Abstract:
The present invention relates to a pet potty capable of disposing of excrement of a pet. More particularly, the present invention relates to a pet potty that is automatically turned on when a built-in sensor detects a pet approaching the potty within a predetermined distance to evacuate excrement. When the pet finishes evacuating excrement and leaves the potty, the excrement is automatically disposed of by rotating the floor members. The potty is designed to be operated only when the pet stayed on the potty over a predetermined period of time. Thus the potty effectively prevent the troubles and uncleanness caused by the excrement of pets.

Description:
TECHNICAL FIELD  
       [0001]     The present invention relates to a pet potty capable of disposing of excrement of a pet. The present invention is an improved invention claiming priority based on Korean Patent Application No. 2002-22137 entitled “Pet Potty” and filed with the Korean Intellectual Property Office in the name of the present applicant. More particularly, the present invention relates to a pet potty which may detect a pet that approaches the pet potty by means of a sensor installed in the potty. When the pet finishes evacuating excrement and leave the potty, the potty automatically determines whether the pet has discharged urine or feces and disposes of the excrement. Thus, the potty may prevent the troubles and uncleanness caused by the excrement of pets.  
       BACKGROUND ART  
       [0002]     Generally, a pet such as a dog kept in a house is housebroken through repeated training by its owner so that the pet evacuates excrement only in a bathroom or a rest room that may be easily cleaned with water or on a plastic tray or mat placed in a living room. However, such a method has a problem in that the owner should always follow the pet and dispose of excrement of the pet or watch whether the pet evacuates excrement in a proper place.  
         [0003]     Therefore, a variety of pet potties have been recently developed. Among them, a potable pet potty disclosed in Korean Utility Model Application No. 2001-38854 filed on Dec. 17, 2001, comprises an evacuating portion including a first space defined by a bottom wall and sidewalls vertically extending from the edges of the bottom wall so as to accommodate a pet therein, a lid including a second space defined by a bottom wall and sidewalls vertically extending from edges of the bottom wall and with toilet paper contained therein and being connected to the evacuating portion in a foldable manner so as to cover the evacuating portion, a releasable locking means for keeping a state where the lid covers the evacuating portion, and an open-state maintaining means for keeping a state where the lid is opened with respect to the evacuating portion.  
         [0004]     The pet potty constructed as above has no technical features other than that the pet potty is made in the form of a bag which can be carried along. The pet potty has a space for containing toilet paper therein and has an attractive appearance so that it may be carried during travel. Below, some problems of the prior art will be discussed.  
         [0005]     First, even though the prior pet potty has an improved appearance, it is still inefficient from a practical point of view. That is, when the pet enters the evacuating portion and evacuates excrement on toilet paper placed therein by the owner, the owner then has to dispose of the excrement by replacing the toilet paper or by washing out the evacuating portion. Therefore, it is very inconvenience for the owner to perform such a procedure whenever the pet evacuates excrement during travel or at home.  
         [0006]     Second, when the lid is not covered over the evacuating portion, the urine of feces discharged by a pet is exposed to the outside to release bad smell and cause unattractive visual effects.  
         [0007]     Third, since a pet enters the evacuating portion and evacuates excrement therein, legs or other portions of the body of the pet are apt to be stained with the excrement.  
         [0008]     As described above, the pet potty of the prior art has serious problems in actual use. Basically, the pet potty not only has a complicated structure but also has many disadvantages that hinder practical use of the item.  
       SUMMARY OF INVENTION  
       [0009]     The present invention was conceived to solve the aforementioned problems. An object of the present invention is to provide a pet potty which can conveniently and easily dispose of excrement of a pet and be used mainly in a home but conveniently carried along. Once the pet potty is placed at a predetermined location such as a living room, when the pet evacuates excrement on the potty, the excrement is then automatically received within the potty. Then the owner of the pet only has to wash the potty at a regular time interval, whereby the excrement of the pet can be easily and automatically disposed of.  
         [0010]     In order to achieve the object of the present invention, the present invention provides a pet potty, comprising a frame which has a plurality of coupling recesses formed at an inner periphery defining an open central portion of the frame, and a driving motor installed in the frame to be driven by electric power from a power source; a plurality of floor members each of which has coupling bars formed at both sides thereof to be pivotally coupled to the respective coupling recesses; a driving mechanism installed within a portion of at least one side of the frame so as to rotate the floor members by means of a manual operation or the driving motor; an excrement tray detachably installed below the frame and the floor members; and a sensor installed in the frame to detect a pet. If the sensor detects stay of the pet over the frame for a predetermined period of time, the driving motor runs to rotate the floor members. Preferably, the frame is formed with a plurality of vents through which ozone and negative ions are generated, and a dust collecting plate is installed at the inside of the vents. 
     
    
     BRIEF DESCRIPTION OF DRAWINGS  
       [0011]     The above and other objects and features of the present invention will become apparent from the following description of preferred embodiments given in conjunction with the accompanying drawings, in which:  
         [0012]      FIG. 1  is an exploded perspective view of a pet potty according to the present invention;  
         [0013]      FIG. 2  is an assembled perspective view of the pet potty according to the present invention;  
         [0014]      FIG. 3  is a perspective view of a pet potty according to another embodiment of the present invention;  
         [0015]      FIG. 4  is a sectional view showing an operating state of the pet potty according to the present invention;  
         [0016]      FIG. 5  is a perspective view of a pet potty according to a further embodiment of the present invention;  
         [0017]      FIG. 6  is a sectional view of a portion of the pet potty of  FIG. 5 ;  
         [0018]      FIG. 7  is a perspective view of a pet potty according to a still further embodiment of the present invention;  
         [0019]      FIG. 8  is a sectional view of a portion of the pet potty of  FIG. 7 ;  
         [0020]      FIG. 9  is a front view showing rotation of one of floor members of the pet potty according to the present invention;  
         [0021]      FIG. 10  is a perspective view of a pet potty according to a still further embodiment of the present invention;  
         [0022]      FIG. 11  is an exploded perspective view of the pet potty of  FIG. 10 ;  
         [0023]      FIG. 12  is a front view of the pet potty of  FIG. 10 ;  
         [0024]      FIG. 13  is a sectional view showing a state where the floor members are opened during the operation of the pet potty of  FIG. 10 ; and  
         [0025]      FIG. 14  is a sectional view showing a state where the floor members are closed during the operation of the pet potty of  FIG. 10 . 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0026]     Hereinafter, preferred embodiments of a pet potty of the present invention will be described in detail with reference to the accompanying drawings.  
       Embodiment 1  
       [0027]      FIG. 1  is an exploded perspective view of a pet potty according to one preferred embodiment of the present invention,  FIG. 2  is an assembled perspective view of the pet potty according to the present invention,  FIG. 4  is a sectional view showing an operating state of the pet potty according the present invention, and  FIG. 9  is a front view showing the rotation of one of the floor members in the pet potty according to the present invention.  
         [0028]     A frame, designated by reference numeral  1 , is formed with a rotary knob  10  at one side. As will be described below, the rotary knob  10  is used to manually rotate a plurality of floor members  2  covering the central opening of the frame  1 . Preferably, a couple of sensors  11  running on electric power are installed at two corners of the frame. The sensors are used to detect the existence of a pet on the frame. Within the scope of the present invention, any types of sensors which may detect a pet staying on the frame may be used. For instance, an infrared sensor, a ultrasonic sensor, an RF sensor, a weight sensor and any other types of sensors may be effectively used to detect a pet over the potty. Even though this embodiment uses two sensors installed at two corners of the frame, the number and location of the sensors may vary within the scope of the present invention according to the type of the sensor being used.  
         [0029]     Preferably, a melody speaker  12  is installed to the frame. The melody speaker  12  is used to notify the owner when a pet has left the potty after evacuation. Furthermore, a plurality of coupling recesses  13  are formed at opposite sides of an inner periphery of the frame  1 , and a motor  14  running on the electric power from the power supply is installed at one side of the interior of the frame.  
         [0030]     In the central opening of the frame  1  defined by the inner periphery of the frame, a plurality of floor members  2  are installed. Preferably, as shown in the figures, each floor member has a structure of a grate. Thus, when a pet discharges urine and feces on the floor member  1 , urine may pass through the floor member while feces remains on the floor member. A plurality of floor members cover entire area of the central opening in a fashion that a plurality of blind blades cover a window. From longitudinal ends of each floor member, a pair of coupling bars are extended. The coupling bars are coupled into the respective coupling recesses  13  formed in the frame. The structure of the floor member is generally identical to each other in the following embodiments unless mentioned otherwise.  
         [0031]     A gear  20  is integrally formed at the end of each coupling bar. A driving mechanism, designated by reference numeral  3 , is configured in such a manner that one of the gears  20  formed at the end of the coupling bar is engaged with the motor  14  such that the gear can be rotated by an angle preferably within a range of 90 to 360 degrees. The rotation angle of the floor member may be freely selected within the above range in view of the design consideration. Further, a gear  20  is engaged with a rotary gear  100  formed at an end of the rotary knob  10 . A plurality of idle gears  30  are alternately disposed between the adjacent gears  20  and engaged with the adjacent gears so that all the gears  30  can be rotated at a time by driving the motor  14  or turning the knob  10 . It is manifest to a person of ordinary skill in the art that the floor members may be rotated by using various driving mechanism such as rack and pinion, timing gear and belt, driving chain and the like.  
         [0032]     When power is supplied, the motor  14  runs to drive any one of the gears  20  engaged with the motor  14  and then to cause the floor members  2  to rotate by an angle within a range of 90 to 360 degrees since the idle gears  30  and the other gears  20  are sequentially engaged with one another. On the other hand, when the rotary knob  10  is manually rotated, the rotary gear  100  is first rotated and other gears  20  engaged with the rotary gear  100  are then rotated. Consequently, the sequentially engaged gears  20  and the idle gears  30  engaged therewith are also rotated, and thus, the floor member  2  can be rotated by a predetermined angle within a range of 90 to 360 degrees.  
         [0033]     A lid, designated by reference numeral  4 , is put on the top of the frame  1  and is formed with a grip  40  at the center thereof. The lid  4  is used to prevent a bad smell of excrement of the pet from being emitted to the outside and to present a beautiful external appearance.  
         [0034]     An excrement tray, designated by reference numeral  5 , is detachably mounted to the bottom of the frame  1  and the floor members  2 . Preferably, an absorbent pad or the like is laid onto a floor surface of the excrement tray  5  so that the excrement of the pet does not come into direct contact with the floor surface of the excrement tray  5 . Further, in a case where the absorbent pad is laid onto the floor surface, only the pad may be simply replaced with a new pad without handling the excrement tray  5  when a user intends to dispose of the excrement of the pet.  
         [0035]     An operation of the pet potty according to the preferred embodiment of the present invention constructed as above will be hereinafter described.  
         [0036]     First, if the electric power is supplied to the potty of the present invention, the sensors  11  installed at the frame  1  detect whether the pet approaches the potty to evacuate excrement. The sensors  11  also detects whether the pet leaves the potty after evacuating excrement on the floor members  2 . After a certain period of time has passed since then, the motor  14  is actuated. Thus, the gear  20  connected to the motor  14  is first operated, and then, the other gears  20  are also operated by means of the idle gears  30 . Consequently, the floor members  2  integrally formed with the gears  20  are rotated.  
         [0037]     In such a state, the floor members  2  with the gears  20  integrally attached to their ends are automatically rotated. Thus, the feces of the pet remaining on the grate type floor member  2  also falls down into the excrement tray  5 , and then, the floor members  2  are returned to their initial positions after a predetermined period of time. If the floor members are rotated by 360 degrees, it is not necessary to return the floor members to their initial position.  
         [0038]     When the electric power cannot be supplied or during travel, the present invention will be utilized in the following manner.  
         [0039]     If the owner of the pet rotates the rotary knob  10  formed at one side of the frame  1  after the pet has evacuated excrement, the rotary gear  100  formed at the end of the rotary knob  10  is also rotated. Thus, the gears  20  and the idle gears  30 , which are engaged with the rotary gear  100 , are sequentially rotated, and the floor members  2  integrally formed with the gears  20  are also rotated through 90 to 180 degrees. Therefore, the excrement of the pet automatically falls down into the excrement tray  5 , and then, the owner rotates the rotary knob  10  in a reverse direction to return the floor members  2  to their initial positions.  
       Embodiment 2  
       [0040]      FIG. 3  is a perspective view of a pet potty according to another embodiment of the present invention. The present embodiment shown in  FIG. 3  has the same constitution as Embodiment 1 except that rails  15  are formed on both sides of a bottom surface of the frame  1 ; ledges  51  corresponding to the rails  15  are formed longitudinally along lateral edges of the excrement tray  5  so that the excrement tray  5  can be slid along the rails  15 ; and a grip  50  is also formed at the center of one external surface of the excrement tray  5 .  
         [0041]     Accordingly, the present embodiment is substantially the same as Embodiment 1 in view of their operation. However, they are somewhat different from each other in a way how to dispose of the excrement of the pet. That is, Embodiment 1 is configured such that the frame  1  is first lifted from the excrement tray  5  and the excrement of the pet is then disposed of from the excrement tray  5 , whereas Embodiment 2 is configured such that an action of pulling the grip  50  causes the excrement tray  5  to be removed from the frame  1  in a state where the ledges  51  are slid along the rails  15 .  
       Embodiment 3  
       [0042]      FIG. 5  is a perspective view of a pet potty according to a further embodiment of the present invention, and  FIG. 6  is a sectional view of the pet potty of  FIG. 5 .  
         [0043]     In the present embodiment, the motor  14 , the idle gears  30  and the rotary gear  100  used in Embodiment 1 are not employed, and the following constitution is employed as an alternative of the manual driving mechanism  3 . The alternative mechanism will be discussed below.  
         [0044]     A push plate  150  is formed on the top surface of the frame  1 . A rack  160  is formed on a lower portion of the push plate  150 , and a housing  180  with a spring  170  installed therein is also formed at a lower portion of the rack  160 . A pinion  190  is formed at one side of the rack  160  and fixed to one end of a rotary bar  200 . The other end of the rotary bar  200  is also fixed to a guide rack  201  which is in turn engaged with the gears  20 .  
         [0045]     The operation of the pet potty according to the present embodiment constructed as above will be explained.  
         [0046]     First, a melody speaker  12  optionally provided at the frame generates a melody when a pet leave the potty after evacuating excrement. In such a case, a battery not shown in the figures should be additionally provided for producing the melody from the speaker. However, since the battery has been well known in the art, it will not be further described in this embodiment.  
         [0047]     If the owner of the pet presses down the push plate  150  under these circumstances, the spring  170  resiliently supported within the housing  180  is compressed and the pinion  190  engaged with the rack  160  is rotated on the rack  160 . Then, the guide rack  201  fixed to the other side of the rotary bar  200  is slid rightward as viewed from the figure. Thus, the gears  20 , which are formed at the ends of the floor members  2  and engaged with the guide rack  201 , are rotated to allow the floor member  2  to rotate by a predetermined angle within a range of 90 to 360 degrees.  
         [0048]     Accordingly, the excrement of the pet placed on the floor members  2  falls down into the excrement tray  5 . Further, in order to return the floor members  2  to their initial positions, the aforementioned operation should be simply performed in the reverse manner.  
       Embodiment 4  
       [0049]      FIG. 7  is a perspective view of a pet potty according to a still further embodiment of the present invention, and  FIG. 8  is a sectional view of a portion of the pet potty of  FIG. 7 .  
         [0050]     The present embodiment is different from Embodiment 3 in terms of the constitution of the manual driving mechanism  3 . The constitution of the driving mechanism according to the present embodiment will be discussed below.  
         [0051]     A slot  16  is formed or cut out on one side of the top surface of the frame  1 . A moving lever  17  is inserted in the slot  16 , and a movable rack  18  is also formed at a distal end of the moving lever  17 . Further, the gears  20  attached to the ends of the plurality of floor members  2  are engaged with the movable rack  18 .  
         [0052]     The operation of the pet potty according to the present embodiment constructed as above will be explained.  
         [0053]     First, a melody speaker  12  optionally provided at the frame generates a melody when a pet leave the potty after evacuating excrement. In such a case, a battery not shown in the figures should be additionally provided for producing the melody from the speaker. However, since the battery has been well known in the art, it will not be further described in this embodiment.  
         [0054]     If the owner of the pet shifts the moving lever  17  rightward as shown in  FIG. 8 , the movable rack  18  integrally formed at the end of the moving lever  17  is shifted rightward. Thus, the gears  20 , which are formed at the ends of the floor members  2  and engaged with the movable rack  18 , are rotated to allow the floor members  2  to rotate by a predetermined angle within a range of 90 to 360 degrees. Accordingly, the excrement of the pet placed on the floor members  2  falls down into the excrement tray  5 . Further, in order to return the floor members  2  to their own initial positions, the aforementioned operation should be simply performed in the reverse manner.  
       Embodiment 5  
       [0055]      FIG. 10  is a perspective view of a pet potty according to a still further embodiment of the present invention,  FIG. 11  is an exploded perspective of the pet potty of  FIG. 10 ,  FIG. 12  is a front view of the pet potty of  FIG. 10 ,  FIG. 13  is a sectional view showing a state where the floor members are opened during the operation of the pet potty of  FIG. 10 , and  FIG. 14  is a sectional view showing a state where the floor members are closed during the operation of the pet potty of  FIG. 10 .  
         [0056]     The present embodiment is different from the aforementioned embodiments in the following points that will be hereinafter described in detail.  
         [0057]     Preferably a frame  110  has a rectangular shape. The frame is configured in such a manner that a coupling portion  111  is formed at one side of the frame and a slidable excrement tray  112  is provided at the opposite side thereof. Further, an optional absorbing pad  113  having excellent water absorbency is detachably installed on a floor surface of the excrement tray  112 .  
         [0058]     Furthermore, a plurality of semicircular insertion recesses  114  are formed on another side of the frame and elongated guide insertion slots  115  are also formed inside the semicircular insertion recesses  114 . Semicircular insertion recesses  116  identical to the insertion recesses  114  are also formed on the opposite side thereof.  
         [0059]     A control unit, designated by reference numeral  300 , is inserted and coupled into the coupling portion  111  formed on the frame  110 . A sensor  301  for detecting a pet is provided at the control unit. The sensor may be any type of sensor which may efficiently detects a pet. In the present embodiment, an infrared sensor is preferably used. However, an RF sensor, an acoustic (ultrasonic) sensor, a weight detector and the like may be used within the scope of the invention. Also it should be noted that the sensor may be installed at any proper location in the potty that is adequate to detect a pet staying on The frame  110 . A power switch  302 , a reset button  303 , and a power supply terminal  304  are provided at the control unit. Further, a control board  305 , a reversible motor  306 , and a motor bracket  312  are sequentially installed within the control unit. In addition, a guide gear  307  is connected to the reversible motor  306 .  
         [0060]     Preferably, a plurality of vents  308  through which ozone and negative ions are generated are formed on at least on side of the control unit. An optional dust collecting plate  309  is also installed within the control unit so that the air passing through the vents  308  may be filtered thereby. The ozone is used to kill the bacteria and virus by its strong sterilizing power. That is, the ozone can exterminate harmful germs contained in the excrement of the pet and also remove the bad smell emitted from the excrement. The ozone and the negative ions are discharged through the vents  308 .  
         [0061]     More specifically, when the electric power is applied, negative voltage is applied to a negative electrode pin  301 . Then, negative electrons having high energy sufficient to cause ionization are discharged at a high speed from an end of the sharp negative electrode pin  310 . The electrons discharged from the electrode pin  310  collide against molecules entrained with air, and thus, the negative ions are generated and discharged through the vents  308 . The dust collecting plate  309  serves to collect introduced fine dusts and also to absorb the bad smell of the excrement.  
         [0062]     A guide bar, designated by reference numeral  400 , is inserted into the guide insertion slots  115  and is provided with a rack  401  so that the guide bar can be engaged with the guide gear  307 . A plurality of moving protrusions  402  are also formed in the guide bar.  
         [0063]     Floor members, collectively designated by reference numeral  500 , are formed to have numerous holes perforated thereon. Preferably, each individual floor member  501  has a grate-type structure. Preferably, the cross section of the floor member has of shape as shown in  FIG. 14  in order to render the inside of the potty invisible. Preferably, the floor member  501  may be made of a variety of materials such as synthetic resin, metal, and the like. Each of the floor members is formed with pivot bars  502  at both sides thereof such that the floor member can be pivoted on the pivot bars  502  inserted into the insertion recesses  114  and  116 .  
         [0064]     Meanwhile, the pivot bar  502  at one side of each of the floor members is formed integrally with an inclined moving bar  503  to be inserted into one of moving recesses  403  naturally defined between the adjacent moving protrusions  402 .  
         [0065]     A coupling frame, designated by reference numeral  600 , is coupled on the top of the plurality of floor members  500  and is formed with semicircular recesses  601  at the bottom thereof to define circles in cooperation with the insertion recesses  114  and  116 . The coupling frame  600  is used to prevent the escape of the floor members  500  even when the pet potty is inadvertently turned over by the pet.  
         [0066]     Reference numeral  311  that has not yet been explained designates a battery used when the pet potty is intended to be used at a place where supply of electric power is not available.  
         [0067]     The operation of the pet potty of the present embodiment will be described hereinafter.  
         [0068]     The control unit  300  is first manipulated to set periods of time for determining whether the pet discharged feces or urine while it was staying on the floor member  500  of the pet potty. That is, if the pet stayed a shorter period of time on the potty, it is deemed that the pet has discharged urine. On the other hand, it the pet stayed a longer period of time, the pet is deemed to have discharged feces. If a pet comes onto the floor member  500  in order to urinate, it will stay on the floor member  500  for a relatively short period of time. If the duration of the stay detected by the sensor  301  is shorter than a predetermined threshold, the control unit  300  does not perform any operation after the pet left the floor member  500 , and let the urine fall down into the excrement tray  112 . At this time, since the floor member  500  is constructed to have a grate structure, any additional operation is not required to remove urine from the surface of the floor member  500 . The threshold may be properly set by observing the evacuation habits of various sorts of pets.  
         [0069]     On the other hand, in a case where the pet stays on the floor member  500  for a period of time longer than a predetermined threshold, it is deemed that the pet has discharged feces. Then, the reversible motor  306  is driven and the guide gear  307  coupled to the shaft of the reversible motor  306  is rotated after the pet left the floor member. If the guide gear  307  begins to rotate from its stationary state, the rack  401  that is formed at the leading end of the guide bar  400  and engaged with the guide gear  307  moves back and forth. This causes the guide bar  400  to move back and forth. As the guide bar  400  moves back and forth, as shown in  FIG. 13 , after the pet evacuated feces and left the floor member  500 , the reversible motor  306  is rotated in the clockwise direction for a predetermined period of time or through a predetermined angle and the guide gear  307  is then rotated in the same clockwise direction for a predetermined period of time or through a predetermined angle so that the guide bar  400  moves leftward accordingly. When the guide bar  400  moves leftward in such a manner, the moving bars  503  move leftward and the pivot bars  502  formed integrally with the moving bars  503  are pivoted so that the horizontal floor member  501  can be placed in a vertical posture. At this time, the feces of the pet placed on the floor member  501  falls down into the excrement tray  112 . Thereafter, as shown in  FIG. 14 , the reversible motor  306  is rotated in the counterclockwise direction for a predetermined period of time or through a predetermined angle and the guide gear  307  is then rotated in the same counterclockwise direction for a predetermined period of time or through a predetermined angle so that the guide bar  400  moves rightward accordingly. When the guide bar  400  moves rightward in such a manner, the moving bars  503  move rightward and the pivot bars  502  formed integrally with the moving bars  503  are pivoted so that the vertical floor members  501  can be placed in a horizontal posture. Thus, the floor member  500  is in a position that allows a pet to come onto the floor member for next use. Although the mechanism used to rotate the floor member is explained referring to a specific example, the driving mechanism may be changed and altered in various manner within the scope of the present invention. Some examples of the changes and alterations have been explained with respect to previous embodiments.  
         [0070]     In connection with the basic operation described above, it is more preferred that a bad smell emitted from the excrement of the pet be deodorized by ozone and negative ions generated through the vents  308  preferably formed in the control unit  300 . This uses a property of negative ions that they are heavier than air. The negative ions generated through the vents  308  move toward the floor member  500  and then deodorize the bad smell emitted from the excrement of the pet. The dust collecting plate  309  is provided at the inside of the vents  308  to collect fine dust and deodorize the bad smell entrained with air.  
         [0071]     Although the present invention has been described and illustrated by way of example in connection with the specific preferred embodiments of the present invention, the present invention is not limited thereto. It will be understood that those skilled in the art can make various modifications and changes thereto without departing from the technical spirit and scope of the invention defined by the appended claims.  
       INDUSTRIAL APPLICABILITY  
       [0072]     According to the present invention constructed as above, the excrement of the pet can be conveniently and easily disposed of. Since a melody is generated by the melody speaker as the pet finishes evacuating excrement regardless of whether or not electric power is supplied to the pet potty, the owner of the pet does not have to follow the pet whenever the pet evacuates excrement. Particularly, even upon interruption of electric power, the excrement of the pet can be easily and conveniently disposed of by manual operation of the push plate, moving lever or rotary knob. In addition, the pet potty of the present invention can be automatically operated by determining whether the pet discharged urine or feces based on the time during which the pet stayed on the potty and detected by the sensor. Furthermore, since the plurality of vents are formed in the frame of the potty and negative ions are generated through the vents, the bad smell emitted from the excrement of the pet can be deodorized by the negative ions. Moreover, the dust collecting plate is provided at the inside of the vents so as to collect and deodorize the fine dust and the bad smell entrained with air.