U.S. patent application number 10/903691 was filed with the patent office on 2006-02-02 for collapsible play yard.
This patent application is currently assigned to Simplicity, Inc.. Invention is credited to Jerome Drobinski, Kenneth Waldman.
Application Number | 20060021137 10/903691 |
Document ID | / |
Family ID | 35730478 |
Filed Date | 2006-02-02 |
United States Patent
Application |
20060021137 |
Kind Code |
A1 |
Waldman; Kenneth ; et
al. |
February 2, 2006 |
Collapsible play yard
Abstract
A locking mechanism comprises: a hub movable between a raised
and a lowered position and a pair of structures, pivotally mounted
to a common bracket. Sector gears engage each other rotate in
unison. A locking assembly mounted upon the common bracket moves
between a locked position preventing rotation of said structures
and a released position allows rotating of said structures. At
least two rods are pivotally joined to one of said structures. When
the lock button is unlocked, and the hub is lifted, the rods are
moved together to be substantially parallel, and when the hub is
lowered, the gears rotate and the rods are pushed away from each
other until the rods lie substantially in a common plane, enabling,
the locking button to be moved to its locked position to prevent
movement of the hub from the lowered position.
Inventors: |
Waldman; Kenneth; (Reading,
PA) ; Drobinski; Jerome; (Reading, PA) |
Correspondence
Address: |
VOLPE AND KOENIG, P.C.
UNITED PLAZA, SUITE 1600
30 SOUTH 17TH STREET
PHILADELPHIA
PA
19103
US
|
Assignee: |
Simplicity, Inc.
Reading
PA
|
Family ID: |
35730478 |
Appl. No.: |
10/903691 |
Filed: |
July 30, 2004 |
Current U.S.
Class: |
5/99.1 |
Current CPC
Class: |
A47D 13/063
20130101 |
Class at
Publication: |
005/099.1 |
International
Class: |
A47D 7/00 20060101
A47D007/00 |
Claims
1. A locking mechanism for foldable enclosure, comprising: a) a hub
movable between a raised position and a lowered position,
comprising: i) a pair of structures, each pivotally mounted to a
common bracket wherein sector gears of each structure engage each
other causing the structures to rotate in unison about their
respective axes; and ii) a locking assembly movably mounted upon
the common bracket between a locked position that prevents rotation
of said structures about their respective axes and an unlocked
position that allows rotation of said structures about their
respective axes; iii) at least two rods each pivotally joined to an
associated one of said structures; b) wherein when a button of the
locking assembly is operated to move the locking assembly to the
unlocked position, the structures are released, enabling the hub to
be lifted toward the raised position, and outer ends of the rods to
move together so as to be substantially parallel, and when the hub,
when unlocked, is pushed toward the lowered position from the
raised position, said structures rotate about their axes and the
outer ends of the rods are pushed away from each other until the
rods lie substantially in a common plane; and c) wherein when the
rods lie in said common plane, the locking button is moved to its
locked position which prevents accidental movement of the hub from
the lowered position to the raised position.
2. The locking mechanism of claim 1 further comprising: d) an upper
frame having an open position wherein the upper frame forms a rigid
perimeter around a first area and a collapsed position wherein the
upper frame forms a perimeter around a second area; e) vertical
rails joining the upper frame and the rods; and f) a flexible
enclosure joined to the upper frame and vertical rails; g) wherein
when the hub is in the lowered position and the upper frame is in
the open position, the flexible enclosure forms a flexible wall and
floor that encloses and defines a volume with an open top.
3. The locking mechanism of claim 1 further comprising a mattress
that rests on the rods when the hub is in the lowered position.
4. The locking mechanism of claim 1 wherein the locking button is
rotatable between the unlocked position and the locked position in
which a tab on the locking button engages first shoulders on each
of said structures to retain said tab in a locked position.
5. The locking mechanism of claim 1 wherein the locking button is
rotatable between the unlocked position and the locked position in
which a tab on the locking button engages second shoulders on each
of said structures to retain said structures in a locked
position.
6. The locking mechanism of claim 1 wherein the hub further
comprises a foot that engages a planar surface when the center hub
is in the lowered position.
7. The locking mechanism of claim 6 further comprising a plurality
of feet connected to the rods that engage a planar surface when the
center hub is in the lowered position.
8. The locking mechanism of claim 2 wherein the upper frame further
comprises four collapsible sides, each side including two upper
frame rods hingedly joined at one end to an upper corner piece and
hingedly joined at an opposite end to a releasable locking
mechanism that releaseably secures the two upper frame rods so that
the two upper frame rods are aligned along a substantially straight
line.
9. The locking mechanism of claim 8 wherein when each of the two
upper frame rods on each of the four collapsible sides is aligned
along its respective straight line, the upper frame is in the open
position.
10. The locking mechanism of claim 8 wherein the relasable locking
mechanism comprises a means for releasably locking the two frame
rods.
11. The locking mechanism of claim 2 wherein the upper frame has
four upper corner members that form substantially square corners
for the upper frame when the upper frame is in the open
position.
12. The locking mechanism of claim 1 wherein the rods are hingedly
connected at their second end to lower corner members that form
substantially square corners when the hub is in the lowered
position.
13. The locking mechanism of claim 1 further including base support
rods rotatably joined to the rods at a first end thereof and a
supplemental foot at a second end thereof.
14. A center hub for a collapsible play yard comprising: a) a pair
of geared structures, each pivotally mounted on a common support
member and spaced apart so that the geared structures engage each
other; and b) a locking button attached to the center piece movable
between a locked position that prevents rotation of the toothed
structures about their axes and a released position that allows
rotation of the geared structures.
15. An upper rail of a play yard comprising two upper frame rods
hingedly joined at one end to an upper corner piece and hingedly
joined at an opposite end to a releasable locking mechanism that
releasably secures the two frame rods so that the two frame rods
are aligned along a substantially straight line, the locking
mechanism comprising a spring-biased button attached to a wedge
that engages cutouts in the opposite ends of the upper frame
rods.
16. The upper rail of claim 15 wherein the wedge has a groove
therein and the cutout has a protrusion thereon, wherein the
protrusion and the groove matingly engage to prevent disengagement
of the cutout and wedge.
17. The upper rail of claim 15 wherein raising the locking
mechanism disengages the protrusion from the groove, thus allowing
the cutout and wedge to also disengage.
18. An upper corner piece for a play yard comprising a slot for
receiving a tapered end of a support rail and a pivot point around
which said rail rotates within said slot.
19. A gear mechanism for a play yard comprising i) a pair of
structures, each pivotally mounted to a common bracket wherein
sector gears of each structure engage each other causing the
structures to rotate in unison about their respective axes; and b)
wherein when the hub is lifted toward the raised position, the
structures rotate about their axes and each sector gear engages the
other.
20. A gear mechanism for a play yard comprising i) a pair of
structures, each rotatably mounted upon pivots extending through a
common bracket wherein two spaced apart pairs of sector gears of
each structure engage each other causing the structures to rotate
in unison about their respective axes; and b) wherein when the hub
is lifted toward the raised position, the structures rotate about
their axes and each sector gear engages the other.
21. A foldable enclosure, comprising: a) a hub movable between a
raised position and a lowered position, comprising: i) a pair of
structures, each rotatably mounted upon pivots extending through a
common bracket wherein sector gears of each structure engage each
other causing the structures to rotate in unison about their
respective axes; and ii) a means for locking mounted upon the
common bracket that moves between a locked position that prevents
rotation of said structures about their respective axes and a
released position that allows rotation of said structures their
respective axes; iii) at least two rods each pivotally joined to an
associated one of said structures; b) an upper frame having an open
position wherein the upper frame forms a rigid perimeter around a
first area and a collapsed position wherein the upper frame forms a
perimeter around a second area; c) vertical rails joining the upper
frame and the rods; and d) a flexible enclosure joined to the upper
frame and vertical rails; e) wherein when the lock button is moved
to an upper unlocked position, and the hub is lifted toward the
raised position, the rods are moved together to be substantially
parallel, and when the hub is pushed into the lowered position from
the raised position, the toothed structures rotate about their axes
and the rods are pushed away from each other until the rods are
substantially in planar alignment; and f) wherein when the rods are
in planar alignment, the locking button can be moved to its locked
position which prevents accidental movement of the hub from the
lowered position to the raised position. g) wherein when the hub is
in the lowered position and the upper frame is in the open
position, the flexible enclosure forms a flexible wall and floor
that encloses and defines a volume with an open top.
22. A hub assembly for selectively erecting and collapsing a
structure for enclosing a child comprising: a common member having
a grip for lifting and lowering the common member; first and second
geared members pivotally mounted to said common member so that said
gears meshingly engage one another; each gear member respectively
pivotally supporting one of first and second pairs of support rods
whereby, when the hub assembly is lifted, free ends of said first
and second pairs of support rods move toward one another through
substantially equal angles due to the meshing engagement of said
first and second geared members.
23. The assembly of claim 22 wherein, when said common member is
lowered, the first and second pairs of support rods move away from
one another and lie in a common plane.
24. A hub assembly for selectively erecting and collapsing a
structure for enclosing a child, comprising: a common member having
a grip for lifting and lowering the common member; a pair of
rotatable members pivotally mounted to said common member; each
rotatable member respectively pivotally supporting first and second
pairs of support rods; said rotatable members each further having a
blocking shoulder and a clearance shoulder; said blocking shoulders
diagonally aligned and with one another and said clearance
shoulders being diagonally aligned with one another; and a locking
tab rotatably mounted upon said common member and being normally
urged in a first direction by a biasing force causing opposing
sides of said locking tab to engage said tab locking shoulders when
said common member is lowered to retain said tab in a locked
position; and said tab in the locked position engaging said
blocking shoulders to prevent said hub assembly from being
lifted.
25. The hub assembly of claim 24 wherein said common member is
unlocked by rotating said locking tab in a second direction against
said biasing force enabling said opposing sides of said locking tab
to move away from said locking shoulders to thereby release said
common member.
26. A hub assembly for selectively erecting and collapsing a
structure for enclosing a child comprising: a common member having
a grip for lifting and lowering the common member; first and second
gear members pivotally mounted upon said common member; each gear
member having a pair of spaced apart gears to provide a gap
therebetween; each gear of one of the gear members meshing with an
associated gear of the other one of said gear members; each gear
member respectively pivotally supporting one first and second pairs
of support rods whereby, when the hub assembly is lifted, free ends
of first and second pairs of support rods move toward one another
through substantially equal angles due to the meshing engagement of
said first and second geared members; each first gear having a
notched portion forming a transversely aligned tab locking shoulder
and a blocking shoulder; each second gear having a notched portion
forming a transversely aligned tab shoulder and a blocking
shoulder; and a locking tab rotatably mounted upon said common
member and being normally urged in a first direction by a biasing
force causing opposing sides of said locking tab to engage said tab
locking shoulders when said common member is lowered to retain said
tab in a locked position; and said tab in the locked position
engaging said blocking shoulders to prevent said hub assembly from
being lifted.
27. A hub assembly for selectively erecting and collapsing a
structure comprising: a common member having a grip for lifting and
lowering the common member; first and second geared members
pivotally mounted upon said common member so that said gears
meshingly engage one another; each gear member respectively
pivotally supporting one first and second pairs of support rods
whereby, when the hub assembly is lifted free ends of said first
and second pairs of support rods move toward one another at a
substantially equal amounts due to the meshing engagement of said
first and second geared members.
28. A hub assembly for selectively erecting and collapsing a
structure for enclosing a child comprising: a common member having
a grip for lifting and lowering the common member; first and second
geared members pivotally mounted upon said common member so that
said gears meshingly engage one another; each gear member
respectively pivotally supporting one first and second pairs of
support rods whereby, when the hub assembly is lifted free ends of
said first and second pairs of support rods move toward one another
at a substantially equal amounts due to the meshing engagement of
said first and second geared members.
29. A method for operating a hub assembly of a playard comprised of
first and second gear members each comprised of a first and second
spaced apart gears pivotally mounted to a common support; The first
and second gears of the first member respectively meshing with a
first and second gear of said second member; each first gear having
a notch defining first and second transversely aligned gear and tab
locking surfaces and each second gear having transversely aligned
gear locking and tab clearance surfaces; and a locking tab
rotatably mounted on said support, said method comprising; lowering
the hub assembly to a first position to move the tab clear of said
gear locking and tab clearance surfaces; and rotating said tab in a
first direction to engage said tab locking surfaces and thereby
prevent said tab from further rotation in said first direction,
whereby said tab engages the gear blocking surfaces of said gear
members to prevent lifting of said hub assembly.
30. The method of claim 29 further comprising; rotating said tab in
a second direction opposite said first direction, said tab being
free to rotate in said second direction past said tab clearance
surfaces and is moved to a position spaced from said first and
second gears of said first and second members; and lifting said hub
assembly to rotate said gear members to a collapsed position.
Description
FIELD OF INVENTION
[0001] The field of the invention generally is collapsible play
yards or playpens and more particularly to releasable locking
mechanisms for such collapsible devices.
BACKGROUND
[0002] A collapsible play yard provides a portable but stable
structure in which a small child can play and sleep. The essential
features for such a structure is that it be (1) lightweight enough
to carry by one person, (2) easy to set up, and (3) stable enough
to safely support the child. An example of a portable play yard is
shown in U.S. Pat. No. 4,811,437 to Dillner et al.
[0003] The Dillner play yard uses a center hub about which the
uprights of the play yard are pivoted. The hub employed in the
Dillner play yard is a complex device and the need exists for a
simpler center hub design.
[0004] Similarly, Dillner provides a play yard having upper rails
comprised of several moving parts and a need exists for a simpler
upper rail design.
SUMMARY
[0005] The present invention is characterized by a locking
mechanism for a foldable enclosure, which comprises: a) a hub
movable between a raised position and a lowered position,
comprising i) a pair of structures, each rotatably mounted upon
pivots extending through a common bracket wherein sector gears of
each structure meshingly engage each other causing the structures
to rotate in unison about their respective pivots; and ii) a
locking assembly movably mounted upon the common bracket between a
locked position that prevents rotation of said structures about
their respective axes and a released position that allows rotation
of said structures their respective axes; and iii) at least two
rods each pivotally joined to an associated one of said structures.
When a lock button of the locking mechanism is moved to an unlocked
position, the hub is free to be lifted toward the raised position,
whereby the rods are moved together to be aligned substantially in
parallel. When the hub is pushed into the lowered position from the
raised position, the cooperating structures rotate about their
pivots whereby the rods are moved away from each other until the
rods lie substantially in a common plane, which constitutes the
erected position. When the rods reach the erected position, the
locking button is automatically moved to its locked position which
prevents accidental movement of the hub from the lowered position
(wherein the play yard is erected) to the raised position (wherein
the play yard is collapsed).
BRIEF DESCRIPTION OF THE DRAWING(S)
[0006] FIG. 1 is an isometric view of the erected play yard.
[0007] FIG. 2 is an isometric view of the collapsed play yard.
[0008] FIGS. 3, 3a, and 3b are isometric views that illustrate the
sequence of moving the frame between the erected and the collapsed
position in FIG. 3b.
[0009] FIG. 4 is a side elevation view of the frame of FIG. 3.
[0010] FIG. 5 is a fragmentary view showing the center hub of FIG.
3 in greater detail.
[0011] FIG. 6 is a side elevational view of the center hub of FIG.
5.
[0012] FIG. 7 is a cross section of the center hub looking in the
direction of arrows 7-7 of FIG. 6.
[0013] FIG. 8 is a cross section of the center hub of FIG. 6
looking in the direction of arrows 8-8 of FIG. 7.
[0014] FIG. 9 is an enlarged cross section of the center hub
looking in the direction of arrows 9-9 of FIG. 8.
[0015] FIG. 10 is an isometric fragmentary view illustrating the
center hub in a collapsed condition.
[0016] FIG. 11 is a cross section of the center hub looking in the
direction of arrows 11-11 of FIG. 10.
[0017] FIG. 12 is a cross section of the center hub looking in the
direction of arrows 12-12 of FIG. 11.
[0018] FIG. 13 is an exploded view of the center hub, and FIG. 13a
is an isolated view of the centerpiece of the hub of FIG. 13.
[0019] FIG. 14 illustrates a locking mechanism for locking the
rails of the play yard of the present invention.
[0020] FIG. 15 is a cross section in the direction of arrows 15-15
of FIG. 14.
[0021] FIG. 16 is a cross section in the direction of arrows 16-16
of FIG. 15.
[0022] FIG. 17 illustrates the release button of the locking
mechanism of FIG. 14.
[0023] FIG. 18 is a cross section in the direction of the arrows
18-18 of FIG. 17.
[0024] FIG. 19 is a cross section in the direction of arrows 19-19
of FIG. 18.
[0025] FIG. 20 is an exploded view of the locking mechanism of FIG.
17 and FIG. 20a is a fragmentary view of the interior of the
bracket in FIG. 20.
[0026] FIG. 21 is an exploded view of an upper corner assembly for
the play yard of the present invention.
[0027] FIG. 22 is a cross section in the direction of arrows 22-22
of FIG. 21.
[0028] FIG. 23 illustrates a lower corner assembly for the play
yard of the present invention.
[0029] FIG. 24 is a cross section in the direction of arrows of
24-24 of FIG. 23.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT(S)
[0030] FIG. 1 shows a fully assembled and erected play yard 10,
which has a flexible enclosure 14 that covers a foldable frame 20
formed of rigid components (shown in FIGS. 2 and 3). The enclosure
14 is mounted upon the frame 20 by means of extending upper
horizontal rails 22 through hollow horizontal sleeves 16 and also
extending vertical rails 24 through vertical sleeves 17. A
removable mattress floor 18, placed upon a floor of the enclosure
14 provides a soft surface for child to sleep or play on.
[0031] FIG. 2 shows the play yard 10' folded onto itself and
enclosed within the folded mattress 18'. Edge 18a' has strips which
may be Velcro.RTM. strips that cooperate with complementary
Velcro.RTM. pieces on end 18b'. FIGS. 3, 3a, and 3b show the steps
in folding the frame 20. For purposes of simplicity, FIGS. 3, 3a,
and 3b omit the flexible enclosure 12 and mattress floor 18.
[0032] Starting from the fully erected frame shown in FIG. 3, the
frame 20 is collapsed onto itself as shown in FIG. 3b by releasing
locking mechanisms 200 and unlocking and raising the center hub 50.
The releasable locking mechanisms 200 are each joined to a
cooperating pair of upper frame rods 28, 28. The upper frame rods
28 are each hingedly joined at an inner end to an associated
locking mechanism 200 and at an outer end to an arm of an
associated upper corner piece 30.
[0033] Once the releasable center hub 50 and locking mechanisms 200
are unlocked, raising the center hub 50 draws the four base frame
rods 32 upward. The base frame rods are each pivotally mounted at
one end to an associated structure 52, 52 forming part of the
center hub 50, and at the other end to an associated one of the
lower corner pieces 34. As the base frame rods 32 are drawn upward
(FIG. 3a), the vertical rails 18 draw inward towards the rising hub
50, and the releasable locking mechanisms 200 move downward.
[0034] FIG. 3b shows the hub 50 raised to its lifted position in
which the frame 20' is folded onto itself and is thus fully
collapsed for ease of storage/transport. In this position, the
vertical rails 18, upper frame rods 28, and base frame rods 32 are
substantially parallel to one another.
[0035] FIG. 3 also shows optional lower support rods 36 that are
pivotally mounted to brackets 37 which, in turn, are joined to the
base frame rods 32 and have their inner ends pivotally mounted to
supplemental feet 38. Feet 38 are optionally mounted to an
associated pair of lower support rods 36 and have base portions 38a
that provide additional support for the floor of the play yard. The
base portions 38a of feet 38, the bottom of bracket 56 and the
bottoms of lower corner pieces 34 are arranged to engage a planar
floor or other supporting surface to stably support the
playard.
[0036] FIGS. 5-13 show a more detailed view of the center hub 50;
of those, FIG. 13 shows the component parts of the hub 50 most
clearly. The hub 50 comprises a pair of sector gear structures 52,
a central piece 54, bracket 56 for supporting piece 54 and
structures 52, and a movably mounted locking button assembly 58.
Pivot pins 66 secure the structures 52 to the bracket 56 and
central piece 54. Each structure 52 rotates about its associated
pivot pin; as the structures rotate, teeth 62 on each of the sector
gear structures 52 meshingly engage one another, to provide a
smooth and yet positive rotation of the structures 52 that raise
and lower the hub 50, assuring that the rods simultaneously swing
through like angles when raised/lowered.
[0037] Structures 52 each have an integral hollow support arm 64
for receiving overlapping ends of an associated pair of base frame
rods 32. The ends of rods 32 each have a cutout 32a so that they
closely overlap one another and can pivot independent of to one
another when held to an associated hollow arm 64 by pivot pin 60.
When the center hub 50 is pulled upward in the direction of arrows,
the vertical rails 18 are drawn inward due to movement of the ends
of base frame rods 32, mounted to lower brackets 34, which move
towards each other.
[0038] Each structure 52 is comprised of a pair of spaced apart
gear sectors 53a, 53b. Sector gears 53a, 53a of the structures 52
are diagonally opposed to one another and gear sectors 53b, 53b are
likewise diagonally opposed to one another. Gear sectors 53a, 53a
each have a shoulder 79 and the gear sectors 53b each have a
shoulder 78-78. The shoulders 78-78 are each closer to a vertical
axis which coincides with arrow A in FIG. 13 such that the
shoulders 78, 78 are each closer to said central axis. Diagonally
aligned sector gears 53a, 53a mesh with an associated diagonally
aligned sector gear 53b, 53b.
[0039] The locking member 58 is held against axial movement within
the central piece 54 by bolt 68 and nut 70 while being capable of
rotating about the vertical axis. A tab 72 is integrally joined to
locking member 58. Distance D1 between ends 72a-72b is greater than
the distance D2 between ends 72c-72d. Tab 72 is positioned beneath
side guides 74, 74. The opposite ends 72c, 72d of tab 72 are
engaged by shoulders 78-78 when the hub 50 is lowered to the
erected position to prevent hub 50 from being accidentally unlocked
and to thereby secure the locking button 58 in a locked position
(shown in FIGS. 5-9). A torsion spring 76 biases the locking member
58 to rotate in the counter-clockwise direction shown by arrow B to
move the tab 72 to the locked position when the hub is in the
erected position. Note that the shoulders 79-79 provide sufficient
clearance to permit the tab to move to the locked position.
[0040] With the hub 50 in the lowered position, the spring-biased
tab 72 rotates counter-clockwise until ends 72a, 72b each engage an
associated shoulder 78, 78. Once opposing surfaces 72c, 72d of tab
72 each engage an associated shoulder 78, the gear structures 52
cannot rotate in either direction about pins 66 because tab 72 is
prevented from rotating by shoulders 78, 78, retaining the tab in a
locked position. This is best seen in FIG. 6. The locking surfaces
78a, 78a, 79a, 79a of the gears 53a, 53a, 53b, 53b, abut the
underside 72c of tab 72 preventing the hub assembly 50 from being
lifted. The underside of bracket 56 rests in a supporting surface
when the play yard is fully erected (see FIG. 4).
[0041] To release the gear structures 52 so they can rotate, the
locking member is turned clockwise, preferably by gripping curved
wire handle 80. The gear sector structures 52 include diagonally
opposed clearance shoulders 79, 79 that provide sufficient
clearance for tab 72, allowing the tab 72 to rotate in the
clockwise direction. When the tab 72 is so rotated, opposite ends
72c, 72d of tab 72 each enter into one of the gap spaces 82 between
the opposing pairs of gear sectors wheels 53a-53b. Once the ends
72c, 72d of tab 72 each enter into one of the gap spaces 82, the
blocking surfaces 79a, 79a, 78a, 78a are clear of tab 72, enabling
structures 52, 52 to rotate freely about their associated pivots 66
allowing hub 50 to be lifted to its raised position shown in FIGS.
10-12.
[0042] As is best seen in FIG. 12, although the tab 72 is urged
counter-clockwise because of the spring bias, the tab 72 is
prevented from rotating by the interior sidewalls of the gear
sectors 53a, 53a and thus the tab is retained within the gap 82.
Upon lowering to the erected position, tab 72 is clear of the
shoulders 79, 79 as well as surfaces 78a, 78a, 79a, 79a (see FIG.
3), enabling the spring 76 to urge the tab 72 toward the locked
position shown in FIGS. 5-9 without the need for manually rotating
the locking button 58 into the locked position.
[0043] FIGS. 14-20 show one of the upper horizontal rail locking
mechanisms 200. FIGS. 14-16 show the locking mechanism 200 in its
locked position, while FIGS. 17-19 show the unlocked position.
[0044] The locking mechanism 200 comprises mounting bracket 202, a
locking wedge 204, a locking spring 206, a push button 208, and a
cover 210. The bracket 202 optionally has a pin 212 and a
spacer/bushing 214 that provide structural support: the bushing 214
fills the gap between opposing walls W1-W2 of bracket 202, and thus
inhibits their movement towards or away from each other when under
stress.
[0045] The push button 208 and locking wedge 204 engage one another
in a threaded, snap-fit, or other secure arrangement. The arm 205
of wedge 204 extends through spring 206, which spring has one end
206a which presses against the push button 208 and an end 206b
secured to the projection 203 of bracket of 202. When assembled as
shown in FIG. 15, the spring 206 biases the push button 208 in the
direction of arrow C and away from bracket 202. This bias force
also urges the wedge portion 207 of the locking wedge 204 in the
direction of arrow C. Depressing the push button 208 against the
force of spring 206, compresses the spring 206 and drives the wedge
portion 207 into the hollow cover 210 attached to the bracket 202,
as shown in FIG. 18.
[0046] In the locked position (FIGS. 14-17), the wedge portion 207
engages inserts 29 provided in upper frame rails 28. Inserts 29 and
rails 28 are pivotally mounted to bracket 202 by a pin 216 which
prevents inserts 29 from moving along their axes and further
prevents inserts 29 from rotation about their axes. The inserts 29
each have a cutout 218 that engages an associated end of the wedge
portion 207 to achieve this locked position. To prevent inadvertent
unlocking, the cutouts 218 each preferably have a small integral
protrusion 220 that engages an associated recess 222 in wedge
207.
[0047] To unlock the upper horizontal rails for folding, the
protrusion 220 and the recess 222 must first be disengaged so that
the push button 208 can be depressed. Prior to this disengagement,
the push button 208 cannot be depressed because of the engagement
of the protrusion 220 and recess 222. In practice, this
disengagement is accomplished by lifting the bracket 202 slightly,
which swings each protrusion 220 upward and away from its
associated recess 222. To unlock the mechanism 200, the push button
208 is pressed in to by a distance sufficient to assure that the
wedge 207 is clear of the path of movement of the cutout 218 as
each rod 28 rotates about its associated pin 216.
[0048] FIGS. 21 and 22 show an upper corner piece 30 that engages
tapered outer ends 302 of associated upper frame rods 28. Each rod
28 fits into an associated slot 30b and rotates about a pin 304
extending through opening 307 each in arm 302 and openings 308 in
corner piece 30. Corner piece 30 minimizes the possibility of
trapping a finger in the corner piece 30, by using the narrow
tapered end 302 and cooperating narrow slot 306.
[0049] FIGS. 23 and 24 show one of the lower corner pieces 34. The
lower support rod 32 rotates about pivot pin 400 within the opening
402 within the lower corner piece 34. It should be noted that the
tapered end/narrow slot design for the upper corner piece may also
be incorporated into the lower corner piece 34.
[0050] Vertical arm 24 is force-fitted into bore 403 of corner
piece 34. Arm 24 has an integral tab 24a which is normally biased
in an outward radical direction and which snap-fits against an
upper edge 404a in opening 404 in corner piece 34 when the rod 24
is pushed into bore 403 by an amount sufficient to clear edge 404a
of opening 404. Rod 24 may be removed from lower corner piece 34 by
pressing tab 24a inwardly sufficient to clear edge 404a. Foot 405
is preferably provided with a "tread" to provide a non-slip grip
with a surface supporting the play yard.
* * * * *