Easy-to-disassemble and assemble tobacco seedling trays

Abstract

This utility model discloses a flue-cured tobacco seedling tray that is easy to disassemble and assemble, including a unit seedling tray. The surface of the unit seedling tray has several holes arranged in a rectangular array, and each hole has a water absorption hole at its bottom. In this utility model, through the cooperation structure of the splicing block and the splicing frame, combined with the design of columnar clips, springs and limiting hooks, multiple unit seedling trays can be spliced ​​or disassembled by manual operation without the need for tools, which greatly improves the efficiency of handling, storage and use of seedling trays. It is especially suitable for the need to flexibly adjust the seedling area in large-scale seedling scenarios. When splicing, the spring pushes the limiting hook of the columnar clip to form a firm engagement with the splicing frame, ensuring that the unit seedling trays are tightly connected and avoiding loosening due to vibration during use. When unlocking, the arc sleeve of the cross clamp holds the protruding column through elastic deformation, which can temporarily fix the retracted state of the columnar clip and prevent it from accidentally resetting, thus ensuring the smoothness of the disassembly process.

Description

Technical Field

[0001] This utility model relates to the field of flue-cured tobacco seedling trays, and more particularly to flue-cured tobacco seedling trays that are easy to disassemble and assemble. Background Technology

[0002] The well-drilling method for transplanting flue-cured tobacco seedlings involves using a specialized well-drilling tool to create wells 8-10 cm in diameter and 18-20 cm deep on the tobacco ridges at specified plant spacing. Seedlings with stems 3-4 cm tall and 4-6 true leaves are then placed into the wells. Each seedling is given 230-250 ml of water and fertilizer at the time of transplanting. Floating seedling cultivation is a common method for flue-cured tobacco seedlings. It involves filling polyethylene seedling trays with artificially prepared substrate, sowing the seeds, and then placing them in a nutrient solution for seedling cultivation. This falls under the category of soilless cultivation and has advantages such as requiring less land for seedling cultivation, high efficiency, convenient management, and rapid transportation and transplanting.

[0003] Traditional tobacco seedling trays are mostly of one-piece structure or use a simple snap-fit ​​connection, which has many shortcomings in practical use: On the one hand, the fixed size of integrated seedling trays makes it impossible to flexibly adjust the area according to the scale of seedling production. They also occupy a large space during handling and storage, especially in large-scale seedling production scenarios, increasing transportation costs and making it difficult to adapt to the space requirements of different seedling stages. On the other hand, the existing modular seedling trays often rely on complex latches or auxiliary tools for assembly and disassembly, which is cumbersome and inefficient. After assembly, the connections are often not secure, and vibrations during handling or daily management can easily cause loosening, affecting the stability of the seedling trays. Furthermore, the unlocking mechanisms of some modular seedling trays lack temporary fixing functions, and components can easily pop open accidentally during disassembly, posing a safety hazard.

[0004] On the other hand, the holes in traditional seedling trays are mostly single cylindrical structures. Although they can accommodate seedling substrate, they are not conducive to the directional development of tobacco seedling roots and easily cause the roots to become tangled and intertwined in the holes. At the same time, the substrate support structure at the bottom of the holes is poorly designed. Either the support is insufficient, causing the substrate to fall apart, or the pores are too small, hindering the extension of the roots. During transplanting, root damage often affects the survival rate of tobacco seedlings and increases seedling costs.

[0005] To address this, a flue-cured tobacco seedling tray that is easy to disassemble and assemble is proposed. It has the advantages of quick disassembly and assembly, firm connection, safe operation, and optimization of the root growth environment of tobacco seedlings, thereby solving the problems mentioned in the background technology. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a flue-cured tobacco seedling tray that is easy to disassemble and assemble.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a flue-cured tobacco seedling tray that is easy to disassemble and assemble, comprising a unit seedling tray. The surface of the unit seedling tray has a plurality of holes arranged in a rectangular array, and each hole has a water absorption hole at its bottom. A splicing block is fixed on two adjacent sides of the unit seedling tray, and a splicing frame is fixed on the other two adjacent sides of the unit seedling tray. Two columnar clips are symmetrically installed inside the cavity of the splicing block, and a spring is installed between the two columnar clips. A limit hook is provided at one end of the two columnar clips extending to the outside of the splicing block. A rectangular opening is opened on the top surface of the splicing block, and a cross clamp is fixed in the middle of the rectangular opening. A protruding post is integrally injection molded on the top of each of the two columnar clips, and the protruding post extends through the rectangular opening to the outside of the splicing block. Arc sleeves are fixed on the left and right sides of the cross clamp corresponding to the protruding post. Two strip-shaped airbags are symmetrically installed on the bottom surface of the unit seedling tray.

[0008] As a further description of the above technical solution: the cavity is composed of an upper circular part and a lower conical part, and a circular matrix support net is movably installed at the junction of the circular part and the conical part of the cavity.

[0009] As a further description of the above technical solution: both of the two columnar clips have columnar protrusions integrally injection molded on their facing surfaces, and the columnar protrusions extend to the inside of the spring.

[0010] As a further description of the above technical solution: the splicing block and the splicing frame are the same size, and the length of the columnar clip extending out of the splicing block is greater than the thickness of the splicing frame.

[0011] As a further description of the above technical solution: the limiting hook has a square structure, and the limiting hooks of the two columnar clamps are arranged opposite to each other.

[0012] As a further description of the above technical solution: the inner diameter of the arc-shaped sleeve of the cross clamp is adapted to the diameter of the protruding post, and a notch is reserved on the side of the arc-shaped sleeve facing the protruding post.

[0013] This utility model has the following beneficial effects: In this invention, the splicing blocks and splicing frames work together, and the design incorporates columnar clips, springs, and limiting hooks. Multiple seedling trays can be spliced ​​or disassembled manually without the need for tools, significantly improving the efficiency of handling, storage, and use. This is particularly suitable for large-scale seedling production where the need for flexible adjustment of the seedling area is paramount. During splicing, the spring pushes the limiting hook of the columnar clip to securely engage with the splicing frame, ensuring a tight connection between the seedling trays and preventing loosening due to vibration during use. During unlocking, the arc-shaped sleeve of the cross clamp elastically grips the protruding column, temporarily fixing the retracted state of the columnar clip and preventing accidental reset. This ensures smooth disassembly and avoids operational hazards caused by parts popping open.

[0014] In this invention, the holes adopt a composite structure of "circular upper part + conical lower part", which, together with the substrate support net, can provide ample growing space for tobacco seedlings and guide the roots to develop downwards, reducing tangling; the substrate support net can effectively support the substrate and allow the roots to pass through, and can protect the integrity of the roots during transplanting, reducing the seedling damage rate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the flue-cured tobacco seedling tray of this utility model, which is easy to disassemble and assemble; Figure 2 A schematic diagram of the structure of multiple unit seedling trays assembled together; Figure 3 This is a cross-sectional view of a single seedling tray; Figure 4 This is a schematic diagram of the internal structure of the splicing block.

[0016] Legend: 1. Unit seedling tray; 2. Hole; 3. Interlocking block; 4. Interlocking frame; 5. Columnar clamp; 6. Strip-shaped airbag; 7. Rectangular opening; 8. Cross clamp; 9. Protruding column; 10. Arc-shaped sleeve; 11. Substrate support net; 12. Water absorption hole; 13. Limiting hook; 14. Spring. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] According to an embodiment of the present invention, a flue-cured tobacco seedling tray that is easy to disassemble and assemble is provided.

[0019] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-4As shown, the easily detachable and assembleable flue-cured tobacco seedling tray according to an embodiment of the present invention includes a unit seedling tray 1. The surface of the unit seedling tray 1 has a plurality of holes 2 arranged in a rectangular array, and each hole 2 has a water absorption hole 12 at its bottom. A splicing block 3 is fixed to two adjacent sides of the unit seedling tray 1, and a splicing frame 4 is fixed to the other two adjacent sides of the unit seedling tray 1. Two columnar clips 5 are symmetrically installed inside the cavity of the splicing block 3, and a spring 14 is installed between the two columnar clips 5. Each of the two columnar clips 5 extending to the outer side of the splicing block 3 is provided with... The unit has a limiting hook 13. A rectangular opening 7 is provided on the top surface of the splicing block 3, and a cross clamp 8 is fixed in the middle of the rectangular opening 7. Two columnar clips 5 have integrally injection-molded protrusions 9 on their tops, extending through the rectangular opening 7 to the outside of the splicing block 3. Arc-shaped clips 10 are fixed to the left and right sides of the cross clamp 8 corresponding to the protrusions 9. Two strip-shaped airbags 6 are symmetrically installed on the bottom surface of the unit seedling tray 1. The unit seedling tray 1 is preferably made of high-strength PP plastic through integral injection molding, possessing characteristics of light weight, aging resistance, and impact resistance, and can adapt to humidity changes in the seedling environment and daily handling needs. The surface of the unit seedling tray 1 has several holes 2 arranged in a rectangular array. The number of holes 2 can be designed according to the actual seedling scale, such as 32, 50, or 72 holes. The spacing between adjacent holes 2 remains consistent (usually 2-3 cm), facilitating unified management of the seedling process and ensuring that each tobacco seedling receives uniform light and growth space. Each hole 2 has a water absorption hole 12 with a diameter of about 0.5-1cm at the center of its bottom. The water absorption hole 12 can draw water from the bottom of the seedling tray into the substrate inside the hole 2 through capillary action to meet the water requirements of tobacco seedling growth, and can also prevent water accumulation in the hole 2 from causing root rot. In order to realize the rapid splicing and disassembly of multiple unit seedling trays 1, splicing blocks 3 are fixed on two adjacent frames of unit seedling tray 1 (for example, one side frame in the length direction and one side frame in the width direction). The splicing blocks 3 are fixed to the frame by hot melt welding process, which has high connection strength. On the other two adjacent frames of unit seedling tray 1, splicing frames 4 are fixed accordingly. The positions of splicing blocks 3 and splicing frames 4 are matched with each other, and the two fit together after being combined. The interior of the splicing block 3 is a cavity structure with an opening on one side. Two columnar clips 5 are symmetrically installed inside the cavity. The columnar clips 5 are made of rigid ABS plastic and have good toughness. A spring 14 is horizontally installed between the two columnar clips 5. When the spring 14 is in its natural state, it can push the two columnar clips 5 to extend outward. The ends of the two columnar clips 5 extending to the outside of the splicing block 3 are integrally formed with limit hooks 13 for mechanical locking with the splicing frame 4. A rectangular opening 7 is opened on the top surface of the splicing block 3. The length of the rectangular opening 7 is slightly greater than the maximum distance between the two protruding posts 9. A cross clamp 8 is fixed in the middle position by screws. The cross clamp 8 is made of elastic plastic and has a certain deformation capability.Both columnar clips 5 have a cylindrical protrusion 9 integrally injection-molded at their tops. The diameter of the protrusion 9 is approximately 0.8-1cm, and its top extends through the rectangular opening 7 to the outside of the splicing block 3. The columnar clips 5 can be moved left and right by manual adjustment. Arc-shaped sleeves 10 are fixed on both sides of the cross clamp 8 corresponding to the positions of the protrusions 9. The arc-shaped sleeves 10 cooperate with the protrusions 9 to lock the position of the columnar clips 5. In addition, two strip-shaped airbags 6 are symmetrically installed on the bottom surface of the unit seedling tray 1. The strip-shaped airbags 6 are made of wear-resistant rubber, which facilitates floating in hydroponics. Please refer to Figure 3 Hole 2 consists of an upper circular section and a lower conical section. A circular substrate support net 11 is movably installed at the junction of the circular and conical sections of hole 2. This composite structure design takes into account both substrate capacity and root guidance function. The upper circular section has a diameter of 5-8cm and a depth of 3-5cm, and can be filled with seedling substrate (such as a mixture of peat moss and vermiculite) to provide sufficient nutrient space for the initial growth of tobacco seedlings. The lower conical section has a height of 2-3cm, and its diameter gradually decreases from top to bottom until it connects with the bottom water absorption hole 12. This structure guides the roots of tobacco seedlings to grow downwards, preventing the roots from coiling inside hole 2. At the junction of the circular and conical sections of hole 2, a circular substrate support net 11 is movably installed via a slot. The substrate support net 11 is made of nylon woven material with a mesh diameter of 1-2mm, and its edges are embedded in the slot, allowing for free removal and replacement. This support net can support the upper substrate, preventing it from falling from the conical part, and also allow the roots of the tobacco seedlings to pass through the mesh and enter the conical part, ensuring the normal growth and development of the roots. At the same time, when transplanting tobacco seedlings, the support net can also reduce substrate spillage and protect the integrity of the root system.

[0020] Please refer to Figure 4 Both columnar clips 5 have integrally injection-molded columnar protrusions on their facing surfaces, extending into the inner side of the spring 14. The diameter of the columnar protrusions matches the inner diameter of the spring 14, and the length of the columnar protrusions is 1 / 3 to 1 / 2 of the natural length of the spring 14, with their free ends extending into the inner side of the spring 14. The core function of this design is to position and guide the spring 14: when the two columnar clips 5 retract inward under external force, the columnar protrusions can limit the lateral displacement of the spring 14, preventing the spring 14 from twisting or bending due to uneven force; when the external force is removed, and the spring 14 returns to its original position, pushing the columnar clips 5 outward, the columnar protrusions can ensure that the elastic force of the spring 14 is evenly applied to the two columnar clips 5, ensuring the synchronization of their movement, thereby improving the stability and service life of the splicing structure.

[0021] Please refer to Figure 1 and Figure 2The splicing block 3 and the splicing frame 4 are the same size. The length of the columnar clip 5 extending from the splicing block 3 is greater than the thickness of the splicing frame 4. Specifically, the length, width, and height of both are consistent (e.g., 5cm long, 3cm wide, and 2cm high). This equal-size design allows the splicing block 3 to fit snugly against the splicing frame 4, forming a tight-fitting connection structure and preventing gaps or wobbling after splicing. Simultaneously, the length of the columnar clip 5 extending beyond the outer side of the splicing block 3 (i.e., the distance from the outer wall of the splicing block to the outer end of the limiting hook 13) is greater than the thickness of the splicing frame 4 (i.e., the thickness of the side wall of the splicing frame 4), typically 2-3mm longer. This dimensional relationship ensures that during splicing, when the splicing block 3 and the splicing frame 4 are fitted together, the limiting hook 13 on the columnar clip 5 can completely pass through the side wall of the splicing frame 4 and extend to its outer side. This secure connection is achieved through the engagement of the limiting hook 13 with the outer wall of the splicing frame 4, preventing the two seedling trays 1 from separating after splicing.

[0022] Please refer to Figure 1 and Figure 4 The limiting hook 13 has a square structure, with the limiting hooks 13 of the two columnar clips 5 arranged back to back. The limiting hook 13 adopts a square structure design with a side length of about 8-10mm and a thickness of 2-3mm. Compared with the traditional pointed hook design, this structure can increase the contact area with the splicing frame 4, distribute the force, and avoid damage to the contact parts of the splicing frame 4 due to stress concentration after long-term use. The limiting hooks 13 of the two columnar clips 5 are arranged back to back (i.e., facing the two sides of the splicing block 3 respectively). This layout allows the two limiting hooks 13 to simultaneously engage from both sides of the splicing frame 4 when the two columnar clips 5 extend outward under the action of the spring 14, thereby firmly locking the splicing block 3 to the splicing frame 4. When disassembly is required, simply press the two protruding posts 9 in the middle to drive the columnar clips 5 to retract inward, so that the two limiting hooks 13 can simultaneously disengage from the splicing frame 4. The operation is convenient and the force is balanced.

[0023] Please refer to Figure 1 The inner diameter of the arc-shaped clamp 10 of the cross clamp 8 is adapted to the diameter of the protruding post 9. A notch is reserved on the side of the arc-shaped clamp 10 facing the protruding post 9. Typically, the inner diameter of the arc-shaped clamp 10 is 0.5-1mm larger than the diameter of the protruding post 9. This gap design ensures that the protruding post 9 can be smoothly inserted into the arc-shaped clamp 10, and also allows the inner wall of the clamp to fit tightly against the surface of the protruding post 9, forming a stable limiting position. The notch on the side of the arc-shaped clamp 10 facing the protruding post 9 has a width approximately 1 / 3 of the diameter of the protruding post 9. Its function is to provide a channel for the protruding post 9 to enter and exit: when unlocking the splicing block 3 and the splicing frame 4, the protruding post 9 is pushed to move along the rectangular opening 7 and insert into the arc-shaped clamp 10. At this time, the arc-shaped clamp 10 undergoes a slight deformation due to its own elasticity, tightly holding the protruding post 9 through the contraction of the notch, preventing accidental displacement, until the two columnar clips 5 converge towards each other, facilitating the removal of the splicing block 3 and the splicing frame 4.

[0024] Working principle: In use, when multiple unit seedling trays 1 need to be spliced, the splicing block 3 of one unit tray is aligned with the splicing frame 4 of another unit tray and moved to fit together. During the movement, the side wall of the splicing frame 4 presses against the limiting hook 13 of the columnar clamp 5, forcing the two columnar clamps 5 to overcome the elastic force of the spring 14 and close towards each other. When the splicing block 3 is completely fitted with the splicing frame 4, the spring 14 returns to its original position and pushes the columnar clamp 5 to extend outward. The limiting hook 13 pops out from the inside of the splicing frame 4 and engages with the edge of the frame, achieving a firm connection between the two unit trays. When it is necessary to separate the unit seedling tray 1, the two protruding posts 9 on the top surface of the splicing block 3 are manually pushed, causing the protruding posts 9 to move towards the center along the rectangular opening 7, driving the columnar clamps 5 to overcome the elastic force of the spring 14 and close towards each other. At this time, the limiting hook 13 is disengaged from the splicing frame 4. Continue pushing the protruding posts 9 until they are fully engaged. The arc-shaped clamp 10, embedded in the cross clamp 8, contracts through the notch due to its own elasticity and tightly holds the protruding post 9, temporarily fixing the retracted state of the columnar clip 5 and preventing it from returning to its original position under the action of the spring 14. Maintaining this state allows for easy separation of the splicing block 3 from the splicing frame 4, completing the disassembly. After the seedling substrate is filled into the hole 2, the bottom water absorption hole 12 absorbs water from the water source below the seedling tray through capillary action, providing the humidity required for the growth of the tobacco seedlings. The substrate support net 11 supports the upper substrate and allows the roots to pass through, guiding the roots to grow towards the conical part at the bottom of the hole 2, avoiding root entanglement. The bottom strip-shaped airbag 6 meets the requirements of floating hydroponic seedling cultivation.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tobacco seedling raising tray which is easy to disassemble and assemble, comprising a unit seedling raising tray (1), characterized in that: The surface of the unit seedling tray (1) is provided with a rectangular array of holes (2), and each hole (2) has a water absorption hole (12) at its bottom. Two adjacent frames of the unit seedling tray (1) are fixed with splicing blocks (3), and two other adjacent frames of the unit seedling tray (1) are fixed with splicing frames (4). Two columnar clips (5) are symmetrically installed inside the cavity of the splicing block (3), and a spring (14) is installed between the two columnar clips (5). The two columnar clips (5) extend to the splicing block. (3) A limit hook (13) is provided at one end of the outer side. A rectangular opening (7) is provided on the top surface of the splicing block (3), and a cross clamp (8) is fixed in the middle of the rectangular opening (7). The top of the two columnar clips (5) is integrally injection molded with a protruding column (9), and the protruding column (9) extends through the rectangular opening (7) to the outside of the splicing block (3). The left and right sides of the cross clamp (8) are fixed with arc sleeves (10) corresponding to the protruding column (9). Two strip-shaped airbags (6) are symmetrically installed on the bottom surface of the unit seedling tray (1).

2. The tobacco seedling raising tray according to claim 1, wherein: The cavity (2) is composed of an upper circular part and a lower conical part, and a circular matrix support net (11) is movably installed at the junction of the circular part and the conical part of the cavity (2).

3. The tobacco seedling raising tray according to claim 1, wherein: Both of the two columnar clips (5) have columnar protrusions integrally injection molded on their facing surfaces, and the columnar protrusions extend to the inside of the spring (14).

4. The tobacco seedling raising tray that facilitates disassembly and assembly according to claim 1, wherein: The splicing block (3) and the splicing frame (4) are the same size, and the length of the columnar clip (5) extending out of the splicing block (3) is greater than the thickness of the splicing frame (4).

5. The tobacco seedling tray that is easy to disassemble and assemble according to claim 1, characterized in that: The limiting hook (13) has a square structure, and the limiting hooks (13) of the two columnar clips (5) are arranged opposite to each other.

6. The tobacco seedling growing tray convenient to disassemble and assemble according to claim 1, characterized in that: The inner diameter of the arc sleeve (10) of the cross clamp (8) is adapted to the diameter of the protrusion (9), and the side of the arc sleeve (10) facing the protrusion (9) has a notch.

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