Abstract:
A suicide prevention door kit has a movable upper segment having a top surface and a mechanism. The movable upper segment is supported by the mechanism. The mechanism is configured to transition between a loaded state and a triggered state. The top surface is approximately horizontal in the loaded state and sloped in the triggered state. The suicide prevention door kit further comprises a switch in communication with the mechanism. The switch is configured to cause the mechanism to transition from the loaded state to the triggered state.

Description:
RELATED APPLICATIONS 
     This Application claims priority to prior U.S. Provisional Application having Ser. No. 61/314,777 filed Mar. 17, 2010 and titled “Collapsible Door Apparatus and Method Thereof,” of which is incorporated by reference herein. 
    
    
     FIELD 
     Various implementations of the present invention, and combinations thereof, are related to wall mounted kits adapted to reduce or eliminate the occurrence of suicides in certain scenarios. More particularly, the invention relates to a wall mounted kit in which the upper portion of the kit is configured to collapse under an applied force to form a sloped surface. Most particularly, the invention relates to a collapsible door configured to function as a traditional door, yet collapse under an applied load to form a sloped surface that allows the applied load to slide down and fall off the door. 
     BACKGROUND 
     Some facilities house patients at risk of committing suicide. These facilities include medical facilities, mental institutions, prisons, and detention centers. One common method of suicide is by hanging. In this method, an individual can utilize a physical support of sufficient height, such as the top surface of a door, to provide physical support. Doors, however, are necessary to provide privacy, solitude, isolation, and containment in such facilities. It is therefore desirable to provide a system to reduce or eliminate the occurrence of suicides in cases where a door is used as the physical support by an individual to hang himself, while at the same time maintaining the benefits provided by the door. 
     SUMMARY 
     The present system can be used in conjunction with or as a substitute for a typical door used in, for example, rooms, offices, bathroom stalls, or entryways. In one implementation of the present system, a collapsible door comprises a body formed to include a cavity and a blade attached to the body. The blade is configured to retract into the cavity. The collapsible door further comprises a mechanism disposed within the cavity. The mechanism is configured to transition the door between a loaded state and a triggered state. A top surface of the collapsible door is approximately horizontal in the loaded state and the top surface of the collapsible door is sloped in the triggered state to form an angle between about 6 degrees and about 45 degrees from the horizontal. The collapsible door further comprises a pressure sensor in contact with the blade, wherein the pressure sensor is configured to cause the mechanism to transition from the loaded state to the triggered state. 
     In one implementation, a collapsible door kit comprises a body formed to include a cavity and a mechanism disposed within the cavity. The mechanism is configured to transition between a loaded state and a triggered state. The top surface of the collapsible door kit is approximately horizontal in the loaded state and the top surface of the collapsible door kit is sloped in the triggered state. The collapsible door kit further comprises a blade disposed at least partially above the mechanism. The blade is supported by the mechanism. The collapsible door kit further comprises a pressure sensor in contact with the blade. The pressure sensor is configured to cause the mechanism to transition from the loaded state to the triggered state. 
     In one implementation, a collapsible structure comprises a movable upper segment having a top surface and a mechanism. The movable upper segment is supported by the mechanism. The mechanism is configured to transition between a loaded state and a triggered state. The top surface is between about 1 inch and about 3 inches wide and between about 20 inches and about 45 inches long. The top surface is approximately horizontal in the loaded state. The top surface is sloped in the triggered state. The collapsible structure further includes a switch in communication with the mechanism. The switch is configured to cause the mechanism to transition from the loaded state to the triggered state. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Implementations will become more apparent from the detailed description set forth below when taken in conjunction with the drawings, in which like elements bear like reference numerals. 
         FIGS. 1(   a )- 1 ( c ) are illustrations depicting the operation of an exemplary collapsible door. 
         FIG. 2  is a block diagram depicting the components of a exemplary collapsible door that is triggered by a downward force. 
         FIG. 3  is an illustration depicting the internal mechanism of one implementation of a collapsible door in the loaded position. 
         FIG. 4  is an illustration depicting the collapsible door of  FIG. 3  in the triggered or collapsed position. 
         FIG. 5  is an illustration depicting the procedure for reloading the collapsible door of  FIG. 4 . 
         FIG. 6  is an illustration depicting the internal mechanism of another implementation of a collapsible door that is triggered by a downward force and/or a lateral force. 
         FIG. 7  is an illustration depicting the collapsible door of  FIG. 6  in the triggered position. 
         FIG. 8  is an illustration depicting the procedure for reloading the collapsible door of  FIG. 7 . 
     
    
    
     DETAILED DESCRIPTION 
     The present system is described in various implementations in the following description with reference to the Figures, in which like numbers represent the same or similar elements. Reference throughout this specification to “one embodiment,” “an embodiment,” or similar language means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, appearances of the phrases “in one embodiment,” “in an embodiment,” and similar language throughout this specification may, but do not necessarily, all refer to the same embodiment. 
     The described features, structures, or characteristics of the present system may be combined in any suitable manner in one or more implementations. In the following description, numerous specific details are recited to provide a thorough understanding of the various implementation. The present system may be practiced without one or more of the specific details described, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention. 
       FIGS. 1(   a )- 1 ( c ) are illustrations depicting the operation of an exemplary collapsible door. Referring to  FIG. 1(   a ), a collapsible door  300  has a body  302 . The body  302  may be constructed from any material suitable for use in a door, including steel, aluminum, wood, or reinforced polyester. In one implementation, a full mortise continuous hinge  306  is attached to the body  302 . The hinge  306  is used to mount the collapsible door  310  to a door frame. In another implementation, two of more hinges, of any type suitable for mounting, may be used to mount the collapsible door  310  to a door frame. A handle  312  is mounted to the body  302 . 
     The top portion of the collapsible door  300  includes a collapsible section  304 . The collapsible section  304  may be composed of the same or different material as the body  302 . The collapsible section  304  is mounted on the body  302  by a mechanism (not shown). In one implementation, the mechanism is housed in a cavity within the body  302 . In one implementation, the mechanism is housed in a cavity within the collapsible section  304 . 
     The collapsible section  304  is configured to fall into the body  302  when the mechanism is triggered. In one implementation, the collapsible section  304  falls to the side of or around the body  302 . In some cases, the mechanism is triggered when sufficient force is applied to the collapsible section  304 . The force triggers a mechanism that allows the collapsible section  304  to drop. In some implementations, the force is detected by an electrical sensor or mechanism allowing the collapsible section  304  to drop. 
     In one implementation, the top surface of the body  302  is sloped. In another implementation, the top surface of the body  302  is horizontal. In different implementations, when the collapsible section  304  has dropped, a sloped surface is formed by the collapsible section  304 , a sloped surface is formed by the body  304 , or a sloped surface is formed by a combination of the body  302  and the collapsible section  304 . 
     Referring to  FIG. 1(   b ), a side view of the collapsible door  300  of  FIG. 1(   a ) is depicted. The body  302 , collapsible portion  304 , handle  312 , and door latch mechanism  314  can be seen in this view. In one implementation, the collapsible portion  304  is triggered to drop by a downward force  324 . In one implementation, the collapsible portion  304  is triggered to drop by a lateral force  320 . In one implementation, the collapsible portion  304  is triggered to drop by a lateral force  322 . In one implementation, the collapsible portion  304  is triggered to drop by a combination of a downward force  324  and a lateral force  320  or  322 . 
     Referring to  FIG. 1(   c ), the collapsible door  300  is shown after sufficient force has been applied to the collapsible section  304 , triggering the mechanism to cause the collapsible section  304  to drop into the body  302 . In one embodiment, the collapsible portion  304  retracts fully into the body  302 , exposing the sloped surface formed by the body  302  after being triggered. The body  302  forms a top surface with an angle  330  measured from the horizontal. The angle varies on the width of the door and the particular application. In one implementation, the angle  330  is about 30° from the horizontal. In different embodiments, the angle  330  may be between about 6° and about 45° from the horizontal. 
     In another embodiment, the collapsible portion  304  may retract partially within the body  302 . The exposed top surface of the collapsible portion  304  forms a sloped surface after the mechanism is triggered. 
     The force necessary to trigger the mechanism will be a force less than that to support the weight of an individual, but will be determined by the particular application. For example, the collapsible door installed in a juvenile detention center may be configured to respond to a lower force than a collapsible door installed at an adult detention facility. In one implementation, the downward force  324  to trigger the mechanism is about 5 lbs. In one implementation, the lateral force  320  or  322  to trigger the mechanism is about 5 lbs. In one implementation, the mechanism is triggered by deflecting the top of the collapsible portion  304  5° from the vertical relative to the body  302  of the collapsible door  300 . 
     Referring to  FIG. 2 , an illustration depicting the functional blocks of one implementation of a collapsible door is depicted. The collapsible door system  400  comprises a door body  402 . A break line  404  indicates that the lower portion of the door body  402  has been omitted from the drawing. The door body  402  contains an internal cavity  406 . A portion of the door body  402  extends over the internal cavity  406 . A break line  408  indicates that a portion of the door body  402  has been omitted from the drawing to expose the internal cavity  406 . The door body  402  also comprises a backplane  410  that extends behind the internal cavity  406 . The top of the door body  402  is represented by broken line  412 . 
     A drop mechanism  414  is mounted to backplane  410 . The drop mechanism  414  holds the drop segment  420  in the raised position by a support means  416 . The top of the drop segment  420  forms a horizontal surface when in the loaded state. 
     A pressure sensor  422  is in communication with drop segment  420  by a link  424 . The pressure sensor  422  is in communication with drop mechanism  414  by a link  426 . In one implementation, the pressure sensor is integrated into the support means  416 . 
     When the pressure sensor  422  detects, via the link  424 , a sufficient amount of pressure, the pressure sensor  422  activates the drop mechanism  414  through the link  426 . In one implementation, the pressure sensor  422  detects pressure that is exerted downward on the top of drop segment  420 . In one implementation, the pressure sensor  422  detects pressure that is exerted laterally on the top of drop segment  420 . In one implementation, the pressure sensor  422  detects pressure that is exerted both downward and laterally on the top of drop segment  420 . 
     Once activated, the drop mechanism  414  releases the support means  416 , thereby allowing the drop segment  420  to fall downward into the internal cavity  406 . Once the drop segment  420  comes to rest, the top of the drop segment  420  forms an angled (i.e., sloped) surface. 
     In another implementation, the pressure sensor  422  comprises an electromechanical pressure sensing device positioned along the top edge of drop segment  420 . Any pressure exerted downward on the top of the drop segment  420  is detected by the electromechanical pressure sensing device. Upon application of sufficient force, the electromechanical pressure sensing device sends a signal to drop mechanism  414 . The force necessary to trigger the mechanism will be a force less than that to support the weight of an individual, but will be determined by the particular application. For example, the collapsible door installed in a juvenile detention center may be configured to respond to a lower force than a collapsible door installed at an adult detention facility. 
     In yet another implementation, the pressure sensor  422  may be a positional sensor that detects the position of the drop segment  420 . When pressure exerted downward on the top of the drop segment  420  causes the drop segment  420  to move downward or laterally a sufficient amount, the positional sensor sends a signal to trigger drop mechanism  414 . 
     Referring to  FIG. 3 , an exemplary implementation illustrating a portion of a collapsible door  100  is depicted. The collapsible door  100  comprises a lower section  102 . The lower section  102  is constructed using the same materials and in the same configuration as a typical door. A break line  104  indicates that the remainder of the lower section  102  has been omitted from the drawing. 
     The collapsible door  100  also comprises a suicide prevention kit  106 . The suicide prevention kit  106  can be added to an existing door by removing the upper portion of an existing door and replacing the removed upper portion of an existing door with the suicide prevention kit  106 . In one implementation, the kit replaces about 17 inches of the upper portion of an existing door. Alternately, the suicide prevention kit  106  can be integrated into a new door during construction of the new door. 
     The suicide prevention kit  106  is attached to the lower section  102  of the collapsible door  100  by a mounting bracket  108 . A front panel  186  is mounted to the mounting bracket  108 . The front panel  186  encloses the entire front of the suicide prevention kit  106 . A break line  184  indicates that the remainder of the front panel  186  has been omitted from the drawing for clarity. A back panel  126  is attached to the mounting bracket  108 . The back panel  126  encloses the entire back of the suicide prevention kit  106 . The mounting bracket  108 , back panel  126 , and front panel  186  provide structural support for the different components of the suicide prevention kit  106 . A pivot mounting bracket  110  is attached to the mounting bracket  108 . A guide plate  112  is connected to the pivot mounting bracket  110  at pivot point  114 . Two rod guides  116  and  118  hold a trigger rod  120  in place. A tension spring  122  is attached to guide plate  112  at an attachment point  124  and to the back panel  126  (attachment point not shown). The tension spring  122  applies tension to the guide plate  112  around pivot point  114  in order to apply a biased force against trigger rod  120  through rod guides  116  and  118 . 
     The trigger rod  120  is connected to a drop segment  158  and to a trigger block  128 . The trigger block  128  has an angled lower portion, which forms a wedge. The wedged portion of trigger block  128  rests against trigger roller  130 . The trigger roller  130  is mounted on a plate  132  and fastened by two screws (shown but not numbered). A locking roller  134  is also attached to plate  132  by two screws (shown but not numbered). The locking roller rests against locking block  136 . The locking block  136  is attached to the back panel  126 . The top portion of locking block  136  is angled and the bottom portion of locking block  136  is squared. A slot  138  is cut into the plate  132 . The portion of the plate  132  to the right of the slot  138  is bent so the portion to the right is parallel to the left portion of the plate  132 , but closer to back panel  126 . The lower portion of the plate  132  to the right of the slot  138  is in contact with a locking spring (not shown) that is compressed above the plate  132  and under a trigger bracket  140 . The locking spring is attached to the trigger bracket  140  by screw  142 . The locking spring under screw  142  applies pressure to the plate  132  towards the back panel  126 . The locking spring functions to hold the locking roller  134  against the squared portion of locking block  136 . 
     The trigger bracket  140  is attached to pivot block  144  by four screws  146  (only one screw is labeled). A loading block (not shown) is attached to the leftmost portion of trigger bracket  140  by two screws (shown but not labeled). The loading block is for loading the suicide prevention assembly after it has been triggered. A tension spring  148  is attached to trigger bracket  140  at one end and is attached to support arm  150  at the other end. 
     The pivot block  144  is attached on the left side to plate  132 . The pivot block  144  is attached to the back panel  126  at a pivot point  152 . The support arm  150  is attached to pivot block  144  at a pivot point  154 . A roller  156  is attached to the opposite end of support arm  150 . 
     The drop segment  158  is supported by roller  156  and by trigger rod  120 . A stopper  160  may be attached to drop segment  158  to control the downward motion of drop segment  158 . The stopper  160  comes in contact with mounting bracket  108  and the drop segment  158  comes into contact with a pin  164  once the suicide prevention kit  106  is activated. A segment  162  is attached to the back panel  126 . The segment  162  covers the space along the edge of the suicide prevention kit  106 . 
     Application of sufficient force on the top portion of drop segment  158  will activate the suicide prevention kit  106 . Force applied downward on the top of drop segment  158  causes the drop segment to move downward. A small force will move the drop segment a small distance downward, causing the roller  156  to travel to the right along the bottom surface of drop segment  158 . As the roller  156  travels to the right along the bottom edge of the drop segment  158 , the support arm  150  pivots about pivot point  154 , thereby stretching tension spring  148 . 
     The pivot assembly comprises the trigger bracket  140 , the pivot block  144 , the plate  132 , the trigger roller  130 , the locking roller  134 , the support arm  150 , the tension spring  148 , and the roller  156 . As the downward force applied to the top of drop segment  158  increases, the force applied by tension spring  148  to the pivot assembly around pivot point  152  also increases. However, the locking block  136  prevents the pivot assembly from moving about pivot point  152 . 
     As the drop segment  158  moves downward under a force, the trigger rod  120  and the trigger block  128  are also forced downward. As the downward force increases, the lower wedged portion of the trigger block  128  moves down and under the trigger roller  130 . This movement forces the trigger roller  130  to ride up along the lower wedged portion of the trigger block  128  and rise away from the back panel  126 . As the trigger roller  130  rises away from the back panel  126 , the locking spring under screw  142  compresses and the plate  132  and the locking roller  134  rise away from the back panel  126 . As the downward force continues to increase, the force will eventually reach a level that is sufficient to push the trigger block  128  down a sufficient amount that the locking roller  134  is raised far enough from the back panel  126  to clear the locking block  136 . At this level of downward pressure, a significant amount of force has been stored in tension spring  148 , which is applied to the pivot assembly in a clock wise direction around pivot point  152 . 
     Once the locking roller  134  clears the locking block  136 , the energy stored in the tension spring  148 , as well as additional force being applied along the top of drop segment  158  and from the weight of drop segment  158 , is released, resulting in the pivot assembly rotating clockwise around pivot point  152 . As the pivot assembly rotates clockwise, the physical support at roller  156  for the drop segment  158  is removed, causing the drop segment  158  to drop downward into the suicide prevention kit  106  and toward the mounting bracket  108 . 
     The tension spring  122  pulls the guide plate  112  around pivot point  114 . As the drop segment  158  falls, the biased force exerted on trigger rod  120  by rod guides  116  and  118  cause the trigger rod  120  to tilt to the right as the drop segment  158  and the trigger rod  120  falls into suicide prevention kit  106 . Once the drop segment  158  comes to rest after the suicide prevention kit  106  has been triggered, the drop segment  158  will form an angled top surface. 
     A sensor  180  may be attached to mounting bracket  108 . A sensor rod  182  is attached to the sensor  180 . The other end of the sensor rod  182  is in contact with plate  132 . The sensor  180  detects when the suicide prevention kit  106  is activated and may be configured to communicate an alert, such as by flashing a light, transmitting a message via a wireless network (e.g., an IEEE 802.11 network, cellular network, or other wireless standard), or sounding an alarm. 
     Referring to  FIG. 4 , the implementation of  FIG. 1 , after the suicide prevention kit  106  has been activated, is depicted. The downward pressure applied to the top surface of the drop segment  158  drives the trigger rod  120  and the trigger block  128  down toward the mounting bracket  108 . As the trigger block moves down, the trigger roller  130  rides up along the lower wedged portion of the trigger block  128 , raising the plate  132  away from the back panel  126  and compressing the locking spring under screw  142 . Once the locking roller  134  rises a sufficient distance to clear locking block  136 , the force provided by tension spring  148  causes the pivot assembly to rotate clockwise about pivot point  152 . 
     The drop segment  158  falls into suicide prevention kit  106  once the two points of support, roller  156  and trigger rod  120 , fall downward toward mounting bracket  108 . The drop segment  158  falls until the stopper  160  comes in contact with the mounting bracket  108  and drop segment  158  comes in contact with pin  164 . The top surface of drop segment  158  forms a sloped surface in which any load will slide down and off the right side of the suicide prevention kit  106 . 
     As the pivot assembly rotates clockwise about pivot point  152 , the plate  132  breaks contact with sensor rod  182 . The sensor  180  then communicates an alert notification indicating that the suicide prevention kit  106  has been activated. 
       FIG. 5  depicts an exemplary method of resetting the suicide prevention kit  106  of  FIG. 1  after the suicide prevention kit  106  has been activated. A reset rod  166  is inserted into reset channel  168  until the reset rod comes in contact with the loading block (not shown) attached to the trigger bracket  140 . The loading block is attached to the leftmost portion of trigger bracket  140  by two screws (shown but not labeled). A force  170  is exerted on reset rod  166  that causes the pivot assembly to rotate counter-clockwise around pivot point  152  as shown by arrow  176 . 
     As the pivot assembly rotates, a force is applied upward on drop segment  158  by roller  156 , causing the drop segment  158  to rise upward away from the mounting bracket  108  as shown by arrow  172 . The locking roller  134  will then contact the top wedged portion of locking block  136 . As the pivot assembly continues to rotate, the locking block  134  will ride up the wedged portion of locking block  136 , raise plate  132  up and away from the back panel  126 , and compress the locking spring under screw  142 . As the locking roller  134  travels past the bottom end of the locking block  136 , the locking roller  134  falls against back panel  126  as a result of the force exerted by the compressed locking spring under screw  142 . 
     As the drop segment  158  rises up and away from pin  164 , trigger rod  120  and trigger block  128  rise as shown by arrow  174 . The trigger block  128  passes under the trigger roller  130  at the point where the plate  132  is elevated off the back panel  126  as a result of locking roller  134  riding up on locking block  136 . The trigger block  128  therefore travels under trigger roller  130  without being obstructed. 
     Once the locking roller  134  clears the locking block  136 , the suicide prevention kit  106  is reset and the reset rod  166  is removed from reset channel  168 . At this point, the suicide prevention assembly is ready for operation. 
     Referring to  FIG. 6 , an exemplary implementation illustrating a portion of a collapsible door  600  that is triggered by a downward or lateral force is depicted. The collapsible door  600  comprises a lower section  602 . The lower section  602  is constructed using the same materials and in the same configuration as a typical door. A break line  604  indicates that the remainder of the lower section  602  has been omitted from the drawing. 
     The collapsible door  600  also comprises a collapsible module  606 . The collapsible module  606  can be added to an existing door by removing the upper portion of the door and replacing the removed upper portion with the collapsible module  606 . Alternately, the collapsible module  606  can be integrated into a new door during construction. 
     In one implementation, the collapsible module  606  is attached to the lower section  602  of the collapsible door  600  by a mounting bracket  608 . The interior of the collapsible module  606  contains an enclosed cavity  610 . A front panel  612  is mounted to the mounting bracket  608 . The front panel  612  encloses the front portion of the collapsible module  606 . A break line  614  indicates that the remainder of the front panel  612  has been omitted from the drawing for clarity. A back panel  616  is attached to the mounting bracket  608 . The back panel  616  encloses the entire back of the collapsible module  606 . A broken line  722  indicates the top edge of the back panel  616  and front panel  612 . The mounting bracket  608 , back panel  616 , and front panel  612  provide structural support for the different components of the collapsible module  606 . 
     A crossbar  618  is mounted to opposite sides of the mounting bracket  608  to provide structural support. The central portion of the crossbar  618  has been removed (as indicated by break lines) to reveal the interior mechanism of the collapsible module  606 . 
     A pivot plate  620  is rotationally attached to the back panel  616  by screw  622 . Support arm  624  and support arm  626  are rotationally attached to the pivot plate  620  under pulley  628 . Each support arm  624  and  626  has a roller,  630  and  632  respectively. 
     A tension wire  642  is attached to support arm  626 , runs over pulley  644  on support arm  624 , over pulley  628 , and is attached to a leverage arm  646  at attachment point  648 . 
     A leverage arm  646  is pivotally attached to the pivot plate  620  at attachment point  650 . A linking bar  652  is attached to the leverage arm  646  at attachment point  654 . A portion of the linking bar  652  has been omitted (as indicated by break lines) to reveal the pivot point for the pivot assembly at screw  622 . The opposite end of the linking bar  652  is attached to a latch bar  656  at attachment point  658 . The latch bar  656  is pivotally attached to pivot plate  620  at attachment point  660 . A loading bar  662  is attached to linking bar  652  at attachment points  664  and  666 . A channel  730  is formed in the top of loading bar  652  and used for resetting the pivot plate  620  after the collapsible door  600  has been triggered. 
     A locking block  702  is attached to the mounting bracket  608 . When the collapsible door  600  is in the loaded position, as shown in  FIG. 6 , the latch bar  656  is held in place by the horizontal portion of the locking block  702 . In this loaded position, the pivot plate  620  is held in place as shown in  FIG. 6 , thereby supporting the blade rail  634  and blade  668  in the raised position. The latch bar  656  is held securely in the loaded position against the locking block  702  by tension spring  704 . Tension spring  704  is attached to the pivot plate  620  at attachment point  706 . The opposite end of tension spring  704  is attached to leverage arm  646  at attachment point  708 . The tension spring  704  exerts a force on leverage arm  646  causing it to rotate clockwise about attachment point  650 . This motion is transferred to the linking bar  652 , which is in turn transferred to the locking bar  656 , causing it to rotate counterclockwise about attachment point  660 . Therefore, as a result of the force exerted by tension spring  704 , the locking bar  656  is forced against the locking block  702 . 
     A blade rail  634  is centrally supported by rollers  630  and  632 . The blade rail is also supported on the left end by turn buckle screw  636  at attachment point  638 . The opposite end of the turn buckle screw  636  is attached to the back panel  616  at attachment point  640  to provide a stationary attachment point for the blade rail, which also serves as a pivot point when the blade rail drops. 
     A collapsible door blade  668  is attached to the blade rail  634 . The blade  668  is also attached to the mounting bracket  608  at attachment point  670  (not visible in  FIG. 6 ). When the blade  668  drops, the blade  668  pivots at attachment point  670 . The opposite end of the blade  668  is not attached to the mounting bracket  608 , which allows that portion of the blade  668  to drop down into the collapsible module  606  when triggered. 
     In one implementation, the blade  668  is attached to the blade rail  634  at multiple anchor points  672 ,  674 ,  676 . In one implementation, the anchor points  672 ,  674 , and  676  are embedded within the blade  668 . A wire  680  attaches to anchor point  672 . The wire  680  runs over pulley  686 , which is mounted to blade rail  634 , and connects to tension spring  688 . Tension spring  688  is attached to the blade rail  634  at attachment point  690 . 
     A wire  692  attaches to anchor point  674 . The wire  692  passes through pivot arm  696  and through a holder  694 , which secures the wire  692 . 
     The wire  684  attaches to anchor point  676 . The wire  684  runs over pulley  696 , which is mounted to blade rail  634 , and connects to tension spring  698 . Tension spring  698  is attached to the blade rail  634  at attachment point  700 . The tension springs  688  and  698  hold the blade  668  in a vertical position, but also allows the top of the blade  668  to move laterally (i.e., tilt backwards and forwards relative to the view in  FIG. 6 ) while the blade rail  634  remains stationary. 
     A leverage arm  696  is pivotally attached to the blade rail  634  at attachment point  710 . A spring  712  pushes against leverage arm  696 , which creates a clockwise rotational force about attachment point  710 . The spring  712  ensures that the wire  692  is held taut. A trigger bar  714  is connected to the leverage arm  696  by linkage  716 . The trigger bar  714  is pivotally attached to the blade rail  634  at attachment point  718 . A trigger plate  720  is attached to trigger bar  714 . 
     The blade rail is u-shaped along its length, with the top and bottom edge extending toward the viewer from the portion visible in  FIG. 6 . A portion of the bottom edge is removed at opening  728  to permit the trigger bar  714  to extend through the opening  728  and to permit the trigger plate  720  to rest on the underside of the blade rail  634 . The trigger plate is not directly connected to the blade rail, but is held in place by trigger bar  714 . 
     A stopper  724  is attached to the back plate  616  and positioned to support the support arm  626  when the collapsible door  600  has been triggered. A stopper  726  is attached to the back plate  616  and positioned to support the blade rail  634  when the collapsible door  600  has been triggered. 
     The collapsible door  600  can be triggered by a downward force exerted on the top of blade  668 , by a lateral force exerted on the blade  668  that causes the blade  668  to pivot backward or forward relative to the view in  FIG. 6 , or by a combination of a downward or lateral force. 
     When subjected to a downward force, the blade  668  and the blade rail  634  travel a small distance down into the collapsible door  600 . 
     A sufficient downward force exerted on the blade  668  will trigger the mechanism and cause the blade to drop down into the collapsible door  600 . If the downward force is insufficient to trigger the mechanism, the force exerted by the tension spring  704  will cause the blade  668  to return to its original position. If the force is sufficient, the mechanism is triggered as described in the following paragraphs. 
     As the blade rail  634  travels downward, it pushes against rollers  630  and  632 , which causes the rollers to travel in opposite directions along the blade rail  634 . 
     As the rollers travel in opposite directions, the length of wire  642  between support arm  626  and support arm  624  increases. As a result, the length of the wire  642  between roller  628  and leverage arm  646  decreases. This motion acts counter to the tension spring  704  and rotates the leverage arm  646  counterclockwise at attachment point  650 . The leverage arm  646  causes the latch bar  656  to rotate clockwise at attachment point  660  via linking bar  652 . 
     Once the top of latch bar  656  clears the locking block  702 , the pivot plate  620  rotates clockwise. As a result, the support of the blade rail  634  is removed and the blade  668  is permitted to fall into the collapsible door  600 . Once triggered, the support arm  626  will come to rest against stopper  724  and the blade rail  634  will come to rest against stopper  726 . 
     When subjected to a lateral force, the blade  668  pivots along the bottom edge of the blade  668  that is in contact with the blade rail  634 . As the blade  668  pivots in this manner, the wire  692  is pulled up, exerting a force that counters the force of the spring  712  and causes the pivot arm  696  to rotate counterclockwise about attachment point  710 . 
     A sufficient lateral force exerted on the blade  668  will trigger the mechanism and cause the blade to drop down into the collapsible door  600 . If the lateral force is insufficient to trigger the mechanism, the force exerted by the tension springs  688  and  698  and by the spring  712  will cause the blade  668  to return to a vertical position. If the force is sufficient, the mechanism is triggered as described in the following paragraphs. 
     The movement of the pivot arm  696  pulls up on the trigger bar  714  via the linkage  716 . This causes the trigger bar  714  to rotate clockwise about attachment point  718 . As a result, the trigger plate  720 , which is attached to the trigger bar  714 , is forced downward against the roller  632 . 
     As the roller  632  is forced downward, the length of wire  642  between support arm  626  and support arm  624  increases. As a result, the length of the wire  642  between roller  628  and leverage arm  646  decreases. This motion acts counter to the tension spring  704  and rotates the leverage arm  646  counterclockwise at attachment point  650 . The leverage arm  646  causes the latch bar  656  to rotate clockwise at attachment point  660  via linking bar  652 . Once the top of latch bar  656  clears the locking block  702 , the pivot plate  620  rotates clockwise. As a result, the support of the blade rail  634  is removed and the blade  668  is permitted to fall into the collapsible door  600 . Once triggered, the support arm  626  will come to rest against stopper  724  and the blade rail  634  will come to rest against stopper  726 . 
     Referring to  FIG. 7 , the collapsible door of  FIG. 6  after being triggered is depicted. The top surface of the blade  668  is at an angle. The pivot plate  620  has been rotated about attachment point  622  (hidden by linking bar  652  in this view). The support arm  626  rests against stopper  724  and the blade rail  634  rests against stopper  726 . 
     Referring to  FIG. 8 , the process for reloading the collapsible door of  FIG. 7  is depicted. A reset rod  802  is inserted through an opening at the top of the collapsible door  600 . In one implementation, the reset rod  802  is inserted into an opening formed in the top edge of the blade  668 . In one implementation, the blade does not take up the entire space between the front panel  612  and back panel  616 . In this implementation, a channel runs along most of the length of the blade  668  and the reset rod  802  is inserted into this channel. 
     The reset rod  802  is set into a channel in the top of the loading bar  662 . A force  804  is exerted on reset rod  802  that causes the pivot plate  620  to rotate counter-clockwise around screw  622  as indicated by arrow  806 . The pivot plate  620  rotates until the top of latch bar  656  travels past the lip of locking block  702  and locks in place. 
     As the pivot plate  620  rotates, the blade  668  and blade rail  634  are raised to a horizontal position by the support arms  624  and  626 . 
     While the invention is described through the above-described exemplary implementations, it will be understood by those of ordinary skill in the art that modifications to, and variations of, the present system may be made without departing from the inventive concepts disclosed herein. For example, while the implementations are described in connection with various illustrative structures, one skilled in the art will recognize that the collapsible door may be embodied using a variety of dimensions, components, and mechanisms. Furthermore, disclosed aspects, or portions of these aspects, may be combined in ways not listed above. Accordingly, the invention should not be viewed as being limited to the disclosed implementations. 
     The present system may be embodied in other specific forms without departing from its spirit or essential characteristics. The described implementations are to be considered in all respects only as illustrative and not restrictive. The scope of the invention should, therefore, be determined not with reference to the above description, but instead should be determined with reference to the pending claims along with their full scope or equivalents, and all changes which come within the meaning and range of equivalency of the claims are to be embraced within their full scope.