Patent Publication Number: US-2023158964-A1

Title: Collapsible folding truck trunk

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation application of U.S. patent application Ser. No. 17/089,391, filed on 2020 Nov. 4, which claims priority to Prov. Pat. App. Ser. No. 62/930,548, filed on 2019 Nov. 4 and is a continuation in part application of U.S. patent application Ser. No. 16/432,065, filed on 2019 Jun. 5, now U.S. Pat. No. 11,007,949, which is a continuation application of U.S. patent application Ser. No. 15/796,643, filed on 2017 Oct. 27, now U.S. Pat. No. 10,343,616, which is a continuation application of U.S. patent application Ser. No. 15/666,450, filed on 2017 Aug. 1, now U.S. Pat. No. 9,827,916, which is a continuation-in-part patent application of U.S. patent application Ser. No. 15/397,916, filed on 2017 Jan. 4, now U.S. Pat. No. 9,751,469, which is a continuation of U.S. patent application Ser. No. 15/177,270 filed on 2016 Jun. 8, now U.S. Pat. No. 9,573,530, which is a continuation of U.S. patent application Ser. No. 15/046,203 filed on 2016 Feb. 17, now U.S. Pat. No. 9,566,915 which relates to the U.S. patent application Ser. No. 14/656,476, filed on Mar. 12, 2015, and now U.S. Pat. No. 9,079,548, the entire contents of all the foregoing being expressly incorporated herein by reference. 
    
    
     STATEMENT RE: FEDERALLY SPONSORED RESEARCH/DEVELOPMENT 
     Not Applicable 
     BACKGROUND 
     The various embodiments and aspects described herein relate to a trunk for a bed of a truck. 
     Trucks are typically used to haul material in its bed area from one location to another. However, truck beds have become accessorized so that the truck bed can be used for a variety of uses and more than merely hauling material. By way of example and not limitation, truck beds can be retrofitted with toolboxes, tonneau covers, shells and other accessories that bring additional functionality to truck beds. Unfortunately, these solutions are fixed in that once installed, the user typically does not remove these accessories. Also, if the user needed to remove these accessories from the truck bed, an extended period of time and great strength would be required in order to reconfigure the truck bed between different accessories. 
     Accordingly, there is a need in the art for an improved accessory for bringing additional functionality to a truck bed. 
     BRIEF SUMMARY 
     A trunk for a bed of a truck is disclosed herein. The trunk may have various configurations including but not limited to a first embodiment wherein the trunk is traversable between front and back positions, a second embodiment wherein the trunk is telescoping in addition to being traversable between the front and back positions and a third embodiment wherein the trunk is collapsible in addition to being traversable between the front and back positions. The trunk may provide an isolated enclosed area so that a user may place objects in the trunk, isolated from soiled surfaces of the truck bed. The trunk may also be traversed between front and back positions by someone without great strength and also configured so that the user may use the full length of the bed of the truck. 
     A fourth embodiment involves the trunk that is used in combination with a tonneau cover. The trunk of the fourth embodiment may be traversed between front and back positions as well as have partitions that may be repositioned to enlarge or reduce the size of a trunk space of the fourth embodiment of the trunk. 
     More particularly, a trunk for a bed of a truck is disclosed. The trunk may comprise an enclosure, left and right rails and a back cover. The enclosure may have a top traversable between a lowered closed position and a raised opened position. The left and right rails may be attached to left and right sidewalls of the truck bed and operative to secure the enclosure at a first position wherein a tailgate of the truck bed forms a back wall of the enclosure when the tailgate is in an up position and a second position adjacent to a front wall of the truck bed. The back cover may be attached to a back side of the enclosure when the enclosure is traversed to the second position to form the back wall of the enclosure. 
     The trunk may further comprise support arms that may be pivotally attached to the left and right sidewalls of the enclosure and the top cover for holding the top cover in the raised open position. The support arms may be pivotally attached to the left and right rails or the left and right sidewalls of the enclosure. 
     The enclosure may have a front wall attached to the left and right sidewalls and a bottom wall attached to the front wall and the left and right sidewalls. The back cover may be attached to an underside of the top cover when the enclosure is traversed to the first position and attached to the left and right sidewalls and bottom wall when the enclosure is traversed to the second position. 
     The back cover may form the back wall. The front wall and the left and right sidewalls may have a stepped configuration to accommodate wheel wells of the truck bed so that the enclosure is traversable between the first and second positions by sliding the enclosure horizontally between the first and second positions. 
     The front wall may be pivoted with respect to the top cover. The bottom wall may be pivoted to the front wall. The front and bottom walls may be pivoted to a position under the top cover and parallel thereto for traversing the enclosure between the first and second positions. 
     The left and right sidewalls and the front wall may have upper and lower halves that telescope with respect to each other between an up position and a down position. The enclosure may slide horizontally between the first and second positions on the truck bed when the lower half is in the up position. 
     A vertical height of the back cover may be about equal to a vertical height of the left and right sidewalls when the left and right sidewalls are in the up position. 
     The left and right rails may have a first part of a male/female connection extending along a length of the rails. The left and right sidewalls of the enclosure may have a second part of the male/female connection wherein the second part slides against the first part as the enclosure is traversed between the first and second positions. The male/female connection may have a detent mechanism to maintain the enclosure in the first or second positions. 
     The trunk may further comprise a locking mechanism that traverses left and right bars under the left and right rails to prevent the top cover from inadvertently traversing to the raised open position. 
     The trunk may further comprise a protective liner. The protective liner may have a plurality of reliefs on a front wall and left and right sidewalls of the protective liner to allow a user to compress the protective liner during insertion or removal of the protective liner from within the enclosure. 
     In another aspect, a storage compartment for a bed of a truck configurable into two or more positions for providing a versatile storage solution is disclosed. The system may comprise a left rail, a right rail, a top cover and a plurality of panels. The left rail may be secured to a left sidewall of the truck bed. The right rail may be secured to a right sidewall of the truck bed. The top cover may be pivotally attached to the left and right rails at either a first position or a second position. The first position may be closer to a tailgate of the truck bed compared to the second position. The plurality of panels may be deployed so as to define a storage volume with either the tailgate when the top cover is in the first position or with a back wall when the top cover is in the second position and the sidewalls of the truck bed. 
     The top cover may have a latching mechanism traversable between a locked position and an opened position. In the locked position, locking bars extend laterally outward so that opposed distal end portions of the latching mechanism are disposed under lips of the left and right sidewalls of the truck bed or the left and right rails. 
     In a different aspect, a method of reconfiguring a trunk attached to a bed of a truck is disclosed. The method may comprise the steps of unlocking the trunk so that the trunk is operative to be horizontally slid to first or second positions, a tailgate of the truck bed forming a part of an enclosed space of the trunk when the trunk is in the first position, the trunk being closer to a cab of the truck when the trunk is in the second position; sliding the trunk to the second position; attaching a back wall of the trunk to form the enclosed space; locking the trunk to the second position; and pivoting a cover of the trunk to an up position so that a full length of the truck bed is available for use. 
     The method may further comprise a step of collapsing upper and lower telescoping sections of the trunk. The collapsing step may include the step of lifting the lower section into the upper section. 
     The method may further comprise a step of pivoting a bottom wall and a front wall upon each other under a cover of the trunk. 
     The sliding step may include a step of traversing a tongue of the trunk within elongate grooves of rails attached to left and right sidewalls of the bed of the truck. 
     In another aspect, a truck with a truck bed convertible into a trunk is disclosed. The truck may comprise the truck bed, a tonneau cover, a driver side rail, a passenger side rail and a trunk. The truck bed may define a front wall, a passenger side sidewall, a driver side sidewall and a tailgate pivotable between an opened position and a closed position. The tonneau cover may be pivoted and attached to a forward portion of the truck bed closer to the front wall than the tailgate. The tonneau cover may be pivoted between an opened up position and a closed down position. The driver side rail may be attached to and extend horizontally along the driver side sidewall. The passenger side rail may be attached to and extend horizontally along the passenger side sidewall. The trunk may extend across a width of the truck bed and be slidably attached to the driver side and passenger side rails so that the trunk is slidable along a length of the bed and securable in at least two different positions. 
     The trunk may define an upper edge that is vertically higher than a lower edge of the tonneau cover so that rain cascades down the tonneau cover and over the trunk. Alternatively, the trunk may define an upper edge below a lower edge of the tonneau cover. 
     The trunk may have stepped side walls to accommodate wheel wells protruding into the truck bed. The trunk may have a rear wall with an opening and a selectively positionable panel. The trunk may have first and second sets of slots. The first set of slots may be formed in between the front wall of the trunk and the rear wall. The second set of slots may be formed near the rear wall to close the opening of the rear wall. The trunk may be fabricated from a rigid or resilient material. 
     The tonneau cover may extend from the front wall to the tailgate to cover the entire truck bed. 
     The driver side rail and the passenger side rail may be attached to interior sides of the driver side sidewall and the passenger side sidewall. 
     Opposed sides of the trunk may be received into the driver side and passenger side rails so that the trunk may be traversed horizontally within the truck bed. 
     According to yet another aspect, there is provided a collapsible folding truck trunk for use with a vehicle including a storage area having a wheel well extending into the storage area is disclosed. The collapsible folding truck trunk comprises a base wall including a plurality of base panels pivotally connected to each other, and a side wall pivotally connected to the base wall. The side wall extends from the base wall and terminates at an upper edge. The side wall and base wall collectively define a storage cavity. The base wall and the side wall each have an expandable portion conformable to the wheel well in response to placement of the base wall and the side wall over the wheel well. The collapsible folding truck trunk is selectively transitional between a collapsed configuration and a deployed configuration. In the collapsed configuration, the plurality of base panels overlap each other, and in the deployed configuration, the plurality of base panels are co-planar to each other. The upper edge of the side wall moves away from the base wall as the collapsible folding truck trunk transitions from the collapsed configuration toward the deployed configuration. 
     The expandable portion of the base wall and the side wall may be comprised of an elastic sheet. 
     Each of the plurality of base panels may be of a quadrangular configuration. 
     The side wall may be comprised of plurality of side wall panels. The side wall may extend around the base wall. The side wall may include a cutout formed therein, with the cutout extending from the upper edge and toward the base wall. 
     The collapsible folding truck trunk may additionally include a divider selectively engageable with the base wall to divide the storage cavity into two discrete regions. The collapsible folding truck trunk may further comprise a hook and loop fastener coupled to the divider and the base wall for facilitating selective engagement between the divider and the base wall. 
     The collapsible folding truck trunk may include a cover engageable with the side wall to extend over the storage cavity. The cover may be engageable with the side wall via a zipper. 
     In still a further embodiment, there is provided a collapsible folding truck trunk for use in a truck bed having a wheel well and a rear end. The collapsible folding truck trunk includes a base wall comprised of a plurality of base panels pivotally connected to each other, and a side wall pivotally connected to the base wall. The side wall extends from the base wall and terminates at an upper edge, with the side wall and base wall collectively defining a storage cavity. The collapsible folding truck trunk is selectively transitional between a collapsed configuration and a deployed configuration. In the collapsed configuration, the plurality of base panels overlap each other, and in the deployed configuration, the plurality of base panels are co-planar to each other. The upper edge of the side wall moves away from the base wall as the collapsible folding truck trunk transitions from the collapsed configuration toward the deployed configuration. The collapsible folding truck trunk is sized and structured to be placeable between the wheel well and the rear end of the truck bed when the collapsible folding truck trunk is in the deployed configuration. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       These and other features and advantages of the various embodiments disclosed herein will be better understood with respect to the following description and drawings, in which like numbers refer to like parts throughout, and in which: 
         FIG.  1    illustrates a first embodiment of the trunk traversed to a back position; 
         FIG.  2    illustrates the trunk with a lid and tailgate in an open position; 
         FIG.  2 A  illustrates an exploded view of the trunk shown in  FIG.  2   ; 
         FIG.  3    illustrates the trunk traversed to a front position with the lid in the open position; 
         FIG.  4    illustrates the trunk shown in  FIG.  3    with a back panel forming an enclosed space; 
         FIG.  5    illustrates the trunk shown in  FIG.  4    with the lid in a closed position; 
         FIG.  6    illustrates a second embodiment of the trunk traversed to a back position; 
         FIG.  7    illustrates the trunk with the lid and the tailgate in the open position; 
         FIG.  7 A  illustrates an exploded view of the trunk shown in  FIG.  7   ; 
         FIG.  8    illustrates the trunk in a collapsed position; 
         FIG.  9    illustrates the trunk shown in  FIG.  8    traversed to a front position; 
         FIG.  10    illustrates the trunk shown in  FIG.  9    with a back panel mounted thereto to form the enclosed space; 
         FIG.  11    illustrates the trunk with the lid in a closed position; 
         FIG.  12    is a third embodiment of the trunk traversed to a back position; 
         FIG.  13    illustrates the trunk with the lid and the tailgate in the open position; 
         FIG.  13 A  illustrates an exploded view of the trunk shown in  FIG.  13   ; 
         FIG.  14    illustrates a bottom panel being folded upward to traverse the trunk in an undeployed state; 
         FIG.  15    illustrates the trunk with a front panel being folded upward to traverse the trunk in the undeployed state; 
         FIG.  16    illustrates the trunk being traversed to the front position; 
         FIG.  17    illustrates the trunk with the front panel being unfolded to traverse the trunk in the deployed state; 
         FIG.  18    illustrates the trunk with the bottom panel being unfolded to traverse the trunk in the deployed state; 
         FIG.  19    illustrates a back panel being mounted to the trunk to form the enclosed space; 
         FIG.  20    illustrates the trunk with the lid in the closed position; 
         FIG.  21    illustrates the trunk in the undeployed state mounted to a roof of a cab of a truck; 
         FIG.  22    illustrates the trunk shown in  FIG.  21    with the lid in an up position; 
         FIG.  23 A  illustrates a locking mechanism of the lid; 
         FIG.  23 B  illustrates the locking mechanism shown in  FIG.  23 A  incorporated into the trunk and bed of the truck; 
         FIG.  24    is an exploded perspective view of the third embodiment of the trunk and the trunk liner; 
         FIG.  25    illustrates the trunk liner inserted into the trunk shown in  FIG.  24   ; 
         FIG.  26    illustrates the trunk liner being folded along with the trunk; 
         FIG.  27    illustrates a fourth embodiment of the trunk in combination with a tonneau cover; 
         FIG.  28    illustrates the trunk shown in  FIG.  27    with the tonneau cover in a raised position and a partition disposed against the front wall of a trunk; 
         FIG.  29    illustrates the trunk shown in  FIG.  28    with the partition disposed in a middle of the trunk; 
         FIG.  30    illustrates the trunk traversed to a back position with the partition removed from the trunk; 
         FIG.  31    illustrates the trunk in the back position with the partition installed at a rear position of the trunk; 
         FIG.  32    is an enlarged view of the trunk and the tonneau cover; 
         FIG.  33    is an upper perspective view of a pickup truck having a truck bed, with a cover extending over the truck bed; 
         FIG.  34    is an upper perspective view of the pickup truck of  FIG.  33   , with the cover being removed from the truck bed to expose a collapsible folding truck trunk stored in the truck bed adjacent a cab of the pickup truck; 
         FIG.  35    is an upper perspective view of the pickup truck and collapsible folding truck trunk of  FIG.  34   , with the collapsible folding truck trunk being moved away from the cab to facilitate unfolding of the collapsible folding truck trunk; 
         FIG.  36    is an upper perspective view of the pickup truck and collapsible folding truck trunk, with the collapsible folding truck trunk being an a partially deployed configuration; 
         FIG.  37    is an upper perspective view of the pickup truck and collapsible folding truck trunk, with the collapsible folding truck trunk including a primary unit completely unfolded, and a dividing wall exploded from the primary unit; 
         FIG.  38    is an upper perspective view of the pickup truck and collapsible folding truck trunk, with the primary unit being placed over a wheel well; 
         FIG.  39    is an upper perspective view of the pickup truck and another embodiment of the collapsible folding truck trunk sized to fit between the wheel well and a rear end of the truck bed; and 
         FIG.  40    is an upper perspective view of the pickup truck and the collapsible folding truck trunk in a collapsed configuration and stored in the cab of the pickup truck 
         FIG.  41    illustrates a first embodiment of the trunk traversed to a back position within the truck bed; 
         FIG.  42    illustrates the trunk with the truck tailgate in the open position; 
         FIG.  43    illustrates the trunk traversed to a front position above the open truck tailgate; 
         FIG.  44    illustrates the trunk with a top cover in an open position above the open truck tailgate; 
         FIG.  45    illustrates the trunk with the top cover and the front cover in an open position; 
         FIG.  46    illustrates the trunk with a storage item placed in the central compartment of the trunk; 
         FIG.  47    illustrates the trunk with the top cover in an open position, the front cover in a closed position, and additional storage items placed in the left compartment; 
         FIG.  48    illustrates the trunk with the trop and front covers in a closed position in a front position above the open truck tailgate; 
         FIG.  49    illustrates the trunk traversed to a rear position juxtaposed next to the truck cabin; 
         FIG.  50    illustrates the trunk with a top cover in an open position juxtaposed next to the truck cabin; 
         FIG.  51    illustrates the trunk with the top cover and the front cover in a closed position, traversed to a front position juxtaposed next to the closed truck tailgate; 
         FIG.  52    illustrates a second embodiment of the trunk traversed to a back position within the truck bed, where the truck has a cover designed to cover the truck bed; 
         FIG.  53    illustrates the truck having an open cover and an open tailgate showing the trunk having a closed top cover and front cover; 
         FIG.  54    illustrates the trunk traversed to a front position above the open truck tailgate having an open top cover and front cover with a storage item ready to be placed in the central compartment; 
         FIG.  55    illustrates a third embodiment of the trunk traversed to a back position within the truck bed having wheels resting in recessed tracks of the truck bed and coupled to a cable in the retracted position; 
         FIG.  56    illustrates the trunk traversed to a front position above the open tailgate, wherein the trunk has wheels resting in recessed tracks of the tailgate and coupled to the cable in an extended position; and 
         FIG.  57    illustrates a fourth embodiment of the trunk coupled to a truck bed rail that extends to align with a tailgate rail. 
     
    
    
     DETAILED DESCRIPTION 
     Referring now to the drawings, a trunk  10 ,  12 ,  14 ,  300 ,  436 ,  536  for a bed  16  of the truck  18  is shown in  FIGS.  2 A,  7 A   13 A,  28 ,  38 , and  39 . The trunk  10 ,  12 ,  14 ,  300 ,  436 ,  536  provides an isolated space within the bed  16  of the truck  18  in that various panels of the trunk  10 ,  12 ,  14 ,  300 ,  436 ,  536  provide a barrier from surfaces of the bed  16  of the truck  18  so that objects (e.g., groceries) may be placed in the trunk  10 ,  12 ,  14 ,  300 ,  436 ,  536  and protected from dirt on the surfaces of the bed  16  of the truck  18 . The trunk  10 ,  12 ,  14  may be positioned in a back position, as shown in  FIGS.  1 ,  6 ,  12  and  31   . Alternatively, the trunk  10 ,  12 ,  14  may also be horizontally traversed to a front position as shown in  FIGS.  5 ,  11 ,  20  and  28   . The trunk  10 ,  12 ,  14 ,  300  may be easily traversed between the front and back positions so that great strength is not required to reconfigure the position of the trunk  10 ,  12 ,  14 ,  300  within the truck bed  16 . Weaker people may reconfigure the trunk  10 ,  12 ,  14 ,  300  between the front and back positions without assistance or help from another person. Additionally, in both the front and back positions, the trunk  10 ,  12 ,  14 ,  300  may provide an enclosed space that may be locked to provide security for items placed within the enclosed space. Additionally, in  FIGS.  27 - 32   , the trunk  300  may comprise a tonneau cover  302  and a trunk  304 . 
     Referring now more particularly to  FIGS.  1 - 6   , the trunk  10  may be horizontally slidable and mounted to the left and right rails  20 ,  22  (see  FIG.  2 A ) that are attached to upper lips  24 ,  26  of left and right side walls  28 ,  30 . The trunk  10  may be traversed to the back position so that groceries  32  and other items may be easily placed in the trunk  10  (see  FIG.  2   ) and retrieved therefrom. To open the trunk  10 , the user may lift up a lid  34  of the trunk  10  and/or pull down a tailgate  36  of the truck bed  16 . The trunk  10  may also be easily traversed to the front position by sliding the trunk  10  in a horizontal direction  40  (see  FIG.  3   ) toward the cab  38  of the truck  18 . When the trunk  10  is in the front position, panel  42  may be removed from an underside of the lid  34  and fixed in place in order to form the enclosed space of the trunk  10  as shown in  FIG.  4   . Alternatively, as shown in  FIG.  3   , the back panel  42  may remain secured under the lid  34  and the lid  34  flipped up so that a motorcycle  88  may be loaded onto the bed  16  of the truck  18  thereby utilizing a full length of the truck bed  16 . 
     The trunk  10  may include a front panel  44 , a bottom panel  46 , left and right sections  48 ,  50 , the lid  34  and the back panel  42  as shown in  FIG.  2   . The bottom panel  46  may be rigidly fixed to the front panel  44 . The left and right sections  48 ,  50  may be identical but mirror images of each other and have a step  52 ,  54  that accommodates the left and right wheel wells  56 ,  58  of the truck bed  16  so that the trunk  10  may be easily traversed between the front and back positions without having to vertically lift the trunk  10  over the wheel wells  56 ,  58  of the truck bed  16 . The bottom panel  46  may be disposed close to but not in contact with a floor  60  (see  FIG.  2 A ) of the truck bed  16  so that the trunk  10  may easily slide in the horizontal direction. The left and right sections  48 ,  50  have steps  52 ,  54 . The steps  52 ,  54  are positioned above the highest point  62  of the wheel wells  56 ,  58 . The highest point of the wheel well  58  is not shown but is identical to the highest point  62  of the wheel well  56 . 
     The trunk  10  may be horizontally slidable and mounted to the left and right side walls  28 ,  30  of the truck bed  16 . In particular, left and right rails  20 ,  22  of the trunk  10  may be fixedly secured to the upper lips  24 ,  26  of the left and right side walls  28 ,  30  of the truck bed  16 . In order to secure the left and right rails  20 ,  22  to the upper lips  24 ,  26  of the left and right side walls  28 ,  30  of the truck bed  16 , the left and right rails  20 ,  22  may be bolted to the upper lips  24 ,  26  of the left and right side walls  28 ,  30 . Alternatively, the left and right rails  20 ,  22  may have enlarged nubs  64  that fit within the keyhole shaped slot  66  formed in the upper lips  24 ,  26  of the left and right side walls  28 ,  30 . The left and right sections  48 ,  50  may have tongues  68 ,  70  that fit within the grooves  72 ,  74  of the left and right rails  20 ,  22 . Preferably, the tongues  68 ,  70  and the grooves  72 ,  74  may have a wedge-shaped configuration that slideably mates with each other. Moreover, the grooves  72 ,  74  may optionally have ball bearings that help to support the trunk  10  and to allow convenient and easy horizontal traversal of the trunk  10  between the back and front positions on the rails  20 ,  22 . 
     The left and right sections  48 ,  50  may have a cross-sectional configuration that conforms to a cross-sectional inner profile of the left and right side walls  28 ,  30  including its wheel wells. In this regard, the left and right sections  48 ,  50  may be close to but do not contact the left and right side walls  28 ,  30  and the wheel wells  56 ,  58  of the truck bed  16  to allow for horizontal traversal of the trunk  10  between the front and back positions without vertical lifting or traversal of the trunk  10 . 
     The trunk  10  may be secured in the front or back positions by way of a set screw  76 . When the trunk  10  is in the back position, the set screws  76  are engaged in the holes  78 . The set screws  76  push down and frictionally engage the tongues  68 ,  70  to prevent movement of the trunk  10 . When the trunk  10  is in the front position, the set screws  76  are engaged in the holes  80 . The set screws  76  push down and frictionally engage the tongues  68 ,  70  of the trunk  10  to prevent horizontal movement of the trunk  10 . Alternatively or additionally, a detent may be incorporated into the trunk  10  and rails  20 ,  22 . The detent may be operative to lock the trunk  10  in either the back position or the front position. 
     To install the trunk  10  to the truck bed  16 , the left and right rails  20 ,  22  are attached to the left and right side walls  28 ,  30  of the truck bed  16 . As discussed above, there are at least two methods of attaching or fixedly securing the left and right rails  20 ,  22  to the side walls  28 ,  30 . In particular, the keyhole shaped slot  66  may be formed in the upper lips  24 ,  26  of the truck bed  16 . These keyhole shaped slots receive nubs  64  of the left and right rails  20 ,  22 . The nubs  64  are inserted into the keyhole shaped slot and secured thereto in order to fix the left and right rails  20 ,  26 . Alternatively, the left and right rails  20 ,  22  may be bolted to the upper lips  24 ,  26  of the left and right side walls  28 ,  30 . The left and right rails  20 ,  22  have grooves  72 ,  74 . These grooves  72 ,  74  are directed inwardly toward the center of the bed  16  of the truck. These grooves  72 ,  74  may run the entire length or a substantial portion of the length of the truck bed  16  so that the trunk  10  may be traversed horizontally between the front and back positions without having to lift the trunk  10  vertically. As shown and described, the grooves  72 ,  74  formed on the left and right rails  20 ,  22  which receive the tongues  68 ,  70  of the trunk  10 . However, the opposite situation is contemplated in that the grooves  72 ,  74  may be formed on the trunk  10  which receives tongues  68 ,  70  formed in the rails  20 ,  22  along the length of the rails  20 ,  22 . 
     Before tightening the left and right rails  20 ,  22  to the upper lips  24 ,  26  of the left and right side walls  28 ,  30 , the left and right rails  20 ,  22  may be slightly loose so as to be capable of rattling. In this state, the tongues  68 ,  70  of the trunk  10  may be inserted into the respective grooves  72 ,  74  of the left and right rails  20 ,  22 . With the tongues  68 ,  70  disposed within the grooves  72 ,  74 , the left and right rails  20 ,  22  may now be adjusted and tightened onto the upper lips  24 ,  26  of the left and right side walls  28 ,  30 . 
     The tongues  68 ,  70  are linearly traversable within the grooves  72 ,  74  to allow the trunk  10  to be horizontally traversable between the front and back positions. By being horizontally traversable, a person that might not be that strong may easily move the trunk  10  between the front and back positions depending on the desired use or nonuse of the trunk  10 . If the trunk  10  is in the back position, the user may use the trunk  10  as a normal place to carry his or her groceries. If the trunk  10  is in the front position, then the user may use the trunk  10  similar to a toolbox. Alternatively, the lid  34  of the trunk  10  may be disposed in the up position so that the user may place a motorcycle  88  in the bed  16  of the truck as shown in  FIG.  3   . 
     The lid  34  of the trunk  10 ,  12 ,  14  is lockable in the down position (see  FIG.  1   ). Referring to  FIG.  23 A , B, the lid  34  may have a mechanism  82  with arms  84  that may extend under the upper lips  24 ,  26  of the left and right sidewalls  28 ,  30  to lock the lid  34  in the down position. In order to traverse the lid  34  to the up position (see  FIGS.  2   ), the user turns a lock  86  in the counterclockwise direction so that the arms  84  may clear the lips  24 ,  26  of the side walls  28 ,  30 . The lid  34  may then be pivoted upward to the up position and may be locked or supported in the up position by shocks  134 . The lid  34  is pivotable about an upper edge of the front panel  44 . 
       FIG.  1    illustrates a trunk  10  installed on the truck bed  16  with the trunk  10  in the back position. The trunk  10  is used to isolate things such as grocery bags from the soiled surfaces of the truck bed  16  so that things such as grocery bags do not become soiled by the dirt on the surfaces of the truck bed. The trunk  10  may be opened in one of two ways, namely, by lifting up the lid  34  or pulling down the tailgate  36  of the truck bed  16 . To move the trunk  10  from the back position to the front position, the user releases the trunk  10  either by loosening set screws  76  or releasing detents. The trunk  10  is traversed forward in the direction of arrow  40  and locked into place with set screws  76  or detent. In the front position, the trunk  10  may be moved out of the way by simply lifting the lid  34  as shown in  FIG.  3   . In this manner, a motorcycle  88  may be loaded and transported in the bed  16  of the truck  18 . Alternatively, the trunk  10  may form an enclosed space by removing the back panel  42  and engaging the back panel  42  to the bottom panel  46  and the left and right sections  48 ,  50 , as shown in  FIG.  4   . To remove the back panel  42  from the lid  34 , straps  90  under the lid  34  with hooks and loops may be released. The back panel  42  may be secured to the bottom panel  46  and the left and right sections  48 ,  50  via means known in the art or developed in the future. The lid  34  may extend beyond upper edges of the front panel  44 , back panel  42  and left and right sections  48 ,  50  so that rainwater does not enter the enclosed space of the trunk  10 . Moreover, other water sealing or water proofing methods that are known in the art or developed in the future may be incorporated into the trunk  10 . 
     Referring now the  FIGS.  6 - 11   , a second embodiment of the trunk  12  is shown. The trunk  12  is identical to the trunk  10  except that the trunk  12  has upper and lower telescoping sections  100 ,  102 . Additionally, the trunk  12  does not have steps in the left and right sections as in the truck embodiment shown in  FIGS.  1 - 6    to allow for the wheel wells of the truck bed  16 . 
     The trunk  12  may be disposed either in front of or behind the wheel wells  56 ,  58  of the truck bed  16  since the left and right sections  48   a ,  50   a  are not contoured to the corresponding shape of the wheel wells  56 ,  58 . Rather, the left and right sections  48   a  and  50   a  are vertically flat. The trunk  12  provides more room in the width direction of the enclosed space since the left and right sections  48 ,  50  do not have the steps  52 ,  54  as in trunk  10 . 
     The trunk  12  is traversable between the front and back positions as shown in  FIGS.  6  and  11   . The trunk  12  is traversed in the horizontal direction when traversed between the front and back positions so that a mother or a person that does not have great strength may reconfigure the trunk  12  as needed either for storing things such as groceries or reconfiguring the trunk  12  so that a motorcycle may be loaded on the truck bed  16 . In order to traverse the trunk  12  between the front and back positions, the lower section  102  must be collapsed into the upper section  100 , as shown in  FIG.  8   . By doing so, the lower section  102  clears the wheel wells  56 ,  58  of the truck bed  16  so that the trunk  12  may be horizontally traversed to the front position, as shown in  FIG.  9   . The same is also true when the trunk  12  is traversed from the front position to the back position. The lower section  102  must be raised and collapsed into the upper section  100  so that the lower section  102  clears the wheel wells  56 ,  58  of the truck bed  16  when traversing the trunk  12  between the front and back positions. 
     The lid  34  may be larger than the upper section  100  and the lower section  102  may be slightly smaller than the upper section  100 . When water that falls on the lid  34  the water cascades onto the upper section  100 , and in turn cascades onto the lower section  102 . In this manner, the trunk  12  does not collect water in the enclosed space. Water also cascades off of the lid  34  and onto the tailgate of the truck bed  16  since the lid  34  extends over the tailgate as shown in  FIG.  6   . The oversized nature of the lid  34  is also incorporated into the trunks  10 ,  14 . 
     The upper and lower sections  100 ,  102  may be fabricated from left and right panels  104 ,  106 ,  108 ,  110 . The left and right panels  104 ,  106 ,  108 ,  110  are attached to front panel&#39;s  112 ,  114  of the upper and lower section  100 ,  102 . As discussed above, the lower section  102  slides up and down within the upper section  100 . The lower section  102  may slide within the upper section  100  via various means such as but not limited to rails, tongue and groove connections, gear and pinion, etc. Moreover, the lower section  102  may be traversable between an up position wherein the lower section  102  is collapsed into the upper section  100  or down position wherein the lower section  102  is extended away from the upper section  100  to form an enlarged enclosed space. 
     The lower section  102  may be retained in the up or down positions with a clamp or detent mechanism known in the art or developed in the future. 
     Additionally, when the trunk  12  is disposed in the front position as shown in  FIG.  10   , a back panel  42   a  may be removed from the underside of the lid  34  by undoing straps  92   a . The straps  92   a  may be lined with hook and loop fasteners which are removed in order to release the back panel  42   a  from the lid  34 . The back panel  42   a  mounts onto the upper section  102  and/or the lower section  100  in order to form the enclosed space of the trunk  12 . The back panel  42   a  is shown as being short in order to fit on the trunk  12  when the lower section  102  is collapsed into the upper section  100 . However, it is also contemplated that the back panel  42   a  may be taller so that the back panel  42   a  may fit onto the trunk  12  when the lower section  102  is in the down position and the trunk  12  is in the front position. When the back panel  42   a  is mounted to the trunk  12 , the back panel  42   a  may form the enclosed space within the trunk  12 . The back panel  42   a  may extend from the bottom panel to the lid  34  when closed. The lower section  102  is shown as being in the up position when the trunk  12  is in the front position. However, it is also contemplated that the lower section  102  may be in either the up or down positions when the trunk  12  is in the front position. 
     When the trunk is in the back position as shown in  FIGS.  7  and  8   , the user has an option of either creating a larger enclosed space by positioning the lower section  102  in the down position or creating a smaller enclosed space by traversing the lower section  102  to the up position, as shown in  FIG.  8   . Likewise, when the trunk  12  is in the front position as shown in  FIG.  10   , the user may create a smaller enclosed space by traversing the lower section  102  to the up position and fitting the back panel  42   a  as shown in  FIG.  10   . Alternatively, the user may remove the back panel  42   a  and secure it  42   a  to the underside of the lid  34  and draw the lower section  102  to the down position. With the lid  34  pivoted upward as shown in  FIG.  10   , the user may load a motorcycle onto the bed  16  of the truck  18 . Alternatively, the trunk  12  may be provided with two different back panels  42   a . These two different back panels  42   a  may be a short back panel  42   a  wherein the short back panel  42   a  mounts to the trunk  12  when the lower section  102  is disposed in the up position. The larger of the two back panels  42   a  may be mounted to the trunk  12  when the lower section  102  is disposed in the down position. In this regard, the trunk  12  is capable of providing a larger or smaller enclosed space. 
     Referring now to  FIGS.  12 - 22   , the trunk  14  is illustrated. The trunk  14  is identical to trunk  10  except in the following manner. The trunk  14  is traversable between front and back positions as shown in  FIGS.  12  and  20    when deployed. The trunk  14  also has various stowaway configurations shown in  FIGS.  15 ,  16  and  20   . In  FIG.  15   , the trunk  14  is being transitioned to an undeployed state wherein the lid  34  is secured to the upper lips  24 ,  26  of the left and right side walls  28 ,  30  of the truck bed  16 . Objects may be slid under the undeployed trunk  12  that can fit through opening  130 . 
       FIG.  16    illustrates the undeployed trunk  12  being traversed to the front position. The trunk  12  may be locked to the front position in the undeployed position so that objects may be placed at the rear of the truck bed  16 , if desired. Similarly, objects can be slid under the undeployed trunk  12 . Moreover, if desired, the trunk  12  in its undeployed state may be mountable to a rooftop  132  of the cab  38  of the truck  18  so that the user may have full access to the entire area of the truck bed  16 . 
     More particularly, the trunk  14  may be pivotally secured to the bed  16  in either the front or back positions, as shown in  FIGS.  13  and  18    as well as on the roof  132  of the cab  38  shown in  FIG.  22   . The lid  34  may be held in the up position by way of shocks  134 . The shocks  134  have an extended position shown in  FIGS.  13  and  18   . In the extended position, the shocks  134  lift the lid  34  upward a sufficient distance so that a motorcycle may be disposed in the trunk  14  or the truck bed  16 . In a half extended position, as shown in  FIG.  22   , the lid  34  functions as a spoiler. As such, the shocks  134  pivot the lid  34  upwards a bit along its front edge in order to create downward pressure as the truck  18  moves forward. When the trunk  14  is disposed at either the front or back positions, the shocks  134  are pivotally secured to both the lid  34  and the upper lips  24 ,  26  of the left and right side walls  28 ,  30  of the truck bed  16 . When the lid  34  is pivoted downward, the shocks  134  collapse to allow for the pivoting motion of the lid  34 . 
     The trunk  14  may have a front panel  150 , bottom panel  152  and a back panel  154 . The front panel  115  is pivotally attached to a front of the lid  134  so that the front panel  150  may be folded under the lid  34 . Additionally, the bottom panel  152  is pivotally attached to a lower edge of the front panel  150 . Moreover, the bottom panel  152  and the back front panel  150  may be folded under the lid  34  and locked in position in order to have full access to the truck bed  16  as described above. Additionally, the bottom panel  152  may additionally have left and right relief panels  156 ,  158  that accommodate the wheel wells  56 ,  58 . When the trunk  14  is in the back position, the relief panels  156 ,  158  are co-planer with a bottom panel  152 . However, when the trunk  14  is in the front position, the relief panels  156 ,  158  may be pitched upward against the wheel wells  56 ,  58 , as shown in  FIG.  18   . In the back position, the tailgate forms an enclosed space of the trunk  14 . In the front position, the back panel  154  may be removed from the underside of the lid  34  by undoing the straps  92  and securing the back panel  154  to the bottom panel  152  in the left and right side walls  28 ,  30 . 
     In all of the trunks  10 ,  12 ,  14  described herein, the lid  34  may have left and right grooves  94 ,  96 . These grooves  94 ,  96  receive the upper lips  24 ,  26  of the left and right side walls  28 ,  30  so that water that drips on the lid  34  cascades off of the trunk  10 ,  12 ,  14  and onto the side walls  28 ,  30  of the truck bed  16 . Moreover, the back side of the trunk  10 ,  12 ,  14  may have a skirt  98  that overhangs the tailgate of the truck bed  16  so that water that drips on the trunk  14  cascades over the lid  34  and onto the tailgate in order to create a water resistant enclosed space within the trunk  10 ,  12 ,  14 . 
     The trunks  10 ,  12 ,  14  may all define a length  200  which is less than a length  202  of the truck bed  16 . The length  202  of the truck bed  16  may be between about 70 inches to about 105 inches. The length  200  of the trunk  10 ,  12 ,  14  may be about one half or less of the length  202  of the truck bed  16 . Preferably, the length  200  of the trunk  10 ,  12 ,  14  may be about 20 inches to about 35 inches. 
     The trunks  10 ,  12 ,  14  may be fabricated from various materials including but not limited to carbon fiber, injection molded plastic, metal, aluminum, steel and other materials known in the art or developed in the future that is resistant to degradation from UV rays and environmental pressures such as rain, wind and dust. 
     The trunks  10 ,  12 ,  14  all define an enclosed space within the various panels and the lid  34 . It is also contemplated that the enclosed space may be sealed from the environment with weatherstripping, gasket and other sealants to prevent water from entering the enclosed space when raining. 
     Referring now to  FIGS.  24 - 26   , a barrier  250  is shown. The barrier  250  is shown as being used in conjunction with trunk  14 . However, the barrier  250  may also be used in conjunction with trunks  10 ,  12 . As shown in  FIG.  25   , the barrier  250  may be inserted into the enclosed space defined by the trunk  14 . The barrier  250  may have left and right side walls  252 ,  254  and front wall  256  as well as bottom floor  258 . The barrier  250  may be fabricated from an elastomeric material to allow the barrier  250  to collapse or be folded as shown in  FIG.  26    which illustrates the trunk  14  being traversed to the undeployed state. As shown in  FIGS.  24  and  25   , the left and right side walls  252 ,  254  may have a diagonal crease  260 . When the bottom panel  152  is pivoted upward as shown in  FIG.  26   , the left and right side walls  252 ,  254  bend at the diagonal crease  260  to allow the barrier  250  to fold into a flat configuration so that the trunk  14  may be traversed to the undeployed state as shown in  FIGS.  16  and  21   . 
     Referring now to  FIGS.  27 - 32   , the trunk  300  is shown as being horizontally traversable and mountable to left and right rails  320 ,  322  (see  FIG.  28   ) that are attached to interior surfaces  306 ,  308  of the left and right side walls  28 ,  30  of the truck bed. The trunk  300  comprises the tonneau cover  302  and the trunk  304 . To reconfigure the trunk  300 , the user may traverse the trunk  304  to the front position shown in  FIG.  28    or to the back position shown in  FIGS.  30  and  31   . To do so, the trunk  304  rides on the left and right rails  320 ,  322 . The trunk  304  may have left and right male members that engage the left and right rails  320 ,  322 . In  FIG.  32   , only the passenger side male member  324  is shown to mates with the left rail  320 . However, the driver side also has a driver side male member that slideably mates with the right rail  322 . To access the trunk  304 , the user may lift the tonneau cover  302  to the up position shown in  FIG.  28   . To close the trunk, the user closes the tonneau cover  302  as shown in  FIG.  27   . In either of the front and back positions, a partition  310  may be placed against a front wall  312  of the trunk  304  as shown in  FIG.  28   . The front wall  312  is covered by the partition  310  and cannot be seen in  FIG.  28    but is visible in  FIGS.  29 ,  30  and  31   . The partition  310  may also be placed in the middle of the trunk  304  (see  FIG.  29   ) as well as at a back side of the trunk  304  as shown in  FIG.  31   . 
     The partition  310  may be secured to the front middle or back side of the trunk  304  by way of grooves  314  formed by feet  316  wherein the groove  314  is defined by the feet  316 . The feet  316  may be placed at various positions along the panels of the trunk  304 . The feet  316  may be placed on both the left and right sides of the trunk  304  so that the grooves  314  formed by the feet  316  can support the left and right sides of the partition  312 . The partition  312  may be inserted into the grooves  314  from the top side of the feet. To reposition the partition  310 , the user lifts the partition  310  out of one set of grooves/feet  316  and drops the partition  310  into another set of grooves/feet  316 . By doing so, the size of the enclosure defined by the trunk  304 , partition  310  and the tonneau cover  302  is enlarged or reduced as desired by the user. The partition  310  is held vertically in place at the front and back of the trunk  304  with the aid of the feet  316  and the front wall  312  or the back lip. 
     The left and right sections  348 ,  350  may be identical but mirror images of each other and have a step  352 ,  354  that accommodates the left and right wheel wells  56 ,  58  of the truck bed so that the trunk  304  may be easily traversed between the front and back positions without having to vertically lift the trunk  10  over the wheel wells  56 ,  58  of the truck bed  16 . The bottom panel  346  may be disposed close to but not in contact with a floor  60  of the truck bed  16  so that the trunk may easily slide in the horizontal direction. The steps  352 ,  354  may be positioned above the highest point  62  of the wheel wells  56 ,  58 . The highest point of the wheel wells  58  is not shown but is identical to the highest point  62  (see  FIGS.  2 A ) of the wheel well  56 . 
     The trunk  304  may be horizontally slidable and mounted to the left and right side walls  28 ,  30  of the truck bed. In particular left and right rails  320 ,  322  may be fixedly secured to interior surfaces  306 ,  308  of the left and right side walls  28 ,  30  of the truck bed  16 . Preferably, the left and right side rails  320 ,  322  are positioned parallel and level with the floor  60  of the truck bed. In order to secure the left and right rails  320 ,  322  to the interior surfaces  304 ,  306  of the left and right side walls  28 ,  30  of the truck bed  16 , the left and right rails  320 ,  322  may be bolted to the interior surfaces  306 ,  308  of the left and right side walls  28 ,  30 . Alternatively, the left and right rails  320 ,  322  may have enlarged nubs that fit within keyhole shaped slots formed in the interior surfaces  306 ,  308  of the left and right side walls  28 ,  30 . The left and right sections may have tongues  324  that fit within the grooves  326  of the left and right rails  320 ,  322 . Preferably the tongues  324  and the grooves of the rails  320 ,  322  may have a wedge shaped configuration (see  FIG.  32   ) that slidably mates with each other. In order to dispose the tongues  324  into the grooves  326  of the left and right rails  320 ,  322 , the rails  320 ,  322  may be mounted to the left and right side walls of the truck bed. With the tailgate open, the trunk  304  is inserted into the truck bed from the rear of the truck bed so that tongues  324  can slide into the grooves  326  of the left and right rails  320 ,  322 . 
     Moreover, the grooves  326  may optionally have ball bearings that help to support the trunk  304  and to allow convenient and easy horizontal traversal of the trunk  304  between the back and front positions on the rails  320 ,  322 . 
     The left and right sections  348 ,  350  may have cross-sectional configuration that conforms to a cross-sectional inner profile of the left and right side walls  28 ,  30  including its wheel wells  56 ,  58 . In this regard, the left and right sections  348 ,  350  may be close to but not in contact with the left and right side walls  28 ,  30  and the wheel wells  56 ,  58  of the truck bed to allow for horizontal traversal of the trunk  304  between the front and back positions without vertically lifting or traversal of the trunk. 
     The trunk may be secured in the front and back positions by way of a set screw. When the trunk is in the back position the set screws are engaged in the holes. The set screw is pushed down and frictionally engages the tongues to prevent movement of the truck. When the trunk is in the front position, the set screws are engaged in the holes. The set screws push down and frictionally engage tongues of the trunk  304  to prevent horizontal movement of the trunk  304 . Alternatively or additionally, a detent may be incorporated into the trunk  304  and the rails  320 ,  322 . The detent may be operative to lock the trunk  304  in either the back position or the front position. 
     The trunk  300  was described as having the tongues  324  mounted to the trunk  304  and mating left and right rails  320 ,  322  having grooves  326 . However, it is also contemplated that the reverse configuration may be implemented. In particular, the grooves  326  may be formed in the members  324  that are attached to the trunk  304  and the left and right rails  320 ,  322  may have tongues that are received into the grooves formed in the members  324 . 
     To install the trunk  304  to the truck bed  16 , the left and right rails  320 ,  322  may be attached to the left and right side walls  28 ,  30  of the truck bed  16 . As discussed above, there are at least two methods of attaching or fixedly securing the left and right rails  320 ,  322  to the side walls  28 ,  30 . In particular, the keyhole shaped slots may be formed in the interior surfaces  306 ,  308  of the truck bed  16 . These keyhole shaped slots receive nubs of the left and right rails  320 ,  322 . The nubs are inserted into keyhole shaped slot and secured thereto in order to fix the left and right rails  320 ,  322 . Alternatively, the left and right rails  320 ,  322  may be bolted to the interior surfaces  306 ,  308  of the left and right side walls  28 ,  30 . The left and right rails  320 ,  322  may have grooves  326 . These grooves  326  may be directed inwardly toward the center of the bed of the truck. These grooves may run the entire length or a substantial portion of the length of the truck bed so that the truck trunk  304  may be traversed horizontally between front and back positions without having to lift the trunk  304  vertically. As shown and described, the groove formed on the left and right rails  320 ,  322  receive the tongues of the trunk  304 . 
     Before tightening the left and right rails  320 ,  322  to the interior surfaces  306 ,  308  of the left and right side walls  28 ,  30 , the left and right rails  320 ,  322  may be slightly loose so as to be capable of rattling. In this state, the tongues  324  of the trunk  304  may be inserted into respective grooves of the left and right rails  320 ,  322 . With the tongues disposed within the grooves, the left and right rails  320 ,  322  may now be adjusted and tightened onto the interior surfaces  306 ,  308  of the left and right side walls  28 ,  30 . 
     The tongues may be linearly traversable within the grooves to allow the trunk  304  to be horizontally traversable between front and back positions. By being horizontally traversable, a person that may not be that strong may easily move the trunk between the front and back positions depending on the desired use of the trunk  304 . If the trunk is in the back position, then the user may use the trunk  304  as a normal place to carry groceries. If the trunk  304  is in the front position, then the user may use the trunk  304  similar to a toolbox. In this fourth embodiment, the top of the trunk  304  is covered by way of the tonneau cover  302 . The tonneau cover  302  extends the full length of the truck bed so that regardless of the position of the trunk  304 , the top of the trunk  304  covers the trunk  304  when the tonneau cover  302  is in the down position. 
     In operation, the trunk  304  is locked either to the back position or the front position. If the user wants to segregate a portion of the truck bed into a smaller area to form a trunk  300 , the user lifts the partition  310  and either disposes the partition in the middle or in the back side of the trunk  304  by engaging the partition  310  into the respective grooves. To close the trunk  300 , the user traverses the tonneau cover  302  to the down position. To access the trunk  300 , the user traverses the tonneau cover  302  to the up position. In this regard, the trunk  300  is versatile in that it utilizes existing tonneau covers  302 . 
     The tonneau cover  302  may be a tonneau cover sold in the market currently or developed in the future. The trunk  304  is disposed below the tonneau cover  302  so that the trunk  304  operates in conjunction with tonneau covers  302  sold in the marketplace currently. The tonneau cover  302  shown in the drawings is one where the cover  302  is pivoted up and down at a hinge located adjacent to the cab of the truck. In the down position, the cover  302  closes the bed area of the truck and also closes off access to the truck trunk except through the tailgate when the partition  310  is in place. In the up position, the truck trunk is accessible through the top of the bed area. The tonneau cover  302  shown in the drawings are shown as being disposed above the left and right sidewalls of the truck bed. However, other types of tonneau covers  302  are also contemplated and may be used in conjunction with the trunk  304 . By way of example and not limitation, the trunk  304  may be used in conjunction with ROLL COVERS sold by TRUCK COVERS USA of San Diego, Calif. or a BAKFLIP sold by AMAZING TRUCK ACCESSORIES LP of Conroe, Tex. In these alternative types of tonneau covers, the covers are flush or below the upper surfaces of the left and right sidewalls of the truck bed. 
     The tonneau cover  302 , partition  310  and the trunk  304  may be fabricated from a generally rigid material. By way of example and not limitation, any one of the tonneau cover  302 , partition  310  and the trunk  304  may be fabricated from steel, aluminum, plastic, fiberglass, rubber, carbon fiber, canvas, carpet or combinations thereof. This means that the tonneau cover  302 , partition  310  and the trunk  304  may be fabricated from the same material (e.g.,  302 ,  304 ,  310  may all be fabricated from carbon fiber) or different materials (e.g.,  302  may be fabricated from steel,  304  may be fabricated from carbon fiber,  310  may be fabricated from aluminum). 
     Referring now to  FIGS.  33 - 40   , various embodiments of a collapsible folding truck trunk are depicted, which may be specifically sized and structured to facilitate use of the collapsible folding truck trunk within an area of the vehicle including the wheel well, such as the bed of a pickup truck. The collapsible folding truck trunk may be designed to stretch over the wheel well or reside between the wheel well and the rear end of the vehicle. As such, whereas the wheel well has interfered with the deployment and use of conventional truck trunks, the collapsible folding truck trunk disclosed herein may be capable of being used in the area adjacent the wheel well so as to maximize storage on the vehicle. Furthermore, the collapsible folding truck trunk may also allow a user to store smaller items, such as groceries, and other personal items, therein to prevent such items from being tossed about the bed of the pickup truck during movement of the pickup truck. In addition, the ability of the trunk to be placed near the wheel well may allow the user to easily access the collapsible folding trunk from the rear end of the pickup truck. 
     Referring now to  FIG.  33   , the pickup truck  18  depicted therein includes passenger cabin  38 , i.e., “cab,” and truck bed  16 . The exemplary cab  38  includes a pair of driver&#39;s side doors and a pair of passenger&#39;s side doors opposite the driver&#39;s side doors. It is understood that while the exemplary cab  38  includes two rows of seating, and thus, two doors on each side of the cab  38 , it is contemplated that the pickup truck  18  may include a single row of seating, and thus, may include only one door on each side of the cab  38 . The cab  38  may include a rear wall  39  positioned behind the seating in the cab  38  and defining a rear end of the cab  38 . Many pickup trucks  18  include a window in the rear wall  39 , but it is also contemplated that the rear wall  39  may be formed without a window. 
     The truck bed  16  may be positioned to the rear of the cab  38  and may include a forward wall  41  (see  FIG.  35   ), the pair of side walls  28 ,  30  and tailgate  36  extending between the pair of side walls  28 ,  30  and pivotally coupled to a truck bed floor  23  (see  FIG.  34   ). The truck bed  16  defines a storage area of the pickup truck  18 , wherein the driver may place items for transport. The truck bed floor  23  may be formed with ribs to enhance the strength thereof. The truck bed floor  23  includes a rear end  25  opposite the cab  38  and adjacent the tailgate  36 . The tailgate  36  may be transitional between a raised position (see  FIG.  33   ), wherein the tailgate  36  may be generally perpendicular to the truck bed floor  23  to retain items in the truck bed  16 , and a lowered position (see  FIGS.  34 - 40   ), wherein the tailgate  36  may generally form a continuation of the truck bed floor  23  to facilitate removal of items from the truck bed  16 . It is understood that instead of a tailgate  36 , some pickup trucks  10  may include a net or other element extending between the pair of side walls  28 ,  30  adjacent the rear of the truck bed  16  to prevent items from sliding off the truck bed  16  as the pickup truck  18  moves. 
     The pickup truck  18  additionally includes a pair of front wheels  27 , a pair of rear wheels  29 , and a pair of wheel wells  31  (see  FIG.  34   ) formed therein to accommodate the pair of rear wheels  29 . In this regard, the wheel wells  31  include the portion of the truck bed  16  that extends over the rear wheels  29 . The wheel wells  31  may be spaced from the rear end  25  of the truck bed floor  23  by a distance D. In many instances, each wheel well  31  may include a protruding portion that extends above the truck bed floor  23  between the side walls  28 ,  30  of the truck bed  16 . The protruding portion in the exemplary embodiment includes an arcuate body. 
     As shown in  FIG.  32   , a tonneau cover  432  may extend over the truck bed  16  to enclose the storage area defined by the truck bed  16 . The tonneau cover  432  may be selectively transitional between an extended configuration (see  FIG.  33   ) and a collapsed configuration (see  FIGS.  34 - 40   ). In the extended configuration, the tonneau cover  432  may extend over the truck bed  16  in one direction from the tailgate  36  to the forward wall  41 , and in another direction between the pair of side walls  28 ,  30 . As the tonneau cover  432  moves from the extended configuration toward the collapsed configuration, the degree by which the tonneau cover  432  extends over the truck bed  16  may decrease, and vice versa. The tonneau cover  432  may be folded or rolled onto itself to assume the collapsed configuration. In the exemplary embodiment, the tonneau cover  432  is formed of three panels  434  or regions pivotally coupled to each other to facilitate selective transition of the tonneau cover  432  between the extended configuration and the collapsed configuration. The three panels  434  may be folded onto each other, and moved toward the cab  38  to assume the collapsed configuration and to uncover the truck bed  16 . 
     Referring now specifically to  FIG.  34   , one embodiment of a collapsible folding truck trunk  436  is shown in a collapsed configuration and is stored against the forward wall  41  of the truck bed  16 . In the collapsed configuration, the collapsible folding truck trunk  436  may be folded so as to be sized to fit within the truck bed  16  and may be capable of having a form factor which does not protrude above an upper surface  43  the truck bed  16  so as not to interfere with the tonneau cover  432  when the tonneau cover  432  is in the extended configuration. In one implementation, when the collapsible folding truck trunk  436  is in the collapsed configuration, the periphery of the collapsible folding truck trunk  436  may be slightly smaller than the forward wall  41  of the truck bed  16 . As will be described in more detail below, the collapsible folding truck trunk  436  may be transitional from the collapsed configured to a deployed configuration for use in storing items within the truck bed  16 . As used herein, the term “collapse” may refer broadly to the ability to transition from a deployed, enlarged configuration, to a stowed, smaller configuration. Thus, with regard to the collapsible folding truck trunk  436 , it is contemplated that the trunk  436  may be “collapsed” via folding, bunching, rolling, deflating, bending, or other techniques known in the art which allow the trunk to occupy a smaller volume. 
       FIGS.  34  and  35    show the collapsible folding truck trunk  436  in the collapsed configuration, while  FIG.  36    shows the collapsible folding truck trunk  436  in an intermediate configuration between the collapsed configuration and the deployed configuration, and  FIGS.  37  and  38    show the collapsible folding truck trunk  436  in the deployed configuration. 
     The collapsible folding truck trunk  436  may include a base wall  440  (see  FIGS.  37  and  38   ) and a side wall  442  (see  FIGS.  37  and  38   ) pivotally connected to the base wall  440 . The base wall  440  may be sized and structured so as to extend over the floor  23  of the truck bed  16  when the collapsible folding truck trunk  436  is in the deployed configuration. The base wall  440  may be comprised of a plurality of base panels  444  pivotally connected to each other. In the exemplary embodiment, the base wall  440  includes a pair of base panels  444  separated by a pivot fold  446 , wherein each of the base panels  444  is of a quadrangular configuration. However, it is contemplated that the shape and number of base panels  444  may vary without departing from the spirit and scope of the present disclosure. For instance, the base wall  440  may be circular, and include semi-circular base panels. Each base panel  444  may be comprised of a rigid insert surrounded by a fabric cover, such as a cardboard, plastic, or rubber insert surrounded by a nylon fabric cover, plastic sheet or rubber sheet. Other materials may be used for the insert and/or the cover without departing from the spirit and scope of the present disclosure. 
     The base wall  440  may interface with the floor  23  of the truck bed  16  when the trunk  436  is in the deployed configuration, and thus, at least one surface of the base wall  440  may include a gripping material, such as rubber, along an external surface thereof. The gripping material may inhibit sliding of the trunk  436  during movement of the truck  18 . 
     The side wall  442  may extend from the base wall  440  and terminates at an upper edge  448 . The side wall  442  and base wall  440  may collectively define a storage cavity  450 . The side wall  442  may be comprised of plurality of side wall panels. The exemplary truck trunk  436  includes a first side wall panel  452  extending along a longitudinal edge of the base wall  440 , second and third side wall panels  454 ,  456  extending in opposed relation to each other and from opposed ends of the first side wall panel  452 , and a fourth side wall panel  458  in opposed relation to the first side wall panel  452 . The side wall panels  452 ,  454 ,  456 ,  458  may collectively define the side wall  442 , which extends around at least a portion of the base wall  440 . Although the exemplary embodiment includes four side wall panels, it is contemplated that the side wall  442  may be comprised of a single, continuous side wall panel. One or more of the side wall panels  452 ,  454 ,  456 ,  458  may have a pocket panel coupled thereto to form a pocket for storage of smaller items, such as keys, or other small, personal items. 
     As shown in  FIGS.  37  and  38   , the fourth side wall panel  458  may include a cutout  460  extending from the upper edge  448  and toward the base wall  440 . The cutout  460  may be sized and structured to facilitate insertion of items into the storage cavity  450 , and removal of items from the storage cavity  450 , particularly when the tailgate  36  is lowered. Although the exemplary embodiment includes a trunk  436  having a fourth side wall panel  458  having a cutout  460  formed therein, it is contemplated that the fourth side wall panel  458  may be absent in other embodiments of the trunk  436 , in which case the trunk  436  includes an opening opposite the first side wall panel  452  which is effectively the same size as the first side wall panel  452 . 
     The collapsible folding truck trunk  436  may be selectively transitional between the collapsed configuration and the deployed configuration. In the collapsed configuration, the plurality of base panels  444  may overlap each other, such that the base panels  444  are pivoted onto each other so as to define a common footprint. Moreover, in the collapsed configuration, the side wall panels  452 ,  454 ,  456  may be folded or bunched together to assume a minimal size. When the collapsible folding truck trunk  436  is in the collapsed configuration, the trunk  436  may assume a generally planar configuration, to facilitate placement of the collapsed trunk  436  against the forward wall  41  of the truck bed  16 , or alternatively, for placement within the cab  38 , such as behind a row of passenger seating, as is shown in  FIG.  40   . 
     In the deployed configuration, the plurality of base panels  444  may be co-planar to each other, such that the base panels  444  are in a side-by-side arrangement, with the pivot fold  46  residing between the base panels  444 . Furthermore, in the deployed configuration, the side wall panels  452 ,  454 ,  456 ,  458  may assume respective, generally planar configurations, with the upper edge  448  of the side wall  442  being spaced from the base wall  440 . Along these lines, as the collapsible folding truck trunk  436  moves from the collapsed configuration toward the deployed configuration, the upper edge  448  of the side wall  442  may move away from the base wall  440 . Adjacent side wall panels  452 ,  454 ,  456 ,  458  may be separated by a crease or fold line. Conversely, as the collapsible folding truck trunk  436  moves from the deployed configuration toward the stowed configuration, the upper edge  448  may move toward the base wall  440 . 
     To transition the collapsible folding truck trunk  436  from the deployed configuration toward the collapsed configuration, the side panels  452 ,  454 ,  456 ,  458  may be folded over the base wall  440 , which may result in bunching or folding of the side panels  452 ,  454 ,  456 ,  458 . For instance, the side wall panels  452 ,  454 ,  456  may be folded into a generally triangular configuration as they are folded onto the base wall  440 . Once the side panels  452 ,  454 ,  456 ,  458  are folded onto the base wall  440 , the base wall panels  444  may be folded on to each other, with the side panels  452 ,  454 ,  456 ,  458  being captured between the base wall panels  444 . The collapsible folding truck trunk  436  may include a latch or other locking mechanism for retaining the collapsible folding truck trunk  436  in the collapsed configuration. 
     The collapsible folding truck trunk  436  may include one or more handles  455  connected to respective portions of the side wall  442  to facilitate lifting and carrying of the trunk  436 , particularly when the trunk  436  is in the deployed configuration. The handles  455  may be fabricated from woven nylon, plastic, rubber, or other materials known in the art. The trunk  436  may include at least one pair of handles  455  in opposed relation to each other, i.e., connected to opposing side wall panels. 
     The collapsible folding truck trunk  436  may optionally include a divider  462  for dividing the storage cavity  450  when the trunk  436  is in the deployed configuration. In the exemplary embodiment, the divider  462  may include a divider wall  464  and an attachment element  466  coupled to the divider wall  464 . The attachment element  466  may be selectively engageable with the base wall  440  to allow the divider wall  464  to extend upwardly from the base wall  440  to divide the storage cavity  450  into two discrete regions. According to one embodiment, the attachment element  466  includes hook and loop fasteners (i.e., VELCRO™) which may be attachable to a corresponding strip  468  of hook and loop fasteners extending along the base wall  440  and side wall  442 . The attachment element  466  may extend along one or more vertical edges of the divider wall  464  to facilitate connection between the divider wall  464  and the side wall  442 . The strip  468  formed on the base wall  440  and side wall  442  may be wide enough to allow for selective positioning of the divider  462  within the trunk  436 . In this regard, the divider  462  may be moved closer to the side wall panel  52 , or alternatively, moved away from the side wall panel  452 , based on the desire of the user. 
     It is contemplated that the divider  462  may not only divide the storage compartment into several smaller sub-compartments, the divider  462  may enhance the overall rigidity of the trunk  436  by providing a brace or support to opposed side wall panels. 
     The divider wall  464  may include sufficient internal rigidity to independently extend upwardly from the base wall  440  when the attachment element  466  is attached to the base wall  60 . For instance, the divider wall  464  may include a rigid body, such as a sheet of plastic, cardboard, rubber, or the like. Alternatively, the divider wall  464  may lack internal rigidity, yet still be capable of extending upwardly from the base wall  440  via selective attachment to the side wall  442 . 
     The divider  462  depicted in  FIGS.  37 - 39    includes a single divider wall that extends longitudinally through the storage cavity  450  approximately halfway between the side wall panels  452 ,  458  to divide the storage cavity  450  into a pair of approximately equal regions. However, it is contemplated that the divider  462  may include more than one divider wall, so as to divide the storage cavity into more than two regions. For instance, the divider may include a pair of intersecting divider walls that segregate the storage cavity  450  into four regions. Furthermore, it is contemplated that the divider may be arranged to extend transversely across the storage cavity  450 , between side wall panels  454 ,  456 . 
     The divider  462  may be capable of assuming a generally planar configuration, to facilitate storage of the divider  462  when the collapsible folding truck trunk  436  is in the collapsed configuration. For instance, the divider  462  may be placed between the pair of base panels  444  when the collapsible folding truck trunk  436  is in the collapsed configuration. 
     As noted above, the collapsible folding truck trunk  436  may be specifically sized and structured to accommodate the protruding configuration of the wheel well  31 . In the embodiment depicted in  FIG.  38   , the collapsible folding truck trunk  436  may include an expandable portion  470  which conforms to the physical contour of the wheel well  31  as it is placed over the wheel well  31 . The expandable portion  470  may be comprised of a resilient, stretchable element, such as an elastic sheet formed of a stretchable fabric known in the art. Exemplary materials may include lycra, neoprene, rubber, as well as other resiliently stretchable materials. 
     The expandable portion  470  may form part of the base wall  440  and the side wall  442 . In this regard, it is understood that the remaining portions of the base wall  440  and the side wall  442  may generally be non-expandable or rigid. More specifically, the non-expandable portion of the base wall  440  may include an edge  472  that is of a configuration which mimics the outer contour of the wheel well  31 . Likewise, the non-expandable portion of the side wall  442  may include an edge  474  that mimics the outer contour of the wheel well  31 . As such, whereas the non-expandable portions of the base wall  440  and side wall  442  may be configured to extend around the periphery of the wheel well  31 , the expandable portion  470  may be designed to extend over the wheel well  31  when the collapsible folding truck trunk  436  is positioned in the truck bed  16 , with the side wall panel  452  extending between the wheel wells  31  (e.g., within a plane that intersects the wheel wells  31 ). The edges  472 ,  474  may be sized to extend around the wheel well  31  in close proximity to the wheel well  31  or spaced away from the wheel well  31 . 
     One embodiment of the trunk  436  may include a pair of expandable portions  470  intended to interface with a respective wheel well  31 . In other words, as the deployed trunk  436  is placed in the truck bed  16  adjacent the wheel wells  31 , each expandable portion  470  may expand over one of the wheel wells  31  to engage with the wheel wells  31 . The ability of the trunk  436  to engage with the wheel wells  31  in a cooperatively engageable manner may not only enhance the ability to store items near the rear of the pickup truck  18 , such engagement may also help to prevent movement of the trunk  436  within the truck bed  16  during movement of the pickup truck  18 . 
     According to one implementation, each expandable portion  470  may extend in one direction from the respective side panel  454 ,  456  by an amount in the range of 8-24 inches, and in another direction from the base wall  440  by an amount in the range of 8-24 inches. In this regard, the size of the expandable portion  470  may be varied to accommodate wheel wells  31  that vary in dimension. However, it is also contemplated that the trunk  436  may be useable with different truck beds  14 , with the expandable portion  470  providing an ability to universally fit different sized wheel wells  14 . 
     The ability of the expandable portion  470  to expand over the wheel well  31  as the trunk  436  is placed in its desired position may be attributable to the elastic nature of the expandable portion  470 . Thus, as the expandable portion  470  is placed over the wheel well  31  and expands, an internal tension within the expandable portion  470  may increase. Such tension may bias the trunk  436  out of position on the truck bed  16 . However, the trunk  436  may be of sufficient weight to overcome such biasing force and maintain the trunk  436  in the desired position. 
     According to another embodiment, the expandable portion  470  may be fabricated from a non-elastic, yet expandable structure, such as a piece of preformed fabric, which is capable of being deployed over the wheel well  31 . In this regard, the term “preformed” refers to the size and shape of the fabric as being similar to at least a portion of the wheel well  31  to allow the expandable portion  470  to extend over the wheel well  31  as the expandable portion  470  is placed over the wheel well  31 . In this regard, the preformed fabric may be capable of extending over the wheel well  31  without increasing the tension within the preformed fabric. 
     While the collapsible folding truck trunk  436  depicted in  FIG.  38    may be specifically designed to accommodate the wheel well  31  by including the expandable portion  470  to extend around the wheel well  31 , it is contemplated that other embodiments may accommodate the wheel well  31  through other structural features. One such embodiment is depicted in  FIG.  39   , which includes a collapsible folding truck trunk  536  which may be formed without an expandable portion, yet may still allow the truck trunk  536  to be used without interference from the wheel well  31 . In particular, the collapsible folding truck trunk  536  is designed to be sized and dimensioned to reside in the space between the wheel well  31  and the rear end  25  of the truck bed floor  23 . 
     The collapsible folding truck trunk  536  is similar to the collapsible folding truck trunk  436  described above, except for the differences discussed below. Thus, the following discussion of the truck trunk  536  will be focused on the unique attributes of the collapsible folding truck trunk  536  relative to the truck trunk  436 . 
     The collapsible folding truck trunk  536  may include a base wall  140  and a side wall  142  including side panels  552 ,  554 ,  556 ,  558 . The collapsible folding truck trunk  536  may include a depth “d” defined as the distance between the side panels  552 ,  558 , or in the case of a trunk  536  which does not include a side panel  558 , the distance between the opposed lateral edges of the base wall  540 . The collapsible folding truck trunk  536  may be sized and dimensioned such that the depth “d” of the collapsible folding truck trunk  536  is slightly less than or equal to the distance D between the wheel well  31  and the rear end  25  of the truck bed floor  23 . The side panel  552  may abut against the wheel wells  31 , which may prevent the trunk  536  from sliding toward the cab  38  during movement of the truck  18 . In other words, in the deployed position, the collapsible folding truck trunk  536  may be positioned relative to the wheel well  31  such that the side panel  552  extends in a plane that does not intersect the wheel well  31 , or that forms a tangent to the wheel well  31 . 
     Therefore, when the collapsible folding truck trunk  536  is deployed, a user may place the collapsible folding truck trunk  536  within the truck bed  16  between the space between the wheel well  31  and the rear end  25  of the truck bed floor  23 . As such, the wheel well  31  does not interfere with the collapsible folding truck trunk  536 , and thus, the collapsible folding truck trunk  536  is capable of residing on the truck bed floor  23  with the base wall  140  being substantially parallel to the plane defined by the truck bed floor  23 . 
     The collapsible folding truck trunk  436 ,  536  may include a cover  560  for enclosing items stored therein. The cover  560  may be engageable with the side wall  442 ,  542  to extend over the storage cavity. The cover  560  may be engageable with the side wall  442 ,  542  via a zipper, snaps, hook and loop fasteners (i.e., VELCRO™), etc. The cover  560  may include an upper panel  562  and/or a side panel  564 . For instance, both the upper panel  562 ,  564  may be included to completely cover the openings of the truck trunk  436 ,  536 . Alternatively, the cover  560  may include only the upper panel  562 , thereby leaving a vertical opening in the trunk  436 ,  536 . The vertical opening may be aligned with the tailgate  36  when the tailgate is in the raised position to cover the vertical opening. Furthermore, the vertical opening may be exposed or uncovered to provide access to the interior of the trunk when the tailgate  36  is in the lowered position. Alternatively, the cover  560  may only include the side panel  564 , thereby leaving the upper portion of the trunk  436 ,  536  exposed. 
     It is contemplated that the truck trunk  436 ,  536 , and the cover  560  may be formed from a waterproof material (e.g., plastic) or have a waterproof coating applied thereto to protect items contained therein from water damage, particularly when the trunk  436 ,  536  is used in the bed  16  of a pickup truck  18 , and exposed to the natural elements. 
     Although the figures show various embodiments of a collapsible folding truck trunk used in the bed of a pickup truck, it is understood that the scope of the present disclosure is not limited thereto. For instance, it is contemplated that other versions of a collapsible folding trunk may be used in a sedan, station wagon, sport utility vehicle (SUV), hatchbacks, or other vehicles known in the art. Moreover, it is contemplated that various embodiments of the collapsible trunk may be used to accommodate not only wheel wells, but other structural features protruding into the storage space of a vehicle. Furthermore, the term “trunk” is used broadly herein to encompass any container for storing items. 
     Referring now to the drawings, a trunk  1130  for a bed  1110  of truck  1100  is shown in  FIGS.  41 - 51   . Trunk  1130  provides an isolated space within the bed  1110  of the truck  1110  in that the walls  1182 ,  1184 ,  1186 , floor  1188 , top cover  1132 , and front cover  1134  provide a barrier from surfaces of the bed  1110  of the truck  1100  so that objects (e.g. a toolbox, tools) may be placed in the trunk  1130  and protected from potential dirt on the surfaces of the bed  1110  of the truck  1100 . Trunk  1130  has three compartments: a central compartment  1152 , a left compartment  1182 , and a right compartment  1186  within which storage items, such as storage items  1160 ,  1162 , and  1164 , can be placed in various compartments of trunk  1130 . While left compartment  1154  and right compartment  1156  can be accessed by opening top cover  1132 , central compartment  1152  can be accessed either by opening top cover  1132  or by opening front cover  1134 . 
     Trunk  1130  may be positioned in any position along a length of truck bed  1110 , such as a front bed position shown in  FIGS.  41 ,  42 , and  51   , a front tailgate position shown in  FIGS.  43 - 48   , a rear bed position shown in  FIGS.  49  and  50   . The front bed position in  FIGS.  41 ,  42 , and  51    allows a user to access items in trunk  1130  when the tailgate  1120  is closed, the front tailgate position in  FIGS.  43 - 48    allows a user to easily access items in trunk  1130  when the tailgate  1120  is open, and the rear bed position in  FIGS.  49  and  50    allows a user to maximize space in truck bed  1110 , both when the trunk top cover  1132  and front cover  1134  are closed, as shown in  FIG.  49   , and when the trunk top cover  1132  and front cover  1134  are open, as shown in  FIG.  50   . Left compartment  1154  has a height  1155  and right compartment  1156  has a height  1157  that are both less than the height  1153  of central compartment  1152 . This allows trunk  1130  to be positioned in the rear bed position in  FIGS.  49  and  50    while accommodating the extra space that wheel wells  1122  and  1124  take within bed  1110 . The trunk  1130  may be easily moved between positions along the length of truck bed  1110  so that great strength is not required to reconfigure the position of the trunk  1130  within the truck bed  1110 . Weaker people may reconfigure the trunk  1130  between the positions without assistance or help from another person. Preferably, a lock, such as locks  1172  and  1174 , may be used to lock trunk  1130  in position within a position and prevent trunk  1130  from sliding when trunk  1100  is on the move, or is parked on a slope. 
     An inventive truck trunk may be configured to traverse the length of a truck bed in any suitable manner. For example, while a trunk  1130  for a bed  1110  of truck  1100  is shown in  FIGS.  1 - 11   , a trunk  1230  for a bed  1210  of truck  1200  is shown in  FIGS.  52 - 54   , a trunk  1330  for a bed  1310  of truck  1300  is shown in  FIGS.  55 - 56   , and a trunk  1430  for a bed  1410  of truck  1400  is shown in  FIG.  57   . The trunk  1130  in  FIGS.  1 - 11    traverses along a length of truck bed  1110  via rails  1115  and  1117  along sidewalls  1114  and  1116  of bed  1110 , the trunk  1230  in  FIGS.  52 - 54    traverses along a length of truck bed  1210  via rails  1215  and  1217  along sidewalls  1214  and  1216  of bed  1210 , the trunk  1330  in  FIGS.  55 - 56    traverses along a length of truck bed  1310  via wheels  1322  and  1324  that roll along recessed tracks  1332 ,  1342  and recessed tracks  1334 ,  1344 , respectively, and the trunk  1430  in  FIG.  57    traverses along a length of truck bed  1410  via truck bed rail  1419  and tailgate rail  1422 . 
     Referring now more particularly to  FIGS.  41 - 51   , truck  1100  has a truck bed  1110  having a cabin wall  1112 , a driver side sidewall  1114 , a passenger side sidewall  1116 , a tailgate  1120 , and a trunk  1130 . The trunk  1130  is movable along a length of truck bed  1110  by sliding along driver side rail  1115  and passenger side rail  1117 . Trunk  1130  has a side surface  1142  configured to engage with driver siderail  1115  and a side surface  1144  configured to engage with passenger siderail  1117 . Driver siderail  1115  has a brake  1143  and passenger siderail  1117  has brake  1145  that prevent trunk  1130  from disengaging from the siderails to slide out of truck bed  1110  if trunk  1130  is pulled too far. Brakes  1143  and  1145  are preferably configured to be disengage able by applying pressure orthogonally to the length of the siderails to allow a user to slide trunk  1130  out of truck bed  1110 . Driver siderail  1115  also has a locking mechanism  1172  and passenger siderail  1117  has a locking mechanism  1174  that act to prevent trunk  1130  from sliding to another position. For example, in  FIG.  49   , locking mechanisms  1172  and  1174  are shown as locking trunk  1130  in place while trunk  1130  is juxtaposed next to cabin wall  1112 . While locking mechanisms  1172  and  1174  are shown as pins that are inserted into recesses of driver siderail  1115  and passenger siderail  1117 , any suitable locking mechanisms could be used, for example rotating pinions or even zip ties, in alternative embodiments. 
     Trunk  1130  may be disposed in any position along a length of truck bed  1110 . For example in  FIG.  41   , truck  1130  is disposed in a front bed position with tailgate  1120  closed. In this configuration, a user could reach over an upper edge of tailgate  1120  to unlock lock  1136  (e.g. a rotating pinion lock) and open top cover  1132  of trunk  1130  to access any of cavities  1152 ,  1154 , and/or  1156  of trunk  1130 . A user could then open tailgate  1120  as shown in  FIG.  42    to access the front cover  1134  of trunk  1130  or the top cover  1132  of trunk  1130 . Once tailgate  1120  is open, a user could pull trunk  1130  further along siderails  1115  and  1117  such that at least a portion of trunk  1130  is positioned over tailgate  1120 , as shown in  FIG.  43   . In  FIG.  43   , the front edge of trunk  1130  extends past the ends of driver siderail  1115  and passenger siderail  1117  while still remaining engaged to the siderails. This way, a user need not bend over to reach into the truck trunk  1130 , as the access position is very easy to attain. The weight of trunk  1130  is supported by the upper surface  1124  of tailgate  1120 , and the front edge of trunk  1130  is shown as substantially aligned with the front edge of tailgate  1120 . In other embodiments, brakes  1143  and  1145  could be configured to ensure that the front edge of trunk  1130  stops just before the front edge of tailgate  1120 , or just after hanging over the edge of the front edge of tailgate  1120  (e.g. within an inch or two). 
     As shown in  FIG.  44   , the top cover  1132  could be opened by pivoting along pivot point  1131  on pneumatic arm  1133 . While top cover  1132  is shown as a door that pivots on a pivot point, any other suitable door could be used to cover an upper opening of trunk  1130 . With top cover  1132  open, a user could access any of center compartment  1152 , left compartment  1154 , and/or right compartment  1156 . Central compartment  1152  is defined by left wall  1182 , rear wall  1184 , and right wall  1186 , which form natural partitions of trunk  1130 . 
     As shown in  FIG.  45   , a user could also open front cover  1134 , which enters recess  1135   a  to be stored within storage area  1135   b  within the bottom  1188  of trunk  1130 . With both top cover  1132  and front cover  1134  open, a user could easily access central compartment  1152  from both the top and the front, allowing very large items, such as storage item  1160 , to be placed in central compartment  1152 . Smaller storage items, such as storage item  1162  and  1164  could be stored in the left and right compartments  1154  and  1156 , as shown in  FIG.  47   . 
     Once items have been stored in trunk  1130 , the top cover  1132  and front cover  1134  could be closed and lock  1136  could be engaged, and the trunk could be moved to a position away from the position above tailgate  1120 , and towards a position above the floor of trunk  1130 , such as the rear bed position shown in  FIG.  49   . Preferably, trunk  1130  is locked in place using locks  1172  and  1174 . Trunk  1130  can be moved to be juxtaposed to cabin wall  1112  because left compartment  1154  has a height  1155 , and right compartment  1156  has a height  1157 , that positions the bottom of each compartment over the wheel walls  1122  and  1124 , respectively. Contrasting the height  1155  of left compartment  1154  and the height  1157  of right compartment  1156  against the height  1153  of central compartment  1152  illustrates how space is maximized within trunk  1130  while still accommodating a trunk that can span the entire width of trunk bed  1110  and can be moved between the front bed position, the front tailgate position, and the rear bed positions. 
     As shown in  FIG.  50   , the top cover  1132  and front cover  1134  could be opened and the storage item  1160  removed to maximize the space used in truck bed  1110 . This way, the truck bed could be used to near maximum efficacy without removing the trunk  1130  from the truck  1100 . 
     Different truck bed covers could be used, as shown in  FIGS.  52 - 54   , where truck  1200  has truck bed cover  1250 , covering truck bed  1210  having cabin wall  1212 , driver sidewall  1214 , and passenger sidewall  1216 . Contemplated truck bed covers include flat cap tonneau covers, shells, roll-up tonneau covers, and fold-up tonneau covers. As shown, trunk  1230  slides along driver side rail  1215  and passenger side rail  1217  to slide over tailgate  1220  when open to be accessible in a front tailgate position. While top cover  1232  is similar to top cover  1132 , front cover  1234  is a rotational cover that folds out to pivot over a front edge of tailgate  1220  when tailgate  1220  is in the open position. This not only shows how other door configurations could be used to allow a user to access central cavity  1252 , but also shows how front cover  1234  could be used to hold and lock trunk  1230  in place until front cover  1234  is closed. 
     Alternative embodiments could be used to enable a trunk to slide and lock in place in different positions within a truck bed of a truck. For example, in  FIGS.  55 - 56   , a trunk  1330  has wheels  1322  and  1324  that roll within the truck bed recessed tracks  1332  and  1334 , respectively, and over tailgate recessed tracks  1342  and  1344 , respectively. Recessed track  1332  aligns with recessed track  1342  when tailgate  1320  is opened, and likewise recessed track  1334  aligns with recessed track  1344  when tailgate  1320  is opened. This allows a weight of the trunk  1330  to be transferred from the truck bed  1310  to the tailgate  1320  when trunk  1330  is moved from one position to another. While each wheel  1322  and  1324  could have their own brake and locking mechanism, trunk  1330  is preferably coupled to cable container  1350  via cable  1352 , which locks trunk  1330  in place relative to the truck bed  1310  via lock  1354 . When lock  1354  is engaged, cable  1352  is unable to extend and does not allow trunk  1330  to roll further distant from the truck cabin of truck  1300 . When lock  1354  is disengaged, cable  1352  is able to extend or retract into cable container  1350  so that trunk  1330  could be relocated. 
     In  FIG.  57   , an alternative truck  1400  has a truck bed rail  1419  and a tailgate rail  1422  which are engageable to trunk bottom rail  1432  of trunk  1430 . Truck bed rail  1419  is similar to siderails  1115  and  1117 , but does not have a brake, as trunk bottom rail  1432  is configured to also engage tailgate rail  1422 , which has a brake  1423  that prevents trunk  1430  from sliding off of an edge of tailgate  1420 . Additional rails could be used in alternative embodiments. 
     The above description is given by way of example, and not limitation. Given the above disclosure, one skilled in the art could devise variations that are within the scope and spirit of the invention disclosed herein, including various ways of locking the lid  34 . Further, the various features of the embodiments disclosed herein may be used alone, or in varying combinations with each other and are not intended to be limited to the specific combination described herein. Thus, the scope of the claims is not to be limited by the illustrated embodiments.