A folding cage
Patent Information
- Application Number
- CN202522278653.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-28
- Publication Date
- 2026-09-11
- Estimated Expiration
- 2035-10-28
AI Technical Summary
[0004]而灭菌器的内室空间和容积有限,单次盛放的笼具数量较少,当试验使用笼具数量较大时,部分笼具将无法及时消毒,影响试验的再次进行,即影响试验的效率;而且,在消毒时笼具内部空间,无法有效利用,造成灭菌器的有效利用率不高
[0030]通过前壁总成和后壁总成内设置折叠结构,使前壁总成和后壁总成能够横向折叠,以缩减两个侧壁总成的间距;
Smart Images

Figure CN224734449U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of biosafety protection equipment technology, and more specifically, to a folding cage. Background Technology
[0002] During animal testing, animals must be housed in cages in isolators, and the cages must be cleaned and disinfected after each test to avoid interference between different tests and ensure the accuracy of the test results.
[0003] Traditional cages are mostly fixed structures and are relatively large in size, taking up a lot of space;
[0004] However, the internal space and volume of the sterilizer are limited, and the number of cages that can be held at one time is relatively small. When a large number of cages are used in the experiment, some cages will not be able to be sterilized in time, which will affect the re-conduct of the experiment and thus affect the efficiency of the experiment. Moreover, the internal space of the cages cannot be effectively utilized during sterilization, resulting in a low effective utilization rate of the sterilizer.
[0005] In conclusion, how to solve the problem of cages not being able to be disinfected in a timely manner due to the limited volume of sterilizers is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0006] In view of this, the purpose of this utility model is to provide a foldable cage with a foldable design to reduce its space occupation and thereby increase the capacity of the cage in the sterilizer during disinfection, that is, to ensure that the cage can be quickly disinfected.
[0007] To achieve the above objectives, this utility model provides the following technical solution:
[0008] A folding cage includes a front wall assembly, a rear wall assembly, and two side wall assemblies that are connected sequentially and form a closed loop structure.
[0009] Both the front wall assembly and the rear wall assembly include a folding structure to reduce the distance between the two side wall assemblies;
[0010] It also includes a top wall assembly and a bottom wall assembly that are detachably connected and fixed to the two side wall assemblies.
[0011] Preferably, the folding structure includes a hinged first folding assembly and a second folding assembly, the first folding assembly being hinged to one of the sidewall assemblies and the second folding assembly being hinged to the other sidewall assembly.
[0012] Preferably, the front wall assembly further includes a detachable and fixed welding assembly for sealing the area corresponding to the front wall assembly in the unfolded state of the folded structure.
[0013] Preferably, the front wall assembly further includes a fourth guide assembly fixed relative to the side wall assembly;
[0014] When the folded structure is fully unfolded, the welding assembly can slide and insert along one end of the fourth guide assembly;
[0015] The front wall assembly also includes a fourth locking assembly for locking the relative positions of the welding assembly and the fourth guide assembly.
[0016] Preferably, the welding assembly includes a door body and / or several accessory fixing assemblies;
[0017] The door can be opened and connects to the internal space formed by the top wall assembly, the side wall assembly, the bottom wall assembly, the front wall assembly, and the rear wall assembly;
[0018] The attachment fixing component is used to fix the attachments required for feeding.
[0019] Preferably, the rear wall assembly further includes an extrusion plate assembly, which is movably disposed relative to the folding structure, and the direction of relative movement is the same as the normal direction of the rear wall assembly;
[0020] The extrusion plate assembly is used to divide the internal space formed by the top wall assembly, the side wall assembly, the bottom wall assembly, the front wall assembly, and the rear wall assembly.
[0021] Preferably, the extrusion plate assembly includes two independent extrusion plate components, each of which includes a hinged flip plate and a sliding plate. The sliding plate is slidably mounted to the corresponding side wall assembly, and the sliding direction is the same as the normal direction of the rear wall assembly.
[0022] The flip plate has a connecting part on the side away from the sliding plate for connecting the two extrusion plate assemblies.
[0023] Preferably, both ends of the sidewall assembly are provided with vertical extension walls;
[0024] When the flip plate is flipped relative to the sliding plate to a set angle, the flip plate can be accommodated within the space enclosed by the side wall assembly and the vertical extension wall.
[0025] Preferably, the sidewall assembly further includes a first guide component, and the bottom wall assembly is slidably inserted along one end of the first guide component;
[0026] The bottom wall assembly also includes a second locking component for locking the relative position of the bottom wall assembly and the side wall assembly.
[0027] Preferably, the bottom wall is a mesh plate;
[0028] A receiving plate is provided below the bottom wall assembly, and the receiving plate is slidably installed relative to the bottom wall assembly.
[0029] The folding cage provided by this utility model has at least the following advantages compared with the prior art:
[0030] By incorporating folding structures within the front and rear wall assemblies, the front and rear wall assemblies can be folded laterally to reduce the distance between the two side wall assemblies.
[0031] Meanwhile, the use of detachable top and bottom wall assemblies avoids interference between the top and bottom wall assemblies and the front and rear wall assemblies when they are folded or the distance between the two side wall assemblies is reduced. This reduces the space occupied by the folded cages without changing the cage volume, allowing the sterilizer to accommodate more cages while maintaining a fixed volume. This improves the sterilization efficiency of the cages and reduces the waste of internal space during sterilization, thus increasing the effective utilization rate of the sterilizer. Attached Figure Description
[0032] 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0033] Figure 1 A schematic diagram of the specific folding cage provided by this utility model;
[0034] Figure 2 This is a schematic diagram of the structure of the back of the specific folding cage provided by this utility model;
[0035] Figure 3 A structural schematic diagram of the specific sidewall assembly and extrusion plate assembly provided by this utility model;
[0036] Figure 4 This is a schematic diagram of the specific welding assembly provided by this utility model;
[0037] Figure 5 A schematic diagram of the structure of the folding cage provided by this utility model when disassembling the receiving plate;
[0038] Figure 6 This is a structural diagram illustrating the disassembly of the top wall assembly of the specific folding cage provided by this utility model.
[0039] Figure 7 This is a structural diagram illustrating the disassembly and welding assembly of the specific folding cage provided by this utility model.
[0040] Figure 8 This is a structural diagram illustrating the disassembly of the bottom wall assembly of the specific folding cage provided by this utility model.
[0041] Figure 9 This is a schematic diagram of the front wall assembly and rear wall assembly of the specific folding cage provided by this utility model when folded.
[0042] Figure 10 This is a schematic diagram of the structure of the front wall assembly and the rear wall assembly of the specific folding cage provided by this utility model after folding.
[0043] Figure 11 This is a schematic diagram of the structure of the folded cage provided by this utility model when it is placed in a sterilizer after being folded.
[0044] In the picture:
[0045] 1. Top wall assembly; 11. First locking assembly;
[0046] 2. Sidewall assembly; 21. Vertical extension wall;
[0047] 3. Bottom wall assembly; 31. First guide assembly; 32. Second locking assembly; 33. Second guide assembly; 34. Third guide assembly;
[0048] 4. Front wall assembly; 41. Welded assembly; 411. Door body; 412. Third locking assembly; 413. Fourth locking assembly; 414. Drinking equipment fixing assembly; 415. Feeding equipment fixing assembly; 416. Stop bar; 42. Fourth guide assembly;
[0049] 5. Rear wall assembly; 51. Extrusion plate assembly; 511. Flip plate; 512. Sliding plate; 513. Connecting part; 52. Fifth guide assembly; 53. Drive assembly; 54. Fifth locking assembly;
[0050] 6. Receiving tray; 7. Drinking water equipment; 8. Feeding equipment. Detailed Implementation
[0051] 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.
[0052] The core of this utility model is to provide a foldable cage with a foldable design to reduce its space occupation, thereby increasing the capacity of the cage in the sterilizer during disinfection, thus ensuring that the cage can be quickly disinfected.
[0053] Please refer to Figures 1-4 A folding cage includes a front wall assembly 4, a rear wall assembly 5, and two side wall assemblies 2 that are connected in sequence and form a closed loop structure.
[0054] Both the front wall assembly 4 and the rear wall assembly 5 include folding structures to reduce the distance between the two side wall assemblies 2;
[0055] It also includes a top wall assembly 1 and a bottom wall assembly 3 that are detachably connected and fixed to the two side wall assemblies 2.
[0056] like Figure 9 As shown, both the front wall assembly 4 and the rear wall assembly 5 include folding structures that can fold inwards or outwards, reducing the distance between the side wall assemblies at both ends. This laterally compresses the internal space of the cage, reducing its space occupation and making it more suitable for sterilization. Figure 11 As shown, it can accommodate a larger number of cages.
[0057] like Figure 6 and Figure 7 As shown, a detachable top wall assembly 1 and bottom wall assembly 3 are adopted. The top wall assembly 1 is provided with a first locking component 11 at each of its four corners for fixed connection with the top of the corresponding side wall assembly 2. The first locking component 11 preferably adopts a pin structure, which has high disassembly flexibility compared with bolt connection and can quickly complete the disassembly and installation of the top wall assembly 1 and the side wall assembly 2.
[0058] The bottom wall assembly 3 is disassembled or installed by inserting it into the bottom of the side wall assembly 2 with a first guide component 31. The first guide component 31 preferably has a sliding groove structure design, in which the bottom wall assembly 3 slides and engages in the sliding groove, which can effectively improve the load-bearing capacity of the bottom wall assembly 3. The bottom wall assembly 3 also includes a second locking component 32. After the bottom wall assembly 3 and the first guide component 31 are inserted, the second locking component 32 can lock the bottom wall assembly 3 and the side wall assembly 2, preventing the bottom wall assembly 3 from separating from the side wall assembly 2.
[0059] Furthermore, after the top wall assembly 1 and the bottom wall assembly 3 are fixedly installed with the side wall assemblies 2 at both ends, they fix the side wall assemblies 2 at both ends, restricting the folding structure of the front wall assembly 4 and the rear wall assembly 5, thus ensuring the structural stability of the folding cage in use.
[0060] In some embodiments, the top wall assembly 1 is fixed by the same insertion method as the bottom wall assembly 3, while the bottom wall assembly 3 is fixed by the same pin fixing method as the top wall assembly 1, which can achieve the same effect.
[0061] In some embodiments, the folding structure includes a hinged first folding assembly and a second folding assembly, the first folding assembly being hinged to one of the sidewall assemblies 2 and the second folding assembly being hinged to the other sidewall assembly 2.
[0062] like Figure 9 As shown, the folding structure uses two sets of hinged folding components, and the two sets of folding components are respectively hinged to the side wall assembly 2 on the corresponding side. When the folding cage is folded, the two sets of folding components fold inward, thereby compressing the internal space of the cage.
[0063] In some embodiments, the folding structure uses a flexible material, such as a bandage or other material that can be compressed laterally, to connect the two end sidewall assemblies 2, which can also achieve the above-mentioned effect.
[0064] In some embodiments, the front wall assembly 4 further includes a detachably fixed welding assembly 41 for closing the area corresponding to the front wall assembly 4 in the unfolded state of the folded structure.
[0065] like Figure 1 and Figure 7 As shown, the front wall assembly 4 also includes a welding assembly 41, which supports the folding structure to prevent the folding structure of the front wall assembly 4 from folding during the use of the cage, thereby further ensuring the structural stability of the cage during use.
[0066] Meanwhile, the welding assembly 41 adopts a detachable structural design, which makes it easy to remove the support restrictions on the folding structure when disinfecting the cage.
[0067] In some embodiments, the front wall assembly 4 further includes a fourth guide assembly 42 fixed relative to the side wall assembly 2;
[0068] When the folded structure is fully unfolded, the welding assembly 41 can slide and insert along one end of the fourth guide assembly 42;
[0069] The front wall assembly 4 also includes a fourth locking assembly 413 for locking the relative positions of the weld assembly 41 and the fourth guide assembly 42.
[0070] like Figure 7 As shown, the fourth guide component 42 is fixedly connected to the side wall assemblies 2 at both ends, and the fourth guide component 42 adopts a single-end open groove structure, such as a top opening, so that the welding assembly 41 can be inserted into the top opening of the groove, and the side wall of the groove can restrict the back and forth movement of the welding assembly 41, thereby achieving support for the folded structure inside the front wall assembly 4.
[0071] Meanwhile, the front wall assembly 4 also includes a fourth locking component 413, which limits the installed welded assembly 41 to prevent animals kept inside from opening the welded assembly 41 on their own.
[0072] The fourth locking component 413 is preferably a pin structure or a tightening bolt. The tightening bolt is connected to the welding assembly 41 by a thread, and the end of the tightening bolt abuts against the end face of the folded structure inside the front wall assembly 4. By rotating the tightening bolt, the positive pressure between the welding assembly 41 and the side wall of the slide is increased, that is, the friction between the welding assembly 41 and the fourth guide component 42 is increased, thereby achieving the limiting and locking of the welding assembly 41.
[0073] In some embodiments, the welding assembly 41 includes a door body 411 and / or several accessory fixing assemblies;
[0074] The door 411 can be opened and connects to the internal space composed of the top wall assembly 1, the side wall assembly 2, the bottom wall assembly 3, the front wall assembly 4, and the rear wall assembly 5;
[0075] The attachment fixing components are used to fix the attachments needed for feeding.
[0076] like Figure 4 As shown, by setting a movable and openable door 411, it is convenient to take animals out of the cage. The door 411 is preferably installed by sliding up and down. A third locking component 412 is set between the door 411 and the welding assembly 41 to limit the door 411 in the open and closed states, respectively, so as to facilitate the operation of taking out animals.
[0077] At the same time, such as Figure 1 and Figure 4 As shown, an accessory fixing component is provided on the welding assembly 41. The accessory fixing component includes a drinking equipment fixing component 414 and a feeding equipment fixing component 415, which facilitates the fixing of the drinking equipment 7 and the feeding equipment 8, that is, fixing the drinking equipment 7 and the feeding equipment 8 to the front wall assembly 4, so that the user can feed them.
[0078] In some embodiments, the rear wall assembly 5 further includes an extrusion plate assembly, which is disposed relative to the folding structure, and the direction of relative movement is the same as the normal direction of the rear wall assembly 5.
[0079] The extrusion plate assembly is used to divide the internal space consisting of the top wall assembly 1, side wall assembly 2, bottom wall assembly 3, front wall assembly 4, and rear wall assembly 5.
[0080] like Figure 3 and Figure 8 As shown, the squeezing plate assembly can move within the cage along the normal direction of the rear wall assembly 5, dividing the space inside the cage. A drive assembly 53 is provided to drive the squeezing plate assembly. If an animal is placed in front of the squeezing plate assembly, the squeezing plate assembly can be driven to move forward, thereby driving the animal forward and making it easier for the user to pick up and put down the animal through the opening of the door 411.
[0081] Moreover, the extrusion plate assembly can cover or seal the area corresponding to the rear wall assembly 5 after the folded structure is unfolded. Therefore, the rear wall assembly 5 can adopt a frame design during the design process, thereby improving the lightweight of the cage.
[0082] The drive assembly 53 preferably has a traction rod, which extends to the outside of the front wall assembly 4, allowing the user to directly drive the movement of the compression plate assembly from outside the cage.
[0083] Meanwhile, a fifth locking assembly 54 is provided on the outside of the side wall assembly 2 or the front wall assembly 4 to lock the traction rod, thereby locking the position of the compression plate assembly inside the cage.
[0084] In some embodiments, the extrusion plate assembly includes two independent extrusion plate assemblies 51, each extrusion plate assembly 51 including a hinged flip plate 511 and a sliding plate 512, the sliding plate 512 being slidably mounted to the side wall assembly 2 on the corresponding side, and the sliding direction being the same as the normal direction of the rear wall assembly 5.
[0085] A connecting part 513 is provided on the side of the flip plate 511 away from the sliding plate 512 for connecting the two extrusion plate assemblies 51 to each other.
[0086] like Figure 3 and Figure 8 As shown, the extrusion plate assembly is made up of two sets of extrusion plate components 51 spliced together. The two extrusion plate components 51 are connected by a connecting part 513 and combined into a flat plate, which can support and limit the folding structure inside the rear wall assembly 5, and prevent the folding structure of the rear wall assembly 5 from folding during use, thus ensuring the stability of the cage during use.
[0087] Each extrusion plate assembly 51 is installed in conjunction with the corresponding side wall assembly 2. When the cage needs to be folded, the flip plate 511 rotates relative to the sliding plate 512, making the flip plate 511 parallel to the plane of the side wall assembly 2, thereby releasing the support restriction of the extrusion plate assembly on the folding structure inside the rear wall assembly 5.
[0088] like Figure 3 As shown, a fifth guide component 52 is provided on the inner wall of the side wall assembly 2, and the sliding plate 512 is slidably installed with the fifth guide component 52, thereby improving the stability of the movement trajectory of the extrusion plate assembly 51 in the cage.
[0089] In some embodiments, vertical extension walls 21 are provided at both ends of the sidewall assembly 2;
[0090] When the flip plate 511 is flipped relative to the sliding plate 512 to a set angle, the flip plate 511 can be accommodated in the space enclosed by the side wall assembly 2 and the vertical extension wall 21.
[0091] like Figure 3 and Figure 8 As shown, by providing vertical extension walls 21 at both ends of the side wall assembly 2, the side wall assembly 2 is made into a C-shaped structure with an internal enclosed space. When the flip plate 511 flips relative to the sliding plate 512, the flip plate 511 can be accommodated in the enclosed space of the side wall assembly 2, thereby avoiding damage to the compression plate assembly 51 when the cage is folded.
[0092] In some embodiments, the sidewall assembly 2 further includes a first guide component 31, and the bottom wall assembly 3 can be slidably inserted along one end of the first guide component 31;
[0093] The bottom wall assembly 3 also includes a second locking component 32 for locking the relative position of the bottom wall assembly 3 and the side wall assembly 2.
[0094] like Figure 3 and Figure 8 As shown, a first guide component 31 is provided at the bottom of the inner wall of the side wall assembly 2 for insertion into the bottom wall assembly 3, so that the bottom wall assembly 3 can be detachably connected to the side wall assembly 2. The first guide component 31 is preferably a guide mechanism such as a slide or guide rail.
[0095] Meanwhile, a second locking component 32 is provided at the lower end of the side wall assembly 2. After the bottom wall assembly 3 is installed, the second locking component 32 can limit and lock the bottom wall assembly 3 to prevent the bottom wall assembly 3 from separating from the side wall assembly 2 during the use of the cage, thus ensuring the structural stability of the cage during use.
[0096] In some embodiments, the welding assembly 41 is inserted and fixed from top to bottom, while the bottom wall assembly 3 is inserted and fixed from front to back. Therefore, a stop bar 416 is provided at the bottom of the welding assembly 41. After the welding assembly 41 is inserted, the stop bar 416 is in the path of the bottom wall assembly 3 being pulled out, which restricts the separation of the bottom wall assembly 3 and the side wall assembly 2, further ensuring the structural stability of the cage during use.
[0097] In some embodiments, the bottom wall assembly 3 is a mesh panel;
[0098] A receiving plate 6 is provided below the bottom wall assembly 3, and the receiving plate 6 is slidably installed relative to the bottom wall assembly 3.
[0099] like Figure 1 and Figure 5 As shown, a second guide component 33 is provided at the bottom of the inner wall of the side wall assembly 2, which facilitates the insertion and installation of the receiving plate 6 below the bottom wall assembly 3. Therefore, the bottom wall assembly 3 combined with the mesh structure allows animal feces inside the cage to be received by the receiving plate 6 through the mesh, and the animal feces inside the cage can be cleaned by removing the receiving plate 6.
[0100] In some embodiments, a third guide component 34 is also provided at the bottom of the bottom wall assembly 3. The third guide component 34 is used in combination with the second guide component 33 to divide the corresponding area of the bottom wall assembly 3 into several areas. Each area is provided with a separate plug-in fixed receiving plate 6 to achieve regional cleaning of animal feces.
[0101] like Figures 5-10 As shown, when folding the cage, the sequence is as follows: remove the bottom receiving plate 6, remove the top wall assembly 1, pull upward to remove the welding assembly 41, fold the flip plate 511, pull forward to remove the bottom wall assembly 3, and squeeze the side wall assemblies 2 from both sides to fold the folding structure inward, thus completing the folding of the cage; while assembling the cage is the reverse of the above steps.
[0102] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0103] The folding cage provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.
Claims
1. A folding cage, characterized in that, It includes a front wall assembly (4), a rear wall assembly (5), and two side wall assemblies (2) that are connected in sequence and form a closed loop structure. Both the front wall assembly (4) and the rear wall assembly (5) include folding structures to reduce the distance between the two side wall assemblies (2); It also includes a top wall assembly (1) and a bottom wall assembly (3) that are detachably connected and fixed to the two side wall assemblies (2).
2. The folding cage according to claim 1, characterized in that, The folding structure includes a first folding assembly and a second folding assembly that are hinged together. The first folding assembly is hinged to one of the sidewall assemblies (2), and the second folding assembly is hinged to the other sidewall assembly (2).
3. The folding cage according to claim 1, characterized in that, The front wall assembly (4) also includes a detachable and fixed welding assembly (41) for closing the area corresponding to the front wall assembly (4) in the unfolded state of the folded structure.
4. The folding cage according to claim 3, characterized in that, The front wall assembly (4) also includes a fourth guide assembly (42) that is fixed relative to the side wall assembly (2). When the folding structure is fully unfolded, the welding assembly (41) can slide and insert along one end of the fourth guide assembly (42); The front wall assembly (4) also includes a fourth locking assembly (413) for locking the relative position of the welding assembly (41) and the fourth guide assembly (42).
5. The folding cage according to claim 3, characterized in that, The welding assembly (41) includes a door body (411) and / or several accessory fixing assemblies; The door (411) can be opened and connects to the internal space formed by the top wall assembly (1), the side wall assembly (2), the bottom wall assembly (3), the front wall assembly (4) and the rear wall assembly (5); The attachment fixing component is used to fix the attachments required for feeding.
6. The folding cage according to claim 1, characterized in that, The rear wall assembly (5) further includes an extrusion plate assembly, which is relatively movable to the folding structure, and the direction of relative movement is the same as the normal direction of the rear wall assembly (5); The extrusion plate assembly is used to divide the internal space formed by the top wall assembly (1), the side wall assembly (2), the bottom wall assembly (3), the front wall assembly (4), and the rear wall assembly (5).
7. The folding cage according to claim 6, characterized in that, The extrusion plate assembly includes two independent extrusion plate assemblies (51), each extrusion plate assembly (51) including a hinged flip plate (511) and a sliding plate (512), the sliding plate (512) being slidably mounted to the corresponding side wall assembly (2), and the sliding direction being the same as the normal direction of the rear wall assembly (5); The flip plate (511) has a connecting part (513) on the side away from the sliding plate (512) for connecting the two extrusion plate assemblies (51).
8. The folding cage according to claim 7, characterized in that, Both ends of the sidewall assembly (2) are provided with vertical extension walls (21). When the flip plate (511) is flipped relative to the sliding plate (512) to a set angle, the flip plate (511) can be accommodated in the space enclosed by the side wall assembly (2) and the vertical extension wall (21).
9. The folding cage according to any one of claims 1-8, characterized in that, The sidewall assembly (2) further includes a first guide assembly (31), and the bottom wall assembly (3) is slidably inserted along one end of the first guide assembly (31); The bottom wall assembly (3) further includes a second locking component (32) for locking the relative position of the bottom wall assembly (3) and the side wall assembly (2).
10. The folding cage according to claim 9, characterized in that, The bottom wall assembly (3) is a mesh plate; A receiving plate (6) is provided below the bottom wall assembly (3), and the receiving plate (6) is slidably installed relative to the bottom wall assembly (3).