Protective device for afforestation nursery stocks

Abstract

The embodiment of the utility model provides an afforestation nursery stock protection device which comprises a protection frame, and the protection frame is of a polygonal structure defined by protection plates; the locking structure is used for connecting two adjacent groups of protection plates so as to fix the shape of the protection frame, the locking structure comprises an elastic occlusion structure and a locking buckle, and the elastic occlusion structure and the locking buckle are locked and matched with each other; one end of the supporting leg is connected with the bottom of the protective frame, and the supporting leg is used for supporting the protective frame; the soil fixing plate is used for reducing water evaporation and preventing the protection frame from toppling over, and the other ends of the supporting legs are connected with the soil fixing plate; wherein the protection plates are provided with splicing blocks and splicing grooves, and when the protection plates form a polygon in a surrounding mode, the splicing blocks are embedded in the splicing grooves of the adjacent protection plates. Through the scheme of the embodiment of the invention, loosening and falling can be prevented.

Description

Technical Field

[0001] This application relates to the field of forestry engineering technology, specifically to a protective device for afforestation seedlings. Background Technology

[0002] Tree seedling protection devices are primarily used to protect seedlings from damage caused by the external environment during planting and early growth. Through a specific structural design, they provide stable support and protection for the seedlings, preventing adverse effects such as animal grazing and damage from strong winds. However, in practical use, the device may face the challenge of preventing loosening and detachment. Factors such as soil settlement, external vibrations, or insufficiently secure fixing methods can cause the protective device to loosen, failing to provide continuous and effective protection for the seedlings, thus affecting the stability and reliability of its protective function. Summary of the Invention

[0003] In view of this, the present disclosure provides a protective device for afforestation seedlings, which at least partially solves the problems existing in the prior art.

[0004] This application discloses a protective device for afforestation seedlings, comprising:

[0005] A protective frame, wherein the protective frame is a polygonal structure formed by protective plates;

[0006] A locking structure is used to connect two adjacent sets of the protective plates to fix the shape of the protective frame. The locking structure includes an elastic interlocking structure and a locking buckle, which are locked together.

[0007] The support leg is connected at one end to the bottom of the protective frame and is used to support the protective frame.

[0008] A soil stabilizing plate is used to reduce moisture evaporation and prevent the protective frame from tipping over; the other end of the support leg is connected to the soil stabilizing plate.

[0009] The protective plate is provided with splicing blocks and splicing grooves. When the protective plates form a polygon, the splicing blocks are embedded in the splicing grooves of adjacent protective plates.

[0010] According to one embodiment, the two ends of the support leg are respectively hinged to the protective frame and the soil stabilizing plate to adjust the angle between the support leg and the soil stabilizing plate.

[0011] According to one embodiment, the support leg is hinged to the protective frame via a bolt and nut assembly, which can lock and fix the angle of the support leg.

[0012] According to one embodiment, the elastic engagement structure includes a handle and a locking rod. The elastic engagement structure allows the locking rod to engage or disengage from the locking buckle by rotating the handle. A spring is sleeved on the locking rod to enhance the engagement force between the locking rod and the locking buckle and prevent loosening due to external forces.

[0013] According to one embodiment, the outer surface of the handle is provided with a hand grip groove (211a) to facilitate manual tightening or loosening.

[0014] According to one embodiment, the locking buckle is provided with a fastening groove, and the fastening groove is provided with anti-slip teeth (222a) to increase the friction between the elastic interlocking structures.

[0015] 7. According to one embodiment, the locking buckle is provided with a snap-fit ​​groove, which is arc-shaped and used to guide the elastic engagement structure to engage at a predetermined position.

[0016] According to one embodiment, it also includes a positioning pin, wherein a through hole is formed in the soil stabilizing plate, and the positioning pin passes through the through hole and is inserted into the soil to fix the position of the soil stabilizing plate.

[0017] According to one embodiment, the protective plate has a perforated section, through which the protective frame achieves ventilation and is more aesthetically pleasing.

[0018] This disclosure provides a protective device for afforestation seedlings, comprising: a protective frame, the protective frame being a polygonal structure formed by protective plates; a locking structure for connecting two adjacent sets of protective plates to fix the shape of the protective frame, the locking structure including an elastic interlocking structure and a locking buckle, the elastic interlocking structure and the locking buckle being mutually locked together; a support leg, one end of which is connected to the bottom of the protective frame for supporting the protective frame; and a soil stabilizing plate for reducing moisture evaporation and preventing the protective frame from tipping over, the other end of the support leg being connected to the soil stabilizing plate; wherein, the protective plates are provided with splicing blocks and splicing grooves, and when the protective plates form a polygon, the splicing blocks are embedded in the splicing grooves of adjacent protective plates. The solution of this disclosure can solve the problem of preventing loosening and detachment. Attached Figure Description

[0019] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0020] Figure 1 This is a schematic diagram of the overall structure of a protective device for afforestation seedlings according to an embodiment of this utility model.

[0021] Figure 2 yes Figure 1 Enlarged schematic diagram of part A in the middle.

[0022] Figure 3 This is a schematic diagram of the locking structure of a protective device for afforestation seedlings in the locked state, according to an embodiment of this utility model.

[0023] Figure 4 This is a schematic diagram of the locking structure of a protective device for afforestation seedlings in the unlocked state, according to an embodiment of this utility model.

[0024] Figure 5 This is a schematic diagram of the structure of the protective plate of a protective device for afforestation seedlings according to an embodiment of this utility model.

[0025] In the diagram: 1. Protective frame; 11. Protective plate; 111. Interlocking block; 112. Interlocking groove; 113. Hollowed-out section; 2. Locking structure; 21. Elastic interlocking structure; 211. Handle; 211a. Hand grip groove; 212. Locking rod; 22. Locking buckle; 222. Snap-fit ​​groove; 222a. Anti-slip serrations; 3. Support leg; 4. Soil stabilizing plate; 41. Through hole; 5. Spring; 6. Positioning pin Detailed Implementation

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0027] like Figure 1 As shown, the afforestation seedling protection device of this application includes four main components: a protective frame 1, a locking structure 2, a support leg 3, and a soil stabilizing plate 4. Each component is described in detail below.

[0028] The protective frame 1 is a polygonal structure formed by multiple protective panels 11, which can form a protective area around the seedlings and effectively prevent external objects from damaging them. The protective frame 1 can be constructed by splicing together protective panels 11 of a certain length and width, for example, by using metal, plastic or wood materials to make the protective panels 11, ensuring that the protective frame 1 as a whole has a certain strength and rigidity.

[0029] The locking structure 2 is a key component used to connect the two protective plates 11. It can fix the shape of the protective frame 1 and enhance its overall rigidity, preventing loosening or detachment due to external forces. The locking structure 2 specifically includes an elastic interlocking structure 21 and a locking buckle 22 (see details). Figure 2 The two work together by a locking mechanism. In actual technical implementation, the elastic interlocking structure 21 can be made of spring 5 or other elastic elements to maintain a moderate pressure between adjacent protective plates 11, and the locking buckle 22 and the elastic interlocking structure 21 are manually inserted to achieve the final fastening effect.

[0030] Support leg 3, as an important load-bearing component, is installed at the bottom of the protective frame 1. One end of it is connected to the protective frame 1, effectively and stably supporting the protective frame 1 on the ground. Specifically, the support leg 3 can be made of various materials (such as stainless steel and aluminum alloy) to adapt to different environmental conditions, and can be securely connected to the bottom of the protective frame 1 through welding, slot connection, or other methods.

[0031] The soil stabilizing plate 4 is located below the bottom of the support leg 3 and connected to it. This component reduces moisture evaporation by compacting the ground soil, while also improving the overall structure's wind resistance and preventing the protective frame 1 from tipping over. For example, in production practice, the soil stabilizing plate 4 can be designed with sufficient weight and planar contact area to ensure its effective function. Alternatively, plates of appropriate shapes (round, square) can be selected according to the terrain characteristics and firmly fixed to the end of each support leg 3 with screws.

[0032] Regarding the technical issue of preventing loosening and detachment, the key to the aforementioned features lies in the locking structure 2 used. By combining the elastic interlocking structure 21 and the locking buckle 22, a double-layer reinforcement mechanism is achieved: on the one hand, the elastic force generated by the elastic element itself increases friction; on the other hand, the locking buckle 22 further restricts positioning. When encountering external vibrations or impacts, due to the dual protection design, even if one part malfunctions, the other will continue to function to maintain the overall stability of the protective frame 1. This greatly reduces the risk of loosening and detachment.

[0033] like Figure 1As shown, in one embodiment, one end of the support leg 3 of the afforestation seedling protection device of this application is installed near the bottom of the protective frame 1, and the other end is connected to the soil stabilizing plate 4. This connection is achieved through a hinge, a structural design that allows the support leg 3 to change the angle between itself and the soil stabilizing plate 4 within a certain range. Therefore, when the device is placed on ground with significant topographical variations, the soil stabilizing plate 4 can adaptively conform to the ground contour, ensuring stability. Since the protective frame 1 itself plays a primary role in protecting the seedlings, the reliable fit of the soil stabilizing plate 4 is particularly important for enhancing overall stability and soil compaction.

[0034] In practice, the connection can be achieved, for example, by configuring a hinge point at each end of the support leg 3. One hinge is fixedly welded to the bottom area inside the protective frame 1, while the other end is connected to the middle of the soil stabilizing plate 4 near its edge. To ensure smooth and unobstructed hinge operation, a pin-type connection structure with high rotational flexibility can be used to assemble the relevant components, while a locking and limiting mechanism prevents the components from moving out of the designated range. In this way, the angle between the support leg 3 and the soil stabilizing plate 4 can be freely adjusted according to the actual terrain conditions.

[0035] like Figure 1 As shown, in one embodiment, the support leg 3 of the afforestation seedling protection device of this application is hinged to the protective frame 1 via a bolt and nut assembly. One end of the support leg 3 can be adjusted in position and angle around the hinge point to adapt to uneven ground. This hinged connection allows the protective frame 1 to be flexibly adjusted to a stable state, and the support leg 3 and the protective frame 1 are fixed by tightening the bolt and nut assembly after adjustment. Specifically, the bolt passes through the two connection points and is clamped by the nut that mates with it, thereby reliably connecting the components.

[0036] For example, to achieve the above structure, through holes 41 are pre-set on the mounting surfaces corresponding to the bottom of the support leg 3 and the protective frame 1 as a connection base. Bolts are passed through the through holes 41 and tightened with nuts. The angle range and locking state of the support leg 3 are controlled by adjusting the bolt tightness. The hinged design ensures that the support leg 3 can rotate freely within an appropriate range to achieve optimal support. Furthermore, the bolt and nut assembly allows the support leg 3 to be easily disassembled and replaced, facilitating maintenance and transportation.

[0037] like Figures 2-4As shown, in one embodiment, the elastic interlocking structure 21 of the afforestation seedling protection device of this application consists of a handle 211, a locking rod 212, and a spring 5. The handle 211 is movably connected to the locking rod 212, and the locking rod 212 can be rotated within the handle 211. The elastic interlocking structure 21 is disposed on one side of the locking structure 2 and is used in conjunction with a locking buckle 22 disposed on another protective plate 11 to achieve locking and fixing of two adjacent protective plates 11. Specifically, one end of the locking rod 212 can be inserted into and embedded in the locking buckle 22 to form a connection. Under this design, the elastic interlocking structure 21 and the locking buckle 22 together ensure a stable connection between the components of the protective frame 1.

[0038] Furthermore, to enhance locking performance, a spring 5 is also fitted externally to the locking lever 212 of the elastic engagement structure 21. This spring 5 is sleeved on the locking lever 212 and positioned appropriately to provide constant pressure feedback, preventing loosening due to external factors. For example, during locking, the locking lever 212 can be manually rotated to engage with the locking buckle 22; when disassembly is required, the handle can be rotated in the opposite direction to separate them. From a technical implementation perspective, the entire structure can operate stably and reliably by precisely setting the compression stroke of the spring 5 and optimizing the design parameters of the insertion depth of the locking lever 212.

[0039] like Figures 2-4 As shown, in one embodiment, the handle 211 of the afforestation seedling protection device of this application is connected to the elastic engagement structure 21 to assist in manually operating the elastic engagement structure 21 to complete the tightening or loosening action. The handle 211 improves the ease of operation by rationally designing its surface features, specifically by providing a hand grip groove 211a on the outer surface, a structure that adapts to the natural shape of human hand grip. When the user applies grip force, the groove can guide the positioning and force application of the fingers, ensuring more stable and reliable operation. At the same time, since the locking process requires a certain amount of force, the optimized handle 211 helps to disperse the stress concentration that may occur during operation, thereby protecting the operator's joints and muscles from excessive pressure.

[0040] For example, in actual manufacturing, several horizontally distributed semi-circular grooves can be created on the handle 211 through processing techniques. These grooves form a specific regular distribution pattern around the outside of the handle 211 to conform to ergonomic requirements. Furthermore, a soft covering material can be used to cover part of the handle 211 to further enhance grip comfort and anti-slip performance. With this design, the handle 211 is typically connected using a firmly fixed embedded assembly or a one-piece molding method, thereby preventing loosening during use and ensuring the overall functional stability of the device.

[0041] like Figures 2-4As shown, in one embodiment, the locking buckle 22 of the locking structure 2 of the afforestation seedling protection device of this application is provided with a specially constructed fastening groove 222. The fastening groove 222 is a concave structure, located at the center of the side surface of the locking buckle 22 facing the elastic engagement structure 21, and directly contacts and engages with the elastic engagement structure 21 to achieve locking and fixation between the two. To enhance the fixing force, the fastening groove 222 has a specific anti-slip toothed texture 222a structure inside, which increases the coefficient of friction by changing the surface microtexture. The anti-slip toothed texture 222a has a reasonable and regular overall layout, and its depth and shape are optimized according to the actual force requirements, thereby significantly reducing the occurrence of accidental slippage and ensuring the structural stability of the protective frame 1.

[0042] Furthermore, in the locked state, the elastic engagement structure 21 is tightly embedded in the engagement groove 222 of the locking buckle 22, forming a stable mating surface between the two components. For example, the anti-slip serrations 222a can be designed as staggered polygonal raised textures, which can better engage the corresponding feature areas on the surface of the elastic engagement structure 21. Specifically, such a complex anti-slip serration 222a structure can be constructed during the molding process of the locking buckle 22 material through injection molding or machining, ensuring the reliability and durability of the connection between the two.

[0043] like Figure 2 and Figure 4 As shown, in one embodiment, a locking buckle 22 of the afforestation seedling protection device of this application is disposed at the connection position between two adjacent protective plates 11, and is used to cooperate with the elastic interlocking structure 21 to complete the locking. A specific structure for guiding the elastic interlocking structure 21 is installed on one side of the locking buckle 22; this structure is the interlocking groove 222. The contour of the interlocking groove 222 is designed to be arc-shaped, the purpose of which is to optimize the guiding process of the elastic interlocking structure 21 within it, ensuring that the interlocking action smoothly transitions to the predetermined locking state. Since the protective frame 1 needs to ensure stability under various complex working conditions, the specific shape and position layout of the interlocking groove 222 play a key role in improving assembly efficiency. Specifically, the interlocking groove 222 does not open directly outwards, but is slightly inclined inwards; this design helps to further limit the angle range of the elastic interlocking structure 21 when it enters.

[0044] For example, the locking buckle 22 can be manufactured using injection molding, with the arc-shaped locking groove 222 pre-designed on a part of the main body of the locking buckle 22. Then, the locking buckle 22 is fixed to the edge of one protective plate 11 near the edge of another protective plate 11 using methods such as screwing, welding, or snap-fit ​​connection, with the locking groove 222 facing the direction of the elastic interlocking structure 21. During actual installation, the arc-shaped locking groove 222 can gradually disperse the applied force, thereby achieving stable and reliable guidance and locking action.

[0045] like Figure 1 As shown, in one embodiment, a further feature of the afforestation seedling protection device of this application is that the overall structure of the protective frame 1 is stabilized by a positioning pin 6. The soil stabilizing plate 4 is provided with a through hole 41 specifically for the positioning pin 6 to pass through. The positioning pin 6, by inserting into the through hole 41 and tightly bonding with the soil, fixes the soil stabilizing plate 4 at a specific position on the ground surface. This design prevents the soil stabilizing plate 4 from shifting due to changes in the external environment, and also provides a more reliable connection foundation for the support legs 3. The connection between the positioning pin 6 and the soil stabilizing plate 4 ensures an effective connection between the entire device and the ground, further enhancing the stability of the protective frame 1.

[0046] Specifically, the locating pin 6 is a detachable component, and its installation method determines the positional stability of the soil stabilizing plate 4 relative to the soil. The through holes 41 on the soil stabilizing plate 4 need to be adjusted in diameter and distribution according to actual application to accommodate locating pins 6 of different lengths or specifications, and to ensure that the locating pins 6 can pass smoothly and penetrate into the soil to a sufficient depth. The locating pin 6 and the through holes 41 adopt a clearance fit to facilitate convenient operation during actual installation while providing a stable fixing effect.

[0047] For example, when the device is needed, the planting location is first pre-selected on the ground. Then, using a hand tool, the positioning pin 6 is vertically pressed into the through hole 41, ensuring that its penetration depth reaches the predetermined level to effectively restrict the movement of the soil stabilizing plate 4. Specifically, a conical-headed positioning pin 6 can be selected to work with a straight cylindrical through hole 41 to optimize the technical details of the insertion process. This method effectively protects the environment surrounding the afforestation seedlings from a technical perspective and strengthens the integrated connection between the device and the ground.

[0048] like Figure 5 As shown, in one embodiment, the protective plate 11 of the afforestation seedling protection device of this application achieves a stable and flexible splicing method through a specific design. To ensure that multiple protective plates 11 can form a closed structure and enclose a polygonal shape, a connecting mechanism is formed by setting splicing blocks 111 and splicing grooves 112 on the protective plates 11. The specific mating positions of the splicing blocks 111 and the splicing grooves 112 are located between adjacent protective plates 11. This connection method is completed by inserting the splicing blocks 111 into the splicing grooves 112, thereby enabling multiple protective plates 11 to be accurately spliced ​​and positioned to form a stable protective frame 1 structure. Specifically, the internal shape of the splicing grooves 112 is adapted to the splicing blocks 111, so that the two can prevent misalignment and movement after being combined, ensuring that the overall shape remains stable.

[0049] For example, each protective panel 11 features a protruding splicing block 111 on one side, typically with a rectangular or semi-circular cross-section, while the other side has a corresponding splicing groove 112 for embedding into the structure. The depth of the splicing groove 112 matches the size of the splicing block 111. During installation, multiple protective panels 11 are tightly brought together and kept horizontally aligned through interlocking, ultimately forming a complete frame structure. This design also facilitates disassembly and reassembly, making it suitable for field applications.

[0050] like Figure 1 and Figure 5 As shown, in one embodiment, the protective plate 11 of the afforestation seedling protection device of this application has a perforated portion 113. The design of the perforated portion 113 ensures that the protective frame 1 has good ventilation and presents a more aesthetically pleasing overall structure, while not negatively affecting the basic function of the protective frame 1. By evenly distributing multiple perforated portions 113 on the protective plate 11, not only are functional requirements met, but the overall design aesthetics of the protective device are also further enhanced.

[0051] Specifically, the perforated portion 113 can exist in a specific shape and size at a designated location on each protective plate 11. To ensure the robustness and reliability of the overall protective structure, the perforated portion 113 is generally distributed in a location that does not interfere with the connection area of ​​the locking structure 2, thereby maintaining a stable connection between the various components of the device. In addition, the location of the perforated portion 113 and the part connected to the support leg 3 should also maintain an appropriate distance to avoid weakening the connection strength of the protective frame 1 to the structure below.

[0052] For example, the perforated portion 113 can be manufactured on the protective plate 11 using methods such as mechanical punching or laser cutting. This process allows for flexible adjustment of the shape and density distribution of the perforations to meet actual ventilation needs and aesthetic design requirements. Through reasonable parameter settings and processing technology, the functional positioning and structural layout of the perforated portion 113 on the protective plate 11 can be ultimately achieved.

[0053] In practical operation, when this device is used, the protective frame 1 can be placed around the afforestation seedlings. The shape of the protective frame 1 is fixed by bringing two protective plates 11 close together and connecting them using the locking structure 2. Then, the support leg 3 is connected to the bottom of the protective frame 1, and the other end of the support leg 3 is connected to the soil stabilizing plate 4, thus firmly fixing the entire device to the ground. In this state, the soil stabilizing plate 4 can compact the soil, reduce moisture evaporation, and prevent the protective frame 1 from tipping over due to external factors, thereby effectively protecting the afforestation seedlings.

[0054] 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 this application. 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 those different embodiments or examples.

[0055] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A protective device for afforestation seedlings, characterized in that, The utility model relates to a kind of protective frame and its locking structure, including: Protective frame (1) is surrounded by protective board (11) and is made into polygonal structure; Locking structure (2) is used to connect two groups of adjacent protective board (11) to fix the shape of protective frame (1), and the locking structure (2) includes elastic snap structure (21) and locking buckle (22), and the elastic snap structure (21) and locking buckle (22) are locked and matched with each other; Supporting leg (3) is connected with the bottom of protective frame (1) at one end, for supporting protective frame (1); Soil fixation plate (4) is used to reduce water evaporation and prevent protective frame (1) from toppling, and the other end of supporting leg (3) is connected with soil fixation plate (4);Wherein, The protective board (11) is provided with splicing block (111) and splicing groove (112), and the splicing block (111) is embedded in the splicing groove (112) of the adjacent protective board (11) when the protective board (11) is made into polygonal shape.

2. A device for protecting a nursery stock according to claim 1, wherein: The two ends of the supporting leg (3) are respectively hinged with the protective frame (1) and the soil fixation plate (4) to adjust the angle of the supporting leg (3) and the soil fixation plate (4).

3. A device for protecting a nursery stock according to claim 2, wherein: The supporting leg (3) is hinged with the protective frame (1) through bolt and nut assembly, and the angle of the supporting leg (3) can be locked and fixed through bolt and nut assembly.

4. A device for protecting a nursery stock according to claim 1, wherein: The elastic snap structure (21) includes handle (211) and locking rod (212), the elastic snap structure (21) is buckled or separated with locking buckle (22) by rotating handle (211) to make locking rod (212), spring (5) is sleeved on the locking rod (212) to enhance the buckling force of the locking rod (212) and the locking buckle (22), to prevent loosening caused by external force.

5. A device for protecting a nursery stock according to claim 4, wherein: The outer surface of the handle (211) is provided with a hand-gripping groove (211a) to facilitate manual tightening or unfastening action.

6. A device for protecting a nursery stock according to claim 1, wherein: The locking buckle (22) is provided with a buckling groove (222), and anti-slip tooth pattern (222a) is formed in the buckling groove (222) to increase the friction between the elastic snap structures (21).

7. A device for protecting a nursery stock according to claim 1, wherein: The locking buckle (22) is provided with a buckling groove (222), and the buckling groove (222) is arc-shaped to guide the elastic snap structure (21) to snap into the predetermined position.

8. A device for protecting a nursery stock according to claim 1, wherein: It also includes positioning pin (6), and the soil fixation plate (4) is provided with through hole (41), the positioning pin (6) is arranged in the through hole (41) and inserted into soil to fix the position of soil fixation plate (4).

9. A device for protecting a nursery stock according to claim 1, wherein: The protective board (11) is provided with a hollow part (113), and the protective frame (1) realizes ventilation through the hollow part (113) and is more beautiful.

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