Patent Publication Number: US-8991920-B2

Title: Infant bouncer

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This applications claims priority to U.S. Provisional Application No. 61/601,263 filed on 21 Feb. 2012, the disclosure of which is incorporated herein, in its entirety, by this reference. 
    
    
     TECHNICAL FIELD 
     The present disclosed subject matter relates to infant bouncers and more particularly the disclosed subject matter is concerned with a foldable infant bouncer. 
     The term bouncer as used herein the specification and claims denotes an infant seating device, often referred to also as an infant seat, rocker, etc. 
     BACKGROUND 
     Infant support seats are well known and among those are bouncers, configured for supporting an infant at a reclining or upright position, or at intermediate positions, whilst capable of rocking/bouncing for imparting a soothing effect to the infant. 
     One example is disclosed in U.S. Patent Application Publication No. 20040217643 relating to an infant seat, and in particular, to an infant seat that provides a stable, enhanced seating position for an infant and includes a sensory stimulus unit with a slide switch that, when actuated, effectuates a change in visual appearance of the stimulus unit and a corresponding change in the sensory output. 
     Another example is disclosed in U.S. Patent Application Publication No. 20120235450, directed to an infant seat comprising an upper torso support, a lower torso support pivotally articulated to the upper torso support and a seat supporting structure; at least one of the upper torso support or the lower torso support is pivotally articulated to the seat supporting structure, the seat further comprising a converting mechanism for converting the seat between at least an angular position in which the upper torso support is inclined with respect to the lower torso support, and a planar position in which the upper torso support and the lower torso support are substantially co-planar. 
     SUMMARY 
     It is an object of the present disclosed subject matter to provide a sturdy and firm, yet light weight infant bouncer, and configured for easy folding into a compact sized collapsed position, however easily deployable into its operative seating position. 
     According to the disclosed subject matter there is provided a collapsible infant bouncer comprising support assembly configured with a pair of intersecting support rods pivotally articulated to one another, each support rod configured with at least a top link and a bottom link foldable about a folding joint, and a flexible seating member mounted on the support assembly. 
     The bouncer is configurable between an open position at which the top link of the support rods are retained at an intersecting, X-like configuration, and the top link and the bottom link of each support rod are substantially coextensive, and a collapsed position at which the top links are folded over the bottom links, and the bottom link of the support rods are adjoined and substantially parallel disposed. 
     According to one particular configuration each of the support rods has a J-like shape, and wherein the bottom link is substantially U-like shaped. 
     Any one or more of the following features, designs and configurations can be incorporated in the infant bouncer according to the present disclosed subject matter, independently or in combinations thereof:
         The free ends of the support rods serve for mounting thereon the flexible seating member, wherein at the open position at least portions of the flexible seating member are stretched so as to assume a seating shape, configured for comfortably seating an infant therein, wherein at the collapsed position, the seating member folds to occupy minimal space;   A top portion of the seating member is secured over a free top end of the top links of the support rods, and a bottom portion of the seating member is secured over a free bottom end of the bottom links of the support rods;   The seating member can be detachably attachable to the support assembly;   The seating member can be made of pliable sheet material;   The seating member can be a non-stretchable sheet material;   The seating member can be configured for use at either a first or a second face thereof;   The seating member can be configured with receiving pockets for mounting over the free ends;   The seating member can be configured with a securing arrangement such as a harness or safety straps for securing an infant to the bouncer;   The support rods can be made of a rigid light weight material, e.g. metal, reinforced plastic material, carbon, etc.;   A joint end of one of the top link and the bottom link of a support rod can be fixedly secured to the folding joint, and a neighboring joint end of another one of the top link and the bottom link is pivotally secured to the folding joint;   A pivoting one of the top link and the bottom link can be configured for snap locking at the folding joint in either or both of an open position in which the top link and the bottom link substantially coextend, and the collapsed position;   Folding joint can be configured with a safety snap to prevent unintended collapsing of the links;   The folding joint can be configured with a gliding surface for smooth displacement of a locking mechanism of the one of the top link and the bottom link over a wall surface of the folding joint;   The folding joint can be configured for locking arresting at the open position by a normally locked arresting mechanism, such that when deployed at the fully open position the top link and the bottom link become a rigid element&#39; substantially continuous with one another;   The arresting mechanism can be a configured as a hooked member articulated with one of the top link and the bottom link, and configured for arresting a respective recess configured at the other one of the top link and the bottom link;   According to one particular design, the top link is fixedly articulated to the folding joint and the bottom link is pivotally articulated to the folding joint. According to yet a particular arrangement, the bottom link is configured with an arresting recess for arresting engagement with a pivoting hook member associated with the top link;   The pivoting hook member is normally biased into a normally locked position;   An unlocking mechanism is configured at a pivot location of the two respective top links, said unlocking mechanism configured for simultaneous manipulating of the arresting mechanism at the folding joints;   The unlocking mechanism is configured with a biasing arrangement for biasing the pivoting hook members into their respective locked/arresting position;   Displacement of the pivoting hook members by the unlocking mechanism is facilitated by a cord member articulated to the hook members and to the unlocking mechanism, whereby manipulating the unlocking mechanism entails temporarily unlocking of the hook members so as to disengage from the respective arresting recess;   Manipulating the unlocking mechanism can be by rotating same to pull a cord/cable, said cord extending through at least a portion of the top links;   The unlocking mechanism is configured with a spring for biasing the pivoting hook members into their locked position;   The pivoting hook members and/or the respective arresting recess are configured with gliding surfaces to facilitate smooth displacement of the hook members into arresting engagement of the arresting recess;   A joint end of both the top link and the bottom link of a support rod can be pivotally secured to the folding joint, displaceable between an open position in which the top link and the bottom link substantially coextend, and the collapsed position;   At least a portion of the bottom link of the support rods can be configured with or made of an elastic material, to thereby facilitate gentle rocking of the bouncer. According to one particular configuration the bouncer is configured with springy supports to thereby facilitate gentle rocking of the bouncer;   A top portion of the top links and a bottom portion of the bottom links can be configured with a seat arresting member for securing the seat member thereto. The seat portion arresting member according to one configuration is a clamp configured for arresting the seat to a respective link portion and according to another configuration the seat arresting member is a fastener for arresting a loop of the seat portion;   Locations of the support rods can be configured for resting over a floor surface are fitted with floor pads. Such floor pads serve as anti-slip and anti-scratch pads;   At the open position of the bouncer the free bottom ends of the bottom links can be extend substantially upright. However said free bottom ends can be configured to project offset from a longitudinal axis of the open bouncer, in an outwards or inwards orientation;   A connecting member extends between a portion of each of the two bottom links, to restrict expansion of the two support rods at the open position of the bouncer;   According to one configuration the connecting member can be a strap of flexible material extending between a bottom portion of the bottom links;   According to another configuration the connecting member can be configured with two or more support links pivotally secured to a bottom location of bottom links and to one another, said support links deployable between a collapsed position at which they at least partially overlap, and an open position at which they substantially coextend;   The support links can be configured with a locking mechanism for arresting the connecting member at the open position, to thereby retain the bouncer at the open position and prevent spontaneous folding thereof;   The locking mechanism can be configured to prevent spontaneous opening of the support links into the deployed, open position;       

    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In order to understand the present disclosed subject matter and to see how it may be carried out in practice, the disclosure will now be described, by way of non-limiting examples only, with reference to the accompanying drawings, in which: 
         FIG. 1  is perspective view of the bouncer at its open position; 
         FIG. 2A  is rear left perspective view of the bouncer at its open position; 
         FIG. 2B  is rear right perspective view of the bouncer at its open position; 
         FIG. 2C  is bottom view of the bouncer at its open position; 
         FIG. 3  is rear right perspective view of the bouncer at a first sequence of folding the bouncer; 
         FIG. 4  is perspective view of the bouncer at its fully folded position; 
         FIG. 5A  is a front view of the support assembly of the bouncer, at the fully open position; 
         FIGS. 5B and 5C  are right and left perspective views, respectively, of the support assembly of  FIG. 5A ; 
         FIG. 6A  is a top view of the support assembly of the bouncer, at a midway collapsed position; 
         FIG. 6B  is a right side perspective view of the support assembly of  FIG. 6A ; 
         FIG. 6C  is a side view of the support assembly illustrating a further sequence of folding; 
         FIG. 6D  is a top view of the support assembly at a semi folded position, with the links extending substantially co-planar; 
         FIG. 7  illustrates the support assembly of the bouncer, at a fully collapsed position; 
         FIG. 8A  illustrates a folding joint of the bouncer, with the articulated links arrested at the fully open position; 
         FIG. 8B  illustrates the folding joint of  FIG. 8A , with the articulated links arrested at the fully folded position; 
         FIG. 8C and 8D  illustrate the folding joint of  FIG. 8A , with the articulated top link at an intermediate, unlocked position; 
         FIGS. 9A and 9B  illustrate a pivotal coupling of a connecting member to the bottom link, at to respective angular positions; 
         FIG. 10A  is a front perspective view of a bouncer according to another example of the present disclosed subject matter, at its open position; 
         FIG. 10B  is a front perspective view of the bouncer of  FIG. 10A ; 
         FIG. 11  is a side view of the bouncer at its closed position; 
         FIG. 12A  is a front perspective view of the support assembly, at the fully open position; 
         FIG. 12B  is a rear perspective view of  FIG. 12A ; 
         FIG. 13A  is a right side, front perspective view of the support assembly, at a first folding position; 
         FIG. 13B  is a left side, front perspective view of the support assembly, at a fully folded/collapsed position; 
         FIG. 13C  is a side view of  FIG. 13A ; 
         FIG. 13D  is a bottom view of  FIG. 13A ; 
         FIG. 14A  is a section along line I-I in  FIG. 12A , illustrating the support links locking mechanism at a locked position; 
         FIG. 14B  illustrates the mechanism of  FIG. 14A  at its unlocked position; 
         FIG. 14C  illustrates the support links at their folded position; 
         FIG. 14D  a section along line II-II in  FIG. 14C ; 
         FIG. 15A  is an exploded isometric rear view of an unlocking mechanism of the bouncer; 
         FIG. 15B  is a rear view, partially assembled, of the unlocking mechanism of  FIG. 15A ; and 
         FIGS. 16A to 16E  are sections through the folding joint, illustrating consecutive steps of unlocking same. 
     
    
    
     DETAILED DESCRIPTION 
     Attention is directed to  FIGS. 1 to 3  of the drawings illustrating a bouncer generally designated  20 , comprising two principal components, namely a support assembly  22  and a seating member  24  mounted over the support structure  22 . 
     In  FIGS. 1 to 3  the bouncer  20  is illustrated at its fully open position, namely at its operative position configured for seating an infant. However, in  FIG. 4  the bouncer  20  is illustrated at its fully collapsed/folded position wherein it occupies only little space rendering it suitable for carrying or stowing. 
     The seating member  24  is made of a flexible material, though non-stretchable material, e.g. fabric, optionally with one or more cushioned (padded) zones, and optionally made of or comprising portions made of so-called breathing fabrics, optionally net-like portions. The shape of the seating member  24  is designed for comfortably seating an infant (not shown), at a safe and comfortable position, supporting its entire body, i.e. head, torso and legs. 
     The seating member  24  can be used with either face facing upwards, i.e. it can be inverted for use with an alternative pattern or in case one face becomes dirty. A rim of the seating member  24  is configured with a reinforcing hem  28 . 
     According to one particular example, and as seen best In  FIG. 2C , a bottom side  30  of the seating member  24  comprises at each of its four corners a receiving pocket  32 , for mounting over a free end of a respective link of the support structure  22 . Also noted, at each respective corner of the seating member  24  there is configured an elastic band  36  for securing the seating member  24  to arresting members, namely knobs  40  fitted at respective ends of links of the support structure  22 . 
     The arrangement is such that the seating member  24  is detachable mounted thereover, in a readily removable fashion. However, the seating member can be configured with a securing arrangement (not shown) such as a harness or safety straps for securing an infant to the bouncer. 
     Turning now also to  FIGS. 5A to 5C , the support structure  22  with the seating member  24  removed. As can be seen, the support structure  22  comprises two support rods  50  each configured as a J-like shaped member and comprising a top link  52  and a U-like bottom link  54  coupled to one another about a folding joint  60  to be discussed hereinafter in further detail. The two support rods  50  are pivotally secured to one another at  62  such that at an open position the top links intersect at an X-like configuration. The support rods  50  are made of a rigid light weight material, e.g. metal, reinforced plastic material, carbon, etc. 
     The support structure is thus configured with two top free ends  66  (of top links  52 ) and two bottom free ends  68  (of bottom links  54 ), said free ends shaped and sized for being received within the receiving pockets  32  of the seating member  24 . 
     As can be seen in the drawings, at the open position of the support structure  22 , the bottom free ends  68  of bottom links  54  extend substantially upright with a somewhat inwards oriented inclination. However, according to other configurations (not shown) the bottom links can extend with a somewhat outwards oriented inclination. 
     In the particular illustrated example, the arrangement is such that the top link  52  is fixedly secured to the folding joint  60 , with the bottom link  54  being pivotally secured thereto. A locking mechanism is provided for arresting the bottom link  54  at the open position, i.e. substantially in continuity with the top link  62 . 
     The seating member  24  and the corresponding free ends  66  and  68  of support rods  50  are shaped and sized such that at the open position the flexible seating member  24  is stretched and assumes a seating shape, configured for comfortably seating an infant therein, and at the collapsed position ( FIG. 4 ), the bouncer is collapsed/folded and the support structure  22  with the articulated seating member  24  fold into a compact size to occupy minimal space. 
     As can be seen, best in  FIGS. 8A to 8D , the folding joint  60  has a portion thereof fixedly attached to an end of the top ling  52  (by rivets  70  or otherwise), and a pivot point at  72  secured to the bottom link  54 . The bottom link  54  is configured at an end portion thereof pivoted to the folding joint  60  with a snap-type locking pin  78 , said locking pin  78  being spring biased to project from the bottom link  54  and configured for snappingly arresting within a locking receptacle  80  at the folding joint  60 . Also noted, the folding joint  60  is configured with a gliding surface  84  to facilitate smooth sliding of the locking pin  78  into the locking receptacle  80 . A release mechanism is provided by way of depression bar/knob  86 , pressing of which entails depression of the locking pin  78  against the biasing spring so as to disengage from the locking receptacle  80 , thereby facilitating folding/collapsing of the support rods  50 . 
     Also seen in the Figures, a connecting member  90  extends between a portion of each of the two bottom links  54 , to restrict expansion of the two support rods  50  at the open position of the bouncer. 
     According to the illustrated configuration, the connecting member  90  is configured with two support links  92  pivotally secured at a bottom location  94  of bottom links  54  and to one another at a pivot point  96 , said support links  92  deployable between a collapsed position at which they at least partially overlap, and an open position at which they substantially coextend. It is appreciated that articulation of the support links  92  to the bottom link  54  at pivot link  94  is of the type facilitating both pivotal displacement of the links  92  about the pivot point  107  (arrow  101  in  FIGS. 9A and 9B ) and rotation of the pivot link  94  about the longitudinal axis of the bottom link  54  (arrow  103  in  FIGS. 9A and 9B ), whereby rotation of the pivot link  94  about the bottom link  54  is restricted by virtue of pin  111  extending from the bottom link  54  and projecting into a recessed opening  113  formed at the pivot link  94 . 
     The support links can be configured with a locking mechanism (not shown) for arresting the connecting member at the open position, to thereby retain the bouncer at the open position and prevent spontaneous folding thereof. Alternatively, as in the illustrated example, the support links  92  assume a locked mechanism position at their fully open position, preventing their collapse. 
     According to another configuration (not illustrated) the connecting member is a strap of flexible material extending between a bottom portion of the bottom links. 
     In order to impart the bouncer  20  with some bouncing elasticity, for a rendering it a soothing effect, a pair of springy supports  98  are attached to the bottom links  54 , to thereby facilitate gentle rocking of the bouncer. 
     A free end of said springy supports  98  and a floor point of contact at the bottom link is configured with a floor pad  100 , e.g. made of rubber material or plastic, serving as an anti-slip and anti-scratch pad. 
     It is however appreciated that rather than supports  98 , other configurations are possible, e.g. a resilient projection extending from or near each of the joints  60  (e.g. articulated to the bottom links  54 ), etc. 
     Folding the bouncer  20  takes place by first collapsing the connecting member  90  by folding the support links  92  such that they substantially overlap one another ( FIGS. 6A and 6B ) whereby the X-shaped structure is collapsed. Then, support rods  50  are collapsed by depressing the depression bar  86 , such that the top links  52  are folded (arrowed line  119  in  FIG. 6C ) over the bottom links  54 , and the bottom links  54  of the support rods  50  are adjoined and substantially parallel disposed ( FIG. 7 ). Deploying the bouncer into its open position takes place in a reverse sequence. 
     Further attention is now directed to  FIGS. 10 to 16 , directed to yet another example of a bouncer according to the present disclosed subject matter. The bouncer  220  is similar to that disclosed in the previous drawings, however with some different configurations associated with the folding/unfolding mechanism. For sake of clarity, like elements are designated with like reference numbers, however shifted by  200 . 
     The bouncer  220  has the same general structure as discussed hereinabove and comprises a support assembly  222  and a seating member  224  (shown only in  FIGS. 10 and 11 ) mounted over the support structure  222 . Configuration and function of the support assembly  222  and the seating member  224  are substantially as discussed above. 
     The support assembly  222  comprises two support rods  250  each configured as a J-like shaped member and comprising a top link  252  and a U-like bottom link  254  coupled to one another about a folding joint  260  to be discussed hereinafter in further detail. The two support rods  50  are pivotally secured to one another at  262  such that at an open position the top links intersect at an X-like configuration. The support rods  250  are made of a rigid, light weight material, e.g. metal, reinforced plastic material, carbon, etc. 
     The support structure  222  further comprises two support links  292  extending adjacent the free ends  268  of the bottom links  254 , said support links  292  bring pivotally articulated to the respective bottom links  254  via a coupler link  293  imparting said support links  292  with pivotal freedom and some tilt freedom as represented by arrows  295  and  297  in the drawings. The two support links  292  are pivotally secured to one another via a locking mechanism  296 . Said support links  292  are deployable between a collapsed position at which they at least partially overlap, and an open position at which they substantially coextend. 
     The two support links  292  on the one hand restrict expansion of the two support rods  250  at the open position of the bouncer and on the other hand retain it fixedly open and prevent spontaneous collapsing. 
     The support structure  250  is thus configured with two top free ends  266  (of top links  522 ) and two bottom free ends  268  (of bottom links  254 ), said free ends configured, according to some examples, with an end piece  265  and are configured for arresting within the receiving pockets of the seating member  224  (not shown), or otherwise, as known per-se. The seating member  224  is further articulated to the support structure  250  by virtue of a plurality of hooks  231  disposed over portions of the links and rods (e.g. seen in  FIG. 14D ) with respective loops formed at the seating member  224  (not seen). 
     As can be seen in the drawings, at the open position of the support structure  222 , the bottom free ends  268  of bottom links  254  extend substantially upright, however with a somewhat outwards oriented inclination. 
     The arrangement is such that the top link  252  is fixedly secured to the folding joint  260  (e.g. by a fastener at  265 ), with the bottom link  254  articulated to a coupler  269  (e.g. by a fastener at  267 ), the later pivotally secured to the joint  260 . 
     The seating member  224  and the corresponding free ends  266  and  268  of support rods  250  are mutually shaped and sized such that at the open position the flexible seating member  224  is substantially stretched and assumes a seating shape, configured for comfortably seating an infant therein, and at the collapsed position ( FIG. 11 ), the bouncer is collapsed/folded and the support structure  222  with the articulated seating member  224  fold into a compact size to occupy minimal space. 
     In order to impart the bouncer  220  with some bouncing elasticity, for a rendering it a soothing effect, a pair of springy supports  298  are attached to the bottom links  254 , to thereby facilitate gentle rocking of the bouncer. 
     A free end of said springy supports  298  and a floor point of contact at the bottom link is configured with a floor pad  300 , e.g. made of rubber material or plastic, serving as an anti-slip and anti-scratch pad. 
     It is however appreciated that rather than supports  298 , other configurations are possible, e.g. a resilient projection extending from or near each of the joints  260  (e.g. articulated to the bottom links  254 ), etc. 
     According to the illustrated example, the bouncer is configured with two unlocking arrangements, whereby collapsing the bouncer  220  requires two unlocking procedures, as will be discussed hereinafter in detail. The unlocking procedures, in the particular example, are performed simultaneously, though in-series operation can be performed as well. 
     As can best be seen in  FIGS. 14A to 14D , a first locking mechanism  296  comprises a housing  348  accommodating a first ring portion  350  integral with and fixed at an end of the right support link designated herein  292 A, and a second ring portion  352  integral with and fixed at an end of the left support link designated herein  292 A. A plunger  356  is retained in the housing and is spring biased by a coiled spring  358  between a normally projecting position ( FIG. 14A ), and a depressed position ( FIGS. 14B and 14D ) against the biasing effect of the spring  358 . A plunger stem  360  is configured at a top end thereof with locking prongs  364 . Both the first ring portion  350  and the second ring portion are configured with axially disposed recesses  370  facing each other and coextending, and further configured for mutual arresting by the locking prongs  364 . 
     The arrangement is such that the locking prongs  364  are normally biased into locking engagement with the axially disposed recesses  370  of the two ring portions  350  and  352 , thereby arresting the at a respective open position ( FIG. 14A ), or at a respective collapsed position ( FIG. 14C ) wherein the two rings are arrested and cannot pivot with respect to one another (whereby the respective right support link  292 A and the left support ling  292 B become arrested at their expanded, open position. However, upon depressing the plunger  356  in direction of arrow  361  against the spring  358 , the locking prongs  364  disengage from the recesses  370 , thereby facilitating pivotal displacement of the two ring portions  350  and  352  with respect to one another and respectively of the right support link  292 A and the left support ling  292 B) into collapsing the bouncer. 
     In a particular example, the two ring portions  350  and  352  are arrested also at the collapsed position of the bouncer, namely where the right support link  292 A are pivoted and extend substantially parallel to one another, e.g. in  FIGS. 14C and 14D ), whereby deploying the bouncer into its open position requires depressing the plunger  356  to disengage pivotal arresting of the two ring portions  350  and  352 , as discussed hereinabove. However, according to a different configuration, deploying the bouncer into its open position merely requires pulling out of the right support link  292 A and the left support ling  292 B. 
     A second locking mechanism is provided for arresting the bottom links  254  at the open position, i.e. substantially in continuity with the top links  252 . For that purpose, there is provided an arresting mechanism generally designated  370  (shown in  FIGS. 16A to 16E ), wherein the folding joint  260  accommodates a locking member  372  pivotally articulated with folding joint  260  at  374  and configured with an arresting hook  375 . The bottom link  254  is fixedly articulated to the coupler  269 , the later configured with an arresting portion  378 . 
     The arrangement being such that the arresting hook  375  is configured for pivotal displacement as represented by arrowed line  380  between an engaged position wherein the arresting hook  375  is arrestingly received within the arresting portion  378  ( FIG. 16A ) corresponding with an open, deployed position of the bouncer  220  wherein the bottom link  254  is locked with at the deployed, open position with respect to the top link  252 , and an un-arrested position corresponding with a folding position of the bouncer ( FIGS. 16B to 16E ), wherein the bottom link  254  is pivoted/folded with respect to the top link  252 . 
     As seen in the drawings, the arresting hook  375  and the respective arresting portion  378  are configured with smooth curved/chamfered gliding surfaces  379  to facilitate smooth displacement of the arresting hook  375  into arresting engagement with the arresting portion  378 . 
     Pivotal displacing the arresting hooks  375  from their arrested position into the unlocked position is facilitated through an unlocking mechanism  386  ( FIGS. 15A and 15B ) mounted at the pivot coupling location  262  of the two top links  252 . The unlocking mechanism  386  comprises a housing composed of two shell members  390 A and  390 B, a rotary manipulating dial  392  articulated to a winder  394  pivotally secured within the housing and spring biased by a tension spring  396 . Two tension cords  398  are secured to the winder  394  and extend into the respective top links  252  extending through the hollow links to the folding joint  260  and fixedly articulated to the hook-like locking member  372  (see also  FIGS. 16A to 16E ). 
     The pivotal locking members  372  are thus normally biased into a normally locked position by spring  396  (secured at one end to the winder  394  and an opposite end to a fixed portion of the housing  390  or to a top link  252 ). 
     The arrangement is such that manipulating the unlocking mechanism  386 , namely rotating the dial  392  in either direction represented by arrowed line  400 , entails simultaneous tensioning of the two cables  398 , resulting in simultaneous pivotal displacement of the locking members  372  into their temporarily unlocked position, facilitating folding of the bouncer  220 , whereby releasing the dial  392  results in spontaneous displacement of the locking members  372  into their snappingly arresting position, readily positioned for arresting and locking engaging with the coupler  269 .