A storage box

CN224909619UActive Publication Date: 2026-10-27LUXSHARE ELECTRONICS TECH (KUNSHAN) LTD
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Patent Information

Application Number
CN202522326810.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-11-03
Publication Date
2026-10-27
Estimated Expiration
2035-11-03

AI Technical Summary

Technical Problem

[0004]本实用新型的目的在于提出一种收纳盒,既能够便于用户打开收纳盒,又能够通过合盖的过程中增大阻力来避免夹手的问题,同时在收纳盒关闭时提高第一盒体与第二盒体之间的稳定性,提升了用户体验

Benefits of technology

[0022]本实用新型提供了一种收纳盒。该收纳盒中,第一盒体与第二盒体通过转轴转动连接,且第一盒体在相对于第二盒体转动的过程中,弹性组件始终与阻尼槽滑动抵接,故能够为第一盒体和第二盒体之间的转动提供阻尼。而且,第一盒体相对于第二盒体打开的过程中,弹性组件与阻尼槽产生的阻尼逐渐减小,既能够便于用户打开收纳盒,又能够通过合盖的过程中增大阻力来避免夹手的问题,同时在收纳盒关闭时提高第一盒体与第二盒体之间的稳定性,提升了用户体验感。

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Abstract

The utility model discloses a kind of storage boxes, it is related to electronic equipment technical field.The storage box includes first box body, second box body and pivot;Second box body is provided with connecting hole, and elastic component is set in second box body and can be inserted into connecting hole by the inner wall of connecting hole;Pivot is worn in connecting hole, pivot is connected with first box body to make pivot and first box body relative second box body synchronous rotation, pivot is provided with damping slot, and elastic component is slidably abutted in damping slot, in the process that first box body is opened relative second box body, the damping generated by elastic component and damping slot gradually reduces.The storage box can not only facilitate user to open storage box, but also can increase resistance in the process of closing to avoid the problem of hand clamping, improve the stability between first box body and second box body when storage box is closed, improve user experience.
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Description

Technical Field

[0001] This invention relates to the field of electronic device technology, and more particularly to a storage box. Background Technology

[0002] With the advancement of technology, wireless headphones have become increasingly popular due to their compact size, portability, and ease of use. To store and charge wireless headphones, they need to be placed in a compatible charging case.

[0003] Storage boxes consist of a rotating body and a lid. To improve the user experience and prevent the lid from wobbling when rotating relative to the body, a damping structure is usually installed at the pivot point. However, the damping generated by the damping structure is usually a constant value. If the damping is too high, it will make it difficult to open the lid; if the damping is too low, it will cause fingers to be pinched when closing the lid or the lid to be unstable when it is locked to the body, resulting in a poor user experience. Summary of the Invention

[0004] The purpose of this invention is to provide a storage box that is easy for users to open, increases resistance during the closing process to prevent fingers from being pinched, and improves the stability between the first and second boxes when the storage box is closed, thereby enhancing the user experience.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A storage box, comprising:

[0007] First box;

[0008] The second box body has a connection hole;

[0009] An elastic component, which is disposed within the second housing and is capable of extending into the connection hole through the inner wall of the connection hole;

[0010] A rotating shaft passes through the connecting hole and is connected to the first housing so that the rotating shaft and the first housing rotate synchronously relative to the second housing. The rotating shaft has a damping groove, and the elastic component slides against the damping groove. During the opening of the first housing relative to the second housing, the damping generated by the elastic component and the damping groove gradually decreases.

[0011] As an optional solution for the above-mentioned storage box, the rotating shaft has an open position and a closed position, the damping groove includes a variable damping surface, the elastic component slides against the variable damping surface, the variable damping surface includes a first damping segment, and along the direction of rotation from the closed position to the open position of the rotating shaft, the radial distance between the side of the first damping segment near the axis of the rotating shaft and the axis of the rotating shaft gradually increases.

[0012] As an optional embodiment of the above-mentioned storage box, the variable damping surface includes a second damping section, and along the direction of rotation from the closed position to the open position along the axis of rotation, the second damping section is located upstream of the first damping section, and the radial distance between the side of the second damping section adjacent to the axis of rotation and the axis of rotation is equal.

[0013] As an optional solution for the aforementioned storage box, the damping groove includes a position limiting surface, which is located upstream of the variable damping surface along the direction of rotation from the closed position to the open position along the rotating shaft. The position limiting surface can abut against the elastic component to limit the rotating shaft to the open position.

[0014] As an alternative to the aforementioned storage box, along the circumference of the rotating shaft, the central angle corresponding to the damping groove is α, then α≥90°.

[0015] As an optional solution for the aforementioned storage box, a plurality of damping grooves are formed along the circumference of the rotating shaft, and the second box body is provided with the elastic component corresponding to each of the damping grooves; and / or,

[0016] Along the axial direction of the rotating shaft, the rotating shaft is provided with a plurality of damping grooves, and the second housing is provided with an elastic component for each of the damping grooves.

[0017] As an alternative to the aforementioned storage box, the telescopic axis of the elastic component intersects and is perpendicular to the axis of the rotating shaft.

[0018] As an optional solution for the above-mentioned storage box, the first box body has a fixing hole, the outer peripheral surface of the rotating shaft is provided with a first limiting surface, the inner wall of the fixing hole is provided with a second limiting surface, the rotating shaft is disposed in the fixing hole, and the first limiting surface and the second limiting surface abut against each other to limit the angle between the first connecting part and the rotating shaft.

[0019] As an optional solution for the above-mentioned storage box, the first box body also includes a limiting pin, and the outer peripheral surface of the rotating shaft is provided with a limiting groove, and the limiting pin is engaged in the limiting groove.

[0020] As an optional solution for the above-mentioned storage box, the first box body has a first connecting part, the second box body has a second connecting part, the first connecting part includes two connecting segments spaced apart, the second connecting part is located between the two connecting segments, one end of the rotating shaft is connected to one of the connecting segments, and the other end of the rotating shaft is connected to the other connecting segment.

[0021] The beneficial effects of this utility model are:

[0022] This invention provides a storage box. In this storage box, a first box body and a second box body are rotatably connected by a pivot. During the rotation of the first box body relative to the second box body, an elastic component always slides against a damping groove, thus providing damping for the rotation between the first and second box bodies. Furthermore, as the first box body opens relative to the second box body, the damping generated by the elastic component and the damping groove gradually decreases. This not only facilitates opening the storage box but also increases resistance during closing to prevent pinching of fingers. Simultaneously, it improves the stability between the first and second box bodies when the storage box is closed, enhancing the user experience. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the storage box in the open state according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the second connecting part provided in one embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the rotating shaft in the closed position according to an embodiment of the present invention;

[0026] Figure 4 yes Figure 3 A magnified view of a section at point A in the middle;

[0027] Figure 5 This is a schematic diagram of the structure of the rotating shaft in the open position according to an embodiment of the present invention;

[0028] Figure 6 yes Figure 5 A magnified view of a section at point B in the middle;

[0029] Figure 7 This is a schematic diagram of the structure of a rotating shaft provided in one embodiment of the present invention;

[0030] Figure 8 This is a schematic diagram of the structure of the first connecting part provided in one embodiment of the present invention;

[0031] Figure 9 This is a cross-sectional view of the first connecting part, the second connecting part, and the rotating shaft provided in one embodiment of the present utility model.

[0032] In the picture:

[0033] 1. First housing; 11. First connecting part; 111. Fixing hole; 112. Second limiting surface; 12. Connecting section; 13. Limiting pin;

[0034] 2. Second housing; 21. Second connecting part; 22. Connecting hole;

[0035] 3. Rotating shaft; 31. Damping groove; 311. Variable damping surface; 3111. First damping section; 3112. Second damping section; 312. Snap-fit ​​groove; 313. Position limiting surface; 32. Limiting groove; 33. First limiting surface;

[0036] 4. Elastic component; 41. Pin; 42. Elastic element. Detailed Implementation

[0037] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0038] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0039] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] Unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0042] This embodiment provides a storage box, such as Figure 1 As shown, the storage box includes a first box body 1, a second box body 2, and a pivot 3. The first box body 1 is rotatably connected to the second box body 2 via the pivot 3. When the first box body 1 and the second box body 2 are fastened together, a storage space for accommodating wireless earphones is formed inside the first box body 1 and the second box body 2. When the first box body 1 is opened relative to the second box body 2, the user can take out the wireless earphones for use.

[0043] It is worth noting that in this embodiment, the functions of the first box 1 and the second box 2 are not distinguished. The first box 1 can be a lid, and the second box 2 can also be a lid, as long as the first box 1 and the second box 2 can be rotated relative to each other to open or close the storage box.

[0044] like Figure 1 and Figure 2 As shown, to facilitate the connection between the first box 1 and the second box 2, the first box 1 has a first connecting part 11, and the second box 2 has a second connecting part 21. The second connecting part 21 has a connecting hole 22, through which a rotating shaft 3 passes. The rotating shaft 3 is connected to the first connecting part 11 so that the rotating shaft 3 and the first box 1 rotate synchronously relative to the second box 2. That is, when the user rotates the first box 1, the first box 1 drives the rotating shaft 3 to rotate within the connecting hole 22, thereby realizing the relative rotation of the first box 1 and the second box 2.

[0045] To improve the user's handling experience, the storage box also includes a damping structure. The damping structure is located between the pivot 3 and the second connecting part 21. The damping structure can provide damping for the relative rotation of the first box 1 and the second box 2, preventing the first box 1 from shaking when rotating relative to the second box 2, and improving the stability of the storage box when opening and closing.

[0046] However, the damping generated by the damping structure is usually a constant value, which does not change with the position of the first box 1. If the damping is set too high, it will make it difficult to open the lid; if the damping is set too low, it will cause fingers to be pinched when closing the lid or make it difficult for the lid to remain stable when it is locked to the box, resulting in a poor user experience.

[0047] To address the aforementioned issues, in this embodiment, the damping structure can change its damping value as the shaft 3 rotates. Specifically, as the first box 1 opens relative to the second box 2, the damping generated by the damping structure gradually decreases.

[0048] As the first box 1 opens relative to the second box 2, the damping of the rotating shaft gradually decreases. This makes it easier for users to open the storage box, while increasing resistance during the closing process to prevent fingers from being pinched. At the same time, it improves the stability between the first box 1 and the second box 2 when the storage box is closed, thus enhancing the user experience.

[0049] In some embodiments, the damping structure includes a spring, which is sleeved on the rotating shaft 3, with one end of the spring connected to the rotating shaft 3 and the other end connected to the second connecting part 21. The spring is characterized in that its bending stiffness changes with the amount of deformation, thereby enabling the damping of the rotating shaft 3 to be changed as the rotating shaft 3 rotates.

[0050] In some embodiments, an eccentric wheel is provided on the rotating shaft 3, and a spring-loaded pin is provided on the inner wall of the connecting hole 22. The outer periphery of the eccentric wheel slides against the spring-loaded pin. As the rotating shaft 3 rotates, the compression amount of the spring-loaded pin at different positions against the outer periphery of the eccentric wheel is different, which causes the friction between the spring-loaded pin and the eccentric wheel to change with the rotation of the rotating shaft 3, thereby changing the damping of the rotating shaft 3 with the rotation of the rotating shaft 3.

[0051] like Figures 2-6 As shown, the second box 2 is provided with an elastic component 4, which is disposed in the second connecting part 21 and can pass through the inner wall of the connecting hole 22 and extend into the connecting hole 22; the rotating shaft 3 is provided with a damping groove 31, and the elastic component 4 slides against the damping groove 31. During the opening of the first box 1 relative to the second box 2, the damping generated by the elastic component 4 and the damping groove 31 gradually decreases.

[0052] In this storage box, the first box body 1 and the second box body 2 are rotatably connected by a pivot 3. During the rotation of the first box body 1 relative to the second box body 2, the elastic component 4 of the pivot 3 is always in sliding contact with the damping groove 31, thus providing damping for the rotation between the first box body 1 and the second box body 2. In other words, the elastic component 4 and the damping groove 31 of the pivot 3 together constitute a damping structure.

[0053] In this embodiment, for ease of describing the state of the hinge 3, the hinge 3 has an open position and a closed position. When the hinge 3 is in the open position, the storage box is in the open state, the first box 1 no longer blocks the second box 2, and the user can take out and put in the wireless earphones. When the hinge 3 is in the closed position, the storage box is in the closed state, the first box 1 blocks the second box 2, and the wireless earphones are sealed inside the storage box.

[0054] In this embodiment, the damping groove 31 includes a variable damping surface 311. The elastic component 4 slides against the variable damping surface 311. The variable damping surface 311 includes a first damping segment 3111, and the radial distance between the side of the first damping segment 3111 adjacent to the axis of the rotating shaft 3 and the axis of the rotating shaft 3 gradually increases along the direction of rotation from the closed position to the open position (X direction in the figure). When the rotating shaft 3 rotates from the closed position to the open position, the elastic component 4 moves in the opposite direction relative to the rotating shaft 3, causing the compression of the elastic component 4 to gradually decrease, thereby reducing the pressure of the elastic component 4 on the damping groove 31 of the rotating shaft 3, and gradually reducing the damping of the rotation of the rotating shaft 3.

[0055] Furthermore, the variable damping surface 311 includes a second damping segment 3112, which is located upstream of the first damping segment 3111 along the direction of rotation from the closed position to the open position on the rotating shaft 3. The radial distance between the side of the second damping segment 3112 adjacent to the axis of the rotating shaft 3 and the axis of the rotating shaft 3 is equal. As the opening angle of the first housing 1 relative to the second housing 2 increases, the elastic component 4 slides from the first damping segment 3111 to the second damping segment 3112. At this time, the damping between the first housing 1 and the second housing 2 is small and remains unchanged. When the user continues to increase the opening angle of the first housing 1 relative to the second housing 2, the damping feel remains stable.

[0056] In this embodiment, the central angle corresponding to the damping groove 31 along the circumference of the rotating shaft 3 is α, then α ≥ 90°. That is to say, the rotation angle range of the rotating shaft 3 assembly is at least 90°. When the opening angle of the first housing 1 relative to the second housing 2 reaches 90°, the first housing 1 does not completely block the second housing 2. This can be used as a critical value for the user to be able to take out and put away the wireless earphones.

[0057] Preferably, the central angle corresponding to the first damping section 3111 is 90°. During the opening of the storage box, as the opening angle of the first box 1 relative to the second box 2 increases from 0° to 90°, the damping of the rotating shaft 3 gradually decreases, making it easier for the user to rotate the first box 1. Then, as the opening angle of the first box 1 relative to the second box 2 continues to increase, the elastic component 4 slides on the second damping section 3112, and the damping of the rotating shaft 3 no longer changes.

[0058] like Figure 4As shown, in order to ensure that the rotating shaft 3 can be stably kept in the open position to guarantee the open state of the storage box, the damping groove 31 includes a position limiting surface 313. Along the direction of rotation of the rotating shaft 3 from the closed position to the open position, the position limiting surface 313 is located upstream of the variable damping surface 311. The position limiting surface 313 can abut against the elastic component 4 to limit the rotating shaft 3 to the open position. The position limiting surface 313 is equivalent to the end face of one end of the damping groove 31. When the elastic component 4 abuts against the position limiting surface 313, the rotating shaft 3 cannot continue to rotate, and the opening angle between the first box 1 and the second box 2 is at its maximum value, making it convenient for the user to take out and put in the wireless earphones.

[0059] like Figure 5 As shown, the damping groove 31 also includes a snap-fit ​​groove 312. Along the direction of rotation of the shaft 3 from the closed position to the open position, the snap-fit ​​groove 312 is located downstream of the variable damping surface 311. When the shaft 3 is in the closed position, the elastic component 4 snaps into the snap-fit ​​groove 312. The snap-fit ​​groove 312 improves the stability of the storage box when it is closed, preventing relative rotation between the first box body 1 and the second box body 2 and avoiding the loss of the wireless earphones.

[0060] It is worth noting that the elastic component 4 includes an elastic element 42 and a pin 41. The two ends of the elastic element 42 abut against the second connecting part 21 and the pin 41, respectively. The pin 41 abuts against the damping groove 31. Moreover, the front end of the pin 41 is spherical, and the front end of the pin 41 can engage or disengage from the locking groove 312. The spherical front end of the pin 41 can not only fix the rotating shaft 3 in the closed position by engaging with the locking groove 312, thereby ensuring the stability of the storage box, but also unlock the box by disengaging the pin 41 from the locking groove 312 when the user drives the rotating shaft 3 to the open position through the first box body 1.

[0061] In this embodiment, the telescopic axis of the elastic component 4 intersects and is perpendicular to the axis of the rotating shaft 3. That is, the direction of the force exerted by the elastic component 4 is radially through the axis of the rotating shaft 3. This structure enables the forces between the elastic component 4 and the rotating shaft 3 to reach a balanced state, preventing the elastic component 4 from shifting when subjected to the reaction force of the rotating shaft 3.

[0062] like Figure 7 As shown, multiple damping grooves 31 are provided on the rotating shaft 3 along its circumference. The second housing 2 is provided with an elastic component 4 for each damping groove 31. The multiple sets of elastic components 4 can provide damping to the rotating shaft 3 with the corresponding damping grooves 31. On the one hand, this can make the damping distribution more uniform when the rotating shaft 3 rotates. On the other hand, it can also reduce the elastic force of each elastic component 4, thereby selecting a lightweight elastic component 42 and reducing costs.

[0063] Preferably, the rotating shaft 3 has three damping grooves 31, and the central angle of each damping groove 31 is 120°. That is to say, the maximum opening angle between the first box 1 and the second box 2 is 120°.

[0064] like Figure 7 As shown, multiple damping grooves 31 are provided on the rotating shaft 3 along its axial direction, and an elastic component 4 is provided on the second housing 2 for each damping groove 31. This structure ensures that the damping of the rotating shaft 3 is evenly distributed along the axial direction, so that the user can rotate the rotating shaft 3 from any end with the same feel.

[0065] like Figure 8 As shown, the first connecting part 11 has a fixing hole 111, the outer peripheral surface of the rotating shaft 3 is provided with a first limiting surface 33, and the inner wall of the fixing hole 111 is provided with a second limiting surface 112. The rotating shaft 3 is disposed in the fixing hole 111, and the first limiting surface 33 and the second limiting surface 112 abut against each other to limit the angle of the first connecting part 11 and the rotating shaft 3. The abutment between the first limiting surface 33 and the second limiting surface 112 enables the first housing 1 and the rotating shaft 3 to rotate synchronously, and can evenly distribute the force between the first connecting part 11 and the rotating shaft 3 along the rotation direction, reducing the possibility of damage due to excessive local force and extending the service life.

[0066] like Figure 1 and Figure 9 As shown, the first housing 1 also includes a limiting pin 13, and a limiting groove 32 is provided on the outer peripheral surface of the rotating shaft 3. The limiting pin 13 passes through the first connecting part 11 and is engaged in the limiting groove 32. The limiting pin 13 can position the rotating shaft 3 and the first connecting part 11 in the axial direction of the rotating shaft 3, thereby ensuring the relative stability between the first housing 1 and the second housing 2.

[0067] In this embodiment, the first connecting part 11 includes two connecting segments 12 spaced apart, the second connecting part 21 is located between the two connecting segments 12, one end of the rotating shaft 3 is connected to one connecting segment 12, and the other end of the rotating shaft 3 is connected to the other connecting segment 12.

[0068] Two connecting sections 12 are respectively set at both ends of the second connecting part 21, so that the first box 1, the second box 2 and the rotating shaft 3 are subjected to balanced forces. The storage box as a whole has a mirror-symmetrical structure. When the user rotates the first box 1, the two connecting sections 12 can simultaneously apply rotational force to the rotating shaft 3, which can also ensure that the rotating shaft 3 is subjected to balanced forces.

[0069] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A storage box, characterized in that, include: First box; The second box body has a connection hole; An elastic component, which is disposed within the second housing and is capable of extending into the connection hole through the inner wall of the connection hole; A rotating shaft passes through the connecting hole and is connected to the first housing so that the rotating shaft and the first housing rotate synchronously relative to the second housing. The rotating shaft has a damping groove, and the elastic component slides against the damping groove. During the opening of the first housing relative to the second housing, the damping generated by the elastic component and the damping groove gradually decreases.

2. The storage box according to claim 1, characterized in that, The rotating shaft has an open position and a closed position. The damping groove includes a variable damping surface. The elastic component slides against the variable damping surface. The variable damping surface includes a first damping segment. Along the direction of rotation of the rotating shaft from the closed position to the open position, the radial distance between the side of the first damping segment near the axis of the rotating shaft and the axis of the rotating shaft gradually increases.

3. The storage box according to claim 2, characterized in that, The variable damping surface includes a second damping section, and along the direction of rotation from the closed position to the open position along the axis of rotation, the second damping section is located upstream of the first damping section, and the radial distance between the side of the second damping section adjacent to the axis of rotation and the axis of rotation is equal.

4. The storage box according to claim 2, characterized in that, The damping groove includes a position limiting surface, which rotates along the axis from the closed position to the open position. The position limiting surface is located upstream of the variable damping surface and can abut against the elastic component to limit the axis to the open position.

5. The storage box according to claim 1, characterized in that, Along the circumference of the axis of rotation, the central angle corresponding to the damping groove is α, then α≥90°.

6. The storage box according to claim 1, characterized in that, Along the circumference of the rotating shaft, the rotating shaft is provided with a plurality of damping grooves, and the second housing is provided with the elastic component corresponding to each of the damping grooves; and / or, Along the axial direction of the rotating shaft, the rotating shaft is provided with a plurality of damping grooves, and the second housing is provided with an elastic component for each of the damping grooves.

7. The storage box according to claim 1, characterized in that, The telescopic axis of the elastic component intersects and is perpendicular to the axis of the rotating shaft.

8. The storage box according to any one of claims 1 to 7, characterized in that, The first box body has a fixing hole, the outer peripheral surface of the rotating shaft is provided with a first limiting surface, the inner wall of the fixing hole is provided with a second limiting surface, the rotating shaft is disposed in the fixing hole, and the first limiting surface and the second limiting surface abut against each other to limit the angle of the first box body and the rotating shaft.

9. The storage box according to any one of claims 1 to 7, characterized in that, The first box body also includes a limiting pin, and the outer peripheral surface of the rotating shaft is provided with a limiting groove, into which the limiting pin is engaged.

10. The storage box according to any one of claims 1 to 7, characterized in that, The first box has a first connecting part, and the second box has a second connecting part. The first connecting part includes two connecting segments spaced apart. The second connecting part is located between the two connecting segments. One end of the rotating shaft is connected to one of the connecting segments, and the other end of the rotating shaft is connected to the other connecting segment.