Curved surface folding hinge and packaging box

Abstract

A curved surface folding hinge comprises a first leaf plate, a second leaf plate and a hinge shaft, the first leaf plate and the second leaf plate are connected through the hinge shaft, the first leaf plate comprises an upper end portion and a lower end portion, the upper end portion comprises an outer side face and an inner side face, the lower end portion comprises an outer side face and an inner side face, and the right side of the first leaf plate is connected with a first boss and a second boss. The first boss is connected with a first hinge column, the second boss is connected with a second hinge column, and the left side of the first leaf plate is connected with a first reed and a second reed; a packaging box comprises an upper cover, a lower cover and a curved surface folding hinge, the upper cover is provided with an upper cover curved surface connecting position, the lower cover is provided with a lower cover curved surface connecting position, the upper cover curved surface connecting position is connected with a first leaf plate, and the lower cover curved surface connecting position is connected with a second leaf plate. The curved surface folding hinge not only can be applied to the use environment with the curved surface at the bent position, but also is high in hiding performance, and the packaging box can be used in cooperation with the curved surface folding hinge and is attractive in appearance.

Description

Technical Field

[0001] The utility model relates to a hinge and a packaging box, belonging to the field of mechanical devices, and in particular to a curved folding hinge and a packaging box. Background Art

[0002] Hinges, also known as hinges, have existed since ancient times and are essentially two fixed plates connected by a hinge axis. These hinges are considered a type of hinge with a rotating shaft. For example, a door hinge is a device used to keep a door open or closed. However, this type of hinge has an unavoidable drawback: the bend of a door can only be a straight line.

[0003] The Chinese invention patent application number 202010581359.8, filed on June 23, 2020, discloses a detachable invisible hinge and its installation process, comprising a first hinge plate, a second hinge plate, and a hinge shaft. The first hinge plate and the second hinge plate are rotatably connected by the hinge shaft. A hinge plate through-groove is dug in the first hinge plate. The second hinge plate is adapted to the hinge plate through-groove so that the second hinge plate and the first hinge plate are located in the same plane. The provision of the hinge plate through-groove facilitates folding the first hinge plate and the second hinge plate in the same plane, which can reduce the thickness of the hinge after folding, thereby reducing the distance between the door and the door frame, thereby further improving the door's invisibility and improving the indoor aesthetics. Although this invention solves the problem of poor concealment and improves aesthetics, it still has the following defects:

[0004] This invention cannot be applied to environments where the bends are curved.

[0005] The information disclosed in this background technology section is only intended to increase understanding of the overall background of the application and should not be considered as an admission or any form of suggestion that the information constitutes the prior art already known to ordinary technicians in this field. Summary of the Invention

[0006] The purpose of the utility model is to overcome the defect that the existing hinge cannot be applied to the curved surface at the bending part, and to provide a curved surface folding hinge and a packaging box that can be applied to the curved surface at the bending part.

[0007] In order to achieve the above objectives, the technical solution of the present utility model is:

[0008] A curved folding hinge, which includes a first leaf plate, a second leaf plate, and a hinge shaft. The first leaf plate and the second leaf plate are rotatably connected via the hinge shaft. The first leaf plate includes an upper end and a lower end. The upper end includes an outer side surface and an inner side surface. The lower end includes an outer side surface and an inner side surface. The right side of the first leaf plate is connected to a first boss and a second boss. The first boss is connected to a first hinge column. The second boss is connected to a second hinge column. The left side of the first leaf plate is connected to a first spring and a second spring.

[0009] The first spring piece includes an arcuate bar-shaped body and a straight bar-shaped body, and the second spring piece includes an arcuate bar-shaped body and a straight bar-shaped body;

[0010] One end of the arc-shaped bar is connected to the inner side surface of the upper end, and the other end is connected to the straight bar, and the straight bar is parallel to the upper end; one end of the arc-shaped bar is connected to the inner side surface of the lower end, and the other end is connected to the straight bar, and the straight bar is parallel to the lower end.

[0011] The first spring piece includes an arc-shaped bar, an arc-shaped bar, an arc-shaped bar, a straight bar, a straight bar, a straight bar, and a straight bar; the second spring piece includes an arc-shaped bar, an arc-shaped bar, an arc-shaped bar, a straight bar, a straight bar, a straight bar, and a straight bar;

[0012] One end of the straight strip is connected to the inner side surface of the upper end, and the other end is connected to the arc strip, the straight strip, the arc strip, the straight strip, the arc strip, and the straight strip in sequence. The straight strip and the straight strip are all parallel to the first blade, and the straight strip and the straight strip are all parallel to the upper end; one end of the straight strip is connected to the inner side surface of the lower end, and the other end is connected to the arc strip, the straight strip, the arc strip, the straight strip, the arc strip, and the straight strip in sequence. The straight strip and the straight strip are all parallel to the first blade, and the straight strip and the straight strip are all parallel to the lower end.

[0013] The first spring piece includes an arc-shaped bar, an arc-shaped bar, an arc-shaped bar, an arc-shaped bar, a straight bar, a straight bar, a straight bar, and a straight bar; the second spring piece includes an arc-shaped bar, an arc-shaped bar, an arc-shaped bar, an arc-shaped bar, a straight bar, a straight bar, a straight bar, and a straight bar;

[0014] One end of the arc-shaped bar is connected to the left middle area of ​​the first blade, and the other end is connected to the straight bar, arc-shaped bar, straight bar, arc-shaped bar, straight bar, arc-shaped bar, and straight bar in sequence. The straight bar, straight bar, and straight bar are all parallel to the first blade, and the straight bar is parallel to the upper end; one end of the arc-shaped bar is connected to the left middle area of ​​the first blade, and the other end is connected to the straight bar, arc-shaped bar, straight bar, arc-shaped bar, straight bar, arc-shaped bar, and straight bar in sequence. The straight bar, straight bar, and straight bar are all parallel to the first blade, and the straight bar is parallel to the lower end.

[0015] The first boss and the second boss are both rectangular parallelepiped or prism-shaped, the first hinge column and the second hinge column are both cylindrical, the upper bottom surface of the first boss is integrally connected to the side surface of the first hinge column, the upper bottom surface of the second boss is integrally connected to the side surface of the second hinge column, and the lower bottom surfaces of the first boss and the second boss are integrally connected to the right side of the first leaf plate.

[0016] The first hinge column is provided with a first hinge shaft assembly hole, and the second hinge column is provided with a second hinge shaft assembly hole. The center of the first hinge shaft assembly hole coincides with the center of the first hinge column, and the center of the second hinge shaft assembly hole coincides with the center of the second hinge column.

[0017] The structure of the left side of the second blade is consistent with the structure of the right side of the first blade, and the structure of the right side of the second blade is consistent with or inconsistent with the structure of the left side of the first blade.

[0018] A packaging box, comprising an upper cover, a lower cover, and a curved folding hinge, wherein the curved folding hinge is a curved folding hinge as described above;

[0019] The upper cover is provided with an upper cover curved surface connection, and the lower cover is provided with a lower cover curved surface connection, the upper cover curved surface connection is connected to the first vane, and the lower cover curved surface connection is connected to the second vane, and the upper cover curved surface connection is provided with a first reed stopper and a second reed stopper, the first reed stopper includes a first side surface and a bottom surface, the second reed stopper includes a second side surface and a bottom surface, the first side surface contacts the outer side surface of the upper end portion of the first vane, and the second side surface contacts the outer side surface of the lower end portion of the first vane, the first reed stopper and the second reed stopper clamp the first vane in the middle, and an end of the first reed away from the first vane is pressed against the bottom surface of the first reed stopper, and an end of the second reed away from the first vane is pressed against the bottom surface of the second reed stopper.

[0020] The upper cover and the lower cover are elliptical structures of equal area. The edge lines of the relative areas where the upper cover curved surfaces are connected are wavy structures. The edge lines of the relative areas where the lower cover curved surfaces are connected are wavy structures. The area within the edge line of the upper cover is inclined downward and concave to form an upper cover accommodating space, and the area within the edge line of the lower cover is inclined downward and concave to form a lower cover accommodating space.

[0021] An upper cover charging interface is provided in the upper cover accommodating space, and a lower cover charging interface is provided in the lower cover accommodating space. The upper cover charging interface is located in the center area of ​​the upper cover accommodating space, and the lower cover charging interface is located in the center area of ​​the lower cover accommodating space.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. The utility model provides a curved folding hinge and a packaging box, wherein the curved folding hinge includes a first leaf plate, a second leaf plate, and a hinge shaft, wherein the first leaf plate and the second leaf plate are rotatably connected via the hinge shaft, the first leaf plate includes an upper end portion and a lower end portion, the upper end portion includes an outer side surface and an inner side surface, the lower end portion includes an outer side surface and an inner side surface, the right side of the first leaf plate is connected to a first boss and a second boss, the first boss is connected to a first hinge column, the second boss is connected to a second hinge column, and the left side of the first leaf plate is connected to a first spring leaf and a second spring leaf. During use, the first leaf is connected to the first bending body, and the second leaf is connected to the second bending body. Two spring blocks are provided at the connection between the first bending body and the first leaf. The first leaf contacts the side surfaces of the two spring blocks, and the two spring blocks clamp the first leaf in the middle. When the first and second bending bodies are unfolded, the first leaf slides along the side surfaces of the two spring blocks, thereby preventing the first and second bending bodies from interfering with each other and increasing the unfolding angle of the first and second bending bodies. When the first and second bending bodies are folded, the first leaf rebounds under the action of the first and second springs, thereby reducing the exposed space of the curved folding hinge and improving its concealment. Therefore, the curved folding hinge of the present invention is not only applicable to environments where the bending part is curved, but also highly concealable.

[0024] 2. In the curved folding hinge and packaging box of the present invention, the first spring leaf and the second spring leaf are composed of a combination of an arc-shaped bar and a straight bar; the structure of the left side of the second leaf plate is consistent with the structure of the right side of the first leaf plate, and the structure of the right side of the second leaf plate is consistent with or inconsistent with the structure of the left side of the first leaf plate. When used, the combined structure of the arc-shaped bar and the straight bar of the first spring leaf and the second spring leaf can provide greater elasticity while having good mechanical properties; as long as the left side of the second leaf plate can be connected to the right side of the first leaf plate through the hinge shaft, it can be used in conjunction with the other, and there is no fixed requirement for the structure of the right side of the second leaf plate. Therefore, the curved folding hinge of the present invention not only has good elasticity and strong mechanical properties for the first and second spring leaves, but also has many combinations of the first and second leaf plates and a wide range of applications.

[0025] 3. The present invention provides a curved folding hinge and packaging box, wherein the packaging box includes an upper cover, a lower cover, and a curved folding hinge. The upper cover is provided with an upper cover curved connection, and the lower cover is provided with a lower cover curved connection. The edge lines of the areas opposite to the upper cover curved connection are wavy structures, and the edge lines of the areas opposite to the lower cover curved connection are wavy structures. The area within the upper cover edge line is inclined downward and concave to form an upper cover accommodating space, and the area within the lower cover edge line is inclined downward and concave to form a lower cover accommodating space. When used, the upper cover accommodating space and the lower cover accommodating space allow the packaging box to hold some smaller daily necessities, and the design of the edge lines of the areas opposite to the upper cover curved connection and the lower cover curved connection being wavy structures makes the overall appearance more beautiful. Therefore, the packaging box of the present invention can not only store smaller daily necessities, but also has an aesthetically pleasing appearance.

[0026] 4. In the curved folding hinge and packaging box of the present invention, an upper cover charging port is provided within the upper cover accommodating space of the packaging box, and a lower cover charging port is provided within the lower cover accommodating space of the packaging box. When in use, the upper cover charging port and the lower cover charging port provide charging functionality. Therefore, the packaging box of the present invention can provide charging functionality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of a curved folding hinge.

[0028] Figure 2 This is a schematic structural diagram of the first blade in Example 2.

[0029] Figure 3 This is a schematic structural diagram of the first blade in Example 3.

[0030] Figure 4 It is a structural diagram of the packaging box.

[0031] Figure 5 yes Figure 4 Schematic diagram of the structure of the upper cover of the middle packaging box.

[0032] Figure 6 yes Figure 4 Schematic diagram of the structure of the lower cover of the middle packaging box.

[0033] Figure 7 It is a schematic diagram of the partial structure of the curved folding hinge installed on the packaging box.

[0034] Figure 8 This is an application schematic diagram when the structure on the right side of the second blade in Example 4 is consistent with the structure on the left side of the first blade.

[0035] Figure 9 This is an application schematic diagram when the structure on the right side of the second blade in Example 4 is inconsistent with the structure on the left side of the first blade.

[0036] In the figure: the first blade 1, the upper end 11, the outer side 111, the inner side 112, the lower end 12, the outer side 121, the inner side 122, the first boss 13, the first hinge column 131, the first hinge shaft assembly hole 132, the second boss 14, the second hinge column 141, the second hinge shaft assembly hole 142, the first spring 15, the arc-shaped body 151, the straight strip 152, the arc-shaped body 153, the arc-shaped body 154, the arc-shaped body 155, the straight strip 156, the straight strip 157, the straight strip 158, the second spring 16, the arc-shaped body 161, Straight strip 162, curved strip 163, curved strip 164, curved strip 165, straight strip 166, straight strip 167, straight strip 168, second blade 2, hinge axis 3, upper cover 4, upper cover curved surface connection 41, first spring block 42, first side 421, bottom 422, second spring block 43, second side 431, bottom 432, relative area 44, upper cover accommodating space 45, upper cover charging interface 451, lower cover 5, lower cover curved surface connection 51, relative area 52, lower cover accommodating space 53, lower cover charging interface 531. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0038] See also Figure 1 — Figure 7A curved folding hinge, the curved folding hinge includes a first leaf plate 1, a second leaf plate 2, and a hinge shaft 3. The first leaf plate 1 and the second leaf plate 2 are rotatably connected through the hinge shaft 3. The first leaf plate 1 includes an upper end 11 and a lower end 12. The upper end 11 includes an outer side surface 111 and an inner side surface 112. The lower end 12 includes an outer side surface 121 and an inner side surface 122. The right side of the first leaf plate 1 is connected to a first boss 13 and a second boss 14. The first boss 13 is connected to a first hinge column 131, and the second boss 14 is connected to a second hinge column 141. The left side of the first leaf plate 1 is connected to a first spring 15 and a second spring 16.

[0039] The first spring piece 15 includes an arcuate bar-shaped body 151 and a straight bar-shaped body 152 , and the second spring piece 16 includes an arcuate bar-shaped body 161 and a straight bar-shaped body 162 ;

[0040] One end of the arc-shaped bar 151 is connected to the inner side surface 112 of the upper end portion 11, and the other end is connected to the straight bar 152, and the straight bar 152 is parallel to the upper end portion 11; one end of the arc-shaped bar 161 is connected to the inner side surface 122 of the lower end portion 12, and the other end is connected to the straight bar 162, and the straight bar 162 is parallel to the lower end portion 12.

[0041] The first spring piece 15 includes an arcuate bar 151, an arcuate bar 153, an arcuate bar 154, a straight bar 152, a straight bar 156, a straight bar 157, and a straight bar 158. The second spring piece 16 includes an arcuate bar 161, an arcuate bar 163, an arcuate bar 164, a straight bar 162, a straight bar 166, a straight bar 167, and a straight bar 168.

[0042] One end of the straight strip 152 is connected to the inner side surface 112 of the upper end portion 11, and the other end is connected to the arc strip 151, the straight strip 158, the arc strip 153, the straight strip 156, the arc strip 154, and the straight strip 157 in sequence. The straight strip 152 and the straight strip 156 are parallel to the first blade 1, and the straight strip 157 and the straight strip 158 are parallel to the upper end portion 11; one end of the straight strip 162 is connected to the inner side surface 122 of the lower end portion 12, and the other end is connected to the arc strip 161, the straight strip 168, the arc strip 163, the straight strip 166, the arc strip 164, and the straight strip 167 in sequence. The straight strip 162 and the straight strip 166 are parallel to the first blade 1, and the straight strip 167 and the straight strip 168 are parallel to the lower end portion 12.

[0043] The first spring piece 15 includes an arcuate bar 151, an arcuate bar 153, an arcuate bar 154, an arcuate bar 155, a straight bar 152, a straight bar 156, a straight bar 157, and a straight bar 158. The second spring piece 16 includes an arcuate bar 161, an arcuate bar 163, an arcuate bar 164, an arcuate bar 165, a straight bar 162, a straight bar 166, a straight bar 167, and a straight bar 168.

[0044] One end of the arcuate bar 151 is connected to the left middle area of ​​the first blade 1, and the other end is connected to the straight bar 152, the arcuate bar 153, the straight bar 156, the arcuate bar 154, the straight bar 157, the arcuate bar 155, and the straight bar 158 in sequence. The straight bar 152, the straight bar 156, and the straight bar 157 are all parallel to the first blade 1, and the straight bar 158 is parallel to the upper end 11. One end of the arc-shaped bar 161 is connected to the left middle area of ​​the first blade 1, and the other end is connected to the straight bar 162, the arc-shaped bar 163, the straight bar 166, the arc-shaped bar 164, the straight bar 167, the arc-shaped bar 165, and the straight bar 168 in sequence. The straight bar 162, the straight bar 166, and the straight bar 167 are all parallel to the first blade 1, and the straight bar 168 is parallel to the lower end 12.

[0045] The first boss 13 and the second boss 14 are both rectangular parallelepipeds or prisms, the first hinge column 131 and the second hinge column 141 are both cylinders, the upper bottom surface of the first boss 13 is integrally connected to the side surface of the first hinge column 131, the upper bottom surface of the second boss 14 is integrally connected to the side surface of the second hinge column 141, and the lower bottom surfaces of the first boss 13 and the second boss 14 are integrally connected to the right side of the first leaf plate 1.

[0046] The first hinge column 131 is provided with a first hinge shaft assembly hole 132, and the second hinge column 141 is provided with a second hinge shaft assembly hole 142. The center of the first hinge shaft assembly hole 132 coincides with the center of the first hinge column 131, and the center of the second hinge shaft assembly hole 142 coincides with the center of the second hinge column 141.

[0047] The structure of the left side of the second blade 2 is consistent with the structure of the right side of the first blade 1 , and the structure of the right side of the second blade 2 is consistent with or inconsistent with the structure of the left side of the first blade 1 .

[0048] A packaging box, comprising an upper cover 4, a lower cover 5, and a curved folding hinge, wherein the curved folding hinge is a curved folding hinge as described above;

[0049] The upper cover 4 is provided with an upper cover curved surface connection 41, and the lower cover 5 is provided with a lower cover curved surface connection 51. The upper cover curved surface connection 41 is connected to the first blade 1, and the lower cover curved surface connection 51 is connected to the second blade 2. The upper cover curved surface connection 41 is provided with a first spring stopper 42 and a second spring stopper 43. The first spring stopper 42 includes a first side surface 421 and a bottom surface 422. The second spring stopper 43 includes a second side surface 431 and a bottom surface 432. The first side surface 421 contacts the outer side surface 111 of the upper end portion 11 of the first vane 1, and the second side surface 431 contacts the outer side surface 121 of the lower end portion 12 of the first vane 1. The first reed stopper 42 and the second reed stopper 43 clamp the first vane 1 in the middle, and the end of the first reed 15 away from the first vane 1 is pressed against the bottom surface 422 of the first reed stopper 42, and the end of the second reed 16 away from the first vane 1 is pressed against the bottom surface 432 of the second reed stopper 43.

[0050] The upper cover 4 and the lower cover 5 are elliptical structures of equal area. The edge line of the relative area 44 of the upper cover curved surface connection 41 is a wavy structure, and the edge line of the relative area 52 of the lower cover curved surface connection 51 is a wavy structure. The area within the edge line of the upper cover 4 is tilted downward and recessed to form an upper cover accommodating space 45, and the area within the edge line of the lower cover 5 is tilted downward and recessed to form a lower cover accommodating space 53.

[0051] An upper cover charging interface 451 is provided in the upper cover accommodating space 45 , and a lower cover charging interface 531 is provided in the lower cover accommodating space 53 . The upper cover charging interface 451 is located in the center area of ​​the upper cover accommodating space 45 , and the lower cover charging interface 531 is located in the center area of ​​the lower cover accommodating space 53 .

[0052] The supplementary technical features of this utility model are as follows:

[0053] In this design, the first reed 15 and the second reed 16 of the first blade 1 are symmetrical up and down along the center line of the first blade 1 .

[0054] In this design, the upper cover 4 and the lower cover 5 are preferably a double-layer structure. The upper cover 4 and the lower cover 5 both include an inner shell and an outer shell. At the upper cover curved surface connection 41, a cavity is provided between the inner shell and the outer shell. The first reed stopper 42 and the second reed stopper 43 are provided in the cavity and connected to the outer shell; at the lower cover curved surface connection 51, a cavity is also provided between the inner shell and the outer shell for connecting the second blade 2. Preferably, the second blade 2 is connected to the outer shell as a whole.

[0055] Example 1:

[0056] See also Figure 1 — Figure 7A curved folding hinge includes a first leaf plate 1, a second leaf plate 2, and a hinge shaft 3. The first leaf plate 1 and the second leaf plate 2 are rotatably connected through the hinge shaft 3. The first leaf plate 1 includes an upper end 11 and a lower end 12. The upper end 11 includes an outer side surface 111 and an inner side surface 112. The lower end 12 includes an outer side surface 121 and an inner side surface 122. The right side of the first leaf plate 1 is connected to a first boss 13 and a second boss 14. The first boss 13 is connected to a first hinge column 131, and the second boss 14 is connected to a second hinge column 141. The left side of the first leaf plate 1 is connected to a first spring 15 and a second spring 16.

[0057] When in use, the first leaf plate 1 is connected to the first bending body, and the second leaf plate 2 is connected to the second bending body. Two spring stops are provided at the connection between the first bending body and the first leaf plate 1. The two spring stops clamp the first leaf plate 1 in the middle, and the outer side surface 111 and the outer side surface 121 of the first leaf plate 1 are in contact with the side surfaces of the two spring stops respectively; when the first bending body and the second bending body are unfolded, the first leaf plate 1 will slide along the side surfaces of the spring stoppers, thereby avoiding interference between the first bending body and the second bending body, and increasing the unfolding angle of the first bending body and the second bending body; when the first bending body and the second bending body are folded, the first leaf plate 1 will rebound under the action of the first spring 15 and the second spring 16, thereby reducing the exposed space of the curved folding hinge to improve concealment.

[0058] Example 2:

[0059] The basic content is the same as Example 1, except that:

[0060] The first spring piece 15 includes an arc-shaped bar 151, an arc-shaped bar 153, an arc-shaped bar 154, a straight bar 152, a straight bar 156, a straight bar 157, and a straight bar 158. The second spring piece 16 includes an arc-shaped bar 161, an arc-shaped bar 163, an arc-shaped bar 164, a straight bar 162, a straight bar 166, a straight bar 167, and a straight bar 168. One end of the straight bar 152 is connected to the inner side surface 112 of the upper end portion 11, and the other end is connected to the arc-shaped bar 151, the straight bar 158, the arc-shaped bar 153, the straight bar 156, the arc The linear body 154, the straight strip body 157, the straight strip body 152, and the straight strip body 156 are all parallel to the first blade 1, and the straight strip body 157 and the straight strip body 158 are all parallel to the upper end portion 11; one end of the straight strip body 162 is connected to the inner side surface 122 of the lower end portion 12, and the other end is connected to the arc strip body 161, the straight strip body 168, the arc strip body 163, the straight strip body 166, the arc strip body 164, and the straight strip body 167 in sequence, the straight strip body 162 and the straight strip body 166 are all parallel to the first blade 1, and the straight strip body 167 and the straight strip body 168 are all parallel to the lower end portion 12.

[0061] When in use, the first spring 15 and the second spring 16 are designed to be a combination structure of an arc-shaped bar and a straight bar, and one end of the first spring 15 and one end of the second spring 16 are respectively connected to the inner side surface 112 of the upper end portion 11 and the inner side surface 122 of the lower end portion 12, which can provide greater elasticity and a longer sliding distance when the first blade 1 slides along the side of the spring block, so that the first bending body and the second bending body can be expanded at a larger angle; and this combination structure of an arc-shaped bar and a straight bar can improve the overall aesthetic performance.

[0062] Example 3:

[0063] The basic content is the same as Example 1, except that:

[0064] The first spring piece 15 includes an arcuate bar 151, an arcuate bar 153, an arcuate bar 154, an arcuate bar 155, a straight bar 152, a straight bar 156, a straight bar 157, and a straight bar 158. The second spring piece 16 includes an arcuate bar 161, an arcuate bar 163, an arcuate bar 164, an arcuate bar 165, a straight bar 162, a straight bar 166, a straight bar 167, and a straight bar 168.

[0065] One end of the arcuate bar 151 is connected to the left middle area of ​​the first blade 1, and the other end is connected to the straight bar 152, the arcuate bar 153, the straight bar 156, the arcuate bar 154, the straight bar 157, the arcuate bar 155, and the straight bar 158 in sequence. The straight bar 152, the straight bar 156, and the straight bar 157 are all parallel to the first blade 1, and the straight bar 158 is parallel to the upper end 11. One end of the arc-shaped bar 161 is connected to the left middle area of ​​the first blade 1, and the other end is connected to the straight bar 162, the arc-shaped bar 163, the straight bar 166, the arc-shaped bar 164, the straight bar 167, the arc-shaped bar 165, and the straight bar 168 in sequence. The straight bar 162, the straight bar 166, and the straight bar 167 are all parallel to the first blade 1, and the straight bar 168 is parallel to the lower end portion 12.

[0066] When in use, the first spring 15 and the second spring 16 are designed to be a combination structure of an arc-shaped bar and a straight-line bar, which can provide greater elasticity and a longer sliding distance when the first blade 1 slides along the side of the spring stopper, so that the unfolding angle of the first bending body and the second bending body can be larger; one end of the first spring 15 and one end of the second spring 16 are both connected to the left middle area of ​​the first blade 1, which can provide stronger mechanical properties for the first blade 1 as a whole.

[0067] Example 4:

[0068] The basic content is the same as Example 1, except that:

[0069] See also Figure 8 — Figure 9 , the structure on the left side of the second blade 2 is consistent with the structure on the right side of the first blade 1, and the structure on the right side of the second blade 2 is consistent with or inconsistent with the structure on the left side of the first blade 1; Figure 8 As shown, the structure on the right side of the second blade 2 is consistent with the structure on the left side of the first blade 1; Figure 9 As shown, the structure on the right side of the second blade 2 is inconsistent with the structure on the left side of the first blade 1 .

[0070] When in use, as long as the left side of the second blade 2 can be connected to the right side of the first blade 1 through the hinge axis, it can be used in combination. There is no fixed requirement for the structure of the right side of the second blade 2, and the connection method between the second blade 2 and the second bending body can be an integral connection or a connection method like the connection between the first blade 1 and the first bending body, depending on the actual application.

[0071] Example 5:

[0072] The basic content is the same as Example 1, except that:

[0073] The bending body used in conjunction with the curved folding hinge is a packaging box in the present invention. The packaging box includes an upper cover 4, a lower cover 5, and a curved folding hinge. The upper cover 4 is provided with an upper cover curved surface connection 41, and the lower cover 5 is provided with a lower cover curved surface connection 51. The upper cover curved surface connection 41 is connected to the first leaf plate 1, and the lower cover curved surface connection 51 is connected to the second leaf plate 2. The upper cover curved surface connection 41 is provided with a first spring stopper 42 and a second spring stopper 43. The first spring stopper 42 includes a first side surface 421 and a bottom surface 422. The second spring stopper 43 includes a first side surface 421 and a bottom surface 422. The stopper 43 includes a second side surface 431 and a bottom surface 432. The first side surface 421 contacts the outer side surface 111 of the upper end portion 11 of the first vane 1, and the second side surface 431 contacts the outer side surface 121 of the lower end portion 12 of the first vane 1. The first reed stopper 42 and the second reed stopper 43 clamp the first vane 1 in the middle. The end of the first reed 15 away from the first vane 1 is pressed against the bottom surface 422 of the first reed stopper 42, and the end of the second reed 16 away from the first vane 1 is pressed against the bottom surface 432 of the second reed stopper 43.

[0074] During use, when the packaging box is unfolded, the first leaf plate 1 will slide along the first side surface 421 and the second side surface 431, thereby avoiding interference between the upper cover 4 and the lower cover 5, and increasing the unfolding angle of the upper cover 4 and the lower cover 5; when the packaging box is folded, the first leaf plate 1 will rebound under the action of the first spring 15 and the second spring 16, thereby reducing the exposed space of the curved folding hinge to improve concealment.

[0075] Example 6:

[0076] The basic content is the same as Example 5, except that:

[0077] The upper cover 4 and the lower cover 5 are elliptical structures of equal area. The edge line of the relative area 44 of the upper cover curved surface connection 41 is a wavy structure, and the edge line of the relative area 52 of the lower cover curved surface connection 51 is a wavy structure. The area within the edge line of the upper cover 4 is tilted downward and recessed to form an upper cover accommodating space 45, and the area within the edge line of the lower cover 5 is tilted downward and recessed to form a lower cover accommodating space 53; an upper cover charging interface 451 is provided in the upper cover accommodating space 45, and a lower cover charging interface 531 is provided in the lower cover accommodating space 53. The upper cover charging interface 451 is located in the center area of ​​the upper cover accommodating space 45, and the lower cover charging interface 531 is located in the center area of ​​the lower cover accommodating space 53.

[0078] When in use, the upper cover 4 and the lower cover 5 are designed to be elliptical structures with equal areas, and the edge lines of the relative area 44 of the upper cover curved surface connection 41 and the relative area 52 of the lower cover curved surface connection 51 are designed to be wavy structures, which can make the overall packaging box look more beautiful; the upper cover charging interface 451 and the lower cover charging interface 531 can provide charging function.

[0079] The above description is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the content disclosed in the present invention should be included in the protection scope recorded in the claims.

Claims

1. A curved folding hinge, characterized by: The curved folding hinge comprises a first blade (1), a second blade (2), and a hinge shaft (3); the first blade (1) and the second blade (2) are rotatably connected via the hinge shaft (3); the first blade (1) comprises an upper end portion (11) and a lower end portion (12); the upper end portion (11) comprises an upper outer side surface (111) and an upper inner side surface (112); the lower end portion (12) comprises a lower outer side surface (121) and a lower inner side surface (122); the right side of the first blade (1) is connected to a first boss (13) and a second boss (14); the first boss (13) is connected to a first hinge column (131); the second boss (14) is connected to a second hinge column (141); and the left side of the first blade (1) is connected to a first spring leaf (15) and a second spring leaf (16).

2. The curved folding hinge according to claim 1, characterized in that: The first reed (15) includes an upper first arc-shaped bar (151) and an upper first straight bar (152); the second reed (16) includes a lower first arc-shaped bar (161) and a lower first straight bar (162); One end of the upper first arc strip (151) is connected to the upper inner side surface (112) of the upper end portion (11), and the other end is connected to the upper first straight strip (152), and the upper first straight strip (152) is parallel to the upper end portion (11); one end of the lower first arc strip (161) is connected to the lower inner side surface (122) of the lower end portion (12), and the other end is connected to the lower first straight strip (162), and the lower first straight strip (162) is parallel to the lower end portion (12).

3. The curved folding hinge according to claim 2, characterized in that: The first spring piece (15) includes an upper first arc-shaped bar (151), an upper second arc-shaped bar (153), an upper third arc-shaped bar (154), an upper first straight bar (152), an upper second straight bar (156), an upper third straight bar (157), and an upper fourth straight bar (158); the second spring piece (16) includes a lower first arc-shaped bar (161), a lower second arc-shaped bar (163), a lower third arc-shaped bar (164), a lower first straight bar (162), a lower second straight bar (166), a lower third straight bar (167), and a lower fourth straight bar (168); One end of the upper first straight strip (152) is connected to the upper inner side surface (112) of the upper end portion (11), and the other end is sequentially connected to the upper first arc strip (151), the upper fourth straight strip (158), the upper second arc strip (153), the upper second straight strip (156), the upper third arc strip (154), and the upper third straight strip (157). The upper first straight strip (152) and the upper second straight strip (156) are parallel to the first blade (1), and the upper third straight strip (157) and the upper fourth straight strip (158) are parallel to the upper end portion (11). One end of the lower first straight strip (162) is connected to the lower inner side surface (122) of the lower end portion (12), and the other end is connected in sequence to the lower first arc strip (161), the lower fourth straight strip (168), the lower second arc strip (163), the lower second straight strip (166), the lower third arc strip (164), and the lower third straight strip (167). The lower first straight strip (162) and the lower second straight strip (166) are both parallel to the first blade (1), and the lower third straight strip (167) and the lower fourth straight strip (168) are both parallel to the lower end portion (12).

4. A curved folding hinge according to claim 1, 2 or 3, characterized in that: The first spring piece (15) includes an upper first arc-shaped bar (151), an upper second arc-shaped bar (153), an upper third arc-shaped bar (154), an upper fourth arc-shaped bar (155), an upper first straight bar (152), an upper second straight bar (156), an upper third straight bar (157), and an upper fourth straight bar (158); the second spring piece (16) includes a lower first arc-shaped bar (161), a lower second arc-shaped bar (163), a lower third arc-shaped bar (164), a lower fourth arc-shaped bar (165), a lower first straight bar (162), a lower second straight bar (166), a lower third straight bar (167), and a lower fourth straight bar (168); One end of the upper first arc strip (151) is connected to the left middle area of ​​the first blade (1), and the other end is connected in sequence to the upper first straight strip (152), the upper second arc strip (153), the upper second straight strip (156), the upper third arc strip (154), the upper third straight strip (157), the upper fourth arc strip (155), and the upper fourth straight strip (158); the upper first straight strip (152), the upper second straight strip (156), and the upper third straight strip (157) are all parallel to the first blade (1), and the upper fourth straight strip (158) is parallel to the upper end portion (11); One end of the lower first arc strip (161) is connected to the left middle area of ​​the first blade (1), and the other end is connected in sequence to the lower first straight strip (162), the lower second arc strip (163), the lower second straight strip (166), the lower third arc strip (164), the lower third straight strip (167), the lower fourth arc strip (165), and the lower fourth straight strip (168). The lower first straight strip (162), the lower second straight strip (166), and the lower third straight strip (167) are all parallel to the first blade (1), and the lower fourth straight strip (168) is parallel to the lower end portion (12).

5. A curved folding hinge according to claim 1, 2 or 3, characterized in that: The first boss (13) and the second boss (14) are both rectangular parallelepipeds or prisms, the first hinge column (131) and the second hinge column (141) are both cylindrical, the upper bottom surface of the first boss (13) is integrally connected to the side surface of the first hinge column (131), the upper bottom surface of the second boss (14) is integrally connected to the side surface of the second hinge column (141), and the lower bottom surfaces of the first boss (13) and the second boss (14) are integrally connected to the right side of the first blade (1).

6. The curved folding hinge according to claim 5, characterized in that: The first hinge column (131) is provided with a first hinge shaft assembly hole (132), and the second hinge column (141) is provided with a second hinge shaft assembly hole (142), the center of the first hinge shaft assembly hole (132) coincides with the center of the first hinge column (131), and the center of the second hinge shaft assembly hole (142) coincides with the center of the second hinge column (141).

7. A curved folding hinge according to claim 1, 2 or 3, characterized in that: The structure on the left side of the second blade (2) is consistent with the structure on the right side of the first blade (1), and the structure on the right side of the second blade (2) is consistent with or inconsistent with the structure on the left side of the first blade (1).

8. A packaging box, characterized in that: The packaging box comprises an upper cover (4), a lower cover (5), and a curved folding hinge, wherein the curved folding hinge is a curved folding hinge according to claim 1, 2 or 3; The upper cover (4) is provided with an upper cover curved surface connection (41), and the lower cover (5) is provided with a lower cover curved surface connection (51). The upper cover curved surface connection (41) is connected to the first blade (1), and the lower cover curved surface connection (51) is connected to the second blade (2). The upper cover curved surface connection (41) is provided with a first reed stopper (42) and a second reed stopper (43). The first reed stopper (42) includes a first side surface (421) and a first bottom surface (422). The second reed stopper (43) includes a second side surface (431) and a second bottom surface (432). The first The side surface (421) contacts the upper outer side surface (111) of the upper end portion (11) of the first blade (1), and the second side surface (431) contacts the lower outer side surface (121) of the lower end portion (12) of the first blade (1). The first spring stopper (42) and the second spring stopper (43) clamp the first blade (1) in the middle. An end of the first spring (15) away from the first blade (1) is pressed against the first bottom surface (422) of the first spring stopper (42), and an end of the second spring (16) away from the first blade (1) is pressed against the second bottom surface (432) of the second spring stopper (43).

9. The packaging box according to claim 8, characterized in that: The upper cover (4) and the lower cover (5) are elliptical structures of equal area. The edge line of the relative area (44) of the upper cover curved surface connection (41) is a wavy structure. The edge line of the relative area (52) of the lower cover curved surface connection (51) is a wavy structure. The area within the edge line of the upper cover (4) is tilted downward and concave to form an upper cover accommodating space (45). The area within the edge line of the lower cover (5) is tilted downward and concave to form a lower cover accommodating space (53).

10. The packaging box according to claim 9, characterized in that: An upper cover charging interface (451) is provided in the upper cover accommodating space (45), and a lower cover charging interface (531) is provided in the lower cover accommodating space (53). The upper cover charging interface (451) is located in the center of the upper cover accommodating space (45), and the lower cover charging interface (531) is located in the center of the lower cover accommodating space (53).

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