Pet toilet system

Abstract

To suppress bad odor filling in a room by excreta.SOLUTION: A system toilet 1 for pet includes: an excretion container 2 for housing toilet sand and having a liquid-permeable bottom surface part 21; a tray 5 which is placed in a lower part of the excretion container 2 and houses an absorption sheet absorbing liquid transmitting the bottom surface part 21; a lower container 3 holding the tray 5; and an upper container 4 which is placed above the excretion container 2, is provided with a front wall part 41 forming an opening 40 through which a pet enters / exits, a pair of side wall parts 43, 44 extending in a back and forth direction provided so that they face each other on both sides in a width direction of the opening 40, and a rear wall part 42 facing the opening 40 in the back and forth direction. In an area above the bottom surface part 21 of the excretion container 2 in the upper container 4, an opening area 421 including a plurality of openings 421x is formed.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] One aspect of the present invention relates to a pet system toilet.

Background Art

[0002] As a pet system toilet, it is known to include an excretion container that houses toilet sand for covering or solidifying feces, a tray that is disposed below the excretion container and houses an absorption sheet that absorbs urine passing through the toilet sand, a lower container that holds the tray, and an upper container that is disposed above the excretion container (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Here, in a state where the toilet sand is wet with urine or the feces are wet, the room may be filled with a bad odor. In order to dry the urine and feces, it is conceivable to improve the air permeability inside the toilet. However, for example, simply making holes in the toilet may cause liquids and powders such as urine to scatter outside the toilet, and instead, the room may become smelly.

[0005] One aspect of the present invention has been made in view of the above circumstances, and relates to a pet system toilet that can suppress the room from being filled with a bad odor due to excrement.

Means for Solving the Problems

[0006] A pet toilet system according to one aspect of the present invention comprises: an excretion container that contains toilet litter and has a liquid-permeable bottom; a tray positioned below the excretion container and containing an absorbent sheet that absorbs liquid that has permeated the bottom; a lower container that holds the tray; and an upper container positioned above the excretion container and having a front wall portion formed with an entrance / exit for the pet to enter and exit; a pair of side walls extending in the front-rear direction and facing each other on both sides in the width direction of the entrance / exit; and a rear wall portion facing the entrance / exit in the front-rear direction. In the upper container, an opening region including one or more openings is formed in the area above the bottom of the excretion container.

[0007] In one aspect of the present invention, a pet toilet system is provided in the upper container, in an area above the bottom surface of the waste container, with one or more openings forming in the upper container. This configuration improves ventilation above the bottom surface where the feces and urine are held. This makes it easier to dry the feces and urine held at the bottom surface, suppressing the generation of unpleasant odors inside the toilet compared to when the litter is wet with urine or the feces are damp. Furthermore, because the opening is formed in an area above the bottom surface of the upper container, liquids such as urine that have permeated through the bottom surface and flowed downwards, as well as fragments and powders of cat litter with cat or feces attached, are less likely to scatter outside the toilet through the opening. This helps to prevent the area outside the toilet from becoming smelly. As described above, the pet toilet system according to one aspect of the present invention can prevent unpleasant odors from filling the room due to excrement.

[0008] A slit-shaped opening may be formed in the opening region. Such a slit-shaped opening allows air to pass through, but makes it difficult for liquids or powders to pass through, thus more effectively preventing liquids such as urine or powders from splashing out of the toilet through the opening.

[0009] The width of the opening may be longer than the height. By making the width of the opening sufficiently long, ventilation can be improved over a wide area in the width direction on the bottom surface, allowing air to move efficiently. This can further suppress the generation of unpleasant odors inside the litter box. In addition, it is conceivable that the aforementioned liquids and powders may be scattered in the height direction (up and down) when pets dig in the litter box. In this regard, by making the height shorter than the width, it is possible to suppress the leakage of liquids and powders from the opening to the outside of the litter box due to the pets digging in the litter box.

[0010] The opening may have a vertical length that is longer than its width. By making the vertical length of the opening sufficiently long, ventilation can be improved over a wide area in the vertical direction, allowing for efficient air movement. For example, urine odor is lighter than air and tends to accumulate in the upper part of the space, while fecal odor is heavier than air and tends to accumulate in the lower part of the space. In this respect, improving ventilation over a wide area in the vertical direction allows for the efficient excretion of various unpleasant odors as described above. This can further suppress the generation of unpleasant odors inside the toilet.

[0011] Multiple openings may be formed in the opening area at predetermined intervals in the vertical direction. This improves ventilation over a wide area in the vertical direction above the bottom surface, allowing for efficient air movement. As a result, the generation of unpleasant odors inside the toilet can be further suppressed.

[0012] In the wall portion of the upper container where an opening is formed, the opening may comprise 5% or more of the total area of ​​the wall portion. This ensures sufficient ventilation by providing a adequate opening area, while also effectively preventing liquids, powders, etc., from splashing outside the toilet due to an excessively large opening area.

[0013] The vertical length of the opening may be longer than the vertical length of the waste container. By ensuring sufficient vertical length in the opening, ventilation is improved over a wide area in the vertical direction above the bottom surface, allowing for efficient air movement. This further suppresses the generation of unpleasant odors inside the toilet.

[0014] The vertical length of one opening formed in the opening area may be shorter than the vertical length of the waste container. In this way, by ensuring that the waste container has sufficient depth and that the vertical length of the opening is not excessively long, it is possible to effectively prevent liquids, powders, etc. from splashing out of the opening onto the outside of the toilet.

[0015] The width of the opening may be longer than the width of the bottom surface. This improves ventilation over a wide area in the width direction on the bottom surface, allowing for efficient air movement. This further suppresses the generation of unpleasant odors inside the toilet.

[0016] The width of the opening may be shorter than the width of the bottom surface. In such a configuration, the probability of liquid or powder reaching the opening, that is, the probability of liquid or powder leaking from the opening, can be reduced.

[0017] The bottom section has multiple bottom openings that allow liquid to pass through, and the sum of the opening areas of the multiple openings may be greater than the sum of the opening areas of the multiple bottom openings. In this configuration, the airflow resistance of the openings is lower than that of the bottom openings, so the airflow rate through the openings is greater than the airflow rate through which air flows from the main body to the bottom section. This makes it easier to expel the air inside the toilet to the outside, allowing the feces and urine to dry effectively and further suppressing the generation of unpleasant odors inside the toilet. In addition, when changing feces or litter, sand dust is scattered, but in this configuration, the sand dust does not accumulate on top of the sand, but is expelled from the main body, so the air inside the main body is efficiently cleaned.

[0018] The bottom section has multiple bottom openings that allow liquid to pass through, and the sum of the opening areas of the multiple openings may be smaller than the sum of the opening areas of the multiple bottom openings. In such a configuration, the flow rate of air flowing from outside the toilet towards the bottom of the toilet is greater than the flow rate of air discharged outside the toilet. As a result, the air inside the toilet moves to the lower part of the toilet through the bottom openings, making it difficult for unpleasant odors inside the toilet to spread to the outside.

[0019] The opening area may also be formed in the rear wall. This allows the opening area to be formed near the back of the toilet, which is far from the entrance and tends to have poor ventilation, thereby effectively improving ventilation inside the toilet.

[0020] The position of the center line of the opening area in the width direction and the position of the center line of the bottom surface in the width direction do not necessarily coincide. Pets sometimes prefer to defecate without the entrance / exit in front of them to reduce stress. Such pets will defecate at a position offset from the center line in the width direction of the toilet. In this regard, by offsetting the position of the center line of the opening area from the center line of the toilet (bottom surface), the opening area can be positioned to match the defecation position of pets that defecate at an offset position, and the opening area can be positioned in a position where the feces and urine can dry easily. This can further suppress the generation of unpleasant odors inside the toilet.

[0021] The bottom surface portion has a plurality of bottom surface openings which are rectangular opening portions permeable to liquid, and the length of the opening portion in the vertical direction may be longer than the length of the short side of the bottom surface opening. With such a configuration, the ventilation resistance of the opening portion becomes lower than that of the bottom surface opening, so the flow rate of air flowing through the opening portion is larger than the flow rate of air flowing from the main body to the bottom surface portion. As a result, it becomes easier to discharge the air inside the toilet to the outside, the urine can be effectively dried, and the generation of malodor inside the toilet can be further suppressed. Also, although sand powder scatters when changing the feces or replacing the sand, in this configuration, the sand powder is not accumulated on top of the sand, but is discharged outside the main body, so the air inside the main body becomes efficiently clean.

[0022] The bottom surface portion has a plurality of bottom surface openings which are rectangular opening portions permeable to liquid, and the length of the opening portion in the vertical direction may be shorter than the length of the long side of the bottom surface opening. With such a configuration, the flow rate of air flowing from the outside of the toilet toward the lower part of the toilet is larger than the flow rate of air discharged to the outside of the toilet. As a result, the air inside the toilet moves to the lower layer part of the toilet through the bottom surface opening, so it is possible to configure the toilet so that the malodor inside the toilet is difficult to spread to the outside of the toilet.

[0023] The upper container may be provided on a wall portion where an opening region is formed, and may have an outer extension portion extending outward from the wall portion. By providing the outer extension portion, it is possible to receive urine or the like dripping outward along the slit-shaped opening portion, and it is possible to appropriately suppress urine or the like from splashing outside the toilet.

[0024] The outer extension portion may be provided below the lower end of the opening region. According to such a configuration, urine or the like dripping downward from the opening portion can be appropriately received by the outer extension portion, and it is possible to more appropriately suppress urine or the like from splashing outside the toilet.

[0025] The outer extension portion may be provided above the upper end of the bottom surface portion. As a result, urine or the like received by the outer extension portion can be made to flow to the bottom surface portion, and it is possible to appropriately prevent the urine from becoming urinary stones and the urine from emitting an odor.

[0026] The upper container further has an engaging portion that extends downward from the lower end of the outer extending portion and engages with the bottom surface portion, and the length of the outer extending portion extending outward may be shorter than the length of the engaging portion in the vertical direction. By ensuring that the extending length of the outer extending portion does not become too long, the strength of the outer extending portion can be ensured, and it is possible to suppress the accumulation of urine in the outer extending portion and the emission of a bad smell.

[0027] The outer extending portion may be inclined upward toward its outer end portion. By being inclined upward toward the outside, it is possible to form a configuration in which urine or the like is less likely to spill outside from the outer extending portion.

[0028] One or more guide grooves may be formed in the outer extending portion along the extending direction. Thereby, urine or the like can be appropriately guided inside the toilet, and it is possible to appropriately suppress urine or the like from splashing outside the toilet.

[0029] <{i} The upper container may be provided on a wall portion where an opening region is formed, and may further have an inner extending portion that extends inward from the wall portion. Thereby, urine or the like that has reached the opening region can be flowed toward the bottom surface portion inside the toilet, and it is possible to appropriately suppress urine or the like from splashing outside the toilet.

[0030] The pet toilet system further includes an externally attached member provided outside the opening region so as to face the opening region, and a plurality of cover openings, which are openings, may be formed at predetermined intervals in the vertical direction on the surface of the externally attached member facing the opening region. In this way, by providing the externally attached member outside the opening region, it is more effectively suppressed that urine or the like splashes outside. Further, since a plurality of cover openings are formed in the externally attached member at predetermined intervals in the vertical direction, it is possible to avoid deterioration of air permeability due to the provision of the externally attached member and suppress the generation of a bad smell inside the toilet.

[0031] The external attachment member has a cover wall surface provided below the cover opening so as to be continuous with the cover opening in the vertical direction, and a non-ventilated cover portion extending upward from the upper end of the cover wall surface so as to cover a part of the cover opening. The non-ventilated cover portion may have a first cover portion that extends upward while inclined outward, and a second cover portion that is continuous with the upper end of the first cover portion and extends upward so as to have a smaller outward inclination angle than the first cover portion. Because the non-ventilated cover portion extends upward so as to cover a part of the cover opening, airflow is more easily generated from the bottom to the top of the cover opening, improving ventilation between the inside and outside of the toilet through the cover opening. In addition, because the non-ventilated cover portion extends upward while inclined outward, the area of ​​the cover opening formed between it and the cover wall surface can be increased compared to the case where the non-ventilated cover portion extends on the same plane as the cover wall surface without inclining outward. This further improves ventilation. Furthermore, by reducing the inclination angle (outward inclination angle) of the second cover portion, and by having the second cover portion extend upward at a near-vertical angle, it is possible to effectively suppress urine and other fluids from splashing outwards.

[0032] The upper container has an upper container wall surface provided below the opening so as to be continuous with the opening in the vertical direction, and an upper container non-ventilated section extending upward from the upper end of the upper container wall surface so as to cover a part of the opening. The upper container non-ventilated section may have a first section that extends upward while inclined outward, and a second section that is continuous with the upper end of the first section and extends upward so as to have a smaller outward inclination angle than the first section. Because the upper container non-ventilated section extends upward so as to cover a part of the opening, airflow is more easily generated from the bottom to the top of the opening, improving ventilation between the inside and outside of the toilet through the opening. In addition, because the upper container non-ventilated section extends upward while inclined outward, the area of ​​the opening formed between it and the upper container wall surface can be increased compared to the case where the upper container non-ventilated section extends on the same plane as the upper container wall surface without inclining outward. This further improves ventilation. Furthermore, by reducing the inclination angle of the second part (the angle of inclination outward) and having the second part extend upward at a near-vertical angle, it is possible to effectively suppress urine and other fluids from splashing outward.

[0033] The upper container may have an upper container wall surface provided below the opening so as to be continuous with the opening in the vertical direction, and an upper container non-ventilated portion extending upward from the upper end of the upper container wall surface so as to cover a portion of the opening. Because the upper container non-ventilated portion extends upward so as to cover a portion of the opening, airflow is more easily generated from the bottom to the top of the opening, which can improve ventilation between the inside and outside of the toilet through the opening.

[0034] The non-ventilated portion of the upper container may have a first portion that extends upward while inclined outward. By having the non-ventilated portion of the upper container extend upward while inclined outward, the area of ​​the opening formed between it and the upper container wall can be increased compared to the case where the non-ventilated portion of the upper container extends on the same plane as the upper container wall without inclining outward. This can further improve ventilation.

[0035] The non-ventilated portion of the upper container may further have a second portion that is continuous with the upper end of the first portion and extends upward at a smaller outward angle than the first portion. By reducing the inclination angle (outward inclination angle) of the second portion and having the second portion extend upward at a near-vertical angle, it is possible to effectively suppress the splashing of urine, etc., outwards.

[0036] The wall portion in which the opening is formed may extend upward while sloping inward. With this configuration, when a pet urinates in the wall portion with the opening, the angled wall portion makes it easier for the urine to flow down to the bottom of the toilet. This suppresses the accumulation of urine in the opening and helps to suppress the generation of unpleasant odors inside the toilet.

[0037] Two adjacent openings in the vertical direction may have the upper opening positioned inward from the lower opening. With this configuration, when a pet urinates on the wall with the opening, the angled wall allows the urine to easily flow down to the bottom of the toilet. This suppresses the accumulation of urine in the opening and reduces the generation of unpleasant odors inside the toilet. [Effects of the Invention]

[0038] According to one aspect of the present invention, it is possible to suppress the filling of a room with unpleasant odors caused by excrement. [Brief explanation of the drawing]

[0039] [Figure 1] Figure 1 is a perspective view of a pet toilet system according to this embodiment. [Figure 2] Figure 2 shows a top view (a), a side view (b), and a rear view (c) of the upper container shown in Figure 1. [Figure 3] Figure 3 shows a plan view (a), a side view (b), and a rear view (c) of the upper container with the external components attached. [Figure 4] Figure 4 shows a cross-sectional view (a) of the upper container with the external attachment attached, a partially enlarged view of the cross-sectional view (b), and a partially enlarged view of the cross-sectional view (c). [Figure 5] Figure 5 shows a cross-sectional view (a) and a partially enlarged view (b) of the upper container to which the external additive member relating to the modified example is attached. [Figure 6] Figure 6 is a cross-sectional view of the upper container according to a modified example. [Figure 7] Figure 7 is a cross-sectional view of the upper container according to a modified example. [Figure 8] Figure 8 is a cross-sectional view of the upper container according to a modified example. [Figure 9] Figure 9 is a plan view of the upper container according to a modified example. [Figure 10] Figure 10 is a cross-sectional view of the upper container according to a modified example. [Figure 11] Figure 11 is a cross-sectional view of the upper container according to a modified example. [Modes for carrying out the invention]

[0040] Hereinafter, a pet toilet system according to an embodiment of the present invention will be described in detail with reference to the drawings. In each figure, the same or corresponding parts are denoted by the same reference numerals, and redundant explanations are omitted. Note that the drawings are schematic, and the proportions of dimensions, etc., may differ from those of actual objects.

[0041] Figure 1 is a perspective view of the pet toilet system 1 according to this embodiment. The pet toilet system 1 according to this embodiment is, for example, a system toilet for the excretion of a pet cat. The pet toilet system 1 according to this embodiment may be a system toilet for the excretion of pets other than cats.

[0042] As shown in Figure 1, the pet toilet system 1 comprises a waste container 2, a lower container 3, an upper container 4, and a tray 5. The pet toilet system 1 employs a so-called half-type upper container 4, in which the top of the upper container 4 is open.

[0043] In the following, the vertical direction of the pet toilet system 1 may be described as the "vertical direction," the length direction (depth direction) as the "front-to-back direction," and the direction perpendicular to the vertical and front-to-back directions as the "width direction." In the "vertical direction," the direction toward the upper container 4 as seen from the lower container 3 is described as "up," and the direction toward the lower container 3 as seen from the upper container 4 is described as "down." In the "front-to-back direction," the direction toward the opening 40 as seen from the rear wall 42 of the upper container 4 is described as "front," and the direction toward the rear wall 42 as seen from the opening 40 is described as "rear."

[0044] The excretion container 2 is a container for holding toilet litter (not shown). The excretion container 2 has a liquid-permeable bottom surface 21 and walls 22. The toilet litter is a granular material that can absorb or permeate liquids such as urine. For example, the toilet litter may be made from bentonite that can cover feces and absorb liquid, wood or paper with a water-repellent coating, or zeolite, silica gel, or minerals with deodorizing properties, molded into a roughly spherical shape with a diameter of several millimeters to several centimeters, and known materials may be used. However, if clumping litter is used as toilet litter, the liquid-permeable bottom surface 21 may become clogged, so it is preferable that clumping litter is not used in this pet toilet system 1. The toilet litter is placed in the bottom surface 21.

[0045] The bottom portion 21 is a plate-like member with slats formed in a slatted pattern, and a plurality of regular bottom openings 21a between the slats. The bottom openings 21a are rectangular openings through which liquid can pass. The bottom portion 21 is formed in a roughly rectangular shape when viewed from above. The wall portion 22 is a part formed to rise upward from the periphery of the bottom portion 21. That is, the wall portion 22 is formed to rise upward from both ends in the front-rear direction and both ends in the width direction of the bottom portion 21. Note that the bottom portion 21 may have a shape other than a rectangle when viewed from above, as long as it can contain the litter. The excrement excreted by the pet passes through the litter and through the gaps in the bottom portion 21 formed by the slatted pattern, and falls into the lower container 3 (more specifically, the tray 5 held in the lower container 3) located below the excretion container 2. The excretion container 2 is made of a resin such as plastic, but is not limited to this.

[0046] Tray 5 is positioned below the waste container 2 and contains an absorbent sheet (not shown) that absorbs liquid (waste) that permeates the bottom surface 21. Tray 5 has a tray handle portion 51 formed on the front side that the user can grasp and pull out. The tray handle portion 51 may also be formed on the rear side of tray 5. In this case, tray 5 is symmetrical front to back. In this way, because tray 5 is symmetrical front to back and has tray handle portions 51 formed on both the front and rear sides, it is possible to pull out tray 5 via the tray handle portion 51 even if the front and back of tray 5 are reversed. The area of ​​the absorbent sheet that absorbs liquid is fixed to some extent, but by reversing the front and back of tray 5, it is possible to change the orientation of the absorbent sheet and absorb liquid in an area different from the area that has already absorbed liquid. In this way, by reversing the front and back of tray 5, one absorbent sheet can be used to its maximum potential. Tray 5 is formed to be slightly smaller than the lower container 3 so that it can be housed inside the lower container 3 and swingable. In this embodiment, tray 5 is pulled out horizontally, but is not limited to this, and may be pulled out diagonally upward, for example.

[0047] The lower container 3 is a container that holds the tray 5. The lower container 3 houses the tray 5 so that it can be swingably pulled out from inside the lower container 3. The lower container 3 is composed of a bottom surface 31 and wall surfaces 32, 33, 34, and 35. The bottom surface 31 is the part that faces the installation surface on which the pet system toilet 1 is installed. The bottom surface 31 is formed in a rectangular shape in plan view. The central part of the bottom surface 31 may be an opening.

[0048] Wall surface 32 is a portion formed to rise upward from the front end of the bottom surface 31. An opening is formed in wall surface 32 for pulling out the tray 5. Wall surface 33 is a portion formed to rise upward from the rear end of the bottom surface 31. Wall surfaces 34 and 35 are portions formed to rise upward from both ends in the width direction of the bottom surface 31. Wall surfaces 32, 33, 34, and 35 are formed continuously, and the entire circumference of the bottom surface 31 is surrounded by wall surfaces 32, 33, 34, and 35. The wall surface 22 of the waste container 2 is fitted onto the upper ends of wall surfaces 32, 33, 34, and 35. The upper container 4 is attached so as to cover the upper ends of wall surfaces 32, 33, 34, and 35. A connecting portion 300 is provided at the center and upper end of wall surfaces 34 and 35 in the front-to-back direction, which connects to a hook 47 of the upper container 4.

[0049] The upper container 4 is positioned above the excretion container 2 and has an opening 40 for the pet to enter and exit. As described above, the upper container 4 is a so-called half-type upper container with its top open. Alternatively, instead of a so-called half-type upper container, a so-called full-cover type upper container that covers the upper ends of the wall surfaces 32, 33, 34, 35 (without openings above the wall surfaces 32, 33, 34, 35) may be used. In this case, the upper container may have, for example, a fixed hood that covers the upper ends of the wall surfaces 32, 33, 34, 35 and a movable hood that can rotate (or slide) relative to the fixed hood. The detailed configuration of the half-type upper container 4 will be described below with reference to Figures 2 to 4. Figure 2 is a plan view (a), a side view (b), and a rear view (c) of the upper container 4 shown in Figure 1. Figure 3 is a plan view (a), a side view (b), and a rear view (c) of the upper container 4 with the external attachment member 80 attached. Figure 4 shows a cross-sectional view (a), a partially enlarged view (b), and a partially enlarged view (c) of the upper container 4 to which the external attachment member 80 is attached.

[0050] As shown in Figures 1 and 2(a), the upper container 4 is composed of a front wall portion 41, a rear wall portion 42, and a pair of side wall portions 43 and 44. In this embodiment, the front wall portion 41, the rear wall portion 42, and the pair of side wall portions 43 and 44 are integrally formed. Furthermore, the upper container 4 does not have a bottom surface and is penetrating in the vertical direction.

[0051] The front wall portion 41 is located in front of and below the opening 40 (entrance / exit area) through which pets enter and exit. The front wall portion 41 is attached to the upper end of the wall surface 32 of the lower container 3 and extends vertically along the wall surface 32 as well as in the width direction.

[0052] The pair of side wall sections 43 and 44 are provided so as to face each other on both sides in the width direction of the opening 40 and are portions that extend in the front-rear direction. The front ends of the side wall sections 43 and 44 are continuous with both ends in the width direction of the front wall section 41. The side wall sections 43 and 44 are formed as curved surfaces that protrude outward in the width direction downward from their upper ends. The side wall sections 43 and 44 are attached to the upper ends of the wall surfaces 34 and 35 of the lower container 3. As shown in Figure 1, a hook 47 extending downward is provided at approximately the center in the front-rear direction of the lower end portion of the side wall sections 43 and 44. That is, the upper container 4 further has a hook 47 provided at the lower end of the side wall sections 43 and 44 and connected to the connecting portion 300 of the lower container 3. The upper container 4 is attached and fixed to the lower container 3 by the connection of the hook 47 to the connecting portion 300.

[0053] The rear wall portion 42 is the part that faces the opening 40 in the front-rear direction, as shown in Figure 1, and is the part that extends in the width direction at the rear end of the upper container 4. The rear wall portion 42 is continuous with the rear ends of the side wall portions 43 and 44 at both ends in the width direction. The rear wall portion 42 is formed as a curved surface that protrudes rearward downward from its upper end. The rear wall portion 42 is attached to the upper end of the wall surface 33 of the lower container 3.

[0054] As shown in Figure 1, an opening region 421 containing multiple openings 421x is formed in the upper container 4 above the bottom surface 21 of the waste container 2. The rear wall portion 42, which is the wall portion on which the opening region 421 is formed, may extend upward while inclining inward. In this embodiment, the opening region 421 is formed in the rear wall portion 42. The opening region 421 formed in the rear wall portion 42 will be described with reference to Figure 2(c).

[0055] As shown in Figure 2(c), the opening region 421 has multiple slit-shaped openings 421x that extend in the width direction of the rear wall portion 42. The width of each opening 421x is longer than its height. Multiple openings 421x are formed in the opening region 421 at predetermined intervals in the vertical direction. That is, in the opening region 421, openings 421x and upper container wall surfaces 421y without openings are alternately formed in the vertical direction. Two adjacent openings 421x in the vertical direction have the upper opening 421x located further inside the toilet than the lower opening 421x. In the rear wall portion 42, the opening region 421 (the region including the openings 421x) may comprise approximately 20-60% of the total area of ​​the rear wall portion 432, for example, approximately 40-45%. The vertical length of the opening region 421 may be longer than the vertical length of the excretion container 2. Furthermore, in the rear wall portion 42, approximately 3 to 20% of the entire area of ​​the rear wall portion 432, for example, approximately 7 to 15% (5% or more as an example), may be the area of ​​multiple openings 421x.

[0056] The vertical length of one opening 421x is shorter than the vertical length of the excretion container 2. Also, the widthwise length of the opening 421x may be longer than the widthwise length of the bottom surface 21 (see Figure 1) of the excretion container 2. Alternatively, the widthwise length of the opening 421x may be shorter than the widthwise length of the bottom surface 21 (see Figure 1) of the excretion container 2. Also, the vertical length of the opening 421x may be longer than the length of the shorter side of the bottom opening 21a of the bottom surface 21. Alternatively, the vertical length of the opening 421x may be shorter than the length of the longer side of the bottom opening 21a. Also, the sum of the opening areas of multiple openings 421x may be greater than the sum of the opening areas of multiple bottom openings 21a. Alternatively, the sum of the opening areas of multiple openings 421x may be less than the sum of the opening areas of multiple bottom openings 21a.

[0057] As shown in Figure 2(c), mounting recesses 421a, 421a, 421b, and 421b for attaching the external attachment members 80, which will be described later, are formed at approximately the four corners of the opening region 421. The mounting recesses 421a, 421a are formed at the upper end and both ends in the width direction of the opening region 421. The mounting recesses 421b, 421b are formed at the lower end and both ends in the width direction of the opening region 421.

[0058] As shown in Figures 2(a) and 2(b), the upper container 4 is provided on the rear wall portion 42, which is the wall portion in which the opening region 421 is formed, and further has an outer extension portion 422 extending outward from the rear wall portion 42. The outer extension portion 422 is configured to receive urine and the like that dripping out of the toilet through the opening 421x and return it to the inside of the toilet. The outer extension portion 422 is provided below the lower end of the opening region 421. Alternatively, the outer extension portion 422 may be provided above the upper end of the bottom portion 21 (see Figure 1).

[0059] The outer extension portion 422 is inclined upward toward its outer end. This makes it easier for urine and other liquids received by the outer extension portion 422 to flow (be returned) toward the inside of the toilet. The upper container 4 has an engaging portion 425 (see Figure 2(b)) that extends downward from the lower end of the outer extension portion 422. For example, the outward extension length of the outer extension portion 422 is shorter than the vertical length of the engaging portion 425.

[0060] As shown in Figures 3(a) to 3(c), an external attachment member 80 is attached to the upper container 4 according to this embodiment. The external attachment member 80 is provided on the outside of the opening region 421 so as to face the opening region 421. The external attachment member 80 is attached to the outside of the opening region 421 by partially inserting it into the mounting recesses 421a, 421a, 421b, 421b at the four corners of the opening region 421 (see Figure 2(c)). Multiple openings, which are cover openings 802, are formed on the surface of the external attachment member 80 facing the opening region 421 at predetermined intervals in the vertical direction. The positional relationship between the opening region 421 and the external attachment member 80 will be explained with reference to Figure 4.

[0061] Figure 4(a) is a cross-sectional view of the upper container 4 to which the external attachment member 80 is attached. Figure 4(b) is a partially enlarged view of Figure 4(a) (partially enlarged view of the opening region 421 and the external attachment member 80). As shown in Figure 4(b), in the opening region 421, openings 421x and upper container wall surfaces 421y without openings are alternately formed in the vertical direction. Also, as shown in Figure 4(b), in the external attachment member 80, cover openings 802 and cover wall surfaces 801 without openings are alternately formed in the vertical direction. The cover wall surface 801 is a wall surface provided below the cover opening 802 so as to be continuous with the cover opening 802 in the vertical direction.

[0062] The external attachment member 80 further has a non-ventilated cover portion 803 that extends upward from the upper end of the cover wall surface 801 to cover a portion of the cover opening 802. The non-ventilated cover portion 803 has a first cover portion 803a and a second cover portion 803b. The first cover portion 803a is a portion that extends upward while inclined outward (outward from the toilet). The second cover portion 803b is a portion that extends upward such that the angle of inclination outward is smaller than that of the first cover portion 803a (for example, vertically). In the configuration according to this embodiment, the second cover portion 803b extends upward substantially parallel to the upper container wall surface 421y. The cover opening 802 is mostly covered by the second cover portion 803b, etc., in the vertical direction, with only a small portion corresponding to the area from the upper end of the second cover portion 803b to the lower end of the cover wall surface 801 above the second cover portion 803b not being covered by the second cover portion 803b, etc. The extension length of the first cover portion 803a may be, for example, about the same as the extension length of the cover wall surface 801. The extension length of the second cover portion 803b may be, for example, sufficiently longer than the extension lengths of the cover wall surface 801 and the first cover portion 803a. The cover wall surface 801 and the first cover portion 803a are located on the extension line of the opening 421x of the upper container 4 (on the extension line in the front-rear direction).

[0063] The positional relationship and length of the cover wall surface 801, the cover opening 802, and the cover non-ventilated portion 803 in the external attachment member 80 are not limited to those described above. For example, as shown in Figure 4(c), the length of the cover wall surface 801 may be longer than the configuration shown in Figure 4(b), and the length of the second cover portion 803b may be shorter than the configuration shown in Figure 4(b). In other words, the connection point (folding portion) between the cover wall surface 801 and the first cover portion 803a may be provided higher than the configuration shown in Figure 4(b). When comparing the configuration in Figure 4(b) and the configuration in Figure 4(c), the configuration in Figure 4(b), in which the connection point (folding portion) between the cover wall surface 801 and the first cover portion 803a is provided relatively lower, can more effectively suppress urine from rushing up and splashing out of the toilet.

[0064] Next, the effects and benefits of the pet toilet system 1 according to this embodiment will be described.

[0065] The pet toilet system 1 according to this embodiment comprises: an excretion container 2 that contains toilet litter and has a liquid-permeable bottom portion 21; a tray 5 positioned below the excretion container 2 and containing an absorbent sheet that absorbs liquid that has permeated the bottom portion 21; a lower container 3 that holds the tray 5; and an upper container 4 positioned above the excretion container 2 and having a front wall portion 41 with an opening 40 for the pet to enter and exit; a pair of side walls 43, 44 that extend in the front-rear direction and are provided on both sides in the width direction of the opening 40 so as to face each other; and a rear wall portion 42 that faces the opening 40 in the front-rear direction. In the upper container 4, an opening region 421 including a plurality of openings 421x is formed in the area above the bottom portion 21 of the excretion container 2.

[0066] In the pet toilet system 1 according to this embodiment, an opening region 421 including a plurality of openings 421x is formed in the upper container 4 in the area above the bottom surface 21 of the excretion container 2. With this configuration, ventilation is improved above the bottom surface 21 where feces and urine are held. This makes it easier to dry the feces and urine held in the bottom surface 21, and the generation of foul odors inside the toilet can be suppressed compared to when the toilet litter is wet with urine or when the feces are damp. In addition, because the openings 421x are formed in the area above the bottom surface 21 of the upper container 4, liquids such as urine that have permeated through the bottom surface 21 and flowed downwards, or pieces and powders of cat litter with cats and feces attached, are less likely to scatter outside the toilet from the openings 421x. This can suppress the outside of the toilet from becoming smelly. As described above, the pet toilet system 1 according to this embodiment can suppress the filling of a room with foul odors due to excrement.

[0067] Furthermore, the formation of the opening area 421 allows light to easily enter the inside of the toilet (making the inside of the toilet brighter), making it easier to notice dirt inside the toilet, and allowing pets to defecate with peace of mind.

[0068] A slit-shaped opening 421x may be formed in the opening region 421. Such a slit-shaped opening 421x allows air to pass through, but makes it difficult for liquids or powders to pass through, thus more effectively preventing liquids such as urine or powders from splashing out of the opening 421x to the outside of the toilet.

[0069] The width of the opening 421x may be longer than its height. By making the width of the opening 421x sufficiently long, ventilation can be improved over a wide area in the width direction on the bottom surface 21, allowing air to move efficiently. This can further suppress the generation of unpleasant odors inside the toilet. Furthermore, it is conceivable that the aforementioned liquids and powders may be scattered in the height direction (up and down) when the pet scratches the litter. In this regard, by making the height shorter than the width, it is possible to suppress the leakage of liquids and powders from the opening to the outside of the toilet due to the pet scratching the litter.

[0070] Multiple openings 421x may be formed in the opening region 421 at predetermined intervals in the vertical direction. This improves ventilation over a wide area in the vertical direction on the bottom surface 21, allowing for efficient air movement. This further suppresses the generation of unpleasant odors inside the toilet.

[0071] In the wall portion of the upper container 4 where the opening region 421 is formed, the area of ​​the opening 421x may be 5% or more of the total area of ​​the wall portion. This ensures sufficient space for the opening 421x to improve ventilation, while also appropriately preventing the opening 421x from becoming too large and causing liquids, powders, etc., to splash outside the toilet.

[0072] The vertical length of the opening area 421 may be longer than the vertical length of the waste container 2. By ensuring a sufficient vertical length of the opening area 421 in this way, ventilation is improved over a wide vertical area on the bottom surface 21, allowing for efficient air movement. This further suppresses the generation of unpleasant odors inside the toilet.

[0073] The vertical length of one opening 421x formed in the opening region 421 may be shorter than the vertical length of the waste container 2. In this way, by ensuring that the waste container 2 has sufficient depth and that the vertical length of the opening 421x is not excessively long, it is possible to appropriately suppress the splashing of liquids, powders, etc., from the opening 421x to the outside of the toilet.

[0074] The width of the opening 421x may be longer than the width of the bottom surface 21. This improves ventilation over a wide area in the width direction on the bottom surface 21, allowing for efficient air movement. This further suppresses the generation of unpleasant odors inside the toilet.

[0075] The widthwise length of the opening 421x may be shorter than the widthwise length of the bottom surface 21. In such a configuration, the probability of liquid or powder reaching the opening, that is, the probability of liquid or powder leaking from the opening 421x, can be reduced.

[0076] The bottom section 21 has multiple bottom openings 21a, which are openings through which liquid can pass. The sum of the opening areas of the multiple openings 421x may be greater than the sum of the opening areas of the multiple bottom openings 21a. In this configuration, the airflow resistance of the openings 421x is lower than that of the bottom openings 21a, so the airflow through the openings 421x is greater than the airflow from the main body to the bottom section 21. This makes it easier to expel the air inside the toilet to the outside, allowing the feces and urine to dry effectively and further suppressing the generation of unpleasant odors inside the toilet. In addition, when changing feces or litter, sand dust is scattered, but in this configuration, the sand dust does not accumulate on top of the sand, but is expelled from the main body, so the air inside the main body is efficiently cleaned.

[0077] The bottom portion 21 has multiple bottom openings 21a, which are openings through which liquid can pass, and the sum of the opening areas of the multiple openings 421x may be smaller than the sum of the opening areas of the multiple bottom openings 21a. In such a configuration, the flow rate of air flowing from outside the toilet towards the bottom of the toilet is greater than the flow rate of air discharged to the outside of the toilet. As a result, the air inside the toilet moves to the lower part of the toilet through the bottom openings 21a, making it difficult for unpleasant odors inside the toilet to spread to the outside.

[0078] The opening area 421 may also be formed in the rear wall portion 42. This allows the opening area 421 to be formed near the back of the toilet, which is far from the pet's entrance and exit and tends to have poor ventilation, thereby effectively improving ventilation inside the toilet.

[0079] The bottom section 21 has multiple bottom openings 21a, which are rectangular openings through which liquid can pass, and the vertical length of the openings 421x may be longer than the length of the shorter side of the bottom openings 21a. In this configuration, the airflow resistance of the openings 421x is lower than that of the bottom openings 21a, so the airflow through the openings 421x is greater than the airflow through the bottom section 21 from the main body. This makes it easier to expel the air inside the toilet to the outside, allowing the feces and urine to dry effectively and further suppressing the generation of unpleasant odors inside the toilet. In addition, when changing feces or litter, sand dust is scattered, but in this configuration, the sand dust does not accumulate on top of the sand, but is expelled from the main body, so the air inside the main body is efficiently cleaned.

[0080] The bottom portion 21 has multiple bottom openings 21a, which are rectangular openings through which liquid can pass, and the vertical length of the openings 421x may be shorter than the length of the longer side of the bottom openings 21a. In this configuration, the flow rate of air flowing from outside the toilet towards the bottom of the toilet is greater than the flow rate of air discharged to the outside of the toilet. As a result, the air inside the toilet moves to the lower part of the toilet through the bottom openings, making it difficult for unpleasant odors inside the toilet to spread to the outside.

[0081] The upper container 4 is provided on a wall portion in which an opening region 421 is formed, and may have an outward extension portion 422 extending outward from the wall portion. By providing the outward extension portion 422, urine and other liquids that drip outward through the slit-shaped opening 421x can be received, and splashing of urine and other liquids outside the toilet can be appropriately suppressed.

[0082] The outward extension portion 422 may be provided below the lower end of the opening region 421. With this configuration, urine and other liquids dripping downward from the opening 421x can be appropriately received by the outward extension portion 422, and splashing of urine and other liquids outside the toilet can be more effectively suppressed.

[0083] The outer extension portion 422 may be provided above the upper end of the bottom portion 21. This allows the urine and other substances received by the outer extension portion 422 to flow to the bottom portion 21, effectively preventing the urine from forming urinary stones and emitting a foul odor.

[0084] The upper container 4 further has an engaging portion 425 that extends downward from the lower end of the outer extension portion 422 and engages with the bottom portion 21, and the outward extension length of the outer extension portion 422 may be shorter than the vertical length of the engaging portion 425. By preventing the extension length of the outer extension portion 422 from becoming too long, the strength of the outer extension portion 422 can be ensured, and it is possible to suppress the accumulation of urine in the outer extension portion 422 that causes a foul odor.

[0085] The outer extension portion 422 may be inclined upward toward its outer end. By inclining upward toward the outside, it is possible to create a configuration that makes it difficult for urine or other liquids to spill outwards from the outer extension portion 422.

[0086] The above-described pet toilet system 1 further includes an external attachment member 80 provided outside the opening region 421 so as to face the opening region 421, and a plurality of cover openings 802 may be formed at predetermined intervals in the vertical direction on the surface of the external attachment member 80 facing the opening region 421. By providing the external attachment member 80 outside the opening region 421 in this way, splashing of urine and other substances to the outside is more effectively suppressed. In addition, since a plurality of cover openings 802 are formed at predetermined intervals in the vertical direction on the external attachment member 80, poor ventilation caused by the provision of the external attachment member 80 can be avoided, and the generation of unpleasant odors inside the toilet can be suppressed.

[0087] The external attachment member 80 has a cover wall surface 801 provided below the cover opening 802 so as to be continuous with the cover opening 802 in the vertical direction, and a cover non-ventilated portion 803 extending upward from the upper end of the cover wall surface 801 so as to cover a part of the cover opening 802. The cover non-ventilated portion 803 may have a first cover portion 803a that extends upward while inclined outward, and a second cover portion 803b that is continuous with the upper end of the first cover portion 803a and extends upward so as to have a smaller outward inclination angle than the first cover portion 803a. Because the cover non-ventilated portion 803 extends upward so as to cover a part of the cover opening 802, airflow is more easily generated from the lower to the upper part of the cover opening 802, thereby improving ventilation between the inside and outside of the toilet via the cover opening 802. Furthermore, because the non-ventilated portion 803 of the cover extends upward while inclined outward, the area of ​​the cover opening 802 formed between it and the cover wall 801 can be increased compared to the case where the non-ventilated portion 803 extends on the same plane as the cover wall 801 without inclining outward. This further improves ventilation. In addition, by reducing the inclination angle (outward inclination angle) of the second cover portion 803b, and having the second cover portion 803b extend upward at a near-vertical angle, splashing of urine and other liquids outward can be effectively suppressed.

[0088] The rear wall portion 42, which is the wall portion in which the opening region 421 is formed, may extend upward while inclining inward. With this configuration, when a pet urinates into the rear wall portion 42 having the opening region 421, the angled rear wall portion 42 makes it easier for the urine to flow down to the bottom of the toilet. This suppresses the retention of urine in the opening region 421 and can suppress the generation of unpleasant odors inside the toilet.

[0089] Two adjacent openings 421x in the vertical direction may have the upper opening 421x positioned further inside the toilet than the lower opening 421x. With this configuration, when a pet urinates into the rear wall 42 having the opening area 421, the angled rear wall 42 allows the urine to easily flow down to the bottom of the toilet. This suppresses the retention of urine in the opening area 421 and reduces the generation of unpleasant odors inside the toilet.

[0090] Although this embodiment has been described above, the present invention is not limited to the above embodiment.

[0091] Figure 5 shows a cross-sectional view (a) and a partially enlarged view (b) of the upper container 4A with an external attachment member according to a modified example attached. The upper container 4A shown in Figure 5 has a configuration that is generally the same as the upper container 4 described in the embodiment, but the configuration of the opening region and the configuration of the external attachment member are slightly different.

[0092] As shown in Figure 5(b), the upper container 4A has an upper container wall surface 401 provided below the opening 402 so as to be continuous with the opening 402 in the vertical direction, and an upper container non-ventilated portion 403 extending upward from the upper end of the upper container wall surface 401 so as to cover a part of the opening 402. The upper container non-ventilated portion 403 has a first portion 403a that extends upward while inclined outward, and a second portion 403b that is continuous with the upper end of the first portion 403a and extends upward so as to have a smaller outward inclination angle than the first portion. In the external attachment member provided outside the opening region, an opening 821x and an external attachment member wall surface 821y without an opening are alternately formed in the vertical direction. Thus, in the upper container 4A, the configuration of the opening region and the external attachment member is the opposite of that of the upper container 4. In this configuration, where the non-ventilated upper container section 403 extends upward to cover a portion of the opening 402, airflow is more easily generated from the bottom to the top of the opening 402, improving ventilation between the inside and outside of the toilet through the opening 402. Furthermore, because the non-ventilated upper container section 403 extends upward while inclined outward, the area of ​​the opening 402 formed between it and the upper container wall surface 401 can be increased compared to the case where the non-ventilated upper container section 403 extends on the same plane as the upper container wall surface 401 without inclining outward. This further improves ventilation. In addition, by reducing the inclination angle (outward inclination angle) of the second section 403b, and having the second section 403b extend upward at a near-vertical angle, splashing of urine and other liquids outward can be effectively suppressed.

[0093] Furthermore, the external additive is not an essential component, and it is not necessary for the external additive to be attached to the upper container 4A as described above.

[0094] Figures 6 to 11 are cross-sectional views of the upper container according to the modified example.

[0095] As shown in Figure 6, the upper container is provided on a wall portion (in this case, the rear wall portion) where an opening region is formed, and may further have an inner extension portion 450 extending inward from the wall portion. The inner extension portion 450 may have a first extension portion 451 that is continuous with the outer extension portion 422 and extends inward, and a second extension portion 452 that extends downward from the tip of the first extension portion 451. With such a configuration, urine and the like that that have reached the opening region can be directed towards the bottom surface inside the toilet, and splashing of urine and the like outside the toilet can be appropriately suppressed.

[0096] Furthermore, as shown in Figure 7, the upper container may have a concave drainage groove 460 located outside the outer end of the outward extension portion 422. With this configuration, urine and other splashes that extend beyond the outward extension portion 422 can be caught in the drainage groove 460, thereby more effectively preventing urine and other splashes from spilling outside the toilet.

[0097] Furthermore, as shown in Figure 8, the upper container may have a plurality of second extensions 471 that function as urine drains, in addition to the outward extension 422. In this case, each second extension 471 may be configured to extend outward from the wall, similar to the outward extension 422, and may be provided at different heights.

[0098] Furthermore, as shown in Figure 9, the outward extension portion 422 may have a plurality of guide grooves 481 formed along the extension direction. This allows urine and other fluids to be properly guided into the toilet and effectively prevents them from splashing outside the toilet.

[0099] Furthermore, as shown in Figure 10, the upper container may have an outer extension 522 instead of the outer extension 422. The outer extension 522 has a configuration that is generally the same as the outer extension 422, but it has a rear end portion 522a that extends upward at its outer end. By providing such a rear end portion 522a, the outer extension 522 can more effectively suppress urine and other liquids from splashing outside the toilet.

[0100] Furthermore, as shown in Figure 11, the upper container may also have side walls 622 provided at both ends in the width direction of the opening area. By providing such side walls 622, it is possible to more effectively suppress urine and other fluids from splashing outside the toilet.

[0101] Furthermore, the vertical length of the opening in the opening area may be longer than the horizontal length. By making the vertical length of the opening sufficiently long, ventilation can be improved over a wide area in the vertical direction, allowing air to move efficiently. For example, urine odor is lighter than air and tends to accumulate in the upper part of the space, while fecal odor is heavier than air and tends to accumulate in the lower part of the space. In this respect, improving ventilation over a wide area in the vertical direction allows for the efficient excretion of various unpleasant odors as described above. This can further suppress the generation of unpleasant odors inside the toilet.

[0102] Furthermore, the position of the center line of the opening area in the width direction and the position of the center line of the bottom surface 21 in the width direction do not have to coincide. That is, the opening area may be formed at a position offset from the center of the rear wall 42, or it may be formed in a wall other than the rear wall 42. Pets sometimes prefer to defecate without the entrance in front of them to reduce stress. Such pets defecate at a position offset from the center line in the width direction of the toilet. In this respect, by offsetting the position of the center line of the opening area from the center line of the toilet (bottom surface), the opening area can be positioned to match the defecation position of pets that defecate at a position offset from the center line, and the opening area can be positioned in a position where the feces and urine can easily dry. This can further suppress the generation of unpleasant odors inside the toilet. [Explanation of Symbols]

[0103] 1...Pet ​​system toilet, 2...Excretion container, 3...Lower container, 4,4A...Upper container, 5...Tray, 21...Bottom surface, 21a...Bottom opening, 40...Opening (entry / exit section), 41...Front wall, 42...Rear wall, 43,44...Side wall, 80...External attachment member, 401...Upper container wall, 403...Upper container non-ventilated section, 403a...First section, 403b...Second section, 421...Opening area, 421x...Opening, 421y...Upper container wall, 422...Outer extension, 425...Engaging section, 450...Inner extension, 481...Guide groove, 801...Cover wall, 803...Cover non-ventilated section, 803a...First cover section, 803b...Second cover section.

Claims

1. A waste container that contains cat litter and has a liquid-permeable bottom, A tray is placed below the waste container and contains an absorbent sheet that absorbs the liquid that has permeated the bottom surface, A lower container that holds the tray, An upper container is provided, which is positioned above the aforementioned excretion container and has a front wall portion formed with an entrance / exit section for the pet to enter and exit, a pair of side wall portions extending in the front-rear direction and facing each other on both sides in the width direction of the entrance / exit section, and a rear wall portion facing the entrance / exit section in the front-rear direction. In the upper container, an opening region including one or more openings is formed in the area above the bottom surface of the waste container. A pet toilet system in which 3 to 20% of the entire area of ​​the rear wall portion is the area of ​​one or more openings.

2. The pet toilet system according to claim 1, wherein a slit-shaped opening is formed in the opening region.

3. The pet toilet system according to claim 2, wherein the length of the opening in the width direction is longer than the length in the vertical direction.

4. The pet toilet system according to claim 2, wherein the length of the opening in the vertical direction is longer than the length in the width direction.

5. The pet toilet system according to claim 2, wherein a plurality of the openings are formed in the opening region at predetermined intervals in the vertical direction.

6. The pet toilet system according to claim 2, wherein in the wall portion of the upper container in which the opening region is formed, 5% or more of the total area of ​​the wall portion is the area of ​​the opening.

7. The pet toilet system according to claim 2, wherein the vertical length of the opening region is longer than the vertical length of the waste container.

8. The pet toilet system according to claim 2, wherein the vertical length of one of the openings formed in the opening region is shorter than the vertical length of the waste container.

9. The pet toilet system according to claim 2, wherein the length of the opening in the width direction is longer than the length of the bottom surface in the width direction.

10. The pet toilet system according to claim 2, wherein the length of the opening in the width direction is shorter than the length of the bottom surface in the width direction.

11. The bottom portion has a plurality of bottom openings, which are openings through which liquid permeates. The pet toilet system according to claim 2, wherein the sum of the opening areas of the multiple openings is greater than the sum of the opening areas of the multiple bottom openings.

12. The bottom portion has a plurality of bottom openings, which are openings through which liquid permeates. The pet toilet system according to claim 2, wherein the sum of the opening areas of the multiple openings is smaller than the sum of the opening areas of the multiple bottom openings.

13. The opening region is formed in the rear wall portion, as described in claim 1 for a pet toilet system.

14. The pet toilet system according to claim 2, wherein the position of the center line of the opening region in the width direction and the position of the center line of the bottom surface in the width direction do not coincide with each other.

15. The bottom portion has a plurality of bottom openings, which are rectangular openings through which liquid can pass. The pet toilet system according to claim 2, wherein the vertical length of the opening is longer than the length of the shorter side of the bottom opening.

16. The bottom portion has a plurality of bottom openings, which are rectangular openings through which liquid can pass. The pet toilet system according to claim 2, wherein the vertical length of the opening is shorter than the length of the long side of the bottom opening.

17. The pet toilet system according to claim 2, wherein the upper container is provided on the wall portion where the opening region is formed and has an outward extension portion extending outward from the wall portion.

18. The pet toilet system according to claim 17, wherein the outward extension is provided below the lower end of the opening region.

19. The pet toilet system according to claim 18, wherein the outward extension is provided above the upper end of the bottom surface.

20. The upper container further has an engaging portion that extends downward from the lower end of the outward extension and engages with the bottom surface, The pet toilet system according to claim 17, wherein the outward extension length of the outward extension portion is shorter than the vertical length of the engagement portion.

21. The pet toilet system according to claim 17, wherein the outward extension is inclined upward toward its outer end portion.

22. The pet toilet system according to claim 17, wherein one or more guide grooves are formed in the outward extension portion along the extension direction.

23. The pet toilet system according to claim 17, wherein the upper container is provided on the wall portion in which the opening region is formed, and further has an inner extension portion extending inward from the wall portion.

24. The system further includes an external attachment member provided on the outside of the opening region so as to be opposite to the opening region, The pet toilet system according to claim 2, wherein a plurality of cover openings, which are openings, are formed at predetermined intervals in the vertical direction on the surface of the external attachment member facing the opening region.

25. The external attachment member has a cover wall surface provided below the cover opening so as to be continuous with the cover opening in the vertical direction, and a non-ventilated cover portion extending upward from the upper end of the cover wall surface so as to cover a part of the cover opening. The non-ventilated portion of the cover comprises a first cover portion that extends upward while inclined outward, and a second cover portion that is continuous with the upper end of the first cover portion and extends upward such that the angle of inclination outward is smaller than that of the first cover portion, according to claim 24.

26. The upper container has an upper container wall surface provided below the opening so as to be continuous with the opening in the vertical direction, and an upper container non-ventilated portion extending upward from the upper end of the upper container wall surface so as to cover a part of the opening. The non-ventilated upper container portion comprises a first portion extending upward while inclined outward, and a second portion that is continuous with the upper end of the first portion and extends upward such that the angle of inclination outward is smaller than that of the first portion, according to claim 24.

27. The pet toilet system according to claim 2, wherein the upper container has an upper container wall surface provided below the opening so as to be continuous with the opening in the vertical direction, and an upper container non-ventilated portion extending upward from the upper end of the upper container wall surface so as to cover a part of the opening.

28. The pet toilet system according to claim 27, wherein the non-ventilated portion of the upper container has a first portion that extends upward while inclined outward.

29. The pet toilet system according to claim 28, wherein the non-ventilated upper container portion further has a second portion that is continuous with the upper end of the first portion and extends upward such that the angle of inclination outward is smaller than that of the first portion.

30. The pet toilet system according to claim 2, wherein the wall portion in which the opening region is formed extends upward while sloping inward.

31. The pet toilet system according to claim 5, wherein two adjacent openings in the vertical direction are such that the upper opening is located inward from the lower opening.

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