CN219877834U - Folding mechanism and baby crib frame and foldable baby crib - Google Patents

Abstract

The utility model belongs to the technical field of cribs. In view of the defects such as clamping stagnation and the like existing in the prior folding crib, the utility model discloses a folding mechanism, a crib frame and a folding crib, wherein the folding mechanism comprises a center seat; the rotating pieces are arranged around the center seat in a surrounding manner and pivoted with the center seat; the linkage piece is arranged below the center seat; one end of each rotating piece facing the linkage piece is in transmission connection with a corresponding part of the linkage piece; when the linkage piece moves up and down along the thickness direction of the center seat, the rotation piece is synchronously driven to swing up and down, so that the folding mechanism is changed between an unfolding state and a folding state. According to the folding baby crib frame and the folding baby crib, the synchronous rotation of the rotating pieces can be realized through the cooperation of the gear part and the rack part of the folding mechanism, so that the folding baby crib frame and the folding baby crib are convenient and rapid to unfold and fold.

Description

Folding mechanism and baby crib frame and foldable baby crib

Technical Field

The utility model belongs to the technical field of cribs, and particularly relates to a turnover mechanism, a crib frame and a foldable crib.

Background

Infant beds are commonly used in many households worldwide as an important aid in the care of infants. Among them, the foldable crib has been widely used in recent years due to its characteristics of convenient storage and carrying.

The folding bed frame portion of existing foldable cribs generally includes a base frame and guard rails. For the chassis, some technologies have been designed to fold and house the chassis as a folding mechanism including a center base and a bottom bar hinged around the center base.

However, when the folding structure is unfolded, the bottom rod is difficult to unfold due to uneven stress, abrasion and the like, so that the foldable crib has the defects of clamping stagnation and the like when being unfolded.

Disclosure of Invention

In view of the above problems of the prior foldable crib that the unfolding of the bottom rod is difficult, thereby affecting the unfolding operation of the foldable crib, one of the purposes of the present utility model is to provide a folding mechanism, a crib frame and a foldable crib, which are convenient to unfold and fold.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a turnover mechanism comprises a center seat; the rotating pieces are arranged around the center seat in a surrounding manner and pivoted with the center seat; and the linkage piece is arranged below the center seat.

One end of each rotating piece facing the linkage piece is in transmission connection with a corresponding part of the linkage piece; when the linkage piece moves up and down along the thickness direction of the center seat, the rotation piece is synchronously driven to swing up and down, so that the folding mechanism is changed between an unfolding state and a folding state.

In one of the technical schemes disclosed by the utility model, the linkage piece is provided with a rack part extending along the thickness direction of the center seat; correspondingly, one end of the rotating piece, which faces the linkage piece, is provided with a gear part meshed with the rack part.

In one of the technical schemes disclosed by the utility model, the utility model further comprises a locking and unlocking assembly; the lock-unlock assembly can be actuated to prevent or permit movement of the linkage.

In one of the technical schemes disclosed by the utility model, the bottom center of the center seat is provided with a hollow supporting shaft along the thickness direction of the center seat; the linkage piece is sleeved on the supporting shaft and can move up and down along the supporting shaft; the locking and unlocking assembly comprises an unlocking piece and a locking piece which are arranged inside the supporting shaft.

A part of the locking piece can protrude the supporting shaft to be abutted with the linkage piece so as to prevent the movement of the linkage piece; when the unlocking member is triggered, a portion of the locking member protruding the support shaft may be retracted into the support shaft, so that the movement-blocked state of the linkage member is released.

In one of the technical schemes disclosed by the utility model, the locking piece comprises a plurality of rotating pieces which are arranged in the support, one end of the locking piece is pivoted with the inner wall of the support shaft, and the other end of the locking piece is formed into a free end.

Wherein, the support shaft is provided with a through hole for the free end of the rotating plate to pass through; when the free end of the rotating piece passes through the through hole and protrudes out of the supporting shaft, the free end of the rotating piece can be abutted with the linkage piece so as to prevent the movement of the linkage piece.

In one of the technical schemes disclosed by the utility model, the unlocking piece is provided with a baffle plate and is arranged inside the supporting shaft; the baffle plate is provided with an extension part extending along the axial direction of the support shaft; the extension part is connected with the free end of the rotating piece through a pin shaft and a waist-shaped hole which are matched with each other; the waist-shaped hole is arranged near the free end of the rotating plate or on the extending part, and one end of the pin shaft is correspondingly arranged on the extending part or the rotating plate and is positioned in the waist-shaped hole; the length direction of the waist-shaped hole faces the through hole; one end of the lifting part is connected with the baffle plate, and the other end of the lifting part penetrates through the top of the center seat and extends out of the center seat; the first reset piece is arranged between the baffle plate and the center seat.

In one of the technical schemes disclosed by the utility model, a second reset piece is arranged between the center seat and the linkage piece.

In one of the technical schemes disclosed by the utility model, the pivot joint positions of the center seat and the rotating piece are provided with the limiting parts, so that the rotating piece can only pivot along the direction changing to the folding state.

A baby crib frame comprises a plurality of upright posts and a top surrounding frame connected with the upright posts; each edge of the top surrounding frame is respectively provided with two cross bars with one end pivoted with the upright posts, an armrest folding mechanism connected with the other ends of the two cross bars, a folding mechanism and a plurality of bottom bars, wherein the folding mechanism and the bottom bars are any one of the technical schemes; one end of the bottom rod is pivoted with the upright post, and the other end of the bottom rod is connected with the rotating piece of the turnover mechanism.

The armrest folding mechanism is actuatable to permit rotation of the cross bar when the folding mechanism is changed between the unfolded state and the folded state, such that the playard frame is changed between the use state and the folded state.

In one of the technical solutions disclosed in the utility model, the armrest folding mechanism comprises a joint member; the other end of the cross bar is pivoted with the joint piece.

In one of the technical schemes disclosed by the utility model, the following steps are: two sides of the joint piece are provided with accommodating cavities for accommodating the other ends of the cross bars; oblique guide grooves are symmetrically formed in two sides of the accommodating cavity; the inclined upper end of the inclined guide groove is provided with a clamping and locking groove which is communicated transversely; the other end of the cross rod is provided with a pivot matched with the inclined guide groove and the locking groove.

When the folding mechanism is changed between the unfolding state and the folding state, the rotating piece pulls the bottom rod to incline in the rotating process, and the bottom rod pulls the upright post to incline and move in position in the inclining process, so that the pivot at the other end of the cross rod moves from the locking groove to the inclined guide groove, and the crib frame is changed from the using state to the folding state.

In one of the technical schemes disclosed by the utility model, horizontal guide grooves are symmetrically arranged on two sides of the accommodating cavity; wherein, the other end of the cross bar is provided with a pivot matched with the horizontal guide groove.

In one of the technical schemes disclosed by the utility model, a first balance rod is arranged below the cross rod; one end of the first balance rod is pivoted with the upright post, and the other end of the first balance rod is pivoted with the joint piece.

In one of the technical schemes disclosed by the utility model, the joint piece is provided with an arc-shaped guide groove taking the pivoting position of the first balance rod and the joint piece as the center of a circle; the upper end of the arc-shaped guide groove is provided with a limit groove which is communicated transversely; the other end of the first balance rod is provided with a pivot matched with the arc-shaped guide groove and the limit groove.

In one of the technical schemes disclosed by the utility model, a second balance rod is arranged below the bottom rod, one end of the second balance rod is pivoted with the upright post, and the other end of the second balance rod is pivoted with the supporting shaft.

In one of the technical schemes disclosed by the utility model, the second balance rod is arranged in a plurality of sections and is connected with the bottom rod through a movable buckle.

In one of the technical schemes disclosed by the utility model, the lower end of the upright post is provided with a wheel leg.

In one of the technical schemes disclosed by the utility model, the utility model further comprises a plurality of auxiliary stay bars; one end of the auxiliary stay bar is hinged with the center seat, and the other end of the auxiliary stay bar is formed into a free end.

A foldable crib having a crib frame as in any one of the above claims.

As can be seen from the above description, compared with the prior art, the utility model has the following beneficial effects:

the utility model has simple structure and convenient operation, and can lead the rotating piece to synchronously rotate, be convenient to unfold and fold and avoid the bad phenomena of clamping stagnation and the like through the cooperation of the rack part and the gear part.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the related art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.

Fig. 1 is a schematic view of the folding mechanism of the present utility model in a unfolded state.

Fig. 2 is a schematic view of the folding mechanism according to the present utility model in a folded state.

Fig. 3 is a schematic longitudinal sectional view of the folding mechanism of the present utility model.

Fig. 4 is a schematic structural view of the folding mechanism with locking and unlocking members.

Fig. 5 is a schematic structural view of the infant bed frame of the present utility model in a use state.

Fig. 6 is another structural schematic view of the infant bed frame of the present utility model in a use state.

Fig. 7 is an enlarged partial schematic view of fig. 6.

Fig. 8 is a schematic structural view of the joint of the present utility model.

Fig. 9 is a schematic cross-sectional view of the joint of fig. 8.

Fig. 10 is another structural schematic view of the infant bed frame of the present utility model in a use state.

Fig. 11 is an enlarged partial schematic view of fig. 10.

Fig. 12 is another structural view of the infant bed frame of the present utility model in a use state.

Fig. 13 is a schematic view showing a structure of the infant bed frame shown in fig. 12 in a folded state.

Fig. 14 is a schematic view of the structure of the casters of the infant bed frame of the present utility model.

Reference numerals: 1-a center seat; 11-a support shaft; 12-a limiting part;

2-a rotating member; 21-a gear portion;

3-linkage; 31-a rack portion; 32-a second reset element;

4-locking member; 41-turning piece; 411-kidney shaped holes;

5-unlocking piece; 51-a baffle; 511-extensions; 52-a lifting part; 53-a first reset element;

6-stand columns; 61-supporting legs; 62-angle seat; 63-wheel feet;

7-top surrounding frame; 71-a cross bar; 72-joint; 721-inclined guide slots; 722-a card locking groove; 723-horizontal guide grooves; 724-side plates; 725-connecting ribs; 726-reinforcing ribs; 727-arcuate guide slots; 73-a first balance bar;

8-a bottom bar; 81-a second balance bar; 82-a movable buckle;

9-auxiliary stay bars.

Detailed Description

Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

Example 1

The embodiment of the utility model discloses a turnover mechanism which has a unfolding state shown in an attached drawing 1 and a turnover state shown in an attached drawing 2, and the structure of the turnover mechanism comprises a center seat 1, a rotating piece 2 and a linkage piece 3.

Specifically, the bottom center of the center seat 1 is provided with a support shaft 11 extending downward (thickness direction of the center seat 1). The rotating parts 2 are arranged around the center seat 1 in a surrounding manner and pivoted with the center seat 1, and one end of the rotating parts 2 pivoted with the center seat 1 is provided with a gear part 21. The linkage member 3 is sleeved on the support shaft 11 and can move up and down along the support shaft 11, and the linkage member 3 is provided with a rack part 31 extending along the axial direction of the support shaft 11, and the rack part 31 is meshed with the gear part 21.

When in actual use, compared with the base folding mechanism of the crib in the prior art, as each rotating piece can have uneven stress when being unfolded, the rotating pieces can rotate respectively, so that the unfolding of the crib is influenced, the embodiment can enable a plurality of rotating pieces 2 to rotate simultaneously through the linkage action of the rack part 31 and the gear part 21, so that the unfolding action can be completed quickly and simply, and the adverse phenomena such as clamping stagnation and the like are avoided.

It will be appreciated that, in view of the linkage action of the gear portion 21 and the rack portion 31, it will be apparent to those skilled in the art that other linkage structures, such as a link transmission structure, a ball screw transmission structure, etc., are suitable for the movement of the linkage member 3, and the plurality of rotation pieces 2 may be triggered to rotate simultaneously.

In this embodiment, there are 4 rotating members 2. It will be appreciated that the number of turning members 2 may be 2, 3, 5, etc.

More specifically, in some embodiments, as shown in fig. 3, a second reset element 32 is also included and disposed between the hub 1 and the linkage 3; the second restoring member 32 is provided to provide a force of downward movement to the link member 3, thereby preventing the rotation member 2 from rotating under its own weight, so that the rotation member 2 is maintained in a unfolded state.

In this embodiment, the second restoring member 32 is a spring and is sleeved on the supporting shaft 11. It should be understood that the second restoring member 32 may be another elastic member, which is not limited to this embodiment.

In some embodiments, to avoid the rotation of the rotating member 2 to the unfolded state and further to the upward rotation to the undesired state, the pivotal connection position of the center seat 1 and the rotating member 2 is provided with a limiting portion 12, and the limiting portion 12 only allows the rotating member 2 to rotate downward to the folded state as shown in fig. 2, but does not allow the rotating member 2 to rotate upward.

Example 2

As an optimization of embodiment 1, the folding mechanism further comprises a locking and unlocking assembly to prevent or allow movement of the linkage 3.

Specifically, as shown in fig. 4, the inside of the support shaft 11 is hollow. The locking and unlocking assembly comprises a locking piece 4 and an unlocking piece 5 which are arranged in a cavity in the supporting shaft 11.

The locking piece 4 is provided with a locking position and an unlocking position, when the locking piece 4 is in the locking position, part of the locking piece 4 can protrude out of the outer side of the supporting shaft 11 to be abutted with the linkage piece 3 so as to prevent the movement of the linkage piece 3; when the locking piece 4 is in the unlocking position, the part of the locking piece 4 can retract into the supporting shaft 11, so that the movement blocking state of the linkage piece 3 is released; the unlocking member 5 can actuate the locking member 4 to switch between the locking position and the unlocking position.

When folding is needed, the locking piece 4 is switched to the unlocking position, and the linkage piece 3 moves upwards, so that the plurality of rotating pieces 2 are driven to change from the unfolding state to the folding state simultaneously through the cooperation of the rack part 31 and the gear part 21; the structure is simple to operate, and is favorable for improving the fluency of unfolding.

More specifically, the locking member 4 includes a plurality of rotating pieces 41 rotatably provided in the cavity of the support shaft 11, one end of the rotating piece 41 being pivotally connected to the inner wall of the support shaft 11, and the other end being formed as a free end; wherein the support shaft 11 is provided with a through hole through which the free end of the rotation piece 41 passes. When the free end of the rotary piece 41 protrudes outside the support shaft 11 through the through hole, it can abut against the link 3 to prevent the movement of the link 3.

In the present embodiment, 2 rotor plates 41 are symmetrically disposed in the cavity of the support shaft 11; it should be understood that the number of the rotating pieces 41 may be 1, 3, 4, etc., and the present embodiment is not limited thereto.

The unlocking member 5 includes a blocking piece 51, a pulling portion 52, and a first restoring member 53.

The baffle plate 51 is disposed in the cavity of the support shaft 11 and has extension portions 511 extending downward and formed at both sides of the rotation plate 41; the extension 511 and the free end of the rotation piece 41 are connected by a waist-shaped hole 411 and a pin shaft which are matched with each other, and the length direction of the waist-shaped hole 411 faces to the through hole of the support shaft 11; it will be appreciated that the waist-shaped aperture 411 may be formed in the extension 511 or near the free end of the rotary plate 41, and that one end of the pin is secured to the rotary plate 41 or the extension 511, respectively. One end of the pulling part 52 is connected with the baffle plate 51, and the other end passes through the top of the center seat 1 and extends out of the center seat. The first restoring member 53 is provided between the shutter 51 and the center seat 1 to drive the shutter 51 to move for restoring, thereby rotating the rotating piece 41 to the locking position.

When the folding is required, the lifting part 52 is lifted upwards and drives the baffle plate 52 to move upwards, so that the rotating plate 41 rotates and is completely folded into the accommodating cavity under the linkage action of the waist-shaped hole 411 and the pin shaft, and at the moment, the linkage piece 3 can move along the supporting shaft 11, so that the rotating piece 3 is driven to be converted into a folding state from an unfolding state.

In the present embodiment, the first restoring member 53 is a spring, and it is understood that the first restoring member 52 may be another elastic member, which is not limited to this embodiment.

The lifting portion 52 may be a flexible belt or other structures such as a handle, and only needs to drive the baffle plate 51 to move upwards, which is not limited to this embodiment.

Example 3

The embodiment discloses a baby crib frame, the structure of which is shown in fig. 5, and the baby crib frame comprises upright posts 6, a top surrounding frame 7, a bottom rod 8, a turnover mechanism and other parts. The crib frame has a use condition as shown in fig. 12 and a collapsed condition as shown in fig. 13, and has a much smaller volume than the use condition when the crib is in the collapsed condition, to facilitate transportation or storage of the crib.

Specifically, the four posts 6 are rectangular in distribution. Each side of the top enclosure 7 has two cross bars 71 and an armrest folding mechanism disposed between the two cross bars 71, and one end of the cross bar 71 is pivotally connected to the upright 6, and the other end is pivotally connected to the armrest folding mechanism to form a rectangular enclosure on the upper portion of the upright 6. One end of the bottom rod 8 is hinged with the upright post 6, and the other end is connected with the rotating piece 2 of the turnover mechanism, so that the turnover mechanism is connected to the baby crib frame.

Upon folding, the armrest folding mechanism can be actuated to allow the cross bar 71 to rotate, transitioning the crib frame between the use and folded conditions; thereby, the central seat 1 is pulled to incline by pulling the pulling part 52, the bottom rod 8 is pulled to incline in the process of upward movement, and the upright post 6 is pulled to incline and move in position by the bottom rod 8 in the process of inclination, so that the cross rod 71 is rotated, and the infant bed frame is changed from the use state to the folding state.

More specifically, to improve the stability of the turnover mechanism, the folding mechanism further comprises 2 auxiliary stay bars 9, one end of each of the 2 auxiliary stay bars 9 is hinged with the center seat 1, and the other end of each of the 2 auxiliary stay bars forms a free end and is contacted with the ground to support the turnover mechanism.

It is understood that the number of the auxiliary stay bars 9 may be 3, 4, 5, etc., and the embodiment is not limited thereto.

Example 4

As one embodiment of example 3, as shown in fig. 6 and 7, the armrest folding mechanism includes an engagement member 72; wherein the other end of the cross bar 71 is pivotally connected to the engagement member 72.

Specifically, the engaging member 72 is provided with receiving cavities on both sides for receiving the other ends of the cross bars 71, inclined guide grooves 721 inclined upward away from the other ends of the cross bars 71 are symmetrically provided on both sides of the receiving cavities, and the inclined upper ends of the inclined guide grooves 721 are provided with laterally conducted latching grooves 722. Accordingly, the other end of the cross bar 71 is provided with a pivot shaft which cooperates with the inclined guide slot 721 and the locking slot 722 so that the cross bar 71 can pivot only in the direction of the folded state; thus, when folding, the central seat 1 pulls the bottom rod 8 to incline in the process of moving upwards, and pulls the upright post 6 to incline and move in position in the process of inclining, so that the cross rod 71 moves from the locking groove 722 to the inclined guide groove 721, and the cross rod 71 rotates, thereby realizing folding and folding of the crib.

With the above structure, the connection strength between the armrest folding mechanism and the cross bar 71 can be improved by the cooperation of the inclined guide slot 721, the locking slot 722 and the pivot, so as to avoid the phenomenon that the cross bar 72 rotates to cause deformation of the crib and can not be used when the crib is in a unfolded state.

When the baby crib is needed to be used, the central seat 1 is pressed down, and the second reset piece 42 drives the linkage piece 3 to move downwards; the rotating piece 41 passes through the outer side of the supporting shaft 11 again under the action of the first reset piece 53 and is abutted with the linkage piece 3; and the rotating member 2 is rotated under the linkage action of the rack part 31 and the gear part 21, so as to drive the bottom rod 8 to perform corresponding unfolding action based on the center seat 1, and the upright post 6 is pulled to move in the unfolding process of the bottom rod 8, so that the pivot at the other end of the cross rod 72 moves from the inclined guide groove 721 to the locking groove 722 to lock, thereby ensuring the normal use of the crib.

When the crib needs to be folded, the lifting part 52 is lifted upwards, the baffle plate 51 is linked with the rotating plate 41 to rotate, and the rotating plate 41 is completely contained in the cavity of the supporting shaft 11; and continues to lift the lifting part 52 upwards, and in the process that the center seat 1 moves upwards, the traction rotating piece 2 rotates and drives the bottom rod 8 to incline; the bottom rod 8 pulls the upright post 6 to incline and move in the process of inclining, so that the pivot of the other end of the cross rod 72 moves from the locking groove 722 to the inclined guide groove 721 to rotate, thereby changing the crib from the use state to the folding state, and completing the disposable folding and folding of the crib.

In some embodiments, horizontal guide grooves 723 are also symmetrically provided on both sides of the receiving chamber. Accordingly, the other end of the cross bar 72 is provided with a pivot shaft penetrating in the horizontal guide groove 723.

As a specific implementation of the above embodiment, the engaging member 72 includes two side plates 724 disposed in parallel and a connecting rib 725 connected between the two side plates 724, which together form the accommodating chamber.

More specifically, to enhance the strength of the joint 72, as shown in fig. 8 and 9, reinforcing ribs 726 are provided on the inner side of the side plate of the joint 72, with gaps formed between the reinforcing ribs 726; wherein the inclined guide groove 721 and the locking groove 722 are disposed on the opposite side of the reinforcing rib 726. In this embodiment, the reinforcement rib 726 is attached to the side plate 724 by a plurality of rivets.

It will be appreciated that for ease of assembly, the angled guide slot 721, the detent slot 722 and the horizontal guide slot 723 may all extend through the engagement member 72.

In some embodiments, the armrest retraction mechanism may further include a trigger lock assembly (not shown) that can be actuated to prevent or permit rotation of the cross bar 71, as is common in the art, without any difficulty to those skilled in the art and will not be described in detail herein.

Example 5

As a specific embodiment of example 3, to improve the strength and stability of the top enclosure 7, a first balance bar 73 is provided under the cross bar 71 as shown in fig. 10 and 11.

More specifically, the armrest stowing mechanism includes an engagement member 72. The other end of the cross bar 72 is pivotally connected to the engagement member 72. One end of the first balance bar 73 is hinged with the upright post 6, and the other end is provided with a pin joint with the joint piece 7. Wherein, the joint member 72 is provided with an arc-shaped guide groove 727 by taking the pivoting position of the first balance bar 73 and the joint member 7 as the center of a circle, and the upper end of the arc-shaped guide groove 727 is transversely communicated with a limit groove. The other end of the first balance bar 73 is provided with a pivot shaft which is matched with the arc-shaped guide groove 727 and the limit groove.

When the crib is folded, the upright post 6 moves from the limiting groove to the arc-shaped guide groove 727 to rotate in the process of tilting and moving the upright post 6, and drives the cross rod 71 to rotate, so that the crib is changed from a use state to a folding state, and the disposable folding and folding of the crib are completed.

In some embodiments, as shown in fig. 12, a second balance bar 81 is provided below the bottom bar 8, and one end of the second balance bar 81 is hinged to the upright 6, and the other end is hinged to the support shaft 11, so that the stability of the infant bed frame can be improved.

More specifically, the second balance bar 81 is provided in a multi-stage structure and is connected to the bottom bar 8 through the movable buckle 82, so that flexibility of the second balance bar 81 can be improved, which is advantageous in improving folding efficiency.

Example 6

As a specific implementation of the above embodiment, in this embodiment, as shown in fig. 5 and 14, the lower portion of the upright 6 may be formed with a leg 61, and one end of the bottom bar 8 is hinged to the leg 6 to be connected to the upright 6. The legs 61 are either integrally formed with the post 6 or are attached to the post 6 by rivets. It will be appreciated that the legs 61 may also be connected to the uprights 6 by other means, the embodiment being not limited thereto.

Considering that the legs 61 are not movable, which results in inconvenient movement when the crib needs to be moved, the lower portion of the upright 6 may be formed with casters 63, or two of the four uprights 6 are formed with casters 63 and the other two uprights form the legs 61, so as to facilitate movement of the crib.

It will be appreciated that the casters 63 are also provided with a braking mechanism, so that when movement is not required, the casters can be fixed by the braking mechanism to improve the safety of the crib. The braking mechanism may be of the prior art, which will not be described in detail herein, without any difficulty to those skilled in the art.

More specifically, the top of the upright 6 is provided with a corner seat 62, and the cross bar 71 is hinged to the corner seat 62 at one end and to the joint 72 at the other end.

The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the utility model, and is not meant to limit the scope of the utility model, but to limit the utility model to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the utility model are intended to be included within the scope of the utility model.

Claims (19)

1. A turnover mechanism, comprising:

a center seat;

the rotating pieces are arranged around the center seat in a surrounding manner and pivoted with the center seat;

the linkage piece is arranged below the center seat;

one end of each rotating piece facing the linkage piece is in transmission connection with a corresponding part of the linkage piece;

when the linkage piece moves up and down along the thickness direction of the center seat, the rotation piece is synchronously driven to swing up and down, so that the folding mechanism is changed between an unfolding state and a folding state.

2. The folding mechanism according to claim 1, wherein the linkage is provided with a rack portion extending in a thickness direction of the center seat;

correspondingly, one end of the rotating piece, which faces the linkage piece, is provided with a gear part meshed with the rack part.

3. The folding mechanism of claim 1 or 2, further comprising a lock-unlock assembly; the lock-unlock assembly can be actuated to prevent or permit movement of the linkage.

4. A turnover mechanism as set forth in claim 3, wherein the bottom center of said center seat is provided with a hollow supporting shaft in the thickness direction thereof;

the linkage piece is sleeved on the supporting shaft and can move up and down along the supporting shaft;

the locking and unlocking assembly comprises an unlocking piece and a locking piece which are arranged inside the supporting shaft;

a part of the locking piece can protrude the supporting shaft to be abutted with the linkage piece so as to prevent the movement of the linkage piece;

when the unlocking member is triggered, a portion of the locking member protruding the support shaft may be retracted into the support shaft, so that the movement-blocked state of the linkage member is released.

5. The folding mechanism of claim 4, wherein the locking member comprises:

at least one rotating piece arranged inside the support; one end of the rotating piece is pivoted with the inner wall of the supporting shaft, and the other end of the rotating piece is formed into a free end;

wherein, the support shaft is provided with a through hole for the free end of the rotating plate to pass through;

when the free end of the rotating piece passes through the through hole and protrudes out of the supporting shaft, the free end of the rotating piece can be abutted with the linkage piece so as to prevent the movement of the linkage piece.

6. The folding mechanism of claim 5, wherein the unlocking member has:

the baffle is arranged inside the supporting shaft; the baffle plate is provided with an extension part extending along the axial direction of the support shaft; the extension part is connected with the free end of the rotating piece through a pin shaft and a waist-shaped hole which are matched with each other; the waist-shaped hole is arranged near the free end of the rotating plate or on the extending part, and one end of the pin shaft is correspondingly arranged on the extending part or the rotating plate and is positioned in the waist-shaped hole; the length direction of the waist-shaped hole faces the through hole;

one end of the lifting part is connected with the baffle plate, and the other end of the lifting part penetrates through the top of the center seat and extends out of the center seat;

the first reset piece is arranged between the baffle plate and the center seat.

7. A turnover mechanism as claimed in claim 1 or 6, wherein a second return member is provided between the central seat and the linkage member.

8. The folding mechanism according to claim 1, wherein the pivotal position of the center base and the rotating member is provided with a stopper portion so that the rotating member can pivot only in a direction changing to the folded state.

9. A baby crib frame comprises a plurality of upright posts and a top surrounding frame connected with the upright posts; wherein, every limit of top surrounding frame has one end respectively with two horizontal poles of stand pin joint and connect two the handrail closing mechanism of horizontal pole other end, its characterized in that still includes:

the folding mechanism according to any one of claims 1 to 8

A plurality of bottom bars;

one end of the bottom rod is pivoted with the upright post, and the other end of the bottom rod is connected with a rotating piece of the turnover mechanism;

the armrest folding mechanism is actuatable to permit rotation of the cross bar when the folding mechanism is changed between the unfolded state and the folded state, such that the playard frame is changed between the use state and the folded state.

10. The playbase of claim 9, wherein the armrest folding mechanism includes an engagement member; the other end of the cross bar is pivoted with the joint piece.

11. The infant bed frame of claim 10, wherein:

two sides of the joint piece are provided with accommodating cavities for accommodating the other ends of the cross bars;

oblique guide grooves are symmetrically formed in two sides of the accommodating cavity; the inclined upper end of the inclined guide groove is provided with a clamping and locking groove which is communicated transversely;

the other end of the cross rod is provided with a pivot matched with the inclined guide groove and the locking groove;

when the folding mechanism is changed between the unfolding state and the folding state, the rotating piece pulls the bottom rod to incline in the rotating process, and the bottom rod pulls the upright post to incline and move in position in the inclining process, so that the pivot at the other end of the cross rod moves from the locking groove to the inclined guide groove, and the crib frame is changed from the using state to the folding state.

12. The playbase of claim 11 wherein the sides of the receiving cavity are further symmetrically provided with horizontal guide slots; wherein, the other end of the cross bar is provided with a pivot matched with the horizontal guide groove.

13. The playbase of claim 10, wherein a first balance bar is positioned below the cross bar; one end of the first balance rod is pivoted with the upright post, and the other end of the first balance rod is pivoted with the joint piece.

14. The infant bed frame according to claim 13, wherein the coupling member is provided with an arc-shaped guide groove centering around a pivotal position of the first balance bar and the coupling member; the upper end of the arc-shaped guide groove is provided with a limit groove which is communicated transversely;

the other end of the first balance rod is provided with a pivot matched with the arc-shaped guide groove and the limit groove.

15. The playbase of claim 9, wherein a second balance bar is positioned below the base bar, the second balance bar being pivotally connected to the upright at one end and to the folding mechanism at the other end.

16. The playbase of claim 15 wherein the second balance bar is configured in multiple sections and is connected to the base bar by a movable clasp.

17. The playbase of claim 9, wherein the lower ends of the posts are formed with casters.

18. The playbase of claim 9 further comprising a plurality of secondary braces; one end of the auxiliary stay bar is hinged with the center seat, and the other end of the auxiliary stay bar is formed into a free end.

19. A collapsible crib having a crib frame as claimed in any one of claims 9 to 18.