A lightweight packaging box

Abstract

This invention relates to the field of transport packaging technology, comprising a lower cover and an upper cover, the lower cover and the upper cover constituting the main body of the packaging box. The invention is characterized by a sealing ring being fitted at the connection between the top surface of the lower cover and the bottom surface of the upper cover, and several locking buckles being provided on the outer periphery of the lower cover. This invention achieves adaptive active clamping and fixing of the goods during the closing process by symmetrically arranging a positioning ring and a product fixing ring at the bottom of the lower cover, and by providing a pair of supporting wedges at the bottom of the positioning ring that slide in cooperation with a pair of guide wedges fixed to the top surface of the lower cover. When goods are pressed onto the positioning ring, the supporting wedges are pushed open and move upward along the wedge-shaped surface of the guide wedges, thereby driving the positioning ring to lift the goods upward. Simultaneously, a pad at the top of the upper cover presses down from above.

Description

Technical Field

[0001] This invention relates to the field of transport packaging technology, and more particularly to a lightweight packaging box. Background Technology

[0002] Packaging boxes, as basic load-bearing devices in logistics transportation and product storage, are widely used in the turnover and transportation of various fields such as industrial manufacturing, electronic products, instruments and meters, and military products.

[0003] Currently, most common packaging boxes adopt a top and bottom lid fitting structure, and the box is closed by a lock or bolt. The inside of the box is lined with cushioning materials such as foam padding, elastic filler or airbags to limit and protect the goods. Some packaging boxes also have fixed brackets or slots at the bottom of the box, which, together with the top pressure block, clamp and fix the goods.

[0004] However, the existing packaging boxes mentioned above still have significant shortcomings in actual use. First, the internal fixing structure is mostly passive cushioning, which relies on the deformation of the filling material to absorb energy. It lacks an active clamping mechanism that adapts to the size of the goods. When there is a gap between the goods and the box or the height of the goods is inconsistent, the fixing effect is greatly reduced, and the goods are prone to shifting or tipping during transportation, resulting in product damage. In addition, the use of solid wood frames to limit the packaging boxes results in a large overall weight. Summary of the Invention

[0005] Therefore, the purpose of this invention is to provide a lightweight packaging box to solve the technical problems of existing packaging boxes that do not securely fix goods, lack adaptive active clamping function, and have poor bottom cushioning performance.

[0006] To achieve the above objectives, the present invention provides the following technical solution: comprising a lower cover and an upper cover, the lower cover and the upper cover constituting the main body of a packaging box; characterized in that a sealing ring is fitted at the connection between the top surface of the lower cover and the bottom surface of the upper cover; a plurality of latches are provided on the outer periphery of the lower cover, which securely connect the lower cover and the upper cover; a pair of positioning rings are symmetrically provided on the inner bottom of the lower cover, and a product fixing ring is provided on the top of the positioning rings, which limit and fix the goods; a reinforcing structure that cooperates with the positioning rings is provided on the inner bottom of the lower cover.

[0007] The invention is further configured such that the reinforcing structure includes a pair of guide wedges, the guide wedges are fixedly disposed on the top surface of the lower cover, and a pair of support wedges are provided at the bottom of the positioning ring. The support wedges are movably disposed between the pair of guide wedges. When the goods are pressed on the positioning ring, they push the support wedges open and move to both sides, causing the support wedges to move along the wedge-shaped surface of the guide wedges, thereby driving the positioning ring to move upward. The inner top of the upper cover is provided with a pad that cooperates with the goods. Through the cooperation of the pad and the upward movement structure of the positioning ring, the goods are tightly fixed. A guide groove is provided on the side of the support wedges and the guide wedges that are close to each other. A plurality of guide balls are provided in the guide groove. The support wedges move smoothly along the wedge-shaped surface of the guide wedges through the guide balls.

[0008] The present invention is further configured such that a limiting plate is provided at the top of the guide wedge to cooperate with the support wedge, thereby preventing the support wedge from being excessively squeezed out.

[0009] The present invention is further configured such that a support spring is provided at the bottom of the lower cover and at the bottom of the positioning ring, and the positioning ring is supported by the support spring.

[0010] The invention is further configured such that the inner wall of the lower cover is provided with a receiving groove for the support wedge that is squeezed out to both sides, and a reset spring is provided in the receiving groove to assist the support wedge in resetting.

[0011] The invention is further configured such that the lower cover and the upper cover are provided with a plurality of handles, which facilitate the movement of the entire packaging box.

[0012] The present invention is further configured such that a plurality of the latches are spaced apart along the outer periphery of the lower cover.

[0013] The present invention is further configured such that the product fixing ring is fixedly disposed on the top of the positioning ring, and the goods pass through the product fixing ring to achieve radial limiting.

[0014] The present invention is further configured such that the sealing ring is engaged at the connection between the bottom surface of the lower cover and the top surface of the upper cover to achieve sealing of the main body of the packaging box.

[0015] The present invention is further configured such that the pad is fixedly disposed on the inner top of the upper cover, and the position of the pad corresponds to the position of the positioning ring, for pressing the goods from above.

[0016] The beneficial effects of this invention are: By symmetrically setting positioning rings and product fixing rings at the bottom of the lower cover, and setting a pair of support wedges at the bottom of the positioning rings to slide with a pair of guide wedges fixed to the top surface of the lower cover, when the goods are pressed on the positioning rings, the support wedges are pushed open and move up along the wedge-shaped surface of the guide wedges, thereby driving the positioning rings to lift the goods upwards. At the same time, the pads at the top of the upper cover press down from above, realizing adaptive active clamping and fixing of the goods during the closing process. It is made of polyethylene plastic material through rotational molding, and the overall structure weighs 40kg. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the lower cover of the present invention; Figure 3 This is a schematic diagram of a partial internal structure of the present invention. Figure 4 This is a cross-sectional view of the internal structure of the present invention; Figure 5 This is a schematic diagram of the reinforcement structure of the present invention; Figure 6 This is a schematic diagram of the upper cover structure of the present invention.

[0018] Reference numerals in the attached diagram: 1. Lower cover; 2. Upper cover; 3. Lock; 4. Product fixing ring; 5. Handle; 6. Sealing ring; 7. Positioning ring; 8. Support wedge; 9. Guide wedge; 10. Guide groove; 11. Limiting plate; 12. Guide ball; 13. Support spring; 14. Pad; 15. Return spring; 16. Receiving groove. Detailed Implementation

[0019] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0020] A lightweight packaging box, such as Figure 1-4As shown, the package includes a lower cover 1 and an upper cover 2, which together constitute the main structure of the packaging box. The cross-sectional shape of the lower cover 1 and the upper cover 2 can be rectangular, circular, or other suitable geometric shapes, preferably rectangular, to facilitate stacking and transportation. Both the lower cover 1 and the upper cover 2 can be made of polyethylene plastic material through rotational molding to achieve overall lightweighting of the packaging box while ensuring structural strength. The lower cover 1 has a bottom surface and side walls extending upwards around the bottom surface, thus forming an upward-opening receiving space; the upper cover 2 has a top surface and side walls extending downwards around the top surface, thus forming a downward-opening cover. A sealing ring 6 is fitted at the connection between the bottom surface of the lower cover 1 and the top surface of the upper cover 2. This sealing ring 6 is used to ensure the airtightness of the packaging box body when closed. Specifically, the sealing ring 6 can be an elastic seal with a circular, rectangular, O-ring, or lip-shaped cross-section, preferably made of oil-resistant and aging-resistant rubber materials, such as silicone rubber, nitrile rubber, fluororubber, or EPDM rubber. In actual installation, a ring-shaped sealing groove can be made on the top upper edge of the lower cover 1, and the sealing ring 6 can be embedded in the sealing groove with a partial protrusion outside the groove. When the upper cover 2 is closed with the lower cover 1, the lower bottom edge of the upper cover 2 presses against the protruding part of the sealing ring 6, and the sealing between the lower cover 1 and the upper cover 2 is achieved through the elastic deformation of the sealing ring 6. Of course, the sealing groove can also be made on the lower top edge of the upper cover 2, and the sealing ring 6 can be correspondingly snapped onto the upper cover 2, as long as the sealing at the connection between the lower cover 1 and the upper cover 2 can be achieved.

[0021] The lower cover 1 has several latches 3 on its outer periphery. The latches 3 are located on the outer side wall of the lower cover 1 and are distributed at intervals along the outer periphery of the lower cover 1. The number of latches 3 can be two, four, six or more, preferably two or three on each side of the lower cover 1 to ensure uniform distribution of locking force. The specific structure of the latches 3 can adopt locking components commonly used in the prior art, such as latch locks, spring locks, rotary locks or quick clamps. As an example, the latches 3 may include a lock seat fixedly installed on the outer side wall of the lower cover 1, a latch ring pivotally connected to the lock seat, and a latch tongue pivotally connected to the latch ring. The outer side wall of the upper cover 2 has a corresponding lock hook or lock groove. In use, the latch ring is flipped upward so that the latch tongue engages with the lock hook or lock groove of the upper cover 2, and then the latch ring is pressed down and locked to securely connect the upper cover 2 and the lower cover 1. In actual use, by operating these latches 3, the lower cover 1 and the upper cover 2 are fastened together, thereby ensuring that the packaging box will not be accidentally opened during transportation, and at the same time, the sealing ring 6 can maintain sufficient compression to ensure the sealing effect.

[0022] A pair of positioning rings 7 are symmetrically arranged on the inner bottom of the lower cover 1. The positioning rings 7 are generally circular or rectangular rings with a central through-hole for the lower end of goods, such as cylindrical or cylindrical products, to pass through. The positions of the pair of positioning rings 7 can be set according to the actual quantity and layout of the goods being carried. For example, when the packaging box is used to hold a single item, the pair of positioning rings 7 can be set at two different positions on the bottom of the item; when the packaging box is used to hold two items, the two positioning rings 7 can be set corresponding to the two items respectively. The positioning rings 7 are preferably made of engineering plastics or metals with a certain degree of rigidity and toughness, such as nylon, polyoxymethylene, or stainless steel. A product fixing ring 4 is provided on the top of the positioning rings 7. The product fixing ring 4 can be integrally formed with the positioning rings 7 and fixed to the top of the positioning rings 7, or it can be fixed to the top of the positioning rings 7 by bolt connection, snap connection, or adhesive bonding. The shape of the product fixing ring 4 is preferably a ring structure that matches the shape of the goods, with its inner diameter slightly larger than the outer diameter of the corresponding part of the goods, so that the goods can pass through the product fixing ring 4. In a preferred embodiment, the product retaining ring 4 is made of a material with a certain elasticity and coefficient of friction, such as polyurethane rubber or silicone. Its inner ring may have several raised anti-slip ribs or corrugated structures to increase the friction with the surface of the goods. Through the combined action of the product retaining ring 4 and the positioning ring 7, the goods are limited and fixed. That is, the product retaining ring 4 mainly limits the radial movement of the goods to prevent horizontal displacement, while the positioning ring 7 provides axial support and positioning for the goods.

[0023] Furthermore, the inner bottom of the lower cover 1 is provided with a reinforcing structure that cooperates with the positioning ring 7. Specifically, as shown in the figure... Figure 5As shown, the reinforcing structure includes a pair of guide wedges 9, which are fixedly mounted on the inner bottom surface of the lower cover 1. That is, the inner side of the bottom wall of the lower cover 1 is the surface used to support the goods. The guide wedges 9 are generally wedge-shaped blocks with an inclined surface that extends upwards and outwards from the bottom of the lower cover 1. The guide wedges 9 can be fixed to the inner bottom surface of the lower cover 1 by integral molding, bolting, welding, or snap-fitting. A pair of support wedges 8 are provided on the bottom surface of the positioning ring 7. The number of support wedges 8 corresponds to the number of guide wedges 9, with each positioning ring 7 corresponding to a pair of support wedges 8. The support wedges 8 are also wedge-shaped blocks with a mating inclined surface that engages with the inclined surface of the guide wedges 9. The support wedge 8 is movably disposed between a pair of guide wedges 9. Specifically, the two support wedges 8 at the bottom of each positioning ring 7 are located inside the two guide wedges 9, on opposite sides of each other. The mating inclined surfaces of the support wedges 8 are opposite to and slidably contacting the inclined surfaces of the guide wedges 9. The support wedges 8 can be integrally formed with the positioning ring 7, fixedly connected to the positioning ring 7 via a connector, or detachably connected via a slot and block mating structure for easy maintenance and replacement. In actual use, when goods are placed on top of the positioning ring 7, the weight of the goods presses down on the positioning ring 7. After the positioning ring 7 is subjected to downward pressure, it pushes the support wedge 8 at its bottom to move downward. Since the inclined surface of the support wedge 8 is in contact with the inclined surface of the guide wedge 9, the support wedge 8 is guided by the inclined surface of the guide wedge 9 while moving downward, thereby pushing the support wedge 8 to both sides, that is, in the horizontal direction, away from the center of the positioning ring 7. The support wedge 8 moves along the wedge-shaped surface of the guide wedge 9, that is, the inclined surface. Due to the inclination of the wedge-shaped surface, the support wedge 8 climbs upward along the inclined surface, thereby making the entire positioning ring 7 move upward relative to the inner bottom of the lower cover 1, that is, the positioning ring 7 is lifted.

[0024] Meanwhile, reference Figure 6 The inner top of the cover 2 is equipped with a pad 14 that mates with the goods. The pad 14 is fixedly installed on the inner top wall of the cover 2, and its position corresponds to the position of the positioning ring 7. When the cover 2 is closed, the pad 14 presses against the top of the goods from above. As the positioning ring 7 rises due to the weight of the goods, the goods are lifted upward by the positioning ring 7, thus forming a clamping effect on the goods from both above and below with the pad 14 on the inner top of the cover 2. That is to say, when the cover 2 is closed and locked by the latch 3, the cover 2 applies a downward closing force, which presses down on the goods through the pad 14. The goods then transmit the pressure to the positioning ring 7. The support wedge 8 at the bottom of the positioning ring 7 moves further upward along the wedge-shaped surface of the guide wedge 9, so that the positioning ring 7 generates an upward reaction force on the goods, thus forming a self-locking clamping effect and achieving a tight fixation of the goods.

[0025] To facilitate smoother movement of the support wedge 8 along the wedge-shaped surface of the guide wedge 9, a guide groove 10 is provided on the side of the support wedge 8 and the guide wedge 9 closest to each other. Specifically, the guide groove 10 can be an elongated groove extending along the wedge-shaped surface, such as a V-groove, U-groove, or arc-shaped groove. A plurality of guide balls 12 are provided within the guide groove 10. The guide balls 12 can be spheres made of steel balls, ceramic balls, or other high-hardness, wear-resistant materials. The guide balls 12 are rolled within the guide groove 10, with a portion of each ball protruding from the opening of the guide groove 10. The guide balls 12 can be arranged at a certain spacing within the guide groove 10, or they can fill the guide groove 10 and contact each other. In a preferred embodiment, the opening of the guide groove 10 can be provided with a tapering structure to prevent the guide balls 12 from falling out of the guide groove 10, while allowing a portion of the surface of the guide balls 12 to be exposed for contact with the mating surface. By setting the guide ball 12, when the support wedge 8 moves along the wedge-shaped surface of the guide wedge 9, the relative motion between the support wedge 8 and the guide wedge 9 changes from sliding friction to rolling friction. This allows the support wedge 8 to move smoothly along the wedge-shaped surface of the guide wedge 9 under the action of the guide ball 12, which greatly reduces frictional resistance and wear, and improves the sensitivity and service life of the mechanism.

[0026] Based on the above structure, the top of the guide wedge 9 is provided with a limiting plate 11 that cooperates with the support wedge 8. The limiting plate 11 can be a flange or baffle extending horizontally from the top of the guide wedge 9 inward, i.e., towards the support wedge 8. The limiting plate 11 can be integrally formed with the guide wedge 9, or it can be fixedly connected to the top of the guide wedge 9 by screws or welding. The lower surface of the limiting plate 11 is opposite to the upper surface of the top of the support wedge 8. When the support wedge 8 moves upward along the wedge-shaped surface of the guide wedge 9 to a certain height, the top of the support wedge 8 will abut against the lower surface of the limiting plate 11. Thus, the limiting plate 11 restricts the movement stroke of the support wedge 8, preventing the support wedge 8 from excessively climbing upward along the wedge-shaped surface under excessive weight or impact and being squeezed out of the mating area between the guide wedge 9 and the support wedge 8. This ensures that the support wedge 8 always remains within the effective guiding range of the guide wedge 9, guaranteeing the reliability and safety of the structure.

[0027] Furthermore, a support spring 13 is provided at the bottom of the lower cover 1 and at the bottom of the positioning ring 7 to support the positioning ring 7. Specifically, the support spring 13 can be a helical compression spring, with its lower end fixedly connected to the inner bottom surface of the lower cover 1 and its upper end fixedly connected to the bottom outer surface of the positioning ring 7. There can be one or more support springs 13, preferably multiple springs evenly distributed around the circumference of the positioning ring 7 to provide stable support force. When no goods are placed on the positioning ring 7, the support spring 13 is in a naturally extended state or a slightly compressed state, and the positioning ring 7 is held at a certain height position under the support of the support spring 13. When goods are placed on the positioning ring 7, the weight of the goods compresses the support spring 13, the positioning ring 7 moves downward, and then drives the support wedge 8 to move downward and outward along the wedge-shaped surface of the guide wedge 9. When the upper cover 2 is closed, the pad 14 presses the goods downward, and the goods press the positioning ring 7 downward, and the support spring 13 is further compressed and stores elastic potential energy. The support spring 13 serves two purposes: firstly, it provides pre-support and limits the positioning ring 7, preventing it from shaking or tilting when no goods are placed on it; secondly, during transportation, when the packaging box is subjected to impact loads from the bottom, the support spring 13 can absorb and buffer the impact energy through its own elastic deformation, thus playing a role in vibration reduction and buffering, and protecting the goods from impact damage.

[0028] Furthermore, the inner wall of the lower cover 1 has a receiving groove 16 that accommodates the support wedges 8 that are pushed outwards to both sides. A return spring 15 is installed in the receiving groove 16 to assist the support wedges 8 in resetting. Specifically, the receiving groove 16 is formed on the inner wall of the lower cover 1, and its position corresponds to the direction in which the support wedges 8 move outwards. The receiving groove 16 can be a recessed hole or cavity formed by recessing outwards from the inner wall of the lower cover 1. The return spring 15 can be a helical compression spring, with one end fixedly connected to the bottom of the receiving groove 16, i.e., inside the inner wall of the lower cover 1, and the other end fixedly connected to or abutting against the outer end face of the support wedges 8. When the goods are placed on the positioning ring 7, the support wedge 8 is pushed open and moved to both sides. The outer end of the support wedge 8 compresses the return spring 15, causing the return spring 15 to store elastic potential energy. When the goods are removed and the top cover 2 is opened, the support wedge 8 is pushed back to its initial position under the elastic restoring force of the return spring 15, thus achieving automatic reset of the support wedge 8. The return spring 15 works in conjunction with the support spring 13 to ensure accurate positioning of each component of the packaging box in an unloaded state, facilitating the next loading operation.

[0029] In addition, several sets of handles 5 are provided on the lower cover 1 and the upper cover 2, which facilitate the user's movement of the entire packaging box. The handles 5 can be fixedly installed on the outer side wall of the lower cover 1 and the outer side wall of the upper cover 2. The handles 5 can be concave handles, that is, grooves are opened on the outer wall of the lower cover 1 and the upper cover 2, and crossbeams for hand grip are set in the grooves; the handles 5 can also be convex handles, that is, handles are directly provided on the outer wall. Preferably, the handles 5 are foldable or rotatable handles. When not in use, the handles 5 can be fitted against the outer wall of the box to reduce space occupation. When in use, the handles 5 can be flipped out or pulled out. The material of the handles 5 is preferably engineering plastic or metal, and the hand grip can be covered with a non-slip rubber sleeve to improve grip comfort and non-slip performance. The number of handles 5 can be two, four or more sets, preferably two sets on each of the two opposite side walls, to facilitate two or four users to lift at the same time.

[0030] The working principle of this invention will be explained below with reference to a complete usage process. In the initial state, the support spring 13 supports the positioning ring 7 at a certain height, the support wedge 8 is located at the bottom of the wedge-shaped surface of the guide wedge 9, and the return spring 15 is in a naturally extended or slightly compressed state. The operator inserts the goods to be packaged, such as a cylindrical or tubular product, from above the positioning ring 7, so that the lower end of the goods passes through the product fixing ring 4 and the central through hole of the positioning ring 7. Under the action of the goods' own weight, the positioning ring 7 is subjected to downward pressure, which is transmitted to the wedge-shaped surface of the guide wedge 9 through the support wedge 8. The support wedge 8 moves downward and outward along the wedge-shaped surface of the guide wedge 9, while simultaneously compressing the return spring 15. Due to the lifting effect of the wedge-shaped surface, as the support wedge 8 moves outward, the positioning ring 7 moves upward relative to the bottom surface of the lower cover 1 as a whole, and the support spring 13 is compressed. Subsequently, the operator places the upper cover 2 over the lower cover 1, aligning and pressing the pad 14 on the top of the upper cover 2 against the upper surface of the goods. The operator then fastens the latches 3 on the outer periphery of the lower cover 1, securing the upper cover 2 and the lower cover 1 together. Under the locking force of the latches 3, the upper cover 2 presses down on the pad 14, which in turn presses down on the goods. The goods then transmit the downward pressure to the positioning ring 7, causing the support wedge 8 at the bottom of the positioning ring 7 to further rise outward and upward along the wedge-shaped surface of the guide wedge 9 until the top of the support wedge 8 abuts against the lower surface of the limiting plate 11 or reaches a state of force equilibrium. At this point, the goods are firmly clamped under the downward pressure of the pad 14 and the upward reaction force of the positioning ring 7, achieving adaptive active fixation. During transportation, if the packaging box is impacted from the bottom, the support spring 13 absorbs the impact energy through elastic deformation, effectively attenuating the impact load transmitted to the goods. At the same time, the sealing ring 6 maintains the seal between the lower cover 1 and the upper cover 2, preventing moisture and dust from entering the box. When it is necessary to remove the goods, the operator opens the latch 3 and removes the upper cover 2. The downward pressure on the goods is released, and the support wedge 8 moves inward and resets under the elastic restoring force of the return spring 15. At the same time, the support spring 13 pushes the positioning ring 7 upward and resets it. The positioning ring 7 lifts the goods to a certain height, making it easier for the operator to remove the goods.

[0031] Based on the above structure, both the lower cover 1 and the upper cover 2 are double-layered designs, which improves the impact resistance of the device.

[0032] The above embodiments are merely illustrative of the technical solutions of the present invention and are not intended to limit it. Anyone skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A lightweight packaging box, comprising: The lower cover (1) and the upper cover (2) together form the main body of the packaging box. The lower cover (1) and the upper cover (2) are characterized in that a sealing ring (6) is provided at the connection between the top surface of the lower cover (1) and the bottom surface of the upper cover (2). The lower cover (1) is provided with several buckles (3) on its outer periphery, and the lower cover (1) and the upper cover (2) are fastened together by the buckles (3). The bottom of the lower cover (1) is symmetrically provided with a pair of positioning rings (7), and the top of the positioning rings (7) is provided with a product fixing ring (4). The goods are limited and fixed by the product fixing ring (4) and the positioning rings (7). The bottom of the lower cover (1) is provided with a reinforcing structure that cooperates with the positioning ring (7).

2. The lightweight packaging box according to claim 1, wherein: The reinforcement structure includes a pair of guide wedges (9), which are fixedly disposed on the inner bottom surface of the lower cover (1). The bottom of the positioning ring (7) is provided with a pair of support wedges (8), which are movably disposed between the pair of guide wedges (9). When the goods are pressed on the positioning ring (7), the support wedges (8) are pushed open and moved to both sides, so that the support wedges (8) move along the wedge-shaped surface of the guide wedges (9), thereby driving the positioning ring (7) to move upward. The inner top of the cover (2) is provided with a pad (14) that cooperates with the goods. The goods are tightly fixed by the cooperation of the pad (14) and the upward moving structure of the positioning ring (7). The support wedge (8) and the guide wedge (9) are provided with a guide groove (10) on their side that are close to each other. The guide groove (10) is provided with a plurality of guide balls (12). The support wedge (8) moves smoothly along the wedge-shaped surface of the guide wedge (9) through the guide balls (12).

3. The lightweight packaging box according to claim 2, wherein The top of the guide wedge (9) is provided with a limiting plate (11) that cooperates with the support wedge (8), and the limiting plate (11) prevents the support wedge (8) from being over-extended.

4. The lightweight packaging box according to claim 1, wherein The bottom of the lower cover (1) is provided with a support spring (13) at the bottom of the positioning ring (7), and the positioning ring (7) is supported by the support spring (13).

5. The lightweight packaging box according to claim 2, wherein The inner wall of the lower cover (1) is provided with a receiving groove for the support wedge (8) that is squeezed out to both sides. A reset spring (15) is provided in the receiving groove, and the support wedge (8) is reset by means of the reset spring (15).

6. The lightweight packaging box according to claim 1, wherein The lower cover (1) and the upper cover (2) are provided with several sets of handles (5), which facilitate the movement of the entire packaging box.

7. The lightweight packaging box according to claim 1, wherein Several of the latches (3) are spaced apart along the outer periphery of the lower cover (1).

8. The lightweight packaging box according to claim 1, wherein The product fixing ring (4) is fixedly set on the top of the positioning ring (7), and the goods pass through the product fixing ring (4) to achieve radial limiting.

9. The lightweight packaging box according to claim 1, wherein The sealing ring (6) is engaged at the connection between the bottom surface of the lower cover (1) and the top surface of the upper cover (2) to achieve the sealing of the main body of the packaging box.

10. The lightweight packaging box according to claim 2, wherein The pad (14) is fixedly installed on the inner top of the upper cover (2), and the position of the pad (14) corresponds to the position of the positioning ring (7) to press the goods from above.

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