Plant pollen screening device

Abstract

The embodiment of the utility model discloses a plant pollen screening device, and relates to the technical field of pollen screening, the plant pollen screening device comprises a screening tray, the screening tray comprises an inner tray and an outer tray, the inner tray is arranged in the outer tray in a sleeved mode, a plurality of mounting holes are formed in the edge of the top of the inner tray, the inner tray is connected with a storage plate through the mounting holes, and the storage plate is connected with the outer tray through the mounting holes. A clamping plate frame matched with the mounting hole is arranged on one side of the storage plate, the storage plate is inserted into the mounting hole through the clamping plate to be connected to the inner tray in a clamped mode, and the edge of the side, close to the screening tray, of the storage plate abuts against the edge of the top of the inner tray.

Description

Technical Field

[0001] This utility model relates to the field of pollen sieving technology, specifically a plant pollen sieving device and its accessories. Background Technology

[0002] In modern life, it is often necessary to screen various particulate materials. For example, pollen production has a specific workflow, starting with collecting pollen raw materials, drying them, then removing impurities, sieving, sterilizing, followed by cell wall breaking, mixing excipients, tableting, and secondary drying. During this production process, pollen is screened using a pollen screener to separate coarse and fine particles, allowing the fine particles to fall through the sieve holes into a collection box, thus achieving separation between the coarse and fine particles.

[0003] In related technologies, the inventors of this utility model have recognized that while some manual sieving devices can achieve the desired sieving purpose, the operator sometimes needs to temporarily place tools during the sieving process. For example, when pruning flowers, pollen, or hair-like substances, tools such as scissors and gloves need to be temporarily placed. Alternatively, due to the long and tedious nature of the process, operators may wish to place everyday items such as mobile phones and water cups on the sieving device to concentrate and improve work efficiency. However, due to the structural limitations of current sieving devices, there is no suitable place to place items such as manual tools and mobile phones. Utility Model Content

[0004] The present invention aims to overcome the shortcomings of the prior art by providing a plant pollen sieving device.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A plant pollen sieving device includes a sieving tray comprising an inner tray and an outer tray. The inner tray is fitted inside the outer tray, and the top edge of the inner tray covers the top edge of the outer tray. Multiple mounting holes are provided at the top edge of the inner tray, and a placement plate is connected to the inner tray through these mounting holes. A retaining plate adapted to the mounting holes is also provided on the side of the placement plate near the sieving tray. The placement plate is inserted into the mounting holes and secured to the inner tray via the retaining plate, and the edge of the placement plate near the sieving tray abuts against the top edge of the inner tray.

[0007] Optionally, a vertical opening slot is provided from the top of the inner tray near the outer edge, and a horizontal opening slot is provided from the inner wall of the inner tray near the inner edge of the top, extending outward to the vertical opening slot. The interior of the vertical opening slot and the interior of the horizontal opening slot are connected to form the mounting hole.

[0008] The card plate includes: a vertical base plate portion that protrudes from the bottom edge of the side of the placement plate near the sieving tray and extends downward, and a transverse snap-fit ​​portion formed by bending from the free end of the base plate portion in a direction outside the coverage area of ​​the horizontal projection surface of the placement plate.

[0009] When the card plate is engaged with the mounting hole, the horizontal engaging portion of the card plate is inserted into the horizontal opening groove and contacts the upper and lower groove walls of the horizontal opening groove, and the vertical base plate portion of the card plate is disposed in the vertical opening.

[0010] Optionally, the card plate further includes a limiting baffle portion formed by folding upward from the free end of the transverse snap-fit ​​portion. When the card plate is in the snap-fit ​​state with the mounting hole, the limiting baffle portion of the card plate extends from the horizontal opening groove toward the inner wall side of the inner tray.

[0011] Optionally, the inner tray has an outer rounded corner at the top outer edge, and the shelf has a stepped surface at the bottom edge on the side near the sieve tray. The turning point of the stepped surface has an inner rounded corner. When the card plate and the mounting hole are in a snap-fit ​​state, the stepped surface of the shelf abuts against the top outer edge of the inner tray, and the inner rounded corner of the stepped surface fits against the outer rounded corner.

[0012] Optionally, the bottom of the shelf is also connected to a detachable support frame, which includes two sets of support frames symmetrically arranged at the bottom of the shelf, with one end of each set of support frames away from the shelf fixedly connected to the side of the outer tray.

[0013] Optionally, the front of the sieving tray is a baffle extending upwards from the bottom, with a higher center and lower ends. A row of mounting holes for connecting a shelf is provided at the top edge of the back of the inner tray. The sieving tray is configured such that when placed on the user's lap, the front of the sieving tray contacts the user's waist. Generally, the shelf is installed directly opposite the user, i.e., on the back of the inner tray. This arrangement facilitates the user's access and allows them to view audio-visual equipment on the shelf while using the sieving device.

[0014] Optionally, the top edges of the left and right sides of the inner tray are each provided with a row of mounting holes for connecting the shelf. The mounting holes on the left and right sides of the inner tray are the same size as the mounting holes on the top edge of the back of the inner tray. This allows the shelf to be installed on the left or right front sides of the user (i.e., on both sides of the inner tray) as needed. This design improves the flexibility of the shelf and allows the user to flexibly install the shelf according to actual needs.

[0015] Optionally, the number of trays on one side of the shelf can be multiple.

[0016] Optionally, the shelf has a groove for mounting a support frame, and one end of the support frame has a snap-fit ​​structure that is embedded in the groove.

[0017] Optionally, a slot structure is provided on one side of the outer tray, and a locking block is provided on the side of the support frame away from the shelf, with the locking block embedded inside the slot structure.

[0018] Optionally, the bottom of the inner tray is provided with an installation opening, and a screen is installed at the installation opening. The screen is used to screen pollen. The bottom of the outer tray is sealed. A certain amount of receiving space is reserved between the bottom of the outer tray and the bottom of the inner tray. The screened pollen falls into the reserved gap, and the screened pollen can be removed by removing the inner tray fitted inside the outer tray.

[0019] Optionally, the bottom of the outer tray is sealed, and a receiving space is reserved between the inner bottom of the outer tray and the outer bottom of the inner tray.

[0020] Optionally, the outer tray is also provided with snap grooves on both sides.

[0021] Optionally, the bottom of the shelf is provided with multiple reinforcing ribs.

[0022] Optionally, the card plate has a width of 20-25mm, a thickness of 5mm-7mm, and a mounting hole width of 22mm-27mm.

[0023] Optionally, the overall thickness of the shelf is less than 20mm, so that the shelf can be placed in the storage space reserved between the inner bottom of the outer tray and the outer bottom of the inner tray.

[0024] Secondly, this utility model also provides a plant pollen sieving device, including a sieving tray, the sieving tray including an inner tray and an outer tray, the inner tray being sleeved inside the outer tray; characterized in that: a plurality of mounting holes are provided at the top edge of the outer tray, a placement plate is connected to the outer tray through the mounting holes, and a clamping plate adapted to the mounting holes is provided on the side of the placement plate near the sieving tray, the placement plate is inserted into the mounting holes and clamped onto the outer tray through the clamping plate, and the edge of the placement plate near the sieving tray abuts against the top edge of the outer tray.

[0025] Compared with existing technologies, this plant pollen sieving device has the following advantages:

[0026] This invention features mounting holes on the sieving tray for attaching a storage plate, facilitating the installation of the plate. This allows users to place items like mobile phones on the plate while sieving, solving the problem of having nowhere to put tools or phones during the sieving process. Furthermore, since sieving typically takes a considerable amount of time, the storage plate also allows users to place their phones on the tray to watch videos or listen to music, making the long sieving sessions less tedious. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the first embodiment of the plant pollen sieving device of this utility model.

[0029] Figure 2 This is a schematic diagram of the structure of an embodiment of the storage board of this utility model;

[0030] Figure 3 This is a schematic diagram of the installation structure of an embodiment of the storage board of this utility model;

[0031] Figure 4 This is a schematic diagram of the structure of one embodiment of the storage board of this utility model;

[0032] Figure 5 This is a schematic diagram of the structure of an embodiment of the inner tray of this utility model;

[0033] Figure 6 This is a structural schematic diagram of an embodiment of the buckle groove of this utility model;

[0034] Figure 7 This is a schematic diagram of the structure of an embodiment of the support frame of this utility model;

[0035] Figure 8 This is a schematic diagram of one embodiment of the card slot structure of this utility model;

[0036] Figure 9 This is a schematic diagram of another embodiment of the support frame of this utility model;

[0037] Figure 10 This is a structural schematic diagram of an embodiment of the reinforcing rib plate of this utility model;

[0038] Figure 11This is a schematic diagram of a usage scenario for the plant pollen sieving device of this utility model;

[0039] Figure 12 This is a schematic diagram of the structure of one embodiment of the screen of this utility model;

[0040] Figure 13 This is a schematic diagram of the connection structure between the storage board and the sieve tray of this utility model;

[0041] Figure 14 This is a partial schematic diagram of an embodiment of the display card structure of the storage board of this utility model;

[0042] Figure 15 This is a schematic diagram of the second embodiment of the plant pollen sieving device of this utility model.

[0043] 1. Screening tray; 101. Inner tray; 1011. Mounting opening; 1012. Screen; 1013. Accommodating stepped surface; 102. Outer tray; 1021. Slot structure; 1022. Clip groove; 2. Mounting hole; 3. Shelf; 301. Groove; 302. Reinforcing rib; 4. Clamping plate; 5. Support frame; 501. Clamping block; 502. Clamping structure. Detailed Implementation

[0044] 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.

[0045] First Embodiment

[0046] Please see Figures 1-12 As shown, this utility model provides a plant pollen sieving device, which is at least configured to prune the flowers of plants and perform pollen sieving operations so as to obtain separated pollen.

[0047] See Figure 1 In some embodiments, the screening device includes a screening tray 1, which includes an inner tray 101 and an outer tray 102. The inner tray 101 is fitted inside the outer tray 102, and the top edge of the inner tray 101 covers the top edge of the outer tray 102. A plurality of mounting holes 2 are provided at the top edge of the inner tray 101, and the spacing between the plurality of mounting holes 2 can be set to be the same to simplify the processing technology.

[0048] The inner tray 101 is connected to a shelf 3 via mounting holes 2. The shelf 3 is suspended outside the sieving tray 1 and is configured, for example, to hold tools or other items used for pruning plant stalks, pedestals, etc. The mounting holes 2 are designed to ensure that the shelf 3 is securely supported when receiving items, thus achieving a reliable connection. A retaining plate 4, adapted to the mounting holes 2, is provided on the side of the shelf 3 closest to the sieving tray 1. The shelf 3 is secured to the inner tray 101 by inserting the retaining plate 4 into the mounting holes 2, and the edge of the shelf 3 closest to the sieving tray 1 abuts against the top edge of the inner tray 101. This improves the reliability of the shelf 3's attachment to the sieving tray 1.

[0049] See Figure 13 and Figure 14 In some embodiments, a vertical opening slot 21 is provided from the top of the inner tray 101 near the outer edge, and a horizontal opening slot 22 is provided from the inner wall of the inner tray 101 near the inner edge of the top, extending outward to the vertical opening slot 21. The interior of the vertical opening slot 21 and the horizontal opening slot 22 are connected to form the mounting hole.

[0050] The card plate 4 can be made of a material with a certain degree of resilience, including: a vertical base plate portion 41 that protrudes from the bottom edge of one side of the storage plate 3 and extends downward, and a vertical base plate portion 42 formed by bending from the free end of the base plate portion in a direction outside the horizontal projection surface coverage of the storage plate 3.

[0051] When the card plate 4 is engaged with the mounting hole, the vertical base plate portion 42 of the card plate 4 is inserted into the horizontal opening groove 22 and contacts the upper and lower groove walls of the horizontal opening groove 22, and the vertical base plate portion 41 of the card plate 4 is disposed in the vertical opening.

[0052] See Figure 14Specifically, the card plate 4 further includes a limiting baffle portion 43 formed by folding upward from the free end of the vertical base plate portion 42. When the card plate 4 is in a snap-fit ​​state with the mounting hole, the limiting baffle portion 43 of the card plate 4 extends from the horizontal opening groove 22 toward the inner wall side of the inner tray 101. During installation, the placement plate 3 is first tilted at a certain angle toward the screening tray. The limiting and blocking plate part 43 of the clamping plate is first inserted downwards to the bottom along the vertical opening groove 21. Then, it is slowly rotated away from the screening tray 1 so that part of the horizontal clamping part 42 of the clamping plate 4 enters the horizontal opening groove. While flattening the placement plate 3, it is slowly pushed forward until the limiting and blocking plate part 43 of the clamping plate 4 extends out of the horizontal opening groove. In the event of vibration or the entire screening device being inverted, during the process of the clamping plate accidentally coming out of the mounting hole away from the screening tray, part of the inner top edge of the limiting and blocking part comes into contact with the opening surface of the horizontal opening groove and interferes. This avoids the risk that the clamping plate of the placement plate may accidentally come out of the mounting hole, thereby enhancing the reliability of the clamping installation.

[0053] Understandably, to facilitate the installation and removal of pallets, the entire pallet can be made of a material with slight resilience, such as ABS, PP, PC, PET and other plastics, or it can be made of spring steel, aluminum alloy and other materials.

[0054] In some embodiments, when the card plate 4 is inserted into the mounting hole, the transverse locking part 42 inside the card plate 4 contacts the upper and lower groove walls of the horizontal opening groove in the mounting hole to lock it. The width of the card plate is generally 20-25mm, the thickness is 5mm-7mm, the width of the mounting hole is 22mm-27mm, and there are multiple card plates 4. The spacing between the multiple card plates is also the same, and the spacing between them and the mounting hole 2 is the same, so that the card plate 4 can be easily inserted into the inside of the mounting hole 2.

[0055] See Figure 13 The inner tray 101 has an outer rounded corner at the top outer edge, and the bottom edge of the shelf near the sieve tray has a stepped surface 31 with an inner rounded corner at the turning point of the stepped surface. When the clamping plate 4 and the mounting hole 2 are in a snap-fit ​​state, the stepped surface 31 of the shelf 3 abuts against the top outer edge of the inner tray 101, and the inner rounded corner of the stepped surface 31 fits against the outer rounded corner.

[0056] In some embodiments, a detachable support frame 5 is also connected to the bottom of the shelf 3. The support frame 5 includes two sets of support frames symmetrically arranged at the bottom of the shelf. The end of each set of support frames 5 away from the shelf is fixedly connected to the side of the outer tray 102. In other words, the end away from the shelf 3 abuts against one side of the outer tray 102, one end of the support frame 5 contacts the shelf 3, and the other end contacts the plant sorting tray 1, which enhances stability and makes the shelf 3 easy to disassemble, facilitating storage and changing the installation position.

[0057] In this embodiment, the purpose of installing the storage plate 3 on the sieving tray 1 is to allow users to place items such as mobile phones on the storage plate 3 while the sieving work is being carried out. This solves the problem of where to place items such as gloves, scissors, and mobile phones during the sieving process. Furthermore, since the sieving work usually takes a long time, the storage plate 3 also allows users to use their mobile phones, watch videos, or listen to music while sieving, making the long sieving time less tedious.

[0058] In some embodiments, the front of the sieving tray 1 of the device is a baffle shape that extends from the bottom upwards, with a high center and low ends.

[0059] Meanwhile, in order to facilitate flexible use as needed, in some embodiments, a row of mounting holes 2 for connecting the shelf can be provided at the top edge of the back of the inner tray 101. The sieve tray 1 is configured to be placed on the user's lap and the front of the sieve tray 1 is in contact with the user's waist. A row of mounting holes 2 for connecting the shelf is provided at the top edge of the back of the inner tray 101. When the shelf 3 is installed here, it can be placed directly in front of the user, which makes it convenient for the user to look down at the mobile phone on the shelf 3.

[0060] In some embodiments, a row of mounting holes 2 for connecting a shelf can be provided on the top edges of the left and right sides of the inner tray 101, respectively. The mounting holes 2 on the left and right sides of the inner tray 101 are the same size as the mounting holes 2 on the top edge of the back of the inner tray 101. This allows the shelf 3 to be placed on the left or right side of the inner tray 101, thereby facilitating flexible use by the user and improving the flexibility of the device.

[0061] In some embodiments, the number of clamping plates 4 on one side of the shelf 3 in this invention is multiple. The clamping plates 4 are L-shaped and are embedded in the mounting holes 2. As shown in the figure, there are preferably four clamping plates 4. Correspondingly, there are also four mounting holes on each side. The four clamping plates 4 can securely fix the shelf 3. The shelf 3 has a groove 301 for mounting the support frame 5. One end of the support frame 5 is provided with a snap-fit ​​structure 502, which is embedded in the groove 301. The above structure allows the support frame 5 and the shelf 3 to be snap-fitted together and is easy to disassemble and put away, thereby improving the flexibility of the device.

[0062] Please also refer to the following: Figure 8 and Figure 9 The outer tray 102 has a slot structure 1021 on one side, and the support frame 5 has a block 501 on the side away from the shelf 3. The block 501 is embedded in the slot structure 1021 and can slide inside the slot structure 1021. The slot structure 1021 makes one end of the block 501 of the support frame 5 more firmly abut against the outer wall of the outer tray 102, preventing it from sliding left and right, thereby effectively improving the support stability of the support frame 5.

[0063] The bottom of the inner tray 101 is provided with an installation opening 1011, and a threaded mounting hole is provided at the installation opening 1011. A screen 1012 is installed at the installation opening 1011, and a fixing bolt is passed through the screen 1012. The fixing bolt allows the screen 1012 to be easily and detachably installed at the installation opening 1011. The detachable screen 1012 makes it easy to replace and maintain, improving the flexibility of the equipment. The screen 1012 is used to screen pollen. The bottom of the outer tray 102 is sealed. A certain height gap is reserved between the inner bottom of the outer tray 102 and the outer bottom of the inner tray 101. The gap is used to form a receiving space. The sieved pollen falls into the receiving space, and the sieved pollen can be removed by removing the inner tray fitted inside the outer tray. In some embodiments, the overall thickness of the shelf is less than 20mm, and the height of the receiving space is greater than 30mm, so that the shelf can be easily placed in the receiving space reserved between the inner bottom of the outer tray and the outer bottom of the inner tray.

[0064] Of course, in some embodiments, the screen 1012 can also be installed at the mounting opening 1011 in other detachable ways, such as... Figure 12As shown, the screen 1012 is installed by placing the periphery of the screen onto the receiving step surface 1013 at the installation opening. Specifically, the periphery of the screen is provided with a ferromagnetic layer, and the receiving step surface 1013 is provided with a magnetic layer to facilitate the installation and positioning of the screen. Furthermore, when the screen is placed on the receiving step surface, it can be firmly attracted together, achieving reliable installation of the screen.

[0065] Specifically, the sieve 1012 is used to screen pollen. The bottom of the outer tray 102 is sealed. A certain amount of receiving space is reserved between the bottom of the outer tray 102 and the bottom of the inner tray 101. The sieved pollen falls into the reserved receiving space. The sieved pollen can be removed by removing the inner tray 101 that is fitted inside the outer tray 102.

[0066] In one embodiment, the mesh openings of the screen 1012 can be circular, elliptical, rhomboid, or irregularly shaped. The screen 1012 can be made of a rigid, lightweight material, such as aluminum alloy, polytetrafluoroethylene, wood, acrylic sheet (PMMA or plexiglass), etc.

[0067] Please refer to the following carefully. Figure 4 and Figure 11 The state diagram of the device in use is shown in Figure 11. The sieving tray 1 is placed on the user's lap, with the front of the sieving tray 1 in contact with the user's waist. The back of the inner tray 101 is provided with a row of mounting holes 2 for connecting the shelf 3. The shelf 3 is mostly installed in the position facing the user (that is, the back of the inner tray 101). This arrangement makes it convenient for the user to pick up and view the mobile phone on the shelf 3.

[0068] Please refer to the following carefully. Figure 1 and Figure 6 The inner tray 101 has a row of mounting holes 2 on each of its left and right sides for connecting the shelf 3, so that the shelf 3 can also be installed on the left or right front sides of the user (that is, on both sides of the inner tray 101). This setting improves the flexibility of the shelf 3 and makes it convenient for the user to flexibly install the shelf 3 according to actual needs, further improving the practicality of the device. Both the inner tray 101 and the outer tray 102 have snap grooves 1022 on both sides. The snap grooves 1022 make it convenient for staff to pick up, move or disassemble the inner tray 101 and the outer tray 102.

[0069] Please refer to the following carefully. Figure 10 The bottom of the shelf 3 is provided with multiple reinforcing ribs 302. The reinforcing ribs 302 can enhance the structural strength of the shelf 3 and improve the practicality of the device.

[0070] As an application example, in the scenario of plant pollen sieving, during the pollen sieving process, the collected flowers need to be placed on the lap and the stigma, stigma, and pollen in the stigma need to be trimmed with scissors. In specific use, the operator first installs two support frames 5 onto the shelf 3, and then inserts the shelf 3 into the plant sieving tray 1. The purpose of installing the shelf 3 on the sieving tray 1 is to allow the user to place items such as mobile phones on the shelf 3 while sieving, solving the problem of where to put gloves, scissors, mobile phones, etc. during sieving. Moreover, since sieving usually takes a long time, the shelf 3 also allows the user to check their mobile phone while trimming, making the long sieving time less tedious.

[0071] Example 2

[0072] See Figure 14 and Figure 15 A plant pollen sieving device includes a sieving tray, which comprises an inner tray 101 and an outer tray 102. The inner tray 101 is fitted inside the outer tray 102. The top edge of the outer tray 102 has multiple mounting holes 2. A placement plate 3 is connected to the outer tray 102 through the mounting holes 2. A retaining plate adapted to the mounting holes 2 is also provided on the side of the placement plate 3 near the sieving tray. The placement plate 3 is inserted into the mounting holes 2 and secured to the outer tray 102 through the retaining plate. The edge of the placement plate 3 near the sieving tray abuts against the top edge of the outer tray 102.

[0073] In some embodiments, the top edge of the inner tray 101 is substantially flush with the inner edge of the top of the outer tray 102.

[0074] In other embodiments, the outer edge of the top of the inner tray 101 partially covers the inner edge of the top of the outer tray 102, and the outer edge of the outer tray 102 is partially exposed, with the mounting hole 2 located on the exposed portion of the outer edge of the outer tray 102.

[0075] In some embodiments, the top edge of the inner tray 101 is positioned below the inner edge of the top of the outer tray 102.

[0076] In summary, this utility model, by providing mounting holes on the sieving tray for connecting a storage plate, facilitates the installation of the storage plate. By installing the storage plate through these holes, items such as mobile phones can be placed on the storage plate while sieving, solving the problem of having nowhere to place tools or mobile phones during sieving. Furthermore, since sieving typically takes a considerable amount of time, the storage plate also allows users to use their mobile phones, watch videos, or listen to music while sieving, making the long sieving process less tedious.

[0077] 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 process, method, article, or apparatus.

[0078] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plant pollen sieving device, comprising a sieving tray, the sieving tray including an inner tray and an outer tray, the inner tray being fitted inside the outer tray, and the top edge of the inner tray covering the top edge of the outer tray; characterized in that: The inner tray has multiple mounting holes at its top edge. A shelf is connected to the inner tray through the mounting holes. A clip adapted to the mounting holes is also provided on the side of the shelf near the screening tray. The shelf is inserted into the mounting holes and secured to the inner tray by the clip. The edge of the shelf near the screening tray abuts against the top edge of the inner tray.

2. The plant pollen sieving device according to claim 1, characterized in that: A vertical opening slot is provided at the top of the inner tray near the outer edge, and a horizontal opening slot is provided on the inner wall of the inner tray near the inner edge of the top, extending outward to the vertical opening slot. The interior of the vertical opening slot and the horizontal opening slot are connected to form the mounting hole. The card plate includes: a vertical base plate portion that protrudes from the bottom edge of one side of the shelf and extends downward, and a transverse latching portion formed by bending from the free end of the base plate portion in a direction outside the coverage area of ​​the horizontal projection surface of the shelf. When the card plate is engaged with the mounting hole, the horizontal engaging portion of the card plate is inserted into the horizontal opening groove and contacts the upper and lower groove walls of the horizontal opening groove, and the vertical base plate portion of the card plate is disposed in the vertical opening.

3. The plant pollen sieving device according to claim 2, characterized in that: The card plate further includes a limiting baffle portion formed by folding upward from the free end of the transverse snap-fit ​​portion. When the card plate and the mounting hole are in the snap-fit ​​state, the limiting baffle portion of the card plate extends from the horizontal opening groove toward the inner wall side of the inner tray.

4. The plant pollen sieving device according to claim 1, characterized in that: The inner tray has an outer rounded corner at the top outer edge, and the shelf has a stepped surface at the bottom edge on the side near the sieve tray. The turning point of the stepped surface has an inner rounded corner. When the card plate and the mounting hole are in the snap-fit ​​state, the stepped surface of the shelf abuts against the top outer edge of the inner tray, and the inner rounded corner of the stepped surface fits against the outer rounded corner.

5. The plant pollen sieving device according to claim 1, characterized in that: The bottom of the shelf is also connected to a detachable support frame, which includes two sets of support frames symmetrically arranged at the bottom of the shelf. The end of each set of support frames away from the shelf is fixedly connected to the side of the outer tray.

6. The plant pollen sieving device according to claim 1, characterized in that: The front of the sieving tray is a baffle that extends from the bottom upwards, with a high middle and low ends. The top edge of the back of the inner tray is provided with a row of mounting holes for connecting the shelf. The sieving tray is configured so that when it is placed on the user's lap, the front of the sieving tray contacts the user's waist.

7. A plant pollen sieving device, characterized in that: The device includes a screening tray, comprising an inner tray and an outer tray, with the inner tray nested inside the outer tray. The outer tray has multiple mounting holes at its top edge, through which a shelf is connected. The shelf, near the screening tray, has a locking plate adapted to the mounting holes. The shelf is inserted into the mounting holes and secured to the outer tray by the locking plate, with the edge of the shelf near the screening tray abutting against the top edge of the outer tray.

8. The plant pollen sieving device according to claim 7, characterized in that: The top edge of the inner tray is approximately flush with the inner edge of the top of the outer tray.

9. The plant pollen sieving device according to claim 7, characterized in that: The outer edge of the top of the inner tray partially covers the inner edge of the top of the outer tray, and the outer edge of the outer tray is partially exposed. The mounting hole is located on the exposed portion of the outer edge of the outer tray.

10. The plant pollen sieving device according to claim 7, characterized in that: The top edge of the inner tray is set lower than the inner edge of the top of the outer tray.

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