Cat litter basin

Abstract

The utility model discloses a cat litter basin which comprises a base and a cat bin arranged above the base, the base comprises a lower cover and an installation support connected to the bottom of the cat bin, the installation support is movably connected to the top of the lower cover, a pressure sensor is arranged between the installation support and the lower cover, and the pressure sensor is fixed to the bottom of the installation support and abuts against the lower cover. According to the cat litter box, the pressure sensor is installed at the bottom of the installation support and is only connected with the lower cover in an abutting mode, so that in the process of transportation or carrying of the cat litter box, even if the cat litter box topples over or is caused by other reasons, the cat litter box is not prone to falling off. As a result, one of the mounting bracket and the lower cover is impacted in the horizontal or vertical direction to move in the separated direction, the pressure sensor can move along with the mounting bracket, and the mounting bracket and the lower cover do not pull the pressure sensor in the two directions at the same time to cause irreversible damage to the pressure sensor. The pressure sensor is protected, and the service life of the pressure sensor is prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of pet appliances, and particularly relates to a cat litter box. Background Art

[0002] At present, most automatic cat litter boxes on the market identify whether a cat enters or leaves the cat bin by setting a pressure sensor on the base at the bottom of the cat bin for weighing to achieve various functions. However, the existing pressure sensor is locked with the upper shell and the lower shell of the base respectively through locking screws. During the transportation or handling of the cat litter box, if the cat litter box is tilted, causing the upper shell and the lower shell to move in the direction of separation, the upper shell and the lower shell will simultaneously pull the pressure sensor in two opposite directions, causing irreversible damage to the pressure sensor. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a cat litter box to solve the problem that the pressure sensor is easily damaged during transportation and handling.

[0004] To solve the above technical problem, the utility model adopts the following technical scheme: A cat litter box includes a base and a cat bin arranged above the base. The base includes a lower cover and an installation bracket connected to the bottom of the cat bin. The installation bracket is movably connected to the top of the lower cover. A pressure sensor for monitoring the weight change of the cat bin is arranged between the installation bracket and the lower cover. The pressure sensor is fixed to the bottom of the installation bracket and abuts against the lower cover. The technical scheme has the following technical effects:

[0005] By arranging a pressure sensor between the movably connected installation bracket and the lower cover, when a cat enters or leaves the cat bin, the installation bracket can move downward under the pressure of the cat bin to jointly squeeze the pressure sensor with the lower cover to realize the monitoring of the weight change of the cat bin. By installing the pressure sensor at the bottom of the installation bracket and only abutting against the lower cover, during installation, only the pressure sensor needs to be installed on the installation bracket and then the installation bracket is installed on the lower cover. There is no rigid connection between the pressure sensor and the lower cover. During the transportation or handling of the cat litter box, even if due to the tilting of the cat litter box or other reasons, one of the installation bracket or the lower cover is impacted in the horizontal or vertical direction, causing the two to move in the separation direction, the pressure sensor will move together with the installation bracket. The installation bracket and the lower cover will not simultaneously pull the pressure sensor in two directions to cause irreversible damage to the pressure sensor, protecting the pressure sensor and prolonging the service life of the pressure sensor. The pre-deformation of the pressure sensor is only controlled by the weight of the installation bracket and the cat bin, and the degree of pre-deformation is controllable, enabling the pressure sensor to accurately measure the weight change of the cat bin, avoiding locking the pressure sensor with both the installation bracket and the lower cover, and thus avoiding the uncontrollable degree of pre-deformation of the pressure sensor caused by the processing errors of the installation bracket and the lower cover.

[0006] In the above-mentioned cat litter box, a horizontally extending mounting plate is provided on the lower cover. Jacks are provided on the mounting plate, and guide posts vertically inserted into the jacks are provided at the bottom of the mounting bracket. A limiting member is installed at the bottom of the guide post, and the limiting member is located below the mounting plate to prevent the guide post from disengaging from the jack. The guide post vertically passes through the mounting plate from top to bottom through the jack and extends below the mounting plate to guide the vertical movement of the mounting bracket, so that during the movement of the mounting bracket, the pressure sensor is always aligned with the mounting plate, ensuring stable extrusion of the mounting bracket and the lower cover on the pressure sensor, and thus ensuring the measurement accuracy of the pressure sensor. A limiting member is installed at the bottom of the guide post. The limiting member can abut against the bottom of the mounting plate to prevent the guide post from disengaging from the jack, realizing a stable connection between the mounting bracket and the lower cover, and avoiding the disconnection between the mounting bracket and the lower cover when transporting or the user carrying the cat litter box.

[0007] In the above-mentioned cat litter box, the inner diameter of the jack is larger than the outer diameter of the guide post to form a clearance between the inner side wall of the jack and the outer side wall of the guide post. The clearance provides a certain space for the horizontal movement of the guide post. When one of the mounting bracket or the lower cover is subjected to a horizontal impact force, the guide post can move horizontally relative to the lower cover with the mounting bracket by a certain distance to buffer the horizontal impact force received, avoiding breakage of the guide post due to excessive impact force. At the same time, since the pressure sensor is only installed on the mounting bracket, the horizontal impact force received can be prevented from being transmitted to the pressure sensor to protect the pressure sensor and prevent damage to the pressure sensor.

[0008] In the above-mentioned cat litter box, the limiting member includes a connecting portion detachably connected to the guide post and a limiting portion with an outer diameter larger than the inner diameter of the jack. There is an installation clearance between the top surface of the limiting portion and the bottom surface of the mounting plate. The installation clearance enables the limiting portion not to abut against the bottom of the mounting plate, avoiding the formation of an additional extrusion force on the pressure sensor due to the abutment of the limiting portion and the mounting plate, and further avoiding excessive pre-deformation of the pressure sensor caused by over-tight installation between the mounting bracket and the lower cover. At the same time, the installation clearance also provides a certain space for the vertical movement of the guide post. When the cat litter box is tilted and the mounting bracket moves in the direction of disengaging from the lower cover, the guide post can move a certain distance away from the lower cover with the mounting bracket to buffer the vertical impact force received, avoiding breakage and damage of the guide post or the limiting member due to excessive vertical impact force.

[0009] In the above-mentioned cat litter box, the lower cover includes a bottom plate and a hollow support tube provided on the bottom plate. The mounting plate is provided on the inner wall of the support tube so that the upper part of the support tube surrounds the outer peripheral side of the pressure sensor. When the pressure sensor abuts against the mounting plate, the entire pressure sensor is also located inside the support tube, and the upper part of the support tube surrounds the outer peripheral side of the pressure sensor to protect the pressure sensor from being damaged by collision and extend the service life of the pressure sensor.

[0010] In the above-mentioned cat litter box, reinforcing ribs are provided at the bottom of the mounting plate, and the reinforcing ribs are connected to the inner wall of the support tube. To enhance the strength of the mounting plate and prevent the mounting plate from bending or breaking when the pressure sensor presses against the mounting plate along with the mounting bracket.

[0011] In the above-mentioned cat litter box, a plurality of pressure sensors are provided at the bottom of the mounting bracket, and the plurality of pressure sensors are respectively arranged on the outer edge of the bottom of the mounting bracket. By distributing the plurality of pressure sensors at positions close to the outer edge of the bottom of the mounting bracket, the plurality of pressure sensors detect multiple positions of the mounting bracket at the same time, making the monitoring of the weight change of the cat litter box more accurate.

[0012] In the above-mentioned cat litter box, the pressure sensor includes a strain gauge and an elastic matrix connected to each other. The strain gauge is arranged around the elastic matrix, the strain gauge is fixed to the bottom of the mounting bracket, and the elastic matrix abuts against the lower cover. When a cat enters the cat litter box, the mounting bracket moves downward, driving the strain gauge to move downward. Because the bottom of the elastic matrix abuts against the lower cover, the elastic matrix deforms to realize the detection of pressure, and the detection is accurate and reliable.

[0013] In the above-mentioned cat litter box, the mounting bracket includes a frame body, and also includes a mounting tube and a screw post provided at the bottom of the frame body. A locking screw is installed at the bottom of the screw post, and the head of the locking screw and the bottom of the mounting tube jointly clamp the strain gauge. When the strain gauge moves downward along with the mounting bracket, the mounting tube can reserve space for the elastic matrix that can displace relative to the strain gauge, preventing the mounting bracket from affecting the detection of the pressure sensor and ensuring the accuracy of the monitoring data of the weight change of the cat litter box. The setting of the locking screw makes the fixation between the strain gauge and the mounting bracket more stable and reliable.

[0014] In the above-mentioned cat litter box, a positioning protrusion is provided at the bottom of the mounting bracket, and a positioning notch is provided on one side of the strain gauge. The positioning protrusion and the positioning notch cooperate to install and position the pressure sensor. The positioning notch can quickly install and position the pressure sensor during installation. During installation, aligning and cooperating the positioning notch with the positioning protrusion can complete the installation and positioning, reducing the assembly difficulty and improving the assembly efficiency.

[0015] The features and advantages of the present utility model will be disclosed in detail in the following specific embodiments and drawings. Description of the Drawings

[0016] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0017] Figure 1 It is a three-dimensional view of a cat litter box of the present utility model;

[0018] Figure 2 It is a three-dimensional view of a pressure sensor;

[0019] Figure 3 It is an assembly schematic diagram of a mounting bracket and a pressure sensor;

[0020] Figure 4 It is a partial sectional view of a cat litter box of the present utility model Figure 1 ;

[0021] Figure 5 It is a partial sectional view of a cat litter box of the present utility model Figure 2 ;

[0022] Figure 6 It is a three-dimensional view of the lower cover.

[0023] Reference numerals:

[0024] 100, cat bin;

[0025] 200, base;

[0026] 300, mounting bracket; 310, frame body; 320, mounting tube; 330, screw post; 340, locking screw; 350, guide post; 360, limiting member; 361, connecting portion; 362, limiting portion; 370, mounting gap; 380, positioning protrusion;

[0027] 400, lower cover; 410, bottom plate; 420, support tube; 430, mounting plate; 431, jack; 432, moving gap; 433, reinforcing rib;

[0028] 500, pressure sensor; 510, strain gauge; 511, positioning notch; 520, elastic matrix. Specific embodiments

[0029] A cat litter box proposed by the present utility model includes a base and a cat chamber disposed above the base. The base includes a lower cover and a mounting bracket connected to the bottom of the cat chamber. The mounting bracket is movably connected to the top of the lower cover. A pressure sensor for monitoring the weight change of the cat chamber is provided between the mounting bracket and the lower cover. The pressure sensor is fixed to the bottom of the mounting bracket and abuts against the lower cover. By providing a pressure sensor between the movably connected mounting bracket and the lower cover, when a cat enters or exits the cat chamber, the mounting bracket can move downward under the pressure of the cat chamber to jointly squeeze the pressure sensor with the lower cover, so as to realize the monitoring of the weight change of the cat chamber. By installing the pressure sensor at the bottom of the mounting bracket and only abutting against the lower cover, during installation, only the pressure sensor needs to be installed on the mounting bracket and then the mounting bracket is installed on the lower cover. There is no rigid connection between the pressure sensor and the lower cover. During the transportation or handling of the cat litter box, even if due to the dumping of the cat litter box or other reasons, one of the mounting bracket or the lower cover is subjected to an impact force in the horizontal or vertical direction, causing the two to move in the separating direction, the pressure sensor will move together with the mounting bracket. The mounting bracket and the lower cover will not pull the pressure sensor in two directions at the same time, causing irreversible damage to the pressure sensor, protecting the pressure sensor and prolonging the service life of the pressure sensor. The pre-deformation of the pressure sensor is only controlled by the weight of the mounting bracket and the cat chamber, and the degree of pre-deformation is controllable, so that the pressure sensor can accurately measure the weight change of the cat chamber, avoiding the pressure sensor being locked with both the mounting bracket and the lower cover at the same time, and further avoiding the uncontrollable degree of pre-deformation of the pressure sensor caused by the processing errors of the mounting bracket and the lower cover.

[0030] The technical solutions of the embodiments of the present utility model will be explained and described below with reference to the accompanying drawings of the embodiments of the present utility model. However, the following embodiments are only the preferred embodiments of the present utility model and not all of them. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative efforts all belong to the protection scope of the present utility model.

[0031] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more, unless otherwise clearly defined.

[0033] In the present utility model, unless otherwise clearly specified and defined, the terms such as "installed", "connected", "joined", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0035] Embodiment 1:

[0036] A cat litter box, as Figures 1 to 6As shown in the figure, it includes a base 200 and a cat bin 100. The cat bin 100 is arranged above the base 200. The base 200 includes a mounting bracket 300 and a lower cover 400. The mounting bracket 300 is movably connected to the top of the lower cover 400. The mounting bracket 300 is connected to the bottom of the cat bin 100. A pressure sensor 500 is arranged between the mounting bracket 300 and the lower cover 400. The pressure sensor 500 is fixed to the bottom of the mounting bracket 300 and abuts against the lower cover 400. When the cat does not enter the cat bin 100, the pressure sensor 500 can only detect the weight of the cat bin 100 and the mounting bracket 300. When the cat enters the cat bin 100, under the gravity of the cat, the cat bin 100 and the mounting bracket 300 move downward together towards the lower cover 400, so that the mounting bracket 300 and the lower cover 400 jointly squeeze the pressure sensor 500 located between them. At this time, the pressure sensor 500 can detect the weight of the cat bin 100, the mounting bracket 300 and the cat. When the cat leaves the cat bin 100, the cat bin 100 and the mounting bracket 300 no longer squeeze the pressure sensor 500 downward under the weight of the cat. The weight detected by the pressure sensor 500 returns to the weight of the cat bin 100 and the mounting bracket 300 again, so as to realize the monitoring of the weight change of the cat bin 100.

[0037] In the utility model, by arranging the pressure sensor 500 between the movably connected mounting bracket 300 and the lower cover 400, when the cat enters and exits the cat bin 100, the mounting bracket 300 can move downward under the pressure of the cat bin 100 to jointly squeeze the pressure sensor 500 with the lower cover 400, so as to realize the monitoring of the weight change of the cat bin 100. By installing the pressure sensor 500 at the bottom of the mounting bracket 300 and only abutting against the lower cover 400, during installation, only the pressure sensor 500 needs to be fixed on the mounting bracket 300, and then the mounting bracket 300 is installed on the lower cover 400. There is no rigid connection between the pressure sensor 500 and the lower cover 400. During the transportation or handling of the litter box, even if due to the litter box tipping over or other reasons, one of the mounting bracket 300 or the lower cover 400 is impacted in the horizontal or vertical direction, causing the two to move in the separating direction, the pressure sensor 500 will also move together with the mounting bracket 300. The mounting bracket 300 and the lower cover 400 will not pull the pressure sensor 500 in two directions at the same time, causing irreversible damage to the pressure sensor 500, protecting the pressure sensor 500 and extending the service life of the pressure sensor 500. Since the pre-deformation of the pressure sensor 500 is only controlled by the weight of the mounting bracket 300 and the cat bin 100, the degree of pre-deformation is controllable, so that the pressure sensor 500 can accurately measure the weight change of the cat bin 100, avoiding the pressure sensor 500 being locked with both the mounting bracket 300 and the lower cover 400 at the same time, and further avoiding the uncontrollable degree of pre-deformation of the pressure sensor 500 caused by the processing errors of the mounting bracket 300 and the lower cover 400.

[0038] As Figure 6 shown, a horizontally extending mounting plate 430 is provided on the lower cover 400. A jack 431 vertically penetrating the mounting plate 430 is provided on the mounting plate 430. A guide post 350 is provided at the bottom of the mounting bracket 300. The guide post 350 vertically passes through the mounting plate 430 from top to bottom through the jack 431 and extends below the mounting plate 430 to guide the vertical movement of the mounting bracket 300, so that during the movement of the mounting bracket 300, the pressure sensor 500 is always aligned with the mounting plate 430, ensuring a stable extrusion of the mounting bracket 300 and the lower cover 400 on the pressure sensor 500, and further ensuring the measurement accuracy of the pressure sensor 500. A limiting member 360 is installed at the bottom of the guide post 350. The limiting member 360 is located below the mounting plate 430. The limiting member 360 can abut against the bottom of the mounting plate 430 to prevent the guide post 350 from disengaging from the jack 431, realizing a stable connection between the mounting bracket 300 and the lower cover 400, and avoiding the disconnection of the mounting bracket 300 and the lower cover 400 when transporting or the user carrying the cat litter box.

[0039] The limiting member 360 in this embodiment includes a connecting portion 361 and a limiting portion 362. The connecting portion 361 is detachably connected to the guide post 350. The limiting portion 362 is located below the mounting plate 430, and the outer diameter of the limiting portion 362 is larger than the inner diameter of the jack 431. An installation gap 370 is provided between the top surface of the limiting portion 362 and the bottom surface of the mounting plate 430, that is, the limiting portion 362 does not abut against the bottom of the mounting plate 430, avoiding an additional extrusion force on the pressure sensor 500 due to the abutment of the limiting portion 362 and the mounting plate 430, and further avoiding excessive pre-deformation of the pressure sensor 500 caused by over-tight installation between the mounting bracket 300 and the lower cover 400. The installation gap 370 also provides a certain space for the vertical movement of the guide post 350. When the cat litter box is tilted and the mounting bracket 300 moves in the direction of disengaging from the lower cover 400, the guide post 350 can move a certain distance away from the lower cover 400 along with the mounting bracket 300 to buffer the received vertical impact force, avoiding breakage and damage of the guide post 350 or the limiting member 360 caused by excessive vertical impact force. Preferably, the connecting portion 361 and the guide post 350 are connected by threads, so as to adjust the size of the installation gap 370 by rotating the connecting portion 361, and further compensate for the processing error.

[0040] As Figure 5As shown, in this embodiment, the inner diameter of the jack 431 is greater than the outer diameter of the guide post 350, so that an active gap 432 is formed between the outer side wall of the guide post 350 inserted into the jack 431 and the inner side wall of the jack 431. The active gap 432 provides a certain space for the horizontal movement of the guide post 350. When one of the mounting bracket 300 or the lower cover 400 is subjected to a horizontal impact force, the guide post 350 can move horizontally relative to the lower cover 400 with the mounting bracket 300 by a certain distance to buffer the horizontal impact force received, avoiding the guide post 350 from breaking due to excessive impact force. At the same time, since the pressure sensor 500 is only mounted on the mounting bracket 300, the horizontal impact force received can be prevented from being transmitted to the pressure sensor 500 to protect the pressure sensor 500 and prevent the pressure sensor 500 from being damaged.

[0041] The lower cover 400 in this embodiment includes a bottom plate 410 and a support tube 420. The support tube 420 is vertically arranged on the bottom plate 410. The support tube 420 is hollow. The mounting plate 430 is arranged inside the support tube 420. The outer peripheral side of the mounting plate 430 is connected to the inner wall of the support tube 420, so that when the pressure sensor 500 abuts against the mounting plate 430, the whole pressure sensor 500 is also located inside the support tube 420. The upper part of the support tube 420 surrounds the outer peripheral side of the pressure sensor 500 to protect the pressure sensor 500 from being damaged by collision and extend the service life of the pressure sensor 500. In this embodiment, a reinforcing rib 433 is arranged at the bottom of the mounting plate 430. The reinforcing rib 433 is connected to the inner wall of the support tube 420 to enhance the strength of the mounting plate 430 and avoid the mounting plate 430 from being bent or broken when the pressure sensor 500 presses against the mounting plate 430 with the mounting bracket 300.

[0042] In this embodiment, there are multiple support tubes 420. The bottom of the mounting bracket 300 is provided with pressure sensors 500 having the same number as the support tubes 420. The multiple pressure sensors 500 are respectively arranged at positions near the outer edge of the bottom of the mounting bracket 300 and are arranged in one-to-one correspondence with the mounting plates 430 on the respective support tubes 420. By distributing the multiple pressure sensors 500 at positions near the outer edge of the bottom of the mounting bracket 300, the multiple pressure sensors 500 simultaneously detect multiple positions of the mounting bracket 300, making the monitoring of the weight change of the cat bin 100 more accurate.

[0043] As Figure 2 shown, the pressure sensor 500 includes a strain gauge 510 and an elastic matrix 520. The strain gauge 510 is arranged around the elastic matrix 520 and is connected to the elastic matrix 520. As Figure 4As shown, the strain gauge 510 is fixed to the bottom of the mounting bracket 300, and the elastic matrix 520 abuts against the mounting plate 430. When a cat enters the cat bin 100, the mounting bracket 300 moves downward, driving the strain gauge 510 to move downward. Since the bottom of the elastic matrix 520 abuts against the mounting plate 430 of the lower cover 400, the elastic matrix 520 deforms to detect the pressure. In this embodiment, the mounting bracket 300 includes a frame body 310, a plurality of mounting tubes 320 and a plurality of screw posts 330. The mounting tubes 320 and the screw posts 330 are provided at the bottom of the frame body 310. The mounting tubes 320 and the screw posts 330 are arranged adjacent to each other, and a plurality of (two or more) screw posts are arranged around the circumference of one mounting tube 320. The strain gauge 510 is provided below the mounting tube 320, and the top of the strain gauge 510 abuts against the bottom of the mounting tube 320. A locking screw 340 is installed at the bottom of the screw post 330. The locking screw 340 includes a screw rod threadedly connected to the screw post 330 and a head provided at the bottom end of the screw rod. The screw rod is located on the outer peripheral side of the strain gauge 510, and the head abuts against the bottom of the strain gauge 510, so that the head of the locking screw 340 and the bottom of the mounting tube 320 jointly clamp the strain gauge 510. When the strain gauge 510 moves downward with the mounting bracket 300, the mounting tube 320 can reserve space for the elastic matrix 520 that moves upward relative to the strain gauge 510, avoiding the influence of the mounting bracket 300 on the detection of the pressure sensor 500, ensuring the accuracy of the monitoring data of the weight change of the cat bin 100. The setting of the locking screw 340 makes the fixation between the strain gauge 510 and the mounting bracket 300 more stable and reliable.

[0044] In order to quickly install and position the pressure sensor 500 during installation, a positioning protrusion 380 is further provided at the bottom of the frame body 310 in this embodiment, and a positioning notch 511 is provided on one side of the strain gauge 510. During installation, aligning the positioning notch 511 with the positioning protrusion 380 and mating them can complete the installation positioning, reducing the assembly difficulty and improving the assembly efficiency.

[0045] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. Any technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. A cat litter box, comprising a base and a cat bin disposed above the base, wherein the base includes a lower cover and a mounting bracket connected to the bottom of the cat bin, and is characterized in that: The mounting bracket is movably connected to the top of the lower cover. A pressure sensor for monitoring the weight change of the cat bin is arranged between the mounting bracket and the lower cover. The pressure sensor is fixed to the bottom of the mounting bracket and abuts against the lower cover.

2. The litter box according to claim 1, characterized in that: The lower cover is provided with a horizontally extending mounting plate. The mounting plate is provided with a jack. The bottom of the mounting bracket is provided with a guide post vertically inserted into the jack. A limiting member is installed at the bottom of the guide post. The limiting member is located below the mounting plate to prevent the guide post from being disengaged from the jack.

3. The litter box according to claim 2, characterized in that: The inner diameter of the jack is larger than the outer diameter of the guide post to form a movable gap between the inner side wall of the jack and the outer side wall of the guide post.

4. A litter box according to claim 2 or 3, characterized in that: The limiting member includes a connecting portion detachably connected to the guide post and a limiting portion with an outer diameter larger than the inner diameter of the jack. An installation gap is provided between the top surface of the limiting portion and the bottom surface of the mounting plate.

5. The litter box according to claim 2, wherein: The lower cover includes a bottom plate and a hollow support tube arranged on the bottom plate. The mounting plate is arranged on the inner wall of the support tube so that the upper part of the support tube surrounds the outer peripheral side of the pressure sensor.

6. The litter box according to claim 5, characterized in that: Reinforcing ribs are arranged at the bottom of the mounting plate, and the reinforcing ribs are connected to the inner wall of the support tube.

7. The litter box according to claim 1, characterized in that: A plurality of pressure sensors are arranged at the bottom of the mounting bracket, and the plurality of pressure sensors are respectively arranged on the outer edge of the bottom of the mounting bracket.

8. The litter box according to claim 1, characterized in that: The pressure sensor includes a strain gauge and an elastic matrix connected to each other. The strain gauge surrounds the elastic matrix. The strain gauge is fixed to the bottom of the mounting bracket, and the elastic matrix abuts against the lower cover.

9. The litter box according to claim 8, characterized in that: The mounting bracket includes a frame body, and further includes a mounting tube and a screw post arranged at the bottom of the frame body. A locking screw is installed at the bottom of the screw post, and the head of the locking screw and the bottom of the mounting tube jointly clamp the strain gauge.

10. A litter box according to claim 8, wherein: A positioning protrusion is arranged at the bottom of the mounting bracket, and a positioning notch is arranged on one side of the strain gauge. The positioning protrusion and the positioning notch cooperate to perform installation positioning on the pressure sensor.

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