CN221251266U - A pole setting coupling assembling and collapsible shallow for collapsible shallow - Google Patents

Abstract

The utility model discloses a vertical rod connecting assembly for a foldable trolley and the foldable trolley. The pole connecting assembly has an extended state and a closed state and is suitable for being hinged between adjacent poles of the foldable cart, the pole connecting assembly comprises at least one pole connecting member, the pole connecting member comprises a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are respectively provided with an approaching end and a far end, the approaching ends of the first connecting rod and the second connecting rod are hinged, and the far ends of the first connecting rod and the second connecting rod are respectively suitable for being hinged with the adjacent poles of the foldable cart and rotate around the respective approaching ends to be far away from or close to each other, so that the pole connecting assembly is extended to the extended state or folded to the closed state. The foldable trolley comprising the vertical rod connecting component is small in occupied space after being folded and convenient to store and carry.

Description

A pole setting coupling assembling and collapsible shallow for collapsible shallow

Technical Field

The utility model belongs to the technical field of carts, and particularly relates to a vertical rod connecting assembly for a foldable cart and the foldable cart.

Background

The cart is a common carrying tool in daily life and work, brings great convenience to people, but the conventional cart has the problem of large occupied space, and is not easy to store and carry. In this regard, various foldable carts are designed in the prior art, but most carts have too many rod members and are not smooth to fold, or have simple folding structures, and still occupy a large space after being folded, so that the cart is inconvenient to carry.

Disclosure of utility model

The utility model aims to provide a vertical rod connecting assembly for a foldable trolley and the foldable trolley comprising the vertical rod connecting assembly. The upright rod connecting component is foldable, simple in structure and small in number of connecting rods; the foldable trolley has the characteristics of convenience in folding, small occupied space after folding and convenience in storage.

To this end, according to one aspect of the inventive concept, a pole connection assembly for a collapsible pushchair is proposed, the pole connection assembly having an extended state and a closed state and being adapted to be hingedly connected between adjacent poles of the collapsible pushchair, the pole connection assembly comprising at least one pole connection member comprising a first and a second connecting rod, each having an approaching end and a distal end, the approaching ends of the first and second connecting rods being hinged, the distal ends of the first and second connecting rods being adapted to be hinged with adjacent poles of the collapsible pushchair and being rotatable away from or towards each other about the respective approaching ends, such that the pole connection assembly is in the extended state or the closed state.

The present utility model may further include any one or more of the following alternative forms according to the technical idea described above.

According to some alternative embodiments, the pole connecting assembly comprises at least two pole connecting members arranged at intervals, in at least two of which the first connecting bars are parallel to each other and the second connecting bars are parallel to each other.

According to some alternative embodiments, in at least two of the upright connecting members, the lengths of the first connecting rods parallel to each other are the same or different, and the lengths of the second connecting rods parallel to each other are the same or different.

According to some alternative embodiments, the first connecting rod and the second connecting rod are equal in length.

According to some alternative embodiments, in the extended state, the first and second connection bars of the upright connection member are on the same line.

According to some alternative embodiments, the pole connection assembly has a first blocking portion adapted to unidirectionally prevent rotation of the first and second connection bars when the pole connection assembly is in the extended state.

According to some alternative embodiments, the pole coupling assembly further comprises a channel shell coupling having a slot opening forming a channel bottom wall and a channel side wall, the channel bottom wall being configured as the first stop, the proximal ends of the first and second coupling rods being inserted into the channel shell coupling from the slot opening and hinged to the channel side wall, respectively.

According to another aspect of the inventive concept, a collapsible cart is presented comprising a frame having an expanded state and a collapsed state, and comprising: a plurality of uprights arranged circumferentially along the frame; one or more connection assemblies hingedly disposed between adjacent ones of the uprights and adapted to be extended or closed such that the frame is in the extended or collapsed state; wherein at least one of the connection assemblies is configured as the pole connection assembly for a collapsible cart.

The present utility model may further include any one or more of the following alternative forms according to the technical idea described above.

According to some alternative embodiments, the frame comprises a plurality of said connection assemblies, at least one of which is configured as a secondary connection assembly comprising at least two cross-arranged secondary connection members comprising a third and a fourth connecting rod hinged to each other and hinged to the adjacent uprights, respectively.

According to some alternative embodiments, in the secondary connection assembly, the secondary connection members of the cross arrangement have crossing points and are hinged at the crossing points.

According to some alternative embodiments, the frame further comprises a chassis hinged between the plurality of uprights, and in the deployed state, the chassis defines a chassis plane.

According to some alternative embodiments, in the deployed state, the first and second connection bars of the pole connection member are on the same line and are both in the chassis plane in the pole connection assembly.

According to some alternative embodiments, the pole connection assembly comprises at least two pole connection members arranged at a distance from each other, the first and second connection bars of the pole connection member located uppermost in the pole connection assembly being in the deployed state on the same straight line and both in the chassis plane.

According to some alternative embodiments, the chassis comprises a plurality of bottom struts, the bottom struts having converging ends and diverging ends, the converging ends of each bottom strut being hinged, the diverging ends of each bottom strut being hinged to the plurality of uprights, respectively, and adapted to rotate about the respective converging ends away from or towards each other.

According to some alternative embodiments, each of the bottom struts has an equal length.

According to some alternative embodiments, the chassis has a second blocking portion adapted to unidirectionally block rotation of the bottom struts when the frame is in the deployed state, such that the plurality of bottom struts collectively define the chassis plane.

According to some alternative embodiments, the chassis further comprises a hinge base having a plurality of hinge slots respectively forming a hinge slot bottom wall and a hinge slot side wall, the hinge slot bottom wall being configured as the second blocking portion, the converging ends of the plurality of bottom struts being respectively inserted into the plurality of hinge slots and hinged at the hinge slot side wall.

According to some alternative embodiments, the frame further comprises a handle assembly including a handle base and a handle bar mounted on the handle base.

According to some alternative embodiments, the frame further comprises a handle steering assembly comprising a handle steering bar having one end hinged to the upright and the other end hinged to the handle base.

According to some alternative embodiments, the handle bar is hinged to the upright by means of a hinge block.

According to some alternative embodiments, the handle bar is configured as a telescopic bar and comprises: the lower pipe body is fixedly arranged on the handle seat, and an upper locking hole and a lower locking hole which are axially spaced are formed in the side wall of the lower pipe body; the upper pipe body is inserted into the lower pipe body, an elastic piece is arranged on the upper pipe body and connected with the movable button through the elastic piece, and the elastic piece is suitable for biasing the movable button towards the side wall of the lower pipe body so that the movable button partially extends out of the upper locking hole or the lower locking hole.

According to some optional embodiments, a connecting block piece suitable for being placed in the lower pipe body is fixedly arranged on the upper pipe body, a blind hole is formed in the connecting block piece, and the elastic piece and the movable button are arranged in the blind hole.

The vertical rod connecting component for the foldable trolley has the advantages of few connecting rods and convenience in folding, and the foldable trolley comprising the vertical rod connecting component occupies small space after being folded and is convenient to store and carry.

Drawings

Features, advantages and other aspects of embodiments of the present utility model will become more apparent upon reference to the following detailed description, taken in conjunction with the accompanying drawings, wherein like reference numerals designate the same or similar parts throughout the several embodiments thereof, which are shown by way of illustration and not limitation.

FIG. 1 is a schematic view of an exemplary embodiment of a pole connection assembly for a collapsible cart, shown in an extended state, according to the present utility model;

FIG. 2 is a schematic view of the pole coupling assembly of FIG. 1 coupled to a pole, shown in an extended position;

FIG. 3 is a schematic view of the connecting pole of the pole connecting assembly of FIG. 1 shown in a semi-closed condition;

FIG. 4 is a schematic view of the pole coupling assembly of FIG. 1 coupled to the pole, shown in a closed position;

FIG. 5 is a schematic view of an exemplary embodiment of a channel shell connection;

FIG. 6 is a schematic view of a channel shell connection connecting a first connection rod and a second connection rod;

FIG. 7 is a schematic view of an exemplary embodiment of a collapsible cart, shown in an expanded state, according to the present disclosure;

FIG. 8 is a schematic view of the collapsible pushchair of FIG. 7 in a semi-collapsed condition;

FIG. 9 is a schematic view of the collapsible cart of FIG. 7 in a collapsed condition;

FIG. 10 is a schematic view of an exemplary embodiment of a chassis, shown with the ends of the chassis semi-gathered;

FIG. 11 is a schematic view of an exemplary embodiment of a hinge base;

FIG. 12 is a schematic view of an exemplary embodiment secondary connection assembly connection pole, shown in an extended state;

FIG. 13 is a schematic view of the secondary connection assembly of FIG. 12 in a semi-closed configuration;

FIG. 14 is a schematic view of the secondary connection assembly of FIG. 12 in a closed position;

FIG. 15 is a schematic view of an exemplary embodiment of a handle assembly and a handle steering assembly;

FIG. 16 is a cross-sectional view of an exemplary embodiment of a handle assembly;

fig. 17 is an enlarged view of the R portion in fig. 16.

Reference numerals: 1-a frame; 2-wheels; 100-vertical rod connecting components; 100A-a first barrier; 110-a pole connecting member; 111-a first connecting rod; 111A-the proximal end of the first connecting rod; 111B-the distal end of the first connecting rod; 112-a second connecting rod; 112A-the proximal end of the second connecting rod; 112B-the distal end of the second connecting rod; 120-channel shell connection; 121-a trough bottom wall of the trough shell connection; 122-groove side walls of the groove-shaped shell connection; a notch of the 123-channel housing connector; 200-vertical rods; 300-time connection assembly; 310-secondary connection members; 311-a third connecting rod; 312-fourth connecting rod; 400-underframe; 400A-a second barrier; 410-bottom struts; 410A-converging ends of the bottom struts; 410B-the divergent end of the bottom struts; 420-hinge seat; 421-hinge slots; 421A-hinge slot bottom wall; 421B-hinge slot sidewalls; 422-plate-like member; 500-handle assembly; 510-a handle base; 520-handle bar; 521-lower pipe body; 521A-upper locking hole; 521B-lower locking hole; 522-upper tube body; 522A-connecting block piece; 522B-an elastic member; 522C-a movable button; 522C 1-unextended portion of the movable knob; 522C 2-an extendable portion of the movable knob; 530-handle; 600-handle steering assembly; 610-handle steering lever; 620-hinge blocks; c-foldable cart; p-chassis plane.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the case where a directional instruction is involved in the embodiment of the present utility model, the directional instruction is merely used to explain the relative positional relationship, movement condition, etc. between the components in a specific posture, and if the specific posture is changed, the directional instruction is changed accordingly.

In this specification, terms such as "upper", "lower", "bottom" and the like are defined in terms of positions of the collapsible cart when in normal use. In the specification, one side of the handle bar of the foldable cart is the front side, and the other opposite side is the back side; it should be understood that this is not a limitation.

In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

In view of the fact that the folding cart in the prior art has too many rods and is not smooth to fold or has a simple folding structure, and still occupies a large space after being folded, the utility model firstly provides the upright rod connecting component for the folding cart, which has a simple structure and less connecting rods; and then proposes a foldable trolley comprising the vertical rod connecting component, and has the characteristics of convenience in folding, small occupied space and convenience in carrying.

Referring to fig. 1 to 4, an upright connection assembly 100 for a collapsible cart according to the present utility model (hereinafter, upright connection assembly 100) is exemplarily shown, the upright connection assembly 100 is collapsible to have an extended state and a closed state, and is hingeable between adjacent uprights of the collapsible cart, the upright connection assembly 100 includes at least one upright connection member 110, the upright connection member 110 includes a first connection rod 111 and a second connection rod 112, the first connection rod 111 has an approaching end 111A and a far end 111B, the second connection rod 112 has an approaching end 112A and a far end 112B, the approaching end 111A of the first connection rod 111 and the approaching end 112A of the second connection rod 112 are hingeable with the adjacent uprights of the collapsible cart, respectively, and the far end 111B of the first connection rod 111 and the far end 112B of the second connection rod 112 are rotatable about the respective approaching ends 111A, 112A to be far or near each other. When the distal end 111B of the first connecting rod 111 and the distal end 112B of the second connecting rod 112 are moved away from each other, as shown in fig. 2, the upright connecting assembly 100 is extended to an extended state, and the adjacent two uprights of the collapsible cart are also moved away from each other; when the distal end 111B of the first connecting rod 111 and the distal end 112B of the second connecting rod 112 are close to each other, as shown in fig. 4, the upright connecting assembly 100 is folded into a folded state, and the adjacent two uprights of the foldable wagon are also close to each other. Thus, the first connecting rod 111 and the second connecting rod 112 realize the folding of the vertical rod connecting assembly 100, and compared with the existing connecting assemblies or connecting modes, such as the connecting mode of two groups of X assemblies adopted in the side frame disclosed by CN103895672A, the vertical rod connecting assembly 100 has simple structure and less connecting rods. Figures 7 to 9 show the use of a pole connection assembly 100 in a collapsible cart C, wherein the pole connection assembly 100 may comprise at least two pole connection members 110 arranged in a spaced apart relationship, as will be described in more detail below.

In some embodiments, the pole coupling assembly 100 may include at least two spaced apart pole coupling members 110, and the first coupling bars 111 are parallel to one another and the second coupling bars 112 are also parallel to one another in the pole coupling assembly 100 or in the at least two spaced apart pole coupling members 110 described above. In particular, in the preferred embodiment, the lengths of the first connecting bars 111, which are parallel to each other, are the same, and the lengths of the second connecting bars 112, which are parallel to each other, are the same. Thus, the total four hinge points of the two ends (the approaching end 111A and the separating end 111B) of any two first connecting rods 111 are located at the four corners of one parallelogram, respectively, and the total four hinge points of the two ends (the approaching end 112A and the separating end 112B) of any two second connecting rods 112 are also located at the four corners of one parallelogram, respectively. Thus, the first connecting rods 111 form opposite sides of the parallelogram mechanism, the second connecting rods 112 form opposite sides of the parallelogram mechanism, and the first connecting rods 111 are always parallel to each other and the second connecting rods 112 are always parallel to each other during the extending and folding process of the vertical rod connecting assembly 100. In this way, the folding of the upright connecting assembly 100 is realized by the parallelogram structure formed by the first connecting rods 111 and the second connecting rods 112, and the structure is simple, the number of connecting rods is small, and the structure can not be folded easily after the extension, so that the extension state can be well maintained. Fig. 2 to 4 show the pole coupling assembly 100 in an extended state, a semi-closed state and a closed state, respectively. It should be appreciated that in some other embodiments of the pole coupling assembly 100, the lengths of the first coupling bars 111 may be different and/or the lengths of the second coupling bars 112 may be different; it is also possible that the first connecting rods 111 are not parallel or at least not always parallel and/or that the second connecting rods 112 are not parallel or at least not always parallel.

It should be appreciated that in the embodiment of the collapsible cart C shown in fig. 7-9, the spacing arrangement between the pole connection members 110 in a single pole connection assembly 100 is preferably an up-down spacing arrangement, i.e., the pole connection assembly 100 is configured to include at least two pole connection members 110 that are spaced up-down, which may provide additional benefits. For example, as shown in fig. 2 and 7, in the extended state of the pole coupling assembly 100, for a single pole 200 of the adjacent two poles 200 of the foldable wagon C coupled by the pole coupling assembly 100, there are two or more pole coupling members 310 hinged thereto, and these hinge points are constrained to each other, so that the pole 200 does not individually rotate around any hinge point to be tilted, ensuring the stability of the foldable wagon C in the extended state of the pole coupling assembly 100.

Preferably, in the pole connecting assembly 100, the length of the first connecting rod 111 is equal to the length of the second connecting rod 112, for example, the first connecting rod 111 and the second connecting rod 112 are symmetrical (e.g., about the point where they are hinged), so that the first connecting rod 311 and the second connecting rod 312 can be symmetrically rotated to achieve the extension and closure of the pole connecting assembly 100. It should be understood that the technical features of the length of the first connecting rod 111 being equal to the length of the second connecting rod 112, which are parallel to each other and have the same length as the first connecting rod 111, and the first connecting rod 112 being parallel to each other and having the same length, may be combined.

It should be appreciated that the rotation of the first and second connecting rods 111, 112 after the pole connecting assembly 100 is extended from the closed position to the extended position is required to prevent the first and second connecting rods 111, 112 from continuing to rotate after the pole connecting assembly 100 is extended into position, so in some embodiments, as shown in fig. 5 and 6, the pole connecting assembly 100 may further have a first blocking portion 100A, the first blocking portion 100A may unidirectionally prevent the first and second connecting rods 111, 112 from rotating when the pole connecting assembly 100 is in the extended position, i.e., prevent the first and second connecting rods 111, 112 from continuing to rotate from the closed position to the extended position after the pole connecting assembly 100 is extended from the closed position to the extended position. In particular, as in the collapsible cart C shown in fig. 7-9, for a pole connection assembly 100 configured to include at least two pole connection members 110 arranged in a spaced apart relationship above and below, the first blocking portion 100A prevents the proximal ends 111A, 112A of the first and second connecting bars 111, 112 from continuing to move downwardly.

In some further embodiments, as shown in fig. 5 and 6, the pole coupling assembly 100 includes a channel shell coupling 120, the channel shell coupling 120 having a notch 123 forming a channel bottom wall 121 and a channel side wall 122, the channel bottom wall 121 being configured as a first stop 100A. The first connecting rod 111 and the second connecting rod 112 are hinged through the channel shell connecting piece 120, the approaching end 111A of the first connecting rod 111 and the approaching end 112A of the second connecting rod 112 are respectively inserted into the channel shell connecting piece 120 from two ends of the notch 123 and hinged to the channel side wall 122 of the channel shell connecting piece 120, the channel bottom wall 121 of the channel shell connecting piece 120 serves as a first blocking part 100A, and after the vertical rod connecting assembly 100 is stretched from the closed state to the stretched state, the side surface of the approaching end 111A of the first connecting rod 111 and the side surface of the approaching end 112A of the second connecting rod 112 respectively abut against the channel bottom wall 121 (namely the first blocking part 100A), so that the first connecting rod 111 and the second connecting rod 112 cannot rotate continuously but can be folded in a revolving manner. In particular, as in the collapsible cart C shown in fig. 7 to 9, the pole connection assembly 100 is configured to include at least two pole connection members 110 arranged at intervals up and down, the notch 123 of the channel-shaped case link 120 is opened downward, and the side face of the approaching end 111A of the first connecting rod 111 and the side face of the approaching end 112A of the second connecting rod 112 abut against the channel bottom wall 121 of the channel-shaped case link 120, respectively, while the pole connection assembly 100 is in the extended state, and cannot continue the downward movement. It should be understood that, according to this function, the first blocking portion 100A may have other various implementation forms, which will not be described herein.

It should be appreciated that when the pole coupling assembly 100 includes only one pole coupling member 110, one of the above-described channel housing connectors 120 may be configured to couple the first and second connection bars 111 and 112 of the pole coupling member 110. When the pole connecting assembly 100 includes at least two pole connecting members 110, the above-described channel case connectors 120 may be individually configured for the pole connecting members 110 to connect the first connecting rod 111 and the second connecting rod 112 of the single pole connecting member 110, and at this time, a connector (not shown), such as a connecting plate, may be further provided to connect the channel case connectors as a unit, thereby achieving synchronous stretching and folding actions of the respective pole connecting members 110 and increasing the strength of the entire pole connecting assembly 100; as shown in fig. 1 to 6, a single channel-shaped housing link 120 may be provided, and the approaching ends 111A of the first link 111 and 112A of the second link 112 of each of the pole-connecting members 110 are respectively inserted into the channel-shaped housing link 120 from both ends of the notch 123 and hinged to the channel side wall 122 of the channel-shaped housing link 120, so that the structure is simplified and the synchronous extension and closure actions of each of the pole-connecting members 110 in a single pole-connecting assembly can be achieved, wherein after the pole-connecting assembly 100 is extended from the closed state to the extended state, the side of the approaching end 111A of the first link 111 and the side of the approaching end 112A of the second link 112 of at least one pole-connecting member 110 are respectively abutted against the channel bottom wall 121 of the channel-shaped housing link 120. For the pole connecting assembly 100 configured to include at least two pole connecting members 110 arranged at a distance from each other in the foldable cart C, it may be that the side of the approaching end 111A of the first connecting pole 111 and the side of the approaching end 112A of the second connecting pole 112 of the pole connecting member 110 positioned at the uppermost side abut the groove bottom wall 121 of the groove-shaped case connecting piece 120, respectively, such that the first connecting pole 111 and the second connecting pole 112 in the entire pole connecting assembly 100 cannot continue to rotate.

Fig. 7 to 9 exemplarily show a foldable cart C according to the present utility model, comprising a frame 1 and a plurality of wheels 2 arranged on the frame 1, the frame 1 having an unfolded state and a folded state, in which the wheels 2 are at the bottom of the frame 1. The frame 1 comprises a plurality of uprights 200 and one or more connection assemblies, wherein at least one of the connection assemblies is configured as the upright connection assembly 100.

The plurality of upright posts 200 are arranged along the circumferential direction of the frame 1, and the connecting assemblies are respectively hinged between two adjacent upright posts 200 along the circumferential direction of the frame 1, and are foldable so as to be capable of being unfolded and folded, so that the frame 1 is in an unfolded state or a folded state. It should be understood that the number of connection assemblies may vary according to the actual needs, for example, it may be ensured that connection assemblies are connected between each adjacent upright 200, for example, when the number of uprights 200 is two (as will be described later, "the number of bottom struts 110 is two and arranged in V-shape in the unfolded state"), the number of connection assemblies may be one; when the number of the vertical bars 200 is three or more, the number of the connection members may be equal to the number of the vertical bars 200, and also three or more. Of course, in some embodiments, multiple (two or more) connection assemblies may also be provided between a pair of adjacent posts 200.

In embodiments having only one connection assembly, the one connection assembly is configured as the pole connection assembly 100 described above. In embodiments that include a plurality of connection assemblies, at least one of the plurality of connection assemblies is configured as the pole connection assembly 100 described above. When applied to the collapsible cart C, the access end 111A of the first connecting rod 111 and the access end 112A of the second connecting rod 112 can be moved downward or upward, such that their distal ends 111B, 112B are rotated about the respective access ends 111A, 112A to be moved away from or toward each other, thereby allowing the pole connecting assembly 100 to be extended or closed. When the pole connecting assembly 100 is extended to the extended state, the frame 1 is extended to the extended state, and when the pole connecting assembly 100 is folded to the folded state, the frame 1 is folded to the folded state. Preferably, the frame 1 includes a pole connecting assembly 100 configured to include at least two pole connecting members 110 arranged in a spaced apart relationship.

Because the pole connecting assembly 100 has few connecting rods and is convenient to fold, the foldable cart C comprising the pole connecting assembly 100 occupies small space after being folded and is convenient to store and carry.

The frame 1 may further comprise a chassis 400, the chassis 400 being hinged between the plurality of uprights 200, the chassis 400 defining a chassis plane P in the unfolded state of the frame 1, on which chassis 400/chassis plane P the objects to be transported can be placed. In some embodiments, the chassis 400 may be foldable, as shown in fig. 10, the chassis 400 includes a plurality of bottom struts 410, the bottom struts 410 having converging ends 410A and diverging ends 410B, each bottom strut 110 being the same length and arranged at an angle to each other, and the converging ends 410A of each bottom strut 410 being hinged, the diverging ends 410B of each bottom strut 410 being rotatable about the respective converging ends 410A to be away from or gathered together, each upright 200 being circumferentially arranged about the hinged respective converging ends 410A and being respectively hinged at the diverging ends 410B of each bottom strut 410. When the divergent ends 410B are moved away from each other, the uprights 200 are moved away from each other and the frame 1 is unfolded synchronously to an unfolded state; when the divergent ends 410B are gathered together, the uprights 200 are brought closer together and the frame 1 is folded in a synchronous manner. In the unfolded state, the individual bottom struts 410 together define the chassis plane P described above. The number of bottom struts 410 may be the same as the number of uprights 200, and may be two or more, including three or more, four or more, five or more, and the like. For example, in the embodiment shown in fig. 7, the number of bottom struts 410 is four, and the four bottom struts 410 are arranged in an X-shape in the unfolded state. In other embodiments not shown, the number of bottom struts 410 may be three, arranged in a Y-shape in the deployed state, such as with respect to the embodiment shown in fig. 7, with only one bottom strut extending rearward and two bottom struts extending forward (not shown); alternatively, the number of bottom struts 410 may be two, arranged in a V-shape in the deployed state, such as with respect to the embodiment shown in fig. 7, with only two bottom struts extending forward (not shown). Of course, the bottom struts 410 may be five, six, seven, eight, etc. in other numbers, as desired.

In some embodiments, the pole coupling assembly 100 includes only one pole coupling member 110, and in the pole coupling assembly 100, the first and second connection bars 111 and 112 of the pole coupling member 110 are on the same straight line in the extended state of the pole coupling assembly 100. When the pole connecting assembly 100 is used in a collapsible cart C, in the unfolded state of the frame 1, i.e. in the extended state of the pole connecting assembly 100, the first and second connecting bars 111, 112 of the pole connecting assembly 100 are not only on a straight line, but also in the chassis plane P, to structurally strengthen the chassis 400 defining the chassis plane P and together carry the objects to be transported.

In other embodiments, where the pole coupling assembly 100 includes at least two pole coupling members 110 that are spaced apart, it is possible that each pole coupling member 110 of the pole coupling assembly 100 is configured such that the first and second connecting bars 111, 112 are collinear in the extended state of the pole coupling assembly 100. When the pole connecting assembly 100 is applied in a collapsible cart C, as in the embodiment shown in fig. 7 to 9, the pole connecting assembly 100 is configured to include at least two pole connecting members 110 arranged at a top-bottom interval, and in the unfolded state of the frame 1, a first connecting rod 111 and a second connecting rod 112 of the pole connecting member 110 located at the uppermost side of the pole connecting assembly 100 are on the same straight line and in the chassis plane P. Thus, in the unfolded state, the uppermost pole connecting member 110 of the pole connecting assembly 100 can structurally reinforce the chassis 400 defining the chassis plane P and carry the object to be transported together with the chassis 400, can enhance the carrying capacity of the foldable cart C, and can press the object to be transported against the pole connecting member 110 during use, thus preventing the pole connecting member 110 from being folded during use by the weight of the object to be transported.

It should be understood that, according to practical needs, all the connection assemblies of the frame 1 may be configured as the rod connection assemblies 100, for example, in some embodiments in which all the connection assemblies are configured as the rod connection assemblies 100 including at least two rod connection members 110 arranged at intervals, in the unfolded state, the first connection rod 111 and the second connection rod 112 of the rod connection member 110 located at the uppermost side of each rod connection assembly 100 are all in the chassis plane P, so that each rod connection assembly 100 and the chassis 400 together form a platform for placing objects, and at this time, the upper end of the rod 200 may also be arranged to be flush with the chassis plane P, so that no railing is provided, thereby facilitating placement of objects with larger dimensions; it is also possible that part of the connection assemblies are configured as pole connection assemblies 100, and the other connection assemblies may be configured in any existing or non-existing suitable form, as in the embodiment shown in fig. 7 to 9, of the four connection assemblies, two opposite connection assemblies are configured as pole connection assemblies 100, two pole connection assemblies 100 are symmetrically arranged on the left and right sides of the frame 1/chassis 400, and the other two opposite connection assemblies are configured as secondary connection assemblies 300, which will be described later.

When the frame 1 has a plurality of connection assemblies, it is also possible that at least one of the plurality of connection assemblies is configured as the upright connection assembly 100 while ensuring that at least one of the plurality of connection assemblies is configured as the sub-connection assembly 300, the sub-connection assembly 300 includes two sub-connection members 310 arranged in a crossing manner, one end of one sub-connection member 310 is hinged at an upper end of one of the adjacent uprights 200, the other end is hinged at a lower end of the other of the adjacent uprights 200, and the other sub-connection member 310 is arranged in a diametrically opposite manner to form a crossing arrangement. Specifically, the sub connection member 310 includes a third connection rod 311 and a fourth connection rod 312 hinged to each other, and the third connection rod 311 and the fourth connection rod 312 are respectively hinged to the adjacent two upright rods 200. When the third link 311 and the fourth link 312 of the sub link member 310 are rotated away from each other, the angle between the third link 311 and the fourth link 312 becomes large, the sub link assembly 300 is extended, the adjacent two uprights 200 are also moved away from each other, and the frame 1 is unfolded to be unfolded as shown in fig. 7 and 12; when the third connecting rod 311 and the fourth connecting rod 312 of the sub connecting member 310 are rotated to be closed, the included angle between the third connecting rod 311 and the fourth connecting rod 312 becomes smaller, the sub connecting assembly 300 is closed, the adjacent two uprights 200 are also close to each other, and the frame 1 is folded to be in a folded state, as shown in fig. 9 and 14. The intersecting secondary connection members 310 may act as rails and may prevent objects to be transported from sliding off. In the sub-coupling assembly 300, the sub-coupling members 310 arranged to cross have crossing points and are hinged at the crossing points, and in the sub-coupling members 310, the fourth coupling rod 312 is longer than the third coupling rod 311, and the two fourth coupling rods 312 are crossed and hinged, so that the two sub-coupling members 310 are interlocked with each other during the unfolding or folding. It should be appreciated that the secondary connection assembly 300 may include an appropriate number of cross-disposed secondary connection members 310 of two or more, and in particular an even number of two or more. In particular, in the single sub-coupling assembly 300, the sub-coupling members 310 are symmetrical in pairs, as in the embodiment shown in fig. 12 to 14, in the sub-coupling assembly 300, two sub-coupling members 310 are symmetrical (about their crossing points). The embodiment shown in fig. 7 to 9 illustrates a frame having four connection assemblies, of which two opposite connection assemblies are configured as sub-connection assemblies 300, two sub-connection assemblies 300 are symmetrically arranged at the front and rear sides of the frame 1/chassis 400, and the other two opposite connection assemblies are configured as the above-mentioned pole connection assemblies 100.

It should be appreciated that the connection assemblies of the collapsible cart C are preferably configured as the pole connection assemblies 100. For example, in some embodiments, frame 1 includes only one connection assembly, then the connection assembly is configured to form rod connection assembly 100; in other embodiments, the frame 1 includes a plurality of (here, a plurality includes two or more, three or more, etc.) connection assemblies, and other connection assemblies may be configured as the pole connection assembly 100 or as the secondary connection assembly 300, or as other existing or non-existing suitable connection assemblies, as desired, while ensuring that one connection assembly is configured as the pole connection assembly 100.

Preferably, as shown in the embodiment of fig. 1 to 4 and 7 to 9, the pole connecting assembly 100 includes two pole connecting members 110 arranged at a distance from each other, and in a single pole connecting member 110, a first connecting rod 111 and a second connecting rod 112 (e.g., a point about which they are hinged) are symmetrically arranged, and the two pole connecting assemblies 100 are symmetrically arranged at the left and right sides of the frame 1; the secondary connection assembly 300 includes two cross-disposed secondary connection members 310, the two cross-disposed secondary connection members 310 being hinged at their crossing points, and in the secondary connection assembly 300, the two cross-disposed secondary connection members 310 (e.g., about their crossing points) are symmetrical, and the two secondary connection assemblies 300 are symmetrically disposed on the front and rear sides of the vehicle frame 1; each bottom strut 410 of the bottom chassis 400 has an equal length. It should be appreciated that the stretching, folding, gathering, and the like between the various connection components of the collapsible cart C, between the connection components and the chassis 400, are coordinated to effect the unfolding and folding of the collapsible cart C.

After each bottom strut 410 rotates to the expanded state of frame 1 from the collapsed state, it is desirable to prevent each bottom strut 410 from continuing to rotate after frame 1 is expanded into place, so in some embodiments, as shown in fig. 10, bottom frame 400 has a second blocking portion 400A that can unidirectionally prevent each bottom strut 410 from rotating, i.e., prevent converging ends 410A of each bottom strut 410 from moving downward, when frame 1 is in the expanded state, and bottom struts 410 together define a bottom frame plane P by second blocking portion 400A. In some further embodiments, referring to fig. 10 and 11, the chassis 400 further includes a hinge base 420, and the converging ends 410A of the respective bottom struts 410 are hinged by the hinge base 420, and in the embodiments shown in fig. 10 and 11, the hinge base 420 has a plurality of hinge slots 421, and each hinge slot 421 forms a hinge slot bottom wall 421A and hinge slot side walls 421B, respectively. The hinge groove 421 may be downwardly opened, and in particular, the hinge seat 420 may include a plate 422, and the hinge groove sidewall 421B extends downwardly from a bottom side of the plate 422, thereby forming the hinge groove 421 opened downwardly. The converging ends 410A of the respective bottom struts 410 are inserted into the respective hinge slots 421 and hinge-coupled to hinge slot sidewalls 421B of the hinge slots 421 by pins. The bottom pole 410 is rotatable about the pin/converging end 410A, and in the unfolded state, the hinge groove bottom wall 421A is configured as the second blocking portion 400A, and the bottom pole 410 is rotatable until the hinge groove bottom wall 421A of the hinge groove 421 (or the bottom side surface of the plate 422) abuts against the side surface of the converging end 410A of the bottom pole 410, thereby obtaining the chassis plane P described above.

It should be appreciated that during the process of moving or gathering the various bottom struts 410 of base 400 away from each other, the converging ends 410A of bottom struts 410 also move downward or upward while frame 1 expands or folds. Therefore, during the use of the foldable cart C, the hinge seat 420 hinged to the converging end 410A may also serve as a point of application for folding and unfolding the frame 1, when the frame 1 is to be folded, the hinge seat 420 is held and lifted upwards, the converging end 410A moves upwards, the frame 1 may be folded into a folded state, and when the frame 1 is to be unfolded, the hinge seat 420 is pressed downwards, the converging end 410A moves downwards, and the frame 1 may be unfolded into an unfolded state. It should also be appreciated that in some embodiments, not shown, the wheel 2 may be mounted to the hinge base 420, such as the wheel 2 being mounted between the plurality of hinge slots 421 described above, to provide support in the deployed state of the frame 1. It will also be appreciated that in some embodiments, such as when the plate 422 of the hinge seat 420 is of suitable dimensions, the foldable wagon C may be used as a stool in the folded state of the frame 1.

It should be appreciated that the second blocking portion 400A functions to unidirectionally block the rotation of the bottom struts 410 when the frame 1 is in the unfolded state, i.e., to block the converging ends 410A of the respective bottom struts 410 from moving downward, thereby forming the chassis plane P, so that other implementations of the second blocking portion 400A are possible depending on the function. For example, in the above-mentioned embodiment of arranging the bottom struts 410 in a V shape in the unfolded state, a blocking block (not shown) may be disposed below the hinge position of the upright 200 and the bottom struts 410, the blocking block may be disposed on the upright 200, and the blocking block forms a second blocking portion, and in the unfolded state, the blocking block abuts against the lower side surface of the diverging end 410B of the bottom struts 410, so as to prevent the converging end 410A of the bottom struts 410 from continuing to move downward.

It should be understood that the plurality of wheels 2 of the frame 1 may be disposed at suitable positions on the frame 1 according to actual needs, including on the bottom strut 410, the first connecting rod 111 and the second connecting rod 112, and preferably the plurality of wheels 2 are disposed at lower ends of the upright 200, respectively, and alternatively the wheels 2 may be configured as universal wheels.

It should be appreciated that the first connecting rod 111, the second connecting rod 112, the upright 200, the third connecting rod 311, the fourth connecting rod 312, and the bottom strut 410 described herein may be any suitable form of rod including, but not limited to, straight rods, arcuate rods, undulating rods, etc., or combinations thereof (e.g., portions of the entire rod are straight, portions of the rod are undulating, etc.), with straight rods being preferred.

In some embodiments, as shown in fig. 7 to 9 and 15, the frame 1 further includes a handle assembly 500 for pushing and pulling the foldable cart C, and the handle assembly 500 includes a handle base 510 and a handle lever 520 mounted on the handle base 510, and a handle 530 may be mounted on an upper end of the handle lever 520 to facilitate pushing and pulling. Meanwhile, in order to facilitate folding of the frame 1 and rotation of the handle bar 520, the frame 1 may further include a handle steering assembly 600, the handle steering assembly 600 including a pair of handle steering bars 610, the pair of handle steering bars 610 being respectively provided at both sides of the handle holder 510, the handle assembly 500 being hinge-mounted between two adjacent uprights 200 through the pair of handle steering bars 610, one end of the handle steering bar 610 being hinge-mounted to the uprights 200, and the other end being hinge-mounted to the handle holder 510. Preferably, a pair of handle levers 610 are symmetrically disposed at both sides of the handle base 510. It should be appreciated that the extension and closure of the pair of handle levers 610 is coordinated with the extension, closure, gathering, and the like of the linkage assembly, the chassis 400. As shown in fig. 7 to 9 and 15, the handle bar 610 is hinged to the upright 200 by a hinge block 620. The hinge block 620 is hinged with the handle bar 610 and the upright 200, respectively, and in particular, the hinge block 620 is hinged with the upright 200 such that the handle assembly 500 and the handle bar 610 can be integrally flipped with respect to the chassis plane P; the hinge block 620 is hinged to the handle bar 610, and thus can cooperate with the hinge between the handle bar 610 and the handle base 510, so that the pair of handle bars 610 can be unfolded or folded as the frame 1 is unfolded or folded.

In some embodiments, as shown in fig. 16 and 17, the handle bar 520 may be configured as a telescopic bar and includes a lower pipe 521 and an upper pipe 522, and a handle 530 is provided at an upper end of the upper pipe 522. The lower pipe body 521 is fixedly installed on the handle base 510, and an upper locking hole 521A and a lower locking hole 521B spaced apart in an axial direction are provided at a sidewall of the lower pipe body 521. The upper pipe body 522 is inserted into the lower pipe body 521, and the upper pipe body 522 is provided with an elastic member 522B and is connected with a movable button 522C through the elastic member 522B, and the elastic member 522B may bias the movable button 522C toward the side wall of the lower pipe body 521 so that the movable button 522C may partially protrude from the upper locking hole 521A or the lower locking hole 521B. As shown in fig. 16 and 17, the elastic member 522B may be configured as a compression spring, an elastic sheet, or the like, to give a biasing force to the movable button 522C, and the movable button 522C may partially protrude from the upper locking hole 521A or the lower locking hole 521B, for example, the non-protruding portion 522C1 of the movable button 522C may have a size larger than that of the upper locking hole 521A and the lower locking hole 521B, and the extendable portion 522C2 may have a size smaller than or equal to that of the upper locking hole 521A and the lower locking hole 521B, so as to be capable of partially protruding from the upper locking hole 521A or the lower locking hole 521B.

Pulling the upper pipe body 522 to move axially in the lower pipe body 521, the movable button 522C abuts against the inner side of the side wall of the lower pipe body 521 under the action of the elastic biasing force of the elastic member 522B, the handle 520 is extended, and when the movable button 522C is aligned with the upper locking hole 521A, the elastic member 522B pushes the movable button 522C to partially protrude from the upper locking hole 521A, thereby locking the upper pipe body 522 and the lower pipe body 521; pushing the upper tube 522 to move axially in the lower tube 521, the handle bar 520 shortens, and when the movable button 522C is aligned with the lower locking hole 521B, the elastic member 522B pushes the movable button 522C to partially protrude from the lower locking hole 521B, thereby locking the upper tube 522 and the lower tube 521. When the upper pipe body 522 and the lower pipe body 521 are locked, the lower movable button 522C to the movable button 522C are retracted so as not to protrude from the upper locking hole 521A or the lower locking hole 521B, and the lock between the upper pipe body 522 and the lower pipe body 521 can be released. In some embodiments, as shown in FIG. 17, the upper body 522 is fixedly connected to a connecting block piece 522A which can be inserted into the lower body 521, the connecting block piece 522A can be fixedly disposed at the lower end of the upper body 522 and has a blind hole 522D in which an elastic member 522B and a movable button 522C are disposed, and an unextended portion 522C1 of the movable button 522C is retained in the blind hole 522D during movement of the movable button 522C. Blind hole 522D provides installation space for resilient member 522B and movable button 522C and provides guidance for the resilient action of resilient member 522B configured as a compression spring. Of course, in other embodiments, the blind holes may also be provided directly in the upper tube 522.

It should be understood that the foregoing description of the preferred embodiments is not intended to limit the scope of the utility model, but rather to limit the scope of the claims, and that those skilled in the art can make substitutions or modifications without departing from the scope of the utility model as set forth in the appended claims.

Claims (22)

1. A pole connection assembly (100) for a collapsible cart, the pole connection assembly (100) having an extended state and a closed state and being adapted to be hinged between adjacent poles of the collapsible cart, characterized in that the pole connection assembly (100) comprises at least one pole connection member (110), the pole connection member (110) comprising a first (111) and a second (112) connecting rod, the first (111) and the second (112) connecting rod each having an approaching end (111A, 112A) and a distancing end (111B, 112B), the approaching ends (111A, 112A) of the first (111) and the second (112) connecting rod being adapted to be hinged with adjacent poles of the collapsible cart and being rotatable about the respective approaching ends (111A, 112A) to be distant from or close to each other, such that the pole connection assembly (100) is in the extended or closed state.

2. The pole connection assembly (100) according to claim 1, wherein the pole connection assembly (100) comprises at least two spaced apart pole connection members (110), wherein in at least two of the pole connection members (110), the first connection bars (111) are parallel to each other and the second connection bars (112) are parallel to each other.

3. The pole connection assembly (100) according to claim 2, wherein the lengths of the first connecting bars (111) parallel to each other are the same or different, and the lengths of the second connecting bars (112) parallel to each other are the same or different, among the at least two pole connection members (110).

4. The pole connection assembly (100) of claim 1, wherein the first connecting rod (111) and the second connecting rod (112) are equal in length.

5. The pole connection assembly (100) according to claim 1, wherein in the extended state the first (111) and second (112) connecting poles of the pole connection member (110) are on the same straight line.

6. The pole connection assembly (100) according to any one of claims 1 to 5, wherein the pole connection assembly (100) has a first blocking portion (100A), the first blocking portion (100A) being adapted to unidirectionally prevent the first connecting rod (111) and the second connecting rod (112) from rotating when the pole connection assembly (100) is in the extended state.

7. The pole coupling assembly (100) of claim 6, wherein the pole coupling assembly (100) further comprises a channel shell coupling member (120), the channel shell coupling member (120) having a slot opening (123) forming a channel bottom wall (121) and a channel side wall (122), the channel bottom wall (121) being configured as the first stop (100A), the access ends (111A, 112A) of the first and second connecting rods (111, 112) being inserted into the channel shell coupling member (120) from the slot opening (123) and hinged to the channel side wall (122), respectively.

8. Foldable trolley (C) comprising a frame (1), characterized in that the frame (1) has an unfolded state and a folded state and comprises:

-a plurality of uprights (200), said plurality of uprights (200) being circumferentially arranged along said frame (1);

One or more connection assemblies, which are arranged between adjacent uprights (200) in a hinged manner and are adapted to be stretched or folded so that the frame (1) is in the unfolded state or the folded state;

Wherein at least one of the connection assemblies is configured as a pole connection assembly (100) for a collapsible cart according to any one of claims 1 to 7.

9. The collapsible cart (C) according to claim 8, wherein the frame (1) comprises a plurality of said connection assemblies, at least one of the plurality of said connection assemblies being configured as a secondary connection assembly (300), the secondary connection assembly (300) comprising at least two cross-arranged secondary connection members (310), the secondary connection members (310) comprising a third connecting rod (311) and a fourth connecting rod (312) hinged to each other and the third connecting rod (311) and the fourth connecting rod (312) being hinged to the adjacent uprights (200), respectively.

10. The collapsible cart (C) according to claim 9, wherein in the secondary connection assembly (300) the secondary connection members (310) of a cross arrangement have crossing points and are hinged at said crossing points.

11. The collapsible cart (C) according to any one of claims 8 to 10, wherein the frame (1) further comprises a chassis (400), the chassis (400) being hinged between the plurality of uprights (200), and in the unfolded state the chassis (400) defines a chassis plane (P).

12. The collapsible cart (C) according to claim 11, wherein in the unfolded state, in the pole connection assembly (100), the first (111) and second (112) connection bars of the pole connection member (110) are on the same straight line and both in the chassis plane (P).

13. The collapsible cart (C) according to claim 11, wherein the pole connection assembly (100) comprises at least two pole connection members (110) arranged at a distance from each other up and down, in the unfolded state the first (111) and second (112) connecting rods of the pole connection members (110) located uppermost in the pole connection assembly (100) are on the same straight line and both in the chassis plane (P).

14. The collapsible cart (C) of claim 11, wherein the chassis (400) comprises a plurality of bottom struts (410), the bottom struts (410) having converging ends (410A) and diverging ends (410B), the converging ends (410A) of each bottom strut (410) being hinged, the diverging ends (410B) of each bottom strut (410) being hinged with the plurality of uprights (200) respectively and adapted to rotate about the respective converging ends (410A) away from or together.

15. The collapsible cart (C) of claim 14, wherein each of the bottom struts (410) have equal lengths.

16. The collapsible cart (C) according to claim 14, wherein the chassis (400) has a second blocking portion (400A), the second blocking portion (400A) being adapted to unidirectionally block the bottom struts (410) from rotating when the frame (1) is in the deployed state, and such that the plurality of bottom struts (410) together define the chassis plane (P).

17. The foldable cart (C) according to claim 16, wherein the chassis (400) further comprises a hinge base (420), the hinge base (420) having a plurality of hinge slots (421) respectively forming a hinge slot bottom wall (421A) and a hinge slot side wall (421B), the hinge slot bottom wall (421A) being configured as the second blocking portion (400A), the converging ends (410A) of the plurality of bottom struts (410) being respectively inserted into the plurality of hinge slots (421) and hinged at the hinge slot side wall (421B).

18. The foldable cart (C) according to claim 8, wherein the frame (1) further comprises a handle assembly (500), the handle assembly (500) comprising a handle base (510) and a handle bar (520) mounted on the handle base (510).

19. The collapsible cart (C) according to claim 18, wherein the frame (1) further comprises a handle steering assembly (600), the handle steering assembly (600) comprising a handle steering lever (610), the handle steering lever (610) being hinged at one end to the upright (200) and at the other end to the handle seat (510).

20. The collapsible cart (C) according to claim 19, wherein the handle steering bar (610) is hinged to the upright (200) by means of a hinge block (620).

21. The collapsible cart (C) of claim 18, wherein the handle bar (520) is configured as a telescoping bar and comprises:

A lower pipe body (521), wherein the lower pipe body (521) is fixedly arranged on the handle seat (510), and an upper locking hole (521A) and a lower locking hole (521B) which are axially spaced are arranged on the side wall of the lower pipe body (521);

An upper pipe body (522), the upper pipe body (522) is inserted in the lower pipe body (521), an elastic piece (522B) is arranged on the upper pipe body (522) and is connected with a movable button (522C) through the elastic piece (522B), and the elastic piece (522B) is suitable for biasing the movable button (522C) towards the side wall of the lower pipe body (521) so that the movable button (522C) partially extends out of the upper locking hole (521A) or the lower locking hole (521B).

22. The foldable cart (C) according to claim 21, wherein a connecting piece (522A) adapted to be placed in the lower tube (521) is fixedly arranged on the upper tube (522), a blind hole (522D) is arranged on the connecting piece (522A), and the elastic piece (522B) and the movable button (522C) are arranged in the blind hole (522D).