Foldable baby crib

Abstract

The utility model provides a foldable baby crib. The foldable baby crib comprises a fixed seat, a foldable baby crib body and a movable seat. The fixed seat comprises a first connecting groove. One end of the handrail pipe is pivoted to the stand column mechanism, and the other end of the handrail pipe is movably connected to the fixed seat; and the linkage mechanism is constructed to be used for assisting folding and unfolding of the foldable baby crib, one end of the linkage mechanism is pivoted to the stand column mechanism, and the other end of the linkage mechanism is pivoted to the fixed seat. The linkage mechanism comprises a linkage rod and a linkage piece, wherein the linkage rod extends in parallel with the handrail pipe, and the linkage piece extends in a non-parallel mode with the linkage rod.

Description

Technical Field

[0001] This disclosure relates to a collapsible crib, and more specifically, to a collapsible crib that can be operated with one hand. Background Technology

[0002] A crib is used to support an infant or child, providing a space for sleeping or playing. Common cribs require locking mechanisms on both the bottom frame (or base) and the armrests. When folding the crib, the bottom frame or base must be manually released first, followed by the four armrest joints. This makes folding such a crib quite cumbersome. Some existing cribs allow for simultaneous locking of the base and armrests, but these require additional simultaneous locking devices or linkages between the base and armrests, resulting in a more complex structure. Furthermore, some existing cribs lack a positioning mechanism when folded, preventing them from remaining in the folded position and standing upright on their own, making them inconvenient to use. Utility Model Content

[0003] One embodiment of this disclosure provides a foldable crib. The foldable crib includes: a fixed base including a first connecting groove; an armrest tube, one end of which is pivotally connected to the upright mechanism at a third pivot point, and the other end of which is movably connected to the fixed base at a fourth pivot point; and a linkage mechanism configured to assist in the folding and unfolding of the foldable crib, one end of which is pivotally connected to the upright mechanism, and the other end of which is pivotally connected to the fixed base. The linkage mechanism includes a linkage rod extending parallel to the armrest tube and a linkage member extending non-parallel to the linkage rod.

[0004] In one embodiment, the linkage mechanism or the armrest tube is provided with a connecting member. The connecting member is slidable relative to the first connecting groove and has a locked position and an unlocked position. When the connecting member is in the locked position, the armrest tube is locked relative to the fixed base and the column mechanism. When the connecting member is in the unlocked position, the armrest tube is pivotable relative to the fixed base and the column mechanism to fold up the foldable crib.

[0005] In one embodiment, the first connecting groove is configured as a first sliding groove in which the connecting member can slide. The first sliding groove includes a first groove segment parallel to the length direction of the handrail tube and a second groove segment angled to the first groove segment. The two opposite ends of the first groove segment constitute a locking position and an unlocking position of the connecting member. The second groove segment is connected to the first groove segment at the end of the first groove segment corresponding to the unlocking position.

[0006] In one embodiment, the first connecting groove is configured as a first locking groove located at the edge of the fixing base. When the connecting member is in the locked position, the connecting member is locked in the first locking groove. When the connecting member is in the unlocked position, the connecting member disengages from the first locking groove.

[0007] In one embodiment, the linkage is configured to slide relative to the handrail tube. The linkage includes: a first linkage, one end of which is pivotally connected to the column mechanism at a fifth pivot point, and the other end of which is pivotally connected to a first end of the linkage at a first pivot point; and a second linkage, one end of which is pivotally connected to the fixed base at a sixth pivot point, and the other end of which is pivotally connected to a second end of the linkage at a second pivot point.

[0008] In one embodiment, the linkage rod is slidably disposed within the handrail tube, and a slot is provided at a position corresponding to the first end and the second end of the linkage rod in the handrail tube, so that the first linkage member and the second linkage member can extend out from the handrail tube.

[0009] In one embodiment, the angle between the line connecting the third pivot point and the fifth pivot point and the connecting rod gradually decreases during the closing process.

[0010] In one embodiment, the angle between the line connecting the fourth pivot point and the sixth pivot point and the linkage rod gradually decreases during the folding process of the collapsible crib.

[0011] In one embodiment, the linkage is slidably sleeved on the handrail tube.

[0012] In one embodiment, the collapsible crib further includes a synchronization component comprising two synchronizing elements arranged in a cross configuration, each synchronizing element having one end pivotally connected to one of the armrest tubes and the other end pivotally and slidably connected to the fixed base.

[0013] In one embodiment, the two synchronizing members are respectively provided with a second sliding groove and a third sliding groove. A second fastener on the fixed base is disposed in the second sliding groove and can slide and pivot relative to the second sliding groove. The two third sliding grooves are intersected, and a third fastener is disposed at the intersection of the two third sliding grooves; the two synchronizing members can pivot relative to the third fastener.

[0014] In one embodiment, the fixed base is provided with a guide groove, and the third fastener is disposed within the guide groove. When the handrail tube pivots and retracts relative to the fixed base, the third fastener slides within the guide groove.

[0015] In one embodiment, the collapsible crib further includes a synchronization component. The synchronization component includes two synchronizing elements, which are two synchronously rotating gears, each of which is connected to one of the armrest tubes.

[0016] In one embodiment, the two synchronous gears are rotatably connected to the fixed base via rotating shafts, and the two synchronous gears mesh with each other. Each of the two synchronous gears is provided with a linkage groove, and the connecting member is movably disposed in the linkage groove, so that the rotation of the handrail tube can drive the synchronous gear to rotate.

[0017] In one embodiment, the rotating shaft is a columnar structure protruding from the outer surface of the synchronizing gear, or a connecting pin passing through the synchronizing gear.

[0018] In one embodiment, the synchronizing gear has an extension extending outward from its outer diameter, and the linkage groove is located on the extension.

[0019] In one embodiment, the linkage groove is a groove extending along the diameter direction of the synchronizing gear, or a through hole penetrating the synchronizing gear.

[0020] In one embodiment, each of the two synchronizing gears is pivotally connected to the fixed base at a fourth pivot point, and the two synchronizing gears are connected by a transmission device to enable them to rotate synchronously. Each of the two synchronizing gears is provided with an engagement mechanism between itself and the corresponding handrail tube, such that rotation of the handrail tube drives the synchronizing gear to rotate.

[0021] In one embodiment, the engaging mechanism includes a first engaging member disposed on the handrail tube and a second engaging member disposed on the synchronizing gear, the first engaging member and the second engaging member being movably connected to each other.

[0022] In one embodiment, the pivot position of the handrail tube to the column mechanism and the pivot position of the linkage mechanism to the column mechanism are offset in the vertical direction.

[0023] In one embodiment, the pivot position of the handrail tube to the column mechanism and the pivot position of the linkage mechanism to the column mechanism are offset in the horizontal and vertical directions.

[0024] In one embodiment, the column mechanism includes a column and a corner piece, the corner piece being fixedly connected to the upper end of the column, and one end of the handrail tube and one end of the first linkage member being pivotally connected to the corner piece.

[0025] In one embodiment, the collapsible crib further includes a bottom frame comprising a base rod and a base, the two ends of the base rod being pivotally connected to the base and the upright mechanism, respectively, so that the base rod can pivot relative to the base and collapsing relative to each other.

[0026] In one embodiment, the column mechanism includes a column and a base, the column being pivotally connected to the base, and the base rod being fixedly connected to the base.

[0027] In one embodiment, the base includes a receiving recess and a rolling element at least partially disposed within the receiving recess. When the base is in the extended position, the rolling element is not in contact with the ground. When the base pivots to retract, the rolling element contacts the ground to assist in retraction.

[0028] In one embodiment, the collapsible crib further includes a first fixing member. The first fixing member is fixedly connected to the fixing base and disposed within the cavity of the fixing base, thereby separating the side wall of the fixing base from the linkage mechanism or the synchronization member.

[0029] In one embodiment, the foldable crib further includes a second fixing member. The second fixing member is fixedly connected to the armrest tube and has a connection opening, and one end of the synchronizing member is connected to the armrest tube within the connection opening.

[0030] Another embodiment of this disclosure provides a foldable crib. The foldable crib includes: a support column mechanism; and an armrest mechanism connected to the upper ends of the support column mechanism. The armrest mechanism includes: a fixed base including a first connecting groove; two armrest tubes, each of which has one end pivotally connected to the support column mechanism and the other end pivotally connected to the fixed base; and two linkage mechanisms pivotally connected between the support column mechanism and the fixed base. It also includes a synchronization component, comprising two synchronously linked synchronizers, each of which is linked to a corresponding armrest tube, enabling the two armrest tubes to be synchronously folded or synchronously unfolded via the synchronization component.

[0031] In one embodiment, a connecting member is provided on the armrest tube or the linkage mechanism. The connecting member is movable relative to the first sliding groove and has a locked position and an unlocked position. When the connecting member is in the locked position, the armrest tube is locked relative to the fixed base and the column mechanism. When the connecting member is in the unlocked position, the armrest tube is pivotable relative to the fixed base and the column mechanism to fold up the foldable crib.

[0032] In one embodiment, the two synchronizing elements are arranged in a cross configuration. One end of each of the two synchronizing elements is pivotally connected to one of the two handrail tubes, and the other end is pivotally and slidably connected to the fixed base.

[0033] In one embodiment, the two synchronizing elements are two synchronously rotating gears, each of which is connected to one of the handrail tubes.

[0034] In one embodiment, the linkage mechanism includes a first linkage member, a linkage rod, and a second linkage member. One end of the first linkage member is pivotally connected to the column mechanism, and the other end of the first linkage member is pivotally connected to the first end of the linkage rod. One end of the second linkage member is pivotally connected to the fixed base, and the other end of the second linkage member is pivotally connected to the second end of the linkage rod.

[0035] The linkage rod is slidably disposed inside the handrail tube. A slot is provided at the position corresponding to the first end and the second end of the linkage rod in the handrail tube so that the first linkage member and the second linkage member can extend out from the handrail tube.

[0036] In one embodiment, the linkage mechanism is an auxiliary tube arranged parallel to the handrail tube, with one end of the auxiliary tube pivotally connected to the column mechanism and the other end pivotally connected to the fixed base.

[0037] In one embodiment, each of the two synchronizing members is provided with a second sliding groove and a third sliding groove that are spaced apart. A fastener fixedly connected to the fixed base is disposed in the second sliding groove and is capable of sliding and pivoting relative to the second sliding groove. The two third sliding grooves are intersected, and another fastener is disposed at the intersection of the two third sliding grooves, and the two synchronizing members are capable of pivoting and sliding relative to the other fastener.

[0038] Another embodiment of this disclosure provides a foldable crib. The foldable crib includes: a support column mechanism; an armrest tube, one end of which is pivotally connected to the support column mechanism; a fixed base, the other end of which is pivotally and slidably connected to the fixed base; and a linkage mechanism for assisting in the folding and unfolding of the foldable crib. The linkage mechanism includes a linkage rod extending parallel to the armrest tube and a linkage member extending non-parallel to the linkage rod. The linkage mechanism is pivotally connected to the support column mechanism and the fixed base respectively via corresponding linkage members. The linkage rod is pivotally connected to the corresponding linkage member via a first pivot point and a second pivot point.

[0039] The collapsible crib has an unfolded state and a folded state. During the process of switching between the unfolded state and the folded state, the positions of the first pivot point and the second pivot point relative to the armrest tube change continuously in a direction parallel to the armrest tube.

[0040] In one embodiment, the first pivot point and the second pivot point are located further away from the connection between the armrest tube and the column mechanism when the collapsible crib is in the collapsible state than when the collapsible crib is in the unfolded state.

[0041] In one embodiment, the handrail tube is pivotally connected to the column mechanism via a third pivot point, the handrail tube is pivotally connected to the fixed seat via a fourth pivot point, the corresponding linkage connected at the first pivot point is pivotally connected to the column mechanism via a fifth pivot point, and the corresponding linkage connected at the second pivot point is pivotally connected to the fixed seat via a sixth pivot point.

[0042] The lines connecting the first, third, and fifth pivot points form a first triangle, and the lines connecting the second, fourth, and sixth pivot points form a second triangle. During the transition of the collapsible crib between its unfolded and folded states, the angles of the first and second triangles continuously change.

[0043] In one embodiment, in the first triangle, the angle at the first pivot point is angle α1, the angle at the third pivot point is angle α3, and the angle at the fifth pivot point is angle α5. During the process of the collapsible crib switching from the unfolded state to the folded state, angle α3 of the first triangle gradually decreases, angle α5 gradually increases, and angle α1 first increases and then decreases.

[0044] In one embodiment, in the second triangle, the angle at the second pivot point is angle α2, the angle at the fourth pivot point is angle α4, and the angle at the sixth pivot point is angle α6. During the process of the collapsible crib switching from the unfolded state to the folded state, angle α6 of the second triangle gradually decreases, angle α4 gradually increases, and angle α2 first increases and then decreases.

[0045] In one embodiment, the linkage is slidably disposed within the handrail tube. The linkage includes: a first linkage, one end of which is pivotally connected to the column mechanism at the fifth pivot point, and the other end of which is pivotally connected to the first end of the linkage at the first pivot point; and a second linkage, one end of which is pivotally connected to the fixed base at the sixth pivot point, and the other end of which is pivotally connected to the second end of the linkage at the second pivot point.

[0046] In one embodiment, the collapsible crib further includes a synchronization component comprising two synchronizing elements arranged in a cross configuration. One end of each of the two synchronizing elements is pivotally connected to the armrest tube, and the other end is pivotally and slidably connected to the fixed base, so that the armrest tubes located on both sides of the fixed base collide synchronously.

[0047] One embodiment of this disclosure provides a foldable crib. The foldable crib includes: a fixed base including a first sliding groove; an armrest tube, one end of which is pivotally connected to the upright mechanism at a third pivot point, and the other end of which is movably connected to the fixed base at a fourth pivot point; and a linkage mechanism configured to assist in the folding and unfolding of the foldable crib, one end of which is pivotally connected to the upright mechanism, and the other end of which is pivotally connected to the fixed base. The linkage mechanism includes a linkage rod extending parallel to the armrest tube and a linkage member extending non-parallel to the linkage rod.

[0048] In one embodiment, a first connector is provided on the linkage mechanism or the armrest tube. The first connector is slidable in the first sliding groove and has a locked position and an unlocked position. When the first connector is in the locked position, the armrest tube is locked relative to the fixed base and the column mechanism. When the first connector is in the unlocked position, the armrest tube is pivotable relative to the fixed base and the column mechanism to fold up the foldable crib.

[0049] In one embodiment, the first sliding groove includes a first groove segment parallel to the length direction of the handrail tube and a second groove segment set at an angle to the first groove segment. The two opposite ends of the first groove segment constitute the locking position and the unlocking position of the first connector. The second groove segment is connected to the first groove segment at the end of the first groove segment corresponding to the unlocking position.

[0050] In one embodiment, the linkage includes: a first linkage, one end of which is pivotally connected to the column mechanism at a fifth pivot point, and the other end of which is pivotally connected to the first end of the linkage rod at a first pivot point; and a second linkage, one end of which is pivotally connected to the fixed base at a sixth pivot point, and the other end of which is pivotally connected to the second end of the linkage rod at a second pivot point.

[0051] The linkage rod is slidably disposed inside the handrail tube. A slot is provided at the position corresponding to the first end and the second end of the linkage rod in the handrail tube so that the first linkage member and the second linkage member can extend out from the handrail tube.

[0052] In one embodiment, the angle between the line connecting the third pivot point and the fifth pivot point and the connecting rod gradually decreases during the closing process.

[0053] In one embodiment, the angle between the line connecting the fourth pivot point and the sixth pivot point and the linkage rod gradually decreases during the folding process of the collapsible crib.

[0054] In one embodiment, the collapsible crib further includes a synchronization component comprising two staggered synchronization members, each of which has one end pivotally connected to the armrest tube and the other end pivotally and slidably connected to the fixed base.

[0055] In one embodiment, the two synchronizing members are respectively provided with a second sliding groove and a third sliding groove. A second fastener on the fixed base is disposed in the second sliding groove and can slide and pivot relative to the second sliding groove. The two third sliding grooves are staggered, and a third fastener is disposed at the intersection of the two third sliding grooves, allowing the two synchronizing members to pivot relative to the third fastener.

[0056] In one embodiment, the fixed base is provided with a guide groove, and the third fastener is disposed within the guide groove. When the handrail tube pivots and retracts relative to the fixed base, the third fastener slides within the guide groove.

[0057] In one embodiment, the pivot position of the handrail tube to the column mechanism and the pivot position of the linkage mechanism to the column mechanism are offset in the vertical direction.

[0058] In one embodiment, the pivot position of the handrail tube to the column mechanism and the pivot position of the linkage mechanism to the column mechanism are offset in the horizontal and vertical directions.

[0059] In one embodiment, the column mechanism includes a column and a corner piece, the corner piece being fixedly connected to the upper end of the column, and one end of the handrail tube and one end of the first linkage member being pivotally connected to the corner piece.

[0060] In one embodiment, the collapsible crib further includes a bottom frame comprising a base rod and a base, the two ends of the base rod being pivotally connected to the base and the upright mechanism, respectively, so that the base rod can pivot relative to the base and collapsing relative to each other.

[0061] In one embodiment, the column mechanism includes a column and a base, the column being pivotally connected to the base, and the base rod being fixedly connected to the base.

[0062] In one embodiment, the base includes a receiving recess and a rolling element at least partially disposed within the receiving recess. When the base is in the extended position, the rolling element is not in contact with the ground. When the base pivots to retract, the rolling element contacts the ground to assist in retraction.

[0063] In one embodiment, the collapsible crib further includes a first fixing member. The first fixing member is fixedly connected to the fixing base and disposed within the cavity of the fixing base, thereby separating the side wall of the fixing base from the linkage mechanism or the synchronization member.

[0064] In one embodiment, the foldable crib further includes a second fixing member. The second fixing member is fixedly connected to the armrest tube and has a connection opening, and one end of the synchronizing member is connected to the armrest tube within the connection opening.

[0065] Another embodiment of this disclosure provides a foldable crib. The foldable crib includes: a support column mechanism; and an armrest mechanism connected to the upper ends of the support column mechanism. The armrest mechanism includes: a fixed base including a first sliding groove; two armrest tubes, each of which has one end pivotally connected to the support column mechanism and the other end pivotally connected to the fixed base; and two linkage mechanisms pivotally connected between the support column mechanism and the fixed base. It also includes a synchronization component, comprising two staggered synchronization members, each of which has one end pivotally connected to one of the two armrest tubes and the other end pivotally and slidably connected to the fixed base.

[0066] In one embodiment, a first connector is provided on the armrest tube or the linkage mechanism. The first connector is movable within the first sliding groove and has a locked position and an unlocked position. When the first connector is in the locked position, the armrest tube is locked relative to the fixed base and the column mechanism. When the first connector is in the unlocked position, the armrest tube is pivotable relative to the fixed base and the column mechanism to fold up the foldable crib.

[0067] In one embodiment, the linkage mechanism includes a first linkage member, a linkage rod, and a second linkage member. One end of the first linkage member is pivotally connected to the column mechanism, and the other end of the first linkage member is pivotally connected to the first end of the linkage rod. One end of the second linkage member is pivotally connected to the fixed base, and the other end of the second linkage member is pivotally connected to the second end of the linkage rod.

[0068] The linkage rod is slidably disposed inside the handrail tube. A slot is provided at the position corresponding to the first end and the second end of the linkage rod in the handrail tube so that the first linkage member and the second linkage member can extend out from the handrail tube.

[0069] In one embodiment, the linkage mechanism is an auxiliary tube arranged parallel to the handrail tube, with one end of the auxiliary tube pivotally connected to the column mechanism and the other end pivotally connected to the fixed base.

[0070] In one embodiment, each of the two synchronizing members is provided with a second sliding groove and a third sliding groove that are spaced apart. A fastener fixedly connected to the fixed base is disposed in the second sliding groove and is capable of sliding and pivoting relative to the second sliding groove. The two third sliding grooves are staggered, and another fastener is disposed at the intersection of the two third sliding grooves, and the two synchronizing members are capable of pivoting and sliding relative to the other fastener.

[0071] Another embodiment of this disclosure provides a foldable crib. The foldable crib includes: a support column mechanism; an armrest tube, one end of which is pivotally connected to the support column mechanism; a fixed base, the other end of which is pivotally and slidably connected to the fixed base; and a linkage mechanism for assisting in the folding and unfolding of the foldable crib. The linkage mechanism includes a linkage rod extending parallel to the armrest tube and a linkage member extending non-parallel to the linkage rod. The linkage mechanism is pivotally connected to the support column mechanism and the fixed base respectively via corresponding linkage members. The linkage rod is pivotally connected to the corresponding linkage member via a first pivot point and a second pivot point.

[0072] The collapsible crib has an unfolded state and a folded state. During the process of switching between the unfolded state and the folded state, the positions of the first pivot point and the second pivot point relative to the armrest tube change continuously in a direction parallel to the armrest tube.

[0073] In one embodiment, the first pivot point and the second pivot point are located further away from the connection between the armrest tube and the column mechanism when the collapsible crib is in the collapsed state than when the collapsible crib is in the unfolded state.

[0074] In one embodiment, the handrail tube is pivotally connected to the column mechanism via a third pivot point, the handrail tube is pivotally connected to the fixed seat via a fourth pivot point, the corresponding linkage connected at the first pivot point is pivotally connected to the column mechanism via a fifth pivot point, and the corresponding linkage connected at the second pivot point is pivotally connected to the fixed seat via a sixth pivot point.

[0075] The lines connecting the first, third, and fifth pivot points form a first triangle, and the lines connecting the second, fourth, and sixth pivot points form a second triangle. During the transition of the collapsible crib between its unfolded and folded states, the angles of the first and second triangles continuously change.

[0076] In one embodiment, in the first triangle, the angle at the first pivot point is angle α1, the angle at the third pivot point is angle α3, and the angle at the fifth pivot point is angle α5. During the process of the collapsible crib switching from the unfolded state to the folded state, angle α3 of the first triangle gradually decreases, angle α5 gradually increases, and angle α1 first increases and then decreases.

[0077] In one embodiment, in the second triangle, the angle at the second pivot point is angle α2, the angle at the fourth pivot point is angle α4, and the angle at the sixth pivot point is angle α6. During the process of the collapsible crib switching from the unfolded state to the folded state, angle α6 of the second triangle gradually decreases, angle α4 gradually increases, and angle α2 first increases and then decreases.

[0078] In one embodiment, the linkage is slidably disposed within the handrail tube. The linkage includes: a first linkage, one end of which is pivotally connected to the column mechanism at the fifth pivot point, and the other end of which is pivotally connected to the first end of the linkage at the first pivot point; and a second linkage, one end of which is pivotally connected to the fixed base at the sixth pivot point, and the other end of which is pivotally connected to the second end of the linkage at the second pivot point.

[0079] In one embodiment, the collapsible crib further includes a synchronization component comprising two staggered synchronization members, one end of each of the two synchronization members being pivotally connected to the armrest tube, and the other end being pivotally and slidably connected to the fixed base, so that the armrest tubes located on both sides of the fixed base are collapsing synchronously.

[0080] One embodiment of this disclosure also provides a foldable crib, including: a fixed base; a first armrest tube and a second armrest tube pivotally connected to the fixed base; and a synchronization component, the synchronization component including a first synchronization member and a second synchronization member, a first end of the first synchronization member being movably connected to the fixed base, a second end of the first synchronization member being movably connected to the first armrest tube, a first end of the second synchronization member being movably connected to the fixed base, and a second end of the second synchronization member being movably connected to the second armrest tube; wherein, the foldable crib has an unfolded state and a folded state, during the process of the foldable crib transitioning from the unfolded state to the folded state, the pivotal movement of one of the first armrest tubes and the second armrest tube relative to the fixed base drives the first synchronization member and the second synchronization member to move relative to the fixed base, thereby driving the other of the first armrest tubes and the second armrest tube to pivot relative to the fixed base, so as to achieve synchronous folding of the first armrest tube and the second armrest tube.

[0081] In one embodiment, the foldable crib further includes a column mechanism, the fixed base is provided with a first sliding groove, and each of the first armrest tube and the second armrest tube is provided with a first connector, or the fixed base is provided with a first connector and each of the first armrest tube and the second armrest tube is provided with a first sliding groove. The first connector is slidable in the first sliding groove and has a locked position and an unlocked position. When the first connector is in the locked position, the armrest tube is locked relative to the fixed base and the column mechanism; and when the first connector is in the unlocked position, the armrest tube is pivotable relative to the fixed base and the column mechanism to fold the foldable crib.

[0082] In one embodiment, the foldable crib further includes a linkage mechanism, wherein the upright mechanism is connected to the first armrest tube and the second armrest tube, one end of the linkage mechanism is pivotally connected to the upright mechanism, and the other end of the linkage mechanism is pivotally connected to the fixed base. The linkage mechanism is configured such that pivoting of the upright mechanism relative to the first armrest tube and the second armrest tube causes the first armrest tube and the second armrest tube to move relative to the fixed base, thereby releasing the first armrest tube and the second armrest tube relative to the fixed base.

[0083] In one embodiment, the linkage mechanism includes a linkage rod extending parallel to the first handrail tube and the second handrail tube, and a linkage member extending non-parallel to the linkage rod. The linkage member includes: a first linkage member, one end of which is pivotally connected to the column mechanism at a fifth pivot point, and the other end of which is pivotally connected to a first end of the linkage rod at a first pivot point; and a second linkage member, one end of which is pivotally connected to the fixed base at a sixth pivot point, and the other end of which is pivotally connected to a second end of the linkage rod at a second pivot point. The linkage rod is configured to slide relative to the first handrail tube and the second handrail tube along the extending direction of the first handrail tube and the second handrail tube.

[0084] In one embodiment, the first synchronizing element and the second synchronizing element are staggered, with the first ends of the first synchronizing element and the second synchronizing element respectively pivotally connected to the fixed base, and the second ends of the first synchronizing element and the second synchronizing element respectively pivotally connected to the first handrail tube and the second handrail tube.

[0085] In one embodiment, a third fastener is provided at the intersection of the first synchronizing member and the second synchronizing member, and the first synchronizing member and the second synchronizing member are pivotable relative to the third fastener.

[0086] In one embodiment, the fixed base is provided with a guide groove, and the third fastener is disposed in the guide groove. When the handrail tube pivots relative to the fixed base, the third fastener slides in the guide groove.

[0087] In one embodiment, the synchronization component further includes a third synchronization element and a fourth synchronization element, the first ends of the third synchronization element and the fourth synchronization element being pivotally connected to each other, and the second end of the third synchronization element being pivotally connected between the first end and the second end of the first synchronization element, and the second end of the fourth synchronization element being pivotally connected between the first end and the second end of the second synchronization element.

[0088] In one embodiment, the fixing base includes a fixing base housing and a fixing member connected to the fixing base housing, the lower end of the fixing base housing having an opening, and the fixing member being configured to cover the opening.

[0089] In one embodiment, the fixing member includes a first fixing member and a second fixing member, with a gap between the first fixing member and the second fixing member, such that the first synchronizing member and the second synchronizing member are movably located between the first fixing member and the second fixing member.

[0090] In one embodiment, each of the first and second fixing members has a rotation guide surface, and a positioning protrusion is formed on each of the rotation guide surfaces. When the collapsible crib is in the collapsible state, the positioning protrusion applies resistance to the pivoting of the first and second armrest tubes. Attached Figure Description

[0091] The accompanying drawings are included herein to provide a further understanding of the present disclosure and are incorporated in and form a part of this specification. The drawings illustrate embodiments of the present disclosure and, together with the following description, serve to illustrate the ideas of the present disclosure.

[0092] Figure 1 This is a perspective view of a collapsible crib according to a first embodiment of the present disclosure.

[0093] Figure 2 for Figure 1 The front view of the armrest mechanism of the collapsible crib shown.

[0094] Figure 3A for Figure 2 A partial sectional view of the handrail mechanism shown.

[0095] Figure 3B for Figure 3A An enlarged view of part A shown.

[0096] Figure 3C for Figure 3AA schematic diagram of the triangle formed by the corresponding pivot points shown.

[0097] Figure 4A for Figure 3A The diagram shows the handrail mechanism in its folded state.

[0098] Figure 4B for Figure 4A A schematic diagram of the triangle formed by the corresponding pivot points shown.

[0099] Figure 5 This is a front view of the mounting bracket according to a first embodiment of the present disclosure.

[0100] Figure 6A and Figure 6B This is a partial perspective view of the handrail mechanism according to the first embodiment of this disclosure.

[0101] Figures 7 to 9 This is a schematic diagram illustrating the folding process of a foldable crib according to the first embodiment of this disclosure.

[0102] Figure 10 This is a perspective view of a collapsible crib according to a second embodiment of the present disclosure.

[0103] Figure 11A for Figure 10 A three-dimensional diagram of the column mechanism shown.

[0104] Figure 11B for Figure 11A The diagram shows the column mechanism in another state.

[0105] Figure 12A and Figure 12B These are partially exploded views of the handrail mechanism according to the second embodiment of this disclosure.

[0106] Figure 13 This is a perspective view of the handrail mechanism according to the third embodiment of this disclosure.

[0107] Figures 14A to 14C This is a perspective view of the handrail mechanism according to the fourth embodiment of the present disclosure.

[0108] Figure 15 for Figure 14C A perspective view of the synchronizing component of the handrail mechanism shown.

[0109] Figure 16 This is a perspective view of the linkage according to the fifth embodiment of this disclosure.

[0110] Figure 17A and Figure 17B for Figure 16 The diagram shows a three-dimensional representation of the linkage installed in a collapsible crib.

[0111] Figure 18 This is a front view of the armrest mechanism of a collapsible crib according to the sixth embodiment of this disclosure.

[0112] Figure 19A for Figure 18 Another front view of the armrest mechanism shown, in which the front mounting bracket has been removed.

[0113] Figure 19B for Figure 19A An enlarged view of part B shown.

[0114] Figure 19C for Figure 19A A 3D view of the synchronization components shown.

[0115] Figure 20A and Figure 20B They are respectively Figure 19A A partial view of the collapsible crib in its folded state.

[0116] Figure 21 for Figure 18 The front view of the mounting bracket shown.

[0117] Figure 22A and Figure 22B These are side perspective views of the collapsible crib in different states according to the sixth embodiment of this disclosure.

[0118] Figure 23A This is a front view of the synchronization component of a collapsible crib according to the seventh embodiment of this disclosure.

[0119] Figure 23B for Figure 23A The front view shown is of the synchronization component in another state.

[0120] Figure 24 for Figure 23A The cross-sectional view of the first synchronizing gear shown.

[0121] Figure 25 for Figure 23A The first synchronizing gear is shown in a three-dimensional view.

[0122] Figure 26A and Figure 26B These are front views of the first synchronizing gear at different positions on the handrail tube.

[0123] Figure 27 This is a partial cross-sectional view of the handrail mechanism according to the seventh embodiment of this disclosure.

[0124] Figure 28 This is a perspective view of a fixed seat provided on a handrail mechanism according to the seventh embodiment of this disclosure.

[0125] Figure 29 This is a front view of the armrest mechanism of the retractable crib according to the eighth embodiment of this disclosure.

[0126] Figure 30 for Figure 29 A magnified view of a portion of the handrail mechanism shown.

[0127] Figure 31 for Figure 29 The enlarged view shows the handrail mechanism in another state.

[0128] Figures 32 to 34 for Figure 29 The enlarged views shown are of the handrail mechanism in different states, with the front fixing seat removed.

[0129] Figure 35 for Figure 32 A three-dimensional view of the synchronizing gears shown.

[0130] Figure 36 For along Figure 32 The sectional view taken by line XX in the figure.

[0131] Figure 37 This is a schematic diagram of the armrest mechanism of the collapsible crib according to the eighth embodiment of this disclosure when it is unfolded.

[0132] Figure 38 for Figure 37 The diagram shows the armrest mechanism when it is closed.

[0133] Figure 39A A perspective view of a collapsible crib according to the ninth embodiment of this disclosure;

[0134] Figure 39B This is a plan view of a collapsible crib according to the ninth embodiment of this disclosure;

[0135] Figure 40 for Figure 39A A magnified view of part G;

[0136] Figure 41 This is a cross-sectional view of the armrest mechanism of a collapsible crib according to the ninth embodiment of this disclosure;

[0137] Figure 42A for Figure 41 A close-up view of part B, showing the handrail tube in an unlocked state relative to the fixed base;

[0138] Figure 42B This is a partial cross-sectional view of the armrest mechanism of a collapsible crib according to the ninth embodiment of the present disclosure, wherein the armrest tube is locked relative to the fixed seat;

[0139] Figure 43This is a cross-sectional view of the armrest mechanism of a collapsible crib according to the ninth embodiment of the present disclosure, wherein the armrest tube is in a collapsed state;

[0140] Figure 44 for Figure 43 A magnified view of part E;

[0141] Figure 45 A perspective view of the synchronization component of a collapsible crib according to the ninth embodiment of this disclosure;

[0142] Figure 46 Another perspective view of the synchronization component of the collapsible crib according to the ninth embodiment of this disclosure;

[0143] Figure 47 This is an exploded perspective view of some components of a collapsible crib according to the ninth embodiment of this disclosure;

[0144] Figure 48 This is a cross-sectional view of the armrest mechanism of a collapsible crib according to the tenth embodiment of this disclosure;

[0145] Figure 49 for Figure 48 A magnified view of part D;

[0146] Figure 50 This is a perspective view of the first fixing member of the collapsible crib according to the eleventh embodiment of this disclosure;

[0147] Figure 51 This is a perspective view of some components of a collapsible crib according to the eleventh embodiment of the present disclosure, wherein the armrest tube is in an extended state;

[0148] Figure 52 This is a perspective view of some components of the armrest mechanism of a collapsible crib according to the eleventh embodiment of the present disclosure, wherein the armrest tube is in an unfolded state;

[0149] Figure 53 This is a perspective view of some components of the armrest mechanism of a collapsible crib according to the eleventh embodiment of the present disclosure, wherein the armrest tube is in a collapsed state;

[0150] Figure 54 This is a partial cross-sectional view of the armrest mechanism of a collapsible crib according to the eleventh embodiment of the present disclosure, wherein the armrest tube is in the unfolded state;

[0151] Figure 55 This is a partial cross-sectional view of the armrest mechanism of a retractable crib according to the eleventh embodiment of the present disclosure, wherein the armrest tube is in a retracted state.

[0152] Explanation of reference numerals in the attached figures:

[0153] Foldable cribs in sizes 100, 200, 400, and 500 mm.

[0154] Columns 110, 210, 310, 610, 810

[0155] Fixtures 120, 220, 320, 420, 720, 820

[0156] First sliding grooves 121, 621, 721

[0157] First section 121a, 621a

[0158] Second section 121b, 621b

[0159] First locking slot 821

[0160] Guide groove 122

[0161] First fastener 223

[0162] Horizontal section 223a

[0163] Vertical section 223b

[0164] 223c piercing

[0165] Second fastener 224

[0166] Shape adaptor 224a

[0167] Gap 551a

[0168] First linkage components 152, 252, 452

[0169] Second linkage components 153, 253, 453

[0170] Auxiliary tube 351

[0171] Card-connecting mechanism 760

[0172] First mating part 761

[0173] Second mating part 762

[0174] Synchronization components 170, 470, 670, 770, 870

[0175] First synchronizer components 171, 271, 471

[0176] Second sliding groove 171a

[0177] Third sliding groove 171b

[0178] First piece 471c

[0179] Second piece 471d

[0180] Connector 471e

[0181] Second synchronization components 172, 272, 472

[0182] First synchronizing gears 671, 771, 871

[0183] First linkage slots 671a, 871a

[0184] Extensions 672b and 872b

[0185] Second synchronizing gears 672, 772, 872

[0186] Second linkage groove 672a

[0187] First rotating shafts 673, 873

[0188] Second rotating shafts 674, 874

[0189] Transmission device 775

[0190] Bottom frame 180, 280

[0191] Base rod 181, 281

[0192] Base 182, 282

[0193] Support component 283

[0194] Base 190, 290

[0195] Storage recess 291

[0196] Rolling component 292

[0197] First fasteners 101, 601, 701

[0198] Second fasteners 102, 202, 402

[0199] Third fasteners 103, 203, 403

[0200] Wear-resistant parts 104

[0201] Part 505

[0202] First pivot point P1

[0203] Second pivot point P2

[0204] Third pivot point P3

[0205] Fourth pivot point P4

[0206] Fifth pivot point P5

[0207] Sixth pivot point P6

[0208] Horizontal direction D1

[0209] Vertical direction D2

[0210] Vertical direction D3

[0211] First triangle T1

[0212] Second triangle T2

[0213] Angle α1, α2, α3, α4, α5, α6

[0214] Foldable crib 400s

[0215] Column 410s

[0216] 420s Fixed base

[0217] Mounting housing 421s

[0218] Opening 4211s

[0219] First segment 4212s

[0220] Second segment 4213s

[0221] Connector 4214s

[0222] Fastener 422s

[0223] First fastener 423s

[0224] Second fastener 424s

[0225] Guide groove 425s

[0226] 426s of the interval

[0227] Rotation guide surface 427s

[0228] Positioning convex 4271s

[0229] Rotation stop surface 428s

[0230] Card Section 429s

[0231] Handrail tube 430s

[0232] First handrail tube 430as

[0233] Second handrail tube 430bs

[0234] Card assembly 432s

[0235] 433s of the contact section

[0236] Top corner piece 440s

[0237] 450s linkage mechanism

[0238] Linkage rod 451s

[0239] First linkage 452s

[0240] Second linkage 453s

[0241] Synchronization component 470s

[0242] First synchronization element 471s

[0243] Second synchronization element 472s

[0244] Third synchronization component 473s

[0245] Fourth synchronization element 474s

[0246] Bottom frame 480s

[0247] Base rod 481s

[0248] Base 482s

[0249] First fastener 401s

[0250] Second fastener 402s

[0251] Third fastener 403s

[0252] Fourth fastener 404s

[0253] Fifth fastener 405s

[0254] Sixth fastener 406s Detailed Implementation

[0255] To facilitate understanding of this disclosure, a more complete description will now be given with reference to the accompanying drawings, in which alternative embodiments of the present disclosure are shown. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0256] This disclosure will now be described in detail with reference to the accompanying drawings.

[0257] refer to Figure 1 , Figure 1 This is a perspective view of a collapsible crib 100 according to a first embodiment of this disclosure. Figure 1As shown, the collapsible crib 100 may include upright mechanisms and armrest mechanisms, with the armrest mechanisms connected between the upright mechanisms, for example, connected to the upper end or top of the upright mechanisms. In one example, the upright mechanism includes uprights 110. In this embodiment, the collapsible crib 100 may include four uprights 110 and four armrest mechanisms respectively connected between two adjacent uprights 110 to form a quadrilateral structure at the upper end of the crib 100. The armrest mechanisms may pivot relative to the uprights 110, for example, one end may be pivotally connected (i.e., pivotally connected) to the uprights 110. Through the pivotal connection between the armrest mechanisms and the uprights 110, the four armrest mechanisms can each pivot relative to the uprights 110 to which they are connected, thereby enabling the uprights 110 to be brought closer together to achieve the overall collapsing of the crib 100.

[0258] In one example, such as Figure 1 As shown, the support column mechanism may further include corner brackets 140. Corner brackets 140 may be fixedly connected to the support column 110. In this embodiment, the crib 100 may have four corner brackets 140, respectively disposed at the upper or top end of the four support columns 110. In this example, the armrest mechanism may be pivotally connected to the corner brackets 140 (rather than directly pivotally connected to the aforementioned support columns 110), that is, each armrest mechanism may be pivotally connected between two corner brackets 140 to be able to pivot relative to the support column 110.

[0259] Optionally, the support structure may also include a foot 190. The foot 190 is located at the lower end of the support 110 and abuts against the ground to support the crib 100 on the ground. In one example, the foot 190 may be fixedly connected to the support 110, for example, by fitting around the bottom end of the support 110.

[0260] Furthermore, the collapsible crib 100 may also include a bottom frame 180 connected to the upright mechanism (i.e., the upright 110 or the base 190). In this embodiment, the bottom frame 180 may have a locked state and an unlocked state. When the crib 100 is unfolded, the unfolding of the crib 100 can be maintained by locking the bottom frame 180. When the bottom frame 180 is unlocked, the entire collapsible crib 100 can be folded and unfolded by operating the bottom frame 180. Specifically, the bottom frame 180 may include a base rod 181 and a base 182, with both ends of the base rod 181 pivotally connected to the base 182 and the upright mechanism (e.g., the upright 110 or the base 190), respectively, so that the base rod 181 can pivot relative to the base 182 and fold relative to each other. Optionally, the base rod 181 may be a tubular member (i.e., having a hollow structure) or a solid rod, but this disclosure is not limited thereto.

[0261] In one specific example, the bottom frame 180 includes four base posts 181, one end (i.e., the inner end) of each base post 181 being pivotally connected to the base 182, and the other end (i.e., the outer end) being pivotally connected to the lower end of the foot 190 or the upright 110. Optionally, the four base posts 181 are symmetrically arranged relative to the base 182 in the longitudinal direction D1 and the transverse direction D2 of the collapsible crib 100. When the bottom frame 180 is in the locked state (see...), Figure 1 When the crib 100 is in the unfolded state, the foldable crib 100 can remain in the unfolded state. When the bottom frame 180 is in the unlocked state (not shown), the bottom rod 181 can pivot relative to the base 182 and fold relative to each other, for example by moving the base 182 upward (i.e., along the...). Figure 1 The force F shown pulls the base 182 upwards, thereby driving the upright mechanism and subsequently causing the entire crib 100 to fold down. The specific folding process will be described in detail below. Figures 7 to 9 The description will not be detailed here.

[0262] Figure 2 for Figure 1 The front view of the armrest mechanism of the collapsible crib 100 shown is shown. Figure 3A for Figure 2 A partial sectional view of the handrail mechanism shown. Figure 3B for Figure 3A An enlarged view of part A shown. Figure 3C for Figure 3A A schematic diagram of the triangles formed by the corresponding pivot points is shown. Figure 4A for Figure 3A The view shown depicts the armrest mechanism in its folded state. Figure 4B for Figure 4A A schematic diagram of the triangles formed by the corresponding pivot points, and Figure 5 This is a front view of the mounting bracket 120.

[0263] Reference Figures 1 to 3B The handrail mechanism includes a fixed base 120, a handrail tube 130, and a linkage mechanism 150. In this embodiment, the handrail tube 130 is symmetrically arranged on both sides of the fixed base 120 along its centerline C1 in the transverse direction (i.e., its width direction). Specifically, one end of the handrail tube 130 is pivotally connected to a column mechanism (e.g., column 110 or corner piece 140), for example, see [reference needed]. Figure 3A The third pivot point P3. The other end of the handrail tube 130 is movably connected to the fixed base 120. In one example, the other end of the handrail tube 130 is pivotally connected to the fixed base 120, for example, to the fourth pivot point P4 via the first fastener 101, see [reference]. Figure 3A and Figure 3BFurthermore, the other end of the handrail tube 130 can be slidably pivotally connected to the fixing base 120. For example, an elongated hole 131, that is, a hole extending along the length direction of the handrail tube 130, can be provided at the position where the handrail tube 130 connects to the fixing base 120. The first fastener 101 is fixedly connected to the fixing base 120 and is slidably disposed in the elongated hole 131. In other words, combined with Figure 2 and Figure 3B As shown, the first fastener 101 can pass through the elongated hole 131 provided on the handrail tube 130 and slide within the elongated hole 131, and is fixedly connected to the fixed base 120, so that the handrail tube 130 can both pivot relative to the fixed base 120 and slide along the lateral direction of the fixed base 120. Of course, in other embodiments, the elongated hole 131 can also be provided on the fixed base 120, and this disclosure is not limited to this, as long as the pivoting and sliding engagement of the handrail tube 130 relative to the fixed base 120 can be realized simultaneously.

[0264] In this embodiment, as Figure 2 As shown, the fixed base 120 may be provided with a first connecting groove, such as the first sliding groove 121 in this embodiment. The other end of the handrail tube 130 (i.e., the end connected to the fixed base 120) is correspondingly provided with a connecting member, such as the first connecting member 132 in this embodiment. In this embodiment, the first sliding groove 121 is located on the fixed base 120 near the first fastener 101, and the first connecting member 132 is located on the handrail tube 130 near the elongated hole 131, and the first connecting member 132 is fixedly connected to the handrail tube 130. The first connecting member 132 can be accommodated in the first sliding groove 121 and can slide within the first sliding groove 121. For example, the fixed base 120 may be provided with two first sliding grooves 121, symmetrically arranged with respect to the center line C1 of the fixed base 120, to correspond respectively to the first connecting member 132 of each handrail tube 130 on both sides. Optionally, as... Figure 3A As shown, a first connector 132 located at the other end of the handrail tube 130 is spaced apart from the elongated hole 131 (and the first fastener 101 accommodated therein). For example, the first connector 132 is positioned further away from the end of the handrail tube 130 that connects to the post 110 relative to the elongated hole 131. In one example, the first connector 132 may be a pin, rivet, screw, etc., but this disclosure is not limited thereto.

[0265] Specifically, further integration Figures 2 to 4A The first connector 132 has a locked position and an unlocked position in the first sliding groove 121. When the first connector 132 is in the locked position (see...), Figure 2When the first connector 132 is in the unlocked position (see [reference]), the handrail tube 130 can be locked relative to the fixed base 120 and the upright 110, meaning it cannot pivot relative to the fixed base 120 and / or the upright 110. Figure 4A When the crib is folded up, the armrest tube 130 can pivot relative to the fixed seat 120 and the upright 110 so as to fold up the foldable crib 100.

[0266] In one example, such as Figure 5 As shown, the first sliding groove 121 may include a first groove segment 121a and a second groove segment 121b. The first groove segment 121a is parallel to the length direction of the handrail tube 130 in the unfolded state (i.e., the extension direction of the handrail tube 130 in the unfolded state), and the second groove segment 121b is set at an angle to the first groove segment 121a. Optionally, the second groove segment 121b extends downward from one end (e.g., the outer end) of the first groove segment 121a and is in an outwardly curved arc shape, that is, one end of the arc is located at the outer end of the first groove segment 121a, while the other end of the arc extends further outward (outward in the lateral direction D1) relative to the outer end. For example, the second groove segments 121b of the two first sliding grooves 121 can form a splayed structure. The two opposite ends of the first groove segment 121a (i.e., the inner end and the outer end in the lateral direction of the fixing seat 120) constitute the locking position and the unlocking position of the first connector 132. Specifically, the end of the first groove segment 121a furthest from the second groove segment 121b (e.g., the inner end) corresponds to the locked position, while the end where the first groove segment 121a connects to the second groove segment 121b (e.g., the outer end) corresponds to the unlocked position. That is, the second groove segment 121b connects to the first groove segment 121a at the end of the first groove segment 121a corresponding to the unlocked position. In other examples, the second groove segment 121b is straight, in which case the length of the elongated hole 131 needs to be longer.

[0267] Furthermore, the connection between the handrail tube 130 and the fixed base 120 disclosed herein is not limited to the above-described connection method. In other examples, both ends of the handrail tube 130 can be pivotally connected to the fixed base 120 via a single pivot point; that is, the other end of the handrail tube 130 can also be pivotally connected to the fixed base 120 and cannot slide. On the lower side of the handrail tube 130, another rod (or tube) is provided, which is pivotally and slidably connected to the fixed base 120. The end of this other rod (or tube) is provided with two connectors, which are respectively connected to the first sliding groove 121 and the elongated hole 131, to achieve locking and unlocking of the handrail tube 130.

[0268] like Figures 3A to 4AAs shown, the linkage mechanism 150 can be configured to assist in the folding and unfolding of the collapsible crib 100, specifically by driving the armrest tube 130 to lock and unlock. The linkage mechanism 150 can be movably disposed on the armrest tube 130, for example, at least a portion of which can be slidably disposed relative to the armrest tube 130. One end of the linkage mechanism 150 can be pivotally connected to the column mechanism, and the other end can be pivotally connected to the mounting base 120. For example, one end of the linkage mechanism 150 is pivotally connected to the corner piece 140 (or column 110) of the column mechanism (see [reference]). Figure 3A The fifth pivot point P5 in the middle), and the other end is pivotally connected to the fixed base 120 via the second fastener 102 (see the fifth pivot point P5 in the middle), while the other end is pivotally connected to the fixed base 120 via the second fastener 102 (see the fifth pivot point P5 in the middle). Figure 3A The sixth pivot point P6 in the structure is provided, wherein the second fastener 102 can be fixed to the fixing seat 120. In one example, the linkage mechanism 150 may include a linkage rod 151 and linkage members 152 and 153. The linkage rod 151 extends in a direction parallel to the handrail tube 130, and at least a portion of the linkage members 152 and 153 extends in a direction not parallel to the linkage rod 151. Optionally, at least a portion of the linkage mechanism 150 is disposed within the handrail tube 130 and is slidable relative to the handrail tube 130. For example, the linkage rod 151 is slidably disposed within the handrail tube 130. The linkage rod 151 may be a tubular member with a hollow structure or a rod member with a non-hollow structure, but this disclosure is not limited thereto. The linkage rod 151 may also have other arrangements, for example, the linkage rod 151 may have a hollow structure and be slidably sleeved outside the handrail tube 130.

[0269] In one example, combining Figure 3A and Figure 3B And further reference Figure 4A The linkages 152 and 153 may include a first linkage 152 and a second linkage 153. The first linkage 152 and the second linkage 153 are respectively connected to both ends of the linkage 151. Specifically, one end of the first linkage 152 is pivotally connected to the column mechanism, specifically to the corner piece 140 or the column 110 of the column mechanism, as shown in [reference needed]. Figure 3A The fifth pivot point P5. Further, the fifth pivot point P5 and the third pivot point P3 (i.e., the pivot point between the handrail tube 130 and the column mechanism) can be spaced apart in the vertical direction D3. Optionally, the fifth pivot point P5 and the third pivot point P3 can also be spaced apart in the horizontal direction D1. The other end of the first linkage 152 is pivotally connected to the first end of the linkage 151, see [reference needed]. Figure 3AThe first pivot point P1 is located in the center. One end of the second linkage 153 is pivotally connected to the fixed base 120, for example, via the second fastener 102, to the sixth pivot point P6. Further, the sixth pivot point P6 and the fourth pivot point P4 (i.e., the pivot point between the handrail tube 130 and the fixed base 120) can be spaced apart in the vertical direction D3. Optionally, the sixth pivot point P6 and the fourth pivot point P4 can also be spaced apart in the horizontal direction D1. The other end of the second linkage 153 is pivotally connected to the second end of the linkage 151, as shown in [reference needed]. Figure 3A The second pivot point P2 in the middle.

[0270] During the transition of the collapsible crib 100 from an unfolded state to a folded state, or vice versa, the linkage 151 moves relative to the armrest tube 130, such as sliding within the armrest tube 130, so that the positions of the first pivot point P1 and the second pivot point P2 relative to the armrest tube 130 in a direction parallel to the armrest tube 130 continuously change. For example, the positions of the first pivot point P1 and the second pivot point P2 when the crib 100 is in the folded state are farther away from the connection between the armrest tube 130 and the column mechanism, such as the position where the corner piece 140 is located, than their positions when the crib 100 is in the unfolded state. Specifically, in this embodiment, during the transition of the crib 100 from the unfolded state to the folded state, the first pivot point P1 and the second pivot point P2 continuously move away from the connection between the armrest tube 130 and the column mechanism relative to the armrest tube 130, in other words, continuously move closer to the connection between the armrest tube 130 and the fixed base 120. In other embodiments, during the transition of the crib 100 from an unfolded state to a folded state, the first pivot point P1 and the second pivot point P2 may also have opposite positional changes relative to the armrest tube 130.

[0271] In this embodiment, since at least a portion of the first linkage 152 extends non-parallel to the armrest tube 130, when the first pivot point P1 moves away from the connection between the armrest tube 130 and the column mechanism relative to the armrest tube 130, the linkage mechanism 150 will pivot together with the armrest tube 130, thereby realizing the final folding of the crib 100. Specifically, in this embodiment, due to the vertical (i.e., vertical direction D3) relative positional relationship between the first linkage 152 and the armrest tube 130, the horizontal relative positional relationship between the locking and unlocking positions of the armrest tube 130 (such as the first connector 132 fixedly disposed at one end) in the first sliding groove 121, and the locking and unlocking achieved by the shape and arrangement of the armrest tube 130 or the linkage and their shape matching with the first sliding groove 121, the end of the linkage mechanism 150 connected to the fixed seat 120, together with the end of the armrest tube 130 connected to the fixed seat 120, can pivot downward together to realize the folding of the crib 100. Furthermore, by modifying the above factors or their combination, the same or other pivoting forms of the linkage mechanism 150 and the armrest tube 130 can also be achieved, which will not be elaborated here.

[0272] Optionally, slots are provided at positions corresponding to the first end (i.e., the end connected to the first linkage 152) and the second end (i.e., the end connected to the second linkage 153) of the handrail tube 130, so that the first linkage 152 and the second linkage 153 can extend out of the handrail tube 130. Specifically, as shown in the figure... Figure 3A As shown, the slot can be provided on the lower side of the handrail tube 130 so that the first linkage 152 and the second linkage 153 extend from below the handrail tube 130 and can avoid the first linkage 152 and the second linkage 153 when the linkage 151 moves relative to the handrail tube 130.

[0273] In one example, the line connecting the first pivot point P1, the third pivot point P3, and the fifth pivot point P5 forms a first triangle T1, and the line connecting the second pivot point P2, the fourth pivot point P4, and the sixth pivot point P6 forms a second triangle T2. During the switching between the unfolded and folded states of the collapsible crib 100, the angles of the various corners of the first triangle T1 and the second triangle T2 continuously change.

[0274] Specifically, such as Figure 3C and Figure 4BAs shown, in the first triangle T1, the angle between the line connecting pivot points P1 and P3 and the line connecting pivot points P1 and P5 (i.e., the angle of the first triangle T1 at the first pivot point P1) is angle α1, the angle between the line connecting pivot points P1 and P3 and the line connecting pivot points P3 and P5 (i.e., the angle of the first triangle T1 at the third pivot point P3) is angle α3, and the angle between the line connecting pivot points P3 and P5 and the line connecting pivot points P1 and P5 (i.e., the angle of the first triangle T1 at the fifth pivot point P5) is angle α5. Accordingly, in the second triangle T2, the angle between the line connecting pivot points P2 and P4 and the line connecting pivot points P2 and P6 (i.e., the angle of the second triangle T2 at the second pivot point P2) is angle α2, the angle between the line connecting pivot points P2 and P4 and the line connecting pivot points P4 and P6 (i.e., the angle of the second triangle T2 at the fourth pivot point P4) is angle α4, and the angle between the line connecting pivot points P2 and P6 and the line connecting pivot points P4 and P6 (i.e., the angle of the second triangle T2 at the sixth pivot point P6) is angle α6.

[0275] Further integration Figure 3A , Figure 3C and Figure 4A and Figure 4B When the crib is 100 in the Figure 3A The unfolded state shown has been switched to Figure 4A During the folding process shown, angle α3 of the first triangle T1 and angle α6 of the second triangle T2 gradually decrease, while angles α5 and α4 gradually increase, and angles α1 and α2 first increase and then decrease. When the crib is in the unfolded state, angle α3 can be an obtuse angle or a right angle. When the crib 100 needs to be folded, the armrest tube 130 is released relative to the fixed base 120, that is, the first connector 132 moves from the locked position to the released position in the first sliding groove 121, causing angle α1 to increase, angle α3 to decrease, and angle α5 to increase, and causing angle α2 to increase, angle α4 to increase, and angle α6 to decrease. At this time, the upright 110 (and its top corner piece 140) can pivot relative to the armrest tube 130, and the armrest tube 130 can pivot relative to the fixed base 120. As the upright 110, armrest tube 130, and fixed base 120 retract relative to each other, the linkage 151 moves relative to the armrest tube 130 toward the fixed base 120 under the action of the first linkage 152 and the second linkage 153, causing angle α3 to further decrease, angle α5 to further increase, angle α4 to further increase, and angle α6 to further decrease, until the crib 100 is fully retracted. During this period, angles α1 and α2 will undergo a process of first increasing and then decreasing.

[0276] Combination Figures 3A to 4AOptionally, the foldable crib 100 may further include a synchronization component 170. In this embodiment, four synchronization components 170 are provided, each corresponding to an armrest mechanism. Each synchronization component 170 includes two synchronizing elements 171 and 172 arranged in a cross configuration. One end of each of the two synchronizing elements 171 and 172 is pivotally connected to an armrest tube 130, and the other end of each is pivotally and slidably connected to a fixed base 120. Specifically, the synchronizing elements 171 and 172 may include a first synchronizing element 171 and a second synchronizing element 172, which are intersected and symmetrically arranged relative to the center line C1 in the lateral direction of the fixed base 120; that is, the intersection point of the first synchronizing element 171 and the second synchronizing element 172 is located on the center line C1.

[0277] In this embodiment, the first synchronizer 171 and the second synchronizer 172 have the same structure and are arranged symmetrically and intersecting each other. For example, the first synchronizer 171 and the second synchronizer 172 can be elongated sheet-like pieces. For ease of explanation, the following description will mainly focus on the first synchronizer 171. One end of the first synchronizer 171 is pivotally connected to the handrail tube 130 via the first connector 132, and its other end is pivotally and slidably connected to the fixed base 120 via the second fastener 102. Figures 3A to 4A As shown, the first synchronizing member 171 may be provided with a second sliding groove 171a and a third sliding groove 171b. In one example, the third sliding groove 171b is provided at an interval from the second sliding groove 171a. For example, the third sliding groove 171b may be located at or near the end of the first synchronizing member 171 that is pivotally connected to the handrail tube 130, while the second sliding groove 171a may be provided at the other end of the first synchronizing member 171 (i.e., the end opposite to the end that is pivotally connected to the handrail tube 130). Specifically, the second sliding groove 171a is provided near the connection between the second linkage member 153 and the fixed seat 120. Optionally, the second fastener 102 on the fixed seat 120 (where the second linkage member 153 is pivotally connected to the fixed seat 120 via the second fastener 102) is provided in the second sliding groove 171a and is capable of sliding and pivoting relative to the second sliding groove 171a, see the sixth pivot point P6. In other words, the first synchronizing element 171 is slidably and pivotally connected to the lower end of the fixed base via the second fastener 102. However, the second fastener 102 may not pass through the second sliding groove 171a. For example, an additional fastener may be provided to pass through the second sliding groove 171a in order to achieve the slidable and pivotal connection of the first synchronizing element 171 to the lower end of the fixed base.

[0278] Furthermore, the two third sliding grooves (i.e., the third sliding groove 171b of the first synchronizer 171 and the third sliding groove 172b of the second synchronizer 172) can be arranged crosswise. For example, during the folding or unfolding of the collapsible crib 100, the intersection of the two third sliding grooves can always be located at the center line C1 of the fixed base 120. Optionally, a third fastener 103 is provided at the intersection of the two third sliding grooves, and both the first synchronizer 171 and the second synchronizer 172 can pivot and slide relative to the third fastener 103. In one example, a guide groove 122 can be provided on the fixed base 120, and the third fastener 103 is disposed in the guide groove 122 and can move within the guide groove 122. Optionally, the guide groove 122 can extend along the vertical direction of the fixed base 120. Additionally or alternatively, the guide groove 122 can extend along the center line C1 of the fixed base 120. When the handrail tube 130 pivots and retracts relative to the fixed base 120, the third fastener 103 can slide within the guide groove 122.

[0279] In other words, the third fastener 103 can pass through the third sliding grooves provided on the first synchronizing member 171 and the second synchronizing member 172, and the guide groove 122 provided on the fixing base 120, and can slide within the guide groove 122. Figure 3B As shown, when the armrest tube 130 is locked relative to the fixed base 120, i.e., when the crib 100 is in the unfolded state, the third fastener 103 is located at the uppermost end of the guide groove 122 and at the end of the third sliding groove 171b closest to the first connector 132 (i.e., the end where the first synchronizing member 171 is connected to the armrest tube 130). Figure 4A As shown, when the handrail tubes 130 are retracted relative to each other, that is, when they are pivoted relative to the fixed seat 120 to a position close to each other, the third fastener 103 is located at the lowest end of the guide groove 122 and at the end of the third sliding groove 171b furthest from the first connector 132.

[0280] Specifically, during the folding and closing of the crib 100, as the armrest tube 130 pivots relative to the upright 110 and the fixed seat 120, the linkage 151 moves within the armrest tube 130 toward the fixed seat 120. The second linkage 153 pivots relative to the fixed seat 120, allowing the second fastener 102, pivotally connected between the second linkage 153 and the fixed seat 120, to slide within the second sliding groove 171a of the first synchronizing member 171, for example, moving further away from the pivoting end of the armrest tube 130. This causes the first synchronizing member 171 to pivot and move relative to the fixed seat 120. Simultaneously, the third fastener 103 also slides synchronously within the third sliding groove 171b, with its sliding direction being the same as that of the second fastener 102 within the second sliding groove 171a. During the folding and closing process of the crib 100, as the ends of the armrest tubes 130 on both sides of the fixed base 120 move from the first groove segment 121a to the second groove segment 121b, the ends of the armrest tubes 130 on both sides drive the first connecting members 132 on both sides to move downward relative to the fixed base 120. This causes the first synchronizing member 171 and the second synchronizing member 172 to rotate downward, and also causes the third fastener 103 to move downward along the guide groove 122. Since the third fastener 103 always abuts against the uppermost end of the third sliding grooves 171b and 172b during the pivoting process, the first synchronizing member 171 and the second synchronizing member 172 always rotate downward synchronously, so that the armrest tubes 130 on both sides always close synchronously.

[0281] Figure 6A and Figure 6B This is a partial perspective view of the handrail mechanism according to the first embodiment of this disclosure, wherein... Figure 6A The outer casing of the mounting base 120 has been removed so that the internal structure of the mounting base 120 can be shown from the front side of the mounting base 120.

[0282] In a specific example, refer to Figure 6A and Figure 6B Each of the first synchronizing element 171 and the second synchronizing element 172 may have a single-layer sheet structure and at least partially pass through the corresponding handrail tube 130. For example, at least a portion of each of the first synchronizing element 171 and the second synchronizing element 172 may extend from the corresponding handrail tube 130. More specifically, a notch may be provided at the end of the handrail tube 130 where it connects to the first synchronizing element 171 and / or the second synchronizing element 172 to accommodate and avoid the movement trajectory of the first synchronizing element 171 and / or the second synchronizing element 172.

[0283] In addition, such as Figure 6A and Figure 6BAs shown, the handrail mechanism may also be provided with a wear-resistant member 104 to prevent or at least reduce friction between the components and / or to limit the movement of the components. In one example, the wear-resistant member 104 may be provided on the third fastener 103, for example, sleeved on the third fastener 103, to prevent or at least reduce friction with the first synchronizing member 171 and / or the second synchronizing member 172 and / or the second linkage member 153, and / or to limit their movement. Optionally, the wear-resistant member 104 provided on the third fastener 103 may space the first synchronizing member 171 and the second synchronizing member 172 from each other in the extending direction of the third fastener 103. Optionally, the wear-resistant member 104 may be a washer, but this disclosure is not limited thereto.

[0284] Figures 7 to 9 This describes the folding process of the collapsible crib 100 disclosed herein. To facilitate explanation of the structural changes in the armrest mechanism during the folding process, Figures 7 to 9 Neither the bottom frame 180 nor the base 190 is shown. Specifically, Figures 7 to 9 The images show the state and relative position of the armrest mechanism and uprights 110 of the crib 10 when it is unfolded, during the folding process, and after it is folded.

[0285] Combination Figure 1 , Figure 3A , Figure 4A and Figures 7 to 9 When the crib 100 needs to be folded up, the user can fold it up by operating the base 182. Specifically, as shown... Figure 1 As shown, a user can pull the base 182 with an upward force F, for example, to pivot the base rod 181 relative to the base 182, thereby causing the bottom of the column 110 to move inward. In this embodiment, the user can pull the base 182 upward with one hand. However, it should be understood that in other embodiments, the direction of the force applied to the base 182 can be changed, for example, downward, etc., which will not be elaborated here.

[0286] At this time, refer to Figure 3A , Figure 7 and Figure 8Since the linkage mechanism 150 is connected to the corner piece 140 and the fixed base 120 respectively and cannot generate relative horizontal displacement, while the bottom of the column 110 moves inward, the upper end of the column 110, together with the corner piece 140, will pivot outward around the pivot point P5 of the linkage mechanism 150 and the corner piece 140. At this time, the armrest tube 130 will also be driven outward by the corner piece 140, so the first connector 132 located at the end of the armrest tube 130 will move outward along the first groove 121a to the unlocking position of the first groove 121a, so as to unlock the armrest tube 130. At this time, as the closing process continues, the first connector 132 will slide in the second groove 121b, thereby the armrest tube 130 will pivot relative to the corner piece 140 and the fixed base 120, and finally realize the overall closing of the crib 100 (see Figure 4A and Figure 9 Optionally, the synchronous component 170 can also be used to achieve synchronous folding of the handrail tubes 130 on both sides of the fixed base 120, making the folding process smoother.

[0287] Figure 10 This is a perspective view of a collapsible crib 200 according to a second embodiment of the present disclosure. Figure 11A and Figure 11B They are respectively Figure 10 The three-dimensional view shows the column 210 and the base 290 in different states.

[0288] like Figure 10 As shown, a collapsible crib 200 according to a second embodiment of the present disclosure is provided. The upright mechanism of the collapsible crib 200 may include an upright 210 and a base 290.

[0289] refer to Figure 11A and Figure 11B The base 290 can be pivotally connected to the upright 210. In one example, the base 290 can be positioned at the lower end of the upright 210 and can pivot relative to the upright 210, thereby reducing the packaging volume. A base rod 281 is connected to the base 290, for example, by fasteners. When the base rod 281 is pivoted and retracted, it causes the base 290 to pivot relative to the upright 210 (see [link to product description]). Figure 11B This design allows the column mechanism to be folded up, reducing its size at least in the vertical direction, thereby reducing packaging volume and making transportation more convenient.

[0290] Preferably, the base 290 may include a receiving recess 291 and a rolling element 292 at least partially received in the receiving recess 291. The rolling element 292 is at least partially exposed from the receiving recess 291, that is, at least partially protruding from the receiving recess 291. When the base 281 is in the extended position (see...), Figure 11AWhen the crib 100 is in contact with the ground, the bottom plane of the base 290 is on the ground, and the rolling element 292 does not contact the ground, thus preventing the crib 100 from moving. When the base rod 281 pivots and retracts, the base 290 pivots relative to the upright 210 (see...). Figure 11B For example, when pivoting inward, the rolling element 292 contacts the ground to assist in closing, making the closing process smoother. In one example, the rolling element 292 can be a wheel, but this disclosure is not limited thereto.

[0291] like Figure 10 As shown, a support member 283 may also be provided on the bottom frame 280, for example, on the base 282, so that the collapsible crib 100 can be more stably supported on the ground when unfolded.

[0292] Figure 12A and Figure 12B This is a partially exploded view of the handrail mechanism according to a second embodiment of the present disclosure. Specifically, Figure 12A The outer casing of the mounting base 220 has been removed to reveal its internal structure; and Figure 12B The handrail tube 230 on one side of the fixed base 220 was further removed. Figure 12A The first fastener 223 in the middle.

[0293] Reference Figure 10 and Figure 12A The handrail mechanism (e.g., fixed base 220) may also be provided with a first fixing member 223. The first fixing member 223 may be fixedly connected to the fixed base 220, for example, by a second fastener 202, and is disposed within the cavity of the fixed base 220 (e.g., the fixed base 220 may be sleeved on the outside of the first fixing member 223) to space the side wall of the fixed base 220 (i.e., the inner side wall of the outer shell) from the first synchronizing member 271 and / or the second synchronizing member 272, thereby positioning the first synchronizing member 271 and / or the second synchronizing member 272 to ensure smooth and stable movement. Optionally, the first fixing member 223 may also space the side wall of the fixed base 220 from the various components of the linkage mechanism. In one example, the first fixing member 223 may be made of materials such as plastic, resin, or rubber.

[0294] For example, such as Figure 12A As shown, the first fastener 223 may have a transverse section 223a extending in the transverse direction D1, and optionally, a vertical section 223b extending in the vertical direction D3. Both ends of the transverse section 223a may be fixed to the mounting base by second fasteners 202 (see...). Figure 10(220). One end of the vertical section 223b can be fixedly connected to one side of the horizontal section 223a, for example, the upper side of the horizontal section 223a. That is, the vertical section 223b can extend upward from the upper side of the horizontal section 223a. The other end of the vertical section 223b is disposed between the adjacent ends of the two handrail tubes 130 connected to the same fixing base 120. Further, a through hole 223c can be provided on the vertical section 223b. The through hole 223c can be configured to penetrate the first fixing member 223 along the thickness direction (e.g., the longitudinal direction D2) of the first fixing member 223, and the third fastener 203 passing through the guide groove of the fixing base 220 and the third sliding groove of the two synchronizing members can also pass through the through hole 223c of the vertical section 223b. In one example, the first fixing member 223 can be an integrally formed component, that is, the horizontal section 223a and the vertical section 223b are integrally formed.

[0295] Optionally, the first fixing member 223 may have a multi-layer structure, for example, having multiple layers spaced apart from each other in its thickness direction. The second linkage member 253, the first synchronization member 271, and the second synchronization member 272 connected to the fixing seat 120 may be located in different intervals formed by different adjacent layers, thereby separating the side wall of the fixing seat 220 located outside the first fixing member 223 from the first synchronization member 271, the second synchronization member 272, and / or the second linkage member 253, thereby positioning these components and improving the smoothness of their movement.

[0296] Optionally or alternatively, the first fastener 223 may be integrally formed with the fixing base 220. For example, the fixing base 220 may be formed as an integrally formed structure having multiple spacer layers inside.

[0297] In addition, such as Figure 12A and Figure 12BAs shown, a second fastener 224 may also be provided on the handrail mechanism. The second fastener 224 is fixedly connected to the handrail tube 230, and one end of it (i.e., the end located at or near the end of the handrail tube 230 connected to the fixing seat 220) has an opening. Specifically, the opening may be configured to extend outward from this end of the second fastener 224 to form a space for accommodating the first synchronizing member 271 and / or the second synchronizing member 272. In one example, the opening of the second fastener 224 may have a first connecting opening 224b and a second connecting opening 224c spaced apart from each other to accommodate the upper ends of the first synchronizing member 271 and the second synchronizing member 272 respectively, thereby separating them. Optionally, the second fastener 224 may include a shape-adapting member 224a, disposed in the opening and having the first connecting opening 224b, to adapt to the shape of the first synchronizing member 271 at the opening. The portion of the opening other than the shape-adapting member 224a is formed as the second connecting opening 224c. The shape-adaptive component 224a can be fixedly connected to the opening, or integrally formed with other parts of the second fastener 224, i.e., the second fastener 224 is an integrally formed structure. Optionally or alternatively, the second fastener 224 can be integrally formed with the handrail tube 230; and / or the second fastener 224 can be made of materials such as plastic, resin, or rubber.

[0298] also, Figure 13 This is a perspective view of the handrail mechanism according to the third embodiment of this disclosure.

[0299] like Figure 13 As shown, unlike the previous embodiment, the linkage mechanism 350 can also be an auxiliary tube 351 arranged parallel to the handrail tube 330. Specifically, one end of the auxiliary tube 351 can be pivotally connected to the column mechanism, i.e., the column 310 or the corner piece 340 fixedly connected to the column 310, and the other end of the auxiliary tube 351 can be pivotally connected to the fixed base 320.

[0300] refer to Figures 14A to 14C , Figure 14A This is a perspective view of the armrest mechanism according to the fourth embodiment of the present disclosure. Figure 14B To observe from another perspective Figure 14A The armrest mechanism shown, and Figure 14C for Figure 14A Another perspective view of the armrest mechanism is shown, in which the fixing seat 420 has been removed to reveal its internal structure. Further, Figure 15 This is a perspective view of the first synchronization element 471 according to the fourth embodiment of this disclosure.

[0301] In a fourth embodiment of this disclosure, the armrest mechanism may include a fixed base 420, an armrest tube 430, and a linkage mechanism 450. Similar to the foregoing embodiments (e.g., the first embodiment), the linkage mechanism 450 may be configured to assist in the folding and unfolding of the collapsible crib; that is, the linkage mechanism 450 may be used to drive the armrest tube 430 to move when the upright mechanism (not shown) moves (e.g., pivots). One end of the linkage mechanism 450 may be pivotally connected to the upright mechanism, while the other end of the linkage mechanism 450 may be movably connected to the fixed base 420, for example, via a second fastener 402, such as pivotally connected to and optionally slidably connected to the fixed base 420.

[0302] like Figure 14A As shown, in this embodiment, the linkage mechanism 450 can be disposed on the handrail tube 430, and at least a portion thereof can slide relative to the handrail tube 430. Specifically, the linkage mechanism 450 may include a linkage rod 451, a first linkage member 452, and a second linkage member 453. The linkage rod 451 may extend in a direction parallel to the handrail tube 430, and at least a portion of each of the first linkage member 452 and the second linkage member 453 may extend in a direction non-parallel to the handrail tube 430. One end of each of the first linkage member 452 and the second linkage member 453 is pivotally connected to both ends of the linkage rod 451, the other end of the first linkage member 452 is pivotally connected to the column mechanism, and the other end of the second linkage member 453 is pivotally connected to the fixed seat 420 so as to pivot as the linkage rod 451 slides on the handrail tube 430. Optionally, the linkage rod 451 in this embodiment may have a tubular structure and be slidably sleeved on the outside of the handrail tube 430. For example, the linkage 451 may be a plastic sleeve with a hollow structure that is fitted outside the handrail tube 430, but this disclosure is not limited thereto. The linkage 451 may also be made of other materials or have other shapes that are able to slide outside the handrail tube 430 and relative to the handrail tube 430.

[0303] refer to Figure 14B and Figure 14C In this embodiment, a synchronization component 470 may also be provided to enable the handrail mechanisms located at both ends of the fixed base 420 to retract or extend synchronously. The synchronization component 470 includes a first synchronization element 471 and a second synchronization element 472 (hereinafter referred to as "synchronization elements") arranged in a cross configuration. One end of each of the first synchronization element 471 and the second synchronization element 472 is pivotally connected to the handrail tube 430, and the other end of each is movably (e.g., pivotally and slidably) connected to the fixed base 420.

[0304] Further integration Figure 14B , Figure 14C and Figure 15Unlike the synchronization component 170 of the first embodiment, the synchronization members 471 and 472 of this embodiment may have a width in the diameter direction of the handrail tube 430 to make the connection between the handrail tube 430 and the synchronization members 471 and 472 more stable. For example, taking the first synchronization member 471 as an example, the first synchronization member 471 may have two parallel sheet-like members. Specifically, the first synchronization member 471 may include a first sheet-like member 471c, a second sheet-like member 471d, and a connecting piece 471e connecting the first sheet-like member 471c and the second sheet-like member 471d. The first sheet-like member 471c and the second sheet-like member 471d are located on both sides of the handrail tube 430 in its diameter direction. The connecting piece 471e spans the diameter of the handrail tube 430 to connect the first sheet-like member 471c and the second sheet-like member 471d into one piece. In one example, the connecting piece 471e may be disposed on the underside of the first piece 471c and the second piece 471d, and optionally, extend along a portion of the underside of the first piece 471c and the second piece 471d. Optionally, the first synchronizing member 471 is an integral structure. Optionally or alternatively, the first piece 471c, the second piece 471d, and the connecting piece 471e of the first synchronizing member 471 are separate components and assembled together. The second synchronizing member 472 may have the same structure as the first synchronizing member 471 and be arranged in a mirror image symmetrical to the first synchronizing member 472, which will not be described in detail here. In addition, regarding the specific connection method between each piece of the synchronizing members 471 and 472 and the fixing seat 420, the handrail tube 430, and / or the linkage mechanism 450, please refer to the synchronizing component 170 in the aforementioned first embodiment, except that the pieces in this embodiment are respectively disposed on both sides of the handrail tube 430 along its diameter direction, rather than passing through the handrail tube 430.

[0305] In one example, such as Figure 14C As shown, the first linkage 452 and / or the second linkage 453 may have a width (i.e., a widened profile) in the diametrical direction of the handrail tube 430 to accommodate the width of the first synchronizing member 471 and / or the second synchronizing member 472, thereby connecting (e.g., being clamped) more stably between the two sheet-like pieces of the first synchronizing member 471 and / or the second synchronizing member 472.

[0306] By designing such synchronizing components 471, 472 and / or linkage components 452, 453, the various structures of the handrail mechanism and their connection with the synchronizing component 470 are made more stable, avoiding swaying in the front-to-back direction during sliding and / or pivoting. Furthermore, based on the design of this embodiment, wear-resistant components 104 (such as washers) as described in the first embodiment can be omitted, making the structure simpler and assembly easier.

[0307] Furthermore, refer to Figure 16 and Figure 17A and Figure 17B , Figure 16 A perspective view of the linkage 551 according to the fifth embodiment of this disclosure, and Figure 17A and Figure 17B for Figure 16 The diagram shows a perspective view of the linkage 551 installed in the collapsible crib 500.

[0308] Combination Figures 16 to 17B The linkage 551 may have a tubular structure sleeved on the outside of the armrest tube 530. In this embodiment (a variation of the fourth embodiment), a notch 551a may be provided along the length direction on the linkage 551 to expose at least a portion of the armrest tube 530 from the tubular structure of the linkage 551, thereby providing connection space for the accessory 505 so that the accessory 505 can engage with the armrest tube 530 when the crib is unfolded, that is, it can engage with the armrest tube 530 exposed from the notch 551a. Furthermore, as... Figure 17A and Figure 17B As shown, a fixing part 530a may also be provided on the handrail tube 530 for fixing the accessory 505. In one example, the fixing part 530a may be located at the position of the handrail tube 530 corresponding to the notch 551a, that is, when the linkage rod 551 is installed on the handrail tube 530, the fixing part 530a can be exposed through the notch 551a. For example, the fixing part 530a may be a hole or a recess for the corresponding structure of the accessory 505 to engage. In this embodiment, the fixing part 530a is an elongated recess that extends along the length direction of the handrail tube 530. And two fixing parts 530a are provided on each handrail tube 530, the two fixing parts 530a being spaced apart and arranged side by side along the length direction of the handrail tube 530. However, this disclosure is not limited to this, and the fixing part 530a may also have other structures according to the needs of the accessory 505.

[0309] It should be noted that, where there is no structural conflict, the relevant structures in the first to fifth embodiments of this disclosure may be used optionally, in combination, or alternatively. For example, the armrest mechanism of the fourth and / or fifth embodiments of this disclosure may replace the armrest mechanism or a part thereof as described in the first embodiment for use in the retractable crib 100; and / or, the corresponding structures as described in the second and / or third embodiments may be adopted, which will not be specifically described here.

[0310] refer to Figures 18 to 21 , Figure 18 A front view of the armrest mechanism of a collapsible crib according to the sixth embodiment of this disclosure; Figure 19A for Figure 18 Another front view of the armrest mechanism shown, in which the front mounting base 620 has been removed to show the structure of the synchronization component 670; Figure 19Bfor Figure 19A An enlarged view of part B shown; Figure 19C for Figure 19A A 3D view of the synchronization components shown; Figure 20A and Figure 20B They are respectively Figure 19A A partial view of the collapsible crib in its folded state is shown to illustrate the synchronization components and the structure connected to them; and Figure 21 for Figure 18 The front view of the mounting bracket 620 shown.

[0311] The collapsible crib of this embodiment may include a column mechanism and an armrest mechanism, with the armrest mechanism connected between the column mechanisms, for example, between the upper ends or tops of two column mechanisms. The column mechanism may include a column 610, and without structural conflict, the specific structure of the column mechanism and its connection method with the armrest mechanism (and optional bottom frame) can be similar to any of the foregoing embodiments, and therefore will not be described in detail here.

[0312] refer to Figures 18 to 19B The handrail mechanism includes a fixed base 620, a handrail tube 630, and a linkage mechanism 650. The handrail tubes 630 are arranged on both sides of the fixed base 620 in the transverse direction, for example, symmetrically arranged at both ends of the fixed base 620 with respect to the center line C6. Specifically, as... Figure 18 As shown, one end of the handrail tube 630 is pivotally connected to the column mechanism (including the column 610 and optional corner piece 640), while the other end is movably connected (e.g., pivotally connected) to the fixed base 620 via a first fastener 601. In one example, combined with Figure 18 and Figure 19A The handrail tube 630 is slidably pivotally connected to the fixed base 620. Optionally, an elongated hole 631 can be provided at the end of the handrail tube 630 connected to the fixed base 620 (i.e., the "other end" of the handrail tube 630). The elongated hole 631 can extend along the length of the handrail tube 630, allowing the first fastener 601 fixed to the fixed base 620 to slide through the elongated hole 631, thereby realizing the pivoting and sliding of the handrail tube 630 relative to the fixed base 620. In a specific example, combined with Figure 19A and Figure 20A When the handrail mechanism is in the extended state, the first fastener 601 is located at the end of the elongated hole 631 closest to the column mechanism (i.e., the first end); while when the handrail mechanism is in the retracted state, the first fastener 601 is located at the end of the elongated hole 631 furthest from the column mechanism (i.e., the second end). Other structures of the handrail tube 630 and the linkage mechanism 650 can be referred to the corresponding structures of any one or more of the foregoing embodiments (such as the first embodiment or the fourth embodiment), and will not be repeated here.

[0313] Combination Figure 18, Figure 19A and Figure 21 The fixing base 620 may be provided with a first connecting groove, and each handrail tube 630 has a corresponding connecting member at one end (i.e., the other end) connected to the fixing base 620. The connecting member can slide relative to the first connecting groove and has a locked position and an unlocked position. Specifically, in this embodiment, the first connecting groove may be configured as a first sliding groove 621 in which the connecting member can slide, and the connecting member may be referred to as a first connecting member 632. The first connecting member 632 can be accommodated in the first sliding groove 621 and can slide in the first sliding groove 621 as the handrail tube 630 is closed and opened. The first sliding groove 621 is provided at a position of the fixing base 620 near the first fastener 601, and the first connecting member 632 is provided at a position of the handrail tube 630 near the elongated hole 631, and the first connecting member 632 is fixedly connected to the handrail tube 630. For example, the fixing base 620 may be provided with two symmetrically arranged first sliding grooves 621 to correspond to the first connecting member 632 of each handrail tube 630 on both sides, respectively. Optionally, the first connector 632 is positioned at one end further away from the column mechanism relative to the elongated hole 631. The first connector 632 may be a pin, rivet, screw, etc., but this disclosure is not limited thereto.

[0314] Further reference Figure 22A and Figure 22B , Figure 22A and Figure 22B These are schematic diagrams showing the unfolded and folded states of the collapsible crib according to the sixth embodiment of this disclosure.

[0315] Similar to the first embodiment described above, the first connector 632 in this embodiment can also have a locked position and an unlocked position in the first sliding groove 621. When the first connector 632 is in the locked position (see, for example, see...), Figure 22A When the first connector 632 is in the unlocked position (see, for example, see...), the handrail tube 630 can be locked relative to the fixed base 620 and the column mechanism. Figure 22B When the crib is folded up, the armrest tube 630 can pivot relative to the fixed base 620 and the column mechanism (including the column 610) to fold up the foldable crib.

[0316] In a specific example, combined Figure 21 and Figure 22A and Figure 22BIn this embodiment, the first sliding groove 621 may include a first groove segment 621a and a second groove segment 621b. The first groove segment 621a is parallel to the extension direction of the handrail tube 630 in the unfolded state, and the second groove segment 621b is angled to the first groove segment 621a. Optionally, the second groove segment 621b extends downward from one end (e.g., the outer end) of the first groove segment 621a and is in an outwardly curved arc shape. The two opposite ends of the first groove segment 621a (i.e., the inner end and the outer end in the lateral direction of the fixing base 620) constitute the locking position of the first connector 632 (see...). Figure 22A ) and release position (see Figure 22B That is, the end of the first groove segment 621a away from the second groove segment 621b (such as the inner end) corresponds to the locked position, while the end of the first groove segment 621a connected to the second groove segment 621b (such as the outer end) corresponds to the unlocked position. In one example, the fixed base 620 may be provided with two symmetrically arranged first sliding grooves 621, wherein the two first sliding grooves 621 (especially their second groove segment 621b) may form a splayed structure.

[0317] In an alternative embodiment, the first sliding groove 621 may not have a first groove segment 621a, and the handrail tube 630 may achieve locking and unlocking through other structures.

[0318] Return to reference Figures 19A to 20B The foldable crib may also include a synchronization assembly 670. In this embodiment, the foldable crib may have four synchronization assemblies 670, each corresponding to an armrest mechanism. Each synchronization assembly 670 includes two synchronizing elements, which in this embodiment are two synchronizing gears, namely, a first synchronizing gear 671 and a second synchronizing gear 672. The first synchronizing gear 671 and the second synchronizing gear 672 can rotate synchronously, for example, they mesh with each other, and are respectively linked to an armrest tube 630, so that the two armrest tubes 630 located on both sides of the fixed base 620 can be folded or unfolded synchronously. Specifically, as... Figure 19B and Figure 20A As shown, the first synchronizing gear 671 can be rotatably connected to the fixed base 620 via a first rotating shaft 673 (e.g., centered on the first rotating shaft 673), and the second synchronizing gear 672 can be rotatably connected to the fixed base 620 via a second rotating shaft 674 (e.g., centered on the second rotating shaft 674). In a specific example, as... Figure 19C and Figure 20B The first synchronous gear 671 and the second synchronous gear 672 can each be composed of two plate gears, which are respectively connected to both sides of the handrail tube 630 along its diameter direction, thereby increasing the connection stability between the synchronous gears 671 and 672.

[0319] In addition, such as Figure 19A and Figure 19B As shown, the first synchronous gear 671 is provided with a first linkage groove 671a, for example, near the outer diameter of the first synchronous gear 671. Similarly, the second synchronous gear 672 is provided with a second linkage groove 672a, for example, near the outer diameter of the second synchronous gear 672. The first connector 632 fixed to the handrail tube 630 can be movably disposed in the first linkage groove 671a and the second linkage groove 672a respectively, so that the rotation of the corresponding handrail tube 630 can drive the first synchronous gear 671 and / or the second synchronous gear 672 to rotate, and thereby drive the other synchronous gear through the linkage between the first synchronous gear 671 and the second synchronous gear 672. In one example, the first linkage groove 671a and / or the second linkage groove 672a may be a through hole or through hole through which the first connector 632 passes (i.e., through the extension 671b of the first synchronizing gear 671), but this disclosure is not limited to this. It may also be provided as a recess or protrusion that does not pass through the first synchronizing gear 671 and / or the second synchronizing gear 672, depending on the shape or structure of the first connector 632.

[0320] With the above configuration, the first synchronizing gear 671 is rotatably connected to the fixed base 620 via the first rotating shaft 673, and the second synchronizing gear 672 is rotatably connected to the fixed base 620 via the second rotating shaft 674. The handrail tubes 630 located on both sides of the fixed base 620 are pivotally connected to the fixed base 620 via the first fasteners 601. The first connecting pieces 632 fixed to one end of each of the two handrail tubes 630 are slidably disposed in the first linkage groove 671a and the second linkage groove 672a, respectively. Thus, when the handrail tubes 630 can be folded relative to each other... When the first connector 632 is in the unlocked position, the handrail tube 630 rotates, and through the engagement of the first linkage groove 671a and / or the second linkage groove 672a with the first fastener 601, it drives at least one of the synchronous gears (671 and / or 672). Then, through the meshing between the two synchronous gears 671 and 672, it drives the other synchronous gear (672 and / or 671) to rotate. The other synchronous gear then drives the corresponding other handrail tube 630 to move, thereby realizing the synchronous movement of the two handrail tubes 630 located on both sides of the fixed base 620.

[0321] In one example, such as Figure 19B and Figure 20AAs shown, the first linkage groove 671a can be configured to extend in the diametrical direction of the first synchronizing gear 671, and the second linkage groove 672a is configured to extend in the diametrical direction of the second synchronizing gear 672, such that the first connecting member 632 can slide in the first linkage groove 671a and / or the second linkage groove 672a along the diametrical direction of the synchronizing gears 671 and 672. Specifically, the first synchronizing gear 671 can have an extension 671b extending outward from its outer diameter, at least a portion of the first linkage groove 671a is located on the extension 671b and extends in the diametrical direction of the first synchronizing gear 671. Similarly, the second synchronizing gear 672 can have a similar structure, which will not be described in detail here. Optionally, the first linkage groove 671a and the second linkage groove 672a are arranged in a mirror-symmetrical manner. For example, when the armrest mechanism is in the unfolded state (see...), Figure 19B When the first linkage groove 671a and the second linkage groove 672a are located at the upper ends of the first synchronous gear 671 and the second synchronous gear 672, respectively, the armrest mechanism gradually changes from the unfolded state to the retracted state (see...). Figure 20B During the process, the first linkage groove 671a changes as the first synchronous gear 671 rotates counterclockwise, and simultaneously, the second linkage groove 672a changes as the second synchronous gear 672 rotates clockwise, so that the first linkage groove 671a and the second linkage groove 672a are always mirror-symmetrical with respect to the meshing position of the synchronous gears 671 and 672. In one example, when the armrest mechanism is in the retracted state, the first linkage groove 671a and the second linkage groove 672a can be in approximately the same horizontal position, but this disclosure is not limited to this.

[0322] refer to Figure 23A and Figure 23B , Figure 23A A front view of the synchronization component 770 of a collapsible crib according to the seventh embodiment of this disclosure, and Figure 23B for Figure 23A The synchronization component 770 shown is a front view in another state. It should be noted that the synchronization component 770 of this embodiment can be applied to other structures of the collapsible crib of the foregoing embodiments (such as the first embodiment or the sixth embodiment). That is, it can be used as an alternative example of the synchronization component 770 in the foregoing embodiments. Therefore, the following description will mainly focus on its structure that is different from the foregoing embodiments, and other details will not be repeated.

[0323] like Figure 23A and Figure 23BAs shown, the synchronization component 770 may include two synchronization gears 771 and 772, namely a first synchronization gear 771 and a second synchronization gear 772. The first synchronization gear 771 and the second synchronization gear 772 can each be linked to a handrail tube 730. Specifically, the first synchronization gear 771 and the second synchronization gear 772 can each be rotatably connected to a fixed base 720 via a rotating shaft, and in this embodiment, the rotating shaft can be a first fastener 701. The first synchronization gear 771 and the second synchronization gear 772 are connected to each other via a transmission device to enable them to rotate synchronously. In one example, the transmission device can be a transmission belt 775, and the transmission belt 775 will not slide relative to the first synchronization gear 771 and the second synchronization gear 772 to ensure the synchronization effect between them. For example, the transmission belt 775 can be fixedly connected to the first synchronization gear 771 and the second synchronization gear 772. Figure 23A As shown, two transmission belts 775 are provided. One belt is fixedly connected to the upper side of the first synchronous gear 771 and the lower side of the second synchronous gear 772, and the other belt is fixedly connected to the lower side of the first synchronous gear 771 and the upper side of the second synchronous gear 772. Optionally, the transmission belt 775 can be a belt, chain, etc. However, it should be understood that the transmission device of this disclosure is not limited to the above structure, as long as it can achieve synchronous rotation between the first synchronous gear 771 and the second synchronous gear 772. For example, the transmission belt 775 can also be a single cross-belt.

[0324] Further reference Figures 24 to 28 , Figure 24 for Figure 23A The cross-sectional view of the first synchronizing gear 771 shown is shown. Figure 25 for Figure 23A The first synchronizing gear 771 shown is a perspective view. Figure 26A and Figure 26B These are front views of the first synchronizing gear 771 at different positions on the handrail tube 730. Figure 27 This is a partial cross-sectional view of the armrest mechanism according to the seventh embodiment of this disclosure, and Figure 28 This is a perspective view of a fixed seat provided on a handrail mechanism according to the seventh embodiment of this disclosure.

[0325] Combination Figure 24 , Figure 25 and Figure 27 Synchronous gears 771 and 772 can be equipped with a locking mechanism 760 between them and the corresponding handrail tubes 730, so that the rotation of the handrail tubes 730 can drive the synchronous gears 771 and 772 to rotate.

[0326] For example, taking the first synchronizing gear 771 as an example (the second synchronizing gear 772 can have the same structure, which will not be described in detail here), the engaging mechanism 760 includes a first engaging member 761 disposed on the handrail tube 730 and a second engaging member 762 disposed on the first synchronizing gear 771. The first engaging member 761 and the second engaging member 762 are movably engaged with each other. In one example, such as Figure 24 and Figure 27 As shown, the first mating member 761 can be a sliding groove provided on the handrail tube 730. For example, the sliding groove can extend in the length direction of the handrail tube 730. Accordingly, as Figure 25 and Figure 27 As shown, the second mating part 762 can be a sliding protrusion provided on the first synchronizing gear 771.

[0327] Optionally, such as Figure 25 As shown, two sliding protrusions can be provided on the first synchronizing gear 771, and these two sliding protrusions can be located on a diameter line C7 passing through the center of the first synchronizing gear 771. Correspondingly, two sliding grooves can be provided on the handrail tube 730, each corresponding to one of the sliding protrusions. This allows the handrail tube 730 to move outward for unlocking without affecting the engagement between the handrail tube 730 and the synchronizing gear, and increases the stability of the engagement between the first synchronizing gear 771 and the handrail tube 730, thereby improving the synchronization rate of their synchronous rotation. Alternatively, the two sliding protrusions can be located on a straight line perpendicular to the length of the handrail tube, without passing through the center of the gear, instead of on a diameter line C7 passing through the center of the first synchronizing gear 771.

[0328] In addition, it should be noted that the positions of the sliding protrusion and the sliding groove as described above can be interchanged, or the first mating part and the second mating part can also be other types of structures, such as hook mating, etc., and this disclosure is not limited thereto.

[0329] With this configuration, when the handrail tubes 730 need to be folded together, the first mating part 761 (e.g., a sliding groove) on the handrail tube 730 drives the first synchronous gear 771 (or the second synchronous gear 772) to rotate through the engagement with the second mating part 762 (sliding protrusion). In turn, the transmission device 775 drives the second synchronous gear 772 (or the first synchronous gear 771) to move synchronously, thereby realizing the synchronous rotation and folding of the handrail tubes 730 on both sides of the fixed base 720.

[0330] Similar to the aforementioned embodiments, and referring to Figures 26A to 27In this embodiment, an elongated hole 731 may also be provided on the handrail tube 730, which extends along the length of the handrail tube 730. A first fastener 701, serving as a rotation axis and fixed to the fixing base 720, is slidably disposed in the elongated hole 731, allowing the handrail tube 730 to slide relative to the fixing base 720. Specifically, during the retraction or unfolding of the handrail tube 730, the handrail tube 730 can move relative to the fixing base 720 through the elongated hole 731. For example, Figure 26A The diagram shows the first position of the first synchronizing gear 771 (and the first fastener 701, which serves as its rotation axis) relative to the elongated hole 731 when the armrest tube 730 is in the unfolded state. Figure 26B The diagram shows a second position of the first synchronizing gear 772 (and the first fastener 701) relative to the elongated hole 731 when the armrest tube 730 is in the retracted state. The first and second positions can be located at opposite ends of the elongated hole 731. However, the relative positions of the first synchronizing gear 771 and the second synchronizing gear 772 remain unchanged during retraction or extension.

[0331] refer to Figures 29 to 31 , Figure 29 A front view of the armrest mechanism of a collapsible crib according to the eighth embodiment of this disclosure; and Figure 30 and Figure 31 for Figure 29 The handrail mechanism shown (specifically) Figure 29 Part C) is a magnified view of a section in different states. For example, Figure 30 The handrail mechanism is in a locked state, while Figure 31 The handrail mechanism is in the unlocked state.

[0332] In this embodiment, the foldable crib may include a column mechanism and an armrest mechanism. Specifically, the armrest mechanism may be disposed between the column mechanisms; for example, each armrest mechanism may be connected between two column mechanisms (such as their upper ends or tops). The column mechanism may include a column 810, and optionally, a corner bracket 840. Where there is no structural conflict, the column mechanism of this embodiment may have a structure similar to that of the foregoing embodiments, and may adopt a similar arrangement (e.g., connection with the bottom frame, etc.) as in the foregoing embodiments, and therefore will not be described in detail.

[0333] like Figure 29As shown, the armrest mechanism includes a fixed base 820, an armrest tube 830, and a linkage mechanism 850. The armrest tube 830 is disposed on both sides of the fixed base 820 and connects the column mechanism to the fixed base 820. In one example, the armrest tube 830 may be configured to be symmetrically connected to both ends of the fixed base 820 relative to its centerline C8 in the lateral direction. The linkage mechanism 850 assists in the folding and unfolding of the collapsible crib. One end of the linkage mechanism 850 is pivotally connected to the column mechanism, such as the column 810 and / or the corner piece 840. The other end of the linkage mechanism 850 is pivotally connected to both ends of the fixed base 820, wherein the connection positions of the linkage mechanism 850 and the fixed base 820 are spaced apart from the connection positions of the armrest tube 830 and the fixed base 820.

[0334] Reference Figure 29 and Figure 30 One end of the handrail tube 830 is pivotally connected to the column 810 and / or the corner piece 840 of the column mechanism, while the other end is movably connected to the fixed base 820, for example, via a first fastener 801. The first fastener 801 can be a fastening device fixedly mounted on the fixed base 820, such as a screw, pin, or fastening post. In one example, the handrail tube 830 is slidably pivotally connected to the fixed base 820, that is, the handrail tube 830 can both slide relative to the fixed base 820 and pivot relative to the fixed base 820. The specific connection method between the handrail tube 830 and the fixed base 820 will be described below. Figures 32 to 34 Describe it.

[0335] like Figure 30 and Figure 31 As shown, a first connecting groove may be provided on the fixing base 820, and a connecting member is correspondingly provided at the end of each handrail tube 830 that connects to the fixing base 820. The connecting member can slide relative to the first connecting groove and has a locked position and an unlocked position. In this embodiment, the first connecting groove may be a first locking groove 821 for locking the connecting member, and the connecting member may be referred to as a second connecting member 833. The second connecting member 833 is fixedly connected to the handrail tube 830. For example, the second connecting member 833 may be a locking pin, a locking rod, a screw, a rivet, etc.

[0336] like Figure 31As shown, the first locking groove 821 can be provided at the edge of the fixing base 820, for example, it can be configured as a groove or notch extending inward from the edge of the fixing base 820. In one example, when the armrest mechanism is in the extended position, the first locking groove 821 can be at approximately the same horizontal height as the armrest tube 830 (especially the second connector 833 provided thereon), so as to lock (e.g., engage) the second connector 833 fixed to the armrest tube 830 in the first locking groove 821. Specifically, the fixing base 820 can be provided with two symmetrically arranged first locking grooves 821, corresponding to the second connectors 833 provided on the two side armrest tubes 830 respectively. Optionally, the first locking groove 821 is provided at a position of the fixing base 820 near the first fastener 801. When the second connector 833 engages with the first locking groove 821 (i.e., the second connector 833 is locked in the first locking groove 821), the second connector 833 and the first fastener 801 are spaced apart from each other.

[0337] More specifically, when the second connector 833 is in the locked position (see, for example, see...) Figure 30 When the second connector 833 is locked (e.g., engaged) in the first locking slot 821, the handrail tube 830 is locked relative to the fixed base 820 and the column mechanism. When the second connector 833 is in the unlocked position (see, for example, see...), the handrail tube 830 is locked relative to the fixed base 820 and the column mechanism. Figure 31 When the second connector 833 disengages from the first locking groove 821, the armrest tube 830 can pivot relative to the fixed seat 820 and the column mechanism, thereby folding up the foldable crib.

[0338] refer to Figures 32 to 34 , Figures 32 to 34 for Figure 29 The enlarged views of the handrail mechanism in different states are shown, in which the front fixing seat 820 has been removed to show the internal structure of the handrail mechanism.

[0339] like Figures 32 to 34As shown, the handrail tube 830 is slidably pivotally connected to the fixed base 820. The handrail tube 830 has an elongated hole 831 for connection to a first fastener 801 fixedly mounted on the fixed base 820. Optionally, the elongated hole 831 is a hole extending along the length of the handrail tube 830. The first fastener 801 is slidably disposed in the elongated hole 831, that is, the first fastener 801 can be connected to the handrail tube 830 by passing through the elongated hole 831 and can slide within the elongated hole 831, allowing the handrail tube 830 to both pivot and slide relative to the fixed base 820, for example, sliding along the lateral direction of the fixed base 820. Optionally, the elongated hole 831 (and the first fastener 801 accommodated therein) and the second connector 833 are spaced apart from each other. For example, the second connector 833 is closer to the end of the handrail tube 830 connected to the column mechanism than the elongated hole 831. Optionally or additionally, when the second connector 833 engages with the first locking groove 821, the second connector 833 and the elongated hole 831 (and the first fastener 801) are at approximately the same horizontal level.

[0340] It should be noted that in other embodiments, the elongated hole 831 may also be provided on the fixed base 820. This disclosure is not limited to this, as long as the pivoting and sliding of the handrail tube 830 relative to the fixed base 820 can be realized simultaneously.

[0341] like Figure 32 As shown, the foldable crib may also include a synchronization assembly 870. The synchronization assembly 870 includes two synchronizing elements, such as two synchronizing gears, namely, a first synchronizing gear 871 and a second synchronizing gear 872. In this embodiment, the first synchronizing gear 871 and the second synchronizing gear 872 engage with each other (e.g., mesh with each other) to rotate synchronously, and are respectively linked to an armrest tube 830, so that the two armrest tubes 830 connected to both sides of the mounting base 820 can be folded or unfolded synchronously.

[0342] Specifically, in combination Figure 32 , Figure 35 and Figure 36 ,in Figure 32 The front view of the synchronization component 870 mounted on the mounting base 820 is shown. Figure 35 Show Figure 32 A perspective view of the synchronizing gears (such as the first synchronizing gear 871 and / or the second synchronizing gear 872). Figure 36 Show along Figure 32The cross-sectional view is taken by line XX. The first synchronizing gear 871 can be pivotally connected to the fixed base 820 via a first rotating shaft 873 (e.g., centered on the first rotating shaft 873), while the second synchronizing gear 872 can be pivotally connected to the fixed base 820 via a second rotating shaft 874 (e.g., centered on the second rotating shaft 874). Specifically, the first rotating shaft 873 can be disposed on the first synchronizing gear 871, and the second rotating shaft 874 can be disposed on the second synchronizing gear 872, to engage with corresponding holes on the fixed base 820, thereby realizing the rotational connection between the first synchronizing gear 871 and the second synchronizing gear 872 and the fixed base 820. In one example, as... Figure 35 and Figure 36 As shown, the first rotating shaft 873 and / or the second rotating shaft 874 can be a columnar structure protruding from the outer surface of the first synchronous gear 871 and / or the second synchronous gear 872, or it can be a connecting pin passing through the first synchronous gear 871 and / or the second synchronous gear 872, but this disclosure is not limited thereto. Furthermore, the first synchronous gear 871 and the second synchronous gear 872 can have the same structure, or they can have similar but different structures, such as having different rotating shafts. Optionally, at least a portion of the circumference of the first synchronous gear 871 and the second synchronous gear 872 has meshing teeth, for example, meshing teeth are provided at least at the positions where they mesh with each other.

[0343] In this disclosure, the collapsible crib may be provided with four synchronization components 870, and each synchronization component 870 corresponds to an armrest mechanism. In this embodiment, the four synchronization components 870 may have the same structure, but this disclosure is not limited thereto. The synchronization components 870 may each have different structures, for example, having the same structure as the synchronization components in any of the foregoing embodiments.

[0344] like Figure 35 and Figure 36 As shown, taking the first synchronizing gear 871 as an example, the first synchronizing gear 871 is provided with a first linkage groove 871a, for example, near the outer diameter of the first synchronizing gear 871. Specifically, further referring to the reference... Figures 32 to 34The first synchronizing gear 871 may have an extension 871b extending outward from its outer diameter. A first linkage groove 871a is located on the extension 871b and extends along the extension 871b in the diametrical direction of the first synchronizing gear 871. Correspondingly, a plastic inner plug is provided at the end of the handrail tube 830. The plastic inner plug partially passes through the handrail tube 830 and is fixed by a second connector 833. The portion of the plastic inner plug exposed outside the handrail tube 830 is provided with a first connector 832. The first connector 832 is movably connected to the first linkage groove 871a, for example, slidably accommodated in the first linkage groove 871a. Of course, the first connector 832 may also be provided in other ways, for example, the first connector 832 may be a connecting post fixedly provided on the outer surface of the handrail tube 830, or a protrusion protruding from the outer surface of the handrail tube 830.

[0345] like Figure 32 and Figure 36 As shown, the first connector 832 can be disposed at the end of the handrail tube 830. Optionally, the first connector 832 is disposed further away from the end of the handrail tube 830 that is connected to the post 810 than the first fastener 801 and the second connector 833.

[0346] Optionally, the first connector 832 may be integrally formed with the handrail tube 830. Optionally or alternatively, the first connector 832 may also be detachably connected to the handrail tube 830, for example, as a connecting pin passing through the handrail tube 830, but this disclosure is not limited thereto.

[0347] In one specific example, the first linkage groove 871a may be a groove or recess extending along the diameter direction of the first synchronizing gear 871, and optionally, the first linkage groove 871a may be disposed on the extension 871b. That is, the first linkage groove 871a does not penetrate the extension 871b. However, this disclosure is not limited to this, and it may also have the same structure as the first linkage groove 671a in the aforementioned sixth embodiment, and the first linkage groove 871a may also penetrate the extension 871b.

[0348] Similarly, the second synchronizing gear 872 is provided with a second linkage groove, which has the same structure as the first linkage groove 871a. The second linkage groove is also movably connected to the first connecting member. Optionally, the first linkage groove 871a and the second linkage groove can be arranged in a mirror-symmetrical manner, for example, along the center line C8 in the lateral direction relative to the fixed base 820.

[0349] For example, in conjunction with reference Figures 32 to 35 When the armrest mechanism is in the extended state, the first linkage groove 871a and the second linkage groove are located at the upper ends of the first synchronous gear 871 and the second synchronous gear 872, respectively (refer to the position of the extension 871b); and when the armrest mechanism is in the extended state (see... Figure 32Gradually transition to the closed state (see...) Figure 33 and Figure 34 During the process, the relative position of the first linkage groove 871a and the first connecting member 832 changes as the first synchronous gear 871 rotates counterclockwise, and synchronously, the relative position of the second linkage groove and the first connecting member changes as the second synchronous gear 872 rotates clockwise, so that the first linkage groove 871a and the second linkage groove are always mirror-symmetrical with respect to the position where the synchronous gears 871 and 872 mesh with each other (e.g., center line C8).

[0350] The following will be further referenced. Figure 37 and Figure 38 This describes the unfolded and folded states of the collapsible crib according to the eighth embodiment of this disclosure. Specifically, Figure 37 This is a schematic diagram of the handrail mechanism in this embodiment when it is unfolded. Figure 38 for Figure 37 The diagram shows the armrest mechanism when it is closed.

[0351] like Figure 37 As shown, when the second connector 833 is in the locked position, it engages with the first locking groove 821, locking the armrest tube 830 relative to the fixed base 820 and the column mechanism (including the column 810 and / or the corner piece 840), thereby placing the armrest mechanism (and the entire collapsible crib) in the unfolded state. Reference Figure 38 and further combined Figure 31 and Figures 32 to 34 When the foldable crib needs to be folded, the armrest tubes 830 on both sides are moved outward (e.g., pulled) to disengage the second connector 833 from the first locking groove 821, that is, to move the second connector 833 to the unlocked position, allowing the armrest tube 830 to pivot relative to the fixed base 820 and the column mechanism until it pivots to the desired position. Figure 38 The position shown is (i.e., the foldable crib is in the folded state). Simultaneously, by providing a synchronization component 870, specifically a first synchronization gear 871 and a second synchronization gear 872 that engage with each other, when one armrest tube 830 pivots relative to the fixed base 820, it can drive the other armrest tube 830 to pivot synchronously, so that the two armrest tubes 830 on both sides of the fixed base 820 move synchronously, thereby achieving synchronous folding of the various armrest mechanisms of the foldable crib. Correspondingly, the synchronization component 870 can also achieve synchronous unfolding of the various armrest mechanisms of the foldable crib.

[0352] The ninth embodiment of this disclosure is described below.

[0353] refer to Figure 39A and Figure 39BThe collapsible crib 400s includes a support column mechanism, which includes support columns 410s. Optionally, the collapsible crib 400s may include four support columns 410s, but this application is not limited thereto. The support columns 410s may be substantially perpendicular to the ground and are used to support the collapsible crib 400s. The four support columns 410s may together form a quadrilateral structure (e.g., a rectangular structure), but this application is not limited thereto. The support column mechanism may also include multiple support columns, such as six or eight, thereby forming a hexagonal or octagonal crib structure.

[0354] The collapsible crib 400s includes armrest tubes 430s, which are connected between the upper ends of every two uprights 410s. The interior of the armrest tubes 430s may be hollow. The armrest tubes 430s may be substantially parallel to the ground or substantially perpendicular to the uprights 410s. The armrest tubes 430s may include a first armrest tube 430as and a second armrest tube 430bs. Figure 39A As shown, the first armrest tube 430as can be located on the right side of the fixed base 420s (described in detail below), and the second armrest tube 430bs can be located on the left side of the fixed base 420s. The foldable crib 400s can have a folded state and an unfolded state (described in detail below).

[0355] In some embodiments, the collapsible crib 400s may include corner brackets 440s. The corner brackets 440s may be fixedly connected to the upper end (i.e., the end away from the ground) of the uprights 410s. When viewed from above, the corner brackets 440s may be formed in a right-angle bend shape, and the corners of the corner brackets 440s are rounded. The crib 400s may have four corner brackets 440s, respectively disposed at the upper ends of the four uprights 410s, but this application is not limited thereto. Armrest tubes 430s may be pivotally connected to the corner brackets 440s. An armrest tube 430s may be pivotally connected to each side of the corner of each corner bracket 440s; in other words, a corner bracket 440s may be pivotally connected to each end of the armrest tube 430s.

[0356] The collapsible crib 400s includes fixed seats 420s. Specifically, the collapsible crib 400s may include four fixed seats 420s, but this application is not limited thereto. Each fixed seat 420s is pivotally connected on both sides between a first armrest tube 430as and a second armrest tube 430bs, such that there is a first armrest tube 430as, a second armrest tube 430bs, and a fixed seat 420s between every two corner members 440s.

[0357] In some embodiments, the fixing base 420s can be locked and unlocked with the ends of the first armrest tube 430as and the second armrest tube 430bs, thereby enabling the collapsible crib 400s to switch between an unfolded state and a folded state. Specifically, when the fixing base 420s is locked relative to the armrest tube 430s, the collapsible crib 400s can be kept in the unfolded state, and when the fixing base 420s is unlocked relative to the armrest tube 430s, the collapsible crib 400s can be switched from the unfolded state to the folded state.

[0358] In some embodiments, the collapsible crib 400s may further include a bottom frame 480s. The bottom frame 480s may include bottom rods 481s and a base 482s. Specifically, the bottom frame 480s may include four bottom rods 481s and one base 482s, but this application is not limited thereto. One end of each bottom rod 481s is pivotally connected to the base 482s, and the other end of each bottom rod 481s is pivotally connected to the lower end of the upright 410s. The bottom rods 481s are connected to the upright 410s near the end of the upright 410s that contacts the ground. When viewed from above, the bottom frame 480s may be formed in a shape similar to the letter "X". The bottom frame 480s may have a locked state and an unlocked state. The bottom rods 481s may be tubular (i.e., have a hollow structure) or solid rods, but this disclosure is not limited thereto. In some embodiments, when the crib 400s is in the unfolded state, the bottom frame 480s can be locked to help keep the crib 400s unfolded; and when the bottom frame 480s is in the unlocked state, the bottom frame 480s can be operated to drive the fixing seat 420s and the armrest tube 430s to unlock relative to each other, thereby enabling the entire collapsible crib 400s to be folded and unfolded.

[0359] In some embodiments, see Figure 39B and Figure 41The foldable crib 400s may also include a linkage mechanism 450s. The linkage mechanism 450s may include a linkage rod 451s, a first linkage member 452s, and a second linkage member 453s. Each first armrest tube 430As and each second armrest tube 430Bs is provided with a corresponding linkage mechanism 450s. The linkage rod 451s is slidably disposed relative to the armrest tube 430s; for example, the linkage rod 451s may be disposed inside the armrest tube 430s or sleeved outside the armrest tube 430s. A first linkage member 452s is pivotally connected to one end of each linkage rod 451s near the top corner member 440s, and a second linkage member 453s is pivotally connected to one end of each linkage rod 451s near the fixed base 420s. The end of the first linkage member 452s away from the linkage rod 451s is pivotally connected to the top corner member 440s. The first linkage 452s is connected to the corner member 440s at a position lower than the position where the handrail tube 430s is connected to the corner member 440s. In other words, the first linkage 452s is connected to the corner member 440s closer to the ground than the position where the handrail tube 430s is connected to the corner member 440s. The end of the second linkage 453s away from the linkage 451s is pivotally connected to the fixed base 420s. In some embodiments, the first linkage 452s and the second linkage 453s may be formed as straight sheets, but this application is not limited thereto. In other embodiments, the first linkage 452s and / or the second linkage 453s may be formed into a curved shape. The linkage 451s may be formed to match the internal space or external shape of the handrail tube 430s, thereby avoiding wobbling and noise when the linkage 451s slides relative to the handrail tube 430s.

[0360] In some embodiments, when the bottom frame 480s is released, by pulling the bottom frame 480s upward along the F direction, the bottom end of the upright 410s is folded inward, causing the upright 410s and the top corner piece 440s to pivot relative to the linkage mechanism 450s with the connection point between the first linkage 452s and the top corner piece 440s as the pivot point. This causes the armrest tube 430s, which is pivotally connected to the upper end of the top corner piece 440s, to move outward relative to the fixed seat 420s, so that the armrest tube 430s and the fixed seat 420s are released, and finally the collapsible crib 400s can be converted from the unfolded state to the folded state.

[0361] In some embodiments, see Figure 40 and Figure 47The mounting base 420s may include a mounting base housing 421s and a fastener 422s connected to the mounting base housing 421s. The mounting base housing 421s may be formed by bending a single piece, or it may be formed by, for example, two pieces fixedly connected together; this application is not limited thereto. The lower end (the end facing the ground) of the mounting base housing 421s may have an opening 4211s. The fastener 422s is configured to cover the opening 4211s. The fastener 422s includes a vertical extension for insertion into the mounting base housing 421s, and a horizontal extension for covering the opening 4211s. That is, the fastener 422s is inserted into the mounting base housing 421s through the opening 4211s. When viewed from the side of the mounting base housing 421s (i.e., from the side of the handrail tube 430s into which the mounting base housing 421s is inserted), the mounting base housing 421s may have a shape similar to the letter "U". Specifically, the mounting base housing 421s may include a first piece 4212s, a second piece 4213s, and a connecting piece 4214s. The first piece 4212s and the second piece 4213s may have the same shape, but this application is not limited thereto. Both the first piece 4212s and the second piece 4213s may be trapezoidal, but this application is not limited thereto. Optionally, both the first piece 4212s and the second piece 4213s may be rectangular. The connecting piece 4214s can connect the upper ends of the first piece 4212s and the second piece 4213s to each other. The upper two sides of the mounting base housing 421s can be connected to the first handrail tube 430as and the second handrail tube 430bs respectively by means of a first fastener 401s. The lower two sides of the mounting base housing 421s can be pivotally connected to two second linkages 453s respectively by means of a second fastener 402s. The second fastener 402s can constitute a pivot axis for the second linkage 453s to pivot relative to the fixed base housing 421s. The second fastener 402s can be a rivet, but this application is not limited thereto.

[0362] The fastener 422s may be made of plastic, but this application is not limited to this. The fastener 422s can be partially inserted into the housing 421s of the fixing seat from the opening 4211s, thereby closing the lower end of the fixing seat. This prevents the seat fabric from entering the fixing seat 420s and hindering the folding or unfolding of the collapsible crib 400s, and also prevents a person's hand from entering the fixing seat 420s and being injured. The outer surface of the portion of the fastener 422s outside the housing 421s of the fixing seat can be flush with the outer surface of the housing 421s of the fixing seat, thus providing a good tactile feel. The fastener 422s may include a first fastener 423s and a second fastener 424s. The first fastener 423s and the second fastener 424s may have the same shape. There may be a gap between the first fastener 423s and the second fastener 424s, so that the first synchronizing member 471s and the second synchronizing member 472s can be movably positioned between the first fastener 423s and the second fastener 424s. The first fixing member 423s and the second fixing member 424s can be fixed to the first piece 4212s and the second piece 4213s, respectively. The second fastener 402s can pass through both the first fixing member 423s and the second fixing member 424s simultaneously, fixing the first fixing member 423s and the second fixing member 424s to each other and to the mounting base housing 421s. The first fixing member 423s and the second fixing member 424s are configured to overlap each other. Two second linkage members 453s can be inserted from both sides between the first fixing member 423s and the second fixing member 424s.

[0363] See Figure 41 , Figure 42A and Figure 42BThe collapsible crib 400s also includes locking elements 432s. Specifically, each first armrest tube 430as and second armrest tube 430bs is provided with a corresponding locking element 432s, but this application is not limited thereto. The locking elements 432s are fixedly connected to the armrest tubes 430s. Each locking element 432s is fixed inside one end of an armrest tube 430s near the fixing base 420s. The locking elements 432s and the armrest tubes 430s are movably and pivotally connected to the fixing base 420s. Specifically, the locking elements 432s may have elongated holes or sliding grooves 431s (the armrest tubes 430s are also provided with corresponding elongated holes or sliding grooves). The elongated holes 431s may extend along the length of the armrest tubes 430s (i.e., when the collapsible crib 400s is unfolded, the elongated holes 431s extend in a generally horizontal direction). The first fastener 401s is fixedly connected to the upper part of the fixed base 420s and can be connected to the engaging member 432s and then to the handrail tube 430s by passing through the elongated hole 431s. The first fastener 401s can move and rotate in the elongated hole 431s, so the handrail tube 430s can move and pivot relative to the fixed base 420s (specifically, the fixed base housing 421s). The first fastener 401s can constitute the pivot axis for the handrail tube 430s to pivot relative to the fixed base housing 421s.

[0364] See Figure 42A , Figure 42B , Figure 45 and Figure 46The foldable crib 400s also includes a synchronization component 470s, which is configured to allow the armrest tubes (i.e., the first armrest tube 430as and the second armrest tube 430bs) on both sides of the fixed seat 420s to pivot and fold synchronously. Specifically, the foldable crib 400s may include four synchronization components 470s, that is, each armrest tube 430s corresponds to one synchronization component 470s, or each fixed seat 420s may correspond to one synchronization component 470s. The synchronization component 470s may include a first synchronization element 471s, a second synchronization element 472s, a third synchronization element 473s, and a fourth synchronization element 474s. The first synchronization element 471s, the second synchronization element 472s, the third synchronization element 473s, and the fourth synchronization element 474s may be formed as sheet bodies, specifically, they may be formed from iron sheets, but this application is not limited thereto. The first synchronizer 471s and the second synchronizer 472s may have symmetrical shapes and may be formed into curved shapes. The third synchronizer 473s and the fourth synchronizer 474s may have the same shape and may be formed into straight shapes. The lengths of the first synchronizer 471s and the second synchronizer 472s may be greater than those of the third synchronizer 473s and the fourth synchronizer 474s, but this application is not limited thereto. The first synchronizer 471s and the second synchronizer 472s may be bent along the length direction, such that the first synchronizer 471s and the second synchronizer 472s overlap each other at the first end and bend upward at the second end.

[0365] In some embodiments, the fixing member 422s may include a guide groove 425s. Alternatively, the guide groove 425s may also be provided on the fixing base 420s. The guide groove 425s is elongated and extends vertically (perpendicular to the ground). The first ends of the first synchronizing member 471s and the second synchronizing member 472s are movably connected to the fixing base 420s. Specifically, the first ends of the first synchronizing member 471s and the second synchronizing member 472s are pivotally and slidably connected to the fixing base 420s; the second ends of the first synchronizing member 471s and the second synchronizing member 472s are respectively pivotally connected to the handrail tube 430s, and more specifically, to the engaging member 432s. The first synchronizing member 471s and the second synchronizing member 472s are staggered. In some embodiments, the first ends of the first synchronizing member 471s and the second synchronizing member 472s are staggered. A third fastener 403s is provided at the intersection of the first synchronizing member 471s and the second synchronizing member 472s. The first synchronizing element 471s and the second synchronizing element 472s are pivotable relative to the third fastener 403s. The first ends of the first synchronizing element 471s and the second synchronizing element 472s are pivotally connected to each other by means of the third fastener 403s. The third fastener 403s is disposed within the guide groove 425s. When the first handrail tube 430as and / or the second handrail tube 430bs pivots relative to the fixed base 420s, the third fastener 403s slides within the guide groove 425s.

[0366] The first ends of the third synchronizer 473s and the fourth synchronizer 474s are pivotally connected to each other. The second end of the third synchronizer 473s is pivotally connected between the first end and the second end of the first synchronizer 471s, and the second end of the fourth synchronizer 474s is pivotally connected between the first end and the second end of the second synchronizer 472s. The first ends of the third synchronizer 473s and the fourth synchronizer 474s are pivotally connected to each other by means of a fourth fastener 404s and are confined within a guide groove 425s. Within the guide groove 425s, the first ends of the third synchronizer 473s and the fourth synchronizer 474s may be located above the first ends of the first synchronizer 471s and the second synchronizer 472s, but this application is not limited thereto. The second end of the third synchronizer 473s is pivotally connected to the first synchronizer 471s by means of a fifth fastener 405s. Specifically, the second end of the third synchronizer 473s is connected to a position between the first and second ends of the first synchronizer 471s, for example, near the third fastener 403s. The function of the synchronizer assembly 470s is to synchronize the movement of the first handrail tubes 430as and the second handrail tubes 430bs on both sides of the fixed base 420s. The arrangement of the third synchronizer 473s and the fourth synchronizer 474s can give the synchronizer assembly 470s a better synchronization effect. The second end of the fourth synchronizer 474s can be pivotally connected to the second synchronizer 472s by means of another fifth fastener 405s. Specifically, the second end of the fourth synchronizer 474s is connected to a position between the first and second ends of the second synchronizer 472s, for example, near the third fastener 403s. The second ends of the first synchronizer 471s and the second synchronizer 472s are pivotally connected to the first handrail tubes 430as and the second handrail tubes 430bs, respectively. The second end of the first synchronizer 471s (the end opposite to the first end) is movably connected to the first handrail tube 430as. Specifically, the second end of the first synchronizing element 471s can be pivotally connected to the end of the first handrail tube 430as via a sixth fastener 406s. The second end of the second synchronizing element 472s is movably connected to the end of the second handrail tube 430bs. Specifically, the second end of the second synchronizing element 472s can be pivotally connected to the end of the second handrail tube 430bs via a sixth fastener 406s. The first fastener 401s and the sixth fastener 406s can be located at approximately the same horizontal height, and the sixth fastener 406s is closer to the interior of the fixing base 420s than the first fastener 401s.

[0367] Taking the pivoting of the first handrail tube 430as as an example, the function of the synchronization component is explained. When the handrail tube 430as is unlocked and the first handrail tube 430as pivots relative to the fixed seat 420s, the handrail tube 430as drives the first synchronization member 471s, which is pivotally connected to it, to rotate and slide downwards. This causes the third fastener 403s to slide downwards, and at the same time, it causes the third synchronization member 473s to slide downwards and rotate. The downward sliding of the third fastener 403s will cause the second synchronization member 472s to slide downwards and rotate. Furthermore, the downward sliding and rotation of the third synchronization member 473s will cause the fourth synchronization member 474s to also slide downwards and rotate. The downward sliding and rotation of the fourth synchronization member 474s will also cause the second synchronization member 472s to slide downwards and rotate, further causing the second handrail tube 430bs to rotate relative to the fixed seat 420s, thereby realizing the synchronous closing of the first handrail tube 430as and the second handrail tube 430bs.

[0368] In some embodiments, such as Figure 42A As shown, the engaging member 432s is disposed within the handrail tube 430s. Optionally, the engaging member 432s may extend partially from the end of the handrail tube 430s. The side of the engaging member 432s facing the first synchronizing member 471s and the second synchronizing member 472s may have an abutting portion 433s. The abutting portion 433s may abut against one end of the first synchronizing member 471s and the second synchronizing member 472s, thereby making the rotation of the first synchronizing member 471s and the second synchronizing member 472s more stable. The upper side of the fixing member 422s may have a spacer portion 426s. The spacer portion 426s protrudes vertically upward from the fixing member 422s.

[0369] In some embodiments, the fastener 422s may have a bilaterally symmetrical shape. For example... Figure 42A As shown, the upper surfaces on both sides of the fastener 422s may respectively have a rotation guide surface 427s, a rotation stop surface 428s, and an engaging portion 429s. The rotation stop surface 428s is generally vertical and located outside the rotation guide surface 427s. The engaging portion 429s is generally horizontal and located inside the rotation guide surface 427s. The rotation stop surface 428s and the engaging portion 429s may be planar, but this application is not limited to this. The rotation guide surface 427s may be curved.

[0370] When the collapsible crib 400s is in the unfolded state, the partition 426s is located between the two armrest tubes 430s (the first armrest tube 430as and the second armrest tube 430bs). The lower side of the engaging member 432s is abutted by the engaging part 429s of the fixing member 422s, so that the armrest tubes 430s cannot pivot around the first fastener 401s. Optionally, the outer side of the partition 426s is formed with a flexible material to avoid noise caused by collision with the engaging member 432s.

[0371] In some embodiments, the fastener 422s includes a first fastener 423s and a second fastener 424s. Each of the first fastener 423s and the second fastener 424s may have a guide groove 425s, a spacer portion 426s, a rotation guide surface 427s, and a rotation stop surface 428s. Alternatively, only one of the first fastener 423s and the second fastener 424s may have the guide groove 425s, the spacer portion 426s, the rotation guide surface 427s, and the rotation stop surface 428s.

[0372] The following describes the folding and unfolding process of the foldable crib 400s.

[0373] During the transition of the collapsible crib 400s from the unfolded state to the folded state, the pivoting motion of one of the first armrest tubes 430as and the second armrest tubes 430bs relative to the fixed seat 420s drives the first synchronizing member 471s and the second synchronizing member 472s to move relative to the fixed seat 420s, thereby driving the other of the first armrest tubes 430as and the second armrest tubes 430bs to pivot relative to the fixed seat 420s, so as to achieve the synchronous folding of the first armrest tubes 430as and the second armrest tubes 430bs.

[0374] Specifically, see Figure 39A and Figure 39B When the crib can be folded up in 400 seconds, first release the base lock for 482 seconds, and then pull the base upwards for 482 seconds (as shown). Figure 39A (As indicated by arrow F in the diagram). The base rod 481s is driven by the base 482s, causing the lower end of the column 410s to tend to move inward, and causing the top corner piece 440s at the upper end of the column 410s to tend to pivot about the connecting axis between the first linkage 452s and the top corner piece 440s, which in turn pulls the handrail tube 430s outward (in a direction away from the fixed seat 420s).

[0375] See Figure 41 , Figure 42A and Figure 42B When the handrail tubes 430s (first handrail tube 430as and second handrail tube 430bs) on both sides of the fixed base 420s are pulled away from the fixed base 420s (this process can be referred to) Figures 42B to 42A During the process, the two handrail tubes 430s move outwards, so that the end of the engaging member 432s is above the rotation guide surface 427s and no longer contacts the engaging part 429s. At the same time, the first fastener 401s moves relative to the inner end of the elongated hole 431s to prevent the handrail tubes 430s from moving further away from the fixing base 420s. In addition, the second ends of the first synchronizing member 471s and the second synchronizing member 472s (the end connected to the sixth fastener 406s) move with the handrail tubes 430s.

[0376] Then, see Figure 43 and Figure 44 The fixed base 420s (or the fixed base 420s by its own weight) is pushed downwards, causing the handrail tube 430s to pivot relative to the first fastener 401s (the second handrail tube 430bs pivots clockwise, and the first handrail tube 430as pivots counterclockwise). Under the action of the synchronizing component 470s, one end of the two engaging pieces 432s on the handrail tubes 430s (the first handrail tube 430as and the second handrail tube 430bs) on both sides of the fixed base 420s moves synchronously along the two rotating guide surfaces 427s on both sides of the fixed piece 422s. The end of the engaging piece 432s that contacts the rotating guide surface 427s may have a profile that matches the rotating guide surface 427s. The second ends of the first synchronizer 471s and the second synchronizer 472s (the ends connected to the sixth fastener 406s) move further outward with the armrest tube 430s, and the first ends of the first synchronizer 471s and the second synchronizer 472s (the ends located within the guide groove 425s), as well as the ends of the third synchronizer 473s and the fourth synchronizer 474s located within the guide groove 425s, can move along the guide groove 425s. When the armrest tube 430s further pivots and abuts against the rotation stop surface 428s, the armrest tube 430s is blocked by the rotation stop surface 428s. In this way, the folding process of the collapsible crib 400s is completed, at which point all the uprights 410s are maximally close to each other and remain substantially vertical.

[0377] It is understandable that when the base 482s is released and pulled upward, each fixed seat 420s and the armrest tubes 430s on both sides (the first armrest tube 430as and the second armrest tube 430bs) can be folded up simultaneously.

[0378] When the collapsible crib 400s is unfolded, the fixed base 420s is pushed upwards, causing the first armrest tube 430as and the second armrest tube 430bs to pivot relative to the sixth fastener 406s (the second armrest tube 430bs pivots counterclockwise, and the first armrest tube 430as pivots clockwise). Under the action of the synchronizing component 470s, one end of each of the two engaging members 432s on the first armrest tube 430as and the second armrest tube 430bs moves synchronously along the two rotation guide surfaces 427s on both sides of the fixed component 422s. The second ends of the first synchronizing member 471s and the second synchronizing member 472s move inwards with the armrest tube 430s. When the armrest tube 430s further pivots to a substantially horizontal position, one end of the engaging member 432s extends out of the rotation guide surface 427s and is positioned above the engaging portion 429s.

[0379] Then, the base 482s can be pushed or pulled downwards. The base rod 481s is driven by the base 482s, causing the lower end of the column 410s to tend to move outwards, and causing the top corner piece 440s at the upper end of the column 410s to tend to pivot about the connecting axis between the first linkage 452s and the top corner piece 440s. This, in turn, pushes the armrest tube 430s inwards (along the direction closer to the fixed base 420s). Finally, the armrest tube 430s stops moving when the end of the engaging member 432s extending out of the armrest tube 430s abuts against the spacer 426s, or when the first fastener 401s moves to the outer end of the elongated hole 431s. At this time, the base 482s is in its lowest position and can be locked, thereby preventing the unfolded collapsible crib 400s from being accidentally folded.

[0380] The tenth embodiment of this disclosure is described below. Parts identical to those in the ninth embodiment will be omitted to avoid repetition.

[0381] See Figure 48 and Figure 49 The difference between the tenth embodiment and the ninth embodiment is that the synchronization component 470s of the collapsible crib 400s in the tenth embodiment only includes the first synchronization element 471s and the second synchronization element 472s, and does not include the third synchronization element 473s and the fourth synchronization element 474s. Thus, the guide groove 425s is limited to the first ends of the first synchronization element 471s and the second synchronization element 472s. Taking the pivoting of the first armrest tube 430as as an example, the function of the synchronization component is explained: when the armrest tube 430as is unlocked and the first armrest tube 430as pivots relative to the fixed base 420s, the armrest tube 430as drives the first synchronization element 471s, which is pivotally connected to it, to rotate and slide downwards, thereby driving the third fastener 403s to slide downwards, which in turn drives the second synchronization element 472s to slide downwards and rotate, further driving the second armrest tube 430bs to rotate relative to the fixed base 420s, thereby achieving synchronous folding of the first armrest tube 430as and the second armrest tube 430bs.

[0382] The eleventh embodiment of this disclosure is described below. Parts identical to those in the ninth embodiment will be omitted to avoid repetition.

[0383] See Figure 50The first fixing member 423s may have a spacer portion 426s, a rotation guide surface 427s, a rotation stop surface 428s, and an engaging portion 429s. The first fixing member 423s may have a symmetrical shape. The spacer portion 426s is located in the middle of the first fixing member 423s and extends vertically upward. Two rotation guide surfaces 427s, two rotation stop surfaces 428s, and two engaging portions 429s are respectively located on both sides of the spacer portion 426s. The two engaging portions 429s are adjacent to the spacer portion 426s and form an angle with it. The two rotation stop surfaces 428s are located at both ends of the first fixing member 423s, and their extending direction is approximately parallel to the spacer portion 426s, that is, approximately vertically upward. Each of the two rotation guide surfaces 427s may be located between an engaging portion 429s and a rotation stop surface 428s. The engaging portion 429s may be formed as a generally horizontal surface, the rotation stop surface 428s may be formed as a generally vertical surface, and the rotation guide surface 427s may be formed as a curved surface, but this application is not limited thereto. A positioning protrusion 4271s may be formed on each rotation guide surface 427s. The positioning protrusion 4271s may be integrally formed with the rotation guide surface 427s, or the positioning protrusion 4271s may be formed separately and connected to the rotation guide surface 427s. The positioning protrusion 4271s may protrude from the rotation guide surface 427s, such that the rotation guide surface 427s does not form a smooth curved surface at the positioning protrusion 4271s. The first fastener 423s may be made of plastic, but this application is not limited thereto.

[0384] Similar to the previous embodiment, the fixing member 422s in this embodiment may include a first fixing member 423s and a second fixing member 424s. The first fixing member 423s and the second fixing member 424s may be formed to be substantially mirror-symmetrical to each other. That is, the second fixing member 424s may also have the aforementioned spacer portion 426s, rotation guide surface 427s, rotation stop surface 428s, engaging portion 429s, and positioning protrusion 4271s.

[0385] The following description will only take the first fastener 423s as an example. The specific structure of the second fastener 424s can be referred to the description of the first fastener 423s and the description of the foregoing embodiments.

[0386] See Figures 51 to 53 The collapsible crib can be in an unfolded state (e.g., 400 seconds). Figure 51 and Figure 52 (as shown) and closed state (as shown) Figure 53(As shown). The armrest tube 430s may include a first armrest tube 430as and a second armrest tube 430bs. When the collapsible crib 400s is in the unfolded state, the ends of the first armrest tube 430as and the second armrest tube 430bs, as well as the portions of the two engaging members 432s extending from the first armrest tube 430as and the second armrest tube 430bs, engage with the engaging portion 429s, thereby keeping the crib 400s in the unfolded state (see...). Figure 52 and Figure 54 When the armrest tube 430s is in the folded state, the portions of the two engaging pieces 432s extending out of the first armrest tube 430as and the second armrest tube 430bs are respectively limited by the two positioning protrusions 4271s, thereby keeping the crib 400s in the folded state (see...). Figure 53 and Figure 55 In this way, the two positioning protrusions 4271s can respectively prevent the first armrest tube 430as and the second armrest tube 430bs from being undesirably pivoted, causing the crib 400s to change from a folded state to an unfolded state. Due to the positioning protrusions 4271s, the crib 400s can remain in the folded position, and can stand up on its own in the folded position, making it convenient to use.

[0387] See Figures 52 to 55 When the crib 400s is transitioned from the unfolded state to the folded state, the first armrest tube 430as and the second armrest tube 430bs move away from the spacer 426s respectively (the linkage between the first armrest tube 430as and the second armrest tube 430bs can be found in the aforementioned embodiment), causing the ends of the two engaging members 432s on the first armrest tube 430as and the second armrest tube 430bs to disengage from the two engaging portions 429s respectively. At the same time, the two first fasteners 401s on the first armrest tube 430as and the second armrest tube 430bs move relative to each other from the outer ends of the two elongated holes 431s to the inner ends of the two elongated holes 431s, thereby preventing the first armrest tube 430as and the second armrest tube 430bs from moving further outward.

[0388] Then, the mounting bracket 420s (for reference) Figure 39A ) moves downwards, while the first handrail tube 430as and the second handrail tube 430bs pivot relative to the corresponding first fastener 401s (e.g. Figures 52 to 55As shown, the second handrail tube 430bs pivots clockwise, and the first handrail tube 430as pivots counterclockwise. One end of each of the two engaging members 432s on the first handrail tube 430as and the second handrail tube 430bs moves synchronously along two rotation guide surfaces 427s on both sides of the fixing member 422s. Optionally, the end of each engaging member 432s that contacts the corresponding rotation guide surface 427s may have a profile matching that rotation guide surface 427s, but this application is not limited thereto. When the two engaging members 432s move to the positions of the two positioning protrusions 4271s respectively, the pivoting of the first handrail tube 430as and the second handrail tube 430bs is blocked by the two positioning protrusions 4271s. At this time, it is necessary to increase the force required to pivot the first handrail tube 430as and the second handrail tube 430bs to overcome the resistance exerted by the two positioning protrusions 4271s. Then, the first armrest tube 430as and the second armrest tube 430bs pivot further and pass through two positioning protrusions 4271s respectively. Finally, the first armrest tube 430as and the second armrest tube 430bs abut against two rotation stop surfaces 428s respectively, thus preventing further pivoting. In this way, the folding process of the foldable crib 400s is completed. At this time, all the uprights 410s are as close to each other as possible and remain basically vertical, and the first armrest tube 430as and the second armrest tube 430bs are in a vertically close state. The two positioning protrusions 4271s are adjacent to the two engaging pieces 432s on the first armrest tube 430as and the second armrest tube 430bs respectively to prevent the first armrest tube 430as and the second armrest tube 430bs from generating undesirable pivoting, thereby keeping the crib 400s in the folded state.

[0389] As described above, when the collapsible crib 400s is in the folded state, the positioning protrusions 4271s apply resistance to the pivoting of the first armrest tube 430as and the second armrest tube 430bs, thereby preventing the crib 400s from changing from the folded state to the unfolded state. When it is necessary to change the crib 400s from the folded state to the unfolded state, a thrust needs to be applied to the first armrest tube 430as and the second armrest tube 430bs to overcome the resistance of the two positioning protrusions 4271s. Then, the first armrest tube 430as and the second armrest tube 430bs pivot further and pass through the two positioning protrusions 4271s respectively. Finally, the two engaging pieces 432s on the first armrest tube 430as and the second armrest tube 430bs engage with the two engaging portions 429s respectively, and the first armrest tube 430as and the second armrest tube 430bs cannot continue to pivot. Thus, the unfolding process of the foldable crib 400s is completed. At this time, all the uprights 410s are as far apart as possible from each other and remain basically vertical, while the first armrest tube 430as and the second armrest tube 430bs are in a horizontal unfolded state.

[0390] In other variant embodiments, the first fixing member 423s and the second fixing member 424s can be integrally formed with the fixing base housing 421s, that is, the first fixing member 423s and the second fixing member 424s are formed as part of the fixing base 420s, which can also achieve the effect of keeping the crib 400s in the folded state.

[0391] Although this embodiment only describes keeping the crib 400s in a folded state by means of the positioning protrusion 4271s, in other embodiments, other structures can be provided to prevent the armrest tube 430s from changing from a folded state to an unfolded state, thereby achieving a similar function to the positioning protrusion 4271s.

[0392] Other descriptions of the baby crib 400s changing from the unfolded state to the folded state or from the folded state to the unfolded state in this embodiment can be found in the foregoing embodiments, and will not be repeated here. It should be noted that, during the process of the baby crib 400s changing from the folded state to the unfolded state, one difference between this embodiment and the foregoing embodiments is that the first armrest tube 430as and the second armrest tube 430bs first need to overcome the resistance exerted by the positioning protrusion 4271s on the pivoting of the first armrest tube 430as and the second armrest tube 430bs.

[0393] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device in the diagram is flipped so that it is upside down, the component described as "upper" will become the component described as "lower." Other relative terms such as "top," "bottom," "left," and "right" also have similar meanings. When a structure is "on" another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0394] In this specification, the terms “a,” “an,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “comprising,” “including,” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markings and are not intended to limit the number of objects.

[0395] Unless otherwise specified, all terms used herein, including technical and scientific terms, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. It should also be understood that terms shall be interpreted as having the meaning consistent with their meaning in the relevant field context, and shall not be construed as having an idealized or overly formal meaning unless expressly defined herein.

[0396] It should be understood that although preferred embodiments have been shown and described above, this disclosure is not limited to the specific embodiments described above, and various modifications and variations can be made by those skilled in the art without departing from the spirit and scope of the appended claims. Therefore, it should be noted that various modifications and variations should not be considered to exceed the technical spirit and scope of this disclosure.

Claims

1. A collapsible crib, comprising: Column mechanism; The mounting base includes a first connecting groove; The handrail tube has one end pivotally connected to the column mechanism at the third pivot point, and the other end of the handrail tube is movably connected to the fixed base at the fourth pivot point. as well as A linkage mechanism is configured to assist in the folding and unfolding of the collapsible crib. One end of the linkage mechanism is pivotally connected to the column mechanism, and the other end of the linkage mechanism is pivotally connected to the fixed base. The linkage mechanism includes a linkage rod extending parallel to the armrest tube and a linkage member extending non-parallel to the linkage rod. The linkage mechanism or the armrest tube is provided with a connecting member. The connecting member can slide relative to the first connecting groove and has a locked position and an unlocked position. When the connecting member is in the locked position, the armrest tube is locked relative to the fixed seat and the column mechanism. When the connecting member is in the unlocked position, the armrest tube can pivot relative to the fixed seat and the column mechanism to fold up the foldable crib.

2. The collapsible baby crib according to claim 1, characterized in that, The first connecting groove is configured as a first sliding groove in which the connecting member can slide. The first sliding groove includes a first groove segment parallel to the length direction of the handrail tube and a second groove segment set at an angle to the first groove segment. The two opposite ends of the first groove segment constitute the locking position and the unlocking position of the connecting member. The second groove segment is connected to the first groove segment at the end of the first groove segment corresponding to the unlocking position.

3. The collapsible baby crib according to claim 1, characterized in that, The linkage is configured to slide relative to the handrail tube, and The linkage includes: A first linkage, one end of which is pivotally connected to the column mechanism at a fifth pivot point, and the other end of which is pivotally connected to the first end of the linkage rod at the first pivot point; and The second linkage has one end pivotally connected to the fixed seat at the sixth pivot point, and the other end pivotally connected to the second end of the linkage rod at the second pivot point.

4. The collapsible baby crib according to claim 3, characterized in that, The linkage rod is slidably disposed inside the handrail tube. A slot is provided at the position corresponding to the first end and the second end of the linkage rod in the handrail tube so that the first linkage member and the second linkage member can extend out from the handrail tube.

5. A collapsible crib, comprising: Column mechanism; Handrail tube, one end of which is pivotally connected to the column mechanism; A fixed base, wherein the other end of the handrail tube is pivotally and slidably connected to the fixed base; as well as A linkage mechanism assists in the folding and unfolding of the collapsible crib. The linkage mechanism includes a linkage rod extending parallel to the armrest tube and a linkage member extending non-parallel to the linkage rod. The linkage mechanism is pivotally connected to the column mechanism and the fixed base via corresponding linkage members. The linkage rod is pivotally connected to the corresponding linkage member via a first pivot point and a second pivot point. The collapsible crib has an unfolded state and a folded state. During the process of switching between the unfolded state and the folded state, the positions of the first pivot point and the second pivot point relative to the armrest tube change continuously in a direction parallel to the armrest tube.

6. The collapsible baby crib according to claim 5, characterized in that, The first pivot point and the second pivot point are located further away from the connection between the armrest tube and the column mechanism when the collapsible crib is in the collapsible state than when the collapsible crib is in the unfolded state.

7. The collapsible baby crib according to claim 5, characterized in that, The handrail tube is pivotally connected to the column mechanism via a third pivot point, and to the fixed base via a fourth pivot point. The corresponding linkage connected to the first pivot point is pivotally connected to the column mechanism via a fifth pivot point, and the corresponding linkage connected to the second pivot point is pivotally connected to the fixed base via a sixth pivot point. The lines connecting the first pivot point, the third pivot point, and the fifth pivot point form a first triangle; the lines connecting the second pivot point, the fourth pivot point, and the sixth pivot point form a second triangle; and During the process of switching between the unfolded state and the folded state of the collapsible crib, the angles of each corner of the first triangle and the second triangle continuously change.

8. A collapsible crib, comprising: Fixed base; The first and second handrail tubes are pivotally connected to the fixed base; as well as A synchronization component, comprising a first synchronization element and a second synchronization element, wherein a first end of the first synchronization element is movably connected to the fixed base, a second end of the first synchronization element is movably connected to the first handrail tube, a first end of the second synchronization element is movably connected to the fixed base, and a second end of the second synchronization element is movably connected to the second handrail tube. The collapsible crib has an unfolded state and a folded state. During the transition of the collapsible crib from the unfolded state to the folded state, the pivoting motion of one of the first armrest tubes and the second armrest tubes relative to the fixed seat causes the first and second synchronizing members to move relative to the fixed seat, thereby causing the other of the first armrest tubes and the second armrest tubes to pivot relative to the fixed seat, so as to achieve synchronous folding of the first armrest tubes and the second armrest tubes.

9. The collapsible baby crib according to claim 8, characterized in that, The foldable crib also includes a support column mechanism. The fixed base is provided with a first sliding groove, and each of the first armrest tube and the second armrest tube is provided with a first connecting member; alternatively, the fixed base is provided with a first connecting member, and each of the first armrest tube and the second armrest tube is provided with a first sliding groove. The first connector is slidable in the first sliding groove and has a locked position and an unlocked position. When the first connector is in the locked position, the armrest tube is locked relative to the fixed base and the column mechanism. When the first connector is in the unlocked position, the armrest tube is pivotable relative to the fixed base and the column mechanism to fold up the foldable crib.

10. The collapsible baby crib according to claim 8, characterized in that, The first synchronizing element and the second synchronizing element are staggered. The first ends of the first synchronizing element and the second synchronizing element are slidably pivotally connected to the fixed base, and the second ends of the first synchronizing element and the second synchronizing element are pivotally connected to the first handrail tube and the second handrail tube, respectively.

Images