Hinge structure and packaging box with it

The application provides a hinge structure comprising a first connecting piece provided with a slot and a second connecting piece provided with a rotating shaft. An inner wall of the slot is provided with a limiting slot and an outer surface of the rotating shaft is convex to form a clipping strip; the clipping strip is inserted into the limiting slot to limit a relative rotation angle between the first connecting piece and the second connecting piece. The present application also provides a packaging box comprising the above hinge structure. The hinge structure and the packing box are provided with a limiting slot in the slot and a clipping strip on the rotating shaft. Through the cooperation between the clipping strip and the limiting slot, the relative rotation angle between the first connecting piece and the second connecting piece is fixed and the reliability of the hinge structure is improved.

CROSS REFERENCE TO RELATED APPLICATIONS

The present claims the benefit of Chinese Patent Application No. 202120431079.9 filed on Feb. 25, 2021, the contents of which are incorporated herein by reference in their entirety.

TECHNICAL FIELD

The present application relates to the technical field of hinges, and more specially relates to a hinge structure and a packaging box with it.

BACKGROUND

Hinge is a mechanical device used to connect two objects and allow relative rotation between them. It can be applied to doors and windows or covered devices, such as installed on the packaging box to realize the opening and closing of the packaging box cover. However, the structure of the traditional hinge device is mostly complex, including multiple parts, which increases the production cost of the hinge. In addition, the traditional hinge lacks a positioning mechanism, and the rotation angle between the two objects connected by the hinge is difficult to be fixed. It is easy to have problems such as object damage caused by the collision between the object and the external object or the failure of the hinge due to excessive force of the object, which shortens the service life of the hinge and brings inconvenience to the use of the two objects connected by the hinge.

SUMMARY

Based on this, it is necessary to provide a hinge structure and a packaging box with a simple structure and a limited rotation angle in view of the technical problem that the structure is complicated and the relative rotation angle of two objects connected by a hinge is not easily fixed.

The present application provides a hinge structure and the hinge structure comprises a first connecting piece provided with a slot and a second connecting piece provided with a rotating shaft that matches the slot, the second connecting piece rotates relative to the first connecting piece when the rotating shaft is inserted into the slot and subjected to external force;

an inner wall of the slot is provided with a limiting slot and an outer surface of the rotating shaft is convex to form a clipping strip; the clipping strip is inserted into the limiting slot to limit a relative rotation angle between the first connecting piece and the second connecting piece when the rotating shaft is inserted into the slot and rotates relative to the first connecting piece.

In one embodiment, an outer surface contour of the clipping strip matches with an inner surface contour of the limiting slot.

In one embodiment, the limiting slot extends along a depth direction of the slot, and the clipping strip extends along a length direction of the rotating shaft.

In one embodiment, the outer surface of the rotating shaft is provided with two clipping strips in parallel, the inner wall of the slot is provided with at least one set of limiting slots, and each set of the limiting slots comprises two limiting slots which are matched with the two clipping strips one by one.

In one embodiment, the first connecting piece comprises a first connecting column provided with the slot and a first connecting part integrally formed with an outer surface of the first connecting column;

the second connecting piece comprises a second connecting column and a second connecting part integrally formed with an outer surface of the second connecting column, the rotating shaft is arranged in the middle of the second connecting column along an axial direction of the second connecting column.

In one embodiment, an end face of the first connecting column protrudes at an edge of the slot to form a first sector-annular convex portion, an end face of the second connecting column is recessed to form a second sector-annular recessed portion half surrounding the rotating shaft; when the rotating shaft is inserted into the slot the first sector-annular convex portion is inserted into the second sector-annular recessed portion, and can rotate in the second sector-annular recessed portion to limit a rotation angle range between the first connecting piece and the second connecting piece.

In one embodiment, the first connecting part is provided with a first recessed portion that is rotatably matched with the outer surface of the second connecting column, and the second connecting part is provided with a second recessed portion that is rotatably matched with the outer surface of the first connecting column.

In one embodiment, a circumferential angle corresponding to the first sector-annular convex portion is between 90° and 120°, and a circumferential angle corresponding to the second sector-annular recessed portion is between 180° and 270°.

The present application also provides a packaging box, and the packaging box comprises the above hinge structure, the packaging box further comprises a face cover and a bottom cover, and the face cover is connected with the bottom cover through the hinge structure.

In one embodiment, the face cover is provided with a face cover slot, the bottom cover is provided with a bottom cover slot; the first connecting part is inserted into the face cover slot and is fixedly connected with the face cover, and the second connecting part is inserted into the bottom cover slot and is fixedly connected with the bottom cover.

In the hinge structure and the packaging box provided by the present application, by the limiting slot arranged in the slot and the clipping strip arranged on the rotating shaft which is matched with the limiting slot, when the rotating shaft of the second connecting piece is inserted into the slot and the second connecting piece or/and the first connecting piece are subjected to an external deflection force, causing the first connecting piece to rotate relative to the second connecting piece, clipping strip slides along the inner wall of the slot until it is embedded in the limiting slot. In this way, the clipping strip is not easy to fall off from the limiting slot under the restriction of the limiting slot, so as to fix the relative rotation angle between the first connecting piece and the second connecting piece. On the contrary, when it is necessary to change the relative position of two objects connected through the hinge structure, only the first connecting piece or/and the second connecting piece only needs to be buckled with force from the opposite side, that is, the clipping strip leaves from the limiting slot, so as to facilitate the relative rotation of the first connecting piece and second connecting piece to adjust the relative rotation angle between them. The hinge structure involves few parts and has a simple structure. The relative rotation angle between the first connecting piece and the second connecting piece can be fixed, so as to avoid the damage of the connecting piece or the failure of the hinge structure caused by the excessively large relative rotation angle, so as to improve the market competitiveness of the hinge structure.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

In order to make the above purpose, features and advantages of the present application more obvious and easy to understand, the specific embodiment of the present application is described in detail below in combination with the attached drawings. Many specific details are described in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many ways different from those described herein. Those skilled in the art can make similar improvements without violating the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

Please refer toFIG.1andFIG.2together, the present application provides a hinge structure10which has simple structure and can limit the rotation angle. The hinge structure10comprises a first connecting piece110and a second connecting piece120, wherein, the first connecting piece110is for fixing to an external object, and the second connecting piece120is for fixing to another external object. The first connecting piece110is rotationally connected with the second connecting piece120to realize the relative rotation of the two objects. Specially, the first connecting piece110is provided with a slot111, and the second connecting piece120is provided with a rotating shaft121matched with the slot111. The second connecting piece120rotates relative to the first connecting piece110when the rotating shaft121is inserted into the slot111and subjected to external force. An inner wall of the slot111is provided with a limiting slot112and an outer surface of the rotating shaft121is convex to form a clipping strip122; the clipping strip122is inserted into the limiting slot112to limit a relative rotation angle between the first connecting piece110and the second connecting piece120when the rotating shaft121is inserted into the slot111and rotates relative to the first connecting piece110.

Please refer toFIGS.2,3and4together. In one embodiment, an outer surface contour of the clipping strip122matches with an inner surface contour of the limiting slot112. Preferably, the outer surface of the clipping strip122is a circular arc surface, the limiting slot112is an arc groove butting with the arc surface, and the transition part between the arc groove and the inner wall surface of the slot111is provided with an arc transition part to reduce the wear of the clipping strip122by the transition part between the arc groove and the inner wall surface of the slot111, so as to prolong the service life of the clipping strip122, and ensure the reliability of the clipping strip122and the limiting slot112for the corner fixing operation of the hinge structure10.

Further, in one embodiment, the limiting slot112extends along a depth direction of the slot111, and the clipping strip122extends along a length direction of the rotating shaft121. That is, the limiting slot112is a straight slot whose length direction is perpendicular to any cross section of the slot111, and the clipping strip122is a long strip-shaped protrusion corresponding to the shape of the straight slot. In another embodiment, the limiting slot112is a spiral slot opened along the inner wall surface of the slot111, that is, while the limiting slot112extends along the depth direction of the slot111, it also extends along the circumferential direction of the inner wall surface of the slot111. The clipping strip122is a spiral protrusion arranged on the outer surface of the rotating shaft121and matched with the limiting slot112. Of course, if the processing conditions permit, the limiting slot112can also be divided into a plurality of relatively independent sub slots. Similarly, the clipping strip122is designed as a plurality of clipping strips distributed at intervals along the outer surface of the rotating shaft121. The specific requirements are determined according to the actual needs of the user, which will not be repeated here.

It should be noted that in one embodiment, the height of the clipping strip122along the radial direction of the rotating shaft121should be slightly less than or equal to the difference between the inner diameter of the slot111and the diameter of the rotating shaft121. In this way, ensuring that before the clipping strip122is not embedded in the limiting slot112, the rotating shaft121can rotate freely in the slot111, while avoiding the possibility that the clipping strip122may be separated from the limiting slot112by external impact after being embedded in the limiting slot112due to the large movable space of the rotating shaft121in the slot111, so as to improve the stability of the cooperation between the clipping strip122and the limiting slot112and the reliability of the relative corner fixing operation of the first connecting piece110and the second connecting piece120.

In one embodiment, the outer surface of the rotating shaft121is provided with two clipping strips122in parallel, the inner wall of the slot111is provided with at least one set of limiting slots112, and each set of the limiting slots112comprises two limiting slots112which are matched with the two clipping strips122one by one. Specifically, when the first connecting piece110rotates to a specified angle relative to the second connecting piece120and the relative angle between them needs to be fixed, the second connecting piece120is limited and matched with the two limiting slots112in the slot111of the first connecting piece110through two clipping strips122, that is, one clipping strip122is correspondingly embedded into one limiting slot112. In this way, the limit fit area between the first connecting piece110and the second connecting piece120is increased, and the stability of the connection between the first connecting piece110and the second connecting piece120is improved. After the first connecting piece110and the second connecting piece120rotate relative to each other to a specified angle, it is not easy to produce relative shaking, so as that the relative rotation angle between the first connecting piece110and the second connecting piece120can be fixed. In addition, by setting a plurality of sets of limiting slots112, when the first connecting piece110and the second connecting piece120rotate at a plurality of different angles, the clipping strip122can be embedded in the limiting slots112at different positions and butted with the inner surface of the limiting slot112, so as to fix a plurality of relative rotation angles between the first connecting piece110and the second connecting piece120.

Please refer toFIGS.3and4together. In one embodiment, the first connecting piece110comprises a first connecting column113provided with the slot111and a first connecting part114integrally formed with an outer surface of the first connecting column113; the second connecting piece120comprises a second connecting column123and a second connecting part124integrally formed with an outer surface of the second connecting column, the rotating shaft is arranged in the middle of the second connecting column123along an axial direction of the second connecting column123. The first connecting part114and the second connecting part124are respectively used to connect with the external object to be limited. Preferably, the first connecting part114and the second connecting part124are plate-shaped structures respectively, and the height of the first connecting part114along the axial direction of the first connecting column113is equal to the height of the second connecting part124along the axial direction of the second connecting column123, and the sum of the heights of the first connecting column113and the second connecting column123is equal to the height of the first connecting part114along the axial direction of the first connecting column113. The length of the rotating shaft121is less than or equal to the depth of the slot111.

In one embodiment, an end face of the first connecting column113protrudes at an edge of the slot111to form a first sector-annular convex portion115, an end face of the second connecting column123is recessed to form a second sector-annular recessed portion125half surrounding the rotating shaft121; when the rotating shaft121is inserted into the slot111the first sector-annular convex portion115is inserted into the second sector-annular recessed portion125, and can rotate in the second sector-annular recessed portion125to limit a rotation angle range between the first connecting piece110and the second connecting piece120. It should be noted that while the end face of the first connecting column113bulges at the edge of the slot111to form the first sector-annular convex portion115, the end face of the first connecting column113naturally forms a low position with a height lower than the first sector-annular convex portion115. The low position is the first sector-annular recessed portion116, and the first sector-annular recessed portion116forms a complete ring with the first sector-annular convex portion115. Similarly, while the end face of the second connecting column123is recessed to form a second sector-annular recessed portion125that half surrounds the rotating shaft121, the end face of the second connecting column123naturally forms a high position higher than the first sector-annular convex portion115. It is agreed that the high position is the second sector-annular convex portion126, and the second sector-annular recessed portion125forms another complete ring with the second sector-annular convex portion126. Thus, after the rotating shaft121of the second connecting piece120is inserted into the slot111of the first connecting piece110, the first sector-annular convex portion115is embedded into the second sector-annular recessed portion125, and the second sector-annular convex portion126is embedded into the first sector-annular recessed portion116, that is, the end face of the first connecting column113is concave convex matched with the end face of the second connecting column123.

Further, in one embodiment, a circumferential angle corresponding to the first sector-annular convex portion is between 90° and 120°, and a circumferential angle corresponding to the second sector-annular recessed portion is between 180° and 270°. The circumferential angle corresponding to the first sector-annular recessed portion116is between 240° and 270°, the circumferential angle corresponding to the second sector-annular convex portion126is between 90° and 180°. Thus, when the first sector-annular convex portion115is embedded in the second sector-annular recessed portion125and the second sector-annular convex portion126is embedded in the first sector-annular recessed portion116, the first connecting piece110can only rotate relative to the second connecting piece120within the difference angle between the circumferential angle corresponding to the first sector-annular convex portion115and the circumferential angle corresponding to the second sector-annular recessed125, or rotate relative to the second connecting piece120within the difference angle range between the circumferential angle corresponding to the second sector-annular convex portion126and the circumferential angle corresponding to the first sector-annular recessed116, and the specific difference is subject to the smaller difference. Thus, the maximum rotation angle range between the first connecting piece110and the second connecting piece120is limited to avoid the problem of excessive external load on the hinge structure10due to the excessive relative rotation angle between the first connecting piece110and the second connecting piece120, so as to prolong the service life of the hinge structure10.

In one embodiment, the first connecting part114is provided with a first recessed portion117that is rotatably matched with the outer surface of the second connecting column123, and the second connecting part124is provided with a second recessed portion127that is rotatably matched with the outer surface of the first connecting column113. In this way, when the first connecting piece110is inserted into the slot111through the rotating shaft121and rotates relative to the second connecting piece120, the first recessed portion117is adjacent or attached to the outer surface of the second connecting column123to restrict their relative movement in the radial direction of the second connecting column123, and the second recessed portion127is adjacent or attached to the outer surface of the first connecting column113to restrict their relative movement in the radial direction of the first connecting column113. Thus, the stability of the hinge structure10is further improved.

Please refer toFIG.5, the present application also provides a packaging box20. The packaging box20comprises the above hinge structure10. The packaging box20further comprises a face cover210and a bottom cover220, and the face cover210is connected with the bottom cover220through the hinge structure10. Further, the face cover210is provided with a face cover slot211, the bottom cover220is provided with a bottom cover slot221; the first connecting part114is inserted into the face cover slot211and is fixedly connected with the face cover210, and the second connecting part124is inserted into the bottom cover slot221and is fixedly connected with the bottom cover220. In this way, during the use of the packaging box20, the first connecting piece110can be driven to rotate relative to the second connecting piece120by lifting the face cover210to open the face cover210. After the face cover210and the bottom cover220are assembled through the hinge structure10, the face cover210can be opened at multiple angles, and it is convenient to fix the opening angle of the face cover210. The problem that the cover210rotates and damages the user is avoided, and the convenience of unpacking and taking things from the packaging box20is improved.

In the hinge structure and the packaging box provided by the present application, by the limiting slot arranged in the slot and the clipping strip arranged on the rotating shaft which is matched with the limiting slot, when the rotating shaft of the second connecting piece is inserted into the slot and the second connecting piece or/and the first connecting piece are subjected to an external deflection force, causing the first connecting piece to rotate relative to the second connecting piece, clipping strip slides along the inner wall of the slot until it is embedded in the limiting slot. In this way, the clipping strip is not easy to fall off from the limiting slot under the restriction of the limiting slot, so as to fix the relative rotation angle between the first connecting piece and the second connecting piece. On the contrary, when it is necessary to change the relative position of two objects connected through the hinge structure, only the first connecting piece or/and the second connecting piece only needs to be buckled with force from the opposite side, that is, the clipping strip leaves from the limiting slot, so as to facilitate the relative rotation of the first connecting piece and second connecting piece to adjust the relative rotation angle between them. The hinge structure involves few parts and has a simple structure. The relative rotation angle between the first connecting piece and the second connecting piece can be fixed, so as to avoid the damage of the connecting piece or the failure of the hinge structure caused by the excessively large relative rotation angle, so as to improve the market competitiveness of the hinge structure.

The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they shall be considered to be the scope recorded in this specification.

The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the patent of the present application. It should be noted that for ordinary technicians in the art, several deformations and improvements can be made without departing from the concept of the present application, which belong to the protection scope of the present application. Therefore, the scope of protection of the present application patent shall be subject to the appended claims.