Rolling screening device and cat litter box

Abstract

A rolling screening device and a cat litter box. The rolling screening device comprises a roller body (100), a litter storage pad (300), a mounting frame structure (400), and an elastic frame structure (500). The roller body (100) can rotate around its own axis, the inner wall is provided with a screening plate (200), and the screening plate (200) is configured to be driven to screen clumped cat litter and unclumped cat litter when the roller body (100) rotates; the litter storage pad (300) is arranged on the inner wall of the roller body (100), and covers a portion of the inner wall of the roller body (100); the mounting frame structure (400) is fixedly connected to the inner wall of the roller body (100) and is arranged circumferentially around the litter storage pad (300), and the edge of the litter storage pad (300) is fitted at the bottom of the mounting frame structure (400); the elastic frame structure (500) is arranged circumferentially around the litter storage pad (300), a part of the elastic frame structure (500) is sandwiched between the mounting frame structure (400) and the inner wall of the roller body (100), and the other part abuts against the bottom of the mounting frame structure (400) and abuts against the edge of the litter storage pad (300).

Description

Rolling screening device and cat litter box

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on February 29, 2024, with application number 202420383314.3, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of pet products, for example, to a rolling screening device and a cat litter box. Background Art

[0003] A cat litter box with a screening function includes a drum and a housing. The drum is disposed within the housing and is rotatable about its own axis. A litter storage pad is provided within the drum to accommodate the litter. Screen plates and openings are also arranged circumferentially along the inner wall of the drum. As the drum rotates about its axis, the cat litter falls onto the screen plates under the action of gravity. Unagglomerated litter passes through the screen plates and falls below them, while agglomerated litter is retained on the screen plates and then discharged from the drum through the openings.

[0004] In the prior art, there are two main ways to install the litter storage pad on the inner wall of the drum of a cat litter box: one is a fixed method in which the litter storage pad is integrally fixed to the inner wall of the drum, and the other is a detachable method in which the litter storage pad is fixed to the inner wall of the drum. The first installation method is difficult to clean, and once the litter storage pad is damaged, it is difficult to replace. In the second installation method, when the drum rotates, liquid excrement on the inner wall of the drum will leak through the installation gap between the edge of the litter storage pad and the inner wall of the drum, flowing onto the base of the cat litter box below the litter storage pad. This makes the odor difficult to eliminate and also brings inconvenience to cleaning. Furthermore, due to the large installation gap, the mixture of excrement and cat litter may get stuck in the installation gap, making it difficult to clean.

[0005] Summary of the Invention

[0006] The present application provides a rolling screening device, which can reduce the residue or leakage of excrement and facilitate cleaning.

[0007] An embodiment of the present application provides a rolling screening device, comprising:

[0008] A drum body, the drum body being rotatable about its own axis, the inner wall of which is provided with a screening plate, the screening plate being configured to be driven to screen agglomerated cat litter and non-agglomerated cat litter when the drum body rotates;

[0009] A sand storage pad is provided on the inner wall of the drum body and covers a portion of the inner wall of the drum body;

[0010] A mounting frame structure, wherein the mounting frame structure is fixedly connected to the inner wall of the drum body and is arranged around the circumference of the sand storage pad, and the edge of the sand storage pad is clamped on the bottom of the mounting frame structure;

[0011] An elastic frame structure is arranged in a ring around the sand storage pad, a part of the elastic frame structure is clamped between the mounting frame structure and the inner wall of the drum body, and the other part is abutted against the bottom of the mounting frame structure and against the edge of the sand storage pad.

[0012] An embodiment of the present application further provides a cat litter box, which includes a shell and a rolling screening device as described in any one of the above schemes, wherein the drum body is arranged in the shell and can rotate around its own axis relative to the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] FIG1 is a schematic structural diagram of a rolling screening device provided in one embodiment of the present application;

[0014] FIG2 is a schematic diagram of a partial structure of a rolling screening device provided in one embodiment of the present application;

[0015] FIG3 is a structural diagram of a first shell, a sand storage pad, and a mounting frame structure provided in one embodiment of the present application;

[0016] FIG4 is a partial schematic diagram of the connection between the mounting frame structure and the elastic frame structure provided in one embodiment of the present application;

[0017] FIG5 is a schematic internal diagram of a rolling screening device in a normal state provided by an embodiment of the present application;

[0018] FIG6 is a partial enlarged view of the structure marked A in FIG5 ;

[0019] FIG7 is an internal schematic diagram of a rolling screening device in a screening state provided by an embodiment of the present application;

[0020] FIG8 is a partial enlarged view of the structure marked as B in FIG7;

[0021] FIG9 is a schematic diagram of a drum body installed in a housing according to an embodiment of the present application.

[0022] In the figure: 100, drum body; 110, first shell; 120, second shell; 200, screening plate; 300, sand storage pad; 310, convex ring; 400, mounting frame structure; 410, mounting portion; 411, snap-fitting male end; 412, first connecting hole; 420, snap-fitting portion; 500, elastic frame structure; 510, clamping portion; 511, snap-fitting female end; 520, supporting portion; 530, abutting portion; 600, outer shell. DETAILED DESCRIPTION

[0023] In the description of this application, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0024] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0025] In the description of this embodiment, terms such as "upper," "lower," "right," and "left" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0026] This embodiment provides a rolling screening device and a cat litter box. As shown in FIG9 , the cat litter box includes a housing 600 and the rolling screening device provided in this embodiment, wherein the rolling screening device is disposed in the housing 600 .

[0027] Figure 1 is a schematic diagram of the structure of a rolling screening device according to one embodiment of the present application; Figure 2 is a schematic diagram of a portion of the structure of a rolling screening device according to one embodiment of the present application. Referring to Figures 1 and 2, the rolling screening device includes a drum body 100, a screening plate 200, a sand storage pad 300, and a mounting frame structure 400.

[0028] The drum body 100 is disposed within the housing 600 and is rotatable about its own axis. A screening plate 200 is disposed on the inner wall of the drum body 100. Driven by the rotation of the drum body 100, the screening plate 200 is capable of separating agglomerated cat litter from non-agglomerated cat litter. Agglomerated cat litter is blocked by the screening plate 200, while non-agglomerated cat litter passes through the screening plate 200 and falls into the drum body 100. The litter storage pad 300 is disposed on the inner wall of the drum body 100, covering a portion of the inner wall of the drum body 100. This pad is configured to separate the inner wall of the drum body 100 from the cat litter, thereby protecting the drum body 100 and preventing the cat litter from adhering to the inner wall of the drum body 100. The mounting frame structure 400 is fixedly connected to the inner wall of the drum body 100 and is circumferentially arranged on the sand storage pad 300. The edge of the sand storage pad 300 is clamped on the bottom of the mounting frame structure 400. The sand storage pad 300 can be stably fixed to the drum body 100 through the mounting frame structure 400.

[0029] FIG3 is a schematic structural diagram of the first shell 110, the sand storage pad 300, and the mounting frame structure 400 provided in an embodiment of the present application. Referring to FIG1-FIG3, the drum body 100 includes a first shell 110 and a second shell 120 that are detachably connected by a snap-fit ​​structure. The sand storage pad 300 and the mounting frame structure 400 are disposed on the inner wall of the first shell 110, and the screening plate 200 is disposed on the inner wall of the second shell 120 and extends toward the direction of the first shell 110. When the drum body 100 is in a normal state, the first shell 110 is located below the second shell 120 in the direction of gravity, as shown in FIG1.

[0030] FIG4 shows a partial schematic diagram of the connection between the mounting frame structure 400 and the elastic frame structure 500 provided in an embodiment of the present application. Referring to FIG4 , the mounting frame structure 400 includes an integrally formed mounting portion 410 and a clamping portion 420. The mounting portion 410 is fixedly connected to the drum body 100, and the clamping portion 420 is integrally formed on a side of the mounting portion 410 away from the inner wall of the drum body 100, and is disposed at an angle. A convex ring 310 is provided on the edge of the sand storage pad 300. The convex ring 310 can be clamped within the angle formed by the clamping portion 420 and the mounting portion 410. In other words, the mounting portion 410 can press against the convex ring 310 in a direction perpendicular to the bottom of the sand storage pad 300, and the clamping portion 420 can clamp the convex ring 310 in the circumferential direction of the sand storage pad 300, thereby ensuring the stability of the sand storage pad 300.

[0031] In one embodiment, the upper end surface of the mounting portion 410 is inclined, tilting in a direction approaching the geometric center of the mounting portion 410, and the upper end surface of the mounting portion 410 gradually approaches the litter storage pad 300. This arrangement can directly guide liquid excrement on the inner wall of the drum body 100 to the cat litter or the litter storage pad 300, reducing the time the liquid stays on the mounting portion 410.

[0032] Continuing with Figure 4 , the rolling screening device further includes an elastic frame structure 500. The elastic frame structure 500 is circumferentially disposed around the sand storage pad 300 and abuts against the mounting frame structure 400. A portion of the elastic frame structure 500 is sandwiched between the mounting frame structure 400 and the inner wall of the drum body 100, while another portion rests against the bottom of the mounting frame structure 400 and abuts against the edge of the sand storage pad 300. In this embodiment, the elastic frame structure 500 can be made of a soft rubber material.

[0033] Figure 5 shows an internal schematic diagram of a rolling screening device provided in an embodiment of the present application in a normal state; Figure 6 shows a partial enlarged view of the structure marked A in Figure 5; Figure 7 shows an internal schematic diagram of a rolling screening device provided in an embodiment of the present application in a screening state; Figure 8 shows a partial enlarged view of the structure marked B in Figure 7. Referring to Figures 4 to 8, the elastic frame structure 500 includes an integrally formed clamping portion 510 and a supporting portion 520. The clamping portion 510 is clamped between the outer side of the mounting portion 410 and the inner wall of the drum body 100. The supporting portion 520 abuts against the bottom of the mounting portion 410, and the end of the supporting portion 520 abuts against the convex ring 310. That is to say, the clamping portion 510 can be interference fit with the mounting portion 410 and the inner wall of the drum body 100, and the end of the support portion 520 can be interference fit with the convex ring 310 on the sand storage pad 300 and the bottom of the mounting portion 410, so as to prevent the occurrence of installation gaps between the mounting frame structure 400 and the inner wall of the drum body 100, and between the mounting frame structure 400 and the edge of the sand storage pad 300, thereby preventing excrement from remaining in the installation gaps or leaking from the installation gaps.

[0034] In one embodiment, a snap-fitting male end 411 is provided on the side of the mounting portion 410 facing the clamping portion 510, and a snap-fitting female end 511 is provided on the side of the clamping portion 510 facing the mounting portion 410. The snap-fitting male end 411 and the snap-fitting female end 511 are in a stepped structure and can be interlocked with each other to improve the connection reliability of the mounting frame structure 400 and the elastic frame structure 500.

[0035] In other embodiments, the mounting portion 410 is provided with a plurality of first connection holes 412 at intervals, and a mounting platform is provided within the drum body 100. The mounting platform has a plurality of second connection holes formed at positions corresponding to the mounting portion 410, with the first connection holes 412 corresponding to the second connection holes one by one. Connecting bolts pass through the support portion 520 and connect to the first connection holes 412 and the second connection holes to ensure secure mounting of the mounting portion 410 on the mounting platform.

[0036] In other embodiments, the mounting frame structure 400 and the drum body 100 can be connected in the following manner. For example, a plurality of insertion holes are spaced apart on the mounting portion 410, and a plurality of insertion posts are provided on the mounting platform of the drum body 100 corresponding to the mounting portion 410. The insertion posts extend through the support portion 520 and are inserted into the insertion holes in a one-to-one correspondence. This installation method is more convenient and can improve the efficiency of disassembly, cleaning, and assembly of the entire rolling screening device.

[0037] In one embodiment, the elastic frame structure 500 further includes abutment 530. The abutment 530 is integrally formed at one end of the support portion 520 away from the clamping portion 510 and is capable of abutting against the protruding ring 310. The thickness of the abutment 530 is greater than that of the support portion 520. This arrangement further reduces the gap between the elastic frame structure 500 and the protruding ring 310 and improves the stability of the abutment between the elastic frame structure 500 and the protruding ring 310.

Claims

1. Rolling screening device, including: A drum body (100) is rotatable about its own axis, and a screening plate (200) is provided on the inner wall thereof, wherein the screening plate (200) is configured to be driven to screen agglomerated cat litter and non-agglomerated cat litter when the drum body (100) rotates; a sand storage pad (300), the sand storage pad (300) being arranged on the inner wall of the drum body (100) and covering a portion of the inner wall of the drum body (100); a mounting frame structure (400), the mounting frame structure (400) being fixedly connected to the inner wall of the drum body (100) and being arranged in a ring around the circumference of the sand storage pad (300), the edge of the sand storage pad (300) being clamped on the bottom of the mounting frame structure (400); An elastic frame structure (500) is provided around the circumference of the sand storage pad (300), a portion of the elastic frame structure (500) is sandwiched between the mounting frame structure (400) and the inner wall of the drum body (100), and another portion of the elastic frame structure (500) is abutted against the bottom of the mounting frame structure (400) and against the edge of the sand storage pad (300).

2. The rolling screening device according to claim 1, wherein: The mounting frame structure (400) includes a mounting portion (410), and the mounting portion (410) is fixedly connected to the drum body (100); The elastic frame structure (500) includes a clamping portion (510), and the clamping portion (510) is clamped between the mounting portion (410) and the inner wall of the drum body (100).

3. The rolling screening device according to claim 2, wherein: The upper end surface of the mounting portion (410) is tilted and tilted in a direction close to the geometric center of the mounting portion (410), and the upper end surface of the mounting portion (410) gradually approaches the sand storage pad (300).

4. The rolling screening device according to claim 2, wherein: A snap-fitting male end (411) is provided on one side of the mounting portion (410) facing the clamping portion (510), and a snap-fitting female end (511) is provided on one side of the clamping portion (510) facing the mounting portion (410), and the snap-fitting male end (411) and the snap-fitting female end (511) are engaged with each other.

5. The rolling screening device according to claim 2, wherein: The mounting frame structure (400) further comprises a clamping portion (420), wherein the clamping portion (420) is integrally formed with the mounting portion (410); a convex ring (310) is provided on the edge of the sand storage pad (300), and the convex ring (310) is clamped on a side of the clamping portion (420) close to the inner wall of the drum body (100); The elastic frame structure (500) further includes a support portion (520), which is integrally formed with the clamping portion (510) and abuts against the bottom of the mounting portion (410), and an end portion of the support portion (520) abuts against the convex ring (310).

6. The rolling screening device according to claim 5, wherein: The elastic frame structure (500) further comprises a supporting portion (530), which is integrally formed at one end of the supporting portion (520) away from the clamping portion (510) and abuts against the convex ring (310), and the thickness of the supporting portion (530) is greater than the thickness of the supporting portion (520).

7. The rolling screening device according to claim 2, wherein: The mounting portion (410) is provided with a plurality of first connection holes (412) at intervals, and the drum body (100) is provided with a plurality of second connection holes at positions corresponding to the mounting portion (410), and the first connection holes (412) correspond one-to-one to the second connection holes; The elastic frame structure (500) further includes a supporting portion (520), which is integrally formed with the clamping portion (510) and abuts against the bottom of the mounting portion (410), and a connecting bolt passes through the supporting portion (520) and is connected to the first connecting hole (412) and the second connecting hole.

8. The rolling screening device according to claim 2, wherein: The mounting portion (410) is provided with a plurality of plug-in holes at intervals, and the drum body (100) is provided with a plurality of plug-in posts at positions corresponding to the mounting portion (410); The elastic frame structure (500) further includes a supporting portion (520), which is integrally formed with the clamping portion (510) and abuts against the bottom of the mounting portion (410), and the plug-in column passes through the supporting portion (520) and is inserted into the plug-in hole in a one-to-one correspondence.

9. The rolling screening device according to any one of claims 1 to 8, wherein: The drum body (100) comprises a first shell (110) and a second shell (120) which are detachably fastened together; the sand storage pad (300), the mounting frame structure (400) and the elastic frame structure (500) are arranged on the inner wall of the first shell (110); the screening plate (200) is arranged on the inner wall of the second shell (120); and the first shell (110) is arranged to be located below the second shell (120) in the direction of gravity when the drum body (100) is in a normal state.

10. A cat litter box comprising a housing (600) and the rolling screening device according to any one of claims 1 to 9, wherein the drum body (100) is arranged in the housing (600) and can rotate around its own axis relative to the housing (600).

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