Cutter for opening bag and unsealing

Abstract

The utility model discloses a cutter for opening a bag and a seal, which comprises a shell and a blade, the shell comprises a main body and an auxiliary body, the upper edge of the main body and the lower edge of the auxiliary body are straight lines and are arranged at intervals in parallel, the interval forms a bag opening groove for a bag body to enter, and the blade is embedded into the main body and the auxiliary body. The cutting edge of the blade is arranged in the bag opening groove and faces the inlet direction of the bag opening groove. Through a linear parallel bag opening groove structure formed by the main body and the auxiliary body, a physical guide channel is formed during operation, and it is ensured that a packaging bag enters a cutter action area along a preset track. The cutting edge is arranged towards the inlet direction, so that the cutting action is naturally matched with the advancing direction of the bag body, track deviation caused by material rebound during cutting of a traditional cutter is effectively avoided, and the straightness of a notch is remarkably improved. The operation process of the whole bag opening tool is simple and easy to understand, and a user only needs to hold the tool with one hand to complete the cutting operation of the bag. According to the bag opening device, a conventional HDPE bag or a thick aluminum foil bag can be easily opened through corresponding operation steps, other complex tools are not needed, the bag opening time is greatly saved, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of packaging auxiliary tool technology. Specifically, it relates to a knife for opening bags and seals, which is suitable for quick opening scenarios of various products packaged in HDPE bags or aluminum foil bags, such as food, medical supplies, and daily necessities. Background Technology

[0002] High-density polyethylene (HDPE) bags and aluminum foil composite bags have become the mainstream choice for food, medical supplies, and precision product packaging due to their excellent sealing, moisture-proof, and barrier properties. However, their physical properties present significant opening challenges in practical use: HDPE bags, due to their toughness and elasticity, are prone to irregular tears when torn by hand, especially when containing liquids or powders, which can easily lead to spillage. Cutting with a knife often results in misalignment due to material rebound. Although aluminum foil bags are thin and lightweight, their metal layers have sharp edges. Forcibly tearing them is not only time-consuming and laborious but also easily creates burr-like cuts at the bag opening, posing a risk of scratches.

[0003] Currently, consumers generally rely on tearing by hand or using traditional cutting tools to open bags, but both methods have significant drawbacks. Hand operation significantly damages the integrity of the packaging; uneven cuts and improper force application can lead to structural breakage. Tools like scissors, due to the curved shape of the bag, make it difficult to apply stable force, and the cutting trajectory easily deviates from the preset position. Especially in special environments such as medical emergencies and outdoor scenarios, operational efficiency and safety cannot be guaranteed. Market research indicates that existing bag-opening methods can no longer meet users' core demands for "precise opening and safe control," necessitating the development of a dedicated opening tool that combines cut guidance, stable force application, and safety protection. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a knife for opening bags and seals. By optimizing the blade structure, portability design and safety considerations, it can be used at any time, with lightweight operation and adaptability to multiple scenarios.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A knife for opening and sealing bags includes a housing and a blade. The housing includes a main body and a secondary body. The upper edge of the main body and the lower edge of the secondary body are both straight lines and are spaced apart from each other. The spacing forms an opening groove for the bag to enter. The blade is embedded in the main body and the secondary body. The cutting edge of the blade is located inside the opening groove and is oriented towards the entrance of the opening groove.

[0007] In a preferred embodiment, the angle between the blade edge and the edge of the bag opening groove is an acute angle.

[0008] In a preferred embodiment, the angle between the blade edge and the edge of the bag opening groove is 20°-60°.

[0009] In a preferred embodiment, a flow divider is provided between the main body and the sub-body, and the flow divider is located behind the blade.

[0010] In a preferred embodiment, the front edge of the diversion guide plate is provided with a guide ramp.

[0011] In a preferred embodiment, the outer surface of the diversion guide plate is provided with protruding particles.

[0012] In a preferred embodiment, the main body is provided with a concave circular grip portion, and the surface of the grip portion is provided with anti-slip particles.

[0013] In a preferred embodiment, the inlet of the bag opening groove is provided with a rounded transition section.

[0014] In a preferred embodiment, the width of the opening groove is 1-2 mm.

[0015] After adopting the above technical solution, the opening tool provided by this utility model has the following beneficial effects compared with the prior art:

[0016] 1. This utility model utilizes a linear parallel opening groove structure formed by the main body and the sub-body to create a physical guiding channel during operation, ensuring that the packaging bag enters the blade's action area along a preset trajectory. The blade's orientation towards the inlet direction ensures that the cutting action naturally matches the bag's travel direction, effectively avoiding trajectory deviation caused by material springback during traditional blade cutting, resulting in a significant improvement in cut straightness. The entire bag-opening tool is simple and easy to operate; users only need to hold the tool with one hand to complete the bag cutting operation. Whether it's a regular HDPE bag or a thicker aluminum foil bag, it can be easily opened through the corresponding operating steps without the need for other complex tools, greatly saving opening time and improving work efficiency.

[0017] 2. The diversion guide plate of this utility model not only prevents the blade from being accidentally exposed, but also forms an integral cutting guide structure through the guide ramp. During the cutting process, it can guide the material on both sides of the cut bag to both sides. The raised particles can increase the friction between the material and the bag, further preventing the bag opening from closing crosswise.

[0018] 3. This utility model features a concave grip portion that conforms to the curvature of the palm, combined with anti-slip particles, ensuring that the direction of force application precisely coincides with the axis of action of the blade. The reinforcing rib connection structure ensures that the main body and the sub-body maintain a stable distance under continuous pressure, preventing deformation of the opening groove due to changes in material thickness.

[0019] 4. The rounded corner transition entrance of this utility model reduces the insertion resistance of thin packaging bags, and the sharp-angle blade design adapts to materials with different toughness by adjusting the cutting angle.

[0020] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0021] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0022] Figure 1 This is a front view of a knife for opening bags and seals according to this utility model;

[0023] Figure 2 This is a slanted schematic diagram of a knife used for opening bags and seals according to this utility model.

[0024] In the picture:

[0025] 1. Outer shell;

[0026] 11. Main body;

[0027] 111. Holding part;

[0028] 12. Subsidiary body;

[0029] 2. Blade;

[0030] 3. Open the bag groove;

[0031] 4. Diverter plate.

[0032] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0034] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] like Figure 1 and Figure 2 As shown, this utility model provides a tool for opening and sealing bags, including a shell 1 and a blade 2. The shell 1 includes a main body 11 and a secondary body 12. The upper edge of the main body 11 and the lower edge of the secondary body 12 are both straight lines and are spaced parallel to each other, forming an opening groove 3 for the bag to enter. The blade 2 is embedded in the main body 11 and the secondary body 12, and the cutting edge of the blade 2 is located inside the opening groove 3 and faces the entrance of the opening groove 3. The gap width of the opening groove 3 is precisely designed according to the common HDPE bag thickness range (e.g., 1-2mm), and can only accommodate HDPE bags or aluminum foil bags.

[0038] Preferably, the inlet of the bag opening slot 3 is provided with a rounded corner transition. Specifically, the front end of the bag opening slot 3 adopts a rounded corner outline design, which conforms to the corner shape of common HDPE bags or aluminum foil bags. A smooth rounded corner transition is also provided at the edge of the inlet of the bag opening slot 3. This design can guide the packaging bag smoothly into the tool, reduce the difficulty of placement, and improve the positioning accuracy during operation. This design not only ensures the smooth insertion of the HDPE bag, but also restricts the entry of other objects, preventing accidental contact with the blade 2, greatly improving the safety of use, and effectively avoiding direct contact between the user's body parts and the blade 2 from all angles.

[0039] Preferably, the angle between the cutting edge of blade 2 and the edge of the opening groove 3 is an acute angle. More preferably, the angle between the cutting edge of blade 2 and the edge of the opening groove 3 is 20°-60°. This cutting angle has been verified through extensive experiments and, for HDPE bags and aluminum foil bags, it can minimize cutting resistance while ensuring cutting strength, thus achieving efficient cutting.

[0040] Preferably, a flow divider 4 with a thickness of approximately 1 mm is provided between the main body 11 and the sub-body 12. The flow divider 4 is located behind the blade 2, and its leading edge has a guide ramp. The flow divider 4 is almost tightly fitted with the blade 2, forming an integral cutting guide structure. During the cutting process, it can guide the material on both sides of the cut bag to both sides. The outer surface of the flow divider 4 is provided with raised particles, which can increase the friction between the flow divider 4 and the bag material, further preventing the bag opening from crossing and closing. At the same time, the flow divider 4 can also act as a reinforcing rib. In other words, the connection strength between the main body 11 and the sub-body 12 is improved by the flow divider 4 located behind the blade 2. The flow divider 4 can be integrally formed with the outer shell 1, increasing the overall stability of the cutting tool and preventing breakage.

[0041] Preferably, the rear edge of the flow guide plate 4 is flush with the rear edge of the blade 2 and is enclosed. The design of wrapping the back of the blade 2 can also provide some support and protection for the blade 2 during the cutting process, reduce the shaking of the blade 2 during the cutting process, and improve the stability and accuracy of the cutting.

[0042] Preferably, the main body 11 is provided with a concave circular grip, and the surface of the grip 111 is provided with anti-slip particles to increase hand friction and prevent the tool from slipping during use. The overall design of the shell 1 conforms to ergonomic design, with typical dimensions of 2.5 cm in length and 1.5 cm in width, making it convenient for users to operate with one hand.

[0043] After adopting the above technical solution, the opening tool provided by this utility model has the following beneficial effects compared with the prior art:

[0044] 1. This utility model utilizes a linear parallel opening groove structure formed by the main body and the sub-body to create a physical guiding channel during operation, ensuring that the packaging bag enters the blade's action area along a preset trajectory. The blade's orientation towards the inlet direction ensures that the cutting action naturally matches the bag's travel direction, effectively avoiding trajectory deviation caused by material springback during traditional blade cutting, resulting in a significant improvement in cut straightness. The entire bag-opening tool is simple and easy to operate; users only need to hold the tool with one hand to complete the bag cutting operation. Whether it's a regular HDPE bag or a thicker aluminum foil bag, it can be easily opened through the corresponding operating steps without the need for other complex tools, greatly saving opening time and improving work efficiency.

[0045] 2. The diversion guide plate of this utility model not only prevents the blade from being accidentally exposed, but also forms an integral cutting guide structure through the guide ramp. During the cutting process, it can guide the material on both sides of the cut bag to both sides. The raised particles can increase the friction between the material and the bag, further preventing the bag opening from closing crosswise.

[0046] 3. This utility model features a concave grip portion that conforms to the curvature of the palm, combined with anti-slip particles, ensuring that the direction of force application precisely coincides with the axis of action of the blade. The reinforcing rib connection structure ensures that the main body and the sub-body maintain a stable distance under continuous pressure, preventing deformation of the opening groove due to changes in material thickness.

[0047] 4. The rounded corner transition entrance of this utility model reduces the insertion resistance of thin packaging bags, and the sharp-angle blade design adapts to materials with different toughness by adjusting the cutting angle.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0049] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A knife for opening bags and seals, comprising a housing (1) and a blade (2), characterized in that: The outer shell (1) includes a main body (11) and a secondary body (12). The upper edge of the main body (11) and the lower edge of the secondary body (12) are both straight lines and are spaced apart from each other. The interval forms a bag opening groove (3) for the bag body to enter. The blade (2) is embedded in the main body (11) and the secondary body (12). The cutting edge of the blade (2) is located inside the bag opening groove (3) and is arranged towards the entrance of the bag opening groove (3).

2. The knife for opening bags and seals as described in claim 1, characterized in that: The blade (2) has an acute angle between its cutting edge and the edge of the bag opening groove (3).

3. The knife for opening bags and seals as described in claim 2, characterized in that: The blade (2) has an angle of 20°-60° with the edge of the bag opening groove (3).

4. The knife for opening bags and seals as described in claim 1, characterized in that: A flow divider (4) is provided between the main body (11) and the sub-body (12), and the flow divider (4) is located behind the blade (2).

5. The knife for opening bags and seals as described in claim 4, characterized in that: The front edge of the diversion guide plate (4) is provided with a guide ramp.

6. The knife for opening bags and seals as described in claim 4, characterized in that: The outer surface of the diversion guide plate (4) is provided with protruding particles.

7. The knife for opening bags and seals as described in claim 1, characterized in that: The main body is provided with a concave circular grip (111), and the surface of the grip (111) is provided with anti-slip particles.

8. The knife for opening bags and seals as described in claim 1, characterized in that: The inlet of the bag opening groove (3) is provided with a rounded transition section.

9. The knife for opening bags and seals as described in claim 1, characterized in that: The gap width of the opening groove (3) is 1-2mm.

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