Abstract: A shelving system includes a support post having a mounting surface and a plurality of vertically spaced retention members extending from the mounting surface. A shelf includes a bracket member configured for coupling to a first of the vertically spaced retention members. A support bracket includes an attachment portion configured for coupling to a second of the vertically spaced retention members adjacent the first vertically spaced retention member and a support portion configured for coupling to the bracket member.

Abstract: A bracket mechanism includes a connecting wall and a mounting device. The mounting device and the connecting wall are movable relative to each other to be in a locking state or an unlocking state. The mounting device includes at least one mounting member. When the mounting device and the connecting wall are in the locking state, the at least one mounting member is adjacent to the connecting wall to be closed relative to each other. When the mounting device and the connecting wall are in the unlocking state, the at least one mounting member is away from the connecting wall to be opened relative to each other.

Abstract: Systems and methods for mounting a motor to a receiving device of a UAS are disclosed herein. The motor may include a number of protruding elements, each protruding element including a shank segment having a first diameter and a head segment having a second diameter that is larger than the first diameter. The receiving device may include a base configured to couple the receiving device to the UAS, a first sidewall extending upwardly from a first side of the base, and a second sidewall extending upwardly from a second side of the base. Both the first and second sidewalls may include at least one receptacle. The head segment of each protruding element may be configured to interlock with one or more of the receptacles of the first sidewall or the second sidewall when the protruding elements are inserted between the first sidewall and the second sidewall of the receiving device.

Abstract: A bracket adapted for mounting a slide rail to a post of a rack includes a bracket plate, a mounting member, a first fastening member, and an engaging base. The bracket plate is attached to the slide rail. The mounting member is connected to the bracket plate and can be mounted to the post. The first fastening member is movably mounted on the bracket plate and has a fastening portion to be locked to the post. The engaging base is coupled to the first fastening member and includes first and second portions. A second fastening member can enter a space between the second portion and the first fastening member, engage with the second portion, and thus be prevented from detachment from the engaging base.

Abstract: A slide rail mechanism includes a rail member, a first supporting frame, a second supporting frame, a bracket and a reinforcing member. The first supporting frame is movable relative to the rail member. The second supporting frame is movable relative to the first supporting member. The bracket and the second supporting frame are movable relative to each other. The reinforcing member is movable relative to the rail member in response to movement of the first supporting frame. Wherein, the rail member includes a first engaging structure, and the reinforcing member includes a second engaging structure. The reinforcing member is configured to be engaged with the first engaging structure through the second engaging structure.

Abstract: A bracket device includes a sidewall, at least one mounting member, an elastic member, and a fastening member is adjacent to the sidewall. The at least one mounting member is connected to the base. The fastening member is movably mounted on the sidewall, includes an engaging structure, can stay in a first state responsive to the elastic force provided by the elastic member, and can be switched from the first state to a second state by operation. The engaging structure of the fastening member is configured to engage with or be mounted to a target member.

Abstract: A system for providing a virtual reality experience includes a display associated with a field of view of a user. A virtual reality system renders a virtual realty world responsive to a movement of the user and displays the rendered virtual reality world to a user through the display. A configurable virtual reality environment model may be configured to place physical walls in a location that corresponds to a virtual wall located within with virtual realty world such that when the display shows the user touching a wall in the virtual reality world, the user feels the physical wall placed in the configurable virtual reality environment.

Abstract: A tool for temporarily supporting electronic equipment or panel on an equipment rack is provided. The tool includes an engagement block having a pin for insertion through a mounting aperture of a post of the rack and an upper support surface for supporting or positioning a mounting flange of a faceplate of electronic equipment or panel rested freely thereon. The support surface is spaced from the pin such that, when the pin is inserted into a mounting aperture of the post and the mounting flange of the faceplate is freely rested on the support surface, a mounting aperture extending through the mounting flange is caused to be aligned with a mounting aperture extending through the post of the equipment rack to enable ready permanent connection of the mounting flange to the post with fastening hardware. A method of mounting electronic equipment or panel on an equipment rack is also provided.

Abstract: An example bracket unit to control installation of an electronic module is provided herein. The bracket unit includes a bracket body, a bracket plate, and a fastener. The bracket plate includes a receiving member and an alignment indicator. The receiving member to engage with a rail unit and move between an equilibrium position and a displaced position based on a movement of the rail unit. The alignment indicator connected to the receiving member, such that movement of the alignment indicator corresponds to the movement of the receiving member. The fastener to slideably connect the bracket plate and the bracket body together.

Abstract: A slide rail assembly includes a rail, a first bracket, a second bracket, an elastic member, and a hook. The second bracket is movably mounted to the rail and has a first contact portion. The hook is movably connected to the second bracket and has a second contact portion. The hook remains at a locked position in response to the elastic force of the elastic member. The first contact portion is pressed against the second contact portion in response to displacement of the second bracket such that the hook is moved relative to the second bracket and away from the locked position.

Abstract: A truck rack system includes a truck has a cab, a bed and a frame. The bed has a back end and a rack is hingedly coupled to the bed. The rack is positioned in an upright position having the rack is oriented perpendicular to the bed. Thus, the rack may support an object extending between the cab and the rack. The rack is positioned in a lowered position having the rack being oriented parallel to the bed and extending outwardly from the back end. Thus, the rack may support an object that is placed in the bed. The rack supports an object that has a length that is greater than a length of the bed.

Abstract: A bracket device includes a bracket, at least one mounting member, and a hook. The bracket has an end plate. The at least one mounting member is mounted on the end plate of the bracket. The hook is movably connected to the bracket in order to be at either one of a first position and a second position with respect to the bracket. The hook is extended with respect to the end plate of the bracket when at the first position and is retracted with respect to the end plate of the bracket when at the second position.

Abstract: Tool-free, quick-install rail-kits for installing equipment in rack systems. A telescoping rail body has an inner panel slidably fastened to an outer panel. A self-latching mechanism is disposed at opposite ends of the inner and outer panels. Each self-latching mechanism comprises a latching clip and a locking lever. The latching clip has a catch surface, and is pivotally fastened to the panel body and biased by a biasing member in a latched position. The latching clip is configured to pass through an aperture of a rack post and engage an outer surface of the post with the catch surface. The locking lever is positioned on an inward facing surface of each panel and configured to open inwardly to unlock the latching clip allowing the latching clip to pivot, and to close flush with the inward facing surface to lock the latching clip in the latched position.

Abstract: A rail for mounting a rack-mountable component can include a longitudinal member having a first flange, a spring located proximal to the first end and having an uncompressed state and a compressed state, and a latch having a trigger arm and a cam arm, wherein moving the trigger arm toward the first flange engages the cam arm with the spring to transition the spring from the uncompressed state to the compressed state.

Abstract: A safety mechanism is provided for an electrical equipment rack. The rack has a frame with a vertical frame element including vertically spaced at intervals mounting points which are apertures for accepting mounting pegs of a frame mountable portion of an electrical equipment unit mounting rail. The safety mechanism has a vertical strip member mounted for vertical movement adjacent the vertical frame element, and the vertical strip member includes spaced apertures corresponding to the apertures on the vertical frame element. The vertical strip member is movable between a fully raised position and a lowered position. The safety mechanism further includes a raising mechanism for raising the vertical strip member from a lowered position to the fully raised position.

Abstract: Apparatus and methods related to pipeline freespan support are described. For example, some embodiments may contain an upper structure, which contains at least four legs connected to one another by a number of bracing members, and a number of attachment points through which the upper structure can be lifted, and a lower structure, which contains at least four posts that can be connected to, and disconnected from as needed, the four legs of the upper structure, two spaced mud mats on which the posts stand, and at least two horizontal arms that can be attached to the posts, rotate about the posts, connect to and be locked with the posts on the other mud mat, and be lifted to an appropriate height to provide suitable support at the pipeline freespan location.

Abstract: Escutcheons for a temperature-controlled food holding cabinet are removable and field replaceable by the use of interlocking keys and keyholes that hold the escutcheon in place and align the escutcheon to electrical connectors. The escutcheons are provided with illuminated user interfaces. A key formed on either the escutcheon or chassis of the cabinet, engages a corresponding keyhole formed on either the cabinet chassis or the escutcheon.

Abstract: An electronics cabinet having a cabinet frame, a front equipment rail, and a structural air dam. The cabinet frame includes a first pair of front-to-back beams connected to a pair of top side-to-side beams to form a top frame, a second pair of front-to-back beams connected to a pair of bottom side-to-side beams to form a bottom frame, and a plurality of vertical post connected to the top frame and the bottom frame. The front equipment rail is removably connected to one of the first pair of front-to-back beams and to one of the second pair of front-to-back beams. The structural air dam is connected to the front equipment rail and to one of the plurality of vertical posts.

Abstract: A mount bracket includes a fixing frame, an installation unit, a movable member, a positioning member and a release member. The fixing frame includes a side wall and an end wall. The movable member has a first board movably connected to the side wall and a second board. The first board includes an engaging hole and a contact portion. The positioning member is fixed to the side wall and has an engaging portion. The movable member is movably connected to the first board. When in assembling, the contact portion and the second board contact the inside and outside of a post of a rack. The fixing frame is pushed toward the post to insert the installation unit into the holes of the post. The engaging portion of the positioning member is engaged with the engaging hole of the movable member to connect the movable member to the fixing frame.

Abstract: A bracket pin assembly includes a support plate having an end plate which has at least one opening. The pin includes a base, a support member, a first installation member, a second installation member, and a resilient member. The base has a chamber and the support member is connected to the base. The first and second installation members respectively have a first engaging portion and a second engaging portion. The support member has an engaging section. The resilient member is located in the chamber of the base to bias the first and second installation members. When the installation members of the pin extend through the first installation holes of the first post, the first and second engaging portions are engaged with the engaging section of the support members to secure the first and second installation members relative to the support members.

Abstract: An assembly kit for building a rack includes a plurality of longitudinal members to be arranged vertically, a plurality of cross members to be arranged horizontally, a plurality of node elements that connect the longitudinal members and cross members to each other, and a plurality of rails that accommodate rack bottoms, drawers, and the like. The longitudinal members are provided with holes used to hook in the rails on first lateral surfaces of the longitudinal members facing each other, wherein the holes are T-shaped and include breakouts adjacent to the first lateral surfaces. The rails are longer than the open distance of a front longitudinal member from a rear longitudinal member by the depth of the breakouts and are provided with U-shaped folded edges. The width of the vertically extending section of the T-shaped hole corresponds to the length of the free leg of the U-shaped folded edge.

Abstract: A rack-mounted console module includes a lower unit slideably mounted on a rail and an upper unit pivotally coupled to the lower unit. A locking mechanism includes a first part moveably disposed in the lower unit and a second part fixedly disposed on the rail. When the upper unit is closed and the lower unit slides along the rail to a target position, the first part of the locking mechanism changes from a released state to a locked state where it engages the second part of the locking mechanism to lock the lower unit. When the upper unit is opened, the first part changes from the locked state to a ready-to-released state. When the upper unit is subsequently closed, the first part changes from the ready-to-released state to a released state where it disengages from the second part, and the console module can be slid back into the rack.

Abstract: An office workwall assembly includes a work frame assembly that includes a pair of vertical frame members, a horizontal frame member extending between and operably coupled to the pair of vertical frame members, wherein the pair of vertical frame members each include at least one longitudinally-extending channel. The frame assembly further includes a pair of frame mounting bracket secured within the at least one channel by at least one mechanical fastener and adapted to be secured to a wall structure and support the frame assembly from the wall structure, wherein the vertical frame members may be vertically, horizontally and/or angularly adjusted with respect to the mounting bracket positioned within the channel. The workwall assembly also includes an office utility assembly operably coupled with and supported by the pair of vertical frame members, wherein the office utility assembly is cantilevered from the frame assembly.

Abstract: A track shelving system comprising a frame having vertical posts and horizontal beams extending between the posts, a support assembly comprising brackets connected to the beams and tracks, with each of the tracks being connected to at least two of the brackets, and a shelving assembly comprising a pair of vertical walls, a top wall, and horizontal shelves removably attached to the vertical walls. Each of the horizontal shelves is able to be positioned in a plurality of vertical positions to the vertical walls. The top wall is connected to top edges of the vertical walls. The shelving assembly includes a pair of rods connected to the top wall by straps. The pair of rods are configured to be moved along the tracks to allow the shelving assembly to be moved to a selected horizontal position.

Abstract: To be able to connect and mount a rack mount device having a rack loaded device loaded thereon to a rack easily, and to be able to release and detach the rack mount device easily from the outside of the rack. The rack mount device has a pair of mount kits for holding the rack loaded device arranged to oppose to each other, which are detachably connected to four mount angles configuring the rack. Each mount kit is configured with a front mount and a rear mount, which are freely slidable with respect to each other in the longitudinal directions thereof. A kit connecting mechanisms for connecting each mount kit to the mount angles are provided to both ends of the mount kits, respectively. A connection releasing mechanism for releasing the connection between the mount kits and the mount angles is provided to each of the kit connecting mechanisms.

Abstract: An adjustable shelving assembly is provided with four corner members of L-shaped cross section, either half of each corner member including aperture members each including an upper, larger circle and a lower, smaller, vertical hole overlapping the larger circle thereof; at least one group of four interconnecting members each including upper and lower aperture elements and a through hole between the aperture elements, each aperture element including an upper, smaller, vertical hole and a lower, larger circle overlapping the vertical hole thereof; elongated retainers each including two enlargements at both ends respectively, an annular groove adjacent to one enlargement, and an annular shoulder between the groove and the other enlargement; lock pins each having a substantial portion fastened in the larger circle of the aperture member and the through hole; and at least one flat shelf each anchored on tops of the interconnecting members.

Abstract: A container having removable side panels and spacer inserts, the spacer inserts disposed within the gap between adjacent side panels, whereby said side panels are raised to remove them from the container and wherein the spacer inserts preclude removal of a lower side panel unless the adjacent upper side panel is raised sufficient distance to remove the spacer insert.

Abstract: A retaining structure includes a bracket, a retaining element, a securing element, a spring and a latching element. The bracket defines a mounting hole. The retaining element defines an opening and having a pin. The securing element is slidably retained to the retaining element. The securing element defines a securing groove, a guiding groove and a sliding groove. The sliding groove has a first end and a second end. The spring connects the retaining element and the securing element. The latching element is latched with the securing element. The latching element including a latching board and a latching post protruding from the latching board.

Abstract: A mounting bracket includes an end plate perpendicularly extending from a side plate and having an elongate hole. A pin assembly includes a pin, a protrusion and a fixing member, wherein the pin is connected to the protrusion and contacts the end plate. The protrusion is located in and movable in the elongate hole. The thickness of the protrusion is larger than that of the end plate. The fixing member includes a head and a shank extending from the head. The shank connects the pin and the protrusion. By this arrangement, the fixing member and the pin clamps the protrusion to be movably engaged with the elongate hole. The pin is adjustably moved in the elongate hole by the protrusion in the elongate hole of the end plate.

Abstract: A coupler for coupling two posts end-to-end has ninety degree flanges and two reverse wrap ends. The coupler is slid one-half way over the ends of one formed post, comprising two flanges, with the reverse wrap holding the post flanges. Another flanged post is inserted into the coupler to engage the end of the first post, the coupler holding the posts end-to-end. An alternate embodiment coupler is disclosed.

Abstract: An equipment enclosure for housing electronic components includes a front assembly having a front frame, the front assembly defining a front of the enclosure, and a rear assembly having a rear frame. The enclosure further includes at least two side brace members, each side brace member having a first end and a second, opposite end. A first connector is configured to releasably connect the first end of one of the side brace members to the front frame. A second connector is configured to releasably connect the second end of the one of the side brace members to the rear frame. Other embodiments and methods are further disclosed.

Abstract: A display unit for displaying materials, such as flooring materials, is provided. The display unit includes a frame having a plurality of spaced apart legs arranged in a common vertical plane, each of the legs having a plurality of vertically spaced slots. The frame also includes a plurality of walls, each having two opposite end portions attached to two adjacent legs and arranged parallel to the common vertical plane. A plurality of horizontal rails having knife brackets affixed to opposite ends thereof is included. The knife brackets each include a plurality of engagement tabs that engage with the slots, and a movable locking device. A plurality of display pages are mounted for pivoting movement between an upper rail and a lower rail of the plurality of horizontal rails.

Abstract: A lightweight cross-beam for a storage rack made of a single sheet of steel with a Z-style cross sectional configuration includes a generally vertical upper wall with upper and lower edges; a generally horizontal support wall extending inwardly from the lower edge of the upper wall; an angled intermediate wall extending downwardly and outwardly from the inner edge of the generally horizontal wall; and a generally vertical lower wall that extends downwardly from the outer edge of the angled wall. The angle between the generally horizontal support wall and the angled wall is about 60°. The upper and lower walls are generally in the same vertical plane. Upper and lower rivets extend outwardly from the upper and lower walls at each end of the cross-beam. The vertical distance between the upper and lower rivets is 3 inches. The length of the cross-beam is at least about 96 inches.

Abstract: A rack for storing elongate core sample boxes is formed from two separate frames each having three upright posts formed of tubular steel and a plurality of steel tubes extending across between the posts and welded to the posts. The frames can be transported in assembled form and then connected across the top and bottom of the uprights by metal bridging members with C-shaped inserts into the ends of the posts. The structure is held together and braced by diagonal braces which attach to tabs on the bridging members by a wedge drive into a slot in the tab.

Abstract: An equipment enclosure for housing electronic components includes a front assembly having a front frame, the front assembly defining a front of the enclosure, and a rear assembly having a rear frame. The enclosure further includes at least two side brace members, each side brace member having a first end and a second, opposite end. A first connector is configured to releasably connect the first end of one of the side brace members to the front frame. A second connector is configured to releasably connect the second end of the one of the side brace members to the rear frame. Other embodiments and methods are further disclosed.

Abstract: A mounting apparatus is provided for mounting a slide rail to a rack post defining a plurality of through holes. The mounting apparatus includes a supporting bracket slidably mounted to the slide rail, and a resilient latch member. The supporting bracket includes an end plate at the front end with two inserting pins extending from a front surface of the end plate and engaged in corresponding through holes of the rack post. The latch member includes a middle plate retained to the supporting bracket, and a latch arm extending forwards. The latch member is operable to be deformed to make the latch arm abut a front surface of the rack post, to prevent the inserting pin from retracting from corresponding through holes.

Abstract: An equipment enclosure for housing electronic components includes a front assembly having a front frame, the front assembly defining a front of the enclosure, and a rear assembly having a rear frame. The enclosure further includes at least two side brace members, each side brace member having a first end and a second, opposite end. A first connector is configured to releasably connect the first end of one of the side brace members to the front frame. A second connector is configured to releasably connect the second end of the one of the side brace members to the rear frame. Other embodiments and methods are further disclosed.

Abstract: A control box arrangement including at least one control box which has a frame constructed from vertical and horizontal frame pieces and which is fitted with, or can be fitted with, mounting parts including mounting rails, for the variable design of the inside of the control box for the division thereof. The frame pieces have rows of mounting holes in a defined pattern. The division of the inside of the control box can be varied by single-component connection pieces for connecting the mounting rails to the frame pieces. The connection pieces include a coupling section which protrudes at a right angle from the connection plane of the associated frame piece when applied. The coupling section has a quadratic or rectangular cross-section and has at least one transversally extending threaded borehole. The four planes of the coupling section are parallel to the vertical plane and the horizontal plane of the control box.

Abstract: A bracket for connecting a slide assembly to a rack having any one of multiple hole standards. The bracket includes a first portion defining a first surface that contacts the rack and a second portion that defines a second surface that contacts the rack. The first portion and the second portion cooperate to capture a portion of the rack therebetween. The bracket further includes a first projection sized and shaped to engage a first rack hole standard and a second projection sized and shaped to engage a second rack hole standard. The bracket may also include additional projections configured to engage additional hole standards.

Abstract: A rack device having a receiver that can be prevented from being separated from a rack post in an incubator. A rack device in which a receiver is mounted between a pair of rack posts to hold a rack on the receiver includes a pair of engaging hooks which are formed in the receiver and a plurality of engaging holes which are formed in both the rack posts and in which both of the engaging hooks of the receiver disengageably engage, respectively. The rack posts are configured to be able to change an interval there between and select a first state in which the engaging hooks can be disengaged from the engaging holes and a second state in which the movement of the receiver is restricted while the engaging hooks be kept to engage in the engaging holes by changing the interval between the rack posts.

Abstract: IMPROVEMENT TO THE METALLIC STRUCTURE FOR MANUFACTURING ELECTRICAL PANELS/CABINETS, enclosing a structure of metallic cross sections (5), with the device for supporting the parts making up the external walls from folded sheets, as well as constituting the device for supporting and mounting the doors with its respective hinges and other accessories, such as: the upper (6) and lower enclosure with the base (7) and other components, being that, still, same structure, although, on the inside, also configures the necessary mounts for distributing and assembling the different electrical and electronic components and devices; in the first construction version, the said structure (5) presented semi-assembled, where four of its uprights or four of its cross sections (P1) are completely free while all the other cross sections are rigidly integrated into two equal rectangular frames (8) which form the two opposite sides of the said structure (5) and therefore at the corner point of the junction of each rectangular frame

Abstract: A bracket includes a planar body portion having an edge and a surface, a flange extending generally perpendicularly from the edge, the flange including a plurality of mounting openings, and at least one finger projecting from the flange and along and spaced from the body portion surface. Also a method of using the bracket and an assembly including the bracket and a rack.

Abstract: A sectional rack, which can be assembled without using fastening elements and tools, includes rectangular vertical posts, foot members connected to lower front and lower rear ends of the vertical posts, hook members hooked to hanging holes provided on lateral faces of the vertical posts, and crossbars mounted to lower and higher positions between two adjacent vertical posts via the hook members. When the hook member is hooked to the hanging holes, an insertion slot is formed between the hook member and the lateral face of the vertical post. The crossbars are respectively formed on a lower portion at each of two lateral ends with an insertion section for firmly downward inserting into two insertion slots formed on two facing lateral faces of two adjacent vertical posts, so that the two vertical posts are supported by the crossbars to stably stand upright.

Abstract: An equipment enclosure for housing electronic components includes a front assembly having a front frame, the front assembly defining a front of the enclosure, and a rear assembly having a rear frame. The enclosure further includes at least two side brace members, each side brace member having a first end and a second, opposite end. A first connector is configured to releasably connect the first end of one of the side brace members to the front frame. A second connector is configured to releasably connect the second end of the one of the side brace members to the rear frame. Other embodiments and methods are further disclosed.

Abstract: A rack rail system engageable with a post of a rack. The rack rail system includes a rail assembly and a flange provided on at least an end of the rail assembly. The flange includes a pin insertable into an aperture of the post when the flange is adjacent to the post. The rack rail system further includes a clamp pivotably connected to the flange and movable from an open position and a closed position. The clamp receives both the post and the flange in the closed position.

Abstract: A cross bar forming a support surface between parallel deck beams of rack-type storage systems to create storage shelves, the cross bars being lockable and readily removable and reusable.

Abstract: A rack for supporting electronic devices and modules with adjustable rails. The rack has a vertical wall with a set of holes at various elevations, each set of holes including at least a proximal hole evenly spaced apart from a distal hole. A longitudinally-extending rail has a set of clips for selectively securing the rail to the vertical wall, wherein the set of clips includes at least a proximal clip selectively receivable in the proximal hole at a selected elevation for supporting a proximal end of the rail and a distal clip selectively receivable in the distal hole at the selected elevation for supporting a distal end of the rail. The system may include a second rail for securing to an opposing vertical wall of the rack to form a shelf or bay for an electronic device. Each rail may be latched in place and can be selectively installed and removed without use of tools.

Abstract: A storage system includes a rear frame, a plurality of divider panels, and a plurality of shelving panels. The divider panels include a first divider panel and a second divider panel, each divider panel having a front vertical bar and a rear vertical bar, each divider panel being removably connected to the rear frame adjacent the rear vertical bar. A plurality of U-shaped connectors are provided in spaced apart manner along the front vertical bars and the rear vertical bars of each divider panel. Each shelving panel has a four-sided configuration that defines four corners, with each corner of each shelving panel fitted inside a U-shaped connector.

Abstract: A rack rail system engageable with a post of a rack. The rack rail system includes a rail assembly and a flange provided on at least an end of the rail assembly. The flange includes a pin insertable into an aperture of the post when the flange is adjacent to the post. The rack rail system further includes a clamp pivotably connected to the flange and movable from an open position and a closed position. The clamp receives both the post and the flange in the closed position.

Abstract: A slide mounting bracket structure includes a main bracket, an auxiliary bracket, a first engaging member, a second engaging member, an actuating element, a linking member and an elastic element. The main bracket is provided with the actuating element and the linking member at its inner side, and the auxiliary bracket is provided with the first engaging member and the second engaging member at its outer side. The actuating element corresponds to the first engaging member. The linking member has a part penetrating the main bracket, and has a support stand corresponding to the second engaging member, which further drags the auxiliary bracket to engage in sliding, and brings a second folded plate to depart from a first folded plate.