Connecting fastener for improving sealing performance of packaging box

Abstract

The invention relates to the technical field of packaging, in particular to a connecting fastener for improving the sealing performance of a packaging box, which comprises a shell, and a positioning ring is fixedly connected to the side surface of the shell. According to the connecting fastener for improving the sealing performance of the packaging box, a rotating handle is pulled outwards, a shifting rod connected with a nut is driven to compress a second spring, the rotating handle is rotated to enable the shifting rod to enter a clamping block gap through a notch of a first pressure cover, the shifting rod continues to be rotated to drive a threaded rod, a rotating column is promoted to rotate, and an upper plate and a lower plate of a connecting plate are clamped; after sealing operation is completed, a rotating handle is pressed to enable a deflector rod to extrude a third spring, the rotating handle is rotated to enable the deflector rod to enter the side surface of a seat cylinder through a notch of a second pressure cover, a nut is in threaded contact with an external thread lantern ring, threaded connection is achieved, and at the moment, a shell is in press fit with a rubber gasket; the sealing of the connecting fastener is guaranteed, and the risk of damage to the connecting fastener due to external factors is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of packaging, in particular to a connecting fastener for improving the sealing performance of a packaging box. Background Art

[0002] In the field of logistics and cargo packaging, packaging boxes play a vital role. The stability and reliability of their connections directly affect the safety and integrity of the goods. By tightly connecting the various components of the packaging box, the connecting fasteners can limit the swaying space of the goods in the box, reduce the collision and friction between the goods and the inside of the box, and reduce the risk of damage to the goods. Especially for some fragile and vulnerable goods, such as glass products, precision instruments, etc., a stable packaging box connection can provide better protection.

[0003] When a packaging box is loaded with goods, the lid needs to be closed by connecting fasteners to keep the interior airtight to reduce damage to the goods caused by water, dust or other contaminants during transportation. In addition, the connecting parts may be exposed during use and may be damaged or loosened, resulting in poor sealing of the packaging box. Therefore, a connecting fastener is proposed to improve the sealing of the packaging box. Summary of the invention

[0004] The object of the present invention is to provide a connecting fastener for improving the sealing performance of a packaging box, so as to solve the problem proposed in the above background technology that when the packaging box is loaded with goods, the lid needs to be closed by connecting fasteners to keep the interior of the packaging box airtight, and the connecting parts may be exposed and damaged or loosened during use, resulting in poor sealing performance of the packaging box. In order to achieve the above purpose, the present invention provides the following technical solutions: a connecting fastener for improving the sealing performance of a packaging box, comprising an outer shell, a positioning ring is fixedly connected to the side surface of the outer shell, an adjustment component is arranged inside the outer shell, the adjustment component comprises a nut, one end of the nut passes through one side of the outer shell and extends out of the outer shell, one end of the nut extending out of the outer shell is fixedly connected to a turning handle, the nut is threadedly connected to an externally threaded collar, one side of the externally threaded collar is fixedly connected to a clamping block, the inner ring surface of the nut is fixedly connected to a lever, and the outer threaded collar is sleeved inside There is a spring two, a screw is sleeved inside the spring two, one end of the screw is fixedly connected to the inner wall of the external threaded collar, the side surface of the external threaded collar is clamped with a pressure cap one, the pressure cap one is provided with a notch for the block and the lever to pass through, a side surface of a section of the screw is fixedly connected with a seat tube, the screw passes through the seat tube, a spring three is sleeved inside the seat tube, the spring three is sleeved on the side surface of the screw, the side surface of the seat tube is clamped with a pressure cap two, the pressure cap two is provided with a notch for the lever to pass through, and when the lever is not between the pressure cap one and the pressure cap two The pressure cover 1 is in contact with the pressure cover 2, and one section of the screw rod is threadedly connected with a screw sleeve, and the side surface of one section of the screw sleeve is fixedly connected with a rotating column 1, and one end of the rotating column is provided with a hole groove 1, and the side surface of one section of the screw sleeve is clamped with a connecting plate 1, and one side of the connecting plate 1 is fixedly connected with a slide groove 1, and the connecting plate 1 is divided into two upper and lower parts, and the slide groove 1 is provided with two groups, and a rubber gasket is sleeved on the surface of one side of the connecting plate. This kind of connecting fastener that improves the sealing performance of the packaging box pulls the rotating handle outward to drive the lever connected to the nut to compress the spring 2, and the rotating handle is turned to make the lever The rod enters the gap of the block through the first notch of the pressure cover, and the lever is continued to be rotated to drive the screw, causing the rotating column to rotate, so that the upper and lower plates of the connecting plate are clamped, and the rubber rings at the upper and lower interfaces of the packaging box are squeezed to seal the packaging box and prevent water and pollutants from entering. After the sealing operation is completed, the turning handle is pressed to allow the lever to squeeze spring three, and the turning handle is rotated to allow the lever to enter the side surface of the seat tube through the second notch of the pressure cover, so that the nut contacts the thread of the external threaded collar to make the threaded connection. At this time, the outer shell presses the rubber gasket to ensure that the connecting fasteners are sealed and reduce the risk of damage to the connecting fasteners due to external factors.

[0005] Further preferably, the internal thread of the nut is arranged in the middle of the nut, the diameter of the internal thread of the nut is smaller than the diameter of the non-threaded part, the nut is longer than the external threaded ring, and the lever does not contact the thread of the external threaded ring. This connecting fastener that improves the sealing performance of the packaging box, by arranging the nut to be longer than the external threaded ring and the thread is arranged in the middle, the lever connected thereto does not contact the thread of the external threaded ring, so that the nut can move a certain distance and reduce unnecessary wear of the lever on the thread when moving or rotating.

[0006] Further preferably, the hole groove allows the rotating column to rotate through the slide groove, and an auxiliary component is arranged inside the hole groove, and the auxiliary component includes an outer cylinder, the top of the outer cylinder is fixedly connected to the inner wall of the hole groove, and a telescopic rod is movably connected inside the outer cylinder, and the other end of the telescopic rod is fixedly connected to a slider, and a spring is movably sleeved on the surface of one side of the outer cylinder. This kind of connecting fastener improves the sealing performance of the packaging box. When the rotating column rotates, the auxiliary component spring is compressed and exerts a certain force on the slide groove when the upper and lower connecting plates are clamped, thereby further clamping the upper and lower interfaces of the packaging box, and at the same time reducing the impact force of the packaging box on the rotating column due to external force vibration, and avoiding the rotating column and its related connecting parts from loosening, deformation or damage due to frequent external force impact.

[0007] Further preferably, the bottom of the slider in the auxiliary component is hemispherical and made of rubber, the hole groove is convex, the auxiliary component is located at the convex mouth of the hole groove, the hole groove opened by the rotating column is larger than the thickness of the slide groove, the upper end of the hole groove opened by the rotating column is in contact with the slide groove and the lower end does not contact with the slide groove. This kind of connecting fastener improves the sealing performance of the packaging box. The hemispherical slider can reduce the friction resistance with the slide groove during sliding, and relies on the elastic characteristics of the rubber material to buffer the impact force generated by the rotation of the rotating column to a certain extent, thereby reducing the damage caused by rigid collision between components.

[0008] Further preferably, the slide groove is arc-shaped, the arc of the inner slide of the slide groove is greater than that of the outer slide, and a top section of the inner slide of the slide groove is non-arc-shaped. This kind of connecting fastener that improves the sealing of the packaging box, when the slider in the auxiliary component slides in the arc-shaped slide groove, the spring will be gradually compressed and deformed, thereby reducing the risk of excessive stress concentration on the spring due to sudden force, thereby causing damage, ensuring that the elastic properties of the spring are stably maintained, and when the rotating column rotates, it can gradually apply clamping force to the upper and lower interfaces of the packaging box, so that the clamping process is smoother and more uniform, thereby improving the tightness and stability of the connection between the upper and lower interfaces of the packaging box.

[0009] The cam is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs. The second is the same as the slide groove one, and the auxiliary component two is the same as the auxiliary component one. The connecting plate two is connected to the connecting plate one through standard threaded parts. This connecting fastener that improves the sealing performance of the packaging box is provided by setting the connecting plate two, the rotating column two and the slide groove two on the sealing side of the packaging box. The rotating column rotates and reaches the middle section of the slide groove two, so that the upper and lower connecting plates two are clamped, and the upper and lower interfaces of the packaging box are clamped, and the rubber ring on the sealing edge of the packaging box is compressed to keep the packaging box sealed, which is beneficial to prevent water and pollutants from entering the interior of the packaging box. At the same time, the auxiliary component spring is compressed to exert a certain force on the slide groove two, which further clamps the upper and lower interfaces of the packaging box and reduces the impact force of the packaging box on the rotating column two due to external force vibration.

[0010] Further preferably, the second connecting plate is arranged on the inner side of the packaging box, and the first connecting plate is arranged on the outer side of the packaging box. A threaded section of the screw is larger than the thickness of the packaging box. This connecting fastener for improving the sealing of the packaging box can synergistically act on the interface of the packaging box from two directions to enhance the stability and sealing of the connection.

[0011] The lock is then engaged with the locking nut and the locking nut, and the locking nut is engaged with the locking nut and the locking nut, and the locking nut is engaged with the locking nut and the locking nut, and the locking nut is engaged with the locking nut, and the locking nut is engaged with the locking nut, and the locking nut is engaged with the locking nut, and the locking nut is engaged with the locking nut, and the locking nut is engaged with the locking nut, and the locking nut is engaged with the locking nut, and the locking nut is engaged with the locking nut, and the locking nut is engaged with the locking nut, and the locking nut is engaged with the locking nut, and the locking nut is engaged with the locking nut, and the locking nut is engaged with the locking nut, and the locking nut is engaged with the locking nut, and the locking nut is engaged with the locking nut, and the locking nut is engaged with the locking nut, and the locking nut is engaged with the locking nut, and the locking nut is engaged with the locking nut, and the locking nut is engaged with the locking nut, and the locking nut is engaged with the locking nut, and the locking nut is engaged with the locking nut, and the locking nut is engaged with the locking nut, and the locking nut is engaged with the locking nut,

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] In the present invention, by pulling the turning handle outward, the lever connected to the nut is driven to compress the spring 2, and the turning handle is rotated to make the lever enter the gap of the block through the notch of the pressure cover, and the turning handle is continued to be rotated to drive the screw to cause the rotating column to rotate, so that the upper and lower plates of the connecting plate are clamped, and the rubber rings at the upper and lower interfaces of the packaging box are squeezed to achieve the packaging box sealing and prevent water and pollutants from entering. After the sealing operation is completed, the turning handle is pressed to let the lever squeeze the spring 3, and the turning handle is rotated to make the lever enter the side surface of the seat tube through the notch of the pressure cover, so that the nut is in contact with the thread of the external threaded collar, so as to make the threaded connection. At this time, the outer shell presses the rubber gasket to ensure that the connecting fastener is sealed and reduce the risk of damage to the connecting fastener due to external factors.

[0014] In the present invention, the interface parts of the packaging box can be coordinated from two directions to enhance the stability and sealing of the connection. When the outer shell rotates and moves toward the packaging box body, the positioning ring rotates and moves synchronously. When the outer shell is about to be tightened, the positioning ring will touch the limit assembly and compress the spring. When the clamping hole rotates to above the limit assembly, the top cover is ejected by the elastic force of the spring and is stuck in the clamping hole. The outer shell is limited to prevent the outer shell from being disturbed by other external forces and accidentally rotating, thereby improving the stability and reliability of the connecting fasteners during the sealing process of the packaging box. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 The local structure of the present invention is shown in FIG. Figure 1 ;

[0017] Figure 3 It is a partial left-side structural schematic diagram of the present invention;

[0018] Figure 4 This is an enlarged structural schematic diagram of location A of the present invention;

[0019] Figure 5 The local explosion structure of the present invention is schematically shown Figure 1 ;

[0020] Figure 6 The local structure of the present invention is shown in FIG. Figure 2 ;

[0021] Figure 7 The local explosion structure of the present invention is schematically shown Figure 2 ;

[0022] Figure 8 The local explosion structure of the present invention is schematically shown Figure 3 ;

[0023] Fig. 9 The local structure of the present invention is shown in FIG. Figure 3 .

[0024] In the figure: 1, housing; 2, positioning ring; 3, clamping hole; 4, connecting plate 1; 5, rotating column 1; 6, hole groove 1; 7, auxiliary component 1; 8, adjustment component; 9, limit component; 10, ear plate; 11, screw sleeve; 12, rubber gasket; 13, connecting plate 2; 14, rotating column 2; 15, auxiliary component 2; 16, hole groove 2; 17, sleeve; 18, screw; 19, slide groove 1; 20, slide groove 2; 21, handle; 701, outer cylinder 1; 702, telescopic Rod one; 703, slider one; 704, spring one; 801, nut; 802, external threaded collar; 803, block; 804, lever; 805, pressure cover one; 806, spring two; 807, pressure cover two; 808, spring three; 809, seat tube; 901, outer tube two; 902, telescopic rod two; 903, top cover; 904, spring four; 1501, outer tube three; 1502, telescopic rod three; 1503, slider two; 1504, spring five. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-Figure 9The present invention provides a technical solution: a connecting fastener for improving the sealing performance of a packaging box, comprising a shell 1, a positioning ring 2 is fixedly connected to the side surface of the shell 1, an adjusting component 8 is arranged inside the shell 1, the adjusting component 8 comprises a nut 801, one end of the nut 801 passes through one side of the shell 1 and extends out of the shell 1, one end of the nut 801 extending out of the shell 1 is fixedly connected to a handle 21, the nut 801 is threadedly connected to an external threaded collar 802, one side of the external threaded collar 802 is fixedly connected to a clamping block 803, an inner ring surface of the nut 801 is fixedly connected to a lever 804, a spring 2 806 is sleeved inside the external threaded collar 802, a screw 18 is sleeved inside the spring 2 806, one end of the screw 18 is fixedly connected to the inner wall of the external threaded collar 802, a pressure cap 1 805 is clamped on the side surface of the external threaded collar 802, and the pressure cap 1 805 is provided with a clamping block 803 and a lever 804. 4 passes through a gap, a side surface of a section of the screw 18 is fixedly connected with a seat tube 809, the screw 18 passes through the seat tube 809, a spring three 808 is sleeved inside the seat tube 809, the spring three 808 is sleeved on the side surface of the screw 18, the side surface of the seat tube 809 is clamped with a pressure cover two 807, the pressure cover two 807 is provided with a gap for the lever 804 to pass through, the pressure cover one 805 and the pressure cover two 807 are in contact when the lever 804 is not between the pressure cover one 805 and the pressure cover two 807, a section of the screw 18 is threadedly connected with a screw sleeve 11, a side surface of a section of the screw sleeve 11 is fixedly connected with a rotating column one 5, one end of the rotating column one 5 is provided with a hole groove one 6, a side surface of a section of the screw sleeve 11 is clamped with a connecting plate one 4, one side of the connecting plate one 4 is fixedly connected with a slide groove one 19, the connecting plate one 4 is divided into two upper and lower parts, the slide groove one 19 is provided with two groups, and the side surface of the connecting plate one 4 is sleeved with a rubber gasket 12.

[0027] In this embodiment, Figure 6 and Figure 7 As shown, the internal thread of the nut 801 is set in the middle of the nut 801, the diameter of the internal thread of the nut 801 is smaller than the diameter of the non-threaded part, the nut 801 is longer than the external thread ring 802, and the lever 804 does not contact the thread of the external thread ring 802.

[0028] In this embodiment, Figure 2 , Figure 3 , Figure 4 As shown, the hole groove 6 enables the rotating column 5 to rotate through the sliding groove 19, and an auxiliary component 7 is arranged inside the hole groove 6. The auxiliary component 7 includes an outer cylinder 701, the top of the outer cylinder 701 is fixedly connected to the inner wall of the hole groove 6, and a telescopic rod 702 is movably connected inside the outer cylinder 701. The other end of the telescopic rod 702 is fixedly connected to a slider 703, and a spring 704 is movably sleeved on the side surface of the outer cylinder 701.

[0029] In this embodiment, Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the bottom of the slider 703 in the auxiliary component 7 is hemispherical and made of rubber, the hole groove 6 is convex, the auxiliary component 7 is located at the convex mouth of the hole groove 6, the hole groove 6 opened by the rotating column 5 is larger than the thickness of the slide groove 19, the upper end of the hole groove 6 opened by the rotating column 5 is in contact with the slide groove 19 and the lower end does not contact with the slide groove 19.

[0030] In this embodiment, Figure 5 As shown, the slide groove 19 is arc-shaped, the curvature of the inner slideway of the slide groove 19 is greater than that of the outer slideway, and a section of the top of the inner slideway of the slide groove 19 is non-arc-shaped.

[0031] In this embodiment, Figure 2 , Figure 3 , Figure 6 and Fig. 9 As shown, the other end of the screw 18 is threadedly connected with a sleeve 17, a side surface of a section of the sleeve 17 is fixedly connected with a rotating column 14, a side surface of a section of the sleeve 17 is clamped with a connecting plate 13, the connecting plate 13 is divided into two upper and lower parts, one side of the connecting plate 13 is fixedly connected with a slide groove 20, the slide groove 20 is provided with two groups, the rotating column 14 is provided with a hole groove 16, the hole groove 16 is provided with an auxiliary component 15, the auxiliary component 15 includes an outer cylinder 3 1501, the outer cylinder The top of the third 1501 is fixedly connected to the inner wall of the hole groove 2 16, the interior of the outer tube 3 1501 is movably connected with the telescopic rod 3 1502, the other end of the telescopic rod 3 1502 is fixedly connected with the slider 2 1503, the side surface of the outer tube 3 1501 is movably sleeved with a spring 5 1504, the hole groove 2 16 is the same as the hole groove 1 6, the slide groove 20 is the same as the slide groove 1 19, the auxiliary component 2 15 is the same as the auxiliary component 1 7, and the connecting plate 2 13 is connected to the connecting plate 1 4 through standard threaded connections.

[0032] In this embodiment, Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, the second connecting plate 13 is arranged on the inner side of the packaging box, the first connecting plate 4 is arranged on the outer side of the packaging box, and the threaded section of the screw rod 18 is larger than the thickness of the packaging box.

[0033] In this embodiment, Figure 1 , Figure 2 and Figure 8 As shown, the positioning ring 2 is provided with a clamping hole 3, and the side surface of the connecting plate 14 is fixedly connected to the ear plate 10, and a limiting component 9 is arranged on one side of the ear plate 10. The limiting component 9 includes an outer cylinder 2 901, and the bottom of the outer cylinder 2 901 is fixedly connected to one side of the ear plate 10. A spring 4 904 is sleeved inside the outer cylinder 2 901, and a telescopic rod 2 902 is sleeved inside the spring 4 904. The telescopic rod 2 902 is fixedly connected to the inner wall of the outer cylinder 2 901, and the other end of the telescopic rod 2 902 is fixedly connected to a top cover 903.

[0034] The use method and advantages of the present invention: When the connecting fastener for improving the sealing performance of the packaging box is used, the working process is as follows:

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9As shown, the connecting plate 1 4 and the connecting plate 2 13 are respectively fixed on the outer and inner sides of the closed interface of the packaging box. A round hole is opened at the closed interface of the packaging box for the screw 18 to pass through. The connecting fasteners are installed. A sealing ring is provided at the interface of the packaging box. At this time, the packaging box is closed, and the handle 21 is pulled outward to make the lever 804 connected to the nut 801 compress the spring 2 806. At the same time, the handle 21 is rotated to make the lever 804 rotate so that it can pass through the gap of the pressure cover 1 805 and enter between the blocks 803. The lever 804 continues to rotate, so that the screw 18 connected to the inside of the nut 801 is driven to rotate, thereby rotating the rotating column 1 5 Through the slide groove, the upper and lower plates of the connecting plate are gradually clamped, so that the upper and lower interfaces of the packaging box are closed, and the sealing ring at the sealing edge of the packaging box is squeezed to keep the packaging box sealed, preventing water and pollutants from entering the interior of the packaging box. When the rotating column 5 rotates, the spring 704 in the auxiliary component 7 is compressed when the upper and lower connecting plates 4 are clamped, and a certain force is applied to the slide groove 19, so as to further clamp the upper and lower interfaces of the packaging box, and at the same time reduce the impact force of the packaging box on the rotating column 5 due to external force vibration, so as to avoid the rotating column 5 and its related connecting parts from loosening, deformation or damage due to frequent external force impact. 14 and auxiliary component 2 15 rotate synchronously with the above-mentioned rotating column 1 5 and auxiliary component 1 7 to clamp the interface of the packaging box, and then cooperate with the interface of the packaging box from two directions to enhance the stability and sealing of the connection. When the sealing operation of the packaging box is completed, the rotating handle 21 is pressed to make the lever 804 disengage from between the clamping blocks 803, squeeze the spring 3 808, and rotate the rotating handle 21 at the same time, so that one end of the lever 804 enters the side surface of the seat tube 809 through the notch of the pressure cover 2 807 and continues to move a certain distance. At this time, the internal thread of the nut 801 contacts the thread of the external threaded collar 802, and the rotating handle 21 is rotated to make the nut The cap 801 is threadedly connected to the external threaded ring 802. At this time, the shell 1 gradually presses the rubber gasket 12 to keep the connecting fasteners airtight, reduce the damage to the connecting fasteners by water or pollutants, and reduce the damage to the connecting fasteners due to external forces. When the shell 1 is about to be tightened, the positioning ring 2 will touch the limit component 9 and compress the spring four 904. When the clamping hole 3 rotates to above the limit component 9, the top cover 903 is ejected by the elastic force of the spring four 904 and is stuck in the clamping hole 3, limiting the shell 1 to prevent the shell 1 from being accidentally rotated due to interference from other external forces, thereby improving the stability and reliability of the connecting fasteners during the sealing process of the packaging box.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A connecting fastener for improving the sealing performance of a packaging box, comprising a housing (1), characterized in that: A positioning ring (2) is fixedly connected to the side surface of the shell (1); an adjusting assembly (8) is arranged inside the shell (1); the adjusting assembly (8) comprises a nut (801); one end of the nut (801) passes through one side of the shell (1) and extends out of the shell (1); one end of the nut (801) extending out of the shell (1) is fixedly connected to a rotating handle (21); the nut (801) is threadedly connected to an externally threaded collar (802); one side of the externally threaded collar (802) is fixedly connected to a clamping block (803); The inner ring surface of the nut (801) is fixedly connected with a lever (804), the outer threaded ring (802) is sleeved with a second spring (806), the second spring (806) is sleeved with a screw (18), one end of the screw (18) is fixedly connected to the inner wall of the outer threaded ring (802), the side surface of the outer threaded ring (802) is clamped with a pressure cover (805), the pressure cover (805) is provided with a notch for allowing the block (803) and the lever (804) to pass through, and a section of the side surface of the screw (18) is fixedly connected to the inner wall of the outer threaded ring (802). A seat tube (809) is connected, the screw rod (18) passes through the seat tube (809), a spring three (808) is sleeved inside the seat tube (809), the spring three (808) is sleeved on the side surface of the screw rod (18), the side surface of the seat tube (809) is clamped with a pressure cover two (807), the pressure cover two (807) is provided with a notch for the lever (804) to pass through, and when the lever (804) is not between the pressure cover one (805) and the pressure cover two (807), the pressure cover one (805) and the pressure cover two (807) are locked. 07), a section of the screw rod (18) is threadedly connected with a screw sleeve (11), a section of the screw sleeve (11) is fixedly connected with a rotating column (5) on its side surface, a hole groove (6) is opened at one end of the rotating column (5), a section of the screw sleeve (11) is clamped with a connecting plate (4) on its side surface, a side of the connecting plate (4) is fixedly connected with a slide groove (19), the connecting plate (4) is divided into two upper and lower parts, the slide groove (19) is provided with two groups, and a rubber gasket (12) is sleeved on the side surface of the connecting plate (4).

2. A connecting fastener for improving the sealing performance of a packaging box according to claim 1, characterized in that: The internal thread of the nut (801) is arranged in the middle of the nut (801), the diameter of the internal thread of the nut (801) is smaller than the diameter of the non-threaded part, the nut (801) is longer than the external threaded collar (802), and the lever (804) does not contact the thread of the external threaded collar (802).

3. A connecting fastener for improving the sealing performance of a packaging box according to claim 1, characterized in that: The hole groove (6) enables the rotating column (5) to rotate through the sliding groove (19); an auxiliary component (7) is arranged inside the hole groove (6); the auxiliary component (7) includes an outer cylinder (701); the top of the outer cylinder (701) is fixedly connected to the inner wall of the hole groove (6); a telescopic rod (702) is movably connected inside the outer cylinder (701); the other end of the telescopic rod (702) is fixedly connected to a sliding block (703); and a spring (704) is movably sleeved on the side surface of the outer cylinder (701).

4. A connecting fastener for improving the sealing performance of a packaging box according to claim 3, characterized in that: The bottom of the slider (703) in the auxiliary component (7) is hemispherical and made of rubber, the hole groove (6) is convex, the auxiliary component (7) is located at the convex mouth of the hole groove (6), the hole groove (6) opened by the rotating column (5) is larger than the thickness of the slide groove (19), the upper end of the hole groove (6) opened by the rotating column (5) is in contact with the slide groove (19) and the lower end does not contact with the slide groove (19).

5. The connecting fastener for improving the sealing performance of a packaging box according to claim 1, characterized in that: The slide groove 1 (19) is arc-shaped, the curvature of the inner slideway of the slide groove 1 (19) is greater than that of the outer slideway, and a top section of the inner slideway of the slide groove 1 (19) is non-arc-shaped.

6. A connecting fastener for improving the sealing performance of a packaging box according to claim 1, characterized in that: The other end of the screw rod (18) is threadedly connected to a sleeve (17), a side surface of a section of the sleeve (17) is fixedly connected to a rotating column (14), a side surface of a section of the sleeve (17) is clamped with a connecting plate (13), the connecting plate (13) is divided into two upper and lower parts, one side of the connecting plate (13) is fixedly connected to a slide groove (20), the slide groove (20) is provided with two groups, the rotating column (14) is provided with a hole groove (16), an auxiliary component (15) is provided inside the hole groove (16), the auxiliary component (15) includes an outer cylinder (1501), the outer The top of the cylinder three (1501) is fixedly connected to the inner wall of the hole groove two (16), the inner part of the outer cylinder three (1501) is movably connected with a telescopic rod three (1502), the other end of the telescopic rod three (1502) is fixedly connected with a slider two (1503), the side surface of the outer cylinder three (1501) is movably sleeved with a spring five (1504), the hole groove two (16) is the same as the hole groove one (6), the slide groove two (20) is the same as the slide groove one (19), the auxiliary component two (15) is the same as the auxiliary component one (7), and the connecting plate two (13) is connected to the connecting plate one (4) through standard parts threads.

7. A connecting fastener for improving the sealing performance of a packaging box according to claim 6, characterized in that: The second connecting plate (13) is arranged on the inner side of the packaging box, the first connecting plate (4) is arranged on the outer side of the packaging box, and a section of the screw rod (18) having a thread is larger than the thickness of the packaging box.

8. The connecting fastener for improving the sealing performance of a packaging box according to claim 1, characterized in that: The positioning ring (2) is provided with a clamping hole (3); the side surface of the connecting plate (4) is fixedly connected to an ear plate (10); a limiting component (9) is arranged on one side of the ear plate (10); the limiting component (9) comprises an outer cylinder (901); the bottom of the outer cylinder (901) is fixedly connected to one side of the ear plate (10); a spring (904) is sleeved inside the outer cylinder (901); a telescopic rod (902) is sleeved inside the spring (904); the telescopic rod (902) is fixedly connected to the inner wall of the outer cylinder (901); and the other end of the telescopic rod (902) is fixedly connected to a top cover (903).

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