CN113810810A

CN113810810A - A bistable hinge for earphone charging box and earphone charging box

Info

Publication number: CN113810810A
Application number: CN202010550823.7A
Authority: CN
Inventors: 蔡昭球
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-06-16
Filing date: 2020-06-16
Publication date: 2021-12-17
Anticipated expiration: 2040-06-16
Also published as: CN113810810B; CN120608626A

Abstract

The embodiment of the present application provides a bistable hinge for an earphone charging box and an earphone charging box. The bistable hinge includes a mounting seat, an adapter and an elastic part; the adapter is rotatably connected with the mounting seat, and the adapter has The rotation axis, the adapter has a first stable position, a critical position and a second stable position, and the critical position is located between the first stable position and the second stable position; the elastic member is loaded between the mounting seat and the adapter. When the adapter is at the critical position, the torque exerted by the elastic element on the adapter is zero; when the adapter deviates to either side of the critical position along the rotation direction, the elastic element applies a driving torque to the adapter to drive the adapter The piece moves to the first steady state position or the second steady state position. The bistable hinge of the embodiment of the present application has the functions of automatic closing and automatic opening within a certain rotation range, and both the closing process and the opening process have damping feel, which is beneficial to improve the user's experience.

Description

Bistable hinge for earphone charging box and earphone charging box

Technical Field

The application relates to the technical field of charging, especially, relate to a bistable hinge and earphone charging box for earphone charging box.

Background

The earphone charging box is a device capable of charging and storing earphones, and particularly, when the earphones are not needed to be used, the earphones are placed into the earphone charging box to be stored and charged, so that the earphones are convenient to carry about. Among the correlation technique, earphone charging box uses the mode of magnet adsorption, keeps box body and lid at the closure state, opens the back when the lid, because magnetic force effect, the lid has closed trend, can't keep opening state, and at this moment, the artificial lid that lives of user is needed, perhaps, sets up other bolt lock structure on earphone charging box.

Disclosure of Invention

In view of the above, embodiments of the present application are directed to providing a bistable hinge for a charging box of a headset and a charging box of a headset having an automatic opening function and an automatic closing function within a certain range.

In order to achieve the above object, embodiments of the present application provide a bistable hinge for an earphone charging box, the bistable hinge includes a mounting seat, an adaptor, and an elastic member; the adaptor is rotationally connected with the mounting base, the adaptor is provided with a rotation axis, the adaptor is provided with a first stable position, a critical position and a second stable position, and the critical position is located between the first stable position and the second stable position; the elastic piece is loaded between the mounting seat and the adapter piece, and when the adapter piece is located at a critical position, the torque applied to the adapter piece by the elastic piece is zero; when the adaptor deflects to any side of the critical position along the rotation direction, the elastic piece applies driving torque to the adaptor to drive the adaptor to move to the first stable position or the second stable position.

In some embodiments, the resilient member comprises at least one torsion spring comprising a first leg, a second leg, and a spiral, the first leg being connected to the mounting base and the second leg being connected to the adaptor; the included angle between the axis of the spiral body and the rotating axis ranges from 45 degrees to 90 degrees.

In some embodiments, the axis of the screw is perpendicular to the axis of rotation; the critical position is at 1/2 of the rotational travel between the first and second steady-state positions; at the critical position, the pitch of the helix is at a maximum.

In some embodiments, the number of the torsion springs is two, the ends of the first legs of the two torsion springs are fixedly connected, and the axes of the spiral bodies of the two torsion springs are parallel.

In some embodiments, two insertion holes are disposed on two opposite sides of the adaptor along the rotation axis direction, wherein an end of the second leg of one of the torsion springs is inserted into one of the insertion holes, and an end of the second leg of the other of the torsion springs is inserted into the other of the insertion holes.

In some embodiments, the two insertion holes are coaxial and have an axis parallel to the rotation axis.

In some embodiments, the bistable hinge includes a rotating shaft, the adaptor is provided with a first shaft hole, the mounting seat includes a bottom plate and two upright posts located at two opposite ends of the bottom plate, the upright posts are provided with second shaft holes, and the rotating shaft penetrates through the first shaft hole and the second shaft holes.

In some embodiments, the top surface of the base plate is formed with a recessed area, the mounting seat includes a blocking piece located on the top side of the recessed area, the blocking piece and the surface of the recessed area jointly define a limiting groove, and the first leg of the torsion spring is movably disposed in the limiting groove.

In some embodiments, the mounting seat comprises a first limiting plate arranged at the top ends of the two upright posts and a second limiting plate connected between the two upright posts; along the height direction of the upright column, the second limiting plate is positioned between the first limiting plate and the bottom plate, and the rotating shaft is positioned between the first limiting plate and the second limiting plate; in a plane projection perpendicular to the height direction of the upright column, a rotating space is defined by the first limiting plate and the second limiting plate, a part of the adapter is located in the rotating space, and a first stable position and a second stable position of the adapter are defined by the first limiting plate and the second limiting plate together.

In some embodiments, the adaptor includes first daughter board and second daughter board, first axle hole runs through first daughter board, the second daughter board is located one side of first daughter board, the spliced eye set up in on the second daughter board, the second daughter board is followed the size of axis of rotation direction is less than the size of first daughter board.

In some embodiments, an avoidance notch is formed at an edge of the first limiting plate, and an avoidance groove is formed at a position where the second limiting plate is in contact with the second daughter board; when the adaptor is located a first stable state position, partial structure of the second daughter board is located in the avoidance groove and in contact with the stop of the second limiting plate, and at least partial structure of the first daughter board is clamped in the avoidance notch.

In some embodiments, the adapter further includes a shielding plate, the first sub-plate is disposed on a surface of the shielding plate, the rotating shaft is located on a side of the shielding plate facing the first sub-plate, and when the adapter is in the first stable position, the shielding plate covers a space defined by the two upright posts, the first limiting plate, and the second limiting plate.

In some embodiments, the mount is an integrally formed structure; and/or the adapter piece is of an integrally formed structure.

In some embodiments, the corresponding angle of rotation between the first and second stable positions is from 80 ° to 100 °.

The embodiment of the application also provides an earphone charging box, which comprises a box cover, a box body and any one bistable hinge, wherein the box cover is fixedly connected with the adaptor; the box body is used for accommodating and charging the earphones; the mounting seat is fixedly arranged in the box body; the adapter drives the box cover to be switched between an open state and a closed state of the box body, when the adapter is in a first stable state position, the box cover is in the closed state, and when the adapter is in a second stable state position, the box cover is in the open state.

The bistable hinge of the embodiment of the application takes the adaptor to be switched from the first stable position to the second stable position as an example, a user can rotate the adaptor slowly, at the moment, the force applied by the user needs to overcome the resistance generated by the first torque W1, as long as the adaptor can cross the critical position by the rotation angle of the adaptor, after the critical position is crossed, the elastic member applies an opposite second torque W2 to the adaptor, the direction of the second torque is the same as the rotation direction, the second torque is a driving torque, at the moment, even if the user can loosen his hand, the adaptor can automatically rotate under the action of the elastic member until the second stable position is reached, and the adaptor is stably kept at the second stable position under the action of the second torque W2. The bistable hinge of this application embodiment has the function of automatic closure and automatic opening in certain rotation range, and the closed process all has the damping to feel with opening the process, is favorable to promoting user's experience and feels.

Drawings

FIG. 1 is a schematic structural diagram of a bistable hinge according to an embodiment of the present application;

FIG. 2 is an exploded view of the structure shown in FIG. 1;

FIG. 3 is a schematic structural diagram of an elastic member according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a mounting base according to an embodiment of the present application;

FIG. 5 is a schematic view of the structure of FIG. 4 from another perspective;

FIG. 6 is a schematic view of the structure of FIG. 5 from another perspective;

FIG. 7 is a schematic view of the structure of FIG. 6 from another perspective;

FIG. 8 is a mechanical schematic diagram of a bistable hinge according to an embodiment of the present application, wherein the adaptor member is in a first stable position;

FIG. 9 is a mechanical schematic representation of the structure of FIG. 8 in another state wherein the adapter is in a second stable position;

fig. 10 is a schematic structural diagram of an earphone charging box according to an embodiment of the present application, wherein the box cover is in a closed state;

fig. 11 is a schematic structural view of the earphone charging box of fig. 10 in another state, in which the box cover is in an open state;

FIG. 12 is an exploded view of the structure shown in FIG. 11;

FIG. 13 is a schematic view of the structure shown in FIG. 11 with the storage cover omitted;

FIG. 14 is a schematic structural diagram of a cassette according to an embodiment of the present application;

FIG. 15 is a cross-sectional view of the structure shown in FIG. 10;

fig. 16 is a schematic view of the structure of fig. 15 in another state, wherein the lid is in an open state.

Description of the reference numerals

A box body 1; a plug groove 10 a; a storage cover plate 12; a receiving groove 12 a; the first ribs 131; the second ribs 132; a box cover 2; a bistable hinge 3; an adaptor 31; a plug hole 31 a; the first shaft hole 31 b; a first sub-board 312; a second sub-board 313; a shield plate 314; an arc-shaped groove 314 a; a mounting seat 32; a bottom plate 320; a recessed region 320 a; a column 321; the second shaft hole 321 a; a first limit plate 322; an avoidance notch 322a, a second limit plate 323; an avoidance slot 323 a; the rotation space 32 a; a stopper piece 324; a stopper groove 324 a; an elastic member 33; a torsion spring 33'; a screw 331; the first leg 332; a second leg 333; rotating shaft 34

Detailed Description

It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.

In the description of the embodiments of the present application, "top", "bottom", orientation or positional relationship is based on the orientation or positional relationship shown in fig. 15, specifically, "top" is above and "bottom" is below in fig. 15. It is to be understood that such directional terms are merely for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present application.

The embodiment of the application provides a bistable hinge for an earphone charging box and the earphone charging box.

The earphone charging box is used for charging the matched earphone, specifically, the inside of the earphone charging box is provided with a power supply for storing electric energy, and when the earphone is placed in the earphone charging box, the power supply for storing electric energy can charge the earphone. The earphone in the embodiment of the application can be matched with an intelligent terminal such as a mobile phone and a tablet, the connection and the like, and when the intelligent terminal is used by a user, the audio can be automatically switched into the earphone. The headset may be a bluetooth headset, an infrared headset, etc., without limitation.

Referring to fig. 10 to 12, the earphone charging box includes a box cover 2, a box body 1, and a bistable hinge 3 according to an embodiment of the present invention. The box cover 2 and the box body 1 are rotationally connected through a bistable hinge 3.

The bistable state in the embodiment of the present application means that at least two stable states are included during the rotation, and in the stable state, even after the external force is removed, the current stable state can be reliably maintained.

Referring to fig. 1 and 2, the bistable hinge 3 includes a mounting seat 32, an adaptor 31 and an elastic member 33. The adaptor 31 has an axis of rotation (abbreviated to point O in fig. 8 and 9), the adaptor 31 has a first stable position (see fig. 1 and 15), a critical position between which the critical position is located, and a second stable position (see fig. 16) between which the adaptor 31 is switched. The elastic member 33 is loaded between the mounting seat 32 and the adaptor 31, that is, for the elastic member 33, the mounting seat 32 and the adaptor 31 are both loaded by the elastic member 33.

When the adaptor 31 is in the critical position, the torque applied by the elastic member 33 to the adaptor 31 is zero; when the adaptor 31 is biased to either side of the critical position in the rotation direction, the elastic member 33 applies a driving torque to the adaptor 31 to drive the adaptor 31 to move to the first stable position or the second stable position.

It should be noted that the phrase "when the adaptor 31 is biased to either side of the critical position in the rotation direction, the elastic member 33 applies a driving torque to the adaptor 31 to drive the adaptor 31 to move to the first stable position or the second stable position" includes two conditions, namely, the first condition: when the adaptor 31 deviates from the critical position and is located at a first side of the critical position in the rotation direction, the elastic member 33 drives the adaptor 31 to move to the first stable position. And the second method comprises the following steps: when the adaptor 31 deviates from the critical position and is located at a second side of the critical position along the rotation direction, the elastic member 33 drives the adaptor 31 to move to the second stable position.

Specifically, referring to fig. 8, the elastic element 33 applies a force F1 to the adaptor 31, the force F1 generates a first torque W1 about the rotation axis (simplified to point O in fig. 8), the first torque W1 is the above-mentioned driving torque, and the adaptor 31 moves to and is maintained at the first stable position under the action of the first torque W1, that is, the adaptor 31 does not deviate from the current first stable position in the absence of an external force or in the case that the external force does not act on the adaptor 31 enough to overcome the resistance force generated by the first torque W1.

Referring to fig. 9, the elastic member 33 applies a force F2 to the connecting member 31, the force F2 generates a second torque W2 around the rotation axis (simplified to point O in fig. 9), and the second torque W2 is the above-mentioned driving torque, wherein the first torque W1 and the second torque W2 are opposite in direction. The adapter 31 moves to the second stable position under the action of the second torque W2 and remains in the current second stable position, that is, the adapter 31 does not deviate from the current second stable position without the action of external force or the action of external force on the adapter 31 is insufficient to overcome the resistance force formed by the second torque W2.

When the adaptor 31 needs to be switched from the first stable position to the second stable position, the user can rotate the adaptor 31 slowly, the force applied by the user needs to overcome the resistance generated by the first torque W1, that is, the first torque W1 is a resistance torque, after the adaptor 31 rotates by an angle that enables the adaptor 31 to cross the above-mentioned critical position, the elastic member 33 applies a second torque W2 in the opposite direction to the adaptor 31, the direction of the second torque W2 is the same as the rotating direction, and the second torque W2 is a driving torque, so that even if the user looses his hand, the adaptor 31 can rotate automatically by the elastic member 33 until the second stable position is reached, and can be stably maintained at the second stable position by the second torque W2.

When the adaptor 31 needs to be switched from the second stable position to the first stable position, the user can slowly rotate the adaptor 31 in the opposite direction, the force applied by the user needs to overcome the resistance generated by the second torque W2, that is, the second torque W2 is a resisting torque, after the adaptor 31 is rotated by an angle that enables the adaptor 31 to cross the above-mentioned critical position, the elastic member 33 applies the opposite first torque W1 to the adaptor 31, even if the user looses his hand, the adaptor 31 can automatically continue to rotate to the first stable position under the action of the elastic member 33, and is stably kept at the first stable position under the action of the first torque W1.

That is to say, the bistable hinge of this application embodiment has automatic closed and automatic function of opening in certain rotation range, and the closed process all has the damping to feel with opening the process, is favorable to promoting user's experience and feels.

Illustratively, the mounting seat 32 is fixedly arranged in the box body 1, specifically, the inner side of the box body 1 is provided with a plug-in slot 10a, and part of the structure of the mounting seat 32 can be inserted into the plug-in slot 10a from the opening of the box body 1 and fixed in the plug-in slot 10 a; the adaptor 31 is fixedly connected with the box cover 2, and the adaptor 31 drives the box cover 2 to switch between an open state and a closed state for covering the box body 1. Referring to fig. 15, when the adaptor 31 is in the first stable position, the box cover 2 is in the closed state. Referring to fig. 16, when the adaptor 31 is in the second stable position, the box cover 2 is in the open state.

The specific type of the elastic member 33 is not limited. For example, in one embodiment, referring to fig. 2, the elastic member 33 includes at least one torsion spring 33'. Specifically, referring to fig. 3, the torsion spring 33' includes a screw 331, a first leg 332 and a second leg 333, and the first leg 332 and the second leg 333 are connected to two opposite ends of the screw 331 in the axial direction. The first leg 332 of the torsion spring 33 'is connected to the mounting seat 32, and the second leg 333 of the torsion spring 33' is connected to the adaptor 31 to drive the adaptor 31 to rotate around the rotation axis in the forward and reverse directions. That is, the second leg 333 of the torsion spring 33' can drive both the forward rotation of the adaptor 31 about the rotation axis and the reverse rotation of the adaptor 31 about the rotation axis. The screw 331 is suspended, that is, the screw 331 is displaced along with the second leg 333.

The forward and reverse directions refer to two directions around the rotation axis. For example, the clockwise direction in fig. 8 may be named as a positive direction, and the counterclockwise direction in fig. 8 may be named as a negative direction. The clockwise direction in fig. 8 may be named as a reverse direction, and the counterclockwise direction in fig. 8 may be named as a forward direction.

It is understood that the torsion spring 33' may form the first torque W1 in a compressed state or the first torque W1 in a stretched state. Similarly, the torsion spring 33' may form the second torque W2 in a compressed state or may form the second torque W2 in a stretched state. And are not intended to be limiting herein.

The arrangement of the spiral body 331 of the torsion spring 33' is not limited, for example, in an embodiment, the axial direction of the spiral body 331 may be parallel to the rotation axis.

In one embodiment, referring to fig. 2, the included angle between the axis of the screw 331 and the rotation axis is 45 ° to 90 °. In this way, the space occupied by the torsion spring 33' in the direction perpendicular to the rotation axis can be reduced, so that the bistable hinge is compact in structure.

When the adaptor 31 rotates, the distance between the end of the first leg 331 and the end of the second leg 333 changes, which results in a change in the pitch of the screw 331, that is, the screw 331 is elastically deformed in the axial direction, and therefore, the screw 331 has a resilient force in the axial direction. This spring-back force acts on the adapter 31, resulting in the forces F1 and F2 described above. Since the acting forces F1 and F2 are relatively determined in the direction substantially along the axial direction of the spiral body 332, the diameter, material, pitch, etc. of the spiral body 332 can be easily designed in the process of designing the torsion spring.

In one embodiment, the axis of the screw 331 is perpendicular to the rotation axis. That is, the angle between the axis of the screw 331 and the rotation axis is 90 °.

It can be understood that, in the embodiment in which the axis of the spiral body is parallel to the rotation axis, since the acting force of the first support leg is formed by the resilience of the first support leg, the posture of the first support leg is different along with the deformation degree of the torsion spring, which may result in the direction of the acting force of the first support leg being uncertain, and the design process of the torsion spring being abnormally complex.

In the embodiment in which the axis of the spiral body 332 is perpendicular to the rotation axis, since the torsion spring 33 'relies on the acting force generated by the elastic deformation of the spiral body 332 in the axial direction, even if the maximum distance between the end of the first leg 331 and the end of the second leg 333 is designed to be relatively small, the torsion spring 33' can apply a large elastic force to the connecting member 31, and therefore, the occupied sizes of the torsion spring in the height direction (up-down direction) and the width direction (left-right direction) of fig. 15 are relatively small, so that the bistable hinge can be made compact.

Set up in the earphone under the condition of the box body 1 of the box that charges at mount pad 32, because box body 1 had both held the earphone, still can set up power, circuit board, the contact that charges etc. and the part in the box body 1 is more for the space that is used for holding mount pad 32 in the box body 1 is narrower, and the bistable hinge structure of this application embodiment can be applicable to the narrow and small space in the box body 1 of the box that charges at the earphone.

Take for example the switchover of the adapter 31 from the first stable position to the second stable position. During the transition of the adaptor 31 from the first stable position to the second stable position, the distance between the end of the first leg 331 and the end of the second leg 333 gradually decreases and then gradually increases, and the pitch of the screw 332 gradually increases and then gradually decreases.

In one embodiment, the critical position is 1/2 of the rotational travel between the first stable position and the second stable position where the pitch of the screw is at a maximum and the distance between the end of the first leg 332 and the end of the second leg 333 is at a minimum. At the critical position, the elastic potential energy of the torsion spring 33 'is greater than that at other positions, and the torsion spring 33' can drive the adaptor 31 to continue rotating with the greater elastic potential energy as long as the user passes the adaptor 31 over the critical position no matter whether the adaptor 31 rotates forwards or backwards.

It is understood that the number of the torsion springs 33' may be one or more, wherein more means not less than two. In the embodiment with a plurality of torsion springs 33 ', the torsion springs 33' may be spaced apart from each other, do not interfere with each other, or may be connected to each other.

It should be noted that in the embodiment with only one torsion spring 33', the first leg 332 and the second leg 333 both generate a force component in the direction of the rotation axis, and the force components of both have the same direction. The component force will force the adapter 31 to move along the direction of the rotation axis, which will cause a shaking and unstable hand feeling for the user. Therefore, in the embodiment of the present application, please refer to fig. 3, the number of the torsion springs 33 'is two, the ends of the first legs of the two torsion springs 33' are fixedly connected, and the axes of the two torsion springs are parallel. That is, the two torsion springs 33' form a double torsion spring. On the one hand, the structural strength of two torsional springs is high, and torsion is big, and stability is good, and non-deformable when atress is great, and long service life can promote bistable hinge's reliability and durability.

On the other hand, the two torsion springs 33' have opposite force components in the direction of the rotation axis and can cancel each other out, so that the adapter 31 can be centered at an intermediate position along the rotation axis. Specifically, due to manufacturing errors, assembly errors, and the like, a certain axial clearance may exist between the adaptor 31 and the mounting seat 32 in the direction of the rotation axis, which clearance is not only required to ensure that the adaptor 31 and the mounting seat 32 can be assembled normally, but also required to cause a large dry friction between the adaptor 31 and the mounting seat 32. Due to the axial play, the adapter piece 31 has the possibility of axial play. Under the action of the two torsion springs 33 ', when the adapter 31 is located at the middle position, the acting forces of the two torsion springs 33' along the axial direction are balanced, when the adapter 31 moves a little along the left side of fig. 3, the torsion spring 33 'on the right side forces the adapter 31 to move to the right, and when the adapter 31 moves a little along the right side of fig. 3, the torsion spring 33' on the left side forces the adapter 31 to move to the left, so that the adapter 31 is stabilized at the middle balanced position. Therefore, even if the adaptor 31 has larger axial gaps along both sides of the axial direction, the adaptor 31 does not move along the axial direction, the requirements on the manufacturing precision and the assembling precision of the adaptor 31 and the mounting seat 32 can be reduced, and the reduction of the production cost is facilitated.

Specifically, referring again to fig. 3, in an embodiment of the present application, the first leg 332 and the second leg 333 are both of a bent structure, and the two torsion springs 33' substantially form a regular hexagon.

In one embodiment, the corresponding rotational angle between the second stable position and the first stable position is between 80 ° and 100 °. E.g., 80 °, 90 °, 100 °, etc.

In an embodiment, referring to fig. 2, two insertion holes 31a are disposed on two opposite sides of the adaptor 31 along the rotation axis direction, wherein an end of the second leg 333 of one torsion spring 33 'is inserted into one of the insertion holes 31a, and an end of the second leg 333 of the other torsion spring 33' is inserted into the other insertion hole 31 a. During the rotation of the adaptor 31 around the rotation axis, the end of the second leg 333 of the torsion spring 33 'can rotate in the insertion hole 31a to improve the stress condition of the torsion spring 33' itself.

In one embodiment, the two insertion holes 31a are coaxial and parallel to the rotation axis. That is, the two insertion holes 31a are located on the same straight line.

The rotational connection structure between the adaptor 31 and the mounting seat 32 is not limited, for example, in some embodiments, referring to fig. 2, the bistable hinge includes a rotating shaft 34, and the adaptor 31 and the mounting seat 32 are rotationally connected through the rotating shaft 34. Referring to fig. 4 and 5, the mounting base 32 includes a bottom plate 320 and two upright posts 321 disposed at two opposite ends of the bottom plate 320. Referring to fig. 1, a part of the structure of the adaptor 31 is located between two columns 321, a second shaft hole 321a is formed on each column 321, a first shaft hole is formed on the adaptor 31, and the rotating shaft 34 is inserted into the first shaft hole and the second shaft hole 321 a.

Referring to fig. 4, in an embodiment, the mounting base 32 includes a first limiting plate 322 disposed at the top ends of the two upright posts 321 and a second limiting plate 323 connected between the two upright posts 321. Referring to fig. 5, along the height direction of the upright 321, the second limiting plate 323 is located between the first limiting plate 322 and the bottom plate 320, and the rotating shaft 34 is located between the first limiting plate 322 and the second limiting plate 323. Referring to fig. 7, in a plane projection perpendicular to the height direction of the upright 321, the first limiting plate 322 and the second limiting plate 323 jointly define a rotating space 32a, a part of the structure of the adaptor 31 is located in the rotating space 32a, and the first limiting plate 322 and the second limiting plate 323 jointly define a first stable position and a second stable position of the adaptor 31.

For example, in an embodiment, referring to fig. 2, the adaptor 31 includes a first sub-board 312 and a second sub-board 313, the second sub-board 313 is located on one side of the first sub-board 312 along a direction perpendicular to the rotation axis, the first shaft hole 31b penetrates through the first sub-board 312, the insertion hole 31a is disposed on the second sub-board 313, and a dimension of the second sub-board 313 along the rotation axis direction is smaller than a dimension of the first sub-board 312. In this manner, the distance between the ends of the second legs 333 of the two torsion springs 33 'can be made small, facilitating the installation of the torsion springs 33'.

In one embodiment, referring to fig. 5 and 6, a recessed region 320a is formed on the top surface of the bottom plate 320. The mounting base 320 includes a stop piece 324 at the top side of the recessed area 320a, and the stop piece 324 and the surface of the recessed area 320a together define a limiting groove 324 a. referring to fig. 15 and 16, the first leg 332 of the torsion spring 33' is movably disposed in the limiting groove 324 a. That is, in this embodiment, during assembly, the first leg 332 of the torsion spring 33' only needs to be snapped into the retaining groove 324a, and the flap 324 can prevent the first leg 332 from being separated from the bottom plate 320 from the top side of the recessed area 320 a.

In an embodiment, referring to fig. 5, an avoiding notch 322a is formed at an edge of the first limiting plate 322, when the adaptor 31 is in the first stable position, at least a part of the structure of the first sub-plate 312 is clamped in the avoiding notch 322a, and the second sub-plate 313 is in stop contact with the second limiting plate 323, that is, the adaptor 31 is in stop contact with the second limiting plate 323 through the second sub-plate 313. This dodge breach 322a provides the space of dodging for first daughter board 312, avoids first daughter board 312 to interfere with first limiting plate 322 at the rotation in-process for adaptor 31 can have great rotation amplitude.

In an embodiment, referring to fig. 4 and fig. 7, an avoiding groove 323a is disposed at a position where the second limiting plate 323 contacts with the second sub-plate 313, and when the adaptor 31 is located at the first stable position, a part of the structure of the second sub-plate 313 is located in the avoiding groove 323a and contacts with the second limiting plate 323 in a stopping manner. The avoidance groove 323a enables the first limiting plate 312 and the second limiting plate 313 to have a smaller distance in a direction perpendicular to the height direction of the column 311, so that the bistable hinge is compact in structure, and meanwhile, the adaptor 31 can have a larger rotation amplitude.

In an embodiment, referring to fig. 2, the adaptor 31 further includes a shielding plate 314, the second sub-plate 312 is disposed on a surface of the shielding plate 314, and when the adaptor 31 is in the first stable position, the shielding plate 314 covers a space defined by the two posts 311, the first limiting plate 312, and the second limiting plate 313. The shielding plate 314 may shield the rotating shaft 34 such that the user cannot always see the rotating shaft 34 from a side of the shielding plate 314 facing away from the rotating shaft 34. In addition, when the adaptor 31 is in the first stable position, the shielding plate 314 can also cover the mounting seat 32, the torsion spring 33', and the like, so that a user cannot see a part of the mounting structure from a side of the shielding plate 314 away from the rotating shaft 34, and the aesthetic appearance of the bistable hinge structure is improved.

In one embodiment, referring to fig. 2, the shielding plate 314 has an arc-shaped groove 314a formed on a surface thereof, the arc-shaped groove 314a extends along an axial direction of the rotating shaft 34, and the rotating shaft 34 is partially disposed in the arc-shaped groove 314 a. The arc-shaped groove 314a can reduce the distance between the surface of the shielding plate 314 on the side away from the rotating shaft 34 and the rotating axis of the rotating shaft 34, so that the bistable hinge structure is more compact; in addition, during the rotation of the adaptor 31, the arc-shaped groove 314a can also play a role in guiding the rotation by matching with the rotating shaft 34, so that the rotation of the adaptor 31 is more stable.

It is understood that the mounting seat 32 may be an integral structure or a split structure, and is not limited herein.

The adaptor 31 may be an integrally formed structure or a split structure, and is not limited herein.

In order to facilitate the fixing of the mounting seat 32 into the insertion groove 10a, in an embodiment, referring to fig. 14, the earphone charging box includes a receiving cover 12, the receiving cover 12 is formed with a receiving groove 12a for receiving an earphone, and the receiving cover 12 presses against one side of the mounting seat 32 facing the box cover 2 to fix the mounting seat 32 into the insertion groove 10 a.

During the assembly process, the mounting seat 32 can be inserted into the insertion groove 10a in the box body 1 from the top side of the box body 1, and the insertion groove 10a positions the mounting seat 32 along the left, right and lower directions in fig. 15. Then, the storage cover 12 is placed into the box 1, and the storage cover 12 is pressed against the mounting seat 32 to fix the mounting seat 32 in the insertion slot 10a, that is, the storage cover 12 positions the mounting seat 32 along the upper side in fig. 15, so as to prevent the mounting seat 32 from coming off from the top side of the insertion slot 10 a. Therefore, under the condition that fastening modes such as screws and bonding are not used, the mounting seat 32 can be fixedly mounted, extra fasteners are not needed, the fixing mode is reliable, and the assembling time is saved.

In one embodiment, referring to fig. 14, the earphone storage box includes a first rib 131 protruding from the inner surface of the box body 1 and two second ribs 132, the first rib 131 extends along a direction parallel to the rotation axis, and the first rib 131 supports the mounting base 32. Two second protruding muscle 132 extend towards lid 2 direction from the relative both ends of first protruding muscle 131, and the one end that second protruding muscle 132 deviates from box body 1 is towards another second protruding muscle 132 lateral buckling, and the inner surface of the bending structure of two second protruding muscle 132 and box body 1 encloses jointly and establishes into inserting groove 10 a.

The various embodiments/implementations provided herein may be combined with each other without contradiction.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A bistable hinge for earphone charging box, characterized in that, comprising:

mount,

an adapter, the adapter is rotatably connected with the mounting seat, the adapter has a rotation axis, the adapter has a first steady state position, a critical position and a second steady state position, the critical a position between the first steady state position and the second steady state position;

An elastic piece, the elastic piece is loaded between the mounting seat and the adapter piece, when the adapter piece is at a critical position, the torque exerted by the elastic piece on the adapter piece is zero; The adapter is biased to either side of the critical position along the rotation direction, and the elastic member applies a driving torque to the adapter to drive the adapter to move to the first steady state position or the first steady state position. Two steady state positions.

2. The bistable hinge according to claim 1, wherein the elastic member comprises at least one torsion spring, the torsion spring comprises a first leg, a second leg and a helical body, the first leg The legs are connected with the mounting seat, and the second leg is connected with the adapter; the included angle between the axis of the spiral body and the rotation axis ranges from 45° to 90°.

3 . The bistable hinge according to claim 2 , wherein the axis of the spiral body is perpendicular to the rotation axis; the critical position is located at the first steady state position and the second steady state position. 4 . 1/2 of the rotational stroke between; at the critical position, the pitch of the helix is the largest.

4 . The bistable hinge according to claim 2 , wherein the number of the torsion springs is two, the ends of the first legs of the two torsion springs are fixedly connected, and the two torsion springs are fixedly connected. 5 . The axes of the coils of the spring are parallel.

5 . The bistable hinge according to claim 4 , wherein two insertion holes are provided on opposite sides of the adapter along the direction of the rotation axis, wherein one of the second torsion springs has two insertion holes. 6 . The end of the leg is inserted into one of the insertion holes, and the end of the second leg of the other torsion spring is inserted into the other of the insertion holes.

6 . The bistable hinge of claim 5 , wherein the two insertion holes are coaxial and the axes are parallel to the rotation axis. 7 .

7 . The bistable hinge according to claim 2 , wherein the bistable hinge comprises a rotating shaft, the adapter is provided with a first shaft hole, the mounting seat comprises a bottom plate and is located on the Two uprights at opposite ends of the bottom plate, the uprights are provided with a second shaft hole, and the rotating shaft passes through the first shaft hole and the second shaft hole.

8 . The bistable hinge according to claim 7 , wherein a concave area is formed on the top surface of the bottom plate, and the mounting seat comprises a baffle located on the top side of the concave area, and the baffle is connected to the bistable hinge. 9 . The surfaces of the recessed areas together define a limiting groove, and the first leg of the torsion spring is movably arranged in the limiting groove.

9 . The bistable hinge according to claim 7 , wherein the mounting seat comprises a first limit plate disposed at the top of the two uprights and a second limiter connected between the two uprights. 10 . plate; along the height direction of the column, the second limit plate is located between the first limit plate and the bottom plate, and the rotating shaft is located between the first limit plate and the second limit plate between the plates; in the plane projection perpendicular to the height direction of the column, the first limit plate and the second limit plate define a rotation space, and a part of the structure of the adapter is located in the rotation space Inside, the first limiting plate and the second limiting plate together define a first steady state position and a second steady state position of the adapter.

10 . The bistable hinge according to claim 9 , wherein the adapter comprises a first sub-board and a second sub-board, the first shaft hole penetrates through the first sub-board, and the The second sub-board is located on one side of the first sub-board, the insertion hole is provided on the second sub-board, and the size of the second sub-board along the direction of the rotation axis is smaller than that of the first sub-board board size.

11 . The bistable hinge according to claim 10 , wherein an escape notch is formed at the edge of the first limiting plate, and the second limiting plate is used for contacting the second sub-board. 12 . An escape groove is provided at the position of the second sub-board; when the adapter is in the first steady state position, part of the structure of the second sub-board is located in the escape groove and is in stop contact with the second limit plate, so At least part of the structure of the first sub-board is snapped into the avoidance notch.

12 . The bistable hinge according to claim 10 , wherein the adapter further comprises a shielding plate, the first sub-board is disposed on the surface of the shielding plate, and the rotating shaft is located on the shielding plate. 13 . On the side facing the first sub-board, when the adapter is in the first steady state position, the shielding plate covers the two uprights, the first limiting plate and the second limiting plate together. limited space.

13. The bistable hinge according to any one of claims 1-12, wherein the mounting seat is an integrally formed structure; and/or the adapter is an integrally formed structure.

14 . The bistable hinge according to claim 1 , wherein the corresponding rotation angle between the first stable position and the second stable position is 80°˜100° .

15. An earphone charging box, characterized in that, comprising:

a box cover, the box cover is fixedly connected with the adapter;

a box body, which is used for accommodating the earphone and charging the earphone;

In the bistable hinge according to any one of claims 1-14, the mounting seat is fixedly arranged in the box body; the adapter drives the box cover in an open state and covers the box body. When switching between closed states, when the adapter is in the first steady state position, the box cover is in the closed state, and when the adapter is in the second steady state position, the box cover is in the open state.