresponds to the second magnet 132 and attracts each other, thus ensuring that the pressure exerted by the top cover 12 on the earphones 2 within the two receiving grooves 112 is balanced.

[0061] Optionally, the through-hole 113 includes two parts, and the second magnet 132 includes two parts. The two second magnets 132 are symmetrically arranged, with one end of each second magnet 132 exposed in one through-hole 113 and the other end of each second magnet 132 extending towards a receiving groove 112. This arrangement ensures that the ends of the two second magnets 132 exposed in the through-hole 113 are attracted to the first magnet 131, and improves the attraction strength. This allows the ends of the two second magnets 132 away from the through-hole 113 to effectively attract and fix the magnetic components 21 of the earphone 2 in the two receiving grooves 112.

[0062] In this embodiment, the line connecting the two through holes 113 is parallel to the line connecting the centers of the two receiving grooves 112. Optionally, the line connecting the two through holes 113 coincides with the line connecting the centers of the two receiving grooves 112.

[0063] In one embodiment, such as Figures 1 to 4 As shown, the upper cover 12 has a clearance groove 121 corresponding to each receiving slot 112, and the first magnet 131 is disposed between two clearance grooves 121. It can be understood that by providing clearance grooves 121 on the upper cover 12, when the upper cover 12 is fastened to the bottom shell 11, the part of the earphone 2 protruding from the surface of the bottom shell 11 is received in the clearance groove 121, and the first magnet 131 and the second magnet 132 are brought closer together to improve the adsorption strength.

[0064] Understandably, by placing the first magnet 131 between the two clearance slots 121, the first magnet 131 and the second magnet 132 are directly opposite each other when the upper cover 12 is fastened to the bottom shell 11, thereby improving the magnetic attraction force.

[0065] In one embodiment, such as Figures 1 to 4 As shown, the upper cover 12 has a mounting groove 122 on the side facing the receiving groove 112, and the first magnet 131 is accommodated and confined within the mounting groove 122. It is understood that the mounting groove facilitates the installation and confinement of the first magnet 131, while ensuring the magnetic attraction strength of the first magnet 131. Optionally, the first magnet 131 may have a square, circular, elliptical, triangular, or other polygonal or irregular shape; no limitation is made here.

[0066] In one embodiment, the minimum distance between the first magnet 131 and the earphone 2 is greater than 20% of the diameter of the earphone 2. It is understood that by setting the minimum distance between the first magnet 131 and the earphone 2 to be greater than 20% of the diameter of the earphone 2, interference between the two sides of the earphone 2 is prevented, and the first magnet 131 on the top cover 12 is avoided from affecting the earphone 2, such as the earphone 2 being attracted by the permanent magnet of the first magnet 131 on the top cover 12 when the cover is opened.

[0067] Optionally, the minimum distance between the first magnet 131 and the earphone 2 is 21%, 23%, 235%, 28%, 30%, 33%, 35%, 40%, 45%, 50% of the diameter of the earphone 2, etc., and is not limited here.

[0068] In one embodiment, the minimum distance between the second magnets 132 and the second magnet 132 is greater than 15% of the diameter of the earphone 2. Understandably, this arrangement ensures that the two earphones 2 will not interfere with each other. Furthermore, the second magnets 132 on the bottom shell 11 are separately arranged, and the magnetic force of the upper first magnet 131 is conducted to the bottom of the earphone 2 through the irregularly shaped soft magnetic material of the second magnet 132, achieving magnetic attraction.

[0069] Optionally, the second magnet 132 is made of special cold-rolled silicon steel with good magnetic permeability as the material for the soft magnet, which effectively reduces magnetic leakage and the mass of the top cover magnet, resulting in a long service life. Optionally, the minimum distance between the second magnets 132 is 16%, 18%, 20%, 23%, 235%, 28%, 30%, 33%, 35%, 40%, 45%, 50% of the diameter of the earphone 2, etc., and is not limited here.

[0070] In one embodiment, the magnet assembly 13 further includes a third magnet 133, which is disposed in the mounting cavity 111. The third magnet 133 is located below the receiving groove 112 and spaced apart from the second magnet 132. The earphone 2 is provided with a magnetic attractant 21, and the third magnet 133 is used to attract each other to the magnetic attractant 21 of the earphone 2 in the receiving groove 112.

[0071] In this embodiment, as Figures 2 to 4 As shown, the magnetic component 21 of the earphone 2 includes a first magnetic component 22 and a second magnetic component 23. The first magnetic component 22 and the second magnetic component 23 can be an integral structure or a separate structure. In order to facilitate the use of the second magnet 132 and the third magnet 133 to attract the earphone 2 respectively, while avoiding the mutual repulsion between the second magnet 132 and the third magnet 133, the first magnetic component 22 and the second magnetic component 23 can optionally be set separately.

[0072] Understandably, the first magnetic element 22 of the earphone 2 is positioned at the end of the second magnet 132 furthest from the through hole 133, and the second magnetic element 23 is positioned correspondingly to the third magnet 133. That is, when the earphone 2 is placed in the receiving slot 112, the distance between the first magnetic element 22 and the second magnet 132 is the closest, and the distance between the second magnetic element 23 and the third magnet 133 is the closest.

[0073] It should be noted that the third magnet 133 is located below the receiving groove 112, that is, below the side of the receiving groove 112 facing away from the opening. The third magnet 133 is used to attract the second magnetic element 23 of the magnetic attraction element 21 in the earphone 2, so as to apply an attractive force to the earphone 2 from the top cover 12 to the bottom shell 11. With this configuration, when the cover is opened (the top cover 12 is opened), the third magnet 133 can attract the earphone 2, so as to prevent the earphone 2 from falling out of the charging case 1. At the same time, it avoids the problem that the corresponding indicator light of the earphone 2 will not light up due to poor contact with the charging case 1 when the cover is opened, so as to prevent the user from not being able to confirm whether the charging case 1 is damaged.

[0074] Since this embodiment also includes a first magnet 131 and a second magnet 132 that attract each other, the pressure applied by the top cover 12 to the earphone 2 increases the stability of the electrical connection between the earphone 2 and the charging case 1. Therefore, the attraction between the third magnet 133 and the second magnetic element 23 of the magnetic suction member 21 can be relatively small, making it easier to take the earphone 2 out.

[0075] Understandably, the third magnet 133 and / or the magnetic chuck 21 can also be a magnet or a conductive coil. When the third magnet 133 and the magnetic chuck 21 are magnets, there is no need to set up conductive lines, resulting in a simple structure, lower equipment cost, and lower maintenance cost. When either the third magnet 133 or the magnetic chuck 21 is a conductive coil, it can be energized when the lid is closed to provide an attractive force, thereby improving the electrical connection stability between the earphone 2 and the charging case 1. When the lid is opened, the power is cut off to cancel the attraction, thereby reducing the resistance when taking the earphone 2 out. Of course, either the third magnet 133 or the magnetic chuck 21 can also be made of magnetic materials such as iron.

[0076] The following conclusions were drawn from actual testing of the charging case 1 of the present invention and existing charging cases (i.e., those with magnets only placed at the bottom of the charging case):

[0077] (1) Magnetic attraction and earphone handling performance:

[0078] Existing charging cases have a constant magnetic force of 0.043N, and it is difficult to grab the earphones.

[0079] The charging case 1 of the present invention has a magnetic attraction force of 0.055N when the top cover 12 is closed and 0.011N when the top cover 12 is opened, and it is easier to grab the earphone 2 after opening the top cover 12.

[0080] (2) Durability analysis: Changes in magnetic force near the earphones after 15,000 cycles of opening and closing the charging case lid 12:

[0081] Existing charging case: 0.031N.

[0082] The magnetic attraction force of the charging case 1 of the present invention is 0.052N when the top cover 12 is closed and 0.0096N when the top cover 12 is open. It can be seen that the magnetic force of the charging case 1 of the present invention is weakened by less than 95%, which is within an acceptable range.

[0083] (3) Charging performance of earphone 2 and charging case 1 under normal conditions:

[0084] Existing charging case: When the top cover 12 is opened, the contact resistance between the earphone 2 and the charging pin is 14.5mΩ.

[0085] The charging case 1 of the present invention has the following characteristics: when the top cover 12 is closed, the contact resistance between the earphone 2 and the charging PIN is 9.2mΩ; when the top cover 12 is opened, the contact resistance between the earphone 2 and the charging PIN is 17.3mΩ.

[0086] Therefore, by using the charging case 1 of the present invention, it is possible to apply a greater suction force when designing the suction force between the charging case 1 and the earphone 2, thereby improving the charging efficiency of the earphone 2.

[0087] (4) Anti-fouling performance analysis: After applying oil to the charging terminal of earphone 2, the effect on contact impedance was compared (the oil mimics the earwax secreted by the human ear):

[0088] Existing charging case: When the top cover 12 is opened, the contact impedance between the earphone 2 and the charging pin is 20-23 milliohms.

[0089] The charging case 1 of the present invention has the following characteristics: when the top cover 12 is opened, the contact resistance between the earphone 2 and the charging pin is 10.2 to 12.5 milliohms; when the top cover 12 is closed, the contact resistance between the earphone 2 and the charging pin is 22 to 27 milliohms.

[0090] It is evident that the contact impedance of the dirty earphones 2 in the charging case 1 of the present invention is significantly better than that of existing charging cases, and the charging case 1 solution of the present invention is more stable and easier to use.

[0091] The present invention also proposes a TWS earphone 100, including an earphone 2 and the aforementioned charging case 1, wherein the earphone 2 is detachably housed in the receiving slot 112 of the charging case 1. The specific structure of the charging case 1 is as described in the foregoing embodiments. Since the present TWS earphone 100 adopts all the technical solutions of all the foregoing embodiments, it has at least all the beneficial effects brought about by the technical solutions of the foregoing embodiments, which will not be elaborated here.

[0092] As is understandable, there are two earphones 2, one for the user's left ear and one for the user's right ear.

[0093] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made under the concept of the present invention using the description and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A charging case for charging earphones, characterized in that, The charging case includes: The bottom shell has a mounting cavity inside, and the surface of the bottom shell is recessed into the mounting cavity to form a receiving groove for accommodating the earphone; The upper cover is rotatably connected to the bottom shell to open or close the receiving groove; A magnet assembly, comprising a first magnet and a second magnet, wherein the first magnet is disposed on the upper cover and the second magnet is disposed within the mounting cavity; When the top cover closes the receiving groove, the first magnet and the second magnet attract each other, so that the top cover applies pressure to the earphone inside the receiving groove; The bottom shell is also provided with a through hole communicating with the mounting cavity, one end of the second magnet is exposed in the through hole, and the other end of the second magnet extends toward the receiving groove; The earphone is equipped with a magnetic suction element, and the second magnet is used to attract the earphone with the magnetic suction element in the receiving slot; Wherein, the first magnet is a permanent magnet, and the second magnet is a soft magnet, wherein the soft magnet is made of a soft magnetic material; The receiving slot includes two slots, which are symmetrically arranged. The through hole is located between the openings of the two receiving slots, and the second magnet is located between the two receiving slots. The through hole includes two, the second magnet includes two, the two second magnets are symmetrically arranged, and one end of each second magnet is exposed in one of the through holes, and the other end of each second magnet extends toward one of the receiving grooves.

2. The charging case according to claim 1, characterized in that, The second magnet is arranged in an arc shape, and the arc shape of the second magnet is adapted to the arc shape of the receiving groove wall.

3. The charging case according to claim 1, characterized in that, The top cover is provided with a clearance groove for each of the receiving slots, and the first magnet is disposed between two of the clearance grooves.

4. The charging case according to claim 3, characterized in that, The top cover has a mounting groove on the side facing the receiving groove, and the first magnet is accommodated and confined within the mounting groove.

5. The charging case according to any one of claims 1 to 4, characterized in that, The minimum distance between the first magnet and the earphone is greater than 20% of the diameter of the earphone; And / or, the minimum distance between the second magnet and the second magnet is greater than 15% of the diameter of the earphone.

6. The charging case according to any one of claims 1 to 4, characterized in that, The magnet assembly further includes a third magnet, which is disposed in the mounting cavity, located below the receiving groove and spaced apart from the second magnet. The earphone is provided with a magnetic suction element, and the third magnet is used to attract each other with the magnetic suction element of the earphone in the receiving groove. And / or, the charging case further includes a charging module disposed within the mounting cavity, the charging module being used to charge the earphones within the receiving slot.

7. A TWS earphone, characterized in that, The device includes earphones and a charging case as described in any one of claims 1 to 6, wherein the earphones are detachably housed within a receiving slot of the charging case.

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