Flip structure and earphone case
By setting a limiting part and mounting holes on the hinge seat of the headphone case, the movement stroke of the elastic element is limited, which solves the problem of the elastic element in the headphone case being easy to detach, and improves the stability and reliability of the flip structure.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN GRANDSUN ELECTRONICS CO LTD
- Filing Date
- 2025-04-21
- Publication Date
- 2026-06-16
AI Technical Summary
In the prior art, the elastic components of the headphone case are easily affected by impact loads during repeated opening and closing, which can lead to loosening or even detachment of the assembly. Furthermore, a large opening angle increases internal stress, affecting stability and reliability.
A flipping structure is designed, which limits the travel of the elastic element by setting a limiting part and a mounting hole on the hinge seat, so that its two ends are kept in the mounting hole respectively to avoid detachment. A multi-segment bent connecting rod and a spiral structure are used to buffer the force during the flipping process.
The stability and reliability of the headphone case's flip structure have been improved, preventing the elastic parts from coming loose, ensuring a smooth and stable flipping action, and allowing for flexible control of the opening angle.
Smart Images
Figure CN224367925U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electronic equipment technology, and in particular to a flip structure and an earphone case. Background Technology
[0002] In related technologies, elastic components, such as torsion springs or sheet springs, are typically installed between the earphone case and the lid. The elastic deformation of these components generates resistance, ensuring stable operation when the lid is open or reliably locked when closed, preventing accidental operation. To facilitate the placement and removal of earphones, a larger opening angle is required. However, a larger opening angle leads to a corresponding increase in the deformation of the elastic component, resulting in a significant rise in its internal stress. Furthermore, since elastic components often use insert-type open connecting posts or limiting grooves for fixation, they are susceptible to impact loads during repeated opening and closing, leading to loosening of the assembly or even failure where the elastic component detaches from the connection between the earphone case and the lid. Utility Model Content
[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a flipping structure that can limit the end travel of the elastic element, keeping both ends of the elastic element within their respective mounting holes, thus preventing the elastic element from detaching from its corresponding connecting part.
[0004] This utility model also provides an earphone case with the above-mentioned flip structure.
[0005] In a first aspect, embodiments of this application provide a flipping structure, including:
[0006] Two hinge seats are rotatably connected to each other, one of the hinge seats is used to connect to the box body, and the other hinge seat is used to connect to the box cover; the hinge seat has a connecting part and a limiting part spaced apart along a first direction, the connecting part has a mounting hole extending along the first direction, the first direction being parallel to the rotation axis when the two hinge seats rotate relative to each other;
[0007] An elastic element, the two ends of which are rotatably disposed in the mounting holes of the two hinge seats, and both ends of the elastic element are movable along a first direction;
[0008] The limiting part is used to stop the elastic member when the end of the elastic member moves in the first direction, so as to limit the movement of the end of the elastic member in the first direction, so that the two ends of the elastic member are respectively kept in the mounting holes of the two hinge seats.
[0009] The flip structure according to the present invention has at least the following beneficial effects: when the cover is opened and closed, the elastic element is deformed under pressure, and the limiting part can stop the elastic element when it moves along the first direction, thereby limiting the travel of the end of the elastic element, keeping the two ends of the elastic element in the corresponding mounting holes, preventing the elastic element from separating from the corresponding connecting part, and ensuring the stability and reliability of the entire flip structure.
[0010] According to the first aspect, in one possible implementation, at least one of the hinge seats has a limiting groove extending along a first direction, the limiting groove being located between the connecting portion and the limiting portion;
[0011] The elastic element is configured such that a portion of the structure abuts against the wall of the limiting groove during compression deformation and slides along the wall of the limiting groove.
[0012] According to the first aspect, in one possible implementation, the two hinge seats include a first hinge seat and a second hinge seat, the first hinge seat being for connection with the housing body, and the second hinge seat being for connection with the housing cover, the second hinge seat having a first position and a second position;
[0013] When the second hinge seat is in the first position, the lid closes the box body, and the elastic element is in a compressed state; and / or,
[0014] When the second hinge seat is in the second position, the lid opens the box body, and the elastic element is in a compressed state.
[0015] According to the first aspect, in one possible implementation, the first hinge seat includes a main frame and two hinge portions spaced apart along a first direction, the main frame enclosing an avoidance space, the main frame being provided with the connecting portion and the limiting portion; the hinge portions protrude from the main frame toward the outside of the box body;
[0016] The second hinge seat is disposed between the two hinge parts and is rotatably connected to the two hinge parts via a pivot; when the second hinge seat is in the second position, a portion of the structure of the second hinge seat extends into the clearance space.
[0017] According to the first aspect, in one possible implementation, the main frame has a limiting beam located at the top of the clearance space; the limiting beam has a first limiting surface on the side opposite to the clearance space or along the second direction, and when the second hinge seat is in the first position, the second hinge seat abuts against the first limiting surface; and / or,
[0018] The limiting beam forms a second limiting surface on the side facing the clearance space. When the second hinge seat is in the second position, the second hinge seat abuts against the second limiting surface.
[0019] According to the first aspect, in one possible implementation, a mounting groove is formed at the top of the main frame, the mounting groove being for insertion of a protruding structure of the box body; and / or,
[0020] The first hinge seat also includes two connecting ears disposed on both sides of the main frame along the first direction, the connecting ears being used to connect with the box body.
[0021] According to the first aspect, in one possible implementation, the second hinged seat includes a rotating base and a mounting portion connected to each other;
[0022] The rotating base is located between the two hinge parts and connected to the two hinge parts via a rotating shaft, and the mounting part is used to connect to the box cover.
[0023] According to the first aspect, in one possible implementation, when the second hinge seat is in the first position, the rotating base abuts against one side of the main frame along the second direction, or the portion of the mounting part protruding from the rotating base along the second direction abuts against the top of the main frame; and / or,
[0024] When the second hinge seat is in the second position, the end of the rotating base away from the mounting part abuts against the top wall of the clearance space.
[0025] According to the first aspect, in one possible implementation, the elastic element includes multiple bent connecting rods, with one or more spiral structures formed at the connection points of two adjacent connecting rods, and the two connecting rods at both ends are inserted into the two mounting holes in a one-to-one correspondence, and the spiral structure connected to the connecting rod at the end is limited between the connecting portion and the limiting portion.
[0026] Secondly, this application also provides an earphone case, which includes a case body, a lid, and the flip structure described in the first aspect. The case body is connected to one of the hinge seats, and the lid is connected to the other hinge seat. The lid is rotatable relative to the case body to open or close the case body.
[0027] The earphone case according to the present utility model embodiment has at least the following beneficial effects: by applying the above-mentioned flip structure, when the opening and closing operations are performed, the elastic element is deformed under pressure, and the limiting part can stop the elastic element when it moves along the first direction, thereby limiting the travel of the end of the elastic element, keeping the two ends of the elastic element in the corresponding mounting holes, preventing the elastic element from separating from the corresponding connecting part, and ensuring the stability and reliability of the entire flip structure.
[0028] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:
[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:
[0031] Figure 1 This is a schematic diagram of the headphone case in an embodiment of the present invention;
[0032] Figure 2 This is a cross-sectional structural diagram of the earphone case in an embodiment of this utility model;
[0033] Figure 3 This is a schematic diagram showing the assembly relationship between the flexible conductive structure and the flipping structure in an embodiment of this utility model;
[0034] Figure 4 This is a schematic diagram of the flipping structure in an embodiment of the present invention;
[0035] Figure 5 This is a disassembled structural diagram of the flipping structure in an embodiment of this utility model;
[0036] Figure 6 This is a cross-sectional view of the flipping structure in an embodiment of the present invention.
[0037] Figure label:
[0038] 1000, Flip structure; 100, Hinge seat; 110, Connecting part; 111, Mounting hole; 120, Limiting part; 200, First hinge seat; 220, First connecting part; 230, First limiting part; 240, Limiting groove; 250, Main frame; 251, Limiting beam; 252, Clearance space; 260, Hinge part; 270, Mounting groove; 280, Connecting ear; 300, Second hinge seat; 330, Second connecting part; 340, Second limiting part; 350, Rotating base; 360, Mounting part; 400, Elastic element; 410, Connecting rod; 420, Spiral structure; 500, Rotating shaft; 2000, Earphone case; 2001, Case body; 2002, Case cover; 2003, Flexible conductive structure. Detailed Implementation
[0039] The embodiments of this utility model are described in detail below. Examples of these 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 are only used to explain this utility model, and should not be construed as limiting this utility model.
[0040] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.
[0041] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.
[0042] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0043] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0044] In related technologies, elastic components, such as torsion springs or sheet springs, are typically installed between the earphone case and the lid. The elastic deformation of these components generates resistance, ensuring stable opening or reliable locking of the lid when closed, preventing accidental operation. To facilitate the removal and placement of earphones, a larger opening angle is required. However, a larger opening angle leads to a corresponding increase in the deformation of the elastic component, resulting in a significant rise in its internal stress. Furthermore, since elastic components often use insert-type open connecting posts or limiting grooves for fixation, they are susceptible to impact loads during repeated opening and closing, leading to loosening of the assembly or even failure where the elastic component detaches from the connection between the earphone case and the lid.
[0045] This utility model proposes a flipping structure, such as Figures 1 to 5 As shown, in some embodiments, the flip structure 1000 includes two hinge seats 100 and an elastic member 400 connected between the two hinge seats 100. The two hinge seats 100 are rotatably connected, one of which is connected to the box body 2001 and the other is connected to the box lid 2002. The opening and closing of the lid are achieved by rotating the hinge seats 100. Each hinge seat 100 is designed with a connecting portion 110 and a limiting portion 120 spaced apart along a first direction. The connecting portion 110 has a mounting hole 111 extending along the first direction. The two ends of the elastic member 400 are rotatably disposed in the two mounting holes 111, and the two ends of the elastic member 400 are movable along the first direction. When the lid is opened and closed, the elastic element 400 is deformed by pressure. While the two ends of the elastic element 400 rotate, they also move along the first direction. The limiting part 120 can stop the elastic element 400, thereby limiting the movement of the ends of the elastic element 400 along the first direction, so that the two ends of the elastic element 400 are respectively kept in the mounting holes 111 of the two hinge seats 100, preventing the elastic element 400 from disengaging from the corresponding connecting part 110, and improving the stability and reliability of the flip structure 1000.
[0046] There is a certain amount of space between the connecting part 110 and the limiting part 120, meaning that both ends of the elastic member 400 can adapt to the deformation of the elastic member 400 by moving along the first direction, avoiding excessive movement on one side. Furthermore, the edge of the mounting hole 111 is a continuous closed circle in the circumferential direction, meaning that there is no groove on the connecting part 110 that communicates with the side wall of the mounting hole 111. While keeping the end of the elastic member 400 within the mounting hole 111, the elastic member 400 cannot dislodge from the side wall of the mounting hole 111. Therefore, by designing the compression amount of the elastic member 400, it can adapt to larger flipping angles, such as 95°, 100°, 110°, etc., which this application does not limit.
[0047] Furthermore, the inner diameter of the mounting hole 111 can be larger than the diameter of the portion of the elastic element 400 that extends into the mounting hole 111, providing ample space for the movement of the elastic element 400 within the mounting hole 111. This allows the elastic element 400 to rotate to a certain extent and move in the left and right directions within the mounting hole 111 without being excessively restricted by the hole wall.
[0048] The dimensions of the movable spaces of the two hinge seats 100 in the left-right direction may be the same or different, and this application does not limit this. However, when the dimensions of the movable spaces of the two hinge seats 100 in the left-right direction are different, the larger movable space needs to be provided with a limiting structure to support the part of the elastic member 400 located in the movable space. For example, a limiting groove 240 extending in the first direction is formed by the side wall of the movable space. When the elastic member 400 is compressed and deformed, part of the structure of the elastic member 400 abuts against the groove wall of the limiting groove 240 and slides along the groove wall of the limiting groove 240 to prevent the end structure of the elastic member 400 from bending and deforming, and to ensure the smooth movement of the end of the elastic member 400 in the mounting hole 111.
[0049] For ease of distinction, the hinge seat 100 connected to the box body 2001 is defined as the first hinge seat 200, and the hinge seat 100 connected to the box cover 2002 is defined as the second hinge seat 300. The first hinge seat 200 is defined as the fixed end, and the second hinge seat 300 rotates relative to the first hinge seat 200, thus its up / down, left / right, and forward / backward movements are based on the first hinge seat 200. Figure 2 As shown, the first direction is left and right, and the second direction is front and back.
[0050] The second hinge seat 300 has a first position and a second position. When the second hinge seat 300 is in the first position, the lid 2002 closes the box body 2001; when the second hinge seat 300 is in the second position, the lid 2002 opens the box body 2001. Regardless of whether the hinge seat 100 is in the first position or the second position, the elastic element 400 is in a compressed state, thereby providing a certain resistance force to the lid 2002, keeping the second hinge seat 300 and the lid 2002 in their current state and avoiding misoperation.
[0051] The second hinge seat 300 rotates from the first position to the second position to open the lid, and rotates from the second position to the first position to close the lid. Both opening and closing actions are achieved by rotating the lid 2002, which drives the second hinge seat 300 to rotate. During this rotation, the second hinge seat 300 further compresses the spring. When the rotation reaches a certain angle—specifically, when the hinge point between the second hinge seat 300 and the first hinge seat 200, the connection point between the elastic element 400 and the first connecting part 220, and the connection point between the elastic element 400 and the second connecting part 330 are collinear—the compression of the elastic element 400 is at its maximum. As the second hinge seat 300 continues to rotate, the elastic element 400 partially recovers its deformation, and the elastic force of the elastic element 400 acts on the second hinge seat 300, pushing it to continue rotating until it reaches the second or first position, completing the opening or closing action.
[0052] In some embodiments, such as Figure 6 As shown, the elastic element 400 includes multiple bent connecting rods 410. The connection points of adjacent connecting rods 410 form one or more spiral structures 420. The expansion or contraction of the spiral structure 420 stores and releases energy, effectively buffering and regulating the force during the flipping process, ensuring smooth and stable flipping. The two connecting rods 410 at both ends are inserted into the two mounting holes 111, achieving a stable connection between the elastic element 400 and the two hinge seats 100. The spiral structure 420 connected to the connecting rods 410 at the ends is confined between the connecting portion 110 and the limiting portion 120, thereby limiting the travel of the ends of the elastic element 400.
[0053] For example, the elastic element 400 may include three connecting rods 410 arranged in a Z-shape, and correspondingly, two helical structures 420. The connecting rods 410 at the ends remain straight, and when the elastic element 400 is compressed, the distance between the two helical structures 420 in the left-right direction increases. Understandably, the elastic force of the elastic element 400 can be adjusted by adjusting the number of turns of the helical structures 420.
[0054] In some embodiments, such as Figures 3 to 6As shown, the first hinge base 200 includes a main frame 250 and two hinge portions 260 spaced apart along a first direction, with the main frame 250 forming a clearance space 252. The connecting portion 110 on the first hinge base 200 is defined as the first connecting portion 220, and the limiting portion 120 on the first hinge base 200 is defined as the first limiting portion 230. Both the first connecting portion 220 and the first limiting portion 230 are connected to one side of the main frame 250. The hinge portions 260 protrude from the main frame 250 towards the outside of the box body 2001. The second hinge base 300 is disposed between the two hinge portions 260 and is rotatably connected to the two hinge portions 260 via a pivot. When the second hinge base 300 is in the second position, a portion of its structure extends into the clearance space 252. This avoids interference between the second hinge base 300 and other components when the box cover 2002 is opened, improving the smoothness and stability of the flip structure 1000's movement.
[0055] The first hinge seat 200 forms a limiting groove 240 extending in the first direction between the first connecting part 220 and the first limiting part 230. When the flipping action is performed, the elastic member 400 is subjected to a downward force, causing the elastic member 400 to compress and deform. Part of the structure of the elastic member 400 can abut against the side wall of the limiting groove 240 and slide along the side wall of the limiting groove 240, so as to prevent the end structure of the elastic member 400 from bending and maintain the smoothness of the elastic member 400 moving in the left and right directions.
[0056] The main frame 250 has a limiting beam 251 located at the top of the clearance space 252. The top or rear side of the limiting beam 251 forms a first limiting surface. When the second hinge seat 300 is in the first position, the second hinge seat 300 abuts against the first limiting surface; that is, the limiting beam 251 can support the second hinge seat 300 when it is in the first position. The bottom surface of the limiting beam 251 forms a second limiting surface, that is, the top wall of the clearance space 252 forms a second limiting surface. When the second hinge seat 300 is in the second position, the second hinge seat 300 abuts against the second limiting surface. This abutting relationship limits the maximum opening angle of the lid 2002, preventing damage to the box body 2001 or the hinge structure due to excessive opening.
[0057] This embodiment achieves precise control over the opening angle of the lid 2002 through the limiting beam 251. By adjusting the positions of the first and second limiting surfaces during the design phase, the maximum opening angle of the lid 2002 can be flexibly set to meet different usage requirements. Furthermore, the limiting beam 251 is located at the top of the clearance space 252, eliminating the need for additional support and limiting structures, resulting in a more compact overall layout and reduced structural complexity and cost.
[0058] Furthermore, a mounting groove 270 is formed on the top of the main frame 250, which is used for the insertion of the protruding structure of the box body 2001. The connection position between the first connecting seat and the box body 2001 is determined by the cooperation between the protruding structure on the box body 2001 and the mounting groove 270. The first hinge seat 200 also includes two connecting ears 280 disposed on both sides of the main frame 250 along the first direction. The connecting ears 280 are used to connect with the box body 2001. For example, the first hinge seat 200 can be fixed to the box body 2001 by fasteners passing through the connecting ears 280 and connecting with the box body 2001.
[0059] In some embodiments, such as Figures 3 to 6 As shown, the second hinge seat 300 includes a rotating base 350 and a mounting portion 360 connected to each other. The rotating base 350 is disposed between the two hinge portions 260 and connected to the two hinge portions 260 via a pivot. That is, when the second hinge seat 300 is in the second position, the rotating base 350 can fill the gap between the two hinge portions 260 and play a shielding role. The mounting portion 360 is used to connect with the cover 2002. Specifically, the mounting portion 360 protrudes from the main frame 250, making it easy to directly insert into the corresponding structure of the cover 2002, thereby increasing the contact area between the second hinge portion 260 and the cover 2002 and improving the connection stability.
[0060] The connecting portion 110 of the second hinge seat 300 is defined as the second connecting portion 330, and the limiting portion 120 on the second hinge seat 300 is defined as the second limiting portion 340. The second connecting portion 330 and the second limiting portion 340 are provided at the bottom of the rotating base 350.
[0061] When the second hinge seat 300 is in the first position, the rotating base 350 can abut against one side of the main frame 250 along the second direction, that is, the front side of the rotating base 350 can cooperate with the first limiting surface to limit the position; or, the mounting part 360 protrudes from the front side of the rotating base 350, so that when the second hinge seat 300 is in the first position, the protruding structure of the mounting part 360 can abut against the top of the main frame 250, that is, the bottom surface of the mounting part 360 can cooperate with the first limiting surface to limit the position.
[0062] When the second hinge seat 300 is in the second position, the end of the rotating base 350 away from the mounting part 360 abuts against the top wall of the clearance space 252, limiting the maximum opening angle of the cover 2002 and preventing damage to the box body 2001 or the hinge structure due to excessive opening.
[0063] In this embodiment, the rotating base and the wall surface of the mounting part 360 are used to achieve the limiting cooperation with the limiting beam 251, without the need for other supporting structures and limiting structures, making the overall layout more compact and reducing the complexity and cost of the structure.
[0064] like Figure 3As shown, a channel can be provided on the second hinge seat 300 for the flexible conductive structure 2003 of the power supply connection box 2001 and the box cover 2002 to pass through. The flexible conductive structure 2003 can be an FPC.
[0065] In addition, this application also provides an earphone case, such as Figure 1 and Figure 2 As shown, the headphone case 2000 includes a case body 2001, a case lid 2002, and a flip structure 1000 as described above. The case body 2001 is connected to one of the hinge seats 100, and the case lid 2002 is connected to the other hinge seat 100. The case lid 2002 can rotate relative to the case body 2001 via the flip structure 1000 to open or close the case body 2001. Thanks to the improvements to the flip structure 1000 in the above embodiments, the headphone case 2000 of this embodiment has the same technical effects as the flip structure 1000 in the above embodiments, which will not be described again here.
[0066] Understandably, when the second hinge seat 300 is in the first position, the housing 2001 and the cover 2002 form a receiving cavity for holding the earphones. The housing 2001 also has an inner cavity containing electrical components for charging the earphones. The design of the receiving cavity and the charging scheme can use conventional structures in the art, and this embodiment will not describe them in detail.
[0067] The housing 2001 includes a first housing 2001 and a second housing 2001. The first housing 2001 is fixed to the connecting ear 280 by fasteners such as screws. The second housing 2001 is provided with a protruding structure, which is inserted into the mounting groove 270 for positioning, and then connected to the first housing 2001 by a snap-fit structure or screws. An inner cavity for accommodating electrical components is formed between the first housing 2001 and the second housing 2001.
[0068] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.
Claims
1. A flipping structure, characterized in that, include: Two hinge seats are rotatably connected to each other, one of the hinge seats is used to connect to the box body, and the other hinge seat is used to connect to the box cover; the hinge seat has a connecting part and a limiting part spaced apart along a first direction, the connecting part has a mounting hole extending along the first direction, the first direction being parallel to the rotation axis when the two hinge seats rotate relative to each other. An elastic element, the two ends of which are rotatably disposed in the mounting holes of the two hinge seats, and both ends of the elastic element are movable along a first direction; The limiting part is used to stop the elastic member when the end of the elastic member moves in the first direction, so as to limit the movement of the end of the elastic member in the first direction, so that the two ends of the elastic member are respectively kept in the mounting holes of the two hinge seats.
2. The flipping structure according to claim 1, characterized in that, At least one of the hinge seats has a limiting groove extending in a first direction, the limiting groove being located between the connecting portion and the limiting portion; The elastic element is configured such that a portion of the structure abuts against the wall of the limiting groove during compression deformation and slides along the wall of the limiting groove.
3. The flipping structure according to claim 1, characterized in that, The two hinge seats include a first hinge seat and a second hinge seat. The first hinge seat is used to connect with the housing body, and the second hinge seat is used to connect with the housing lid. The second hinge seat has a first position and a second position. When the second hinge seat is in the first position, the box cover closes the box body, and the elastic element is in a compressed state; And / or, When the second hinge seat is in the second position, the lid opens the box body, and the elastic element is in a compressed state.
4. The flipping structure according to claim 3, characterized in that, The first hinge seat includes a main frame and two hinge portions spaced apart along a first direction. The main frame encloses an avoidance space and is provided with the connecting portion and the limiting portion. The hinge portions protrude from the main frame toward the outside of the box body. The second hinge seat is disposed between the two hinge parts and is rotatably connected to the two hinge parts via a pivot; when the second hinge seat is in the second position, a portion of the structure of the second hinge seat extends into the clearance space.
5. The flipping structure according to claim 4, characterized in that, The main frame has a limiting beam located at the top of the clearance space; the limiting beam has a first limiting surface on the side opposite to the clearance space or along the second direction; when the second hinge seat is in the first position, the second hinge seat abuts against the first limiting surface; and / or, The limiting beam forms a second limiting surface on the side facing the clearance space. When the second hinge seat is in the second position, the second hinge seat abuts against the second limiting surface.
6. The flipping structure according to claim 4, characterized in that, The top of the main frame forms a mounting groove for inserting a protruding structure of the box body; and / or, The first hinge seat also includes two connecting ears disposed on both sides of the main frame along the first direction, the connecting ears being used to connect with the box body.
7. The flipping structure according to claim 4, characterized in that, The second hinged base includes a rotating base and a mounting part connected to each other; The rotating base is located between the two hinge parts and connected to the two hinge parts via a rotating shaft, and the mounting part is used to connect to the box cover.
8. The flipping structure according to claim 7, characterized in that, When the second hinge seat is in the first position, the rotating base abuts against one side of the main frame along the second direction, or the portion of the mounting part protruding from the rotating base along the second direction abuts against the top of the main frame; and / or, When the second hinge seat is in the second position, the end of the rotating base away from the mounting part abuts against the top wall of the clearance space.
9. The flipping structure according to claim 1, characterized in that, The elastic element includes multiple bent connecting rods, and the connection between two adjacent connecting rods forms one or more spiral structures. The two connecting rods at both ends are inserted into the two mounting holes in a one-to-one correspondence, and the spiral structure connected to the connecting rod at the end is limited between the connecting part and the limiting part.
10. An earphone case, characterized in that, The device includes a box body, a box lid, and a flip structure as described in any one of claims 1 to 9, wherein the box body is connected to one of the hinge seats, the box lid is connected to the other of the hinge seats, and the box lid is rotatable relative to the box body to open or close the box body.