Patent Publication Number: US-2018049340-A1

Title: Top loading cartridge

Description:
PRIORITY INFORMATION 
     This application is a continuation of U.S. application Ser. No. 14/780,520 filed on Sep. 25, 2015, which claims priority to International Application No. PCT/US2013/033914 filed on Mar. 26, 2013. The entire contents of which are incorporated herein by reference. 
    
    
     BACKGROUND 
     A data center rack contains electronic components. A chassis fits into the data center rack. The chassis includes a tray to receive electronic components for processing, storage, memory, networking, and cooling. The electronic components may be arranged in a variety of ways depending on the type of electronic component, purpose of the electronic component, and computing needs. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Non-limiting examples of the present, disclosure are described in the following description, read with reference to the figures attached hereto and do not limit the scope of the claims. In the figures, identical and similar structures, elements or parts thereof that appear in more than one figure are generally labeled with the same or similar references in the figures in which they appear. Dimensions of components and features illustrated in the figures are chosen primarily for convenience and clarity of presentation and are not necessarily to scale. Referring to the attached figures: 
         FIG. 1  illustrates a block diagram of a top loading cartridge according to an example; 
         FIGS. 2A-2B  illustrate perspective views of the top loading cartridge of  FIG. 1  according to examples; 
         FIGS. 2C-2D  illustrate enlarged views of a portion of the lock mechanism of  FIGS. 2A-2B  according to examples; 
         FIGS. 3A-3F  illustrate perspective views of he top loading server cartridges of  FIG. 1  according to examples; 
         FIGS. 4A-4B  illustrate perspective views of the top loading fan cartridge of  FIG. 1  according to examples; 
         FIGS. 5A-5B  illustrate perspective views of the top loading network switch cartridge of  FIG. 1  according to examples; 
         FIG. 6  illustrates a block diagram of a system for modular computing according to an example; 
         FIGS. 7-8  illustrate examples of the system of  FIG. 6  according to example and 
         FIGS. 9-10  illustrate flow charts of methods for modular computing using a top loading cartridge. 
     
    
    
     DETAILED DESCRIPTION 
     In the following detailed description, reference is made to the accompanying drawings which form a part hereof, and in which is depicted by way of illustration specific examples in which the present disclosure may be practiced. It is to be understood that other examples may, be utilized and structural or logical changes may be made without departing from the scope of the present disclosure. 
     Data center racks are designed to provide a variety of computing solutions. The design of the data center rack must balance conflicts between power density, spatial layout, temperature requirements, acoustic noise, and other factors. The type of electronic components installed in the data center rack depends on the computing solution and the power and cooling requirements. The electronic components are mounted or loaded on a tray in a chassis. The chassis is housed in the data center rack. For example, the electronic components may be electronic modules that are loaded into the front or the side of the chassis. Each chassis may contain a plurality of modules, each containing one or a combination of hard drives, processors, heat sinks, fans, network switches in a single tray. When service is needed, all the modules in the chassis are shut down to access the desired modules. 
     In examples, a top loading cartridge is provided. The top loading cartridge includes a support member, a rail member, and a lock mechanism. The support member to receive an electronic module. The rail member attached to the support member to engage with a tray that receives the top loading server cartridge. The lock mechanism to lock the top loading cartridge. The top loading cartridge provides the ability increase the density of a chassis and the flexibility to, service each top loading cartridge individually without shutting down other cartridges or components on the chassis. 
       FIG. 1  illustrates a block diagram a top loading cartridge  100  according to an example. The top loading cartridge  100  includes a support member  120 , a rail member  140 , and a lock mechanism  160 . The support member  120  to receive an electronic module. For example, the electronic module may include a server module, a fan module, and/or a network switch module. The server module includes, for example, a combination of at least one of the following: a hard drive, a processor, a heat sink, and a memory. The fan module includes, for example, at least one fan. The network switch module includes, for example, at least one network switch, a heat sink, and a memory module. 
     The rail member  140  to attach to the support member  120  to engage with a tray that receives the top loading cartridge  100 . The lock mechanism  160  to lock the top loading cartridge  100  in the tray. The lock mechanism  160  includes a housing  162 , a tray engagement member  164 , a tab  165 , a lock engagement member  167 , and a resilient member  169 . 
       FIGS. 2A-2B  illustrate perspective views of the top loading cartridge  100  of  FIG. 1  according to an example. The top loading cartridge  100  illustrated includes the support member  120 , the rail member  140 , and the lock mechanism  160 . Referring to  FIG. 2A , the support member  120  as illustrated includes two side walls  222 , a top wall  224 , and a support wall  226 . The two side walls  222  are spaced apart  246  from one another. The top wall  224  traverses the two side walls  222 . The support wall  226  extends between the two side walls  222  to receive the electronic module. An outer surface  226 A of the support wall  226  is illustrated in  FIG. 2A . For example, the support wall  226  may be formed of a sheet metal. 
       FIG. 2B  illustrates an inner surface  226 B of the support wall  226  with an electronic module installed therein. For example, the electronic module may include a server module  230 , a fan module, and/or a network switch module.  FIG. 2B  illustrates an example of the electronic module as a server module  230  that includes a hard drive  232 , a heat sink  234 , a memory module  236 , and a battery  238 . Additional components may be included. 
     The support member  120  further includes a lock receptacle  268  formed in the top wall  224  to receive the lock engagement member  167 . The lock receptacle  268  includes a lock protrusion  267  extending therefrom to engage with the lock, engagement member  167  and secure the housing  162  in a locked position P L , illustrated in  FIG. 3A . Referring to  FIG. 2B , the support member  120  may further include an electromagnetic interface (EMI) gasket  228  (or EMI shielding). An EMI gasket  228  is illustrated along the top wall  224  of the support member  120 . 
     As illustrated in  FIGS. 2A-2B , the rail member  140  includes a first rail portion  242  and a second rail portion  244 . The first rail portion  242  and the second rail portion  244  are spaced apart  246  from one another such that the first rail portion  242  mates with the support member  120  and the second rail portion  244  engages with the tray  282 . The rail member  140  may be formed of a plastic with apertures or voids therein to form the area that makes the first rail portion  242  and the second rail portion  244  spaced apart  246  from one another. For example, the first rail portion  242  may be formed of a planar member, and the second rail portion  244  may be formed with an arc or convex surface extending from the side wall  222  or the first rail portion  242 . The rail member  140  may be attached to the support member  120  via a fastener  248 , such as a screw. 
     The rail member  140  engages with a guide rail  284  that lies along the tray  282 , as illustrated in  FIG. 2A . The tray  282  includes openings  283  to receive the top loading cartridges  100  and guide rails  284  to align the top loading cartridges  100 . The size of the opening  283  formed in the tray  282  may vary depending on the size of the top loading cartridges  100  intended to be loaded therein. For example, one cartridge slot is used to refer to a standard length and width illustrated in  FIGS. 2A-2B . Other sizes will be referred to based on the standard length  1 L and width  1 W. The guide rail  284  may be formed of a sheet metal that forms a track or rail that receives the rail member  140 . For example, the rail member  140  slides into the guide rail  284  or vice versa. The rail member  140  and the guide rail  284  are formed to reduce vibration and provide a tight fit between the top loading cartridge  100  and the tray  282 . 
     The lock mechanism  160  moves between a locked position P L  (further illustrated in  FIGS. 3A-3F ) and an unlocked position P U . The lock mechanism  160  includes the housing  162 , the tray engagement member  164 , a tab  165 , a lock engagement member  167 , and a resilient member  169 . The housing  162  to hingedly attach to the support member  120 . A tray engagement member  164  to extend from the housing  162  to engage with a tray  282  attached to a chassis  280 . For example, the tray engagement member  164  includes a tray hook  166  that moves with the housing  162  simultaneously or as a unitary member. The housing  162  and the tray engagement member  164  are formed to rotate about the hinge  262  where the housing  162  attaches to the support member  120 . The hinge  262  is formed, for example, by inserting a fastener  263  through a support aperture  265  formed in the support member  120  and a housing aperture  266  formed in the housing  162  to enable the housing  162  to pivot or rotate about the support member  120 . 
     The tab  165  to connect to the housing  162 . The tab  165  is moveable between a first position T 1  and a second position T 2 .  FIGS. 2C-2D  illustrate enlarged views of a portion of  FIGS. 2A-2B  according to an example. For example, in  FIGS. 2B, 2D , the tab  165  is in the first position T 1 , positioned to be protracted or extend from the housing  162 .  FIGS. 2A and 2D , the tab  165  is in the second position T 2 , positioned to be retracted at least partially into the housing  162 . The lock engagement member  167  to extend from the tab  165  to engage with the support member  120 . The engagement with the support member  120  holds the lock mechanism  160  in place. The lock engagement member  167  to move with the tab  165  as a unitary member or simultaneously. For example, the lock engagement member  167  includes a look hook  168  that moves with the tab  165  between the first position T 1  and the second position T 2 . 
     The resilient member  169  to connect to the tab  165 . The resilient member  169  is spring loaded and formed to move between an equilibrium position R E  and a displaced position R D . The resilient member  169  moves based on a force F applied to the tab  165 . For example, the tab  165  remains in a first position T 1  when no force is applied to the tab  165 . When the tab  165  is in the first position T 1 , the resilient member  169  is in an equilibrium position R E . When the tab  165  is in the second position T 2  a force F is applied to the tab  165 . The force F moves the resilient member  169  to a displaced position R D , for example, the resilient member  169  compresses. For example, the resilient member  169  includes at least one spring.  FIGS. 2A-2D  are illustrated to include two springs  169 A,  169 B per tab  165 . 
     The top loading cartridge  100  may further include a display  250 , as illustrated in  FIG. 2B . The display  250  may include a power button  252 , a unique identification (DID) button  254 , and/or a link button  256  to indicate when the top loading cartridge  100  is properly installed and connected to the system board. The display  250  may also be illuminated using a plurality of light-emitting diodes (LED)  258  and may include additional features and/or indicators. 
     Referring to  FIG. 2A , the top loading cartridge  100  may also include a keyed cartridge label  264  that provide a visual identification of the top loading cartridge  100 . The keyed cartridge labels  264  may be formed of molded plastic and each have a distinct, shape, size, and/or color to identify the type of cartridge and to ensure proper placement and/or labeling on the top loading cartridge  100 . For example, the top label  264 A may identify the type of top loading cartridge  100  by color or icon. The middle label  264 B may be used for branding, such as a product line, logo, or company name. The bottom label  264 C may be used to provide a model number or serial number for the top loading cartridge  100 . 
     For example, the top loading cartridge  100  may be inserted as illustrated in  FIG. 2A . The lock mechanism  160  is positioned with the housing  162  in an unlocked position P U  and extended from the support member  120  such that the lock engagement member  167  is not engaged with the support member  120 . The top loading cartridge  100  is pushed down or inserted as illustrated by arrow After the top loading cartridge  100  is inserted, the lock mechanism  160  moves to the locked position P L  by rotating the housing  162  as illustrated by arrows  2 . To move into the locked position F L , a force F is applied to the tab  165  to move the tab  165  into a second position T 2 , which moves the lock engagement member  167  and compresses or displaces the resilient member  169  into position R D  (i.e.,  FIG. 2C ). Movement of the tab  165  into the second position T 2  enables the lock engagement member  167  to fit into the lock receptacle  268 . Release of the tab  165  moves the tab  165  back to the first position T 1  with the resilient member  169  in the equilibrium position R E  (i.e.,  FIG. 2D ).  FIG. 3A  below illustrates the locked position P L . In the locked position P L , the tray engagement member  164  engages with the tray  282  and the lock engagement member  167  engages with the support member  120 , i.e., the lock receptacle  268  and the lock protrusion  267 . 
       FIG. 2B  illustrates the removal of the top loading cartridge  100 , where the top loading cartridge  100  is, for example, a server cartridge  200 . The removal begins with application of the force F to the tab  165  to move the tab  165  into a second position T 2 , which moves the lock engagement member  167  and compresses or displaces the resilient member  169  into position R D . When the tab  165  is in the second position T 2 , the lock mechanism  160  can be moved into an unlocked position P U  by rotating the housing  162  as illustrated by arrows  3 . After the lock mechanism  160  is in the unlocked position P U , the top loading cartridge  100  may be removed from the tray  282 , as illustrated by arrow  4 . The top loading cartridge  100  further includes board connector  270  that connects the top loading cartridge  100  to the system board to enable communication therebetween. Examples of board connectors  270  include high speed connectors or Peripheral Component Interconnect (PCI) express connectors. 
       FIGS. 3A-5B  illustrate examples of the electronic modules that may be used with the top loading cartridge  100 .  FIGS. 3A-3F  illustrate perspective views of the top loading server cartridge  200 . Each of the server cartridges  200  illustrated has the lock mechanism  160  with the housing  162  in the locked position P L . In the locked position P L , the housing  162  is connected to the support member  120  and the lock engagement member  167  engages with the support member  120  via the lock receptacle  268  and the lock protrusion  267 . The tab  165  is in a first position T 1  and the resilient member  169  is in an equilibrium position R E  or near an equilibrium position R E , such that the lock mechanism  160  remains in the locked position P L . 
     Referring to  FIG. 3A , the server cartridge  200  is illustrated prior to installation into the tray  282 . The server cartridge  200  includes a hard drive  232  and a heat sink  234 . The hard drive  232  is illustrated as being installed into the server cartridge  200  with the server cartridge  200  lying on a support wall  226 . The hard drive  232  is inserted into the support member  120  and positioned against the support wall  226 , as illustrated by arrow  5 . The handle  233  of the hard drive  232  is rotated to extend from the hard drive  232  during insertion. After the hard drive  232  is inserted into the support member  120  the handle  233  may be rotated to lay against the hard drive  232 , as illustrated by the motion of arrow  6 . Rotation of the handle  233  causes the hard drive  232  to move into the proper position in the support member  120 , as illustrated by arrows  7 . The hard drive  232  is illustrated as including an L-shaped alignment member  331  that aligns the hard drive  232  by allowing the hard drive  232  to be inserted via a first alignment portion  332  when inserted through an alignment pin  334  as illustrated by the motion of arrow  5 . A second alignment portion  333  positions the hard drive  232  as the handle  233  is rotated by the motion of arrow  6 . The second alignment portion  333  guides the hard drive  232  as illustrated by the motion of arrows  7 . This positions and locks the hard drive  232  securely in the server cartridge  200 . 
     Referring to  FIGS. 3B-3F , examples of other server cartridge  200  arrangements are illustrated. In  FIG. 3B  a server cartridge  200  for storage is illustrated. The server cartridge  200  includes two hard drives  232 .  FIG. 3C  illustrates a server cartridge  200  having four processors  235  with four heat sinks  234  connected thereto. The server cartridge  200  illustrated in  FIG. 3D  includes two processors  235  with two heat sinks  234  and two memory modules  236 .  FIGS. 3E-3F  illustrate server cartridges  200  that have the same length as the server cartridges  200  of  FIGS. 3A-3D , but have a larger width that takes up two cartridge slots  2 W in the tray  262 . For example,  FIG. 3E  illustrates a server cartridge  200  with memory modules  236  that include four sets of full size DIMMs and a processor  235  with a heat sink  234 . The server cartridge  200  illustrated in  FIG. 3F  includes two memory modules  236  and two processors  235 . 
       FIGS. 4A-4B  illustrate perspective views of the top loading fan cartridge  400  of  FIG. 1  according to examples. The fan cartridge  400  includes the support member  120  with an EMI gasket  228  along the top wall  224 , rail member  140  attached to the side walls  222  of the support member  120 , and lock mechanism  160  hingedly attached to the top, wall  224  of the support member, as discussed and illustrated above with reference to  FIGS. 1-3B . The size of the fan cartridges  430  are the width of two cartridge slots  2 W and length of one cartridge slot  1 L. As such, the fan cartridge  400  may be wider than the server cartridges  200  illustrated in  FIGS. 3A-3D  above. The fan cartridge  400  may receive power from a board connector  270  connected to the system board or a set of wires and batteries that communicate with the system board. The portion of the tray  282  that receives the fan module  430  may include air apertures (as illustrated in  FIG. 8 ) that circulate air from the fans  432  and the fan modules  430  throughout the tray  282 . 
       FIG. 4A  illustrates a view of the fans  432  mounted or attached to an inner surface  226 B of a support wall  226  of the support member  120 . The fans  432  are attached using fasteners  434 , such as screws, but may also be attached by other methods. The fan cartridge  400  is illustrated to include a plurality of fans  432 . Six fans  432  are illustrated ill two rows of three fans  432 ; however, any arrangement and number of fans  432  may be attached to the support member  120 . Referring to  FIG. 4B , a view of an outer surface  226 A of the support wall  226  is illustrated. The support wall  226  includes fan apertures  436  that are formed in the sheet metal of the support wall  226  to enable the fan module to be mounted therein. 
       FIGS. 5A-5B  illustrate perspective views of the top loading network switch cartridge  500  of  FIG. 1  according to examples. The network switch cartridge  500  includes the support member  120  with an EMI gasket  228  along the top wall  224 , rail member  140  attached to the side walls  222  of the support member  120 , and lock mechanism  160  hingedly attached to the top wall  224  of the support member, as discussed and illustrated above with reference to  FIGS. 1-2B . The size of the network switch cartridges  500  have the width of one cartridge slot  1 W and an elongated length. For example, the length of the network switch cartridge  500  may be equivalent to the length of four server cartridges  200  or cartridge slots  4 L. 
       FIG. 5A  illustrates a side view of the network switch cartridge  500  with the network switch  532  visible. The network switch  532  includes a distant remote switching module (DRM), heat sinks  234 , and a memory module  236 , such as SO-DIMMs. The network switch cartridge  500  connects to the system board via board connectors  270 , such as high speed connectors or PCI express connectors. The network switch cartridge  500  is illustrated with the lock mechanism  160  in the unlocked position P U  with the tab  165  in the first position T 1  and the resilient member  169  in the equilibrium position R E . 
     Referring to  5 B, a view of the top of the network switch is illustrated. The lock mechanism  160  is illustrated with the housing  162  in the locked position P L . In the locked position P L , the lock engagement member  167  is engaged with the support member  120 , the tab  165  is in the first position T 1 , and the resilient member  169  is in the equilibrium position R E . The display  250  is on the top wall  224  with a power button  252 , a link button  256 , and a thermal detection button  556  that detects proper installation using, for example an optical sensor. 
       FIG. 6  illustrates a block diagram of a system  600  for modular computing according to an example. The system  600  provides a server with shared chassis, power, cooling, storage, fabric, and management The system  600  includes a top loading cartridge  100 , a chassis  280 , and a tray  282 . The top loading cartridge  100  includes a support member  120 , a rail member  140 , and a lock mechanism  160  as illustrated and described above. The chassis  280  to receive the top loading cartridge  100 . The tray  282  to attach to the chassis  280  and align the top loading cartridge  100  in the chassis  280 . 
       FIGS. 7-8  illustrate examples of the system  600  of  FIG. 6  according to examples. Referring to  FIG. 7 , the system  600  is illustrated to include the chassis  280  with a tray  282  attached to the chassis  280 . The tray  282  aligns the top loading cartridge(s)  100  in the chassis  280 . For example, the chassis  280  and the tray  282  may be formed to receive a combination of the server cartridge  200 , the fan cartridge  400 , and the network switch cartridge  500 ; however, the chassis  280  and the tray  282  may be formed to receive a single type of cartridge and/or additional cartridges.  FIG. 7  illustrates a partially exploded view of the top loading cartridges  100 . The chassis  280  and tray  282  illustrated are designed to receive a combination of top loading cartridges  100 , such as the server cartridges  200 , the fan cartridges  400 , and/or the network switch cartridges  500 . 
     As discussed above, the top loading cartridge  100  includes the support member  120  to receive an electronic module, such as a server module  230 , a fan module  430 , and/or a network switch module  530 . The rail member  140  attaches to the, support member  120  to engage with the tray  282  that receives the top loading cartridge  100 . The lock mechanism  160  to lock the top loading cartridge  100  in the tray  282 . The lock mechanism to move between a locked position P L  and an unlocked position P U . The lock mechanism  160  includes a housing  162 , a tray engagement member  164 , a tab  165 , a lock engagement member  167 , and a resilient member  169 . 
     Referring to  FIG. 8 , the system  600  further includes a system board  870  coupled to the chassis  280 . The system board  870  to connect with the top loading cartridge  100  to enable communication therebetween. For example, the system board  870  may connect to the server cartridge  200  via a board connector  270 . The system board  870  may connect to the fan cartridge  400  via a board connector  270  or via a communication connector  872  when the fans  432  are powered by wires  832  and batteries  834 . The system board  870  may connect to the network switch cartridge  500  via the board connector  270 . 
     The tray  282  includes tray inserts  852  to form cartridge slots  850  that receive the top loading cartridges  100 . The tray inserts  852  are inserted into the tray along a tray alignment member  854  formed in the tray  282 . The tray inserts  852  may be removable to accommodate top loading cartridges  100  that require, for example, one cartridge slot (i.e., server cartridge  200 ), two cartridge slots (i.e., server cartridge  200  or fan cartridge  400 ), or four cartridge slots (i.e., network switch cartridge  500 ). The tray  282  is illustrated to include the guide rails  284  to mate with the rail member  140 . The first rail portion  242  lies flush with the support member  120 . The second rail portion  244  is spaced apart  246  from the support member  120  to engage with the guide rail  284  and reduce vibration of the top loading cartridge  100 . The first and second portions  242 ,  244  of the rail member  140  may be spaced apart  246  using, for example, apertures or voids in the plastic portion that forms the rail member  140 . For example, the first rail portion  242  may be formed of a planar member, and the second rail portion  244  may be formed with an arc or convex surface extending from the side wall  222  or the first rail portion  242 . 
     The tray  282  may further include air apertures  851  formed therein that circulate air from the fans  432  and the fan modules  430  throughout the tray  282 . The tray  282  is further illustrated to include a tray receptacle  856  to receive and engage with the tray engagement member  164 . The tray receptacle  856  may further include a tray protrusion  858  that engages with the tray engagement member  164 , such as a tray hook  166 , and secures the top loading cartridge  100  in the tray  282 . The tray receptacle  856  and tray protrusion  858  may also be referred to as a camming surface and the tray engagement member  164  may also be referred to as a cam that engages with the camming surface. 
       FIG. 8  illustrates sever cartridges  200  installed and a fan cartridge  400  partially inserted. The fan cartridge  400  is illustrated with the lock mechanism  160  being used to insert the fan cartridge  400  into the tray  282 . The housing  162  is in an unlocked position P U  with the tabs  165  in a first position T 1 . After the fan cartridge  400  is inserted into the tray  282 , the lock mechanism  160  rotates between the unlocked position P U  and a locked position P L . In the locked position P L , the lock engagement member  167  engages with the support member  120  and the tray engagement member  164  engages with the tray  282 . For example, as illustrated in  FIGS. 2C-2D , a force F is applied to the tab  165  as the housing  162  is rotated to move the lock engagement member  167  into the receptacle  268 . When the force F is applied to the tab  165 , the tab  165  is in a second position T 2  and the resilient member  169  is in a displaced or compressed position R D . The force F is removed from the tab  165  to enable the lock engagement member  167 , such as a lock hook  168 , to engage with a lock protrusion  267 . When the force F is removed the tab  165  returns to a first position T 1  and the resilient member  169  returns to an equilibrium position R E . 
       FIGS. 9-10  illustrate flow charts  900  and  1000  of methods for modular computing using a top loading cartridge according to examples. The method inserts the top loading cartridge into a tray attached to a server chassis, in block  920 . The top loading cartridge includes a support member, a rail member, and a lock mechanism. The support member to receive an electronic module. The rail member attached to the support member to engage with a tray that receives the top loading cartridge. The lock mechanism to move between a locked position and an unlocked position. The lock mechanism includes a housing, a tray engagement member, a tab, a lock engagement member, and a resilient member. The housing to hingedly attach to the support member. The housing rotates to move the lock mechanism between the locked position and the unlocked position. The tray engagement member to extend from the housing to engage with a tray attached to a chassis. The tab to connect to the housing. The tab moveable between a first position and a second position. The lock engagement member to extend from the tab to engage with the support member. The resilient member to connect to the tab. The resilient member to move between an equilibrium position and a displaced position based on a force applied to the tab. 
     The lock mechanism rotates towards a locked position in block  940 . For example, the housing of the lock mechanism rotates between a locked position and an unlocked position. In the locked position, the tray engagement member engages with the tray and the lock engagement member engages with the support member. In block  960 , the force is applied to the tab to move the tab between a first position and a second position. As the tab is in the second position, with the force applied, the lock mechanism may be moved into the locked position. The tab is released after the lock mechanism moves into the locked position, in block  980 . Release of the tab causes the lock engagement member to engage with the support member via the lock protrusion, the tray engagement member to engage with the tray via the tray protrusion, and attach the top loading cartridge to the tray. 
       FIG. 10  illustrates the flow chart  1000  for removal of the top loading, cartridge. In block  1020 , a force is applied to the tab to move the tab between the first position and the second position. The lock mechanism is rotated towards the unlocked position in block  1040 . The tab is released in block  1060  after the lock mechanism moves into the unlocked position. The top loading cartridge is removed from the tray in block  1080 , for example, by lifting up the top loading cartridge out of the tray. 
     Although the flow diagrams of  FIGS. 9-10  illustrate specific orders of execution, the order of execution may differ from that which is illustrated. For example, the order of execution of the blocks may be scrambled relative to the order shown. Also, the blocks shown in succession may be executed concurrently or with partial concurrence. All such variations are within the scope of the present disclosure. 
     The present disclosure has been described using non-limiting detailed descriptions of examples thereof and is not intended to limit the scope of the present disclosure. It should be understood that features and/or operations described with respect to one example may be used with other examples and that not all examples of the present disclosure have all of the features and/or operations illustrated in a particular figure or described with respect to one of the examples. Variations of examples described will occur to persons of the art. Furthermore, the terms “comprise,” “include,” “have” and their conjugates, shall mean, when used in the present disclosure and/or claims, “including but not necessarily limited to.” 
     It is noted that some of the above described examples may include structure, acts or details of structures and acts that may not be essential to the present disclosure and are intended to be exemplary. Structure and acts described herein are replaceable by equivalents, which perform the same function, even if the structure or acts are different, as known in the art. Therefore, the scope of the present disclosure is limited only by the elements and limitations as used in the claims.