Bottom protection structure of cat litter basin

Abstract

The invention discloses a bottom protection structure of a cat litter basin, which belongs to the field of cat litter basin connection and comprises a bottom connection supporting box detachably arranged at the bottom of a cat litter basin base and corresponding to an opening position of the cat litter basin base, and lapping plates and clamping plates are respectively arranged on two sides and the rear end of the bottom connection supporting box; the two side supporting mechanisms are symmetrically arranged at the bottom of the cat litter basin base and used for guiding the lap joint plate to move horizontally and supporting the bottom connection supporting box; the limiting mechanism is arranged at the bottom of the cat litter basin base; the detachable bottom connection supporting box is arranged at the position, corresponding to the opening, of the bottom of the cat litter basin base, excrement and fine sand seeping from a splicing seam of a cat litter basin ball bin can be collected in a centralized mode, and pollution to the ground and the outside of the base is avoided; through detachable connection of the bottom connection supporting box, the dismounting process is smooth and labor-saving, the cat litter box can be cleaned only by dismounting the bottom connection supporting box without dismounting the ball bin of the cat litter box, a user can conveniently take out the cat litter box regularly for cleaning, the cleaning burden is reduced, and bacterium breeding, peculiar smell generation and influence on environmental sanitation can be prevented.

Description

Technical Field

[0001] This invention relates to the field of cat litter box technology, and more specifically, to a bottom protection structure for a cat litter box. Background Technology

[0002] With the increasing popularity of pet ownership, litter boxes have become an essential item for cats' daily lives, and their user experience and hygiene performance have received widespread attention.

[0003] Patent CN116868899A discloses a smart litter box, which mainly consists of a base and a ball chamber that can rotate clockwise and counterclockwise on the base. Because the ball chamber is pieced together, after prolonged use or under certain circumstances, due to the cat's movement in and out, friction from the ball chamber's rotation, and the inherent gaps in the joints, the cat's excrement and fine litter may seep out from the seams of the ball chamber, falling onto the base area outside the ball chamber and even directly contaminating the ground. This issue increases the cleaning burden on users. Most existing litter box bases are one-piece structures, requiring frequent disassembly and reassembly for cleaning. This is inconvenient, time-consuming, and energy-draining. Furthermore, litter boxes that fall into the one-piece base area are not easily noticed. If not cleaned in time, they can easily breed bacteria and produce odors, seriously affecting the hygiene of the environment and reducing the user experience of the litter box.

[0004] Therefore, it is necessary to provide a bottom protection structure for a cat litter box to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a bottom protection structure for a cat litter box to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A bottom cover structure for a cat litter box, installed at the bottom of a cat litter box base, wherein the bottom of the cat litter box base has an opening, comprising: The bottom support box is detachably installed at the bottom of the litter box base and corresponds to its opening position. The bottom support box is provided with overlapping plates and locking plates on both sides and the rear end, respectively. Two side support mechanisms are symmetrically arranged at the bottom of the litter box base to guide the horizontal movement of the connecting plate and support the bottom support box; A limiting mechanism is provided at the bottom of the litter box base to cooperate with the positioning plate and limit the position of the bottom support box.

[0007] Furthermore, the side support mechanism includes: A support frame is provided at the bottom of the litter box base, and the inner side wall of the support frame is provided with a support plate for supporting the overlapping plate.

[0008] Furthermore, a first elastic element is provided between the bottom of the support plate and the bottom wall of the support frame; The support frame has a vertical opening, and a height rod connected to the support plate is slidably installed in the vertical opening.

[0009] Furthermore, a pointer is provided at the end of the height bar away from the support plate, and a scale plate is installed on the outer wall of the litter box base corresponding to the pointer.

[0010] Furthermore, the end of the positioning plate is provided with an outward extension rod, and the limiting mechanism includes: A limiting seat is provided at the bottom of the litter box base. The limiting seat is provided with a rear baffle for abutting the bottom support box. The limiting seat is provided with a through hole that is adapted to the locking plate. The limiting seat is provided with a blocking component for preventing the extension rod from moving.

[0011] Furthermore, the blocking assembly includes an outer jacket plate, inside which is provided a resiliently extendable stop block, the side of the stop block facing the limiting seat being inclined.

[0012] Furthermore, the outer jacket is provided with an inner groove that is slidably connected to the stop block, and a second elastic element is provided between the bottom wall of the inner groove and the inner end of the stop block.

[0013] Furthermore, the outer wall of the outer jacket is provided with a sliding groove that communicates with the recessed groove, and a push rod connected to the stop block is slidably connected to the inner wall of the sliding groove.

[0014] Furthermore, the outer wall of the outer jacket is also provided with a support plate, and a limiting plate is rotatably connected to the support plate.

[0015] Furthermore, the bottom of the litter box base is provided with a threaded post, the bottom of the threaded post is equipped with a ball bearing, and the outer wall of the threaded post is threadedly connected with a support cylinder.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention provides a detachable bottom tray at the corresponding opening on the bottom of the litter box base. This tray can collect excrement and fine sand seeping from the joint of the litter box's ball compartment, preventing contamination of the ground and the outside of the base, and effectively improving the hygiene of the usage environment. Furthermore, through the cooperation of the bottom tray with the side support mechanism and the limiting mechanism, not only is the precise positioning of the bottom tray achieved, but the stability of the bottom tray during use is also ensured, preventing displacement or detachment during use, resulting in good structural stability.

[0017] 2. This invention features a detachable bottom tray, making disassembly smooth and effortless. It eliminates the need to remove the litter box's ball compartment or disassemble the base; cleaning is simply a matter of removing the bottom tray. This allows users to regularly remove and clean the litter box, reducing cleaning burden and greatly improving the ease of cleaning the litter box base. It also avoids the problem of litter and fine litter falling into the litter box being difficult to detect. Cleaning by separately removing the bottom tray prevents bacterial growth, odor, and environmental hygiene.

[0018] 3. In this invention, as excrement and fine litter gradually fall into the bottom tray of the litter box, the increased weight of the bottom tray causes it to gradually press down on the support plate. This support plate then moves the height bar downwards. The weight-bearing capacity of the bottom tray can be directly observed by the lowering position of the height bar. This allows users to intuitively understand the approximate amount of waste in the bottom tray without removing it, making it suitable for different users to clean at their preferred times. Furthermore, the lowering position of the height bar also promptly reminds users, preventing delayed cleaning, bacterial growth, and odors, thus improving the litter box user experience.

[0019] 4. This invention integrates the functions of receiving waste, supporting, positioning, and adjusting into one unit. The structure is compact and can be installed and used without major modifications to the main structure of the litter box. The connection method of each component is simple and reliable, the production and processing difficulty is low, the cost is controllable, and it has good promotion and application value. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the bottom protection structure of the cat litter box base of the present invention; Figure 2 This is a structural schematic diagram of the bottom protection structure of the present invention from another side view; Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a partial structural diagram of the litter box base after the bottom support box has been removed according to the present invention. Figure 5 for Figure 4 Enlarged structural diagram at point B; Figure 6 This is a top view structural diagram of the bottom protection mechanism of the cat litter box base of the present invention; Figure 7 for Figure 6 Enlarged structural diagram at point C; Figure 8 for Figure 6 Enlarged structural diagram at point D; Figure 9 This is a cross-sectional view of the outer jacket of the present invention; Figure 10 This is a three-dimensional structural diagram of the bottom support box of the present invention.

[0021] Explanation of the labels in the diagram: 1. Litter box base; 2. Bottom tray box; 3. Overlap plate; 4. Positioning plate; 5. Side support mechanism; 51. Support frame; 52. Support plate; 6. Limiting mechanism; 61. Limiting seat; 62. Rear baffle; 63. Through-hole; 64. Blocking assembly; 641. Outer plate; 642. Stop block; 7. First elastic element; 71. Telescopic spring; 72. Telescopic element; 8. Vertical opening; 9. Height rod; 10. Pointer rod; 11. Scale plate; 12. Outer extension rod; 13. Inner groove; 14. Second elastic element; 15. Moving groove; 16. Push rod; 17. Support plate; 18. Limiting plate; 19. Threaded column; 20. Ball bearing; 21. Support cylinder; 22. Roller. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figure 1-10 A bottom protection structure for a cat litter box, installed at the bottom of a cat litter box base 1, wherein the bottom of the cat litter box base 1 has an opening, including: The bottom support box 2 is detachably installed at the bottom of the litter box base 1 and corresponds to its opening position. The bottom support box 2 is provided with a connecting plate 3 and a locking plate 4 on both sides and the rear end, respectively. Two side support mechanisms 5 are symmetrically arranged at the bottom of the litter box base 1 to guide the horizontal movement of the connecting plate 3 and support the bottom support box 2. The limiting mechanism 6 is located at the bottom of the litter box base 1 and is used to cooperate with the positioning plate 4 to limit the position of the bottom support box 2.

[0024] When in use, an opening adapted to the bottom of the litter box base 1 is pre-made to serve as a channel for receiving and cleaning leaked excrement and fine sand. When installing the bottom tray 2, align the bottom tray 2 with the opening and push it horizontally along the side support mechanism 5 using the side overlapping plates 3. The side support mechanism 5 can support the bottom tray 2. After the bottom tray 2 is pushed into place, it can be locked in place by the locking plate 4. That is, the position of the bottom tray 2 can be limited by the limiting mechanism 6.

[0025] By setting a detachable bottom tray 1 at the corresponding opening position at the bottom of the litter box base 1, the excrement and fine sand seeping out from the joint of the litter box ball compartment can be collected in a concentrated manner, avoiding pollution of the ground and the outside of the base, and effectively improving the hygiene of the usage environment. Furthermore, through the cooperation of the bottom tray 2, the side support mechanism 4, and the limiting mechanism 6, not only is the precise positioning of the bottom tray 2 achieved, but the stability of the bottom tray 2 during use is also ensured, preventing displacement or detachment during use. The structure has good stability and allows for detachable connection of the bottom tray 1. The disassembly process is smooth and effortless, without the need to remove the ball compartment of the litter box or disassemble the litter box base 1. Only the bottom tray 2 needs to be removed for cleaning, making it convenient for users to remove it regularly for thorough cleaning, reducing the cleaning burden and greatly improving the cleaning convenience of the litter box base. It avoids the problem that excrement and fine sand that fall into the current litter box are not easily detected. By cleaning the bottom tray 2 separately, bacteria growth, odor, and environmental hygiene can be prevented, significantly improving the user experience of the litter box.

[0026] The side support mechanism 4, in cooperation with the overlapping plate 3 of the bottom tray 2, provides stable horizontal support for the bottom tray 2; the limiting mechanism 6, by blocking and limiting the positioning plate 4, achieves precise positioning of the bottom tray 2, preventing it from shifting or falling out during the use of the litter box, thus ensuring strong structural stability.

[0027] For preferred options, please refer to [link / reference]. Figure 2 , Figure 4 and Figure 6-7 The side support mechanism 5 includes: A support frame 51 is installed at the bottom of the litter box base 1, and a support plate 52 for supporting the overlapping plate 3 is provided on the inner side wall of the support frame 51.

[0028] Specifically, the support frame 51 has a U-shaped structure and can be connected to the bottom of the litter box base 1 by welding or bolts. When installing the bottom support box 2, place the two side overlapping plates 3 on the support plate 52 and push it in horizontally along the support plate 52.

[0029] The support plate 52 directly supports the overlapping plate 3, achieving horizontal support for the bottom support box 2, preventing tilting after installation, clearly defining the support stress point, and improving the structural stability of the bottom support box 2 after bearing dirt; moreover, the horizontally set support plate 52 provides guidance for the bottom support box 2, ensuring that it moves along the preset trajectory during installation and avoiding jamming.

[0030] For preferred options, please refer to [link / reference]. Figure 2-6 A first elastic element 7 is provided between the bottom of the support plate 52 and the bottom wall of the support frame 51; The support frame 51 has a vertical opening 8, and a height rod 9 connected to the support plate 52 is slidably installed in the vertical opening 8.

[0031] Firstly, when the bottom litter box 2 is installed and in use, excrement and fine litter in the ball chamber of the litter box will gradually fall into the bottom litter box 2. As the bottom litter box 2 accumulates more and more litter, it will gradually press down on the support plate 52 due to the increased weight. The support plate 52, under pressure, will compress the first elastic element 7, and the gradual downward movement of the support plate 52 will cause the height bar 9 to move down along the vertical opening 8. The weight-bearing capacity of the bottom litter box 2 can be directly observed by observing the downward position of the height bar 9. In other words, users can clearly understand the approximate amount of dirt inside the bottom litter box 2 without removing it. This allows users to choose the appropriate height for cleaning the bottom litter box 2 according to their own needs, making it suitable for different users to clean at their own suitable time. Moreover, the downward position of the height bar 9 can also promptly remind users, avoiding the phenomenon of untimely cleaning, bacterial growth, and odor, making it more hygienic and improving the user experience of the litter box.

[0032] Secondly, the first elastic element 7 can buffer the impact force when the bottom tray 2 is installed and the vibration when the litter box is used, reduce the hard collision of the bottom tray 2, extend its service life, and at the same time offset the shaking caused by slight unevenness of the ground, and improve the stability of placement.

[0033] Preferably, the support plate 52 is also rotatably equipped with multiple rollers 22. With this design, when the overlapping plate 3 of the bottom receiving box 2 moves along the support plate 52, the overlapping plate 3 drives the rollers 22 to roll. The rollers 22 can reduce the friction when the overlapping plate 3 moves on the support plate 52, making the installation and disassembly of the bottom receiving box 2 smoother.

[0034] Preferably, the first elastic element 7 in this solution includes a telescopic spring 71 and a telescopic element 72. The telescopic element 72 can be a damper or a telescopic rod. The telescopic element 72 can further improve the stability of the support plate 52 under pressure and movement, that is, improve the stability of the bottom support box 2.

[0035] For preferred options, please refer to [link / reference]. Figure 1-2 and Figure 4-6 A pointer rod 10 is provided at the end of the height rod 9 away from the support plate 52, and a scale plate 11 is installed on the outer wall of the litter box base 1 at the corresponding pointer rod 10.

[0036] With this design, when the bottom tray 2 receives dirt and moves downwards, it causes the support plate 52 to move downwards. The support plate 52 will then cause the height rod 9 and the pointer rod 10 to move downwards. Through the cooperation of the pointer rod 10 and the scale plate 11, the height change of the support plate 52 can be visualized. This allows for a more intuitive observation and understanding of the descent height of the bottom tray 2, making it easier for users to choose the appropriate time to clean and also improving the user's ability to prevent untimely cleaning.

[0037] In this embodiment, preferably, please refer to [reference needed]. Figure 1-4 , Figure 6 and Figure 8-10 The end of the positioning plate 4 is provided with an extension rod 12, and the limiting mechanism 6 includes: The limiting seat 61 is located at the bottom of the litter box base 1. The limiting seat 61 is provided with a rear baffle 62 for abutting the bottom receiving box 2. The limiting seat 61 is provided with a through hole 63 that is compatible with the locking plate 4. The limiting seat 61 is provided with a blocking component 64 for preventing the extension rod 12 from moving.

[0038] Specifically, the limiting seat 61 is fixed to the bottom rear end of the litter box base 1. When installing the bottom receiving box 2, the bottom receiving box 2 is moved horizontally along the support plate 52. The bottom receiving box 2 will drive the locking plate 4 to move together. Finally, the locking plate 4 will pass through the through hole 63 of the limiting seat 61 until the rear end of the bottom receiving box 2 abuts against the rear baffle 62. At this time, the blocking component 64 locks the extension rod 12, thereby restricting the reverse movement of the locking plate 4, completing the limiting of the bottom receiving box 2, preventing the bottom receiving box 2 from falling out on its own during use, and improving the structural stability.

[0039] The rear baffle 62 precisely limits the pushing stroke of the bottom bracket box 2, ensuring a uniform installation position and avoiding over-pushing or under-pushing. The through-hole 63 adapts to the locking plate 4, playing a preliminary positioning role. The blocking component 64 cooperates with the extension rod 12 to achieve secondary locking, providing double protection against the bottom bracket box 2 falling off.

[0040] For preferred options, please refer to [link / reference]. Figure 6 and Figure 8-10 The blocking component 64 includes an outer plate 641, and an elastically retractable stop 642 is provided inside the outer plate 641. The side of the stop 642 facing the limiting seat 61 is inclined.

[0041] Specifically, when the bottom receiving box 2 pushes the positioning plate 4 and the extension rod 12 in, the extension rod 12 will press the inclined surface of the stop block 642, causing the stop block 642 to retract; after the extension rod 12 has completely passed through the stop block 642, the stop block 642 will reset and prevent the extension rod 12 from moving in the opposite direction through the flat end of the stop block 642, that is, prevent the extension rod 12 from retracting.

[0042] The inclined design of the stop 642 enables the "push-in automatic locking" of the positioning plate 4 and the extension rod 12, eliminating the need for manual operation and improving installation efficiency. Furthermore, the stop 642 achieves locking through a mechanical structure, which results in less wear and a longer service life compared to structures such as snap-fit ​​mechanisms.

[0043] For preferred options, please refer to [link / reference]. Figure 8-9 An inner groove 13 is provided inside the outer plate 641, which is slidably connected to the stop block 642. A second elastic member 14 is provided between the bottom wall of the inner groove 13 and the inner end of the stop block 642.

[0044] With this design, the second elastic element 14 in this scheme can be a spring. When the extension rod 12 presses the stop block 642, the stop block 642 compresses the second elastic element 14 and retracts into the recessed groove 13. After the extension rod 12 passes through, the second elastic element 14 releases its elastic force and pushes the stop block 642 to reset and lock.

[0045] The second elastic element 14 provides stable reset power for the stop 642, ensuring accurate and fast locking action and avoiding jamming; the recessed groove 13 not only limits the sliding trajectory of the stop 642, but also provides installation space for the second elastic element 14, resulting in a compact structure; the elastic reset design requires no additional energy, relies on mechanical elasticity to achieve cyclic use, has low maintenance costs, and is suitable for frequent disassembly and assembly scenarios.

[0046] In this embodiment, preferably, please refer to [reference needed]. Figure 8-9 The outer wall of the outer jacket 641 is provided with a sliding groove 15 that communicates with the inner recess 13, and the inner wall of the sliding groove 15 is slidably connected with a push rod 16 that is connected to the stop block 642.

[0047] With this design, when it is necessary to disassemble the bottom connector box 2, push the push rod 16 along the sliding groove 15. The push rod 16 will drive the stop block 642 to retract into the recessed groove 13, thereby removing the obstruction to the extension rod 12. Then the bottom connector box 2 can be pulled out to achieve disassembly.

[0048] By cooperating with the push rod 16 and the sliding groove 15, the stop block 642 can be manually and precisely controlled, and the unlocking operation is simple and requires no tools. In addition, the sliding groove 15 can also limit the movement range of the push rod 16 to avoid excessive pushing and damage to the second elastic element 14, thus protecting the structural integrity. The exposed push rod 16 makes it easy for users to quickly find the unlocking part, improving the convenience of operation and solving the problem of cumbersome unlocking of traditional locking structures.

[0049] In this embodiment, preferably, please refer to [reference needed]. Figure 8 The outer wall of the outer jacket 641 is also provided with a support plate 17, and a limiting plate 18 is rotatably connected to the support plate 17. The limiting plate 18 is rotatably connected to the support plate 17 through a rotating shaft. This rotating shaft can be a damped rotating shaft to improve the stability of the limiting plate 18.

[0050] With this design, when the push rod 16 moves the stop block 642 and causes it to retract completely into the recessed groove 13, the push rod 16 is now in a position past the limiting plate 18. Then, the limiting plate 18 is rotated to block the push rod 16. Figure 8 Taking the state as an example, after the push rod 16 is moved to the right side of the limiting plate 18, the limiting plate 18 is rotated so that it turns from top to bottom. The limiting plate 18 blocks the reset of the push rod 16, which makes it easy to disassemble and remove the extension rod 12 and the locking plate 4. That is, the user does not need to push the push rod 16 at all times during disassembly, making the operation more convenient.

[0051] In this embodiment, preferably, please refer to [reference needed]. Figure 1-2 and Figure 4 The bottom of the litter box base 1 is provided with a threaded post 19, and a ball bearing 20 is installed at the bottom of the threaded post 19. A support cylinder 21 is threadedly connected to the outer wall of the threaded post 19.

[0052] With this design, when the litter box is placed in the designated position for use, the support cylinder 21 is rotated to move up / down along the threaded post 19. Eventually, the support cylinder 21 moves down beyond the ball bearing 20, at which point it comes into contact with the ground, thus providing overall support for the litter box and improving its stability.

[0053] When the litter box needs to be moved or transferred, the support cylinder 21 can be rotated to move it upward until the ball bearing 20 at the bottom of the threaded post 19 is exposed. Then, the ball bearing 20 is brought into contact with the ground, and the litter box can be moved by the rolling of the ball bearing 20. This greatly reduces the friction of moving the litter box and saves more time and effort.

[0054] It should be understood that the examples and embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Those skilled in the art can make various modifications or changes based on them. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the protection scope of the invention.

[0055] It should be noted that if the embodiments of the present invention involve directional indicators such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicators will also change accordingly.

[0056] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, "multiple" refers to two or more. Moreover, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

Claims

1. A bottom protection structure for a cat litter box, installed at the bottom of a cat litter box base (1), wherein the bottom of the cat litter box base (1) has an opening, characterized in that, include: The bottom support box (2) is detachably set at the bottom of the litter box base (1) and corresponding to its opening position. The bottom support box (2) is provided with a connecting plate (3) and a locking plate (4) on both sides and the rear end respectively. Two side support mechanisms (5) are symmetrically arranged at the bottom of the litter box base (1) to guide the horizontal movement of the connecting plate (3) and support the bottom support box (2); The limiting mechanism (6) is located at the bottom of the litter box base (1) and is used to cooperate with the card plate (4) and limit the position of the bottom support box (2).

2. The bottom protection structure of a cat litter box according to claim 1, characterized in that, The side support mechanism (5) includes: A support frame (51) is provided at the bottom of the litter box base (1), and the inner side wall of the support frame (51) is provided with a support plate (52) for supporting the overlapping plate (3).

3. The bottom protection structure of a cat litter box according to claim 2, characterized in that, A first elastic element (7) is provided between the bottom of the support plate (52) and the bottom wall of the support frame (51); The support frame (51) has a vertical opening (8), and a height rod (9) connected to the support plate (52) is slidably provided in the vertical opening (8).

4. The bottom protection structure of a cat litter box according to claim 3, characterized in that, A pointer rod (10) is provided at the end of the height rod (9) away from the support plate (52), and a scale plate (11) is installed on the outer wall of the litter box base (1) corresponding to the pointer rod (10).

5. The bottom protection structure of a cat litter box according to claim 1, characterized in that, The end of the positioning plate (4) is provided with an extension rod (12), and the limiting mechanism (6) includes: A limiting seat (61) is provided at the bottom of the litter box base (1). The limiting seat (61) is provided with a rear baffle (62) for abutting the bottom support box (2). The limiting seat (61) is provided with a through hole (63) that is compatible with the locking plate (4). The limiting seat (61) is provided with a blocking component (64) for preventing the extension rod (12) from moving.

6. The bottom protection structure of a cat litter box according to claim 5, characterized in that, The blocking assembly (64) includes an outer plate (641) with an elastically retractable stop (642) inside the outer plate (641), and the side of the stop (642) facing the limiting seat (61) is inclined.

7. The bottom protection structure of a cat litter box according to claim 6, characterized in that, The outer sleeve plate (641) has an inner groove (13) that is slidably connected to the stop block (642), and a second elastic element (14) is provided between the bottom wall of the inner groove (13) and the inner end of the stop block (642).

8. The bottom protection structure of a cat litter box according to claim 7, characterized in that, The outer wall of the outer jacket (641) is provided with a sliding groove (15) that communicates with the recessed groove (13), and the inner wall of the sliding groove (15) is slidably connected with a push rod (16) that is connected to the stop block (642).

9. The bottom protection structure of a cat litter box according to claim 8, characterized in that, The outer wall of the outer jacket (641) is also provided with a support plate (17), and a limiting plate (18) is rotatably connected to the support plate (17).

10. The bottom protection structure of a cat litter box according to claim 1, characterized in that, The bottom of the litter box base (1) is provided with a threaded post (19), and a ball bearing (20) is installed at the bottom of the threaded post (19). A support cylinder (21) is threadedly connected to the outer wall of the threaded post (19).

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