Charging box and earphone

Abstract

The utility model discloses a charging box and an earphone. The charging box comprises a first housing, a second housing and a flexible circuit board. The second shell is rotationally connected to the first shell around a first axis, the flexible circuit board comprises a first section and a second section which are distributed at an interval, the first section is fixed to the first shell, the second section is fixed to the second shell, and in the extension direction of the flexible circuit board, the side, away from the second section, of the first section is suitable for being electrically connected. The flexible circuit board further comprises a third section, the third section is located between the first section and the second section, the third section is movably connected to the first shell and / or the second shell, the second shell has a closed state and an open state, and the third section deforms along with state switching of the second shell. The structure of the electric connection part of the flexible circuit board is more stable, and the position stability is guaranteed, so that the damage caused by frequent bending of the third section is reduced, and the service life of the circuit board is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of circuit board design, and in particular to a charging box and earphones. Background Art

[0002] With the advancement of modern technology, flexible printed circuits (FPCs) have gained widespread application in the design and manufacture of electronic devices due to their lightweight, flexible nature. In particular, in portable electronic devices such as laptops, tablets, and smartphones, FPCs connect the motherboard with key components like the screen and touchpad, providing significant design flexibility and space efficiency. However, in practical applications, especially in devices with removable components such as lids, the frequent opening and closing of lids makes it difficult to ensure the stability of the FPC's position.

[0003] When the cover is repeatedly opened and closed, the FPC undergoes repeated stretching and compression, which can cause changes in its physical structure. Over time, the FPC may become deformed, twisted, or even broken. These problems not only lead to degraded electrical performance, such as poor contact, signal attenuation, or complete loss of connection, but also negatively impact the functionality and reliability of the entire device. Furthermore, since the FPC is often located on critical paths within the device, any problems often require professional repair or replacement, increasing maintenance costs and inconvenience for users.

[0004] Existing solutions typically include, but are not limited to, using more durable materials, increasing the thickness of the FPC, or installing fixtures around it to reduce movement. However, these methods either increase the cost and weight of the device or fail to fundamentally solve the problem because they do not consider the behavioral characteristics of the FPC in a dynamic environment. Utility Model Content

[0005] The main purpose of the present utility model is to propose a charging box and earphones that can reduce the impact of the deformation of the flexible circuit board on its position for electrical connection, so that the structural stability of the electrical connection of the flexible circuit board can be guaranteed. Therefore, in the charging box of this application, the position stability of the flexible circuit board can be guaranteed.

[0006] To achieve the above objectives, some embodiments of the first aspect of the present invention provide a charging box, including:

[0007] a first shell;

[0008] a second housing rotatably connected to the first housing about a first axis;

[0009] A flexible circuit board having a first section and a second section spaced apart from each other, wherein the first section is fixed to the first housing, and the second section is fixed to the second housing, and along the extension direction of the flexible circuit board, a side of the first section away from the second section is suitable for electrical connection;

[0010] Among them, the flexible circuit board also includes a third segment, the third segment is located between the first segment and the second segment, the third segment is movably connected to the first shell and / or the second shell, the second shell has a closed state and an open state, in the closed state, the third segment is bent to form a first bending segment and a second bending segment, the bending directions of the first bending segment and the second bending segment are opposite, in the open state, the second bending segment is flat.

[0011] In some embodiments, the first housing has a groove having a bottom wall and side walls surrounding the bottom wall, the bottom wall of the groove is suitable for supporting a screen, the first segment is bent in the opposite direction of the groove to form a third bent segment, and the third bent segment is suitable for electrically connecting to the screen;

[0012] The third bending section is spaced from the side wall of the groove, and at least a portion of the third bending section is located between the side wall of the groove and the screen. A distance L1 from the screen to the side wall of the groove satisfies: 0.70 mm ≤ L1 ≤ 1.50 mm.

[0013] In some embodiments, the charging box includes a rotating shaft, and the first shell is rotatably connected to the second shell through the rotating shaft. The axis of the rotating shaft is parallel to the first axis. When the first shell switches between a closed state and an open state, the third segment abuts the rotating shaft and bends the third segment to form a second bent segment.

[0014] In some embodiments, in the closed state, along the direction from the first shell to the second shell, the bending area of ​​the second bending section is located on a side of the rotating shaft close to the second shell;

[0015] In the open state, along the direction from the first shell to the second shell, the side of the rotating shaft facing the first shell abuts against the third segment.

[0016] In some embodiments, the charging box includes a protective layer that wraps at least a portion of the first bending section; and / or

[0017] The protective layer wraps at least a portion of the second bending segment.

[0018] In some embodiments, the charging box includes a torsion spring, the first shell is rotatably connected to the second shell through the torsion spring, the torsion spring has a first winding end and a second winding end, and the flexible circuit board is located between the first winding end and the second winding end; and / or,

[0019] The charging box includes at least two torsion springs, which are spaced apart in a direction parallel to the first axis, and the flexible circuit board is located between the at least two torsion springs.

[0020] In some embodiments, the charging box includes a first clamping block, which is arranged between the first segment and the third segment. The two sides of the first clamping block respectively abut the flexible circuit board and the first shell to fix the flexible circuit board to the first shell.

[0021] In some embodiments, the charging box includes two first pressing blocks, the flexible circuit board is clamped between the two first pressing blocks, and the two first pressing blocks are both against the first shell to fix the flexible circuit board to the first shell.

[0022] In some embodiments, the charging box includes a chip, and a distance L2 between a surface of the chip facing the first shell and the first shell satisfies: 0.05 mm ≤ L2 ≤ 0.20 mm.

[0023] An embodiment of the second aspect of the present invention provides an earphone, comprising a charging box according to any of the above embodiments, wherein the earphone further comprises an earphone body and a storage compartment, wherein the storage compartment accommodates the earphone body and the charging box.

[0024] According to the above embodiments, the beneficial effects of the present invention are:

[0025] The charging box of the present invention includes a first shell, a second shell and a flexible circuit board. The first shell and the second shell are rotatably connected, and the flexible circuit board has a first segment, a second segment and a third segment. The first segment is fixed to the first shell, the second segment is fixed to the second shell, and the third segment is suitable for bending with the rotation of the first shell and the second shell. Specifically, the second shell has a closed state and an open state. In the closed state, the third segment bends to form a first bending segment and a second bending segment, and the bending directions of the first bending segment and the second bending segment are opposite; in the open state, the third segment stretches, and at this time the third segment only has the first bending segment.

[0026] With this design, the bending movement only occurs in the third section. Since the first section and the second section are fixedly connected to the first shell and the second shell respectively, and the position of the flexible circuit board for electrical connection is located on the side of the first section away from the second section, the bending movement of the third section has less impact on the position of the flexible circuit board for electrical connection. Specifically, when the position of the flexible circuit board for electrical connection is located at the position where the first section is fixed to the first shell and is away from the third section, the bending movement of the third section is unlikely to continue to affect the position of the flexible circuit board for electrical connection after passing through this fixed point. Of course, even if the position of the flexible circuit board for electrical connection is set between the position where it is fixed to the first shell and the third section, since the position of the flexible circuit board for electrical connection is away from the second section, that is, the position of the flexible circuit board for electrical connection is away from the third section and close to the fixed position, the position of the flexible circuit board for electrical connection is less affected by the bending of the third section. In summary, the structure of the flexible circuit board electrical connection of the present application is more stable, and the positional stability is guaranteed, thereby reducing damage caused by frequent bending of the third section and extending the service life of the circuit board. Secondly, the stacked bending design in which the first bending section and the second bending section bend in opposite directions is conducive to saving space.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0029] Figure 1 This is a schematic structural diagram of an earphone in an embodiment of the present invention, wherein the second shell is in a closed state;

[0030] Figure 2 For first-person perspective Figure 1 Schematic diagram of the structure of the middle earphone;

[0031] Figure 3 for Figure 2 Schematic diagram of the cross-section structure of the middle earphone;

[0032] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0033] Figure 5 for Figure 3 Enlarged view of point B in the middle;

[0034] Figure 6 for Figure 3 Enlarged view of point C in the middle;

[0035] Figure 7 for Figure 3 Enlarged view of point D in the middle;

[0036] Figure 8 To observe along the second perspective Figure 1 A schematic diagram of the structure of the middle earphone, wherein the second shell is hidden;

[0037] Figure 9 for Figure 8 Enlarged view of point E in the middle;

[0038] Figure 10 For third-person perspective Figure 1 A schematic diagram of the structure of the middle earphone, wherein the second shell is hidden;

[0039] Figure 11 for Figure 10 Schematic diagram of the structure of the middle earphone after the first shell is hidden;

[0040] Figure 12 This is a schematic structural diagram of an earphone according to an embodiment of the present invention, which compares the states of the flexible circuit board when the second shell is in a closed state and an open state respectively;

[0041] Figure 13 for Figure 12 Schematic diagram of the cross-section structure of the middle earphone;

[0042] Figure 14 This is a schematic structural diagram of an earphone in an embodiment of the present invention, wherein the second shell is in an open state;

[0043] Figure 15 for Figure 14 The schematic diagram of the structure of the earphone after the second shell is hidden;

[0044] Figure 16 for Figure 15 The structure diagram of the earphone after the first shell is hidden is shown.

[0045] Description of Figure Numbers:

[0046] First housing 100;

[0047] Second housing 200;

[0048] Flexible circuit board 300;

[0049] First segment 310; third bending segment 311;

[0050] Second section 320;

[0051] The third segment 330; the first bending segment 331; the second bending segment 332;

[0052] protective layer 340;

[0053] Rotating shaft 400;

[0054] Torsion spring 500; first winding end 510; second winding end 520;

[0055] First pressing block 600;

[0056] Second pressing block 700;

[0057] Screen 800;

[0058] Magnetic component 910; wireless charging bracket 920; chip 930.

[0059] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0061] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0062] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or", "and / or" or "and / or" appear in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0063] In related technologies, when the lid of the earphone compartment is frequently opened and closed, the FPC (flexible printed circuit board) inside is subjected to repeated stretching and compression. This continuous stress may cause the physical structure of the FPC to gradually change, such as deformation, twisting, and even breakage. These problems can seriously affect the electrical performance of the earphones, and may cause poor contact, signal attenuation, or even complete disconnection. Since the FPC is usually located in a critical position inside the earphone compartment, once a failure occurs, the user may need to seek professional help for repair or replacement, which not only increases maintenance costs but also brings inconvenience to the user.

[0064] Reference below Figures 1 to 16 To describe the charging box and earphones according to the embodiment of the present invention.

[0065] Reference Figure 1 、 Figure 2 、 Figures 11 to 13 and Figure 16In some embodiments, the present application provides a charging box for accommodating a battery. The charging box includes a first shell 100, a second shell 200, and a flexible circuit board 300. The first shell 100 and the second shell 200 are rotatably connected by a rotating shaft 400. The axis of the rotating shaft 400 is collinear with the first axis, that is, the first shell 100 can rotate relative to the second shell 200 around the first axis. The flexible circuit board 300 has a first segment 310 and a second segment 320 spaced apart. The first segment 310 is fixed to the first shell 100, and the second segment 320 is fixed to the second shell 200. In some embodiments, the flexible circuit board 300 is in the shape of an elongated strip. The first segment 310 and the second segment 320 are respectively located at opposite ends of the strip-shaped flexible circuit board 300. In order to match the first shell 100 and the second shell 200, the flexible circuit board 300 is bent so that the surfaces of the first segment 310 and the second segment 320 are almost parallel and spaced apart. Among them, along the extension direction of the strip-shaped flexible circuit board 300, the side of the first segment 310 away from the second segment 320 is suitable for electrical connection. The flexible circuit board 300 also includes a third segment 330, which is located between the first segment 310 and the second segment 320 and is movably connected to the first shell 100 and / or the second shell 200. The second shell 200 has a closed state and an open state. In the closed state, the third segment 330 is bent to form a first bending segment 331 and a second bending segment 332, and the bending directions of the first bending segment 331 and the second bending segment 332 are opposite; in the open state, the third segment 330 is stretched and the second bending segment 332 is flat. For example, referring to Figure 13 In some embodiments, when the second housing 200 is closed, the first segment 331 and the second segment 332 have sharp bend angles. When the second housing 200 switches from a closed state to an open state, the sharp angle of the first segment 331 tends to become a right angle, and the sharp angle of the second segment 332 tends to become 180 degrees, so that the second bent segment 332 becomes flat.

[0066] With this design, bending motion occurs only in the third segment 330. Because the first segment 310 and the second segment 320 are fixedly connected to the first housing 100 and the second housing 200, respectively, and the electrical connection location of the flexible circuit board 300 is located on the side of the first segment 310 away from the second segment 320, the bending motion of the third segment 330 has a minimal impact on the electrical connection location of the flexible circuit board 300. Specifically, when the electrical connection location of the flexible circuit board 300 is located away from the third segment 330 where the first segment 310 is fixed to the first housing 100, the bending motion of the third segment 330 is unlikely to affect the electrical connection location of the flexible circuit board 300 beyond this fixed point. Of course, even if the electrical connection position of the flexible circuit board 300 is set between the position where it is fixed to the first shell 100 and the third segment 330, since the electrical connection position of the flexible circuit board 300 is far away from the second segment 320, that is, the electrical connection position of the flexible circuit board 300 is far away from the third segment 330 and close to the fixed position, the position of the flexible circuit board 300 for electrical connection is less affected by the bending of the third segment 330. In summary, referring to Figures 1 to 16 The flexible circuit board 300 of this application provides a more stable structure at the electrical connection, ensuring positional stability. This reduces damage caused by frequent bending of the third segment 330 and extends the service life of the circuit board. Furthermore, the stacked bending design, in which the first bending segment 331 and the second bending segment 332 bend in opposite directions, helps save space.

[0067] It is understood that the portions of the flexible circuit board 300 connecting the first shell 100 and the second shell 200 are both fixed, while deformation occurs between these fixed positions. Deformation of the flexible circuit board 300 will not affect the portion away from the third segment 330, away from its fixed position. In particular, by positioning the flexible circuit board 300 for electrical connection at its end or at a position away from the third segment 330, the electrical connection is less affected by the bending movement of the third segment 330. This further ensures the stability of the circuit board when the earphone compartment lid is opened and closed, and improves the reliability of the flexible circuit board 300 in situations such as prolonged opening and closing of the lid, being dropped, being rolled, and rolling in a user's backpack.

[0068] It will be appreciated that in some embodiments, to further enhance the reliability of the flexible circuit board 300, the third segment 330 can be designed to have sufficient flexibility and resilience to ensure it does not break even during frequent bending and stretching. The material selection for the third segment 330 should consider its mechanical strength and electrical properties. Typically, polymers or metal composites are used, as these materials have excellent fatigue resistance and can maintain their original electrical connection performance after repeated bending. Furthermore, to enhance the durability of the third segment 330, a protective coating can be applied to its surface to prevent environmental damage to the circuit board. This structural design not only improves the service life of the flexible circuit board 300 but also ensures that the first and second bend segments 331, 332, formed in the closed state, are at mutually offset angles, eliminating additional stress on the circuit board and thus preventing performance degradation due to prolonged use. In the open state, the third segment 330, consisting only of the first bend segment 331, allows the circuit board to be more flat when unfolded, further reducing interference during signal transmission and improving signal transmission quality.

[0069] Reference Figure 3 and Figure 4 In some embodiments, the charging case further includes a recessed groove in the first housing 100. The recessed groove has a bottom wall and sidewalls surrounding the bottom wall, with the bottom wall being suitable for supporting the screen 800. The first segment 310 is bent in the opposite direction of the recessed groove to form a third bent section 311, which is suitable for electrically connecting to the screen 800. Furthermore, the third bent section 311 maintains a certain distance from the sidewalls of the recessed groove. The third bent section 311 is located between the sidewalls of the recessed groove and the gap formed by the screen 800. The distance L1 between the screen 800 and the sidewalls of the recess satisfies 0.70 mm ≤ L1 ≤ 1.50 mm. For example, L1 can be 0.70 mm, 0.90 mm, 1.10 mm, 1.30 mm, or 1.50 mm. This structure ensures that when the screen 800 is assembled with the first housing 100, the flexible circuit board 300 has sufficient space to extend 180° after being extended from the bottom of the screen 800, preventing excessive bending that could cause the flexible circuit board 300 to break. By controlling the distance between the third bending section 311 and the side wall of the groove, the flexible circuit board 300 has enough space to stretch naturally during the bending process, while avoiding the risk of damage caused by excessive bending angles.

[0070] Reference Figure 11 and Figure 16In some embodiments, the charging box includes a rotating shaft 400, which is used to rotatably connect the first shell 100 and the second shell 200. The axis of the rotating shaft 400 is parallel to the first axis. When the second shell 200 switches between the closed state and the open state, the third segment 330 abuts the rotating shaft 400 to form a second bent segment 332. This structural design allows the third segment 330 to bend against the rotating shaft 400 when the second shell 200 is closed, thereby reducing the bending radius, avoiding unnecessary deformation stress, and thereby improving the durability and service life of the circuit board.

[0071] It will be appreciated that in some embodiments, the contact design between the third segment 330 and the hinge 400 is intended to reduce the range of motion of the third segment 330 between the closed and open states, preventing excessive wear on the third segment 330 due to repeated opening and closing actions. By ensuring that the third segment 330 is in close contact with the hinge 400 in the closed state, bending occurs within a predetermined area, thereby avoiding the risk of circuit damage caused by the random bending of the third segment 330. In addition, because the bending area of ​​the third segment 330 in the closed state is confined to the vicinity of the hinge 400, bending in this area is more controllable, helping to reduce the failure rate of the flexible circuit board 300 when the earphone compartment lid is opened and closed.

[0072] Reference Figure 11 and Figure 16 In some embodiments, when the second housing 200 is in the closed state, the bending area of ​​the second bending section 332 is located on the side of the rotating shaft 400 close to the second housing 200. In the open state, the side of the rotating shaft 400 facing the first housing 100 abuts the third section 330. The advantage of this design is that whether the second housing 200 is closed or opened, the third section 330 is always effectively supported and guided, reducing the additional stress caused by free suspension, thereby enhancing the stability of the charging box.

[0073] It is understood that in some embodiments, the position of the second bending section 332 in the closed state is designed so that the bending occurs at the junction of the third section 330 and the rotating shaft 400, effectively dispersing the stress concentration caused by the bending. In the open state, the support provided by the rotating shaft 400 to the third section 330 not only helps to keep the third section 330 flat, but also prevents the third section 330 from unnecessary deformation without external support, further enhancing the reliability and durability of the charging box.

[0074] Reference Figure 8 and Figure 9In some embodiments, the charging box includes a protective layer 340 that wraps at least a portion of the first bending section 331 or the second bending section 332. The protective layer 340 is designed to protect the bending section from the external environment and prevent damage to the circuit board caused by friction or collisions generated during the bending process. By covering the bending section with the protective layer 340, not only the physical strength of the bending section is enhanced, but also the risk of circuit breakage during the bending process is reduced, thereby improving the overall durability of the charging box.

[0075] It is understood that in some embodiments, the protective layer 340 can be made of a material with a certain degree of flexibility and elasticity, such as rubber or silicone. These materials can provide good protection without adding excessive weight. After the protective layer 340 is covered over the first bending section 331 or the second bending section 332, its unique physical properties can effectively absorb and alleviate the stress generated during bending. This ensures that even with frequent opening and closing operations, the bending section can maintain good electrical performance, avoid circuit damage caused by bending, and extend the service life of the circuit board.

[0076] As a preferred embodiment, the protective layer 340 can be conductive cotton, which wraps the active area of ​​the flexible circuit board 300 to ensure that this section of the flexible circuit board 300 does not crack during long-term bending movements, thereby achieving functional and structural stability.

[0077] Reference Figure 8 、 Figure 9 、 Figure 11 and Figure 16 In some embodiments, the charging box includes a torsion spring 500, and the first shell 100 is rotatably connected to the second shell 200 via the torsion spring 500. The torsion spring 500 has a first winding end 510 and a second winding end 520, and the flexible circuit board 300 is located between the two winding ends. This structural design utilizes the elastic characteristics of the torsion spring 500, so that when the second shell 200 rotates around the first axis, the flexible circuit board 300 can maintain a stable range of motion under the action of the torsion spring 500, avoiding excessive stretching or compression caused by the movement of the shell, thereby reducing the chance of damage to the flexible circuit board 300 and improving the reliability of the circuit board.

[0078] It is understood that in some embodiments, the use of the torsion spring 500 is not limited to a single torsion spring 500, but may also include at least two torsion springs 500 spaced apart in a direction parallel to the first axis. The layout of multiple torsion springs 500 can more evenly disperse the stress generated by the movement of the shell, so that the flexible circuit board 300 can obtain consistent support at different positions, thereby further improving the stability and service life of the charging box. This configuration of the torsion spring 500 allows the flexible circuit board 300 to maintain good electrical connection performance during repeated opening and closing, while also reducing wear and fatigue damage caused by mechanical movement.

[0079] Of course, it is understandable that in some embodiments, corresponding magnetic members 910 are respectively provided on the side of the first shell 100 and the second shell 200 away from the rotating shaft 400, so as to optimize the movement of the second shell 200 when switching between the closed state and the open state through magnetic adsorption. Specifically, when the second shell 200 switches from the open state to the closed state, the magnetic members 910 adsorb against each other, guiding the movement of the second shell 200, so that the second shell 200 moves more strictly according to the rotation trajectory around the first axis; when the second shell 200 switches from the closed state to the open state, due to the mutual adsorption between the magnetic members 910, there will be a certain damping feeling, which optimizes the user's feel.

[0080] Reference Figure 7 In some embodiments, the charging box includes a first pressing block 600, which is provided between the first segment 310 and the third segment 330. The two sides of the first pressing block 600 respectively abut the flexible circuit board 300 and the first shell 100 to fix the flexible circuit board 300 to the first shell 100. After the flexible circuit board 300 is arranged on the bottom surface of the screen, in order to ensure the position consistency and prevent the flexible circuit board 300 from loosening, soft and elastic EVA is added to fix the flexible circuit board 300. This design ensures that the flexible circuit board 300 can be firmly fixed to the first shell 100 during installation, avoids the problem of loosening of the flexible circuit board 300 due to movement or vibration of the device, and thus improves the stability of the charging box.

[0081] It is understood that in some embodiments, in order to further enhance the fixing effect of the flexible circuit board 300, the material of the first clamping block 600 is selected to be soft and elastic. This material can adapt to the shape changes of the flexible circuit board 300 and provide sufficient friction, so that the flexible circuit board 300 can maintain a stable position even in complex usage environments. By placing the first clamping block 600 between the first segment 310 and the third segment 330, and ensuring that both sides of the clamping block are in close contact with the flexible circuit board 300 and the first shell 100 respectively, the flexible circuit board 300 can be effectively prevented from displacement due to mechanical shock or thermal expansion and contraction during long-term use, thereby ensuring the reliability of the charging box during use.

[0082] Reference Figure 7 In some embodiments, the charging box includes two first pressing blocks 600, and the flexible circuit board 300 is sandwiched between the two first pressing blocks 600. Both first pressing blocks 600 abut the first shell 100 to fix the flexible circuit board 300 to the first shell 100. Compared with the flexible circuit board 300 directly pressing on the first shell 100, the first pressing blocks 600 exert greater friction on the flexible circuit board 300 and can press it more stably. This design not only improves the fixing strength of the flexible circuit board 300, but also enables the flexible circuit board 300 to maintain good electrical connection performance when facing interference from various external factors.

[0083] It is understandable that in some embodiments, by using two first clamping blocks 600 to clamp the flexible circuit board 300, the dual clamping block configuration provides better stability compared to a single first clamping block 600. The provision of two clamping blocks can evenly distribute pressure and avoid local deformation or damage to the flexible circuit board 300 due to uneven force at a single point. At the same time, the flexible circuit board 300 is tightly clamped between the two clamping blocks, making it less likely to shift or loosen. In particular, when the device is subjected to intense movement or temperature changes, the flexible circuit board 300 can still maintain a firmly connected state, thereby ensuring the reliability and durability of the charging box throughout its entire use cycle.

[0084] Of course, it is understandable that the flexible circuit board 300 can also be fixed to the first shell 100 and the second shell 200 by means of adhesive or the like. It is only necessary to ensure that the position of the flexible circuit board 300 on both sides of the third segment 330 is fixed to the first shell 100 and / or the second shell 200.

[0085] Reference Figure 5In some embodiments, the charging box includes a chip 930, and the distance L2 between the surface of the chip 930 facing the first shell 100 and the first shell 100 satisfies the following: 0.05mm≤L2≤0.20mm. For example, L2 can be 0.05mm, 0.09mm, 0.13mm, 0.17mm, or 0.20mm. The SMT (Surface Mounted Technology) screen-mounted chip 930 is provided on the flexible circuit board 300 of the screen 800, and a gap of 0.05mm to 0.20mm is required with the inner shell. This design ensures sufficient clearance between the chip 930 on the flexible circuit board 300 of the screen 800 and the inner surface of the first shell 100, preventing the chip 930 from directly contacting the shell, thereby preventing short circuits or other electrical problems caused by thermal expansion or mechanical vibration, and improving the reliability and service life of the charging box.

[0086] It is understandable that in some embodiments, by controlling the distance L2 between the chip 930 and the housing, a small air gap is formed between the chip 930 and the housing. The existence of this air gap, on the one hand, plays a role in heat dissipation, helping the chip 930 to dissipate the heat generated during operation, and on the other hand, it also acts as a buffer layer, absorbing the mechanical stress caused by external impact or thermal expansion and contraction of internal components, thereby protecting the chip 930 from physical damage and ensuring the stability and reliability of the charging box under different usage conditions.

[0087] Reference Figure 6 In some embodiments, the first housing 100 has a recessed groove adapted to accommodate the screen 800. Along the recessed direction of the recess, the flexible circuit board 300 and the screen 800 are spaced apart. The distance L3 between the surface of the flexible circuit board 300 facing the screen 800 and the screen 800 satisfies the following: 0.20 mm ≤ L3 ≤ 0.40 mm. For example, L3 can be 0.24 mm, 0.28 mm, 0.32 mm, 0.36 mm, or 0.40 mm. After being bent 180°, the flexible circuit board 300 maintains an assembly clearance of 0.20 mm to 0.40 mm from the bottom surface of the screen 800 to ensure that the dimensional tolerance of the screen 800 and the deformation tolerance of the housing do not interfere with each other, potentially causing the bottom surface of the screen 800 to be pushed against. This design ensures proper spacing between the screen 800 and the flexible circuit board 300 during assembly, preventing deformation or damage to the screen 800 that could occur due to the screen 800 and the flexible circuit board 300 being too close together.

[0088] It will be appreciated that, in some embodiments, by controlling the distance L3 between the flexible circuit board 300 and the screen 800, a certain safe distance is ensured between the screen 800 and the flexible circuit board 300. This design not only prevents damage to the screen 800 due to squeezing during assembly, but also provides necessary protection for the screen 800, making it less susceptible to deformation or displacement due to external forces during subsequent use, thereby further improving the overall product quality and user experience.

[0089] In some embodiments, reference Figure 11 The flexible circuit board 300 is fixed to the second shell 200 through the second pressing block 700. Specifically, in order to prevent the product from falling and loosening during use, resulting in poor contact and affecting the function, EVA is added to press the flexible circuit board 300 and the lower shell. A wireless charging bracket 920 is provided in the second shell 200. The EVA is first processed on the wireless charging bracket 920, and the close spacing of the bracket and the compression of the EVA are used to achieve the loosening of the interface.

[0090] The embodiment of the second aspect of the present application provides an earphone, which adopts the charging box of any of the aforementioned embodiments. The earphone also includes an earphone body and a storage compartment, which accommodates the earphone body and the charging box. In the earphone of the present application, the bending movement only exists in the third segment 330. Since the first segment 310 and the second segment 320 are fixedly connected to the first shell 100 and the second shell 200 respectively, and the position of the flexible circuit board 300 for electrical connection is located on the side of the first segment 310 away from the second segment 320, the bending movement of the third segment 330 has less impact on the position of the flexible circuit board 300 for electrical connection. Specifically, when the position of the flexible circuit board 300 for electrical connection is located at the position where the first segment 310 fixes the first shell 100 away from the third segment 330, the bending movement of the third segment 330 is unlikely to continue to affect the position of the flexible circuit board 300 for electrical connection after passing through this fixed point. Of course, even when the electrical connection position of the flexible circuit board 300 is located between the position where it is fixed to the first shell 100 and the third segment 330, since the electrical connection position of the flexible circuit board 300 is far away from the second segment 320, that is, the electrical connection position of the flexible circuit board 300 is far away from the third segment 330 and close to the fixed position, the position of the flexible circuit board 300 used for electrical connection is less affected by the bending of the third segment 330. In summary, the structure of the electrical connection of the flexible circuit board 300 of the present application is more stable, and the position stability is guaranteed, thereby reducing damage caused by frequent bending of the third segment 330 and extending the service life of the circuit board. Therefore, the earphones of the present application have better durability and a longer service life.

[0091] The above are only preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A charging box for accommodating a cabin, characterized in that: include: a first shell; a second housing rotatably connected to the first housing about a first axis; A flexible circuit board having a first section and a second section spaced apart from each other, wherein the first section is fixed to the first housing, and the second section is fixed to the second housing, and along the extension direction of the flexible circuit board, a side of the first section away from the second section is suitable for electrical connection; In which, the flexible circuit board also includes a third segment, which is located between the first segment and the second segment, and the third segment is movably connected to the first shell and / or the second shell, and the second shell has a closed state and an open state. In the closed state, the third segment is bent to form a first bending segment and a second bending segment, and the bending directions of the first bending segment and the second bending segment are opposite. In the open state, the second bending segment is flat.

2. The charging box according to claim 1, characterized in that The first housing has a groove, the groove has a bottom wall and a side wall surrounding the bottom wall, the bottom wall of the groove is suitable for supporting a screen, the first segment is bent in the opposite direction of the concave direction of the groove to form a third bent segment, the third bent segment is suitable for electrically connecting to the screen; The third bending section is spaced from the side wall of the groove, and at least part of the third bending section is located between the side wall of the groove and the screen. The distance L1 from the screen to the side wall of the groove satisfies: 0.70 mm ≤ L1 ≤ 1.50 mm.

3. The charging box according to claim 1, characterized in that The charging box includes a rotating shaft, and the first shell is rotatably connected to the second shell through the rotating shaft. The axis of the rotating shaft is parallel to the first axis. When the first shell switches between the closed state and the open state, the third segment abuts the rotating shaft and bends the third segment to form the second bent segment.

4. The charging box according to claim 3, characterized in that: In the closed state, along the direction from the first shell to the second shell, the bending area of ​​the second bending section is located on a side of the rotating shaft close to the second shell; In the open state, along the direction from the first shell to the second shell, the side of the rotating shaft facing the first shell abuts against the third segment.

5. The charging box according to claim 1, characterized in that: The charging box includes a protective layer, and the protective layer wraps at least a portion of the first bending section; and / or The protective layer wraps at least a portion of the second bending section.

6. The charging box according to claim 1, characterized in that The charging box includes a torsion spring, the first shell is rotatably connected to the second shell via the torsion spring, the torsion spring has a first winding end and a second winding end, and the flexible circuit board is located between the first winding end and the second winding end; and / or, The charging box includes at least two torsion springs, which are spaced apart in a direction parallel to the first axis, and the flexible circuit board is located between the at least two torsion springs.

7. The charging box according to claim 1, characterized in that The charging box includes a first pressing block, which is arranged between the first segment and the third segment. The two sides of the first pressing block respectively abut the flexible circuit board and the first shell to fix the flexible circuit board to the first shell.

8. The charging box according to claim 7, characterized in that: The charging box includes two first pressing blocks, the flexible circuit board is clamped between the two first pressing blocks, and the two first pressing blocks both abut against the first shell to fix the flexible circuit board to the first shell.

9. The charging box according to claim 1, characterized in that: The charging box includes a chip, and a distance L2 between a surface of the chip facing the first shell and the first shell satisfies the following: 0.05 mm ≤ L2 ≤ 0.20 mm.

10. An earphone using the charging box according to any one of claims 1 to 9, characterized in that: The earphone also includes an earphone body and a storage compartment, and the storage compartment accommodates the earphone body and the charging box.

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