Anti-tamper device for catering packaging bag

Abstract

The utility model relates to a catering packaging bag anti-tamper device which comprises a shell, an opening is formed in the side face of the shell, a rotatable rotating shaft is arranged in the shell, a clamp is arranged in the middle of the rotating shaft, a torsional spring is wound on the lower portion of the rotating shaft, a gear is arranged on the rotating shaft above the torsional spring, and a space for containing a stop device is reserved between the gear and the inner wall of the shell. An insertion hole located at the same height as the gear is formed in the side wall of the shell, a stop device is inserted into the insertion hole, and a first limiting protrusion and a second limiting protrusion which are located at the same height as the gear are arranged on the inner walls, on the two sides of the insertion hole, of the shell respectively. By means of the inserting handle capable of being separated from the inserting hole and the stopping piece, stopping of the gear in different periods is achieved, then the bag opening of the outer packaging bag is contained in the shell in the transportation process, and a third party is prevented from opening the plastic bag. The lunch box is high in safety, the outer packaging bag of the lunch box can be effectively prevented from being opened by a third party, and a consumer can judge whether the lunch box is opened halfway or not by observing the integrity of the outer packaging bag.

Description

Technical Field

[0001] This application relates to an anti-tampering device for food packaging bags. Background Technology

[0002] With the development of the food delivery industry, hygiene has become an increasingly important concern for both businesses and consumers. There have been egregious incidents where, due to conflicts between delivery personnel and consumers, delivery drivers have opened food containers and spat into the food as revenge. There have also been cases where, after delivery drivers have delivered food to designated locations, others have opened the containers and eaten the food because consumers failed to collect it on time. Both of these incidents infringe upon consumers' rights and could potentially damage the reputation of businesses. Therefore, preventing third-party opening of food packaging during the delivery process is a problem that needs to be addressed.

[0003] Currently, in addition to disposable food containers, food-grade plastic bags are often used for food delivery packaging. While some existing technologies have structures in the food containers that prevent them from being reopened after opening, thus preventing third-party tampering, these are costly and therefore not widely adopted. As for the plastic bags, designed for easy opening by consumers, the openings are simply tied manually, which also fails to prevent third-party tampering.

[0004] A search revealed no existing technologies suitable for tamper-proofing devices for plastic bags. Summary of the Invention

[0005] The purpose of this application is to provide a tamper-proof device for food packaging bags that has a good sealing effect, high security, and is easy to use.

[0006] This application is implemented as follows: a tamper-proof device for catering packaging bags includes a housing with an opening on the side of the housing, a rotatable shaft inside the housing, a clamp in the middle of the shaft, a torsion spring wound around the lower part of the shaft, a gear mounted on the shaft above the torsion spring, a space for a stop device to be placed between the gear and the inner wall of the housing, an insertion hole at the same height as the gear on the side wall of the housing, a stop device inserted into the insertion hole, and a first limiting protrusion and a second limiting protrusion at the same height as the gear respectively on the inner walls of the housing on both sides of the insertion hole.

[0007] The stopping device includes a handle and a stop piece connected to the lower end of the handle. A limit block is provided in the middle of the handle, and the stop piece is an elastic piece.

[0008] A cavity guide rail is provided on the inner wall of the housing between the first limiting protrusion and the second limiting protrusion. A guide groove is opened in the middle of the inner side wall of the guide rail, which is consistent with the direction of the guide rail. The guide groove is connected to the cavity inside the guide rail. The stop piece is located outside the guide groove, that is, the stop piece is located between the guide groove and the gear. The middle part of the plug and the limiting block are located inside the guide rail.

[0009] A third limiting protrusion is provided inside the guide rail near the second limiting protrusion. The side of the third limiting protrusion facing the second limiting protrusion is a vertical plane, and the side of the third limiting protrusion facing the first limiting protrusion is a gradually decreasing concave surface. The high end of the concave surface is located on the side of the second limiting protrusion, and the low end is located on the side of the first limiting protrusion. The low end forms a smooth surface at the junction with the guide rail.

[0010] Guide plates are provided at the top and bottom of the opening, and the ends of the guide plates are arc-shaped.

[0011] A turntable that can rotate with the shaft is fitted onto the upper side of the gear.

[0012] By implementing the above technical solution, this application, through the setting of a detachable insert handle and a stopper, achieves the stopping of the gear at different times, thereby enabling the outer packaging bag opening to be retracted into the shell during transportation, preventing third parties from opening the outer packaging bag. This application has a high level of security and can effectively prevent third parties from opening the outer packaging bag of the lunch box. Consumers can determine whether the lunch box has been opened midway by observing the integrity of the outer packaging bag. Attached Figure Description

[0013] The specific structure of this application is given by the following figures and embodiments:

[0014] Figure 1 This is a schematic diagram of the structure of this application;

[0015] Figure 2 This is a schematic diagram of the stop device when it is locked.

[0016] Figure 3 This is a schematic diagram showing the structure when the plug is not pressed down and the corresponding stop device is in the unlocked position.

[0017] Figure 4 This is a schematic diagram of the stop device in the unlocked position;

[0018] Figure 5 This is a schematic diagram showing the structure when the handle is pressed down and the corresponding stop device is in the unlocked position.

[0019] Legend: 1. Housing, 2. Shaft, 3. Clamp, 4. Turntable, 5. Stop plate, 5-1. Insert handle, 5-2. Stop plate, 5-3. Limiting block, 6. Handle, 7. Gear, 8. Torsion spring, 9. Guide plate, 10. Opening, 11. Second limiting protrusion, 12. Guide rail, 12-1. Guide groove, 13. First limiting protrusion, 14. Insertion hole, 15. Third limiting protrusion. Detailed Implementation

[0020] This application is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this application and the actual situation.

[0021] In this utility model, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout determines the orientation; for example, left and right are rows, which are also horizontal, and top and bottom are columns, which are also vertical.

[0022] Example 1: Figure 1-5 As shown, the anti-tampering device for catering packaging bags includes a housing 1, an opening 10 on the side of the housing 1, a rotatable shaft 2 inside the housing, a clamp 3 in the middle of the shaft 2, a torsion spring 8 wound around the lower part of the shaft 2, a gear 7 mounted on the shaft 2 above the torsion spring 8, a space for a stop device to be placed between the gear 7 and the inner wall of the housing 1, an insertion hole 14 at the same height as the gear 7 on the side wall of the housing 1, a stop device inserted into the insertion hole 14, and a first limiting protrusion 13 and a second limiting protrusion 11 at the same height as the gear 7 respectively on the inner wall of the housing 1 on both sides of the insertion hole 14.

[0023] Further, such as Figure 2 , 3 As shown in Figures 4 and 5, the stopping device includes a handle 5-1 and a stop piece 5-2 connected to the lower end of the handle 5-1. A limit block 5-3 is provided in the middle of the handle 5-1, and the stop piece 5-2 is an elastic plate. When the handle 5-1 is inserted into the insertion hole 14, the left end of the stop piece 5-2 is a free end, and the right end is pressed downward by the first limit protrusion 13 and inserted between the teeth of the gear, preventing the gear from rotating counterclockwise. At this time, the rotating shaft 2 can be rotated clockwise, causing the torsion spring 8 to gradually tighten. When the handle 5-1 is pushed inward, causing the handle 5-1 to disengage from the insertion hole 14, the right end of the stop piece 5-2 is a free end, and the left end is pressed downward by the second limit protrusion 11 and inserted between the teeth of the gear, preventing the gear from rotating clockwise. At this time, the torque of the torsion spring 8 can be quickly released.

[0024] Furthermore, a cavity guide rail 12 is provided on the inner wall of the housing 1 between the first limiting protrusion 13 and the second limiting protrusion 11. A guide groove 12-1 with the same orientation as the guide rail 12 is opened in the middle of the inner side wall of the guide rail 12. The guide groove 12-1 communicates with the cavity inside the guide rail 12. The stop piece 5-2 is located outside the guide groove 12-1, that is, the stop piece 5-2 is located between the guide groove 12-1 and the gear 7. The middle part of the insertion handle 5-1 and the limiting block 5-3 are located inside the guide rail 12. When the insertion handle 5-1 is disengaged from the insertion hole 14, the limiting block 5-3 can limit the inward movement distance of the stop piece 5-2, preventing the stop piece 5-2 from getting too close to the gear 7 and making surface contact, which would cause the stop piece 5-2 to cause greater friction damage to the gear 7, and may also prevent the stop piece 5-2 from moving towards the second limiting protrusion 11. When the insert 5-1 is inserted into the socket 14, the limiting block 5-3 can limit the outward movement distance of the stop plate 5-2, preventing the stop plate 5-2 from contacting the inner side of the guide rail 12 too tightly and increasing friction.

[0025] Further, such as Figure 4 As shown, to prevent gear 7 from rotating in the opposite direction by an outsider increasing the external force on shaft 2 after torsion spring 8 releases torque, thereby causing the stop device to move in the opposite direction and the stop device to lose its clockwise blocking effect on gear 7, a third limiting protrusion 15 is provided in the guide rail 12 near the second limiting protrusion 11. There is space between the third limiting protrusion 15 and the guide groove 12-1 for the insertion handle 5-1 to pass through. The side of the third limiting protrusion 15 facing the second limiting protrusion 11 is a vertical plane, and the side of the third limiting protrusion 15 facing the first limiting protrusion 13 is a gradually decreasing concave surface. The high end of the concave surface is located on the side of the second limiting protrusion 11, and the low end is located on the side of the first limiting protrusion 13. The low end forms a smooth surface at the junction with the guide rail 12. When the stop device moves toward the second limiting protrusion 11, the insert 5-1 first moves along the guide rail 12. After moving to the third limiting protrusion 15, the end of the insert 5-1 first moves along the concave surface. After passing the highest point, the insert 5-1 enters between the third limiting protrusion 15 and the second limiting protrusion 11, thereby restricting the insert 5-1 and making it difficult for the gear 7 to reverse under external force. In this case, the distance between the third limiting protrusion 15 and the second limiting protrusion 11 should not be too large; this distance is preferably slightly larger than the width of the insert 5-1.

[0026] Further, such as Figure 1 As shown, to prevent the outer packaging bag from being scratched and damaged during the receiving process, guide plates 9 are provided at the upper and lower ends of the opening, and the ends of the guide plates 9 are arc-shaped.

[0027] Furthermore, to prevent foreign objects from entering between the gear 7 and the housing 1, a turntable 4 that can rotate with the shaft 2 is sleeved on the upper side of the gear 7, and a very small gap is left between the turntable 4 and the inner wall of the housing 1.

[0028] Furthermore, the two ends of the rotating shaft 2 are rotatably connected to the upper and lower end faces of the housing 1, and one end of the rotating shaft 2 extends out of the housing.

[0029] Before use, rotating the shaft 2 gradually tightens the torsion spring 8, putting it in a charged state. During this process, the right end of the stop plate 5-2 is pressed by the first limiting protrusion 13, preventing the gear 7 from rotating counterclockwise. This means that torque can be continuously applied to the torsion spring 8. After the charged state is complete, the open end of the outer packaging bag is placed inside the housing 1 and clamped by the clamp 3. Then, the insert 5-1 is pressed to disengage it from the insertion hole 14, causing the gear 7 to rotate in the opposite direction. During this reverse rotation, the gear 7 continuously applies a force in the same direction to the stop plate 5-2, causing it to move towards the second limiting protrusion 11 until the insert 5-1 enters between the third limiting protrusion 15 and the second limiting protrusion 11. During this process, the gear 7 rotates in the opposite direction due to the torque of the torsion spring 8, thus drawing the opening of the outer packaging bag into the housing 1 and wrapping it around the clamp 3 until the gear 7 stops rotating.

[0030] Finally, the opening of the outer packaging bag is completely retracted into the housing 1. At this point, the left end of the stop plate 5-2 is pressed by the second limiting protrusion 11, which will prevent the gear 7 from rotating clockwise. In other words, the opening of the outer packaging bag cannot detach from the housing 1. Therefore, consumers only need to check the integrity of the outer packaging bag when receiving the goods to determine whether a third party has opened the outer packaging bag during transportation. To remove the lunch box, simply cut open the outer packaging bag.

[0031] Example 2: The structure in Example 1 is suitable for use as a disposable tool. If reuse is required, an operating port (not shown in the figure) is provided on the housing 1 corresponding to the area between the turntable 4 and the gear 7. The operating port allows fingers to be inserted. After the consumer finishes picking up the food, the delivery person can recycle the application, insert their fingers through the operating port to push the stop device inward, so that the plug handle 5-1 is released from the restriction of the third limiting protrusion 15, and then push the stop device towards the plug hole 14. After reaching the plug hole 14, press the stop device outward, so that the plug handle 5-1 is inserted into the plug hole 14, and return to the ready-to-charge state.

[0032] In embodiments 1 and 2, in order to ensure that the plug handle 5-1 will only retract into the guide rail 12 when an external force is applied after it is inserted into the socket 14, at least one groove is provided on the outer wall of the plug handle 5-1, and a protrusion corresponding to the groove is provided in the socket 14.

[0033] The clamp 3 in this application is prior art. For example, a pair of connecting pieces are provided on the upper and lower sides of the rotating shaft 2. The lower connecting piece is provided with staggered clamping heads. An upwardly curved elastic pressure piece is fixedly connected between the upper and lower connecting pieces, and the upper end of another downwardly curved elastic pressure piece is hinged to the upper connecting piece. The lower end of the elastic pressure piece is provided with a locking slot corresponding to the clamping head. Applying pressure to the lower end of the elastic pressure piece causes the locking slot to engage with the clamping head, thereby forming a clamping grip on the opening of the packaging bag between the two elastic pressure pieces. This structure is widely used in folders, hair clips, and other items. The specific structure will not be described in detail here. Of course, the clamp 3 can also be other structures applicable to this application, which will not be described in detail here.

[0034] The above technical features constitute the embodiments of this application, which have strong adaptability and implementation effect. Non-essential technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A tamper-proof device for food packaging bags, comprising a housing with an opening on the side of the housing, characterized in that: A rotatable shaft is provided inside the housing, a clamp is provided in the middle of the shaft, a torsion spring is wound around the lower part of the shaft, a gear is mounted on the shaft above the torsion spring, and a space is left between the gear and the inner wall of the housing to place a stop device. An insertion hole at the same height as the gear is opened on the side wall of the housing, and a stop device is inserted into the insertion hole. A first limiting protrusion and a second limiting protrusion at the same height as the gear are respectively provided on the inner wall of the housing on both sides of the insertion hole.

2. The anti-tampering device for food packaging bags according to claim 1, characterized in that: The stopping device includes a handle and a stop piece connected to the lower end of the handle. A limit block is provided in the middle of the handle, and the stop piece is an elastic piece.

3. The anti-tampering device for food packaging bags according to claim 2, characterized in that: A cavity guide rail is provided on the inner wall of the housing between the first limiting protrusion and the second limiting protrusion. A guide groove is opened in the middle of the inner side wall of the guide rail, which is consistent with the direction of the guide rail. The guide groove is connected to the cavity inside the guide rail. The stop piece is located outside the guide groove, that is, the stop piece is located between the guide groove and the gear. The middle part of the plug and the limiting block are located inside the guide rail.

4. The anti-tampering device for food packaging bags according to claim 3, characterized in that: A third limiting protrusion is provided inside the guide rail near the second limiting protrusion. The side of the third limiting protrusion facing the second limiting protrusion is a vertical plane, and the side of the third limiting protrusion facing the first limiting protrusion is a gradually decreasing concave surface. The high end of the concave surface is located on the side of the second limiting protrusion, and the low end is located on the side of the first limiting protrusion. The low end forms a smooth surface at the junction with the guide rail.

5. The tamper-proof device for food packaging bags according to claim 1, 2, 3, or 4, characterized in that: Guide plates are provided at the top and bottom of the opening, and the ends of the guide plates are arc-shaped.

6. The tamper-proof device for food packaging bags according to claim 1, 2, 3, or 4, characterized in that: A turntable that can rotate with the shaft is fitted onto the upper side of the gear.

7. The tamper-proof device for food packaging bags according to claim 6, characterized in that: An operating port is provided on the housing corresponding to the area between the turntable and the gear.

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