Magnetic type locking device of folding box hinge

Abstract

The utility model relates to the field of folding containers, in particular to a magnetic type locking device of a folding box hinge, which comprises a locking block and a supporting plate, the locking block is arranged on one side face of an inner hinge towards a hinge seat, the locking block comprises a free end portion and a fixed end portion, and the fixed end portion is hinged to the inner hinge. The supporting plate is fixed to the inner side of the vertical plate of the hinge base and comprises a magnetic attraction part, a limiting part and an unlocking part, the magnetic attraction part has attraction force on the locking block, the limiting part is a groove capable of containing the free end, the unlocking part comprises a rotatable push rod, and the push rod is connected with an operation rod located on the outer side of the hinge base; in the pivoting process of the inner hinge, the locking block is attracted to the supporting plate due to the magnetic attraction part, and the free end of the locking block falls into the limiting part, so that the inner hinge is locked; if the inner hinge needs to be unlocked, only the operating rod needs to be manually rotated to drive the push rod to push the locking block until the free end part is separated from the limiting part. The lock block of the inner hinge is attracted to enter the inner side space of the supporting plate through the magnetic attraction part of the supporting plate, meanwhile, the lock block and the inner hinge are automatically locked in cooperation with a special supporting plate structure, the inner hinge can pivot only by pushing the lock block to leave the limiting position of the supporting plate during unlocking, the push rod is convenient to reset, and the unlocking efficiency is improved. Compared with an existing locking device, the working efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of foldable containers, in particular to a magnetic attraction type locking device for a hinge of a foldable container. Background Art

[0002] The containerized multimodal transport mode is currently the most widely used freight mode in the world. When a folding box is used to transport a commercial vehicle, the folding of the front and rear ends is achieved through a hinge device. In the existing commonly used hinge devices, a locking component such as a handle is generally used to lock the inner hinge, and the locking component is equipped with a locking part to lock the handle so that it is fixed. Therefore, when unlocking the inner hinge, it is necessary to first unlock the handle with the locking part, and then unlock the inner hinge with the handle. This unlocking process goes through two steps, which increases the complexity of the entire movement process of the inner hinge.

[0003] Many different solutions of internal hinge self-locking devices have appeared in existing patents to simplify the operation steps of the locking device, but most of the structures are still relatively complex, which increases the difficulty of maintenance. Utility Model Content

[0004] The utility model aims to provide a magnetic locking device for a folding box hinge, optimize the locking structure of the inner hinge, and simplify the locking operation.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a magnetic locking device for a folding box hinge, the folding box hinge comprising an inner hinge and a hinge seat, the inner hinge being pivotally connected to the hinge seat between a folded position and an open position, the magnetic locking device comprising a locking block and a support plate, the locking block being arranged on a side of the inner hinge facing the hinge seat, the locking block comprising a free end and a fixed end, the fixed end being hinged to the inner hinge;

[0006] The support plate is fixed to the inner side of the vertical plate of the hinge seat, and includes a magnetic attraction portion, a limiting portion and an unlocking portion, wherein the magnetic attraction portion has an adsorption force on the locking block, the limiting portion is a groove that can accommodate the free end, and the unlocking portion includes a rotatable push rod, and the push rod is connected to an operating rod located outside the hinge seat;

[0007] During the pivoting process of the inner hinge, the locking block is adsorbed on the support plate by the magnetic attraction portion, and the free end falls into the limiting portion, thereby locking the inner hinge; if the inner hinge needs to be unlocked, it is only necessary to manually rotate the operating lever to drive the push rod to push the locking block until the free end is separated from the limiting portion.

[0008] Preferably, the locking block is in the shape of a flat long strip as a whole, and the two ends of the locking block along the length direction are respectively the free end and the fixed end, the outermost side of the free end is an arc surface, and the outermost side of the fixed end is a semicircular arc surface. The arc surface can make the rotation of the locking block smoother and easier to enter the limiting part.

[0009] Preferably, a rotating shaft is fixed to the side surface of the inner hinge, an annular baffle is fixed to the axial ends of the rotating shaft, and the fixed end is sleeved on the rotating shaft and located between the two annular baffles.

[0010] Preferably, the support plate is in the shape of a flat plate, and the overall cross-section is L-shaped, the limiting portion is located on the short side of the support plate, the unlocking portion and the magnetic portion are located on the long side of the support plate, and the locking block is adsorbed by the magnetic portion and falls into the space enclosed by the long side and the short side of the support plate.

[0011] Preferably, the limiting portion is an arc-shaped groove opened on the short side of the support plate, and the inner wall shape of the arc-shaped groove matches the arc surface of the free end.

[0012] Preferably, the unlocking portion includes a mounting groove opened on the long side of the support plate and the push rod, and the push rod is connected to the mounting groove via an automatic reset structure.

[0013] Preferably, the automatic reset structure includes a transmission rod and a torsion spring sleeved on the transmission rod, the two ends of the transmission rod are respectively fixedly connected to the push rod and the operating rod, the two ends of the torsion spring are respectively fixed to the inner wall of the mounting groove and the push rod, and when the torsion spring is in a natural state, the push rod is hidden in the mounting groove.

[0014] Preferably, the magnetic attraction portion includes a magnetic attraction groove and a magnet that at least fills the magnetic attraction groove, and the magnetic attraction groove is opened on the long side of the support plate.

[0015] Preferably, the thickness of the support plate is greater than the thickness of the locking block to prevent the locking block from colliding with the hinge seat during the pivoting process of the inner hinge.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the utility model attracts the locking block of the inner hinge into the inner space of the pallet through the magnetic attraction part of the pallet, and automatically locks the locking block and the inner hinge with the help of a special pallet structure. When unlocking, it is only necessary to push the locking block away from the limit of the pallet, and the inner hinge can be pivoted, and the push rod can be easily reset, which greatly improves the working efficiency compared with the existing locking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a side view of an embodiment of the utility model;

[0018] Figure 2 It is a structural schematic diagram of an embodiment of the utility model (the side stand is hidden);

[0019] Figure 3 yes Figure 2 A schematic structural diagram of an inner hinge of an embodiment;

[0020] Figure 4 yes Figure 2 A schematic structural diagram of a support plate in an embodiment of the present invention;

[0021] Figure 5 is a side view of the inner hinge of the present embodiment in a pivoted state;

[0022] Figure 6 yes Figure 2 and a side view of the locked state of this embodiment;

[0023] Figure 7 2 is a side view of the unlocked state of this embodiment. DETAILED DESCRIPTION

[0024] See also Figure 1 and Figure 2 The utility model discloses a magnetic locking device for a folding box hinge. The folding box hinge includes an inner hinge 1 and a hinge seat 2. The inner hinge 1 is pivotally connected to the hinge seat 2 between the folding position and the open position. The hinge seat 2 includes a back plate 22 and two vertical plates 21 vertically welded to the top corner pieces of the folding box. The tops of the back plate 22 and the two vertical plates 21 are welded with U-shaped plates, and the bottom is a top corner piece. The two vertical plates 21 are parallel to each other, and the back plate 22 is perpendicular to the vertical plates 21 and welded to the ends of the same side of the two vertical plates 21. The inner hinge 1 is in the shape of a plate, sandwiched between the two vertical plates 21, and pivotally connected to the two vertical plates 21.

[0025] See also Figure 2 The magnetic locking device includes a locking block 3 and a support plate 4. The inner hinge 1 has two side surfaces facing the hinge seat 2, one of which faces the outside of the box body. The locking block 3 is arranged on the side surface, and the support plate 4 is welded to the inner side of the vertical plate 21 opposite to the side surface. Only in this way can the locking block 3 and the support plate 4 cooperate with each other, thereby facilitating the operation of the magnetic locking device.

[0026] The locking block 3 is in the shape of a flat long strip as a whole. Figure 3The two ends of the locking block 3 along the length direction are a free end 31 and a fixed end 32 respectively. The outermost side of the free end 31 is an arc surface, and the outermost side of the fixed end 32 is a semicircular arc surface. The arc surfaces at both ends facilitate the sliding of the locking block 3 during the rotation process. A rotating shaft 5 is welded on the side of the inner hinge 1. The rotating shaft 5 is perpendicular to the inner hinge 1. Both ends of the rotating shaft 5 are welded with annular baffles. The fixed end 32 of the locking block 3 is sleeved on the rotating shaft 5 and is located between the two annular baffles, so that the fixed end 32 is hinged to the inner hinge 1. When no force is applied, the locking block 3 can rotate freely around the rotating shaft 5 on the outer side of the inner hinge 1. When the inner hinge 1 is in the folded position, except for gravity, the locking block 3 is not subjected to other external forces. According to the gravity mechanism, the locking block 3 is in a vertical position as a whole, and the horizontal height of the fixed end 32 is higher than the free end 31.

[0027] The support plate 4 includes a magnetic attraction portion, a limiting portion and an unlocking portion, see Figure 4 In this embodiment, the support plate 4 is in the shape of a flat plate, and the overall cross-section is L-shaped, that is, the support plate 4 has long sides and short sides that are perpendicular to each other. The long side of the support plate 4 is horizontal, and the short side of the support plate 4 is vertical, and the short side is at a higher horizontal height than the long side. At the same time, the space enclosed by the long side and the short side of the support plate 4 is defined as the inner side of the support plate 4. The limiting part is located on the short side of the support plate 4, and the unlocking part and the magnetic part are located on the long side of the support plate 4. The magnetic part attracts the locking block 3 to the inner side of the support plate 4, and locks the locking block 3 through the cooperation of the limiting part. The unlocking part is used to separate the locking block 3 and the limiting part, and release the lock of the locking block 3 and the inner hinge 1.

[0028] The specific structure corresponding to the position limiting part in this embodiment is as follows: a concave arc groove 41 is provided on one side of the short side of the support plate 4 facing the inner side of the support plate 4, and the arc groove 41 can accommodate the free end 31 of the locking block 3. The inner wall shape of the arc groove 41 matches the arc surface of the free end 31, that is, the outer side surface of the free end 31 and the inner wall of the arc groove 41 can slide relative to each other.

[0029] The specific structures corresponding to the magnetic attraction part and the unlocking part in this embodiment are as follows: the side of the long side of the support plate 4 facing the inner side of the support plate 4 is provided with a mounting groove 42 and a magnetic attraction groove in sequence, and the mounting groove 42 is closer to the corner of the support plate 4 than the magnetic attraction groove. The magnetic attraction groove corresponds to the magnetic attraction part, and the interior of the magnetic attraction groove is filled with magnets 43, and the surface of the magnets 43 is flush with the surface of the long side of the support plate 4. When the lock block 3 falls into the inner side of the support plate 4 under the magnetic attraction force, the fixed end 32 of the lock block 3 and at least half of the side part are in direct contact with the magnet 43, and the free end 31 of the lock block 3 just slides into the arc groove 41, so that the lock block 3 can be locked.

[0030] According to the long side structure of the support plate 4, after the locking block 3 falls into the inner side of the support plate 4, there is a part of the side of the locking block 3 that is not in contact with the magnet 43 facing the mounting groove 42, so that the mounting groove 42 corresponds to the unlocking part. The interior of the mounting groove 42 is connected with a push rod 44 through an automatic reset structure, and the automatic reset structure includes a transmission rod 46 and a torsion spring 45 sleeved on the transmission rod 46. The transmission rod 46 is parallel to the inner wall of the mounting groove 42 and hidden in the mounting groove 42. The push rod 44 is connected to the operating rod 6 located outside the hinge seat 2 through the transmission rod 46. The push rod 44, the transmission rod 46 and the operating rod 6 are connected in sequence, that is, the two ends of the transmission rod 46 are welded to the push rod 44 and the operating rod 6 respectively. The push rod 44, the transmission rod 46 and the operating rod 6 are in the same plane, and the push rod 44 and the operating rod 6 are perpendicular to the transmission rod 46. The push rod 44 and the operating rod 6 are also located on both sides of the transmission rod 46. For easy operation, the operating rod 6 needs to be located outside the hinge seat 2, so a small hole for the transmission rod 46 to pass through is opened on the vertical plate 21, and the end of the transmission rod 46 is welded to the operating rod 6 on the outside of the hinge seat 2. The two ends of the torsion spring 45 are respectively fixed to the inner wall of the installation groove 42 and the push rod 44. When the torsion spring 45 is in a natural state, the push rod 44 is parallel to the inner wall of the installation groove 42 and hidden in the installation groove 42. The operating rod 6 is rotated from the outside of the hinge seat 2, and the elastic force of the torsion spring 45 is overcome by manpower, so that the push rod 44 can be rotated synchronously.

[0031] Based on the above magnetic locking device, during the pivoting process of the inner hinge 1 from the folded position to the open position, refer to Figure 5 The locking block 3 rotates to contact the short side of the support plate 4 due to gravity. After the inner hinge 1 is pivoted to the open position, the fixed end 32 of the locking block 3 is at the same level as the arc groove 41. At the same time, due to gravity and the attraction of the magnet 43, the free end 31 of the locking block 3 slides along the arc groove 41 so that the entire locking block 3 completely falls into the inner side of the support plate 4. Figure 6 At this time, the locking block 3 is subjected to gravity as a whole, and the fixed end 32 and part of the side surface are subjected to magnetic attraction, which cooperates with the groove limiting of the free end 31 to achieve locking of the locking block 3, and then achieve locking of the inner hinge 1.

[0032] When the locking block 3 is located inside the support plate 4, the locking block 3 and the inner hinge 1 can be locked by manually rotating the operating rod 6 on the outside of the hinge seat 2: the operating rod 6 is rotated clockwise to drive the push rod 44 to rotate clockwise; during the rotation of the push rod 44, the push rod 44 overcomes the magnetic force and gravity factors and gradually lifts the locking block 3 from the free end 31 of the locking block 3. At this time, the free end 31 slides in the arc groove 41; refer to Figure 7 When the push rod 44 is fully erected and the free end 31 of the locking block 3 completely leaves the arc groove 41, the inner hinge 1 can be pushed to the folded position without hindrance. At the same time, the operating rod 6 can be manually released, and the push rod 44 will automatically reset. The process diagram of the inner hinge 1 pivoting from the open position to the folded position can also be referred to Figure 5 .

[0033] In order to prevent the locking block 3 from colliding with the hinge seat 2 during the pivoting process of the inner hinge 1 , the thickness of the supporting plate 4 is greater than the thickness of the locking block 3 .

[0034] In summary, the utility model attracts the locking block 3 of the inner hinge 1 into the inner space of the support plate 4 through the magnetic attraction part of the support plate 4, and automatically locks the locking block 3 and the inner hinge 1 with the special structure of the support plate 4. When unlocking, it is only necessary to push the locking block 3 away from the limit of the support plate 4, and the inner hinge 1 can be pivoted, and the push rod 44 can be easily reset. Compared with the existing locking devices, the magnetic locking device greatly improves the working efficiency.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A magnetic locking device for a folding box hinge, the folding box hinge comprising an inner hinge (1) and a hinge seat (2), the inner hinge (1) being pivotally connected to the hinge seat (2) between a folded position and an open position, characterized in that: The magnetic locking device comprises a locking block (3) and a support plate (4); the locking block (3) is arranged on a side of the inner hinge (1) facing the hinge seat (2); the locking block (3) comprises a free end (31) and a fixed end (32); the fixed end (32) is hinged to the inner hinge (1); The support plate (4) is fixed to the inner side of the vertical plate (21) of the hinge seat (2), and comprises a magnetic attraction portion, a limiting portion and an unlocking portion, wherein the magnetic attraction portion has an adsorption force on the locking block (3), the limiting portion is a groove capable of accommodating the free end portion (31), and the unlocking portion comprises a rotatable push rod (44), wherein the push rod (44) is connected to an operating rod (6) located outside the hinge seat (2); During the pivoting process of the inner hinge (1), the locking block (3) is attracted to the support plate (4) by the magnetic attraction portion, and the free end portion (31) falls into the limiting portion, thereby locking the inner hinge (1); if the inner hinge (1) needs to be unlocked, it is only necessary to manually rotate the operating rod (6) to drive the push rod (44) to push the locking block (3) until the free end portion (31) is separated from the limiting portion.

2. The magnetic locking device according to claim 1, characterized in that: The locking block (3) is in the shape of a flat long strip as a whole, and the two ends of the locking block (3) along the length direction are respectively the free end portion (31) and the fixed end portion (32), the outermost side of the free end portion (31) is an arc surface, and the outermost side of the fixed end portion (32) is a semicircular arc surface.

3. The magnetic locking device according to claim 2, characterized in that: A rotating shaft (5) is fixed to the side of the inner hinge (1), an annular baffle is fixed to the axial ends of the rotating shaft (5), and the fixed end (32) is sleeved on the rotating shaft (5) and located between the two annular baffles.

4. The magnetic locking device according to claim 2, characterized in that: The support plate (4) is in the shape of a flat plate, and the overall cross-section is L-shaped, the limiting portion is located on the short side of the support plate (4), the unlocking portion and the magnetic attraction portion are located on the long side of the support plate (4), and the locking block (3) falls into the space enclosed by the long side and the short side of the support plate (4) after being attracted by the magnetic attraction portion.

5. The magnetic locking device according to claim 4, characterized in that: The limiting portion is an arc-shaped groove (41) formed on the short side of the support plate (4), and the inner wall shape of the arc-shaped groove (41) matches the arc surface of the free end portion (31).

6. The magnetic locking device according to claim 4, characterized in that: The unlocking portion comprises a mounting groove (42) opened on the long side of the support plate (4) and the push rod (44), and the push rod (44) is connected to the mounting groove (42) via an automatic reset structure.

7. The magnetic locking device according to claim 6, characterized in that: The automatic reset structure comprises a transmission rod (46) and a torsion spring (45) sleeved on the transmission rod (46); two ends of the transmission rod (46) are respectively fixedly connected to the push rod (44) and the operating rod (6); two ends of the torsion spring (45) are respectively fixed to the inner wall of the mounting groove (42) and the push rod (44); when the torsion spring (45) is in a natural state, the push rod (44) is hidden in the mounting groove (42).

8. The magnetic locking device according to claim 4, characterized in that: The magnetic attraction portion comprises a magnetic attraction groove and a magnet (43) that at least fills the magnetic attraction groove, and the magnetic attraction groove is opened on the long side of the support plate (4).

9. The magnetic locking device according to claim 4, characterized in that: The thickness of the support plate (4) is greater than the thickness of the locking block (3).

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