The pivot structure of the thin-shell earphone charging box

Abstract

The present invention discloses a pivot structure for a thin-shell earphone charging box, comprising a cover and a box pivotally connected to each other. The pivot mechanism comprises a first pivot member, a second pivot member, a pivot, and a reinforcing plate. The cover connecting portion of the first pivot member is fixedly installed between the outer cover and the inner cover, and the upper pivot portion extends downward from the cover to the pivot notch; the box connecting portion of the second pivot member is fixedly installed between the outer box and the inner box, and the lower pivot portion extends upward from the box body to the pivot notch, and the lower pivot portion is pivotally connected to the upper pivot portion via a pivot; the reinforcing plate is fixed between the outer box and the inner box, and its plug-in plate is upwardly inserted into the lower slot provided on the box connecting portion. In response to the problem that the shell of the double-layer composite structure earphone charging box is relatively thin, the present invention adds a reinforcing plate to the pivot mechanism. The reinforcing plate is usually made of a metal plate and provides a strength support between the pivot structure and the shell of the charging box, which can effectively improve the problem of insufficient strength of the thin-shell charging box.

Description

Technical Field

[0001] The present invention relates to the technical field of charging boxes, and in particular to a pivotal structure suitable for a thin-shell earphone charging box with a relatively thin shell. Background Art

[0002] Common wireless earbuds today come with a charging case (or charging compartment) for storing and charging the earbuds. The case has a cavity shaped like the earbuds, housing two flexible electrodes for charging. When the earbuds are placed in the cavity, the charging electrodes come into contact with the flexible electrodes, charging.

[0003] The current charging box is usually composed of a cover and a box body. In order to facilitate the opening of the charging box, a pivot structure is adopted between the cover and the box body. Usually, in order to improve the opening and closing damping of the charging box, a torsion spring is usually configured at the junction of the cover and the box body of the charging box. The elastic force provided by the torsion spring can keep the charging box in the open and closed states. For example, the utility model patent with patent application number: 202222117214.X discloses the technical solution of "damping flip cover structure of earphone charging box". In addition, there is also a method of using magnetic attraction to keep the charging box in the closed state.

[0004] Currently, the pivot structure of the charging box mainly adopts the following two methods:

[0005] Method 1: The upper and lower pivoting parts are integrally molded from the lid and housing using plastic material, and then connected via a pivot. This method places high demands on the plastic material and injection molding process to ensure the integrally molded upper and lower pivoting parts are sufficiently strong.

[0006] Method 2: The upper pivoting portion and the lower pivoting portion for pivoting are formed independently and then fixedly connected to the cover body and the box body respectively.

[0007] For method 2, its injection molding process is relatively simple, and this method only requires the upper and lower pivotal parts to be made of plastic materials with sufficient strength, and the cover and the box body shell only need to have sufficient thickness to provide sufficient support. However, as the earphone charging box becomes more and more sophisticated, the current earphone charging boxes mostly adopt a double-layer composite structure, that is, the cover and the box body of the charging box usually have an inner and outer double-layer shell structure. The thickness of each layer of the shell in this structure is relatively thin, and the thinner shell is difficult to provide sufficient strength support for the pivot structure. In addition, in some earphone charging boxes, the USB interface for charging will be set next to the pivot structure. Due to the presence of the USB jack, the strength of the pivot position of the earphone shell is further reduced. Cracks and breakages are prone to occur in the charging box pivot structure due to insufficient strength.

[0008] In order to overcome the shortcomings of the above-mentioned method 2, the inventors propose the following technical solution. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a pivotal structure for a thin-shell earphone charging box.

[0010] In order to solve the above technical problems, the present invention adopts the following technical solutions: the pivot structure of the thin-shell earphone charging box includes: a cover body and a box body pivoted by a pivot mechanism, the cover body includes an outer cover and an inner cover that are nested together; the box body includes an outer box and an inner box that are nested together, and a pivot notch is formed on the edge position of the outer box corresponding to the pivot mechanism, and the pivot mechanism includes: a first pivot member, a second pivot member, a pivot and a reinforcing plate, the first pivot member includes an integrally formed cover body connecting portion and an upper pivot member; the second pivot member includes an integrally formed box body connecting portion. The cover body connecting part in the first pivot member is fixedly installed between the outer cover and the inner cover, and the upper pivot part extends downward from the cover body to the pivot notch; the box body connecting part in the second pivot member is fixedly installed between the outer box and the inner box, and the lower pivot part extends upward from the box body to the pivot notch, and the lower pivot part is pivotally connected to the upper pivot part through a pivot; the reinforcing plate is fixed between the outer box and the inner box, and it includes an integrally formed support plate and a plug-in plate, the support plate is abutted against the inner wall of the outer box, and the plug-in plate is inserted upward into the lower slot opened on the box body connecting part.

[0011] Furthermore, in the above technical solution, the inner cover is formed with an upper plugging edge that cooperates with the outer cover, and an upper snap-fit position is provided on the upper plugging edge; the inner wall of the outer cover is formed with a cover body snap-fitting with the upper snap-fit position.

[0012] Furthermore, in the above technical solution, an upper slot is formed at a position of the upper plug-in edge close to the pivot notch; and an upper plug-in portion that plugs into and cooperates with the upper slot is provided on the cover connecting portion.

[0013] Furthermore, in the above technical solution, the inner box is formed with a lower plug-in edge that cooperates with the outer box, and a lower snap-in position is provided on the lower plug-in edge; the inner wall of the outer box is formed with a box body snap-in piece that cooperates with the lower snap-in position.

[0014] Furthermore, in the above technical solution, a receiving member is integrally formed on the inner wall of the outer box near the pivot notch, and the receiving member is upwardly inserted into the lower slot provided on the connecting portion of the box body.

[0015] Furthermore, in the above technical solution, reinforcing ribs are provided between the receiving member and the inner wall of the outer box.

[0016] Furthermore, in the above technical solution, a fixing seat is also installed in the cavity between the outer box and the inner box, and the fixing seat includes: a base plate fixedly connected to the outer box and a column for supporting a circuit board, and a USB interface is arranged horizontally on the circuit board; the support plate in the reinforcing plate is located between the two columns, and avoidance holes and jacks are respectively opened at positions corresponding to the USB interface on the support plate and the side of the outer box.

[0017] Furthermore, in the above technical solution, a bent plate is formed at the end of the support plate in the reinforcing plate, and the bent plate is fixedly connected to the bottom plate of the fixing seat.

[0018] Furthermore, in the above technical solution, a limiting convex strip is formed at the end of the upper pivot part in the first pivot member along the axial direction, and an upper shaft hole for the pivot to pass through is opened on the upper pivot part; two lower pivot parts are provided in the second pivot member, and a lower shaft hole cooperating with the pivot is opened on the lower pivot part, and a pivot rotation position for the limiting convex strip to rotate is formed between the two lower pivot parts, and a limiting protrusion that interferes with the limiting convex strip is provided on the upper side of the pivot rotation position; the upper pivot part is located between the two lower pivot parts, and the upper pivot part and the lower pivot part are connected by a pivot.

[0019] Furthermore, in the above technical solution, fastening slots are formed on the upper side of the second pivotal member and on both sides of the pivotal rotation position, and fastening blocks are formed at the lower plug-in edge of the inner box to be inserted into the fastening slots.

[0020] The present invention has the following advantages after adopting the above-mentioned technical solution: In order to solve the problem that the shell of the double-layer composite structure earphone charging box is relatively thin, the present invention adds a reinforcing plate in the pivot mechanism. The reinforcing plate is usually made of metal plate, which basically does not take up space in the charging box, and provides a strength support between the pivot structure and the shell of the charging box, which can effectively improve the problem of insufficient strength of the thin shell charging box.

[0021] In addition, for a charging box with a USB charging port arranged next to the pivot structure, the USB charging port passes through the middle of the reinforcing plate, and the shell of the charging box is reinforced by the reinforcing plate to ensure the strength of the thin-shell charging box.

[0022] Finally, the present invention has reasonable structural design and is easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional diagram of the present invention in a closed state;

[0024] Figure 2 This is a stereogram of the present invention in an opened state;

[0025] Figure 3It is an exploded perspective view of the present invention;

[0026] Figure 4 It is a three-dimensional exploded view of the pivotal structure of the present invention;

[0027] Figure 5 yes Figure 3 Method diagram at A in the middle;

[0028] Figure 6 yes Figure 1 Middle BB section view;

[0029] Figure 7 is a perspective exploded view of the cover body and the first pivotal member of the present invention;

[0030] Figure 8 It is a three-dimensional exploded view of the box body and the pivot mechanism of the present invention;

[0031] Figure 9 It is a three-dimensional exploded view of the box body and the first pivotal member in the present invention;

[0032] Figure 10 yes Figure 9 Center CC section view. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Figure 1 For reference, when the earphone charging box of the present invention is placed on a horizontal surface, the cover is located at the top and the box body is located at the bottom.

[0034] The present invention is a charging box for storing and charging earphones. Figures 1 to 10 As shown, the present invention includes: a cover body 100 , a box body 200 , a pivoting mechanism 300 , a fixing seat 8 and a circuit board 9 .

[0035] The cover body 100 and the box body 200 are injection molded by plastic material, and both adopt a double-layer composite structure, that is, the cover body 100 includes a nested outer cover 1 and an inner cover 2; the box body 200 includes a nested outer box 4 and an inner box 5, and the cover body 100 and the box body 200 are pivotally connected together by a pivot mechanism 300.

[0036] In the lid body 100, the inner lid 2 is formed with an upper insertion edge 20 that mates with the outer lid 1. An upper snap-fit position 21 is provided on the upper insertion edge 20. The inner wall of the outer lid 1 is formed with a lid snap-fit member 11 that snap-fits with the upper snap-fit position 21. The inner lid 2 is securely nested with the open end of the outer lid 1 via the upper insertion edge 20, and the snap-fit connection between the upper snap-fit position 21 and the lid snap-fit member 11 secures the outer lid 1 to the inner lid 2.

[0037] In the box body 200, the inner box 5 is formed with a lower insertion edge 50 that mates with the outer box 4. A lower snap-fit position 51 is provided on the lower insertion edge 50. The inner wall of the outer box 4 is formed with a box body snap-fitting member 41 that snap-fits with the lower snap-fitting position 51. The inner box 5 is securely nested with the open end of the outer box 4 via the lower insertion edge 50, and the snap-fit connection between the lower snap-fitting position 51 and the box body snap-fitting member 41 secures the outer box 4 to the inner box 5.

[0038] In addition, the inner box 5 is formed with two upper cavities 201 and two lower cavities 501 , and the upper and lower cavities cooperate with each other to form two earphone cavities for placing left and right earphones.

[0039] Combine Figure 6 、 Figure 8 、 Figure 9 As shown, a cavity is formed between the outer box 4 and the inner box 5, and the cavity is used to install a fixing seat 8, a circuit board 9 and circuit elements related to the charging box. The fixing seat 8 is made of plastic. The fixing seat 8 is used to carry the circuit board 9 and circuit elements related to the charging box. Specifically, the fixing seat 8 is a frame structure, which includes: a bottom plate 81 fixedly connected to the outer box 4 and a column 82 for carrying the circuit board 9. Ear plates 83 are provided on both sides of the bottom plate 81, and the ear plates 83 are fixedly connected to the support pins 43 on the inner bottom surface of the outer box 4 by screws. There are at least two columns 82, and the columns 82 extend upward, and the circuit board 9 is fixedly connected to the top surface of the columns 82.

[0040] The circuit board 9 is generally distributed in the horizontal direction, and a USB interface 7 for charging the charging box is provided in the horizontal direction on the circuit board 9. A socket 401 is provided on the side of the outer box 4 corresponding to the position of the USB interface 7.

[0041] The battery 90 of the present invention is disposed below the circuit board 9 and is electrically connected to the circuit board 9. A separator 901 is disposed at the bottom of the circuit board 9 to protect the battery 90. Of course, a cushioning material such as a sponge may also be disposed between the separator 901 and the battery 90.

[0042] Combine Figure 3 、 Figure 4 、 Figure 6 As shown, the pivot mechanism 300 includes a first pivot member 31, a second pivot member 32, a pivot shaft 33 and a reinforcing plate 6. The first pivot member 31 and the second pivot member 32 are injection molded from plastic, and the pivot shaft 33 and the reinforcing plate 6 are made from metal.

[0043] The first pivot member 31 includes an integrally formed cover connecting portion 311 and an upper pivoting portion 312. The cover connecting portion 311 is used for fixed connection with the cover 100, and the upper pivoting portion 312 is used for pivotally connecting with the second pivot member 32.

[0044] The second pivotal member 32 includes an integrally formed box body connecting portion 321 and a lower pivotal portion 322. The box body connecting portion 321 is used for fixed connection with the box body 200, and the lower pivotal portion 322 is used for pivotal connection with the first pivotal member 31.

[0045] The reinforcing plate 6 is a thin metal plate, which is fixed between the outer box 4 and the inner box 5 and is used to provide strength support for the box body 200 and the pivot mechanism 300. The reinforcing plate 6 includes: an integrally formed support plate 61, a plug plate 62 and a bending plate 63. The support plate 61 is abutted against the inner wall of the outer box 4, and the support plate 61 is located between two adjacent columns 82 in the fixing seat 8, and the support plate 61 is clamped and positioned by the two columns 82. Of course, in order to enhance the structural strength, the support plate 61 can be glued to the inner wall of the outer box 4 by glue so that it forms a whole with the outer box 4. In addition, an avoidance hole 60 is provided on the support plate 61 at the position corresponding to the USB interface 7.

[0046] The plug-in plate 62 in the reinforcing plate 6 is connected to the second pivot member 32. A lower slot 3210 is defined on the bottom surface of the box-body connecting portion 321 of the second pivot member 32. During installation, the plug-in plate 62 is inserted upward into the lower slot 3210 defined in the box-body connecting portion 321. To ensure that the support plate 61 rests against the inner wall of the outer box 4 and that the plug-in plate 62 is smoothly inserted into the lower slot 3210, a horizontally bent strip is formed on the support plate 61. This allows the plug-in plate 62 to deflect inward for vertical insertion into the lower slot 3210. The bent strip also acts as a reinforcing rib, further enhancing the torsional strength of the reinforcing plate 6.

[0047] The bent plate 63 in the reinforcing plate 6 is used to reinforce the entire reinforcing plate 6. Figure 6 As shown, the bent plate 63 is inserted above or below the bottom plate 81 of the fixing seat 8 and then fixedly connected to the bottom plate 81 by screws or rivets.

[0048] The pivot mechanism 300 of the present invention requires a certain amount of rotational space during rotational operation. Therefore, a pivot notch 40 is formed on the upper insertion edge 20 of the outer box 4 at a position corresponding to the pivot mechanism 300. The pivot mechanism 300 is installed as follows: the cover connecting portion 311 of the first pivot member 31 is fixedly mounted between the outer cover 1 and the inner cover 2, and the upper pivot portion 312 extends downward from the cover 100 to the pivot notch 40. The box connecting portion 321 of the second pivot member 32 is fixedly mounted between the outer box 4 and the inner box 5, and the lower pivot portion 322 extends upward from the box body 200 to the pivot notch 40. The lower pivot portion 322 is pivotally connected to the upper pivot portion 312 via a pivot shaft 33.

[0049] Specifically, an upper slot 22 is formed on the upper plugging edge 20 of the inner cover 2 near the pivot notch 40; an upper plugging portion 3110 is provided on the cover connecting portion 311 to be plugged into the upper slot 22. Figure 3 、 Figure 7 As shown, the upper slot 22 has a plurality of slot positions, and the upper plug-in portion 3110 is a plurality of plug-in protrusions formed on the inner side of the cover body connecting portion 311. During assembly, the first pivot member 31 is moved from top to bottom to insert the upper plug-in portion 3110 into the corresponding slot position of the upper slot 22. In addition, in order to ensure that the first pivot member 31 does not form a protrusion on the edge of the cover body 100, an inner cover notch 220 is formed on the upper plug-in edge 20 of the inner cover 2 at the position corresponding to the upper slot 22. The depth of the inner cover notch 220 corresponds to the thickness of the cover body connecting portion 311. After assembly, the first pivot member 31 just fills the inner cover notch 220. Similarly, in combination with Figure 5 As shown, an inner box notch 502 is also formed on the edge of the inner box 5 at a position corresponding to the first pivotal member 31 . The depth of the inner box notch 502 corresponds to the thickness of the cover connecting portion 311 .

[0050] A limiting protrusion 3121 is formed at the lowermost end of the upper pivot portion 312 of the first pivot member 31 along the axial direction, and an upper shaft hole 3122 for the pivot shaft 33 to pass through is defined in the upper pivot portion 312 .

[0051] Combine Figure 3 、 Figure 4 、 Figure 6 ,as well as Figures 8 to 10 As shown, two lower pivot parts 322 are provided in the second pivot member 32, and each lower pivot part 322 is provided with a lower shaft hole 3222 that cooperates with the pivot 33, and a pivot rotation position 3221 for the rotation of the limiting protrusion 3121 is formed between the two lower pivot parts 322, and a limiting protrusion 3223 that interferes with the limiting protrusion 3121 is provided on the upper side of the pivot rotation position 3221.

[0052] The upper pivoting portion 312 is located between the two lower pivoting portions 322 , and the upper pivoting portion 312 and the lower pivoting portion 322 are connected via a pivot 33 , thereby achieving a rotatable pivot connection between the first pivoting member 31 and the second pivoting member 32 .

[0053] The box body connection portion 321 has a lower slot 3210 formed upward along its bottom surface. A receiving member 42 is integrally formed on the inner wall of the outer box 4, near the pivot notch 40. This receiving member 42 is inserted upward into the lower slot 3210 formed in the box body connection portion 321. Simultaneously, the plug-in plate 62 in the reinforcing plate 6 is also inserted into the lower slot 3210. An interference fit is formed between the receiving member 42, the plug-in plate 62, and the lower slot 3210, ensuring a secure connection.

[0054] In order to improve the strength of the receiving member 42, a reinforcing rib 421 is provided between the receiving member 42 and the inner wall of the outer box 4. The reinforcing rib 421 provides sufficient support for the receiving member 42 to ensure that the receiving member 42 will not be broken with the outer box 4 during assembly.

[0055] In addition, in order to enhance the stability of the connection between the second pivotal member 32 and the box body 200, fastening slots 3211 are formed on the upper side of the second pivotal member 32 and on both sides of the pivotal rotation position 3221. Figure 5 As shown, a fastening block 511 is formed at the lower insertion edge 50 of the inner box 5 and is inserted into the fastening slot 3211. During installation, the fastening block 511 will be inserted into the fastening slot 3211, thereby simultaneously fixing the upper and lower sides of the second pivot member 32 through the fastening block 511 and the receiving member 42.

[0056] Combine Figure 3 、 Figure 10 As shown, when the pivot mechanism 300 is in operation, when the cover 100 is flipped, the cover 100 drives the first pivot member 31 to rotate along the axis of the pivot 33, and the limiting protrusion 3121 rotates synchronously at the pivot rotation position 3221. When the limiting protrusion 3121 rotates to the limiting protrusion 3223, the cover 100 cannot continue to rotate, thereby forming a limit. When the cover 100 is closed, it can be directly rotated in the opposite direction. Finally, the magnet (not shown) provided between the cover 100 and the box body 200 is used to achieve adsorption and positioning.

[0057] In addition, in order to provide damping for the rotation of the cover body 100, the pivot rotation position 3221 is an arc surface, which corresponds to the trajectory of the limiting protrusion 3121 during rotation, and the limiting protrusion 3121 and the arc surface will form a certain interference, and the interference is used to provide a certain damping for the rotation of the pivot mechanism 300.

[0058] In summary, in order to solve the problem of the thin shell of the double-layer composite structure of the earphone charging box, the present invention adds a reinforcing plate 6 in the pivot mechanism 300 to provide a strength support between the pivot mechanism 300 and the shell of the charging box, which can effectively improve the problem of insufficient strength of the thin shell charging box.

[0059] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. Any equivalent changes or modifications made based on the structure, features and principles described in the scope of the patent application of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. The hinge structure of the thin-shell earphone charging box includes: The cover body (100) and the box body (200) are pivotally connected by a pivot mechanism (300), wherein the cover body (100) comprises an outer cover (1) and an inner cover (2) that fit together; the box body (200) comprises an outer box (4) and an inner box (5) that fit together, wherein a pivot notch (40) is formed at an edge position of the outer box (4) corresponding to the pivot mechanism (300), and the invention is characterized in that: The pivoting mechanism (300) comprises: a first pivoting member (31), a second pivoting member (32), a pivot shaft (33) and a reinforcing plate (6); the first pivoting member (31) comprises an integrally formed cover connecting portion (311) and an upper pivoting portion (312); the second pivoting member (32) comprises an integrally formed box connecting portion (321) and a lower pivoting portion (322); The cover body connecting portion (311) in the first pivot member (31) is fixedly installed between the outer cover (1) and the inner cover (2), and the upper pivot portion (312) extends downward from the cover body (100) to the pivot notch (40); The box body connecting portion (321) in the second pivoting member (32) is fixedly installed between the outer box (4) and the inner box (5), the lower pivoting portion (322) extends upward from the box body (200) to the pivoting notch (40), and the lower pivoting portion (322) is pivotally connected to the upper pivoting portion (312) via the pivot (33); The reinforcing plate (6) is fixed between the outer box (4) and the inner box (5), and comprises an integrally formed support plate (61) and a plug-in plate (62). The support plate (61) is abutted against the inner wall of the outer box (4), and the plug-in plate (62) is inserted upward into a lower slot (3210) provided on the box body connecting portion (321).

2. The hinge structure of the thin-shell earphone charging box according to claim 1, characterized in that: The inner cover (2) is formed with an upper plug-in edge (20) that matches the outer cover (1), and an upper snap-fit position (21) is provided on the upper plug-in edge (20); the inner wall of the outer cover (1) is formed with a cover body snap-fitting member (11) that snap-fits with the upper snap-fit position (21).

3. The hinge structure of the thin-shell earphone charging box according to claim 2, characterized in that: An upper slot (22) is formed at a position of the upper plug-in edge (20) close to the pivot notch (40); and an upper plug-in portion (3110) pluggably engaged with the upper slot (22) is provided on the cover connecting portion (311).

4. The hinge structure of the thin-shell earphone charging box according to claim 1, characterized in that: The inner box (5) is formed with a lower plug-in edge (50) that matches the outer box (4), and a lower snap-in position (51) is provided on the lower plug-in edge (50); the inner wall of the outer box (4) is formed with a box body snap-in member (41) that snap-fits with the lower snap-in position (51).

5. The hinge structure of the thin-shell earphone charging box according to claim 4, characterized in that: A receiving member (42) is integrally formed on the inner wall of the outer box (4) near the pivot notch (40), and the receiving member (42) is inserted upward into a lower slot (3210) provided on the box body connecting portion (321).

6. The pivot structure of the thin-shell earphone charging box according to claim 5, characterized in that: A reinforcing rib (421) is provided between the receiving member (42) and the inner wall of the outer box (4).

7. The hinge structure of the thin-shell earphone charging box according to claim 1, characterized in that: A fixing seat (8) is further installed in the cavity between the outer box (4) and the inner box (5), and the fixing seat (8) comprises: a bottom plate (81) fixedly connected to the outer box (4) and a column (82) for supporting a circuit board (9), and a USB interface (7) is arranged on the circuit board (9) in a horizontal direction; The support plate (61) in the reinforcing plate (6) is located between the two upright posts (82), and a relief hole (60) and a socket (401) are respectively provided at positions corresponding to the USB interface (7) on the side of the support plate (61) and the outer box (4).

8. The pivot structure of the thin-shell earphone charging box according to claim 7, characterized in that: A bent plate (63) is formed at the end of the support plate (61) in the reinforcing plate (6), and the bent plate (63) is fixedly connected to the bottom plate (81) of the fixing seat (8).

9. The pivot structure of the thin-shell earphone charging box according to any one of claims 1 to 8, characterized in that: A limiting convex strip (3121) is formed at the end of the upper pivot portion (312) in the first pivot member (31) along the axial direction, and an upper shaft hole (3122) for the pivot shaft (33) to pass through is formed in the upper pivot portion (312); The second pivot member (32) is provided with two lower pivot portions (322), and the lower pivot portions (322) are provided with lower shaft holes (3222) that cooperate with the pivot shaft (33), a pivot rotation position (3221) for the limiting convex strip (3121) to rotate is formed between the two lower pivot portions (322), and a limiting protrusion (3223) is provided on the upper side of the pivot rotation position (3221) to interfere with the limiting convex strip (3121); The upper pivotal portion (312) is located between the two lower pivotal portions (322), and the upper pivotal portion (312) and the lower pivotal portion (322) are connected via a pivot (33).

10. The pivot structure of the thin-shell earphone charging box according to claim 9, characterized in that: A fastening slot (3211) is formed on the upper side of the second pivoting member (32) and at positions on both sides of the pivoting rotation position (3221), and a fastening block (511) is formed at the lower plug-in edge (50) of the inner box (5) to be inserted into the fastening slot (3211).

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