Vertical rod connecting assembly for foldable cart and foldable cart

Abstract

The invention discloses a vertical rod connecting assembly for a foldable cart and the foldable cart. The vertical rod connecting assembly has a stretching state and a folding state and is suitable for being connected between adjacent vertical rods of the foldable cart in a hinged mode, the vertical rod connecting assembly comprises at least one vertical rod connecting component, the vertical rod connecting component comprises a first connecting rod and a second connecting rod, and the first connecting rod and the second connecting rod are each provided with an approaching end and a far-away end. The approaching ends of the first connecting rod and the second connecting rod are hinged, and the far-away ends of the first connecting rod and the second connecting rod are respectively suitable for being hinged with adjacent vertical rods of the foldable cart and rotate around respective approaching ends to be far away from or close to each other, so that the vertical rod connecting assembly is stretched into a stretching state or folded into a folded state. The vertical rod connecting assembly is few in connecting rod pieces and convenient to fold, and the foldable cart comprising the vertical rod connecting assembly is small in occupied space after being folded and convenient to store and carry.

Description

Technical Field

[0001] The invention belongs to the technical field of carts, and in particular relates to a pole connecting assembly for a foldable cart and the foldable cart. Background Art

[0002] A cart is a commonly used transport tool in daily life and work, which brings great convenience to people. However, the existing conventional carts themselves have the problem of occupying a large space and are not easy to store and carry. In view of this, various foldable carts have been designed in the existing schemes, but most of them have too many rods and are not smooth to fold, or have a simple folding structure, which still occupies a large space after folding and is not easy to carry. Summary of the invention

[0003] The object of the present invention is to provide a pole connection assembly for a foldable cart and a foldable cart including the pole connection assembly. The pole connection assembly is foldable, has a simple structure, and has a small number of connecting rods; the foldable cart is easy to fold, occupies a small space after folding, and is easy to store.

[0004] To this end, according to one aspect of the present invention, a pole connecting assembly for a foldable cart is provided, wherein the pole connecting assembly has an extended state and a closed state and is suitable for being hingedly connected between adjacent poles of the foldable cart, the pole connecting assembly includes at least one pole connecting member, the pole connecting member includes a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod each having a proximal end and a distal end, the proximal ends of the first connecting rod and the second connecting rod are hinged, the distal ends of the first connecting rod and the second connecting rod are respectively suitable for being hinged with adjacent poles of the foldable cart and can rotate around their respective proximal ends to move away from or approach each other, so that the pole connecting assembly is in the extended state or the closed state.

[0005] According to the above technical concept, the present invention may further include any one or more of the following optional forms.

[0006] According to some optional embodiments, the vertical pole connection assembly includes at least two vertical pole connection components arranged at intervals, and in at least two of the vertical pole connection components, the first connection rods are parallel to each other, and the second connection rods are parallel to each other.

[0007] According to some optional embodiments, in at least two of the vertical pole connecting members, the first connecting rods parallel to each other have the same or different lengths, and the second connecting rods parallel to each other have the same or different lengths.

[0008] According to some optional embodiments, the first connecting rod and the second connecting rod are equal in length.

[0009] According to some optional embodiments, in the extended state, the first connecting rod and the second connecting rod of the vertical rod connecting member are on the same straight line.

[0010] According to some optional embodiments, the vertical pole connection assembly has a first blocking portion, and when the vertical pole connection assembly is in the extended state, the first blocking portion is suitable for unidirectionally preventing the first connecting rod and the second connecting rod from rotating.

[0011] According to some optional embodiments, the vertical pole connecting assembly also includes a groove-shaped shell connecting piece, which has a groove bottom wall and a groove side wall, the groove bottom wall constitutes the first blocking portion, and the proximal ends of the first connecting rod and the second connecting rod are respectively inserted into the groove-shaped shell connecting piece from the groove and hinged to the groove side wall.

[0012] According to another aspect of the present invention, a foldable cart is provided, comprising a frame, the frame having an unfolded state and a folded state, and comprising: a plurality of uprights, the plurality of uprights being arranged along the circumference of the frame; one or more connecting assemblies, the connecting assemblies being hingedly disposed between adjacent uprights and being adapted to be extended or closed so that the frame is in the unfolded state or the folded state; wherein at least one of the connecting assemblies is configured as the upright connecting assembly for a foldable cart.

[0013] According to the above technical concept, the present invention may further include any one or more of the following optional forms.

[0014] According to some optional embodiments, the frame includes a plurality of the connection assemblies, at least one of the plurality of the connection assemblies is configured as a secondary connection assembly, the secondary connection assembly includes at least two cross-arranged secondary connection members, the secondary connection members include a third connecting rod and a fourth connecting rod hinged to each other, and the third connecting rod and the fourth connecting rod are respectively hinged to adjacent uprights.

[0015] According to some optional embodiments, in the secondary connection assembly, the secondary connection members arranged in a cross-arrangement have a cross point and are hinged at the cross point.

[0016] According to some optional embodiments, the frame further comprises a chassis, wherein the chassis is hinged between the plurality of uprights, and in the unfolded state, the chassis defines a chassis plane.

[0017] According to some optional embodiments, in the unfolded state, in the upright pole connection assembly, the first connecting rod and the second connecting rod of the upright pole connection member are on the same straight line and are both in the plane of the base frame.

[0018] According to some optional embodiments, the upright connection assembly includes at least two upright connection members spaced apart from each other in an upper and lower manner. In the unfolded state, the first connecting rod and the second connecting rod of the upright connection member located at the uppermost side of the upright connection assembly are on the same straight line and are both in the plane of the base frame.

[0019] According to some optional embodiments, the base frame includes a plurality of bottom support rods, each of the bottom support rods having a converging end and a diverging end, the converging ends of each of the bottom support rods are hinged to each other, and the diverging ends of each of the bottom support rods are respectively hinged to the plurality of vertical rods and are suitable for rotating around their respective converging ends to move away from or toward each other.

[0020] According to some optional embodiments, each of the bottom support rods has an equal length.

[0021] According to some optional embodiments, the bottom frame has a second blocking portion, and when the frame is in the unfolded state, the second blocking portion is suitable for unidirectionally preventing the bottom support rod from rotating, so that the plurality of bottom support rods jointly define the bottom frame plane.

[0022] According to some optional embodiments, the base frame also includes a hinge seat, which has a plurality of hinge grooves that respectively form a bottom wall and a side wall of the hinge groove, the bottom wall of the hinge groove constitutes the second blocking portion, and the converging ends of the plurality of bottom support rods are respectively inserted into the plurality of hinge grooves and hinged to the side walls of the hinge groove.

[0023] According to some optional embodiments, the frame further includes a handlebar assembly, wherein the handlebar assembly includes a handlebar seat and a handlebar rod mounted on the handlebar seat.

[0024] According to some optional embodiments, the frame further comprises a handlebar steering assembly, wherein the handlebar steering assembly comprises a handlebar steering rod, wherein one end of the handlebar steering rod is hinged to the vertical rod, and the other end of the handlebar steering rod is hinged to the handlebar seat.

[0025] According to some optional embodiments, the handlebar steering rod is hinged to the vertical rod via a hinge block.

[0026] According to some optional embodiments, the handle rod is configured as a telescopic rod and includes: a lower tube body, which is fixedly mounted on the handle base, and an upper locking hole and a lower locking hole spaced axially apart are provided on the side wall of the lower tube body; an upper tube body, which is inserted into the lower tube body, and an elastic member is provided on the upper tube body and a movable button is connected via the elastic member, and the elastic member is suitable for biasing the movable button toward the side wall of the lower tube body so that the movable button partially extends from the upper locking hole or the lower locking hole.

[0027] According to some optional embodiments, a connection block suitable for being placed in the lower tube body is fixedly provided on the upper tube body, a blind hole is provided on the connection block, and the elastic member and the movable button are arranged in the blind hole.

[0028] The upright pole connection assembly for a foldable cart of the present invention has fewer connecting rods and is convenient to fold. The foldable cart including the upright pole connection assembly occupies a small space after being folded, and is convenient to store and carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The features, advantages and other aspects of the embodiments of the present invention will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Several embodiments of the present invention are shown herein in an illustrative and non-restrictive manner. In the accompanying drawings, the same reference numerals represent the same or similar components.

[0030] Figure 1 is a schematic diagram of an exemplary embodiment of a pole connection assembly for a foldable stroller according to the present invention, shown in an extended state;

[0031] Figure 2 yes Figure 1 A schematic diagram of the vertical pole connecting assembly connected to the vertical pole is shown in an extended state;

[0032] Figure 3 yes Figure 1 A schematic diagram of the vertical pole connecting assembly connected to the vertical pole is shown in a semi-closed state;

[0033] Figure 4 yes Figure 1 A schematic diagram of the upright pole connection assembly connected to the upright pole is shown in a closed state;

[0034] Figure 5 is a schematic diagram of an exemplary embodiment of a channel shell connector;

[0035] Figure 6 is a schematic diagram of a grooved shell connector connecting a first connecting rod and a second connecting rod;

[0036] Figure 7 is a schematic diagram of an exemplary embodiment of a foldable stroller according to the present invention, shown in an unfolded state;

[0037] Figure 8 yes Figure 7 A schematic diagram of a foldable stroller in a semi-folded state;

[0038] Fig. 9 yes Figure 7 A schematic diagram of the foldable stroller shown in a folded state;

[0039] Fig.10is a schematic diagram of an exemplary embodiment of a chassis, shown with diverging ends semi-converged;

[0040] Fig.11 is a schematic diagram of an exemplary embodiment of an articulated seat;

[0041] Fig.12 is a schematic diagram of a secondary connection assembly connected to a vertical pole according to an exemplary embodiment, shown in an extended state;

[0042] Fig.13 yes Fig.12 A schematic diagram of the secondary connecting assembly connected to the vertical pole is shown in a semi-closed state;

[0043] Fig.14 yes Fig.12 A schematic diagram of the secondary connecting assembly connected to the vertical pole is shown in a closed state;

[0044] Fig.15 is a schematic diagram of an exemplary embodiment of a handlebar assembly and a handlebar steering assembly;

[0045] Fig.16 is a cross-sectional view of an exemplary embodiment of a handle assembly;

[0046] Fig.17 yes Fig.16 Enlarged view of the R part.

[0047] Figure numerals: 1-frame; 2-wheel; 100-pole connection assembly; 100A-first blocking portion; 110-pole connection member; 111-first connecting rod; 111A-proximal end of the first connecting rod; 111B-distal end of the first connecting rod; 112-second connecting rod; 112A-proximal end of the second connecting rod; 112B-distal end of the second connecting rod; 120-groove shell connection member; 121-groove bottom wall of the groove shell connection member; 122-groove side wall of the groove shell connection member; 123-groove opening of the groove shell connection member; 200-pole; 300-secondary connection assembly; 310-secondary connection member; 311-third connecting rod; 312-fourth connecting rod; 400-underframe; 400A-second blocking portion; 41 0-bottom support rod; 410A-converging end of bottom support rod; 410B-diverging end of bottom support rod; 420-hinge seat; 421-hinge slot; 421A-bottom wall of hinge slot; 421B-side wall of hinge slot; 422-plate-like member; 500-handle assembly; 510-handle seat; 520-handle rod; 521-lower tube body; 521A-upper locking hole; 521B-lower locking hole; 522-upper tube body; 522A-connecting block; 522B-elastic member; 522C-movable button; 522C1-unextended portion of movable button; 522C2-extended portion of movable button; 530-handle; 600-handle steering assembly; 610-handle steering rod; 620-hinge block; C-foldable cart; P-bottom frame plane. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] It should be noted that if a directional indication is involved in the embodiment of the present invention, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0050] In this specification, positional terms such as "upper", "lower", and "bottom" are defined according to the position of the foldable stroller when it is normally used. In this specification, the side where the handlebar of the foldable stroller is located is referred to as the "front", and the other side opposite is referred to as the "rear", but it should be understood that this does not constitute a limitation.

[0051] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0052] In view of the fact that the folding carts in the prior art either have too many rods and are difficult to fold, or have a simple folding structure and still occupy a large space after folding, the present invention first proposes a vertical rod connecting assembly for a foldable cart, which has a simple structure and reduces the number of connecting rods; and then proposes a foldable cart including the vertical rod connecting assembly, which has the characteristics of easy folding, small space occupation and easy carrying.

[0053] Reference Figures 1 to 4 The exemplary embodiment of the present invention shows a pole connection assembly 100 for a foldable stroller (hereinafter referred to as the pole connection assembly 100). The pole connection assembly 100 is foldable and has an extended state and a closed state, and can be hinged between two adjacent poles of the foldable stroller. The pole connection assembly 100 includes at least one pole connection member 110, and the pole connection member 110 includes a first connecting rod 111 and a second connecting rod 112. The first connecting rod 111 has a proximal end 111A and a distal end 111B, and the second connecting rod 112 has a distal end 111B and a distal end 111C. The rod 112 has a proximal end 112A and a distal end 112B. The proximal end 111A of the first connecting rod 111 and the proximal end 112A of the second connecting rod 112 are hinged, and the distal end 111B of the first connecting rod 111 and the distal end 112B of the second connecting rod 112 can be hinged to two adjacent vertical rods of the foldable cart, respectively. Moreover, the distal end 111B of the first connecting rod 111 and the distal end 112B of the second connecting rod 112 can rotate around their respective proximal ends 111A, 112A to move away from or toward each other. When the distal end 111B of the first connecting rod 111 and the distal end 112B of the second connecting rod 112 move away from each other, as shown in FIG. Figure 2 As shown, the upright connecting assembly 100 is extended to an extended state, and the two adjacent uprights of the foldable cart are also separated 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. Figure 4 As shown, the upright pole connection assembly 100 is folded into a folded state, and two adjacent upright poles of the foldable stroller are also close to each other. In this way, the upright pole connection assembly 100 is foldable through the first connecting rod 111 and the second connecting rod 112. Compared with some existing connection assemblies or connection methods, such as the connection method of two groups of X assemblies used in the side frame disclosed in CN103895672A, the upright pole connection assembly 100 has a simple structure and a small number of connection rods. Figures 7 to 9The application of the pole connection assembly 100 in a foldable cart C is shown, wherein the pole connection assembly 100 may include at least two pole connection members 110 spaced apart from each other in the upper and lower parts. The foldable cart C will be described in detail below.

[0054] In some embodiments, the pole connection assembly 100 may include at least two pole connection members 110 arranged at intervals, and in the pole connection assembly 100 or the at least two pole connection members 110 arranged at intervals, the first connection rods 111 are parallel to each other, and the second connection rods 112 are also parallel to each other. In particular, in a preferred embodiment, the first connection rods 111 that are parallel to each other have the same length, and the second connection rods 112 that are parallel to each other have the same length. In this way, the four hinge points at both ends (the proximal ends 111A and the distal ends 111B) of any two first connection rods 111 are respectively located at the four corners of a parallelogram, and the four hinge points at both ends (the proximal ends 112A and the distal ends 112B) of any two second connection rods 112 are also respectively located at the four corners of a parallelogram. In this way, the first connecting rods 111 form opposite sides of a parallelogram mechanism in pairs, and the second connecting rods 112 also form opposite sides of a parallelogram mechanism in pairs. In the process of extending and closing the vertical pole connecting assembly 100, the first connecting rods 111 always remain parallel to each other, and the second connecting rods 112 always remain parallel to each other. In this way, the vertical pole connecting assembly 100 is foldable by using the parallelogram structure composed of the first connecting rods 111 and the second connecting rods 112, and the structure is simple, the number of connecting rods is small, and after extending, it will not be easily folded, and the shape of the extended state can be well maintained. Figures 2 to 4 The extended state, the semi-closed state and the closed state of the vertical pole connection assembly 100 are respectively shown. It should be understood that in some other embodiments of the vertical pole connection assembly 100, the lengths of the first connection rods 111 may be different, and / or the lengths of the second connection rods 112 may be different; the first connection rods 111 may not be parallel or at least not always parallel, and / or the second connection rods 112 may not be parallel or at least not always parallel.

[0055] It should be understood that Figures 7 to 9 In the embodiment of the foldable stroller C shown, the spacing arrangement between the pole connection members 110 in a single pole connection assembly 100 is preferably arranged in an up-and-down spacing arrangement, that is, the pole connection assembly 100 is configured to include at least two pole connection members 110 arranged in an up-and-down spacing arrangement, which can bring additional benefits. Figure 2 and Figure 7As shown, in the extended state of the upright connection assembly 100, for a single upright 200 of two adjacent uprights 200 of the foldable cart C connected by the upright connection assembly 100, two or more upright connection members 310 are hinged to it, and these hinge points restrain each other, so that the upright 200 will not fall down by rotating around any hinge point alone, thereby ensuring the stability of the foldable cart C in the extended state of the upright connection assembly 100.

[0056] Preferably, in the vertical pole connection assembly 100, the length of the first connection rod 111 is equal to the length of the second connection rod 112, for example, the first connection rod 111 and the second connection rod 112 are symmetrical (such as about the point where they are hinged), so that the first connection rod 311 and the second connection rod 312 can be symmetrically rotated to achieve the extension and closure of the vertical pole connection assembly 100. It should be understood that the technical feature that the length of the first connection rod 111 is equal to the length of the second connection rod 112 can be combined with the aforementioned first connection rods 111 being parallel to each other and having the same length, and the first connection rods 112 being parallel to each other and having the same length.

[0057] It should be understood that after the first connecting rod 111 and the second connecting rod 112 rotate until the upright connecting assembly 100 extends from the closed state to the extended state, it is necessary to prevent the first connecting rod 111 and the second connecting rod 112 from continuing to rotate after the upright connecting assembly 100 extends to the position. Therefore, in some embodiments, Figure 5 and Figure 6 As shown, the pole connection assembly 100 may also have a first blocking portion 100A, which can 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, that is, after the pole connection assembly 100 is extended from the closed state to the extended state and extended to the full extent, the first connecting rod 111 and the second connecting rod 112 are prevented from continuing to rotate from the closed state to the extended state. In particular, as in Figures 7 to 9 In the foldable cart C shown, for the upright connection assembly 100 configured to include at least two upright connection members 110 spaced apart from each other, the first blocking portion 100A prevents the proximal ends 111A and 112A of the first connecting rod 111 and the second connecting rod 112 from continuing to move downward.

[0058] In some further embodiments, Figure 5 and Figure 6As shown, the vertical pole connection assembly 100 includes a groove-shaped shell connection member 120, and the groove-shaped shell connection member 120 has a groove 123 forming a groove bottom wall 121 and a groove side wall 122, and the groove bottom wall 121 is configured as a first blocking portion 100A. The first connecting rod 111 and the second connecting rod 112 are hingedly connected through the groove-shaped shell connecting member 120. The proximal end 111A of the first connecting rod 111 and the proximal end 112A of the second connecting rod 112 are respectively inserted into the groove-shaped shell connecting member 120 from both ends of the groove 123 and are hinged on the groove side walls 122 of the groove-shaped shell connecting member 120. The groove bottom wall 121 of the groove-shaped shell connecting member 120 serves as a first blocking portion 100A. After the vertical pole connecting assembly 100 is extended from the closed state to the extended state, the side surface of the proximal end 111A of the first connecting rod 111 and the side surface of the proximal end 112A of the second connecting rod 112 respectively abut against the groove bottom wall 121 (i.e., the first blocking portion 100A), so that the first connecting rod 111 and the second connecting rod 112 cannot continue to rotate, but can be rotated and closed. In particular, as in Figures 7 to 9 In the foldable stroller C shown, the pole connection assembly 100 is configured to include at least two pole connection members 110 spaced apart from each other, and the notch 123 of the groove-shaped shell connection member 120 is opened downward. When the pole connection assembly 100 is in the extended state, the side surface of the proximal end 111A of the first connecting rod 111 and the side surface of the proximal end 112A of the second connecting rod 112 respectively abut against the groove bottom wall 121 of the groove-shaped shell connection member 120 and cannot continue to move downward. It should be understood that, according to this function, the first blocking portion 100A can have various other implementation forms, which will not be described in detail here.

[0059] It should be understood that when the pole connection assembly 100 includes only one pole connection member 110, one of the above-mentioned groove-shaped shell connectors 120 may be configured to connect the first connecting rod 111 and the second connecting rod 112 of the pole connection member 110. When the pole connection assembly 100 includes at least two pole connection members 110, the above-mentioned groove-shaped shell connector 120 may be configured individually for each pole connection member 110 to connect the first connecting rod 111 and the second connecting rod 112 of the single pole connection member 110, and, at this time, a connector (not shown) such as a connecting plate may be further provided to connect the groove-shaped shell connectors into a whole, thereby realizing the synchronous extension and closing action of each pole connection member 110, and increasing the strength of the entire pole connection assembly 100; it may also be, for example, Figures 1 to 6As shown, a groove-shaped shell connector 120 can be configured, and the proximal ends 111A and 112A of the first connecting rod 111 and the proximal ends 112A of the second connecting rod 112 of each upright connecting member 110 are respectively inserted into the groove-shaped shell connector 120 from both ends of the groove 123 and are hinged to the groove side walls 122 of the groove-shaped shell connector 120. In this way, the structure is simplified and the synchronous extension and closing actions of each upright connecting member 110 in a single upright connecting assembly can be realized, wherein, after the upright connecting assembly 100 is extended from a closed state to an extended state, the side surfaces of the proximal ends 111A of the first connecting rod 111 and the proximal ends 112A of the second connecting rod 112 of at least one upright connecting member 110 respectively abut against the groove bottom wall 121 of the groove-shaped shell connector 120. For the upright connection assembly 100 in the foldable cart C which is configured to include at least two upright connection members 110 spaced apart from each other, the side surface of the proximal end 111A of the first connection rod 111 and the side surface of the proximal end 112A of the second connection rod 112 of the upright connection member 110 located at the uppermost side may respectively abut against the groove bottom wall 121 of the groove-shaped shell connection member 120, so that the first connection rod 111 and the second connection rod 112 in the entire upright connection assembly 100 cannot continue to rotate.

[0060] Figures 7 to 9 A foldable cart C according to the present invention is exemplarily shown, comprising a frame 1 and a plurality of wheels 2 arranged on the frame 1, wherein the frame 1 has an unfolded state and a folded state, and in the unfolded state, the wheels 2 are at the bottom of the frame 1. The frame 1 comprises a plurality of uprights 200 and one or more connecting assemblies, wherein at least one of the connecting assemblies is configured as the upright connecting assembly 100 described above.

[0061] The above-mentioned plurality of vertical poles 200 are arranged along the circumference of the frame 1, and the connecting components are respectively hingedly arranged between two vertical poles 200 adjacent to each other along the circumference of the frame 1, and the connecting components are foldable, so that they can be stretched and folded, so that the frame 1 is in an unfolded state or a folded state. It should be understood that, according to actual needs, the number of connecting components can vary with the number of vertical poles 200, for example, it can be ensured that each adjacent vertical pole 200 is connected with a connecting component, such as when the number of vertical poles 200 is two (such as the case of "the number of bottom support rods 110 is two and arranged in a V shape in the unfolded state" to be described later), the number of connecting components can be one; when the number of vertical poles 200 is three or more, the number of connecting components can be equal to the number of vertical poles 200, which is also three or more. Of course, in some embodiments, multiple (two or more) connecting components can be arranged between a pair of adjacent vertical poles 200.

[0062] In an embodiment with only one connection assembly, the one connection assembly is configured as the above-mentioned upright pole connection assembly 100. In an embodiment including multiple connection assemblies, at least one of the multiple connection assemblies is configured as the above-mentioned upright pole connection assembly 100. When applied to a foldable cart C, in the upright pole connection assembly 100, the proximal end 111A of the first connection rod 111 and the proximal end 112A of the second connection rod 112 can move downward or upward, so that their distal ends 111B and 112B rotate around their respective proximal ends 111A and 112A to move away from or approach each other, thereby allowing the upright pole connection assembly 100 to extend or close. When the upright pole connection assembly 100 extends to an extended state, the frame 1 is unfolded to an extended state, and when the upright pole connection assembly 100 is folded to a folded state, the frame 1 is folded to a folded state. Preferably, the upright pole connection assembly 100 included in the frame 1 is configured to include at least two upright pole connection members 110 spaced apart from each other.

[0063] Since the upright pole connection assembly 100 has fewer connecting rods and is easy to fold, the foldable cart C including the upright pole connection assembly 100 occupies a small space after being folded, and is easy to store and carry.

[0064] The frame 1 may further include a bottom frame 400, which is hinged between the plurality of uprights 200. When the frame 1 is in an unfolded state, the bottom frame 400 defines a bottom frame plane P, and objects to be transported may be placed on the bottom frame 400 / bottom frame plane P. In some embodiments, the bottom frame 400 may be foldable, such as Fig.10 As shown, the bottom frame 400 includes a plurality of bottom support rods 410, each of which has a converging end 410A and a diverging end 410B. Each bottom support rod 110 has the same length and is arranged at an angle to each other. The converging ends 410A of each bottom support rod 410 are hinged, and the diverging ends 410B of each bottom support rod 410 can rotate around their respective converging ends 410A to move away from or gather together. Each upright rod 200 is arranged circumferentially with each hinged converging end 410A as the center and is hinged to the diverging ends 410B of each bottom support rod 410. When each diverging end 410B moves away from each other, each upright rod 200 also moves away from each other, and the frame 1 is synchronously unfolded to the unfolded state; when each diverging end 410B gathers together, each upright rod 200 approaches each other, and the frame 1 is synchronously folded to the folded state. In the unfolded state, each bottom support rod 410 jointly defines the above-mentioned bottom frame plane P. The number of bottom support rods 410 can be the same as the number of vertical rods 200, which can be two or more, including three or more, four or more, five or more, etc. Figure 7 In the illustrated embodiment, the number of the bottom support rods 410 is four, and the four bottom support rods 410 are arranged in an X shape in the unfolded state. In other embodiments not shown, the number of the bottom support rods 410 can be three, and they are arranged in a Y shape in the unfolded state, for example, relative to Figure 7 In the embodiment shown, there is only one bottom support rod extending backward and two bottom support rods extending forward (not shown); alternatively, the number of bottom support rods 410 can be two, which are arranged in a V shape in the unfolded state, for example, relative to Figure 7 The embodiment shown has only two bottom support rods (not shown) extending forward. Of course, according to actual needs, the bottom support rods 410 can also be five, six, seven, eight or other numbers.

[0065] In some embodiments, the pole connection assembly 100 includes only one pole connection member 110. When the pole connection assembly 100 is in the extended state, the first connection rod 111 and the second connection rod 112 of the pole connection member 110 are in the same straight line. When the pole connection assembly 100 is used in a foldable cart C, in the unfolded state of the frame 1, that is, in the extended state of the pole connection assembly 100, the first connection rod 111 and the second connection rod 112 of the pole connection assembly 100 are not only in the same straight line, but also in the chassis plane P, so as to structurally strengthen the chassis 400 defining the chassis plane P and carry objects to be transported together.

[0066] In other embodiments, the pole connection assembly 100 includes at least two pole connection members 110 arranged at intervals, and each pole connection member 110 of the pole connection assembly 100 may be configured such that, when the pole connection assembly 100 is in an extended state, the first connecting rod 111 and the second connecting rod 112 are in the same straight line. Figures 7 to 9 In the illustrated embodiment, the pole connection assembly 100 is configured to include at least two pole connection members 110 spaced apart from each other. In the unfolded state of the vehicle frame 1, the first connection rod 111 and the second connection rod 112 of the pole connection member 110 located at the uppermost side of the pole connection assembly 100 are on the same straight line and in the chassis plane P. In this way, in the unfolded state, the pole connection member 110 located at the uppermost side of the pole connection assembly 100 can structurally reinforce the chassis 400 defining the chassis plane P and carry objects to be transported together with the chassis 400, thereby enhancing the carrying capacity of the foldable cart C. In addition, the objects to be transported during use are pressed on the pole connection member 110, so that the pole connection member 110 can be prevented from folding during use by virtue of the weight of the objects to be transported.

[0067] It should be understood that, according to actual needs, all the connecting components of the vehicle frame 1 can be configured as the vertical rod connecting components 100. For example, in some embodiments where all the connecting components are configured to include at least two vertically spaced-apart vertical rod connecting members 110 of the vertical rod connecting component 100, in the unfolded state, the first connecting rod 111 and the second connecting rod 112 of the uppermost vertical rod connecting member 110 in each vertical rod connecting component 100 are both in the underframe plane P. In this way, each vertical rod connecting component 100 and the underframe 400 together form a platform for placing objects. At this time, the upper end of the vertical rod 200 can also be set to be flush with the underframe plane P, so there is no railing, which facilitates the placement of larger-sized objects; it is also possible that some of the connecting components are configured as the vertical rod connecting components 100, and the other connecting components can be configured in any existing or non-existing suitable form, such as Figures 7 to 9 In the illustrated embodiment, among the four connecting components, two opposite connecting components are configured as the vertical rod connecting components 100, and the two vertical rod connecting components 100 are symmetrically arranged on the left and right sides of the vehicle frame 1 / underframe 400, and the other two opposite connecting components are configured as the secondary connecting components 300 to be described below.

[0068] When the vehicle frame 1 has multiple connecting components, on the premise of ensuring that at least one connecting component is configured as the vertical rod connecting component 100, it is also possible that at least one of these multiple connecting components is configured as the secondary connecting component 300. The secondary connecting component 300 includes two cross-arranged secondary connecting members 310. One end of a secondary connecting member 310 is hinged to the upper end of one of the adjacent two vertical rods 200, and the other end is hinged to the lower end of the other of the adjacent two vertical rods 200, and the other secondary connecting member 310 is arranged in the opposite way, forming a cross arrangement. Specifically, the secondary connecting member 310 includes a third connecting rod 311 and a fourth connecting rod 312 that are hinged to each other, and the third connecting rod 311 and the fourth connecting rod 312 are respectively hinged to the adjacent two vertical rods 200. When the third connecting rod 311 and the fourth connecting rod 312 of the secondary connecting member 310 rotate away from each other, the angle between the third connecting rod 311 and the fourth connecting rod 312 becomes larger, the secondary connecting component 300 extends, and the adjacent two vertical rods 200 also move away from each other, and the vehicle frame 1 is unfolded into the unfolded state, as shown in Figure 7 and Fig.12 shown; when the third connecting rod 311 and the fourth connecting rod 312 of the secondary connecting member 310 rotate towards each other, the angle between the third connecting rod 311 and the fourth connecting rod 312 becomes smaller, the secondary connecting component 300 closes, and the adjacent two vertical rods 200 also move closer to each other, and the vehicle frame 1 is folded into the folded state, as shown in Fig. 9 and Fig.14As shown. The crossed secondary connecting members 310 can act as railings to prevent objects to be transported from slipping. In the secondary connecting assembly 300, the cross-arranged secondary connecting members 310 have an intersection and are hinged at the intersection. In the secondary connecting member 310, the fourth connecting rod 312 is longer than the third connecting rod 311, and the two fourth connecting rods 312 are crossed and hinged, so that during the unfolding or folding process, the two secondary connecting members 310 are linked to each other. It should be understood that the number of cross-arranged secondary connecting members 310 included in the secondary connecting assembly 300 can be a suitable number of two or more, in particular, an even number of two or more. In particular, in a single secondary connecting assembly 300, the secondary connecting members 310 are symmetrical in pairs, such as Figure 12 to Figure 14 In the illustrated embodiment, in the secondary connection assembly 300, the two secondary connection members 310 are symmetrical (about their intersection). Figures 7 to 9 The illustrated embodiment exemplarily shows a frame having four connection components, among which two relative connection components are configured as secondary connection components 300, and the two secondary connection components 300 are symmetrically arranged on the front and rear sides of the frame 1 / underframe 400, and the other two relative connection components are configured as the above-mentioned upright connection components 100.

[0069] It should be understood that the connection assembly of the foldable stroller C is preferably configured as a pole connection assembly 100. For example, in some embodiments, the frame 1 includes only one connection assembly, and the connection assembly is configured as a pole connection assembly 100; in other embodiments, the frame 1 includes multiple (here, multiple includes two or more, three or more, etc.) connection assemblies, then under the premise of ensuring that one connection assembly is configured as a pole connection assembly 100, as needed, the other connection assemblies can be configured as a pole connection assembly 100 or as a secondary connection assembly 300, or can also be configured as other existing or non-existing suitable connection assemblies.

[0070] Preferably, if Figures 1 to 4 and Figures 7 to 9In the illustrated embodiment, the upright connection assembly 100 includes two upright connection members 110 arranged at intervals from top to bottom, and in a single upright connection member 110, the first connection rod 111 and the second connection rod 112 (such as about the point where they are hinged) are symmetrical, and the two upright connection assemblies 100 are symmetrically arranged on the left and right sides of the frame 1; the secondary connection assembly 300 includes two cross-arranged secondary connection members 310, the two cross-arranged secondary connection members 310 are hinged at their intersections, and in the secondary connection assembly 300, the two cross-arranged secondary connection members 310 (such as about their intersections) are symmetrical, and the two secondary connection assemblies 300 are symmetrically arranged on the front and rear sides of the frame 1; and the bottom support rods 410 of the bottom frame 400 have equal lengths. It should be understood that the extension, closure, gathering and similar actions between the various connection assemblies of the foldable stroller C and between the connection assembly and the bottom frame 400 are coordinated to achieve the unfolding and folding of the foldable stroller C.

[0071] After each bottom support rod 410 rotates until the frame 1 is unfolded from the folded state to the unfolded state, it is necessary to prevent each bottom support rod 410 from continuing to rotate after the frame 1 is unfolded to the full extent. Therefore, in some embodiments, Fig.10 As shown, the bottom frame 400 has a second blocking portion 400A. When the frame 1 is in the unfolded state, the second blocking portion 400A can unidirectionally prevent the bottom support rods 410 from rotating, that is, prevent the convergent ends 410A of the bottom support rods 410 from moving downward. In addition, when the frame 1 is in the unfolded state, the bottom support rods 410 jointly define the bottom frame plane P through the second blocking portion 400A. In some further embodiments, referring to Fig.10 and Fig.11 As shown, the base frame 400 further includes a hinge seat 420, and the convergent ends 410A of the bottom support rods 410 are hingedly connected via the hinge seat 420. Fig.10 and Fig.11 In the illustrated embodiment, the hinge seat 420 has a plurality of hinge slots 421, each of which forms a hinge slot bottom wall 421A and a hinge slot side wall 421B. The hinge slot 421 may be open downwards, and specifically, the hinge seat 420 may include a plate-like member 422, and the hinge slot side wall 421B extends downwards from the bottom side of the plate-like member 422, thereby forming a hinge slot 421 open downwards. The convergent ends 410A of each bottom support rod 410 are respectively inserted into each hinge slot 421 and are hinged to the hinge slot side wall 421B of the hinge slot 421 through a pin. The bottom support rod 410 can rotate around the pin / converging end 410A. In the unfolded state, the bottom wall 421A of the hinge groove constitutes a second blocking portion 400A. The bottom support rod 410 can rotate until the bottom wall 421A of the hinge groove 421 (or the bottom side surface of the plate-like member 422) abuts against the side surface of the converging end 410A of the bottom support rod 410, thereby obtaining the above-mentioned base frame plane P.

[0072] It should be understood that, in the process of the bottom support rods 410 of the base 400 moving away from or gathering together, the convergent ends 410A of the bottom support rods 410 also move downward or upward, and the frame 1 is unfolded or folded. Therefore, during the use of the foldable cart C, the hinge seat 420 to which the convergent ends 410A are hinged can also be used as a force application point for folding and unfolding the frame 1. When the frame 1 is to be folded, the hinge seat 420 is held and lifted upward, and the convergent ends 410A move upward, and the frame 1 can be folded into a folded state. When the frame 1 is to be unfolded, the hinge seat 420 is pressed downward, and the convergent ends 410A move downward, and the frame 1 can be unfolded into an unfolded state. It should also be understood that in some embodiments not shown, the above-mentioned wheels 2 can be installed on the hinge seat 420, for example, the wheels 2 are installed between the above-mentioned multiple hinge grooves 421 to provide support when the frame 1 is in the unfolded state. It should also be understood that in some embodiments, such as when the plate-like member 422 of the articulated seat 420 has an appropriate size, the foldable cart C can be used as a stool when the frame 1 is in the folded state.

[0073] It should be understood that the function of the second blocking portion 400A is to prevent the bottom support rod 410 from rotating in one direction when the vehicle frame 1 is in the unfolded state, that is, to prevent the convergent ends 410A of each bottom support rod 410 from moving downward, thereby forming the bottom frame plane P. Therefore, according to this function, the second blocking portion 400A can also have other implementation forms. For example, in the above-mentioned embodiment of "the number of bottom support rods 410 is two, and they are arranged in a V shape in the unfolded state", a blocking block (not shown) can be set on the lower side of the hinge position between the vertical rod 200 and the bottom support rod 410. The blocking block can be set on the vertical rod 200, and the second blocking portion is formed by the blocking block. In the unfolded state, the blocking block abuts against the lower side of the divergent end 410B of the bottom support rod 410, thereby preventing the convergent end 410A of the bottom support rod 410 from continuing to move downward.

[0074] It should be understood that, according to actual needs, the multiple wheels 2 of the frame 1 can be set at appropriate positions on the frame 1, including on the bottom support rod 410, the first connecting rod 111 and the second connecting rod 112. Preferably, the multiple wheels 2 are respectively set at the lower ends of the vertical rods 200. Optionally, the wheels 2 can be configured as universal wheels.

[0075] It should be understood that the first connecting rod 111, the second connecting rod 112, the vertical rod 200, the third connecting rod 311, the fourth connecting rod 312 and the bottom support rod 410 mentioned herein can be any suitable form of rod, including but not limited to straight rods, curved rods, wavy rods, etc. or a combination thereof (for example, part of the entire rod is straight, part of the rod is wavy, etc.), among which straight rods are preferred.

[0076] In some embodiments, Figures 7 to 9 and Fig.15As shown, the frame 1 further includes a handle assembly 500 for pushing and pulling the foldable cart C. The handle assembly 500 includes a handle seat 510 and a handle bar 520 mounted on the handle seat 510. A handle 530 can be mounted on the upper end of the handle bar 520 for easy pushing and pulling. At the same time, in order to facilitate the folding of the frame 1 and the rotation of the handle bar 520, the frame 1 can also include a handle steering assembly 600. The handle steering assembly 600 includes a pair of handle steering rods 610. The pair of handle steering rods 610 are respectively on both sides of the handle seat 510. The handle assembly 500 is hingedly mounted between two adjacent upright poles 200 through the pair of handle steering rods 610. One end of the handle steering rod 610 is hinged on the upright pole 200, and the other end is hinged on the handle seat 510. Preferably, the pair of handle steering rods 610 are symmetrically arranged on both sides of the handle seat 510. It should be understood that the extension and closing of the pair of handlebar steering rods 610 are coordinated with the extension, closing, gathering and similar actions of the connecting assembly and the bottom frame 400. Figures 7 to 9 and Fig.15 As shown, the handlebar steering rod 610 is hinged to the upright pole 200 through the hinge block 620. The hinge block 620 is hinged to the handlebar steering rod 610 and the upright pole 200 respectively. Specifically, the hinge block 620 is hinged to the upright pole 200, so that the handle assembly 500 and the handlebar steering rod 610 can be turned over as a whole relative to the bottom frame plane P; the hinge block 620 is hinged to the handlebar steering rod 610, and the hinge between the handlebar steering rod 610 and the handle seat 510 can be coordinated, so that the pair of handlebar steering rods 610 can be unfolded or folded as the frame 1 is unfolded or folded.

[0077] In some embodiments, Fig.16 and Fig.17 As shown, the handle rod 520 can be configured as a telescopic rod and includes a lower tube body 521 and an upper tube body 522, and a handle 530 is provided at the upper end of the upper tube body 522. The lower tube body 521 is fixedly mounted on the handle base 510, and an upper locking hole 521A and a lower locking hole 521B spaced apart in the axial direction are provided on the side wall of the lower tube body 521. The upper tube body 522 is inserted into the lower tube body 521, and an elastic member 522B is provided on the upper tube body 522 and is connected to a movable button 522C through the elastic member 522B. The elastic member 522B can bias the movable button 522C toward the side wall of the lower tube body 521 so that the movable button 522C can partially extend from the upper locking hole 521A or the lower locking hole 521B. As shown Fig.16 and Fig.17As shown, the elastic member 522B can be configured as a compression spring or an elastic sheet, etc., to give a biasing force to the movable button 522C, and the movable button 522C can be partially extended from the upper locking hole 521A or the lower locking hole 521B. For example, the size of the non-extended portion 522C1 of the movable button 522C is larger than the size of the upper locking hole 521A and the lower locking hole 521B, and the size of the extendable portion 522C2 is less than or equal to the size of the upper locking hole 521A and the lower locking hole 521B, so that it can be partially extended from the upper locking hole 521A or the lower locking hole 521B.

[0078] The upper tube body 522 is pulled to move axially in the lower tube body 521. Under the elastic biasing force of the elastic member 522B, the movable button 522C abuts against the inner side of the side wall of the lower tube body 521, and the handle rod 520 is extended. When the movable button 522C is aligned with the upper locking hole 521A, the elastic member 522B pushes the movable button 522C to partially extend from the upper locking hole 521A, thereby locking the upper tube body 522 and the lower tube body 521 together; the upper tube body 522 is pushed to move axially in the lower tube body 521, and the handle rod 520 is shortened. When the movable button 522C is aligned with the lower locking hole 521B, the elastic member 522B pushes the movable button 522C to partially extend from the lower locking hole 521B, thereby locking the upper tube body 522 and the lower tube body 521 together. When the upper tube 522 and the lower tube 521 are locked, the lock between the upper tube 522 and the lower tube 521 can be released by pressing the movable button 522C until the movable button 522C retracts and does not extend from the upper locking hole 521A or the lower locking hole 521B. Fig.17 As shown, the upper tube 522 is fixedly connected with a connection block 522A that can be placed in the lower tube 521. The connection block 522A can be fixedly arranged at the lower end of the upper tube 522 and has a blind hole 522D. The elastic member 522B and the movable button 522C are arranged in the blind hole 522D. During the movement of the movable button 522C, the unextended portion 522C1 of the movable button 522C is kept in the blind hole 522D. The blind hole 522D provides an installation space for the elastic member 522B and the movable button 522C, and provides a guide for the elastic movement of the elastic member 522B configured as a compression spring. Of course, in other embodiments, the blind hole can also be directly arranged in the upper tube 522.

[0079] It should be understood that the above description of the preferred embodiment is relatively detailed and cannot be regarded as limiting the scope of patent protection of the present invention. Under the enlightenment of the present invention, ordinary technicians in this field can also make substitutions or modifications without departing from the scope of protection of the claims of the present invention, which all fall within the scope of protection of the present invention. The scope of protection requested for the present invention shall be based on the attached claims.

Claims

1. A pole connection assembly (100) for a foldable stroller, the pole connection assembly (100) having an extended state and a closed state and being adapted to be hinged between adjacent poles of the foldable stroller, It is characterized in that The upright pole connection assembly (100) comprises at least one upright pole connection member (110), wherein the upright pole connection member (110) comprises a first connection rod (111) and a second connection rod (112), wherein the first connection rod (111) and the second connection rod (112) both have a proximal end (111A, 112A) and a distal end (111B, 112B), wherein the proximal ends (111A, 112A) of the first connection rod (111) and the second connection rod (112) are hinged, and the distal ends (111B, 112B) of the first connection rod (111) and the second connection rod (112) are respectively adapted to be hinged with adjacent upright poles of the foldable cart and can rotate around their respective proximal ends (111A, 112A) to move away from or closer to each other, thereby placing the upright pole connection assembly (100) in the extended state or the closed state.

2. The pole connection assembly (100) according to claim 1, It is characterized in that The vertical pole connection assembly (100) comprises at least two vertical pole connection components (110) arranged at intervals, and in the at least two vertical pole connection components (110), the first connection rods (111) are parallel to each other, and the second connection rods (112) are parallel to each other.

3. The pole connection assembly (100) according to claim 2, It is characterized in that In at least two of the vertical pole connecting components (110), the mutually parallel first connecting rods (111) have the same or different lengths, and the mutually parallel second connecting rods (112) have the same or different lengths.

4. The pole connection assembly (100) according to claim 1, It is characterized in that The first connecting rod (111) and the second connecting rod (112) are of equal length.

5. The pole connection assembly (100) according to claim 1, It is characterized in that In the extended state, the first connecting rod (111) and the second connecting rod (112) of the vertical rod connecting member (110) are on the same straight line.

6. The pole connection assembly (100) according to any one of claims 1 to 5, It is characterized in that The vertical pole connection assembly (100) has a first blocking portion (100A). When the vertical pole connection assembly (100) is in the extended state, the first blocking portion (100A) is suitable for unidirectionally preventing the first connecting rod (111) and the second connecting rod (112) from rotating.

7. The pole connection assembly (100) according to claim 6, It is characterized in that The vertical pole connection assembly (100) also includes a groove-shaped shell connection member (120), the groove-shaped shell connection member (120) has a groove bottom wall (121) and a groove side wall (122), the groove bottom wall (121) is configured as the first blocking portion (100A), and the proximal ends (111A, 112A) of the first connecting rod (111) and the second connecting rod (112) are respectively inserted into the groove-shaped shell connection member (120) from the groove (123) and are hinged to the groove side wall (122).

8. A foldable stroller (C), comprising a frame (1), It is characterized in that The frame (1) has an unfolded state and a folded state, and comprises: A plurality of upright poles (200), wherein the plurality of upright poles (200) are arranged along the circumference of the frame (1); One or more connecting components, the connecting components are hingedly arranged between adjacent uprights (200) and are suitable for being extended 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 stand pole connection assembly (100) for a foldable stroller as claimed in any one of claims 1 to 7.

9. The foldable stroller (C) according to claim 8, It is characterized in that The frame (1) comprises a plurality of the connection assemblies, at least one of the plurality of the connection assemblies is configured as a secondary connection assembly (300), the secondary connection assembly (300) comprises at least two cross-arranged secondary connection members (310), the secondary connection member (310) comprises a third connection rod (311) and a fourth connection rod (312) which are hinged to each other, and the third connection rod (311) and the fourth connection rod (312) are respectively hinged to the adjacent upright rods (200).

10. The foldable stroller (C) according to claim 9, It is characterized in that In the secondary connection assembly (300), the secondary connection members (310) arranged in a cross-like manner have a cross point and are hinged at the cross point.

11. A foldable stroller (C) according to any one of claims 8 to 10, It is characterized in that The frame (1) further comprises a bottom frame (400), wherein the bottom frame (400) is hinged between the plurality of uprights (200), and in the unfolded state, the bottom frame (400) defines a bottom frame plane (P).

12. The foldable stroller (C) according to claim 11, It is characterized in that In the unfolded state, in the upright pole connection assembly (100), the first connection rod (111) and the second connection rod (112) of the upright pole connection member (110) are on the same straight line and are both in the base frame plane (P).

13. The foldable stroller (C) according to claim 11, It is characterized in that The pole connection assembly (100) comprises at least two pole connection members (110) spaced apart from each other in an upper and lower arrangement. In the unfolded state, the first connection rod (111) and the second connection rod (112) of the pole connection member (110) located at the uppermost side of the pole connection assembly (100) are on the same straight line and are both in the base frame plane (P).

14. The foldable stroller (C) according to claim 11, It is characterized in that The base frame (400) comprises a plurality of bottom support rods (410), each of the bottom support rods (410) having a converging end (410A) and a diverging end (410B), the converging ends (410A) of each of the bottom support rods (410) being hinged to each other, and the diverging ends (410B) of each of the bottom support rods (410) being hinged to each of the plurality of vertical rods (200) and being adapted to rotate around their respective converging ends (410A) to move away from or toward each other.

15. The foldable stroller (C) according to claim 14, It is characterized in that Each of the bottom support rods (410) has an equal length.

16. The foldable stroller (C) according to claim 14, It is characterized in that The bottom frame (400) has a second blocking portion (400A), and when the frame (1) is in the unfolded state, the second blocking portion (400A) is suitable for unidirectionally preventing the bottom support rod (410) from rotating, so that the plurality of bottom support rods (410) jointly define the bottom frame plane (P).

17. The foldable stroller (C) according to claim 16, It is characterized in that The base frame (400) further comprises an articulated seat (420), the articulated seat (420) having a plurality of articulated grooves (421) respectively forming an articulated groove bottom wall (421A) and an articulated groove side wall (421B), the articulated groove bottom wall (421A) constituting the second blocking portion (400A), the converging ends (410A) of the plurality of bottom support rods (410) being respectively inserted into the plurality of articulated grooves (421) and being articulated to the articulated groove side walls (421B).

18. The foldable stroller (C) according to claim 8, It is characterized in that The frame (1) further comprises a handle assembly (500), wherein the handle assembly (500) comprises a handle seat (510) and a handle bar (520) mounted on the handle seat (510).

19. The foldable stroller (C) according to claim 18, It is characterized in that The frame (1) further comprises a handlebar steering assembly (600), wherein the handlebar steering assembly (600) comprises a handlebar steering rod (610), one end of the handlebar steering rod (610) being hinged to the vertical rod (200), and the other end of the handlebar steering rod (610) being hinged to the handlebar seat (510).

20. The foldable stroller (C) according to claim 19, It is characterized in that The handlebar steering rod (610) is hinged to the vertical rod (200) via a hinge block (620).

21. The foldable stroller (C) according to claim 18, It is characterized in that The handle bar (520) is configured as a telescopic bar and comprises: A lower tube body (521), the lower tube body (521) is fixedly mounted on the handle seat (510), and an upper locking hole (521A) and a lower locking hole (521B) spaced apart in the axial direction are provided on the side wall of the lower tube body (521); An upper tube body (522), the upper tube body (522) is inserted into the lower tube body (521), an elastic member (522B) is provided on the upper tube body (522) and connected to a movable button (522C) via the elastic member (522B), the elastic member (522B) being suitable for biasing the movable button (522C) toward the side wall of the lower tube body (521) so that the movable button (522C) partially protrudes from the upper locking hole (521A) or the lower locking hole (521B).

22. A foldable stroller (C) according to claim 21, It is characterized in that A connecting block (522A) suitable for being placed in the lower tube (521) is fixedly arranged on the upper tube (522), a blind hole (522D) is arranged on the connecting block (522A), and the elastic member (522B) and the movable button (522C) are arranged in the blind hole (522D).

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