A modular bionic planar ant nest

Abstract

The application discloses a combined bionic plane ant nest, which comprises a plurality of ant houses, clamping devices are respectively arranged on the side walls of the ant houses, the ant houses are movably clamped and connected through the clamping devices and are arranged in communication with each other, the clamping device comprises a clamping female part and a clamping male part, the clamping female part and the clamping male part are movably clamped and connected in correspondence with each other, a clamping groove is arranged in the middle of the clamping female part, a communication hole is formed in the middle of the clamping groove, connecting holes are arranged on the left and right sides of the clamping female part, connecting nuts are movably arranged in the connecting holes, the connecting nuts pass through the connecting holes and are used for fixing and mounting the clamping female part on the side wall of the ant house. The combined bionic plane ant nest has the advantages that the clamping and connecting structure is simple and practical, different ant houses with different structures can be clamped and spliced, the ant nest is better suitable for the feeding and use requirements of ants, and the feeding environment in the ant house can be changed so as to be suitable for feeding ants with different types, different habits and different growth requirements.

Description

Technical Field

[0001] This invention relates to the field of design and application technology of artificial ant nests, and more specifically to a modular biomimetic planar ant nest. Background Technology

[0002] Artificial ant nests are mainly used in biological research, teaching, biology classrooms or biological exhibition areas in primary, secondary, and tertiary schools, as well as for legal personal pet ant keeping. However, existing artificial ant nests are generally individual nest chambers, which not only limit the number of ants that can be kept, but also restrict the space for ants to live and move around, affecting the use of large-scale ant colony keeping.

[0003] Existing technologies include Chinese patent: "An Artificial Ant Nest That Can Be Infinitely Spliced ​​Together", authorized announcement number CN214593699U. This patent document discloses a spliced ​​artificial ant nest that can connect multiple ant nests together, effectively increasing the space of the ant nest.

[0004] In existing technologies, ant nests, besides having limited living space, also suffer from the following technical drawbacks:

[0005] Disadvantage 1: In the existing technology, the ant nests that are pieced together only increase in quantity, and cannot be set up to differentiate the specific functions and types of ant nests. Ants need different living spaces to grow and develop, such as living areas, activity areas, and movement areas. The structure of the existing ant nests cannot be added, reduced, changed, or pieced together according to the above requirements.

[0006] Disadvantage 2: The existing ant nest structure cannot change the cultivation environment (such as dryness, humidity, soft or hard ground, degree of shading, etc.) according to the cultivation requirements to suit the life and cultivation of different ant species and different habits, and cannot be well adapted to the breeding and use of ants. Summary of the Invention

[0007] The present invention discloses a combined biomimetic planar ant nest, the main purpose of which is to overcome the above-mentioned deficiencies and shortcomings of the existing technology.

[0008] The technical solution adopted in this invention is as follows:

[0009] A modular biomimetic planar ant nest includes several ant cells. Each ant cell has a snap-fit ​​device mounted on its sidewall. The ant cells are movably connected and interconnected via these snap-fit ​​devices. Each snap-fit ​​device includes a female snap-fit ​​component and a female snap-fit ​​component. The female snap-fit ​​component and the female snap-fit ​​component are movably connected by corresponding snap-fit ​​mechanisms. The female snap-fit ​​component has a snap-fit ​​groove in its center, with a connecting hole in the center of the groove. Connecting holes are provided on both the left and right sides of the female snap-fit ​​component. A connecting nut is fitted through the connecting hole, and the connecting nut passes through the connecting hole to fix the snap-fit ​​female part to the side wall of the ant house; a snap-fit ​​block is provided in the middle of the snap-fit ​​female part, and the snap-fit ​​block protrudes from the surface of the snap-fit ​​female part, and the snap-fit ​​block is engaged with the snap-fit ​​groove; an inlet hole and a ventilation hole are respectively opened on the outer wall of the ant house, and the inlet hole and the connecting hole are matched and correspondingly set, and a plug is also movably inserted into the inlet hole and the connecting hole.

[0010] Furthermore, the snap-fit ​​groove is provided with an upward-opening opening, and the left and right sides of the snap-fit ​​groove are respectively provided with inclined snap-fit ​​grooves. The left and right sides of the snap-fit ​​block are respectively provided with inclined snap-fit ​​edges, and the inclined snap-fit ​​edges are movably engaged and connected in the inclined snap-fit ​​grooves along the up and down directions.

[0011] Furthermore, the ant house includes an ant living room and an ant activity room, which are connected by the snap-fit ​​device.

[0012] Furthermore, the ant dwelling is equipped with a dividing strip that divides the ant dwelling into several areas. The dividing strip has an entrance and an exit, and an isolation plate is movably inserted into the entrance and exit. A corresponding hole is opened on the top surface above the entrance and exit of the ant dwelling, through which the isolation plate can be inserted and locked onto the entrance and exit.

[0013] Furthermore, the ant dwelling is equipped with a soft floor.

[0014] Furthermore, the bottom surface of the ant dwelling is covered with a floor layer and a water-absorbing mat layer. The water-absorbing mat layer is laid below the floor layer, and the floor layer has several open areas that expose the water-absorbing mat layer. A straight hole is opened on the dividing strip in the middle of the ant dwelling, and the straight hole is connected to the water-absorbing mat layer. A water storage pipe is movably inserted into the straight hole, and water is stored in the water storage pipe.

[0015] Furthermore, the water storage straight pipe has a test tube structure, and a water-permeable cotton plug is inserted at the opening of the water storage straight pipe, and the cotton plug is in movable contact with the water-absorbing pad layer.

[0016] Furthermore, the ant dwelling is equipped with a light-shielding plate that can be moved to cover it. The light-shielding plate has connecting holes that correspond to the ventilation holes and the through holes, respectively.

[0017] Furthermore, the ant house has a rectangular structure.

[0018] Furthermore, the top wall of the ant activity room is a movable cover, with an opening in the middle of the top wall, and a cover plate is installed on the opening to fit the movable cover.

[0019] As can be seen from the above description of the present invention, compared with the prior art, the advantages of the present invention are:

[0020] Advantage 1: This invention, by setting up a snap-fit ​​device, can easily snap-fit ​​and connect ant houses. Not only is the snap-fit ​​connection structure simple and practical, but it can also snap-fit ​​and splice ant houses with different structures, making it better suited to the needs of ant breeding.

[0021] Advantage 2: By setting partitions inside the ant house, this invention can not only divide the ant house into several interconnected areas, but also change the size of the ant house in a timely manner according to the requirements of the number of ants being raised, so as to better cultivate the living habits of ants and prevent ants from accumulating excrement in the ant house due to the excessive size of the ant house.

[0022] Advantage 3: By setting up a floor layer, an absorbent pad layer, a water storage straight pipe, and straight through holes, this invention can change the breeding environment inside the ant house to suit the breeding of different species of ants with different habits and different growth requirements, thereby increasing the breeding and use functions of the ant house and making it better applicable to the breeding of ants. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention.

[0024] Figure 2 This is a schematic diagram of the snap-fit ​​device of the present invention.

[0025] Figure 3 This is a top view of the structure of Embodiment 1 of the present invention.

[0026] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the present invention.

[0027] Figure 5 This is a top view of the structure of Embodiment 2 of the present invention.

[0028] Figure 6 This is a structural schematic diagram of Embodiment 3 of the present invention.

[0029] Figure 7 This is a top view of the structure of Embodiment 3 of the present invention.

[0030] Figure 8 This is a schematic diagram of the structure of the water storage straight pipe 7 of the present invention.

[0031] Figure 9 This is a schematic diagram of the structure of Embodiment 4 of the present invention.

[0032] Figure 10 This is a top view of the structure of Embodiment 4 of the present invention.

[0033] Figure 11 This is a top view of the structure of Embodiment 5 of the present invention.

[0034] Figure 12 This is a top view of the structure of Embodiment Six of the present invention.

[0035] Figure 13 This is a top view of the structure of Embodiment 7 of the present invention.

[0036] Figure 14 This is a top view of the structure of Embodiment 8 of the present invention.

[0037] Among them, the ant dwelling 1, the partition strip 11, the entrance 111, the straight hole 112, the isolation plate 12, the strip hole 13, the light shield 14, the soft bottom surface 15, the floor layer 16, the open area 161, the water-absorbing pad layer 17, the ant activity room 2, the opening 21, the cover plate 22, the snap-fit ​​device 3, the snap-fit ​​female part 31, the snap-fit ​​groove 311, the inclined snap-fit ​​groove 3111, the connecting hole 312, the connecting hole 313, the connecting nut 314, the snap-fit ​​sub-part 32, the snap-fit ​​block 321, the inclined snap-fit ​​edge 3211, the entrance hole 4, the ventilation hole 5, the plug body 6, the water storage straight pipe 7, the cotton plug 71, and the connecting hole 8. Detailed Implementation

[0038] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0039] Example 1

[0040] As shown in Figure 1, Figure 2 and Figure 3As shown, a modular biomimetic planar ant nest includes an ant house with a rectangular structure. The ant house comprises an ant living room 1 and an ant activity room 2. The top wall of the ant activity room 2 is movably covered, with an opening 21 in the center. A cover plate 22 is movably mounted on the opening 21. The side walls of the ant living room 1 and the ant activity room 2 are respectively equipped with snap-fit ​​devices 3, allowing the ant living room 1 and the ant activity room 2 to be movably connected and interconnected via these snap-fit ​​devices 3. The snap-fit ​​device 3 includes a snap-fit ​​female part 31 and a snap-fit ​​female part 32. The snap-fit ​​female part 31 and the snap-fit ​​female part 32 are correspondingly and movably snapped together. The snap-fit ​​female part 31 has a snap-fit ​​groove 311 in the middle, and a connecting hole 312 is opened in the middle of the snap-fit ​​groove 311. The left and right sides of the snap-fit ​​female part 31 have connecting holes 313, and connecting nuts 314 are fitted through the connecting holes 313. The connecting nuts 314 pass through the connecting holes 313 and fix the snap-fit ​​female part 31 to the side wall of the ant house. The snap-fit ​​female part 32 has a snap-fit ​​block 321 in the middle. The snap-fit ​​block 321 protrudes from the surface of the snap-fit ​​female part 32 and is movably snapped together with the snap-fit ​​groove 311. The snap-fit ​​component 32 has connecting holes 313 on both its left and right sides. Connecting nuts 314 are fitted through these connecting holes 313, securing the snap-fit ​​component 32 to the side wall of the ant house. The snap-fit ​​groove 311 has an upward-opening opening, and inclined snap-fit ​​grooves 3111 are provided on both its left and right sides. The snap-fit ​​block 321 has inclined snap-fit ​​edges 3211 on both its left and right sides, which movably engage with the inclined snap-fit ​​grooves 3111 in the upward and downward directions. By providing the snap-fit ​​device 3, ant houses can be easily snapped together. This snap-fit ​​connection structure is simple and practical, and different structures of ant houses can be snapped together, better meeting the needs of ant rearing.

[0041] As shown in Figure 1, Figure 2 and Figure 3As shown, the outer walls of the ant dwelling 1 and the ant activity room 2 are respectively provided with entrance holes 4 and ventilation holes 5. The entrance holes 4 are matched and corresponding to the connecting holes 312. A plug 6 is also movably inserted into the entrance holes 4 and the connecting holes 313. A partition strip 11 is provided inside the ant dwelling 1, dividing the ant dwelling 1 into several areas. An entrance 111 is provided on the partition strip 11, and an isolation plate 12 is movably inserted into the entrance 111. A corresponding slot 13 is provided on the top surface above the entrance 111 of the ant dwelling 1, through which the isolation plate 12 can be inserted and secured to the entrance. A light-shielding plate 14 is movably covered on the ant dwelling 1, and a connecting hole 8 is provided on the light-shielding plate 14, corresponding to the ventilation holes 5. By setting up dividers 11 inside the ant house, the ant house can be divided into several interconnected areas. The size of the ant house can also be changed in a timely manner according to the requirements of the number of ants being raised, so as to better cultivate the living habits of ants and prevent ants from accumulating excrement in the ant house due to the excessive size of the ant house.

[0042] Example 2

[0043] like Figure 2 , Figure 4 and Figure 5As shown, a modular biomimetic planar ant nest includes an ant house with a rectangular structure. The ant house comprises an ant living room 1 and an ant activity room 2. The top wall of the ant activity room 2 is movably covered, with an opening 21 in the center. A cover plate 22 is movably mounted on the opening 21. The side walls of the ant living room 1 and the ant activity room 2 are respectively equipped with snap-fit ​​devices 3, allowing the ant living room 1 and the ant activity room 2 to be movably connected and interconnected via these snap-fit ​​devices 3. The snap-fit ​​device 3 includes a snap-fit ​​female part 31 and a snap-fit ​​female part 32. The snap-fit ​​female part 31 and the snap-fit ​​female part 32 are correspondingly and movably snapped together. The snap-fit ​​female part 31 has a snap-fit ​​groove 311 in the middle, and a connecting hole 312 is opened in the middle of the snap-fit ​​groove 311. The left and right sides of the snap-fit ​​female part 31 have connecting holes 313, and connecting nuts 314 are fitted through the connecting holes 313. The connecting nuts 314 pass through the connecting holes 313 and fix the snap-fit ​​female part 31 to the side wall of the ant house. The snap-fit ​​female part 32 has a snap-fit ​​block 321 in the middle. The snap-fit ​​block 321 protrudes from the surface of the snap-fit ​​female part 32 and is movably snapped together with the snap-fit ​​groove 311. The snap-fit ​​groove 311 has an upward-opening opening. The left and right sides of the snap-fit ​​groove 311 are respectively provided with inclined snap-fit ​​grooves 3111. The left and right sides of the snap-fit ​​block 321 are respectively provided with inclined snap-fit ​​edges 3211. The inclined snap-fit ​​edges 3211 are movably engaged and connected in the inclined snap-fit ​​grooves 3111 in the up and down directions.

[0044] like Figure 2 , Figure 4 and Figure 5 As shown, the outer walls of the ant dwelling 1 and the ant activity room 2 are respectively provided with entrance holes 4 and ventilation holes 5. The entrance holes 4 are matched and corresponding to the connecting holes 312. A plug 6 is also movably inserted into the entrance holes 4 and the connecting holes 313. A partition strip 11 is provided inside the ant dwelling 1, dividing the ant dwelling 1 into several areas. An entrance 111 is provided on the partition strip 11, and an isolation plate 12 is movably inserted into the entrance 111. A corresponding slot 13 is provided on the top surface above the entrance 111 of the ant dwelling 1, through which the isolation plate 12 can be inserted and secured to the entrance. A light-shielding plate 14 is movably covered on the ant dwelling 1, and a connecting hole 8 is provided on the light-shielding plate 14, corresponding to the ventilation holes 5. A soft bottom surface 15 is laid inside the ant dwelling 1.

[0045] Example 3

[0046] like Figure 2 , Figure 6 , Figure 7 Hehe Figure 8 As shown, a modular biomimetic planar ant nest includes an ant house with a rectangular structure. The ant house comprises an ant living room 1 and an ant activity room 2. The top wall of the ant activity room 2 is movably covered, with an opening 21 in the center. A cover plate 22 is movably mounted on the opening 21. The side walls of the ant living room 1 and the ant activity room 2 are respectively equipped with snap-fit ​​devices 3, allowing the ant living room 1 and the ant activity room 2 to be movably connected and interconnected via these snap-fit ​​devices 3. The snap-fit ​​device 3 includes a snap-fit ​​female part 31 and a snap-fit ​​female part 32. The snap-fit ​​female part 31 and the snap-fit ​​female part 32 are correspondingly and movably snapped together. The snap-fit ​​female part 31 has a snap-fit ​​groove 311 in the middle, and a connecting hole 312 is opened in the middle of the snap-fit ​​groove 311. The left and right sides of the snap-fit ​​female part 31 have connecting holes 313, and connecting nuts 314 are fitted through the connecting holes 313. The connecting nuts 314 pass through the connecting holes 313 and fix the snap-fit ​​female part 31 to the side wall of the ant house. The snap-fit ​​female part 32 has a snap-fit ​​block 321 in the middle. The snap-fit ​​block 321 protrudes from the surface of the snap-fit ​​female part 32 and is movably snapped together with the snap-fit ​​groove 311. The snap-fit ​​groove 311 has an upward-opening opening. The left and right sides of the snap-fit ​​groove 311 are respectively provided with inclined snap-fit ​​grooves 3111. The left and right sides of the snap-fit ​​block 321 are respectively provided with inclined snap-fit ​​edges 3211. The inclined snap-fit ​​edges 3211 are movably engaged and connected in the inclined snap-fit ​​grooves 3111 in the up and down directions.

[0047] like Figure 2 , Figure 6 , Figure 7 Hehe Figure 8As shown, the outer walls of the ant dwelling 1 and the ant activity room 2 are respectively provided with entrance holes 4 and ventilation holes 5. The entrance holes 4 are matched and corresponding to the connecting holes 312. A plug 6 is also movably inserted into the entrance holes 4 and the connecting holes 313. A partition strip 11 is provided inside the ant dwelling 1, dividing the ant dwelling 1 into several areas. An entrance 111 is provided on the partition strip 11, and an isolation plate 12 is movably inserted into the entrance 111. A corresponding slot 13 is provided on the top surface above the entrance 111 of the ant dwelling 1, through which the isolation plate 12 can be inserted and secured to the entrance. A light-shielding plate 14 is movably covered on the ant dwelling 1, and a connecting hole 8 is provided on the light-shielding plate 14, corresponding to the ventilation holes 5. The bottom surface of the ant dwelling 1 is covered with a floor layer 16 and a water-absorbing mat layer 17. The water-absorbing mat layer 17 is laid below the floor layer 16. The floor layer 16 has several open areas 161, which expose the water-absorbing mat layer 17. A straight hole 112 is opened on the dividing strip 11 in the middle of the ant dwelling 1. The straight hole 112 is connected to the water-absorbing mat layer 17. A water-storing straight pipe 7 is movably inserted into the straight hole 112, and water is stored in the water-storing straight pipe 7. The water-storing straight pipe 7 has a test tube structure. A water-permeable cotton plug 71 is inserted at the opening of the water-storing straight pipe 7. The cotton plug 71 is movably abutting against the water-absorbing mat layer 17. By incorporating structures such as a floor layer 16, an absorbent pad layer 17, a water storage pipe 7, and a straight through hole 112, the breeding environment inside the ant house can be modified to suit different species of ants with different habits and growth requirements, thereby increasing the breeding and use functions of the ant house and making it better suited for ant breeding.

[0048] In use: Install the snap-fit ​​female part 31 and the snap-fit ​​female part 32 of the snap-fit ​​device 3 on the outer wall of the ant dwelling 1 and the ant activity room 2 respectively. Then, by cooperating with the snap-fit ​​female part 31 and the snap-fit ​​female part 32, the snap-fit ​​connection of different ant dwellings 1 and ant activity rooms 2 can be quickly and stably snapped together.

[0049] Then, open up the area of ​​ant housing 1 according to the number of ants, and use the isolation plate 12 to close or open the partition area of ​​ant housing to avoid the space inside ant housing 1 being too large, so that the ants will directly accumulate their excrement inside ant housing 1.

[0050] When the ants being raised require a humid environment, fill the water storage pipe 7 with water and plug the opening of the water storage pipe 7 with cotton plug 71. Then, place the inverted water storage pipe 7 into the straight hole 112 of the separator strip 11. The cotton plug 71 moves and abuts against the absorbent pad 17, and the water seeps into the absorbent pad 17 through the cotton plug, keeping the ant living room 1 in a humid environment to meet the normal breeding requirements of this type of ant.

[0051] Example 4

[0052] like Figure 9 and Figure 10 As shown, the difference between this embodiment and Embodiment 3 is that the floor layer 16 of the ant habitat 1 in this embodiment uses either a hard floor layer or a soft floor layer, and has no water storage pipe or absorbent pad layer. By using different floor materials, different environmental needs of ants can be cultivated. The other structures are the same as in Embodiment 3, and will not be repeated here.

[0053] Example 5

[0054] like Figure 11 As shown, the difference between this embodiment and Embodiment Two is that the ant dwelling 1 in this embodiment consists of a floor layer 16 with a water storage pipe 7 and a floor layer 16 without a water storage pipe 7. This allows for arbitrary changes, additions, and combinations based on the actual requirements of ant cultivation, making the splicing and combination more flexible and convenient, and more practical. The ant activity room 2 in this embodiment combines two different structures to better create different activity spaces. Other structures are the same as in Embodiment Two and will not be repeated here.

[0055] Example 6

[0056] like Figure 12 As shown, the difference between this embodiment and embodiment two is that the ant dwelling 1 in this embodiment uses a floor layer 16 with a water storage straight pipe 7. The other structures are the same as those in embodiment two, and will not be repeated here.

[0057] Example 7

[0058] like Figure 13 As shown, the difference between this embodiment and Embodiment 3 is that there are two types of ant dwellings 1 in this embodiment: one is a floor layer 16 with a water storage pipe 7, and the other is a floor layer 16 without a water storage pipe 7. The two types of ant dwellings 1 are symmetrically spliced ​​on the left and right sides of the ant activity room 2, respectively. The other structures are the same as those in Embodiment 3, and will not be repeated here.

[0059] Example 8

[0060] like Figure 14As shown, the difference between this embodiment and Embodiment 1 is that there are two types of ant dwellings 1 in this embodiment: one with a floor layer 16 containing a water storage pipe 7 and the other without a water storage pipe 7. These two different structures of ant dwellings 1 are respectively connected and assembled with the ant activity room 2 to form an ant house. The other structures are the same as in Embodiment 1, and will not be repeated here.

[0061] The above are merely specific embodiments of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial improvements made to the present invention using this concept should be considered as infringing on the protection scope of the present invention.

Claims

1. A modular biomimetic planar ant nest, characterized in that: The application relates to an ant house comprising a plurality of ant houses, which are respectively provided with clamping devices on the side walls, and are movably clamped and connected with each other through the clamping devices; the clamping device comprises a clamping female part and a clamping male part, which are movably clamped and connected in a matched mode; the middle part of the clamping female part is provided with a clamping groove, the middle part of the clamping groove is provided with a communication hole, the left and right sides of the clamping female part are provided with connecting holes, connecting nuts are matched and penetrated on the connecting holes, the connecting nuts penetrate through the connecting holes, and the clamping female part is fixedly installed on the side wall of the ant house; the middle part of the clamping male part is provided with a clamping block, the clamping block protrudes from the surface of the clamping male part, and the clamping block is movably clamped and connected with the clamping groove; the outer wall of the ant house is respectively provided with an entrance and exit hole and a ventilation hole, the entrance and exit hole is matched and arranged with the communication hole, and a plug body is movably plugged on the entrance and exit hole and the connecting hole; the clamping groove is provided with an upwardly open opening, and the left and right sides of the clamping groove are respectively provided with inclined clamping grooves; the left and right sides of the clamping block are respectively provided with inclined clamping edges, and the inclined clamping edges are movably clamped and connected in the inclined clamping grooves in the up-down direction; The ant house comprises an ant living house and an ant activity house, and the ant living house and the ant activity house are movably clamped and connected through the clamping device; A partition strip is arranged in the ant living house, the ant living house is divided into a plurality of areas by the partition strip, an entrance and exit is arranged on the partition strip, a partition plate is movably inserted on the entrance and exit, a strip hole is arranged on the top surface above the entrance and exit of the ant living house, the partition plate can be inserted from the strip hole and clamped on the entrance and exit; A floor layer and a water absorption pad layer are arranged on the bottom surface of the ant living house, the water absorption pad layer is arranged below the floor layer, a plurality of open areas are arranged on the floor layer, and the water absorption pad layer is exposed in the open areas; a straight-through hole is arranged on the partition strip in the middle part of the ant living house, the straight-through hole is communicated with the water absorption pad layer, a water storage straight pipe is movably arranged on the straight-through hole, and water is stored in the water storage straight pipe; The water storage straight pipe is in a test tube structure, a water-permeable cotton plug is arranged on the opening of the water storage straight pipe, and the cotton plug is movably abutted with the water absorption pad layer; a light shielding plate is movably arranged on the ant living house, and a communication hole corresponding to the ventilation hole and the straight-through hole is arranged on the light shielding plate.

2. A modular bionic flat ant nest according to claim 1, characterized in that: A soft bottom surface is arranged in the ant living house.

3. The modular bionic flat ant nest according to claim 1, characterized in that: The ant house is in a rectangular structure.

4. The modular bionic flat ant nest according to claim 1, characterized in that: The top wall of the ant activity house is an activity cover, an opening is arranged in the middle part of the top wall, and a cover plate is movably arranged on the opening.

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