Hinge device and foldable container having the same

Abstract

The present invention provides a hinge device and a foldable container having the same, the hinge device comprising a fixed hinge, a movable hinge and a locking mechanism; the movable hinge is pivotally connected to the fixed hinge between a horizontal position and a vertical position; the locking mechanism is pivotally connected to the fixed hinge between a locked position and a released position, the locking mechanism comprising a bracket, a handle and a locking block, the bracket is pivotally connected to the fixed hinge, the handle is connected to the bracket, and the locking block is movably clamped to the bracket; in the process of the movable hinge pivoting from the horizontal position to the vertical position, the movable hinge can push the locking block located at the locking position so that the movable hinge located at the vertical position is at least partially below the locking block located at the locking position; in the process of the movable hinge pivoting from the vertical position to the horizontal position, the locking block blocks the movement of the movable hinge, and the handle is constructed to be operable to rotate the locking block from the locked position to the released position to allow the movable hinge to pivot to the horizontal position.

Description

Technical Field

[0001] The present invention relates to the technical field of containers, and in particular to a hinge device and a foldable container having the hinge device. Background Art

[0002] In the current foldable containers, the foldable end frame is hinged to the base frame through a hinge device. After the end frame is erected, the pin of the hinge device needs to be manually operated to lock the end frame. The hinge device generally includes a movable hinge fixed to the lower end of the end frame and a fixed hinge fixed to both sides of the end of the base frame. The movable hinge is hinged to the fixed hinge through a pin shaft, so that the end frame of the container can be flipped between a folded position folded on the base frame and an open position along the vertical direction. When the end frame of the container is in the open position, the operator inserts the pin from the inside of the fixed hinge to the outside into the corresponding holes or notches of the movable hinge and the fixed hinge, so that the movable hinge is fixed to the fixed hinge, so that the end frame cannot be flipped from the open position to the folded position under the action of external force. When the end frame of the container needs to be flipped from the open position to the folded position, the operator needs to pull out the pin in advance.

[0003] In addition, in current foldable containers, the pivot axis (e.g., the flip pin) of the hinge device is far away from the end frame of the container, so that the end frame of the container can stand in the open position to facilitate the operator to operate the latch without the need for other operators to hold the end frame. However, in some cases, the operator may forget to lock the latch to the correct position, and since the latch is in the outer contour plane of the box body in both the open and locked states, it is difficult for the operator to find it. If the latch of the hinge device is not locked to the correct position, when the operator operates the foldable container, there will be a great safety hazard to the on-site personnel, the box body, the cargo, and the equipment for operating the box body.

[0004] In order to solve the above problems, a patent application with publication number CN110406820A discloses a hinge device. Although the hinge device can solve the above problems, it still has the following shortcomings: (1) In order to ensure the tight locking between the movable hinge and the fixed hinge, when locking, the gap between the locking block and the fixed hinge and the movable hinge is small. In order to ensure that the locking block can operate smoothly when the bracket pin is turned, the locking block needs to be movably clamped on the bracket. While turning around the bracket pin, the locking block can also turn around itself; however, in order to realize the movement of the locking mechanism to the fixed hinge, the locking block needs to be movably clamped on the bracket. In the release position, the locking mechanism is provided with a pull ring, which is directly pivoted on the lock block. When the pull ring is manually pulled up for operation, the lock block will not be able to flip around itself, and the lock block will be stuck. Then, the opening operation of the lock block will be greatly affected or even impossible to operate; (2) The bracket includes a side plate and an end plate connected to the side plate. The contact surface of the side plate and the end plate with the lock block is an arc-shaped surface protruding outward, thereby realizing the movable clamping between the lock block and the bracket, which is equivalent to the lock block accommodating groove being processed by the bracket and the end plate. The processing cost and difficulty are high, and there are many processes.

[0005] Therefore, it is necessary to provide a hinge device and a foldable container having the same to at least partially solve the above problems. Summary of the invention

[0006] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0007] In order to at least partially solve the above problems, according to a first aspect of the present invention, a hinge device is disclosed, comprising:

[0008] Fixed hinge;

[0009] a living hinge pivotably connected to the fixed hinge between a horizontal position and a vertical position;

[0010] A locking mechanism pivotally connected to the fixed hinge between a locked position and a released position, the locking mechanism comprising:

[0011] a bracket pivotally connected to the fixed hinge;

[0012] a handle connected to the bracket; and

[0013] A locking block, the locking block can be movably clamped on the bracket;

[0014] wherein, during the process of the movable hinge pivoting from the horizontal position to the vertical position, the movable hinge is capable of pushing the locking block located at the locking position, so that the movable hinge located at the vertical position is at least partially below the locking block located at the locking position;

[0015] During the process of the living hinge pivoting from the vertical position to the horizontal position, the locking block blocks the movement of the living hinge, and the handle is configured to be operable to rotate the locking block from the locking position to a releasing position to allow the living hinge to pivot to the horizontal position.

[0016] According to the hinge device of the present invention, by providing a locking mechanism, the movable hinge can be automatically locked in the vertical position when the movable hinge is pivoted to the vertical position, which is easy to operate, reduces damage to the hinge device, and reduces the maintenance cost of the product. In addition, by directly connecting the handle to the bracket instead of the locking block, the movement of the locking block is not restricted. The locking mechanism can be moved from the locking position to the releasing position by operating the handle, thereby enabling the movable hinge to be moved from the vertical position to the horizontal position.

[0017] Optionally, the movable hinge is provided with a protrusion, which has a support surface. When the movable hinge is pivoted from the horizontal position to the vertical position, the protrusion can abut against the locking block and push the locking block away from the locking position. When the movable hinge is in the vertical position, the support surface is arranged on the lower side of the locking block and abuts against the locking block.

[0018] Optionally, a locking surface is provided at the outer end of the fixed hinge, and when the movable hinge is in the vertical position, the locking block can be clamped between the locking surface and the supporting surface along the vertical direction.

[0019] Optionally, the fixed hinge includes a pair of wall panels arranged vertically, the movable hinge and the bracket are arranged between the pair of wall panels, one of the wall panels is provided with an operating hole, the handle extends through the operating hole, and can move along the operating hole.

[0020] Optionally, the fixed hinge further comprises a clamping block, which is arranged at the outer ends of the pair of wall panels and installed to the pair of wall panels in the transverse direction, and the locking surface is the lower surface of the clamping block.

[0021] Optionally, the bracket includes a pair of side panels arranged vertically and a connecting piece connecting the pair of side panels, the pair of side panels are arranged between the pair of wall panels and on both sides of the movable hinge, and the handle is arranged on one of the side panels.

[0022] Optionally, the locking mechanism further comprises a bracket pin, the pair of side panels are pivotally mounted to the pair of wall panels via the bracket pin, and the operating hole is constructed as an arc-shaped through hole extending around the center line of the bracket pin.

[0023] Optionally, the pair of side plates are provided with a receiving groove, the locking block can be movably clamped in the receiving groove, and the connecting piece is provided at the outer end of the locking block.

[0024] Optionally, the upper area of ​​the inner surface of the accommodating groove is constructed as an outwardly protruding arc surface, which is relatively arranged on both sides of the locking block and contacts the locking block, so that the locking block can flip around the bracket pin and also flip around itself.

[0025] Optionally, the lower area of ​​the inner surface of the accommodating groove close to the outer end is constructed as an arc-shaped transition surface, and the locking block is provided with an avoidance notch at a position corresponding to the transition surface, and the portion of the locking block located between the pair of side plates is not provided with an avoidance notch.

[0026] Optionally, a blocking member is provided on the outer end surface of the locking block, and the blocking member is provided on the lower side of the connecting member to prevent the locking block from escaping upward from the accommodating groove.

[0027] According to a second aspect of the present invention, a foldable container is disclosed, comprising a base frame and an end frame, wherein a hinge device according to any one of the above-mentioned first aspect is arranged between the base frame and the end frame, the movable hinge is fixedly connected to the end frame, and the fixed hinge is fixedly connected to the base frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The following drawings of the embodiments of the present invention are used as part of the present invention for understanding the present invention. The embodiments of the present invention and their description are shown in the drawings to explain the principles of the present invention. In the drawings,

[0029] Figure 1 is a perspective schematic diagram of a hinge device of a foldable container according to a first preferred embodiment of the present invention, wherein the movable hinge is located in a vertical position, and the locking mechanism is located in a locked position;

[0030] Figure 2 for Figure 1 A three-dimensional schematic diagram of a hinge device in which the movable hinge is in a horizontal position and the locking mechanism is in a locked position;

[0031] Figure 3 for Figure 1 A perspective schematic diagram of a hinge device in which the hinge device is located at a position between the vertical position and the horizontal position, and the locking mechanism is located in a released position;

[0032] Figure 4 for Figure 1 A three-dimensional schematic diagram of a fixed hinge of a hinge device in FIG.

[0033] Figure 5 for Figure 1 A three-dimensional example diagram of a movable hinge of a hinge device in FIG.

[0034] Figure 6 for Figure 1 An exploded schematic diagram of the locking mechanism in FIG.

[0035] Figure 7 for Figure 6 A three-dimensional schematic diagram of a locking block of a locking mechanism in FIG.

[0036] Description of reference numerals:

[0037] 100: hinge device 110: fixed hinge

[0038] 111: Wall panel 112: Card block

[0039] 113: Locking surface 114: Operation hole

[0040] 115: External pin shaft hole 116: Bottom angle piece

[0041] 117: Angle connection 118: Wall plate pin hole

[0042] 120: movable hinge 121: protrusion

[0043] 122: Support surface 123: Inner pin shaft hole

[0044] 124: abutment surface 130: pivot axis

[0045] 140: Locking mechanism 141: Bracket

[0046] 142: handle 143: lock block

[0047] 144: bracket pin 145: side plate

[0048] 146: Connector 147: Receiving groove

[0049] 148: arc surface 149: transition surface

[0050] 151: blocking member 152: avoiding gap

[0051] 153: Side plate pin hole DETAILED DESCRIPTION

[0052] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the embodiments of the present invention, some technical features well known in the art are not described.

[0053] In order to fully understand the embodiments of the present invention, a detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art.

[0054] The present invention provides a hinge device 100 and a foldable container having the same. The foldable container mainly comprises a base frame (not shown) arranged in a horizontal direction and end frames (not shown) arranged at both ends of the base frame, and the end frames can move between a folded position folded on the base frame and an open position perpendicular to the base frame. The hinge device 100 is used to pivotally connect the end frames to the base frame. The base frame is roughly constructed as a rectangular frame structure, and the hinge device 100 is arranged on both sides of the end of the base frame and at both ends of the end frames.

[0055] The following will be combined Figures 1 to 7 The hinge device 100 according to the present invention will be described in detail.

[0056] like Figures 1 to 3 As shown, the hinge device 100 mainly includes a fixed hinge 110, a movable hinge 120, a pivot shaft 130 and a locking mechanism 140. The fixed hinge 110 is fixedly connected to a base frame (not shown), and the movable hinge 120 is fixedly connected to an end frame (not shown). The pivot shaft 130 can pivotally connect the fixed hinge 110 and the movable hinge 120, so that the movable hinge 120 can move between a horizontal position and a vertical position. The locking mechanism 140 can lock the movable hinge 120 in a locked position (see FIG. 1 ). Figure 1 ) and is pivotally connected to the fixed hinge 110 between a release position for releasing the movable hinge 120.

[0057] It should be noted that, in this article, the "horizontal position" of the movable hinge 120 corresponds to the "folded position" of the end frame, and the "vertical position" of the movable hinge 120 corresponds to the "opened position" of the end frame. That is, when the movable hinge 120 is in the horizontal position, the movable hinge 120 is generally arranged in the horizontal direction, and when the movable hinge 120 is in the vertical position, the movable hinge 120 is generally arranged in the vertical direction.

[0058] The pivot shaft 130 may be substantially configured as a circular columnar structure. One end of the movable hinge 120 is disposed inside the fixed hinge 110. Figure 4 and Figure 5As shown, the movable hinge 120 may be provided with an inner pin shaft hole 123 , the fixed hinge 110 may be provided with an outer pin shaft hole 115 , and the pivot shaft 130 extends through the inner pin shaft hole 123 and the outer pin shaft hole 115 to pivotally connect the movable hinge 120 to the fixed hinge 110 .

[0059] When the locking mechanism 140 is in the locked position (see Figure 1 ), the position of the movable hinge 120 is locked, so that the end frame is locked in the open position. When the locking mechanism 140 is in the release position, the position of the movable hinge 120 can be unlocked, so that the end frame can be pivoted from the open position to the folded position. Figure 6 As shown, the locking mechanism 140 mainly includes a bracket 141, a handle 142, a locking block 143 and a bracket pin 144. The bracket 141 is pivotally connected to the fixed hinge 110 through the bracket pin 144 (see Figures 1 to 3 ), can fully utilize the structure of the existing hinge device, no need to add an additional pivot fixing structure, simple structure, low cost. The handle 142 is connected to the bracket 141. The locking block 143 is roughly constructed as a rectangular parallelepiped structure, and can be movably clamped on the bracket 141.

[0060] In this embodiment, during the process of the movable hinge 120 pivoting from the horizontal position to the vertical position, the movable hinge 120 can push the locking block 143 located at the locking position and push the locking block 143 away from the locking position. When the movable hinge 120 is in the vertical position, the locking block 143 can automatically return to the locking position under the action of gravity, so that the movable hinge 120 located in the vertical position is at least partially below the locking block 143 located in the locking position, and the locking block 143 is clamped between the movable hinge 120 and the fixed hinge 110, and the locking block 143 can always remain in the locking position without external force. During the process of the movable hinge 120 pivoting from the vertical position to the horizontal position, the locking block 143 blocks the movement of the movable hinge 120, and the handle 142 is configured to be operable to rotate the locking mechanism from the locking position to the release position to allow the movable hinge 120 to pivot to the horizontal position. Thus, by providing the locking mechanism 140 , the living hinge 120 can be automatically locked in the vertical position when the living hinge 120 is pivoted to the vertical position.

[0061] Specifically, when the end frame is pivoted from the folded position to the open position, the movable hinge 120 pivots from the horizontal position to the vertical position as the end frame pivots, and can push the locking block 143 located at the locking position to push the locking block 143 away from the locking position, so that when the end frame is in the open position, the locking block 143 is clamped between the movable hinge 120 and the fixed hinge 110 to position the locking mechanism 140 in the locking position, thereby locking the end frame in the open position. As a result, the locking mechanism 140 can automatically lock the end frame in the open position when the end frame pivots to the open position without the operator manually locking it, effectively avoiding safety hazards, reducing damage to the hinge device 100 caused by misoperation, and reducing the maintenance cost of the product.

[0062] like Figure 5 As shown, the movable hinge 120 is provided with a protrusion 121. The protrusion 121 is provided at the outer end of the movable hinge 120, and the protrusion 121 may include an upward supporting surface 122. It should be noted that the directional terms "outside" and "upper" herein are used as a reference when the movable hinge 120 is in a vertical position. When the movable hinge 120 is pivoted from a horizontal position to a vertical position, the protrusion 121 can abut against the locking block 143 and apply a thrust to the locking block 143, so that the locking block 143 moves outward and leaves the locking position. When the movable hinge 120 is in a vertical position, the supporting surface 122 is provided on the lower side of the locking block 143 and can abut against the locking block 143, so that the locking block 143 can be clamped between the supporting surface 122 of the protrusion 121 and the fixed hinge 110 in the vertical direction.

[0063] The protrusion 121 may also be provided with a butt surface 124. The support surface 122 is arranged obliquely relative to the butt surface 124. In this embodiment, when the movable hinge 120 is in a vertical position, the butt surface 124 is arranged obliquely upward toward the outer end of the hinge device 100. When the movable hinge 120 is in the process of pivoting from a horizontal position to a vertical position, the butt surface 124 can butt against the locking block 143 and push the locking block 143 away from the locking position.

[0064] like Figures 1 to 3As shown, the fixed hinge 110 mainly includes a pair of wall panels 111 arranged in the vertical direction and a block 112 arranged between the pair of wall panels 111. The pair of wall panels 111 are arranged in parallel, and the block 112 is arranged at the outer ends of the pair of wall panels 111 and is installed to the pair of wall panels 111 in the horizontal direction. The outer pin shaft hole 115 is correspondingly arranged on the one wall panel 111 and is at the bottom of the inner end of the wall panel 111. The block 112 is provided with a locking surface 113, which is the lower surface of the block 112. When the movable hinge 120 is in the vertical position, the locking block 143 can be clamped between the locking surface 113 and the supporting surface 122 in the vertical direction. In this embodiment, the movable hinge 120 and the bracket 141 are arranged between the pair of wall panels 111, one of the wall panels 111 is provided with an operating hole 114, and the handle 142 extends through the operating hole 114 and can move along the operating hole 114.

[0065] The fixed hinge 110 may further include a bottom corner piece 116 disposed at the lower portion of the wall panel 111 and a connecting corner piece 117 disposed at the upper portion of the wall panel 111 , wherein the bottom corner piece 116 and the connecting corner piece 117 are both disposed at the outer end of the wall panel.

[0066] like Figure 6 As shown, the bracket 141 includes a pair of side plates 145 arranged in the vertical direction and a connecting member 146 connecting the pair of side plates 145. The pair of side plates 145 are arranged in parallel, the pair of side plates 145 are arranged between a pair of wall plates 111 and arranged on both sides of the movable hinge 120, the connecting member 146 is arranged between the pair of side plates 145 in the transverse direction, and the handle 142 is arranged on one of the side plates 145. If the handle 142 is arranged on the side plate 145 close to the outer end surface of the hinge device 100, the handle 142 can be operated on the outer side of the hinge device 100, the operating space is large, and the operating force arm is long for easy operation. If the handle 142 is arranged on the side plate 145 away from the outer end surface of the hinge device 100, the open space at the inner end of the hinge device 100 of the existing folding container can be fully utilized, and the operator can stand at the end of the hinge device 100 to operate the handle 142, the operating space is large, and it is safer, and the operating force arm is long for easy operation.

[0067] The pair of side panels 145 are pivotally mounted to the pair of wall panels 111 (see Figures 1 to 3 The operation hole 114 is constructed as an arc-shaped through hole extending around the center line of the bracket pin 144. The bottom of the side plate 145 is provided with a side plate pin hole 153, and the pair of wall plates 111 of the fixed hinge 110 are correspondingly provided with a wall plate pin hole 118 (see Figure 4). The bracket pin 144 extends through the side plate pin hole 153 and the wall plate pin hole 118 to pivot the bracket 141 to the fixed hinge 110. In this embodiment, the bracket pin 144 is arranged at the bottom of the outer end of the bracket 141, specifically at the bottom of the outer end of the wall plate 111, so that the center of gravity of the locking mechanism 140 is located on the side of the vertical plane where the axis of the bracket pin 144 is located close to the pivot axis 130, so that the locking mechanism 140 can automatically return to the locked position under the action of its own gravity.

[0068] Continue to refer to Figure 6 The pair of side plates 145 are provided with a receiving groove 147, the locking block 143 can be movably clamped in the receiving groove 147, and the connecting piece 146 is arranged at the outer end of the locking block 143. In this embodiment, the receiving groove 147 is entirely arranged on the side plate 145, so the processing of the receiving groove 147 can be realized only by annular cutting and blanking, which is simpler to process, low in cost, and better in precision control. The upper area of ​​the inner surface of the receiving groove 147 is constructed as an arc surface 148 protruding outward, and the arc surface 148 is relatively arranged on both sides of the locking block 143 and contacts the locking block 143, thereby reducing the contact area between the receiving groove 147 and the locking block 143, and ensuring that the locking block 143 can be turned around the bracket pin 144 while also turning around itself, thereby realizing the conversion operation of the locking mechanism 140 between the release position and the locking position.

[0069] The lower area of ​​the inner surface of the receiving groove 147 is configured as an arc-shaped transition surface 149, which can be arranged on one side close to the outer end of the side plate 145. The position of the lock block 143 corresponding to the transition surface 149 is provided with an avoidance notch 152, and the portion of the lock block 143 between the pair of side plates 145 is not provided with an avoidance notch. Therefore, the avoidance notch 152 is arranged on both sides of the outer end of the lock block 143, so that the lock block 143 can rotate in the receiving groove 147 with the arc-shaped surface 148 as a fulcrum, and the side plate 145 can play a role in lateral limiting the lock block 143. The transition surface 149 can be a rounded corner or a diagonal corner.

[0070] The outer end surface of the locking block 143 is provided with a blocking member 151 . The blocking member 151 is provided at the lower side of the connecting member 146 and can abut against the connecting member 146 to prevent the locking block 143 from escaping upward from the receiving groove 147 .

[0071] According to the hinge device of the present invention, by providing a locking mechanism, the movable hinge can be automatically locked in the vertical position when the movable hinge is pivoted to the vertical position, which is easy to operate, reduces damage to the hinge device, and reduces the maintenance cost of the product. In addition, by directly connecting the handle to the bracket instead of the locking block, the movement of the locking block is not restricted, and the locking mechanism can be moved from the locking position to the releasing position by operating the handle, so that the movable hinge can be moved from the vertical position to the horizontal position.

[0072] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "setting" and the like appearing in this article can mean that one component is directly attached to another component, or that one component is attached to another component through an intermediate. Features described in this article in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0073] The present invention has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and illustration, and are not intended to limit the present invention to the described embodiments. It can be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of the protection claimed by the present invention.

Claims

1. A hinge device for a foldable container, characterized in that: include: Fixed hinge; a living hinge pivotably connected to the fixed hinge between a horizontal position and a vertical position; A locking mechanism pivotally connected to the fixed hinge between a locked position and a released position, the locking mechanism comprising: a bracket pivotally connected to the fixed hinge; a handle connected to the bracket; and A locking block, the locking block can be movably clamped on the bracket; wherein, during the process of the movable hinge pivoting from the horizontal position to the vertical position, the movable hinge is capable of pushing the locking block located at the locking position, so that the movable hinge located at the vertical position is at least partially below the locking block located at the locking position; During the process of the living hinge pivoting from the vertical position to the horizontal position, the locking block blocks the movement of the living hinge, and the handle is configured to be operable to move the locking mechanism from the locking position to the releasing position to allow the living hinge to pivot to the horizontal position. The fixed hinge comprises a pair of wall panels arranged vertically, the movable hinge and the bracket are arranged between the pair of wall panels, one of the wall panels is provided with an operating hole, the handle extends through the operating hole and can move along the operating hole, The bracket includes a pair of side panels arranged vertically and a connecting piece connecting the pair of side panels, the pair of side panels are arranged between the pair of wall panels and on both sides of the movable hinge, and the handle is arranged on the side panel away from the outer end surface of the hinge device so that the handle can be operated on the outside of the hinge device.

2. The hinge device according to claim 1, characterized in that: The movable hinge is provided with a protrusion, which has a supporting surface. When the movable hinge is pivoted from the horizontal position to the vertical position, the protrusion can abut against the locking block and push the locking block away from the locking position. When the movable hinge is in the vertical position, the supporting surface is provided on the lower side of the locking block and abuts against the locking block.

3. The hinge device according to claim 2, characterized in that: The outer end of the fixed hinge is provided with a locking surface, and when the movable hinge is in the vertical position, the locking block can be clamped between the locking surface and the supporting surface along the vertical direction.

4. The hinge device according to claim 3, characterized in that: The fixed hinge further comprises a clamping block, which is arranged at the outer ends of the pair of wall panels and is installed to the pair of wall panels in a transverse direction, and the locking surface is the lower surface of the clamping block.

5. The hinge device according to claim 4, characterized in that: The locking mechanism further comprises a bracket pin shaft, through which the pair of side panels are pivotally mounted to the pair of wall panels, and the operating hole is constructed as an arc-shaped through hole extending around the center line of the bracket pin shaft.

6. The hinge device according to claim 5, characterized in that: The pair of side plates are provided with receiving grooves, the locking block can be movably clamped in the receiving grooves, and the connecting piece is arranged at the outer end of the locking block.

7. The hinge device according to claim 6, characterized in that: The upper area of ​​the inner surface of the accommodating groove is constructed as an outwardly protruding arc surface, which is relatively arranged on both sides of the locking block and contacts the locking block, so that the locking block can flip around the bracket pin and also around itself.

8. The hinge device according to claim 6, characterized in that: The lower area of ​​the inner surface of the accommodating groove close to the outer end is constructed as an arc-shaped transition surface, and the locking block is provided with an avoidance notch at the position corresponding to the transition surface, and the portion of the locking block located between the pair of side plates is not provided with an avoidance notch.

9. The hinge device according to claim 6, characterized in that: The outer end surface of the locking block is provided with a blocking member, and the blocking member is arranged on the lower side of the connecting member to prevent the locking block from escaping upward from the accommodating groove.

10. A foldable container, comprising a base frame and an end frame, characterized in that: A hinge device according to any one of claims 1 to 9 is arranged between the base frame and the end frame, the movable hinge is fixedly connected to the end frame, and the fixed hinge is fixedly connected to the base frame.

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