turning to fig1 , a collapsible pet carrier assembly 10 is depicted , configured for attaching to a vehicle seat back 12 . broadly , the pet carrier assembly 10 includes collapsible front and rear walls 14 , 14 ′ and collapsible side walls 16 , 16 ′. front and rear ( not visible in this view ) guide rails 18 , 18 ′ slidingly hold at least the front and rear walls 14 , 14 ′ and secure the pet carrier assembly 10 to the vehicle seat back 12 . in one embodiment , at least one edge of front and rear walls 14 , 14 ′ is pivotally attached to a corresponding end of guide rails 18 , 18 ′ ( see arrow ). a tray 20 is provided which serves as a floor for the pet carrier 10 , optionally including a separate or integral perforated mat 22 . as will be appreciated , the mat 22 provides a surface for a pet ( not shown ) having greater grip , and further allows drainage of liquid onto tray 20 in the event the pet relieves itself . conveniently , tray 20 and mat 22 are removable for ease of cleaning and replacement at need . molded studs or other fasteners ( not visible in this view ) prevent inadvertent dislodgment of the tray 20 / mat 22 when the pet carrier assembly 10 is held in a stored configuration as discussed below . in an embodiment ( see fig2 ), the front and rear walls 14 , 14 ′ are defined by a plurality of intersecting rails 24 , pivotally interconnected one to another to define a collapsible grid structure . a plurality of first rods 26 pivotally connect the edges of front wall 14 to the corresponding edges of rear wall 14 ′, similar in design to a collapsible laundry rack as is known in the art . intersecting rails 24 may be pivotally interconnected by any suitable structure , such as by pins 28 as shown . in turn , for each of front and rear walls 14 , 14 ′, a lowermost end an intersecting rail 24 is pivotally connected to a corresponding end of front and rear guide rails 18 , 18 ′, such as by a pin 29 or in an alternative embodiment ( not shown ) by passing an end of a bottom - most first rod 26 through an aperture in an end of each of front and rear guide rails 18 , 18 ′. as will be appreciated , this feature of a plurality of intersecting rails 24 pivotally interconnected one to another to define collapsible front and rear walls 14 , 14 ′ allows altering a width dimension of front and rear walls 14 , 14 ′ during deployment and collapsing of the pet carrier assembly 10 as will be discussed . an embodiment of side walls 16 , 16 ′ is shown in fig3 . as shown therein , each of side walls 16 , 16 ′ is defined by a plurality of interconnected panels 30 . each panel 30 is configured to pivotally accept a first rod 26 through a first edge thereof . in turn , each panel 30 is likewise configured to pivotally accept a second rod 32 through a second , opposed edge thereof , thus interconnecting the plurality of panels 30 to define a collapsible panel side wall that is substantially solid when the pet carrier 10 is in the deployed configuration . in the depicted embodiment , hinge structures 34 are defined in the first and second edges of the panels 30 to allow interconnection thereof as described . as will be appreciated , this feature of interconnected panels 30 to define collapsible side walls 16 , 16 ′ preserves a width dimension of side walls 16 , 16 ′ during deployment and collapsing of the pet carrier assembly 10 as will be discussed . with reference to fig4 a and 4b , the pet carrier assembly 10 further includes an actuator 36 for retaining the carrier in either the collapsed or the deployed configuration . in one embodiment , the actuator 36 is simply a pushbutton release 38 , including a spring 40 for biasing pushbutton 38 outwardly through a first bore 42 defined in front rail 18 . in this configuration , the pet carrier 10 is in the collapsed configuration shown in fig4 a . to deploy the carrier , a user need only urge the pushbutton 38 rearwardly against spring 40 ( see arrow a ) to clear bore 42 , and may then raise front / rear walls 14 , 14 ′ and side walls 16 , 16 ′ upwardly to a deployed configuration . as the carrier is deployed , the “ footprint ” defined by front / rear walls 14 , 14 ′ and side walls 16 , 16 ′ decreases slightly , and pushbutton 38 translates laterally ( see arrow b ). as the carrier reaches the fully deployed configuration ( see fig7 ), pushbutton 38 reaches and engages a second bore 44 , thus maintaining deployed configuration until a user wishes to collapse the structure . of course , the process of collapsing the carrier is simply the inverse of the process of deploying as described above . turning now to fig5 - 7 , conveniently the pet carrier assembly 10 is secured in the collapsed configuration to an upright vehicle v seatback 12 by guide rails 18 , 18 ′ ( see fig5 ). as shown , front wall 14 is disposed above rear wall 14 ′. in this configuration , actuator 36 is conveniently accessible to a user by way of passenger door d ( not shown in this view , but see fig6 ) when seatback 12 is folded forward . however , although the inverse relationship is also contemplated ( rear wall 14 ′ disposed above front wall 14 ). thus , the pet carrier assembly 10 is conveniently available for use at a moment &# 39 ; s notice , but does not occupy a significant portion of the available storage space of , for example , the vehicle cargo area c . to use the pet carrier assembly 10 , at least the portion of vehicle seat back 12 to which the carrier is secured is folded forward ( see fig6 ). next , the pet carrier is deployed as described above , by operation of actuator 36 , and the carrier is translated to the deployed configuration ( fig7 ). during this translation , as the front / rear walls 14 , 14 ′ and side walls 16 , 16 ′ are raised , the carrier footprint decreases slightly as described above , i . e . front / rear walls 14 , 14 ′ lessen in width and side wall 16 ′ translates towards side wall 16 without altering a width dimension thereof ( note the greater portion of guide rails 18 , 18 ′ visible in the deployed configuration compared to the collapsed configuration of fig6 ). then , actuator 36 engages second bore 44 ( not visible in this view ) to retain the carrier in the deployed configuration . typically , a pet is placed on tray 20 / mat 22 before deploying the pet carrier assembly 10 as described above . this is because after deployment the vehicle roof / headliner is typically sufficiently near a top edge of front / rear walls 14 , 14 ′ and side walls 16 , 16 ′ that the vehicle roof / headliner serves as a de facto lid or top for the pet carrier assembly 10 . however , it will be appreciated that alternative configurations are possible , for example providing a separate lid or top ( not shown ) for a pet carrier assembly 10 having shorter walls or when using the pet carrier assembly in a vehicle having a higher roof / headliner to prevent the pet from inadvertently exiting the carrier . thus , it will be appreciated that a simple , effective vehicle - mounted pet carrier is provided , which is stored in a vehicle without significant negative impact on available storage space in the vehicle . the carrier is easily deployed for use as needed , and equally easily collapsed for storage when not needed . obvious modifications and variations are possible in light of the above teachings . all such modifications and variations are within the scope of the appended claims when interpreted in accordance with the breadth to which they are fairly , legally and equitably entitled .
a deployable pet carrier assembly for a vehicle includes a sliding rail guide system configured to attach the pet carrier to a vehicle seat back and collapsible front , rear , and side walls defining a box structure when deployed . an actuator is provided , configured to retain or release the pet carrier walls for transitioning the pet carrier between a collapsed configuration and a deployed configuration . the sliding guide rail system includes front and rear guide rails configured to slidingly hold the pet carrier front wall and rear wall . a tray may be included to define a floor of the pet carrier .