Pet excrement collecting bin

Abstract

The utility model belongs to the technical field of pet supplies, and particularly relates to a pet excrement collecting bin which comprises a roller driven by power to rotate, and a sand pouring opening is formed in the circumferential side wall of the roller; the screening assembly is arranged in the roller and comprises a sand screening plate and a sand blocking plate connected to the lower portion of the sand screening plate, the sand screening plate extends in the circumferential direction of the roller and is provided with a first end and a second end in the extending direction, the sand blocking plate is located at the sand pouring opening and forms a sand containing structure with the inner wall of the roller, and the first end of the sand screening plate abuts against the side wall of the roller; the second end of the sand screening plate exceeds the sand blocking plate in the extending direction, the projection of the second end on the inner wall of the roller covers the sand pouring opening, a set gap is formed between the second end of the sand screening plate and the inner wall of the roller, and a plurality of screening holes are formed in the sand screening plate. The excrement collecting bin is located below the roller and provided with a discharging opening matched with the sand pouring opening. According to the utility model, the shearing risk caused to pets when the rolling barrel rotates is eliminated, the potential safety hazard is eliminated, and the use safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pet supplies technical field, especially a kind of pet excrement collecting bin. BACKGROUND

[0002] With the gradual increase of people who raise pets, in order to facilitate the automatic cleaning of the excrement of pets (such as pet cats), various pet litter boxes or pet toilets have emerged in the market, among which the drum-type pet litter box has gradually become the mainstream choice in the market due to its efficient and convenient automatic cleaning function. Users need to pre-pave an appropriate amount of sand in the pet litter box, and after the pet defecates in the litter box, the sand will combine with the excrement to form excrement sand balls. When pouring the excrement sand balls, the rotation of the drum is usually used in cooperation with the screen, which can automatically separate the excrement sand balls and the sand, so that the excrement sand balls fall into the collection bin below the drum through the sand pouring port of the drum, realizing the automatic cleaning of the sand and greatly reducing the cleaning burden of the pet owner.

[0003] However, although the drum-type pet litter box has shown significant advantages in improving the quality of pet life, there are certain safety hazards hidden in its design. When the sand pouring port of the drum is connected with the dropping port of the bottom collection bin during the rotation of the drum, a shearing effect will be generated between the two, which may unintentionally cause harm to the pet and pose a risk of injury to the pet.

[0004] Some existing solutions either monitor the inside and surrounding area of the pet litter box in real time by installing sensors, and immediately stop the rotation of the drum once the presence of the pet is detected, so as to avoid the rotation of the drum during the pet's activity and prevent accidents; or by setting some braking structures to trigger the built-in locking mechanism or blocking mechanism when the drum rotates to a certain angle, preventing the drum from continuing to rotate. However, they are all designed based on the concept of "avoiding the rotation of the drum at inappropriate time". During the rotation of the drum, the shearing effect cannot be effectively solved, and the risk of injury to the pet cannot be fundamentally eliminated. In order to solve this risk, there are also ways to separate the dropping port and the sand pouring port on the market, i.e. by transferring the sand pouring port to the side of the drum through a slide-like structure, so as to avoid the alignment of the sand pouring port and the dropping port to form a shearing port. However, this way greatly changes the existing drum structure, which is not only complex in design, but also easy to cause the sticking of sand balls in the slide during the sand pouring process, which brings inconvenience to the structure design and cleaning use. UTILITY MODEL CONTENTS

[0005] In view of the above prior art deficiencies, the utility model aims at providing a pet excrement collecting bin to solve the technical problem that the shearing action between the rolling drum and the excrement collecting bin in the prior art can cause the pet to be pinched.

[0006] To achieve the above object and other related objects, the utility model technical scheme is as follows:

[0007] A pet excrement collecting bin comprises:

[0008] The drum is driven to rotate by power, and the circumferential side wall of the drum is provided with a sand pouring opening;

[0009] The screening assembly is arranged in the drum and comprises a sand screening plate and a sand blocking plate connected below the sand screening plate, the sand screening plate extends along the circumference of the drum and has a first end and a second end in the extending direction, the sand blocking plate is located at the sand pouring opening and forms a sand containing structure with the inner wall of the drum, the first end of the sand screening plate abuts against the side wall of the drum, the second end of the sand screening plate exceeds the sand blocking plate in the extending direction and the projection of the second end on the inner wall of the drum covers the sand pouring opening, and a set gap is formed between the second end of the sand screening plate and the inner wall of the drum, and a plurality of screen holes are arranged on the sand screening plate.

[0010] The excrement collecting bin is located below the drum and has a material falling opening matched with the sand pouring opening.

[0011] Through the cooperation of the sand blocking plate and the sand screening plate and the fact that the second end of the sand screening plate exceeds the sand blocking plate and covers the sand pouring opening on the inner wall of the drum, the pet is prevented from contacting the sand pouring opening from the physical structure, the shearing action when the sand pouring opening is aligned with the material falling opening is prevented from causing harm to the pet, the risk of the pet being pinched or stuck is avoided, the sand pouring opening can be always covered even when the drum is in the rotating process and even when the drum and the material falling opening have relative displacement, the safety of the pet can be ensured, and the sand blocking plate and the inner wall of the drum form a sand containing structure to only partially block the sand pouring opening, which does not affect the dumping of sand clumps and the replacement of sand material, overcomes the technical prejudice and obstacle that the existing drum structure cannot eliminate the shearing risk, maintains safe and effective work, and meets the needs of simple structure design and cost reduction.

[0012] Optionally, the sand blocking plate and the sand screening plate divide the inner cavity of the drum into a first cavity and a second cavity, the first cavity corresponds to the screen holes, and the second cavity corresponds to the sand pouring opening.

[0013] Through the above structure, the sand in the sand material can be separated into sand balls (excrement and sand material) and clean sand (clean sand material) by the screen of the sand screen plate, so that the sand balls are retained on the sand screen plate and enter the second cavity along the sand screen plate, and the clean sand is filtered into the first cavity through the screen hole of the sand screen plate, thereby realizing the isolation of the sand balls and the clean sand. Through the rolling of the roller, the sand balls can be rolled to the bottom of the roller through the sand screen plate until they are poured out through the sand pouring opening.

[0014] Optionally, the height of the set gap is greater than the maximum particle size of the sand balls.

[0015] Through the above structure, the set gap formed between the second end of the sand screen plate and the inner wall of the roller limits the set gap, which can on the one hand ensure the sand pouring function, that is, ensure that the sand balls (excrement and sand material) can smoothly pass through the set gap to be poured out through the sand pouring opening, without affecting the filtration and replacement of the sand material; on the other hand, simultaneously realizes pet anti-pinch, which can eliminate the risk of the pet's paw being pinched when it extends into the gap.

[0016] Optionally, the sand screen plate comprises a sand shoveling part and an extension part connected thereto, the screen hole is arranged on the sand shoveling part and adjacent to the first end, and the sand blocking plate is connected to the bottom wall of the extension part.

[0017] Through the above structure, the sand shoveling part is used to roll the sand material onto the sand shoveling part when the roller rotates, and separate the sand material into sand balls and clean sand (clean sand material) through the screen hole on the sand shoveling part; at the same time, the sand balls can enter the area surrounded by the sand blocking plate through the guidance of the extension part, so as to be poured out when the sand pouring opening and the material falling opening are aligned.

[0018] Optionally, the sand screen plate is in a continuous S-shaped wave shape along the extension direction thereof.

[0019] Through the above structure, the wave-shaped sand screen plate can better guide the sand balls to roll along the sand screen plate to the bottom of the roller during the rotation of the roller, which is beneficial to efficiently and quickly separate the sand balls and the clean sand, and at the same time, can increase the recycling path of the sand material to improve the recycling rate of the sand material and realize more efficient sand filtering.

[0020] Optionally, the sand screen plate is raised at the two side edges adjacent to the two opposite side walls of the roller, and the middle part is in a concave shape.

[0021] Through the above structure, the two side edges of the sand screen plate are in a "inwardly recessed" shape to guide the sand balls to the middle part of the sand screen plate, thereby preventing the sand balls from being incompletely recycled due to wall sticking and improving the recycling rate of the sand balls.

[0022] Optionally, the sand baffle includes a sand-collecting portion and guide portions connected to both ends of the sand-collecting portion. The sand-collecting portion has a U-shaped structure, and the opening of the U-shaped structure faces the sand discharge port. The two guide portions extend outward in a direction away from both sides of the sand-collecting portion, and the height of the guide portions gradually decreases in a direction away from the sand-collecting portion.

[0023] The above structure allows the guide section to guide the sand material, facilitating its smooth flow into the sand-collecting section of the baffle plate during drum rotation. This concentrates the sand material in the sand-collecting section, making it easier to pour out the sand material later.

[0024] Optionally, the connection between the sand-collecting part and the guide part is rounded, and the corner of the U-shaped structure of the sand-collecting part is rounded.

[0025] The above structure, with its arc transition, helps to avoid stress concentration at the connection between the sand-collecting part and the guiding part, and also prevents sand from sticking together, thus improving the guiding effect on the sand and facilitating the smoother introduction of the sand into the sand-collecting part.

[0026] Optionally, the plurality of sieve holes are evenly spaced and arranged in an array on the sand screening plate, and at least some of the sieve holes are in the shape of an "I".

[0027] The above structure allows for the use of I-shaped sieve holes to accommodate various shapes of sand, including fine mineral sand or bentonite, as well as long, thin sand, thus improving the adaptability of the sieve holes.

[0028] Optionally, along the extension direction of the sand sieve plate, a plurality of sieve holes are arranged in multiple columns, the sieve holes in adjacent columns are staggered, the adjacent sieve holes in the same column are connected to each other, and the perpendicular bisector of the line connecting the center points of adjacent sieve holes in the same column passes through the center points of the sieve holes in adjacent columns.

[0029] Alternatively, multiple rows of screen holes are arranged in a direction perpendicular to the extension direction of the screen plate, with the screen holes in adjacent rows staggered, adjacent screen holes in the same row connected to each other, and the perpendicular bisector of the line connecting the center points of adjacent screen holes in the same row passing through the center point of the screen holes in the adjacent row.

[0030] The above structure, with its dense arrangement of sieve holes, improves the screening efficiency of sand, facilitating the rapid and efficient screening of sand clumps.

[0031] Optionally, each of the sieve holes includes a first hole portion and a second hole portion, both of which are rectangular. The first hole portion and the second hole portion are perpendicular to each other, and the second hole portion is symmetrically disposed at both ends of the first hole portion, and the second hole portion communicates with the first hole portion.

[0032] Through the above structure, it is beneficial to screen sand of different lengths through the first hole part and the second hole part, so that the screen hole can be suitable for not only fine ore sand or bentonite, but also long-shaped tofu sand.

[0033] Optionally, the length direction of the second hole part is the same as the extension direction of the sand screening plate.

[0034] Through the above structure, the screen hole on the sand screening plate can more efficiently screen sand during the rotation of the drum.

[0035] Optionally, the second hole part is connected with the first hole part through a circular arc transition, and the top angle of the second hole part is connected with the first hole part through a circular arc transition.

[0036] Through the above structure, the circular arc transition structure is beneficial to avoiding stress concentration at the connection between the second hole part and the first hole part, and also avoids sand adhesion, improves the guiding effect on sand, and facilitates smoother passage of sand through the screen hole.

[0037] Optionally, the pet excrement collecting bin further comprises a shell, the shell is arranged on the excrement collecting bin, and the drum is located in the shell.

[0038] Through the above structure, the shell plays a protective role on the drum and other structures, and ensures the privacy of the pet during defecation.

[0039] Optionally, the pet excrement collecting bin has a sand pouring mode and a sand replacing mode, in the sand pouring mode, the drum rotates from the initial position to the sand screening position in the first direction, so that the screening assembly screens out sand balls, and the drum rotates to the sand pouring position in the second direction, so that the sand pouring opening is aligned with the material falling opening, so that the screened sand balls are poured into the excrement collecting bin; in the sand replacing mode, the drum rotates from the initial position to the sand pouring position in the second direction, so that the sand pouring opening is aligned with the material falling opening, so that the sand is poured into the excrement collecting bin.

[0040] Through the above structure, by rotating in the first direction (such as clockwise) and the second direction (counterclockwise) to different positions by different angles, the state switching of the sand pouring mode and the sand replacing mode can be conveniently realized, so that the sand pouring operation (pouring out sand balls) and the sand replacing operation (replacing sand) can be realized.

[0041] As described above, the pet excrement collecting bin has the following beneficial effects:

[0042] The safety threat to pets caused by the shearing action between the sand discharging opening of the drum and the material dropping opening of the excrement collecting bin can be avoided, the shearing risk during the rotation of the drum is eliminated, the pet is effectively prevented from being pinched during the rotation of the drum, the safety hazard is eliminated, and the use safety is improved. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 Overall structure diagram of the pet excrement collecting bin of the utility model embodiment Figure 1 ;

[0044] Figure 2 Overall structure diagram of the pet excrement collecting bin of the utility model embodiment Figure 2 ;

[0045] Figure 3 Partial structure diagram of the pet excrement collecting bin of the utility model embodiment (remove the shell)

[0046] Figure 4 Partial structure diagram of the pet excrement collecting bin of the utility model embodiment (remove the shell and part of the drum)

[0047] Figure 5 Structure diagram of the excrement collecting bin of the utility model embodiment

[0048] Figure 6 Sectional structure diagram of the drum in the initial position of the utility model embodiment

[0049] Figure 7 Structure diagram of the screening assembly of the utility model embodiment Figure 1 ;

[0050] Figure 8 Structure diagram of the screening assembly of the utility model embodiment Figure 2 ;

[0051] Figure 9 Structure diagram of the screening assembly of the utility model embodiment Figure 3 ;

[0052] Figure 10 Sectional structure diagram of the drum in the sand screening position of the utility model embodiment

[0053] Figure 11 Sectional structure diagram of the drum in the sand discharging position of the utility model embodiment.

[0054] REFERENCE SIGNS

[0055] 10 - drum; 11 - sand discharging opening; 12 - sand placing area

[0056] 20 - screening assembly; 21 - sand screen; 21a - first end; 21b - second end; 211 - sand shoveling portion; 212 - extension portion; 22 - sand baffle; 221 - sand pocket portion; 222 - guide portion; 201 - screen hole; 201a - first hole portion;

[0057] 201b - second hole portion;

[0058] 30 - excrement collecting bin; 31 - material dropping port;

[0059] 40 - housing;

[0060] 50 - driving assembly; 51 - driving wheel; 52 - driven wheel. DETAILED DESCRIPTION

[0061] The advantages and effects of the present application can be easily understood by those skilled in the art from the above disclosure. The present application can also be implemented or applied in different specific embodiments, and various modifications or changes can be made to the details based on different viewpoints and applications without departing from the spirit of the present application.

[0062] It should be noted that the drawings provided in the present embodiment only illustrate the basic concept of the present application in a schematic manner, and only show the components related to the present application in the drawings, rather than being drawn according to the number, shape and size of the components in actual implementation. The shape, number and proportion of each component in actual implementation can be changed arbitrarily, and the layout form of the components can also be more complex. It should be understood that the structure, proportion, size, etc. shown in the drawings attached to the present specification are only used to cooperate with the content disclosed in the specification for understanding and reading by those skilled in the art, and do not limit the implementation conditions of the present application, so they do not have technical substantive significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are only for the convenience of clear description, and are not used to limit the scope of the present application. The change or adjustment of the relative relationship, without substantially changing the technical content, is also considered as the scope of the present application.

[0063] In order to describe the present application in detail, the pet excrement collecting bin of the present application will be described in detail as follows:

[0064] Please refer to Figures 1 to 5The utility model provides a kind of pet excrement collecting bin, comprising: drum 10, screening assembly 20 and excrement collecting bin 30, wherein, the drum 10 is rotated by power drive, the circumferential side wall of the drum 10 is equipped with sand pouring opening 11;The screening assembly 20 is set in the drum 10, including sand screen plate 21 and the sand baffle 22 connected below the sand screen plate 21, the sand screen plate 21 extends along the circumference of drum 10, and it has first end 21a and second end 21b in extension direction, the sand baffle 22 is at the sand pouring opening 11 and forms sand pocket structure with the inner wall of the drum 10, the first end 21a of the sand screen plate 21 is in abutment with the side wall of the drum 10, the second end 21b of the sand screen plate 21 exceeds the sand baffle 22 in extension direction and the projection on the inner wall of drum 10 covers the sand pouring opening 11, the second end 21b of the sand screen plate 21 has set gap with the inner wall of the drum 10, a plurality of sieve holes 201 are equipped on the sand screen plate 21;The excrement collecting bin 30 is located below the drum 10, with the blanking opening 31 of the sand pouring opening 11 adaptation.

[0065] Specifically, the inner wall of drum 10 is provided with sand placement area 12, for placing sand material to provide pet with defecation when drum 10 is in initial position. The circumferential side wall of drum 10 is provided with sand pouring opening 11, when drum 10 rotates to the sand pouring opening 11 aligns with the blanking opening 31 of bottom excrement collecting bin 30, can make sand ball (excrement and sand material) or sand material from sand pouring opening 11 guide to excrement collecting bin 30 through blanking opening 31. The rotating action of drum 10 not only promotes the uniform distribution of sand material, but also enhances the mixing and separation efficiency of sand material and pet excrement. The excrement collecting bin 30 is located below the drum 10, which is provided with the blanking opening 31 adapted to the sand pouring opening 11, to ensure that the sand ball after screening can smoothly fall into and be collected.

[0066] Referring to Figure 4 And Figure 6 , the screening assembly 20 includes sand screen plate 21 and sand baffle 22, the first end 21a of the sand screen plate 21 is in abutment with the side wall of the drum 10, and away from the sand pouring opening 11, to ensure that sand material can be scooped up by the first end 21a of the sand screen plate 21 when the drum 10 rotates, so that the sand material rolls smoothly onto the sand screen plate 21, and realizes the screening of sand material on the sand screen plate 21 with the rotation of the drum 10.

[0067] Continuing to refer to Figure 4 And Figure 6, the sand blocking plate 22 is located at the sand pouring opening 11 and forms a sand containing structure with the inner wall of the drum 10 to partially surround the sand pouring opening 11, the top wall of the sand blocking plate 22 is connected with the bottom wall of the sand screening plate 21, and the bottom wall of the sand blocking plate 22 is connected to the edge of the sand pouring opening 11. The second end 21b of the sand screening plate 21 extends beyond the sand blocking plate 22 in the extending direction and covers the sand pouring opening 11 on the inner wall of the drum 10 to partially shield the sand pouring opening 11. In this way, the sand screening plate 21 and the sand blocking plate 22 cooperatively shield the sand pouring opening 11, preventing pets from contacting the sand pouring opening 11, so that the risk of injury to pets caused by the rotation of the drum 10 can be eliminated, and even if the sand pouring opening 11 aligns with the dropping opening 31 when the drum 10 rotates, the pets inside the drum 10 will not be harmed. In addition, the second end 21b of the sand screening plate 21 has a set gap with the inner wall of the drum 10, and due to the existence of the set gap, the normal sand pouring of the sand pouring opening will not be affected.

[0068] In addition, the sand blocking plate 22 is located at the sand pouring opening 11 and forms a sand containing structure with the inner wall of the drum 10, which can enhance the guiding property of the sand during the screening process, better guide the sand clumps or sand to the sand pouring opening 11, and avoid the disordered splashing of the sand during the screening process. At the same time, the cooperation of the sand blocking plate 22 and the sand screening plate 21 ensures that the sand can orderly and stably fall into the underlying waste collecting bin 30 through the sand pouring opening 11 when the drum 10 rotates to align the sand pouring opening 11 with the dropping opening 31.

[0069] Referring to Figure 4 The sand screening plate 21 is uniformly provided with a plurality of sieve holes 201, and the size of the sieve holes 201 is configured to allow fine sand (clean sand) to pass through, while larger sand clumps (excrement clumped sand) are retained on the sand screening plate 21 to achieve effective screening and cleaning of the sand. By accurately controlling the size and distribution of the sieve holes 201, it can be ensured that only sand clumps are screened out, while fine sand particles can continue to be retained in the drum 10 for pets to use, thereby improving the utilization rate of the sand.

[0070] The pet excrement collecting bin can always rely on the sand screening plate 21 and the sand blocking plate 22 to shield the sand pouring opening 11 even when the drum 10 is in the process of rotation and there is a relative displacement between the drum and the dropping opening 31, thereby ensuring the safety of pets; and since the sand blocking plate 22 only partially surrounds the sand pouring opening 11, it does not affect the dumping of sand clumps and the replacement of sand.

[0071] Referring to Figure 6In some embodiments, the sand blocking plate 22 and the sand screening plate 21 divide the inner cavity of the drum 10 into a first cavity and a second cavity, the first cavity corresponds to the sieve hole 201, and the second cavity corresponds to the sand pouring opening 11. Specifically, the side of the sand blocking plate 22 away from the sand pouring opening 11 forms a first cavity with the sand screening plate 21, the first cavity corresponds to the sieve hole 201, and is used to accommodate clean sand (clean sand) filtered out from the sieve hole 201; the side of the sand blocking plate 22 facing the sand pouring opening 11 forms a second cavity with the sand screening plate 21, and is used to accommodate the sand mass (feces and sand mass) screened out in the sand pouring mode or to accommodate the sand in the sand changing mode, so that the sand mass or the sand in the second cavity can smoothly pass through the sand pouring opening 11 and fall into the feces collection bin 30 when the drum 10 rotates to align the sand pouring opening 11 with the sand falling opening 31. The sieve screen of the sand screening plate 21 can separate the sand mass and the clean sand from the sand, so that the sand mass is retained on the sand screening plate 21 and enters the second cavity along the sand screening plate 21, and the clean sand is filtered by the sieve hole 201 of the sand screening plate 21 and enters the first cavity, thereby realizing the isolation of the sand mass and the clean sand. Through the rolling of the drum 10, the sand mass can be rolled to the bottom of the drum 10 through the sand screening plate 21 and then poured out through the sand pouring opening 11. The separation design of the sand blocking plate 22 and the sand screening plate 21 not only enhances the screening efficiency, but also prevents waste of sand during the screening process and improves the recovery rate of sand.

[0072] It should be noted that the second end 21b of the sand screening plate 21 and the inner wall of the drum 10 have a set gap, the height of the set gap is greater than the maximum particle size of the sand mass and less than the minimum size that the paw of the pet can extend into. Specifically, the height of the set gap needs to be greater than the maximum particle size of the sand mass (feces and sand mass), which on the one hand can ensure the sand pouring function, so that the sand mass can roll off the sand screening plate 21 and smoothly pass through the set gap between the sand screening plate 21 and the drum 10 when the drum 10 rotates, so as to enter the feces collection bin 30 from the sand pouring opening 11, without affecting the filtration and replacement of the sand; on the other hand, the height of the set gap needs to be less than the minimum size that the paw of the pet can extend into, which effectively prevents the paw of the pet from accidentally extending into the gap when playing or exploring, thereby avoiding the risk of pinching or scratching.

[0073] Referring to Figure 7In some embodiments, the sand screening plate 21 comprises a sand shoveling portion 211 and an extension portion 212 connected together, the screen holes 201 are arranged on the sand shoveling portion 211 and adjacent to the first end 21a, and the sand blocking plate 22 is connected to the bottom wall of the extension portion 212. Specifically, the sand shoveling portion 211 and the extension portion 212 can be integrally formed, the sand shoveling portion 211 enables more effective shoveling and screening of the sand materials when the drum 10 rotates, so that the sand materials roll onto the sand shoveling portion 211; the screen holes 201 are arranged on the sand shoveling portion 211 and adjacent to the first end 21a, which ensures that the sand materials can smoothly pass through the screen holes 201 and fall into the collection area below when being shoveling by the sand shoveling portion 211, so that the separation of the sand materials is realized through the screen holes 201 on the sand shoveling portion 211, thereby realizing efficient screening of the sand materials, so that the sand clumps and the clean sand are screened out. At the same time, the extension portion 212 provides additional support for the sand screening plate 21, and the sand clumps can enter the area surrounded by the sand blocking plate 22 through the guidance of the extension portion 212, so as to be poured out when the sand pouring opening 11 is aligned with the material falling opening 31. The extension portion 212 also plays a shielding role for the sand pouring opening 11 to prevent pets from touching, thereby avoiding the risk of pets being pinched.

[0074] With reference to Figure 7 In some embodiments, the sand screening plate 21 is in a continuous S-shaped wave shape along the extension direction thereof, which facilitates the rolling of the sand materials. Specifically, the wave-shaped sand screening plate 21 can effectively guide the sand clumps to roll along the surface thereof during the rotation of the drum 10. Compared with the traditional flat or simple curved sand screening plate 21, this design can more smoothly promote the sand clumps to roll off to the bottom of the drum 10. Not only the residence time of the sand clumps in the screening process is reduced, but also the risk of the sand clumps blocking the screen holes 201 is reduced, thereby realizing efficient and rapid separation of the sand clumps and the clean sand. Moreover, the wave-shaped design also increases the recovery path of the sand materials. During the sand screening process, the motion trajectory of the sand materials rolling on the wave-shaped screen plate is more complex and variable, so that the contact area of the sand materials on the screen plate is increased, which helps to recover more sand materials, especially those small and easily scattered sand materials, thereby significantly improving the recovery rate of the sand materials. By realizing more efficient sand filtering, the wave-shaped sand screening plate 21 helps to improve the overall sand screening efficiency.

[0075] With reference to Figure 8In the above embodiment, the sand screening plate 21 is raised at the two side edges close to the two opposite side walls of the drum 10, and the middle part is concave. Specifically, the raising of the two side edges of the sand screening plate 21 plays a guiding role for the sand lump. Under the rotation of the drum 10, the sand lump is guided to move to the middle part of the sand screening plate 21. The "inward" design ensures that the sand lump can be more effectively concentrated in the middle area of the sand screening plate 21, avoiding the dispersion and omission of the sand lump. Moreover, the concave design of the middle part of the sand screening plate 21 can cleverly reduce the contact area of the sand lump with the side wall of the drum 10, reduce the risk of wall sticking, and the sand lump is more easily detached from the side wall of the drum 10 and effectively collected on the sand screening plate 21. Through the design of the raising of the two side edges and the concave of the middle part of the sand screening plate 21, the sand lump recovery process becomes more efficient and complete, not only reducing the omission and waste of the sand lump, but also significantly improving the recovery rate of the sand lump.

[0076] Referring back to Figure 8 In the above embodiment, the sand blocking plate 22 includes a sand holding part 221 and a guide part 222 connected to the two ends of the sand holding part 221. The sand holding part 221 has a U-shaped structure, and the opening of the U-shaped structure faces the sand pouring opening 11. The two guide parts 222 extend outward in directions away from the two sides of the sand holding part 221, respectively. The height of the guide part 222 gradually decreases in the direction away from the sand holding part 221. Specifically, the two guide parts 222 extend to the second end 21b of the sand screening plate 21. The guide parts 222 on the sand blocking plate 22 extend to the two sides away from the sand holding part 221, respectively, forming a guide path, so that during the rotation of the drum 10, the sand can be smoothly guided to the sand holding part 221 along the guide of the guide part 222. The gradually decreasing height of the guide part 222 further enhances its guiding efficiency for the sand, ensuring that the sand can flow smoothly and orderly. Moreover, due to the effective guidance of the guide part 222, the sand is concentratedly introduced into the sand holding part 221. The sand holding part 221 has a U-shaped structure, and its opening faces the sand pouring opening 11, which not only facilitates the reception of sand, but also effectively gathers the sand together, reducing the dispersion and loss of sand. When it is necessary to pour out the sand, since the sand has been concentrated in the sand holding part 221, the pouring out of the sand from the sand pouring opening 11 can be more quickly and conveniently realized, not only improving the work efficiency, but also reducing the difficulty and time waste caused by the dispersion of the sand.

[0077] Understandably, the connection between the sand-collecting part 221 and the guide part 222 is rounded, and the corners of the U-shaped structure of the sand-collecting part 221 are also rounded. Specifically, the connection points between the two sides of the sand-collecting part 221 and the guide part 222 are convex inwards, and the corners of the U-shaped structure of the sand-collecting part 221 are concave inwards. This rounded transition structure helps to avoid stress concentration at the connection between the sand-collecting part 221 and the guide part 222, and also prevents sand from sticking together, improving the guiding effect on the sand and facilitating the smoother introduction of sand into the sand-collecting part 221.

[0078] See Figure 9 In some embodiments, multiple sieve holes 201 are evenly spaced and arranged in an array on the sand screening plate 21, with at least some of the sieve holes 201 being in an "I" shape. Specifically, the staggered and arrayed arrangement of multiple sieve holes 201 allows the sand to be evenly stressed during screening, improving screening efficiency and avoiding local accumulation. Clean sand and sand clumps are separated through the sieve holes 201, with the sand clumps remaining on the sand screening plate 21 and falling through the sieve holes 201. The "I"-shaped sieve holes 201 are less prone to clogging by sand and are adaptable to various shapes of sand, including fine mineral sand or bentonite, as well as long, thin, tofu-like sand, thus improving the adaptability of the sieve holes 201.

[0079] It is worth mentioning that, along the extension direction of the sand screening plate 21, multiple rows of screen holes 201 are arranged, with adjacent rows of screen holes 201 staggered. Adjacent screen holes 201 in the same row are connected to each other, and the perpendicular bisector of the line connecting the center points of adjacent screen holes 201 in the same row passes through the center points of the adjacent rows of screen holes 201. Specifically, the staggered arrangement of adjacent rows of screen holes 201 not only allows the sand screening plate 21 to more efficiently disperse the flow path of the sand during screening, avoiding excessive sand accumulation and making the sand flow more smoothly on the sand screening plate 21, but also enhances the screening capacity and makes the screening more uniform. The connection between adjacent screen holes 201 in the same row, i.e., the edges of adjacent screen holes 201 fitting together, avoids blind spots caused by gaps in the screen holes 201, ensuring the effective utilization rate of the screening surface of the sand screening plate 21. In addition, the perpendicular bisector of the line connecting the center points of adjacent screen holes 201 in the same column passes through the center point of the adjacent screen holes 201, which helps to achieve a more uniform and stable screening efficiency for sand and reduce the probability of clogging.

[0080] In other embodiments, the plurality of screen holes 201 are arranged in multiple rows in a direction perpendicular to the extending direction of the sand screening plate 21, screen holes 201 in adjacent rows are staggered, screen holes 201 in the same row are abutted with each other, and the perpendicular bisector of the line connecting the center points of screen holes 201 in the same row passes through the center points of screen holes 201 in adjacent rows. The screen holes 201 on the sand screening plate 21 can also be arranged in the above structure, which is also conducive to achieving more uniform and stable screening efficiency of the sand, avoiding excessive accumulation of the sand, and reducing the probability of clogging.

[0081] With reference to the above Figure 9 In the above embodiments, each screen hole 201 includes a first hole portion 201a and a second hole portion 201b, the first hole portion 201a and the second hole portion 201b are substantially rectangular, the first hole portion 201a is perpendicular to the second hole portion 201b, the second hole portion 201b is symmetrically arranged at both ends of the first hole portion 201a, and the second hole portion 201b is in communication with the first hole portion 201a. Specifically, the length of the first hole portion 201a can be the same as or different from the length of the second hole portion 201b, and the width of the first hole portion 201a is greater than or equal to the width of the second hole portion 201b. The screen hole 201 can screen long strip-shaped sand with different lengths through the first hole portion 201a and the second hole portion 201b. In this way, the screen hole 201 can be not only suitable for fine sand or bentonite, but also compatible with long strip-shaped tofu sand.

[0082] In the above embodiments, the length direction of the second hole portion 201b is the same as the extending direction of the sand screening plate 21. Specifically, the first hole portion 201a is perpendicular to the second hole portion 201b, that is, the first hole portion 201a is perpendicular to the extending direction of the sand screening plate 21, which can form partial interception and screening of the sand during the rotation of the drum 10; the length direction of the second hole portion 201b is the same as the extending direction of the sand screening plate 21, which is conducive to orderly guiding the sand in the extending direction of the sand screening plate 21, so that the sand can flow in a specific direction when passing through the screen hole 201, reducing the accumulation and clogging of the sand in the screen hole 201, and improving the smoothness and continuity of the screening. Moreover, this structure enhances the adaptability of the screen hole 201 to sand with different shapes, and improves the adaptability of the screening. Through the above structure, the screen hole 201 on the sand screening plate 21 can more efficiently screen the sand during the rotation of the sand screening plate 21 with the drum 10.

[0083] It can be understood that the second hole part 201b is connected with the first hole part 201a in a circular arc transition, and the top angle of the second hole part 201b is in a circular arc transition. Specifically, the circular arc transition structure can help avoid stress concentration at the connection between the second hole part 201b and the first hole part 201a, and can enhance the smoothness of the sieve hole 201, reduce the resistance of the sand when passing through the sieve hole 201, avoid dead angles caused by sand adhesion, improve the guiding effect on the sand, and facilitate the sand to pass through the sieve hole 201 more smoothly, and improve the sand screening efficiency. In addition, the design of the circular arc structure can effectively reduce the wear and impact of the sand on the sieve hole 201 during the screening process, and improve the durability of the sand screening plate 21.

[0084] Referring to Figure 1 In the above embodiment, the pet excrement collecting bin further comprises a shell 40, the shell 40 is arranged on the excrement collecting bin 30, and the roller 10 is located in the shell 40. The shell 40 plays a protective role on the roller 10 and other structures, and guarantees the privacy of the pet when defecating.

[0085] Referring to Figure 2 It can be understood that the pet excrement collecting bin further comprises a driving assembly 50, the driving assembly 50 is located at the rear side of the roller 10, the front side of the roller 10 is provided with an entrance and exit for the pet to enter and exit, the driving assembly 50 comprises a driving wheel 51 and a driven wheel 52 which are engaged with each other, the driving wheel 51 is connected with a driving motor, and the driven wheel 52 is connected with the roller 10. The driving assembly 50 drives the roller 10 to rotate, so as to realize different modes of rotating operation.

[0086] The pet excrement collecting bin has a sand pouring mode and a sand changing mode. In the sand pouring mode, referring to Figure 6 、 Figure 10 and Figure 11 , the roller 10 rotates from an initial position ( Figure 6 ) to a sand screening position ( Figure 10 ) in a first direction, so that the sand lump is screened out by the screening assembly 20, and the roller 10 rotates to a sand pouring position ( Figure 11 ) in a second direction (opposite to the first direction), so that the sand pouring port 11 is aligned with the material falling port 31, and the screened sand lump is poured into the excrement collecting bin 30. In the sand changing mode, referring to Figure 6 and Figure 11 , the roller 10 rotates from the initial position ( Figure 6 ) to the sand pouring position ( Figure 11 ) in the second direction, so that the sand pouring port 11 is aligned with the material falling port 31, and the sand is poured into the excrement collecting bin 30.

[0087] Specifically, at the initial position, the sand is located in the sand placement area 12 in the roller 10. After the pet defecates, the sand pouring mode is started, the roller 10 rotates from the initial position to the sand screening position by a first set angle (for example, 180°) in a first direction (for example, clockwise in this example). During the rotation, the sand is at the bottom of the roller 10 due to gravity. The first end 21a of the sand screening plate 21 is scraped to the sand and makes the sand slide to the sand screening plate 21 and be screened out of sand clumps and clean sand (clean sand) along with the rotation of the sand screening plate 21. The clean sand falls from the sieve hole 201 to the first cavity. The sand clumps slide from the second end 21b of the sand screening plate 21 to the bottom of the roller 10 and are located in the second cavity. Then, the roller 10 rotates by a second set angle (for example, 35°) in a second direction (the second direction is opposite to the first direction, for example, counterclockwise in this example) to the sand pouring position. At this time, the sand pouring opening 11 is aligned with the sand falling opening 31, so that the screened sand clumps are poured into the excrement collecting bin 30. In this way, the sand screening and cleaning of the sand clumps can be easily realized, and the remaining sand in the roller 10 can be continuously used.

[0088] When it is necessary to completely replace the sand, the sand changing mode is started, the roller 10 rotates from the initial position to the sand pouring position by a third set angle (for example, 145°) in the second direction. At this time, the sand pouring opening 11 of the roller 10 is aligned with the sand falling opening 31 of the excrement collecting bin 30, so that the sand in the roller 10 is completely poured into the excrement collecting bin 30. In this way, the complete replacement of the sand can be easily realized. Through the above structure, by rotating in the first direction (for example, clockwise) and the second direction (for example, counterclockwise) by different angles to different positions, the state switching of the sand pouring mode and the sand changing mode can be conveniently realized, so that the sand pouring operation (pouring out of the sand clumps) and the sand changing operation (replacement of the sand) can be realized.

[0089] In summary, the excrement collecting bin for pets provided by the utility model can prevent the pet from being injured by the shearing action between the sand pouring opening 11 of the roller 10 and the sand falling opening 31 of the excrement collecting bin 30 by arranging the sand screening assembly 20 in the roller 10 and shielding the sand pouring opening 11 by the sand screening plate 21 beyond the sand blocking plate 22 to prevent the pet from contacting. Thus, the safety threat to the pet caused by the shearing action between the sand pouring opening 11 of the roller 10 and the sand falling opening 31 of the excrement collecting bin 30 can be avoided, the shearing risk during the rotation of the roller 10 is eliminated, the pet can be effectively prevented from being injured during the rotation of the roller 10, the safety hazard is eliminated, the use safety is improved, and the recovery rate of the sand is also improved.

[0090] The above embodiments only exemplarily illustrate the principle and effects of the utility model, and are not used to limit the utility model. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and category of the utility model. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the utility model should be covered by the claims of the utility model.

Claims

1. A pet waste collection bin, characterized by, include: A roller, driven to rotate by a power source, has sand-pouring openings on its circumferential sidewalls; A screening assembly, disposed inside the drum, includes a sand screening plate and a sand baffle plate connected below the sand screening plate. The sand screening plate extends circumferentially along the drum and has a first end and a second end in the extending direction. The sand baffle plate is located at the sand discharge port and forms a sand-collecting structure with the inner wall of the drum. The first end of the sand screening plate abuts against the side wall of the drum. The second end of the sand screening plate extends beyond the sand baffle plate in the extending direction and its projection on the inner wall of the drum covers the sand discharge port. There is a set gap between the second end of the sand screening plate and the inner wall of the drum. The sand screening plate is provided with a plurality of screen holes. The waste collection bin, located below the roller, has a discharge port adapted to the sand discharge port.

2. The pet waste collection bin of claim 1, wherein, The sand baffle and the sand sieve plate divide the inner cavity of the roller into a first cavity and a second cavity, the first cavity corresponding to the sieve hole and the second cavity corresponding to the sand discharge port.

3. The pet waste collection bin of claim 1 or 2, wherein, The height of the set gap is greater than the maximum particle size of the sand.

4. The pet waste collection cartridge of claim 3, wherein, The sand sieving plate includes a sand-shoveling part and an extension part connected together. The sieve holes are disposed on the sand-shoveling part and adjacent to the first end. The sand-blocking plate is connected to the bottom wall of the extension part.

5. The pet waste collection cartridge of claim 3, wherein, The sand screening plate has a continuous S-shaped wave pattern along its extension direction.

6. The pet waste collection cartridge of claim 3, wherein, The two sides of the sand screening plate near the two opposite side walls of the roller are raised, and the middle part is concave.

7. The pet waste collection cartridge of claim 1 or 2, wherein, The sand baffle includes a sand-collecting part and guide parts connected to both ends of the sand-collecting part. The sand-collecting part has a U-shaped structure, and the opening of the U-shaped structure faces the sand discharge port. The two guide parts extend outward in a direction away from the two sides of the sand-collecting part, and the height of the guide parts gradually decreases in a direction away from the sand-collecting part.

8. The pet waste collection cartridge of claim 7, wherein, The connection between the sand-collecting part and the guide part is rounded with an arc transition, and the corner of the U-shaped structure of the sand-collecting part is also rounded with an arc transition.

9. The pet waste collection cartridge of claim 1, wherein, The plurality of sieve holes are evenly spaced and arranged in an array on the sand sieve plate, and at least some of the sieve holes are in the shape of an "I".

10. The pet waste collection cartridge of claim 9, wherein, Along the extension direction of the sand sieve plate, multiple sieve holes are arranged in multiple columns, the sieve holes in adjacent columns are staggered, the adjacent sieve holes in the same column are connected to each other, and the perpendicular bisector of the line connecting the center points of adjacent sieve holes in the same column passes through the center points of the sieve holes in adjacent columns. Alternatively, multiple rows of screen holes are arranged in a direction perpendicular to the extension direction of the screen plate, with the screen holes in adjacent rows staggered, adjacent screen holes in the same row connected to each other, and the perpendicular bisector of the line connecting the center points of adjacent screen holes in the same row passing through the center point of the screen holes in the adjacent row.

11. The pet waste collection cartridge of claim 9, wherein, Each of the sieve holes includes a first hole portion and a second hole portion. The first hole portion and the second hole portion are both rectangular. The first hole portion and the second hole portion are perpendicular to each other. The second hole portion is symmetrically arranged at both ends of the first hole portion and communicates with the first hole portion.

12. The pet waste collection cartridge of claim 11, wherein, The length direction of the second hole is the same as the extension direction of the sand sieve plate.

13. The pet waste collection cartridge of claim 11, wherein, The second hole is connected to the first hole with a rounded transition, and the apex of the second hole is also rounded.

14. The pet waste collection bin of claim 1, wherein, It also includes a housing, which is disposed on the waste collection chamber, and the roller is located inside the housing.

15. The pet waste collection cartridge of claim 1, wherein, The pet excrement collecting bin has a sand discharging mode and a sand replacing mode. In the sand discharging mode, the roller rotates from the initial position to the sand screening position in the first direction to make the sand lumps screened by the screening assembly, and the roller rotates to the sand discharging position in the second direction to align the sand discharging opening with the material falling opening to make the screened sand lumps discharged into the excrement collecting bin. In the sand replacing mode, the roller rotates from the initial position to the sand discharging position in the second direction to align the sand discharging opening with the material falling opening to make the sand material discharged into the excrement collecting bin.

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