A rod-shaped structure delivery tube

Abstract

The application discloses a rod-shaped structure release pipe, which comprises a first end part, a second end part and a breakable connecting part between the two end parts connected in sequence along an axial direction; at least one of the first end part and the second end part is internally provided with a containing cavity containing biological control insects, attractants, baits, toxic baits or other functional contents; the breakable connecting part is a weak area which can be preferentially broken under the action of manual operation or external mechanical force, so that the rod-shaped structure release pipe is separated and a release opening communicating with the containing cavity is formed to release or expose the contents; the rod-shaped structure release pipe is further provided with a gravity center biasing structure, so that the overall gravity center is axially biased to at least one end. The application is suitable for manual insertion, fixed-point arrangement or cooperation with a release device, can meet the requirements of carrying, storage, transportation, release and release, and is suitable for various contents and various application scenarios.

Description

Technical Field

[0001] This invention relates to the field of biological control and green pest control carrier technology, and more particularly to a rod-shaped delivery tube suitable for carrying, storing, transporting, placing, and releasing contents such as biological control insects, attractants, baits, and poison baits. More specifically, it relates to a rod-shaped carrier that can remain relatively closed when not in use, can form a release opening under manual operation or mechanical action, and can be used for manual placement, fixed-point deployment, or in conjunction with a delivery device. Background Technology

[0002] In the process of green control of agricultural and forestry pests, it is often necessary to place biological control insects, attractants, baits, poison baits, or other functional substances in specific locations to attract, feed on, parasitize, spread, or sustainably control pests. Depending on the target pest and the application scenario, the placement location can be on the field surface, crop plants, tree trunks, tree holes, tunnels, cracks, passages, or other confined spaces. Therefore, different requirements are placed on the structure, opening method, placement method, and environmental adaptability of the carrier.

[0003] In existing technologies, common carriers include bee cards, cardboard boxes, containers with perforations, and spherical or near-spherical release carriers. These carriers are suitable for open areas or specific, single-scenario applications. For example, some spherical or near-spherical bee releasers, with pre-designed bee holes, drainage holes, hooks, or counterweight structures, are used for carrying, suspending, or releasing predatory insects; some Trichogramma bee balls or paper balls have pre-formed release holes, allowing bee eggs or emerging insects to disperse spontaneously after release. Existing solutions have already seen application in specific crop, forest hanging, or drone-deployed scenarios.

[0004] However, the structural design and usage logic of the existing carriers mentioned above typically revolve around pre-set openings, overall deployment, and subsequent dispersal or overflow of contents after insect molting. For applications requiring the main body to remain relatively closed during storage, transportation, or pre-deployment stages, and then creating a release opening manually or mechanically during use, existing solutions still suffer from insufficient adaptability. Especially in scenarios requiring controlled opening timing, reduced premature exposure, improved immediate release capability after deployment, or compatibility with different contents, existing common structures struggle to simultaneously meet both closed storage / transport and on-demand opening requirements.

[0005] On the other hand, existing spherical and near-spherical carriers are mostly suitable for surface placement, hanging, or throwing. For narrow target areas such as tree holes, borer tunnels, cracks, and insect activity channels, these carriers have certain limitations in terms of size, insertion method, and opening position control, making it difficult to simultaneously meet the requirements of "easy insertion," "forming an effective opening," and "releasing or exposing the contents along the target direction." Although existing forest spherical bee release devices can be suspended in the forest environment via hooks, their overall structure is still a spherical structure with pre-existing bee holes, and their primary design purpose is not for insertion or breaking to create new openings.

[0006] Furthermore, different application scenarios have significantly different requirements for the contents of the carrier. Some scenarios require carrying biological control insects, while others require carrying attractants, bait, poison bait, solid particles, powders, or pastes. Some scenarios emphasize continuous exposure or delayed release after deployment, while others emphasize activation upon reaching the target location and immediate effectiveness. Existing technologies are typically designed for a single object or a single usage method, making it difficult to simultaneously accommodate multiple contents, multiple activation methods, and multiple deployment scenarios on the same type of carrier.

[0007] Furthermore, during manual deployment, mobile platform delivery, or aerial delivery, the landing posture, directional stability, and opening orientation of the carrier also affect the release effect of the contents. Some existing solutions use counterweights to make the existing release holes of the spherical carrier face upwards as much as possible to improve the dispersal conditions of insects after emergence; however, the focus of such designs is still on optimizing the landing posture of the carrier with pre-set openings, rather than creating new release openings by breaking the carrier or other external forces during use.

[0008] Therefore, it is still necessary to provide a carrier structure with a wider range of applications, which can carry not only biological control insects, but also functional contents such as attractants, baits, and poison baits; can keep the main body relatively closed when not in use, and can form a release opening through manual or mechanical action when needed; and can be used in various scenarios such as manual placement, fixed-point deployment, and use in conjunction with delivery devices, thereby improving the applicability and application flexibility of the carrier. Summary of the Invention

[0009] The purpose of this invention is to provide a rod-shaped delivery tube to address the shortcomings of existing release carriers or containers in terms of adaptability to narrow channels, control of opening timing, compatibility with different contents, and coordination with manual or mechanical delivery. Specifically, this invention aims to provide a rod-shaped carrier that remains relatively closed when not in use, and can form a release opening through manual operation or mechanical action when needed. This allows it to be used for the storage, transportation, delivery, and release of biological control insects, as well as for carrying and deploying attractants, baits, poison baits, or other functional contents. It is suitable for various application scenarios, including manual placement, fixed-point delivery, and use in conjunction with delivery devices.

[0010] The technical solution to achieve the purpose of this invention is as follows:

[0011] A rod-shaped dispensing tube, comprising:

[0012] A first end, a second end, and a breakable connecting part located between the two ends are connected sequentially along the axial direction;

[0013] At least one of the first end and the second end has an internal cavity for containing contents;

[0014] The breakable connecting part constitutes a weak area that is easily broken relative to the first end and the second end. It can break when subjected to external force, so that the rod-shaped structure delivery tube is broken into at least two segments, wherein at least one segment after breaking forms an opening communicating with the receiving cavity for the release or exposure of the contents.

[0015] The rod-shaped delivery tube is equipped with a center-of-gravity offset structure, which causes the center of gravity of at least one segment formed after the rod-shaped delivery tube breaks to be offset from the middle of the segment along its axial direction and closer to the end of the segment, thereby improving the attitude stability of the delivery tube during drop and landing. This structure allows the tube to remain relatively closed when not in use and to form a release opening when needed, while also improving the attitude stability of the broken segments.

[0016] Furthermore, the outer diameter of the breakable connector is smaller than the outer diameter of the first end and the second end, and / or the wall thickness of the breakable connector is smaller than the wall thickness of the first end and the second end; and / or the breakable connector is provided with one or more of the following: thinning groove, notch, gap, and material weakening area. Through the above-mentioned configuration, the breakable connector can be made easier to break relative to the two ends.

[0017] Furthermore, a flexible connector is provided between the first end and the second end. The flexible connector spans the breakable connecting portion or its adjacent area, ensuring that the segments formed after the breakable connecting portion breaks remain connected and limiting the relative separation distance between the segments. This design prevents the segments from completely separating after breakage.

[0018] Furthermore, the flexible connector is pre-embedded, fixed, or inserted inside the rod-shaped delivery tube; when the rod-shaped delivery tube is not broken, the flexible connector is in a relaxed, retracted, or non-load-bearing state.

[0019] Furthermore, the flexible connector is provided with a limiting structure to prevent the flexible connector from slipping or coming off during breakage, falling, unfolding or being stretched.

[0020] The limiting structure is composed of a limiting ball, a limiting block, a nodule, an enlarged diameter section, a stop block, or a combination thereof, and the size of the limiting structure is larger than the minimum through hole size of the flexible connector insertion part.

[0021] Furthermore, the flexible connector is disposed outside the rod-shaped delivery tube and wrapped around the outer surface of the rod-shaped delivery tube. This configuration creates an external connection structure.

[0022] Furthermore, both ends of the flexible connector are respectively connected to the outer sides of the first end and the second end via fixing points. This configuration achieves a stable connection between the external flexible connector and both ends.

[0023] Furthermore, the flexible connector is a rope-like, strip-like, line-like, or sheet-like flexible component, and is made of fiber materials, polymer materials, or composite materials with flexibility and tensile strength. Through the above configuration, the specific form and material of the flexible connector can be selected according to usage requirements.

[0024] Furthermore, the first end and / or the second end are provided with vent holes and / or sealing structures. The number, diameter, and distribution of the vent holes are set according to the ventilation requirements of the contained contents. The sealing structure is a removable sealing component, a biodegradable sealing film, a limiting cap, or a limiting mesh cover, to prevent the contents from prematurely escaping or leaking when not in use. Through the above settings, the adaptability to different contents can be improved.

[0025] The significant advantages of this invention compared to existing technologies are:

[0026] (1) It takes into account both relatively closed load-bearing capacity and open-ended use as needed.

[0027] This invention utilizes a breakable connecting portion between the first and second ends, which is more easily broken than the two ends. This allows the rod-shaped delivery tube to remain relatively closed when not in use. When needed, the breakable connecting portion is broken preferentially by manual operation or mechanical force, thus forming a release opening communicating with the receiving cavity. Compared to common carriers that rely on pre-set release holes, this invention is more advantageous in controlling the opening timing, reducing the possibility of premature exposure or escape of contents during storage, transportation, or delivery.

[0028] (2) Suitable for insertion layout in narrow channels.

[0029] This invention employs a rod-shaped structure with relatively large ends and a relatively small connecting area in the middle. The breakable connecting part can form an insertion part with a small outer diameter, making it more suitable for insertion into narrow spaces such as tree holes, borer tunnels, cracks, excretion holes, and pest activity channels. Compared with common carriers that are spherical, box-shaped, or have a large overall size, this invention is easier to deploy in a point-like, dispersed, and directional manner.

[0030] (3) Adaptable to various types of contents, improving the versatility of the carrier.

[0031] The first end and / or the second end of the present invention are provided with a receiving cavity, which can accommodate contents such as biological control insects, attractants, bait, poison bait, solid particles, powders, pastes, etc., as needed. Ventilation holes can be selected according to the characteristics of the contents, thereby improving the adaptability of the same carrier to different control targets, different usage methods and different usage scenarios.

[0032] (4) It helps to improve the attitude stability during the deployment and landing process.

[0033] The present invention features a center-of-gravity offset structure, which shifts the overall center of gravity axially to one end. This improves spatial attitude stability during deployment, descent, and landing, and reduces the probability of random rolling after landing, obstruction of the release opening, or unfavorable release direction, thereby enhancing the reliability of content release or exposure.

[0034] (5) It is easy to use in conjunction with manual deployment or mechanical delivery methods.

[0035] This invention can be manually broken by the operator for insertion, deployment, or fixed-point delivery, or it can be used in conjunction with drones or other delivery devices, with a mechanical mechanism applying bending, pulling, or impact forces to the breakable connecting part to create a release opening in the target area to complete the delivery.

[0036] (6) In some implementations, both immediate release and delayed release can be taken into account.

[0037] When the contents contained are those that need to spread, be exposed, or function immediately upon reaching the target area, the breakable connecting part can be broken during deployment to create a release opening for immediate use; when the contents do not need to be released immediately, the appropriate deployment time and opening method can be selected according to actual needs. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the overall structure of the rod-shaped delivery tube in Example 1.

[0039] Figure 2 This is a cross-sectional view of the rod-shaped delivery tube in Example 1.

[0040] Figure 3 This is a structural schematic diagram of the weak area of ​​the breakable connection part in Example 1.

[0041] Figure 4 This is a schematic diagram of the center-of-gravity offset structure of the rod-shaped delivery tube in Example 1.

[0042] Figure 5 This is a schematic diagram of the rod-shaped delivery tube used in Example 1, inserted into a tree hole or borer tunnel.

[0043] Figure 6 This is a schematic diagram of the rod-shaped release tube used for insect release in Example 1.

[0044] Figure 7 This is a schematic diagram of the use of the rod-shaped delivery tube in Example 1 to attract insects to poison bait.

[0045] Figure 8 This is a schematic diagram of the rod-shaped delivery tube used in conjunction with the drone delivery device in Example 1.

[0046] Figure 9 This is a cross-sectional view of the rod-shaped delivery tube in Example 2.

[0047] Figure 10 This is a schematic diagram of the controlled connection state after the rod-shaped delivery tube of Example 2 is broken.

[0048] Figure 11 This is a schematic diagram of the external flexible connector structure of the rod-shaped delivery tube in Example 2.

[0049] Figure 12 This is a schematic diagram illustrating the application of the rod-shaped delivery tube in Example 2 for suspending tree canopies or supports.

[0050] Figure 13 This is a schematic diagram of the unfolded rod-shaped delivery tube of Example 2 after being deployed by a drone and breaking in mid-air.

[0051] Figure 14This is a schematic diagram of Example 2, showing the flexible connector and contents housed in the same cavity.

[0052] Figure 15 This is a cross-sectional schematic diagram of the cavity release structure triggered by the flexible connector in Example 2. Detailed Implementation

[0053] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. However, it should be understood that these embodiments are only used to illustrate the technical solutions of the present invention, and not to limit its scope of protection. Equivalent modifications made by those skilled in the art without departing from the core structure of the present invention should all fall within the scope of protection of the present invention.

[0054] Example 1

[0055] like Figures 1 to 4 As shown, this embodiment provides a rod-shaped delivery tube, which includes a first end 101, a second end 102, and a breakable connecting portion 103 disposed between the first end 101 and the second end 102. At least one of the first end 101 and the second end 102 has a receiving cavity inside for containing insects, bait, poison bait, or other functional contents; the breakable connecting portion 103 connects the two ends and forms a weak area that is more easily broken than the two ends.

[0056] like Figure 2 As shown, the first end 101 and the second end 102 can respectively form cavities that are interconnected or isolated from each other. Depending on different usage requirements, the cavities can contain biological control insects, attractants, bait, poison bait, solid particles, powders, pastes, or liquid contents. The first end 101 and the second end 102 can be configured with the same structure, or they can be configured with asymmetrical structures of different volumes, lengths, or wall thicknesses.

[0057] like Figure 3As shown, the breakable connecting part 103 is a connecting part with a smaller outer diameter of the rod-shaped dispensing tube. Its wall thickness is less than that of the first end 101 and the second end 102. Alternatively, a thinning groove 13 may be provided at this part, including one or more of the following: a notch, a notch, or a material weakening area, so that the breakable connecting part 103 will break preferentially when subjected to bending force, tension, or impact force. After the breakable connecting part 103 breaks, the rod-shaped dispensing tube separates into at least two segments, and at least one segment forms an opening communicating with the corresponding receiving cavity. In some embodiments, ventilation holes 105 may be provided on the first end 101 and / or the second end 102. The number, diameter, and distribution position of the ventilation holes 105 can be adjusted according to the ventilation requirements of the contained contents. In other embodiments, ventilation holes may not be provided when the contained contents do not require ventilation. The rod-shaped dispensing tube may be made of plastic, biodegradable polymer material, pulp molding material, wood flour pressing material, or composite coating material.

[0058] like Figure 4 As shown, the rod-shaped delivery tube is equipped with a center-of-gravity offset structure C. This offset structure C is used to deflect the center of gravity of the first and / or second segments formed after the rod-shaped delivery tube breaks through the breakable connecting part 13 from their respective axial directions and bring them closer to their ends. The center-of-gravity offset structure C can be achieved through differences in end wall thickness, material density, local weighting, cavity volume differences, or combinations thereof. By setting the center-of-gravity offset structure C, the attitude stability of each segment after breakage during delivery, descent, and landing can be improved, reducing the probability of the opening facing downwards, release being obstructed, or rolling after landing, thus affecting the release effect.

[0059] 1. Method of application through tree holes or borer tunnels

[0060] like Figure 5 As shown, when the rod-shaped delivery tube needs to be used to deliver bait into tree holes, borer tunnels, excretion holes, or other narrow passages, the operator can hold the first end 101 and the second end 102 and apply bending force to the breakable connecting part 103, causing it to break along the weakest point. The resulting central opening is located at the end of the broken section, and the outer diameter of the insertion part formed by the breakable connecting part 103 is small, allowing it to be inserted into the target passage. After insertion, insects, poison bait, or other functional contents in the receiving cavity can be released along the passage direction, or allowed for the target insects to enter and feed.

[0061] In this embodiment, the outer diameter of the breakable connecting part 103 can be set according to the target channel size, for example, 1 mm to 3 mm, to accommodate the tunnel structure formed by borers such as longhorn beetles. With the above structure, the delivery tube can achieve point-like, decentralized manual insertion and delivery without additional hanging parts, adhesive attachments, or fixing parts.

[0062] 2. Insect release methods

[0063] like Figure 6 As shown, when the rod-shaped release tube is used for the storage, transportation, and field release of biological control insects, the insects can be placed in the containment cavity of the first end 101 and / or the second end 102, and ventilation holes 105 are provided at the corresponding ends according to the survival requirements of the insects. During storage, transportation, or pre-release stages, the rod-shaped release tube remains unbroken, keeping the insects in the containment cavity in a relatively closed environment. Removable sealing plugs, such as degreased cotton plugs, biodegradable sealing films, limiting caps, or limiting nets, can be provided at the ends to prevent insects from escaping prematurely before use. This reduces the possibility of premature spread before use.

[0064] In use, the operator can apply bending or tensile force to the breakable connector 103 according to the release timing and target location, causing it to break preferentially along the weakest area, thereby forming a release opening communicating with the corresponding receiving cavity at least one end after breakage. Subsequently, at least one broken section can be placed in the target area, allowing the biological control insects in the receiving cavity to diffuse outward through the release opening. Using the above method, the release of biological control insects can be initiated only after they reach the target location, thereby improving the controllability of the release timing.

[0065] In some embodiments, the rod-shaped release tube can be released after the insects have become mobile, and a release opening can be formed by breaking during or immediately after release to achieve immediate diffusion; in other embodiments, the release opening can be formed on the carrier after an appropriate period of time following deployment, depending on the insect's condition, transportation arrangements, or on-site operation requirements.

[0066] In this embodiment, the first end 101 and the second end 102 can respectively accommodate insect individuals, feed or auxiliary materials in the same or different states; when the two ends contain different contents, one end can be opened only, or both ends can be opened respectively, according to actual needs, to meet the needs of phased release or combined use.

[0067] 3. Methods of Poison Baiting

[0068] like Figure 7As shown, when the rod-shaped delivery tube is used for baiting, solid, powdered, or paste-like bait can be filled into the receiving cavity of the first end 101 and / or the second end 102; in some embodiments, liquid bait can also be contained. The ends can be sealed with plugs, absorbent substrates, gel carriers, or semi-permeable membranes as leak-proof structures. In use, the operator can apply bending or tensile force to the breakable connection 103 to cause it to break, thereby forming a new hollow entrance at the break point; the broken carrier segment can be placed on the ground surface, near tree bases, near termite activity channels, or near pest feeding paths, allowing target insects to enter the receiving cavity through the hollow entrance and contact and consume the bait.

[0069] Because the outer diameter of the breakable connector 103 is small, the size of the entrance formed after breakage is limited, which helps to reduce the possibility of larger non-target animals accidentally entering the containment cavity. When the poisoned bait is not sensitive to air, a vent hole may not be provided at the end; when it is necessary to extend the delivery cycle, the length or volume of the containment cavity at the end can be appropriately increased.

[0070] 4. Drone Deployment Methods

[0071] like Figure 8 As shown, when the rod-shaped delivery tube is used in conjunction with the drone delivery device, the drone delivery mechanism can clamp the two ends, one end, or the middle area of ​​the delivery tube. When the drone reaches the target area, the delivery mechanism applies tension, bending force, or release impact to the breakable connection 103, causing it to break. At least one segment detaches from the delivery mechanism and falls towards the target area. Because the delivery tube has a center-of-gravity offset structure, the broken segment is more likely to form a spatial posture conducive to release during descent and landing, thereby improving delivery reliability.

[0072] Example 2

[0073] like Figure 9 and Figure 10 As shown, this embodiment is a further improvement on embodiment 1. A flexible connector 104 is provided between the first end 101 and the second end 102. The flexible connector 104 is arranged across the breakable connecting part 103 or its adjacent area, so that after the rod-shaped structure delivery tube breaks in the middle connecting section 103, the segments formed by the break still maintain a flexible connection relationship.

[0074] In this embodiment, the flexible connector 104 can be a rope-like, strip-like, wire-like, or sheet-like component, and its material can be fiber material, polymer material, composite material, or other materials with flexibility and tensile strength. The two ends of the flexible connector 104 can be fixed in the inner cavity 107 of the first end 101 and the second end 102, respectively, or can be connected to the corresponding ends by means of embedding, passing through, bonding, heat fusion fixing, snap-fitting, or nodular limiting.

[0075] To improve the connection reliability of the flexible connector 104 during fracture and fall, a limiting structure 106 can be provided on the flexible connector 104. The limiting structure 106 can be a limiting ball, a limiting block, a nodule, an enlarged diameter section, a stop block, or a combination thereof, and its size is larger than the minimum through hole size of the flexible connector 104 at the insertion position, so as to form a mechanical limit when the flexible connector 104 is under tension, preventing the flexible connector 104 from slipping out of the end cavity 107 or the connection part.

[0076] like Figure 10 As shown, when the rod-shaped delivery tube is intact, the flexible connector 104 can be in a relaxed, retracted or non-bearing state of the main structural strength, without affecting the overall forming, storage and delivery of the delivery tube; when the breakable connector 103 breaks, the flexible connector 104 gradually unfolds under force, which is used to limit the relative separation distance between the segments after the break.

[0077] like Figure 11 As shown, in another embodiment, the flexible connector 104 can also be disposed outside the rod-shaped delivery tube, for example, wrapped around the outer surface of the delivery tube, or fixed to the outside of the first end 101 and the second end 102 respectively (connected and fixed to the corresponding ends by means of embedding, passing through, bonding, heat fusion fixing, snap-fitting, or nodular limiting). The external flexible connector 104 is easy to process, replace and maintain, and is suitable for scenarios with specific requirements for the unfolding shape after breakage.

[0078] like Figure 12 As shown, when the rod-shaped delivery tube is thrown, falls, or subjected to external force, it breaks at the breakable connection 103. The broken segments can relatively unfold, swing, or suspend around the connection point under the constraint of the flexible connector 104, thereby forming a restricted unfolding structure or a suspended structure. By adjusting the length, flexibility, and connection position of the flexible connector 104, the unfolding angle, spacing, and spatial distribution between the segments can be changed.

[0079] In one application, the multiple segments after fracture can be suspended on tree branches, canopies or other high supports by flexible connectors 104, so that the functional ends are distributed in different spatial positions, which is conducive to the spread of biological control insects or the exposure of baits; in another application, the multiple segments after fracture can form a restricted deployment state on the ground or near the target channel to improve the release of contents and the effect of functional coverage.

[0080] like Figure 13As shown, when the rod-shaped delivery tube is used for delivery to drones or other mobile platforms, the breakable connecting part 103 can be broken by external force during the delivery process. After the break, the segments separate and unfold under the combined action of inertia, gravity and air resistance, and are kept connected by the flexible connector 104, thereby forming a controlled unfolding state suitable for aerial delivery.

[0081] like Figure 14 and Figure 15 As shown, in some embodiments, the flexible connector 104 may be partially or completely housed within the end cavity 107 and is disposed together with insects, bait, poison bait, agents, or other functional contents. Upon breakage, the flexible connector 104 is gradually pulled out of the cavity 107, while simultaneously exposing some of the contents to the outside. In another embodiment, the unfolding of the flexible connector 104 under force can trigger communication between the sub-cavity 109 and the channel 108, thereby enabling the release, diffusion, or exposure of the contents for feeding.

[0082] In some embodiments, the total length of the rod-shaped delivery tube can be 20 mm to 120 mm; the outer diameter of the first end 101 and the second end 102 can be 5 mm to 15 mm; the outer diameter of the middle connecting section 103 can be 1.0 mm to 5.0 mm, and can be 1.5 mm to 3.0 mm when adapting to narrow holes such as longhorn beetle tunnels; the wall thickness of the first end 101 and the second end 102 can be 0.5 mm to 2.0 mm; and the wall thickness of the middle connecting section 103 can be 0.2 mm to 1.0 mm. The above dimensions are merely preferred embodiments and do not constitute a limitation on the scope of protection of this invention.

Claims

1. A rod-shaped dispensing tube, characterized in that, include: A first end, a second end, and a breakable connecting portion between the first end and the second end are connected sequentially along the axial direction; At least one of the first end and the second end has an internal cavity for containing contents; The breakable connection portion forms a weaker area that is more prone to breakage compared to the first end and the second end. The breakable connecting part can break first under manual operation or mechanical force, so that the rod-shaped structure delivery tube is separated into at least two sections, and at least one of the broken sections forms a release opening that communicates with the receiving cavity. The rod-shaped delivery tube is equipped with a center of gravity offset structure, which causes the center of gravity of at least one segment formed after the rod-shaped delivery tube breaks to be offset from the middle of the segment and closer to the end of the segment in the axial direction, so as to improve the attitude stability of the delivery tube during the drop and landing process.

2. The rod-shaped delivery tube according to claim 1, characterized in that, The outer diameter of the breakable connector is smaller than the outer diameter of the first end and the second end; and / or, the wall thickness of the breakable connector is smaller than the wall thickness of the first end and the second end; and / or, the breakable connector is provided with one or more of the following: thinning groove, notch, gap, and material weakening zone.

3. The rod-shaped delivery tube according to claim 1, characterized in that, A flexible connector is provided between the first end and the second end. The flexible connector is provided across the breakable connecting part or its adjacent area, so that the segments formed after the breakable connecting part breaks remain connected and the relative separation distance between the segments is limited.

4. The rod-shaped delivery tube according to claim 3, characterized in that, The flexible connector is embedded, fixed, or inserted inside the rod-shaped delivery tube; when the rod-shaped delivery tube is not broken, the flexible connector is in a relaxed, retracted, or non-load-bearing state.

5. The rod-shaped delivery tube according to claim 3, characterized in that, The flexible connector is provided with a limiting structure to prevent it from slipping or coming off during breakage, falling, or stretching.

6. The rod-shaped delivery tube according to claim 5, characterized in that, The limiting structure is composed of a limiting ball, a limiting block, a nodule, an enlarged diameter section, a stop block, or a combination thereof, and the size of the limiting structure is larger than the minimum through hole size of the flexible connector insertion part.

7. The rod-shaped delivery tube according to claim 3, characterized in that, The flexible connector is located outside the rod-shaped delivery tube and is wrapped around the outer surface of the rod-shaped delivery tube.

8. The rod-shaped delivery tube according to claim 7, characterized in that, The two ends of the flexible connector are respectively connected to the outer sides of the first end and the second end through fixing points.

9. The rod-shaped delivery tube according to any one of claims 3 to 8, characterized in that, The flexible connector is a rope-like, strip-like, linear, or sheet-like flexible component, and is made of fiber materials, polymer materials, or composite materials with flexibility and tensile strength.

10. The rod-shaped delivery tube according to claim 1 or 2, characterized in that, The first end and / or the second end are provided with vent holes and / or sealing structures. The number, diameter and distribution of the vent holes are set according to the ventilation requirements of the contents. The sealing structure is a detachable sealing component, a biodegradable sealing film, a limiting cap or a limiting mesh cover, so as to limit the premature escape or leakage of the contents when not in use.

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